[linux-2.6-block.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

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

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 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(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;
	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 __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 *) 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>
	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	53
e5fbba85 AJ	54	enum hp_wmi_radio {
	55	HPWMI_WIFI = 0,
	56	HPWMI_BLUETOOTH = 1,
	57	HPWMI_WWAN = 2,
	58	};
	59
62ec30d4 MG	60	static int __init hp_wmi_bios_setup(struct platform_device *device);
62ec30d4 MG	61	static int __exit hp_wmi_bios_remove(struct platform_device *device);
8dd2b426	62	static int hp_wmi_resume_handler(struct device *device);
62ec30d4 MG	63
	64	struct bios_args {
	65	u32 signature;
	66	u32 command;
	67	u32 commandtype;
	68	u32 datasize;
	69	u32 data;
	70	};
	71
	72	struct bios_return {
	73	u32 sigpass;
	74	u32 return_code;
	75	u32 value;
	76	};
	77
	78	struct key_entry {
	79	char type; /* See KE_* below */
a8823aef	80	u16 code;
62ec30d4 MG	81	u16 keycode;
	82	};
	83
871043bc	84	enum { KE_KEY, KE_END };
62ec30d4 MG	85
62ec30d4 MG	86	static struct key_entry hp_wmi_keymap[] = {
62ec30d4 MG	87	{KE_KEY, 0x02, KEY_BRIGHTNESSUP},
62ec30d4 MG	88	{KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
a8823aef MG	89	{KE_KEY, 0x20e6, KEY_PROG1},
a8823aef MG	90	{KE_KEY, 0x2142, KEY_MEDIA},
5c624841	91	{KE_KEY, 0x213b, KEY_INFO},
a8823aef	92	{KE_KEY, 0x231b, KEY_HELP},
62ec30d4 MG	93	{KE_END, 0}
	94	};
	95
	96	static struct input_dev *hp_wmi_input_dev;
	97	static struct platform_device *hp_wmi_platform_dev;
	98
	99	static struct rfkill *wifi_rfkill;
	100	static struct rfkill *bluetooth_rfkill;
	101	static struct rfkill *wwan_rfkill;
	102
47145210	103	static const struct dev_pm_ops hp_wmi_pm_ops = {
8dd2b426 FP	104	.resume = hp_wmi_resume_handler,
	105	.restore = hp_wmi_resume_handler,
	106	};
	107
62ec30d4 MG	108	static struct platform_driver hp_wmi_driver = {
62ec30d4 MG	109	.driver = {
8dd2b426 FP	110	.name = "hp-wmi",
	111	.owner = THIS_MODULE,
	112	.pm = &hp_wmi_pm_ops,
62ec30d4 MG	113	},
	114	.probe = hp_wmi_bios_setup,
	115	.remove = hp_wmi_bios_remove,
	116	};
	117
	118	static int hp_wmi_perform_query(int query, int write, int value)
	119	{
	120	struct bios_return bios_return;
	121	acpi_status status;
	122	union acpi_object *obj;
	123	struct bios_args args = {
	124	.signature = 0x55434553,
	125	.command = write ? 0x2 : 0x1,
	126	.commandtype = query,
	127	.datasize = write ? 0x4 : 0,
	128	.data = value,
	129	};
	130	struct acpi_buffer input = { sizeof(struct bios_args), &args };
	131	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
	132
	133	status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
	134
	135	obj = output.pointer;
	136
44ef00e6	137	if (!obj)
62ec30d4	138	return -EINVAL;
44ef00e6 TR	139	else if (obj->type != ACPI_TYPE_BUFFER) {
	140	kfree(obj);
	141	return -EINVAL;
	142	}
62ec30d4 MG	143
62ec30d4 MG	144	bios_return = ((struct bios_return )obj->buffer.pointer);
44ef00e6	145	kfree(obj);
62ec30d4 MG	146	if (bios_return.return_code > 0)
	147	return bios_return.return_code * -1;
	148	else
	149	return bios_return.value;
	150	}
	151
	152	static int hp_wmi_display_state(void)
	153	{
	154	return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
	155	}
	156
	157	static int hp_wmi_hddtemp_state(void)
	158	{
	159	return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
	160	}
	161
	162	static int hp_wmi_als_state(void)
	163	{
	164	return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
	165	}
	166
	167	static int hp_wmi_dock_state(void)
	168	{
871043bc	169	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
62ec30d4	170
871043bc MG	171	if (ret < 0)
	172	return ret;
	173
	174	return ret & 0x1;
62ec30d4 MG	175	}
62ec30d4 MG	176
871043bc	177	static int hp_wmi_tablet_state(void)
62ec30d4	178	{
871043bc MG	179	int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
	180
	181	if (ret < 0)
	182	return ret;
	183
	184	return (ret & 0x4) ? 1 : 0;
62ec30d4 MG	185	}
62ec30d4 MG	186
19d337df	187	static int hp_wmi_set_block(void *data, bool blocked)
62ec30d4	188	{
e5fbba85 AJ	189	enum hp_wmi_radio r = (enum hp_wmi_radio) data;
e5fbba85 AJ	190	int query = BIT(r + 8) \| ((!blocked) << r);
62ec30d4	191
19d337df	192	return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
62ec30d4 MG	193	}
62ec30d4 MG	194
19d337df JB	195	static const struct rfkill_ops hp_wmi_rfkill_ops = {
	196	.set_block = hp_wmi_set_block,
	197	};
62ec30d4	198
e5fbba85	199	static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
62ec30d4 MG	200	{
62ec30d4 MG	201	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	202	int mask = 0x200 << (r * 8);
62ec30d4	203
e5fbba85	204	if (wireless & mask)
19d337df	205	return false;
62ec30d4	206	else
19d337df	207	return true;
62ec30d4 MG	208	}
62ec30d4 MG	209
e5fbba85	210	static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
62ec30d4 MG	211	{
62ec30d4 MG	212	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
e5fbba85	213	int mask = 0x800 << (r * 8);
62ec30d4	214
e5fbba85	215	if (wireless & mask)
19d337df	216	return false;
62ec30d4	217	else
19d337df	218	return true;
62ec30d4 MG	219	}
	220
	221	static ssize_t show_display(struct device dev, struct device_attribute attr,
	222	char *buf)
	223	{
	224	int value = hp_wmi_display_state();
	225	if (value < 0)
	226	return -EINVAL;
	227	return sprintf(buf, "%d\n", value);
	228	}
	229
	230	static ssize_t show_hddtemp(struct device dev, struct device_attribute attr,
	231	char *buf)
	232	{
	233	int value = hp_wmi_hddtemp_state();
	234	if (value < 0)
	235	return -EINVAL;
	236	return sprintf(buf, "%d\n", value);
	237	}
	238
	239	static ssize_t show_als(struct device dev, struct device_attribute attr,
	240	char *buf)
	241	{
	242	int value = hp_wmi_als_state();
	243	if (value < 0)
	244	return -EINVAL;
	245	return sprintf(buf, "%d\n", value);
	246	}
	247
	248	static ssize_t show_dock(struct device dev, struct device_attribute attr,
	249	char *buf)
	250	{
	251	int value = hp_wmi_dock_state();
	252	if (value < 0)
	253	return -EINVAL;
	254	return sprintf(buf, "%d\n", value);
	255	}
	256
871043bc MG	257	static ssize_t show_tablet(struct device dev, struct device_attribute attr,
	258	char *buf)
	259	{
	260	int value = hp_wmi_tablet_state();
	261	if (value < 0)
	262	return -EINVAL;
	263	return sprintf(buf, "%d\n", value);
	264	}
	265
62ec30d4 MG	266	static ssize_t set_als(struct device dev, struct device_attribute attr,
	267	const char *buf, size_t count)
	268	{
	269	u32 tmp = simple_strtoul(buf, NULL, 10);
	270	hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
	271	return count;
	272	}
	273
	274	static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
	275	static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
	276	static DEVICE_ATTR(als, S_IRUGO \| S_IWUSR, show_als, set_als);
	277	static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
871043bc	278	static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
62ec30d4 MG	279
	280	static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
	281	{
	282	struct key_entry *key;
	283
	284	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	285	if (code == key->code)
	286	return key;
	287
	288	return NULL;
	289	}
	290
	291	static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
	292	{
	293	struct key_entry *key;
	294
	295	for (key = hp_wmi_keymap; key->type != KE_END; key++)
	296	if (key->type == KE_KEY && keycode == key->keycode)
	297	return key;
	298
	299	return NULL;
	300	}
	301
	302	static int hp_wmi_getkeycode(struct input_dev dev, int scancode, int keycode)
	303	{
	304	struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
	305
	306	if (key && key->type == KE_KEY) {
	307	*keycode = key->keycode;
	308	return 0;
	309	}
	310
	311	return -EINVAL;
	312	}
	313
	314	static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
	315	{
	316	struct key_entry *key;
	317	int old_keycode;
	318
	319	if (keycode < 0 \|\| keycode > KEY_MAX)
	320	return -EINVAL;
	321
	322	key = hp_wmi_get_entry_by_scancode(scancode);
	323	if (key && key->type == KE_KEY) {
	324	old_keycode = key->keycode;
	325	key->keycode = keycode;
	326	set_bit(keycode, dev->keybit);
	327	if (!hp_wmi_get_entry_by_keycode(old_keycode))
	328	clear_bit(old_keycode, dev->keybit);
	329	return 0;
	330	}
	331
	332	return -EINVAL;
	333	}
	334
88429a10	335	static void hp_wmi_notify(u32 value, void *context)
62ec30d4 MG	336	{
	337	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
	338	static struct key_entry *key;
	339	union acpi_object *obj;
e5fbba85	340	int eventcode;
fda11e61	341	acpi_status status;
62ec30d4	342
fda11e61 LB	343	status = wmi_get_event_data(value, &response);
	344	if (status != AE_OK) {
	345	printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status);
	346	return;
	347	}
62ec30d4 MG	348
	349	obj = (union acpi_object *)response.pointer;
	350
e5fbba85 AJ	351	if (!obj \|\| obj->type != ACPI_TYPE_BUFFER \|\| obj->buffer.length != 8) {
e5fbba85 AJ	352	printk(KERN_INFO "HP WMI: Unknown response received\n");
44ef00e6	353	kfree(obj);
e5fbba85 AJ	354	return;
	355	}
	356
	357	eventcode = ((u8 ) obj->buffer.pointer);
44ef00e6	358	kfree(obj);
e5fbba85 AJ	359	if (eventcode == 0x4)
	360	eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
	361	0);
	362	key = hp_wmi_get_entry_by_scancode(eventcode);
	363	if (key) {
	364	switch (key->type) {
	365	case KE_KEY:
	366	input_report_key(hp_wmi_input_dev,
	367	key->keycode, 1);
	368	input_sync(hp_wmi_input_dev);
	369	input_report_key(hp_wmi_input_dev,
	370	key->keycode, 0);
871043bc	371	input_sync(hp_wmi_input_dev);
e5fbba85 AJ	372	break;
	373	}
	374	} else if (eventcode == 0x1) {
	375	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	376	hp_wmi_dock_state());
	377	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	378	hp_wmi_tablet_state());
	379	input_sync(hp_wmi_input_dev);
	380	} else if (eventcode == 0x5) {
	381	if (wifi_rfkill)
	382	rfkill_set_states(wifi_rfkill,
	383	hp_wmi_get_sw_state(HPWMI_WIFI),
	384	hp_wmi_get_hw_state(HPWMI_WIFI));
	385	if (bluetooth_rfkill)
	386	rfkill_set_states(bluetooth_rfkill,
	387	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	388	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	389	if (wwan_rfkill)
	390	rfkill_set_states(wwan_rfkill,
	391	hp_wmi_get_sw_state(HPWMI_WWAN),
	392	hp_wmi_get_hw_state(HPWMI_WWAN));
62ec30d4	393	} else
e5fbba85 AJ	394	printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
e5fbba85 AJ	395	eventcode);
62ec30d4 MG	396	}
	397
	398	static int __init hp_wmi_input_setup(void)
	399	{
	400	struct key_entry *key;
	401	int err;
	402
	403	hp_wmi_input_dev = input_allocate_device();
	404
	405	hp_wmi_input_dev->name = "HP WMI hotkeys";
	406	hp_wmi_input_dev->phys = "wmi/input0";
	407	hp_wmi_input_dev->id.bustype = BUS_HOST;
	408	hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
	409	hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
	410
	411	for (key = hp_wmi_keymap; key->type != KE_END; key++) {
	412	switch (key->type) {
	413	case KE_KEY:
	414	set_bit(EV_KEY, hp_wmi_input_dev->evbit);
	415	set_bit(key->keycode, hp_wmi_input_dev->keybit);
	416	break;
62ec30d4 MG	417	}
	418	}
	419
871043bc MG	420	set_bit(EV_SW, hp_wmi_input_dev->evbit);
	421	set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
	422	set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
	423
	424	/* Set initial hardware state */
	425	input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
	426	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	427	hp_wmi_tablet_state());
	428	input_sync(hp_wmi_input_dev);
	429
62ec30d4 MG	430	err = input_register_device(hp_wmi_input_dev);
	431
	432	if (err) {
	433	input_free_device(hp_wmi_input_dev);
	434	return err;
	435	}
	436
	437	return 0;
	438	}
	439
	440	static void cleanup_sysfs(struct platform_device *device)
	441	{
	442	device_remove_file(&device->dev, &dev_attr_display);
	443	device_remove_file(&device->dev, &dev_attr_hddtemp);
	444	device_remove_file(&device->dev, &dev_attr_als);
	445	device_remove_file(&device->dev, &dev_attr_dock);
871043bc	446	device_remove_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	447	}
	448
	449	static int __init hp_wmi_bios_setup(struct platform_device *device)
	450	{
	451	int err;
3f6e2f13	452	int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
62ec30d4 MG	453
	454	err = device_create_file(&device->dev, &dev_attr_display);
	455	if (err)
	456	goto add_sysfs_error;
	457	err = device_create_file(&device->dev, &dev_attr_hddtemp);
	458	if (err)
	459	goto add_sysfs_error;
	460	err = device_create_file(&device->dev, &dev_attr_als);
	461	if (err)
	462	goto add_sysfs_error;
	463	err = device_create_file(&device->dev, &dev_attr_dock);
871043bc MG	464	if (err)
	465	goto add_sysfs_error;
	466	err = device_create_file(&device->dev, &dev_attr_tablet);
62ec30d4 MG	467	if (err)
	468	goto add_sysfs_error;
	469
3f6e2f13	470	if (wireless & 0x1) {
19d337df JB	471	wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
	472	RFKILL_TYPE_WLAN,
	473	&hp_wmi_rfkill_ops,
e5fbba85 AJ	474	(void *) HPWMI_WIFI);
	475	rfkill_init_sw_state(wifi_rfkill,
	476	hp_wmi_get_sw_state(HPWMI_WIFI));
	477	rfkill_set_hw_state(wifi_rfkill,
	478	hp_wmi_get_hw_state(HPWMI_WIFI));
fe8e4e03 LF	479	err = rfkill_register(wifi_rfkill);
fe8e4e03 LF	480	if (err)
19d337df	481	goto register_wifi_error;
3f6e2f13 MG	482	}
	483
	484	if (wireless & 0x2) {
19d337df JB	485	bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
	486	RFKILL_TYPE_BLUETOOTH,
	487	&hp_wmi_rfkill_ops,
e5fbba85 AJ	488	(void *) HPWMI_BLUETOOTH);
	489	rfkill_init_sw_state(bluetooth_rfkill,
	490	hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
	491	rfkill_set_hw_state(bluetooth_rfkill,
	492	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
fe8e4e03	493	err = rfkill_register(bluetooth_rfkill);
6989d565	494	if (err)
fe8e4e03	495	goto register_bluetooth_error;
3f6e2f13 MG	496	}
	497
	498	if (wireless & 0x4) {
19d337df JB	499	wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
	500	RFKILL_TYPE_WWAN,
	501	&hp_wmi_rfkill_ops,
e5fbba85 AJ	502	(void *) HPWMI_WWAN);
	503	rfkill_init_sw_state(wwan_rfkill,
	504	hp_wmi_get_sw_state(HPWMI_WWAN));
	505	rfkill_set_hw_state(wwan_rfkill,
	506	hp_wmi_get_hw_state(HPWMI_WWAN));
fe8e4e03 LF	507	err = rfkill_register(wwan_rfkill);
	508	if (err)
	509	goto register_wwan_err;
3f6e2f13	510	}
62ec30d4 MG	511
62ec30d4 MG	512	return 0;
fe8e4e03	513	register_wwan_err:
19d337df	514	rfkill_destroy(wwan_rfkill);
44f0606d AM	515	if (bluetooth_rfkill)
44f0606d AM	516	rfkill_unregister(bluetooth_rfkill);
fe8e4e03	517	register_bluetooth_error:
19d337df	518	rfkill_destroy(bluetooth_rfkill);
44f0606d AM	519	if (wifi_rfkill)
44f0606d AM	520	rfkill_unregister(wifi_rfkill);
19d337df JB	521	register_wifi_error:
19d337df JB	522	rfkill_destroy(wifi_rfkill);
62ec30d4 MG	523	add_sysfs_error:
	524	cleanup_sysfs(device);
	525	return err;
	526	}
	527
	528	static int __exit hp_wmi_bios_remove(struct platform_device *device)
	529	{
	530	cleanup_sysfs(device);
	531
19d337df	532	if (wifi_rfkill) {
3f6e2f13	533	rfkill_unregister(wifi_rfkill);
19d337df JB	534	rfkill_destroy(wifi_rfkill);
	535	}
	536	if (bluetooth_rfkill) {
3f6e2f13	537	rfkill_unregister(bluetooth_rfkill);
09729f0b	538	rfkill_destroy(bluetooth_rfkill);
19d337df JB	539	}
19d337df JB	540	if (wwan_rfkill) {
3f6e2f13	541	rfkill_unregister(wwan_rfkill);
19d337df JB	542	rfkill_destroy(wwan_rfkill);
19d337df JB	543	}
62ec30d4 MG	544
	545	return 0;
	546	}
	547
8dd2b426	548	static int hp_wmi_resume_handler(struct device *device)
4c395bdd	549	{
4c395bdd	550	/*
871043bc MG	551	* Hardware state may have changed while suspended, so trigger
871043bc MG	552	* input events for the current state. As this is a switch,
4c395bdd FP	553	* the input layer will only actually pass it on if the state
	554	* changed.
	555	*/
daed9537 FP	556	if (hp_wmi_input_dev) {
	557	input_report_switch(hp_wmi_input_dev, SW_DOCK,
	558	hp_wmi_dock_state());
	559	input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
	560	hp_wmi_tablet_state());
	561	input_sync(hp_wmi_input_dev);
	562	}
4c395bdd	563
e5fbba85 AJ	564	if (wifi_rfkill)
	565	rfkill_set_states(wifi_rfkill,
	566	hp_wmi_get_sw_state(HPWMI_WIFI),
	567	hp_wmi_get_hw_state(HPWMI_WIFI));
	568	if (bluetooth_rfkill)
	569	rfkill_set_states(bluetooth_rfkill,
	570	hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
	571	hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
	572	if (wwan_rfkill)
	573	rfkill_set_states(wwan_rfkill,
	574	hp_wmi_get_sw_state(HPWMI_WWAN),
	575	hp_wmi_get_hw_state(HPWMI_WWAN));
	576
4c395bdd FP	577	return 0;
	578	}
	579
62ec30d4 MG	580	static int __init hp_wmi_init(void)
	581	{
	582	int err;
	583
	584	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	585	err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
	586	hp_wmi_notify, NULL);
f2772575	587	if (ACPI_SUCCESS(err))
62ec30d4 MG	588	hp_wmi_input_setup();
	589	}
	590
	591	if (wmi_has_guid(HPWMI_BIOS_GUID)) {
	592	err = platform_driver_register(&hp_wmi_driver);
	593	if (err)
	594	return 0;
	595	hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
	596	if (!hp_wmi_platform_dev) {
	597	platform_driver_unregister(&hp_wmi_driver);
	598	return 0;
	599	}
	600	platform_device_add(hp_wmi_platform_dev);
	601	}
	602
	603	return 0;
	604	}
	605
	606	static void __exit hp_wmi_exit(void)
	607	{
	608	if (wmi_has_guid(HPWMI_EVENT_GUID)) {
	609	wmi_remove_notify_handler(HPWMI_EVENT_GUID);
	610	input_unregister_device(hp_wmi_input_dev);
	611	}
	612	if (hp_wmi_platform_dev) {
	613	platform_device_del(hp_wmi_platform_dev);
	614	platform_driver_unregister(&hp_wmi_driver);
	615	}
	616	}
	617
	618	module_init(hp_wmi_init);
	619	module_exit(hp_wmi_exit);