static uint32_t events_read(void *x, target_phys_addr_t off)
{
events_state *s = (events_state *) x;
int offset = off; // - s->base;
/* This gross hack below is used to ensure that we
* only raise the IRQ when the kernel driver is
* properly ready! If done before this, the driver
* becomes confused and ignores all input events
* as soon as one was buffered!
*/
if (offset == REG_LEN && s->page == PAGE_ABSDATA) {
if (s->state == STATE_BUFFERED)
qemu_irq_raise(s->irq);
s->state = STATE_LIVE;
}
if (offset == REG_READ)
return dequeue_event(s);
else if (offset == REG_LEN)
return get_page_len(s);
else if (offset >= REG_DATA)
return get_page_data(s, offset - REG_DATA);
return 0; // this shouldn't happen, if the driver does the right thing
}
static uint32_t events_read(void *x, target_phys_addr_t off)
{
events_state *s = (events_state *) x;
int offset = off; // - s->base;
if (offset == REG_READ)
return dequeue_event(s);
else if (offset == REG_LEN)
return get_page_len(s);
else if (offset >= REG_DATA)
return get_page_data(s, offset - REG_DATA);
return 0; // this shouldn't happen, if the driver does the right thing
}
static int get_page_data(events_state *s, int offset)
{
int page_len = get_page_len(s);
int page = s->page;
if (offset > page_len)
return 0;
if (page == PAGE_NAME)
return s->name[offset];
if (page >= PAGE_EVBITS && page <= PAGE_EVBITS + EV_MAX)
return s->ev_bits[page - PAGE_EVBITS].bits[offset];
if (page == PAGE_ABSDATA)
return s->abs_info[offset / sizeof(s->abs_info[0])];
return 0;
}
