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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18  *
  19  *****************************************************************************/
  20
  21 #include <linux/module.h>
  22 #include <linux/kmod.h>
  23 #include <linux/init.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/etherdevice.h>
  26 #include <linux/ethtool.h>
  27 #include <linux/mii.h>
  28 #include <linux/usb.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include "smsc75xx.h"
  33
  34 #define SMSC_CHIPNAME                   "smsc75xx"
  35 #define SMSC_DRIVER_VERSION             "1.0.0"
  36 #define HS_USB_PKT_SIZE                 (512)
  37 #define FS_USB_PKT_SIZE                 (64)
  38 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  39 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  40 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  41 #define MAX_SINGLE_PACKET_SIZE          (9000)
  42 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  43 #define EEPROM_MAC_OFFSET               (0x01)
  44 #define DEFAULT_TX_CSUM_ENABLE          (true)
  45 #define DEFAULT_RX_CSUM_ENABLE          (true)
  46 #define DEFAULT_TSO_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_MAGIC)
  56
  57 #define check_warn(ret, fmt, args...) \
  58         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  59
  60 #define check_warn_return(ret, fmt, args...) \
  61         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  62
  63 #define check_warn_goto_done(ret, fmt, args...) \
  64         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  65
  66 struct smsc75xx_priv {
  67         struct usbnet *dev;
  68         u32 rfe_ctl;
  69         u32 wolopts;
  70         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  71         struct mutex dataport_mutex;
  72         spinlock_t rfe_ctl_lock;
  73         struct work_struct set_multicast;
  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 __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
  86                                           u32 *data)
  87 {
  88         u32 *buf = kmalloc(4, GFP_KERNEL);
  89         int ret;
  90
  91         BUG_ON(!dev);
  92
  93         if (!buf)
  94                 return -ENOMEM;
  95
  96         ret = usb_control_msg(dev->udev, usb_rcvctrlpipe(dev->udev, 0),
  97                 USB_VENDOR_REQUEST_READ_REGISTER,
  98                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
  99                 00, index, buf, 4, USB_CTRL_GET_TIMEOUT);
 100
 101         if (unlikely(ret < 0))
 102                 netdev_warn(dev->net,
 103                         "Failed to read reg index 0x%08x: %d", index, ret);
 104
 105         le32_to_cpus(buf);
 106         *data = *buf;
 107         kfree(buf);
 108
 109         return ret;
 110 }
 111
 112 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 113                                            u32 data)
 114 {
 115         u32 *buf = kmalloc(4, GFP_KERNEL);
 116         int ret;
 117
 118         BUG_ON(!dev);
 119
 120         if (!buf)
 121                 return -ENOMEM;
 122
 123         *buf = data;
 124         cpu_to_le32s(buf);
 125
 126         ret = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 127                 USB_VENDOR_REQUEST_WRITE_REGISTER,
 128                 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 129                 00, index, buf, 4, USB_CTRL_SET_TIMEOUT);
 130
 131         if (unlikely(ret < 0))
 132                 netdev_warn(dev->net,
 133                         "Failed to write reg index 0x%08x: %d", index, ret);
 134
 135         kfree(buf);
 136
 137         return ret;
 138 }
 139
 140 static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
 141 {
 142         if (WARN_ON_ONCE(!dev))
 143                 return -EINVAL;
 144
 145         cpu_to_le32s(&feature);
 146
 147         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 148                 USB_REQ_SET_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 149                 USB_CTRL_SET_TIMEOUT);
 150 }
 151
 152 static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
 153 {
 154         if (WARN_ON_ONCE(!dev))
 155                 return -EINVAL;
 156
 157         cpu_to_le32s(&feature);
 158
 159         return usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, 0),
 160                 USB_REQ_CLEAR_FEATURE, USB_RECIP_DEVICE, feature, 0, NULL, 0,
 161                 USB_CTRL_SET_TIMEOUT);
 162 }
 163
 164 /* Loop until the read is completed with timeout
 165  * called with phy_mutex held */
 166 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
 167 {
 168         unsigned long start_time = jiffies;
 169         u32 val;
 170         int ret;
 171
 172         do {
 173                 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
 174                 check_warn_return(ret, "Error reading MII_ACCESS");
 175
 176                 if (!(val & MII_ACCESS_BUSY))
 177                         return 0;
 178         } while (!time_after(jiffies, start_time + HZ));
 179
 180         return -EIO;
 181 }
 182
 183 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 184 {
 185         struct usbnet *dev = netdev_priv(netdev);
 186         u32 val, addr;
 187         int ret;
 188
 189         mutex_lock(&dev->phy_mutex);
 190
 191         /* confirm MII not busy */
 192         ret = smsc75xx_phy_wait_not_busy(dev);
 193         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
 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);
 202         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 203
 204         ret = smsc75xx_phy_wait_not_busy(dev);
 205         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 206
 207         ret = smsc75xx_read_reg(dev, MII_DATA, &val);
 208         check_warn_goto_done(ret, "Error reading MII_DATA");
 209
 210         ret = (u16)(val & 0xFFFF);
 211
 212 done:
 213         mutex_unlock(&dev->phy_mutex);
 214         return ret;
 215 }
 216
 217 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 218                                 int regval)
 219 {
 220         struct usbnet *dev = netdev_priv(netdev);
 221         u32 val, addr;
 222         int ret;
 223
 224         mutex_lock(&dev->phy_mutex);
 225
 226         /* confirm MII not busy */
 227         ret = smsc75xx_phy_wait_not_busy(dev);
 228         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
 229
 230         val = regval;
 231         ret = smsc75xx_write_reg(dev, MII_DATA, val);
 232         check_warn_goto_done(ret, "Error writing MII_DATA");
 233
 234         /* set the address, index & direction (write to PHY) */
 235         phy_id &= dev->mii.phy_id_mask;
 236         idx &= dev->mii.reg_num_mask;
 237         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 238                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 239                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 240         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 241         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 242
 243         ret = smsc75xx_phy_wait_not_busy(dev);
 244         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 245
 246 done:
 247         mutex_unlock(&dev->phy_mutex);
 248 }
 249
 250 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 251 {
 252         unsigned long start_time = jiffies;
 253         u32 val;
 254         int ret;
 255
 256         do {
 257                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 258                 check_warn_return(ret, "Error reading E2P_CMD");
 259
 260                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 261                         break;
 262                 udelay(40);
 263         } while (!time_after(jiffies, start_time + HZ));
 264
 265         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 266                 netdev_warn(dev->net, "EEPROM read operation timeout");
 267                 return -EIO;
 268         }
 269
 270         return 0;
 271 }
 272
 273 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 274 {
 275         unsigned long start_time = jiffies;
 276         u32 val;
 277         int ret;
 278
 279         do {
 280                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 281                 check_warn_return(ret, "Error reading E2P_CMD");
 282
 283                 if (!(val & E2P_CMD_BUSY))
 284                         return 0;
 285
 286                 udelay(40);
 287         } while (!time_after(jiffies, start_time + HZ));
 288
 289         netdev_warn(dev->net, "EEPROM is busy");
 290         return -EIO;
 291 }
 292
 293 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 294                                 u8 *data)
 295 {
 296         u32 val;
 297         int i, ret;
 298
 299         BUG_ON(!dev);
 300         BUG_ON(!data);
 301
 302         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 303         if (ret)
 304                 return ret;
 305
 306         for (i = 0; i < length; i++) {
 307                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 308                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 309                 check_warn_return(ret, "Error writing E2P_CMD");
 310
 311                 ret = smsc75xx_wait_eeprom(dev);
 312                 if (ret < 0)
 313                         return ret;
 314
 315                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 316                 check_warn_return(ret, "Error reading E2P_DATA");
 317
 318                 data[i] = val & 0xFF;
 319                 offset++;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 326                                  u8 *data)
 327 {
 328         u32 val;
 329         int i, ret;
 330
 331         BUG_ON(!dev);
 332         BUG_ON(!data);
 333
 334         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 335         if (ret)
 336                 return ret;
 337
 338         /* Issue write/erase enable command */
 339         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 340         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 341         check_warn_return(ret, "Error writing E2P_CMD");
 342
 343         ret = smsc75xx_wait_eeprom(dev);
 344         if (ret < 0)
 345                 return ret;
 346
 347         for (i = 0; i < length; i++) {
 348
 349                 /* Fill data register */
 350                 val = data[i];
 351                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 352                 check_warn_return(ret, "Error writing E2P_DATA");
 353
 354                 /* Send "write" command */
 355                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 356                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 357                 check_warn_return(ret, "Error writing E2P_CMD");
 358
 359                 ret = smsc75xx_wait_eeprom(dev);
 360                 if (ret < 0)
 361                         return ret;
 362
 363                 offset++;
 364         }
 365
 366         return 0;
 367 }
 368
 369 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 370 {
 371         int i, ret;
 372
 373         for (i = 0; i < 100; i++) {
 374                 u32 dp_sel;
 375                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 376                 check_warn_return(ret, "Error reading DP_SEL");
 377
 378                 if (dp_sel & DP_SEL_DPRDY)
 379                         return 0;
 380
 381                 udelay(40);
 382         }
 383
 384         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
 385
 386         return -EIO;
 387 }
 388
 389 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 390                                    u32 length, u32 *buf)
 391 {
 392         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 393         u32 dp_sel;
 394         int i, ret;
 395
 396         mutex_lock(&pdata->dataport_mutex);
 397
 398         ret = smsc75xx_dataport_wait_not_busy(dev);
 399         check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
 400
 401         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 402         check_warn_goto_done(ret, "Error reading DP_SEL");
 403
 404         dp_sel &= ~DP_SEL_RSEL;
 405         dp_sel |= ram_select;
 406         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 407         check_warn_goto_done(ret, "Error writing DP_SEL");
 408
 409         for (i = 0; i < length; i++) {
 410                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 411                 check_warn_goto_done(ret, "Error writing DP_ADDR");
 412
 413                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 414                 check_warn_goto_done(ret, "Error writing DP_DATA");
 415
 416                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 417                 check_warn_goto_done(ret, "Error writing DP_CMD");
 418
 419                 ret = smsc75xx_dataport_wait_not_busy(dev);
 420                 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
 421         }
 422
 423 done:
 424         mutex_unlock(&pdata->dataport_mutex);
 425         return ret;
 426 }
 427
 428 /* returns hash bit number for given MAC address */
 429 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 430 {
 431         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 432 }
 433
 434 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 435 {
 436         struct smsc75xx_priv *pdata =
 437                 container_of(param, struct smsc75xx_priv, set_multicast);
 438         struct usbnet *dev = pdata->dev;
 439         int ret;
 440
 441         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
 442                 pdata->rfe_ctl);
 443
 444         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 445                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 446
 447         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 448         check_warn(ret, "Error writing RFE_CRL");
 449 }
 450
 451 static void smsc75xx_set_multicast(struct net_device *netdev)
 452 {
 453         struct usbnet *dev = netdev_priv(netdev);
 454         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 455         unsigned long flags;
 456         int i;
 457
 458         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 459
 460         pdata->rfe_ctl &=
 461                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 462         pdata->rfe_ctl |= RFE_CTL_AB;
 463
 464         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 465                 pdata->multicast_hash_table[i] = 0;
 466
 467         if (dev->net->flags & IFF_PROMISC) {
 468                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
 469                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 470         } else if (dev->net->flags & IFF_ALLMULTI) {
 471                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
 472                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 473         } else if (!netdev_mc_empty(dev->net)) {
 474                 struct netdev_hw_addr *ha;
 475
 476                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
 477
 478                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 479
 480                 netdev_for_each_mc_addr(ha, netdev) {
 481                         u32 bitnum = smsc75xx_hash(ha->addr);
 482                         pdata->multicast_hash_table[bitnum / 32] |=
 483                                 (1 << (bitnum % 32));
 484                 }
 485         } else {
 486                 netif_dbg(dev, drv, dev->net, "receive own packets only");
 487                 pdata->rfe_ctl |= RFE_CTL_DPF;
 488         }
 489
 490         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 491
 492         /* defer register writes to a sleepable context */
 493         schedule_work(&pdata->set_multicast);
 494 }
 495
 496 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 497                                             u16 lcladv, u16 rmtadv)
 498 {
 499         u32 flow = 0, fct_flow = 0;
 500         int ret;
 501
 502         if (duplex == DUPLEX_FULL) {
 503                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 504
 505                 if (cap & FLOW_CTRL_TX) {
 506                         flow = (FLOW_TX_FCEN | 0xFFFF);
 507                         /* set fct_flow thresholds to 20% and 80% */
 508                         fct_flow = (8 << 8) | 32;
 509                 }
 510
 511                 if (cap & FLOW_CTRL_RX)
 512                         flow |= FLOW_RX_FCEN;
 513
 514                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
 515                         (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 516                         (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 517         } else {
 518                 netif_dbg(dev, link, dev->net, "half duplex");
 519         }
 520
 521         ret = smsc75xx_write_reg(dev, FLOW, flow);
 522         check_warn_return(ret, "Error writing FLOW");
 523
 524         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 525         check_warn_return(ret, "Error writing FCT_FLOW");
 526
 527         return 0;
 528 }
 529
 530 static int smsc75xx_link_reset(struct usbnet *dev)
 531 {
 532         struct mii_if_info *mii = &dev->mii;
 533         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 534         u16 lcladv, rmtadv;
 535         int ret;
 536
 537         /* write to clear phy interrupt status */
 538         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 539                 PHY_INT_SRC_CLEAR_ALL);
 540
 541         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 542         check_warn_return(ret, "Error writing INT_STS");
 543
 544         mii_check_media(mii, 1, 1);
 545         mii_ethtool_gset(&dev->mii, &ecmd);
 546         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 547         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 548
 549         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
 550                   " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
 551                   ecmd.duplex, lcladv, rmtadv);
 552
 553         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 554 }
 555
 556 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 557 {
 558         u32 intdata;
 559
 560         if (urb->actual_length != 4) {
 561                 netdev_warn(dev->net,
 562                         "unexpected urb length %d", urb->actual_length);
 563                 return;
 564         }
 565
 566         memcpy(&intdata, urb->transfer_buffer, 4);
 567         le32_to_cpus(&intdata);
 568
 569         netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
 570
 571         if (intdata & INT_ENP_PHY_INT)
 572                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 573         else
 574                 netdev_warn(dev->net,
 575                         "unexpected interrupt, intdata=0x%08X", intdata);
 576 }
 577
 578 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 579 {
 580         return MAX_EEPROM_SIZE;
 581 }
 582
 583 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 584                                        struct ethtool_eeprom *ee, u8 *data)
 585 {
 586         struct usbnet *dev = netdev_priv(netdev);
 587
 588         ee->magic = LAN75XX_EEPROM_MAGIC;
 589
 590         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 591 }
 592
 593 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 594                                        struct ethtool_eeprom *ee, u8 *data)
 595 {
 596         struct usbnet *dev = netdev_priv(netdev);
 597
 598         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 599                 netdev_warn(dev->net,
 600                         "EEPROM: magic value mismatch: 0x%x", ee->magic);
 601                 return -EINVAL;
 602         }
 603
 604         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 605 }
 606
 607 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 608                                      struct ethtool_wolinfo *wolinfo)
 609 {
 610         struct usbnet *dev = netdev_priv(net);
 611         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 612
 613         wolinfo->supported = SUPPORTED_WAKE;
 614         wolinfo->wolopts = pdata->wolopts;
 615 }
 616
 617 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 618                                     struct ethtool_wolinfo *wolinfo)
 619 {
 620         struct usbnet *dev = netdev_priv(net);
 621         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 622
 623         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 624         return 0;
 625 }
 626
 627 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 628         .get_link       = usbnet_get_link,
 629         .nway_reset     = usbnet_nway_reset,
 630         .get_drvinfo    = usbnet_get_drvinfo,
 631         .get_msglevel   = usbnet_get_msglevel,
 632         .set_msglevel   = usbnet_set_msglevel,
 633         .get_settings   = usbnet_get_settings,
 634         .set_settings   = usbnet_set_settings,
 635         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 636         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 637         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 638         .get_wol        = smsc75xx_ethtool_get_wol,
 639         .set_wol        = smsc75xx_ethtool_set_wol,
 640 };
 641
 642 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 643 {
 644         struct usbnet *dev = netdev_priv(netdev);
 645
 646         if (!netif_running(netdev))
 647                 return -EINVAL;
 648
 649         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 650 }
 651
 652 static void smsc75xx_init_mac_address(struct usbnet *dev)
 653 {
 654         /* try reading mac address from EEPROM */
 655         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 656                         dev->net->dev_addr) == 0) {
 657                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 658                         /* eeprom values are valid so use them */
 659                         netif_dbg(dev, ifup, dev->net,
 660                                 "MAC address read from EEPROM");
 661                         return;
 662                 }
 663         }
 664
 665         /* no eeprom, or eeprom values are invalid. generate random MAC */
 666         eth_hw_addr_random(dev->net);
 667         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr");
 668 }
 669
 670 static int smsc75xx_set_mac_address(struct usbnet *dev)
 671 {
 672         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 673                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 674         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 675
 676         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 677         check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
 678
 679         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 680         check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
 681
 682         addr_hi |= ADDR_FILTX_FB_VALID;
 683         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 684         check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
 685
 686         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 687         check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
 688
 689         return 0;
 690 }
 691
 692 static int smsc75xx_phy_initialize(struct usbnet *dev)
 693 {
 694         int bmcr, ret, timeout = 0;
 695
 696         /* Initialize MII structure */
 697         dev->mii.dev = dev->net;
 698         dev->mii.mdio_read = smsc75xx_mdio_read;
 699         dev->mii.mdio_write = smsc75xx_mdio_write;
 700         dev->mii.phy_id_mask = 0x1f;
 701         dev->mii.reg_num_mask = 0x1f;
 702         dev->mii.supports_gmii = 1;
 703         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 704
 705         /* reset phy and wait for reset to complete */
 706         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 707
 708         do {
 709                 msleep(10);
 710                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 711                 check_warn_return(bmcr, "Error reading MII_BMCR");
 712                 timeout++;
 713         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 714
 715         if (timeout >= 100) {
 716                 netdev_warn(dev->net, "timeout on PHY Reset");
 717                 return -EIO;
 718         }
 719
 720         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 721                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 722                 ADVERTISE_PAUSE_ASYM);
 723         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 724                 ADVERTISE_1000FULL);
 725
 726         /* read and write to clear phy interrupt status */
 727         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 728         check_warn_return(ret, "Error reading PHY_INT_SRC");
 729         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 730
 731         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 732                 PHY_INT_MASK_DEFAULT);
 733         mii_nway_restart(&dev->mii);
 734
 735         netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 736         return 0;
 737 }
 738
 739 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 740 {
 741         int ret = 0;
 742         u32 buf;
 743         bool rxenabled;
 744
 745         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 746         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
 747
 748         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 749
 750         if (rxenabled) {
 751                 buf &= ~MAC_RX_RXEN;
 752                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 753                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 754         }
 755
 756         /* add 4 to size for FCS */
 757         buf &= ~MAC_RX_MAX_SIZE;
 758         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 759
 760         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 761         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 762
 763         if (rxenabled) {
 764                 buf |= MAC_RX_RXEN;
 765                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 766                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 767         }
 768
 769         return 0;
 770 }
 771
 772 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 773 {
 774         struct usbnet *dev = netdev_priv(netdev);
 775
 776         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 777         check_warn_return(ret, "Failed to set mac rx frame length");
 778
 779         return usbnet_change_mtu(netdev, new_mtu);
 780 }
 781
 782 /* Enable or disable Rx checksum offload engine */
 783 static int smsc75xx_set_features(struct net_device *netdev,
 784         netdev_features_t features)
 785 {
 786         struct usbnet *dev = netdev_priv(netdev);
 787         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 788         unsigned long flags;
 789         int ret;
 790
 791         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 792
 793         if (features & NETIF_F_RXCSUM)
 794                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 795         else
 796                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 797
 798         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 799         /* it's racing here! */
 800
 801         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 802         check_warn_return(ret, "Error writing RFE_CTL");
 803
 804         return 0;
 805 }
 806
 807 static int smsc75xx_wait_ready(struct usbnet *dev)
 808 {
 809         int timeout = 0;
 810
 811         do {
 812                 u32 buf;
 813                 int ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 814                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 815
 816                 if (buf & PMT_CTL_DEV_RDY)
 817                         return 0;
 818
 819                 msleep(10);
 820                 timeout++;
 821         } while (timeout < 100);
 822
 823         netdev_warn(dev->net, "timeout waiting for device ready");
 824         return -EIO;
 825 }
 826
 827 static int smsc75xx_reset(struct usbnet *dev)
 828 {
 829         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 830         u32 buf;
 831         int ret = 0, timeout;
 832
 833         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
 834
 835         ret = smsc75xx_wait_ready(dev);
 836         check_warn_return(ret, "device not ready in smsc75xx_reset");
 837
 838         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 839         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 840
 841         buf |= HW_CFG_LRST;
 842
 843         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 844         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 845
 846         timeout = 0;
 847         do {
 848                 msleep(10);
 849                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 850                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 851                 timeout++;
 852         } while ((buf & HW_CFG_LRST) && (timeout < 100));
 853
 854         if (timeout >= 100) {
 855                 netdev_warn(dev->net, "timeout on completion of Lite Reset");
 856                 return -EIO;
 857         }
 858
 859         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
 860
 861         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 862         check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 863
 864         buf |= PMT_CTL_PHY_RST;
 865
 866         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
 867         check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
 868
 869         timeout = 0;
 870         do {
 871                 msleep(10);
 872                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 873                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 874                 timeout++;
 875         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
 876
 877         if (timeout >= 100) {
 878                 netdev_warn(dev->net, "timeout waiting for PHY Reset");
 879                 return -EIO;
 880         }
 881
 882         netif_dbg(dev, ifup, dev->net, "PHY reset complete");
 883
 884         smsc75xx_init_mac_address(dev);
 885
 886         ret = smsc75xx_set_mac_address(dev);
 887         check_warn_return(ret, "Failed to set mac address");
 888
 889         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
 890
 891         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 892         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 893
 894         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
 895
 896         buf |= HW_CFG_BIR;
 897
 898         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 899         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 900
 901         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 902         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 903
 904         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
 905                         "writing HW_CFG_BIR: 0x%08x", buf);
 906
 907         if (!turbo_mode) {
 908                 buf = 0;
 909                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 910         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 911                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 912                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 913         } else {
 914                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 915                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 916         }
 917
 918         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
 919                 (ulong)dev->rx_urb_size);
 920
 921         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
 922         check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
 923
 924         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
 925         check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
 926
 927         netif_dbg(dev, ifup, dev->net,
 928                 "Read Value from BURST_CAP after writing: 0x%08x", buf);
 929
 930         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 931         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
 932
 933         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
 934         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
 935
 936         netif_dbg(dev, ifup, dev->net,
 937                 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
 938
 939         if (turbo_mode) {
 940                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 941                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 942
 943                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 944
 945                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
 946
 947                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 948                 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 949
 950                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 951                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 952
 953                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 954         }
 955
 956         /* set FIFO sizes */
 957         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
 958         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
 959         check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
 960
 961         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
 962
 963         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
 964         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
 965         check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
 966
 967         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
 968
 969         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 970         check_warn_return(ret, "Failed to write INT_STS: %d", ret);
 971
 972         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
 973         check_warn_return(ret, "Failed to read ID_REV: %d", ret);
 974
 975         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
 976
 977         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
 978         check_warn_return(ret, "Failed to read E2P_CMD: %d", ret);
 979
 980         /* only set default GPIO/LED settings if no EEPROM is detected */
 981         if (!(buf & E2P_CMD_LOADED)) {
 982                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
 983                 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
 984
 985                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
 986                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
 987
 988                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
 989                 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
 990         }
 991
 992         ret = smsc75xx_write_reg(dev, FLOW, 0);
 993         check_warn_return(ret, "Failed to write FLOW: %d", ret);
 994
 995         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
 996         check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
 997
 998         /* Don't need rfe_ctl_lock during initialisation */
 999         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1000         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1001
1002         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1003
1004         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1005         check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
1006
1007         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1008         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1009
1010         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
1011
1012         /* Enable or disable checksum offload engines */
1013         smsc75xx_set_features(dev->net, dev->net->features);
1014
1015         smsc75xx_set_multicast(dev->net);
1016
1017         ret = smsc75xx_phy_initialize(dev);
1018         check_warn_return(ret, "Failed to initialize PHY: %d", ret);
1019
1020         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1021         check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
1022
1023         /* enable PHY interrupts */
1024         buf |= INT_ENP_PHY_INT;
1025
1026         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1027         check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
1028
1029         /* allow mac to detect speed and duplex from phy */
1030         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1031         check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
1032
1033         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1034         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1035         check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
1036
1037         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1038         check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
1039
1040         buf |= MAC_TX_TXEN;
1041
1042         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1043         check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
1044
1045         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
1046
1047         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1048         check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
1049
1050         buf |= FCT_TX_CTL_EN;
1051
1052         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1053         check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1054
1055         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1056
1057         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1058         check_warn_return(ret, "Failed to set max rx frame length");
1059
1060         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1061         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1062
1063         buf |= MAC_RX_RXEN;
1064
1065         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1066         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1067
1068         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1069
1070         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1071         check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1072
1073         buf |= FCT_RX_CTL_EN;
1074
1075         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1076         check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1077
1078         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1079
1080         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1081         return 0;
1082 }
1083
1084 static const struct net_device_ops smsc75xx_netdev_ops = {
1085         .ndo_open               = usbnet_open,
1086         .ndo_stop               = usbnet_stop,
1087         .ndo_start_xmit         = usbnet_start_xmit,
1088         .ndo_tx_timeout         = usbnet_tx_timeout,
1089         .ndo_change_mtu         = smsc75xx_change_mtu,
1090         .ndo_set_mac_address    = eth_mac_addr,
1091         .ndo_validate_addr      = eth_validate_addr,
1092         .ndo_do_ioctl           = smsc75xx_ioctl,
1093         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1094         .ndo_set_features       = smsc75xx_set_features,
1095 };
1096
1097 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1098 {
1099         struct smsc75xx_priv *pdata = NULL;
1100         int ret;
1101
1102         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1103
1104         ret = usbnet_get_endpoints(dev, intf);
1105         check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1106
1107         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1108                 GFP_KERNEL);
1109
1110         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1111         if (!pdata) {
1112                 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1113                 return -ENOMEM;
1114         }
1115
1116         pdata->dev = dev;
1117
1118         spin_lock_init(&pdata->rfe_ctl_lock);
1119         mutex_init(&pdata->dataport_mutex);
1120
1121         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1122
1123         if (DEFAULT_TX_CSUM_ENABLE) {
1124                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1125                 if (DEFAULT_TSO_ENABLE)
1126                         dev->net->features |= NETIF_F_SG |
1127                                 NETIF_F_TSO | NETIF_F_TSO6;
1128         }
1129         if (DEFAULT_RX_CSUM_ENABLE)
1130                 dev->net->features |= NETIF_F_RXCSUM;
1131
1132         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1133                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1134
1135         /* Init all registers */
1136         ret = smsc75xx_reset(dev);
1137
1138         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1139         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1140         dev->net->flags |= IFF_MULTICAST;
1141         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1142         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1143         return 0;
1144 }
1145
1146 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1147 {
1148         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1149         if (pdata) {
1150                 netif_dbg(dev, ifdown, dev->net, "free pdata");
1151                 kfree(pdata);
1152                 pdata = NULL;
1153                 dev->data[0] = 0;
1154         }
1155 }
1156
1157 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1158 {
1159         struct usbnet *dev = usb_get_intfdata(intf);
1160         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1161         int ret;
1162         u32 val;
1163
1164         ret = usbnet_suspend(intf, message);
1165         check_warn_return(ret, "usbnet_suspend error");
1166
1167         /* if no wol options set, enter lowest power SUSPEND2 mode */
1168         if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1169                 netdev_info(dev->net, "entering SUSPEND2 mode");
1170
1171                 /* disable energy detect (link up) & wake up events */
1172                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1173                 check_warn_return(ret, "Error reading WUCSR");
1174
1175                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1176
1177                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1178                 check_warn_return(ret, "Error writing WUCSR");
1179
1180                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1181                 check_warn_return(ret, "Error reading PMT_CTL");
1182
1183                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1184
1185                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1186                 check_warn_return(ret, "Error writing PMT_CTL");
1187
1188                 /* enter suspend2 mode */
1189                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1190                 check_warn_return(ret, "Error reading PMT_CTL");
1191
1192                 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1193                 val |= PMT_CTL_SUS_MODE_2;
1194
1195                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1196                 check_warn_return(ret, "Error writing PMT_CTL");
1197
1198                 return 0;
1199         }
1200
1201         if (pdata->wolopts & WAKE_MAGIC) {
1202                 /* clear any pending magic packet status */
1203                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1204                 check_warn_return(ret, "Error reading WUCSR");
1205
1206                 val |= WUCSR_MPR;
1207
1208                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1209                 check_warn_return(ret, "Error writing WUCSR");
1210         }
1211
1212         /* enable/disable magic packup wake */
1213         ret = smsc75xx_read_reg(dev, WUCSR, &val);
1214         check_warn_return(ret, "Error reading WUCSR");
1215
1216         if (pdata->wolopts & WAKE_MAGIC) {
1217                 netdev_info(dev->net, "enabling magic packet wakeup");
1218                 val |= WUCSR_MPEN;
1219         } else {
1220                 netdev_info(dev->net, "disabling magic packet wakeup");
1221                 val &= ~WUCSR_MPEN;
1222         }
1223
1224         ret = smsc75xx_write_reg(dev, WUCSR, val);
1225         check_warn_return(ret, "Error writing WUCSR");
1226
1227         /* enable wol wakeup source */
1228         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1229         check_warn_return(ret, "Error reading PMT_CTL");
1230
1231         val |= PMT_CTL_WOL_EN;
1232
1233         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1234         check_warn_return(ret, "Error writing PMT_CTL");
1235
1236         /* enable receiver */
1237         ret = smsc75xx_read_reg(dev, MAC_RX, &val);
1238         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1239
1240         val |= MAC_RX_RXEN;
1241
1242         ret = smsc75xx_write_reg(dev, MAC_RX, val);
1243         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1244
1245         /* some wol options are enabled, so enter SUSPEND0 */
1246         netdev_info(dev->net, "entering SUSPEND0 mode");
1247
1248         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1249         check_warn_return(ret, "Error reading PMT_CTL");
1250
1251         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST));
1252         val |= PMT_CTL_SUS_MODE_0;
1253
1254         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1255         check_warn_return(ret, "Error writing PMT_CTL");
1256
1257         /* clear wol status */
1258         val &= ~PMT_CTL_WUPS;
1259         val |= PMT_CTL_WUPS_WOL;
1260         ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1261         check_warn_return(ret, "Error writing PMT_CTL");
1262
1263         /* read back PMT_CTL */
1264         ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1265         check_warn_return(ret, "Error reading PMT_CTL");
1266
1267         smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1268
1269         return 0;
1270 }
1271
1272 static int smsc75xx_resume(struct usb_interface *intf)
1273 {
1274         struct usbnet *dev = usb_get_intfdata(intf);
1275         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1276         int ret;
1277         u32 val;
1278
1279         if (pdata->wolopts & WAKE_MAGIC) {
1280                 netdev_info(dev->net, "resuming from SUSPEND0");
1281
1282                 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1283
1284                 /* Disable magic packup wake */
1285                 ret = smsc75xx_read_reg(dev, WUCSR, &val);
1286                 check_warn_return(ret, "Error reading WUCSR");
1287
1288                 val &= ~WUCSR_MPEN;
1289
1290                 ret = smsc75xx_write_reg(dev, WUCSR, val);
1291                 check_warn_return(ret, "Error writing WUCSR");
1292
1293                 /* clear wake-up status */
1294                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1295                 check_warn_return(ret, "Error reading PMT_CTL");
1296
1297                 val &= ~PMT_CTL_WOL_EN;
1298                 val |= PMT_CTL_WUPS;
1299
1300                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1301                 check_warn_return(ret, "Error writing PMT_CTL");
1302         } else {
1303                 netdev_info(dev->net, "resuming from SUSPEND2");
1304
1305                 ret = smsc75xx_read_reg(dev, PMT_CTL, &val);
1306                 check_warn_return(ret, "Error reading PMT_CTL");
1307
1308                 val |= PMT_CTL_PHY_PWRUP;
1309
1310                 ret = smsc75xx_write_reg(dev, PMT_CTL, val);
1311                 check_warn_return(ret, "Error writing PMT_CTL");
1312         }
1313
1314         ret = smsc75xx_wait_ready(dev);
1315         check_warn_return(ret, "device not ready in smsc75xx_resume");
1316
1317         return usbnet_resume(intf);
1318 }
1319
1320 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1321                                      u32 rx_cmd_a, u32 rx_cmd_b)
1322 {
1323         if (!(dev->net->features & NETIF_F_RXCSUM) ||
1324             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1325                 skb->ip_summed = CHECKSUM_NONE;
1326         } else {
1327                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1328                 skb->ip_summed = CHECKSUM_COMPLETE;
1329         }
1330 }
1331
1332 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1333 {
1334         while (skb->len > 0) {
1335                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1336                 struct sk_buff *ax_skb;
1337                 unsigned char *packet;
1338
1339                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1340                 le32_to_cpus(&rx_cmd_a);
1341                 skb_pull(skb, 4);
1342
1343                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1344                 le32_to_cpus(&rx_cmd_b);
1345                 skb_pull(skb, 4 + RXW_PADDING);
1346
1347                 packet = skb->data;
1348
1349                 /* get the packet length */
1350                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1351                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1352
1353                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1354                         netif_dbg(dev, rx_err, dev->net,
1355                                 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1356                         dev->net->stats.rx_errors++;
1357                         dev->net->stats.rx_dropped++;
1358
1359                         if (rx_cmd_a & RX_CMD_A_FCS)
1360                                 dev->net->stats.rx_crc_errors++;
1361                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1362                                 dev->net->stats.rx_frame_errors++;
1363                 } else {
1364                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1365                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1366                                 netif_dbg(dev, rx_err, dev->net,
1367                                         "size err rx_cmd_a=0x%08x", rx_cmd_a);
1368                                 return 0;
1369                         }
1370
1371                         /* last frame in this batch */
1372                         if (skb->len == size) {
1373                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1374                                         rx_cmd_b);
1375
1376                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1377                                 skb->truesize = size + sizeof(struct sk_buff);
1378
1379                                 return 1;
1380                         }
1381
1382                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1383                         if (unlikely(!ax_skb)) {
1384                                 netdev_warn(dev->net, "Error allocating skb");
1385                                 return 0;
1386                         }
1387
1388                         ax_skb->len = size;
1389                         ax_skb->data = packet;
1390                         skb_set_tail_pointer(ax_skb, size);
1391
1392                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1393                                 rx_cmd_b);
1394
1395                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1396                         ax_skb->truesize = size + sizeof(struct sk_buff);
1397
1398                         usbnet_skb_return(dev, ax_skb);
1399                 }
1400
1401                 skb_pull(skb, size);
1402
1403                 /* padding bytes before the next frame starts */
1404                 if (skb->len)
1405                         skb_pull(skb, align_count);
1406         }
1407
1408         if (unlikely(skb->len < 0)) {
1409                 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1410                 return 0;
1411         }
1412
1413         return 1;
1414 }
1415
1416 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1417                                          struct sk_buff *skb, gfp_t flags)
1418 {
1419         u32 tx_cmd_a, tx_cmd_b;
1420
1421         skb_linearize(skb);
1422
1423         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1424                 struct sk_buff *skb2 =
1425                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1426                 dev_kfree_skb_any(skb);
1427                 skb = skb2;
1428                 if (!skb)
1429                         return NULL;
1430         }
1431
1432         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1433
1434         if (skb->ip_summed == CHECKSUM_PARTIAL)
1435                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1436
1437         if (skb_is_gso(skb)) {
1438                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1439                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1440
1441                 tx_cmd_a |= TX_CMD_A_LSO;
1442         } else {
1443                 tx_cmd_b = 0;
1444         }
1445
1446         skb_push(skb, 4);
1447         cpu_to_le32s(&tx_cmd_b);
1448         memcpy(skb->data, &tx_cmd_b, 4);
1449
1450         skb_push(skb, 4);
1451         cpu_to_le32s(&tx_cmd_a);
1452         memcpy(skb->data, &tx_cmd_a, 4);
1453
1454         return skb;
1455 }
1456
1457 static const struct driver_info smsc75xx_info = {
1458         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
1459         .bind           = smsc75xx_bind,
1460         .unbind         = smsc75xx_unbind,
1461         .link_reset     = smsc75xx_link_reset,
1462         .reset          = smsc75xx_reset,
1463         .rx_fixup       = smsc75xx_rx_fixup,
1464         .tx_fixup       = smsc75xx_tx_fixup,
1465         .status         = smsc75xx_status,
1466         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1467 };
1468
1469 static const struct usb_device_id products[] = {
1470         {
1471                 /* SMSC7500 USB Gigabit Ethernet Device */
1472                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1473                 .driver_info = (unsigned long) &smsc75xx_info,
1474         },
1475         {
1476                 /* SMSC7500 USB Gigabit Ethernet Device */
1477                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1478                 .driver_info = (unsigned long) &smsc75xx_info,
1479         },
1480         { },            /* END */
1481 };
1482 MODULE_DEVICE_TABLE(usb, products);
1483
1484 static struct usb_driver smsc75xx_driver = {
1485         .name           = SMSC_CHIPNAME,
1486         .id_table       = products,
1487         .probe          = usbnet_probe,
1488         .suspend        = smsc75xx_suspend,
1489         .resume         = smsc75xx_resume,
1490         .reset_resume   = smsc75xx_resume,
1491         .disconnect     = usbnet_disconnect,
1492         .disable_hub_initiated_lpm = 1,
1493 };
1494
1495 module_usb_driver(smsc75xx_driver);
1496
1497 MODULE_AUTHOR("Nancy Lin");
1498 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1499 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1500 MODULE_LICENSE("GPL");