btn_obio.c revision 1.6 
1/*	$NetBSD: btn_obio.c,v 1.6 2012/01/21 19:44:29 nonaka Exp $	*/
2
3/*-
4 * Copyright (C) 2005 NONAKA Kimihiro <nonaka@netbsd.org>
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include "pwrsw_obio.h"
29
30#include <sys/cdefs.h>
31__KERNEL_RCSID(0, "$NetBSD: btn_obio.c,v 1.6 2012/01/21 19:44:29 nonaka Exp $");
32
33#include <sys/types.h>
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/device.h>
37#include <sys/malloc.h>
38#include <sys/kernel.h>
39#include <sys/conf.h>
40#include <sys/ioctl.h>
41#include <sys/callout.h>
42
43#include <dev/sysmon/sysmonvar.h>
44#include <dev/sysmon/sysmon_taskq.h>
45
46#include <sh3/devreg.h>
47
48#include <machine/button.h>
49
50#include <landisk/landisk/landiskreg.h>
51#include <landisk/dev/obiovar.h>
52#include <landisk/dev/buttonvar.h>
53
54#define	BTN_SELECT	0
55#define	BTN_COPY	1
56#define	BTN_REMOVE	2
57#define	NBUTTON		3
58
59struct btn_obio_softc {
60	device_t		sc_dev;
61	void			*sc_ih;
62
63	struct callout		sc_guard_ch;
64	struct sysmon_pswitch	sc_smpsw;	/* reset */
65	struct btn_event	sc_bev[NBUTTON];
66
67	int			sc_mask;
68};
69
70#ifndef	BTN_TIMEOUT
71#define	BTN_TIMEOUT	(hz / 10)	/* 100ms */
72#endif
73
74static int btn_obio_probe(device_t, cfdata_t, void *);
75static void btn_obio_attach(device_t, device_t, void *);
76
77static int btn_intr(void *aux);
78static void btn_sysmon_pressed_event(void *arg);
79static void btn_pressed_event(void *arg);
80static void btn_guard_timeout(void *arg);
81
82static struct btn_obio_softc *btn_softc;
83
84static const struct {
85	int idx;
86	int mask;
87	const char *name;
88} btnlist[NBUTTON] = {
89	{ BTN_SELECT,	BTN_SELECT_BIT, "select" },
90	{ BTN_COPY,	BTN_COPY_BIT,	"copy"   },
91	{ BTN_REMOVE,	BTN_REMOVE_BIT,	"remove" },
92};
93
94CFATTACH_DECL_NEW(btn_obio, sizeof(struct btn_obio_softc),
95    btn_obio_probe, btn_obio_attach, NULL, NULL);
96
97static int
98btn_obio_probe(device_t parent, cfdata_t cfp, void *aux)
99{
100	struct obio_attach_args *oa = aux;
101
102	if (btn_softc)
103		return (0);
104
105	oa->oa_nio = 0;
106	oa->oa_niomem = 0;
107	oa->oa_nirq = 1;
108	oa->oa_irq[0].or_irq = LANDISK_INTR_BTN;
109
110	return (1);
111}
112
113static void
114btn_obio_attach(device_t parent, device_t self, void *aux)
115{
116	struct btn_obio_softc *sc;
117	int i;
118
119	aprint_naive("\n");
120	aprint_normal(": USL-5P buttons\n");
121
122	sc = device_private(self);
123	sc->sc_dev = self;
124
125	btn_softc = sc;
126
127	callout_init(&sc->sc_guard_ch, 0);
128	callout_setfunc(&sc->sc_guard_ch, btn_guard_timeout, sc);
129
130	sc->sc_ih = extintr_establish(LANDISK_INTR_BTN, IPL_TTY, btn_intr, sc);
131	if (sc->sc_ih == NULL) {
132		aprint_error_dev(self, "unable to establish interrupt");
133		panic("extintr_establish");
134	}
135
136	sc->sc_smpsw.smpsw_name = device_xname(self);
137	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_RESET;
138	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
139		aprint_error_dev(self, "unable to register with sysmon\n");
140		return;
141	}
142	sc->sc_mask |= BTN_RESET_BIT;
143
144	for (i = 0; i < NBUTTON; i++) {
145		int idx = btnlist[i].idx;
146		sc->sc_bev[idx].bev_name = btnlist[i].name;
147		if (btn_event_register(&sc->sc_bev[idx]) != 0) {
148			aprint_error_dev(self,
149					 "unable to register '%s' button\n",
150					 btnlist[i].name);
151		} else {
152			sc->sc_mask |= btnlist[i].mask;
153		}
154	}
155}
156
157static int
158btn_intr(void *arg)
159{
160	struct btn_obio_softc *sc = (void *)arg;
161	device_t self = sc->sc_dev;
162	int status;
163	int i;
164
165	status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
166	if (status == -1) {
167		return (0);
168	}
169
170	status = ~status;
171	if (status & BTN_ALL_BIT) {
172		if (status & BTN_RESET_BIT) {
173			if (sc->sc_mask & BTN_RESET_BIT) {
174				extintr_disable(sc->sc_ih);
175#if NPWRSW_OBIO > 0
176				extintr_disable_by_num(LANDISK_INTR_PWRSW);
177#endif
178				sysmon_task_queue_sched(0,
179				    btn_sysmon_pressed_event, sc);
180				return (1);
181			} else {
182				aprint_normal_dev(self,
183					"reset button pressed\n");
184			}
185		}
186
187		for (i = 0; i < NBUTTON; i++) {
188			uint8_t mask = btnlist[i].mask;
189			int rv = 0;
190			if (status & mask) {
191				if (sc->sc_mask & mask) {
192					sysmon_task_queue_sched(1,
193					    btn_pressed_event,
194					    &sc->sc_bev[btnlist[i].idx]);
195				} else {
196					aprint_normal_dev(self,
197						"%s button pressed\n",
198						btnlist[i].name);
199				}
200				rv = 1;
201			}
202			if (rv != 0) {
203				extintr_disable(sc->sc_ih);
204				callout_schedule(&sc->sc_guard_ch, BTN_TIMEOUT);
205			}
206		}
207		return (1);
208	}
209	return (0);
210}
211
212static void
213btn_sysmon_pressed_event(void *arg)
214{
215	struct btn_obio_softc *sc = (void *)arg;
216
217	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
218}
219
220static void
221btn_pressed_event(void *arg)
222{
223	struct btn_event *bev = (void *)arg;
224
225	btn_event_send(bev, BUTTON_EVENT_PRESSED);
226}
227
228static void
229btn_guard_timeout(void *arg)
230{
231	struct btn_obio_softc *sc = arg;
232
233	callout_stop(&sc->sc_guard_ch);
234	extintr_enable(sc->sc_ih);
235}
236