acpi_acad.c revision 138300 
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 138300 2004-12-02 00:25:35Z 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
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_DEVICE_CHECK_PNP		0x00
56#define ACPI_DEVICE_CHECK_EXISTENCE	0x01
57#define ACPI_POWERSOURCE_STAT_CHANGE	0x80
58
59struct	acpi_acad_softc {
60    int status;
61};
62
63static void	acpi_acad_get_status(void *);
64static void	acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
65static int	acpi_acad_probe(device_t);
66static int	acpi_acad_attach(device_t);
67static int	acpi_acad_ioctl(u_long, caddr_t, void *);
68static int	acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
69static void	acpi_acad_init_acline(void *arg);
70
71static 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
79static driver_t acpi_acad_driver = {
80    "acpi_acad",
81    acpi_acad_methods,
82    sizeof(struct acpi_acad_softc),
83};
84
85static devclass_t acpi_acad_devclass;
86DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
87MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
88
89ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
90
91static void
92acpi_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
118static void
119acpi_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
137static int
138acpi_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
150static int
151acpi_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
187static int
188acpi_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
212static int
213acpi_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
225static void
226acpi_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 */
251int
252acpi_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}
267