acpi_acad.c revision 129692 
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 129692 2004-05-25 02:47:35Z 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 <sys/rman.h>
36#include <sys/ioccom.h>
37#include <sys/malloc.h>
38#include <sys/conf.h>
39#include <sys/power.h>
40
41#include "acpi.h"
42#include <dev/acpica/acpivar.h>
43#include <dev/acpica/acpiio.h>
44
45/* Hooks for the ACPI CA debugging infrastructure */
46#define _COMPONENT	ACPI_AC_ADAPTER
47ACPI_MODULE_NAME("AC_ADAPTER")
48
49/* Number of times to retry initialization before giving up. */
50#define ACPI_ACAD_RETRY_MAX		6
51
52#define ACPI_DEVICE_CHECK_PNP		0x00
53#define ACPI_DEVICE_CHECK_EXISTENCE	0x01
54#define ACPI_POWERSOURCE_STAT_CHANGE	0x80
55
56struct	acpi_acad_softc {
57    int status;
58    int initializing;
59};
60
61static void	acpi_acad_get_status(void *);
62static void	acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
63static int	acpi_acad_probe(device_t);
64static int	acpi_acad_attach(device_t);
65static int	acpi_acad_ioctl(u_long, caddr_t, void *);
66static int	acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
67static void	acpi_acad_init_acline(void *arg);
68
69static device_method_t acpi_acad_methods[] = {
70    /* Device interface */
71    DEVMETHOD(device_probe,	acpi_acad_probe),
72    DEVMETHOD(device_attach,	acpi_acad_attach),
73
74    {0, 0}
75};
76
77static driver_t acpi_acad_driver = {
78    "acpi_acad",
79    acpi_acad_methods,
80    sizeof(struct acpi_acad_softc),
81};
82
83static devclass_t acpi_acad_devclass;
84DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
85MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
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_GetInteger(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	acpi_UserNotify("ACAD", h, sc->status);
113    }
114}
115
116static void
117acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
118{
119    device_t dev;
120
121    dev = (device_t)context;
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	device_printf(dev, "unknown notify %#x\n", notify);
131	break;
132    }
133}
134
135static int
136acpi_acad_probe(device_t dev)
137{
138    if (acpi_get_type(dev) == ACPI_TYPE_DEVICE && !acpi_disabled("acad") &&
139	acpi_MatchHid(dev, "ACPI0003")) {
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    /*
176     * Also install a system notify handler even though this is not
177     * required by the specification.  The Casio FIVA needs this.
178     */
179    AcpiInstallNotifyHandler(handle, ACPI_SYSTEM_NOTIFY,
180			     acpi_acad_notify_handler, dev);
181    AcpiInstallNotifyHandler(handle, ACPI_DEVICE_NOTIFY,
182			     acpi_acad_notify_handler, dev);
183    AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
184
185    return (0);
186}
187
188static int
189acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
190{
191    struct acpi_acad_softc *sc;
192    device_t dev;
193
194    dev = (device_t)arg;
195    sc = device_get_softc(dev);
196    if (sc == NULL)
197	return (ENXIO);
198
199    /*
200     * No security check required: information retrieval only.  If
201     * new functions are added here, a check might be required.
202     */
203    switch (cmd) {
204    case ACPIIO_ACAD_GET_STATUS:
205	acpi_acad_get_status(dev);
206	*(int *)addr = sc->status;
207	break;
208    default:
209	break;
210    }
211
212    return (0);
213}
214
215static int
216acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
217{
218    int val, error;
219
220    if (acpi_acad_get_acline(&val) != 0)
221	return (ENXIO);
222
223    val = *(u_int *)oidp->oid_arg1;
224    error = sysctl_handle_int(oidp, &val, 0, req);
225    return (error);
226}
227
228static void
229acpi_acad_init_acline(void *arg)
230{
231    struct acpi_acad_softc *sc;
232    device_t	dev;
233    int		retry, status;
234
235    dev = (device_t)arg;
236    sc = device_get_softc(dev);
237    if (sc->initializing)
238	return;
239
240    sc->initializing = 1;
241    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
242		"acline initialization start\n");
243
244    status = 0;
245    for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
246	acpi_acad_get_status(dev);
247	if (status != sc->status)
248	    break;
249	AcpiOsSleep(10, 0);
250    }
251
252    sc->initializing = 0;
253    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
254		"acline initialization done, tried %d times\n", retry + 1);
255}
256
257/*
258 * Public interfaces.
259 */
260int
261acpi_acad_get_acline(int *status)
262{
263    struct acpi_acad_softc *sc;
264    device_t dev;
265
266    dev = devclass_get_device(acpi_acad_devclass, 0);
267    if (dev == NULL)
268	return (ENXIO);
269    sc = device_get_softc(dev);
270    if (sc == NULL)
271	return (ENXIO);
272
273    acpi_acad_get_status(dev);
274    *status = sc->status;
275
276    return (0);
277}
278