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 static bool turbo_mode = true;
  65 module_param(turbo_mode, bool, 0644);
  66 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  67
  68 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  69 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  70
  71 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  72                                             u32 *data, int in_pm)
  73 {
  74         u32 buf;
  75         int ret;
  76         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  77
  78         BUG_ON(!dev);
  79
  80         if (!in_pm)
  81                 fn = usbnet_read_cmd;
  82         else
  83                 fn = usbnet_read_cmd_nopm;
  84
  85         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
  86                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  87                  0, index, &buf, 4);
  88         if (unlikely(ret < 4)) {
  89                 ret = ret < 0 ? ret : -ENODATA;
  90
  91                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
  92                             index, ret);
  93                 return ret;
  94         }
  95
  96         le32_to_cpus(&buf);
  97         *data = buf;
  98
  99         return ret;
 100 }
 101
 102 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 103                                              u32 data, int in_pm)
 104 {
 105         u32 buf;
 106         int ret;
 107         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 108
 109         BUG_ON(!dev);
 110
 111         if (!in_pm)
 112                 fn = usbnet_write_cmd;
 113         else
 114                 fn = usbnet_write_cmd_nopm;
 115
 116         buf = data;
 117         cpu_to_le32s(&buf);
 118
 119         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 120                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 121                  0, index, &buf, 4);
 122         if (unlikely(ret < 0))
 123                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 124                             index, ret);
 125
 126         return ret;
 127 }
 128
 129 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 130                                                u32 *data)
 131 {
 132         return __smsc75xx_read_reg(dev, index, data, 1);
 133 }
 134
 135 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 136                                                 u32 data)
 137 {
 138         return __smsc75xx_write_reg(dev, index, data, 1);
 139 }
 140
 141 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 142                                           u32 *data)
 143 {
 144         return __smsc75xx_read_reg(dev, index, data, 0);
 145 }
 146
 147 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 148                                            u32 data)
 149 {
 150         return __smsc75xx_write_reg(dev, index, data, 0);
 151 }
 152
 153 /* Loop until the read is completed with timeout
 154  * called with phy_mutex held */
 155 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 156                                                      int in_pm)
 157 {
 158         unsigned long start_time = jiffies;
 159         u32 val;
 160         int ret;
 161
 162         do {
 163                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 164                 if (ret < 0) {
 165                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 166                         return ret;
 167                 }
 168
 169                 if (!(val & MII_ACCESS_BUSY))
 170                         return 0;
 171         } while (!time_after(jiffies, start_time + HZ));
 172
 173         return -EIO;
 174 }
 175
 176 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 177                                 int in_pm)
 178 {
 179         struct usbnet *dev = netdev_priv(netdev);
 180         u32 val, addr;
 181         int ret;
 182
 183         mutex_lock(&dev->phy_mutex);
 184
 185         /* confirm MII not busy */
 186         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 187         if (ret < 0) {
 188                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 189                 goto done;
 190         }
 191
 192         /* set the address, index & direction (read from PHY) */
 193         phy_id &= dev->mii.phy_id_mask;
 194         idx &= dev->mii.reg_num_mask;
 195         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 196                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 197                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 198         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 201                 goto done;
 202         }
 203
 204         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 205         if (ret < 0) {
 206                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 207                 goto done;
 208         }
 209
 210         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 211         if (ret < 0) {
 212                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 213                 goto done;
 214         }
 215
 216         ret = (u16)(val & 0xFFFF);
 217
 218 done:
 219         mutex_unlock(&dev->phy_mutex);
 220         return ret;
 221 }
 222
 223 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 224                                   int idx, int regval, int in_pm)
 225 {
 226         struct usbnet *dev = netdev_priv(netdev);
 227         u32 val, addr;
 228         int ret;
 229
 230         mutex_lock(&dev->phy_mutex);
 231
 232         /* confirm MII not busy */
 233         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 234         if (ret < 0) {
 235                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 236                 goto done;
 237         }
 238
 239         val = regval;
 240         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 241         if (ret < 0) {
 242                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 243                 goto done;
 244         }
 245
 246         /* set the address, index & direction (write to PHY) */
 247         phy_id &= dev->mii.phy_id_mask;
 248         idx &= dev->mii.reg_num_mask;
 249         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 250                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 251                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 252         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 255                 goto done;
 256         }
 257
 258         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 259         if (ret < 0) {
 260                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 261                 goto done;
 262         }
 263
 264 done:
 265         mutex_unlock(&dev->phy_mutex);
 266 }
 267
 268 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 269                                    int idx)
 270 {
 271         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 272 }
 273
 274 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 275                                      int idx, int regval)
 276 {
 277         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 278 }
 279
 280 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 281 {
 282         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 283 }
 284
 285 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 286                                 int regval)
 287 {
 288         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 289 }
 290
 291 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 292 {
 293         unsigned long start_time = jiffies;
 294         u32 val;
 295         int ret;
 296
 297         do {
 298                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 299                 if (ret < 0) {
 300                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 301                         return ret;
 302                 }
 303
 304                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 305                         break;
 306                 udelay(40);
 307         } while (!time_after(jiffies, start_time + HZ));
 308
 309         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 310                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 311                 return -EIO;
 312         }
 313
 314         return 0;
 315 }
 316
 317 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 318 {
 319         unsigned long start_time = jiffies;
 320         u32 val;
 321         int ret;
 322
 323         do {
 324                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 325                 if (ret < 0) {
 326                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 327                         return ret;
 328                 }
 329
 330                 if (!(val & E2P_CMD_BUSY))
 331                         return 0;
 332
 333                 udelay(40);
 334         } while (!time_after(jiffies, start_time + HZ));
 335
 336         netdev_warn(dev->net, "EEPROM is busy\n");
 337         return -EIO;
 338 }
 339
 340 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 341                                 u8 *data)
 342 {
 343         u32 val;
 344         int i, ret;
 345
 346         BUG_ON(!dev);
 347         BUG_ON(!data);
 348
 349         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 350         if (ret)
 351                 return ret;
 352
 353         for (i = 0; i < length; i++) {
 354                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 355                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 356                 if (ret < 0) {
 357                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 358                         return ret;
 359                 }
 360
 361                 ret = smsc75xx_wait_eeprom(dev);
 362                 if (ret < 0)
 363                         return ret;
 364
 365                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 366                 if (ret < 0) {
 367                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 368                         return ret;
 369                 }
 370
 371                 data[i] = val & 0xFF;
 372                 offset++;
 373         }
 374
 375         return 0;
 376 }
 377
 378 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 379                                  u8 *data)
 380 {
 381         u32 val;
 382         int i, ret;
 383
 384         BUG_ON(!dev);
 385         BUG_ON(!data);
 386
 387         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 388         if (ret)
 389                 return ret;
 390
 391         /* Issue write/erase enable command */
 392         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 393         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 394         if (ret < 0) {
 395                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 396                 return ret;
 397         }
 398
 399         ret = smsc75xx_wait_eeprom(dev);
 400         if (ret < 0)
 401                 return ret;
 402
 403         for (i = 0; i < length; i++) {
 404
 405                 /* Fill data register */
 406                 val = data[i];
 407                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 408                 if (ret < 0) {
 409                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 410                         return ret;
 411                 }
 412
 413                 /* Send "write" command */
 414                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 415                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 416                 if (ret < 0) {
 417                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 418                         return ret;
 419                 }
 420
 421                 ret = smsc75xx_wait_eeprom(dev);
 422                 if (ret < 0)
 423                         return ret;
 424
 425                 offset++;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 432 {
 433         int i, ret;
 434
 435         for (i = 0; i < 100; i++) {
 436                 u32 dp_sel;
 437                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 438                 if (ret < 0) {
 439                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 440                         return ret;
 441                 }
 442
 443                 if (dp_sel & DP_SEL_DPRDY)
 444                         return 0;
 445
 446                 udelay(40);
 447         }
 448
 449         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 450
 451         return -EIO;
 452 }
 453
 454 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 455                                    u32 length, u32 *buf)
 456 {
 457         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 458         u32 dp_sel;
 459         int i, ret;
 460
 461         mutex_lock(&pdata->dataport_mutex);
 462
 463         ret = smsc75xx_dataport_wait_not_busy(dev);
 464         if (ret < 0) {
 465                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 466                 goto done;
 467         }
 468
 469         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 470         if (ret < 0) {
 471                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 472                 goto done;
 473         }
 474
 475         dp_sel &= ~DP_SEL_RSEL;
 476         dp_sel |= ram_select;
 477         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 478         if (ret < 0) {
 479                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 480                 goto done;
 481         }
 482
 483         for (i = 0; i < length; i++) {
 484                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 485                 if (ret < 0) {
 486                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 487                         goto done;
 488                 }
 489
 490                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 491                 if (ret < 0) {
 492                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 493                         goto done;
 494                 }
 495
 496                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 497                 if (ret < 0) {
 498                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 499                         goto done;
 500                 }
 501
 502                 ret = smsc75xx_dataport_wait_not_busy(dev);
 503                 if (ret < 0) {
 504                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 505                         goto done;
 506                 }
 507         }
 508
 509 done:
 510         mutex_unlock(&pdata->dataport_mutex);
 511         return ret;
 512 }
 513
 514 /* returns hash bit number for given MAC address */
 515 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 516 {
 517         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 518 }
 519
 520 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 521 {
 522         struct smsc75xx_priv *pdata =
 523                 container_of(param, struct smsc75xx_priv, set_multicast);
 524         struct usbnet *dev = pdata->dev;
 525         int ret;
 526
 527         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 528                   pdata->rfe_ctl);
 529
 530         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 531                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 532
 533         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 534         if (ret < 0)
 535                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 536 }
 537
 538 static void smsc75xx_set_multicast(struct net_device *netdev)
 539 {
 540         struct usbnet *dev = netdev_priv(netdev);
 541         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 542         unsigned long flags;
 543         int i;
 544
 545         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 546
 547         pdata->rfe_ctl &=
 548                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 549         pdata->rfe_ctl |= RFE_CTL_AB;
 550
 551         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 552                 pdata->multicast_hash_table[i] = 0;
 553
 554         if (dev->net->flags & IFF_PROMISC) {
 555                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 556                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 557         } else if (dev->net->flags & IFF_ALLMULTI) {
 558                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 559                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 560         } else if (!netdev_mc_empty(dev->net)) {
 561                 struct netdev_hw_addr *ha;
 562
 563                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 564
 565                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 566
 567                 netdev_for_each_mc_addr(ha, netdev) {
 568                         u32 bitnum = smsc75xx_hash(ha->addr);
 569                         pdata->multicast_hash_table[bitnum / 32] |=
 570                                 (1 << (bitnum % 32));
 571                 }
 572         } else {
 573                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 574                 pdata->rfe_ctl |= RFE_CTL_DPF;
 575         }
 576
 577         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 578
 579         /* defer register writes to a sleepable context */
 580         schedule_work(&pdata->set_multicast);
 581 }
 582
 583 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 584                                             u16 lcladv, u16 rmtadv)
 585 {
 586         u32 flow = 0, fct_flow = 0;
 587         int ret;
 588
 589         if (duplex == DUPLEX_FULL) {
 590                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 591
 592                 if (cap & FLOW_CTRL_TX) {
 593                         flow = (FLOW_TX_FCEN | 0xFFFF);
 594                         /* set fct_flow thresholds to 20% and 80% */
 595                         fct_flow = (8 << 8) | 32;
 596                 }
 597
 598                 if (cap & FLOW_CTRL_RX)
 599                         flow |= FLOW_RX_FCEN;
 600
 601                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 602                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 603                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 604         } else {
 605                 netif_dbg(dev, link, dev->net, "half duplex\n");
 606         }
 607
 608         ret = smsc75xx_write_reg(dev, FLOW, flow);
 609         if (ret < 0) {
 610                 netdev_warn(dev->net, "Error writing FLOW\n");
 611                 return ret;
 612         }
 613
 614         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 615         if (ret < 0) {
 616                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 617                 return ret;
 618         }
 619
 620         return 0;
 621 }
 622
 623 static int smsc75xx_link_reset(struct usbnet *dev)
 624 {
 625         struct mii_if_info *mii = &dev->mii;
 626         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 627         u16 lcladv, rmtadv;
 628         int ret;
 629
 630         /* write to clear phy interrupt status */
 631         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 632                 PHY_INT_SRC_CLEAR_ALL);
 633
 634         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 635         if (ret < 0) {
 636                 netdev_warn(dev->net, "Error writing INT_STS\n");
 637                 return ret;
 638         }
 639
 640         mii_check_media(mii, 1, 1);
 641         mii_ethtool_gset(&dev->mii, &ecmd);
 642         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 643         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 644
 645         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 646                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 647
 648         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 649 }
 650
 651 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 652 {
 653         u32 intdata;
 654
 655         if (urb->actual_length != 4) {
 656                 netdev_warn(dev->net, "unexpected urb length %d\n",
 657                             urb->actual_length);
 658                 return;
 659         }
 660
 661         intdata = get_unaligned_le32(urb->transfer_buffer);
 662
 663         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 664
 665         if (intdata & INT_ENP_PHY_INT)
 666                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 667         else
 668                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 669                             intdata);
 670 }
 671
 672 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 673 {
 674         return MAX_EEPROM_SIZE;
 675 }
 676
 677 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 678                                        struct ethtool_eeprom *ee, u8 *data)
 679 {
 680         struct usbnet *dev = netdev_priv(netdev);
 681
 682         ee->magic = LAN75XX_EEPROM_MAGIC;
 683
 684         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 685 }
 686
 687 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 688                                        struct ethtool_eeprom *ee, u8 *data)
 689 {
 690         struct usbnet *dev = netdev_priv(netdev);
 691
 692         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 693                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 694                             ee->magic);
 695                 return -EINVAL;
 696         }
 697
 698         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 699 }
 700
 701 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 702                                      struct ethtool_wolinfo *wolinfo)
 703 {
 704         struct usbnet *dev = netdev_priv(net);
 705         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 706
 707         wolinfo->supported = SUPPORTED_WAKE;
 708         wolinfo->wolopts = pdata->wolopts;
 709 }
 710
 711 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 712                                     struct ethtool_wolinfo *wolinfo)
 713 {
 714         struct usbnet *dev = netdev_priv(net);
 715         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 716         int ret;
 717
 718         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 719                 return -EINVAL;
 720
 721         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 722
 723         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 724         if (ret < 0)
 725                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 726
 727         return ret;
 728 }
 729
 730 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 731         .get_link       = usbnet_get_link,
 732         .nway_reset     = usbnet_nway_reset,
 733         .get_drvinfo    = usbnet_get_drvinfo,
 734         .get_msglevel   = usbnet_get_msglevel,
 735         .set_msglevel   = usbnet_set_msglevel,
 736         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 737         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 738         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 739         .get_wol        = smsc75xx_ethtool_get_wol,
 740         .set_wol        = smsc75xx_ethtool_set_wol,
 741         .get_link_ksettings     = usbnet_get_link_ksettings_mii,
 742         .set_link_ksettings     = usbnet_set_link_ksettings_mii,
 743 };
 744
 745 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 746 {
 747         struct usbnet *dev = netdev_priv(netdev);
 748
 749         if (!netif_running(netdev))
 750                 return -EINVAL;
 751
 752         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 753 }
 754
 755 static void smsc75xx_init_mac_address(struct usbnet *dev)
 756 {
 757         u8 addr[ETH_ALEN];
 758
 759         /* maybe the boot loader passed the MAC address in devicetree */
 760         if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
 761                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 762                         /* device tree values are valid so use them */
 763                         netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 764                         return;
 765                 }
 766         }
 767
 768         /* try reading mac address from EEPROM */
 769         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
 770                 eth_hw_addr_set(dev->net, addr);
 771                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 772                         /* eeprom values are valid so use them */
 773                         netif_dbg(dev, ifup, dev->net,
 774                                   "MAC address read from EEPROM\n");
 775                         return;
 776                 }
 777         }
 778
 779         /* no useful static MAC address found. generate a random one */
 780         eth_hw_addr_random(dev->net);
 781         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 782 }
 783
 784 static int smsc75xx_set_mac_address(struct usbnet *dev)
 785 {
 786         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 787                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 788         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 789
 790         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 791         if (ret < 0) {
 792                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 793                 return ret;
 794         }
 795
 796         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 797         if (ret < 0) {
 798                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 799                 return ret;
 800         }
 801
 802         addr_hi |= ADDR_FILTX_FB_VALID;
 803         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 804         if (ret < 0) {
 805                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 806                 return ret;
 807         }
 808
 809         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 810         if (ret < 0)
 811                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 812
 813         return ret;
 814 }
 815
 816 static int smsc75xx_phy_initialize(struct usbnet *dev)
 817 {
 818         int bmcr, ret, timeout = 0;
 819
 820         /* Initialize MII structure */
 821         dev->mii.dev = dev->net;
 822         dev->mii.mdio_read = smsc75xx_mdio_read;
 823         dev->mii.mdio_write = smsc75xx_mdio_write;
 824         dev->mii.phy_id_mask = 0x1f;
 825         dev->mii.reg_num_mask = 0x1f;
 826         dev->mii.supports_gmii = 1;
 827         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 828
 829         /* reset phy and wait for reset to complete */
 830         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 831
 832         do {
 833                 msleep(10);
 834                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 835                 if (bmcr < 0) {
 836                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 837                         return bmcr;
 838                 }
 839                 timeout++;
 840         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 841
 842         if (timeout >= 100) {
 843                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 844                 return -EIO;
 845         }
 846
 847         /* phy workaround for gig link */
 848         smsc75xx_phy_gig_workaround(dev);
 849
 850         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 851                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 852                 ADVERTISE_PAUSE_ASYM);
 853         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 854                 ADVERTISE_1000FULL);
 855
 856         /* read and write to clear phy interrupt status */
 857         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 858         if (ret < 0) {
 859                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 860                 return ret;
 861         }
 862
 863         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 864
 865         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 866                 PHY_INT_MASK_DEFAULT);
 867         mii_nway_restart(&dev->mii);
 868
 869         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 870         return 0;
 871 }
 872
 873 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 874 {
 875         int ret = 0;
 876         u32 buf;
 877         bool rxenabled;
 878
 879         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 880         if (ret < 0) {
 881                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 882                 return ret;
 883         }
 884
 885         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 886
 887         if (rxenabled) {
 888                 buf &= ~MAC_RX_RXEN;
 889                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 890                 if (ret < 0) {
 891                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 892                         return ret;
 893                 }
 894         }
 895
 896         /* add 4 to size for FCS */
 897         buf &= ~MAC_RX_MAX_SIZE;
 898         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 899
 900         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 901         if (ret < 0) {
 902                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 903                 return ret;
 904         }
 905
 906         if (rxenabled) {
 907                 buf |= MAC_RX_RXEN;
 908                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 909                 if (ret < 0) {
 910                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 911                         return ret;
 912                 }
 913         }
 914
 915         return 0;
 916 }
 917
 918 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 919 {
 920         struct usbnet *dev = netdev_priv(netdev);
 921         int ret;
 922
 923         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 924         if (ret < 0) {
 925                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 926                 return ret;
 927         }
 928
 929         return usbnet_change_mtu(netdev, new_mtu);
 930 }
 931
 932 /* Enable or disable Rx checksum offload engine */
 933 static int smsc75xx_set_features(struct net_device *netdev,
 934         netdev_features_t features)
 935 {
 936         struct usbnet *dev = netdev_priv(netdev);
 937         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 938         unsigned long flags;
 939         int ret;
 940
 941         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 942
 943         if (features & NETIF_F_RXCSUM)
 944                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 945         else
 946                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 947
 948         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 949         /* it's racing here! */
 950
 951         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 952         if (ret < 0) {
 953                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 954                 return ret;
 955         }
 956         return 0;
 957 }
 958
 959 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 960 {
 961         int timeout = 0;
 962
 963         do {
 964                 u32 buf;
 965                 int ret;
 966
 967                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 968
 969                 if (ret < 0) {
 970                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 971                         return ret;
 972                 }
 973
 974                 if (buf & PMT_CTL_DEV_RDY)
 975                         return 0;
 976
 977                 msleep(10);
 978                 timeout++;
 979         } while (timeout < 100);
 980
 981         netdev_warn(dev->net, "timeout waiting for device ready\n");
 982         return -EIO;
 983 }
 984
 985 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 986 {
 987         struct mii_if_info *mii = &dev->mii;
 988         int ret = 0, timeout = 0;
 989         u32 buf, link_up = 0;
 990
 991         /* Set the phy in Gig loopback */
 992         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 993
 994         /* Wait for the link up */
 995         do {
 996                 link_up = smsc75xx_link_ok_nopm(dev);
 997                 usleep_range(10000, 20000);
 998                 timeout++;
 999         } while ((!link_up) && (timeout < 1000));
1000
1001         if (timeout >= 1000) {
1002                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1003                 return -EIO;
1004         }
1005
1006         /* phy reset */
1007         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1008         if (ret < 0) {
1009                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1010                 return ret;
1011         }
1012
1013         buf |= PMT_CTL_PHY_RST;
1014
1015         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1016         if (ret < 0) {
1017                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1018                 return ret;
1019         }
1020
1021         timeout = 0;
1022         do {
1023                 usleep_range(10000, 20000);
1024                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1025                 if (ret < 0) {
1026                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1027                                     ret);
1028                         return ret;
1029                 }
1030                 timeout++;
1031         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1032
1033         if (timeout >= 100) {
1034                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1035                 return -EIO;
1036         }
1037
1038         return 0;
1039 }
1040
1041 static int smsc75xx_reset(struct usbnet *dev)
1042 {
1043         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1044         u32 buf;
1045         int ret = 0, timeout;
1046
1047         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1048
1049         ret = smsc75xx_wait_ready(dev, 0);
1050         if (ret < 0) {
1051                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1052                 return ret;
1053         }
1054
1055         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1056         if (ret < 0) {
1057                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1058                 return ret;
1059         }
1060
1061         buf |= HW_CFG_LRST;
1062
1063         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1064         if (ret < 0) {
1065                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1066                 return ret;
1067         }
1068
1069         timeout = 0;
1070         do {
1071                 msleep(10);
1072                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1073                 if (ret < 0) {
1074                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1075                         return ret;
1076                 }
1077                 timeout++;
1078         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1079
1080         if (timeout >= 100) {
1081                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1082                 return -EIO;
1083         }
1084
1085         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1086
1087         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1088         if (ret < 0) {
1089                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1090                 return ret;
1091         }
1092
1093         buf |= PMT_CTL_PHY_RST;
1094
1095         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1096         if (ret < 0) {
1097                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1098                 return ret;
1099         }
1100
1101         timeout = 0;
1102         do {
1103                 msleep(10);
1104                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1105                 if (ret < 0) {
1106                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1107                         return ret;
1108                 }
1109                 timeout++;
1110         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1111
1112         if (timeout >= 100) {
1113                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1114                 return -EIO;
1115         }
1116
1117         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1118
1119         ret = smsc75xx_set_mac_address(dev);
1120         if (ret < 0) {
1121                 netdev_warn(dev->net, "Failed to set mac address\n");
1122                 return ret;
1123         }
1124
1125         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1126                   dev->net->dev_addr);
1127
1128         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1129         if (ret < 0) {
1130                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1131                 return ret;
1132         }
1133
1134         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1135                   buf);
1136
1137         buf |= HW_CFG_BIR;
1138
1139         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1140         if (ret < 0) {
1141                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1142                 return ret;
1143         }
1144
1145         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1146         if (ret < 0) {
1147                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1148                 return ret;
1149         }
1150
1151         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1152                   buf);
1153
1154         if (!turbo_mode) {
1155                 buf = 0;
1156                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1157         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1158                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1159                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1160         } else {
1161                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1162                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1163         }
1164
1165         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1166                   (ulong)dev->rx_urb_size);
1167
1168         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1169         if (ret < 0) {
1170                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1171                 return ret;
1172         }
1173
1174         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1175         if (ret < 0) {
1176                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1177                 return ret;
1178         }
1179
1180         netif_dbg(dev, ifup, dev->net,
1181                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1182
1183         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1184         if (ret < 0) {
1185                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1186                 return ret;
1187         }
1188
1189         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1190         if (ret < 0) {
1191                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1192                 return ret;
1193         }
1194
1195         netif_dbg(dev, ifup, dev->net,
1196                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1197
1198         if (turbo_mode) {
1199                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1200                 if (ret < 0) {
1201                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1202                         return ret;
1203                 }
1204
1205                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1206
1207                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1208
1209                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1210                 if (ret < 0) {
1211                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1212                         return ret;
1213                 }
1214
1215                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1216                 if (ret < 0) {
1217                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1218                         return ret;
1219                 }
1220
1221                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1222         }
1223
1224         /* set FIFO sizes */
1225         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1226         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1227         if (ret < 0) {
1228                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1229                 return ret;
1230         }
1231
1232         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1233
1234         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1235         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1236         if (ret < 0) {
1237                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1238                 return ret;
1239         }
1240
1241         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1242
1243         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1244         if (ret < 0) {
1245                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1246                 return ret;
1247         }
1248
1249         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1250         if (ret < 0) {
1251                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1252                 return ret;
1253         }
1254
1255         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1256
1257         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1258         if (ret < 0) {
1259                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1260                 return ret;
1261         }
1262
1263         /* only set default GPIO/LED settings if no EEPROM is detected */
1264         if (!(buf & E2P_CMD_LOADED)) {
1265                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1266                 if (ret < 0) {
1267                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1268                         return ret;
1269                 }
1270
1271                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1272                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1273
1274                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1275                 if (ret < 0) {
1276                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1277                         return ret;
1278                 }
1279         }
1280
1281         ret = smsc75xx_write_reg(dev, FLOW, 0);
1282         if (ret < 0) {
1283                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1284                 return ret;
1285         }
1286
1287         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1288         if (ret < 0) {
1289                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1290                 return ret;
1291         }
1292
1293         /* Don't need rfe_ctl_lock during initialisation */
1294         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1295         if (ret < 0) {
1296                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1297                 return ret;
1298         }
1299
1300         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1301
1302         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1303         if (ret < 0) {
1304                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1305                 return ret;
1306         }
1307
1308         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1309         if (ret < 0) {
1310                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1311                 return ret;
1312         }
1313
1314         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1315                   pdata->rfe_ctl);
1316
1317         /* Enable or disable checksum offload engines */
1318         smsc75xx_set_features(dev->net, dev->net->features);
1319
1320         smsc75xx_set_multicast(dev->net);
1321
1322         ret = smsc75xx_phy_initialize(dev);
1323         if (ret < 0) {
1324                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1325                 return ret;
1326         }
1327
1328         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1329         if (ret < 0) {
1330                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1331                 return ret;
1332         }
1333
1334         /* enable PHY interrupts */
1335         buf |= INT_ENP_PHY_INT;
1336
1337         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1338         if (ret < 0) {
1339                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1340                 return ret;
1341         }
1342
1343         /* allow mac to detect speed and duplex from phy */
1344         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1345         if (ret < 0) {
1346                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1347                 return ret;
1348         }
1349
1350         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1351         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1352         if (ret < 0) {
1353                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1354                 return ret;
1355         }
1356
1357         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1358         if (ret < 0) {
1359                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1360                 return ret;
1361         }
1362
1363         buf |= MAC_TX_TXEN;
1364
1365         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1366         if (ret < 0) {
1367                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1368                 return ret;
1369         }
1370
1371         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1372
1373         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1374         if (ret < 0) {
1375                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1376                 return ret;
1377         }
1378
1379         buf |= FCT_TX_CTL_EN;
1380
1381         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1382         if (ret < 0) {
1383                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1384                 return ret;
1385         }
1386
1387         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1388
1389         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1390         if (ret < 0) {
1391                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1392                 return ret;
1393         }
1394
1395         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1396         if (ret < 0) {
1397                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1398                 return ret;
1399         }
1400
1401         buf |= MAC_RX_RXEN;
1402
1403         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1404         if (ret < 0) {
1405                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1406                 return ret;
1407         }
1408
1409         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1410
1411         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1412         if (ret < 0) {
1413                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1414                 return ret;
1415         }
1416
1417         buf |= FCT_RX_CTL_EN;
1418
1419         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1420         if (ret < 0) {
1421                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1422                 return ret;
1423         }
1424
1425         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1426
1427         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1428         return 0;
1429 }
1430
1431 static const struct net_device_ops smsc75xx_netdev_ops = {
1432         .ndo_open               = usbnet_open,
1433         .ndo_stop               = usbnet_stop,
1434         .ndo_start_xmit         = usbnet_start_xmit,
1435         .ndo_tx_timeout         = usbnet_tx_timeout,
1436         .ndo_get_stats64        = dev_get_tstats64,
1437         .ndo_change_mtu         = smsc75xx_change_mtu,
1438         .ndo_set_mac_address    = eth_mac_addr,
1439         .ndo_validate_addr      = eth_validate_addr,
1440         .ndo_eth_ioctl          = smsc75xx_ioctl,
1441         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1442         .ndo_set_features       = smsc75xx_set_features,
1443 };
1444
1445 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1446 {
1447         struct smsc75xx_priv *pdata = NULL;
1448         int ret;
1449
1450         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1451
1452         ret = usbnet_get_endpoints(dev, intf);
1453         if (ret < 0) {
1454                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1455                 return ret;
1456         }
1457
1458         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1459                                               GFP_KERNEL);
1460
1461         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1462         if (!pdata)
1463                 return -ENOMEM;
1464
1465         pdata->dev = dev;
1466
1467         spin_lock_init(&pdata->rfe_ctl_lock);
1468         mutex_init(&pdata->dataport_mutex);
1469
1470         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1471
1472         if (DEFAULT_TX_CSUM_ENABLE)
1473                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1474
1475         if (DEFAULT_RX_CSUM_ENABLE)
1476                 dev->net->features |= NETIF_F_RXCSUM;
1477
1478         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1479                                 NETIF_F_RXCSUM;
1480
1481         ret = smsc75xx_wait_ready(dev, 0);
1482         if (ret < 0) {
1483                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1484                 goto free_pdata;
1485         }
1486
1487         smsc75xx_init_mac_address(dev);
1488
1489         /* Init all registers */
1490         ret = smsc75xx_reset(dev);
1491         if (ret < 0) {
1492                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1493                 goto cancel_work;
1494         }
1495
1496         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1497         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1498         dev->net->flags |= IFF_MULTICAST;
1499         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1500         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1501         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1502         return 0;
1503
1504 cancel_work:
1505         cancel_work_sync(&pdata->set_multicast);
1506 free_pdata:
1507         kfree(pdata);
1508         dev->data[0] = 0;
1509         return ret;
1510 }
1511
1512 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1513 {
1514         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1515         if (pdata) {
1516                 cancel_work_sync(&pdata->set_multicast);
1517                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1518                 kfree(pdata);
1519                 dev->data[0] = 0;
1520         }
1521 }
1522
1523 static u16 smsc_crc(const u8 *buffer, size_t len)
1524 {
1525         return bitrev16(crc16(0xFFFF, buffer, len));
1526 }
1527
1528 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1529                                u32 wuf_mask1)
1530 {
1531         int cfg_base = WUF_CFGX + filter * 4;
1532         int mask_base = WUF_MASKX + filter * 16;
1533         int ret;
1534
1535         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1536         if (ret < 0) {
1537                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1538                 return ret;
1539         }
1540
1541         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1542         if (ret < 0) {
1543                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1544                 return ret;
1545         }
1546
1547         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1548         if (ret < 0) {
1549                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1550                 return ret;
1551         }
1552
1553         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1554         if (ret < 0) {
1555                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1556                 return ret;
1557         }
1558
1559         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1560         if (ret < 0) {
1561                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1562                 return ret;
1563         }
1564
1565         return 0;
1566 }
1567
1568 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1569 {
1570         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1571         u32 val;
1572         int ret;
1573
1574         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1575         if (ret < 0) {
1576                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1577                 return ret;
1578         }
1579
1580         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1581         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1582
1583         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1584         if (ret < 0) {
1585                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1586                 return ret;
1587         }
1588
1589         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1590
1591         return 0;
1592 }
1593
1594 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1595 {
1596         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1597         u32 val;
1598         int ret;
1599
1600         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1601         if (ret < 0) {
1602                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1603                 return ret;
1604         }
1605
1606         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1607         val |= PMT_CTL_SUS_MODE_1;
1608
1609         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1610         if (ret < 0) {
1611                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1612                 return ret;
1613         }
1614
1615         /* clear wol status, enable energy detection */
1616         val &= ~PMT_CTL_WUPS;
1617         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1618
1619         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1620         if (ret < 0) {
1621                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1622                 return ret;
1623         }
1624
1625         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1626
1627         return 0;
1628 }
1629
1630 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1631 {
1632         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1633         u32 val;
1634         int ret;
1635
1636         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1637         if (ret < 0) {
1638                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1639                 return ret;
1640         }
1641
1642         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1643         val |= PMT_CTL_SUS_MODE_2;
1644
1645         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1646         if (ret < 0) {
1647                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1648                 return ret;
1649         }
1650
1651         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1652
1653         return 0;
1654 }
1655
1656 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1657 {
1658         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1659         u32 val;
1660         int ret;
1661
1662         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1663         if (ret < 0) {
1664                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1665                 return ret;
1666         }
1667
1668         if (val & FCT_RX_CTL_RXUSED) {
1669                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1670                 return -EBUSY;
1671         }
1672
1673         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1674         if (ret < 0) {
1675                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1676                 return ret;
1677         }
1678
1679         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1680         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1681
1682         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1683         if (ret < 0) {
1684                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1685                 return ret;
1686         }
1687
1688         /* clear wol status */
1689         val &= ~PMT_CTL_WUPS;
1690         val |= PMT_CTL_WUPS_WOL;
1691
1692         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1693         if (ret < 0) {
1694                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1695                 return ret;
1696         }
1697
1698         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1699
1700         return 0;
1701 }
1702
1703 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1704 {
1705         struct mii_if_info *mii = &dev->mii;
1706         int ret;
1707
1708         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1709
1710         /* read to clear */
1711         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1712         if (ret < 0) {
1713                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1714                 return ret;
1715         }
1716
1717         /* enable interrupt source */
1718         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1719         if (ret < 0) {
1720                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1721                 return ret;
1722         }
1723
1724         ret |= mask;
1725
1726         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1727
1728         return 0;
1729 }
1730
1731 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1732 {
1733         struct mii_if_info *mii = &dev->mii;
1734         int ret;
1735
1736         /* first, a dummy read, needed to latch some MII phys */
1737         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1738         if (ret < 0) {
1739                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1740                 return ret;
1741         }
1742
1743         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1744         if (ret < 0) {
1745                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1746                 return ret;
1747         }
1748
1749         return !!(ret & BMSR_LSTATUS);
1750 }
1751
1752 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1753 {
1754         int ret;
1755
1756         if (!netif_running(dev->net)) {
1757                 /* interface is ifconfig down so fully power down hw */
1758                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1759                 return smsc75xx_enter_suspend2(dev);
1760         }
1761
1762         if (!link_up) {
1763                 /* link is down so enter EDPD mode */
1764                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1765
1766                 /* enable PHY wakeup events for if cable is attached */
1767                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1768                         PHY_INT_MASK_ANEG_COMP);
1769                 if (ret < 0) {
1770                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1771                         return ret;
1772                 }
1773
1774                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1775                 return smsc75xx_enter_suspend1(dev);
1776         }
1777
1778         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1779         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1780                 PHY_INT_MASK_LINK_DOWN);
1781         if (ret < 0) {
1782                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1783                 return ret;
1784         }
1785
1786         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1787         return smsc75xx_enter_suspend3(dev);
1788 }
1789
1790 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1791 {
1792         struct usbnet *dev = usb_get_intfdata(intf);
1793         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1794         u32 val, link_up;
1795         int ret;
1796
1797         ret = usbnet_suspend(intf, message);
1798         if (ret < 0) {
1799                 netdev_warn(dev->net, "usbnet_suspend error\n");
1800                 return ret;
1801         }
1802
1803         if (pdata->suspend_flags) {
1804                 netdev_warn(dev->net, "error during last resume\n");
1805                 pdata->suspend_flags = 0;
1806         }
1807
1808         /* determine if link is up using only _nopm functions */
1809         link_up = smsc75xx_link_ok_nopm(dev);
1810
1811         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1812                 ret = smsc75xx_autosuspend(dev, link_up);
1813                 goto done;
1814         }
1815
1816         /* if we get this far we're not autosuspending */
1817         /* if no wol options set, or if link is down and we're not waking on
1818          * PHY activity, enter lowest power SUSPEND2 mode
1819          */
1820         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1821                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1822                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1823
1824                 /* disable energy detect (link up) & wake up events */
1825                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1826                 if (ret < 0) {
1827                         netdev_warn(dev->net, "Error reading WUCSR\n");
1828                         goto done;
1829                 }
1830
1831                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1832
1833                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1834                 if (ret < 0) {
1835                         netdev_warn(dev->net, "Error writing WUCSR\n");
1836                         goto done;
1837                 }
1838
1839                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1840                 if (ret < 0) {
1841                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1842                         goto done;
1843                 }
1844
1845                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1846
1847                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1848                 if (ret < 0) {
1849                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1850                         goto done;
1851                 }
1852
1853                 ret = smsc75xx_enter_suspend2(dev);
1854                 goto done;
1855         }
1856
1857         if (pdata->wolopts & WAKE_PHY) {
1858                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1859                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1860                 if (ret < 0) {
1861                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1862                         goto done;
1863                 }
1864
1865                 /* if link is down then configure EDPD and enter SUSPEND1,
1866                  * otherwise enter SUSPEND0 below
1867                  */
1868                 if (!link_up) {
1869                         struct mii_if_info *mii = &dev->mii;
1870                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1871
1872                         /* enable energy detect power-down mode */
1873                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1874                                 PHY_MODE_CTRL_STS);
1875                         if (ret < 0) {
1876                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1877                                 goto done;
1878                         }
1879
1880                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1881
1882                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1883                                 PHY_MODE_CTRL_STS, ret);
1884
1885                         /* enter SUSPEND1 mode */
1886                         ret = smsc75xx_enter_suspend1(dev);
1887                         goto done;
1888                 }
1889         }
1890
1891         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1892                 int i, filter = 0;
1893
1894                 /* disable all filters */
1895                 for (i = 0; i < WUF_NUM; i++) {
1896                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1897                         if (ret < 0) {
1898                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1899                                 goto done;
1900                         }
1901                 }
1902
1903                 if (pdata->wolopts & WAKE_MCAST) {
1904                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1905                         netdev_info(dev->net, "enabling multicast detection\n");
1906
1907                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1908                                 | smsc_crc(mcast, 3);
1909                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1910                         if (ret < 0) {
1911                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1912                                 goto done;
1913                         }
1914                 }
1915
1916                 if (pdata->wolopts & WAKE_ARP) {
1917                         const u8 arp[] = {0x08, 0x06};
1918                         netdev_info(dev->net, "enabling ARP detection\n");
1919
1920                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1921                                 | smsc_crc(arp, 2);
1922                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1923                         if (ret < 0) {
1924                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1925                                 goto done;
1926                         }
1927                 }
1928
1929                 /* clear any pending pattern match packet status */
1930                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1931                 if (ret < 0) {
1932                         netdev_warn(dev->net, "Error reading WUCSR\n");
1933                         goto done;
1934                 }
1935
1936                 val |= WUCSR_WUFR;
1937
1938                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1939                 if (ret < 0) {
1940                         netdev_warn(dev->net, "Error writing WUCSR\n");
1941                         goto done;
1942                 }
1943
1944                 netdev_info(dev->net, "enabling packet match detection\n");
1945                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1946                 if (ret < 0) {
1947                         netdev_warn(dev->net, "Error reading WUCSR\n");
1948                         goto done;
1949                 }
1950
1951                 val |= WUCSR_WUEN;
1952
1953                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1954                 if (ret < 0) {
1955                         netdev_warn(dev->net, "Error writing WUCSR\n");
1956                         goto done;
1957                 }
1958         } else {
1959                 netdev_info(dev->net, "disabling packet match detection\n");
1960                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1961                 if (ret < 0) {
1962                         netdev_warn(dev->net, "Error reading WUCSR\n");
1963                         goto done;
1964                 }
1965
1966                 val &= ~WUCSR_WUEN;
1967
1968                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1969                 if (ret < 0) {
1970                         netdev_warn(dev->net, "Error writing WUCSR\n");
1971                         goto done;
1972                 }
1973         }
1974
1975         /* disable magic, bcast & unicast wakeup sources */
1976         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1977         if (ret < 0) {
1978                 netdev_warn(dev->net, "Error reading WUCSR\n");
1979                 goto done;
1980         }
1981
1982         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1983
1984         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1985         if (ret < 0) {
1986                 netdev_warn(dev->net, "Error writing WUCSR\n");
1987                 goto done;
1988         }
1989
1990         if (pdata->wolopts & WAKE_PHY) {
1991                 netdev_info(dev->net, "enabling PHY wakeup\n");
1992
1993                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1994                 if (ret < 0) {
1995                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1996                         goto done;
1997                 }
1998
1999                 /* clear wol status, enable energy detection */
2000                 val &= ~PMT_CTL_WUPS;
2001                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2002
2003                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2004                 if (ret < 0) {
2005                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2006                         goto done;
2007                 }
2008         }
2009
2010         if (pdata->wolopts & WAKE_MAGIC) {
2011                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2012                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2013                 if (ret < 0) {
2014                         netdev_warn(dev->net, "Error reading WUCSR\n");
2015                         goto done;
2016                 }
2017
2018                 /* clear any pending magic packet status */
2019                 val |= WUCSR_MPR | WUCSR_MPEN;
2020
2021                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2022                 if (ret < 0) {
2023                         netdev_warn(dev->net, "Error writing WUCSR\n");
2024                         goto done;
2025                 }
2026         }
2027
2028         if (pdata->wolopts & WAKE_BCAST) {
2029                 netdev_info(dev->net, "enabling broadcast detection\n");
2030                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2031                 if (ret < 0) {
2032                         netdev_warn(dev->net, "Error reading WUCSR\n");
2033                         goto done;
2034                 }
2035
2036                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2037
2038                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2039                 if (ret < 0) {
2040                         netdev_warn(dev->net, "Error writing WUCSR\n");
2041                         goto done;
2042                 }
2043         }
2044
2045         if (pdata->wolopts & WAKE_UCAST) {
2046                 netdev_info(dev->net, "enabling unicast detection\n");
2047                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2048                 if (ret < 0) {
2049                         netdev_warn(dev->net, "Error reading WUCSR\n");
2050                         goto done;
2051                 }
2052
2053                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2054
2055                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2056                 if (ret < 0) {
2057                         netdev_warn(dev->net, "Error writing WUCSR\n");
2058                         goto done;
2059                 }
2060         }
2061
2062         /* enable receiver to enable frame reception */
2063         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2064         if (ret < 0) {
2065                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2066                 goto done;
2067         }
2068
2069         val |= MAC_RX_RXEN;
2070
2071         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2072         if (ret < 0) {
2073                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2074                 goto done;
2075         }
2076
2077         /* some wol options are enabled, so enter SUSPEND0 */
2078         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2079         ret = smsc75xx_enter_suspend0(dev);
2080
2081 done:
2082         /*
2083          * TODO: resume() might need to handle the suspend failure
2084          * in system sleep
2085          */
2086         if (ret && PMSG_IS_AUTO(message))
2087                 usbnet_resume(intf);
2088         return ret;
2089 }
2090
2091 static int smsc75xx_resume(struct usb_interface *intf)
2092 {
2093         struct usbnet *dev = usb_get_intfdata(intf);
2094         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2095         u8 suspend_flags = pdata->suspend_flags;
2096         int ret;
2097         u32 val;
2098
2099         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2100
2101         /* do this first to ensure it's cleared even in error case */
2102         pdata->suspend_flags = 0;
2103
2104         if (suspend_flags & SUSPEND_ALLMODES) {
2105                 /* Disable wakeup sources */
2106                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2107                 if (ret < 0) {
2108                         netdev_warn(dev->net, "Error reading WUCSR\n");
2109                         return ret;
2110                 }
2111
2112                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2113                         | WUCSR_BCST_EN);
2114
2115                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2116                 if (ret < 0) {
2117                         netdev_warn(dev->net, "Error writing WUCSR\n");
2118                         return ret;
2119                 }
2120
2121                 /* clear wake-up status */
2122                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2123                 if (ret < 0) {
2124                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2125                         return ret;
2126                 }
2127
2128                 val &= ~PMT_CTL_WOL_EN;
2129                 val |= PMT_CTL_WUPS;
2130
2131                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2132                 if (ret < 0) {
2133                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2134                         return ret;
2135                 }
2136         }
2137
2138         if (suspend_flags & SUSPEND_SUSPEND2) {
2139                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2140
2141                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2142                 if (ret < 0) {
2143                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2144                         return ret;
2145                 }
2146
2147                 val |= PMT_CTL_PHY_PWRUP;
2148
2149                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2150                 if (ret < 0) {
2151                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2152                         return ret;
2153                 }
2154         }
2155
2156         ret = smsc75xx_wait_ready(dev, 1);
2157         if (ret < 0) {
2158                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2159                 return ret;
2160         }
2161
2162         return usbnet_resume(intf);
2163 }
2164
2165 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2166                                      u32 rx_cmd_a, u32 rx_cmd_b)
2167 {
2168         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2169             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2170                 skb->ip_summed = CHECKSUM_NONE;
2171         } else {
2172                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2173                 skb->ip_summed = CHECKSUM_COMPLETE;
2174         }
2175 }
2176
2177 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2178 {
2179         /* This check is no longer done by usbnet */
2180         if (skb->len < dev->net->hard_header_len)
2181                 return 0;
2182
2183         while (skb->len > 0) {
2184                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2185                 struct sk_buff *ax_skb;
2186                 unsigned char *packet;
2187
2188                 rx_cmd_a = get_unaligned_le32(skb->data);
2189                 skb_pull(skb, 4);
2190
2191                 rx_cmd_b = get_unaligned_le32(skb->data);
2192                 skb_pull(skb, 4 + RXW_PADDING);
2193
2194                 packet = skb->data;
2195
2196                 /* get the packet length */
2197                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2198                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2199
2200                 if (unlikely(size > skb->len)) {
2201                         netif_dbg(dev, rx_err, dev->net,
2202                                   "size err rx_cmd_a=0x%08x\n",
2203                                   rx_cmd_a);
2204                         return 0;
2205                 }
2206
2207                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2208                         netif_dbg(dev, rx_err, dev->net,
2209                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2210                         dev->net->stats.rx_errors++;
2211                         dev->net->stats.rx_dropped++;
2212
2213                         if (rx_cmd_a & RX_CMD_A_FCS)
2214                                 dev->net->stats.rx_crc_errors++;
2215                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2216                                 dev->net->stats.rx_frame_errors++;
2217                 } else {
2218                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2219                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2220                                 netif_dbg(dev, rx_err, dev->net,
2221                                           "size err rx_cmd_a=0x%08x\n",
2222                                           rx_cmd_a);
2223                                 return 0;
2224                         }
2225
2226                         /* last frame in this batch */
2227                         if (skb->len == size) {
2228                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2229                                         rx_cmd_b);
2230
2231                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2232
2233                                 return 1;
2234                         }
2235
2236                         /* Use "size - 4" to remove fcs */
2237                         ax_skb = netdev_alloc_skb_ip_align(dev->net, size - 4);
2238                         if (unlikely(!ax_skb)) {
2239                                 netdev_warn(dev->net, "Error allocating skb\n");
2240                                 return 0;
2241                         }
2242
2243                         skb_put(ax_skb, size - 4);
2244                         memcpy(ax_skb->data, packet, size - 4);
2245
2246                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2247                                 rx_cmd_b);
2248
2249                         usbnet_skb_return(dev, ax_skb);
2250                 }
2251
2252                 skb_pull(skb, size);
2253
2254                 /* padding bytes before the next frame starts */
2255                 if (skb->len)
2256                         skb_pull(skb, align_count);
2257         }
2258
2259         return 1;
2260 }
2261
2262 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2263                                          struct sk_buff *skb, gfp_t flags)
2264 {
2265         u32 tx_cmd_a, tx_cmd_b;
2266         void *ptr;
2267
2268         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2269                 dev_kfree_skb_any(skb);
2270                 return NULL;
2271         }
2272
2273         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2274
2275         if (skb->ip_summed == CHECKSUM_PARTIAL)
2276                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2277
2278         if (skb_is_gso(skb)) {
2279                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2280                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2281
2282                 tx_cmd_a |= TX_CMD_A_LSO;
2283         } else {
2284                 tx_cmd_b = 0;
2285         }
2286
2287         ptr = skb_push(skb, 8);
2288         put_unaligned_le32(tx_cmd_a, ptr);
2289         put_unaligned_le32(tx_cmd_b, ptr + 4);
2290
2291         return skb;
2292 }
2293
2294 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2295 {
2296         dev->intf->needs_remote_wakeup = on;
2297         return 0;
2298 }
2299
2300 static const struct driver_info smsc75xx_info = {
2301         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2302         .bind           = smsc75xx_bind,
2303         .unbind         = smsc75xx_unbind,
2304         .link_reset     = smsc75xx_link_reset,
2305         .reset          = smsc75xx_reset,
2306         .rx_fixup       = smsc75xx_rx_fixup,
2307         .tx_fixup       = smsc75xx_tx_fixup,
2308         .status         = smsc75xx_status,
2309         .manage_power   = smsc75xx_manage_power,
2310         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2311 };
2312
2313 static const struct usb_device_id products[] = {
2314         {
2315                 /* SMSC7500 USB Gigabit Ethernet Device */
2316                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2317                 .driver_info = (unsigned long) &smsc75xx_info,
2318         },
2319         {
2320                 /* SMSC7500 USB Gigabit Ethernet Device */
2321                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2322                 .driver_info = (unsigned long) &smsc75xx_info,
2323         },
2324         { },            /* END */
2325 };
2326 MODULE_DEVICE_TABLE(usb, products);
2327
2328 static struct usb_driver smsc75xx_driver = {
2329         .name           = SMSC_CHIPNAME,
2330         .id_table       = products,
2331         .probe          = usbnet_probe,
2332         .suspend        = smsc75xx_suspend,
2333         .resume         = smsc75xx_resume,
2334         .reset_resume   = smsc75xx_resume,
2335         .disconnect     = usbnet_disconnect,
2336         .disable_hub_initiated_lpm = 1,
2337         .supports_autosuspend = 1,
2338 };
2339
2340 module_usb_driver(smsc75xx_driver);
2341
2342 MODULE_AUTHOR("Nancy Lin");
2343 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2344 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2345 MODULE_LICENSE("GPL");