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freebsd-skq/sys/i386/acpica/acpi_machdep.c
njl addc11daaf Remove a "needs Giant" flag from the /dev/apm compat device. 
MFC after:	2 weeks
2004-10-22 17:17:12 +00:00

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/*-
* Copyright (c) 2001 Mitsuru IWASAKI
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
/*
* APM driver emulation
*/
#include <sys/selinfo.h>
#include <machine/apm_bios.h>
#include <machine/pc/bios.h>
#include <i386/bios/apm.h>
uint32_t acpi_reset_video = 1;
TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
static int intr_model = ACPI_INTR_PIC;
static int apm_active;
static d_open_t apmopen;
static d_close_t apmclose;
static d_write_t apmwrite;
static d_ioctl_t apmioctl;
static d_poll_t apmpoll;
static struct cdevsw apm_cdevsw = {
.d_version = D_VERSION,
.d_open = apmopen,
.d_close = apmclose,
.d_write = apmwrite,
.d_ioctl = apmioctl,
.d_poll = apmpoll,
.d_name = "apm",
};
static int
acpi_capm_convert_battstate(struct acpi_battinfo *battp)
{
int state;
state = APM_UNKNOWN;
if (battp->state & ACPI_BATT_STAT_DISCHARG) {
if (battp->cap >= 50)
state = 0; /* high */
else
state = 1; /* low */
}
if (battp->state & ACPI_BATT_STAT_CRITICAL)
state = 2; /* critical */
if (battp->state & ACPI_BATT_STAT_CHARGING)
state = 3; /* charging */
/* If still unknown, determine it based on the battery capacity. */
if (state == APM_UNKNOWN) {
if (battp->cap >= 50)
state = 0; /* high */
else
state = 1; /* low */
}
return (state);
}
static int
acpi_capm_convert_battflags(struct acpi_battinfo *battp)
{
int flags;
flags = 0;
if (battp->cap >= 50)
flags |= APM_BATT_HIGH;
else {
if (battp->state & ACPI_BATT_STAT_CRITICAL)
flags |= APM_BATT_CRITICAL;
else
flags |= APM_BATT_LOW;
}
if (battp->state & ACPI_BATT_STAT_CHARGING)
flags |= APM_BATT_CHARGING;
if (battp->state == ACPI_BATT_STAT_NOT_PRESENT)
flags = APM_BATT_NOT_PRESENT;
return (flags);
}
static int
acpi_capm_get_info(apm_info_t aip)
{
int acline;
struct acpi_battinfo batt;
aip->ai_infoversion = 1;
aip->ai_major = 1;
aip->ai_minor = 2;
aip->ai_status = apm_active;
aip->ai_capabilities= 0xff00; /* unknown */
if (acpi_acad_get_acline(&acline))
aip->ai_acline = APM_UNKNOWN; /* unknown */
else
aip->ai_acline = acline; /* on/off */
if (acpi_battery_get_battinfo(-1, &batt)) {
aip->ai_batt_stat = APM_UNKNOWN;
aip->ai_batt_life = APM_UNKNOWN;
aip->ai_batt_time = -1; /* unknown */
aip->ai_batteries = ~0U; /* unknown */
} else {
aip->ai_batt_stat = acpi_capm_convert_battstate(&batt);
aip->ai_batt_life = batt.cap;
aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
aip->ai_batteries = acpi_battery_get_units();
}
return (0);
}
static int
acpi_capm_get_pwstatus(apm_pwstatus_t app)
{
int batt_unit;
int acline;
struct acpi_battinfo batt;
if (app->ap_device != PMDV_ALLDEV &&
(app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
return (1);
if (app->ap_device == PMDV_ALLDEV)
batt_unit = -1; /* all units */
else
batt_unit = app->ap_device - PMDV_BATT0;
if (acpi_battery_get_battinfo(batt_unit, &batt))
return (1);
app->ap_batt_stat = acpi_capm_convert_battstate(&batt);
app->ap_batt_flag = acpi_capm_convert_battflags(&batt);
app->ap_batt_life = batt.cap;
app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
if (acpi_acad_get_acline(&acline))
app->ap_acline = APM_UNKNOWN;
else
app->ap_acline = acline; /* on/off */
return (0);
}
static int
apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
{
int error = 0;
struct acpi_softc *acpi_sc;
struct apm_info info;
apm_info_old_t aiop;
acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
switch (cmd) {
case APMIO_SUSPEND:
if ((flag & FWRITE) == 0)
return (EPERM);
if (apm_active)
acpi_SetSleepState(acpi_sc, acpi_sc->acpi_suspend_sx);
else
error = EINVAL;
break;
case APMIO_STANDBY:
if ((flag & FWRITE) == 0)
return (EPERM);
if (apm_active)
acpi_SetSleepState(acpi_sc, acpi_sc->acpi_standby_sx);
else
error = EINVAL;
break;
case APMIO_GETINFO_OLD:
if (acpi_capm_get_info(&info))
error = ENXIO;
aiop = (apm_info_old_t)addr;
aiop->ai_major = info.ai_major;
aiop->ai_minor = info.ai_minor;
aiop->ai_acline = info.ai_acline;
aiop->ai_batt_stat = info.ai_batt_stat;
aiop->ai_batt_life = info.ai_batt_life;
aiop->ai_status = info.ai_status;
break;
case APMIO_GETINFO:
if (acpi_capm_get_info((apm_info_t)addr))
error = ENXIO;
break;
case APMIO_GETPWSTATUS:
if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr))
error = ENXIO;
break;
case APMIO_ENABLE:
if ((flag & FWRITE) == 0)
return (EPERM);
apm_active = 1;
break;
case APMIO_DISABLE:
if ((flag & FWRITE) == 0)
return (EPERM);
apm_active = 0;
break;
case APMIO_HALTCPU:
break;
case APMIO_NOTHALTCPU:
break;
case APMIO_DISPLAY:
if ((flag & FWRITE) == 0)
return (EPERM);
break;
case APMIO_BIOS:
if ((flag & FWRITE) == 0)
return (EPERM);
bzero(addr, sizeof(struct apm_bios_arg));
break;
default:
error = EINVAL;
break;
}
return (error);
}
static int
apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
{
return (uio->uio_resid);
}
static int
apmpoll(struct cdev *dev, int events, d_thread_t *td)
{
return (0);
}
static void
acpi_capm_init(struct acpi_softc *sc)
{
make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
}
int
acpi_machdep_init(device_t dev)
{
struct acpi_softc *sc;
sc = devclass_get_softc(devclass_find("acpi"), 0);
acpi_capm_init(sc);
acpi_install_wakeup_handler(sc);
if (intr_model == ACPI_INTR_PIC)
BUS_CONFIG_INTR(dev, AcpiGbl_FADT->SciInt, INTR_TRIGGER_LEVEL,
INTR_POLARITY_LOW);
else
acpi_SetIntrModel(intr_model);
SYSCTL_ADD_UINT(&sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(sc->acpi_sysctl_tree), OID_AUTO,
"reset_video", CTLFLAG_RD | CTLFLAG_RW, &acpi_reset_video, 0,
"Call the VESA reset BIOS vector on the resume path");
return (0);
}
void
acpi_SetDefaultIntrModel(int model)
{
intr_model = model;
}
/* Check BIOS date. If 1998 or older, disable ACPI. */
int
acpi_machdep_quirks(int *quirks)
{
char *va;
int year;
/* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
va = pmap_mapdev(0xffff0, 16);
sscanf(va + 11, "%2d", &year);
pmap_unmapdev((vm_offset_t)va, 16);
/*
* Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
* check must be changed by my 114th birthday.
*/
if (year > 90 && year < 99)
*quirks = ACPI_Q_BROKEN;
return (0);
}
void
acpi_cpu_c1()
{
__asm __volatile("sti; hlt");
}
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