Release 4.7 include/linux/hid.h

/*
 *  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_LOGIVENDOR2   0xff090000

#define HID_UP_LOGIVENDOR3   0xff430000

#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;
};


#define to_hid_device(pdev) \
	container_of(pdev, struct hid_device, dev)



static inline void *hid_get_drvdata(struct hid_device *hdev)
{
	return dev_get_drvdata(&hdev->dev);
}

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static inline void hid_set_drvdata(struct hid_device *hdev, void *data)
{
	dev_set_drvdata(&hdev->dev, data);
}

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#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);
	
int (*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;
};


#define to_hid_driver(pdrv) \
	container_of(pdrv, struct hid_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);
__u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
		     unsigned offset, 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);
}

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/**
 * 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);
}

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/**
 * 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;
	}
}

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/**
 * 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);
}

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/**
 * 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);
}

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/**
 * 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;
}

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/**
 * 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);
}

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/**
 * 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);
}

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/**
 * 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);
}

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/**
 * 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;
}


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/**
 * 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);
}

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/**
 * 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);
}

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/**
 * 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;
}

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/**
 * 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;
}

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/**
 * 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);
}

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/**
 * 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);
}

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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
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adam kropelin
5
0.13%
1
0.70%
michael hanselmann
michael hanselmann
5
0.13%
1
0.70%
david howells
david howells
5
0.13%
1
0.70%
pekka sarnila
pekka sarnila
4
0.11%
1
0.70%
paul stewart
paul stewart
4
0.11%
1
0.70%
seth forshee
seth forshee
4
0.11%
1
0.70%
jamie lentin
jamie lentin
4
0.11%
1
0.70%
johan hovold
johan hovold
4
0.11%
1
0.70%
daniel mack
daniel mack
4
0.11%
1
0.70%
keng-yu lin
keng-yu lin
4
0.11%
1
0.70%
nikolai kondrashov
nikolai kondrashov
3
0.08%
1
0.70%
steven cole
steven cole
2
0.05%
1
0.70%
krzysztof kozlowski
krzysztof kozlowski
2
0.05%
1
0.70%
tomoki sekiyama
tomoki sekiyama
2
0.05%
1
0.70%
al viro
al viro
2
0.05%
1
0.70%
david brownell
david brownell
2
0.05%
1
0.70%
daniel nicoletti
daniel nicoletti
2
0.05%
1
0.70%
stelian pop
stelian pop
2
0.05%
1
0.70%
martin diehl
martin diehl
1
0.03%
1
0.70%
lucas de marchi
lucas de marchi
1
0.03%
1
0.70%
Total
3777
100.00%
143
100.00%
  
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