How to "talk" with USB device via my module? - driver

Question

I've written my module for gamepad that plugged by USB. I've already checked that my installed module detects my device successfully and even calls "probe" method:
static struct usb_driver driver =
{
.name = "Driver#1",
.id_table = table,
.probe = probe,
.disconnect = disconnect,
};
I have also written special urb function, that should "talk" with my device
usb_fill_int_urb(j->irq_in, udev,
usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress), //!
j->idata, 32, irq_hh,
j, ep_irq_in->bInterval);
But I cannot understand how to initialize action of irq_in. I presume that I need to press something and some information should be written in j->idata. I also did
usb_submit_urb(j->irq_in, GFP_KERNEL);
But nothing happens! Why?
My probe function:
static void irq_hh(struct urb *urb)
{
struct devicec *j = urb->context;/*В какую структура из всех процессов дб заполнена после приёма данных???*/
char *data = j->idata;
printk(KERN_INFO "irq_hh: %s", data);
}
static int probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct usb_device *udev; //!
struct usb_endpoint_descriptor *ep_irq_in;
int ep_irq_in_idx, error;
printk(KERN_INFO "probe...%X",id->idVendor);
j = kzalloc(sizeof(struct devicec), GFP_KERNEL);
udev = interface_to_usbdev(intf);
j->irq_in = usb_alloc_urb(0, GFP_KERNEL);
//--------------------------------------
j->udev = udev;
j->intf = intf;
//--------------------------------------
usb_make_path(udev, j->phys, sizeof(j->phys));
strlcat(j->phys, "/input101", sizeof(j->phys));
printk(KERN_INFO "%s",j->phys);
ep_irq_in_idx = 0;
ep_irq_in = &intf->cur_altsetting->endpoint[ep_irq_in_idx].desc;
usb_fill_int_urb(j->irq_in, udev,
usb_rcvintpipe(udev, ep_irq_in->bEndpointAddress), //!
j->idata, 32, irq_hh,
j, ep_irq_in->bInterval);
j->irq_in->transfer_dma = j->idata_dma;
j->irq_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
error = usb_submit_urb(j->irq_in, GFP_KERNEL);
printk(KERN_INFO "%d",error);
return 0;
}