gsd_butterstick: Add SDCard (SPI & SD modes) support.

litex_boards/platforms/gsd_butterstick.py

@@ -37,6 +37,25 @@ _io_r1_0 = [
         IOStandard("LVCMOS33")
     ),
 
+
+    # SDCard
+    ("spisdcard", 0,
+        Subsignal("clk",  Pins(f"B15")),
+        Subsignal("mosi", Pins(f"A13"), Misc("PULLMODE=UP")),
+        Subsignal("cs_n", Pins(f"A14"), Misc("PULLMODE=UP")),
+        Subsignal("miso", Pins(f"C12"), Misc("PULLMODE=UP")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
+    ("sdcard", 0,
+        Subsignal("data", Pins("C12 A12 D14 A14"), Misc("PULLMODE=UP")),
+        Subsignal("cmd",  Pins("A13"), Misc("PULLMODE=UP")),
+        Subsignal("clk",  Pins("B13")),
+        Subsignal("cd",   Pins("B15")),
+        Misc("SLEWRATE=FAST"),
+        IOStandard("LVCMOS33"),
+    ),
+
     # DDR3 SDRAM
     ("ddram", 0,
         Subsignal("a", Pins(

litex_boards/targets/gsd_butterstick.py

@@ -8,7 +8,7 @@
 # SPDX-License-Identifier: BSD-2-Clause
 
 # Build/Use:
-# ./gsd_butterstick.py --uart-name=crossover --with-etherbone --with-spi-flash --csr-csv=csr.csv --build --load
+# ./gsd_butterstick.py --uart-name=crossover --with-etherbone --csr-csv=csr.csv --build --load
 # litex_server --udp
 # litex_term bridge
 
@@ -159,6 +159,9 @@ def main():
     parser.add_argument("--eth-ip",          default="192.168.1.50", help="Ethernet/Etherbone IP address")
     parser.add_argument("--eth-dynamic-ip",  action="store_true",    help="Enable dynamic Ethernet IP addresses setting")
     parser.add_argument("--with-spi-flash",  action="store_true",    help="Enable SPI Flash (MMAPed)")
+    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)
@@ -177,6 +180,10 @@ def main():
         eth_dynamic_ip = args.eth_dynamic_ip,
         with_spi_flash = args.with_spi_flash,
         **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_kargs = trellis_argdict(args) if args.toolchain == "trellis" else {}
     builder.build(**builder_kargs, run=args.build)