path: root/drivers/platform/x86/hp-wmi.c

/*
 * HP WMI hotkeys
 *
 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
 *
 * 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
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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 <linux/input/sparse-keymap.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_BIOS_QUERY 0x9
#define HPWMI_HOTKEY_QUERY 0xc
#define HPWMI_WIRELESS2_QUERY 0x1b
#define HPWMI_POSTCODEERROR_QUERY 0x2a

enum hp_wmi_radio {
	HPWMI_WIFI = 0,
	HPWMI_BLUETOOTH = 1,
	HPWMI_WWAN = 2,
	HPWMI_GPS = 3,
};

enum hp_wmi_event_ids {
	HPWMI_DOCK_EVENT = 1,
	HPWMI_PARK_HDD = 2,
	HPWMI_SMART_ADAPTER = 3,
	HPWMI_BEZEL_BUTTON = 4,
	HPWMI_WIRELESS = 5,
	HPWMI_CPU_BATTERY_THROTTLE = 6,
	HPWMI_LOCK_SWITCH = 7,
	HPWMI_LID_SWITCH = 8,
	HPWMI_SCREEN_ROTATION = 9,
	HPWMI_COOLSENSE_SYSTEM_MOBILE = 0x0A,
	HPWMI_COOLSENSE_SYSTEM_HOT = 0x0B,
	HPWMI_PROXIMITY_SENSOR = 0x0C,
	HPWMI_BACKLIT_KB_BRIGHTNESS = 0x0D,
	HPWMI_PEAKSHIFT_PERIOD = 0x0F,
	HPWMI_BATTERY_CHARGE_PERIOD = 0x10,
};

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

struct bios_return {
	u32 sigpass;
	u32 return_code;
};

enum hp_return_value {
	HPWMI_RET_WRONG_SIGNATURE	= 0x02,
	HPWMI_RET_UNKNOWN_COMMAND	= 0x03,
	HPWMI_RET_UNKNOWN_CMDTYPE	= 0x04,
	HPWMI_RET_INVALID_PARAMETERS	= 0x05,
};

enum hp_wireless2_bits {
	HPWMI_POWER_STATE	= 0x01,
	HPWMI_POWER_SOFT	= 0x02,
	HPWMI_POWER_BIOS	= 0x04,
	HPWMI_POWER_HARD	= 0x08,
};

#define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
			 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
#define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)

struct bios_rfkill2_device_state {
	u8 radio_type;
	u8 bus_type;
	u16 vendor_id;
	u16 product_id;
	u16 subsys_vendor_id;
	u16 subsys_product_id;
	u8 rfkill_id;
	u8 power;
	u8 unknown[4];
};

/* 7 devices fit into the 128 byte buffer */
#define HPWMI_MAX_RFKILL2_DEVICES	7

struct bios_rfkill2_state {
	u8 unknown[7];
	u8 count;
	u8 pad[8];
	struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
};

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

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

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

struct rfkill2_device {
	u8 id;
	int num;
	struct rfkill *rfkill;
};

static int rfkill2_count;
static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];

/*
 * hp_wmi_perform_query
 *
 * query:	The commandtype -> What should be queried
 * write:	The command -> 0 read, 1 write, 3 ODM specific
 * buffer:	Buffer used as input and/or output
 * insize:	Size of input buffer
 * outsize:	Size of output buffer
 *
 * returns zero on success
 *         an HP WMI query spe