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/bitrev.h>
  30 #include <linux/crc16.h>
  31 #include <linux/crc32.h>
  32 #include <linux/usb/usbnet.h>
  33 #include <linux/slab.h>
  34 #include "smsc75xx.h"
  35
  36 #define SMSC_CHIPNAME                   "smsc75xx"
  37 #define SMSC_DRIVER_VERSION             "1.0.0"
  38 #define HS_USB_PKT_SIZE                 (512)
  39 #define FS_USB_PKT_SIZE                 (64)
  40 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  41 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  42 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  43 #define MAX_SINGLE_PACKET_SIZE          (9000)
  44 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  45 #define EEPROM_MAC_OFFSET               (0x01)
  46 #define DEFAULT_TX_CSUM_ENABLE          (true)
  47 #define DEFAULT_RX_CSUM_ENABLE          (true)
  48 #define DEFAULT_TSO_ENABLE              (true)
  49 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  50 #define SMSC75XX_TX_OVERHEAD            (8)
  51 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  52 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  53 #define USB_VENDOR_ID_SMSC              (0x0424)
  54 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  55 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  56 #define RXW_PADDING                     2
  57 #define SUPPORTED_WAKE                  (WAKE_UCAST | WAKE_BCAST | \
  58                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  59
  60 #define check_warn(ret, fmt, args...) \
  61         ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); })
  62
  63 #define check_warn_return(ret, fmt, args...) \
  64         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); return ret; } })
  65
  66 #define check_warn_goto_done(ret, fmt, args...) \
  67         ({ if (ret < 0) { netdev_warn(dev->net, fmt, ##args); goto done; } })
  68
  69 struct smsc75xx_priv {
  70         struct usbnet *dev;
  71         u32 rfe_ctl;
  72         u32 wolopts;
  73         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  74         struct mutex dataport_mutex;
  75         spinlock_t rfe_ctl_lock;
  76         struct work_struct set_multicast;
  77 };
  78
  79 struct usb_context {
  80         struct usb_ctrlrequest req;
  81         struct usbnet *dev;
  82 };
  83
  84 static bool turbo_mode = true;
  85 module_param(turbo_mode, bool, 0644);
  86 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  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,
 107                         "Failed to read reg index 0x%08x: %d", index, ret);
 108
 109         le32_to_cpus(&buf);
 110         *data = buf;
 111
 112         return ret;
 113 }
 114
 115 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 116                                              u32 data, int in_pm)
 117 {
 118         u32 buf;
 119         int ret;
 120         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 121
 122         BUG_ON(!dev);
 123
 124         if (!in_pm)
 125                 fn = usbnet_write_cmd;
 126         else
 127                 fn = usbnet_write_cmd_nopm;
 128
 129         buf = data;
 130         cpu_to_le32s(&buf);
 131
 132         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 133                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 134                  0, index, &buf, 4);
 135         if (unlikely(ret < 0))
 136                 netdev_warn(dev->net,
 137                         "Failed to write reg index 0x%08x: %d", index, ret);
 138
 139         return ret;
 140 }
 141
 142 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 143                                                u32 *data)
 144 {
 145         return __smsc75xx_read_reg(dev, index, data, 1);
 146 }
 147
 148 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 149                                                 u32 data)
 150 {
 151         return __smsc75xx_write_reg(dev, index, data, 1);
 152 }
 153
 154 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 155                                           u32 *data)
 156 {
 157         return __smsc75xx_read_reg(dev, index, data, 0);
 158 }
 159
 160 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 161                                            u32 data)
 162 {
 163         return __smsc75xx_write_reg(dev, index, data, 0);
 164 }
 165
 166 static int smsc75xx_set_feature(struct usbnet *dev, u32 feature)
 167 {
 168         if (WARN_ON_ONCE(!dev))
 169                 return -EINVAL;
 170
 171         return usbnet_write_cmd_nopm(dev, USB_REQ_SET_FEATURE,
 172                                      USB_DIR_OUT | USB_RECIP_DEVICE,
 173                                      feature, 0, NULL, 0);
 174 }
 175
 176 static int smsc75xx_clear_feature(struct usbnet *dev, u32 feature)
 177 {
 178         if (WARN_ON_ONCE(!dev))
 179                 return -EINVAL;
 180
 181         return usbnet_write_cmd_nopm(dev, USB_REQ_CLEAR_FEATURE,
 182                                      USB_DIR_OUT | USB_RECIP_DEVICE,
 183                                      feature, 0, NULL, 0);
 184 }
 185
 186 /* Loop until the read is completed with timeout
 187  * called with phy_mutex held */
 188 static int smsc75xx_phy_wait_not_busy(struct usbnet *dev)
 189 {
 190         unsigned long start_time = jiffies;
 191         u32 val;
 192         int ret;
 193
 194         do {
 195                 ret = smsc75xx_read_reg(dev, MII_ACCESS, &val);
 196                 check_warn_return(ret, "Error reading MII_ACCESS");
 197
 198                 if (!(val & MII_ACCESS_BUSY))
 199                         return 0;
 200         } while (!time_after(jiffies, start_time + HZ));
 201
 202         return -EIO;
 203 }
 204
 205 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 206 {
 207         struct usbnet *dev = netdev_priv(netdev);
 208         u32 val, addr;
 209         int ret;
 210
 211         mutex_lock(&dev->phy_mutex);
 212
 213         /* confirm MII not busy */
 214         ret = smsc75xx_phy_wait_not_busy(dev);
 215         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_read");
 216
 217         /* set the address, index & direction (read from PHY) */
 218         phy_id &= dev->mii.phy_id_mask;
 219         idx &= dev->mii.reg_num_mask;
 220         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 221                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 222                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 223         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 224         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 225
 226         ret = smsc75xx_phy_wait_not_busy(dev);
 227         check_warn_goto_done(ret, "Timed out reading MII reg %02X", idx);
 228
 229         ret = smsc75xx_read_reg(dev, MII_DATA, &val);
 230         check_warn_goto_done(ret, "Error reading MII_DATA");
 231
 232         ret = (u16)(val & 0xFFFF);
 233
 234 done:
 235         mutex_unlock(&dev->phy_mutex);
 236         return ret;
 237 }
 238
 239 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 240                                 int regval)
 241 {
 242         struct usbnet *dev = netdev_priv(netdev);
 243         u32 val, addr;
 244         int ret;
 245
 246         mutex_lock(&dev->phy_mutex);
 247
 248         /* confirm MII not busy */
 249         ret = smsc75xx_phy_wait_not_busy(dev);
 250         check_warn_goto_done(ret, "MII is busy in smsc75xx_mdio_write");
 251
 252         val = regval;
 253         ret = smsc75xx_write_reg(dev, MII_DATA, val);
 254         check_warn_goto_done(ret, "Error writing MII_DATA");
 255
 256         /* set the address, index & direction (write to PHY) */
 257         phy_id &= dev->mii.phy_id_mask;
 258         idx &= dev->mii.reg_num_mask;
 259         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 260                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 261                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 262         ret = smsc75xx_write_reg(dev, MII_ACCESS, addr);
 263         check_warn_goto_done(ret, "Error writing MII_ACCESS");
 264
 265         ret = smsc75xx_phy_wait_not_busy(dev);
 266         check_warn_goto_done(ret, "Timed out writing MII reg %02X", idx);
 267
 268 done:
 269         mutex_unlock(&dev->phy_mutex);
 270 }
 271
 272 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 273 {
 274         unsigned long start_time = jiffies;
 275         u32 val;
 276         int ret;
 277
 278         do {
 279                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 280                 check_warn_return(ret, "Error reading E2P_CMD");
 281
 282                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 283                         break;
 284                 udelay(40);
 285         } while (!time_after(jiffies, start_time + HZ));
 286
 287         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 288                 netdev_warn(dev->net, "EEPROM read operation timeout");
 289                 return -EIO;
 290         }
 291
 292         return 0;
 293 }
 294
 295 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 296 {
 297         unsigned long start_time = jiffies;
 298         u32 val;
 299         int ret;
 300
 301         do {
 302                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 303                 check_warn_return(ret, "Error reading E2P_CMD");
 304
 305                 if (!(val & E2P_CMD_BUSY))
 306                         return 0;
 307
 308                 udelay(40);
 309         } while (!time_after(jiffies, start_time + HZ));
 310
 311         netdev_warn(dev->net, "EEPROM is busy");
 312         return -EIO;
 313 }
 314
 315 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 316                                 u8 *data)
 317 {
 318         u32 val;
 319         int i, ret;
 320
 321         BUG_ON(!dev);
 322         BUG_ON(!data);
 323
 324         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 325         if (ret)
 326                 return ret;
 327
 328         for (i = 0; i < length; i++) {
 329                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 330                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 331                 check_warn_return(ret, "Error writing E2P_CMD");
 332
 333                 ret = smsc75xx_wait_eeprom(dev);
 334                 if (ret < 0)
 335                         return ret;
 336
 337                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 338                 check_warn_return(ret, "Error reading E2P_DATA");
 339
 340                 data[i] = val & 0xFF;
 341                 offset++;
 342         }
 343
 344         return 0;
 345 }
 346
 347 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 348                                  u8 *data)
 349 {
 350         u32 val;
 351         int i, ret;
 352
 353         BUG_ON(!dev);
 354         BUG_ON(!data);
 355
 356         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 357         if (ret)
 358                 return ret;
 359
 360         /* Issue write/erase enable command */
 361         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 362         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 363         check_warn_return(ret, "Error writing E2P_CMD");
 364
 365         ret = smsc75xx_wait_eeprom(dev);
 366         if (ret < 0)
 367                 return ret;
 368
 369         for (i = 0; i < length; i++) {
 370
 371                 /* Fill data register */
 372                 val = data[i];
 373                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 374                 check_warn_return(ret, "Error writing E2P_DATA");
 375
 376                 /* Send "write" command */
 377                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 378                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 379                 check_warn_return(ret, "Error writing E2P_CMD");
 380
 381                 ret = smsc75xx_wait_eeprom(dev);
 382                 if (ret < 0)
 383                         return ret;
 384
 385                 offset++;
 386         }
 387
 388         return 0;
 389 }
 390
 391 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 392 {
 393         int i, ret;
 394
 395         for (i = 0; i < 100; i++) {
 396                 u32 dp_sel;
 397                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 398                 check_warn_return(ret, "Error reading DP_SEL");
 399
 400                 if (dp_sel & DP_SEL_DPRDY)
 401                         return 0;
 402
 403                 udelay(40);
 404         }
 405
 406         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out");
 407
 408         return -EIO;
 409 }
 410
 411 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 412                                    u32 length, u32 *buf)
 413 {
 414         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 415         u32 dp_sel;
 416         int i, ret;
 417
 418         mutex_lock(&pdata->dataport_mutex);
 419
 420         ret = smsc75xx_dataport_wait_not_busy(dev);
 421         check_warn_goto_done(ret, "smsc75xx_dataport_write busy on entry");
 422
 423         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 424         check_warn_goto_done(ret, "Error reading DP_SEL");
 425
 426         dp_sel &= ~DP_SEL_RSEL;
 427         dp_sel |= ram_select;
 428         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 429         check_warn_goto_done(ret, "Error writing DP_SEL");
 430
 431         for (i = 0; i < length; i++) {
 432                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 433                 check_warn_goto_done(ret, "Error writing DP_ADDR");
 434
 435                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 436                 check_warn_goto_done(ret, "Error writing DP_DATA");
 437
 438                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 439                 check_warn_goto_done(ret, "Error writing DP_CMD");
 440
 441                 ret = smsc75xx_dataport_wait_not_busy(dev);
 442                 check_warn_goto_done(ret, "smsc75xx_dataport_write timeout");
 443         }
 444
 445 done:
 446         mutex_unlock(&pdata->dataport_mutex);
 447         return ret;
 448 }
 449
 450 /* returns hash bit number for given MAC address */
 451 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 452 {
 453         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 454 }
 455
 456 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 457 {
 458         struct smsc75xx_priv *pdata =
 459                 container_of(param, struct smsc75xx_priv, set_multicast);
 460         struct usbnet *dev = pdata->dev;
 461         int ret;
 462
 463         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x",
 464                 pdata->rfe_ctl);
 465
 466         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 467                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 468
 469         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 470         check_warn(ret, "Error writing RFE_CRL");
 471 }
 472
 473 static void smsc75xx_set_multicast(struct net_device *netdev)
 474 {
 475         struct usbnet *dev = netdev_priv(netdev);
 476         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 477         unsigned long flags;
 478         int i;
 479
 480         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 481
 482         pdata->rfe_ctl &=
 483                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 484         pdata->rfe_ctl |= RFE_CTL_AB;
 485
 486         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 487                 pdata->multicast_hash_table[i] = 0;
 488
 489         if (dev->net->flags & IFF_PROMISC) {
 490                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled");
 491                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 492         } else if (dev->net->flags & IFF_ALLMULTI) {
 493                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled");
 494                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 495         } else if (!netdev_mc_empty(dev->net)) {
 496                 struct netdev_hw_addr *ha;
 497
 498                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter");
 499
 500                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 501
 502                 netdev_for_each_mc_addr(ha, netdev) {
 503                         u32 bitnum = smsc75xx_hash(ha->addr);
 504                         pdata->multicast_hash_table[bitnum / 32] |=
 505                                 (1 << (bitnum % 32));
 506                 }
 507         } else {
 508                 netif_dbg(dev, drv, dev->net, "receive own packets only");
 509                 pdata->rfe_ctl |= RFE_CTL_DPF;
 510         }
 511
 512         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 513
 514         /* defer register writes to a sleepable context */
 515         schedule_work(&pdata->set_multicast);
 516 }
 517
 518 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 519                                             u16 lcladv, u16 rmtadv)
 520 {
 521         u32 flow = 0, fct_flow = 0;
 522         int ret;
 523
 524         if (duplex == DUPLEX_FULL) {
 525                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 526
 527                 if (cap & FLOW_CTRL_TX) {
 528                         flow = (FLOW_TX_FCEN | 0xFFFF);
 529                         /* set fct_flow thresholds to 20% and 80% */
 530                         fct_flow = (8 << 8) | 32;
 531                 }
 532
 533                 if (cap & FLOW_CTRL_RX)
 534                         flow |= FLOW_RX_FCEN;
 535
 536                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s",
 537                         (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 538                         (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 539         } else {
 540                 netif_dbg(dev, link, dev->net, "half duplex");
 541         }
 542
 543         ret = smsc75xx_write_reg(dev, FLOW, flow);
 544         check_warn_return(ret, "Error writing FLOW");
 545
 546         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 547         check_warn_return(ret, "Error writing FCT_FLOW");
 548
 549         return 0;
 550 }
 551
 552 static int smsc75xx_link_reset(struct usbnet *dev)
 553 {
 554         struct mii_if_info *mii = &dev->mii;
 555         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 556         u16 lcladv, rmtadv;
 557         int ret;
 558
 559         /* write to clear phy interrupt status */
 560         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 561                 PHY_INT_SRC_CLEAR_ALL);
 562
 563         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 564         check_warn_return(ret, "Error writing INT_STS");
 565
 566         mii_check_media(mii, 1, 1);
 567         mii_ethtool_gset(&dev->mii, &ecmd);
 568         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 569         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 570
 571         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x"
 572                   " rmtadv: %04x", ethtool_cmd_speed(&ecmd),
 573                   ecmd.duplex, lcladv, rmtadv);
 574
 575         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 576 }
 577
 578 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 579 {
 580         u32 intdata;
 581
 582         if (urb->actual_length != 4) {
 583                 netdev_warn(dev->net,
 584                         "unexpected urb length %d", urb->actual_length);
 585                 return;
 586         }
 587
 588         memcpy(&intdata, urb->transfer_buffer, 4);
 589         le32_to_cpus(&intdata);
 590
 591         netif_dbg(dev, link, dev->net, "intdata: 0x%08X", intdata);
 592
 593         if (intdata & INT_ENP_PHY_INT)
 594                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 595         else
 596                 netdev_warn(dev->net,
 597                         "unexpected interrupt, intdata=0x%08X", intdata);
 598 }
 599
 600 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 601 {
 602         return MAX_EEPROM_SIZE;
 603 }
 604
 605 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 606                                        struct ethtool_eeprom *ee, u8 *data)
 607 {
 608         struct usbnet *dev = netdev_priv(netdev);
 609
 610         ee->magic = LAN75XX_EEPROM_MAGIC;
 611
 612         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 613 }
 614
 615 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 616                                        struct ethtool_eeprom *ee, u8 *data)
 617 {
 618         struct usbnet *dev = netdev_priv(netdev);
 619
 620         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 621                 netdev_warn(dev->net,
 622                         "EEPROM: magic value mismatch: 0x%x", ee->magic);
 623                 return -EINVAL;
 624         }
 625
 626         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 627 }
 628
 629 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 630                                      struct ethtool_wolinfo *wolinfo)
 631 {
 632         struct usbnet *dev = netdev_priv(net);
 633         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 634
 635         wolinfo->supported = SUPPORTED_WAKE;
 636         wolinfo->wolopts = pdata->wolopts;
 637 }
 638
 639 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 640                                     struct ethtool_wolinfo *wolinfo)
 641 {
 642         struct usbnet *dev = netdev_priv(net);
 643         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 644
 645         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 646         return 0;
 647 }
 648
 649 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 650         .get_link       = usbnet_get_link,
 651         .nway_reset     = usbnet_nway_reset,
 652         .get_drvinfo    = usbnet_get_drvinfo,
 653         .get_msglevel   = usbnet_get_msglevel,
 654         .set_msglevel   = usbnet_set_msglevel,
 655         .get_settings   = usbnet_get_settings,
 656         .set_settings   = usbnet_set_settings,
 657         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 658         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 659         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 660         .get_wol        = smsc75xx_ethtool_get_wol,
 661         .set_wol        = smsc75xx_ethtool_set_wol,
 662 };
 663
 664 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 665 {
 666         struct usbnet *dev = netdev_priv(netdev);
 667
 668         if (!netif_running(netdev))
 669                 return -EINVAL;
 670
 671         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 672 }
 673
 674 static void smsc75xx_init_mac_address(struct usbnet *dev)
 675 {
 676         /* try reading mac address from EEPROM */
 677         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 678                         dev->net->dev_addr) == 0) {
 679                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 680                         /* eeprom values are valid so use them */
 681                         netif_dbg(dev, ifup, dev->net,
 682                                 "MAC address read from EEPROM");
 683                         return;
 684                 }
 685         }
 686
 687         /* no eeprom, or eeprom values are invalid. generate random MAC */
 688         eth_hw_addr_random(dev->net);
 689         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr");
 690 }
 691
 692 static int smsc75xx_set_mac_address(struct usbnet *dev)
 693 {
 694         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 695                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 696         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 697
 698         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 699         check_warn_return(ret, "Failed to write RX_ADDRH: %d", ret);
 700
 701         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 702         check_warn_return(ret, "Failed to write RX_ADDRL: %d", ret);
 703
 704         addr_hi |= ADDR_FILTX_FB_VALID;
 705         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 706         check_warn_return(ret, "Failed to write ADDR_FILTX: %d", ret);
 707
 708         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 709         check_warn_return(ret, "Failed to write ADDR_FILTX+4: %d", ret);
 710
 711         return 0;
 712 }
 713
 714 static int smsc75xx_phy_initialize(struct usbnet *dev)
 715 {
 716         int bmcr, ret, timeout = 0;
 717
 718         /* Initialize MII structure */
 719         dev->mii.dev = dev->net;
 720         dev->mii.mdio_read = smsc75xx_mdio_read;
 721         dev->mii.mdio_write = smsc75xx_mdio_write;
 722         dev->mii.phy_id_mask = 0x1f;
 723         dev->mii.reg_num_mask = 0x1f;
 724         dev->mii.supports_gmii = 1;
 725         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 726
 727         /* reset phy and wait for reset to complete */
 728         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 729
 730         do {
 731                 msleep(10);
 732                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 733                 check_warn_return(bmcr, "Error reading MII_BMCR");
 734                 timeout++;
 735         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 736
 737         if (timeout >= 100) {
 738                 netdev_warn(dev->net, "timeout on PHY Reset");
 739                 return -EIO;
 740         }
 741
 742         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 743                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 744                 ADVERTISE_PAUSE_ASYM);
 745         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 746                 ADVERTISE_1000FULL);
 747
 748         /* read and write to clear phy interrupt status */
 749         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 750         check_warn_return(ret, "Error reading PHY_INT_SRC");
 751         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 752
 753         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 754                 PHY_INT_MASK_DEFAULT);
 755         mii_nway_restart(&dev->mii);
 756
 757         netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 758         return 0;
 759 }
 760
 761 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 762 {
 763         int ret = 0;
 764         u32 buf;
 765         bool rxenabled;
 766
 767         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 768         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
 769
 770         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 771
 772         if (rxenabled) {
 773                 buf &= ~MAC_RX_RXEN;
 774                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 775                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 776         }
 777
 778         /* add 4 to size for FCS */
 779         buf &= ~MAC_RX_MAX_SIZE;
 780         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 781
 782         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 783         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 784
 785         if (rxenabled) {
 786                 buf |= MAC_RX_RXEN;
 787                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 788                 check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
 789         }
 790
 791         return 0;
 792 }
 793
 794 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 795 {
 796         struct usbnet *dev = netdev_priv(netdev);
 797
 798         int ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu);
 799         check_warn_return(ret, "Failed to set mac rx frame length");
 800
 801         return usbnet_change_mtu(netdev, new_mtu);
 802 }
 803
 804 /* Enable or disable Rx checksum offload engine */
 805 static int smsc75xx_set_features(struct net_device *netdev,
 806         netdev_features_t features)
 807 {
 808         struct usbnet *dev = netdev_priv(netdev);
 809         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 810         unsigned long flags;
 811         int ret;
 812
 813         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 814
 815         if (features & NETIF_F_RXCSUM)
 816                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 817         else
 818                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 819
 820         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 821         /* it's racing here! */
 822
 823         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 824         check_warn_return(ret, "Error writing RFE_CTL");
 825
 826         return 0;
 827 }
 828
 829 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 830 {
 831         int timeout = 0;
 832
 833         do {
 834                 u32 buf;
 835                 int ret;
 836
 837                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 838
 839                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 840
 841                 if (buf & PMT_CTL_DEV_RDY)
 842                         return 0;
 843
 844                 msleep(10);
 845                 timeout++;
 846         } while (timeout < 100);
 847
 848         netdev_warn(dev->net, "timeout waiting for device ready");
 849         return -EIO;
 850 }
 851
 852 static int smsc75xx_reset(struct usbnet *dev)
 853 {
 854         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 855         u32 buf;
 856         int ret = 0, timeout;
 857
 858         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset");
 859
 860         ret = smsc75xx_wait_ready(dev, 0);
 861         check_warn_return(ret, "device not ready in smsc75xx_reset");
 862
 863         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 864         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 865
 866         buf |= HW_CFG_LRST;
 867
 868         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 869         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 870
 871         timeout = 0;
 872         do {
 873                 msleep(10);
 874                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 875                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 876                 timeout++;
 877         } while ((buf & HW_CFG_LRST) && (timeout < 100));
 878
 879         if (timeout >= 100) {
 880                 netdev_warn(dev->net, "timeout on completion of Lite Reset");
 881                 return -EIO;
 882         }
 883
 884         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY");
 885
 886         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 887         check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 888
 889         buf |= PMT_CTL_PHY_RST;
 890
 891         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
 892         check_warn_return(ret, "Failed to write PMT_CTL: %d", ret);
 893
 894         timeout = 0;
 895         do {
 896                 msleep(10);
 897                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
 898                 check_warn_return(ret, "Failed to read PMT_CTL: %d", ret);
 899                 timeout++;
 900         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
 901
 902         if (timeout >= 100) {
 903                 netdev_warn(dev->net, "timeout waiting for PHY Reset");
 904                 return -EIO;
 905         }
 906
 907         netif_dbg(dev, ifup, dev->net, "PHY reset complete");
 908
 909         smsc75xx_init_mac_address(dev);
 910
 911         ret = smsc75xx_set_mac_address(dev);
 912         check_warn_return(ret, "Failed to set mac address");
 913
 914         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM", dev->net->dev_addr);
 915
 916         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 917         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 918
 919         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x", buf);
 920
 921         buf |= HW_CFG_BIR;
 922
 923         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 924         check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 925
 926         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 927         check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 928
 929         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after "
 930                         "writing HW_CFG_BIR: 0x%08x", buf);
 931
 932         if (!turbo_mode) {
 933                 buf = 0;
 934                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
 935         } else if (dev->udev->speed == USB_SPEED_HIGH) {
 936                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
 937                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
 938         } else {
 939                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
 940                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
 941         }
 942
 943         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld",
 944                 (ulong)dev->rx_urb_size);
 945
 946         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
 947         check_warn_return(ret, "Failed to write BURST_CAP: %d", ret);
 948
 949         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
 950         check_warn_return(ret, "Failed to read BURST_CAP: %d", ret);
 951
 952         netif_dbg(dev, ifup, dev->net,
 953                 "Read Value from BURST_CAP after writing: 0x%08x", buf);
 954
 955         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
 956         check_warn_return(ret, "Failed to write BULK_IN_DLY: %d", ret);
 957
 958         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
 959         check_warn_return(ret, "Failed to read BULK_IN_DLY: %d", ret);
 960
 961         netif_dbg(dev, ifup, dev->net,
 962                 "Read Value from BULK_IN_DLY after writing: 0x%08x", buf);
 963
 964         if (turbo_mode) {
 965                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 966                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 967
 968                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 969
 970                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
 971
 972                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
 973                 check_warn_return(ret, "Failed to write HW_CFG: %d", ret);
 974
 975                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
 976                 check_warn_return(ret, "Failed to read HW_CFG: %d", ret);
 977
 978                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x", buf);
 979         }
 980
 981         /* set FIFO sizes */
 982         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
 983         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
 984         check_warn_return(ret, "Failed to write FCT_RX_FIFO_END: %d", ret);
 985
 986         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x", buf);
 987
 988         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
 989         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
 990         check_warn_return(ret, "Failed to write FCT_TX_FIFO_END: %d", ret);
 991
 992         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x", buf);
 993
 994         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 995         check_warn_return(ret, "Failed to write INT_STS: %d", ret);
 996
 997         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
 998         check_warn_return(ret, "Failed to read ID_REV: %d", ret);
 999
1000         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x", buf);
1001
1002         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1003         check_warn_return(ret, "Failed to read E2P_CMD: %d", ret);
1004
1005         /* only set default GPIO/LED settings if no EEPROM is detected */
1006         if (!(buf & E2P_CMD_LOADED)) {
1007                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1008                 check_warn_return(ret, "Failed to read LED_GPIO_CFG: %d", ret);
1009
1010                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1011                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1012
1013                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1014                 check_warn_return(ret, "Failed to write LED_GPIO_CFG: %d", ret);
1015         }
1016
1017         ret = smsc75xx_write_reg(dev, FLOW, 0);
1018         check_warn_return(ret, "Failed to write FLOW: %d", ret);
1019
1020         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1021         check_warn_return(ret, "Failed to write FCT_FLOW: %d", ret);
1022
1023         /* Don't need rfe_ctl_lock during initialisation */
1024         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1025         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1026
1027         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1028
1029         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1030         check_warn_return(ret, "Failed to write RFE_CTL: %d", ret);
1031
1032         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1033         check_warn_return(ret, "Failed to read RFE_CTL: %d", ret);
1034
1035         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x", pdata->rfe_ctl);
1036
1037         /* Enable or disable checksum offload engines */
1038         smsc75xx_set_features(dev->net, dev->net->features);
1039
1040         smsc75xx_set_multicast(dev->net);
1041
1042         ret = smsc75xx_phy_initialize(dev);
1043         check_warn_return(ret, "Failed to initialize PHY: %d", ret);
1044
1045         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1046         check_warn_return(ret, "Failed to read INT_EP_CTL: %d", ret);
1047
1048         /* enable PHY interrupts */
1049         buf |= INT_ENP_PHY_INT;
1050
1051         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1052         check_warn_return(ret, "Failed to write INT_EP_CTL: %d", ret);
1053
1054         /* allow mac to detect speed and duplex from phy */
1055         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1056         check_warn_return(ret, "Failed to read MAC_CR: %d", ret);
1057
1058         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1059         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1060         check_warn_return(ret, "Failed to write MAC_CR: %d", ret);
1061
1062         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1063         check_warn_return(ret, "Failed to read MAC_TX: %d", ret);
1064
1065         buf |= MAC_TX_TXEN;
1066
1067         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1068         check_warn_return(ret, "Failed to write MAC_TX: %d", ret);
1069
1070         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x", buf);
1071
1072         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1073         check_warn_return(ret, "Failed to read FCT_TX_CTL: %d", ret);
1074
1075         buf |= FCT_TX_CTL_EN;
1076
1077         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1078         check_warn_return(ret, "Failed to write FCT_TX_CTL: %d", ret);
1079
1080         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x", buf);
1081
1082         ret = smsc75xx_set_rx_max_frame_length(dev, 1514);
1083         check_warn_return(ret, "Failed to set max rx frame length");
1084
1085         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1086         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1087
1088         buf |= MAC_RX_RXEN;
1089
1090         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1091         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1092
1093         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x", buf);
1094
1095         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1096         check_warn_return(ret, "Failed to read FCT_RX_CTL: %d", ret);
1097
1098         buf |= FCT_RX_CTL_EN;
1099
1100         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1101         check_warn_return(ret, "Failed to write FCT_RX_CTL: %d", ret);
1102
1103         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x", buf);
1104
1105         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0");
1106         return 0;
1107 }
1108
1109 static const struct net_device_ops smsc75xx_netdev_ops = {
1110         .ndo_open               = usbnet_open,
1111         .ndo_stop               = usbnet_stop,
1112         .ndo_start_xmit         = usbnet_start_xmit,
1113         .ndo_tx_timeout         = usbnet_tx_timeout,
1114         .ndo_change_mtu         = smsc75xx_change_mtu,
1115         .ndo_set_mac_address    = eth_mac_addr,
1116         .ndo_validate_addr      = eth_validate_addr,
1117         .ndo_do_ioctl           = smsc75xx_ioctl,
1118         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1119         .ndo_set_features       = smsc75xx_set_features,
1120 };
1121
1122 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1123 {
1124         struct smsc75xx_priv *pdata = NULL;
1125         int ret;
1126
1127         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1128
1129         ret = usbnet_get_endpoints(dev, intf);
1130         check_warn_return(ret, "usbnet_get_endpoints failed: %d", ret);
1131
1132         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1133                 GFP_KERNEL);
1134
1135         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1136         if (!pdata) {
1137                 netdev_warn(dev->net, "Unable to allocate smsc75xx_priv");
1138                 return -ENOMEM;
1139         }
1140
1141         pdata->dev = dev;
1142
1143         spin_lock_init(&pdata->rfe_ctl_lock);
1144         mutex_init(&pdata->dataport_mutex);
1145
1146         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1147
1148         if (DEFAULT_TX_CSUM_ENABLE) {
1149                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1150                 if (DEFAULT_TSO_ENABLE)
1151                         dev->net->features |= NETIF_F_SG |
1152                                 NETIF_F_TSO | NETIF_F_TSO6;
1153         }
1154         if (DEFAULT_RX_CSUM_ENABLE)
1155                 dev->net->features |= NETIF_F_RXCSUM;
1156
1157         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1158                 NETIF_F_SG | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_RXCSUM;
1159
1160         /* Init all registers */
1161         ret = smsc75xx_reset(dev);
1162
1163         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1164         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1165         dev->net->flags |= IFF_MULTICAST;
1166         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1167         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1168         return 0;
1169 }
1170
1171 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1172 {
1173         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1174         if (pdata) {
1175                 netif_dbg(dev, ifdown, dev->net, "free pdata");
1176                 kfree(pdata);
1177                 pdata = NULL;
1178                 dev->data[0] = 0;
1179         }
1180 }
1181
1182 static u16 smsc_crc(const u8 *buffer, size_t len)
1183 {
1184         return bitrev16(crc16(0xFFFF, buffer, len));
1185 }
1186
1187 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1188                                u32 wuf_mask1)
1189 {
1190         int cfg_base = WUF_CFGX + filter * 4;
1191         int mask_base = WUF_MASKX + filter * 16;
1192         int ret;
1193
1194         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1195         check_warn_return(ret, "Error writing WUF_CFGX");
1196
1197         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1198         check_warn_return(ret, "Error writing WUF_MASKX");
1199
1200         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1201         check_warn_return(ret, "Error writing WUF_MASKX");
1202
1203         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1204         check_warn_return(ret, "Error writing WUF_MASKX");
1205
1206         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1207         check_warn_return(ret, "Error writing WUF_MASKX");
1208
1209         return 0;
1210 }
1211
1212 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1213 {
1214         struct usbnet *dev = usb_get_intfdata(intf);
1215         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1216         int ret;
1217         u32 val;
1218
1219         ret = usbnet_suspend(intf, message);
1220         check_warn_return(ret, "usbnet_suspend error");
1221
1222         /* if no wol options set, enter lowest power SUSPEND2 mode */
1223         if (!(pdata->wolopts & SUPPORTED_WAKE)) {
1224                 netdev_info(dev->net, "entering SUSPEND2 mode");
1225
1226                 /* disable energy detect (link up) & wake up events */
1227                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1228                 check_warn_return(ret, "Error reading WUCSR");
1229
1230                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1231
1232                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1233                 check_warn_return(ret, "Error writing WUCSR");
1234
1235                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1236                 check_warn_return(ret, "Error reading PMT_CTL");
1237
1238                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1239
1240                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1241                 check_warn_return(ret, "Error writing PMT_CTL");
1242
1243                 /* enter suspend2 mode */
1244                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1245                 check_warn_return(ret, "Error reading PMT_CTL");
1246
1247                 val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1248                 val |= PMT_CTL_SUS_MODE_2;
1249
1250                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1251                 check_warn_return(ret, "Error writing PMT_CTL");
1252
1253                 return 0;
1254         }
1255
1256         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1257                 int i, filter = 0;
1258
1259                 /* disable all filters */
1260                 for (i = 0; i < WUF_NUM; i++) {
1261                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1262                         check_warn_return(ret, "Error writing WUF_CFGX");
1263                 }
1264
1265                 if (pdata->wolopts & WAKE_MCAST) {
1266                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1267                         netdev_info(dev->net, "enabling multicast detection");
1268
1269                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1270                                 | smsc_crc(mcast, 3);
1271                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1272                         check_warn_return(ret, "Error writing wakeup filter");
1273                 }
1274
1275                 if (pdata->wolopts & WAKE_ARP) {
1276                         const u8 arp[] = {0x08, 0x06};
1277                         netdev_info(dev->net, "enabling ARP detection");
1278
1279                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1280                                 | smsc_crc(arp, 2);
1281                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1282                         check_warn_return(ret, "Error writing wakeup filter");
1283                 }
1284
1285                 /* clear any pending pattern match packet status */
1286                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1287                 check_warn_return(ret, "Error reading WUCSR");
1288
1289                 val |= WUCSR_WUFR;
1290
1291                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1292                 check_warn_return(ret, "Error writing WUCSR");
1293
1294                 netdev_info(dev->net, "enabling packet match detection");
1295                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1296                 check_warn_return(ret, "Error reading WUCSR");
1297
1298                 val |= WUCSR_WUEN;
1299
1300                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1301                 check_warn_return(ret, "Error writing WUCSR");
1302         } else {
1303                 netdev_info(dev->net, "disabling packet match detection");
1304                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1305                 check_warn_return(ret, "Error reading WUCSR");
1306
1307                 val &= ~WUCSR_WUEN;
1308
1309                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1310                 check_warn_return(ret, "Error writing WUCSR");
1311         }
1312
1313         /* disable magic, bcast & unicast wakeup sources */
1314         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1315         check_warn_return(ret, "Error reading WUCSR");
1316
1317         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1318
1319         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1320         check_warn_return(ret, "Error writing WUCSR");
1321
1322         if (pdata->wolopts & WAKE_MAGIC) {
1323                 netdev_info(dev->net, "enabling magic packet wakeup");
1324                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1325                 check_warn_return(ret, "Error reading WUCSR");
1326
1327                 /* clear any pending magic packet status */
1328                 val |= WUCSR_MPR | WUCSR_MPEN;
1329
1330                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1331                 check_warn_return(ret, "Error writing WUCSR");
1332         }
1333
1334         if (pdata->wolopts & WAKE_BCAST) {
1335                 netdev_info(dev->net, "enabling broadcast detection");
1336                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1337                 check_warn_return(ret, "Error reading WUCSR");
1338
1339                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1340
1341                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1342                 check_warn_return(ret, "Error writing WUCSR");
1343         }
1344
1345         if (pdata->wolopts & WAKE_UCAST) {
1346                 netdev_info(dev->net, "enabling unicast detection");
1347                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1348                 check_warn_return(ret, "Error reading WUCSR");
1349
1350                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1351
1352                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1353                 check_warn_return(ret, "Error writing WUCSR");
1354         }
1355
1356         /* enable receiver to enable frame reception */
1357         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
1358         check_warn_return(ret, "Failed to read MAC_RX: %d", ret);
1359
1360         val |= MAC_RX_RXEN;
1361
1362         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
1363         check_warn_return(ret, "Failed to write MAC_RX: %d", ret);
1364
1365         /* some wol options are enabled, so enter SUSPEND0 */
1366         netdev_info(dev->net, "entering SUSPEND0 mode");
1367
1368         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1369         check_warn_return(ret, "Error reading PMT_CTL");
1370
1371         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1372         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1373
1374         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1375         check_warn_return(ret, "Error writing PMT_CTL");
1376
1377         smsc75xx_set_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1378
1379         return 0;
1380 }
1381
1382 static int smsc75xx_resume(struct usb_interface *intf)
1383 {
1384         struct usbnet *dev = usb_get_intfdata(intf);
1385         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1386         int ret;
1387         u32 val;
1388
1389         if (pdata->wolopts) {
1390                 netdev_info(dev->net, "resuming from SUSPEND0");
1391
1392                 smsc75xx_clear_feature(dev, USB_DEVICE_REMOTE_WAKEUP);
1393
1394                 /* Disable wakeup sources */
1395                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1396                 check_warn_return(ret, "Error reading WUCSR");
1397
1398                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
1399                         | WUCSR_BCST_EN);
1400
1401                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1402                 check_warn_return(ret, "Error writing WUCSR");
1403
1404                 /* clear wake-up status */
1405                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1406                 check_warn_return(ret, "Error reading PMT_CTL");
1407
1408                 val &= ~PMT_CTL_WOL_EN;
1409                 val |= PMT_CTL_WUPS;
1410
1411                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1412                 check_warn_return(ret, "Error writing PMT_CTL");
1413         } else {
1414                 netdev_info(dev->net, "resuming from SUSPEND2");
1415
1416                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1417                 check_warn_return(ret, "Error reading PMT_CTL");
1418
1419                 val |= PMT_CTL_PHY_PWRUP;
1420
1421                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1422                 check_warn_return(ret, "Error writing PMT_CTL");
1423         }
1424
1425         ret = smsc75xx_wait_ready(dev, 1);
1426         check_warn_return(ret, "device not ready in smsc75xx_resume");
1427
1428         return usbnet_resume(intf);
1429 }
1430
1431 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
1432                                      u32 rx_cmd_a, u32 rx_cmd_b)
1433 {
1434         if (!(dev->net->features & NETIF_F_RXCSUM) ||
1435             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
1436                 skb->ip_summed = CHECKSUM_NONE;
1437         } else {
1438                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
1439                 skb->ip_summed = CHECKSUM_COMPLETE;
1440         }
1441 }
1442
1443 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
1444 {
1445         while (skb->len > 0) {
1446                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
1447                 struct sk_buff *ax_skb;
1448                 unsigned char *packet;
1449
1450                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
1451                 le32_to_cpus(&rx_cmd_a);
1452                 skb_pull(skb, 4);
1453
1454                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
1455                 le32_to_cpus(&rx_cmd_b);
1456                 skb_pull(skb, 4 + RXW_PADDING);
1457
1458                 packet = skb->data;
1459
1460                 /* get the packet length */
1461                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
1462                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
1463
1464                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
1465                         netif_dbg(dev, rx_err, dev->net,
1466                                 "Error rx_cmd_a=0x%08x", rx_cmd_a);
1467                         dev->net->stats.rx_errors++;
1468                         dev->net->stats.rx_dropped++;
1469
1470                         if (rx_cmd_a & RX_CMD_A_FCS)
1471                                 dev->net->stats.rx_crc_errors++;
1472                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
1473                                 dev->net->stats.rx_frame_errors++;
1474                 } else {
1475                         /* ETH_FRAME_LEN + 4(CRC) + 2(COE) + 4(Vlan) */
1476                         if (unlikely(size > (ETH_FRAME_LEN + 12))) {
1477                                 netif_dbg(dev, rx_err, dev->net,
1478                                         "size err rx_cmd_a=0x%08x", rx_cmd_a);
1479                                 return 0;
1480                         }
1481
1482                         /* last frame in this batch */
1483                         if (skb->len == size) {
1484                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
1485                                         rx_cmd_b);
1486
1487                                 skb_trim(skb, skb->len - 4); /* remove fcs */
1488                                 skb->truesize = size + sizeof(struct sk_buff);
1489
1490                                 return 1;
1491                         }
1492
1493                         ax_skb = skb_clone(skb, GFP_ATOMIC);
1494                         if (unlikely(!ax_skb)) {
1495                                 netdev_warn(dev->net, "Error allocating skb");
1496                                 return 0;
1497                         }
1498
1499                         ax_skb->len = size;
1500                         ax_skb->data = packet;
1501                         skb_set_tail_pointer(ax_skb, size);
1502
1503                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
1504                                 rx_cmd_b);
1505
1506                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
1507                         ax_skb->truesize = size + sizeof(struct sk_buff);
1508
1509                         usbnet_skb_return(dev, ax_skb);
1510                 }
1511
1512                 skb_pull(skb, size);
1513
1514                 /* padding bytes before the next frame starts */
1515                 if (skb->len)
1516                         skb_pull(skb, align_count);
1517         }
1518
1519         if (unlikely(skb->len < 0)) {
1520                 netdev_warn(dev->net, "invalid rx length<0 %d", skb->len);
1521                 return 0;
1522         }
1523
1524         return 1;
1525 }
1526
1527 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
1528                                          struct sk_buff *skb, gfp_t flags)
1529 {
1530         u32 tx_cmd_a, tx_cmd_b;
1531
1532         skb_linearize(skb);
1533
1534         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
1535                 struct sk_buff *skb2 =
1536                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
1537                 dev_kfree_skb_any(skb);
1538                 skb = skb2;
1539                 if (!skb)
1540                         return NULL;
1541         }
1542
1543         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
1544
1545         if (skb->ip_summed == CHECKSUM_PARTIAL)
1546                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
1547
1548         if (skb_is_gso(skb)) {
1549                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
1550                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
1551
1552                 tx_cmd_a |= TX_CMD_A_LSO;
1553         } else {
1554                 tx_cmd_b = 0;
1555         }
1556
1557         skb_push(skb, 4);
1558         cpu_to_le32s(&tx_cmd_b);
1559         memcpy(skb->data, &tx_cmd_b, 4);
1560
1561         skb_push(skb, 4);
1562         cpu_to_le32s(&tx_cmd_a);
1563         memcpy(skb->data, &tx_cmd_a, 4);
1564
1565         return skb;
1566 }
1567
1568 static const struct driver_info smsc75xx_info = {
1569         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
1570         .bind           = smsc75xx_bind,
1571         .unbind         = smsc75xx_unbind,
1572         .link_reset     = smsc75xx_link_reset,
1573         .reset          = smsc75xx_reset,
1574         .rx_fixup       = smsc75xx_rx_fixup,
1575         .tx_fixup       = smsc75xx_tx_fixup,
1576         .status         = smsc75xx_status,
1577         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
1578 };
1579
1580 static const struct usb_device_id products[] = {
1581         {
1582                 /* SMSC7500 USB Gigabit Ethernet Device */
1583                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
1584                 .driver_info = (unsigned long) &smsc75xx_info,
1585         },
1586         {
1587                 /* SMSC7500 USB Gigabit Ethernet Device */
1588                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
1589                 .driver_info = (unsigned long) &smsc75xx_info,
1590         },
1591         { },            /* END */
1592 };
1593 MODULE_DEVICE_TABLE(usb, products);
1594
1595 static struct usb_driver smsc75xx_driver = {
1596         .name           = SMSC_CHIPNAME,
1597         .id_table       = products,
1598         .probe          = usbnet_probe,
1599         .suspend        = smsc75xx_suspend,
1600         .resume         = smsc75xx_resume,
1601         .reset_resume   = smsc75xx_resume,
1602         .disconnect     = usbnet_disconnect,
1603         .disable_hub_initiated_lpm = 1,
1604 };
1605
1606 module_usb_driver(smsc75xx_driver);
1607
1608 MODULE_AUTHOR("Nancy Lin");
1609 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
1610 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
1611 MODULE_LICENSE("GPL");