drivers/net/usb/smsc75xx.c

   1  /***************************************************************************
   2  *
   3  * Copyright (C) 2007-2010 SMSC
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  *
  18  *****************************************************************************/
  19
  20 #include <linux/module.h>
  21 #include <linux/kmod.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/etherdevice.h>
  24 #include <linux/ethtool.h>
  25 #include <linux/mii.h>
  26 #include <linux/usb.h>
  27 #include <linux/bitrev.h>
  28 #include <linux/crc16.h>
  29 #include <linux/crc32.h>
  30 #include <linux/usb/usbnet.h>
  31 #include <linux/slab.h>
  32 #include <linux/of_net.h>
  33 #include "smsc75xx.h"
  34
  35 #define SMSC_CHIPNAME                   "smsc75xx"
  36 #define SMSC_DRIVER_VERSION             "1.0.0"
  37 #define HS_USB_PKT_SIZE                 (512)
  38 #define FS_USB_PKT_SIZE                 (64)
  39 #define DEFAULT_HS_BURST_CAP_SIZE       (16 * 1024 + 5 * HS_USB_PKT_SIZE)
  40 #define DEFAULT_FS_BURST_CAP_SIZE       (6 * 1024 + 33 * FS_USB_PKT_SIZE)
  41 #define DEFAULT_BULK_IN_DELAY           (0x00002000)
  42 #define MAX_SINGLE_PACKET_SIZE          (9000)
  43 #define LAN75XX_EEPROM_MAGIC            (0x7500)
  44 #define EEPROM_MAC_OFFSET               (0x01)
  45 #define DEFAULT_TX_CSUM_ENABLE          (true)
  46 #define DEFAULT_RX_CSUM_ENABLE          (true)
  47 #define SMSC75XX_INTERNAL_PHY_ID        (1)
  48 #define SMSC75XX_TX_OVERHEAD            (8)
  49 #define MAX_RX_FIFO_SIZE                (20 * 1024)
  50 #define MAX_TX_FIFO_SIZE                (12 * 1024)
  51 #define USB_VENDOR_ID_SMSC              (0x0424)
  52 #define USB_PRODUCT_ID_LAN7500          (0x7500)
  53 #define USB_PRODUCT_ID_LAN7505          (0x7505)
  54 #define RXW_PADDING                     2
  55 #define SUPPORTED_WAKE                  (WAKE_PHY | WAKE_UCAST | WAKE_BCAST | \
  56                                          WAKE_MCAST | WAKE_ARP | WAKE_MAGIC)
  57
  58 #define SUSPEND_SUSPEND0                (0x01)
  59 #define SUSPEND_SUSPEND1                (0x02)
  60 #define SUSPEND_SUSPEND2                (0x04)
  61 #define SUSPEND_SUSPEND3                (0x08)
  62 #define SUSPEND_ALLMODES                (SUSPEND_SUSPEND0 | SUSPEND_SUSPEND1 | \
  63                                          SUSPEND_SUSPEND2 | SUSPEND_SUSPEND3)
  64
  65 struct smsc75xx_priv {
  66         struct usbnet *dev;
  67         u32 rfe_ctl;
  68         u32 wolopts;
  69         u32 multicast_hash_table[DP_SEL_VHF_HASH_LEN];
  70         struct mutex dataport_mutex;
  71         spinlock_t rfe_ctl_lock;
  72         struct work_struct set_multicast;
  73         u8 suspend_flags;
  74 };
  75
  76 struct usb_context {
  77         struct usb_ctrlrequest req;
  78         struct usbnet *dev;
  79 };
  80
  81 static bool turbo_mode = true;
  82 module_param(turbo_mode, bool, 0644);
  83 MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  84
  85 static int __must_check __smsc75xx_read_reg(struct usbnet *dev, u32 index,
  86                                             u32 *data, int in_pm)
  87 {
  88         u32 buf;
  89         int ret;
  90         int (*fn)(struct usbnet *, u8, u8, u16, u16, void *, u16);
  91
  92         BUG_ON(!dev);
  93
  94         if (!in_pm)
  95                 fn = usbnet_read_cmd;
  96         else
  97                 fn = usbnet_read_cmd_nopm;
  98
  99         ret = fn(dev, USB_VENDOR_REQUEST_READ_REGISTER, USB_DIR_IN
 100                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 101                  0, index, &buf, 4);
 102         if (unlikely(ret < 0)) {
 103                 netdev_warn(dev->net, "Failed to read reg index 0x%08x: %d\n",
 104                             index, ret);
 105                 return ret;
 106         }
 107
 108         le32_to_cpus(&buf);
 109         *data = buf;
 110
 111         return ret;
 112 }
 113
 114 static int __must_check __smsc75xx_write_reg(struct usbnet *dev, u32 index,
 115                                              u32 data, int in_pm)
 116 {
 117         u32 buf;
 118         int ret;
 119         int (*fn)(struct usbnet *, u8, u8, u16, u16, const void *, u16);
 120
 121         BUG_ON(!dev);
 122
 123         if (!in_pm)
 124                 fn = usbnet_write_cmd;
 125         else
 126                 fn = usbnet_write_cmd_nopm;
 127
 128         buf = data;
 129         cpu_to_le32s(&buf);
 130
 131         ret = fn(dev, USB_VENDOR_REQUEST_WRITE_REGISTER, USB_DIR_OUT
 132                  | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 133                  0, index, &buf, 4);
 134         if (unlikely(ret < 0))
 135                 netdev_warn(dev->net, "Failed to write reg index 0x%08x: %d\n",
 136                             index, ret);
 137
 138         return ret;
 139 }
 140
 141 static int __must_check smsc75xx_read_reg_nopm(struct usbnet *dev, u32 index,
 142                                                u32 *data)
 143 {
 144         return __smsc75xx_read_reg(dev, index, data, 1);
 145 }
 146
 147 static int __must_check smsc75xx_write_reg_nopm(struct usbnet *dev, u32 index,
 148                                                 u32 data)
 149 {
 150         return __smsc75xx_write_reg(dev, index, data, 1);
 151 }
 152
 153 static int __must_check smsc75xx_read_reg(struct usbnet *dev, u32 index,
 154                                           u32 *data)
 155 {
 156         return __smsc75xx_read_reg(dev, index, data, 0);
 157 }
 158
 159 static int __must_check smsc75xx_write_reg(struct usbnet *dev, u32 index,
 160                                            u32 data)
 161 {
 162         return __smsc75xx_write_reg(dev, index, data, 0);
 163 }
 164
 165 /* Loop until the read is completed with timeout
 166  * called with phy_mutex held */
 167 static __must_check int __smsc75xx_phy_wait_not_busy(struct usbnet *dev,
 168                                                      int in_pm)
 169 {
 170         unsigned long start_time = jiffies;
 171         u32 val;
 172         int ret;
 173
 174         do {
 175                 ret = __smsc75xx_read_reg(dev, MII_ACCESS, &val, in_pm);
 176                 if (ret < 0) {
 177                         netdev_warn(dev->net, "Error reading MII_ACCESS\n");
 178                         return ret;
 179                 }
 180
 181                 if (!(val & MII_ACCESS_BUSY))
 182                         return 0;
 183         } while (!time_after(jiffies, start_time + HZ));
 184
 185         return -EIO;
 186 }
 187
 188 static int __smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx,
 189                                 int in_pm)
 190 {
 191         struct usbnet *dev = netdev_priv(netdev);
 192         u32 val, addr;
 193         int ret;
 194
 195         mutex_lock(&dev->phy_mutex);
 196
 197         /* confirm MII not busy */
 198         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 199         if (ret < 0) {
 200                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_read\n");
 201                 goto done;
 202         }
 203
 204         /* set the address, index & direction (read from PHY) */
 205         phy_id &= dev->mii.phy_id_mask;
 206         idx &= dev->mii.reg_num_mask;
 207         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 208                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 209                 | MII_ACCESS_READ | MII_ACCESS_BUSY;
 210         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 211         if (ret < 0) {
 212                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 213                 goto done;
 214         }
 215
 216         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 217         if (ret < 0) {
 218                 netdev_warn(dev->net, "Timed out reading MII reg %02X\n", idx);
 219                 goto done;
 220         }
 221
 222         ret = __smsc75xx_read_reg(dev, MII_DATA, &val, in_pm);
 223         if (ret < 0) {
 224                 netdev_warn(dev->net, "Error reading MII_DATA\n");
 225                 goto done;
 226         }
 227
 228         ret = (u16)(val & 0xFFFF);
 229
 230 done:
 231         mutex_unlock(&dev->phy_mutex);
 232         return ret;
 233 }
 234
 235 static void __smsc75xx_mdio_write(struct net_device *netdev, int phy_id,
 236                                   int idx, int regval, int in_pm)
 237 {
 238         struct usbnet *dev = netdev_priv(netdev);
 239         u32 val, addr;
 240         int ret;
 241
 242         mutex_lock(&dev->phy_mutex);
 243
 244         /* confirm MII not busy */
 245         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 246         if (ret < 0) {
 247                 netdev_warn(dev->net, "MII is busy in smsc75xx_mdio_write\n");
 248                 goto done;
 249         }
 250
 251         val = regval;
 252         ret = __smsc75xx_write_reg(dev, MII_DATA, val, in_pm);
 253         if (ret < 0) {
 254                 netdev_warn(dev->net, "Error writing MII_DATA\n");
 255                 goto done;
 256         }
 257
 258         /* set the address, index & direction (write to PHY) */
 259         phy_id &= dev->mii.phy_id_mask;
 260         idx &= dev->mii.reg_num_mask;
 261         addr = ((phy_id << MII_ACCESS_PHY_ADDR_SHIFT) & MII_ACCESS_PHY_ADDR)
 262                 | ((idx << MII_ACCESS_REG_ADDR_SHIFT) & MII_ACCESS_REG_ADDR)
 263                 | MII_ACCESS_WRITE | MII_ACCESS_BUSY;
 264         ret = __smsc75xx_write_reg(dev, MII_ACCESS, addr, in_pm);
 265         if (ret < 0) {
 266                 netdev_warn(dev->net, "Error writing MII_ACCESS\n");
 267                 goto done;
 268         }
 269
 270         ret = __smsc75xx_phy_wait_not_busy(dev, in_pm);
 271         if (ret < 0) {
 272                 netdev_warn(dev->net, "Timed out writing MII reg %02X\n", idx);
 273                 goto done;
 274         }
 275
 276 done:
 277         mutex_unlock(&dev->phy_mutex);
 278 }
 279
 280 static int smsc75xx_mdio_read_nopm(struct net_device *netdev, int phy_id,
 281                                    int idx)
 282 {
 283         return __smsc75xx_mdio_read(netdev, phy_id, idx, 1);
 284 }
 285
 286 static void smsc75xx_mdio_write_nopm(struct net_device *netdev, int phy_id,
 287                                      int idx, int regval)
 288 {
 289         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 1);
 290 }
 291
 292 static int smsc75xx_mdio_read(struct net_device *netdev, int phy_id, int idx)
 293 {
 294         return __smsc75xx_mdio_read(netdev, phy_id, idx, 0);
 295 }
 296
 297 static void smsc75xx_mdio_write(struct net_device *netdev, int phy_id, int idx,
 298                                 int regval)
 299 {
 300         __smsc75xx_mdio_write(netdev, phy_id, idx, regval, 0);
 301 }
 302
 303 static int smsc75xx_wait_eeprom(struct usbnet *dev)
 304 {
 305         unsigned long start_time = jiffies;
 306         u32 val;
 307         int ret;
 308
 309         do {
 310                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 311                 if (ret < 0) {
 312                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 313                         return ret;
 314                 }
 315
 316                 if (!(val & E2P_CMD_BUSY) || (val & E2P_CMD_TIMEOUT))
 317                         break;
 318                 udelay(40);
 319         } while (!time_after(jiffies, start_time + HZ));
 320
 321         if (val & (E2P_CMD_TIMEOUT | E2P_CMD_BUSY)) {
 322                 netdev_warn(dev->net, "EEPROM read operation timeout\n");
 323                 return -EIO;
 324         }
 325
 326         return 0;
 327 }
 328
 329 static int smsc75xx_eeprom_confirm_not_busy(struct usbnet *dev)
 330 {
 331         unsigned long start_time = jiffies;
 332         u32 val;
 333         int ret;
 334
 335         do {
 336                 ret = smsc75xx_read_reg(dev, E2P_CMD, &val);
 337                 if (ret < 0) {
 338                         netdev_warn(dev->net, "Error reading E2P_CMD\n");
 339                         return ret;
 340                 }
 341
 342                 if (!(val & E2P_CMD_BUSY))
 343                         return 0;
 344
 345                 udelay(40);
 346         } while (!time_after(jiffies, start_time + HZ));
 347
 348         netdev_warn(dev->net, "EEPROM is busy\n");
 349         return -EIO;
 350 }
 351
 352 static int smsc75xx_read_eeprom(struct usbnet *dev, u32 offset, u32 length,
 353                                 u8 *data)
 354 {
 355         u32 val;
 356         int i, ret;
 357
 358         BUG_ON(!dev);
 359         BUG_ON(!data);
 360
 361         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 362         if (ret)
 363                 return ret;
 364
 365         for (i = 0; i < length; i++) {
 366                 val = E2P_CMD_BUSY | E2P_CMD_READ | (offset & E2P_CMD_ADDR);
 367                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 368                 if (ret < 0) {
 369                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 370                         return ret;
 371                 }
 372
 373                 ret = smsc75xx_wait_eeprom(dev);
 374                 if (ret < 0)
 375                         return ret;
 376
 377                 ret = smsc75xx_read_reg(dev, E2P_DATA, &val);
 378                 if (ret < 0) {
 379                         netdev_warn(dev->net, "Error reading E2P_DATA\n");
 380                         return ret;
 381                 }
 382
 383                 data[i] = val & 0xFF;
 384                 offset++;
 385         }
 386
 387         return 0;
 388 }
 389
 390 static int smsc75xx_write_eeprom(struct usbnet *dev, u32 offset, u32 length,
 391                                  u8 *data)
 392 {
 393         u32 val;
 394         int i, ret;
 395
 396         BUG_ON(!dev);
 397         BUG_ON(!data);
 398
 399         ret = smsc75xx_eeprom_confirm_not_busy(dev);
 400         if (ret)
 401                 return ret;
 402
 403         /* Issue write/erase enable command */
 404         val = E2P_CMD_BUSY | E2P_CMD_EWEN;
 405         ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 406         if (ret < 0) {
 407                 netdev_warn(dev->net, "Error writing E2P_CMD\n");
 408                 return ret;
 409         }
 410
 411         ret = smsc75xx_wait_eeprom(dev);
 412         if (ret < 0)
 413                 return ret;
 414
 415         for (i = 0; i < length; i++) {
 416
 417                 /* Fill data register */
 418                 val = data[i];
 419                 ret = smsc75xx_write_reg(dev, E2P_DATA, val);
 420                 if (ret < 0) {
 421                         netdev_warn(dev->net, "Error writing E2P_DATA\n");
 422                         return ret;
 423                 }
 424
 425                 /* Send "write" command */
 426                 val = E2P_CMD_BUSY | E2P_CMD_WRITE | (offset & E2P_CMD_ADDR);
 427                 ret = smsc75xx_write_reg(dev, E2P_CMD, val);
 428                 if (ret < 0) {
 429                         netdev_warn(dev->net, "Error writing E2P_CMD\n");
 430                         return ret;
 431                 }
 432
 433                 ret = smsc75xx_wait_eeprom(dev);
 434                 if (ret < 0)
 435                         return ret;
 436
 437                 offset++;
 438         }
 439
 440         return 0;
 441 }
 442
 443 static int smsc75xx_dataport_wait_not_busy(struct usbnet *dev)
 444 {
 445         int i, ret;
 446
 447         for (i = 0; i < 100; i++) {
 448                 u32 dp_sel;
 449                 ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 450                 if (ret < 0) {
 451                         netdev_warn(dev->net, "Error reading DP_SEL\n");
 452                         return ret;
 453                 }
 454
 455                 if (dp_sel & DP_SEL_DPRDY)
 456                         return 0;
 457
 458                 udelay(40);
 459         }
 460
 461         netdev_warn(dev->net, "smsc75xx_dataport_wait_not_busy timed out\n");
 462
 463         return -EIO;
 464 }
 465
 466 static int smsc75xx_dataport_write(struct usbnet *dev, u32 ram_select, u32 addr,
 467                                    u32 length, u32 *buf)
 468 {
 469         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 470         u32 dp_sel;
 471         int i, ret;
 472
 473         mutex_lock(&pdata->dataport_mutex);
 474
 475         ret = smsc75xx_dataport_wait_not_busy(dev);
 476         if (ret < 0) {
 477                 netdev_warn(dev->net, "smsc75xx_dataport_write busy on entry\n");
 478                 goto done;
 479         }
 480
 481         ret = smsc75xx_read_reg(dev, DP_SEL, &dp_sel);
 482         if (ret < 0) {
 483                 netdev_warn(dev->net, "Error reading DP_SEL\n");
 484                 goto done;
 485         }
 486
 487         dp_sel &= ~DP_SEL_RSEL;
 488         dp_sel |= ram_select;
 489         ret = smsc75xx_write_reg(dev, DP_SEL, dp_sel);
 490         if (ret < 0) {
 491                 netdev_warn(dev->net, "Error writing DP_SEL\n");
 492                 goto done;
 493         }
 494
 495         for (i = 0; i < length; i++) {
 496                 ret = smsc75xx_write_reg(dev, DP_ADDR, addr + i);
 497                 if (ret < 0) {
 498                         netdev_warn(dev->net, "Error writing DP_ADDR\n");
 499                         goto done;
 500                 }
 501
 502                 ret = smsc75xx_write_reg(dev, DP_DATA, buf[i]);
 503                 if (ret < 0) {
 504                         netdev_warn(dev->net, "Error writing DP_DATA\n");
 505                         goto done;
 506                 }
 507
 508                 ret = smsc75xx_write_reg(dev, DP_CMD, DP_CMD_WRITE);
 509                 if (ret < 0) {
 510                         netdev_warn(dev->net, "Error writing DP_CMD\n");
 511                         goto done;
 512                 }
 513
 514                 ret = smsc75xx_dataport_wait_not_busy(dev);
 515                 if (ret < 0) {
 516                         netdev_warn(dev->net, "smsc75xx_dataport_write timeout\n");
 517                         goto done;
 518                 }
 519         }
 520
 521 done:
 522         mutex_unlock(&pdata->dataport_mutex);
 523         return ret;
 524 }
 525
 526 /* returns hash bit number for given MAC address */
 527 static u32 smsc75xx_hash(char addr[ETH_ALEN])
 528 {
 529         return (ether_crc(ETH_ALEN, addr) >> 23) & 0x1ff;
 530 }
 531
 532 static void smsc75xx_deferred_multicast_write(struct work_struct *param)
 533 {
 534         struct smsc75xx_priv *pdata =
 535                 container_of(param, struct smsc75xx_priv, set_multicast);
 536         struct usbnet *dev = pdata->dev;
 537         int ret;
 538
 539         netif_dbg(dev, drv, dev->net, "deferred multicast write 0x%08x\n",
 540                   pdata->rfe_ctl);
 541
 542         smsc75xx_dataport_write(dev, DP_SEL_VHF, DP_SEL_VHF_VLAN_LEN,
 543                 DP_SEL_VHF_HASH_LEN, pdata->multicast_hash_table);
 544
 545         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 546         if (ret < 0)
 547                 netdev_warn(dev->net, "Error writing RFE_CRL\n");
 548 }
 549
 550 static void smsc75xx_set_multicast(struct net_device *netdev)
 551 {
 552         struct usbnet *dev = netdev_priv(netdev);
 553         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 554         unsigned long flags;
 555         int i;
 556
 557         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 558
 559         pdata->rfe_ctl &=
 560                 ~(RFE_CTL_AU | RFE_CTL_AM | RFE_CTL_DPF | RFE_CTL_MHF);
 561         pdata->rfe_ctl |= RFE_CTL_AB;
 562
 563         for (i = 0; i < DP_SEL_VHF_HASH_LEN; i++)
 564                 pdata->multicast_hash_table[i] = 0;
 565
 566         if (dev->net->flags & IFF_PROMISC) {
 567                 netif_dbg(dev, drv, dev->net, "promiscuous mode enabled\n");
 568                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_AU;
 569         } else if (dev->net->flags & IFF_ALLMULTI) {
 570                 netif_dbg(dev, drv, dev->net, "receive all multicast enabled\n");
 571                 pdata->rfe_ctl |= RFE_CTL_AM | RFE_CTL_DPF;
 572         } else if (!netdev_mc_empty(dev->net)) {
 573                 struct netdev_hw_addr *ha;
 574
 575                 netif_dbg(dev, drv, dev->net, "receive multicast hash filter\n");
 576
 577                 pdata->rfe_ctl |= RFE_CTL_MHF | RFE_CTL_DPF;
 578
 579                 netdev_for_each_mc_addr(ha, netdev) {
 580                         u32 bitnum = smsc75xx_hash(ha->addr);
 581                         pdata->multicast_hash_table[bitnum / 32] |=
 582                                 (1 << (bitnum % 32));
 583                 }
 584         } else {
 585                 netif_dbg(dev, drv, dev->net, "receive own packets only\n");
 586                 pdata->rfe_ctl |= RFE_CTL_DPF;
 587         }
 588
 589         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 590
 591         /* defer register writes to a sleepable context */
 592         schedule_work(&pdata->set_multicast);
 593 }
 594
 595 static int smsc75xx_update_flowcontrol(struct usbnet *dev, u8 duplex,
 596                                             u16 lcladv, u16 rmtadv)
 597 {
 598         u32 flow = 0, fct_flow = 0;
 599         int ret;
 600
 601         if (duplex == DUPLEX_FULL) {
 602                 u8 cap = mii_resolve_flowctrl_fdx(lcladv, rmtadv);
 603
 604                 if (cap & FLOW_CTRL_TX) {
 605                         flow = (FLOW_TX_FCEN | 0xFFFF);
 606                         /* set fct_flow thresholds to 20% and 80% */
 607                         fct_flow = (8 << 8) | 32;
 608                 }
 609
 610                 if (cap & FLOW_CTRL_RX)
 611                         flow |= FLOW_RX_FCEN;
 612
 613                 netif_dbg(dev, link, dev->net, "rx pause %s, tx pause %s\n",
 614                           (cap & FLOW_CTRL_RX ? "enabled" : "disabled"),
 615                           (cap & FLOW_CTRL_TX ? "enabled" : "disabled"));
 616         } else {
 617                 netif_dbg(dev, link, dev->net, "half duplex\n");
 618         }
 619
 620         ret = smsc75xx_write_reg(dev, FLOW, flow);
 621         if (ret < 0) {
 622                 netdev_warn(dev->net, "Error writing FLOW\n");
 623                 return ret;
 624         }
 625
 626         ret = smsc75xx_write_reg(dev, FCT_FLOW, fct_flow);
 627         if (ret < 0) {
 628                 netdev_warn(dev->net, "Error writing FCT_FLOW\n");
 629                 return ret;
 630         }
 631
 632         return 0;
 633 }
 634
 635 static int smsc75xx_link_reset(struct usbnet *dev)
 636 {
 637         struct mii_if_info *mii = &dev->mii;
 638         struct ethtool_cmd ecmd = { .cmd = ETHTOOL_GSET };
 639         u16 lcladv, rmtadv;
 640         int ret;
 641
 642         /* write to clear phy interrupt status */
 643         smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC,
 644                 PHY_INT_SRC_CLEAR_ALL);
 645
 646         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
 647         if (ret < 0) {
 648                 netdev_warn(dev->net, "Error writing INT_STS\n");
 649                 return ret;
 650         }
 651
 652         mii_check_media(mii, 1, 1);
 653         mii_ethtool_gset(&dev->mii, &ecmd);
 654         lcladv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_ADVERTISE);
 655         rmtadv = smsc75xx_mdio_read(dev->net, mii->phy_id, MII_LPA);
 656
 657         netif_dbg(dev, link, dev->net, "speed: %u duplex: %d lcladv: %04x rmtadv: %04x\n",
 658                   ethtool_cmd_speed(&ecmd), ecmd.duplex, lcladv, rmtadv);
 659
 660         return smsc75xx_update_flowcontrol(dev, ecmd.duplex, lcladv, rmtadv);
 661 }
 662
 663 static void smsc75xx_status(struct usbnet *dev, struct urb *urb)
 664 {
 665         u32 intdata;
 666
 667         if (urb->actual_length != 4) {
 668                 netdev_warn(dev->net, "unexpected urb length %d\n",
 669                             urb->actual_length);
 670                 return;
 671         }
 672
 673         memcpy(&intdata, urb->transfer_buffer, 4);
 674         le32_to_cpus(&intdata);
 675
 676         netif_dbg(dev, link, dev->net, "intdata: 0x%08X\n", intdata);
 677
 678         if (intdata & INT_ENP_PHY_INT)
 679                 usbnet_defer_kevent(dev, EVENT_LINK_RESET);
 680         else
 681                 netdev_warn(dev->net, "unexpected interrupt, intdata=0x%08X\n",
 682                             intdata);
 683 }
 684
 685 static int smsc75xx_ethtool_get_eeprom_len(struct net_device *net)
 686 {
 687         return MAX_EEPROM_SIZE;
 688 }
 689
 690 static int smsc75xx_ethtool_get_eeprom(struct net_device *netdev,
 691                                        struct ethtool_eeprom *ee, u8 *data)
 692 {
 693         struct usbnet *dev = netdev_priv(netdev);
 694
 695         ee->magic = LAN75XX_EEPROM_MAGIC;
 696
 697         return smsc75xx_read_eeprom(dev, ee->offset, ee->len, data);
 698 }
 699
 700 static int smsc75xx_ethtool_set_eeprom(struct net_device *netdev,
 701                                        struct ethtool_eeprom *ee, u8 *data)
 702 {
 703         struct usbnet *dev = netdev_priv(netdev);
 704
 705         if (ee->magic != LAN75XX_EEPROM_MAGIC) {
 706                 netdev_warn(dev->net, "EEPROM: magic value mismatch: 0x%x\n",
 707                             ee->magic);
 708                 return -EINVAL;
 709         }
 710
 711         return smsc75xx_write_eeprom(dev, ee->offset, ee->len, data);
 712 }
 713
 714 static void smsc75xx_ethtool_get_wol(struct net_device *net,
 715                                      struct ethtool_wolinfo *wolinfo)
 716 {
 717         struct usbnet *dev = netdev_priv(net);
 718         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 719
 720         wolinfo->supported = SUPPORTED_WAKE;
 721         wolinfo->wolopts = pdata->wolopts;
 722 }
 723
 724 static int smsc75xx_ethtool_set_wol(struct net_device *net,
 725                                     struct ethtool_wolinfo *wolinfo)
 726 {
 727         struct usbnet *dev = netdev_priv(net);
 728         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 729         int ret;
 730
 731         pdata->wolopts = wolinfo->wolopts & SUPPORTED_WAKE;
 732
 733         ret = device_set_wakeup_enable(&dev->udev->dev, pdata->wolopts);
 734         if (ret < 0)
 735                 netdev_warn(dev->net, "device_set_wakeup_enable error %d\n", ret);
 736
 737         return ret;
 738 }
 739
 740 static const struct ethtool_ops smsc75xx_ethtool_ops = {
 741         .get_link       = usbnet_get_link,
 742         .nway_reset     = usbnet_nway_reset,
 743         .get_drvinfo    = usbnet_get_drvinfo,
 744         .get_msglevel   = usbnet_get_msglevel,
 745         .set_msglevel   = usbnet_set_msglevel,
 746         .get_settings   = usbnet_get_settings,
 747         .set_settings   = usbnet_set_settings,
 748         .get_eeprom_len = smsc75xx_ethtool_get_eeprom_len,
 749         .get_eeprom     = smsc75xx_ethtool_get_eeprom,
 750         .set_eeprom     = smsc75xx_ethtool_set_eeprom,
 751         .get_wol        = smsc75xx_ethtool_get_wol,
 752         .set_wol        = smsc75xx_ethtool_set_wol,
 753 };
 754
 755 static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 756 {
 757         struct usbnet *dev = netdev_priv(netdev);
 758
 759         if (!netif_running(netdev))
 760                 return -EINVAL;
 761
 762         return generic_mii_ioctl(&dev->mii, if_mii(rq), cmd, NULL);
 763 }
 764
 765 static void smsc75xx_init_mac_address(struct usbnet *dev)
 766 {
 767         const u8 *mac_addr;
 768
 769         /* maybe the boot loader passed the MAC address in devicetree */
 770         mac_addr = of_get_mac_address(dev->udev->dev.of_node);
 771         if (mac_addr) {
 772                 memcpy(dev->net->dev_addr, mac_addr, ETH_ALEN);
 773                 return;
 774         }
 775
 776         /* try reading mac address from EEPROM */
 777         if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
 778                         dev->net->dev_addr) == 0) {
 779                 if (is_valid_ether_addr(dev->net->dev_addr)) {
 780                         /* eeprom values are valid so use them */
 781                         netif_dbg(dev, ifup, dev->net,
 782                                   "MAC address read from EEPROM\n");
 783                         return;
 784                 }
 785         }
 786
 787         /* no useful static MAC address found. generate a random one */
 788         eth_hw_addr_random(dev->net);
 789         netif_dbg(dev, ifup, dev->net, "MAC address set to eth_random_addr\n");
 790 }
 791
 792 static int smsc75xx_set_mac_address(struct usbnet *dev)
 793 {
 794         u32 addr_lo = dev->net->dev_addr[0] | dev->net->dev_addr[1] << 8 |
 795                 dev->net->dev_addr[2] << 16 | dev->net->dev_addr[3] << 24;
 796         u32 addr_hi = dev->net->dev_addr[4] | dev->net->dev_addr[5] << 8;
 797
 798         int ret = smsc75xx_write_reg(dev, RX_ADDRH, addr_hi);
 799         if (ret < 0) {
 800                 netdev_warn(dev->net, "Failed to write RX_ADDRH: %d\n", ret);
 801                 return ret;
 802         }
 803
 804         ret = smsc75xx_write_reg(dev, RX_ADDRL, addr_lo);
 805         if (ret < 0) {
 806                 netdev_warn(dev->net, "Failed to write RX_ADDRL: %d\n", ret);
 807                 return ret;
 808         }
 809
 810         addr_hi |= ADDR_FILTX_FB_VALID;
 811         ret = smsc75xx_write_reg(dev, ADDR_FILTX, addr_hi);
 812         if (ret < 0) {
 813                 netdev_warn(dev->net, "Failed to write ADDR_FILTX: %d\n", ret);
 814                 return ret;
 815         }
 816
 817         ret = smsc75xx_write_reg(dev, ADDR_FILTX + 4, addr_lo);
 818         if (ret < 0)
 819                 netdev_warn(dev->net, "Failed to write ADDR_FILTX+4: %d\n", ret);
 820
 821         return ret;
 822 }
 823
 824 static int smsc75xx_phy_initialize(struct usbnet *dev)
 825 {
 826         int bmcr, ret, timeout = 0;
 827
 828         /* Initialize MII structure */
 829         dev->mii.dev = dev->net;
 830         dev->mii.mdio_read = smsc75xx_mdio_read;
 831         dev->mii.mdio_write = smsc75xx_mdio_write;
 832         dev->mii.phy_id_mask = 0x1f;
 833         dev->mii.reg_num_mask = 0x1f;
 834         dev->mii.supports_gmii = 1;
 835         dev->mii.phy_id = SMSC75XX_INTERNAL_PHY_ID;
 836
 837         /* reset phy and wait for reset to complete */
 838         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 839
 840         do {
 841                 msleep(10);
 842                 bmcr = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, MII_BMCR);
 843                 if (bmcr < 0) {
 844                         netdev_warn(dev->net, "Error reading MII_BMCR\n");
 845                         return bmcr;
 846                 }
 847                 timeout++;
 848         } while ((bmcr & BMCR_RESET) && (timeout < 100));
 849
 850         if (timeout >= 100) {
 851                 netdev_warn(dev->net, "timeout on PHY Reset\n");
 852                 return -EIO;
 853         }
 854
 855         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_ADVERTISE,
 856                 ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP |
 857                 ADVERTISE_PAUSE_ASYM);
 858         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, MII_CTRL1000,
 859                 ADVERTISE_1000FULL);
 860
 861         /* read and write to clear phy interrupt status */
 862         ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC);
 863         if (ret < 0) {
 864                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
 865                 return ret;
 866         }
 867
 868         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff);
 869
 870         smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK,
 871                 PHY_INT_MASK_DEFAULT);
 872         mii_nway_restart(&dev->mii);
 873
 874         netif_dbg(dev, ifup, dev->net, "phy initialised successfully\n");
 875         return 0;
 876 }
 877
 878 static int smsc75xx_set_rx_max_frame_length(struct usbnet *dev, int size)
 879 {
 880         int ret = 0;
 881         u32 buf;
 882         bool rxenabled;
 883
 884         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
 885         if (ret < 0) {
 886                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
 887                 return ret;
 888         }
 889
 890         rxenabled = ((buf & MAC_RX_RXEN) != 0);
 891
 892         if (rxenabled) {
 893                 buf &= ~MAC_RX_RXEN;
 894                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 895                 if (ret < 0) {
 896                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 897                         return ret;
 898                 }
 899         }
 900
 901         /* add 4 to size for FCS */
 902         buf &= ~MAC_RX_MAX_SIZE;
 903         buf |= (((size + 4) << MAC_RX_MAX_SIZE_SHIFT) & MAC_RX_MAX_SIZE);
 904
 905         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 906         if (ret < 0) {
 907                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 908                 return ret;
 909         }
 910
 911         if (rxenabled) {
 912                 buf |= MAC_RX_RXEN;
 913                 ret = smsc75xx_write_reg(dev, MAC_RX, buf);
 914                 if (ret < 0) {
 915                         netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
 916                         return ret;
 917                 }
 918         }
 919
 920         return 0;
 921 }
 922
 923 static int smsc75xx_change_mtu(struct net_device *netdev, int new_mtu)
 924 {
 925         struct usbnet *dev = netdev_priv(netdev);
 926         int ret;
 927
 928         if (new_mtu > MAX_SINGLE_PACKET_SIZE)
 929                 return -EINVAL;
 930
 931         ret = smsc75xx_set_rx_max_frame_length(dev, new_mtu + ETH_HLEN);
 932         if (ret < 0) {
 933                 netdev_warn(dev->net, "Failed to set mac rx frame length\n");
 934                 return ret;
 935         }
 936
 937         return usbnet_change_mtu(netdev, new_mtu);
 938 }
 939
 940 /* Enable or disable Rx checksum offload engine */
 941 static int smsc75xx_set_features(struct net_device *netdev,
 942         netdev_features_t features)
 943 {
 944         struct usbnet *dev = netdev_priv(netdev);
 945         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 946         unsigned long flags;
 947         int ret;
 948
 949         spin_lock_irqsave(&pdata->rfe_ctl_lock, flags);
 950
 951         if (features & NETIF_F_RXCSUM)
 952                 pdata->rfe_ctl |= RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM;
 953         else
 954                 pdata->rfe_ctl &= ~(RFE_CTL_TCPUDP_CKM | RFE_CTL_IP_CKM);
 955
 956         spin_unlock_irqrestore(&pdata->rfe_ctl_lock, flags);
 957         /* it's racing here! */
 958
 959         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
 960         if (ret < 0)
 961                 netdev_warn(dev->net, "Error writing RFE_CTL\n");
 962
 963         return ret;
 964 }
 965
 966 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)
 967 {
 968         int timeout = 0;
 969
 970         do {
 971                 u32 buf;
 972                 int ret;
 973
 974                 ret = __smsc75xx_read_reg(dev, PMT_CTL, &buf, in_pm);
 975
 976                 if (ret < 0) {
 977                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
 978                         return ret;
 979                 }
 980
 981                 if (buf & PMT_CTL_DEV_RDY)
 982                         return 0;
 983
 984                 msleep(10);
 985                 timeout++;
 986         } while (timeout < 100);
 987
 988         netdev_warn(dev->net, "timeout waiting for device ready\n");
 989         return -EIO;
 990 }
 991
 992 static int smsc75xx_reset(struct usbnet *dev)
 993 {
 994         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
 995         u32 buf;
 996         int ret = 0, timeout;
 997
 998         netif_dbg(dev, ifup, dev->net, "entering smsc75xx_reset\n");
 999
1000         ret = smsc75xx_wait_ready(dev, 0);
1001         if (ret < 0) {
1002                 netdev_warn(dev->net, "device not ready in smsc75xx_reset\n");
1003                 return ret;
1004         }
1005
1006         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1007         if (ret < 0) {
1008                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1009                 return ret;
1010         }
1011
1012         buf |= HW_CFG_LRST;
1013
1014         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1015         if (ret < 0) {
1016                 netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1017                 return ret;
1018         }
1019
1020         timeout = 0;
1021         do {
1022                 msleep(10);
1023                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1024                 if (ret < 0) {
1025                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1026                         return ret;
1027                 }
1028                 timeout++;
1029         } while ((buf & HW_CFG_LRST) && (timeout < 100));
1030
1031         if (timeout >= 100) {
1032                 netdev_warn(dev->net, "timeout on completion of Lite Reset\n");
1033                 return -EIO;
1034         }
1035
1036         netif_dbg(dev, ifup, dev->net, "Lite reset complete, resetting PHY\n");
1037
1038         ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1039         if (ret < 0) {
1040                 netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1041                 return ret;
1042         }
1043
1044         buf |= PMT_CTL_PHY_RST;
1045
1046         ret = smsc75xx_write_reg(dev, PMT_CTL, buf);
1047         if (ret < 0) {
1048                 netdev_warn(dev->net, "Failed to write PMT_CTL: %d\n", ret);
1049                 return ret;
1050         }
1051
1052         timeout = 0;
1053         do {
1054                 msleep(10);
1055                 ret = smsc75xx_read_reg(dev, PMT_CTL, &buf);
1056                 if (ret < 0) {
1057                         netdev_warn(dev->net, "Failed to read PMT_CTL: %d\n", ret);
1058                         return ret;
1059                 }
1060                 timeout++;
1061         } while ((buf & PMT_CTL_PHY_RST) && (timeout < 100));
1062
1063         if (timeout >= 100) {
1064                 netdev_warn(dev->net, "timeout waiting for PHY Reset\n");
1065                 return -EIO;
1066         }
1067
1068         netif_dbg(dev, ifup, dev->net, "PHY reset complete\n");
1069
1070         ret = smsc75xx_set_mac_address(dev);
1071         if (ret < 0) {
1072                 netdev_warn(dev->net, "Failed to set mac address\n");
1073                 return ret;
1074         }
1075
1076         netif_dbg(dev, ifup, dev->net, "MAC Address: %pM\n",
1077                   dev->net->dev_addr);
1078
1079         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1080         if (ret < 0) {
1081                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1082                 return ret;
1083         }
1084
1085         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG : 0x%08x\n",
1086                   buf);
1087
1088         buf |= HW_CFG_BIR;
1089
1090         ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1091         if (ret < 0) {
1092                 netdev_warn(dev->net,  "Failed to write HW_CFG: %d\n", ret);
1093                 return ret;
1094         }
1095
1096         ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1097         if (ret < 0) {
1098                 netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1099                 return ret;
1100         }
1101
1102         netif_dbg(dev, ifup, dev->net, "Read Value from HW_CFG after writing HW_CFG_BIR: 0x%08x\n",
1103                   buf);
1104
1105         if (!turbo_mode) {
1106                 buf = 0;
1107                 dev->rx_urb_size = MAX_SINGLE_PACKET_SIZE;
1108         } else if (dev->udev->speed == USB_SPEED_HIGH) {
1109                 buf = DEFAULT_HS_BURST_CAP_SIZE / HS_USB_PKT_SIZE;
1110                 dev->rx_urb_size = DEFAULT_HS_BURST_CAP_SIZE;
1111         } else {
1112                 buf = DEFAULT_FS_BURST_CAP_SIZE / FS_USB_PKT_SIZE;
1113                 dev->rx_urb_size = DEFAULT_FS_BURST_CAP_SIZE;
1114         }
1115
1116         netif_dbg(dev, ifup, dev->net, "rx_urb_size=%ld\n",
1117                   (ulong)dev->rx_urb_size);
1118
1119         ret = smsc75xx_write_reg(dev, BURST_CAP, buf);
1120         if (ret < 0) {
1121                 netdev_warn(dev->net, "Failed to write BURST_CAP: %d\n", ret);
1122                 return ret;
1123         }
1124
1125         ret = smsc75xx_read_reg(dev, BURST_CAP, &buf);
1126         if (ret < 0) {
1127                 netdev_warn(dev->net, "Failed to read BURST_CAP: %d\n", ret);
1128                 return ret;
1129         }
1130
1131         netif_dbg(dev, ifup, dev->net,
1132                   "Read Value from BURST_CAP after writing: 0x%08x\n", buf);
1133
1134         ret = smsc75xx_write_reg(dev, BULK_IN_DLY, DEFAULT_BULK_IN_DELAY);
1135         if (ret < 0) {
1136                 netdev_warn(dev->net, "Failed to write BULK_IN_DLY: %d\n", ret);
1137                 return ret;
1138         }
1139
1140         ret = smsc75xx_read_reg(dev, BULK_IN_DLY, &buf);
1141         if (ret < 0) {
1142                 netdev_warn(dev->net, "Failed to read BULK_IN_DLY: %d\n", ret);
1143                 return ret;
1144         }
1145
1146         netif_dbg(dev, ifup, dev->net,
1147                   "Read Value from BULK_IN_DLY after writing: 0x%08x\n", buf);
1148
1149         if (turbo_mode) {
1150                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1151                 if (ret < 0) {
1152                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1153                         return ret;
1154                 }
1155
1156                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1157
1158                 buf |= (HW_CFG_MEF | HW_CFG_BCE);
1159
1160                 ret = smsc75xx_write_reg(dev, HW_CFG, buf);
1161                 if (ret < 0) {
1162                         netdev_warn(dev->net, "Failed to write HW_CFG: %d\n", ret);
1163                         return ret;
1164                 }
1165
1166                 ret = smsc75xx_read_reg(dev, HW_CFG, &buf);
1167                 if (ret < 0) {
1168                         netdev_warn(dev->net, "Failed to read HW_CFG: %d\n", ret);
1169                         return ret;
1170                 }
1171
1172                 netif_dbg(dev, ifup, dev->net, "HW_CFG: 0x%08x\n", buf);
1173         }
1174
1175         /* set FIFO sizes */
1176         buf = (MAX_RX_FIFO_SIZE - 512) / 512;
1177         ret = smsc75xx_write_reg(dev, FCT_RX_FIFO_END, buf);
1178         if (ret < 0) {
1179                 netdev_warn(dev->net, "Failed to write FCT_RX_FIFO_END: %d\n", ret);
1180                 return ret;
1181         }
1182
1183         netif_dbg(dev, ifup, dev->net, "FCT_RX_FIFO_END set to 0x%08x\n", buf);
1184
1185         buf = (MAX_TX_FIFO_SIZE - 512) / 512;
1186         ret = smsc75xx_write_reg(dev, FCT_TX_FIFO_END, buf);
1187         if (ret < 0) {
1188                 netdev_warn(dev->net, "Failed to write FCT_TX_FIFO_END: %d\n", ret);
1189                 return ret;
1190         }
1191
1192         netif_dbg(dev, ifup, dev->net, "FCT_TX_FIFO_END set to 0x%08x\n", buf);
1193
1194         ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL);
1195         if (ret < 0) {
1196                 netdev_warn(dev->net, "Failed to write INT_STS: %d\n", ret);
1197                 return ret;
1198         }
1199
1200         ret = smsc75xx_read_reg(dev, ID_REV, &buf);
1201         if (ret < 0) {
1202                 netdev_warn(dev->net, "Failed to read ID_REV: %d\n", ret);
1203                 return ret;
1204         }
1205
1206         netif_dbg(dev, ifup, dev->net, "ID_REV = 0x%08x\n", buf);
1207
1208         ret = smsc75xx_read_reg(dev, E2P_CMD, &buf);
1209         if (ret < 0) {
1210                 netdev_warn(dev->net, "Failed to read E2P_CMD: %d\n", ret);
1211                 return ret;
1212         }
1213
1214         /* only set default GPIO/LED settings if no EEPROM is detected */
1215         if (!(buf & E2P_CMD_LOADED)) {
1216                 ret = smsc75xx_read_reg(dev, LED_GPIO_CFG, &buf);
1217                 if (ret < 0) {
1218                         netdev_warn(dev->net, "Failed to read LED_GPIO_CFG: %d\n", ret);
1219                         return ret;
1220                 }
1221
1222                 buf &= ~(LED_GPIO_CFG_LED2_FUN_SEL | LED_GPIO_CFG_LED10_FUN_SEL);
1223                 buf |= LED_GPIO_CFG_LEDGPIO_EN | LED_GPIO_CFG_LED2_FUN_SEL;
1224
1225                 ret = smsc75xx_write_reg(dev, LED_GPIO_CFG, buf);
1226                 if (ret < 0) {
1227                         netdev_warn(dev->net, "Failed to write LED_GPIO_CFG: %d\n", ret);
1228                         return ret;
1229                 }
1230         }
1231
1232         ret = smsc75xx_write_reg(dev, FLOW, 0);
1233         if (ret < 0) {
1234                 netdev_warn(dev->net, "Failed to write FLOW: %d\n", ret);
1235                 return ret;
1236         }
1237
1238         ret = smsc75xx_write_reg(dev, FCT_FLOW, 0);
1239         if (ret < 0) {
1240                 netdev_warn(dev->net, "Failed to write FCT_FLOW: %d\n", ret);
1241                 return ret;
1242         }
1243
1244         /* Don't need rfe_ctl_lock during initialisation */
1245         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1246         if (ret < 0) {
1247                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1248                 return ret;
1249         }
1250
1251         pdata->rfe_ctl |= RFE_CTL_AB | RFE_CTL_DPF;
1252
1253         ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
1254         if (ret < 0) {
1255                 netdev_warn(dev->net, "Failed to write RFE_CTL: %d\n", ret);
1256                 return ret;
1257         }
1258
1259         ret = smsc75xx_read_reg(dev, RFE_CTL, &pdata->rfe_ctl);
1260         if (ret < 0) {
1261                 netdev_warn(dev->net, "Failed to read RFE_CTL: %d\n", ret);
1262                 return ret;
1263         }
1264
1265         netif_dbg(dev, ifup, dev->net, "RFE_CTL set to 0x%08x\n",
1266                   pdata->rfe_ctl);
1267
1268         /* Enable or disable checksum offload engines */
1269         smsc75xx_set_features(dev->net, dev->net->features);
1270
1271         smsc75xx_set_multicast(dev->net);
1272
1273         ret = smsc75xx_phy_initialize(dev);
1274         if (ret < 0) {
1275                 netdev_warn(dev->net, "Failed to initialize PHY: %d\n", ret);
1276                 return ret;
1277         }
1278
1279         ret = smsc75xx_read_reg(dev, INT_EP_CTL, &buf);
1280         if (ret < 0) {
1281                 netdev_warn(dev->net, "Failed to read INT_EP_CTL: %d\n", ret);
1282                 return ret;
1283         }
1284
1285         /* enable PHY interrupts */
1286         buf |= INT_ENP_PHY_INT;
1287
1288         ret = smsc75xx_write_reg(dev, INT_EP_CTL, buf);
1289         if (ret < 0) {
1290                 netdev_warn(dev->net, "Failed to write INT_EP_CTL: %d\n", ret);
1291                 return ret;
1292         }
1293
1294         /* allow mac to detect speed and duplex from phy */
1295         ret = smsc75xx_read_reg(dev, MAC_CR, &buf);
1296         if (ret < 0) {
1297                 netdev_warn(dev->net, "Failed to read MAC_CR: %d\n", ret);
1298                 return ret;
1299         }
1300
1301         buf |= (MAC_CR_ADD | MAC_CR_ASD);
1302         ret = smsc75xx_write_reg(dev, MAC_CR, buf);
1303         if (ret < 0) {
1304                 netdev_warn(dev->net, "Failed to write MAC_CR: %d\n", ret);
1305                 return ret;
1306         }
1307
1308         ret = smsc75xx_read_reg(dev, MAC_TX, &buf);
1309         if (ret < 0) {
1310                 netdev_warn(dev->net, "Failed to read MAC_TX: %d\n", ret);
1311                 return ret;
1312         }
1313
1314         buf |= MAC_TX_TXEN;
1315
1316         ret = smsc75xx_write_reg(dev, MAC_TX, buf);
1317         if (ret < 0) {
1318                 netdev_warn(dev->net, "Failed to write MAC_TX: %d\n", ret);
1319                 return ret;
1320         }
1321
1322         netif_dbg(dev, ifup, dev->net, "MAC_TX set to 0x%08x\n", buf);
1323
1324         ret = smsc75xx_read_reg(dev, FCT_TX_CTL, &buf);
1325         if (ret < 0) {
1326                 netdev_warn(dev->net, "Failed to read FCT_TX_CTL: %d\n", ret);
1327                 return ret;
1328         }
1329
1330         buf |= FCT_TX_CTL_EN;
1331
1332         ret = smsc75xx_write_reg(dev, FCT_TX_CTL, buf);
1333         if (ret < 0) {
1334                 netdev_warn(dev->net, "Failed to write FCT_TX_CTL: %d\n", ret);
1335                 return ret;
1336         }
1337
1338         netif_dbg(dev, ifup, dev->net, "FCT_TX_CTL set to 0x%08x\n", buf);
1339
1340         ret = smsc75xx_set_rx_max_frame_length(dev, dev->net->mtu + ETH_HLEN);
1341         if (ret < 0) {
1342                 netdev_warn(dev->net, "Failed to set max rx frame length\n");
1343                 return ret;
1344         }
1345
1346         ret = smsc75xx_read_reg(dev, MAC_RX, &buf);
1347         if (ret < 0) {
1348                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
1349                 return ret;
1350         }
1351
1352         buf |= MAC_RX_RXEN;
1353
1354         ret = smsc75xx_write_reg(dev, MAC_RX, buf);
1355         if (ret < 0) {
1356                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
1357                 return ret;
1358         }
1359
1360         netif_dbg(dev, ifup, dev->net, "MAC_RX set to 0x%08x\n", buf);
1361
1362         ret = smsc75xx_read_reg(dev, FCT_RX_CTL, &buf);
1363         if (ret < 0) {
1364                 netdev_warn(dev->net, "Failed to read FCT_RX_CTL: %d\n", ret);
1365                 return ret;
1366         }
1367
1368         buf |= FCT_RX_CTL_EN;
1369
1370         ret = smsc75xx_write_reg(dev, FCT_RX_CTL, buf);
1371         if (ret < 0) {
1372                 netdev_warn(dev->net, "Failed to write FCT_RX_CTL: %d\n", ret);
1373                 return ret;
1374         }
1375
1376         netif_dbg(dev, ifup, dev->net, "FCT_RX_CTL set to 0x%08x\n", buf);
1377
1378         netif_dbg(dev, ifup, dev->net, "smsc75xx_reset, return 0\n");
1379         return 0;
1380 }
1381
1382 static const struct net_device_ops smsc75xx_netdev_ops = {
1383         .ndo_open               = usbnet_open,
1384         .ndo_stop               = usbnet_stop,
1385         .ndo_start_xmit         = usbnet_start_xmit,
1386         .ndo_tx_timeout         = usbnet_tx_timeout,
1387         .ndo_change_mtu         = smsc75xx_change_mtu,
1388         .ndo_set_mac_address    = eth_mac_addr,
1389         .ndo_validate_addr      = eth_validate_addr,
1390         .ndo_do_ioctl           = smsc75xx_ioctl,
1391         .ndo_set_rx_mode        = smsc75xx_set_multicast,
1392         .ndo_set_features       = smsc75xx_set_features,
1393 };
1394
1395 static int smsc75xx_bind(struct usbnet *dev, struct usb_interface *intf)
1396 {
1397         struct smsc75xx_priv *pdata = NULL;
1398         int ret;
1399
1400         printk(KERN_INFO SMSC_CHIPNAME " v" SMSC_DRIVER_VERSION "\n");
1401
1402         ret = usbnet_get_endpoints(dev, intf);
1403         if (ret < 0) {
1404                 netdev_warn(dev->net, "usbnet_get_endpoints failed: %d\n", ret);
1405                 return ret;
1406         }
1407
1408         dev->data[0] = (unsigned long)kzalloc(sizeof(struct smsc75xx_priv),
1409                                               GFP_KERNEL);
1410
1411         pdata = (struct smsc75xx_priv *)(dev->data[0]);
1412         if (!pdata)
1413                 return -ENOMEM;
1414
1415         pdata->dev = dev;
1416
1417         spin_lock_init(&pdata->rfe_ctl_lock);
1418         mutex_init(&pdata->dataport_mutex);
1419
1420         INIT_WORK(&pdata->set_multicast, smsc75xx_deferred_multicast_write);
1421
1422         if (DEFAULT_TX_CSUM_ENABLE)
1423                 dev->net->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
1424
1425         if (DEFAULT_RX_CSUM_ENABLE)
1426                 dev->net->features |= NETIF_F_RXCSUM;
1427
1428         dev->net->hw_features = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1429                                 NETIF_F_RXCSUM;
1430
1431         ret = smsc75xx_wait_ready(dev, 0);
1432         if (ret < 0) {
1433                 netdev_warn(dev->net, "device not ready in smsc75xx_bind\n");
1434                 return ret;
1435         }
1436
1437         smsc75xx_init_mac_address(dev);
1438
1439         /* Init all registers */
1440         ret = smsc75xx_reset(dev);
1441         if (ret < 0) {
1442                 netdev_warn(dev->net, "smsc75xx_reset error %d\n", ret);
1443                 return ret;
1444         }
1445
1446         dev->net->netdev_ops = &smsc75xx_netdev_ops;
1447         dev->net->ethtool_ops = &smsc75xx_ethtool_ops;
1448         dev->net->flags |= IFF_MULTICAST;
1449         dev->net->hard_header_len += SMSC75XX_TX_OVERHEAD;
1450         dev->hard_mtu = dev->net->mtu + dev->net->hard_header_len;
1451         return 0;
1452 }
1453
1454 static void smsc75xx_unbind(struct usbnet *dev, struct usb_interface *intf)
1455 {
1456         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1457         if (pdata) {
1458                 netif_dbg(dev, ifdown, dev->net, "free pdata\n");
1459                 kfree(pdata);
1460                 pdata = NULL;
1461                 dev->data[0] = 0;
1462         }
1463 }
1464
1465 static u16 smsc_crc(const u8 *buffer, size_t len)
1466 {
1467         return bitrev16(crc16(0xFFFF, buffer, len));
1468 }
1469
1470 static int smsc75xx_write_wuff(struct usbnet *dev, int filter, u32 wuf_cfg,
1471                                u32 wuf_mask1)
1472 {
1473         int cfg_base = WUF_CFGX + filter * 4;
1474         int mask_base = WUF_MASKX + filter * 16;
1475         int ret;
1476
1477         ret = smsc75xx_write_reg(dev, cfg_base, wuf_cfg);
1478         if (ret < 0) {
1479                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1480                 return ret;
1481         }
1482
1483         ret = smsc75xx_write_reg(dev, mask_base, wuf_mask1);
1484         if (ret < 0) {
1485                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1486                 return ret;
1487         }
1488
1489         ret = smsc75xx_write_reg(dev, mask_base + 4, 0);
1490         if (ret < 0) {
1491                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1492                 return ret;
1493         }
1494
1495         ret = smsc75xx_write_reg(dev, mask_base + 8, 0);
1496         if (ret < 0) {
1497                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1498                 return ret;
1499         }
1500
1501         ret = smsc75xx_write_reg(dev, mask_base + 12, 0);
1502         if (ret < 0) {
1503                 netdev_warn(dev->net, "Error writing WUF_MASKX\n");
1504                 return ret;
1505         }
1506
1507         return 0;
1508 }
1509
1510 static int smsc75xx_enter_suspend0(struct usbnet *dev)
1511 {
1512         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1513         u32 val;
1514         int ret;
1515
1516         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1517         if (ret < 0) {
1518                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1519                 return ret;
1520         }
1521
1522         val &= (~(PMT_CTL_SUS_MODE | PMT_CTL_PHY_RST));
1523         val |= PMT_CTL_SUS_MODE_0 | PMT_CTL_WOL_EN | PMT_CTL_WUPS;
1524
1525         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1526         if (ret < 0) {
1527                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1528                 return ret;
1529         }
1530
1531         pdata->suspend_flags |= SUSPEND_SUSPEND0;
1532
1533         return 0;
1534 }
1535
1536 static int smsc75xx_enter_suspend1(struct usbnet *dev)
1537 {
1538         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1539         u32 val;
1540         int ret;
1541
1542         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1543         if (ret < 0) {
1544                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1545                 return ret;
1546         }
1547
1548         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1549         val |= PMT_CTL_SUS_MODE_1;
1550
1551         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1552         if (ret < 0) {
1553                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1554                 return ret;
1555         }
1556
1557         /* clear wol status, enable energy detection */
1558         val &= ~PMT_CTL_WUPS;
1559         val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1560
1561         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1562         if (ret < 0) {
1563                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1564                 return ret;
1565         }
1566
1567         pdata->suspend_flags |= SUSPEND_SUSPEND1;
1568
1569         return 0;
1570 }
1571
1572 static int smsc75xx_enter_suspend2(struct usbnet *dev)
1573 {
1574         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1575         u32 val;
1576         int ret;
1577
1578         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1579         if (ret < 0) {
1580                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1581                 return ret;
1582         }
1583
1584         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1585         val |= PMT_CTL_SUS_MODE_2;
1586
1587         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1588         if (ret < 0) {
1589                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1590                 return ret;
1591         }
1592
1593         pdata->suspend_flags |= SUSPEND_SUSPEND2;
1594
1595         return 0;
1596 }
1597
1598 static int smsc75xx_enter_suspend3(struct usbnet *dev)
1599 {
1600         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1601         u32 val;
1602         int ret;
1603
1604         ret = smsc75xx_read_reg_nopm(dev, FCT_RX_CTL, &val);
1605         if (ret < 0) {
1606                 netdev_warn(dev->net, "Error reading FCT_RX_CTL\n");
1607                 return ret;
1608         }
1609
1610         if (val & FCT_RX_CTL_RXUSED) {
1611                 netdev_dbg(dev->net, "rx fifo not empty in autosuspend\n");
1612                 return -EBUSY;
1613         }
1614
1615         ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1616         if (ret < 0) {
1617                 netdev_warn(dev->net, "Error reading PMT_CTL\n");
1618                 return ret;
1619         }
1620
1621         val &= ~(PMT_CTL_SUS_MODE | PMT_CTL_WUPS | PMT_CTL_PHY_RST);
1622         val |= PMT_CTL_SUS_MODE_3 | PMT_CTL_RES_CLR_WKP_EN;
1623
1624         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1625         if (ret < 0) {
1626                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1627                 return ret;
1628         }
1629
1630         /* clear wol status */
1631         val &= ~PMT_CTL_WUPS;
1632         val |= PMT_CTL_WUPS_WOL;
1633
1634         ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1635         if (ret < 0) {
1636                 netdev_warn(dev->net, "Error writing PMT_CTL\n");
1637                 return ret;
1638         }
1639
1640         pdata->suspend_flags |= SUSPEND_SUSPEND3;
1641
1642         return 0;
1643 }
1644
1645 static int smsc75xx_enable_phy_wakeup_interrupts(struct usbnet *dev, u16 mask)
1646 {
1647         struct mii_if_info *mii = &dev->mii;
1648         int ret;
1649
1650         netdev_dbg(dev->net, "enabling PHY wakeup interrupts\n");
1651
1652         /* read to clear */
1653         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_SRC);
1654         if (ret < 0) {
1655                 netdev_warn(dev->net, "Error reading PHY_INT_SRC\n");
1656                 return ret;
1657         }
1658
1659         /* enable interrupt source */
1660         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, PHY_INT_MASK);
1661         if (ret < 0) {
1662                 netdev_warn(dev->net, "Error reading PHY_INT_MASK\n");
1663                 return ret;
1664         }
1665
1666         ret |= mask;
1667
1668         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id, PHY_INT_MASK, ret);
1669
1670         return 0;
1671 }
1672
1673 static int smsc75xx_link_ok_nopm(struct usbnet *dev)
1674 {
1675         struct mii_if_info *mii = &dev->mii;
1676         int ret;
1677
1678         /* first, a dummy read, needed to latch some MII phys */
1679         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1680         if (ret < 0) {
1681                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1682                 return ret;
1683         }
1684
1685         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id, MII_BMSR);
1686         if (ret < 0) {
1687                 netdev_warn(dev->net, "Error reading MII_BMSR\n");
1688                 return ret;
1689         }
1690
1691         return !!(ret & BMSR_LSTATUS);
1692 }
1693
1694 static int smsc75xx_autosuspend(struct usbnet *dev, u32 link_up)
1695 {
1696         int ret;
1697
1698         if (!netif_running(dev->net)) {
1699                 /* interface is ifconfig down so fully power down hw */
1700                 netdev_dbg(dev->net, "autosuspend entering SUSPEND2\n");
1701                 return smsc75xx_enter_suspend2(dev);
1702         }
1703
1704         if (!link_up) {
1705                 /* link is down so enter EDPD mode */
1706                 netdev_dbg(dev->net, "autosuspend entering SUSPEND1\n");
1707
1708                 /* enable PHY wakeup events for if cable is attached */
1709                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1710                         PHY_INT_MASK_ANEG_COMP);
1711                 if (ret < 0) {
1712                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1713                         return ret;
1714                 }
1715
1716                 netdev_info(dev->net, "entering SUSPEND1 mode\n");
1717                 return smsc75xx_enter_suspend1(dev);
1718         }
1719
1720         /* enable PHY wakeup events so we remote wakeup if cable is pulled */
1721         ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1722                 PHY_INT_MASK_LINK_DOWN);
1723         if (ret < 0) {
1724                 netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1725                 return ret;
1726         }
1727
1728         netdev_dbg(dev->net, "autosuspend entering SUSPEND3\n");
1729         return smsc75xx_enter_suspend3(dev);
1730 }
1731
1732 static int smsc75xx_suspend(struct usb_interface *intf, pm_message_t message)
1733 {
1734         struct usbnet *dev = usb_get_intfdata(intf);
1735         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
1736         u32 val, link_up;
1737         int ret;
1738
1739         ret = usbnet_suspend(intf, message);
1740         if (ret < 0) {
1741                 netdev_warn(dev->net, "usbnet_suspend error\n");
1742                 return ret;
1743         }
1744
1745         if (pdata->suspend_flags) {
1746                 netdev_warn(dev->net, "error during last resume\n");
1747                 pdata->suspend_flags = 0;
1748         }
1749
1750         /* determine if link is up using only _nopm functions */
1751         link_up = smsc75xx_link_ok_nopm(dev);
1752
1753         if (message.event == PM_EVENT_AUTO_SUSPEND) {
1754                 ret = smsc75xx_autosuspend(dev, link_up);
1755                 goto done;
1756         }
1757
1758         /* if we get this far we're not autosuspending */
1759         /* if no wol options set, or if link is down and we're not waking on
1760          * PHY activity, enter lowest power SUSPEND2 mode
1761          */
1762         if (!(pdata->wolopts & SUPPORTED_WAKE) ||
1763                 !(link_up || (pdata->wolopts & WAKE_PHY))) {
1764                 netdev_info(dev->net, "entering SUSPEND2 mode\n");
1765
1766                 /* disable energy detect (link up) & wake up events */
1767                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1768                 if (ret < 0) {
1769                         netdev_warn(dev->net, "Error reading WUCSR\n");
1770                         goto done;
1771                 }
1772
1773                 val &= ~(WUCSR_MPEN | WUCSR_WUEN);
1774
1775                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1776                 if (ret < 0) {
1777                         netdev_warn(dev->net, "Error writing WUCSR\n");
1778                         goto done;
1779                 }
1780
1781                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1782                 if (ret < 0) {
1783                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1784                         goto done;
1785                 }
1786
1787                 val &= ~(PMT_CTL_ED_EN | PMT_CTL_WOL_EN);
1788
1789                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1790                 if (ret < 0) {
1791                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1792                         goto done;
1793                 }
1794
1795                 ret = smsc75xx_enter_suspend2(dev);
1796                 goto done;
1797         }
1798
1799         if (pdata->wolopts & WAKE_PHY) {
1800                 ret = smsc75xx_enable_phy_wakeup_interrupts(dev,
1801                         (PHY_INT_MASK_ANEG_COMP | PHY_INT_MASK_LINK_DOWN));
1802                 if (ret < 0) {
1803                         netdev_warn(dev->net, "error enabling PHY wakeup ints\n");
1804                         goto done;
1805                 }
1806
1807                 /* if link is down then configure EDPD and enter SUSPEND1,
1808                  * otherwise enter SUSPEND0 below
1809                  */
1810                 if (!link_up) {
1811                         struct mii_if_info *mii = &dev->mii;
1812                         netdev_info(dev->net, "entering SUSPEND1 mode\n");
1813
1814                         /* enable energy detect power-down mode */
1815                         ret = smsc75xx_mdio_read_nopm(dev->net, mii->phy_id,
1816                                 PHY_MODE_CTRL_STS);
1817                         if (ret < 0) {
1818                                 netdev_warn(dev->net, "Error reading PHY_MODE_CTRL_STS\n");
1819                                 goto done;
1820                         }
1821
1822                         ret |= MODE_CTRL_STS_EDPWRDOWN;
1823
1824                         smsc75xx_mdio_write_nopm(dev->net, mii->phy_id,
1825                                 PHY_MODE_CTRL_STS, ret);
1826
1827                         /* enter SUSPEND1 mode */
1828                         ret = smsc75xx_enter_suspend1(dev);
1829                         goto done;
1830                 }
1831         }
1832
1833         if (pdata->wolopts & (WAKE_MCAST | WAKE_ARP)) {
1834                 int i, filter = 0;
1835
1836                 /* disable all filters */
1837                 for (i = 0; i < WUF_NUM; i++) {
1838                         ret = smsc75xx_write_reg_nopm(dev, WUF_CFGX + i * 4, 0);
1839                         if (ret < 0) {
1840                                 netdev_warn(dev->net, "Error writing WUF_CFGX\n");
1841                                 goto done;
1842                         }
1843                 }
1844
1845                 if (pdata->wolopts & WAKE_MCAST) {
1846                         const u8 mcast[] = {0x01, 0x00, 0x5E};
1847                         netdev_info(dev->net, "enabling multicast detection\n");
1848
1849                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_MULTICAST
1850                                 | smsc_crc(mcast, 3);
1851                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0007);
1852                         if (ret < 0) {
1853                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1854                                 goto done;
1855                         }
1856                 }
1857
1858                 if (pdata->wolopts & WAKE_ARP) {
1859                         const u8 arp[] = {0x08, 0x06};
1860                         netdev_info(dev->net, "enabling ARP detection\n");
1861
1862                         val = WUF_CFGX_EN | WUF_CFGX_ATYPE_ALL | (0x0C << 16)
1863                                 | smsc_crc(arp, 2);
1864                         ret = smsc75xx_write_wuff(dev, filter++, val, 0x0003);
1865                         if (ret < 0) {
1866                                 netdev_warn(dev->net, "Error writing wakeup filter\n");
1867                                 goto done;
1868                         }
1869                 }
1870
1871                 /* clear any pending pattern match packet status */
1872                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1873                 if (ret < 0) {
1874                         netdev_warn(dev->net, "Error reading WUCSR\n");
1875                         goto done;
1876                 }
1877
1878                 val |= WUCSR_WUFR;
1879
1880                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1881                 if (ret < 0) {
1882                         netdev_warn(dev->net, "Error writing WUCSR\n");
1883                         goto done;
1884                 }
1885
1886                 netdev_info(dev->net, "enabling packet match detection\n");
1887                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1888                 if (ret < 0) {
1889                         netdev_warn(dev->net, "Error reading WUCSR\n");
1890                         goto done;
1891                 }
1892
1893                 val |= WUCSR_WUEN;
1894
1895                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1896                 if (ret < 0) {
1897                         netdev_warn(dev->net, "Error writing WUCSR\n");
1898                         goto done;
1899                 }
1900         } else {
1901                 netdev_info(dev->net, "disabling packet match detection\n");
1902                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1903                 if (ret < 0) {
1904                         netdev_warn(dev->net, "Error reading WUCSR\n");
1905                         goto done;
1906                 }
1907
1908                 val &= ~WUCSR_WUEN;
1909
1910                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1911                 if (ret < 0) {
1912                         netdev_warn(dev->net, "Error writing WUCSR\n");
1913                         goto done;
1914                 }
1915         }
1916
1917         /* disable magic, bcast & unicast wakeup sources */
1918         ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1919         if (ret < 0) {
1920                 netdev_warn(dev->net, "Error reading WUCSR\n");
1921                 goto done;
1922         }
1923
1924         val &= ~(WUCSR_MPEN | WUCSR_BCST_EN | WUCSR_PFDA_EN);
1925
1926         ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1927         if (ret < 0) {
1928                 netdev_warn(dev->net, "Error writing WUCSR\n");
1929                 goto done;
1930         }
1931
1932         if (pdata->wolopts & WAKE_PHY) {
1933                 netdev_info(dev->net, "enabling PHY wakeup\n");
1934
1935                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
1936                 if (ret < 0) {
1937                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
1938                         goto done;
1939                 }
1940
1941                 /* clear wol status, enable energy detection */
1942                 val &= ~PMT_CTL_WUPS;
1943                 val |= (PMT_CTL_WUPS_ED | PMT_CTL_ED_EN);
1944
1945                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
1946                 if (ret < 0) {
1947                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
1948                         goto done;
1949                 }
1950         }
1951
1952         if (pdata->wolopts & WAKE_MAGIC) {
1953                 netdev_info(dev->net, "enabling magic packet wakeup\n");
1954                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1955                 if (ret < 0) {
1956                         netdev_warn(dev->net, "Error reading WUCSR\n");
1957                         goto done;
1958                 }
1959
1960                 /* clear any pending magic packet status */
1961                 val |= WUCSR_MPR | WUCSR_MPEN;
1962
1963                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1964                 if (ret < 0) {
1965                         netdev_warn(dev->net, "Error writing WUCSR\n");
1966                         goto done;
1967                 }
1968         }
1969
1970         if (pdata->wolopts & WAKE_BCAST) {
1971                 netdev_info(dev->net, "enabling broadcast detection\n");
1972                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1973                 if (ret < 0) {
1974                         netdev_warn(dev->net, "Error reading WUCSR\n");
1975                         goto done;
1976                 }
1977
1978                 val |= WUCSR_BCAST_FR | WUCSR_BCST_EN;
1979
1980                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1981                 if (ret < 0) {
1982                         netdev_warn(dev->net, "Error writing WUCSR\n");
1983                         goto done;
1984                 }
1985         }
1986
1987         if (pdata->wolopts & WAKE_UCAST) {
1988                 netdev_info(dev->net, "enabling unicast detection\n");
1989                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
1990                 if (ret < 0) {
1991                         netdev_warn(dev->net, "Error reading WUCSR\n");
1992                         goto done;
1993                 }
1994
1995                 val |= WUCSR_WUFR | WUCSR_PFDA_EN;
1996
1997                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
1998                 if (ret < 0) {
1999                         netdev_warn(dev->net, "Error writing WUCSR\n");
2000                         goto done;
2001                 }
2002         }
2003
2004         /* enable receiver to enable frame reception */
2005         ret = smsc75xx_read_reg_nopm(dev, MAC_RX, &val);
2006         if (ret < 0) {
2007                 netdev_warn(dev->net, "Failed to read MAC_RX: %d\n", ret);
2008                 goto done;
2009         }
2010
2011         val |= MAC_RX_RXEN;
2012
2013         ret = smsc75xx_write_reg_nopm(dev, MAC_RX, val);
2014         if (ret < 0) {
2015                 netdev_warn(dev->net, "Failed to write MAC_RX: %d\n", ret);
2016                 goto done;
2017         }
2018
2019         /* some wol options are enabled, so enter SUSPEND0 */
2020         netdev_info(dev->net, "entering SUSPEND0 mode\n");
2021         ret = smsc75xx_enter_suspend0(dev);
2022
2023 done:
2024         /*
2025          * TODO: resume() might need to handle the suspend failure
2026          * in system sleep
2027          */
2028         if (ret && PMSG_IS_AUTO(message))
2029                 usbnet_resume(intf);
2030         return ret;
2031 }
2032
2033 static int smsc75xx_resume(struct usb_interface *intf)
2034 {
2035         struct usbnet *dev = usb_get_intfdata(intf);
2036         struct smsc75xx_priv *pdata = (struct smsc75xx_priv *)(dev->data[0]);
2037         u8 suspend_flags = pdata->suspend_flags;
2038         int ret;
2039         u32 val;
2040
2041         netdev_dbg(dev->net, "resume suspend_flags=0x%02x\n", suspend_flags);
2042
2043         /* do this first to ensure it's cleared even in error case */
2044         pdata->suspend_flags = 0;
2045
2046         if (suspend_flags & SUSPEND_ALLMODES) {
2047                 /* Disable wakeup sources */
2048                 ret = smsc75xx_read_reg_nopm(dev, WUCSR, &val);
2049                 if (ret < 0) {
2050                         netdev_warn(dev->net, "Error reading WUCSR\n");
2051                         return ret;
2052                 }
2053
2054                 val &= ~(WUCSR_WUEN | WUCSR_MPEN | WUCSR_PFDA_EN
2055                         | WUCSR_BCST_EN);
2056
2057                 ret = smsc75xx_write_reg_nopm(dev, WUCSR, val);
2058                 if (ret < 0) {
2059                         netdev_warn(dev->net, "Error writing WUCSR\n");
2060                         return ret;
2061                 }
2062
2063                 /* clear wake-up status */
2064                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2065                 if (ret < 0) {
2066                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2067                         return ret;
2068                 }
2069
2070                 val &= ~PMT_CTL_WOL_EN;
2071                 val |= PMT_CTL_WUPS;
2072
2073                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2074                 if (ret < 0) {
2075                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2076                         return ret;
2077                 }
2078         }
2079
2080         if (suspend_flags & SUSPEND_SUSPEND2) {
2081                 netdev_info(dev->net, "resuming from SUSPEND2\n");
2082
2083                 ret = smsc75xx_read_reg_nopm(dev, PMT_CTL, &val);
2084                 if (ret < 0) {
2085                         netdev_warn(dev->net, "Error reading PMT_CTL\n");
2086                         return ret;
2087                 }
2088
2089                 val |= PMT_CTL_PHY_PWRUP;
2090
2091                 ret = smsc75xx_write_reg_nopm(dev, PMT_CTL, val);
2092                 if (ret < 0) {
2093                         netdev_warn(dev->net, "Error writing PMT_CTL\n");
2094                         return ret;
2095                 }
2096         }
2097
2098         ret = smsc75xx_wait_ready(dev, 1);
2099         if (ret < 0) {
2100                 netdev_warn(dev->net, "device not ready in smsc75xx_resume\n");
2101                 return ret;
2102         }
2103
2104         return usbnet_resume(intf);
2105 }
2106
2107 static void smsc75xx_rx_csum_offload(struct usbnet *dev, struct sk_buff *skb,
2108                                      u32 rx_cmd_a, u32 rx_cmd_b)
2109 {
2110         if (!(dev->net->features & NETIF_F_RXCSUM) ||
2111             unlikely(rx_cmd_a & RX_CMD_A_LCSM)) {
2112                 skb->ip_summed = CHECKSUM_NONE;
2113         } else {
2114                 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT));
2115                 skb->ip_summed = CHECKSUM_COMPLETE;
2116         }
2117 }
2118
2119 static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
2120 {
2121         /* This check is no longer done by usbnet */
2122         if (skb->len < dev->net->hard_header_len)
2123                 return 0;
2124
2125         while (skb->len > 0) {
2126                 u32 rx_cmd_a, rx_cmd_b, align_count, size;
2127                 struct sk_buff *ax_skb;
2128                 unsigned char *packet;
2129
2130                 memcpy(&rx_cmd_a, skb->data, sizeof(rx_cmd_a));
2131                 le32_to_cpus(&rx_cmd_a);
2132                 skb_pull(skb, 4);
2133
2134                 memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b));
2135                 le32_to_cpus(&rx_cmd_b);
2136                 skb_pull(skb, 4 + RXW_PADDING);
2137
2138                 packet = skb->data;
2139
2140                 /* get the packet length */
2141                 size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING;
2142                 align_count = (4 - ((size + RXW_PADDING) % 4)) % 4;
2143
2144                 if (unlikely(rx_cmd_a & RX_CMD_A_RED)) {
2145                         netif_dbg(dev, rx_err, dev->net,
2146                                   "Error rx_cmd_a=0x%08x\n", rx_cmd_a);
2147                         dev->net->stats.rx_errors++;
2148                         dev->net->stats.rx_dropped++;
2149
2150                         if (rx_cmd_a & RX_CMD_A_FCS)
2151                                 dev->net->stats.rx_crc_errors++;
2152                         else if (rx_cmd_a & (RX_CMD_A_LONG | RX_CMD_A_RUNT))
2153                                 dev->net->stats.rx_frame_errors++;
2154                 } else {
2155                         /* MAX_SINGLE_PACKET_SIZE + 4(CRC) + 2(COE) + 4(Vlan) */
2156                         if (unlikely(size > (MAX_SINGLE_PACKET_SIZE + ETH_HLEN + 12))) {
2157                                 netif_dbg(dev, rx_err, dev->net,
2158                                           "size err rx_cmd_a=0x%08x\n",
2159                                           rx_cmd_a);
2160                                 return 0;
2161                         }
2162
2163                         /* last frame in this batch */
2164                         if (skb->len == size) {
2165                                 smsc75xx_rx_csum_offload(dev, skb, rx_cmd_a,
2166                                         rx_cmd_b);
2167
2168                                 skb_trim(skb, skb->len - 4); /* remove fcs */
2169                                 skb->truesize = size + sizeof(struct sk_buff);
2170
2171                                 return 1;
2172                         }
2173
2174                         ax_skb = skb_clone(skb, GFP_ATOMIC);
2175                         if (unlikely(!ax_skb)) {
2176                                 netdev_warn(dev->net, "Error allocating skb\n");
2177                                 return 0;
2178                         }
2179
2180                         ax_skb->len = size;
2181                         ax_skb->data = packet;
2182                         skb_set_tail_pointer(ax_skb, size);
2183
2184                         smsc75xx_rx_csum_offload(dev, ax_skb, rx_cmd_a,
2185                                 rx_cmd_b);
2186
2187                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
2188                         ax_skb->truesize = size + sizeof(struct sk_buff);
2189
2190                         usbnet_skb_return(dev, ax_skb);
2191                 }
2192
2193                 skb_pull(skb, size);
2194
2195                 /* padding bytes before the next frame starts */
2196                 if (skb->len)
2197                         skb_pull(skb, align_count);
2198         }
2199
2200         return 1;
2201 }
2202
2203 static struct sk_buff *smsc75xx_tx_fixup(struct usbnet *dev,
2204                                          struct sk_buff *skb, gfp_t flags)
2205 {
2206         u32 tx_cmd_a, tx_cmd_b;
2207
2208         if (skb_headroom(skb) < SMSC75XX_TX_OVERHEAD) {
2209                 struct sk_buff *skb2 =
2210                         skb_copy_expand(skb, SMSC75XX_TX_OVERHEAD, 0, flags);
2211                 dev_kfree_skb_any(skb);
2212                 skb = skb2;
2213                 if (!skb)
2214                         return NULL;
2215         }
2216
2217         tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN) | TX_CMD_A_FCS;
2218
2219         if (skb->ip_summed == CHECKSUM_PARTIAL)
2220                 tx_cmd_a |= TX_CMD_A_IPE | TX_CMD_A_TPE;
2221
2222         if (skb_is_gso(skb)) {
2223                 u16 mss = max(skb_shinfo(skb)->gso_size, TX_MSS_MIN);
2224                 tx_cmd_b = (mss << TX_CMD_B_MSS_SHIFT) & TX_CMD_B_MSS;
2225
2226                 tx_cmd_a |= TX_CMD_A_LSO;
2227         } else {
2228                 tx_cmd_b = 0;
2229         }
2230
2231         skb_push(skb, 4);
2232         cpu_to_le32s(&tx_cmd_b);
2233         memcpy(skb->data, &tx_cmd_b, 4);
2234
2235         skb_push(skb, 4);
2236         cpu_to_le32s(&tx_cmd_a);
2237         memcpy(skb->data, &tx_cmd_a, 4);
2238
2239         return skb;
2240 }
2241
2242 static int smsc75xx_manage_power(struct usbnet *dev, int on)
2243 {
2244         dev->intf->needs_remote_wakeup = on;
2245         return 0;
2246 }
2247
2248 static const struct driver_info smsc75xx_info = {
2249         .description    = "smsc75xx USB 2.0 Gigabit Ethernet",
2250         .bind           = smsc75xx_bind,
2251         .unbind         = smsc75xx_unbind,
2252         .link_reset     = smsc75xx_link_reset,
2253         .reset          = smsc75xx_reset,
2254         .rx_fixup       = smsc75xx_rx_fixup,
2255         .tx_fixup       = smsc75xx_tx_fixup,
2256         .status         = smsc75xx_status,
2257         .manage_power   = smsc75xx_manage_power,
2258         .flags          = FLAG_ETHER | FLAG_SEND_ZLP | FLAG_LINK_INTR,
2259 };
2260
2261 static const struct usb_device_id products[] = {
2262         {
2263                 /* SMSC7500 USB Gigabit Ethernet Device */
2264                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7500),
2265                 .driver_info = (unsigned long) &smsc75xx_info,
2266         },
2267         {
2268                 /* SMSC7500 USB Gigabit Ethernet Device */
2269                 USB_DEVICE(USB_VENDOR_ID_SMSC, USB_PRODUCT_ID_LAN7505),
2270                 .driver_info = (unsigned long) &smsc75xx_info,
2271         },
2272         { },            /* END */
2273 };
2274 MODULE_DEVICE_TABLE(usb, products);
2275
2276 static struct usb_driver smsc75xx_driver = {
2277         .name           = SMSC_CHIPNAME,
2278         .id_table       = products,
2279         .probe          = usbnet_probe,
2280         .suspend        = smsc75xx_suspend,
2281         .resume         = smsc75xx_resume,
2282         .reset_resume   = smsc75xx_resume,
2283         .disconnect     = usbnet_disconnect,
2284         .disable_hub_initiated_lpm = 1,
2285         .supports_autosuspend = 1,
2286 };
2287
2288 module_usb_driver(smsc75xx_driver);
2289
2290 MODULE_AUTHOR("Nancy Lin");
2291 MODULE_AUTHOR("Steve Glendinning <steve.glendinning@shawell.net>");
2292 MODULE_DESCRIPTION("SMSC75XX USB 2.0 Gigabit Ethernet Devices");
2293 MODULE_LICENSE("GPL");