3d295a9f |
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" |
14 | |
15 | static int ifd = -1; |
16 | static int keystate; |
17 | |
18 | static void init(void) |
19 | { |
20 | char buff[64]; |
21 | int i; |
22 | |
23 | for (ifd = -1, i = 0; ; i++) { |
24 | snprintf(buff, sizeof(buff), "/dev/input/event%i", i); |
25 | ifd = open(buff, O_RDONLY | O_NONBLOCK); |
26 | if (ifd == -1) |
27 | break; |
28 | |
29 | ioctl(ifd, EVIOCGNAME(sizeof(buff)), buff); |
30 | |
31 | if (strcasestr(buff, "gpio") != NULL) |
32 | break; |
33 | close(ifd); |
34 | } |
35 | |
36 | if (ifd < 0) |
37 | printf("no input device\n"); |
38 | } |
39 | |
40 | static const struct { |
41 | unsigned short key; |
42 | unsigned short btn; |
43 | } key_map[] = { |
44 | { KEY_LEFT, GP2X_LEFT }, |
45 | { KEY_RIGHT, GP2X_RIGHT }, |
46 | { KEY_UP, GP2X_UP }, |
47 | { KEY_DOWN, GP2X_DOWN }, |
48 | { KEY_PAGEUP, GP2X_Y }, |
49 | { BTN_BASE, GP2X_Y }, |
50 | { KEY_END, GP2X_B }, |
51 | { BTN_BASE2, GP2X_B }, |
52 | { KEY_PAGEDOWN, GP2X_X }, |
53 | { BTN_BASE3, GP2X_X }, |
54 | { KEY_HOME, GP2X_A }, |
55 | { BTN_BASE4, GP2X_A }, |
56 | { KEY_RIGHTSHIFT, GP2X_L }, |
57 | { BTN_TL, GP2X_L }, |
58 | { KEY_RIGHTCTRL, GP2X_R }, |
59 | { BTN_TR, GP2X_R }, |
60 | { KEY_LEFTALT, GP2X_START }, |
61 | { BTN_START, GP2X_START }, |
62 | { KEY_LEFTCTRL, GP2X_SELECT }, |
63 | { BTN_SELECT, GP2X_SELECT }, |
64 | }; |
65 | |
66 | int host_read_btns(void) |
67 | { |
68 | struct input_event ev; |
69 | int i, ret; |
70 | |
71 | if (ifd < 0) |
72 | init(); |
73 | if (ifd < 0) |
74 | return keystate; |
75 | |
76 | while (1) |
77 | { |
78 | ret = read(ifd, &ev, sizeof(ev)); |
79 | if (ret < (int) sizeof(ev)) { |
80 | if (errno != EAGAIN && errno != EWOULDBLOCK) |
81 | perror("evtest: read error"); |
82 | |
83 | return keystate; |
84 | } |
85 | |
86 | if (ev.type != EV_KEY) |
87 | continue; |
88 | |
89 | for (i = 0; i < sizeof(key_map) / sizeof(key_map[0]); i++) { |
90 | if (key_map[i].key != ev.code) |
91 | continue; |
92 | if (ev.value) |
93 | keystate |= (1 << key_map[i].btn); |
94 | else |
95 | keystate &= ~(1 << key_map[i].btn); |
96 | break; |
97 | } |
98 | } |
99 | |
100 | return keystate; |
101 | } |
102 | |