1// SPDX-License-Identifier: GPL-2.0 2/* 3 * macsonic.c 4 * 5 * (C) 2005 Finn Thain 6 * 7 * Converted to DMA API, converted to unified driver model, made it work as 8 * a module again, and from the mac68k project, introduced more 32-bit cards 9 * and dhd's support for 16-bit cards. 10 * 11 * (C) 1998 Alan Cox 12 * 13 * Debugging Andreas Ehliar, Michael Schmitz 14 * 15 * Based on code 16 * (C) 1996 by Thomas Bogendoerfer (tsbogend@bigbug.franken.de) 17 * 18 * This driver is based on work from Andreas Busse, but most of 19 * the code is rewritten. 20 * 21 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) 22 * 23 * A driver for the Mac onboard Sonic ethernet chip. 24 * 25 * 98/12/21 MSch: judged from tests on Q800, it's basically working, 26 * but eating up both receive and transmit resources 27 * and duplicating packets. Needs more testing. 28 * 29 * 99/01/03 MSch: upgraded to version 0.92 of the core driver, fixed. 30 * 31 * 00/10/31 sammy@oh.verio.com: Updated driver for 2.4 kernels, fixed problems 32 * on centris. 33 */ 34 35#include <linux/kernel.h> 36#include <linux/module.h> 37#include <linux/types.h> 38#include <linux/fcntl.h> 39#include <linux/gfp.h> 40#include <linux/interrupt.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#include <linux/pgtable.h> 55 56#include <asm/io.h> 57#include <asm/hwtest.h> 58#include <asm/dma.h> 59#include <asm/macintosh.h> 60#include <asm/macints.h> 61#include <asm/mac_via.h> 62 63#include "sonic.h" 64 65/* These should basically be bus-size and endian independent (since 66 the SONIC is at least smart enough that it uses the same endianness 67 as the host, unlike certain less enlightened Macintosh NICs) */ 68#define SONIC_READ(reg) (nubus_readw(dev->base_addr + (reg * 4) \ 69 + lp->reg_offset)) 70#define SONIC_WRITE(reg,val) (nubus_writew(val, dev->base_addr + (reg * 4) \ 71 + lp->reg_offset)) 72 73/* For onboard SONIC */ 74#define ONBOARD_SONIC_REGISTERS 0x50F0A000 75#define ONBOARD_SONIC_PROM_BASE 0x50f08000 76 77enum macsonic_type { 78 MACSONIC_DUODOCK, 79 MACSONIC_APPLE, 80 MACSONIC_APPLE16, 81 MACSONIC_DAYNA, 82 MACSONIC_DAYNALINK 83}; 84 85/* For the built-in SONIC in the Duo Dock */ 86#define DUODOCK_SONIC_REGISTERS 0xe10000 87#define DUODOCK_SONIC_PROM_BASE 0xe12000 88 89/* For Apple-style NuBus SONIC */ 90#define APPLE_SONIC_REGISTERS 0 91#define APPLE_SONIC_PROM_BASE 0x40000 92 93/* Daynalink LC SONIC */ 94#define DAYNALINK_PROM_BASE 0x400000 95 96/* For Dayna-style NuBus SONIC (haven't seen one yet) */ 97#define DAYNA_SONIC_REGISTERS 0x180000 98/* This is what OpenBSD says. However, this is definitely in NuBus 99 ROM space so we should be able to get it by walking the NuBus 100 resource directories */ 101#define DAYNA_SONIC_MAC_ADDR 0xffe004 102 103#define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr) 104 105/* 106 * For reversing the PROM address 107 */ 108 109static inline void bit_reverse_addr(unsigned char addr[6]) 110{ 111 int i; 112 113 for(i = 0; i < 6; i++) 114 addr[i] = bitrev8(addr[i]); 115} 116 117static int macsonic_open(struct net_device* dev) 118{ 119 int retval; 120 121 retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); 122 if (retval) { 123 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 124 dev->name, dev->irq); 125 goto err; 126 } 127 /* Under the A/UX interrupt scheme, the onboard SONIC interrupt gets 128 * moved from level 2 to level 3. Unfortunately we still get some 129 * level 2 interrupts so register the handler for both. 130 */ 131 if (dev->irq == IRQ_AUTO_3) { 132 retval = request_irq(IRQ_NUBUS_9, sonic_interrupt, 0, 133 "sonic", dev); 134 if (retval) { 135 printk(KERN_ERR "%s: unable to get IRQ %d.\n", 136 dev->name, IRQ_NUBUS_9); 137 goto err_irq; 138 } 139 } 140 retval = sonic_open(dev); 141 if (retval) 142 goto err_irq_nubus; 143 return 0; 144 145err_irq_nubus: 146 if (dev->irq == IRQ_AUTO_3) 147 free_irq(IRQ_NUBUS_9, dev); 148err_irq: 149 free_irq(dev->irq, dev); 150err: 151 return retval; 152} 153 154static int macsonic_close(struct net_device* dev) 155{ 156 int err; 157 err = sonic_close(dev); 158 free_irq(dev->irq, dev); 159 if (dev->irq == IRQ_AUTO_3) 160 free_irq(IRQ_NUBUS_9, dev); 161 return err; 162} 163 164static const struct net_device_ops macsonic_netdev_ops = { 165 .ndo_open = macsonic_open, 166 .ndo_stop = macsonic_close, 167 .ndo_start_xmit = sonic_send_packet, 168 .ndo_set_rx_mode = sonic_multicast_list, 169 .ndo_tx_timeout = sonic_tx_timeout, 170 .ndo_get_stats = sonic_get_stats, 171 .ndo_validate_addr = eth_validate_addr, 172 .ndo_set_mac_address = eth_mac_addr, 173}; 174 175static int macsonic_init(struct net_device *dev) 176{ 177 struct sonic_local* lp = netdev_priv(dev); 178 int err = sonic_alloc_descriptors(dev); 179 180 if (err) 181 return err; 182 183 dev->netdev_ops = &macsonic_netdev_ops; 184 dev->watchdog_timeo = TX_TIMEOUT; 185 186 /* 187 * clear tally counter 188 */ 189 SONIC_WRITE(SONIC_CRCT, 0xffff); 190 SONIC_WRITE(SONIC_FAET, 0xffff); 191 SONIC_WRITE(SONIC_MPT, 0xffff); 192 193 return 0; 194} 195 196#define INVALID_MAC(mac) (memcmp(mac, "\x08\x00\x07", 3) && \ 197 memcmp(mac, "\x00\xA0\x40", 3) && \ 198 memcmp(mac, "\x00\x80\x19", 3) && \ 199 memcmp(mac, "\x00\x05\x02", 3)) 200 201static void mac_onboard_sonic_ethernet_addr(struct net_device *dev) 202{ 203 struct sonic_local *lp = netdev_priv(dev); 204 const int prom_addr = ONBOARD_SONIC_PROM_BASE; 205 unsigned short val; 206 u8 addr[ETH_ALEN]; 207 208 /* 209 * On NuBus boards we can sometimes look in the ROM resources. 210 * No such luck for comm-slot/onboard. 211 * On the PowerBook 520, the PROM base address is a mystery. 212 */ 213 if (hwreg_present((void *)prom_addr)) { 214 int i; 215 216 for (i = 0; i < 6; i++) 217 addr[i] = SONIC_READ_PROM(i); 218 eth_hw_addr_set(dev, addr); 219 if (!INVALID_MAC(dev->dev_addr)) 220 return; 221 222 /* 223 * Most of the time, the address is bit-reversed. The NetBSD 224 * source has a rather long and detailed historical account of 225 * why this is so. 226 */ 227 bit_reverse_addr(addr); 228 eth_hw_addr_set(dev, addr); 229 if (!INVALID_MAC(dev->dev_addr)) 230 return; 231 232 /* 233 * If we still have what seems to be a bogus address, we'll 234 * look in the CAM. The top entry should be ours. 235 */ 236 printk(KERN_WARNING "macsonic: MAC address in PROM seems " 237 "to be invalid, trying CAM\n"); 238 } else { 239 printk(KERN_WARNING "macsonic: cannot read MAC address from " 240 "PROM, trying CAM\n"); 241 } 242 243 /* This only works if MacOS has already initialized the card. */ 244 245 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); 246 SONIC_WRITE(SONIC_CEP, 15); 247 248 val = SONIC_READ(SONIC_CAP2); 249 addr[5] = val >> 8; 250 addr[4] = val & 0xff; 251 val = SONIC_READ(SONIC_CAP1); 252 addr[3] = val >> 8; 253 addr[2] = val & 0xff; 254 val = SONIC_READ(SONIC_CAP0); 255 addr[1] = val >> 8; 256 addr[0] = val & 0xff; 257 eth_hw_addr_set(dev, addr); 258 259 if (!INVALID_MAC(dev->dev_addr)) 260 return; 261 262 /* Still nonsense ... messed up someplace! */ 263 264 printk(KERN_WARNING "macsonic: MAC address in CAM entry 15 " 265 "seems invalid, will use a random MAC\n"); 266 eth_hw_addr_random(dev); 267} 268 269static int mac_onboard_sonic_probe(struct net_device *dev) 270{ 271 struct sonic_local* lp = netdev_priv(dev); 272 int sr; 273 bool commslot = macintosh_config->expansion_type == MAC_EXP_PDS_COMM; 274 275 /* Bogus probing, on the models which may or may not have 276 Ethernet (BTW, the Ethernet *is* always at the same 277 address, and nothing else lives there, at least if Apple's 278 documentation is to be believed) */ 279 if (commslot || macintosh_config->ident == MAC_MODEL_C610) { 280 int card_present; 281 282 card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS); 283 if (!card_present) { 284 pr_info("Onboard/comm-slot SONIC not found\n"); 285 return -ENODEV; 286 } 287 } 288 289 /* Danger! My arms are flailing wildly! You *must* set lp->reg_offset 290 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */ 291 dev->base_addr = ONBOARD_SONIC_REGISTERS; 292 if (via_alt_mapping) 293 dev->irq = IRQ_AUTO_3; 294 else 295 dev->irq = IRQ_NUBUS_9; 296 297 /* The PowerBook's SONIC is 16 bit always. */ 298 if (macintosh_config->ident == MAC_MODEL_PB520) { 299 lp->reg_offset = 0; 300 lp->dma_bitmode = SONIC_BITMODE16; 301 } else if (commslot) { 302 /* Some of the comm-slot cards are 16 bit. But some 303 of them are not. The 32-bit cards use offset 2 and 304 have known revisions, we try reading the revision 305 register at offset 2, if we don't get a known revision 306 we assume 16 bit at offset 0. */ 307 lp->reg_offset = 2; 308 lp->dma_bitmode = SONIC_BITMODE16; 309 310 sr = SONIC_READ(SONIC_SR); 311 if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101) 312 /* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */ 313 lp->dma_bitmode = SONIC_BITMODE32; 314 else { 315 lp->dma_bitmode = SONIC_BITMODE16; 316 lp->reg_offset = 0; 317 } 318 } else { 319 /* All onboard cards are at offset 2 with 32 bit DMA. */ 320 lp->reg_offset = 2; 321 lp->dma_bitmode = SONIC_BITMODE32; 322 } 323 324 pr_info("Onboard/comm-slot SONIC, revision 0x%04x, %d bit DMA, register offset %d\n", 325 SONIC_READ(SONIC_SR), lp->dma_bitmode ? 32 : 16, 326 lp->reg_offset); 327 328 /* This is sometimes useful to find out how MacOS configured the card */ 329 pr_debug("%s: DCR=0x%04x, DCR2=0x%04x\n", __func__, 330 SONIC_READ(SONIC_DCR) & 0xffff, 331 SONIC_READ(SONIC_DCR2) & 0xffff); 332 333 /* Software reset, then initialize control registers. */ 334 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); 335 336 SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS | 337 SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | 338 (lp->dma_bitmode ? SONIC_DCR_DW : 0)); 339 340 /* This *must* be written back to in order to restore the 341 * extended programmable output bits, as it may not have been 342 * initialised since the hardware reset. */ 343 SONIC_WRITE(SONIC_DCR2, 0); 344 345 /* Clear *and* disable interrupts to be on the safe side */ 346 SONIC_WRITE(SONIC_IMR, 0); 347 SONIC_WRITE(SONIC_ISR, 0x7fff); 348 349 /* Now look for the MAC address. */ 350 mac_onboard_sonic_ethernet_addr(dev); 351 352 pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", 353 dev->base_addr, dev->dev_addr, dev->irq); 354 355 /* Shared init code */ 356 return macsonic_init(dev); 357} 358 359static int mac_sonic_nubus_ethernet_addr(struct net_device *dev, 360 unsigned long prom_addr, int id) 361{ 362 u8 addr[ETH_ALEN]; 363 int i; 364 365 for(i = 0; i < 6; i++) 366 addr[i] = SONIC_READ_PROM(i); 367 368 /* Some of the addresses are bit-reversed */ 369 if (id != MACSONIC_DAYNA) 370 bit_reverse_addr(addr); 371 eth_hw_addr_set(dev, addr); 372 373 return 0; 374} 375 376static int macsonic_ident(struct nubus_rsrc *fres) 377{ 378 if (fres->dr_hw == NUBUS_DRHW_ASANTE_LC && 379 fres->dr_sw == NUBUS_DRSW_SONIC_LC) 380 return MACSONIC_DAYNALINK; 381 if (fres->dr_hw == NUBUS_DRHW_SONIC && 382 fres->dr_sw == NUBUS_DRSW_APPLE) { 383 /* There has to be a better way to do this... */ 384 if (strstr(fres->board->name, "DuoDock")) 385 return MACSONIC_DUODOCK; 386 else 387 return MACSONIC_APPLE; 388 } 389 390 if (fres->dr_hw == NUBUS_DRHW_SMC9194 && 391 fres->dr_sw == NUBUS_DRSW_DAYNA) 392 return MACSONIC_DAYNA; 393 394 if (fres->dr_hw == NUBUS_DRHW_APPLE_SONIC_LC && 395 fres->dr_sw == 0) { /* huh? */ 396 return MACSONIC_APPLE16; 397 } 398 return -1; 399} 400 401static int mac_sonic_nubus_probe_board(struct nubus_board *board, int id, 402 struct net_device *dev) 403{ 404 struct sonic_local* lp = netdev_priv(dev); 405 unsigned long base_addr, prom_addr; 406 u16 sonic_dcr; 407 int reg_offset, dma_bitmode; 408 409 switch (id) { 410 case MACSONIC_DUODOCK: 411 base_addr = board->slot_addr + DUODOCK_SONIC_REGISTERS; 412 prom_addr = board->slot_addr + DUODOCK_SONIC_PROM_BASE; 413 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 | 414 SONIC_DCR_TFT0; 415 reg_offset = 2; 416 dma_bitmode = SONIC_BITMODE32; 417 break; 418 case MACSONIC_APPLE: 419 base_addr = board->slot_addr + APPLE_SONIC_REGISTERS; 420 prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE; 421 sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0; 422 reg_offset = 0; 423 dma_bitmode = SONIC_BITMODE32; 424 break; 425 case MACSONIC_APPLE16: 426 base_addr = board->slot_addr + APPLE_SONIC_REGISTERS; 427 prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE; 428 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | 429 SONIC_DCR_PO1 | SONIC_DCR_BMS; 430 reg_offset = 0; 431 dma_bitmode = SONIC_BITMODE16; 432 break; 433 case MACSONIC_DAYNALINK: 434 base_addr = board->slot_addr + APPLE_SONIC_REGISTERS; 435 prom_addr = board->slot_addr + DAYNALINK_PROM_BASE; 436 sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | 437 SONIC_DCR_PO1 | SONIC_DCR_BMS; 438 reg_offset = 0; 439 dma_bitmode = SONIC_BITMODE16; 440 break; 441 case MACSONIC_DAYNA: 442 base_addr = board->slot_addr + DAYNA_SONIC_REGISTERS; 443 prom_addr = board->slot_addr + DAYNA_SONIC_MAC_ADDR; 444 sonic_dcr = SONIC_DCR_BMS | 445 SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1; 446 reg_offset = 0; 447 dma_bitmode = SONIC_BITMODE16; 448 break; 449 default: 450 printk(KERN_ERR "macsonic: WTF, id is %d\n", id); 451 return -ENODEV; 452 } 453 454 /* Danger! My arms are flailing wildly! You *must* set lp->reg_offset 455 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */ 456 dev->base_addr = base_addr; 457 lp->reg_offset = reg_offset; 458 lp->dma_bitmode = dma_bitmode; 459 dev->irq = SLOT2IRQ(board->slot); 460 461 dev_info(&board->dev, "%s, revision 0x%04x, %d bit DMA, register offset %d\n", 462 board->name, SONIC_READ(SONIC_SR), 463 lp->dma_bitmode ? 32 : 16, lp->reg_offset); 464 465 /* This is sometimes useful to find out how MacOS configured the card */ 466 dev_dbg(&board->dev, "%s: DCR=0x%04x, DCR2=0x%04x\n", __func__, 467 SONIC_READ(SONIC_DCR) & 0xffff, 468 SONIC_READ(SONIC_DCR2) & 0xffff); 469 470 /* Software reset, then initialize control registers. */ 471 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST); 472 SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0)); 473 /* This *must* be written back to in order to restore the 474 * extended programmable output bits, since it may not have been 475 * initialised since the hardware reset. */ 476 SONIC_WRITE(SONIC_DCR2, 0); 477 478 /* Clear *and* disable interrupts to be on the safe side */ 479 SONIC_WRITE(SONIC_IMR, 0); 480 SONIC_WRITE(SONIC_ISR, 0x7fff); 481 482 /* Now look for the MAC address. */ 483 if (mac_sonic_nubus_ethernet_addr(dev, prom_addr, id) != 0) 484 return -ENODEV; 485 486 dev_info(&board->dev, "SONIC ethernet @%08lx, MAC %pM, IRQ %d\n", 487 dev->base_addr, dev->dev_addr, dev->irq); 488 489 /* Shared init code */ 490 return macsonic_init(dev); 491} 492 493static int mac_sonic_platform_probe(struct platform_device *pdev) 494{ 495 struct net_device *dev; 496 struct sonic_local *lp; 497 int err; 498 499 dev = alloc_etherdev(sizeof(struct sonic_local)); 500 if (!dev) 501 return -ENOMEM; 502 503 lp = netdev_priv(dev); 504 lp->device = &pdev->dev; 505 SET_NETDEV_DEV(dev, &pdev->dev); 506 platform_set_drvdata(pdev, dev); 507 508 err = mac_onboard_sonic_probe(dev); 509 if (err) 510 goto out; 511 512 sonic_msg_init(dev); 513 514 err = register_netdev(dev); 515 if (err) 516 goto undo_probe; 517 518 return 0; 519 520undo_probe: 521 dma_free_coherent(lp->device, 522 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 523 lp->descriptors, lp->descriptors_laddr); 524out: 525 free_netdev(dev); 526 527 return err; 528} 529 530MODULE_DESCRIPTION("Macintosh SONIC ethernet driver"); 531MODULE_ALIAS("platform:macsonic"); 532 533#include "sonic.c" 534 535static void mac_sonic_platform_remove(struct platform_device *pdev) 536{ 537 struct net_device *dev = platform_get_drvdata(pdev); 538 struct sonic_local* lp = netdev_priv(dev); 539 540 unregister_netdev(dev); 541 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 542 lp->descriptors, lp->descriptors_laddr); 543 free_netdev(dev); 544} 545 546static struct platform_driver mac_sonic_platform_driver = { 547 .probe = mac_sonic_platform_probe, 548 .remove_new = mac_sonic_platform_remove, 549 .driver = { 550 .name = "macsonic", 551 }, 552}; 553 554static int mac_sonic_nubus_probe(struct nubus_board *board) 555{ 556 struct net_device *ndev; 557 struct sonic_local *lp; 558 struct nubus_rsrc *fres; 559 int id = -1; 560 int err; 561 562 /* The platform driver will handle a PDS or Comm Slot card (even if 563 * it has a pseudoslot declaration ROM). 564 */ 565 if (macintosh_config->expansion_type == MAC_EXP_PDS_COMM) 566 return -ENODEV; 567 568 for_each_board_func_rsrc(board, fres) { 569 if (fres->category != NUBUS_CAT_NETWORK || 570 fres->type != NUBUS_TYPE_ETHERNET) 571 continue; 572 573 id = macsonic_ident(fres); 574 if (id != -1) 575 break; 576 } 577 if (!fres) 578 return -ENODEV; 579 580 ndev = alloc_etherdev(sizeof(struct sonic_local)); 581 if (!ndev) 582 return -ENOMEM; 583 584 lp = netdev_priv(ndev); 585 lp->device = &board->dev; 586 SET_NETDEV_DEV(ndev, &board->dev); 587 588 err = mac_sonic_nubus_probe_board(board, id, ndev); 589 if (err) 590 goto out; 591 592 sonic_msg_init(ndev); 593 594 err = register_netdev(ndev); 595 if (err) 596 goto undo_probe; 597 598 nubus_set_drvdata(board, ndev); 599 600 return 0; 601 602undo_probe: 603 dma_free_coherent(lp->device, 604 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 605 lp->descriptors, lp->descriptors_laddr); 606out: 607 free_netdev(ndev); 608 return err; 609} 610 611static void mac_sonic_nubus_remove(struct nubus_board *board) 612{ 613 struct net_device *ndev = nubus_get_drvdata(board); 614 struct sonic_local *lp = netdev_priv(ndev); 615 616 unregister_netdev(ndev); 617 dma_free_coherent(lp->device, 618 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), 619 lp->descriptors, lp->descriptors_laddr); 620 free_netdev(ndev); 621} 622 623static struct nubus_driver mac_sonic_nubus_driver = { 624 .probe = mac_sonic_nubus_probe, 625 .remove = mac_sonic_nubus_remove, 626 .driver = { 627 .name = "macsonic-nubus", 628 .owner = THIS_MODULE, 629 }, 630}; 631 632static int perr, nerr; 633 634static int __init mac_sonic_init(void) 635{ 636 perr = platform_driver_register(&mac_sonic_platform_driver); 637 nerr = nubus_driver_register(&mac_sonic_nubus_driver); 638 return 0; 639} 640module_init(mac_sonic_init); 641 642static void __exit mac_sonic_exit(void) 643{ 644 if (!perr) 645 platform_driver_unregister(&mac_sonic_platform_driver); 646 if (!nerr) 647 nubus_driver_unregister(&mac_sonic_nubus_driver); 648} 649module_exit(mac_sonic_exit); 650