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#ifndef __HID_H
#define __HID_H
/*
* $Id: hid.h,v 1.1 2004-09-13 15:04:47 giacomo Exp $
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2001 Vojtech Pavlik
*/
/*
* 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
*/
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/list.h>
/*
* USB HID (Human Interface Device) interface class code
*/
#define USB_INTERFACE_CLASS_HID 3
/*
* HID class requests
*/
#define HID_REQ_GET_REPORT 0x01
#define HID_REQ_GET_IDLE 0x02
#define HID_REQ_GET_PROTOCOL 0x03
#define HID_REQ_SET_REPORT 0x09
#define HID_REQ_SET_IDLE 0x0A
#define HID_REQ_SET_PROTOCOL 0x0B
/*
* HID class descriptor types
*/
#define HID_DT_HID (USB_TYPE_CLASS | 0x01)
#define HID_DT_REPORT (USB_TYPE_CLASS | 0x02)
#define HID_DT_PHYSICAL (USB_TYPE_CLASS | 0x03)
/*
* 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_GENDESK 0x00010000
#define HID_UP_KEYBOARD 0x00070000
#define HID_UP_LED 0x00080000
#define HID_UP_BUTTON 0x00090000
#define HID_UP_ORDINAL 0x000a0000
#define HID_UP_CONSUMER 0x000c0000
#define HID_UP_DIGITIZER 0x000d0000
#define HID_UP_PID 0x000f0000
#define HID_UP_HPVENDOR 0xff7f0000
#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_HATSWITCH 0x00010039
/*
* 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
/*
* HID device quirks.
*/
#define HID_QUIRK_INVERT 0x001
#define HID_QUIRK_NOTOUCH 0x002
#define HID_QUIRK_IGNORE 0x004
#define HID_QUIRK_NOGET 0x008
#define HID_QUIRK_HIDDEV 0x010
#define HID_QUIRK_BADPAD 0x020
#define HID_QUIRK_MULTI_INPUT 0x040
#define HID_QUIRK_2WHEEL_MOUSE_HACK 0x080
#define HID_QUIRK_2WHEEL_MOUSE_HACK_ON 0x100
/*
* 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_DESCRIPTOR_SIZE 4096
#define HID_MAX_USAGES 1024
#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 */
__u16 code; /* input driver code */
__u8 type; /* input driver type */
__s8 hat_min; /* hat switch fun */
__s8 hat_max; /* ditto */
};
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[] */
};
#define HID_MAX_FIELDS 64
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 */
};
struct hid_report_enum {
unsigned numbered;
struct list_head report_list;
struct hid_report *report_id_hash[256];
};
#define HID_REPORT_TYPES 3
#define HID_BUFFER_SIZE 32
#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;
};
#define HID_CLAIMED_INPUT 1
#define HID_CLAIMED_HIDDEV 2
#define HID_CTRL_RUNNING 1
#define HID_OUT_RUNNING 2
struct hid_input {
struct list_head list;
struct hid_report *report;
struct input_dev input;
};
struct hid_device { /* device report descriptor */
__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 */
unsigned version; /* HID version */
unsigned country; /* HID country */
struct hid_report_enum report_enum[HID_REPORT_TYPES];
struct usb_device *dev; /* USB device */
int ifnum; /* USB interface number */
unsigned long iofl; /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
struct urb *urbin; /* Input URB */
char *inbuf; /* Input buffer */
dma_addr_t inbuf_dma; /* Input buffer dma */
struct urb *urbctrl; /* Control URB */
struct usb_ctrlrequest *cr; /* Control request struct */
dma_addr_t cr_dma; /* Control request struct dma */
struct hid_control_fifo ctrl[HID_CONTROL_FIFO_SIZE]; /* Control fifo */
unsigned char ctrlhead, ctrltail; /* Control fifo head & tail */
char *ctrlbuf; /* Control buffer */
dma_addr_t ctrlbuf_dma; /* Control buffer dma */
spinlock_t ctrllock; /* Control fifo spinlock */
struct urb *urbout; /* Output URB */
struct hid_report *out[HID_CONTROL_FIFO_SIZE]; /* Output pipe fifo */
unsigned char outhead, outtail; /* Output pipe fifo head & tail */
char *outbuf; /* Output buffer */
dma_addr_t outbuf_dma; /* Output buffer dma */
spinlock_t outlock; /* Output fifo spinlock */
unsigned claimed; /* Claimed by hidinput, hiddev? */
unsigned quirks; /* Various quirks the device can pull on us */
struct list_head inputs; /* The list of inputs */
void *hiddev; /* The hiddev structure */
int minor; /* Hiddev minor number */
wait_queue_head_t wait; /* For sleeping */
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 *ff_private; /* Private data for the force-feedback driver */
void (*ff_exit)(struct hid_device*); /* Called by hid_exit_ff(hid) */
int (*ff_event)(struct hid_device *hid, struct input_dev *input,
unsigned int type, unsigned int code, int value);
};
#define HID_GLOBAL_STACK_SIZE 4
#define HID_COLLECTION_STACK_SIZE 4
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;
};
struct hid_class_descriptor {
__u8 bDescriptorType;
__u16 wDescriptorLength;
} __attribute__ ((packed));
struct hid_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u16 bcdHID;
__u8 bCountryCode;
__u8 bNumDescriptors;
struct hid_class_descriptor desc[1];
} __attribute__ ((packed));
#ifdef DEBUG
#include "hid-debug.h"
#else
#define hid_dump_input(a,b) do { } while (0)
#define hid_dump_device(c) do { } while (0)
#define hid_dump_field(a,b) do { } while (0)
#define resolv_usage(a) do { } while (0)
#endif
#endif
#ifdef CONFIG_USB_HIDINPUT
/* 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))
extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32, struct pt_regs *regs);
extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
extern int hidinput_connect(struct hid_device *);
extern void hidinput_disconnect(struct hid_device *);
#else
#define IS_INPUT_APPLICATION(a) (0)
static inline void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, struct hid_usage *usage, __s32 value, struct pt_regs *regs) { }
static inline void hidinput_report_event(struct hid_device *hid, struct hid_report *report) { }
static inline int hidinput_connect(struct hid_device *hid) { return -ENODEV; }
static inline void hidinput_disconnect(struct hid_device *hid) { }
#endif
int hid_open(struct hid_device *);
void hid_close(struct hid_device *);
int hid_find_field(struct hid_device *, unsigned int, unsigned int, struct hid_field **);
int hid_set_field(struct hid_field *, unsigned, __s32);
void hid_submit_report(struct hid_device *, struct hid_report *, unsigned char dir);
void hid_init_reports(struct hid_device *hid);
int hid_find_report_by_usage(struct hid_device *hid, __u32 wanted_usage, struct hid_report **report, int type);
#ifdef CONFIG_HID_FF
int hid_ff_init(struct hid_device *hid);
#else
static inline int hid_ff_init(struct hid_device *hid) { return -1; }
#endif
static inline void hid_ff_exit(struct hid_device *hid)
{
if (hid->ff_exit)
hid->ff_exit(hid);
}
static inline int hid_ff_event(struct hid_device *hid, struct input_dev *input,
unsigned int type, unsigned int code, int value)
{
if (hid->ff_event)
return hid->ff_event(hid, input, type, code, value);
return -ENOSYS;
}