drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include <linux/of_net.h>
  33 #include "smsc75xx.h"
  34
  35 #define SMSC_CHIPNAME                   "smsc75xx"
  36 #define SMSC_DRIVER_VERSION             "1.0.0"
  37 #define HS_USB_PKT_SIZE                 (512)
  38 #define FS_USB_PKT_SIZE                 (64)
  39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  42 #define MAX_SINGLE_PACKET_SIZE          (9000)
  43 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  44 #define EEPROM_MAC_OFFSET               (0x01)
  45 #define DEFAULT_TX_CSUM_ENABLE          (true)
  46 #define DEFAULT_RX_CSUM_ENABLE          (true)
  47 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC75XX_TX_OVERHEAD            (8)
  49 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  50 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  51 #define USB_VENDOR_ID_SMSC              (0x0424)
  52 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  53 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  54 #define RXW_PADDING                     2
  55 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  56                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  57
  58 #define SUSPEND_SUSPEND0                (0x01)
  59 #define SUSPEND_SUSPEND1                (0x02)
  60 #define SUSPEND_SUSPEND2                (0x04)
  61 #define SUSPEND_SUSPEND3                (0x08)
  62 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  63                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  64
  65 struct smsc75xx_priv {
  66         struct usbnet *dev;
  67         u32 rfe_ctl;
  68         u32 wolopts;
  69         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  70         struct mutex dataport_mutex;
  71         spinlock_t rfe_ctl_lock;
  72         struct work_struct set_multicast;
  73         u8 suspend_flags;
  74 };
  75
  76 struct usb_context {
  77         struct usb_ctrlrequest req;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int smsc75xx_link_ok_nopm(struct usbnet *dev);
  86 static int smsc75xx_phy_gig_workaround(struct usbnet *dev);
  87
  88 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  89                                             u32 *data, int in_pm)
  90 {
  91         u32 buf;
  92         int ret;
  93         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  94
  95         BUG_ON(!dev);
  96
  97         if (!in_pm)
  98                 fn = usbnet_read_cmd;
  99         else
 100                 fn = usbnet_read_cmd_nopm;
 101
 102         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 103                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 104                  0, index, &buf, 4);
 105         if (unlikely(ret < 0)) {
 106                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 107                             index, ret);
 108                 return ret;
 109         }
 110
 111         le32_to_cpus(&buf);
 112         *data = buf;
 113
 114         return ret;
 115 }
 116
 117 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 118                                              u32 data, int in_pm)
 119 {
 120         u32 buf;
 121         int ret;
 122         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 123
 124         BUG_ON(!dev);
 125
 126         if (!in_pm)
 127                 fn = usbnet_write_cmd;
 128         else
 129                 fn = usbnet_write_cmd_nopm;
 130
 131         buf = data;
 132         cpu_to_le32s(&buf);
 133
 134         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 135                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 136                  0, index, &buf, 4);
 137         if (unlikely(ret < 0))
 138                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 139                             index, ret);
 140
 141         return ret;
 142 }
 143
 144 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 145                                                u32 *data)
 146 {
 147         return __smsc75xx_read_reg(dev, index, data, 1);
 148 }
 149
 150 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 151                                                 u32 data)
 152 {
 153         return __smsc75xx_write_reg(dev, index, data, 1);
 154 }
 155
 156 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 157                                           u32 *data)
 158 {
 159         return __smsc75xx_read_reg(dev, index, data, 0);
 160 }
 161
 162 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 163                                            u32 data)
 164 {
 165         return __smsc75xx_write_reg(dev, index, data, 0);
 166 }
 167
 168 /* Loop until the read is completed with timeout
 169  * called with phy_mutex held */
 170 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 171                                                      int in_pm)
 172 {
 173         unsigned long start_time = jiffies;
 174         u32 val;
 175         int ret;
 176
 177         do {
 178                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 179                 if (ret < 0) {
 180                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 181                         return ret;
 182                 }
 183
 184                 if (!(val & MII_ACCESS_BUSY))
 185                         return 0;
 186         } while (!time_after(jiffies, start_time + HZ));
 187
 188         return -EIO;
 189 }
 190
 191 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 192                                 int in_pm)
 193 {
 194         struct usbnet *dev = netdev_priv(netdev);
 195         u32 val, addr;
 196         int ret;
 197
 198         mutex_lock(&dev->phy_mutex);
 199
 200         /* confirm MII not busy */
 201         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 202         if (ret < 0) {
 203                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 204                 goto done;
 205         }
 206
 207         /* set the address, index & direction (read from PHY) */
 208         phy_id &= dev->mii.phy_id_mask;
 209         idx &= dev->mii.reg_num_mask;
 210         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 211                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 212                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 213         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 214         if (ret < 0) {
 215                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 216                 goto done;
 217         }
 218
 219         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 220         if (ret < 0) {
 221                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 222                 goto done;
 223         }
 224
 225         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 226         if (ret < 0) {
 227                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 228                 goto done;
 229         }
 230
 231         ret = (u16)(val & 0xFFFF);
 232
 233 done:
 234         mutex_unlock(&dev->phy_mutex);
 235         return ret;
 236 }
 237
 238 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 239                                   int idx, int regval, int in_pm)
 240 {
 241         struct usbnet *dev = netdev_priv(netdev);
 242         u32 val, addr;
 243         int ret;
 244
 245         mutex_lock(&dev->phy_mutex);
 246
 247         /* confirm MII not busy */
 248         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 249         if (ret < 0) {
 250                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 251                 goto done;
 252         }
 253
 254         val = regval;
 255         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 256         if (ret < 0) {
 257                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 258                 goto done;
 259         }
 260
 261         /* set the address, index & direction (write to PHY) */
 262         phy_id &= dev->mii.phy_id_mask;
 263         idx &= dev->mii.reg_num_mask;
 264         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 265                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 266                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 267         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 268         if (ret < 0) {
 269                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 270                 goto done;
 271         }
 272
 273         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 274         if (ret < 0) {
 275                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 276                 goto done;
 277         }
 278
 279 done:
 280         mutex_unlock(&dev->phy_mutex);
 281 }
 282
 283 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 284                                    int idx)
 285 {
 286         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 287 }
 288
 289 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 290                                      int idx, int regval)
 291 {
 292         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 293 }
 294
 295 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 296 {
 297         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 298 }
 299
 300 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 301                                 int regval)
 302 {
 303         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 304 }
 305
 306 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 307 {
 308         unsigned long start_time = jiffies;
 309         u32 val;
 310         int ret;
 311
 312         do {
 313                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 314                 if (ret < 0) {
 315                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 316                         return ret;
 317                 }
 318
 319                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 320                         break;
 321                 udelay(40);
 322         } while (!time_after(jiffies, start_time + HZ));
 323
 324         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 325                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 326                 return -EIO;
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 333 {
 334         unsigned long start_time = jiffies;
 335         u32 val;
 336         int ret;
 337
 338         do {
 339                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 340                 if (ret < 0) {
 341                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 342                         return ret;
 343                 }
 344
 345                 if (!(val & E2P_CMD_BUSY))
 346                         return 0;
 347
 348                 udelay(40);
 349         } while (!time_after(jiffies, start_time + HZ));
 350
 351         netdev_warn(dev->net, "EEPROM is busy\n");
 352         return -EIO;
 353 }
 354
 355 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 356                                 u8 *data)
 357 {
 358         u32 val;
 359         int i, ret;
 360
 361         BUG_ON(!dev);
 362         BUG_ON(!data);
 363
 364         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 365         if (ret)
 366                 return ret;
 367
 368         for (i = 0; i < length; i++) {
 369                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 370                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 371                 if (ret < 0) {
 372                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 373                         return ret;
 374                 }
 375
 376                 ret = smsc75xx_wait_eeprom(dev);
 377                 if (ret < 0)
 378                         return ret;
 379
 380                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 381                 if (ret < 0) {
 382                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 383                         return ret;
 384                 }
 385
 386                 data[i] = val & 0xFF;
 387                 offset++;
 388         }
 389
 390         return 0;
 391 }
 392
 393 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 394                                  u8 *data)
 395 {
 396         u32 val;
 397         int i, ret;
 398
 399         BUG_ON(!dev);
 400         BUG_ON(!data);
 401
 402         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 403         if (ret)
 404                 return ret;
 405
 406         /* Issue write/erase enable command */
 407         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 408         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 409         if (ret < 0) {
 410                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 411                 return ret;
 412         }
 413
 414         ret = smsc75xx_wait_eeprom(dev);
 415         if (ret < 0)
 416                 return ret;
 417
 418         for (i = 0; i < length; i++) {
 419
 420                 /* Fill data register */
 421                 val = data[i];
 422                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 423                 if (ret < 0) {
 424                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 425                         return ret;
 426                 }
 427
 428                 /* Send "write" command */
 429                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 430                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 431                 if (ret < 0) {
 432                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 433                         return ret;
 434                 }
 435
 436                 ret = smsc75xx_wait_eeprom(dev);
 437                 if (ret < 0)
 438                         return ret;
 439
 440                 offset++;
 441         }
 442
 443         return 0;
 444 }
 445
 446 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 447 {
 448         int i, ret;
 449
 450         for (i = 0; i < 100; i++) {
 451                 u32 dp_sel;
 452                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 453                 if (ret < 0) {
 454                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 455                         return ret;
 456                 }
 457
 458                 if (dp_sel & DP_SEL_DPRDY)
 459                         return 0;
 460
 461                 udelay(40);
 462         }
 463
 464         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 465
 466         return -EIO;
 467 }
 468
 469 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 470                                    u32 length, u32 *buf)
 471 {
 472         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 473         u32 dp_sel;
 474         int i, ret;
 475
 476         mutex_lock(&pdata->dataport_mutex);
 477
 478         ret = smsc75xx_dataport_wait_not_busy(dev);
 479         if (ret < 0) {
 480                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 481                 goto done;
 482         }
 483
 484         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 485         if (ret < 0) {
 486                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 487                 goto done;
 488         }
 489
 490         dp_sel &= ~DP_SEL_RSEL;
 491         dp_sel |= ram_select;
 492         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 493         if (ret < 0) {
 494                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 495                 goto done;
 496         }
 497
 498         for (i = 0; i < length; i++) {
 499                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 500                 if (ret < 0) {
 501                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 502                         goto done;
 503                 }
 504
 505                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 506                 if (ret < 0) {
 507                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 508                         goto done;
 509                 }
 510
 511                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 512                 if (ret < 0) {
 513                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 514                         goto done;
 515                 }
 516
 517                 ret = smsc75xx_dataport_wait_not_busy(dev);
 518                 if (ret < 0) {
 519                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 520                         goto done;
 521                 }
 522         }
 523
 524 done:
 525         mutex_unlock(&pdata->dataport_mutex);
 526         return ret;
 527 }
 528
 529 /* returns hash bit number for given MAC address */
 530 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 531 {
 532         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 533 }
 534
 535 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 536 {
 537         struct smsc75xx_priv *pdata =
 538                 container_of(param, struct smsc75xx_priv, set_multicast);
 539         struct usbnet *dev = pdata->dev;
 540         int ret;
 541
 542         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 543                   pdata->rfe_ctl);
 544
 545         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 546                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 547
 548         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 549         if (ret < 0)
 550                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 551 }
 552
 553 static void smsc75xx_set_multicast(struct net_device *netdev)
 554 {
 555         struct usbnet *dev = netdev_priv(netdev);
 556         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 557         unsigned long flags;
 558         int i;
 559
 560         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 561
 562         pdata->rfe_ctl &=
 563                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 564         pdata->rfe_ctl |= RFE_CTL_AB;
 565
 566         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 567                 pdata->multicast_hash_table[i] = 0;
 568
 569         if (dev->net->flags & IFF_PROMISC) {
 570                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 572         } else if (dev->net->flags & IFF_ALLMULTI) {
 573                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 574                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 575         } else if (!netdev_mc_empty(dev->net)) {
 576                 struct netdev_hw_addr *ha;
 577
 578                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 579
 580                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 581
 582                 netdev_for_each_mc_addr(ha, netdev) {
 583                         u32 bitnum = smsc75xx_hash(ha->addr);
 584                         pdata->multicast_hash_table[bitnum / 32] |=
 585                                 (1 << (bitnum % 32));
 586                 }
 587         } else {
 588                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 589                 pdata->rfe_ctl |= RFE_CTL_DPF;
 590         }
 591
 592         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 593
 594         /* defer register writes to a sleepable context */
 595         schedule_work(&pdata->set_multicast);
 596 }
 597
 598 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 599                                             u16 lcladv, u16 rmtadv)
 600 {
 601         u32 flow = 0, fct_flow = 0;
 602         int ret;
 603
 604         if (duplex == DUPLEX_FULL) {
 605                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 606
 607                 if (cap & FLOW_CTRL_TX) {
 608                         flow = (FLOW_TX_FCEN | 0xFFFF);
 609                         /* set fct_flow thresholds to 20% and 80% */
 610                         fct_flow = (8 << 8) | 32;
 611                 }
 612
 613                 if (cap & FLOW_CTRL_RX)
 614                         flow |= FLOW_RX_FCEN;
 615
 616                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 617                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 618                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 619         } else {
 620                 netif_dbg(dev, link, dev->net, "half duplex\n");
 621         }
 622
 623         ret = smsc75xx_write_reg(dev, FLOW, flow);
 624         if (ret < 0) {
 625                 netdev_warn(dev->net, "Error writing FLOW\n");
 626                 return ret;
 627         }
 628
 629         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 630         if (ret < 0) {
 631                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 632                 return ret;
 633         }
 634
 635         return 0;
 636 }
 637
 638 static int smsc75xx_link_reset(struct usbnet *dev)
 639 {
 640         struct mii_if_info *mii = &dev->mii;
 641         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 642         u16 lcladv, rmtadv;
 643         int ret;
 644
 645         /* write to clear phy interrupt status */
 646         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 647                 PHY_INT_SRC_CLEAR_ALL);
 648
 649         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 650         if (ret < 0) {
 651                 netdev_warn(dev->net, "Error writing INT_STS\n");
 652                 return ret;
 653         }
 654
 655         mii_check_media(mii, 1, 1);
 656         mii_ethtool_gset(&dev->mii, &ecmd);
 657         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 658         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 659
 660         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 661                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 662
 663         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 664 }
 665
 666 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 667 {
 668         u32 intdata;
 669
 670         if (urb->actual_length != 4) {
 671                 netdev_warn(dev->net, "unexpected urb length %d\n",
 672                             urb->actual_length);
 673                 return;
 674         }
 675
 676         memcpy(&intdata, urb->transfer_buffer, 4);
 677         le32_to_cpus(&intdata);
 678
 679         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 680
 681         if (intdata & INT_ENP_PHY_INT)
 682                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 683         else
 684                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 685                             intdata);
 686 }
 687
 688 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 689 {
 690         return MAX_EEPROM_SIZE;
 691 }
 692
 693 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 694                                        struct ethtool_eeprom *ee, u8 *data)
 695 {
 696         struct usbnet *dev = netdev_priv(netdev);
 697
 698         ee->magic = LAN75XX_EEPROM_MAGIC;
 699
 700         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 701 }
 702
 703 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 704                                        struct ethtool_eeprom *ee, u8 *data)
 705 {
 706         struct usbnet *dev = netdev_priv(netdev);
 707
 708         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 709                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 710                             ee->magic);
 711                 return -EINVAL;
 712         }
 713
 714         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 715 }
 716
 717 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 718                                      struct ethtool_wolinfo *wolinfo)
 719 {
 720         struct usbnet *dev = netdev_priv(net);
 721         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 722
 723         wolinfo->supported = SUPPORTED_WAKE;
 724         wolinfo->wolopts = pdata->wolopts;
 725 }
 726
 727 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 728                                     struct ethtool_wolinfo *wolinfo)
 729 {
 730         struct usbnet *dev = netdev_priv(net);
 731         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 732         int ret;
 733
 734         if (wolinfo->wolopts & ~SUPPORTED_WAKE)
 735                 return -EINVAL;
 736
 737         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 738
 739         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 740         if (ret < 0)
 741                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 742
 743         return ret;
 744 }
 745
 746 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 747         .get_link       = usbnet_get_link,
 748         .nway_reset     = usbnet_nway_reset,
 749         .get_drvinfo    = usbnet_get_drvinfo,
 750         .get_msglevel   = usbnet_get_msglevel,
 751         .set_msglevel   = usbnet_set_msglevel,
 752         .get_settings   = usbnet_get_settings,
 753         .set_settings   = usbnet_set_settings,
 754         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 755         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 756         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 757         .get_wol        = smsc75xx_ethtool_get_wol,
 758         .set_wol        = smsc75xx_ethtool_set_wol,
 759 };
 760
 761 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 762 {
 763         struct usbnet *dev = netdev_priv(netdev);
 764
 765         if (!netif_running(netdev))
 766                 return -EINVAL;
 767
 768         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 769 }
 770
 771 static void smsc75xx_init_mac_address(struct usbnet *dev)
 772 {
 773         const u8 *mac_addr;
 774
 775         /* maybe the boot loader passed the MAC address in devicetree */
 776         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 777         if (mac_addr) {
 778                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 779                 return;
 780         }
 781
 782         /* try reading mac address from EEPROM */
 783         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 784                         dev->net->dev_addr) == 0) {
 785                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 786                         /* eeprom values are valid so use them */
 787                         netif_dbg(dev, ifup, dev->net,
 788                                   "MAC address read from EEPROM\n");
 789                         return;
 790                 }
 791         }
 792
 793         /* no useful static MAC address found. generate a random one */
 794         eth_hw_addr_random(dev->net);
 795         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 796 }
 797
 798 static int smsc75xx_set_mac_address(struct usbnet *dev)
 799 {
 800         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 801                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 802         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 803
 804         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 805         if (ret < 0) {
 806                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 807                 return ret;
 808         }
 809
 810         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 811         if (ret < 0) {
 812                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 813                 return ret;
 814         }
 815
 816         addr_hi |= ADDR_FILTX_FB_VALID;
 817         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 818         if (ret < 0) {
 819                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 820                 return ret;
 821         }
 822
 823         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 824         if (ret < 0)
 825                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 826
 827         return ret;
 828 }
 829
 830 static int smsc75xx_phy_initialize(struct usbnet *dev)
 831 {
 832         int bmcr, ret, timeout = 0;
 833
 834         /* Initialize MII structure */
 835         dev->mii.dev = dev->net;
 836         dev->mii.mdio_read = smsc75xx_mdio_read;
 837         dev->mii.mdio_write = smsc75xx_mdio_write;
 838         dev->mii.phy_id_mask = 0x1f;
 839         dev->mii.reg_num_mask = 0x1f;
 840         dev->mii.supports_gmii = 1;
 841         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 842
 843         /* reset phy and wait for reset to complete */
 844         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 845
 846         do {
 847                 msleep(10);
 848                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 849                 if (bmcr < 0) {
 850                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 851                         return bmcr;
 852                 }
 853                 timeout++;
 854         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 855
 856         if (timeout >= 100) {
 857                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 858                 return -EIO;
 859         }
 860
 861         /* phy workaround for gig link */
 862         smsc75xx_phy_gig_workaround(dev);
 863
 864         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 865                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 866                 ADVERTISE_PAUSE_ASYM);
 867         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 868                 ADVERTISE_1000FULL);
 869
 870         /* read and write to clear phy interrupt status */
 871         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 872         if (ret < 0) {
 873                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 874                 return ret;
 875         }
 876
 877         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 878
 879         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 880                 PHY_INT_MASK_DEFAULT);
 881         mii_nway_restart(&dev->mii);
 882
 883         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 884         return 0;
 885 }
 886
 887 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 888 {
 889         int ret = 0;
 890         u32 buf;
 891         bool rxenabled;
 892
 893         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 894         if (ret < 0) {
 895                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 896                 return ret;
 897         }
 898
 899         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 900
 901         if (rxenabled) {
 902                 buf &= ~MAC_RX_RXEN;
 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
 910         /* add 4 to size for FCS */
 911         buf &= ~MAC_RX_MAX_SIZE;
 912         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 913
 914         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 915         if (ret < 0) {
 916                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 917                 return ret;
 918         }
 919
 920         if (rxenabled) {
 921                 buf |= MAC_RX_RXEN;
 922                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 923                 if (ret < 0) {
 924                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 925                         return ret;
 926                 }
 927         }
 928
 929         return 0;
 930 }
 931
 932 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 933 {
 934         struct usbnet *dev = netdev_priv(netdev);
 935         int ret;
 936
 937         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 938                 return -EINVAL;
 939
 940         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 941         if (ret < 0) {
 942                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 943                 return ret;
 944         }
 945
 946         return usbnet_change_mtu(netdev, new_mtu);
 947 }
 948
 949 /* Enable or disable Rx checksum offload engine */
 950 static int smsc75xx_set_features(struct net_device *netdev,
 951         netdev_features_t features)
 952 {
 953         struct usbnet *dev = netdev_priv(netdev);
 954         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 955         unsigned long flags;
 956         int ret;
 957
 958         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 959
 960         if (features & NETIF_F_RXCSUM)
 961                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 962         else
 963                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 964
 965         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 966         /* it's racing here! */
 967
 968         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 969         if (ret < 0) {
 970                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 971                 return ret;
 972         }
 973         return 0;
 974 }
 975
 976 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 977 {
 978         int timeout = 0;
 979
 980         do {
 981                 u32 buf;
 982                 int ret;
 983
 984                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 985
 986                 if (ret < 0) {
 987                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 988                         return ret;
 989                 }
 990
 991                 if (buf & PMT_CTL_DEV_RDY)
 992                         return 0;
 993
 994                 msleep(10);
 995                 timeout++;
 996         } while (timeout < 100);
 997
 998         netdev_warn(dev->net, "timeout waiting for device ready\n");
 999         return -EIO;
1000 }
1001
1002 static int smsc75xx_phy_gig_workaround(struct usbnet *dev)
1003 {
1004         struct mii_if_info *mii = &dev->mii;
1005         int ret = 0, timeout = 0;
1006         u32 buf, link_up = 0;
1007
1008         /* Set the phy in Gig loopback */
1009         smsc75xx_mdio_write(dev->net, mii->phy_id, MII_BMCR, 0x4040);
1010
1011         /* Wait for the link up */
1012         do {
1013                 link_up = smsc75xx_link_ok_nopm(dev);
1014                 usleep_range(10000, 20000);
1015                 timeout++;
1016         } while ((!link_up) && (timeout < 1000));
1017
1018         if (timeout >= 1000) {
1019                 netdev_warn(dev->net, "Timeout waiting for PHY link up\n");
1020                 return -EIO;
1021         }
1022
1023         /* phy reset */
1024         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1025         if (ret < 0) {
1026                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1027                 return ret;
1028         }
1029
1030         buf |= PMT_CTL_PHY_RST;
1031
1032         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1033         if (ret < 0) {
1034                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1035                 return ret;
1036         }
1037
1038         timeout = 0;
1039         do {
1040                 usleep_range(10000, 20000);
1041                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1042                 if (ret < 0) {
1043                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n",
1044                                     ret);
1045                         return ret;
1046                 }
1047                 timeout++;
1048         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1049
1050         if (timeout >= 100) {
1051                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1052                 return -EIO;
1053         }
1054
1055         return 0;
1056 }
1057
1058 static int smsc75xx_reset(struct usbnet *dev)
1059 {
1060         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1061         u32 buf;
1062         int ret = 0, timeout;
1063
1064         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
1065
1066         ret = smsc75xx_wait_ready(dev, 0);
1067         if (ret < 0) {
1068                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1069                 return ret;
1070         }
1071
1072         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1073         if (ret < 0) {
1074                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1075                 return ret;
1076         }
1077
1078         buf |= HW_CFG_LRST;
1079
1080         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1081         if (ret < 0) {
1082                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1083                 return ret;
1084         }
1085
1086         timeout = 0;
1087         do {
1088                 msleep(10);
1089                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1090                 if (ret < 0) {
1091                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1092                         return ret;
1093                 }
1094                 timeout++;
1095         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1096
1097         if (timeout >= 100) {
1098                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1099                 return -EIO;
1100         }
1101
1102         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1103
1104         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1105         if (ret < 0) {
1106                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1107                 return ret;
1108         }
1109
1110         buf |= PMT_CTL_PHY_RST;
1111
1112         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1113         if (ret < 0) {
1114                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1115                 return ret;
1116         }
1117
1118         timeout = 0;
1119         do {
1120                 msleep(10);
1121                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1122                 if (ret < 0) {
1123                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1124                         return ret;
1125                 }
1126                 timeout++;
1127         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1128
1129         if (timeout >= 100) {
1130                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1131                 return -EIO;
1132         }
1133
1134         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1135
1136         ret = smsc75xx_set_mac_address(dev);
1137         if (ret < 0) {
1138                 netdev_warn(dev->net, "Failed to set mac address\n");
1139                 return ret;
1140         }
1141
1142         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1143                   dev->net->dev_addr);
1144
1145         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1146         if (ret < 0) {
1147                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1148                 return ret;
1149         }
1150
1151         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1152                   buf);
1153
1154         buf |= HW_CFG_BIR;
1155
1156         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1157         if (ret < 0) {
1158                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1159                 return ret;
1160         }
1161
1162         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1163         if (ret < 0) {
1164                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1165                 return ret;
1166         }
1167
1168         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1169                   buf);
1170
1171         if (!turbo_mode) {
1172                 buf = 0;
1173                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1174         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1175                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1176                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1177         } else {
1178                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1179                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1180         }
1181
1182         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1183                   (ulong)dev->rx_urb_size);
1184
1185         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1186         if (ret < 0) {
1187                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1188                 return ret;
1189         }
1190
1191         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1192         if (ret < 0) {
1193                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1194                 return ret;
1195         }
1196
1197         netif_dbg(dev, ifup, dev->net,
1198                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1199
1200         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1201         if (ret < 0) {
1202                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1203                 return ret;
1204         }
1205
1206         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1207         if (ret < 0) {
1208                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1209                 return ret;
1210         }
1211
1212         netif_dbg(dev, ifup, dev->net,
1213                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1214
1215         if (turbo_mode) {
1216                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1217                 if (ret < 0) {
1218                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1219                         return ret;
1220                 }
1221
1222                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1223
1224                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1225
1226                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1227                 if (ret < 0) {
1228                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1229                         return ret;
1230                 }
1231
1232                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1233                 if (ret < 0) {
1234                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1235                         return ret;
1236                 }
1237
1238                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1239         }
1240
1241         /* set FIFO sizes */
1242         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1243         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1244         if (ret < 0) {
1245                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1246                 return ret;
1247         }
1248
1249         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1250
1251         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1252         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1253         if (ret < 0) {
1254                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1255                 return ret;
1256         }
1257
1258         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1259
1260         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1261         if (ret < 0) {
1262                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1263                 return ret;
1264         }
1265
1266         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1267         if (ret < 0) {
1268                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1269                 return ret;
1270         }
1271
1272         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1273
1274         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1275         if (ret < 0) {
1276                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1277                 return ret;
1278         }
1279
1280         /* only set default GPIO/LED settings if no EEPROM is detected */
1281         if (!(buf & E2P_CMD_LOADED)) {
1282                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1283                 if (ret < 0) {
1284                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1285                         return ret;
1286                 }
1287
1288                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1289                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1290
1291                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1292                 if (ret < 0) {
1293                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1294                         return ret;
1295                 }
1296         }
1297
1298         ret = smsc75xx_write_reg(dev, FLOW, 0);
1299         if (ret < 0) {
1300                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1301                 return ret;
1302         }
1303
1304         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1305         if (ret < 0) {
1306                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1307                 return ret;
1308         }
1309
1310         /* Don't need rfe_ctl_lock during initialisation */
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         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1318
1319         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1320         if (ret < 0) {
1321                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1322                 return ret;
1323         }
1324
1325         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1326         if (ret < 0) {
1327                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1328                 return ret;
1329         }
1330
1331         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1332                   pdata->rfe_ctl);
1333
1334         /* Enable or disable checksum offload engines */
1335         smsc75xx_set_features(dev->net, dev->net->features);
1336
1337         smsc75xx_set_multicast(dev->net);
1338
1339         ret = smsc75xx_phy_initialize(dev);
1340         if (ret < 0) {
1341                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1342                 return ret;
1343         }
1344
1345         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1346         if (ret < 0) {
1347                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1348                 return ret;
1349         }
1350
1351         /* enable PHY interrupts */
1352         buf |= INT_ENP_PHY_INT;
1353
1354         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1355         if (ret < 0) {
1356                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1357                 return ret;
1358         }
1359
1360         /* allow mac to detect speed and duplex from phy */
1361         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1362         if (ret < 0) {
1363                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1364                 return ret;
1365         }
1366
1367         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1368         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1369         if (ret < 0) {
1370                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1371                 return ret;
1372         }
1373
1374         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1375         if (ret < 0) {
1376                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1377                 return ret;
1378         }
1379
1380         buf |= MAC_TX_TXEN;
1381
1382         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1383         if (ret < 0) {
1384                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1385                 return ret;
1386         }
1387
1388         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1389
1390         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1391         if (ret < 0) {
1392                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1393                 return ret;
1394         }
1395
1396         buf |= FCT_TX_CTL_EN;
1397
1398         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1399         if (ret < 0) {
1400                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1401                 return ret;
1402         }
1403
1404         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1405
1406         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1407         if (ret < 0) {
1408                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1409                 return ret;
1410         }
1411
1412         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1413         if (ret < 0) {
1414                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1415                 return ret;
1416         }
1417
1418         buf |= MAC_RX_RXEN;
1419
1420         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1421         if (ret < 0) {
1422                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1423                 return ret;
1424         }
1425
1426         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1427
1428         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1429         if (ret < 0) {
1430                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1431                 return ret;
1432         }
1433
1434         buf |= FCT_RX_CTL_EN;
1435
1436         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1437         if (ret < 0) {
1438                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1439                 return ret;
1440         }
1441
1442         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1443
1444         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1445         return 0;
1446 }
1447
1448 static const struct net_device_ops smsc75xx_netdev_ops = {
1449         .ndo_open               = usbnet_open,
1450         .ndo_stop               = usbnet_stop,
1451         .ndo_start_xmit         = usbnet_start_xmit,
1452         .ndo_tx_timeout         = usbnet_tx_timeout,
1453         .ndo_change_mtu         = smsc75xx_change_mtu,
1454         .ndo_set_mac_address    = eth_mac_addr,
1455         .ndo_validate_addr      = eth_validate_addr,
1456         .ndo_do_ioctl           = smsc75xx_ioctl,
1457         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1458         .ndo_set_features       = smsc75xx_set_features,
1459 };
1460
1461 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1462 {
1463         struct smsc75xx_priv *pdata = NULL;
1464         int ret;
1465
1466         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1467
1468         ret = usbnet_get_endpoints(dev, intf);
1469         if (ret < 0) {
1470                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1471                 return ret;
1472         }
1473
1474         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1475                                               GFP_KERNEL);
1476
1477         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1478         if (!pdata)
1479                 return -ENOMEM;
1480
1481         pdata->dev = dev;
1482
1483         spin_lock_init(&pdata->rfe_ctl_lock);
1484         mutex_init(&pdata->dataport_mutex);
1485
1486         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1487
1488         if (DEFAULT_TX_CSUM_ENABLE)
1489                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1490
1491         if (DEFAULT_RX_CSUM_ENABLE)
1492                 dev->net->features |= NETIF_F_RXCSUM;
1493
1494         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1495                                 NETIF_F_RXCSUM;
1496
1497         ret = smsc75xx_wait_ready(dev, 0);
1498         if (ret < 0) {
1499                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1500                 goto free_pdata;
1501         }
1502
1503         smsc75xx_init_mac_address(dev);
1504
1505         /* Init all registers */
1506         ret = smsc75xx_reset(dev);
1507         if (ret < 0) {
1508                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1509                 goto cancel_work;
1510         }
1511
1512         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1513         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1514         dev->net->flags |= IFF_MULTICAST;
1515         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1516         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1517         return 0;
1518
1519 cancel_work:
1520         cancel_work_sync(&pdata->set_multicast);
1521 free_pdata:
1522         kfree(pdata);
1523         dev->data[0] = 0;
1524         return ret;
1525 }
1526
1527 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1528 {
1529         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1530         if (pdata) {
1531                 cancel_work_sync(&pdata->set_multicast);
1532                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1533                 kfree(pdata);
1534                 dev->data[0] = 0;
1535         }
1536 }
1537
1538 static u16 smsc_crc(const u8 *buffer, size_t len)
1539 {
1540         return bitrev16(crc16(0xFFFF, buffer, len));
1541 }
1542
1543 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1544                                u32 wuf_mask1)
1545 {
1546         int cfg_base = WUF_CFGX + filter * 4;
1547         int mask_base = WUF_MASKX + filter * 16;
1548         int ret;
1549
1550         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1551         if (ret < 0) {
1552                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1553                 return ret;
1554         }
1555
1556         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
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 + 4, 0);
1563         if (ret < 0) {
1564                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1565                 return ret;
1566         }
1567
1568         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1569         if (ret < 0) {
1570                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1571                 return ret;
1572         }
1573
1574         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1575         if (ret < 0) {
1576                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1577                 return ret;
1578         }
1579
1580         return 0;
1581 }
1582
1583 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1584 {
1585         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1586         u32 val;
1587         int ret;
1588
1589         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1590         if (ret < 0) {
1591                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1592                 return ret;
1593         }
1594
1595         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1596         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1597
1598         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1599         if (ret < 0) {
1600                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1601                 return ret;
1602         }
1603
1604         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1605
1606         return 0;
1607 }
1608
1609 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1610 {
1611         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1612         u32 val;
1613         int ret;
1614
1615         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1616         if (ret < 0) {
1617                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1618                 return ret;
1619         }
1620
1621         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1622         val |= PMT_CTL_SUS_MODE_1;
1623
1624         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625         if (ret < 0) {
1626                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627                 return ret;
1628         }
1629
1630         /* clear wol status, enable energy detection */
1631         val &= ~PMT_CTL_WUPS;
1632         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1633
1634         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1635         if (ret < 0) {
1636                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1637                 return ret;
1638         }
1639
1640         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1641
1642         return 0;
1643 }
1644
1645 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1646 {
1647         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1648         u32 val;
1649         int ret;
1650
1651         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1652         if (ret < 0) {
1653                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1654                 return ret;
1655         }
1656
1657         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1658         val |= PMT_CTL_SUS_MODE_2;
1659
1660         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1661         if (ret < 0) {
1662                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1663                 return ret;
1664         }
1665
1666         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1667
1668         return 0;
1669 }
1670
1671 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1672 {
1673         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1674         u32 val;
1675         int ret;
1676
1677         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1678         if (ret < 0) {
1679                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1680                 return ret;
1681         }
1682
1683         if (val & FCT_RX_CTL_RXUSED) {
1684                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1685                 return -EBUSY;
1686         }
1687
1688         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1689         if (ret < 0) {
1690                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1691                 return ret;
1692         }
1693
1694         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1695         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1696
1697         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1698         if (ret < 0) {
1699                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1700                 return ret;
1701         }
1702
1703         /* clear wol status */
1704         val &= ~PMT_CTL_WUPS;
1705         val |= PMT_CTL_WUPS_WOL;
1706
1707         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1708         if (ret < 0) {
1709                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1710                 return ret;
1711         }
1712
1713         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1714
1715         return 0;
1716 }
1717
1718 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1719 {
1720         struct mii_if_info *mii = &dev->mii;
1721         int ret;
1722
1723         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1724
1725         /* read to clear */
1726         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1727         if (ret < 0) {
1728                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1729                 return ret;
1730         }
1731
1732         /* enable interrupt source */
1733         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1734         if (ret < 0) {
1735                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1736                 return ret;
1737         }
1738
1739         ret |= mask;
1740
1741         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1742
1743         return 0;
1744 }
1745
1746 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1747 {
1748         struct mii_if_info *mii = &dev->mii;
1749         int ret;
1750
1751         /* first, a dummy read, needed to latch some MII phys */
1752         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1753         if (ret < 0) {
1754                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1755                 return ret;
1756         }
1757
1758         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1759         if (ret < 0) {
1760                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1761                 return ret;
1762         }
1763
1764         return !!(ret & BMSR_LSTATUS);
1765 }
1766
1767 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1768 {
1769         int ret;
1770
1771         if (!netif_running(dev->net)) {
1772                 /* interface is ifconfig down so fully power down hw */
1773                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1774                 return smsc75xx_enter_suspend2(dev);
1775         }
1776
1777         if (!link_up) {
1778                 /* link is down so enter EDPD mode */
1779                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1780
1781                 /* enable PHY wakeup events for if cable is attached */
1782                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1783                         PHY_INT_MASK_ANEG_COMP);
1784                 if (ret < 0) {
1785                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1786                         return ret;
1787                 }
1788
1789                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1790                 return smsc75xx_enter_suspend1(dev);
1791         }
1792
1793         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1794         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1795                 PHY_INT_MASK_LINK_DOWN);
1796         if (ret < 0) {
1797                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1798                 return ret;
1799         }
1800
1801         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1802         return smsc75xx_enter_suspend3(dev);
1803 }
1804
1805 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1806 {
1807         struct usbnet *dev = usb_get_intfdata(intf);
1808         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1809         u32 val, link_up;
1810         int ret;
1811
1812         ret = usbnet_suspend(intf, message);
1813         if (ret < 0) {
1814                 netdev_warn(dev->net, "usbnet_suspend error\n");
1815                 return ret;
1816         }
1817
1818         if (pdata->suspend_flags) {
1819                 netdev_warn(dev->net, "error during last resume\n");
1820                 pdata->suspend_flags = 0;
1821         }
1822
1823         /* determine if link is up using only _nopm functions */
1824         link_up = smsc75xx_link_ok_nopm(dev);
1825
1826         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1827                 ret = smsc75xx_autosuspend(dev, link_up);
1828                 goto done;
1829         }
1830
1831         /* if we get this far we're not autosuspending */
1832         /* if no wol options set, or if link is down and we're not waking on
1833          * PHY activity, enter lowest power SUSPEND2 mode
1834          */
1835         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1836                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1837                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1838
1839                 /* disable energy detect (link up) & wake up events */
1840                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1841                 if (ret < 0) {
1842                         netdev_warn(dev->net, "Error reading WUCSR\n");
1843                         goto done;
1844                 }
1845
1846                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1847
1848                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1849                 if (ret < 0) {
1850                         netdev_warn(dev->net, "Error writing WUCSR\n");
1851                         goto done;
1852                 }
1853
1854                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1855                 if (ret < 0) {
1856                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1857                         goto done;
1858                 }
1859
1860                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1861
1862                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1863                 if (ret < 0) {
1864                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1865                         goto done;
1866                 }
1867
1868                 ret = smsc75xx_enter_suspend2(dev);
1869                 goto done;
1870         }
1871
1872         if (pdata->wolopts & WAKE_PHY) {
1873                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1874                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1875                 if (ret < 0) {
1876                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1877                         goto done;
1878                 }
1879
1880                 /* if link is down then configure EDPD and enter SUSPEND1,
1881                  * otherwise enter SUSPEND0 below
1882                  */
1883                 if (!link_up) {
1884                         struct mii_if_info *mii = &dev->mii;
1885                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1886
1887                         /* enable energy detect power-down mode */
1888                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1889                                 PHY_MODE_CTRL_STS);
1890                         if (ret < 0) {
1891                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1892                                 goto done;
1893                         }
1894
1895                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1896
1897                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1898                                 PHY_MODE_CTRL_STS, ret);
1899
1900                         /* enter SUSPEND1 mode */
1901                         ret = smsc75xx_enter_suspend1(dev);
1902                         goto done;
1903                 }
1904         }
1905
1906         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1907                 int i, filter = 0;
1908
1909                 /* disable all filters */
1910                 for (i = 0; i < WUF_NUM; i++) {
1911                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1912                         if (ret < 0) {
1913                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1914                                 goto done;
1915                         }
1916                 }
1917
1918                 if (pdata->wolopts & WAKE_MCAST) {
1919                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1920                         netdev_info(dev->net, "enabling multicast detection\n");
1921
1922                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1923                                 | smsc_crc(mcast, 3);
1924                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1925                         if (ret < 0) {
1926                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1927                                 goto done;
1928                         }
1929                 }
1930
1931                 if (pdata->wolopts & WAKE_ARP) {
1932                         const u8 arp[] = {0x08, 0x06};
1933                         netdev_info(dev->net, "enabling ARP detection\n");
1934
1935                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1936                                 | smsc_crc(arp, 2);
1937                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1938                         if (ret < 0) {
1939                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1940                                 goto done;
1941                         }
1942                 }
1943
1944                 /* clear any pending pattern match packet status */
1945                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1946                 if (ret < 0) {
1947                         netdev_warn(dev->net, "Error reading WUCSR\n");
1948                         goto done;
1949                 }
1950
1951                 val |= WUCSR_WUFR;
1952
1953                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1954                 if (ret < 0) {
1955                         netdev_warn(dev->net, "Error writing WUCSR\n");
1956                         goto done;
1957                 }
1958
1959                 netdev_info(dev->net, "enabling packet match detection\n");
1960                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1961                 if (ret < 0) {
1962                         netdev_warn(dev->net, "Error reading WUCSR\n");
1963                         goto done;
1964                 }
1965
1966                 val |= WUCSR_WUEN;
1967
1968                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1969                 if (ret < 0) {
1970                         netdev_warn(dev->net, "Error writing WUCSR\n");
1971                         goto done;
1972                 }
1973         } else {
1974                 netdev_info(dev->net, "disabling packet match detection\n");
1975                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1976                 if (ret < 0) {
1977                         netdev_warn(dev->net, "Error reading WUCSR\n");
1978                         goto done;
1979                 }
1980
1981                 val &= ~WUCSR_WUEN;
1982
1983                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1984                 if (ret < 0) {
1985                         netdev_warn(dev->net, "Error writing WUCSR\n");
1986                         goto done;
1987                 }
1988         }
1989
1990         /* disable magic, bcast & unicast wakeup sources */
1991         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1992         if (ret < 0) {
1993                 netdev_warn(dev->net, "Error reading WUCSR\n");
1994                 goto done;
1995         }
1996
1997         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1998
1999         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2000         if (ret < 0) {
2001                 netdev_warn(dev->net, "Error writing WUCSR\n");
2002                 goto done;
2003         }
2004
2005         if (pdata->wolopts & WAKE_PHY) {
2006                 netdev_info(dev->net, "enabling PHY wakeup\n");
2007
2008                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2009                 if (ret < 0) {
2010                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2011                         goto done;
2012                 }
2013
2014                 /* clear wol status, enable energy detection */
2015                 val &= ~PMT_CTL_WUPS;
2016                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
2017
2018                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2019                 if (ret < 0) {
2020                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2021                         goto done;
2022                 }
2023         }
2024
2025         if (pdata->wolopts & WAKE_MAGIC) {
2026                 netdev_info(dev->net, "enabling magic packet wakeup\n");
2027                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2028                 if (ret < 0) {
2029                         netdev_warn(dev->net, "Error reading WUCSR\n");
2030                         goto done;
2031                 }
2032
2033                 /* clear any pending magic packet status */
2034                 val |= WUCSR_MPR | WUCSR_MPEN;
2035
2036                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2037                 if (ret < 0) {
2038                         netdev_warn(dev->net, "Error writing WUCSR\n");
2039                         goto done;
2040                 }
2041         }
2042
2043         if (pdata->wolopts & WAKE_BCAST) {
2044                 netdev_info(dev->net, "enabling broadcast detection\n");
2045                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2046                 if (ret < 0) {
2047                         netdev_warn(dev->net, "Error reading WUCSR\n");
2048                         goto done;
2049                 }
2050
2051                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
2052
2053                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2054                 if (ret < 0) {
2055                         netdev_warn(dev->net, "Error writing WUCSR\n");
2056                         goto done;
2057                 }
2058         }
2059
2060         if (pdata->wolopts & WAKE_UCAST) {
2061                 netdev_info(dev->net, "enabling unicast detection\n");
2062                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2063                 if (ret < 0) {
2064                         netdev_warn(dev->net, "Error reading WUCSR\n");
2065                         goto done;
2066                 }
2067
2068                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
2069
2070                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2071                 if (ret < 0) {
2072                         netdev_warn(dev->net, "Error writing WUCSR\n");
2073                         goto done;
2074                 }
2075         }
2076
2077         /* enable receiver to enable frame reception */
2078         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2079         if (ret < 0) {
2080                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2081                 goto done;
2082         }
2083
2084         val |= MAC_RX_RXEN;
2085
2086         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2087         if (ret < 0) {
2088                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2089                 goto done;
2090         }
2091
2092         /* some wol options are enabled, so enter SUSPEND0 */
2093         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2094         ret = smsc75xx_enter_suspend0(dev);
2095
2096 done:
2097         /*
2098          * TODO: resume() might need to handle the suspend failure
2099          * in system sleep
2100          */
2101         if (ret && PMSG_IS_AUTO(message))
2102                 usbnet_resume(intf);
2103         return ret;
2104 }
2105
2106 static int smsc75xx_resume(struct usb_interface *intf)
2107 {
2108         struct usbnet *dev = usb_get_intfdata(intf);
2109         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2110         u8 suspend_flags = pdata->suspend_flags;
2111         int ret;
2112         u32 val;
2113
2114         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2115
2116         /* do this first to ensure it's cleared even in error case */
2117         pdata->suspend_flags = 0;
2118
2119         if (suspend_flags & SUSPEND_ALLMODES) {
2120                 /* Disable wakeup sources */
2121                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2122                 if (ret < 0) {
2123                         netdev_warn(dev->net, "Error reading WUCSR\n");
2124                         return ret;
2125                 }
2126
2127                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2128                         | WUCSR_BCST_EN);
2129
2130                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2131                 if (ret < 0) {
2132                         netdev_warn(dev->net, "Error writing WUCSR\n");
2133                         return ret;
2134                 }
2135
2136                 /* clear wake-up status */
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_WOL_EN;
2144                 val |= PMT_CTL_WUPS;
2145
2146                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2147                 if (ret < 0) {
2148                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2149                         return ret;
2150                 }
2151         }
2152
2153         if (suspend_flags & SUSPEND_SUSPEND2) {
2154                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2155
2156                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2157                 if (ret < 0) {
2158                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2159                         return ret;
2160                 }
2161
2162                 val |= PMT_CTL_PHY_PWRUP;
2163
2164                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2165                 if (ret < 0) {
2166                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2167                         return ret;
2168                 }
2169         }
2170
2171         ret = smsc75xx_wait_ready(dev, 1);
2172         if (ret < 0) {
2173                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2174                 return ret;
2175         }
2176
2177         return usbnet_resume(intf);
2178 }
2179
2180 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2181                                      u32 rx_cmd_a, u32 rx_cmd_b)
2182 {
2183         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2184             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2185                 skb->ip_summed = CHECKSUM_NONE;
2186         } else {
2187                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2188                 skb->ip_summed = CHECKSUM_COMPLETE;
2189         }
2190 }
2191
2192 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2193 {
2194         /* This check is no longer done by usbnet */
2195         if (skb->len < dev->net->hard_header_len)
2196                 return 0;
2197
2198         while (skb->len > 0) {
2199                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2200                 struct sk_buff *ax_skb;
2201                 unsigned char *packet;
2202
2203                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2204                 le32_to_cpus(&rx_cmd_a);
2205                 skb_pull(skb, 4);
2206
2207                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2208                 le32_to_cpus(&rx_cmd_b);
2209                 skb_pull(skb, 4 + RXW_PADDING);
2210
2211                 packet = skb->data;
2212
2213                 /* get the packet length */
2214                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2215                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2216
2217                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2218                         netif_dbg(dev, rx_err, dev->net,
2219                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2220                         dev->net->stats.rx_errors++;
2221                         dev->net->stats.rx_dropped++;
2222
2223                         if (rx_cmd_a & RX_CMD_A_FCS)
2224                                 dev->net->stats.rx_crc_errors++;
2225                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2226                                 dev->net->stats.rx_frame_errors++;
2227                 } else {
2228                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2229                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2230                                 netif_dbg(dev, rx_err, dev->net,
2231                                           "size err rx_cmd_a=0x%08x\n",
2232                                           rx_cmd_a);
2233                                 return 0;
2234                         }
2235
2236                         /* last frame in this batch */
2237                         if (skb->len == size) {
2238                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2239                                         rx_cmd_b);
2240
2241                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2242                                 skb->truesize = size + sizeof(struct sk_buff);
2243
2244                                 return 1;
2245                         }
2246
2247                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2248                         if (unlikely(!ax_skb)) {
2249                                 netdev_warn(dev->net, "Error allocating skb\n");
2250                                 return 0;
2251                         }
2252
2253                         ax_skb->len = size;
2254                         ax_skb->data = packet;
2255                         skb_set_tail_pointer(ax_skb, size);
2256
2257                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2258                                 rx_cmd_b);
2259
2260                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2261                         ax_skb->truesize = size + sizeof(struct sk_buff);
2262
2263                         usbnet_skb_return(dev, ax_skb);
2264                 }
2265
2266                 skb_pull(skb, size);
2267
2268                 /* padding bytes before the next frame starts */
2269                 if (skb->len)
2270                         skb_pull(skb, align_count);
2271         }
2272
2273         return 1;
2274 }
2275
2276 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2277                                          struct sk_buff *skb, gfp_t flags)
2278 {
2279         u32 tx_cmd_a, tx_cmd_b;
2280
2281         if (skb_cow_head(skb, SMSC75XX_TX_OVERHEAD)) {
2282                 dev_kfree_skb_any(skb);
2283                 return NULL;
2284         }
2285
2286         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2287
2288         if (skb->ip_summed == CHECKSUM_PARTIAL)
2289                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2290
2291         if (skb_is_gso(skb)) {
2292                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2293                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2294
2295                 tx_cmd_a |= TX_CMD_A_LSO;
2296         } else {
2297                 tx_cmd_b = 0;
2298         }
2299
2300         skb_push(skb, 4);
2301         cpu_to_le32s(&tx_cmd_b);
2302         memcpy(skb->data, &tx_cmd_b, 4);
2303
2304         skb_push(skb, 4);
2305         cpu_to_le32s(&tx_cmd_a);
2306         memcpy(skb->data, &tx_cmd_a, 4);
2307
2308         return skb;
2309 }
2310
2311 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2312 {
2313         dev->intf->needs_remote_wakeup = on;
2314         return 0;
2315 }
2316
2317 static const struct driver_info smsc75xx_info = {
2318         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2319         .bind           = smsc75xx_bind,
2320         .unbind         = smsc75xx_unbind,
2321         .link_reset     = smsc75xx_link_reset,
2322         .reset          = smsc75xx_reset,
2323         .rx_fixup       = smsc75xx_rx_fixup,
2324         .tx_fixup       = smsc75xx_tx_fixup,
2325         .status         = smsc75xx_status,
2326         .manage_power   = smsc75xx_manage_power,
2327         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2328 };
2329
2330 static const struct usb_device_id products[] = {
2331         {
2332                 /* SMSC7500 USB Gigabit Ethernet Device */
2333                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2334                 .driver_info = (unsigned long) &smsc75xx_info,
2335         },
2336         {
2337                 /* SMSC7500 USB Gigabit Ethernet Device */
2338                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2339                 .driver_info = (unsigned long) &smsc75xx_info,
2340         },
2341         { },            /* END */
2342 };
2343 MODULE_DEVICE_TABLE(usb, products);
2344
2345 static struct usb_driver smsc75xx_driver = {
2346         .name           = SMSC_CHIPNAME,
2347         .id_table       = products,
2348         .probe          = usbnet_probe,
2349         .suspend        = smsc75xx_suspend,
2350         .resume         = smsc75xx_resume,
2351         .reset_resume   = smsc75xx_resume,
2352         .disconnect     = usbnet_disconnect,
2353         .disable_hub_initiated_lpm = 1,
2354         .supports_autosuspend = 1,
2355 };
2356
2357 module_usb_driver(smsc75xx_driver);
2358
2359 MODULE_AUTHOR("Nancy Lin");
2360 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2361 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2362 MODULE_LICENSE("GPL");