targets/colorlight_5a_75b: add SDRAM.

litex_boards/targets/colorlight_5a_75b.py

@@ -29,13 +29,17 @@ from litex.soc.cores.clock import *
 from litex.soc.integration.soc_core import *
 from litex.soc.integration.builder import *
 
+from litedram.modules import M12L16161A
+from litedram.phy import GENSDRPHY
+
 from liteeth.phy.ecp5rgmii import LiteEthPHYRGMII
 
 # CRG ----------------------------------------------------------------------------------------------
 
 class _CRG(Module):
     def __init__(self, platform, sys_clk_freq):
-        self.clock_domains.cd_sys = ClockDomain()
+        self.clock_domains.cd_sys    = ClockDomain()
+        self.clock_domains.cd_sys_ps = ClockDomain()
 
         # # #
 
@@ -48,9 +52,13 @@ class _CRG(Module):
         self.submodules.pll = pll = ECP5PLL()
 
         pll.register_clkin(clk25, 25e6)
-        pll.create_clkout(self.cd_sys, sys_clk_freq)
+        pll.create_clkout(self.cd_sys,    sys_clk_freq, phase=11)
+        pll.create_clkout(self.cd_sys_ps, sys_clk_freq, phase=20)
         self.specials += AsyncResetSynchronizer(self.cd_sys, ~pll.locked | ~rst_n)
 
+        # SDRAM clock
+        self.comb += platform.request("sdram_clock").eq(self.cd_sys_ps.clk)
+
 # BaseSoC ------------------------------------------------------------------------------------------
 
 class BaseSoC(SoCCore):
@@ -64,6 +72,19 @@ class BaseSoC(SoCCore):
         # CRG --------------------------------------------------------------------------------------
         self.submodules.crg = _CRG(platform, sys_clk_freq)
 
+        # SDR SDRAM --------------------------------------------------------------------------------
+        if not self.integrated_main_ram_size:
+            self.submodules.sdrphy = GENSDRPHY(platform.request("sdram"), cl=2)
+            self.add_sdram("sdram",
+                phy                     = self.sdrphy,
+                module                  = M12L16161A(sys_clk_freq, "1:1"),
+                origin                  = self.mem_map["main_ram"],
+                size                    = kwargs.get("max_sdram_size", 0x40000000),
+                l2_cache_size           = kwargs.get("l2_size", 8192),
+                l2_cache_min_data_width = kwargs.get("min_l2_data_width", 128),
+                l2_cache_reverse        = True
+            )
+
         # Ethernet ---------------------------------------------------------------------------------
         if with_ethernet:
             self.submodules.ethphy = LiteEthPHYRGMII(