1 files changed, 70 insertions, 0 deletions
diff --git a/ecp5/pio.h b/ecp5/pio.h
new file mode 100644
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+++ b/ecp5/pio.h
@@ -0,0 +1,70 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2018  David Shah <david@symbioticeda.com>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef IO_H
+#define IO_H
+
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+enum class IOVoltage
+{
+    VCC_3V3,
+    VCC_2V5,
+    VCC_1V8,
+    VCC_1V5,
+    VCC_1V35,
+    VCC_1V2
+};
+
+std::string iovoltage_to_str(IOVoltage v);
+IOVoltage iovoltage_from_str(const std::string &name);
+
+enum class IOType
+{
+    TYPE_NONE,
+#define X(t) t,
+#include "iotypes.inc"
+#undef X
+    TYPE_UNKNOWN,
+};
+
+enum class IOSide
+{
+    LEFT,
+    RIGHT,
+    TOP,
+    BOTTOM,
+};
+
+std::string iotype_to_str(IOType type);
+IOType ioType_from_str(const std::string &name);
+
+// IO related functions
+IOVoltage get_vccio(IOType type);
+bool is_strong_vccio_constraint(IOType type, PortType dir, IOSide side);
+bool is_differential(IOType type);
+bool is_referenced(IOType type);
+
+bool valid_loc_for_io(IOType type, PortType dir, IOSide side, int z);
+
+NEXTPNR_NAMESPACE_END
+
+#endif