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Annotation of sys/arch/sparc/dev/power.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: power.c,v 1.10 2007/07/01 19:07:45 miod Exp $ */
        !             2: /*     $NetBSD: power.c,v 1.2 1996/05/16 15:56:56 abrown Exp $ */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1996
        !             6:  *     The President and Fellows of Harvard College. All rights reserved.
        !             7:  *
        !             8:  * All advertising materials mentioning features or use of this software
        !             9:  * must display the following acknowledgement:
        !            10:  *     This product includes software developed by Aaron Brown and
        !            11:  *     Harvard University.
        !            12:  *
        !            13:  * Redistribution and use in source and binary forms, with or without
        !            14:  * modification, are permitted provided that the following conditions
        !            15:  * are met:
        !            16:  *
        !            17:  * 1. Redistributions of source code must retain the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer.
        !            19:  * 2. Redistributions in binary form must reproduce the above copyright
        !            20:  *    notice, this list of conditions and the following disclaimer in the
        !            21:  *    documentation and/or other materials provided with the distribution.
        !            22:  * 3. All advertising materials mentioning features or use of this software
        !            23:  *    must display the following acknowledgement:
        !            24:  *     This product includes software developed by Harvard University
        !            25:  *     and its contributors.
        !            26:  * 4. Neither the name of the University nor the names of its contributors
        !            27:  *    may be used to endorse or promote products derived from this software
        !            28:  *    without specific prior written permission.
        !            29:  *
        !            30:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            31:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            32:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            33:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            34:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            35:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            36:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            37:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            38:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            39:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            40:  * SUCH DAMAGE.
        !            41:  *
        !            42:  */
        !            43:
        !            44: #include <sys/param.h>
        !            45: #include <sys/device.h>
        !            46: #include <sys/kernel.h>
        !            47: #include <sys/systm.h>
        !            48:
        !            49: #include <machine/autoconf.h>
        !            50:
        !            51: #include <sparc/dev/power.h>
        !            52:
        !            53: void   powerattach(struct device *, struct device *, void *);
        !            54: int    powermatch(struct device *, void *, void *);
        !            55:
        !            56: struct cfattach power_ca = {
        !            57:        sizeof(struct device), powermatch, powerattach
        !            58: };
        !            59:
        !            60: struct cfdriver power_cd = {
        !            61:        NULL, "power", DV_DULL
        !            62: };
        !            63:
        !            64: static char power_attached = 0;
        !            65: volatile u_char *power_reg;
        !            66:
        !            67: /*
        !            68:  * This is the driver for the "power" register available on some Sun4m
        !            69:  * machines. This allows the machine to remove power automatically when
        !            70:  * shutdown or halted or whatever.
        !            71:  */
        !            72:
        !            73: int
        !            74: powermatch(struct device *parent, void *vcf, void *aux)
        !            75: {
        !            76:        struct confargs *ca = aux;
        !            77:
        !            78:        if (CPU_ISSUN4M) {
        !            79:                if (strcmp("power", ca->ca_ra.ra_name) == 0)
        !            80:                        return (1);
        !            81:        }
        !            82:
        !            83:        return (0);
        !            84: }
        !            85:
        !            86: /* ARGSUSED */
        !            87: void
        !            88: powerattach(struct device *parent, struct device *self, void *aux)
        !            89: {
        !            90:        struct confargs *ca = aux;
        !            91:        struct romaux *ra = &ca->ca_ra;
        !            92:
        !            93:        power_reg = mapiodev(ra->ra_reg, 0, sizeof(long));
        !            94:
        !            95:        power_attached = 1;
        !            96:
        !            97:        printf("\n");
        !            98: }
        !            99:
        !           100: void
        !           101: auxio_powerdown()
        !           102: {
        !           103:        if (power_attached) {
        !           104:                *POWER_REG |= POWER_OFF;
        !           105:                DELAY(1000000);
        !           106:        }
        !           107: }