/*
  Returns whether the Usb is activated.
*/
VALUE Usb_activated(VALUE self)
{
   u32 state = sceUsbGetState();
   return state & PSP_USB_ACTIVATED ? Qtrue : Qfalse;
}

/*
  Establishes the USB connection.
*/
VALUE usbConnect(VALUE self)
{
   sceUsbActivate(0x1c8);
   return Qnil;
}

/*
  Returns whether the cable is connected.
 */
VALUE Usb_connected(VALUE self)
{
   u32 state = sceUsbGetState();
   return state & PSP_USB_CABLE_CONNECTED ? Qtrue : Qfalse;
}

/*
  Disconnects from the USB connection.
*/
VALUE usbDisconnect(VALUE self)
{
   sceUsbDeactivate(0x1c8);
   sceIoDevctl("fatms0:", 0x0240D81E, NULL, 0, NULL, 0 );
   return Qnil;
}

/*
  Returns whether the connection has been established.
*/
VALUE USb_established(VALUE self)
{
   u32 state = sceUsbGetState();
   return state & PSP_USB_CONNECTION_ESTABLISHED ? Qtrue : Qfalse;
}

/*
  Inits the module used for the USB connection.
*/
VALUE initUsb(VALUE self)
{
   if (!loadStartModule("flash0:/kd/chkreg.prx") ||   
       !loadStartModule("flash0:/kd/npdrm.prx") ||
       !loadStartModule("flash0:/kd/semawm.prx") ||
       !loadStartModule("flash0:/kd/usbstor.prx") ||
       !loadStartModule("flash0:/kd/usbstormgr.prx") ||
       !loadStartModule("flash0:/kd/usbstorms.prx") ||
       !loadStartModule("flash0:/kd/usbstorboot.prx"))
      return Qfalse;

   if (sceUsbStart(PSP_USBBUS_DRIVERNAME, 0, 0) != 0)
      return Qfalse;
   if (sceUsbStart(PSP_USBSTOR_DRIVERNAME, 0, 0) != 0)
      return Qfalse;
   if (sceUsbstorBootSetCapacity(0x800000) != 0)
      return Qfalse;

   return Qtrue;
}

/*
  Returns a hash where the different connections states are saved, at
  the following keys: "activated", "connected", and "established".
*/
VALUE usbState(VALUE self)
{
   VALUE ret = rb_hash_new();
   u32 state = sceUsbGetState();
   rb_hash_aset(ret, rb_str_new2("activated"), 
                state & PSP_USB_ACTIVATED ? Qtrue : Qfalse);
   rb_hash_aset(ret, rb_str_new2("connected"), 
                state & PSP_USB_CABLE_CONNECTED ? Qtrue : Qfalse);
   rb_hash_aset(ret, rb_str_new2("established"), 
                state & PSP_USB_CONNECTION_ESTABLISHED ? Qtrue : Qfalse);
   
   return ret;
}

/*
  Stops the USB connection.
*/
VALUE stopUsb(VALUE self)
{
   sceUsbStop(PSP_USBSTOR_DRIVERNAME, 0, 0);
   sceUsbStop(PSP_USBBUS_DRIVERNAME, 0, 0);
   return Qnil;
}