SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/tsi108_eth.c

   1 /*******************************************************************************
   2
   3   Copyright(c) 2006 Tundra Semiconductor Corporation.
   4
   5   This program is free software; you can redistribute it and/or modify it
   6   under the terms of the GNU General Public License as published by the Free
   7   Software Foundation; either version 2 of the License, or (at your option)
   8   any later version.
   9
  10   This program is distributed in the hope that it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc., 59
  17   Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 *******************************************************************************/
  20
  21 /* This driver is based on the driver code originally developed
  22  * for the Intel IOC80314 (ForestLake) Gigabit Ethernet by
  23  * scott.wood@timesys.com  * Copyright (C) 2003 TimeSys Corporation
  24  *
  25  * Currently changes from original version are:
  26  * - porting to Tsi108-based platform and kernel 2.6 (kong.lai@tundra.com)
  27  * - modifications to handle two ports independently and support for
  28  *   additional PHY devices (alexandre.bounine@tundra.com)
  29  * - Get hardware information from platform device. (tie-fei.zang@freescale.com)
  30  *
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/types.h>
  35 #include <linux/init.h>
  36 #include <linux/net.h>
  37 #include <linux/netdevice.h>
  38 #include <linux/etherdevice.h>
  39 #include <linux/skbuff.h>
  40 #include <linux/slab.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/delay.h>
  43 #include <linux/crc32.h>
  44 #include <linux/mii.h>
  45 #include <linux/device.h>
  46 #include <linux/pci.h>
  47 #include <linux/rtnetlink.h>
  48 #include <linux/timer.h>
  49 #include <linux/platform_device.h>
  50
  51 #include <asm/system.h>
  52 #include <asm/io.h>
  53 #include <asm/tsi108.h>
  54
  55 #include "tsi108_eth.h"
  56
  57 #define MII_READ_DELAY 10000    /* max link wait time in msec */
  58
  59 #define TSI108_RXRING_LEN     256
  60
  61 /* NOTE: The driver currently does not support receiving packets
  62  * larger than the buffer size, so don't decrease this (unless you
  63  * want to add such support).
  64  */
  65 #define TSI108_RXBUF_SIZE     1536
  66
  67 #define TSI108_TXRING_LEN     256
  68
  69 #define TSI108_TX_INT_FREQ    64
  70
  71 /* Check the phy status every half a second. */
  72 #define CHECK_PHY_INTERVAL (HZ/2)
  73
  74 static int tsi108_init_one(struct platform_device *pdev);
  75 static int tsi108_ether_remove(struct platform_device *pdev);
  76
  77 struct tsi108_prv_data {
  78         void  __iomem *regs;    /* Base of normal regs */
  79         void  __iomem *phyregs; /* Base of register bank used for PHY access */
  80
  81         struct net_device *dev;
  82         struct napi_struct napi;
  83
  84         unsigned int phy;               /* Index of PHY for this interface */
  85         unsigned int irq_num;
  86         unsigned int id;
  87         unsigned int phy_type;
  88
  89         struct timer_list timer;/* Timer that triggers the check phy function */
  90         unsigned int rxtail;    /* Next entry in rxring to read */
  91         unsigned int rxhead;    /* Next entry in rxring to give a new buffer */
  92         unsigned int rxfree;    /* Number of free, allocated RX buffers */
  93
  94         unsigned int rxpending; /* Non-zero if there are still descriptors
  95                                  * to be processed from a previous descriptor
  96                                  * interrupt condition that has been cleared */
  97
  98         unsigned int txtail;    /* Next TX descriptor to check status on */
  99         unsigned int txhead;    /* Next TX descriptor to use */
 100
 101         /* Number of free TX descriptors.  This could be calculated from
 102          * rxhead and rxtail if one descriptor were left unused to disambiguate
 103          * full and empty conditions, but it's simpler to just keep track
 104          * explicitly. */
 105
 106         unsigned int txfree;
 107
 108         unsigned int phy_ok;            /* The PHY is currently powered on. */
 109
 110         /* PHY status (duplex is 1 for half, 2 for full,
 111          * so that the default 0 indicates that neither has
 112          * yet been configured). */
 113
 114         unsigned int link_up;
 115         unsigned int speed;
 116         unsigned int duplex;
 117
 118         tx_desc *txring;
 119         rx_desc *rxring;
 120         struct sk_buff *txskbs[TSI108_TXRING_LEN];
 121         struct sk_buff *rxskbs[TSI108_RXRING_LEN];
 122
 123         dma_addr_t txdma, rxdma;
 124
 125         /* txlock nests in misclock and phy_lock */
 126
 127         spinlock_t txlock, misclock;
 128
 129         /* stats is used to hold the upper bits of each hardware counter,
 130          * and tmpstats is used to hold the full values for returning
 131          * to the caller of get_stats().  They must be separate in case
 132          * an overflow interrupt occurs before the stats are consumed.
 133          */
 134
 135         struct net_device_stats stats;
 136         struct net_device_stats tmpstats;
 137
 138         /* These stats are kept separate in hardware, thus require individual
 139          * fields for handling carry.  They are combined in get_stats.
 140          */
 141
 142         unsigned long rx_fcs;   /* Add to rx_frame_errors */
 143         unsigned long rx_short_fcs;     /* Add to rx_frame_errors */
 144         unsigned long rx_long_fcs;      /* Add to rx_frame_errors */
 145         unsigned long rx_underruns;     /* Add to rx_length_errors */
 146         unsigned long rx_overruns;      /* Add to rx_length_errors */
 147
 148         unsigned long tx_coll_abort;    /* Add to tx_aborted_errors/collisions */
 149         unsigned long tx_pause_drop;    /* Add to tx_aborted_errors */
 150
 151         unsigned long mc_hash[16];
 152         u32 msg_enable;                 /* debug message level */
 153         struct mii_if_info mii_if;
 154         unsigned int init_media;
 155 };
 156
 157 /* Structure for a device driver */
 158
 159 static struct platform_driver tsi_eth_driver = {
 160         .probe = tsi108_init_one,
 161         .remove = tsi108_ether_remove,
 162         .driver = {
 163                 .name = "tsi-ethernet",
 164         },
 165 };
 166
 167 static void tsi108_timed_checker(unsigned long dev_ptr);
 168
 169 static void dump_eth_one(struct net_device *dev)
 170 {
 171         struct tsi108_prv_data *data = netdev_priv(dev);
 172
 173         printk("Dumping %s...\n", dev->name);
 174         printk("intstat %x intmask %x phy_ok %d"
 175                " link %d speed %d duplex %d\n",
 176                TSI_READ(TSI108_EC_INTSTAT),
 177                TSI_READ(TSI108_EC_INTMASK), data->phy_ok,
 178                data->link_up, data->speed, data->duplex);
 179
 180         printk("TX: head %d, tail %d, free %d, stat %x, estat %x, err %x\n",
 181                data->txhead, data->txtail, data->txfree,
 182                TSI_READ(TSI108_EC_TXSTAT),
 183                TSI_READ(TSI108_EC_TXESTAT),
 184                TSI_READ(TSI108_EC_TXERR));
 185
 186         printk("RX: head %d, tail %d, free %d, stat %x,"
 187                " estat %x, err %x, pending %d\n\n",
 188                data->rxhead, data->rxtail, data->rxfree,
 189                TSI_READ(TSI108_EC_RXSTAT),
 190                TSI_READ(TSI108_EC_RXESTAT),
 191                TSI_READ(TSI108_EC_RXERR), data->rxpending);
 192 }
 193
 194 /* Synchronization is needed between the thread and up/down events.
 195  * Note that the PHY is accessed through the same registers for both
 196  * interfaces, so this can't be made interface-specific.
 197  */
 198
 199 static DEFINE_SPINLOCK(phy_lock);
 200
 201 static int tsi108_read_mii(struct tsi108_prv_data *data, int reg)
 202 {
 203         unsigned i;
 204
 205         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
 206                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
 207                                 (reg << TSI108_MAC_MII_ADDR_REG));
 208         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, 0);
 209         TSI_WRITE_PHY(TSI108_MAC_MII_CMD, TSI108_MAC_MII_CMD_READ);
 210         for (i = 0; i < 100; i++) {
 211                 if (!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
 212                       (TSI108_MAC_MII_IND_NOTVALID | TSI108_MAC_MII_IND_BUSY)))
 213                         break;
 214                 udelay(10);
 215         }
 216
 217         if (i == 100)
 218                 return 0xffff;
 219         else
 220                 return (TSI_READ_PHY(TSI108_MAC_MII_DATAIN));
 221 }
 222
 223 static void tsi108_write_mii(struct tsi108_prv_data *data,
 224                                 int reg, u16 val)
 225 {
 226         unsigned i = 100;
 227         TSI_WRITE_PHY(TSI108_MAC_MII_ADDR,
 228                                 (data->phy << TSI108_MAC_MII_ADDR_PHY) |
 229                                 (reg << TSI108_MAC_MII_ADDR_REG));
 230         TSI_WRITE_PHY(TSI108_MAC_MII_DATAOUT, val);
 231         while (i--) {
 232                 if(!(TSI_READ_PHY(TSI108_MAC_MII_IND) &
 233                         TSI108_MAC_MII_IND_BUSY))
 234                         break;
 235                 udelay(10);
 236         }
 237 }
 238
 239 static int tsi108_mdio_read(struct net_device *dev, int addr, int reg)
 240 {
 241         struct tsi108_prv_data *data = netdev_priv(dev);
 242         return tsi108_read_mii(data, reg);
 243 }
 244
 245 static void tsi108_mdio_write(struct net_device *dev, int addr, int reg, int val)
 246 {
 247         struct tsi108_prv_data *data = netdev_priv(dev);
 248         tsi108_write_mii(data, reg, val);
 249 }
 250
 251 static inline void tsi108_write_tbi(struct tsi108_prv_data *data,
 252                                         int reg, u16 val)
 253 {
 254         unsigned i = 1000;
 255         TSI_WRITE(TSI108_MAC_MII_ADDR,
 256                              (0x1e << TSI108_MAC_MII_ADDR_PHY)
 257                              | (reg << TSI108_MAC_MII_ADDR_REG));
 258         TSI_WRITE(TSI108_MAC_MII_DATAOUT, val);
 259         while(i--) {
 260                 if(!(TSI_READ(TSI108_MAC_MII_IND) & TSI108_MAC_MII_IND_BUSY))
 261                         return;
 262                 udelay(10);
 263         }
 264         printk(KERN_ERR "%s function time out \n", __FUNCTION__);
 265 }
 266
 267 static int mii_speed(struct mii_if_info *mii)
 268 {
 269         int advert, lpa, val, media;
 270         int lpa2 = 0;
 271         int speed;
 272
 273         if (!mii_link_ok(mii))
 274                 return 0;
 275
 276         val = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_BMSR);
 277         if ((val & BMSR_ANEGCOMPLETE) == 0)
 278                 return 0;
 279
 280         advert = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_ADVERTISE);
 281         lpa = (*mii->mdio_read) (mii->dev, mii->phy_id, MII_LPA);
 282         media = mii_nway_result(advert & lpa);
 283
 284         if (mii->supports_gmii)
 285                 lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
 286
 287         speed = lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
 288                         (media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? 100 : 10);
 289         return speed;
 290 }
 291
 292 static void tsi108_check_phy(struct net_device *dev)
 293 {
 294         struct tsi108_prv_data *data = netdev_priv(dev);
 295         u32 mac_cfg2_reg, portctrl_reg;
 296         u32 duplex;
 297         u32 speed;
 298         unsigned long flags;
 299
 300         spin_lock_irqsave(&phy_lock, flags);
 301
 302         if (!data->phy_ok)
 303                 goto out;
 304
 305         duplex = mii_check_media(&data->mii_if, netif_msg_link(data), data->init_media);
 306         data->init_media = 0;
 307
 308         if (netif_carrier_ok(dev)) {
 309
 310                 speed = mii_speed(&data->mii_if);
 311
 312                 if ((speed != data->speed) || duplex) {
 313
 314                         mac_cfg2_reg = TSI_READ(TSI108_MAC_CFG2);
 315                         portctrl_reg = TSI_READ(TSI108_EC_PORTCTRL);
 316
 317                         mac_cfg2_reg &= ~TSI108_MAC_CFG2_IFACE_MASK;
 318
 319                         if (speed == 1000) {
 320                                 mac_cfg2_reg |= TSI108_MAC_CFG2_GIG;
 321                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_NOGIG;
 322                         } else {
 323                                 mac_cfg2_reg |= TSI108_MAC_CFG2_NOGIG;
 324                                 portctrl_reg |= TSI108_EC_PORTCTRL_NOGIG;
 325                         }
 326
 327                         data->speed = speed;
 328
 329                         if (data->mii_if.full_duplex) {
 330                                 mac_cfg2_reg |= TSI108_MAC_CFG2_FULLDUPLEX;
 331                                 portctrl_reg &= ~TSI108_EC_PORTCTRL_HALFDUPLEX;
 332                                 data->duplex = 2;
 333                         } else {
 334                                 mac_cfg2_reg &= ~TSI108_MAC_CFG2_FULLDUPLEX;
 335                                 portctrl_reg |= TSI108_EC_PORTCTRL_HALFDUPLEX;
 336                                 data->duplex = 1;
 337                         }
 338
 339                         TSI_WRITE(TSI108_MAC_CFG2, mac_cfg2_reg);
 340                         TSI_WRITE(TSI108_EC_PORTCTRL, portctrl_reg);
 341                 }
 342
 343                 if (data->link_up == 0) {
 344                         /* The manual says it can take 3-4 usecs for the speed change
 345                          * to take effect.
 346                          */
 347                         udelay(5);
 348
 349                         spin_lock(&data->txlock);
 350                         if (is_valid_ether_addr(dev->dev_addr) && data->txfree)
 351                                 netif_wake_queue(dev);
 352
 353                         data->link_up = 1;
 354                         spin_unlock(&data->txlock);
 355                 }
 356         } else {
 357                 if (data->link_up == 1) {
 358                         netif_stop_queue(dev);
 359                         data->link_up = 0;
 360                         printk(KERN_NOTICE "%s : link is down\n", dev->name);
 361                 }
 362
 363                 goto out;
 364         }
 365
 366
 367 out:
 368         spin_unlock_irqrestore(&phy_lock, flags);
 369 }
 370
 371 static inline void
 372 tsi108_stat_carry_one(int carry, int carry_bit, int carry_shift,
 373                       unsigned long *upper)
 374 {
 375         if (carry & carry_bit)
 376                 *upper += carry_shift;
 377 }
 378
 379 static void tsi108_stat_carry(struct net_device *dev)
 380 {
 381         struct tsi108_prv_data *data = netdev_priv(dev);
 382         u32 carry1, carry2;
 383
 384         spin_lock_irq(&data->misclock);
 385
 386         carry1 = TSI_READ(TSI108_STAT_CARRY1);
 387         carry2 = TSI_READ(TSI108_STAT_CARRY2);
 388
 389         TSI_WRITE(TSI108_STAT_CARRY1, carry1);
 390         TSI_WRITE(TSI108_STAT_CARRY2, carry2);
 391
 392         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXBYTES,
 393                               TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
 394
 395         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXPKTS,
 396                               TSI108_STAT_RXPKTS_CARRY,
 397                               &data->stats.rx_packets);
 398
 399         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFCS,
 400                               TSI108_STAT_RXFCS_CARRY, &data->rx_fcs);
 401
 402         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXMCAST,
 403                               TSI108_STAT_RXMCAST_CARRY,
 404                               &data->stats.multicast);
 405
 406         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXALIGN,
 407                               TSI108_STAT_RXALIGN_CARRY,
 408                               &data->stats.rx_frame_errors);
 409
 410         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXLENGTH,
 411                               TSI108_STAT_RXLENGTH_CARRY,
 412                               &data->stats.rx_length_errors);
 413
 414         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXRUNT,
 415                               TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
 416
 417         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJUMBO,
 418                               TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
 419
 420         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXFRAG,
 421                               TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
 422
 423         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXJABBER,
 424                               TSI108_STAT_RXJABBER_CARRY, &data->rx_long_fcs);
 425
 426         tsi108_stat_carry_one(carry1, TSI108_STAT_CARRY1_RXDROP,
 427                               TSI108_STAT_RXDROP_CARRY,
 428                               &data->stats.rx_missed_errors);
 429
 430         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXBYTES,
 431                               TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
 432
 433         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPKTS,
 434                               TSI108_STAT_TXPKTS_CARRY,
 435                               &data->stats.tx_packets);
 436
 437         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXDEF,
 438                               TSI108_STAT_TXEXDEF_CARRY,
 439                               &data->stats.tx_aborted_errors);
 440
 441         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXEXCOL,
 442                               TSI108_STAT_TXEXCOL_CARRY, &data->tx_coll_abort);
 443
 444         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXTCOL,
 445                               TSI108_STAT_TXTCOL_CARRY,
 446                               &data->stats.collisions);
 447
 448         tsi108_stat_carry_one(carry2, TSI108_STAT_CARRY2_TXPAUSE,
 449                               TSI108_STAT_TXPAUSEDROP_CARRY,
 450                               &data->tx_pause_drop);
 451
 452         spin_unlock_irq(&data->misclock);
 453 }
 454
 455 /* Read a stat counter atomically with respect to carries.
 456  * data->misclock must be held.
 457  */
 458 static inline unsigned long
 459 tsi108_read_stat(struct tsi108_prv_data * data, int reg, int carry_bit,
 460                  int carry_shift, unsigned long *upper)
 461 {
 462         int carryreg;
 463         unsigned long val;
 464
 465         if (reg < 0xb0)
 466                 carryreg = TSI108_STAT_CARRY1;
 467         else
 468                 carryreg = TSI108_STAT_CARRY2;
 469
 470       again:
 471         val = TSI_READ(reg) | *upper;
 472
 473         /* Check to see if it overflowed, but the interrupt hasn't
 474          * been serviced yet.  If so, handle the carry here, and
 475          * try again.
 476          */
 477
 478         if (unlikely(TSI_READ(carryreg) & carry_bit)) {
 479                 *upper += carry_shift;
 480                 TSI_WRITE(carryreg, carry_bit);
 481                 goto again;
 482         }
 483
 484         return val;
 485 }
 486
 487 static struct net_device_stats *tsi108_get_stats(struct net_device *dev)
 488 {
 489         unsigned long excol;
 490
 491         struct tsi108_prv_data *data = netdev_priv(dev);
 492         spin_lock_irq(&data->misclock);
 493
 494         data->tmpstats.rx_packets =
 495             tsi108_read_stat(data, TSI108_STAT_RXPKTS,
 496                              TSI108_STAT_CARRY1_RXPKTS,
 497                              TSI108_STAT_RXPKTS_CARRY, &data->stats.rx_packets);
 498
 499         data->tmpstats.tx_packets =
 500             tsi108_read_stat(data, TSI108_STAT_TXPKTS,
 501                              TSI108_STAT_CARRY2_TXPKTS,
 502                              TSI108_STAT_TXPKTS_CARRY, &data->stats.tx_packets);
 503
 504         data->tmpstats.rx_bytes =
 505             tsi108_read_stat(data, TSI108_STAT_RXBYTES,
 506                              TSI108_STAT_CARRY1_RXBYTES,
 507                              TSI108_STAT_RXBYTES_CARRY, &data->stats.rx_bytes);
 508
 509         data->tmpstats.tx_bytes =
 510             tsi108_read_stat(data, TSI108_STAT_TXBYTES,
 511                              TSI108_STAT_CARRY2_TXBYTES,
 512                              TSI108_STAT_TXBYTES_CARRY, &data->stats.tx_bytes);
 513
 514         data->tmpstats.multicast =
 515             tsi108_read_stat(data, TSI108_STAT_RXMCAST,
 516                              TSI108_STAT_CARRY1_RXMCAST,
 517                              TSI108_STAT_RXMCAST_CARRY, &data->stats.multicast);
 518
 519         excol = tsi108_read_stat(data, TSI108_STAT_TXEXCOL,
 520                                  TSI108_STAT_CARRY2_TXEXCOL,
 521                                  TSI108_STAT_TXEXCOL_CARRY,
 522                                  &data->tx_coll_abort);
 523
 524         data->tmpstats.collisions =
 525             tsi108_read_stat(data, TSI108_STAT_TXTCOL,
 526                              TSI108_STAT_CARRY2_TXTCOL,
 527                              TSI108_STAT_TXTCOL_CARRY, &data->stats.collisions);
 528
 529         data->tmpstats.collisions += excol;
 530
 531         data->tmpstats.rx_length_errors =
 532             tsi108_read_stat(data, TSI108_STAT_RXLENGTH,
 533                              TSI108_STAT_CARRY1_RXLENGTH,
 534                              TSI108_STAT_RXLENGTH_CARRY,
 535                              &data->stats.rx_length_errors);
 536
 537         data->tmpstats.rx_length_errors +=
 538             tsi108_read_stat(data, TSI108_STAT_RXRUNT,
 539                              TSI108_STAT_CARRY1_RXRUNT,
 540                              TSI108_STAT_RXRUNT_CARRY, &data->rx_underruns);
 541
 542         data->tmpstats.rx_length_errors +=
 543             tsi108_read_stat(data, TSI108_STAT_RXJUMBO,
 544                              TSI108_STAT_CARRY1_RXJUMBO,
 545                              TSI108_STAT_RXJUMBO_CARRY, &data->rx_overruns);
 546
 547         data->tmpstats.rx_frame_errors =
 548             tsi108_read_stat(data, TSI108_STAT_RXALIGN,
 549                              TSI108_STAT_CARRY1_RXALIGN,
 550                              TSI108_STAT_RXALIGN_CARRY,
 551                              &data->stats.rx_frame_errors);
 552
 553         data->tmpstats.rx_frame_errors +=
 554             tsi108_read_stat(data, TSI108_STAT_RXFCS,
 555                              TSI108_STAT_CARRY1_RXFCS, TSI108_STAT_RXFCS_CARRY,
 556                              &data->rx_fcs);
 557
 558         data->tmpstats.rx_frame_errors +=
 559             tsi108_read_stat(data, TSI108_STAT_RXFRAG,
 560                              TSI108_STAT_CARRY1_RXFRAG,
 561                              TSI108_STAT_RXFRAG_CARRY, &data->rx_short_fcs);
 562
 563         data->tmpstats.rx_missed_errors =
 564             tsi108_read_stat(data, TSI108_STAT_RXDROP,
 565                              TSI108_STAT_CARRY1_RXDROP,
 566                              TSI108_STAT_RXDROP_CARRY,
 567                              &data->stats.rx_missed_errors);
 568
 569         /* These three are maintained by software. */
 570         data->tmpstats.rx_fifo_errors = data->stats.rx_fifo_errors;
 571         data->tmpstats.rx_crc_errors = data->stats.rx_crc_errors;
 572
 573         data->tmpstats.tx_aborted_errors =
 574             tsi108_read_stat(data, TSI108_STAT_TXEXDEF,
 575                              TSI108_STAT_CARRY2_TXEXDEF,
 576                              TSI108_STAT_TXEXDEF_CARRY,
 577                              &data->stats.tx_aborted_errors);
 578
 579         data->tmpstats.tx_aborted_errors +=
 580             tsi108_read_stat(data, TSI108_STAT_TXPAUSEDROP,
 581                              TSI108_STAT_CARRY2_TXPAUSE,
 582                              TSI108_STAT_TXPAUSEDROP_CARRY,
 583                              &data->tx_pause_drop);
 584
 585         data->tmpstats.tx_aborted_errors += excol;
 586
 587         data->tmpstats.tx_errors = data->tmpstats.tx_aborted_errors;
 588         data->tmpstats.rx_errors = data->tmpstats.rx_length_errors +
 589             data->tmpstats.rx_crc_errors +
 590             data->tmpstats.rx_frame_errors +
 591             data->tmpstats.rx_fifo_errors + data->tmpstats.rx_missed_errors;
 592
 593         spin_unlock_irq(&data->misclock);
 594         return &data->tmpstats;
 595 }
 596
 597 static void tsi108_restart_rx(struct tsi108_prv_data * data, struct net_device *dev)
 598 {
 599         TSI_WRITE(TSI108_EC_RXQ_PTRHIGH,
 600                              TSI108_EC_RXQ_PTRHIGH_VALID);
 601
 602         TSI_WRITE(TSI108_EC_RXCTRL, TSI108_EC_RXCTRL_GO
 603                              | TSI108_EC_RXCTRL_QUEUE0);
 604 }
 605
 606 static void tsi108_restart_tx(struct tsi108_prv_data * data)
 607 {
 608         TSI_WRITE(TSI108_EC_TXQ_PTRHIGH,
 609                              TSI108_EC_TXQ_PTRHIGH_VALID);
 610
 611         TSI_WRITE(TSI108_EC_TXCTRL, TSI108_EC_TXCTRL_IDLEINT |
 612                              TSI108_EC_TXCTRL_GO | TSI108_EC_TXCTRL_QUEUE0);
 613 }
 614
 615 /* txlock must be held by caller, with IRQs disabled, and
 616  * with permission to re-enable them when the lock is dropped.
 617  */
 618 static void tsi108_complete_tx(struct net_device *dev)
 619 {
 620         struct tsi108_prv_data *data = netdev_priv(dev);
 621         int tx;
 622         struct sk_buff *skb;
 623         int release = 0;
 624
 625         while (!data->txfree || data->txhead != data->txtail) {
 626                 tx = data->txtail;
 627
 628                 if (data->txring[tx].misc & TSI108_TX_OWN)
 629                         break;
 630
 631                 skb = data->txskbs[tx];
 632
 633                 if (!(data->txring[tx].misc & TSI108_TX_OK))
 634                         printk("%s: bad tx packet, misc %x\n",
 635                                dev->name, data->txring[tx].misc);
 636
 637                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
 638                 data->txfree++;
 639
 640                 if (data->txring[tx].misc & TSI108_TX_EOF) {
 641                         dev_kfree_skb_any(skb);
 642                         release++;
 643                 }
 644         }
 645
 646         if (release) {
 647                 if (is_valid_ether_addr(dev->dev_addr) && data->link_up)
 648                         netif_wake_queue(dev);
 649         }
 650 }
 651
 652 static int tsi108_send_packet(struct sk_buff * skb, struct net_device *dev)
 653 {
 654         struct tsi108_prv_data *data = netdev_priv(dev);
 655         int frags = skb_shinfo(skb)->nr_frags + 1;
 656         int i;
 657
 658         if (!data->phy_ok && net_ratelimit())
 659                 printk(KERN_ERR "%s: Transmit while PHY is down!\n", dev->name);
 660
 661         if (!data->link_up) {
 662                 printk(KERN_ERR "%s: Transmit while link is down!\n",
 663                        dev->name);
 664                 netif_stop_queue(dev);
 665                 return NETDEV_TX_BUSY;
 666         }
 667
 668         if (data->txfree < MAX_SKB_FRAGS + 1) {
 669                 netif_stop_queue(dev);
 670
 671                 if (net_ratelimit())
 672                         printk(KERN_ERR "%s: Transmit with full tx ring!\n",
 673                                dev->name);
 674                 return NETDEV_TX_BUSY;
 675         }
 676
 677         if (data->txfree - frags < MAX_SKB_FRAGS + 1) {
 678                 netif_stop_queue(dev);
 679         }
 680
 681         spin_lock_irq(&data->txlock);
 682
 683         for (i = 0; i < frags; i++) {
 684                 int misc = 0;
 685                 int tx = data->txhead;
 686
 687                 /* This is done to mark every TSI108_TX_INT_FREQ tx buffers with
 688                  * the interrupt bit.  TX descriptor-complete interrupts are
 689                  * enabled when the queue fills up, and masked when there is
 690                  * still free space.  This way, when saturating the outbound
 691                  * link, the tx interrupts are kept to a reasonable level.
 692                  * When the queue is not full, reclamation of skbs still occurs
 693                  * as new packets are transmitted, or on a queue-empty
 694                  * interrupt.
 695                  */
 696
 697                 if ((tx % TSI108_TX_INT_FREQ == 0) &&
 698                     ((TSI108_TXRING_LEN - data->txfree) >= TSI108_TX_INT_FREQ))
 699                         misc = TSI108_TX_INT;
 700
 701                 data->txskbs[tx] = skb;
 702
 703                 if (i == 0) {
 704                         data->txring[tx].buf0 = dma_map_single(NULL, skb->data,
 705                                         skb->len - skb->data_len, DMA_TO_DEVICE);
 706                         data->txring[tx].len = skb->len - skb->data_len;
 707                         misc |= TSI108_TX_SOF;
 708                 } else {
 709                         skb_frag_t *frag = &skb_shinfo(skb)->frags[i - 1];
 710
 711                         data->txring[tx].buf0 =
 712                             dma_map_page(NULL, frag->page, frag->page_offset,
 713                                             frag->size, DMA_TO_DEVICE);
 714                         data->txring[tx].len = frag->size;
 715                 }
 716
 717                 if (i == frags - 1)
 718                         misc |= TSI108_TX_EOF;
 719
 720                 if (netif_msg_pktdata(data)) {
 721                         int i;
 722                         printk("%s: Tx Frame contents (%d)\n", dev->name,
 723                                skb->len);
 724                         for (i = 0; i < skb->len; i++)
 725                                 printk(" %2.2x", skb->data[i]);
 726                         printk(".\n");
 727                 }
 728                 data->txring[tx].misc = misc | TSI108_TX_OWN;
 729
 730                 data->txhead = (data->txhead + 1) % TSI108_TXRING_LEN;
 731                 data->txfree--;
 732         }
 733
 734         tsi108_complete_tx(dev);
 735
 736         /* This must be done after the check for completed tx descriptors,
 737          * so that the tail pointer is correct.
 738          */
 739
 740         if (!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_QUEUE0))
 741                 tsi108_restart_tx(data);
 742
 743         spin_unlock_irq(&data->txlock);
 744         return NETDEV_TX_OK;
 745 }
 746
 747 static int tsi108_complete_rx(struct net_device *dev, int budget)
 748 {
 749         struct tsi108_prv_data *data = netdev_priv(dev);
 750         int done = 0;
 751
 752         while (data->rxfree && done != budget) {
 753                 int rx = data->rxtail;
 754                 struct sk_buff *skb;
 755
 756                 if (data->rxring[rx].misc & TSI108_RX_OWN)
 757                         break;
 758
 759                 skb = data->rxskbs[rx];
 760                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
 761                 data->rxfree--;
 762                 done++;
 763
 764                 if (data->rxring[rx].misc & TSI108_RX_BAD) {
 765                         spin_lock_irq(&data->misclock);
 766
 767                         if (data->rxring[rx].misc & TSI108_RX_CRC)
 768                                 data->stats.rx_crc_errors++;
 769                         if (data->rxring[rx].misc & TSI108_RX_OVER)
 770                                 data->stats.rx_fifo_errors++;
 771
 772                         spin_unlock_irq(&data->misclock);
 773
 774                         dev_kfree_skb_any(skb);
 775                         continue;
 776                 }
 777                 if (netif_msg_pktdata(data)) {
 778                         int i;
 779                         printk("%s: Rx Frame contents (%d)\n",
 780                                dev->name, data->rxring[rx].len);
 781                         for (i = 0; i < data->rxring[rx].len; i++)
 782                                 printk(" %2.2x", skb->data[i]);
 783                         printk(".\n");
 784                 }
 785
 786                 skb_put(skb, data->rxring[rx].len);
 787                 skb->protocol = eth_type_trans(skb, dev);
 788                 netif_receive_skb(skb);
 789                 dev->last_rx = jiffies;
 790         }
 791
 792         return done;
 793 }
 794
 795 static int tsi108_refill_rx(struct net_device *dev, int budget)
 796 {
 797         struct tsi108_prv_data *data = netdev_priv(dev);
 798         int done = 0;
 799
 800         while (data->rxfree != TSI108_RXRING_LEN && done != budget) {
 801                 int rx = data->rxhead;
 802                 struct sk_buff *skb;
 803
 804                 data->rxskbs[rx] = skb = dev_alloc_skb(TSI108_RXBUF_SIZE + 2);
 805                 if (!skb)
 806                         break;
 807
 808                 skb_reserve(skb, 2); /* Align the data on a 4-byte boundary. */
 809
 810                 data->rxring[rx].buf0 = dma_map_single(NULL, skb->data,
 811                                                         TSI108_RX_SKB_SIZE,
 812                                                         DMA_FROM_DEVICE);
 813
 814                 /* Sometimes the hardware sets blen to zero after packet
 815                  * reception, even though the manual says that it's only ever
 816                  * modified by the driver.
 817                  */
 818
 819                 data->rxring[rx].blen = TSI108_RX_SKB_SIZE;
 820                 data->rxring[rx].misc = TSI108_RX_OWN | TSI108_RX_INT;
 821
 822                 data->rxhead = (data->rxhead + 1) % TSI108_RXRING_LEN;
 823                 data->rxfree++;
 824                 done++;
 825         }
 826
 827         if (done != 0 && !(TSI_READ(TSI108_EC_RXSTAT) &
 828                            TSI108_EC_RXSTAT_QUEUE0))
 829                 tsi108_restart_rx(data, dev);
 830
 831         return done;
 832 }
 833
 834 static int tsi108_poll(struct napi_struct *napi, int budget)
 835 {
 836         struct tsi108_prv_data *data = container_of(napi, struct tsi108_prv_data, napi);
 837         struct net_device *dev = data->dev;
 838         u32 estat = TSI_READ(TSI108_EC_RXESTAT);
 839         u32 intstat = TSI_READ(TSI108_EC_INTSTAT);
 840         int num_received = 0, num_filled = 0;
 841
 842         intstat &= TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
 843             TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR | TSI108_INT_RXWAIT;
 844
 845         TSI_WRITE(TSI108_EC_RXESTAT, estat);
 846         TSI_WRITE(TSI108_EC_INTSTAT, intstat);
 847
 848         if (data->rxpending || (estat & TSI108_EC_RXESTAT_Q0_DESCINT))
 849                 num_received = tsi108_complete_rx(dev, budget);
 850
 851         /* This should normally fill no more slots than the number of
 852          * packets received in tsi108_complete_rx().  The exception
 853          * is when we previously ran out of memory for RX SKBs.  In that
 854          * case, it's helpful to obey the budget, not only so that the
 855          * CPU isn't hogged, but so that memory (which may still be low)
 856          * is not hogged by one device.
 857          *
 858          * A work unit is considered to be two SKBs to allow us to catch
 859          * up when the ring has shrunk due to out-of-memory but we're
 860          * still removing the full budget's worth of packets each time.
 861          */
 862
 863         if (data->rxfree < TSI108_RXRING_LEN)
 864                 num_filled = tsi108_refill_rx(dev, budget * 2);
 865
 866         if (intstat & TSI108_INT_RXERROR) {
 867                 u32 err = TSI_READ(TSI108_EC_RXERR);
 868                 TSI_WRITE(TSI108_EC_RXERR, err);
 869
 870                 if (err) {
 871                         if (net_ratelimit())
 872                                 printk(KERN_DEBUG "%s: RX error %x\n",
 873                                        dev->name, err);
 874
 875                         if (!(TSI_READ(TSI108_EC_RXSTAT) &
 876                               TSI108_EC_RXSTAT_QUEUE0))
 877                                 tsi108_restart_rx(data, dev);
 878                 }
 879         }
 880
 881         if (intstat & TSI108_INT_RXOVERRUN) {
 882                 spin_lock_irq(&data->misclock);
 883                 data->stats.rx_fifo_errors++;
 884                 spin_unlock_irq(&data->misclock);
 885         }
 886
 887         if (num_received < budget) {
 888                 data->rxpending = 0;
 889                 netif_rx_complete(dev, napi);
 890
 891                 TSI_WRITE(TSI108_EC_INTMASK,
 892                                      TSI_READ(TSI108_EC_INTMASK)
 893                                      & ~(TSI108_INT_RXQUEUE0
 894                                          | TSI108_INT_RXTHRESH |
 895                                          TSI108_INT_RXOVERRUN |
 896                                          TSI108_INT_RXERROR |
 897                                          TSI108_INT_RXWAIT));
 898         } else {
 899                 data->rxpending = 1;
 900         }
 901
 902         return num_received;
 903 }
 904
 905 static void tsi108_rx_int(struct net_device *dev)
 906 {
 907         struct tsi108_prv_data *data = netdev_priv(dev);
 908
 909         /* A race could cause dev to already be scheduled, so it's not an
 910          * error if that happens (and interrupts shouldn't be re-masked,
 911          * because that can cause harmful races, if poll has already
 912          * unmasked them but not cleared LINK_STATE_SCHED).
 913          *
 914          * This can happen if this code races with tsi108_poll(), which masks
 915          * the interrupts after tsi108_irq_one() read the mask, but before
 916          * netif_rx_schedule is called.  It could also happen due to calls
 917          * from tsi108_check_rxring().
 918          */
 919
 920         if (netif_rx_schedule_prep(dev, &data->napi)) {
 921                 /* Mask, rather than ack, the receive interrupts.  The ack
 922                  * will happen in tsi108_poll().
 923                  */
 924
 925                 TSI_WRITE(TSI108_EC_INTMASK,
 926                                      TSI_READ(TSI108_EC_INTMASK) |
 927                                      TSI108_INT_RXQUEUE0
 928                                      | TSI108_INT_RXTHRESH |
 929                                      TSI108_INT_RXOVERRUN | TSI108_INT_RXERROR |
 930                                      TSI108_INT_RXWAIT);
 931                 __netif_rx_schedule(dev, &data->napi);
 932         } else {
 933                 if (!netif_running(dev)) {
 934                         /* This can happen if an interrupt occurs while the
 935                          * interface is being brought down, as the START
 936                          * bit is cleared before the stop function is called.
 937                          *
 938                          * In this case, the interrupts must be masked, or
 939                          * they will continue indefinitely.
 940                          *
 941                          * There's a race here if the interface is brought down
 942                          * and then up in rapid succession, as the device could
 943                          * be made running after the above check and before
 944                          * the masking below.  This will only happen if the IRQ
 945                          * thread has a lower priority than the task brining
 946                          * up the interface.  Fixing this race would likely
 947                          * require changes in generic code.
 948                          */
 949
 950                         TSI_WRITE(TSI108_EC_INTMASK,
 951                                              TSI_READ
 952                                              (TSI108_EC_INTMASK) |
 953                                              TSI108_INT_RXQUEUE0 |
 954                                              TSI108_INT_RXTHRESH |
 955                                              TSI108_INT_RXOVERRUN |
 956                                              TSI108_INT_RXERROR |
 957                                              TSI108_INT_RXWAIT);
 958                 }
 959         }
 960 }
 961
 962 /* If the RX ring has run out of memory, try periodically
 963  * to allocate some more, as otherwise poll would never
 964  * get called (apart from the initial end-of-queue condition).
 965  *
 966  * This is called once per second (by default) from the thread.
 967  */
 968
 969 static void tsi108_check_rxring(struct net_device *dev)
 970 {
 971         struct tsi108_prv_data *data = netdev_priv(dev);
 972
 973         /* A poll is scheduled, as opposed to caling tsi108_refill_rx
 974          * directly, so as to keep the receive path single-threaded
 975          * (and thus not needing a lock).
 976          */
 977
 978         if (netif_running(dev) && data->rxfree < TSI108_RXRING_LEN / 4)
 979                 tsi108_rx_int(dev);
 980 }
 981
 982 static void tsi108_tx_int(struct net_device *dev)
 983 {
 984         struct tsi108_prv_data *data = netdev_priv(dev);
 985         u32 estat = TSI_READ(TSI108_EC_TXESTAT);
 986
 987         TSI_WRITE(TSI108_EC_TXESTAT, estat);
 988         TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_TXQUEUE0 |
 989                              TSI108_INT_TXIDLE | TSI108_INT_TXERROR);
 990         if (estat & TSI108_EC_TXESTAT_Q0_ERR) {
 991                 u32 err = TSI_READ(TSI108_EC_TXERR);
 992                 TSI_WRITE(TSI108_EC_TXERR, err);
 993
 994                 if (err && net_ratelimit())
 995                         printk(KERN_ERR "%s: TX error %x\n", dev->name, err);
 996         }
 997
 998         if (estat & (TSI108_EC_TXESTAT_Q0_DESCINT | TSI108_EC_TXESTAT_Q0_EOQ)) {
 999                 spin_lock(&data->txlock);
1000                 tsi108_complete_tx(dev);
1001                 spin_unlock(&data->txlock);
1002         }
1003 }
1004
1005
1006 static irqreturn_t tsi108_irq(int irq, void *dev_id)
1007 {
1008         struct net_device *dev = dev_id;
1009         struct tsi108_prv_data *data = netdev_priv(dev);
1010         u32 stat = TSI_READ(TSI108_EC_INTSTAT);
1011
1012         if (!(stat & TSI108_INT_ANY))
1013                 return IRQ_NONE;        /* Not our interrupt */
1014
1015         stat &= ~TSI_READ(TSI108_EC_INTMASK);
1016
1017         if (stat & (TSI108_INT_TXQUEUE0 | TSI108_INT_TXIDLE |
1018                     TSI108_INT_TXERROR))
1019                 tsi108_tx_int(dev);
1020         if (stat & (TSI108_INT_RXQUEUE0 | TSI108_INT_RXTHRESH |
1021                     TSI108_INT_RXWAIT | TSI108_INT_RXOVERRUN |
1022                     TSI108_INT_RXERROR))
1023                 tsi108_rx_int(dev);
1024
1025         if (stat & TSI108_INT_SFN) {
1026                 if (net_ratelimit())
1027                         printk(KERN_DEBUG "%s: SFN error\n", dev->name);
1028                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_SFN);
1029         }
1030
1031         if (stat & TSI108_INT_STATCARRY) {
1032                 tsi108_stat_carry(dev);
1033                 TSI_WRITE(TSI108_EC_INTSTAT, TSI108_INT_STATCARRY);
1034         }
1035
1036         return IRQ_HANDLED;
1037 }
1038
1039 static void tsi108_stop_ethernet(struct net_device *dev)
1040 {
1041         struct tsi108_prv_data *data = netdev_priv(dev);
1042         int i = 1000;
1043         /* Disable all TX and RX queues ... */
1044         TSI_WRITE(TSI108_EC_TXCTRL, 0);
1045         TSI_WRITE(TSI108_EC_RXCTRL, 0);
1046
1047         /* ...and wait for them to become idle */
1048         while(i--) {
1049                 if(!(TSI_READ(TSI108_EC_TXSTAT) & TSI108_EC_TXSTAT_ACTIVE))
1050                         break;
1051                 udelay(10);
1052         }
1053         i = 1000;
1054         while(i--){
1055                 if(!(TSI_READ(TSI108_EC_RXSTAT) & TSI108_EC_RXSTAT_ACTIVE))
1056                         return;
1057                 udelay(10);
1058         }
1059         printk(KERN_ERR "%s function time out \n", __FUNCTION__);
1060 }
1061
1062 static void tsi108_reset_ether(struct tsi108_prv_data * data)
1063 {
1064         TSI_WRITE(TSI108_MAC_CFG1, TSI108_MAC_CFG1_SOFTRST);
1065         udelay(100);
1066         TSI_WRITE(TSI108_MAC_CFG1, 0);
1067
1068         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATRST);
1069         udelay(100);
1070         TSI_WRITE(TSI108_EC_PORTCTRL,
1071                              TSI_READ(TSI108_EC_PORTCTRL) &
1072                              ~TSI108_EC_PORTCTRL_STATRST);
1073
1074         TSI_WRITE(TSI108_EC_TXCFG, TSI108_EC_TXCFG_RST);
1075         udelay(100);
1076         TSI_WRITE(TSI108_EC_TXCFG,
1077                              TSI_READ(TSI108_EC_TXCFG) &
1078                              ~TSI108_EC_TXCFG_RST);
1079
1080         TSI_WRITE(TSI108_EC_RXCFG, TSI108_EC_RXCFG_RST);
1081         udelay(100);
1082         TSI_WRITE(TSI108_EC_RXCFG,
1083                              TSI_READ(TSI108_EC_RXCFG) &
1084                              ~TSI108_EC_RXCFG_RST);
1085
1086         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1087                              TSI_READ(TSI108_MAC_MII_MGMT_CFG) |
1088                              TSI108_MAC_MII_MGMT_RST);
1089         udelay(100);
1090         TSI_WRITE(TSI108_MAC_MII_MGMT_CFG,
1091                              (TSI_READ(TSI108_MAC_MII_MGMT_CFG) &
1092                              ~(TSI108_MAC_MII_MGMT_RST |
1093                                TSI108_MAC_MII_MGMT_CLK)) | 0x07);
1094 }
1095
1096 static int tsi108_get_mac(struct net_device *dev)
1097 {
1098         struct tsi108_prv_data *data = netdev_priv(dev);
1099         u32 word1 = TSI_READ(TSI108_MAC_ADDR1);
1100         u32 word2 = TSI_READ(TSI108_MAC_ADDR2);
1101
1102         /* Note that the octets are reversed from what the manual says,
1103          * producing an even weirder ordering...
1104          */
1105         if (word2 == 0 && word1 == 0) {
1106                 dev->dev_addr[0] = 0x00;
1107                 dev->dev_addr[1] = 0x06;
1108                 dev->dev_addr[2] = 0xd2;
1109                 dev->dev_addr[3] = 0x00;
1110                 dev->dev_addr[4] = 0x00;
1111                 if (0x8 == data->phy)
1112                         dev->dev_addr[5] = 0x01;
1113                 else
1114                         dev->dev_addr[5] = 0x02;
1115
1116                 word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1117
1118                 word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1119                     (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1120
1121                 TSI_WRITE(TSI108_MAC_ADDR1, word1);
1122                 TSI_WRITE(TSI108_MAC_ADDR2, word2);
1123         } else {
1124                 dev->dev_addr[0] = (word2 >> 16) & 0xff;
1125                 dev->dev_addr[1] = (word2 >> 24) & 0xff;
1126                 dev->dev_addr[2] = (word1 >> 0) & 0xff;
1127                 dev->dev_addr[3] = (word1 >> 8) & 0xff;
1128                 dev->dev_addr[4] = (word1 >> 16) & 0xff;
1129                 dev->dev_addr[5] = (word1 >> 24) & 0xff;
1130         }
1131
1132         if (!is_valid_ether_addr(dev->dev_addr)) {
1133                 printk("KERN_ERR: word1: %08x, word2: %08x\n", word1, word2);
1134                 return -EINVAL;
1135         }
1136
1137         return 0;
1138 }
1139
1140 static int tsi108_set_mac(struct net_device *dev, void *addr)
1141 {
1142         struct tsi108_prv_data *data = netdev_priv(dev);
1143         u32 word1, word2;
1144         int i;
1145
1146         if (!is_valid_ether_addr(addr))
1147                 return -EINVAL;
1148
1149         for (i = 0; i < 6; i++)
1150                 /* +2 is for the offset of the HW addr type */
1151                 dev->dev_addr[i] = ((unsigned char *)addr)[i + 2];
1152
1153         word2 = (dev->dev_addr[0] << 16) | (dev->dev_addr[1] << 24);
1154
1155         word1 = (dev->dev_addr[2] << 0) | (dev->dev_addr[3] << 8) |
1156             (dev->dev_addr[4] << 16) | (dev->dev_addr[5] << 24);
1157
1158         spin_lock_irq(&data->misclock);
1159         TSI_WRITE(TSI108_MAC_ADDR1, word1);
1160         TSI_WRITE(TSI108_MAC_ADDR2, word2);
1161         spin_lock(&data->txlock);
1162
1163         if (data->txfree && data->link_up)
1164                 netif_wake_queue(dev);
1165
1166         spin_unlock(&data->txlock);
1167         spin_unlock_irq(&data->misclock);
1168         return 0;
1169 }
1170
1171 /* Protected by dev->xmit_lock. */
1172 static void tsi108_set_rx_mode(struct net_device *dev)
1173 {
1174         struct tsi108_prv_data *data = netdev_priv(dev);
1175         u32 rxcfg = TSI_READ(TSI108_EC_RXCFG);
1176
1177         if (dev->flags & IFF_PROMISC) {
1178                 rxcfg &= ~(TSI108_EC_RXCFG_UC_HASH | TSI108_EC_RXCFG_MC_HASH);
1179                 rxcfg |= TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE;
1180                 goto out;
1181         }
1182
1183         rxcfg &= ~(TSI108_EC_RXCFG_UFE | TSI108_EC_RXCFG_MFE);
1184
1185         if (dev->flags & IFF_ALLMULTI || dev->mc_count) {
1186                 int i;
1187                 struct dev_mc_list *mc = dev->mc_list;
1188                 rxcfg |= TSI108_EC_RXCFG_MFE | TSI108_EC_RXCFG_MC_HASH;
1189
1190                 memset(data->mc_hash, 0, sizeof(data->mc_hash));
1191
1192                 while (mc) {
1193                         u32 hash, crc;
1194
1195                         if (mc->dmi_addrlen == 6) {
1196                                 crc = ether_crc(6, mc->dmi_addr);
1197                                 hash = crc >> 23;
1198
1199                                 __set_bit(hash, &data->mc_hash[0]);
1200                         } else {
1201                                 printk(KERN_ERR
1202                                        "%s: got multicast address of length %d "
1203                                        "instead of 6.\n", dev->name,
1204                                        mc->dmi_addrlen);
1205                         }
1206
1207                         mc = mc->next;
1208                 }
1209
1210                 TSI_WRITE(TSI108_EC_HASHADDR,
1211                                      TSI108_EC_HASHADDR_AUTOINC |
1212                                      TSI108_EC_HASHADDR_MCAST);
1213
1214                 for (i = 0; i < 16; i++) {
1215                         /* The manual says that the hardware may drop
1216                          * back-to-back writes to the data register.
1217                          */
1218                         udelay(1);
1219                         TSI_WRITE(TSI108_EC_HASHDATA,
1220                                              data->mc_hash[i]);
1221                 }
1222         }
1223
1224       out:
1225         TSI_WRITE(TSI108_EC_RXCFG, rxcfg);
1226 }
1227
1228 static void tsi108_init_phy(struct net_device *dev)
1229 {
1230         struct tsi108_prv_data *data = netdev_priv(dev);
1231         u32 i = 0;
1232         u16 phyval = 0;
1233         unsigned long flags;
1234
1235         spin_lock_irqsave(&phy_lock, flags);
1236
1237         tsi108_write_mii(data, MII_BMCR, BMCR_RESET);
1238         while (i--){
1239                 if(!(tsi108_read_mii(data, MII_BMCR) & BMCR_RESET))
1240                         break;
1241                 udelay(10);
1242         }
1243         if (i == 0)
1244                 printk(KERN_ERR "%s function time out \n", __FUNCTION__);
1245
1246         if (data->phy_type == TSI108_PHY_BCM54XX) {
1247                 tsi108_write_mii(data, 0x09, 0x0300);
1248                 tsi108_write_mii(data, 0x10, 0x1020);
1249                 tsi108_write_mii(data, 0x1c, 0x8c00);
1250         }
1251
1252         tsi108_write_mii(data,
1253                          MII_BMCR,
1254                          BMCR_ANENABLE | BMCR_ANRESTART);
1255         while (tsi108_read_mii(data, MII_BMCR) & BMCR_ANRESTART)
1256                 cpu_relax();
1257
1258         /* Set G/MII mode and receive clock select in TBI control #2.  The
1259          * second port won't work if this isn't done, even though we don't
1260          * use TBI mode.
1261          */
1262
1263         tsi108_write_tbi(data, 0x11, 0x30);
1264
1265         /* FIXME: It seems to take more than 2 back-to-back reads to the
1266          * PHY_STAT register before the link up status bit is set.
1267          */
1268
1269         data->link_up = 0;
1270
1271         while (!((phyval = tsi108_read_mii(data, MII_BMSR)) &
1272                  BMSR_LSTATUS)) {
1273                 if (i++ > (MII_READ_DELAY / 10)) {
1274                         break;
1275                 }
1276                 spin_unlock_irqrestore(&phy_lock, flags);
1277                 msleep(10);
1278                 spin_lock_irqsave(&phy_lock, flags);
1279         }
1280
1281         data->mii_if.supports_gmii = mii_check_gmii_support(&data->mii_if);
1282         printk(KERN_DEBUG "PHY_STAT reg contains %08x\n", phyval);
1283         data->phy_ok = 1;
1284         data->init_media = 1;
1285         spin_unlock_irqrestore(&phy_lock, flags);
1286 }
1287
1288 static void tsi108_kill_phy(struct net_device *dev)
1289 {
1290         struct tsi108_prv_data *data = netdev_priv(dev);
1291         unsigned long flags;
1292
1293         spin_lock_irqsave(&phy_lock, flags);
1294         tsi108_write_mii(data, MII_BMCR, BMCR_PDOWN);
1295         data->phy_ok = 0;
1296         spin_unlock_irqrestore(&phy_lock, flags);
1297 }
1298
1299 static int tsi108_open(struct net_device *dev)
1300 {
1301         int i;
1302         struct tsi108_prv_data *data = netdev_priv(dev);
1303         unsigned int rxring_size = TSI108_RXRING_LEN * sizeof(rx_desc);
1304         unsigned int txring_size = TSI108_TXRING_LEN * sizeof(tx_desc);
1305
1306         i = request_irq(data->irq_num, tsi108_irq, 0, dev->name, dev);
1307         if (i != 0) {
1308                 printk(KERN_ERR "tsi108_eth%d: Could not allocate IRQ%d.\n",
1309                        data->id, data->irq_num);
1310                 return i;
1311         } else {
1312                 dev->irq = data->irq_num;
1313                 printk(KERN_NOTICE
1314                        "tsi108_open : Port %d Assigned IRQ %d to %s\n",
1315                        data->id, dev->irq, dev->name);
1316         }
1317
1318         data->rxring = dma_alloc_coherent(NULL, rxring_size,
1319                         &data->rxdma, GFP_KERNEL);
1320
1321         if (!data->rxring) {
1322                 printk(KERN_DEBUG
1323                        "TSI108_ETH: failed to allocate memory for rxring!\n");
1324                 return -ENOMEM;
1325         } else {
1326                 memset(data->rxring, 0, rxring_size);
1327         }
1328
1329         data->txring = dma_alloc_coherent(NULL, txring_size,
1330                         &data->txdma, GFP_KERNEL);
1331
1332         if (!data->txring) {
1333                 printk(KERN_DEBUG
1334                        "TSI108_ETH: failed to allocate memory for txring!\n");
1335                 pci_free_consistent(0, rxring_size, data->rxring, data->rxdma);
1336                 return -ENOMEM;
1337         } else {
1338                 memset(data->txring, 0, txring_size);
1339         }
1340
1341         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1342                 data->rxring[i].next0 = data->rxdma + (i + 1) * sizeof(rx_desc);
1343                 data->rxring[i].blen = TSI108_RXBUF_SIZE;
1344                 data->rxring[i].vlan = 0;
1345         }
1346
1347         data->rxring[TSI108_RXRING_LEN - 1].next0 = data->rxdma;
1348
1349         data->rxtail = 0;
1350         data->rxhead = 0;
1351
1352         for (i = 0; i < TSI108_RXRING_LEN; i++) {
1353                 struct sk_buff *skb = dev_alloc_skb(TSI108_RXBUF_SIZE + NET_IP_ALIGN);
1354
1355                 if (!skb) {
1356                         /* Bah.  No memory for now, but maybe we'll get
1357                          * some more later.
1358                          * For now, we'll live with the smaller ring.
1359                          */
1360                         printk(KERN_WARNING
1361                                "%s: Could only allocate %d receive skb(s).\n",
1362                                dev->name, i);
1363                         data->rxhead = i;
1364                         break;
1365                 }
1366
1367                 data->rxskbs[i] = skb;
1368                 /* Align the payload on a 4-byte boundary */
1369                 skb_reserve(skb, 2);
1370                 data->rxskbs[i] = skb;
1371                 data->rxring[i].buf0 = virt_to_phys(data->rxskbs[i]->data);
1372                 data->rxring[i].misc = TSI108_RX_OWN | TSI108_RX_INT;
1373         }
1374
1375         data->rxfree = i;
1376         TSI_WRITE(TSI108_EC_RXQ_PTRLOW, data->rxdma);
1377
1378         for (i = 0; i < TSI108_TXRING_LEN; i++) {
1379                 data->txring[i].next0 = data->txdma + (i + 1) * sizeof(tx_desc);
1380                 data->txring[i].misc = 0;
1381         }
1382
1383         data->txring[TSI108_TXRING_LEN - 1].next0 = data->txdma;
1384         data->txtail = 0;
1385         data->txhead = 0;
1386         data->txfree = TSI108_TXRING_LEN;
1387         TSI_WRITE(TSI108_EC_TXQ_PTRLOW, data->txdma);
1388         tsi108_init_phy(dev);
1389
1390         napi_enable(&data->napi);
1391
1392         setup_timer(&data->timer, tsi108_timed_checker, (unsigned long)dev);
1393         mod_timer(&data->timer, jiffies + 1);
1394
1395         tsi108_restart_rx(data, dev);
1396
1397         TSI_WRITE(TSI108_EC_INTSTAT, ~0);
1398
1399         TSI_WRITE(TSI108_EC_INTMASK,
1400                              ~(TSI108_INT_TXQUEUE0 | TSI108_INT_RXERROR |
1401                                TSI108_INT_RXTHRESH | TSI108_INT_RXQUEUE0 |
1402                                TSI108_INT_RXOVERRUN | TSI108_INT_RXWAIT |
1403                                TSI108_INT_SFN | TSI108_INT_STATCARRY));
1404
1405         TSI_WRITE(TSI108_MAC_CFG1,
1406                              TSI108_MAC_CFG1_RXEN | TSI108_MAC_CFG1_TXEN);
1407         netif_start_queue(dev);
1408         return 0;
1409 }
1410
1411 static int tsi108_close(struct net_device *dev)
1412 {
1413         struct tsi108_prv_data *data = netdev_priv(dev);
1414
1415         netif_stop_queue(dev);
1416         napi_disable(&data->napi);
1417
1418         del_timer_sync(&data->timer);
1419
1420         tsi108_stop_ethernet(dev);
1421         tsi108_kill_phy(dev);
1422         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1423         TSI_WRITE(TSI108_MAC_CFG1, 0);
1424
1425         /* Check for any pending TX packets, and drop them. */
1426
1427         while (!data->txfree || data->txhead != data->txtail) {
1428                 int tx = data->txtail;
1429                 struct sk_buff *skb;
1430                 skb = data->txskbs[tx];
1431                 data->txtail = (data->txtail + 1) % TSI108_TXRING_LEN;
1432                 data->txfree++;
1433                 dev_kfree_skb(skb);
1434         }
1435
1436         synchronize_irq(data->irq_num);
1437         free_irq(data->irq_num, dev);
1438
1439         /* Discard the RX ring. */
1440
1441         while (data->rxfree) {
1442                 int rx = data->rxtail;
1443                 struct sk_buff *skb;
1444
1445                 skb = data->rxskbs[rx];
1446                 data->rxtail = (data->rxtail + 1) % TSI108_RXRING_LEN;
1447                 data->rxfree--;
1448                 dev_kfree_skb(skb);
1449         }
1450
1451         dma_free_coherent(0,
1452                             TSI108_RXRING_LEN * sizeof(rx_desc),
1453                             data->rxring, data->rxdma);
1454         dma_free_coherent(0,
1455                             TSI108_TXRING_LEN * sizeof(tx_desc),
1456                             data->txring, data->txdma);
1457
1458         return 0;
1459 }
1460
1461 static void tsi108_init_mac(struct net_device *dev)
1462 {
1463         struct tsi108_prv_data *data = netdev_priv(dev);
1464
1465         TSI_WRITE(TSI108_MAC_CFG2, TSI108_MAC_CFG2_DFLT_PREAMBLE |
1466                              TSI108_MAC_CFG2_PADCRC);
1467
1468         TSI_WRITE(TSI108_EC_TXTHRESH,
1469                              (192 << TSI108_EC_TXTHRESH_STARTFILL) |
1470                              (192 << TSI108_EC_TXTHRESH_STOPFILL));
1471
1472         TSI_WRITE(TSI108_STAT_CARRYMASK1,
1473                              ~(TSI108_STAT_CARRY1_RXBYTES |
1474                                TSI108_STAT_CARRY1_RXPKTS |
1475                                TSI108_STAT_CARRY1_RXFCS |
1476                                TSI108_STAT_CARRY1_RXMCAST |
1477                                TSI108_STAT_CARRY1_RXALIGN |
1478                                TSI108_STAT_CARRY1_RXLENGTH |
1479                                TSI108_STAT_CARRY1_RXRUNT |
1480                                TSI108_STAT_CARRY1_RXJUMBO |
1481                                TSI108_STAT_CARRY1_RXFRAG |
1482                                TSI108_STAT_CARRY1_RXJABBER |
1483                                TSI108_STAT_CARRY1_RXDROP));
1484
1485         TSI_WRITE(TSI108_STAT_CARRYMASK2,
1486                              ~(TSI108_STAT_CARRY2_TXBYTES |
1487                                TSI108_STAT_CARRY2_TXPKTS |
1488                                TSI108_STAT_CARRY2_TXEXDEF |
1489                                TSI108_STAT_CARRY2_TXEXCOL |
1490                                TSI108_STAT_CARRY2_TXTCOL |
1491                                TSI108_STAT_CARRY2_TXPAUSE));
1492
1493         TSI_WRITE(TSI108_EC_PORTCTRL, TSI108_EC_PORTCTRL_STATEN);
1494         TSI_WRITE(TSI108_MAC_CFG1, 0);
1495
1496         TSI_WRITE(TSI108_EC_RXCFG,
1497                              TSI108_EC_RXCFG_SE | TSI108_EC_RXCFG_BFE);
1498
1499         TSI_WRITE(TSI108_EC_TXQ_CFG, TSI108_EC_TXQ_CFG_DESC_INT |
1500                              TSI108_EC_TXQ_CFG_EOQ_OWN_INT |
1501                              TSI108_EC_TXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1502                                                 TSI108_EC_TXQ_CFG_SFNPORT));
1503
1504         TSI_WRITE(TSI108_EC_RXQ_CFG, TSI108_EC_RXQ_CFG_DESC_INT |
1505                              TSI108_EC_RXQ_CFG_EOQ_OWN_INT |
1506                              TSI108_EC_RXQ_CFG_WSWP | (TSI108_PBM_PORT <<
1507                                                 TSI108_EC_RXQ_CFG_SFNPORT));
1508
1509         TSI_WRITE(TSI108_EC_TXQ_BUFCFG,
1510                              TSI108_EC_TXQ_BUFCFG_BURST256 |
1511                              TSI108_EC_TXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1512                                                 TSI108_EC_TXQ_BUFCFG_SFNPORT));
1513
1514         TSI_WRITE(TSI108_EC_RXQ_BUFCFG,
1515                              TSI108_EC_RXQ_BUFCFG_BURST256 |
1516                              TSI108_EC_RXQ_BUFCFG_BSWP | (TSI108_PBM_PORT <<
1517                                                 TSI108_EC_RXQ_BUFCFG_SFNPORT));
1518
1519         TSI_WRITE(TSI108_EC_INTMASK, ~0);
1520 }
1521
1522 static int tsi108_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1523 {
1524         struct tsi108_prv_data *data = netdev_priv(dev);
1525         return generic_mii_ioctl(&data->mii_if, if_mii(rq), cmd, NULL);
1526 }
1527
1528 static int
1529 tsi108_init_one(struct platform_device *pdev)
1530 {
1531         struct net_device *dev = NULL;
1532         struct tsi108_prv_data *data = NULL;
1533         hw_info *einfo;
1534         int err = 0;
1535         DECLARE_MAC_BUF(mac);
1536
1537         einfo = pdev->dev.platform_data;
1538
1539         if (NULL == einfo) {
1540                 printk(KERN_ERR "tsi-eth %d: Missing additional data!\n",
1541                        pdev->id);
1542                 return -ENODEV;
1543         }
1544
1545         /* Create an ethernet device instance */
1546
1547         dev = alloc_etherdev(sizeof(struct tsi108_prv_data));
1548         if (!dev) {
1549                 printk("tsi108_eth: Could not allocate a device structure\n");
1550                 return -ENOMEM;
1551         }
1552
1553         printk("tsi108_eth%d: probe...\n", pdev->id);
1554         data = netdev_priv(dev);
1555         data->dev = dev;
1556
1557         pr_debug("tsi108_eth%d:regs:phyresgs:phy:irq_num=0x%x:0x%x:0x%x:0x%x\n",
1558                         pdev->id, einfo->regs, einfo->phyregs,
1559                         einfo->phy, einfo->irq_num);
1560
1561         data->regs = ioremap(einfo->regs, 0x400);
1562         if (NULL == data->regs) {
1563                 err = -ENOMEM;
1564                 goto regs_fail;
1565         }
1566
1567         data->phyregs = ioremap(einfo->phyregs, 0x400);
1568         if (NULL == data->phyregs) {
1569                 err = -ENOMEM;
1570                 goto regs_fail;
1571         }
1572 /* MII setup */
1573         data->mii_if.dev = dev;
1574         data->mii_if.mdio_read = tsi108_mdio_read;
1575         data->mii_if.mdio_write = tsi108_mdio_write;
1576         data->mii_if.phy_id = einfo->phy;
1577         data->mii_if.phy_id_mask = 0x1f;
1578         data->mii_if.reg_num_mask = 0x1f;
1579
1580         data->phy = einfo->phy;
1581         data->phy_type = einfo->phy_type;
1582         data->irq_num = einfo->irq_num;
1583         data->id = pdev->id;
1584         dev->open = tsi108_open;
1585         dev->stop = tsi108_close;
1586         dev->hard_start_xmit = tsi108_send_packet;
1587         dev->set_mac_address = tsi108_set_mac;
1588         dev->set_multicast_list = tsi108_set_rx_mode;
1589         dev->get_stats = tsi108_get_stats;
1590         netif_napi_add(dev, &data->napi, tsi108_poll, 64);
1591         dev->do_ioctl = tsi108_do_ioctl;
1592
1593         /* Apparently, the Linux networking code won't use scatter-gather
1594          * if the hardware doesn't do checksums.  However, it's faster
1595          * to checksum in place and use SG, as (among other reasons)
1596          * the cache won't be dirtied (which then has to be flushed
1597          * before DMA).  The checksumming is done by the driver (via
1598          * a new function skb_csum_dev() in net/core/skbuff.c).
1599          */
1600
1601         dev->features = NETIF_F_HIGHDMA;
1602
1603         spin_lock_init(&data->txlock);
1604         spin_lock_init(&data->misclock);
1605
1606         tsi108_reset_ether(data);
1607         tsi108_kill_phy(dev);
1608
1609         if ((err = tsi108_get_mac(dev)) != 0) {
1610                 printk(KERN_ERR "%s: Invalid MAC address.  Please correct.\n",
1611                        dev->name);
1612                 goto register_fail;
1613         }
1614
1615         tsi108_init_mac(dev);
1616         err = register_netdev(dev);
1617         if (err) {
1618                 printk(KERN_ERR "%s: Cannot register net device, aborting.\n",
1619                                 dev->name);
1620                 goto register_fail;
1621         }
1622
1623         platform_set_drvdata(pdev, dev);
1624         printk(KERN_INFO "%s: Tsi108 Gigabit Ethernet, MAC: %s\n",
1625                dev->name, print_mac(mac, dev->dev_addr));
1626 #ifdef DEBUG
1627         data->msg_enable = DEBUG;
1628         dump_eth_one(dev);
1629 #endif
1630
1631         return 0;
1632
1633 register_fail:
1634         iounmap(data->regs);
1635         iounmap(data->phyregs);
1636
1637 regs_fail:
1638         free_netdev(dev);
1639         return err;
1640 }
1641
1642 /* There's no way to either get interrupts from the PHY when
1643  * something changes, or to have the Tsi108 automatically communicate
1644  * with the PHY to reconfigure itself.
1645  *
1646  * Thus, we have to do it using a timer.
1647  */
1648
1649 static void tsi108_timed_checker(unsigned long dev_ptr)
1650 {
1651         struct net_device *dev = (struct net_device *)dev_ptr;
1652         struct tsi108_prv_data *data = netdev_priv(dev);
1653
1654         tsi108_check_phy(dev);
1655         tsi108_check_rxring(dev);
1656         mod_timer(&data->timer, jiffies + CHECK_PHY_INTERVAL);
1657 }
1658
1659 static int tsi108_ether_init(void)
1660 {
1661         int ret;
1662         ret = platform_driver_register (&tsi_eth_driver);
1663         if (ret < 0){
1664                 printk("tsi108_ether_init: error initializing ethernet "
1665                        "device\n");
1666                 return ret;
1667         }
1668         return 0;
1669 }
1670
1671 static int tsi108_ether_remove(struct platform_device *pdev)
1672 {
1673         struct net_device *dev = platform_get_drvdata(pdev);
1674         struct tsi108_prv_data *priv = netdev_priv(dev);
1675
1676         unregister_netdev(dev);
1677         tsi108_stop_ethernet(dev);
1678         platform_set_drvdata(pdev, NULL);
1679         iounmap(priv->regs);
1680         iounmap(priv->phyregs);
1681         free_netdev(dev);
1682
1683         return 0;
1684 }
1685 static void tsi108_ether_exit(void)
1686 {
1687         platform_driver_unregister(&tsi_eth_driver);
1688 }
1689
1690 module_init(tsi108_ether_init);
1691 module_exit(tsi108_ether_exit);
1692
1693 MODULE_AUTHOR("Tundra Semiconductor Corporation");
1694 MODULE_DESCRIPTION("Tsi108 Gigabit Ethernet driver");
1695 MODULE_LICENSE("GPL");