SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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.parent, bd->skb_pa, skb->len,
 133                                  DMA_FROM_DEVICE);
 134                 kfree_skb(skb);
 135         }
 136 }
 137
 138 static int mpc52xx_fec_alloc_rx_buffers(struct net_device *dev, struct bcom_task *rxtsk)
 139 {
 140         while (!bcom_queue_full(rxtsk)) {
 141                 struct sk_buff *skb;
 142                 struct bcom_fec_bd *bd;
 143
 144                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 145                 if (skb == NULL)
 146                         return -EAGAIN;
 147
 148                 /* zero out the initial receive buffers to aid debugging */
 149                 memset(skb->data, 0, FEC_RX_BUFFER_SIZE);
 150
 151                 bd = (struct bcom_fec_bd *)bcom_prepare_next_buffer(rxtsk);
 152
 153                 bd->status = FEC_RX_BUFFER_SIZE;
 154                 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
 155                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 156
 157                 bcom_submit_next_buffer(rxtsk, skb);
 158         }
 159
 160         return 0;
 161 }
 162
 163 /* based on generic_adjust_link from fs_enet-main.c */
 164 static void mpc52xx_fec_adjust_link(struct net_device *dev)
 165 {
 166         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 167         struct phy_device *phydev = priv->phydev;
 168         int new_state = 0;
 169
 170         if (phydev->link != PHY_DOWN) {
 171                 if (phydev->duplex != priv->duplex) {
 172                         struct mpc52xx_fec __iomem *fec = priv->fec;
 173                         u32 rcntrl;
 174                         u32 tcntrl;
 175
 176                         new_state = 1;
 177                         priv->duplex = phydev->duplex;
 178
 179                         rcntrl = in_be32(&fec->r_cntrl);
 180                         tcntrl = in_be32(&fec->x_cntrl);
 181
 182                         rcntrl &= ~FEC_RCNTRL_DRT;
 183                         tcntrl &= ~FEC_TCNTRL_FDEN;
 184                         if (phydev->duplex == DUPLEX_FULL)
 185                                 tcntrl |= FEC_TCNTRL_FDEN;      /* FD enable */
 186                         else
 187                                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 188
 189                         out_be32(&fec->r_cntrl, rcntrl);
 190                         out_be32(&fec->x_cntrl, tcntrl);
 191                 }
 192
 193                 if (phydev->speed != priv->speed) {
 194                         new_state = 1;
 195                         priv->speed = phydev->speed;
 196                 }
 197
 198                 if (priv->link == PHY_DOWN) {
 199                         new_state = 1;
 200                         priv->link = phydev->link;
 201                 }
 202
 203         } else if (priv->link) {
 204                 new_state = 1;
 205                 priv->link = PHY_DOWN;
 206                 priv->speed = 0;
 207                 priv->duplex = -1;
 208         }
 209
 210         if (new_state && netif_msg_link(priv))
 211                 phy_print_status(phydev);
 212 }
 213
 214 static int mpc52xx_fec_init_phy(struct net_device *dev)
 215 {
 216         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 217         struct phy_device *phydev;
 218         char phy_id[BUS_ID_SIZE];
 219
 220         snprintf(phy_id, sizeof(phy_id), "%x:%02x",
 221                         (unsigned int)dev->base_addr, priv->phy_addr);
 222
 223         priv->link = PHY_DOWN;
 224         priv->speed = 0;
 225         priv->duplex = -1;
 226
 227         phydev = phy_connect(dev, phy_id, &mpc52xx_fec_adjust_link, 0, PHY_INTERFACE_MODE_MII);
 228         if (IS_ERR(phydev)) {
 229                 dev_err(&dev->dev, "phy_connect failed\n");
 230                 return PTR_ERR(phydev);
 231         }
 232         dev_info(&dev->dev, "attached phy %i to driver %s\n",
 233                         phydev->addr, phydev->drv->name);
 234
 235         priv->phydev = phydev;
 236
 237         return 0;
 238 }
 239
 240 static int mpc52xx_fec_phy_start(struct net_device *dev)
 241 {
 242         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 243         int err;
 244
 245         if (priv->phy_addr < 0)
 246                 return 0;
 247
 248         err = mpc52xx_fec_init_phy(dev);
 249         if (err) {
 250                 dev_err(&dev->dev, "mpc52xx_fec_init_phy failed\n");
 251                 return err;
 252         }
 253
 254         /* reset phy - this also wakes it from PDOWN */
 255         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
 256         phy_start(priv->phydev);
 257
 258         return 0;
 259 }
 260
 261 static void mpc52xx_fec_phy_stop(struct net_device *dev)
 262 {
 263         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 264
 265         if (!priv->phydev)
 266                 return;
 267
 268         phy_disconnect(priv->phydev);
 269         /* power down phy */
 270         phy_stop(priv->phydev);
 271         phy_write(priv->phydev, MII_BMCR, BMCR_PDOWN);
 272 }
 273
 274 static int mpc52xx_fec_phy_mii_ioctl(struct mpc52xx_fec_priv *priv,
 275                 struct mii_ioctl_data *mii_data, int cmd)
 276 {
 277         if (!priv->phydev)
 278                 return -ENOTSUPP;
 279
 280         return phy_mii_ioctl(priv->phydev, mii_data, cmd);
 281 }
 282
 283 static void mpc52xx_fec_phy_hw_init(struct mpc52xx_fec_priv *priv)
 284 {
 285         struct mpc52xx_fec __iomem *fec = priv->fec;
 286
 287         if (priv->phydev)
 288                 return;
 289
 290         out_be32(&fec->mii_speed, priv->phy_speed);
 291 }
 292
 293 static int mpc52xx_fec_open(struct net_device *dev)
 294 {
 295         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 296         int err = -EBUSY;
 297
 298         if (request_irq(dev->irq, &mpc52xx_fec_interrupt, IRQF_SHARED,
 299                         DRIVER_NAME "_ctrl", dev)) {
 300                 dev_err(&dev->dev, "ctrl interrupt request failed\n");
 301                 goto out;
 302         }
 303         if (request_irq(priv->r_irq, &mpc52xx_fec_rx_interrupt, 0,
 304                         DRIVER_NAME "_rx", dev)) {
 305                 dev_err(&dev->dev, "rx interrupt request failed\n");
 306                 goto free_ctrl_irq;
 307         }
 308         if (request_irq(priv->t_irq, &mpc52xx_fec_tx_interrupt, 0,
 309                         DRIVER_NAME "_tx", dev)) {
 310                 dev_err(&dev->dev, "tx interrupt request failed\n");
 311                 goto free_2irqs;
 312         }
 313
 314         bcom_fec_rx_reset(priv->rx_dmatsk);
 315         bcom_fec_tx_reset(priv->tx_dmatsk);
 316
 317         err = mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 318         if (err) {
 319                 dev_err(&dev->dev, "mpc52xx_fec_alloc_rx_buffers failed\n");
 320                 goto free_irqs;
 321         }
 322
 323         err = mpc52xx_fec_phy_start(dev);
 324         if (err)
 325                 goto free_skbs;
 326
 327         bcom_enable(priv->rx_dmatsk);
 328         bcom_enable(priv->tx_dmatsk);
 329
 330         mpc52xx_fec_start(dev);
 331
 332         netif_start_queue(dev);
 333
 334         return 0;
 335
 336  free_skbs:
 337         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 338
 339  free_irqs:
 340         free_irq(priv->t_irq, dev);
 341  free_2irqs:
 342         free_irq(priv->r_irq, dev);
 343  free_ctrl_irq:
 344         free_irq(dev->irq, dev);
 345  out:
 346
 347         return err;
 348 }
 349
 350 static int mpc52xx_fec_close(struct net_device *dev)
 351 {
 352         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 353
 354         netif_stop_queue(dev);
 355
 356         mpc52xx_fec_stop(dev);
 357
 358         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 359
 360         free_irq(dev->irq, dev);
 361         free_irq(priv->r_irq, dev);
 362         free_irq(priv->t_irq, dev);
 363
 364         mpc52xx_fec_phy_stop(dev);
 365
 366         return 0;
 367 }
 368
 369 /* This will only be invoked if your driver is _not_ in XOFF state.
 370  * What this means is that you need not check it, and that this
 371  * invariant will hold if you make sure that the netif_*_queue()
 372  * calls are done at the proper times.
 373  */
 374 static int mpc52xx_fec_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
 375 {
 376         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 377         struct bcom_fec_bd *bd;
 378
 379         if (bcom_queue_full(priv->tx_dmatsk)) {
 380                 if (net_ratelimit())
 381                         dev_err(&dev->dev, "transmit queue overrun\n");
 382                 return 1;
 383         }
 384
 385         spin_lock_irq(&priv->lock);
 386         dev->trans_start = jiffies;
 387
 388         bd = (struct bcom_fec_bd *)
 389                 bcom_prepare_next_buffer(priv->tx_dmatsk);
 390
 391         bd->status = skb->len | BCOM_FEC_TX_BD_TFD | BCOM_FEC_TX_BD_TC;
 392         bd->skb_pa = dma_map_single(dev->dev.parent, skb->data, skb->len,
 393                                     DMA_TO_DEVICE);
 394
 395         bcom_submit_next_buffer(priv->tx_dmatsk, skb);
 396
 397         if (bcom_queue_full(priv->tx_dmatsk)) {
 398                 netif_stop_queue(dev);
 399         }
 400
 401         spin_unlock_irq(&priv->lock);
 402
 403         return 0;
 404 }
 405
 406 #ifdef CONFIG_NET_POLL_CONTROLLER
 407 static void mpc52xx_fec_poll_controller(struct net_device *dev)
 408 {
 409         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 410
 411         disable_irq(priv->t_irq);
 412         mpc52xx_fec_tx_interrupt(priv->t_irq, dev);
 413         enable_irq(priv->t_irq);
 414         disable_irq(priv->r_irq);
 415         mpc52xx_fec_rx_interrupt(priv->r_irq, dev);
 416         enable_irq(priv->r_irq);
 417 }
 418 #endif
 419
 420
 421 /* This handles BestComm transmit task interrupts
 422  */
 423 static irqreturn_t mpc52xx_fec_tx_interrupt(int irq, void *dev_id)
 424 {
 425         struct net_device *dev = dev_id;
 426         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 427
 428         spin_lock(&priv->lock);
 429
 430         while (bcom_buffer_done(priv->tx_dmatsk)) {
 431                 struct sk_buff *skb;
 432                 struct bcom_fec_bd *bd;
 433                 skb = bcom_retrieve_buffer(priv->tx_dmatsk, NULL,
 434                                 (struct bcom_bd **)&bd);
 435                 dma_unmap_single(dev->dev.parent, bd->skb_pa, skb->len,
 436                                  DMA_TO_DEVICE);
 437
 438                 dev_kfree_skb_irq(skb);
 439         }
 440
 441         netif_wake_queue(dev);
 442
 443         spin_unlock(&priv->lock);
 444
 445         return IRQ_HANDLED;
 446 }
 447
 448 static irqreturn_t mpc52xx_fec_rx_interrupt(int irq, void *dev_id)
 449 {
 450         struct net_device *dev = dev_id;
 451         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 452
 453         while (bcom_buffer_done(priv->rx_dmatsk)) {
 454                 struct sk_buff *skb;
 455                 struct sk_buff *rskb;
 456                 struct bcom_fec_bd *bd;
 457                 u32 status;
 458
 459                 rskb = bcom_retrieve_buffer(priv->rx_dmatsk, &status,
 460                                 (struct bcom_bd **)&bd);
 461                 dma_unmap_single(dev->dev.parent, bd->skb_pa, rskb->len,
 462                                  DMA_FROM_DEVICE);
 463
 464                 /* Test for errors in received frame */
 465                 if (status & BCOM_FEC_RX_BD_ERRORS) {
 466                         /* Drop packet and reuse the buffer */
 467                         bd = (struct bcom_fec_bd *)
 468                                 bcom_prepare_next_buffer(priv->rx_dmatsk);
 469
 470                         bd->status = FEC_RX_BUFFER_SIZE;
 471                         bd->skb_pa = dma_map_single(dev->dev.parent,
 472                                         rskb->data,
 473                                         FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 474
 475                         bcom_submit_next_buffer(priv->rx_dmatsk, rskb);
 476
 477                         dev->stats.rx_dropped++;
 478
 479                         continue;
 480                 }
 481
 482                 /* skbs are allocated on open, so now we allocate a new one,
 483                  * and remove the old (with the packet) */
 484                 skb = dev_alloc_skb(FEC_RX_BUFFER_SIZE);
 485                 if (skb) {
 486                         /* Process the received skb */
 487                         int length = status & BCOM_FEC_RX_BD_LEN_MASK;
 488
 489                         skb_put(rskb, length - 4);      /* length without CRC32 */
 490
 491                         rskb->dev = dev;
 492                         rskb->protocol = eth_type_trans(rskb, dev);
 493
 494                         netif_rx(rskb);
 495                 } else {
 496                         /* Can't get a new one : reuse the same & drop pkt */
 497                         dev_notice(&dev->dev, "Memory squeeze, dropping packet.\n");
 498                         dev->stats.rx_dropped++;
 499
 500                         skb = rskb;
 501                 }
 502
 503                 bd = (struct bcom_fec_bd *)
 504                         bcom_prepare_next_buffer(priv->rx_dmatsk);
 505
 506                 bd->status = FEC_RX_BUFFER_SIZE;
 507                 bd->skb_pa = dma_map_single(dev->dev.parent, skb->data,
 508                                 FEC_RX_BUFFER_SIZE, DMA_FROM_DEVICE);
 509
 510                 bcom_submit_next_buffer(priv->rx_dmatsk, skb);
 511         }
 512
 513         return IRQ_HANDLED;
 514 }
 515
 516 static irqreturn_t mpc52xx_fec_interrupt(int irq, void *dev_id)
 517 {
 518         struct net_device *dev = dev_id;
 519         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 520         struct mpc52xx_fec __iomem *fec = priv->fec;
 521         u32 ievent;
 522
 523         ievent = in_be32(&fec->ievent);
 524
 525         ievent &= ~FEC_IEVENT_MII;      /* mii is handled separately */
 526         if (!ievent)
 527                 return IRQ_NONE;
 528
 529         out_be32(&fec->ievent, ievent);         /* clear pending events */
 530
 531         /* on fifo error, soft-reset fec */
 532         if (ievent & (FEC_IEVENT_RFIFO_ERROR | FEC_IEVENT_XFIFO_ERROR)) {
 533
 534                 if (net_ratelimit() && (ievent & FEC_IEVENT_RFIFO_ERROR))
 535                         dev_warn(&dev->dev, "FEC_IEVENT_RFIFO_ERROR\n");
 536                 if (net_ratelimit() && (ievent & FEC_IEVENT_XFIFO_ERROR))
 537                         dev_warn(&dev->dev, "FEC_IEVENT_XFIFO_ERROR\n");
 538
 539                 mpc52xx_fec_reset(dev);
 540
 541                 netif_wake_queue(dev);
 542                 return IRQ_HANDLED;
 543         }
 544
 545         if (ievent & ~FEC_IEVENT_TFINT)
 546                 dev_dbg(&dev->dev, "ievent: %08x\n", ievent);
 547
 548         return IRQ_HANDLED;
 549 }
 550
 551 /*
 552  * Get the current statistics.
 553  * This may be called with the card open or closed.
 554  */
 555 static struct net_device_stats *mpc52xx_fec_get_stats(struct net_device *dev)
 556 {
 557         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 558         struct net_device_stats *stats = &dev->stats;
 559         struct mpc52xx_fec __iomem *fec = priv->fec;
 560
 561         stats->rx_bytes = in_be32(&fec->rmon_r_octets);
 562         stats->rx_packets = in_be32(&fec->rmon_r_packets);
 563         stats->rx_errors = in_be32(&fec->rmon_r_crc_align) +
 564                 in_be32(&fec->rmon_r_undersize) +
 565                 in_be32(&fec->rmon_r_oversize) +
 566                 in_be32(&fec->rmon_r_frag) +
 567                 in_be32(&fec->rmon_r_jab);
 568
 569         stats->tx_bytes = in_be32(&fec->rmon_t_octets);
 570         stats->tx_packets = in_be32(&fec->rmon_t_packets);
 571         stats->tx_errors = in_be32(&fec->rmon_t_crc_align) +
 572                 in_be32(&fec->rmon_t_undersize) +
 573                 in_be32(&fec->rmon_t_oversize) +
 574                 in_be32(&fec->rmon_t_frag) +
 575                 in_be32(&fec->rmon_t_jab);
 576
 577         stats->multicast = in_be32(&fec->rmon_r_mc_pkt);
 578         stats->collisions = in_be32(&fec->rmon_t_col);
 579
 580         /* detailed rx_errors: */
 581         stats->rx_length_errors = in_be32(&fec->rmon_r_undersize)
 582                                         + in_be32(&fec->rmon_r_oversize)
 583                                         + in_be32(&fec->rmon_r_frag)
 584                                         + in_be32(&fec->rmon_r_jab);
 585         stats->rx_over_errors = in_be32(&fec->r_macerr);
 586         stats->rx_crc_errors = in_be32(&fec->ieee_r_crc);
 587         stats->rx_frame_errors = in_be32(&fec->ieee_r_align);
 588         stats->rx_fifo_errors = in_be32(&fec->rmon_r_drop);
 589         stats->rx_missed_errors = in_be32(&fec->rmon_r_drop);
 590
 591         /* detailed tx_errors: */
 592         stats->tx_aborted_errors = 0;
 593         stats->tx_carrier_errors = in_be32(&fec->ieee_t_cserr);
 594         stats->tx_fifo_errors = in_be32(&fec->rmon_t_drop);
 595         stats->tx_heartbeat_errors = in_be32(&fec->ieee_t_sqe);
 596         stats->tx_window_errors = in_be32(&fec->ieee_t_lcol);
 597
 598         return stats;
 599 }
 600
 601 /*
 602  * Read MIB counters in order to reset them,
 603  * then zero all the stats fields in memory
 604  */
 605 static void mpc52xx_fec_reset_stats(struct net_device *dev)
 606 {
 607         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 608         struct mpc52xx_fec __iomem *fec = priv->fec;
 609
 610         out_be32(&fec->mib_control, FEC_MIB_DISABLE);
 611         memset_io(&fec->rmon_t_drop, 0,
 612                    offsetof(struct mpc52xx_fec, reserved10) -
 613                    offsetof(struct mpc52xx_fec, rmon_t_drop));
 614         out_be32(&fec->mib_control, 0);
 615
 616         memset(&dev->stats, 0, sizeof(dev->stats));
 617 }
 618
 619 /*
 620  * Set or clear the multicast filter for this adaptor.
 621  */
 622 static void mpc52xx_fec_set_multicast_list(struct net_device *dev)
 623 {
 624         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 625         struct mpc52xx_fec __iomem *fec = priv->fec;
 626         u32 rx_control;
 627
 628         rx_control = in_be32(&fec->r_cntrl);
 629
 630         if (dev->flags & IFF_PROMISC) {
 631                 rx_control |= FEC_RCNTRL_PROM;
 632                 out_be32(&fec->r_cntrl, rx_control);
 633         } else {
 634                 rx_control &= ~FEC_RCNTRL_PROM;
 635                 out_be32(&fec->r_cntrl, rx_control);
 636
 637                 if (dev->flags & IFF_ALLMULTI) {
 638                         out_be32(&fec->gaddr1, 0xffffffff);
 639                         out_be32(&fec->gaddr2, 0xffffffff);
 640                 } else {
 641                         u32 crc;
 642                         int i;
 643                         struct dev_mc_list *dmi;
 644                         u32 gaddr1 = 0x00000000;
 645                         u32 gaddr2 = 0x00000000;
 646
 647                         dmi = dev->mc_list;
 648                         for (i=0; i<dev->mc_count; i++) {
 649                                 crc = ether_crc_le(6, dmi->dmi_addr) >> 26;
 650                                 if (crc >= 32)
 651                                         gaddr1 |= 1 << (crc-32);
 652                                 else
 653                                         gaddr2 |= 1 << crc;
 654                                 dmi = dmi->next;
 655                         }
 656                         out_be32(&fec->gaddr1, gaddr1);
 657                         out_be32(&fec->gaddr2, gaddr2);
 658                 }
 659         }
 660 }
 661
 662 /**
 663  * mpc52xx_fec_hw_init
 664  * @dev: network device
 665  *
 666  * Setup various hardware setting, only needed once on start
 667  */
 668 static void mpc52xx_fec_hw_init(struct net_device *dev)
 669 {
 670         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 671         struct mpc52xx_fec __iomem *fec = priv->fec;
 672         int i;
 673
 674         /* Whack a reset.  We should wait for this. */
 675         out_be32(&fec->ecntrl, FEC_ECNTRL_RESET);
 676         for (i = 0; i < FEC_RESET_DELAY; ++i) {
 677                 if ((in_be32(&fec->ecntrl) & FEC_ECNTRL_RESET) == 0)
 678                         break;
 679                 udelay(1);
 680         }
 681         if (i == FEC_RESET_DELAY)
 682                 dev_err(&dev->dev, "FEC Reset timeout!\n");
 683
 684         /* set pause to 0x20 frames */
 685         out_be32(&fec->op_pause, FEC_OP_PAUSE_OPCODE | 0x20);
 686
 687         /* high service request will be deasserted when there's < 7 bytes in fifo
 688          * low service request will be deasserted when there's < 4*7 bytes in fifo
 689          */
 690         out_be32(&fec->rfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 691         out_be32(&fec->tfifo_cntrl, FEC_FIFO_CNTRL_FRAME | FEC_FIFO_CNTRL_LTG_7);
 692
 693         /* alarm when <= x bytes in FIFO */
 694         out_be32(&fec->rfifo_alarm, 0x0000030c);
 695         out_be32(&fec->tfifo_alarm, 0x00000100);
 696
 697         /* begin transmittion when 256 bytes are in FIFO (or EOF or FIFO full) */
 698         out_be32(&fec->x_wmrk, FEC_FIFO_WMRK_256B);
 699
 700         /* enable crc generation */
 701         out_be32(&fec->xmit_fsm, FEC_XMIT_FSM_APPEND_CRC | FEC_XMIT_FSM_ENABLE_CRC);
 702         out_be32(&fec->iaddr1, 0x00000000);     /* No individual filter */
 703         out_be32(&fec->iaddr2, 0x00000000);     /* No individual filter */
 704
 705         /* set phy speed.
 706          * this can't be done in phy driver, since it needs to be called
 707          * before fec stuff (even on resume) */
 708         mpc52xx_fec_phy_hw_init(priv);
 709 }
 710
 711 /**
 712  * mpc52xx_fec_start
 713  * @dev: network device
 714  *
 715  * This function is called to start or restart the FEC during a link
 716  * change.  This happens on fifo errors or when switching between half
 717  * and full duplex.
 718  */
 719 static void mpc52xx_fec_start(struct net_device *dev)
 720 {
 721         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 722         struct mpc52xx_fec __iomem *fec = priv->fec;
 723         u32 rcntrl;
 724         u32 tcntrl;
 725         u32 tmp;
 726
 727         /* clear sticky error bits */
 728         tmp = FEC_FIFO_STATUS_ERR | FEC_FIFO_STATUS_UF | FEC_FIFO_STATUS_OF;
 729         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status) & tmp);
 730         out_be32(&fec->tfifo_status, in_be32(&fec->tfifo_status) & tmp);
 731
 732         /* FIFOs will reset on mpc52xx_fec_enable */
 733         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_ENABLE_IS_RESET);
 734
 735         /* Set station address. */
 736         mpc52xx_fec_set_paddr(dev, dev->dev_addr);
 737
 738         mpc52xx_fec_set_multicast_list(dev);
 739
 740         /* set max frame len, enable flow control, select mii mode */
 741         rcntrl = FEC_RX_BUFFER_SIZE << 16;      /* max frame length */
 742         rcntrl |= FEC_RCNTRL_FCE;
 743
 744         if (priv->phy_addr != FEC5200_PHYADDR_7WIRE)
 745                 rcntrl |= FEC_RCNTRL_MII_MODE;
 746
 747         if (priv->duplex == DUPLEX_FULL)
 748                 tcntrl = FEC_TCNTRL_FDEN;       /* FD enable */
 749         else {
 750                 rcntrl |= FEC_RCNTRL_DRT;       /* disable Rx on Tx (HD) */
 751                 tcntrl = 0;
 752         }
 753         out_be32(&fec->r_cntrl, rcntrl);
 754         out_be32(&fec->x_cntrl, tcntrl);
 755
 756         /* Clear any outstanding interrupt. */
 757         out_be32(&fec->ievent, 0xffffffff);
 758
 759         /* Enable interrupts we wish to service. */
 760         out_be32(&fec->imask, FEC_IMASK_ENABLE);
 761
 762         /* And last, enable the transmit and receive processing. */
 763         out_be32(&fec->ecntrl, FEC_ECNTRL_ETHER_EN);
 764         out_be32(&fec->r_des_active, 0x01000000);
 765 }
 766
 767 /**
 768  * mpc52xx_fec_stop
 769  * @dev: network device
 770  *
 771  * stop all activity on fec and empty dma buffers
 772  */
 773 static void mpc52xx_fec_stop(struct net_device *dev)
 774 {
 775         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 776         struct mpc52xx_fec __iomem *fec = priv->fec;
 777         unsigned long timeout;
 778
 779         /* disable all interrupts */
 780         out_be32(&fec->imask, 0);
 781
 782         /* Disable the rx task. */
 783         bcom_disable(priv->rx_dmatsk);
 784
 785         /* Wait for tx queue to drain, but only if we're in process context */
 786         if (!in_interrupt()) {
 787                 timeout = jiffies + msecs_to_jiffies(2000);
 788                 while (time_before(jiffies, timeout) &&
 789                                 !bcom_queue_empty(priv->tx_dmatsk))
 790                         msleep(100);
 791
 792                 if (time_after_eq(jiffies, timeout))
 793                         dev_err(&dev->dev, "queues didn't drain\n");
 794 #if 1
 795                 if (time_after_eq(jiffies, timeout)) {
 796                         dev_err(&dev->dev, "  tx: index: %i, outdex: %i\n",
 797                                         priv->tx_dmatsk->index,
 798                                         priv->tx_dmatsk->outdex);
 799                         dev_err(&dev->dev, "  rx: index: %i, outdex: %i\n",
 800                                         priv->rx_dmatsk->index,
 801                                         priv->rx_dmatsk->outdex);
 802                 }
 803 #endif
 804         }
 805
 806         bcom_disable(priv->tx_dmatsk);
 807
 808         /* Stop FEC */
 809         out_be32(&fec->ecntrl, in_be32(&fec->ecntrl) & ~FEC_ECNTRL_ETHER_EN);
 810
 811         return;
 812 }
 813
 814 /* reset fec and bestcomm tasks */
 815 static void mpc52xx_fec_reset(struct net_device *dev)
 816 {
 817         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 818         struct mpc52xx_fec __iomem *fec = priv->fec;
 819
 820         mpc52xx_fec_stop(dev);
 821
 822         out_be32(&fec->rfifo_status, in_be32(&fec->rfifo_status));
 823         out_be32(&fec->reset_cntrl, FEC_RESET_CNTRL_RESET_FIFO);
 824
 825         mpc52xx_fec_free_rx_buffers(dev, priv->rx_dmatsk);
 826
 827         mpc52xx_fec_hw_init(dev);
 828
 829         phy_stop(priv->phydev);
 830         phy_write(priv->phydev, MII_BMCR, BMCR_RESET);
 831         phy_start(priv->phydev);
 832
 833         bcom_fec_rx_reset(priv->rx_dmatsk);
 834         bcom_fec_tx_reset(priv->tx_dmatsk);
 835
 836         mpc52xx_fec_alloc_rx_buffers(dev, priv->rx_dmatsk);
 837
 838         bcom_enable(priv->rx_dmatsk);
 839         bcom_enable(priv->tx_dmatsk);
 840
 841         mpc52xx_fec_start(dev);
 842 }
 843
 844
 845 /* ethtool interface */
 846 static void mpc52xx_fec_get_drvinfo(struct net_device *dev,
 847                 struct ethtool_drvinfo *info)
 848 {
 849         strcpy(info->driver, DRIVER_NAME);
 850 }
 851
 852 static int mpc52xx_fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 853 {
 854         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 855         return phy_ethtool_gset(priv->phydev, cmd);
 856 }
 857
 858 static int mpc52xx_fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 859 {
 860         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 861         return phy_ethtool_sset(priv->phydev, cmd);
 862 }
 863
 864 static u32 mpc52xx_fec_get_msglevel(struct net_device *dev)
 865 {
 866         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 867         return priv->msg_enable;
 868 }
 869
 870 static void mpc52xx_fec_set_msglevel(struct net_device *dev, u32 level)
 871 {
 872         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 873         priv->msg_enable = level;
 874 }
 875
 876 static const struct ethtool_ops mpc52xx_fec_ethtool_ops = {
 877         .get_drvinfo = mpc52xx_fec_get_drvinfo,
 878         .get_settings = mpc52xx_fec_get_settings,
 879         .set_settings = mpc52xx_fec_set_settings,
 880         .get_link = ethtool_op_get_link,
 881         .get_msglevel = mpc52xx_fec_get_msglevel,
 882         .set_msglevel = mpc52xx_fec_set_msglevel,
 883 };
 884
 885
 886 static int mpc52xx_fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 887 {
 888         struct mpc52xx_fec_priv *priv = netdev_priv(dev);
 889
 890         return mpc52xx_fec_phy_mii_ioctl(priv, if_mii(rq), cmd);
 891 }
 892
 893 /* ======================================================================== */
 894 /* OF Driver                                                                */
 895 /* ======================================================================== */
 896
 897 static int __devinit
 898 mpc52xx_fec_probe(struct of_device *op, const struct of_device_id *match)
 899 {
 900         int rv;
 901         struct net_device *ndev;
 902         struct mpc52xx_fec_priv *priv = NULL;
 903         struct resource mem;
 904         struct device_node *phy_node;
 905         const phandle *phy_handle;
 906         const u32 *prop;
 907         int prop_size;
 908
 909         phys_addr_t rx_fifo;
 910         phys_addr_t tx_fifo;
 911
 912         /* Get the ether ndev & it's private zone */
 913         ndev = alloc_etherdev(sizeof(struct mpc52xx_fec_priv));
 914         if (!ndev)
 915                 return -ENOMEM;
 916
 917         priv = netdev_priv(ndev);
 918
 919         /* Reserve FEC control zone */
 920         rv = of_address_to_resource(op->node, 0, &mem);
 921         if (rv) {
 922                 printk(KERN_ERR DRIVER_NAME ": "
 923                                 "Error while parsing device node resource\n" );
 924                 return rv;
 925         }
 926         if ((mem.end - mem.start + 1) < sizeof(struct mpc52xx_fec)) {
 927                 printk(KERN_ERR DRIVER_NAME
 928                         " - invalid resource size (%lx < %x), check mpc52xx_devices.c\n",
 929                         (unsigned long)(mem.end - mem.start + 1), sizeof(struct mpc52xx_fec));
 930                 return -EINVAL;
 931         }
 932
 933         if (!request_mem_region(mem.start, sizeof(struct mpc52xx_fec), DRIVER_NAME))
 934                 return -EBUSY;
 935
 936         /* Init ether ndev with what we have */
 937         ndev->open              = mpc52xx_fec_open;
 938         ndev->stop              = mpc52xx_fec_close;
 939         ndev->hard_start_xmit   = mpc52xx_fec_hard_start_xmit;
 940         ndev->do_ioctl          = mpc52xx_fec_ioctl;
 941         ndev->ethtool_ops       = &mpc52xx_fec_ethtool_ops;
 942         ndev->get_stats         = mpc52xx_fec_get_stats;
 943         ndev->set_mac_address   = mpc52xx_fec_set_mac_address;
 944         ndev->set_multicast_list = mpc52xx_fec_set_multicast_list;
 945         ndev->tx_timeout        = mpc52xx_fec_tx_timeout;
 946         ndev->watchdog_timeo    = FEC_WATCHDOG_TIMEOUT;
 947         ndev->base_addr         = mem.start;
 948 #ifdef CONFIG_NET_POLL_CONTROLLER
 949         ndev->poll_controller = mpc52xx_fec_poll_controller;
 950 #endif
 951
 952         priv->t_irq = priv->r_irq = ndev->irq = NO_IRQ; /* IRQ are free for now */
 953
 954         spin_lock_init(&priv->lock);
 955
 956         /* ioremap the zones */
 957         priv->fec = ioremap(mem.start, sizeof(struct mpc52xx_fec));
 958
 959         if (!priv->fec) {
 960                 rv = -ENOMEM;
 961                 goto probe_error;
 962         }
 963
 964         /* Bestcomm init */
 965         rx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, rfifo_data);
 966         tx_fifo = ndev->base_addr + offsetof(struct mpc52xx_fec, tfifo_data);
 967
 968         priv->rx_dmatsk = bcom_fec_rx_init(FEC_RX_NUM_BD, rx_fifo, FEC_RX_BUFFER_SIZE);
 969         priv->tx_dmatsk = bcom_fec_tx_init(FEC_TX_NUM_BD, tx_fifo);
 970
 971         if (!priv->rx_dmatsk || !priv->tx_dmatsk) {
 972                 printk(KERN_ERR DRIVER_NAME ": Can not init SDMA tasks\n" );
 973                 rv = -ENOMEM;
 974                 goto probe_error;
 975         }
 976
 977         /* Get the IRQ we need one by one */
 978                 /* Control */
 979         ndev->irq = irq_of_parse_and_map(op->node, 0);
 980
 981                 /* RX */
 982         priv->r_irq = bcom_get_task_irq(priv->rx_dmatsk);
 983
 984                 /* TX */
 985         priv->t_irq = bcom_get_task_irq(priv->tx_dmatsk);
 986
 987         /* MAC address init */
 988         if (!is_zero_ether_addr(mpc52xx_fec_mac_addr))
 989                 memcpy(ndev->dev_addr, mpc52xx_fec_mac_addr, 6);
 990         else
 991                 mpc52xx_fec_get_paddr(ndev, ndev->dev_addr);
 992
 993         priv->msg_enable = netif_msg_init(debug, MPC52xx_MESSAGES_DEFAULT);
 994
 995         /*
 996          * Link mode configuration
 997          */
 998
 999         /* Start with safe defaults for link connection */
1000         priv->phy_addr = FEC5200_PHYADDR_NONE;
1001         priv->speed = 100;
1002         priv->duplex = DUPLEX_HALF;
1003         priv->phy_speed = ((mpc52xx_find_ipb_freq(op->node) >> 20) / 5) << 1;
1004
1005         /* the 7-wire property means don't use MII mode */
1006         if (of_find_property(op->node, "fsl,7-wire-mode", NULL))
1007                 priv->phy_addr = FEC5200_PHYADDR_7WIRE;
1008
1009         /* The current speed preconfigures the speed of the MII link */
1010         prop = of_get_property(op->node, "current-speed", &prop_size);
1011         if (prop && (prop_size >= sizeof(u32) * 2)) {
1012                 priv->speed = prop[0];
1013                 priv->duplex = prop[1] ? DUPLEX_FULL : DUPLEX_HALF;
1014         }
1015
1016         /* If there is a phy handle, setup link to that phy */
1017         phy_handle = of_get_property(op->node, "phy-handle", &prop_size);
1018         if (phy_handle && (prop_size >= sizeof(phandle))) {
1019                 phy_node = of_find_node_by_phandle(*phy_handle);
1020                 prop = of_get_property(phy_node, "reg", &prop_size);
1021                 if (prop && (prop_size >= sizeof(u32)))
1022                         if ((*prop >= 0) && (*prop < PHY_MAX_ADDR))
1023                                 priv->phy_addr = *prop;
1024                 of_node_put(phy_node);
1025         }
1026
1027         /* Hardware init */
1028         mpc52xx_fec_hw_init(ndev);
1029
1030         mpc52xx_fec_reset_stats(ndev);
1031
1032         SET_NETDEV_DEV(ndev, &op->dev);
1033
1034         /* Register the new network device */
1035         rv = register_netdev(ndev);
1036         if (rv < 0)
1037                 goto probe_error;
1038
1039         /* Now report the link setup */
1040         switch (priv->phy_addr) {
1041          case FEC5200_PHYADDR_NONE:
1042                 dev_info(&ndev->dev, "Fixed speed MII link: %i%cD\n",
1043                          priv->speed, priv->duplex ? 'F' : 'H');
1044                 break;
1045          case FEC5200_PHYADDR_7WIRE:
1046                 dev_info(&ndev->dev, "using 7-wire PHY mode\n");
1047                 break;
1048          default:
1049                 dev_info(&ndev->dev, "Using PHY at MDIO address %i\n",
1050                          priv->phy_addr);
1051         }
1052
1053         /* We're done ! */
1054         dev_set_drvdata(&op->dev, ndev);
1055
1056         return 0;
1057
1058
1059         /* Error handling - free everything that might be allocated */
1060 probe_error:
1061
1062         irq_dispose_mapping(ndev->irq);
1063
1064         if (priv->rx_dmatsk)
1065                 bcom_fec_rx_release(priv->rx_dmatsk);
1066         if (priv->tx_dmatsk)
1067                 bcom_fec_tx_release(priv->tx_dmatsk);
1068
1069         if (priv->fec)
1070                 iounmap(priv->fec);
1071
1072         release_mem_region(mem.start, sizeof(struct mpc52xx_fec));
1073
1074         free_netdev(ndev);
1075
1076         return rv;
1077 }
1078
1079 static int
1080 mpc52xx_fec_remove(struct of_device *op)
1081 {
1082         struct net_device *ndev;
1083         struct mpc52xx_fec_priv *priv;
1084
1085         ndev = dev_get_drvdata(&op->dev);
1086         priv = netdev_priv(ndev);
1087
1088         unregister_netdev(ndev);
1089
1090         irq_dispose_mapping(ndev->irq);
1091
1092         bcom_fec_rx_release(priv->rx_dmatsk);
1093         bcom_fec_tx_release(priv->tx_dmatsk);
1094
1095         iounmap(priv->fec);
1096
1097         release_mem_region(ndev->base_addr, sizeof(struct mpc52xx_fec));
1098
1099         free_netdev(ndev);
1100
1101         dev_set_drvdata(&op->dev, NULL);
1102         return 0;
1103 }
1104
1105 #ifdef CONFIG_PM
1106 static int mpc52xx_fec_of_suspend(struct of_device *op, pm_message_t state)
1107 {
1108         struct net_device *dev = dev_get_drvdata(&op->dev);
1109
1110         if (netif_running(dev))
1111                 mpc52xx_fec_close(dev);
1112
1113         return 0;
1114 }
1115
1116 static int mpc52xx_fec_of_resume(struct of_device *op)
1117 {
1118         struct net_device *dev = dev_get_drvdata(&op->dev);
1119
1120         mpc52xx_fec_hw_init(dev);
1121         mpc52xx_fec_reset_stats(dev);
1122
1123         if (netif_running(dev))
1124                 mpc52xx_fec_open(dev);
1125
1126         return 0;
1127 }
1128 #endif
1129
1130 static struct of_device_id mpc52xx_fec_match[] = {
1131         { .type = "network", .compatible = "fsl,mpc5200b-fec", },
1132         { .type = "network", .compatible = "fsl,mpc5200-fec", },
1133         { .type = "network", .compatible = "mpc5200-fec", },
1134         { }
1135 };
1136
1137 MODULE_DEVICE_TABLE(of, mpc52xx_fec_match);
1138
1139 static struct of_platform_driver mpc52xx_fec_driver = {
1140         .owner          = THIS_MODULE,
1141         .name           = DRIVER_NAME,
1142         .match_table    = mpc52xx_fec_match,
1143         .probe          = mpc52xx_fec_probe,
1144         .remove         = mpc52xx_fec_remove,
1145 #ifdef CONFIG_PM
1146         .suspend        = mpc52xx_fec_of_suspend,
1147         .resume         = mpc52xx_fec_of_resume,
1148 #endif
1149 };
1150
1151
1152 /* ======================================================================== */
1153 /* Module                                                                   */
1154 /* ======================================================================== */
1155
1156 static int __init
1157 mpc52xx_fec_init(void)
1158 {
1159 #ifdef CONFIG_FEC_MPC52xx_MDIO
1160         int ret;
1161         ret = of_register_platform_driver(&mpc52xx_fec_mdio_driver);
1162         if (ret) {
1163                 printk(KERN_ERR DRIVER_NAME ": failed to register mdio driver\n");
1164                 return ret;
1165         }
1166 #endif
1167         return of_register_platform_driver(&mpc52xx_fec_driver);
1168 }
1169
1170 static void __exit
1171 mpc52xx_fec_exit(void)
1172 {
1173         of_unregister_platform_driver(&mpc52xx_fec_driver);
1174 #ifdef CONFIG_FEC_MPC52xx_MDIO
1175         of_unregister_platform_driver(&mpc52xx_fec_mdio_driver);
1176 #endif
1177 }
1178
1179
1180 module_init(mpc52xx_fec_init);
1181 module_exit(mpc52xx_fec_exit);
1182
1183 MODULE_LICENSE("GPL");
1184 MODULE_AUTHOR("Dale Farnsworth");
1185 MODULE_DESCRIPTION("Ethernet driver for the Freescale MPC52xx FEC");