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Annotation of sys/arch/mvme68k/dev/fooip.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: fooip.c,v 1.9 2004/07/30 22:29:44 miod Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1995 Theo de Raadt
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  *
        !            16:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            17:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            18:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            19:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            20:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            21:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            22:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            23:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            24:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            25:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            26:  */
        !            27:
        !            28: /*
        !            29:  * A sample framework for writing an IP module driver.
        !            30:  */
        !            31: #include <sys/param.h>
        !            32: #include <sys/conf.h>
        !            33: #include <sys/ioctl.h>
        !            34: #include <sys/proc.h>
        !            35: #include <sys/user.h>
        !            36: #include <sys/tty.h>
        !            37: #include <sys/uio.h>
        !            38: #include <sys/systm.h>
        !            39: #include <sys/kernel.h>
        !            40: #include <sys/syslog.h>
        !            41: #include <sys/fcntl.h>
        !            42: #include <sys/device.h>
        !            43: #include <machine/autoconf.h>
        !            44: #include <machine/cpu.h>
        !            45: #include <mvme68k/dev/ipicreg.h>
        !            46:
        !            47: struct fooipregs {
        !            48:        volatile u_char         fooip_reg1;
        !            49:        volatile u_char         fooip_vec;
        !            50: };
        !            51:
        !            52: struct fooipsoftc {
        !            53:        struct device           sc_dev;
        !            54:        struct ipicsoftc        *sc_ipicsc;
        !            55:        struct intrhand         sc_ih;
        !            56:
        !            57:        int                     sc_slot;
        !            58:        struct fooipregs        *sc_regs;
        !            59: };
        !            60:
        !            61: void fooipattach(struct device *, struct device *, void *);
        !            62: int  fooipmatch(struct device *, void *, void *);
        !            63:
        !            64: struct cfattach fooip_ca = {
        !            65:        sizeof(struct fooipsoftc), fooipmatch, fooipattach
        !            66: };
        !            67:
        !            68: struct cfdriver fooip_cd = {
        !            69:        NULL, "fooip", DV_DULL
        !            70: };
        !            71:
        !            72: int  fooipintr(void *);
        !            73:
        !            74: int
        !            75: fooipmatch(parent, cf, args)
        !            76:        struct device *parent;
        !            77:        void *cf;
        !            78:        void *args;
        !            79: {
        !            80:        return (1);
        !            81: }
        !            82:
        !            83: void
        !            84: fooipattach(parent, self, args)
        !            85:        struct device *parent, *self;
        !            86:        void *args;
        !            87: {
        !            88:        struct fooipsoftc *sc = (struct fooipsoftc *)self;
        !            89:        struct confargs *ca = args;
        !            90:
        !            91:        sc->sc_ipicsc = (struct ipicsoftc *)parent;
        !            92:        sc->sc_regs = (struct fooipregs *)(ca->ca_vaddr +
        !            93:            IPIC_IP_REGOFFSET);
        !            94:        sc->sc_slot = ca->ca_offset;
        !            95:
        !            96:        /* this device uses only one interrupt */
        !            97:        sc->sc_ih.ih_fn = fooipintr;
        !            98:        sc->sc_ih.ih_arg = sc;
        !            99:        sc->sc_ih.ih_ipl = ca->ca_ipl;
        !           100:        ipicintr_establish(ca->ca_vec, &sc->sc_ih, self->dv_xname);
        !           101:
        !           102:        sc->sc_regs->fooip_vec = ca->ca_vec;
        !           103:        sc->sc_ipicsc->sc_ipic->ipic_irq[sc->sc_slot][0] = ca->ca_ipl |
        !           104:            IPIC_IRQ_ICLR | IPIC_IRQ_IEN;
        !           105:
        !           106:        printf("\n");
        !           107: }
        !           108:
        !           109: int
        !           110: fooipintr(arg)
        !           111:        void *arg;
        !           112: {
        !           113:        struct fooipsoftc *sc = arg;
        !           114:
        !           115:        if (sc->sc_ipicsc->sc_ipic->ipic_irq[sc->sc_slot][0] & IPIC_IRQ_INT) {
        !           116:                /* clear interrupt on device */
        !           117:                return (1);
        !           118:        }
        !           119:        return (0);
        !           120: }