USB Hub Ports

use lager::LagerBox;

let lager = LagerBox::from_env()?;
let port = lager.usb("usb1");

port.disable()?;
std::thread::sleep(std::time::Duration::from_secs(1));
port.enable()?;

assert!(port.state()?, "port should be up");

use lager::{LagerBox, UsbDeviceFilter};
use std::time::{Duration, Instant};

let lager = LagerBox::from_env()?;
let port = lager.usb("usb3");

port.disable()?;
std::thread::sleep(Duration::from_millis(500));
port.enable()?;

// Poll the bus until the DUT reappears. usb_devices() is cheap and takes no
// exclusive access, so this loop is safe.
let filter = UsbDeviceFilter { vid: Some("0483".into()), ..Default::default() };
let deadline = Instant::now() + Duration::from_secs(10);
loop {
    if !lager.usb_devices_matching(&filter)?.is_empty() {
        break;
    }
    assert!(Instant::now() < deadline, "DUT did not re-enumerate");
    std::thread::sleep(Duration::from_millis(200));
}