shop by brand name in magento - magento

Question

This is brand.php file having directory local/Vilpjsc/brand/Block.I want the brand name with logo(image) sholud display on home page .But I am getting the error i.e Fatal error: Call to a member function getCollection() on a non-object in /var/www/magentodemo/app/code/local/Vilpjsc/Brand/Block/Brand.php on line 25
<?php
class Vilpjsc_Brand_Block_Brand extends Mage_Core_Block_Template {
public function _prepareLayout() {
return parent::_prepareLayout();
}
//Get Collection from Brand Controller
public function getBrand() {
if (!$this->hasData('brand')) {
$this->setData('brand', Mage::registry('brand'));
}
return $this->getData('brand');
}
//Get Brand Featured Collection
public function getFeaturedBrand() {
return $this->getBrand()->getCollection()->setPageSize(12)->addFilter('status', '1');
}
public function resizeImage($img,$width=100, $height=60) {
if (!file_exists("./media/brand/resized"))
mkdir("./media/brand/resized", 0777);
$imageResized = Mage::getBaseDir('media') . DS . "brand" . DS . "resized" . DS . $width."x".$height.$img;
if (!file_exists($imageResized) && file_exists("./media/brand/" . $img)) {
$imageObj = new Varien_Image("./media/brand/" . $img);
$imageObj->constrainOnly(TRUE);
$imageObj->keepAspectRatio(TRUE);
$imageObj->keepFrame(FALSE);
$imageObj->resize($width, $height);
$imageObj->save($imageResized);
}
$newImageUrl = Mage::getBaseUrl('media')."brand/resized/".$width."x".$height.$img;
return $newImageUrl;
}
public function getNormalBrand() {
return $this->getBrand()->getCollection()->addFilter('status', '0');
}
public function getBrandChar() {
extract($this->getBrandKey());
return $this->getBrand()->getCollection()->saveBrandcollection($char);
}
//Create Alphabet navigation
public function navigation() {
extract($this->getBrandKey());
$alphas = range('A', 'Z');
$navigation = "";
$digitClass = "";
foreach ($alphas as $key) {
if ($char == $key)
$class_key = "current_char";
else
$class_key="";
$navigation .= "<li class='key_item " . $class_key . "'><a href='" . Mage::getBaseUrl() . "brand/index/index/brand_key/" . $key . "'>" . $key . "</a></li>";
}
if ($char == "digit") {
$digitClass = "current_char";
} elseif ($char == "all")
$allClass = "current_char";
$navigation = "<li class='key_item " . $digitClass . "'><a href='" . Mage::getBaseUrl() . "brand/index/index/brand_key/digit'>#</a></li>" .
$navigation;
return $navigation;
}
//Get request for brand block
public function getBrandKey() {
$brand_key = Mage::registry('brand_key');
if ($brand_key) {
$char = $brand_key->getParam('brand_key') ? $brand_key->getParam('brand_key') : 'A';
$option_id = $brand_key->getParam('option_id') ? $brand_key->getParam('option_id') : '1';
$brand = $brand_key->getParam('brand') ? $brand_key->getParam('brand') : 'Nike';
} else {
$char = 'digit';
$option_id = '544';
}
return compact('char', 'option_id', 'brand');
}
}