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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include "opt_acpi.h"
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/bus.h>
34
35#include <machine/bus.h>
36#include <sys/rman.h>
37#include <sys/ioccom.h>
38#include <sys/malloc.h>
39#include <sys/module.h>
40#include <sys/conf.h>
41#include <sys/power.h>
42
43#include <contrib/dev/acpica/include/acpi.h>
44
45#include <dev/acpica/acpivar.h>
46#include <dev/acpica/acpiio.h>
47#include <isa/isavar.h>
48#include <isa/pnpvar.h>
49
50/* Hooks for the ACPI CA debugging infrastructure */
51#define _COMPONENT	ACPI_AC_ADAPTER
52ACPI_MODULE_NAME("AC_ADAPTER")
53
54/* Number of times to retry initialization before giving up. */
55#define ACPI_ACAD_RETRY_MAX		6
56
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);
70static void	acpi_acad_ac_only(void *arg);
71
72static device_method_t acpi_acad_methods[] = {
73    /* Device interface */
74    DEVMETHOD(device_probe,	acpi_acad_probe),
75    DEVMETHOD(device_attach,	acpi_acad_attach),
76
77    {0, 0}
78};
79
80static driver_t acpi_acad_driver = {
81    "acpi_acad",
82    acpi_acad_methods,
83    sizeof(struct acpi_acad_softc),
84};
85
86static devclass_t acpi_acad_devclass;
87DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
88MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
89
90ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
91
92SYSINIT(acad, SI_SUB_KTHREAD_IDLE, SI_ORDER_FIRST, acpi_acad_ac_only, NULL);
93
94static void
95acpi_acad_get_status(void *context)
96{
97    struct acpi_acad_softc *sc;
98    device_t	dev;
99    ACPI_HANDLE	h;
100    int		newstatus;
101
102    dev = context;
103    sc = device_get_softc(dev);
104    h = acpi_get_handle(dev);
105    newstatus = -1;
106    acpi_GetInteger(h, "_PSR", &newstatus);
107
108    /* If status is valid and has changed, notify the system. */
109    ACPI_SERIAL_BEGIN(acad);
110    if (newstatus != -1 && sc->status != newstatus) {
111	sc->status = newstatus;
112	ACPI_SERIAL_END(acad);
113	power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
114	    POWER_PROFILE_ECONOMY);
115	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
116	    "%s Line\n", newstatus ? "On" : "Off");
117	acpi_UserNotify("ACAD", h, newstatus);
118    } else
119	ACPI_SERIAL_END(acad);
120}
121
122static void
123acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
124{
125    device_t dev;
126
127    dev = (device_t)context;
128    switch (notify) {
129    case ACPI_NOTIFY_BUS_CHECK:
130    case ACPI_NOTIFY_DEVICE_CHECK:
131    case ACPI_POWERSOURCE_STAT_CHANGE:
132	/* Temporarily.  It is better to notify policy manager */
133	AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_acad_get_status, context);
134	break;
135    default:
136	device_printf(dev, "unknown notify %#x\n", notify);
137	break;
138    }
139}
140
141static int
142acpi_acad_probe(device_t dev)
143{
144    static char *acad_ids[] = { "ACPI0003", NULL };
145
146    if (acpi_disabled("acad") ||
147	ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
148	return (ENXIO);
149
150    device_set_desc(dev, "AC Adapter");
151    return (0);
152}
153
154static int
155acpi_acad_attach(device_t dev)
156{
157    struct acpi_acad_softc *sc;
158    struct acpi_softc	   *acpi_sc;
159    ACPI_HANDLE	handle;
160    int		error;
161
162    sc = device_get_softc(dev);
163    handle = acpi_get_handle(dev);
164
165    error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
166    if (error != 0)
167	return (error);
168
169    if (device_get_unit(dev) == 0) {
170	acpi_sc = acpi_device_get_parent_softc(dev);
171	SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
172			SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
173			OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
174			&sc->status, 0, acpi_acad_sysctl, "I", "");
175    }
176
177    /* Get initial status after whole system is up. */
178    sc->status = -1;
179
180    /*
181     * Install both system and device notify handlers since the Casio
182     * FIVA needs them.
183     */
184    AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
185			     acpi_acad_notify_handler, dev);
186    AcpiOsExecute(OSL_NOTIFY_HANDLER, 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
200    /*
201     * No security check required: information retrieval only.  If
202     * new functions are added here, a check might be required.
203     */
204    switch (cmd) {
205    case ACPIIO_ACAD_GET_STATUS:
206	acpi_acad_get_status(dev);
207	*(int *)addr = sc->status;
208	break;
209    default:
210	break;
211    }
212
213    return (0);
214}
215
216static int
217acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
218{
219    int val, error;
220
221    if (acpi_acad_get_acline(&val) != 0)
222	return (ENXIO);
223
224    val = *(u_int *)oidp->oid_arg1;
225    error = sysctl_handle_int(oidp, &val, 0, req);
226    return (error);
227}
228
229static void
230acpi_acad_init_acline(void *arg)
231{
232    struct acpi_acad_softc *sc;
233    device_t	dev;
234    int		retry;
235
236    dev = (device_t)arg;
237    sc = device_get_softc(dev);
238    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
239		"acline initialization start\n");
240
241    for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
242	acpi_acad_get_status(dev);
243	if (sc->status != -1)
244	    break;
245	AcpiOsSleep(10000);
246    }
247
248    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
249		"acline initialization done, tried %d times\n", retry + 1);
250}
251
252/*
253 * If no AC line devices detected after boot, create an "online" event
254 * so that userland code can adjust power settings accordingly.  The default
255 * power profile is "performance" so we don't need to repeat that here.
256 */
257static void
258acpi_acad_ac_only(void __unused *arg)
259{
260
261    if (devclass_get_count(acpi_acad_devclass) == 0)
262	acpi_UserNotify("ACAD", ACPI_ROOT_OBJECT, 1);
263}
264
265/*
266 * Public interfaces.
267 */
268int
269acpi_acad_get_acline(int *status)
270{
271    struct acpi_acad_softc *sc;
272    device_t dev;
273
274    dev = devclass_get_device(acpi_acad_devclass, 0);
275    if (dev == NULL)
276	return (ENXIO);
277    sc = device_get_softc(dev);
278
279    acpi_acad_get_status(dev);
280    *status = sc->status;
281
282    return (0);
283}
284