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, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include <linux/of_net.h>
  33 #include "smsc95xx.h"
  34
  35 #define SMSC_CHIPNAME                   "smsc95xx"
  36 #define SMSC_DRIVER_VERSION             "1.0.6"
  37 #define HS_USB_PKT_SIZE                 (512)
  38 #define FS_USB_PKT_SIZE                 (64)
  39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  42 #define MAX_SINGLE_PACKET_SIZE          (2048)
  43 #define LAN95XX_EEPROM_MAGIC            (0x9500)
  44 #define EEPROM_MAC_OFFSET               (0x01)
  45 #define DEFAULT_TX_CSUM_ENABLE          (true)
  46 #define DEFAULT_RX_CSUM_ENABLE          (true)
  47 #define SMSC95XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC95XX_TX_OVERHEAD            (8)
  49 #define SMSC95XX_TX_OVERHEAD_CSUM       (12)
  50 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  51                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  52
  53 #define FEATURE_8_WAKEUP_FILTERS        (0x01)
  54 #define FEATURE_PHY_NLP_CROSSOVER       (0x02)
  55 #define FEATURE_REMOTE_WAKEUP           (0x04)
  56
  57 #define SUSPEND_SUSPEND0                (0x01)
  58 #define SUSPEND_SUSPEND1                (0x02)
  59 #define SUSPEND_SUSPEND2                (0x04)
  60 #define SUSPEND_SUSPEND3                (0x08)
  61 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  62                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  63
  64 #define CARRIER_CHECK_DELAY (2 * HZ)
  65
  66 struct smsc95xx_priv {
  67         u32 chip_id;
  68         u32 mac_cr;
  69         u32 hash_hi;
  70         u32 hash_lo;
  71         u32 wolopts;
  72         spinlock_t mac_cr_lock;
  73         u8 features;
  74         u8 suspend_flags;
  75         u8 mdix_ctrl;
  76         bool link_ok;
  77         struct delayed_work carrier_check;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  86                                             u32 *data, int in_pm)
  87 {
  88         u32 buf;
  89         int ret;
  90         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  91
  92         BUG_ON(!dev);
  93
  94         if (!in_pm)
  95                 fn = usbnet_read_cmd;
  96         else
  97                 fn = usbnet_read_cmd_nopm;
  98
  99         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 100                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101                  0, index, &buf, 4);
 102         if (unlikely(ret < 0)) {
 103                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 104                             index, ret);
 105                 return ret;
 106         }
 107
 108         le32_to_cpus(&buf);
 109         *data = buf;
 110
 111         return ret;
 112 }
 113
 114 static int __must_check __smsc95xx_write_reg(struct usbnet *dev, u32 index,
 115                                              u32 data, int in_pm)
 116 {
 117         u32 buf;
 118         int ret;
 119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121         BUG_ON(!dev);
 122
 123         if (!in_pm)
 124                 fn = usbnet_write_cmd;
 125         else
 126                 fn = usbnet_write_cmd_nopm;
 127
 128         buf = data;
 129         cpu_to_le32s(&buf);
 130
 131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                  0, index, &buf, 4);
 134         if (unlikely(ret < 0))
 135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136                             index, ret);
 137
 138         return ret;
 139 }
 140
 141 static int __must_check smsc95xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142                                                u32 *data)
 143 {
 144         return __smsc95xx_read_reg(dev, index, data, 1);
 145 }
 146
 147 static int __must_check smsc95xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148                                                 u32 data)
 149 {
 150         return __smsc95xx_write_reg(dev, index, data, 1);
 151 }
 152
 153 static int __must_check smsc95xx_read_reg(struct usbnet *dev, u32 index,
 154                                           u32 *data)
 155 {
 156         return __smsc95xx_read_reg(dev, index, data, 0);
 157 }
 158
 159 static int __must_check smsc95xx_write_reg(struct usbnet *dev, u32 index,
 160                                            u32 data)
 161 {
 162         return __smsc95xx_write_reg(dev, index, data, 0);
 163 }
 164
 165 /* Loop until the read is completed with timeout
 166  * called with phy_mutex held */
 167 static int __must_check __smsc95xx_phy_wait_not_busy(struct usbnet *dev,
 168                                                      int in_pm)
 169 {
 170         unsigned long start_time = jiffies;
 171         u32 val;
 172         int ret;
 173
 174         do {
 175                 ret = __smsc95xx_read_reg(dev, MII_ADDR, &val, in_pm);
 176                 if (ret < 0) {
 177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178                         return ret;
 179                 }
 180
 181                 if (!(val & MII_BUSY_))
 182                         return 0;
 183         } while (!time_after(jiffies, start_time + HZ));
 184
 185         return -EIO;
 186 }
 187
 188 static int __smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189                                 int in_pm)
 190 {
 191         struct usbnet *dev = netdev_priv(netdev);
 192         u32 val, addr;
 193         int ret;
 194
 195         mutex_lock(&dev->phy_mutex);
 196
 197         /* confirm MII not busy */
 198         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_read\n");
 201                 goto done;
 202         }
 203
 204         /* set the address, index & direction (read from PHY) */
 205         phy_id &= dev->mii.phy_id_mask;
 206         idx &= dev->mii.reg_num_mask;
 207         addr = (phy_id << 11) | (idx << 6) | MII_READ_ | MII_BUSY_;
 208         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 209         if (ret < 0) {
 210                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 211                 goto done;
 212         }
 213
 214         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 215         if (ret < 0) {
 216                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 217                 goto done;
 218         }
 219
 220         ret = __smsc95xx_read_reg(dev, MII_DATA, &val, in_pm);
 221         if (ret < 0) {
 222                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 223                 goto done;
 224         }
 225
 226         ret = (u16)(val & 0xFFFF);
 227
 228 done:
 229         mutex_unlock(&dev->phy_mutex);
 230         return ret;
 231 }
 232
 233 static void __smsc95xx_mdio_write(struct net_device *netdev, int phy_id,
 234                                   int idx, int regval, int in_pm)
 235 {
 236         struct usbnet *dev = netdev_priv(netdev);
 237         u32 val, addr;
 238         int ret;
 239
 240         mutex_lock(&dev->phy_mutex);
 241
 242         /* confirm MII not busy */
 243         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 244         if (ret < 0) {
 245                 netdev_warn(dev->net, "MII is busy in smsc95xx_mdio_write\n");
 246                 goto done;
 247         }
 248
 249         val = regval;
 250         ret = __smsc95xx_write_reg(dev, MII_DATA, val, in_pm);
 251         if (ret < 0) {
 252                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 253                 goto done;
 254         }
 255
 256         /* set the address, index & direction (write to PHY) */
 257         phy_id &= dev->mii.phy_id_mask;
 258         idx &= dev->mii.reg_num_mask;
 259         addr = (phy_id << 11) | (idx << 6) | MII_WRITE_ | MII_BUSY_;
 260         ret = __smsc95xx_write_reg(dev, MII_ADDR, addr, in_pm);
 261         if (ret < 0) {
 262                 netdev_warn(dev->net, "Error writing MII_ADDR\n");
 263                 goto done;
 264         }
 265
 266         ret = __smsc95xx_phy_wait_not_busy(dev, in_pm);
 267         if (ret < 0) {
 268                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 269                 goto done;
 270         }
 271
 272 done:
 273         mutex_unlock(&dev->phy_mutex);
 274 }
 275
 276 static int smsc95xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 277                                    int idx)
 278 {
 279         return __smsc95xx_mdio_read(netdev, phy_id, idx, 1);
 280 }
 281
 282 static void smsc95xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 283                                      int idx, int regval)
 284 {
 285         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 1);
 286 }
 287
 288 static int smsc95xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 289 {
 290         return __smsc95xx_mdio_read(netdev, phy_id, idx, 0);
 291 }
 292
 293 static void smsc95xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 294                                 int regval)
 295 {
 296         __smsc95xx_mdio_write(netdev, phy_id, idx, regval, 0);
 297 }
 298
 299 static int __must_check smsc95xx_wait_eeprom(struct usbnet *dev)
 300 {
 301         unsigned long start_time = jiffies;
 302         u32 val;
 303         int ret;
 304
 305         do {
 306                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 307                 if (ret < 0) {
 308                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 309                         return ret;
 310                 }
 311
 312                 if (!(val & E2P_CMD_BUSY_) || (val & E2P_CMD_TIMEOUT_))
 313                         break;
 314                 udelay(40);
 315         } while (!time_after(jiffies, start_time + HZ));
 316
 317         if (val & (E2P_CMD_TIMEOUT_ | E2P_CMD_BUSY_)) {
 318                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 319                 return -EIO;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int __must_check smsc95xx_eeprom_confirm_not_busy(struct usbnet *dev)
 326 {
 327         unsigned long start_time = jiffies;
 328         u32 val;
 329         int ret;
 330
 331         do {
 332                 ret = smsc95xx_read_reg(dev, E2P_CMD, &val);
 333                 if (ret < 0) {
 334                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 335                         return ret;
 336                 }
 337
 338                 if (!(val & E2P_CMD_BUSY_))
 339                         return 0;
 340
 341                 udelay(40);
 342         } while (!time_after(jiffies, start_time + HZ));
 343
 344         netdev_warn(dev->net, "EEPROM is busy\n");
 345         return -EIO;
 346 }
 347
 348 static int smsc95xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 349                                 u8 *data)
 350 {
 351         u32 val;
 352         int i, ret;
 353
 354         BUG_ON(!dev);
 355         BUG_ON(!data);
 356
 357         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 358         if (ret)
 359                 return ret;
 360
 361         for (i = 0; i < length; i++) {
 362                 val = E2P_CMD_BUSY_ | E2P_CMD_READ_ | (offset & E2P_CMD_ADDR_);
 363                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 364                 if (ret < 0) {
 365                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 366                         return ret;
 367                 }
 368
 369                 ret = smsc95xx_wait_eeprom(dev);
 370                 if (ret < 0)
 371                         return ret;
 372
 373                 ret = smsc95xx_read_reg(dev, E2P_DATA, &val);
 374                 if (ret < 0) {
 375                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 376                         return ret;
 377                 }
 378
 379                 data[i] = val & 0xFF;
 380                 offset++;
 381         }
 382
 383         return 0;
 384 }
 385
 386 static int smsc95xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 387                                  u8 *data)
 388 {
 389         u32 val;
 390         int i, ret;
 391
 392         BUG_ON(!dev);
 393         BUG_ON(!data);
 394
 395         ret = smsc95xx_eeprom_confirm_not_busy(dev);
 396         if (ret)
 397                 return ret;
 398
 399         /* Issue write/erase enable command */
 400         val = E2P_CMD_BUSY_ | E2P_CMD_EWEN_;
 401         ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 402         if (ret < 0) {
 403                 netdev_warn(dev->net, "Error writing E2P_DATA\n");
 404                 return ret;
 405         }
 406
 407         ret = smsc95xx_wait_eeprom(dev);
 408         if (ret < 0)
 409                 return ret;
 410
 411         for (i = 0; i < length; i++) {
 412
 413                 /* Fill data register */
 414                 val = data[i];
 415                 ret = smsc95xx_write_reg(dev, E2P_DATA, val);
 416                 if (ret < 0) {
 417                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 418                         return ret;
 419                 }
 420
 421                 /* Send "write" command */
 422                 val = E2P_CMD_BUSY_ | E2P_CMD_WRITE_ | (offset & E2P_CMD_ADDR_);
 423                 ret = smsc95xx_write_reg(dev, E2P_CMD, val);
 424                 if (ret < 0) {
 425                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 426                         return ret;
 427                 }
 428
 429                 ret = smsc95xx_wait_eeprom(dev);
 430                 if (ret < 0)
 431                         return ret;
 432
 433                 offset++;
 434         }
 435
 436         return 0;
 437 }
 438
 439 static int __must_check smsc95xx_write_reg_async(struct usbnet *dev, u16 index,
 440                                                  u32 data)
 441 {
 442         const u16 size = 4;
 443         u32 buf;
 444         int ret;
 445
 446         buf = data;
 447         cpu_to_le32s(&buf);
 448
 449         ret = usbnet_write_cmd_async(dev, USB_VENDOR_REQUEST_WRITE_REGISTER,
 450                                      USB_DIR_OUT | USB_TYPE_VENDOR |
 451                                      USB_RECIP_DEVICE,
 452                                      0, index, &buf, size);
 453         if (ret < 0)
 454                 netdev_warn(dev->net, "Error write async cmd, sts=%d\n",
 455                             ret);
 456         return ret;
 457 }
 458
 459 /* returns hash bit number for given MAC address
 460  * example:
 461  * 01 00 5E 00 00 01 -> returns bit number 31 */
 462 static unsigned int smsc95xx_hash(char addr[ETH_ALEN])
 463 {
 464         return (ether_crc(ETH_ALEN, addr) >> 26) & 0x3f;
 465 }
 466
 467 static void smsc95xx_set_multicast(struct net_device *netdev)
 468 {
 469         struct usbnet *dev = netdev_priv(netdev);
 470         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 471         unsigned long flags;
 472         int ret;
 473
 474         pdata->hash_hi = 0;
 475         pdata->hash_lo = 0;
 476
 477         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 478
 479         if (dev->net->flags & IFF_PROMISC) {
 480                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 481                 pdata->mac_cr |= MAC_CR_PRMS_;
 482                 pdata->mac_cr &= ~(MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 483         } else if (dev->net->flags & IFF_ALLMULTI) {
 484                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 485                 pdata->mac_cr |= MAC_CR_MCPAS_;
 486                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_HPFILT_);
 487         } else if (!netdev_mc_empty(dev->net)) {
 488                 struct netdev_hw_addr *ha;
 489
 490                 pdata->mac_cr |= MAC_CR_HPFILT_;
 491                 pdata->mac_cr &= ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_);
 492
 493                 netdev_for_each_mc_addr(ha, netdev) {
 494                         u32 bitnum = smsc95xx_hash(ha->addr);
 495                         u32 mask = 0x01 << (bitnum & 0x1F);
 496                         if (bitnum & 0x20)
 497                                 pdata->hash_hi |= mask;
 498                         else
 499                                 pdata->hash_lo |= mask;
 500                 }
 501
 502                 netif_dbg(dev, drv, dev->net, "HASHH=0x%08X, HASHL=0x%08X\n",
 503                                    pdata->hash_hi, pdata->hash_lo);
 504         } else {
 505                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 506                 pdata->mac_cr &=
 507                         ~(MAC_CR_PRMS_ | MAC_CR_MCPAS_ | MAC_CR_HPFILT_);
 508         }
 509
 510         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 511
 512         /* Initiate async writes, as we can't wait for completion here */
 513         ret = smsc95xx_write_reg_async(dev, HASHH, pdata->hash_hi);
 514         if (ret < 0)
 515                 netdev_warn(dev->net, "failed to initiate async write to HASHH\n");
 516
 517         ret = smsc95xx_write_reg_async(dev, HASHL, pdata->hash_lo);
 518         if (ret < 0)
 519                 netdev_warn(dev->net, "failed to initiate async write to HASHL\n");
 520
 521         ret = smsc95xx_write_reg_async(dev, MAC_CR, pdata->mac_cr);
 522         if (ret < 0)
 523                 netdev_warn(dev->net, "failed to initiate async write to MAC_CR\n");
 524 }
 525
 526 static int smsc95xx_phy_update_flowcontrol(struct usbnet *dev, u8 duplex,
 527                                            u16 lcladv, u16 rmtadv)
 528 {
 529         u32 flow = 0, afc_cfg;
 530
 531         int ret = smsc95xx_read_reg(dev, AFC_CFG, &afc_cfg);
 532         if (ret < 0)
 533                 return ret;
 534
 535         if (duplex == DUPLEX_FULL) {
 536                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 537
 538                 if (cap & FLOW_CTRL_RX)
 539                         flow = 0xFFFF0002;
 540
 541                 if (cap & FLOW_CTRL_TX) {
 542                         afc_cfg |= 0xF;
 543                         flow |= 0xFFFF0000;
 544                 } else {
 545                         afc_cfg &= ~0xF;
 546                 }
 547
 548                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 549                                    cap & FLOW_CTRL_RX ? "enabled" : "disabled",
 550                                    cap & FLOW_CTRL_TX ? "enabled" : "disabled");
 551         } else {
 552                 netif_dbg(dev, link, dev->net, "half duplex\n");
 553                 afc_cfg |= 0xF;
 554         }
 555
 556         ret = smsc95xx_write_reg(dev, FLOW, flow);
 557         if (ret < 0)
 558                 return ret;
 559
 560         return smsc95xx_write_reg(dev, AFC_CFG, afc_cfg);
 561 }
 562
 563 static int smsc95xx_link_reset(struct usbnet *dev)
 564 {
 565         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 566         struct mii_if_info *mii = &dev->mii;
 567         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 568         unsigned long flags;
 569         u16 lcladv, rmtadv;
 570         int ret;
 571
 572         /* clear interrupt status */
 573         ret = smsc95xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC);
 574         if (ret < 0)
 575                 return ret;
 576
 577         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
 578         if (ret < 0)
 579                 return ret;
 580
 581         mii_check_media(mii, 1, 1);
 582         mii_ethtool_gset(&dev->mii, &ecmd);
 583         lcladv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 584         rmtadv = smsc95xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 585
 586         netif_dbg(dev, link, dev->net,
 587                   "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 588                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 589
 590         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 591         if (ecmd.duplex != DUPLEX_FULL) {
 592                 pdata->mac_cr &= ~MAC_CR_FDPX_;
 593                 pdata->mac_cr |= MAC_CR_RCVOWN_;
 594         } else {
 595                 pdata->mac_cr &= ~MAC_CR_RCVOWN_;
 596                 pdata->mac_cr |= MAC_CR_FDPX_;
 597         }
 598         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 599
 600         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 601         if (ret < 0)
 602                 return ret;
 603
 604         ret = smsc95xx_phy_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 605         if (ret < 0)
 606                 netdev_warn(dev->net, "Error updating PHY flow control\n");
 607
 608         return ret;
 609 }
 610
 611 static void smsc95xx_status(struct usbnet *dev, struct urb *urb)
 612 {
 613         u32 intdata;
 614
 615         if (urb->actual_length != 4) {
 616                 netdev_warn(dev->net, "unexpected urb length %d\n",
 617                             urb->actual_length);
 618                 return;
 619         }
 620
 621         memcpy(&intdata, urb->transfer_buffer, 4);
 622         le32_to_cpus(&intdata);
 623
 624         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 625
 626         if (intdata & INT_ENP_PHY_INT_)
 627                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 628         else
 629                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 630                             intdata);
 631 }
 632
 633 static void set_carrier(struct usbnet *dev, bool link)
 634 {
 635         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 636
 637         if (pdata->link_ok == link)
 638                 return;
 639
 640         pdata->link_ok = link;
 641
 642         if (link)
 643                 usbnet_link_change(dev, 1, 0);
 644         else
 645                 usbnet_link_change(dev, 0, 0);
 646 }
 647
 648 static void check_carrier(struct work_struct *work)
 649 {
 650         struct smsc95xx_priv *pdata = container_of(work, struct smsc95xx_priv,
 651                                                 carrier_check.work);
 652         struct usbnet *dev = pdata->dev;
 653         int ret;
 654
 655         if (pdata->suspend_flags != 0)
 656                 return;
 657
 658         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMSR);
 659         if (ret < 0) {
 660                 netdev_warn(dev->net, "Failed to read MII_BMSR\n");
 661                 return;
 662         }
 663         if (ret & BMSR_LSTATUS)
 664                 set_carrier(dev, 1);
 665         else
 666                 set_carrier(dev, 0);
 667
 668         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
 669 }
 670
 671 /* Enable or disable Tx & Rx checksum offload engines */
 672 static int smsc95xx_set_features(struct net_device *netdev,
 673         netdev_features_t features)
 674 {
 675         struct usbnet *dev = netdev_priv(netdev);
 676         u32 read_buf;
 677         int ret;
 678
 679         ret = smsc95xx_read_reg(dev, COE_CR, &read_buf);
 680         if (ret < 0)
 681                 return ret;
 682
 683         if (features & NETIF_F_IP_CSUM)
 684                 read_buf |= Tx_COE_EN_;
 685         else
 686                 read_buf &= ~Tx_COE_EN_;
 687
 688         if (features & NETIF_F_RXCSUM)
 689                 read_buf |= Rx_COE_EN_;
 690         else
 691                 read_buf &= ~Rx_COE_EN_;
 692
 693         ret = smsc95xx_write_reg(dev, COE_CR, read_buf);
 694         if (ret < 0)
 695                 return ret;
 696
 697         netif_dbg(dev, hw, dev->net, "COE_CR = 0x%08x\n", read_buf);
 698         return 0;
 699 }
 700
 701 static int smsc95xx_ethtool_get_eeprom_len(struct net_device *net)
 702 {
 703         return MAX_EEPROM_SIZE;
 704 }
 705
 706 static int smsc95xx_ethtool_get_eeprom(struct net_device *netdev,
 707                                        struct ethtool_eeprom *ee, u8 *data)
 708 {
 709         struct usbnet *dev = netdev_priv(netdev);
 710
 711         ee->magic = LAN95XX_EEPROM_MAGIC;
 712
 713         return smsc95xx_read_eeprom(dev, ee->offset, ee->len, data);
 714 }
 715
 716 static int smsc95xx_ethtool_set_eeprom(struct net_device *netdev,
 717                                        struct ethtool_eeprom *ee, u8 *data)
 718 {
 719         struct usbnet *dev = netdev_priv(netdev);
 720
 721         if (ee->magic != LAN95XX_EEPROM_MAGIC) {
 722                 netdev_warn(dev->net, "EEPROM: magic value mismatch, magic = 0x%x\n",
 723                             ee->magic);
 724                 return -EINVAL;
 725         }
 726
 727         return smsc95xx_write_eeprom(dev, ee->offset, ee->len, data);
 728 }
 729
 730 static int smsc95xx_ethtool_getregslen(struct net_device *netdev)
 731 {
 732         /* all smsc95xx registers */
 733         return COE_CR - ID_REV + sizeof(u32);
 734 }
 735
 736 static void
 737 smsc95xx_ethtool_getregs(struct net_device *netdev, struct ethtool_regs *regs,
 738                          void *buf)
 739 {
 740         struct usbnet *dev = netdev_priv(netdev);
 741         unsigned int i, j;
 742         int retval;
 743         u32 *data = buf;
 744
 745         retval = smsc95xx_read_reg(dev, ID_REV, &regs->version);
 746         if (retval < 0) {
 747                 netdev_warn(netdev, "REGS: cannot read ID_REV\n");
 748                 return;
 749         }
 750
 751         for (i = ID_REV, j = 0; i <= COE_CR; i += (sizeof(u32)), j++) {
 752                 retval = smsc95xx_read_reg(dev, i, &data[j]);
 753                 if (retval < 0) {
 754                         netdev_warn(netdev, "REGS: cannot read reg[%x]\n", i);
 755                         return;
 756                 }
 757         }
 758 }
 759
 760 static void smsc95xx_ethtool_get_wol(struct net_device *net,
 761                                      struct ethtool_wolinfo *wolinfo)
 762 {
 763         struct usbnet *dev = netdev_priv(net);
 764         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 765
 766         wolinfo->supported = SUPPORTED_WAKE;
 767         wolinfo->wolopts = pdata->wolopts;
 768 }
 769
 770 static int smsc95xx_ethtool_set_wol(struct net_device *net,
 771                                     struct ethtool_wolinfo *wolinfo)
 772 {
 773         struct usbnet *dev = netdev_priv(net);
 774         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 775         int ret;
 776
 777         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 778                 return -EINVAL;
 779
 780         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 781
 782         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 783         if (ret < 0)
 784                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 785
 786         return ret;
 787 }
 788
 789 static int get_mdix_status(struct net_device *net)
 790 {
 791         struct usbnet *dev = netdev_priv(net);
 792         u32 val;
 793         int buf;
 794
 795         buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, SPECIAL_CTRL_STS);
 796         if (buf & SPECIAL_CTRL_STS_OVRRD_AMDIX_) {
 797                 if (buf & SPECIAL_CTRL_STS_AMDIX_ENABLE_)
 798                         return ETH_TP_MDI_AUTO;
 799                 else if (buf & SPECIAL_CTRL_STS_AMDIX_STATE_)
 800                         return ETH_TP_MDI_X;
 801         } else {
 802                 buf = smsc95xx_read_reg(dev, STRAP_STATUS, &val);
 803                 if (val & STRAP_STATUS_AMDIX_EN_)
 804                         return ETH_TP_MDI_AUTO;
 805         }
 806
 807         return ETH_TP_MDI;
 808 }
 809
 810 static void set_mdix_status(struct net_device *net, __u8 mdix_ctrl)
 811 {
 812         struct usbnet *dev = netdev_priv(net);
 813         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 814         int buf;
 815
 816         if ((pdata->chip_id == ID_REV_CHIP_ID_9500A_) ||
 817             (pdata->chip_id == ID_REV_CHIP_ID_9530_) ||
 818             (pdata->chip_id == ID_REV_CHIP_ID_89530_) ||
 819             (pdata->chip_id == ID_REV_CHIP_ID_9730_)) {
 820                 /* Extend Manual AutoMDIX timer for 9500A/9500Ai */
 821                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 822                                          PHY_EDPD_CONFIG);
 823                 buf |= PHY_EDPD_CONFIG_EXT_CROSSOVER_;
 824                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 825                                     PHY_EDPD_CONFIG, buf);
 826         }
 827
 828         if (mdix_ctrl == ETH_TP_MDI) {
 829                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 830                                          SPECIAL_CTRL_STS);
 831                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 832                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 833                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 834                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 835                                     SPECIAL_CTRL_STS, buf);
 836         } else if (mdix_ctrl == ETH_TP_MDI_X) {
 837                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 838                                          SPECIAL_CTRL_STS);
 839                 buf |= SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 840                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 841                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 842                 buf |= SPECIAL_CTRL_STS_AMDIX_STATE_;
 843                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 844                                     SPECIAL_CTRL_STS, buf);
 845         } else if (mdix_ctrl == ETH_TP_MDI_AUTO) {
 846                 buf = smsc95xx_mdio_read(dev->net, dev->mii.phy_id,
 847                                          SPECIAL_CTRL_STS);
 848                 buf &= ~SPECIAL_CTRL_STS_OVRRD_AMDIX_;
 849                 buf &= ~(SPECIAL_CTRL_STS_AMDIX_ENABLE_ |
 850                          SPECIAL_CTRL_STS_AMDIX_STATE_);
 851                 buf |= SPECIAL_CTRL_STS_AMDIX_ENABLE_;
 852                 smsc95xx_mdio_write(dev->net, dev->mii.phy_id,
 853                                     SPECIAL_CTRL_STS, buf);
 854         }
 855         pdata->mdix_ctrl = mdix_ctrl;
 856 }
 857
 858 static int smsc95xx_get_link_ksettings(struct net_device *net,
 859                                        struct ethtool_link_ksettings *cmd)
 860 {
 861         struct usbnet *dev = netdev_priv(net);
 862         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 863         int retval;
 864
 865         retval = usbnet_get_link_ksettings(net, cmd);
 866
 867         cmd->base.eth_tp_mdix = pdata->mdix_ctrl;
 868         cmd->base.eth_tp_mdix_ctrl = pdata->mdix_ctrl;
 869
 870         return retval;
 871 }
 872
 873 static int smsc95xx_set_link_ksettings(struct net_device *net,
 874                                        const struct ethtool_link_ksettings *cmd)
 875 {
 876         struct usbnet *dev = netdev_priv(net);
 877         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 878         int retval;
 879
 880         if (pdata->mdix_ctrl != cmd->base.eth_tp_mdix_ctrl)
 881                 set_mdix_status(net, cmd->base.eth_tp_mdix_ctrl);
 882
 883         retval = usbnet_set_link_ksettings(net, cmd);
 884
 885         return retval;
 886 }
 887
 888 static const struct ethtool_ops smsc95xx_ethtool_ops = {
 889         .get_link       = usbnet_get_link,
 890         .nway_reset     = usbnet_nway_reset,
 891         .get_drvinfo    = usbnet_get_drvinfo,
 892         .get_msglevel   = usbnet_get_msglevel,
 893         .set_msglevel   = usbnet_set_msglevel,
 894         .get_eeprom_len = smsc95xx_ethtool_get_eeprom_len,
 895         .get_eeprom     = smsc95xx_ethtool_get_eeprom,
 896         .set_eeprom     = smsc95xx_ethtool_set_eeprom,
 897         .get_regs_len   = smsc95xx_ethtool_getregslen,
 898         .get_regs       = smsc95xx_ethtool_getregs,
 899         .get_wol        = smsc95xx_ethtool_get_wol,
 900         .set_wol        = smsc95xx_ethtool_set_wol,
 901         .get_link_ksettings     = smsc95xx_get_link_ksettings,
 902         .set_link_ksettings     = smsc95xx_set_link_ksettings,
 903         .get_ts_info    = ethtool_op_get_ts_info,
 904 };
 905
 906 static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 907 {
 908         struct usbnet *dev = netdev_priv(netdev);
 909
 910         if (!netif_running(netdev))
 911                 return -EINVAL;
 912
 913         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 914 }
 915
 916 static void smsc95xx_init_mac_address(struct usbnet *dev)
 917 {
 918         const u8 *mac_addr;
 919
 920         /* maybe the boot loader passed the MAC address in devicetree */
 921         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 922         if (mac_addr) {
 923                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 924                 return;
 925         }
 926
 927         /* try reading mac address from EEPROM */
 928         if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 929                         dev->net->dev_addr) == 0) {
 930                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 931                         /* eeprom values are valid so use them */
 932                         netif_dbg(dev, ifup, dev->net, "MAC address read from EEPROM\n");
 933                         return;
 934                 }
 935         }
 936
 937         /* no useful static MAC address found. generate a random one */
 938         eth_hw_addr_random(dev->net);
 939         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 940 }
 941
 942 static int smsc95xx_set_mac_address(struct usbnet *dev)
 943 {
 944         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 945                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 946         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 947         int ret;
 948
 949         ret = smsc95xx_write_reg(dev, ADDRL, addr_lo);
 950         if (ret < 0)
 951                 return ret;
 952
 953         return smsc95xx_write_reg(dev, ADDRH, addr_hi);
 954 }
 955
 956 /* starts the TX path */
 957 static int smsc95xx_start_tx_path(struct usbnet *dev)
 958 {
 959         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 960         unsigned long flags;
 961         int ret;
 962
 963         /* Enable Tx at MAC */
 964         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 965         pdata->mac_cr |= MAC_CR_TXEN_;
 966         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 967
 968         ret = smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr);
 969         if (ret < 0)
 970                 return ret;
 971
 972         /* Enable Tx at SCSRs */
 973         return smsc95xx_write_reg(dev, TX_CFG, TX_CFG_ON_);
 974 }
 975
 976 /* Starts the Receive path */
 977 static int smsc95xx_start_rx_path(struct usbnet *dev, int in_pm)
 978 {
 979         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 980         unsigned long flags;
 981
 982         spin_lock_irqsave(&pdata->mac_cr_lock, flags);
 983         pdata->mac_cr |= MAC_CR_RXEN_;
 984         spin_unlock_irqrestore(&pdata->mac_cr_lock, flags);
 985
 986         return __smsc95xx_write_reg(dev, MAC_CR, pdata->mac_cr, in_pm);
 987 }
 988
 989 static int smsc95xx_phy_initialize(struct usbnet *dev)
 990 {
 991         int bmcr, ret, timeout = 0;
 992
 993         /* Initialize MII structure */
 994         dev->mii.dev = dev->net;
 995         dev->mii.mdio_read = smsc95xx_mdio_read;
 996         dev->mii.mdio_write = smsc95xx_mdio_write;
 997         dev->mii.phy_id_mask = 0x1f;
 998         dev->mii.reg_num_mask = 0x1f;
 999         dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
1000
1001         /* reset phy and wait for reset to complete */
1002         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
1003
1004         do {
1005                 msleep(10);
1006                 bmcr = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
1007                 timeout++;
1008         } while ((bmcr & BMCR_RESET) && (timeout < 100));
1009
1010         if (timeout >= 100) {
1011                 netdev_warn(dev->net, "timeout on PHY Reset");
1012                 return -EIO;
1013         }
1014
1015         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
1016                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
1017                 ADVERTISE_PAUSE_ASYM);
1018
1019         /* read to clear */
1020         ret = smsc95xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
1021         if (ret < 0) {
1022                 netdev_warn(dev->net, "Failed to read PHY_INT_SRC during init\n");
1023                 return ret;
1024         }
1025
1026         smsc95xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
1027                 PHY_INT_MASK_DEFAULT_);
1028         mii_nway_restart(&dev->mii);
1029
1030         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
1031         return 0;
1032 }
1033
1034 static int smsc95xx_reset(struct usbnet *dev)
1035 {
1036         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1037         u32 read_buf, write_buf, burst_cap;
1038         int ret = 0, timeout;
1039
1040         netif_dbg(dev, ifup, dev->net, "entering smsc95xx_reset\n");
1041
1042         ret = smsc95xx_write_reg(dev, HW_CFG, HW_CFG_LRST_);
1043         if (ret < 0)
1044                 return ret;
1045
1046         timeout = 0;
1047         do {
1048                 msleep(10);
1049                 ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1050                 if (ret < 0)
1051                         return ret;
1052                 timeout++;
1053         } while ((read_buf & HW_CFG_LRST_) && (timeout < 100));
1054
1055         if (timeout >= 100) {
1056                 netdev_warn(dev->net, "timeout waiting for completion of Lite Reset\n");
1057                 return ret;
1058         }
1059
1060         ret = smsc95xx_write_reg(dev, PM_CTRL, PM_CTL_PHY_RST_);
1061         if (ret < 0)
1062                 return ret;
1063
1064         timeout = 0;
1065         do {
1066                 msleep(10);
1067                 ret = smsc95xx_read_reg(dev, PM_CTRL, &read_buf);
1068                 if (ret < 0)
1069                         return ret;
1070                 timeout++;
1071         } while ((read_buf & PM_CTL_PHY_RST_) && (timeout < 100));
1072
1073         if (timeout >= 100) {
1074                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1075                 return ret;
1076         }
1077
1078         ret = smsc95xx_set_mac_address(dev);
1079         if (ret < 0)
1080                 return ret;
1081
1082         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1083                   dev->net->dev_addr);
1084
1085         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1086         if (ret < 0)
1087                 return ret;
1088
1089         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1090                   read_buf);
1091
1092         read_buf |= HW_CFG_BIR_;
1093
1094         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1095         if (ret < 0)
1096                 return ret;
1097
1098         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1099         if (ret < 0)
1100                 return ret;
1101
1102         netif_dbg(dev, ifup, dev->net,
1103                   "Read Value from HW_CFG after writing HW_CFG_BIR_: 0x%08x\n",
1104                   read_buf);
1105
1106         if (!turbo_mode) {
1107                 burst_cap = 0;
1108                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1109         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1110                 burst_cap = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1111                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1112         } else {
1113                 burst_cap = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1114                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1115         }
1116
1117         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1118                   (ulong)dev->rx_urb_size);
1119
1120         ret = smsc95xx_write_reg(dev, BURST_CAP, burst_cap);
1121         if (ret < 0)
1122                 return ret;
1123
1124         ret = smsc95xx_read_reg(dev, BURST_CAP, &read_buf);
1125         if (ret < 0)
1126                 return ret;
1127
1128         netif_dbg(dev, ifup, dev->net,
1129                   "Read Value from BURST_CAP after writing: 0x%08x\n",
1130                   read_buf);
1131
1132         ret = smsc95xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1133         if (ret < 0)
1134                 return ret;
1135
1136         ret = smsc95xx_read_reg(dev, BULK_IN_DLY, &read_buf);
1137         if (ret < 0)
1138                 return ret;
1139
1140         netif_dbg(dev, ifup, dev->net,
1141                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n",
1142                   read_buf);
1143
1144         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1145         if (ret < 0)
1146                 return ret;
1147
1148         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG: 0x%08x\n",
1149                   read_buf);
1150
1151         if (turbo_mode)
1152                 read_buf |= (HW_CFG_MEF_ | HW_CFG_BCE_);
1153
1154         read_buf &= ~HW_CFG_RXDOFF_;
1155
1156         /* set Rx data offset=2, Make IP header aligns on word boundary. */
1157         read_buf |= NET_IP_ALIGN << 9;
1158
1159         ret = smsc95xx_write_reg(dev, HW_CFG, read_buf);
1160         if (ret < 0)
1161                 return ret;
1162
1163         ret = smsc95xx_read_reg(dev, HW_CFG, &read_buf);
1164         if (ret < 0)
1165                 return ret;
1166
1167         netif_dbg(dev, ifup, dev->net,
1168                   "Read Value from HW_CFG after writing: 0x%08x\n", read_buf);
1169
1170         ret = smsc95xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL_);
1171         if (ret < 0)
1172                 return ret;
1173
1174         ret = smsc95xx_read_reg(dev, ID_REV, &read_buf);
1175         if (ret < 0)
1176                 return ret;
1177         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", read_buf);
1178
1179         /* Configure GPIO pins as LED outputs */
1180         write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
1181                 LED_GPIO_CFG_FDX_LED;
1182         ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
1183         if (ret < 0)
1184                 return ret;
1185
1186         /* Init Tx */
1187         ret = smsc95xx_write_reg(dev, FLOW, 0);
1188         if (ret < 0)
1189                 return ret;
1190
1191         ret = smsc95xx_write_reg(dev, AFC_CFG, AFC_CFG_DEFAULT);
1192         if (ret < 0)
1193                 return ret;
1194
1195         /* Don't need mac_cr_lock during initialisation */
1196         ret = smsc95xx_read_reg(dev, MAC_CR, &pdata->mac_cr);
1197         if (ret < 0)
1198                 return ret;
1199
1200         /* Init Rx */
1201         /* Set Vlan */
1202         ret = smsc95xx_write_reg(dev, VLAN1, (u32)ETH_P_8021Q);
1203         if (ret < 0)
1204                 return ret;
1205
1206         /* Enable or disable checksum offload engines */
1207         ret = smsc95xx_set_features(dev->net, dev->net->features);
1208         if (ret < 0) {
1209                 netdev_warn(dev->net, "Failed to set checksum offload features\n");
1210                 return ret;
1211         }
1212
1213         smsc95xx_set_multicast(dev->net);
1214
1215         ret = smsc95xx_phy_initialize(dev);
1216         if (ret < 0) {
1217                 netdev_warn(dev->net, "Failed to init PHY\n");
1218                 return ret;
1219         }
1220
1221         ret = smsc95xx_read_reg(dev, INT_EP_CTL, &read_buf);
1222         if (ret < 0)
1223                 return ret;
1224
1225         /* enable PHY interrupts */
1226         read_buf |= INT_EP_CTL_PHY_INT_;
1227
1228         ret = smsc95xx_write_reg(dev, INT_EP_CTL, read_buf);
1229         if (ret < 0)
1230                 return ret;
1231
1232         ret = smsc95xx_start_tx_path(dev);
1233         if (ret < 0) {
1234                 netdev_warn(dev->net, "Failed to start TX path\n");
1235                 return ret;
1236         }
1237
1238         ret = smsc95xx_start_rx_path(dev, 0);
1239         if (ret < 0) {
1240                 netdev_warn(dev->net, "Failed to start RX path\n");
1241                 return ret;
1242         }
1243
1244         netif_dbg(dev, ifup, dev->net, "smsc95xx_reset, return 0\n");
1245         return 0;
1246 }
1247
1248 static const struct net_device_ops smsc95xx_netdev_ops = {
1249         .ndo_open               = usbnet_open,
1250         .ndo_stop               = usbnet_stop,
1251         .ndo_start_xmit         = usbnet_start_xmit,
1252         .ndo_tx_timeout         = usbnet_tx_timeout,
1253         .ndo_change_mtu         = usbnet_change_mtu,
1254         .ndo_get_stats64        = usbnet_get_stats64,
1255         .ndo_set_mac_address    = eth_mac_addr,
1256         .ndo_validate_addr      = eth_validate_addr,
1257         .ndo_do_ioctl           = smsc95xx_ioctl,
1258         .ndo_set_rx_mode        = smsc95xx_set_multicast,
1259         .ndo_set_features       = smsc95xx_set_features,
1260 };
1261
1262 static int smsc95xx_bind(struct usbnet *dev, struct usb_interface *intf)
1263 {
1264         struct smsc95xx_priv *pdata = NULL;
1265         u32 val;
1266         int ret;
1267
1268         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1269
1270         ret = usbnet_get_endpoints(dev, intf);
1271         if (ret < 0) {
1272                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1273                 return ret;
1274         }
1275
1276         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc95xx_priv),
1277                                               GFP_KERNEL);
1278
1279         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1280         if (!pdata)
1281                 return -ENOMEM;
1282
1283         spin_lock_init(&pdata->mac_cr_lock);
1284
1285         /* LAN95xx devices do not alter the computed checksum of 0 to 0xffff.
1286          * RFC 2460, ipv6 UDP calculated checksum yields a result of zero must
1287          * be changed to 0xffff. RFC 768, ipv4 UDP computed checksum is zero,
1288          * it is transmitted as all ones. The zero transmitted checksum means
1289          * transmitter generated no checksum. Hence, enable csum offload only
1290          * for ipv4 packets.
1291          */
1292         if (DEFAULT_TX_CSUM_ENABLE)
1293                 dev->net->features |= NETIF_F_IP_CSUM;
1294         if (DEFAULT_RX_CSUM_ENABLE)
1295                 dev->net->features |= NETIF_F_RXCSUM;
1296
1297         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
1298
1299         smsc95xx_init_mac_address(dev);
1300
1301         /* Init all registers */
1302         ret = smsc95xx_reset(dev);
1303
1304         /* detect device revision as different features may be available */
1305         ret = smsc95xx_read_reg(dev, ID_REV, &val);
1306         if (ret < 0)
1307                 return ret;
1308         val >>= 16;
1309         pdata->chip_id = val;
1310         pdata->mdix_ctrl = get_mdix_status(dev->net);
1311
1312         if ((val == ID_REV_CHIP_ID_9500A_) || (val == ID_REV_CHIP_ID_9530_) ||
1313             (val == ID_REV_CHIP_ID_89530_) || (val == ID_REV_CHIP_ID_9730_))
1314                 pdata->features = (FEATURE_8_WAKEUP_FILTERS |
1315                         FEATURE_PHY_NLP_CROSSOVER |
1316                         FEATURE_REMOTE_WAKEUP);
1317         else if (val == ID_REV_CHIP_ID_9512_)
1318                 pdata->features = FEATURE_8_WAKEUP_FILTERS;
1319
1320         dev->net->netdev_ops = &smsc95xx_netdev_ops;
1321         dev->net->ethtool_ops = &smsc95xx_ethtool_ops;
1322         dev->net->flags |= IFF_MULTICAST;
1323         dev->net->hard_header_len += SMSC95XX_TX_OVERHEAD_CSUM;
1324         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1325
1326         pdata->dev = dev;
1327         INIT_DELAYED_WORK(&pdata->carrier_check, check_carrier);
1328         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1329
1330         return 0;
1331 }
1332
1333 static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1334 {
1335         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1336
1337         if (pdata) {
1338                 cancel_delayed_work(&pdata->carrier_check);
1339                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1340                 kfree(pdata);
1341                 pdata = NULL;
1342                 dev->data[0] = 0;
1343         }
1344 }
1345
1346 static u32 smsc_crc(const u8 *buffer, size_t len, int filter)
1347 {
1348         u32 crc = bitrev16(crc16(0xFFFF, buffer, len));
1349         return crc << ((filter % 2) * 16);
1350 }
1351
1352 static int smsc95xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1353 {
1354         struct mii_if_info *mii = &dev->mii;
1355         int ret;
1356
1357         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1358
1359         /* read to clear */
1360         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1361         if (ret < 0)
1362                 return ret;
1363
1364         /* enable interrupt source */
1365         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1366         if (ret < 0)
1367                 return ret;
1368
1369         ret |= mask;
1370
1371         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1372
1373         return 0;
1374 }
1375
1376 static int smsc95xx_link_ok_nopm(struct usbnet *dev)
1377 {
1378         struct mii_if_info *mii = &dev->mii;
1379         int ret;
1380
1381         /* first, a dummy read, needed to latch some MII phys */
1382         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1383         if (ret < 0)
1384                 return ret;
1385
1386         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1387         if (ret < 0)
1388                 return ret;
1389
1390         return !!(ret & BMSR_LSTATUS);
1391 }
1392
1393 static int smsc95xx_enter_suspend0(struct usbnet *dev)
1394 {
1395         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1396         u32 val;
1397         int ret;
1398
1399         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1400         if (ret < 0)
1401                 return ret;
1402
1403         val &= (~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_));
1404         val |= PM_CTL_SUS_MODE_0;
1405
1406         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1407         if (ret < 0)
1408                 return ret;
1409
1410         /* clear wol status */
1411         val &= ~PM_CTL_WUPS_;
1412         val |= PM_CTL_WUPS_WOL_;
1413
1414         /* enable energy detection */
1415         if (pdata->wolopts & WAKE_PHY)
1416                 val |= PM_CTL_WUPS_ED_;
1417
1418         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1419         if (ret < 0)
1420                 return ret;
1421
1422         /* read back PM_CTRL */
1423         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1424         if (ret < 0)
1425                 return ret;
1426
1427         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1428
1429         return 0;
1430 }
1431
1432 static int smsc95xx_enter_suspend1(struct usbnet *dev)
1433 {
1434         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1435         struct mii_if_info *mii = &dev->mii;
1436         u32 val;
1437         int ret;
1438
1439         /* reconfigure link pulse detection timing for
1440          * compatibility with non-standard link partners
1441          */
1442         if (pdata->features & FEATURE_PHY_NLP_CROSSOVER)
1443                 smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_EDPD_CONFIG,
1444                         PHY_EDPD_CONFIG_DEFAULT);
1445
1446         /* enable energy detect power-down mode */
1447         ret = smsc95xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS);
1448         if (ret < 0)
1449                 return ret;
1450
1451         ret |= MODE_CTRL_STS_EDPWRDOWN_;
1452
1453         smsc95xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_MODE_CTRL_STS, ret);
1454
1455         /* enter SUSPEND1 mode */
1456         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1457         if (ret < 0)
1458                 return ret;
1459
1460         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1461         val |= PM_CTL_SUS_MODE_1;
1462
1463         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1464         if (ret < 0)
1465                 return ret;
1466
1467         /* clear wol status, enable energy detection */
1468         val &= ~PM_CTL_WUPS_;
1469         val |= (PM_CTL_WUPS_ED_ | PM_CTL_ED_EN_);
1470
1471         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1472         if (ret < 0)
1473                 return ret;
1474
1475         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1476
1477         return 0;
1478 }
1479
1480 static int smsc95xx_enter_suspend2(struct usbnet *dev)
1481 {
1482         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1483         u32 val;
1484         int ret;
1485
1486         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1487         if (ret < 0)
1488                 return ret;
1489
1490         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1491         val |= PM_CTL_SUS_MODE_2;
1492
1493         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1494         if (ret < 0)
1495                 return ret;
1496
1497         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1498
1499         return 0;
1500 }
1501
1502 static int smsc95xx_enter_suspend3(struct usbnet *dev)
1503 {
1504         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1505         u32 val;
1506         int ret;
1507
1508         ret = smsc95xx_read_reg_nopm(dev, RX_FIFO_INF, &val);
1509         if (ret < 0)
1510                 return ret;
1511
1512         if (val & RX_FIFO_INF_USED_) {
1513                 netdev_info(dev->net, "rx fifo not empty in autosuspend\n");
1514                 return -EBUSY;
1515         }
1516
1517         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1518         if (ret < 0)
1519                 return ret;
1520
1521         val &= ~(PM_CTL_SUS_MODE_ | PM_CTL_WUPS_ | PM_CTL_PHY_RST_);
1522         val |= PM_CTL_SUS_MODE_3 | PM_CTL_RES_CLR_WKP_STS;
1523
1524         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1525         if (ret < 0)
1526                 return ret;
1527
1528         /* clear wol status */
1529         val &= ~PM_CTL_WUPS_;
1530         val |= PM_CTL_WUPS_WOL_;
1531
1532         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1533         if (ret < 0)
1534                 return ret;
1535
1536         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1537
1538         return 0;
1539 }
1540
1541 static int smsc95xx_autosuspend(struct usbnet *dev, u32 link_up)
1542 {
1543         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1544         int ret;
1545
1546         if (!netif_running(dev->net)) {
1547                 /* interface is ifconfig down so fully power down hw */
1548                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1549                 return smsc95xx_enter_suspend2(dev);
1550         }
1551
1552         if (!link_up) {
1553                 /* link is down so enter EDPD mode, but only if device can
1554                  * reliably resume from it.  This check should be redundant
1555                  * as current FEATURE_REMOTE_WAKEUP parts also support
1556                  * FEATURE_PHY_NLP_CROSSOVER but it's included for clarity */
1557                 if (!(pdata->features & FEATURE_PHY_NLP_CROSSOVER)) {
1558                         netdev_warn(dev->net, "EDPD not supported\n");
1559                         return -EBUSY;
1560                 }
1561
1562                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1563
1564                 /* enable PHY wakeup events for if cable is attached */
1565                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1566                         PHY_INT_MASK_ANEG_COMP_);
1567                 if (ret < 0) {
1568                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1569                         return ret;
1570                 }
1571
1572                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1573                 return smsc95xx_enter_suspend1(dev);
1574         }
1575
1576         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1577         ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1578                 PHY_INT_MASK_LINK_DOWN_);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1581                 return ret;
1582         }
1583
1584         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1585         return smsc95xx_enter_suspend3(dev);
1586 }
1587
1588 static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message)
1589 {
1590         struct usbnet *dev = usb_get_intfdata(intf);
1591         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
1592         u32 val, link_up;
1593         int ret;
1594
1595         ret = usbnet_suspend(intf, message);
1596         if (ret < 0) {
1597                 netdev_warn(dev->net, "usbnet_suspend error\n");
1598                 return ret;
1599         }
1600
1601         if (pdata->suspend_flags) {
1602                 netdev_warn(dev->net, "error during last resume\n");
1603                 pdata->suspend_flags = 0;
1604         }
1605
1606         /* determine if link is up using only _nopm functions */
1607         link_up = smsc95xx_link_ok_nopm(dev);
1608
1609         if (message.event == PM_EVENT_AUTO_SUSPEND &&
1610             (pdata->features & FEATURE_REMOTE_WAKEUP)) {
1611                 ret = smsc95xx_autosuspend(dev, link_up);
1612                 goto done;
1613         }
1614
1615         /* if we get this far we're not autosuspending */
1616         /* if no wol options set, or if link is down and we're not waking on
1617          * PHY activity, enter lowest power SUSPEND2 mode
1618          */
1619         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1620                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1621                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1622
1623                 /* disable energy detect (link up) & wake up events */
1624                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1625                 if (ret < 0)
1626                         goto done;
1627
1628                 val &= ~(WUCSR_MPEN_ | WUCSR_WAKE_EN_);
1629
1630                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1631                 if (ret < 0)
1632                         goto done;
1633
1634                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1635                 if (ret < 0)
1636                         goto done;
1637
1638                 val &= ~(PM_CTL_ED_EN_ | PM_CTL_WOL_EN_);
1639
1640                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1641                 if (ret < 0)
1642                         goto done;
1643
1644                 ret = smsc95xx_enter_suspend2(dev);
1645                 goto done;
1646         }
1647
1648         if (pdata->wolopts & WAKE_PHY) {
1649                 ret = smsc95xx_enable_phy_wakeup_interrupts(dev,
1650                         (PHY_INT_MASK_ANEG_COMP_ | PHY_INT_MASK_LINK_DOWN_));
1651                 if (ret < 0) {
1652                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1653                         goto done;
1654                 }
1655
1656                 /* if link is down then configure EDPD and enter SUSPEND1,
1657                  * otherwise enter SUSPEND0 below
1658                  */
1659                 if (!link_up) {
1660                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1661                         ret = smsc95xx_enter_suspend1(dev);
1662                         goto done;
1663                 }
1664         }
1665
1666         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1667                 u32 *filter_mask = kcalloc(32, sizeof(u32), GFP_KERNEL);
1668                 u32 command[2];
1669                 u32 offset[2];
1670                 u32 crc[4];
1671                 int wuff_filter_count =
1672                         (pdata->features & FEATURE_8_WAKEUP_FILTERS) ?
1673                         LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM;
1674                 int i, filter = 0;
1675
1676                 if (!filter_mask) {
1677                         netdev_warn(dev->net, "Unable to allocate filter_mask\n");
1678                         ret = -ENOMEM;
1679                         goto done;
1680                 }
1681
1682                 memset(command, 0, sizeof(command));
1683                 memset(offset, 0, sizeof(offset));
1684                 memset(crc, 0, sizeof(crc));
1685
1686                 if (pdata->wolopts & WAKE_BCAST) {
1687                         const u8 bcast[] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
1688                         netdev_info(dev->net, "enabling broadcast detection\n");
1689                         filter_mask[filter * 4] = 0x003F;
1690                         filter_mask[filter * 4 + 1] = 0x00;
1691                         filter_mask[filter * 4 + 2] = 0x00;
1692                         filter_mask[filter * 4 + 3] = 0x00;
1693                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1694                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1695                         crc[filter/2] |= smsc_crc(bcast, 6, filter);
1696                         filter++;
1697                 }
1698
1699                 if (pdata->wolopts & WAKE_MCAST) {
1700                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1701                         netdev_info(dev->net, "enabling multicast detection\n");
1702                         filter_mask[filter * 4] = 0x0007;
1703                         filter_mask[filter * 4 + 1] = 0x00;
1704                         filter_mask[filter * 4 + 2] = 0x00;
1705                         filter_mask[filter * 4 + 3] = 0x00;
1706                         command[filter/4] |= 0x09UL << ((filter % 4) * 8);
1707                         offset[filter/4] |= 0x00  << ((filter % 4) * 8);
1708                         crc[filter/2] |= smsc_crc(mcast, 3, filter);
1709                         filter++;
1710                 }
1711
1712                 if (pdata->wolopts & WAKE_ARP) {
1713                         const u8 arp[] = {0x08, 0x06};
1714                         netdev_info(dev->net, "enabling ARP detection\n");
1715                         filter_mask[filter * 4] = 0x0003;
1716                         filter_mask[filter * 4 + 1] = 0x00;
1717                         filter_mask[filter * 4 + 2] = 0x00;
1718                         filter_mask[filter * 4 + 3] = 0x00;
1719                         command[filter/4] |= 0x05UL << ((filter % 4) * 8);
1720                         offset[filter/4] |= 0x0C << ((filter % 4) * 8);
1721                         crc[filter/2] |= smsc_crc(arp, 2, filter);
1722                         filter++;
1723                 }
1724
1725                 if (pdata->wolopts & WAKE_UCAST) {
1726                         netdev_info(dev->net, "enabling unicast detection\n");
1727                         filter_mask[filter * 4] = 0x003F;
1728                         filter_mask[filter * 4 + 1] = 0x00;
1729                         filter_mask[filter * 4 + 2] = 0x00;
1730                         filter_mask[filter * 4 + 3] = 0x00;
1731                         command[filter/4] |= 0x01UL << ((filter % 4) * 8);
1732                         offset[filter/4] |= 0x00 << ((filter % 4) * 8);
1733                         crc[filter/2] |= smsc_crc(dev->net->dev_addr, ETH_ALEN, filter);
1734                         filter++;
1735                 }
1736
1737                 for (i = 0; i < (wuff_filter_count * 4); i++) {
1738                         ret = smsc95xx_write_reg_nopm(dev, WUFF, filter_mask[i]);
1739                         if (ret < 0) {
1740                                 kfree(filter_mask);
1741                                 goto done;
1742                         }
1743                 }
1744                 kfree(filter_mask);
1745
1746                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1747                         ret = smsc95xx_write_reg_nopm(dev, WUFF, command[i]);
1748                         if (ret < 0)
1749                                 goto done;
1750                 }
1751
1752                 for (i = 0; i < (wuff_filter_count / 4); i++) {
1753                         ret = smsc95xx_write_reg_nopm(dev, WUFF, offset[i]);
1754                         if (ret < 0)
1755                                 goto done;
1756                 }
1757
1758                 for (i = 0; i < (wuff_filter_count / 2); i++) {
1759                         ret = smsc95xx_write_reg_nopm(dev, WUFF, crc[i]);
1760                         if (ret < 0)
1761                                 goto done;
1762                 }
1763
1764                 /* clear any pending pattern match packet status */
1765                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1766                 if (ret < 0)
1767                         goto done;
1768
1769                 val |= WUCSR_WUFR_;
1770
1771                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1772                 if (ret < 0)
1773                         goto done;
1774         }
1775
1776         if (pdata->wolopts & WAKE_MAGIC) {
1777                 /* clear any pending magic packet status */
1778                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1779                 if (ret < 0)
1780                         goto done;
1781
1782                 val |= WUCSR_MPR_;
1783
1784                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1785                 if (ret < 0)
1786                         goto done;
1787         }
1788
1789         /* enable/disable wakeup sources */
1790         ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1791         if (ret < 0)
1792                 goto done;
1793
1794         if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) {
1795                 netdev_info(dev->net, "enabling pattern match wakeup\n");
1796                 val |= WUCSR_WAKE_EN_;
1797         } else {
1798                 netdev_info(dev->net, "disabling pattern match wakeup\n");
1799                 val &= ~WUCSR_WAKE_EN_;
1800         }
1801
1802         if (pdata->wolopts & WAKE_MAGIC) {
1803                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1804                 val |= WUCSR_MPEN_;
1805         } else {
1806                 netdev_info(dev->net, "disabling magic packet wakeup\n");
1807                 val &= ~WUCSR_MPEN_;
1808         }
1809
1810         ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1811         if (ret < 0)
1812                 goto done;
1813
1814         /* enable wol wakeup source */
1815         ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1816         if (ret < 0)
1817                 goto done;
1818
1819         val |= PM_CTL_WOL_EN_;
1820
1821         /* phy energy detect wakeup source */
1822         if (pdata->wolopts & WAKE_PHY)
1823                 val |= PM_CTL_ED_EN_;
1824
1825         ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1826         if (ret < 0)
1827                 goto done;
1828
1829         /* enable receiver to enable frame reception */
1830         smsc95xx_start_rx_path(dev, 1);
1831
1832         /* some wol options are enabled, so enter SUSPEND0 */
1833         netdev_info(dev->net, "entering SUSPEND0 mode\n");
1834         ret = smsc95xx_enter_suspend0(dev);
1835
1836 done:
1837         /*
1838          * TODO: resume() might need to handle the suspend failure
1839          * in system sleep
1840          */
1841         if (ret && PMSG_IS_AUTO(message))
1842                 usbnet_resume(intf);
1843         return ret;
1844 }
1845
1846 static int smsc95xx_resume(struct usb_interface *intf)
1847 {
1848         struct usbnet *dev = usb_get_intfdata(intf);
1849         struct smsc95xx_priv *pdata;
1850         u8 suspend_flags;
1851         int ret;
1852         u32 val;
1853
1854         BUG_ON(!dev);
1855         pdata = (struct smsc95xx_priv *)(dev->data[0]);
1856         suspend_flags = pdata->suspend_flags;
1857
1858         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
1859
1860         /* do this first to ensure it's cleared even in error case */
1861         pdata->suspend_flags = 0;
1862         schedule_delayed_work(&pdata->carrier_check, CARRIER_CHECK_DELAY);
1863
1864         if (suspend_flags & SUSPEND_ALLMODES) {
1865                 /* clear wake-up sources */
1866                 ret = smsc95xx_read_reg_nopm(dev, WUCSR, &val);
1867                 if (ret < 0)
1868                         return ret;
1869
1870                 val &= ~(WUCSR_WAKE_EN_ | WUCSR_MPEN_);
1871
1872                 ret = smsc95xx_write_reg_nopm(dev, WUCSR, val);
1873                 if (ret < 0)
1874                         return ret;
1875
1876                 /* clear wake-up status */
1877                 ret = smsc95xx_read_reg_nopm(dev, PM_CTRL, &val);
1878                 if (ret < 0)
1879                         return ret;
1880
1881                 val &= ~PM_CTL_WOL_EN_;
1882                 val |= PM_CTL_WUPS_;
1883
1884                 ret = smsc95xx_write_reg_nopm(dev, PM_CTRL, val);
1885                 if (ret < 0)
1886                         return ret;
1887         }
1888
1889         ret = usbnet_resume(intf);
1890         if (ret < 0)
1891                 netdev_warn(dev->net, "usbnet_resume error\n");
1892
1893         return ret;
1894 }
1895
1896 static int smsc95xx_reset_resume(struct usb_interface *intf)
1897 {
1898         struct usbnet *dev = usb_get_intfdata(intf);
1899         int ret;
1900
1901         ret = smsc95xx_reset(dev);
1902         if (ret < 0)
1903                 return ret;
1904
1905         return smsc95xx_resume(intf);
1906 }
1907
1908 static void smsc95xx_rx_csum_offload(struct sk_buff *skb)
1909 {
1910         skb->csum = *(u16 *)(skb_tail_pointer(skb) - 2);
1911         skb->ip_summed = CHECKSUM_COMPLETE;
1912         skb_trim(skb, skb->len - 2);
1913 }
1914
1915 static int smsc95xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1916 {
1917         /* This check is no longer done by usbnet */
1918         if (skb->len < dev->net->hard_header_len)
1919                 return 0;
1920
1921         while (skb->len > 0) {
1922                 u32 header, align_count;
1923                 struct sk_buff *ax_skb;
1924                 unsigned char *packet;
1925                 u16 size;
1926
1927                 memcpy(&header, skb->data, sizeof(header));
1928                 le32_to_cpus(&header);
1929                 skb_pull(skb, 4 + NET_IP_ALIGN);
1930                 packet = skb->data;
1931
1932                 /* get the packet length */
1933                 size = (u16)((header & RX_STS_FL_) >> 16);
1934                 align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4;
1935
1936                 if (unlikely(header & RX_STS_ES_)) {
1937                         netif_dbg(dev, rx_err, dev->net,
1938                                   "Error header=0x%08x\n", header);
1939                         dev->net->stats.rx_errors++;
1940                         dev->net->stats.rx_dropped++;
1941
1942                         if (header & RX_STS_CRC_) {
1943                                 dev->net->stats.rx_crc_errors++;
1944                         } else {
1945                                 if (header & (RX_STS_TL_ | RX_STS_RF_))
1946                                         dev->net->stats.rx_frame_errors++;
1947
1948                                 if ((header & RX_STS_LE_) &&
1949                                         (!(header & RX_STS_FT_)))
1950                                         dev->net->stats.rx_length_errors++;
1951                         }
1952                 } else {
1953                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1954                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1955                                 netif_dbg(dev, rx_err, dev->net,
1956                                           "size err header=0x%08x\n", header);
1957                                 return 0;
1958                         }
1959
1960                         /* last frame in this batch */
1961                         if (skb->len == size) {
1962                                 if (dev->net->features & NETIF_F_RXCSUM)
1963                                         smsc95xx_rx_csum_offload(skb);
1964                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1965                                 skb->truesize = size + sizeof(struct sk_buff);
1966
1967                                 return 1;
1968                         }
1969
1970                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1971                         if (unlikely(!ax_skb)) {
1972                                 netdev_warn(dev->net, "Error allocating skb\n");
1973                                 return 0;
1974                         }
1975
1976                         ax_skb->len = size;
1977                         ax_skb->data = packet;
1978                         skb_set_tail_pointer(ax_skb, size);
1979
1980                         if (dev->net->features & NETIF_F_RXCSUM)
1981                                 smsc95xx_rx_csum_offload(ax_skb);
1982                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1983                         ax_skb->truesize = size + sizeof(struct sk_buff);
1984
1985                         usbnet_skb_return(dev, ax_skb);
1986                 }
1987
1988                 skb_pull(skb, size);
1989
1990                 /* padding bytes before the next frame starts */
1991                 if (skb->len)
1992                         skb_pull(skb, align_count);
1993         }
1994
1995         return 1;
1996 }
1997
1998 static u32 smsc95xx_calc_csum_preamble(struct sk_buff *skb)
1999 {
2000         u16 low_16 = (u16)skb_checksum_start_offset(skb);
2001         u16 high_16 = low_16 + skb->csum_offset;
2002         return (high_16 << 16) | low_16;
2003 }
2004
2005 static struct sk_buff *smsc95xx_tx_fixup(struct usbnet *dev,
2006                                          struct sk_buff *skb, gfp_t flags)
2007 {
2008         bool csum = skb->ip_summed == CHECKSUM_PARTIAL;
2009         int overhead = csum ? SMSC95XX_TX_OVERHEAD_CSUM : SMSC95XX_TX_OVERHEAD;
2010         u32 tx_cmd_a, tx_cmd_b;
2011
2012         /* We do not advertise SG, so skbs should be already linearized */
2013         BUG_ON(skb_shinfo(skb)->nr_frags);
2014
2015         /* Make writable and expand header space by overhead if required */
2016         if (skb_cow_head(skb, overhead)) {
2017                 /* Must deallocate here as returning NULL to indicate error
2018                  * means the skb won't be deallocated in the caller.
2019                  */
2020                 dev_kfree_skb_any(skb);
2021                 return NULL;
2022         }
2023
2024         if (csum) {
2025                 if (skb->len <= 45) {
2026                         /* workaround - hardware tx checksum does not work
2027                          * properly with extremely small packets */
2028                         long csstart = skb_checksum_start_offset(skb);
2029                         __wsum calc = csum_partial(skb->data + csstart,
2030                                 skb->len - csstart, 0);
2031                         *((__sum16 *)(skb->data + csstart
2032                                 + skb->csum_offset)) = csum_fold(calc);
2033
2034                         csum = false;
2035                 } else {
2036                         u32 csum_preamble = smsc95xx_calc_csum_preamble(skb);
2037                         skb_push(skb, 4);
2038                         cpu_to_le32s(&csum_preamble);
2039                         memcpy(skb->data, &csum_preamble, 4);
2040                 }
2041         }
2042
2043         skb_push(skb, 4);
2044         tx_cmd_b = (u32)(skb->len - 4);
2045         if (csum)
2046                 tx_cmd_b |= TX_CMD_B_CSUM_ENABLE;
2047         cpu_to_le32s(&tx_cmd_b);
2048         memcpy(skb->data, &tx_cmd_b, 4);
2049
2050         skb_push(skb, 4);
2051         tx_cmd_a = (u32)(skb->len - 8) | TX_CMD_A_FIRST_SEG_ |
2052                 TX_CMD_A_LAST_SEG_;
2053         cpu_to_le32s(&tx_cmd_a);
2054         memcpy(skb->data, &tx_cmd_a, 4);
2055
2056         return skb;
2057 }
2058
2059 static int smsc95xx_manage_power(struct usbnet *dev, int on)
2060 {
2061         struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
2062
2063         dev->intf->needs_remote_wakeup = on;
2064
2065         if (pdata->features & FEATURE_REMOTE_WAKEUP)
2066                 return 0;
2067
2068         /* this chip revision isn't capable of remote wakeup */
2069         netdev_info(dev->net, "hardware isn't capable of remote wakeup\n");
2070
2071         if (on)
2072                 usb_autopm_get_interface_no_resume(dev->intf);
2073         else
2074                 usb_autopm_put_interface(dev->intf);
2075
2076         return 0;
2077 }
2078
2079 static const struct driver_info smsc95xx_info = {
2080         .description    = "smsc95xx USB 2.0 Ethernet",
2081         .bind           = smsc95xx_bind,
2082         .unbind         = smsc95xx_unbind,
2083         .link_reset     = smsc95xx_link_reset,
2084         .reset          = smsc95xx_reset,
2085         .rx_fixup       = smsc95xx_rx_fixup,
2086         .tx_fixup       = smsc95xx_tx_fixup,
2087         .status         = smsc95xx_status,
2088         .manage_power   = smsc95xx_manage_power,
2089         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2090 };
2091
2092 static const struct usb_device_id products[] = {
2093         {
2094                 /* SMSC9500 USB Ethernet Device */
2095                 USB_DEVICE(0x0424, 0x9500),
2096                 .driver_info = (unsigned long) &smsc95xx_info,
2097         },
2098         {
2099                 /* SMSC9505 USB Ethernet Device */
2100                 USB_DEVICE(0x0424, 0x9505),
2101                 .driver_info = (unsigned long) &smsc95xx_info,
2102         },
2103         {
2104                 /* SMSC9500A USB Ethernet Device */
2105                 USB_DEVICE(0x0424, 0x9E00),
2106                 .driver_info = (unsigned long) &smsc95xx_info,
2107         },
2108         {
2109                 /* SMSC9505A USB Ethernet Device */
2110                 USB_DEVICE(0x0424, 0x9E01),
2111                 .driver_info = (unsigned long) &smsc95xx_info,
2112         },
2113         {
2114                 /* SMSC9512/9514 USB Hub & Ethernet Device */
2115                 USB_DEVICE(0x0424, 0xec00),
2116                 .driver_info = (unsigned long) &smsc95xx_info,
2117         },
2118         {
2119                 /* SMSC9500 USB Ethernet Device (SAL10) */
2120                 USB_DEVICE(0x0424, 0x9900),
2121                 .driver_info = (unsigned long) &smsc95xx_info,
2122         },
2123         {
2124                 /* SMSC9505 USB Ethernet Device (SAL10) */
2125                 USB_DEVICE(0x0424, 0x9901),
2126                 .driver_info = (unsigned long) &smsc95xx_info,
2127         },
2128         {
2129                 /* SMSC9500A USB Ethernet Device (SAL10) */
2130                 USB_DEVICE(0x0424, 0x9902),
2131                 .driver_info = (unsigned long) &smsc95xx_info,
2132         },
2133         {
2134                 /* SMSC9505A USB Ethernet Device (SAL10) */
2135                 USB_DEVICE(0x0424, 0x9903),
2136                 .driver_info = (unsigned long) &smsc95xx_info,
2137         },
2138         {
2139                 /* SMSC9512/9514 USB Hub & Ethernet Device (SAL10) */
2140                 USB_DEVICE(0x0424, 0x9904),
2141                 .driver_info = (unsigned long) &smsc95xx_info,
2142         },
2143         {
2144                 /* SMSC9500A USB Ethernet Device (HAL) */
2145                 USB_DEVICE(0x0424, 0x9905),
2146                 .driver_info = (unsigned long) &smsc95xx_info,
2147         },
2148         {
2149                 /* SMSC9505A USB Ethernet Device (HAL) */
2150                 USB_DEVICE(0x0424, 0x9906),
2151                 .driver_info = (unsigned long) &smsc95xx_info,
2152         },
2153         {
2154                 /* SMSC9500 USB Ethernet Device (Alternate ID) */
2155                 USB_DEVICE(0x0424, 0x9907),
2156                 .driver_info = (unsigned long) &smsc95xx_info,
2157         },
2158         {
2159                 /* SMSC9500A USB Ethernet Device (Alternate ID) */
2160                 USB_DEVICE(0x0424, 0x9908),
2161                 .driver_info = (unsigned long) &smsc95xx_info,
2162         },
2163         {
2164                 /* SMSC9512/9514 USB Hub & Ethernet Device (Alternate ID) */
2165                 USB_DEVICE(0x0424, 0x9909),
2166                 .driver_info = (unsigned long) &smsc95xx_info,
2167         },
2168         {
2169                 /* SMSC LAN9530 USB Ethernet Device */
2170                 USB_DEVICE(0x0424, 0x9530),
2171                 .driver_info = (unsigned long) &smsc95xx_info,
2172         },
2173         {
2174                 /* SMSC LAN9730 USB Ethernet Device */
2175                 USB_DEVICE(0x0424, 0x9730),
2176                 .driver_info = (unsigned long) &smsc95xx_info,
2177         },
2178         {
2179                 /* SMSC LAN89530 USB Ethernet Device */
2180                 USB_DEVICE(0x0424, 0x9E08),
2181                 .driver_info = (unsigned long) &smsc95xx_info,
2182         },
2183         { },            /* END */
2184 };
2185 MODULE_DEVICE_TABLE(usb, products);
2186
2187 static struct usb_driver smsc95xx_driver = {
2188         .name           = "smsc95xx",
2189         .id_table       = products,
2190         .probe          = usbnet_probe,
2191         .suspend        = smsc95xx_suspend,
2192         .resume         = smsc95xx_resume,
2193         .reset_resume   = smsc95xx_reset_resume,
2194         .disconnect     = usbnet_disconnect,
2195         .disable_hub_initiated_lpm = 1,
2196         .supports_autosuspend = 1,
2197 };
2198
2199 module_usb_driver(smsc95xx_driver);
2200
2201 MODULE_AUTHOR("Nancy Lin");
2202 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2203 MODULE_DESCRIPTION("SMSC95XX USB 2.0 Ethernet Devices");
2204 MODULE_LICENSE("GPL");