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         if (fep->fpi->use_napi)
 839                 napi_disable(&fep->napi);
 840         phy_stop(fep->phydev);
 841
 842         spin_lock_irqsave(&fep->lock, flags);
 843         spin_lock(&fep->tx_lock);
 844         (*fep->ops->stop)(dev);
 845         spin_unlock(&fep->tx_lock);
 846         spin_unlock_irqrestore(&fep->lock, flags);
 847
 848         /* release any irqs */
 849         phy_disconnect(fep->phydev);
 850         fep->phydev = NULL;
 851         fs_free_irq(dev, fep->interrupt);
 852
 853         return 0;
 854 }
 855
 856 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
 857 {
 858         struct fs_enet_private *fep = netdev_priv(dev);
 859         return &fep->stats;
 860 }
 861
 862 /*************************************************************************/
 863
 864 static void fs_get_drvinfo(struct net_device *dev,
 865                             struct ethtool_drvinfo *info)
 866 {
 867         strcpy(info->driver, DRV_MODULE_NAME);
 868         strcpy(info->version, DRV_MODULE_VERSION);
 869 }
 870
 871 static int fs_get_regs_len(struct net_device *dev)
 872 {
 873         struct fs_enet_private *fep = netdev_priv(dev);
 874
 875         return (*fep->ops->get_regs_len)(dev);
 876 }
 877
 878 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 879                          void *p)
 880 {
 881         struct fs_enet_private *fep = netdev_priv(dev);
 882         unsigned long flags;
 883         int r, len;
 884
 885         len = regs->len;
 886
 887         spin_lock_irqsave(&fep->lock, flags);
 888         r = (*fep->ops->get_regs)(dev, p, &len);
 889         spin_unlock_irqrestore(&fep->lock, flags);
 890
 891         if (r == 0)
 892                 regs->version = 0;
 893 }
 894
 895 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 896 {
 897         struct fs_enet_private *fep = netdev_priv(dev);
 898
 899         if (!fep->phydev)
 900                 return -ENODEV;
 901
 902         return phy_ethtool_gset(fep->phydev, cmd);
 903 }
 904
 905 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 906 {
 907         struct fs_enet_private *fep = netdev_priv(dev);
 908
 909         if (!fep->phydev)
 910                 return -ENODEV;
 911
 912         return phy_ethtool_sset(fep->phydev, cmd);
 913 }
 914
 915 static int fs_nway_reset(struct net_device *dev)
 916 {
 917         return 0;
 918 }
 919
 920 static u32 fs_get_msglevel(struct net_device *dev)
 921 {
 922         struct fs_enet_private *fep = netdev_priv(dev);
 923         return fep->msg_enable;
 924 }
 925
 926 static void fs_set_msglevel(struct net_device *dev, u32 value)
 927 {
 928         struct fs_enet_private *fep = netdev_priv(dev);
 929         fep->msg_enable = value;
 930 }
 931
 932 static const struct ethtool_ops fs_ethtool_ops = {
 933         .get_drvinfo = fs_get_drvinfo,
 934         .get_regs_len = fs_get_regs_len,
 935         .get_settings = fs_get_settings,
 936         .set_settings = fs_set_settings,
 937         .nway_reset = fs_nway_reset,
 938         .get_link = ethtool_op_get_link,
 939         .get_msglevel = fs_get_msglevel,
 940         .set_msglevel = fs_set_msglevel,
 941         .set_tx_csum = ethtool_op_set_tx_csum,  /* local! */
 942         .set_sg = ethtool_op_set_sg,
 943         .get_regs = fs_get_regs,
 944 };
 945
 946 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 947 {
 948         struct fs_enet_private *fep = netdev_priv(dev);
 949         struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
 950
 951         if (!netif_running(dev))
 952                 return -EINVAL;
 953
 954         return phy_mii_ioctl(fep->phydev, mii, cmd);
 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 && fep->ops) {
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         const u32 *data;
1178
1179         data  = of_get_property(np, "fixed-link", NULL);
1180         if (data) {
1181                 snprintf(fpi->bus_id, 16, "%x:%02x", 0, *data);
1182                 return 0;
1183         }
1184
1185         data = of_get_property(np, "phy-handle", &len);
1186         if (!data || len != 4)
1187                 return -EINVAL;
1188
1189         phynode = of_find_node_by_phandle(*data);
1190         if (!phynode)
1191                 return -EINVAL;
1192
1193         mdionode = of_get_parent(phynode);
1194         if (!mdionode)
1195                 goto out_put_phy;
1196
1197         ret = of_address_to_resource(mdionode, 0, &res);
1198         if (ret)
1199                 goto out_put_mdio;
1200
1201         data = of_get_property(phynode, "reg", &len);
1202         if (!data || len != 4)
1203                 goto out_put_mdio;
1204
1205         snprintf(fpi->bus_id, 16, "%x:%02x", res.start, *data);
1206
1207 out_put_mdio:
1208         of_node_put(mdionode);
1209 out_put_phy:
1210         of_node_put(phynode);
1211         return ret;
1212 }
1213
1214 #ifdef CONFIG_FS_ENET_HAS_FEC
1215 #define IS_FEC(match) ((match)->data == &fs_fec_ops)
1216 #else
1217 #define IS_FEC(match) 0
1218 #endif
1219
1220 static int __devinit fs_enet_probe(struct of_device *ofdev,
1221                                    const struct of_device_id *match)
1222 {
1223         struct net_device *ndev;
1224         struct fs_enet_private *fep;
1225         struct fs_platform_info *fpi;
1226         const u32 *data;
1227         const u8 *mac_addr;
1228         int privsize, len, ret = -ENODEV;
1229
1230         fpi = kzalloc(sizeof(*fpi), GFP_KERNEL);
1231         if (!fpi)
1232                 return -ENOMEM;
1233
1234         if (!IS_FEC(match)) {
1235                 data = of_get_property(ofdev->node, "fsl,cpm-command", &len);
1236                 if (!data || len != 4)
1237                         goto out_free_fpi;
1238
1239                 fpi->cp_command = *data;
1240         }
1241
1242         fpi->rx_ring = 32;
1243         fpi->tx_ring = 32;
1244         fpi->rx_copybreak = 240;
1245         fpi->use_napi = 1;
1246         fpi->napi_weight = 17;
1247
1248         ret = find_phy(ofdev->node, fpi);
1249         if (ret)
1250                 goto out_free_fpi;
1251
1252         privsize = sizeof(*fep) +
1253                    sizeof(struct sk_buff **) *
1254                    (fpi->rx_ring + fpi->tx_ring);
1255
1256         ndev = alloc_etherdev(privsize);
1257         if (!ndev) {
1258                 ret = -ENOMEM;
1259                 goto out_free_fpi;
1260         }
1261
1262         dev_set_drvdata(&ofdev->dev, ndev);
1263
1264         fep = netdev_priv(ndev);
1265         fep->dev = &ofdev->dev;
1266         fep->ndev = ndev;
1267         fep->fpi = fpi;
1268         fep->ops = match->data;
1269
1270         ret = fep->ops->setup_data(ndev);
1271         if (ret)
1272                 goto out_free_dev;
1273
1274         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1275         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1276
1277         spin_lock_init(&fep->lock);
1278         spin_lock_init(&fep->tx_lock);
1279
1280         mac_addr = of_get_mac_address(ofdev->node);
1281         if (mac_addr)
1282                 memcpy(ndev->dev_addr, mac_addr, 6);
1283
1284         ret = fep->ops->allocate_bd(ndev);
1285         if (ret)
1286                 goto out_cleanup_data;
1287
1288         fep->rx_bd_base = fep->ring_base;
1289         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1290
1291         fep->tx_ring = fpi->tx_ring;
1292         fep->rx_ring = fpi->rx_ring;
1293
1294         ndev->open = fs_enet_open;
1295         ndev->hard_start_xmit = fs_enet_start_xmit;
1296         ndev->tx_timeout = fs_timeout;
1297         ndev->watchdog_timeo = 2 * HZ;
1298         ndev->stop = fs_enet_close;
1299         ndev->get_stats = fs_enet_get_stats;
1300         ndev->set_multicast_list = fs_set_multicast_list;
1301
1302         if (fpi->use_napi)
1303                 netif_napi_add(ndev, &fep->napi, fs_enet_rx_napi,
1304                                fpi->napi_weight);
1305
1306         ndev->ethtool_ops = &fs_ethtool_ops;
1307         ndev->do_ioctl = fs_ioctl;
1308
1309         init_timer(&fep->phy_timer_list);
1310
1311         netif_carrier_off(ndev);
1312
1313         ret = register_netdev(ndev);
1314         if (ret)
1315                 goto out_free_bd;
1316
1317         printk(KERN_INFO "%s: fs_enet: %02x:%02x:%02x:%02x:%02x:%02x\n",
1318                ndev->name,
1319                ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
1320                ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
1321
1322         return 0;
1323
1324 out_free_bd:
1325         fep->ops->free_bd(ndev);
1326 out_cleanup_data:
1327         fep->ops->cleanup_data(ndev);
1328 out_free_dev:
1329         free_netdev(ndev);
1330         dev_set_drvdata(&ofdev->dev, NULL);
1331 out_free_fpi:
1332         kfree(fpi);
1333         return ret;
1334 }
1335
1336 static int fs_enet_remove(struct of_device *ofdev)
1337 {
1338         struct net_device *ndev = dev_get_drvdata(&ofdev->dev);
1339         struct fs_enet_private *fep = netdev_priv(ndev);
1340
1341         unregister_netdev(ndev);
1342
1343         fep->ops->free_bd(ndev);
1344         fep->ops->cleanup_data(ndev);
1345         dev_set_drvdata(fep->dev, NULL);
1346
1347         free_netdev(ndev);
1348         return 0;
1349 }
1350
1351 static struct of_device_id fs_enet_match[] = {
1352 #ifdef CONFIG_FS_ENET_HAS_SCC
1353         {
1354                 .compatible = "fsl,cpm1-scc-enet",
1355                 .data = (void *)&fs_scc_ops,
1356         },
1357 #endif
1358 #ifdef CONFIG_FS_ENET_HAS_FCC
1359         {
1360                 .compatible = "fsl,cpm2-fcc-enet",
1361                 .data = (void *)&fs_fcc_ops,
1362         },
1363 #endif
1364 #ifdef CONFIG_FS_ENET_HAS_FEC
1365         {
1366                 .compatible = "fsl,pq1-fec-enet",
1367                 .data = (void *)&fs_fec_ops,
1368         },
1369 #endif
1370         {}
1371 };
1372
1373 static struct of_platform_driver fs_enet_driver = {
1374         .name   = "fs_enet",
1375         .match_table = fs_enet_match,
1376         .probe = fs_enet_probe,
1377         .remove = fs_enet_remove,
1378 };
1379
1380 static int __init fs_init(void)
1381 {
1382         int r = setup_immap();
1383         if (r != 0)
1384                 return r;
1385
1386         r = of_register_platform_driver(&fs_enet_driver);
1387         if (r != 0)
1388                 goto out;
1389
1390         return 0;
1391
1392 out:
1393         cleanup_immap();
1394         return r;
1395 }
1396
1397 static void __exit fs_cleanup(void)
1398 {
1399         of_unregister_platform_driver(&fs_enet_driver);
1400         cleanup_immap();
1401 }
1402 #else
1403 static int __devinit fs_enet_probe(struct device *dev)
1404 {
1405         struct net_device *ndev;
1406
1407         /* no fixup - no device */
1408         if (dev->platform_data == NULL) {
1409                 printk(KERN_INFO "fs_enet: "
1410                                 "probe called with no platform data; "
1411                                 "remove unused devices\n");
1412                 return -ENODEV;
1413         }
1414
1415         ndev = fs_init_instance(dev, dev->platform_data);
1416         if (IS_ERR(ndev))
1417                 return PTR_ERR(ndev);
1418         return 0;
1419 }
1420
1421 static int fs_enet_remove(struct device *dev)
1422 {
1423         return fs_cleanup_instance(dev_get_drvdata(dev));
1424 }
1425
1426 static struct device_driver fs_enet_fec_driver = {
1427         .name           = "fsl-cpm-fec",
1428         .bus            = &platform_bus_type,
1429         .probe          = fs_enet_probe,
1430         .remove         = fs_enet_remove,
1431 #ifdef CONFIG_PM
1432 /*      .suspend        = fs_enet_suspend,      TODO */
1433 /*      .resume         = fs_enet_resume,       TODO */
1434 #endif
1435 };
1436
1437 static struct device_driver fs_enet_scc_driver = {
1438         .name           = "fsl-cpm-scc",
1439         .bus            = &platform_bus_type,
1440         .probe          = fs_enet_probe,
1441         .remove         = fs_enet_remove,
1442 #ifdef CONFIG_PM
1443 /*      .suspend        = fs_enet_suspend,      TODO */
1444 /*      .resume         = fs_enet_resume,       TODO */
1445 #endif
1446 };
1447
1448 static struct device_driver fs_enet_fcc_driver = {
1449         .name           = "fsl-cpm-fcc",
1450         .bus            = &platform_bus_type,
1451         .probe          = fs_enet_probe,
1452         .remove         = fs_enet_remove,
1453 #ifdef CONFIG_PM
1454 /*      .suspend        = fs_enet_suspend,      TODO */
1455 /*      .resume         = fs_enet_resume,       TODO */
1456 #endif
1457 };
1458
1459 static int __init fs_init(void)
1460 {
1461         int r;
1462
1463         printk(KERN_INFO
1464                         "%s", version);
1465
1466         r = setup_immap();
1467         if (r != 0)
1468                 return r;
1469
1470 #ifdef CONFIG_FS_ENET_HAS_FCC
1471         /* let's insert mii stuff */
1472         r = fs_enet_mdio_bb_init();
1473
1474         if (r != 0) {
1475                 printk(KERN_ERR DRV_MODULE_NAME
1476                         "BB PHY init failed.\n");
1477                 return r;
1478         }
1479         r = driver_register(&fs_enet_fcc_driver);
1480         if (r != 0)
1481                 goto err;
1482 #endif
1483
1484 #ifdef CONFIG_FS_ENET_HAS_FEC
1485         r =  fs_enet_mdio_fec_init();
1486         if (r != 0) {
1487                 printk(KERN_ERR DRV_MODULE_NAME
1488                         "FEC PHY init failed.\n");
1489                 return r;
1490         }
1491
1492         r = driver_register(&fs_enet_fec_driver);
1493         if (r != 0)
1494                 goto err;
1495 #endif
1496
1497 #ifdef CONFIG_FS_ENET_HAS_SCC
1498         r = driver_register(&fs_enet_scc_driver);
1499         if (r != 0)
1500                 goto err;
1501 #endif
1502
1503         return 0;
1504 err:
1505         cleanup_immap();
1506         return r;
1507 }
1508
1509 static void __exit fs_cleanup(void)
1510 {
1511         driver_unregister(&fs_enet_fec_driver);
1512         driver_unregister(&fs_enet_fcc_driver);
1513         driver_unregister(&fs_enet_scc_driver);
1514         cleanup_immap();
1515 }
1516 #endif
1517
1518 #ifdef CONFIG_NET_POLL_CONTROLLER
1519 static void fs_enet_netpoll(struct net_device *dev)
1520 {
1521        disable_irq(dev->irq);
1522        fs_enet_interrupt(dev->irq, dev, NULL);
1523        enable_irq(dev->irq);
1524 }
1525 #endif
1526
1527 /**************************************************************************************/
1528
1529 module_init(fs_init);
1530 module_exit(fs_cleanup);