mos6522: switch over to use qdev gpios for IRQs

For historical reasons each mos6522 instance implements its own setting and
update of the IFR flag bits using methods exposed by MOS6522DeviceClass. As
of today this is no longer required, and it is now possible to implement
the mos6522 IRQs as standard qdev gpios.

Switch over to use qdev gpios for the mos6522 device and update all instances
accordingly.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20220305150957.5053-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

6 files changed, 31 insertions, 56 deletions

diff --git a/hw/misc/mac_via.c b/hw/misc/mac_via.c
index 71b74c3..80eb433 100644
--- a/hw/misc/mac_via.c
+++ b/hw/misc/mac_via.c
@@ -325,10 +325,9 @@ static void via1_sixty_hz(void *opaque)
 {
     MOS6522Q800VIA1State *v1s = opaque;
     MOS6522State *s = MOS6522(v1s);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
+    qemu_irq irq = qdev_get_gpio_in(DEVICE(s), VIA1_IRQ_60HZ_BIT);
 
-    s->ifr |= VIA1_IRQ_60HZ;
-    mdc->update_irq(s);
+    qemu_set_irq(irq, 1);
 
     via1_sixty_hz_update(v1s);
 }
@@ -337,44 +336,13 @@ static void via1_one_second(void *opaque)
 {
     MOS6522Q800VIA1State *v1s = opaque;
     MOS6522State *s = MOS6522(v1s);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
+    qemu_irq irq = qdev_get_gpio_in(DEVICE(s), VIA1_IRQ_ONE_SECOND_BIT);
 
-    s->ifr |= VIA1_IRQ_ONE_SECOND;
-    mdc->update_irq(s);
+    qemu_set_irq(irq, 1);
 
     via1_one_second_update(v1s);
 }
 
-static void via1_irq_request(void *opaque, int irq, int level)
-{
-    MOS6522Q800VIA1State *v1s = opaque;
-    MOS6522State *s = MOS6522(v1s);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
-
-    if (level) {
-        s->ifr |= 1 << irq;
-    } else {
-        s->ifr &= ~(1 << irq);
-    }
-
-    mdc->update_irq(s);
-}
-
-static void via2_irq_request(void *opaque, int irq, int level)
-{
-    MOS6522Q800VIA2State *v2s = opaque;
-    MOS6522State *s = MOS6522(v2s);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
-
-    if (level) {
-        s->ifr |= 1 << irq;
-    } else {
-        s->ifr &= ~(1 << irq);
-    }
-
-    mdc->update_irq(s);
-}
-
 
 static void pram_update(MOS6522Q800VIA1State *v1s)
 {
@@ -1061,8 +1029,6 @@ static void mos6522_q800_via1_init(Object *obj)
     qbus_init((BusState *)&v1s->adb_bus, sizeof(v1s->adb_bus),
               TYPE_ADB_BUS, DEVICE(v1s), "adb.0");
 
-    qdev_init_gpio_in(DEVICE(obj), via1_irq_request, VIA1_IRQ_NB);
-
     /* A/UX mode */
     qdev_init_gpio_out(DEVICE(obj), &v1s->auxmode_irq, 1);
 }
@@ -1150,22 +1116,20 @@ static void mos6522_q800_via2_reset(DeviceState *dev)
     ms->a = 0x7f;
 }
 
-static void via2_nubus_irq_request(void *opaque, int irq, int level)
+static void via2_nubus_irq_request(void *opaque, int n, int level)
 {
     MOS6522Q800VIA2State *v2s = opaque;
     MOS6522State *s = MOS6522(v2s);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
+    qemu_irq irq = qdev_get_gpio_in(DEVICE(s), VIA2_IRQ_NUBUS_BIT);
 
     if (level) {
         /* Port A nubus IRQ inputs are active LOW */
-        s->a &= ~(1 << irq);
-        s->ifr |= 1 << VIA2_IRQ_NUBUS_BIT;
+        s->a &= ~(1 << n);
     } else {
-        s->a |= (1 << irq);
-        s->ifr &= ~(1 << VIA2_IRQ_NUBUS_BIT);
+        s->a |= (1 << n);
     }
 
-    mdc->update_irq(s);
+    qemu_set_irq(irq, level);
 }
 
 static void mos6522_q800_via2_init(Object *obj)
@@ -1177,8 +1141,6 @@ static void mos6522_q800_via2_init(Object *obj)
                           "via2", VIA_SIZE);
     sysbus_init_mmio(sbd, &v2s->via_mem);
 
-    qdev_init_gpio_in(DEVICE(obj), via2_irq_request, VIA2_IRQ_NB);
-
     qdev_init_gpio_in_named(DEVICE(obj), via2_nubus_irq_request, "nubus-irq",
                             VIA2_NUBUS_IRQ_NB);
 }
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c
index 233daf1..693fc82 100644
--- a/hw/misc/macio/cuda.c
+++ b/hw/misc/macio/cuda.c
@@ -24,6 +24,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "hw/irq.h"
 #include "hw/ppc/mac.h"
 #include "hw/qdev-properties.h"
 #include "migration/vmstate.h"
@@ -96,9 +97,9 @@ static void cuda_set_sr_int(void *opaque)
     CUDAState *s = opaque;
     MOS6522CUDAState *mcs = &s->mos6522_cuda;
     MOS6522State *ms = MOS6522(mcs);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(ms);
+    qemu_irq irq = qdev_get_gpio_in(DEVICE(ms), SR_INT_BIT);
 
-    mdc->set_sr_int(ms);
+    qemu_set_irq(irq, 1);
 }
 
 static void cuda_delay_set_sr_int(CUDAState *s)
diff --git a/hw/misc/macio/pmu.c b/hw/misc/macio/pmu.c
index 76c608e..b210068 100644
--- a/hw/misc/macio/pmu.c
+++ b/hw/misc/macio/pmu.c
@@ -75,9 +75,9 @@ static void via_set_sr_int(void *opaque)
     PMUState *s = opaque;
     MOS6522PMUState *mps = MOS6522_PMU(&s->mos6522_pmu);
     MOS6522State *ms = MOS6522(mps);
-    MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(ms);
+    qemu_irq irq = qdev_get_gpio_in(DEVICE(ms), SR_INT_BIT);
 
-    mdc->set_sr_int(ms);
+    qemu_set_irq(irq, 1);
 }
 
 static void pmu_update_extirq(PMUState *s)
diff --git a/hw/misc/mos6522.c b/hw/misc/mos6522.c
index 1c57332..6be6853 100644
--- a/hw/misc/mos6522.c
+++ b/hw/misc/mos6522.c
@@ -52,6 +52,19 @@ static void mos6522_update_irq(MOS6522State *s)
     }
 }
 
+static void mos6522_set_irq(void *opaque, int n, int level)
+{
+    MOS6522State *s = MOS6522(opaque);
+
+    if (level) {
+        s->ifr |= 1 << n;
+    } else {
+        s->ifr &= ~(1 << n);
+    }
+
+    mos6522_update_irq(s);
+}
+
 static uint64_t get_counter_value(MOS6522State *s, MOS6522Timer *ti)
 {
     MOS6522DeviceClass *mdc = MOS6522_GET_CLASS(s);
@@ -488,6 +501,8 @@ static void mos6522_init(Object *obj)
 
     s->timers[0].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer1, s);
     s->timers[1].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, mos6522_timer2, s);
+
+    qdev_init_gpio_in(DEVICE(obj), mos6522_set_irq, VIA_NUM_INTS);
 }
 
 static void mos6522_finalize(Object *obj)
diff --git a/include/hw/misc/mac_via.h b/include/hw/misc/mac_via.h
index 0af3463..5fe7a7f 100644
--- a/include/hw/misc/mac_via.h
+++ b/include/hw/misc/mac_via.h
@@ -24,8 +24,6 @@
 #define VIA1_IRQ_ADB_DATA_BIT   CB2_INT_BIT
 #define VIA1_IRQ_ADB_CLOCK_BIT  CB1_INT_BIT
 
-#define VIA1_IRQ_NB             8
-
 #define VIA1_IRQ_ONE_SECOND     BIT(VIA1_IRQ_ONE_SECOND_BIT)
 #define VIA1_IRQ_60HZ           BIT(VIA1_IRQ_60HZ_BIT)
 #define VIA1_IRQ_ADB_READY      BIT(VIA1_IRQ_ADB_READY_BIT)
@@ -42,7 +40,6 @@ struct MOS6522Q800VIA1State {
 
     MemoryRegion via_mem;
 
-    qemu_irq irqs[VIA1_IRQ_NB];
     qemu_irq auxmode_irq;
     uint8_t last_b;
 
@@ -85,8 +82,6 @@ struct MOS6522Q800VIA1State {
 #define VIA2_IRQ_SCSI_BIT       CB2_INT_BIT
 #define VIA2_IRQ_ASC_BIT        CB1_INT_BIT
 
-#define VIA2_IRQ_NB             8
-
 #define VIA2_IRQ_SCSI_DATA      BIT(VIA2_IRQ_SCSI_DATA_BIT)
 #define VIA2_IRQ_NUBUS          BIT(VIA2_IRQ_NUBUS_BIT)
 #define VIA2_IRQ_UNUSED         BIT(VIA2_IRQ_SCSI_BIT)
diff --git a/include/hw/misc/mos6522.h b/include/hw/misc/mos6522.h
index be5c90d..f38ae2b 100644
--- a/include/hw/misc/mos6522.h
+++ b/include/hw/misc/mos6522.h
@@ -57,6 +57,8 @@
 #define T2_INT             BIT(T2_INT_BIT)
 #define T1_INT             BIT(T1_INT_BIT)
 
+#define VIA_NUM_INTS       5
+
 /* Bits in ACR */
 #define T1MODE             0xc0    /* Timer 1 mode */
 #define T1MODE_CONT        0x40    /*  continuous interrupts */