/* $OpenBSD: pmc.c,v 1.5 2021/10/24 17:05:04 mpi 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 #include #include #include #include #include #include #include #include /* * 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_activate(struct device *, int); int pmc_wdog_cb(void *, int); const struct cfattach pmc_ca = { sizeof(struct pmc_softc), pmc_match, pmc_attach, NULL, pmc_activate }; 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(": can't map register space\n"); return; } printf("\n"); wdog_register(pmc_wdog_cb, sc); } int pmc_activate(struct device *self, int act) { switch (act) { case DVACT_POWERDOWN: wdog_shutdown(self); break; } return (0); } 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); }