acpi_acad.c revision 118925 
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: head/sys/dev/acpica/acpi_acad.c 118925 2003-08-15 02:17:23Z njl $
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 <machine/resource.h>
36#include <sys/rman.h>
37#include <sys/ioccom.h>
38#include <sys/malloc.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
46/* Hooks for the ACPI CA debugging infrastructure */
47#define _COMPONENT	ACPI_AC_ADAPTER
48ACPI_MODULE_NAME("AC_ADAPTER")
49
50/* Number of times to retry initialization before giving up. */
51#define ACPI_ACAD_RETRY_MAX		6
52
53#define ACPI_DEVICE_CHECK_PNP		0x00
54#define ACPI_DEVICE_CHECK_EXISTENCE	0x01
55#define ACPI_POWERSOURCE_STAT_CHANGE	0x80
56
57struct	acpi_acad_softc {
58    int status;
59    int initializing;
60};
61
62static void	acpi_acad_get_status(void *);
63static void	acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
64static int	acpi_acad_probe(device_t);
65static int	acpi_acad_attach(device_t);
66static int	acpi_acad_ioctl(u_long, caddr_t, void *);
67static int	acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
68static void	acpi_acad_init_acline(void *arg);
69
70static device_method_t acpi_acad_methods[] = {
71    /* Device interface */
72    DEVMETHOD(device_probe,	acpi_acad_probe),
73    DEVMETHOD(device_attach,	acpi_acad_attach),
74
75    {0, 0}
76};
77
78static driver_t acpi_acad_driver = {
79    "acpi_acad",
80    acpi_acad_methods,
81    sizeof(struct acpi_acad_softc),
82};
83
84static devclass_t acpi_acad_devclass;
85DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
86
87static void
88acpi_acad_get_status(void *context)
89{
90    struct acpi_acad_softc *sc;
91    device_t	dev;
92    ACPI_HANDLE	h;
93    int		newstatus;
94
95    dev = context;
96    sc = device_get_softc(dev);
97    h = acpi_get_handle(dev);
98    if (ACPI_FAILURE(acpi_EvaluateInteger(h, "_PSR", &newstatus))) {
99	sc->status = -1;
100	return;
101    }
102
103    if (sc->status != newstatus) {
104	sc->status = newstatus;
105
106	/* Set system power profile based on AC adapter status */
107	power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE :
108				POWER_PROFILE_ECONOMY);
109	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
110		    "%s Line\n", sc->status ? "On" : "Off");
111    }
112}
113
114static void
115acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
116{
117    device_t dev = context;
118
119    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
120		"Notify %d\n", notify);
121
122    switch (notify) {
123    case ACPI_DEVICE_CHECK_PNP:
124    case ACPI_DEVICE_CHECK_EXISTENCE:
125    case ACPI_POWERSOURCE_STAT_CHANGE:
126	/* Temporarily.  It is better to notify policy manager */
127	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context);
128	break;
129    default:
130	break;
131    }
132}
133
134static int
135acpi_acad_probe(device_t dev)
136{
137    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE &&
138	acpi_MatchHid(dev, "ACPI0003")) {
139
140	device_set_desc(dev, "AC adapter");
141	return (0);
142    }
143    return (ENXIO);
144}
145
146static int
147acpi_acad_attach(device_t dev)
148{
149    struct acpi_acad_softc *sc;
150    struct acpi_softc	   *acpi_sc;
151    ACPI_HANDLE	handle;
152    int		error;
153
154    sc = device_get_softc(dev);
155    if (sc == NULL)
156	return (ENXIO);
157    handle = acpi_get_handle(dev);
158
159    error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
160    if (error != 0)
161	return (error);
162
163    if (device_get_unit(dev) == 0) {
164	acpi_sc = acpi_device_get_parent_softc(dev);
165	SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
166			SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
167			OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
168			&sc->status, 0, acpi_acad_sysctl, "I", "");
169    }
170
171    /* Get initial status after whole system is up. */
172    sc->status = -1;
173    sc->initializing = 0;
174
175    AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
176			     acpi_acad_notify_handler, dev);
177    AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
178
179    return (0);
180}
181
182static int
183acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
184{
185    struct acpi_acad_softc *sc;
186    device_t dev;
187
188    dev = (device_t)arg;
189    sc = device_get_softc(dev);
190    if (sc == NULL)
191	return (ENXIO);
192
193    /*
194     * No security check required: information retrieval only.  If
195     * new functions are added here, a check might be required.
196     */
197    switch (cmd) {
198    case ACPIIO_ACAD_GET_STATUS:
199	acpi_acad_get_status(dev);
200	*(int *)addr = sc->status;
201	break;
202    default:
203	break;
204    }
205
206    return (0);
207}
208
209static int
210acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
211{
212    int val, error;
213
214    if (acpi_acad_get_acline(&val) != 0)
215	return (ENXIO);
216
217    val = *(u_int *)oidp->oid_arg1;
218    error = sysctl_handle_int(oidp, &val, 0, req);
219    return (error);
220}
221
222static void
223acpi_acad_init_acline(void *arg)
224{
225    struct acpi_acad_softc *sc;
226    device_t	dev;
227    int		retry, status;
228
229    dev = (device_t)arg;
230    sc = device_get_softc(dev);
231    if (sc->initializing)
232	return;
233
234    sc->initializing = 1;
235    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
236		"acline initialization start\n");
237
238    status = 0;
239    for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
240	acpi_acad_get_status(dev);
241	if (status != sc->status)
242	    break;
243	AcpiOsSleep(10, 0);
244    }
245
246    sc->initializing = 0;
247    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
248		"acline initialization done, tried %d times\n", retry + 1);
249}
250
251/*
252 * Public interfaces.
253 */
254int
255acpi_acad_get_acline(int *status)
256{
257    struct acpi_acad_softc *sc;
258    device_t dev;
259
260    dev = devclass_get_device(acpi_acad_devclass, 0);
261    if (dev == NULL)
262	return (ENXIO);
263    sc = device_get_softc(dev);
264    if (sc == NULL)
265	return (ENXIO);
266
267    acpi_acad_get_status(dev);
268    *status = sc->status;
269
270    return (0);
271}
272