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Edit File : uhid.h \| Size : 4.54 KB
/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note / #ifndef __UHID_H_ #define __UHID_H_ / * User-space I/O driver support for HID subsystem * Copyright (c) 2012 David Herrmann / / * 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. / / * Public header for user-space communication. We try to keep every structure * aligned but to be safe we also use __attribute__((__packed__)). Therefore, * the communication should be ABI compatible even between architectures. / #include <linux/input.h> #include <linux/types.h> #include <linux/hid.h> enum uhid_event_type { __UHID_LEGACY_CREATE, UHID_DESTROY, UHID_START, UHID_STOP, UHID_OPEN, UHID_CLOSE, UHID_OUTPUT, __UHID_LEGACY_OUTPUT_EV, __UHID_LEGACY_INPUT, UHID_GET_REPORT, UHID_GET_REPORT_REPLY, UHID_CREATE2, UHID_INPUT2, UHID_SET_REPORT, UHID_SET_REPORT_REPLY, }; struct uhid_create2_req { __u8 name[128]; __u8 phys[64]; __u8 uniq[64]; __u16 rd_size; __u16 bus; __u32 vendor; __u32 product; __u32 version; __u32 country; __u8 rd_data[HID_MAX_DESCRIPTOR_SIZE]; } __attribute__((__packed__)); enum uhid_dev_flag { UHID_DEV_NUMBERED_FEATURE_REPORTS = (1ULL << 0), UHID_DEV_NUMBERED_OUTPUT_REPORTS = (1ULL << 1), UHID_DEV_NUMBERED_INPUT_REPORTS = (1ULL << 2), }; struct uhid_start_req { __u64 dev_flags; }; #define UHID_DATA_MAX 4096 enum uhid_report_type { UHID_FEATURE_REPORT, UHID_OUTPUT_REPORT, UHID_INPUT_REPORT, }; struct uhid_input2_req { __u16 size; __u8 data[UHID_DATA_MAX]; } __attribute__((__packed__)); struct uhid_output_req { __u8 data[UHID_DATA_MAX]; __u16 size; __u8 rtype; } __attribute__((__packed__)); struct uhid_get_report_req { __u32 id; __u8 rnum; __u8 rtype; } __attribute__((__packed__)); struct uhid_get_report_reply_req { __u32 id; __u16 err; __u16 size; __u8 data[UHID_DATA_MAX]; } __attribute__((__packed__)); struct uhid_set_report_req { __u32 id; __u8 rnum; __u8 rtype; __u16 size; __u8 data[UHID_DATA_MAX]; } __attribute__((__packed__)); struct uhid_set_report_reply_req { __u32 id; __u16 err; } __attribute__((__packed__)); / * Compat Layer * All these commands and requests are obsolete. You should avoid using them in * new code. We support them for backwards-compatibility, but you might not get * access to new feature in case you use them. / enum uhid_legacy_event_type { UHID_CREATE = __UHID_LEGACY_CREATE, UHID_OUTPUT_EV = __UHID_LEGACY_OUTPUT_EV, UHID_INPUT = __UHID_LEGACY_INPUT, UHID_FEATURE = UHID_GET_REPORT, UHID_FEATURE_ANSWER = UHID_GET_REPORT_REPLY, }; / Obsolete! Use UHID_CREATE2. / struct uhid_create_req { __u8 name[128]; __u8 phys[64]; __u8 uniq[64]; __u8 rd_data; __u16 rd_size; __u16 bus; __u32 vendor; __u32 product; __u32 version; __u32 country; } __attribute__((__packed__)); /* Obsolete! Use UHID_INPUT2. / struct uhid_input_req { __u8 data[UHID_DATA_MAX]; __u16 size; } __attribute__((__packed__)); / Obsolete! Kernel uses UHID_OUTPUT exclusively now. / struct uhid_output_ev_req { __u16 type; __u16 code; __s32 value; } __attribute__((__packed__)); / Obsolete! Kernel uses ABI compatible UHID_GET_REPORT. / struct uhid_feature_req { __u32 id; __u8 rnum; __u8 rtype; } __attribute__((__packed__)); / Obsolete! Use ABI compatible UHID_GET_REPORT_REPLY. / struct uhid_feature_answer_req { __u32 id; __u16 err; __u16 size; __u8 data[UHID_DATA_MAX]; } __attribute__((__packed__)); / * UHID Events * All UHID events from and to the kernel are encoded as "struct uhid_event". * The "type" field contains a UHID_* type identifier. All payload depends on * that type and can be accessed via ev->u.XYZ accordingly. * If user-space writes short events, they're extended with 0s by the kernel. If * the kernel writes short events, user-space shall extend them with 0s. / struct uhid_event { __u32 type; union { struct uhid_create_req create; struct uhid_input_req input; struct uhid_output_req output; struct uhid_output_ev_req output_ev; struct uhid_feature_req feature; struct uhid_get_report_req get_report; struct uhid_feature_answer_req feature_answer; struct uhid_get_report_reply_req get_report_reply; struct uhid_create2_req create2; struct uhid_input2_req input2; struct uhid_set_report_req set_report; struct uhid_set_report_reply_req set_report_reply; struct uhid_start_req start; } u; } __attribute__((__packed__)); #endif / __UHID_H_ */ Back

Edit File : uhid.h | Size : 4.54 KB

/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
#ifndef __UHID_H_
#define __UHID_H_

/*
 * User-space I/O driver support for HID subsystem
 * Copyright (c) 2012 David Herrmann
 */

/*
 * 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.
 */

/*
 * Public header for user-space communication. We try to keep every structure
 * aligned but to be safe we also use __attribute__((__packed__)). Therefore,
 * the communication should be ABI compatible even between architectures.
 */

#include <linux/input.h>
#include <linux/types.h>
#include <linux/hid.h>

enum uhid_event_type {
	__UHID_LEGACY_CREATE,
	UHID_DESTROY,
	UHID_START,
	UHID_STOP,
	UHID_OPEN,
	UHID_CLOSE,
	UHID_OUTPUT,
	__UHID_LEGACY_OUTPUT_EV,
	__UHID_LEGACY_INPUT,
	UHID_GET_REPORT,
	UHID_GET_REPORT_REPLY,
	UHID_CREATE2,
	UHID_INPUT2,
	UHID_SET_REPORT,
	UHID_SET_REPORT_REPLY,
};

struct uhid_create2_req {
	__u8 name[128];
	__u8 phys[64];
	__u8 uniq[64];
	__u16 rd_size;
	__u16 bus;
	__u32 vendor;
	__u32 product;
	__u32 version;
	__u32 country;
	__u8 rd_data[HID_MAX_DESCRIPTOR_SIZE];
} __attribute__((__packed__));

enum uhid_dev_flag {
	UHID_DEV_NUMBERED_FEATURE_REPORTS			= (1ULL << 0),
	UHID_DEV_NUMBERED_OUTPUT_REPORTS			= (1ULL << 1),
	UHID_DEV_NUMBERED_INPUT_REPORTS				= (1ULL << 2),
};

struct uhid_start_req {
	__u64 dev_flags;
};

#define UHID_DATA_MAX 4096

enum uhid_report_type {
	UHID_FEATURE_REPORT,
	UHID_OUTPUT_REPORT,
	UHID_INPUT_REPORT,
};

struct uhid_input2_req {
	__u16 size;
	__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));

struct uhid_output_req {
	__u8 data[UHID_DATA_MAX];
	__u16 size;
	__u8 rtype;
} __attribute__((__packed__));

struct uhid_get_report_req {
	__u32 id;
	__u8 rnum;
	__u8 rtype;
} __attribute__((__packed__));

struct uhid_get_report_reply_req {
	__u32 id;
	__u16 err;
	__u16 size;
	__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));

struct uhid_set_report_req {
	__u32 id;
	__u8 rnum;
	__u8 rtype;
	__u16 size;
	__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));

struct uhid_set_report_reply_req {
	__u32 id;
	__u16 err;
} __attribute__((__packed__));

/*
 * Compat Layer
 * All these commands and requests are obsolete. You should avoid using them in
 * new code. We support them for backwards-compatibility, but you might not get
 * access to new feature in case you use them.
 */

enum uhid_legacy_event_type {
	UHID_CREATE			= __UHID_LEGACY_CREATE,
	UHID_OUTPUT_EV			= __UHID_LEGACY_OUTPUT_EV,
	UHID_INPUT			= __UHID_LEGACY_INPUT,
	UHID_FEATURE			= UHID_GET_REPORT,
	UHID_FEATURE_ANSWER		= UHID_GET_REPORT_REPLY,
};

/* Obsolete! Use UHID_CREATE2. */
struct uhid_create_req {
	__u8 name[128];
	__u8 phys[64];
	__u8 uniq[64];
	__u8 *rd_data;
	__u16 rd_size;

__u16 bus;
	__u32 vendor;
	__u32 product;
	__u32 version;
	__u32 country;
} __attribute__((__packed__));

/* Obsolete! Use UHID_INPUT2. */
struct uhid_input_req {
	__u8 data[UHID_DATA_MAX];
	__u16 size;
} __attribute__((__packed__));

/* Obsolete! Kernel uses UHID_OUTPUT exclusively now. */
struct uhid_output_ev_req {
	__u16 type;
	__u16 code;
	__s32 value;
} __attribute__((__packed__));

/* Obsolete! Kernel uses ABI compatible UHID_GET_REPORT. */
struct uhid_feature_req {
	__u32 id;
	__u8 rnum;
	__u8 rtype;
} __attribute__((__packed__));

/* Obsolete! Use ABI compatible UHID_GET_REPORT_REPLY. */
struct uhid_feature_answer_req {
	__u32 id;
	__u16 err;
	__u16 size;
	__u8 data[UHID_DATA_MAX];
} __attribute__((__packed__));

/*
 * UHID Events
 * All UHID events from and to the kernel are encoded as "struct uhid_event".
 * The "type" field contains a UHID_* type identifier. All payload depends on
 * that type and can be accessed via ev->u.XYZ accordingly.
 * If user-space writes short events, they're extended with 0s by the kernel. If
 * the kernel writes short events, user-space shall extend them with 0s.
 */

struct uhid_event {
	__u32 type;

union {
		struct uhid_create_req create;
		struct uhid_input_req input;
		struct uhid_output_req output;
		struct uhid_output_ev_req output_ev;
		struct uhid_feature_req feature;
		struct uhid_get_report_req get_report;
		struct uhid_feature_answer_req feature_answer;
		struct uhid_get_report_reply_req get_report_reply;
		struct uhid_create2_req create2;
		struct uhid_input2_req input2;
		struct uhid_set_report_req set_report;
		struct uhid_set_report_reply_req set_report_reply;
		struct uhid_start_req start;
	} u;
} __attribute__((__packed__));

#endif /* __UHID_H_ */

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