kernel/drivers/net/ethernet/natsemi/sonic.c

   1 /*
   2  * sonic.c
   3  *
   4  * (C) 2005 Finn Thain
   5  *
   6  * Converted to DMA API, added zero-copy buffer handling, and
   7  * (from the mac68k project) introduced dhd's support for 16-bit cards.
   8  *
   9  * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
  10  *
  11  * This driver is based on work from Andreas Busse, but most of
  12  * the code is rewritten.
  13  *
  14  * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
  15  *
  16  *    Core code included by system sonic drivers
  17  *
  18  * And... partially rewritten again by David Huggins-Daines in order
  19  * to cope with screwed up Macintosh NICs that may or may not use
  20  * 16-bit DMA.
  21  *
  22  * (C) 1999 David Huggins-Daines <dhd@debian.org>
  23  *
  24  */
  25
  26 /*
  27  * Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
  28  * National Semiconductors data sheet for the DP83932B Sonic Ethernet
  29  * controller, and the files "8390.c" and "skeleton.c" in this directory.
  30  *
  31  * Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
  32  * Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
  33  * the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
  34  */
  35
  36
  37
  38 /*
  39  * Open/initialize the SONIC controller.
  40  *
  41  * This routine should set everything up anew at each open, even
  42  *  registers that "should" only need to be set once at boot, so that
  43  *  there is non-reboot way to recover if something goes wrong.
  44  */
  45 static int sonic_open(struct net_device *dev)
  46 {
  47         struct sonic_local *lp = netdev_priv(dev);
  48         int i;
  49
  50         if (sonic_debug > 2)
  51                 printk("sonic_open: initializing sonic driver.\n");
  52
  53         for (i = 0; i < SONIC_NUM_RRS; i++) {
  54                 struct sk_buff *skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
  55                 if (skb == NULL) {
  56                         while(i > 0) { /* free any that were allocated successfully */
  57                                 i--;
  58                                 dev_kfree_skb(lp->rx_skb[i]);
  59                                 lp->rx_skb[i] = NULL;
  60                         }
  61                         printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
  62                                dev->name);
  63                         return -ENOMEM;
  64                 }
  65                 /* align IP header unless DMA requires otherwise */
  66                 if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
  67                         skb_reserve(skb, 2);
  68                 lp->rx_skb[i] = skb;
  69         }
  70
  71         for (i = 0; i < SONIC_NUM_RRS; i++) {
  72                 dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
  73                                                   SONIC_RBSIZE, DMA_FROM_DEVICE);
  74                 if (!laddr) {
  75                         while(i > 0) { /* free any that were mapped successfully */
  76                                 i--;
  77                                 dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
  78                                 lp->rx_laddr[i] = (dma_addr_t)0;
  79                         }
  80                         for (i = 0; i < SONIC_NUM_RRS; i++) {
  81                                 dev_kfree_skb(lp->rx_skb[i]);
  82                                 lp->rx_skb[i] = NULL;
  83                         }
  84                         printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
  85                                dev->name);
  86                         return -ENOMEM;
  87                 }
  88                 lp->rx_laddr[i] = laddr;
  89         }
  90
  91         /*
  92          * Initialize the SONIC
  93          */
  94         sonic_init(dev);
  95
  96         netif_start_queue(dev);
  97
  98         if (sonic_debug > 2)
  99                 printk("sonic_open: Initialization done.\n");
 100
 101         return 0;
 102 }
 103
 104
 105 /*
 106  * Close the SONIC device
 107  */
 108 static int sonic_close(struct net_device *dev)
 109 {
 110         struct sonic_local *lp = netdev_priv(dev);
 111         int i;
 112
 113         if (sonic_debug > 2)
 114                 printk("sonic_close\n");
 115
 116         netif_stop_queue(dev);
 117
 118         /*
 119          * stop the SONIC, disable interrupts
 120          */
 121         SONIC_WRITE(SONIC_IMR, 0);
 122         SONIC_WRITE(SONIC_ISR, 0x7fff);
 123         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 124
 125         /* unmap and free skbs that haven't been transmitted */
 126         for (i = 0; i < SONIC_NUM_TDS; i++) {
 127                 if(lp->tx_laddr[i]) {
 128                         dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
 129                         lp->tx_laddr[i] = (dma_addr_t)0;
 130                 }
 131                 if(lp->tx_skb[i]) {
 132                         dev_kfree_skb(lp->tx_skb[i]);
 133                         lp->tx_skb[i] = NULL;
 134                 }
 135         }
 136
 137         /* unmap and free the receive buffers */
 138         for (i = 0; i < SONIC_NUM_RRS; i++) {
 139                 if(lp->rx_laddr[i]) {
 140                         dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
 141                         lp->rx_laddr[i] = (dma_addr_t)0;
 142                 }
 143                 if(lp->rx_skb[i]) {
 144                         dev_kfree_skb(lp->rx_skb[i]);
 145                         lp->rx_skb[i] = NULL;
 146                 }
 147         }
 148
 149         return 0;
 150 }
 151
 152 static void sonic_tx_timeout(struct net_device *dev)
 153 {
 154         struct sonic_local *lp = netdev_priv(dev);
 155         int i;
 156         /*
 157          * put the Sonic into software-reset mode and
 158          * disable all interrupts before releasing DMA buffers
 159          */
 160         SONIC_WRITE(SONIC_IMR, 0);
 161         SONIC_WRITE(SONIC_ISR, 0x7fff);
 162         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 163         /* We could resend the original skbs. Easier to re-initialise. */
 164         for (i = 0; i < SONIC_NUM_TDS; i++) {
 165                 if(lp->tx_laddr[i]) {
 166                         dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
 167                         lp->tx_laddr[i] = (dma_addr_t)0;
 168                 }
 169                 if(lp->tx_skb[i]) {
 170                         dev_kfree_skb(lp->tx_skb[i]);
 171                         lp->tx_skb[i] = NULL;
 172                 }
 173         }
 174         /* Try to restart the adaptor. */
 175         sonic_init(dev);
 176         lp->stats.tx_errors++;
 177         dev->trans_start = jiffies; /* prevent tx timeout */
 178         netif_wake_queue(dev);
 179 }
 180
 181 /*
 182  * transmit packet
 183  *
 184  * Appends new TD during transmission thus avoiding any TX interrupts
 185  * until we run out of TDs.
 186  * This routine interacts closely with the ISR in that it may,
 187  *   set tx_skb[i]
 188  *   reset the status flags of the new TD
 189  *   set and reset EOL flags
 190  *   stop the tx queue
 191  * The ISR interacts with this routine in various ways. It may,
 192  *   reset tx_skb[i]
 193  *   test the EOL and status flags of the TDs
 194  *   wake the tx queue
 195  * Concurrently with all of this, the SONIC is potentially writing to
 196  * the status flags of the TDs.
 197  * Until some mutual exclusion is added, this code will not work with SMP. However,
 198  * MIPS Jazz machines and m68k Macs were all uni-processor machines.
 199  */
 200
 201 static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
 202 {
 203         struct sonic_local *lp = netdev_priv(dev);
 204         dma_addr_t laddr;
 205         int length;
 206         int entry = lp->next_tx;
 207
 208         if (sonic_debug > 2)
 209                 printk("sonic_send_packet: skb=%p, dev=%p\n", skb, dev);
 210
 211         length = skb->len;
 212         if (length < ETH_ZLEN) {
 213                 if (skb_padto(skb, ETH_ZLEN))
 214                         return NETDEV_TX_OK;
 215                 length = ETH_ZLEN;
 216         }
 217
 218         /*
 219          * Map the packet data into the logical DMA address space
 220          */
 221
 222         laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
 223         if (!laddr) {
 224                 printk(KERN_ERR "%s: failed to map tx DMA buffer.\n", dev->name);
 225                 dev_kfree_skb(skb);
 226                 return NETDEV_TX_BUSY;
 227         }
 228
 229         sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0);       /* clear status */
 230         sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1);   /* single fragment */
 231         sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
 232         sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
 233         sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
 234         sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
 235         sonic_tda_put(dev, entry, SONIC_TD_LINK,
 236                 sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
 237
 238         /*
 239          * Must set tx_skb[entry] only after clearing status, and
 240          * before clearing EOL and before stopping queue
 241          */
 242         wmb();
 243         lp->tx_len[entry] = length;
 244         lp->tx_laddr[entry] = laddr;
 245         lp->tx_skb[entry] = skb;
 246
 247         wmb();
 248         sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK,
 249                                   sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK) & ~SONIC_EOL);
 250         lp->eol_tx = entry;
 251
 252         lp->next_tx = (entry + 1) & SONIC_TDS_MASK;
 253         if (lp->tx_skb[lp->next_tx] != NULL) {
 254                 /* The ring is full, the ISR has yet to process the next TD. */
 255                 if (sonic_debug > 3)
 256                         printk("%s: stopping queue\n", dev->name);
 257                 netif_stop_queue(dev);
 258                 /* after this packet, wait for ISR to free up some TDAs */
 259         } else netif_start_queue(dev);
 260
 261         if (sonic_debug > 2)
 262                 printk("sonic_send_packet: issuing Tx command\n");
 263
 264         SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
 265
 266         return NETDEV_TX_OK;
 267 }
 268
 269 /*
 270  * The typical workload of the driver:
 271  * Handle the network interface interrupts.
 272  */
 273 static irqreturn_t sonic_interrupt(int irq, void *dev_id)
 274 {
 275         struct net_device *dev = dev_id;
 276         struct sonic_local *lp = netdev_priv(dev);
 277         int status;
 278
 279         if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
 280                 return IRQ_NONE;
 281
 282         do {
 283                 if (status & SONIC_INT_PKTRX) {
 284                         if (sonic_debug > 2)
 285                                 printk("%s: packet rx\n", dev->name);
 286                         sonic_rx(dev);  /* got packet(s) */
 287                         SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
 288                 }
 289
 290                 if (status & SONIC_INT_TXDN) {
 291                         int entry = lp->cur_tx;
 292                         int td_status;
 293                         int freed_some = 0;
 294
 295                         /* At this point, cur_tx is the index of a TD that is one of:
 296                          *   unallocated/freed                          (status set   & tx_skb[entry] clear)
 297                          *   allocated and sent                         (status set   & tx_skb[entry] set  )
 298                          *   allocated and not yet sent                 (status clear & tx_skb[entry] set  )
 299                          *   still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
 300                          */
 301
 302                         if (sonic_debug > 2)
 303                                 printk("%s: tx done\n", dev->name);
 304
 305                         while (lp->tx_skb[entry] != NULL) {
 306                                 if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
 307                                         break;
 308
 309                                 if (td_status & 0x0001) {
 310                                         lp->stats.tx_packets++;
 311                                         lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
 312                                 } else {
 313                                         lp->stats.tx_errors++;
 314                                         if (td_status & 0x0642)
 315                                                 lp->stats.tx_aborted_errors++;
 316                                         if (td_status & 0x0180)
 317                                                 lp->stats.tx_carrier_errors++;
 318                                         if (td_status & 0x0020)
 319                                                 lp->stats.tx_window_errors++;
 320                                         if (td_status & 0x0004)
 321                                                 lp->stats.tx_fifo_errors++;
 322                                 }
 323
 324                                 /* We must free the original skb */
 325                                 dev_kfree_skb_irq(lp->tx_skb[entry]);
 326                                 lp->tx_skb[entry] = NULL;
 327                                 /* and unmap DMA buffer */
 328                                 dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
 329                                 lp->tx_laddr[entry] = (dma_addr_t)0;
 330                                 freed_some = 1;
 331
 332                                 if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
 333                                         entry = (entry + 1) & SONIC_TDS_MASK;
 334                                         break;
 335                                 }
 336                                 entry = (entry + 1) & SONIC_TDS_MASK;
 337                         }
 338
 339                         if (freed_some || lp->tx_skb[entry] == NULL)
 340                                 netif_wake_queue(dev);  /* The ring is no longer full */
 341                         lp->cur_tx = entry;
 342                         SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
 343                 }
 344
 345                 /*
 346                  * check error conditions
 347                  */
 348                 if (status & SONIC_INT_RFO) {
 349                         if (sonic_debug > 1)
 350                                 printk("%s: rx fifo overrun\n", dev->name);
 351                         lp->stats.rx_fifo_errors++;
 352                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
 353                 }
 354                 if (status & SONIC_INT_RDE) {
 355                         if (sonic_debug > 1)
 356                                 printk("%s: rx descriptors exhausted\n", dev->name);
 357                         lp->stats.rx_dropped++;
 358                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
 359                 }
 360                 if (status & SONIC_INT_RBAE) {
 361                         if (sonic_debug > 1)
 362                                 printk("%s: rx buffer area exceeded\n", dev->name);
 363                         lp->stats.rx_dropped++;
 364                         SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
 365                 }
 366
 367                 /* counter overruns; all counters are 16bit wide */
 368                 if (status & SONIC_INT_FAE) {
 369                         lp->stats.rx_frame_errors += 65536;
 370                         SONIC_WRITE(SONIC_ISR, SONIC_INT_FAE); /* clear the interrupt */
 371                 }
 372                 if (status & SONIC_INT_CRC) {
 373                         lp->stats.rx_crc_errors += 65536;
 374                         SONIC_WRITE(SONIC_ISR, SONIC_INT_CRC); /* clear the interrupt */
 375                 }
 376                 if (status & SONIC_INT_MP) {
 377                         lp->stats.rx_missed_errors += 65536;
 378                         SONIC_WRITE(SONIC_ISR, SONIC_INT_MP); /* clear the interrupt */
 379                 }
 380
 381                 /* transmit error */
 382                 if (status & SONIC_INT_TXER) {
 383                         if ((SONIC_READ(SONIC_TCR) & SONIC_TCR_FU) && (sonic_debug > 2))
 384                                 printk(KERN_ERR "%s: tx fifo underrun\n", dev->name);
 385                         SONIC_WRITE(SONIC_ISR, SONIC_INT_TXER); /* clear the interrupt */
 386                 }
 387
 388                 /* bus retry */
 389                 if (status & SONIC_INT_BR) {
 390                         printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
 391                                 dev->name);
 392                         /* ... to help debug DMA problems causing endless interrupts. */
 393                         /* Bounce the eth interface to turn on the interrupt again. */
 394                         SONIC_WRITE(SONIC_IMR, 0);
 395                         SONIC_WRITE(SONIC_ISR, SONIC_INT_BR); /* clear the interrupt */
 396                 }
 397
 398                 /* load CAM done */
 399                 if (status & SONIC_INT_LCD)
 400                         SONIC_WRITE(SONIC_ISR, SONIC_INT_LCD); /* clear the interrupt */
 401         } while((status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT));
 402         return IRQ_HANDLED;
 403 }
 404
 405 /*
 406  * We have a good packet(s), pass it/them up the network stack.
 407  */
 408 static void sonic_rx(struct net_device *dev)
 409 {
 410         struct sonic_local *lp = netdev_priv(dev);
 411         int status;
 412         int entry = lp->cur_rx;
 413
 414         while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
 415                 struct sk_buff *used_skb;
 416                 struct sk_buff *new_skb;
 417                 dma_addr_t new_laddr;
 418                 u16 bufadr_l;
 419                 u16 bufadr_h;
 420                 int pkt_len;
 421
 422                 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
 423                 if (status & SONIC_RCR_PRX) {
 424                         /* Malloc up new buffer. */
 425                         new_skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
 426                         if (new_skb == NULL) {
 427                                 lp->stats.rx_dropped++;
 428                                 break;
 429                         }
 430                         /* provide 16 byte IP header alignment unless DMA requires otherwise */
 431                         if(SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
 432                                 skb_reserve(new_skb, 2);
 433
 434                         new_laddr = dma_map_single(lp->device, skb_put(new_skb, SONIC_RBSIZE),
 435                                                SONIC_RBSIZE, DMA_FROM_DEVICE);
 436                         if (!new_laddr) {
 437                                 dev_kfree_skb(new_skb);
 438                                 printk(KERN_ERR "%s: Failed to map rx buffer, dropping packet.\n", dev->name);
 439                                 lp->stats.rx_dropped++;
 440                                 break;
 441                         }
 442
 443                         /* now we have a new skb to replace it, pass the used one up the stack */
 444                         dma_unmap_single(lp->device, lp->rx_laddr[entry], SONIC_RBSIZE, DMA_FROM_DEVICE);
 445                         used_skb = lp->rx_skb[entry];
 446                         pkt_len = sonic_rda_get(dev, entry, SONIC_RD_PKTLEN);
 447                         skb_trim(used_skb, pkt_len);
 448                         used_skb->protocol = eth_type_trans(used_skb, dev);
 449                         netif_rx(used_skb);
 450                         lp->stats.rx_packets++;
 451                         lp->stats.rx_bytes += pkt_len;
 452
 453                         /* and insert the new skb */
 454                         lp->rx_laddr[entry] = new_laddr;
 455                         lp->rx_skb[entry] = new_skb;
 456
 457                         bufadr_l = (unsigned long)new_laddr & 0xffff;
 458                         bufadr_h = (unsigned long)new_laddr >> 16;
 459                         sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, bufadr_l);
 460                         sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, bufadr_h);
 461                 } else {
 462                         /* This should only happen, if we enable accepting broken packets. */
 463                         lp->stats.rx_errors++;
 464                         if (status & SONIC_RCR_FAER)
 465                                 lp->stats.rx_frame_errors++;
 466                         if (status & SONIC_RCR_CRCR)
 467                                 lp->stats.rx_crc_errors++;
 468                 }
 469                 if (status & SONIC_RCR_LPKT) {
 470                         /*
 471                          * this was the last packet out of the current receive buffer
 472                          * give the buffer back to the SONIC
 473                          */
 474                         lp->cur_rwp += SIZEOF_SONIC_RR * SONIC_BUS_SCALE(lp->dma_bitmode);
 475                         if (lp->cur_rwp >= lp->rra_end) lp->cur_rwp = lp->rra_laddr & 0xffff;
 476                         SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
 477                         if (SONIC_READ(SONIC_ISR) & SONIC_INT_RBE) {
 478                                 if (sonic_debug > 2)
 479                                         printk("%s: rx buffer exhausted\n", dev->name);
 480                                 SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE); /* clear the flag */
 481                         }
 482                 } else
 483                         printk(KERN_ERR "%s: rx desc without RCR_LPKT. Shouldn't happen !?\n",
 484                              dev->name);
 485                 /*
 486                  * give back the descriptor
 487                  */
 488                 sonic_rda_put(dev, entry, SONIC_RD_LINK,
 489                         sonic_rda_get(dev, entry, SONIC_RD_LINK) | SONIC_EOL);
 490                 sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
 491                 sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK,
 492                         sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK) & ~SONIC_EOL);
 493                 lp->eol_rx = entry;
 494                 lp->cur_rx = entry = (entry + 1) & SONIC_RDS_MASK;
 495         }
 496         /*
 497          * If any worth-while packets have been received, netif_rx()
 498          * has done a mark_bh(NET_BH) for us and will work on them
 499          * when we get to the bottom-half routine.
 500          */
 501 }
 502
 503
 504 /*
 505  * Get the current statistics.
 506  * This may be called with the device open or closed.
 507  */
 508 static struct net_device_stats *sonic_get_stats(struct net_device *dev)
 509 {
 510         struct sonic_local *lp = netdev_priv(dev);
 511
 512         /* read the tally counter from the SONIC and reset them */
 513         lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
 514         SONIC_WRITE(SONIC_CRCT, 0xffff);
 515         lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
 516         SONIC_WRITE(SONIC_FAET, 0xffff);
 517         lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
 518         SONIC_WRITE(SONIC_MPT, 0xffff);
 519
 520         return &lp->stats;
 521 }
 522
 523
 524 /*
 525  * Set or clear the multicast filter for this adaptor.
 526  */
 527 static void sonic_multicast_list(struct net_device *dev)
 528 {
 529         struct sonic_local *lp = netdev_priv(dev);
 530         unsigned int rcr;
 531         struct netdev_hw_addr *ha;
 532         unsigned char *addr;
 533         int i;
 534
 535         rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
 536         rcr |= SONIC_RCR_BRD;   /* accept broadcast packets */
 537
 538         if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
 539                 rcr |= SONIC_RCR_PRO;
 540         } else {
 541                 if ((dev->flags & IFF_ALLMULTI) ||
 542                     (netdev_mc_count(dev) > 15)) {
 543                         rcr |= SONIC_RCR_AMC;
 544                 } else {
 545                         if (sonic_debug > 2)
 546                                 printk("sonic_multicast_list: mc_count %d\n",
 547                                        netdev_mc_count(dev));
 548                         sonic_set_cam_enable(dev, 1);  /* always enable our own address */
 549                         i = 1;
 550                         netdev_for_each_mc_addr(ha, dev) {
 551                                 addr = ha->addr;
 552                                 sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
 553                                 sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
 554                                 sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
 555                                 sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
 556                                 i++;
 557                         }
 558                         SONIC_WRITE(SONIC_CDC, 16);
 559                         /* issue Load CAM command */
 560                         SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
 561                         SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
 562                 }
 563         }
 564
 565         if (sonic_debug > 2)
 566                 printk("sonic_multicast_list: setting RCR=%x\n", rcr);
 567
 568         SONIC_WRITE(SONIC_RCR, rcr);
 569 }
 570
 571
 572 /*
 573  * Initialize the SONIC ethernet controller.
 574  */
 575 static int sonic_init(struct net_device *dev)
 576 {
 577         unsigned int cmd;
 578         struct sonic_local *lp = netdev_priv(dev);
 579         int i;
 580
 581         /*
 582          * put the Sonic into software-reset mode and
 583          * disable all interrupts
 584          */
 585         SONIC_WRITE(SONIC_IMR, 0);
 586         SONIC_WRITE(SONIC_ISR, 0x7fff);
 587         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 588
 589         /*
 590          * clear software reset flag, disable receiver, clear and
 591          * enable interrupts, then completely initialize the SONIC
 592          */
 593         SONIC_WRITE(SONIC_CMD, 0);
 594         SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
 595
 596         /*
 597          * initialize the receive resource area
 598          */
 599         if (sonic_debug > 2)
 600                 printk("sonic_init: initialize receive resource area\n");
 601
 602         for (i = 0; i < SONIC_NUM_RRS; i++) {
 603                 u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
 604                 u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
 605                 sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
 606                 sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
 607                 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
 608                 sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
 609         }
 610
 611         /* initialize all RRA registers */
 612         lp->rra_end = (lp->rra_laddr + SONIC_NUM_RRS * SIZEOF_SONIC_RR *
 613                                         SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
 614         lp->cur_rwp = (lp->rra_laddr + (SONIC_NUM_RRS - 1) * SIZEOF_SONIC_RR *
 615                                         SONIC_BUS_SCALE(lp->dma_bitmode)) & 0xffff;
 616
 617         SONIC_WRITE(SONIC_RSA, lp->rra_laddr & 0xffff);
 618         SONIC_WRITE(SONIC_REA, lp->rra_end);
 619         SONIC_WRITE(SONIC_RRP, lp->rra_laddr & 0xffff);
 620         SONIC_WRITE(SONIC_RWP, lp->cur_rwp);
 621         SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
 622         SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
 623
 624         /* load the resource pointers */
 625         if (sonic_debug > 3)
 626                 printk("sonic_init: issuing RRRA command\n");
 627
 628         SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
 629         i = 0;
 630         while (i++ < 100) {
 631                 if (SONIC_READ(SONIC_CMD) & SONIC_CR_RRRA)
 632                         break;
 633         }
 634
 635         if (sonic_debug > 2)
 636                 printk("sonic_init: status=%x i=%d\n", SONIC_READ(SONIC_CMD), i);
 637
 638         /*
 639          * Initialize the receive descriptors so that they
 640          * become a circular linked list, ie. let the last
 641          * descriptor point to the first again.
 642          */
 643         if (sonic_debug > 2)
 644                 printk("sonic_init: initialize receive descriptors\n");
 645         for (i=0; i<SONIC_NUM_RDS; i++) {
 646                 sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
 647                 sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
 648                 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
 649                 sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
 650                 sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
 651                 sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
 652                 sonic_rda_put(dev, i, SONIC_RD_LINK,
 653                         lp->rda_laddr +
 654                         ((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
 655         }
 656         /* fix last descriptor */
 657         sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
 658                 (lp->rda_laddr & 0xffff) | SONIC_EOL);
 659         lp->eol_rx = SONIC_NUM_RDS - 1;
 660         lp->cur_rx = 0;
 661         SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
 662         SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
 663
 664         /*
 665          * initialize transmit descriptors
 666          */
 667         if (sonic_debug > 2)
 668                 printk("sonic_init: initialize transmit descriptors\n");
 669         for (i = 0; i < SONIC_NUM_TDS; i++) {
 670                 sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
 671                 sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
 672                 sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
 673                 sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
 674                 sonic_tda_put(dev, i, SONIC_TD_LINK,
 675                         (lp->tda_laddr & 0xffff) +
 676                         (i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
 677                 lp->tx_skb[i] = NULL;
 678         }
 679         /* fix last descriptor */
 680         sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
 681                 (lp->tda_laddr & 0xffff));
 682
 683         SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
 684         SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
 685         lp->cur_tx = lp->next_tx = 0;
 686         lp->eol_tx = SONIC_NUM_TDS - 1;
 687
 688         /*
 689          * put our own address to CAM desc[0]
 690          */
 691         sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
 692         sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
 693         sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
 694         sonic_set_cam_enable(dev, 1);
 695
 696         for (i = 0; i < 16; i++)
 697                 sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
 698
 699         /*
 700          * initialize CAM registers
 701          */
 702         SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
 703         SONIC_WRITE(SONIC_CDC, 16);
 704
 705         /*
 706          * load the CAM
 707          */
 708         SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
 709
 710         i = 0;
 711         while (i++ < 100) {
 712                 if (SONIC_READ(SONIC_ISR) & SONIC_INT_LCD)
 713                         break;
 714         }
 715         if (sonic_debug > 2) {
 716                 printk("sonic_init: CMD=%x, ISR=%x\n, i=%d",
 717                        SONIC_READ(SONIC_CMD), SONIC_READ(SONIC_ISR), i);
 718         }
 719
 720         /*
 721          * enable receiver, disable loopback
 722          * and enable all interrupts
 723          */
 724         SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN | SONIC_CR_STP);
 725         SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
 726         SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
 727         SONIC_WRITE(SONIC_ISR, 0x7fff);
 728         SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
 729
 730         cmd = SONIC_READ(SONIC_CMD);
 731         if ((cmd & SONIC_CR_RXEN) == 0 || (cmd & SONIC_CR_STP) == 0)
 732                 printk(KERN_ERR "sonic_init: failed, status=%x\n", cmd);
 733
 734         if (sonic_debug > 2)
 735                 printk("sonic_init: new status=%x\n",
 736                        SONIC_READ(SONIC_CMD));
 737
 738         return 0;
 739 }
 740
 741 MODULE_LICENSE("GPL");