1*4882a593Smuzhiyun /* SPDX-License-Identifier: LGPL-2.0+ WITH Linux-syscall-note */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * userio: virtual serio device support 4*4882a593Smuzhiyun * Copyright (C) 2015 Red Hat 5*4882a593Smuzhiyun * Copyright (C) 2015 Lyude (Stephen Chandler Paul) <cpaul@redhat.com> 6*4882a593Smuzhiyun * 7*4882a593Smuzhiyun * This program is free software; you can redistribute it and/or modify it 8*4882a593Smuzhiyun * under the terms of the GNU Lesser General Public License as published by the 9*4882a593Smuzhiyun * Free Software Foundation; either version 2 of the License, or (at your 10*4882a593Smuzhiyun * option) any later version. 11*4882a593Smuzhiyun * 12*4882a593Smuzhiyun * This program is distributed in the hope that it will be useful, but WITHOUT 13*4882a593Smuzhiyun * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 14*4882a593Smuzhiyun * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 15*4882a593Smuzhiyun * details. 16*4882a593Smuzhiyun * 17*4882a593Smuzhiyun * This is the public header used for user-space communication with the userio 18*4882a593Smuzhiyun * driver. __attribute__((__packed__)) is used for all structs to keep ABI 19*4882a593Smuzhiyun * compatibility between all architectures. 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #ifndef _USERIO_H 23*4882a593Smuzhiyun #define _USERIO_H 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun #include <linux/types.h> 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun enum userio_cmd_type { 28*4882a593Smuzhiyun USERIO_CMD_REGISTER = 0, 29*4882a593Smuzhiyun USERIO_CMD_SET_PORT_TYPE = 1, 30*4882a593Smuzhiyun USERIO_CMD_SEND_INTERRUPT = 2 31*4882a593Smuzhiyun }; 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* 34*4882a593Smuzhiyun * userio Commands 35*4882a593Smuzhiyun * All commands sent to /dev/userio are encoded using this structure. The type 36*4882a593Smuzhiyun * field should contain a USERIO_CMD* value that indicates what kind of command 37*4882a593Smuzhiyun * is being sent to userio. The data field should contain the accompanying 38*4882a593Smuzhiyun * argument for the command, if there is one. 39*4882a593Smuzhiyun */ 40*4882a593Smuzhiyun struct userio_cmd { 41*4882a593Smuzhiyun __u8 type; 42*4882a593Smuzhiyun __u8 data; 43*4882a593Smuzhiyun } __attribute__((__packed__)); 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #endif /* !_USERIO_H */ 46