driver for the "central" controller on the E4500 (and others) [fhc and others to follow]

2 files changed, 262 insertions, 0 deletions

diff --git a/sys/arch/sparc64/dev/central.c b/sys/arch/sparc64/dev/central.c
new file mode 100644
index 00000000000..5bf2b7d5177
--- /dev/null
+++ b/sys/arch/sparc64/dev/central.c
@@ -0,0 +1,210 @@
+/*	$OpenBSD: central.c,v 1.1 2004/09/22 21:31:51 jason Exp $	*/
+
+/*
+ * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
+ * 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 ``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 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/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/conf.h>
+#include <sys/timeout.h>
+#include <sys/malloc.h>
+
+#include <machine/bus.h>
+#include <machine/autoconf.h>
+#include <machine/openfirm.h>
+
+#include <sparc64/dev/centralvar.h>
+
+struct central_softc {
+	struct device sc_dv;
+	bus_space_tag_t sc_bt;
+	bus_space_tag_t sc_cbt;
+	int sc_node;
+	int sc_nrange;
+	struct central_range *sc_range;
+};
+
+int central_match(struct device *, void *, void *);
+void central_attach(struct device *, struct device *, void *);
+
+int central_print(void *, const char *);
+int central_get_string(int, char *, char **);
+
+bus_space_tag_t central_alloc_bus_tag(struct central_softc *);
+int _central_bus_map(bus_space_tag_t, bus_space_tag_t, bus_addr_t, bus_size_t,
+    int, bus_space_handle_t *);
+
+int
+central_match(parent, match, aux)
+	struct device *parent;
+	void *match, *aux;
+{
+	struct mainbus_attach_args *ma = aux;
+
+	if (strcmp(ma->ma_name, "central") == 0)
+		return (1);
+	return (0);
+}
+
+void
+central_attach(parent, self, aux)
+	struct device *parent, *self;
+	void *aux;
+{
+	struct central_softc *sc = (struct central_softc *)self;
+	struct mainbus_attach_args *ma = aux;
+	int node0, node;
+
+	sc->sc_bt = ma->ma_bustag;
+	sc->sc_node = ma->ma_node;
+	sc->sc_cbt = central_alloc_bus_tag(sc);
+
+	getprop(sc->sc_node, "ranges", sizeof(struct central_range),
+	    &sc->sc_nrange, (void **)&sc->sc_range);
+
+	printf("\n");
+
+	node0 = firstchild(sc->sc_node);
+	for (node = node0; node; node = nextsibling(node)) {
+		struct central_attach_args ca;
+
+		bzero(&ca, sizeof(ca));
+		ca.ca_node = node;
+		ca.ca_bustag = sc->sc_cbt;
+		if (central_get_string(ca.ca_node, "name", &ca.ca_name)) {
+			printf("can't fetch name for node 0x%x\n", node);
+			continue;
+		}
+
+		getprop(node, "reg", sizeof(struct central_reg),
+		    &ca.ca_nreg, (void **)&ca.ca_reg);
+
+		(void)config_found(&sc->sc_dv, (void *)&ca, central_print);
+
+		if (ca.ca_name != NULL)
+			free(ca.ca_name, M_DEVBUF);
+	}
+}
+
+int
+central_get_string(int node, char *name, char **buf)
+{
+	int len;
+
+	len = getproplen(node, name);
+	if (len < 0)
+		return (len);
+	*buf = (char *)malloc(len + 1, M_DEVBUF, M_NOWAIT);
+	if (buf == NULL)
+		return (-1);
+
+	if (len != 0)
+		getpropstringA(node, name, *buf);
+	(*buf)[len] = '\0';
+	return (0);
+}
+
+int
+central_print(void *args, const char *busname)
+{
+	struct central_attach_args *ca = args;
+	char *class;
+
+	if (busname != NULL) {
+		printf("%s at %s", ca->ca_name, busname);
+		class = getpropstring(ca->ca_node, "device_type");
+		if (*class != '\0')
+			printf(" class %s", class);
+	}
+	return (UNCONF);
+}
+
+bus_space_tag_t
+central_alloc_bus_tag(struct central_softc *sc)
+{
+	struct sparc_bus_space_tag *bt;
+
+	bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT);
+	if (bt == NULL)
+		panic("central: couldn't alloc bus tag");
+
+	bzero(bt, sizeof(*bt));
+	snprintf(bt->name, sizeof(bt->name), "%s", sc->sc_dv.dv_xname);
+	bt->cookie = sc;
+	bt->parent = sc->sc_bt;
+	bt->asi = bt->parent->asi;
+	bt->sasi = bt->parent->sasi;
+	bt->sparc_bus_map = _central_bus_map;
+	/* XXX bt->sparc_bus_mmap = central_bus_mmap; */
+	/* XXX bt->sparc_intr_establish = upa_intr_establish; */
+	return (bt);
+}
+
+int
+_central_bus_map(bus_space_tag_t t, bus_space_tag_t t0, bus_addr_t addr,
+    bus_size_t size, int flags, bus_space_handle_t *hp)
+{
+	struct central_softc *sc = t->cookie;
+	int64_t slot = BUS_ADDR_IOSPACE(addr);
+	int64_t offset = BUS_ADDR_PADDR(addr);
+	int i;
+
+	if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
+		printf("\ncentral_bus_map: invalid parent");
+		return (EINVAL);
+	}
+
+	if (flags & BUS_SPACE_MAP_PROMADDRESS)
+		return ((*t->parent->sparc_bus_map)(t, t0, addr,
+		    size, flags, hp));
+
+	for (i = 0; i < sc->sc_nrange; i++) {
+		bus_addr_t paddr;
+
+		if (sc->sc_range[i].cspace != slot)
+			continue;
+
+		paddr = offset - sc->sc_range[i].coffset;
+		paddr += sc->sc_range[i].poffset;
+		paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
+		return ((*t->parent->sparc_bus_map)(t, t0, paddr,
+		    size, flags, hp));
+	}
+
+	return (EINVAL);
+}
+
+struct cfattach central_ca = {
+	sizeof(struct central_softc), central_match, central_attach
+};
+
+struct cfdriver central_cd = {
+	NULL, "central", DV_DULL
+};
+
diff --git a/sys/arch/sparc64/dev/centralvar.h b/sys/arch/sparc64/dev/centralvar.h
new file mode 100644
index 00000000000..72816f1f42c
--- /dev/null
+++ b/sys/arch/sparc64/dev/centralvar.h
@@ -0,0 +1,52 @@
+/*	$OpenBSD: centralvar.h,v 1.1 2004/09/22 21:31:51 jason Exp $	*/
+
+/*
+ * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
+ * 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 ``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 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.
+ */
+
+struct central_reg {
+	u_int32_t	cbr_slot;
+	u_int32_t	cbr_offset;
+	u_int32_t	cbr_size;
+};
+
+struct central_attach_args {
+	char *ca_name;
+	bus_space_tag_t ca_bustag;
+	struct central_reg *ca_reg;
+	int ca_node;
+	int ca_nreg;
+};
+
+struct central_range {
+	u_int32_t	cspace;		/* Client space */
+	u_int32_t	coffset;	/* Client offset */
+	u_int32_t	pspace;		/* Parent space */
+	u_int32_t	poffset;	/* Parent offset */
+	u_int32_t	size;		/* Size in bytes of this range */ 
+};
+
+#define	central_bus_map(t, slot, offset, sz, flags, hp)		\
+    bus_space_map(t, BUS_ADDR(slot, offset), sz, flags, hp)