| // SPDX-License-Identifier: GPL-2.0 |
| |
| /* |
| * media_device_open.c - Media Controller Device Open Test |
| * |
| * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com> |
| * Copyright (c) 2016 Samsung Electronics Co., Ltd. |
| * |
| */ |
| |
| /* |
| * This file adds a test for Media Controller API. |
| * This test should be run as root and should not be |
| * included in the Kselftest run. This test should be |
| * run when hardware and driver that makes use Media |
| * Controller API are present in the system. |
| * |
| * This test opens user specified Media Device and calls |
| * MEDIA_IOC_DEVICE_INFO ioctl, closes the file, and exits. |
| * |
| * Usage: |
| * sudo ./media_device_open -d /dev/mediaX |
| * |
| * Run this test is a loop and run bind/unbind on the driver. |
| */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <linux/media.h> |
| |
| int main(int argc, char **argv) |
| { |
| int opt; |
| char media_device[256]; |
| int count = 0; |
| struct media_device_info mdi; |
| int ret; |
| int fd; |
| |
| if (argc < 2) { |
| printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
| exit(-1); |
| } |
| |
| /* Process arguments */ |
| while ((opt = getopt(argc, argv, "d:")) != -1) { |
| switch (opt) { |
| case 'd': |
| strncpy(media_device, optarg, sizeof(media_device) - 1); |
| media_device[sizeof(media_device)-1] = '\0'; |
| break; |
| default: |
| printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
| exit(-1); |
| } |
| } |
| |
| if (getuid() != 0) { |
| printf("Please run the test as root - Exiting.\n"); |
| exit(-1); |
| } |
| |
| /* Open Media device and keep it open */ |
| fd = open(media_device, O_RDWR); |
| if (fd == -1) { |
| printf("Media Device open errno %s\n", strerror(errno)); |
| exit(-1); |
| } |
| |
| ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); |
| if (ret < 0) |
| printf("Media Device Info errno %s\n", strerror(errno)); |
| else |
| printf("Media device model %s driver %s\n", |
| mdi.model, mdi.driver); |
| } |