hardware/mainboard: Set up layers and design rules

Signed-off-by: David Shah <dave@ds0.me>

hardware/ecp5_mainboard/ecp5_mainboard.kicad_pcb

@@ -12,6 +12,12 @@
   (page A4)
   (layers
     (0 F.Cu signal)
+    (1 In1.Cu signal)
+    (2 In2.Cu signal)
+    (3 In3.Cu signal)
+    (4 In4.Cu signal)
+    (5 In5.Cu signal)
+    (6 In6.Cu signal)
     (31 B.Cu signal)
     (32 B.Adhes user)
     (33 F.Adhes user)
@@ -34,17 +40,30 @@
   )
 
   (setup
-    (last_trace_width 0.25)
-    (trace_clearance 0.2)
+    (last_trace_width 0.0889)
+    (user_trace_width 0.1)
+    (user_trace_width 0.15)
+    (user_trace_width 0.2)
+    (user_trace_width 0.25)
+    (user_trace_width 0.35)
+    (user_trace_width 0.5)
+    (user_trace_width 0.8)
+    (user_trace_width 1)
+    (trace_clearance 0.0889)
     (zone_clearance 0.508)
     (zone_45_only no)
-    (trace_min 0.2)
+    (trace_min 0.0889)
     (segment_width 0.2)
     (edge_width 0.15)
-    (via_size 0.8)
-    (via_drill 0.4)
+    (via_size 0.4)
+    (via_drill 0.2)
     (via_min_size 0.4)
-    (via_min_drill 0.3)
+    (via_min_drill 0.2)
+    (user_via 0.6 0.3)
+    (user_via 0.8 0.5)
+    (user_via 1 0.6)
+    (user_via 1.5 1)
+    (user_via 2 1.5)
     (uvia_size 0.3)
     (uvia_drill 0.1)
     (uvias_allowed no)
@@ -811,10 +830,10 @@
   (net 718 "Net-(J2-Pad4)")
 
   (net_class Default "This is the default net class."
-    (clearance 0.2)
-    (trace_width 0.25)
-    (via_dia 0.8)
-    (via_drill 0.4)
+    (clearance 0.0889)
+    (trace_width 0.0889)
+    (via_dia 0.4)
+    (via_drill 0.2)
     (uvia_dia 0.3)
     (uvia_drill 0.1)
     (add_net +12V)