git.oblomov.eu Git - linux-2.6/blob - drivers/net/fs_enet/fs_enet-main.c

   1 /*
   2  * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
   3  *
   4  * Copyright (c) 2003 Intracom S.A.
   5  *  by Pantelis Antoniou <panto@intracom.gr>
   6  *
   7  * 2005 (c) MontaVista Software, Inc.
   8  * Vitaly Bordug <vbordug@ru.mvista.com>
   9  *
  10  * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
  11  * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
  12  *
  13  * This file is licensed under the terms of the GNU General Public License
  14  * version 2. This program is licensed "as is" without any warranty of any
  15  * kind, whether express or implied.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/string.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/errno.h>
  24 #include <linux/ioport.h>
  25 #include <linux/slab.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/mii.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/bitops.h>
  36 #include <linux/fs.h>
  37 #include <linux/platform_device.h>
  38 #include <linux/phy.h>
  39
  40 #include <linux/vmalloc.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/irq.h>
  43 #include <asm/uaccess.h>
  44
  45 #ifdef CONFIG_PPC_CPM_NEW_BINDING
  46 #include <asm/of_platform.h>
  47 #endif
  48
  49 #include "fs_enet.h"
  50
  51 /*************************************************/
  52
  53 #ifndef CONFIG_PPC_CPM_NEW_BINDING
  54 static char version[] __devinitdata =
  55     DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")" "\n";
  56 #endif
  57
  58 MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
  59 MODULE_DESCRIPTION("Freescale Ethernet Driver");
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(DRV_MODULE_VERSION);
  62
  63 static int fs_enet_debug = -1; /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
  64 module_param(fs_enet_debug, int, 0);
  65 MODULE_PARM_DESC(fs_enet_debug,
  66                  "Freescale bitmapped debugging message enable value");
  67
  68 #ifdef CONFIG_NET_POLL_CONTROLLER
  69 static void fs_enet_netpoll(struct net_device *dev);
  70 #endif
  71
  72 static void fs_set_multicast_list(struct net_device *dev)
  73 {
  74         struct fs_enet_private *fep = netdev_priv(dev);
  75
  76         (*fep->ops->set_multicast_list)(dev);
  77 }
  78
  79 static void skb_align(struct sk_buff *skb, int align)
  80 {
  81         int off = ((unsigned long)skb->data) & (align - 1);
  82
  83         if (off)
  84                 skb_reserve(skb, align - off);
  85 }
  86
  87 /* NAPI receive function */
  88 static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
  89 {
  90         struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
  91         struct net_device *dev = to_net_dev(fep->dev);
  92         const struct fs_platform_info *fpi = fep->fpi;
  93         cbd_t __iomem *bdp;
  94         struct sk_buff *skb, *skbn, *skbt;
  95         int received = 0;
  96         u16 pkt_len, sc;
  97         int curidx;
  98
  99         if (!netif_running(dev))
 100                 return 0;
 101
 102         /*
 103          * First, grab all of the stats for the incoming packet.
 104          * These get messed up if we get called due to a busy condition.
 105          */
 106         bdp = fep->cur_rx;
 107
 108         /* clear RX status bits for napi*/
 109         (*fep->ops->napi_clear_rx_event)(dev);
 110
 111         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
 112                 curidx = bdp - fep->rx_bd_base;
 113
 114                 /*
 115                  * Since we have allocated space to hold a complete frame,
 116                  * the last indicator should be set.
 117                  */
 118                 if ((sc & BD_ENET_RX_LAST) == 0)
 119                         printk(KERN_WARNING DRV_MODULE_NAME
 120                                ": %s rcv is not +last\n",
 121                                dev->name);
 122
 123                 /*
 124                  * Check for errors.
 125                  */
 126                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 127                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 128                         fep->stats.rx_errors++;
 129                         /* Frame too long or too short. */
 130                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 131                                 fep->stats.rx_length_errors++;
 132                         /* Frame alignment */
 133                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 134                                 fep->stats.rx_frame_errors++;
 135                         /* CRC Error */
 136                         if (sc & BD_ENET_RX_CR)
 137                                 fep->stats.rx_crc_errors++;
 138                         /* FIFO overrun */
 139                         if (sc & BD_ENET_RX_OV)
 140                                 fep->stats.rx_crc_errors++;
 141
 142                         skb = fep->rx_skbuff[curidx];
 143
 144                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 145                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 146                                 DMA_FROM_DEVICE);
 147
 148                         skbn = skb;
 149
 150                 } else {
 151                         skb = fep->rx_skbuff[curidx];
 152
 153                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 154                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 155                                 DMA_FROM_DEVICE);
 156
 157                         /*
 158                          * Process the incoming frame.
 159                          */
 160                         fep->stats.rx_packets++;
 161                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 162                         fep->stats.rx_bytes += pkt_len + 4;
 163
 164                         if (pkt_len <= fpi->rx_copybreak) {
 165                                 /* +2 to make IP header L1 cache aligned */
 166                                 skbn = dev_alloc_skb(pkt_len + 2);
 167                                 if (skbn != NULL) {
 168                                         skb_reserve(skbn, 2);   /* align IP header */
 169                                         skb_copy_from_linear_data(skb,
 170                                                       skbn->data, pkt_len);
 171                                         /* swap */
 172                                         skbt = skb;
 173                                         skb = skbn;
 174                                         skbn = skbt;
 175                                 }
 176                         } else {
 177                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 178
 179                                 if (skbn)
 180                                         skb_align(skbn, ENET_RX_ALIGN);
 181                         }
 182
 183                         if (skbn != NULL) {
 184                                 skb_put(skb, pkt_len);  /* Make room */
 185                                 skb->protocol = eth_type_trans(skb, dev);
 186                                 received++;
 187                                 netif_receive_skb(skb);
 188                         } else {
 189                                 printk(KERN_WARNING DRV_MODULE_NAME
 190                                        ": %s Memory squeeze, dropping packet.\n",
 191                                        dev->name);
 192                                 fep->stats.rx_dropped++;
 193                                 skbn = skb;
 194                         }
 195                 }
 196
 197                 fep->rx_skbuff[curidx] = skbn;
 198                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 199                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 200                              DMA_FROM_DEVICE));
 201                 CBDW_DATLEN(bdp, 0);
 202                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 203
 204                 /*
 205                  * Update BD pointer to next entry.
 206                  */
 207                 if ((sc & BD_ENET_RX_WRAP) == 0)
 208                         bdp++;
 209                 else
 210                         bdp = fep->rx_bd_base;
 211
 212                 (*fep->ops->rx_bd_done)(dev);
 213
 214                 if (received >= budget)
 215                         break;
 216         }
 217
 218         fep->cur_rx = bdp;
 219
 220         if (received >= budget) {
 221                 /* done */
 222                 netif_rx_complete(dev, napi);
 223                 (*fep->ops->napi_enable_rx)(dev);
 224         }
 225         return received;
 226 }
 227
 228 /* non NAPI receive function */
 229 static int fs_enet_rx_non_napi(struct net_device *dev)
 230 {
 231         struct fs_enet_private *fep = netdev_priv(dev);
 232         const struct fs_platform_info *fpi = fep->fpi;
 233         cbd_t __iomem *bdp;
 234         struct sk_buff *skb, *skbn, *skbt;
 235         int received = 0;
 236         u16 pkt_len, sc;
 237         int curidx;
 238         /*
 239          * First, grab all of the stats for the incoming packet.
 240          * These get messed up if we get called due to a busy condition.
 241          */
 242         bdp = fep->cur_rx;
 243
 244         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
 245
 246                 curidx = bdp - fep->rx_bd_base;
 247
 248                 /*
 249                  * Since we have allocated space to hold a complete frame,
 250                  * the last indicator should be set.
 251                  */
 252                 if ((sc & BD_ENET_RX_LAST) == 0)
 253                         printk(KERN_WARNING DRV_MODULE_NAME
 254                                ": %s rcv is not +last\n",
 255                                dev->name);
 256
 257                 /*
 258                  * Check for errors.
 259                  */
 260                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 261                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 262                         fep->stats.rx_errors++;
 263                         /* Frame too long or too short. */
 264                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 265                                 fep->stats.rx_length_errors++;
 266                         /* Frame alignment */
 267                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 268                                 fep->stats.rx_frame_errors++;
 269                         /* CRC Error */
 270                         if (sc & BD_ENET_RX_CR)
 271                                 fep->stats.rx_crc_errors++;
 272                         /* FIFO overrun */
 273                         if (sc & BD_ENET_RX_OV)
 274                                 fep->stats.rx_crc_errors++;
 275
 276                         skb = fep->rx_skbuff[curidx];
 277
 278                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 279                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 280                                 DMA_FROM_DEVICE);
 281
 282                         skbn = skb;
 283
 284                 } else {
 285
 286                         skb = fep->rx_skbuff[curidx];
 287
 288                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 289                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 290                                 DMA_FROM_DEVICE);
 291
 292                         /*
 293                          * Process the incoming frame.
 294                          */
 295                         fep->stats.rx_packets++;
 296                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 297                         fep->stats.rx_bytes += pkt_len + 4;
 298
 299                         if (pkt_len <= fpi->rx_copybreak) {
 300                                 /* +2 to make IP header L1 cache aligned */
 301                                 skbn = dev_alloc_skb(pkt_len + 2);
 302                                 if (skbn != NULL) {
 303                                         skb_reserve(skbn, 2);   /* align IP header */
 304                                         skb_copy_from_linear_data(skb,
 305                                                       skbn->data, pkt_len);
 306                                         /* swap */
 307                                         skbt = skb;
 308                                         skb = skbn;
 309                                         skbn = skbt;
 310                                 }
 311                         } else {
 312                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 313
 314                                 if (skbn)
 315                                         skb_align(skbn, ENET_RX_ALIGN);
 316                         }
 317
 318                         if (skbn != NULL) {
 319                                 skb_put(skb, pkt_len);  /* Make room */
 320                                 skb->protocol = eth_type_trans(skb, dev);
 321                                 received++;
 322                                 netif_rx(skb);
 323                         } else {
 324                                 printk(KERN_WARNING DRV_MODULE_NAME
 325                                        ": %s Memory squeeze, dropping packet.\n",
 326                                        dev->name);
 327                                 fep->stats.rx_dropped++;
 328                                 skbn = skb;
 329                         }
 330                 }
 331
 332                 fep->rx_skbuff[curidx] = skbn;
 333                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 334                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 335                              DMA_FROM_DEVICE));
 336                 CBDW_DATLEN(bdp, 0);
 337                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 338
 339                 /*
 340                  * Update BD pointer to next entry.
 341                  */
 342                 if ((sc & BD_ENET_RX_WRAP) == 0)
 343                         bdp++;
 344                 else
 345                         bdp = fep->rx_bd_base;
 346
 347                 (*fep->ops->rx_bd_done)(dev);
 348         }
 349
 350         fep->cur_rx = bdp;
 351
 352         return 0;
 353 }
 354
 355 static void fs_enet_tx(struct net_device *dev)
 356 {
 357         struct fs_enet_private *fep = netdev_priv(dev);
 358         cbd_t __iomem *bdp;
 359         struct sk_buff *skb;
 360         int dirtyidx, do_wake, do_restart;
 361         u16 sc;
 362
 363         spin_lock(&fep->tx_lock);
 364         bdp = fep->dirty_tx;
 365
 366         do_wake = do_restart = 0;
 367         while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
 368                 dirtyidx = bdp - fep->tx_bd_base;
 369
 370                 if (fep->tx_free == fep->tx_ring)
 371                         break;
 372
 373                 skb = fep->tx_skbuff[dirtyidx];
 374
 375                 /*
 376                  * Check for errors.
 377                  */
 378                 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
 379                           BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
 380
 381                         if (sc & BD_ENET_TX_HB) /* No heartbeat */
 382                                 fep->stats.tx_heartbeat_errors++;
 383                         if (sc & BD_ENET_TX_LC) /* Late collision */
 384                                 fep->stats.tx_window_errors++;
 385                         if (sc & BD_ENET_TX_RL) /* Retrans limit */
 386                                 fep->stats.tx_aborted_errors++;
 387                         if (sc & BD_ENET_TX_UN) /* Underrun */
 388                                 fep->stats.tx_fifo_errors++;
 389                         if (sc & BD_ENET_TX_CSL)        /* Carrier lost */
 390                                 fep->stats.tx_carrier_errors++;
 391
 392                         if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
 393                                 fep->stats.tx_errors++;
 394                                 do_restart = 1;
 395                         }
 396                 } else
 397                         fep->stats.tx_packets++;
 398
 399                 if (sc & BD_ENET_TX_READY)
 400                         printk(KERN_WARNING DRV_MODULE_NAME
 401                                ": %s HEY! Enet xmit interrupt and TX_READY.\n",
 402                                dev->name);
 403
 404                 /*
 405                  * Deferred means some collisions occurred during transmit,
 406                  * but we eventually sent the packet OK.
 407                  */
 408                 if (sc & BD_ENET_TX_DEF)
 409                         fep->stats.collisions++;
 410
 411                 /* unmap */
 412                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 413                                 skb->len, DMA_TO_DEVICE);
 414
 415                 /*
 416                  * Free the sk buffer associated with this last transmit.
 417                  */
 418                 dev_kfree_skb_irq(skb);
 419                 fep->tx_skbuff[dirtyidx] = NULL;
 420
 421                 /*
 422                  * Update pointer to next buffer descriptor to be transmitted.
 423                  */
 424                 if ((sc & BD_ENET_TX_WRAP) == 0)
 425                         bdp++;
 426                 else
 427                         bdp = fep->tx_bd_base;
 428
 429                 /*
 430                  * Since we have freed up a buffer, the ring is no longer
 431                  * full.
 432                  */
 433                 if (!fep->tx_free++)
 434                         do_wake = 1;
 435         }
 436
 437         fep->dirty_tx = bdp;
 438
 439         if (do_restart)
 440                 (*fep->ops->tx_restart)(dev);
 441
 442         spin_unlock(&fep->tx_lock);
 443
 444         if (do_wake)
 445                 netif_wake_queue(dev);
 446 }
 447
 448 /*
 449  * The interrupt handler.
 450  * This is called from the MPC core interrupt.
 451  */
 452 static irqreturn_t
 453 fs_enet_interrupt(int irq, void *dev_id)
 454 {
 455         struct net_device *dev = dev_id;
 456         struct fs_enet_private *fep;
 457         const struct fs_platform_info *fpi;
 458         u32 int_events;
 459         u32 int_clr_events;
 460         int nr, napi_ok;
 461         int handled;
 462
 463         fep = netdev_priv(dev);
 464         fpi = fep->fpi;
 465
 466         nr = 0;
 467         while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
 468                 nr++;
 469
 470                 int_clr_events = int_events;
 471                 if (fpi->use_napi)
 472                         int_clr_events &= ~fep->ev_napi_rx;
 473
 474                 (*fep->ops->clear_int_events)(dev, int_clr_events);
 475
 476                 if (int_events & fep->ev_err)
 477                         (*fep->ops->ev_error)(dev, int_events);
 478
 479                 if (int_events & fep->ev_rx) {
 480                         if (!fpi->use_napi)
 481                                 fs_enet_rx_non_napi(dev);
 482                         else {
 483                                 napi_ok = napi_schedule_prep(&fep->napi);
 484
 485                                 (*fep->ops->napi_disable_rx)(dev);
 486                                 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
 487
 488                                 /* NOTE: it is possible for FCCs in NAPI mode    */
 489                                 /* to submit a spurious interrupt while in poll  */
 490                                 if (napi_ok)
 491                                         __netif_rx_schedule(dev, &fep->napi);
 492                         }
 493                 }
 494
 495                 if (int_events & fep->ev_tx)
 496                         fs_enet_tx(dev);
 497         }
 498
 499         handled = nr > 0;
 500         return IRQ_RETVAL(handled);
 501 }
 502
 503 void fs_init_bds(struct net_device *dev)
 504 {
 505         struct fs_enet_private *fep = netdev_priv(dev);
 506         cbd_t __iomem *bdp;
 507         struct sk_buff *skb;
 508         int i;
 509
 510         fs_cleanup_bds(dev);
 511
 512         fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
 513         fep->tx_free = fep->tx_ring;
 514         fep->cur_rx = fep->rx_bd_base;
 515
 516         /*
 517          * Initialize the receive buffer descriptors.
 518          */
 519         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 520                 skb = dev_alloc_skb(ENET_RX_FRSIZE);
 521                 if (skb == NULL) {
 522                         printk(KERN_WARNING DRV_MODULE_NAME
 523                                ": %s Memory squeeze, unable to allocate skb\n",
 524                                dev->name);
 525                         break;
 526                 }
 527                 skb_align(skb, ENET_RX_ALIGN);
 528                 fep->rx_skbuff[i] = skb;
 529                 CBDW_BUFADDR(bdp,
 530                         dma_map_single(fep->dev, skb->data,
 531                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 532                                 DMA_FROM_DEVICE));
 533                 CBDW_DATLEN(bdp, 0);    /* zero */
 534                 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
 535                         ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
 536         }
 537         /*
 538          * if we failed, fillup remainder
 539          */
 540         for (; i < fep->rx_ring; i++, bdp++) {
 541                 fep->rx_skbuff[i] = NULL;
 542                 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
 543         }
 544
 545         /*
 546          * ...and the same for transmit.
 547          */
 548         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 549                 fep->tx_skbuff[i] = NULL;
 550                 CBDW_BUFADDR(bdp, 0);
 551                 CBDW_DATLEN(bdp, 0);
 552                 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
 553         }
 554 }
 555
 556 void fs_cleanup_bds(struct net_device *dev)
 557 {
 558         struct fs_enet_private *fep = netdev_priv(dev);
 559         struct sk_buff *skb;
 560         cbd_t __iomem *bdp;
 561         int i;
 562
 563         /*
 564          * Reset SKB transmit buffers.
 565          */
 566         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 567                 if ((skb = fep->tx_skbuff[i]) == NULL)
 568                         continue;
 569
 570                 /* unmap */
 571                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 572                                 skb->len, DMA_TO_DEVICE);
 573
 574                 fep->tx_skbuff[i] = NULL;
 575                 dev_kfree_skb(skb);
 576         }
 577
 578         /*
 579          * Reset SKB receive buffers
 580          */
 581         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 582                 if ((skb = fep->rx_skbuff[i]) == NULL)
 583                         continue;
 584
 585                 /* unmap */
 586                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 587                         L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 588                         DMA_FROM_DEVICE);
 589
 590                 fep->rx_skbuff[i] = NULL;
 591
 592                 dev_kfree_skb(skb);
 593         }
 594 }
 595
 596 /**********************************************************************************/
 597
 598 static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 599 {
 600         struct fs_enet_private *fep = netdev_priv(dev);
 601         cbd_t __iomem *bdp;
 602         int curidx;
 603         u16 sc;
 604         unsigned long flags;
 605
 606         spin_lock_irqsave(&fep->tx_lock, flags);
 607
 608         /*
 609          * Fill in a Tx ring entry
 610          */
 611         bdp = fep->cur_tx;
 612
 613         if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
 614                 netif_stop_queue(dev);
 615                 spin_unlock_irqrestore(&fep->tx_lock, flags);
 616
 617                 /*
 618                  * Ooops.  All transmit buffers are full.  Bail out.
 619                  * This should not happen, since the tx queue should be stopped.
 620                  */
 621                 printk(KERN_WARNING DRV_MODULE_NAME
 622                        ": %s tx queue full!.\n", dev->name);
 623                 return NETDEV_TX_BUSY;
 624         }
 625
 626         curidx = bdp - fep->tx_bd_base;
 627         /*
 628          * Clear all of the status flags.
 629          */
 630         CBDC_SC(bdp, BD_ENET_TX_STATS);
 631
 632         /*
 633          * Save skb pointer.
 634          */
 635         fep->tx_skbuff[curidx] = skb;
 636
 637         fep->stats.tx_bytes += skb->len;
 638
 639         /*
 640          * Push the data cache so the CPM does not get stale memory data.
 641          */
 642         CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
 643                                 skb->data, skb->len, DMA_TO_DEVICE));
 644         CBDW_DATLEN(bdp, skb->len);
 645
 646         dev->trans_start = jiffies;
 647
 648         /*
 649          * If this was the last BD in the ring, start at the beginning again.
 650          */
 651         if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
 652                 fep->cur_tx++;
 653         else
 654                 fep->cur_tx = fep->tx_bd_base;
 655
 656         if (!--fep->tx_free)
 657                 netif_stop_queue(dev);
 658
 659         /* Trigger transmission start */
 660         sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
 661              BD_ENET_TX_LAST | BD_ENET_TX_TC;
 662
 663         /* note that while FEC does not have this bit
 664          * it marks it as available for software use
 665          * yay for hw reuse :) */
 666         if (skb->len <= 60)
 667                 sc |= BD_ENET_TX_PAD;
 668         CBDS_SC(bdp, sc);
 669
 670         (*fep->ops->tx_kickstart)(dev);
 671
 672         spin_unlock_irqrestore(&fep->tx_lock, flags);
 673
 674         return NETDEV_TX_OK;
 675 }
 676
 677 static int fs_request_irq(struct net_device *dev, int irq, const char *name,
 678                 irq_handler_t irqf)
 679 {
 680         struct fs_enet_private *fep = netdev_priv(dev);
 681
 682         (*fep->ops->pre_request_irq)(dev, irq);
 683         return request_irq(irq, irqf, IRQF_SHARED, name, dev);
 684 }
 685
 686 static void fs_free_irq(struct net_device *dev, int irq)
 687 {
 688         struct fs_enet_private *fep = netdev_priv(dev);
 689
 690         free_irq(irq, dev);
 691         (*fep->ops->post_free_irq)(dev, irq);
 692 }
 693
 694 static void fs_timeout(struct net_device *dev)
 695 {
 696         struct fs_enet_private *fep = netdev_priv(dev);
 697         unsigned long flags;
 698         int wake = 0;
 699
 700         fep->stats.tx_errors++;
 701
 702         spin_lock_irqsave(&fep->lock, flags);
 703
 704         if (dev->flags & IFF_UP) {
 705                 phy_stop(fep->phydev);
 706                 (*fep->ops->stop)(dev);
 707                 (*fep->ops->restart)(dev);
 708                 phy_start(fep->phydev);
 709         }
 710
 711         phy_start(fep->phydev);
 712         wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
 713         spin_unlock_irqrestore(&fep->lock, flags);
 714
 715         if (wake)
 716                 netif_wake_queue(dev);
 717 }
 718
 719 /*-----------------------------------------------------------------------------
 720  *  generic link-change handler - should be sufficient for most cases
 721  *-----------------------------------------------------------------------------*/
 722 static void generic_adjust_link(struct  net_device *dev)
 723 {
 724         struct fs_enet_private *fep = netdev_priv(dev);
 725         struct phy_device *phydev = fep->phydev;
 726         int new_state = 0;
 727
 728         if (phydev->link) {
 729                 /* adjust to duplex mode */
 730                 if (phydev->duplex != fep->oldduplex) {
 731                         new_state = 1;
 732                         fep->oldduplex = phydev->duplex;
 733                 }
 734
 735                 if (phydev->speed != fep->oldspeed) {
 736                         new_state = 1;
 737                         fep->oldspeed = phydev->speed;
 738                 }
 739
 740                 if (!fep->oldlink) {
 741                         new_state = 1;
 742                         fep->oldlink = 1;
 743                         netif_schedule(dev);
 744                         netif_carrier_on(dev);
 745                         netif_start_queue(dev);
 746                 }
 747
 748                 if (new_state)
 749                         fep->ops->restart(dev);
 750         } else if (fep->oldlink) {
 751                 new_state = 1;
 752                 fep->oldlink = 0;
 753                 fep->oldspeed = 0;
 754                 fep->oldduplex = -1;
 755                 netif_carrier_off(dev);
 756                 netif_stop_queue(dev);
 757         }
 758
 759         if (new_state && netif_msg_link(fep))
 760                 phy_print_status(phydev);
 761 }
 762
 763
 764 static void fs_adjust_link(struct net_device *dev)
 765 {
 766         struct fs_enet_private *fep = netdev_priv(dev);
 767         unsigned long flags;
 768
 769         spin_lock_irqsave(&fep->lock, flags);
 770
 771         if(fep->ops->adjust_link)
 772                 fep->ops->adjust_link(dev);
 773         else
 774                 generic_adjust_link(dev);
 775
 776         spin_unlock_irqrestore(&fep->lock, flags);
 777 }
 778
 779 static int fs_init_phy(struct net_device *dev)
 780 {
 781         struct fs_enet_private *fep = netdev_priv(dev);
 782         struct phy_device *phydev;
 783
 784         fep->oldlink = 0;
 785         fep->oldspeed = 0;
 786         fep->oldduplex = -1;
 787         if(fep->fpi->bus_id)
 788                 phydev = phy_connect(dev, fep->fpi->bus_id, &fs_adjust_link, 0,
 789                                 PHY_INTERFACE_MODE_MII);
 790         else {
 791                 printk("No phy bus ID specified in BSP code\n");
 792                 return -EINVAL;
 793         }
 794         if (IS_ERR(phydev)) {
 795                 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
 796                 return PTR_ERR(phydev);
 797         }
 798
 799         fep->phydev = phydev;
 800
 801         return 0;
 802 }
 803
 804 static int fs_enet_open(struct net_device *dev)
 805 {
 806         struct fs_enet_private *fep = netdev_priv(dev);
 807         int r;
 808         int err;
 809
 810         napi_enable(&fep->napi);
 811
 812         /* Install our interrupt handler. */
 813         r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
 814         if (r != 0) {
 815                 printk(KERN_ERR DRV_MODULE_NAME
 816                        ": %s Could not allocate FS_ENET IRQ!", dev->name);
 817                 napi_disable(&fep->napi);
 818                 return -EINVAL;
 819         }
 820
 821         err = fs_init_phy(dev);
 822         if(err) {
 823                 napi_disable(&fep->napi);
 824                 return err;
 825         }
 826         phy_start(fep->phydev);
 827
 828         return 0;
 829 }
 830
 831 static int fs_enet_close(struct net_device *dev)
 832 {
 833         struct fs_enet_private *fep = netdev_priv(dev);
 834         unsigned long flags;
 835
 836         netif_stop_queue(dev);
 837         netif_carrier_off(dev);
 838         napi_disable(&fep->napi);
 839         phy_stop(fep->phydev);
 840
 841         spin_lock_irqsave(&fep->lock, flags);
 842         spin_lock(&fep->tx_lock);
 843         (*fep->ops->stop)(dev);
 844         spin_unlock(&fep->tx_lock);
 845         spin_unlock_irqrestore(&fep->lock, flags);
 846
 847         /* release any irqs */
 848         phy_disconnect(fep->phydev);
 849         fep->phydev = NULL;
 850         fs_free_irq(dev, fep->interrupt);
 851
 852         return 0;
 853 }
 854
 855 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
 856 {
 857         struct fs_enet_private *fep = netdev_priv(dev);
 858         return &fep->stats;
 859 }
 860
 861 /*************************************************************************/
 862
 863 static void fs_get_drvinfo(struct net_device *dev,
 864                             struct ethtool_drvinfo *info)
 865 {
 866         strcpy(info->driver, DRV_MODULE_NAME);
 867         strcpy(info->version, DRV_MODULE_VERSION);
 868 }
 869
 870 static int fs_get_regs_len(struct net_device *dev)
 871 {
 872         struct fs_enet_private *fep = netdev_priv(dev);
 873
 874         return (*fep->ops->get_regs_len)(dev);
 875 }
 876
 877 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 878                          void *p)
 879 {
 880         struct fs_enet_private *fep = netdev_priv(dev);
 881         unsigned long flags;
 882         int r, len;
 883
 884         len = regs->len;
 885
 886         spin_lock_irqsave(&fep->lock, flags);
 887         r = (*fep->ops->get_regs)(dev, p, &len);
 888         spin_unlock_irqrestore(&fep->lock, flags);
 889
 890         if (r == 0)
 891                 regs->version = 0;
 892 }
 893
 894 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 895 {
 896         struct fs_enet_private *fep = netdev_priv(dev);
 897         return phy_ethtool_gset(fep->phydev, cmd);
 898 }
 899
 900 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 901 {
 902         struct fs_enet_private *fep = netdev_priv(dev);
 903         phy_ethtool_sset(fep->phydev, cmd);
 904         return 0;
 905 }
 906
 907 static int fs_nway_reset(struct net_device *dev)
 908 {
 909         return 0;
 910 }
 911
 912 static u32 fs_get_msglevel(struct net_device *dev)
 913 {
 914         struct fs_enet_private *fep = netdev_priv(dev);
 915         return fep->msg_enable;
 916 }
 917
 918 static void fs_set_msglevel(struct net_device *dev, u32 value)
 919 {
 920         struct fs_enet_private *fep = netdev_priv(dev);
 921         fep->msg_enable = value;
 922 }
 923
 924 static const struct ethtool_ops fs_ethtool_ops = {
 925         .get_drvinfo = fs_get_drvinfo,
 926         .get_regs_len = fs_get_regs_len,
 927         .get_settings = fs_get_settings,
 928         .set_settings = fs_set_settings,
 929         .nway_reset = fs_nway_reset,
 930         .get_link = ethtool_op_get_link,
 931         .get_msglevel = fs_get_msglevel,
 932         .set_msglevel = fs_set_msglevel,
 933         .set_tx_csum = ethtool_op_set_tx_csum,  /* local! */
 934         .set_sg = ethtool_op_set_sg,
 935         .get_regs = fs_get_regs,
 936 };
 937
 938 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 939 {
 940         struct fs_enet_private *fep = netdev_priv(dev);
 941         struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
 942         unsigned long flags;
 943         int rc;
 944
 945         if (!netif_running(dev))
 946                 return -EINVAL;
 947
 948         spin_lock_irqsave(&fep->lock, flags);
 949         rc = phy_mii_ioctl(fep->phydev, mii, cmd);
 950         spin_unlock_irqrestore(&fep->lock, flags);
 951         return rc;
 952 }
 953
 954 extern int fs_mii_connect(struct net_device *dev);
 955 extern void fs_mii_disconnect(struct net_device *dev);
 956
 957 #ifndef CONFIG_PPC_CPM_NEW_BINDING
 958 static struct net_device *fs_init_instance(struct device *dev,
 959                 struct fs_platform_info *fpi)
 960 {
 961         struct net_device *ndev = NULL;
 962         struct fs_enet_private *fep = NULL;
 963         int privsize, i, r, err = 0, registered = 0;
 964
 965         fpi->fs_no = fs_get_id(fpi);
 966         /* guard */
 967         if ((unsigned int)fpi->fs_no >= FS_MAX_INDEX)
 968                 return ERR_PTR(-EINVAL);
 969
 970         privsize = sizeof(*fep) + (sizeof(struct sk_buff **) *
 971                             (fpi->rx_ring + fpi->tx_ring));
 972
 973         ndev = alloc_etherdev(privsize);
 974         if (!ndev) {
 975                 err = -ENOMEM;
 976                 goto err;
 977         }
 978
 979         fep = netdev_priv(ndev);
 980
 981         fep->dev = dev;
 982         dev_set_drvdata(dev, ndev);
 983         fep->fpi = fpi;
 984         if (fpi->init_ioports)
 985                 fpi->init_ioports((struct fs_platform_info *)fpi);
 986
 987 #ifdef CONFIG_FS_ENET_HAS_FEC
 988         if (fs_get_fec_index(fpi->fs_no) >= 0)
 989                 fep->ops = &fs_fec_ops;
 990 #endif
 991
 992 #ifdef CONFIG_FS_ENET_HAS_SCC
 993         if (fs_get_scc_index(fpi->fs_no) >=0)
 994                 fep->ops = &fs_scc_ops;
 995 #endif
 996
 997 #ifdef CONFIG_FS_ENET_HAS_FCC
 998         if (fs_get_fcc_index(fpi->fs_no) >= 0)
 999                 fep->ops = &fs_fcc_ops;
1000 #endif
1001
1002         if (fep->ops == NULL) {
1003                 printk(KERN_ERR DRV_MODULE_NAME
1004                        ": %s No matching ops found (%d).\n",
1005                        ndev->name, fpi->fs_no);
1006                 err = -EINVAL;
1007                 goto err;
1008         }
1009
1010         r = (*fep->ops->setup_data)(ndev);
1011         if (r != 0) {
1012                 printk(KERN_ERR DRV_MODULE_NAME
1013                        ": %s setup_data failed\n",
1014                         ndev->name);
1015                 err = r;
1016                 goto err;
1017         }
1018
1019         /* point rx_skbuff, tx_skbuff */
1020         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1021         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1022
1023         /* init locks */
1024         spin_lock_init(&fep->lock);
1025         spin_lock_init(&fep->tx_lock);
1026
1027         /*
1028          * Set the Ethernet address.
1029          */
1030         for (i = 0; i < 6; i++)
1031                 ndev->dev_addr[i] = fpi->macaddr[i];
1032
1033         r = (*fep->ops->allocate_bd)(ndev);
1034
1035         if (fep->ring_base == NULL) {
1036                 printk(KERN_ERR DRV_MODULE_NAME
1037                        ": %s buffer descriptor alloc failed (%d).\n", ndev->name, r);
1038                 err = r;
1039                 goto err;
1040         }
1041
1042         /*
1043          * Set receive and transmit descriptor base.
1044          */
1045         fep->rx_bd_base = fep->ring_base;
1046         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1047
1048         /* initialize ring size variables */
1049         fep->tx_ring = fpi->tx_ring;
1050         fep->rx_ring = fpi->rx_ring;
1051
1052         /*
1053          * The FEC Ethernet specific entries in the device structure.
1054          */
1055         ndev->open = fs_enet_open;
1056         ndev->hard_start_xmit = fs_enet_start_xmit;
1057         ndev->tx_timeout = fs_timeout;
1058         ndev->watchdog_timeo = 2 * HZ;
1059         ndev->stop = fs_enet_close;
1060         ndev->get_stats = fs_enet_get_stats;
1061         ndev->set_multicast_list = fs_set_multicast_list;
1062
1063 #ifdef CONFIG_NET_POLL_CONTROLLER
1064         ndev->poll_controller = fs_enet_netpoll;
1065 #endif
1066
1067         netif_napi_add(ndev, &fep->napi,
1068                        fs_enet_rx_napi, fpi->napi_weight);
1069
1070         ndev->ethtool_ops = &fs_ethtool_ops;
1071         ndev->do_ioctl = fs_ioctl;
1072
1073         init_timer(&fep->phy_timer_list);
1074
1075         netif_carrier_off(ndev);
1076
1077         err = register_netdev(ndev);
1078         if (err != 0) {
1079                 printk(KERN_ERR DRV_MODULE_NAME
1080                        ": %s register_netdev failed.\n", ndev->name);
1081                 goto err;
1082         }
1083         registered = 1;
1084
1085
1086         return ndev;
1087
1088 err:
1089         if (ndev != NULL) {
1090                 if (registered)
1091                         unregister_netdev(ndev);
1092
1093                 if (fep != NULL) {
1094                         (*fep->ops->free_bd)(ndev);
1095                         (*fep->ops->cleanup_data)(ndev);
1096                 }
1097
1098                 free_netdev(ndev);
1099         }
1100
1101         dev_set_drvdata(dev, NULL);
1102
1103         return ERR_PTR(err);
1104 }
1105
1106 static int fs_cleanup_instance(struct net_device *ndev)
1107 {
1108         struct fs_enet_private *fep;
1109         const struct fs_platform_info *fpi;
1110         struct device *dev;
1111
1112         if (ndev == NULL)
1113                 return -EINVAL;
1114
1115         fep = netdev_priv(ndev);
1116         if (fep == NULL)
1117                 return -EINVAL;
1118
1119         fpi = fep->fpi;
1120
1121         unregister_netdev(ndev);
1122
1123         dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
1124                           (void __force *)fep->ring_base, fep->ring_mem_addr);
1125
1126         /* reset it */
1127         (*fep->ops->cleanup_data)(ndev);
1128
1129         dev = fep->dev;
1130         if (dev != NULL) {
1131                 dev_set_drvdata(dev, NULL);
1132                 fep->dev = NULL;
1133         }
1134
1135         free_netdev(ndev);
1136
1137         return 0;
1138 }
1139 #endif
1140
1141 /**************************************************************************************/
1142
1143 /* handy pointer to the immap */
1144 void __iomem *fs_enet_immap = NULL;
1145
1146 static int setup_immap(void)
1147 {
1148 #ifdef CONFIG_CPM1
1149         fs_enet_immap = ioremap(IMAP_ADDR, 0x4000);
1150         WARN_ON(!fs_enet_immap);
1151 #elif defined(CONFIG_CPM2)
1152         fs_enet_immap = cpm2_immr;
1153 #endif
1154
1155         return 0;
1156 }
1157
1158 static void cleanup_immap(void)
1159 {
1160 #if defined(CONFIG_CPM1)
1161         iounmap(fs_enet_immap);
1162 #endif
1163 }
1164
1165 /**************************************************************************************/
1166
1167 #ifdef CONFIG_PPC_CPM_NEW_BINDING
1168 static int __devinit find_phy(struct device_node *np,
1169                               struct fs_platform_info *fpi)
1170 {
1171         struct device_node *phynode, *mdionode;
1172         struct resource res;
1173         int ret = 0, len;
1174
1175         const u32 *data = of_get_property(np, "phy-handle", &len);
1176         if (!data || len != 4)
1177                 return -EINVAL;
1178
1179         phynode = of_find_node_by_phandle(*data);
1180         if (!phynode)
1181                 return -EINVAL;
1182
1183         mdionode = of_get_parent(phynode);
1184         if (!mdionode)
1185                 goto out_put_phy;
1186
1187         ret = of_address_to_resource(mdionode, 0, &res);
1188         if (ret)
1189                 goto out_put_mdio;
1190
1191         data = of_get_property(phynode, "reg", &len);
1192         if (!data || len != 4)
1193                 goto out_put_mdio;
1194
1195         snprintf(fpi->bus_id, 16, PHY_ID_FMT, res.start, *data);
1196
1197 out_put_mdio:
1198         of_node_put(mdionode);
1199 out_put_phy:
1200         of_node_put(phynode);
1201         return ret;
1202 }
1203
1204 #ifdef CONFIG_FS_ENET_HAS_FEC
1205 #define IS_FEC(match) ((match)->data == &fs_fec_ops)
1206 #else
1207 #define IS_FEC(match) 0
1208 #endif
1209
1210 static int __devinit fs_enet_probe(struct of_device *ofdev,
1211                                    const struct of_device_id *match)
1212 {
1213         struct net_device *ndev;
1214         struct fs_enet_private *fep;
1215         struct fs_platform_info *fpi;
1216         const u32 *data;
1217         const u8 *mac_addr;
1218         int privsize, len, ret = -ENODEV;
1219
1220         fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
1221         if (!fpi)
1222                 return -ENOMEM;
1223
1224         if (!IS_FEC(match)) {
1225                 data = of_get_property(ofdev->node, "fsl,cpm-command", &len);
1226                 if (!data || len != 4)
1227                         goto out_free_fpi;
1228
1229                 fpi->cp_command = *data;
1230         }
1231
1232         fpi->rx_ring = 32;
1233         fpi->tx_ring = 32;
1234         fpi->rx_copybreak = 240;
1235         fpi->use_napi = 0;
1236         fpi->napi_weight = 17;
1237
1238         ret = find_phy(ofdev->node, fpi);
1239         if (ret)
1240                 goto out_free_fpi;
1241
1242         privsize = sizeof(*fep) +
1243                    sizeof(struct sk_buff **) *
1244                    (fpi->rx_ring + fpi->tx_ring);
1245
1246         ndev = alloc_etherdev(privsize);
1247         if (!ndev) {
1248                 ret = -ENOMEM;
1249                 goto out_free_fpi;
1250         }
1251
1252         SET_MODULE_OWNER(ndev);
1253         dev_set_drvdata(&ofdev->dev, ndev);
1254
1255         fep = netdev_priv(ndev);
1256         fep->dev = &ofdev->dev;
1257         fep->fpi = fpi;
1258         fep->ops = match->data;
1259
1260         ret = fep->ops->setup_data(ndev);
1261         if (ret)
1262                 goto out_free_dev;
1263
1264         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1265         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1266
1267         spin_lock_init(&fep->lock);
1268         spin_lock_init(&fep->tx_lock);
1269
1270         mac_addr = of_get_mac_address(ofdev->node);
1271         if (mac_addr)
1272                 memcpy(ndev->dev_addr, mac_addr, 6);
1273
1274         ret = fep->ops->allocate_bd(ndev);
1275         if (ret)
1276                 goto out_cleanup_data;
1277
1278         fep->rx_bd_base = fep->ring_base;
1279         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1280
1281         fep->tx_ring = fpi->tx_ring;
1282         fep->rx_ring = fpi->rx_ring;
1283
1284         ndev->open = fs_enet_open;
1285         ndev->hard_start_xmit = fs_enet_start_xmit;
1286         ndev->tx_timeout = fs_timeout;
1287         ndev->watchdog_timeo = 2 * HZ;
1288         ndev->stop = fs_enet_close;
1289         ndev->get_stats = fs_enet_get_stats;
1290         ndev->set_multicast_list = fs_set_multicast_list;
1291         if (fpi->use_napi) {
1292                 ndev->poll = fs_enet_rx_napi;
1293                 ndev->weight = fpi->napi_weight;
1294         }
1295         ndev->ethtool_ops = &fs_ethtool_ops;
1296         ndev->do_ioctl = fs_ioctl;
1297
1298         init_timer(&fep->phy_timer_list);
1299
1300         netif_carrier_off(ndev);
1301
1302         ret = register_netdev(ndev);
1303         if (ret)
1304                 goto out_free_bd;
1305
1306         printk(KERN_INFO "%s: fs_enet: %02x:%02x:%02x:%02x:%02x:%02x\n",
1307                ndev->name,
1308                ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
1309                ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
1310
1311         return 0;
1312
1313 out_free_bd:
1314         fep->ops->free_bd(ndev);
1315 out_cleanup_data:
1316         fep->ops->cleanup_data(ndev);
1317 out_free_dev:
1318         free_netdev(ndev);
1319         dev_set_drvdata(&ofdev->dev, NULL);
1320 out_free_fpi:
1321         kfree(fpi);
1322         return ret;
1323 }
1324
1325 static int fs_enet_remove(struct of_device *ofdev)
1326 {
1327         struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
1328         struct fs_enet_private *fep = netdev_priv(ndev);
1329
1330         unregister_netdev(ndev);
1331
1332         fep->ops->free_bd(ndev);
1333         fep->ops->cleanup_data(ndev);
1334         dev_set_drvdata(fep->dev, NULL);
1335
1336         free_netdev(ndev);
1337         return 0;
1338 }
1339
1340 static struct of_device_id fs_enet_match[] = {
1341 #ifdef CONFIG_FS_ENET_HAS_SCC
1342         {
1343                 .compatible = "fsl,cpm1-scc-enet",
1344                 .data = (void *)&fs_scc_ops,
1345         },
1346 #endif
1347 #ifdef CONFIG_FS_ENET_HAS_FCC
1348         {
1349                 .compatible = "fsl,cpm2-fcc-enet",
1350                 .data = (void *)&fs_fcc_ops,
1351         },
1352 #endif
1353 #ifdef CONFIG_FS_ENET_HAS_FEC
1354         {
1355                 .compatible = "fsl,pq1-fec-enet",
1356                 .data = (void *)&fs_fec_ops,
1357         },
1358 #endif
1359         {}
1360 };
1361
1362 static struct of_platform_driver fs_enet_driver = {
1363         .name   = "fs_enet",
1364         .match_table = fs_enet_match,
1365         .probe = fs_enet_probe,
1366         .remove = fs_enet_remove,
1367 };
1368
1369 static int __init fs_init(void)
1370 {
1371         int r = setup_immap();
1372         if (r != 0)
1373                 return r;
1374
1375         r = of_register_platform_driver(&fs_enet_driver);
1376         if (r != 0)
1377                 goto out;
1378
1379         return 0;
1380
1381 out:
1382         cleanup_immap();
1383         return r;
1384 }
1385
1386 static void __exit fs_cleanup(void)
1387 {
1388         of_unregister_platform_driver(&fs_enet_driver);
1389         cleanup_immap();
1390 }
1391 #else
1392 static int __devinit fs_enet_probe(struct device *dev)
1393 {
1394         struct net_device *ndev;
1395
1396         /* no fixup - no device */
1397         if (dev->platform_data == NULL) {
1398                 printk(KERN_INFO "fs_enet: "
1399                                 "probe called with no platform data; "
1400                                 "remove unused devices\n");
1401                 return -ENODEV;
1402         }
1403
1404         ndev = fs_init_instance(dev, dev->platform_data);
1405         if (IS_ERR(ndev))
1406                 return PTR_ERR(ndev);
1407         return 0;
1408 }
1409
1410 static int fs_enet_remove(struct device *dev)
1411 {
1412         return fs_cleanup_instance(dev_get_drvdata(dev));
1413 }
1414
1415 static struct device_driver fs_enet_fec_driver = {
1416         .name           = "fsl-cpm-fec",
1417         .bus            = &platform_bus_type,
1418         .probe          = fs_enet_probe,
1419         .remove         = fs_enet_remove,
1420 #ifdef CONFIG_PM
1421 /*      .suspend        = fs_enet_suspend,      TODO */
1422 /*      .resume         = fs_enet_resume,       TODO */
1423 #endif
1424 };
1425
1426 static struct device_driver fs_enet_scc_driver = {
1427         .name           = "fsl-cpm-scc",
1428         .bus            = &platform_bus_type,
1429         .probe          = fs_enet_probe,
1430         .remove         = fs_enet_remove,
1431 #ifdef CONFIG_PM
1432 /*      .suspend        = fs_enet_suspend,      TODO */
1433 /*      .resume         = fs_enet_resume,       TODO */
1434 #endif
1435 };
1436
1437 static struct device_driver fs_enet_fcc_driver = {
1438         .name           = "fsl-cpm-fcc",
1439         .bus            = &platform_bus_type,
1440         .probe          = fs_enet_probe,
1441         .remove         = fs_enet_remove,
1442 #ifdef CONFIG_PM
1443 /*      .suspend        = fs_enet_suspend,      TODO */
1444 /*      .resume         = fs_enet_resume,       TODO */
1445 #endif
1446 };
1447
1448 static int __init fs_init(void)
1449 {
1450         int r;
1451
1452         printk(KERN_INFO
1453                         "%s", version);
1454
1455         r = setup_immap();
1456         if (r != 0)
1457                 return r;
1458
1459 #ifdef CONFIG_FS_ENET_HAS_FCC
1460         /* let's insert mii stuff */
1461         r = fs_enet_mdio_bb_init();
1462
1463         if (r != 0) {
1464                 printk(KERN_ERR DRV_MODULE_NAME
1465                         "BB PHY init failed.\n");
1466                 return r;
1467         }
1468         r = driver_register(&fs_enet_fcc_driver);
1469         if (r != 0)
1470                 goto err;
1471 #endif
1472
1473 #ifdef CONFIG_FS_ENET_HAS_FEC
1474         r =  fs_enet_mdio_fec_init();
1475         if (r != 0) {
1476                 printk(KERN_ERR DRV_MODULE_NAME
1477                         "FEC PHY init failed.\n");
1478                 return r;
1479         }
1480
1481         r = driver_register(&fs_enet_fec_driver);
1482         if (r != 0)
1483                 goto err;
1484 #endif
1485
1486 #ifdef CONFIG_FS_ENET_HAS_SCC
1487         r = driver_register(&fs_enet_scc_driver);
1488         if (r != 0)
1489                 goto err;
1490 #endif
1491
1492         return 0;
1493 err:
1494         cleanup_immap();
1495         return r;
1496 }
1497
1498 static void __exit fs_cleanup(void)
1499 {
1500         driver_unregister(&fs_enet_fec_driver);
1501         driver_unregister(&fs_enet_fcc_driver);
1502         driver_unregister(&fs_enet_scc_driver);
1503         cleanup_immap();
1504 }
1505 #endif
1506
1507 #ifdef CONFIG_NET_POLL_CONTROLLER
1508 static void fs_enet_netpoll(struct net_device *dev)
1509 {
1510        disable_irq(dev->irq);
1511        fs_enet_interrupt(dev->irq, dev, NULL);
1512        enable_irq(dev->irq);
1513 }
1514 #endif
1515
1516 /**************************************************************************************/
1517
1518 module_init(fs_init);
1519 module_exit(fs_cleanup);