1 /* $NetBSD: btn_obio.c,v 1.5 2023/12/20 13:55:17 thorpej Exp $ */
2
3 /*-
4 * Copyright (C) 2005, 2006 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 <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: btn_obio.c,v 1.5 2023/12/20 13:55:17 thorpej Exp $");
30
31 #include <sys/types.h>
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/device.h>
35 #include <sys/kernel.h>
36 #include <sys/conf.h>
37 #include <sys/ioctl.h>
38 #include <sys/callout.h>
39
40 #include <arm/xscale/i80321var.h>
41
42 #include <sys/bus.h>
43 #include <machine/intr.h>
44
45 #include <dev/sysmon/sysmonvar.h>
46 #include <dev/sysmon/sysmon_taskq.h>
47
48 #include <evbarm/hdl_g/hdlgreg.h>
49 #include <evbarm/hdl_g/obiovar.h>
50
51 struct btn_obio_softc {
52 device_t sc_dev;
53 bus_space_tag_t sc_iot;
54 bus_space_handle_t sc_ioh;
55 void *sc_ih;
56
57 struct sysmon_pswitch sc_smpsw[2];
58
59 int sc_mask;
60 };
61
62 static int btn_obio_match(device_t, cfdata_t, void *);
63 static void btn_obio_attach(device_t, device_t, void *);
64
65 static int btn_intr(void *aux);
66 static void btn_sysmon_pressed_event(void *arg);
67
68 CFATTACH_DECL_NEW(btn_obio, sizeof(struct btn_obio_softc),
69 btn_obio_match, btn_obio_attach, NULL, NULL);
70
71 static int
btn_obio_match(device_t parent,cfdata_t cf,void * aux)72 btn_obio_match(device_t parent, cfdata_t cf, void *aux)
73 {
74
75 /* We take it on faith that the device is there. */
76 return 1;
77 }
78
79 static void
btn_obio_attach(device_t parent,device_t self,void * aux)80 btn_obio_attach(device_t parent, device_t self, void *aux)
81 {
82 struct obio_attach_args *oba = aux;
83 struct btn_obio_softc *sc = device_private(self);
84 int error;
85
86 sc->sc_dev = self;
87 sc->sc_iot = oba->oba_st;
88 error = bus_space_map(sc->sc_iot, oba->oba_addr, 1, 0, &sc->sc_ioh);
89 if (error) {
90 aprint_error(": failed to map registers: %d\n", error);
91 return;
92 }
93
94 sysmon_power_settype("landisk");
95 sysmon_task_queue_init();
96
97 /* power switch */
98 sc->sc_smpsw[0].smpsw_name = device_xname(self);
99 sc->sc_smpsw[0].smpsw_type = PSWITCH_TYPE_POWER;
100 if (sysmon_pswitch_register(&sc->sc_smpsw[0]) != 0) {
101 aprint_error(": unable to register power button with sysmon\n");
102 return;
103 }
104 sc->sc_mask |= BTNSTAT_POWER;
105 hdlg_enable_pldintr(INTEN_PWRSW);
106
107 /* reset button */
108 sc->sc_smpsw[1].smpsw_name = device_xname(self);
109 sc->sc_smpsw[1].smpsw_type = PSWITCH_TYPE_RESET;
110 if (sysmon_pswitch_register(&sc->sc_smpsw[1]) != 0) {
111 aprint_error(": unable to register reset button with sysmon\n");
112 return;
113 }
114 sc->sc_mask |= BTNSTAT_RESET;
115
116 sc->sc_ih = i80321_intr_establish(oba->oba_irq, IPL_TTY, btn_intr, sc);
117 if (sc->sc_ih == NULL) {
118 aprint_error(": couldn't establish intr handler");
119 return;
120 }
121 hdlg_enable_pldintr(INTEN_BUTTON);
122
123 aprint_normal("\n");
124 }
125
126 static int
btn_intr(void * arg)127 btn_intr(void *arg)
128 {
129 struct btn_obio_softc *sc = (void *)arg;
130 int status;
131 int rv;
132
133 status = (int8_t)bus_space_read_1(sc->sc_iot, sc->sc_ioh, 0);
134 if (status == -1) {
135 return 0;
136 }
137
138 rv = 0;
139 status = ~status;
140 if (status & BTNSTAT_POWER) {
141 if (sc->sc_mask & BTNSTAT_POWER) {
142 hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
143 i80321_intr_disestablish(sc->sc_ih);
144 sc->sc_ih = NULL;
145 sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
146 &sc->sc_smpsw[0]);
147 } else {
148 aprint_error("%s: power button pressed\n",
149 device_xname(sc->sc_dev));
150 }
151 rv = 1;
152 } else if (status & BTNSTAT_RESET) {
153 if (sc->sc_mask & BTNSTAT_RESET) {
154 hdlg_disable_pldintr(INTEN_PWRSW|INTEN_BUTTON);
155 i80321_intr_disestablish(sc->sc_ih);
156 sc->sc_ih = NULL;
157 sysmon_task_queue_sched(0, btn_sysmon_pressed_event,
158 &sc->sc_smpsw[1]);
159 } else {
160 aprint_error("%s: reset button pressed\n",
161 device_xname(sc->sc_dev));
162 }
163 rv = 1;
164 }
165
166 return rv;
167 }
168
169 static void
btn_sysmon_pressed_event(void * arg)170 btn_sysmon_pressed_event(void *arg)
171 {
172 struct sysmon_pswitch *smpsw = (void *)arg;
173
174 sysmon_pswitch_event(smpsw, PSWITCH_EVENT_PRESSED);
175 }
176