CPIA_COMMAND_GetExposure
do_command(gspca_dev, CPIA_COMMAND_GetExposure, 0, 0, 0, 0);
case CPIA_COMMAND_GetExposure:
case CPIA_COMMAND_GetExposure:
return do_command(gspca_dev, CPIA_COMMAND_GetExposure, 0, 0, 0, 0);