liteeth/mac/__init__.py

   1 from liteeth.common import *
   2 from liteeth.mac.common import *
   3 from liteeth.mac.core import LiteEthMACCore
   4 from liteeth.mac.frontend.wishbone import LiteEthMACWishboneInterface
   5
   6 class LiteEthMAC(Module, AutoCSR):
   7         def __init__(self, phy, dw, interface="crossbar", endianness="big",
   8                         with_hw_preamble_crc=True):
   9                 self.submodules.core = LiteEthMACCore(phy, dw, endianness, with_hw_preamble_crc)
  10                 self.csrs = []
  11                 if interface == "crossbar":
  12                         self.submodules.crossbar = LiteEthMACCrossbar()
  13                         self.submodules.packetizer = LiteEthMACPacketizer()
  14                         self.submodules.depacketizer = LiteEthMACDepacketizer()
  15                         self.comb += [
  16                                 Record.connect(self.crossbar.master.source, self.packetizer.sink),
  17                                 Record.connect(self.packetizer.source, self.core.sink),
  18                                 Record.connect(self.core.source, self.depacketizer.sink),
  19                                 Record.connect(self.depacketizer.source, self.crossbar.master.sink)
  20                         ]
  21                 elif interface == "wishbone":
  22                         self.submodules.interface = LiteEthMACWishboneInterface(dw, 2, 2)
  23                         self.comb += [
  24                                 Record.connect(self.interface.source, self.core.sink),
  25                                 Record.connect(self.core.source, self.interface.sink)
  26                         ]
  27                         self.ev, self.bus = self.interface.sram.ev, self.interface.bus
  28                         self.csrs = self.interface.get_csrs()
  29                 elif interface == "dma":
  30                         raise NotImplementedError
  31                 else:
  32                         raise ValueError(interface + " not supported by LiteEthMac!")
  33
  34         def get_csrs(self):
  35                 return self.csrs