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 = fep->ndev;
  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         if (fep->fpi->use_napi)
 811                 napi_enable(&fep->napi);
 812
 813         /* Install our interrupt handler. */
 814         r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
 815         if (r != 0) {
 816                 printk(KERN_ERR DRV_MODULE_NAME
 817                        ": %s Could not allocate FS_ENET IRQ!", dev->name);
 818                 if (fep->fpi->use_napi)
 819                         napi_disable(&fep->napi);
 820                 return -EINVAL;
 821         }
 822
 823         err = fs_init_phy(dev);
 824         if (err) {
 825                 if (fep->fpi->use_napi)
 826                         napi_disable(&fep->napi);
 827                 return err;
 828         }
 829         phy_start(fep->phydev);
 830
 831         return 0;
 832 }
 833
 834 static int fs_enet_close(struct net_device *dev)
 835 {
 836         struct fs_enet_private *fep = netdev_priv(dev);
 837         unsigned long flags;
 838
 839         netif_stop_queue(dev);
 840         netif_carrier_off(dev);
 841         napi_disable(&fep->napi);
 842         phy_stop(fep->phydev);
 843
 844         spin_lock_irqsave(&fep->lock, flags);
 845         spin_lock(&fep->tx_lock);
 846         (*fep->ops->stop)(dev);
 847         spin_unlock(&fep->tx_lock);
 848         spin_unlock_irqrestore(&fep->lock, flags);
 849
 850         /* release any irqs */
 851         phy_disconnect(fep->phydev);
 852         fep->phydev = NULL;
 853         fs_free_irq(dev, fep->interrupt);
 854
 855         return 0;
 856 }
 857
 858 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
 859 {
 860         struct fs_enet_private *fep = netdev_priv(dev);
 861         return &fep->stats;
 862 }
 863
 864 /*************************************************************************/
 865
 866 static void fs_get_drvinfo(struct net_device *dev,
 867                             struct ethtool_drvinfo *info)
 868 {
 869         strcpy(info->driver, DRV_MODULE_NAME);
 870         strcpy(info->version, DRV_MODULE_VERSION);
 871 }
 872
 873 static int fs_get_regs_len(struct net_device *dev)
 874 {
 875         struct fs_enet_private *fep = netdev_priv(dev);
 876
 877         return (*fep->ops->get_regs_len)(dev);
 878 }
 879
 880 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 881                          void *p)
 882 {
 883         struct fs_enet_private *fep = netdev_priv(dev);
 884         unsigned long flags;
 885         int r, len;
 886
 887         len = regs->len;
 888
 889         spin_lock_irqsave(&fep->lock, flags);
 890         r = (*fep->ops->get_regs)(dev, p, &len);
 891         spin_unlock_irqrestore(&fep->lock, flags);
 892
 893         if (r == 0)
 894                 regs->version = 0;
 895 }
 896
 897 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 898 {
 899         struct fs_enet_private *fep = netdev_priv(dev);
 900         return phy_ethtool_gset(fep->phydev, cmd);
 901 }
 902
 903 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 904 {
 905         struct fs_enet_private *fep = netdev_priv(dev);
 906         phy_ethtool_sset(fep->phydev, cmd);
 907         return 0;
 908 }
 909
 910 static int fs_nway_reset(struct net_device *dev)
 911 {
 912         return 0;
 913 }
 914
 915 static u32 fs_get_msglevel(struct net_device *dev)
 916 {
 917         struct fs_enet_private *fep = netdev_priv(dev);
 918         return fep->msg_enable;
 919 }
 920
 921 static void fs_set_msglevel(struct net_device *dev, u32 value)
 922 {
 923         struct fs_enet_private *fep = netdev_priv(dev);
 924         fep->msg_enable = value;
 925 }
 926
 927 static const struct ethtool_ops fs_ethtool_ops = {
 928         .get_drvinfo = fs_get_drvinfo,
 929         .get_regs_len = fs_get_regs_len,
 930         .get_settings = fs_get_settings,
 931         .set_settings = fs_set_settings,
 932         .nway_reset = fs_nway_reset,
 933         .get_link = ethtool_op_get_link,
 934         .get_msglevel = fs_get_msglevel,
 935         .set_msglevel = fs_set_msglevel,
 936         .set_tx_csum = ethtool_op_set_tx_csum,  /* local! */
 937         .set_sg = ethtool_op_set_sg,
 938         .get_regs = fs_get_regs,
 939 };
 940
 941 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 942 {
 943         struct fs_enet_private *fep = netdev_priv(dev);
 944         struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
 945         unsigned long flags;
 946         int rc;
 947
 948         if (!netif_running(dev))
 949                 return -EINVAL;
 950
 951         spin_lock_irqsave(&fep->lock, flags);
 952         rc = phy_mii_ioctl(fep->phydev, mii, cmd);
 953         spin_unlock_irqrestore(&fep->lock, flags);
 954         return rc;
 955 }
 956
 957 extern int fs_mii_connect(struct net_device *dev);
 958 extern void fs_mii_disconnect(struct net_device *dev);
 959
 960 #ifndef CONFIG_PPC_CPM_NEW_BINDING
 961 static struct net_device *fs_init_instance(struct device *dev,
 962                 struct fs_platform_info *fpi)
 963 {
 964         struct net_device *ndev = NULL;
 965         struct fs_enet_private *fep = NULL;
 966         int privsize, i, r, err = 0, registered = 0;
 967
 968         fpi->fs_no = fs_get_id(fpi);
 969         /* guard */
 970         if ((unsigned int)fpi->fs_no >= FS_MAX_INDEX)
 971                 return ERR_PTR(-EINVAL);
 972
 973         privsize = sizeof(*fep) + (sizeof(struct sk_buff **) *
 974                             (fpi->rx_ring + fpi->tx_ring));
 975
 976         ndev = alloc_etherdev(privsize);
 977         if (!ndev) {
 978                 err = -ENOMEM;
 979                 goto err;
 980         }
 981
 982         fep = netdev_priv(ndev);
 983
 984         fep->dev = dev;
 985         dev_set_drvdata(dev, ndev);
 986         fep->fpi = fpi;
 987         if (fpi->init_ioports)
 988                 fpi->init_ioports((struct fs_platform_info *)fpi);
 989
 990 #ifdef CONFIG_FS_ENET_HAS_FEC
 991         if (fs_get_fec_index(fpi->fs_no) >= 0)
 992                 fep->ops = &fs_fec_ops;
 993 #endif
 994
 995 #ifdef CONFIG_FS_ENET_HAS_SCC
 996         if (fs_get_scc_index(fpi->fs_no) >=0)
 997                 fep->ops = &fs_scc_ops;
 998 #endif
 999
1000 #ifdef CONFIG_FS_ENET_HAS_FCC
1001         if (fs_get_fcc_index(fpi->fs_no) >= 0)
1002                 fep->ops = &fs_fcc_ops;
1003 #endif
1004
1005         if (fep->ops == NULL) {
1006                 printk(KERN_ERR DRV_MODULE_NAME
1007                        ": %s No matching ops found (%d).\n",
1008                        ndev->name, fpi->fs_no);
1009                 err = -EINVAL;
1010                 goto err;
1011         }
1012
1013         r = (*fep->ops->setup_data)(ndev);
1014         if (r != 0) {
1015                 printk(KERN_ERR DRV_MODULE_NAME
1016                        ": %s setup_data failed\n",
1017                         ndev->name);
1018                 err = r;
1019                 goto err;
1020         }
1021
1022         /* point rx_skbuff, tx_skbuff */
1023         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1024         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1025
1026         /* init locks */
1027         spin_lock_init(&fep->lock);
1028         spin_lock_init(&fep->tx_lock);
1029
1030         /*
1031          * Set the Ethernet address.
1032          */
1033         for (i = 0; i < 6; i++)
1034                 ndev->dev_addr[i] = fpi->macaddr[i];
1035
1036         r = (*fep->ops->allocate_bd)(ndev);
1037
1038         if (fep->ring_base == NULL) {
1039                 printk(KERN_ERR DRV_MODULE_NAME
1040                        ": %s buffer descriptor alloc failed (%d).\n", ndev->name, r);
1041                 err = r;
1042                 goto err;
1043         }
1044
1045         /*
1046          * Set receive and transmit descriptor base.
1047          */
1048         fep->rx_bd_base = fep->ring_base;
1049         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1050
1051         /* initialize ring size variables */
1052         fep->tx_ring = fpi->tx_ring;
1053         fep->rx_ring = fpi->rx_ring;
1054
1055         /*
1056          * The FEC Ethernet specific entries in the device structure.
1057          */
1058         ndev->open = fs_enet_open;
1059         ndev->hard_start_xmit = fs_enet_start_xmit;
1060         ndev->tx_timeout = fs_timeout;
1061         ndev->watchdog_timeo = 2 * HZ;
1062         ndev->stop = fs_enet_close;
1063         ndev->get_stats = fs_enet_get_stats;
1064         ndev->set_multicast_list = fs_set_multicast_list;
1065
1066 #ifdef CONFIG_NET_POLL_CONTROLLER
1067         ndev->poll_controller = fs_enet_netpoll;
1068 #endif
1069
1070         netif_napi_add(ndev, &fep->napi,
1071                        fs_enet_rx_napi, fpi->napi_weight);
1072
1073         ndev->ethtool_ops = &fs_ethtool_ops;
1074         ndev->do_ioctl = fs_ioctl;
1075
1076         init_timer(&fep->phy_timer_list);
1077
1078         netif_carrier_off(ndev);
1079
1080         err = register_netdev(ndev);
1081         if (err != 0) {
1082                 printk(KERN_ERR DRV_MODULE_NAME
1083                        ": %s register_netdev failed.\n", ndev->name);
1084                 goto err;
1085         }
1086         registered = 1;
1087
1088
1089         return ndev;
1090
1091 err:
1092         if (ndev != NULL) {
1093                 if (registered)
1094                         unregister_netdev(ndev);
1095
1096                 if (fep != NULL) {
1097                         (*fep->ops->free_bd)(ndev);
1098                         (*fep->ops->cleanup_data)(ndev);
1099                 }
1100
1101                 free_netdev(ndev);
1102         }
1103
1104         dev_set_drvdata(dev, NULL);
1105
1106         return ERR_PTR(err);
1107 }
1108
1109 static int fs_cleanup_instance(struct net_device *ndev)
1110 {
1111         struct fs_enet_private *fep;
1112         const struct fs_platform_info *fpi;
1113         struct device *dev;
1114
1115         if (ndev == NULL)
1116                 return -EINVAL;
1117
1118         fep = netdev_priv(ndev);
1119         if (fep == NULL)
1120                 return -EINVAL;
1121
1122         fpi = fep->fpi;
1123
1124         unregister_netdev(ndev);
1125
1126         dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
1127                           (void __force *)fep->ring_base, fep->ring_mem_addr);
1128
1129         /* reset it */
1130         (*fep->ops->cleanup_data)(ndev);
1131
1132         dev = fep->dev;
1133         if (dev != NULL) {
1134                 dev_set_drvdata(dev, NULL);
1135                 fep->dev = NULL;
1136         }
1137
1138         free_netdev(ndev);
1139
1140         return 0;
1141 }
1142 #endif
1143
1144 /**************************************************************************************/
1145
1146 /* handy pointer to the immap */
1147 void __iomem *fs_enet_immap = NULL;
1148
1149 static int setup_immap(void)
1150 {
1151 #ifdef CONFIG_CPM1
1152         fs_enet_immap = ioremap(IMAP_ADDR, 0x4000);
1153         WARN_ON(!fs_enet_immap);
1154 #elif defined(CONFIG_CPM2)
1155         fs_enet_immap = cpm2_immr;
1156 #endif
1157
1158         return 0;
1159 }
1160
1161 static void cleanup_immap(void)
1162 {
1163 #if defined(CONFIG_CPM1)
1164         iounmap(fs_enet_immap);
1165 #endif
1166 }
1167
1168 /**************************************************************************************/
1169
1170 #ifdef CONFIG_PPC_CPM_NEW_BINDING
1171 static int __devinit find_phy(struct device_node *np,
1172                               struct fs_platform_info *fpi)
1173 {
1174         struct device_node *phynode, *mdionode;
1175         struct resource res;
1176         int ret = 0, len;
1177
1178         const u32 *data = of_get_property(np, "phy-handle", &len);
1179         if (!data || len != 4)
1180                 return -EINVAL;
1181
1182         phynode = of_find_node_by_phandle(*data);
1183         if (!phynode)
1184                 return -EINVAL;
1185
1186         mdionode = of_get_parent(phynode);
1187         if (!mdionode)
1188                 goto out_put_phy;
1189
1190         ret = of_address_to_resource(mdionode, 0, &res);
1191         if (ret)
1192                 goto out_put_mdio;
1193
1194         data = of_get_property(phynode, "reg", &len);
1195         if (!data || len != 4)
1196                 goto out_put_mdio;
1197
1198         snprintf(fpi->bus_id, 16, PHY_ID_FMT, res.start, *data);
1199
1200 out_put_mdio:
1201         of_node_put(mdionode);
1202 out_put_phy:
1203         of_node_put(phynode);
1204         return ret;
1205 }
1206
1207 #ifdef CONFIG_FS_ENET_HAS_FEC
1208 #define IS_FEC(match) ((match)->data == &fs_fec_ops)
1209 #else
1210 #define IS_FEC(match) 0
1211 #endif
1212
1213 static int __devinit fs_enet_probe(struct of_device *ofdev,
1214                                    const struct of_device_id *match)
1215 {
1216         struct net_device *ndev;
1217         struct fs_enet_private *fep;
1218         struct fs_platform_info *fpi;
1219         const u32 *data;
1220         const u8 *mac_addr;
1221         int privsize, len, ret = -ENODEV;
1222
1223         fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
1224         if (!fpi)
1225                 return -ENOMEM;
1226
1227         if (!IS_FEC(match)) {
1228                 data = of_get_property(ofdev->node, "fsl,cpm-command", &len);
1229                 if (!data || len != 4)
1230                         goto out_free_fpi;
1231
1232                 fpi->cp_command = *data;
1233         }
1234
1235         fpi->rx_ring = 32;
1236         fpi->tx_ring = 32;
1237         fpi->rx_copybreak = 240;
1238         fpi->use_napi = 1;
1239         fpi->napi_weight = 17;
1240
1241         ret = find_phy(ofdev->node, fpi);
1242         if (ret)
1243                 goto out_free_fpi;
1244
1245         privsize = sizeof(*fep) +
1246                    sizeof(struct sk_buff **) *
1247                    (fpi->rx_ring + fpi->tx_ring);
1248
1249         ndev = alloc_etherdev(privsize);
1250         if (!ndev) {
1251                 ret = -ENOMEM;
1252                 goto out_free_fpi;
1253         }
1254
1255         dev_set_drvdata(&ofdev->dev, ndev);
1256
1257         fep = netdev_priv(ndev);
1258         fep->dev = &ofdev->dev;
1259         fep->ndev = ndev;
1260         fep->fpi = fpi;
1261         fep->ops = match->data;
1262
1263         ret = fep->ops->setup_data(ndev);
1264         if (ret)
1265                 goto out_free_dev;
1266
1267         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1268         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1269
1270         spin_lock_init(&fep->lock);
1271         spin_lock_init(&fep->tx_lock);
1272
1273         mac_addr = of_get_mac_address(ofdev->node);
1274         if (mac_addr)
1275                 memcpy(ndev->dev_addr, mac_addr, 6);
1276
1277         ret = fep->ops->allocate_bd(ndev);
1278         if (ret)
1279                 goto out_cleanup_data;
1280
1281         fep->rx_bd_base = fep->ring_base;
1282         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1283
1284         fep->tx_ring = fpi->tx_ring;
1285         fep->rx_ring = fpi->rx_ring;
1286
1287         ndev->open = fs_enet_open;
1288         ndev->hard_start_xmit = fs_enet_start_xmit;
1289         ndev->tx_timeout = fs_timeout;
1290         ndev->watchdog_timeo = 2 * HZ;
1291         ndev->stop = fs_enet_close;
1292         ndev->get_stats = fs_enet_get_stats;
1293         ndev->set_multicast_list = fs_set_multicast_list;
1294
1295         if (fpi->use_napi)
1296                 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi,
1297                                fpi->napi_weight);
1298
1299         ndev->ethtool_ops = &fs_ethtool_ops;
1300         ndev->do_ioctl = fs_ioctl;
1301
1302         init_timer(&fep->phy_timer_list);
1303
1304         netif_carrier_off(ndev);
1305
1306         ret = register_netdev(ndev);
1307         if (ret)
1308                 goto out_free_bd;
1309
1310         printk(KERN_INFO "%s: fs_enet: %02x:%02x:%02x:%02x:%02x:%02x\n",
1311                ndev->name,
1312                ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
1313                ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
1314
1315         return 0;
1316
1317 out_free_bd:
1318         fep->ops->free_bd(ndev);
1319 out_cleanup_data:
1320         fep->ops->cleanup_data(ndev);
1321 out_free_dev:
1322         free_netdev(ndev);
1323         dev_set_drvdata(&ofdev->dev, NULL);
1324 out_free_fpi:
1325         kfree(fpi);
1326         return ret;
1327 }
1328
1329 static int fs_enet_remove(struct of_device *ofdev)
1330 {
1331         struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
1332         struct fs_enet_private *fep = netdev_priv(ndev);
1333
1334         unregister_netdev(ndev);
1335
1336         fep->ops->free_bd(ndev);
1337         fep->ops->cleanup_data(ndev);
1338         dev_set_drvdata(fep->dev, NULL);
1339
1340         free_netdev(ndev);
1341         return 0;
1342 }
1343
1344 static struct of_device_id fs_enet_match[] = {
1345 #ifdef CONFIG_FS_ENET_HAS_SCC
1346         {
1347                 .compatible = "fsl,cpm1-scc-enet",
1348                 .data = (void *)&fs_scc_ops,
1349         },
1350 #endif
1351 #ifdef CONFIG_FS_ENET_HAS_FCC
1352         {
1353                 .compatible = "fsl,cpm2-fcc-enet",
1354                 .data = (void *)&fs_fcc_ops,
1355         },
1356 #endif
1357 #ifdef CONFIG_FS_ENET_HAS_FEC
1358         {
1359                 .compatible = "fsl,pq1-fec-enet",
1360                 .data = (void *)&fs_fec_ops,
1361         },
1362 #endif
1363         {}
1364 };
1365
1366 static struct of_platform_driver fs_enet_driver = {
1367         .name   = "fs_enet",
1368         .match_table = fs_enet_match,
1369         .probe = fs_enet_probe,
1370         .remove = fs_enet_remove,
1371 };
1372
1373 static int __init fs_init(void)
1374 {
1375         int r = setup_immap();
1376         if (r != 0)
1377                 return r;
1378
1379         r = of_register_platform_driver(&fs_enet_driver);
1380         if (r != 0)
1381                 goto out;
1382
1383         return 0;
1384
1385 out:
1386         cleanup_immap();
1387         return r;
1388 }
1389
1390 static void __exit fs_cleanup(void)
1391 {
1392         of_unregister_platform_driver(&fs_enet_driver);
1393         cleanup_immap();
1394 }
1395 #else
1396 static int __devinit fs_enet_probe(struct device *dev)
1397 {
1398         struct net_device *ndev;
1399
1400         /* no fixup - no device */
1401         if (dev->platform_data == NULL) {
1402                 printk(KERN_INFO "fs_enet: "
1403                                 "probe called with no platform data; "
1404                                 "remove unused devices\n");
1405                 return -ENODEV;
1406         }
1407
1408         ndev = fs_init_instance(dev, dev->platform_data);
1409         if (IS_ERR(ndev))
1410                 return PTR_ERR(ndev);
1411         return 0;
1412 }
1413
1414 static int fs_enet_remove(struct device *dev)
1415 {
1416         return fs_cleanup_instance(dev_get_drvdata(dev));
1417 }
1418
1419 static struct device_driver fs_enet_fec_driver = {
1420         .name           = "fsl-cpm-fec",
1421         .bus            = &platform_bus_type,
1422         .probe          = fs_enet_probe,
1423         .remove         = fs_enet_remove,
1424 #ifdef CONFIG_PM
1425 /*      .suspend        = fs_enet_suspend,      TODO */
1426 /*      .resume         = fs_enet_resume,       TODO */
1427 #endif
1428 };
1429
1430 static struct device_driver fs_enet_scc_driver = {
1431         .name           = "fsl-cpm-scc",
1432         .bus            = &platform_bus_type,
1433         .probe          = fs_enet_probe,
1434         .remove         = fs_enet_remove,
1435 #ifdef CONFIG_PM
1436 /*      .suspend        = fs_enet_suspend,      TODO */
1437 /*      .resume         = fs_enet_resume,       TODO */
1438 #endif
1439 };
1440
1441 static struct device_driver fs_enet_fcc_driver = {
1442         .name           = "fsl-cpm-fcc",
1443         .bus            = &platform_bus_type,
1444         .probe          = fs_enet_probe,
1445         .remove         = fs_enet_remove,
1446 #ifdef CONFIG_PM
1447 /*      .suspend        = fs_enet_suspend,      TODO */
1448 /*      .resume         = fs_enet_resume,       TODO */
1449 #endif
1450 };
1451
1452 static int __init fs_init(void)
1453 {
1454         int r;
1455
1456         printk(KERN_INFO
1457                         "%s", version);
1458
1459         r = setup_immap();
1460         if (r != 0)
1461                 return r;
1462
1463 #ifdef CONFIG_FS_ENET_HAS_FCC
1464         /* let's insert mii stuff */
1465         r = fs_enet_mdio_bb_init();
1466
1467         if (r != 0) {
1468                 printk(KERN_ERR DRV_MODULE_NAME
1469                         "BB PHY init failed.\n");
1470                 return r;
1471         }
1472         r = driver_register(&fs_enet_fcc_driver);
1473         if (r != 0)
1474                 goto err;
1475 #endif
1476
1477 #ifdef CONFIG_FS_ENET_HAS_FEC
1478         r =  fs_enet_mdio_fec_init();
1479         if (r != 0) {
1480                 printk(KERN_ERR DRV_MODULE_NAME
1481                         "FEC PHY init failed.\n");
1482                 return r;
1483         }
1484
1485         r = driver_register(&fs_enet_fec_driver);
1486         if (r != 0)
1487                 goto err;
1488 #endif
1489
1490 #ifdef CONFIG_FS_ENET_HAS_SCC
1491         r = driver_register(&fs_enet_scc_driver);
1492         if (r != 0)
1493                 goto err;
1494 #endif
1495
1496         return 0;
1497 err:
1498         cleanup_immap();
1499         return r;
1500 }
1501
1502 static void __exit fs_cleanup(void)
1503 {
1504         driver_unregister(&fs_enet_fec_driver);
1505         driver_unregister(&fs_enet_fcc_driver);
1506         driver_unregister(&fs_enet_scc_driver);
1507         cleanup_immap();
1508 }
1509 #endif
1510
1511 #ifdef CONFIG_NET_POLL_CONTROLLER
1512 static void fs_enet_netpoll(struct net_device *dev)
1513 {
1514        disable_irq(dev->irq);
1515        fs_enet_interrupt(dev->irq, dev, NULL);
1516        enable_irq(dev->irq);
1517 }
1518 #endif
1519
1520 /**************************************************************************************/
1521
1522 module_init(fs_init);
1523 module_exit(fs_cleanup);