- Revert changes accidentally killed by merge operation

1 files changed, 433 insertions, 0 deletions

diff --git a/sys/mips/atheros/apb.c b/sys/mips/atheros/apb.c
new file mode 100644
index 0000000..d53408c
--- /dev/null
+++ b/sys/mips/atheros/apb.c
@@ -0,0 +1,433 @@
+/*-
+ * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@FreeBSD.org>
+ * All rights reserved.
+ *
+ * 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 unmodified, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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/atheros/apbvar.h>
+#include <mips/atheros/ar71xxreg.h>
+
+#undef APB_DEBUG
+#ifdef APB_DEBUG
+#define dprintf printf
+#else 
+#define dprintf(x, arg...)
+#endif  /* APB_DEBUG */
+
+static int	apb_activate_resource(device_t, device_t, int, int,
+		    struct resource *);
+static device_t	apb_add_child(device_t, int, const char *, int);
+static struct resource *
+		apb_alloc_resource(device_t, device_t, int, int *, u_long,
+		    u_long, u_long, u_int);
+static int	apb_attach(device_t);
+static int	apb_deactivate_resource(device_t, device_t, int, int,
+		    struct resource *);
+static struct resource_list *
+		apb_get_resource_list(device_t, device_t);
+static void	apb_hinted_child(device_t, const char *, int);
+static int	apb_intr(void *);
+static int	apb_probe(device_t);
+static int	apb_release_resource(device_t, device_t, int, int,
+		    struct resource *);
+static int	apb_setup_intr(device_t, device_t, struct resource *, int,
+		    driver_filter_t *, driver_intr_t *, void *, void **);
+static int	apb_teardown_intr(device_t, device_t, struct resource *,
+		    void *);
+
+static void apb_mask_irq(unsigned int irq)
+{
+	uint32_t reg;
+
+	reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK);
+	ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg & ~(1 << irq));
+
+}
+
+static void apb_unmask_irq(unsigned int irq)
+{
+	uint32_t reg;
+
+	reg = ATH_READ_REG(AR71XX_MISC_INTR_MASK);
+	ATH_WRITE_REG(AR71XX_MISC_INTR_MASK, reg | (1 << irq));
+}
+
+static int
+apb_probe(device_t dev)
+{
+
+	return (0);
+}
+
+static int
+apb_attach(device_t dev)
+{
+	struct apb_softc *sc = device_get_softc(dev);
+	int rid = 0;
+
+	device_set_desc(dev, "APB Bus bridge");
+	sc->apb_irq_rman.rm_type = RMAN_ARRAY;
+	sc->apb_irq_rman.rm_descr = "APB IRQ";
+
+	if (rman_init(&sc->apb_irq_rman) != 0 ||
+	    rman_manage_region(&sc->apb_irq_rman, 
+			APB_IRQ_BASE, APB_IRQ_END) != 0)
+		panic("apb_attach: failed to set up IRQ rman");
+
+	if ((sc->sc_misc_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 
+	    RF_SHAREABLE | RF_ACTIVE)) == NULL) {
+		device_printf(dev, "unable to allocate IRQ resource\n");
+		return (ENXIO);
+	}
+
+	if ((bus_setup_intr(dev, sc->sc_misc_irq, INTR_TYPE_MISC, 
+	    apb_intr, NULL, sc, &sc->sc_misc_ih))) {
+		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 *
+apb_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 apb_softc		*sc = device_get_softc(bus);
+	struct apb_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;
+	/*
+	 * Pass memory requests to nexus device
+	 */
+	passthrough = (device_get_parent(child) != bus) ||
+		(type == SYS_RES_MEMORY);
+	rle = NULL;
+
+	dprintf("%s: entry (%p, %p, %d, %p, %p, %p, %ld, %d)\n",
+	    __func__, bus, child, type, rid, (void *)(intptr_t)start,
+	    (void *)(intptr_t)end, count, flags);
+
+	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;
+
+		dprintf("%s: default resource (%p, %p, %ld)\n",
+		    __func__, (void *)(intptr_t)start,
+		    (void *)(intptr_t)end, count);
+	}
+
+	switch (type) {
+	case SYS_RES_IRQ:
+		rm = &sc->apb_irq_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
+apb_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
+apb_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
+apb_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 = apb_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
+apb_setup_intr(device_t bus, device_t child, struct resource *ires,
+		int flags, driver_filter_t *filt, driver_intr_t *handler,
+		void *arg, void **cookiep)
+{
+	struct apb_softc *sc = device_get_softc(bus);
+	struct intr_event *event;
+	int irq, error;
+
+	irq = rman_get_start(ires);
+
+	if (irq > APB_IRQ_END)
+		panic("%s: bad irq %d", __func__, irq);
+
+	event = sc->sc_eventstab[irq];
+	if (event == NULL) {
+		error = intr_event_create(&event, (void *)irq, 0, irq, 
+		    (mask_fn)apb_mask_irq, (mask_fn)apb_unmask_irq,
+		    NULL, NULL,
+		    "apb 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);
+
+	return (0);
+}
+
+static int
+apb_teardown_intr(device_t dev, device_t child, struct resource *ires,
+    void *cookie)
+{
+	struct apb_softc *sc = device_get_softc(dev);
+	int irq, result;
+
+	irq = rman_get_start(ires);
+	if (irq > APB_IRQ_END)
+		panic("%s: bad irq %d", __func__, irq);
+
+	if (sc->sc_eventstab[irq] == NULL)
+		panic("Trying to teardown unoccupied IRQ");
+
+	apb_mask_irq(irq);
+
+	result = intr_event_remove_handler(cookie);
+	if (!result)
+		sc->sc_eventstab[irq] = NULL;
+
+	return (result);
+}
+
+static int
+apb_intr(void *arg)
+{
+	struct apb_softc *sc = arg;
+	struct intr_event *event;
+	uint32_t reg, irq;
+
+	reg = ATH_READ_REG(AR71XX_MISC_INTR_STATUS);
+	for (irq = 0; irq < APB_NIRQS; irq++) {
+		if (reg & (1 << irq)) {
+			event = sc->sc_eventstab[irq];
+			if (!event || TAILQ_EMPTY(&event->ie_handlers)) {
+				printf("Stray IRQ %d\n", irq);
+				continue;
+			}
+
+			/* TODO: frame instead of NULL? */
+			intr_event_handle(event, NULL);
+		}
+	}
+
+	return (FILTER_HANDLED);
+}
+
+static void
+apb_hinted_child(device_t bus, const char *dname, int dunit)
+{
+	device_t		child;
+	long			maddr;
+	int			msize;
+	int			irq;
+	int			result;
+	int			mem_hints_count;
+
+	child = BUS_ADD_CHILD(bus, 0, dname, dunit);
+
+	/*
+	 * Set hard-wired resources for hinted child using
+	 * specific RIDs.
+	 */
+	mem_hints_count = 0;
+	if (resource_long_value(dname, dunit, "maddr", &maddr) == 0)
+		mem_hints_count++;
+	if (resource_int_value(dname, dunit, "msize", &msize) == 0)
+		mem_hints_count++;
+
+	/* check if all info for mem resource has been provided */
+	if ((mem_hints_count > 0) && (mem_hints_count < 2)) {
+		printf("Either maddr or msize hint is missing for %s%d\n",
+		    dname, dunit);
+	} else if (mem_hints_count) {
+		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
+apb_add_child(device_t bus, int order, const char *name, int unit)
+{
+	device_t		child;
+	struct apb_ivar	*ivar;
+
+	ivar = malloc(sizeof(struct apb_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 *
+apb_get_resource_list(device_t dev, device_t child)
+{
+	struct apb_ivar *ivar;
+
+	ivar = device_get_ivars(child);
+	return (&(ivar->resources));
+}
+
+static device_method_t apb_methods[] = {
+	DEVMETHOD(bus_activate_resource,	apb_activate_resource),
+	DEVMETHOD(bus_add_child,		apb_add_child),
+	DEVMETHOD(bus_alloc_resource,		apb_alloc_resource),
+	DEVMETHOD(bus_deactivate_resource,	apb_deactivate_resource),
+	DEVMETHOD(bus_get_resource_list,	apb_get_resource_list),
+	DEVMETHOD(bus_hinted_child,		apb_hinted_child),
+	DEVMETHOD(bus_print_child,		bus_generic_print_child),
+	DEVMETHOD(bus_release_resource,		apb_release_resource),
+	DEVMETHOD(bus_setup_intr,		apb_setup_intr),
+	DEVMETHOD(bus_teardown_intr,		apb_teardown_intr),
+	DEVMETHOD(device_attach,		apb_attach),
+	DEVMETHOD(device_probe,			apb_probe),
+	DEVMETHOD(bus_get_resource,		bus_generic_rl_get_resource),
+	DEVMETHOD(bus_set_resource,		bus_generic_rl_set_resource),
+
+	{0, 0},
+};
+
+static driver_t apb_driver = {
+	"apb",
+	apb_methods,
+	sizeof(struct apb_softc),
+};
+static devclass_t apb_devclass;
+
+DRIVER_MODULE(apb, nexus, apb_driver, apb_devclass, 0, 0);