initial f200 touchscreen support

[ginge.git] / loader / emu.c

diff --git a/loader/emu.c b/loader/emu.c
index d142611..5adcc5d 100644 (file)
--- a/loader/emu.c
+++ b/loader/emu.c
@@ -643,10 +643,10 @@ static void xwrite16(u32 a, u32 d)
         }
         mmsp2.old_mlc_stl_adr = mmsp2.mlc_stl_adr;
         return;
-      case 0x2958:
+      case 0x2958: // MLC_STL_PALLT_A
         mmsp2.mlc_stl_pallt_a = d & 0x1ff;
         return;
-      case 0x295a:
+      case 0x295a: // MLC_STL_PALLT_D
         mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++] = d;
         mmsp2.mlc_stl_pallt_a &= 0x1ff;
         mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
@@ -663,6 +663,14 @@ static void xwrite32(u32 a, u32 d)
   if ((a & 0xfff00000) == 0x7f000000) {
     u32 a_ = a & 0xffff;
     switch (a_) {
+    // GP2X
+    case 0x295a: // MLC_STL_PALLT_D
+      // special unaligned 32bit write, allegro seems to rely on it
+      mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d;
+      mmsp2.mlc_stl_pallt_d[mmsp2.mlc_stl_pallt_a++ & 0x1ff] = d >> 16;
+      mmsp2.mlc_stl_pallt_a &= 0x1ff;
+      mmsp2.v.dirty_pal = DIRTY_PAL_MMSP2;
+      return;
     // Wiz
     case 0x4024: // MLCCONTROL0
     case 0x4058: // MLCCONTROL1
@@ -1051,20 +1059,6 @@ void emu_init(void *map_bottom)
   sigaction(SIGSEGV, &segv_action, NULL);
 }
 
-long emu_read_gpiodev(void *buf, int count)
-{
-  if (count <= 0) {
-    err("gpiodev read %d?\n", count);
-    return -EINVAL;
-  }
-  if (count > 4)
-    count = 4;
-
-  mmsp2.btn_state = host_read_btns();
-  memcpy(buf, &mmsp2.btn_state, count);
-  return count;
-}
-
 static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
 {
   u8 *umem, *umem_end;
@@ -1265,6 +1259,56 @@ fail:
   return -EINVAL;
 }
 
+long emu_do_read(int fd, void *buf, int count)
+{
+  static const char wm97xx_p[] =
+    "5507 0 -831476 0 -4218 16450692 65536"; // from 4.0 fw
+  int ret, pressed = 0, x, y;
+  struct {
+    u16 pressure, x, y;
+  } wm97xx;
+
+  if (count < 0) {
+    err("read(%d, %d)\n", fd, count);
+    return -EINVAL;
+  }
+
+  switch (fd) {
+  case FAKEDEV_GPIO:
+    mmsp2.btn_state = host_read_btns();
+
+    if (count > 4)
+      count = 4;
+    memcpy(buf, &mmsp2.btn_state, count);
+    break;
+  case FAKEDEV_WM97XX:
+    ret = host_read_ts(&pressed, &x, &y);
+    if (ret == 0 && pressed) {
+      wm97xx.pressure = 1;
+      wm97xx.x =        x * 3750 / 1024 + 200;
+      wm97xx.y = 3750 - y * 3750 / 1024 + 200;
+    }
+    else {
+      wm97xx.pressure = 0;
+      wm97xx.x = wm97xx.y = 200;
+    }
+
+    if (count > sizeof(wm97xx))
+      count = sizeof(wm97xx);
+    memcpy(buf, &wm97xx, count);
+    break;
+  case FAKEDEV_WM97XX_P:
+    if (count < sizeof(wm97xx_p))
+      err("incomplete pointercal read\n");
+    strncpy(buf, wm97xx_p, count);
+    break;
+  default:
+    err("read(%d, %d)\n", fd, count);
+    return -EINVAL;
+  }
+  return count;
+}
+
 struct dev_fd_t emu_interesting_fds[] = {
   [IFD_SOUND] = { "/dev/dsp", -1, emu_sound_open },
   { NULL, 0, NULL },
@@ -1363,17 +1407,19 @@ int emu_do_system(const char *command)
   return ret;
 }
 
-int emu_do_execve(const char *filename, char *const argv[], char *const envp[])
+long emu_do_execve(const char *filename, char * const argv[],
+                   char * const envp[])
 {
   const char **new_argv;
   char *prep_path;
-  int i, ret, argc;
+  int i, argc;
+  long ret;
 
   if (filename == NULL)
     return -1;
 
-  if (strstr(filename, "/gp2xmenu") != NULL)
-    exit(0);
+  if (strstr(filename, "gp2xmenu") != NULL)
+    host_forced_exit(0);
 
   for (i = 0; argv[i] != NULL; i++)
     ;
@@ -1398,7 +1444,7 @@ int emu_do_execve(const char *filename, char *const argv[], char *const envp[])
 
   dbg("execve \"%s\" %s \"%s\"\n", new_argv[0], new_argv[1], new_argv[2]);
   ret = execve(new_argv[0], (char **)new_argv, envp);
-  perror("execve");
+  err("execve(%s): %ld\n", new_argv[0], ret);
   return ret;
 }