| 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 | |