New driver for watchdog time on NatSemi PC87317 SuperIO chip.

1 files changed, 119 insertions, 0 deletions

diff --git a/sys/arch/sparc64/dev/pmc.c b/sys/arch/sparc64/dev/pmc.c
new file mode 100644
index 00000000000..6c4bee7a600
--- /dev/null
+++ b/sys/arch/sparc64/dev/pmc.c
@@ -0,0 +1,119 @@
+/*	$OpenBSD: pmc.c,v 1.1 2007/04/10 19:03:10 kettenis Exp $	*/
+
+/*
+ * Copyright (c) 2007 Mark Kettenis
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Driver for watchdog device on Blade 1000, Fire 280R, Fire V480 etc.
+ */
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/device.h>
+#include <sys/malloc.h>
+#include <sys/systm.h>
+
+#include <machine/bus.h>
+#include <machine/autoconf.h>
+
+#include <sparc64/dev/ebusreg.h>
+#include <sparc64/dev/ebusvar.h>
+
+/*
+ * Register access is indirect, through an address and data port.
+ */
+
+#define	PMC_ADDR	0
+#define	PMC_DATA	1
+
+/* Watchdog time-out register. */
+#define PMC_WDTO	0x05
+
+struct pmc_softc {
+	struct device		sc_dv;
+	bus_space_tag_t		sc_iot;
+	bus_space_handle_t	sc_ioh;
+};
+
+int	pmc_match(struct device *, void *, void *);
+void	pmc_attach(struct device *, struct device *, void *);
+int	pmc_wdog_cb(void *, int);
+
+struct cfattach pmc_ca = {
+	sizeof(struct pmc_softc), pmc_match, pmc_attach
+};
+
+struct cfdriver pmc_cd = {
+	NULL, "pmc", DV_DULL
+};
+
+int
+pmc_match(struct device *parent, void *cf, void *aux)
+{
+	struct ebus_attach_args *ea = aux;
+
+	if (strcmp("pmc", ea->ea_name) == 0)
+		return (1);
+	return (0);
+}
+
+void
+pmc_attach(struct device *parent, struct device *self, void *aux)
+{
+	struct pmc_softc *sc = (void *)self;
+	struct ebus_attach_args *ea = aux;
+
+	/* Use prom address if available, otherwise map it. */
+	if (ea->ea_nvaddrs) {
+		if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
+		    BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) {
+			printf(": can't map PROM register space\n");
+			return;
+		}
+		sc->sc_iot = ea->ea_memtag;
+	} else if (ebus_bus_map(ea->ea_iotag, 0,
+	    EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
+	    ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
+		sc->sc_iot = ea->ea_iotag;
+	} else if (ebus_bus_map(ea->ea_memtag, 0,
+	    EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
+	    ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
+		sc->sc_iot = ea->ea_memtag;
+	} else {
+		printf("%s: can't map register space\n", self->dv_xname);
+		return;
+	}
+
+	printf("\n");
+
+	wdog_register(sc, pmc_wdog_cb);
+}
+
+int
+pmc_wdog_cb(void *arg, int period)
+{
+	struct pmc_softc *sc = arg;
+	int mins;
+
+	mins = (period + 59) / 60;
+	if (mins > 255)
+		mins = 255;
+
+	bus_space_write_1(sc->sc_iot, sc->sc_ioh, PMC_ADDR, PMC_WDTO);
+	bus_space_write_1(sc->sc_iot, sc->sc_ioh, PMC_DATA, mins);
+
+	return (mins * 60);
+}