litex_m2_baseboard: Add SDCard support.

litex_boards/platforms/litex_m2_baseboard.py

@@ -42,6 +42,25 @@ _io = [
         Subsignal("tx_data", Pins("P1 P2 N1 N2")),
         IOStandard("LVCMOS25")
     ),
+
+    # SDCard
+    ("spisdcard", 0,
+        Subsignal("clk",  Pins("P19")),
+        Subsignal("cs_n", Pins("U19"), Misc("PULLMODE=UP")),
+        Subsignal("mosi", Pins("T20"), Misc("PULLMODE=UP")),
+        Subsignal("miso", Pins("N20"), Misc("PULLMODE=UP")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
+
+    ("sdcard", 0,
+        Subsignal("clk",  Pins("P19")),
+        Subsignal("cd",   Pins("T18"),             Misc("PULLMODE=UP")),
+        Subsignal("cmd",  Pins("T20"),             Misc("PULLMODE=UP")),
+        Subsignal("data", Pins("N20 N19 U20 U19"), Misc("PULLMODE=UP")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
 ]
 
 # Connectors ---------------------------------------------------------------------------------------

litex_boards/targets/litex_m2_baseboard.py

@@ -85,6 +85,9 @@ def main():
     ethopts = parser.add_mutually_exclusive_group()
     ethopts.add_argument("--with-ethernet",  action="store_true", help="Enable Ethernet support")
     ethopts.add_argument("--with-etherbone", action="store_true", help="Enable Etherbone support")
+    sdopts = parser.add_mutually_exclusive_group()
+    sdopts.add_argument("--with-spi-sdcard", action="store_true", help="Enable SPI-mode SDCard support")
+    sdopts.add_argument("--with-sdcard",     action="store_true", help="Enable SDCard support")
     builder_args(parser)
     soc_core_args(parser)
     trellis_args(parser)
@@ -96,6 +99,10 @@ def main():
         with_etherbone = args.with_etherbone,
         **soc_core_argdict(args)
     )
+    if args.with_spi_sdcard:
+        soc.add_spi_sdcard()
+    if args.with_sdcard:
+        soc.add_sdcard()
     builder = Builder(soc, **builder_argdict(args))
     builder.build(**trellis_argdict(args), run=args.build)