aspeed/timer: Introduce an object class per SoC

The most important changes will be on the register range 0x34 - 0x3C
memops. Introduce class read/write operations to handle the
differences between SoCs.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20190925143248.10000-5-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 96 insertions, 11 deletions

diff --git a/hw/timer/aspeed_timer.c b/hw/timer/aspeed_timer.c
index 2bda826..c78bc1b 100644
--- a/hw/timer/aspeed_timer.c
+++ b/hw/timer/aspeed_timer.c
@@ -253,13 +253,8 @@ static uint64_t aspeed_timer_read(void *opaque, hwaddr offset, unsigned size)
     case 0x40 ... 0x8c: /* Timers 5 - 8 */
         value = aspeed_timer_get_value(&s->timers[(offset >> 4) - 1], reg);
         break;
-    /* Illegal */
-    case 0x38:
-    case 0x3C:
     default:
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
-                __func__, offset);
-        value = 0;
+        value = ASPEED_TIMER_GET_CLASS(s)->read(s, offset);
         break;
     }
     trace_aspeed_timer_read(offset, size, value);
@@ -453,12 +448,8 @@ static void aspeed_timer_write(void *opaque, hwaddr offset, uint64_t value,
     case 0x40 ... 0x8c:
         aspeed_timer_set_value(s, (offset >> TIMER_NR_REGS) - 1, reg, tv);
         break;
-    /* Illegal */
-    case 0x38:
-    case 0x3C:
     default:
-        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
-                __func__, offset);
+        ASPEED_TIMER_GET_CLASS(s)->write(s, offset, value);
         break;
     }
 }
@@ -472,6 +463,64 @@ static const MemoryRegionOps aspeed_timer_ops = {
     .valid.unaligned = false,
 };
 
+static uint64_t aspeed_2400_timer_read(AspeedTimerCtrlState *s, hwaddr offset)
+{
+    uint64_t value;
+
+    switch (offset) {
+    case 0x38:
+    case 0x3C:
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
+                __func__, offset);
+        value = 0;
+        break;
+    }
+    return value;
+}
+
+static void aspeed_2400_timer_write(AspeedTimerCtrlState *s, hwaddr offset,
+                                    uint64_t value)
+{
+    switch (offset) {
+    case 0x38:
+    case 0x3C:
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
+                __func__, offset);
+        break;
+    }
+}
+
+static uint64_t aspeed_2500_timer_read(AspeedTimerCtrlState *s, hwaddr offset)
+{
+    uint64_t value;
+
+    switch (offset) {
+    case 0x38:
+    case 0x3C:
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
+                __func__, offset);
+        value = 0;
+        break;
+    }
+    return value;
+}
+
+static void aspeed_2500_timer_write(AspeedTimerCtrlState *s, hwaddr offset,
+                                    uint64_t value)
+{
+    switch (offset) {
+    case 0x38:
+    case 0x3C:
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
+                __func__, offset);
+        break;
+    }
+}
+
 static void aspeed_init_one_timer(AspeedTimerCtrlState *s, uint8_t id)
 {
     AspeedTimer *t = &s->timers[id];
@@ -570,11 +619,47 @@ static const TypeInfo aspeed_timer_info = {
     .parent = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(AspeedTimerCtrlState),
     .class_init = timer_class_init,
+    .class_size = sizeof(AspeedTimerClass),
+    .abstract   = true,
+};
+
+static void aspeed_2400_timer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
+
+    dc->desc = "ASPEED 2400 Timer";
+    awc->read = aspeed_2400_timer_read;
+    awc->write = aspeed_2400_timer_write;
+}
+
+static const TypeInfo aspeed_2400_timer_info = {
+    .name = TYPE_ASPEED_2400_TIMER,
+    .parent = TYPE_ASPEED_TIMER,
+    .class_init = aspeed_2400_timer_class_init,
+};
+
+static void aspeed_2500_timer_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedTimerClass *awc = ASPEED_TIMER_CLASS(klass);
+
+    dc->desc = "ASPEED 2500 Timer";
+    awc->read = aspeed_2500_timer_read;
+    awc->write = aspeed_2500_timer_write;
+}
+
+static const TypeInfo aspeed_2500_timer_info = {
+    .name = TYPE_ASPEED_2500_TIMER,
+    .parent = TYPE_ASPEED_TIMER,
+    .class_init = aspeed_2500_timer_class_init,
 };
 
 static void aspeed_timer_register_types(void)
 {
     type_register_static(&aspeed_timer_info);
+    type_register_static(&aspeed_2400_timer_info);
+    type_register_static(&aspeed_2500_timer_info);
 }
 
 type_init(aspeed_timer_register_types)