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: releng/5.3/sys/dev/acpica/acpi_battery.c 133614 2004-08-13 06:21:41Z 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
41 MALLOC_DEFINE(M_ACPIBATT, "acpibatt", "ACPI generic battery data");
42
43 struct acpi_batteries {
44 TAILQ_ENTRY(acpi_batteries) link;
45 struct acpi_battdesc battdesc;
46 };
47
48 static TAILQ_HEAD(,acpi_batteries) acpi_batteries;
49 static int acpi_batteries_initted;
50 static int acpi_batteries_units;
51 static int acpi_battery_info_expire = 5;
52 static struct acpi_battinfo acpi_battery_battinfo;
53 ACPI_SERIAL_DECL(battery, "ACPI generic battery");
54
55 int
56 acpi_battery_get_info_expire(void)
57 {
58 return (acpi_battery_info_expire);
59 }
60
61 int
62 acpi_battery_get_units(void)
63 {
64 return (acpi_batteries_units);
65 }
66
67 int
68 acpi_battery_get_battdesc(int logical_unit, struct acpi_battdesc *battdesc)
69 {
70 struct acpi_batteries *bp;
71 int error, i;
72
73 error = ENXIO;
74 ACPI_SERIAL_BEGIN(battery);
75 if (logical_unit < 0 || logical_unit >= acpi_batteries_units)
76 goto out;
77
78 i = 0;
79 TAILQ_FOREACH(bp, &acpi_batteries, link) {
80 if (logical_unit == i) {
81 battdesc->type = bp->battdesc.type;
82 battdesc->phys_unit = bp->battdesc.phys_unit;
83 error = 0;
84 break;
85 }
86 i++;
87 }
88
89 out:
90 ACPI_SERIAL_END(battery);
91 return (error);
92 }
93
94 int
95 acpi_battery_get_battinfo(int unit, struct acpi_battinfo *battinfo)
96 {
97 struct acpi_battdesc battdesc;
98 int error;
99
100 error = 0;
101 if (unit == -1) {
102 error = acpi_cmbat_get_battinfo(-1, battinfo);
103 goto out;
104 } else {
105 error = acpi_battery_get_battdesc(unit, &battdesc);
106 if (error != 0)
107 goto out;
108
109 switch (battdesc.type) {
110 case ACPI_BATT_TYPE_CMBAT:
111 error = acpi_cmbat_get_battinfo(battdesc.phys_unit, battinfo);
112 break;
113 default:
114 error = ENXIO;
115 break;
116 }
117 }
118
119 out:
120 return (error);
121 }
122
123 static int
124 acpi_battery_ioctl(u_long cmd, caddr_t addr, void *arg)
125 {
126 union acpi_battery_ioctl_arg *ioctl_arg;
127 int error, logical_unit;
128
129 ioctl_arg = (union acpi_battery_ioctl_arg *)addr;
130 error = 0;
131
132 /*
133 * No security check required: information retrieval only. If
134 * new functions are added here, a check might be required.
135 */
136 switch (cmd) {
137 case ACPIIO_BATT_GET_UNITS:
138 *(int *)addr = acpi_battery_get_units();
139 break;
140 case ACPIIO_BATT_GET_BATTDESC:
141 logical_unit = ioctl_arg->unit;
142 error = acpi_battery_get_battdesc(logical_unit, &ioctl_arg->battdesc);
143 break;
144 case ACPIIO_BATT_GET_BATTINFO:
145 logical_unit = ioctl_arg->unit;
146 error = acpi_battery_get_battinfo(logical_unit, &ioctl_arg->battinfo);
147 break;
148 default:
149 error = EINVAL;
150 break;
151 }
152
153 return (error);
154 }
155
156 static int
157 acpi_battery_sysctl(SYSCTL_HANDLER_ARGS)
158 {
159 int val, error;
160
161 acpi_battery_get_battinfo(-1, &acpi_battery_battinfo);
162 val = *(u_int *)oidp->oid_arg1;
163 error = sysctl_handle_int(oidp, &val, 0, req);
164 return (error);
165 }
166
167 static int
168 acpi_battery_init(void)
169 {
170 struct acpi_softc *sc;
171 device_t dev;
172 int error;
173
174 ACPI_SERIAL_ASSERT(battery);
175
176 error = ENXIO;
177 dev = devclass_get_device(devclass_find("acpi"), 0);
178 if (dev == NULL)
179 goto out;
180 sc = device_get_softc(dev);
181
182 TAILQ_INIT(&acpi_batteries);
183
184 /* XXX We should back out registered ioctls on error. */
185 error = acpi_register_ioctl(ACPIIO_BATT_GET_UNITS, acpi_battery_ioctl,
186 NULL);
187 if (error != 0)
188 goto out;
189 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTDESC, acpi_battery_ioctl,
190 NULL);
191 if (error != 0)
192 goto out;
193 error = acpi_register_ioctl(ACPIIO_BATT_GET_BATTINFO, acpi_battery_ioctl,
194 NULL);
195 if (error != 0)
196 goto out;
197
198 sysctl_ctx_init(&sc->acpi_battery_sysctl_ctx);
199 sc->acpi_battery_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_battery_sysctl_ctx,
200 SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO, "battery", CTLFLAG_RD,
201 0, "");
202 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
203 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
204 OID_AUTO, "life", CTLTYPE_INT | CTLFLAG_RD,
205 &acpi_battery_battinfo.cap, 0, acpi_battery_sysctl, "I", "");
206 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
207 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
208 OID_AUTO, "time", CTLTYPE_INT | CTLFLAG_RD,
209 &acpi_battery_battinfo.min, 0, acpi_battery_sysctl, "I", "");
210 SYSCTL_ADD_PROC(&sc->acpi_battery_sysctl_ctx,
211 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
212 OID_AUTO, "state", CTLTYPE_INT | CTLFLAG_RD,
213 &acpi_battery_battinfo.state, 0, acpi_battery_sysctl, "I", "");
214 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
215 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
216 OID_AUTO, "units", CTLFLAG_RD, &acpi_batteries_units, 0, "");
217 SYSCTL_ADD_INT(&sc->acpi_battery_sysctl_ctx,
218 SYSCTL_CHILDREN(sc->acpi_battery_sysctl_tree),
219 OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
220 &acpi_battery_info_expire, 0, "");
221
222 acpi_batteries_initted = TRUE;
223
224 out:
225 return (error);
226 }
227
228 int
229 acpi_battery_register(int type, int phys_unit)
230 {
231 struct acpi_batteries *bp;
232 int error;
233
234 error = 0;
235 bp = malloc(sizeof(*bp), M_ACPIBATT, M_NOWAIT);
236 if (bp == NULL)
237 return (ENOMEM);
238
239 ACPI_SERIAL_BEGIN(battery);
240 if (!acpi_batteries_initted && (error = acpi_battery_init()) != 0) {
241 printf("acpi_battery_register failed for unit %d\n", phys_unit);
242 goto out;
243 }
244 bp->battdesc.type = type;
245 bp->battdesc.phys_unit = phys_unit;
246 TAILQ_INSERT_TAIL(&acpi_batteries, bp, link);
247 acpi_batteries_units++;
248
249 out:
250 ACPI_SERIAL_END(battery);
251 if (error)
252 free(bp, M_ACPIBATT);
253 return (error);
254 }
255
256 int
257 acpi_battery_remove(int type, int phys_unit)
258 {
259 struct acpi_batteries *bp, *tmp;
260 int ret;
261
262 ret = ENOENT;
263 ACPI_SERIAL_BEGIN(battery);
264 TAILQ_FOREACH_SAFE(bp, &acpi_batteries, link, tmp) {
265 if (bp->battdesc.type == type && bp->battdesc.phys_unit == phys_unit) {
266 TAILQ_REMOVE(&acpi_batteries, bp, link);
267 acpi_batteries_units--;
268 ret = 0;
269 break;
270 }
271 }
272 ACPI_SERIAL_END(battery);
273 if (ret == 0)
274 free(bp, M_ACPIBATT);
275 return (ret);
276 }
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