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NetBSD/sys/dev/acpi/acpi_bat.c

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/* $NetBSD: acpi_bat.c,v 1.14 2002/12/31 05:26:56 explorer Exp $ */
/*
* Copyright 2001 Bill Sommerfeld.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC
* 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.
*/
#if 0
#define ACPI_BAT_DEBUG
#endif
/*
* ACPI Battery Driver.
*
* ACPI defines two different battery device interfaces: "Control
* Method" batteries, in which AML methods are defined in order to get
* battery status and set battery alarm thresholds, and a "Smart
* Battery" device, which is an SMbus device accessed through the ACPI
* Embedded Controller device.
*
* This driver is for the "Control Method"-style battery only.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_bat.c,v 1.14 2002/12/31 05:26:56 explorer Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h> /* for hz */
#include <sys/device.h>
#include <sys/callout.h>
#include <dev/sysmon/sysmonvar.h>
#include <dev/acpi/acpica.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
/* sensor indexes */
#define ACPIBAT_DCAPACITY 0
#define ACPIBAT_LFCCAPACITY 1
#define ACPIBAT_TECHNOLOGY 2
#define ACPIBAT_DVOLTAGE 3
#define ACPIBAT_WCAPACITY 4
#define ACPIBAT_LCAPACITY 5
#define ACPIBAT_VOLTAGE 6
#define ACPIBAT_LOAD 7
#define ACPIBAT_CAPACITY 8
#define ACPIBAT_CHARGING 9
#define ACPIBAT_DISCHARGING 10
#define ACPIBAT_NSENSORS 11 /* number of sensors */
const struct envsys_range acpibat_range_amp[] = {
{ 0, 1, ENVSYS_SVOLTS_DC },
{ 1, 2, ENVSYS_SAMPS },
{ 2, 3, ENVSYS_SAMPHOUR },
{ 1, 0, -1 },
};
const struct envsys_range acpibat_range_watt[] = {
{ 0, 1, ENVSYS_SVOLTS_DC },
{ 1, 2, ENVSYS_SWATTS },
{ 2, 3, ENVSYS_SWATTHOUR },
{ 1, 0, -1 },
};
#define BAT_WORDS 13
struct acpibat_softc {
struct device sc_dev; /* base device glue */
struct acpi_devnode *sc_node; /* our ACPI devnode */
int sc_flags; /* see below */
struct callout sc_callout; /* XXX temporary polling */
int sc_present; /* is battery present? */
int sc_status; /* power status */
struct sysmon_envsys sc_sysmon;
struct envsys_basic_info sc_info[ACPIBAT_NSENSORS];
struct envsys_tre_data sc_data[ACPIBAT_NSENSORS];
ACPI_OBJECT sc_Ret[BAT_WORDS]; /* Return Buffer */
};
/*
* These flags are used to examine the battery device data returned from
* the ACPI interface, specifically the "battery status"
*/
#define ACPIBAT_PWRUNIT_MA 0x00000001 /* mA not mW */
/*
* These flags are used to examine the battery charge/discharge/critical
* state returned from a get-status command.
*/
#define ACPIBAT_ST_DISCHARGING 0x00000001 /* battery is discharging */
#define ACPIBAT_ST_CHARGING 0x00000002 /* battery is charging */
#define ACPIBAT_ST_CRITICAL 0x00000004 /* battery is critical */
/*
* Flags for battery status from _STA return
*/
#define ACPIBAT_STA_PRESENT 0x00000010 /* battery present */
/*
* These flags are used to set internal state in our softc.
*/
#define ABAT_F_VERBOSE 0x01 /* verbose events */
#define ABAT_F_PWRUNIT_MA 0x02 /* mA instead of mW */
#define ACM_RATEUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"A":"W")
#define ACM_CAPUNIT(sc) (((sc)->sc_flags & ABAT_F_PWRUNIT_MA)?"Ah":"Wh")
#define ACM_SCALE(x) ((x) / 1000), ((x) % 1000)
int acpibat_match(struct device *, struct cfdata *, void *);
void acpibat_attach(struct device *, struct device *, void *);
CFATTACH_DECL(acpibat, sizeof(struct acpibat_softc),
acpibat_match, acpibat_attach, NULL, NULL);
static void acpibat_get_status(void *);
static void acpibat_get_info(void *);
static void acpibat_init_envsys(struct acpibat_softc *);
void acpibat_notify_handler(ACPI_HANDLE, UINT32, void *context);
static void acpibat_tick(void *);
static int acpibat_gtredata(struct sysmon_envsys *, struct envsys_tre_data *);
static int acpibat_streinfo(struct sysmon_envsys *, struct envsys_basic_info *);
static int acpibat_battery_present(void *);
/*
* acpibat_match:
*
* Autoconfiguration `match' routine.
*/
int
acpibat_match(struct device *parent, struct cfdata *match, void *aux)
{
struct acpi_attach_args *aa = aux;
if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE)
return (0);
if (strcmp(aa->aa_node->ad_devinfo.HardwareId, "PNP0C0A") == 0)
return (1);
return (0);
}
/*
* acpibat_attach:
*
* Autoconfiguration `attach' routine.
*/
void
acpibat_attach(struct device *parent, struct device *self, void *aux)
{
struct acpibat_softc *sc = (void *) self;
struct acpi_attach_args *aa = aux;
ACPI_STATUS rv;
printf(": ACPI Battery (Control Method)\n");
sc->sc_node = aa->aa_node;
rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
ACPI_DEVICE_NOTIFY,
acpibat_notify_handler, sc);
if (rv != AE_OK) {
printf("%s: unable to register DEVICE NOTIFY handler: %d\n",
sc->sc_dev.dv_xname, rv);
return;
}
/* XXX See acpibat_notify_handler() */
rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle,
ACPI_SYSTEM_NOTIFY,
acpibat_notify_handler, sc);
if (rv != AE_OK) {
printf("%s: unable to register SYSTEM NOTIFY handler: %d\n",
sc->sc_dev.dv_xname, rv);
return;
}
/*
* XXX poll battery in the driver for now.
* in the future, when we have an API, let userland do this polling
*/
callout_init(&sc->sc_callout);
callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, sc);
/* Display the current state. */
sc->sc_flags = ABAT_F_VERBOSE;
acpibat_get_info(sc);
acpibat_get_status(sc);
acpibat_init_envsys(sc);
}
static void
acpibat_tick(void *arg)
{
struct acpibat_softc *sc = arg;
callout_reset(&sc->sc_callout, 60*hz, acpibat_tick, arg);
AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpibat_get_status, sc);
}
/*
* returns 0 for no battery, 1 for present, and -1 on error
*/
static int
acpibat_battery_present(void *arg)
{
struct acpibat_softc *sc = arg;
u_int32_t sta;
ACPI_OBJECT *p1;
ACPI_STATUS rv;
ACPI_BUFFER buf;
buf.Pointer = sc->sc_Ret;
buf.Length = sizeof(sc->sc_Ret);
rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_STA", NULL, &buf);
if (rv != AE_OK) {
printf("%s: failed to evaluate _STA: %x\n",
sc->sc_dev.dv_xname, rv);
sc->sc_present = -1;
return (-1);
}
p1 = (ACPI_OBJECT *)buf.Pointer;
if (p1->Type != ACPI_TYPE_INTEGER) {
printf("%s: expected INTEGER, got %d\n", sc->sc_dev.dv_xname,
p1->Type);
sc->sc_present = -1;
return (-1);
}
if (p1->Package.Count < 1) {
printf("%s: expected 1 elts, got %d\n",
sc->sc_dev.dv_xname, p1->Package.Count);
sc->sc_present = -1;
return (-1);
}
sta = p1->Integer.Value;
sc->sc_present = (sta & ACPIBAT_STA_PRESENT) ? 1 : 0;
return (sc->sc_present);
}
/*
* acpibat_get_info
*
* Get, and possibly display, the battery info.
*/
static void
acpibat_get_info(void *arg)
{
struct acpibat_softc *sc = arg;
ACPI_OBJECT *p1, *p2;
ACPI_STATUS rv;
ACPI_BUFFER buf;
(void)acpibat_battery_present(sc);
if (sc->sc_present != 1) {
printf("%s: not present\n", sc->sc_dev.dv_xname);
return;
}
rv = acpi_eval_struct(sc->sc_node->ad_handle, "_BIF", &buf);
if (rv != AE_OK) {
printf("%s: failed to evaluate _BIF: %x\n",
sc->sc_dev.dv_xname, rv);
return;
}
p1 = (ACPI_OBJECT *)buf.Pointer;
if (p1->Type != ACPI_TYPE_PACKAGE) {
printf("%s: expected PACKAGE, got %d\n", sc->sc_dev.dv_xname,
p1->Type);
goto out;
}
if (p1->Package.Count < 13) {
printf("%s: expected 13 elts, got %d\n",
sc->sc_dev.dv_xname, p1->Package.Count);
goto out;
}
p2 = p1->Package.Elements;
if ((p2[0].Integer.Value & ACPIBAT_PWRUNIT_MA) != 0)
sc->sc_flags |= ABAT_F_PWRUNIT_MA;
sc->sc_data[ACPIBAT_DCAPACITY].cur.data_s = p2[1].Integer.Value * 1000;
sc->sc_data[ACPIBAT_LFCCAPACITY].cur.data_s = p2[2].Integer.Value * 1000;
sc->sc_data[ACPIBAT_LFCCAPACITY].max.data_s = p2[1].Integer.Value * 1000;
sc->sc_data[ACPIBAT_CAPACITY].max.data_s = p2[1].Integer.Value * 1000;
sc->sc_data[ACPIBAT_TECHNOLOGY].cur.data_s = p2[3].Integer.Value;
sc->sc_data[ACPIBAT_DVOLTAGE].cur.data_s = p2[4].Integer.Value * 1000;
sc->sc_data[ACPIBAT_WCAPACITY].cur.data_s = p2[5].Integer.Value * 1000;
sc->sc_data[ACPIBAT_LCAPACITY].cur.data_s = p2[6].Integer.Value * 1000;
printf("%s: %s %s %s %s\n",
sc->sc_dev.dv_xname,
p2[12].String.Pointer, p2[11].String.Pointer,
p2[9].String.Pointer, p2[10].String.Pointer);
out:
AcpiOsFree(buf.Pointer);
}
/*
* acpibat_get_status:
*
* Get, and possibly display, the current battery line status.
*/
static void
acpibat_get_status(void *arg)
{
int flags;
struct acpibat_softc *sc = arg;
ACPI_OBJECT *p1, *p2;
ACPI_STATUS rv;
ACPI_BUFFER buf;
if (sc->sc_present != 1) {
return;
}
buf.Pointer = sc->sc_Ret;
buf.Length = sizeof(sc->sc_Ret);
rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "_BST", NULL, &buf);
if (rv != AE_OK) {
printf("bat: failed to evaluate _BST: %x\n", rv);
return;
}
p1 = (ACPI_OBJECT *)buf.Pointer;
if (p1->Type != ACPI_TYPE_PACKAGE) {
printf("bat: expected PACKAGE, got %d\n", p1->Type);
return;
}
if (p1->Package.Count < 4) {
printf("bat: expected 4 elts, got %d\n", p1->Package.Count);
return;
}
p2 = p1->Package.Elements;
sc->sc_status = p2[0].Integer.Value;
sc->sc_data[ACPIBAT_LOAD].cur.data_s = p2[1].Integer.Value * 1000;
sc->sc_data[ACPIBAT_CAPACITY].cur.data_s = p2[2].Integer.Value * 1000;
sc->sc_data[ACPIBAT_VOLTAGE].cur.data_s = p2[3].Integer.Value * 1000;
flags = 0;
if (sc->sc_data[ACPIBAT_CAPACITY].cur.data_s < sc->sc_data[ACPIBAT_WCAPACITY].cur.data_s)
flags |= ENVSYS_WARN_UNDER;
if (sc->sc_status & 4)
flags |= ENVSYS_WARN_CRITUNDER;
sc->sc_data[ACPIBAT_CAPACITY].warnflags = flags;
sc->sc_data[ACPIBAT_DISCHARGING].cur.data_s = ((sc->sc_status & ACPIBAT_ST_DISCHARGING) != 0);
sc->sc_data[ACPIBAT_CHARGING].cur.data_s = ((sc->sc_status & ACPIBAT_ST_CHARGING) != 0);
}
/*
* acpibat_notify_handler:
*
* Callback from ACPI interrupt handler to notify us of an event.
*/
void
acpibat_notify_handler(ACPI_HANDLE handle, UINT32 notify, void *context)
{
struct acpibat_softc *sc = context;
int rv;
#ifdef ACPI_BAT_DEBUG
printf("%s: received notify message: 0x%x\n",
sc->sc_dev.dv_xname, notify);
#endif
switch (notify) {
case ACPI_NOTIFY_BusCheck:
break;
case ACPI_NOTIFY_BatteryInformationChanged:
rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
acpibat_get_info, sc);
if (rv != AE_OK)
printf("%s: unable to queue status check: %d\n",
sc->sc_dev.dv_xname, rv);
break;
case ACPI_NOTIFY_BatteryStatusChanged:
rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO,
acpibat_get_status, sc);
if (rv != AE_OK)
printf("%s: unable to queue status check: %d\n",
sc->sc_dev.dv_xname, rv);
break;
default:
printf("%s: received unknown notify message: 0x%x\n",
sc->sc_dev.dv_xname, notify);
}
}
static void
acpibat_init_envsys(struct acpibat_softc *sc)
{
int capunit, rateunit, i;
const char *capstring, *ratestring;
if (sc->sc_flags & ABAT_F_PWRUNIT_MA) {
sc->sc_sysmon.sme_ranges = acpibat_range_amp;
capunit = ENVSYS_SAMPHOUR;
capstring = "charge";
rateunit = ENVSYS_SAMPS;
ratestring = "current";
} else {
sc->sc_sysmon.sme_ranges = acpibat_range_watt;
capunit = ENVSYS_SWATTHOUR;
capstring = "energy";
rateunit = ENVSYS_SWATTS;
ratestring = "power";
}
for (i = 0 ; i < ACPIBAT_NSENSORS; i++) {
sc->sc_data[i].sensor = sc->sc_info[i].sensor = i;
sc->sc_data[i].validflags |= (ENVSYS_FVALID | ENVSYS_FCURVALID);
sc->sc_info[i].validflags = ENVSYS_FVALID;
sc->sc_data[i].warnflags = 0;
}
#define INITDATA(index, unit, string) \
sc->sc_data[index].units = unit; \
sc->sc_info[index].units = unit; \
snprintf(sc->sc_info[index].desc, sizeof(sc->sc_info->desc), \
"%s %s", sc->sc_dev.dv_xname, string); \
INITDATA(ACPIBAT_DCAPACITY, capunit, "design cap");
INITDATA(ACPIBAT_LFCCAPACITY, capunit, "lfc cap");
INITDATA(ACPIBAT_TECHNOLOGY, ENVSYS_INTEGER, "technology");
INITDATA(ACPIBAT_DVOLTAGE, ENVSYS_SVOLTS_DC, "design voltage");
INITDATA(ACPIBAT_WCAPACITY, capunit, "warn cap");
INITDATA(ACPIBAT_LCAPACITY, capunit, "low cap");
INITDATA(ACPIBAT_VOLTAGE, ENVSYS_SVOLTS_DC, "voltage");
INITDATA(ACPIBAT_LOAD, rateunit, ratestring);
INITDATA(ACPIBAT_CAPACITY, capunit, capstring);
INITDATA(ACPIBAT_CHARGING, ENVSYS_INDICATOR, "charging");
INITDATA(ACPIBAT_DISCHARGING, ENVSYS_INDICATOR, "discharging");
/*
* ACPIBAT_CAPACITY is the "gas gauge".
* ACPIBAT_LFCCAPACITY is the "wear gauge".
*/
sc->sc_data[ACPIBAT_CAPACITY].validflags |=
ENVSYS_FMAXVALID | ENVSYS_FFRACVALID;
sc->sc_data[ACPIBAT_LFCCAPACITY].validflags |=
ENVSYS_FMAXVALID | ENVSYS_FFRACVALID;
sc->sc_sysmon.sme_sensor_info = sc->sc_info;
sc->sc_sysmon.sme_sensor_data = sc->sc_data;
sc->sc_sysmon.sme_cookie = sc;
sc->sc_sysmon.sme_gtredata = acpibat_gtredata;
sc->sc_sysmon.sme_streinfo = acpibat_streinfo;
sc->sc_sysmon.sme_nsensors = ACPIBAT_NSENSORS;
sc->sc_sysmon.sme_envsys_version = 1000;
if (sysmon_envsys_register(&sc->sc_sysmon))
printf("%s: unable to register with sysmon\n",
sc->sc_dev.dv_xname);
}
int
acpibat_gtredata(struct sysmon_envsys *sme, struct envsys_tre_data *tred)
{
struct acpibat_softc *sc = sme->sme_cookie;
/* XXX locking */
acpibat_get_status(sc);
*tred = sc->sc_data[tred->sensor];
/* XXX locking */
return (0);
}
int
acpibat_streinfo(struct sysmon_envsys *sme, struct envsys_basic_info *binfo)
{
/* XXX Not implemented */
binfo->validflags = 0;
return (0);
}
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