milkymist/s6ddrphy/__init__.py

   1 from migen.fhdl.structure import *
   2 from migen.bus import dfi
   3
   4 class S6DDRPHY:
   5         def __init__(self, a, ba, d):
   6                 ins = []
   7                 outs = []
   8                 inouts = []
   9
  10                 for name, width, l in [
  11                         ("clk2x_270", 1, ins),
  12                         ("clk4x_wr", 1, ins),
  13                         ("clk4x_wr_strb", 1, ins),
  14                         ("clk4x_rd", 1, ins),
  15                         ("clk4x_rd_strb", 1, ins),
  16
  17                         ("sd_clk_out_p", 1, outs),
  18                         ("sd_clk_out_n", 1, outs),
  19                         ("sd_a", a, outs),
  20                         ("sd_ba", ba, outs),
  21                         ("sd_cs_n", 1, outs),
  22                         ("sd_cke", 1, outs),
  23                         ("sd_ras_n", 1, outs),
  24                         ("sd_cas_n", 1, outs),
  25                         ("sd_we_n", 1, outs),
  26                         ("sd_dq", d//2, inouts),
  27                         ("sd_dm", d//16, outs),
  28                         ("sd_dqs", d//16, inouts)
  29
  30                 ]:
  31                         s = Signal(BV(width), name=name)
  32                         setattr(self, name, s)
  33                         l.append((name, s))
  34
  35                 self.dfi = dfi.Interface(a, ba, d, 2)
  36                 ins += self.dfi.get_standard_names(True, False)
  37                 outs += self.dfi.get_standard_names(False, True)
  38
  39                 self._inst = Instance("s6ddrphy",
  40                         outs,
  41                         ins,
  42                         inouts,
  43                         [
  44                                 ("NUM_AD", a),
  45                                 ("NUM_BA", ba),
  46                                 ("NUM_D", d)
  47                         ],
  48                         clkport="sys_clk")
  49
  50         def get_fragment(self):
  51                 return Fragment(instances=[self._inst])