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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);
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
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 undo_probe;
510
511 return 0;
512
513undo_probe:
514 dma_free_coherent(lp->device,
515 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
516 lp->descriptors, lp->descriptors_laddr);
517out:
518 free_netdev(dev);
519
520 return err;
521}
522
523MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
524MODULE_ALIAS("platform:macsonic");
525
526#include "sonic.c"
527
528static int mac_sonic_platform_remove(struct platform_device *pdev)
529{
530 struct net_device *dev = platform_get_drvdata(pdev);
531 struct sonic_local* lp = netdev_priv(dev);
532
533 unregister_netdev(dev);
534 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
535 lp->descriptors, lp->descriptors_laddr);
536 free_netdev(dev);
537
538 return 0;
539}
540
541static struct platform_driver mac_sonic_platform_driver = {
542 .probe = mac_sonic_platform_probe,
543 .remove = mac_sonic_platform_remove,
544 .driver = {
545 .name = "macsonic",
546 },
547};
548
549static int mac_sonic_nubus_probe(struct nubus_board *board)
550{
551 struct net_device *ndev;
552 struct sonic_local *lp;
553 struct nubus_rsrc *fres;
554 int id = -1;
555 int err;
556
557 /* The platform driver will handle a PDS or Comm Slot card (even if
558 * it has a pseudoslot declaration ROM).
559 */
560 if (macintosh_config->expansion_type == MAC_EXP_PDS_COMM)
561 return -ENODEV;
562
563 for_each_board_func_rsrc(board, fres) {
564 if (fres->category != NUBUS_CAT_NETWORK ||
565 fres->type != NUBUS_TYPE_ETHERNET)
566 continue;
567
568 id = macsonic_ident(fres);
569 if (id != -1)
570 break;
571 }
572 if (!fres)
573 return -ENODEV;
574
575 ndev = alloc_etherdev(sizeof(struct sonic_local));
576 if (!ndev)
577 return -ENOMEM;
578
579 lp = netdev_priv(ndev);
580 lp->device = &board->dev;
581 SET_NETDEV_DEV(ndev, &board->dev);
582
583 err = mac_sonic_nubus_probe_board(board, id, ndev);
584 if (err)
585 goto out;
586
587 sonic_msg_init(ndev);
588
589 err = register_netdev(ndev);
590 if (err)
591 goto undo_probe;
592
593 nubus_set_drvdata(board, ndev);
594
595 return 0;
596
597undo_probe:
598 dma_free_coherent(lp->device,
599 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
600 lp->descriptors, lp->descriptors_laddr);
601out:
602 free_netdev(ndev);
603 return err;
604}
605
606static int mac_sonic_nubus_remove(struct nubus_board *board)
607{
608 struct net_device *ndev = nubus_get_drvdata(board);
609 struct sonic_local *lp = netdev_priv(ndev);
610
611 unregister_netdev(ndev);
612 dma_free_coherent(lp->device,
613 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
614 lp->descriptors, lp->descriptors_laddr);
615 free_netdev(ndev);
616
617 return 0;
618}
619
620static struct nubus_driver mac_sonic_nubus_driver = {
621 .probe = mac_sonic_nubus_probe,
622 .remove = mac_sonic_nubus_remove,
623 .driver = {
624 .name = "macsonic-nubus",
625 .owner = THIS_MODULE,
626 },
627};
628
629static int perr, nerr;
630
631static int __init mac_sonic_init(void)
632{
633 perr = platform_driver_register(&mac_sonic_platform_driver);
634 nerr = nubus_driver_register(&mac_sonic_nubus_driver);
635 return 0;
636}
637module_init(mac_sonic_init);
638
639static void __exit mac_sonic_exit(void)
640{
641 if (!perr)
642 platform_driver_unregister(&mac_sonic_platform_driver);
643 if (!nerr)
644 nubus_driver_unregister(&mac_sonic_nubus_driver);
645}
646module_exit(mac_sonic_exit);