litex/liteeth/mac/__init__.py

54 lines
1.9 KiB
Python

from liteeth.common import *
from liteeth.generic.depacketizer import LiteEthDepacketizer
from liteeth.generic.packetizer import LiteEthPacketizer
from liteeth.mac.core import LiteEthMACCore
from liteeth.mac.frontend.wishbone import LiteEthMACWishboneInterface
from liteeth.mac.frontend.crossbar import LiteEthMACCrossbar
class LiteEthMACDepacketizer(LiteEthDepacketizer):
def __init__(self):
LiteEthDepacketizer.__init__(self,
eth_phy_description(8),
eth_mac_description(8),
mac_header,
mac_header_len)
class LiteEthMACPacketizer(LiteEthPacketizer):
def __init__(self):
LiteEthPacketizer.__init__(self,
eth_mac_description(8),
eth_phy_description(8),
mac_header,
mac_header_len)
class LiteEthMAC(Module, AutoCSR):
def __init__(self, phy, dw, interface="crossbar", endianness="be",
with_hw_preamble_crc=True):
self.submodules.core = LiteEthMACCore(phy, dw, endianness, with_hw_preamble_crc)
self.csrs = []
if interface == "crossbar":
self.submodules.crossbar = LiteEthMACCrossbar()
self.submodules.packetizer = LiteEthMACPacketizer()
self.submodules.depacketizer = LiteEthMACDepacketizer()
self.comb += [
Record.connect(self.crossbar.master.source, self.packetizer.sink),
Record.connect(self.packetizer.source, self.core.sink),
Record.connect(self.core.source, self.depacketizer.sink),
Record.connect(self.depacketizer.source, self.crossbar.master.sink)
]
elif interface == "wishbone":
self.submodules.interface = LiteEthMACWishboneInterface(dw, 2, 2)
self.comb += [
Record.connect(self.interface.source, self.core.sink),
Record.connect(self.core.source, self.interface.sink)
]
self.ev, self.bus = self.interface.sram.ev, self.interface.bus
self.csrs = self.interface.get_csrs()
elif interface == "dma":
raise NotImplementedError
else:
raise ValueError(interface + " not supported by LiteEthMac!")
def get_csrs(self):
return self.csrs