Shuah Khan | b96da0f | 2016-06-17 18:06:36 -0600 | [diff] [blame] | 1 | /* |
| 2 | * media_device_open.c - Media Controller Device Open Test |
| 3 | * |
| 4 | * Copyright (c) 2016 Shuah Khan <shuahkh@osg.samsung.com> |
| 5 | * Copyright (c) 2016 Samsung Electronics Co., Ltd. |
| 6 | * |
| 7 | * This file is released under the GPLv2. |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * This file adds a test for Media Controller API. |
| 12 | * This test should be run as root and should not be |
| 13 | * included in the Kselftest run. This test should be |
| 14 | * run when hardware and driver that makes use Media |
| 15 | * Controller API are present in the system. |
| 16 | * |
| 17 | * This test opens user specified Media Device and calls |
| 18 | * MEDIA_IOC_DEVICE_INFO ioctl, closes the file, and exits. |
| 19 | * |
| 20 | * Usage: |
| 21 | * sudo ./media_device_open -d /dev/mediaX |
| 22 | * |
| 23 | * Run this test is a loop and run bind/unbind on the driver. |
| 24 | */ |
| 25 | |
| 26 | #include <stdio.h> |
| 27 | #include <unistd.h> |
| 28 | #include <stdlib.h> |
| 29 | #include <errno.h> |
| 30 | #include <string.h> |
| 31 | #include <fcntl.h> |
| 32 | #include <sys/ioctl.h> |
| 33 | #include <sys/stat.h> |
| 34 | #include <linux/media.h> |
| 35 | |
| 36 | int main(int argc, char **argv) |
| 37 | { |
| 38 | int opt; |
| 39 | char media_device[256]; |
| 40 | int count = 0; |
| 41 | struct media_device_info mdi; |
| 42 | int ret; |
| 43 | int fd; |
| 44 | |
| 45 | if (argc < 2) { |
| 46 | printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
| 47 | exit(-1); |
| 48 | } |
| 49 | |
| 50 | /* Process arguments */ |
| 51 | while ((opt = getopt(argc, argv, "d:")) != -1) { |
| 52 | switch (opt) { |
| 53 | case 'd': |
| 54 | strncpy(media_device, optarg, sizeof(media_device) - 1); |
| 55 | media_device[sizeof(media_device)-1] = '\0'; |
| 56 | break; |
| 57 | default: |
| 58 | printf("Usage: %s [-d </dev/mediaX>]\n", argv[0]); |
| 59 | exit(-1); |
| 60 | } |
| 61 | } |
| 62 | |
| 63 | if (getuid() != 0) { |
| 64 | printf("Please run the test as root - Exiting.\n"); |
| 65 | exit(-1); |
| 66 | } |
| 67 | |
| 68 | /* Open Media device and keep it open */ |
| 69 | fd = open(media_device, O_RDWR); |
| 70 | if (fd == -1) { |
| 71 | printf("Media Device open errno %s\n", strerror(errno)); |
| 72 | exit(-1); |
| 73 | } |
| 74 | |
| 75 | ret = ioctl(fd, MEDIA_IOC_DEVICE_INFO, &mdi); |
| 76 | if (ret < 0) |
| 77 | printf("Media Device Info errno %s\n", strerror(errno)); |
| 78 | else |
| 79 | printf("Media device model %s driver %s\n", |
| 80 | mdi.model, mdi.driver); |
| 81 | } |