Introduce a new ast2700 class to support AST2700.
The I2C bus register memory regions and
I2C bus pool buffer memory regions are discontinuous
and they do not back compatible AST2600.

Add a new ast2700 i2c class init function to match the
address of I2C bus register and pool buffer from the datasheet.

An I2C controller registers owns 8KB address space.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
---
 hw/i2c/aspeed_i2c.c         | 62 +++++++++++++++++++++++++++++++++++++
 include/hw/i2c/aspeed_i2c.h |  1 +
 2 files changed, 63 insertions(+)

diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c
index 2dea3a42a0..819a875839 100644
--- a/hw/i2c/aspeed_i2c.c
+++ b/hw/i2c/aspeed_i2c.c
@@ -1102,6 +1102,41 @@ static void aspeed_i2c_instance_init(Object *obj)
  *   0xDA0 ... 0xDBF: Device 14 buffer
  *   0xDC0 ... 0xDDF: Device 15 buffer (15 and 16 unused in AST1030)
  *   0xDE0 ... 0xDFF: Device 16 buffer
+ *
+ * Address Definitions (AST2700)
+ *   0x000 ... 0x0FF: Global Register
+ *   0x100 ... 0x17F: Device 0
+ *   0x1A0 ... 0x1BF: Device 0 buffer
+ *   0x200 ... 0x27F: Device 1
+ *   0x2A0 ... 0x2BF: Device 1 buffer
+ *   0x300 ... 0x37F: Device 2
+ *   0x3A0 ... 0x3BF: Device 2 buffer
+ *   0x400 ... 0x47F: Device 3
+ *   0x4A0 ... 0x4BF: Device 3 buffer
+ *   0x500 ... 0x57F: Device 4
+ *   0x5A0 ... 0x5BF: Device 4 buffer
+ *   0x600 ... 0x67F: Device 5
+ *   0x6A0 ... 0x6BF: Device 5 buffer
+ *   0x700 ... 0x77F: Device 6
+ *   0x7A0 ... 0x7BF: Device 6 buffer
+ *   0x800 ... 0x87F: Device 7
+ *   0x8A0 ... 0x8BF: Device 7 buffer
+ *   0x900 ... 0x97F: Device 8
+ *   0x9A0 ... 0x9BF: Device 8 buffer
+ *   0xA00 ... 0xA7F: Device 9
+ *   0xAA0 ... 0xABF: Device 9 buffer
+ *   0xB00 ... 0xB7F: Device 10
+ *   0xBA0 ... 0xBBF: Device 10 buffer
+ *   0xC00 ... 0xC7F: Device 11
+ *   0xCA0 ... 0xCBF: Device 11 buffer
+ *   0xD00 ... 0xD7F: Device 12
+ *   0xDA0 ... 0xDBF: Device 12 buffer
+ *   0xE00 ... 0xE7F: Device 13
+ *   0xEA0 ... 0xEBF: Device 13 buffer
+ *   0xF00 ... 0xF7F: Device 14
+ *   0xFA0 ... 0xFBF: Device 14 buffer
+ *   0x1000 ... 0x107F: Device 15
+ *   0x10A0 ... 0x10BF: Device 15 buffer
  */
 static void aspeed_i2c_realize(DeviceState *dev, Error **errp)
 {
@@ -1501,6 +1536,32 @@ static const TypeInfo aspeed_1030_i2c_info = {
     .class_init = aspeed_1030_i2c_class_init,
 };
 
+static void aspeed_2700_i2c_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    AspeedI2CClass *aic = ASPEED_I2C_CLASS(klass);
+
+    dc->desc = "ASPEED 2700 I2C Controller";
+
+    aic->num_busses = 16;
+    aic->reg_size = 0x80;
+    aic->reg_gap_size = 0x80;
+    aic->gap = -1; /* no gap */
+    aic->bus_get_irq = aspeed_2600_i2c_bus_get_irq;
+    aic->pool_size = 0x20;
+    aic->pool_gap_size = 0xe0;
+    aic->pool_base = 0x1a0;
+    aic->bus_pool_base = aspeed_2500_i2c_bus_pool_base;
+    aic->has_dma = true;
+    aic->mem_size = 0x2000;
+}
+
+static const TypeInfo aspeed_2700_i2c_info = {
+    .name = TYPE_ASPEED_2700_I2C,
+    .parent = TYPE_ASPEED_I2C,
+    .class_init = aspeed_2700_i2c_class_init,
+};
+
 static void aspeed_i2c_register_types(void)
 {
     type_register_static(&aspeed_i2c_bus_info);
@@ -1510,6 +1571,7 @@ static void aspeed_i2c_register_types(void)
     type_register_static(&aspeed_2500_i2c_info);
     type_register_static(&aspeed_2600_i2c_info);
     type_register_static(&aspeed_1030_i2c_info);
+    type_register_static(&aspeed_2700_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 bdaea3207d..4f23dc10c3 100644
--- a/include/hw/i2c/aspeed_i2c.h
+++ b/include/hw/i2c/aspeed_i2c.h
@@ -31,6 +31,7 @@
 #define TYPE_ASPEED_2500_I2C TYPE_ASPEED_I2C "-ast2500"
 #define TYPE_ASPEED_2600_I2C TYPE_ASPEED_I2C "-ast2600"
 #define TYPE_ASPEED_1030_I2C TYPE_ASPEED_I2C "-ast1030"
+#define TYPE_ASPEED_2700_I2C TYPE_ASPEED_I2C "-ast2700"
 OBJECT_DECLARE_TYPE(AspeedI2CState, AspeedI2CClass, ASPEED_I2C)
 
 #define ASPEED_I2C_NR_BUSSES 16
-- 
2.34.1