frontend/pandora.c

   1 /*
   2  * (C) notaz, 2011
   3  *
   4  * This work is licensed under the terms of the GNU GPLv2 or later.
   5  * See the COPYING file in the top-level directory.
   6  */
   7
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12 #include <fcntl.h>
  13 #include <sys/ioctl.h>
  14 #include <unistd.h>
  15 #include <linux/input.h>
  16 #include <errno.h>
  17
  18 #include "common/input.h"
  19 #include "plugin_lib.h"
  20 #include "main.h"
  21
  22 static int fdnub[2];
  23 static int analog_init_done;
  24
  25 static const char * const pandora_gpio_keys[KEY_MAX + 1] = {
  26         [0 ... KEY_MAX] = NULL,
  27         [KEY_UP]        = "Up",
  28         [KEY_LEFT]      = "Left",
  29         [KEY_RIGHT]     = "Right",
  30         [KEY_DOWN]      = "Down",
  31         [KEY_HOME]      = "(A)",
  32         [KEY_PAGEDOWN]  = "(X)",
  33         [KEY_END]       = "(B)",
  34         [KEY_PAGEUP]    = "(Y)",
  35         [KEY_RIGHTSHIFT]= "(L)",
  36         [KEY_RIGHTCTRL] = "(R)",
  37         [KEY_LEFTALT]   = "Start",
  38         [KEY_LEFTCTRL]  = "Select",
  39         [KEY_MENU]      = "Pandora",
  40 };
  41
  42 struct in_default_bind in_evdev_defbinds[] = {
  43         { KEY_UP,       IN_BINDTYPE_PLAYER12, DKEY_UP },
  44         { KEY_DOWN,     IN_BINDTYPE_PLAYER12, DKEY_DOWN },
  45         { KEY_LEFT,     IN_BINDTYPE_PLAYER12, DKEY_LEFT },
  46         { KEY_RIGHT,    IN_BINDTYPE_PLAYER12, DKEY_RIGHT },
  47         { KEY_PAGEUP,   IN_BINDTYPE_PLAYER12, DKEY_TRIANGLE },
  48         { KEY_PAGEDOWN, IN_BINDTYPE_PLAYER12, DKEY_CROSS },
  49         { KEY_END,      IN_BINDTYPE_PLAYER12, DKEY_CIRCLE },
  50         { KEY_HOME,     IN_BINDTYPE_PLAYER12, DKEY_SQUARE },
  51         { KEY_LEFTALT,  IN_BINDTYPE_PLAYER12, DKEY_START },
  52         { KEY_LEFTCTRL, IN_BINDTYPE_PLAYER12, DKEY_SELECT },
  53         { KEY_RIGHTSHIFT,IN_BINDTYPE_PLAYER12, DKEY_L1 },
  54         { KEY_RIGHTCTRL, IN_BINDTYPE_PLAYER12, DKEY_R1 },
  55         { KEY_Q,        IN_BINDTYPE_PLAYER12, DKEY_L2 },
  56         { KEY_P,        IN_BINDTYPE_PLAYER12, DKEY_R2 },
  57         { KEY_SPACE,    IN_BINDTYPE_EMU, SACTION_ENTER_MENU },
  58         { KEY_1,        IN_BINDTYPE_EMU, SACTION_SAVE_STATE },
  59         { KEY_2,        IN_BINDTYPE_EMU, SACTION_LOAD_STATE },
  60         { KEY_3,        IN_BINDTYPE_EMU, SACTION_PREV_SSLOT },
  61         { KEY_4,        IN_BINDTYPE_EMU, SACTION_NEXT_SSLOT },
  62         { KEY_5,        IN_BINDTYPE_EMU, SACTION_TOGGLE_FSKIP },
  63         { 0, 0, 0 }
  64 };
  65
  66 static void analog_init(void)
  67 {
  68         int i, nub;
  69
  70         fdnub[0] = fdnub[1] = -1;
  71
  72         for (i = nub = 0; nub < 2; i++)
  73         {
  74                 long absbits[(ABS_MAX+1) / sizeof(long) / 8];
  75                 int ret, fd, support = 0;
  76                 char name[64];
  77
  78                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
  79                 fd = open(name, O_RDONLY|O_NONBLOCK);
  80                 if (fd == -1) {
  81                         if (errno == EACCES)
  82                                 continue;       /* maybe we can access next one */
  83                         break;
  84                 }
  85
  86                 /* check supported events */
  87                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
  88                 if (ret == -1) {
  89                         printf("pandora: ioctl failed on %s\n", name);
  90                         goto skip;
  91                 }
  92
  93                 if (!(support & (1 << EV_ABS)))
  94                         goto skip;
  95
  96                 ret = ioctl(fd, EVIOCGNAME(sizeof(name)), name);
  97                 if (ret == -1 || strncmp(name, "nub", 3) != 0)
  98                         goto skip;
  99
 100                 ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
 101                 if (ret == -1)
 102                         goto skip;
 103                 if ((absbits[0] & ((1 << ABS_X)|(1 << ABS_Y))) != ((1 << ABS_X)|(1 << ABS_Y)))
 104                         goto skip;
 105
 106                 printf("pandora: found analog #%d \"%s\"\n", nub, name);
 107                 fdnub[nub++] = fd;
 108                 continue;
 109
 110 skip:
 111                 close(fd);
 112         }
 113
 114         if (nub != 2)
 115                 printf("pandora: warning: not all nubs found: %d\n", nub);
 116
 117         analog_init_done = 1;
 118 }
 119
 120 void in_update_analogs(void)
 121 {
 122         int *nubp[2] = { in_a1, in_a2 };
 123         struct input_absinfo ainfo;
 124         int i, fd, v, ret;
 125
 126         if (!analog_init_done)
 127                 analog_init();
 128
 129         for (i = 0; i < 2; i++) {
 130                 fd = fdnub[i];
 131                 if (fd < 0)
 132                         continue;
 133
 134                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 135                 if (ret == -1) {
 136                         perror("ioctl");
 137                         continue;
 138                 }
 139                 v = ainfo.value / 2 + 127;
 140                 nubp[i][0] = v < 0 ? 0 : v;
 141
 142                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 143                 if (ret == -1) {
 144                         perror("ioctl");
 145                         continue;
 146                 }
 147                 v = ainfo.value / 2 + 127;
 148                 nubp[i][1] = v < 0 ? 0 : v;
 149         }
 150         //printf("%4d %4d %4d %4d\n", in_a1[0], in_a1[1], in_a2[0], in_a2[1]);
 151 }
 152
 153 int pandora_init(void)
 154 {
 155         in_set_config(in_name_to_id("evdev:gpio-keys"), IN_CFG_KEY_NAMES,
 156                       pandora_gpio_keys, sizeof(pandora_gpio_keys));
 157
 158         return 0;
 159 }