The official docs reference the component Swiper as the base of the ion-slides component, so the API should be the same as the one described in http://idangero.us/swiper/api/.
You could use the option autoplayDisableOnInteraction to avoid disabling auto play after the user interaction.
Your options array should be:
homeOptions = {
initialSlide: 0,
loop: true,
autoplay:2000,
autoplayDisableOnInteraction: false
};
Hope it helps.