selftests: add media_device_open test

Add a new media test to open, run ioctl, and close the media device file.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

2 files changed, 83 insertions, 2 deletions

diff --git a/tools/testing/selftests/media_tests/Makefile b/tools/testing/selftests/media_tests/Makefile
index 7071bcc1d066..177256aa4e0a 100644
--- a/tools/testing/selftests/media_tests/Makefile
+++ b/tools/testing/selftests/media_tests/Makefile
@@ -1,7 +1,7 @@
-TEST_PROGS := media_device_test
+TEST_PROGS := media_device_test media_device_open
 all: $(TEST_PROGS)
 
 include ../lib.mk
 
 clean:
-        rm -fr media_device_test
+        rm -fr media_device_test media_device_open
diff --git a/tools/testing/selftests/media_tests/media_device_open.c b/tools/testing/selftests/media_tests/media_device_open.c
new file mode 100644
index 000000000000..44343c091a20
--- /dev/null
+++ b/tools/testing/selftests/media_tests/media_device_open.c
@@ -0,0 +1,81 @@
+/*
+ * 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 is released under the GPLv2.
+ */
+
+/*
+ * 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);
+}