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Commit dd8cd779 authored by Carlos Corbacho's avatar Carlos Corbacho Committed by Len Brown
Browse files

tc1100-wmi: Add driver for HP Compaq TC1100 Tablets 



This is based on the 2004 out-of-tree work of Jamey Hicks, to add
support via WMI for controlling the jog dial and wireless on these
tablets.

v1:

Original release

v2:

As per Joshua Wise's comments, change bluetooth to jogdial (an error from
the original driver).

Signed-off-by: default avatarCarlos Corbacho <carlos@strangeworlds.co.uk>
CC: Matthew Garrett <mjg59@srcf.ucam.org>
CC: Jamey Hicks <jamey.hicks@nokia.com>
CC: Joshua Wise <joshua@joshuawise.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 745a5d21

MAINTAINERS

+5 −0
Original line number Diff line number Diff line
@@ -1794,6 +1794,11 @@ P: Jaroslav Kysela 
M:	perex@perex.cz

S:	Maintained



HP COMPAQ TC1100 TABLET WMI EXTRAS DRIVER

P:	Carlos Corbacho

M:	carlos@strangeworlds.co.uk

S:	Odd Fixes



HPET:	High Precision Event Timers driver (hpet.c)

P:	Clemens Ladisch

M:	clemens@ladisch.de

drivers/misc/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -142,6 +142,15 @@ config FUJITSU_LAPTOP 


	  If you have a Fujitsu laptop, say Y or M here.



config TC1100_WMI

	tristate "HP Compaq TC1100 Tablet WMI Extras"

	depends on X86 && !X86_64

	depends on ACPI

	depends on ACPI_WMI

	---help---

	  This is a driver for the WMI extensions (wireless and bluetooth power

	  control) of the HP Compaq TC1100 tablet.



config MSI_LAPTOP

        tristate "MSI Laptop Extras"

        depends on X86

drivers/misc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o 
obj-$(CONFIG_ACER_WMI)     += acer-wmi.o

obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o

obj-$(CONFIG_ATMEL_SSC)		+= atmel-ssc.o

obj-$(CONFIG_TC1100_WMI)	+= tc1100-wmi.o

obj-$(CONFIG_LKDTM)		+= lkdtm.o

obj-$(CONFIG_TIFM_CORE)       	+= tifm_core.o

obj-$(CONFIG_TIFM_7XX1)       	+= tifm_7xx1.o

drivers/misc/tc1100-wmi.c

0 → 100644
+290 −0
Original line number Diff line number Diff line 
/*

 *  HP Compaq TC1100 Tablet WMI Extras Driver

 *

 *  Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk>

 *  Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>

 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>

 *  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/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/types.h>

#include <acpi/acpi.h>

#include <acpi/actypes.h>

#include <acpi/acpi_bus.h>

#include <acpi/acpi_drivers.h>

#include <linux/platform_device.h>



#define GUID "C364AC71-36DB-495A-8494-B439D472A505"



#define TC1100_INSTANCE_WIRELESS		1

#define TC1100_INSTANCE_JOGDIAL		2



#define TC1100_LOGPREFIX "tc1100-wmi: "

#define TC1100_INFO KERN_INFO TC1100_LOGPREFIX



MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");

MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");

MODULE_LICENSE("GPL");

MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");



static int tc1100_probe(struct platform_device *device);

static int tc1100_remove(struct platform_device *device);

static int tc1100_suspend(struct platform_device *device, pm_message_t state);

static int tc1100_resume(struct platform_device *device);



static struct platform_driver tc1100_driver = {

	.driver = {

		.name = "tc1100-wmi",

		.owner = THIS_MODULE,

	},

	.probe = tc1100_probe,

	.remove = tc1100_remove,

	.suspend = tc1100_suspend,

	.resume = tc1100_resume,

};



static struct platform_device *tc1100_device;



struct tc1100_data {

	u32 wireless;

	u32 jogdial;

};



static struct tc1100_data suspend_data;



/* --------------------------------------------------------------------------

				Device Management

   -------------------------------------------------------------------------- */



static int get_state(u32 *out, u8 instance)

{

	u32 tmp;

	acpi_status status;

	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };

	union acpi_object *obj;



	if (!out)

		return -EINVAL;



	if (instance > 2)

		return -ENODEV;



	status = wmi_query_block(GUID, instance, &result);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	obj = (union acpi_object *) result.pointer;

	if (obj && obj->type == ACPI_TYPE_BUFFER &&

		obj->buffer.length == sizeof(u32)) {

		tmp = *((u32 *) obj->buffer.pointer);

	} else {

		tmp = 0;

	}



	if (result.length > 0 && result.pointer)

		kfree(result.pointer);



	switch (instance) {

	case TC1100_INSTANCE_WIRELESS:

		*out = (tmp == 3) ? 1 : 0;

		return 0;

	case TC1100_INSTANCE_JOGDIAL:

		*out = (tmp == 1) ? 1 : 0;

		return 0;

	default:

		return -ENODEV;

	}

}



static int set_state(u32 *in, u8 instance)

{

	u32 value;

	acpi_status status;

	struct acpi_buffer input;



	if (!in)

		return -EINVAL;



	if (instance > 2)

		return -ENODEV;



	switch (instance) {

	case TC1100_INSTANCE_WIRELESS:

		value = (*in) ? 1 : 2;

		break;

	case TC1100_INSTANCE_JOGDIAL:

		value = (*in) ? 0 : 1;

		break;

	default:

		return -ENODEV;

	}



	input.length = sizeof(u32);

	input.pointer = &value;



	status = wmi_set_block(GUID, instance, &input);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	return 0;

}



/* --------------------------------------------------------------------------

				FS Interface (/sys)

   -------------------------------------------------------------------------- */



/*

 * Read/ write bool sysfs macro

 */

#define show_set_bool(value, instance) \

static ssize_t \

show_bool_##value(struct device *dev, struct device_attribute *attr, \

	char *buf) \

{ \

	u32 result; \

	acpi_status status = get_state(&result, instance); \

	if (ACPI_SUCCESS(status)) \

		return sprintf(buf, "%d\n", result); \

	return sprintf(buf, "Read error\n"); \

} \

\

static ssize_t \

set_bool_##value(struct device *dev, struct device_attribute *attr, \

	const char *buf, size_t count) \

{ \

	u32 tmp = simple_strtoul(buf, NULL, 10); \

	acpi_status status = set_state(&tmp, instance); \

		if (ACPI_FAILURE(status)) \

			return -EINVAL; \

	return count; \

} \

static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \

	show_bool_##value, set_bool_##value);



show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);

show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);



static void remove_fs(void)

{

	device_remove_file(&tc1100_device->dev, &dev_attr_wireless);

	device_remove_file(&tc1100_device->dev, &dev_attr_jogdial);

}



static int add_fs(void)

{

	int ret;



	ret = device_create_file(&tc1100_device->dev, &dev_attr_wireless);

	if (ret)

		goto add_sysfs_error;



	ret = device_create_file(&tc1100_device->dev, &dev_attr_jogdial);

	if (ret)

		goto add_sysfs_error;



	return ret;



add_sysfs_error:

	remove_fs();

	return ret;

}



/* --------------------------------------------------------------------------

				Driver Model

   -------------------------------------------------------------------------- */



static int tc1100_probe(struct platform_device *device)

{

	int result = 0;



	result = add_fs();

	return result;

}





static int tc1100_remove(struct platform_device *device)

{

	remove_fs();

	return 0;

}



static int tc1100_suspend(struct platform_device *dev, pm_message_t state)

{

	int ret;



	ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);

	if (ret)

		return ret;



	ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);

	if (ret)

		return ret;



	return ret;

}



static int tc1100_resume(struct platform_device *dev)

{

	int ret;



	ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);

	if (ret)

		return ret;



	ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);

	if (ret)

		return ret;



	return ret;

}



static int __init tc1100_init(void)

{

	int result = 0;



	if (!wmi_has_guid(GUID))

		return -ENODEV;



	result = platform_driver_register(&tc1100_driver);

	if (result)

		return result;



	tc1100_device = platform_device_alloc("tc1100-wmi", -1);

	platform_device_add(tc1100_device);



	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");



	return result;

}



static void __exit tc1100_exit(void)

{

	platform_device_del(tc1100_device);

	platform_driver_unregister(&tc1100_driver);



	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");

}



module_init(tc1100_init);

module_exit(tc1100_exit);