How to populate data if zend form is not validated?

module.config contains form, that is injected into controller

'passwordForm' => function($sm){
    $form = new \Application\Form\PasswordForm();

    $form->setInputFilter(new \Application\Form\PasswordInputFilter());

    return $form;
},

Controller:

if($this->getRequest()->isPost()){
    $form->setData($this->getRequest()->getPost());

    if($form->isValid()){
        //ok
    }
}
return array('form' => $form);

However, if the form is not validated, I see empty fields at form view <?=$this->formRow($this->form->get('passwordOld'));?>

How can I populate not validated values into the form? The key point is that the form is not binded to any object.