ice40: Add support for SB_I2C and SB_SPI

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/ice40/arch.cc b/ice40/arch.cc
index b0839fa5..bfcadc0b 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -1053,6 +1053,16 @@ TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, in
         if (port == id_CLK || port == id_CLOCK)
             return TMG_CLOCK_INPUT;
         return TMG_IGNORE;
+    } else if (cell->type == id_SB_I2C || cell->type == id_SB_SPI) {
+        if (port == this->id("SBCLKI"))
+            return TMG_CLOCK_INPUT;
+
+        clockInfoCount = 1;
+
+        if (cell->ports.at(port).type == PORT_OUT)
+            return TMG_REGISTER_OUTPUT;
+        else
+            return TMG_REGISTER_INPUT;
     }
     log_error("cell type '%s' is unsupported (instantiated as '%s')\n", cell->type.c_str(this), cell->name.c_str(this));
 }
@@ -1144,6 +1154,17 @@ TimingClockingInfo Arch::getPortClockingInfo(const CellInfo *cell, IdString port
             info.setup.delay = 100;
             info.hold.delay = 0;
         }
+    } else if (cell->type == id_SB_I2C || cell->type == id_SB_SPI) {
+        info.clock_port = this->id("SBCLKI");
+        info.edge = RISING_EDGE;
+        if (cell->ports.at(port).type == PORT_OUT) {
+            /* Dummy number */
+            info.clockToQ.delay = 1500;
+        } else {
+            /* Dummy number */
+            info.setup.delay = 1500;
+            info.hold.delay = 0;
+        }
     } else {
         NPNR_ASSERT_FALSE("unhandled cell type in getPortClockingInfo");
     }