core: add LiteDRAMCore (ControllerInjector from LiteX)

litedram/core/__init__.py

@@ -1,2 +1,29 @@
+from migen import *
+
+from litex.soc.interconnect.csr import AutoCSR
+
+from litedram.dfii import DFIInjector
 from litedram.core.controller import ControllerSettings, LiteDRAMController
-from litedram.core.crossbar import LiteDRAMCrossbar
+from litedram.core.crossbar import LiteDRAMCrossbar
+
+# Core ---------------------------------------------------------------------------------------------
+
+class LiteDRAMCore(Module, AutoCSR):
+    def __init__(self, phy, geom_settings, timing_settings, clk_freq, **kwargs):
+        self.submodules.dfii = DFIInjector(
+            addressbits = geom_settings.addressbits,
+            bankbits    = geom_settings.bankbits,
+            nranks      = phy.settings.nranks,
+            databits    = phy.settings.dfi_databits,
+            nphases     = phy.settings.nphases)
+        self.comb += self.dfii.master.connect(phy.dfi)
+
+        self.submodules.controller = controller = LiteDRAMController(
+            phy_settings    = phy.settings,
+            geom_settings   = geom_settings,
+            timing_settings = timing_settings,
+            clk_freq        = clk_freq,
+            **kwargs)
+        self.comb += controller.dfi.connect(self.dfii.slave)
+
+        self.submodules.crossbar = LiteDRAMCrossbar(controller.interface)