x86/platform: Add Eurobraille/Iris power off support

	  Support for Unisys ES7000 systems.  Say 'Y' here if this kernel is

	  supposed to run on an IA32-based Unisys ES7000 system.

config X86_32_IRIS

	tristate "Eurobraille/Iris poweroff module"

	depends on X86_32

	---help---

	  The Iris machines from EuroBraille do not have APM or ACPI support

	  to shut themselves down properly.  A special I/O sequence is

	  needed to do so, which is what this module does at

	  kernel shutdown.

	  This is only for Iris machines from EuroBraille.

	  If unused, say N.

config SCHED_OMIT_FRAME_POINTER

	def_bool y

	prompt "Single-depth WCHAN output"

obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o

obj-$(CONFIG_SWIOTLB)			+= pci-swiotlb.o

obj-$(CONFIG_X86_32_IRIS)		+= iris.o

###

# 64 bit specific files

/*

 * Eurobraille/Iris power off support.

 *

 * Eurobraille's Iris machine is a PC with no APM or ACPI support.

 * It is shutdown by a special I/O sequence which this module provides.

 *

 *  Copyright (C) Shérab <Sebastien.Hinderer@ens-lyon.org>

 *

 * 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 the program ; if not, write to the Free Software

 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <linux/moduleparam.h>

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/pm.h>

#include <asm/io.h>

#define IRIS_GIO_BASE		0x340

#define IRIS_GIO_INPUT		IRIS_GIO_BASE

#define IRIS_GIO_OUTPUT		(IRIS_GIO_BASE + 1)

#define IRIS_GIO_PULSE		0x80 /* First byte to send */

#define IRIS_GIO_REST		0x00 /* Second byte to send */

#define IRIS_GIO_NODEV		0xff /* Likely not an Iris */

MODULE_LICENSE("GPL");

MODULE_AUTHOR("Sébastien Hinderer <Sebastien.Hinderer@ens-lyon.org>");

MODULE_DESCRIPTION("A power_off handler for Iris devices from EuroBraille");

MODULE_SUPPORTED_DEVICE("Eurobraille/Iris");

static int force;

module_param(force, bool, 0);

MODULE_PARM_DESC(force, "Set to one to force poweroff handler installation.");

static void (*old_pm_power_off)(void);

static void iris_power_off(void)

{

	outb(IRIS_GIO_PULSE, IRIS_GIO_OUTPUT);

	msleep(850);

	outb(IRIS_GIO_REST, IRIS_GIO_OUTPUT);

}

/*

 * Before installing the power_off handler, try to make sure the OS is

 * running on an Iris.  Since Iris does not support DMI, this is done

 * by reading its input port and seeing whether the read value is

 * meaningful.

 */

static int iris_init(void)

{

	unsigned char status;

	if (force != 1) {

		printk(KERN_ERR "The force parameter has not been set to 1 so the Iris poweroff handler will not be installed.\n");

		return -ENODEV;

	}

	status = inb(IRIS_GIO_INPUT);

	if (status == IRIS_GIO_NODEV) {

		printk(KERN_ERR "This machine does not seem to be an Iris. Power_off handler not installed.\n");

		return -ENODEV;

	}

	old_pm_power_off = pm_power_off;

	pm_power_off = &iris_power_off;

	printk(KERN_INFO "Iris power_off handler installed.\n");

	return 0;

}

static void iris_exit(void)

{

	pm_power_off = old_pm_power_off;

	printk(KERN_INFO "Iris power_off handler uninstalled.\n");

}

module_init(iris_init);

module_exit(iris_exit);