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/ioccom.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/conf.h>
41 #include <sys/power.h>
42
43 #include <contrib/dev/acpica/acpi.h>
44 #include <dev/acpica/acpivar.h>
45 #include <dev/acpica/acpiio.h>
46 #include <isa/isavar.h>
47 #include <isa/pnpvar.h>
48
49 /* Hooks for the ACPI CA debugging infrastructure */
50 #define _COMPONENT ACPI_AC_ADAPTER
51 ACPI_MODULE_NAME("AC_ADAPTER")
52
53 /* Number of times to retry initialization before giving up. */
54 #define ACPI_ACAD_RETRY_MAX 6
55
56 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
57
58 struct acpi_acad_softc {
59 int status;
60 };
61
62 static void acpi_acad_get_status(void *);
63 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
64 static int acpi_acad_probe(device_t);
65 static int acpi_acad_attach(device_t);
66 static int acpi_acad_ioctl(u_long, caddr_t, void *);
67 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
68 static void acpi_acad_init_acline(void *arg);
69 static void acpi_acad_ac_only(void *arg);
70
71 static device_method_t acpi_acad_methods[] = {
72 /* Device interface */
73 DEVMETHOD(device_probe, acpi_acad_probe),
74 DEVMETHOD(device_attach, acpi_acad_attach),
75
76 {0, 0}
77 };
78
79 static driver_t acpi_acad_driver = {
80 "acpi_acad",
81 acpi_acad_methods,
82 sizeof(struct acpi_acad_softc),
83 };
84
85 static devclass_t acpi_acad_devclass;
86 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
87 MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
88
89 ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
90
91 SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
92
93 static void
94 acpi_acad_get_status(void *context)
95 {
96 struct acpi_acad_softc *sc;
97 device_t dev;
98 ACPI_HANDLE h;
99 int newstatus;
100
101 dev = context;
102 sc = device_get_softc(dev);
103 h = acpi_get_handle(dev);
104 newstatus = -1;
105 acpi_GetInteger(h, "_PSR", &newstatus);
106
107 /* If status is valid and has changed, notify the system. */
108 ACPI_SERIAL_BEGIN(acad);
109 if (newstatus != -1 && sc->status != newstatus) {
110 sc->status = newstatus;
111 power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
112 POWER_PROFILE_ECONOMY);
113 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
114 "%s Line\n", newstatus ? "On" : "Off");
115 acpi_UserNotify("ACAD", h, newstatus);
116 }
117 ACPI_SERIAL_END(acad);
118 }
119
120 static void
121 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
122 {
123 device_t dev;
124
125 dev = (device_t)context;
126 switch (notify) {
127 case ACPI_NOTIFY_BUS_CHECK:
128 case ACPI_NOTIFY_DEVICE_CHECK:
129 case ACPI_POWERSOURCE_STAT_CHANGE:
130 /* Temporarily. It is better to notify policy manager */
131 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
132 break;
133 default:
134 device_printf(dev, "unknown notify %#x\n", notify);
135 break;
136 }
137 }
138
139 static int
140 acpi_acad_probe(device_t dev)
141 {
142 static char *acad_ids[] = { "ACPI0003", NULL };
143
144 if (acpi_disabled("acad") ||
145 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
146 return (ENXIO);
147
148 device_set_desc(dev, "AC Adapter");
149 return (0);
150 }
151
152 static int
153 acpi_acad_attach(device_t dev)
154 {
155 struct acpi_acad_softc *sc;
156 struct acpi_softc *acpi_sc;
157 ACPI_HANDLE handle;
158 int error;
159
160 sc = device_get_softc(dev);
161 handle = acpi_get_handle(dev);
162
163 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
164 if (error != 0)
165 return (error);
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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