FreeBSD-5.3/sys/dev/acpica/acpi_acad.c
/*-
* Copyright (c) 2000 Takanori Watanabe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/sys/dev/acpica/acpi_acad.c,v 1.31 2004/08/13 17:47:40 njl Exp $
*/
#include "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/ioccom.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/conf.h>
#include <sys/power.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
#include <isa/isavar.h>
#include <isa/pnpvar.h>
/* Hooks for the ACPI CA debugging infrastructure */
#define _COMPONENT ACPI_AC_ADAPTER
ACPI_MODULE_NAME("AC_ADAPTER")
/* Number of times to retry initialization before giving up. */
#define ACPI_ACAD_RETRY_MAX 6
#define ACPI_DEVICE_CHECK_PNP 0x00
#define ACPI_DEVICE_CHECK_EXISTENCE 0x01
#define ACPI_POWERSOURCE_STAT_CHANGE 0x80
struct acpi_acad_softc {
int status;
};
static void acpi_acad_get_status(void *);
static void acpi_acad_notify_handler(ACPI_HANDLE, UINT32, void *);
static int acpi_acad_probe(device_t);
static int acpi_acad_attach(device_t);
static int acpi_acad_ioctl(u_long, caddr_t, void *);
static int acpi_acad_sysctl(SYSCTL_HANDLER_ARGS);
static void acpi_acad_init_acline(void *arg);
static device_method_t acpi_acad_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_acad_probe),
DEVMETHOD(device_attach, acpi_acad_attach),
{0, 0}
};
static driver_t acpi_acad_driver = {
"acpi_acad",
acpi_acad_methods,
sizeof(struct acpi_acad_softc),
};
static devclass_t acpi_acad_devclass;
DRIVER_MODULE(acpi_acad, acpi, acpi_acad_driver, acpi_acad_devclass, 0, 0);
MODULE_DEPEND(acpi_acad, acpi, 1, 1, 1);
ACPI_SERIAL_DECL(acad, "ACPI AC adapter");
static void
acpi_acad_get_status(void *context)
{
struct acpi_acad_softc *sc;
device_t dev;
ACPI_HANDLE h;
int newstatus;
dev = context;
sc = device_get_softc(dev);
h = acpi_get_handle(dev);
newstatus = -1;
acpi_GetInteger(h, "_PSR", &newstatus);
/* If status is valid and has changed, notify the system. */
ACPI_SERIAL_BEGIN(acad);
if (newstatus != -1 && sc->status != newstatus) {
sc->status = newstatus;
power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
POWER_PROFILE_ECONOMY);
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"%s Line\n", newstatus ? "On" : "Off");
acpi_UserNotify("ACAD", h, newstatus);
}
ACPI_SERIAL_END(acad);
}
static void
acpi_acad_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
{
device_t dev;
dev = (device_t)context;
switch (notify) {
case ACPI_DEVICE_CHECK_PNP:
case ACPI_DEVICE_CHECK_EXISTENCE:
case ACPI_POWERSOURCE_STAT_CHANGE:
/* Temporarily. It is better to notify policy manager */
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_get_status, context);
break;
default:
device_printf(dev, "unknown notify %#x\n", notify);
break;
}
}
static int
acpi_acad_probe(device_t dev)
{
static char *acad_ids[] = { "ACPI0003", NULL };
if (acpi_disabled("acad") ||
ACPI_ID_PROBE(device_get_parent(dev), dev, acad_ids) == NULL)
return (ENXIO);
device_set_desc(dev, "AC Adapter");
return (0);
}
static int
acpi_acad_attach(device_t dev)
{
struct acpi_acad_softc *sc;
struct acpi_softc *acpi_sc;
ACPI_HANDLE handle;
int error;
sc = device_get_softc(dev);
handle = acpi_get_handle(dev);
error = acpi_register_ioctl(ACPIIO_ACAD_GET_STATUS, acpi_acad_ioctl, dev);
if (error != 0)
return (error);
if (device_get_unit(dev) == 0) {
acpi_sc = acpi_device_get_parent_softc(dev);
SYSCTL_ADD_PROC(&acpi_sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),
OID_AUTO, "acline", CTLTYPE_INT | CTLFLAG_RD,
&sc->status, 0, acpi_acad_sysctl, "I", "");
}
/* Get initial status after whole system is up. */
sc->status = -1;
/*
* Install both system and device notify handlers since the Casio
* FIVA needs them.
*/
AcpiInstallNotifyHandler(handle, ACPI_ALL_NOTIFY,
acpi_acad_notify_handler, dev);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpi_acad_init_acline, dev);
return (0);
}
static int
acpi_acad_ioctl(u_long cmd, caddr_t addr, void *arg)
{
struct acpi_acad_softc *sc;
device_t dev;
dev = (device_t)arg;
sc = device_get_softc(dev);
/*
* No security check required: information retrieval only. If
* new functions are added here, a check might be required.
*/
switch (cmd) {
case ACPIIO_ACAD_GET_STATUS:
acpi_acad_get_status(dev);
*(int *)addr = sc->status;
break;
default:
break;
}
return (0);
}
static int
acpi_acad_sysctl(SYSCTL_HANDLER_ARGS)
{
int val, error;
if (acpi_acad_get_acline(&val) != 0)
return (ENXIO);
val = *(u_int *)oidp->oid_arg1;
error = sysctl_handle_int(oidp, &val, 0, req);
return (error);
}
static void
acpi_acad_init_acline(void *arg)
{
struct acpi_acad_softc *sc;
device_t dev;
int retry;
dev = (device_t)arg;
sc = device_get_softc(dev);
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"acline initialization start\n");
for (retry = 0; retry < ACPI_ACAD_RETRY_MAX; retry++) {
acpi_acad_get_status(dev);
if (sc->status != -1)
break;
AcpiOsSleep(10, 0);
}
ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
"acline initialization done, tried %d times\n", retry + 1);
}
/*
* Public interfaces.
*/
int
acpi_acad_get_acline(int *status)
{
struct acpi_acad_softc *sc;
device_t dev;
dev = devclass_get_device(acpi_acad_devclass, 0);
if (dev == NULL)
return (ENXIO);
sc = device_get_softc(dev);
acpi_acad_get_status(dev);
*status = sc->status;
return (0);
}