mistral: Some preps for generating bitstreams

Signed-off-by: gatecat <gatecat@ds0.me>

1 files changed, 86 insertions, 0 deletions

diff --git a/mistral/base_bitstream.cc b/mistral/base_bitstream.cc
new file mode 100644
index 00000000..95199b18
--- /dev/null
+++ b/mistral/base_bitstream.cc
@@ -0,0 +1,86 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2021  gatecat <gatecat@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
+
+namespace {
+// Device-specific default config for the sx120f die
+void default_sx120f(CycloneV *cv)
+{
+    // Default PMA config?
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 11), CycloneV::FFPLL_IQCLK_DIRECTION, 0, CycloneV::TRISTATE);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 11), CycloneV::FFPLL_IQCLK_DIRECTION, 1, CycloneV::TRISTATE);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 23), CycloneV::FFPLL_IQCLK_DIRECTION, 0, CycloneV::DOWN);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 23), CycloneV::FFPLL_IQCLK_DIRECTION, 1, CycloneV::UP);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 35), CycloneV::FFPLL_IQCLK_DIRECTION, 0, CycloneV::UP);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 35), CycloneV::FFPLL_IQCLK_DIRECTION, 1, CycloneV::UP);
+    cv->bmux_b_set(CycloneV::PMA3, CycloneV::xy2pos(0, 35), CycloneV::FPLL_DRV_EN, -1, false);
+    cv->bmux_m_set(CycloneV::PMA3, CycloneV::xy2pos(0, 35), CycloneV::HCLK_TOP_OUT_DRIVER, -1, CycloneV::TRISTATE);
+    // Default PLL config
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_ATB_EN0, -1, true);
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_ATB_EN0_PRECOMP, -1, true);
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_ATB_EN1, -1, true);
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_ATB_EN1_PRECOMP, -1, true);
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_BG_KICKSTART, -1, true);
+    cv->bmux_b_set(CycloneV::FPLL, CycloneV::xy2pos(0, 73), CycloneV::PL_AUX_VBGMON_POWERDOWN, -1, true);
+
+    // Discover these mux values using
+    //   grep 'i [_A-Z0-9.]* 1' empty.bt
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 12), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 13), 4), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 34), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 35), 4), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 37), 31), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 40), 43), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 46), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 47), 53), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 53), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 54), 4), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(0, 73), 68), true);
+
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 18), 66), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 20), 8), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 27), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 28), 43), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 59), 66), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 61), 8), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 68), 69), true);
+    cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(9, 69), 43), true);
+
+    for (int z = 10; z <= 45; z++)
+        cv->inv_set(CycloneV::rnode(CycloneV::GOUT, CycloneV::xy2pos(51, 80), z), true);
+}
+} // namespace
+
+void Arch::init_base_bitstream()
+{
+    switch (cyclonev->current_model()->variant.die.type) {
+    case CycloneV::SX120F:
+        default_sx120f(cyclonev);
+        break;
+    default:
+        log_error("FIXME: die type %s currently unsupported for bitgen.\n",
+                  cyclonev->current_model()->variant.die.name);
+    }
+}
+
+NEXTPNR_NAMESPACE_END
\ No newline at end of file