[GitHub/mt8127/android_kernel_alcatel_ttab.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/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 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_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 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);
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>
	30	#include <linux/init.h>
	31	#include <linux/types.h>
	32	#include <acpi/acpi.h>
dd8cd779 CC	33	#include <acpi/acpi_bus.h>
	34	#include <acpi/acpi_drivers.h>
	35	#include <linux/platform_device.h>
	36
	37	#define GUID "C364AC71-36DB-495A-8494-B439D472A505"
	38
	39	#define TC1100_INSTANCE_WIRELESS 1
	40	#define TC1100_INSTANCE_JOGDIAL 2
	41
	42	#define TC1100_LOGPREFIX "tc1100-wmi: "
	43	#define TC1100_INFO KERN_INFO TC1100_LOGPREFIX
	44
	45	MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
	46	MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
	47	MODULE_LICENSE("GPL");
	48	MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
	49
	50	static int tc1100_probe(struct platform_device *device);
	51	static int tc1100_remove(struct platform_device *device);
	52	static int tc1100_suspend(struct platform_device *device, pm_message_t state);
	53	static int tc1100_resume(struct platform_device *device);
	54
	55	static struct platform_driver tc1100_driver = {
	56	.driver = {
	57	.name = "tc1100-wmi",
	58	.owner = THIS_MODULE,
	59	},
	60	.probe = tc1100_probe,
	61	.remove = tc1100_remove,
	62	.suspend = tc1100_suspend,
	63	.resume = tc1100_resume,
	64	};
	65
	66	static struct platform_device *tc1100_device;
	67
	68	struct tc1100_data {
	69	u32 wireless;
	70	u32 jogdial;
	71	};
	72
	73	static struct tc1100_data suspend_data;
	74
	75	/* --------------------------------------------------------------------------
	76	Device Management
	77	-------------------------------------------------------------------------- */
	78
	79	static int get_state(u32 *out, u8 instance)
	80	{
	81	u32 tmp;
	82	acpi_status status;
	83	struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
	84	union acpi_object *obj;
	85
	86	if (!out)
	87	return -EINVAL;
	88
	89	if (instance > 2)
	90	return -ENODEV;
	91
	92	status = wmi_query_block(GUID, instance, &result);
	93	if (ACPI_FAILURE(status))
	94	return -ENODEV;
	95
	96	obj = (union acpi_object *) result.pointer;
07de5bdb KK	97	if (obj && obj->type == ACPI_TYPE_INTEGER) {
07de5bdb KK	98	tmp = obj->integer.value;
dd8cd779 CC	99	} else {
	100	tmp = 0;
	101	}
	102
	103	if (result.length > 0 && result.pointer)
	104	kfree(result.pointer);
	105
	106	switch (instance) {
	107	case TC1100_INSTANCE_WIRELESS:
	108	*out = (tmp == 3) ? 1 : 0;
	109	return 0;
	110	case TC1100_INSTANCE_JOGDIAL:
07de5bdb	111	*out = (tmp == 1) ? 0 : 1;
dd8cd779 CC	112	return 0;
	113	default:
	114	return -ENODEV;
	115	}
	116	}
	117
	118	static int set_state(u32 *in, u8 instance)
	119	{
	120	u32 value;
	121	acpi_status status;
	122	struct acpi_buffer input;
	123
	124	if (!in)
	125	return -EINVAL;
	126
	127	if (instance > 2)
	128	return -ENODEV;
	129
	130	switch (instance) {
	131	case TC1100_INSTANCE_WIRELESS:
	132	value = (*in) ? 1 : 2;
	133	break;
	134	case TC1100_INSTANCE_JOGDIAL:
	135	value = (*in) ? 0 : 1;
	136	break;
	137	default:
	138	return -ENODEV;
	139	}
	140
	141	input.length = sizeof(u32);
	142	input.pointer = &value;
	143
	144	status = wmi_set_block(GUID, instance, &input);
	145	if (ACPI_FAILURE(status))
	146	return -ENODEV;
	147
	148	return 0;
	149	}
	150
	151	/* --------------------------------------------------------------------------
	152	FS Interface (/sys)
	153	-------------------------------------------------------------------------- */
	154
	155	/*
	156	* Read/ write bool sysfs macro
	157	*/
	158	#define show_set_bool(value, instance) \
	159	static ssize_t \
	160	show_bool_##value(struct device dev, struct device_attribute attr, \
	161	char *buf) \
	162	{ \
	163	u32 result; \
	164	acpi_status status = get_state(&result, instance); \
	165	if (ACPI_SUCCESS(status)) \
	166	return sprintf(buf, "%d\n", result); \
	167	return sprintf(buf, "Read error\n"); \
	168	} \
	169	\
	170	static ssize_t \
	171	set_bool_##value(struct device dev, struct device_attribute attr, \
	172	const char *buf, size_t count) \
	173	{ \
	174	u32 tmp = simple_strtoul(buf, NULL, 10); \
	175	acpi_status status = set_state(&tmp, instance); \
176	if (ACPI_FAILURE(status)) \
177	return -EINVAL; \
178	return count; \
179	} \
180	static DEVICE_ATTR(value, S_IWUGO \| S_IRUGO \| S_IWUSR, \
181	show_bool_##value, set_bool_##value);
182
183	show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
184	show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
185
186	static void remove_fs(void)
187	{
188	device_remove_file(&tc1100_device->dev, &dev_attr_wireless);
189	device_remove_file(&tc1100_device->dev, &dev_attr_jogdial);
190	}
191
192	static int add_fs(void)
193	{
194	int ret;
195
196	ret = device_create_file(&tc1100_device->dev, &dev_attr_wireless);
197	if (ret)
198	goto add_sysfs_error;
199
200	ret = device_create_file(&tc1100_device->dev, &dev_attr_jogdial);
201	if (ret)
202	goto add_sysfs_error;
203
204	return ret;
205
206	add_sysfs_error:
207	remove_fs();
208	return ret;
209	}
210
211	/* --------------------------------------------------------------------------
212	Driver Model
213	-------------------------------------------------------------------------- */
214
215	static int tc1100_probe(struct platform_device *device)
216	{
217	int result = 0;
218
219	result = add_fs();
220	return result;
221	}
222
223
224	static int tc1100_remove(struct platform_device *device)
225	{
226	remove_fs();
227	return 0;
228	}
229
230	static int tc1100_suspend(struct platform_device *dev, pm_message_t state)
231	{
232	int ret;
233
234	ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
235	if (ret)
236	return ret;
237
238	ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
239	if (ret)
240	return ret;
241
242	return ret;
243	}
244
245	static int tc1100_resume(struct platform_device *dev)
246	{
247	int ret;
248
249	ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
250	if (ret)
251	return ret;
252
253	ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
254	if (ret)
255	return ret;
256
257	return ret;
258	}
259
260	static int __init tc1100_init(void)
261	{
262	int result = 0;
263
264	if (!wmi_has_guid(GUID))
265	return -ENODEV;
266
267	result = platform_driver_register(&tc1100_driver);
268	if (result)
269	return result;
270
271	tc1100_device = platform_device_alloc("tc1100-wmi", -1);
272	platform_device_add(tc1100_device);
273
274	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
275
276	return result;
277	}
278
279	static void __exit tc1100_exit(void)
280	{
281	platform_device_del(tc1100_device);
282	platform_driver_unregister(&tc1100_driver);
283
284	printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");
285	}
286
287	module_init(tc1100_init);
288	module_exit(tc1100_exit);