xref: /linux/drivers/net/ethernet/natsemi/macsonic.c (revision b8fc42dc065742bc68df6a61a2aff8cbe364fa17)
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 
77 enum 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 
109 static 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 
117 static 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 
145 err_irq_nubus:
146 	if (dev->irq == IRQ_AUTO_3)
147 		free_irq(IRQ_NUBUS_9, dev);
148 err_irq:
149 	free_irq(dev->irq, dev);
150 err:
151 	return retval;
152 }
153 
154 static 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 
164 static 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 
175 static 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 
201 static 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 
269 static 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 
359 static 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 
376 static 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 
401 static 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 
493 static 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 
520 undo_probe:
521 	dma_free_coherent(lp->device,
522 			  SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
523 			  lp->descriptors, lp->descriptors_laddr);
524 out:
525 	free_netdev(dev);
526 
527 	return err;
528 }
529 
530 MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
531 MODULE_ALIAS("platform:macsonic");
532 
533 #include "sonic.c"
534 
535 static 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 
546 static 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 
554 static 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 
602 undo_probe:
603 	dma_free_coherent(lp->device,
604 			  SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
605 			  lp->descriptors, lp->descriptors_laddr);
606 out:
607 	free_netdev(ndev);
608 	return err;
609 }
610 
611 static 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 
623 static 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 
632 static int perr, nerr;
633 
634 static 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 }
640 module_init(mac_sonic_init);
641 
642 static 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 }
649 module_exit(mac_sonic_exit);
650