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_mii,
 745         .set_link_ksettings     = usbnet_set_link_ksettings_mii,
 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         u8 addr[ETH_ALEN];
 761
 762         /* maybe the boot loader passed the MAC address in devicetree */
 763         if (!platform_get_ethdev_address(&dev->udev->dev, dev->net)) {
 764                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 765                         /* device tree values are valid so use them */
 766                         netif_dbg(dev, ifup, dev->net, "MAC address read from the device tree\n");
 767                         return;
 768                 }
 769         }
 770
 771         /* try reading mac address from EEPROM */
 772         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN, addr) == 0) {
 773                 eth_hw_addr_set(dev->net, addr);
 774                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 775                         /* eeprom values are valid so use them */
 776                         netif_dbg(dev, ifup, dev->net,
 777                                   "MAC address read from EEPROM\n");
 778                         return;
 779                 }
 780         }
 781
 782         /* no useful static MAC address found. generate a random one */
 783         eth_hw_addr_random(dev->net);
 784         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 785 }
 786
 787 static int smsc75xx_set_mac_address(struct usbnet *dev)
 788 {
 789         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 790                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 791         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 792
 793         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 794         if (ret < 0) {
 795                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 796                 return ret;
 797         }
 798
 799         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 800         if (ret < 0) {
 801                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 802                 return ret;
 803         }
 804
 805         addr_hi |= ADDR_FILTX_FB_VALID;
 806         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 807         if (ret < 0) {
 808                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 809                 return ret;
 810         }
 811
 812         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 813         if (ret < 0)
 814                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 815
 816         return ret;
 817 }
 818
 819 static int smsc75xx_phy_initialize(struct usbnet *dev)
 820 {
 821         int bmcr, ret, timeout = 0;
 822
 823         /* Initialize MII structure */
 824         dev->mii.dev = dev->net;
 825         dev->mii.mdio_read = smsc75xx_mdio_read;
 826         dev->mii.mdio_write = smsc75xx_mdio_write;
 827         dev->mii.phy_id_mask = 0x1f;
 828         dev->mii.reg_num_mask = 0x1f;
 829         dev->mii.supports_gmii = 1;
 830         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 831
 832         /* reset phy and wait for reset to complete */
 833         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 834
 835         do {
 836                 msleep(10);
 837                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 838                 if (bmcr < 0) {
 839                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 840                         return bmcr;
 841                 }
 842                 timeout++;
 843         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 844
 845         if (timeout >= 100) {
 846                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 847                 return -EIO;
 848         }
 849
 850         /* phy workaround for gig link */
 851         smsc75xx_phy_gig_workaround(dev);
 852
 853         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 854                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 855                 ADVERTISE_PAUSE_ASYM);
 856         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 857                 ADVERTISE_1000FULL);
 858
 859         /* read and write to clear phy interrupt status */
 860         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 861         if (ret < 0) {
 862                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 863                 return ret;
 864         }
 865
 866         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 867
 868         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 869                 PHY_INT_MASK_DEFAULT);
 870         mii_nway_restart(&dev->mii);
 871
 872         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 873         return 0;
 874 }
 875
 876 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 877 {
 878         int ret = 0;
 879         u32 buf;
 880         bool rxenabled;
 881
 882         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 883         if (ret < 0) {
 884                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 885                 return ret;
 886         }
 887
 888         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 889
 890         if (rxenabled) {
 891                 buf &= ~MAC_RX_RXEN;
 892                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 893                 if (ret < 0) {
 894                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 895                         return ret;
 896                 }
 897         }
 898
 899         /* add 4 to size for FCS */
 900         buf &= ~MAC_RX_MAX_SIZE;
 901         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 902
 903         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 904         if (ret < 0) {
 905                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 906                 return ret;
 907         }
 908
 909         if (rxenabled) {
 910                 buf |= MAC_RX_RXEN;
 911                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 912                 if (ret < 0) {
 913                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 914                         return ret;
 915                 }
 916         }
 917
 918         return 0;
 919 }
 920
 921 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 922 {
 923         struct usbnet *dev = netdev_priv(netdev);
 924         int ret;
 925
 926         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 927         if (ret < 0) {
 928                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 929                 return ret;
 930         }
 931
 932         return usbnet_change_mtu(netdev, new_mtu);
 933 }
 934
 935 /* Enable or disable Rx checksum offload engine */
 936 static int smsc75xx_set_features(struct net_device *netdev,
 937         netdev_features_t features)
 938 {
 939         struct usbnet *dev = netdev_priv(netdev);
 940         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 941         unsigned long flags;
 942         int ret;
 943
 944         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 945
 946         if (features & NETIF_F_RXCSUM)
 947                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 948         else
 949                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 950
 951         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 952         /* it's racing here! */
 953
 954         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 955         if (ret < 0) {
 956                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 957                 return ret;
 958         }
 959         return 0;
 960 }
 961
 962 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 963 {
 964         int timeout = 0;
 965
 966         do {
 967                 u32 buf;
 968                 int ret;
 969
 970                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 971
 972                 if (ret < 0) {
 973                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 974                         return ret;
 975                 }
 976
 977                 if (buf & PMT_CTL_DEV_RDY)
 978                         return 0;
 979
 980                 msleep(10);
 981                 timeout++;
 982         } while (timeout < 100);
 983
 984         netdev_warn(dev->net, "timeout waiting for device ready\n");
 985         return -EIO;
 986 }
 987
 988 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
 989 {
 990         struct mii_if_info *mii = &dev->mii;
 991         int ret = 0, timeout = 0;
 992         u32 buf, link_up = 0;
 993
 994         /* Set the phy in Gig loopback */
 995         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
 996
 997         /* Wait for the link up */
 998         do {
 999                 link_up = smsc75xx_link_ok_nopm(dev);
1000                 usleep_range(10000, 20000);
1001                 timeout++;
1002         } while ((!link_up) && (timeout < 1000));
1003
1004         if (timeout >= 1000) {
1005                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1006                 return -EIO;
1007         }
1008
1009         /* phy reset */
1010         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1011         if (ret < 0) {
1012                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1013                 return ret;
1014         }
1015
1016         buf |= PMT_CTL_PHY_RST;
1017
1018         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1019         if (ret < 0) {
1020                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1021                 return ret;
1022         }
1023
1024         timeout = 0;
1025         do {
1026                 usleep_range(10000, 20000);
1027                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1028                 if (ret < 0) {
1029                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1030                                     ret);
1031                         return ret;
1032                 }
1033                 timeout++;
1034         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1035
1036         if (timeout >= 100) {
1037                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1038                 return -EIO;
1039         }
1040
1041         return 0;
1042 }
1043
1044 static int smsc75xx_reset(struct usbnet *dev)
1045 {
1046         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1047         u32 buf;
1048         int ret = 0, timeout;
1049
1050         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1051
1052         ret = smsc75xx_wait_ready(dev, 0);
1053         if (ret < 0) {
1054                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1055                 return ret;
1056         }
1057
1058         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1059         if (ret < 0) {
1060                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1061                 return ret;
1062         }
1063
1064         buf |= HW_CFG_LRST;
1065
1066         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1067         if (ret < 0) {
1068                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1069                 return ret;
1070         }
1071
1072         timeout = 0;
1073         do {
1074                 msleep(10);
1075                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1076                 if (ret < 0) {
1077                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1078                         return ret;
1079                 }
1080                 timeout++;
1081         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1082
1083         if (timeout >= 100) {
1084                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1085                 return -EIO;
1086         }
1087
1088         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1089
1090         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1091         if (ret < 0) {
1092                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1093                 return ret;
1094         }
1095
1096         buf |= PMT_CTL_PHY_RST;
1097
1098         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1099         if (ret < 0) {
1100                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1101                 return ret;
1102         }
1103
1104         timeout = 0;
1105         do {
1106                 msleep(10);
1107                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1108                 if (ret < 0) {
1109                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1110                         return ret;
1111                 }
1112                 timeout++;
1113         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1114
1115         if (timeout >= 100) {
1116                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1117                 return -EIO;
1118         }
1119
1120         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1121
1122         ret = smsc75xx_set_mac_address(dev);
1123         if (ret < 0) {
1124                 netdev_warn(dev->net, "Failed to set mac address\n");
1125                 return ret;
1126         }
1127
1128         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1129                   dev->net->dev_addr);
1130
1131         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1132         if (ret < 0) {
1133                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1134                 return ret;
1135         }
1136
1137         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1138                   buf);
1139
1140         buf |= HW_CFG_BIR;
1141
1142         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1143         if (ret < 0) {
1144                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1145                 return ret;
1146         }
1147
1148         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1149         if (ret < 0) {
1150                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1151                 return ret;
1152         }
1153
1154         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1155                   buf);
1156
1157         if (!turbo_mode) {
1158                 buf = 0;
1159                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1160         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1161                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1162                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1163         } else {
1164                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1165                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1166         }
1167
1168         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1169                   (ulong)dev->rx_urb_size);
1170
1171         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1172         if (ret < 0) {
1173                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1174                 return ret;
1175         }
1176
1177         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1178         if (ret < 0) {
1179                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1180                 return ret;
1181         }
1182
1183         netif_dbg(dev, ifup, dev->net,
1184                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1185
1186         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1187         if (ret < 0) {
1188                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1189                 return ret;
1190         }
1191
1192         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1193         if (ret < 0) {
1194                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1195                 return ret;
1196         }
1197
1198         netif_dbg(dev, ifup, dev->net,
1199                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1200
1201         if (turbo_mode) {
1202                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1203                 if (ret < 0) {
1204                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1205                         return ret;
1206                 }
1207
1208                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1209
1210                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1211
1212                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1213                 if (ret < 0) {
1214                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1215                         return ret;
1216                 }
1217
1218                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1219                 if (ret < 0) {
1220                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1221                         return ret;
1222                 }
1223
1224                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1225         }
1226
1227         /* set FIFO sizes */
1228         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1229         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1230         if (ret < 0) {
1231                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1232                 return ret;
1233         }
1234
1235         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1236
1237         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1238         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1239         if (ret < 0) {
1240                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1241                 return ret;
1242         }
1243
1244         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1245
1246         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1247         if (ret < 0) {
1248                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1249                 return ret;
1250         }
1251
1252         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1253         if (ret < 0) {
1254                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1255                 return ret;
1256         }
1257
1258         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1259
1260         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1261         if (ret < 0) {
1262                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1263                 return ret;
1264         }
1265
1266         /* only set default GPIO/LED settings if no EEPROM is detected */
1267         if (!(buf & E2P_CMD_LOADED)) {
1268                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1269                 if (ret < 0) {
1270                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1271                         return ret;
1272                 }
1273
1274                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1275                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1276
1277                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1278                 if (ret < 0) {
1279                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1280                         return ret;
1281                 }
1282         }
1283
1284         ret = smsc75xx_write_reg(dev, FLOW, 0);
1285         if (ret < 0) {
1286                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1287                 return ret;
1288         }
1289
1290         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1291         if (ret < 0) {
1292                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1293                 return ret;
1294         }
1295
1296         /* Don't need rfe_ctl_lock during initialisation */
1297         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1298         if (ret < 0) {
1299                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1300                 return ret;
1301         }
1302
1303         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1304
1305         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1306         if (ret < 0) {
1307                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1308                 return ret;
1309         }
1310
1311         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1312         if (ret < 0) {
1313                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1314                 return ret;
1315         }
1316
1317         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1318                   pdata->rfe_ctl);
1319
1320         /* Enable or disable checksum offload engines */
1321         smsc75xx_set_features(dev->net, dev->net->features);
1322
1323         smsc75xx_set_multicast(dev->net);
1324
1325         ret = smsc75xx_phy_initialize(dev);
1326         if (ret < 0) {
1327                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1328                 return ret;
1329         }
1330
1331         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1332         if (ret < 0) {
1333                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1334                 return ret;
1335         }
1336
1337         /* enable PHY interrupts */
1338         buf |= INT_ENP_PHY_INT;
1339
1340         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1341         if (ret < 0) {
1342                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1343                 return ret;
1344         }
1345
1346         /* allow mac to detect speed and duplex from phy */
1347         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1348         if (ret < 0) {
1349                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1350                 return ret;
1351         }
1352
1353         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1354         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1355         if (ret < 0) {
1356                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1357                 return ret;
1358         }
1359
1360         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1361         if (ret < 0) {
1362                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1363                 return ret;
1364         }
1365
1366         buf |= MAC_TX_TXEN;
1367
1368         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1369         if (ret < 0) {
1370                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1371                 return ret;
1372         }
1373
1374         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1375
1376         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1377         if (ret < 0) {
1378                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1379                 return ret;
1380         }
1381
1382         buf |= FCT_TX_CTL_EN;
1383
1384         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1385         if (ret < 0) {
1386                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1387                 return ret;
1388         }
1389
1390         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1391
1392         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1393         if (ret < 0) {
1394                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1395                 return ret;
1396         }
1397
1398         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1399         if (ret < 0) {
1400                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1401                 return ret;
1402         }
1403
1404         buf |= MAC_RX_RXEN;
1405
1406         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1407         if (ret < 0) {
1408                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1409                 return ret;
1410         }
1411
1412         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1413
1414         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1415         if (ret < 0) {
1416                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1417                 return ret;
1418         }
1419
1420         buf |= FCT_RX_CTL_EN;
1421
1422         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1423         if (ret < 0) {
1424                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1425                 return ret;
1426         }
1427
1428         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1429
1430         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1431         return 0;
1432 }
1433
1434 static const struct net_device_ops smsc75xx_netdev_ops = {
1435         .ndo_open               = usbnet_open,
1436         .ndo_stop               = usbnet_stop,
1437         .ndo_start_xmit         = usbnet_start_xmit,
1438         .ndo_tx_timeout         = usbnet_tx_timeout,
1439         .ndo_get_stats64        = dev_get_tstats64,
1440         .ndo_change_mtu         = smsc75xx_change_mtu,
1441         .ndo_set_mac_address    = eth_mac_addr,
1442         .ndo_validate_addr      = eth_validate_addr,
1443         .ndo_eth_ioctl          = smsc75xx_ioctl,
1444         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1445         .ndo_set_features       = smsc75xx_set_features,
1446 };
1447
1448 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1449 {
1450         struct smsc75xx_priv *pdata = NULL;
1451         int ret;
1452
1453         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1454
1455         ret = usbnet_get_endpoints(dev, intf);
1456         if (ret < 0) {
1457                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1458                 return ret;
1459         }
1460
1461         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1462                                               GFP_KERNEL);
1463
1464         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1465         if (!pdata)
1466                 return -ENOMEM;
1467
1468         pdata->dev = dev;
1469
1470         spin_lock_init(&pdata->rfe_ctl_lock);
1471         mutex_init(&pdata->dataport_mutex);
1472
1473         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1474
1475         if (DEFAULT_TX_CSUM_ENABLE)
1476                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1477
1478         if (DEFAULT_RX_CSUM_ENABLE)
1479                 dev->net->features |= NETIF_F_RXCSUM;
1480
1481         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1482                                 NETIF_F_RXCSUM;
1483
1484         ret = smsc75xx_wait_ready(dev, 0);
1485         if (ret < 0) {
1486                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1487                 goto free_pdata;
1488         }
1489
1490         smsc75xx_init_mac_address(dev);
1491
1492         /* Init all registers */
1493         ret = smsc75xx_reset(dev);
1494         if (ret < 0) {
1495                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1496                 goto cancel_work;
1497         }
1498
1499         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1500         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1501         dev->net->flags |= IFF_MULTICAST;
1502         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1503         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1504         dev->net->max_mtu = MAX_SINGLE_PACKET_SIZE;
1505         return 0;
1506
1507 cancel_work:
1508         cancel_work_sync(&pdata->set_multicast);
1509 free_pdata:
1510         kfree(pdata);
1511         dev->data[0] = 0;
1512         return ret;
1513 }
1514
1515 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1516 {
1517         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1518         if (pdata) {
1519                 cancel_work_sync(&pdata->set_multicast);
1520                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1521                 kfree(pdata);
1522                 dev->data[0] = 0;
1523         }
1524 }
1525
1526 static u16 smsc_crc(const u8 *buffer, size_t len)
1527 {
1528         return bitrev16(crc16(0xFFFF, buffer, len));
1529 }
1530
1531 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1532                                u32 wuf_mask1)
1533 {
1534         int cfg_base = WUF_CFGX + filter * 4;
1535         int mask_base = WUF_MASKX + filter * 16;
1536         int ret;
1537
1538         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1539         if (ret < 0) {
1540                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1541                 return ret;
1542         }
1543
1544         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1545         if (ret < 0) {
1546                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1547                 return ret;
1548         }
1549
1550         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1551         if (ret < 0) {
1552                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1553                 return ret;
1554         }
1555
1556         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1557         if (ret < 0) {
1558                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1559                 return ret;
1560         }
1561
1562         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1563         if (ret < 0) {
1564                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1565                 return ret;
1566         }
1567
1568         return 0;
1569 }
1570
1571 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1572 {
1573         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1574         u32 val;
1575         int ret;
1576
1577         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1578         if (ret < 0) {
1579                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1580                 return ret;
1581         }
1582
1583         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1584         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1585
1586         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1587         if (ret < 0) {
1588                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1589                 return ret;
1590         }
1591
1592         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1593
1594         return 0;
1595 }
1596
1597 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1598 {
1599         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1600         u32 val;
1601         int ret;
1602
1603         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1604         if (ret < 0) {
1605                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1606                 return ret;
1607         }
1608
1609         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1610         val |= PMT_CTL_SUS_MODE_1;
1611
1612         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1613         if (ret < 0) {
1614                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1615                 return ret;
1616         }
1617
1618         /* clear wol status, enable energy detection */
1619         val &= ~PMT_CTL_WUPS;
1620         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1621
1622         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1623         if (ret < 0) {
1624                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1625                 return ret;
1626         }
1627
1628         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1629
1630         return 0;
1631 }
1632
1633 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1634 {
1635         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1636         u32 val;
1637         int ret;
1638
1639         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1640         if (ret < 0) {
1641                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1642                 return ret;
1643         }
1644
1645         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1646         val |= PMT_CTL_SUS_MODE_2;
1647
1648         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1649         if (ret < 0) {
1650                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1651                 return ret;
1652         }
1653
1654         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1655
1656         return 0;
1657 }
1658
1659 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1660 {
1661         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1662         u32 val;
1663         int ret;
1664
1665         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1666         if (ret < 0) {
1667                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1668                 return ret;
1669         }
1670
1671         if (val & FCT_RX_CTL_RXUSED) {
1672                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1673                 return -EBUSY;
1674         }
1675
1676         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1677         if (ret < 0) {
1678                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1679                 return ret;
1680         }
1681
1682         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1683         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1684
1685         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1686         if (ret < 0) {
1687                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1688                 return ret;
1689         }
1690
1691         /* clear wol status */
1692         val &= ~PMT_CTL_WUPS;
1693         val |= PMT_CTL_WUPS_WOL;
1694
1695         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1696         if (ret < 0) {
1697                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1698                 return ret;
1699         }
1700
1701         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1702
1703         return 0;
1704 }
1705
1706 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1707 {
1708         struct mii_if_info *mii = &dev->mii;
1709         int ret;
1710
1711         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1712
1713         /* read to clear */
1714         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1715         if (ret < 0) {
1716                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1717                 return ret;
1718         }
1719
1720         /* enable interrupt source */
1721         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1722         if (ret < 0) {
1723                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1724                 return ret;
1725         }
1726
1727         ret |= mask;
1728
1729         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1730
1731         return 0;
1732 }
1733
1734 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1735 {
1736         struct mii_if_info *mii = &dev->mii;
1737         int ret;
1738
1739         /* first, a dummy read, needed to latch some MII phys */
1740         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1741         if (ret < 0) {
1742                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1743                 return ret;
1744         }
1745
1746         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1747         if (ret < 0) {
1748                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1749                 return ret;
1750         }
1751
1752         return !!(ret & BMSR_LSTATUS);
1753 }
1754
1755 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1756 {
1757         int ret;
1758
1759         if (!netif_running(dev->net)) {
1760                 /* interface is ifconfig down so fully power down hw */
1761                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1762                 return smsc75xx_enter_suspend2(dev);
1763         }
1764
1765         if (!link_up) {
1766                 /* link is down so enter EDPD mode */
1767                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1768
1769                 /* enable PHY wakeup events for if cable is attached */
1770                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1771                         PHY_INT_MASK_ANEG_COMP);
1772                 if (ret < 0) {
1773                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1774                         return ret;
1775                 }
1776
1777                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1778                 return smsc75xx_enter_suspend1(dev);
1779         }
1780
1781         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1782         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1783                 PHY_INT_MASK_LINK_DOWN);
1784         if (ret < 0) {
1785                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1786                 return ret;
1787         }
1788
1789         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1790         return smsc75xx_enter_suspend3(dev);
1791 }
1792
1793 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1794 {
1795         struct usbnet *dev = usb_get_intfdata(intf);
1796         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1797         u32 val, link_up;
1798         int ret;
1799
1800         ret = usbnet_suspend(intf, message);
1801         if (ret < 0) {
1802                 netdev_warn(dev->net, "usbnet_suspend error\n");
1803                 return ret;
1804         }
1805
1806         if (pdata->suspend_flags) {
1807                 netdev_warn(dev->net, "error during last resume\n");
1808                 pdata->suspend_flags = 0;
1809         }
1810
1811         /* determine if link is up using only _nopm functions */
1812         link_up = smsc75xx_link_ok_nopm(dev);
1813
1814         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1815                 ret = smsc75xx_autosuspend(dev, link_up);
1816                 goto done;
1817         }
1818
1819         /* if we get this far we're not autosuspending */
1820         /* if no wol options set, or if link is down and we're not waking on
1821          * PHY activity, enter lowest power SUSPEND2 mode
1822          */
1823         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1824                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1825                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1826
1827                 /* disable energy detect (link up) & wake up events */
1828                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1829                 if (ret < 0) {
1830                         netdev_warn(dev->net, "Error reading WUCSR\n");
1831                         goto done;
1832                 }
1833
1834                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1835
1836                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1837                 if (ret < 0) {
1838                         netdev_warn(dev->net, "Error writing WUCSR\n");
1839                         goto done;
1840                 }
1841
1842                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1843                 if (ret < 0) {
1844                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1845                         goto done;
1846                 }
1847
1848                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1849
1850                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1851                 if (ret < 0) {
1852                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1853                         goto done;
1854                 }
1855
1856                 ret = smsc75xx_enter_suspend2(dev);
1857                 goto done;
1858         }
1859
1860         if (pdata->wolopts & WAKE_PHY) {
1861                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1862                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1863                 if (ret < 0) {
1864                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1865                         goto done;
1866                 }
1867
1868                 /* if link is down then configure EDPD and enter SUSPEND1,
1869                  * otherwise enter SUSPEND0 below
1870                  */
1871                 if (!link_up) {
1872                         struct mii_if_info *mii = &dev->mii;
1873                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1874
1875                         /* enable energy detect power-down mode */
1876                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1877                                 PHY_MODE_CTRL_STS);
1878                         if (ret < 0) {
1879                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1880                                 goto done;
1881                         }
1882
1883                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1884
1885                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1886                                 PHY_MODE_CTRL_STS, ret);
1887
1888                         /* enter SUSPEND1 mode */
1889                         ret = smsc75xx_enter_suspend1(dev);
1890                         goto done;
1891                 }
1892         }
1893
1894         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1895                 int i, filter = 0;
1896
1897                 /* disable all filters */
1898                 for (i = 0; i < WUF_NUM; i++) {
1899                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1900                         if (ret < 0) {
1901                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1902                                 goto done;
1903                         }
1904                 }
1905
1906                 if (pdata->wolopts & WAKE_MCAST) {
1907                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1908                         netdev_info(dev->net, "enabling multicast detection\n");
1909
1910                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1911                                 | smsc_crc(mcast, 3);
1912                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1913                         if (ret < 0) {
1914                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1915                                 goto done;
1916                         }
1917                 }
1918
1919                 if (pdata->wolopts & WAKE_ARP) {
1920                         const u8 arp[] = {0x08, 0x06};
1921                         netdev_info(dev->net, "enabling ARP detection\n");
1922
1923                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1924                                 | smsc_crc(arp, 2);
1925                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1926                         if (ret < 0) {
1927                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1928                                 goto done;
1929                         }
1930                 }
1931
1932                 /* clear any pending pattern match packet status */
1933                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1934                 if (ret < 0) {
1935                         netdev_warn(dev->net, "Error reading WUCSR\n");
1936                         goto done;
1937                 }
1938
1939                 val |= WUCSR_WUFR;
1940
1941                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1942                 if (ret < 0) {
1943                         netdev_warn(dev->net, "Error writing WUCSR\n");
1944                         goto done;
1945                 }
1946
1947                 netdev_info(dev->net, "enabling packet match detection\n");
1948                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1949                 if (ret < 0) {
1950                         netdev_warn(dev->net, "Error reading WUCSR\n");
1951                         goto done;
1952                 }
1953
1954                 val |= WUCSR_WUEN;
1955
1956                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1957                 if (ret < 0) {
1958                         netdev_warn(dev->net, "Error writing WUCSR\n");
1959                         goto done;
1960                 }
1961         } else {
1962                 netdev_info(dev->net, "disabling packet match detection\n");
1963                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1964                 if (ret < 0) {
1965                         netdev_warn(dev->net, "Error reading WUCSR\n");
1966                         goto done;
1967                 }
1968
1969                 val &= ~WUCSR_WUEN;
1970
1971                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1972                 if (ret < 0) {
1973                         netdev_warn(dev->net, "Error writing WUCSR\n");
1974                         goto done;
1975                 }
1976         }
1977
1978         /* disable magic, bcast & unicast wakeup sources */
1979         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1980         if (ret < 0) {
1981                 netdev_warn(dev->net, "Error reading WUCSR\n");
1982                 goto done;
1983         }
1984
1985         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1986
1987         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1988         if (ret < 0) {
1989                 netdev_warn(dev->net, "Error writing WUCSR\n");
1990                 goto done;
1991         }
1992
1993         if (pdata->wolopts & WAKE_PHY) {
1994                 netdev_info(dev->net, "enabling PHY wakeup\n");
1995
1996                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1997                 if (ret < 0) {
1998                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1999                         goto done;
2000                 }
2001
2002                 /* clear wol status, enable energy detection */
2003                 val &= ~PMT_CTL_WUPS;
2004                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2005
2006                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2007                 if (ret < 0) {
2008                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2009                         goto done;
2010                 }
2011         }
2012
2013         if (pdata->wolopts & WAKE_MAGIC) {
2014                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2015                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2016                 if (ret < 0) {
2017                         netdev_warn(dev->net, "Error reading WUCSR\n");
2018                         goto done;
2019                 }
2020
2021                 /* clear any pending magic packet status */
2022                 val |= WUCSR_MPR | WUCSR_MPEN;
2023
2024                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2025                 if (ret < 0) {
2026                         netdev_warn(dev->net, "Error writing WUCSR\n");
2027                         goto done;
2028                 }
2029         }
2030
2031         if (pdata->wolopts & WAKE_BCAST) {
2032                 netdev_info(dev->net, "enabling broadcast detection\n");
2033                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2034                 if (ret < 0) {
2035                         netdev_warn(dev->net, "Error reading WUCSR\n");
2036                         goto done;
2037                 }
2038
2039                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2040
2041                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2042                 if (ret < 0) {
2043                         netdev_warn(dev->net, "Error writing WUCSR\n");
2044                         goto done;
2045                 }
2046         }
2047
2048         if (pdata->wolopts & WAKE_UCAST) {
2049                 netdev_info(dev->net, "enabling unicast detection\n");
2050                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2051                 if (ret < 0) {
2052                         netdev_warn(dev->net, "Error reading WUCSR\n");
2053                         goto done;
2054                 }
2055
2056                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2057
2058                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2059                 if (ret < 0) {
2060                         netdev_warn(dev->net, "Error writing WUCSR\n");
2061                         goto done;
2062                 }
2063         }
2064
2065         /* enable receiver to enable frame reception */
2066         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2067         if (ret < 0) {
2068                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2069                 goto done;
2070         }
2071
2072         val |= MAC_RX_RXEN;
2073
2074         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2075         if (ret < 0) {
2076                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2077                 goto done;
2078         }
2079
2080         /* some wol options are enabled, so enter SUSPEND0 */
2081         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2082         ret = smsc75xx_enter_suspend0(dev);
2083
2084 done:
2085         /*
2086          * TODO: resume() might need to handle the suspend failure
2087          * in system sleep
2088          */
2089         if (ret && PMSG_IS_AUTO(message))
2090                 usbnet_resume(intf);
2091         return ret;
2092 }
2093
2094 static int smsc75xx_resume(struct usb_interface *intf)
2095 {
2096         struct usbnet *dev = usb_get_intfdata(intf);
2097         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2098         u8 suspend_flags = pdata->suspend_flags;
2099         int ret;
2100         u32 val;
2101
2102         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2103
2104         /* do this first to ensure it's cleared even in error case */
2105         pdata->suspend_flags = 0;
2106
2107         if (suspend_flags & SUSPEND_ALLMODES) {
2108                 /* Disable wakeup sources */
2109                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2110                 if (ret < 0) {
2111                         netdev_warn(dev->net, "Error reading WUCSR\n");
2112                         return ret;
2113                 }
2114
2115                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2116                         | WUCSR_BCST_EN);
2117
2118                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2119                 if (ret < 0) {
2120                         netdev_warn(dev->net, "Error writing WUCSR\n");
2121                         return ret;
2122                 }
2123
2124                 /* clear wake-up status */
2125                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2126                 if (ret < 0) {
2127                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2128                         return ret;
2129                 }
2130
2131                 val &= ~PMT_CTL_WOL_EN;
2132                 val |= PMT_CTL_WUPS;
2133
2134                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2135                 if (ret < 0) {
2136                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2137                         return ret;
2138                 }
2139         }
2140
2141         if (suspend_flags & SUSPEND_SUSPEND2) {
2142                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2143
2144                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2145                 if (ret < 0) {
2146                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2147                         return ret;
2148                 }
2149
2150                 val |= PMT_CTL_PHY_PWRUP;
2151
2152                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2153                 if (ret < 0) {
2154                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2155                         return ret;
2156                 }
2157         }
2158
2159         ret = smsc75xx_wait_ready(dev, 1);
2160         if (ret < 0) {
2161                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2162                 return ret;
2163         }
2164
2165         return usbnet_resume(intf);
2166 }
2167
2168 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2169                                      u32 rx_cmd_a, u32 rx_cmd_b)
2170 {
2171         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2172             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2173                 skb->ip_summed = CHECKSUM_NONE;
2174         } else {
2175                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2176                 skb->ip_summed = CHECKSUM_COMPLETE;
2177         }
2178 }
2179
2180 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2181 {
2182         /* This check is no longer done by usbnet */
2183         if (skb->len < dev->net->hard_header_len)
2184                 return 0;
2185
2186         while (skb->len > 0) {
2187                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2188                 struct sk_buff *ax_skb;
2189                 unsigned char *packet;
2190
2191                 rx_cmd_a = get_unaligned_le32(skb->data);
2192                 skb_pull(skb, 4);
2193
2194                 rx_cmd_b = get_unaligned_le32(skb->data);
2195                 skb_pull(skb, 4 + RXW_PADDING);
2196
2197                 packet = skb->data;
2198
2199                 /* get the packet length */
2200                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2201                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2202
2203                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2204                         netif_dbg(dev, rx_err, dev->net,
2205                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2206                         dev->net->stats.rx_errors++;
2207                         dev->net->stats.rx_dropped++;
2208
2209                         if (rx_cmd_a & RX_CMD_A_FCS)
2210                                 dev->net->stats.rx_crc_errors++;
2211                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2212                                 dev->net->stats.rx_frame_errors++;
2213                 } else {
2214                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2215                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2216                                 netif_dbg(dev, rx_err, dev->net,
2217                                           "size err rx_cmd_a=0x%08x\n",
2218                                           rx_cmd_a);
2219                                 return 0;
2220                         }
2221
2222                         /* last frame in this batch */
2223                         if (skb->len == size) {
2224                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2225                                         rx_cmd_b);
2226
2227                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2228                                 skb->truesize = size + sizeof(struct sk_buff);
2229
2230                                 return 1;
2231                         }
2232
2233                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2234                         if (unlikely(!ax_skb)) {
2235                                 netdev_warn(dev->net, "Error allocating skb\n");
2236                                 return 0;
2237                         }
2238
2239                         ax_skb->len = size;
2240                         ax_skb->data = packet;
2241                         skb_set_tail_pointer(ax_skb, size);
2242
2243                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2244                                 rx_cmd_b);
2245
2246                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2247                         ax_skb->truesize = size + sizeof(struct sk_buff);
2248
2249                         usbnet_skb_return(dev, ax_skb);
2250                 }
2251
2252                 skb_pull(skb, size);
2253
2254                 /* padding bytes before the next frame starts */
2255                 if (skb->len)
2256                         skb_pull(skb, align_count);
2257         }
2258
2259         return 1;
2260 }
2261
2262 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2263                                          struct sk_buff *skb, gfp_t flags)
2264 {
2265         u32 tx_cmd_a, tx_cmd_b;
2266         void *ptr;
2267
2268         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2269                 dev_kfree_skb_any(skb);
2270                 return NULL;
2271         }
2272
2273         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2274
2275         if (skb->ip_summed == CHECKSUM_PARTIAL)
2276                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2277
2278         if (skb_is_gso(skb)) {
2279                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2280                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2281
2282                 tx_cmd_a |= TX_CMD_A_LSO;
2283         } else {
2284                 tx_cmd_b = 0;
2285         }
2286
2287         ptr = skb_push(skb, 8);
2288         put_unaligned_le32(tx_cmd_a, ptr);
2289         put_unaligned_le32(tx_cmd_b, ptr + 4);
2290
2291         return skb;
2292 }
2293
2294 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2295 {
2296         dev->intf->needs_remote_wakeup = on;
2297         return 0;
2298 }
2299
2300 static const struct driver_info smsc75xx_info = {
2301         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2302         .bind           = smsc75xx_bind,
2303         .unbind         = smsc75xx_unbind,
2304         .link_reset     = smsc75xx_link_reset,
2305         .reset          = smsc75xx_reset,
2306         .rx_fixup       = smsc75xx_rx_fixup,
2307         .tx_fixup       = smsc75xx_tx_fixup,
2308         .status         = smsc75xx_status,
2309         .manage_power   = smsc75xx_manage_power,
2310         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2311 };
2312
2313 static const struct usb_device_id products[] = {
2314         {
2315                 /* SMSC7500 USB Gigabit Ethernet Device */
2316                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2317                 .driver_info = (unsigned long) &smsc75xx_info,
2318         },
2319         {
2320                 /* SMSC7500 USB Gigabit Ethernet Device */
2321                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2322                 .driver_info = (unsigned long) &smsc75xx_info,
2323         },
2324         { },            /* END */
2325 };
2326 MODULE_DEVICE_TABLE(usb, products);
2327
2328 static struct usb_driver smsc75xx_driver = {
2329         .name           = SMSC_CHIPNAME,
2330         .id_table       = products,
2331         .probe          = usbnet_probe,
2332         .suspend        = smsc75xx_suspend,
2333         .resume         = smsc75xx_resume,
2334         .reset_resume   = smsc75xx_resume,
2335         .disconnect     = usbnet_disconnect,
2336         .disable_hub_initiated_lpm = 1,
2337         .supports_autosuspend = 1,
2338 };
2339
2340 module_usb_driver(smsc75xx_driver);
2341
2342 MODULE_AUTHOR("Nancy Lin");
2343 MODULE_AUTHOR("Steve Glendinning <[email protected]>");
2344 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2345 MODULE_LICENSE("GPL");