drivers/net/usb/smsc75xx.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2  /***************************************************************************
   3  *
   4  * Copyright (C) 2007-2010 SMSC
   5  *
   6  *****************************************************************************/
   7
   8 #include <linux/module.h>
   9 #include <linux/kmod.h>
  10 #include <linux/netdevice.h>
  11 #include <linux/etherdevice.h>
  12 #include <linux/ethtool.h>
  13 #include <linux/mii.h>
  14 #include <linux/usb.h>
  15 #include <linux/bitrev.h>
  16 #include <linux/crc16.h>
  17 #include <linux/crc32.h>
  18 #include <linux/usb/usbnet.h>
  19 #include <linux/slab.h>
  20 #include <linux/of_net.h>
  21 #include "smsc75xx.h"
  22
  23 #define SMSC_CHIPNAME                   "smsc75xx"
  24 #define SMSC_DRIVER_VERSION             "1.0.0"
  25 #define HS_USB_PKT_SIZE                 (512)
  26 #define FS_USB_PKT_SIZE                 (64)
  27 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  28 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  29 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  30 #define MAX_SINGLE_PACKET_SIZE          (9000)
  31 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  32 #define EEPROM_MAC_OFFSET               (0x01)
  33 #define DEFAULT_TX_CSUM_ENABLE          (true)
  34 #define DEFAULT_RX_CSUM_ENABLE          (true)
  35 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  36 #define SMSC75XX_TX_OVERHEAD            (8)
  37 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  38 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  39 #define USB_VENDOR_ID_SMSC              (0x0424)
  40 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  41 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  42 #define RXW_PADDING                     2
  43 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  44                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  45
  46 #define SUSPEND_SUSPEND0                (0x01)
  47 #define SUSPEND_SUSPEND1                (0x02)
  48 #define SUSPEND_SUSPEND2                (0x04)
  49 #define SUSPEND_SUSPEND3                (0x08)
  50 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  51                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  52
  53 struct smsc75xx_priv {
  54         struct usbnet *dev;
  55         u32 rfe_ctl;
  56         u32 wolopts;
  57         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  58         struct mutex dataport_mutex;
  59         spinlock_t rfe_ctl_lock;
  60         struct work_struct set_multicast;
  61         u8 suspend_flags;
  62 };
  63
  64 struct usb_context {
  65         struct usb_ctrlrequest req;
  66         struct usbnet *dev;
  67 };
  68
  69 static bool turbo_mode = true;
  70 module_param(turbo_mode, bool, 0644);
  71 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  72
  73 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  74 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  75
  76 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  77                                             u32 *data, int in_pm)
  78 {
  79         u32 buf;
  80         int ret;
  81         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  82
  83         BUG_ON(!dev);
  84
  85         if (!in_pm)
  86                 fn = usbnet_read_cmd;
  87         else
  88                 fn = usbnet_read_cmd_nopm;
  89
  90         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  91                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  92                  0, index, &buf, 4);
  93         if (unlikely(ret < 4)) {
  94                 ret = ret < 0 ? ret : -ENODATA;
  95
  96                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  97                             index, ret);
  98                 return ret;
  99         }
 100
 101         le32_to_cpus(&buf);
 102         *data = buf;
 103
 104         return ret;
 105 }
 106
 107 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 108                                              u32 data, int in_pm)
 109 {
 110         u32 buf;
 111         int ret;
 112         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 113
 114         BUG_ON(!dev);
 115
 116         if (!in_pm)
 117                 fn = usbnet_write_cmd;
 118         else
 119                 fn = usbnet_write_cmd_nopm;
 120
 121         buf = data;
 122         cpu_to_le32s(&buf);
 123
 124         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 125                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 126                  0, index, &buf, 4);
 127         if (unlikely(ret < 0))
 128                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 129                             index, ret);
 130
 131         return ret;
 132 }
 133
 134 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 135                                                u32 *data)
 136 {
 137         return __smsc75xx_read_reg(dev, index, data, 1);
 138 }
 139
 140 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 141                                                 u32 data)
 142 {
 143         return __smsc75xx_write_reg(dev, index, data, 1);
 144 }
 145
 146 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 147                                           u32 *data)
 148 {
 149         return __smsc75xx_read_reg(dev, index, data, 0);
 150 }
 151
 152 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 153                                            u32 data)
 154 {
 155         return __smsc75xx_write_reg(dev, index, data, 0);
 156 }
 157
 158 /* Loop until the read is completed with timeout
 159  * called with phy_mutex held */
 160 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 161                                                      int in_pm)
 162 {
 163         unsigned long start_time = jiffies;
 164         u32 val;
 165         int ret;
 166
 167         do {
 168                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 169                 if (ret < 0) {
 170                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 171                         return ret;
 172                 }
 173
 174                 if (!(val & MII_ACCESS_BUSY))
 175                         return 0;
 176         } while (!time_after(jiffies, start_time + HZ));
 177
 178         return -EIO;
 179 }
 180
 181 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 182                                 int in_pm)
 183 {
 184         struct usbnet *dev = netdev_priv(netdev);
 185         u32 val, addr;
 186         int ret;
 187
 188         mutex_lock(&dev->phy_mutex);
 189
 190         /* confirm MII not busy */
 191         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 192         if (ret < 0) {
 193                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 194                 goto done;
 195         }
 196
 197         /* set the address, index & direction (read from PHY) */
 198         phy_id &= dev->mii.phy_id_mask;
 199         idx &= dev->mii.reg_num_mask;
 200         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 201                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 202                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 203         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 204         if (ret < 0) {
 205                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 206                 goto done;
 207         }
 208
 209         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 210         if (ret < 0) {
 211                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 212                 goto done;
 213         }
 214
 215         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 216         if (ret < 0) {
 217                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 218                 goto done;
 219         }
 220
 221         ret = (u16)(val & 0xFFFF);
 222
 223 done:
 224         mutex_unlock(&dev->phy_mutex);
 225         return ret;
 226 }
 227
 228 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 229                                   int idx, int regval, int in_pm)
 230 {
 231         struct usbnet *dev = netdev_priv(netdev);
 232         u32 val, addr;
 233         int ret;
 234
 235         mutex_lock(&dev->phy_mutex);
 236
 237         /* confirm MII not busy */
 238         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 239         if (ret < 0) {
 240                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 241                 goto done;
 242         }
 243
 244         val = regval;
 245         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 246         if (ret < 0) {
 247                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 248                 goto done;
 249         }
 250
 251         /* set the address, index & direction (write to PHY) */
 252         phy_id &= dev->mii.phy_id_mask;
 253         idx &= dev->mii.reg_num_mask;
 254         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 255                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 256                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 257         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 258         if (ret < 0) {
 259                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 260                 goto done;
 261         }
 262
 263         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 264         if (ret < 0) {
 265                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 266                 goto done;
 267         }
 268
 269 done:
 270         mutex_unlock(&dev->phy_mutex);
 271 }
 272
 273 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 274                                    int idx)
 275 {
 276         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 277 }
 278
 279 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 280                                      int idx, int regval)
 281 {
 282         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 283 }
 284
 285 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 286 {
 287         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 288 }
 289
 290 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 291                                 int regval)
 292 {
 293         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 294 }
 295
 296 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 297 {
 298         unsigned long start_time = jiffies;
 299         u32 val;
 300         int ret;
 301
 302         do {
 303                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 304                 if (ret < 0) {
 305                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 306                         return ret;
 307                 }
 308
 309                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 310                         break;
 311                 udelay(40);
 312         } while (!time_after(jiffies, start_time + HZ));
 313
 314         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 315                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 316                 return -EIO;
 317         }
 318
 319         return 0;
 320 }
 321
 322 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 323 {
 324         unsigned long start_time = jiffies;
 325         u32 val;
 326         int ret;
 327
 328         do {
 329                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 330                 if (ret < 0) {
 331                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 332                         return ret;
 333                 }
 334
 335                 if (!(val & E2P_CMD_BUSY))
 336                         return 0;
 337
 338                 udelay(40);
 339         } while (!time_after(jiffies, start_time + HZ));
 340
 341         netdev_warn(dev->net, "EEPROM is busy\n");
 342         return -EIO;
 343 }
 344
 345 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 346                                 u8 *data)
 347 {
 348         u32 val;
 349         int i, ret;
 350
 351         BUG_ON(!dev);
 352         BUG_ON(!data);
 353
 354         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 355         if (ret)
 356                 return ret;
 357
 358         for (i = 0; i < length; i++) {
 359                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 360                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 361                 if (ret < 0) {
 362                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 363                         return ret;
 364                 }
 365
 366                 ret = smsc75xx_wait_eeprom(dev);
 367                 if (ret < 0)
 368                         return ret;
 369
 370                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 371                 if (ret < 0) {
 372                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 373                         return ret;
 374                 }
 375
 376                 data[i] = val & 0xFF;
 377                 offset++;
 378         }
 379
 380         return 0;
 381 }
 382
 383 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 384                                  u8 *data)
 385 {
 386         u32 val;
 387         int i, ret;
 388
 389         BUG_ON(!dev);
 390         BUG_ON(!data);
 391
 392         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 393         if (ret)
 394                 return ret;
 395
 396         /* Issue write/erase enable command */
 397         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 398         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 399         if (ret < 0) {
 400                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 401                 return ret;
 402         }
 403
 404         ret = smsc75xx_wait_eeprom(dev);
 405         if (ret < 0)
 406                 return ret;
 407
 408         for (i = 0; i < length; i++) {
 409
 410                 /* Fill data register */
 411                 val = data[i];
 412                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 413                 if (ret < 0) {
 414                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 415                         return ret;
 416                 }
 417
 418                 /* Send "write" command */
 419                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 420                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 421                 if (ret < 0) {
 422                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 423                         return ret;
 424                 }
 425
 426                 ret = smsc75xx_wait_eeprom(dev);
 427                 if (ret < 0)
 428                         return ret;
 429
 430                 offset++;
 431         }
 432
 433         return 0;
 434 }
 435
 436 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 437 {
 438         int i, ret;
 439
 440         for (i = 0; i < 100; i++) {
 441                 u32 dp_sel;
 442                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 443                 if (ret < 0) {
 444                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 445                         return ret;
 446                 }
 447
 448                 if (dp_sel & DP_SEL_DPRDY)
 449                         return 0;
 450
 451                 udelay(40);
 452         }
 453
 454         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 455
 456         return -EIO;
 457 }
 458
 459 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 460                                    u32 length, u32 *buf)
 461 {
 462         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 463         u32 dp_sel;
 464         int i, ret;
 465
 466         mutex_lock(&pdata->dataport_mutex);
 467
 468         ret = smsc75xx_dataport_wait_not_busy(dev);
 469         if (ret < 0) {
 470                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 471                 goto done;
 472         }
 473
 474         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 475         if (ret < 0) {
 476                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 477                 goto done;
 478         }
 479
 480         dp_sel &= ~DP_SEL_RSEL;
 481         dp_sel |= ram_select;
 482         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 483         if (ret < 0) {
 484                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 485                 goto done;
 486         }
 487
 488         for (i = 0; i < length; i++) {
 489                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 490                 if (ret < 0) {
 491                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 492                         goto done;
 493                 }
 494
 495                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 496                 if (ret < 0) {
 497                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 498                         goto done;
 499                 }
 500
 501                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 502                 if (ret < 0) {
 503                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 504                         goto done;
 505                 }
 506
 507                 ret = smsc75xx_dataport_wait_not_busy(dev);
 508                 if (ret < 0) {
 509                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 510                         goto done;
 511                 }
 512         }
 513
 514 done:
 515         mutex_unlock(&pdata->dataport_mutex);
 516         return ret;
 517 }
 518
 519 /* returns hash bit number for given MAC address */
 520 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 521 {
 522         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 523 }
 524
 525 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 526 {
 527         struct smsc75xx_priv *pdata =
 528                 container_of(param, struct smsc75xx_priv, set_multicast);
 529         struct usbnet *dev = pdata->dev;
 530         int ret;
 531
 532         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 533                   pdata->rfe_ctl);
 534
 535         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 536                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 537
 538         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 539         if (ret < 0)
 540                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 541 }
 542
 543 static void smsc75xx_set_multicast(struct net_device *netdev)
 544 {
 545         struct usbnet *dev = netdev_priv(netdev);
 546         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 547         unsigned long flags;
 548         int i;
 549
 550         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 551
 552         pdata->rfe_ctl &=
 553                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 554         pdata->rfe_ctl |= RFE_CTL_AB;
 555
 556         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 557                 pdata->multicast_hash_table[i] = 0;
 558
 559         if (dev->net->flags & IFF_PROMISC) {
 560                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 561                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 562         } else if (dev->net->flags & IFF_ALLMULTI) {
 563                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 564                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 565         } else if (!netdev_mc_empty(dev->net)) {
 566                 struct netdev_hw_addr *ha;
 567
 568                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 569
 570                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 571
 572                 netdev_for_each_mc_addr(ha, netdev) {
 573                         u32 bitnum = smsc75xx_hash(ha->addr);
 574                         pdata->multicast_hash_table[bitnum / 32] |=
 575                                 (1 << (bitnum % 32));
 576                 }
 577         } else {
 578                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 579                 pdata->rfe_ctl |= RFE_CTL_DPF;
 580         }
 581
 582         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 583
 584         /* defer register writes to a sleepable context */
 585         schedule_work(&pdata->set_multicast);
 586 }
 587
 588 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 589                                             u16 lcladv, u16 rmtadv)
 590 {
 591         u32 flow = 0, fct_flow = 0;
 592         int ret;
 593
 594         if (duplex == DUPLEX_FULL) {
 595                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 596
 597                 if (cap & FLOW_CTRL_TX) {
 598                         flow = (FLOW_TX_FCEN | 0xFFFF);
 599                         /* set fct_flow thresholds to 20% and 80% */
 600                         fct_flow = (8 << 8) | 32;
 601                 }
 602
 603                 if (cap & FLOW_CTRL_RX)
 604                         flow |= FLOW_RX_FCEN;
 605
 606                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 607                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 608                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 609         } else {
 610                 netif_dbg(dev, link, dev->net, "half duplex\n");
 611         }
 612
 613         ret = smsc75xx_write_reg(dev, FLOW, flow);
 614         if (ret < 0) {
 615                 netdev_warn(dev->net, "Error writing FLOW\n");
 616                 return ret;
 617         }
 618
 619         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 620         if (ret < 0) {
 621                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 622                 return ret;
 623         }
 624
 625         return 0;
 626 }
 627
 628 static int smsc75xx_link_reset(struct usbnet *dev)
 629 {
 630         struct mii_if_info *mii = &dev->mii;
 631         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 632         u16 lcladv, rmtadv;
 633         int ret;
 634
 635         /* write to clear phy interrupt status */
 636         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 637                 PHY_INT_SRC_CLEAR_ALL);
 638
 639         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 640         if (ret < 0) {
 641                 netdev_warn(dev->net, "Error writing INT_STS\n");
 642                 return ret;
 643         }
 644
 645         mii_check_media(mii, 1, 1);
 646         mii_ethtool_gset(&dev->mii, &ecmd);
 647         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 648         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 649
 650         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 651                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 652
 653         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 654 }
 655
 656 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 657 {
 658         u32 intdata;
 659
 660         if (urb->actual_length != 4) {
 661                 netdev_warn(dev->net, "unexpected urb length %d\n",
 662                             urb->actual_length);
 663                 return;
 664         }
 665
 666         intdata = get_unaligned_le32(urb->transfer_buffer);
 667
 668         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 669
 670         if (intdata & INT_ENP_PHY_INT)
 671                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 672         else
 673                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 674                             intdata);
 675 }
 676
 677 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 678 {
 679         return MAX_EEPROM_SIZE;
 680 }
 681
 682 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 683                                        struct ethtool_eeprom *ee, u8 *data)
 684 {
 685         struct usbnet *dev = netdev_priv(netdev);
 686
 687         ee->magic = LAN75XX_EEPROM_MAGIC;
 688
 689         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 690 }
 691
 692 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 693                                        struct ethtool_eeprom *ee, u8 *data)
 694 {
 695         struct usbnet *dev = netdev_priv(netdev);
 696
 697         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 698                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 699                             ee->magic);
 700                 return -EINVAL;
 701         }
 702
 703         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 704 }
 705
 706 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 707                                      struct ethtool_wolinfo *wolinfo)
 708 {
 709         struct usbnet *dev = netdev_priv(net);
 710         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 711
 712         wolinfo->supported = SUPPORTED_WAKE;
 713         wolinfo->wolopts = pdata->wolopts;
 714 }
 715
 716 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 717                                     struct ethtool_wolinfo *wolinfo)
 718 {
 719         struct usbnet *dev = netdev_priv(net);
 720         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 721         int ret;
 722
 723         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 724                 return -EINVAL;
 725
 726         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 727
 728         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 729         if (ret < 0)
 730                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 731
 732         return ret;
 733 }
 734
 735 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 736         .get_link       = usbnet_get_link,
 737         .nway_reset     = usbnet_nway_reset,
 738         .get_drvinfo    = usbnet_get_drvinfo,
 739         .get_msglevel   = usbnet_get_msglevel,
 740         .set_msglevel   = usbnet_set_msglevel,
 741         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 742         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 743         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 744         .get_wol        = smsc75xx_ethtool_get_wol,
 745         .set_wol        = smsc75xx_ethtool_set_wol,
 746         .get_link_ksettings     = usbnet_get_link_ksettings,
 747         .set_link_ksettings     = usbnet_set_link_ksettings,
 748 };
 749
 750 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 751 {
 752         struct usbnet *dev = netdev_priv(netdev);
 753
 754         if (!netif_running(netdev))
 755                 return -EINVAL;
 756
 757         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 758 }
 759
 760 static void smsc75xx_init_mac_address(struct usbnet *dev)
 761 {
 762         /* maybe the boot loader passed the MAC address in devicetree */
 763         if (!eth_platform_get_mac_address(&dev->udev->dev,
 764                         dev->net->dev_addr)) {
 765                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 766                         /* device tree values are valid so use them */
 767                         netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 768                         return;
 769                 }
 770         }
 771
 772         /* try reading mac address from EEPROM */
 773         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 774                         dev->net->dev_addr) == 0) {
 775                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 776                         /* eeprom values are valid so use them */
 777                         netif_dbg(dev, ifup, dev->net,
 778                                   "MAC address read from EEPROM\n");
 779                         return;
 780                 }
 781         }
 782
 783         /* no useful static MAC address found. generate a random one */
 784         eth_hw_addr_random(dev->net);
 785         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 786 }
 787
 788 static int smsc75xx_set_mac_address(struct usbnet *dev)
 789 {
 790         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 791                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 792         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 793
 794         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 795         if (ret < 0) {
 796                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 797                 return ret;
 798         }
 799
 800         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 801         if (ret < 0) {
 802                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 803                 return ret;
 804         }
 805
 806         addr_hi |= ADDR_FILTX_FB_VALID;
 807         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 808         if (ret < 0) {
 809                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 810                 return ret;
 811         }
 812
 813         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 814         if (ret < 0)
 815                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 816
 817         return ret;
 818 }
 819
 820 static int smsc75xx_phy_initialize(struct usbnet *dev)
 821 {
 822         int bmcr, ret, timeout = 0;
 823
 824         /* Initialize MII structure */
 825         dev->mii.dev = dev->net;
 826         dev->mii.mdio_read = smsc75xx_mdio_read;
 827         dev->mii.mdio_write = smsc75xx_mdio_write;
 828         dev->mii.phy_id_mask = 0x1f;
 829         dev->mii.reg_num_mask = 0x1f;
 830         dev->mii.supports_gmii = 1;
 831         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 832
 833         /* reset phy and wait for reset to complete */
 834         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 835
 836         do {
 837                 msleep(10);
 838                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 839                 if (bmcr < 0) {
 840                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 841                         return bmcr;
 842                 }
 843                 timeout++;
 844         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 845
 846         if (timeout >= 100) {
 847                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 848                 return -EIO;
 849         }
 850
 851         /* phy workaround for gig link */
 852         smsc75xx_phy_gig_workaround(dev);
 853
 854         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 855                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 856                 ADVERTISE_PAUSE_ASYM);
 857         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 858                 ADVERTISE_1000FULL);
 859
 860         /* read and write to clear phy interrupt status */
 861         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 862         if (ret < 0) {
 863                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 864                 return ret;
 865         }
 866
 867         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 868
 869         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 870                 PHY_INT_MASK_DEFAULT);
 871         mii_nway_restart(&dev->mii);
 872
 873         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 874         return 0;
 875 }
 876
 877 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 878 {
 879         int ret = 0;
 880         u32 buf;
 881         bool rxenabled;
 882
 883         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 884         if (ret < 0) {
 885                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 886                 return ret;
 887         }
 888
 889         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 890
 891         if (rxenabled) {
 892                 buf &= ~MAC_RX_RXEN;
 893                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 894                 if (ret < 0) {
 895                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 896                         return ret;
 897                 }
 898         }
 899
 900         /* add 4 to size for FCS */
 901         buf &= ~MAC_RX_MAX_SIZE;
 902         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 903
 904         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 905         if (ret < 0) {
 906                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 907                 return ret;
 908         }
 909
 910         if (rxenabled) {
 911                 buf |= MAC_RX_RXEN;
 912                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 913                 if (ret < 0) {
 914                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 915                         return ret;
 916                 }
 917         }
 918
 919         return 0;
 920 }
 921
 922 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 923 {
 924         struct usbnet *dev = netdev_priv(netdev);
 925         int ret;
 926
 927         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 928         if (ret < 0) {
 929                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 930                 return ret;
 931         }
 932
 933         return usbnet_change_mtu(netdev, new_mtu);
 934 }
 935
 936 /* Enable or disable Rx checksum offload engine */
 937 static int smsc75xx_set_features(struct net_device *netdev,
 938         netdev_features_t features)
 939 {
 940         struct usbnet *dev = netdev_priv(netdev);
 941         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 942         unsigned long flags;
 943         int ret;
 944
 945         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 946
 947         if (features & NETIF_F_RXCSUM)
 948                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 949         else
 950                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 951
 952         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 953         /* it's racing here! */
 954
 955         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 956         if (ret < 0) {
 957                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 958                 return ret;
 959         }
 960         return 0;
 961 }
 962
 963 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 964 {
 965         int timeout = 0;
 966
 967         do {
 968                 u32 buf;
 969                 int ret;
 970
 971                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 972
 973                 if (ret < 0) {
 974                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 975                         return ret;
 976                 }
 977
 978                 if (buf & PMT_CTL_DEV_RDY)
 979                         return 0;
 980
 981                 msleep(10);
 982                 timeout++;
 983         } while (timeout < 100);
 984
 985         netdev_warn(dev->net, "timeout waiting for device ready\n");
 986         return -EIO;
 987 }
 988
 989 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 990 {
 991         struct mii_if_info *mii = &dev->mii;
 992         int ret = 0, timeout = 0;
 993         u32 buf, link_up = 0;
 994
 995         /* Set the phy in Gig loopback */
 996         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 997
 998         /* Wait for the link up */
 999         do {
1000                 link_up = smsc75xx_link_ok_nopm(dev);
1001                 usleep_range(10000, 20000);
1002                 timeout++;
1003         } while ((!link_up) && (timeout < 1000));
1004
1005         if (timeout >= 1000) {
1006                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1007                 return -EIO;
1008         }
1009
1010         /* phy reset */
1011         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1012         if (ret < 0) {
1013                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1014                 return ret;
1015         }
1016
1017         buf |= PMT_CTL_PHY_RST;
1018
1019         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1020         if (ret < 0) {
1021                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1022                 return ret;
1023         }
1024
1025         timeout = 0;
1026         do {
1027                 usleep_range(10000, 20000);
1028                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1029                 if (ret < 0) {
1030                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1031                                     ret);
1032                         return ret;
1033                 }
1034                 timeout++;
1035         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1036
1037         if (timeout >= 100) {
1038                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1039                 return -EIO;
1040         }
1041
1042         return 0;
1043 }
1044
1045 static int smsc75xx_reset(struct usbnet *dev)
1046 {
1047         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1048         u32 buf;
1049         int ret = 0, timeout;
1050
1051         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1052
1053         ret = smsc75xx_wait_ready(dev, 0);
1054         if (ret < 0) {
1055                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1056                 return ret;
1057         }
1058
1059         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1060         if (ret < 0) {
1061                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1062                 return ret;
1063         }
1064
1065         buf |= HW_CFG_LRST;
1066
1067         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1068         if (ret < 0) {
1069                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1070                 return ret;
1071         }
1072
1073         timeout = 0;
1074         do {
1075                 msleep(10);
1076                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1077                 if (ret < 0) {
1078                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1079                         return ret;
1080                 }
1081                 timeout++;
1082         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1083
1084         if (timeout >= 100) {
1085                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1086                 return -EIO;
1087         }
1088
1089         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1090
1091         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1092         if (ret < 0) {
1093                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1094                 return ret;
1095         }
1096
1097         buf |= PMT_CTL_PHY_RST;
1098
1099         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1100         if (ret < 0) {
1101                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1102                 return ret;
1103         }
1104
1105         timeout = 0;
1106         do {
1107                 msleep(10);
1108                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1109                 if (ret < 0) {
1110                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1111                         return ret;
1112                 }
1113                 timeout++;
1114         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1115
1116         if (timeout >= 100) {
1117                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1118                 return -EIO;
1119         }
1120
1121         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1122
1123         ret = smsc75xx_set_mac_address(dev);
1124         if (ret < 0) {
1125                 netdev_warn(dev->net, "Failed to set mac address\n");
1126                 return ret;
1127         }
1128
1129         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1130                   dev->net->dev_addr);
1131
1132         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1133         if (ret < 0) {
1134                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1135                 return ret;
1136         }
1137
1138         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1139                   buf);
1140
1141         buf |= HW_CFG_BIR;
1142
1143         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1144         if (ret < 0) {
1145                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1146                 return ret;
1147         }
1148
1149         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1150         if (ret < 0) {
1151                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1152                 return ret;
1153         }
1154
1155         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1156                   buf);
1157
1158         if (!turbo_mode) {
1159                 buf = 0;
1160                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1161         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1162                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1163                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1164         } else {
1165                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1166                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1167         }
1168
1169         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1170                   (ulong)dev->rx_urb_size);
1171
1172         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1173         if (ret < 0) {
1174                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1175                 return ret;
1176         }
1177
1178         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1179         if (ret < 0) {
1180                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1181                 return ret;
1182         }
1183
1184         netif_dbg(dev, ifup, dev->net,
1185                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1186
1187         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1188         if (ret < 0) {
1189                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1190                 return ret;
1191         }
1192
1193         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1194         if (ret < 0) {
1195                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1196                 return ret;
1197         }
1198
1199         netif_dbg(dev, ifup, dev->net,
1200                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1201
1202         if (turbo_mode) {
1203                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1204                 if (ret < 0) {
1205                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1206                         return ret;
1207                 }
1208
1209                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1210
1211                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1212
1213                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1214                 if (ret < 0) {
1215                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1216                         return ret;
1217                 }
1218
1219                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1220                 if (ret < 0) {
1221                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1222                         return ret;
1223                 }
1224
1225                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1226         }
1227
1228         /* set FIFO sizes */
1229         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1230         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1231         if (ret < 0) {
1232                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1233                 return ret;
1234         }
1235
1236         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1237
1238         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1239         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1240         if (ret < 0) {
1241                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1242                 return ret;
1243         }
1244
1245         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1246
1247         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1248         if (ret < 0) {
1249                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1250                 return ret;
1251         }
1252
1253         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1254         if (ret < 0) {
1255                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1256                 return ret;
1257         }
1258
1259         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1260
1261         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1262         if (ret < 0) {
1263                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1264                 return ret;
1265         }
1266
1267         /* only set default GPIO/LED settings if no EEPROM is detected */
1268         if (!(buf & E2P_CMD_LOADED)) {
1269                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1270                 if (ret < 0) {
1271                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1272                         return ret;
1273                 }
1274
1275                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1276                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1277
1278                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1279                 if (ret < 0) {
1280                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1281                         return ret;
1282                 }
1283         }
1284
1285         ret = smsc75xx_write_reg(dev, FLOW, 0);
1286         if (ret < 0) {
1287                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1288                 return ret;
1289         }
1290
1291         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1292         if (ret < 0) {
1293                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1294                 return ret;
1295         }
1296
1297         /* Don't need rfe_ctl_lock during initialisation */
1298         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1299         if (ret < 0) {
1300                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1301                 return ret;
1302         }
1303
1304         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1305
1306         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1307         if (ret < 0) {
1308                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1309                 return ret;
1310         }
1311
1312         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1313         if (ret < 0) {
1314                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1315                 return ret;
1316         }
1317
1318         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1319                   pdata->rfe_ctl);
1320
1321         /* Enable or disable checksum offload engines */
1322         smsc75xx_set_features(dev->net, dev->net->features);
1323
1324         smsc75xx_set_multicast(dev->net);
1325
1326         ret = smsc75xx_phy_initialize(dev);
1327         if (ret < 0) {
1328                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1329                 return ret;
1330         }
1331
1332         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1333         if (ret < 0) {
1334                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1335                 return ret;
1336         }
1337
1338         /* enable PHY interrupts */
1339         buf |= INT_ENP_PHY_INT;
1340
1341         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1342         if (ret < 0) {
1343                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1344                 return ret;
1345         }
1346
1347         /* allow mac to detect speed and duplex from phy */
1348         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1349         if (ret < 0) {
1350                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1351                 return ret;
1352         }
1353
1354         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1355         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1356         if (ret < 0) {
1357                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1358                 return ret;
1359         }
1360
1361         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1362         if (ret < 0) {
1363                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1364                 return ret;
1365         }
1366
1367         buf |= MAC_TX_TXEN;
1368
1369         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1370         if (ret < 0) {
1371                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1372                 return ret;
1373         }
1374
1375         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1376
1377         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1378         if (ret < 0) {
1379                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1380                 return ret;
1381         }
1382
1383         buf |= FCT_TX_CTL_EN;
1384
1385         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1386         if (ret < 0) {
1387                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1388                 return ret;
1389         }
1390
1391         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1392
1393         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1394         if (ret < 0) {
1395                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1396                 return ret;
1397         }
1398
1399         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1400         if (ret < 0) {
1401                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1402                 return ret;
1403         }
1404
1405         buf |= MAC_RX_RXEN;
1406
1407         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1408         if (ret < 0) {
1409                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1410                 return ret;
1411         }
1412
1413         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1414
1415         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1416         if (ret < 0) {
1417                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1418                 return ret;
1419         }
1420
1421         buf |= FCT_RX_CTL_EN;
1422
1423         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1424         if (ret < 0) {
1425                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1426                 return ret;
1427         }
1428
1429         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1430
1431         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1432         return 0;
1433 }
1434
1435 static const struct net_device_ops smsc75xx_netdev_ops = {
1436         .ndo_open               = usbnet_open,
1437         .ndo_stop               = usbnet_stop,
1438         .ndo_start_xmit         = usbnet_start_xmit,
1439         .ndo_tx_timeout         = usbnet_tx_timeout,
1440         .ndo_get_stats64        = usbnet_get_stats64,
1441         .ndo_change_mtu         = smsc75xx_change_mtu,
1442         .ndo_set_mac_address    = eth_mac_addr,
1443         .ndo_validate_addr      = eth_validate_addr,
1444         .ndo_do_ioctl           = smsc75xx_ioctl,
1445         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1446         .ndo_set_features       = smsc75xx_set_features,
1447 };
1448
1449 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1450 {
1451         struct smsc75xx_priv *pdata = NULL;
1452         int ret;
1453
1454         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1455
1456         ret = usbnet_get_endpoints(dev, intf);
1457         if (ret < 0) {
1458                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1459                 return ret;
1460         }
1461
1462         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1463                                               GFP_KERNEL);
1464
1465         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1466         if (!pdata)
1467                 return -ENOMEM;
1468
1469         pdata->dev = dev;
1470
1471         spin_lock_init(&pdata->rfe_ctl_lock);
1472         mutex_init(&pdata->dataport_mutex);
1473
1474         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1475
1476         if (DEFAULT_TX_CSUM_ENABLE)
1477                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1478
1479         if (DEFAULT_RX_CSUM_ENABLE)
1480                 dev->net->features |= NETIF_F_RXCSUM;
1481
1482         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1483                                 NETIF_F_RXCSUM;
1484
1485         ret = smsc75xx_wait_ready(dev, 0);
1486         if (ret < 0) {
1487                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1488                 goto free_pdata;
1489         }
1490
1491         smsc75xx_init_mac_address(dev);
1492
1493         /* Init all registers */
1494         ret = smsc75xx_reset(dev);
1495         if (ret < 0) {
1496                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1497                 goto cancel_work;
1498         }
1499
1500         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1501         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1502         dev->net->flags |= IFF_MULTICAST;
1503         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1504         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1505         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1506         return 0;
1507
1508 cancel_work:
1509         cancel_work_sync(&pdata->set_multicast);
1510 free_pdata:
1511         kfree(pdata);
1512         dev->data[0] = 0;
1513         return ret;
1514 }
1515
1516 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1517 {
1518         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1519         if (pdata) {
1520                 cancel_work_sync(&pdata->set_multicast);
1521                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1522                 kfree(pdata);
1523                 dev->data[0] = 0;
1524         }
1525 }
1526
1527 static u16 smsc_crc(const u8 *buffer, size_t len)
1528 {
1529         return bitrev16(crc16(0xFFFF, buffer, len));
1530 }
1531
1532 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1533                                u32 wuf_mask1)
1534 {
1535         int cfg_base = WUF_CFGX + filter * 4;
1536         int mask_base = WUF_MASKX + filter * 16;
1537         int ret;
1538
1539         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1540         if (ret < 0) {
1541                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1542                 return ret;
1543         }
1544
1545         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1546         if (ret < 0) {
1547                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1548                 return ret;
1549         }
1550
1551         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1552         if (ret < 0) {
1553                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1554                 return ret;
1555         }
1556
1557         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1558         if (ret < 0) {
1559                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1560                 return ret;
1561         }
1562
1563         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1564         if (ret < 0) {
1565                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1566                 return ret;
1567         }
1568
1569         return 0;
1570 }
1571
1572 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1573 {
1574         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575         u32 val;
1576         int ret;
1577
1578         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581                 return ret;
1582         }
1583
1584         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1585         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1586
1587         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588         if (ret < 0) {
1589                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590                 return ret;
1591         }
1592
1593         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1594
1595         return 0;
1596 }
1597
1598 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1599 {
1600         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601         u32 val;
1602         int ret;
1603
1604         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1605         if (ret < 0) {
1606                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1607                 return ret;
1608         }
1609
1610         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1611         val |= PMT_CTL_SUS_MODE_1;
1612
1613         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1614         if (ret < 0) {
1615                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1616                 return ret;
1617         }
1618
1619         /* clear wol status, enable energy detection */
1620         val &= ~PMT_CTL_WUPS;
1621         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1622
1623         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1624         if (ret < 0) {
1625                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1626                 return ret;
1627         }
1628
1629         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1630
1631         return 0;
1632 }
1633
1634 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1635 {
1636         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1637         u32 val;
1638         int ret;
1639
1640         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1641         if (ret < 0) {
1642                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1643                 return ret;
1644         }
1645
1646         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1647         val |= PMT_CTL_SUS_MODE_2;
1648
1649         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1650         if (ret < 0) {
1651                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1652                 return ret;
1653         }
1654
1655         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1656
1657         return 0;
1658 }
1659
1660 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1661 {
1662         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1663         u32 val;
1664         int ret;
1665
1666         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1667         if (ret < 0) {
1668                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1669                 return ret;
1670         }
1671
1672         if (val & FCT_RX_CTL_RXUSED) {
1673                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1674                 return -EBUSY;
1675         }
1676
1677         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1678         if (ret < 0) {
1679                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1680                 return ret;
1681         }
1682
1683         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1684         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1685
1686         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1687         if (ret < 0) {
1688                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1689                 return ret;
1690         }
1691
1692         /* clear wol status */
1693         val &= ~PMT_CTL_WUPS;
1694         val |= PMT_CTL_WUPS_WOL;
1695
1696         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1697         if (ret < 0) {
1698                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1699                 return ret;
1700         }
1701
1702         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1703
1704         return 0;
1705 }
1706
1707 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1708 {
1709         struct mii_if_info *mii = &dev->mii;
1710         int ret;
1711
1712         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1713
1714         /* read to clear */
1715         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1716         if (ret < 0) {
1717                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1718                 return ret;
1719         }
1720
1721         /* enable interrupt source */
1722         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1723         if (ret < 0) {
1724                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1725                 return ret;
1726         }
1727
1728         ret |= mask;
1729
1730         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1731
1732         return 0;
1733 }
1734
1735 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1736 {
1737         struct mii_if_info *mii = &dev->mii;
1738         int ret;
1739
1740         /* first, a dummy read, needed to latch some MII phys */
1741         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1742         if (ret < 0) {
1743                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1744                 return ret;
1745         }
1746
1747         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1748         if (ret < 0) {
1749                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1750                 return ret;
1751         }
1752
1753         return !!(ret & BMSR_LSTATUS);
1754 }
1755
1756 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1757 {
1758         int ret;
1759
1760         if (!netif_running(dev->net)) {
1761                 /* interface is ifconfig down so fully power down hw */
1762                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1763                 return smsc75xx_enter_suspend2(dev);
1764         }
1765
1766         if (!link_up) {
1767                 /* link is down so enter EDPD mode */
1768                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1769
1770                 /* enable PHY wakeup events for if cable is attached */
1771                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1772                         PHY_INT_MASK_ANEG_COMP);
1773                 if (ret < 0) {
1774                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1775                         return ret;
1776                 }
1777
1778                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1779                 return smsc75xx_enter_suspend1(dev);
1780         }
1781
1782         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1783         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1784                 PHY_INT_MASK_LINK_DOWN);
1785         if (ret < 0) {
1786                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1787                 return ret;
1788         }
1789
1790         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1791         return smsc75xx_enter_suspend3(dev);
1792 }
1793
1794 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1795 {
1796         struct usbnet *dev = usb_get_intfdata(intf);
1797         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1798         u32 val, link_up;
1799         int ret;
1800
1801         ret = usbnet_suspend(intf, message);
1802         if (ret < 0) {
1803                 netdev_warn(dev->net, "usbnet_suspend error\n");
1804                 return ret;
1805         }
1806
1807         if (pdata->suspend_flags) {
1808                 netdev_warn(dev->net, "error during last resume\n");
1809                 pdata->suspend_flags = 0;
1810         }
1811
1812         /* determine if link is up using only _nopm functions */
1813         link_up = smsc75xx_link_ok_nopm(dev);
1814
1815         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1816                 ret = smsc75xx_autosuspend(dev, link_up);
1817                 goto done;
1818         }
1819
1820         /* if we get this far we're not autosuspending */
1821         /* if no wol options set, or if link is down and we're not waking on
1822          * PHY activity, enter lowest power SUSPEND2 mode
1823          */
1824         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1825                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1826                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1827
1828                 /* disable energy detect (link up) & wake up events */
1829                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1830                 if (ret < 0) {
1831                         netdev_warn(dev->net, "Error reading WUCSR\n");
1832                         goto done;
1833                 }
1834
1835                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1836
1837                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1838                 if (ret < 0) {
1839                         netdev_warn(dev->net, "Error writing WUCSR\n");
1840                         goto done;
1841                 }
1842
1843                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1844                 if (ret < 0) {
1845                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1846                         goto done;
1847                 }
1848
1849                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1850
1851                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1852                 if (ret < 0) {
1853                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1854                         goto done;
1855                 }
1856
1857                 ret = smsc75xx_enter_suspend2(dev);
1858                 goto done;
1859         }
1860
1861         if (pdata->wolopts & WAKE_PHY) {
1862                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1863                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1864                 if (ret < 0) {
1865                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1866                         goto done;
1867                 }
1868
1869                 /* if link is down then configure EDPD and enter SUSPEND1,
1870                  * otherwise enter SUSPEND0 below
1871                  */
1872                 if (!link_up) {
1873                         struct mii_if_info *mii = &dev->mii;
1874                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1875
1876                         /* enable energy detect power-down mode */
1877                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1878                                 PHY_MODE_CTRL_STS);
1879                         if (ret < 0) {
1880                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1881                                 goto done;
1882                         }
1883
1884                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1885
1886                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1887                                 PHY_MODE_CTRL_STS, ret);
1888
1889                         /* enter SUSPEND1 mode */
1890                         ret = smsc75xx_enter_suspend1(dev);
1891                         goto done;
1892                 }
1893         }
1894
1895         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1896                 int i, filter = 0;
1897
1898                 /* disable all filters */
1899                 for (i = 0; i < WUF_NUM; i++) {
1900                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1901                         if (ret < 0) {
1902                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1903                                 goto done;
1904                         }
1905                 }
1906
1907                 if (pdata->wolopts & WAKE_MCAST) {
1908                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1909                         netdev_info(dev->net, "enabling multicast detection\n");
1910
1911                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1912                                 | smsc_crc(mcast, 3);
1913                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1914                         if (ret < 0) {
1915                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1916                                 goto done;
1917                         }
1918                 }
1919
1920                 if (pdata->wolopts & WAKE_ARP) {
1921                         const u8 arp[] = {0x08, 0x06};
1922                         netdev_info(dev->net, "enabling ARP detection\n");
1923
1924                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1925                                 | smsc_crc(arp, 2);
1926                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1927                         if (ret < 0) {
1928                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1929                                 goto done;
1930                         }
1931                 }
1932
1933                 /* clear any pending pattern match packet status */
1934                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1935                 if (ret < 0) {
1936                         netdev_warn(dev->net, "Error reading WUCSR\n");
1937                         goto done;
1938                 }
1939
1940                 val |= WUCSR_WUFR;
1941
1942                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1943                 if (ret < 0) {
1944                         netdev_warn(dev->net, "Error writing WUCSR\n");
1945                         goto done;
1946                 }
1947
1948                 netdev_info(dev->net, "enabling packet match detection\n");
1949                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1950                 if (ret < 0) {
1951                         netdev_warn(dev->net, "Error reading WUCSR\n");
1952                         goto done;
1953                 }
1954
1955                 val |= WUCSR_WUEN;
1956
1957                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1958                 if (ret < 0) {
1959                         netdev_warn(dev->net, "Error writing WUCSR\n");
1960                         goto done;
1961                 }
1962         } else {
1963                 netdev_info(dev->net, "disabling packet match detection\n");
1964                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1965                 if (ret < 0) {
1966                         netdev_warn(dev->net, "Error reading WUCSR\n");
1967                         goto done;
1968                 }
1969
1970                 val &= ~WUCSR_WUEN;
1971
1972                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1973                 if (ret < 0) {
1974                         netdev_warn(dev->net, "Error writing WUCSR\n");
1975                         goto done;
1976                 }
1977         }
1978
1979         /* disable magic, bcast & unicast wakeup sources */
1980         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1981         if (ret < 0) {
1982                 netdev_warn(dev->net, "Error reading WUCSR\n");
1983                 goto done;
1984         }
1985
1986         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1987
1988         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1989         if (ret < 0) {
1990                 netdev_warn(dev->net, "Error writing WUCSR\n");
1991                 goto done;
1992         }
1993
1994         if (pdata->wolopts & WAKE_PHY) {
1995                 netdev_info(dev->net, "enabling PHY wakeup\n");
1996
1997                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1998                 if (ret < 0) {
1999                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2000                         goto done;
2001                 }
2002
2003                 /* clear wol status, enable energy detection */
2004                 val &= ~PMT_CTL_WUPS;
2005                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2006
2007                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2008                 if (ret < 0) {
2009                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2010                         goto done;
2011                 }
2012         }
2013
2014         if (pdata->wolopts & WAKE_MAGIC) {
2015                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2016                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2017                 if (ret < 0) {
2018                         netdev_warn(dev->net, "Error reading WUCSR\n");
2019                         goto done;
2020                 }
2021
2022                 /* clear any pending magic packet status */
2023                 val |= WUCSR_MPR | WUCSR_MPEN;
2024
2025                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2026                 if (ret < 0) {
2027                         netdev_warn(dev->net, "Error writing WUCSR\n");
2028                         goto done;
2029                 }
2030         }
2031
2032         if (pdata->wolopts & WAKE_BCAST) {
2033                 netdev_info(dev->net, "enabling broadcast detection\n");
2034                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2035                 if (ret < 0) {
2036                         netdev_warn(dev->net, "Error reading WUCSR\n");
2037                         goto done;
2038                 }
2039
2040                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2041
2042                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2043                 if (ret < 0) {
2044                         netdev_warn(dev->net, "Error writing WUCSR\n");
2045                         goto done;
2046                 }
2047         }
2048
2049         if (pdata->wolopts & WAKE_UCAST) {
2050                 netdev_info(dev->net, "enabling unicast detection\n");
2051                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2052                 if (ret < 0) {
2053                         netdev_warn(dev->net, "Error reading WUCSR\n");
2054                         goto done;
2055                 }
2056
2057                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2058
2059                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2060                 if (ret < 0) {
2061                         netdev_warn(dev->net, "Error writing WUCSR\n");
2062                         goto done;
2063                 }
2064         }
2065
2066         /* enable receiver to enable frame reception */
2067         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2068         if (ret < 0) {
2069                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2070                 goto done;
2071         }
2072
2073         val |= MAC_RX_RXEN;
2074
2075         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2076         if (ret < 0) {
2077                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2078                 goto done;
2079         }
2080
2081         /* some wol options are enabled, so enter SUSPEND0 */
2082         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2083         ret = smsc75xx_enter_suspend0(dev);
2084
2085 done:
2086         /*
2087          * TODO: resume() might need to handle the suspend failure
2088          * in system sleep
2089          */
2090         if (ret && PMSG_IS_AUTO(message))
2091                 usbnet_resume(intf);
2092         return ret;
2093 }
2094
2095 static int smsc75xx_resume(struct usb_interface *intf)
2096 {
2097         struct usbnet *dev = usb_get_intfdata(intf);
2098         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2099         u8 suspend_flags = pdata->suspend_flags;
2100         int ret;
2101         u32 val;
2102
2103         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2104
2105         /* do this first to ensure it's cleared even in error case */
2106         pdata->suspend_flags = 0;
2107
2108         if (suspend_flags & SUSPEND_ALLMODES) {
2109                 /* Disable wakeup sources */
2110                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2111                 if (ret < 0) {
2112                         netdev_warn(dev->net, "Error reading WUCSR\n");
2113                         return ret;
2114                 }
2115
2116                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2117                         | WUCSR_BCST_EN);
2118
2119                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2120                 if (ret < 0) {
2121                         netdev_warn(dev->net, "Error writing WUCSR\n");
2122                         return ret;
2123                 }
2124
2125                 /* clear wake-up status */
2126                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2127                 if (ret < 0) {
2128                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2129                         return ret;
2130                 }
2131
2132                 val &= ~PMT_CTL_WOL_EN;
2133                 val |= PMT_CTL_WUPS;
2134
2135                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2136                 if (ret < 0) {
2137                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2138                         return ret;
2139                 }
2140         }
2141
2142         if (suspend_flags & SUSPEND_SUSPEND2) {
2143                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2144
2145                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2146                 if (ret < 0) {
2147                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2148                         return ret;
2149                 }
2150
2151                 val |= PMT_CTL_PHY_PWRUP;
2152
2153                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2154                 if (ret < 0) {
2155                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2156                         return ret;
2157                 }
2158         }
2159
2160         ret = smsc75xx_wait_ready(dev, 1);
2161         if (ret < 0) {
2162                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2163                 return ret;
2164         }
2165
2166         return usbnet_resume(intf);
2167 }
2168
2169 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2170                                      u32 rx_cmd_a, u32 rx_cmd_b)
2171 {
2172         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2173             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2174                 skb->ip_summed = CHECKSUM_NONE;
2175         } else {
2176                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2177                 skb->ip_summed = CHECKSUM_COMPLETE;
2178         }
2179 }
2180
2181 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2182 {
2183         /* This check is no longer done by usbnet */
2184         if (skb->len < dev->net->hard_header_len)
2185                 return 0;
2186
2187         while (skb->len > 0) {
2188                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2189                 struct sk_buff *ax_skb;
2190                 unsigned char *packet;
2191
2192                 rx_cmd_a = get_unaligned_le32(skb->data);
2193                 skb_pull(skb, 4);
2194
2195                 rx_cmd_b = get_unaligned_le32(skb->data);
2196                 skb_pull(skb, 4 + RXW_PADDING);
2197
2198                 packet = skb->data;
2199
2200                 /* get the packet length */
2201                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2202                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2203
2204                 if (unlikely(size > skb->len)) {
2205                         netif_dbg(dev, rx_err, dev->net,
2206                                   "size err rx_cmd_a=0x%08x\n",
2207                                   rx_cmd_a);
2208                         return 0;
2209                 }
2210
2211                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2212                         netif_dbg(dev, rx_err, dev->net,
2213                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2214                         dev->net->stats.rx_errors++;
2215                         dev->net->stats.rx_dropped++;
2216
2217                         if (rx_cmd_a & RX_CMD_A_FCS)
2218                                 dev->net->stats.rx_crc_errors++;
2219                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2220                                 dev->net->stats.rx_frame_errors++;
2221                 } else {
2222                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2223                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2224                                 netif_dbg(dev, rx_err, dev->net,
2225                                           "size err rx_cmd_a=0x%08x\n",
2226                                           rx_cmd_a);
2227                                 return 0;
2228                         }
2229
2230                         /* last frame in this batch */
2231                         if (skb->len == size) {
2232                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2233                                         rx_cmd_b);
2234
2235                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2236                                 skb->truesize = size + sizeof(struct sk_buff);
2237
2238                                 return 1;
2239                         }
2240
2241                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2242                         if (unlikely(!ax_skb)) {
2243                                 netdev_warn(dev->net, "Error allocating skb\n");
2244                                 return 0;
2245                         }
2246
2247                         ax_skb->len = size;
2248                         ax_skb->data = packet;
2249                         skb_set_tail_pointer(ax_skb, size);
2250
2251                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2252                                 rx_cmd_b);
2253
2254                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2255                         ax_skb->truesize = size + sizeof(struct sk_buff);
2256
2257                         usbnet_skb_return(dev, ax_skb);
2258                 }
2259
2260                 skb_pull(skb, size);
2261
2262                 /* padding bytes before the next frame starts */
2263                 if (skb->len)
2264                         skb_pull(skb, align_count);
2265         }
2266
2267         return 1;
2268 }
2269
2270 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2271                                          struct sk_buff *skb, gfp_t flags)
2272 {
2273         u32 tx_cmd_a, tx_cmd_b;
2274         void *ptr;
2275
2276         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2277                 dev_kfree_skb_any(skb);
2278                 return NULL;
2279         }
2280
2281         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2282
2283         if (skb->ip_summed == CHECKSUM_PARTIAL)
2284                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2285
2286         if (skb_is_gso(skb)) {
2287                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2288                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2289
2290                 tx_cmd_a |= TX_CMD_A_LSO;
2291         } else {
2292                 tx_cmd_b = 0;
2293         }
2294
2295         ptr = skb_push(skb, 8);
2296         put_unaligned_le32(tx_cmd_a, ptr);
2297         put_unaligned_le32(tx_cmd_b, ptr + 4);
2298
2299         return skb;
2300 }
2301
2302 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2303 {
2304         dev->intf->needs_remote_wakeup = on;
2305         return 0;
2306 }
2307
2308 static const struct driver_info smsc75xx_info = {
2309         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2310         .bind           = smsc75xx_bind,
2311         .unbind         = smsc75xx_unbind,
2312         .link_reset     = smsc75xx_link_reset,
2313         .reset          = smsc75xx_reset,
2314         .rx_fixup       = smsc75xx_rx_fixup,
2315         .tx_fixup       = smsc75xx_tx_fixup,
2316         .status         = smsc75xx_status,
2317         .manage_power   = smsc75xx_manage_power,
2318         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2319 };
2320
2321 static const struct usb_device_id products[] = {
2322         {
2323                 /* SMSC7500 USB Gigabit Ethernet Device */
2324                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2325                 .driver_info = (unsigned long) &smsc75xx_info,
2326         },
2327         {
2328                 /* SMSC7500 USB Gigabit Ethernet Device */
2329                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2330                 .driver_info = (unsigned long) &smsc75xx_info,
2331         },
2332         { },            /* END */
2333 };
2334 MODULE_DEVICE_TABLE(usb, products);
2335
2336 static struct usb_driver smsc75xx_driver = {
2337         .name           = SMSC_CHIPNAME,
2338         .id_table       = products,
2339         .probe          = usbnet_probe,
2340         .suspend        = smsc75xx_suspend,
2341         .resume         = smsc75xx_resume,
2342         .reset_resume   = smsc75xx_resume,
2343         .disconnect     = usbnet_disconnect,
2344         .disable_hub_initiated_lpm = 1,
2345         .supports_autosuspend = 1,
2346 };
2347
2348 module_usb_driver(smsc75xx_driver);
2349
2350 MODULE_AUTHOR("Nancy Lin");
2351 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2352 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2353 MODULE_LICENSE("GPL");