[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 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 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 || 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(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);
	}

	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);
8dd2b426	56	static int hp_wmi_resume_handler(struct 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
8dd2b426 FP	97	static struct dev_pm_ops hp_wmi_pm_ops = {
	98	.resume = hp_wmi_resume_handler,
	99	.restore = hp_wmi_resume_handler,
	100	};
	101
62ec30d4 MG	102	static struct platform_driver hp_wmi_driver = {
62ec30d4 MG	103	.driver = {
8dd2b426 FP	104	.name = "hp-wmi",
	105	.owner = THIS_MODULE,
	106	.pm = &hp_wmi_pm_ops,
62ec30d4 MG	107	},
	108	.probe = hp_wmi_bios_setup,
	109	.remove = hp_wmi_bios_remove,
	110	};
	111
	112	static int hp_wmi_perform_query(int query, int write, int value)
	113	{
	114	struct bios_return bios_return;
	115	acpi_status status;
	116	union acpi_object *obj;
	117	struct bios_args args = {
	118	.signature = 0x55434553,
	119	.command = write ? 0x2 : 0x1,
	120	.commandtype = query,
	121	.datasize = write ? 0x4 : 0,
	122	.data = value,
	123	};
	124	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	125	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	126
	127	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
	128
	129	obj = output.pointer;
	130
	131	if (!obj \|\| obj->type != ACPI_TYPE_BUFFER)
	132	return -EINVAL;
	133
	134	bios_return = ((struct bios_return )obj->buffer.pointer);
	135	if (bios_return.return_code > 0)
	136	return bios_return.return_code * -1;
	137	else
	138	return bios_return.value;
	139	}
	140
	141	static int hp_wmi_display_state(void)
	142	{
	143	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
	144	}
	145
	146	static int hp_wmi_hddtemp_state(void)
	147	{
	148	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
	149	}
	150
	151	static int hp_wmi_als_state(void)
	152	{
	153	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
	154	}
	155
	156	static int hp_wmi_dock_state(void)
	157	{
871043bc	158	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
62ec30d4	159
871043bc MG	160	if (ret < 0)
	161	return ret;
	162
	163	return ret & 0x1;
62ec30d4 MG	164	}
62ec30d4 MG	165
871043bc	166	static int hp_wmi_tablet_state(void)
62ec30d4	167	{
871043bc MG	168	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
	169
	170	if (ret < 0)
	171	return ret;
	172
	173	return (ret & 0x4) ? 1 : 0;
62ec30d4 MG	174	}
62ec30d4 MG	175
19d337df	176	static int hp_wmi_set_block(void *data, bool blocked)
62ec30d4	177	{
19d337df	178	unsigned long b = (unsigned long) data;
76d8b64e	179	int query = BIT(b + 8) \| ((!blocked) << b);
62ec30d4	180
19d337df	181	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
62ec30d4 MG	182	}
62ec30d4 MG	183
19d337df JB	184	static const struct rfkill_ops hp_wmi_rfkill_ops = {
	185	.set_block = hp_wmi_set_block,
	186	};
62ec30d4	187
19d337df	188	static bool hp_wmi_wifi_state(void)
62ec30d4 MG	189	{
	190	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	191
	192	if (wireless & 0x100)
19d337df	193	return false;
62ec30d4	194	else
19d337df	195	return true;
62ec30d4 MG	196	}
62ec30d4 MG	197
19d337df	198	static bool hp_wmi_bluetooth_state(void)
62ec30d4 MG	199	{
	200	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	201
	202	if (wireless & 0x10000)
19d337df	203	return false;
62ec30d4	204	else
19d337df	205	return true;
62ec30d4 MG	206	}
62ec30d4 MG	207
19d337df	208	static bool hp_wmi_wwan_state(void)
62ec30d4 MG	209	{
	210	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
	211
	212	if (wireless & 0x1000000)
19d337df	213	return false;
62ec30d4	214	else
19d337df	215	return true;
62ec30d4 MG	216	}
	217
	218	static ssize_t show_display(struct device dev, struct device_attribute attr,
	219	char *buf)
	220	{
	221	int value = hp_wmi_display_state();
	222	if (value < 0)
	223	return -EINVAL;
	224	return sprintf(buf, "%d\n", value);
	225	}
	226
	227	static ssize_t show_hddtemp(struct device dev, struct device_attribute attr,
	228	char *buf)
	229	{
	230	int value = hp_wmi_hddtemp_state();
	231	if (value < 0)
	232	return -EINVAL;
	233	return sprintf(buf, "%d\n", value);
	234	}
	235
	236	static ssize_t show_als(struct device dev, struct device_attribute attr,
	237	char *buf)
	238	{
	239	int value = hp_wmi_als_state();
	240	if (value < 0)
	241	return -EINVAL;
	242	return sprintf(buf, "%d\n", value);
	243	}
	244
	245	static ssize_t show_dock(struct device dev, struct device_attribute attr,
	246	char *buf)
	247	{
	248	int value = hp_wmi_dock_state();
	249	if (value < 0)
	250	return -EINVAL;
	251	return sprintf(buf, "%d\n", value);
	252	}
	253
871043bc MG	254	static ssize_t show_tablet(struct device dev, struct device_attribute attr,
	255	char *buf)
	256	{
	257	int value = hp_wmi_tablet_state();
	258	if (value < 0)
	259	return -EINVAL;
	260	return sprintf(buf, "%d\n", value);
	261	}
	262
62ec30d4 MG	263	static ssize_t set_als(struct device dev, struct device_attribute attr,
	264	const char *buf, size_t count)
	265	{
	266	u32 tmp = simple_strtoul(buf, NULL, 10);
	267	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	268	return count;
	269	}
	270
	271	static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
	272	static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
	273	static DEVICE_ATTR(als, S_IRUGO \| S_IWUSR, show_als, set_als);
	274	static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
871043bc	275	static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
62ec30d4 MG	276
	277	static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
	278	{
	279	struct key_entry *key;
	280
	281	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	282	if (code == key->code)
	283	return key;
	284
	285	return NULL;
	286	}
	287
	288	static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
	289	{
	290	struct key_entry *key;
	291
	292	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	293	if (key->type == KE_KEY && keycode == key->keycode)
	294	return key;
	295
	296	return NULL;
	297	}
	298
	299	static int hp_wmi_getkeycode(struct input_dev dev, int scancode, int keycode)
	300	{
	301	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
	302
	303	if (key && key->type == KE_KEY) {
	304	*keycode = key->keycode;
	305	return 0;
	306	}
	307
	308	return -EINVAL;
	309	}
	310
	311	static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
	312	{
	313	struct key_entry *key;
	314	int old_keycode;
	315
	316	if (keycode < 0 \|\| keycode > KEY_MAX)
	317	return -EINVAL;
	318
	319	key = hp_wmi_get_entry_by_scancode(scancode);
	320	if (key && key->type == KE_KEY) {
	321	old_keycode = key->keycode;
	322	key->keycode = keycode;
	323	set_bit(keycode, dev->keybit);
	324	if (!hp_wmi_get_entry_by_keycode(old_keycode))
	325	clear_bit(old_keycode, dev->keybit);
	326	return 0;
	327	}
	328
	329	return -EINVAL;
	330	}
	331
88429a10	332	static void hp_wmi_notify(u32 value, void *context)
62ec30d4 MG	333	{
	334	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	335	static struct key_entry *key;
	336	union acpi_object *obj;
	337
	338	wmi_get_event_data(value, &response);
	339
	340	obj = (union acpi_object *)response.pointer;
	341
	342	if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
	343	int eventcode = ((u8 ) obj->buffer.pointer);
a8823aef MG	344	if (eventcode == 0x4)
	345	eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
	346	0);
62ec30d4 MG	347	key = hp_wmi_get_entry_by_scancode(eventcode);
	348	if (key) {
	349	switch (key->type) {
	350	case KE_KEY:
	351	input_report_key(hp_wmi_input_dev,
	352	key->keycode, 1);
	353	input_sync(hp_wmi_input_dev);
	354	input_report_key(hp_wmi_input_dev,
	355	key->keycode, 0);
	356	input_sync(hp_wmi_input_dev);
	357	break;
62ec30d4	358	}
871043bc MG	359	} else if (eventcode == 0x1) {
	360	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	361	hp_wmi_dock_state());
	362	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	363	hp_wmi_tablet_state());
	364	input_sync(hp_wmi_input_dev);
62ec30d4 MG	365	} else if (eventcode == 0x5) {
62ec30d4 MG	366	if (wifi_rfkill)
19d337df JB	367	rfkill_set_sw_state(wifi_rfkill,
19d337df JB	368	hp_wmi_wifi_state());
62ec30d4	369	if (bluetooth_rfkill)
19d337df JB	370	rfkill_set_sw_state(bluetooth_rfkill,
19d337df JB	371	hp_wmi_bluetooth_state());
62ec30d4	372	if (wwan_rfkill)
19d337df JB	373	rfkill_set_sw_state(wwan_rfkill,
19d337df JB	374	hp_wmi_wwan_state());
62ec30d4 MG	375	} else
	376	printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
	377	eventcode);
	378	} else
	379	printk(KERN_INFO "HP WMI: Unknown response received\n");
	380	}
	381
	382	static int __init hp_wmi_input_setup(void)
	383	{
	384	struct key_entry *key;
	385	int err;
	386
	387	hp_wmi_input_dev = input_allocate_device();
	388
	389	hp_wmi_input_dev->name = "HP WMI hotkeys";
	390	hp_wmi_input_dev->phys = "wmi/input0";
	391	hp_wmi_input_dev->id.bustype = BUS_HOST;
	392	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	393	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
	394
	395	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
	396	switch (key->type) {
	397	case KE_KEY:
	398	set_bit(EV_KEY, hp_wmi_input_dev->evbit);
	399	set_bit(key->keycode, hp_wmi_input_dev->keybit);
	400	break;
62ec30d4 MG	401	}
	402	}
	403
871043bc MG	404	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	405	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	406	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
	407
	408	/* Set initial hardware state */
	409	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	410	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	411	hp_wmi_tablet_state());
	412	input_sync(hp_wmi_input_dev);
	413
62ec30d4 MG	414	err = input_register_device(hp_wmi_input_dev);
	415
	416	if (err) {
	417	input_free_device(hp_wmi_input_dev);
	418	return err;
	419	}
	420
	421	return 0;
	422	}
	423
	424	static void cleanup_sysfs(struct platform_device *device)
	425	{
	426	device_remove_file(&device->dev, &dev_attr_display);
	427	device_remove_file(&device->dev, &dev_attr_hddtemp);
	428	device_remove_file(&device->dev, &dev_attr_als);
	429	device_remove_file(&device->dev, &dev_attr_dock);
871043bc	430	device_remove_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	431	}
	432
	433	static int __init hp_wmi_bios_setup(struct platform_device *device)
	434	{
	435	int err;
3f6e2f13	436	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
62ec30d4 MG	437
	438	err = device_create_file(&device->dev, &dev_attr_display);
	439	if (err)
	440	goto add_sysfs_error;
	441	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	442	if (err)
	443	goto add_sysfs_error;
	444	err = device_create_file(&device->dev, &dev_attr_als);
	445	if (err)
	446	goto add_sysfs_error;
	447	err = device_create_file(&device->dev, &dev_attr_dock);
871043bc MG	448	if (err)
	449	goto add_sysfs_error;
	450	err = device_create_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	451	if (err)
	452	goto add_sysfs_error;
	453
3f6e2f13	454	if (wireless & 0x1) {
19d337df JB	455	wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
	456	RFKILL_TYPE_WLAN,
	457	&hp_wmi_rfkill_ops,
	458	(void *) 0);
fe8e4e03 LF	459	err = rfkill_register(wifi_rfkill);
fe8e4e03 LF	460	if (err)
19d337df	461	goto register_wifi_error;
3f6e2f13 MG	462	}
	463
	464	if (wireless & 0x2) {
19d337df JB	465	bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
	466	RFKILL_TYPE_BLUETOOTH,
	467	&hp_wmi_rfkill_ops,
	468	(void *) 1);
fe8e4e03	469	err = rfkill_register(bluetooth_rfkill);
6989d565	470	if (err)
fe8e4e03	471	goto register_bluetooth_error;
3f6e2f13 MG	472	}
	473
	474	if (wireless & 0x4) {
19d337df JB	475	wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
	476	RFKILL_TYPE_WWAN,
	477	&hp_wmi_rfkill_ops,
	478	(void *) 2);
fe8e4e03 LF	479	err = rfkill_register(wwan_rfkill);
	480	if (err)
	481	goto register_wwan_err;
3f6e2f13	482	}
62ec30d4 MG	483
62ec30d4 MG	484	return 0;
fe8e4e03	485	register_wwan_err:
19d337df	486	rfkill_destroy(wwan_rfkill);
44f0606d AM	487	if (bluetooth_rfkill)
44f0606d AM	488	rfkill_unregister(bluetooth_rfkill);
fe8e4e03	489	register_bluetooth_error:
19d337df	490	rfkill_destroy(bluetooth_rfkill);
44f0606d AM	491	if (wifi_rfkill)
44f0606d AM	492	rfkill_unregister(wifi_rfkill);
19d337df JB	493	register_wifi_error:
19d337df JB	494	rfkill_destroy(wifi_rfkill);
62ec30d4 MG	495	add_sysfs_error:
	496	cleanup_sysfs(device);
	497	return err;
	498	}
	499
	500	static int __exit hp_wmi_bios_remove(struct platform_device *device)
	501	{
	502	cleanup_sysfs(device);
	503
19d337df	504	if (wifi_rfkill) {
3f6e2f13	505	rfkill_unregister(wifi_rfkill);
19d337df JB	506	rfkill_destroy(wifi_rfkill);
	507	}
	508	if (bluetooth_rfkill) {
3f6e2f13	509	rfkill_unregister(bluetooth_rfkill);
09729f0b	510	rfkill_destroy(bluetooth_rfkill);
19d337df JB	511	}
19d337df JB	512	if (wwan_rfkill) {
3f6e2f13	513	rfkill_unregister(wwan_rfkill);
19d337df JB	514	rfkill_destroy(wwan_rfkill);
19d337df JB	515	}
62ec30d4 MG	516
	517	return 0;
	518	}
	519
8dd2b426	520	static int hp_wmi_resume_handler(struct device *device)
4c395bdd	521	{
4c395bdd	522	/*
871043bc MG	523	* Hardware state may have changed while suspended, so trigger
871043bc MG	524	* input events for the current state. As this is a switch,
4c395bdd FP	525	* the input layer will only actually pass it on if the state
	526	* changed.
	527	*/
daed9537 FP	528	if (hp_wmi_input_dev) {
	529	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	530	hp_wmi_dock_state());
	531	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	532	hp_wmi_tablet_state());
	533	input_sync(hp_wmi_input_dev);
	534	}
4c395bdd FP	535
	536	return 0;
	537	}
	538
62ec30d4 MG	539	static int __init hp_wmi_init(void)
	540	{
	541	int err;
	542
	543	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	544	err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
	545	hp_wmi_notify, NULL);
	546	if (!err)
	547	hp_wmi_input_setup();
	548	}
	549
	550	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
	551	err = platform_driver_register(&hp_wmi_driver);
	552	if (err)
	553	return 0;
	554	hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
	555	if (!hp_wmi_platform_dev) {
	556	platform_driver_unregister(&hp_wmi_driver);
	557	return 0;
	558	}
	559	platform_device_add(hp_wmi_platform_dev);
	560	}
	561
	562	return 0;
	563	}
	564
	565	static void __exit hp_wmi_exit(void)
	566	{
	567	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	568	wmi_remove_notify_handler(HPWMI_EVENT_GUID);
	569	input_unregister_device(hp_wmi_input_dev);
	570	}
	571	if (hp_wmi_platform_dev) {
	572	platform_device_del(hp_wmi_platform_dev);
	573	platform_driver_unregister(&hp_wmi_driver);
	574	}
	575	}
	576
	577	module_init(hp_wmi_init);
	578	module_exit(hp_wmi_exit);