[net-next-2.6.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

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

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, 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;
	int eventcode;
	acpi_status status;

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

	obj = (union acpi_object *)response.pointer;

	if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length != 8) {
		printk(KERN_INFO "HP WMI: Unknown response received\n");
		kfree(obj);
		return;
	}

	eventcode = *((u8 *) obj->buffer.pointer);
	kfree(obj);
	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_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));
	} else
		printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
			eventcode);
}

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
e5fbba85 AJ	55	enum hp_wmi_radio {
	56	HPWMI_WIFI = 0,
	57	HPWMI_BLUETOOTH = 1,
	58	HPWMI_WWAN = 2,
	59	};
	60
ea79632d	61	static int __devinit hp_wmi_bios_setup(struct platform_device *device);
62ec30d4	62	static int __exit hp_wmi_bios_remove(struct platform_device *device);
8dd2b426	63	static int hp_wmi_resume_handler(struct device *device);
62ec30d4 MG	64
	65	struct bios_args {
	66	u32 signature;
	67	u32 command;
	68	u32 commandtype;
	69	u32 datasize;
	70	u32 data;
	71	};
	72
	73	struct bios_return {
	74	u32 sigpass;
	75	u32 return_code;
	76	u32 value;
	77	};
	78
	79	struct key_entry {
	80	char type; /* See KE_* below */
a8823aef	81	u16 code;
62ec30d4 MG	82	u16 keycode;
	83	};
	84
871043bc	85	enum { KE_KEY, KE_END };
62ec30d4 MG	86
62ec30d4 MG	87	static struct key_entry hp_wmi_keymap[] = {
62ec30d4 MG	88	{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
62ec30d4 MG	89	{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
a8823aef MG	90	{KE_KEY, 0x20e6, KEY_PROG1},
a8823aef MG	91	{KE_KEY, 0x2142, KEY_MEDIA},
5c624841	92	{KE_KEY, 0x213b, KEY_INFO},
caeacf59	93	{KE_KEY, 0x2169, KEY_DIRECTION},
a8823aef	94	{KE_KEY, 0x231b, KEY_HELP},
62ec30d4 MG	95	{KE_END, 0}
	96	};
	97
	98	static struct input_dev *hp_wmi_input_dev;
	99	static struct platform_device *hp_wmi_platform_dev;
	100
	101	static struct rfkill *wifi_rfkill;
	102	static struct rfkill *bluetooth_rfkill;
	103	static struct rfkill *wwan_rfkill;
	104
47145210	105	static const struct dev_pm_ops hp_wmi_pm_ops = {
8dd2b426 FP	106	.resume = hp_wmi_resume_handler,
	107	.restore = hp_wmi_resume_handler,
	108	};
	109
62ec30d4 MG	110	static struct platform_driver hp_wmi_driver = {
62ec30d4 MG	111	.driver = {
8dd2b426 FP	112	.name = "hp-wmi",
	113	.owner = THIS_MODULE,
	114	.pm = &hp_wmi_pm_ops,
62ec30d4 MG	115	},
	116	.probe = hp_wmi_bios_setup,
	117	.remove = hp_wmi_bios_remove,
	118	};
	119
	120	static int hp_wmi_perform_query(int query, int write, int value)
	121	{
	122	struct bios_return bios_return;
	123	acpi_status status;
	124	union acpi_object *obj;
	125	struct bios_args args = {
	126	.signature = 0x55434553,
	127	.command = write ? 0x2 : 0x1,
	128	.commandtype = query,
	129	.datasize = write ? 0x4 : 0,
	130	.data = value,
	131	};
	132	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	133	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	134
	135	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
	136
	137	obj = output.pointer;
	138
44ef00e6	139	if (!obj)
62ec30d4	140	return -EINVAL;
44ef00e6 TR	141	else if (obj->type != ACPI_TYPE_BUFFER) {
	142	kfree(obj);
	143	return -EINVAL;
	144	}
62ec30d4 MG	145
62ec30d4 MG	146	bios_return = ((struct bios_return )obj->buffer.pointer);
44ef00e6	147	kfree(obj);
62ec30d4 MG	148	if (bios_return.return_code > 0)
	149	return bios_return.return_code * -1;
	150	else
	151	return bios_return.value;
	152	}
	153
	154	static int hp_wmi_display_state(void)
	155	{
	156	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
	157	}
	158
	159	static int hp_wmi_hddtemp_state(void)
	160	{
	161	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
	162	}
	163
	164	static int hp_wmi_als_state(void)
	165	{
	166	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
	167	}
	168
	169	static int hp_wmi_dock_state(void)
	170	{
871043bc	171	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
62ec30d4	172
871043bc MG	173	if (ret < 0)
	174	return ret;
	175
	176	return ret & 0x1;
62ec30d4 MG	177	}
62ec30d4 MG	178
871043bc	179	static int hp_wmi_tablet_state(void)
62ec30d4	180	{
871043bc MG	181	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
	182
	183	if (ret < 0)
	184	return ret;
	185
	186	return (ret & 0x4) ? 1 : 0;
62ec30d4 MG	187	}
62ec30d4 MG	188
19d337df	189	static int hp_wmi_set_block(void *data, bool blocked)
62ec30d4	190	{
e5fbba85 AJ	191	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
e5fbba85 AJ	192	int query = BIT(r + 8) \| ((!blocked) << r);
62ec30d4	193
19d337df	194	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
62ec30d4 MG	195	}
62ec30d4 MG	196
19d337df JB	197	static const struct rfkill_ops hp_wmi_rfkill_ops = {
	198	.set_block = hp_wmi_set_block,
	199	};
62ec30d4	200
e5fbba85	201	static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
62ec30d4 MG	202	{
62ec30d4 MG	203	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	204	int mask = 0x200 << (r * 8);
62ec30d4	205
e5fbba85	206	if (wireless & mask)
19d337df	207	return false;
62ec30d4	208	else
19d337df	209	return true;
62ec30d4 MG	210	}
62ec30d4 MG	211
e5fbba85	212	static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
62ec30d4 MG	213	{
62ec30d4 MG	214	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	215	int mask = 0x800 << (r * 8);
62ec30d4	216
e5fbba85	217	if (wireless & mask)
19d337df	218	return false;
62ec30d4	219	else
19d337df	220	return true;
62ec30d4 MG	221	}
	222
	223	static ssize_t show_display(struct device dev, struct device_attribute attr,
	224	char *buf)
	225	{
	226	int value = hp_wmi_display_state();
	227	if (value < 0)
	228	return -EINVAL;
	229	return sprintf(buf, "%d\n", value);
	230	}
	231
	232	static ssize_t show_hddtemp(struct device dev, struct device_attribute attr,
	233	char *buf)
	234	{
	235	int value = hp_wmi_hddtemp_state();
	236	if (value < 0)
	237	return -EINVAL;
	238	return sprintf(buf, "%d\n", value);
	239	}
	240
	241	static ssize_t show_als(struct device dev, struct device_attribute attr,
	242	char *buf)
	243	{
	244	int value = hp_wmi_als_state();
	245	if (value < 0)
	246	return -EINVAL;
	247	return sprintf(buf, "%d\n", value);
	248	}
	249
	250	static ssize_t show_dock(struct device dev, struct device_attribute attr,
	251	char *buf)
	252	{
	253	int value = hp_wmi_dock_state();
	254	if (value < 0)
	255	return -EINVAL;
	256	return sprintf(buf, "%d\n", value);
	257	}
	258
871043bc MG	259	static ssize_t show_tablet(struct device dev, struct device_attribute attr,
	260	char *buf)
	261	{
	262	int value = hp_wmi_tablet_state();
	263	if (value < 0)
	264	return -EINVAL;
	265	return sprintf(buf, "%d\n", value);
	266	}
	267
62ec30d4 MG	268	static ssize_t set_als(struct device dev, struct device_attribute attr,
	269	const char *buf, size_t count)
	270	{
	271	u32 tmp = simple_strtoul(buf, NULL, 10);
	272	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	273	return count;
	274	}
	275
	276	static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
	277	static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
	278	static DEVICE_ATTR(als, S_IRUGO \| S_IWUSR, show_als, set_als);
	279	static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
871043bc	280	static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
62ec30d4	281
58b93995	282	static struct key_entry *hp_wmi_get_entry_by_scancode(unsigned int code)
62ec30d4 MG	283	{
	284	struct key_entry *key;
	285
	286	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	287	if (code == key->code)
	288	return key;
	289
	290	return NULL;
	291	}
	292
58b93995	293	static struct key_entry *hp_wmi_get_entry_by_keycode(unsigned int keycode)
62ec30d4 MG	294	{
	295	struct key_entry *key;
	296
	297	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	298	if (key->type == KE_KEY && keycode == key->keycode)
	299	return key;
	300
	301	return NULL;
	302	}
	303
58b93995 DT	304	static int hp_wmi_getkeycode(struct input_dev *dev,
58b93995 DT	305	unsigned int scancode, unsigned int *keycode)
62ec30d4 MG	306	{
	307	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
	308
	309	if (key && key->type == KE_KEY) {
	310	*keycode = key->keycode;
	311	return 0;
	312	}
	313
	314	return -EINVAL;
	315	}
	316
58b93995 DT	317	static int hp_wmi_setkeycode(struct input_dev *dev,
58b93995 DT	318	unsigned int scancode, unsigned int keycode)
62ec30d4 MG	319	{
62ec30d4 MG	320	struct key_entry *key;
58b93995	321	unsigned int old_keycode;
62ec30d4 MG	322
	323	key = hp_wmi_get_entry_by_scancode(scancode);
	324	if (key && key->type == KE_KEY) {
	325	old_keycode = key->keycode;
	326	key->keycode = keycode;
	327	set_bit(keycode, dev->keybit);
	328	if (!hp_wmi_get_entry_by_keycode(old_keycode))
	329	clear_bit(old_keycode, dev->keybit);
	330	return 0;
	331	}
	332
	333	return -EINVAL;
	334	}
	335
88429a10	336	static void hp_wmi_notify(u32 value, void *context)
62ec30d4 MG	337	{
	338	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	339	static struct key_entry *key;
	340	union acpi_object *obj;
e5fbba85	341	int eventcode;
fda11e61	342	acpi_status status;
62ec30d4	343
fda11e61 LB	344	status = wmi_get_event_data(value, &response);
	345	if (status != AE_OK) {
	346	printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status);
	347	return;
	348	}
62ec30d4 MG	349
	350	obj = (union acpi_object *)response.pointer;
	351
e5fbba85 AJ	352	if (!obj \|\| obj->type != ACPI_TYPE_BUFFER \|\| obj->buffer.length != 8) {
e5fbba85 AJ	353	printk(KERN_INFO "HP WMI: Unknown response received\n");
44ef00e6	354	kfree(obj);
e5fbba85 AJ	355	return;
	356	}
	357
	358	eventcode = ((u8 ) obj->buffer.pointer);
44ef00e6	359	kfree(obj);
e5fbba85 AJ	360	if (eventcode == 0x4)
	361	eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
	362	0);
	363	key = hp_wmi_get_entry_by_scancode(eventcode);
	364	if (key) {
	365	switch (key->type) {
	366	case KE_KEY:
	367	input_report_key(hp_wmi_input_dev,
	368	key->keycode, 1);
	369	input_sync(hp_wmi_input_dev);
	370	input_report_key(hp_wmi_input_dev,
	371	key->keycode, 0);
871043bc	372	input_sync(hp_wmi_input_dev);
e5fbba85 AJ	373	break;
	374	}
	375	} else if (eventcode == 0x1) {
	376	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	377	hp_wmi_dock_state());
	378	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	379	hp_wmi_tablet_state());
	380	input_sync(hp_wmi_input_dev);
	381	} else if (eventcode == 0x5) {
	382	if (wifi_rfkill)
	383	rfkill_set_states(wifi_rfkill,
	384	hp_wmi_get_sw_state(HPWMI_WIFI),
	385	hp_wmi_get_hw_state(HPWMI_WIFI));
	386	if (bluetooth_rfkill)
	387	rfkill_set_states(bluetooth_rfkill,
	388	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	389	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	390	if (wwan_rfkill)
	391	rfkill_set_states(wwan_rfkill,
	392	hp_wmi_get_sw_state(HPWMI_WWAN),
	393	hp_wmi_get_hw_state(HPWMI_WWAN));
62ec30d4	394	} else
e5fbba85 AJ	395	printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
e5fbba85 AJ	396	eventcode);
62ec30d4 MG	397	}
	398
	399	static int __init hp_wmi_input_setup(void)
	400	{
	401	struct key_entry *key;
	402	int err;
	403
	404	hp_wmi_input_dev = input_allocate_device();
	405
	406	hp_wmi_input_dev->name = "HP WMI hotkeys";
	407	hp_wmi_input_dev->phys = "wmi/input0";
	408	hp_wmi_input_dev->id.bustype = BUS_HOST;
	409	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	410	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
	411
	412	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
	413	switch (key->type) {
	414	case KE_KEY:
	415	set_bit(EV_KEY, hp_wmi_input_dev->evbit);
	416	set_bit(key->keycode, hp_wmi_input_dev->keybit);
	417	break;
62ec30d4 MG	418	}
	419	}
	420
871043bc MG	421	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	422	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	423	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
	424
	425	/* Set initial hardware state */
	426	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	427	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	428	hp_wmi_tablet_state());
	429	input_sync(hp_wmi_input_dev);
	430
62ec30d4 MG	431	err = input_register_device(hp_wmi_input_dev);
	432
	433	if (err) {
	434	input_free_device(hp_wmi_input_dev);
	435	return err;
	436	}
	437
	438	return 0;
	439	}
	440
	441	static void cleanup_sysfs(struct platform_device *device)
	442	{
	443	device_remove_file(&device->dev, &dev_attr_display);
	444	device_remove_file(&device->dev, &dev_attr_hddtemp);
	445	device_remove_file(&device->dev, &dev_attr_als);
	446	device_remove_file(&device->dev, &dev_attr_dock);
871043bc	447	device_remove_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	448	}
62ec30d4 MG	449
ea79632d	450	static int __devinit hp_wmi_bios_setup(struct platform_device *device)
62ec30d4 MG	451	{
62ec30d4 MG	452	int err;
3f6e2f13	453	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
62ec30d4 MG	454
	455	err = device_create_file(&device->dev, &dev_attr_display);
	456	if (err)
	457	goto add_sysfs_error;
	458	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	459	if (err)
	460	goto add_sysfs_error;
	461	err = device_create_file(&device->dev, &dev_attr_als);
	462	if (err)
	463	goto add_sysfs_error;
	464	err = device_create_file(&device->dev, &dev_attr_dock);
871043bc MG	465	if (err)
	466	goto add_sysfs_error;
	467	err = device_create_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	468	if (err)
	469	goto add_sysfs_error;
	470
3f6e2f13	471	if (wireless & 0x1) {
19d337df JB	472	wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
	473	RFKILL_TYPE_WLAN,
	474	&hp_wmi_rfkill_ops,
e5fbba85 AJ	475	(void *) HPWMI_WIFI);
	476	rfkill_init_sw_state(wifi_rfkill,
	477	hp_wmi_get_sw_state(HPWMI_WIFI));
	478	rfkill_set_hw_state(wifi_rfkill,
	479	hp_wmi_get_hw_state(HPWMI_WIFI));
fe8e4e03 LF	480	err = rfkill_register(wifi_rfkill);
fe8e4e03 LF	481	if (err)
19d337df	482	goto register_wifi_error;
3f6e2f13 MG	483	}
	484
	485	if (wireless & 0x2) {
19d337df JB	486	bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
	487	RFKILL_TYPE_BLUETOOTH,
	488	&hp_wmi_rfkill_ops,
e5fbba85 AJ	489	(void *) HPWMI_BLUETOOTH);
	490	rfkill_init_sw_state(bluetooth_rfkill,
	491	hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
	492	rfkill_set_hw_state(bluetooth_rfkill,
	493	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
fe8e4e03	494	err = rfkill_register(bluetooth_rfkill);
6989d565	495	if (err)
fe8e4e03	496	goto register_bluetooth_error;
3f6e2f13 MG	497	}
	498
	499	if (wireless & 0x4) {
19d337df JB	500	wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
	501	RFKILL_TYPE_WWAN,
	502	&hp_wmi_rfkill_ops,
e5fbba85 AJ	503	(void *) HPWMI_WWAN);
	504	rfkill_init_sw_state(wwan_rfkill,
	505	hp_wmi_get_sw_state(HPWMI_WWAN));
	506	rfkill_set_hw_state(wwan_rfkill,
	507	hp_wmi_get_hw_state(HPWMI_WWAN));
fe8e4e03 LF	508	err = rfkill_register(wwan_rfkill);
	509	if (err)
	510	goto register_wwan_err;
3f6e2f13	511	}
62ec30d4 MG	512
62ec30d4 MG	513	return 0;
fe8e4e03	514	register_wwan_err:
19d337df	515	rfkill_destroy(wwan_rfkill);
44f0606d AM	516	if (bluetooth_rfkill)
44f0606d AM	517	rfkill_unregister(bluetooth_rfkill);
fe8e4e03	518	register_bluetooth_error:
19d337df	519	rfkill_destroy(bluetooth_rfkill);
44f0606d AM	520	if (wifi_rfkill)
44f0606d AM	521	rfkill_unregister(wifi_rfkill);
19d337df JB	522	register_wifi_error:
19d337df JB	523	rfkill_destroy(wifi_rfkill);
62ec30d4 MG	524	add_sysfs_error:
	525	cleanup_sysfs(device);
	526	return err;
	527	}
	528
	529	static int __exit hp_wmi_bios_remove(struct platform_device *device)
	530	{
	531	cleanup_sysfs(device);
	532
19d337df	533	if (wifi_rfkill) {
3f6e2f13	534	rfkill_unregister(wifi_rfkill);
19d337df JB	535	rfkill_destroy(wifi_rfkill);
	536	}
	537	if (bluetooth_rfkill) {
3f6e2f13	538	rfkill_unregister(bluetooth_rfkill);
09729f0b	539	rfkill_destroy(bluetooth_rfkill);
19d337df JB	540	}
19d337df JB	541	if (wwan_rfkill) {
3f6e2f13	542	rfkill_unregister(wwan_rfkill);
19d337df JB	543	rfkill_destroy(wwan_rfkill);
19d337df JB	544	}
62ec30d4 MG	545
	546	return 0;
	547	}
	548
8dd2b426	549	static int hp_wmi_resume_handler(struct device *device)
4c395bdd	550	{
4c395bdd	551	/*
871043bc MG	552	* Hardware state may have changed while suspended, so trigger
871043bc MG	553	* input events for the current state. As this is a switch,
4c395bdd FP	554	* the input layer will only actually pass it on if the state
	555	* changed.
	556	*/
daed9537 FP	557	if (hp_wmi_input_dev) {
	558	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	559	hp_wmi_dock_state());
	560	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	561	hp_wmi_tablet_state());
	562	input_sync(hp_wmi_input_dev);
	563	}
4c395bdd	564
e5fbba85 AJ	565	if (wifi_rfkill)
	566	rfkill_set_states(wifi_rfkill,
	567	hp_wmi_get_sw_state(HPWMI_WIFI),
	568	hp_wmi_get_hw_state(HPWMI_WIFI));
	569	if (bluetooth_rfkill)
	570	rfkill_set_states(bluetooth_rfkill,
	571	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	572	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	573	if (wwan_rfkill)
	574	rfkill_set_states(wwan_rfkill,
	575	hp_wmi_get_sw_state(HPWMI_WWAN),
	576	hp_wmi_get_hw_state(HPWMI_WWAN));
	577
4c395bdd FP	578	return 0;
	579	}
	580
62ec30d4 MG	581	static int __init hp_wmi_init(void)
	582	{
	583	int err;
	584
	585	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	586	err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
	587	hp_wmi_notify, NULL);
f2772575	588	if (ACPI_SUCCESS(err))
62ec30d4 MG	589	hp_wmi_input_setup();
	590	}
	591
	592	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
	593	err = platform_driver_register(&hp_wmi_driver);
	594	if (err)
	595	return 0;
	596	hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
	597	if (!hp_wmi_platform_dev) {
	598	platform_driver_unregister(&hp_wmi_driver);
	599	return 0;
	600	}
	601	platform_device_add(hp_wmi_platform_dev);
	602	}
	603
	604	return 0;
	605	}
	606
	607	static void __exit hp_wmi_exit(void)
	608	{
	609	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	610	wmi_remove_notify_handler(HPWMI_EVENT_GUID);
	611	input_unregister_device(hp_wmi_input_dev);
	612	}
	613	if (hp_wmi_platform_dev) {
	614	platform_device_del(hp_wmi_platform_dev);
	615	platform_driver_unregister(&hp_wmi_driver);
	616	}
	617	}
	618
	619	module_init(hp_wmi_init);
	620	module_exit(hp_wmi_exit);