Add drivers for the power management devices found on Fireplane/

Safari- and JBus-based machines. Currently the main purpose of
these drivers is debugging of the resource allocation on nexus(4)
and the register content of these devices though.

2 files changed, 358 insertions, 0 deletions

diff --git a/sys/sparc64/sparc64/jbusppm.c b/sys/sparc64/sparc64/jbusppm.c
new file mode 100644
index 0000000..902424c
--- /dev/null
+++ b/sys/sparc64/sparc64/jbusppm.c
@@ -0,0 +1,226 @@
+/*-
+ * Copyright (c) 2008 Marius Strobl <marius@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, 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/kernel.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#define	JBUSPPM_NREG	2
+
+#define	JBUSPPM_DEVID	0
+#define	JBUSPPM_ESTAR	1
+
+#define	JBUSPPM_DEVID_JID		0x00
+#define	JBUSPPM_DEVID_JID_MASTER	0x00040000
+
+#define	JBUSPPM_ESTAR_CTRL		0x00
+#define	JBUSPPM_ESTAR_CTRL_1		0x00000001
+#define	JBUSPPM_ESTAR_CTRL_2		0x00000002
+#define	JBUSPPM_ESTAR_CTRL_32		0x00000020
+#define	JBUSPPM_ESTAR_CTRL_MASK						\
+	(JBUSPPM_ESTAR_CTRL_1 | JBUSPPM_ESTAR_CTRL_2 | JBUSPPM_ESTAR_CTRL_32)
+#define	JBUSPPM_ESTAR_JCHNG		0x08
+#define	JBUSPPM_ESTAR_JCHNG_DELAY_MASK	0x00000007
+#define	JBUSPPM_ESTAR_JCHNG_START	0x00000010
+#define	JBUSPPM_ESTAR_JCHNG_OCCURED	0x00000018
+
+struct jbusppm_softc {
+	struct resource		*sc_res[JBUSPPM_NREG];
+	bus_space_tag_t		sc_bt[JBUSPPM_NREG];
+	bus_space_handle_t	sc_bh[JBUSPPM_NREG];
+};
+
+#define	JBUSPPM_READ(sc, reg, off)					\
+	bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
+#define	JBUSPPM_WRITE(sc, reg, off, val)				\
+	bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
+
+static device_probe_t jbusppm_probe;
+static device_attach_t jbusppm_attach;
+
+static device_method_t jbusppm_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		jbusppm_probe),
+	DEVMETHOD(device_attach,	jbusppm_attach),
+
+	{ NULL, NULL }
+};
+
+static devclass_t jbusppm_devclass;
+
+DEFINE_CLASS_0(jbusppm, jbusppm_driver, jbusppm_methods,
+    sizeof(struct jbusppm_softc));
+DRIVER_MODULE(jbusppm, nexus, jbusppm_driver, jbusppm_devclass, 0, 0);
+
+static int
+jbusppm_probe(device_t dev)
+{
+	const char* compat;
+
+	compat = ofw_bus_get_compat(dev);
+	if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
+	    strcmp(compat, "jbus-ppm") == 0) {
+		device_set_desc(dev, "JBus power management");
+		return (BUS_PROBE_DEFAULT);
+	}
+	return (ENXIO);
+}
+
+static int
+jbusppm_attach(device_t dev)
+{
+	struct jbusppm_softc *sc;
+	int i, rid;
+#if 1
+	device_t *children, tomatillo;
+	u_long tcount, tstart, jcount, jstart;
+	int j, nchildren;
+#endif
+
+	sc = device_get_softc(dev);
+	for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR; i++) {
+		rid = i;
+		/*
+		 * The JBUSPPM_ESTAR resources is shared with that of the
+		 * Tomatillo bus A controller configuration register bank.
+		 */
+#if 0
+		sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+		    &rid, (i == JBUSPPM_ESTAR ? RF_SHAREABLE : 0) | RF_ACTIVE);
+		if (sc->sc_res[i] == NULL) {
+			device_printf(dev,
+			    "could not allocate resource %d\n", i);
+			goto fail;
+		}
+		sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
+		sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
+#else
+		/*
+		 * Workaround for the fact that rman(9) only allows to
+		 * share resources of the same size.
+		 */
+		if (i == JBUSPPM_ESTAR) {
+			if (bus_get_resource(dev, SYS_RES_MEMORY, i, &jstart,
+			    &jcount) != 0) {
+				device_printf(dev,
+				    "could not determine Estar resource\n");
+				goto fail;
+			}
+			if (device_get_children(device_get_parent(dev),
+			    &children, &nchildren) != 0) {
+				device_printf(dev, "could not get children\n");
+				goto fail;
+			}
+			tomatillo = NULL;
+			for (j = 0; j < nchildren; j++) {
+				if (ofw_bus_get_type(children[j]) != NULL &&
+				    strcmp(ofw_bus_get_type(children[j]),
+				    "pci") == 0 &&
+				    ofw_bus_get_compat(children[j]) != NULL &&
+				    strcmp(ofw_bus_get_compat(children[j]),
+				    "pci108e,a801") == 0 &&
+				    ((bus_get_resource_start(children[j],
+				    SYS_RES_MEMORY, 0) >> 20) & 1) == 0) {
+					tomatillo = children[j];
+					break;
+				}
+			}
+			free(children, M_TEMP);
+			if (tomatillo == NULL) {
+				device_printf(dev,
+				    "could not find Tomatillo\n");
+				goto fail;
+			}
+			if (bus_get_resource(tomatillo, SYS_RES_MEMORY, 1,
+			    &tstart, &tcount) != 0) {
+				device_printf(dev,
+				    "could not determine Tomatillo "
+				    "resource\n");
+				goto fail;
+			}
+			sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
+			    &rid, tstart, tstart + tcount - 1, tcount,
+			    RF_SHAREABLE | RF_ACTIVE);
+		} else
+			sc->sc_res[i] = bus_alloc_resource_any(dev,
+			    SYS_RES_MEMORY, &rid, RF_ACTIVE);
+		if (sc->sc_res[i] == NULL) {
+			device_printf(dev,
+			    "could not allocate resource %d\n", i);
+			goto fail;
+		}
+		sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
+		sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
+		if (i == JBUSPPM_ESTAR)
+			bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
+			    jstart - tstart, jcount, &sc->sc_bh[i]);
+#endif
+	}
+
+	if (bootverbose) {
+		if ((JBUSPPM_READ(sc, JBUSPPM_DEVID, JBUSPPM_DEVID_JID) &
+		    JBUSPPM_DEVID_JID_MASTER) != 0)
+			device_printf(dev, "master I/O bridge\n");
+		device_printf(dev, "running at ");
+		switch (JBUSPPM_READ(sc, JBUSPPM_ESTAR, JBUSPPM_ESTAR_CTRL) &
+		    JBUSPPM_ESTAR_CTRL_MASK) {
+		case JBUSPPM_ESTAR_CTRL_1:
+			printf("full");
+			break;
+		case JBUSPPM_ESTAR_CTRL_2:
+			printf("half");
+			break;
+		case JBUSPPM_ESTAR_CTRL_32:
+			printf("1/32");
+			break;
+		default:
+			printf("unknown");
+			break;
+		}
+		printf(" speed\n");
+	}
+
+	return (0);
+
+ fail:
+	for (i = JBUSPPM_DEVID; i <= JBUSPPM_ESTAR && sc->sc_res[i] != NULL;
+	    i++)
+		bus_release_resource(dev, SYS_RES_MEMORY,
+		    rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
+	return (ENXIO);
+}
diff --git a/sys/sparc64/sparc64/schppm.c b/sys/sparc64/sparc64/schppm.c
new file mode 100644
index 0000000..7431062
--- /dev/null
+++ b/sys/sparc64/sparc64/schppm.c
@@ -0,0 +1,132 @@
+/*-
+ * Copyright (c) 2008 Marius Strobl <marius@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, 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/kernel.h>
+#include <sys/module.h>
+#include <sys/resource.h>
+#include <sys/rman.h>
+
+#include <dev/ofw/ofw_bus.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#define	SCHPPM_NREG	1
+
+#define	SCHPPM_ESTAR	0
+
+#define	SCHPPM_ESTAR_CTRL		0x00
+#define	SCHPPM_ESTAR_CTRL_1		0x00000001
+#define	SCHPPM_ESTAR_CTRL_2		0x00000002
+#define	SCHPPM_ESTAR_CTRL_32		0x00000020
+#define	SCHPPM_ESTAR_CTRL_MASK						\
+	(SCHPPM_ESTAR_CTRL_1 | SCHPPM_ESTAR_CTRL_2 | SCHPPM_ESTAR_CTRL_32)
+
+static struct resource_spec schppm_res_spec[] = {
+	{ SYS_RES_MEMORY, SCHPPM_ESTAR, RF_ACTIVE },
+	{ -1, 0 }
+};
+
+struct schppm_softc {
+	struct resource		*sc_res[SCHPPM_NREG];
+};
+
+#define	SCHPPM_READ(sc, reg, off)					\
+	bus_read_8((sc)->sc_res[(reg)], (off))
+#define	SCHPPM_WRITE(sc, reg, off, val)					\
+	bus_write_8((sc)->sc_res[(reg)], (off), (val))
+
+static device_probe_t schppm_probe;
+static device_attach_t schppm_attach;
+
+static device_method_t schppm_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		schppm_probe),
+	DEVMETHOD(device_attach,	schppm_attach),
+
+	{ NULL, NULL }
+};
+
+static devclass_t schppm_devclass;
+
+DEFINE_CLASS_0(schppm, schppm_driver, schppm_methods,
+    sizeof(struct schppm_softc));
+DRIVER_MODULE(schppm, nexus, schppm_driver, schppm_devclass, 0, 0);
+
+static int
+schppm_probe(device_t dev)
+{
+	const char* compat;
+
+	compat = ofw_bus_get_compat(dev);
+	if (compat != NULL && strcmp(ofw_bus_get_name(dev), "ppm") == 0 &&
+	    strcmp(compat, "gp2-ppm") == 0) {
+		device_set_desc(dev, "Schizo power management");
+		return (BUS_PROBE_DEFAULT);
+	}
+	return (ENXIO);
+}
+
+static int
+schppm_attach(device_t dev)
+{
+	struct schppm_softc *sc;
+
+	sc = device_get_softc(dev);
+	if (bus_alloc_resources(dev, schppm_res_spec, sc->sc_res)) {
+		device_printf(dev, "failed to allocate resources\n");
+		bus_release_resources(dev, schppm_res_spec, sc->sc_res);
+		return (ENXIO);
+	}
+
+	if (bootverbose) {
+		device_printf(dev, "running at ");
+		switch (SCHPPM_READ(sc, SCHPPM_ESTAR, SCHPPM_ESTAR_CTRL) &
+		    SCHPPM_ESTAR_CTRL_MASK) {
+		case SCHPPM_ESTAR_CTRL_1:
+			printf("full");
+			break;
+		case SCHPPM_ESTAR_CTRL_2:
+			printf("half");
+			break;
+		case SCHPPM_ESTAR_CTRL_32:
+			printf("1/32");
+			break;
+		default:
+			printf("unknown");
+			break;
+		}
+		printf(" speed\n");
+	}
+
+	return (0);
+}