[mirror_ubuntu-artful-kernel.git] / drivers / platform / x86 / hp-wmi.c

/*
 * HP WMI hotkeys
 *
 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
 *
 * Portions based on wistron_btns.c:
 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
 *
 *  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/slab.h>
#include <linux/types.h>
#include <linux/input.h>
#include <acpi/acpi_drivers.h>
#include <linux/platform_device.h>
#include <linux/acpi.h>
#include <linux/rfkill.h>
#include <linux/string.h>

MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
MODULE_LICENSE("GPL");

MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");

#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"

#define HPWMI_DISPLAY_QUERY 0x1
#define HPWMI_HDDTEMP_QUERY 0x2
#define HPWMI_ALS_QUERY 0x3
#define HPWMI_HARDWARE_QUERY 0x4
#define HPWMI_WIRELESS_QUERY 0x5
#define HPWMI_HOTKEY_QUERY 0xc

#define PREFIX "HP WMI: "
#define UNIMP "Unimplemented "

enum hp_wmi_radio {
	HPWMI_WIFI = 0,
	HPWMI_BLUETOOTH = 1,
	HPWMI_WWAN = 2,
};

enum hp_wmi_event_ids {
	HPWMI_DOCK_EVENT = 1,
	HPWMI_PARK_HDD = 2,
	HPWMI_SMART_ADAPTER = 3,
	HPWMI_BEZEL_BUTTON = 4,
	HPWMI_WIRELESS = 5,
	HPWMI_CPU_BATTERY_THROTTLE = 6,
	HPWMI_LOCK_SWITCH = 7,
};

static int __devinit hp_wmi_bios_setup(struct platform_device *device);
static int __exit hp_wmi_bios_remove(struct platform_device *device);
static int hp_wmi_resume_handler(struct device *device);

struct bios_args {
	u32 signature;
	u32 command;
	u32 commandtype;
	u32 datasize;
	u32 data;
};

struct bios_return {
	u32 sigpass;
	u32 return_code;
	u32 value;
};

struct key_entry {
	char type;		/* See KE_* below */
	u16 code;
	u16 keycode;
};

enum { KE_KEY, KE_END };

static struct key_entry hp_wmi_keymap[] = {
	{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
	{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
	{KE_KEY, 0x20e6, KEY_PROG1},
	{KE_KEY, 0x20e8, KEY_MEDIA},
	{KE_KEY, 0x2142, KEY_MEDIA},
	{KE_KEY, 0x213b, KEY_INFO},
	{KE_KEY, 0x2169, KEY_DIRECTION},
	{KE_KEY, 0x231b, KEY_HELP},
	{KE_END, 0}
};

static struct input_dev *hp_wmi_input_dev;
static struct platform_device *hp_wmi_platform_dev;

static struct rfkill *wifi_rfkill;
static struct rfkill *bluetooth_rfkill;
static struct rfkill *wwan_rfkill;

static const struct dev_pm_ops hp_wmi_pm_ops = {
	.resume  = hp_wmi_resume_handler,
	.restore  = hp_wmi_resume_handler,
};

static struct platform_driver hp_wmi_driver = {
	.driver = {
		.name = "hp-wmi",
		.owner = THIS_MODULE,
		.pm = &hp_wmi_pm_ops,
	},
	.probe = hp_wmi_bios_setup,
	.remove = hp_wmi_bios_remove,
};

static int hp_wmi_perform_query(int query, int write, int value)
{
	struct bios_return bios_return;
	acpi_status status;
	union acpi_object *obj;
	struct bios_args args = {
		.signature = 0x55434553,
		.command = write ? 0x2 : 0x1,
		.commandtype = query,
		.datasize = write ? 0x4 : 0,
		.data = value,
	};
	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };

	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);

	obj = output.pointer;

	if (!obj)
		return -EINVAL;
	else if (obj->type != ACPI_TYPE_BUFFER) {
		kfree(obj);
		return -EINVAL;
	}

	bios_return = *((struct bios_return *)obj->buffer.pointer);
	kfree(obj);
	if (bios_return.return_code > 0)
		return bios_return.return_code * -1;
	else
		return bios_return.value;
}

static int hp_wmi_display_state(void)
{
	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
}

static int hp_wmi_hddtemp_state(void)
{
	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
}

static int hp_wmi_als_state(void)
{
	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
}

static int hp_wmi_dock_state(void)
{
	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);

	if (ret < 0)
		return ret;

	return ret & 0x1;
}

static int hp_wmi_tablet_state(void)
{
	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);

	if (ret < 0)
		return ret;

	return (ret & 0x4) ? 1 : 0;
}

static int hp_wmi_set_block(void *data, bool blocked)
{
	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
	int query = BIT(r + 8) | ((!blocked) << r);

	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
}

static const struct rfkill_ops hp_wmi_rfkill_ops = {
	.set_block = hp_wmi_set_block,
};

static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
{
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	int mask = 0x200 << (r * 8);

	if (wireless & mask)
		return false;
	else
		return true;
}

static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
{
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	int mask = 0x800 << (r * 8);

	if (wireless & mask)
		return false;
	else
		return true;
}

static ssize_t show_display(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	int value = hp_wmi_display_state();
	if (value < 0)
		return -EINVAL;
	return sprintf(buf, "%d\n", value);
}

static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	int value = hp_wmi_hddtemp_state();
	if (value < 0)
		return -EINVAL;
	return sprintf(buf, "%d\n", value);
}

static ssize_t show_als(struct device *dev, struct device_attribute *attr,
			char *buf)
{
	int value = hp_wmi_als_state();
	if (value < 0)
		return -EINVAL;
	return sprintf(buf, "%d\n", value);
}

static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	int value = hp_wmi_dock_state();
	if (value < 0)
		return -EINVAL;
	return sprintf(buf, "%d\n", value);
}

static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
			 char *buf)
{
	int value = hp_wmi_tablet_state();
	if (value < 0)
		return -EINVAL;
	return sprintf(buf, "%d\n", value);
}

static ssize_t set_als(struct device *dev, struct device_attribute *attr,
		       const char *buf, size_t count)
{
	u32 tmp = simple_strtoul(buf, NULL, 10);
	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	return count;
}

static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);

static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
{
	struct key_entry *key;

	for (key = hp_wmi_keymap; key->type != KE_END; key++)
		if (code == key->code)
			return key;

	return NULL;
}

static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
{
	struct key_entry *key;

	for (key = hp_wmi_keymap; key->type != KE_END; key++)
		if (key->type == KE_KEY && keycode == key->keycode)
			return key;

	return NULL;
}

static int hp_wmi_getkeycode(struct input_dev *dev,
			     unsigned int scancode, unsigned int *keycode)
{
	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);

	if (key && key->type == KE_KEY) {
		*keycode = key->keycode;
		return 0;
	}

	return -EINVAL;
}

static int hp_wmi_setkeycode(struct input_dev *dev,
			     unsigned int scancode, unsigned int keycode)
{
	struct key_entry *key;
	unsigned int old_keycode;

	key = hp_wmi_get_entry_by_scancode(scancode);
	if (key && key->type == KE_KEY) {
		old_keycode = key->keycode;
		key->keycode = keycode;
		set_bit(keycode, dev->keybit);
		if (!hp_wmi_get_entry_by_keycode(old_keycode))
			clear_bit(old_keycode, dev->keybit);
		return 0;
	}

	return -EINVAL;
}

static void hp_wmi_notify(u32 value, void *context)
{
	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	static struct key_entry *key;
	union acpi_object *obj;
	u32 event_id, event_data;
	int key_code;
	u32 *location;
	acpi_status status;

	status = wmi_get_event_data(value, &response);
	if (status != AE_OK) {
		printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
		return;
	}

	obj = (union acpi_object *)response.pointer;

	if (obj || obj->type != ACPI_TYPE_BUFFER) {
		printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
		       obj->type);
		kfree(obj);
		return;
	}

	/*
	 * Depending on ACPI version the concatenation of id and event data
	 * inside _WED function will result in a 8 or 16 byte buffer.
	 */
	location = (u32 *)obj->buffer.pointer;
	if (obj->buffer.length == 8) {
		event_id = *location;
		event_data = *(location + 1);
	} else if (obj->buffer.length == 16) {
		event_id = *location;
		event_data = *(location + 2);
	} else {
		printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
		       obj->buffer.length);
		kfree(obj);
		return;
	}
	kfree(obj);

	switch (event_id) {
	case HPWMI_DOCK_EVENT:
		input_report_switch(hp_wmi_input_dev, SW_DOCK,
				    hp_wmi_dock_state());
		input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
				    hp_wmi_tablet_state());
		input_sync(hp_wmi_input_dev);
		break;
	case HPWMI_PARK_HDD:
		break;
	case HPWMI_SMART_ADAPTER:
		break;
	case HPWMI_BEZEL_BUTTON:
		key_code = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
						 0);
		key = hp_wmi_get_entry_by_scancode(key_code);
		if (key) {
			switch (key->type) {
			case KE_KEY:
				input_report_key(hp_wmi_input_dev,
						 key->keycode, 1);
				input_sync(hp_wmi_input_dev);
				input_report_key(hp_wmi_input_dev,
						 key->keycode, 0);
				input_sync(hp_wmi_input_dev);
				break;
			}
		} else
			printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
			       key_code);
		break;
	case HPWMI_WIRELESS:
		if (wifi_rfkill)
			rfkill_set_states(wifi_rfkill,
					  hp_wmi_get_sw_state(HPWMI_WIFI),
					  hp_wmi_get_hw_state(HPWMI_WIFI));
		if (bluetooth_rfkill)
			rfkill_set_states(bluetooth_rfkill,
					  hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
					  hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
		if (wwan_rfkill)
			rfkill_set_states(wwan_rfkill,
					  hp_wmi_get_sw_state(HPWMI_WWAN),
					  hp_wmi_get_hw_state(HPWMI_WWAN));
		break;
	case HPWMI_CPU_BATTERY_THROTTLE:
		printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
		       " battery event detected\n");
		break;
	case HPWMI_LOCK_SWITCH:
		break;
	default:
		printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
		       event_id, event_data);
		break;
	}
}

static int __init hp_wmi_input_setup(void)
{
	struct key_entry *key;
	int err;

	hp_wmi_input_dev = input_allocate_device();

	hp_wmi_input_dev->name = "HP WMI hotkeys";
	hp_wmi_input_dev->phys = "wmi/input0";
	hp_wmi_input_dev->id.bustype = BUS_HOST;
	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;

	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
		switch (key->type) {
		case KE_KEY:
			set_bit(EV_KEY, hp_wmi_input_dev->evbit);
			set_bit(key->keycode, hp_wmi_input_dev->keybit);
			break;
		}
	}

	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);

	/* Set initial hardware state */
	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
			    hp_wmi_tablet_state());
	input_sync(hp_wmi_input_dev);

	err = input_register_device(hp_wmi_input_dev);

	if (err) {
		input_free_device(hp_wmi_input_dev);
		return err;
	}

	return 0;
}

static void cleanup_sysfs(struct platform_device *device)
{
	device_remove_file(&device->dev, &dev_attr_display);
	device_remove_file(&device->dev, &dev_attr_hddtemp);
	device_remove_file(&device->dev, &dev_attr_als);
	device_remove_file(&device->dev, &dev_attr_dock);
	device_remove_file(&device->dev, &dev_attr_tablet);
}

static int __devinit hp_wmi_bios_setup(struct platform_device *device)
{
	int err;
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);

	err = device_create_file(&device->dev, &dev_attr_display);
	if (err)
		goto add_sysfs_error;
	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	if (err)
		goto add_sysfs_error;
	err = device_create_file(&device->dev, &dev_attr_als);
	if (err)
		goto add_sysfs_error;
	err = device_create_file(&device->dev, &dev_attr_dock);
	if (err)
		goto add_sysfs_error;
	err = device_create_file(&device->dev, &dev_attr_tablet);
	if (err)
		goto add_sysfs_error;

	if (wireless & 0x1) {
		wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
					   RFKILL_TYPE_WLAN,
					   &hp_wmi_rfkill_ops,
					   (void *) HPWMI_WIFI);
		rfkill_init_sw_state(wifi_rfkill,
				     hp_wmi_get_sw_state(HPWMI_WIFI));
		rfkill_set_hw_state(wifi_rfkill,
				    hp_wmi_get_hw_state(HPWMI_WIFI));
		err = rfkill_register(wifi_rfkill);
		if (err)
			goto register_wifi_error;
	}

	if (wireless & 0x2) {
		bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
						RFKILL_TYPE_BLUETOOTH,
						&hp_wmi_rfkill_ops,
						(void *) HPWMI_BLUETOOTH);
		rfkill_init_sw_state(bluetooth_rfkill,
				     hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
		rfkill_set_hw_state(bluetooth_rfkill,
				    hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
		err = rfkill_register(bluetooth_rfkill);
		if (err)
			goto register_bluetooth_error;
	}

	if (wireless & 0x4) {
		wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
					   RFKILL_TYPE_WWAN,
					   &hp_wmi_rfkill_ops,
					   (void *) HPWMI_WWAN);
		rfkill_init_sw_state(wwan_rfkill,
				     hp_wmi_get_sw_state(HPWMI_WWAN));
		rfkill_set_hw_state(wwan_rfkill,
				    hp_wmi_get_hw_state(HPWMI_WWAN));
		err = rfkill_register(wwan_rfkill);
		if (err)
			goto register_wwan_err;
	}

	return 0;
register_wwan_err:
	rfkill_destroy(wwan_rfkill);
	if (bluetooth_rfkill)
		rfkill_unregister(bluetooth_rfkill);
register_bluetooth_error:
	rfkill_destroy(bluetooth_rfkill);
	if (wifi_rfkill)
		rfkill_unregister(wifi_rfkill);
register_wifi_error:
	rfkill_destroy(wifi_rfkill);
add_sysfs_error:
	cleanup_sysfs(device);
	return err;
}

static int __exit hp_wmi_bios_remove(struct platform_device *device)
{
	cleanup_sysfs(device);

	if (wifi_rfkill) {
		rfkill_unregister(wifi_rfkill);
		rfkill_destroy(wifi_rfkill);
	}
	if (bluetooth_rfkill) {
		rfkill_unregister(bluetooth_rfkill);
		rfkill_destroy(bluetooth_rfkill);
	}
	if (wwan_rfkill) {
		rfkill_unregister(wwan_rfkill);
		rfkill_destroy(wwan_rfkill);
	}

	return 0;
}

static int hp_wmi_resume_handler(struct device *device)
{
	/*
	 * Hardware state may have changed while suspended, so trigger
	 * input events for the current state. As this is a switch,
	 * the input layer will only actually pass it on if the state
	 * changed.
	 */
	if (hp_wmi_input_dev) {
		input_report_switch(hp_wmi_input_dev, SW_DOCK,
				    hp_wmi_dock_state());
		input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
				    hp_wmi_tablet_state());
		input_sync(hp_wmi_input_dev);
	}

	if (wifi_rfkill)
		rfkill_set_states(wifi_rfkill,
				  hp_wmi_get_sw_state(HPWMI_WIFI),
				  hp_wmi_get_hw_state(HPWMI_WIFI));
	if (bluetooth_rfkill)
		rfkill_set_states(bluetooth_rfkill,
				  hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
				  hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	if (wwan_rfkill)
		rfkill_set_states(wwan_rfkill,
				  hp_wmi_get_sw_state(HPWMI_WWAN),
				  hp_wmi_get_hw_state(HPWMI_WWAN));

	return 0;
}

static int __init hp_wmi_init(void)
{
	int err;

	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
		err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
						 hp_wmi_notify, NULL);
		if (ACPI_SUCCESS(err))
			hp_wmi_input_setup();
	}

	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
		err = platform_driver_register(&hp_wmi_driver);
		if (err)
			return 0;
		hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
		if (!hp_wmi_platform_dev) {
			platform_driver_unregister(&hp_wmi_driver);
			return 0;
		}
		platform_device_add(hp_wmi_platform_dev);
	}

	return 0;
}

static void __exit hp_wmi_exit(void)
{
	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
		wmi_remove_notify_handler(HPWMI_EVENT_GUID);
		input_unregister_device(hp_wmi_input_dev);
	}
	if (hp_wmi_platform_dev) {
		platform_device_del(hp_wmi_platform_dev);
		platform_driver_unregister(&hp_wmi_driver);
	}
}

module_init(hp_wmi_init);
module_exit(hp_wmi_exit);
Commit	Line	Data
62ec30d4 MG	1	/*
	2	* HP WMI hotkeys
	3	*
	4	* Copyright (C) 2008 Red Hat <mjg@redhat.com>
	5	*
	6	* Portions based on wistron_btns.c:
	7	* Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
	8	* Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
	9	* Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
	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
	14	* (at your option) any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	24	*/
	25
	26	#include <linux/kernel.h>
	27	#include <linux/module.h>
	28	#include <linux/init.h>
5a0e3ad6	29	#include <linux/slab.h>
62ec30d4 MG	30	#include <linux/types.h>
	31	#include <linux/input.h>
	32	#include <acpi/acpi_drivers.h>
	33	#include <linux/platform_device.h>
	34	#include <linux/acpi.h>
	35	#include <linux/rfkill.h>
	36	#include <linux/string.h>
	37
	38	MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
	39	MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
	40	MODULE_LICENSE("GPL");
	41
	42	MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
	43	MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
	44
	45	#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
	46	#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
	47
	48	#define HPWMI_DISPLAY_QUERY 0x1
	49	#define HPWMI_HDDTEMP_QUERY 0x2
	50	#define HPWMI_ALS_QUERY 0x3
871043bc	51	#define HPWMI_HARDWARE_QUERY 0x4
62ec30d4	52	#define HPWMI_WIRELESS_QUERY 0x5
a8823aef	53	#define HPWMI_HOTKEY_QUERY 0xc
62ec30d4	54
a2806c6f	55	#define PREFIX "HP WMI: "
1bbdfd59	56	#define UNIMP "Unimplemented "
a2806c6f	57
e5fbba85 AJ	58	enum hp_wmi_radio {
	59	HPWMI_WIFI = 0,
	60	HPWMI_BLUETOOTH = 1,
	61	HPWMI_WWAN = 2,
	62	};
	63
751ae808 TR	64	enum hp_wmi_event_ids {
751ae808 TR	65	HPWMI_DOCK_EVENT = 1,
1bbdfd59 TR	66	HPWMI_PARK_HDD = 2,
1bbdfd59 TR	67	HPWMI_SMART_ADAPTER = 3,
751ae808 TR	68	HPWMI_BEZEL_BUTTON = 4,
751ae808 TR	69	HPWMI_WIRELESS = 5,
1bbdfd59 TR	70	HPWMI_CPU_BATTERY_THROTTLE = 6,
1bbdfd59 TR	71	HPWMI_LOCK_SWITCH = 7,
751ae808 TR	72	};
751ae808 TR	73
ea79632d	74	static int __devinit hp_wmi_bios_setup(struct platform_device *device);
62ec30d4	75	static int __exit hp_wmi_bios_remove(struct platform_device *device);
8dd2b426	76	static int hp_wmi_resume_handler(struct device *device);
62ec30d4 MG	77
	78	struct bios_args {
	79	u32 signature;
	80	u32 command;
	81	u32 commandtype;
	82	u32 datasize;
	83	u32 data;
	84	};
	85
	86	struct bios_return {
	87	u32 sigpass;
	88	u32 return_code;
	89	u32 value;
	90	};
	91
	92	struct key_entry {
	93	char type; /* See KE_* below */
a8823aef	94	u16 code;
62ec30d4 MG	95	u16 keycode;
	96	};
	97
871043bc	98	enum { KE_KEY, KE_END };
62ec30d4 MG	99
62ec30d4 MG	100	static struct key_entry hp_wmi_keymap[] = {
62ec30d4 MG	101	{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
62ec30d4 MG	102	{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
a8823aef	103	{KE_KEY, 0x20e6, KEY_PROG1},
f6b2ff08	104	{KE_KEY, 0x20e8, KEY_MEDIA},
a8823aef	105	{KE_KEY, 0x2142, KEY_MEDIA},
5c624841	106	{KE_KEY, 0x213b, KEY_INFO},
caeacf59	107	{KE_KEY, 0x2169, KEY_DIRECTION},
a8823aef	108	{KE_KEY, 0x231b, KEY_HELP},
62ec30d4 MG	109	{KE_END, 0}
	110	};
	111
	112	static struct input_dev *hp_wmi_input_dev;
	113	static struct platform_device *hp_wmi_platform_dev;
	114
	115	static struct rfkill *wifi_rfkill;
	116	static struct rfkill *bluetooth_rfkill;
	117	static struct rfkill *wwan_rfkill;
	118
47145210	119	static const struct dev_pm_ops hp_wmi_pm_ops = {
8dd2b426 FP	120	.resume = hp_wmi_resume_handler,
	121	.restore = hp_wmi_resume_handler,
	122	};
	123
62ec30d4 MG	124	static struct platform_driver hp_wmi_driver = {
62ec30d4 MG	125	.driver = {
8dd2b426 FP	126	.name = "hp-wmi",
	127	.owner = THIS_MODULE,
	128	.pm = &hp_wmi_pm_ops,
62ec30d4 MG	129	},
	130	.probe = hp_wmi_bios_setup,
	131	.remove = hp_wmi_bios_remove,
	132	};
	133
	134	static int hp_wmi_perform_query(int query, int write, int value)
	135	{
	136	struct bios_return bios_return;
	137	acpi_status status;
	138	union acpi_object *obj;
	139	struct bios_args args = {
	140	.signature = 0x55434553,
	141	.command = write ? 0x2 : 0x1,
	142	.commandtype = query,
	143	.datasize = write ? 0x4 : 0,
	144	.data = value,
	145	};
	146	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	147	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	148
	149	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
	150
	151	obj = output.pointer;
	152
44ef00e6	153	if (!obj)
62ec30d4	154	return -EINVAL;
44ef00e6 TR	155	else if (obj->type != ACPI_TYPE_BUFFER) {
	156	kfree(obj);
	157	return -EINVAL;
	158	}
62ec30d4 MG	159
62ec30d4 MG	160	bios_return = ((struct bios_return )obj->buffer.pointer);
44ef00e6	161	kfree(obj);
62ec30d4 MG	162	if (bios_return.return_code > 0)
	163	return bios_return.return_code * -1;
	164	else
	165	return bios_return.value;
	166	}
	167
	168	static int hp_wmi_display_state(void)
	169	{
	170	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
	171	}
	172
	173	static int hp_wmi_hddtemp_state(void)
	174	{
	175	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
	176	}
	177
	178	static int hp_wmi_als_state(void)
	179	{
	180	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
	181	}
	182
	183	static int hp_wmi_dock_state(void)
	184	{
871043bc	185	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
62ec30d4	186
871043bc MG	187	if (ret < 0)
	188	return ret;
	189
	190	return ret & 0x1;
62ec30d4 MG	191	}
62ec30d4 MG	192
871043bc	193	static int hp_wmi_tablet_state(void)
62ec30d4	194	{
871043bc MG	195	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
	196
	197	if (ret < 0)
	198	return ret;
	199
	200	return (ret & 0x4) ? 1 : 0;
62ec30d4 MG	201	}
62ec30d4 MG	202
19d337df	203	static int hp_wmi_set_block(void *data, bool blocked)
62ec30d4	204	{
e5fbba85 AJ	205	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
e5fbba85 AJ	206	int query = BIT(r + 8) \| ((!blocked) << r);
62ec30d4	207
19d337df	208	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
62ec30d4 MG	209	}
62ec30d4 MG	210
19d337df JB	211	static const struct rfkill_ops hp_wmi_rfkill_ops = {
	212	.set_block = hp_wmi_set_block,
	213	};
62ec30d4	214
e5fbba85	215	static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
62ec30d4 MG	216	{
62ec30d4 MG	217	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	218	int mask = 0x200 << (r * 8);
62ec30d4	219
e5fbba85	220	if (wireless & mask)
19d337df	221	return false;
62ec30d4	222	else
19d337df	223	return true;
62ec30d4 MG	224	}
62ec30d4 MG	225
e5fbba85	226	static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
62ec30d4 MG	227	{
62ec30d4 MG	228	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	229	int mask = 0x800 << (r * 8);
62ec30d4	230
e5fbba85	231	if (wireless & mask)
19d337df	232	return false;
62ec30d4	233	else
19d337df	234	return true;
62ec30d4 MG	235	}
	236
	237	static ssize_t show_display(struct device dev, struct device_attribute attr,
	238	char *buf)
	239	{
	240	int value = hp_wmi_display_state();
	241	if (value < 0)
	242	return -EINVAL;
	243	return sprintf(buf, "%d\n", value);
	244	}
	245
	246	static ssize_t show_hddtemp(struct device dev, struct device_attribute attr,
	247	char *buf)
	248	{
	249	int value = hp_wmi_hddtemp_state();
	250	if (value < 0)
	251	return -EINVAL;
	252	return sprintf(buf, "%d\n", value);
	253	}
	254
	255	static ssize_t show_als(struct device dev, struct device_attribute attr,
	256	char *buf)
	257	{
	258	int value = hp_wmi_als_state();
	259	if (value < 0)
	260	return -EINVAL;
	261	return sprintf(buf, "%d\n", value);
	262	}
	263
	264	static ssize_t show_dock(struct device dev, struct device_attribute attr,
	265	char *buf)
	266	{
	267	int value = hp_wmi_dock_state();
	268	if (value < 0)
	269	return -EINVAL;
	270	return sprintf(buf, "%d\n", value);
	271	}
	272
871043bc MG	273	static ssize_t show_tablet(struct device dev, struct device_attribute attr,
	274	char *buf)
	275	{
	276	int value = hp_wmi_tablet_state();
	277	if (value < 0)
	278	return -EINVAL;
	279	return sprintf(buf, "%d\n", value);
	280	}
	281
62ec30d4 MG	282	static ssize_t set_als(struct device dev, struct device_attribute attr,
	283	const char *buf, size_t count)
	284	{
	285	u32 tmp = simple_strtoul(buf, NULL, 10);
	286	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	287	return count;
	288	}
	289
	290	static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
	291	static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
	292	static DEVICE_ATTR(als, S_IRUGO \| S_IWUSR, show_als, set_als);
	293	static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
871043bc	294	static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
62ec30d4	295
58b93995	296	static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
62ec30d4 MG	297	{
	298	struct key_entry *key;
	299
	300	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	301	if (code == key->code)
	302	return key;
	303
	304	return NULL;
	305	}
	306
58b93995	307	static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
62ec30d4 MG	308	{
	309	struct key_entry *key;
	310
	311	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	312	if (key->type == KE_KEY && keycode == key->keycode)
	313	return key;
	314
	315	return NULL;
	316	}
	317
58b93995 DT	318	static int hp_wmi_getkeycode(struct input_dev *dev,
58b93995 DT	319	unsigned int scancode, unsigned int *keycode)
62ec30d4 MG	320	{
	321	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
	322
	323	if (key && key->type == KE_KEY) {
	324	*keycode = key->keycode;
	325	return 0;
	326	}
	327
	328	return -EINVAL;
	329	}
	330
58b93995 DT	331	static int hp_wmi_setkeycode(struct input_dev *dev,
58b93995 DT	332	unsigned int scancode, unsigned int keycode)
62ec30d4 MG	333	{
62ec30d4 MG	334	struct key_entry *key;
58b93995	335	unsigned int old_keycode;
62ec30d4 MG	336
	337	key = hp_wmi_get_entry_by_scancode(scancode);
	338	if (key && key->type == KE_KEY) {
	339	old_keycode = key->keycode;
	340	key->keycode = keycode;
	341	set_bit(keycode, dev->keybit);
	342	if (!hp_wmi_get_entry_by_keycode(old_keycode))
	343	clear_bit(old_keycode, dev->keybit);
	344	return 0;
	345	}
	346
	347	return -EINVAL;
	348	}
	349
88429a10	350	static void hp_wmi_notify(u32 value, void *context)
62ec30d4 MG	351	{
	352	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	353	static struct key_entry *key;
	354	union acpi_object *obj;
8dda6b04 TR	355	u32 event_id, event_data;
	356	int key_code;
	357	u32 *location;
fda11e61	358	acpi_status status;
62ec30d4	359
fda11e61 LB	360	status = wmi_get_event_data(value, &response);
fda11e61 LB	361	if (status != AE_OK) {
a2806c6f	362	printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
fda11e61 LB	363	return;
fda11e61 LB	364	}
62ec30d4 MG	365
	366	obj = (union acpi_object *)response.pointer;
	367
8dda6b04 TR	368	if (obj \|\| obj->type != ACPI_TYPE_BUFFER) {
	369	printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
	370	obj->type);
44ef00e6	371	kfree(obj);
e5fbba85 AJ	372	return;
	373	}
	374
8dda6b04 TR	375	/*
	376	* Depending on ACPI version the concatenation of id and event data
	377	* inside _WED function will result in a 8 or 16 byte buffer.
	378	*/
	379	location = (u32 *)obj->buffer.pointer;
	380	if (obj->buffer.length == 8) {
	381	event_id = *location;
	382	event_data = *(location + 1);
	383	} else if (obj->buffer.length == 16) {
	384	event_id = *location;
	385	event_data = *(location + 2);
	386	} else {
	387	printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
	388	obj->buffer.length);
	389	kfree(obj);
	390	return;
	391	}
44ef00e6	392	kfree(obj);
8dda6b04 TR	393
8dda6b04 TR	394	switch (event_id) {
751ae808	395	case HPWMI_DOCK_EVENT:
e5fbba85 AJ	396	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	397	hp_wmi_dock_state());
	398	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	399	hp_wmi_tablet_state());
	400	input_sync(hp_wmi_input_dev);
751ae808	401	break;
1bbdfd59 TR	402	case HPWMI_PARK_HDD:
	403	break;
	404	case HPWMI_SMART_ADAPTER:
	405	break;
751ae808 TR	406	case HPWMI_BEZEL_BUTTON:
	407	key_code = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
	408	0);
	409	key = hp_wmi_get_entry_by_scancode(key_code);
	410	if (key) {
	411	switch (key->type) {
	412	case KE_KEY:
	413	input_report_key(hp_wmi_input_dev,
	414	key->keycode, 1);
	415	input_sync(hp_wmi_input_dev);
	416	input_report_key(hp_wmi_input_dev,
	417	key->keycode, 0);
	418	input_sync(hp_wmi_input_dev);
	419	break;
	420	}
da9a79ba	421	} else
a2806c6f	422	printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
da9a79ba	423	key_code);
751ae808 TR	424	break;
751ae808 TR	425	case HPWMI_WIRELESS:
e5fbba85 AJ	426	if (wifi_rfkill)
	427	rfkill_set_states(wifi_rfkill,
	428	hp_wmi_get_sw_state(HPWMI_WIFI),
	429	hp_wmi_get_hw_state(HPWMI_WIFI));
	430	if (bluetooth_rfkill)
	431	rfkill_set_states(bluetooth_rfkill,
	432	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	433	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	434	if (wwan_rfkill)
	435	rfkill_set_states(wwan_rfkill,
	436	hp_wmi_get_sw_state(HPWMI_WWAN),
	437	hp_wmi_get_hw_state(HPWMI_WWAN));
751ae808	438	break;
1bbdfd59 TR	439	case HPWMI_CPU_BATTERY_THROTTLE:
	440	printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
	441	" battery event detected\n");
	442	break;
	443	case HPWMI_LOCK_SWITCH:
	444	break;
751ae808	445	default:
8dda6b04 TR	446	printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
8dda6b04 TR	447	event_id, event_data);
751ae808 TR	448	break;
751ae808 TR	449	}
62ec30d4 MG	450	}
	451
	452	static int __init hp_wmi_input_setup(void)
	453	{
	454	struct key_entry *key;
	455	int err;
	456
	457	hp_wmi_input_dev = input_allocate_device();
	458
	459	hp_wmi_input_dev->name = "HP WMI hotkeys";
	460	hp_wmi_input_dev->phys = "wmi/input0";
	461	hp_wmi_input_dev->id.bustype = BUS_HOST;
	462	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	463	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
	464
	465	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
	466	switch (key->type) {
	467	case KE_KEY:
	468	set_bit(EV_KEY, hp_wmi_input_dev->evbit);
	469	set_bit(key->keycode, hp_wmi_input_dev->keybit);
	470	break;
62ec30d4 MG	471	}
	472	}
	473
871043bc MG	474	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	475	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	476	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
	477
	478	/* Set initial hardware state */
	479	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	480	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	481	hp_wmi_tablet_state());
	482	input_sync(hp_wmi_input_dev);
	483
62ec30d4 MG	484	err = input_register_device(hp_wmi_input_dev);
	485
	486	if (err) {
	487	input_free_device(hp_wmi_input_dev);
	488	return err;
	489	}
	490
	491	return 0;
	492	}
	493
	494	static void cleanup_sysfs(struct platform_device *device)
	495	{
	496	device_remove_file(&device->dev, &dev_attr_display);
	497	device_remove_file(&device->dev, &dev_attr_hddtemp);
	498	device_remove_file(&device->dev, &dev_attr_als);
	499	device_remove_file(&device->dev, &dev_attr_dock);
871043bc	500	device_remove_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	501	}
62ec30d4 MG	502
ea79632d	503	static int __devinit hp_wmi_bios_setup(struct platform_device *device)
62ec30d4 MG	504	{
62ec30d4 MG	505	int err;
3f6e2f13	506	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
62ec30d4 MG	507
	508	err = device_create_file(&device->dev, &dev_attr_display);
	509	if (err)
	510	goto add_sysfs_error;
	511	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	512	if (err)
	513	goto add_sysfs_error;
	514	err = device_create_file(&device->dev, &dev_attr_als);
	515	if (err)
	516	goto add_sysfs_error;
	517	err = device_create_file(&device->dev, &dev_attr_dock);
871043bc MG	518	if (err)
	519	goto add_sysfs_error;
	520	err = device_create_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	521	if (err)
	522	goto add_sysfs_error;
	523
3f6e2f13	524	if (wireless & 0x1) {
19d337df JB	525	wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
	526	RFKILL_TYPE_WLAN,
	527	&hp_wmi_rfkill_ops,
e5fbba85 AJ	528	(void *) HPWMI_WIFI);
	529	rfkill_init_sw_state(wifi_rfkill,
	530	hp_wmi_get_sw_state(HPWMI_WIFI));
	531	rfkill_set_hw_state(wifi_rfkill,
	532	hp_wmi_get_hw_state(HPWMI_WIFI));
fe8e4e03 LF	533	err = rfkill_register(wifi_rfkill);
fe8e4e03 LF	534	if (err)
19d337df	535	goto register_wifi_error;
3f6e2f13 MG	536	}
	537
	538	if (wireless & 0x2) {
19d337df JB	539	bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
	540	RFKILL_TYPE_BLUETOOTH,
	541	&hp_wmi_rfkill_ops,
e5fbba85 AJ	542	(void *) HPWMI_BLUETOOTH);
	543	rfkill_init_sw_state(bluetooth_rfkill,
	544	hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
	545	rfkill_set_hw_state(bluetooth_rfkill,
	546	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
fe8e4e03	547	err = rfkill_register(bluetooth_rfkill);
6989d565	548	if (err)
fe8e4e03	549	goto register_bluetooth_error;
3f6e2f13 MG	550	}
	551
	552	if (wireless & 0x4) {
19d337df JB	553	wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
	554	RFKILL_TYPE_WWAN,
	555	&hp_wmi_rfkill_ops,
e5fbba85 AJ	556	(void *) HPWMI_WWAN);
	557	rfkill_init_sw_state(wwan_rfkill,
	558	hp_wmi_get_sw_state(HPWMI_WWAN));
	559	rfkill_set_hw_state(wwan_rfkill,
	560	hp_wmi_get_hw_state(HPWMI_WWAN));
fe8e4e03 LF	561	err = rfkill_register(wwan_rfkill);
	562	if (err)
	563	goto register_wwan_err;
3f6e2f13	564	}
62ec30d4 MG	565
62ec30d4 MG	566	return 0;
fe8e4e03	567	register_wwan_err:
19d337df	568	rfkill_destroy(wwan_rfkill);
44f0606d AM	569	if (bluetooth_rfkill)
44f0606d AM	570	rfkill_unregister(bluetooth_rfkill);
fe8e4e03	571	register_bluetooth_error:
19d337df	572	rfkill_destroy(bluetooth_rfkill);
44f0606d AM	573	if (wifi_rfkill)
44f0606d AM	574	rfkill_unregister(wifi_rfkill);
19d337df JB	575	register_wifi_error:
19d337df JB	576	rfkill_destroy(wifi_rfkill);
62ec30d4 MG	577	add_sysfs_error:
	578	cleanup_sysfs(device);
	579	return err;
	580	}
	581
	582	static int __exit hp_wmi_bios_remove(struct platform_device *device)
	583	{
	584	cleanup_sysfs(device);
	585
19d337df	586	if (wifi_rfkill) {
3f6e2f13	587	rfkill_unregister(wifi_rfkill);
19d337df JB	588	rfkill_destroy(wifi_rfkill);
	589	}
	590	if (bluetooth_rfkill) {
3f6e2f13	591	rfkill_unregister(bluetooth_rfkill);
09729f0b	592	rfkill_destroy(bluetooth_rfkill);
19d337df JB	593	}
19d337df JB	594	if (wwan_rfkill) {
3f6e2f13	595	rfkill_unregister(wwan_rfkill);
19d337df JB	596	rfkill_destroy(wwan_rfkill);
19d337df JB	597	}
62ec30d4 MG	598
	599	return 0;
	600	}
	601
8dd2b426	602	static int hp_wmi_resume_handler(struct device *device)
4c395bdd	603	{
4c395bdd	604	/*
871043bc MG	605	* Hardware state may have changed while suspended, so trigger
871043bc MG	606	* input events for the current state. As this is a switch,
4c395bdd FP	607	* the input layer will only actually pass it on if the state
	608	* changed.
	609	*/
daed9537 FP	610	if (hp_wmi_input_dev) {
	611	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	612	hp_wmi_dock_state());
	613	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	614	hp_wmi_tablet_state());
	615	input_sync(hp_wmi_input_dev);
	616	}
4c395bdd	617
e5fbba85 AJ	618	if (wifi_rfkill)
	619	rfkill_set_states(wifi_rfkill,
	620	hp_wmi_get_sw_state(HPWMI_WIFI),
	621	hp_wmi_get_hw_state(HPWMI_WIFI));
	622	if (bluetooth_rfkill)
	623	rfkill_set_states(bluetooth_rfkill,
	624	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	625	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	626	if (wwan_rfkill)
	627	rfkill_set_states(wwan_rfkill,
	628	hp_wmi_get_sw_state(HPWMI_WWAN),
	629	hp_wmi_get_hw_state(HPWMI_WWAN));
	630
4c395bdd FP	631	return 0;
	632	}
	633
62ec30d4 MG	634	static int __init hp_wmi_init(void)
	635	{
	636	int err;
	637
	638	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	639	err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
	640	hp_wmi_notify, NULL);
f2772575	641	if (ACPI_SUCCESS(err))
62ec30d4 MG	642	hp_wmi_input_setup();
	643	}
	644
	645	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
	646	err = platform_driver_register(&hp_wmi_driver);
	647	if (err)
	648	return 0;
	649	hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
	650	if (!hp_wmi_platform_dev) {
	651	platform_driver_unregister(&hp_wmi_driver);
	652	return 0;
	653	}
	654	platform_device_add(hp_wmi_platform_dev);
	655	}
	656
	657	return 0;
	658	}
	659
	660	static void __exit hp_wmi_exit(void)
	661	{
	662	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	663	wmi_remove_notify_handler(HPWMI_EVENT_GUID);
	664	input_unregister_device(hp_wmi_input_dev);
	665	}
	666	if (hp_wmi_platform_dev) {
	667	platform_device_del(hp_wmi_platform_dev);
	668	platform_driver_unregister(&hp_wmi_driver);
	669	}
	670	}
	671
	672	module_init(hp_wmi_init);
	673	module_exit(hp_wmi_exit);