[linux-2.6-block.git] / drivers / platform / x86 / ideapad-laptop.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>
#include <linux/platform_device.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 {
	acpi_handle handle;
	struct rfkill *rfk[5];
	struct platform_device *platform_device;
} *ideapad_priv;

static struct {
	char *name;
	int cfgbit;
	int opcode;
	int type;
} ideapad_rfk_data[] = {
	{ "ideapad_camera",	19, 0x1E, NUM_RFKILL_TYPES },
	{ "ideapad_wlan",	18, 0x15, RFKILL_TYPE_WLAN },
	{ "ideapad_bluetooth",	16, 0x17, RFKILL_TYPE_BLUETOOTH },
	{ "ideapad_3g",		17, 0x20, RFKILL_TYPE_WWAN },
	{ "ideapad_killsw",	0,  0,    RFKILL_TYPE_WLAN }
};

static bool no_bt_rfkill;
module_param(no_bt_rfkill, bool, 0444);
MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");

/*
 * ACPI Helpers
 */
#define IDEAPAD_EC_TIMEOUT (100) /* in ms */

static int read_method_int(acpi_handle handle, const char *method, int *val)
{
	acpi_status status;
	unsigned long long result;

	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	if (ACPI_FAILURE(status)) {
		*val = -1;
		return -1;
	} else {
		*val = result;
		return 0;
	}
}

static int method_vpcr(acpi_handle handle, int cmd, int *ret)
{
	acpi_status status;
	unsigned long long result;
	struct acpi_object_list params;
	union acpi_object in_obj;

	params.count = 1;
	params.pointer = &in_obj;
	in_obj.type = ACPI_TYPE_INTEGER;
	in_obj.integer.value = cmd;

	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);

	if (ACPI_FAILURE(status)) {
		*ret = -1;
		return -1;
	} else {
		*ret = result;
		return 0;
	}
}

static int method_vpcw(acpi_handle handle, int cmd, int data)
{
	struct acpi_object_list params;
	union acpi_object in_obj[2];
	acpi_status status;

	params.count = 2;
	params.pointer = in_obj;
	in_obj[0].type = ACPI_TYPE_INTEGER;
	in_obj[0].integer.value = cmd;
	in_obj[1].type = ACPI_TYPE_INTEGER;
	in_obj[1].integer.value = data;

	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	if (status != AE_OK)
		return -1;
	return 0;
}

static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
{
	int val;
	unsigned long int end_jiffies;

	if (method_vpcw(handle, 1, cmd))
		return -1;

	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	     time_before(jiffies, end_jiffies);) {
		schedule();
		if (method_vpcr(handle, 1, &val))
			return -1;
		if (val == 0) {
			if (method_vpcr(handle, 0, &val))
				return -1;
			*data = val;
			return 0;
		}
	}
	pr_err("timeout in read_ec_cmd\n");
	return -1;
}

static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
{
	int val;
	unsigned long int end_jiffies;

	if (method_vpcw(handle, 0, data))
		return -1;
	if (method_vpcw(handle, 1, cmd))
		return -1;

	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
	     time_before(jiffies, end_jiffies);) {
		schedule();
		if (method_vpcr(handle, 1, &val))
			return -1;
		if (val == 0)
			return 0;
	}
	pr_err("timeout in write_ec_cmd\n");
	return -1;
}
/* the above is ACPI helpers */

static ssize_t show_ideapad_cam(struct device *dev,
				struct device_attribute *attr,
				char *buf)
{
	struct ideapad_private *priv = dev_get_drvdata(dev);
	acpi_handle handle = priv->handle;
	unsigned long result;

	if (read_ec_data(handle, 0x1D, &result))
		return sprintf(buf, "-1\n");
	return sprintf(buf, "%lu\n", result);
}

static ssize_t store_ideapad_cam(struct device *dev,
				 struct device_attribute *attr,
				 const char *buf, size_t count)
{
	struct ideapad_private *priv = dev_get_drvdata(dev);
	acpi_handle handle = priv->handle;
	int ret, state;

	if (!count)
		return 0;
	if (sscanf(buf, "%i", &state) != 1)
		return -EINVAL;
	ret = write_ec_cmd(handle, 0x1E, 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 write_ec_cmd(ideapad_priv->handle,
			    ideapad_rfk_data[device].opcode,
			    !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);
	acpi_handle handle = priv->handle;
	unsigned long hw_blocked;
	int i;

	if (read_ec_data(handle, 0x23, &hw_blocked))
		return;
	hw_blocked = !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);
}

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

	if (no_bt_rfkill &&
	    (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
		/* Force to enable bluetooth when no_bt_rfkill=1 */
		write_ec_cmd(ideapad_priv->handle,
			     ideapad_rfk_data[dev].opcode, 1);
		return 0;
	}

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

	if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
			 &sw_blocked)) {
		rfkill_init_sw_state(priv->rfk[dev], 0);
	} else {
		sw_blocked = !sw_blocked;
		rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
	}

	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]);
}

/*
 * Platform device
 */
static int __devinit ideapad_platform_init(void)
{
	int result;

	ideapad_priv->platform_device = platform_device_alloc("ideapad", -1);
	if (!ideapad_priv->platform_device)
		return -ENOMEM;
	platform_set_drvdata(ideapad_priv->platform_device, ideapad_priv);

	result = platform_device_add(ideapad_priv->platform_device);
	if (result)
		goto fail_platform_device;

	return 0;

fail_platform_device:
	platform_device_put(ideapad_priv->platform_device);
	return result;
}

static void ideapad_platform_exit(void)
{
	platform_device_unregister(ideapad_priv->platform_device);
}
/* the above is platform device */

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 ret, i, cfg;
	int devs_present[5];
	struct ideapad_private *priv;

	if (read_method_int(adevice->handle, "_CFG", &cfg))
		return -ENODEV;

	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
		if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
			devs_present[i] = 1;
		else
			devs_present[i] = 0;
	}

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

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

	ret = ideapad_platform_init();
	if (ret)
		goto platform_failed;

	if (devs_present[IDEAPAD_DEV_CAMERA]) {
		ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
		if (ret)
			goto camera_failed;
	}

	priv->handle = adevice->handle;
	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;

camera_failed:
	ideapad_platform_exit();
platform_failed:
	kfree(priv);
	return ret;
}

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);

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

static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
{
	acpi_handle handle = adevice->handle;
	unsigned long vpc1, vpc2, vpc_bit;

	if (read_ec_data(handle, 0x10, &vpc1))
		return;
	if (read_ec_data(handle, 0x1A, &vpc2))
		return;

	vpc1 = (vpc2 << 8) | vpc1;
	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
		if (test_bit(vpc_bit, &vpc1)) {
			if (vpc_bit == 9)
				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>
98ee6919	30	#include <linux/platform_device.h>
58ac7aa0 DW	31
	32	#define IDEAPAD_DEV_CAMERA 0
	33	#define IDEAPAD_DEV_WLAN 1
	34	#define IDEAPAD_DEV_BLUETOOTH 2
	35	#define IDEAPAD_DEV_3G 3
	36	#define IDEAPAD_DEV_KILLSW 4
	37
ce326329	38	struct ideapad_private {
26c81d5c	39	acpi_handle handle;
ce326329	40	struct rfkill *rfk[5];
98ee6919	41	struct platform_device *platform_device;
fa08359e	42	} *ideapad_priv;
ce326329 DW	43
	44	static struct {
	45	char *name;
dfa7f6fe	46	int cfgbit;
fa08359e	47	int opcode;
ce326329 DW	48	int type;
ce326329 DW	49	} ideapad_rfk_data[] = {
fa08359e IP	50	{ "ideapad_camera", 19, 0x1E, NUM_RFKILL_TYPES },
	51	{ "ideapad_wlan", 18, 0x15, RFKILL_TYPE_WLAN },
	52	{ "ideapad_bluetooth", 16, 0x17, RFKILL_TYPE_BLUETOOTH },
	53	{ "ideapad_3g", 17, 0x20, RFKILL_TYPE_WWAN },
	54	{ "ideapad_killsw", 0, 0, RFKILL_TYPE_WLAN }
58ac7aa0 DW	55	};
58ac7aa0 DW	56
bfa97b7d IP	57	static bool no_bt_rfkill;
	58	module_param(no_bt_rfkill, bool, 0444);
	59	MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
	60
6a09f21d IP	61	/*
	62	* ACPI Helpers
	63	*/
	64	#define IDEAPAD_EC_TIMEOUT (100) /* in ms */
	65
	66	static int read_method_int(acpi_handle handle, const char method, int val)
	67	{
	68	acpi_status status;
	69	unsigned long long result;
	70
	71	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
	72	if (ACPI_FAILURE(status)) {
	73	*val = -1;
	74	return -1;
	75	} else {
	76	*val = result;
	77	return 0;
	78	}
	79	}
	80
	81	static int method_vpcr(acpi_handle handle, int cmd, int *ret)
	82	{
	83	acpi_status status;
	84	unsigned long long result;
	85	struct acpi_object_list params;
	86	union acpi_object in_obj;
	87
	88	params.count = 1;
	89	params.pointer = &in_obj;
	90	in_obj.type = ACPI_TYPE_INTEGER;
	91	in_obj.integer.value = cmd;
	92
	93	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
	94
	95	if (ACPI_FAILURE(status)) {
	96	*ret = -1;
	97	return -1;
	98	} else {
	99	*ret = result;
	100	return 0;
	101	}
	102	}
	103
	104	static int method_vpcw(acpi_handle handle, int cmd, int data)
	105	{
	106	struct acpi_object_list params;
	107	union acpi_object in_obj[2];
	108	acpi_status status;
	109
	110	params.count = 2;
	111	params.pointer = in_obj;
	112	in_obj[0].type = ACPI_TYPE_INTEGER;
	113	in_obj[0].integer.value = cmd;
	114	in_obj[1].type = ACPI_TYPE_INTEGER;
	115	in_obj[1].integer.value = data;
	116
	117	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
	118	if (status != AE_OK)
	119	return -1;
	120	return 0;
	121	}
	122
	123	static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
	124	{
125	int val;
126	unsigned long int end_jiffies;
127
128	if (method_vpcw(handle, 1, cmd))
129	return -1;
130
131	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
132	time_before(jiffies, end_jiffies);) {
133	schedule();
134	if (method_vpcr(handle, 1, &val))
135	return -1;
136	if (val == 0) {
137	if (method_vpcr(handle, 0, &val))
138	return -1;
139	*data = val;
140	return 0;
141	}
142	}
143	pr_err("timeout in read_ec_cmd\n");
144	return -1;
145	}
146
147	static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
148	{
149	int val;
150	unsigned long int end_jiffies;
151
152	if (method_vpcw(handle, 0, data))
153	return -1;
154	if (method_vpcw(handle, 1, cmd))
155	return -1;
156
157	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
158	time_before(jiffies, end_jiffies);) {
159	schedule();
160	if (method_vpcr(handle, 1, &val))
161	return -1;
162	if (val == 0)
163	return 0;
164	}
165	pr_err("timeout in write_ec_cmd\n");
166	return -1;
167	}
168	/* the above is ACPI helpers */
169
58ac7aa0 DW	170	static ssize_t show_ideapad_cam(struct device *dev,
	171	struct device_attribute *attr,
	172	char *buf)
	173	{
26c81d5c IP	174	struct ideapad_private *priv = dev_get_drvdata(dev);
	175	acpi_handle handle = priv->handle;
	176	unsigned long result;
58ac7aa0	177
26c81d5c IP	178	if (read_ec_data(handle, 0x1D, &result))
	179	return sprintf(buf, "-1\n");
	180	return sprintf(buf, "%lu\n", result);
58ac7aa0 DW	181	}
	182
	183	static ssize_t store_ideapad_cam(struct device *dev,
	184	struct device_attribute *attr,
	185	const char *buf, size_t count)
	186	{
26c81d5c IP	187	struct ideapad_private *priv = dev_get_drvdata(dev);
26c81d5c IP	188	acpi_handle handle = priv->handle;
58ac7aa0 DW	189	int ret, state;
	190
	191	if (!count)
	192	return 0;
	193	if (sscanf(buf, "%i", &state) != 1)
	194	return -EINVAL;
26c81d5c	195	ret = write_ec_cmd(handle, 0x1E, state);
58ac7aa0 DW	196	if (ret < 0)
	197	return ret;
	198	return count;
	199	}
	200
	201	static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
	202
	203	static int ideapad_rfk_set(void *data, bool blocked)
	204	{
	205	int device = (unsigned long)data;
	206
	207	if (device == IDEAPAD_DEV_KILLSW)
	208	return -EINVAL;
fa08359e IP	209
	210	return write_ec_cmd(ideapad_priv->handle,
	211	ideapad_rfk_data[device].opcode,
	212	!blocked);
58ac7aa0 DW	213	}
	214
	215	static struct rfkill_ops ideapad_rfk_ops = {
	216	.set_block = ideapad_rfk_set,
	217	};
	218
ce326329	219	static void ideapad_sync_rfk_state(struct acpi_device *adevice)
58ac7aa0	220	{
ce326329	221	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
2b7266bd IP	222	acpi_handle handle = priv->handle;
2b7266bd IP	223	unsigned long hw_blocked;
58ac7aa0 DW	224	int i;
58ac7aa0 DW	225
2b7266bd	226	if (read_ec_data(handle, 0x23, &hw_blocked))
58ac7aa0	227	return;
2b7266bd	228	hw_blocked = !hw_blocked;
58ac7aa0	229
2b7266bd	230	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
ce326329	231	if (priv->rfk[i])
2b7266bd	232	rfkill_set_hw_state(priv->rfk[i], hw_blocked);
58ac7aa0 DW	233	}
58ac7aa0 DW	234
ce326329	235	static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	236	{
ce326329	237	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	238	int ret;
2b7266bd	239	unsigned long sw_blocked;
58ac7aa0	240
bfa97b7d IP	241	if (no_bt_rfkill &&
	242	(ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
	243	/* Force to enable bluetooth when no_bt_rfkill=1 */
	244	write_ec_cmd(ideapad_priv->handle,
	245	ideapad_rfk_data[dev].opcode, 1);
	246	return 0;
	247	}
	248
2b7266bd IP	249	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
2b7266bd IP	250	ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
ce326329 DW	251	(void *)(long)dev);
ce326329 DW	252	if (!priv->rfk[dev])
58ac7aa0 DW	253	return -ENOMEM;
58ac7aa0 DW	254
2b7266bd IP	255	if (read_ec_data(ideapad_priv->handle, ideapad_rfk_data[dev].opcode-1,
	256	&sw_blocked)) {
	257	rfkill_init_sw_state(priv->rfk[dev], 0);
	258	} else {
	259	sw_blocked = !sw_blocked;
	260	rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
	261	}
	262
ce326329	263	ret = rfkill_register(priv->rfk[dev]);
58ac7aa0	264	if (ret) {
ce326329	265	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	266	return ret;
	267	}
	268	return 0;
	269	}
	270
ce326329	271	static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
58ac7aa0	272	{
ce326329 DW	273	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
	274
	275	if (!priv->rfk[dev])
58ac7aa0 DW	276	return;
58ac7aa0 DW	277
ce326329 DW	278	rfkill_unregister(priv->rfk[dev]);
ce326329 DW	279	rfkill_destroy(priv->rfk[dev]);
58ac7aa0 DW	280	}
58ac7aa0 DW	281
98ee6919 IP	282	/*
	283	* Platform device
	284	*/
	285	static int __devinit ideapad_platform_init(void)
	286	{
	287	int result;
	288
	289	ideapad_priv->platform_device = platform_device_alloc("ideapad", -1);
	290	if (!ideapad_priv->platform_device)
	291	return -ENOMEM;
	292	platform_set_drvdata(ideapad_priv->platform_device, ideapad_priv);
	293
	294	result = platform_device_add(ideapad_priv->platform_device);
	295	if (result)
	296	goto fail_platform_device;
	297
	298	return 0;
	299
	300	fail_platform_device:
	301	platform_device_put(ideapad_priv->platform_device);
	302	return result;
	303	}
	304
	305	static void ideapad_platform_exit(void)
	306	{
	307	platform_device_unregister(ideapad_priv->platform_device);
	308	}
	309	/* the above is platform device */
	310
58ac7aa0 DW	311	static const struct acpi_device_id ideapad_device_ids[] = {
	312	{ "VPC2004", 0},
	313	{ "", 0},
	314	};
	315	MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
	316
ce326329	317	static int ideapad_acpi_add(struct acpi_device *adevice)
58ac7aa0	318	{
98ee6919	319	int ret, i, cfg;
58ac7aa0	320	int devs_present[5];
ce326329	321	struct ideapad_private *priv;
58ac7aa0	322
6f8371c0 IP	323	if (read_method_int(adevice->handle, "_CFG", &cfg))
	324	return -ENODEV;
	325
58ac7aa0	326	for (i = IDEAPAD_DEV_CAMERA; i < IDEAPAD_DEV_KILLSW; i++) {
dfa7f6fe IP	327	if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
	328	devs_present[i] = 1;
	329	else
	330	devs_present[i] = 0;
58ac7aa0 DW	331	}
	332
	333	/* The hardware switch is always present */
	334	devs_present[IDEAPAD_DEV_KILLSW] = 1;
	335
ce326329 DW	336	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	337	if (!priv)
	338	return -ENOMEM;
98ee6919 IP	339	ideapad_priv = priv;
	340
	341	ret = ideapad_platform_init();
	342	if (ret)
	343	goto platform_failed;
ce326329	344
58ac7aa0	345	if (devs_present[IDEAPAD_DEV_CAMERA]) {
98ee6919 IP	346	ret = device_create_file(&adevice->dev, &dev_attr_camera_power);
	347	if (ret)
	348	goto camera_failed;
58ac7aa0 DW	349	}
58ac7aa0 DW	350
26c81d5c	351	priv->handle = adevice->handle;
ce326329	352	dev_set_drvdata(&adevice->dev, priv);
58ac7aa0 DW	353	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {
	354	if (!devs_present[i])
	355	continue;
	356
ce326329	357	ideapad_register_rfkill(adevice, i);
58ac7aa0	358	}
ce326329	359	ideapad_sync_rfk_state(adevice);
58ac7aa0	360	return 0;
98ee6919 IP	361
	362	camera_failed:
	363	ideapad_platform_exit();
	364	platform_failed:
	365	kfree(priv);
	366	return ret;
58ac7aa0 DW	367	}
58ac7aa0 DW	368
ce326329	369	static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
58ac7aa0	370	{
ce326329	371	struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
58ac7aa0	372	int i;
ce326329 DW	373
	374	device_remove_file(&adevice->dev, &dev_attr_camera_power);
	375
	376	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++)
	377	ideapad_unregister_rfkill(adevice, i);
	378
98ee6919	379	ideapad_platform_exit();
ce326329 DW	380	dev_set_drvdata(&adevice->dev, NULL);
ce326329 DW	381	kfree(priv);
58ac7aa0 DW	382	return 0;
	383	}
	384
ce326329	385	static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
58ac7aa0	386	{
8e7d3543 IP	387	acpi_handle handle = adevice->handle;
	388	unsigned long vpc1, vpc2, vpc_bit;
	389
	390	if (read_ec_data(handle, 0x10, &vpc1))
	391	return;
	392	if (read_ec_data(handle, 0x1A, &vpc2))
	393	return;
	394
	395	vpc1 = (vpc2 << 8) \| vpc1;
	396	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
	397	if (test_bit(vpc_bit, &vpc1)) {
	398	if (vpc_bit == 9)
	399	ideapad_sync_rfk_state(adevice);
	400	}
	401	}
58ac7aa0 DW	402	}
	403
	404	static struct acpi_driver ideapad_acpi_driver = {
	405	.name = "ideapad_acpi",
	406	.class = "IdeaPad",
	407	.ids = ideapad_device_ids,
	408	.ops.add = ideapad_acpi_add,
	409	.ops.remove = ideapad_acpi_remove,
	410	.ops.notify = ideapad_acpi_notify,
	411	.owner = THIS_MODULE,
	412	};
	413
	414
	415	static int __init ideapad_acpi_module_init(void)
	416	{
	417	acpi_bus_register_driver(&ideapad_acpi_driver);
	418
	419	return 0;
	420	}
	421
	422
	423	static void __exit ideapad_acpi_module_exit(void)
	424	{
	425	acpi_bus_unregister_driver(&ideapad_acpi_driver);
	426
	427	}
	428
	429	MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
	430	MODULE_DESCRIPTION("IdeaPad ACPI Extras");
	431	MODULE_LICENSE("GPL");
	432
	433	module_init(ideapad_acpi_module_init);
	434	module_exit(ideapad_acpi_module_exit);