Return to pmc.c CVS log

Up to [local] / sys / arch / sparc64 / dev

Annotation of sys/arch/sparc64/dev/pmc.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: pmc.c,v 1.1 2007/04/10 19:03:10 kettenis Exp $        */
                      2:
                      3: /*
                      4:  * Copyright (c) 2007 Mark Kettenis
                      5:  *
                      6:  * Permission to use, copy, modify, and distribute this software for any
                      7:  * purpose with or without fee is hereby granted, provided that the above
                      8:  * copyright notice and this permission notice appear in all copies.
                      9:  *
                     10:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     11:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     12:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     13:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     14:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     15:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     16:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     17:  */
                     18:
                     19: /*
                     20:  * Driver for watchdog device on Blade 1000, Fire 280R, Fire V480 etc.
                     21:  */
                     22:
                     23: #include <sys/param.h>
                     24: #include <sys/kernel.h>
                     25: #include <sys/device.h>
                     26: #include <sys/malloc.h>
                     27: #include <sys/systm.h>
                     28:
                     29: #include <machine/bus.h>
                     30: #include <machine/autoconf.h>
                     31:
                     32: #include <sparc64/dev/ebusreg.h>
                     33: #include <sparc64/dev/ebusvar.h>
                     34:
                     35: /*
                     36:  * Register access is indirect, through an address and data port.
                     37:  */
                     38:
                     39: #define        PMC_ADDR        0
                     40: #define        PMC_DATA        1
                     41:
                     42: /* Watchdog time-out register. */
                     43: #define PMC_WDTO       0x05
                     44:
                     45: struct pmc_softc {
                     46:        struct device           sc_dv;
                     47:        bus_space_tag_t         sc_iot;
                     48:        bus_space_handle_t      sc_ioh;
                     49: };
                     50:
                     51: int    pmc_match(struct device *, void *, void *);
                     52: void   pmc_attach(struct device *, struct device *, void *);
                     53: int    pmc_wdog_cb(void *, int);
                     54:
                     55: struct cfattach pmc_ca = {
                     56:        sizeof(struct pmc_softc), pmc_match, pmc_attach
                     57: };
                     58:
                     59: struct cfdriver pmc_cd = {
                     60:        NULL, "pmc", DV_DULL
                     61: };
                     62:
                     63: int
                     64: pmc_match(struct device *parent, void *cf, void *aux)
                     65: {
                     66:        struct ebus_attach_args *ea = aux;
                     67:
                     68:        if (strcmp("pmc", ea->ea_name) == 0)
                     69:                return (1);
                     70:        return (0);
                     71: }
                     72:
                     73: void
                     74: pmc_attach(struct device *parent, struct device *self, void *aux)
                     75: {
                     76:        struct pmc_softc *sc = (void *)self;
                     77:        struct ebus_attach_args *ea = aux;
                     78:
                     79:        /* Use prom address if available, otherwise map it. */
                     80:        if (ea->ea_nvaddrs) {
                     81:                if (bus_space_map(ea->ea_memtag, ea->ea_vaddrs[0], 0,
                     82:                    BUS_SPACE_MAP_PROMADDRESS, &sc->sc_ioh)) {
                     83:                        printf(": can't map PROM register space\n");
                     84:                        return;
                     85:                }
                     86:                sc->sc_iot = ea->ea_memtag;
                     87:        } else if (ebus_bus_map(ea->ea_iotag, 0,
                     88:            EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
                     89:            ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
                     90:                sc->sc_iot = ea->ea_iotag;
                     91:        } else if (ebus_bus_map(ea->ea_memtag, 0,
                     92:            EBUS_PADDR_FROM_REG(&ea->ea_regs[0]),
                     93:            ea->ea_regs[0].size, 0, 0, &sc->sc_ioh) == 0) {
                     94:                sc->sc_iot = ea->ea_memtag;
                     95:        } else {
                     96:                printf("%s: can't map register space\n", self->dv_xname);
                     97:                return;
                     98:        }
                     99:
                    100:        printf("\n");
                    101:
                    102:        wdog_register(sc, pmc_wdog_cb);
                    103: }
                    104:
                    105: int
                    106: pmc_wdog_cb(void *arg, int period)
                    107: {
                    108:        struct pmc_softc *sc = arg;
                    109:        int mins;
                    110:
                    111:        mins = (period + 59) / 60;
                    112:        if (mins > 255)
                    113:                mins = 255;
                    114:
                    115:        bus_space_write_1(sc->sc_iot, sc->sc_ioh, PMC_ADDR, PMC_WDTO);
                    116:        bus_space_write_1(sc->sc_iot, sc->sc_ioh, PMC_DATA, mins);
                    117:
                    118:        return (mins * 60);
                    119: }