nexus: Basic support for differential IO types

Signed-off-by: David Shah <dave@ds0.me>

1 files changed, 70 insertions, 0 deletions

diff --git a/nexus/io.cc b/nexus/io.cc
new file mode 100644
index 00000000..fd5e584f
--- /dev/null
+++ b/nexus/io.cc
@@ -0,0 +1,70 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2020  David Shah <dave@ds0.me>
+ *
+ *
+ *  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.
+ *
+ */
+
+#include "log.h"
+#include "nextpnr.h"
+
+NEXTPNR_NAMESPACE_BEGIN
+
+const std::unordered_map<std::string, IOTypeData> Arch::io_types = {
+        {"LVCMOS33", {IOSTYLE_SE_WR, 330}},      {"LVCMOS25", {IOSTYLE_SE_WR, 250}},
+        {"LVCMOS18", {IOSTYLE_SE_WR, 180}},      {"LVCMOS15", {IOSTYLE_SE_WR, 150}},
+        {"LVCMOS12", {IOSTYLE_SE_WR, 120}},      {"LVCMOS10", {IOSTYLE_SE_WR, 120}},
+
+        {"LVCMOS33D", {IOSTYLE_PD_WR, 330}},     {"LVCMOS25D", {IOSTYLE_PD_WR, 250}},
+
+        {"LVCMOS18H", {IOSTYLE_SE_HP, 180}},     {"LVCMOS15H", {IOSTYLE_SE_HP, 150}},
+        {"LVCMOS12H", {IOSTYLE_SE_HP, 120}},     {"LVCMOS10R", {IOSTYLE_SE_HP, 120}},
+        {"LVCMOS10H", {IOSTYLE_SE_HP, 100}},
+
+        {"HSTL15_I", {IOSTYLE_REF_HP, 150}},     {"SSTL15_I", {IOSTYLE_REF_HP, 150}},
+        {"SSTL15_II", {IOSTYLE_REF_HP, 150}},    {"SSTL135_I", {IOSTYLE_REF_HP, 135}},
+        {"SSTL135_II", {IOSTYLE_REF_HP, 135}},   {"HSUL12", {IOSTYLE_REF_HP, 120}},
+
+        {"LVDS", {IOSTYLE_DIFF_HP, 180}},        {"SLVS", {IOSTYLE_DIFF_HP, 120}},
+        {"MIPI_DPHY", {IOSTYLE_DIFF_HP, 120}},   {"HSUL12D", {IOSTYLE_DIFF_HP, 120}},
+
+        {"HSTL15D_I", {IOSTYLE_DIFF_HP, 150}},   {"SSTL15D_I", {IOSTYLE_DIFF_HP, 150}},
+        {"SSTL15D_II", {IOSTYLE_DIFF_HP, 150}},  {"SSTL135D_I", {IOSTYLE_DIFF_HP, 135}},
+        {"SSTL135D_II", {IOSTYLE_DIFF_HP, 135}}, {"HSUL12D", {IOSTYLE_DIFF_HP, 120}},
+};
+
+int Arch::get_io_type_vcc(const std::string &io_type) const
+{
+    if (!io_types.count(io_type))
+        log_error("IO type '%s' not supported.\n", io_type.c_str());
+    return io_types.at(io_type).vcco;
+}
+
+bool Arch::is_io_type_diff(const std::string &io_type) const
+{
+    if (!io_types.count(io_type))
+        log_error("IO type '%s' not supported.\n", io_type.c_str());
+    return io_types.at(io_type).style & IOMODE_DIFF;
+}
+
+bool Arch::is_io_type_ref(const std::string &io_type) const
+{
+    if (!io_types.count(io_type))
+        log_error("IO type '%s' not supported.\n", io_type.c_str());
+    return io_types.at(io_type).style & IOMODE_REF;
+}
+
+NEXTPNR_NAMESPACE_END