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Annotation of sys/arch/mvme68k/dev/fooip.c, Revision 1.1.1.1

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: }