btn_obio.c revision 1.4 
1/*	$NetBSD: btn_obio.c,v 1.4 2008/03/27 02:40:14 uwe 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 1.4 2008/03/27 02:40:14 uwe 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	device_t		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(device_t, cfdata_t, void *);
76static void btn_obio_attach(device_t, device_t, 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_NEW(btn_obio, sizeof(struct btn_obio_softc),
96    btn_obio_probe, btn_obio_attach, NULL, NULL);
97
98static int
99btn_obio_probe(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux)
116{
117	struct btn_obio_softc *sc;
118	int i;
119
120	aprint_naive("\n");
121	aprint_normal(": USL-5P Button\n");
122
123	sc = device_private(self);
124	sc->sc_dev = self;
125
126	btn_softc = sc;
127
128	callout_init(&sc->sc_guard_ch, 0);
129	callout_setfunc(&sc->sc_guard_ch, btn_guard_timeout, sc);
130
131	sc->sc_ih = extintr_establish(LANDISK_INTR_BTN, IPL_TTY, btn_intr, sc);
132	if (sc->sc_ih == NULL) {
133		aprint_error_dev(self, "unable to establish interrupt");
134		panic("extintr_establish");
135	}
136
137	sc->sc_smpsw.smpsw_name = device_xname(self);
138	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_RESET;
139	if (sysmon_pswitch_register(&sc->sc_smpsw) != 0) {
140		aprint_error_dev(self, "unable to register with sysmon\n");
141		return;
142	}
143	sc->sc_mask |= BTN_RESET_BIT;
144
145	for (i = 0; i < NBUTTON; i++) {
146		int idx = btnlist[i].idx;
147		sc->sc_bev[idx].bev_name = btnlist[i].name;
148		if (btn_event_register(&sc->sc_bev[idx]) != 0) {
149			aprint_error_dev(self,
150					 "unable to register '%s' button\n",
151					 btnlist[i].name);
152		} else {
153			sc->sc_mask |= btnlist[i].mask;
154		}
155	}
156}
157
158static int
159btn_intr(void *arg)
160{
161	struct btn_obio_softc *sc = (void *)arg;
162	device_t self = sc->sc_dev;
163	int status;
164	int i;
165
166	status = (int8_t)_reg_read_1(LANDISK_BTNSTAT);
167	if (status == -1) {
168		return (0);
169	}
170
171	status = ~status;
172	if (status & BTN_ALL_BIT) {
173		if (status & BTN_RESET_BIT) {
174			if (sc->sc_mask & BTN_RESET_BIT) {
175				extintr_disable(sc->sc_ih);
176#if NPWRSW_OBIO > 0
177				extintr_disable_by_num(LANDISK_INTR_PWRSW);
178#endif
179				sysmon_task_queue_sched(0,
180				    btn_sysmon_pressed_event, sc);
181				return (1);
182			} else {
183				aprint_normal_dev(self,
184					"reset button pressed\n");
185			}
186		}
187
188		for (i = 0; i < NBUTTON; i++) {
189			uint8_t mask = btnlist[i].mask;
190			int rv = 0;
191			if (status & mask) {
192				if (sc->sc_mask & mask) {
193					sysmon_task_queue_sched(1,
194					    btn_pressed_event,
195					    &sc->sc_bev[btnlist[i].idx]);
196				} else {
197					aprint_normal_dev(self,
198						"%s button pressed\n",
199						btnlist[i].name);
200				}
201				rv = 1;
202			}
203			if (rv != 0) {
204				extintr_disable(sc->sc_ih);
205				callout_schedule(&sc->sc_guard_ch, BTN_TIMEOUT);
206			}
207		}
208		return (1);
209	}
210	return (0);
211}
212
213static void
214btn_sysmon_pressed_event(void *arg)
215{
216	struct btn_obio_softc *sc = (void *)arg;
217
218	sysmon_pswitch_event(&sc->sc_smpsw, PSWITCH_EVENT_PRESSED);
219}
220
221static void
222btn_pressed_event(void *arg)
223{
224	struct btn_event *bev = (void *)arg;
225
226	btn_event_send(bev, BUTTON_EVENT_PRESSED);
227}
228
229static void
230btn_guard_timeout(void *arg)
231{
232	struct btn_obio_softc *sc = arg;
233
234	callout_stop(&sc->sc_guard_ch);
235	extintr_enable(sc->sc_ih);
236}
237