acpi_acad.c revision 128071 
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 128071 2004-04-09 18:14:32Z 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);
86MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
87
88static void
89acpi_acad_get_status(void *context)
90{
91    struct acpi_acad_softc *sc;
92    device_t	dev;
93    ACPI_HANDLE	h;
94    int		newstatus;
95
96    dev = context;
97    sc = device_get_softc(dev);
98    h = acpi_get_handle(dev);
99    if (ACPI_FAILURE(acpi_GetInteger(h, "_PSR", &newstatus))) {
100	sc->status = -1;
101	return;
102    }
103
104    if (sc->status != newstatus) {
105	sc->status = newstatus;
106
107	/* Set system power profile based on AC adapter status */
108	power_profile_set_state(sc->status ? POWER_PROFILE_PERFORMANCE :
109				POWER_PROFILE_ECONOMY);
110	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
111		    "%s Line\n", sc->status ? "On" : "Off");
112
113	acpi_UserNotify("ACAD", h, sc->status);
114    }
115}
116
117static void
118acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
119{
120    device_t dev = context;
121
122    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
123		"Notify 0x%x\n", notify);
124
125    switch (notify) {
126    case ACPI_DEVICE_CHECK_PNP:
127    case ACPI_DEVICE_CHECK_EXISTENCE:
128    case ACPI_POWERSOURCE_STAT_CHANGE:
129	/* Temporarily.  It is better to notify policy manager */
130	AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context);
131	break;
132    default:
133	break;
134    }
135}
136
137static int
138acpi_acad_probe(device_t dev)
139{
140    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE &&
141	acpi_MatchHid(dev, "ACPI0003")) {
142
143	device_set_desc(dev, "AC Adapter");
144	return (0);
145    }
146    return (ENXIO);
147}
148
149static int
150acpi_acad_attach(device_t dev)
151{
152    struct acpi_acad_softc *sc;
153    struct acpi_softc	   *acpi_sc;
154    ACPI_HANDLE	handle;
155    int		error;
156
157    sc = device_get_softc(dev);
158    if (sc == NULL)
159	return (ENXIO);
160    handle = acpi_get_handle(dev);
161
162    error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
163    if (error != 0)
164	return (error);
165
166    if (device_get_unit(dev) == 0) {
167	acpi_sc = acpi_device_get_parent_softc(dev);
168	SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
169			SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
170			OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
171			&sc->status, 0, acpi_acad_sysctl, "I", "");
172    }
173
174    /* Get initial status after whole system is up. */
175    sc->status = -1;
176    sc->initializing = 0;
177
178    /*
179     * Also install a system notify handler even though this is not
180     * required by the specification.  The Casio FIVA needs this.
181     */
182    AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
183			     acpi_acad_notify_handler, dev);
184    AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
185			     acpi_acad_notify_handler, dev);
186    AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
187
188    return (0);
189}
190
191static int
192acpi_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    if (sc == NULL)
200	return (ENXIO);
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
218static int
219acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
220{
221    int val, error;
222
223    if (acpi_acad_get_acline(&val) != 0)
224	return (ENXIO);
225
226    val = *(u_int *)oidp->oid_arg1;
227    error = sysctl_handle_int(oidp, &val, 0, req);
228    return (error);
229}
230
231static void
232acpi_acad_init_acline(void *arg)
233{
234    struct acpi_acad_softc *sc;
235    device_t	dev;
236    int		retry, status;
237
238    dev = (device_t)arg;
239    sc = device_get_softc(dev);
240    if (sc->initializing)
241	return;
242
243    sc->initializing = 1;
244    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
245		"acline initialization start\n");
246
247    status = 0;
248    for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
249	acpi_acad_get_status(dev);
250	if (status != sc->status)
251	    break;
252	AcpiOsSleep(10, 0);
253    }
254
255    sc->initializing = 0;
256    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
257		"acline initialization done, tried %d times\n", retry + 1);
258}
259
260/*
261 * Public interfaces.
262 */
263int
264acpi_acad_get_acline(int *status)
265{
266    struct acpi_acad_softc *sc;
267    device_t dev;
268
269    dev = devclass_get_device(acpi_acad_devclass, 0);
270    if (dev == NULL)
271	return (ENXIO);
272    sc = device_get_softc(dev);
273    if (sc == NULL)
274	return (ENXIO);
275
276    acpi_acad_get_status(dev);
277    *status = sc->status;
278
279    return (0);
280}
281