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