/* 

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

 *  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/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_HID1			"PNP0C01"

#define ACPI_MB_HID2			"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))

static acpi_status

acpi_reserve_io_ranges (struct acpi_resource *res, void *data)

{

	ACPI_FUNCTION_TRACE("acpi_reserve_io_ranges");

	if (res->id == ACPI_RSTYPE_IO) {

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

		if (io_res->min_base_address != io_res->max_base_address)

			return AE_OK;

		if (IS_RESERVED_ADDR(io_res->min_base_address, io_res->range_length)) {

			ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Motherboard resources 0x%08x - 0x%08x\n",

				io_res->min_base_address, 

				io_res->min_base_address + io_res->range_length));

			request_region(io_res->min_base_address, 

				io_res->range_length, "motherboard");

		}

	}else if (res->id == ACPI_RSTYPE_FIXED_IO) {

		struct acpi_resource_fixed_io *fixed_io_res = &res->data.fixed_io;

		if (IS_RESERVED_ADDR(fixed_io_res->base_address, fixed_io_res->range_length)) {

			ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Motherboard resources 0x%08x - 0x%08x\n",

				fixed_io_res->base_address, 

				fixed_io_res->base_address + fixed_io_res->range_length));

			request_region(fixed_io_res->base_address, 

				fixed_io_res->range_length, "motherboard");

		}

	}else {

		/* Memory mapped IO? */

	}

	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_driver1 = {

	.name =		"motherboard",

	.class =	"",

	.ids =		ACPI_MB_HID1,

	.ops =	{

		.add =		acpi_motherboard_add,

	},

};

static struct acpi_driver acpi_motherboard_driver2 = {

	.name =		"motherboard",

	.class =	"",

	.ids =		ACPI_MB_HID2,

	.ops =	{

		.add =		acpi_motherboard_add,

	},

};

static void __init

acpi_reserve_resources (void)

{

	if (acpi_gbl_FADT->xpm1a_evt_blk.address && acpi_gbl_FADT->pm1_evt_len)

		request_region(acpi_gbl_FADT->xpm1a_evt_blk.address, 

			acpi_gbl_FADT->pm1_evt_len, "PM1a_EVT_BLK");

	if (acpi_gbl_FADT->xpm1b_evt_blk.address && acpi_gbl_FADT->pm1_evt_len)

		request_region(acpi_gbl_FADT->xpm1b_evt_blk.address,

			acpi_gbl_FADT->pm1_evt_len, "PM1b_EVT_BLK");

	if (acpi_gbl_FADT->xpm1a_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len)

		request_region(acpi_gbl_FADT->xpm1a_cnt_blk.address, 

			acpi_gbl_FADT->pm1_cnt_len, "PM1a_CNT_BLK");

	if (acpi_gbl_FADT->xpm1b_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len)

		request_region(acpi_gbl_FADT->xpm1b_cnt_blk.address, 

			acpi_gbl_FADT->pm1_cnt_len, "PM1b_CNT_BLK");

	if (acpi_gbl_FADT->xpm_tmr_blk.address && acpi_gbl_FADT->pm_tm_len == 4)

		request_region(acpi_gbl_FADT->xpm_tmr_blk.address,

			4, "PM_TMR");

	if (acpi_gbl_FADT->xpm2_cnt_blk.address && acpi_gbl_FADT->pm2_cnt_len)

		request_region(acpi_gbl_FADT->xpm2_cnt_blk.address,

			acpi_gbl_FADT->pm2_cnt_len, "PM2_CNT_BLK");

	/* Length of GPE blocks must be a non-negative multiple of 2 */

	if (acpi_gbl_FADT->xgpe0_blk.address && acpi_gbl_FADT->gpe0_blk_len &&

			!(acpi_gbl_FADT->gpe0_blk_len & 0x1))

		request_region(acpi_gbl_FADT->xgpe0_blk.address,

			acpi_gbl_FADT->gpe0_blk_len, "GPE0_BLK");

	if (acpi_gbl_FADT->xgpe1_blk.address && acpi_gbl_FADT->gpe1_blk_len &&

			!(acpi_gbl_FADT->gpe1_blk_len & 0x1))

		request_region(acpi_gbl_FADT->xgpe1_blk.address,

			acpi_gbl_FADT->gpe1_blk_len, "GPE1_BLK");

}

static int __init acpi_motherboard_init(void)

{

	acpi_bus_register_driver(&acpi_motherboard_driver1);

	acpi_bus_register_driver(&acpi_motherboard_driver2);

	/* 

	 * Guarantee motherboard IO reservation first

	 * This module must run after scan.c

	 */

	if (!acpi_disabled)

		acpi_reserve_resources ();

	return 0;

}

subsys_initcall(acpi_motherboard_init);