add preliminary blitter; fb, input handling

[ginge.git] / loader / host_pnd.c

diff --git a/loader/host_pnd.c b/loader/host_pnd.c
new file mode 100644 (file)
index 0000000..773a087
--- /dev/null
+++ b/loader/host_pnd.c
@@ -0,0 +1,102 @@
+// vim:shiftwidth=2:expandtab
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <linux/input.h>
+
+#include "header.h"
+
+static int ifd = -1;
+static int keystate;
+
+static void init(void)
+{
+  char buff[64];
+  int i;
+
+  for (ifd = -1, i = 0; ; i++) {
+    snprintf(buff, sizeof(buff), "/dev/input/event%i", i);
+    ifd = open(buff, O_RDONLY | O_NONBLOCK);
+    if (ifd == -1)
+      break;
+
+    ioctl(ifd, EVIOCGNAME(sizeof(buff)), buff);
+
+    if (strcasestr(buff, "gpio") != NULL)
+      break;
+    close(ifd);
+  }
+
+  if (ifd < 0)
+    printf("no input device\n");
+}
+
+static const struct {
+  unsigned short key;
+  unsigned short btn;
+} key_map[] = {
+  { KEY_LEFT,       GP2X_LEFT },
+  { KEY_RIGHT,      GP2X_RIGHT },
+  { KEY_UP,         GP2X_UP },
+  { KEY_DOWN,       GP2X_DOWN },
+  { KEY_PAGEUP,     GP2X_Y },
+  { BTN_BASE,       GP2X_Y },
+  { KEY_END,        GP2X_B },
+  { BTN_BASE2,      GP2X_B },
+  { KEY_PAGEDOWN,   GP2X_X },
+  { BTN_BASE3,      GP2X_X },
+  { KEY_HOME,       GP2X_A },
+  { BTN_BASE4,      GP2X_A },
+  { KEY_RIGHTSHIFT, GP2X_L },
+  { BTN_TL,         GP2X_L },
+  { KEY_RIGHTCTRL,  GP2X_R },
+  { BTN_TR,         GP2X_R },
+  { KEY_LEFTALT,    GP2X_START },
+  { BTN_START,      GP2X_START },
+  { KEY_LEFTCTRL,   GP2X_SELECT },
+  { BTN_SELECT,     GP2X_SELECT },
+};
+
+int host_read_btns(void)
+{
+  struct input_event ev;
+  int i, ret;
+
+  if (ifd < 0)
+    init();
+  if (ifd < 0)
+    return keystate;
+
+  while (1)
+  {
+    ret = read(ifd, &ev, sizeof(ev));
+    if (ret < (int) sizeof(ev)) {
+      if (errno != EAGAIN && errno != EWOULDBLOCK)
+        perror("evtest: read error");
+
+      return keystate;
+    }
+
+    if (ev.type != EV_KEY)
+      continue;
+
+    for (i = 0; i < sizeof(key_map) / sizeof(key_map[0]); i++) {
+      if (key_map[i].key != ev.code)
+        continue;
+      if (ev.value)
+        keystate |=  (1 << key_map[i].btn);
+      else
+        keystate &= ~(1 << key_map[i].btn);
+      break;
+    }
+  }
+
+  return keystate;
+}
+