how to get all attribute details

$objEavAttribute = Mage::getModel('catalog/product') -> getResource() -> getAttribute('manufacturer');
if($objEavAttribute->getFrontendInput() == 'select' || $objEavAttribute->getFrontendInput() == 'multiselect' || $objEavAttribute->getFrontendInput() == 'boolean')
{
echo $_product->getAttributeText($value);
}
else
{
echo $_product->getData($value);
}