i82072.c revision 1.8 
1/*	$NetBSD: i82072.c,v 1.8 2003/07/15 02:43:43 lukem 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 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *        This product includes software developed by the NetBSD
20 *        Foundation, Inc. and its contributors.
21 * 4. Neither the name of The NetBSD Foundation nor the names of its
22 *    contributors may be used to endorse or promote products derived
23 *    from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: i82072.c,v 1.8 2003/07/15 02:43:43 lukem Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/mbuf.h>
44#include <sys/syslog.h>
45#include <sys/socket.h>
46#include <sys/device.h>
47#include <sys/conf.h>
48#include <sys/event.h>
49
50#include <machine/cpu.h>
51#include <machine/autoconf.h>
52#include <machine/mainboard.h>
53#include <machine/bus.h>
54
55dev_type_open(fdopen);
56dev_type_strategy(fdstrategy);
57
58const struct bdevsw fd_bdevsw = {
59	fdopen, nullclose, fdstrategy, noioctl, nodump, nosize, D_DISK
60};
61
62const struct cdevsw fd_cdevsw = {
63	fdopen, nullclose, noread, nowrite, noioctl,
64	nostop, notty, nopoll, nommap, nokqfilter, D_DISK
65};
66
67#define	I82072_STATUS	0x000003
68#define	I82072_DATA	0x000007
69#define	I82072_TC	0x800003
70
71struct	fd_softc {
72        struct  device dev;
73        struct  evcnt  fd_intrcnt;
74	bus_space_tag_t	fd_bst;
75	bus_space_handle_t fd_bsh;
76        int     unit;
77};
78
79static int	fd_match (struct device *, struct cfdata *, void *);
80static void	fd_attach (struct device *, struct device *, void *);
81static void     fd_reset (struct fd_softc *);
82
83CFATTACH_DECL(fd, sizeof(struct fd_softc),
84    fd_match, fd_attach, NULL, NULL);
85
86static int	fd_intr (void *);
87
88int
89fd_match(struct device *parent, struct cfdata *cf, void *aux)
90{
91	return 1;
92}
93
94void
95fd_attach(struct device *parent, struct device *self, void *aux)
96{
97        struct fd_softc *sc = (void *)self;
98	struct confargs *ca = aux;
99
100	sc->fd_bst = ca->ca_bustag;
101	if (bus_space_map(ca->ca_bustag, ca->ca_addr,
102			  0x1000000,
103			  BUS_SPACE_MAP_LINEAR,
104			  &sc->fd_bsh) != 0) {
105		printf("%s: cannot map registers\n", self->dv_xname);
106		return;
107	}
108	evcnt_attach_dynamic(&sc->fd_intrcnt, EVCNT_TYPE_INTR, NULL,
109			     self->dv_xname, "intr");
110
111	bus_intr_establish(sc->fd_bst, SYS_INTR_FDC, 0, 0, fd_intr, sc);
112
113	fd_reset(sc);
114	printf(": not fully implemented\n");
115}
116
117void
118fd_reset(struct fd_softc *sc)
119{
120	/* This clears any pending interrupts from the i82072 FDC */
121	bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_STATUS, 0x80);
122	DELAY(1000);
123	bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_TC, 0x01);
124	DELAY(1000);
125}
126
127int
128fdopen(dev_t dev, int flags, int mode, struct proc *p)
129{
130	return (EBADF);
131}
132
133void
134fdstrategy(struct buf *bp)
135{
136	panic("fdstrategy");
137}
138
139static int
140fd_intr(arg)
141	void *arg;
142{
143	struct fd_softc *sc = arg;
144
145	sc->fd_intrcnt.ev_count++;
146	fd_reset(sc);
147	return 0;
148}
149