Initial import

1 files changed, 1144 insertions, 0 deletions

diff --git a/include/linux/hid.h b/include/linux/hid.h
new file mode 100644
index 000000000..176b43670
--- /dev/null
+++ b/include/linux/hid.h
@@ -0,0 +1,1144 @@
+/*
+ *  Copyright (c) 1999 Andreas Gal
+ *  Copyright (c) 2000-2001 Vojtech Pavlik
+ *  Copyright (c) 2006-2007 Jiri Kosina
+ */
+/*
+ * 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
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+#ifndef __HID_H
+#define __HID_H
+
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/mod_devicetable.h> /* hid_device_id */
+#include <linux/timer.h>
+#include <linux/workqueue.h>
+#include <linux/input.h>
+#include <linux/semaphore.h>
+#include <linux/power_supply.h>
+#include <uapi/linux/hid.h>
+
+/*
+ * We parse each description item into this structure. Short items data
+ * values are expanded to 32-bit signed int, long items contain a pointer
+ * into the data area.
+ */
+
+struct hid_item {
+	unsigned  format;
+	__u8      size;
+	__u8      type;
+	__u8      tag;
+	union {
+	    __u8   u8;
+	    __s8   s8;
+	    __u16  u16;
+	    __s16  s16;
+	    __u32  u32;
+	    __s32  s32;
+	    __u8  *longdata;
+	} data;
+};
+
+/*
+ * HID report item format
+ */
+
+#define HID_ITEM_FORMAT_SHORT	0
+#define HID_ITEM_FORMAT_LONG	1
+
+/*
+ * Special tag indicating long items
+ */
+
+#define HID_ITEM_TAG_LONG	15
+
+/*
+ * HID report descriptor item type (prefix bit 2,3)
+ */
+
+#define HID_ITEM_TYPE_MAIN		0
+#define HID_ITEM_TYPE_GLOBAL		1
+#define HID_ITEM_TYPE_LOCAL		2
+#define HID_ITEM_TYPE_RESERVED		3
+
+/*
+ * HID report descriptor main item tags
+ */
+
+#define HID_MAIN_ITEM_TAG_INPUT			8
+#define HID_MAIN_ITEM_TAG_OUTPUT		9
+#define HID_MAIN_ITEM_TAG_FEATURE		11
+#define HID_MAIN_ITEM_TAG_BEGIN_COLLECTION	10
+#define HID_MAIN_ITEM_TAG_END_COLLECTION	12
+
+/*
+ * HID report descriptor main item contents
+ */
+
+#define HID_MAIN_ITEM_CONSTANT		0x001
+#define HID_MAIN_ITEM_VARIABLE		0x002
+#define HID_MAIN_ITEM_RELATIVE		0x004
+#define HID_MAIN_ITEM_WRAP		0x008
+#define HID_MAIN_ITEM_NONLINEAR		0x010
+#define HID_MAIN_ITEM_NO_PREFERRED	0x020
+#define HID_MAIN_ITEM_NULL_STATE	0x040
+#define HID_MAIN_ITEM_VOLATILE		0x080
+#define HID_MAIN_ITEM_BUFFERED_BYTE	0x100
+
+/*
+ * HID report descriptor collection item types
+ */
+
+#define HID_COLLECTION_PHYSICAL		0
+#define HID_COLLECTION_APPLICATION	1
+#define HID_COLLECTION_LOGICAL		2
+
+/*
+ * HID report descriptor global item tags
+ */
+
+#define HID_GLOBAL_ITEM_TAG_USAGE_PAGE		0
+#define HID_GLOBAL_ITEM_TAG_LOGICAL_MINIMUM	1
+#define HID_GLOBAL_ITEM_TAG_LOGICAL_MAXIMUM	2
+#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MINIMUM	3
+#define HID_GLOBAL_ITEM_TAG_PHYSICAL_MAXIMUM	4
+#define HID_GLOBAL_ITEM_TAG_UNIT_EXPONENT	5
+#define HID_GLOBAL_ITEM_TAG_UNIT		6
+#define HID_GLOBAL_ITEM_TAG_REPORT_SIZE		7
+#define HID_GLOBAL_ITEM_TAG_REPORT_ID		8
+#define HID_GLOBAL_ITEM_TAG_REPORT_COUNT	9
+#define HID_GLOBAL_ITEM_TAG_PUSH		10
+#define HID_GLOBAL_ITEM_TAG_POP			11
+
+/*
+ * HID report descriptor local item tags
+ */
+
+#define HID_LOCAL_ITEM_TAG_USAGE		0
+#define HID_LOCAL_ITEM_TAG_USAGE_MINIMUM	1
+#define HID_LOCAL_ITEM_TAG_USAGE_MAXIMUM	2
+#define HID_LOCAL_ITEM_TAG_DESIGNATOR_INDEX	3
+#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MINIMUM	4
+#define HID_LOCAL_ITEM_TAG_DESIGNATOR_MAXIMUM	5
+#define HID_LOCAL_ITEM_TAG_STRING_INDEX		7
+#define HID_LOCAL_ITEM_TAG_STRING_MINIMUM	8
+#define HID_LOCAL_ITEM_TAG_STRING_MAXIMUM	9
+#define HID_LOCAL_ITEM_TAG_DELIMITER		10
+
+/*
+ * HID usage tables
+ */
+
+#define HID_USAGE_PAGE		0xffff0000
+
+#define HID_UP_UNDEFINED	0x00000000
+#define HID_UP_GENDESK		0x00010000
+#define HID_UP_SIMULATION	0x00020000
+#define HID_UP_GENDEVCTRLS	0x00060000
+#define HID_UP_KEYBOARD		0x00070000
+#define HID_UP_LED		0x00080000
+#define HID_UP_BUTTON		0x00090000
+#define HID_UP_ORDINAL		0x000a0000
+#define HID_UP_TELEPHONY	0x000b0000
+#define HID_UP_CONSUMER		0x000c0000
+#define HID_UP_DIGITIZER	0x000d0000
+#define HID_UP_PID		0x000f0000
+#define HID_UP_HPVENDOR         0xff7f0000
+#define HID_UP_HPVENDOR2        0xff010000
+#define HID_UP_MSVENDOR		0xff000000
+#define HID_UP_CUSTOM		0x00ff0000
+#define HID_UP_LOGIVENDOR	0xffbc0000
+#define HID_UP_LNVENDOR		0xffa00000
+#define HID_UP_SENSOR		0x00200000
+
+#define HID_USAGE		0x0000ffff
+
+#define HID_GD_POINTER		0x00010001
+#define HID_GD_MOUSE		0x00010002
+#define HID_GD_JOYSTICK		0x00010004
+#define HID_GD_GAMEPAD		0x00010005
+#define HID_GD_KEYBOARD		0x00010006
+#define HID_GD_KEYPAD		0x00010007
+#define HID_GD_MULTIAXIS	0x00010008
+#define HID_GD_X		0x00010030
+#define HID_GD_Y		0x00010031
+#define HID_GD_Z		0x00010032
+#define HID_GD_RX		0x00010033
+#define HID_GD_RY		0x00010034
+#define HID_GD_RZ		0x00010035
+#define HID_GD_SLIDER		0x00010036
+#define HID_GD_DIAL		0x00010037
+#define HID_GD_WHEEL		0x00010038
+#define HID_GD_HATSWITCH	0x00010039
+#define HID_GD_BUFFER		0x0001003a
+#define HID_GD_BYTECOUNT	0x0001003b
+#define HID_GD_MOTION		0x0001003c
+#define HID_GD_START		0x0001003d
+#define HID_GD_SELECT		0x0001003e
+#define HID_GD_VX		0x00010040
+#define HID_GD_VY		0x00010041
+#define HID_GD_VZ		0x00010042
+#define HID_GD_VBRX		0x00010043
+#define HID_GD_VBRY		0x00010044
+#define HID_GD_VBRZ		0x00010045
+#define HID_GD_VNO		0x00010046
+#define HID_GD_FEATURE		0x00010047
+#define HID_GD_SYSTEM_CONTROL	0x00010080
+#define HID_GD_UP		0x00010090
+#define HID_GD_DOWN		0x00010091
+#define HID_GD_RIGHT		0x00010092
+#define HID_GD_LEFT		0x00010093
+
+#define HID_DC_BATTERYSTRENGTH	0x00060020
+
+#define HID_CP_CONSUMER_CONTROL	0x000c0001
+
+#define HID_DG_DIGITIZER	0x000d0001
+#define HID_DG_PEN		0x000d0002
+#define HID_DG_LIGHTPEN		0x000d0003
+#define HID_DG_TOUCHSCREEN	0x000d0004
+#define HID_DG_TOUCHPAD		0x000d0005
+#define HID_DG_STYLUS		0x000d0020
+#define HID_DG_PUCK		0x000d0021
+#define HID_DG_FINGER		0x000d0022
+#define HID_DG_TIPPRESSURE	0x000d0030
+#define HID_DG_BARRELPRESSURE	0x000d0031
+#define HID_DG_INRANGE		0x000d0032
+#define HID_DG_TOUCH		0x000d0033
+#define HID_DG_UNTOUCH		0x000d0034
+#define HID_DG_TAP		0x000d0035
+#define HID_DG_TABLETFUNCTIONKEY	0x000d0039
+#define HID_DG_PROGRAMCHANGEKEY	0x000d003a
+#define HID_DG_INVERT		0x000d003c
+#define HID_DG_TIPSWITCH	0x000d0042
+#define HID_DG_TIPSWITCH2	0x000d0043
+#define HID_DG_BARRELSWITCH	0x000d0044
+#define HID_DG_ERASER		0x000d0045
+#define HID_DG_TABLETPICK	0x000d0046
+
+#define HID_CP_CONSUMERCONTROL	0x000c0001
+#define HID_CP_NUMERICKEYPAD	0x000c0002
+#define HID_CP_PROGRAMMABLEBUTTONS	0x000c0003
+#define HID_CP_MICROPHONE	0x000c0004
+#define HID_CP_HEADPHONE	0x000c0005
+#define HID_CP_GRAPHICEQUALIZER	0x000c0006
+#define HID_CP_FUNCTIONBUTTONS	0x000c0036
+#define HID_CP_SELECTION	0x000c0080
+#define HID_CP_MEDIASELECTION	0x000c0087
+#define HID_CP_SELECTDISC	0x000c00ba
+#define HID_CP_PLAYBACKSPEED	0x000c00f1
+#define HID_CP_PROXIMITY	0x000c0109
+#define HID_CP_SPEAKERSYSTEM	0x000c0160
+#define HID_CP_CHANNELLEFT	0x000c0161
+#define HID_CP_CHANNELRIGHT	0x000c0162
+#define HID_CP_CHANNELCENTER	0x000c0163
+#define HID_CP_CHANNELFRONT	0x000c0164
+#define HID_CP_CHANNELCENTERFRONT	0x000c0165
+#define HID_CP_CHANNELSIDE	0x000c0166
+#define HID_CP_CHANNELSURROUND	0x000c0167
+#define HID_CP_CHANNELLOWFREQUENCYENHANCEMENT	0x000c0168
+#define HID_CP_CHANNELTOP	0x000c0169
+#define HID_CP_CHANNELUNKNOWN	0x000c016a
+#define HID_CP_APPLICATIONLAUNCHBUTTONS	0x000c0180
+#define HID_CP_GENERICGUIAPPLICATIONCONTROLS	0x000c0200
+
+#define HID_DG_CONFIDENCE	0x000d0047
+#define HID_DG_WIDTH		0x000d0048
+#define HID_DG_HEIGHT		0x000d0049
+#define HID_DG_CONTACTID	0x000d0051
+#define HID_DG_INPUTMODE	0x000d0052
+#define HID_DG_DEVICEINDEX	0x000d0053
+#define HID_DG_CONTACTCOUNT	0x000d0054
+#define HID_DG_CONTACTMAX	0x000d0055
+#define HID_DG_BUTTONTYPE	0x000d0059
+#define HID_DG_BARRELSWITCH2	0x000d005a
+#define HID_DG_TOOLSERIALNUMBER	0x000d005b
+
+/*
+ * HID report types --- Ouch! HID spec says 1 2 3!
+ */
+
+#define HID_INPUT_REPORT	0
+#define HID_OUTPUT_REPORT	1
+#define HID_FEATURE_REPORT	2
+
+#define HID_REPORT_TYPES	3
+
+/*
+ * HID connect requests
+ */
+
+#define HID_CONNECT_HIDINPUT		0x01
+#define HID_CONNECT_HIDINPUT_FORCE	0x02
+#define HID_CONNECT_HIDRAW		0x04
+#define HID_CONNECT_HIDDEV		0x08
+#define HID_CONNECT_HIDDEV_FORCE	0x10
+#define HID_CONNECT_FF			0x20
+#define HID_CONNECT_DRIVER		0x40
+#define HID_CONNECT_DEFAULT	(HID_CONNECT_HIDINPUT|HID_CONNECT_HIDRAW| \
+		HID_CONNECT_HIDDEV|HID_CONNECT_FF)
+
+/*
+ * HID device quirks.
+ */
+
+/* 
+ * Increase this if you need to configure more HID quirks at module load time
+ */
+#define MAX_USBHID_BOOT_QUIRKS 4
+
+#define HID_QUIRK_INVERT			0x00000001
+#define HID_QUIRK_NOTOUCH			0x00000002
+#define HID_QUIRK_IGNORE			0x00000004
+#define HID_QUIRK_NOGET				0x00000008
+#define HID_QUIRK_HIDDEV_FORCE			0x00000010
+#define HID_QUIRK_BADPAD			0x00000020
+#define HID_QUIRK_MULTI_INPUT			0x00000040
+#define HID_QUIRK_HIDINPUT_FORCE		0x00000080
+#define HID_QUIRK_NO_EMPTY_INPUT		0x00000100
+#define HID_QUIRK_NO_INIT_INPUT_REPORTS		0x00000200
+#define HID_QUIRK_ALWAYS_POLL			0x00000400
+#define HID_QUIRK_SKIP_OUTPUT_REPORTS		0x00010000
+#define HID_QUIRK_SKIP_OUTPUT_REPORT_ID		0x00020000
+#define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP	0x00040000
+#define HID_QUIRK_FULLSPEED_INTERVAL		0x10000000
+#define HID_QUIRK_NO_INIT_REPORTS		0x20000000
+#define HID_QUIRK_NO_IGNORE			0x40000000
+#define HID_QUIRK_NO_INPUT_SYNC			0x80000000
+
+/*
+ * HID device groups
+ *
+ * Note: HID_GROUP_ANY is declared in linux/mod_devicetable.h
+ * and has a value of 0x0000
+ */
+#define HID_GROUP_GENERIC			0x0001
+#define HID_GROUP_MULTITOUCH			0x0002
+#define HID_GROUP_SENSOR_HUB			0x0003
+#define HID_GROUP_MULTITOUCH_WIN_8		0x0004
+
+/*
+ * Vendor specific HID device groups
+ */
+#define HID_GROUP_RMI				0x0100
+#define HID_GROUP_WACOM				0x0101
+#define HID_GROUP_LOGITECH_DJ_DEVICE		0x0102
+
+/*
+ * This is the global environment of the parser. This information is
+ * persistent for main-items. The global environment can be saved and
+ * restored with PUSH/POP statements.
+ */
+
+struct hid_global {
+	unsigned usage_page;
+	__s32    logical_minimum;
+	__s32    logical_maximum;
+	__s32    physical_minimum;
+	__s32    physical_maximum;
+	__s32    unit_exponent;
+	unsigned unit;
+	unsigned report_id;
+	unsigned report_size;
+	unsigned report_count;
+};
+
+/*
+ * This is the local environment. It is persistent up the next main-item.
+ */
+
+#define HID_MAX_USAGES			12288
+#define HID_DEFAULT_NUM_COLLECTIONS	16
+
+struct hid_local {
+	unsigned usage[HID_MAX_USAGES]; /* usage array */
+	unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
+	unsigned usage_index;
+	unsigned usage_minimum;
+	unsigned delimiter_depth;
+	unsigned delimiter_branch;
+};
+
+/*
+ * This is the collection stack. We climb up the stack to determine
+ * application and function of each field.
+ */
+
+struct hid_collection {
+	unsigned type;
+	unsigned usage;
+	unsigned level;
+};
+
+struct hid_usage {
+	unsigned  hid;			/* hid usage code */
+	unsigned  collection_index;	/* index into collection array */
+	unsigned  usage_index;		/* index into usage array */
+	/* hidinput data */
+	__u16     code;			/* input driver code */
+	__u8      type;			/* input driver type */
+	__s8	  hat_min;		/* hat switch fun */
+	__s8	  hat_max;		/* ditto */
+	__s8	  hat_dir;		/* ditto */
+};
+
+struct hid_input;
+
+struct hid_field {
+	unsigned  physical;		/* physical usage for this field */
+	unsigned  logical;		/* logical usage for this field */
+	unsigned  application;		/* application usage for this field */
+	struct hid_usage *usage;	/* usage table for this function */
+	unsigned  maxusage;		/* maximum usage index */
+	unsigned  flags;		/* main-item flags (i.e. volatile,array,constant) */
+	unsigned  report_offset;	/* bit offset in the report */
+	unsigned  report_size;		/* size of this field in the report */
+	unsigned  report_count;		/* number of this field in the report */
+	unsigned  report_type;		/* (input,output,feature) */
+	__s32    *value;		/* last known value(s) */
+	__s32     logical_minimum;
+	__s32     logical_maximum;
+	__s32     physical_minimum;
+	__s32     physical_maximum;
+	__s32     unit_exponent;
+	unsigned  unit;
+	struct hid_report *report;	/* associated report */
+	unsigned index;			/* index into report->field[] */
+	/* hidinput data */
+	struct hid_input *hidinput;	/* associated input structure */
+	__u16 dpad;			/* dpad input code */
+};
+
+#define HID_MAX_FIELDS 256
+
+struct hid_report {
+	struct list_head list;
+	unsigned id;					/* id of this report */
+	unsigned type;					/* report type */
+	struct hid_field *field[HID_MAX_FIELDS];	/* fields of the report */
+	unsigned maxfield;				/* maximum valid field index */
+	unsigned size;					/* size of the report (bits) */
+	struct hid_device *device;			/* associated device */
+};
+
+#define HID_MAX_IDS 256
+
+struct hid_report_enum {
+	unsigned numbered;
+	struct list_head report_list;
+	struct hid_report *report_id_hash[HID_MAX_IDS];
+};
+
+#define HID_MIN_BUFFER_SIZE	64		/* make sure there is at least a packet size of space */
+#define HID_MAX_BUFFER_SIZE	4096		/* 4kb */
+#define HID_CONTROL_FIFO_SIZE	256		/* to init devices with >100 reports */
+#define HID_OUTPUT_FIFO_SIZE	64
+
+struct hid_control_fifo {
+	unsigned char dir;
+	struct hid_report *report;
+	char *raw_report;
+};
+
+struct hid_output_fifo {
+	struct hid_report *report;
+	char *raw_report;
+};
+
+#define HID_CLAIMED_INPUT	1
+#define HID_CLAIMED_HIDDEV	2
+#define HID_CLAIMED_HIDRAW	4
+#define HID_CLAIMED_DRIVER	8
+
+#define HID_STAT_ADDED		1
+#define HID_STAT_PARSED		2
+
+struct hid_input {
+	struct list_head list;
+	struct hid_report *report;
+	struct input_dev *input;
+};
+
+enum hid_type {
+	HID_TYPE_OTHER = 0,
+	HID_TYPE_USBMOUSE,
+	HID_TYPE_USBNONE
+};
+
+struct hid_driver;
+struct hid_ll_driver;
+
+struct hid_device {							/* device report descriptor */
+	__u8 *dev_rdesc;
+	unsigned dev_rsize;
+	__u8 *rdesc;
+	unsigned rsize;
+	struct hid_collection *collection;				/* List of HID collections */
+	unsigned collection_size;					/* Number of allocated hid_collections */
+	unsigned maxcollection;						/* Number of parsed collections */
+	unsigned maxapplication;					/* Number of applications */
+	__u16 bus;							/* BUS ID */
+	__u16 group;							/* Report group */
+	__u32 vendor;							/* Vendor ID */
+	__u32 product;							/* Product ID */
+	__u32 version;							/* HID version */
+	enum hid_type type;						/* device type (mouse, kbd, ...) */
+	unsigned country;						/* HID country */
+	struct hid_report_enum report_enum[HID_REPORT_TYPES];
+	struct work_struct led_work;					/* delayed LED worker */
+
+	struct semaphore driver_lock;					/* protects the current driver, except during input */
+	struct semaphore driver_input_lock;				/* protects the current driver */
+	struct device dev;						/* device */
+	struct hid_driver *driver;
+	struct hid_ll_driver *ll_driver;
+
+#ifdef CONFIG_HID_BATTERY_STRENGTH
+	/*
+	 * Power supply information for HID devices which report
+	 * battery strength. power_supply was successfully registered if
+	 * battery is non-NULL.
+	 */
+	struct power_supply *battery;
+	__s32 battery_min;
+	__s32 battery_max;
+	__s32 battery_report_type;
+	__s32 battery_report_id;
+#endif
+
+	unsigned int status;						/* see STAT flags above */
+	unsigned claimed;						/* Claimed by hidinput, hiddev? */
+	unsigned quirks;						/* Various quirks the device can pull on us */
+	bool io_started;						/* Protected by driver_lock. If IO has started */
+
+	struct list_head inputs;					/* The list of inputs */
+	void *hiddev;							/* The hiddev structure */
+	void *hidraw;
+	int minor;							/* Hiddev minor number */
+
+	int open;							/* is the device open by anyone? */
+	char name[128];							/* Device name */
+	char phys[64];							/* Device physical location */
+	char uniq[64];							/* Device unique identifier (serial #) */
+
+	void *driver_data;
+
+	/* temporary hid_ff handling (until moved to the drivers) */
+	int (*ff_init)(struct hid_device *);
+
+	/* hiddev event handler */
+	int (*hiddev_connect)(struct hid_device *, unsigned int);
+	void (*hiddev_disconnect)(struct hid_device *);
+	void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
+				  struct hid_usage *, __s32);
+	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
+
+	/* debugging support via debugfs */
+	unsigned short debug;
+	struct dentry *debug_dir;
+	struct dentry *debug_rdesc;
+	struct dentry *debug_events;
+	struct list_head debug_list;
+	spinlock_t  debug_list_lock;
+	wait_queue_head_t debug_wait;
+};
+
+static inline void *hid_get_drvdata(struct hid_device *hdev)
+{
+	return dev_get_drvdata(&hdev->dev);
+}
+
+static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
+{
+	dev_set_drvdata(&hdev->dev, data);
+}
+
+#define HID_GLOBAL_STACK_SIZE 4
+#define HID_COLLECTION_STACK_SIZE 4
+
+#define HID_SCAN_FLAG_MT_WIN_8			BIT(0)
+#define HID_SCAN_FLAG_VENDOR_SPECIFIC		BIT(1)
+#define HID_SCAN_FLAG_GD_POINTER		BIT(2)
+
+struct hid_parser {
+	struct hid_global     global;
+	struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
+	unsigned              global_stack_ptr;
+	struct hid_local      local;
+	unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
+	unsigned              collection_stack_ptr;
+	struct hid_device    *device;
+	unsigned              scan_flags;
+};
+
+struct hid_class_descriptor {
+	__u8  bDescriptorType;
+	__le16 wDescriptorLength;
+} __attribute__ ((packed));
+
+struct hid_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+	__le16 bcdHID;
+	__u8  bCountryCode;
+	__u8  bNumDescriptors;
+
+	struct hid_class_descriptor desc[1];
+} __attribute__ ((packed));
+
+#define HID_DEVICE(b, g, ven, prod)					\
+	.bus = (b), .group = (g), .vendor = (ven), .product = (prod)
+#define HID_USB_DEVICE(ven, prod)				\
+	.bus = BUS_USB, .vendor = (ven), .product = (prod)
+#define HID_BLUETOOTH_DEVICE(ven, prod)					\
+	.bus = BUS_BLUETOOTH, .vendor = (ven), .product = (prod)
+#define HID_I2C_DEVICE(ven, prod)				\
+	.bus = BUS_I2C, .vendor = (ven), .product = (prod)
+
+#define HID_REPORT_ID(rep) \
+	.report_type = (rep)
+#define HID_USAGE_ID(uhid, utype, ucode) \
+	.usage_hid = (uhid), .usage_type = (utype), .usage_code = (ucode)
+/* we don't want to catch types and codes equal to 0 */
+#define HID_TERMINATOR		(HID_ANY_ID - 1)
+
+struct hid_report_id {
+	__u32 report_type;
+};
+struct hid_usage_id {
+	__u32 usage_hid;
+	__u32 usage_type;
+	__u32 usage_code;
+};
+
+/**
+ * struct hid_driver
+ * @name: driver name (e.g. "Footech_bar-wheel")
+ * @id_table: which devices is this driver for (must be non-NULL for probe
+ * 	      to be called)
+ * @dyn_list: list of dynamically added device ids
+ * @dyn_lock: lock protecting @dyn_list
+ * @probe: new device inserted
+ * @remove: device removed (NULL if not a hot-plug capable driver)
+ * @report_table: on which reports to call raw_event (NULL means all)
+ * @raw_event: if report in report_table, this hook is called (NULL means nop)
+ * @usage_table: on which events to call event (NULL means all)
+ * @event: if usage in usage_table, this hook is called (NULL means nop)
+ * @report: this hook is called after parsing a report (NULL means nop)
+ * @report_fixup: called before report descriptor parsing (NULL means nop)
+ * @input_mapping: invoked on input registering before mapping an usage
+ * @input_mapped: invoked on input registering after mapping an usage
+ * @input_configured: invoked just before the device is registered
+ * @feature_mapping: invoked on feature registering
+ * @suspend: invoked on suspend (NULL means nop)
+ * @resume: invoked on resume if device was not reset (NULL means nop)
+ * @reset_resume: invoked on resume if device was reset (NULL means nop)
+ *
+ * probe should return -errno on error, or 0 on success. During probe,
+ * input will not be passed to raw_event unless hid_device_io_start is
+ * called.
+ *
+ * raw_event and event should return 0 on no action performed, 1 when no
+ * further processing should be done and negative on error
+ *
+ * input_mapping shall return a negative value to completely ignore this usage
+ * (e.g. doubled or invalid usage), zero to continue with parsing of this
+ * usage by generic code (no special handling needed) or positive to skip
+ * generic parsing (needed special handling which was done in the hook already)
+ * input_mapped shall return negative to inform the layer that this usage
+ * should not be considered for further processing or zero to notify that
+ * no processing was performed and should be done in a generic manner
+ * Both these functions may be NULL which means the same behavior as returning
+ * zero from them.
+ */
+struct hid_driver {
+	char *name;
+	const struct hid_device_id *id_table;
+
+	struct list_head dyn_list;
+	spinlock_t dyn_lock;
+
+	int (*probe)(struct hid_device *dev, const struct hid_device_id *id);
+	void (*remove)(struct hid_device *dev);
+
+	const struct hid_report_id *report_table;
+	int (*raw_event)(struct hid_device *hdev, struct hid_report *report,
+			u8 *data, int size);
+	const struct hid_usage_id *usage_table;
+	int (*event)(struct hid_device *hdev, struct hid_field *field,
+			struct hid_usage *usage, __s32 value);
+	void (*report)(struct hid_device *hdev, struct hid_report *report);
+
+	__u8 *(*report_fixup)(struct hid_device *hdev, __u8 *buf,
+			unsigned int *size);
+
+	int (*input_mapping)(struct hid_device *hdev,
+			struct hid_input *hidinput, struct hid_field *field,
+			struct hid_usage *usage, unsigned long **bit, int *max);
+	int (*input_mapped)(struct hid_device *hdev,
+			struct hid_input *hidinput, struct hid_field *field,
+			struct hid_usage *usage, unsigned long **bit, int *max);
+	void (*input_configured)(struct hid_device *hdev,
+				 struct hid_input *hidinput);
+	void (*feature_mapping)(struct hid_device *hdev,
+			struct hid_field *field,
+			struct hid_usage *usage);
+#ifdef CONFIG_PM
+	int (*suspend)(struct hid_device *hdev, pm_message_t message);
+	int (*resume)(struct hid_device *hdev);
+	int (*reset_resume)(struct hid_device *hdev);
+#endif
+/* private: */
+	struct device_driver driver;
+};
+
+/**
+ * hid_ll_driver - low level driver callbacks
+ * @start: called on probe to start the device
+ * @stop: called on remove
+ * @open: called by input layer on open
+ * @close: called by input layer on close
+ * @parse: this method is called only once to parse the device data,
+ *	   shouldn't allocate anything to not leak memory
+ * @request: send report request to device (e.g. feature report)
+ * @wait: wait for buffered io to complete (send/recv reports)
+ * @raw_request: send raw report request to device (e.g. feature report)
+ * @output_report: send output report to device
+ * @idle: send idle request to device
+ */
+struct hid_ll_driver {
+	int (*start)(struct hid_device *hdev);
+	void (*stop)(struct hid_device *hdev);
+
+	int (*open)(struct hid_device *hdev);
+	void (*close)(struct hid_device *hdev);
+
+	int (*power)(struct hid_device *hdev, int level);
+
+	int (*parse)(struct hid_device *hdev);
+
+	void (*request)(struct hid_device *hdev,
+			struct hid_report *report, int reqtype);
+
+	int (*wait)(struct hid_device *hdev);
+
+	int (*raw_request) (struct hid_device *hdev, unsigned char reportnum,
+			    __u8 *buf, size_t len, unsigned char rtype,
+			    int reqtype);
+
+	int (*output_report) (struct hid_device *hdev, __u8 *buf, size_t len);
+
+	int (*idle)(struct hid_device *hdev, int report, int idle, int reqtype);
+};
+
+#define	PM_HINT_FULLON	1<<5
+#define PM_HINT_NORMAL	1<<1
+
+/* Applications from HID Usage Tables 4/8/99 Version 1.1 */
+/* We ignore a few input applications that are not widely used */
+#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001) || ((a >= 0x000d0002) && (a <= 0x000d0006)))
+
+/* HID core API */
+
+extern int hid_debug;
+
+extern bool hid_ignore(struct hid_device *);
+extern int hid_add_device(struct hid_device *);
+extern void hid_destroy_device(struct hid_device *);
+
+extern int __must_check __hid_register_driver(struct hid_driver *,
+		struct module *, const char *mod_name);
+
+/* use a define to avoid include chaining to get THIS_MODULE & friends */
+#define hid_register_driver(driver) \
+	__hid_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
+
+extern void hid_unregister_driver(struct hid_driver *);
+
+/**
+ * module_hid_driver() - Helper macro for registering a HID driver
+ * @__hid_driver: hid_driver struct
+ *
+ * Helper macro for HID drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_hid_driver(__hid_driver) \
+	module_driver(__hid_driver, hid_register_driver, \
+		      hid_unregister_driver)
+
+extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
+extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
+extern int hidinput_connect(struct hid_device *hid, unsigned int force);
+extern void hidinput_disconnect(struct hid_device *);
+
+int hid_set_field(struct hid_field *, unsigned, __s32);
+int hid_input_report(struct hid_device *, int type, u8 *, int, int);
+int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
+struct hid_field *hidinput_get_led_field(struct hid_device *hid);
+unsigned int hidinput_count_leds(struct hid_device *hid);
+__s32 hidinput_calc_abs_res(const struct hid_field *field, __u16 code);
+void hid_output_report(struct hid_report *report, __u8 *data);
+void __hid_request(struct hid_device *hid, struct hid_report *rep, int reqtype);
+u8 *hid_alloc_report_buf(struct hid_report *report, gfp_t flags);
+struct hid_device *hid_allocate_device(void);
+struct hid_report *hid_register_report(struct hid_device *device, unsigned type, unsigned id);
+int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
+struct hid_report *hid_validate_values(struct hid_device *hid,
+				       unsigned int type, unsigned int id,
+				       unsigned int field_index,
+				       unsigned int report_counts);
+int hid_open_report(struct hid_device *device);
+int hid_check_keys_pressed(struct hid_device *hid);
+int hid_connect(struct hid_device *hid, unsigned int connect_mask);
+void hid_disconnect(struct hid_device *hid);
+const struct hid_device_id *hid_match_id(struct hid_device *hdev,
+					 const struct hid_device_id *id);
+s32 hid_snto32(__u32 value, unsigned n);
+
+/**
+ * hid_device_io_start - enable HID input during probe, remove
+ *
+ * @hid - the device
+ *
+ * This should only be called during probe or remove and only be
+ * called by the thread calling probe or remove. It will allow
+ * incoming packets to be delivered to the driver.
+ */
+static inline void hid_device_io_start(struct hid_device *hid) {
+	if (hid->io_started) {
+		dev_warn(&hid->dev, "io already started");
+		return;
+	}
+	hid->io_started = true;
+	up(&hid->driver_input_lock);
+}
+
+/**
+ * hid_device_io_stop - disable HID input during probe, remove
+ *
+ * @hid - the device
+ *
+ * Should only be called after hid_device_io_start. It will prevent
+ * incoming packets from going to the driver for the duration of
+ * probe, remove. If called during probe, packets will still go to the
+ * driver after probe is complete. This function should only be called
+ * by the thread calling probe or remove.
+ */
+static inline void hid_device_io_stop(struct hid_device *hid) {
+	if (!hid->io_started) {
+		dev_warn(&hid->dev, "io already stopped");
+		return;
+	}
+	hid->io_started = false;
+	down(&hid->driver_input_lock);
+}
+
+/**
+ * hid_map_usage - map usage input bits
+ *
+ * @hidinput: hidinput which we are interested in
+ * @usage: usage to fill in
+ * @bit: pointer to input->{}bit (out parameter)
+ * @max: maximal valid usage->code to consider later (out parameter)
+ * @type: input event type (EV_KEY, EV_REL, ...)
+ * @c: code which corresponds to this usage and type
+ */
+static inline void hid_map_usage(struct hid_input *hidinput,
+		struct hid_usage *usage, unsigned long **bit, int *max,
+		__u8 type, __u16 c)
+{
+	struct input_dev *input = hidinput->input;
+
+	usage->type = type;
+	usage->code = c;
+
+	switch (type) {
+	case EV_ABS:
+		*bit = input->absbit;
+		*max = ABS_MAX;
+		break;
+	case EV_REL:
+		*bit = input->relbit;
+		*max = REL_MAX;
+		break;
+	case EV_KEY:
+		*bit = input->keybit;
+		*max = KEY_MAX;
+		break;
+	case EV_LED:
+		*bit = input->ledbit;
+		*max = LED_MAX;
+		break;
+	}
+}
+
+/**
+ * hid_map_usage_clear - map usage input bits and clear the input bit
+ *
+ * The same as hid_map_usage, except the @c bit is also cleared in supported
+ * bits (@bit).
+ */
+static inline void hid_map_usage_clear(struct hid_input *hidinput,
+		struct hid_usage *usage, unsigned long **bit, int *max,
+		__u8 type, __u16 c)
+{
+	hid_map_usage(hidinput, usage, bit, max, type, c);
+	clear_bit(c, *bit);
+}
+
+/**
+ * hid_parse - parse HW reports
+ *
+ * @hdev: hid device
+ *
+ * Call this from probe after you set up the device (if needed). Your
+ * report_fixup will be called (if non-NULL) after reading raw report from
+ * device before passing it to hid layer for real parsing.
+ */
+static inline int __must_check hid_parse(struct hid_device *hdev)
+{
+	return hid_open_report(hdev);
+}
+
+/**
+ * hid_hw_start - start underlaying HW
+ *
+ * @hdev: hid device
+ * @connect_mask: which outputs to connect, see HID_CONNECT_*
+ *
+ * Call this in probe function *after* hid_parse. This will setup HW buffers
+ * and start the device (if not deffered to device open). hid_hw_stop must be
+ * called if this was successful.
+ */
+static inline int __must_check hid_hw_start(struct hid_device *hdev,
+		unsigned int connect_mask)
+{
+	int ret = hdev->ll_driver->start(hdev);
+	if (ret || !connect_mask)
+		return ret;
+	ret = hid_connect(hdev, connect_mask);
+	if (ret)
+		hdev->ll_driver->stop(hdev);
+	return ret;
+}
+
+/**
+ * hid_hw_stop - stop underlaying HW
+ *
+ * @hdev: hid device
+ *
+ * This is usually called from remove function or from probe when something
+ * failed and hid_hw_start was called already.
+ */
+static inline void hid_hw_stop(struct hid_device *hdev)
+{
+	hid_disconnect(hdev);
+	hdev->ll_driver->stop(hdev);
+}
+
+/**
+ * hid_hw_open - signal underlaying HW to start delivering events
+ *
+ * @hdev: hid device
+ *
+ * Tell underlying HW to start delivering events from the device.
+ * This function should be called sometime after successful call
+ * to hid_hiw_start().
+ */
+static inline int __must_check hid_hw_open(struct hid_device *hdev)
+{
+	return hdev->ll_driver->open(hdev);
+}
+
+/**
+ * hid_hw_close - signal underlaying HW to stop delivering events
+ *
+ * @hdev: hid device
+ *
+ * This function indicates that we are not interested in the events
+ * from this device anymore. Delivery of events may or may not stop,
+ * depending on the number of users still outstanding.
+ */
+static inline void hid_hw_close(struct hid_device *hdev)
+{
+	hdev->ll_driver->close(hdev);
+}
+
+/**
+ * hid_hw_power - requests underlying HW to go into given power mode
+ *
+ * @hdev: hid device
+ * @level: requested power level (one of %PM_HINT_* defines)
+ *
+ * This function requests underlying hardware to enter requested power
+ * mode.
+ */
+
+static inline int hid_hw_power(struct hid_device *hdev, int level)
+{
+	return hdev->ll_driver->power ? hdev->ll_driver->power(hdev, level) : 0;
+}
+
+
+/**
+ * hid_hw_request - send report request to device
+ *
+ * @hdev: hid device
+ * @report: report to send
+ * @reqtype: hid request type
+ */
+static inline void hid_hw_request(struct hid_device *hdev,
+				  struct hid_report *report, int reqtype)
+{
+	if (hdev->ll_driver->request)
+		return hdev->ll_driver->request(hdev, report, reqtype);
+
+	__hid_request(hdev, report, reqtype);
+}
+
+/**
+ * hid_hw_raw_request - send report request to device
+ *
+ * @hdev: hid device
+ * @reportnum: report ID
+ * @buf: in/out data to transfer
+ * @len: length of buf
+ * @rtype: HID report type
+ * @reqtype: HID_REQ_GET_REPORT or HID_REQ_SET_REPORT
+ *
+ * @return: count of data transfered, negative if error
+ *
+ * Same behavior as hid_hw_request, but with raw buffers instead.
+ */
+static inline int hid_hw_raw_request(struct hid_device *hdev,
+				  unsigned char reportnum, __u8 *buf,
+				  size_t len, unsigned char rtype, int reqtype)
+{
+	if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
+		return -EINVAL;
+
+	return hdev->ll_driver->raw_request(hdev, reportnum, buf, len,
+						    rtype, reqtype);
+}
+
+/**
+ * hid_hw_output_report - send output report to device
+ *
+ * @hdev: hid device
+ * @buf: raw data to transfer
+ * @len: length of buf
+ *
+ * @return: count of data transfered, negative if error
+ */
+static inline int hid_hw_output_report(struct hid_device *hdev, __u8 *buf,
+					size_t len)
+{
+	if (len < 1 || len > HID_MAX_BUFFER_SIZE || !buf)
+		return -EINVAL;
+
+	if (hdev->ll_driver->output_report)
+		return hdev->ll_driver->output_report(hdev, buf, len);
+
+	return -ENOSYS;
+}
+
+/**
+ * hid_hw_idle - send idle request to device
+ *
+ * @hdev: hid device
+ * @report: report to control
+ * @idle: idle state
+ * @reqtype: hid request type
+ */
+static inline int hid_hw_idle(struct hid_device *hdev, int report, int idle,
+		int reqtype)
+{
+	if (hdev->ll_driver->idle)
+		return hdev->ll_driver->idle(hdev, report, idle, reqtype);
+
+	return 0;
+}
+
+/**
+ * hid_hw_wait - wait for buffered io to complete
+ *
+ * @hdev: hid device
+ */
+static inline void hid_hw_wait(struct hid_device *hdev)
+{
+	if (hdev->ll_driver->wait)
+		hdev->ll_driver->wait(hdev);
+}
+
+/**
+ * hid_report_len - calculate the report length
+ *
+ * @report: the report we want to know the length
+ */
+static inline int hid_report_len(struct hid_report *report)
+{
+	/* equivalent to DIV_ROUND_UP(report->size, 8) + !!(report->id > 0) */
+	return ((report->size - 1) >> 3) + 1 + (report->id > 0);
+}
+
+int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
+		int interrupt);
+
+/* HID quirks API */
+u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
+int usbhid_quirks_init(char **quirks_param);
+void usbhid_quirks_exit(void);
+
+#ifdef CONFIG_HID_PID
+int hid_pidff_init(struct hid_device *hid);
+#else
+#define hid_pidff_init NULL
+#endif
+
+#define dbg_hid(format, arg...)						\
+do {									\
+	if (hid_debug)							\
+		printk(KERN_DEBUG "%s: " format, __FILE__, ##arg);	\
+} while (0)
+
+#define hid_printk(level, hid, fmt, arg...)		\
+	dev_printk(level, &(hid)->dev, fmt, ##arg)
+#define hid_emerg(hid, fmt, arg...)			\
+	dev_emerg(&(hid)->dev, fmt, ##arg)
+#define hid_crit(hid, fmt, arg...)			\
+	dev_crit(&(hid)->dev, fmt, ##arg)
+#define hid_alert(hid, fmt, arg...)			\
+	dev_alert(&(hid)->dev, fmt, ##arg)
+#define hid_err(hid, fmt, arg...)			\
+	dev_err(&(hid)->dev, fmt, ##arg)
+#define hid_notice(hid, fmt, arg...)			\
+	dev_notice(&(hid)->dev, fmt, ##arg)
+#define hid_warn(hid, fmt, arg...)			\
+	dev_warn(&(hid)->dev, fmt, ##arg)
+#define hid_info(hid, fmt, arg...)			\
+	dev_info(&(hid)->dev, fmt, ##arg)
+#define hid_dbg(hid, fmt, arg...)			\
+	dev_dbg(&(hid)->dev, fmt, ##arg)
+
+#endif