Firmweaver

Firmweaver is a collection of tools for Chromium OS to assist with initial firmware setup during board bringup.

Introduction

The Chromium OS project includes tools to assist with initial firmware setup during board bringup. These tools generate certain objects in Application Processor (AP) and Embedded Controller (EC) firmware (e.g., EC devicetree, AP GPIO configuration, etc.).

The tools take a curated sheet as prepared by the hardware team as an input and generate these objects as output. Developers can validate the generated output and contribute them to the concerned project.

Features

Automatic Generation: Generates firmware objects from hardware sheets.
Supported Outputs:
- AP GPIO Configuration (coreboot_gpio, alias: gpio)
- EC Devicetree (zephyr_dtsi, alias: dtsi)

Getting Started

Running Firmweaver

Run ./firmweaver from this directory. On first use (and after source changes) it builds the tool for your machine into .bin/. Requires Go on your PATH.

./firmweaver --help

Building for Development

To build without running, write the binary to .bin/ (where ./firmweaver looks for it). Don't use -o firmweaver; that overwrites the wrapper script.

go build -o .bin/firmweaver .

Authentication

./firmweaver auth login
./firmweaver auth status

Usage

Running the Coreboot GPIO Tool

The coreboot_gpio (alias: gpio) parses a GPIO map CSV file or Google Sheet and generates C configuration code.

./firmweaver coreboot_gpio --soc <soc_type> (--csv <path_to_csv> | --sheet <sheet_url_or_id>) [--output <path_to_output_c_file>]

Arguments:

--soc: SoC type. Supported values: intel, qcom, mtk. (Required)
--csv: Path to the local CSV file containing the GPIO map.
--sheet: Google Sheets URL, ID, or go/ shortlink.
--sheet-tab: Optional specific sheet tab title to read.
--output: Path to the output file. If omitted, output is written to stdout.

Example:

To generate Intel GPIO configuration from the provided example CSV:

./firmweaver coreboot_gpio --soc intel --csv coreboot_gpio/test/ExampleGpio.csv --output coreboot_gpio/test/gpio_config.c

(You can also use the shorthand ./firmweaver gpio ...)

Or directly from a Google Sheet:

./firmweaver coreboot_gpio --soc intel --sheet "go/firmweaver-example-gpio-go-link" --output coreboot_gpio/test/gpio_config.c

Running the EC Zephyr Devicetree Generator

The zephyr_dtsi (alias: dtsi) parses an EC pinout CSV spreadsheet or Google Sheet and generates Zephyr devicetree overlays.

./firmweaver zephyr_dtsi --chip <chip_name> (--csv <path_to_csv> | --sheet <sheet_url_or_id>) [--pin-col <variant>] [--output <path_to_output_dtsi>]

Example:

To generate Nuvoton NPCX9 Devicetree overlay from the provided example CSV:

./firmweaver zephyr_dtsi --chip npcx99 --csv zephyr_dtsi/test/ExampleEcPinout.csv --pin-col "NPCX99 (NPCX)" --output zephyr_dtsi/test/generated.dtsi

(You can also use the shorthand ./firmweaver dtsi ...)

Or directly from a Google Sheet:

./firmweaver zephyr_dtsi --chip npcx99 --sheet "go/firmweaver-example-ec-go-link" --output zephyr_dtsi/test/generated.dtsi

Testing

Run unit tests across all tools in the workspace:

go test -v ./...

Contributing

This project follows the standard Chromium OS contribution process.