summaryrefslogtreecommitdiff
path: root/sys/dev/hpc/button.c
blob: 88e60407edbc2b091dbf9eeca449510be6f8e3bb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
/*	$NetBSD: button.c,v 1.16 2012/10/27 17:18:17 chs Exp $	*/

/*-
 * Copyright (c) 1999-2001
 *         TAKEMURA Shin1 and PocketBSD Project. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the PocketBSD project
 *	and its contributors.
 * 4. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: button.c,v 1.16 2012/10/27 17:18:17 chs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/bus.h>

#include <machine/config_hook.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <dev/hpc/hpciovar.h>

#include "locators.h"

struct button_softc {
	hpcio_chip_t sc_hc;
	hpcio_intr_handle_t sc_intr_handle;
	int sc_port;
	long sc_id;
	int sc_active;
	config_hook_tag sc_hook_tag;
	config_hook_tag sc_ghook_tag;
};

static int	button_match(device_t, cfdata_t, void *);
static void	button_attach(device_t, device_t, void *);
static int	button_intr(void *);
static int	button_state(void *, int, long, void *);

CFATTACH_DECL_NEW(button, sizeof(struct button_softc),
    button_match, button_attach, NULL, NULL);

int
button_match(device_t parent, cfdata_t match, void *aux)
{
	struct hpcio_attach_args *haa = aux;
	platid_mask_t mask;

	if (strcmp(haa->haa_busname, HPCIO_BUSNAME))
		return (0);
	if (match->cf_loc[HPCIOIFCF_PLATFORM] == 0)
		return (0);
	mask = PLATID_DEREF(match->cf_loc[HPCIOIFCF_PLATFORM]);
	return (platid_match(&platid, &mask));
}

void
button_attach(device_t parent, device_t self, void *aux)
{
	struct hpcio_attach_args *haa = aux;
	int *loc;
	struct button_softc *sc = device_private(self);
	int mode;

	loc = device_cfdata(self)->cf_loc;
	sc->sc_hc = (*haa->haa_getchip)(haa->haa_sc, loc[HPCIOIFCF_IOCHIP]);
	sc->sc_port = loc[HPCIOIFCF_PORT];
	sc->sc_id = loc[HPCIOIFCF_ID];
	sc->sc_active = loc[HPCIOIFCF_ACTIVE];
	printf(" port=%d id=%ld active=%s",
	    sc->sc_port, sc->sc_id, sc->sc_active ? "high" : "low");

	mode = HPCIO_INTR_HOLD;
	if (loc[HPCIOIFCF_LEVEL] != HPCIOIFCF_LEVEL_DEFAULT) {
		mode |= HPCIO_INTR_LEVEL;
		if (loc[HPCIOIFCF_LEVEL] == 0)
			mode |= HPCIO_INTR_LOW;
		else
			mode |= HPCIO_INTR_HIGH;
		printf(" sense=level");
	} else {
		mode |= HPCIO_INTR_EDGE;
		switch (loc[HPCIOIFCF_EDGE]) {
		case 1:
			mode |= HPCIO_INTR_POSEDGE;
			break;
		case 2:
			mode |= HPCIO_INTR_NEGEDGE;
			break;
		case 0:
		case 3:
		case HPCIOMANCF_EDGE_DEFAULT:
			mode |= HPCIO_INTR_POSEDGE;
			mode |= HPCIO_INTR_NEGEDGE;
			break;
		default:
			printf("%s(%d): invalid configuration, edge=%d",
			    __FILE__, __LINE__, loc[HPCIOIFCF_EDGE]);
			break;
		}
		printf(" sense=edge");
	}

	if (sc->sc_port == HPCIOIFCF_PORT_DEFAULT ||
	    sc->sc_id == HPCIOIFCF_ID_DEFAULT)
		printf(" (ignored)");
	else
		sc->sc_intr_handle =
		    hpcio_intr_establish(sc->sc_hc, sc->sc_port,
			mode, button_intr, sc);
	sc->sc_ghook_tag = config_hook(CONFIG_HOOK_GET, sc->sc_id,
	    CONFIG_HOOK_SHARE, button_state, sc);
	printf("\n");
}

int
button_state(void *ctx, int type, long id, void *msg)
{
	struct button_softc *sc = ctx;

	if (type != CONFIG_HOOK_GET || id != sc->sc_id)
		return (1);

	if (CONFIG_HOOK_VALUEP(msg))
		return (1);

	*(int*)msg = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);
	return (0);
}

int
button_intr(void *ctx)
{
	struct button_softc *sc = ctx;
	int on;

	on = (hpcio_portread(sc->sc_hc, sc->sc_port) == sc->sc_active);

	/* Clear interrupt */
	hpcio_intr_clear(sc->sc_hc, sc->sc_intr_handle);

	config_hook_call(CONFIG_HOOK_BUTTONEVENT, sc->sc_id, (void*)on);

	return (0);
}