1 files changed, 514 insertions, 0 deletions

diff --git a/sys/mips/idt/obio.c b/sys/mips/idt/obio.c
new file mode 100644
index 0000000..c938f72
--- /dev/null
+++ b/sys/mips/idt/obio.c
@@ -0,0 +1,514 @@
+/*-
+ * Copyright (c) 2007, Oleksandr Tymoshenko <gonzo@freebsd.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed for the NetBSD Project by
+ *	Wasabi Systems, Inc.
+ * 4. The name of Wasabi Systems, Inc. may not be used to endorse
+ *    or promote products derived from this software without specific prior
+ *    written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/interrupt.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/rman.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+
+#include <mips/mips32/idt/idtreg.h>
+#include <mips/mips32/idt/obiovar.h>
+
+#define ICU_REG_READ(o) \
+    *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_ICU + (o)))
+#define ICU_REG_WRITE(o,v) (ICU_REG_READ(o)) = (v)
+
+#define GPIO_REG_READ(o) \
+    *((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(IDT_BASE_GPIO + (o)))
+#define GPIO_REG_WRITE(o,v) (GPIO_REG_READ(o)) = (v)
+
+static int	obio_activate_resource(device_t, device_t, int, int,
+		    struct resource *);
+static device_t	obio_add_child(device_t, int, const char *, int);
+static struct resource *
+		obio_alloc_resource(device_t, device_t, int, int *, u_long,
+		    u_long, u_long, u_int);
+static int	obio_attach(device_t);
+static int	obio_deactivate_resource(device_t, device_t, int, int,
+		    struct resource *);
+static struct resource_list *
+		obio_get_resource_list(device_t, device_t);
+static void	obio_hinted_child(device_t, const char *, int);
+static int	obio_intr(void *);
+static int	obio_probe(device_t);
+static int	obio_release_resource(device_t, device_t, int, int,
+		    struct resource *);
+static int	obio_setup_intr(device_t, device_t, struct resource *, int,
+		    driver_filter_t *, driver_intr_t *, void *, void **);
+static int	obio_teardown_intr(device_t, device_t, struct resource *,
+		    void *);
+
+static void obio_mask_irq(unsigned int irq)
+{
+	int ip_bit, mask, mask_register;
+
+	/* mask IRQ */
+	mask_register = ICU_IRQ_MASK_REG(irq);
+	ip_bit = ICU_IP_BIT(irq);
+
+	mask = ICU_REG_READ(mask_register);
+	ICU_REG_WRITE(mask_register, mask | ip_bit);
+}
+
+static void obio_unmask_irq(unsigned int irq)
+{
+	int ip_bit, mask, mask_register;
+
+	/* unmask IRQ */
+	mask_register = ICU_IRQ_MASK_REG(irq);
+	ip_bit = ICU_IP_BIT(irq);
+
+	mask = ICU_REG_READ(mask_register);
+	ICU_REG_WRITE(mask_register, mask & ~ip_bit);
+}
+
+static int
+obio_probe(device_t dev)
+{
+
+	return (0);
+}
+
+static int
+obio_attach(device_t dev)
+{
+	struct obio_softc *sc = device_get_softc(dev);
+	int rid, irq;
+
+	sc->oba_mem_rman.rm_type = RMAN_ARRAY;
+	sc->oba_mem_rman.rm_descr = "OBIO memeory";
+	if (rman_init(&sc->oba_mem_rman) != 0 ||
+	    rman_manage_region(&sc->oba_mem_rman, OBIO_MEM_START,
+	        OBIO_MEM_START + OBIO_MEM_SIZE) != 0)
+		panic("obio_attach: failed to set up I/O rman");
+
+	sc->oba_irq_rman.rm_type = RMAN_ARRAY;
+	sc->oba_irq_rman.rm_descr = "OBIO IRQ";
+
+	if (rman_init(&sc->oba_irq_rman) != 0 ||
+	    rman_manage_region(&sc->oba_irq_rman, IRQ_BASE, IRQ_END) != 0)
+		panic("obio_attach: failed to set up IRQ rman");
+
+	/* Hook up our interrupt handlers. We should handle IRQ0..IRQ4*/
+	for(irq = 0; irq < 5; irq++) {
+		if ((sc->sc_irq[irq] = bus_alloc_resource(dev, SYS_RES_IRQ, 
+		    &rid, irq, irq, 1, RF_SHAREABLE | RF_ACTIVE)) == NULL) {
+			device_printf(dev, "unable to allocate IRQ resource\n");
+			return (ENXIO);
+		}
+
+		if ((bus_setup_intr(dev, sc->sc_irq[irq], INTR_TYPE_MISC, 
+		    obio_intr, NULL, sc, &sc->sc_ih[irq]))) {
+			device_printf(dev,
+			    "WARNING: unable to register interrupt handler\n");
+			return (ENXIO);
+		}
+	}
+
+	bus_generic_probe(dev);
+	bus_enumerate_hinted_children(dev);
+	bus_generic_attach(dev);
+
+	return (0);
+}
+
+static struct resource *
+obio_alloc_resource(device_t bus, device_t child, int type, int *rid,
+    u_long start, u_long end, u_long count, u_int flags)
+{
+	struct obio_softc		*sc = device_get_softc(bus);
+	struct obio_ivar		*ivar = device_get_ivars(child);
+	struct resource			*rv;
+	struct resource_list_entry	*rle;
+	struct rman			*rm;
+	int				 isdefault, needactivate, passthrough;
+
+	isdefault = (start == 0UL && end == ~0UL);
+	needactivate = flags & RF_ACTIVE;
+	passthrough = (device_get_parent(child) != bus);
+	rle = NULL;
+
+	if (passthrough)
+		return (BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type,
+		    rid, start, end, count, flags));
+
+	/*
+	 * If this is an allocation of the "default" range for a given RID,
+	 * and we know what the resources for this device are (ie. they aren't
+	 * maintained by a child bus), then work out the start/end values.
+	 */
+	if (isdefault) {
+		rle = resource_list_find(&ivar->resources, type, *rid);
+		if (rle == NULL)
+			return (NULL);
+		if (rle->res != NULL) {
+			panic("%s: resource entry is busy", __func__);
+		}
+		start = rle->start;
+		end = rle->end;
+		count = rle->count;
+	}
+
+	switch (type) {
+	case SYS_RES_IRQ:
+		rm = &sc->oba_irq_rman;
+		break;
+	case SYS_RES_MEMORY:
+		rm = &sc->oba_mem_rman;
+		break;
+	default:
+		printf("%s: unknown resource type %d\n", __func__, type);
+		return (0);
+	}
+
+	rv = rman_reserve_resource(rm, start, end, count, flags, child);
+	if (rv == 0) {
+		printf("%s: could not reserve resource\n", __func__);
+		return (0);
+	}
+
+	rman_set_rid(rv, *rid);
+
+	if (needactivate) {
+		if (bus_activate_resource(child, type, *rid, rv)) {
+			printf("%s: could not activate resource\n", __func__);
+			rman_release_resource(rv);
+			return (0);
+		}
+	}
+
+	return (rv);
+}
+
+static int
+obio_activate_resource(device_t bus, device_t child, int type, int rid,
+    struct resource *r)
+{
+
+	/* XXX: should we mask/unmask IRQ here? */
+	return (BUS_ACTIVATE_RESOURCE(device_get_parent(bus), child,
+		type, rid, r));
+}
+
+static int
+obio_deactivate_resource(device_t bus, device_t child, int type, int rid,
+    struct resource *r)
+{
+
+	/* XXX: should we mask/unmask IRQ here? */
+	return (BUS_DEACTIVATE_RESOURCE(device_get_parent(bus), child,
+		type, rid, r));
+}
+
+static int
+obio_release_resource(device_t dev, device_t child, int type,
+    int rid, struct resource *r)
+{
+	struct resource_list *rl;
+	struct resource_list_entry *rle;
+
+	rl = obio_get_resource_list(dev, child);
+	if (rl == NULL)
+		return (EINVAL);
+	rle = resource_list_find(rl, type, rid);
+	if (rle == NULL)
+		return (EINVAL);
+	rman_release_resource(r);
+	rle->res = NULL;
+
+	return (0);
+}
+
+static int
+obio_setup_intr(device_t dev, device_t child, struct resource *ires,
+		int flags, driver_filter_t *filt, driver_intr_t *handler,
+		void *arg, void **cookiep)
+{
+	struct obio_softc *sc = device_get_softc(dev);
+	struct intr_event *event;
+	int irq, ip_bit, error, mask, mask_register;
+
+	irq = rman_get_start(ires);
+
+	if (irq >= NIRQS)
+		panic("%s: bad irq %d", __func__, irq);
+
+	event = sc->sc_eventstab[irq];
+	if (event == NULL) {
+		error = intr_event_create(&event, (void *)irq, 0,
+		    (mask_fn)obio_mask_irq, (mask_fn)obio_unmask_irq,
+		    NULL, NULL,
+		    "obio intr%d:", irq);
+
+		sc->sc_eventstab[irq] = event;
+	}
+
+	intr_event_add_handler(event, device_get_nameunit(child), filt,
+	    handler, arg, intr_priority(flags), flags, cookiep);
+
+	/* unmask IRQ */
+	mask_register = ICU_IRQ_MASK_REG(irq);
+	ip_bit = ICU_IP_BIT(irq);
+
+	mask = ICU_REG_READ(mask_register);
+	ICU_REG_WRITE(mask_register, mask & ~ip_bit);
+
+	return (0);
+}
+
+static int
+obio_teardown_intr(device_t dev, device_t child, struct resource *ires,
+    void *cookie)
+{
+	struct obio_softc *sc = device_get_softc(dev);
+	int irq, result;
+	uint32_t mask_register, mask, ip_bit;
+
+	irq = rman_get_start(ires);
+	if (irq >= NIRQS)
+		panic("%s: bad irq %d", __func__, irq);
+
+	if (sc->sc_eventstab[irq] == NULL)
+		panic("Trying to teardown unoccupied IRQ");
+
+	/* mask IRQ */
+	mask_register = ICU_IRQ_MASK_REG(irq);
+	ip_bit = ICU_IP_BIT(irq);
+
+	mask = ICU_REG_READ(mask_register);
+	ICU_REG_WRITE(mask_register, mask | ip_bit);
+
+	result = intr_event_remove_handler(cookie);
+	if (!result)
+		sc->sc_eventstab[irq] = NULL;
+
+	return (result);
+}
+
+static int
+obio_intr(void *arg)
+{
+	struct obio_softc *sc = arg;
+	struct intr_event *event;
+	struct intr_handler *ih;
+	uint32_t irqstat, ipend, imask, xpend;
+	int irq, thread, group, i, ret;
+
+	irqstat = 0;
+	irq = 0;
+	for (group = 2; group <= 6; group++) {
+		ipend = ICU_REG_READ(ICU_GROUP_IPEND_REG(group));
+		imask = ICU_REG_READ(ICU_GROUP_MASK_REG(group));
+		xpend = ipend;
+		ipend &= ~imask;
+
+		while ((i = fls(xpend)) != 0) {
+			xpend &= ~(1 << (i - 1));
+			irq = IP_IRQ(group, i - 1);
+		}
+	
+		while ((i = fls(ipend)) != 0) {
+			ipend &= ~(1 << (i - 1));
+			irq = IP_IRQ(group, i - 1);
+			event = sc->sc_eventstab[irq];
+			thread = 0;
+#ifndef INTR_FILTER
+			obio_mask_irq(irq);
+#endif
+			if (!event || TAILQ_EMPTY(&event->ie_handlers)) {
+#ifdef INTR_FILTER
+				obio_unmask_irq(irq);
+#endif
+				continue;
+			}
+
+#ifdef INTR_FILTER
+			/* TODO: frame instead of NULL? */
+			intr_event_handle(event, NULL);
+			/* XXX: Log stray IRQs */
+#else
+			/* Execute fast handlers. */
+			TAILQ_FOREACH(ih, &event->ie_handlers,
+			    ih_next) {
+				if (ih->ih_filter == NULL)
+					thread = 1;
+				else
+					ret = ih->ih_filter(ih->ih_argument);
+				/*
+				 * Wrapper handler special case: see
+				 * intr_execute_handlers() in
+				 * i386/intr_machdep.c
+				 */
+				if (!thread) {
+					if (ret == FILTER_SCHEDULE_THREAD)
+						thread = 1;
+				}
+			}
+
+			/* Schedule thread if needed. */
+			if (thread)
+				intr_event_schedule_thread(event);
+			else
+				obio_unmask_irq(irq);
+		}
+	}
+#endif
+#if 0
+	ipend = ICU_REG_READ(ICU_IPEND2);
+	printf("ipend2 = %08x!\n", ipend);
+
+	ipend = ICU_REG_READ(ICU_IPEND3);
+	printf("ipend3 = %08x!\n", ipend);
+
+	ipend = ICU_REG_READ(ICU_IPEND4);
+	printf("ipend4 = %08x!\n", ipend);
+	ipend = ICU_REG_READ(ICU_IPEND5);
+	printf("ipend5 = %08x!\n", ipend);
+
+	ipend = ICU_REG_READ(ICU_IPEND6);
+	printf("ipend6 = %08x!\n", ipend);
+#endif
+	while (irqstat != 0) {
+		if ((irqstat & 1) == 1) {
+		}
+
+		irq++;
+		irqstat >>= 1;
+	}
+
+	return (FILTER_HANDLED);
+}
+
+static void
+obio_hinted_child(device_t bus, const char *dname, int dunit)
+{
+	device_t		child;
+	long			maddr;
+	int			msize;
+	int			irq;
+	int			result;
+
+	child = BUS_ADD_CHILD(bus, 0, dname, dunit);
+
+	/*
+	 * Set hard-wired resources for hinted child using
+	 * specific RIDs.
+	 */
+	resource_long_value(dname, dunit, "maddr", &maddr);
+	resource_int_value(dname, dunit, "msize", &msize);
+
+
+	result = bus_set_resource(child, SYS_RES_MEMORY, 0,
+	    maddr, msize);
+	if (result != 0)
+		device_printf(bus, "warning: bus_set_resource() failed\n");
+
+	if (resource_int_value(dname, dunit, "irq", &irq) == 0) {
+		result = bus_set_resource(child, SYS_RES_IRQ, 0, irq, 1);
+		if (result != 0)
+			device_printf(bus,
+			    "warning: bus_set_resource() failed\n");
+	}
+}
+
+static device_t
+obio_add_child(device_t bus, int order, const char *name, int unit)
+{
+	device_t		child;
+	struct obio_ivar	*ivar;
+
+	ivar = malloc(sizeof(struct obio_ivar), M_DEVBUF, M_WAITOK | M_ZERO);
+	if (ivar == NULL) {
+		printf("Failed to allocate ivar\n");
+		return (0);
+	}
+	resource_list_init(&ivar->resources);
+
+	child = device_add_child_ordered(bus, order, name, unit);
+	if (child == NULL) {
+		printf("Can't add child %s%d ordered\n", name, unit);
+		return (0);
+	}
+
+	device_set_ivars(child, ivar);
+
+	return (child);
+}
+
+/*
+ * Helper routine for bus_generic_rl_get_resource/bus_generic_rl_set_resource
+ * Provides pointer to resource_list for these routines
+ */
+static struct resource_list *
+obio_get_resource_list(device_t dev, device_t child)
+{
+	struct obio_ivar *ivar;
+
+	ivar = device_get_ivars(child);
+	return (&(ivar->resources));
+}
+
+static device_method_t obio_methods[] = {
+	DEVMETHOD(bus_activate_resource,	obio_activate_resource),
+	DEVMETHOD(bus_add_child,		obio_add_child),
+	DEVMETHOD(bus_alloc_resource,		obio_alloc_resource),
+	DEVMETHOD(bus_deactivate_resource,	obio_deactivate_resource),
+	DEVMETHOD(bus_get_resource_list,	obio_get_resource_list),
+	DEVMETHOD(bus_hinted_child,		obio_hinted_child),
+	DEVMETHOD(bus_release_resource,		obio_release_resource),
+	DEVMETHOD(bus_setup_intr,		obio_setup_intr),
+	DEVMETHOD(bus_teardown_intr,		obio_teardown_intr),
+	DEVMETHOD(device_attach,		obio_attach),
+	DEVMETHOD(device_probe,			obio_probe),
+        DEVMETHOD(bus_get_resource,		bus_generic_rl_get_resource),
+        DEVMETHOD(bus_set_resource,		bus_generic_rl_set_resource),
+
+	{0, 0},
+};
+
+static driver_t obio_driver = {
+	"obio",
+	obio_methods,
+	sizeof(struct obio_softc),
+};
+static devclass_t obio_devclass;
+
+DRIVER_MODULE(obio, nexus, obio_driver, obio_devclass, 0, 0);