btn_obio.c revision 1.2 
1/*	$NetBSD: btn_obio.c,v 1.2 2007/07/09 20:52:19 ad Exp $	*/
2
3/*-
4 * Copyright (c) 2005 NONAKA Kimihiro
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include "pwrsw_obio.h"
30
31#include <sys/cdefs.h>
32__KERNEL_RCSID(0, "$NetBSD: btn_obio.c,v 1.2 2007/07/09 20:52:19 ad Exp $");
33
34#include <sys/types.h>
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/device.h>
38#include <sys/malloc.h>
39#include <sys/kernel.h>
40#include <sys/conf.h>
41#include <sys/ioctl.h>
42#include <sys/callout.h>
43
44#include <dev/sysmon/sysmonvar.h>
45#include <dev/sysmon/sysmon_taskq.h>
46
47#include <sh3/devreg.h>
48
49#include <machine/button.h>
50
51#include <landisk/landisk/landiskreg.h>
52#include <landisk/dev/obiovar.h>
53#include <landisk/dev/buttonvar.h>
54
55#define	BTN_SELECT	0
56#define	BTN_COPY	1
57#define	BTN_REMOVE	2
58#define	NBUTTON		3
59
60struct btn_obio_softc {
61	struct device		sc_dev;
62	void			*sc_ih;
63
64	struct callout		sc_guard_ch;
65	struct sysmon_pswitch	sc_smpsw;	/* reset */
66	struct btn_event	sc_bev[NBUTTON];
67
68	int			sc_mask;
69};
70
71#ifndef	BTN_TIMEOUT
72#define	BTN_TIMEOUT	(hz / 10)	/* 100ms */
73#endif
74
75static int btn_obio_probe(struct device *, struct cfdata *, void *);
76static void btn_obio_attach(struct device *, struct device *, void *);
77
78static int btn_intr(void *aux);
79static void btn_sysmon_pressed_event(void *arg);
80static void btn_pressed_event(void *arg);
81static void btn_guard_timeout(void *arg);
82
83static struct btn_obio_softc *btn_softc;
84
85static const struct {
86	int idx;
87	int mask;
88	const char *name;
89} btnlist[NBUTTON] = {
90	{ BTN_SELECT,	BTN_SELECT_BIT, "select" },
91	{ BTN_COPY,	BTN_COPY_BIT,	"copy"   },
92	{ BTN_REMOVE,	BTN_REMOVE_BIT,	"remove" },
93};
94
95CFATTACH_DECL(btn_obio, sizeof(struct btn_obio_softc),
96    btn_obio_probe, btn_obio_attach, NULL, NULL);
97
98static int
99btn_obio_probe(struct device *parent, struct cfdata *cfp, void *aux)
100{
101	struct obio_attach_args *oa = aux;
102
103	if (btn_softc)
104		return (0);
105
106	oa->oa_nio = 0;
107	oa->oa_niomem = 0;
108	oa->oa_nirq = 1;
109	oa->oa_irq[0].or_irq = LANDISK_INTR_BTN;
110
111	return (1);
112}
113
114static void
115btn_obio_attach(struct device *parent, struct device *self, void *aux)
116{
117	struct btn_obio_softc *sc = (void *)self;
118	int i;
119
120	printf(": USL-5P Button\n");
121
122	btn_softc = sc;
123
124	callout_init(&sc->sc_guard_ch, 0);
125	callout_setfunc(&sc->sc_guard_ch, btn_guard_timeout, sc);
126
127	sc->sc_ih = extintr_establish(LANDISK_INTR_BTN, IPL_TTY, btn_intr, sc);
128	if (sc->sc_ih == NULL) {
129		printf("%s: couldn't establish intr handler",
130		    sc->sc_dev.dv_xname);
131		panic("extintr_establish");
132	}
133
134	sc->sc_smpsw.smpsw_name = sc->sc_dev.dv_xname;
135	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_RESET;
136	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
137		printf("%s: unable to register with sysmon\n",
138		    sc->sc_dev.dv_xname);
139		return;
140	}
141	sc->sc_mask |= BTN_RESET_BIT;
142
143	for (i = 0; i < NBUTTON; i++) {
144		int idx = btnlist[i].idx;
145		sc->sc_bev[idx].bev_name = btnlist[i].name;
146		if (btn_event_register(&sc->sc_bev[idx]) != 0) {
147			printf("%s: unable to register '%s' button\n",
148			    sc->sc_dev.dv_xname, btnlist[i].name);
149		} else {
150			sc->sc_mask |= btnlist[i].mask;
151		}
152	}
153}
154
155static int
156btn_intr(void *arg)
157{
158	struct btn_obio_softc *sc = (void *)arg;
159	int status;
160	int i;
161
162	status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
163	if (status == -1) {
164		return (0);
165	}
166
167	status = ~status;
168	if (status & BTN_ALL_BIT) {
169		if (status & BTN_RESET_BIT) {
170			if (sc->sc_mask & BTN_RESET_BIT) {
171				extintr_disable(sc->sc_ih);
172#if NPWRSW_OBIO > 0
173				extintr_disable_by_num(LANDISK_INTR_PWRSW);
174#endif
175				sysmon_task_queue_sched(0,
176				    btn_sysmon_pressed_event, sc);
177				return (1);
178			} else {
179				printf("%s: reset button pressed\n",
180				    sc->sc_dev.dv_xname);
181			}
182		}
183
184		for (i = 0; i < NBUTTON; i++) {
185			uint8_t mask = btnlist[i].mask;
186			int rv = 0;
187			if (status & mask) {
188				if (sc->sc_mask & mask) {
189					sysmon_task_queue_sched(1,
190					    btn_pressed_event,
191					    &sc->sc_bev[btnlist[i].idx]);
192				} else {
193					printf("%s: %s button pressed\n",
194					    sc->sc_dev.dv_xname,
195					    btnlist[i].name);
196				}
197				rv = 1;
198			}
199			if (rv != 0) {
200				extintr_disable(sc->sc_ih);
201				callout_schedule(&sc->sc_guard_ch, BTN_TIMEOUT);
202			}
203		}
204		return (1);
205	}
206	return (0);
207}
208
209static void
210btn_sysmon_pressed_event(void *arg)
211{
212	struct btn_obio_softc *sc = (void *)arg;
213
214	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
215}
216
217static void
218btn_pressed_event(void *arg)
219{
220	struct btn_event *bev = (void *)arg;
221
222	btn_event_send(bev, BUTTON_EVENT_PRESSED);
223}
224
225static void
226btn_guard_timeout(void *arg)
227{
228	struct btn_obio_softc *sc = arg;
229
230	callout_stop(&sc->sc_guard_ch);
231	extintr_enable(sc->sc_ih);
232}
233