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
48dev_type_open(fdopen);
49dev_type_strategy(fdstrategy);
50
51const struct bdevsw fd_bdevsw = {
52	fdopen, nullclose, fdstrategy, noioctl, nodump, nosize, D_DISK
53};
54
55const 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
64struct	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
72static int	fd_match (struct device *, struct cfdata *, void *);
73static void	fd_attach (struct device *, struct device *, void *);
74static void     fd_reset (struct fd_softc *);
75
76CFATTACH_DECL(fd, sizeof(struct fd_softc),
77    fd_match, fd_attach, NULL, NULL);
78
79static int	fd_intr (void *);
80
81int
82fd_match(struct device *parent, struct cfdata *cf, void *aux)
83{
84	return 1;
85}
86
87void
88fd_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
110void
111fd_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
120int
121fdopen(dev_t dev, int flags, int mode, struct lwp *l)
122{
123	return (EBADF);
124}
125
126void
127fdstrategy(struct buf *bp)
128{
129	panic("fdstrategy");
130}
131
132static int
133fd_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}
141