1 /*-
2 * Copyright (c) 2000 Takanori Watanabe
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: src/sys/dev/acpica/acpi_acad.c,v 1.39 2009/06/05 18:44:36 jkim Exp
27 */
28
29 #include "opt_acpi.h"
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/bus.h>
33
34 #include <sys/rman.h>
35 #include <sys/malloc.h>
36 #include <sys/module.h>
37 #include <sys/conf.h>
38 #include <sys/power.h>
39
40 #include "acpi.h"
41
42 #include <dev/acpica/acpivar.h>
43 #include <dev/acpica/acpiio.h>
44 #include <bus/isa/isavar.h>
45 #include <bus/isa/pnpvar.h>
46
47 /* Hooks for the ACPI CA debugging infrastructure */
48 #define _COMPONENT ACPI_AC_ADAPTER
49 ACPI_MODULE_NAME("AC_ADAPTER")
50
51 /* Number of times to retry initialization before giving up. */
52 #define ACPI_ACAD_RETRY_MAX 6
53
54 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
55
56 struct acpi_acad_softc {
57 int status;
58 };
59
60 static void acpi_acad_get_status(void *);
61 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
62 static int acpi_acad_probe(device_t);
63 static int acpi_acad_attach(device_t);
64 static int acpi_acad_ioctl(u_long, caddr_t, void *);
65 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
66 static void acpi_acad_init_acline(void *arg);
67 static void acpi_acad_ac_only(void *arg);
68
69 static device_method_t acpi_acad_methods[] = {
70 /* Device interface */
71 DEVMETHOD(device_probe, acpi_acad_probe),
72 DEVMETHOD(device_attach, acpi_acad_attach),
73
74 DEVMETHOD_END
75 };
76
77 static driver_t acpi_acad_driver = {
78 "acpi_acad",
79 acpi_acad_methods,
80 sizeof(struct acpi_acad_softc),
81 };
82
83 static devclass_t acpi_acad_devclass;
84 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, NULL, NULL);
85 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
86
87 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
88
89 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
90
91 static void
92 acpi_acad_get_status(void *context)
93 {
94 struct acpi_acad_softc *sc;
95 device_t dev;
96 ACPI_HANDLE h;
97 int newstatus;
98
99 dev = context;
100 sc = device_get_softc(dev);
101 h = acpi_get_handle(dev);
102 newstatus = -1;
103 acpi_GetInteger(h, "_PSR", &newstatus);
104
105 /* If status is valid and has changed, notify the system. */
106 ACPI_SERIAL_BEGIN(acad);
107 if (newstatus != -1 && sc->status != newstatus) {
108 sc->status = newstatus;
109 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
110 POWER_PROFILE_ECONOMY);
111 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
112 "%s Line\n", newstatus ? "On" : "Off");
113 acpi_UserNotify("ACAD", h, newstatus);
114 }
115 ACPI_SERIAL_END(acad);
116 }
117
118 static void
119 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
120 {
121 device_t dev;
122
123 dev = (device_t)context;
124 switch (notify) {
125 case ACPI_NOTIFY_BUS_CHECK:
126 case ACPI_NOTIFY_DEVICE_CHECK:
127 case ACPI_POWERSOURCE_STAT_CHANGE:
128 /* Temporarily. It is better to notify policy manager */
129 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
130 break;
131 default:
132 device_printf(dev, "unknown notify %#x\n", notify);
133 break;
134 }
135 }
136
137 static int
138 acpi_acad_probe(device_t dev)
139 {
140 static char *acad_ids[] = { "ACPI0003", NULL };
141
142 if (acpi_disabled("acad") ||
143 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
144 return (ENXIO);
145
146 device_set_desc(dev, "AC Adapter");
147 return (0);
148 }
149
150 static int
151 acpi_acad_attach(device_t dev)
152 {
153 struct acpi_acad_softc *sc;
154 struct acpi_softc *acpi_sc;
155 ACPI_HANDLE handle;
156 int error;
157
158 sc = device_get_softc(dev);
159 handle = acpi_get_handle(dev);
160
161 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
162 if (error != 0)
163 return (error);
164
165 ACPI_SERIAL_INIT(acad);
166
167 if (device_get_unit(dev) == 0) {
168 acpi_sc = acpi_device_get_parent_softc(dev);
169 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
170 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
171 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
172 &sc->status, 0, acpi_acad_sysctl, "I", "");
173 }
174
175 /* Get initial status after whole system is up. */
176 sc->status = -1;
177
178 /*
179 * Install both system and device notify handlers since the Casio
180 * FIVA needs them.
181 */
182 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
183 acpi_acad_notify_handler, dev);
184 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
185
186 return (0);
187 }
188
189 static int
190 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
191 {
192 struct acpi_acad_softc *sc;
193 device_t dev;
194
195 dev = (device_t)arg;
196 sc = device_get_softc(dev);
197
198 /*
199 * No security check required: information retrieval only. If
200 * new functions are added here, a check might be required.
201 */
202 switch (cmd) {
203 case ACPIIO_ACAD_GET_STATUS:
204 acpi_acad_get_status(dev);
205 *(int *)addr = sc->status;
206 break;
207 default:
208 break;
209 }
210
211 return (0);
212 }
213
214 static int
215 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
216 {
217 int val, error;
218
219 if (acpi_acad_get_acline(&val) != 0)
220 return (ENXIO);
221
222 val = *(u_int *)oidp->oid_arg1;
223 error = sysctl_handle_int(oidp, &val, 0, req);
224 return (error);
225 }
226
227 static void
228 acpi_acad_init_acline(void *arg)
229 {
230 struct acpi_acad_softc *sc;
231 device_t dev;
232 int retry;
233
234 dev = (device_t)arg;
235 sc = device_get_softc(dev);
236 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
237 "acline initialization start\n");
238
239 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
240 acpi_acad_get_status(dev);
241 if (sc->status != -1)
242 break;
243 AcpiOsSleep(10000);
244 }
245
246 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
247 "acline initialization done, tried %d times\n", retry + 1);
248 }
249
250 /*
251 * If no AC line devices detected after boot, create an "online" event
252 * so that userland code can adjust power settings accordingly. The default
253 * power profile is "performance" so we don't need to repeat that here.
254 */
255 static void
256 acpi_acad_ac_only(void __unused *arg)
257 {
258
259 if (devclass_get_count(acpi_acad_devclass) == 0)
260 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
261 }
262
263 /*
264 * Public interfaces.
265 */
266 int
267 acpi_acad_get_acline(int *status)
268 {
269 struct acpi_acad_softc *sc;
270 device_t dev;
271
272 dev = devclass_get_device(acpi_acad_devclass, 0);
273 if (dev == NULL)
274 return (ENXIO);
275 sc = device_get_softc(dev);
276
277 acpi_acad_get_status(dev);
278 *status = sc->status;
279
280 return (0);
281 }
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