acpi_battery.c revision 132049 
1/*-
2 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$FreeBSD: head/sys/dev/acpica/acpi_battery.c 132049 2004-07-12 20:53:04Z njl $
27 */
28
29#include "opt_acpi.h"
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/malloc.h>
33#include <sys/bus.h>
34#include <sys/ioccom.h>
35#include <sys/sysctl.h>
36
37#include "acpi.h"
38#include <dev/acpica/acpivar.h>
39#include <dev/acpica/acpiio.h>
40
41MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
42
43struct acpi_batteries {
44    TAILQ_ENTRY(acpi_batteries)	link;
45    struct acpi_battdesc	battdesc;
46};
47
48static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
49static int			acpi_batteries_initted = 0;
50static int			acpi_batteries_units = 0;
51static int			acpi_battery_info_expire = 5;
52static struct acpi_battinfo	acpi_battery_battinfo;
53
54int
55acpi_battery_get_units(void)
56{
57    return (acpi_batteries_units);
58}
59
60int
61acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
62{
63    struct acpi_batteries *bp;
64    int i;
65
66    if (logical_unit < 0 || logical_unit >= acpi_batteries_units)
67	return (ENXIO);
68
69    i = 0;
70    TAILQ_FOREACH(bp, &acpi_batteries, link) {
71	if (logical_unit == i) {
72	    battdesc->type = bp->battdesc.type;
73	    battdesc->phys_unit = bp->battdesc.phys_unit;
74	    return (0);
75	}
76	i++;
77    }
78
79    return (ENXIO);
80}
81
82int
83acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
84{
85    struct acpi_battdesc battdesc;
86    int error;
87
88    error = 0;
89    if (unit == -1) {
90	error = acpi_cmbat_get_battinfo(-1, battinfo);
91	goto out;
92    } else {
93	error = acpi_battery_get_battdesc(unit, &battdesc);
94	if (error != 0)
95	    goto out;
96
97	switch (battdesc.type) {
98	case ACPI_BATT_TYPE_CMBAT:
99	    error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo);
100	    break;
101	default:
102	    error = ENXIO;
103	    break;
104	}
105    }
106
107out:
108    return (error);
109}
110
111int
112acpi_battery_get_info_expire(void)
113{
114    return (acpi_battery_info_expire);
115}
116
117static int
118acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
119{
120    union acpi_battery_ioctl_arg *ioctl_arg;
121    int	error, logical_unit;
122
123    ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
124    error = 0;
125
126    /*
127     * No security check required: information retrieval only.  If
128     * new functions are added here, a check might be required.
129     */
130    switch (cmd) {
131    case ACPIIO_BATT_GET_UNITS:
132	*(int *)addr = acpi_battery_get_units();
133	break;
134    case ACPIIO_BATT_GET_BATTDESC:
135	logical_unit = ioctl_arg->unit;
136	error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
137	break;
138    case ACPIIO_BATT_GET_BATTINFO:
139	logical_unit = ioctl_arg->unit;
140	error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo);
141	break;
142    default:
143	error = EINVAL;
144	break;
145    }
146
147    return (error);
148}
149
150static int
151acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
152{
153    int	val, error;
154
155    acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
156    val = *(u_int *)oidp->oid_arg1;
157    error = sysctl_handle_int(oidp, &val, 0, req);
158    return (error);
159}
160
161static int
162acpi_battery_init(void)
163{
164    struct acpi_softc	*sc;
165    device_t		 dev;
166    int	 		 error;
167
168    dev = devclass_get_device(devclass_find("acpi"), 0);
169    if (dev == NULL)
170	return (ENXIO);
171    sc = device_get_softc(dev);
172    if (sc == NULL)
173	return (ENXIO);
174
175    error = 0;
176    TAILQ_INIT(&acpi_batteries);
177    acpi_batteries_initted = 1;
178
179    error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl,
180				NULL);
181    if (error != 0)
182	return (error);
183    error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl,
184				NULL);
185    if (error != 0)
186	return (error);
187    error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl,
188				NULL);
189    if (error != 0)
190	return (error);
191
192    sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
193    sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
194				   SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
195				   OID_AUTO, "battery", CTLFLAG_RD, 0, "");
196    SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
197	SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
198	OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
199	&acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
200    SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
201	SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
202	OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
203	&acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
204    SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
205	SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
206	OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
207	&acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
208    SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
209	SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
210	OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
211    SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
212	SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
213	OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
214	&acpi_battery_info_expire, 0, "");
215
216    return (error);
217}
218
219int
220acpi_battery_register(int type, int phys_unit)
221{
222    struct acpi_batteries *bp;
223    int error;
224
225    error = 0;
226    bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT);
227    if (bp == NULL)
228	return (ENOMEM);
229
230    bp->battdesc.type = type;
231    bp->battdesc.phys_unit = phys_unit;
232    if (acpi_batteries_initted == 0) {
233	if ((error = acpi_battery_init()) != 0) {
234	    free(bp, M_ACPIBATT);
235	    return (error);
236	}
237    }
238
239    TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
240    acpi_batteries_units++;
241
242    return (0);
243}
244
245int
246acpi_battery_remove(int type, int phys_unit)
247{
248    struct acpi_batteries *bp, *tmp;
249
250    TAILQ_FOREACH_SAFE(bp, &acpi_batteries, link, tmp) {
251	if (bp->battdesc.type == type && bp->battdesc.phys_unit == phys_unit) {
252	    TAILQ_REMOVE(&acpi_batteries, bp, link);
253	    acpi_batteries_units--;
254	    free(bp, M_ACPIBATT);
255	    return (0);
256	}
257    }
258    return (ENOENT);
259}
260