drivers/net/ethernet/natsemi/macsonic.c

   1 /*
   2  * macsonic.c
   3  *
   4  * (C) 2005 Finn Thain
   5  *
   6  * Converted to DMA API, converted to unified driver model, made it work as
   7  * a module again, and from the mac68k project, introduced more 32-bit cards
   8  * and dhd's support for 16-bit cards.
   9  *
  10  * (C) 1998 Alan Cox
  11  *
  12  * Debugging Andreas Ehliar, Michael Schmitz
  13  *
  14  * Based on code
  15  * (C) 1996 by Thomas Bogendoerfer (tsbogend@bigbug.franken.de)
  16  *
  17  * This driver is based on work from Andreas Busse, but most of
  18  * the code is rewritten.
  19  *
  20  * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
  21  *
  22  * A driver for the Mac onboard Sonic ethernet chip.
  23  *
  24  * 98/12/21 MSch: judged from tests on Q800, it's basically working,
  25  *                but eating up both receive and transmit resources
  26  *                and duplicating packets. Needs more testing.
  27  *
  28  * 99/01/03 MSch: upgraded to version 0.92 of the core driver, fixed.
  29  *
  30  * 00/10/31 sammy@oh.verio.com: Updated driver for 2.4 kernels, fixed problems
  31  *          on centris.
  32  */
  33
  34 #include <linux/kernel.h>
  35 #include <linux/module.h>
  36 #include <linux/types.h>
  37 #include <linux/fcntl.h>
  38 #include <linux/gfp.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/init.h>
  41 #include <linux/ioport.h>
  42 #include <linux/in.h>
  43 #include <linux/string.h>
  44 #include <linux/delay.h>
  45 #include <linux/nubus.h>
  46 #include <linux/errno.h>
  47 #include <linux/netdevice.h>
  48 #include <linux/etherdevice.h>
  49 #include <linux/skbuff.h>
  50 #include <linux/platform_device.h>
  51 #include <linux/dma-mapping.h>
  52 #include <linux/bitrev.h>
  53 #include <linux/slab.h>
  54
  55 #include <asm/bootinfo.h>
  56 #include <asm/system.h>
  57 #include <asm/pgtable.h>
  58 #include <asm/io.h>
  59 #include <asm/hwtest.h>
  60 #include <asm/dma.h>
  61 #include <asm/macintosh.h>
  62 #include <asm/macints.h>
  63 #include <asm/mac_via.h>
  64
  65 static char mac_sonic_string[] = "macsonic";
  66
  67 #include "sonic.h"
  68
  69 /* These should basically be bus-size and endian independent (since
  70    the SONIC is at least smart enough that it uses the same endianness
  71    as the host, unlike certain less enlightened Macintosh NICs) */
  72 #define SONIC_READ(reg) (nubus_readw(dev->base_addr + (reg * 4) \
  73               + lp->reg_offset))
  74 #define SONIC_WRITE(reg,val) (nubus_writew(val, dev->base_addr + (reg * 4) \
  75               + lp->reg_offset))
  76
  77 /* use 0 for production, 1 for verification, >1 for debug */
  78 #ifdef SONIC_DEBUG
  79 static unsigned int sonic_debug = SONIC_DEBUG;
  80 #else
  81 static unsigned int sonic_debug = 1;
  82 #endif
  83
  84 static int sonic_version_printed;
  85
  86 /* For onboard SONIC */
  87 #define ONBOARD_SONIC_REGISTERS 0x50F0A000
  88 #define ONBOARD_SONIC_PROM_BASE 0x50f08000
  89
  90 enum macsonic_type {
  91         MACSONIC_DUODOCK,
  92         MACSONIC_APPLE,
  93         MACSONIC_APPLE16,
  94         MACSONIC_DAYNA,
  95         MACSONIC_DAYNALINK
  96 };
  97
  98 /* For the built-in SONIC in the Duo Dock */
  99 #define DUODOCK_SONIC_REGISTERS 0xe10000
 100 #define DUODOCK_SONIC_PROM_BASE 0xe12000
 101
 102 /* For Apple-style NuBus SONIC */
 103 #define APPLE_SONIC_REGISTERS   0
 104 #define APPLE_SONIC_PROM_BASE   0x40000
 105
 106 /* Daynalink LC SONIC */
 107 #define DAYNALINK_PROM_BASE 0x400000
 108
 109 /* For Dayna-style NuBus SONIC (haven't seen one yet) */
 110 #define DAYNA_SONIC_REGISTERS   0x180000
 111 /* This is what OpenBSD says.  However, this is definitely in NuBus
 112    ROM space so we should be able to get it by walking the NuBus
 113    resource directories */
 114 #define DAYNA_SONIC_MAC_ADDR    0xffe004
 115
 116 #define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr)
 117
 118 /*
 119  * For reversing the PROM address
 120  */
 121
 122 static inline void bit_reverse_addr(unsigned char addr[6])
 123 {
 124         int i;
 125
 126         for(i = 0; i < 6; i++)
 127                 addr[i] = bitrev8(addr[i]);
 128 }
 129
 130 static irqreturn_t macsonic_interrupt(int irq, void *dev_id)
 131 {
 132         irqreturn_t result;
 133         unsigned long flags;
 134
 135         local_irq_save(flags);
 136         result = sonic_interrupt(irq, dev_id);
 137         local_irq_restore(flags);
 138         return result;
 139 }
 140
 141 static int macsonic_open(struct net_device* dev)
 142 {
 143         int retval;
 144
 145         retval = request_irq(dev->irq, sonic_interrupt, IRQ_FLG_FAST,
 146                                 "sonic", dev);
 147         if (retval) {
 148                 printk(KERN_ERR "%s: unable to get IRQ %d.\n",
 149                                 dev->name, dev->irq);
 150                 goto err;
 151         }
 152         /* Under the A/UX interrupt scheme, the onboard SONIC interrupt comes
 153          * in at priority level 3. However, we sometimes get the level 2 inter-
 154          * rupt as well, which must prevent re-entrance of the sonic handler.
 155          */
 156         if (dev->irq == IRQ_AUTO_3) {
 157                 retval = request_irq(IRQ_NUBUS_9, macsonic_interrupt,
 158                                         IRQ_FLG_FAST, "sonic", dev);
 159                 if (retval) {
 160                         printk(KERN_ERR "%s: unable to get IRQ %d.\n",
 161                                         dev->name, IRQ_NUBUS_9);
 162                         goto err_irq;
 163                 }
 164         }
 165         retval = sonic_open(dev);
 166         if (retval)
 167                 goto err_irq_nubus;
 168         return 0;
 169
 170 err_irq_nubus:
 171         if (dev->irq == IRQ_AUTO_3)
 172                 free_irq(IRQ_NUBUS_9, dev);
 173 err_irq:
 174         free_irq(dev->irq, dev);
 175 err:
 176         return retval;
 177 }
 178
 179 static int macsonic_close(struct net_device* dev)
 180 {
 181         int err;
 182         err = sonic_close(dev);
 183         free_irq(dev->irq, dev);
 184         if (dev->irq == IRQ_AUTO_3)
 185                 free_irq(IRQ_NUBUS_9, dev);
 186         return err;
 187 }
 188
 189 static const struct net_device_ops macsonic_netdev_ops = {
 190         .ndo_open               = macsonic_open,
 191         .ndo_stop               = macsonic_close,
 192         .ndo_start_xmit         = sonic_send_packet,
 193         .ndo_set_rx_mode        = sonic_multicast_list,
 194         .ndo_tx_timeout         = sonic_tx_timeout,
 195         .ndo_get_stats          = sonic_get_stats,
 196         .ndo_validate_addr      = eth_validate_addr,
 197         .ndo_change_mtu         = eth_change_mtu,
 198         .ndo_set_mac_address    = eth_mac_addr,
 199 };
 200
 201 static int __devinit macsonic_init(struct net_device *dev)
 202 {
 203         struct sonic_local* lp = netdev_priv(dev);
 204
 205         /* Allocate the entire chunk of memory for the descriptors.
 206            Note that this cannot cross a 64K boundary. */
 207         if ((lp->descriptors = dma_alloc_coherent(lp->device,
 208                     SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 209                     &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
 210                 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n",
 211                        dev_name(lp->device));
 212                 return -ENOMEM;
 213         }
 214
 215         /* Now set up the pointers to point to the appropriate places */
 216         lp->cda = lp->descriptors;
 217         lp->tda = lp->cda + (SIZEOF_SONIC_CDA
 218                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 219         lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 220                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 221         lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 222                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 223
 224         lp->cda_laddr = lp->descriptors_laddr;
 225         lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
 226                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 227         lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
 228                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 229         lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
 230                              * SONIC_BUS_SCALE(lp->dma_bitmode));
 231
 232         dev->netdev_ops = &macsonic_netdev_ops;
 233         dev->watchdog_timeo = TX_TIMEOUT;
 234
 235         /*
 236          * clear tally counter
 237          */
 238         SONIC_WRITE(SONIC_CRCT, 0xffff);
 239         SONIC_WRITE(SONIC_FAET, 0xffff);
 240         SONIC_WRITE(SONIC_MPT, 0xffff);
 241
 242         return 0;
 243 }
 244
 245 #define INVALID_MAC(mac) (memcmp(mac, "\x08\x00\x07", 3) && \
 246                           memcmp(mac, "\x00\xA0\x40", 3) && \
 247                           memcmp(mac, "\x00\x80\x19", 3) && \
 248                           memcmp(mac, "\x00\x05\x02", 3))
 249
 250 static void __devinit mac_onboard_sonic_ethernet_addr(struct net_device *dev)
 251 {
 252         struct sonic_local *lp = netdev_priv(dev);
 253         const int prom_addr = ONBOARD_SONIC_PROM_BASE;
 254         unsigned short val;
 255
 256         /*
 257          * On NuBus boards we can sometimes look in the ROM resources.
 258          * No such luck for comm-slot/onboard.
 259          * On the PowerBook 520, the PROM base address is a mystery.
 260          */
 261         if (hwreg_present((void *)prom_addr)) {
 262                 int i;
 263
 264                 for (i = 0; i < 6; i++)
 265                         dev->dev_addr[i] = SONIC_READ_PROM(i);
 266                 if (!INVALID_MAC(dev->dev_addr))
 267                         return;
 268
 269                 /*
 270                  * Most of the time, the address is bit-reversed. The NetBSD
 271                  * source has a rather long and detailed historical account of
 272                  * why this is so.
 273                  */
 274                 bit_reverse_addr(dev->dev_addr);
 275                 if (!INVALID_MAC(dev->dev_addr))
 276                         return;
 277
 278                 /*
 279                  * If we still have what seems to be a bogus address, we'll
 280                  * look in the CAM. The top entry should be ours.
 281                  */
 282                 printk(KERN_WARNING "macsonic: MAC address in PROM seems "
 283                                     "to be invalid, trying CAM\n");
 284         } else {
 285                 printk(KERN_WARNING "macsonic: cannot read MAC address from "
 286                                     "PROM, trying CAM\n");
 287         }
 288
 289         /* This only works if MacOS has already initialized the card. */
 290
 291         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 292         SONIC_WRITE(SONIC_CEP, 15);
 293
 294         val = SONIC_READ(SONIC_CAP2);
 295         dev->dev_addr[5] = val >> 8;
 296         dev->dev_addr[4] = val & 0xff;
 297         val = SONIC_READ(SONIC_CAP1);
 298         dev->dev_addr[3] = val >> 8;
 299         dev->dev_addr[2] = val & 0xff;
 300         val = SONIC_READ(SONIC_CAP0);
 301         dev->dev_addr[1] = val >> 8;
 302         dev->dev_addr[0] = val & 0xff;
 303
 304         if (!INVALID_MAC(dev->dev_addr))
 305                 return;
 306
 307         /* Still nonsense ... messed up someplace! */
 308
 309         printk(KERN_WARNING "macsonic: MAC address in CAM entry 15 "
 310                             "seems invalid, will use a random MAC\n");
 311         random_ether_addr(dev->dev_addr);
 312 }
 313
 314 static int __devinit mac_onboard_sonic_probe(struct net_device *dev)
 315 {
 316         struct sonic_local* lp = netdev_priv(dev);
 317         int sr;
 318         int commslot = 0;
 319
 320         if (!MACH_IS_MAC)
 321                 return -ENODEV;
 322
 323         printk(KERN_INFO "Checking for internal Macintosh ethernet (SONIC).. ");
 324
 325         /* Bogus probing, on the models which may or may not have
 326            Ethernet (BTW, the Ethernet *is* always at the same
 327            address, and nothing else lives there, at least if Apple's
 328            documentation is to be believed) */
 329         if (macintosh_config->ident == MAC_MODEL_Q630 ||
 330             macintosh_config->ident == MAC_MODEL_P588 ||
 331             macintosh_config->ident == MAC_MODEL_P575 ||
 332             macintosh_config->ident == MAC_MODEL_C610) {
 333                 unsigned long flags;
 334                 int card_present;
 335
 336                 local_irq_save(flags);
 337                 card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS);
 338                 local_irq_restore(flags);
 339
 340                 if (!card_present) {
 341                         printk("none.\n");
 342                         return -ENODEV;
 343                 }
 344                 commslot = 1;
 345         }
 346
 347         printk("yes\n");
 348
 349         /* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
 350          * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
 351         dev->base_addr = ONBOARD_SONIC_REGISTERS;
 352         if (via_alt_mapping)
 353                 dev->irq = IRQ_AUTO_3;
 354         else
 355                 dev->irq = IRQ_NUBUS_9;
 356
 357         if (!sonic_version_printed) {
 358                 printk(KERN_INFO "%s", version);
 359                 sonic_version_printed = 1;
 360         }
 361         printk(KERN_INFO "%s: onboard / comm-slot SONIC at 0x%08lx\n",
 362                dev_name(lp->device), dev->base_addr);
 363
 364         /* The PowerBook's SONIC is 16 bit always. */
 365         if (macintosh_config->ident == MAC_MODEL_PB520) {
 366                 lp->reg_offset = 0;
 367                 lp->dma_bitmode = SONIC_BITMODE16;
 368                 sr = SONIC_READ(SONIC_SR);
 369         } else if (commslot) {
 370                 /* Some of the comm-slot cards are 16 bit.  But some
 371                    of them are not.  The 32-bit cards use offset 2 and
 372                    have known revisions, we try reading the revision
 373                    register at offset 2, if we don't get a known revision
 374                    we assume 16 bit at offset 0.  */
 375                 lp->reg_offset = 2;
 376                 lp->dma_bitmode = SONIC_BITMODE16;
 377
 378                 sr = SONIC_READ(SONIC_SR);
 379                 if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101)
 380                         /* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */
 381                         lp->dma_bitmode = SONIC_BITMODE32;
 382                 else {
 383                         lp->dma_bitmode = SONIC_BITMODE16;
 384                         lp->reg_offset = 0;
 385                         sr = SONIC_READ(SONIC_SR);
 386                 }
 387         } else {
 388                 /* All onboard cards are at offset 2 with 32 bit DMA. */
 389                 lp->reg_offset = 2;
 390                 lp->dma_bitmode = SONIC_BITMODE32;
 391                 sr = SONIC_READ(SONIC_SR);
 392         }
 393         printk(KERN_INFO
 394                "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
 395                dev_name(lp->device), sr, lp->dma_bitmode?32:16, lp->reg_offset);
 396
 397 #if 0 /* This is sometimes useful to find out how MacOS configured the card. */
 398         printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", dev_name(lp->device),
 399                SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
 400 #endif
 401
 402         /* Software reset, then initialize control registers. */
 403         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 404
 405         SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS |
 406                                SONIC_DCR_RFT1  | SONIC_DCR_TFT0 |
 407                                (lp->dma_bitmode ? SONIC_DCR_DW : 0));
 408
 409         /* This *must* be written back to in order to restore the
 410          * extended programmable output bits, as it may not have been
 411          * initialised since the hardware reset. */
 412         SONIC_WRITE(SONIC_DCR2, 0);
 413
 414         /* Clear *and* disable interrupts to be on the safe side */
 415         SONIC_WRITE(SONIC_IMR, 0);
 416         SONIC_WRITE(SONIC_ISR, 0x7fff);
 417
 418         /* Now look for the MAC address. */
 419         mac_onboard_sonic_ethernet_addr(dev);
 420
 421         /* Shared init code */
 422         return macsonic_init(dev);
 423 }
 424
 425 static int __devinit mac_nubus_sonic_ethernet_addr(struct net_device *dev,
 426                                                 unsigned long prom_addr,
 427                                                 int id)
 428 {
 429         int i;
 430         for(i = 0; i < 6; i++)
 431                 dev->dev_addr[i] = SONIC_READ_PROM(i);
 432
 433         /* Some of the addresses are bit-reversed */
 434         if (id != MACSONIC_DAYNA)
 435                 bit_reverse_addr(dev->dev_addr);
 436
 437         return 0;
 438 }
 439
 440 static int __devinit macsonic_ident(struct nubus_dev *ndev)
 441 {
 442         if (ndev->dr_hw == NUBUS_DRHW_ASANTE_LC &&
 443             ndev->dr_sw == NUBUS_DRSW_SONIC_LC)
 444                 return MACSONIC_DAYNALINK;
 445         if (ndev->dr_hw == NUBUS_DRHW_SONIC &&
 446             ndev->dr_sw == NUBUS_DRSW_APPLE) {
 447                 /* There has to be a better way to do this... */
 448                 if (strstr(ndev->board->name, "DuoDock"))
 449                         return MACSONIC_DUODOCK;
 450                 else
 451                         return MACSONIC_APPLE;
 452         }
 453
 454         if (ndev->dr_hw == NUBUS_DRHW_SMC9194 &&
 455             ndev->dr_sw == NUBUS_DRSW_DAYNA)
 456                 return MACSONIC_DAYNA;
 457
 458         if (ndev->dr_hw == NUBUS_DRHW_APPLE_SONIC_LC &&
 459             ndev->dr_sw == 0) { /* huh? */
 460                 return MACSONIC_APPLE16;
 461         }
 462         return -1;
 463 }
 464
 465 static int __devinit mac_nubus_sonic_probe(struct net_device *dev)
 466 {
 467         static int slots;
 468         struct nubus_dev* ndev = NULL;
 469         struct sonic_local* lp = netdev_priv(dev);
 470         unsigned long base_addr, prom_addr;
 471         u16 sonic_dcr;
 472         int id = -1;
 473         int reg_offset, dma_bitmode;
 474
 475         /* Find the first SONIC that hasn't been initialized already */
 476         while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK,
 477                                        NUBUS_TYPE_ETHERNET, ndev)) != NULL)
 478         {
 479                 /* Have we seen it already? */
 480                 if (slots & (1<<ndev->board->slot))
 481                         continue;
 482                 slots |= 1<<ndev->board->slot;
 483
 484                 /* Is it one of ours? */
 485                 if ((id = macsonic_ident(ndev)) != -1)
 486                         break;
 487         }
 488
 489         if (ndev == NULL)
 490                 return -ENODEV;
 491
 492         switch (id) {
 493         case MACSONIC_DUODOCK:
 494                 base_addr = ndev->board->slot_addr + DUODOCK_SONIC_REGISTERS;
 495                 prom_addr = ndev->board->slot_addr + DUODOCK_SONIC_PROM_BASE;
 496                 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 |
 497                             SONIC_DCR_TFT0;
 498                 reg_offset = 2;
 499                 dma_bitmode = SONIC_BITMODE32;
 500                 break;
 501         case MACSONIC_APPLE:
 502                 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 503                 prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
 504                 sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
 505                 reg_offset = 0;
 506                 dma_bitmode = SONIC_BITMODE32;
 507                 break;
 508         case MACSONIC_APPLE16:
 509                 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 510                 prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
 511                 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
 512                             SONIC_DCR_PO1 | SONIC_DCR_BMS;
 513                 reg_offset = 0;
 514                 dma_bitmode = SONIC_BITMODE16;
 515                 break;
 516         case MACSONIC_DAYNALINK:
 517                 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
 518                 prom_addr = ndev->board->slot_addr + DAYNALINK_PROM_BASE;
 519                 sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
 520                             SONIC_DCR_PO1 | SONIC_DCR_BMS;
 521                 reg_offset = 0;
 522                 dma_bitmode = SONIC_BITMODE16;
 523                 break;
 524         case MACSONIC_DAYNA:
 525                 base_addr = ndev->board->slot_addr + DAYNA_SONIC_REGISTERS;
 526                 prom_addr = ndev->board->slot_addr + DAYNA_SONIC_MAC_ADDR;
 527                 sonic_dcr = SONIC_DCR_BMS |
 528                             SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
 529                 reg_offset = 0;
 530                 dma_bitmode = SONIC_BITMODE16;
 531                 break;
 532         default:
 533                 printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
 534                 return -ENODEV;
 535         }
 536
 537         /* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
 538          * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
 539         dev->base_addr = base_addr;
 540         lp->reg_offset = reg_offset;
 541         lp->dma_bitmode = dma_bitmode;
 542         dev->irq = SLOT2IRQ(ndev->board->slot);
 543
 544         if (!sonic_version_printed) {
 545                 printk(KERN_INFO "%s", version);
 546                 sonic_version_printed = 1;
 547         }
 548         printk(KERN_INFO "%s: %s in slot %X\n",
 549                dev_name(lp->device), ndev->board->name, ndev->board->slot);
 550         printk(KERN_INFO "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
 551                dev_name(lp->device), SONIC_READ(SONIC_SR), dma_bitmode?32:16, reg_offset);
 552
 553 #if 0 /* This is sometimes useful to find out how MacOS configured the card. */
 554         printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", dev_name(lp->device),
 555                SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
 556 #endif
 557
 558         /* Software reset, then initialize control registers. */
 559         SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
 560         SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0));
 561         /* This *must* be written back to in order to restore the
 562          * extended programmable output bits, since it may not have been
 563          * initialised since the hardware reset. */
 564         SONIC_WRITE(SONIC_DCR2, 0);
 565
 566         /* Clear *and* disable interrupts to be on the safe side */
 567         SONIC_WRITE(SONIC_IMR, 0);
 568         SONIC_WRITE(SONIC_ISR, 0x7fff);
 569
 570         /* Now look for the MAC address. */
 571         if (mac_nubus_sonic_ethernet_addr(dev, prom_addr, id) != 0)
 572                 return -ENODEV;
 573
 574         /* Shared init code */
 575         return macsonic_init(dev);
 576 }
 577
 578 static int __devinit mac_sonic_probe(struct platform_device *pdev)
 579 {
 580         struct net_device *dev;
 581         struct sonic_local *lp;
 582         int err;
 583
 584         dev = alloc_etherdev(sizeof(struct sonic_local));
 585         if (!dev)
 586                 return -ENOMEM;
 587
 588         lp = netdev_priv(dev);
 589         lp->device = &pdev->dev;
 590         SET_NETDEV_DEV(dev, &pdev->dev);
 591         platform_set_drvdata(pdev, dev);
 592
 593         /* This will catch fatal stuff like -ENOMEM as well as success */
 594         err = mac_onboard_sonic_probe(dev);
 595         if (err == 0)
 596                 goto found;
 597         if (err != -ENODEV)
 598                 goto out;
 599         err = mac_nubus_sonic_probe(dev);
 600         if (err)
 601                 goto out;
 602 found:
 603         err = register_netdev(dev);
 604         if (err)
 605                 goto out;
 606
 607         printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq);
 608
 609         return 0;
 610
 611 out:
 612         free_netdev(dev);
 613
 614         return err;
 615 }
 616
 617 MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
 618 module_param(sonic_debug, int, 0);
 619 MODULE_PARM_DESC(sonic_debug, "macsonic debug level (1-4)");
 620 MODULE_ALIAS("platform:macsonic");
 621
 622 #include "sonic.c"
 623
 624 static int __devexit mac_sonic_device_remove (struct platform_device *pdev)
 625 {
 626         struct net_device *dev = platform_get_drvdata(pdev);
 627         struct sonic_local* lp = netdev_priv(dev);
 628
 629         unregister_netdev(dev);
 630         dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
 631                           lp->descriptors, lp->descriptors_laddr);
 632         free_netdev(dev);
 633
 634         return 0;
 635 }
 636
 637 static struct platform_driver mac_sonic_driver = {
 638         .probe  = mac_sonic_probe,
 639         .remove = __devexit_p(mac_sonic_device_remove),
 640         .driver = {
 641                 .name   = mac_sonic_string,
 642                 .owner  = THIS_MODULE,
 643         },
 644 };
 645
 646 static int __init mac_sonic_init_module(void)
 647 {
 648         return platform_driver_register(&mac_sonic_driver);
 649 }
 650
 651 static void __exit mac_sonic_cleanup_module(void)
 652 {
 653         platform_driver_unregister(&mac_sonic_driver);
 654 }
 655
 656 module_init(mac_sonic_init_module);
 657 module_exit(mac_sonic_cleanup_module);