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kernel-fxtec-pro1x/include/linux/hid.h
Marc Zyngier a47b8511d9 HID: core: Sanitize event code and type when mapping input 
commit 35556bed836f8dc07ac55f69c8d17dce3e7f0e25 upstream.

When calling into hid_map_usage(), the passed event code is
blindly stored as is, even if it doesn't fit in the associated bitmap.

This event code can come from a variety of sources, including devices
masquerading as input devices, only a bit more "programmable".

Instead of taking the event code at face value, check that it actually
fits the corresponding bitmap, and if it doesn't:
- spit out a warning so that we know which device is acting up
- NULLify the bitmap pointer so that we catch unexpected uses

Code paths that can make use of untrusted inputs can now check
that the mapping was indeed correct and bail out if not.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-09-09 19:04:22 +02:00

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/*
* 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/bitops.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/mutex.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_UP_ASUSVENDOR 0xff310000
#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
/*
* Microsoft Win8 Wireless Radio Controls extensions CA, see:
* http://www.usb.org/developers/hidpage/HUTRR40RadioHIDUsagesFinal.pdf
*/
#define HID_GD_WIRELESS_RADIO_CTLS 0x0001000c
/*
* System Multi-Axis, see:
* http://www.usb.org/developers/hidpage/HUTRR62_-_Generic_Desktop_CA_for_System_Multi-Axis_Controllers.txt
*/
#define HID_GD_SYSTEM_MULTIAXIS 0x0001000e
#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
/* Microsoft Win8 Wireless Radio Controls CA usage codes */
#define HID_GD_RFKILL_BTN 0x000100c6
#define HID_GD_RFKILL_LED 0x000100c7
#define HID_GD_RFKILL_SWITCH 0x000100c8
#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_BATTERYSTRENGTH 0x000d003b
#define HID_DG_INVERT 0x000d003c
#define HID_DG_TILT_X 0x000d003d
#define HID_DG_TILT_Y 0x000d003e
#define HID_DG_TWIST 0x000d0041
#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_DEVICECONFIG 0x000d000e
#define HID_DG_DEVICESETTINGS 0x000d0023
#define HID_DG_AZIMUTH 0x000d003f
#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_SCANTIME 0x000d0056
#define HID_DG_SURFACESWITCH 0x000d0057
#define HID_DG_BUTTONSWITCH 0x000d0058
#define HID_DG_BUTTONTYPE 0x000d0059
#define HID_DG_BARRELSWITCH2 0x000d005a
#define HID_DG_TOOLSERIALNUMBER 0x000d005b
#define HID_DG_LATENCYMODE 0x000d0060
#define HID_VD_ASUS_CUSTOM_MEDIA_KEYS 0xff310076
/*
* 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 BIT(0)
#define HID_CONNECT_HIDINPUT_FORCE BIT(1)
#define HID_CONNECT_HIDRAW BIT(2)
#define HID_CONNECT_HIDDEV BIT(3)
#define HID_CONNECT_HIDDEV_FORCE BIT(4)
#define HID_CONNECT_FF BIT(5)
#define HID_CONNECT_DRIVER BIT(6)
#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 BIT(0)
#define HID_QUIRK_NOTOUCH BIT(1)
#define HID_QUIRK_IGNORE BIT(2)
#define HID_QUIRK_NOGET BIT(3)
#define HID_QUIRK_HIDDEV_FORCE BIT(4)
#define HID_QUIRK_BADPAD BIT(5)
#define HID_QUIRK_MULTI_INPUT BIT(6)
#define HID_QUIRK_HIDINPUT_FORCE BIT(7)
/* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
/* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
#define HID_QUIRK_ALWAYS_POLL BIT(10)
#define HID_QUIRK_INPUT_PER_APP BIT(11)
#define HID_QUIRK_SKIP_OUTPUT_REPORTS BIT(16)
#define HID_QUIRK_SKIP_OUTPUT_REPORT_ID BIT(17)
#define HID_QUIRK_NO_OUTPUT_REPORTS_ON_INTR_EP BIT(18)
#define HID_QUIRK_HAVE_SPECIAL_DRIVER BIT(19)
#define HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE BIT(20)
#define HID_QUIRK_FULLSPEED_INTERVAL BIT(28)
#define HID_QUIRK_NO_INIT_REPORTS BIT(29)
#define HID_QUIRK_NO_IGNORE BIT(30)
#define HID_QUIRK_NO_INPUT_SYNC BIT(31)
/*
* 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
#define HID_GROUP_STEAM 0x0103
/*
* HID protocol status
*/
#define HID_REPORT_PROTOCOL 1
#define HID_BOOT_PROTOCOL 0
/*
* 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 */
u8 usage_size[HID_MAX_USAGES]; /* usage size 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;
struct list_head hidinput_list;
unsigned int id; /* id of this report */
unsigned int type; /* report type */
unsigned int application; /* application usage for this report */
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 8192 /* 8kb */
#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 BIT(0)
#define HID_CLAIMED_HIDDEV BIT(1)
#define HID_CLAIMED_HIDRAW BIT(2)
#define HID_CLAIMED_DRIVER BIT(3)
#define HID_STAT_ADDED BIT(0)
#define HID_STAT_PARSED BIT(1)
#define HID_STAT_DUP_DETECTED BIT(2)
#define HID_STAT_REPROBED BIT(3)
struct hid_input {
struct list_head list;
struct hid_report *report;
struct input_dev *input;
const char *name;
bool registered;
struct list_head reports; /* the list of reports */
unsigned int application; /* application usage for this input */
};
enum hid_type {
HID_TYPE_OTHER = 0,
HID_TYPE_USBMOUSE,
HID_TYPE_USBNONE
};
enum hid_battery_status {
HID_BATTERY_UNKNOWN = 0,
HID_BATTERY_QUERIED, /* Kernel explicitly queried battery strength */
HID_BATTERY_REPORTED, /* Device sent unsolicited battery strength report */
};
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_input_lock; /* protects the current driver */
struct device dev; /* device */
struct hid_driver *driver;
struct hid_ll_driver *ll_driver;
struct mutex ll_open_lock;
unsigned int ll_open_count;
#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_capacity;
__s32 battery_min;
__s32 battery_max;
__s32 battery_report_type;
__s32 battery_report_id;
enum hid_battery_status battery_status;
bool battery_avoid_query;
#endif
unsigned long status; /* see STAT flags above */
unsigned claimed; /* Claimed by hidinput, hiddev? */
unsigned quirks; /* Various quirks the device can pull on us */
bool io_started; /* If IO has started */
struct list_head inputs; /* The list of inputs */
void *hiddev; /* The hiddev structure */
void *hidraw;
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);
}
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 int global_stack_ptr;
struct hid_local local;
unsigned int *collection_stack;
unsigned int collection_stack_ptr;
unsigned int collection_stack_size;
struct hid_device *device;
unsigned int 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
* @match: check if the given device is handled by this driver
* @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;
bool (*match)(struct hid_device *dev, bool ignore_special_driver);
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
* @power: request underlying hardware to enter requested power mode
* @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);
};
extern struct hid_ll_driver i2c_hid_ll_driver;
extern struct hid_ll_driver hidp_hid_driver;
extern struct hid_ll_driver uhid_hid_driver;
extern struct hid_ll_driver usb_hid_driver;
static inline bool hid_is_using_ll_driver(struct hid_device *hdev,
struct hid_ll_driver *driver)
{
return hdev->ll_driver == driver;
}
#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 struct bus_type hid_bus_type;
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 *, u32, 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 int type, unsigned int id,
unsigned int application);
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);
bool hid_match_one_id(const struct hid_device *hdev,
const struct hid_device_id *id);
const struct hid_device_id *hid_match_id(const struct hid_device *hdev,
const struct hid_device_id *id);
const struct hid_device_id *hid_match_device(struct hid_device *hdev,
struct hid_driver *hdrv);
bool hid_compare_device_paths(struct hid_device *hdev_a,
struct hid_device *hdev_b, char separator);
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\n");
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\n");
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
*
* The value pointed to by @bit will be set to NULL if either @type is
* an unhandled event type, or if @c is out of range for @type. This
* can be used as an error condition.
*/
static inline void hid_map_usage(struct hid_input *hidinput,
struct hid_usage *usage, unsigned long **bit, int *max,
__u8 type, unsigned int c)
{
struct input_dev *input = hidinput->input;
unsigned long *bmap = NULL;
unsigned int limit = 0;
switch (type) {
case EV_ABS:
bmap = input->absbit;
limit = ABS_MAX;
break;
case EV_REL:
bmap = input->relbit;
limit = REL_MAX;
break;
case EV_KEY:
bmap = input->keybit;
limit = KEY_MAX;
break;
case EV_LED:
bmap = input->ledbit;
limit = LED_MAX;
break;
}
if (unlikely(c > limit || !bmap)) {
pr_warn_ratelimited("%s: Invalid code %d type %d\n",
input->name, c, type);
*bit = NULL;
return;
}
usage->type = type;
usage->code = c;
*max = limit;
*bit = bmap;
}
/**
* 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);
if (*bit)
clear_bit(usage->code, *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);
}
int __must_check hid_hw_start(struct hid_device *hdev,
unsigned int connect_mask);
void hid_hw_stop(struct hid_device *hdev);
int __must_check hid_hw_open(struct hid_device *hdev);
void hid_hw_close(struct hid_device *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 u32 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, u32 size,
int interrupt);
/* HID quirks API */
unsigned long hid_lookup_quirk(const struct hid_device *hdev);
int hid_quirks_init(char **quirks_param, __u16 bus, int count);
void hid_quirks_exit(__u16 bus);
#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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