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
  21 static int fdnub[2];
  22 static int analog_init_done;
  23
  24 static const char * const pandora_gpio_keys[KEY_MAX + 1] = {
  25         [0 ... KEY_MAX] = NULL,
  26         [KEY_UP]        = "Up",
  27         [KEY_LEFT]      = "Left",
  28         [KEY_RIGHT]     = "Right",
  29         [KEY_DOWN]      = "Down",
  30         [KEY_HOME]      = "(A)",
  31         [KEY_PAGEDOWN]  = "(X)",
  32         [KEY_END]       = "(B)",
  33         [KEY_PAGEUP]    = "(Y)",
  34         [KEY_RIGHTSHIFT]= "(L)",
  35         [KEY_RIGHTCTRL] = "(R)",
  36         [KEY_LEFTALT]   = "Start",
  37         [KEY_LEFTCTRL]  = "Select",
  38         [KEY_MENU]      = "Pandora",
  39 };
  40
  41 struct in_default_bind in_evdev_defbinds[] = {
  42         { KEY_UP,       IN_BINDTYPE_PLAYER12, DKEY_UP },
  43         { KEY_DOWN,     IN_BINDTYPE_PLAYER12, DKEY_DOWN },
  44         { KEY_LEFT,     IN_BINDTYPE_PLAYER12, DKEY_LEFT },
  45         { KEY_RIGHT,    IN_BINDTYPE_PLAYER12, DKEY_RIGHT },
  46         { KEY_SPACE,    IN_BINDTYPE_EMU, PEVB_MENU },
  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         { 0, 0, 0 }
  58 };
  59
  60 static void analog_init(void)
  61 {
  62         int i, nub;
  63
  64         fdnub[0] = fdnub[1] = -1;
  65
  66         for (i = nub = 0; nub < 2; i++)
  67         {
  68                 long absbits[(ABS_MAX+1) / sizeof(long) / 8];
  69                 int ret, fd, support = 0;
  70                 char name[64];
  71
  72                 snprintf(name, sizeof(name), "/dev/input/event%d", i);
  73                 fd = open(name, O_RDONLY|O_NONBLOCK);
  74                 if (fd == -1) {
  75                         if (errno == EACCES)
  76                                 continue;       /* maybe we can access next one */
  77                         break;
  78                 }
  79
  80                 /* check supported events */
  81                 ret = ioctl(fd, EVIOCGBIT(0, sizeof(support)), &support);
  82                 if (ret == -1) {
  83                         printf("pandora: ioctl failed on %s\n", name);
  84                         goto skip;
  85                 }
  86
  87                 if (!(support & (1 << EV_ABS)))
  88                         goto skip;
  89
  90                 ret = ioctl(fd, EVIOCGNAME(sizeof(name)), name);
  91                 if (ret == -1 || strncmp(name, "nub", 3) != 0)
  92                         goto skip;
  93
  94                 ret = ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits);
  95                 if (ret == -1)
  96                         goto skip;
  97                 if ((absbits[0] & ((1 << ABS_X)|(1 << ABS_Y))) != ((1 << ABS_X)|(1 << ABS_Y)))
  98                         goto skip;
  99
 100                 printf("pandora: found analog #%d \"%s\"\n", nub, name);
 101                 fdnub[nub++] = fd;
 102                 continue;
 103
 104 skip:
 105                 close(fd);
 106         }
 107
 108         if (nub != 2)
 109                 printf("pandora: warning: not all nubs found: %d\n", nub);
 110
 111         analog_init_done = 1;
 112 }
 113
 114 void in_update_analogs(void)
 115 {
 116         int *nubp[2] = { in_a1, in_a2 };
 117         struct input_absinfo ainfo;
 118         int i, fd, v, ret;
 119
 120         if (!analog_init_done)
 121                 analog_init();
 122
 123         for (i = 0; i < 2; i++) {
 124                 fd = fdnub[i];
 125                 if (fd < 0)
 126                         continue;
 127
 128                 ret = ioctl(fd, EVIOCGABS(ABS_X), &ainfo);
 129                 if (ret == -1) {
 130                         perror("ioctl");
 131                         continue;
 132                 }
 133                 v = ainfo.value / 2 + 127;
 134                 nubp[i][0] = v < 0 ? 0 : v;
 135
 136                 ret = ioctl(fd, EVIOCGABS(ABS_Y), &ainfo);
 137                 if (ret == -1) {
 138                         perror("ioctl");
 139                         continue;
 140                 }
 141                 v = ainfo.value / 2 + 127;
 142                 nubp[i][1] = v < 0 ? 0 : v;
 143         }
 144         //printf("%4d %4d %4d %4d\n", in_a1[0], in_a1[1], in_a2[0], in_a2[1]);
 145 }
 146
 147 int pandora_init(void)
 148 {
 149         in_set_config(in_name_to_id("evdev:gpio-keys"), IN_CFG_KEY_NAMES,
 150                       pandora_gpio_keys, sizeof(pandora_gpio_keys));
 151
 152         return 0;
 153 }