rtio: add spartan6 serdes, 4x and 8x

This commit is contained in:
Robert Jördens 2015-07-27 21:01:15 -06:00
parent ae3a52c49c
commit 9ac5bc52d4

View File

@ -0,0 +1,155 @@
from migen.fhdl.std import *
from artiq.gateware.rtio.phy import ttl_serdes_generic
class _OSERDES2_8X(Module):
def __init__(self, pad, stb):
self.o = Signal(8)
self.t_in = Signal()
self.t_out = Signal()
# # #
cascade = Signal(4)
o = self.o
common = dict(p_DATA_RATE_OQ="SDR", p_DATA_RATE_OT="SDR",
p_DATA_WIDTH=8, p_OUTPUT_MODE="SINGLE_ENDED", i_TRAIN=0,
i_CLK0=ClockSignal("rtiox8"), i_CLK1=0,
i_CLKDIV=ClockSignal("rio_phy"),
i_IOCE=stb, i_OCE=1, i_TCE=1, i_RST=0,
i_T4=self.t_in, i_T3=self.t_in,
i_T2=self.t_in, i_T1=self.t_in)
self.specials += [
Instance("OSERDES2", p_SERDES_MODE="MASTER",
i_D4=o[7], i_D3=o[6], i_D2=o[5], i_D1=o[4],
i_SHIFTIN1=1, i_SHIFTIN2=1,
i_SHIFTIN3=cascade[2], i_SHIFTIN4=cascade[3],
o_SHIFTOUT1=cascade[0], o_SHIFTOUT2=cascade[1],
o_OQ=pad, o_TQ=self.t_out, **common),
Instance("OSERDES2", p_SERDES_MODE="SLAVE",
i_D4=o[3], i_D3=o[2], i_D2=o[1], i_D1=o[0],
i_SHIFTIN1=cascade[0], i_SHIFTIN2=cascade[1],
i_SHIFTIN3=1, i_SHIFTIN4=1,
o_SHIFTOUT3=cascade[2], o_SHIFTOUT4=cascade[3],
**common),
]
class _IOSERDES2_8X(Module):
def __init__(self, pad, stb):
self.o = Signal(8)
self.i = Signal(8)
self.oe = Signal()
# # #
pad_i = Signal()
pad_o = Signal()
cascade = Signal()
i = self.i
common = dict(p_BITSLIP_ENABLE="FALSE", p_DATA_RATE="SDR",
p_DATA_WIDTH=8, p_INTERFACE_TYPE="RETIMED",
i_BITSLIP=0, i_CE0=1, i_IOCE=stb,
i_RST=0, i_CLK0=ClockSignal("rtiox8"), i_CLK1=0,
i_CLKDIV=ClockSignal("rio_phy"))
self.specials += [
Instance("ISERDES2", p_SERDES_MODE="MASTER",
o_Q4=i[7], o_Q3=i[6], o_Q2=i[5], o_Q1=i[4],
o_SHIFTOUT=cascade, i_D=pad_i, i_SHIFTIN=0,
**common),
Instance("ISERDES2", p_SERDES_MODE="SLAVE",
o_Q4=i[3], o_Q3=i[2], o_Q2=i[1], o_Q1=i[0],
i_D=0, i_SHIFTIN=cascade, **common),
]
oserdes = _OSERDES2_8X(pad_o, stb)
self.submodules += oserdes
self.specials += Instance("IOBUF",
i_I=pad_o, o_O=pad_i, i_T=oserdes.t_out,
io_IO=pad)
self.comb += [
oserdes.t_in.eq(~self.oe),
oserdes.o.eq(self.o),
]
class Output_8X(ttl_serdes_generic.Output):
def __init__(self, pad, stb):
serdes = _OSERDES2_8X(pad, stb)
self.submodules += serdes
ttl_serdes_generic.Output.__init__(self, serdes)
class Inout_8X(ttl_serdes_generic.Inout):
def __init__(self, pad, stb):
serdes = _IOSERDES2_8X(pad, stb)
self.submodules += serdes
ttl_serdes_generic.Inout.__init__(self, serdes)
class _OSERDES2_4X(Module):
def __init__(self, pad, stb):
self.o = Signal(4)
self.t_in = Signal()
self.t_out = Signal()
# # #
o = self.o
self.specials += Instance("OSERDES2", p_SERDES_MODE="NONE",
p_DATA_RATE_OQ="SDR", p_DATA_RATE_OT="SDR",
p_DATA_WIDTH=4, p_OUTPUT_MODE="SINGLE_ENDED",
i_TRAIN=0, i_CLK0=ClockSignal("rtiox4"),
i_CLK1=0, i_CLKDIV=ClockSignal("rio_phy"),
i_IOCE=stb, i_OCE=1, i_TCE=1,
i_RST=ResetSignal(),
i_T4=self.t_in, i_T3=self.t_in,
i_T2=self.t_in, i_T1=self.t_in,
i_D4=o[3], i_D3=o[2], i_D2=o[1], i_D1=o[0],
o_OQ=pad, o_TQ=self.t_out)
class _IOSERDES2_4X(Module):
def __init__(self, pad, stb):
self.o = Signal(4)
self.i = Signal(4)
self.oe = Signal()
# # #
pad_i = Signal()
pad_o = Signal()
i = self.i
self.specials += Instance("ISERDES2", p_SERDES_MODE="NONE",
p_BITSLIP_ENABLE="FALSE", p_DATA_RATE="SDR",
p_DATA_WIDTH=4, p_INTERFACE_TYPE="RETIMED",
i_BITSLIP=0, i_CE0=1, i_IOCE=stb,
i_RST=0, i_CLK0=ClockSignal("rtiox4"),
i_CLK1=0, i_CLKDIV=ClockSignal("rio_phy"),
o_Q4=i[3], o_Q3=i[2], o_Q2=i[1], o_Q1=i[0],
i_D=pad_i, i_SHIFTIN=0)
oserdes = _OSERDES2_4X(pad_o, stb)
self.submodules += oserdes
self.specials += Instance("IOBUF",
i_I=pad_o, o_O=pad_i, i_T=oserdes.t_out,
io_IO=pad)
self.comb += [
oserdes.t_in.eq(~self.oe),
oserdes.o.eq(self.o),
]
class Output_4X(ttl_serdes_generic.Output):
def __init__(self, pad, stb):
serdes = _OSERDES2_4X(pad, stb)
self.submodules += serdes
ttl_serdes_generic.Output.__init__(self, serdes)
class Inout_4X(ttl_serdes_generic.Inout):
def __init__(self, pad, stb):
serdes = _IOSERDES2_4X(pad, stb)
self.submodules += serdes
ttl_serdes_generic.Inout.__init__(self, serdes)