1/*	$NetBSD: button.c,v 1.1 2018/04/09 20:07:22 christos Exp $ */
2
3/*-
4 * Copyright (c) 2009 Michael Lorenz
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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: button.c,v 1.1 2018/04/09 20:07:22 christos Exp $");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/kernel.h>
35#include <sys/device.h>
36#include <sys/proc.h>
37#include <sys/kthread.h>
38
39#include <sys/bus.h>
40
41#include <dev/sysmon/sysmonvar.h>
42#include <dev/sysmon/sysmon_taskq.h>
43
44#include <machine/autoconf.h>
45#include <machine/machtype.h>
46
47#include <sgimips/ioc/iocreg.h>
48#include <sgimips/hpc/hpcvar.h>
49#include <sgimips/hpc/hpcreg.h>
50
51struct button_softc {
52	device_t sc_dev;
53	struct sysmon_pswitch sc_pbutton;
54	bus_space_tag_t sc_tag;
55	bus_space_handle_t sc_hreg;
56	int sc_last, sc_fired;
57};
58
59static int button_match(device_t, cfdata_t, void *);
60static void button_attach(device_t, device_t, void *);
61
62static int button_intr(void *);
63static void button_powerbutton(void *);
64
65CFATTACH_DECL_NEW(button, sizeof(struct button_softc),
66				button_match,
67				button_attach,
68				NULL,
69				NULL);
70
71static int
72button_match(device_t parent, cfdata_t match, void *aux)
73{
74	struct hpc_attach_args *ha = aux;
75
76	if (strcmp(ha->ha_name, match->cf_name) != 0)
77		return 0;
78
79	if (mach_type == MACH_SGI_IP22)
80		return 1;
81
82	return 0;
83}
84
85static void
86button_attach(device_t parent, device_t self, void *aux)
87{
88	struct button_softc *sc;
89	struct hpc_attach_args *haa;
90
91	sc = device_private(self);
92	sc->sc_dev = self;
93	haa = aux;
94	sc->sc_tag = haa->ha_st;
95	sc->sc_fired = 0;
96
97	aprint_normal("\n");
98	if (bus_space_subregion(haa->ha_st, haa->ha_sh, haa->ha_devoff,
99			0x4, 		/* just a single register */
100			&sc->sc_hreg)) {
101		aprint_error(": unable to map button register\n");
102		return;
103	}
104
105	if ((cpu_intr_establish(haa->ha_irq, IPL_BIO,
106	     button_intr, sc)) == NULL) {
107		printf(": unable to establish interrupt!\n");
108		return;
109	}
110
111	sc->sc_last = 0;
112
113	sysmon_task_queue_init();
114	memset(&sc->sc_pbutton, 0, sizeof(struct sysmon_pswitch));
115	sc->sc_pbutton.smpsw_name = device_xname(sc->sc_dev);
116	sc->sc_pbutton.smpsw_type = PSWITCH_TYPE_POWER;
117	if (sysmon_pswitch_register(&sc->sc_pbutton) != 0)
118		aprint_error_dev(sc->sc_dev,
119		    "unable to register power button with sysmon\n");
120	pmf_device_register(self, NULL, NULL);
121}
122
123static int
124button_intr(void *cookie)
125{
126	struct button_softc *sc = cookie;
127	uint8_t reg;
128
129	reg = bus_space_read_4(sc->sc_tag, sc->sc_hreg, 0);
130	bus_space_write_4(sc->sc_tag, sc->sc_hreg, 0,
131	    IOC_PANEL_VDOWN_IRQ | IOC_PANEL_VUP_IRQ | IOC_PANEL_POWER_IRQ);
132	if ((reg & IOC_PANEL_POWER_IRQ) == 0) {
133		if (!sc->sc_fired)
134			sysmon_task_queue_sched(0, button_powerbutton, sc);
135		sc->sc_fired = 1;
136	}
137	if (time_second == sc->sc_last)
138		return 1;
139	sc->sc_last = time_second;
140	if ((reg & IOC_PANEL_VDOWN_HOLD) == 0)
141		pmf_event_inject(NULL, PMFE_AUDIO_VOLUME_DOWN);
142	if ((reg & IOC_PANEL_VUP_HOLD) == 0)
143		pmf_event_inject(NULL, PMFE_AUDIO_VOLUME_UP);
144
145	return 1;
146}
147
148static void
149button_powerbutton(void *cookie)
150{
151	struct button_softc *sc = cookie;
152
153	sysmon_pswitch_event(&sc->sc_pbutton, PSWITCH_EVENT_PRESSED);
154}
155