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#ifndef _HIDDEV_H

#define _HIDDEV_H

/*

 * $Id: hiddev.h,v 1.2 2001/04/26 11:26:09 vojtech Exp $

 *

 *  Copyright (c) 1999-2000 Vojtech Pavlik

 *

 *  Sponsored by SuSE

 */

/*

 * 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@suse.cz>, or by paper mail:

 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic

 */

/*

 * The event structure itself

 */

struct hiddev_event {

        unsigned hid;

        signed int value;

};

struct hiddev_devinfo {

        __u32 bustype;

        __u32 busnum;

        __u32 devnum;

        __u32 ifnum;

        __s16 vendor;

        __s16 product;

        __s16 version;

        __u32 num_applications;

};

struct hiddev_collection_info {

        __u32 index;

        __u32 type;

        __u32 usage;

        __u32 level;

};

#define HID_STRING_SIZE 256

struct hiddev_string_descriptor {

        __s32 index;

        char value[HID_STRING_SIZE];

};

struct hiddev_report_info {

        __u32 report_type;

        __u32 report_id;

        __u32 num_fields;

};

/* To do a GUSAGE/SUSAGE, fill in at least usage_code,  report_type and

 * report_id.  Set report_id to REPORT_ID_UNKNOWN if the rest of the fields

 * are unknown.  Otherwise use a usage_ref struct filled in from a previous

 * successful GUSAGE call to save time.  To actually send a value to the

 * device, perform a SUSAGE first, followed by a SREPORT.  An INITREPORT or a

 * GREPORT isn't necessary for a GUSAGE to return valid data.

 */

#define HID_REPORT_ID_UNKNOWN 0xffffffff

#define HID_REPORT_ID_FIRST   0x00000100

#define HID_REPORT_ID_NEXT    0x00000200

#define HID_REPORT_ID_MASK    0x000000ff

#define HID_REPORT_ID_MAX     0x000000ff

#define HID_REPORT_TYPE_INPUT   1

#define HID_REPORT_TYPE_OUTPUT  2

#define HID_REPORT_TYPE_FEATURE 3

#define HID_REPORT_TYPE_MIN     1

#define HID_REPORT_TYPE_MAX     3

struct hiddev_field_info {

        __u32 report_type;

        __u32 report_id;

        __u32 field_index;

        __u32 maxusage;

        __u32 flags;

        __u32 physical;         /* physical usage for this field */

        __u32 logical;          /* logical usage for this field */

        __u32 application;              /* application usage for this field */

        __s32 logical_minimum;

        __s32 logical_maximum;

        __s32 physical_minimum;

        __s32 physical_maximum;

        __u32 unit_exponent;

        __u32 unit;

};

/* Fill in report_type, report_id and field_index to get the information on a

 * field.

 */

#define HID_FIELD_CONSTANT              0x001

#define HID_FIELD_VARIABLE              0x002

#define HID_FIELD_RELATIVE              0x004

#define HID_FIELD_WRAP                  0x008   

#define HID_FIELD_NONLINEAR             0x010

#define HID_FIELD_NO_PREFERRED          0x020

#define HID_FIELD_NULL_STATE            0x040

#define HID_FIELD_VOLATILE              0x080

#define HID_FIELD_BUFFERED_BYTE         0x100

struct hiddev_usage_ref {

        __u32 report_type;

        __u32 report_id;

        __u32 field_index;

        __u32 usage_index;

        __u32 usage_code;

        __s32 value;

};

/* hiddev_usage_ref_multi is used for sending multiple bytes to a control.

 * It really manifests itself as setting the value of consecutive usages */

#define HID_MAX_MULTI_USAGES 1024

struct hiddev_usage_ref_multi {

        struct hiddev_usage_ref uref;

        __u32 num_values;

        __s32 values[HID_MAX_MULTI_USAGES];

};

/* FIELD_INDEX_NONE is returned in read() data from the kernel when flags

 * is set to (HIDDEV_FLAG_UREF | HIDDEV_FLAG_REPORT) and a new report has

 * been sent by the device

 */

#define HID_FIELD_INDEX_NONE 0xffffffff

/*

 * Protocol version.

 */

#define HID_VERSION             0x010004

/*

 * IOCTLs (0x00 - 0x7f)

 */

#define HIDIOCGVERSION          _IOR('H', 0x01, int)

#define HIDIOCAPPLICATION       _IO('H', 0x02)

#define HIDIOCGDEVINFO          _IOR('H', 0x03, struct hiddev_devinfo)

#define HIDIOCGSTRING           _IOR('H', 0x04, struct hiddev_string_descriptor)

#define HIDIOCINITREPORT        _IO('H', 0x05)

#define HIDIOCGNAME(len)        _IOC(_IOC_READ, 'H', 0x06, len)

#define HIDIOCGREPORT           _IOW('H', 0x07, struct hiddev_report_info)

#define HIDIOCSREPORT           _IOW('H', 0x08, struct hiddev_report_info)

#define HIDIOCGREPORTINFO       _IOWR('H', 0x09, struct hiddev_report_info)

#define HIDIOCGFIELDINFO        _IOWR('H', 0x0A, struct hiddev_field_info)

#define HIDIOCGUSAGE            _IOWR('H', 0x0B, struct hiddev_usage_ref)

#define HIDIOCSUSAGE            _IOW('H', 0x0C, struct hiddev_usage_ref)

#define HIDIOCGUCODE            _IOWR('H', 0x0D, struct hiddev_usage_ref)

#define HIDIOCGFLAG             _IOR('H', 0x0E, int)

#define HIDIOCSFLAG             _IOW('H', 0x0F, int)

#define HIDIOCGCOLLECTIONINDEX  _IOW('H', 0x10, struct hiddev_usage_ref)

#define HIDIOCGCOLLECTIONINFO   _IOWR('H', 0x11, struct hiddev_collection_info)

#define HIDIOCGPHYS(len)        _IOC(_IOC_READ, 'H', 0x12, len)

/* For writing/reading to multiple/consecutive usages */

#define HIDIOCGUSAGES           _IOWR('H', 0x13, struct hiddev_usage_ref_multi)

#define HIDIOCSUSAGES           _IOW('H', 0x14, struct hiddev_usage_ref_multi)

/*

 * Flags to be used in HIDIOCSFLAG

 */

#define HIDDEV_FLAG_UREF        0x1

#define HIDDEV_FLAG_REPORT      0x2

#define HIDDEV_FLAGS            0x3

/* To traverse the input report descriptor info for a HID device, perform the

 * following:

 *

 *  rinfo.report_type = HID_REPORT_TYPE_INPUT;

 *  rinfo.report_id = HID_REPORT_ID_FIRST;

 *  ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);

 *

 *  while (ret >= 0) {

 *      for (i = 0; i < rinfo.num_fields; i++) {

 *          finfo.report_type = rinfo.report_type;

 *          finfo.report_id = rinfo.report_id;

 *          finfo.field_index = i;

 *          ioctl(fd, HIDIOCGFIELDINFO, &finfo);

 *          for (j = 0; j < finfo.maxusage; j++) {

 *              uref.field_index = i;

 *              uref.usage_index = j;

 *              ioctl(fd, HIDIOCGUCODE, &uref);

 *              ioctl(fd, HIDIOCGUSAGE, &uref);

 *          }

 *      }

 *      rinfo.report_id |= HID_REPORT_ID_NEXT;

 *      ret = ioctl(fd, HIDIOCGREPORTINFO, &rinfo);

 *  }

 */

#ifdef __KERNEL__

/*

 * In-kernel definitions.

 */

struct hid_device;

struct hid_usage;

struct hid_field;

struct hid_report;

#ifdef CONFIG_USB_HIDDEV

int hiddev_connect(struct hid_device *);

void hiddev_disconnect(struct hid_device *);

void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,

                      struct hid_usage *usage, __s32 value);

void hiddev_report_event(struct hid_device *hid, struct hid_report *report);

int __init hiddev_init(void);

void hiddev_exit(void);

#else

static inline int hiddev_connect(struct hid_device *hid) { return -1; }

static inline void hiddev_disconnect(struct hid_device *hid) { }

static inline void hiddev_hid_event(struct hid_device *hid, struct hid_field *field,

                      struct hid_usage *usage, __s32 value) { }

static inline void hiddev_report_event(struct hid_device *hid, struct hid_report *report) { }

static inline int hiddev_init(void) { return 0; }

static inline void hiddev_exit(void) { }

#endif

#endif

#endif