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usb/hid: add hid_pointer_activate, use it 

HID reorganziation broke the usb tablet in windows xp.  The reason is
that xp activates idle before it starts polling, which creates a
chicken-and-egg issue:  We don't call hid_pointer_poll because there are
no pending events.  We don't get any events because the activation code
in hid_pointer_poll is never executed and thus all pointer events are
routed to the PS/2 mouse by qemu.

Fix this by creating a hid_pointer_activate function and call it from
usb-hid when the guest sets the idle state.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-08-09 12:35:57 +02:00
parent b9c6cbff76
commit 21635e121a
3 changed files with 13 additions and 4 deletions
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13
hw/hid.c
View File

@ -218,16 +218,21 @@ static inline int int_clamp(int val, int vmin, int vmax)
}
}
void hid_pointer_activate(HIDState *hs)
{
if (!hs->ptr.mouse_grabbed) {
qemu_activate_mouse_event_handler(hs->ptr.eh_entry);
hs->ptr.mouse_grabbed = 1;
}
}
int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len)
{
int dx, dy, dz, b, l;
int index;
HIDPointerEvent *e;
if (!hs->ptr.mouse_grabbed) {
qemu_activate_mouse_event_handler(hs->ptr.eh_entry);
hs->ptr.mouse_grabbed = 1;
}
hid_pointer_activate(hs);
/* When the buffer is empty, return the last event. Relative
movements will all be zero. */

1
hw/hid.h
View File

@ -51,6 +51,7 @@ void hid_free(HIDState *hs);
bool hid_has_events(HIDState *hs);
void hid_set_next_idle(HIDState *hs, int64_t curtime);
void hid_pointer_activate(HIDState *hs);
int hid_pointer_poll(HIDState *hs, uint8_t *buf, int len);
int hid_keyboard_poll(HIDState *hs, uint8_t *buf, int len);
int hid_keyboard_write(HIDState *hs, uint8_t *buf, int len);

3
hw/usb-hid.c
View File

@ -454,6 +454,9 @@ static int usb_hid_handle_control(USBDevice *dev, USBPacket *p,
case SET_IDLE:
hs->idle = (uint8_t) (value >> 8);
hid_set_next_idle(hs, qemu_get_clock_ns(vm_clock));
if (hs->kind == HID_MOUSE || hs->kind == HID_TABLET) {
hid_pointer_activate(hs);
}
ret = 0;
break;
default: