static int ohci_service_td(OHCIState *ohci, struct ohci_ed *ed)
{
int dir;
- size_t len = 0;
+ size_t len = 0, pktlen = 0;
#ifdef DEBUG_PACKET
const char *str = NULL;
#endif
len = (td.be - td.cbp) + 1;
}
- if (len && dir != OHCI_TD_DIR_IN && !completion) {
- ohci_copy_td(ohci, &td, ohci->usb_buf, len, 0);
+ pktlen = len;
+ if (len && dir != OHCI_TD_DIR_IN) {
+ /* The endpoint may not allow us to transfer it all now */
+ pktlen = (ed->flags & OHCI_ED_MPS_MASK) >> OHCI_ED_MPS_SHIFT;
+ if (pktlen > len) {
+ pktlen = len;
+ }
+ if (!completion) {
+ ohci_copy_td(ohci, &td, ohci->usb_buf, pktlen, 0);
+ }
}
}
flag_r = (td.flags & OHCI_TD_R) != 0;
#ifdef DEBUG_PACKET
- DPRINTF(" TD @ 0x%.8x %" PRId64 " bytes %s r=%d cbp=0x%.8x be=0x%.8x\n",
- addr, (int64_t)len, str, flag_r, td.cbp, td.be);
+ DPRINTF(" TD @ 0x%.8x %" PRId64 " of %" PRId64
+ " bytes %s r=%d cbp=0x%.8x be=0x%.8x\n",
+ addr, (int64_t)pktlen, (int64_t)len, str, flag_r, td.cbp, td.be);
- if (len > 0 && dir != OHCI_TD_DIR_IN) {
+ if (pktlen > 0 && dir != OHCI_TD_DIR_IN) {
DPRINTF(" data:");
- for (i = 0; i < len; i++)
+ for (i = 0; i < pktlen; i++) {
printf(" %.2x", ohci->usb_buf[i]);
+ }
DPRINTF("\n");
}
#endif
usb_packet_setup(&ohci->usb_packet, pid,
OHCI_BM(ed->flags, ED_FA),
OHCI_BM(ed->flags, ED_EN));
- usb_packet_addbuf(&ohci->usb_packet, ohci->usb_buf, len);
+ usb_packet_addbuf(&ohci->usb_packet, ohci->usb_buf, pktlen);
ret = usb_handle_packet(dev, &ohci->usb_packet);
if (ret != USB_RET_NODEV)
break;
DPRINTF("\n");
#endif
} else {
- ret = len;
+ ret = pktlen;
}
}
/* Writeback */
- if (ret == len || (dir == OHCI_TD_DIR_IN && ret >= 0 && flag_r)) {
+ if (ret == pktlen || (dir == OHCI_TD_DIR_IN && ret >= 0 && flag_r)) {
/* Transmission succeeded. */
if (ret == len) {
td.cbp = 0;
OHCI_SET_BM(td.flags, TD_CC, OHCI_CC_NOERROR);
OHCI_SET_BM(td.flags, TD_EC, 0);
+ if ((dir != OHCI_TD_DIR_IN) && (ret != len)) {
+ /* Partial packet transfer: TD not ready to retire yet */
+ goto exit_no_retire;
+ }
+
+ /* Setting ED_C is part of the TD retirement process */
ed->head &= ~OHCI_ED_C;
if (td.flags & OHCI_TD_T0)
ed->head |= OHCI_ED_C;
i = OHCI_BM(td.flags, TD_DI);
if (i < ohci->done_count)
ohci->done_count = i;
+exit_no_retire:
ohci_put_td(ohci, addr, &td);
return OHCI_BM(td.flags, TD_CC) != OHCI_CC_NOERROR;
}