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Rev | Author | Line No. | Line |
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3 | daniel-mar | 1 | |
2 | // https://gist.github.com/x2q/5124616 |
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3 | // https://www.raspberrypi.org/forums/viewtopic.php?t=86265https://www.raspberrypi.org/forums/viewtopic.php?t=86265 |
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4 | |||
5 | /* usbreset -- send a USB port reset to a USB device |
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6 | * |
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7 | * Compile using: gcc -o usbreset usbreset.c |
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8 | * |
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9 | * |
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10 | * */ |
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11 | |||
12 | |||
13 | |||
14 | |||
15 | #include <stdio.h> |
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16 | #include <unistd.h> |
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17 | #include <fcntl.h> |
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18 | #include <errno.h> |
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19 | #include <sys/ioctl.h> |
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20 | |||
21 | #include <linux/usbdevice_fs.h> |
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22 | |||
23 | |||
24 | int main(int argc, char **argv) |
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25 | { |
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26 | const char *filename; |
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27 | int fd; |
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28 | int rc; |
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29 | |||
30 | if (argc != 2) { |
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31 | fprintf(stderr, "Usage: usbreset device-filename\n"); |
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32 | return 1; |
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33 | } |
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34 | filename = argv[1]; |
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35 | |||
36 | fd = open(filename, O_WRONLY); |
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37 | if (fd < 0) { |
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38 | perror("Error opening output file"); |
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39 | return 1; |
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40 | } |
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41 | |||
42 | printf("Resetting USB device %s\n", filename); |
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43 | rc = ioctl(fd, USBDEVFS_RESET, 0); |
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44 | if (rc < 0) { |
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45 | perror("Error in ioctl"); |
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46 | return 1; |
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47 | } |
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48 | printf("Reset successful\n"); |
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49 | |||
50 | close(fd); |
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51 | return 0; |
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52 | } |