Scan hub for already-connected devices

[Hustin7]

I added a few lines in my copy of hub.c that let it detect devices that were already plugged into the hub.

static void hub_port_get_status_complete (tuh_xfer_t* xfer);
static void hub_get_status_complete (tuh_xfer_t* xfer);
static void connection_clear_conn_change_complete (tuh_xfer_t* xfer);
static void connection_port_reset_complete (tuh_xfer_t* xfer);

static void config_port_power_complete (tuh_xfer_t* xfer)
{
  TU_ASSERT(XFER_RESULT_SUCCESS == xfer->result, );

  uint8_t const daddr = xfer->daddr;
  hub_interface_t* p_hub = get_itf(daddr);

  if (xfer->setup->wIndex == p_hub->port_count)
  {
    // All ports are power -> queue notification status endpoint and
    // complete the SET CONFIGURATION
    TU_ASSERT( usbh_edpt_xfer(daddr, p_hub->ep_in, &p_hub->status_change, 1), );

    usbh_driver_set_config_complete(daddr, p_hub->itf_num);

    //!! Poll the ports to see if anything is already connected

    for (uint8_t port=1; port <= p_hub->port_count; port++)
    {
      hub_port_get_status(daddr, port, &p_hub->port_status, hub_port_get_status_complete, 0);
    }
  }else
  {
    // power next port
    uint8_t const hub_port = (uint8_t) (xfer->setup->wIndex + 1);
    hub_port_set_feature(daddr, hub_port, HUB_FEATURE_PORT_POWER, config_port_power_complete, 0);
  }
}

[hathach]

it should already work, though can you explain which scenario this new code fix ?