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caravel/verilog/rtl/caravan.v

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Seeding with documentation of pinout and verilog RTL (mostly unchanged from original except to remove blocks that are not supposed to be in this repository like the processor core and the storage).
2021-10-12 15:31:42 -05:00
// `default_nettype none
// SPDX-FileCopyrightText: 2020 Efabless Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
/*--------------------------------------------------------------*/
/* caravan, a project harness for the Google/SkyWater sky130 */
/* fabrication process and open source PDK. caravan is an */
/* alternative architecture to caravel that has simple straight */
/* through connections replacing the GPIO pads on the top side */
/* of the padframe. A total of 11 pads are converted from GPIO */
/* to analog, leaving 27 GPIO. */
/* */
/* Copyright 2021 efabless, Inc. */
/* Written by Tim Edwards, December 2019 */
/* and Mohamed Shalan, August 2020 */
/* This file is open source hardware released under the */
/* Apache 2.0 license. See file LICENSE. */
/* */
/*--------------------------------------------------------------*/
/*--------------------------------------------------------------*/
/* Derived types for the array bounds on the two digital and */
/* two analog pad arrays. As defined above, the sections have */
/* the number of pads as follows: */
/* */
/* DIG2 : 13 GPIO pads */
/* ANA2 : 6 analog pads */
/* ANA1 : 5 analog pads */
/* DIG1 : 14 GPIO pads */
/* */
/* This makes a total of 38 pads = `MPRJ_IO_PADS */
/* The pads are still designated as mprj_io[37:0] around the */
/* padframe. The SoC core remains the same, so the programming */
/* of the digital signals remains the same, but the values for */
/* GPIO 15-25 are not used. */
/*--------------------------------------------------------------*/
`define DIG2_TOP (`MPRJ_IO_PADS - 1)
`define DIG2_BOT (`MPRJ_IO_PADS_1 + `ANALOG_PADS_2)
`define ANA2_TOP (`MPRJ_IO_PADS_1 + `ANALOG_PADS_2 - 1)
`define ANA2_BOT (`MPRJ_IO_PADS_1)
`define ANA1_TOP (`MPRJ_IO_PADS_1 - 1)
`define ANA1_BOT (`MPRJ_IO_PADS_1 - `ANALOG_PADS_1)
`define DIG1_TOP (`MPRJ_IO_PADS_1 - `ANALOG_PADS_1 - 1)
`define DIG1_BOT (0)
`define MPRJ_DIG_PADS (`MPRJ_IO_PADS - `ANALOG_PADS)
/*--------------------------------------------------------------*/
/*--------------------------------------------------------------*/
module caravan (
inout vddio, // Common 3.3V padframe/ESD power
inout vddio_2, // Common 3.3V padframe/ESD power
inout vssio, // Common padframe/ESD ground
inout vssio_2, // Common padframe/ESD ground
inout vdda, // Management 3.3V power
inout vssa, // Common analog ground
inout vccd, // Management/Common 1.8V power
inout vssd, // Common digital ground
inout vdda1, // User area 1 3.3V power
inout vdda1_2, // User area 1 3.3V power
inout vdda2, // User area 2 3.3V power
inout vssa1, // User area 1 analog ground
inout vssa1_2, // User area 1 analog ground
inout vssa2, // User area 2 analog ground
inout vccd1, // User area 1 1.8V power
inout vccd2, // User area 2 1.8V power
inout vssd1, // User area 1 digital ground
inout vssd2, // User area 2 digital ground
inout gpio, // Used for external LDO control
inout [`MPRJ_IO_PADS-1:0] mprj_io,
output [`MPRJ_PWR_PADS-1:0] pwr_ctrl_out,
input clock, // CMOS core clock input, not a crystal
input resetb,
// Note that only two pins are available on the flash so dual and
// quad flash modes are not available.
output flash_csb,
output flash_clk,
output flash_io0,
output flash_io1
);
//------------------------------------------------------------
// This value is uniquely defined for each user project.
//------------------------------------------------------------
parameter USER_PROJECT_ID = 32'h00000000;
// These pins are overlaid on mprj_io space. They have the function
// below when the management processor is in reset, or in the default
// configuration. They are assigned to uses in the user space by the
// configuration program running off of the SPI flash. Note that even
// when the user has taken control of these pins, they can be restored
// to the original use by setting the resetb pin low. The SPI pins and
// UART pins can be connected directly to an FTDI chip as long as the
// FTDI chip sets these lines to high impedence (input function) at
// all times except when holding the chip in reset.
// JTAG = mprj_io[0] (inout)
// SDO = mprj_io[1] (output)
// SDI = mprj_io[2] (input)
// CSB = mprj_io[3] (input)
// SCK = mprj_io[4] (input)
// ser_rx = mprj_io[5] (input)
// ser_tx = mprj_io[6] (output)
// irq = mprj_io[7] (input)
// These pins are reserved for any project that wants to incorporate
// its own processor and flash controller. While a user project can
// technically use any available I/O pins for the purpose, these
// four pins connect to a pass-through mode from the SPI slave (pins
// 1-4 above) so that any SPI flash connected to these specific pins
// can be accessed through the SPI slave even when the processor is in
// reset.
// user_flash_csb = mprj_io[8]
// user_flash_sck = mprj_io[9]
// user_flash_io0 = mprj_io[10]
// user_flash_io1 = mprj_io[11]
// One-bit GPIO dedicated to management SoC (outside of user control)
wire gpio_out_core;
wire gpio_in_core;
wire gpio_mode0_core;
wire gpio_mode1_core;
wire gpio_outenb_core;
wire gpio_inenb_core;
// 27 GPIO pads with full controls
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_inp_dis;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_oeb;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_ib_mode_sel;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_vtrip_sel;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_slow_sel;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_holdover;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_analog_en;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_analog_sel;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_analog_pol;
wire [(`MPRJ_IO_PADS-`ANALOG_PADS)*3-1:0] mprj_io_dm;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_in;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_in_3v3;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] mprj_io_out;
// User Project Control (user-facing)
// 27 GPIO bidirectional with in/out/oeb and a 3.3V copy of the input
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] user_io_oeb;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] user_io_in;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] user_io_out;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-1:0] user_io_in_3v3;
// 18 direct connections to GPIO for low-frequency, low-voltage analog
wire [`MPRJ_IO_PADS-`ANALOG_PADS-10:0] user_gpio_analog;
wire [`MPRJ_IO_PADS-`ANALOG_PADS-10:0] user_gpio_noesd;
// 3 power supply ESD clamps for user applications
wire [2:0] user_clamp_high;
wire [2:0] user_clamp_low;
// 11 core connections to the analog pads
wire [`ANALOG_PADS-1:0] user_analog;
/* Padframe control signals */
wire [`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1:0] gpio_serial_link_1;
wire [`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1:0] gpio_serial_link_2;
wire mprj_io_loader_resetn;
wire mprj_io_loader_clock;
wire mprj_io_loader_data_1; /* user1 side serial loader */
wire mprj_io_loader_data_2; /* user2 side serial loader */
// User Project Control management I/O
// There are two types of GPIO connections:
// (1) Full Bidirectional: Management connects to in, out, and oeb
// Uses: JTAG and SDO
// (2) Selectable bidirectional: Management connects to in and out,
// which are tied together. oeb is grounded (oeb from the
// configuration is used)
// SDI = mprj_io[2] (input)
// CSB = mprj_io[3] (input)
// SCK = mprj_io[4] (input)
// ser_rx = mprj_io[5] (input)
// ser_tx = mprj_io[6] (output)
// irq = mprj_io[7] (input)
wire [`MPRJ_IO_PADS-1:0] mgmt_io_in;
wire jtag_out, sdo_out;
wire jtag_outenb, sdo_outenb;
wire gpio_flash_io2_out, gpio_flash_io3_out;
wire [1:0] mgmt_io_nc; /* no-connects */
wire clock_core;
// Power-on-reset signal. The reset pad generates the sense-inverted
// reset at 3.3V. The 1.8V signal and the inverted 1.8V signal are
// derived.
wire porb_h;
wire porb_l;
wire por_l;
wire rstb_h;
wire rstb_l;
wire flash_clk_core, flash_csb_core;
wire flash_clk_oeb_core, flash_csb_oeb_core;
wire flash_clk_ieb_core, flash_csb_ieb_core;
wire flash_io0_oeb_core, flash_io1_oeb_core;
wire flash_io2_oeb_core, flash_io3_oeb_core;
wire flash_io0_ieb_core, flash_io1_ieb_core;
wire flash_io0_do_core, flash_io1_do_core;
wire flash_io0_di_core, flash_io1_di_core;
chip_io_alt #(
.ANALOG_PADS_1(`ANALOG_PADS_1),
.ANALOG_PADS_2(`ANALOG_PADS_2)
) padframe (
`ifndef TOP_ROUTING
// Package Pins
.vddio_pad (vddio), // Common padframe/ESD supply
.vddio_pad2 (vddio_2),
.vssio_pad (vssio), // Common padframe/ESD ground
.vssio_pad2 (vssio_2),
.vccd_pad (vccd), // Common 1.8V supply
.vssd_pad (vssd), // Common digital ground
.vdda_pad (vdda), // Management analog 3.3V supply
.vssa_pad (vssa), // Management analog ground
.vdda1_pad (vdda1), // User area 1 3.3V supply
.vdda1_pad2 (vdda1_2),
.vdda2_pad (vdda2), // User area 2 3.3V supply
.vssa1_pad (vssa1), // User area 1 analog ground
.vssa1_pad2 (vssa1_2),
.vssa2_pad (vssa2), // User area 2 analog ground
.vccd1_pad (vccd1), // User area 1 1.8V supply
.vccd2_pad (vccd2), // User area 2 1.8V supply
.vssd1_pad (vssd1), // User area 1 digital ground
.vssd2_pad (vssd2), // User area 2 digital ground
`endif
// Core Side Pins
.vddio (vddio_core),
.vssio (vssio_core),
.vdda (vdda_core),
.vssa (vssa_core),
.vccd (vccd_core),
.vssd (vssd_core),
.vdda1 (vdda1_core),
.vdda2 (vdda2_core),
.vssa1 (vssa1_core),
.vssa2 (vssa2_core),
.vccd1 (vccd1_core),
.vccd2 (vccd2_core),
.vssd1 (vssd1_core),
.vssd2 (vssd2_core),
.gpio(gpio),
.mprj_io(mprj_io),
.clock(clock),
.resetb(resetb),
.flash_csb(flash_csb),
.flash_clk(flash_clk),
.flash_io0(flash_io0),
.flash_io1(flash_io1),
// SoC Core Interface
.porb_h(porb_h),
.por(por_l),
.resetb_core_h(rstb_h),
.clock_core(clock_core),
.gpio_out_core(gpio_out_core),
.gpio_in_core(gpio_in_core),
.gpio_mode0_core(gpio_mode0_core),
.gpio_mode1_core(gpio_mode1_core),
.gpio_outenb_core(gpio_outenb_core),
.gpio_inenb_core(gpio_inenb_core),
.flash_csb_core(flash_csb_core),
.flash_clk_core(flash_clk_core),
.flash_csb_oeb_core(flash_csb_oeb_core),
.flash_clk_oeb_core(flash_clk_oeb_core),
.flash_io0_oeb_core(flash_io0_oeb_core),
.flash_io1_oeb_core(flash_io1_oeb_core),
.flash_csb_ieb_core(flash_csb_ieb_core),
.flash_clk_ieb_core(flash_clk_ieb_core),
.flash_io0_ieb_core(flash_io0_ieb_core),
.flash_io1_ieb_core(flash_io1_ieb_core),
.flash_io0_do_core(flash_io0_do_core),
.flash_io1_do_core(flash_io1_do_core),
.flash_io0_di_core(flash_io0_di_core),
.flash_io1_di_core(flash_io1_di_core),
.mprj_io_in(mprj_io_in),
.mprj_io_in_3v3(mprj_io_in_3v3),
.mprj_io_out(mprj_io_out),
.mprj_io_oeb(mprj_io_oeb),
.mprj_io_inp_dis(mprj_io_inp_dis),
.mprj_io_ib_mode_sel(mprj_io_ib_mode_sel),
.mprj_io_vtrip_sel(mprj_io_vtrip_sel),
.mprj_io_slow_sel(mprj_io_slow_sel),
.mprj_io_holdover(mprj_io_holdover),
.mprj_io_analog_en(mprj_io_analog_en),
.mprj_io_analog_sel(mprj_io_analog_sel),
.mprj_io_analog_pol(mprj_io_analog_pol),
.mprj_io_dm(mprj_io_dm),
.mprj_gpio_analog(user_gpio_analog),
.mprj_gpio_noesd(user_gpio_noesd),
.mprj_analog(user_analog),
.mprj_clamp_high(user_clamp_high),
.mprj_clamp_low(user_clamp_low)
);
// SoC core
wire caravel_clk;
wire caravel_clk2;
wire caravel_rstn;
wire [7:0] spi_ro_config_core;
// LA signals
wire [127:0] la_data_in_user; // From CPU to MPRJ
wire [127:0] la_data_in_mprj; // From MPRJ to CPU
wire [127:0] la_data_out_mprj; // From CPU to MPRJ
wire [127:0] la_data_out_user; // From MPRJ to CPU
wire [127:0] la_oenb_user; // From CPU to MPRJ
wire [127:0] la_oenb_mprj; // From CPU to MPRJ
wire [127:0] la_iena_mprj; // From CPU only
wire [2:0] user_irq; // From MPRJ to CPU
wire [2:0] user_irq_core;
wire [2:0] user_irq_ena;
// WB MI A (User Project)
wire mprj_cyc_o_core;
wire mprj_stb_o_core;
wire mprj_we_o_core;
wire [3:0] mprj_sel_o_core;
wire [31:0] mprj_adr_o_core;
wire [31:0] mprj_dat_o_core;
wire mprj_ack_i_core;
wire [31:0] mprj_dat_i_core;
// Mask revision
wire [31:0] mask_rev;
wire mprj_clock;
wire mprj_clock2;
wire mprj_reset;
wire mprj_cyc_o_user;
wire mprj_stb_o_user;
wire mprj_we_o_user;
wire [3:0] mprj_sel_o_user;
wire [31:0] mprj_adr_o_user;
wire [31:0] mprj_dat_o_user;
wire mprj_vcc_pwrgood;
wire mprj2_vcc_pwrgood;
wire mprj_vdd_pwrgood;
wire mprj2_vdd_pwrgood;
// Storage area
// Management R/W interface
wire [`RAM_BLOCKS-1:0] mgmt_ena;
wire [`RAM_BLOCKS-1:0] mgmt_wen;
wire [(`RAM_BLOCKS*4)-1:0] mgmt_wen_mask;
wire [7:0] mgmt_addr;
wire [31:0] mgmt_wdata;
wire [(`RAM_BLOCKS*32)-1:0] mgmt_rdata;
// Management RO interface
wire mgmt_ena_ro;
wire [7:0] mgmt_addr_ro;
wire [31:0] mgmt_rdata_ro;
wire [31:0] hkspi_sram_rdata;
wire [7:0] hkspi_sram_addr;
wire hkspi_sram_clk;
wire hkspi_sram_csb;
mgmt_core soc (
`ifdef USE_POWER_PINS
.VPWR(vccd_core),
.VGND(vssd_core),
`endif
// GPIO (1 pin)
.gpio_out_pad(gpio_out_core),
.gpio_in_pad(gpio_in_core),
.gpio_mode0_pad(gpio_mode0_core),
.gpio_mode1_pad(gpio_mode1_core),
.gpio_outenb_pad(gpio_outenb_core),
.gpio_inenb_pad(gpio_inenb_core),
// Primary SPI flash controller
.flash_csb(flash_csb_core),
.flash_clk(flash_clk_core),
.flash_csb_oeb(flash_csb_oeb_core),
.flash_clk_oeb(flash_clk_oeb_core),
.flash_io0_oeb(flash_io0_oeb_core),
.flash_io1_oeb(flash_io1_oeb_core),
.flash_csb_ieb(flash_csb_ieb_core),
.flash_clk_ieb(flash_clk_ieb_core),
.flash_io0_ieb(flash_io0_ieb_core),
.flash_io1_ieb(flash_io1_ieb_core),
.flash_io0_do(flash_io0_do_core),
.flash_io1_do(flash_io1_do_core),
.flash_io0_di(flash_io0_di_core),
.flash_io1_di(flash_io1_di_core),
// Master Reset
.resetb(rstb_l),
.porb(porb_l),
// Clocks and reset
.clock(clock_core),
.core_clk(caravel_clk),
.user_clk(caravel_clk2),
.core_rstn(caravel_rstn),
// IRQ
.user_irq(user_irq),
.user_irq_ena(user_irq_ena),
// Logic Analyzer
.la_input(la_data_in_mprj),
.la_output(la_data_out_mprj),
.la_oenb(la_oenb_mprj),
.la_iena(la_iena_mprj),
// User Project IO Control
.mprj_vcc_pwrgood(mprj_vcc_pwrgood),
.mprj2_vcc_pwrgood(mprj2_vcc_pwrgood),
.mprj_vdd_pwrgood(mprj_vdd_pwrgood),
.mprj2_vdd_pwrgood(mprj2_vdd_pwrgood),
.mprj_io_loader_resetn(mprj_io_loader_resetn),
.mprj_io_loader_clock(mprj_io_loader_clock),
.mprj_io_loader_data_1(mprj_io_loader_data_1),
.mprj_io_loader_data_2(mprj_io_loader_data_2),
.mgmt_in_data(mgmt_io_in),
.mgmt_out_data({gpio_flash_io3_out, gpio_flash_io2_out,
mgmt_io_in[(`MPRJ_IO_PADS-3):2],
mgmt_io_nc}),
.pwr_ctrl_out(pwr_ctrl_out),
.sdo_out(sdo_out),
.sdo_outenb(sdo_outenb),
.jtag_out(jtag_out),
.jtag_outenb(jtag_outenb),
.flash_io2_oeb(flash_io2_oeb_core),
.flash_io3_oeb(flash_io3_oeb_core),
// User Project Slave ports (WB MI A)
.mprj_cyc_o(mprj_cyc_o_core),
.mprj_stb_o(mprj_stb_o_core),
.mprj_we_o(mprj_we_o_core),
.mprj_sel_o(mprj_sel_o_core),
.mprj_adr_o(mprj_adr_o_core),
.mprj_dat_o(mprj_dat_o_core),
.mprj_ack_i(mprj_ack_i_core),
.mprj_dat_i(mprj_dat_i_core),
// mask data
.mask_rev(mask_rev),
// MGMT area R/W interface
.mgmt_ena(mgmt_ena),
.mgmt_wen_mask(mgmt_wen_mask),
.mgmt_wen(mgmt_wen),
.mgmt_addr(mgmt_addr),
.mgmt_wdata(mgmt_wdata),
.mgmt_rdata(mgmt_rdata),
// MGMT area RO interface
.mgmt_ena_ro(mgmt_ena_ro),
.mgmt_addr_ro(mgmt_addr_ro),
.mgmt_rdata_ro(mgmt_rdata_ro),
// HKSPI RO interface
.hkspi_sram_clk(hkspi_sram_clk),
.hkspi_sram_csb(hkspi_sram_csb),
.hkspi_sram_addr(hkspi_sram_addr),
.hkspi_sram_rdata(hkspi_sram_rdata)
);
/* Clock and reset to user space are passed through a tristate */
/* buffer like the above, but since they are intended to be */
/* always active, connect the enable to the logic-1 output from */
/* the vccd1 domain. */
mgmt_protect mgmt_buffers (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
.vccd2(vccd2_core),
.vssd2(vssd2_core),
.vdda1(vdda1_core),
.vssa1(vssa1_core),
.vdda2(vdda2_core),
.vssa2(vssa2_core),
`endif
.caravel_clk(caravel_clk),
.caravel_clk2(caravel_clk2),
.caravel_rstn(caravel_rstn),
.mprj_cyc_o_core(mprj_cyc_o_core),
.mprj_stb_o_core(mprj_stb_o_core),
.mprj_we_o_core(mprj_we_o_core),
.mprj_sel_o_core(mprj_sel_o_core),
.mprj_adr_o_core(mprj_adr_o_core),
.mprj_dat_o_core(mprj_dat_o_core),
.user_irq_core(user_irq_core),
.la_data_out_core(la_data_out_user),
.la_data_out_mprj(la_data_out_mprj),
.la_data_in_core(la_data_in_user),
.la_data_in_mprj(la_data_in_mprj),
.la_oenb_mprj(la_oenb_mprj),
.la_oenb_core(la_oenb_user),
.la_iena_mprj(la_iena_mprj),
.user_irq_ena(user_irq_ena),
.user_clock(mprj_clock),
.user_clock2(mprj_clock2),
.user_reset(mprj_reset),
.mprj_cyc_o_user(mprj_cyc_o_user),
.mprj_stb_o_user(mprj_stb_o_user),
.mprj_we_o_user(mprj_we_o_user),
.mprj_sel_o_user(mprj_sel_o_user),
.mprj_adr_o_user(mprj_adr_o_user),
.mprj_dat_o_user(mprj_dat_o_user),
.user_irq(user_irq),
.user1_vcc_powergood(mprj_vcc_pwrgood),
.user2_vcc_powergood(mprj2_vcc_pwrgood),
.user1_vdd_powergood(mprj_vdd_pwrgood),
.user2_vdd_powergood(mprj2_vdd_pwrgood)
);
/*----------------------------------------------*/
/* Wrapper module around the user project */
/*----------------------------------------------*/
assign user_io_in_3v3 = mprj_io_in_3v3;
user_analog_project_wrapper mprj (
`ifdef USE_POWER_PINS
.vdda1(vdda1_core), // User area 1 3.3V power
.vdda2(vdda2_core), // User area 2 3.3V power
.vssa1(vssa1_core), // User area 1 analog ground
.vssa2(vssa2_core), // User area 2 analog ground
.vccd1(vccd1_core), // User area 1 1.8V power
.vccd2(vccd2_core), // User area 2 1.8V power
.vssd1(vssd1_core), // User area 1 digital ground
.vssd2(vssd2_core), // User area 2 digital ground
`endif
.wb_clk_i(mprj_clock),
.wb_rst_i(mprj_reset),
// MGMT SoC Wishbone Slave
.wbs_cyc_i(mprj_cyc_o_user),
.wbs_stb_i(mprj_stb_o_user),
.wbs_we_i(mprj_we_o_user),
.wbs_sel_i(mprj_sel_o_user),
.wbs_adr_i(mprj_adr_o_user),
.wbs_dat_i(mprj_dat_o_user),
.wbs_ack_o(mprj_ack_i_core),
.wbs_dat_o(mprj_dat_i_core),
// Logic Analyzer
.la_data_in(la_data_in_user),
.la_data_out(la_data_out_user),
.la_oenb(la_oenb_user),
// IO Pads
.io_in (user_io_in),
.io_in_3v3 (user_io_in_3v3),
.io_out(user_io_out),
.io_oeb(user_io_oeb),
.gpio_analog(user_gpio_analog),
.gpio_noesd(user_gpio_noesd),
.io_clamp_high(user_clamp_high),
.io_clamp_low(user_clamp_low),
.io_analog(user_analog),
// Independent clock
.user_clock2(mprj_clock2),
// IRQ
.user_irq(user_irq_core)
);
/*--------------------------------------*/
/* End user project instantiation */
/*--------------------------------------*/
wire [`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1:0] gpio_serial_link_1_shifted;
wire [`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1:0] gpio_serial_link_2_shifted;
assign gpio_serial_link_1_shifted = {gpio_serial_link_1[`MPRJ_IO_PADS_1-`ANALOG_PADS_1-2:0],
mprj_io_loader_data_1};
// Note that serial_link_2 is backwards compared to serial_link_1, so it
// shifts in the other direction.
assign gpio_serial_link_2_shifted = {mprj_io_loader_data_2,
gpio_serial_link_2[`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1:1]};
// Propagating clock and reset to mitigate timing and fanout issues
wire [`MPRJ_IO_PADS_1-1:0] gpio_clock_1;
wire [`MPRJ_IO_PADS_2-1:0] gpio_clock_2;
wire [`MPRJ_IO_PADS_1-1:0] gpio_resetn_1;
wire [`MPRJ_IO_PADS_2-1:0] gpio_resetn_2;
wire [`MPRJ_IO_PADS_1-6:0] gpio_clock_1_shifted;
wire [`MPRJ_IO_PADS_2-7:0] gpio_clock_2_shifted;
wire [`MPRJ_IO_PADS_1-6:0] gpio_resetn_1_shifted;
wire [`MPRJ_IO_PADS_2-7:0] gpio_resetn_2_shifted;
assign gpio_clock_1_shifted = {gpio_clock_1[`MPRJ_IO_PADS_1-`ANALOG_PADS_1-2:0],
mprj_io_loader_clock};
assign gpio_clock_2_shifted = {mprj_io_loader_clock,
gpio_clock_2[`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1:1]};
assign gpio_resetn_1_shifted = {gpio_resetn_1[`MPRJ_IO_PADS_1-`ANALOG_PADS_1-2:0],
mprj_io_loader_resetn};
assign gpio_resetn_2_shifted = {mprj_io_loader_resetn,
gpio_resetn_2[`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1:1]};
// Each control block sits next to an I/O pad in the user area.
// It gets input through a serial chain from the previous control
// block and passes it to the next control block. Due to the nature
// of the shift register, bits are presented in reverse, as the first
// bit in ends up as the last bit of the last I/O pad control block.
// There are two types of block; the first two and the last two
// are configured to be full bidirectional under control of the
// management Soc (JTAG and SDO for the first two; flash_io2 and
// flash_io3 for the last two). The rest are configured to be default
// (input). Note that the first two and last two are the ones closest
// to the management SoC on either side, which minimizes the wire length
// of the extra signals those pads need.
/* First two GPIOs (JTAG and SDO) */
gpio_control_block #(
.MGMT_INIT(1'b1), // Under management control
.OENB_INIT(1'b1) // Enable output signaling from wire
) gpio_control_bidir_1 [1:0] (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
`endif
// Management Soc-facing signals
.resetn(gpio_resetn_1_shifted[1:0]),
.serial_clock(gpio_clock_1_shifted[1:0]),
.resetn_out(gpio_resetn_1[1:0]),
.serial_clock_out(gpio_clock_1[1:0]),
.mgmt_gpio_in(mgmt_io_in[1:0]),
.mgmt_gpio_out({sdo_out, jtag_out}),
.mgmt_gpio_oeb({sdo_outenb, jtag_outenb}),
.one(),
.zero(),
// Serial data chain for pad configuration
.serial_data_in(gpio_serial_link_1_shifted[1:0]),
.serial_data_out(gpio_serial_link_1[1:0]),
// User-facing signals
.user_gpio_out(user_io_out[1:0]),
.user_gpio_oeb(user_io_oeb[1:0]),
.user_gpio_in(user_io_in[1:0]),
// Pad-facing signals (Pad GPIOv2)
.pad_gpio_inenb(mprj_io_inp_dis[1:0]),
.pad_gpio_ib_mode_sel(mprj_io_ib_mode_sel[1:0]),
.pad_gpio_vtrip_sel(mprj_io_vtrip_sel[1:0]),
.pad_gpio_slow_sel(mprj_io_slow_sel[1:0]),
.pad_gpio_holdover(mprj_io_holdover[1:0]),
.pad_gpio_ana_en(mprj_io_analog_en[1:0]),
.pad_gpio_ana_sel(mprj_io_analog_sel[1:0]),
.pad_gpio_ana_pol(mprj_io_analog_pol[1:0]),
.pad_gpio_dm(mprj_io_dm[5:0]),
.pad_gpio_outenb(mprj_io_oeb[1:0]),
.pad_gpio_out(mprj_io_out[1:0]),
.pad_gpio_in(mprj_io_in[1:0])
);
/* Section 1 GPIOs (GPIO 0 to 18) */
wire [`MPRJ_IO_PADS_1-`ANALOG_PADS_1-3:0] one_loop1;
/* Section 1 GPIOs (GPIO 8 to 18) */
gpio_control_block gpio_control_in_1 [`MPRJ_IO_PADS_1-`ANALOG_PADS_1-3:6] (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
`endif
// Management Soc-facing signals
.resetn(gpio_resetn_1_shifted[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.serial_clock(gpio_clock_1_shifted[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.resetn_out(gpio_resetn_1[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.serial_clock_out(gpio_clock_1[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.mgmt_gpio_in(mgmt_io_in[`DIG1_TOP:8]),
.mgmt_gpio_out(mgmt_io_in[`DIG1_TOP:8]),
.mgmt_gpio_oeb(one_loop1[`MPRJ_IO_PADS_1-`ANALOG_PADS_1-3:6]),
.one(one_loop1[`MPRJ_IO_PADS_1-`ANALOG_PADS_1-3:6]),
.zero(),
// Serial data chain for pad configuration
.serial_data_in(gpio_serial_link_1_shifted[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.serial_data_out(gpio_serial_link_1[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
// User-facing signals
.user_gpio_out(user_io_out[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.user_gpio_oeb(user_io_oeb[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.user_gpio_in(user_io_in[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
// Pad-facing signals (Pad GPIOv2)
.pad_gpio_inenb(mprj_io_inp_dis[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_ib_mode_sel(mprj_io_ib_mode_sel[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_vtrip_sel(mprj_io_vtrip_sel[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_slow_sel(mprj_io_slow_sel[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_holdover(mprj_io_holdover[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_ana_en(mprj_io_analog_en[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_ana_sel(mprj_io_analog_sel[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_ana_pol(mprj_io_analog_pol[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_dm(mprj_io_dm[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)*3-1:24]),
.pad_gpio_outenb(mprj_io_oeb[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_out(mprj_io_out[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8]),
.pad_gpio_in(mprj_io_in[(`MPRJ_IO_PADS_1-`ANALOG_PADS_1-1):8])
);
/* Section 1 GPIOs (GPIO 2 to 7) */
gpio_control_block #(
.MGMT_INIT(1'b1), /* Under management control */
.DM_INIT(3'b001), /* Set as type input */
.OENB_INIT(1'b1) /* Output is disabled */
) gpio_control_in_1a [5:0] (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
`endif
// Management Soc-facing signals
.resetn(gpio_resetn_1_shifted[7:2]),
.serial_clock(gpio_clock_1_shifted[7:2]),
.resetn_out(gpio_resetn_1[7:2]),
.serial_clock_out(gpio_clock_1[7:2]),
.mgmt_gpio_in(mgmt_io_in[7:2]),
.mgmt_gpio_out(mgmt_io_in[7:2]),
.mgmt_gpio_oeb(one_loop1[5:0]),
.one(one_loop1[5:0]),
.zero(),
// Serial data chain for pad configuration
.serial_data_in(gpio_serial_link_1_shifted[7:2]),
.serial_data_out(gpio_serial_link_1[7:2]),
// User-facing signals
.user_gpio_out(user_io_out[7:2]),
.user_gpio_oeb(user_io_oeb[7:2]),
.user_gpio_in(user_io_in[7:2]),
// Pad-facing signals (Pad GPIOv2)
.pad_gpio_inenb(mprj_io_inp_dis[7:2]),
.pad_gpio_ib_mode_sel(mprj_io_ib_mode_sel[7:2]),
.pad_gpio_vtrip_sel(mprj_io_vtrip_sel[7:2]),
.pad_gpio_slow_sel(mprj_io_slow_sel[7:2]),
.pad_gpio_holdover(mprj_io_holdover[7:2]),
.pad_gpio_ana_en(mprj_io_analog_en[7:2]),
.pad_gpio_ana_sel(mprj_io_analog_sel[7:2]),
.pad_gpio_ana_pol(mprj_io_analog_pol[7:2]),
.pad_gpio_dm(mprj_io_dm[23:6]),
.pad_gpio_outenb(mprj_io_oeb[7:2]),
.pad_gpio_out(mprj_io_out[7:2]),
.pad_gpio_in(mprj_io_in[7:2])
);
/* Last two GPIOs (flash_io2 and flash_io3) */
gpio_control_block #(
.MGMT_INIT(1'b1), // Under management control
.OENB_INIT(1'b1) // Enable output signaling from wire
) gpio_control_bidir_2 [1:0] (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
`endif
// Management Soc-facing signals
.resetn(gpio_resetn_1_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
.serial_clock(gpio_clock_1_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
.resetn_out(gpio_resetn_1[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
.serial_clock_out(gpio_clock_1[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
.mgmt_gpio_in(mgmt_io_in[(`DIG2_TOP):(`DIG2_TOP-1)]),
.mgmt_gpio_out({gpio_flash_io3_out, gpio_flash_io2_out}),
.mgmt_gpio_oeb({flash_io3_oeb_core, flash_io2_oeb_core}),
.one(),
.zero(),
// Serial data chain for pad configuration
.serial_data_in(gpio_serial_link_2_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
.serial_data_out(gpio_serial_link_2[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-1):(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-2)]),
// User-facing signals
.user_gpio_out(user_io_out[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.user_gpio_oeb(user_io_oeb[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.user_gpio_in(user_io_in[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
// Pad-facing signals (Pad GPIOv2)
.pad_gpio_inenb(mprj_io_inp_dis[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_ib_mode_sel(mprj_io_ib_mode_sel[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_vtrip_sel(mprj_io_vtrip_sel[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_slow_sel(mprj_io_slow_sel[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_holdover(mprj_io_holdover[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_ana_en(mprj_io_analog_en[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_ana_sel(mprj_io_analog_sel[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_ana_pol(mprj_io_analog_pol[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_dm(mprj_io_dm[(`MPRJ_DIG_PADS*3-1):(`MPRJ_DIG_PADS*3-6)]),
.pad_gpio_outenb(mprj_io_oeb[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_out(mprj_io_out[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)]),
.pad_gpio_in(mprj_io_in[(`MPRJ_DIG_PADS-1):(`MPRJ_DIG_PADS-2)])
);
/* Section 2 GPIOs (GPIO 19 to 37) */
wire [`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3:0] one_loop2;
gpio_control_block gpio_control_in_2 [`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3:0] (
`ifdef USE_POWER_PINS
.vccd(vccd_core),
.vssd(vssd_core),
.vccd1(vccd1_core),
.vssd1(vssd1_core),
`endif
// Management Soc-facing signals
.resetn(gpio_resetn_1_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
.serial_clock(gpio_clock_1_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
.resetn_out(gpio_resetn_1[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
.serial_clock_out(gpio_clock_1[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
.mgmt_gpio_in(mgmt_io_in[(`DIG2_TOP-2):`DIG2_BOT]),
.mgmt_gpio_out(mgmt_io_in[(`DIG2_TOP-2):`DIG2_BOT]),
.mgmt_gpio_oeb(one_loop2),
.one(one_loop2),
.zero(),
// Serial data chain for pad configuration
.serial_data_in(gpio_serial_link_2_shifted[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
.serial_data_out(gpio_serial_link_2[(`MPRJ_IO_PADS_2-`ANALOG_PADS_2-3):0]),
// User-facing signals
.user_gpio_out(user_io_out[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.user_gpio_oeb(user_io_oeb[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.user_gpio_in(user_io_in[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
// Pad-facing signals (Pad GPIOv2)
.pad_gpio_inenb(mprj_io_inp_dis[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_ib_mode_sel(mprj_io_ib_mode_sel[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_vtrip_sel(mprj_io_vtrip_sel[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_slow_sel(mprj_io_slow_sel[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_holdover(mprj_io_holdover[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_ana_en(mprj_io_analog_en[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_ana_sel(mprj_io_analog_sel[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_ana_pol(mprj_io_analog_pol[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_dm(mprj_io_dm[((`MPRJ_DIG_PADS)*3-7):((`MPRJ_IO_PADS_1-`ANALOG_PADS_1)*3)]),
.pad_gpio_outenb(mprj_io_oeb[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_out(mprj_io_out[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)]),
.pad_gpio_in(mprj_io_in[(`MPRJ_DIG_PADS-3):(`MPRJ_IO_PADS_1-`ANALOG_PADS_1)])
);
user_id_programming #(
.USER_PROJECT_ID(USER_PROJECT_ID)
) user_id_value (
`ifdef USE_POWER_PINS
.VPWR(vccd_core),
.VGND(vssd_core),
`endif
.mask_rev(mask_rev)
);
// Power-on-reset circuit
simple_por por (
`ifdef USE_POWER_PINS
.vdd3v3(vddio_core),
.vdd1v8(vccd_core),
.vss(vssio_core),
`endif
.porb_h(porb_h),
.porb_l(porb_l),
.por_l(por_l)
);
// XRES (chip input pin reset) reset level converter
sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped rstb_level (
`ifdef USE_POWER_PINS
.VPWR(vddio_core),
.LVPWR(vccd_core),
.VGND(vssio_core),
`endif
.A(rstb_h),
.X(rstb_l)
);
// Storage area
storage storage(
`ifdef USE_POWER_PINS
.VPWR(vccd_core),
.VGND(vssd_core),
`endif
.mgmt_clk(caravel_clk),
.mgmt_ena(mgmt_ena),
.mgmt_wen(mgmt_wen),
.mgmt_wen_mask(mgmt_wen_mask),
.mgmt_addr(mgmt_addr),
.mgmt_wdata(mgmt_wdata),
.mgmt_rdata(mgmt_rdata),
// Management RO interface
.mgmt_ena_ro(mgmt_ena_ro),
.mgmt_addr_ro(mgmt_addr_ro),
.mgmt_rdata_ro(mgmt_rdata_ro),
.hkspi_sram_clk(hkspi_sram_clk),
.hkspi_sram_csb(hkspi_sram_csb),
.hkspi_sram_addr(hkspi_sram_addr),
.hkspi_sram_rdata(hkspi_sram_rdata)
);
endmodule
// `default_nettype wire