eisaconf.c revision 49360 
1/*
2 * EISA bus probe and attach routines
3 *
4 * Copyright (c) 1995, 1996 Justin T. Gibbs.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice immediately at the beginning of the file, without modification,
12 *    this list of conditions, and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	$Id: eisaconf.c,v 1.49 1999/07/30 13:54:00 mdodd Exp $
32 */
33
34#include "opt_eisa.h"
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/queue.h>
39#include <sys/malloc.h>
40#include <sys/kernel.h>
41#include <sys/module.h>
42#include <sys/bus.h>
43
44#include <machine/limits.h>
45#include <machine/bus.h>
46#include <machine/resource.h>
47#include <sys/rman.h>
48
49#include <i386/eisa/eisaconf.h>
50
51#include <sys/interrupt.h>
52
53typedef struct resvaddr {
54        u_long	addr;				/* start address */
55        u_long	size;				/* size of reserved area */
56	int	flags;
57	struct resource *res;			/* resource manager handle */
58	LIST_ENTRY(resvaddr) links;		/* List links */
59} resvaddr_t;
60
61LIST_HEAD(resvlist, resvaddr);
62
63struct irq_node {
64	int	irq_no;
65	int	irq_trigger;
66	void	*idesc;
67	TAILQ_ENTRY(irq_node) links;
68};
69
70TAILQ_HEAD(irqlist, irq_node);
71
72struct eisa_ioconf {
73	int		slot;
74	struct resvlist	ioaddrs;	/* list of reserved I/O ranges */
75	struct resvlist maddrs;		/* list of reserved memory ranges */
76	struct irqlist	irqs;		/* list of reserved irqs */
77};
78
79/* To be replaced by the "super device" generic device structure... */
80struct eisa_device {
81	eisa_id_t		id;
82	struct eisa_ioconf	ioconf;
83};
84
85
86/* Global variable, so UserConfig can change it. */
87#define MAX_COL		79
88#ifndef EISA_SLOTS
89#define EISA_SLOTS 10   /* PCI clashes with higher ones.. fix later */
90#endif
91int num_eisa_slots = EISA_SLOTS;
92
93static devclass_t eisa_devclass;
94
95static void eisa_reg_print (device_t, char *, char *, int *);
96static struct irq_node * eisa_find_irq(struct eisa_device *e_dev, int rid);
97static struct resvaddr * eisa_find_maddr(struct eisa_device *e_dev, int rid);
98static struct resvaddr * eisa_find_ioaddr(struct eisa_device *e_dev, int rid);
99
100static int
101mainboard_probe(device_t dev)
102{
103	char *idstring;
104	eisa_id_t id = eisa_get_id(dev);
105
106	if (eisa_get_slot(dev) != 0)
107		return (ENXIO);
108
109	idstring = (char *)malloc(8 + sizeof(" (System Board)") + 1,
110				  M_DEVBUF, M_NOWAIT);
111	if (idstring == NULL) {
112		panic("Eisa probe unable to malloc");
113	}
114	sprintf(idstring, "%c%c%c%03x%01x (System Board)",
115		EISA_MFCTR_CHAR0(id),
116		EISA_MFCTR_CHAR1(id),
117		EISA_MFCTR_CHAR2(id),
118		EISA_PRODUCT_ID(id),
119		EISA_REVISION_ID(id));
120	device_set_desc(dev, idstring);
121
122	return (0);
123}
124
125static int
126mainboard_attach(device_t dev)
127{
128	return (0);
129}
130
131static device_method_t mainboard_methods[] = {
132	/* Device interface */
133	DEVMETHOD(device_probe,		mainboard_probe),
134	DEVMETHOD(device_attach,	mainboard_attach),
135
136	{ 0, 0 }
137};
138
139static driver_t mainboard_driver = {
140	"mainboard",
141	mainboard_methods,
142	1,
143};
144
145static devclass_t mainboard_devclass;
146
147DRIVER_MODULE(mainboard, eisa, mainboard_driver, mainboard_devclass, 0, 0);
148
149/*
150** probe for EISA devices
151*/
152static int
153eisa_probe(device_t dev)
154{
155	int i,slot;
156	struct eisa_device *e_dev;
157	int eisaBase = 0xc80;
158	eisa_id_t eisa_id;
159	int devices_found = 0;
160
161	device_set_desc(dev, "EISA bus");
162
163	for (slot = 0; slot < num_eisa_slots; eisaBase+=0x1000, slot++) {
164		int id_size = sizeof(eisa_id);
165		eisa_id = 0;
166    		for( i = 0; i < id_size; i++ ) {
167			outb(eisaBase,0x80 + i); /*Some cards require priming*/
168			eisa_id |= inb(eisaBase+i) << ((id_size-i-1)*CHAR_BIT);
169		}
170		if (eisa_id & 0x80000000)
171			continue;  /* no EISA card in slot */
172
173		devices_found++;
174
175		/* Prepare an eisa_device_node for this slot */
176		e_dev = (struct eisa_device *)malloc(sizeof(*e_dev),
177						     M_DEVBUF, M_NOWAIT);
178		if (!e_dev) {
179			device_printf(dev, "cannot malloc eisa_device");
180			break; /* Try to attach what we have already */
181		}
182		bzero(e_dev, sizeof(*e_dev));
183
184		e_dev->id = eisa_id;
185
186		e_dev->ioconf.slot = slot;
187
188		/* Initialize our lists of reserved addresses */
189		LIST_INIT(&(e_dev->ioconf.ioaddrs));
190		LIST_INIT(&(e_dev->ioconf.maddrs));
191		TAILQ_INIT(&(e_dev->ioconf.irqs));
192
193		device_add_child(dev, NULL, -1, e_dev);
194	}
195
196	/*
197	 * EISA busses themselves are not easily detectable, the easiest way
198	 * to tell if there is an eisa bus is if we found something - there
199	 * should be a motherboard "card" there somewhere.
200	 */
201	return devices_found ? 0 : ENXIO;
202}
203
204static void
205eisa_probe_nomatch(device_t dev, device_t child)
206{
207	u_int32_t	eisa_id = eisa_get_id(child);
208	u_int8_t	slot = eisa_get_slot(child);
209
210	device_printf(dev, "unknown card %c%c%c%03x%01x (0x%08x) at slot %d\n",
211		EISA_MFCTR_CHAR0(eisa_id),
212		EISA_MFCTR_CHAR1(eisa_id),
213		EISA_MFCTR_CHAR2(eisa_id),
214		EISA_PRODUCT_ID(eisa_id),
215		EISA_REVISION_ID(eisa_id),
216		eisa_id,
217		slot);
218
219	return;
220}
221
222static void
223eisa_reg_print (dev, string, separator, column)
224	device_t	dev;
225	char *		string;
226	char *		separator;
227	int *		column;
228{
229	int length = strlen(string);
230
231	length += (separator ? 2 : 1);
232
233	if (((*column) + length) >= MAX_COL) {
234		printf("\n");
235		(*column) = 0;
236	} else if ((*column) != 0) {
237		if (separator) {
238			printf("%c", *separator);
239			(*column)++;
240		}
241		printf(" ");
242		(*column)++;
243	}
244
245	if ((*column) == 0) {
246		(*column) += device_printf(dev, "%s", string);
247	} else {
248		(*column) += printf("%s", string);
249	}
250
251	return;
252}
253
254static int
255eisa_print_child(device_t dev, device_t child)
256{
257	char			buf[81];
258	struct eisa_device *	e_dev = device_get_ivars(child);
259	int			rid;
260	int			irq;
261	struct resvaddr *	resv;
262	char			separator = ',';
263	int			column = 0;
264	int			retval = 0;
265
266	if (device_get_desc(child)) {
267		snprintf(buf, sizeof(buf), "<%s>", device_get_desc(child));
268		eisa_reg_print(child, buf, NULL, &column);
269	}
270
271	rid = 0;
272	while ((resv = eisa_find_ioaddr(e_dev, rid++))) {
273		if ((resv->size == 1) ||
274		    (resv->flags & RESVADDR_BITMASK)) {
275			snprintf(buf, sizeof(buf), "%s%lx",
276				((rid == 1) ? "at 0x" : "0x"),
277				resv->addr);
278		} else {
279			snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
280				((rid == 1) ? "at 0x" : "0x"),
281				resv->addr,
282				(resv->addr + (resv->size - 1)));
283		}
284		eisa_reg_print(child, buf,
285			((rid == 2) ? &separator : NULL), &column);
286	}
287
288	rid = 0;
289	while ((resv = eisa_find_maddr(e_dev, rid++))) {
290		if ((resv->size == 1) ||
291		    (resv->flags & RESVADDR_BITMASK)) {
292			snprintf(buf, sizeof(buf), "%s%lx",
293				((rid == 1) ? "at 0x" : "0x"),
294				resv->addr);
295		} else {
296			snprintf(buf, sizeof(buf), "%s%lx-0x%lx",
297				((rid == 1) ? "at 0x" : "0x"),
298				resv->addr,
299				(resv->addr + (resv->size - 1)));
300		}
301		eisa_reg_print(child, buf,
302			((rid == 2) ? &separator : NULL), &column);
303	}
304
305	rid = 0;
306	while ((irq = eisa_find_irq(e_dev, rid++)) != NULL) {
307		snprintf(buf, sizeof(buf), "irq %d (%s)", irq->irq_no,
308			 (irq->irq_trigger ? "level" : "edge"));
309		eisa_reg_print(child, buf,
310			((rid == 1) ? &separator : NULL), &column);
311	}
312
313	snprintf(buf, sizeof(buf), "on %s slot %d\n",
314		device_get_nameunit(dev), eisa_get_slot(child));
315	eisa_reg_print(child, buf, NULL, &column);
316
317	return (retval);
318}
319
320static struct irq_node *
321eisa_find_irq(struct eisa_device *e_dev, int rid)
322{
323	int i;
324	struct irq_node *irq;
325
326	for (i = 0, irq = TAILQ_FIRST(&e_dev->ioconf.irqs);
327	     i < rid && irq;
328	     i++, irq = TAILQ_NEXT(irq, links))
329		;
330
331	if (irq)
332		return (irq);
333	else
334		return (NULL);
335}
336
337static struct resvaddr *
338eisa_find_maddr(struct eisa_device *e_dev, int rid)
339{
340	int i;
341	struct resvaddr *resv;
342
343	for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.maddrs);
344	     i < rid && resv;
345	     i++, resv = LIST_NEXT(resv, links))
346		;
347
348	return resv;
349}
350
351static struct resvaddr *
352eisa_find_ioaddr(struct eisa_device *e_dev, int rid)
353{
354	int i;
355	struct resvaddr *resv;
356
357	for (i = 0, resv = LIST_FIRST(&e_dev->ioconf.ioaddrs);
358	     i < rid && resv;
359	     i++, resv = LIST_NEXT(resv, links))
360		;
361
362	return resv;
363}
364
365static int
366eisa_read_ivar(device_t dev, device_t child, int which, u_long *result)
367{
368	struct eisa_device *e_dev = device_get_ivars(child);
369	struct irq_node *irq;
370
371	switch (which) {
372	case EISA_IVAR_SLOT:
373		*result = e_dev->ioconf.slot;
374		break;
375
376	case EISA_IVAR_ID:
377		*result = e_dev->id;
378		break;
379
380	case EISA_IVAR_IRQ:
381		/* XXX only first irq */
382		if ((irq = eisa_find_irq(e_dev, 0)) != NULL) {
383			*result = irq->irq_no;
384		} else {
385			*result = -1;
386		}
387		break;
388
389	default:
390		return (ENOENT);
391	}
392
393	return (0);
394}
395
396static int
397eisa_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
398{
399	return (EINVAL);
400}
401
402static struct resource *
403eisa_alloc_resource(device_t dev, device_t child, int type, int *rid,
404		    u_long start, u_long end, u_long count, u_int flags)
405{
406	int isdefault;
407	struct eisa_device *e_dev = device_get_ivars(child);
408	struct resource *rv, **rvp = 0;
409
410	isdefault = (device_get_parent(child) == dev
411		     && start == 0UL && end == ~0UL && count == 1);
412
413	switch (type) {
414	case SYS_RES_IRQ:
415		if (isdefault) {
416			struct irq_node * irq = eisa_find_irq(e_dev, *rid);
417			if (irq == NULL)
418				return 0;
419			start = end = irq->irq_no;
420			count = 1;
421			if (irq->irq_trigger == EISA_TRIGGER_LEVEL) {
422				flags |= RF_SHAREABLE;
423			} else {
424				flags &= ~RF_SHAREABLE;
425			}
426		}
427		break;
428
429	case SYS_RES_MEMORY:
430		if (isdefault) {
431			struct resvaddr *resv;
432
433			resv = eisa_find_maddr(e_dev, *rid);
434			if (!resv)
435				return 0;
436
437			start = resv->addr;
438			end = resv->addr + (resv->size - 1);
439			count = resv->size;
440			rvp = &resv->res;
441		}
442		break;
443
444	case SYS_RES_IOPORT:
445		if (isdefault) {
446			struct resvaddr *resv;
447
448			resv = eisa_find_ioaddr(e_dev, *rid);
449			if (!resv)
450				return 0;
451
452			start = resv->addr;
453			end = resv->addr + (resv->size - 1);
454			count = resv->size;
455			rvp = &resv->res;
456		}
457		break;
458
459	default:
460		return 0;
461	}
462
463	rv = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
464				 type, rid, start, end, count, flags);
465	if (rvp)
466		*rvp = rv;
467
468	return rv;
469}
470
471static int
472eisa_release_resource(device_t dev, device_t child, int type, int rid,
473		      struct resource *r)
474{
475	int rv;
476	struct eisa_device *e_dev = device_get_ivars(child);
477	struct resvaddr *resv = 0;
478
479	switch (type) {
480	case SYS_RES_IRQ:
481		if (eisa_find_irq(e_dev, rid) == NULL)
482			return EINVAL;
483		break;
484
485	case SYS_RES_MEMORY:
486		if (device_get_parent(child) == dev)
487			resv = eisa_find_maddr(e_dev, rid);
488		break;
489
490
491	case SYS_RES_IOPORT:
492		if (device_get_parent(child) == dev)
493			resv = eisa_find_ioaddr(e_dev, rid);
494		break;
495
496	default:
497		return (ENOENT);
498	}
499
500	rv = BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type, rid, r);
501
502	if (rv == 0) {
503		if (resv)
504			resv->res = 0;
505	}
506
507	return rv;
508}
509
510int
511eisa_add_intr(device_t dev, int irq, int trigger)
512{
513	struct eisa_device *e_dev = device_get_ivars(dev);
514	struct irq_node *irq_info;
515
516	irq_info = (struct irq_node *)malloc(sizeof(*irq_info), M_DEVBUF,
517					     M_NOWAIT);
518	if (irq_info == NULL)
519		return (1);
520
521	irq_info->irq_no = irq;
522	irq_info->irq_trigger = trigger;
523	irq_info->idesc = NULL;
524	TAILQ_INSERT_TAIL(&e_dev->ioconf.irqs, irq_info, links);
525	return 0;
526}
527
528static int
529eisa_add_resvaddr(struct eisa_device *e_dev, struct resvlist *head, u_long base,
530		  u_long size, int flags)
531{
532	resvaddr_t *reservation;
533
534	reservation = (resvaddr_t *)malloc(sizeof(resvaddr_t),
535					   M_DEVBUF, M_NOWAIT);
536	if(!reservation)
537		return (ENOMEM);
538
539	reservation->addr = base;
540	reservation->size = size;
541	reservation->flags = flags;
542
543	if (!head->lh_first) {
544		LIST_INSERT_HEAD(head, reservation, links);
545	}
546	else {
547		resvaddr_t *node;
548		for(node = head->lh_first; node; node = node->links.le_next) {
549			if (node->addr > reservation->addr) {
550				/*
551				 * List is sorted in increasing
552				 * address order.
553				 */
554				LIST_INSERT_BEFORE(node, reservation, links);
555				break;
556			}
557
558			if (node->addr == reservation->addr) {
559				/*
560				 * If the entry we want to add
561				 * matches any already in here,
562				 * fail.
563				 */
564				free(reservation, M_DEVBUF);
565				return (EEXIST);
566			}
567
568			if (!node->links.le_next) {
569				LIST_INSERT_AFTER(node, reservation, links);
570				break;
571			}
572		}
573	}
574	return (0);
575}
576
577int
578eisa_add_mspace(device_t dev, u_long mbase, u_long msize, int flags)
579{
580	struct eisa_device *e_dev = device_get_ivars(dev);
581
582	return	eisa_add_resvaddr(e_dev, &(e_dev->ioconf.maddrs), mbase, msize,
583				  flags);
584}
585
586int
587eisa_add_iospace(device_t dev, u_long iobase, u_long iosize, int flags)
588{
589	struct eisa_device *e_dev = device_get_ivars(dev);
590
591	return	eisa_add_resvaddr(e_dev, &(e_dev->ioconf.ioaddrs), iobase,
592				  iosize, flags);
593}
594
595static device_method_t eisa_methods[] = {
596	/* Device interface */
597	DEVMETHOD(device_probe,		eisa_probe),
598	DEVMETHOD(device_attach,	bus_generic_attach),
599	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
600	DEVMETHOD(device_suspend,	bus_generic_suspend),
601	DEVMETHOD(device_resume,	bus_generic_resume),
602
603	/* Bus interface */
604	DEVMETHOD(bus_print_child,	eisa_print_child),
605	DEVMETHOD(bus_probe_nomatch,	eisa_probe_nomatch),
606	DEVMETHOD(bus_read_ivar,	eisa_read_ivar),
607	DEVMETHOD(bus_write_ivar,	eisa_write_ivar),
608	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
609	DEVMETHOD(bus_alloc_resource,	eisa_alloc_resource),
610	DEVMETHOD(bus_release_resource,	eisa_release_resource),
611	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
612	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
613	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
614	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
615
616	{ 0, 0 }
617};
618
619static driver_t eisa_driver = {
620	"eisa",
621	eisa_methods,
622	1,			/* no softc */
623};
624
625DRIVER_MODULE(eisa, isab, eisa_driver, eisa_devclass, 0, 0);
626DRIVER_MODULE(eisa, nexus, eisa_driver, eisa_devclass, 0, 0);
627