9477390796
This driver provides raw access to HID devices through uhid(4)-compatible interface and is based on pre-8.x uhid(4) code. Unlike uhid(4) it does not take devices in to monopoly ownership and allows parallel access from other drivers. hidraw supports Linux's hidraw-compatible interface as well. Reviewed by: hselasky Differential revision: https://reviews.freebsd.org/D27992
98 lines
3.4 KiB
C
98 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2020 Vladimir Kondratyev <wulf@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _HID_HIDRAW_H
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#define _HID_HIDRAW_H
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#include <sys/ioccom.h>
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#define HIDRAW_BUFFER_SIZE 64 /* number of input reports buffered */
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#define HID_MAX_DESCRIPTOR_SIZE 4096 /* artificial limit taken from Linux */
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/*
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* Align IOCTL structures to hide differences when running 32-bit
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* programs under 64-bit kernels:
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*/
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#ifdef COMPAT_32BIT
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#define HIDRAW_IOCTL_STRUCT_ALIGN(n) __aligned(n)
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#else
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#define HIDRAW_IOCTL_STRUCT_ALIGN(n)
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#endif
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/* Compatible with usb_gen_descriptor structure */
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struct hidraw_gen_descriptor {
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#ifdef COMPAT_32BIT
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uint64_t hgd_data;
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#else
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void *hgd_data;
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#endif
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uint16_t hgd_lang_id;
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uint16_t hgd_maxlen;
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uint16_t hgd_actlen;
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uint16_t hgd_offset;
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uint8_t hgd_config_index;
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uint8_t hgd_string_index;
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uint8_t hgd_iface_index;
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uint8_t hgd_altif_index;
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uint8_t hgd_endpt_index;
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uint8_t hgd_report_type;
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uint8_t reserved[8];
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} HIDRAW_IOCTL_STRUCT_ALIGN(8);
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struct hidraw_report_descriptor {
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uint32_t size;
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uint8_t value[HID_MAX_DESCRIPTOR_SIZE];
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} HIDRAW_IOCTL_STRUCT_ALIGN(4);
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struct hidraw_devinfo {
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uint32_t bustype;
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int16_t vendor;
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int16_t product;
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} HIDRAW_IOCTL_STRUCT_ALIGN(4);
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/* FreeBSD uhid(4)-compatible ioctl interface */
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#define HIDRAW_GET_REPORT_DESC _IOWR('U', 21, struct hidraw_gen_descriptor)
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#define HIDRAW_SET_IMMED _IOW ('U', 22, int)
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#define HIDRAW_GET_REPORT _IOWR('U', 23, struct hidraw_gen_descriptor)
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#define HIDRAW_SET_REPORT _IOW ('U', 24, struct hidraw_gen_descriptor)
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#define HIDRAW_GET_REPORT_ID _IOR ('U', 25, int)
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#define HIDRAW_SET_REPORT_DESC _IOW ('U', 26, struct hidraw_gen_descriptor)
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/* Linux hidraw-compatible ioctl interface */
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#define HIDIOCGRDESCSIZE _IOR('U', 30, int)
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#define HIDIOCGRDESC _IO ('U', 31)
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#define HIDIOCGRAWINFO _IOR('U', 32, struct hidraw_devinfo)
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#define HIDIOCGRAWNAME(len) _IOC(IOC_OUT, 'U', 33, len)
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#define HIDIOCGRAWPHYS(len) _IOC(IOC_OUT, 'U', 34, len)
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#define HIDIOCSFEATURE(len) _IOC(IOC_IN, 'U', 35, len)
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#define HIDIOCGFEATURE(len) _IOC(IOC_INOUT, 'U', 36, len)
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#define HIDIOCGRAWUNIQ(len) _IOC(IOC_OUT, 'U', 37, len)
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#endif /* _HID_HIDRAW_H */
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