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_mii,
 747         .set_link_ksettings     = usbnet_set_link_ksettings_mii,
 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         u8 addr[ETH_ALEN];
 763
 764         /* maybe the boot loader passed the MAC address in devicetree */
 765         if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
 766                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 767                         /* device tree values are valid so use them */
 768                         netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 769                         return;
 770                 }
 771         }
 772
 773         /* try reading mac address from EEPROM */
 774         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
 775                 eth_hw_addr_set(dev->net, addr);
 776                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 777                         /* eeprom values are valid so use them */
 778                         netif_dbg(dev, ifup, dev->net,
 779                                   "MAC address read from EEPROM\n");
 780                         return;
 781                 }
 782         }
 783
 784         /* no useful static MAC address found. generate a random one */
 785         eth_hw_addr_random(dev->net);
 786         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 787 }
 788
 789 static int smsc75xx_set_mac_address(struct usbnet *dev)
 790 {
 791         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 792                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 793         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 794
 795         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 796         if (ret < 0) {
 797                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 798                 return ret;
 799         }
 800
 801         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 802         if (ret < 0) {
 803                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 804                 return ret;
 805         }
 806
 807         addr_hi |= ADDR_FILTX_FB_VALID;
 808         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 809         if (ret < 0) {
 810                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 811                 return ret;
 812         }
 813
 814         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 815         if (ret < 0)
 816                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 817
 818         return ret;
 819 }
 820
 821 static int smsc75xx_phy_initialize(struct usbnet *dev)
 822 {
 823         int bmcr, ret, timeout = 0;
 824
 825         /* Initialize MII structure */
 826         dev->mii.dev = dev->net;
 827         dev->mii.mdio_read = smsc75xx_mdio_read;
 828         dev->mii.mdio_write = smsc75xx_mdio_write;
 829         dev->mii.phy_id_mask = 0x1f;
 830         dev->mii.reg_num_mask = 0x1f;
 831         dev->mii.supports_gmii = 1;
 832         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 833
 834         /* reset phy and wait for reset to complete */
 835         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 836
 837         do {
 838                 msleep(10);
 839                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 840                 if (bmcr < 0) {
 841                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 842                         return bmcr;
 843                 }
 844                 timeout++;
 845         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 846
 847         if (timeout >= 100) {
 848                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 849                 return -EIO;
 850         }
 851
 852         /* phy workaround for gig link */
 853         smsc75xx_phy_gig_workaround(dev);
 854
 855         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 856                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 857                 ADVERTISE_PAUSE_ASYM);
 858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 859                 ADVERTISE_1000FULL);
 860
 861         /* read and write to clear phy interrupt status */
 862         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 863         if (ret < 0) {
 864                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 865                 return ret;
 866         }
 867
 868         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 869
 870         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 871                 PHY_INT_MASK_DEFAULT);
 872         mii_nway_restart(&dev->mii);
 873
 874         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 875         return 0;
 876 }
 877
 878 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 879 {
 880         int ret = 0;
 881         u32 buf;
 882         bool rxenabled;
 883
 884         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 885         if (ret < 0) {
 886                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 887                 return ret;
 888         }
 889
 890         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 891
 892         if (rxenabled) {
 893                 buf &= ~MAC_RX_RXEN;
 894                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 895                 if (ret < 0) {
 896                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 897                         return ret;
 898                 }
 899         }
 900
 901         /* add 4 to size for FCS */
 902         buf &= ~MAC_RX_MAX_SIZE;
 903         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 904
 905         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 906         if (ret < 0) {
 907                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 908                 return ret;
 909         }
 910
 911         if (rxenabled) {
 912                 buf |= MAC_RX_RXEN;
 913                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 914                 if (ret < 0) {
 915                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 916                         return ret;
 917                 }
 918         }
 919
 920         return 0;
 921 }
 922
 923 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 924 {
 925         struct usbnet *dev = netdev_priv(netdev);
 926         int ret;
 927
 928         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 929         if (ret < 0) {
 930                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 931                 return ret;
 932         }
 933
 934         return usbnet_change_mtu(netdev, new_mtu);
 935 }
 936
 937 /* Enable or disable Rx checksum offload engine */
 938 static int smsc75xx_set_features(struct net_device *netdev,
 939         netdev_features_t features)
 940 {
 941         struct usbnet *dev = netdev_priv(netdev);
 942         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 943         unsigned long flags;
 944         int ret;
 945
 946         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 947
 948         if (features & NETIF_F_RXCSUM)
 949                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 950         else
 951                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 952
 953         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 954         /* it's racing here! */
 955
 956         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 957         if (ret < 0) {
 958                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 959                 return ret;
 960         }
 961         return 0;
 962 }
 963
 964 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 965 {
 966         int timeout = 0;
 967
 968         do {
 969                 u32 buf;
 970                 int ret;
 971
 972                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 973
 974                 if (ret < 0) {
 975                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 976                         return ret;
 977                 }
 978
 979                 if (buf & PMT_CTL_DEV_RDY)
 980                         return 0;
 981
 982                 msleep(10);
 983                 timeout++;
 984         } while (timeout < 100);
 985
 986         netdev_warn(dev->net, "timeout waiting for device ready\n");
 987         return -EIO;
 988 }
 989
 990 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 991 {
 992         struct mii_if_info *mii = &dev->mii;
 993         int ret = 0, timeout = 0;
 994         u32 buf, link_up = 0;
 995
 996         /* Set the phy in Gig loopback */
 997         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 998
 999         /* Wait for the link up */
1000         do {
1001                 link_up = smsc75xx_link_ok_nopm(dev);
1002                 usleep_range(10000, 20000);
1003                 timeout++;
1004         } while ((!link_up) && (timeout < 1000));
1005
1006         if (timeout >= 1000) {
1007                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1008                 return -EIO;
1009         }
1010
1011         /* phy reset */
1012         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1013         if (ret < 0) {
1014                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1015                 return ret;
1016         }
1017
1018         buf |= PMT_CTL_PHY_RST;
1019
1020         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1021         if (ret < 0) {
1022                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1023                 return ret;
1024         }
1025
1026         timeout = 0;
1027         do {
1028                 usleep_range(10000, 20000);
1029                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1030                 if (ret < 0) {
1031                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1032                                     ret);
1033                         return ret;
1034                 }
1035                 timeout++;
1036         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1037
1038         if (timeout >= 100) {
1039                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1040                 return -EIO;
1041         }
1042
1043         return 0;
1044 }
1045
1046 static int smsc75xx_reset(struct usbnet *dev)
1047 {
1048         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1049         u32 buf;
1050         int ret = 0, timeout;
1051
1052         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1053
1054         ret = smsc75xx_wait_ready(dev, 0);
1055         if (ret < 0) {
1056                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1057                 return ret;
1058         }
1059
1060         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1061         if (ret < 0) {
1062                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1063                 return ret;
1064         }
1065
1066         buf |= HW_CFG_LRST;
1067
1068         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1069         if (ret < 0) {
1070                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1071                 return ret;
1072         }
1073
1074         timeout = 0;
1075         do {
1076                 msleep(10);
1077                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1078                 if (ret < 0) {
1079                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1080                         return ret;
1081                 }
1082                 timeout++;
1083         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1084
1085         if (timeout >= 100) {
1086                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1087                 return -EIO;
1088         }
1089
1090         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1091
1092         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1093         if (ret < 0) {
1094                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1095                 return ret;
1096         }
1097
1098         buf |= PMT_CTL_PHY_RST;
1099
1100         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1101         if (ret < 0) {
1102                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1103                 return ret;
1104         }
1105
1106         timeout = 0;
1107         do {
1108                 msleep(10);
1109                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1110                 if (ret < 0) {
1111                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1112                         return ret;
1113                 }
1114                 timeout++;
1115         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1116
1117         if (timeout >= 100) {
1118                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1119                 return -EIO;
1120         }
1121
1122         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1123
1124         ret = smsc75xx_set_mac_address(dev);
1125         if (ret < 0) {
1126                 netdev_warn(dev->net, "Failed to set mac address\n");
1127                 return ret;
1128         }
1129
1130         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1131                   dev->net->dev_addr);
1132
1133         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1134         if (ret < 0) {
1135                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1136                 return ret;
1137         }
1138
1139         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1140                   buf);
1141
1142         buf |= HW_CFG_BIR;
1143
1144         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1145         if (ret < 0) {
1146                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1147                 return ret;
1148         }
1149
1150         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151         if (ret < 0) {
1152                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153                 return ret;
1154         }
1155
1156         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1157                   buf);
1158
1159         if (!turbo_mode) {
1160                 buf = 0;
1161                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1162         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1163                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1164                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1165         } else {
1166                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1167                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1168         }
1169
1170         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1171                   (ulong)dev->rx_urb_size);
1172
1173         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1174         if (ret < 0) {
1175                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1176                 return ret;
1177         }
1178
1179         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1180         if (ret < 0) {
1181                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1182                 return ret;
1183         }
1184
1185         netif_dbg(dev, ifup, dev->net,
1186                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1187
1188         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1189         if (ret < 0) {
1190                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1191                 return ret;
1192         }
1193
1194         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1195         if (ret < 0) {
1196                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1197                 return ret;
1198         }
1199
1200         netif_dbg(dev, ifup, dev->net,
1201                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1202
1203         if (turbo_mode) {
1204                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1205                 if (ret < 0) {
1206                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1207                         return ret;
1208                 }
1209
1210                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1211
1212                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1213
1214                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1215                 if (ret < 0) {
1216                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1217                         return ret;
1218                 }
1219
1220                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1221                 if (ret < 0) {
1222                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1223                         return ret;
1224                 }
1225
1226                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1227         }
1228
1229         /* set FIFO sizes */
1230         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1231         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1232         if (ret < 0) {
1233                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1234                 return ret;
1235         }
1236
1237         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1238
1239         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1240         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1241         if (ret < 0) {
1242                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1243                 return ret;
1244         }
1245
1246         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1247
1248         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1249         if (ret < 0) {
1250                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1251                 return ret;
1252         }
1253
1254         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1255         if (ret < 0) {
1256                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1257                 return ret;
1258         }
1259
1260         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1261
1262         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1263         if (ret < 0) {
1264                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1265                 return ret;
1266         }
1267
1268         /* only set default GPIO/LED settings if no EEPROM is detected */
1269         if (!(buf & E2P_CMD_LOADED)) {
1270                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1271                 if (ret < 0) {
1272                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1273                         return ret;
1274                 }
1275
1276                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1277                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1278
1279                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1280                 if (ret < 0) {
1281                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1282                         return ret;
1283                 }
1284         }
1285
1286         ret = smsc75xx_write_reg(dev, FLOW, 0);
1287         if (ret < 0) {
1288                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1289                 return ret;
1290         }
1291
1292         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1293         if (ret < 0) {
1294                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1295                 return ret;
1296         }
1297
1298         /* Don't need rfe_ctl_lock during initialisation */
1299         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1300         if (ret < 0) {
1301                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1302                 return ret;
1303         }
1304
1305         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1306
1307         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1308         if (ret < 0) {
1309                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1310                 return ret;
1311         }
1312
1313         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1314         if (ret < 0) {
1315                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1316                 return ret;
1317         }
1318
1319         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1320                   pdata->rfe_ctl);
1321
1322         /* Enable or disable checksum offload engines */
1323         smsc75xx_set_features(dev->net, dev->net->features);
1324
1325         smsc75xx_set_multicast(dev->net);
1326
1327         ret = smsc75xx_phy_initialize(dev);
1328         if (ret < 0) {
1329                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1330                 return ret;
1331         }
1332
1333         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1334         if (ret < 0) {
1335                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1336                 return ret;
1337         }
1338
1339         /* enable PHY interrupts */
1340         buf |= INT_ENP_PHY_INT;
1341
1342         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1343         if (ret < 0) {
1344                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1345                 return ret;
1346         }
1347
1348         /* allow mac to detect speed and duplex from phy */
1349         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1350         if (ret < 0) {
1351                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1352                 return ret;
1353         }
1354
1355         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1356         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1357         if (ret < 0) {
1358                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1359                 return ret;
1360         }
1361
1362         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1365                 return ret;
1366         }
1367
1368         buf |= MAC_TX_TXEN;
1369
1370         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1371         if (ret < 0) {
1372                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1373                 return ret;
1374         }
1375
1376         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1377
1378         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1379         if (ret < 0) {
1380                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1381                 return ret;
1382         }
1383
1384         buf |= FCT_TX_CTL_EN;
1385
1386         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1387         if (ret < 0) {
1388                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1389                 return ret;
1390         }
1391
1392         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1393
1394         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1395         if (ret < 0) {
1396                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1397                 return ret;
1398         }
1399
1400         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1401         if (ret < 0) {
1402                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1403                 return ret;
1404         }
1405
1406         buf |= MAC_RX_RXEN;
1407
1408         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1409         if (ret < 0) {
1410                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1411                 return ret;
1412         }
1413
1414         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1415
1416         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1417         if (ret < 0) {
1418                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1419                 return ret;
1420         }
1421
1422         buf |= FCT_RX_CTL_EN;
1423
1424         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1425         if (ret < 0) {
1426                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1427                 return ret;
1428         }
1429
1430         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1431
1432         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1433         return 0;
1434 }
1435
1436 static const struct net_device_ops smsc75xx_netdev_ops = {
1437         .ndo_open               = usbnet_open,
1438         .ndo_stop               = usbnet_stop,
1439         .ndo_start_xmit         = usbnet_start_xmit,
1440         .ndo_tx_timeout         = usbnet_tx_timeout,
1441         .ndo_get_stats64        = dev_get_tstats64,
1442         .ndo_change_mtu         = smsc75xx_change_mtu,
1443         .ndo_set_mac_address    = eth_mac_addr,
1444         .ndo_validate_addr      = eth_validate_addr,
1445         .ndo_eth_ioctl          = smsc75xx_ioctl,
1446         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1447         .ndo_set_features       = smsc75xx_set_features,
1448 };
1449
1450 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1451 {
1452         struct smsc75xx_priv *pdata = NULL;
1453         int ret;
1454
1455         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1456
1457         ret = usbnet_get_endpoints(dev, intf);
1458         if (ret < 0) {
1459                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1460                 return ret;
1461         }
1462
1463         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1464                                               GFP_KERNEL);
1465
1466         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1467         if (!pdata)
1468                 return -ENOMEM;
1469
1470         pdata->dev = dev;
1471
1472         spin_lock_init(&pdata->rfe_ctl_lock);
1473         mutex_init(&pdata->dataport_mutex);
1474
1475         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1476
1477         if (DEFAULT_TX_CSUM_ENABLE)
1478                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1479
1480         if (DEFAULT_RX_CSUM_ENABLE)
1481                 dev->net->features |= NETIF_F_RXCSUM;
1482
1483         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1484                                 NETIF_F_RXCSUM;
1485
1486         ret = smsc75xx_wait_ready(dev, 0);
1487         if (ret < 0) {
1488                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1489                 goto free_pdata;
1490         }
1491
1492         smsc75xx_init_mac_address(dev);
1493
1494         /* Init all registers */
1495         ret = smsc75xx_reset(dev);
1496         if (ret < 0) {
1497                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1498                 goto cancel_work;
1499         }
1500
1501         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1502         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1503         dev->net->flags |= IFF_MULTICAST;
1504         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1505         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1506         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1507         return 0;
1508
1509 cancel_work:
1510         cancel_work_sync(&pdata->set_multicast);
1511 free_pdata:
1512         kfree(pdata);
1513         dev->data[0] = 0;
1514         return ret;
1515 }
1516
1517 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1518 {
1519         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1520         if (pdata) {
1521                 cancel_work_sync(&pdata->set_multicast);
1522                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1523                 kfree(pdata);
1524                 dev->data[0] = 0;
1525         }
1526 }
1527
1528 static u16 smsc_crc(const u8 *buffer, size_t len)
1529 {
1530         return bitrev16(crc16(0xFFFF, buffer, len));
1531 }
1532
1533 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1534                                u32 wuf_mask1)
1535 {
1536         int cfg_base = WUF_CFGX + filter * 4;
1537         int mask_base = WUF_MASKX + filter * 16;
1538         int ret;
1539
1540         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1541         if (ret < 0) {
1542                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1543                 return ret;
1544         }
1545
1546         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1547         if (ret < 0) {
1548                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1549                 return ret;
1550         }
1551
1552         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1553         if (ret < 0) {
1554                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1555                 return ret;
1556         }
1557
1558         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1559         if (ret < 0) {
1560                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1561                 return ret;
1562         }
1563
1564         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1565         if (ret < 0) {
1566                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1567                 return ret;
1568         }
1569
1570         return 0;
1571 }
1572
1573 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1574 {
1575         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1576         u32 val;
1577         int ret;
1578
1579         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1580         if (ret < 0) {
1581                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1582                 return ret;
1583         }
1584
1585         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1586         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1587
1588         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1589         if (ret < 0) {
1590                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1591                 return ret;
1592         }
1593
1594         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1595
1596         return 0;
1597 }
1598
1599 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1600 {
1601         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1602         u32 val;
1603         int ret;
1604
1605         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1606         if (ret < 0) {
1607                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1608                 return ret;
1609         }
1610
1611         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1612         val |= PMT_CTL_SUS_MODE_1;
1613
1614         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1615         if (ret < 0) {
1616                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1617                 return ret;
1618         }
1619
1620         /* clear wol status, enable energy detection */
1621         val &= ~PMT_CTL_WUPS;
1622         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1623
1624         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625         if (ret < 0) {
1626                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627                 return ret;
1628         }
1629
1630         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1631
1632         return 0;
1633 }
1634
1635 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1636 {
1637         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1638         u32 val;
1639         int ret;
1640
1641         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1642         if (ret < 0) {
1643                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1644                 return ret;
1645         }
1646
1647         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1648         val |= PMT_CTL_SUS_MODE_2;
1649
1650         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1651         if (ret < 0) {
1652                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1653                 return ret;
1654         }
1655
1656         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1657
1658         return 0;
1659 }
1660
1661 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1662 {
1663         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1664         u32 val;
1665         int ret;
1666
1667         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1668         if (ret < 0) {
1669                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1670                 return ret;
1671         }
1672
1673         if (val & FCT_RX_CTL_RXUSED) {
1674                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1675                 return -EBUSY;
1676         }
1677
1678         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1679         if (ret < 0) {
1680                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1681                 return ret;
1682         }
1683
1684         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1685         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1686
1687         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1688         if (ret < 0) {
1689                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1690                 return ret;
1691         }
1692
1693         /* clear wol status */
1694         val &= ~PMT_CTL_WUPS;
1695         val |= PMT_CTL_WUPS_WOL;
1696
1697         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1698         if (ret < 0) {
1699                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1700                 return ret;
1701         }
1702
1703         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1704
1705         return 0;
1706 }
1707
1708 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1709 {
1710         struct mii_if_info *mii = &dev->mii;
1711         int ret;
1712
1713         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1714
1715         /* read to clear */
1716         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1717         if (ret < 0) {
1718                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1719                 return ret;
1720         }
1721
1722         /* enable interrupt source */
1723         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1724         if (ret < 0) {
1725                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1726                 return ret;
1727         }
1728
1729         ret |= mask;
1730
1731         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1732
1733         return 0;
1734 }
1735
1736 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1737 {
1738         struct mii_if_info *mii = &dev->mii;
1739         int ret;
1740
1741         /* first, a dummy read, needed to latch some MII phys */
1742         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1743         if (ret < 0) {
1744                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1745                 return ret;
1746         }
1747
1748         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1749         if (ret < 0) {
1750                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1751                 return ret;
1752         }
1753
1754         return !!(ret & BMSR_LSTATUS);
1755 }
1756
1757 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1758 {
1759         int ret;
1760
1761         if (!netif_running(dev->net)) {
1762                 /* interface is ifconfig down so fully power down hw */
1763                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1764                 return smsc75xx_enter_suspend2(dev);
1765         }
1766
1767         if (!link_up) {
1768                 /* link is down so enter EDPD mode */
1769                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1770
1771                 /* enable PHY wakeup events for if cable is attached */
1772                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1773                         PHY_INT_MASK_ANEG_COMP);
1774                 if (ret < 0) {
1775                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1776                         return ret;
1777                 }
1778
1779                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1780                 return smsc75xx_enter_suspend1(dev);
1781         }
1782
1783         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1784         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1785                 PHY_INT_MASK_LINK_DOWN);
1786         if (ret < 0) {
1787                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1788                 return ret;
1789         }
1790
1791         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1792         return smsc75xx_enter_suspend3(dev);
1793 }
1794
1795 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1796 {
1797         struct usbnet *dev = usb_get_intfdata(intf);
1798         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1799         u32 val, link_up;
1800         int ret;
1801
1802         ret = usbnet_suspend(intf, message);
1803         if (ret < 0) {
1804                 netdev_warn(dev->net, "usbnet_suspend error\n");
1805                 return ret;
1806         }
1807
1808         if (pdata->suspend_flags) {
1809                 netdev_warn(dev->net, "error during last resume\n");
1810                 pdata->suspend_flags = 0;
1811         }
1812
1813         /* determine if link is up using only _nopm functions */
1814         link_up = smsc75xx_link_ok_nopm(dev);
1815
1816         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1817                 ret = smsc75xx_autosuspend(dev, link_up);
1818                 goto done;
1819         }
1820
1821         /* if we get this far we're not autosuspending */
1822         /* if no wol options set, or if link is down and we're not waking on
1823          * PHY activity, enter lowest power SUSPEND2 mode
1824          */
1825         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1826                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1827                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1828
1829                 /* disable energy detect (link up) & wake up events */
1830                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1831                 if (ret < 0) {
1832                         netdev_warn(dev->net, "Error reading WUCSR\n");
1833                         goto done;
1834                 }
1835
1836                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1837
1838                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1839                 if (ret < 0) {
1840                         netdev_warn(dev->net, "Error writing WUCSR\n");
1841                         goto done;
1842                 }
1843
1844                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1845                 if (ret < 0) {
1846                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1847                         goto done;
1848                 }
1849
1850                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1851
1852                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1853                 if (ret < 0) {
1854                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1855                         goto done;
1856                 }
1857
1858                 ret = smsc75xx_enter_suspend2(dev);
1859                 goto done;
1860         }
1861
1862         if (pdata->wolopts & WAKE_PHY) {
1863                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1864                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1865                 if (ret < 0) {
1866                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1867                         goto done;
1868                 }
1869
1870                 /* if link is down then configure EDPD and enter SUSPEND1,
1871                  * otherwise enter SUSPEND0 below
1872                  */
1873                 if (!link_up) {
1874                         struct mii_if_info *mii = &dev->mii;
1875                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1876
1877                         /* enable energy detect power-down mode */
1878                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1879                                 PHY_MODE_CTRL_STS);
1880                         if (ret < 0) {
1881                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1882                                 goto done;
1883                         }
1884
1885                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1886
1887                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1888                                 PHY_MODE_CTRL_STS, ret);
1889
1890                         /* enter SUSPEND1 mode */
1891                         ret = smsc75xx_enter_suspend1(dev);
1892                         goto done;
1893                 }
1894         }
1895
1896         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1897                 int i, filter = 0;
1898
1899                 /* disable all filters */
1900                 for (i = 0; i < WUF_NUM; i++) {
1901                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1902                         if (ret < 0) {
1903                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1904                                 goto done;
1905                         }
1906                 }
1907
1908                 if (pdata->wolopts & WAKE_MCAST) {
1909                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1910                         netdev_info(dev->net, "enabling multicast detection\n");
1911
1912                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1913                                 | smsc_crc(mcast, 3);
1914                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1915                         if (ret < 0) {
1916                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1917                                 goto done;
1918                         }
1919                 }
1920
1921                 if (pdata->wolopts & WAKE_ARP) {
1922                         const u8 arp[] = {0x08, 0x06};
1923                         netdev_info(dev->net, "enabling ARP detection\n");
1924
1925                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1926                                 | smsc_crc(arp, 2);
1927                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1928                         if (ret < 0) {
1929                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1930                                 goto done;
1931                         }
1932                 }
1933
1934                 /* clear any pending pattern match packet status */
1935                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1936                 if (ret < 0) {
1937                         netdev_warn(dev->net, "Error reading WUCSR\n");
1938                         goto done;
1939                 }
1940
1941                 val |= WUCSR_WUFR;
1942
1943                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1944                 if (ret < 0) {
1945                         netdev_warn(dev->net, "Error writing WUCSR\n");
1946                         goto done;
1947                 }
1948
1949                 netdev_info(dev->net, "enabling packet match detection\n");
1950                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1951                 if (ret < 0) {
1952                         netdev_warn(dev->net, "Error reading WUCSR\n");
1953                         goto done;
1954                 }
1955
1956                 val |= WUCSR_WUEN;
1957
1958                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1959                 if (ret < 0) {
1960                         netdev_warn(dev->net, "Error writing WUCSR\n");
1961                         goto done;
1962                 }
1963         } else {
1964                 netdev_info(dev->net, "disabling packet match detection\n");
1965                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1966                 if (ret < 0) {
1967                         netdev_warn(dev->net, "Error reading WUCSR\n");
1968                         goto done;
1969                 }
1970
1971                 val &= ~WUCSR_WUEN;
1972
1973                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1974                 if (ret < 0) {
1975                         netdev_warn(dev->net, "Error writing WUCSR\n");
1976                         goto done;
1977                 }
1978         }
1979
1980         /* disable magic, bcast & unicast wakeup sources */
1981         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1982         if (ret < 0) {
1983                 netdev_warn(dev->net, "Error reading WUCSR\n");
1984                 goto done;
1985         }
1986
1987         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1988
1989         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1990         if (ret < 0) {
1991                 netdev_warn(dev->net, "Error writing WUCSR\n");
1992                 goto done;
1993         }
1994
1995         if (pdata->wolopts & WAKE_PHY) {
1996                 netdev_info(dev->net, "enabling PHY wakeup\n");
1997
1998                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1999                 if (ret < 0) {
2000                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2001                         goto done;
2002                 }
2003
2004                 /* clear wol status, enable energy detection */
2005                 val &= ~PMT_CTL_WUPS;
2006                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2007
2008                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2009                 if (ret < 0) {
2010                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2011                         goto done;
2012                 }
2013         }
2014
2015         if (pdata->wolopts & WAKE_MAGIC) {
2016                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2017                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2018                 if (ret < 0) {
2019                         netdev_warn(dev->net, "Error reading WUCSR\n");
2020                         goto done;
2021                 }
2022
2023                 /* clear any pending magic packet status */
2024                 val |= WUCSR_MPR | WUCSR_MPEN;
2025
2026                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2027                 if (ret < 0) {
2028                         netdev_warn(dev->net, "Error writing WUCSR\n");
2029                         goto done;
2030                 }
2031         }
2032
2033         if (pdata->wolopts & WAKE_BCAST) {
2034                 netdev_info(dev->net, "enabling broadcast detection\n");
2035                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2036                 if (ret < 0) {
2037                         netdev_warn(dev->net, "Error reading WUCSR\n");
2038                         goto done;
2039                 }
2040
2041                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2042
2043                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2044                 if (ret < 0) {
2045                         netdev_warn(dev->net, "Error writing WUCSR\n");
2046                         goto done;
2047                 }
2048         }
2049
2050         if (pdata->wolopts & WAKE_UCAST) {
2051                 netdev_info(dev->net, "enabling unicast detection\n");
2052                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2053                 if (ret < 0) {
2054                         netdev_warn(dev->net, "Error reading WUCSR\n");
2055                         goto done;
2056                 }
2057
2058                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2059
2060                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2061                 if (ret < 0) {
2062                         netdev_warn(dev->net, "Error writing WUCSR\n");
2063                         goto done;
2064                 }
2065         }
2066
2067         /* enable receiver to enable frame reception */
2068         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2069         if (ret < 0) {
2070                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2071                 goto done;
2072         }
2073
2074         val |= MAC_RX_RXEN;
2075
2076         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2077         if (ret < 0) {
2078                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2079                 goto done;
2080         }
2081
2082         /* some wol options are enabled, so enter SUSPEND0 */
2083         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2084         ret = smsc75xx_enter_suspend0(dev);
2085
2086 done:
2087         /*
2088          * TODO: resume() might need to handle the suspend failure
2089          * in system sleep
2090          */
2091         if (ret && PMSG_IS_AUTO(message))
2092                 usbnet_resume(intf);
2093         return ret;
2094 }
2095
2096 static int smsc75xx_resume(struct usb_interface *intf)
2097 {
2098         struct usbnet *dev = usb_get_intfdata(intf);
2099         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2100         u8 suspend_flags = pdata->suspend_flags;
2101         int ret;
2102         u32 val;
2103
2104         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2105
2106         /* do this first to ensure it's cleared even in error case */
2107         pdata->suspend_flags = 0;
2108
2109         if (suspend_flags & SUSPEND_ALLMODES) {
2110                 /* Disable wakeup sources */
2111                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2112                 if (ret < 0) {
2113                         netdev_warn(dev->net, "Error reading WUCSR\n");
2114                         return ret;
2115                 }
2116
2117                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2118                         | WUCSR_BCST_EN);
2119
2120                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2121                 if (ret < 0) {
2122                         netdev_warn(dev->net, "Error writing WUCSR\n");
2123                         return ret;
2124                 }
2125
2126                 /* clear wake-up status */
2127                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2128                 if (ret < 0) {
2129                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2130                         return ret;
2131                 }
2132
2133                 val &= ~PMT_CTL_WOL_EN;
2134                 val |= PMT_CTL_WUPS;
2135
2136                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2137                 if (ret < 0) {
2138                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2139                         return ret;
2140                 }
2141         }
2142
2143         if (suspend_flags & SUSPEND_SUSPEND2) {
2144                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2145
2146                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2147                 if (ret < 0) {
2148                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2149                         return ret;
2150                 }
2151
2152                 val |= PMT_CTL_PHY_PWRUP;
2153
2154                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2155                 if (ret < 0) {
2156                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2157                         return ret;
2158                 }
2159         }
2160
2161         ret = smsc75xx_wait_ready(dev, 1);
2162         if (ret < 0) {
2163                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2164                 return ret;
2165         }
2166
2167         return usbnet_resume(intf);
2168 }
2169
2170 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2171                                      u32 rx_cmd_a, u32 rx_cmd_b)
2172 {
2173         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2174             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2175                 skb->ip_summed = CHECKSUM_NONE;
2176         } else {
2177                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2178                 skb->ip_summed = CHECKSUM_COMPLETE;
2179         }
2180 }
2181
2182 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2183 {
2184         /* This check is no longer done by usbnet */
2185         if (skb->len < dev->net->hard_header_len)
2186                 return 0;
2187
2188         while (skb->len > 0) {
2189                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2190                 struct sk_buff *ax_skb;
2191                 unsigned char *packet;
2192
2193                 rx_cmd_a = get_unaligned_le32(skb->data);
2194                 skb_pull(skb, 4);
2195
2196                 rx_cmd_b = get_unaligned_le32(skb->data);
2197                 skb_pull(skb, 4 + RXW_PADDING);
2198
2199                 packet = skb->data;
2200
2201                 /* get the packet length */
2202                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2203                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2204
2205                 if (unlikely(size > skb->len)) {
2206                         netif_dbg(dev, rx_err, dev->net,
2207                                   "size err rx_cmd_a=0x%08x\n",
2208                                   rx_cmd_a);
2209                         return 0;
2210                 }
2211
2212                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2213                         netif_dbg(dev, rx_err, dev->net,
2214                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2215                         dev->net->stats.rx_errors++;
2216                         dev->net->stats.rx_dropped++;
2217
2218                         if (rx_cmd_a & RX_CMD_A_FCS)
2219                                 dev->net->stats.rx_crc_errors++;
2220                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2221                                 dev->net->stats.rx_frame_errors++;
2222                 } else {
2223                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2224                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2225                                 netif_dbg(dev, rx_err, dev->net,
2226                                           "size err rx_cmd_a=0x%08x\n",
2227                                           rx_cmd_a);
2228                                 return 0;
2229                         }
2230
2231                         /* last frame in this batch */
2232                         if (skb->len == size) {
2233                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2234                                         rx_cmd_b);
2235
2236                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2237                                 skb->truesize = size + sizeof(struct sk_buff);
2238
2239                                 return 1;
2240                         }
2241
2242                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2243                         if (unlikely(!ax_skb)) {
2244                                 netdev_warn(dev->net, "Error allocating skb\n");
2245                                 return 0;
2246                         }
2247
2248                         ax_skb->len = size;
2249                         ax_skb->data = packet;
2250                         skb_set_tail_pointer(ax_skb, size);
2251
2252                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2253                                 rx_cmd_b);
2254
2255                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2256                         ax_skb->truesize = size + sizeof(struct sk_buff);
2257
2258                         usbnet_skb_return(dev, ax_skb);
2259                 }
2260
2261                 skb_pull(skb, size);
2262
2263                 /* padding bytes before the next frame starts */
2264                 if (skb->len)
2265                         skb_pull(skb, align_count);
2266         }
2267
2268         return 1;
2269 }
2270
2271 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2272                                          struct sk_buff *skb, gfp_t flags)
2273 {
2274         u32 tx_cmd_a, tx_cmd_b;
2275         void *ptr;
2276
2277         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2278                 dev_kfree_skb_any(skb);
2279                 return NULL;
2280         }
2281
2282         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2283
2284         if (skb->ip_summed == CHECKSUM_PARTIAL)
2285                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2286
2287         if (skb_is_gso(skb)) {
2288                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2289                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2290
2291                 tx_cmd_a |= TX_CMD_A_LSO;
2292         } else {
2293                 tx_cmd_b = 0;
2294         }
2295
2296         ptr = skb_push(skb, 8);
2297         put_unaligned_le32(tx_cmd_a, ptr);
2298         put_unaligned_le32(tx_cmd_b, ptr + 4);
2299
2300         return skb;
2301 }
2302
2303 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2304 {
2305         dev->intf->needs_remote_wakeup = on;
2306         return 0;
2307 }
2308
2309 static const struct driver_info smsc75xx_info = {
2310         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2311         .bind           = smsc75xx_bind,
2312         .unbind         = smsc75xx_unbind,
2313         .link_reset     = smsc75xx_link_reset,
2314         .reset          = smsc75xx_reset,
2315         .rx_fixup       = smsc75xx_rx_fixup,
2316         .tx_fixup       = smsc75xx_tx_fixup,
2317         .status         = smsc75xx_status,
2318         .manage_power   = smsc75xx_manage_power,
2319         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2320 };
2321
2322 static const struct usb_device_id products[] = {
2323         {
2324                 /* SMSC7500 USB Gigabit Ethernet Device */
2325                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2326                 .driver_info = (unsigned long) &smsc75xx_info,
2327         },
2328         {
2329                 /* SMSC7500 USB Gigabit Ethernet Device */
2330                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2331                 .driver_info = (unsigned long) &smsc75xx_info,
2332         },
2333         { },            /* END */
2334 };
2335 MODULE_DEVICE_TABLE(usb, products);
2336
2337 static struct usb_driver smsc75xx_driver = {
2338         .name           = SMSC_CHIPNAME,
2339         .id_table       = products,
2340         .probe          = usbnet_probe,
2341         .suspend        = smsc75xx_suspend,
2342         .resume         = smsc75xx_resume,
2343         .reset_resume   = smsc75xx_resume,
2344         .disconnect     = usbnet_disconnect,
2345         .disable_hub_initiated_lpm = 1,
2346         .supports_autosuspend = 1,
2347 };
2348
2349 module_usb_driver(smsc75xx_driver);
2350
2351 MODULE_AUTHOR("Nancy Lin");
2352 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2353 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2354 MODULE_LICENSE("GPL");