path: root/drivers/acpi/bus.c

/*
 *  acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
 *
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or (at
 *  your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/sched.h>
#include <linux/pm.h>
#include <linux/device.h>
#include <linux/proc_fs.h>
#include <linux/acpi.h>
#ifdef CONFIG_X86
#include <asm/mpspec.h>
#endif
#include <linux/pci.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/dmi.h>

#include "internal.h"

#define _COMPONENT		ACPI_BUS_COMPONENT
ACPI_MODULE_NAME("bus");

struct acpi_device *acpi_root;
struct proc_dir_entry *acpi_root_dir;
EXPORT_SYMBOL(acpi_root_dir);

#define STRUCT_TO_INT(s)	(*((int*)&s))

static int set_power_nocheck(const struct dmi_system_id *id)
{
	printk(KERN_NOTICE PREFIX "%s detected - "
		"disable power check in power transistion\n", id->ident);
	acpi_power_nocheck = 1;
	return 0;
}
static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
	{
	set_power_nocheck, "HP Pavilion 05", {
	DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
	DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"),
	DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL},
	{},
};


/* --------------------------------------------------------------------------
                                Device Management
   -------------------------------------------------------------------------- */

int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
{
	acpi_status status = AE_OK;


	if (!device)
		return -EINVAL;

	/* TBD: Support fixed-feature devices */

	status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
	if (ACPI_FAILURE(status) || !*device) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
				  handle));
		return -ENODEV;
	}

	return 0;
}

EXPORT_SYMBOL(acpi_bus_get_device);

acpi_status acpi_bus_get_status_handle(acpi_handle handle,
				       unsigned long long *sta)
{
	acpi_status status;

	status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
	if (ACPI_SUCCESS(status))
		return AE_OK;

	if (status == AE_NOT_FOUND) {
		*sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
		       ACPI_STA_DEVICE_UI      | ACPI_STA_DEVICE_FUNCTIONING;
		return AE_OK;
	}
	return status;
}

int acpi_bus_get_status(struct acpi_device *device)
{
	acpi_status status;
	unsigned long long sta;

	status = acpi_bus_get_status_handle(device->handle, &sta);
	if (ACPI_FAILURE(status))
		return -ENODEV;

	STRUCT_TO_INT(device->status) = (int) sta;

	if (device->status.functional && !device->status.present) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
		       "functional but not present;\n",
			device->pnp.bus_id,
			(u32) STRUCT_TO_INT(device->status)));
	}

	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
			  device->pnp.bus_id,
			  (u32) STRUCT_TO_INT(device->status)));
	return 0;
}
EXPORT_SYMBOL(acpi_bus_get_status);

void acpi_bus_private_data_handler(acpi_handle handle,
				   void *context)
{
	return;
}
EXPORT_SYMBOL(acpi_bus_private_data_handler);

int acpi_bus_get_private_data(acpi_handle handle, void **data)
{
	acpi_status status = AE_OK;

	if (!*data)
		return -EINVAL;

	status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
	if (ACPI_FAILURE(status) || !*data) {
		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
				handle));
		return -ENODEV;
	}

	return 0;
}
EXPORT_SYMBOL(acpi_bus_get_private_data);

/* --------------------------------------------------------------------------
                                 Power Management
   -------------------------------------------------------------------------- */

int acpi_bus_get_power(acpi_handle handle, int *state)
{
	int result = 0;
	acpi_status status = 0;
	struct acpi_device *device = NULL;
	unsigned long long psc = 0;


	result = acpi_bus_get_device(handle, &device);
	if (result)