1/*	$NetBSD: i82072.c,v 1.14 2014/07/25 08:02:18 dholland 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 1.14 2014/07/25 08:02:18 dholland 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	.d_open = fdopen,
53	.d_close = nullclose,
54	.d_strategy = fdstrategy,
55	.d_ioctl = noioctl,
56	.d_dump = nodump,
57	.d_psize = nosize,
58	.d_discard = nodiscard,
59	.d_flag = D_DISK
60};
61
62const struct cdevsw fd_cdevsw = {
63	.d_open = fdopen,
64	.d_close = nullclose,
65	.d_read = noread,
66	.d_write = nowrite,
67	.d_ioctl = noioctl,
68	.d_stop = nostop,
69	.d_tty = notty,
70	.d_poll = nopoll,
71	.d_mmap = nommap,
72	.d_kqfilter = nokqfilter,
73	.d_discard = nodiscard,
74	.d_flag = D_DISK
75};
76
77#define	I82072_STATUS	0x000003
78#define	I82072_DATA	0x000007
79#define	I82072_TC	0x800003
80
81struct	fd_softc {
82        device_t dev;
83        struct  evcnt  fd_intrcnt;
84	bus_space_tag_t	fd_bst;
85	bus_space_handle_t fd_bsh;
86        int     unit;
87};
88
89static int	fd_match (device_t, cfdata_t, void *);
90static void	fd_attach (device_t, device_t, void *);
91static void     fd_reset (struct fd_softc *);
92
93CFATTACH_DECL_NEW(fd, sizeof(struct fd_softc),
94    fd_match, fd_attach, NULL, NULL);
95
96static int	fd_intr (void *);
97
98int
99fd_match(device_t parent, cfdata_t cf, void *aux)
100{
101	return 1;
102}
103
104void
105fd_attach(device_t parent, device_t self, void *aux)
106{
107        struct fd_softc *sc = device_private(self);
108	struct confargs *ca = aux;
109
110	sc->fd_bst = ca->ca_bustag;
111	if (bus_space_map(ca->ca_bustag, ca->ca_addr,
112			  0x1000000,
113			  BUS_SPACE_MAP_LINEAR,
114			  &sc->fd_bsh) != 0) {
115		printf("%s: cannot map registers\n", device_xname(self));
116		return;
117	}
118	evcnt_attach_dynamic(&sc->fd_intrcnt, EVCNT_TYPE_INTR, NULL,
119			     device_xname(self), "intr");
120
121	bus_intr_establish(sc->fd_bst, SYS_INTR_FDC, 0, 0, fd_intr, sc);
122
123	fd_reset(sc);
124	printf(": not fully implemented\n");
125}
126
127void
128fd_reset(struct fd_softc *sc)
129{
130	/* This clears any pending interrupts from the i82072 FDC */
131	bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_STATUS, 0x80);
132	DELAY(1000);
133	bus_space_write_1(sc->fd_bst, sc->fd_bsh, I82072_TC, 0x01);
134	DELAY(1000);
135}
136
137int
138fdopen(dev_t dev, int flags, int mode, struct lwp *l)
139{
140	return (EBADF);
141}
142
143void
144fdstrategy(struct buf *bp)
145{
146	panic("fdstrategy");
147}
148
149static int
150fd_intr(void *arg)
151{
152	struct fd_softc *sc = arg;
153
154	sc->fd_intrcnt.ev_count++;
155	fd_reset(sc);
156	return 0;
157}
158