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1 | // vim:shiftwidth=2:expandtab |
2 | #define _GNU_SOURCE |
3 | #include <stdio.h> |
4 | #include <string.h> |
5 | #include <sys/types.h> |
6 | #include <sys/stat.h> |
7 | #include <fcntl.h> |
8 | #include <unistd.h> |
9 | #include <sys/ioctl.h> |
10 | #include <errno.h> |
11 | #include <linux/input.h> |
12 | |
13 | #include "header.h" |
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14 | #include "realfuncs.h" |
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15 | |
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16 | static int ifds[2] = { -1, -1 }; |
17 | static int init_done; |
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18 | static int keystate; |
19 | |
20 | static void init(void) |
21 | { |
22 | char buff[64]; |
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23 | int i, ifd, ret; |
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24 | |
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25 | for (ifd = -1, i = 0; ifds[0] == -1 || ifds[1] == -1; i++) { |
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26 | snprintf(buff, sizeof(buff), "/dev/input/event%i", i); |
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27 | ifd = open(buff, O_RDONLY | O_NONBLOCK, 0); |
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28 | if (ifd == -1) |
29 | break; |
30 | |
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31 | ret = ioctl(ifd, EVIOCGNAME(sizeof(buff)), buff); |
32 | if (ret < 0) |
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33 | break; |
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34 | |
35 | if (strcasestr(buff, "gpio") != NULL) { |
36 | ifds[0] = ifd; |
37 | continue; |
38 | } |
39 | if (strcasestr(buff, "keypad") != NULL) { |
40 | ifds[1] = ifd; |
41 | continue; |
42 | } |
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43 | close(ifd); |
44 | } |
45 | |
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46 | if (ifds[0] < 0) |
47 | fprintf(stderr, PFX "missing buttons\n"); |
48 | if (ifds[1] < 0) |
49 | fprintf(stderr, PFX "missing keypad\n"); |
50 | init_done = 1; |
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51 | } |
52 | |
53 | static const struct { |
54 | unsigned short key; |
55 | unsigned short btn; |
56 | } key_map[] = { |
57 | { KEY_LEFT, GP2X_LEFT }, |
58 | { KEY_RIGHT, GP2X_RIGHT }, |
59 | { KEY_UP, GP2X_UP }, |
60 | { KEY_DOWN, GP2X_DOWN }, |
61 | { KEY_PAGEUP, GP2X_Y }, |
62 | { BTN_BASE, GP2X_Y }, |
63 | { KEY_END, GP2X_B }, |
64 | { BTN_BASE2, GP2X_B }, |
65 | { KEY_PAGEDOWN, GP2X_X }, |
66 | { BTN_BASE3, GP2X_X }, |
67 | { KEY_HOME, GP2X_A }, |
68 | { BTN_BASE4, GP2X_A }, |
69 | { KEY_RIGHTSHIFT, GP2X_L }, |
70 | { BTN_TL, GP2X_L }, |
71 | { KEY_RIGHTCTRL, GP2X_R }, |
72 | { BTN_TR, GP2X_R }, |
73 | { KEY_LEFTALT, GP2X_START }, |
74 | { BTN_START, GP2X_START }, |
75 | { KEY_LEFTCTRL, GP2X_SELECT }, |
76 | { BTN_SELECT, GP2X_SELECT }, |
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77 | { KEY_COMMA, GP2X_VOL_DOWN }, |
78 | { KEY_DOT, GP2X_VOL_UP }, |
79 | { KEY_Q, GP2X_PUSH }, |
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80 | }; |
81 | |
82 | int host_read_btns(void) |
83 | { |
84 | struct input_event ev; |
85 | int i, ret; |
86 | |
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87 | if (!init_done) |
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88 | init(); |
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89 | |
90 | while (1) |
91 | { |
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92 | ret = read(ifds[0], &ev, sizeof(ev)); |
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93 | if (ret < (int) sizeof(ev)) { |
94 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
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95 | perror(PFX "read error"); |
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96 | |
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97 | ret = read(ifds[1], &ev, sizeof(ev)); |
98 | if (ret < (int) sizeof(ev)) |
99 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
100 | perror(PFX "read error"); |
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101 | } |
102 | |
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103 | if (ret < (int) sizeof(ev)) |
104 | return keystate; |
105 | |
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106 | if (ev.type != EV_KEY) |
107 | continue; |
108 | |
109 | for (i = 0; i < sizeof(key_map) / sizeof(key_map[0]); i++) { |
110 | if (key_map[i].key != ev.code) |
111 | continue; |
112 | if (ev.value) |
113 | keystate |= (1 << key_map[i].btn); |
114 | else |
115 | keystate &= ~(1 << key_map[i].btn); |
116 | break; |
117 | } |
118 | } |
119 | |
120 | return keystate; |
121 | } |
122 | |