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/drivers/net/ethernet/natsemi/macsonic.c

http://github.com/mirrors/linux
C | 638 lines | 430 code | 101 blank | 107 comment | 75 complexity | e5dce86b58ab9a19a858a42d63e60101 MD5 | raw file
  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
 55#include <asm/pgtable.h>
 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
207	/*
208	 * On NuBus boards we can sometimes look in the ROM resources.
209	 * No such luck for comm-slot/onboard.
210	 * On the PowerBook 520, the PROM base address is a mystery.
211	 */
212	if (hwreg_present((void *)prom_addr)) {
213		int i;
214
215		for (i = 0; i < 6; i++)
216			dev->dev_addr[i] = SONIC_READ_PROM(i);
217		if (!INVALID_MAC(dev->dev_addr))
218			return;
219
220		/*
221		 * Most of the time, the address is bit-reversed. The NetBSD
222		 * source has a rather long and detailed historical account of
223		 * why this is so.
224		 */
225		bit_reverse_addr(dev->dev_addr);
226		if (!INVALID_MAC(dev->dev_addr))
227			return;
228
229		/*
230		 * If we still have what seems to be a bogus address, we'll
231		 * look in the CAM. The top entry should be ours.
232		 */
233		printk(KERN_WARNING "macsonic: MAC address in PROM seems "
234		                    "to be invalid, trying CAM\n");
235	} else {
236		printk(KERN_WARNING "macsonic: cannot read MAC address from "
237		                    "PROM, trying CAM\n");
238	}
239
240	/* This only works if MacOS has already initialized the card. */
241
242	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
243	SONIC_WRITE(SONIC_CEP, 15);
244
245	val = SONIC_READ(SONIC_CAP2);
246	dev->dev_addr[5] = val >> 8;
247	dev->dev_addr[4] = val & 0xff;
248	val = SONIC_READ(SONIC_CAP1);
249	dev->dev_addr[3] = val >> 8;
250	dev->dev_addr[2] = val & 0xff;
251	val = SONIC_READ(SONIC_CAP0);
252	dev->dev_addr[1] = val >> 8;
253	dev->dev_addr[0] = val & 0xff;
254
255	if (!INVALID_MAC(dev->dev_addr))
256		return;
257
258	/* Still nonsense ... messed up someplace! */
259
260	printk(KERN_WARNING "macsonic: MAC address in CAM entry 15 "
261	                    "seems invalid, will use a random MAC\n");
262	eth_hw_addr_random(dev);
263}
264
265static int mac_onboard_sonic_probe(struct net_device *dev)
266{
267	struct sonic_local* lp = netdev_priv(dev);
268	int sr;
269	bool commslot = macintosh_config->expansion_type == MAC_EXP_PDS_COMM;
270
271	/* Bogus probing, on the models which may or may not have
272	   Ethernet (BTW, the Ethernet *is* always at the same
273	   address, and nothing else lives there, at least if Apple's
274	   documentation is to be believed) */
275	if (commslot || macintosh_config->ident == MAC_MODEL_C610) {
276		int card_present;
277
278		card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS);
279		if (!card_present) {
280			pr_info("Onboard/comm-slot SONIC not found\n");
281			return -ENODEV;
282		}
283	}
284
285	/* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
286	 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
287	dev->base_addr = ONBOARD_SONIC_REGISTERS;
288	if (via_alt_mapping)
289		dev->irq = IRQ_AUTO_3;
290	else
291		dev->irq = IRQ_NUBUS_9;
292
293	/* The PowerBook's SONIC is 16 bit always. */
294	if (macintosh_config->ident == MAC_MODEL_PB520) {
295		lp->reg_offset = 0;
296		lp->dma_bitmode = SONIC_BITMODE16;
297	} else if (commslot) {
298		/* Some of the comm-slot cards are 16 bit.  But some
299		   of them are not.  The 32-bit cards use offset 2 and
300		   have known revisions, we try reading the revision
301		   register at offset 2, if we don't get a known revision
302		   we assume 16 bit at offset 0.  */
303		lp->reg_offset = 2;
304		lp->dma_bitmode = SONIC_BITMODE16;
305
306		sr = SONIC_READ(SONIC_SR);
307		if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101)
308			/* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */
309			lp->dma_bitmode = SONIC_BITMODE32;
310		else {
311			lp->dma_bitmode = SONIC_BITMODE16;
312			lp->reg_offset = 0;
313		}
314	} else {
315		/* All onboard cards are at offset 2 with 32 bit DMA. */
316		lp->reg_offset = 2;
317		lp->dma_bitmode = SONIC_BITMODE32;
318	}
319
320	pr_info("Onboard/comm-slot SONIC, revision 0x%04x, %d bit DMA, register offset %d\n",
321		SONIC_READ(SONIC_SR), lp->dma_bitmode ? 32 : 16,
322		lp->reg_offset);
323
324	/* This is sometimes useful to find out how MacOS configured the card */
325	pr_debug("%s: DCR=0x%04x, DCR2=0x%04x\n", __func__,
326		 SONIC_READ(SONIC_DCR) & 0xffff,
327		 SONIC_READ(SONIC_DCR2) & 0xffff);
328
329	/* Software reset, then initialize control registers. */
330	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
331
332	SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS |
333	                       SONIC_DCR_RFT1  | SONIC_DCR_TFT0 |
334	                       (lp->dma_bitmode ? SONIC_DCR_DW : 0));
335
336	/* This *must* be written back to in order to restore the
337	 * extended programmable output bits, as it may not have been
338	 * initialised since the hardware reset. */
339	SONIC_WRITE(SONIC_DCR2, 0);
340
341	/* Clear *and* disable interrupts to be on the safe side */
342	SONIC_WRITE(SONIC_IMR, 0);
343	SONIC_WRITE(SONIC_ISR, 0x7fff);
344
345	/* Now look for the MAC address. */
346	mac_onboard_sonic_ethernet_addr(dev);
347
348	pr_info("SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
349		dev->base_addr, dev->dev_addr, dev->irq);
350
351	/* Shared init code */
352	return macsonic_init(dev);
353}
354
355static int mac_sonic_nubus_ethernet_addr(struct net_device *dev,
356					 unsigned long prom_addr, int id)
357{
358	int i;
359	for(i = 0; i < 6; i++)
360		dev->dev_addr[i] = SONIC_READ_PROM(i);
361
362	/* Some of the addresses are bit-reversed */
363	if (id != MACSONIC_DAYNA)
364		bit_reverse_addr(dev->dev_addr);
365
366	return 0;
367}
368
369static int macsonic_ident(struct nubus_rsrc *fres)
370{
371	if (fres->dr_hw == NUBUS_DRHW_ASANTE_LC &&
372	    fres->dr_sw == NUBUS_DRSW_SONIC_LC)
373		return MACSONIC_DAYNALINK;
374	if (fres->dr_hw == NUBUS_DRHW_SONIC &&
375	    fres->dr_sw == NUBUS_DRSW_APPLE) {
376		/* There has to be a better way to do this... */
377		if (strstr(fres->board->name, "DuoDock"))
378			return MACSONIC_DUODOCK;
379		else
380			return MACSONIC_APPLE;
381	}
382
383	if (fres->dr_hw == NUBUS_DRHW_SMC9194 &&
384	    fres->dr_sw == NUBUS_DRSW_DAYNA)
385		return MACSONIC_DAYNA;
386
387	if (fres->dr_hw == NUBUS_DRHW_APPLE_SONIC_LC &&
388	    fres->dr_sw == 0) { /* huh? */
389		return MACSONIC_APPLE16;
390	}
391	return -1;
392}
393
394static int mac_sonic_nubus_probe_board(struct nubus_board *board, int id,
395				       struct net_device *dev)
396{
397	struct sonic_local* lp = netdev_priv(dev);
398	unsigned long base_addr, prom_addr;
399	u16 sonic_dcr;
400	int reg_offset, dma_bitmode;
401
402	switch (id) {
403	case MACSONIC_DUODOCK:
404		base_addr = board->slot_addr + DUODOCK_SONIC_REGISTERS;
405		prom_addr = board->slot_addr + DUODOCK_SONIC_PROM_BASE;
406		sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 |
407		            SONIC_DCR_TFT0;
408		reg_offset = 2;
409		dma_bitmode = SONIC_BITMODE32;
410		break;
411	case MACSONIC_APPLE:
412		base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
413		prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE;
414		sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
415		reg_offset = 0;
416		dma_bitmode = SONIC_BITMODE32;
417		break;
418	case MACSONIC_APPLE16:
419		base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
420		prom_addr = board->slot_addr + APPLE_SONIC_PROM_BASE;
421		sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
422		            SONIC_DCR_PO1 | SONIC_DCR_BMS;
423		reg_offset = 0;
424		dma_bitmode = SONIC_BITMODE16;
425		break;
426	case MACSONIC_DAYNALINK:
427		base_addr = board->slot_addr + APPLE_SONIC_REGISTERS;
428		prom_addr = board->slot_addr + DAYNALINK_PROM_BASE;
429		sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
430		            SONIC_DCR_PO1 | SONIC_DCR_BMS;
431		reg_offset = 0;
432		dma_bitmode = SONIC_BITMODE16;
433		break;
434	case MACSONIC_DAYNA:
435		base_addr = board->slot_addr + DAYNA_SONIC_REGISTERS;
436		prom_addr = board->slot_addr + DAYNA_SONIC_MAC_ADDR;
437		sonic_dcr = SONIC_DCR_BMS |
438		            SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
439		reg_offset = 0;
440		dma_bitmode = SONIC_BITMODE16;
441		break;
442	default:
443		printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
444		return -ENODEV;
445	}
446
447	/* Danger!  My arms are flailing wildly!  You *must* set lp->reg_offset
448	 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
449	dev->base_addr = base_addr;
450	lp->reg_offset = reg_offset;
451	lp->dma_bitmode = dma_bitmode;
452	dev->irq = SLOT2IRQ(board->slot);
453
454	dev_info(&board->dev, "%s, revision 0x%04x, %d bit DMA, register offset %d\n",
455		 board->name, SONIC_READ(SONIC_SR),
456		 lp->dma_bitmode ? 32 : 16, lp->reg_offset);
457
458	/* This is sometimes useful to find out how MacOS configured the card */
459	dev_dbg(&board->dev, "%s: DCR=0x%04x, DCR2=0x%04x\n", __func__,
460		SONIC_READ(SONIC_DCR) & 0xffff,
461		SONIC_READ(SONIC_DCR2) & 0xffff);
462
463	/* Software reset, then initialize control registers. */
464	SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
465	SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0));
466	/* This *must* be written back to in order to restore the
467	 * extended programmable output bits, since it may not have been
468	 * initialised since the hardware reset. */
469	SONIC_WRITE(SONIC_DCR2, 0);
470
471	/* Clear *and* disable interrupts to be on the safe side */
472	SONIC_WRITE(SONIC_IMR, 0);
473	SONIC_WRITE(SONIC_ISR, 0x7fff);
474
475	/* Now look for the MAC address. */
476	if (mac_sonic_nubus_ethernet_addr(dev, prom_addr, id) != 0)
477		return -ENODEV;
478
479	dev_info(&board->dev, "SONIC ethernet @%08lx, MAC %pM, IRQ %d\n",
480		 dev->base_addr, dev->dev_addr, dev->irq);
481
482	/* Shared init code */
483	return macsonic_init(dev);
484}
485
486static int mac_sonic_platform_probe(struct platform_device *pdev)
487{
488	struct net_device *dev;
489	struct sonic_local *lp;
490	int err;
491
492	dev = alloc_etherdev(sizeof(struct sonic_local));
493	if (!dev)
494		return -ENOMEM;
495
496	lp = netdev_priv(dev);
497	lp->device = &pdev->dev;
498	SET_NETDEV_DEV(dev, &pdev->dev);
499	platform_set_drvdata(pdev, dev);
500
501	err = mac_onboard_sonic_probe(dev);
502	if (err)
503		goto out;
504
505	sonic_msg_init(dev);
506
507	err = register_netdev(dev);
508	if (err)
509		goto out;
510
511	return 0;
512
513out:
514	free_netdev(dev);
515
516	return err;
517}
518
519MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
520MODULE_ALIAS("platform:macsonic");
521
522#include "sonic.c"
523
524static int mac_sonic_platform_remove(struct platform_device *pdev)
525{
526	struct net_device *dev = platform_get_drvdata(pdev);
527	struct sonic_local* lp = netdev_priv(dev);
528
529	unregister_netdev(dev);
530	dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
531	                  lp->descriptors, lp->descriptors_laddr);
532	free_netdev(dev);
533
534	return 0;
535}
536
537static struct platform_driver mac_sonic_platform_driver = {
538	.probe  = mac_sonic_platform_probe,
539	.remove = mac_sonic_platform_remove,
540	.driver = {
541		.name = "macsonic",
542	},
543};
544
545static int mac_sonic_nubus_probe(struct nubus_board *board)
546{
547	struct net_device *ndev;
548	struct sonic_local *lp;
549	struct nubus_rsrc *fres;
550	int id = -1;
551	int err;
552
553	/* The platform driver will handle a PDS or Comm Slot card (even if
554	 * it has a pseudoslot declaration ROM).
555	 */
556	if (macintosh_config->expansion_type == MAC_EXP_PDS_COMM)
557		return -ENODEV;
558
559	for_each_board_func_rsrc(board, fres) {
560		if (fres->category != NUBUS_CAT_NETWORK ||
561		    fres->type != NUBUS_TYPE_ETHERNET)
562			continue;
563
564		id = macsonic_ident(fres);
565		if (id != -1)
566			break;
567	}
568	if (!fres)
569		return -ENODEV;
570
571	ndev = alloc_etherdev(sizeof(struct sonic_local));
572	if (!ndev)
573		return -ENOMEM;
574
575	lp = netdev_priv(ndev);
576	lp->device = &board->dev;
577	SET_NETDEV_DEV(ndev, &board->dev);
578
579	err = mac_sonic_nubus_probe_board(board, id, ndev);
580	if (err)
581		goto out;
582
583	sonic_msg_init(ndev);
584
585	err = register_netdev(ndev);
586	if (err)
587		goto out;
588
589	nubus_set_drvdata(board, ndev);
590
591	return 0;
592
593out:
594	free_netdev(ndev);
595	return err;
596}
597
598static int mac_sonic_nubus_remove(struct nubus_board *board)
599{
600	struct net_device *ndev = nubus_get_drvdata(board);
601	struct sonic_local *lp = netdev_priv(ndev);
602
603	unregister_netdev(ndev);
604	dma_free_coherent(lp->device,
605			  SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
606			  lp->descriptors, lp->descriptors_laddr);
607	free_netdev(ndev);
608
609	return 0;
610}
611
612static struct nubus_driver mac_sonic_nubus_driver = {
613	.probe  = mac_sonic_nubus_probe,
614	.remove = mac_sonic_nubus_remove,
615	.driver = {
616		.name = "macsonic-nubus",
617		.owner = THIS_MODULE,
618	},
619};
620
621static int perr, nerr;
622
623static int __init mac_sonic_init(void)
624{
625	perr = platform_driver_register(&mac_sonic_platform_driver);
626	nerr = nubus_driver_register(&mac_sonic_nubus_driver);
627	return 0;
628}
629module_init(mac_sonic_init);
630
631static void __exit mac_sonic_exit(void)
632{
633	if (!perr)
634		platform_driver_unregister(&mac_sonic_platform_driver);
635	if (!nerr)
636		nubus_driver_unregister(&mac_sonic_nubus_driver);
637}
638module_exit(mac_sonic_exit);