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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include "opt_acpi.h"
31 #include <sys/param.h>
32 #include <sys/kernel.h>
33 #include <sys/bus.h>
34
35 #include <machine/bus.h>
36 #include <sys/rman.h>
37 #include <sys/eventhandler.h>
38 #include <sys/ioccom.h>
39 #include <sys/malloc.h>
40 #include <sys/module.h>
41 #include <sys/conf.h>
42 #include <sys/power.h>
43
44 #include <contrib/dev/acpica/include/acpi.h>
45
46 #include <dev/acpica/acpivar.h>
47 #include <dev/acpica/acpiio.h>
48 #include <isa/isavar.h>
49 #include <isa/pnpvar.h>
50
51 /* Hooks for the ACPI CA debugging infrastructure */
52 #define _COMPONENT ACPI_AC_ADAPTER
53 ACPI_MODULE_NAME("AC_ADAPTER")
54
55 /* Number of times to retry initialization before giving up. */
56 #define ACPI_ACAD_RETRY_MAX 6
57
58 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
59
60 struct acpi_acad_softc {
61 int status;
62 };
63
64 static void acpi_acad_get_status(void *);
65 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
66 static int acpi_acad_probe(device_t);
67 static int acpi_acad_attach(device_t);
68 static int acpi_acad_ioctl(u_long, caddr_t, void *);
69 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
70 static void acpi_acad_init_acline(void *arg);
71 static void acpi_acad_ac_only(void *arg);
72
73 static device_method_t acpi_acad_methods[] = {
74 /* Device interface */
75 DEVMETHOD(device_probe, acpi_acad_probe),
76 DEVMETHOD(device_attach, acpi_acad_attach),
77
78 DEVMETHOD_END
79 };
80
81 static driver_t acpi_acad_driver = {
82 "acpi_acad",
83 acpi_acad_methods,
84 sizeof(struct acpi_acad_softc),
85 };
86
87 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, 0, 0);
88 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
89
90 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
91
92 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
93
94 static void
95 acpi_acad_get_status(void *context)
96 {
97 struct acpi_acad_softc *sc;
98 device_t dev;
99 ACPI_HANDLE h;
100 int newstatus;
101
102 dev = context;
103 sc = device_get_softc(dev);
104 h = acpi_get_handle(dev);
105 newstatus = -1;
106 acpi_GetInteger(h, "_PSR", &newstatus);
107
108 /* If status is valid and has changed, notify the system. */
109 ACPI_SERIAL_BEGIN(acad);
110 if (newstatus != -1 && sc->status != newstatus) {
111 sc->status = newstatus;
112 ACPI_SERIAL_END(acad);
113 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
114 POWER_PROFILE_ECONOMY);
115 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
116 "%s Line\n", newstatus ? "On" : "Off");
117 acpi_UserNotify("ACAD", h, newstatus);
118 EVENTHANDLER_INVOKE(acpi_acad_event, newstatus);
119 } else
120 ACPI_SERIAL_END(acad);
121 }
122
123 static void
124 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
125 {
126 device_t dev;
127
128 dev = (device_t)context;
129 switch (notify) {
130 case ACPI_NOTIFY_BUS_CHECK:
131 case ACPI_NOTIFY_DEVICE_CHECK:
132 case ACPI_POWERSOURCE_STAT_CHANGE:
133 /* Temporarily. It is better to notify policy manager */
134 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
135 break;
136 default:
137 device_printf(dev, "unknown notify %#x\n", notify);
138 break;
139 }
140 }
141
142 static int
143 acpi_acad_probe(device_t dev)
144 {
145 static char *acad_ids[] = { "ACPI0003", NULL };
146 int rv;
147
148 if (acpi_disabled("acad"))
149 return (ENXIO);
150 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids, NULL);
151 if (rv <= 0)
152 device_set_desc(dev, "AC Adapter");
153 return (rv);
154 }
155
156 static int
157 acpi_acad_attach(device_t dev)
158 {
159 struct acpi_acad_softc *sc;
160 struct acpi_softc *acpi_sc;
161 ACPI_HANDLE handle;
162 int error;
163
164 sc = device_get_softc(dev);
165 handle = acpi_get_handle(dev);
166
167 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
168 if (error != 0)
169 return (error);
170
171 if (device_get_unit(dev) == 0) {
172 acpi_sc = acpi_device_get_parent_softc(dev);
173 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
174 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, "acline",
175 CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, dev, 0,
176 acpi_acad_sysctl, "I", "");
177 }
178
179 /* Get initial status after whole system is up. */
180 sc->status = -1;
181
182 /*
183 * Install both system and device notify handlers since the Casio
184 * FIVA needs them.
185 */
186 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
187 acpi_acad_notify_handler, dev);
188 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
189
190 return (0);
191 }
192
193 static int
194 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
195 {
196 struct acpi_acad_softc *sc;
197 device_t dev;
198
199 dev = (device_t)arg;
200 sc = device_get_softc(dev);
201
202 /*
203 * No security check required: information retrieval only. If
204 * new functions are added here, a check might be required.
205 */
206 switch (cmd) {
207 case ACPIIO_ACAD_GET_STATUS:
208 acpi_acad_get_status(dev);
209 *(int *)addr = sc->status;
210 break;
211 default:
212 break;
213 }
214
215 return (0);
216 }
217
218 static int
219 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
220 {
221 device_t dev = oidp->oid_arg1;
222 struct acpi_acad_softc *sc = device_get_softc(dev);
223 int val;
224
225 acpi_acad_get_status(dev);
226 val = sc->status;
227 return (sysctl_handle_int(oidp, &val, 0, req));
228 }
229
230 static void
231 acpi_acad_init_acline(void *arg)
232 {
233 struct acpi_acad_softc *sc;
234 device_t dev;
235 int retry;
236
237 dev = (device_t)arg;
238 sc = device_get_softc(dev);
239 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
240 "acline initialization start\n");
241
242 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
243 acpi_acad_get_status(dev);
244 if (sc->status != -1)
245 break;
246 AcpiOsSleep(10000);
247 }
248
249 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
250 "acline initialization done, tried %d times\n", retry + 1);
251 }
252
253 /*
254 * If no AC line devices detected after boot, create an "online" event
255 * so that userland code can adjust power settings accordingly. The default
256 * power profile is "performance" so we don't need to repeat that here.
257 */
258 static void
259 acpi_acad_ac_only(void __unused *arg)
260 {
261
262 if (devclass_get_count(devclass_find("acpi_acad")) == 0)
263 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
264 }
265
266 /*
267 * Public interfaces.
268 */
269 int
270 acpi_acad_get_acline(int *status)
271 {
272 struct acpi_acad_softc *sc;
273 device_t dev;
274
275 dev = devclass_get_device(devclass_find("acpi_acad"), 0);
276 if (dev == NULL)
277 return (ENXIO);
278 sc = device_get_softc(dev);
279
280 acpi_acad_get_status(dev);
281 *status = sc->status;
282
283 return (0);
284 }
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