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ehci: update status bits in ehci_set_state 

Update the status register in the ehci_set_state function, to make sure
the guest-visible register is in sync with our internal schedule state.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-05-24 12:34:18 +02:00
parent ec807d12bd
commit b53f685d63
1 changed files with 10 additions and 4 deletions
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14
hw/usb/hcd-ehci.c
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@ -591,9 +591,19 @@ static void ehci_set_state(EHCIState *s, int async, int state)
if (async) {
trace_usb_ehci_state("async", state2str(state));
s->astate = state;
if (s->astate == EST_INACTIVE) {
ehci_clear_usbsts(s, USBSTS_ASS);
} else {
ehci_set_usbsts(s, USBSTS_ASS);
}
} else {
trace_usb_ehci_state("periodic", state2str(state));
s->pstate = state;
if (s->pstate == EST_INACTIVE) {
ehci_clear_usbsts(s, USBSTS_PSS);
} else {
ehci_set_usbsts(s, USBSTS_PSS);
}
}
}
@ -2170,14 +2180,12 @@ static void ehci_advance_async_state(EHCIState *ehci)
if (!ehci_async_enabled(ehci)) {
break;
}
ehci_set_usbsts(ehci, USBSTS_ASS);
ehci_set_state(ehci, async, EST_ACTIVE);
// No break, fall through to ACTIVE
case EST_ACTIVE:
if (!ehci_async_enabled(ehci)) {
ehci_queues_rip_all(ehci, async);
ehci_clear_usbsts(ehci, USBSTS_ASS);
ehci_set_state(ehci, async, EST_INACTIVE);
break;
}
@ -2229,7 +2237,6 @@ static void ehci_advance_periodic_state(EHCIState *ehci)
switch(ehci_get_state(ehci, async)) {
case EST_INACTIVE:
if (!(ehci->frindex & 7) && ehci_periodic_enabled(ehci)) {
ehci_set_usbsts(ehci, USBSTS_PSS);
ehci_set_state(ehci, async, EST_ACTIVE);
// No break, fall through to ACTIVE
} else
@ -2238,7 +2245,6 @@ static void ehci_advance_periodic_state(EHCIState *ehci)
case EST_ACTIVE:
if (!(ehci->frindex & 7) && !ehci_periodic_enabled(ehci)) {
ehci_queues_rip_all(ehci, async);
ehci_clear_usbsts(ehci, USBSTS_PSS);
ehci_set_state(ehci, async, EST_INACTIVE);
break;
}