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usb-hid: add hid_has_events() 

Add hid_has_events function, use it to figure whenever there are pending
events instead of checking and updating USBHIDState->changed.

Setting ->changed to 1 on init is removed, that should have absolutely
no effect as the initial state of ->idle is 0 so we report hid state
anyway until the guest configures some idle time.  Also should clear
->idle on reset.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2011-07-15 14:46:39 +02:00
parent 8bde680541
commit 38931fa8cf
1 changed files with 7 additions and 9 deletions
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16
hw/usb-hid.c
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@ -88,7 +88,6 @@ typedef struct USBHIDState {
int32_t protocol;
uint8_t idle;
int64_t next_idle_clock;
int changed;
void *datain_opaque;
void (*datain)(void *);
} USBHIDState;
@ -444,12 +443,15 @@ static const uint8_t usb_hid_usage_keys[0x100] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static bool hid_has_events(HIDState *hs)
{
return hs->n > 0;
}
static void usb_hid_changed(HIDState *hs)
{
USBHIDState *us = container_of(hs, USBHIDState, hid);
us->changed = 1;
if (us->datain) {
us->datain(us->datain_opaque);
}
@ -742,6 +744,7 @@ static void usb_hid_handle_reset(USBDevice *dev)
hid_handle_reset(&us->hid);
us->protocol = 1;
us->idle = 0;
}
static void usb_hid_set_next_idle(USBHIDState *s, int64_t curtime)
@ -798,7 +801,6 @@ static int usb_hid_handle_control(USBDevice *dev, USBPacket *p,
} else if (hs->kind == HID_KEYBOARD) {
ret = hid_keyboard_poll(hs, data, length);
}
us->changed = hs->n > 0;
break;
case SET_REPORT:
if (hs->kind == HID_KEYBOARD) {
@ -849,7 +851,7 @@ static int usb_hid_handle_data(USBDevice *dev, USBPacket *p)
case USB_TOKEN_IN:
if (p->devep == 1) {
int64_t curtime = qemu_get_clock_ns(vm_clock);
if (!us->changed &&
if (!hid_has_events(hs) &&
(!us->idle || us->next_idle_clock - curtime > 0)) {
return USB_RET_NAK;
}
@ -860,7 +862,6 @@ static int usb_hid_handle_data(USBDevice *dev, USBPacket *p)
ret = hid_keyboard_poll(hs, buf, p->iov.size);
}
usb_packet_copy(p, buf, ret);
us->changed = hs->n > 0;
} else {
goto fail;
}
@ -914,9 +915,6 @@ static int usb_hid_initfn(USBDevice *dev, int kind)
usb_desc_init(dev);
hid_init(&us->hid, kind, usb_hid_changed);
/* Force poll routine to be run and grab input the first time. */
us->changed = 1;
return 0;
}