xref: /dragonfly/sys/dev/pccard/cardbus/cardbus.c (revision c03f08f3)
1 /*-
2  * Copyright (c) 2003 M. Warner Losh.  All Rights Reserved.
3  * Copyright (c) 2000,2001 Jonathan Chen.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/sys/dev/cardbus/cardbus.c,v 1.28 2002/11/27 17:30:41 imp Exp $
27  * $DragonFly: src/sys/dev/pccard/cardbus/cardbus.c,v 1.11 2007/07/05 12:08:54 sephe Exp $
28  */
29 
30 /*
31  * Cardbus Bus Driver
32  *
33  * much of the bus code was stolen directly from sys/pci/pci.c
34  *   (Copyright (c) 1997, Stefan Esser <se@freebsd.org>)
35  *
36  * Written by Jonathan Chen <jon@freebsd.org>
37  */
38 
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/kernel.h>
44 #include <sys/sysctl.h>
45 
46 #include <sys/bus.h>
47 #include <sys/rman.h>
48 
49 #include <sys/pciio.h>
50 #include <bus/pci/pcivar.h>
51 #include <bus/pci/pcireg.h>
52 #include <bus/pci/pci_private.h>
53 
54 #include <dev/pccard/cardbus/cardbusreg.h>
55 #include <dev/pccard/cardbus/cardbusvar.h>
56 #include <dev/pccard/cardbus/cardbus_cis.h>
57 #include <bus/pccard/pccard_cis.h>
58 #include <bus/pccard/pccardvar.h>
59 
60 #include "power_if.h"
61 #include "pcib_if.h"
62 
63 /* sysctl vars */
64 SYSCTL_NODE(_hw, OID_AUTO, cardbus, CTLFLAG_RD, 0, "CardBus parameters");
65 
66 int    cardbus_debug = 0;
67 TUNABLE_INT("hw.cardbus.debug", &cardbus_debug);
68 SYSCTL_INT(_hw_cardbus, OID_AUTO, debug, CTLFLAG_RW,
69     &cardbus_debug, 0,
70   "CardBus debug");
71 
72 int    cardbus_cis_debug = 0;
73 TUNABLE_INT("hw.cardbus.cis_debug", &cardbus_cis_debug);
74 SYSCTL_INT(_hw_cardbus, OID_AUTO, cis_debug, CTLFLAG_RW,
75     &cardbus_cis_debug, 0,
76   "CardBus CIS debug");
77 
78 #define	DPRINTF(a) if (cardbus_debug) kprintf a
79 #define	DEVPRINTF(x) if (cardbus_debug) device_printf x
80 
81 
82 static void	cardbus_add_map(device_t cbdev, device_t child, int reg);
83 static int	cardbus_alloc_resources(device_t cbdev, device_t child);
84 static int	cardbus_attach(device_t cbdev);
85 static int	cardbus_attach_card(device_t cbdev);
86 static int	cardbus_barsort(const void *a, const void *b);
87 static int	cardbus_detach(device_t cbdev);
88 static int	cardbus_detach_card(device_t cbdev);
89 static void	cardbus_device_setup_regs(device_t brdev, int b, int s, int f,
90 		    pcicfgregs *cfg);
91 static void	cardbus_driver_added(device_t cbdev, driver_t *driver);
92 static void	cardbus_pickup_maps(device_t cbdev, device_t child);
93 static int	cardbus_probe(device_t cbdev);
94 static int	cardbus_read_ivar(device_t cbdev, device_t child, int which,
95 		    uintptr_t *result);
96 static void	cardbus_release_all_resources(device_t cbdev,
97 		    struct cardbus_devinfo *dinfo);
98 static int	cardbus_write_ivar(device_t cbdev, device_t child, int which,
99 		    uintptr_t value);
100 
101 /*
102  * Resource allocation
103  */
104 /*
105  * Adding a memory/io resource (sans CIS)
106  */
107 
108 static void
109 cardbus_add_map(device_t cbdev, device_t child, int reg)
110 {
111 	struct cardbus_devinfo *dinfo = device_get_ivars(child);
112 	struct resource_list_entry *rle;
113 	uint32_t size;
114 	uint32_t testval;
115 	int type;
116 
117 	SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
118 		if (rle->rid == reg)
119 			return;
120 	}
121 
122 	if (reg == CARDBUS_ROM_REG)
123 		testval = CARDBUS_ROM_ADDRMASK;
124 	else
125 		testval = ~0;
126 
127 	pci_write_config(child, reg, testval, 4);
128 	testval = pci_read_config(child, reg, 4);
129 
130 	if (testval == ~0 || testval == 0)
131 		return;
132 
133 	if ((testval & 1) == 0)
134 		type = SYS_RES_MEMORY;
135 	else
136 		type = SYS_RES_IOPORT;
137 
138 	size = CARDBUS_MAPREG_MEM_SIZE(testval);
139 	device_printf(cbdev, "Resource not specified in CIS: id=%x, size=%x\n",
140 	    reg, size);
141 	resource_list_add(&dinfo->pci.resources, type, reg, 0UL, ~0UL, size);
142 }
143 
144 static void
145 cardbus_pickup_maps(device_t cbdev, device_t child)
146 {
147 	struct cardbus_devinfo *dinfo = device_get_ivars(child);
148 	int reg;
149 
150 	/*
151 	 * Try to pick up any resources that was not specified in CIS.
152 	 * Maybe this isn't any longer necessary now that we have fixed
153 	 * CIS parsing and we should filter things here?  XXX
154 	 */
155 	for (reg = 0; reg < dinfo->pci.cfg.nummaps; reg++)
156 		cardbus_add_map(cbdev, child, PCIR_BAR(reg));
157 }
158 
159 static void
160 cardbus_do_res(struct resource_list_entry *rle, device_t child, uint32_t start)
161 {
162 	rle->start = start;
163 	rle->end = start + rle->count - 1;
164 	pci_write_config(child, rle->rid, rle->start, 4);
165 }
166 
167 static int
168 cardbus_barsort(const void *a, const void *b)
169 {
170 	return ((*(const struct resource_list_entry * const *)b)->count -
171 	    (*(const struct resource_list_entry * const *)a)->count);
172 }
173 
174 /* XXX this function is too long */
175 static int
176 cardbus_alloc_resources(device_t cbdev, device_t child)
177 {
178 	struct cardbus_devinfo *dinfo = device_get_ivars(child);
179 	int count;
180 	struct resource_list_entry *rle;
181 	struct resource_list_entry **barlist;
182 	int tmp;
183 	uint32_t mem_psize = 0, mem_nsize = 0, io_size = 0;
184 	struct resource *res;
185 	uint32_t start,end;
186 	int rid, flags;
187 
188 	count = 0;
189 	SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
190 		count++;
191 	}
192 	if (count == 0)
193 		return (0);
194 	barlist = kmalloc(sizeof(struct resource_list_entry*) * count, M_DEVBUF,
195 	    M_WAITOK);
196 	count = 0;
197 	SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
198 		barlist[count] = rle;
199 		if (rle->type == SYS_RES_IOPORT) {
200 			io_size += rle->count;
201 		} else if (rle->type == SYS_RES_MEMORY) {
202 			if (dinfo->mprefetchable & BARBIT(rle->rid))
203 				mem_psize += rle->count;
204 			else
205 				mem_nsize += rle->count;
206 		}
207 		count++;
208 	}
209 
210 	/*
211 	 * We want to allocate the largest resource first, so that our
212 	 * allocated memory is packed.
213 	 */
214 	kqsort(barlist, count, sizeof(struct resource_list_entry *),
215 	    cardbus_barsort);
216 
217 	/* Allocate prefetchable memory */
218 	flags = 0;
219 	for (tmp = 0; tmp < count; tmp++) {
220 		rle = barlist[tmp];
221 		if (rle->res == NULL &&
222 		    rle->type == SYS_RES_MEMORY &&
223 		    dinfo->mprefetchable & BARBIT(rle->rid)) {
224 			flags = rman_make_alignment_flags(rle->count);
225 			break;
226 		}
227 	}
228 	if (flags > 0) { /* If any prefetchable memory is requested... */
229 		/*
230 		 * First we allocate one big space for all resources of this
231 		 * type.  We do this because our parent, pccbb, needs to open
232 		 * a window to forward all addresses within the window, and
233 		 * it would be best if nobody else has resources allocated
234 		 * within the window.
235 		 * (XXX: Perhaps there might be a better way to do this?)
236 		 */
237 		rid = 0;
238 		res = bus_alloc_resource(cbdev, SYS_RES_MEMORY, &rid, 0,
239 		    (dinfo->mprefetchable & dinfo->mbelow1mb)?0xFFFFF:~0UL,
240 		    mem_psize, flags);
241 		if (res == NULL) {
242 			device_printf(cbdev,
243 			    "Can't get memory for prefetch mem\n");
244 			kfree(barlist, M_DEVBUF);
245 			return (EIO);
246 		}
247 		start = rman_get_start(res);
248 		end = rman_get_end(res);
249 		DEVPRINTF((cbdev, "Prefetchable memory at %x-%x\n", start, end));
250 		/*
251 		 * Now that we know the region is free, release it and hand it
252 		 * out piece by piece.
253 		 */
254 		bus_release_resource(cbdev, SYS_RES_MEMORY, rid, res);
255 		for (tmp = 0; tmp < count; tmp++) {
256 			rle = barlist[tmp];
257 			if (rle->type == SYS_RES_MEMORY &&
258 			    dinfo->mprefetchable & BARBIT(rle->rid)) {
259 				cardbus_do_res(rle, child, start);
260 				start += rle->count;
261 			}
262 		}
263 	}
264 
265 	/* Allocate non-prefetchable memory */
266 	flags = 0;
267 	for (tmp = 0; tmp < count; tmp++) {
268 		rle = barlist[tmp];
269 		if (rle->type == SYS_RES_MEMORY &&
270 		    (dinfo->mprefetchable & BARBIT(rle->rid)) == 0) {
271 			flags = rman_make_alignment_flags(rle->count);
272 			break;
273 		}
274 	}
275 	if (flags > 0) { /* If any non-prefetchable memory is requested... */
276 		/*
277 		 * First we allocate one big space for all resources of this
278 		 * type.  We do this because our parent, pccbb, needs to open
279 		 * a window to forward all addresses within the window, and
280 		 * it would be best if nobody else has resources allocated
281 		 * within the window.
282 		 * (XXX: Perhaps there might be a better way to do this?)
283 		 */
284 		rid = 0;
285 		res = bus_alloc_resource(cbdev, SYS_RES_MEMORY, &rid, 0,
286 		    ((~dinfo->mprefetchable) & dinfo->mbelow1mb)?0xFFFFF:~0UL,
287 		    mem_nsize, flags);
288 		if (res == NULL) {
289 			device_printf(cbdev,
290 			    "Can't get memory for non-prefetch mem\n");
291 			kfree(barlist, M_DEVBUF);
292 			return (EIO);
293 		}
294 		start = rman_get_start(res);
295 		end = rman_get_end(res);
296 		DEVPRINTF((cbdev, "Non-prefetchable memory at %x-%x\n",
297 		    start, end));
298 		/*
299 		 * Now that we know the region is free, release it and hand it
300 		 * out piece by piece.
301 		 */
302 		bus_release_resource(cbdev, SYS_RES_MEMORY, rid, res);
303 		for (tmp = 0; tmp < count; tmp++) {
304 			rle = barlist[tmp];
305 			if (rle->type == SYS_RES_MEMORY &&
306 			    (dinfo->mprefetchable & BARBIT(rle->rid)) == 0) {
307 				cardbus_do_res(rle, child, start);
308 				start += rle->count;
309 			}
310 		}
311 	}
312 
313 	/* Allocate IO ports */
314 	flags = 0;
315 	for (tmp = 0; tmp < count; tmp++) {
316 		rle = barlist[tmp];
317 		if (rle->type == SYS_RES_IOPORT) {
318 			flags = rman_make_alignment_flags(rle->count);
319 			break;
320 		}
321 	}
322 	if (flags > 0) { /* If any IO port is requested... */
323 		/*
324 		 * First we allocate one big space for all resources of this
325 		 * type.  We do this because our parent, pccbb, needs to open
326 		 * a window to forward all addresses within the window, and
327 		 * it would be best if nobody else has resources allocated
328 		 * within the window.
329 		 * (XXX: Perhaps there might be a better way to do this?)
330 		 */
331 		rid = 0;
332 		res = bus_alloc_resource(cbdev, SYS_RES_IOPORT, &rid, 0,
333 		    (dinfo->ibelow1mb)?0xFFFFF:~0UL, io_size, flags);
334 		if (res == NULL) {
335 			device_printf(cbdev,
336 			    "Can't get memory for IO ports\n");
337 			kfree(barlist, M_DEVBUF);
338 			return (EIO);
339 		}
340 		start = rman_get_start(res);
341 		end = rman_get_end(res);
342 		DEVPRINTF((cbdev, "IO port at %x-%x\n", start, end));
343 		/*
344 		 * Now that we know the region is free, release it and hand it
345 		 * out piece by piece.
346 		 */
347 		bus_release_resource(cbdev, SYS_RES_IOPORT, rid, res);
348 		for (tmp = 0; tmp < count; tmp++) {
349 			rle = barlist[tmp];
350 			if (rle->type == SYS_RES_IOPORT) {
351 				cardbus_do_res(rle, child, start);
352 				start += rle->count;
353 			}
354 		}
355 	}
356 
357 	/* Allocate IRQ */
358 	rid = 0;
359 	res = bus_alloc_resource_any(cbdev, SYS_RES_IRQ, &rid, RF_SHAREABLE);
360 	if (res == NULL) {
361 		device_printf(cbdev, "Can't get memory for irq\n");
362 		kfree(barlist, M_DEVBUF);
363 		return (EIO);
364 	}
365 	start = rman_get_start(res);
366 	end = rman_get_end(res);
367 	bus_release_resource(cbdev, SYS_RES_IRQ, rid, res);
368 	resource_list_add(&dinfo->pci.resources, SYS_RES_IRQ, rid, start, end,
369 	    1);
370 	dinfo->pci.cfg.intline = rman_get_start(res);
371 	pci_write_config(child, PCIR_INTLINE, rman_get_start(res), 1);
372 
373 	kfree(barlist, M_DEVBUF);
374 	return (0);
375 }
376 
377 /************************************************************************/
378 /* Probe/Attach								*/
379 /************************************************************************/
380 
381 static int
382 cardbus_probe(device_t cbdev)
383 {
384 	device_set_desc(cbdev, "CardBus bus");
385 	return 0;
386 }
387 
388 static int
389 cardbus_attach(device_t cbdev)
390 {
391 	return 0;
392 }
393 
394 static int
395 cardbus_detach(device_t cbdev)
396 {
397 	cardbus_detach_card(cbdev);
398 	return 0;
399 }
400 
401 static int
402 cardbus_suspend(device_t self)
403 {
404 	cardbus_detach_card(self);
405 	return (0);
406 }
407 
408 static int
409 cardbus_resume(device_t self)
410 {
411 	return (0);
412 }
413 
414 /************************************************************************/
415 /* Attach/Detach card							*/
416 /************************************************************************/
417 
418 static void
419 cardbus_device_setup_regs(device_t brdev, int b, int s, int f, pcicfgregs *cfg)
420 {
421 	PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_INTLINE,
422 	    pci_get_irq(device_get_parent(brdev)), 1);
423 	cfg->intline = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_INTLINE, 1);
424 
425 	PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 0x08, 1);
426 	cfg->cachelnsz = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_CACHELNSZ, 1);
427 
428 	PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 0xa8, 1);
429 	cfg->lattimer = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_LATTIMER, 1);
430 
431 	PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MINGNT, 0x14, 1);
432 	cfg->mingnt = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MINGNT, 1);
433 
434 	PCIB_WRITE_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 0x14, 1);
435 	cfg->maxlat = PCIB_READ_CONFIG(brdev, b, s, f, PCIR_MAXLAT, 1);
436 }
437 
438 static int
439 cardbus_attach_card(device_t cbdev)
440 {
441 	device_t brdev = device_get_parent(cbdev);
442 	device_t child;
443 	int cardattached = 0;
444 	int bus, slot, func;
445 
446 	cardbus_detach_card(cbdev); /* detach existing cards */
447 	POWER_ENABLE_SOCKET(brdev, cbdev);
448 	bus = pcib_get_bus(brdev);
449 	/* For each function, set it up and try to attach a driver to it */
450 	for (slot = 0; slot <= CARDBUS_SLOTMAX; slot++) {
451 		int cardbusfunchigh = 0;
452 		for (func = 0; func <= cardbusfunchigh; func++) {
453 			struct cardbus_devinfo *dinfo;
454 
455 			dinfo = (struct cardbus_devinfo *)
456 			    pci_read_device(brdev, bus, slot, func,
457 				sizeof(struct cardbus_devinfo));
458 			if (dinfo == NULL)
459 				continue;
460 			if (dinfo->pci.cfg.mfdev)
461 				cardbusfunchigh = CARDBUS_FUNCMAX;
462 
463 			cardbus_device_setup_regs(brdev, bus, slot, func,
464 			    &dinfo->pci.cfg);
465 			child = device_add_child(cbdev, NULL, -1);
466 			if (child == NULL) {
467 				DEVPRINTF((cbdev, "Cannot add child!\n"));
468 				pci_freecfg((struct pci_devinfo *)dinfo);
469 				continue;
470 			}
471 			dinfo->pci.cfg.dev = child;
472 			resource_list_init(&dinfo->pci.resources);
473 			device_set_ivars(child, dinfo);
474 			if (cardbus_do_cis(cbdev, child) != 0) {
475 				DEVPRINTF((cbdev, "Can't parse cis\n"));
476 				pci_freecfg((struct pci_devinfo *)dinfo);
477 				continue;
478 			}
479 			cardbus_pickup_maps(cbdev, child);
480 			cardbus_alloc_resources(cbdev, child);
481 			pci_print_verbose(&dinfo->pci);
482 			if (device_probe_and_attach(child) != 0)
483 				cardbus_release_all_resources(cbdev, dinfo);
484 			else
485 				cardattached++;
486 		}
487 	}
488 
489 	if (cardattached > 0)
490 		return (0);
491 	POWER_DISABLE_SOCKET(brdev, cbdev);
492 	return (ENOENT);
493 }
494 
495 static int
496 cardbus_detach_card(device_t cbdev)
497 {
498 	int numdevs;
499 	device_t *devlist;
500 	int tmp;
501 	int err = 0;
502 
503 	device_get_children(cbdev, &devlist, &numdevs);
504 
505 	if (numdevs == 0) {
506 		kfree(devlist, M_TEMP);
507 		return (ENOENT);
508 	}
509 
510 	for (tmp = 0; tmp < numdevs; tmp++) {
511 		struct cardbus_devinfo *dinfo = device_get_ivars(devlist[tmp]);
512 		int status = device_get_state(devlist[tmp]);
513 
514 		if (dinfo->pci.cfg.dev != devlist[tmp])
515 			device_printf(cbdev, "devinfo dev mismatch\n");
516 		if (status == DS_ATTACHED || status == DS_BUSY)
517 			device_detach(devlist[tmp]);
518 		cardbus_release_all_resources(cbdev, dinfo);
519 		device_delete_child(cbdev, devlist[tmp]);
520 		pci_freecfg((struct pci_devinfo *)dinfo);
521 	}
522 	POWER_DISABLE_SOCKET(device_get_parent(cbdev), cbdev);
523 	kfree(devlist, M_TEMP);
524 	return (err);
525 }
526 
527 static void
528 cardbus_driver_added(device_t cbdev, driver_t *driver)
529 {
530 	int numdevs;
531 	device_t *devlist;
532 	device_t dev;
533 	int i;
534 	struct cardbus_devinfo *dinfo;
535 
536 	DEVICE_IDENTIFY(driver, cbdev);
537 	device_get_children(cbdev, &devlist, &numdevs);
538 	/*
539 	 * If there are no drivers attached, but there are children,
540 	 * then power the card up.
541 	 */
542 	for (i = 0; i < numdevs; i++) {
543 		dev = devlist[i];
544 		if (device_get_state(dev) != DS_NOTPRESENT)
545 		    break;
546 	}
547 	if (i > 0 && i == numdevs)
548 		POWER_ENABLE_SOCKET(device_get_parent(cbdev), cbdev);
549 	for (i = 0; i < numdevs; i++) {
550 		dev = devlist[i];
551 		if (device_get_state(dev) != DS_NOTPRESENT)
552 			continue;
553 		dinfo = device_get_ivars(dev);
554 		pci_print_verbose(&dinfo->pci);
555 		resource_list_init(&dinfo->pci.resources);
556 		cardbus_do_cis(cbdev, dev);
557 		cardbus_pickup_maps(cbdev, dev);
558 		cardbus_alloc_resources(cbdev, dev);
559 		if (device_probe_and_attach(dev) != 0)
560 			cardbus_release_all_resources(cbdev, dinfo);
561 	}
562 	kfree(devlist, M_TEMP);
563 }
564 
565 static void
566 cardbus_release_all_resources(device_t cbdev, struct cardbus_devinfo *dinfo)
567 {
568 	struct resource_list_entry *rle;
569 
570 	/* Free all allocated resources */
571 	SLIST_FOREACH(rle, &dinfo->pci.resources, link) {
572 		if (rle->res) {
573 			if (rman_get_device(rle->res) != cbdev)
574 				device_printf(cbdev, "release_all_resource: "
575 				    "Resource still owned by child, oops. "
576 				    "(type=%d, rid=%d, addr=%lx)\n",
577 				    rle->type, rle->rid,
578 				    rman_get_start(rle->res));
579 			BUS_RELEASE_RESOURCE(device_get_parent(cbdev),
580 			    cbdev, rle->type, rle->rid, rle->res);
581 			rle->res = NULL;
582 			/*
583 			 * zero out config so the card won't acknowledge
584 			 * access to the space anymore
585 			 */
586 			pci_write_config(dinfo->pci.cfg.dev, rle->rid, 0, 4);
587 		}
588 	}
589 	resource_list_free(&dinfo->pci.resources);
590 }
591 
592 /************************************************************************/
593 /* Other Bus Methods							*/
594 /************************************************************************/
595 
596 static int
597 cardbus_read_ivar(device_t cbdev, device_t child, int which, uintptr_t *result)
598 {
599 	struct cardbus_devinfo *dinfo;
600 	pcicfgregs *cfg;
601 
602 	dinfo = device_get_ivars(child);
603 	cfg = &dinfo->pci.cfg;
604 
605 	switch (which) {
606 	case PCI_IVAR_ETHADDR:
607 		/*
608 		 * The generic accessor doesn't deal with failure, so
609 		 * we set the return value, then return an error.
610 		 */
611 		if (dinfo->fepresent & (1 << PCCARD_TPLFE_TYPE_LAN_NID)) {
612 			*((uint8_t **) result) = dinfo->funce.lan.nid;
613 			break;
614 		}
615 		*((uint8_t **) result) = NULL;
616 		return (EINVAL);
617 	default:
618 		return (pci_read_ivar(cbdev, child, which, result));
619 	}
620 	return 0;
621 }
622 
623 static int
624 cardbus_write_ivar(device_t cbdev, device_t child, int which, uintptr_t value)
625 {
626 	return(pci_write_ivar(cbdev, child, which, value));
627 }
628 
629 static device_method_t cardbus_methods[] = {
630 	/* Device interface */
631 	DEVMETHOD(device_probe,		cardbus_probe),
632 	DEVMETHOD(device_attach,	cardbus_attach),
633 	DEVMETHOD(device_detach,	cardbus_detach),
634 	DEVMETHOD(device_suspend,	cardbus_suspend),
635 	DEVMETHOD(device_resume,	cardbus_resume),
636 
637 	/* Bus interface */
638 	DEVMETHOD(bus_read_ivar,	cardbus_read_ivar),
639 	DEVMETHOD(bus_write_ivar,	cardbus_write_ivar),
640 	DEVMETHOD(bus_driver_added,	cardbus_driver_added),
641 
642 	/* Card Interface */
643 	DEVMETHOD(card_attach_card,	cardbus_attach_card),
644 	DEVMETHOD(card_detach_card,	cardbus_detach_card),
645 
646 	{0,0}
647 };
648 
649 DECLARE_CLASS(pci_driver);
650 DEFINE_CLASS_1(cardbus, cardbus_driver, cardbus_methods, 0, pci_driver);
651 
652 static devclass_t cardbus_devclass;
653 
654 DRIVER_MODULE(cardbus, cbb, cardbus_driver, cardbus_devclass, 0, 0);
655 MODULE_VERSION(cardbus, 1);
656