aspeed/i2c: Add AST2600 support

The I2C controller of the AST2400 and AST2500 SoCs have one IRQ shared
by all I2C busses. The AST2600 SoC I2C controller has one IRQ per bus
and 16 busses.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Message-id: 20190925143248.10000-17-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 48 insertions, 3 deletions

diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index fabdb01..06c119f 100644
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -145,10 +145,12 @@ static inline bool aspeed_i2c_bus_is_enabled(AspeedI2CBus *bus)
 
 static inline void aspeed_i2c_bus_raise_interrupt(AspeedI2CBus *bus)
 {
+    AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
+
     bus->intr_status &= bus->intr_ctrl;
     if (bus->intr_status) {
         bus->controller->intr_status |= 1 << bus->id;
-        qemu_irq_raise(bus->controller->irq);
+        qemu_irq_raise(aic->bus_get_irq(bus));
     }
 }
 
@@ -273,6 +275,7 @@ static void aspeed_i2c_bus_write(void *opaque, hwaddr offset,
                                  uint64_t value, unsigned size)
 {
     AspeedI2CBus *bus = opaque;
+    AspeedI2CClass *aic = ASPEED_I2C_GET_CLASS(bus->controller);
     bool handle_rx;
 
     switch (offset) {
@@ -299,7 +302,7 @@ static void aspeed_i2c_bus_write(void *opaque, hwaddr offset,
         bus->intr_status &= ~(value & 0x7FFF);
         if (!bus->intr_status) {
             bus->controller->intr_status &= ~(1 << bus->id);
-            qemu_irq_lower(bus->controller->irq);
+            qemu_irq_lower(aic->bus_get_irq(bus));
         }
         if (handle_rx && (bus->cmd & (I2CD_M_RX_CMD | I2CD_M_S_RX_CMD_LAST))) {
             aspeed_i2c_handle_rx_cmd(bus);
@@ -457,6 +460,8 @@ static void aspeed_i2c_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < aic->num_busses; i++) {
         char name[32];
         int offset = i < aic->gap ? 1 : 5;
+
+        sysbus_init_irq(sbd, &s->busses[i].irq);
         snprintf(name, sizeof(name), "aspeed.i2c.%d", i);
         s->busses[i].controller = s;
         s->busses[i].id = i;
@@ -488,6 +493,11 @@ static const TypeInfo aspeed_i2c_info = {
     .abstract   = true,
 };
 
+static qemu_irq aspeed_2400_i2c_bus_get_irq(AspeedI2CBus *bus)
+{
+    return bus->controller->irq;
+}
+
 static void aspeed_2400_i2c_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -498,6 +508,7 @@ static void aspeed_2400_i2c_class_init(ObjectClass *klass, void *data)
     aic->num_busses = 14;
     aic->reg_size = 0x40;
     aic->gap = 7;
+    aic->bus_get_irq = aspeed_2400_i2c_bus_get_irq;
 }
 
 static const TypeInfo aspeed_2400_i2c_info = {
@@ -506,6 +517,11 @@ static const TypeInfo aspeed_2400_i2c_info = {
     .class_init = aspeed_2400_i2c_class_init,
 };
 
+static qemu_irq aspeed_2500_i2c_bus_get_irq(AspeedI2CBus *bus)
+{
+    return bus->controller->irq;
+}
+
 static void aspeed_2500_i2c_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -516,6 +532,7 @@ static void aspeed_2500_i2c_class_init(ObjectClass *klass, void *data)
     aic->num_busses = 14;
     aic->reg_size = 0x40;
     aic->gap = 7;
+    aic->bus_get_irq = aspeed_2500_i2c_bus_get_irq;
 }
 
 static const TypeInfo aspeed_2500_i2c_info = {
@@ -524,11 +541,36 @@ static const TypeInfo aspeed_2500_i2c_info = {
     .class_init = aspeed_2500_i2c_class_init,
 };
 
+static qemu_irq aspeed_2600_i2c_bus_get_irq(AspeedI2CBus *bus)
+{
+    return bus->irq;
+}
+
+static void aspeed_2600_i2c_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
+
+    dc->desc = "ASPEED 2600 I2C Controller";
+
+    aic->num_busses = 16;
+    aic->reg_size = 0x80;
+    aic->gap = -1; /* no gap */
+    aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq;
+}
+
+static const TypeInfo aspeed_2600_i2c_info = {
+    .name = TYPE_ASPEED_2600_I2C,
+    .parent = TYPE_ASPEED_I2C,
+    .class_init = aspeed_2600_i2c_class_init,
+};
+
 static void aspeed_i2c_register_types(void)
 {
     type_register_static(&aspeed_i2c_info);
     type_register_static(&aspeed_2400_i2c_info);
     type_register_static(&aspeed_2500_i2c_info);
+    type_register_static(&aspeed_2600_i2c_info);
 }
 
 type_init(aspeed_i2c_register_types)
diff --git a/include/hw/i2c/aspeed_i2c.h b/include/hw/i2c/aspeed_i2c.h
index 6e2dae7..13e0105 100644
--- a/include/hw/i2c/aspeed_i2c.h
+++ b/include/hw/i2c/aspeed_i2c.h
@@ -27,10 +27,11 @@
 #define TYPE_ASPEED_I2C "aspeed.i2c"
 #define TYPE_ASPEED_2400_I2C TYPE_ASPEED_I2C "-ast2400"
 #define TYPE_ASPEED_2500_I2C TYPE_ASPEED_I2C "-ast2500"
+#define TYPE_ASPEED_2600_I2C TYPE_ASPEED_I2C "-ast2600"
 #define ASPEED_I2C(obj) \
     OBJECT_CHECK(AspeedI2CState, (obj), TYPE_ASPEED_I2C)
 
-#define ASPEED_I2C_NR_BUSSES 14
+#define ASPEED_I2C_NR_BUSSES 16
 
 struct AspeedI2CState;
 
@@ -41,6 +42,7 @@ typedef struct AspeedI2CBus {
 
     I2CBus *bus;
     uint8_t id;
+    qemu_irq irq;
 
     uint32_t ctrl;
     uint32_t timing[2];
@@ -72,6 +74,7 @@ typedef struct AspeedI2CClass {
     uint8_t num_busses;
     uint8_t reg_size;
     uint8_t gap;
+    qemu_irq (*bus_get_irq)(AspeedI2CBus *);
 } AspeedI2CClass;
 
 I2CBus *aspeed_i2c_get_bus(DeviceState *dev, int busnr);