Add a driver for the Local Bus Controller.

Obtained from:	Juniper Networks, Inc.

2 files changed, 368 insertions, 0 deletions

diff --git a/sys/powerpc/mpc85xx/lbc.c b/sys/powerpc/mpc85xx/lbc.c
new file mode 100644
index 0000000..4b168b8
--- /dev/null
+++ b/sys/powerpc/mpc85xx/lbc.c
@@ -0,0 +1,328 @@
+/*-
+ * Copyright (c) 2006-2008, Juniper Networks, Inc.
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/ktr.h>
+#include <sys/kernel.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <machine/bus.h>
+#include <machine/ocpbus.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+
+#include <powerpc/mpc85xx/lbc.h>
+
+struct lbc_softc {
+	device_t		sc_dev;
+
+	struct resource		*sc_res;
+	bus_space_handle_t	sc_bsh;
+	bus_space_tag_t		sc_bst;
+	int			sc_rid;
+
+	struct rman		sc_rman;
+	uintptr_t		sc_kva;
+};
+
+struct lbc_devinfo {
+	int		lbc_devtype;
+	int		lbc_memtype;
+	/* Also the BAR number */
+	int		lbc_unit;
+};
+
+static int lbc_probe(device_t);
+static int lbc_attach(device_t);
+static int lbc_shutdown(device_t);
+static int lbc_get_resource(device_t, device_t, int, int, u_long *,
+    u_long *);
+static struct resource *lbc_alloc_resource(device_t, device_t, int, int *,
+    u_long, u_long, u_long, u_int);
+static int lbc_print_child(device_t, device_t);
+static int lbc_release_resource(device_t, device_t, int, int,
+    struct resource *);
+static int lbc_read_ivar(device_t, device_t, int, uintptr_t *);
+
+/*
+ * Bus interface definition
+ */
+static device_method_t lbc_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		lbc_probe),
+	DEVMETHOD(device_attach,	lbc_attach),
+	DEVMETHOD(device_shutdown,	lbc_shutdown),
+
+	/* Bus interface */
+	DEVMETHOD(bus_print_child,	lbc_print_child),
+	DEVMETHOD(bus_read_ivar,	lbc_read_ivar),
+	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
+	DEVMETHOD(bus_teardown_intr,	NULL),
+
+	DEVMETHOD(bus_get_resource,	NULL),
+	DEVMETHOD(bus_alloc_resource,	lbc_alloc_resource),
+	DEVMETHOD(bus_release_resource,	lbc_release_resource),
+	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+
+	{ 0, 0 }
+};
+
+static driver_t lbc_driver = {
+	"lbc",
+	lbc_methods,
+	sizeof(struct lbc_softc)
+};
+devclass_t lbc_devclass;
+DRIVER_MODULE(lbc, ocpbus, lbc_driver, lbc_devclass, 0, 0);
+
+static device_t
+lbc_mk_child(device_t dev, int type, int mtype, int unit)
+{
+	struct lbc_devinfo *dinfo;
+	device_t child;
+
+	child = device_add_child(dev, NULL, -1);
+	if (child == NULL) {
+		device_printf(dev, "could not add child device\n");
+		return (NULL);
+	}
+	dinfo = malloc(sizeof(struct lbc_devinfo), M_DEVBUF, M_WAITOK | M_ZERO);
+	dinfo->lbc_devtype = type;
+	dinfo->lbc_memtype = mtype;
+	dinfo->lbc_unit = unit;
+	device_set_ivars(child, dinfo);
+	return (child);
+}
+
+static int
+lbc_probe(device_t dev)
+{
+	device_t parent;
+	uintptr_t devtype;
+	int error;
+
+	parent = device_get_parent(dev);
+	error = BUS_READ_IVAR(parent, dev, OCPBUS_IVAR_DEVTYPE, &devtype);
+	if (error)
+		return (error);
+	if (devtype != OCPBUS_DEVTYPE_LBC)
+		return (ENXIO);
+
+	device_set_desc(dev, "Freescale MPC85xx Local Bus Controller");
+	return (BUS_PROBE_DEFAULT);
+}
+
+static int
+lbc_attach(device_t dev)
+{
+	struct lbc_softc *sc;
+	struct rman *rm;
+	u_long start, size;
+	int error;
+
+	sc = device_get_softc(dev);
+	sc->sc_dev = dev;
+
+	sc->sc_rid = 0;
+	sc->sc_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->sc_rid,
+	    RF_ACTIVE);
+	if (sc->sc_res == NULL)
+		return (ENXIO);
+
+	sc->sc_bst = rman_get_bustag(sc->sc_res);
+	sc->sc_bsh = rman_get_bushandle(sc->sc_res);
+
+	error = bus_get_resource(dev, SYS_RES_MEMORY, 1, &start, &size);
+	if (error)
+		goto fail;
+
+	rm = &sc->sc_rman;
+	rm->rm_type = RMAN_ARRAY;
+	rm->rm_descr = "MPC85XX Local Bus Space";
+	rm->rm_start = start;
+	rm->rm_end = start + size - 1;
+	error = rman_init(rm);
+	if (error)
+		goto fail;
+
+	error = rman_manage_region(rm, rm->rm_start, rm->rm_end);
+	if (error) {
+		rman_fini(rm);
+		goto fail;
+	}
+
+	sc->sc_kva = (uintptr_t)pmap_mapdev(start, size);
+
+	lbc_mk_child(dev, LBC_DEVTYPE_CFI, 0, 0);
+
+	return (bus_generic_attach(dev));
+
+ fail:
+	bus_release_resource(dev, SYS_RES_MEMORY, sc->sc_rid, sc->sc_res);
+	return (error);
+}
+
+static int
+lbc_shutdown(device_t dev)
+{
+
+	/* TODO */
+	return(0);
+}
+
+static struct resource *
+lbc_alloc_resource(device_t dev, device_t child, int type, int *rid,
+    u_long start, u_long end, u_long count, u_int flags)
+{
+	struct lbc_softc *sc;
+	struct resource *rv;
+	struct rman *rm;
+	int error;
+
+	sc = device_get_softc(dev);
+
+	if (type != SYS_RES_MEMORY && type != SYS_RES_IRQ)
+		return (NULL);
+
+	/* We only support default allocations. */
+	if (start != 0ul || end != ~0ul)
+		return (NULL);
+
+	if (type == SYS_RES_IRQ)
+		return (bus_alloc_resource(dev, type, rid, start, end, count,
+		    flags));
+
+	error = lbc_get_resource(dev, child, type, *rid, &start, &count);
+	if (error)
+		return (NULL);
+
+	rm = &sc->sc_rman;
+	end = start + count - 1;
+	rv = rman_reserve_resource(rm, start, end, count, flags, child);
+	if (rv != NULL) {
+		rman_set_bustag(rv, &bs_be_tag);
+		rman_set_bushandle(rv, sc->sc_kva + rman_get_start(rv) -
+		    rm->rm_start);
+	}
+	return (rv);
+}
+
+static int
+lbc_print_child(device_t dev, device_t child)
+{
+	u_long size, start;
+	int error, retval, rid;
+
+	retval = bus_print_child_header(dev, child);
+
+	rid = 0;
+	while (1) {
+		error = lbc_get_resource(dev, child, SYS_RES_MEMORY, rid,
+		    &start, &size);
+		if (error)
+			break;
+		retval += (rid == 0) ? printf(" iomem ") : printf(",");
+		retval += printf("%#lx", start);
+		if (size > 1)
+			retval += printf("-%#lx", start + size - 1);
+		rid++;
+	}
+
+	retval += bus_print_child_footer(dev, child);
+	return (retval);
+}
+
+static int
+lbc_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
+{
+	struct lbc_devinfo *dinfo;
+
+	if (device_get_parent(child) != dev)
+		return (EINVAL);
+
+	dinfo = device_get_ivars(child);
+
+	switch (index) {
+	case LBC_IVAR_DEVTYPE:
+		*result = dinfo->lbc_devtype;
+		return (0);
+	case LBC_IVAR_CLOCK:
+		*result = 1843200;
+		return (0);
+	case LBC_IVAR_REGSHIFT:
+		*result = 0;
+		return (0);
+	default:
+		break;
+	}
+	return (EINVAL);
+}
+
+static int
+lbc_release_resource(device_t dev, device_t child, int type, int rid,
+    struct resource *res)
+{
+
+	return (rman_release_resource(res));
+}
+
+static int
+lbc_get_resource(device_t dev, device_t child, int type, int rid,
+    u_long *startp, u_long *countp)
+{
+	struct lbc_softc *sc;
+	struct lbc_devinfo *dinfo;
+
+	if (type != SYS_RES_MEMORY)
+		return (ENOENT);
+
+	/* Currently all devices have a single RID per type. */
+	if (rid != 0)
+		return (ENOENT);
+
+	sc = device_get_softc(dev);
+	dinfo = device_get_ivars(child);
+
+	switch (dinfo->lbc_devtype) {
+	case LBC_DEVTYPE_CFI:
+		*startp = sc->sc_rman.rm_start;
+		*countp = sc->sc_rman.rm_end - sc->sc_rman.rm_start + 1;
+		break;
+	default:
+		return(EDOOFUS);
+	}
+	return(0);
+}
diff --git a/sys/powerpc/mpc85xx/lbc.h b/sys/powerpc/mpc85xx/lbc.h
new file mode 100644
index 0000000..8bc7843
--- /dev/null
+++ b/sys/powerpc/mpc85xx/lbc.h
@@ -0,0 +1,40 @@
+/*-
+ * Copyright (c) 2006-2008, Juniper Networks, Inc.
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _MACHINE_LBC_H_
+#define	_MACHINE_LBC_H_
+
+#define	LBC_IVAR_DEVTYPE	1
+#define	LBC_IVAR_CLOCK		2
+#define	LBC_IVAR_REGSHIFT	3
+
+/* Device types. */
+#define	LBC_DEVTYPE_CFI		1
+#define	LBC_DEVTYPE_UART	2
+
+#endif /* _MACHINE_LBC_H_ */