Add drivers for the central and fhc busses found in enterprise class

UltraSPARCs, and an eeprom attachment for fhc, which allows the date
to be set properly on these machines.  Central is a wierd bus which
seems to only ever have 1 fhc attached to it.   FHC (FireHose Controller)
is another wierd bus with various things on it depending where its attached.
The fhc attached to central has eeprom and zs, and the fhcs which attach
directly to nexus have simm-status, environment and other nodes, none of
which I'll probably ever have documentation for.

Thanks to Ade Lovett for providing access to an 8 cpu e4500.

2 files changed, 278 insertions, 0 deletions

diff --git a/sys/sparc64/central/central.c b/sys/sparc64/central/central.c
new file mode 100644
index 0000000..e3f364d
--- /dev/null
+++ b/sys/sparc64/central/central.c
@@ -0,0 +1,231 @@
+/*-
+ * Copyright (c) 2003 Jake Burkholder.
+ * 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, 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/bus.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+
+#include <dev/ofw/openfirm.h>
+
+#include <machine/bus.h>
+#include <machine/nexusvar.h>
+#include <machine/ofw_upa.h>
+#include <machine/resource.h>
+
+#include <sys/rman.h>
+
+#include <sparc64/central/centralvar.h>
+#include <sparc64/sbus/ofw_sbus.h>
+#include <sparc64/sbus/sbusreg.h>
+
+struct central_devinfo {
+	char			*cdi_name;
+	char			*cdi_type;
+	phandle_t		cdi_node;
+};
+
+struct central_softc {
+	phandle_t		sc_node;
+	int			sc_nrange;
+	struct sbus_ranges	*sc_ranges;
+};
+
+static int central_probe(device_t dev);
+static int central_attach(device_t dev);
+
+static void central_probe_nomatch(device_t dev, device_t child);
+static int central_read_ivar(device_t, device_t, int, uintptr_t *);
+static int central_write_ivar(device_t, device_t, int, uintptr_t);
+static struct resource *central_alloc_resource(device_t, device_t, int, int *,
+    u_long, u_long, u_long, u_int);
+
+static device_method_t central_methods[] = {
+	/* Device interface. */
+	DEVMETHOD(device_probe,		central_probe),
+	DEVMETHOD(device_attach,	central_attach),
+
+	/* Bus interface. */
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_probe_nomatch,	central_probe_nomatch),
+	DEVMETHOD(bus_read_ivar,	central_read_ivar),
+	DEVMETHOD(bus_write_ivar,	central_write_ivar),
+	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
+	DEVMETHOD(bus_alloc_resource,	central_alloc_resource),
+	DEVMETHOD(bus_release_resource,	bus_generic_release_resource),
+	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+
+	{ NULL, NULL }
+};
+
+static driver_t central_driver = {
+	"central",
+	central_methods,
+	sizeof(struct central_softc),
+};
+
+static devclass_t central_devclass;
+
+DRIVER_MODULE(central, nexus, central_driver, central_devclass, 0, 0);
+
+static int
+central_probe(device_t dev)
+{
+
+	if (strcmp(nexus_get_name(dev), "central") == 0) {
+		device_set_desc(dev, "central");
+		return (0);
+	}
+	return (ENXIO);
+}
+
+static int
+central_attach(device_t dev)
+{
+	struct central_devinfo *cdi;
+	struct central_softc *sc;
+	phandle_t child;
+	phandle_t node;
+	device_t cdev;
+	char *name;
+
+	sc = device_get_softc(dev);
+	node = nexus_get_node(dev);
+	sc->sc_node = node;
+
+	sc->sc_nrange = OF_getprop_alloc(node, "ranges",
+	    sizeof(*sc->sc_ranges), (void **)&sc->sc_ranges);
+	if (sc->sc_nrange == -1) {
+		device_printf(dev, "can't get ranges");
+		return (ENXIO);
+	}
+
+	for (child = OF_child(node); child != 0; child = OF_peer(child)) {
+		if ((OF_getprop_alloc(child, "name", 1, (void **)&name)) == -1)
+			continue;
+		cdev = device_add_child(dev, NULL, -1);
+		if (cdev != NULL) {
+			cdi = malloc(sizeof(*cdi), M_DEVBUF, M_ZERO);
+			cdi->cdi_name = name;
+			cdi->cdi_node = child;
+			OF_getprop_alloc(child, "device_type", 1,
+			    (void **)&cdi->cdi_type);
+			device_set_ivars(cdev, cdi);
+		} else
+			free(name, M_OFWPROP);
+	}
+
+	return (bus_generic_attach(dev));
+}
+
+static void
+central_probe_nomatch(device_t dev, device_t child)
+{
+	struct central_devinfo *cdi;
+
+	cdi = device_get_ivars(child);
+	device_printf(dev, "<%s> type %s (no driver attached)\n",
+	    cdi->cdi_name, cdi->cdi_type != NULL ? cdi->cdi_type : "unknown");
+}
+
+static int
+central_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+{
+	struct central_devinfo *cdi;
+
+	if ((cdi = device_get_ivars(child)) == 0)
+		return (ENOENT);
+	switch (which) {
+	case CENTRAL_IVAR_NAME:
+		*result = (uintptr_t)cdi->cdi_name;
+		break;
+	case CENTRAL_IVAR_NODE:
+		*result = cdi->cdi_node;
+		break;
+	case CENTRAL_IVAR_TYPE:
+		*result = (uintptr_t)cdi->cdi_type;
+		break;
+	default:
+		return (ENOENT);
+	}
+	return (0);
+}
+
+static int
+central_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
+{
+	struct central_devinfo *cdi;
+
+	if ((cdi = device_get_ivars(child)) == 0)
+		return (ENOENT);
+	switch (which) {
+	case CENTRAL_IVAR_NAME:
+	case CENTRAL_IVAR_NODE:
+	case CENTRAL_IVAR_TYPE:
+		return (EINVAL);
+	default:
+		return (ENOENT);
+	}
+	return (0);
+}
+
+static struct resource *
+central_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 central_softc *sc;
+	struct resource *res;
+	bus_addr_t coffset;
+	bus_addr_t cend;
+	bus_addr_t phys;
+	int i;
+
+	if (type != SYS_RES_MEMORY) {
+		return (bus_generic_alloc_resource(bus, child, type, rid,
+		    start, end, count, flags));
+	}
+	res = NULL;
+	sc = device_get_softc(bus);
+	for (i = 0; i < sc->sc_nrange; i++) {
+		coffset = sc->sc_ranges[i].coffset;
+		cend = coffset + sc->sc_ranges[i].size - 1;
+		if (start >= coffset && end <= cend) {
+			start -= coffset;
+			end -= coffset;
+			phys = sc->sc_ranges[i].poffset |
+			    ((bus_addr_t)sc->sc_ranges[i].pspace << 32);
+			res = bus_generic_alloc_resource(bus, child, type,
+			    rid, phys + start, phys + end, count, flags);
+			break;
+		}
+	}
+	return (res);
+}
diff --git a/sys/sparc64/central/centralvar.h b/sys/sparc64/central/centralvar.h
new file mode 100644
index 0000000..a3b03c6
--- /dev/null
+++ b/sys/sparc64/central/centralvar.h
@@ -0,0 +1,47 @@
+/*-
+ * Copyright (c) 2003 Jake Burkholder.
+ * 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, 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SPARC64_CENTRAL_CENTRALVAR_H_
+#define	_SPARC64_CENTRAL_CENTRALVAR_H_
+
+enum central_device_ivars {
+	CENTRAL_IVAR_NAME,
+	CENTRAL_IVAR_NODE,
+	CENTRAL_IVAR_TYPE
+};
+
+#define	CENTRAL_ACCESSOR(var, ivar, type) \
+	__BUS_ACCESSOR(central, var, CENTRAL, ivar, type)
+
+CENTRAL_ACCESSOR(name,	NAME,	char *)
+CENTRAL_ACCESSOR(node,	NODE,	phandle_t)
+CENTRAL_ACCESSOR(type,	TYPE,	char *)
+
+#undef CENTRAL_ACCESSOR
+
+#endif