static void bms_timer(void *opaque)
{
MouState *s = (MouState*)opaque;
uint8_t irq_bit;
/* Toggle the IRQ line if interrupts are enabled. */
irq_bit = BMS_IRQ_BIT(s->irq);
if (s->port_c & irq_bit)
{
if (!(s->port_c & BMS_CTL_INT_DIS))
PDMDevHlpISASetIrq(s->CTX_SUFF(pDevIns), s->irq, PDM_IRQ_LEVEL_LOW);
s->port_c &= ~irq_bit;
}
else
{
s->port_c |= irq_bit;
if (!(s->port_c & BMS_CTL_INT_DIS))
PDMDevHlpISASetIrq(s->CTX_SUFF(pDevIns), s->irq, PDM_IRQ_LEVEL_HIGH);
}
/* Handle enabling/disabling of the mouse interface. */
if (s->port_c & BMS_CTL_INT_DIS)
{
if (s->disable_counter)
--s->disable_counter;
if (s->disable_counter == 0 && s->mouse_enabled)
{
s->mouse_enabled = false;
bms_update_downstream_status(s);
}
}
else
{
s->disable_counter = 8; /* Re-arm the disable countdown. */
if (!s->mouse_enabled)
{
s->mouse_enabled = true;
bms_update_downstream_status(s);
}
}
}
/**
* Set the emulated hardware to a known initial state.
*/
static void bms_reset(MouState *pThis)
{
/* Clear the device setup. */
pThis->port_a = pThis->port_b = 0;
pThis->port_c = BMS_CTL_INT_DIS; /* Interrupts disabled. */
pThis->ctrl_port = 0x91; /* Default 8255A setup. */
/* Clear motion/button state. */
pThis->cnt_held = false;
pThis->mouse_dx = pThis->mouse_dy = 0;
pThis->mouse_buttons = 0;
pThis->mouse_buttons_reported = 0;
pThis->disable_counter = 0;
pThis->irq_toggle_counter = 1000;
if (pThis->mouse_enabled)
{
pThis->mouse_enabled = false;
bms_update_downstream_status(pThis);
}
}
