1 /* $NetBSD: obio.c,v 1.11 2003/07/15 00:25:05 lukem Exp $ */
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
41 #include <sys/param.h>
42 #include <sys/systm.h>
44 #include <sys/interrupt.h>
45 #include <sys/kernel.h>
46 #include <sys/module.h>
48 #include <sys/malloc.h>
50 #include <machine/bus.h>
52 #include <mips/adm5120/adm5120reg.h>
53 #include <mips/adm5120/obiovar.h>
55 /* MIPS HW interrupts of IRQ/FIQ respectively */
56 #define ADM5120_INTR 0
57 #define ADM5120_FAST_INTR 1
59 /* Interrupt levels */
63 int irq_priorities[NIRQS] = {
68 INTR_IRQ, /* unknown */
69 INTR_IRQ, /* unknown */
70 INTR_IRQ, /* unknown */
71 INTR_IRQ, /* unknown */
72 INTR_IRQ, /* unknown */
74 INTR_IRQ, /* unknown */
75 INTR_IRQ, /* unknown */
76 INTR_IRQ, /* unknown */
77 INTR_IRQ, /* unknown */
78 INTR_IRQ, /* unknown */
79 INTR_IRQ, /* unknown */
80 INTR_IRQ, /* unknown */
81 INTR_IRQ, /* unknown */
82 INTR_IRQ, /* unknown */
83 INTR_IRQ, /* unknown */
84 INTR_IRQ, /* unknown */
85 INTR_IRQ, /* unknown */
86 INTR_IRQ, /* unknown */
87 INTR_IRQ, /* unknown */
88 INTR_IRQ, /* unknown */
89 INTR_IRQ, /* unknown */
90 INTR_IRQ, /* unknown */
91 INTR_IRQ, /* unknown */
92 INTR_IRQ, /* unknown */
93 INTR_IRQ, /* unknown */
94 INTR_IRQ, /* unknown */
95 INTR_IRQ, /* unknown */
99 #define REG_READ(o) *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(ADM5120_BASE_ICU + (o)))
100 #define REG_WRITE(o,v) (REG_READ(o)) = (v)
102 static int obio_activate_resource(device_t, device_t, int, int,
104 static device_t obio_add_child(device_t, int, const char *, int);
105 static struct resource *
106 obio_alloc_resource(device_t, device_t, int, int *, u_long,
107 u_long, u_long, u_int);
108 static int obio_attach(device_t);
109 static int obio_deactivate_resource(device_t, device_t, int, int,
111 static struct resource_list *
112 obio_get_resource_list(device_t, device_t);
113 static void obio_hinted_child(device_t, const char *, int);
114 static int obio_intr(void *);
115 static int obio_probe(device_t);
116 static int obio_release_resource(device_t, device_t, int, int,
118 static int obio_setup_intr(device_t, device_t, struct resource *, int,
119 driver_filter_t *, driver_intr_t *, void *, void **);
120 static int obio_teardown_intr(device_t, device_t, struct resource *,
124 obio_probe(device_t dev)
131 obio_attach(device_t dev)
133 struct obio_softc *sc = device_get_softc(dev);
136 sc->oba_mem_rman.rm_type = RMAN_ARRAY;
137 sc->oba_mem_rman.rm_descr = "OBIO memeory";
138 if (rman_init(&sc->oba_mem_rman) != 0 ||
139 rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
140 OBIO_MEM_START + OBIO_MEM_SIZE) != 0)
141 panic("obio_attach: failed to set up I/O rman");
143 sc->oba_irq_rman.rm_type = RMAN_ARRAY;
144 sc->oba_irq_rman.rm_descr = "OBIO IRQ";
146 if (rman_init(&sc->oba_irq_rman) != 0 ||
147 rman_manage_region(&sc->oba_irq_rman, 0, NIRQS-1) != 0)
148 panic("obio_attach: failed to set up IRQ rman");
150 /* Hook up our interrupt handler. */
151 if ((sc->sc_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
152 ADM5120_INTR, ADM5120_INTR, 1,
153 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
154 device_printf(dev, "unable to allocate IRQ resource\n");
158 if ((bus_setup_intr(dev, sc->sc_irq, INTR_TYPE_MISC, obio_intr, NULL,
161 "WARNING: unable to register interrupt handler\n");
165 /* Hook up our FAST interrupt handler. */
166 if ((sc->sc_fast_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid,
167 ADM5120_FAST_INTR, ADM5120_FAST_INTR, 1,
168 RF_SHAREABLE | RF_ACTIVE)) == NULL) {
169 device_printf(dev, "unable to allocate IRQ resource\n");
173 if ((bus_setup_intr(dev, sc->sc_fast_irq, INTR_TYPE_MISC, obio_intr,
174 NULL, sc, &sc->sc_fast_ih))) {
176 "WARNING: unable to register interrupt handler\n");
180 /* disable all interrupts */
181 REG_WRITE(ICU_ENABLE_REG, ICU_INT_MASK);
183 bus_generic_probe(dev);
184 bus_enumerate_hinted_children(dev);
185 bus_generic_attach(dev);
190 static struct resource *
191 obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
192 u_long start, u_long end, u_long count, u_int flags)
194 struct obio_softc *sc = device_get_softc(bus);
195 struct obio_ivar *ivar = device_get_ivars(child);
197 struct resource_list_entry *rle;
199 int isdefault, needactivate, passthrough;
201 isdefault = (start == 0UL && end == ~0UL && count == 1);
202 needactivate = flags & RF_ACTIVE;
203 passthrough = (device_get_parent(child) != bus);
207 return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
208 rid, start, end, count, flags));
211 * If this is an allocation of the "default" range for a given RID,
212 * and we know what the resources for this device are (ie. they aren't
213 * maintained by a child bus), then work out the start/end values.
216 rle = resource_list_find(&ivar->resources, type, *rid);
219 if (rle->res != NULL) {
220 panic("%s: resource entry is busy", __func__);
229 rm = &sc->oba_irq_rman;
232 rm = &sc->oba_mem_rman;
235 printf("%s: unknown resource type %d\n", __func__, type);
239 rv = rman_reserve_resource(rm, start, end, count, flags, child);
241 printf("%s: could not reserve resource\n", __func__);
245 rman_set_rid(rv, *rid);
248 if (bus_activate_resource(child, type, *rid, rv)) {
249 printf("%s: could not activate resource\n", __func__);
250 rman_release_resource(rv);
259 obio_activate_resource(device_t bus, device_t child, int type, int rid,
264 * If this is a memory resource, track the direct mapping
265 * in the uncached MIPS KSEG1 segment.
267 if (type == SYS_RES_MEMORY) {
270 vaddr = (void *)MIPS_PHYS_TO_KSEG1((intptr_t)rman_get_start(r));
271 rman_set_virtual(r, vaddr);
272 rman_set_bustag(r, MIPS_BUS_SPACE_MEM);
273 rman_set_bushandle(r, (bus_space_handle_t)vaddr);
276 return (rman_activate_resource(r));
280 obio_deactivate_resource(device_t bus, device_t child, int type, int rid,
284 return (rman_deactivate_resource(r));
288 obio_release_resource(device_t dev, device_t child, int type,
289 int rid, struct resource *r)
291 struct resource_list *rl;
292 struct resource_list_entry *rle;
294 rl = obio_get_resource_list(dev, child);
297 rle = resource_list_find(rl, type, rid);
300 rman_release_resource(r);
307 obio_setup_intr(device_t dev, device_t child, struct resource *ires,
308 int flags, driver_filter_t *filt, driver_intr_t *handler,
309 void *arg, void **cookiep)
311 struct obio_softc *sc = device_get_softc(dev);
312 struct intr_event *event;
313 int irq, error, priority;
316 irq = rman_get_start(ires);
319 panic("%s: bad irq %d", __func__, irq);
321 event = sc->sc_eventstab[irq];
323 error = intr_event_create(&event, (void *)irq, 0, irq,
324 (mask_fn)mips_mask_irq, (mask_fn)mips_unmask_irq,
325 NULL, NULL, "obio intr%d:", irq);
327 sc->sc_eventstab[irq] = event;
330 panic("obio: Can't share IRQs");
332 intr_event_add_handler(event, device_get_nameunit(child), filt,
333 handler, arg, intr_priority(flags), flags, cookiep);
336 priority = irq_priorities[irq];
338 if (priority == INTR_FIQ)
339 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) | irqmask);
341 REG_WRITE(ICU_MODE_REG, REG_READ(ICU_MODE_REG) & ~irqmask);
344 REG_WRITE(ICU_ENABLE_REG, irqmask);
350 obio_teardown_intr(device_t dev, device_t child, struct resource *ires,
353 struct obio_softc *sc = device_get_softc(dev);
357 irq = rman_get_start(ires);
359 panic("%s: bad irq %d", __func__, irq);
361 if (sc->sc_eventstab[irq] == NULL)
362 panic("Trying to teardown unoccupied IRQ");
364 irqmask = 1 << irq; /* only used as a mask from here on */
366 /* disable this irq in HW */
367 REG_WRITE(ICU_DISABLE_REG, irqmask);
369 result = intr_event_remove_handler(cookie);
371 sc->sc_eventstab[irq] = NULL;
380 struct obio_softc *sc = arg;
381 struct intr_event *event;
385 irqstat = REG_READ(ICU_FIQ_STATUS_REG);
386 irqstat |= REG_READ(ICU_STATUS_REG);
389 while (irqstat != 0) {
390 if ((irqstat & 1) == 1) {
391 event = sc->sc_eventstab[irq];
392 if (!event || TAILQ_EMPTY(&event->ie_handlers))
395 /* TODO: pass frame as an argument*/
396 /* TODO: log stray interrupt */
397 intr_event_handle(event, NULL);
404 return (FILTER_HANDLED);
408 obio_hinted_child(device_t bus, const char *dname, int dunit)
416 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
419 * Set hard-wired resources for hinted child using
422 resource_long_value(dname, dunit, "maddr", &maddr);
423 resource_int_value(dname, dunit, "msize", &msize);
426 result = bus_set_resource(child, SYS_RES_MEMORY, 0,
429 device_printf(bus, "warning: bus_set_resource() failed\n");
431 if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
432 result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
435 "warning: bus_set_resource() failed\n");
440 obio_add_child(device_t bus, int order, const char *name, int unit)
443 struct obio_ivar *ivar;
445 ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
447 printf("Failed to allocate ivar\n");
450 resource_list_init(&ivar->resources);
452 child = device_add_child_ordered(bus, order, name, unit);
454 printf("Can't add child %s%d ordered\n", name, unit);
458 device_set_ivars(child, ivar);
464 * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
465 * Provides pointer to resource_list for these routines
467 static struct resource_list *
468 obio_get_resource_list(device_t dev, device_t child)
470 struct obio_ivar *ivar;
472 ivar = device_get_ivars(child);
473 return (&(ivar->resources));
476 static device_method_t obio_methods[] = {
477 DEVMETHOD(bus_activate_resource, obio_activate_resource),
478 DEVMETHOD(bus_add_child, obio_add_child),
479 DEVMETHOD(bus_alloc_resource, obio_alloc_resource),
480 DEVMETHOD(bus_deactivate_resource, obio_deactivate_resource),
481 DEVMETHOD(bus_get_resource_list, obio_get_resource_list),
482 DEVMETHOD(bus_hinted_child, obio_hinted_child),
483 DEVMETHOD(bus_release_resource, obio_release_resource),
484 DEVMETHOD(bus_setup_intr, obio_setup_intr),
485 DEVMETHOD(bus_teardown_intr, obio_teardown_intr),
486 DEVMETHOD(device_attach, obio_attach),
487 DEVMETHOD(device_probe, obio_probe),
488 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
489 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
494 static driver_t obio_driver = {
497 sizeof(struct obio_softc),
499 static devclass_t obio_devclass;
501 DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);