Put sources and sinks to sleep based on clock enables

Signed-off-by: Alex Forencich <alex@alexforencich.com>

cocotbext/eth/gmii.py

@@ -266,6 +266,10 @@ class GmiiSource(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -330,6 +334,9 @@ class GmiiSource(Reset):
                     self.active = False
                     self.idle_event.set()
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class GmiiSink(Reset):
 
@@ -432,6 +439,10 @@ class GmiiSink(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -492,6 +503,9 @@ class GmiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class GmiiPhy:
     def __init__(self, txd, tx_er, tx_en, tx_clk, gtx_clk, rxd, rx_er, rx_dv, rx_clk,

cocotbext/eth/mii.py

@@ -167,6 +167,10 @@ class MiiSource(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -224,6 +228,9 @@ class MiiSource(Reset):
                     self.active = False
                     self.idle_event.set()
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class MiiSink(Reset):
 
@@ -323,6 +330,10 @@ class MiiSink(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -378,6 +389,9 @@ class MiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class MiiPhy:
     def __init__(self, txd, tx_er, tx_en, tx_clk, rxd, rx_er, rx_dv, rx_clk, reset=None,

cocotbext/eth/rgmii.py

@@ -169,7 +169,17 @@ class RgmiiSource(Reset):
         clock_rising_edge_event = RisingEdge(self.clock)
         clock_falling_edge_event = FallingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
+            await clock_falling_edge_event
+
+            # send low nibble after falling edge, leading in to rising edge
+            self.data.value = d & 0x0F
+            self.ctrl.value = en
+
             await clock_rising_edge_event
 
             # send high nibble after rising edge, leading in to falling edge
@@ -235,11 +245,8 @@ class RgmiiSource(Reset):
                     self.active = False
                     self.idle_event.set()
 
-                await clock_falling_edge_event
+            elif self.enable is not None and not self.enable.value:
-
+                await enable_event
-                # send low nibble after falling edge, leading in to rising edge
-                self.data.value = d & 0x0F
-                self.ctrl.value = en
 
 
 class RgmiiSink(Reset):
@@ -345,6 +352,10 @@ class RgmiiSink(Reset):
         clock_rising_edge_event = RisingEdge(self.clock)
         clock_falling_edge_event = FallingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_rising_edge_event
 
@@ -412,6 +423,9 @@ class RgmiiSink(Reset):
                     frame.data.append(d_val)
                     frame.error.append(er_val)
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class RgmiiPhy:
     def __init__(self, txd, tx_ctl, tx_clk, rxd, rx_ctl, rx_clk, reset=None,

cocotbext/eth/xgmii.py

@@ -274,6 +274,10 @@ class XgmiiSource(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -361,6 +365,9 @@ class XgmiiSource(Reset):
                     self.active = False
                     self.idle_event.set()
 
+            elif self.enable is not None and not self.enable.value:
+                await enable_event
+
 
 class XgmiiSink(Reset):
 
@@ -460,6 +467,10 @@ class XgmiiSink(Reset):
 
         clock_edge_event = RisingEdge(self.clock)
 
+        enable_event = None
+        if self.enable is not None:
+            enable_event = RisingEdge(self.enable)
+
         while True:
             await clock_edge_event
 
@@ -499,3 +510,6 @@ class XgmiiSink(Reset):
 
                             frame.data.append(d_val)
                             frame.ctrl.append(c_val)
+
+            elif self.enable is not None and not self.enable.value:
+                await enable_event