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This commit is contained in:
Nick Hibma 2000-01-26 08:46:41 +00:00
parent 00a8a57954
commit 06ffae8586
1 changed files with 27 additions and 6 deletions
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33
sys/dev/usb/ohci.c
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@ -970,20 +970,41 @@ ohci_intr1(sc)
intrs = 0;
done = LE(sc->sc_hcca->hcca_done_head);
/* The LSb of done is used to inform the HC Driver that an interrupt
* condition exists for both the Done list and for another event
* recorded in HcInterruptStatus. On an interrupt from the HC, the HC
* Driver checks the HccaDoneHead Value. If this value is 0, then the
* interrupt was caused by other than the HccaDoneHead update and the
* HcInterruptStatus register needs to be accessed to determine that
* exact interrupt cause. If HccaDoneHead is nonzero, then a Done list
* update interrupt is indicated and if the LSb of done is nonzero,
* then an additional interrupt event is indicated and
* HcInterruptStatus should be checked to determine its cause.
*/
if (done != 0) {
sc->sc_hcca->hcca_done_head = 0;
if (done & ~OHCI_DONE_INTRS)
intrs = OHCI_WDH;
if (done & OHCI_DONE_INTRS)
if (done & OHCI_DONE_INTRS) {
intrs |= OREAD4(sc, OHCI_INTERRUPT_STATUS);
} else
done &= ~OHCI_DONE_INTRS;
}
} else {
intrs = OREAD4(sc, OHCI_INTERRUPT_STATUS);
}
if (!intrs)
if (intrs == 0) {
/* nothing to be done ?! */
return (0);
}
intrs &= ~OHCI_MIE;
OWRITE4(sc, OHCI_INTERRUPT_STATUS, intrs); /* Acknowledge */
intrs &= ~OHCI_MIE; /* mask out Master Interrupt Enable */
/* Acknowledge any interrupts that have happened */
OWRITE4(sc, OHCI_INTERRUPT_STATUS, intrs);
/* Any interrupts we had enabled? */
eintrs = intrs & sc->sc_eintrs;
if (!eintrs)
return (0);
@ -1000,7 +1021,7 @@ ohci_intr1(sc)
intrs &= ~OHCI_SO;
}
if (eintrs & OHCI_WDH) {
ohci_process_done(sc, done &~ OHCI_DONE_INTRS);
ohci_process_done(sc, done);
intrs &= ~OHCI_WDH;
}
if (eintrs & OHCI_RD) {