1 /* $NetBSD: netwalker_lid.c,v 1.1 2014/05/06 11:08:51 hkenken Exp $ */
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: netwalker_lid.c,v 1.1 2014/05/06 11:08:51 hkenken Exp $");
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 LID_PIN_INPUT 0
46 #define LID_NPINS 1
47
48 struct netwalker_lid_softc {
49 device_t sc_dev;
50 void *sc_gpio;
51 void *sc_intr;
52
53 struct gpio_pinmap sc_map;
54 int sc_map_pins[LID_NPINS];
55
56 struct sysmon_pswitch sc_smpsw;
57 int sc_state;
58 };
59
60 static int netwalker_lid_match(device_t, cfdata_t, void *);
61 static void netwalker_lid_attach(device_t, device_t, void *);
62 static int netwalker_lid_detach(device_t, int);
63
64 CFATTACH_DECL_NEW(netwalker_lid, sizeof(struct netwalker_lid_softc),
65 netwalker_lid_match, netwalker_lid_attach, netwalker_lid_detach, NULL);
66
67 static void netwalker_lid_refresh(void *);
68 static int netwalker_lid_intr(void *);
69
70
71 static int
netwalker_lid_match(device_t parent,cfdata_t cf,void * aux)72 netwalker_lid_match(device_t parent, cfdata_t cf, void * aux)
73 {
74 struct gpio_attach_args *ga = aux;
75
76 if (strcmp(ga->ga_dvname, cf->cf_name))
77 return 0;
78 if (ga->ga_offset == -1)
79 return 0;
80 /* check that we have enough pins */
81 if (gpio_npins(ga->ga_mask) != LID_NPINS) {
82 aprint_debug("%s: invalid pin mask 0x%02x\n", cf->cf_name,
83 ga->ga_mask);
84 return 0;
85 }
86
87 return 1;
88 }
89
90 static void
netwalker_lid_attach(device_t parent,device_t self,void * aux)91 netwalker_lid_attach(device_t parent, device_t self, void *aux)
92 {
93 struct netwalker_lid_softc *sc = device_private(self);
94 struct gpio_attach_args *ga = aux;
95 int caps;
96
97 sc->sc_dev = self;
98 sc->sc_gpio = ga->ga_gpio;
99
100 /* map pins */
101 sc->sc_map.pm_map = sc->sc_map_pins;
102 if (gpio_pin_map(sc->sc_gpio, ga->ga_offset, ga->ga_mask, &sc->sc_map)) {
103 aprint_error(": couldn't map the pins\n");
104 return;
105 }
106
107 /* configure the input pin */
108 caps = gpio_pin_caps(sc->sc_gpio, &sc->sc_map, LID_PIN_INPUT);
109 if (!(caps & GPIO_PIN_INPUT)) {
110 aprint_error(": pin is unable to read input\n");
111 gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
112 return;
113 }
114 gpio_pin_ctl(sc->sc_gpio, &sc->sc_map, LID_PIN_INPUT,
115 GPIO_PIN_INPUT);
116
117 sc->sc_intr = intr_establish(GPIO3_IRQBASE + ga->ga_offset,
118 IPL_VM, IST_EDGE_BOTH, netwalker_lid_intr, sc);
119 if (sc->sc_intr == NULL) {
120 aprint_error(": couldn't establish interrupt\n");
121 gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
122 return;
123 }
124
125 aprint_normal(": NETWALKER lid switch\n");
126 aprint_naive(": NETWALKER lid switch\n");
127
128 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) {
129 aprint_error_dev(sc->sc_dev,
130 "couldn't establish lid handler\n");
131 }
132
133 sysmon_task_queue_init();
134 sc->sc_smpsw.smpsw_name = device_xname(self);
135 sc->sc_smpsw.smpsw_type = PSWITCH_TYPE_LID;
136 sc->sc_state = PSWITCH_EVENT_RELEASED;
137 sysmon_pswitch_register(&sc->sc_smpsw);
138 }
139
140 static int
netwalker_lid_detach(device_t self,int flags)141 netwalker_lid_detach(device_t self, int flags)
142 {
143 struct netwalker_lid_softc *sc = device_private(self);
144
145 if (sc->sc_intr != NULL)
146 intr_disestablish(sc->sc_intr);
147
148 gpio_pin_unmap(sc->sc_gpio, &sc->sc_map);
149 pmf_device_deregister(self);
150 sysmon_task_queue_fini();
151 return 0;
152 }
153
154 static int
netwalker_lid_intr(void * v)155 netwalker_lid_intr(void *v)
156 {
157 struct netwalker_lid_softc *sc = v;
158
159 sysmon_task_queue_sched(0, netwalker_lid_refresh, sc);
160 return 1;
161 }
162
163 static void
netwalker_lid_refresh(void * v)164 netwalker_lid_refresh(void *v)
165 {
166 struct netwalker_lid_softc *sc = v;
167 int lid;
168 int event;
169
170 lid = gpio_pin_read(sc->sc_gpio, &sc->sc_map, LID_PIN_INPUT);
171 event = (lid == GPIO_PIN_HIGH) ?
172 PSWITCH_EVENT_RELEASED : PSWITCH_EVENT_PRESSED;
173
174 /* crude way to avoid duplicate events */
175 if(event == sc->sc_state)
176 return;
177
178 sc->sc_state = event;
179 /* report the event */
180 sysmon_pswitch_event(&sc->sc_smpsw, event);
181 }
182