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xhci: fix portsc writes

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Check for port reset first and skip everything else then.
Add sanity checks for PLS updates.
Add PLC notification when entering PLS_U0 state.

This gets host-initiated port resume going on win8.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2013-04-05 14:55:28 +02:00
parent 6d3bc22e31
commit bdfce20df1
2 changed files with 36 additions and 7 deletions
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42
hw/usb/hcd-xhci.c
View File

@ -2592,6 +2592,7 @@ static void xhci_port_notify(XHCIPort *port, uint32_t bits)
if ((port->portsc & bits) == bits) {
return;
}
trace_usb_xhci_port_notify(port->portnr, bits);
port->portsc |= bits;
if (!xhci_running(port->xhci)) {
return;
@ -2798,29 +2799,56 @@ static void xhci_port_write(void *ptr, hwaddr reg,
uint64_t val, unsigned size)
{
XHCIPort *port = ptr;
uint32_t portsc;
uint32_t portsc, notify;
trace_usb_xhci_port_write(port->portnr, reg, val);
switch (reg) {
case 0x00: /* PORTSC */
/* write-1-to-start bits */
if (val & PORTSC_PR) {
xhci_port_reset(port);
break;
}
portsc = port->portsc;
notify = 0;
/* write-1-to-clear bits*/
portsc &= ~(val & (PORTSC_CSC|PORTSC_PEC|PORTSC_WRC|PORTSC_OCC|
PORTSC_PRC|PORTSC_PLC|PORTSC_CEC));
if (val & PORTSC_LWS) {
/* overwrite PLS only when LWS=1 */
uint32_t pls = get_field(val, PORTSC_PLS);
set_field(&portsc, pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, pls);
uint32_t old_pls = get_field(port->portsc, PORTSC_PLS);
uint32_t new_pls = get_field(val, PORTSC_PLS);
switch (new_pls) {
case PLS_U0:
if (old_pls != PLS_U0) {
set_field(&portsc, new_pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, new_pls);
notify = PORTSC_PLC;
}
break;
case PLS_U3:
if (old_pls < PLS_U3) {
set_field(&portsc, new_pls, PORTSC_PLS);
trace_usb_xhci_port_link(port->portnr, new_pls);
}
break;
case PLS_RESUME:
/* windows does this for some reason, don't spam stderr */
break;
default:
fprintf(stderr, "%s: ignore pls write (old %d, new %d)\n",
__func__, old_pls, new_pls);
break;
}
}
/* read/write bits */
portsc &= ~(PORTSC_PP|PORTSC_WCE|PORTSC_WDE|PORTSC_WOE);
portsc |= (val & (PORTSC_PP|PORTSC_WCE|PORTSC_WDE|PORTSC_WOE));
port->portsc = portsc;
/* write-1-to-start bits */
if (val & PORTSC_PR) {
xhci_port_reset(port);
if (notify) {
xhci_port_notify(port, notify);
}
break;
case 0x04: /* PORTPMSC */

1
trace-events
View File

@ -362,6 +362,7 @@ usb_xhci_queue_event(uint32_t vector, uint32_t idx, const char *trb, const char
usb_xhci_fetch_trb(uint64_t addr, const char *name, uint64_t param, uint32_t status, uint32_t control) "addr %016" PRIx64 ", %s, p %016" PRIx64 ", s %08x, c 0x%08x"
usb_xhci_port_reset(uint32_t port) "port %d"
usb_xhci_port_link(uint32_t port, uint32_t pls) "port %d, pls %d"
usb_xhci_port_notify(uint32_t port, uint32_t pls) "port %d, bits %x"
usb_xhci_slot_enable(uint32_t slotid) "slotid %d"
usb_xhci_slot_disable(uint32_t slotid) "slotid %d"
usb_xhci_slot_address(uint32_t slotid) "slotid %d"