1 /* $NetBSD: btn_obio.c,v 1.7 2021/07/15 05:07:50 rin 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 1.7 2021/07/15 05:07:50 rin 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
59 struct 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
74 static int btn_obio_probe(device_t, cfdata_t, void *);
75 static void btn_obio_attach(device_t, device_t, void *);
76
77 static int btn_intr(void *aux);
78 static void btn_sysmon_pressed_event(void *arg);
79 static void btn_pressed_event(void *arg);
80 static void btn_guard_timeout(void *arg);
81
82 static struct btn_obio_softc *btn_softc;
83
84 static 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
94 CFATTACH_DECL_NEW(btn_obio, sizeof(struct btn_obio_softc),
95 btn_obio_probe, btn_obio_attach, NULL, NULL);
96
97 static int
btn_obio_probe(device_t parent,cfdata_t cfp,void * aux)98 btn_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
113 static void
btn_obio_attach(device_t parent,device_t self,void * aux)114 btn_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 btn_init();
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
158 static int
btn_intr(void * arg)159 btn_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
213 static void
btn_sysmon_pressed_event(void * arg)214 btn_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
221 static void
btn_pressed_event(void * arg)222 btn_pressed_event(void *arg)
223 {
224 struct btn_event *bev = (void *)arg;
225
226 btn_event_send(bev, BUTTON_EVENT_PRESSED);
227 }
228
229 static void
btn_guard_timeout(void * arg)230 btn_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