sys/arch/mipsco/obio/i82072.c

   1 /*      $NetBSD: i82072.c,v 1.10 2008/04/28 20:23:28 martin Exp $       */
   2 /*-
   3  * Copyright (c) 2000 The NetBSD Foundation, Inc.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to The NetBSD Foundation
   7  * by Wayne Knowles
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28  * POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 #include <sys/cdefs.h>
  32 __KERNEL_RCSID(0, "$NetBSD: i82072.c,v 1.10 2008/04/28 20:23:28 martin Exp $");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/mbuf.h>
  37 #include <sys/syslog.h>
  38 #include <sys/socket.h>
  39 #include <sys/device.h>
  40 #include <sys/conf.h>
  41 #include <sys/event.h>
  42
  43 #include <machine/cpu.h>
  44 #include <machine/autoconf.h>
  45 #include <machine/mainboard.h>
  46 #include <machine/bus.h>
  47
  48 dev_type_open(fdopen);
  49 dev_type_strategy(fdstrategy);
  50
  51 const struct bdevsw fd_bdevsw = {
  52         fdopen, nullclose, fdstrategy, noioctl, nodump, nosize, D_DISK
  53 };
  54
  55 const struct cdevsw fd_cdevsw = {
  56         fdopen, nullclose, noread, nowrite, noioctl,
  57         nostop, notty, nopoll, nommap, nokqfilter, D_DISK
  58 };
  59
  60 #define I82072_STATUS   0x000003
  61 #define I82072_DATA     0x000007
  62 #define I82072_TC       0x800003
  63
  64 struct  fd_softc {
  65         struct  device dev;
  66         struct  evcnt  fd_intrcnt;
  67         bus_space_tag_t fd_bst;
  68         bus_space_handle_t fd_bsh;
  69         int     unit;
  70 };
  71
  72 static int      fd_match (struct device *, struct cfdata *, void *);
  73 static void     fd_attach (struct device *, struct device *, void *);
  74 static void     fd_reset (struct fd_softc *);
  75
  76 CFATTACH_DECL(fd, sizeof(struct fd_softc),
  77     fd_match, fd_attach, NULL, NULL);
  78
  79 static int      fd_intr (void *);
  80
  81 int
  82 fd_match(struct device *parent, struct cfdata *cf, void *aux)
  83 {
  84         return 1;
  85 }
  86
  87 void
  88 fd_attach(struct device *parent, struct device *self, void *aux)
  89 {
  90         struct fd_softc *sc = (void *)self;
  91         struct confargs *ca = aux;
  92
  93         sc->fd_bst = ca->ca_bustag;
  94         if (bus_space_map(ca->ca_bustag, ca->ca_addr,
  95                           0x1000000,
  96                           BUS_SPACE_MAP_LINEAR,
  97                           &sc->fd_bsh) != 0) {
  98                 printf("%s: cannot map registers\n", self->dv_xname);
  99                 return;
 100         }
 101         evcnt_attach_dynamic(&sc->fd_intrcnt, EVCNT_TYPE_INTR, NULL,
 102                              self->dv_xname, "intr");
 103
 104         bus_intr_establish(sc->fd_bst, SYS_INTR_FDC, 0, 0, fd_intr, sc);
 105
 106         fd_reset(sc);
 107         printf(": not fully implemented\n");
 108 }
 109
 110 void
 111 fd_reset(struct fd_softc *sc)
 112 {
 113         /* This clears any pending interrupts from the i82072 FDC */
 114         bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_STATUS, 0x80);
 115         DELAY(1000);
 116         bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_TC, 0x01);
 117         DELAY(1000);
 118 }
 119
 120 int
 121 fdopen(dev_t dev, int flags, int mode, struct lwp *l)
 122 {
 123         return (EBADF);
 124 }
 125
 126 void
 127 fdstrategy(struct buf *bp)
 128 {
 129         panic("fdstrategy");
 130 }
 131
 132 static int
 133 fd_intr(void *arg)
 134 {
 135         struct fd_softc *sc = arg;
 136
 137         sc->fd_intrcnt.ev_count++;
 138         fd_reset(sc);
 139         return 0;
 140 }