mirror of
https://github.com/corundum/corundum.git
synced 2025-01-16 08:12:53 +08:00
263 lines
7.9 KiB
Python
263 lines
7.9 KiB
Python
"""
|
|
|
|
Copyright (c) 2015-2016 Alex Forencich
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
of this software and associated documentation files (the "Software"), to deal
|
|
in the Software without restriction, including without limitation the rights
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
copies of the Software, and to permit persons to whom the Software is
|
|
furnished to do so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in
|
|
all copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
THE SOFTWARE.
|
|
|
|
"""
|
|
|
|
from myhdl import *
|
|
|
|
class XGMIIFrame(object):
|
|
def __init__(self, data=b'', error=None, ctrl=None):
|
|
self.data = b''
|
|
self.error = None
|
|
self.ctrl = None
|
|
|
|
if type(data) is XGMIIFrame:
|
|
self.data = data.data
|
|
self.error = data.error
|
|
self.ctrl = data.ctrl
|
|
else:
|
|
self.data = bytearray(data)
|
|
|
|
def build(self):
|
|
if self.data is None:
|
|
return
|
|
|
|
f = list(self.data)
|
|
ctrl = []
|
|
error = []
|
|
d = []
|
|
c = []
|
|
i = 0
|
|
|
|
assert_error = False
|
|
if (type(self.error) is int or type(self.error) is bool) and self.error:
|
|
assert_error = True
|
|
error = [0]*len(self.data)
|
|
error[-1] = 1
|
|
elif self.error is None:
|
|
error = [0]*len(self.data)
|
|
else:
|
|
error = list(self.error)
|
|
|
|
if self.ctrl is None:
|
|
ctrl = [0]*len(self.data)
|
|
else:
|
|
ctrl = list(self.ctrl)
|
|
|
|
assert len(ctrl) == len(f)
|
|
assert len(ctrl) == len(f)
|
|
|
|
for i in range(len(f)):
|
|
if error[i]:
|
|
f[i] = 0xfe
|
|
ctrl[i] = 1
|
|
|
|
i = 0
|
|
while len(f) > 0:
|
|
d.append(f.pop(0))
|
|
c.append(ctrl[i])
|
|
i += 1
|
|
|
|
return d, c
|
|
|
|
def parse(self, d, c):
|
|
if d is None or c is None:
|
|
return
|
|
|
|
self.data = bytearray(d)
|
|
self.ctrl = c
|
|
|
|
self.error = [0]*len(self.data)
|
|
|
|
for i in range(len(self.data)):
|
|
if c[i] and d[i] == 0xfe:
|
|
self.error[i] = 1
|
|
|
|
def __eq__(self, other):
|
|
if type(other) is XGMIIFrame:
|
|
return self.data == other.data
|
|
|
|
def __repr__(self):
|
|
return 'XGMIIFrame(data=%s, error=%s, ctrl=%s)' % (repr(self.data), repr(self.error), repr(self.ctrl))
|
|
|
|
def __iter__(self):
|
|
return self.data.__iter__()
|
|
|
|
|
|
def XGMIISource(clk, rst,
|
|
txd,
|
|
txc,
|
|
fifo=None,
|
|
name=None):
|
|
|
|
@instance
|
|
def logic():
|
|
frame = None
|
|
dl = []
|
|
cl = []
|
|
ifg_cnt = 0
|
|
deficit_idle_cnt = 0
|
|
nt = False
|
|
|
|
while True:
|
|
yield clk.posedge, rst.posedge
|
|
|
|
if rst:
|
|
frame = None
|
|
txd.next = 0x0707070707070707
|
|
txc.next = 0xff
|
|
dl = []
|
|
cl = []
|
|
ifg_cnt = 0
|
|
deficit_idle_cnt = 0
|
|
nt = False
|
|
else:
|
|
if ifg_cnt > 7:
|
|
ifg_cnt -= 8
|
|
txd.next = 0x0707070707070707
|
|
txc.next = 0xff
|
|
elif len(dl) > 0 or nt:
|
|
d = 0
|
|
c = 0
|
|
|
|
for i in range(8):
|
|
if len(dl) > 0:
|
|
d |= dl.pop(0) << (8*i)
|
|
c |= cl.pop(0) << i
|
|
nt = True
|
|
else:
|
|
if nt:
|
|
d |= 0xfd << (8*i)
|
|
nt = False
|
|
ifg_cnt = 12 - (8-i) + deficit_idle_cnt
|
|
else:
|
|
d |= 0x07 << (8*i)
|
|
c |= 1 << i
|
|
|
|
txd.next = d
|
|
txc.next = c
|
|
elif not fifo.empty():
|
|
frame = XGMIIFrame(fifo.get())
|
|
dl, cl = frame.build()
|
|
if name is not None:
|
|
print("[%s] Sending frame %s" % (name, repr(frame)))
|
|
|
|
if ifg_cnt >= 4:
|
|
deficit_idle_cnt = ifg_cnt - 4
|
|
else:
|
|
deficit_idle_cnt = ifg_cnt
|
|
ifg_cnt = 0
|
|
|
|
assert len(dl) > 0
|
|
assert dl.pop(0) == 0x55
|
|
cl.pop(0)
|
|
|
|
k = 1
|
|
d = 0xfb
|
|
c = 1
|
|
|
|
if ifg_cnt > 0:
|
|
k = 5
|
|
d = 0xfb07070707
|
|
c = 0x1f
|
|
|
|
for i in range(k,8):
|
|
if len(dl) > 0:
|
|
d |= dl.pop(0) << (8*i)
|
|
c |= cl.pop(0) << i
|
|
nt = True
|
|
else:
|
|
if nt:
|
|
d |= 0xfd << (8*i)
|
|
nt = False
|
|
else:
|
|
d |= 0x07 << (8*i)
|
|
c |= 1 << i
|
|
|
|
txd.next = d
|
|
txc.next = c
|
|
else:
|
|
ifg_cnt = 0
|
|
deficit_idle_cnt = 0
|
|
txd.next = 0x0707070707070707
|
|
txc.next = 0xff
|
|
|
|
return logic
|
|
|
|
|
|
def XGMIISink(clk, rst,
|
|
rxd,
|
|
rxc,
|
|
fifo=None,
|
|
name=None):
|
|
|
|
@instance
|
|
def logic():
|
|
frame = None
|
|
d = []
|
|
c = []
|
|
|
|
while True:
|
|
yield clk.posedge, rst.posedge
|
|
|
|
if rst:
|
|
frame = None
|
|
d = []
|
|
c = []
|
|
else:
|
|
if frame is None:
|
|
if rxc & 1 and rxd & 0xff == 0xfb:
|
|
# start in lane 0
|
|
frame = XGMIIFrame()
|
|
d = [0x55]
|
|
c = [0]
|
|
for i in range(1,8):
|
|
d.append((int(rxd) >> (8*i)) & 0xff)
|
|
c.append((int(rxc) >> i) & 1)
|
|
elif (rxc >> 4) & 1 and (rxd >> 32) & 0xff == 0xfb:
|
|
# start in lane 4
|
|
frame = XGMIIFrame()
|
|
d = [0x55]
|
|
c = [0]
|
|
for i in range(5,8):
|
|
d.append((int(rxd) >> (8*i)) & 0xff)
|
|
c.append((int(rxc) >> i) & 1)
|
|
else:
|
|
for i in range(8):
|
|
if (rxc >> i) & 1 and (rxd >> (8*i)) & 0xff == 0xfd:
|
|
# terminate
|
|
frame.parse(d, c)
|
|
if fifo is not None:
|
|
fifo.put(frame)
|
|
if name is not None:
|
|
print("[%s] Got frame %s" % (name, repr(frame)))
|
|
frame = None
|
|
d = []
|
|
c = []
|
|
break
|
|
else:
|
|
d.append((int(rxd) >> (8*i)) & 0xff)
|
|
c.append((int(rxc) >> i) & 1)
|
|
|
|
return logic
|
|
|