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Re: Fixing the ubsa driver
On Fri, Jul 11, 2008 at 10:06:31PM +0200, Frank Wille wrote:
> Since beginning of this year the ubsa driver has ceased working, and I was
> trying to find the reasons since quite some time. I am using an Option N.V.
> MC3G card for testing.
> Today I would say that there are at least two bugs.
> The first was already mentioned in this thread from February:
> Chavdar Ivanov and me both reported an NMI (entering the debugger) when
> inserting a cardbus card in our HP NX6310.
> With my card it looked like
> ohci0 at cardbus0 function 0: vendor 0x1045 product 0xc861 (rev. 0x10)
> NMI ... going to debugger
> > cont
> ohci0: interrupting at 10
> ohci0: OHCI version 1.0, legacy support
> usb5 at ohci0: USB revision 1.0
> uhub5 at usb5
> uhub5: Opti OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
> uhub5: 2 ports with 2 removable, self powered
> ugen0 at uhub5 port 1
> ugen0: Vodafone Vodafone Mobile Connect Card - 3G, rev 2.00/0.00, addr 2
> I solved the NMI problem by the following hack in ohci_cardbus_attach():
> --- cardbus/CVS/Base/ohci_cardbus.c 2008-06-28 14:09:48.000000000 +0200
> +++ cardbus/ohci_cardbus.c 2008-07-11 21:26:17.000000000 +0200
> @@ -132,8 +132,10 @@
> /* Disable interrupts, so we don't can any spurious ones. */
> +#if 0
> bus_space_write_4(sc->sc.iot, sc->sc.ioh, OHCI_INTERRUPT_DISABLE,
> sc->sc_cc = cc;
> sc->sc_cf = cf;
> This is certainly plain wrong. But it helps for the moment. Maybe somebody
> else has a better idea what to investigate?
Now that I'm looking at ohci_cardbus_attach(), there are some obvious
problems. All of this code should run before we attempt to read/write
/* Enable the device. */
csr = cardbus_conf_read(cc, cf, ca->ca_tag,
cardbus_conf_write(cc, cf, ca->ca_tag, CARDBUS_COMMAND_STATUS_REG,
csr | CARDBUS_COMMAND_MASTER_ENABLE
I will move the bus_space_write_4() call to right above the call to
cardbus_intr_establish(), and check that in.
David Young OJC Technologies
dyoung%ojctech.com@localhost Urbana, IL * (217) 278-3933 ext 24
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