nfsmb.c revision 165951 
1#include <sys/cdefs.h>
2__FBSDID("$FreeBSD: head/sys/pci/nfsmb.c 165951 2007-01-11 19:56:24Z jhb $");
3
4#include <sys/param.h>
5#include <sys/bus.h>
6#include <sys/kernel.h>
7#include <sys/lock.h>
8#include <sys/module.h>
9#include <sys/mutex.h>
10#include <sys/systm.h>
11
12#include <machine/bus.h>
13#include <machine/resource.h>
14#include <sys/rman.h>
15
16#include <dev/pci/pcivar.h>
17#include <dev/pci/pcireg.h>
18
19#include <dev/smbus/smbconf.h>
20#include "smbus_if.h"
21
22#define	NFSMB_DEBUG(x)	if (nfsmb_debug) (x)
23
24#ifdef DEBUG
25static int nfsmb_debug = 1;
26#else
27static int nfsmb_debug = 0;
28#endif
29
30/* NVIDIA nForce2/3/4 MCP */
31#define	NFSMB_VENDORID_NVIDIA		0x10de
32#define	NFSMB_DEVICEID_NF2_SMB		0x0064
33#define	NFSMB_DEVICEID_NF2_ULTRA_SMB	0x0084
34#define	NFSMB_DEVICEID_NF3_PRO150_SMB	0x00d4
35#define	NFSMB_DEVICEID_NF3_250GB_SMB	0x00e4
36#define	NFSMB_DEVICEID_NF4_SMB		0x0052
37#define	NFSMB_DEVICEID_NF4_04_SMB	0x0034
38#define	NFSMB_DEVICEID_NF4_51_SMB	0x0264
39#define	NFSMB_DEVICEID_NF4_55_SMB	0x0368
40
41/* PCI Configuration space registers */
42#define	NF2PCI_SMBASE_1		PCIR_BAR(4)
43#define	NF2PCI_SMBASE_2		PCIR_BAR(5)
44
45/*
46 * ACPI 3.0, Chapter 12, SMBus Host Controller Interface.
47 */
48#define	SMB_PRTCL		0x00	/* protocol */
49#define	SMB_STS			0x01	/* status */
50#define	SMB_ADDR		0x02	/* address */
51#define	SMB_CMD			0x03	/* command */
52#define	SMB_DATA		0x04	/* 32 data registers */
53#define	SMB_BCNT		0x24	/* number of data bytes */
54#define	SMB_ALRM_A		0x25	/* alarm address */
55#define	SMB_ALRM_D		0x26	/* 2 bytes alarm data */
56
57#define	SMB_STS_DONE		0x80
58#define	SMB_STS_ALRM		0x40
59#define	SMB_STS_RES		0x20
60#define	SMB_STS_STATUS		0x1f
61#define	SMB_STS_OK		0x00	/* OK */
62#define	SMB_STS_UF		0x07	/* Unknown Failure */
63#define	SMB_STS_DANA		0x10	/* Device Address Not Acknowledged */
64#define	SMB_STS_DED		0x11	/* Device Error Detected */
65#define	SMB_STS_DCAD		0x12	/* Device Command Access Denied */
66#define	SMB_STS_UE		0x13	/* Unknown Error */
67#define	SMB_STS_DAD		0x17	/* Device Access Denied */
68#define	SMB_STS_T		0x18	/* Timeout */
69#define	SMB_STS_HUP		0x19	/* Host Unsupported Protocol */
70#define	SMB_STS_B		0x1A	/* Busy */
71#define	SMB_STS_PEC		0x1F	/* PEC (CRC-8) Error */
72
73#define	SMB_PRTCL_WRITE		0x00
74#define	SMB_PRTCL_READ		0x01
75#define	SMB_PRTCL_QUICK		0x02
76#define	SMB_PRTCL_BYTE		0x04
77#define	SMB_PRTCL_BYTE_DATA	0x06
78#define	SMB_PRTCL_WORD_DATA	0x08
79#define	SMB_PRTCL_BLOCK_DATA	0x0a
80#define	SMB_PRTCL_PROC_CALL	0x0c
81#define	SMB_PRTCL_BLOCK_PROC_CALL 0x0d
82#define	SMB_PRTCL_PEC		0x80
83
84struct nfsmb_softc {
85	int rid;
86	struct resource *res;
87	bus_space_tag_t smbst;
88	bus_space_handle_t smbsh;
89	device_t smbus;
90	device_t subdev;
91	struct mtx lock;
92};
93
94#define	NFSMB_LOCK(nfsmb)		mtx_lock(&(nfsmb)->lock)
95#define	NFSMB_UNLOCK(nfsmb)		mtx_unlock(&(nfsmb)->lock)
96#define	NFSMB_LOCK_ASSERT(nfsmb)	mtx_assert(&(nfsmb)->lock, MA_OWNED)
97
98#define	NFSMB_SMBINB(nfsmb, register)					\
99	(bus_space_read_1(nfsmb->smbst, nfsmb->smbsh, register))
100#define	NFSMB_SMBOUTB(nfsmb, register, value) \
101	(bus_space_write_1(nfsmb->smbst, nfsmb->smbsh, register, value))
102
103static int	nfsmb_detach(device_t dev);
104static int	nfsmbsub_detach(device_t dev);
105
106static int
107nfsmbsub_probe(device_t dev)
108{
109
110	device_set_desc(dev, "nForce2/3/4 MCP SMBus Controller");
111	return (BUS_PROBE_DEFAULT);
112}
113
114static int
115nfsmb_probe(device_t dev)
116{
117	u_int16_t vid;
118	u_int16_t did;
119
120	vid = pci_get_vendor(dev);
121	did = pci_get_device(dev);
122
123	if (vid == NFSMB_VENDORID_NVIDIA) {
124		switch(did) {
125		case NFSMB_DEVICEID_NF2_SMB:
126		case NFSMB_DEVICEID_NF2_ULTRA_SMB:
127		case NFSMB_DEVICEID_NF3_PRO150_SMB:
128		case NFSMB_DEVICEID_NF3_250GB_SMB:
129		case NFSMB_DEVICEID_NF4_SMB:
130		case NFSMB_DEVICEID_NF4_04_SMB:
131		case NFSMB_DEVICEID_NF4_51_SMB:
132		case NFSMB_DEVICEID_NF4_55_SMB:
133			device_set_desc(dev, "nForce2/3/4 MCP SMBus Controller");
134			return (BUS_PROBE_DEFAULT);
135		}
136	}
137
138	return (ENXIO);
139}
140
141static int
142nfsmbsub_attach(device_t dev)
143{
144	device_t parent;
145	struct nfsmb_softc *nfsmbsub_sc = device_get_softc(dev);
146
147	parent = device_get_parent(dev);
148
149	nfsmbsub_sc->rid = NF2PCI_SMBASE_2;
150
151	nfsmbsub_sc->res = bus_alloc_resource_any(parent, SYS_RES_IOPORT,
152	    &nfsmbsub_sc->rid, RF_ACTIVE);
153	if (nfsmbsub_sc->res == NULL) {
154		/* Older incarnations of the device used non-standard BARs. */
155		nfsmbsub_sc->rid = 0x54;
156		nfsmbsub_sc->res = bus_alloc_resource_any(parent,
157		    SYS_RES_IOPORT, &nfsmbsub_sc->rid, RF_ACTIVE);
158		if (nfsmbsub_sc->res == NULL) {
159			device_printf(dev, "could not map i/o space\n");
160			return (ENXIO);
161		}
162	}
163	nfsmbsub_sc->smbst = rman_get_bustag(nfsmbsub_sc->res);
164	nfsmbsub_sc->smbsh = rman_get_bushandle(nfsmbsub_sc->res);
165	mtx_init(&nfsmbsub_sc->lock, device_get_nameunit(dev), "nfsmb",
166	    MTX_DEF);
167
168	nfsmbsub_sc->smbus = device_add_child(dev, "smbus", -1);
169	if (nfsmbsub_sc->smbus == NULL) {
170		nfsmbsub_detach(dev);
171		return (EINVAL);
172	}
173
174	bus_generic_attach(dev);
175
176	return (0);
177}
178
179static int
180nfsmb_attach(device_t dev)
181{
182	struct nfsmb_softc *nfsmb_sc = device_get_softc(dev);
183
184	/* Allocate I/O space */
185	nfsmb_sc->rid = NF2PCI_SMBASE_1;
186
187	nfsmb_sc->res = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
188		&nfsmb_sc->rid, RF_ACTIVE);
189
190	if (nfsmb_sc->res == NULL) {
191		/* Older incarnations of the device used non-standard BARs. */
192		nfsmb_sc->rid = 0x50;
193		nfsmb_sc->res = bus_alloc_resource_any(dev,
194		    SYS_RES_IOPORT, &nfsmb_sc->rid, RF_ACTIVE);
195		if (nfsmb_sc->res == NULL) {
196			device_printf(dev, "could not map i/o space\n");
197			return (ENXIO);
198		}
199	}
200
201	nfsmb_sc->smbst = rman_get_bustag(nfsmb_sc->res);
202	nfsmb_sc->smbsh = rman_get_bushandle(nfsmb_sc->res);
203	mtx_init(&nfsmb_sc->lock, device_get_nameunit(dev), "nfsmb", MTX_DEF);
204
205	/* Allocate a new smbus device */
206	nfsmb_sc->smbus = device_add_child(dev, "smbus", -1);
207	if (!nfsmb_sc->smbus) {
208		nfsmb_detach(dev);
209		return (EINVAL);
210	}
211
212	nfsmb_sc->subdev = NULL;
213	switch (pci_get_device(dev)) {
214	case NFSMB_DEVICEID_NF2_SMB:
215	case NFSMB_DEVICEID_NF2_ULTRA_SMB:
216	case NFSMB_DEVICEID_NF3_PRO150_SMB:
217	case NFSMB_DEVICEID_NF3_250GB_SMB:
218	case NFSMB_DEVICEID_NF4_SMB:
219	case NFSMB_DEVICEID_NF4_04_SMB:
220	case NFSMB_DEVICEID_NF4_51_SMB:
221	case NFSMB_DEVICEID_NF4_55_SMB:
222		/* Trying to add secondary device as slave */
223		nfsmb_sc->subdev = device_add_child(dev, "nfsmb", -1);
224		if (!nfsmb_sc->subdev) {
225			nfsmb_detach(dev);
226			return (EINVAL);
227		}
228		break;
229	default:
230		break;
231	}
232
233	bus_generic_attach(dev);
234
235	return (0);
236}
237
238static int
239nfsmbsub_detach(device_t dev)
240{
241	device_t parent;
242	struct nfsmb_softc *nfsmbsub_sc = device_get_softc(dev);
243
244	parent = device_get_parent(dev);
245
246	if (nfsmbsub_sc->smbus) {
247		device_delete_child(dev, nfsmbsub_sc->smbus);
248		nfsmbsub_sc->smbus = NULL;
249	}
250	mtx_destroy(&nfsmbsub_sc->lock);
251	if (nfsmbsub_sc->res) {
252		bus_release_resource(parent, SYS_RES_IOPORT, nfsmbsub_sc->rid,
253		    nfsmbsub_sc->res);
254		nfsmbsub_sc->res = NULL;
255	}
256	return (0);
257}
258
259static int
260nfsmb_detach(device_t dev)
261{
262	struct nfsmb_softc *nfsmb_sc = device_get_softc(dev);
263
264	if (nfsmb_sc->subdev) {
265		device_delete_child(dev, nfsmb_sc->subdev);
266		nfsmb_sc->subdev = NULL;
267	}
268
269	if (nfsmb_sc->smbus) {
270		device_delete_child(dev, nfsmb_sc->smbus);
271		nfsmb_sc->smbus = NULL;
272	}
273
274	mtx_destroy(&nfsmb_sc->lock);
275	if (nfsmb_sc->res) {
276		bus_release_resource(dev, SYS_RES_IOPORT, nfsmb_sc->rid,
277		    nfsmb_sc->res);
278		nfsmb_sc->res = NULL;
279	}
280
281	return (0);
282}
283
284static int
285nfsmb_callback(device_t dev, int index, void *data)
286{
287	int error = 0;
288
289	switch (index) {
290	case SMB_REQUEST_BUS:
291	case SMB_RELEASE_BUS:
292		break;
293	default:
294		error = EINVAL;
295	}
296
297	return (error);
298}
299
300static int
301nfsmb_wait(struct nfsmb_softc *sc)
302{
303	u_char sts;
304	int error, count;
305
306	NFSMB_LOCK_ASSERT(sc);
307	if (NFSMB_SMBINB(sc, SMB_PRTCL) != 0)
308	{
309		count = 10000;
310		do {
311			DELAY(500);
312		} while (NFSMB_SMBINB(sc, SMB_PRTCL) != 0 && count--);
313		if (count == 0)
314			return (SMB_ETIMEOUT);
315	}
316
317	sts = NFSMB_SMBINB(sc, SMB_STS) & SMB_STS_STATUS;
318	NFSMB_DEBUG(printf("nfsmb: STS=0x%x\n", sts));
319
320	switch (sts) {
321	case SMB_STS_OK:
322		error = SMB_ENOERR;
323		break;
324	case SMB_STS_DANA:
325		error = SMB_ENOACK;
326		break;
327	case SMB_STS_B:
328		error = SMB_EBUSY;
329		break;
330	case SMB_STS_T:
331		error = SMB_ETIMEOUT;
332		break;
333	case SMB_STS_DCAD:
334	case SMB_STS_DAD:
335	case SMB_STS_HUP:
336		error = SMB_ENOTSUPP;
337		break;
338	default:
339		error = SMB_EBUSERR;
340		break;
341	}
342
343	return (error);
344}
345
346static int
347nfsmb_quick(device_t dev, u_char slave, int how)
348{
349	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
350	u_char protocol;
351	int error;
352
353	protocol = SMB_PRTCL_QUICK;
354
355	switch (how) {
356	case SMB_QWRITE:
357		protocol |= SMB_PRTCL_WRITE;
358		NFSMB_DEBUG(printf("nfsmb: QWRITE to 0x%x", slave));
359		break;
360	case SMB_QREAD:
361		protocol |= SMB_PRTCL_READ;
362		NFSMB_DEBUG(printf("nfsmb: QREAD to 0x%x", slave));
363		break;
364	default:
365		panic("%s: unknown QUICK command (%x)!", __func__, how);
366	}
367
368	NFSMB_LOCK(sc);
369	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
370	NFSMB_SMBOUTB(sc, SMB_PRTCL, protocol);
371
372	error = nfsmb_wait(sc);
373
374	NFSMB_DEBUG(printf(", error=0x%x\n", error));
375	NFSMB_UNLOCK(sc);
376
377	return (error);
378}
379
380static int
381nfsmb_sendb(device_t dev, u_char slave, char byte)
382{
383	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
384	int error;
385
386	NFSMB_LOCK(sc);
387	NFSMB_SMBOUTB(sc, SMB_CMD, byte);
388	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
389	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_WRITE | SMB_PRTCL_BYTE);
390
391	error = nfsmb_wait(sc);
392
393	NFSMB_DEBUG(printf("nfsmb: SENDB to 0x%x, byte=0x%x, error=0x%x\n", slave, byte, error));
394	NFSMB_UNLOCK(sc);
395
396	return (error);
397}
398
399static int
400nfsmb_recvb(device_t dev, u_char slave, char *byte)
401{
402	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
403	int error;
404
405	NFSMB_LOCK(sc);
406	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
407	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_READ | SMB_PRTCL_BYTE);
408
409	if ((error = nfsmb_wait(sc)) == SMB_ENOERR)
410		*byte = NFSMB_SMBINB(sc, SMB_DATA);
411
412	NFSMB_DEBUG(printf("nfsmb: RECVB from 0x%x, byte=0x%x, error=0x%x\n", slave, *byte, error));
413	NFSMB_UNLOCK(sc);
414
415	return (error);
416}
417
418static int
419nfsmb_writeb(device_t dev, u_char slave, char cmd, char byte)
420{
421	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
422	int error;
423
424	NFSMB_LOCK(sc);
425	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
426	NFSMB_SMBOUTB(sc, SMB_DATA, byte);
427	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
428	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_WRITE | SMB_PRTCL_BYTE_DATA);
429
430	error = nfsmb_wait(sc);
431
432	NFSMB_DEBUG(printf("nfsmb: WRITEB to 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, byte, error));
433	NFSMB_UNLOCK(sc);
434
435	return (error);
436}
437
438static int
439nfsmb_readb(device_t dev, u_char slave, char cmd, char *byte)
440{
441	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
442	int error;
443
444	NFSMB_LOCK(sc);
445	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
446	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
447	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_READ | SMB_PRTCL_BYTE_DATA);
448
449	if ((error = nfsmb_wait(sc)) == SMB_ENOERR)
450		*byte = NFSMB_SMBINB(sc, SMB_DATA);
451
452	NFSMB_DEBUG(printf("nfsmb: READB from 0x%x, cmd=0x%x, byte=0x%x, error=0x%x\n", slave, cmd, (unsigned char)*byte, error));
453	NFSMB_UNLOCK(sc);
454
455	return (error);
456}
457
458static int
459nfsmb_writew(device_t dev, u_char slave, char cmd, short word)
460{
461	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
462	int error;
463
464	NFSMB_LOCK(sc);
465	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
466	NFSMB_SMBOUTB(sc, SMB_DATA, word);
467	NFSMB_SMBOUTB(sc, SMB_DATA + 1, word >> 8);
468	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
469	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_WRITE | SMB_PRTCL_WORD_DATA);
470
471	error = nfsmb_wait(sc);
472
473	NFSMB_DEBUG(printf("nfsmb: WRITEW to 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, word, error));
474	NFSMB_UNLOCK(sc);
475
476	return (error);
477}
478
479static int
480nfsmb_readw(device_t dev, u_char slave, char cmd, short *word)
481{
482	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
483	int error;
484
485	NFSMB_LOCK(sc);
486	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
487	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
488	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_READ | SMB_PRTCL_WORD_DATA);
489
490	if ((error = nfsmb_wait(sc)) == SMB_ENOERR)
491		*word = NFSMB_SMBINB(sc, SMB_DATA) |
492		    (NFSMB_SMBINB(sc, SMB_DATA + 1) << 8);
493
494	NFSMB_DEBUG(printf("nfsmb: READW from 0x%x, cmd=0x%x, word=0x%x, error=0x%x\n", slave, cmd, (unsigned short)*word, error));
495	NFSMB_UNLOCK(sc);
496
497	return (error);
498}
499
500static int
501nfsmb_bwrite(device_t dev, u_char slave, char cmd, u_char count, char *buf)
502{
503	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
504	u_char i;
505	int error;
506
507	if (count < 1 || count > 32)
508		return (SMB_EINVAL);
509
510	NFSMB_LOCK(sc);
511	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
512	NFSMB_SMBOUTB(sc, SMB_BCNT, count);
513	for (i = 0; i < count; i++)
514		NFSMB_SMBOUTB(sc, SMB_DATA + i, buf[i]);
515	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
516	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_WRITE | SMB_PRTCL_BLOCK_DATA);
517
518	error = nfsmb_wait(sc);
519
520	NFSMB_DEBUG(printf("nfsmb: WRITEBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, count, cmd, error));
521	NFSMB_UNLOCK(sc);
522
523	return (error);
524}
525
526static int
527nfsmb_bread(device_t dev, u_char slave, char cmd, u_char *count, char *buf)
528{
529	struct nfsmb_softc *sc = (struct nfsmb_softc *)device_get_softc(dev);
530	u_char data, len, i;
531	int error;
532
533	if (*count < 1 || *count > 32)
534		return (SMB_EINVAL);
535
536	NFSMB_LOCK(sc);
537	NFSMB_SMBOUTB(sc, SMB_CMD, cmd);
538	NFSMB_SMBOUTB(sc, SMB_ADDR, slave);
539	NFSMB_SMBOUTB(sc, SMB_PRTCL, SMB_PRTCL_READ | SMB_PRTCL_BLOCK_DATA);
540
541	if ((error = nfsmb_wait(sc)) == SMB_ENOERR) {
542		len = NFSMB_SMBINB(sc, SMB_BCNT);
543		for (i = 0; i < len; i++) {
544			data = NFSMB_SMBINB(sc, SMB_DATA + i);
545			if (i < *count)
546				buf[i] = data;
547		}
548		*count = len;
549	}
550
551	NFSMB_DEBUG(printf("nfsmb: READBLK to 0x%x, count=0x%x, cmd=0x%x, error=0x%x", slave, *count, cmd, error));
552	NFSMB_UNLOCK(sc);
553
554	return (error);
555}
556
557static device_method_t nfsmb_methods[] = {
558	/* Device interface */
559	DEVMETHOD(device_probe,		nfsmb_probe),
560	DEVMETHOD(device_attach,	nfsmb_attach),
561	DEVMETHOD(device_detach,	nfsmb_detach),
562
563	/* SMBus interface */
564	DEVMETHOD(smbus_callback,	nfsmb_callback),
565	DEVMETHOD(smbus_quick,		nfsmb_quick),
566	DEVMETHOD(smbus_sendb,		nfsmb_sendb),
567	DEVMETHOD(smbus_recvb,		nfsmb_recvb),
568	DEVMETHOD(smbus_writeb,		nfsmb_writeb),
569	DEVMETHOD(smbus_readb,		nfsmb_readb),
570	DEVMETHOD(smbus_writew,		nfsmb_writew),
571	DEVMETHOD(smbus_readw,		nfsmb_readw),
572	DEVMETHOD(smbus_bwrite,		nfsmb_bwrite),
573	DEVMETHOD(smbus_bread,		nfsmb_bread),
574
575	{ 0, 0 }
576};
577
578static device_method_t nfsmbsub_methods[] = {
579	/* Device interface */
580	DEVMETHOD(device_probe,		nfsmbsub_probe),
581	DEVMETHOD(device_attach,	nfsmbsub_attach),
582	DEVMETHOD(device_detach,	nfsmbsub_detach),
583
584	/* SMBus interface */
585	DEVMETHOD(smbus_callback,	nfsmb_callback),
586	DEVMETHOD(smbus_quick,		nfsmb_quick),
587	DEVMETHOD(smbus_sendb,		nfsmb_sendb),
588	DEVMETHOD(smbus_recvb,		nfsmb_recvb),
589	DEVMETHOD(smbus_writeb,		nfsmb_writeb),
590	DEVMETHOD(smbus_readb,		nfsmb_readb),
591	DEVMETHOD(smbus_writew,		nfsmb_writew),
592	DEVMETHOD(smbus_readw,		nfsmb_readw),
593	DEVMETHOD(smbus_bwrite,		nfsmb_bwrite),
594	DEVMETHOD(smbus_bread,		nfsmb_bread),
595
596	{ 0, 0 }
597};
598
599static devclass_t nfsmb_devclass;
600
601static driver_t nfsmb_driver = {
602	"nfsmb",
603	nfsmb_methods,
604	sizeof(struct nfsmb_softc),
605};
606
607static driver_t nfsmbsub_driver = {
608	"nfsmb",
609	nfsmbsub_methods,
610	sizeof(struct nfsmb_softc),
611};
612
613DRIVER_MODULE(nfsmb, pci, nfsmb_driver, nfsmb_devclass, 0, 0);
614DRIVER_MODULE(nfsmb, nfsmb, nfsmbsub_driver, nfsmb_devclass, 0, 0);
615DRIVER_MODULE(smbus, nfsmb, smbus_driver, smbus_devclass, 0, 0);
616
617MODULE_DEPEND(nfsmb, pci, 1, 1, 1);
618MODULE_DEPEND(nfsmb, smbus, SMBUS_MINVER, SMBUS_PREFVER, SMBUS_MAXVER);
619MODULE_VERSION(nfsmb, 1);
620