SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/fs_enet/fs_enet-main.c

   1 /*
   2  * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
   3  *
   4  * Copyright (c) 2003 Intracom S.A.
   5  *  by Pantelis Antoniou <panto@intracom.gr>
   6  *
   7  * 2005 (c) MontaVista Software, Inc.
   8  * Vitaly Bordug <vbordug@ru.mvista.com>
   9  *
  10  * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
  11  * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
  12  *
  13  * This file is licensed under the terms of the GNU General Public License
  14  * version 2. This program is licensed "as is" without any warranty of any
  15  * kind, whether express or implied.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/kernel.h>
  20 #include <linux/types.h>
  21 #include <linux/string.h>
  22 #include <linux/ptrace.h>
  23 #include <linux/errno.h>
  24 #include <linux/ioport.h>
  25 #include <linux/slab.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/init.h>
  28 #include <linux/delay.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/skbuff.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/mii.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/bitops.h>
  36 #include <linux/fs.h>
  37 #include <linux/platform_device.h>
  38 #include <linux/phy.h>
  39
  40 #include <linux/vmalloc.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/irq.h>
  43 #include <asm/uaccess.h>
  44
  45 #include "fs_enet.h"
  46
  47 /*************************************************/
  48
  49 static char version[] __devinitdata =
  50     DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")" "\n";
  51
  52 MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
  53 MODULE_DESCRIPTION("Freescale Ethernet Driver");
  54 MODULE_LICENSE("GPL");
  55 MODULE_VERSION(DRV_MODULE_VERSION);
  56
  57 int fs_enet_debug = -1;         /* -1 == use FS_ENET_DEF_MSG_ENABLE as value */
  58 module_param(fs_enet_debug, int, 0);
  59 MODULE_PARM_DESC(fs_enet_debug,
  60                  "Freescale bitmapped debugging message enable value");
  61
  62 #ifdef CONFIG_NET_POLL_CONTROLLER
  63 static void fs_enet_netpoll(struct net_device *dev);
  64 #endif
  65
  66 static void fs_set_multicast_list(struct net_device *dev)
  67 {
  68         struct fs_enet_private *fep = netdev_priv(dev);
  69
  70         (*fep->ops->set_multicast_list)(dev);
  71 }
  72
  73 /* NAPI receive function */
  74 static int fs_enet_rx_napi(struct napi_struct *napi, int budget)
  75 {
  76         struct fs_enet_private *fep = container_of(napi, struct fs_enet_private, napi);
  77         struct net_device *dev = to_net_dev(fep->dev);
  78         const struct fs_platform_info *fpi = fep->fpi;
  79         cbd_t *bdp;
  80         struct sk_buff *skb, *skbn, *skbt;
  81         int received = 0;
  82         u16 pkt_len, sc;
  83         int curidx;
  84
  85         if (!netif_running(dev))
  86                 return 0;
  87
  88         /*
  89          * First, grab all of the stats for the incoming packet.
  90          * These get messed up if we get called due to a busy condition.
  91          */
  92         bdp = fep->cur_rx;
  93
  94         /* clear RX status bits for napi*/
  95         (*fep->ops->napi_clear_rx_event)(dev);
  96
  97         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
  98                 curidx = bdp - fep->rx_bd_base;
  99
 100                 /*
 101                  * Since we have allocated space to hold a complete frame,
 102                  * the last indicator should be set.
 103                  */
 104                 if ((sc & BD_ENET_RX_LAST) == 0)
 105                         printk(KERN_WARNING DRV_MODULE_NAME
 106                                ": %s rcv is not +last\n",
 107                                dev->name);
 108
 109                 /*
 110                  * Check for errors.
 111                  */
 112                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 113                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 114                         fep->stats.rx_errors++;
 115                         /* Frame too long or too short. */
 116                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 117                                 fep->stats.rx_length_errors++;
 118                         /* Frame alignment */
 119                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 120                                 fep->stats.rx_frame_errors++;
 121                         /* CRC Error */
 122                         if (sc & BD_ENET_RX_CR)
 123                                 fep->stats.rx_crc_errors++;
 124                         /* FIFO overrun */
 125                         if (sc & BD_ENET_RX_OV)
 126                                 fep->stats.rx_crc_errors++;
 127
 128                         skb = fep->rx_skbuff[curidx];
 129
 130                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 131                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 132                                 DMA_FROM_DEVICE);
 133
 134                         skbn = skb;
 135
 136                 } else {
 137                         skb = fep->rx_skbuff[curidx];
 138
 139                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 140                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 141                                 DMA_FROM_DEVICE);
 142
 143                         /*
 144                          * Process the incoming frame.
 145                          */
 146                         fep->stats.rx_packets++;
 147                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 148                         fep->stats.rx_bytes += pkt_len + 4;
 149
 150                         if (pkt_len <= fpi->rx_copybreak) {
 151                                 /* +2 to make IP header L1 cache aligned */
 152                                 skbn = dev_alloc_skb(pkt_len + 2);
 153                                 if (skbn != NULL) {
 154                                         skb_reserve(skbn, 2);   /* align IP header */
 155                                         skb_copy_from_linear_data(skb,
 156                                                       skbn->data, pkt_len);
 157                                         /* swap */
 158                                         skbt = skb;
 159                                         skb = skbn;
 160                                         skbn = skbt;
 161                                 }
 162                         } else
 163                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 164
 165                         if (skbn != NULL) {
 166                                 skb_put(skb, pkt_len);  /* Make room */
 167                                 skb->protocol = eth_type_trans(skb, dev);
 168                                 received++;
 169                                 netif_receive_skb(skb);
 170                         } else {
 171                                 printk(KERN_WARNING DRV_MODULE_NAME
 172                                        ": %s Memory squeeze, dropping packet.\n",
 173                                        dev->name);
 174                                 fep->stats.rx_dropped++;
 175                                 skbn = skb;
 176                         }
 177                 }
 178
 179                 fep->rx_skbuff[curidx] = skbn;
 180                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 181                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 182                              DMA_FROM_DEVICE));
 183                 CBDW_DATLEN(bdp, 0);
 184                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 185
 186                 /*
 187                  * Update BD pointer to next entry.
 188                  */
 189                 if ((sc & BD_ENET_RX_WRAP) == 0)
 190                         bdp++;
 191                 else
 192                         bdp = fep->rx_bd_base;
 193
 194                 (*fep->ops->rx_bd_done)(dev);
 195
 196                 if (received >= budget)
 197                         break;
 198         }
 199
 200         fep->cur_rx = bdp;
 201
 202         if (received >= budget) {
 203                 /* done */
 204                 netif_rx_complete(dev, napi);
 205                 (*fep->ops->napi_enable_rx)(dev);
 206         }
 207         return received;
 208 }
 209
 210 /* non NAPI receive function */
 211 static int fs_enet_rx_non_napi(struct net_device *dev)
 212 {
 213         struct fs_enet_private *fep = netdev_priv(dev);
 214         const struct fs_platform_info *fpi = fep->fpi;
 215         cbd_t *bdp;
 216         struct sk_buff *skb, *skbn, *skbt;
 217         int received = 0;
 218         u16 pkt_len, sc;
 219         int curidx;
 220         /*
 221          * First, grab all of the stats for the incoming packet.
 222          * These get messed up if we get called due to a busy condition.
 223          */
 224         bdp = fep->cur_rx;
 225
 226         while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
 227
 228                 curidx = bdp - fep->rx_bd_base;
 229
 230                 /*
 231                  * Since we have allocated space to hold a complete frame,
 232                  * the last indicator should be set.
 233                  */
 234                 if ((sc & BD_ENET_RX_LAST) == 0)
 235                         printk(KERN_WARNING DRV_MODULE_NAME
 236                                ": %s rcv is not +last\n",
 237                                dev->name);
 238
 239                 /*
 240                  * Check for errors.
 241                  */
 242                 if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
 243                           BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
 244                         fep->stats.rx_errors++;
 245                         /* Frame too long or too short. */
 246                         if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
 247                                 fep->stats.rx_length_errors++;
 248                         /* Frame alignment */
 249                         if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
 250                                 fep->stats.rx_frame_errors++;
 251                         /* CRC Error */
 252                         if (sc & BD_ENET_RX_CR)
 253                                 fep->stats.rx_crc_errors++;
 254                         /* FIFO overrun */
 255                         if (sc & BD_ENET_RX_OV)
 256                                 fep->stats.rx_crc_errors++;
 257
 258                         skb = fep->rx_skbuff[curidx];
 259
 260                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 261                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 262                                 DMA_FROM_DEVICE);
 263
 264                         skbn = skb;
 265
 266                 } else {
 267
 268                         skb = fep->rx_skbuff[curidx];
 269
 270                         dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 271                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 272                                 DMA_FROM_DEVICE);
 273
 274                         /*
 275                          * Process the incoming frame.
 276                          */
 277                         fep->stats.rx_packets++;
 278                         pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
 279                         fep->stats.rx_bytes += pkt_len + 4;
 280
 281                         if (pkt_len <= fpi->rx_copybreak) {
 282                                 /* +2 to make IP header L1 cache aligned */
 283                                 skbn = dev_alloc_skb(pkt_len + 2);
 284                                 if (skbn != NULL) {
 285                                         skb_reserve(skbn, 2);   /* align IP header */
 286                                         skb_copy_from_linear_data(skb,
 287                                                       skbn->data, pkt_len);
 288                                         /* swap */
 289                                         skbt = skb;
 290                                         skb = skbn;
 291                                         skbn = skbt;
 292                                 }
 293                         } else
 294                                 skbn = dev_alloc_skb(ENET_RX_FRSIZE);
 295
 296                         if (skbn != NULL) {
 297                                 skb_put(skb, pkt_len);  /* Make room */
 298                                 skb->protocol = eth_type_trans(skb, dev);
 299                                 received++;
 300                                 netif_rx(skb);
 301                         } else {
 302                                 printk(KERN_WARNING DRV_MODULE_NAME
 303                                        ": %s Memory squeeze, dropping packet.\n",
 304                                        dev->name);
 305                                 fep->stats.rx_dropped++;
 306                                 skbn = skb;
 307                         }
 308                 }
 309
 310                 fep->rx_skbuff[curidx] = skbn;
 311                 CBDW_BUFADDR(bdp, dma_map_single(fep->dev, skbn->data,
 312                              L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 313                              DMA_FROM_DEVICE));
 314                 CBDW_DATLEN(bdp, 0);
 315                 CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
 316
 317                 /*
 318                  * Update BD pointer to next entry.
 319                  */
 320                 if ((sc & BD_ENET_RX_WRAP) == 0)
 321                         bdp++;
 322                 else
 323                         bdp = fep->rx_bd_base;
 324
 325                 (*fep->ops->rx_bd_done)(dev);
 326         }
 327
 328         fep->cur_rx = bdp;
 329
 330         return 0;
 331 }
 332
 333 static void fs_enet_tx(struct net_device *dev)
 334 {
 335         struct fs_enet_private *fep = netdev_priv(dev);
 336         cbd_t *bdp;
 337         struct sk_buff *skb;
 338         int dirtyidx, do_wake, do_restart;
 339         u16 sc;
 340
 341         spin_lock(&fep->tx_lock);
 342         bdp = fep->dirty_tx;
 343
 344         do_wake = do_restart = 0;
 345         while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
 346
 347                 dirtyidx = bdp - fep->tx_bd_base;
 348
 349                 if (fep->tx_free == fep->tx_ring)
 350                         break;
 351
 352                 skb = fep->tx_skbuff[dirtyidx];
 353
 354                 /*
 355                  * Check for errors.
 356                  */
 357                 if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
 358                           BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
 359
 360                         if (sc & BD_ENET_TX_HB) /* No heartbeat */
 361                                 fep->stats.tx_heartbeat_errors++;
 362                         if (sc & BD_ENET_TX_LC) /* Late collision */
 363                                 fep->stats.tx_window_errors++;
 364                         if (sc & BD_ENET_TX_RL) /* Retrans limit */
 365                                 fep->stats.tx_aborted_errors++;
 366                         if (sc & BD_ENET_TX_UN) /* Underrun */
 367                                 fep->stats.tx_fifo_errors++;
 368                         if (sc & BD_ENET_TX_CSL)        /* Carrier lost */
 369                                 fep->stats.tx_carrier_errors++;
 370
 371                         if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
 372                                 fep->stats.tx_errors++;
 373                                 do_restart = 1;
 374                         }
 375                 } else
 376                         fep->stats.tx_packets++;
 377
 378                 if (sc & BD_ENET_TX_READY)
 379                         printk(KERN_WARNING DRV_MODULE_NAME
 380                                ": %s HEY! Enet xmit interrupt and TX_READY.\n",
 381                                dev->name);
 382
 383                 /*
 384                  * Deferred means some collisions occurred during transmit,
 385                  * but we eventually sent the packet OK.
 386                  */
 387                 if (sc & BD_ENET_TX_DEF)
 388                         fep->stats.collisions++;
 389
 390                 /* unmap */
 391                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 392                                 skb->len, DMA_TO_DEVICE);
 393
 394                 /*
 395                  * Free the sk buffer associated with this last transmit.
 396                  */
 397                 dev_kfree_skb_irq(skb);
 398                 fep->tx_skbuff[dirtyidx] = NULL;
 399
 400                 /*
 401                  * Update pointer to next buffer descriptor to be transmitted.
 402                  */
 403                 if ((sc & BD_ENET_TX_WRAP) == 0)
 404                         bdp++;
 405                 else
 406                         bdp = fep->tx_bd_base;
 407
 408                 /*
 409                  * Since we have freed up a buffer, the ring is no longer
 410                  * full.
 411                  */
 412                 if (!fep->tx_free++)
 413                         do_wake = 1;
 414         }
 415
 416         fep->dirty_tx = bdp;
 417
 418         if (do_restart)
 419                 (*fep->ops->tx_restart)(dev);
 420
 421         spin_unlock(&fep->tx_lock);
 422
 423         if (do_wake)
 424                 netif_wake_queue(dev);
 425 }
 426
 427 /*
 428  * The interrupt handler.
 429  * This is called from the MPC core interrupt.
 430  */
 431 static irqreturn_t
 432 fs_enet_interrupt(int irq, void *dev_id)
 433 {
 434         struct net_device *dev = dev_id;
 435         struct fs_enet_private *fep;
 436         const struct fs_platform_info *fpi;
 437         u32 int_events;
 438         u32 int_clr_events;
 439         int nr, napi_ok;
 440         int handled;
 441
 442         fep = netdev_priv(dev);
 443         fpi = fep->fpi;
 444
 445         nr = 0;
 446         while ((int_events = (*fep->ops->get_int_events)(dev)) != 0) {
 447
 448                 nr++;
 449
 450                 int_clr_events = int_events;
 451                 if (fpi->use_napi)
 452                         int_clr_events &= ~fep->ev_napi_rx;
 453
 454                 (*fep->ops->clear_int_events)(dev, int_clr_events);
 455
 456                 if (int_events & fep->ev_err)
 457                         (*fep->ops->ev_error)(dev, int_events);
 458
 459                 if (int_events & fep->ev_rx) {
 460                         if (!fpi->use_napi)
 461                                 fs_enet_rx_non_napi(dev);
 462                         else {
 463                                 napi_ok = napi_schedule_prep(&fep->napi);
 464
 465                                 (*fep->ops->napi_disable_rx)(dev);
 466                                 (*fep->ops->clear_int_events)(dev, fep->ev_napi_rx);
 467
 468                                 /* NOTE: it is possible for FCCs in NAPI mode    */
 469                                 /* to submit a spurious interrupt while in poll  */
 470                                 if (napi_ok)
 471                                         __netif_rx_schedule(dev, &fep->napi);
 472                         }
 473                 }
 474
 475                 if (int_events & fep->ev_tx)
 476                         fs_enet_tx(dev);
 477         }
 478
 479         handled = nr > 0;
 480         return IRQ_RETVAL(handled);
 481 }
 482
 483 void fs_init_bds(struct net_device *dev)
 484 {
 485         struct fs_enet_private *fep = netdev_priv(dev);
 486         cbd_t *bdp;
 487         struct sk_buff *skb;
 488         int i;
 489
 490         fs_cleanup_bds(dev);
 491
 492         fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
 493         fep->tx_free = fep->tx_ring;
 494         fep->cur_rx = fep->rx_bd_base;
 495
 496         /*
 497          * Initialize the receive buffer descriptors.
 498          */
 499         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 500                 skb = dev_alloc_skb(ENET_RX_FRSIZE);
 501                 if (skb == NULL) {
 502                         printk(KERN_WARNING DRV_MODULE_NAME
 503                                ": %s Memory squeeze, unable to allocate skb\n",
 504                                dev->name);
 505                         break;
 506                 }
 507                 fep->rx_skbuff[i] = skb;
 508                 CBDW_BUFADDR(bdp,
 509                         dma_map_single(fep->dev, skb->data,
 510                                 L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 511                                 DMA_FROM_DEVICE));
 512                 CBDW_DATLEN(bdp, 0);    /* zero */
 513                 CBDW_SC(bdp, BD_ENET_RX_EMPTY |
 514                         ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
 515         }
 516         /*
 517          * if we failed, fillup remainder
 518          */
 519         for (; i < fep->rx_ring; i++, bdp++) {
 520                 fep->rx_skbuff[i] = NULL;
 521                 CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
 522         }
 523
 524         /*
 525          * ...and the same for transmit.
 526          */
 527         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 528                 fep->tx_skbuff[i] = NULL;
 529                 CBDW_BUFADDR(bdp, 0);
 530                 CBDW_DATLEN(bdp, 0);
 531                 CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
 532         }
 533 }
 534
 535 void fs_cleanup_bds(struct net_device *dev)
 536 {
 537         struct fs_enet_private *fep = netdev_priv(dev);
 538         struct sk_buff *skb;
 539         cbd_t *bdp;
 540         int i;
 541
 542         /*
 543          * Reset SKB transmit buffers.
 544          */
 545         for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
 546                 if ((skb = fep->tx_skbuff[i]) == NULL)
 547                         continue;
 548
 549                 /* unmap */
 550                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 551                                 skb->len, DMA_TO_DEVICE);
 552
 553                 fep->tx_skbuff[i] = NULL;
 554                 dev_kfree_skb(skb);
 555         }
 556
 557         /*
 558          * Reset SKB receive buffers
 559          */
 560         for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
 561                 if ((skb = fep->rx_skbuff[i]) == NULL)
 562                         continue;
 563
 564                 /* unmap */
 565                 dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
 566                         L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
 567                         DMA_FROM_DEVICE);
 568
 569                 fep->rx_skbuff[i] = NULL;
 570
 571                 dev_kfree_skb(skb);
 572         }
 573 }
 574
 575 /**********************************************************************************/
 576
 577 static int fs_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
 578 {
 579         struct fs_enet_private *fep = netdev_priv(dev);
 580         cbd_t *bdp;
 581         int curidx;
 582         u16 sc;
 583         unsigned long flags;
 584
 585         spin_lock_irqsave(&fep->tx_lock, flags);
 586
 587         /*
 588          * Fill in a Tx ring entry
 589          */
 590         bdp = fep->cur_tx;
 591
 592         if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
 593                 netif_stop_queue(dev);
 594                 spin_unlock_irqrestore(&fep->tx_lock, flags);
 595
 596                 /*
 597                  * Ooops.  All transmit buffers are full.  Bail out.
 598                  * This should not happen, since the tx queue should be stopped.
 599                  */
 600                 printk(KERN_WARNING DRV_MODULE_NAME
 601                        ": %s tx queue full!.\n", dev->name);
 602                 return NETDEV_TX_BUSY;
 603         }
 604
 605         curidx = bdp - fep->tx_bd_base;
 606         /*
 607          * Clear all of the status flags.
 608          */
 609         CBDC_SC(bdp, BD_ENET_TX_STATS);
 610
 611         /*
 612          * Save skb pointer.
 613          */
 614         fep->tx_skbuff[curidx] = skb;
 615
 616         fep->stats.tx_bytes += skb->len;
 617
 618         /*
 619          * Push the data cache so the CPM does not get stale memory data.
 620          */
 621         CBDW_BUFADDR(bdp, dma_map_single(fep->dev,
 622                                 skb->data, skb->len, DMA_TO_DEVICE));
 623         CBDW_DATLEN(bdp, skb->len);
 624
 625         dev->trans_start = jiffies;
 626
 627         /*
 628          * If this was the last BD in the ring, start at the beginning again.
 629          */
 630         if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
 631                 fep->cur_tx++;
 632         else
 633                 fep->cur_tx = fep->tx_bd_base;
 634
 635         if (!--fep->tx_free)
 636                 netif_stop_queue(dev);
 637
 638         /* Trigger transmission start */
 639         sc = BD_ENET_TX_READY | BD_ENET_TX_INTR |
 640              BD_ENET_TX_LAST | BD_ENET_TX_TC;
 641
 642         /* note that while FEC does not have this bit
 643          * it marks it as available for software use
 644          * yay for hw reuse :) */
 645         if (skb->len <= 60)
 646                 sc |= BD_ENET_TX_PAD;
 647         CBDS_SC(bdp, sc);
 648
 649         (*fep->ops->tx_kickstart)(dev);
 650
 651         spin_unlock_irqrestore(&fep->tx_lock, flags);
 652
 653         return NETDEV_TX_OK;
 654 }
 655
 656 static int fs_request_irq(struct net_device *dev, int irq, const char *name,
 657                 irq_handler_t irqf)
 658 {
 659         struct fs_enet_private *fep = netdev_priv(dev);
 660
 661         (*fep->ops->pre_request_irq)(dev, irq);
 662         return request_irq(irq, irqf, IRQF_SHARED, name, dev);
 663 }
 664
 665 static void fs_free_irq(struct net_device *dev, int irq)
 666 {
 667         struct fs_enet_private *fep = netdev_priv(dev);
 668
 669         free_irq(irq, dev);
 670         (*fep->ops->post_free_irq)(dev, irq);
 671 }
 672
 673 static void fs_timeout(struct net_device *dev)
 674 {
 675         struct fs_enet_private *fep = netdev_priv(dev);
 676         unsigned long flags;
 677         int wake = 0;
 678
 679         fep->stats.tx_errors++;
 680
 681         spin_lock_irqsave(&fep->lock, flags);
 682
 683         if (dev->flags & IFF_UP) {
 684                 phy_stop(fep->phydev);
 685                 (*fep->ops->stop)(dev);
 686                 (*fep->ops->restart)(dev);
 687                 phy_start(fep->phydev);
 688         }
 689
 690         phy_start(fep->phydev);
 691         wake = fep->tx_free && !(CBDR_SC(fep->cur_tx) & BD_ENET_TX_READY);
 692         spin_unlock_irqrestore(&fep->lock, flags);
 693
 694         if (wake)
 695                 netif_wake_queue(dev);
 696 }
 697
 698 /*-----------------------------------------------------------------------------
 699  *  generic link-change handler - should be sufficient for most cases
 700  *-----------------------------------------------------------------------------*/
 701 static void generic_adjust_link(struct  net_device *dev)
 702 {
 703        struct fs_enet_private *fep = netdev_priv(dev);
 704        struct phy_device *phydev = fep->phydev;
 705        int new_state = 0;
 706
 707        if (phydev->link) {
 708
 709                /* adjust to duplex mode */
 710                if (phydev->duplex != fep->oldduplex){
 711                        new_state = 1;
 712                        fep->oldduplex = phydev->duplex;
 713                }
 714
 715                if (phydev->speed != fep->oldspeed) {
 716                        new_state = 1;
 717                        fep->oldspeed = phydev->speed;
 718                }
 719
 720                if (!fep->oldlink) {
 721                        new_state = 1;
 722                        fep->oldlink = 1;
 723                        netif_schedule(dev);
 724                        netif_carrier_on(dev);
 725                        netif_start_queue(dev);
 726                }
 727
 728                if (new_state)
 729                        fep->ops->restart(dev);
 730
 731        } else if (fep->oldlink) {
 732                new_state = 1;
 733                fep->oldlink = 0;
 734                fep->oldspeed = 0;
 735                fep->oldduplex = -1;
 736                netif_carrier_off(dev);
 737                netif_stop_queue(dev);
 738        }
 739
 740        if (new_state && netif_msg_link(fep))
 741                phy_print_status(phydev);
 742 }
 743
 744
 745 static void fs_adjust_link(struct net_device *dev)
 746 {
 747         struct fs_enet_private *fep = netdev_priv(dev);
 748         unsigned long flags;
 749
 750         spin_lock_irqsave(&fep->lock, flags);
 751
 752         if(fep->ops->adjust_link)
 753                 fep->ops->adjust_link(dev);
 754         else
 755                 generic_adjust_link(dev);
 756
 757         spin_unlock_irqrestore(&fep->lock, flags);
 758 }
 759
 760 static int fs_init_phy(struct net_device *dev)
 761 {
 762         struct fs_enet_private *fep = netdev_priv(dev);
 763         struct phy_device *phydev;
 764
 765         fep->oldlink = 0;
 766         fep->oldspeed = 0;
 767         fep->oldduplex = -1;
 768         if(fep->fpi->bus_id)
 769                 phydev = phy_connect(dev, fep->fpi->bus_id, &fs_adjust_link, 0,
 770                                 PHY_INTERFACE_MODE_MII);
 771         else {
 772                 printk("No phy bus ID specified in BSP code\n");
 773                 return -EINVAL;
 774         }
 775         if (IS_ERR(phydev)) {
 776                 printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
 777                 return PTR_ERR(phydev);
 778         }
 779
 780         fep->phydev = phydev;
 781
 782         return 0;
 783 }
 784
 785
 786 static int fs_enet_open(struct net_device *dev)
 787 {
 788         struct fs_enet_private *fep = netdev_priv(dev);
 789         int r;
 790         int err;
 791
 792         napi_enable(&fep->napi);
 793
 794         /* Install our interrupt handler. */
 795         r = fs_request_irq(dev, fep->interrupt, "fs_enet-mac", fs_enet_interrupt);
 796         if (r != 0) {
 797                 printk(KERN_ERR DRV_MODULE_NAME
 798                        ": %s Could not allocate FS_ENET IRQ!", dev->name);
 799                 napi_disable(&fep->napi);
 800                 return -EINVAL;
 801         }
 802
 803         err = fs_init_phy(dev);
 804         if(err) {
 805                 napi_disable(&fep->napi);
 806                 return err;
 807         }
 808         phy_start(fep->phydev);
 809
 810         return 0;
 811 }
 812
 813 static int fs_enet_close(struct net_device *dev)
 814 {
 815         struct fs_enet_private *fep = netdev_priv(dev);
 816         unsigned long flags;
 817
 818         netif_stop_queue(dev);
 819         netif_carrier_off(dev);
 820         napi_disable(&fep->napi);
 821         phy_stop(fep->phydev);
 822
 823         spin_lock_irqsave(&fep->lock, flags);
 824         spin_lock(&fep->tx_lock);
 825         (*fep->ops->stop)(dev);
 826         spin_unlock(&fep->tx_lock);
 827         spin_unlock_irqrestore(&fep->lock, flags);
 828
 829         /* release any irqs */
 830         phy_disconnect(fep->phydev);
 831         fep->phydev = NULL;
 832         fs_free_irq(dev, fep->interrupt);
 833
 834         return 0;
 835 }
 836
 837 static struct net_device_stats *fs_enet_get_stats(struct net_device *dev)
 838 {
 839         struct fs_enet_private *fep = netdev_priv(dev);
 840         return &fep->stats;
 841 }
 842
 843 /*************************************************************************/
 844
 845 static void fs_get_drvinfo(struct net_device *dev,
 846                             struct ethtool_drvinfo *info)
 847 {
 848         strcpy(info->driver, DRV_MODULE_NAME);
 849         strcpy(info->version, DRV_MODULE_VERSION);
 850 }
 851
 852 static int fs_get_regs_len(struct net_device *dev)
 853 {
 854         struct fs_enet_private *fep = netdev_priv(dev);
 855
 856         return (*fep->ops->get_regs_len)(dev);
 857 }
 858
 859 static void fs_get_regs(struct net_device *dev, struct ethtool_regs *regs,
 860                          void *p)
 861 {
 862         struct fs_enet_private *fep = netdev_priv(dev);
 863         unsigned long flags;
 864         int r, len;
 865
 866         len = regs->len;
 867
 868         spin_lock_irqsave(&fep->lock, flags);
 869         r = (*fep->ops->get_regs)(dev, p, &len);
 870         spin_unlock_irqrestore(&fep->lock, flags);
 871
 872         if (r == 0)
 873                 regs->version = 0;
 874 }
 875
 876 static int fs_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 877 {
 878         struct fs_enet_private *fep = netdev_priv(dev);
 879         return phy_ethtool_gset(fep->phydev, cmd);
 880 }
 881
 882 static int fs_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 883 {
 884         struct fs_enet_private *fep = netdev_priv(dev);
 885         phy_ethtool_sset(fep->phydev, cmd);
 886         return 0;
 887 }
 888
 889 static int fs_nway_reset(struct net_device *dev)
 890 {
 891         return 0;
 892 }
 893
 894 static u32 fs_get_msglevel(struct net_device *dev)
 895 {
 896         struct fs_enet_private *fep = netdev_priv(dev);
 897         return fep->msg_enable;
 898 }
 899
 900 static void fs_set_msglevel(struct net_device *dev, u32 value)
 901 {
 902         struct fs_enet_private *fep = netdev_priv(dev);
 903         fep->msg_enable = value;
 904 }
 905
 906 static const struct ethtool_ops fs_ethtool_ops = {
 907         .get_drvinfo = fs_get_drvinfo,
 908         .get_regs_len = fs_get_regs_len,
 909         .get_settings = fs_get_settings,
 910         .set_settings = fs_set_settings,
 911         .nway_reset = fs_nway_reset,
 912         .get_link = ethtool_op_get_link,
 913         .get_msglevel = fs_get_msglevel,
 914         .set_msglevel = fs_set_msglevel,
 915         .set_tx_csum = ethtool_op_set_tx_csum,  /* local! */
 916         .set_sg = ethtool_op_set_sg,
 917         .get_regs = fs_get_regs,
 918 };
 919
 920 static int fs_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 921 {
 922         struct fs_enet_private *fep = netdev_priv(dev);
 923         struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
 924         unsigned long flags;
 925         int rc;
 926
 927         if (!netif_running(dev))
 928                 return -EINVAL;
 929
 930         spin_lock_irqsave(&fep->lock, flags);
 931         rc = phy_mii_ioctl(fep->phydev, mii, cmd);
 932         spin_unlock_irqrestore(&fep->lock, flags);
 933         return rc;
 934 }
 935
 936 extern int fs_mii_connect(struct net_device *dev);
 937 extern void fs_mii_disconnect(struct net_device *dev);
 938
 939 static struct net_device *fs_init_instance(struct device *dev,
 940                 struct fs_platform_info *fpi)
 941 {
 942         struct net_device *ndev = NULL;
 943         struct fs_enet_private *fep = NULL;
 944         int privsize, i, r, err = 0, registered = 0;
 945
 946         fpi->fs_no = fs_get_id(fpi);
 947         /* guard */
 948         if ((unsigned int)fpi->fs_no >= FS_MAX_INDEX)
 949                 return ERR_PTR(-EINVAL);
 950
 951         privsize = sizeof(*fep) + (sizeof(struct sk_buff **) *
 952                             (fpi->rx_ring + fpi->tx_ring));
 953
 954         ndev = alloc_etherdev(privsize);
 955         if (!ndev) {
 956                 err = -ENOMEM;
 957                 goto err;
 958         }
 959
 960         fep = netdev_priv(ndev);
 961
 962         fep->dev = dev;
 963         dev_set_drvdata(dev, ndev);
 964         fep->fpi = fpi;
 965         if (fpi->init_ioports)
 966                 fpi->init_ioports((struct fs_platform_info *)fpi);
 967
 968 #ifdef CONFIG_FS_ENET_HAS_FEC
 969         if (fs_get_fec_index(fpi->fs_no) >= 0)
 970                 fep->ops = &fs_fec_ops;
 971 #endif
 972
 973 #ifdef CONFIG_FS_ENET_HAS_SCC
 974         if (fs_get_scc_index(fpi->fs_no) >=0 )
 975                 fep->ops = &fs_scc_ops;
 976 #endif
 977
 978 #ifdef CONFIG_FS_ENET_HAS_FCC
 979         if (fs_get_fcc_index(fpi->fs_no) >= 0)
 980                 fep->ops = &fs_fcc_ops;
 981 #endif
 982
 983         if (fep->ops == NULL) {
 984                 printk(KERN_ERR DRV_MODULE_NAME
 985                        ": %s No matching ops found (%d).\n",
 986                        ndev->name, fpi->fs_no);
 987                 err = -EINVAL;
 988                 goto err;
 989         }
 990
 991         r = (*fep->ops->setup_data)(ndev);
 992         if (r != 0) {
 993                 printk(KERN_ERR DRV_MODULE_NAME
 994                        ": %s setup_data failed\n",
 995                         ndev->name);
 996                 err = r;
 997                 goto err;
 998         }
 999
1000         /* point rx_skbuff, tx_skbuff */
1001         fep->rx_skbuff = (struct sk_buff **)&fep[1];
1002         fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
1003
1004         /* init locks */
1005         spin_lock_init(&fep->lock);
1006         spin_lock_init(&fep->tx_lock);
1007
1008         /*
1009          * Set the Ethernet address.
1010          */
1011         for (i = 0; i < 6; i++)
1012                 ndev->dev_addr[i] = fpi->macaddr[i];
1013
1014         r = (*fep->ops->allocate_bd)(ndev);
1015
1016         if (fep->ring_base == NULL) {
1017                 printk(KERN_ERR DRV_MODULE_NAME
1018                        ": %s buffer descriptor alloc failed (%d).\n", ndev->name, r);
1019                 err = r;
1020                 goto err;
1021         }
1022
1023         /*
1024          * Set receive and transmit descriptor base.
1025          */
1026         fep->rx_bd_base = fep->ring_base;
1027         fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
1028
1029         /* initialize ring size variables */
1030         fep->tx_ring = fpi->tx_ring;
1031         fep->rx_ring = fpi->rx_ring;
1032
1033         /*
1034          * The FEC Ethernet specific entries in the device structure.
1035          */
1036         ndev->open = fs_enet_open;
1037         ndev->hard_start_xmit = fs_enet_start_xmit;
1038         ndev->tx_timeout = fs_timeout;
1039         ndev->watchdog_timeo = 2 * HZ;
1040         ndev->stop = fs_enet_close;
1041         ndev->get_stats = fs_enet_get_stats;
1042         ndev->set_multicast_list = fs_set_multicast_list;
1043
1044 #ifdef CONFIG_NET_POLL_CONTROLLER
1045         ndev->poll_controller = fs_enet_netpoll;
1046 #endif
1047
1048         netif_napi_add(ndev, &fep->napi,
1049                        fs_enet_rx_napi, fpi->napi_weight);
1050
1051         ndev->ethtool_ops = &fs_ethtool_ops;
1052         ndev->do_ioctl = fs_ioctl;
1053
1054         init_timer(&fep->phy_timer_list);
1055
1056         netif_carrier_off(ndev);
1057
1058         err = register_netdev(ndev);
1059         if (err != 0) {
1060                 printk(KERN_ERR DRV_MODULE_NAME
1061                        ": %s register_netdev failed.\n", ndev->name);
1062                 goto err;
1063         }
1064         registered = 1;
1065
1066
1067         return ndev;
1068
1069       err:
1070         if (ndev != NULL) {
1071
1072                 if (registered)
1073                         unregister_netdev(ndev);
1074
1075                 if (fep != NULL) {
1076                         (*fep->ops->free_bd)(ndev);
1077                         (*fep->ops->cleanup_data)(ndev);
1078                 }
1079
1080                 free_netdev(ndev);
1081         }
1082
1083         dev_set_drvdata(dev, NULL);
1084
1085         return ERR_PTR(err);
1086 }
1087
1088 static int fs_cleanup_instance(struct net_device *ndev)
1089 {
1090         struct fs_enet_private *fep;
1091         const struct fs_platform_info *fpi;
1092         struct device *dev;
1093
1094         if (ndev == NULL)
1095                 return -EINVAL;
1096
1097         fep = netdev_priv(ndev);
1098         if (fep == NULL)
1099                 return -EINVAL;
1100
1101         fpi = fep->fpi;
1102
1103         unregister_netdev(ndev);
1104
1105         dma_free_coherent(fep->dev, (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
1106                           fep->ring_base, fep->ring_mem_addr);
1107
1108         /* reset it */
1109         (*fep->ops->cleanup_data)(ndev);
1110
1111         dev = fep->dev;
1112         if (dev != NULL) {
1113                 dev_set_drvdata(dev, NULL);
1114                 fep->dev = NULL;
1115         }
1116
1117         free_netdev(ndev);
1118
1119         return 0;
1120 }
1121
1122 /**************************************************************************************/
1123
1124 /* handy pointer to the immap */
1125 void *fs_enet_immap = NULL;
1126
1127 static int setup_immap(void)
1128 {
1129         phys_addr_t paddr = 0;
1130         unsigned long size = 0;
1131
1132 #ifdef CONFIG_CPM1
1133         paddr = IMAP_ADDR;
1134         size = 0x10000; /* map 64K */
1135 #endif
1136
1137 #ifdef CONFIG_CPM2
1138         paddr = CPM_MAP_ADDR;
1139         size = 0x40000; /* map 256 K */
1140 #endif
1141         fs_enet_immap = ioremap(paddr, size);
1142         if (fs_enet_immap == NULL)
1143                 return -EBADF;  /* XXX ahem; maybe just BUG_ON? */
1144
1145         return 0;
1146 }
1147
1148 static void cleanup_immap(void)
1149 {
1150         if (fs_enet_immap != NULL) {
1151                 iounmap(fs_enet_immap);
1152                 fs_enet_immap = NULL;
1153         }
1154 }
1155
1156 /**************************************************************************************/
1157
1158 static int __devinit fs_enet_probe(struct device *dev)
1159 {
1160         struct net_device *ndev;
1161
1162         /* no fixup - no device */
1163         if (dev->platform_data == NULL) {
1164                 printk(KERN_INFO "fs_enet: "
1165                                 "probe called with no platform data; "
1166                                 "remove unused devices\n");
1167                 return -ENODEV;
1168         }
1169
1170         ndev = fs_init_instance(dev, dev->platform_data);
1171         if (IS_ERR(ndev))
1172                 return PTR_ERR(ndev);
1173         return 0;
1174 }
1175
1176 static int fs_enet_remove(struct device *dev)
1177 {
1178         return fs_cleanup_instance(dev_get_drvdata(dev));
1179 }
1180
1181 static struct device_driver fs_enet_fec_driver = {
1182         .name           = "fsl-cpm-fec",
1183         .bus            = &platform_bus_type,
1184         .probe          = fs_enet_probe,
1185         .remove         = fs_enet_remove,
1186 #ifdef CONFIG_PM
1187 /*      .suspend        = fs_enet_suspend,      TODO */
1188 /*      .resume         = fs_enet_resume,       TODO */
1189 #endif
1190 };
1191
1192 static struct device_driver fs_enet_scc_driver = {
1193         .name           = "fsl-cpm-scc",
1194         .bus            = &platform_bus_type,
1195         .probe          = fs_enet_probe,
1196         .remove         = fs_enet_remove,
1197 #ifdef CONFIG_PM
1198 /*      .suspend        = fs_enet_suspend,      TODO */
1199 /*      .resume         = fs_enet_resume,       TODO */
1200 #endif
1201 };
1202
1203 static struct device_driver fs_enet_fcc_driver = {
1204         .name           = "fsl-cpm-fcc",
1205         .bus            = &platform_bus_type,
1206         .probe          = fs_enet_probe,
1207         .remove         = fs_enet_remove,
1208 #ifdef CONFIG_PM
1209 /*      .suspend        = fs_enet_suspend,      TODO */
1210 /*      .resume         = fs_enet_resume,       TODO */
1211 #endif
1212 };
1213
1214 static int __init fs_init(void)
1215 {
1216         int r;
1217
1218         printk(KERN_INFO
1219                         "%s", version);
1220
1221         r = setup_immap();
1222         if (r != 0)
1223                 return r;
1224
1225 #ifdef CONFIG_FS_ENET_HAS_FCC
1226         /* let's insert mii stuff */
1227         r = fs_enet_mdio_bb_init();
1228
1229         if (r != 0) {
1230                 printk(KERN_ERR DRV_MODULE_NAME
1231                         "BB PHY init failed.\n");
1232                 return r;
1233         }
1234         r = driver_register(&fs_enet_fcc_driver);
1235         if (r != 0)
1236                 goto err;
1237 #endif
1238
1239 #ifdef CONFIG_FS_ENET_HAS_FEC
1240         r =  fs_enet_mdio_fec_init();
1241         if (r != 0) {
1242                 printk(KERN_ERR DRV_MODULE_NAME
1243                         "FEC PHY init failed.\n");
1244                 return r;
1245         }
1246
1247         r = driver_register(&fs_enet_fec_driver);
1248         if (r != 0)
1249                 goto err;
1250 #endif
1251
1252 #ifdef CONFIG_FS_ENET_HAS_SCC
1253         r = driver_register(&fs_enet_scc_driver);
1254         if (r != 0)
1255                 goto err;
1256 #endif
1257
1258         return 0;
1259 err:
1260         cleanup_immap();
1261         return r;
1262
1263 }
1264
1265 static void __exit fs_cleanup(void)
1266 {
1267         driver_unregister(&fs_enet_fec_driver);
1268         driver_unregister(&fs_enet_fcc_driver);
1269         driver_unregister(&fs_enet_scc_driver);
1270         cleanup_immap();
1271 }
1272
1273 #ifdef CONFIG_NET_POLL_CONTROLLER
1274 static void fs_enet_netpoll(struct net_device *dev)
1275 {
1276        disable_irq(dev->irq);
1277        fs_enet_interrupt(dev->irq, dev, NULL);
1278        enable_irq(dev->irq);
1279 }
1280 #endif
1281
1282 /**************************************************************************************/
1283
1284 module_init(fs_init);
1285 module_exit(fs_cleanup);