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         memcpy(&intdata, urb->transfer_buffer, 4);
 665         le32_to_cpus(&intdata);
 666
 667         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 668
 669         if (intdata & INT_ENP_PHY_INT)
 670                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 671         else
 672                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 673                             intdata);
 674 }
 675
 676 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 677 {
 678         return MAX_EEPROM_SIZE;
 679 }
 680
 681 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 682                                        struct ethtool_eeprom *ee, u8 *data)
 683 {
 684         struct usbnet *dev = netdev_priv(netdev);
 685
 686         ee->magic = LAN75XX_EEPROM_MAGIC;
 687
 688         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 689 }
 690
 691 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 692                                        struct ethtool_eeprom *ee, u8 *data)
 693 {
 694         struct usbnet *dev = netdev_priv(netdev);
 695
 696         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 697                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 698                             ee->magic);
 699                 return -EINVAL;
 700         }
 701
 702         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 703 }
 704
 705 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 706                                      struct ethtool_wolinfo *wolinfo)
 707 {
 708         struct usbnet *dev = netdev_priv(net);
 709         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 710
 711         wolinfo->supported = SUPPORTED_WAKE;
 712         wolinfo->wolopts = pdata->wolopts;
 713 }
 714
 715 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 716                                     struct ethtool_wolinfo *wolinfo)
 717 {
 718         struct usbnet *dev = netdev_priv(net);
 719         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 720         int ret;
 721
 722         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 723                 return -EINVAL;
 724
 725         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 726
 727         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 728         if (ret < 0)
 729                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 730
 731         return ret;
 732 }
 733
 734 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 735         .get_link       = usbnet_get_link,
 736         .nway_reset     = usbnet_nway_reset,
 737         .get_drvinfo    = usbnet_get_drvinfo,
 738         .get_msglevel   = usbnet_get_msglevel,
 739         .set_msglevel   = usbnet_set_msglevel,
 740         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 741         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 742         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 743         .get_wol        = smsc75xx_ethtool_get_wol,
 744         .set_wol        = smsc75xx_ethtool_set_wol,
 745         .get_link_ksettings     = usbnet_get_link_ksettings,
 746         .set_link_ksettings     = usbnet_set_link_ksettings,
 747 };
 748
 749 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 750 {
 751         struct usbnet *dev = netdev_priv(netdev);
 752
 753         if (!netif_running(netdev))
 754                 return -EINVAL;
 755
 756         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 757 }
 758
 759 static void smsc75xx_init_mac_address(struct usbnet *dev)
 760 {
 761         const u8 *mac_addr;
 762
 763         /* maybe the boot loader passed the MAC address in devicetree */
 764         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 765         if (!IS_ERR(mac_addr)) {
 766                 ether_addr_copy(dev->net->dev_addr, mac_addr);
 767                 return;
 768         }
 769
 770         /* try reading mac address from EEPROM */
 771         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 772                         dev->net->dev_addr) == 0) {
 773                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 774                         /* eeprom values are valid so use them */
 775                         netif_dbg(dev, ifup, dev->net,
 776                                   "MAC address read from EEPROM\n");
 777                         return;
 778                 }
 779         }
 780
 781         /* no useful static MAC address found. generate a random one */
 782         eth_hw_addr_random(dev->net);
 783         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 784 }
 785
 786 static int smsc75xx_set_mac_address(struct usbnet *dev)
 787 {
 788         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 789                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 790         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 791
 792         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 793         if (ret < 0) {
 794                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 795                 return ret;
 796         }
 797
 798         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 799         if (ret < 0) {
 800                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 801                 return ret;
 802         }
 803
 804         addr_hi |= ADDR_FILTX_FB_VALID;
 805         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 806         if (ret < 0) {
 807                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 808                 return ret;
 809         }
 810
 811         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 812         if (ret < 0)
 813                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 814
 815         return ret;
 816 }
 817
 818 static int smsc75xx_phy_initialize(struct usbnet *dev)
 819 {
 820         int bmcr, ret, timeout = 0;
 821
 822         /* Initialize MII structure */
 823         dev->mii.dev = dev->net;
 824         dev->mii.mdio_read = smsc75xx_mdio_read;
 825         dev->mii.mdio_write = smsc75xx_mdio_write;
 826         dev->mii.phy_id_mask = 0x1f;
 827         dev->mii.reg_num_mask = 0x1f;
 828         dev->mii.supports_gmii = 1;
 829         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 830
 831         /* reset phy and wait for reset to complete */
 832         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 833
 834         do {
 835                 msleep(10);
 836                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 837                 if (bmcr < 0) {
 838                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 839                         return bmcr;
 840                 }
 841                 timeout++;
 842         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 843
 844         if (timeout >= 100) {
 845                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 846                 return -EIO;
 847         }
 848
 849         /* phy workaround for gig link */
 850         smsc75xx_phy_gig_workaround(dev);
 851
 852         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 853                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 854                 ADVERTISE_PAUSE_ASYM);
 855         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 856                 ADVERTISE_1000FULL);
 857
 858         /* read and write to clear phy interrupt status */
 859         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 860         if (ret < 0) {
 861                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 862                 return ret;
 863         }
 864
 865         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 866
 867         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 868                 PHY_INT_MASK_DEFAULT);
 869         mii_nway_restart(&dev->mii);
 870
 871         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 872         return 0;
 873 }
 874
 875 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 876 {
 877         int ret = 0;
 878         u32 buf;
 879         bool rxenabled;
 880
 881         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 882         if (ret < 0) {
 883                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 884                 return ret;
 885         }
 886
 887         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 888
 889         if (rxenabled) {
 890                 buf &= ~MAC_RX_RXEN;
 891                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 892                 if (ret < 0) {
 893                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 894                         return ret;
 895                 }
 896         }
 897
 898         /* add 4 to size for FCS */
 899         buf &= ~MAC_RX_MAX_SIZE;
 900         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 901
 902         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 903         if (ret < 0) {
 904                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 905                 return ret;
 906         }
 907
 908         if (rxenabled) {
 909                 buf |= MAC_RX_RXEN;
 910                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 911                 if (ret < 0) {
 912                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 913                         return ret;
 914                 }
 915         }
 916
 917         return 0;
 918 }
 919
 920 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 921 {
 922         struct usbnet *dev = netdev_priv(netdev);
 923         int ret;
 924
 925         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 926         if (ret < 0) {
 927                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 928                 return ret;
 929         }
 930
 931         return usbnet_change_mtu(netdev, new_mtu);
 932 }
 933
 934 /* Enable or disable Rx checksum offload engine */
 935 static int smsc75xx_set_features(struct net_device *netdev,
 936         netdev_features_t features)
 937 {
 938         struct usbnet *dev = netdev_priv(netdev);
 939         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 940         unsigned long flags;
 941         int ret;
 942
 943         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 944
 945         if (features & NETIF_F_RXCSUM)
 946                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 947         else
 948                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 949
 950         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 951         /* it's racing here! */
 952
 953         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 954         if (ret < 0) {
 955                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 956                 return ret;
 957         }
 958         return 0;
 959 }
 960
 961 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 962 {
 963         int timeout = 0;
 964
 965         do {
 966                 u32 buf;
 967                 int ret;
 968
 969                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 970
 971                 if (ret < 0) {
 972                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 973                         return ret;
 974                 }
 975
 976                 if (buf & PMT_CTL_DEV_RDY)
 977                         return 0;
 978
 979                 msleep(10);
 980                 timeout++;
 981         } while (timeout < 100);
 982
 983         netdev_warn(dev->net, "timeout waiting for device ready\n");
 984         return -EIO;
 985 }
 986
 987 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 988 {
 989         struct mii_if_info *mii = &dev->mii;
 990         int ret = 0, timeout = 0;
 991         u32 buf, link_up = 0;
 992
 993         /* Set the phy in Gig loopback */
 994         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 995
 996         /* Wait for the link up */
 997         do {
 998                 link_up = smsc75xx_link_ok_nopm(dev);
 999                 usleep_range(10000, 20000);
1000                 timeout++;
1001         } while ((!link_up) && (timeout < 1000));
1002
1003         if (timeout >= 1000) {
1004                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1005                 return -EIO;
1006         }
1007
1008         /* phy reset */
1009         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1010         if (ret < 0) {
1011                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1012                 return ret;
1013         }
1014
1015         buf |= PMT_CTL_PHY_RST;
1016
1017         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1018         if (ret < 0) {
1019                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1020                 return ret;
1021         }
1022
1023         timeout = 0;
1024         do {
1025                 usleep_range(10000, 20000);
1026                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1027                 if (ret < 0) {
1028                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1029                                     ret);
1030                         return ret;
1031                 }
1032                 timeout++;
1033         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1034
1035         if (timeout >= 100) {
1036                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1037                 return -EIO;
1038         }
1039
1040         return 0;
1041 }
1042
1043 static int smsc75xx_reset(struct usbnet *dev)
1044 {
1045         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1046         u32 buf;
1047         int ret = 0, timeout;
1048
1049         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1050
1051         ret = smsc75xx_wait_ready(dev, 0);
1052         if (ret < 0) {
1053                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1054                 return ret;
1055         }
1056
1057         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1058         if (ret < 0) {
1059                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1060                 return ret;
1061         }
1062
1063         buf |= HW_CFG_LRST;
1064
1065         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1066         if (ret < 0) {
1067                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1068                 return ret;
1069         }
1070
1071         timeout = 0;
1072         do {
1073                 msleep(10);
1074                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1075                 if (ret < 0) {
1076                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1077                         return ret;
1078                 }
1079                 timeout++;
1080         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1081
1082         if (timeout >= 100) {
1083                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1084                 return -EIO;
1085         }
1086
1087         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1088
1089         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1090         if (ret < 0) {
1091                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1092                 return ret;
1093         }
1094
1095         buf |= PMT_CTL_PHY_RST;
1096
1097         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1098         if (ret < 0) {
1099                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1100                 return ret;
1101         }
1102
1103         timeout = 0;
1104         do {
1105                 msleep(10);
1106                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1107                 if (ret < 0) {
1108                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1109                         return ret;
1110                 }
1111                 timeout++;
1112         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1113
1114         if (timeout >= 100) {
1115                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1116                 return -EIO;
1117         }
1118
1119         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1120
1121         ret = smsc75xx_set_mac_address(dev);
1122         if (ret < 0) {
1123                 netdev_warn(dev->net, "Failed to set mac address\n");
1124                 return ret;
1125         }
1126
1127         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1128                   dev->net->dev_addr);
1129
1130         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1131         if (ret < 0) {
1132                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1133                 return ret;
1134         }
1135
1136         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1137                   buf);
1138
1139         buf |= HW_CFG_BIR;
1140
1141         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1142         if (ret < 0) {
1143                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1144                 return ret;
1145         }
1146
1147         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1148         if (ret < 0) {
1149                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1150                 return ret;
1151         }
1152
1153         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1154                   buf);
1155
1156         if (!turbo_mode) {
1157                 buf = 0;
1158                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1159         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1160                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1161                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1162         } else {
1163                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1164                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1165         }
1166
1167         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1168                   (ulong)dev->rx_urb_size);
1169
1170         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1171         if (ret < 0) {
1172                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1173                 return ret;
1174         }
1175
1176         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1177         if (ret < 0) {
1178                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1179                 return ret;
1180         }
1181
1182         netif_dbg(dev, ifup, dev->net,
1183                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1184
1185         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1186         if (ret < 0) {
1187                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1188                 return ret;
1189         }
1190
1191         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1192         if (ret < 0) {
1193                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1194                 return ret;
1195         }
1196
1197         netif_dbg(dev, ifup, dev->net,
1198                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1199
1200         if (turbo_mode) {
1201                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1202                 if (ret < 0) {
1203                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1204                         return ret;
1205                 }
1206
1207                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1208
1209                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1210
1211                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1212                 if (ret < 0) {
1213                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1214                         return ret;
1215                 }
1216
1217                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1218                 if (ret < 0) {
1219                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1220                         return ret;
1221                 }
1222
1223                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1224         }
1225
1226         /* set FIFO sizes */
1227         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1228         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1229         if (ret < 0) {
1230                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1231                 return ret;
1232         }
1233
1234         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1235
1236         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1237         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1238         if (ret < 0) {
1239                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1240                 return ret;
1241         }
1242
1243         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1244
1245         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1246         if (ret < 0) {
1247                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1248                 return ret;
1249         }
1250
1251         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1252         if (ret < 0) {
1253                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1254                 return ret;
1255         }
1256
1257         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1258
1259         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1260         if (ret < 0) {
1261                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1262                 return ret;
1263         }
1264
1265         /* only set default GPIO/LED settings if no EEPROM is detected */
1266         if (!(buf & E2P_CMD_LOADED)) {
1267                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1268                 if (ret < 0) {
1269                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1270                         return ret;
1271                 }
1272
1273                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1274                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1275
1276                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1277                 if (ret < 0) {
1278                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1279                         return ret;
1280                 }
1281         }
1282
1283         ret = smsc75xx_write_reg(dev, FLOW, 0);
1284         if (ret < 0) {
1285                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1286                 return ret;
1287         }
1288
1289         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1290         if (ret < 0) {
1291                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1292                 return ret;
1293         }
1294
1295         /* Don't need rfe_ctl_lock during initialisation */
1296         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1297         if (ret < 0) {
1298                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1299                 return ret;
1300         }
1301
1302         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1303
1304         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1305         if (ret < 0) {
1306                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1307                 return ret;
1308         }
1309
1310         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1311         if (ret < 0) {
1312                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1313                 return ret;
1314         }
1315
1316         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1317                   pdata->rfe_ctl);
1318
1319         /* Enable or disable checksum offload engines */
1320         smsc75xx_set_features(dev->net, dev->net->features);
1321
1322         smsc75xx_set_multicast(dev->net);
1323
1324         ret = smsc75xx_phy_initialize(dev);
1325         if (ret < 0) {
1326                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1327                 return ret;
1328         }
1329
1330         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1331         if (ret < 0) {
1332                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1333                 return ret;
1334         }
1335
1336         /* enable PHY interrupts */
1337         buf |= INT_ENP_PHY_INT;
1338
1339         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1340         if (ret < 0) {
1341                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1342                 return ret;
1343         }
1344
1345         /* allow mac to detect speed and duplex from phy */
1346         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1347         if (ret < 0) {
1348                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1349                 return ret;
1350         }
1351
1352         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1353         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1354         if (ret < 0) {
1355                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1356                 return ret;
1357         }
1358
1359         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1360         if (ret < 0) {
1361                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1362                 return ret;
1363         }
1364
1365         buf |= MAC_TX_TXEN;
1366
1367         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1368         if (ret < 0) {
1369                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1370                 return ret;
1371         }
1372
1373         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1374
1375         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1376         if (ret < 0) {
1377                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1378                 return ret;
1379         }
1380
1381         buf |= FCT_TX_CTL_EN;
1382
1383         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1384         if (ret < 0) {
1385                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1386                 return ret;
1387         }
1388
1389         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1390
1391         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1392         if (ret < 0) {
1393                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1394                 return ret;
1395         }
1396
1397         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1398         if (ret < 0) {
1399                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1400                 return ret;
1401         }
1402
1403         buf |= MAC_RX_RXEN;
1404
1405         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1406         if (ret < 0) {
1407                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1408                 return ret;
1409         }
1410
1411         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1412
1413         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1414         if (ret < 0) {
1415                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1416                 return ret;
1417         }
1418
1419         buf |= FCT_RX_CTL_EN;
1420
1421         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1422         if (ret < 0) {
1423                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1424                 return ret;
1425         }
1426
1427         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1428
1429         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1430         return 0;
1431 }
1432
1433 static const struct net_device_ops smsc75xx_netdev_ops = {
1434         .ndo_open               = usbnet_open,
1435         .ndo_stop               = usbnet_stop,
1436         .ndo_start_xmit         = usbnet_start_xmit,
1437         .ndo_tx_timeout         = usbnet_tx_timeout,
1438         .ndo_get_stats64        = usbnet_get_stats64,
1439         .ndo_change_mtu         = smsc75xx_change_mtu,
1440         .ndo_set_mac_address    = eth_mac_addr,
1441         .ndo_validate_addr      = eth_validate_addr,
1442         .ndo_do_ioctl           = smsc75xx_ioctl,
1443         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1444         .ndo_set_features       = smsc75xx_set_features,
1445 };
1446
1447 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1448 {
1449         struct smsc75xx_priv *pdata = NULL;
1450         int ret;
1451
1452         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1453
1454         ret = usbnet_get_endpoints(dev, intf);
1455         if (ret < 0) {
1456                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1457                 return ret;
1458         }
1459
1460         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1461                                               GFP_KERNEL);
1462
1463         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1464         if (!pdata)
1465                 return -ENOMEM;
1466
1467         pdata->dev = dev;
1468
1469         spin_lock_init(&pdata->rfe_ctl_lock);
1470         mutex_init(&pdata->dataport_mutex);
1471
1472         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1473
1474         if (DEFAULT_TX_CSUM_ENABLE)
1475                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1476
1477         if (DEFAULT_RX_CSUM_ENABLE)
1478                 dev->net->features |= NETIF_F_RXCSUM;
1479
1480         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1481                                 NETIF_F_RXCSUM;
1482
1483         ret = smsc75xx_wait_ready(dev, 0);
1484         if (ret < 0) {
1485                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1486                 return ret;
1487         }
1488
1489         smsc75xx_init_mac_address(dev);
1490
1491         /* Init all registers */
1492         ret = smsc75xx_reset(dev);
1493         if (ret < 0) {
1494                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1495                 return ret;
1496         }
1497
1498         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1499         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1500         dev->net->flags |= IFF_MULTICAST;
1501         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1502         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1503         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1504         return 0;
1505 }
1506
1507 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1508 {
1509         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1510         if (pdata) {
1511                 cancel_work_sync(&pdata->set_multicast);
1512                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1513                 kfree(pdata);
1514                 pdata = NULL;
1515                 dev->data[0] = 0;
1516         }
1517 }
1518
1519 static u16 smsc_crc(const u8 *buffer, size_t len)
1520 {
1521         return bitrev16(crc16(0xFFFF, buffer, len));
1522 }
1523
1524 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1525                                u32 wuf_mask1)
1526 {
1527         int cfg_base = WUF_CFGX + filter * 4;
1528         int mask_base = WUF_MASKX + filter * 16;
1529         int ret;
1530
1531         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1532         if (ret < 0) {
1533                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1534                 return ret;
1535         }
1536
1537         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1538         if (ret < 0) {
1539                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1540                 return ret;
1541         }
1542
1543         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1544         if (ret < 0) {
1545                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1546                 return ret;
1547         }
1548
1549         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1550         if (ret < 0) {
1551                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1552                 return ret;
1553         }
1554
1555         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1556         if (ret < 0) {
1557                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1558                 return ret;
1559         }
1560
1561         return 0;
1562 }
1563
1564 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1565 {
1566         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1567         u32 val;
1568         int ret;
1569
1570         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1571         if (ret < 0) {
1572                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1573                 return ret;
1574         }
1575
1576         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1577         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1578
1579         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1580         if (ret < 0) {
1581                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1582                 return ret;
1583         }
1584
1585         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1586
1587         return 0;
1588 }
1589
1590 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1591 {
1592         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1593         u32 val;
1594         int ret;
1595
1596         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1597         if (ret < 0) {
1598                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1599                 return ret;
1600         }
1601
1602         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1603         val |= PMT_CTL_SUS_MODE_1;
1604
1605         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1606         if (ret < 0) {
1607                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1608                 return ret;
1609         }
1610
1611         /* clear wol status, enable energy detection */
1612         val &= ~PMT_CTL_WUPS;
1613         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1614
1615         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1616         if (ret < 0) {
1617                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1618                 return ret;
1619         }
1620
1621         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1622
1623         return 0;
1624 }
1625
1626 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1627 {
1628         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1629         u32 val;
1630         int ret;
1631
1632         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1633         if (ret < 0) {
1634                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1635                 return ret;
1636         }
1637
1638         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1639         val |= PMT_CTL_SUS_MODE_2;
1640
1641         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1642         if (ret < 0) {
1643                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1644                 return ret;
1645         }
1646
1647         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1648
1649         return 0;
1650 }
1651
1652 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1653 {
1654         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1655         u32 val;
1656         int ret;
1657
1658         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1659         if (ret < 0) {
1660                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1661                 return ret;
1662         }
1663
1664         if (val & FCT_RX_CTL_RXUSED) {
1665                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1666                 return -EBUSY;
1667         }
1668
1669         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1670         if (ret < 0) {
1671                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1672                 return ret;
1673         }
1674
1675         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1676         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1677
1678         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1679         if (ret < 0) {
1680                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1681                 return ret;
1682         }
1683
1684         /* clear wol status */
1685         val &= ~PMT_CTL_WUPS;
1686         val |= PMT_CTL_WUPS_WOL;
1687
1688         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1689         if (ret < 0) {
1690                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1691                 return ret;
1692         }
1693
1694         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1695
1696         return 0;
1697 }
1698
1699 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1700 {
1701         struct mii_if_info *mii = &dev->mii;
1702         int ret;
1703
1704         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1705
1706         /* read to clear */
1707         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1708         if (ret < 0) {
1709                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1710                 return ret;
1711         }
1712
1713         /* enable interrupt source */
1714         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1715         if (ret < 0) {
1716                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1717                 return ret;
1718         }
1719
1720         ret |= mask;
1721
1722         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1723
1724         return 0;
1725 }
1726
1727 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1728 {
1729         struct mii_if_info *mii = &dev->mii;
1730         int ret;
1731
1732         /* first, a dummy read, needed to latch some MII phys */
1733         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1734         if (ret < 0) {
1735                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1736                 return ret;
1737         }
1738
1739         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1740         if (ret < 0) {
1741                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1742                 return ret;
1743         }
1744
1745         return !!(ret & BMSR_LSTATUS);
1746 }
1747
1748 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1749 {
1750         int ret;
1751
1752         if (!netif_running(dev->net)) {
1753                 /* interface is ifconfig down so fully power down hw */
1754                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1755                 return smsc75xx_enter_suspend2(dev);
1756         }
1757
1758         if (!link_up) {
1759                 /* link is down so enter EDPD mode */
1760                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1761
1762                 /* enable PHY wakeup events for if cable is attached */
1763                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1764                         PHY_INT_MASK_ANEG_COMP);
1765                 if (ret < 0) {
1766                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1767                         return ret;
1768                 }
1769
1770                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1771                 return smsc75xx_enter_suspend1(dev);
1772         }
1773
1774         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1775         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1776                 PHY_INT_MASK_LINK_DOWN);
1777         if (ret < 0) {
1778                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1779                 return ret;
1780         }
1781
1782         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1783         return smsc75xx_enter_suspend3(dev);
1784 }
1785
1786 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1787 {
1788         struct usbnet *dev = usb_get_intfdata(intf);
1789         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1790         u32 val, link_up;
1791         int ret;
1792
1793         ret = usbnet_suspend(intf, message);
1794         if (ret < 0) {
1795                 netdev_warn(dev->net, "usbnet_suspend error\n");
1796                 return ret;
1797         }
1798
1799         if (pdata->suspend_flags) {
1800                 netdev_warn(dev->net, "error during last resume\n");
1801                 pdata->suspend_flags = 0;
1802         }
1803
1804         /* determine if link is up using only _nopm functions */
1805         link_up = smsc75xx_link_ok_nopm(dev);
1806
1807         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1808                 ret = smsc75xx_autosuspend(dev, link_up);
1809                 goto done;
1810         }
1811
1812         /* if we get this far we're not autosuspending */
1813         /* if no wol options set, or if link is down and we're not waking on
1814          * PHY activity, enter lowest power SUSPEND2 mode
1815          */
1816         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1817                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1818                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1819
1820                 /* disable energy detect (link up) & wake up events */
1821                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1822                 if (ret < 0) {
1823                         netdev_warn(dev->net, "Error reading WUCSR\n");
1824                         goto done;
1825                 }
1826
1827                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1828
1829                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1830                 if (ret < 0) {
1831                         netdev_warn(dev->net, "Error writing WUCSR\n");
1832                         goto done;
1833                 }
1834
1835                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1836                 if (ret < 0) {
1837                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1838                         goto done;
1839                 }
1840
1841                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1842
1843                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1844                 if (ret < 0) {
1845                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1846                         goto done;
1847                 }
1848
1849                 ret = smsc75xx_enter_suspend2(dev);
1850                 goto done;
1851         }
1852
1853         if (pdata->wolopts & WAKE_PHY) {
1854                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1855                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1856                 if (ret < 0) {
1857                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1858                         goto done;
1859                 }
1860
1861                 /* if link is down then configure EDPD and enter SUSPEND1,
1862                  * otherwise enter SUSPEND0 below
1863                  */
1864                 if (!link_up) {
1865                         struct mii_if_info *mii = &dev->mii;
1866                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1867
1868                         /* enable energy detect power-down mode */
1869                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1870                                 PHY_MODE_CTRL_STS);
1871                         if (ret < 0) {
1872                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1873                                 goto done;
1874                         }
1875
1876                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1877
1878                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1879                                 PHY_MODE_CTRL_STS, ret);
1880
1881                         /* enter SUSPEND1 mode */
1882                         ret = smsc75xx_enter_suspend1(dev);
1883                         goto done;
1884                 }
1885         }
1886
1887         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1888                 int i, filter = 0;
1889
1890                 /* disable all filters */
1891                 for (i = 0; i < WUF_NUM; i++) {
1892                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1893                         if (ret < 0) {
1894                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1895                                 goto done;
1896                         }
1897                 }
1898
1899                 if (pdata->wolopts & WAKE_MCAST) {
1900                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1901                         netdev_info(dev->net, "enabling multicast detection\n");
1902
1903                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1904                                 | smsc_crc(mcast, 3);
1905                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1906                         if (ret < 0) {
1907                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1908                                 goto done;
1909                         }
1910                 }
1911
1912                 if (pdata->wolopts & WAKE_ARP) {
1913                         const u8 arp[] = {0x08, 0x06};
1914                         netdev_info(dev->net, "enabling ARP detection\n");
1915
1916                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1917                                 | smsc_crc(arp, 2);
1918                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1919                         if (ret < 0) {
1920                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1921                                 goto done;
1922                         }
1923                 }
1924
1925                 /* clear any pending pattern match packet status */
1926                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1927                 if (ret < 0) {
1928                         netdev_warn(dev->net, "Error reading WUCSR\n");
1929                         goto done;
1930                 }
1931
1932                 val |= WUCSR_WUFR;
1933
1934                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1935                 if (ret < 0) {
1936                         netdev_warn(dev->net, "Error writing WUCSR\n");
1937                         goto done;
1938                 }
1939
1940                 netdev_info(dev->net, "enabling packet match detection\n");
1941                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1942                 if (ret < 0) {
1943                         netdev_warn(dev->net, "Error reading WUCSR\n");
1944                         goto done;
1945                 }
1946
1947                 val |= WUCSR_WUEN;
1948
1949                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1950                 if (ret < 0) {
1951                         netdev_warn(dev->net, "Error writing WUCSR\n");
1952                         goto done;
1953                 }
1954         } else {
1955                 netdev_info(dev->net, "disabling packet match detection\n");
1956                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1957                 if (ret < 0) {
1958                         netdev_warn(dev->net, "Error reading WUCSR\n");
1959                         goto done;
1960                 }
1961
1962                 val &= ~WUCSR_WUEN;
1963
1964                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1965                 if (ret < 0) {
1966                         netdev_warn(dev->net, "Error writing WUCSR\n");
1967                         goto done;
1968                 }
1969         }
1970
1971         /* disable magic, bcast & unicast wakeup sources */
1972         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1973         if (ret < 0) {
1974                 netdev_warn(dev->net, "Error reading WUCSR\n");
1975                 goto done;
1976         }
1977
1978         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1979
1980         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1981         if (ret < 0) {
1982                 netdev_warn(dev->net, "Error writing WUCSR\n");
1983                 goto done;
1984         }
1985
1986         if (pdata->wolopts & WAKE_PHY) {
1987                 netdev_info(dev->net, "enabling PHY wakeup\n");
1988
1989                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1990                 if (ret < 0) {
1991                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1992                         goto done;
1993                 }
1994
1995                 /* clear wol status, enable energy detection */
1996                 val &= ~PMT_CTL_WUPS;
1997                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1998
1999                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2000                 if (ret < 0) {
2001                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2002                         goto done;
2003                 }
2004         }
2005
2006         if (pdata->wolopts & WAKE_MAGIC) {
2007                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2008                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2009                 if (ret < 0) {
2010                         netdev_warn(dev->net, "Error reading WUCSR\n");
2011                         goto done;
2012                 }
2013
2014                 /* clear any pending magic packet status */
2015                 val |= WUCSR_MPR | WUCSR_MPEN;
2016
2017                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2018                 if (ret < 0) {
2019                         netdev_warn(dev->net, "Error writing WUCSR\n");
2020                         goto done;
2021                 }
2022         }
2023
2024         if (pdata->wolopts & WAKE_BCAST) {
2025                 netdev_info(dev->net, "enabling broadcast detection\n");
2026                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2027                 if (ret < 0) {
2028                         netdev_warn(dev->net, "Error reading WUCSR\n");
2029                         goto done;
2030                 }
2031
2032                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2033
2034                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2035                 if (ret < 0) {
2036                         netdev_warn(dev->net, "Error writing WUCSR\n");
2037                         goto done;
2038                 }
2039         }
2040
2041         if (pdata->wolopts & WAKE_UCAST) {
2042                 netdev_info(dev->net, "enabling unicast detection\n");
2043                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2044                 if (ret < 0) {
2045                         netdev_warn(dev->net, "Error reading WUCSR\n");
2046                         goto done;
2047                 }
2048
2049                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2050
2051                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2052                 if (ret < 0) {
2053                         netdev_warn(dev->net, "Error writing WUCSR\n");
2054                         goto done;
2055                 }
2056         }
2057
2058         /* enable receiver to enable frame reception */
2059         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2060         if (ret < 0) {
2061                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2062                 goto done;
2063         }
2064
2065         val |= MAC_RX_RXEN;
2066
2067         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2068         if (ret < 0) {
2069                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2070                 goto done;
2071         }
2072
2073         /* some wol options are enabled, so enter SUSPEND0 */
2074         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2075         ret = smsc75xx_enter_suspend0(dev);
2076
2077 done:
2078         /*
2079          * TODO: resume() might need to handle the suspend failure
2080          * in system sleep
2081          */
2082         if (ret && PMSG_IS_AUTO(message))
2083                 usbnet_resume(intf);
2084         return ret;
2085 }
2086
2087 static int smsc75xx_resume(struct usb_interface *intf)
2088 {
2089         struct usbnet *dev = usb_get_intfdata(intf);
2090         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2091         u8 suspend_flags = pdata->suspend_flags;
2092         int ret;
2093         u32 val;
2094
2095         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2096
2097         /* do this first to ensure it's cleared even in error case */
2098         pdata->suspend_flags = 0;
2099
2100         if (suspend_flags & SUSPEND_ALLMODES) {
2101                 /* Disable wakeup sources */
2102                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2103                 if (ret < 0) {
2104                         netdev_warn(dev->net, "Error reading WUCSR\n");
2105                         return ret;
2106                 }
2107
2108                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2109                         | WUCSR_BCST_EN);
2110
2111                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2112                 if (ret < 0) {
2113                         netdev_warn(dev->net, "Error writing WUCSR\n");
2114                         return ret;
2115                 }
2116
2117                 /* clear wake-up status */
2118                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2119                 if (ret < 0) {
2120                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2121                         return ret;
2122                 }
2123
2124                 val &= ~PMT_CTL_WOL_EN;
2125                 val |= PMT_CTL_WUPS;
2126
2127                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2128                 if (ret < 0) {
2129                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2130                         return ret;
2131                 }
2132         }
2133
2134         if (suspend_flags & SUSPEND_SUSPEND2) {
2135                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2136
2137                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2138                 if (ret < 0) {
2139                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2140                         return ret;
2141                 }
2142
2143                 val |= PMT_CTL_PHY_PWRUP;
2144
2145                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2146                 if (ret < 0) {
2147                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2148                         return ret;
2149                 }
2150         }
2151
2152         ret = smsc75xx_wait_ready(dev, 1);
2153         if (ret < 0) {
2154                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2155                 return ret;
2156         }
2157
2158         return usbnet_resume(intf);
2159 }
2160
2161 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2162                                      u32 rx_cmd_a, u32 rx_cmd_b)
2163 {
2164         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2165             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2166                 skb->ip_summed = CHECKSUM_NONE;
2167         } else {
2168                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2169                 skb->ip_summed = CHECKSUM_COMPLETE;
2170         }
2171 }
2172
2173 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2174 {
2175         /* This check is no longer done by usbnet */
2176         if (skb->len < dev->net->hard_header_len)
2177                 return 0;
2178
2179         while (skb->len > 0) {
2180                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2181                 struct sk_buff *ax_skb;
2182                 unsigned char *packet;
2183
2184                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2185                 le32_to_cpus(&rx_cmd_a);
2186                 skb_pull(skb, 4);
2187
2188                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2189                 le32_to_cpus(&rx_cmd_b);
2190                 skb_pull(skb, 4 + RXW_PADDING);
2191
2192                 packet = skb->data;
2193
2194                 /* get the packet length */
2195                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2196                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2197
2198                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2199                         netif_dbg(dev, rx_err, dev->net,
2200                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2201                         dev->net->stats.rx_errors++;
2202                         dev->net->stats.rx_dropped++;
2203
2204                         if (rx_cmd_a & RX_CMD_A_FCS)
2205                                 dev->net->stats.rx_crc_errors++;
2206                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2207                                 dev->net->stats.rx_frame_errors++;
2208                 } else {
2209                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2210                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2211                                 netif_dbg(dev, rx_err, dev->net,
2212                                           "size err rx_cmd_a=0x%08x\n",
2213                                           rx_cmd_a);
2214                                 return 0;
2215                         }
2216
2217                         /* last frame in this batch */
2218                         if (skb->len == size) {
2219                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2220                                         rx_cmd_b);
2221
2222                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2223                                 skb->truesize = size + sizeof(struct sk_buff);
2224
2225                                 return 1;
2226                         }
2227
2228                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2229                         if (unlikely(!ax_skb)) {
2230                                 netdev_warn(dev->net, "Error allocating skb\n");
2231                                 return 0;
2232                         }
2233
2234                         ax_skb->len = size;
2235                         ax_skb->data = packet;
2236                         skb_set_tail_pointer(ax_skb, size);
2237
2238                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2239                                 rx_cmd_b);
2240
2241                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2242                         ax_skb->truesize = size + sizeof(struct sk_buff);
2243
2244                         usbnet_skb_return(dev, ax_skb);
2245                 }
2246
2247                 skb_pull(skb, size);
2248
2249                 /* padding bytes before the next frame starts */
2250                 if (skb->len)
2251                         skb_pull(skb, align_count);
2252         }
2253
2254         return 1;
2255 }
2256
2257 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2258                                          struct sk_buff *skb, gfp_t flags)
2259 {
2260         u32 tx_cmd_a, tx_cmd_b;
2261
2262         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2263                 dev_kfree_skb_any(skb);
2264                 return NULL;
2265         }
2266
2267         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2268
2269         if (skb->ip_summed == CHECKSUM_PARTIAL)
2270                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2271
2272         if (skb_is_gso(skb)) {
2273                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2274                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2275
2276                 tx_cmd_a |= TX_CMD_A_LSO;
2277         } else {
2278                 tx_cmd_b = 0;
2279         }
2280
2281         skb_push(skb, 4);
2282         cpu_to_le32s(&tx_cmd_b);
2283         memcpy(skb->data, &tx_cmd_b, 4);
2284
2285         skb_push(skb, 4);
2286         cpu_to_le32s(&tx_cmd_a);
2287         memcpy(skb->data, &tx_cmd_a, 4);
2288
2289         return skb;
2290 }
2291
2292 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2293 {
2294         dev->intf->needs_remote_wakeup = on;
2295         return 0;
2296 }
2297
2298 static const struct driver_info smsc75xx_info = {
2299         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2300         .bind           = smsc75xx_bind,
2301         .unbind         = smsc75xx_unbind,
2302         .link_reset     = smsc75xx_link_reset,
2303         .reset          = smsc75xx_reset,
2304         .rx_fixup       = smsc75xx_rx_fixup,
2305         .tx_fixup       = smsc75xx_tx_fixup,
2306         .status         = smsc75xx_status,
2307         .manage_power   = smsc75xx_manage_power,
2308         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2309 };
2310
2311 static const struct usb_device_id products[] = {
2312         {
2313                 /* SMSC7500 USB Gigabit Ethernet Device */
2314                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2315                 .driver_info = (unsigned long) &smsc75xx_info,
2316         },
2317         {
2318                 /* SMSC7500 USB Gigabit Ethernet Device */
2319                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2320                 .driver_info = (unsigned long) &smsc75xx_info,
2321         },
2322         { },            /* END */
2323 };
2324 MODULE_DEVICE_TABLE(usb, products);
2325
2326 static struct usb_driver smsc75xx_driver = {
2327         .name           = SMSC_CHIPNAME,
2328         .id_table       = products,
2329         .probe          = usbnet_probe,
2330         .suspend        = smsc75xx_suspend,
2331         .resume         = smsc75xx_resume,
2332         .reset_resume   = smsc75xx_resume,
2333         .disconnect     = usbnet_disconnect,
2334         .disable_hub_initiated_lpm = 1,
2335         .supports_autosuspend = 1,
2336 };
2337
2338 module_usb_driver(smsc75xx_driver);
2339
2340 MODULE_AUTHOR("Nancy Lin");
2341 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2342 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2343 MODULE_LICENSE("GPL");