diff options
Diffstat (limited to 'sys/arch/sparc64/dev/pmc.c')
| -rw-r--r-- | sys/arch/sparc64/dev/pmc.c | 119 |
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); +} |