[deliverable/linux.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/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

static int __init 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 platform_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, 0x2142, KEY_MEDIA},
	{KE_KEY, 0x213b, KEY_INFO},
	{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 struct platform_driver hp_wmi_driver = {
	.driver = {
		   .name = "hp-wmi",
		   .owner = THIS_MODULE,
	},
	.probe = hp_wmi_bios_setup,
	.remove = hp_wmi_bios_remove,
	.resume = hp_wmi_resume_handler,
};

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 || obj->type != ACPI_TYPE_BUFFER)
		return -EINVAL;

	bios_return = *((struct bios_return *)obj->buffer.pointer);
	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)
{
	unsigned long b = (unsigned long) data;
	int query = BIT(b + 8) | ((!blocked) << b);

	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_wifi_state(void)
{
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);

	if (wireless & 0x100)
		return false;
	else
		return true;
}

static bool hp_wmi_bluetooth_state(void)
{
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);

	if (wireless & 0x10000)
		return false;
	else
		return true;
}

static bool hp_wmi_wwan_state(void)
{
	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);

	if (wireless & 0x1000000)
		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(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(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, int scancode, 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, int scancode, int keycode)
{
	struct key_entry *key;
	int old_keycode;

	if (keycode < 0 || keycode > KEY_MAX)
		return -EINVAL;

	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;

	wmi_get_event_data(value, &response);

	obj = (union acpi_object *)response.pointer;

	if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
		int eventcode = *((u8 *) obj->buffer.pointer);
		if (eventcode == 0x4)
			eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
							 0);
		key = hp_wmi_get_entry_by_scancode(eventcode);
		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 if (eventcode == 0x1) {
			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);
		} else if (eventcode == 0x5) {
			if (wifi_rfkill)
				rfkill_set_sw_state(wifi_rfkill,
						    hp_wmi_wifi_state());
			if (bluetooth_rfkill)
				rfkill_set_sw_state(bluetooth_rfkill,
						    hp_wmi_bluetooth_state());
			if (wwan_rfkill)
				rfkill_set_sw_state(wwan_rfkill,
						    hp_wmi_wwan_state());
		} else
			printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
			       eventcode);
	} else
		printk(KERN_INFO "HP WMI: Unknown response received\n");
}

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 __init 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 *) 0);
		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 *) 1);
		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 *) 2);
		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(wifi_rfkill);
	}
	if (wwan_rfkill) {
		rfkill_unregister(wwan_rfkill);
		rfkill_destroy(wwan_rfkill);
	}

	return 0;
}

static int hp_wmi_resume_handler(struct platform_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);
	}

	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 (!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>
	29	#include <linux/types.h>
	30	#include <linux/input.h>
	31	#include <acpi/acpi_drivers.h>
	32	#include <linux/platform_device.h>
	33	#include <linux/acpi.h>
	34	#include <linux/rfkill.h>
	35	#include <linux/string.h>
	36
	37	MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
	38	MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
	39	MODULE_LICENSE("GPL");
	40
	41	MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
	42	MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
	43
	44	#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
	45	#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
	46
	47	#define HPWMI_DISPLAY_QUERY 0x1
	48	#define HPWMI_HDDTEMP_QUERY 0x2
	49	#define HPWMI_ALS_QUERY 0x3
871043bc	50	#define HPWMI_HARDWARE_QUERY 0x4
62ec30d4	51	#define HPWMI_WIRELESS_QUERY 0x5
a8823aef	52	#define HPWMI_HOTKEY_QUERY 0xc
62ec30d4 MG	53
	54	static int __init hp_wmi_bios_setup(struct platform_device *device);
	55	static int __exit hp_wmi_bios_remove(struct platform_device *device);
4c395bdd	56	static int hp_wmi_resume_handler(struct platform_device *device);
62ec30d4 MG	57
	58	struct bios_args {
	59	u32 signature;
	60	u32 command;
	61	u32 commandtype;
	62	u32 datasize;
	63	u32 data;
	64	};
	65
	66	struct bios_return {
	67	u32 sigpass;
	68	u32 return_code;
	69	u32 value;
	70	};
	71
	72	struct key_entry {
	73	char type; /* See KE_* below */
a8823aef	74	u16 code;
62ec30d4 MG	75	u16 keycode;
	76	};
	77
871043bc	78	enum { KE_KEY, KE_END };
62ec30d4 MG	79
62ec30d4 MG	80	static struct key_entry hp_wmi_keymap[] = {
62ec30d4 MG	81	{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
62ec30d4 MG	82	{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
a8823aef MG	83	{KE_KEY, 0x20e6, KEY_PROG1},
a8823aef MG	84	{KE_KEY, 0x2142, KEY_MEDIA},
5c624841	85	{KE_KEY, 0x213b, KEY_INFO},
a8823aef	86	{KE_KEY, 0x231b, KEY_HELP},
62ec30d4 MG	87	{KE_END, 0}
	88	};
	89
	90	static struct input_dev *hp_wmi_input_dev;
	91	static struct platform_device *hp_wmi_platform_dev;
	92
	93	static struct rfkill *wifi_rfkill;
	94	static struct rfkill *bluetooth_rfkill;
	95	static struct rfkill *wwan_rfkill;
	96
	97	static struct platform_driver hp_wmi_driver = {
	98	.driver = {
	99	.name = "hp-wmi",
	100	.owner = THIS_MODULE,
	101	},
	102	.probe = hp_wmi_bios_setup,
	103	.remove = hp_wmi_bios_remove,
4c395bdd	104	.resume = hp_wmi_resume_handler,
62ec30d4 MG	105	};
	106
	107	static int hp_wmi_perform_query(int query, int write, int value)
	108	{
	109	struct bios_return bios_return;
	110	acpi_status status;
	111	union acpi_object *obj;
	112	struct bios_args args = {
	113	.signature = 0x55434553,
	114	.command = write ? 0x2 : 0x1,
	115	.commandtype = query,
	116	.datasize = write ? 0x4 : 0,
	117	.data = value,
	118	};
	119	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	120	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	121
	122	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
	123
	124	obj = output.pointer;
	125
	126	if (!obj \|\| obj->type != ACPI_TYPE_BUFFER)
	127	return -EINVAL;
	128
	129	bios_return = ((struct bios_return )obj->buffer.pointer);
	130	if (bios_return.return_code > 0)
	131	return bios_return.return_code * -1;
	132	else
	133	return bios_return.value;
	134	}
	135
	136	static int hp_wmi_display_state(void)
	137	{
	138	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
	139	}
	140
	141	static int hp_wmi_hddtemp_state(void)
	142	{
	143	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
	144	}
	145
	146	static int hp_wmi_als_state(void)
	147	{
	148	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
	149	}
	150
	151	static int hp_wmi_dock_state(void)
	152	{
871043bc	153	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
62ec30d4	154
871043bc MG	155	if (ret < 0)
	156	return ret;
	157
	158	return ret & 0x1;
62ec30d4 MG	159	}
62ec30d4 MG	160
871043bc	161	static int hp_wmi_tablet_state(void)
62ec30d4	162	{
871043bc MG	163	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
	164
	165	if (ret < 0)
	166	return ret;
	167
	168	return (ret & 0x4) ? 1 : 0;
62ec30d4 MG	169	}
62ec30d4 MG	170
19d337df	171	static int hp_wmi_set_block(void *data, bool blocked)
62ec30d4	172	{
19d337df	173	unsigned long b = (unsigned long) data;
76d8b64e	174	int query = BIT(b + 8) \| ((!blocked) << b);
62ec30d4	175
19d337df	176	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
62ec30d4 MG	177	}
62ec30d4 MG	178
19d337df JB	179	static const struct rfkill_ops hp_wmi_rfkill_ops = {
	180	.set_block = hp_wmi_set_block,
	181	};
62ec30d4	182
19d337df	183	static bool hp_wmi_wifi_state(void)
62ec30d4 MG	184	{
	185	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	186
	187	if (wireless & 0x100)
19d337df	188	return false;
62ec30d4	189	else
19d337df	190	return true;
62ec30d4 MG	191	}
62ec30d4 MG	192
19d337df	193	static bool hp_wmi_bluetooth_state(void)
62ec30d4 MG	194	{
	195	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	196
	197	if (wireless & 0x10000)
19d337df	198	return false;
62ec30d4	199	else
19d337df	200	return true;
62ec30d4 MG	201	}
62ec30d4 MG	202
19d337df	203	static bool hp_wmi_wwan_state(void)
62ec30d4 MG	204	{
	205	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	206
	207	if (wireless & 0x1000000)
19d337df	208	return false;
62ec30d4	209	else
19d337df	210	return true;
62ec30d4 MG	211	}
	212
	213	static ssize_t show_display(struct device dev, struct device_attribute attr,
	214	char *buf)
	215	{
	216	int value = hp_wmi_display_state();
	217	if (value < 0)
	218	return -EINVAL;
	219	return sprintf(buf, "%d\n", value);
	220	}
	221
	222	static ssize_t show_hddtemp(struct device dev, struct device_attribute attr,
	223	char *buf)
	224	{
	225	int value = hp_wmi_hddtemp_state();
	226	if (value < 0)
	227	return -EINVAL;
	228	return sprintf(buf, "%d\n", value);
	229	}
	230
	231	static ssize_t show_als(struct device dev, struct device_attribute attr,
	232	char *buf)
	233	{
	234	int value = hp_wmi_als_state();
	235	if (value < 0)
	236	return -EINVAL;
	237	return sprintf(buf, "%d\n", value);
	238	}
	239
	240	static ssize_t show_dock(struct device dev, struct device_attribute attr,
	241	char *buf)
	242	{
	243	int value = hp_wmi_dock_state();
	244	if (value < 0)
	245	return -EINVAL;
	246	return sprintf(buf, "%d\n", value);
	247	}
	248
871043bc MG	249	static ssize_t show_tablet(struct device dev, struct device_attribute attr,
	250	char *buf)
	251	{
	252	int value = hp_wmi_tablet_state();
	253	if (value < 0)
	254	return -EINVAL;
	255	return sprintf(buf, "%d\n", value);
	256	}
	257
62ec30d4 MG	258	static ssize_t set_als(struct device dev, struct device_attribute attr,
	259	const char *buf, size_t count)
	260	{
	261	u32 tmp = simple_strtoul(buf, NULL, 10);
	262	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	263	return count;
	264	}
	265
	266	static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
	267	static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
	268	static DEVICE_ATTR(als, S_IRUGO \| S_IWUSR, show_als, set_als);
	269	static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
871043bc	270	static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
62ec30d4 MG	271
	272	static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
	273	{
	274	struct key_entry *key;
	275
	276	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	277	if (code == key->code)
	278	return key;
	279
	280	return NULL;
	281	}
	282
	283	static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
	284	{
	285	struct key_entry *key;
	286
	287	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	288	if (key->type == KE_KEY && keycode == key->keycode)
	289	return key;
	290
	291	return NULL;
	292	}
	293
	294	static int hp_wmi_getkeycode(struct input_dev dev, int scancode, int keycode)
	295	{
	296	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
	297
	298	if (key && key->type == KE_KEY) {
	299	*keycode = key->keycode;
	300	return 0;
	301	}
	302
	303	return -EINVAL;
	304	}
	305
	306	static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
	307	{
	308	struct key_entry *key;
	309	int old_keycode;
	310
	311	if (keycode < 0 \|\| keycode > KEY_MAX)
	312	return -EINVAL;
	313
	314	key = hp_wmi_get_entry_by_scancode(scancode);
	315	if (key && key->type == KE_KEY) {
	316	old_keycode = key->keycode;
	317	key->keycode = keycode;
	318	set_bit(keycode, dev->keybit);
	319	if (!hp_wmi_get_entry_by_keycode(old_keycode))
	320	clear_bit(old_keycode, dev->keybit);
	321	return 0;
	322	}
	323
	324	return -EINVAL;
	325	}
	326
88429a10	327	static void hp_wmi_notify(u32 value, void *context)
62ec30d4 MG	328	{
	329	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	330	static struct key_entry *key;
	331	union acpi_object *obj;
	332
	333	wmi_get_event_data(value, &response);
	334
	335	obj = (union acpi_object *)response.pointer;
	336
	337	if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
	338	int eventcode = ((u8 ) obj->buffer.pointer);
a8823aef MG	339	if (eventcode == 0x4)
	340	eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
	341	0);
62ec30d4 MG	342	key = hp_wmi_get_entry_by_scancode(eventcode);
	343	if (key) {
	344	switch (key->type) {
	345	case KE_KEY:
	346	input_report_key(hp_wmi_input_dev,
	347	key->keycode, 1);
	348	input_sync(hp_wmi_input_dev);
	349	input_report_key(hp_wmi_input_dev,
	350	key->keycode, 0);
	351	input_sync(hp_wmi_input_dev);
	352	break;
62ec30d4	353	}
871043bc MG	354	} else if (eventcode == 0x1) {
	355	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	356	hp_wmi_dock_state());
	357	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	358	hp_wmi_tablet_state());
	359	input_sync(hp_wmi_input_dev);
62ec30d4 MG	360	} else if (eventcode == 0x5) {
62ec30d4 MG	361	if (wifi_rfkill)
19d337df JB	362	rfkill_set_sw_state(wifi_rfkill,
19d337df JB	363	hp_wmi_wifi_state());
62ec30d4	364	if (bluetooth_rfkill)
19d337df JB	365	rfkill_set_sw_state(bluetooth_rfkill,
19d337df JB	366	hp_wmi_bluetooth_state());
62ec30d4	367	if (wwan_rfkill)
19d337df JB	368	rfkill_set_sw_state(wwan_rfkill,
19d337df JB	369	hp_wmi_wwan_state());
62ec30d4 MG	370	} else
	371	printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
	372	eventcode);
	373	} else
	374	printk(KERN_INFO "HP WMI: Unknown response received\n");
	375	}
	376
	377	static int __init hp_wmi_input_setup(void)
	378	{
	379	struct key_entry *key;
	380	int err;
	381
	382	hp_wmi_input_dev = input_allocate_device();
	383
	384	hp_wmi_input_dev->name = "HP WMI hotkeys";
	385	hp_wmi_input_dev->phys = "wmi/input0";
	386	hp_wmi_input_dev->id.bustype = BUS_HOST;
	387	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	388	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
	389
	390	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
	391	switch (key->type) {
	392	case KE_KEY:
	393	set_bit(EV_KEY, hp_wmi_input_dev->evbit);
	394	set_bit(key->keycode, hp_wmi_input_dev->keybit);
	395	break;
62ec30d4 MG	396	}
	397	}
	398
871043bc MG	399	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	400	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	401	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
	402
	403	/* Set initial hardware state */
	404	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	405	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	406	hp_wmi_tablet_state());
	407	input_sync(hp_wmi_input_dev);
	408
62ec30d4 MG	409	err = input_register_device(hp_wmi_input_dev);
	410
	411	if (err) {
	412	input_free_device(hp_wmi_input_dev);
	413	return err;
	414	}
	415
	416	return 0;
	417	}
	418
	419	static void cleanup_sysfs(struct platform_device *device)
	420	{
	421	device_remove_file(&device->dev, &dev_attr_display);
	422	device_remove_file(&device->dev, &dev_attr_hddtemp);
	423	device_remove_file(&device->dev, &dev_attr_als);
	424	device_remove_file(&device->dev, &dev_attr_dock);
871043bc	425	device_remove_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	426	}
	427
	428	static int __init hp_wmi_bios_setup(struct platform_device *device)
	429	{
	430	int err;
3f6e2f13	431	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
62ec30d4 MG	432
	433	err = device_create_file(&device->dev, &dev_attr_display);
	434	if (err)
	435	goto add_sysfs_error;
	436	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	437	if (err)
	438	goto add_sysfs_error;
	439	err = device_create_file(&device->dev, &dev_attr_als);
	440	if (err)
	441	goto add_sysfs_error;
	442	err = device_create_file(&device->dev, &dev_attr_dock);
871043bc MG	443	if (err)
	444	goto add_sysfs_error;
	445	err = device_create_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	446	if (err)
	447	goto add_sysfs_error;
	448
3f6e2f13	449	if (wireless & 0x1) {
19d337df JB	450	wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
	451	RFKILL_TYPE_WLAN,
	452	&hp_wmi_rfkill_ops,
	453	(void *) 0);
fe8e4e03 LF	454	err = rfkill_register(wifi_rfkill);
fe8e4e03 LF	455	if (err)
19d337df	456	goto register_wifi_error;
3f6e2f13 MG	457	}
	458
	459	if (wireless & 0x2) {
19d337df JB	460	bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
	461	RFKILL_TYPE_BLUETOOTH,
	462	&hp_wmi_rfkill_ops,
	463	(void *) 1);
fe8e4e03	464	err = rfkill_register(bluetooth_rfkill);
6989d565	465	if (err)
fe8e4e03	466	goto register_bluetooth_error;
3f6e2f13 MG	467	}
	468
	469	if (wireless & 0x4) {
19d337df JB	470	wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
	471	RFKILL_TYPE_WWAN,
	472	&hp_wmi_rfkill_ops,
	473	(void *) 2);
fe8e4e03 LF	474	err = rfkill_register(wwan_rfkill);
	475	if (err)
	476	goto register_wwan_err;
3f6e2f13	477	}
62ec30d4 MG	478
62ec30d4 MG	479	return 0;
fe8e4e03	480	register_wwan_err:
19d337df	481	rfkill_destroy(wwan_rfkill);
44f0606d AM	482	if (bluetooth_rfkill)
44f0606d AM	483	rfkill_unregister(bluetooth_rfkill);
fe8e4e03	484	register_bluetooth_error:
19d337df	485	rfkill_destroy(bluetooth_rfkill);
44f0606d AM	486	if (wifi_rfkill)
44f0606d AM	487	rfkill_unregister(wifi_rfkill);
19d337df JB	488	register_wifi_error:
19d337df JB	489	rfkill_destroy(wifi_rfkill);
62ec30d4 MG	490	add_sysfs_error:
	491	cleanup_sysfs(device);
	492	return err;
	493	}
	494
	495	static int __exit hp_wmi_bios_remove(struct platform_device *device)
	496	{
	497	cleanup_sysfs(device);
	498
19d337df	499	if (wifi_rfkill) {
3f6e2f13	500	rfkill_unregister(wifi_rfkill);
19d337df JB	501	rfkill_destroy(wifi_rfkill);
	502	}
	503	if (bluetooth_rfkill) {
3f6e2f13	504	rfkill_unregister(bluetooth_rfkill);
19d337df JB	505	rfkill_destroy(wifi_rfkill);
	506	}
	507	if (wwan_rfkill) {
3f6e2f13	508	rfkill_unregister(wwan_rfkill);
19d337df JB	509	rfkill_destroy(wwan_rfkill);
19d337df JB	510	}
62ec30d4 MG	511
	512	return 0;
	513	}
	514
4c395bdd FP	515	static int hp_wmi_resume_handler(struct platform_device *device)
4c395bdd FP	516	{
4c395bdd	517	/*
871043bc MG	518	* Hardware state may have changed while suspended, so trigger
871043bc MG	519	* input events for the current state. As this is a switch,
4c395bdd FP	520	* the input layer will only actually pass it on if the state
	521	* changed.
	522	*/
daed9537 FP	523	if (hp_wmi_input_dev) {
	524	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	525	hp_wmi_dock_state());
	526	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	527	hp_wmi_tablet_state());
	528	input_sync(hp_wmi_input_dev);
	529	}
4c395bdd FP	530
	531	return 0;
	532	}
	533
62ec30d4 MG	534	static int __init hp_wmi_init(void)
	535	{
	536	int err;
	537
	538	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	539	err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
	540	hp_wmi_notify, NULL);
	541	if (!err)
	542	hp_wmi_input_setup();
	543	}
	544
	545	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
	546	err = platform_driver_register(&hp_wmi_driver);
	547	if (err)
	548	return 0;
	549	hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
	550	if (!hp_wmi_platform_dev) {
	551	platform_driver_unregister(&hp_wmi_driver);
	552	return 0;
	553	}
	554	platform_device_add(hp_wmi_platform_dev);
	555	}
	556
	557	return 0;
	558	}
	559
	560	static void __exit hp_wmi_exit(void)
	561	{
	562	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	563	wmi_remove_notify_handler(HPWMI_EVENT_GUID);
	564	input_unregister_device(hp_wmi_input_dev);
	565	}
	566	if (hp_wmi_platform_dev) {
	567	platform_device_del(hp_wmi_platform_dev);
	568	platform_driver_unregister(&hp_wmi_driver);
	569	}
	570	}
	571
	572	module_init(hp_wmi_init);
	573	module_exit(hp_wmi_exit);