| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <linux/input.h> |
| 4 | #include <sys/ioctl.h> |
| 5 | #include <sys/types.h> |
| 6 | #include <sys/stat.h> |
| 7 | #include <fcntl.h> |
| 8 | #include <unistd.h> |
| 9 | #include <sys/io.h> |
| 10 | |
| 11 | int main() |
| 12 | { |
| 13 | int i, ret, fd; |
| 14 | int dpad = 0; |
| 15 | |
| 16 | for (i = 0;; i++) |
| 17 | { |
| 18 | int support = 0; |
| 19 | char name[64]; |
| 20 | |
| 21 | snprintf(name, sizeof(name), "/dev/input/event%d", i); |
| 22 | fd = open(name, O_RDONLY); |
| 23 | if (fd == -1) |
| 24 | break; |
| 25 | |
| 26 | /* check supported events */ |
| 27 | ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support); |
| 28 | if (ret == -1) { |
| 29 | printf("ioctl failed on %s\n", name); |
| 30 | goto skip; |
| 31 | } |
| 32 | |
| 33 | if (!(support & (1 << EV_KEY))) |
| 34 | goto skip; |
| 35 | if (!(support & (1 << EV_ABS))) |
| 36 | goto skip; |
| 37 | |
| 38 | ioctl(fd, EVIOCGNAME(sizeof(name)), name); |
| 39 | printf("found \"%s\" (type %08x)\n", name, support); |
| 40 | break; |
| 41 | |
| 42 | skip: |
| 43 | close(fd); |
| 44 | fd = -1; |
| 45 | } |
| 46 | |
| 47 | if (fd == -1) { |
| 48 | printf("no suitable devs\n"); |
| 49 | return 1; |
| 50 | } |
| 51 | |
| 52 | ret = ioperm(888, 3, 1); |
| 53 | if (ret != 0) { |
| 54 | perror("ioperm"); |
| 55 | return 1; |
| 56 | } |
| 57 | |
| 58 | outb(0xc0, 890); /* switch to output mode, TL and TR high */ |
| 59 | outb(0x0f, 888); /* Dx high */ |
| 60 | |
| 61 | while (1) |
| 62 | { |
| 63 | struct input_event ev; |
| 64 | int rd; |
| 65 | |
| 66 | rd = read(fd, &ev, sizeof(ev)); |
| 67 | if (rd < (int) sizeof(ev)) { |
| 68 | perror("in_evdev: error reading"); |
| 69 | return 1; |
| 70 | } |
| 71 | |
| 72 | if (ev.type == EV_KEY) { |
| 73 | int val = 0xc0; |
| 74 | if (ev.code & 1) { |
| 75 | if (ev.value) |
| 76 | val |= 2; |
| 77 | else |
| 78 | val &= ~2; |
| 79 | } else { |
| 80 | if (ev.value) |
| 81 | val |= 8; |
| 82 | else |
| 83 | val &= ~8; |
| 84 | } |
| 85 | outb(val, 890); |
| 86 | } |
| 87 | else if (ev.type == EV_ABS) |
| 88 | { |
| 89 | if (ev.code == ABS_X) { |
| 90 | if (ev.value < 128) |
| 91 | dpad |= 4; |
| 92 | else if (ev.value > 128) |
| 93 | dpad |= 8; |
| 94 | else |
| 95 | dpad &= ~0x0c; |
| 96 | } |
| 97 | if (ev.code == ABS_Y) { |
| 98 | if (ev.value < 128) |
| 99 | dpad |= 1; |
| 100 | else if (ev.value > 128) |
| 101 | dpad |= 2; |
| 102 | else |
| 103 | dpad &= ~3; |
| 104 | } |
| 105 | outb(~dpad & 0x0f, 888); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | return 0; |
| 110 | } |
| 111 | |