kbuild: document howto build external modules using several directories
[linux-2.6/verdex.git] / drivers / net / macsonic.c
blob02d5c6822733440f3c78b8e2b1b6c5f8787707a9
1 /*
2 * macsonic.c
4 * (C) 2005 Finn Thain
6 * Converted to DMA API, converted to unified driver model, made it work as
7 * a module again, and from the mac68k project, introduced more 32-bit cards
8 * and dhd's support for 16-bit cards.
10 * (C) 1998 Alan Cox
12 * Debugging Andreas Ehliar, Michael Schmitz
14 * Based on code
15 * (C) 1996 by Thomas Bogendoerfer (tsbogend@bigbug.franken.de)
17 * This driver is based on work from Andreas Busse, but most of
18 * the code is rewritten.
20 * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
22 * A driver for the Mac onboard Sonic ethernet chip.
24 * 98/12/21 MSch: judged from tests on Q800, it's basically working,
25 * but eating up both receive and transmit resources
26 * and duplicating packets. Needs more testing.
28 * 99/01/03 MSch: upgraded to version 0.92 of the core driver, fixed.
30 * 00/10/31 sammy@oh.verio.com: Updated driver for 2.4 kernels, fixed problems
31 * on centris.
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/fcntl.h>
38 #include <linux/interrupt.h>
39 #include <linux/init.h>
40 #include <linux/ioport.h>
41 #include <linux/in.h>
42 #include <linux/slab.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>
53 #include <asm/bootinfo.h>
54 #include <asm/system.h>
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>
63 static char mac_sonic_string[] = "macsonic";
64 static struct platform_device *mac_sonic_device;
66 #include "sonic.h"
68 /* These should basically be bus-size and endian independent (since
69 the SONIC is at least smart enough that it uses the same endianness
70 as the host, unlike certain less enlightened Macintosh NICs) */
71 #define SONIC_READ(reg) (nubus_readw(dev->base_addr + (reg * 4) \
72 + lp->reg_offset))
73 #define SONIC_WRITE(reg,val) (nubus_writew(val, dev->base_addr + (reg * 4) \
74 + lp->reg_offset))
76 /* use 0 for production, 1 for verification, >1 for debug */
77 #ifdef SONIC_DEBUG
78 static unsigned int sonic_debug = SONIC_DEBUG;
79 #else
80 static unsigned int sonic_debug = 1;
81 #endif
83 static int sonic_version_printed;
85 extern int mac_onboard_sonic_probe(struct net_device* dev);
86 extern int mac_nubus_sonic_probe(struct net_device* dev);
88 /* For onboard SONIC */
89 #define ONBOARD_SONIC_REGISTERS 0x50F0A000
90 #define ONBOARD_SONIC_PROM_BASE 0x50f08000
92 enum macsonic_type {
93 MACSONIC_DUODOCK,
94 MACSONIC_APPLE,
95 MACSONIC_APPLE16,
96 MACSONIC_DAYNA,
97 MACSONIC_DAYNALINK
100 /* For the built-in SONIC in the Duo Dock */
101 #define DUODOCK_SONIC_REGISTERS 0xe10000
102 #define DUODOCK_SONIC_PROM_BASE 0xe12000
104 /* For Apple-style NuBus SONIC */
105 #define APPLE_SONIC_REGISTERS 0
106 #define APPLE_SONIC_PROM_BASE 0x40000
108 /* Daynalink LC SONIC */
109 #define DAYNALINK_PROM_BASE 0x400000
111 /* For Dayna-style NuBus SONIC (haven't seen one yet) */
112 #define DAYNA_SONIC_REGISTERS 0x180000
113 /* This is what OpenBSD says. However, this is definitely in NuBus
114 ROM space so we should be able to get it by walking the NuBus
115 resource directories */
116 #define DAYNA_SONIC_MAC_ADDR 0xffe004
118 #define SONIC_READ_PROM(addr) nubus_readb(prom_addr+addr)
121 * For reversing the PROM address
124 static unsigned char nibbletab[] = {0, 8, 4, 12, 2, 10, 6, 14,
125 1, 9, 5, 13, 3, 11, 7, 15};
127 static inline void bit_reverse_addr(unsigned char addr[6])
129 int i;
131 for(i = 0; i < 6; i++)
132 addr[i] = ((nibbletab[addr[i] & 0xf] << 4) |
133 nibbletab[(addr[i] >> 4) &0xf]);
136 int __init macsonic_init(struct net_device* dev)
138 struct sonic_local* lp = netdev_priv(dev);
140 /* Allocate the entire chunk of memory for the descriptors.
141 Note that this cannot cross a 64K boundary. */
142 if ((lp->descriptors = dma_alloc_coherent(lp->device,
143 SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
144 &lp->descriptors_laddr, GFP_KERNEL)) == NULL) {
145 printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", lp->device->bus_id);
146 return -ENOMEM;
149 /* Now set up the pointers to point to the appropriate places */
150 lp->cda = lp->descriptors;
151 lp->tda = lp->cda + (SIZEOF_SONIC_CDA
152 * SONIC_BUS_SCALE(lp->dma_bitmode));
153 lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
154 * SONIC_BUS_SCALE(lp->dma_bitmode));
155 lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
156 * SONIC_BUS_SCALE(lp->dma_bitmode));
158 lp->cda_laddr = lp->descriptors_laddr;
159 lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA
160 * SONIC_BUS_SCALE(lp->dma_bitmode));
161 lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS
162 * SONIC_BUS_SCALE(lp->dma_bitmode));
163 lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS
164 * SONIC_BUS_SCALE(lp->dma_bitmode));
166 dev->open = sonic_open;
167 dev->stop = sonic_close;
168 dev->hard_start_xmit = sonic_send_packet;
169 dev->get_stats = sonic_get_stats;
170 dev->set_multicast_list = &sonic_multicast_list;
171 dev->tx_timeout = sonic_tx_timeout;
172 dev->watchdog_timeo = TX_TIMEOUT;
175 * clear tally counter
177 SONIC_WRITE(SONIC_CRCT, 0xffff);
178 SONIC_WRITE(SONIC_FAET, 0xffff);
179 SONIC_WRITE(SONIC_MPT, 0xffff);
181 return 0;
184 int __init mac_onboard_sonic_ethernet_addr(struct net_device* dev)
186 struct sonic_local *lp = netdev_priv(dev);
187 const int prom_addr = ONBOARD_SONIC_PROM_BASE;
188 int i;
190 /* On NuBus boards we can sometimes look in the ROM resources.
191 No such luck for comm-slot/onboard. */
192 for(i = 0; i < 6; i++)
193 dev->dev_addr[i] = SONIC_READ_PROM(i);
195 /* Most of the time, the address is bit-reversed. The NetBSD
196 source has a rather long and detailed historical account of
197 why this is so. */
198 if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
199 memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
200 memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
201 memcmp(dev->dev_addr, "\x00\x05\x02", 3))
202 bit_reverse_addr(dev->dev_addr);
203 else
204 return 0;
206 /* If we still have what seems to be a bogus address, we'll
207 look in the CAM. The top entry should be ours. */
208 /* Danger! This only works if MacOS has already initialized
209 the card... */
210 if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
211 memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
212 memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
213 memcmp(dev->dev_addr, "\x00\x05\x02", 3))
215 unsigned short val;
217 printk(KERN_INFO "macsonic: PROM seems to be wrong, trying CAM entry 15\n");
219 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
220 SONIC_WRITE(SONIC_CEP, 15);
222 val = SONIC_READ(SONIC_CAP2);
223 dev->dev_addr[5] = val >> 8;
224 dev->dev_addr[4] = val & 0xff;
225 val = SONIC_READ(SONIC_CAP1);
226 dev->dev_addr[3] = val >> 8;
227 dev->dev_addr[2] = val & 0xff;
228 val = SONIC_READ(SONIC_CAP0);
229 dev->dev_addr[1] = val >> 8;
230 dev->dev_addr[0] = val & 0xff;
232 printk(KERN_INFO "HW Address from CAM 15: ");
233 for (i = 0; i < 6; i++) {
234 printk("%2.2x", dev->dev_addr[i]);
235 if (i < 5)
236 printk(":");
238 printk("\n");
239 } else return 0;
241 if (memcmp(dev->dev_addr, "\x08\x00\x07", 3) &&
242 memcmp(dev->dev_addr, "\x00\xA0\x40", 3) &&
243 memcmp(dev->dev_addr, "\x00\x80\x19", 3) &&
244 memcmp(dev->dev_addr, "\x00\x05\x02", 3))
247 * Still nonsense ... messed up someplace!
249 printk(KERN_ERR "macsonic: ERROR (INVALID MAC)\n");
250 return -EIO;
251 } else return 0;
254 int __init mac_onboard_sonic_probe(struct net_device* dev)
256 /* Bwahahaha */
257 static int once_is_more_than_enough;
258 struct sonic_local* lp = netdev_priv(dev);
259 int sr;
260 int commslot = 0;
262 if (once_is_more_than_enough)
263 return -ENODEV;
264 once_is_more_than_enough = 1;
266 if (!MACH_IS_MAC)
267 return -ENODEV;
269 if (macintosh_config->ether_type != MAC_ETHER_SONIC)
270 return -ENODEV;
272 printk(KERN_INFO "Checking for internal Macintosh ethernet (SONIC).. ");
274 /* Bogus probing, on the models which may or may not have
275 Ethernet (BTW, the Ethernet *is* always at the same
276 address, and nothing else lives there, at least if Apple's
277 documentation is to be believed) */
278 if (macintosh_config->ident == MAC_MODEL_Q630 ||
279 macintosh_config->ident == MAC_MODEL_P588 ||
280 macintosh_config->ident == MAC_MODEL_P575 ||
281 macintosh_config->ident == MAC_MODEL_C610) {
282 unsigned long flags;
283 int card_present;
285 local_irq_save(flags);
286 card_present = hwreg_present((void*)ONBOARD_SONIC_REGISTERS);
287 local_irq_restore(flags);
289 if (!card_present) {
290 printk("none.\n");
291 return -ENODEV;
293 commslot = 1;
296 printk("yes\n");
298 /* Danger! My arms are flailing wildly! You *must* set lp->reg_offset
299 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
300 dev->base_addr = ONBOARD_SONIC_REGISTERS;
301 if (via_alt_mapping)
302 dev->irq = IRQ_AUTO_3;
303 else
304 dev->irq = IRQ_NUBUS_9;
306 if (!sonic_version_printed) {
307 printk(KERN_INFO "%s", version);
308 sonic_version_printed = 1;
310 printk(KERN_INFO "%s: onboard / comm-slot SONIC at 0x%08lx\n",
311 lp->device->bus_id, dev->base_addr);
313 /* The PowerBook's SONIC is 16 bit always. */
314 if (macintosh_config->ident == MAC_MODEL_PB520) {
315 lp->reg_offset = 0;
316 lp->dma_bitmode = SONIC_BITMODE16;
317 sr = SONIC_READ(SONIC_SR);
318 } else if (commslot) {
319 /* Some of the comm-slot cards are 16 bit. But some
320 of them are not. The 32-bit cards use offset 2 and
321 have known revisions, we try reading the revision
322 register at offset 2, if we don't get a known revision
323 we assume 16 bit at offset 0. */
324 lp->reg_offset = 2;
325 lp->dma_bitmode = SONIC_BITMODE16;
327 sr = SONIC_READ(SONIC_SR);
328 if (sr == 0x0004 || sr == 0x0006 || sr == 0x0100 || sr == 0x0101)
329 /* 83932 is 0x0004 or 0x0006, 83934 is 0x0100 or 0x0101 */
330 lp->dma_bitmode = SONIC_BITMODE32;
331 else {
332 lp->dma_bitmode = SONIC_BITMODE16;
333 lp->reg_offset = 0;
334 sr = SONIC_READ(SONIC_SR);
336 } else {
337 /* All onboard cards are at offset 2 with 32 bit DMA. */
338 lp->reg_offset = 2;
339 lp->dma_bitmode = SONIC_BITMODE32;
340 sr = SONIC_READ(SONIC_SR);
342 printk(KERN_INFO
343 "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
344 lp->device->bus_id, sr, lp->dma_bitmode?32:16, lp->reg_offset);
346 #if 0 /* This is sometimes useful to find out how MacOS configured the card. */
347 printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", lp->device->bus_id,
348 SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
349 #endif
351 /* Software reset, then initialize control registers. */
352 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
354 SONIC_WRITE(SONIC_DCR, SONIC_DCR_EXBUS | SONIC_DCR_BMS |
355 SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
356 (lp->dma_bitmode ? SONIC_DCR_DW : 0));
358 /* This *must* be written back to in order to restore the
359 * extended programmable output bits, as it may not have been
360 * initialised since the hardware reset. */
361 SONIC_WRITE(SONIC_DCR2, 0);
363 /* Clear *and* disable interrupts to be on the safe side */
364 SONIC_WRITE(SONIC_IMR, 0);
365 SONIC_WRITE(SONIC_ISR, 0x7fff);
367 /* Now look for the MAC address. */
368 if (mac_onboard_sonic_ethernet_addr(dev) != 0)
369 return -ENODEV;
371 /* Shared init code */
372 return macsonic_init(dev);
375 int __init mac_nubus_sonic_ethernet_addr(struct net_device* dev,
376 unsigned long prom_addr,
377 int id)
379 int i;
380 for(i = 0; i < 6; i++)
381 dev->dev_addr[i] = SONIC_READ_PROM(i);
383 /* Some of the addresses are bit-reversed */
384 if (id != MACSONIC_DAYNA)
385 bit_reverse_addr(dev->dev_addr);
387 return 0;
390 int __init macsonic_ident(struct nubus_dev* ndev)
392 if (ndev->dr_hw == NUBUS_DRHW_ASANTE_LC &&
393 ndev->dr_sw == NUBUS_DRSW_SONIC_LC)
394 return MACSONIC_DAYNALINK;
395 if (ndev->dr_hw == NUBUS_DRHW_SONIC &&
396 ndev->dr_sw == NUBUS_DRSW_APPLE) {
397 /* There has to be a better way to do this... */
398 if (strstr(ndev->board->name, "DuoDock"))
399 return MACSONIC_DUODOCK;
400 else
401 return MACSONIC_APPLE;
404 if (ndev->dr_hw == NUBUS_DRHW_SMC9194 &&
405 ndev->dr_sw == NUBUS_DRSW_DAYNA)
406 return MACSONIC_DAYNA;
408 if (ndev->dr_hw == NUBUS_DRHW_SONIC_LC &&
409 ndev->dr_sw == 0) { /* huh? */
410 return MACSONIC_APPLE16;
412 return -1;
415 int __init mac_nubus_sonic_probe(struct net_device* dev)
417 static int slots;
418 struct nubus_dev* ndev = NULL;
419 struct sonic_local* lp = netdev_priv(dev);
420 unsigned long base_addr, prom_addr;
421 u16 sonic_dcr;
422 int id = -1;
423 int reg_offset, dma_bitmode;
425 /* Find the first SONIC that hasn't been initialized already */
426 while ((ndev = nubus_find_type(NUBUS_CAT_NETWORK,
427 NUBUS_TYPE_ETHERNET, ndev)) != NULL)
429 /* Have we seen it already? */
430 if (slots & (1<<ndev->board->slot))
431 continue;
432 slots |= 1<<ndev->board->slot;
434 /* Is it one of ours? */
435 if ((id = macsonic_ident(ndev)) != -1)
436 break;
439 if (ndev == NULL)
440 return -ENODEV;
442 switch (id) {
443 case MACSONIC_DUODOCK:
444 base_addr = ndev->board->slot_addr + DUODOCK_SONIC_REGISTERS;
445 prom_addr = ndev->board->slot_addr + DUODOCK_SONIC_PROM_BASE;
446 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT0 | SONIC_DCR_RFT1 |
447 SONIC_DCR_TFT0;
448 reg_offset = 2;
449 dma_bitmode = SONIC_BITMODE32;
450 break;
451 case MACSONIC_APPLE:
452 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
453 prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
454 sonic_dcr = SONIC_DCR_BMS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0;
455 reg_offset = 0;
456 dma_bitmode = SONIC_BITMODE32;
457 break;
458 case MACSONIC_APPLE16:
459 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
460 prom_addr = ndev->board->slot_addr + APPLE_SONIC_PROM_BASE;
461 sonic_dcr = SONIC_DCR_EXBUS | SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
462 SONIC_DCR_PO1 | SONIC_DCR_BMS;
463 reg_offset = 0;
464 dma_bitmode = SONIC_BITMODE16;
465 break;
466 case MACSONIC_DAYNALINK:
467 base_addr = ndev->board->slot_addr + APPLE_SONIC_REGISTERS;
468 prom_addr = ndev->board->slot_addr + DAYNALINK_PROM_BASE;
469 sonic_dcr = SONIC_DCR_RFT1 | SONIC_DCR_TFT0 |
470 SONIC_DCR_PO1 | SONIC_DCR_BMS;
471 reg_offset = 0;
472 dma_bitmode = SONIC_BITMODE16;
473 break;
474 case MACSONIC_DAYNA:
475 base_addr = ndev->board->slot_addr + DAYNA_SONIC_REGISTERS;
476 prom_addr = ndev->board->slot_addr + DAYNA_SONIC_MAC_ADDR;
477 sonic_dcr = SONIC_DCR_BMS |
478 SONIC_DCR_RFT1 | SONIC_DCR_TFT0 | SONIC_DCR_PO1;
479 reg_offset = 0;
480 dma_bitmode = SONIC_BITMODE16;
481 break;
482 default:
483 printk(KERN_ERR "macsonic: WTF, id is %d\n", id);
484 return -ENODEV;
487 /* Danger! My arms are flailing wildly! You *must* set lp->reg_offset
488 * and dev->base_addr before using SONIC_READ() or SONIC_WRITE() */
489 dev->base_addr = base_addr;
490 lp->reg_offset = reg_offset;
491 lp->dma_bitmode = dma_bitmode;
492 dev->irq = SLOT2IRQ(ndev->board->slot);
494 if (!sonic_version_printed) {
495 printk(KERN_INFO "%s", version);
496 sonic_version_printed = 1;
498 printk(KERN_INFO "%s: %s in slot %X\n",
499 lp->device->bus_id, ndev->board->name, ndev->board->slot);
500 printk(KERN_INFO "%s: revision 0x%04x, using %d bit DMA and register offset %d\n",
501 lp->device->bus_id, SONIC_READ(SONIC_SR), dma_bitmode?32:16, reg_offset);
503 #if 0 /* This is sometimes useful to find out how MacOS configured the card. */
504 printk(KERN_INFO "%s: DCR: 0x%04x, DCR2: 0x%04x\n", lp->device->bus_id,
505 SONIC_READ(SONIC_DCR) & 0xffff, SONIC_READ(SONIC_DCR2) & 0xffff);
506 #endif
508 /* Software reset, then initialize control registers. */
509 SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
510 SONIC_WRITE(SONIC_DCR, sonic_dcr | (dma_bitmode ? SONIC_DCR_DW : 0));
511 /* This *must* be written back to in order to restore the
512 * extended programmable output bits, since it may not have been
513 * initialised since the hardware reset. */
514 SONIC_WRITE(SONIC_DCR2, 0);
516 /* Clear *and* disable interrupts to be on the safe side */
517 SONIC_WRITE(SONIC_IMR, 0);
518 SONIC_WRITE(SONIC_ISR, 0x7fff);
520 /* Now look for the MAC address. */
521 if (mac_nubus_sonic_ethernet_addr(dev, prom_addr, id) != 0)
522 return -ENODEV;
524 /* Shared init code */
525 return macsonic_init(dev);
528 static int __init mac_sonic_probe(struct platform_device *device)
530 struct net_device *dev;
531 struct sonic_local *lp;
532 int err;
533 int i;
535 dev = alloc_etherdev(sizeof(struct sonic_local));
536 if (!dev)
537 return -ENOMEM;
539 lp = netdev_priv(dev);
540 lp->device = &device->dev;
541 SET_NETDEV_DEV(dev, &device->dev);
542 SET_MODULE_OWNER(dev);
544 /* This will catch fatal stuff like -ENOMEM as well as success */
545 err = mac_onboard_sonic_probe(dev);
546 if (err == 0)
547 goto found;
548 if (err != -ENODEV)
549 goto out;
550 err = mac_nubus_sonic_probe(dev);
551 if (err)
552 goto out;
553 found:
554 err = register_netdev(dev);
555 if (err)
556 goto out;
558 printk("%s: MAC ", dev->name);
559 for (i = 0; i < 6; i++) {
560 printk("%2.2x", dev->dev_addr[i]);
561 if (i < 5)
562 printk(":");
564 printk(" IRQ %d\n", dev->irq);
566 return 0;
568 out:
569 free_netdev(dev);
571 return err;
574 MODULE_DESCRIPTION("Macintosh SONIC ethernet driver");
575 module_param(sonic_debug, int, 0);
576 MODULE_PARM_DESC(sonic_debug, "macsonic debug level (1-4)");
578 #define SONIC_IRQ_FLAG IRQ_FLG_FAST
580 #include "sonic.c"
582 static int __devexit mac_sonic_device_remove (struct platform_device *device)
584 struct net_device *dev = platform_get_drvdata(device);
585 struct sonic_local* lp = netdev_priv(dev);
587 unregister_netdev (dev);
588 dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode),
589 lp->descriptors, lp->descriptors_laddr);
590 free_netdev (dev);
592 return 0;
595 static struct platform_driver mac_sonic_driver = {
596 .probe = mac_sonic_probe,
597 .remove = __devexit_p(mac_sonic_device_remove),
598 .driver = {
599 .name = mac_sonic_string,
603 static int __init mac_sonic_init_module(void)
605 int err;
607 if ((err = platform_driver_register(&mac_sonic_driver))) {
608 printk(KERN_ERR "Driver registration failed\n");
609 return err;
612 mac_sonic_device = platform_device_alloc(mac_sonic_string, 0);
613 if (!mac_sonic_device) {
614 goto out_unregister;
617 if (platform_device_add(mac_sonic_device)) {
618 platform_device_put(mac_sonic_device);
619 mac_sonic_device = NULL;
622 return 0;
624 out_unregister:
625 driver_unregister(&mac_sonic_driver);
627 return -ENOMEM;
630 static void __exit mac_sonic_cleanup_module(void)
632 platform_driver_unregister(&mac_sonic_driver);
634 if (mac_sonic_device) {
635 platform_device_unregister(mac_sonic_device);
636 mac_sonic_device = NULL;
640 module_init(mac_sonic_init_module);
641 module_exit(mac_sonic_cleanup_module);