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: releng/9.2/sys/dev/acpica/acpi_acad.c 197649 2009-09-30 17:07:49Z jhb $");
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/include/acpi.h>
44
45 #include <dev/acpica/acpivar.h>
46 #include <dev/acpica/acpiio.h>
47 #include <isa/isavar.h>
48 #include <isa/pnpvar.h>
49
50 /* Hooks for the ACPI CA debugging infrastructure */
51 #define _COMPONENT ACPI_AC_ADAPTER
52 ACPI_MODULE_NAME("AC_ADAPTER")
53
54 /* Number of times to retry initialization before giving up. */
55 #define ACPI_ACAD_RETRY_MAX 6
56
57 #define ACPI_POWERSOURCE_STAT_CHANGE 0x80
58
59 struct acpi_acad_softc {
60 int status;
61 };
62
63 static void acpi_acad_get_status(void *);
64 static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
65 static int acpi_acad_probe(device_t);
66 static int acpi_acad_attach(device_t);
67 static int acpi_acad_ioctl(u_long, caddr_t, void *);
68 static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
69 static void acpi_acad_init_acline(void *arg);
70 static void acpi_acad_ac_only(void *arg);
71
72 static device_method_t acpi_acad_methods[] = {
73 /* Device interface */
74 DEVMETHOD(device_probe, acpi_acad_probe),
75 DEVMETHOD(device_attach, acpi_acad_attach),
76
77 {0, 0}
78 };
79
80 static driver_t acpi_acad_driver = {
81 "acpi_acad",
82 acpi_acad_methods,
83 sizeof(struct acpi_acad_softc),
84 };
85
86 static devclass_t acpi_acad_devclass;
87 DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 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 } else
119 ACPI_SERIAL_END(acad);
120 }
121
122 static void
123 acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
124 {
125 device_t dev;
126
127 dev = (device_t)context;
128 switch (notify) {
129 case ACPI_NOTIFY_BUS_CHECK:
130 case ACPI_NOTIFY_DEVICE_CHECK:
131 case ACPI_POWERSOURCE_STAT_CHANGE:
132 /* Temporarily. It is better to notify policy manager */
133 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
134 break;
135 default:
136 device_printf(dev, "unknown notify %#x\n", notify);
137 break;
138 }
139 }
140
141 static int
142 acpi_acad_probe(device_t dev)
143 {
144 static char *acad_ids[] = { "ACPI0003", NULL };
145
146 if (acpi_disabled("acad") ||
147 ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
148 return (ENXIO);
149
150 device_set_desc(dev, "AC Adapter");
151 return (0);
152 }
153
154 static int
155 acpi_acad_attach(device_t dev)
156 {
157 struct acpi_acad_softc *sc;
158 struct acpi_softc *acpi_sc;
159 ACPI_HANDLE handle;
160 int error;
161
162 sc = device_get_softc(dev);
163 handle = acpi_get_handle(dev);
164
165 error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
166 if (error != 0)
167 return (error);
168
169 if (device_get_unit(dev) == 0) {
170 acpi_sc = acpi_device_get_parent_softc(dev);
171 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
172 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
173 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
174 &sc->status, 0, acpi_acad_sysctl, "I", "");
175 }
176
177 /* Get initial status after whole system is up. */
178 sc->status = -1;
179
180 /*
181 * Install both system and device notify handlers since the Casio
182 * FIVA needs them.
183 */
184 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
185 acpi_acad_notify_handler, dev);
186 AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_init_acline, dev);
187
188 return (0);
189 }
190
191 static int
192 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
193 {
194 struct acpi_acad_softc *sc;
195 device_t dev;
196
197 dev = (device_t)arg;
198 sc = device_get_softc(dev);
199
200 /*
201 * No security check required: information retrieval only. If
202 * new functions are added here, a check might be required.
203 */
204 switch (cmd) {
205 case ACPIIO_ACAD_GET_STATUS:
206 acpi_acad_get_status(dev);
207 *(int *)addr = sc->status;
208 break;
209 default:
210 break;
211 }
212
213 return (0);
214 }
215
216 static int
217 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
218 {
219 int val, error;
220
221 if (acpi_acad_get_acline(&val) != 0)
222 return (ENXIO);
223
224 val = *(u_int *)oidp->oid_arg1;
225 error = sysctl_handle_int(oidp, &val, 0, req);
226 return (error);
227 }
228
229 static void
230 acpi_acad_init_acline(void *arg)
231 {
232 struct acpi_acad_softc *sc;
233 device_t dev;
234 int retry;
235
236 dev = (device_t)arg;
237 sc = device_get_softc(dev);
238 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
239 "acline initialization start\n");
240
241 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
242 acpi_acad_get_status(dev);
243 if (sc->status != -1)
244 break;
245 AcpiOsSleep(10000);
246 }
247
248 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
249 "acline initialization done, tried %d times\n", retry + 1);
250 }
251
252 /*
253 * If no AC line devices detected after boot, create an "online" event
254 * so that userland code can adjust power settings accordingly. The default
255 * power profile is "performance" so we don't need to repeat that here.
256 */
257 static void
258 acpi_acad_ac_only(void __unused *arg)
259 {
260
261 if (devclass_get_count(acpi_acad_devclass) == 0)
262 acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
263 }
264
265 /*
266 * Public interfaces.
267 */
268 int
269 acpi_acad_get_acline(int *status)
270 {
271 struct acpi_acad_softc *sc;
272 device_t dev;
273
274 dev = devclass_get_device(acpi_acad_devclass, 0);
275 if (dev == NULL)
276 return (ENXIO);
277 sc = device_get_softc(dev);
278
279 acpi_acad_get_status(dev);
280 *status = sc->status;
281
282 return (0);
283 }
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