ACPI: remove motherboard driver (redundant with PNP system driver)

obj-y				+= sleep/

obj-y				+= bus.o glue.o

obj-y				+= scan.o motherboard.o

obj-y				+= scan.o

obj-$(CONFIG_ACPI_AC) 		+= ac.o

obj-$(CONFIG_ACPI_BATTERY)	+= battery.o

obj-$(CONFIG_ACPI_BUTTON)	+= button.o

/* 

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *  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.

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

/* Purpose: Prevent PCMCIA cards from using motherboard resources. */

#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/types.h>

#include <linux/pci.h>

#include <linux/ioport.h>

#include <asm/io.h>

#include <acpi/acpi_bus.h>

#include <acpi/acpi_drivers.h>

#define _COMPONENT		ACPI_SYSTEM_COMPONENT

ACPI_MODULE_NAME("acpi_motherboard")

/* Dell use PNP0C01 instead of PNP0C02 */

#define ACPI_MB_HID			"PNP0C01,PNP0C02"

/**

 * Doesn't care about legacy IO ports, only IO ports beyond 0x1000 are reserved

 * Doesn't care about the failure of 'request_region', since other may reserve

 * the io ports as well

 */

#define IS_RESERVED_ADDR(base, len) \

	(((len) > 0) && ((base) > 0) && ((base) + (len) < IO_SPACE_LIMIT) \

	&& ((base) + (len) > PCIBIOS_MIN_IO))

/*

 * Clearing the flag (IORESOURCE_BUSY) allows drivers to use

 * the io ports if they really know they can use it, while

 * still preventing hotplug PCI devices from using it.

 */

/*

 * When CONFIG_PNP is enabled, pnp/system.c binds to PNP0C01

 * and PNP0C02, redundant with acpi_reserve_io_ranges().

 * But acpi_reserve_io_ranges() is necessary for !CONFIG_PNP.

 */

static acpi_status acpi_reserve_io_ranges(struct acpi_resource *res, void *data)

{

	struct resource *requested_res = NULL;

	if (res->type == ACPI_RESOURCE_TYPE_IO) {

		struct acpi_resource_io *io_res = &res->data.io;

		if (io_res->minimum != io_res->maximum)

			return AE_OK;

		if (IS_RESERVED_ADDR

		    (io_res->minimum, io_res->address_length)) {

			ACPI_DEBUG_PRINT((ACPI_DB_INFO,

					  "Motherboard resources 0x%08x - 0x%08x\n",

					  io_res->minimum,

					  io_res->minimum +

					  io_res->address_length));

			requested_res =

			    request_region(io_res->minimum,

					   io_res->address_length, "motherboard");

		}

	} else if (res->type == ACPI_RESOURCE_TYPE_FIXED_IO) {

		struct acpi_resource_fixed_io *fixed_io_res =

		    &res->data.fixed_io;

		if (IS_RESERVED_ADDR

		    (fixed_io_res->address, fixed_io_res->address_length)) {

			ACPI_DEBUG_PRINT((ACPI_DB_INFO,

					  "Motherboard resources 0x%08x - 0x%08x\n",

					  fixed_io_res->address,

					  fixed_io_res->address +

					  fixed_io_res->address_length));

			requested_res =

			    request_region(fixed_io_res->address,

					   fixed_io_res->address_length,

					   "motherboard");

		}

	} else {

		/* Memory mapped IO? */

	}

	if (requested_res)

		requested_res->flags &= ~IORESOURCE_BUSY;

	return AE_OK;

}

static int acpi_motherboard_add(struct acpi_device *device)

{

	if (!device)

		return -EINVAL;

	acpi_walk_resources(device->handle, METHOD_NAME__CRS,

			    acpi_reserve_io_ranges, NULL);

	return 0;

}

static struct acpi_driver acpi_motherboard_driver = {

	.name = "motherboard",

	.class = "",

	.ids = ACPI_MB_HID,

	.ops = {

		.add = acpi_motherboard_add,

		},

};

static int __init acpi_motherboard_init(void)

{

	acpi_bus_register_driver(&acpi_motherboard_driver);

	return 0;

}

/**

 * Reserve motherboard resources after PCI claim BARs,

 * but before PCI assign resources for uninitialized PCI devices

 */

fs_initcall(acpi_motherboard_init);