Merge pull request #3936 from dnltz/WIP/dnltz/update-io-handling

ihp-sg13g2: Generic pad.tcl script

Author: maliberty

flow/designs/ihp-sg13g2/i2c-gpio-expander/I2cGpioExpanderTop.v

@@ -162,6 +162,14 @@ module I2cGpioExpanderTop (
     .p2c    (sg13g2_IOPad_io_gpio_7_p2c   ), //o
     .pad    (io_gpio_7_PAD                )  //~
   );
+  (* keep *) sg13g2_IOPadVdd sg13g2_IOPadVdd_inst (
+  );
+  (* keep *) sg13g2_IOPadVss sg13g2_IOPadVss_inst (
+  );
+  (* keep *) sg13g2_IOPadIOVss sg13g2_IOPadIOVss_inst (
+  );
+  (* keep *) sg13g2_IOPadIOVdd sg13g2_IOPadIOVdd_inst (
+  );
   assign clock = sg13g2_IOPad_io_clock_p2c;
   assign reset = sg13g2_IOPad_io_reset_p2c;
   always @(*) begin

flow/designs/ihp-sg13g2/i2c-gpio-expander/config.mk

@@ -18,7 +18,28 @@ export PLACE_DENSITY = 0.75
 export MACRO_PLACE_HALO = 20 20
 export CORNERS = slow fast
 
-export FOOTPRINT_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/pad.tcl
+export IO_NORTH_PINS = sg13g2_IOPad_io_gpio_3 \
+sg13g2_IOPad_io_gpio_4 \
+sg13g2_IOPad_io_gpio_5 \
+sg13g2_IOPad_io_gpio_6 \
+sg13g2_IOPad_io_gpio_7
+export IO_EAST_PINS = sg13g2_IOPadVdd_inst \
+sg13g2_IOPadVss_inst \
+sg13g2_IOPad_io_address_0 \
+sg13g2_IOPad_io_address_1 \
+sg13g2_IOPad_io_address_2
+export IO_SOUTH_PINS = sg13g2_IOPad_io_clock \
+sg13g2_IOPad_io_reset \
+sg13g2_IOPad_io_i2c_scl \
+sg13g2_IOPad_io_i2c_sda \
+sg13g2_IOPad_io_i2c_interrupt
+export IO_WEST_PINS = sg13g2_IOPad_io_gpio_0 \
+sg13g2_IOPad_io_gpio_1 \
+sg13g2_IOPad_io_gpio_2 \
+sg13g2_IOPadIOVss_inst \
+sg13g2_IOPadIOVdd_inst
+export FOOTPRINT_TCL = $(PLATFORM_DIR)/pad.tcl
+
 export PDN_TCL = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/pdn.tcl
 
 export BLOCKS = I2cDeviceCtrl

flow/designs/ihp-sg13g2/i2c-gpio-expander/pad.tcl

@@ -1,6 +1,6 @@
 {
     "synth__design__instance__area__stdcell": {
-        "value": 286097.29,
+        "value": 311335.1878,
         "compare": "<="
     },
     "constraints__clocks__count": {

flow/designs/ihp-sg13g2/i2c-gpio-expander/rules-base.json

@@ -101,6 +101,28 @@ export TAPCELL_TCL ?= $(PLATFORM_DIR)/tapcell.tcl
 
 export MACRO_PLACE_HALO ?= 40 40
 
+# Will be placed left to right
+export IO_NORTH_PINS ??=
+export IO_SOUTH_PINS ??=
+# Will be placed bottom to top
+export IO_EAST_PINS ??=
+export IO_WEST_PINS ??=
+
+# Variables for bondpad
+export IO_BONDPAD_SIZE ?= 70
+export IO_BONDPAD_NAME ?= bondpad_70x70
+# Variables for padframe
+export IO_LENGTH ?= 180
+export IO_WIDTH ?= 80
+export IO_SEALRING_OFFSET ?= 70
+export IO_FILLER_CELLS ?= \
+sg13g2_Filler10000 \
+sg13g2_Filler4000 \
+sg13g2_Filler2000 \
+sg13g2_Filler1000 \
+sg13g2_Filler400 \
+sg13g2_Filler200
+
 #---------------------------------------------------------
 # Place
 # --------------------------------------------------------

flow/platforms/ihp-sg13g2/config.mk

@@ -0,0 +1,41 @@
+set IO_OFFSET [expr { $::env(IO_BONDPAD_SIZE) + $::env(IO_SEALRING_OFFSET) }]
+
+# padframe core power pins
+add_global_connection -net {VDD} -pin_pattern {^vdd$} -power
+add_global_connection -net {VSS} -pin_pattern {^vss$} -ground
+
+# padframe io power pins
+add_global_connection -net {IOVDD} -pin_pattern {^iovdd$} -power
+add_global_connection -net {IOVSS} -pin_pattern {^iovss$} -ground
+
+make_fake_io_site -name IOLibSite -width 1 -height $::env(IO_LENGTH)
+make_fake_io_site -name IOLibCSite -width $::env(IO_LENGTH) -height $::env(IO_LENGTH)
+
+make_io_sites \
+  -horizontal_site IOLibSite \
+  -vertical_site IOLibSite \
+  -corner_site IOLibCSite \
+  -offset $IO_OFFSET
+
+# Place IO cells
+place_pads -row IO_NORTH $::env(IO_NORTH_PINS)
+place_pads -row IO_EAST $::env(IO_EAST_PINS)
+place_pads -row IO_SOUTH $::env(IO_SOUTH_PINS)
+place_pads -row IO_WEST $::env(IO_WEST_PINS)
+
+# Place Corner Cells and Filler
+place_corners sg13g2_Corner
+
+set iofill [regexp -all -inline {\S+} $::env(IO_FILLER_CELLS)]
+
+place_io_fill -row IO_NORTH {*}$iofill
+place_io_fill -row IO_EAST {*}$iofill
+place_io_fill -row IO_SOUTH {*}$iofill
+place_io_fill -row IO_WEST {*}$iofill
+
+connect_by_abutment
+
+set IO_BONDPAD_Y [expr { double($::env(IO_BONDPAD_SIZE)) * -1.0 }]
+place_bondpad -bond $::env(IO_BONDPAD_NAME) sg13g2_IOPad* -offset "5.0 $IO_BONDPAD_Y"
+
+remove_io_rows