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ehci: fix halt status handling 

When the enable bits for controller / async schedule / periodic schedule
change just make sure we kick the frame timer and let
ehci_advance_periodic_state and ehci_advance_async_state handle the
controller state changes.

This will make ehci set USBSTS_HALT when the controller shutdown is
actually done, once both schedules are in inactive state and the
USBSTS_PSS and USBSTS_ASS bits are clear.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-05-24 12:53:43 +02:00
parent b53f685d63
commit daf25307b4
1 changed files with 24 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
hw/usb/hcd-ehci.c
View File

@ -586,6 +586,17 @@ static inline void ehci_commit_interrupt(EHCIState *s)
s->usbsts_pending = 0;
}
static void ehci_update_halt(EHCIState *s)
{
if (s->usbcmd & USBCMD_RUNSTOP) {
ehci_clear_usbsts(s, USBSTS_HALT);
} else {
if (s->astate == EST_INACTIVE && s->pstate == EST_INACTIVE) {
ehci_set_usbsts(s, USBSTS_HALT);
}
}
}
static void ehci_set_state(EHCIState *s, int async, int state)
{
if (async) {
@ -593,6 +604,7 @@ static void ehci_set_state(EHCIState *s, int async, int state)
s->astate = state;
if (s->astate == EST_INACTIVE) {
ehci_clear_usbsts(s, USBSTS_ASS);
ehci_update_halt(s);
} else {
ehci_set_usbsts(s, USBSTS_ASS);
}
@ -601,6 +613,7 @@ static void ehci_set_state(EHCIState *s, int async, int state)
s->pstate = state;
if (s->pstate == EST_INACTIVE) {
ehci_clear_usbsts(s, USBSTS_PSS);
ehci_update_halt(s);
} else {
ehci_set_usbsts(s, USBSTS_PSS);
}
@ -1138,21 +1151,15 @@ static void ehci_mem_writel(void *ptr, target_phys_addr_t addr, uint32_t val)
break;
}
if ((val & USBCMD_RUNSTOP) && !(s->usbcmd & USBCMD_RUNSTOP)) {
qemu_mod_timer(s->frame_timer, qemu_get_clock_ns(vm_clock));
SET_LAST_RUN_CLOCK(s);
ehci_clear_usbsts(s, USBSTS_HALT);
if (((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & val) !=
((USBCMD_RUNSTOP | USBCMD_PSE | USBCMD_ASE) & s->usbcmd)) {
if (!ehci_enabled(s)) {
qemu_mod_timer(s->frame_timer, qemu_get_clock_ns(vm_clock));
SET_LAST_RUN_CLOCK(s);
}
ehci_update_halt(s);
}
if (!(val & USBCMD_RUNSTOP) && (s->usbcmd & USBCMD_RUNSTOP)) {
qemu_del_timer(s->frame_timer);
qemu_bh_cancel(s->async_bh);
ehci_queues_rip_all(s, 0);
ehci_queues_rip_all(s, 1);
ehci_set_usbsts(s, USBSTS_HALT);
}
/* not supporting dynamic frame list size at the moment */
if ((val & USBCMD_FLS) && !(s->usbcmd & USBCMD_FLS)) {
fprintf(stderr, "attempt to set frame list size -- value %d\n",
@ -2291,7 +2298,7 @@ static void ehci_frame_timer(void *opaque)
frames = ns_elapsed / FRAME_TIMER_NS;
for (i = 0; i < frames; i++) {
if ( !(ehci->usbsts & USBSTS_HALT)) {
if (ehci_enabled(ehci)) {
ehci->frindex += 8;
if (ehci->frindex == 0x00002000) {
@ -2324,7 +2331,9 @@ static void ehci_frame_timer(void *opaque)
*/
qemu_bh_schedule(ehci->async_bh);
qemu_mod_timer(ehci->frame_timer, expire_time);
if (ehci_enabled(ehci)) {
qemu_mod_timer(ehci->frame_timer, expire_time);
}
}
static void ehci_async_bh(void *opaque)