1 | // SPDX-License-Identifier: GPL-2.0 |
2 | |
3 | /* |
4 | * media_device_open.c - Media Controller Device Open Test |
5 | * |
6 | * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com> |
7 | * Copyright (c) 2016 Samsung Electronics Co., Ltd. |
8 | * |
9 | */ |
10 | |
11 | /* |
12 | * This file adds a test for Media Controller API. |
13 | * This test should be run as root and should not be |
14 | * included in the Kselftest run. This test should be |
15 | * run when hardware and driver that makes use Media |
16 | * Controller API are present in the system. |
17 | * |
18 | * This test opens user specified Media Device and calls |
19 | * MEDIA_IOC_DEVICE_INFO ioctl, closes the file, and exits. |
20 | * |
21 | * Usage: |
22 | * sudo ./media_device_open -d /dev/mediaX |
23 | * |
24 | * Run this test is a loop and run bind/unbind on the driver. |
25 | */ |
26 | |
27 | #include <stdio.h> |
28 | #include <unistd.h> |
29 | #include <stdlib.h> |
30 | #include <errno.h> |
31 | #include <string.h> |
32 | #include <fcntl.h> |
33 | #include <sys/ioctl.h> |
34 | #include <sys/stat.h> |
35 | #include <linux/media.h> |
36 | |
37 | #include "../kselftest.h" |
38 | |
39 | int main(int argc, char **argv) |
40 | { |
41 | int opt; |
42 | char media_device[256]; |
43 | int count = 0; |
44 | struct media_device_info mdi; |
45 | int ret; |
46 | int fd; |
47 | |
48 | if (argc < 2) { |
49 | printf("Usage: %s [-d </dev/mediaX>]\n" , argv[0]); |
50 | exit(-1); |
51 | } |
52 | |
53 | /* Process arguments */ |
54 | while ((opt = getopt(argc, argv, "d:" )) != -1) { |
55 | switch (opt) { |
56 | case 'd': |
57 | strncpy(media_device, optarg, sizeof(media_device) - 1); |
58 | media_device[sizeof(media_device)-1] = '\0'; |
59 | break; |
60 | default: |
61 | printf("Usage: %s [-d </dev/mediaX>]\n" , argv[0]); |
62 | exit(-1); |
63 | } |
64 | } |
65 | |
66 | if (getuid() != 0) |
67 | ksft_exit_skip(msg: "Please run the test as root - Exiting.\n" ); |
68 | |
69 | /* Open Media device and keep it open */ |
70 | fd = open(media_device, O_RDWR); |
71 | if (fd == -1) { |
72 | printf("Media Device open errno %s\n" , strerror(errno)); |
73 | exit(-1); |
74 | } |
75 | |
76 | ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); |
77 | if (ret < 0) |
78 | printf("Media Device Info errno %s\n" , strerror(errno)); |
79 | else |
80 | printf("Media device model %s driver %s\n" , |
81 | mdi.model, mdi.driver); |
82 | } |
83 | |