Commit 58ac7aa0 authored by David Woodhouse's avatar David Woodhouse
Browse files

Add Lenovo ideapad driver 



Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent f6cec0ae

drivers/platform/x86/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -219,6 +219,13 @@ config SONYPI_COMPAT 
	  ---help---

	  Build the sonypi driver compatibility code into the sony-laptop driver.



config IDEAPAD_ACPI

	tristate "Lenovo IdeaPad ACPI Laptop Extras"

	depends on ACPI

	depends on RFKILL

	help

	  This is a driver for the rfkill switches on Lenovo IdeaPad netbooks.



config THINKPAD_ACPI

	tristate "ThinkPad ACPI Laptop Extras"

	depends on ACPI

drivers/platform/x86/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ obj-$(CONFIG_ACERHDF) += acerhdf.o 
obj-$(CONFIG_HP_WMI)		+= hp-wmi.o

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

obj-$(CONFIG_SONY_LAPTOP)	+= sony-laptop.o

obj-$(CONFIG_IDEAPAD_ACPI)	+= ideapad_acpi.o

obj-$(CONFIG_THINKPAD_ACPI)	+= thinkpad_acpi.o

obj-$(CONFIG_FUJITSU_LAPTOP)	+= fujitsu-laptop.o

obj-$(CONFIG_PANASONIC_LAPTOP)	+= panasonic-laptop.o

drivers/platform/x86/ideapad_acpi.c

0 → 100644
+282 −0
Original line number Diff line number Diff line 
/*

 *  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



static struct rfkill *ideapad_rfkill[5];



static const char *ideapad_rfk_names[] = {

	"ideapad_camera", "ideapad_wlan", "ideapad_bluetooth", "ideapad_3g", "ideapad_rfkill"

};

static const int ideapad_rfk_types[] = {

	0, RFKILL_TYPE_WLAN, RFKILL_TYPE_BLUETOOTH, RFKILL_TYPE_WWAN, 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(void)

{

	int hw_blocked = !ideapad_dev_get_state(IDEAPAD_DEV_KILLSW);

	int i;



	rfkill_set_hw_state(ideapad_rfkill[IDEAPAD_DEV_KILLSW], hw_blocked);

	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)

		if (ideapad_rfkill[i])

			rfkill_set_hw_state(ideapad_rfkill[i], hw_blocked);

	if (hw_blocked)

		return;



	for (i = IDEAPAD_DEV_WLAN; i < IDEAPAD_DEV_KILLSW; i++)

		if (ideapad_rfkill[i])

			rfkill_set_sw_state(ideapad_rfkill[i], !ideapad_dev_get_state(i));

}



static int ideapad_register_rfkill(struct acpi_device *device, int dev)

{

	int ret;



	ideapad_rfkill[dev] = rfkill_alloc(ideapad_rfk_names[dev], &device->dev,

					   ideapad_rfk_types[dev], &ideapad_rfk_ops,

					   (void *)(long)dev);

	if (!ideapad_rfkill[dev])

		return -ENOMEM;



	ret = rfkill_register(ideapad_rfkill[dev]);

	if (ret) {

		rfkill_destroy(ideapad_rfkill[dev]);

		return ret;

	}

	return 0;

}



static void ideapad_unregister_rfkill(int dev)

{

	if (!ideapad_rfkill[dev])

		return;



	rfkill_unregister(ideapad_rfkill[dev]);

	rfkill_destroy(ideapad_rfkill[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 *device)

{

	int i;

	int devs_present[5];



	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;



	if (devs_present[IDEAPAD_DEV_CAMERA]) {

		int ret = device_create_file(&device->dev, &dev_attr_camera_power);

		if (ret)

			return ret;

	}



	for (i = IDEAPAD_DEV_WLAN; i <= IDEAPAD_DEV_KILLSW; i++) {

		if (!devs_present[i])

			continue;



		ideapad_register_rfkill(device, i);

	}

	ideapad_sync_rfk_state();

	return 0;

}



static int ideapad_acpi_remove(struct acpi_device *device, int type)

{

	int i;

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

	for (i = 0; i < 5; i++)

		ideapad_unregister_rfkill(i);

	return 0;

}



static void ideapad_acpi_notify(struct acpi_device *device, u32 event)

{

	ideapad_sync_rfk_state();

}



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);