build: common: TristateImpl: support longer oe

support setting a different oe for every line in
the Tristates.

this is also needed for the multibit io, where oe has the same lenght
as the io., because some platforms use the generic implementation
of the SDR/DDRTristate, that uses a Tristate internally.

Signed-off-by: Fin Maaß <f.maass@vogl-electronic.com>

litex/build/efinix/common.py

@@ -163,7 +163,7 @@ def __init__(self, io, o, oe, i=None):
             io_data_i = platform.add_iface_io(io_name + "_OUT", len(io))
             self.comb += io_data_i.eq(o)
         io_data_e    = platform.add_iface_io(io_name + "_OE", len(io))
-        self.comb += io_data_e.eq(oe)
+        self.comb += io_data_e.eq(oe if len(oe) == len(io) else Replicate(oe, len(io)))
         if i is not None:
             io_data_o  = platform.add_iface_io(io_name + "_IN", len(io))
             self.comb += i.eq(io_data_o)

litex/build/gowin/common.py

@@ -120,7 +120,7 @@ def __init__(self, io, o, oe, i):
                 io_IO = io[bit] if nbits > 1 else io,
                 o_O   = i[bit]  if nbits > 1 else i,
                 i_I   = o[bit]  if nbits > 1 else o,
-                i_OEN = ~oe,
+                i_OEN = ~oe[bit] if len(oe) == nbits > 1 else ~oe,
             )
 
 class Gw5ATristate:

litex/build/lattice/common.py

@@ -151,7 +151,7 @@ def __init__(self, io, o, oe, i):
                 io_B  = io[bit] if nbits > 1 else io,
                 i_I   = o[bit]  if nbits > 1 else o,
                 o_O   = i[bit]  if nbits > 1 else i,
-                i_T   = ~oe
+                i_T   = ~oe[bit] if len(oe) == nbits > 1 else ~oe
             )
 
 class LatticeECP5Tristate(Module):
@@ -183,7 +183,7 @@ def __init__(self, io, o, oe, i):
                 i_B   = io[bit] if nbits > 1 else io,
                 i_I   = o[bit]  if nbits > 1 else o,
                 o_O   = i[bit]  if nbits > 1 else i,
-                i_T   = ~oe
+                i_T   = ~oe[bit] if len(oe) > 1 else ~oe
             )
 
 class LatticeECP5TrellisTristate(Module):
@@ -400,7 +400,7 @@ def __init__(self, io, o, oe, i):
             self.specials += Instance("SB_IO",
                 p_PIN_TYPE      = C(0b101001, 6), # PIN_OUTPUT_TRISTATE + PIN_INPUT
                 io_PACKAGE_PIN  = io[bit] if nbits > 1 else io,
-                i_OUTPUT_ENABLE = oe,
+                i_OUTPUT_ENABLE = oe[bit] if len(oe) > 1 else oe,
                 i_D_OUT_0       = o[bit]  if nbits > 1 else o,
                 o_D_IN_0        = i[bit]  if nbits > 1 else i,
             )