macio/pmu.c: remove redundant code

Now that the logic related to edge-triggered interrupts is all contained within
the mos6522 device the redundant implementation for the mac99 PMU device can
be removed.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220305150957.5053-13-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/misc/macio/pmu.c

@@ -57,19 +57,6 @@
 
 #define VIA_TIMER_FREQ (4700000 / 6)
 
-static void via_update_irq(PMUState *s)
-{
-    MOS6522PMUState *mps = MOS6522_PMU(&s->mos6522_pmu);
-    MOS6522State *ms = MOS6522(mps);
-
-    bool new_state = !!(ms->ifr & ms->ier & (SR_INT | T1_INT | T2_INT));
-
-    if (new_state != s->via_irq_state) {
-        s->via_irq_state = new_state;
-        qemu_set_irq(s->via_irq, new_state);
-    }
-}
-
 static void via_set_sr_int(void *opaque)
 {
     PMUState *s = opaque;
@@ -808,28 +795,9 @@ static void mos6522_pmu_portB_write(MOS6522State *s)
     MOS6522PMUState *mps = container_of(s, MOS6522PMUState, parent_obj);
     PMUState *ps = container_of(mps, PMUState, mos6522_pmu);
 
-    if ((s->pcr & 0xe0) == 0x20 || (s->pcr & 0xe0) == 0x60) {
-        s->ifr &= ~CB2_INT;
-    }
-    s->ifr &= ~CB1_INT;
-
-    via_update_irq(ps);
     pmu_update(ps);
 }
 
-static void mos6522_pmu_portA_write(MOS6522State *s)
-{
-    MOS6522PMUState *mps = container_of(s, MOS6522PMUState, parent_obj);
-    PMUState *ps = container_of(mps, PMUState, mos6522_pmu);
-
-    if ((s->pcr & 0x0e) == 0x02 || (s->pcr & 0x0e) == 0x06) {
-        s->ifr &= ~CA2_INT;
-    }
-    s->ifr &= ~CA1_INT;
-
-    via_update_irq(ps);
-}
-
 static void mos6522_pmu_reset(DeviceState *dev)
 {
     MOS6522State *ms = MOS6522(dev);
@@ -853,7 +821,6 @@ static void mos6522_pmu_class_init(ObjectClass *oc, void *data)
     device_class_set_parent_reset(dc, mos6522_pmu_reset,
                                   &mdc->parent_reset);
     mdc->portB_write = mos6522_pmu_portB_write;
-    mdc->portA_write = mos6522_pmu_portA_write;
 }
 
 static const TypeInfo mos6522_pmu_type_info = {

include/hw/misc/macio/pmu.h

@@ -193,8 +193,6 @@ struct PMUState {
 
     MemoryRegion mem;
     uint64_t frequency;
-    qemu_irq via_irq;
-    bool via_irq_state;
 
     /* PMU state */
     MOS6522PMUState mos6522_pmu;