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: releng/5.4/sys/dev/acpica/acpi_acad.c 139032 2004-12-19 04:17:49Z marks $
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 <machine/bus.h>
35 #include <sys/rman.h>
36 #include <sys/ioccom.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
39 #include <sys/conf.h>
40 #include <sys/power.h>
41
42 #include "acpi.h"
43 #include <dev/acpica/acpivar.h>
44 #include <dev/acpica/acpiio.h>
45 #include <isa/isavar.h>
46 #include <isa/pnpvar.h>
47
48 /* Hooks for the ACPI CA debugging infrastructure */
49 #define _COMPONENT ACPI_AC_ADAPTER
50 ACPI_MODULE_NAME("AC_ADAPTER")
51
52 /* Number of times to retry initialization before giving up. */
53 #define ACPI_ACAD_RETRY_MAX 6
54
55 #define ACPI_DEVICE_CHECK_PNP 0x00
56 #define ACPI_DEVICE_CHECK_EXISTENCE 0x01
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
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 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_DEVICE_CHECK_PNP:
126 case ACPI_DEVICE_CHECK_EXISTENCE:
127 case ACPI_POWERSOURCE_STAT_CHANGE:
128 /* Temporarily. It is better to notify policy manager */
129 AcpiOsQueueForExecution(OSD_PRIORITY_LO, 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 if (device_get_unit(dev) == 0) {
166 acpi_sc = acpi_device_get_parent_softc(dev);
167 SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
168 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
169 OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
170 &sc->status, 0, acpi_acad_sysctl, "I", "");
171 }
172
173 /* Get initial status after whole system is up. */
174 sc->status = -1;
175
176 /*
177 * Install both system and device notify handlers since the Casio
178 * FIVA needs them.
179 */
180 AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
181 acpi_acad_notify_handler, dev);
182 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
183
184 return (0);
185 }
186
187 static int
188 acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
189 {
190 struct acpi_acad_softc *sc;
191 device_t dev;
192
193 dev = (device_t)arg;
194 sc = device_get_softc(dev);
195
196 /*
197 * No security check required: information retrieval only. If
198 * new functions are added here, a check might be required.
199 */
200 switch (cmd) {
201 case ACPIIO_ACAD_GET_STATUS:
202 acpi_acad_get_status(dev);
203 *(int *)addr = sc->status;
204 break;
205 default:
206 break;
207 }
208
209 return (0);
210 }
211
212 static int
213 acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
214 {
215 int val, error;
216
217 if (acpi_acad_get_acline(&val) != 0)
218 return (ENXIO);
219
220 val = *(u_int *)oidp->oid_arg1;
221 error = sysctl_handle_int(oidp, &val, 0, req);
222 return (error);
223 }
224
225 static void
226 acpi_acad_init_acline(void *arg)
227 {
228 struct acpi_acad_softc *sc;
229 device_t dev;
230 int retry;
231
232 dev = (device_t)arg;
233 sc = device_get_softc(dev);
234 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
235 "acline initialization start\n");
236
237 for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
238 acpi_acad_get_status(dev);
239 if (sc->status != -1)
240 break;
241 AcpiOsSleep(10000);
242 }
243
244 ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
245 "acline initialization done, tried %d times\n", retry + 1);
246 }
247
248 /*
249 * Public interfaces.
250 */
251 int
252 acpi_acad_get_acline(int *status)
253 {
254 struct acpi_acad_softc *sc;
255 device_t dev;
256
257 dev = devclass_get_device(acpi_acad_devclass, 0);
258 if (dev == NULL)
259 return (ENXIO);
260 sc = device_get_softc(dev);
261
262 acpi_acad_get_status(dev);
263 *status = sc->status;
264
265 return (0);
266 }
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