1/*	$NetBSD$	*/
2
3/*
4 * Copyright (c) 2014  Genetec Corporation.  All rights reserved.
5 * Written by Hashimoto Kenichi for Genetec Corporation.
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 GENETEC CORPORATION ``AS IS'' AND
17 * 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 GENETEC CORPORATION
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, "$NetBSD$");
31
32#include <sys/param.h>
33#include <sys/systm.h>
34#include <sys/device.h>
35#include <sys/gpio.h>
36
37#include <dev/gpio/gpiovar.h>
38#include <dev/sysmon/sysmonvar.h>
39#include <dev/sysmon/sysmon_taskq.h>
40
41#include <dev/gpio/gpiovar.h>
42
43#include <evbarm/netwalker/netwalker.h>
44
45#define PWR_PIN_INPUT	0
46#define PWR_NPINS	1
47
48
49struct netwalker_pwr_softc {
50	device_t sc_dev;
51	void *sc_gpio;
52	void *sc_intr;
53
54	struct gpio_pinmap sc_map;
55	int sc_map_pins[PWR_NPINS];
56
57	struct sysmon_pswitch sc_smpsw;
58	int sc_state;
59};
60
61static int netwalker_pwr_match(device_t, cfdata_t, void *);
62static void netwalker_pwr_attach(device_t, device_t, void *);
63static int netwalker_pwr_detach(device_t, int);
64
65CFATTACH_DECL_NEW(netwalker_pwr, sizeof(struct netwalker_pwr_softc),
66    netwalker_pwr_match, netwalker_pwr_attach, netwalker_pwr_detach, NULL);
67
68static void netwalker_pwr_refresh(void *);
69static int netwalker_pwr_intr(void *);
70
71
72static int
73netwalker_pwr_match(device_t parent, cfdata_t cf, void * aux)
74{
75	struct gpio_attach_args *ga = aux;
76
77	if (strcmp(ga->ga_dvname, cf->cf_name))
78		return 0;
79	if (ga->ga_offset == -1)
80		return 0;
81	/* check that we have enough pins */
82	if (gpio_npins(ga->ga_mask) != PWR_NPINS) {
83		aprint_debug("%s: invalid pin mask 0x%02x\n", cf->cf_name,
84		    ga->ga_mask);
85		return 0;
86	}
87
88	return 1;
89}
90
91static void
92netwalker_pwr_attach(device_t parent, device_t self, void *aux)
93{
94	struct netwalker_pwr_softc *sc = device_private(self);
95	struct gpio_attach_args *ga = aux;
96	int caps;
97
98	sc->sc_dev = self;
99	sc->sc_gpio = ga->ga_gpio;
100
101	/* map pins */
102	sc->sc_map.pm_map = sc->sc_map_pins;
103	if (gpio_pin_map(sc->sc_gpio, ga->ga_offset, ga->ga_mask, &sc->sc_map)) {
104		aprint_error(": couldn't map the pins\n");
105		return;
106	}
107
108	/* configure the input pin */
109	caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, PWR_PIN_INPUT);
110	if (!(caps & GPIO_PIN_INPUT)) {
111		aprint_error(": pin is unable to read input\n");
112		gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
113		return;
114	}
115	gpio_pin_ctl(sc->sc_gpio, &sc->sc_map, PWR_PIN_INPUT,
116	    GPIO_PIN_INPUT);
117
118	sc->sc_intr = intr_establish(GPIO1_IRQBASE + ga->ga_offset,
119	    IPL_VM, IST_EDGE_BOTH, netwalker_pwr_intr, sc);
120	if (sc->sc_intr == NULL) {
121		aprint_error(": couldn't establish interrupt\n");
122		gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
123		return;
124	}
125
126	aprint_normal(": NETWALKER power button\n");
127	aprint_naive(": NETWALKER power button\n");
128
129	if (!pmf_device_register(sc->sc_dev, NULL, NULL)) {
130		aprint_error_dev(sc->sc_dev,
131		    "couldn't establish power handler\n");
132	}
133
134	sysmon_task_queue_init();
135	sc->sc_smpsw.smpsw_name = device_xname(self);
136	sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_POWER;
137	sc->sc_state = PSWITCH_EVENT_RELEASED;
138	sysmon_pswitch_register(&sc->sc_smpsw);
139}
140
141static int
142netwalker_pwr_detach(device_t self, int flags)
143{
144	struct netwalker_pwr_softc *sc = device_private(self);
145
146	if (sc->sc_intr != NULL)
147		intr_disestablish(sc->sc_intr);
148
149	gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
150	pmf_device_deregister(self);
151	sysmon_task_queue_fini();
152
153	return 0;
154}
155
156static int
157netwalker_pwr_intr(void *v)
158{
159	struct netwalker_pwr_softc *sc = v;
160
161	sysmon_task_queue_sched(0, netwalker_pwr_refresh, sc);
162	return 1;
163}
164
165static void
166netwalker_pwr_refresh(void *v)
167{
168	struct netwalker_pwr_softc *sc = v;
169	int pwr;
170	int event;
171
172	pwr = gpio_pin_read(sc->sc_gpio, &sc->sc_map, PWR_PIN_INPUT);
173	event = (pwr == GPIO_PIN_HIGH) ?
174	    PSWITCH_EVENT_RELEASED : PSWITCH_EVENT_PRESSED;
175
176	/* crude way to avoid duplicate events */
177	if(event == sc->sc_state)
178		return;
179
180	sc->sc_state = event;
181	/* report the event */
182	sysmon_pswitch_event(&sc->sc_smpsw, event);
183}
184