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<?php

//Change WordPress Logo Code
function custom_login_logo() {
    echo '<style type="text/css">
        h1 a { background-image:url(' . get_bloginfo('template_directory') . '/images/logo.png) !important; }
    </style>';
}

add_action('login_head', 'custom_login_logo');

//--------------------------------------------------------
//--------------------------------------------------------
//Change Logo Link
function my_login_logo_url() {
    return get_bloginfo( 'url' );
}
add_filter( 'login_headerurl', 'my_login_logo_url' );

function my_login_logo_url_title() {
    return 'Your Site Name and Info';
}
add_filter( 'login_headertitle', 'my_login_logo_url_title' );