[deliverable/linux.git] / drivers / platform / x86 / ideapad_acpi.c

/*
 *  ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
 *
 *  Copyright © 2010 Intel Corporation
 *  Copyright © 2010 David Woodhouse <dwmw2@infradead.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 this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
#include <linux/rfkill.h>

#define IDEAPAD_DEV_CAMERA	0
#define IDEAPAD_DEV_WLAN	1
#define IDEAPAD_DEV_BLUETOOTH	2
#define IDEAPAD_DEV_3G		3
#define IDEAPAD_DEV_KILLSW	4

struct ideapad_private {
	struct rfkill *rfk[5];
};

static struct {
	char *name;
	int type;
} ideapad_rfk_data[] = {
	/* camera has no rfkill */
	{ "ideapad_wlan",	RFKILL_TYPE_WLAN },
	{ "ideapad_bluetooth",	RFKILL_TYPE_BLUETOOTH },
	{ "ideapad_3g",		RFKILL_TYPE_WWAN },
	{ "ideapad_killsw",	RFKILL_TYPE_WLAN }
};

static int ideapad_dev_exists(int device)
{
	acpi_status status;
	union acpi_object in_param;
	struct acpi_object_list input = { 1, &in_param };
	struct acpi_buffer output;
	union acpi_object out_obj;

	output.length = sizeof(out_obj);
	output.pointer = &out_obj;

	in_param.type = ACPI_TYPE_INTEGER;
	in_param.integer.value = device + 1;

	status = acpi_evaluate_object(NULL, "\\_SB_.DECN", &input, &output);
	if (ACPI_FAILURE(status)) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method failed %d. Is this an IdeaPAD?\n", status);
		return -ENODEV;
	}
	if (out_obj.type != ACPI_TYPE_INTEGER) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method returned unexpected type\n");
		return -ENODEV;
	}
	return out_obj.integer.value;
}

static int ideapad_dev_get_state(int device)
{
	acpi_status status;
	union acpi_object in_param;
	struct acpi_object_list input = { 1, &in_param };
	struct acpi_buffer output;
	union acpi_object out_obj;

	output.length = sizeof(out_obj);
	output.pointer = &out_obj;

	in_param.type = ACPI_TYPE_INTEGER;
	in_param.integer.value = device + 1;

	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
	if (ACPI_FAILURE(status)) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
		return -ENODEV;
	}
	if (out_obj.type != ACPI_TYPE_INTEGER) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
		return -ENODEV;
	}
	return out_obj.integer.value;
}

static int ideapad_dev_set_state(int device, int state)
{
	acpi_status status;
	union acpi_object in_params[2];
	struct acpi_object_list input = { 2, in_params };

	in_params[0].type = ACPI_TYPE_INTEGER;
	in_params[0].integer.value = device + 1;
	in_params[1].type = ACPI_TYPE_INTEGER;
	in_params[1].integer.value = state;

	status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
	if (ACPI_FAILURE(status)) {
		printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
		return -ENODEV;
	}
	return 0;
}
static ssize_t show_ideapad_cam(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA);
	if (state < 0)
		return state;

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

static ssize_t store_ideapad_cam(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	int ret, state;

	if (!count)
		return 0;
	if (sscanf(buf, "%i", &state) != 1)
		return -EINVAL;
	ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state);
	if (ret < 0)
		return ret;
	return count;
}

static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);

static int ideapad_rfk_set(void *data, bool blocked)
{
	int device = (unsigned long)data;

	if (device == IDEAPAD_DEV_KILLSW)
		return -EINVAL;
	return ideapad_dev_set_state(device, !blocked);
}

static struct rfkill_ops ideapad_rfk_ops = {
	.set_block = ideapad_rfk_set,
};

static void ideapad_sync_rfk_state(struct acpi_device *adevice)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
	int i;

	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
		if (priv->rfk[i])
			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
	if (hw_blocked)
		return;

	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
		if (priv->rfk[i])
			rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
}

static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int ret;

	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
				      ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
				      (void *)(long)dev);
	if (!priv->rfk[dev])
		return -ENOMEM;

	ret = rfkill_register(priv->rfk[dev]);
	if (ret) {
		rfkill_destroy(priv->rfk[dev]);
		return ret;
	}
	return 0;
}

static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);

	if (!priv->rfk[dev])
		return;

	rfkill_unregister(priv->rfk[dev]);
	rfkill_destroy(priv->rfk[dev]);
}

static const struct acpi_device_id ideapad_device_ids[] = {
	{ "VPC2004", 0},
	{ "", 0},
};
MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);

static int ideapad_acpi_add(struct acpi_device *adevice)
{
	int i;
	int devs_present[5];
	struct ideapad_private *priv;

	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
		devs_present[i] = ideapad_dev_exists(i);
		if (devs_present[i] < 0)
			return devs_present[i];
	}

	/* The hardware switch is always present */
	devs_present[IDEAPAD_DEV_KILLSW] = 1;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	if (devs_present[IDEAPAD_DEV_CAMERA]) {
		int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
		if (ret) {
			kfree(priv);
			return ret;
		}
	}

	dev_set_drvdata(&adevice->dev, priv);
	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
		if (!devs_present[i])
			continue;

		ideapad_register_rfkill(adevice, i);
	}
	ideapad_sync_rfk_state(adevice);
	return 0;
}

static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
{
	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	int i;

	device_remove_file(&adevice->dev, &dev_attr_camera_power);

	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
		ideapad_unregister_rfkill(adevice, i);

	dev_set_drvdata(&adevice->dev, NULL);
	kfree(priv);
	return 0;
}

static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
{
	ideapad_sync_rfk_state(adevice);
}

static struct acpi_driver ideapad_acpi_driver = {
	.name = "ideapad_acpi",
	.class = "IdeaPad",
	.ids = ideapad_device_ids,
	.ops.add = ideapad_acpi_add,
	.ops.remove = ideapad_acpi_remove,
	.ops.notify = ideapad_acpi_notify,
	.owner = THIS_MODULE,
};


static int __init ideapad_acpi_module_init(void)
{
	acpi_bus_register_driver(&ideapad_acpi_driver);

	return 0;
}


static void __exit ideapad_acpi_module_exit(void)
{
	acpi_bus_unregister_driver(&ideapad_acpi_driver);

}

MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
MODULE_LICENSE("GPL");

module_init(ideapad_acpi_module_init);
module_exit(ideapad_acpi_module_exit);
Commit	Line	Data
58ac7aa0 DW	1	/*
	2	* ideapad_acpi.c - Lenovo IdeaPad ACPI Extras
	3	*
	4	* Copyright © 2010 Intel Corporation
	5	* Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	20	* 02110-1301, USA.
	21	*/
	22
	23	#include <linux/kernel.h>
	24	#include <linux/module.h>
	25	#include <linux/init.h>
	26	#include <linux/types.h>
	27	#include <acpi/acpi_bus.h>
	28	#include <acpi/acpi_drivers.h>
	29	#include <linux/rfkill.h>
	30
	31	#define IDEAPAD_DEV_CAMERA 0
	32	#define IDEAPAD_DEV_WLAN 1
	33	#define IDEAPAD_DEV_BLUETOOTH 2
	34	#define IDEAPAD_DEV_3G 3
	35	#define IDEAPAD_DEV_KILLSW 4
	36
ce326329 DW	37	struct ideapad_private {
ce326329 DW	38	struct rfkill *rfk[5];
58ac7aa0	39	};
ce326329 DW	40
	41	static struct {
	42	char *name;
	43	int type;
	44	} ideapad_rfk_data[] = {
	45	/* camera has no rfkill */
	46	{ "ideapad_wlan", RFKILL_TYPE_WLAN },
	47	{ "ideapad_bluetooth", RFKILL_TYPE_BLUETOOTH },
	48	{ "ideapad_3g", RFKILL_TYPE_WWAN },
	49	{ "ideapad_killsw", RFKILL_TYPE_WLAN }
58ac7aa0 DW	50	};
	51
	52	static int ideapad_dev_exists(int device)
	53	{
	54	acpi_status status;
	55	union acpi_object in_param;
	56	struct acpi_object_list input = { 1, &in_param };
	57	struct acpi_buffer output;
	58	union acpi_object out_obj;
	59
	60	output.length = sizeof(out_obj);
	61	output.pointer = &out_obj;
	62
	63	in_param.type = ACPI_TYPE_INTEGER;
	64	in_param.integer.value = device + 1;
	65
	66	status = acpi_evaluate_object(NULL, "\\_SB_.DECN", &input, &output);
	67	if (ACPI_FAILURE(status)) {
	68	printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method failed %d. Is this an IdeaPAD?\n", status);
	69	return -ENODEV;
	70	}
	71	if (out_obj.type != ACPI_TYPE_INTEGER) {
	72	printk(KERN_WARNING "IdeaPAD \\_SB_.DECN method returned unexpected type\n");
	73	return -ENODEV;
	74	}
	75	return out_obj.integer.value;
	76	}
	77
	78	static int ideapad_dev_get_state(int device)
	79	{
	80	acpi_status status;
	81	union acpi_object in_param;
	82	struct acpi_object_list input = { 1, &in_param };
	83	struct acpi_buffer output;
	84	union acpi_object out_obj;
	85
	86	output.length = sizeof(out_obj);
	87	output.pointer = &out_obj;
	88
	89	in_param.type = ACPI_TYPE_INTEGER;
	90	in_param.integer.value = device + 1;
	91
	92	status = acpi_evaluate_object(NULL, "\\_SB_.GECN", &input, &output);
	93	if (ACPI_FAILURE(status)) {
	94	printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method failed %d\n", status);
	95	return -ENODEV;
	96	}
	97	if (out_obj.type != ACPI_TYPE_INTEGER) {
	98	printk(KERN_WARNING "IdeaPAD \\_SB_.GECN method returned unexpected type\n");
	99	return -ENODEV;
	100	}
	101	return out_obj.integer.value;
	102	}
	103
	104	static int ideapad_dev_set_state(int device, int state)
	105	{
	106	acpi_status status;
	107	union acpi_object in_params[2];
	108	struct acpi_object_list input = { 2, in_params };
	109
	110	in_params[0].type = ACPI_TYPE_INTEGER;
	111	in_params[0].integer.value = device + 1;
	112	in_params[1].type = ACPI_TYPE_INTEGER;
	113	in_params[1].integer.value = state;
114
115	status = acpi_evaluate_object(NULL, "\\_SB_.SECN", &input, NULL);
116	if (ACPI_FAILURE(status)) {
117	printk(KERN_WARNING "IdeaPAD \\_SB_.SECN method failed %d\n", status);
118	return -ENODEV;
119	}
120	return 0;
121	}
122	static ssize_t show_ideapad_cam(struct device *dev,
123	struct device_attribute *attr,
124	char *buf)
125	{
126	int state = ideapad_dev_get_state(IDEAPAD_DEV_CAMERA);
127	if (state < 0)
128	return state;
129
130	return sprintf(buf, "%d\n", state);
131	}
132
133	static ssize_t store_ideapad_cam(struct device *dev,
134	struct device_attribute *attr,
135	const char *buf, size_t count)
136	{
137	int ret, state;
138
139	if (!count)
140	return 0;
141	if (sscanf(buf, "%i", &state) != 1)
142	return -EINVAL;
2016e4a0	143	ret = ideapad_dev_set_state(IDEAPAD_DEV_CAMERA, !!state);
58ac7aa0 DW	144	if (ret < 0)
	145	return ret;
	146	return count;
	147	}
	148
	149	static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
	150
	151	static int ideapad_rfk_set(void *data, bool blocked)
	152	{
	153	int device = (unsigned long)data;
	154
	155	if (device == IDEAPAD_DEV_KILLSW)
	156	return -EINVAL;
	157	return ideapad_dev_set_state(device, !blocked);
	158	}
	159
	160	static struct rfkill_ops ideapad_rfk_ops = {
	161	.set_block = ideapad_rfk_set,
	162	};
	163
ce326329	164	static void ideapad_sync_rfk_state(struct acpi_device *adevice)
58ac7aa0	165	{
ce326329	166	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0 DW	167	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);
	168	int i;
	169
ce326329	170	rfkill_set_hw_state(priv->rfk[IDEAPAD_DEV_KILLSW], hw_blocked);
58ac7aa0	171	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
ce326329 DW	172	if (priv->rfk[i])
ce326329 DW	173	rfkill_set_hw_state(priv->rfk[i], hw_blocked);
58ac7aa0 DW	174	if (hw_blocked)
	175	return;
	176
	177	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)
ce326329 DW	178	if (priv->rfk[i])
ce326329 DW	179	rfkill_set_sw_state(priv->rfk[i], !ideapad_dev_get_state(i));
58ac7aa0 DW	180	}
58ac7aa0 DW	181
ce326329	182	static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	183	{
ce326329	184	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0 DW	185	int ret;
58ac7aa0 DW	186
ce326329 DW	187	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev-1].name, &adevice->dev,
	188	ideapad_rfk_data[dev-1].type, &ideapad_rfk_ops,
	189	(void *)(long)dev);
	190	if (!priv->rfk[dev])
58ac7aa0 DW	191	return -ENOMEM;
58ac7aa0 DW	192
ce326329	193	ret = rfkill_register(priv->rfk[dev]);
58ac7aa0	194	if (ret) {
ce326329	195	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	196	return ret;
	197	}
	198	return 0;
	199	}
	200
ce326329	201	static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	202	{
ce326329 DW	203	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	204
	205	if (!priv->rfk[dev])
58ac7aa0 DW	206	return;
58ac7aa0 DW	207
ce326329 DW	208	rfkill_unregister(priv->rfk[dev]);
ce326329 DW	209	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	210	}
	211
	212	static const struct acpi_device_id ideapad_device_ids[] = {
	213	{ "VPC2004", 0},
	214	{ "", 0},
	215	};
	216	MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
	217
ce326329	218	static int ideapad_acpi_add(struct acpi_device *adevice)
58ac7aa0 DW	219	{
	220	int i;
	221	int devs_present[5];
ce326329	222	struct ideapad_private *priv;
58ac7aa0 DW	223
	224	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
	225	devs_present[i] = ideapad_dev_exists(i);
	226	if (devs_present[i] < 0)
	227	return devs_present[i];
	228	}
	229
	230	/* The hardware switch is always present */
	231	devs_present[IDEAPAD_DEV_KILLSW] = 1;
	232
ce326329 DW	233	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	234	if (!priv)
	235	return -ENOMEM;
	236
58ac7aa0	237	if (devs_present[IDEAPAD_DEV_CAMERA]) {
ce326329 DW	238	int ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
	239	if (ret) {
	240	kfree(priv);
58ac7aa0	241	return ret;
ce326329	242	}
58ac7aa0 DW	243	}
58ac7aa0 DW	244
ce326329	245	dev_set_drvdata(&adevice->dev, priv);
58ac7aa0 DW	246	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
	247	if (!devs_present[i])
	248	continue;
	249
ce326329	250	ideapad_register_rfkill(adevice, i);
58ac7aa0	251	}
ce326329	252	ideapad_sync_rfk_state(adevice);
58ac7aa0 DW	253	return 0;
	254	}
	255
ce326329	256	static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
58ac7aa0	257	{
ce326329	258	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	259	int i;
ce326329 DW	260
	261	device_remove_file(&adevice->dev, &dev_attr_camera_power);
	262
	263	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
	264	ideapad_unregister_rfkill(adevice, i);
	265
	266	dev_set_drvdata(&adevice->dev, NULL);
	267	kfree(priv);
58ac7aa0 DW	268	return 0;
	269	}
	270
ce326329	271	static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
58ac7aa0	272	{
ce326329	273	ideapad_sync_rfk_state(adevice);
58ac7aa0 DW	274	}
	275
	276	static struct acpi_driver ideapad_acpi_driver = {
	277	.name = "ideapad_acpi",
	278	.class = "IdeaPad",
	279	.ids = ideapad_device_ids,
	280	.ops.add = ideapad_acpi_add,
	281	.ops.remove = ideapad_acpi_remove,
	282	.ops.notify = ideapad_acpi_notify,
	283	.owner = THIS_MODULE,
	284	};
	285
	286
	287	static int __init ideapad_acpi_module_init(void)
	288	{
	289	acpi_bus_register_driver(&ideapad_acpi_driver);
	290
	291	return 0;
	292	}
	293
	294
	295	static void __exit ideapad_acpi_module_exit(void)
	296	{
	297	acpi_bus_unregister_driver(&ideapad_acpi_driver);
	298
	299	}
	300
	301	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	302	MODULE_DESCRIPTION("IdeaPad ACPI Extras");
	303	MODULE_LICENSE("GPL");
	304
	305	module_init(ideapad_acpi_module_init);
	306	module_exit(ideapad_acpi_module_exit);