drivers/net/fec_mpc52xx.c

   1 /*
   2  * Driver for the MPC5200 Fast Ethernet Controller
   3  *
   4  * Originally written by Dale Farnsworth <dfarnsworth@mvista.com> and
   5  * now maintained by Sylvain Munaut <tnt@246tNt.com>
   6  *
   7  * Copyright (C) 2007  Domen Puncer, Telargo, Inc.
   8  * Copyright (C) 2007  Sylvain Munaut <tnt@246tNt.com>
   9  * Copyright (C) 2003-2004  MontaVista, Software, Inc.
  10  *
  11  * This file is licensed under the terms of the GNU General Public License
  12  * version 2. This program is licensed "as is" without any warranty of any
  13  * kind, whether express or implied.
  14  *
  15  */
  16
  17 #include <linux/module.h>
  18
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/errno.h>
  23 #include <linux/init.h>
  24 #include <linux/crc32.h>
  25 #include <linux/hardirq.h>
  26 #include <linux/delay.h>
  27 #include <linux/of_device.h>
  28 #include <linux/of_platform.h>
  29
  30 #include <linux/netdevice.h>
  31 #include <linux/etherdevice.h>
  32 #include <linux/ethtool.h>
  33 #include <linux/skbuff.h>
  34
  35 #include <asm/io.h>
  36 #include <asm/delay.h>
  37 #include <asm/mpc52xx.h>
  38
  39 #include <sysdev/bestcomm/bestcomm.h>
  40 #include <sysdev/bestcomm/fec.h>
  41
  42 #include "fec_mpc52xx.h"
  43
  44 #define DRIVER_NAME "mpc52xx-fec"
  45
  46 #define FEC5200_PHYADDR_NONE    (-1)
  47 #define FEC5200_PHYADDR_7WIRE   (-2)
  48
  49 /* Private driver data structure */
  50 struct mpc52xx_fec_priv {
  51         int duplex;
  52         int speed;
  53         int r_irq;
  54         int t_irq;
  55         struct mpc52xx_fec __iomem *fec;
  56         struct bcom_task *rx_dmatsk;
  57         struct bcom_task *tx_dmatsk;
  58         spinlock_t lock;
  59         int msg_enable;
  60
  61         /* MDIO link details */
  62         int phy_addr;
  63         unsigned int phy_speed;
  64         struct phy_device *phydev;
  65         enum phy_state link;
  66 };
  67
  68
  69 static irqreturn_t mpc52xx_fec_interrupt(int, void *);
  70 static irqreturn_t mpc52xx_fec_rx_interrupt(int, void *);
  71 static irqreturn_t mpc52xx_fec_tx_interrupt(int, void *);
  72 static void mpc52xx_fec_stop(struct net_device *dev);
  73 static void mpc52xx_fec_start(struct net_device *dev);
  74 static void mpc52xx_fec_reset(struct net_device *dev);
  75
  76 static u8 mpc52xx_fec_mac_addr[6];
  77 module_param_array_named(mac, mpc52xx_fec_mac_addr, byte, NULL, 0);
  78 MODULE_PARM_DESC(mac, "six hex digits, ie. 0x1,0x2,0xc0,0x01,0xba,0xbe");
  79
  80 #define MPC52xx_MESSAGES_DEFAULT ( NETIF_MSG_DRV | NETIF_MSG_PROBE | \
  81                 NETIF_MSG_LINK | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
  82 static int debug = -1;  /* the above default */
  83 module_param(debug, int, 0);
  84 MODULE_PARM_DESC(debug, "debugging messages level");
  85
  86 static void mpc52xx_fec_tx_timeout(struct net_device *dev)
  87 {
  88         dev_warn(&dev->dev, "transmit timed out\n");
  89
  90         mpc52xx_fec_reset(dev);
  91
  92         dev->stats.tx_errors++;
  93
  94         netif_wake_queue(dev);
  95 }
  96
  97 static void mpc52xx_fec_set_paddr(struct net_device *dev, u8 *mac)
  98 {
  99         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 100         struct mpc52xx_fec __iomem *fec = priv->fec;
 101
 102         out_be32(&fec->paddr1, *(u32 *)(&mac[0]));
 103         out_be32(&fec->paddr2, (*(u16 *)(&mac[4]) << 16) | FEC_PADDR2_TYPE);
 104 }
 105
 106 static void mpc52xx_fec_get_paddr(struct net_device *dev, u8 *mac)
 107 {
 108         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 109         struct mpc52xx_fec __iomem *fec = priv->fec;
 110
 111         *(u32 *)(&mac[0]) = in_be32(&fec->paddr1);
 112         *(u16 *)(&mac[4]) = in_be32(&fec->paddr2) >> 16;
 113 }
 114
 115 static int mpc52xx_fec_set_mac_address(struct net_device *dev, void *addr)
 116 {
 117         struct sockaddr *sock = addr;
 118
 119         memcpy(dev->dev_addr, sock->sa_data, dev->addr_len);
 120
 121         mpc52xx_fec_set_paddr(dev, sock->sa_data);
 122         return 0;
 123 }
 124
 125 static void mpc52xx_fec_free_rx_buffers(struct net_device *dev, struct bcom_task *s)
 126 {
 127         while (!bcom_queue_empty(s)) {
 128                 struct bcom_fec_bd *bd;
 129                 struct sk_buff *skb;
 130
 131                 skb = bcom_retrieve_buffer(s, NULL, (struct bcom_bd **)&bd);
 132                 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_FROM_DEVICE);
 133                 kfree_skb(skb);
 134         }
 135 }
 136
 137 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
 138 {
 139         while (!bcom_queue_full(rxtsk)) {
 140                 struct sk_buff *skb;
 141                 struct bcom_fec_bd *bd;
 142
 143                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 144                 if (skb == NULL)
 145                         return -EAGAIN;
 146
 147                 /* zero out the initial receive buffers to aid debugging */
 148                 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
 149
 150                 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
 151
 152                 bd->status = FEC_RX_BUFFER_SIZE;
 153                 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
 154                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 155
 156                 bcom_submit_next_buffer(rxtsk, skb);
 157         }
 158
 159         return 0;
 160 }
 161
 162 /* based on generic_adjust_link from fs_enet-main.c */
 163 static void mpc52xx_fec_adjust_link(struct net_device *dev)
 164 {
 165         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 166         struct phy_device *phydev = priv->phydev;
 167         int new_state = 0;
 168
 169         if (phydev->link != PHY_DOWN) {
 170                 if (phydev->duplex != priv->duplex) {
 171                         struct mpc52xx_fec __iomem *fec = priv->fec;
 172                         u32 rcntrl;
 173                         u32 tcntrl;
 174
 175                         new_state = 1;
 176                         priv->duplex = phydev->duplex;
 177
 178                         rcntrl = in_be32(&fec->r_cntrl);
 179                         tcntrl = in_be32(&fec->x_cntrl);
 180
 181                         rcntrl &= ~FEC_RCNTRL_DRT;
 182                         tcntrl &= ~FEC_TCNTRL_FDEN;
 183                         if (phydev->duplex == DUPLEX_FULL)
 184                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
 185                         else
 186                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 187
 188                         out_be32(&fec->r_cntrl, rcntrl);
 189                         out_be32(&fec->x_cntrl, tcntrl);
 190                 }
 191
 192                 if (phydev->speed != priv->speed) {
 193                         new_state = 1;
 194                         priv->speed = phydev->speed;
 195                 }
 196
 197                 if (priv->link == PHY_DOWN) {
 198                         new_state = 1;
 199                         priv->link = phydev->link;
 200                 }
 201
 202         } else if (priv->link) {
 203                 new_state = 1;
 204                 priv->link = PHY_DOWN;
 205                 priv->speed = 0;
 206                 priv->duplex = -1;
 207         }
 208
 209         if (new_state && netif_msg_link(priv))
 210                 phy_print_status(phydev);
 211 }
 212
 213 static int mpc52xx_fec_init_phy(struct net_device *dev)
 214 {
 215         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 216         struct phy_device *phydev;
 217         char phy_id[BUS_ID_SIZE];
 218
 219         snprintf(phy_id, BUS_ID_SIZE, "%x:%02x",
 220                         (unsigned int)dev->base_addr, priv->phy_addr);
 221
 222         priv->link = PHY_DOWN;
 223         priv->speed = 0;
 224         priv->duplex = -1;
 225
 226         phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
 227         if (IS_ERR(phydev)) {
 228                 dev_err(&dev->dev, "phy_connect failed\n");
 229                 return PTR_ERR(phydev);
 230         }
 231         dev_info(&dev->dev, "attached phy %i to driver %s\n",
 232                         phydev->addr, phydev->drv->name);
 233
 234         priv->phydev = phydev;
 235
 236         return 0;
 237 }
 238
 239 static int mpc52xx_fec_phy_start(struct net_device *dev)
 240 {
 241         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 242         int err;
 243
 244         if (priv->phy_addr < 0)
 245                 return 0;
 246
 247         err = mpc52xx_fec_init_phy(dev);
 248         if (err) {
 249                 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
 250                 return err;
 251         }
 252
 253         /* reset phy - this also wakes it from PDOWN */
 254         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
 255         phy_start(priv->phydev);
 256
 257         return 0;
 258 }
 259
 260 static void mpc52xx_fec_phy_stop(struct net_device *dev)
 261 {
 262         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 263
 264         if (!priv->phydev)
 265                 return;
 266
 267         phy_disconnect(priv->phydev);
 268         /* power down phy */
 269         phy_stop(priv->phydev);
 270         phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
 271 }
 272
 273 static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
 274                 struct mii_ioctl_data *mii_data, int cmd)
 275 {
 276         if (!priv->phydev)
 277                 return -ENOTSUPP;
 278
 279         return phy_mii_ioctl(priv->phydev, mii_data, cmd);
 280 }
 281
 282 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
 283 {
 284         struct mpc52xx_fec __iomem *fec = priv->fec;
 285
 286         if (priv->phydev)
 287                 return;
 288
 289         out_be32(&fec->mii_speed, priv->phy_speed);
 290 }
 291
 292 static int mpc52xx_fec_open(struct net_device *dev)
 293 {
 294         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 295         int err = -EBUSY;
 296
 297         if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
 298                         DRIVER_NAME "_ctrl", dev)) {
 299                 dev_err(&dev->dev, "ctrl interrupt request failed\n");
 300                 goto out;
 301         }
 302         if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
 303                         DRIVER_NAME "_rx", dev)) {
 304                 dev_err(&dev->dev, "rx interrupt request failed\n");
 305                 goto free_ctrl_irq;
 306         }
 307         if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
 308                         DRIVER_NAME "_tx", dev)) {
 309                 dev_err(&dev->dev, "tx interrupt request failed\n");
 310                 goto free_2irqs;
 311         }
 312
 313         bcom_fec_rx_reset(priv->rx_dmatsk);
 314         bcom_fec_tx_reset(priv->tx_dmatsk);
 315
 316         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 317         if (err) {
 318                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
 319                 goto free_irqs;
 320         }
 321
 322         err = mpc52xx_fec_phy_start(dev);
 323         if (err)
 324                 goto free_skbs;
 325
 326         bcom_enable(priv->rx_dmatsk);
 327         bcom_enable(priv->tx_dmatsk);
 328
 329         mpc52xx_fec_start(dev);
 330
 331         netif_start_queue(dev);
 332
 333         return 0;
 334
 335  free_skbs:
 336         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 337
 338  free_irqs:
 339         free_irq(priv->t_irq, dev);
 340  free_2irqs:
 341         free_irq(priv->r_irq, dev);
 342  free_ctrl_irq:
 343         free_irq(dev->irq, dev);
 344  out:
 345
 346         return err;
 347 }
 348
 349 static int mpc52xx_fec_close(struct net_device *dev)
 350 {
 351         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 352
 353         netif_stop_queue(dev);
 354
 355         mpc52xx_fec_stop(dev);
 356
 357         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 358
 359         free_irq(dev->irq, dev);
 360         free_irq(priv->r_irq, dev);
 361         free_irq(priv->t_irq, dev);
 362
 363         mpc52xx_fec_phy_stop(dev);
 364
 365         return 0;
 366 }
 367
 368 /* This will only be invoked if your driver is _not_ in XOFF state.
 369  * What this means is that you need not check it, and that this
 370  * invariant will hold if you make sure that the netif_*_queue()
 371  * calls are done at the proper times.
 372  */
 373 static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 374 {
 375         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 376         struct bcom_fec_bd *bd;
 377
 378         if (bcom_queue_full(priv->tx_dmatsk)) {
 379                 if (net_ratelimit())
 380                         dev_err(&dev->dev, "transmit queue overrun\n");
 381                 return 1;
 382         }
 383
 384         spin_lock_irq(&priv->lock);
 385         dev->trans_start = jiffies;
 386
 387         bd = (struct bcom_fec_bd *)
 388                 bcom_prepare_next_buffer(priv->tx_dmatsk);
 389
 390         bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
 391         bd->skb_pa = dma_map_single(&dev->dev, skb->data, skb->len, DMA_TO_DEVICE);
 392
 393         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
 394
 395         if (bcom_queue_full(priv->tx_dmatsk)) {
 396                 netif_stop_queue(dev);
 397         }
 398
 399         spin_unlock_irq(&priv->lock);
 400
 401         return 0;
 402 }
 403
 404 #ifdef CONFIG_NET_POLL_CONTROLLER
 405 static void mpc52xx_fec_poll_controller(struct net_device *dev)
 406 {
 407         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 408
 409         disable_irq(priv->t_irq);
 410         mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
 411         enable_irq(priv->t_irq);
 412         disable_irq(priv->r_irq);
 413         mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
 414         enable_irq(priv->r_irq);
 415 }
 416 #endif
 417
 418
 419 /* This handles BestComm transmit task interrupts
 420  */
 421 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
 422 {
 423         struct net_device *dev = dev_id;
 424         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 425
 426         spin_lock(&priv->lock);
 427
 428         while (bcom_buffer_done(priv->tx_dmatsk)) {
 429                 struct sk_buff *skb;
 430                 struct bcom_fec_bd *bd;
 431                 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
 432                                 (struct bcom_bd **)&bd);
 433                 dma_unmap_single(&dev->dev, bd->skb_pa, skb->len, DMA_TO_DEVICE);
 434
 435                 dev_kfree_skb_irq(skb);
 436         }
 437
 438         netif_wake_queue(dev);
 439
 440         spin_unlock(&priv->lock);
 441
 442         return IRQ_HANDLED;
 443 }
 444
 445 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
 446 {
 447         struct net_device *dev = dev_id;
 448         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 449
 450         while (bcom_buffer_done(priv->rx_dmatsk)) {
 451                 struct sk_buff *skb;
 452                 struct sk_buff *rskb;
 453                 struct bcom_fec_bd *bd;
 454                 u32 status;
 455
 456                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
 457                                 (struct bcom_bd **)&bd);
 458                 dma_unmap_single(&dev->dev, bd->skb_pa, rskb->len, DMA_FROM_DEVICE);
 459
 460                 /* Test for errors in received frame */
 461                 if (status & BCOM_FEC_RX_BD_ERRORS) {
 462                         /* Drop packet and reuse the buffer */
 463                         bd = (struct bcom_fec_bd *)
 464                                 bcom_prepare_next_buffer(priv->rx_dmatsk);
 465
 466                         bd->status = FEC_RX_BUFFER_SIZE;
 467                         bd->skb_pa = dma_map_single(&dev->dev, rskb->data,
 468                                         FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 469
 470                         bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
 471
 472                         dev->stats.rx_dropped++;
 473
 474                         continue;
 475                 }
 476
 477                 /* skbs are allocated on open, so now we allocate a new one,
 478                  * and remove the old (with the packet) */
 479                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 480                 if (skb) {
 481                         /* Process the received skb */
 482                         int length = status & BCOM_FEC_RX_BD_LEN_MASK;
 483
 484                         skb_put(rskb, length - 4);      /* length without CRC32 */
 485
 486                         rskb->dev = dev;
 487                         rskb->protocol = eth_type_trans(rskb, dev);
 488
 489                         netif_rx(rskb);
 490                         dev->last_rx = jiffies;
 491                 } else {
 492                         /* Can't get a new one : reuse the same & drop pkt */
 493                         dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
 494                         dev->stats.rx_dropped++;
 495
 496                         skb = rskb;
 497                 }
 498
 499                 bd = (struct bcom_fec_bd *)
 500                         bcom_prepare_next_buffer(priv->rx_dmatsk);
 501
 502                 bd->status = FEC_RX_BUFFER_SIZE;
 503                 bd->skb_pa = dma_map_single(&dev->dev, skb->data,
 504                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 505
 506                 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
 507         }
 508
 509         return IRQ_HANDLED;
 510 }
 511
 512 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
 513 {
 514         struct net_device *dev = dev_id;
 515         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 516         struct mpc52xx_fec __iomem *fec = priv->fec;
 517         u32 ievent;
 518
 519         ievent = in_be32(&fec->ievent);
 520
 521         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
 522         if (!ievent)
 523                 return IRQ_NONE;
 524
 525         out_be32(&fec->ievent, ievent);         /* clear pending events */
 526
 527         /* on fifo error, soft-reset fec */
 528         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
 529
 530                 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
 531                         dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
 532                 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
 533                         dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
 534
 535                 mpc52xx_fec_reset(dev);
 536
 537                 netif_wake_queue(dev);
 538                 return IRQ_HANDLED;
 539         }
 540
 541         if (ievent & ~FEC_IEVENT_TFINT)
 542                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
 543
 544         return IRQ_HANDLED;
 545 }
 546
 547 /*
 548  * Get the current statistics.
 549  * This may be called with the card open or closed.
 550  */
 551 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
 552 {
 553         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 554         struct net_device_stats *stats = &dev->stats;
 555         struct mpc52xx_fec __iomem *fec = priv->fec;
 556
 557         stats->rx_bytes = in_be32(&fec->rmon_r_octets);
 558         stats->rx_packets = in_be32(&fec->rmon_r_packets);
 559         stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
 560                 in_be32(&fec->rmon_r_undersize) +
 561                 in_be32(&fec->rmon_r_oversize) +
 562                 in_be32(&fec->rmon_r_frag) +
 563                 in_be32(&fec->rmon_r_jab);
 564
 565         stats->tx_bytes = in_be32(&fec->rmon_t_octets);
 566         stats->tx_packets = in_be32(&fec->rmon_t_packets);
 567         stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
 568                 in_be32(&fec->rmon_t_undersize) +
 569                 in_be32(&fec->rmon_t_oversize) +
 570                 in_be32(&fec->rmon_t_frag) +
 571                 in_be32(&fec->rmon_t_jab);
 572
 573         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
 574         stats->collisions = in_be32(&fec->rmon_t_col);
 575
 576         /* detailed rx_errors: */
 577         stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
 578                                         + in_be32(&fec->rmon_r_oversize)
 579                                         + in_be32(&fec->rmon_r_frag)
 580                                         + in_be32(&fec->rmon_r_jab);
 581         stats->rx_over_errors = in_be32(&fec->r_macerr);
 582         stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
 583         stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
 584         stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
 585         stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
 586
 587         /* detailed tx_errors: */
 588         stats->tx_aborted_errors = 0;
 589         stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
 590         stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
 591         stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
 592         stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
 593
 594         return stats;
 595 }
 596
 597 /*
 598  * Read MIB counters in order to reset them,
 599  * then zero all the stats fields in memory
 600  */
 601 static void mpc52xx_fec_reset_stats(struct net_device *dev)
 602 {
 603         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 604         struct mpc52xx_fec __iomem *fec = priv->fec;
 605
 606         out_be32(&fec->mib_control, FEC_MIB_DISABLE);
 607         memset_io(&fec->rmon_t_drop, 0,
 608                    offsetof(struct mpc52xx_fec, reserved10) -
 609                    offsetof(struct mpc52xx_fec, rmon_t_drop));
 610         out_be32(&fec->mib_control, 0);
 611
 612         memset(&dev->stats, 0, sizeof(dev->stats));
 613 }
 614
 615 /*
 616  * Set or clear the multicast filter for this adaptor.
 617  */
 618 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
 619 {
 620         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 621         struct mpc52xx_fec __iomem *fec = priv->fec;
 622         u32 rx_control;
 623
 624         rx_control = in_be32(&fec->r_cntrl);
 625
 626         if (dev->flags & IFF_PROMISC) {
 627                 rx_control |= FEC_RCNTRL_PROM;
 628                 out_be32(&fec->r_cntrl, rx_control);
 629         } else {
 630                 rx_control &= ~FEC_RCNTRL_PROM;
 631                 out_be32(&fec->r_cntrl, rx_control);
 632
 633                 if (dev->flags & IFF_ALLMULTI) {
 634                         out_be32(&fec->gaddr1, 0xffffffff);
 635                         out_be32(&fec->gaddr2, 0xffffffff);
 636                 } else {
 637                         u32 crc;
 638                         int i;
 639                         struct dev_mc_list *dmi;
 640                         u32 gaddr1 = 0x00000000;
 641                         u32 gaddr2 = 0x00000000;
 642
 643                         dmi = dev->mc_list;
 644                         for (i=0; i<dev->mc_count; i++) {
 645                                 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
 646                                 if (crc >= 32)
 647                                         gaddr1 |= 1 << (crc-32);
 648                                 else
 649                                         gaddr2 |= 1 << crc;
 650                                 dmi = dmi->next;
 651                         }
 652                         out_be32(&fec->gaddr1, gaddr1);
 653                         out_be32(&fec->gaddr2, gaddr2);
 654                 }
 655         }
 656 }
 657
 658 /**
 659  * mpc52xx_fec_hw_init
 660  * @dev: network device
 661  *
 662  * Setup various hardware setting, only needed once on start
 663  */
 664 static void mpc52xx_fec_hw_init(struct net_device *dev)
 665 {
 666         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 667         struct mpc52xx_fec __iomem *fec = priv->fec;
 668         int i;
 669
 670         /* Whack a reset.  We should wait for this. */
 671         out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
 672         for (i = 0; i < FEC_RESET_DELAY; ++i) {
 673                 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
 674                         break;
 675                 udelay(1);
 676         }
 677         if (i == FEC_RESET_DELAY)
 678                 dev_err(&dev->dev, "FEC Reset timeout!\n");
 679
 680         /* set pause to 0x20 frames */
 681         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
 682
 683         /* high service request will be deasserted when there's < 7 bytes in fifo
 684          * low service request will be deasserted when there's < 4*7 bytes in fifo
 685          */
 686         out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 687         out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 688
 689         /* alarm when <= x bytes in FIFO */
 690         out_be32(&fec->rfifo_alarm, 0x0000030c);
 691         out_be32(&fec->tfifo_alarm, 0x00000100);
 692
 693         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
 694         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
 695
 696         /* enable crc generation */
 697         out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
 698         out_be32(&fec->iaddr1, 0x00000000);     /* No individual filter */
 699         out_be32(&fec->iaddr2, 0x00000000);     /* No individual filter */
 700
 701         /* set phy speed.
 702          * this can't be done in phy driver, since it needs to be called
 703          * before fec stuff (even on resume) */
 704         mpc52xx_fec_phy_hw_init(priv);
 705 }
 706
 707 /**
 708  * mpc52xx_fec_start
 709  * @dev: network device
 710  *
 711  * This function is called to start or restart the FEC during a link
 712  * change.  This happens on fifo errors or when switching between half
 713  * and full duplex.
 714  */
 715 static void mpc52xx_fec_start(struct net_device *dev)
 716 {
 717         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 718         struct mpc52xx_fec __iomem *fec = priv->fec;
 719         u32 rcntrl;
 720         u32 tcntrl;
 721         u32 tmp;
 722
 723         /* clear sticky error bits */
 724         tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
 725         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
 726         out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
 727
 728         /* FIFOs will reset on mpc52xx_fec_enable */
 729         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
 730
 731         /* Set station address. */
 732         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
 733
 734         mpc52xx_fec_set_multicast_list(dev);
 735
 736         /* set max frame len, enable flow control, select mii mode */
 737         rcntrl = FEC_RX_BUFFER_SIZE << 16;      /* max frame length */
 738         rcntrl |= FEC_RCNTRL_FCE;
 739
 740         if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
 741                 rcntrl |= FEC_RCNTRL_MII_MODE;
 742
 743         if (priv->duplex == DUPLEX_FULL)
 744                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
 745         else {
 746                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 747                 tcntrl = 0;
 748         }
 749         out_be32(&fec->r_cntrl, rcntrl);
 750         out_be32(&fec->x_cntrl, tcntrl);
 751
 752         /* Clear any outstanding interrupt. */
 753         out_be32(&fec->ievent, 0xffffffff);
 754
 755         /* Enable interrupts we wish to service. */
 756         out_be32(&fec->imask, FEC_IMASK_ENABLE);
 757
 758         /* And last, enable the transmit and receive processing. */
 759         out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
 760         out_be32(&fec->r_des_active, 0x01000000);
 761 }
 762
 763 /**
 764  * mpc52xx_fec_stop
 765  * @dev: network device
 766  *
 767  * stop all activity on fec and empty dma buffers
 768  */
 769 static void mpc52xx_fec_stop(struct net_device *dev)
 770 {
 771         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 772         struct mpc52xx_fec __iomem *fec = priv->fec;
 773         unsigned long timeout;
 774
 775         /* disable all interrupts */
 776         out_be32(&fec->imask, 0);
 777
 778         /* Disable the rx task. */
 779         bcom_disable(priv->rx_dmatsk);
 780
 781         /* Wait for tx queue to drain, but only if we're in process context */
 782         if (!in_interrupt()) {
 783                 timeout = jiffies + msecs_to_jiffies(2000);
 784                 while (time_before(jiffies, timeout) &&
 785                                 !bcom_queue_empty(priv->tx_dmatsk))
 786                         msleep(100);
 787
 788                 if (time_after_eq(jiffies, timeout))
 789                         dev_err(&dev->dev, "queues didn't drain\n");
 790 #if 1
 791                 if (time_after_eq(jiffies, timeout)) {
 792                         dev_err(&dev->dev, "  tx: index: %i, outdex: %i\n",
 793                                         priv->tx_dmatsk->index,
 794                                         priv->tx_dmatsk->outdex);
 795                         dev_err(&dev->dev, "  rx: index: %i, outdex: %i\n",
 796                                         priv->rx_dmatsk->index,
 797                                         priv->rx_dmatsk->outdex);
 798                 }
 799 #endif
 800         }
 801
 802         bcom_disable(priv->tx_dmatsk);
 803
 804         /* Stop FEC */
 805         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
 806
 807         return;
 808 }
 809
 810 /* reset fec and bestcomm tasks */
 811 static void mpc52xx_fec_reset(struct net_device *dev)
 812 {
 813         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 814         struct mpc52xx_fec __iomem *fec = priv->fec;
 815
 816         mpc52xx_fec_stop(dev);
 817
 818         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
 819         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
 820
 821         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 822
 823         mpc52xx_fec_hw_init(dev);
 824
 825         phy_stop(priv->phydev);
 826         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
 827         phy_start(priv->phydev);
 828
 829         bcom_fec_rx_reset(priv->rx_dmatsk);
 830         bcom_fec_tx_reset(priv->tx_dmatsk);
 831
 832         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 833
 834         bcom_enable(priv->rx_dmatsk);
 835         bcom_enable(priv->tx_dmatsk);
 836
 837         mpc52xx_fec_start(dev);
 838 }
 839
 840
 841 /* ethtool interface */
 842 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
 843                 struct ethtool_drvinfo *info)
 844 {
 845         strcpy(info->driver, DRIVER_NAME);
 846 }
 847
 848 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 849 {
 850         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 851         return phy_ethtool_gset(priv->phydev, cmd);
 852 }
 853
 854 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 855 {
 856         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 857         return phy_ethtool_sset(priv->phydev, cmd);
 858 }
 859
 860 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
 861 {
 862         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 863         return priv->msg_enable;
 864 }
 865
 866 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
 867 {
 868         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 869         priv->msg_enable = level;
 870 }
 871
 872 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
 873         .get_drvinfo = mpc52xx_fec_get_drvinfo,
 874         .get_settings = mpc52xx_fec_get_settings,
 875         .set_settings = mpc52xx_fec_set_settings,
 876         .get_link = ethtool_op_get_link,
 877         .get_msglevel = mpc52xx_fec_get_msglevel,
 878         .set_msglevel = mpc52xx_fec_set_msglevel,
 879 };
 880
 881
 882 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 883 {
 884         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 885
 886         return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
 887 }
 888
 889 /* ======================================================================== */
 890 /* OF Driver                                                                */
 891 /* ======================================================================== */
 892
 893 static int __devinit
 894 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
 895 {
 896         int rv;
 897         struct net_device *ndev;
 898         struct mpc52xx_fec_priv *priv = NULL;
 899         struct resource mem;
 900         struct device_node *phy_node;
 901         const phandle *phy_handle;
 902         const u32 *prop;
 903         int prop_size;
 904
 905         phys_addr_t rx_fifo;
 906         phys_addr_t tx_fifo;
 907
 908         /* Get the ether ndev & it's private zone */
 909         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
 910         if (!ndev)
 911                 return -ENOMEM;
 912
 913         priv = netdev_priv(ndev);
 914
 915         /* Reserve FEC control zone */
 916         rv = of_address_to_resource(op->node, 0, &mem);
 917         if (rv) {
 918                 printk(KERN_ERR DRIVER_NAME ": "
 919                                 "Error while parsing device node resource\n" );
 920                 return rv;
 921         }
 922         if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
 923                 printk(KERN_ERR DRIVER_NAME
 924                         " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
 925                         (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
 926                 return -EINVAL;
 927         }
 928
 929         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
 930                 return -EBUSY;
 931
 932         /* Init ether ndev with what we have */
 933         ndev->open              = mpc52xx_fec_open;
 934         ndev->stop              = mpc52xx_fec_close;
 935         ndev->hard_start_xmit   = mpc52xx_fec_hard_start_xmit;
 936         ndev->do_ioctl          = mpc52xx_fec_ioctl;
 937         ndev->ethtool_ops       = &mpc52xx_fec_ethtool_ops;
 938         ndev->get_stats         = mpc52xx_fec_get_stats;
 939         ndev->set_mac_address   = mpc52xx_fec_set_mac_address;
 940         ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
 941         ndev->tx_timeout        = mpc52xx_fec_tx_timeout;
 942         ndev->watchdog_timeo    = FEC_WATCHDOG_TIMEOUT;
 943         ndev->base_addr         = mem.start;
 944 #ifdef CONFIG_NET_POLL_CONTROLLER
 945         ndev->poll_controller = mpc52xx_fec_poll_controller;
 946 #endif
 947
 948         priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
 949
 950         spin_lock_init(&priv->lock);
 951
 952         /* ioremap the zones */
 953         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
 954
 955         if (!priv->fec) {
 956                 rv = -ENOMEM;
 957                 goto probe_error;
 958         }
 959
 960         /* Bestcomm init */
 961         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
 962         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
 963
 964         priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
 965         priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
 966
 967         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
 968                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
 969                 rv = -ENOMEM;
 970                 goto probe_error;
 971         }
 972
 973         /* Get the IRQ we need one by one */
 974                 /* Control */
 975         ndev->irq = irq_of_parse_and_map(op->node, 0);
 976
 977                 /* RX */
 978         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
 979
 980                 /* TX */
 981         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
 982
 983         /* MAC address init */
 984         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
 985                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
 986         else
 987                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
 988
 989         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
 990
 991         /*
 992          * Link mode configuration
 993          */
 994
 995         /* Start with safe defaults for link connection */
 996         priv->phy_addr = FEC5200_PHYADDR_NONE;
 997         priv->speed = 100;
 998         priv->duplex = DUPLEX_HALF;
 999         priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
1000
1001         /* the 7-wire property means don't use MII mode */
1002         if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
1003                 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
1004
1005         /* The current speed preconfigures the speed of the MII link */
1006         prop = of_get_property(op->node, "current-speed", &prop_size);
1007         if (prop && (prop_size >= sizeof(u32) * 2)) {
1008                 priv->speed = prop[0];
1009                 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
1010         }
1011
1012         /* If there is a phy handle, setup link to that phy */
1013         phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
1014         if (phy_handle && (prop_size >= sizeof(phandle))) {
1015                 phy_node = of_find_node_by_phandle(*phy_handle);
1016                 prop = of_get_property(phy_node, "reg", &prop_size);
1017                 if (prop && (prop_size >= sizeof(u32)))
1018                         if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1019                                 priv->phy_addr = *prop;
1020                 of_node_put(phy_node);
1021         }
1022
1023         /* Hardware init */
1024         mpc52xx_fec_hw_init(ndev);
1025
1026         mpc52xx_fec_reset_stats(ndev);
1027
1028         SET_NETDEV_DEV(ndev, &op->dev);
1029
1030         /* Register the new network device */
1031         rv = register_netdev(ndev);
1032         if (rv < 0)
1033                 goto probe_error;
1034
1035         /* Now report the link setup */
1036         switch (priv->phy_addr) {
1037          case FEC5200_PHYADDR_NONE:
1038                 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1039                          priv->speed, priv->duplex ? 'F' : 'H');
1040                 break;
1041          case FEC5200_PHYADDR_7WIRE:
1042                 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1043                 break;
1044          default:
1045                 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1046                          priv->phy_addr);
1047         }
1048
1049         /* We're done ! */
1050         dev_set_drvdata(&op->dev, ndev);
1051
1052         return 0;
1053
1054
1055         /* Error handling - free everything that might be allocated */
1056 probe_error:
1057
1058         irq_dispose_mapping(ndev->irq);
1059
1060         if (priv->rx_dmatsk)
1061                 bcom_fec_rx_release(priv->rx_dmatsk);
1062         if (priv->tx_dmatsk)
1063                 bcom_fec_tx_release(priv->tx_dmatsk);
1064
1065         if (priv->fec)
1066                 iounmap(priv->fec);
1067
1068         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1069
1070         free_netdev(ndev);
1071
1072         return rv;
1073 }
1074
1075 static int
1076 mpc52xx_fec_remove(struct of_device *op)
1077 {
1078         struct net_device *ndev;
1079         struct mpc52xx_fec_priv *priv;
1080
1081         ndev = dev_get_drvdata(&op->dev);
1082         priv = netdev_priv(ndev);
1083
1084         unregister_netdev(ndev);
1085
1086         irq_dispose_mapping(ndev->irq);
1087
1088         bcom_fec_rx_release(priv->rx_dmatsk);
1089         bcom_fec_tx_release(priv->tx_dmatsk);
1090
1091         iounmap(priv->fec);
1092
1093         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1094
1095         free_netdev(ndev);
1096
1097         dev_set_drvdata(&op->dev, NULL);
1098         return 0;
1099 }
1100
1101 #ifdef CONFIG_PM
1102 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1103 {
1104         struct net_device *dev = dev_get_drvdata(&op->dev);
1105
1106         if (netif_running(dev))
1107                 mpc52xx_fec_close(dev);
1108
1109         return 0;
1110 }
1111
1112 static int mpc52xx_fec_of_resume(struct of_device *op)
1113 {
1114         struct net_device *dev = dev_get_drvdata(&op->dev);
1115
1116         mpc52xx_fec_hw_init(dev);
1117         mpc52xx_fec_reset_stats(dev);
1118
1119         if (netif_running(dev))
1120                 mpc52xx_fec_open(dev);
1121
1122         return 0;
1123 }
1124 #endif
1125
1126 static struct of_device_id mpc52xx_fec_match[] = {
1127         { .type = "network", .compatible = "fsl,mpc5200b-fec", },
1128         { .type = "network", .compatible = "fsl,mpc5200-fec", },
1129         { .type = "network", .compatible = "mpc5200-fec", },
1130         { }
1131 };
1132
1133 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1134
1135 static struct of_platform_driver mpc52xx_fec_driver = {
1136         .owner          = THIS_MODULE,
1137         .name           = DRIVER_NAME,
1138         .match_table    = mpc52xx_fec_match,
1139         .probe          = mpc52xx_fec_probe,
1140         .remove         = mpc52xx_fec_remove,
1141 #ifdef CONFIG_PM
1142         .suspend        = mpc52xx_fec_of_suspend,
1143         .resume         = mpc52xx_fec_of_resume,
1144 #endif
1145 };
1146
1147
1148 /* ======================================================================== */
1149 /* Module                                                                   */
1150 /* ======================================================================== */
1151
1152 static int __init
1153 mpc52xx_fec_init(void)
1154 {
1155 #ifdef CONFIG_FEC_MPC52xx_MDIO
1156         int ret;
1157         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1158         if (ret) {
1159                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1160                 return ret;
1161         }
1162 #endif
1163         return of_register_platform_driver(&mpc52xx_fec_driver);
1164 }
1165
1166 static void __exit
1167 mpc52xx_fec_exit(void)
1168 {
1169         of_unregister_platform_driver(&mpc52xx_fec_driver);
1170 #ifdef CONFIG_FEC_MPC52xx_MDIO
1171         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1172 #endif
1173 }
1174
1175
1176 module_init(mpc52xx_fec_init);
1177 module_exit(mpc52xx_fec_exit);
1178
1179 MODULE_LICENSE("GPL");
1180 MODULE_AUTHOR("Dale Farnsworth");
1181 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");