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ehci: create ehci_update_frindex

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Factor out code from ehci_frame_timer.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-05-24 13:28:32 +02:00
parent 863b474163
commit 6ceced0b2e
1 changed files with 23 additions and 12 deletions
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35
hw/usb/hcd-ehci.c
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@ -2280,6 +2280,28 @@ static void ehci_advance_periodic_state(EHCIState *ehci)
}
}
static void ehci_update_frindex(EHCIState *ehci, int frames)
{
int i;
if (!ehci_enabled(ehci)) {
return;
}
for (i = 0; i < frames; i++) {
ehci->frindex += 8;
if (ehci->frindex == 0x00002000) {
ehci_set_interrupt(ehci, USBSTS_FLR);
}
if (ehci->frindex == 0x00004000) {
ehci_set_interrupt(ehci, USBSTS_FLR);
ehci->frindex = 0;
}
}
}
static void ehci_frame_timer(void *opaque)
{
EHCIState *ehci = opaque;
@ -2296,18 +2318,7 @@ static void ehci_frame_timer(void *opaque)
frames = ns_elapsed / FRAME_TIMER_NS;
for (i = 0; i < frames; i++) {
if (ehci_enabled(ehci)) {
ehci->frindex += 8;
if (ehci->frindex == 0x00002000) {
ehci_set_interrupt(ehci, USBSTS_FLR);
}
if (ehci->frindex == 0x00004000) {
ehci_set_interrupt(ehci, USBSTS_FLR);
ehci->frindex = 0;
}
}
ehci_update_frindex(ehci, 1);
if (frames - i > ehci->maxframes) {
skipped_frames++;