xref: /netbsd-src/sys/arch/sparc/dev/obio.c (revision 76dfffe33547c37f8bdd446e3e4ab0f3c16cea4b) 
1 /*	$NetBSD: obio.c,v 1.27 1996/10/13 03:00:04 christos Exp $	*/
2 
3 /*
4  * Copyright (c) 1993, 1994 Theo de Raadt
5  * Copyright (c) 1995 Paul Kranenburg
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, 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. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by Theo de Raadt.
19  * 4. The name of the author may not be used to endorse or promote products
20  *    derived from this software without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/device.h>
37 #include <sys/malloc.h>
38 
39 #ifdef DEBUG
40 #include <sys/proc.h>
41 #include <sys/syslog.h>
42 #endif
43 
44 #include <vm/vm.h>
45 
46 #include <machine/autoconf.h>
47 #include <machine/pmap.h>
48 #include <machine/oldmon.h>
49 #include <machine/cpu.h>
50 #include <machine/ctlreg.h>
51 #include <sparc/sparc/asm.h>
52 #include <sparc/sparc/vaddrs.h>
53 #include <sparc/dev/sbusvar.h>
54 
55 struct bus_softc {
56 	union {
57 		struct	device scu_dev;		/* base device */
58 		struct	sbus_softc scu_sbus;	/* obio is another sbus slot */
59 	} bu;
60 #define sc_dev	bu.scu_dev
61 };
62 
63 /* autoconfiguration driver */
64 static int	busmatch __P((struct device *, void *, void *));
65 static void	obioattach __P((struct device *, struct device *, void *));
66 static void	vmesattach __P((struct device *, struct device *, void *));
67 static void	vmelattach __P((struct device *, struct device *, void *));
68 
69 int		busprint __P((void *, const char *));
70 static int	busattach __P((struct device *, void *, void *, int));
71 void *		bus_map __P((struct rom_reg *, int, int));
72 int		obio_scan __P((struct device *, void *, void *));
73 int 		vmes_scan __P((struct device *, void *, void *));
74 int 		vmel_scan __P((struct device *, void *, void *));
75 int 		vmeintr __P((void *));
76 
77 struct cfattach obio_ca = {
78 	sizeof(struct bus_softc), busmatch, obioattach
79 };
80 
81 struct cfdriver obio_cd = {
82 	NULL, "obio", DV_DULL
83 };
84 
85 struct cfattach vmel_ca = {
86 	sizeof(struct bus_softc), busmatch, vmelattach
87 };
88 
89 struct cfdriver vmel_cd = {
90 	NULL, "vmel", DV_DULL
91 };
92 
93 struct cfattach vmes_ca = {
94 	sizeof(struct bus_softc), busmatch, vmesattach
95 };
96 
97 struct cfdriver vmes_cd = {
98 	NULL, "vmes", DV_DULL
99 };
100 
101 struct intrhand **vmeints;
102 
103 
104 int
105 busmatch(parent, vcf, aux)
106 	struct device *parent;
107 	void *vcf, *aux;
108 {
109 	struct cfdata *cf = vcf;
110 	register struct confargs *ca = aux;
111 	register struct romaux *ra = &ca->ca_ra;
112 
113 	if (CPU_ISSUN4M)
114 		return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
115 
116 	if (!CPU_ISSUN4)
117 		return (0);
118 
119 	return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
120 }
121 
122 int
123 busprint(args, obio)
124 	void *args;
125 	const char *obio;
126 {
127 	register struct confargs *ca = args;
128 
129 	if (ca->ca_ra.ra_name == NULL)
130 		ca->ca_ra.ra_name = "<unknown>";
131 
132 	if (obio)
133 		printf("[%s at %s]", ca->ca_ra.ra_name, obio);
134 
135 	printf(" addr %p", ca->ca_ra.ra_paddr);
136 
137 	if (CPU_ISSUN4 && ca->ca_ra.ra_intr[0].int_vec != -1)
138 		printf(" vec 0x%x", ca->ca_ra.ra_intr[0].int_vec);
139 
140 	return (UNCONF);
141 }
142 
143 
144 void
145 obioattach(parent, self, args)
146 	struct device *parent, *self;
147 	void *args;
148 {
149 #if defined(SUN4M)
150 	register struct bus_softc *sc = (struct bus_softc *)self;
151 	struct confargs oca, *ca = args;
152 	register struct romaux *ra = &ca->ca_ra;
153 	register int node0, node;
154 	register char *name;
155 	register const char *sp;
156 	const char *const *ssp;
157 	extern int autoconf_nzs;
158 
159 	static const char *const special4m[] = {
160 		/* find these first */
161 		"eeprom",
162 		"counter",
163 		"auxio",
164 		"",
165 		/* place device to ignore here */
166 		"interrupt",
167 		NULL
168 	};
169 #endif
170 
171 	if (CPU_ISSUN4) {
172 		if (self->dv_unit > 0) {
173 			printf(" unsupported\n");
174 			return;
175 		}
176 		printf("\n");
177 
178 		(void)config_search(obio_scan, self, args);
179 		bus_untmp();
180 	}
181 
182 #if defined(SUN4M)
183 	if (!CPU_ISSUN4M)
184 		return;
185 
186 	/*
187 	 * There is only one obio bus (it is in fact one of the Sbus slots)
188 	 * How about VME?
189 	 */
190 	if (sc->sc_dev.dv_unit > 0) {
191 		printf(" unsupported\n");
192 		return;
193 	}
194 
195 	printf("\n");
196 
197 	if (ra->ra_bp != NULL && strcmp(ra->ra_bp->name, "obio") == 0)
198 		oca.ca_ra.ra_bp = ra->ra_bp + 1;
199 	else
200 		oca.ca_ra.ra_bp = NULL;
201 
202 	sc->bu.scu_sbus.sc_range = ra->ra_range;
203 	sc->bu.scu_sbus.sc_nrange = ra->ra_nrange;
204 
205 	/*
206 	 * Loop through ROM children, fixing any relative addresses
207 	 * and then configuring each device.
208 	 * We first do the crucial ones, such as eeprom, etc.
209 	 */
210 	node0 = firstchild(ra->ra_node);
211 	for (ssp = special4m ; *(sp = *ssp) != 0; ssp++) {
212 		if ((node = findnode(node0, sp)) == 0) {
213 			printf("could not find %s amongst obio devices\n", sp);
214 			panic(sp);
215 		}
216 		if (!romprop(&oca.ca_ra, sp, node))
217 			continue;
218 
219 		sbus_translate(self, &oca);
220 		oca.ca_bustype = BUS_OBIO;
221 		(void) config_found(&sc->sc_dev, (void *)&oca, busprint);
222 	}
223 
224 	for (node = node0; node; node = nextsibling(node)) {
225 		name = getpropstring(node, "name");
226 		for (ssp = special4m ; (sp = *ssp) != NULL; ssp++)
227 			if (strcmp(name, sp) == 0)
228 				break;
229 
230 		if (sp != NULL || !romprop(&oca.ca_ra, name, node))
231 			continue;
232 
233 		if (strcmp(name, "zs") == 0)
234 			/* XXX - see autoconf.c for this hack */
235 			autoconf_nzs++;
236 
237 		/* Translate into parent address spaces */
238 		sbus_translate(self, &oca);
239 		oca.ca_bustype = BUS_OBIO;
240 		(void) config_found(&sc->sc_dev, (void *)&oca, busprint);
241 	}
242 #endif
243 }
244 
245 void
246 vmesattach(parent, self, args)
247 	struct device *parent, *self;
248 	void *args;
249 {
250 	if (CPU_ISSUN4M || self->dv_unit > 0) {
251 		printf(" unsupported\n");
252 		return;
253 	}
254 	printf("\n");
255 
256 	if (vmeints == NULL) {
257 		vmeints = (struct intrhand **)malloc(256 *
258 		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
259 		bzero(vmeints, 256 * sizeof(struct intrhand *));
260 	}
261 	(void)config_search(vmes_scan, self, args);
262 	bus_untmp();
263 }
264 
265 void
266 vmelattach(parent, self, args)
267 	struct device *parent, *self;
268 	void *args;
269 {
270 	if (CPU_ISSUN4M || self->dv_unit > 0) {
271 		printf(" unsupported\n");
272 		return;
273 	}
274 	printf("\n");
275 
276 	if (vmeints == NULL) {
277 		vmeints = (struct intrhand **)malloc(256 *
278 		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
279 		bzero(vmeints, 256 * sizeof(struct intrhand *));
280 	}
281 	(void)config_search(vmel_scan, self, args);
282 	bus_untmp();
283 }
284 
285 int
286 busattach(parent, child, args, bustype)
287 	struct device *parent;
288 	void *args, *child;
289 	int bustype;
290 {
291 #if defined(SUN4)
292 	struct cfdata *cf = child;
293 	register struct confargs *ca = args;
294 	struct confargs oca;
295 	caddr_t tmp;
296 
297 	if (bustype == BUS_OBIO && CPU_ISSUN4) {
298 
299 		/*
300 		 * avoid sun4m entries which don't have valid PA's.
301 		 * no point in even probing them.
302 		 */
303 		if (cf->cf_loc[0] == -1) return 0;
304 
305 		/*
306 		 * On the 4/100 obio addresses must be mapped at
307 		 * 0x0YYYYYYY, but alias higher up (we avoid the
308 		 * alias condition because it causes pmap difficulties)
309 		 * XXX: We also assume that 4/[23]00 obio addresses
310 		 * must be 0xZYYYYYYY, where (Z != 0)
311 		 */
312 		if (cpumod == SUN4_100 && (cf->cf_loc[0] & 0xf0000000))
313 			return 0;
314 		if (cpumod != SUN4_100 && !(cf->cf_loc[0] & 0xf0000000))
315 			return 0;
316 	}
317 
318 	if (parent->dv_cfdata->cf_driver->cd_indirect) {
319 		printf(" indirect devices not supported\n");
320 		return 0;
321 	}
322 
323 	oca.ca_ra.ra_iospace = -1;
324 	oca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
325 	oca.ca_ra.ra_len = 0;
326 	oca.ca_ra.ra_nreg = 1;
327 	if (oca.ca_ra.ra_paddr)
328 		tmp = (caddr_t)bus_tmp(oca.ca_ra.ra_paddr,
329 		    bustype);
330 	else
331 		tmp = NULL;
332 	oca.ca_ra.ra_vaddr = tmp;
333 	oca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
334 	if (bustype == BUS_VME16 || bustype == BUS_VME32)
335 		oca.ca_ra.ra_intr[0].int_vec = cf->cf_loc[2];
336 	else
337 		oca.ca_ra.ra_intr[0].int_vec = -1;
338 	oca.ca_ra.ra_nintr = 1;
339 	oca.ca_ra.ra_name = cf->cf_driver->cd_name;
340 	if (ca->ca_ra.ra_bp != NULL &&
341 	  ((bustype == BUS_VME16 && strcmp(ca->ca_ra.ra_bp->name,"vmes") ==0) ||
342 	   (bustype == BUS_VME32 && strcmp(ca->ca_ra.ra_bp->name,"vmel") ==0) ||
343 	   (bustype == BUS_OBIO && strcmp(ca->ca_ra.ra_bp->name,"obio") == 0)))
344 		oca.ca_ra.ra_bp = ca->ca_ra.ra_bp + 1;
345 	else
346 		oca.ca_ra.ra_bp = NULL;
347 	oca.ca_bustype = bustype;
348 
349 	if ((*cf->cf_attach->ca_match)(parent, cf, &oca) == 0)
350 		return 0;
351 
352 	/*
353 	 * check if XXmatch routine replaced the temporary mapping with
354 	 * a real mapping.   If not, then make sure we don't pass the
355 	 * tmp mapping to the attach routine.
356 	 */
357 	if (oca.ca_ra.ra_vaddr == tmp)
358 		oca.ca_ra.ra_vaddr = NULL; /* wipe out tmp address */
359 	/*
360 	 * the match routine will set "ra_len" if it wants us to
361 	 * establish a mapping for it.
362 	 * (which won't be seen on future XXmatch calls,
363 	 * so not as useful as it seems.)
364 	 */
365 	if (oca.ca_ra.ra_len)
366 		oca.ca_ra.ra_vaddr =
367 		    bus_map(oca.ca_ra.ra_reg,
368 		    oca.ca_ra.ra_len, oca.ca_bustype);
369 
370 	config_attach(parent, cf, &oca, busprint);
371 	return 1;
372 #else
373 	return 0;
374 #endif
375 }
376 
377 int
378 obio_scan(parent, child, args)
379 	struct device *parent;
380 	void *child, *args;
381 {
382 	return busattach(parent, child, args, BUS_OBIO);
383 }
384 
385 int
386 vmes_scan(parent, child, args)
387 	struct device *parent;
388 	void *child, *args;
389 {
390 	return busattach(parent, child, args, BUS_VME16);
391 }
392 
393 int
394 vmel_scan(parent, child, args)
395 	struct device *parent;
396 	void *child, *args;
397 {
398 	return busattach(parent, child, args, BUS_VME32);
399 }
400 
401 int pil_to_vme[] = {
402 	-1,	/* pil 0 */
403 	-1,	/* pil 1 */
404 	1,	/* pil 2 */
405 	2,	/* pil 3 */
406 	-1,	/* pil 4 */
407 	3,	/* pil 5 */
408 	-1,	/* pil 6 */
409 	4,	/* pil 7 */
410 	-1,	/* pil 8 */
411 	5,	/* pil 9 */
412 	-1,	/* pil 10 */
413 	6,	/* pil 11 */
414 	-1,	/* pil 12 */
415 	7,	/* pil 13 */
416 	-1,	/* pil 14 */
417 	-1,	/* pil 15 */
418 };
419 
420 int
421 vmeintr(arg)
422 	void *arg;
423 {
424 	int level = (int)arg, vec;
425 	struct intrhand *ih;
426 	int i = 0;
427 
428 #ifdef DIAGNOSTIC
429 	if (!CPU_ISSUN4) {
430 		panic("vme: spurious interrupt");
431 	}
432 #endif
433 
434 	vec = ldcontrolb((caddr_t)
435 	    (AC_VMEINTVEC | (pil_to_vme[level] << 1) | 1));
436 	if (vec == -1) {
437 		printf("vme: spurious interrupt\n");
438 		return 0;
439 	}
440 
441 	for (ih = vmeints[vec]; ih; ih = ih->ih_next)
442 		if (ih->ih_fun)
443 			i += (ih->ih_fun)(ih->ih_arg);
444 	return (i);
445 }
446 
447 void
448 vmeintr_establish(vec, level, ih)
449 	int vec, level;
450 	struct intrhand *ih;
451 {
452 	struct intrhand *ihs;
453 
454 	if (!CPU_ISSUN4) {
455 		panic("vmeintr_establish: not supported on cpu-type %d",
456 		      cputyp);
457 	}
458 
459 	if (vec == -1)
460 		panic("vmeintr_establish: uninitialized vec\n");
461 
462 	if (vmeints[vec] == NULL)
463 		vmeints[vec] = ih;
464 	else {
465 		for (ihs = vmeints[vec]; ihs->ih_next; ihs = ihs->ih_next)
466 			;
467 		ihs->ih_next = ih;
468 	}
469 
470 	/* ensure the interrupt subsystem will call us at this level */
471 	for (ihs = intrhand[level]; ihs; ihs = ihs->ih_next)
472 		if (ihs->ih_fun == vmeintr)
473 			return;
474 
475 	ihs = (struct intrhand *)malloc(sizeof(struct intrhand),
476 	    M_TEMP, M_NOWAIT);
477 	if (ihs == NULL)
478 		panic("vme_addirq");
479 	bzero(ihs, sizeof *ihs);
480 	ihs->ih_fun = vmeintr;
481 	ihs->ih_arg = (void *)level;
482 	intr_establish(level, ihs);
483 }
484 
485 #define	getpte(va)		lda(va, ASI_PTE)
486 
487 /*
488  * If we can find a mapping that was established by the rom, use it.
489  * Else, create a new mapping.
490  */
491 void *
492 bus_map(pa, len, bustype)
493 	struct rom_reg *pa;
494 	int len;
495 	int bustype;
496 {
497 	u_long	pf = (u_long)(pa->rr_paddr) >> PGSHIFT;
498 	u_long	va, pte;
499 	int pgtype = -1;
500 
501 	switch (bt2pmt[bustype]) {
502 	case PMAP_OBIO:
503 		pgtype = PG_OBIO;
504 		break;
505 	case PMAP_VME32:
506 		pgtype = PG_VME32;
507 		break;
508 	case PMAP_VME16:
509 		pgtype = PG_VME16;
510 		break;
511 	}
512 
513 	if (len <= NBPG) {
514 		for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) {
515 			pte = getpte(va);
516 			if ((pte & PG_V) != 0 && (pte & PG_TYPE) == pgtype &&
517 			    (pte & PG_PFNUM) == pf)
518 				return ((void *)
519 				    (va | ((u_long)pa->rr_paddr & PGOFSET)) );
520 					/* note: preserve page offset */
521 		}
522 	}
523 	return mapiodev(pa, 0, len, bustype);
524 }
525 
526 void *
527 bus_tmp(pa, bustype)
528 	void *pa;
529 	int bustype;
530 {
531 	vm_offset_t addr = (vm_offset_t)pa & ~PGOFSET;
532 	int pmtype = bt2pmt[bustype];
533 
534 	pmap_enter(pmap_kernel(), TMPMAP_VA,
535 		   addr | pmtype | PMAP_NC,
536 		   VM_PROT_READ | VM_PROT_WRITE, 1);
537 	return ((void *)(TMPMAP_VA | ((u_long) pa & PGOFSET)) );
538 }
539 
540 void
541 bus_untmp()
542 {
543 	pmap_remove(pmap_kernel(), TMPMAP_VA, TMPMAP_VA+NBPG);
544 }
545