[linux-2.6-block.git] / drivers / platform / x86 / tc1100-wmi.c

/*
 *  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/slab.h>
#include <linux/init.h>
#include <linux/types.h>
#include <acpi/acpi.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 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_INTEGER) {
		tmp = obj->integer.value;
	} 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) ? 0 : 1;
		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 struct attribute *tc1100_attributes[] = {
	&dev_attr_wireless.attr,
	&dev_attr_jogdial.attr,
	NULL
};

static struct attribute_group tc1100_attribute_group = {
	.attrs	= tc1100_attributes,
};

/* --------------------------------------------------------------------------
				Driver Model
   -------------------------------------------------------------------------- */

static int __init tc1100_probe(struct platform_device *device)
{
	return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
}


static int __devexit tc1100_remove(struct platform_device *device)
{
	sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);

	return 0;
}

#ifdef CONFIG_PM
static int tc1100_suspend(struct device *dev)
{
	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 0;
}

static int tc1100_resume(struct 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 0;
}

static const struct dev_pm_ops tc1100_pm_ops = {
	.suspend	= tc1100_suspend,
	.resume		= tc1100_resume,
	.freeze		= tc1100_suspend,
	.restore	= tc1100_resume,
};
#endif

static struct platform_driver tc1100_driver = {
	.driver = {
		.name = "tc1100-wmi",
		.owner = THIS_MODULE,
#ifdef CONFIG_PM
		.pm = &tc1100_pm_ops,
#endif
	},
	.remove = __devexit_p(tc1100_remove),
};

static int __init tc1100_init(void)
{
	int error;

	if (!wmi_has_guid(GUID))
		return -ENODEV;

	tc1100_device = platform_device_alloc("tc1100-wmi", -1);
	if (!tc1100_device)
		return -ENOMEM;

	error = platform_device_add(tc1100_device);
	if (error)
		goto err_device_put;

	error = platform_driver_probe(&tc1100_driver, tc1100_probe);
	if (error)
		goto err_device_del;

	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
	return 0;

 err_device_del:
	platform_device_del(tc1100_device);
 err_device_put:
	platform_device_put(tc1100_device);
	return error;
}

static void __exit tc1100_exit(void)
{
	platform_device_unregister(tc1100_device);
	platform_driver_unregister(&tc1100_driver);
}

module_init(tc1100_init);
module_exit(tc1100_exit);
Commit	Line	Data
dd8cd779 CC	1	/*
	2	* HP Compaq TC1100 Tablet WMI Extras Driver
	3	*
	4	* Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk>
	5	* Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>
	6	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	7	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	8	*
	9	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2 of the License, or (at
	14	* your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful, but
	17	* WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	19	* General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License along
	22	* with this program; if not, write to the Free Software Foundation, Inc.,
	23	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	24	*
	25	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	26	*/
	27
	28	#include <linux/kernel.h>
	29	#include <linux/module.h>
5a0e3ad6	30	#include <linux/slab.h>
dd8cd779 CC	31	#include <linux/init.h>
	32	#include <linux/types.h>
	33	#include <acpi/acpi.h>
dd8cd779 CC	34	#include <acpi/acpi_bus.h>
	35	#include <acpi/acpi_drivers.h>
	36	#include <linux/platform_device.h>
	37
	38	#define GUID "C364AC71-36DB-495A-8494-B439D472A505"
	39
	40	#define TC1100_INSTANCE_WIRELESS 1
	41	#define TC1100_INSTANCE_JOGDIAL 2
	42
	43	#define TC1100_LOGPREFIX "tc1100-wmi: "
	44	#define TC1100_INFO KERN_INFO TC1100_LOGPREFIX
	45
	46	MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
	47	MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
	48	MODULE_LICENSE("GPL");
	49	MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
	50
dd8cd779 CC	51	static struct platform_device *tc1100_device;
	52
	53	struct tc1100_data {
	54	u32 wireless;
	55	u32 jogdial;
	56	};
	57
	58	static struct tc1100_data suspend_data;
	59
	60	/* --------------------------------------------------------------------------
	61	Device Management
	62	-------------------------------------------------------------------------- */
	63
	64	static int get_state(u32 *out, u8 instance)
	65	{
	66	u32 tmp;
	67	acpi_status status;
	68	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
	69	union acpi_object *obj;
	70
	71	if (!out)
	72	return -EINVAL;
	73
	74	if (instance > 2)
	75	return -ENODEV;
	76
	77	status = wmi_query_block(GUID, instance, &result);
	78	if (ACPI_FAILURE(status))
	79	return -ENODEV;
	80
	81	obj = (union acpi_object *) result.pointer;
07de5bdb KK	82	if (obj && obj->type == ACPI_TYPE_INTEGER) {
07de5bdb KK	83	tmp = obj->integer.value;
dd8cd779 CC	84	} else {
	85	tmp = 0;
	86	}
	87
	88	if (result.length > 0 && result.pointer)
	89	kfree(result.pointer);
	90
	91	switch (instance) {
	92	case TC1100_INSTANCE_WIRELESS:
	93	*out = (tmp == 3) ? 1 : 0;
	94	return 0;
	95	case TC1100_INSTANCE_JOGDIAL:
07de5bdb	96	*out = (tmp == 1) ? 0 : 1;
dd8cd779 CC	97	return 0;
	98	default:
	99	return -ENODEV;
	100	}
	101	}
	102
	103	static int set_state(u32 *in, u8 instance)
	104	{
	105	u32 value;
	106	acpi_status status;
	107	struct acpi_buffer input;
	108
	109	if (!in)
	110	return -EINVAL;
	111
	112	if (instance > 2)
	113	return -ENODEV;
	114
	115	switch (instance) {
	116	case TC1100_INSTANCE_WIRELESS:
	117	value = (*in) ? 1 : 2;
	118	break;
	119	case TC1100_INSTANCE_JOGDIAL:
	120	value = (*in) ? 0 : 1;
	121	break;
	122	default:
	123	return -ENODEV;
	124	}
	125
	126	input.length = sizeof(u32);
	127	input.pointer = &value;
	128
	129	status = wmi_set_block(GUID, instance, &input);
	130	if (ACPI_FAILURE(status))
	131	return -ENODEV;
	132
	133	return 0;
	134	}
	135
	136	/* --------------------------------------------------------------------------
	137	FS Interface (/sys)
	138	-------------------------------------------------------------------------- */
	139
	140	/*
	141	* Read/ write bool sysfs macro
	142	*/
	143	#define show_set_bool(value, instance) \
	144	static ssize_t \
	145	show_bool_##value(struct device dev, struct device_attribute attr, \
	146	char *buf) \
	147	{ \
	148	u32 result; \
	149	acpi_status status = get_state(&result, instance); \
	150	if (ACPI_SUCCESS(status)) \
	151	return sprintf(buf, "%d\n", result); \
	152	return sprintf(buf, "Read error\n"); \
	153	} \
	154	\
	155	static ssize_t \
	156	set_bool_##value(struct device dev, struct device_attribute attr, \
	157	const char *buf, size_t count) \
	158	{ \
	159	u32 tmp = simple_strtoul(buf, NULL, 10); \
	160	acpi_status status = set_state(&tmp, instance); \
161	if (ACPI_FAILURE(status)) \
162	return -EINVAL; \
163	return count; \
164	} \
165	static DEVICE_ATTR(value, S_IWUGO \| S_IRUGO \| S_IWUSR, \
166	show_bool_##value, set_bool_##value);
167
168	show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
169	show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
170
0ad3dc3a DT	171	static struct attribute *tc1100_attributes[] = {
	172	&dev_attr_wireless.attr,
	173	&dev_attr_jogdial.attr,
	174	NULL
	175	};
dd8cd779	176
0ad3dc3a DT	177	static struct attribute_group tc1100_attribute_group = {
	178	.attrs = tc1100_attributes,
	179	};
dd8cd779 CC	180
	181	/* --------------------------------------------------------------------------
	182	Driver Model
	183	-------------------------------------------------------------------------- */
	184
9634a627	185	static int __init tc1100_probe(struct platform_device *device)
dd8cd779	186	{
0ad3dc3a	187	return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
dd8cd779 CC	188	}
	189
	190
9634a627	191	static int __devexit tc1100_remove(struct platform_device *device)
dd8cd779	192	{
0ad3dc3a DT	193	sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);
0ad3dc3a DT	194
dd8cd779 CC	195	return 0;
	196	}
	197
8e698a3c DT	198	#ifdef CONFIG_PM
8e698a3c DT	199	static int tc1100_suspend(struct device *dev)
dd8cd779 CC	200	{
	201	int ret;
	202
	203	ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
	204	if (ret)
	205	return ret;
	206
	207	ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
	208	if (ret)
	209	return ret;
	210
8e698a3c	211	return 0;
dd8cd779 CC	212	}
dd8cd779 CC	213
8e698a3c	214	static int tc1100_resume(struct device *dev)
dd8cd779 CC	215	{
	216	int ret;
	217
	218	ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
	219	if (ret)
	220	return ret;
	221
	222	ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
	223	if (ret)
	224	return ret;
	225
8e698a3c	226	return 0;
dd8cd779 CC	227	}
dd8cd779 CC	228
8e698a3c DT	229	static const struct dev_pm_ops tc1100_pm_ops = {
	230	.suspend = tc1100_suspend,
	231	.resume = tc1100_resume,
	232	.freeze = tc1100_suspend,
	233	.restore = tc1100_resume,
	234	};
	235	#endif
	236
9634a627 DT	237	static struct platform_driver tc1100_driver = {
	238	.driver = {
	239	.name = "tc1100-wmi",
	240	.owner = THIS_MODULE,
8e698a3c DT	241	#ifdef CONFIG_PM
	242	.pm = &tc1100_pm_ops,
	243	#endif
9634a627 DT	244	},
9634a627 DT	245	.remove = __devexit_p(tc1100_remove),
9634a627 DT	246	};
9634a627 DT	247
dd8cd779 CC	248	static int __init tc1100_init(void)
dd8cd779 CC	249	{
9634a627	250	int error;
dd8cd779 CC	251
	252	if (!wmi_has_guid(GUID))
	253	return -ENODEV;
	254
dd8cd779	255	tc1100_device = platform_device_alloc("tc1100-wmi", -1);
9634a627 DT	256	if (!tc1100_device)
	257	return -ENOMEM;
	258
	259	error = platform_device_add(tc1100_device);
	260	if (error)
	261	goto err_device_put;
	262
	263	error = platform_driver_probe(&tc1100_driver, tc1100_probe);
	264	if (error)
	265	goto err_device_del;
dd8cd779 CC	266
dd8cd779 CC	267	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
9634a627	268	return 0;
dd8cd779	269
9634a627 DT	270	err_device_del:
	271	platform_device_del(tc1100_device);
	272	err_device_put:
	273	platform_device_put(tc1100_device);
	274	return error;
dd8cd779 CC	275	}
	276
	277	static void __exit tc1100_exit(void)
	278	{
9634a627	279	platform_device_unregister(tc1100_device);
dd8cd779	280	platform_driver_unregister(&tc1100_driver);
dd8cd779 CC	281	}
	282
	283	module_init(tc1100_init);
	284	module_exit(tc1100_exit);