Re: port-arm/60021: USB-only boot: uhub0 attaches but uhub1 never appears, no hotplug events; SD-boot sees hub+umass fine

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

[...]

> [ 1.0000040] dwctwo0 at simplebus1: USB controller
> [ 1.0000040] dwctwo0: interrupting on icu irq 9 [ 1.0000040] bcmpmwdog0 at simplebus1: Power management, Reset and Watchdog controller
[...]
> [ 1.3676894] usb0 at dwctwo0: USB revision 2.0
> [ 1.3876912] armpmu0: interrupting on local_intc irq 9
> [ 1.3876912] uhub0 at usb0: NetBSD (0x0000) DWC2 root hub (0x0000), class 9/0, rev 2.00/1.00, addr 1
> [ 1.4776999] sdmmc0: direct I/O error 5, r=6 p=0xffffc000b14fce5c write
> [ 1.4877014] sdmmc0: couldn't enable card: 5 [ 1.5977105] sdmmc1: 4-bit width, 50.000 MHz
> [ 1.5977105] bwfm0 at sdmmc1 function 1
> [ 1.6077105] (manufacturer 0x2d0, product 0xa9a6) at sdmmc1 function 2 not configured
> [ 1.6177115] swwdog0: software watchdog initialized
> [ 1.6177115] WARNING: 3 errors while detecting hardware; check system log.
> [ 1.6277118] boot device: <unknown>
> [ 1.6277118] unknown device major 0xffffffffffffffff
> [ 2.6277792] unknown device major 0xffffffffffffffff
> [ 3.6278463] unknown device major 0xffffffffffffffff
> [ 4.6279139] unknown device major 0xffffffffffffffff
> [ 5.6279809] unknown device major 0xffffffffffffffff
> [ 6.6280471] unknown device major 0xffffffffffffffff
> [ 7.6281136] unknown device major 0xffffffffffffffff
> [ 8.6281796] unknown device major 0xffffffffffffffff
> [ 9.6282456] unknown device major 0xffffffffffffffff
> [ 10.6283119] unknown device major 0xffffffffffffffff
> [ 11.6283785] unknown device major 0xffffffffffffffff
> [ 12.6284449] unknown device major 0xffffffffffffffff
> [ 13.6285113] unknown device major 0xffffffffffffffff
> [ 14.6285777] unknown device major 0xffffffffffffffff
> [ 15.6286439] unknown device major 0xffffffffffffffff
> [ 16.6287103] unknown device major 0xffffffffffffffff
> [ 17.6287768] unknown device major 0xffffffffffffffff
> [ 18.6288429] unknown device major 0xffffffffffffffff
> [ 19.6289094] unknown device major 0xffffffffffffffff
> [ 20.6289757] unknown device major 0xffffffffffffffff
> [ 21.6290416] unknown device major 0xffffffffffffffff
> [ 21.6290416] root device:

This is almost certainly that autoconf doesn't wait (long enough) for sub-ordintate hubs

https://nxr.netbsd.org/xref/src/sys/dev/usb/uhub.c#880

    880 	mutex_enter(&sc->sc_lock);
    881 	sc->sc_explorepending = false;
    882 	for (int i = 0; i < sc->sc_statuslen; i++) {
    883 		if (sc->sc_statuspend[i] != 0) {
    884 			memcpy(sc->sc_status, sc->sc_statuspend,
    885 			    sc->sc_statuslen);
    886 			memset(sc->sc_statuspend, 0, sc->sc_statuslen);
    887 			usb_needs_explore(sc->sc_hub);
    888 			break;
    889 		}
    890 	}
    891 	mutex_exit(&sc->sc_lock);
    892 	if (sc->sc_first_explore) {
    893 		config_pending_decr(sc->sc_dev);
    894 		sc->sc_first_explore = false;
    895 	}
    896