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uhci: Split large bulk out transfers

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Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
This commit is contained in:
Tormod Volden
2026-08-18 15:50:31 +02:00
committed by Lionel Debroux
parent fa4151541a
commit 6c9536afba
1 changed files with 7 additions and 4 deletions
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system/uhci.c
+7 -4
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@@ -387,11 +387,14 @@ static bool out_data_request(const usb_hcd_t *hcd, const usb_ep_t *ep, const usb
build_uhci_td(&ws->td[pkt_num], ep, UHCI_TD_PID_OUT, UHCI_TD_DT(pkt_num & 1), UHCI_TD_IOC_N, buffer, length); pkt_num++;
build_uhci_td(&ws->td[pkt_num], ep, UHCI_TD_PID_IN, UHCI_TD_DT(1), UHCI_TD_IOC_Y, 0, 0);
} else {
// toggle must be preserved across transactions or not?
// IOC or not?
// TODO split long packets as for control out?
// FIXME store toggle per endpoint
static int bulk_pkt_num;
build_uhci_td(&ws->td[pkt_num], ep, UHCI_TD_PID_OUT, UHCI_TD_DT(bulk_pkt_num++ & 1), UHCI_TD_IOC_Y, buffer, length); pkt_num++;
while (length > packet_size) {
build_uhci_td(&ws->td[pkt_num], ep, UHCI_TD_PID_OUT, UHCI_TD_DT(bulk_pkt_num++ & 1), UHCI_TD_IOC_N, buffer, packet_size); pkt_num++;
buffer = (uint8_t *)buffer + packet_size;
length -= packet_size;
}
build_uhci_td(&ws->td[pkt_num], ep, UHCI_TD_PID_OUT, UHCI_TD_DT(bulk_pkt_num++ & 1), UHCI_TD_IOC_Y, buffer, length);
}
write32(&ws->qh[0].qe_link_ptr, (uintptr_t)(&ws->td[0]) | UHCI_LP_TYPE_TD);
return wait_for_uhci_done(ws);