acpi_acad.c revision 146373 
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 146373 2005-05-19 09:13:26Z takawata $
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
50ACPI_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_POWERSOURCE_STAT_CHANGE	0x80
56
57struct	acpi_acad_softc {
58    int status;
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
87ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
88
89static void
90acpi_acad_get_status(void *context)
91{
92    struct acpi_acad_softc *sc;
93    device_t	dev;
94    ACPI_HANDLE	h;
95    int		newstatus;
96
97    dev = context;
98    sc = device_get_softc(dev);
99    h = acpi_get_handle(dev);
100    newstatus = -1;
101    acpi_GetInteger(h, "_PSR", &newstatus);
102
103    /* If status is valid and has changed, notify the system. */
104    ACPI_SERIAL_BEGIN(acad);
105    if (newstatus != -1 && sc->status != newstatus) {
106	sc->status = newstatus;
107	power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
108	    POWER_PROFILE_ECONOMY);
109	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
110	    "%s Line\n", newstatus ? "On" : "Off");
111	acpi_UserNotify("ACAD", h, newstatus);
112    }
113    ACPI_SERIAL_END(acad);
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_NOTIFY_BUS_CHECK:
124    case ACPI_NOTIFY_DEVICE_CHECK:
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    static char *acad_ids[] = { "ACPI0003", NULL };
139
140    if (acpi_disabled("acad") ||
141	ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
142	return (ENXIO);
143
144    device_set_desc(dev, "AC Adapter");
145    return (0);
146}
147
148static int
149acpi_acad_attach(device_t dev)
150{
151    struct acpi_acad_softc *sc;
152    struct acpi_softc	   *acpi_sc;
153    ACPI_HANDLE	handle;
154    int		error;
155
156    sc = device_get_softc(dev);
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
174    /*
175     * Install both system and device notify handlers since the Casio
176     * FIVA needs them.
177     */
178    AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
179			     acpi_acad_notify_handler, dev);
180    AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
181
182    return (0);
183}
184
185static int
186acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
187{
188    struct acpi_acad_softc *sc;
189    device_t dev;
190
191    dev = (device_t)arg;
192    sc = device_get_softc(dev);
193
194    /*
195     * No security check required: information retrieval only.  If
196     * new functions are added here, a check might be required.
197     */
198    switch (cmd) {
199    case ACPIIO_ACAD_GET_STATUS:
200	acpi_acad_get_status(dev);
201	*(int *)addr = sc->status;
202	break;
203    default:
204	break;
205    }
206
207    return (0);
208}
209
210static int
211acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
212{
213    int val, error;
214
215    if (acpi_acad_get_acline(&val) != 0)
216	return (ENXIO);
217
218    val = *(u_int *)oidp->oid_arg1;
219    error = sysctl_handle_int(oidp, &val, 0, req);
220    return (error);
221}
222
223static void
224acpi_acad_init_acline(void *arg)
225{
226    struct acpi_acad_softc *sc;
227    device_t	dev;
228    int		retry;
229
230    dev = (device_t)arg;
231    sc = device_get_softc(dev);
232    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
233		"acline initialization start\n");
234
235    for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
236	acpi_acad_get_status(dev);
237	if (sc->status != -1)
238	    break;
239	AcpiOsSleep(10000);
240    }
241
242    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
243		"acline initialization done, tried %d times\n", retry + 1);
244}
245
246/*
247 * Public interfaces.
248 */
249int
250acpi_acad_get_acline(int *status)
251{
252    struct acpi_acad_softc *sc;
253    device_t dev;
254
255    dev = devclass_get_device(acpi_acad_devclass, 0);
256    if (dev == NULL)
257	return (ENXIO);
258    sc = device_get_softc(dev);
259
260    acpi_acad_get_status(dev);
261    *status = sc->status;
262
263    return (0);
264}
265