/* Service an endpoint list. Returns nonzero if active TD were found. */
static int ohci_service_ed_list(OHCIState *ohci, uint32_t head, int completion)
{
struct ohci_ed ed;
uint32_t next_ed;
uint32_t cur;
int active;
active = 0;
if (head == 0)
return 0;
for (cur = head; cur; cur = next_ed) {
if (!ohci_read_ed(ohci, cur, &ed)) {
fprintf(stderr, "usb-ohci: ED read error at %x\n", cur);
return 0;
}
next_ed = ed.next & OHCI_DPTR_MASK;
if ((ed.head & OHCI_ED_H) || (ed.flags & OHCI_ED_K)) {
uint32_t addr;
/* Cancel pending packets for ED that have been paused. */
addr = ed.head & OHCI_DPTR_MASK;
if (ohci->async_td && addr == ohci->async_td) {
usb_cancel_packet(&ohci->usb_packet);
ohci->async_td = 0;
}
continue;
}
while ((ed.head & OHCI_DPTR_MASK) != ed.tail) {
#ifdef DEBUG_PACKET
DPRINTF("ED @ 0x%.8x fa=%u en=%u d=%u s=%u k=%u f=%u mps=%u "
"h=%u c=%u\n head=0x%.8x tailp=0x%.8x next=0x%.8x\n", cur,
OHCI_BM(ed.flags, ED_FA), OHCI_BM(ed.flags, ED_EN),
OHCI_BM(ed.flags, ED_D), (ed.flags & OHCI_ED_S)!= 0,
(ed.flags & OHCI_ED_K) != 0, (ed.flags & OHCI_ED_F) != 0,
OHCI_BM(ed.flags, ED_MPS), (ed.head & OHCI_ED_H) != 0,
(ed.head & OHCI_ED_C) != 0, ed.head & OHCI_DPTR_MASK,
ed.tail & OHCI_DPTR_MASK, ed.next & OHCI_DPTR_MASK);
#endif
active = 1;
if ((ed.flags & OHCI_ED_F) == 0) {
if (ohci_service_td(ohci, &ed))
break;
} else {
/* Handle isochronous endpoints */
if (ohci_service_iso_td(ohci, &ed, completion))
break;
}
}
ohci_put_ed(ohci, cur, &ed);
}
return active;
}
/* Do frame processing on frame boundary */
static void ohci_frame_boundary(void *opaque)
{
OHCIState *ohci = opaque;
struct ohci_hcca hcca;
ohci_read_hcca(ohci, ohci->hcca, &hcca);
/* Process all the lists at the end of the frame */
if (ohci->ctl & OHCI_CTL_PLE) {
int n;
n = ohci->frame_number & 0x1f;
ohci_service_ed_list(ohci, le32_to_cpu(hcca.intr[n]), 0);
}
/* Cancel all pending packets if either of the lists has been disabled. */
if (ohci->async_td &&
ohci->old_ctl & (~ohci->ctl) & (OHCI_CTL_BLE | OHCI_CTL_CLE)) {
usb_cancel_packet(&ohci->usb_packet);
ohci->async_td = 0;
}
ohci->old_ctl = ohci->ctl;
ohci_process_lists(ohci, 0);
/* Frame boundary, so do EOF stuf here */
ohci->frt = ohci->fit;
/* Increment frame number and take care of endianness. */
ohci->frame_number = (ohci->frame_number + 1) & 0xffff;
hcca.frame = cpu_to_le16(ohci->frame_number);
if (ohci->done_count == 0 && !(ohci->intr_status & OHCI_INTR_WD)) {
if (!ohci->done)
abort();
if (ohci->intr & ohci->intr_status)
ohci->done |= 1;
hcca.done = cpu_to_le32(ohci->done);
ohci->done = 0;
ohci->done_count = 7;
ohci_set_interrupt(ohci, OHCI_INTR_WD);
}
if (ohci->done_count != 7 && ohci->done_count != 0)
ohci->done_count--;
/* Do SOF stuff here */
ohci_sof(ohci);
/* Writeback HCCA */
ohci_put_hcca(ohci, ohci->hcca, &hcca);
}
/* Reset the controller */
static void ohci_reset(void *opaque)
{
OHCIState *ohci = opaque;
OHCIPort *port;
int i;
ohci_bus_stop(ohci);
ohci->ctl = 0;
ohci->old_ctl = 0;
ohci->status = 0;
ohci->intr_status = 0;
ohci->intr = OHCI_INTR_MIE;
ohci->hcca = 0;
ohci->ctrl_head = ohci->ctrl_cur = 0;
ohci->bulk_head = ohci->bulk_cur = 0;
ohci->per_cur = 0;
ohci->done = 0;
ohci->done_count = 7;
/* FSMPS is marked TBD in OCHI 1.0, what gives ffs?
* I took the value linux sets ...
*/
ohci->fsmps = 0x2778;
ohci->fi = 0x2edf;
ohci->fit = 0;
ohci->frt = 0;
ohci->frame_number = 0;
ohci->pstart = 0;
ohci->lst = OHCI_LS_THRESH;
ohci->rhdesc_a = OHCI_RHA_NPS | ohci->num_ports;
ohci->rhdesc_b = 0x0; /* Impl. specific */
ohci->rhstatus = 0;
for (i = 0; i < ohci->num_ports; i++)
{
port = &ohci->rhport[i];
port->ctrl = 0;
if (port->port.dev) {
usb_attach(&port->port, port->port.dev);
}
}
if (ohci->async_td) {
usb_cancel_packet(&ohci->usb_packet);
ohci->async_td = 0;
}
DPRINTF("usb-ohci: Reset %s\n", ohci->name);
}
static void usb_ohci_exit(PCIDevice *dev)
{
OHCIPCIState *ohci = PCI_OHCI(dev);
OHCIState *s = &ohci->state;
trace_usb_ohci_exit(s->name);
ohci_bus_stop(s);
if (s->async_td) {
usb_cancel_packet(&s->usb_packet);
s->async_td = 0;
}
ohci_stop_endpoints(s);
if (!ohci->masterbus) {
usb_bus_release(&s->bus);
}
timer_del(s->eof_timer);
timer_free(s->eof_timer);
}
