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         /*
 100          * First, grab all of the stats for the incoming packet.
 101          * These get messed up if we get called due to a busy condition.
 102          */
 103         bdp = fep->cur_rx;
 104
 105         /* clear RX status bits for napi*/
 106         (*fep->ops->napi_clear_rx_event)(dev);
 107
 108         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
 109                 curidx = bdp - fep->rx_bd_base;
 110
 111                 /*
 112                  * Since we have allocated space to hold a complete frame,
 113                  * the last indicator should be set.
 114                  */
 115                 if ((sc & BD_ENET_RX_LAST) == 0)
 116                         printk(KERN_WARNING DRV_MODULE_NAME
 117                                ": %s rcv is not +last\n",
 118                                dev->name);
 119
 120                 /*
 121                  * Check for errors.
 122                  */
 123                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 124                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 125                         fep->stats.rx_errors++;
 126                         /* Frame too long or too short. */
 127                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 128                                 fep->stats.rx_length_errors++;
 129                         /* Frame alignment */
 130                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 131                                 fep->stats.rx_frame_errors++;
 132                         /* CRC Error */
 133                         if (sc & BD_ENET_RX_CR)
 134                                 fep->stats.rx_crc_errors++;
 135                         /* FIFO overrun */
 136                         if (sc & BD_ENET_RX_OV)
 137                                 fep->stats.rx_crc_errors++;
 138
 139                         skb = fep->rx_skbuff[curidx];
 140
 141                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 142                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 143                                 DMA_FROM_DEVICE);
 144
 145                         skbn = skb;
 146
 147                 } else {
 148                         skb = fep->rx_skbuff[curidx];
 149
 150                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 151                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 152                                 DMA_FROM_DEVICE);
 153
 154                         /*
 155                          * Process the incoming frame.
 156                          */
 157                         fep->stats.rx_packets++;
 158                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 159                         fep->stats.rx_bytes += pkt_len + 4;
 160
 161                         if (pkt_len <= fpi->rx_copybreak) {
 162                                 /* +2 to make IP header L1 cache aligned */
 163                                 skbn = dev_alloc_skb(pkt_len + 2);
 164                                 if (skbn != NULL) {
 165                                         skb_reserve(skbn, 2);   /* align IP header */
 166                                         skb_copy_from_linear_data(skb,
 167                                                       skbn->data, pkt_len);
 168                                         /* swap */
 169                                         skbt = skb;
 170                                         skb = skbn;
 171                                         skbn = skbt;
 172                                 }
 173                         } else {
 174                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 175
 176                                 if (skbn)
 177                                         skb_align(skbn, ENET_RX_ALIGN);
 178                         }
 179
 180                         if (skbn != NULL) {
 181                                 skb_put(skb, pkt_len);  /* Make room */
 182                                 skb->protocol = eth_type_trans(skb, dev);
 183                                 received++;
 184                                 netif_receive_skb(skb);
 185                         } else {
 186                                 printk(KERN_WARNING DRV_MODULE_NAME
 187                                        ": %s Memory squeeze, dropping packet.\n",
 188                                        dev->name);
 189                                 fep->stats.rx_dropped++;
 190                                 skbn = skb;
 191                         }
 192                 }
 193
 194                 fep->rx_skbuff[curidx] = skbn;
 195                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 196                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 197                              DMA_FROM_DEVICE));
 198                 CBDW_DATLEN(bdp, 0);
 199                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 200
 201                 /*
 202                  * Update BD pointer to next entry.
 203                  */
 204                 if ((sc & BD_ENET_RX_WRAP) == 0)
 205                         bdp++;
 206                 else
 207                         bdp = fep->rx_bd_base;
 208
 209                 (*fep->ops->rx_bd_done)(dev);
 210
 211                 if (received >= budget)
 212                         break;
 213         }
 214
 215         fep->cur_rx = bdp;
 216
 217         if (received < budget) {
 218                 /* done */
 219                 netif_rx_complete(dev, napi);
 220                 (*fep->ops->napi_enable_rx)(dev);
 221         }
 222         return received;
 223 }
 224
 225 /* non NAPI receive function */
 226 static int fs_enet_rx_non_napi(struct net_device *dev)
 227 {
 228         struct fs_enet_private *fep = netdev_priv(dev);
 229         const struct fs_platform_info *fpi = fep->fpi;
 230         cbd_t __iomem *bdp;
 231         struct sk_buff *skb, *skbn, *skbt;
 232         int received = 0;
 233         u16 pkt_len, sc;
 234         int curidx;
 235         /*
 236          * First, grab all of the stats for the incoming packet.
 237          * These get messed up if we get called due to a busy condition.
 238          */
 239         bdp = fep->cur_rx;
 240
 241         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
 242
 243                 curidx = bdp - fep->rx_bd_base;
 244
 245                 /*
 246                  * Since we have allocated space to hold a complete frame,
 247                  * the last indicator should be set.
 248                  */
 249                 if ((sc & BD_ENET_RX_LAST) == 0)
 250                         printk(KERN_WARNING DRV_MODULE_NAME
 251                                ": %s rcv is not +last\n",
 252                                dev->name);
 253
 254                 /*
 255                  * Check for errors.
 256                  */
 257                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 258                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 259                         fep->stats.rx_errors++;
 260                         /* Frame too long or too short. */
 261                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 262                                 fep->stats.rx_length_errors++;
 263                         /* Frame alignment */
 264                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 265                                 fep->stats.rx_frame_errors++;
 266                         /* CRC Error */
 267                         if (sc & BD_ENET_RX_CR)
 268                                 fep->stats.rx_crc_errors++;
 269                         /* FIFO overrun */
 270                         if (sc & BD_ENET_RX_OV)
 271                                 fep->stats.rx_crc_errors++;
 272
 273                         skb = fep->rx_skbuff[curidx];
 274
 275                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 276                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 277                                 DMA_FROM_DEVICE);
 278
 279                         skbn = skb;
 280
 281                 } else {
 282
 283                         skb = fep->rx_skbuff[curidx];
 284
 285                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 286                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 287                                 DMA_FROM_DEVICE);
 288
 289                         /*
 290                          * Process the incoming frame.
 291                          */
 292                         fep->stats.rx_packets++;
 293                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 294                         fep->stats.rx_bytes += pkt_len + 4;
 295
 296                         if (pkt_len <= fpi->rx_copybreak) {
 297                                 /* +2 to make IP header L1 cache aligned */
 298                                 skbn = dev_alloc_skb(pkt_len + 2);
 299                                 if (skbn != NULL) {
 300                                         skb_reserve(skbn, 2);   /* align IP header */
 301                                         skb_copy_from_linear_data(skb,
 302                                                       skbn->data, pkt_len);
 303                                         /* swap */
 304                                         skbt = skb;
 305                                         skb = skbn;
 306                                         skbn = skbt;
 307                                 }
 308                         } else {
 309                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 310
 311                                 if (skbn)
 312                                         skb_align(skbn, ENET_RX_ALIGN);
 313                         }
 314
 315                         if (skbn != NULL) {
 316                                 skb_put(skb, pkt_len);  /* Make room */
 317                                 skb->protocol = eth_type_trans(skb, dev);
 318                                 received++;
 319                                 netif_rx(skb);
 320                         } else {
 321                                 printk(KERN_WARNING DRV_MODULE_NAME
 322                                        ": %s Memory squeeze, dropping packet.\n",
 323                                        dev->name);
 324                                 fep->stats.rx_dropped++;
 325                                 skbn = skb;
 326                         }
 327                 }
 328
 329                 fep->rx_skbuff[curidx] = skbn;
 330                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 331                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 332                              DMA_FROM_DEVICE));
 333                 CBDW_DATLEN(bdp, 0);
 334                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 335
 336                 /*
 337                  * Update BD pointer to next entry.
 338                  */
 339                 if ((sc & BD_ENET_RX_WRAP) == 0)
 340                         bdp++;
 341                 else
 342                         bdp = fep->rx_bd_base;
 343
 344                 (*fep->ops->rx_bd_done)(dev);
 345         }
 346
 347         fep->cur_rx = bdp;
 348
 349         return 0;
 350 }
 351
 352 static void fs_enet_tx(struct net_device *dev)
 353 {
 354         struct fs_enet_private *fep = netdev_priv(dev);
 355         cbd_t __iomem *bdp;
 356         struct sk_buff *skb;
 357         int dirtyidx, do_wake, do_restart;
 358         u16 sc;
 359
 360         spin_lock(&fep->tx_lock);
 361         bdp = fep->dirty_tx;
 362
 363         do_wake = do_restart = 0;
 364         while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
 365                 dirtyidx = bdp - fep->tx_bd_base;
 366
 367                 if (fep->tx_free == fep->tx_ring)
 368                         break;
 369
 370                 skb = fep->tx_skbuff[dirtyidx];
 371
 372                 /*
 373                  * Check for errors.
 374                  */
 375                 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
 376                           BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
 377
 378                         if (sc & BD_ENET_TX_HB) /* No heartbeat */
 379                                 fep->stats.tx_heartbeat_errors++;
 380                         if (sc & BD_ENET_TX_LC) /* Late collision */
 381                                 fep->stats.tx_window_errors++;
 382                         if (sc & BD_ENET_TX_RL) /* Retrans limit */
 383                                 fep->stats.tx_aborted_errors++;
 384                         if (sc & BD_ENET_TX_UN) /* Underrun */
 385                                 fep->stats.tx_fifo_errors++;
 386                         if (sc & BD_ENET_TX_CSL)        /* Carrier lost */
 387                                 fep->stats.tx_carrier_errors++;
 388
 389                         if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
 390                                 fep->stats.tx_errors++;
 391                                 do_restart = 1;
 392                         }
 393                 } else
 394                         fep->stats.tx_packets++;
 395
 396                 if (sc & BD_ENET_TX_READY)
 397                         printk(KERN_WARNING DRV_MODULE_NAME
 398                                ": %s HEY! Enet xmit interrupt and TX_READY.\n",
 399                                dev->name);
 400
 401                 /*
 402                  * Deferred means some collisions occurred during transmit,
 403                  * but we eventually sent the packet OK.
 404                  */
 405                 if (sc & BD_ENET_TX_DEF)
 406                         fep->stats.collisions++;
 407
 408                 /* unmap */
 409                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 410                                 skb->len, DMA_TO_DEVICE);
 411
 412                 /*
 413                  * Free the sk buffer associated with this last transmit.
 414                  */
 415                 dev_kfree_skb_irq(skb);
 416                 fep->tx_skbuff[dirtyidx] = NULL;
 417
 418                 /*
 419                  * Update pointer to next buffer descriptor to be transmitted.
 420                  */
 421                 if ((sc & BD_ENET_TX_WRAP) == 0)
 422                         bdp++;
 423                 else
 424                         bdp = fep->tx_bd_base;
 425
 426                 /*
 427                  * Since we have freed up a buffer, the ring is no longer
 428                  * full.
 429                  */
 430                 if (!fep->tx_free++)
 431                         do_wake = 1;
 432         }
 433
 434         fep->dirty_tx = bdp;
 435
 436         if (do_restart)
 437                 (*fep->ops->tx_restart)(dev);
 438
 439         spin_unlock(&fep->tx_lock);
 440
 441         if (do_wake)
 442                 netif_wake_queue(dev);
 443 }
 444
 445 /*
 446  * The interrupt handler.
 447  * This is called from the MPC core interrupt.
 448  */
 449 static irqreturn_t
 450 fs_enet_interrupt(int irq, void *dev_id)
 451 {
 452         struct net_device *dev = dev_id;
 453         struct fs_enet_private *fep;
 454         const struct fs_platform_info *fpi;
 455         u32 int_events;
 456         u32 int_clr_events;
 457         int nr, napi_ok;
 458         int handled;
 459
 460         fep = netdev_priv(dev);
 461         fpi = fep->fpi;
 462
 463         nr = 0;
 464         while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
 465                 nr++;
 466
 467                 int_clr_events = int_events;
 468                 if (fpi->use_napi)
 469                         int_clr_events &= ~fep->ev_napi_rx;
 470
 471                 (*fep->ops->clear_int_events)(dev, int_clr_events);
 472
 473                 if (int_events & fep->ev_err)
 474                         (*fep->ops->ev_error)(dev, int_events);
 475
 476                 if (int_events & fep->ev_rx) {
 477                         if (!fpi->use_napi)
 478                                 fs_enet_rx_non_napi(dev);
 479                         else {
 480                                 napi_ok = napi_schedule_prep(&fep->napi);
 481
 482                                 (*fep->ops->napi_disable_rx)(dev);
 483                                 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
 484
 485                                 /* NOTE: it is possible for FCCs in NAPI mode    */
 486                                 /* to submit a spurious interrupt while in poll  */
 487                                 if (napi_ok)
 488                                         __netif_rx_schedule(dev, &fep->napi);
 489                         }
 490                 }
 491
 492                 if (int_events & fep->ev_tx)
 493                         fs_enet_tx(dev);
 494         }
 495
 496         handled = nr > 0;
 497         return IRQ_RETVAL(handled);
 498 }
 499
 500 void fs_init_bds(struct net_device *dev)
 501 {
 502         struct fs_enet_private *fep = netdev_priv(dev);
 503         cbd_t __iomem *bdp;
 504         struct sk_buff *skb;
 505         int i;
 506
 507         fs_cleanup_bds(dev);
 508
 509         fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
 510         fep->tx_free = fep->tx_ring;
 511         fep->cur_rx = fep->rx_bd_base;
 512
 513         /*
 514          * Initialize the receive buffer descriptors.
 515          */
 516         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 517                 skb = dev_alloc_skb(ENET_RX_FRSIZE);
 518                 if (skb == NULL) {
 519                         printk(KERN_WARNING DRV_MODULE_NAME
 520                                ": %s Memory squeeze, unable to allocate skb\n",
 521                                dev->name);
 522                         break;
 523                 }
 524                 skb_align(skb, ENET_RX_ALIGN);
 525                 fep->rx_skbuff[i] = skb;
 526                 CBDW_BUFADDR(bdp,
 527                         dma_map_single(fep->dev, skb->data,
 528                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 529                                 DMA_FROM_DEVICE));
 530                 CBDW_DATLEN(bdp, 0);    /* zero */
 531                 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
 532                         ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
 533         }
 534         /*
 535          * if we failed, fillup remainder
 536          */
 537         for (; i < fep->rx_ring; i++, bdp++) {
 538                 fep->rx_skbuff[i] = NULL;
 539                 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
 540         }
 541
 542         /*
 543          * ...and the same for transmit.
 544          */
 545         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 546                 fep->tx_skbuff[i] = NULL;
 547                 CBDW_BUFADDR(bdp, 0);
 548                 CBDW_DATLEN(bdp, 0);
 549                 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
 550         }
 551 }
 552
 553 void fs_cleanup_bds(struct net_device *dev)
 554 {
 555         struct fs_enet_private *fep = netdev_priv(dev);
 556         struct sk_buff *skb;
 557         cbd_t __iomem *bdp;
 558         int i;
 559
 560         /*
 561          * Reset SKB transmit buffers.
 562          */
 563         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 564                 if ((skb = fep->tx_skbuff[i]) == NULL)
 565                         continue;
 566
 567                 /* unmap */
 568                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 569                                 skb->len, DMA_TO_DEVICE);
 570
 571                 fep->tx_skbuff[i] = NULL;
 572                 dev_kfree_skb(skb);
 573         }
 574
 575         /*
 576          * Reset SKB receive buffers
 577          */
 578         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 579                 if ((skb = fep->rx_skbuff[i]) == NULL)
 580                         continue;
 581
 582                 /* unmap */
 583                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 584                         L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 585                         DMA_FROM_DEVICE);
 586
 587                 fep->rx_skbuff[i] = NULL;
 588
 589                 dev_kfree_skb(skb);
 590         }
 591 }
 592
 593 /**********************************************************************************/
 594
 595 static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 596 {
 597         struct fs_enet_private *fep = netdev_priv(dev);
 598         cbd_t __iomem *bdp;
 599         int curidx;
 600         u16 sc;
 601         unsigned long flags;
 602
 603         spin_lock_irqsave(&fep->tx_lock, flags);
 604
 605         /*
 606          * Fill in a Tx ring entry
 607          */
 608         bdp = fep->cur_tx;
 609
 610         if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
 611                 netif_stop_queue(dev);
 612                 spin_unlock_irqrestore(&fep->tx_lock, flags);
 613
 614                 /*
 615                  * Ooops.  All transmit buffers are full.  Bail out.
 616                  * This should not happen, since the tx queue should be stopped.
 617                  */
 618                 printk(KERN_WARNING DRV_MODULE_NAME
 619                        ": %s tx queue full!.\n", dev->name);
 620                 return NETDEV_TX_BUSY;
 621         }
 622
 623         curidx = bdp - fep->tx_bd_base;
 624         /*
 625          * Clear all of the status flags.
 626          */
 627         CBDC_SC(bdp, BD_ENET_TX_STATS);
 628
 629         /*
 630          * Save skb pointer.
 631          */
 632         fep->tx_skbuff[curidx] = skb;
 633
 634         fep->stats.tx_bytes += skb->len;
 635
 636         /*
 637          * Push the data cache so the CPM does not get stale memory data.
 638          */
 639         CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
 640                                 skb->data, skb->len, DMA_TO_DEVICE));
 641         CBDW_DATLEN(bdp, skb->len);
 642
 643         dev->trans_start = jiffies;
 644
 645         /*
 646          * If this was the last BD in the ring, start at the beginning again.
 647          */
 648         if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
 649                 fep->cur_tx++;
 650         else
 651                 fep->cur_tx = fep->tx_bd_base;
 652
 653         if (!--fep->tx_free)
 654                 netif_stop_queue(dev);
 655
 656         /* Trigger transmission start */
 657         sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
 658              BD_ENET_TX_LAST | BD_ENET_TX_TC;
 659
 660         /* note that while FEC does not have this bit
 661          * it marks it as available for software use
 662          * yay for hw reuse :) */
 663         if (skb->len <= 60)
 664                 sc |= BD_ENET_TX_PAD;
 665         CBDS_SC(bdp, sc);
 666
 667         (*fep->ops->tx_kickstart)(dev);
 668
 669         spin_unlock_irqrestore(&fep->tx_lock, flags);
 670
 671         return NETDEV_TX_OK;
 672 }
 673
 674 static int fs_request_irq(struct net_device *dev, int irq, const char *name,
 675                 irq_handler_t irqf)
 676 {
 677         struct fs_enet_private *fep = netdev_priv(dev);
 678
 679         (*fep->ops->pre_request_irq)(dev, irq);
 680         return request_irq(irq, irqf, IRQF_SHARED, name, dev);
 681 }
 682
 683 static void fs_free_irq(struct net_device *dev, int irq)
 684 {
 685         struct fs_enet_private *fep = netdev_priv(dev);
 686
 687         free_irq(irq, dev);
 688         (*fep->ops->post_free_irq)(dev, irq);
 689 }
 690
 691 static void fs_timeout(struct net_device *dev)
 692 {
 693         struct fs_enet_private *fep = netdev_priv(dev);
 694         unsigned long flags;
 695         int wake = 0;
 696
 697         fep->stats.tx_errors++;
 698
 699         spin_lock_irqsave(&fep->lock, flags);
 700
 701         if (dev->flags & IFF_UP) {
 702                 phy_stop(fep->phydev);
 703                 (*fep->ops->stop)(dev);
 704                 (*fep->ops->restart)(dev);
 705                 phy_start(fep->phydev);
 706         }
 707
 708         phy_start(fep->phydev);
 709         wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
 710         spin_unlock_irqrestore(&fep->lock, flags);
 711
 712         if (wake)
 713                 netif_wake_queue(dev);
 714 }
 715
 716 /*-----------------------------------------------------------------------------
 717  *  generic link-change handler - should be sufficient for most cases
 718  *-----------------------------------------------------------------------------*/
 719 static void generic_adjust_link(struct  net_device *dev)
 720 {
 721         struct fs_enet_private *fep = netdev_priv(dev);
 722         struct phy_device *phydev = fep->phydev;
 723         int new_state = 0;
 724
 725         if (phydev->link) {
 726                 /* adjust to duplex mode */
 727                 if (phydev->duplex != fep->oldduplex) {
 728                         new_state = 1;
 729                         fep->oldduplex = phydev->duplex;
 730                 }
 731
 732                 if (phydev->speed != fep->oldspeed) {
 733                         new_state = 1;
 734                         fep->oldspeed = phydev->speed;
 735                 }
 736
 737                 if (!fep->oldlink) {
 738                         new_state = 1;
 739                         fep->oldlink = 1;
 740                         netif_schedule(dev);
 741                         netif_carrier_on(dev);
 742                         netif_start_queue(dev);
 743                 }
 744
 745                 if (new_state)
 746                         fep->ops->restart(dev);
 747         } else if (fep->oldlink) {
 748                 new_state = 1;
 749                 fep->oldlink = 0;
 750                 fep->oldspeed = 0;
 751                 fep->oldduplex = -1;
 752                 netif_carrier_off(dev);
 753                 netif_stop_queue(dev);
 754         }
 755
 756         if (new_state && netif_msg_link(fep))
 757                 phy_print_status(phydev);
 758 }
 759
 760
 761 static void fs_adjust_link(struct net_device *dev)
 762 {
 763         struct fs_enet_private *fep = netdev_priv(dev);
 764         unsigned long flags;
 765
 766         spin_lock_irqsave(&fep->lock, flags);
 767
 768         if(fep->ops->adjust_link)
 769                 fep->ops->adjust_link(dev);
 770         else
 771                 generic_adjust_link(dev);
 772
 773         spin_unlock_irqrestore(&fep->lock, flags);
 774 }
 775
 776 static int fs_init_phy(struct net_device *dev)
 777 {
 778         struct fs_enet_private *fep = netdev_priv(dev);
 779         struct phy_device *phydev;
 780
 781         fep->oldlink = 0;
 782         fep->oldspeed = 0;
 783         fep->oldduplex = -1;
 784         if(fep->fpi->bus_id)
 785                 phydev = phy_connect(dev, fep->fpi->bus_id, &fs_adjust_link, 0,
 786                                 PHY_INTERFACE_MODE_MII);
 787         else {
 788                 printk("No phy bus ID specified in BSP code\n");
 789                 return -EINVAL;
 790         }
 791         if (IS_ERR(phydev)) {
 792                 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
 793                 return PTR_ERR(phydev);
 794         }
 795
 796         fep->phydev = phydev;
 797
 798         return 0;
 799 }
 800
 801 static int fs_enet_open(struct net_device *dev)
 802 {
 803         struct fs_enet_private *fep = netdev_priv(dev);
 804         int r;
 805         int err;
 806
 807         if (fep->fpi->use_napi)
 808                 napi_enable(&fep->napi);
 809
 810         /* Install our interrupt handler. */
 811         r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
 812         if (r != 0) {
 813                 printk(KERN_ERR DRV_MODULE_NAME
 814                        ": %s Could not allocate FS_ENET IRQ!", dev->name);
 815                 if (fep->fpi->use_napi)
 816                         napi_disable(&fep->napi);
 817                 return -EINVAL;
 818         }
 819
 820         err = fs_init_phy(dev);
 821         if (err) {
 822                 if (fep->fpi->use_napi)
 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 = 1;
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         dev_set_drvdata(&ofdev->dev, ndev);
1253
1254         fep = netdev_priv(ndev);
1255         fep->dev = &ofdev->dev;
1256         fep->ndev = ndev;
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
1292         if (fpi->use_napi)
1293                 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi,
1294                                fpi->napi_weight);
1295
1296         ndev->ethtool_ops = &fs_ethtool_ops;
1297         ndev->do_ioctl = fs_ioctl;
1298
1299         init_timer(&fep->phy_timer_list);
1300
1301         netif_carrier_off(ndev);
1302
1303         ret = register_netdev(ndev);
1304         if (ret)
1305                 goto out_free_bd;
1306
1307         printk(KERN_INFO "%s: fs_enet: %02x:%02x:%02x:%02x:%02x:%02x\n",
1308                ndev->name,
1309                ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
1310                ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
1311
1312         return 0;
1313
1314 out_free_bd:
1315         fep->ops->free_bd(ndev);
1316 out_cleanup_data:
1317         fep->ops->cleanup_data(ndev);
1318 out_free_dev:
1319         free_netdev(ndev);
1320         dev_set_drvdata(&ofdev->dev, NULL);
1321 out_free_fpi:
1322         kfree(fpi);
1323         return ret;
1324 }
1325
1326 static int fs_enet_remove(struct of_device *ofdev)
1327 {
1328         struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
1329         struct fs_enet_private *fep = netdev_priv(ndev);
1330
1331         unregister_netdev(ndev);
1332
1333         fep->ops->free_bd(ndev);
1334         fep->ops->cleanup_data(ndev);
1335         dev_set_drvdata(fep->dev, NULL);
1336
1337         free_netdev(ndev);
1338         return 0;
1339 }
1340
1341 static struct of_device_id fs_enet_match[] = {
1342 #ifdef CONFIG_FS_ENET_HAS_SCC
1343         {
1344                 .compatible = "fsl,cpm1-scc-enet",
1345                 .data = (void *)&fs_scc_ops,
1346         },
1347 #endif
1348 #ifdef CONFIG_FS_ENET_HAS_FCC
1349         {
1350                 .compatible = "fsl,cpm2-fcc-enet",
1351                 .data = (void *)&fs_fcc_ops,
1352         },
1353 #endif
1354 #ifdef CONFIG_FS_ENET_HAS_FEC
1355         {
1356                 .compatible = "fsl,pq1-fec-enet",
1357                 .data = (void *)&fs_fec_ops,
1358         },
1359 #endif
1360         {}
1361 };
1362
1363 static struct of_platform_driver fs_enet_driver = {
1364         .name   = "fs_enet",
1365         .match_table = fs_enet_match,
1366         .probe = fs_enet_probe,
1367         .remove = fs_enet_remove,
1368 };
1369
1370 static int __init fs_init(void)
1371 {
1372         int r = setup_immap();
1373         if (r != 0)
1374                 return r;
1375
1376         r = of_register_platform_driver(&fs_enet_driver);
1377         if (r != 0)
1378                 goto out;
1379
1380         return 0;
1381
1382 out:
1383         cleanup_immap();
1384         return r;
1385 }
1386
1387 static void __exit fs_cleanup(void)
1388 {
1389         of_unregister_platform_driver(&fs_enet_driver);
1390         cleanup_immap();
1391 }
1392 #else
1393 static int __devinit fs_enet_probe(struct device *dev)
1394 {
1395         struct net_device *ndev;
1396
1397         /* no fixup - no device */
1398         if (dev->platform_data == NULL) {
1399                 printk(KERN_INFO "fs_enet: "
1400                                 "probe called with no platform data; "
1401                                 "remove unused devices\n");
1402                 return -ENODEV;
1403         }
1404
1405         ndev = fs_init_instance(dev, dev->platform_data);
1406         if (IS_ERR(ndev))
1407                 return PTR_ERR(ndev);
1408         return 0;
1409 }
1410
1411 static int fs_enet_remove(struct device *dev)
1412 {
1413         return fs_cleanup_instance(dev_get_drvdata(dev));
1414 }
1415
1416 static struct device_driver fs_enet_fec_driver = {
1417         .name           = "fsl-cpm-fec",
1418         .bus            = &platform_bus_type,
1419         .probe          = fs_enet_probe,
1420         .remove         = fs_enet_remove,
1421 #ifdef CONFIG_PM
1422 /*      .suspend        = fs_enet_suspend,      TODO */
1423 /*      .resume         = fs_enet_resume,       TODO */
1424 #endif
1425 };
1426
1427 static struct device_driver fs_enet_scc_driver = {
1428         .name           = "fsl-cpm-scc",
1429         .bus            = &platform_bus_type,
1430         .probe          = fs_enet_probe,
1431         .remove         = fs_enet_remove,
1432 #ifdef CONFIG_PM
1433 /*      .suspend        = fs_enet_suspend,      TODO */
1434 /*      .resume         = fs_enet_resume,       TODO */
1435 #endif
1436 };
1437
1438 static struct device_driver fs_enet_fcc_driver = {
1439         .name           = "fsl-cpm-fcc",
1440         .bus            = &platform_bus_type,
1441         .probe          = fs_enet_probe,
1442         .remove         = fs_enet_remove,
1443 #ifdef CONFIG_PM
1444 /*      .suspend        = fs_enet_suspend,      TODO */
1445 /*      .resume         = fs_enet_resume,       TODO */
1446 #endif
1447 };
1448
1449 static int __init fs_init(void)
1450 {
1451         int r;
1452
1453         printk(KERN_INFO
1454                         "%s", version);
1455
1456         r = setup_immap();
1457         if (r != 0)
1458                 return r;
1459
1460 #ifdef CONFIG_FS_ENET_HAS_FCC
1461         /* let's insert mii stuff */
1462         r = fs_enet_mdio_bb_init();
1463
1464         if (r != 0) {
1465                 printk(KERN_ERR DRV_MODULE_NAME
1466                         "BB PHY init failed.\n");
1467                 return r;
1468         }
1469         r = driver_register(&fs_enet_fcc_driver);
1470         if (r != 0)
1471                 goto err;
1472 #endif
1473
1474 #ifdef CONFIG_FS_ENET_HAS_FEC
1475         r =  fs_enet_mdio_fec_init();
1476         if (r != 0) {
1477                 printk(KERN_ERR DRV_MODULE_NAME
1478                         "FEC PHY init failed.\n");
1479                 return r;
1480         }
1481
1482         r = driver_register(&fs_enet_fec_driver);
1483         if (r != 0)
1484                 goto err;
1485 #endif
1486
1487 #ifdef CONFIG_FS_ENET_HAS_SCC
1488         r = driver_register(&fs_enet_scc_driver);
1489         if (r != 0)
1490                 goto err;
1491 #endif
1492
1493         return 0;
1494 err:
1495         cleanup_immap();
1496         return r;
1497 }
1498
1499 static void __exit fs_cleanup(void)
1500 {
1501         driver_unregister(&fs_enet_fec_driver);
1502         driver_unregister(&fs_enet_fcc_driver);
1503         driver_unregister(&fs_enet_scc_driver);
1504         cleanup_immap();
1505 }
1506 #endif
1507
1508 #ifdef CONFIG_NET_POLL_CONTROLLER
1509 static void fs_enet_netpoll(struct net_device *dev)
1510 {
1511        disable_irq(dev->irq);
1512        fs_enet_interrupt(dev->irq, dev, NULL);
1513        enable_irq(dev->irq);
1514 }
1515 #endif
1516
1517 /**************************************************************************************/
1518
1519 module_init(fs_init);
1520 module_exit(fs_cleanup);