dfi: split phase description

m-labs · Jul 10, 2013 · f5ddd33 · f5ddd33
1 parent 1d33c61
commit f5ddd33
Showing 1 changed file with 16 additions and 4 deletions.
diff --git a/migen/bus/dfi.py b/migen/bus/dfi.py
@@ -1,25 +1,37 @@
 from migen.fhdl.std import *
 from migen.genlib.record import *
 
-def phase_description(a, ba, d):
+def phase_cmd_description(a, ba):
 	return [
 		("address",			a,		DIR_M_TO_S),	
 		("bank",			ba,		DIR_M_TO_S),
 		("cas_n",			1,		DIR_M_TO_S),
 		("cke",				1,		DIR_M_TO_S),
 		("cs_n",			1,		DIR_M_TO_S),
 		("ras_n",			1,		DIR_M_TO_S),
-		("we_n",			1,		DIR_M_TO_S),
-
+		("we_n",			1,		DIR_M_TO_S)
+	]
+
+def phase_wrdata_description(d):
+	return [
 		("wrdata",			d,		DIR_M_TO_S),
 		("wrdata_en",		1,		DIR_M_TO_S),
 		("wrdata_mask",		d//8,	DIR_M_TO_S),
-
+	]
+
+def phase_rddata_description(d):
+	return [
 		("rddata_en",		1,		DIR_M_TO_S),
 		("rddata",			d,		DIR_S_TO_M),
 		("rddata_valid",	1,		DIR_S_TO_M)
 	]
 
+def phase_description(a, ba, d):
+	r = phase_cmd_description(a, ba)
+	r += phase_wrdata_description(d)
+	r += phase_rddata_description(d)
+	return r
+
 class Interface(Record):
 	def __init__(self, a, ba, d, nphases=1):
 		layout = [("p"+str(i), phase_description(a, ba, d)) for i in range(nphases)]