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1 /*-
2  * Copyright (c) 2000 KIYOHARA Takashi <kiyohara@kk.iij4u.ne.jp>
3  * Copyright (c) 2000 Takanori Watanabe <takawata@jp.FreeBSD.org>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD$
28  */
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/eventhandler.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/reboot.h>
37
38 #include <machine/bus.h>
39 #include <machine/resource.h>
40 #include <sys/rman.h>
41
42 #include <pc98/pc98/canbusvars.h>
43 #include "canbus_if.h"
44
45
46 /* canbepm softc */
47 struct canbepm_softc {
48         device_t canbepm_dev;                   /* canbepm device */
49
50         eventhandler_tag canbepm_tag;           /* event handler tag */
51 };
52
53
54 static void     canbepm_soft_off (void *, int);
55 static void     canbepm_identify (driver_t *, device_t);
56 static int      canbepm_probe (device_t);
57 static int      canbepm_attach (device_t);
58 static int      canbepm_detach (device_t);
59
60
61 static device_method_t canbepm_methods[] = { 
62         DEVMETHOD(device_identify,      canbepm_identify),
63         DEVMETHOD(device_probe,         canbepm_probe),
64         DEVMETHOD(device_attach,        canbepm_attach),
65         DEVMETHOD(device_detach,        canbepm_detach),
66         {0, 0}
67 };
68
69 static driver_t canbepm_driver = {
70         "canbepm",
71         canbepm_methods,
72         sizeof(struct canbepm_softc),
73 };
74
75 devclass_t canbepm_devclass;
76 DRIVER_MODULE(canbepm, canbus, canbepm_driver, canbepm_devclass, 0, 0);
77 MODULE_DEPEND(canbepm, canbus, 1, 1, 1);
78
79
80 static void
81 canbepm_soft_off (void *data, int howto)
82 {
83         struct canbepm_softc *sc = data;
84         u_int8_t poweroff_data[] = CANBE_POWEROFF_DATA;
85
86         if (!(howto & RB_POWEROFF))
87                 return;
88
89         CANBUS_WRITE_MULTI(device_get_parent(sc->canbepm_dev), sc->canbepm_dev,
90             CANBE_POWER_CTRL, sizeof (poweroff_data), poweroff_data);
91 }
92
93
94 static void
95 canbepm_identify(driver_t *drv, device_t parent)
96 {
97         if (device_find_child(parent, "canbepm", 0) == NULL) {
98                 if (BUS_ADD_CHILD(parent, 33, "canbepm", 0) == NULL)
99                         device_printf(parent, "canbepm cannot attach\n");
100         }
101 }
102
103
104 static int
105 canbepm_probe(device_t dev)
106 {
107         device_set_desc(dev, "CanBe Power Management Controller");
108
109         return (0);     
110 }
111
112 static int
113 canbepm_attach(device_t dev)
114 {
115         struct canbepm_softc *sc = device_get_softc(dev);
116
117         /* eventhandler regist */
118         sc->canbepm_tag = EVENTHANDLER_REGISTER(
119             shutdown_final, canbepm_soft_off, sc, SHUTDOWN_PRI_LAST);
120
121         sc->canbepm_dev = dev;
122
123         return (0);
124 }
125
126
127 static int
128 canbepm_detach(device_t dev)
129 {
130         struct canbepm_softc *sc = device_get_softc(dev);
131
132         /* eventhandler deregist */
133         EVENTHANDLER_DEREGISTER(shutdown_final, sc->canbepm_tag);
134         BUS_CHILD_DETACHED(device_get_parent(dev), dev);
135
136         return (0);
137 }