Fan Curve Adjustment to avoid CPU Throttling

- Modify fan curve to avoid CPU throttling
- Reduce fan curve cooldown time for oryp7

.editorconfig

@@ -13,8 +13,8 @@ trim_trailing_whitespace = true
 [*.md]
 trim_trailing_whitespace = false
 
-[*.mk]
+[{Makefile,*.mk}]
 indent_style = tab
 
-[Makefile]
-indent_style = tab
+[*.yml]
+indent_size = 2

.github/workflows/ci.yml

@@ -0,0 +1,67 @@
+name: CI
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  lint:
+    runs-on: ubuntu-24.04
+    outputs:
+      boards: ${{ steps.board-matrix.outputs.boards }}
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: ./scripts/deps.sh
+
+      - name:  Check SPDX tags
+        run: ./scripts/lint/01-spdx-tags.sh
+
+      - name: Check formatting
+        run: ./scripts/lint/02-uncrustify.sh
+
+      - name: Check shell scripts
+        run: ./scripts/lint/03-shellcheck.sh
+
+      - name: Generate board matrix
+        id: board-matrix
+        run: echo "boards=$(make list-boards | jq -sRc 'split("\n")[:-1]')" >> $GITHUB_OUTPUT
+
+  tool:
+    strategy:
+      matrix:
+        include:
+          - features:
+          - features: --no-default-features --features="redox_hwio"
+
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: ./scripts/deps.sh
+
+      - name: Build tool
+        run: cargo build ${{ matrix.features }} --release --manifest-path tool/Cargo.toml
+
+  ec:
+    runs-on: ubuntu-24.04
+    needs: lint
+    strategy:
+      matrix:
+        boards: ${{ fromJson(needs.lint.outputs.boards) }}
+        # TODO: Conditionally build based on files changed?
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: ./scripts/deps.sh
+
+      - name: Build firmware
+        run: make BOARD=${{ matrix.boards }} VERBOSE=1
+
+      - name: Show memory layout
+        run: cat build/ec.mem
+        continue-on-error: true

.uncrustify.cfg

@@ -0,0 +1,156 @@
+# SPDX-License-Identifier: CC0-1.0
+# SPDX-FileCopyrightText: NONE
+
+# Uncrustify-0.78.1_f
+# https://github.com/uncrustify/uncrustify/blob/uncrustify-0.78.1/documentation/htdocs/config.txt
+
+newlines                        = lf
+input_tab_size                  = 4
+output_tab_size                 = 4
+disable_processing_cmt          = "uncrustify:off"
+enable_processing_cmt           = "uncrustify:on"
+utf8_bom                        = remove
+sp_arith_additive               = force
+sp_assign                       = force
+sp_enum_brace                   = force
+sp_enum_after_assign            = force
+sp_pp_concat                    = ignore
+sp_bool                         = force
+sp_compare                      = force
+sp_inside_paren                 = remove
+sp_paren_paren                  = remove
+sp_cparen_oparen                = remove
+sp_paren_brace                  = force
+sp_before_ptr_star              = force
+sp_between_ptr_star             = remove
+sp_between_ptr_ref              = remove
+sp_after_ptr_star               = remove
+sp_after_type                   = ignore # XXX: Fixes using macros in assignments
+sp_before_sparen                = force
+sp_inside_sparen                = remove
+sp_inside_for                   = remove
+sp_sparen_paren                 = remove
+sp_sparen_brace                 = force
+sp_do_brace_open                = force
+sp_brace_close_while            = force
+sp_before_semi_for              = remove
+sp_before_semi_for_empty        = remove
+sp_between_semi_for_empty       = remove
+sp_after_semi_for_empty         = remove
+sp_before_square                = remove
+sp_before_squares               = remove
+sp_inside_square                = remove
+sp_after_comma                  = add
+sp_after_cast                   = remove
+sp_inside_paren_cast            = remove
+sp_sizeof_paren                 = remove
+sp_inside_braces                = add
+sp_inside_braces_empty          = remove
+sp_func_proto_paren             = remove
+sp_func_def_paren               = remove
+sp_inside_fparens               = remove
+sp_inside_fparen                = remove
+sp_inside_tparen                = remove
+sp_after_tparen_close           = remove
+sp_fparen_brace                 = force
+sp_func_call_paren              = remove
+sp_return_paren                 = force
+sp_attribute_paren              = remove
+sp_defined_paren                = remove
+sp_else_brace                   = force
+sp_brace_else                   = force
+sp_brace_typedef                = force
+sp_before_nl_cont               = force
+sp_cond_colon                   = force
+sp_cond_question                = force
+sp_endif_cmt                    = force
+sp_before_tr_cmt                = add
+sp_num_before_tr_cmt            = 1
+indent_columns                  = 4
+indent_with_tabs                = 0
+indent_macro_brace              = false
+indent_ignore_label             = true
+indent_paren_close              = 2
+indent_align_assign             = false
+indent_align_paren              = false
+indent_compound_literal_return  = false
+nl_collapse_empty_body          = true
+nl_collapse_empty_body_functions = true
+nl_start_of_file                = remove
+nl_end_of_file                  = force
+nl_end_of_file_min              = 1
+nl_assign_brace                 = remove
+nl_fcall_brace                  = remove
+nl_enum_brace                   = remove
+nl_struct_brace                 = remove
+nl_union_brace                  = remove
+nl_if_brace                     = remove
+nl_brace_else                   = remove
+nl_else_brace                   = remove
+nl_else_if                      = remove
+nl_for_brace                    = remove
+nl_while_brace                  = remove
+nl_do_brace                     = remove
+nl_brace_while                  = remove
+nl_switch_brace                 = remove
+nl_after_case                   = true
+nl_enum_own_lines               = force
+nl_func_type_name               = remove
+nl_func_proto_type_name         = remove
+nl_func_paren                   = remove
+nl_func_def_paren               = remove
+nl_func_call_paren              = remove
+nl_fdef_brace                   = remove
+nl_return_expr                  = remove
+nl_after_semicolon              = true
+nl_brace_struct_var             = remove
+nl_ds_struct_enum_close_brace   = true
+nl_split_if_one_liner           = true
+nl_split_for_one_liner          = true
+nl_split_while_one_liner        = true
+nl_max                          = 2
+eat_blanks_after_open_brace     = true
+eat_blanks_before_close_brace   = true
+code_width                      = 100
+ls_for_split_full               = true
+ls_func_split_full              = true
+align_on_tabstop                = true
+align_var_def_star_style        = 1
+align_var_def_amp_style         = 1
+align_typedef_star_style        = 1
+align_typedef_amp_style         = 1
+align_func_proto_star_style     = 1
+align_func_proto_amp_style      = 1
+align_pp_define_together        = true
+cmt_width                       = 100
+cmt_convert_tab_to_spaces       = true
+cmt_trailing_single_line_c_to_cpp = true
+mod_paren_on_return             = remove
+mod_remove_extra_semicolon      = true
+mod_remove_duplicate_include    = true
+mod_sort_incl_import_prioritize_filename = true
+mod_move_case_break             = true
+mod_move_case_return            = true
+mod_remove_empty_return         = true
+mod_enum_last_comma             = add
+pp_multiline_define_body_indent = 4
+pp_indent_case                  = false
+pp_indent_func_def              = false
+pp_indent_extern                = false
+
+#set QUALIFIER __at # XXX: Allow it to be treated as a function call
+set QUALIFIER __code
+set QUALIFIER __critical
+set QUALIFIER __data
+set QUALIFIER __idata
+set QUALIFIER __pdata
+set QUALIFIER __reentrant
+set QUALIFIER __xdata
+
+set TYPE __bit
+set TYPE __sbit
+set TYPE __sfr
+set TYPE __sfr16
+set TYPE __sfr32
+
+set FUNC_CALL __asm__

Makefile

@@ -2,60 +2,102 @@
 
 -include config.mk
 
+# Disable built-in rules and variables
+MAKEFLAGS += -rR
+
+# Default to silent builds
+ifneq ($(VERBOSE),1)
+MAKEFLAGS += -s
+endif
+
+# Set build directory
+BUILD = build
+
 # Parameter for current board
 ifeq ($(BOARD),)
 all:
-	@echo "Please set BOARD to one of the following:"
-	@cd src/board && for board in */*/board.mk; do \
-		echo "  $$(dirname "$$board")"; \
-	done
-	@exit 1
+	$(error BOARD must be specified)
 else
 # Calculate version
-DATE=$(shell git show --format="%cd" --date="format:%Y-%m-%d" --no-patch)
-REV=$(shell git describe --always --dirty)
+DATE=$(shell git show --format="%cs" --no-patch --no-show-signature)
+REV=$(shell git describe --abbrev=7 --always --dirty)
 VERSION?=$(DATE)_$(REV)
 
-# Set build directory
-BUILD=build/$(BOARD)/$(VERSION)
-
 # Default target - build the board's EC firmware
 all: $(BUILD)/ec.rom
-	$(info Built '$(VERSION)' for '$(BOARD)')
+	$(info Built $(VERSION) for $(BOARD))
 
 # Include common source
 COMMON_DIR=src/common
-SRC=$(wildcard $(COMMON_DIR)/*.c)
-INCLUDE=$(wildcard $(COMMON_DIR)/include/common/*.h) $(COMMON_DIR)/common.mk
+INCLUDE += $(COMMON_DIR)/common.mk
 CFLAGS=-I$(COMMON_DIR)/include -D__FIRMWARE_VERSION__=$(VERSION)
 include $(COMMON_DIR)/common.mk
+SRC += $(foreach src, $(common-y), $(COMMON_DIR)/$(src))
 
 # Include the board's source
 BOARD_DIR=src/board/$(BOARD)
-SRC+=$(wildcard $(BOARD_DIR)/*.c)
-INCLUDE+=$(wildcard $(BOARD_DIR)/include/board/*.h) $(BOARD_DIR)/board.mk
+INCLUDE += $(BOARD_DIR)/board.mk
 CFLAGS+=-I$(BOARD_DIR)/include -D__BOARD__=$(BOARD)
 include $(BOARD_DIR)/board.mk
+SRC += $(foreach src, $(board-y), $(BOARD_DIR)/$(src))
+SRC += $(foreach src, $(board-common-y), $(SYSTEM76_COMMON_DIR)/$(src))
+SRC += $(foreach src, $(keyboard-y), $(KEYBOARD_DIR)/$(src))
 
 # The board will define the embedded controller
 # Include the embedded controller's source
 EC_DIR=src/ec/$(EC)
-SRC+=$(wildcard $(EC_DIR)/*.c)
-INCLUDE+=$(wildcard $(EC_DIR)/include/ec/*.h) $(EC_DIR)/ec.mk
-CFLAGS+=-I$(EC_DIR)/include -D__EC__=$(EC)
+INCLUDE += $(EC_DIR)/ec.mk
+CFLAGS+=-I$(EC_DIR)/include
 include $(EC_DIR)/ec.mk
+SRC += $(foreach src, $(ec-y), $(EC_DIR)/$(src))
 
 # The EC will define the architecture
 # Include the architecture's source
 ARCH_DIR=src/arch/$(ARCH)
-SRC+=$(wildcard $(ARCH_DIR)/*.c)
-INCLUDE+=$(wildcard $(ARCH_DIR)/include/arch/*.h) $(ARCH_DIR)/arch.mk
+INCLUDE += $(ARCH_DIR)/arch.mk
 CFLAGS+=-I$(ARCH_DIR)/include -D__ARCH__=$(ARCH)
 include $(ARCH_DIR)/arch.mk
+SRC += $(foreach src, $(arch-y), $(ARCH_DIR)/$(src))
+
+include $(ARCH_DIR)/toolchain.mk
 
 # The architecture defines build targets, no more is required
 endif
 
-# Target to remove build artifacts
+.PHONY: docs
+docs:
+	mdbook build docs/
+
+.PHONY: clean
 clean:
-	rm -rf build
+	rm -rf $(BUILD)
+
+.PHONY: fmt
+fmt:
+	uncrustify -c .uncrustify.cfg -q --no-backup $(shell git ls-files '*.c' '*.h')
+
+.PHONY: lint
+lint:
+	./scripts/lint/lint.sh
+
+.PHONY: list-boards
+list-boards:
+	@cd src/board && for board in */*/board.mk; do \
+		echo "$$(dirname "$$board")"; \
+	done
+
+# This target is run during setup, and is not shown in the help text.
+.PHONY: git-config
+git-config:
+	$(eval HOOKS = "$(shell git rev-parse --git-dir)/hooks")
+	ln -sfrv scripts/hooks/pre-commit.sh "$(HOOKS)/pre-commit"
+
+.PHONY: help
+help:
+	@echo "System76 EC build targets"
+	@echo "    [all] BOARD=<B>      Build the specified board"
+	@echo "    list-boards          List available target boards"
+	@echo "    clean                Remove build artifacts"
+	@echo "    fmt                  Format the source code"
+	@echo "    lint                 Run lint checks"
+	@echo "    help                 Print this message"

README.md

@@ -5,23 +5,67 @@ laptops.
 
 ## Documentation
 
-- [Supported embedded controllers](./doc/controllers.md)
-- [Flashing firmware](./doc/flashing.md)
-- [Debugging](./doc/debugging.md)
-- [Creating a custom keyboard layout](./doc/keyboard-layout-customization.md)
-- [Adding a new board](./doc/adding-a-new-board.md)
+- [Supported embedded controllers](./docs/controllers.md)
+- [Flashing firmware](./docs/flashing.md)
+- [Debugging](./docs/debugging.md)
+- [Creating a custom keyboard layout](./docs/keyboard-layout-customization.md)
+- [Development environment](./docs/dev-env.md)
+- [Adding a new board](./docs/adding-a-new-board.md)
 
-## Dependencies
+## Quickstart
 
-The complete set of dependencies can be installed using the `deps.sh` script
-from the [Open Firmware](https://github.com/system76/firmware-open) repo.
+Install dependencies using the provided script.
 
-Dependencies specific to EC development can be installed with:
+```sh
+./scripts/deps.sh
+```
+
+If rustup was installed as part of this, then the correct `cargo` will not be
+available in the running session. Start a new shell session or source the env
+file to update `PATH`.
+
+```sh
+source $HOME/.cargo/env
+```
+
+Then build the firmware for your laptop model.
+
+```sh
+make BOARD=system76/<model>
+```
+
+See [Flashing](./docs/flashing.md) for how to use the new firmware image.
+
+## Releases
+
+The EC firmware itself does not have tagged releases. Any commit of this repo
+may be used as a part of a [System76 Open Firmware][firmware-open] release.
+
+In official releases the EC shares the same version as the BIOS firmware. Run
+the follow command from firmware-open to determine the corresponding EC commit
+for a release.
 
 ```
-sudo apt install \
-  avr-libc \
-  avrdude \
-  gcc-avr \
-  sdcc
+git ls-tree <release_hash> ec
 ```
+
+[firmware-open]: https://github.com/system76/firmware-open
+
+## Legal
+
+System76 EC is copyright System76 and contributors.
+
+System76 EC firmware is made available under the terms of the GNU General
+Public License, version 3. See [LICENSE](./LICENSE) for details.
+
+- firmware: GPL-3.0-only
+- ecflash: LGPL-2.1-or-later
+- ecsim: MIT
+- ectool: MIT
+
+Datasheets for the ITE embedded controllers used in System76 laptops cannot be
+shared outside of company. (However, the IT81202E datasheet is [publicly
+available][it81202e]. While it uses a different core, a significant portion of
+the register information is the same as IT85878E/IT5570E.)
+
+[it81202e]: https://www.ite.com.tw/en/product/view?mid=149

doc/flashing.md

@@ -1,33 +0,0 @@
-# Flashing firmware
-
-## Internal programmer
-
-Use this method for flashing a system already running System76 EC.
-
-This will trigger a watchdog reset causing the system to immediately power off.
-Save and close all applications before flashing.
-
-```
-make BOARD=<vendor>/<model> flash_internal
-```
-
-## External programmer
-
-Use this method for first-time flashing or flashing a bricked controller.
-
-[A Mega 2560 is required for flashing.](./mega2560.md)
-
-**The system must not have any power!**
-
-1. Turn off the computer
-2. Unplug the AC adapter
-3. Remove the bottom panel
-4. Disconnect the battery
-5. Ground the laptop to the programmer
-6. Disconnect the keyboard from its port
-7. Attach the programmer to the keyboard port
-8. Flash the firmware
-
-```
-make BOARD=<vendor>/<model> flash_external
-```

doc/keyboard-layout-customization.md

@@ -1,46 +0,0 @@
-# Keyboard layout customization
-
-## Dependencies
-* Dependencies are listed in the README file for the EC project.
-
-## Adding your layout
-* In `src/board/system76/{your-model}/keymap/`, copy `default.c` and rename it.
-  There are two examples to reference in the `lemp9` directory: `jeremy.c` and 
-  `levi.c`.
-* In `src/common/include/common/keymap.h` you will find a list of the key
-  definitions.
-* You will notice two sets of keys in these layout files. The top one is the 
-  standard mapping. The bottom one is the Fn layer, meaning it is active when
-  the Fn key is being held. If you look at the Fn layer in the `levi.c` layout,
-  you will see that there are arrow keys at WASD, media and volume keys on the
-  bottom row, etc. 
-* Hint: To avoid losing your place change one key at a time, referencing the key
-  code you are deleting to keep yourself positioned correctly in the list of
-  keycodes.
-
-## Configure your EC to build with your layout
-* Create a file in the project's root directory called `config.mk` and add your
-  board and keyboard layout to it. For example, if you want to build lemp9
-  firmware with Jeremy's layout (which is at 
-  `ec/src/board/system76/lemp9/keymap/jeremy.c`):
-```
-BOARD?=system76/lemp9
-KEYMAP?=jeremy
-```
-
-## Test build your EC
-* From the `ec` directory, run `make` to make sure it builds correctly.
-
-## Flash your EC
-* If the test build went well, you should be ready to flash your EC:
-  - Close all running applications.
-  - Unplug everything from your laptop except the charger.
-  - Flash with `make flash_internal`
-  - When it says, "Waiting 5 seconds for all keys to be released", it is
-    important to not touch the keyboard or trackpad until it finishes writing
-    the new EC and turns itself off. 
-  - Once it shuts down, you can power it back on, and your keymap will be
-    active. 
-  - If you changed your layout in such a way that you can't easily type, just
-    plug in a USB keyboard and re-flash to the default layout until you can
-    fix. The USB keyboard's layout will be unaffected.

docs/SUMMARY.md

@@ -0,0 +1,10 @@
+# Summary
+
+- [Index](./index.md)
+- [Development environment](./dev-env.md)
+- [Adding a new board](./adding-a-new-board.md)
+- [Supported controllers](./controllers.md)
+- [Debugging](./debugging.md)
+- [Flashing](./flashing.md)
+- [Custom keyboard layouts](./keyboard-layout-customization.md)
+- [Mega2560](./mega2560.md)

docs/adding-a-new-board.md

@@ -2,7 +2,9 @@
 
 ## Charger parameters
 
-- `CHARGER_CHARGE_CURRENT`: Currently the same for all boards (1536).
+- `CHARGER_ADAPTER_RSENSE`: The adapter RSENSE value in milliohms.
+- `CHARGER_BATTERY_RSENSE`: The battery RSENSE value in milliohms.
+- `CHARGER_CHARGE_CURRENT`: The desired charge current in milliamps.
 - `CHARGER_CHARGE_VOLTAGE`: On the battery, look for 充电限制电压 (charge limit
   voltage). Convert this from volts to millivolts.
 - `CHARGER_INPUT_CURRENT`: On the charger, look for DC output. Convert the
@@ -10,23 +12,28 @@
 
 #### Example
 
-The gaze15 battery has
+The gaze15 battery has:
 
 ```
 充电限制电压: 16.8Vdc
 ```
 
-and its charger has
+Its charger has:
 
 ```
 DC OUTPUT (输出/輸出): 19.5V⎓9.23A 180W
 ```
 
-This gives
+The schematics show it uses a 0.005 ohm sense resistor for both the adapter and
+the battery.
+
+This gives:
 
 ```
 CFLAGS+=\
-	-DCHARGER_CHARGE_CURRENT=1536 \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=5 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=16800 \
 	-DCHARGER_INPUT_CURRENT=9230
 ```

docs/book.toml

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+[book]
+title = "System76 EC"
+description = "System76 EC documentation"
+language = "en"
+src = "."
+
+[build]
+build-dir = "../build/docs"
+create-missing = false
+
+[output.html]
+default-theme = "rust"
+preferred-dark-theme = "coal"
+no-section-label = true
+git-repository-url = "https://github.com/system76/ec"
+
+[output.html.print]
+enable = false

docs/debugging.md

@@ -5,7 +5,25 @@ Terms used:
 - *host*: The system that will have all devices connected to it and
     will receive the EC logs
 
-## Parallel port
+## Debugging with target device
+
+1. Install dependencies
+    ```bash
+    ./scripts/deps.sh
+    ```
+1. Start the console
+    ```bash
+    make BOARD=system76/<model> console_internal
+    ```
+1. If you're not seeing seeing expected output, check the
+  [`LEVEL` cflag][level_cflag]. This is an EC compile time configuration and
+  changing will require a build and flash of the EC.
+
+[level_cflag]: https://github.com/system76/ec/blob/01907011bb63/src/board/system76/common/common.mk#L31-L39
+
+## Debugging with external device
+
+### Parallel port
 
 This method replaces the keyboard with a device used for debug logging.
 An alternate method of interacting with the target is needed; e.g., an
@@ -20,7 +38,7 @@ Requirements:
 For details on configuring the Mega 2560 and breakout board, see
 [mega2560](./mega2560.md).
 
-### Setup
+#### Setup
 
 1. Enable parallel port debugging in the EC firmware
     - Uncomment `PARALLEL_DEBUG` in `src/board/system76/common/common.mk`
@@ -46,12 +64,12 @@ To return the Mega 2560 to host mode, reset the device.
 
 If logs are corrupted, try power cycling the Mega or reseating the cable.
 
-## I2C connection
+### I2C connection
 
 **Failure to follow steps in order, or performing steps on an
 unsupported board, may result in damaged board components.**
 
-### Wiring the target
+#### Wiring the target
 
 The I2C connection is made through the battery pins. Find the pins marked
 `SMC_BAT` (clock) and `SMD_BAT` (data) in the service manual.
@@ -69,8 +87,10 @@ galp4       | 4         | 5
 gaze14      | 4         | 3
 gaze15      | 4         | 3
 lemp9       | 6         | 5
+lemp10      | 6         | 5
 oryp5       | 4         | 5
 oryp6       | 6         | 5
+oryp7       | 6         | 5
 
 1. Power off system
 2. Unplug AC adapter
@@ -84,7 +104,7 @@ oryp6       | 6         | 5
 9. Reconnect battery
 10. Replace bottom panel
 
-### Setup
+#### Setup
 
 Requirements:
 - Target wired for EC debugging

docs/dev-env.md

@@ -0,0 +1,53 @@
+# Development environment
+
+## OS
+
+Linux is the only supported environment. Development is possible on a variety
+of distros. It is recommended to use the latest Pop!\_OS or Ubuntu release.
+
+The build server uses Ubuntu 20.04.
+
+## IDE/Editor
+
+Any editor that has support for [EditorConfig] may be used.
+
+No specific IDE or editor is required or recommended.
+
+## Toolset
+
+EC development depends on using distro-provided packages for the most of the
+toolset.
+
+A complete list of dependencies can be seen in `scripts/deps.sh`.
+
+### Cargo
+
+rustup manages the [Rust] toolchain, which includes cargo. Cargo is required
+for building the tools. It is the only part of the development toolset that is
+not installed through distro packages.
+
+### GNU Make
+
+[GNU Make] is used to automate the build process. It also provides targets for
+using ecflash (for flashing) and ectool (for console).
+
+### SDCC
+
+[SDCC] is the only practical open source toolset on Linux for targeting the
+8051 architecture (among others). It contains a collection of tools comparable
+to what you would expect from GCC for other development targets.
+
+SDCC contains language extensions to support the 8051 architecture. Refer to
+the [SDCC manual] for more information.
+
+Version 4.0.0 or newer should be used.
+
+**Note**: Fedora installs SDCC binaries to a non-standard location. Ensure that
+`PATH` includes `/usr/libexec/sdcc`.
+
+
+[EditorConfig]: https://editorconfig.org/
+[GNU Make]: https://www.gnu.org/software/make/
+[Rust]: https://www.rust-lang.org/
+[SDCC manual]: http://sdcc.sourceforge.net/doc/sdccman.pdf
+[SDCC]: http://sdcc.sourceforge.net/

docs/flashing.md

@@ -0,0 +1,76 @@
+# Flashing firmware
+
+## UEFI application
+
+The `flash.sh` script from the top-level firmware-open project will use
+firmware-update, the UEFI application which is used for normal system updates.
+
+This will flash both the SBIOS and the EC after building the firmware. To
+flash just the EC, delete the built `firmware.rom` before running `flash.sh`.
+
+## Internal programmer
+
+Use this method for flashing a system already running System76 EC.
+
+This method will only work if the running firmware is not locked. Firmware is
+write locked if it was built with `CONFIG_SECURITY=y`. The firmware can be
+unlocked using ectool for a single boot:
+
+```
+./scripts/ectool.sh security unlock
+```
+
+This method will trigger a watchdog reset causing the system to **immediately
+power off**. OS data may be lost or corrupted as a result. Save and close all
+applications before flashing.
+
+```
+make BOARD=<vendor>/<model> flash_internal
+```
+
+## External programmer
+
+Use this method for:
+
+- flashing from proprietary firmware to System76 EC firmware
+- flashing without risking loss of OS data
+- flashing a bricked controller
+
+This requires:
+
+- [A configured Mega 2560](./mega2560.md): For programming the EC itself
+- A USB cable: For creating a common ground and providing power
+    - USB-C is recommended, but USB-A will work as well
+- A second computer: For building and flashing the firmware
+
+**The system must not have any power!**
+
+1. Turn off the laptop
+2. Unplug the AC adapter
+3. Remove the bottom panel
+4. Disconnect the battery
+5. Disconnect the keyboard from its port
+6. Replace the bottom panel and flip the laptop back over
+7. Connect the USB cable from the laptop to the host machine
+8. Connect the Mega 2560 to the host machine
+9. Attach the programmer to the keyboard port
+10. Flash the firmware
+
+```
+make BOARD=<vendor>/<model> flash_external
+```
+
+One of the first things it does is read the EC ID and version. If working, the
+ID will be the EC model the machine uses.
+
+```
+ID: 5570 VER: 2
+ID: 8587 VER: 6
+```
+
+Any other values means that the Mega 2560 is misconfigured or the FPC is not
+seated correctly. E.g., this is wrong:
+
+```
+ID: FF7F VER: 127
+```

docs/keyboard-layout-customization.md

@@ -0,0 +1,118 @@
+# Keyboard layout customization
+
+System76 EC firmware suppports using custom keyboard layouts. For example,
+having the physical "Caps Lock" key function as "Escape" when pressed.
+
+This only applies to the internal keyboard. External keyboards are not
+affected.
+
+Advanced functionality, such as macros or QMK's Mod-Tap, are not supported.
+
+You must be able to build and flash firmware. See the [README](../README.md)
+if you have not built the firmware before.
+
+## Firmware version
+
+To ensure compatibility with other system components (e.g. your current BIOS
+version), it's recommended to flash the same firmware version as you're
+currently using.
+
+Determine the BIOS version using dmidecode. The BIOS version is formatted as
+`<date>_<revision>`.
+
+```sh
+sudo dmidecode -t bios | grep Version
+```
+
+From the [firmware-open](https://github.com/system76/firmware-open) repo,
+determine the EC commit used for the BIOS version.
+
+```sh
+git ls-tree <bios_rev> ec
+```
+
+Checkout that commit in the EC repo and update the submodules.
+
+```sh
+git checkout <ec_rev>
+git submodule update --recursive
+```
+
+## Adding a layout file
+
+Determine the keyboard used for your model.
+
+```sh
+grep KEYBOARD src/board/system76/<model>/board.mk
+```
+
+Copy the default layout file for the keyboard to a separate file in the keymap
+directory.
+
+```sh
+cp src/keyboard/system76/<keyboard>/keymap/default.c src/keyboard/system76/<keyboard>/keymap/<custom>.c
+```
+
+The name of the keymap can be anything. Following QMK convention, the file name
+could be your username.
+
+## Modifying the layout
+
+A keymap file is a C file that defines the position of key and its function.
+Only the `LAYOUT`s should be modified.
+
+There are 2 layers in a keymap file.
+
+- `KEYMAP[0]`: The first `LAYOUT` defines the default layer
+- `KEYMAP[1]`: The second `LAYOUT` defines the function layer
+
+A `KT_FN` key must be assigned on the first layer in order to access the second
+layer. The `KT_FN` key must be held to use keys on the second layer.
+
+Change one key at a time to avoid losing your place.
+
+Some related files are:
+
+- `src/common/include/common/keymap.h`: Defines the key scancodes
+- `src/keyboard/system76/<keyboard>/include/board/keymap.h`: Defines the
+    keyboard matrix
+
+## Building with the new layout
+
+Build the firmware specifying the `KEYMAP` you have added.
+
+```sh
+make BOARD=system76/lemp9 KEYMAP=custom
+```
+
+Use a config file to simplify this. In the EC project's root directory, create
+a file named `config.mk`. Define the `BOARD` and `KEYMAP` variables.
+
+```mk
+BOARD?=system76/lemp9
+KEYMAP?=custom
+```
+
+Then building the firmware only requires calling make.
+
+```sh
+# Make will read config.mk to determine which board and keymap to use.
+make
+```
+
+## Flashing the new firmware
+
+See [flashing firmware](./flashing.md) for details.
+
+Do not use the keyboard or touchpad while it is flashing.
+
+The system will power off as part of the flash process. Turn it back on after
+it has powered off.
+
+The keyboard can now be used with your new layout.
+
+## Troubleshooting
+
+If your layout does not work as you intended, only the internal keyboard will
+be affected. An external USB keyboard or SSH session can be used to correct the
+layout and reflash the firmware.

docs/mega2560.md

@@ -18,7 +18,7 @@ it uses the ATmega16U2, find a different model.
 A flexible printed circuit (FPC) breakout board is required. It should have:
 
 - 24 pins with 0.1" (2.54mm) pitch
-- One side with 0.5mm pitch FPC connector (for lemp9)
+- One side with 0.5mm pitch FPC connector (for lemp9, lemp10, lemp11, galp5, and galp6)
 - One side with 1.0mm pitch FPC connector (for all other models)
 
 Depending on the vendor, the connectors may not come soldered to the board (or

docs/security.md

@@ -0,0 +1,13 @@
+# Firmware security
+
+The firmware security feature can be configured by setting `CONFIG_SECURITY=1`
+in the `src/board/system76/[board]/board.mk` file. This feature prevents
+programming the EC firmware at runtime, unless the EC is unlocked with the
+`system76-ectool security unlock` command. After this, on the next reboot, the
+EC will respond to the SPI and reset commands. On boards where the `ME_WE` GPIO
+exists, it will be set high when the EC security state is unlocked.
+
+Other firmware components can use this state to perform their own locking and
+unlocking primitives. For example, in `coreboot`, flash regions may be locked
+when the EC security state is locked. In `EDK2`, a physical presence dialog may
+be shown when the EC security state is unlocked.

ectool.sh

@@ -1,5 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-cargo build --release --manifest-path tool/Cargo.toml
-sudo tool/target/release/system76_ectool "$@"

layouts.sh

@@ -1,65 +0,0 @@
-#!/usr/bin/env bash
-# SPDX-License-Identifier: GPL-3.0-only
-# This script produces layout data for the System76 Keyboard Configurator
-
-set -e
-
-rm -rf build/layouts
-mkdir -p build/layouts
-D="$(realpath build/layouts)"
-
-binary="$D/keymap"
-source="$binary.c"
-header="src/common/include/common/keymap.h"
-echo "#include <stdio.h>" > "$source"
-echo "#include \"$header\"" >> "$source"
-echo "int main(int argc, char **argv) {" >> "$source"
-grep '^#define \(K_\|KT_FN\)' "$header" \
-| cut -d ' ' -f2 \
-| while read keycode
-do
-	name="$(echo "$keycode" | cut -d '_' -f2-)"
-	echo "printf(\"${name},0x%04X\\n\", $keycode);" >> "$source"
-done
-echo "return 0;" >> "$source"
-echo "}" >> "$source"
-gcc -I. "$source" -o "$binary"
-"$binary" | tee "$D/keymap.csv"
-
-cd src/board
-for board in */*
-do
-	file="$board/include/board/keymap.h"
-	if [ ! -e "$file" ]
-	then
-		continue
-	fi
-	echo "# $board"
-	mkdir -p "$D/$board"
-	cp "$D/keymap.csv" "$D/$board"
-	row=0
-	rg \
-		--multiline \
-		--multiline-dotall \
-		--regexp '#define LAYOUT\(.*\) \{.*\}' \
-		"$file" \
-	| grep --only-matching '\{.*\}' \
-	| sed 's/^{ //' \
-	| sed 's/ }$//' \
-	| sed 's/, / /g' \
-	| while read line
-	do
-		col=0
-		for word in $line
-		do
-			if [ "$word" != "___" ]
-			then
-				echo "$word,$row,$col"
-			fi
-			col=$(expr $col + 1)
-		done
-		row=$(expr $row + 1)
-	done \
-	| sort -n \
-	| tee "$D/${board}/layout.csv"
-done

rust-toolchain

@@ -1 +0,0 @@
-nightly-2020-07-27

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "nightly-2024-05-11"
+components = ["clippy", "rustfmt"]
+profile = "minimal"

scripts/coccinelle/bit-macro.cocci

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// Replace shifts with BIT macro
+
+@@ expression val; @@
+-(1 << val)
++BIT(val)
+
+@@ expression val; @@
+-(1U << val)
++BIT(val)
+
+@@ expression val; @@
+-1 << val
++BIT(val)

scripts/coccinelle/macros.h

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-only
+// SDCC extenstions that need to be defined away for spatch
+
+#define __at(x)
+#define __code
+#define __critical
+#define __data
+#define __reentrant
+#define ___

scripts/deps.sh

@@ -0,0 +1,94 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+set -eE
+
+function msg {
+  echo -e "\x1B[1m$*\x1B[0m" >&2
+}
+
+trap 'msg "\x1B[31mFailed to install dependencies!"' ERR
+
+source /etc/os-release
+
+msg "Installing system build dependencies"
+if [[ "${ID}" =~ "debian" ]] || [[ "${ID_LIKE}" =~ "debian" ]]; then
+    sudo apt-get update
+    sudo apt-get install \
+        --no-install-recommends \
+        --yes \
+        avr-libc \
+        avrdude \
+        curl \
+        gcc \
+        gcc-avr \
+        libc-dev \
+        libhidapi-dev \
+        libudev-dev \
+        make \
+        pkgconf \
+        sdcc \
+        shellcheck \
+        uncrustify \
+        xxd
+elif [[ "${ID}" =~ "fedora" ]] || [[ "${ID_LIKE}" =~ "fedora" ]]; then
+    sudo dnf install \
+        --assumeyes \
+        avr-gcc \
+        avr-libc \
+        avrdude \
+        curl \
+        gcc \
+        make \
+        sdcc \
+        ShellCheck \
+        systemd-devel \
+        uncrustify \
+        vim-common
+elif [[ "${ID}" =~ "arch" ]] || [[ "${ID_LIKE}" =~ "arch" ]]; then
+    sudo pacman -S \
+        --noconfirm \
+        avr-gcc \
+        avr-libc \
+        avrdude \
+        curl \
+        gcc \
+        make \
+        pkgconf \
+        sdcc \
+        shellcheck \
+        systemd-libs \
+        uncrustify \
+        vim
+else
+    msg "Please add support for your distribution to:"
+    msg "scripts/deps.sh"
+    exit 1
+fi
+
+msg "Initializing submodules"
+git submodule update --init --recursive
+
+msg "Installing git hooks"
+make git-config
+
+RUSTUP_NEW_INSTALL=0
+if ! command -v rustup >/dev/null 2>&1; then
+    RUSTUP_NEW_INSTALL=1
+    msg "Installing Rust"
+    curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs \
+      | sh -s -- -y --default-toolchain none
+
+    msg "Loading Rust environment"
+    source "${HOME}/.cargo/env"
+fi
+
+msg "Installing pinned Rust toolchain and components"
+rustup show
+
+if [[ $RUSTUP_NEW_INSTALL = 1 ]]; then
+    msg "rustup was just installed. Ensure cargo is on the PATH with:"
+    echo -e "    source ~/.cargo/env\n"
+fi
+
+msg "\x1B[32mSuccessfully installed dependencies"

scripts/ectool.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+set -e
+cargo build --release --quiet --manifest-path tool/Cargo.toml
+sudo tool/target/release/system76_ectool "$@"

scripts/hooks/pre-commit.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+make lint 2>/dev/null || {
+    echo -e "\nissues found, not committing"
+    exit 1
+}

scripts/lint/01-spdx-tags.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+# Check that all files have a SPDX license identifier
+# TODO: Validate license tags against a whitelist
+
+LINT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
+. "$LINT_DIR/util.sh"
+
+echo -n "Checking for SPDX tags..."
+
+EXCLUDES=(
+    # Ignore license files
+    ':!:LICENSE'
+    ':!:**/LICENSE'
+    # Ignore cargo files
+    ':!:**/Cargo.lock'
+    ':!:**/Cargo.toml'
+    ':!:rust-toolchain.toml'
+    # Ignore text files
+    ':!:*.md'
+    ':!:*.txt'
+    # Ignore dotfiles
+    ':!:\.*'
+    ':!:**/\.*'
+)
+
+needs_tag=()
+
+for file in $(git ls-files "${EXCLUDES[@]}"); do
+    # Only check regular files
+    if [[ ! -f "$file" ]]; then
+        continue
+    fi
+
+    # SPDX must appear at head of file
+    if ! head "$file" | grep -q 'SPDX-License-Identifier:'; then
+        needs_tag+=("$file")
+    fi
+done
+
+if [[ "${#needs_tag[@]}" != "0" ]]; then
+    failed
+
+    for file in "${needs_tag[@]}"; do
+        echo "- $file"
+    done
+
+    exit 1
+fi
+
+passed

scripts/lint/02-uncrustify.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+# Check if any C files or headers need to be formatted.
+
+# shellcheck disable=SC1091
+
+LINT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
+. "$LINT_DIR/util.sh"
+
+echo -n "Checking C style..."
+
+if ! command -v uncrustify > /dev/null; then
+    skipped "uncrustify not found"
+    exit 0
+fi
+
+needs_formatting=()
+
+for file in $(git ls-files '*.c' '*.h'); do
+    if ! uncrustify -c .uncrustify.cfg -q --check "$file" >/dev/null 2>&1; then
+        needs_formatting+=("$file")
+    fi
+done
+
+if [[ "${#needs_formatting[@]}" != "0" ]]; then
+    failed
+
+    for file in "${needs_formatting[@]}"; do
+        echo "- $file"
+    done
+
+    exit 1
+fi
+
+passed

scripts/lint/03-shellcheck.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+# Check if any shell scripts have issues.
+
+LINT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
+. "$LINT_DIR/util.sh"
+
+echo -n "Checking shell scripts..."
+
+if ! command -v shellcheck > /dev/null; then
+    skipped "shellcheck not found"
+    exit 0
+fi
+
+readarray -t FILES < <(git ls-files '*.sh')
+needs_formatting=()
+
+for file in "${FILES[@]}"; do
+    # SC1091: Ignore external scripts
+    if ! shellcheck -f quiet --exclude=SC1091 "$file"; then
+        needs_formatting+=("$file")
+    fi
+done
+
+if [[ "${#needs_formatting[@]}" != "0" ]]; then
+    failed
+
+    for file in "${needs_formatting[@]}"; do
+        echo "- $file"
+    done
+
+    exit 1
+fi
+
+passed

scripts/lint/lint.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+# Run all lints.
+
+LINT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
+LINTS=$(find "$LINT_DIR" -type f -name "[0-9][0-9]-*" | sort)
+FAILED=0
+
+for lint in $LINTS; do
+    $lint || FAILED=1
+done
+
+[[ "$FAILED" = "0" ]] || exit 1

scripts/lint/util.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+passed() {
+    echo -e "\x1B[32mPASSED\x1B[0m"
+}
+
+skipped() {
+    local reason=$1
+    echo -e "\x1B[33mSKIPPED\x1B[0m ($reason)"
+}
+
+failed() {
+    echo -e "\x1B[31mFAILED\x1B[0m"
+}

scripts/power.sh

@@ -1,9 +1,16 @@
 #!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
 
 set -e
 
+has_bat=0
+if [ -d /sys/class/power_supply/BAT0/ ]
+then
+    has_bat=1
+fi
+
 has_ec=0
-if ./ectool.sh info 2> /dev/null
+if ./scripts/ectool.sh info 2> /dev/null
 then
     has_ec=1
 fi
@@ -27,7 +34,10 @@ do
     if [ "${header}" == "1" ]
     then
         F="Time    "
-        F="${F}\tBAT W"
+        if [ "${has_bat}" == "1" ]
+        then
+            F="${F}\tBAT W"
+        fi
         F="${F}\tCPU W"
         F="${F}\tCPU PL1"
         F="${F}\tCPU PL2"
@@ -50,25 +60,28 @@ do
     else
         F="$(date "+%T")"
 
-        last_E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
+        last_E="$(sudo cat '/sys/class/powercap/intel-rapl:0/energy_uj')"
         sleep 1
 
-        uV="$(cat /sys/class/power_supply/BAT0/voltage_now)"
-        V="$(echo "${uV}/1000000" | bc -lq)"
-        uA="$(cat /sys/class/power_supply/BAT0/current_now)"
-        A="$(echo "${uA}/1000000" | bc -lq)"
-        bat_W="$(echo "${V} * ${A}" | bc -lq)"
-        F="${F}\t$(printf "%.2f" "${bat_W}")"
+        if [ "${has_bat}" == "1" ]
+        then
+            uV="$(cat /sys/class/power_supply/BAT0/voltage_now)"
+            V="$(echo "${uV}/1000000" | bc -lq)"
+            uA="$(cat /sys/class/power_supply/BAT0/current_now)"
+            A="$(echo "${uA}/1000000" | bc -lq)"
+            bat_W="$(echo "${V} * ${A}" | bc -lq)"
+            F="${F}\t$(printf "%.2f" "${bat_W}")"
+        fi
 
-        E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
+        E="$(sudo cat '/sys/class/powercap/intel-rapl:0/energy_uj')"
         W="$(echo "(${E} - ${last_E})/1000000" | bc -lq)"
         F="${F}\t$(printf "%.1f" "${W}")"
 
-        PL1_uW="$(cat /sys/class/powercap/intel-rapl\:0/constraint_0_power_limit_uw)"
+        PL1_uW="$(sudo cat '/sys/class/powercap/intel-rapl:0/constraint_0_power_limit_uw')"
         PL1_W="$(echo "${PL1_uW}/1000000" | bc -lq)"
         F="${F}\t$(printf "%.1f" "${PL1_W}")"
 
-        PL2_uW="$(cat /sys/class/powercap/intel-rapl\:0/constraint_1_power_limit_uw)"
+        PL2_uW="$(sudo cat '/sys/class/powercap/intel-rapl:0/constraint_1_power_limit_uw')"
         PL2_W="$(echo "${PL2_uW}/1000000" | bc -lq)"
         F="${F}\t$(printf "%.1f" "${PL2_W}")"
 

scripts/spatch.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-only
+
+spatch \
+    --sp-file ./scripts/coccinelle/bit-macro.cocci \
+    --macro-file ./scripts/coccinelle/macros.h \
+    --no-includes \
+    --include-headers \
+    --preprocess \
+    --in-place \
+    --dir src/

src/arch/8051/arch.mk

@@ -1,27 +1,5 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-CC=sdcc -mmcs51 --model-large --code-size $(CODE_SIZE) --xram-size $(SRAM_SIZE) --Werror
-OBJ=$(patsubst src/%.c,$(BUILD)/%.rel,$(SRC))
-
-# Run EC rom in simulator
-sim: $(BUILD)/ec.rom
-	cargo run \
-		--release \
-		--manifest-path ecsim/Cargo.toml \
-		--no-default-features \
-		-- $<
-
-# Convert from Intel Hex file to binary file
-$(BUILD)/ec.rom: $(BUILD)/ec.ihx
-	@mkdir -p $(@D)
-	makebin -s $(CODE_SIZE) -p < $< > $@
-
-# Link object files into Intel Hex file
-$(BUILD)/ec.ihx: $(OBJ)
-	@mkdir -p $(@D)
-	$(CC) $(LDFLAGS) -o $@ $^
-
-# Compile C files into object files
-$(OBJ): $(BUILD)/%.rel: src/%.c $(INCLUDE)
-	@mkdir -p $(@D)
-	$(CC) $(CFLAGS) -o $@ -c $<
+arch-y += arch.c
+arch-y += delay.c
+arch-y += time.c

src/arch/8051/delay.c

@@ -15,8 +15,8 @@ void delay_ticks(uint16_t ticks) {
 
     // Start timer in mode 1
     TMOD = (TMOD & 0x0F) | 0x10;
-    TH1 = (unsigned char)(value >> 8);
-    TL1 = (unsigned char)value;
+    TH1 = (uint8_t)(value >> 8);
+    TL1 = (uint8_t)value;
     TR1 = 1;
 
     // Wait until complete
@@ -24,8 +24,8 @@ void delay_ticks(uint16_t ticks) {
 }
 
 // This loops through delays of one ms in order to avoid overflow
-void delay_ms(int ms) {
-    for (int i = 0; i < ms; i++) {
+void delay_ms(uint8_t ms) {
+    for (uint8_t i = ms; i != 0; i--) {
         delay_us(1000);
     }
 }

src/arch/8051/include/arch/delay.h

@@ -9,14 +9,12 @@ void delay_ticks(uint16_t ticks);
 
 // 1 us * 9.2 MHz / 12 is 69/90
 // Warning: this will round to the nearest tick
-#define delay_us(X) \
-    delay_ticks((uint16_t)((((uint32_t)(X)) * 69UL + 89UL) / 90UL));
+#define delay_us(X) delay_ticks((uint16_t)((((uint32_t)(X)) * 69UL + 89UL) / 90UL));
 
 // 1 ns * 9.2 MHz / 12 is 69/90000
 // Warning: this will round to the nearest tick
-#define delay_ns(X) \
-    delay_ticks((uint16_t)((((uint32_t)(X)) * 69UL + 89999UL) / 90000UL));
-    
-void delay_ms(int ms);
+#define delay_ns(X) delay_ticks((uint16_t)((((uint32_t)(X)) * 69UL + 89999UL) / 90000UL));
+
+void delay_ms(uint8_t ms);
 
 #endif // _ARCH_DELAY_H

src/arch/8051/include/arch/time.h

@@ -5,7 +5,9 @@
 
 #include <stdint.h>
 
+typedef uint16_t systick_t;
+
 void time_init(void);
-uint32_t time_get(void);
+systick_t time_get(void);
 
 #endif // _ARCH_TIME_H

src/arch/8051/time.c

@@ -3,23 +3,34 @@
 // Uses timer 0 to keep track of global time
 
 #include <8051.h>
-
 #include <arch/time.h>
 
-static volatile uint32_t time_overflows = 0;
+#define OSC_DIVISOR 12
+#define TICK_INTERVAL_MS 1
+// Value to reload into the timer when the overflow interrupt is triggered.
+#define TIMER_RELOAD (0xFFFF - (TICK_INTERVAL_MS * (CONFIG_CLOCK_FREQ_KHZ / OSC_DIVISOR)))
+
+static volatile systick_t time_overflows = 0;
 
 void timer_0(void) __interrupt(1) {
+    // Hardware automatically clears the the interrupt
+
     // Stop timer
     TR0 = 0;
 
     time_overflows++;
 
-    // Start timer
-    TH0 = 0xFD;
-    TL0 = 0x01;
+    // Reload the values
+    TH0 = TIMER_RELOAD >> 8;
+    TL0 = TIMER_RELOAD & 0xFF;
+
+    // Restart the timer
     TR0 = 1;
 }
 
+/**
+ * Set up Timer 0 as the system tick.
+ */
 void time_init(void) __critical {
     // Stop the timer
     TR0 = 0;
@@ -27,17 +38,20 @@ void time_init(void) __critical {
 
     time_overflows = 0;
 
-    // Enable timer interrupts
+    // Enable the interrupt
     ET0 = 1;
 
-    // Start timer in mode 1
-    // (65536 - 64769) / (9.2 MHz / 12) = ~1 ms interval
+    // Set the timer to mode 1 (16-bit timer)
     TMOD = (TMOD & 0xF0) | 0x01;
-    TH0 = 0xFD;
-    TL0 = 0x01;
+
+    // Set the initial values
+    TH0 = TIMER_RELOAD >> 8;
+    TL0 = TIMER_RELOAD & 0xFF;
+
+    // Start the timer
     TR0 = 1;
 }
 
-uint32_t time_get(void) __critical {
+systick_t time_get(void) __critical {
     return time_overflows;
 }

src/arch/8051/toolchain.mk

@@ -0,0 +1,58 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+CC = sdcc -mmcs51 -MMD --model-large --code-size $(CODE_SIZE) --xram-size $(SRAM_SIZE) --Werror
+
+AS = sdas8051
+ASFLAGS = -plosgff
+
+# XXX: SDCC "requires" main() to be in the first item passed to the linker.
+# Ref: SDCC Manual 4.2.8; Section 3.2.3 Projects with Multiple Source Files
+MAIN_SRC = $(filter %/main.c, $(SRC))
+MAIN_OBJ = $(sort $(patsubst src/%.c, $(BUILD)/%.rel, $(MAIN_SRC)))
+
+# NOTE: sdas *must* be used for assembly files as sdcc cannot compile them
+# itself. They must use an extension of `.asm` so they can be filtered here.
+
+ASM_SRC = $(filter %.asm, $(SRC))
+ASM_OBJ = $(sort $(patsubst src/%.asm, $(BUILD)/%.rel, $(ASM_SRC)))
+
+C_SRC = $(filter %.c, $(SRC))
+C_OBJ = $(sort $(patsubst src/%.c, $(BUILD)/%.rel, $(C_SRC)))
+
+OBJ = $(MAIN_OBJ) $(sort $(ASM_OBJ) $(C_OBJ))
+
+# Run EC rom in simulator
+sim: $(BUILD)/ec.rom
+	cargo run \
+		--release \
+		--manifest-path ecsim/Cargo.toml \
+		--no-default-features \
+		-- $<
+
+# Convert from Intel Hex file to binary file
+$(BUILD)/ec.rom: $(BUILD)/ec.ihx
+	@echo "  OBJCOPY   $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	objcopy -I ihex -O binary --gap-fill=0xFF --pad-to=$(CONFIG_EC_FLASH_SIZE) $< $@
+
+# Link object files into Intel Hex file
+$(BUILD)/ec.ihx: $(OBJ)
+	@echo "  LINK      $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(CC) $(LDFLAGS) -o $@ $^
+
+# Compile ASM files into object files
+$(ASM_OBJ): $(BUILD)/%.rel: src/%.asm
+	@echo "  AS        $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(AS) $(ASFLAGS) $@ $<
+
+# Compile C files into object files
+$(C_OBJ): $(BUILD)/%.rel: src/%.c $(INCLUDE)
+	@echo "  CC        $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+# Add dependency rules
+DEP = $(OBJ:%.rel=%.d)
+-include $(DEP)

src/arch/avr/arch.mk

@@ -1,29 +1,6 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-CC=avr-gcc -mmcu=$(EC)
-CFLAGS+=-Os -fstack-usage -Wall -Werror -Wl,--gc-sections -Wl,-u,vfprintf -lprintf_flt
-OBJ=$(patsubst src/%.c,$(BUILD)/%.o,$(SRC))
-
-# Run EC rom in simulator
-sim: $(BUILD)/ec.elf
-	simavr $< --mcu $(EC)
-
-# Convert from Intel Hex file to binary file
-$(BUILD)/ec.rom: $(BUILD)/ec.ihx
-	@mkdir -p $(@D)
-	makebin -p < $< > $@
-
-# Convert from ELF file to Intel Hex file
-$(BUILD)/ec.ihx: $(BUILD)/ec.elf
-	@mkdir -p $(@D)
-	avr-objcopy -j .text -j .data -O ihex $< $@
-
-# Link object files into ELF file
-$(BUILD)/ec.elf: $(OBJ)
-	@mkdir -p $(@D)
-	$(CC) -o $@ $^
-
-# Compile C files into object files
-$(BUILD)/%.o: src/%.c $(INCLUDE)
-	@mkdir -p $(@D)
-	$(CC) $(CFLAGS) -o $@ -c $<
+arch-y += gpio.c
+arch-y += i2c.c
+arch-y += i2c_slave.c
+arch-y += uart.c

src/arch/avr/gpio.c

@@ -2,7 +2,7 @@
 
 #include <arch/gpio.h>
 
-bool gpio_get_dir(struct Gpio * gpio) {
+bool gpio_get_dir(const struct Gpio *const gpio) {
     if (*gpio->ddr & gpio->value) {
         return true;
     } else {
@@ -10,7 +10,7 @@ bool gpio_get_dir(struct Gpio * gpio) {
     }
 }
 
-void gpio_set_dir(struct Gpio * gpio, bool value) {
+void gpio_set_dir(struct Gpio *const gpio, bool value) {
     if (value) {
         *gpio->ddr |= gpio->value;
     } else {
@@ -18,7 +18,7 @@ void gpio_set_dir(struct Gpio * gpio, bool value) {
     }
 }
 
-bool gpio_get(struct Gpio * gpio) {
+bool gpio_get(const struct Gpio *const gpio) {
     if (*gpio->pin & gpio->value) {
         return true;
     } else {
@@ -26,7 +26,7 @@ bool gpio_get(struct Gpio * gpio) {
     }
 }
 
-void gpio_set(struct Gpio * gpio, bool value) {
+void gpio_set(struct Gpio *const gpio, bool value) {
     if (value) {
         *gpio->port |= gpio->value;
     } else {

src/arch/avr/i2c.c

@@ -6,81 +6,93 @@
 
 #include <board/cpu.h>
 #include <common/i2c.h>
+#include <common/macro.h>
 
-#define TIMEOUT (F_CPU/1000)
+#define TIMEOUT (F_CPU / 1000)
 
-int i2c_start(struct I2C * i2c, uint8_t addr, bool read) {
-	uint32_t count;
+int16_t i2c_start(struct I2C *const i2c, uint8_t addr, bool read) {
+    uint32_t count;
 
-	// reset TWI control register
-	TWCR = 0;
-	// transmit START condition
-	TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
-	// wait for end of transmission
-	count = TIMEOUT;
-	while(!(TWCR & (1<<TWINT)) && count > 0) count -= 1;
-	if (count == 0) return -1;
+    // reset TWI control register
+    TWCR = 0;
+    // transmit START condition
+    TWCR = BIT(TWINT) | BIT(TWSTA) | BIT(TWEN);
+    // wait for end of transmission
+    count = TIMEOUT;
+    while (!(TWCR & BIT(TWINT)) && count > 0)
+        count -= 1;
+    if (count == 0)
+        return -1;
 
-	// check if the start condition was successfully transmitted
-	if((TWSR & 0xF8) != TW_START) return -1;
+    // check if the start condition was successfully transmitted
+    if ((TWSR & 0xF8) != TW_START)
+        return -1;
 
-	// load slave addr into data register
-	TWDR = ((addr << 1) | read);
-	// start transmission of addr
-	TWCR = (1<<TWINT) | (1<<TWEN);
-	// wait for end of transmission
-	count = TIMEOUT;
-	while(!(TWCR & (1<<TWINT)) && count > 0) count -= 1;
-	if (count == 0) return -1;
+    // load slave addr into data register
+    TWDR = ((addr << 1) | read);
+    // start transmission of addr
+    TWCR = BIT(TWINT) | BIT(TWEN);
+    // wait for end of transmission
+    count = TIMEOUT;
+    while (!(TWCR & BIT(TWINT)) && count > 0)
+        count -= 1;
+    if (count == 0)
+        return -1;
 
-	// check if the device has acknowledged the READ / WRITE mode
-	uint8_t twst = TW_STATUS & 0xF8;
-	if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK)) return -1;
+    // check if the device has acknowledged the READ / WRITE mode
+    uint8_t twst = TW_STATUS;
+    if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK))
+        return -1;
 
-	return 0;
+    return 0;
 }
 
-void i2c_stop(struct I2C * i2c) {
-	// transmit STOP condition
-	TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
+void i2c_stop(struct I2C *const i2c) {
+    // transmit STOP condition
+    TWCR = BIT(TWINT) | BIT(TWEN) | BIT(TWSTO);
 }
 
-int i2c_write(struct I2C * i2c, uint8_t * data, int length) {
-	int i;
-	for (i = 0; i < length; i++) {
-		// load data into data register
-		TWDR = data[i];
-		// start transmission of data
-		TWCR = (1<<TWINT) | (1<<TWEN);
-		// wait for end of transmission
-		uint32_t count = TIMEOUT;
-		while(!(TWCR & (1<<TWINT)) && count > 0) count -= 1;
-		// timed out
-		if (count == 0) return -1;
-		// failed to receive ack
-		if((TWSR & 0xF8) != TW_MT_DATA_ACK) return -1;
-	}
+int16_t i2c_write(struct I2C *const i2c, const uint8_t *const data, uint16_t length) {
+    uint16_t i;
+    for (i = 0; i < length; i++) {
+        // load data into data register
+        TWDR = data[i];
+        // start transmission of data
+        TWCR = BIT(TWINT) | BIT(TWEN);
+        // wait for end of transmission
+        uint32_t count = TIMEOUT;
+        while (!(TWCR & BIT(TWINT)) && count > 0)
+            count -= 1;
+        // timed out
+        if (count == 0)
+            return -1;
+        // failed to receive ack
+        if ((TWSR & 0xF8) != TW_MT_DATA_ACK)
+            return -1;
+    }
 
-	return i;
+    return i;
 }
 
-int i2c_read(struct I2C * i2c, uint8_t * data, int length) {
-	int i;
-	for (i = 0; i < length; i++) {
-	    if ((i + 1) < length) {
-	    	// start TWI module and acknowledge data after reception
-	    	TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWEA);
-	    } else {
-	        // start receiving without acknowledging reception
-	    	TWCR = (1<<TWINT) | (1<<TWEN);
-	    }
-		// wait for end of transmission
-		uint32_t count = TIMEOUT;
-		while(!(TWCR & (1<<TWINT)) && count > 0) count -= 1;
-		if (count == 0) return -1;
-		// return received data from TWDR
-		data[i] = TWDR;
-	}
+int16_t i2c_read(struct I2C *const i2c, uint8_t *const data, uint16_t length) {
+    uint16_t i;
+    for (i = 0; i < length; i++) {
+        if ((i + 1) < length) {
+            // start TWI module and acknowledge data after reception
+            TWCR = BIT(TWINT) | BIT(TWEN) | BIT(TWEA);
+        } else {
+            // start receiving without acknowledging reception
+            TWCR = BIT(TWINT) | BIT(TWEN);
+        }
+        // wait for end of transmission
+        uint32_t count = TIMEOUT;
+        while (!(TWCR & BIT(TWINT)) && count > 0)
+            count -= 1;
+        if (count == 0)
+            return -1;
+        // return received data from TWDR
+        data[i] = TWDR;
+    }
 
-	return i;
+    return i;
 }

src/arch/avr/i2c_slave.c

@@ -9,81 +9,89 @@
 
 #include <board/cpu.h>
 #include <arch/i2c_slave.h>
+#include <common/macro.h>
 
-static void (* volatile i2c_slave_new_cb)() = NULL;
-static void (* volatile i2c_slave_recv_cb)(uint8_t) = NULL;
-static uint8_t (* volatile i2c_slave_send_cb)() = NULL;
+// uncrustify:off
+static void (*volatile i2c_slave_new_cb)() = NULL;
+static void (*volatile i2c_slave_recv_cb)(uint8_t) = NULL;
+static uint8_t (*volatile i2c_slave_send_cb)() = NULL;
+// uncrustify:on
 
-void i2c_slave_init(uint8_t address, void (*new_cb)(), void (*recv_cb)(uint8_t), uint8_t (*send_cb)()){
-	// ensure correct behavior by stopping before changing callbacks or address
-	i2c_slave_stop();
+void i2c_slave_init(
+    uint8_t address,
+    void (*new_cb)(),
+    void (*recv_cb)(uint8_t),
+    uint8_t (*send_cb)()
+) {
+    // ensure correct behavior by stopping before changing callbacks or address
+    i2c_slave_stop();
 
-	// clear interrupts
-	cli();
+    // clear interrupts
+    cli();
 
-	// setup callbacks
-	i2c_slave_new_cb = new_cb;
-	i2c_slave_recv_cb = recv_cb;
-	i2c_slave_send_cb = send_cb;
-	// load address into TWI address register
-	TWAR = (address << 1);
-	// set the TWCR to enable address matching and enable TWI, clear TWINT, enable TWI interrupt
-	TWCR = (1<<TWIE) | (1<<TWEA) | (1<<TWINT) | (1<<TWEN);
+    // setup callbacks
+    i2c_slave_new_cb = new_cb;
+    i2c_slave_recv_cb = recv_cb;
+    i2c_slave_send_cb = send_cb;
+    // load address into TWI address register
+    TWAR = (address << 1);
+    // set the TWCR to enable address matching and enable TWI, clear TWINT, enable TWI interrupt
+    TWCR = BIT(TWIE) | BIT(TWEA) | BIT(TWINT) | BIT(TWEN);
 
-	// set interrupts
-	sei();
+    // set interrupts
+    sei();
 }
 
-void i2c_slave_stop(){
-	// clear interrupts
-	cli();
+void i2c_slave_stop(void) {
+    // clear interrupts
+    cli();
 
-	// clear acknowledge and enable bits
-	TWCR &= ~((1<<TWEA) | (1<<TWEN));
-	// clear address
-	TWAR = 0;
-	// remove callbacks
-	i2c_slave_new_cb = NULL;
-	i2c_slave_recv_cb = NULL;
-	i2c_slave_send_cb = NULL;
+    // clear acknowledge and enable bits
+    TWCR &= ~(BIT(TWEA) | BIT(TWEN));
+    // clear address
+    TWAR = 0;
+    // remove callbacks
+    i2c_slave_new_cb = NULL;
+    i2c_slave_recv_cb = NULL;
+    i2c_slave_send_cb = NULL;
 
-	// set interrupts
-	sei();
+    // set interrupts
+    sei();
 }
 
 ISR(TWI_vect) {
-	uint8_t status = TW_STATUS;
-	switch(status) {
-	case TW_SR_SLA_ACK:
-		// master has started a new transaction, call the new callback
-		if (i2c_slave_new_cb != NULL) {
-			i2c_slave_new_cb();
-		}
-		TWCR = (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
-		break;
-	case TW_SR_DATA_ACK:
-		// received data from master, call the receive callback
-		if(i2c_slave_send_cb != NULL){
-			i2c_slave_recv_cb(TWDR);
-		}
-		TWCR = (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
-		break;
-	case TW_ST_SLA_ACK:
-	case TW_ST_DATA_ACK:
-		// master is requesting data, call the send callback
-		if(i2c_slave_recv_cb != NULL) {
-			TWDR = i2c_slave_send_cb();
-		}
-		TWCR = (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
-		break;
-	case TW_BUS_ERROR:
-		// some sort of erroneous state, prepare TWI to be readdressed
-		printf("TWI_vect bus error\n");
-		TWCR = 0;
-		TWCR = (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
-		break;
-	default:
-		TWCR = (1<<TWIE) | (1<<TWINT) | (1<<TWEA) | (1<<TWEN);
-		break;
-	}
+    uint8_t status = TW_STATUS;
+    switch (status) {
+    case TW_SR_SLA_ACK:
+        // master has started a new transaction, call the new callback
+        if (i2c_slave_new_cb != NULL) {
+            i2c_slave_new_cb();
+        }
+        TWCR = BIT(TWIE) | BIT(TWINT) | BIT(TWEA) | BIT(TWEN);
+        break;
+    case TW_SR_DATA_ACK:
+        // received data from master, call the receive callback
+        if (i2c_slave_send_cb != NULL) {
+            i2c_slave_recv_cb(TWDR);
+        }
+        TWCR = BIT(TWIE) | BIT(TWINT) | BIT(TWEA) | BIT(TWEN);
+        break;
+    case TW_ST_SLA_ACK:
+    case TW_ST_DATA_ACK:
+        // master is requesting data, call the send callback
+        if (i2c_slave_recv_cb != NULL) {
+            TWDR = i2c_slave_send_cb();
+        }
+        TWCR = BIT(TWIE) | BIT(TWINT) | BIT(TWEA) | BIT(TWEN);
+        break;
+    case TW_BUS_ERROR:
+        // some sort of erroneous state, prepare TWI to be readdressed
+        printf("TWI_vect bus error\n");
+        TWCR = 0;
+        TWCR = BIT(TWIE) | BIT(TWINT) | BIT(TWEA) | BIT(TWEN);
+        break;
+    default:
+        TWCR = BIT(TWIE) | BIT(TWINT) | BIT(TWEA) | BIT(TWEN);
+        break;
+    }
 }

src/arch/avr/include/arch/gpio.h

@@ -3,14 +3,16 @@
 #ifndef _ARCH_GPIO_H
 #define _ARCH_GPIO_H
 
+#include <common/macro.h>
+
 #include <avr/io.h>
 #include <stdbool.h>
 #include <stdint.h>
 
 struct Gpio {
-    volatile uint8_t * pin;
-    volatile uint8_t * ddr;
-    volatile uint8_t * port;
+    volatile uint8_t *pin;
+    volatile uint8_t *ddr;
+    volatile uint8_t *port;
     uint8_t value;
 };
 
@@ -18,12 +20,12 @@ struct Gpio {
     .pin = &PIN ## BLOCK, \
     .ddr = &DDR ## BLOCK, \
     .port = &PORT ## BLOCK, \
-    .value = (1 << NUMBER), \
+    .value = BIT(NUMBER), \
 }
 
-bool gpio_get(struct Gpio * gpio);
-void gpio_set(struct Gpio * gpio, bool value);
-bool gpio_get_dir(struct Gpio * gpio);
-void gpio_set_dir(struct Gpio * gpio, bool value);
+bool gpio_get(const struct Gpio *const gpio);
+void gpio_set(struct Gpio *const gpio, bool value);
+bool gpio_get_dir(const struct Gpio *const gpio);
+void gpio_set_dir(struct Gpio *const gpio, bool value);
 
 #endif // _ARCH_GPIO_H

src/arch/avr/include/arch/i2c_slave.h

@@ -3,7 +3,12 @@
 #ifndef _ARCH_I2C_SLAVE_H
 #define _ARCH_I2C_SLAVE_H
 
-void i2c_slave_init(uint8_t address, void (*new_cb)(), void (*recv_cb)(uint8_t), uint8_t (*send_cb)());
-void i2c_slave_stop();
+void i2c_slave_init(
+    uint8_t address,
+    void (*new_cb)(),
+    void (*recv_cb)(uint8_t),
+    uint8_t (*send_cb)()
+);
+void i2c_slave_stop(void);
 
 #endif // _ARCH_I2C_SLAVE_H

src/arch/avr/include/arch/uart.h

@@ -6,12 +6,12 @@
 #include <stdint.h>
 
 struct Uart {
-    volatile uint8_t * a;
-    volatile uint8_t * b;
-    volatile uint8_t * c;
-    volatile uint8_t * data;
-    volatile uint8_t * baud_l;
-    volatile uint8_t * baud_h;
+    volatile uint8_t *a;
+    volatile uint8_t *b;
+    volatile uint8_t *c;
+    volatile uint8_t *data;
+    volatile uint8_t *baud_l;
+    volatile uint8_t *baud_h;
     uint8_t a_read;
     uint8_t a_write;
     uint8_t a_init;
@@ -19,18 +19,18 @@ struct Uart {
     uint8_t c_init;
 };
 
-void uart_init(struct Uart * uart, unsigned long baud);
+void uart_init(struct Uart *const uart, uint32_t baud);
 
-int uart_count();
-struct Uart * uart_new(int num);
+int16_t uart_count(void);
+struct Uart *uart_new(int16_t num);
 
-unsigned char uart_can_read(struct Uart * uart);
-unsigned char uart_can_write(struct Uart * uart);
+uint8_t uart_can_read(struct Uart *const uart);
+uint8_t uart_can_write(struct Uart *const uart);
 
-unsigned char uart_read(struct Uart * uart);
-void uart_write(struct Uart * uart, unsigned char data);
+uint8_t uart_read(struct Uart *const uart);
+void uart_write(struct Uart *const uart, uint8_t data);
 
-extern struct Uart * uart_stdio;
-void uart_stdio_init(int num, unsigned long baud);
+extern struct Uart *uart_stdio;
+void uart_stdio_init(int16_t num, uint32_t baud);
 
 #endif // _ARCH_UART_H

src/arch/avr/toolchain.mk

@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+CC = avr-gcc -mmcu=$(EC_VARIANT)
+CFLAGS += -MMD -Os -fstack-usage -Wall -Werror \
+	-Wl,--gc-sections -Wl,-u,vfprintf -lprintf_flt
+
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105523
+_gcc_version = $(shell avr-gcc --version 2>/dev/null)
+ifneq ($(findstring 12.,$(_gcc_version)),)
+CFLAGS += --param=min-pagesize=0
+else ifneq ($(findstring 13.,$(_gcc_version)),)
+CFLAGS += --param=min-pagesize=0
+endif
+
+OBJCOPY = avr-objcopy
+
+OBJ=$(sort $(patsubst src/%.c,$(BUILD)/%.o,$(SRC)))
+
+# Run EC rom in simulator
+sim: $(BUILD)/ec.elf
+	simavr $< --mcu $(EC_VARIANT)
+
+# Convert from Intel Hex file to binary file
+$(BUILD)/ec.rom: $(BUILD)/ec.ihx
+	@echo "  OBJCOPY   $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(OBJCOPY) -I ihex -O binary --gap-fill 0xFF $< $@
+
+# Convert from ELF file to Intel Hex file
+$(BUILD)/ec.ihx: $(BUILD)/ec.elf
+	@echo "  OBJCOPY   $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(OBJCOPY) -j .text -j .data -O ihex $< $@
+
+# Link object files into ELF file
+$(BUILD)/ec.elf: $(OBJ)
+	@echo "  LINK      $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(CC) -o $@ $^
+
+# Compile C files into object files
+$(BUILD)/%.o: src/%.c $(INCLUDE)
+	@echo "  CC        $(subst $(BUILD)/,,$@)"
+	mkdir -p $(@D)
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+# Add dependency rules
+DEP = $(OBJ:%.o=%.d)
+-include $(DEP)

src/arch/avr/uart.c

@@ -22,29 +22,29 @@
     }
 
 #if defined(__AVR_ATmega328P__)
-    static struct Uart UARTS[] = {
-        UART(0)
-    };
+static struct Uart UARTS[] = {
+    UART(0)
+};
 #elif defined(__AVR_ATmega32U4__)
-    static struct Uart UARTS[] = {
-        UART(1)
-    };
+static struct Uart UARTS[] = {
+    UART(1)
+};
 #elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
-    static struct Uart UARTS[] = {
-        UART(0),
-        UART(1),
-        UART(2),
-        UART(3)
-    };
+static struct Uart UARTS[] = {
+    UART(0),
+    UART(1),
+    UART(2),
+    UART(3)
+};
 #else
     #error "Could not find UART definitions"
 #endif
 
-int uart_count() {
-    return sizeof(UARTS)/sizeof(struct Uart);
+int16_t uart_count(void) {
+    return sizeof(UARTS) / sizeof(struct Uart);
 }
 
-struct Uart * uart_new(int num) {
+struct Uart *uart_new(int16_t num) {
     if (num < uart_count()) {
         return &UARTS[num];
     } else {
@@ -52,49 +52,49 @@ struct Uart * uart_new(int num) {
     }
 }
 
-void uart_init(struct Uart * uart, unsigned long baud) {
-    unsigned long baud_prescale = (F_CPU / (baud * 16UL)) - 1;
-    *(uart->baud_h) = (uint8_t)(baud_prescale>>8);
+void uart_init(struct Uart *const uart, uint32_t baud) {
+    uint32_t baud_prescale = (F_CPU / (baud * 16UL)) - 1;
+    *(uart->baud_h) = (uint8_t)(baud_prescale >> 8);
     *(uart->baud_l) = (uint8_t)(baud_prescale);
     *(uart->a) = uart->a_init;
     *(uart->b) = uart->b_init;
     *(uart->c) = uart->c_init;
 }
 
-unsigned char uart_can_read(struct Uart * uart) {
+uint8_t uart_can_read(struct Uart *const uart) {
     return (*(uart->a)) & uart->a_read;
 }
 
-unsigned char uart_read(struct Uart * uart) {
-    while (!uart_can_read(uart)) ;
+uint8_t uart_read(struct Uart *const uart) {
+    while (!uart_can_read(uart)) {}
     return *(uart->data);
 }
 
-unsigned char uart_can_write(struct Uart * uart) {
+uint8_t uart_can_write(struct Uart *const uart) {
     return (*(uart->a)) & uart->a_write;
 }
 
-void uart_write(struct Uart * uart, unsigned char data) {
-    while (!uart_can_write(uart)) ;
+void uart_write(struct Uart *const uart, uint8_t data) {
+    while (!uart_can_write(uart)) {}
     *(uart->data) = data;
 }
 
-struct Uart * uart_stdio = NULL;
+struct Uart *uart_stdio = NULL;
 
-int uart_stdio_get(FILE * stream) {
-    return (int)uart_read(uart_stdio);
+int16_t uart_stdio_get(FILE *stream) {
+    return (int16_t)uart_read(uart_stdio);
 }
 
-int uart_stdio_put(char data, FILE * stream) {
-    uart_write(uart_stdio, (unsigned char)data);
+int16_t uart_stdio_put(char data, FILE *stream) {
+    uart_write(uart_stdio, (uint8_t)data);
     return 0;
 }
 
 FILE uart_stdio_file = FDEV_SETUP_STREAM(uart_stdio_put, uart_stdio_get, _FDEV_SETUP_RW);
 
-void uart_stdio_init(int num, unsigned long baud) {
-    struct Uart * uart = uart_new(num);
-    if(uart != NULL) {
+void uart_stdio_init(int16_t num, uint32_t baud) {
+    struct Uart *uart = uart_new(num);
+    if (uart != NULL) {
         uart_init(uart, baud);
         uart_stdio = uart;
         stdin = stdout = stderr = &uart_stdio_file;

src/board/arduino/mega2560/battery.c

@@ -4,19 +4,20 @@
 
 #include <common/i2c.h>
 
-int smbus_read(uint8_t address, uint8_t command, uint16_t * data) {
+int16_t smbus_read(uint8_t address, uint8_t command, uint16_t *const data) {
     return i2c_get(NULL, address, command, (uint8_t *)data, 2);
 }
 
-int smbus_write(uint8_t address, uint8_t command, uint16_t data) {
+int16_t smbus_write(uint8_t address, uint8_t command, uint16_t data) {
     return i2c_set(NULL, address, command, (uint8_t *)&data, 2);
 }
 
 void battery_debug(void) {
     uint16_t data = 0;
-    int res = 0;
+    int16_t res = 0;
 
-    #define command(N, A, V) { \
+#define command(N, A, V) \
+    { \
         printf(#N ": "); \
         res = smbus_read(A, V, &data); \
         if (res < 0) { \
@@ -45,5 +46,5 @@ void battery_debug(void) {
     command(ProchotOption1, 0x09, 0x3D);
     command(ProchotStatus, 0x09, 0x3A);
 
-    #undef command
+#undef command
 }

src/board/arduino/mega2560/board.mk

@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=atmega2560
+board-y += battery.c
+board-y += i2c.c
+board-y += main.c
+board-y += parallel.c
+
+EC=atmega
+EC_VARIANT=atmega2560
 
 PORT=$(wildcard /dev/ttyACM*)
 CONSOLE_BAUD=1000000
@@ -10,4 +16,4 @@ console:
 	sudo tio -b $(CONSOLE_BAUD) $(PORT)
 
 flash: $(BUILD)/ec.ihx
-	sudo avrdude -v -v -p $(EC) -c wiring -P $(PORT) -b 115200 -D -U flash:w:$<:i
+	sudo avrdude -v -v -p $(EC_VARIANT) -c wiring -P $(PORT) -b 115200 -D -U flash:w:$<:i

src/board/arduino/mega2560/i2c.c

@@ -5,8 +5,8 @@
 #include <board/cpu.h>
 #include <board/i2c.h>
 
-void i2c_init(unsigned long baud) {
-	TWAR = 0;
-	TWBR = (uint8_t)(((F_CPU / baud) - 16 ) / 2);
-	TWCR = 0;
+void i2c_init(uint32_t baud) {
+    TWAR = 0;
+    TWBR = (uint8_t)(((F_CPU / baud) - 16) / 2);
+    TWCR = 0;
 }

src/board/arduino/mega2560/include/board/i2c.h

@@ -3,6 +3,6 @@
 #ifndef _BOARD_I2C_H
 #define _BOARD_I2C_H
 
-void i2c_init(unsigned long baud);
+void i2c_init(uint32_t baud);
 
 #endif // _BOARD_I2C_H

src/board/arduino/mega2560/main.c

@@ -12,7 +12,7 @@ void init(void) {
 struct Gpio LED = GPIO(B, 7);
 
 //TODO: .h file
-void parallel_main(void);
+int parallel_main(void);
 
 int main(void) {
     init();

src/board/arduino/mega2560/parallel.c

@@ -99,47 +99,51 @@ enum ParallelState {
 // Parallel struct definition
 // See http://efplus.com/techref/io/parallel/1284/eppmode.htm
 struct Parallel {
-    #define PIN(N, P) struct Gpio * N;
+#define PIN(N, P) struct Gpio *N;
     PINS
-    #undef PIN
+#undef PIN
     enum ParallelState state;
 };
 
 // Parallel struct instance
 static struct Parallel PORT = {
-    #define PIN(N, P) .N = &GPIOS[P - 1],
+#define PIN(N, P) .N = &GPIOS[P - 1],
     PINS
-    #undef PIN
+#undef PIN
     .state = PARALLEL_STATE_UNKNOWN,
 };
 
 // Set port to all high-impedance inputs
-void parallel_hiz(struct Parallel * port) {
-    #define PIN(N, P) \
-        gpio_set_dir(port->N, false); \
-        gpio_set(port->N, false);
+void parallel_hiz(struct Parallel *const port) {
+#define PIN(N, P) \
+    gpio_set_dir(port->N, false); \
+    gpio_set(port->N, false);
     PINS
-    #undef PIN
+#undef PIN
 }
 
 // Place all data lines in high or low impendance state
-void parallel_data_dir(struct Parallel * port, bool dir) {
-    #define DATA_BIT(B) gpio_set_dir(port->d ## B, dir);
+void parallel_data_dir(struct Parallel *const port, bool dir) {
+#define DATA_BIT(B) gpio_set_dir(port->d##B, dir);
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 #define parallel_data_forward(P) parallel_data_dir(P, true)
 #define parallel_data_reverse(P) parallel_data_dir(P, false)
 
-void parallel_data_set_high(struct Parallel * port, uint8_t byte) {
+void parallel_data_set_high(struct Parallel *const port, uint8_t byte) {
     // By convention all lines are high, so only set the ones needed
-    #define DATA_BIT(B) if (!(byte & (1 << B))) gpio_set(port->d ## B, true);
+#define DATA_BIT(B) \
+    if (!(byte & (1 << B))) { \
+        gpio_set(port->d##B, true); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 
 // Set port to initial state required before being able to perform cycles
-void parallel_reset(struct Parallel * port, bool host) {
+void parallel_reset(struct Parallel *const port, bool host) {
     parallel_hiz(port);
 
     // nRESET: output on host, input on peripherals
@@ -164,9 +168,9 @@ void parallel_reset(struct Parallel * port, bool host) {
     gpio_set_dir(port->wait_n, !host);
 
     // Pull up data lines on host, leave floating on peripherals
-    #define DATA_BIT(B) gpio_set(port->d ## B, host);
+#define DATA_BIT(B) gpio_set(port->d##B, host);
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 
     //TODO: something with straps
 
@@ -178,42 +182,57 @@ void parallel_reset(struct Parallel * port, bool host) {
     }
 }
 
-void parallel_state(struct Parallel * port, enum ParallelState state) {
+void parallel_state(struct Parallel *const port, enum ParallelState state) {
     if (port->state != state) {
         switch (state) {
-            case PARALLEL_STATE_UNKNOWN:
-                return;
-            case PARALLEL_STATE_HIZ:
-                parallel_hiz(port);
-                break;
-            case PARALLEL_STATE_HOST:
-                parallel_reset(port, true);
-                break;
-            case PARALLEL_STATE_PERIPHERAL:
-                parallel_reset(port, false);
-                break;
+        case PARALLEL_STATE_UNKNOWN:
+            return;
+        case PARALLEL_STATE_HIZ:
+            parallel_hiz(port);
+            break;
+        case PARALLEL_STATE_HOST:
+            parallel_reset(port, true);
+            break;
+        case PARALLEL_STATE_PERIPHERAL:
+            parallel_reset(port, false);
+            break;
         }
         port->state = state;
     }
 }
 
-uint8_t parallel_read_data(struct Parallel * port) {
+uint8_t parallel_read_data(struct Parallel *const port) {
     uint8_t byte = 0;
-    #define DATA_BIT(B) if (gpio_get(port->d ## B)) byte |= (1 << B);
+#define DATA_BIT(B) \
+    if (gpio_get(port->d##B)) { \
+        byte |= (1 << B); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
     return byte;
 }
 
-void parallel_write_data(struct Parallel * port, uint8_t byte) {
+void parallel_write_data(struct Parallel *const port, uint8_t byte) {
     // By convention all lines are high, so only set the ones needed
-    #define DATA_BIT(B) if (!(byte & (1 << B))) gpio_set(port->d ## B, false);
+
+#define DATA_BIT(B) \
+    if (!(byte & (1 << B))) { \
+        gpio_set(port->d##B, false); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 
 //TODO: timeout
-int parallel_transaction(struct Parallel * port, uint8_t * data, int length, bool read, bool addr) {
+int16_t parallel_transaction(
+    struct Parallel *const port,
+    uint8_t *const data,
+    int16_t length,
+    bool read,
+    bool addr
+) {
     if (!read) {
         // Set write line low
         gpio_set(port->write_n, false);
@@ -222,7 +241,7 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
         parallel_data_forward(port);
     }
 
-    int i;
+    int16_t i;
     uint8_t byte = 0;
     for (i = 0; i < length; i++) {
         // Wait for peripheral to indicate it's ready for next cycle
@@ -255,7 +274,7 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
             // Set data strobe high
             gpio_set(port->data_n, true);
         }
-        
+
         // Wait for peripheral to indicate it's ready for next cycle
         while (gpio_get(port->wait_n)) {}
 
@@ -283,14 +302,23 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
 
 // host write -> peripheral read
 // host read -> peripheral write
-bool parallel_peripheral_cycle(struct Parallel * port, uint8_t * data, bool * read, bool * addr) {
+bool parallel_peripheral_cycle(
+    struct Parallel *const port,
+    uint8_t *const data,
+    bool *const read,
+    bool *const addr
+) {
     if (!gpio_get(port->reset_n)) {
         // XXX: Give host some time to get ready
         _delay_ms(1);
         return false;
     }
 
-    while (gpio_get(port->data_n) && gpio_get(port->addr_n)) {}
+    // Check for data or address cycle
+    if (gpio_get(port->data_n) && gpio_get(port->addr_n)) {
+        // No cycle ready
+        return false;
+    }
 
     *read = gpio_get(port->write_n);
     *addr = !gpio_get(port->addr_n);
@@ -301,10 +329,11 @@ bool parallel_peripheral_cycle(struct Parallel * port, uint8_t * data, bool * re
         parallel_write_data(port, *data);
     }
 
+    // Tell host we are ready for cycle
     gpio_set(port->wait_n, true);
 
     // Wait for host to finish strobe
-    while (!gpio_get(port->addr_n) || !gpio_get(port->data_n)) {}
+    while (!gpio_get(port->data_n) || !gpio_get(port->addr_n)) {}
 
     if (*read) {
         // Set data lines back to inputs
@@ -314,7 +343,7 @@ bool parallel_peripheral_cycle(struct Parallel * port, uint8_t * data, bool * re
         *data = parallel_read_data(port);
     }
 
-    // Tell host we're ready for next cycle
+    // Tell host we are ready for next cycle
     gpio_set(port->wait_n, false);
 
     return true;
@@ -322,39 +351,84 @@ bool parallel_peripheral_cycle(struct Parallel * port, uint8_t * data, bool * re
 
 static uint8_t ADDRESS_INDAR1 = 0x05;
 static uint8_t ADDRESS_INDDR = 0x08;
+static uint8_t ADDRESS_ECMSADDR0 = 0x2E;
+static uint8_t ADDRESS_ECMSADDR1 = 0x2F;
+static uint8_t ADDRESS_ECMSDATA = 0x30;
 
 static uint8_t ZERO = 0x00;
 static uint8_t SPI_ENABLE = 0xFE;
 static uint8_t SPI_DATA = 0xFD;
 
+int16_t parallel_ecms_read(
+    struct Parallel *const port,
+    uint16_t addr,
+    uint8_t *const data,
+    int16_t length
+) {
+    int16_t res;
+
+    res = parallel_set_address(port, &ADDRESS_ECMSADDR1, 1);
+    if (res < 0)
+        return res;
+
+    res = parallel_write(port, ((uint8_t *)&addr) + 1, 1);
+    if (res < 0)
+        return res;
+
+    res = parallel_set_address(port, &ADDRESS_ECMSADDR0, 1);
+    if (res < 0)
+        return res;
+
+    res = parallel_write(port, (uint8_t *)&addr, 1);
+    if (res < 0)
+        return res;
+
+    res = parallel_set_address(port, &ADDRESS_ECMSDATA, 1);
+    if (res < 0)
+        return res;
+
+    return parallel_read(port, data, length);
+}
+
 // Disable chip
-int parallel_spi_reset(struct Parallel *port) {
-    int res;
+int16_t parallel_spi_reset(struct Parallel *const port) {
+    int16_t res;
 
     res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_write(port, &SPI_ENABLE, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_set_address(port, &ADDRESS_INDDR, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     return parallel_write(port, &ZERO, 1);
 }
 
 // Enable chip and read or write data
-int parallel_spi_transaction(struct Parallel *port, uint8_t * data, int length, bool read) {
-    int res;
+int16_t parallel_spi_transaction(
+    struct Parallel *const port,
+    uint8_t *const data,
+    int16_t length,
+    bool read
+) {
+    int16_t res;
 
     res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_write(port, &SPI_DATA, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_set_address(port, &ADDRESS_INDDR, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     return parallel_transaction(port, data, length, read, false);
 }
@@ -363,16 +437,22 @@ int parallel_spi_transaction(struct Parallel *port, uint8_t * data, int length,
 #define parallel_spi_write(P, D, L) parallel_spi_transaction(P, D, L, false)
 
 // "Hardware" accelerated SPI programming, requires ECINDARs to be set
-int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, bool initialized) {
+int16_t parallel_spi_program(
+    struct Parallel *const port,
+    const uint8_t *const data,
+    int16_t length,
+    bool initialized
+) {
     static uint8_t aai[6] = { 0xAD, 0, 0, 0, 0, 0 };
-    int res;
-    int i;
+    int16_t res;
+    int16_t i;
     uint8_t status;
 
-    for(i = 0; (i + 1) < length; i+=2) {
+    for (i = 0; (i + 1) < length; i += 2) {
         // Disable chip to begin command
         res = parallel_spi_reset(port);
-        if (res < 0) return res;
+        if (res < 0)
+            return res;
 
         if (!initialized) {
             // If not initialized, the start address must be sent
@@ -384,7 +464,8 @@ int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, boo
             aai[5] = data[i + 1];
 
             res = parallel_spi_write(port, aai, 6);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             initialized = true;
         } else {
@@ -392,36 +473,41 @@ int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, boo
             aai[2] = data[i + 1];
 
             res = parallel_spi_write(port, aai, 3);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
         }
 
         // Wait for SPI busy flag to clear
         for (;;) {
             // Disable chip to begin command
             res = parallel_spi_reset(port);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             status = 0x05;
             res = parallel_spi_write(port, &status, 1);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             res = parallel_spi_read(port, &status, 1);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
-            if (!(status & 1)) break;
+            if (!(status & 1))
+                break;
         }
     }
 
     return i;
 }
 
-int serial_transaction(uint8_t * data, int length, bool read) {
-    int i;
+int16_t serial_transaction(uint8_t *const data, int16_t length, bool read) {
+    int16_t i;
     for (i = 0; i < length; i++) {
         if (read) {
             data[i] = (uint8_t)uart_read(uart_stdio);
         } else {
-            uart_write(uart_stdio, (unsigned char)data[i]);
+            uart_write(uart_stdio, (uint8_t)data[i]);
         }
     }
 
@@ -432,25 +518,26 @@ int serial_transaction(uint8_t * data, int length, bool read) {
 #define serial_write(D, L) serial_transaction(D, L, false)
 
 int parallel_main(void) {
-    int res = 0;
+    int16_t res = 0;
 
-    struct Parallel * port = &PORT;
+    struct Parallel *port = &PORT;
     parallel_state(port, PARALLEL_STATE_HIZ);
 
     static uint8_t data[128];
     char command;
-    int length;
-    int i;
+    int16_t length;
+    int16_t i;
     uint8_t address;
     bool set_address = false;
     bool program_aai = false;
 
-    unsigned char console_msg[] = "Entering console mode\n";
+    uint8_t console_msg[] = "Entering console mode\n";
 
     for (;;) {
         // Read command and length
         res = serial_read(data, 2);
-        if (res < 0) goto err;
+        if (res < 0)
+            goto err;
         // Command is a character
         command = (char)data[0];
 
@@ -466,125 +553,185 @@ int parallel_main(void) {
         }
 
         // Length is received data + 1
-        length = ((int)data[1]) + 1;
+        length = ((int16_t)data[1]) + 1;
         // Truncate length to size of data
-        if (length > sizeof(data)) length = sizeof(data);
+        if (length > sizeof(data))
+            length = sizeof(data);
 
         switch (command) {
-            // Buffer size
-            case 'B':
-                // Fill buffer size - 1
-                for (i = 0; i < length; i++) {
-                    if (i == 0) {
-                        data[i] = (uint8_t)(sizeof(data) - 1);
-                    } else {
-                        data[i] = 0;
-                    }
+        // Buffer size
+        case 'B':
+            // Fill buffer size - 1
+            for (i = 0; i < length; i++) {
+                if (i == 0) {
+                    data[i] = (uint8_t)(sizeof(data) - 1);
+                } else {
+                    data[i] = 0;
                 }
+            }
 
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Debug console
-            case 'C':
-                parallel_state(port, PARALLEL_STATE_PERIPHERAL);
+        // Debug console
+        case 'C':
+            // Set parallel lines to peripheral mode
+            parallel_state(port, PARALLEL_STATE_PERIPHERAL);
 
-                serial_write(console_msg, sizeof(console_msg));
-
-                for (;;) {
-                    bool read = false;
-                    bool addr = false;
-                    bool ret = parallel_peripheral_cycle(port, data, &read, &addr);
-
-                    if (ret && !read && !addr) {
+            // Tell the user the console is ready
+            serial_write(console_msg, sizeof(console_msg));
+            for (;;) {
+                bool read = false;
+                bool addr = false;
+                if (parallel_peripheral_cycle(port, data, &read, &addr)) {
+                    if (!read && !addr) {
                         res = serial_write(data, 1);
-                        if (res < 0) goto err;
+                        if (res < 0)
+                            goto err;
                     }
                 }
+            }
 
-                break;
+            break;
 
-            // Echo
-            case 'E':
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
+        // Echo
+        case 'E':
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
 
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Read data
-            case 'R':
-                parallel_state(port, PARALLEL_STATE_HOST);
+        // Forced debug console (can be used on all firmware but may miss bytes)
+        case 'F':
+            serial_write(console_msg, sizeof(console_msg));
 
-                // Update parallel address if necessary
-                if (set_address) {
-                    res = parallel_set_address(port, &address, 1);
-                    if (res < 0) goto err;
-                    set_address = false;
+            // We must be in host mode
+            parallel_state(port, PARALLEL_STATE_HOST);
+
+            uint16_t head = 0;
+            for (;;) {
+                // Read current position
+                res = parallel_ecms_read(port, 0xF00, data, 1);
+                if (res < 0)
+                    goto err;
+
+                uint16_t tail = (uint16_t)data[0];
+                if (tail == 0 || head == tail) {
+                    // No new data
+                    continue;
                 }
 
-                // Read data from parallel
-                res = parallel_read(port, data, length);
-                if (res < 0) goto err;
-
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
-
-                break;
-
-            // Accelerated program function
-            case 'P':
-                parallel_state(port, PARALLEL_STATE_HOST);
-
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
-
-                // Run accelerated programming function
-                res = parallel_spi_program(port, data, length, program_aai);
-                if (res < 0) goto err;
-                program_aai = true;
-
-                // Send ACK of data length
-                data[0] = (uint8_t)(length - 1);
-                res = serial_write(data, 1);
-                if (res < 0) goto err;
-
-                break;
-
-            // Write data
-            case 'W':
-                parallel_state(port, PARALLEL_STATE_HOST);
-
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
-
-                // Update parallel address if necessary
-                if (set_address) {
-                    res = parallel_set_address(port, &address, 1);
-                    if (res < 0) goto err;
-                    set_address = false;
+                if (head == 0) {
+                    // Set head if necessary
+                    head = tail;
+                    continue;
                 }
 
-                // Write data to parallel
-                res = parallel_write(port, data, length);
-                if (res < 0) goto err;
+                while (head != tail) {
+                    head += 1;
+                    if (head >= 256) {
+                        head = 1;
+                    }
 
-                // Send ACK of data length
-                data[0] = (uint8_t)(length - 1);
-                res = serial_write(data, 1);
-                if (res < 0) goto err;
+                    // Read byte at head
+                    res = parallel_ecms_read(port, 0xF00 + head, data, 1);
+                    if (res < 0)
+                        goto err;
 
-                break;
+                    // Print read byte
+                    serial_write(data, 1);
+                }
+            }
+
+            break;
+
+        // Read data
+        case 'R':
+            parallel_state(port, PARALLEL_STATE_HOST);
+
+            // Update parallel address if necessary
+            if (set_address) {
+                res = parallel_set_address(port, &address, 1);
+                if (res < 0)
+                    goto err;
+                set_address = false;
+            }
+
+            // Read data from parallel
+            res = parallel_read(port, data, length);
+            if (res < 0)
+                goto err;
+
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
+
+            break;
+
+        // Accelerated program function
+        case 'P':
+            parallel_state(port, PARALLEL_STATE_HOST);
+
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
+
+            // Run accelerated programming function
+            res = parallel_spi_program(port, data, length, program_aai);
+            if (res < 0)
+                goto err;
+            program_aai = true;
+
+            // Send ACK of data length
+            data[0] = (uint8_t)(length - 1);
+            res = serial_write(data, 1);
+            if (res < 0)
+                goto err;
+
+            break;
+
+        // Write data
+        case 'W':
+            parallel_state(port, PARALLEL_STATE_HOST);
+
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
+
+            // Update parallel address if necessary
+            if (set_address) {
+                res = parallel_set_address(port, &address, 1);
+                if (res < 0)
+                    goto err;
+                set_address = false;
+            }
+
+            // Write data to parallel
+            res = parallel_write(port, data, length);
+            if (res < 0)
+                goto err;
+
+            // Send ACK of data length
+            data[0] = (uint8_t)(length - 1);
+            res = serial_write(data, 1);
+            if (res < 0)
+                goto err;
+
+            break;
         }
     }
 

src/board/arduino/micro/board.mk

@@ -1,6 +1,9 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=atmega32u4
+board-y += main.c
+
+EC=atmega
+EC_VARIANT=atmega32u4
 
 PORT=$(wildcard /dev/ttyACM*)
 CONSOLE_BAUD=1000000
@@ -10,4 +13,4 @@ console:
 	sudo tio -b $(CONSOLE_BAUD) $(PORT)
 
 flash: $(BUILD)/ec.ihx
-	sudo avrdude -v -v -p $(EC) -c avr109 -P $(PORT) -b 115200 -D -U flash:w:$<:i
+	sudo avrdude -v -v -p $(EC_VARIANT) -c avr109 -P $(PORT) -b 115200 -D -U flash:w:$<:i

src/board/arduino/uno/battery.c

@@ -4,19 +4,20 @@
 
 #include <common/i2c.h>
 
-int smbus_read(uint8_t address, uint8_t command, uint16_t * data) {
+int16_t smbus_read(uint8_t address, uint8_t command, uint16_t *data) {
     return i2c_get(NULL, address, command, (uint8_t *)data, 2);
 }
 
-int smbus_write(uint8_t address, uint8_t command, uint16_t data) {
+int16_t smbus_write(uint8_t address, uint8_t command, uint16_t data) {
     return i2c_set(NULL, address, command, (uint8_t *)&data, 2);
 }
 
 void battery_debug(void) {
     uint16_t data = 0;
-    int res = 0;
+    int16_t res = 0;
 
-    #define command(N, A, V) { \
+#define command(N, A, V) \
+    { \
         printf(#N ": "); \
         res = smbus_read(A, V, &data); \
         if (res < 0) { \
@@ -45,5 +46,5 @@ void battery_debug(void) {
     command(ProchotOption1, 0x09, 0x3D);
     command(ProchotStatus, 0x09, 0x3A);
 
-    #undef command
+#undef command
 }

src/board/arduino/uno/board.mk

@@ -1,6 +1,12 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=atmega328p
+board-y += battery.c
+board-y += i2c.c
+board-y += main.c
+board-y += parallel.c
+
+EC=atmega
+EC_VARIANT=atmega328p
 
 PORT=$(wildcard /dev/ttyACM*)
 CONSOLE_BAUD=1000000
@@ -10,4 +16,4 @@ console:
 	sudo tio -b $(CONSOLE_BAUD) $(PORT)
 
 flash: $(BUILD)/ec.ihx
-	sudo avrdude -v -v -p $(EC) -c arduino -P $(PORT) -b 115200 -D -U flash:w:$<:i
+	sudo avrdude -v -v -p $(EC_VARIANT) -c arduino -P $(PORT) -b 115200 -D -U flash:w:$<:i

src/board/arduino/uno/i2c.c

@@ -5,8 +5,8 @@
 #include <board/cpu.h>
 #include <board/i2c.h>
 
-void i2c_init(unsigned long baud) {
-	TWAR = 0;
-	TWBR = (uint8_t)(((F_CPU / baud) - 16 ) / 2);
-	TWCR = 0;
+void i2c_init(uint32_t baud) {
+    TWAR = 0;
+    TWBR = (uint8_t)(((F_CPU / baud) - 16) / 2);
+    TWCR = 0;
 }

src/board/arduino/uno/include/board/i2c.h

@@ -3,6 +3,6 @@
 #ifndef _BOARD_I2C_H
 #define _BOARD_I2C_H
 
-void i2c_init(unsigned long baud);
+void i2c_init(uint32_t baud);
 
 #endif // _BOARD_I2C_H

src/board/arduino/uno/main.c

@@ -12,7 +12,7 @@ void init(void) {
 struct Gpio LED = GPIO(B, 5);
 
 //TODO: .h file
-void parallel_main(void);
+int parallel_main(void);
 
 int main(void) {
     init();

src/board/arduino/uno/parallel.c

@@ -65,49 +65,53 @@ static struct Gpio GPIOS[13] = {
     GPIO(C, 0),
 };
 
-
 // Parallel struct definition
 // See http://efplus.com/techref/io/parallel/1284/eppmode.htm
 struct Parallel {
-    #define PIN(N, P) struct Gpio * N;
+#define PIN(N, P) struct Gpio *N;
     PINS
-    #undef PIN
+#undef PIN
 };
 
 // Parallel struct instance
 static struct Parallel PORT = {
-    #define PIN(N, P) .N = &GPIOS[P - 1],
+#define PIN(N, P) .N = &GPIOS[P - 1],
     PINS
-    #undef PIN
+#undef PIN
 };
 
 // Set port to all high-impedance inputs
-void parallel_hiz(struct Parallel * port) {
-    #define PIN(N, P) \
-        gpio_set_dir(port->N, false); \
-        gpio_set(port->N, false);
+void parallel_hiz(struct Parallel *const port) {
+#define PIN(N, P) \
+    gpio_set_dir(port->N, false); \
+    gpio_set(port->N, false);
+
     PINS
-    #undef PIN
+#undef PIN
 }
 
 // Place all data lines in high or low impendance state
-void parallel_data_dir(struct Parallel * port, bool dir) {
-    #define DATA_BIT(B) gpio_set_dir(port->d ## B, dir);
+void parallel_data_dir(struct Parallel *const port, bool dir) {
+#define DATA_BIT(B) gpio_set_dir(port->d##B, dir);
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 #define parallel_data_forward(P) parallel_data_dir(P, true)
 #define parallel_data_reverse(P) parallel_data_dir(P, false)
 
-void parallel_data_set_high(struct Parallel * port, uint8_t byte) {
+void parallel_data_set_high(struct Parallel *const port, uint8_t byte) {
     // By convention all lines are high, so only set the ones needed
-    #define DATA_BIT(B) if (!(byte & (1 << B))) gpio_set(port->d ## B, true);
+#define DATA_BIT(B) \
+    if (!(byte & (1 << B))) { \
+        gpio_set(port->d##B, true); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 
 // Set port to initial state required before being able to perform cycles
-void parallel_reset(struct Parallel * port, bool host) {
+void parallel_reset(struct Parallel *const port, bool host) {
     parallel_hiz(port);
 
     // nRESET: output on host, input on peripherals
@@ -132,9 +136,9 @@ void parallel_reset(struct Parallel * port, bool host) {
     gpio_set_dir(port->wait_n, !host);
 
     // Pull up data lines on host, leave floating on peripherals
-    #define DATA_BIT(B) gpio_set(port->d ## B, host);
+#define DATA_BIT(B) gpio_set(port->d##B, host);
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 
     //TODO: something with straps
 
@@ -146,23 +150,37 @@ void parallel_reset(struct Parallel * port, bool host) {
     }
 }
 
-uint8_t parallel_read_data(struct Parallel * port) {
+uint8_t parallel_read_data(struct Parallel *const port) {
     uint8_t byte = 0;
-    #define DATA_BIT(B) if (gpio_get(port->d ## B)) byte |= (1 << B);
+#define DATA_BIT(B) \
+    if (gpio_get(port->d##B)) { \
+        byte |= (1 << B); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
     return byte;
 }
 
-void parallel_write_data(struct Parallel * port, uint8_t byte) {
+void parallel_write_data(struct Parallel *const port, uint8_t byte) {
     // By convention all lines are high, so only set the ones needed
-    #define DATA_BIT(B) if (!(byte & (1 << B))) gpio_set(port->d ## B, false);
+#define DATA_BIT(B) \
+    if (!(byte & (1 << B))) { \
+        gpio_set(port->d##B, false); \
+    }
+
     DATA_BITS
-    #undef DATA_BIT
+#undef DATA_BIT
 }
 
 //TODO: timeout
-int parallel_transaction(struct Parallel * port, uint8_t * data, int length, bool read, bool addr) {
+int16_t parallel_transaction(
+    struct Parallel *const port,
+    uint8_t *const data,
+    int16_t length,
+    bool read,
+    bool addr
+) {
     if (!read) {
         // Set write line low
         gpio_set(port->write_n, false);
@@ -171,7 +189,7 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
         parallel_data_forward(port);
     }
 
-    int i;
+    int16_t i;
     uint8_t byte = 0;
     for (i = 0; i < length; i++) {
         // Wait for peripheral to indicate it's ready for next cycle
@@ -233,7 +251,12 @@ int parallel_transaction(struct Parallel * port, uint8_t * data, int length, boo
 
 // host write -> peripheral read
 // host read -> peripheral write
-bool parallel_peripheral_cycle(struct Parallel * port, uint8_t * data, bool * read, bool * addr) {
+bool parallel_peripheral_cycle(
+    struct Parallel *const port,
+    uint8_t *const data,
+    bool *const read,
+    bool *const addr
+) {
     if (!gpio_get(port->reset_n)) {
         // XXX: Give host some time to get ready
         _delay_ms(1);
@@ -278,33 +301,44 @@ static uint8_t SPI_ENABLE = 0xFE;
 static uint8_t SPI_DATA = 0xFD;
 
 // Disable chip
-int parallel_spi_reset(struct Parallel *port) {
-    int res;
+int16_t parallel_spi_reset(struct Parallel *const port) {
+    int16_t res;
 
     res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_write(port, &SPI_ENABLE, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_set_address(port, &ADDRESS_INDDR, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     return parallel_write(port, &ZERO, 1);
 }
 
 // Enable chip and read or write data
-int parallel_spi_transaction(struct Parallel *port, uint8_t * data, int length, bool read) {
-    int res;
+int16_t parallel_spi_transaction(
+    struct Parallel *const port,
+    uint8_t *const data,
+    int16_t length,
+    bool read
+) {
+    int16_t res;
 
     res = parallel_set_address(port, &ADDRESS_INDAR1, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_write(port, &SPI_DATA, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     res = parallel_set_address(port, &ADDRESS_INDDR, 1);
-    if (res < 0) return res;
+    if (res < 0)
+        return res;
 
     return parallel_transaction(port, data, length, read, false);
 }
@@ -313,16 +347,22 @@ int parallel_spi_transaction(struct Parallel *port, uint8_t * data, int length,
 #define parallel_spi_write(P, D, L) parallel_spi_transaction(P, D, L, false)
 
 // "Hardware" accelerated SPI programming, requires ECINDARs to be set
-int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, bool initialized) {
+int16_t parallel_spi_program(
+    struct Parallel *const port,
+    const uint8_t *const data,
+    int16_t length,
+    bool initialized
+) {
     static uint8_t aai[6] = { 0xAD, 0, 0, 0, 0, 0 };
-    int res;
-    int i;
+    int16_t res;
+    int16_t i;
     uint8_t status;
 
-    for(i = 0; (i + 1) < length; i+=2) {
+    for (i = 0; (i + 1) < length; i += 2) {
         // Disable chip to begin command
         res = parallel_spi_reset(port);
-        if (res < 0) return res;
+        if (res < 0)
+            return res;
 
         if (!initialized) {
             // If not initialized, the start address must be sent
@@ -334,7 +374,8 @@ int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, boo
             aai[5] = data[i + 1];
 
             res = parallel_spi_write(port, aai, 6);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             initialized = true;
         } else {
@@ -342,36 +383,41 @@ int parallel_spi_program(struct Parallel * port, uint8_t * data, int length, boo
             aai[2] = data[i + 1];
 
             res = parallel_spi_write(port, aai, 3);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
         }
 
         // Wait for SPI busy flag to clear
         for (;;) {
             // Disable chip to begin command
             res = parallel_spi_reset(port);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             status = 0x05;
             res = parallel_spi_write(port, &status, 1);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
             res = parallel_spi_read(port, &status, 1);
-            if (res < 0) return res;
+            if (res < 0)
+                return res;
 
-            if (!(status & 1)) break;
+            if (!(status & 1))
+                break;
         }
     }
 
     return i;
 }
 
-int serial_transaction(uint8_t * data, int length, bool read) {
-    int i;
+int16_t serial_transaction(uint8_t *const data, int16_t length, bool read) {
+    int16_t i;
     for (i = 0; i < length; i++) {
         if (read) {
             data[i] = (uint8_t)uart_read(uart_stdio);
         } else {
-            uart_write(uart_stdio, (unsigned char)data[i]);
+            uart_write(uart_stdio, (uint8_t)data[i]);
         }
     }
 
@@ -381,26 +427,27 @@ int serial_transaction(uint8_t * data, int length, bool read) {
 #define serial_read(D, L) serial_transaction(D, L, true)
 #define serial_write(D, L) serial_transaction(D, L, false)
 
-int parallel_main(void) {
-    int res = 0;
+int16_t parallel_main(void) {
+    int16_t res = 0;
 
-    struct Parallel * port = &PORT;
+    struct Parallel *port = &PORT;
     parallel_reset(port, true);
 
     static uint8_t data[128];
     char command;
-    int length;
-    int i;
+    int16_t length;
+    int16_t i;
     uint8_t address;
     bool set_address = false;
     bool program_aai = false;
 
-    unsigned char console_msg[] = "Entering console mode\n";
+    uint8_t console_msg[] = "Entering console mode\n";
 
     for (;;) {
         // Read command and length
         res = serial_read(data, 2);
-        if (res < 0) goto err;
+        if (res < 0)
+            goto err;
         // Command is a character
         command = (char)data[0];
 
@@ -416,120 +463,135 @@ int parallel_main(void) {
         }
 
         // Length is received data + 1
-        length = ((int)data[1]) + 1;
+        length = ((int16_t)data[1]) + 1;
         // Truncate length to size of data
-        if (length > sizeof(data)) length = sizeof(data);
+        if (length > sizeof(data))
+            length = sizeof(data);
 
         switch (command) {
-            // Buffer size
-            case 'B':
-                // Fill buffer size - 1
-                for (i = 0; i < length; i++) {
-                    if (i == 0) {
-                        data[i] = (uint8_t)(sizeof(data) - 1);
-                    } else {
-                        data[i] = 0;
-                    }
+        // Buffer size
+        case 'B':
+            // Fill buffer size - 1
+            for (i = 0; i < length; i++) {
+                if (i == 0) {
+                    data[i] = (uint8_t)(sizeof(data) - 1);
+                } else {
+                    data[i] = 0;
                 }
+            }
 
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Debug console
-            case 'C':
-                serial_write(console_msg, sizeof(console_msg));
+        // Debug console
+        case 'C':
+            serial_write(console_msg, sizeof(console_msg));
 
-                // Reconfigure as a peripheral
-                parallel_reset(port, false);
+            // Reconfigure as a peripheral
+            parallel_reset(port, false);
 
-                for (;;) {
-                    bool read = false;
-                    bool addr = false;
-                    bool ret = parallel_peripheral_cycle(port, data, &read, &addr);
+            for (;;) {
+                bool read = false;
+                bool addr = false;
+                bool ret = parallel_peripheral_cycle(port, data, &read, &addr);
 
-                    if (ret && !read && !addr) {
-                        res = serial_write(data, 1);
-                        if (res < 0) goto err;
-                    }
+                if (ret && !read && !addr) {
+                    res = serial_write(data, 1);
+                    if (res < 0)
+                        goto err;
                 }
+            }
 
-                break;
+            break;
 
-            // Echo
-            case 'E':
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
+        // Echo
+        case 'E':
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
 
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Read data
-            case 'R':
-                // Update parallel address if necessary
-                if (set_address) {
-                    res = parallel_set_address(port, &address, 1);
-                    if (res < 0) goto err;
-                    set_address = false;
-                }
+        // Read data
+        case 'R':
+            // Update parallel address if necessary
+            if (set_address) {
+                res = parallel_set_address(port, &address, 1);
+                if (res < 0)
+                    goto err;
+                set_address = false;
+            }
 
-                // Read data from parallel
-                res = parallel_read(port, data, length);
-                if (res < 0) goto err;
+            // Read data from parallel
+            res = parallel_read(port, data, length);
+            if (res < 0)
+                goto err;
 
-                // Write data to serial
-                res = serial_write(data, length);
-                if (res < 0) goto err;
+            // Write data to serial
+            res = serial_write(data, length);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Accelerated program function
-            case 'P':
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
+        // Accelerated program function
+        case 'P':
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
 
-                // Run accelerated programming function
-                res = parallel_spi_program(port, data, length, program_aai);
-                if (res < 0) goto err;
-                program_aai = true;
+            // Run accelerated programming function
+            res = parallel_spi_program(port, data, length, program_aai);
+            if (res < 0)
+                goto err;
+            program_aai = true;
 
-                // Send ACK of data length
-                data[0] = (uint8_t)(length - 1);
-                res = serial_write(data, 1);
-                if (res < 0) goto err;
+            // Send ACK of data length
+            data[0] = (uint8_t)(length - 1);
+            res = serial_write(data, 1);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
 
-            // Write data
-            case 'W':
-                // Read data from serial
-                res = serial_read(data, length);
-                if (res < 0) goto err;
+        // Write data
+        case 'W':
+            // Read data from serial
+            res = serial_read(data, length);
+            if (res < 0)
+                goto err;
 
-                // Update parallel address if necessary
-                if (set_address) {
-                    res = parallel_set_address(port, &address, 1);
-                    if (res < 0) goto err;
-                    set_address = false;
-                }
+            // Update parallel address if necessary
+            if (set_address) {
+                res = parallel_set_address(port, &address, 1);
+                if (res < 0)
+                    goto err;
+                set_address = false;
+            }
 
-                // Write data to parallel
-                res = parallel_write(port, data, length);
-                if (res < 0) goto err;
+            // Write data to parallel
+            res = parallel_write(port, data, length);
+            if (res < 0)
+                goto err;
 
-                // Send ACK of data length
-                data[0] = (uint8_t)(length - 1);
-                res = serial_write(data, 1);
-                if (res < 0) goto err;
+            // Send ACK of data length
+            data[0] = (uint8_t)(length - 1);
+            res = serial_write(data, 1);
+            if (res < 0)
+                goto err;
 
-                break;
+            break;
         }
     }
 

src/board/system76/addw1/board.c

@@ -1,14 +1,8 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
-#include <arch/time.h>
-#include <board/battery.h>
 #include <board/board.h>
-#include <board/dgpu.h>
-#include <board/gctrl.h>
 #include <board/gpio.h>
 #include <board/kbc.h>
-#include <board/peci.h>
-#include <board/power.h>
 #include <common/debug.h>
 
 extern uint8_t main_cycle;
@@ -20,10 +14,6 @@ void board_init(void) {
     gpio_set(&BKL_EN, true);
     // Enable camera
     gpio_set(&CCD_EN, true);
-    // Enable wireless
-    gpio_set(&BT_EN, true);
-    gpio_set(&WLAN_EN, true);
-    gpio_set(&WLAN_PWR_EN, true);
     // Enable right USB port
     gpio_set(&USB_PWR_EN_N, false);
     // Assert SMI#, SCI#, and SWI#
@@ -32,45 +22,7 @@ void board_init(void) {
     gpio_set(&SWI_N, true);
 }
 
-// Set PL4 using PECI
-static int set_power_limit(uint8_t watts) {
-    return peci_wr_pkg_config(
-        60, // index
-        0, // param
-        ((uint32_t)watts) * 8
-    );
-}
-
-void board_on_ac(bool ac) {
-    uint8_t power_limit = ac ? POWER_LIMIT_AC : POWER_LIMIT_DC;
-    // Retry, timeout errors happen occasionally
-    for (int i = 0; i < 16; i++) {
-        int res = set_power_limit(power_limit);
-        DEBUG("set_power_limit %d = %d\n", power_limit, res);
-        if (res == 0x40) {
-            break;
-        } else if (res < 0) {
-            ERROR("set_power_limit failed: 0x%02X\n", -res);
-        } else {
-            ERROR("set_power_limit unknown response: 0x%02X\n", res);
-        }
-    }
-}
-
 void board_event(void) {
-    bool ac = !gpio_get(&ACIN_N);
-
-    static bool last_power_limit_ac = true;
-    // We don't use power_state because the latency needs to be low
-    if (gpio_get(&BUF_PLT_RST_N)) {
-        if (last_power_limit_ac != ac) {
-            board_on_ac(ac);
-            last_power_limit_ac = ac;
-        }
-    } else {
-        last_power_limit_ac = true;
-    }
-
     if (main_cycle == 0) {
         // Set keyboard LEDs
         static uint8_t last_kbc_leds = 0;

src/board/system76/addw1/board.mk

@@ -1,13 +1,21 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=it8587e
+board-y += board.c
+board-y += gpio.c
 
-# Add keymap to src
-KEYMAP?=default
-SRC+=$(BOARD_DIR)/keymap/$(KEYMAP).c
+EC=ite
+CONFIG_EC_ITE_IT8587E=y
+CONFIG_EC_FLASH_SIZE_128K = y
 
-# Set discrete GPU I2C bus
-CFLAGS+=-DI2C_DGPU=I2C_1
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+
+# Include keyboard
+KEYBOARD=15in_102
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED=rgb_pwm
 
 # Set battery I2C bus
 CFLAGS+=-DI2C_SMBUS=I2C_0
@@ -17,41 +25,38 @@ CFLAGS+=-DPS2_TOUCHPAD=PS2_3
 
 # Set smart charger parameters
 CFLAGS+=\
-	-DCHARGER_CHARGE_CURRENT=1536 \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=12600 \
 	-DCHARGER_INPUT_CURRENT=11800
 
-# Set battery charging thresholds
-CFLAGS+=\
-	-DBATTERY_START_THRESHOLD=0 \
-	-DBATTERY_END_THRESHOLD=100
-
 # Set CPU power limits in watts
 CFLAGS+=\
 	-DPOWER_LIMIT_AC=180 \
-	-DPOWER_LIMIT_DC=28
+	-DPOWER_LIMIT_DC=45
 
-# Custom fan curve
-CFLAGS+=-DBOARD_HEATUP=5
-CFLAGS+=-DBOARD_COOLDOWN=20
-CFLAGS+=-DBOARD_FAN_POINTS="\
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
-# Enable DGPU support
-CFLAGS+=-DHAVE_DGPU=1
-CFLAGS+=-DBOARD_DGPU_HEATUP=5
-CFLAGS+=-DBOARD_DGPU_COOLDOWN=20
-CFLAGS+=-DBOARD_DGPU_FAN_POINTS="\
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
 # Add system76 common code

src/board/system76/addw1/gpio.c

@@ -1,8 +1,9 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/gpio.h>
-#include <common/debug.h>
+#include <common/macro.h>
 
+// uncrustify:off
 struct Gpio __code ACIN_N =         GPIO(B, 6);
 struct Gpio __code AC_PRESENT =     GPIO(E, 7);
 struct Gpio __code ALL_SYS_PWRGD =  GPIO(C, 0);
@@ -25,10 +26,12 @@ struct Gpio __code LED_NUM_N =      GPIO(J, 4);
 struct Gpio __code LED_PWR =        GPIO(H, 5);
 struct Gpio __code LED_SCROLL_N =   GPIO(J, 3);
 struct Gpio __code LID_SW_N =       GPIO(D, 1);
+struct Gpio __code ME_WE =          GPIO(I, 2);
 struct Gpio __code PM_CLKRUN_N =    GPIO(H, 0); // renamed to ECCLKRUN#
 struct Gpio __code PM_PWROK =       GPIO(C, 6);
 struct Gpio __code PWR_BTN_N =      GPIO(D, 5);
 struct Gpio __code PWR_SW_N =       GPIO(D, 0);
+struct Gpio __code RGBKB_DET_N =    GPIO(E, 2);
 struct Gpio __code SB_KBCRST_N =    GPIO(E, 6);
 struct Gpio __code SCI_N =          GPIO(D, 4);
 struct Gpio __code SMI_N =          GPIO(D, 3);
@@ -39,27 +42,28 @@ struct Gpio __code USB_PWR_EN_N =   GPIO(F, 7);
 struct Gpio __code VA_EC_EN =       GPIO(J, 0); // renamed to SLP_SUS_EC#
 struct Gpio __code WLAN_EN =        GPIO(J, 2);
 struct Gpio __code WLAN_PWR_EN =    GPIO(B, 0);
+// uncrustify:on
 
-void gpio_init() {
+void gpio_init(void) {
     // Enable LPC reset on GPD2
     GCR = 0x04;
 
     // Set GPIO data
     // SYS_FAN
-    GPDRA = (1 << 3);
+    GPDRA = BIT(3);
     GPDRB = 0x00;
     GPDRC = 0x00;
     // PWR_BTN#, SCI#, SMI#
-    GPDRD = (1 << 5) | (1 << 4) | (1 << 3);
+    GPDRD = BIT(5) | BIT(4) | BIT(3);
     GPDRE = 0x00;
     // H_PECI
-    GPDRF = (1 << 6);
+    GPDRF = BIT(6);
     // AIRPLAN_LED#
-    GPDRG = (1 << 6);
+    GPDRG = BIT(6);
     GPDRH = 0x00;
     GPDRI = 0x00;
     // LED_CAP#, LED_NUM#, LED_SCROLL#, KBC_MUTE#
-    GPDRJ = (1 << 5) | (1 << 4) | (1 << 3) | (1 << 1);
+    GPDRJ = BIT(5) | BIT(4) | BIT(3) | BIT(1);
 
     // Set GPIO control
     // EC_PWM_LEDKB_P
@@ -101,11 +105,11 @@ void gpio_init() {
     // SMD_VGA_THERM
     GPCRC2 = GPIO_OUT;
     // KB-SO16
-    GPCRC3 = GPIO_IN | GPIO_UP;
+    GPCRC3 = GPIO_ALT | GPIO_UP;
     // CNVI_DET#_EC
     GPCRC4 = GPIO_IN | GPIO_UP;
     // KB-SO17
-    GPCRC5 = GPIO_IN | GPIO_UP;
+    GPCRC5 = GPIO_ALT | GPIO_UP;
     // PM_PWROK
     GPCRC6 = GPIO_OUT;
     // LED_ACIN
@@ -188,8 +192,6 @@ void gpio_init() {
     GPCRH5 = GPIO_OUT | GPIO_UP;
     // SUSB#_PCH
     GPCRH6 = GPIO_IN;
-    // TODO
-    GPCRH7 = GPIO_IN;
     // BAT_DET
     GPCRI0 = GPIO_ALT;
     // BAT_VOLT
@@ -237,40 +239,3 @@ void gpio_init() {
     // SERIRQ
     GPCRM6 = GPIO_ALT;
 }
-
-#if GPIO_DEBUG
-void gpio_debug_bank(
-    char * bank,
-    uint8_t data,
-    uint8_t mirror,
-    uint8_t pot,
-    volatile uint8_t * control
-) {
-    for(char i = 0; i < 8; i++) {
-        DEBUG(
-            "%s%d:\n\tdata %d\n\tmirror %d\n\tpot %d\n\tcontrol %02X\n",
-            bank,
-            i,
-            (data >> i) & 1,
-            (mirror >> i) & 1,
-            (pot >> i) & 1,
-            *(control + i)
-        );
-    }
-}
-
-void gpio_debug(void) {
-    #define bank(BANK) gpio_debug_bank(#BANK, GPDR ## BANK, GPDMR ## BANK, GPOT ## BANK, &GPCR ## BANK ## 0)
-    bank(A);
-    bank(B);
-    bank(C);
-    bank(D);
-    bank(E);
-    bank(F);
-    bank(G);
-    bank(H);
-    bank(I);
-    bank(J);
-    #undef bank
-}
-#endif

src/board/system76/addw1/include/board/gpio.h

@@ -5,14 +5,7 @@
 
 #include <ec/gpio.h>
 
-#define GPIO_ALT 0x00
-#define GPIO_IN 0x80
-#define GPIO_OUT 0x40
-#define GPIO_UP 0x04
-#define GPIO_DOWN 0x02
-
 void gpio_init(void);
-void gpio_debug(void);
 
 extern struct Gpio __code ACIN_N;
 extern struct Gpio __code AC_PRESENT;
@@ -36,12 +29,14 @@ extern struct Gpio __code LED_NUM_N;
 extern struct Gpio __code LED_PWR;
 extern struct Gpio __code LED_SCROLL_N;
 extern struct Gpio __code LID_SW_N;
+extern struct Gpio __code ME_WE;
 #define HAVE_PCH_DPWROK_EC 0
 #define HAVE_PCH_PWROK_EC 0
 extern struct Gpio __code PM_CLKRUN_N;
 extern struct Gpio __code PM_PWROK;
 extern struct Gpio __code PWR_BTN_N;
 extern struct Gpio __code PWR_SW_N;
+extern struct Gpio __code RGBKB_DET_N;
 extern struct Gpio __code SB_KBCRST_N;
 extern struct Gpio __code SCI_N;
 #define HAVE_SLP_SUS_N 0

src/board/system76/addw1/kbled.c

@@ -1,36 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-only
-
-#include <board/kbled.h>
-#include <ec/pwm.h>
-
-void kbled_init(void) {
-    //TODO: enable PWMs
-    kbled_reset();
-}
-
-void kbled_reset(void) {
-    // Set brightness and color
-    kbled_set_color(0xFFFFFF);
-    kbled_set(0x00);
-}
-
-uint8_t kbled_get(void) {
-    // Get PWM for power
-    return DCR0;
-}
-
-void kbled_set(uint8_t level) {
-    // Set PWM for power
-    DCR0 = level;
-}
-
-void kbled_set_color(uint32_t color) {
-    // Set PWM for blue component
-    DCR7 = (uint8_t)(color);
-
-    // Set PWM for green component
-    DCR6 = (uint8_t)(color >> 8);
-
-    // Set PWM for red component
-    DCR5 = (uint8_t)(color >> 16);
-}

src/board/system76/addw1/keymap/jeremy.c

@@ -1,24 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-only
-
-// Default layout
-
-#include <board/keymap.h>
-
-uint16_t __code KEYMAP[KM_LAY][KM_OUT][KM_IN] = {
-LAYOUT(
-    K_ESC, K_F1, K_F2, K_F3, K_F4, K_F5, K_F6, K_F7, K_F8, K_F9, K_F10, K_F11, K_F12, K_PRINT_SCREEN, K_INSERT, K_DEL, K_HOME, K_END, K_PGUP, K_PGDN,
-    K_TICK, K_1, K_2, K_3, K_4, K_5, K_6, K_7, K_8, K_9, K_0, K_MINUS, K_EQUALS, K_BKSP, K_NUM_LOCK, K_NUM_SLASH, K_NUM_ASTERISK, K_NUM_MINUS,
-    K_TAB, K_Q, K_W, K_E, K_R, K_T, K_Y, K_U, K_I, K_O, K_P, K_BRACE_OPEN, K_BRACE_CLOSE, K_BACKSLASH, K_NUM_7, K_NUM_8, K_NUM_9, K_NUM_PLUS,
-    KT_FN, K_A, K_S, K_D, K_F, K_G, K_H, K_J, K_K, K_L, K_SEMICOLON, K_QUOTE, K_ENTER, K_NUM_4, K_NUM_5, K_NUM_6,
-    K_LEFT_SHIFT, K_Z, K_X, K_C, K_V, K_B, K_N, K_M, K_COMMA, K_PERIOD, K_SLASH, K_RIGHT_SHIFT, K_UP, K_NUM_1, K_NUM_2, K_NUM_3, K_NUM_ENTER,
-    K_LEFT_CTRL, KT_FN, K_LEFT_ALT, K_LEFT_SUPER, K_SPACE, KT_FN, K_RIGHT_ALT, K_RIGHT_CTRL, K_LEFT, K_DOWN, K_RIGHT, K_NUM_0, K_NUM_PERIOD
-),
-LAYOUT(
-    K_ESC, K_TOUCHPAD, K_DISPLAY_TOGGLE, K_MUTE, K_F4, K_VOLUME_DOWN, K_VOLUME_UP, K_DISPLAY_MODE, K_BRIGHTNESS_DOWN, K_BRIGHTNESS_UP, K_CAMERA_TOGGLE, K_AIRPLANE_MODE, K_SUSPEND, K_PRINT_SCREEN, K_INSERT, K_DEL, K_HOME, K_END, K_PGUP, K_PGDN,
-    K_PLAY_PAUSE, K_FAN_TOGGLE, K_2, K_3, K_4, K_5, K_6, K_7, K_8, K_9, K_0, K_MINUS, K_EQUALS, K_DEL, K_NUM_LOCK, K_KBD_COLOR, K_KBD_TOGGLE, K_KBD_DOWN,
-    K_TAB, K_Q, K_W, K_E, K_R, K_T, K_Y, K_PGUP, K_HOME, K_PGDN, K_P, K_BRACE_OPEN, K_BRACE_CLOSE, K_BACKSLASH, K_NUM_7, K_NUM_8, K_NUM_9, K_KBD_UP,
-    KT_FN, K_A, K_S, K_D, K_F, K_G, K_LEFT, K_DOWN, K_UP, K_RIGHT, K_BKSP, K_DEL, K_ENTER, K_NUM_4, K_NUM_5, K_NUM_6,
-    K_LEFT_SHIFT, K_Z, K_X, K_C, K_V, K_B, K_END, K_M, K_COMMA, K_PERIOD, K_SLASH, K_RIGHT_SHIFT, K_UP, K_NUM_1, K_NUM_2, K_NUM_3, K_NUM_ENTER,
-    K_LEFT_CTRL, KT_FN, K_LEFT_ALT, K_LEFT_SUPER, K_ESC, KT_FN, K_RIGHT_ALT, K_RIGHT_CTRL, K_LEFT, K_DOWN, K_RIGHT, K_NUM_0, K_NUM_PERIOD
-)
-};

src/board/system76/addw2/board.c

@@ -1,15 +1,11 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
-#include <arch/time.h>
-#include <board/battery.h>
 #include <board/board.h>
-#include <board/dgpu.h>
 #include <board/gctrl.h>
 #include <board/gpio.h>
 #include <board/kbc.h>
-#include <board/peci.h>
-#include <board/power.h>
 #include <common/debug.h>
+#include <ec/ec.h>
 
 extern uint8_t main_cycle;
 
@@ -18,65 +14,14 @@ void board_init(void) {
     gpio_set(&BKL_EN, true);
     // Enable camera
     gpio_set(&CCD_EN, true);
-    // Enable wireless
-    gpio_set(&WLAN_EN, true);
-    gpio_set(&WLAN_PWR_EN, true);
     // Assert SMI#, SCI#, and SWI#
     gpio_set(&SCI_N, true);
     gpio_set(&SMI_N, true);
     gpio_set(&SWI_N, true);
-
-    // Enable POST codes
-    SPCTRL1 |= 0xC8;
-}
-
-// Set PL4 using PECI
-static int set_power_limit(uint8_t watts) {
-    return peci_wr_pkg_config(
-        60, // index
-        0, // param
-        ((uint32_t)watts) * 8
-    );
-}
-
-void board_on_ac(bool ac) {
-    uint8_t power_limit = ac ? POWER_LIMIT_AC : POWER_LIMIT_DC;
-    // Retry, timeout errors happen occasionally
-    for (int i = 0; i < 16; i++) {
-        int res = set_power_limit(power_limit);
-        DEBUG("set_power_limit %d = %d\n", power_limit, res);
-        if (res == 0x40) {
-            break;
-        } else if (res < 0) {
-            ERROR("set_power_limit failed: 0x%02X\n", -res);
-        } else {
-            ERROR("set_power_limit unknown response: 0x%02X\n", res);
-        }
-    }
 }
 
 void board_event(void) {
-    bool ac = !gpio_get(&ACIN_N);
-
-    static bool last_power_limit_ac = true;
-    // We don't use power_state because the latency needs to be low
-    if (gpio_get(&BUF_PLT_RST_N)) {
-        if (last_power_limit_ac != ac) {
-            board_on_ac(ac);
-            last_power_limit_ac = ac;
-        }
-    } else {
-        last_power_limit_ac = true;
-    }
-
-    // Read POST codes
-    while (P80H81HS & 1) {
-        uint8_t p80h = P80HD;
-        uint8_t p81h = P81HD;
-        P80H81HS |= 1;
-
-        DEBUG("POST %02X%02X\n", p81h, p80h);
-    }
+    ec_read_post_codes();
 
     if (main_cycle == 0) {
         // Set keyboard LEDs

src/board/system76/addw2/board.mk

@@ -1,13 +1,21 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=it5570e
+board-y += board.c
+board-y += gpio.c
 
-# Add keymap to src
-KEYMAP?=default
-SRC+=$(BOARD_DIR)/keymap/$(KEYMAP).c
+EC=ite
+CONFIG_EC_ITE_IT5570E=y
+CONFIG_EC_FLASH_SIZE_128K = y
 
-# Set discrete GPU I2C bus
-CFLAGS+=-DI2C_DGPU=I2C_1
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+
+# Include keyboard
+KEYBOARD=15in_102
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED=rgb_pwm
 
 # Set battery I2C bus
 CFLAGS+=-DI2C_SMBUS=I2C_4
@@ -17,41 +25,38 @@ CFLAGS+=-DPS2_TOUCHPAD=PS2_3
 
 # Set smart charger parameters
 CFLAGS+=\
-	-DCHARGER_CHARGE_CURRENT=1536 \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=12600 \
 	-DCHARGER_INPUT_CURRENT=11800
 
-# Set battery charging thresholds
-CFLAGS+=\
-	-DBATTERY_START_THRESHOLD=0 \
-	-DBATTERY_END_THRESHOLD=100
-
 # Set CPU power limits in watts
 CFLAGS+=\
 	-DPOWER_LIMIT_AC=180 \
-	-DPOWER_LIMIT_DC=28
+	-DPOWER_LIMIT_DC=45
 
-# Custom fan curve
-CFLAGS+=-DBOARD_HEATUP=5
-CFLAGS+=-DBOARD_COOLDOWN=20
-CFLAGS+=-DBOARD_FAN_POINTS="\
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
-# Enable DGPU support
-CFLAGS+=-DHAVE_DGPU=1
-CFLAGS+=-DBOARD_DGPU_HEATUP=5
-CFLAGS+=-DBOARD_DGPU_COOLDOWN=20
-CFLAGS+=-DBOARD_DGPU_FAN_POINTS="\
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
 # Add system76 common code

src/board/system76/addw2/gpio.c

@@ -1,8 +1,9 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/gpio.h>
-#include <common/debug.h>
+#include <common/macro.h>
 
+// uncrustify:off
 struct Gpio __code ACIN_N =         GPIO(B, 0);
 struct Gpio __code AC_PRESENT =     GPIO(E, 1);
 struct Gpio __code ALL_SYS_PWRGD =  GPIO(C, 0);
@@ -24,10 +25,12 @@ struct Gpio __code LED_NUM_N =      GPIO(G, 0);
 struct Gpio __code LED_PWR =        GPIO(D, 0);
 struct Gpio __code LED_SCROLL_N =   GPIO(J, 3);
 struct Gpio __code LID_SW_N =       GPIO(B, 1);
+struct Gpio __code ME_WE =          GPIO(I, 2);
 struct Gpio __code PM_CLKRUN_N =    GPIO(H, 0); // renamed to ECCLKRUN#
 struct Gpio __code PM_PWROK =       GPIO(C, 6);
 struct Gpio __code PWR_BTN_N =      GPIO(D, 5);
 struct Gpio __code PWR_SW_N =       GPIO(B, 3);
+struct Gpio __code RGBKB_DET_N =    GPIO(I, 5);
 struct Gpio __code SCI_N =          GPIO(D, 3);
 struct Gpio __code SMI_N =          GPIO(D, 4);
 struct Gpio __code SUSB_N_PCH =     GPIO(H, 6);
@@ -37,33 +40,39 @@ struct Gpio __code VA_EC_EN =       GPIO(J, 4);
 struct Gpio __code WLAN_EN =        GPIO(G, 1);
 struct Gpio __code WLAN_PWR_EN =    GPIO(J, 7);
 struct Gpio __code XLP_OUT =        GPIO(B, 4);
+// uncrustify:on
+
+void gpio_init(void) {
+    // PWRSW WDT 2 Enable 2
+    GCR9 = BIT(5);
+    // PWRSW WDT 2 Enable 1
+    GCR8 = BIT(4);
 
-void gpio_init() {
     // Enable LPC reset on GPD2
     GCR = 0x04;
     // Enable SMBus channel 4
-    GCR15 = (1 << 4);
+    GCR15 = BIT(4);
     // Set GPF2 and GPF3 to 3.3V
     GCR20 = 0;
 
     // Set GPIO data
     GPDRA = 0x00;
     // XLP_OUT, PWR_SW#
-    GPDRB = (1 << 4) | (1 << 3);
+    GPDRB = BIT(4) | BIT(3);
     GPDRC = 0x00;
     // PWR_BTN#, SCI#, SMI#
-    GPDRD = (1 << 5) | (1 << 4) | (1 << 3);
+    GPDRD = BIT(5) | BIT(4) | BIT(3);
     // PLVDD_RST_EC
-    GPDRE = (1 << 6);
+    GPDRE = BIT(6);
     // EC_PECI
-    GPDRF = (1 << 6);
+    GPDRF = BIT(6);
     // H_PROCHOT#_EC, LED_NUM#
-    GPDRG = (1 << 6) | (1 << 0);
+    GPDRG = BIT(6) | BIT(0);
     // AIRPLAN_LED#
-    GPDRH = 0x80; // (1 << 7)
+    GPDRH = BIT(7);
     GPDRI = 0x00;
     // LED_SCROLL#, LED_CAP#
-    GPDRJ = (1 << 3) | (1 << 2);
+    GPDRJ = BIT(3) | BIT(2);
 
     // Set GPIO control
     // EC_PWM_LEDKB_P
@@ -96,8 +105,6 @@ void gpio_init() {
     GPCRB5 = GPIO_OUT | GPIO_UP;
     // SUSBC_EN
     GPCRB6 = GPIO_OUT | GPIO_UP;
-    //
-    GPCRB7 = GPIO_IN;
     // ALL_SYS_PWRGD
     GPCRC0 = GPIO_IN;
     // SMC_VGA_THERM
@@ -105,11 +112,11 @@ void gpio_init() {
     // SMD_VGA_THERM
     GPCRC2 = GPIO_ALT;
     // KB-SO16
-    GPCRC3 = GPIO_IN;
+    GPCRC3 = GPIO_ALT | GPIO_UP;
     // CNVI_DET#_EC
     GPCRC4 = GPIO_IN | GPIO_UP;
     // KB-SO17
-    GPCRC5 = GPIO_IN;
+    GPCRC5 = GPIO_ALT | GPIO_UP;
     // PM_PWROK
     GPCRC6 = GPIO_OUT;
     // LED_ACIN
@@ -241,40 +248,3 @@ void gpio_init() {
     // SERIRQ
     GPCRM6 = GPIO_ALT;
 }
-
-#if GPIO_DEBUG
-void gpio_debug_bank(
-    char * bank,
-    uint8_t data,
-    uint8_t mirror,
-    uint8_t pot,
-    volatile uint8_t * control
-) {
-    for(char i = 0; i < 8; i++) {
-        DEBUG(
-            "%s%d:\n\tdata %d\n\tmirror %d\n\tpot %d\n\tcontrol %02X\n",
-            bank,
-            i,
-            (data >> i) & 1,
-            (mirror >> i) & 1,
-            (pot >> i) & 1,
-            *(control + i)
-        );
-    }
-}
-
-void gpio_debug(void) {
-    #define bank(BANK) gpio_debug_bank(#BANK, GPDR ## BANK, GPDMR ## BANK, GPOT ## BANK, &GPCR ## BANK ## 0)
-    bank(A);
-    bank(B);
-    bank(C);
-    bank(D);
-    bank(E);
-    bank(F);
-    bank(G);
-    bank(H);
-    bank(I);
-    bank(J);
-    #undef bank
-}
-#endif

src/board/system76/addw2/include/board/gpio.h

@@ -5,19 +5,13 @@
 
 #include <ec/gpio.h>
 
-#define GPIO_ALT 0x00
-#define GPIO_IN 0x80
-#define GPIO_OUT 0x40
-#define GPIO_UP 0x04
-#define GPIO_DOWN 0x02
-
 void gpio_init(void);
-void gpio_debug(void);
 
 extern struct Gpio __code ACIN_N;
 extern struct Gpio __code AC_PRESENT;
 extern struct Gpio __code ALL_SYS_PWRGD;
 extern struct Gpio __code BKL_EN;
+#define HAVE_BT_EN 0
 extern struct Gpio __code BUF_PLT_RST_N;
 extern struct Gpio __code CCD_EN;
 extern struct Gpio __code DD_ON;
@@ -35,12 +29,14 @@ extern struct Gpio __code LED_NUM_N;
 extern struct Gpio __code LED_PWR;
 extern struct Gpio __code LED_SCROLL_N;
 extern struct Gpio __code LID_SW_N;
+extern struct Gpio __code ME_WE;
 #define HAVE_PCH_DPWROK_EC 0
 #define HAVE_PCH_PWROK_EC 0
 extern struct Gpio __code PM_CLKRUN_N; // renamed to ECCLKRUN#
 extern struct Gpio __code PM_PWROK;
 extern struct Gpio __code PWR_BTN_N;
 extern struct Gpio __code PWR_SW_N;
+extern struct Gpio __code RGBKB_DET_N;
 extern struct Gpio __code SCI_N;
 #define HAVE_SLP_SUS_N 0
 extern struct Gpio __code SMI_N;

src/board/system76/addw2/kbled.c

@@ -1,36 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-only
-
-#include <board/kbled.h>
-#include <ec/pwm.h>
-
-void kbled_init(void) {
-    //TODO: enable PWMs
-    kbled_reset();
-}
-
-void kbled_reset(void) {
-    // Set brightness and color
-    kbled_set_color(0xFFFFFF);
-    kbled_set(0x00);
-}
-
-uint8_t kbled_get(void) {
-    // Get PWM for power
-    return DCR0;
-}
-
-void kbled_set(uint8_t level) {
-    // Set PWM for power
-    DCR0 = level;
-}
-
-void kbled_set_color(uint32_t color) {
-    // Set PWM for blue component
-    DCR7 = (uint8_t)(color);
-
-    // Set PWM for green component
-    DCR6 = (uint8_t)(color >> 8);
-
-    // Set PWM for red component
-    DCR5 = (uint8_t)(color >> 16);
-}

src/board/system76/addw3/board.c

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/battery.h>
+#include <board/board.h>
+#include <board/espi.h>
+#include <board/gctrl.h>
+#include <board/gpio.h>
+#include <common/debug.h>
+#include <ec/ec.h>
+
+void board_init(void) {
+    espi_init();
+
+    // Make sure charger is in off state, also enables PSYS
+    battery_charger_disable();
+
+    // Allow backlight to be turned on
+    gpio_set(&BKL_EN, true);
+    // Enable camera
+    gpio_set(&CCD_EN, true);
+}
+
+void board_event(void) {
+    espi_event();
+
+    ec_read_post_codes();
+}

src/board/system76/addw3/board.mk

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+board-y += board.c
+board-y += gpio.c
+
+EC=ite
+CONFIG_EC_ITE_IT5570E=y
+CONFIG_EC_FLASH_SIZE_128K = y
+
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+CONFIG_BUS_ESPI=y
+
+# Enable firmware security
+CONFIG_SECURITY=y
+
+# Include keyboard
+KEYBOARD=15in_102
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED=rgb_pwm
+
+# Set battery I2C bus
+CFLAGS+=-DI2C_SMBUS=I2C_4
+
+# Set touchpad PS2 bus
+CFLAGS+=-DPS2_TOUCHPAD=PS2_3
+
+# Set smart charger parameters
+# TODO: actually bq24800
+# FIXME: Verify parts and values.
+CHARGER=bq24780s
+CFLAGS+=\
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_CHARGE_CURRENT=1536 \
+	-DCHARGER_CHARGE_VOLTAGE=17600 \
+	-DCHARGER_INPUT_CURRENT=14000
+
+# Set CPU power limits in watts
+CFLAGS+=\
+	-DPOWER_LIMIT_AC=280 \
+	-DPOWER_LIMIT_DC=55
+
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_HEATUP=5
+CFLAGS += -DBOARD_FAN1_COOLDOWN=20
+CFLAGS += -DBOARD_FAN1_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_HEATUP=5
+CFLAGS += -DBOARD_FAN2_COOLDOWN=20
+CFLAGS += -DBOARD_FAN2_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+# Add system76 common code
+include src/board/system76/common/common.mk

src/board/system76/addw3/gpio.c

@@ -0,0 +1,272 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/gpio.h>
+#include <common/macro.h>
+
+// uncrustify:off
+struct Gpio __code ACIN_N =         GPIO(B, 0);
+struct Gpio __code AC_PRESENT =     GPIO(E, 1);
+struct Gpio __code ALL_SYS_PWRGD =  GPIO(C, 0);
+struct Gpio __code BKL_EN =         GPIO(C, 7);
+struct Gpio __code BUF_PLT_RST_N =  GPIO(D, 2); // renamed to ESPI_RESET_N
+struct Gpio __code CCD_EN =         GPIO(D, 1);
+struct Gpio __code DD_ON =          GPIO(E, 4);
+struct Gpio __code DGPU_PWR_EN =    GPIO(J, 2);
+struct Gpio __code EC_EN =          GPIO(B, 6); // renamed to SUSBC_EN#
+struct Gpio __code EC_RSMRST_N =    GPIO(E, 5);
+struct Gpio __code GC6_FB_EN =      GPIO(J, 3);
+struct Gpio __code LAN_WAKEUP_N =   GPIO(B, 2);
+struct Gpio __code LED_ACIN =       GPIO(H, 2);
+struct Gpio __code LED_BAT_CHG =    GPIO(H, 5);
+struct Gpio __code LED_BAT_FULL =   GPIO(J, 0);
+struct Gpio __code LED_PWR =        GPIO(D, 0);
+struct Gpio __code LID_SW_N =       GPIO(B, 1);
+struct Gpio __code ME_WE =          GPIO(H, 0);
+struct Gpio __code PCH_DPWROK_EC =  GPIO(F, 3);
+struct Gpio __code PM_PWROK =       GPIO(C, 6);
+struct Gpio __code PWR_BTN_N =      GPIO(D, 5);
+struct Gpio __code PWR_SW_N =       GPIO(B, 3);
+struct Gpio __code RGBKB_DET_N =    GPIO(E, 2);
+struct Gpio __code SLP_SUS_N =      GPIO(H, 7);
+struct Gpio __code VA_EC_EN =       GPIO(J, 4);
+struct Gpio __code WLAN_EN =        GPIO(G, 1);
+struct Gpio __code WLAN_PWR_EN =    GPIO(D, 3);
+struct Gpio __code XLP_OUT =        GPIO(B, 4);
+// uncrustify:on
+
+void gpio_init(void) {
+    // PWRSW WDT 2 Enable 2
+    GCR9 = BIT(5);
+    // PWRSW WDT 2 Enable 1
+    GCR8 = BIT(4);
+
+    // Enable LPC reset on GPD2
+    GCR = 0x04;
+    // Disable UARTs
+    GCR6 = 0;
+    // Enable SMBus channel 4
+    GCR15 = BIT(4);
+    // Set GPD2 to 1.8V
+    GCR19 = BIT(0);
+    // Set GPF2 and GPF3 to 3.3V
+    GCR20 = 0;
+
+    //TODO: what do these do?
+    GCR1 = 0;
+    GCR2 = 0;
+    GCR10 = 0x02;
+    GCR21 = 0;
+    GCR22 = 0x80;
+    GCR22 = 0x80;
+    GCR23 = 0x01;
+
+    // Set GPIO data
+    GPDRA = 0;
+    // BL_PWM_EN_EC, XLP_OUT
+    GPDRB = BIT(5) | BIT(4);
+    GPDRC = 0;
+    // PLVDD_RST_EC
+    GPDRD = BIT(4);
+    // USB_PWR_EN
+    GPDRE = BIT(3);
+    // PCH_DPWROK_EC
+    GPDRF = BIT(3);
+    // H_PROCHOT_EC
+    GPDRG = BIT(6);
+    GPDRH = 0;
+    GPDRI = 0;
+    // CC_EN
+    GPDRJ = BIT(7);
+    GPOTA = 0;
+    GPOTB = 0;
+    GPOTD = 0;
+    GPOTE = 0;
+    GPOTF = 0;
+    GPOTH = 0;
+    GPOTJ = 0;
+
+    // Set GPIO control
+
+    // EC_PWM_LEDKB_P
+    GPCRA0 = GPIO_ALT;
+    // KBC_BEEP
+    GPCRA1 = GPIO_ALT;
+    // CPU_FAN
+    GPCRA2 = GPIO_ALT;
+    // DDS_EC_PWM
+    GPCRA3 = GPIO_IN;
+    // VGA_FAN
+    GPCRA4 = GPIO_ALT;
+    // EC_PWM_LEDKB_R
+    GPCRA5 = GPIO_ALT;
+    // EC_PWM_LEDKB_G
+    GPCRA6 = GPIO_ALT;
+    // EC_PWM_LEDKB_B
+    GPCRA7 = GPIO_ALT;
+
+    // AC_IN#
+    GPCRB0 = GPIO_IN | GPIO_UP;
+    // LID_SW#
+    GPCRB1 = GPIO_IN | GPIO_UP;
+    // LAN_WAKEUP#
+    GPCRB2 = GPIO_IN;
+    // PWR_SW#
+    GPCRB3 = GPIO_IN;
+    // XLP_OUT
+    GPCRB4 = GPIO_OUT;
+    // BL_PWM_EN_EC
+    GPCRB5 = GPIO_OUT;
+    // SUSBC_EC#
+    GPCRB6 = GPIO_OUT | GPIO_UP;
+
+    // ALL_SYS_PWRGD
+    GPCRC0 = GPIO_IN;
+    // SMC_VGA_THERM
+    GPCRC1 = GPIO_ALT | GPIO_UP;
+    // SMD_VGA_THERM
+    GPCRC2 = GPIO_ALT | GPIO_UP;
+    // KB_SO16
+    GPCRC3 = GPIO_ALT | GPIO_UP;
+    // CNVI_DET#
+    GPCRC4 = GPIO_IN | GPIO_UP;
+    // KB_SO17
+    GPCRC5 = GPIO_ALT | GPIO_UP;
+    // PM_PWROK
+    GPCRC6 = GPIO_OUT;
+    // BKL_EN
+    GPCRC7 = GPIO_OUT | GPIO_UP;
+
+    // LED_PWR
+    GPCRD0 = GPIO_OUT | GPIO_UP;
+    // CCD_EN
+    GPCRD1 = GPIO_OUT;
+    // ESPI_RESET#
+    GPCRD2 = GPIO_ALT;
+    // WLAN_PWR_EN
+    GPCRD3 = GPIO_OUT;
+    // PLVDD_RST_EC
+    GPCRD4 = GPIO_OUT;
+    // PWR_BTN#
+    GPCRD5 = GPIO_OUT | GPIO_UP;
+    // CPU_FANSEN
+    GPCRD6 = GPIO_ALT;
+    // VGA_FANSEN
+    GPCRD7 = GPIO_ALT;
+
+    // SMC_BAT
+    GPCRE0 = GPIO_ALT | GPIO_UP;
+    // AC_PRESENT
+    GPCRE1 = GPIO_OUT | GPIO_UP;
+    // RGBKB-DET#
+    GPCRE2 = GPIO_IN | GPIO_UP;
+    // USB_PWR_EN
+    GPCRE3 = GPIO_OUT;
+    // DD_ON
+    GPCRE4 = GPIO_OUT | GPIO_DOWN;
+    // EC_RSMRST#
+    GPCRE5 = GPIO_OUT;
+    // SB_KBCRST#
+    GPCRE6 = GPIO_IN;
+    // SMD_BAT
+    GPCRE7 = GPIO_ALT | GPIO_UP;
+
+    // 80CLK
+    GPCRF0 = GPIO_IN;
+    // USB_CHARGE_EN
+    GPCRF1 = GPIO_OUT | GPIO_UP;
+    // 3IN1
+    GPCRF2 = GPIO_IN | GPIO_UP;
+    // PCH_DPWROK_EC
+    GPCRF3 = GPIO_OUT;
+    // TP_CLK
+    GPCRF4 = GPIO_ALT | GPIO_UP;
+    // TP_DATA
+    GPCRF5 = GPIO_ALT | GPIO_UP;
+    // H_PECI
+    GPCRF6 = GPIO_ALT;
+    // SINK_CTRL
+    GPCRF7 = GPIO_IN;
+
+    // EC_GPG0
+    GPCRG0 = GPIO_IN;
+    // WLAN_EN
+    GPCRG1 = GPIO_OUT;
+    // AUTO_LOAD_PWR
+    GPCRG2 = GPIO_IN;
+    // ALSPI_CE#
+    GPCRG3 = GPIO_ALT;
+    // ALSPI_MSI
+    GPCRG4 = GPIO_ALT;
+    // ALSPI_MSO
+    GPCRG5 = GPIO_ALT;
+    // H_PROCHOT_EC
+    GPCRG6 = GPIO_OUT | GPIO_UP;
+    // ALSPI_SCLK
+    GPCRG7 = GPIO_ALT;
+
+    // ME_WE
+    GPCRH0 = GPIO_OUT;
+    // SUSC#_PCH
+    GPCRH1 = GPIO_IN;
+    // LED_ACIN
+    GPCRH2 = GPIO_OUT | GPIO_UP;
+    // MUX_CTRL_BIOS
+    GPCRH3 = GPIO_OUT;
+    // ACE_I2C_IRQ2Z_EC
+    GPCRH4 = GPIO_IN;
+    // LED_BAT_CHG
+    GPCRH5 = GPIO_OUT | GPIO_UP;
+    // SUSB#_PCH
+    GPCRH6 = GPIO_IN;
+    // SLP_SUS#
+    GPCRH7 = GPIO_IN;
+
+    // BAT_DET
+    GPCRI0 = GPIO_ALT;
+    // BAT_VOLT
+    GPCRI1 = GPIO_ALT;
+    // THERM_VOLT2
+    GPCRI2 = GPIO_ALT;
+    // THERM_VOLT
+    GPCRI3 = GPIO_ALT;
+    // TOTAL_CUR
+    GPCRI4 = GPIO_ALT;
+    // CC1_DET
+    GPCRI5 = GPIO_IN;
+    // CC2_DET
+    GPCRI6 = GPIO_IN;
+    // MODEL_ID
+    GPCRI7 = GPIO_IN;
+
+    // LED_BAT_FULL
+    GPCRJ0 = GPIO_OUT | GPIO_UP;
+    // KBC_MUTE#
+    GPCRJ1 = GPIO_IN;
+    // DGPU_PWR_EN
+    GPCRJ2 = GPIO_IN;
+    // GC6_FB_EN_PCH
+    GPCRJ3 = GPIO_IN;
+    // VA_EC_EN
+    GPCRJ4 = GPIO_OUT;
+    // VBATT_BOOST#
+    GPCRJ5 = GPIO_IN;
+    // EC_GPIO
+    GPCRJ6 = GPIO_IN;
+    // CC_EN
+    GPCRJ7 = GPIO_OUT;
+
+    // ESPI_IO0_EC
+    GPCRM0 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO1_EC
+    GPCRM1 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO2_EC
+    GPCRM2 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO3_EC
+    GPCRM3 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CLK_EC
+    GPCRM4 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CS_EC#
+    GPCRM5 = GPIO_ALT;
+    // SERIRQ_ESPI_ALERT0
+    GPCRM6 = GPIO_IN | GPIO_UP | GPIO_DOWN;
+}

src/board/system76/addw3/include/board/gpio.h

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#ifndef _BOARD_GPIO_H
+#define _BOARD_GPIO_H
+
+#include <ec/gpio.h>
+
+void gpio_init(void);
+
+extern struct Gpio __code ACIN_N;
+extern struct Gpio __code AC_PRESENT;
+extern struct Gpio __code ALL_SYS_PWRGD;
+extern struct Gpio __code BKL_EN;
+#define HAVE_BT_EN 0
+extern struct Gpio __code BUF_PLT_RST_N;
+extern struct Gpio __code CCD_EN;
+extern struct Gpio __code DD_ON;
+extern struct Gpio __code DGPU_PWR_EN;
+extern struct Gpio __code EC_EN;
+extern struct Gpio __code EC_RSMRST_N;
+extern struct Gpio __code GC6_FB_EN;
+extern struct Gpio __code LAN_WAKEUP_N;
+extern struct Gpio __code LED_ACIN;
+#define HAVE_LED_AIRPLANE_N 0
+extern struct Gpio __code LED_BAT_CHG;
+extern struct Gpio __code LED_BAT_FULL;
+extern struct Gpio __code LED_PWR;
+extern struct Gpio __code LID_SW_N;
+extern struct Gpio __code ME_WE;
+extern struct Gpio __code PCH_DPWROK_EC;
+#define HAVE_PCH_PWROK_EC 0
+extern struct Gpio __code PM_PWROK;
+extern struct Gpio __code PWR_BTN_N;
+extern struct Gpio __code PWR_SW_N;
+extern struct Gpio __code RGBKB_DET_N;
+extern struct Gpio __code SLP_SUS_N;
+#define HAVE_SUS_PWR_ACK 0
+extern struct Gpio __code VA_EC_EN;
+extern struct Gpio __code WLAN_EN;
+extern struct Gpio __code WLAN_PWR_EN;
+extern struct Gpio __code XLP_OUT;
+
+#endif // _BOARD_GPIO_H

src/board/system76/addw4/board.c

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/battery.h>
+#include <board/board.h>
+#include <board/espi.h>
+#include <board/gctrl.h>
+#include <board/gpio.h>
+#include <common/debug.h>
+#include <ec/ec.h>
+
+void board_init(void) {
+    espi_init();
+
+    // Make sure charger is in off state, also enables PSYS
+    battery_charger_disable();
+
+    // Allow backlight to be turned on
+    gpio_set(&BKL_EN, true);
+    // Enable camera
+    gpio_set(&CCD_EN, true);
+}
+
+void board_event(void) {
+    espi_event();
+
+    ec_read_post_codes();
+}

src/board/system76/addw4/board.mk

@@ -0,0 +1,74 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+board-y += board.c
+board-y += gpio.c
+
+EC = ite
+CONFIG_EC_ITE_IT5570E = y
+CONFIG_EC_FLASH_SIZE_256K = y
+
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+CONFIG_BUS_ESPI = y
+CONFIG_PECI_OVER_ESPI = y
+
+# Enable firmware security
+CONFIG_SECURITY = y
+
+# Set keyboard configs
+KEYBOARD = 18H9LHA04
+
+CONFIG_HAVE_KBLED = y
+KBLED = rgb_pwm
+
+# Set touchpad PS2 bus
+CFLAGS += -DPS2_TOUCHPAD=PS2_3
+
+# Set smart charger parameters
+CHARGER = oz26786
+CFLAGS += -DI2C_SMBUS=I2C_4
+CFLAGS += \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
+	-DCHARGER_CHARGE_VOLTAGE=17400 \
+	-DCHARGER_INPUT_CURRENT=11500
+
+# Set CPU power limits in watts
+CFLAGS += \
+	-DPOWER_LIMIT_AC=230 \
+	-DPOWER_LIMIT_DC=45
+
+# Enable DGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_HEATUP=5
+CFLAGS += -DBOARD_FAN1_COOLDOWN=20
+CFLAGS += -DBOARD_FAN1_POINTS="\
+	FAN_POINT(60, 28), \
+	FAN_POINT(65, 28), \
+	FAN_POINT(70, 40), \
+	FAN_POINT(75, 60), \
+	FAN_POINT(80, 75), \
+	FAN_POINT(85, 90), \
+	FAN_POINT(90, 100), \
+"
+
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_HEATUP=5
+CFLAGS += -DBOARD_FAN2_COOLDOWN=20
+CFLAGS += -DBOARD_FAN2_POINTS="\
+	FAN_POINT(60, 28), \
+	FAN_POINT(65, 28), \
+	FAN_POINT(70, 40), \
+	FAN_POINT(75, 60), \
+	FAN_POINT(80, 75), \
+	FAN_POINT(85, 90), \
+	FAN_POINT(90, 100), \
+"
+
+# Add system76 common code
+include src/board/system76/common/common.mk

src/board/system76/addw4/gpio.c

@@ -0,0 +1,259 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/gpio.h>
+#include <common/macro.h>
+
+// uncrustify:off
+struct Gpio __code ACIN_N =         GPIO(B, 0);
+struct Gpio __code AC_PRESENT =     GPIO(E, 1);
+struct Gpio __code ALL_SYS_PWRGD =  GPIO(C, 0);
+struct Gpio __code BKL_EN =         GPIO(C, 7);
+struct Gpio __code BUF_PLT_RST_N =  GPIO(D, 2); // renamed to ESPI_RESET_N
+struct Gpio __code CCD_EN =         GPIO(D, 1);
+struct Gpio __code DD_ON =          GPIO(E, 4);
+struct Gpio __code DGPU_PWR_EN =    GPIO(H, 6);
+struct Gpio __code EC_EN =          GPIO(B, 6); // renamed to SUSBC_EN#
+struct Gpio __code EC_RSMRST_N =    GPIO(E, 5);
+struct Gpio __code GC6_FB_EN =      GPIO(B, 5);
+struct Gpio __code LAN_WAKEUP_N =   GPIO(B, 2);
+struct Gpio __code LED_ACIN =       GPIO(H, 2);
+struct Gpio __code LED_BAT_CHG =    GPIO(H, 5);
+struct Gpio __code LED_BAT_FULL =   GPIO(J, 0);
+struct Gpio __code LED_PWR =        GPIO(D, 0);
+struct Gpio __code LID_SW_N =       GPIO(B, 1);
+struct Gpio __code ME_WE =          GPIO(I, 2);
+struct Gpio __code PCH_DPWROK_EC =  GPIO(F, 3);
+struct Gpio __code PM_PWROK =       GPIO(C, 6);
+struct Gpio __code PWR_BTN_N =      GPIO(D, 5);
+struct Gpio __code PWR_SW_N =       GPIO(B, 3);
+struct Gpio __code RGBKB_DET_N =    GPIO(E, 2);
+struct Gpio __code SLP_SUS_N =      GPIO(H, 7);
+struct Gpio __code VA_EC_EN =       GPIO(J, 4);
+//struct Gpio __code WLAN_EN =        GPIO(G, 1);
+struct Gpio __code WLAN_PWR_EN =    GPIO(H, 3);
+struct Gpio __code XLP_OUT =        GPIO(B, 4);
+// uncrustify:on
+
+void gpio_init(void) {
+    // PWRSW WDT 2 Enable 2
+    GCR9 = BIT(5);
+    // PWRSW WDT 2 Enable 1
+    GCR8 = BIT(4);
+
+    // Enable LPC reset on GPD2
+    GCR = 0x04;
+    // Disable UARTs
+    GCR6 = 0;
+    // Enable SMBus channel 4
+    GCR15 = BIT(4);
+    // Set GPD2 to 1.8V
+    GCR19 = BIT(0);
+    // Set GPF2 and GPF3 to 3.3V
+    GCR20 = 0;
+
+    // Set GPM6 power domain to VCC
+    GCR23 = BIT(0);
+
+    // Set GPIO data
+    // DDS_EC_PWM
+    GPDRA = BIT(3);
+    // XLP_OUT, PWR_SW#
+    GPDRB = BIT(4) | BIT(3);
+    GPDRC = 0;
+    // VGA_HEATSINK_SW
+    GPDRD = BIT(3);
+    // USB_PWR_EN#
+    GPDRE = BIT(3);
+    GPDRF = 0;
+    // H_PROCHOT_EC, BL_PWM_EN_EC
+    GPDRG = BIT(6) | BIT(0);
+    GPDRH = 0;
+    GPDRI = 0;
+    // PLVDD_RST_EC, KBC_MUTE#
+    GPDRJ = BIT(7) | BIT(1);
+
+    // Set GPIO control
+
+    // EC_PWM_LEDKB_P
+    GPCRA0 = GPIO_ALT;
+    // KBC_BEEP
+    GPCRA1 = GPIO_ALT;
+    // CPU_FAN_PWM
+    GPCRA2 = GPIO_ALT;
+    // DDS_EC_PWM
+    GPCRA3 = GPIO_IN;
+    // VGA_FAN_PWM
+    GPCRA4 = GPIO_ALT;
+    // EC_PWM_LEDKB_R
+    GPCRA5 = GPIO_ALT;
+    // EC_PWM_LEDKB_G
+    GPCRA6 = GPIO_ALT;
+    // EC_PWM_LEDKB_B
+    GPCRA7 = GPIO_ALT;
+
+    // AC_IN#
+    GPCRB0 = GPIO_IN | GPIO_UP;
+    // LID_SW#
+    GPCRB1 = GPIO_IN | GPIO_UP;
+    // EC_LAN_WAKEUP#
+    GPCRB2 = GPIO_IN;
+    // PWR_SW#
+    GPCRB3 = GPIO_IN;
+    // XLP_OUT
+    GPCRB4 = GPIO_OUT;
+    // GC6_FB_EN_PCH
+    GPCRB5 = GPIO_IN;
+    // SUSBC_EC#
+    GPCRB6 = GPIO_OUT | GPIO_UP;
+
+    // ALL_SYS_PWRGD
+    GPCRC0 = GPIO_IN;
+    // SMC_VGA_THERM
+    GPCRC1 = GPIO_ALT | GPIO_UP;
+    // SMD_VGA_THERM
+    GPCRC2 = GPIO_ALT | GPIO_UP;
+    // KB-SO16
+    GPCRC3 = GPIO_ALT | GPIO_UP;
+    // CNVI_DET#
+    GPCRC4 = GPIO_IN | GPIO_UP;
+    // KB-SO17
+    GPCRC5 = GPIO_ALT | GPIO_UP;
+    // PM_PWROK
+    GPCRC6 = GPIO_OUT;
+    // BKL_EN
+    GPCRC7 = GPIO_OUT | GPIO_UP;
+
+    // LED_PWR
+    GPCRD0 = GPIO_OUT | GPIO_UP;
+    // CCD_EN
+    GPCRD1 = GPIO_OUT;
+    // ESPI_RESET#
+    GPCRD2 = GPIO_ALT;
+    // VGA_HEATSINK_SW
+    GPCRD3 = GPIO_OUT;
+    // 7411_SINK_CTRL
+    GPCRD4 = GPIO_IN;
+    // PWR_BTN#
+    GPCRD5 = GPIO_OUT | GPIO_UP;
+    // CPU_FANSEN
+    GPCRD6 = GPIO_ALT;
+    // VGA_HEATSINK_FANSEN
+    GPCRD7 = GPIO_ALT;
+
+    // SMC_BAT
+    GPCRE0 = GPIO_ALT | GPIO_UP;
+    // AC_PRESENT
+    GPCRE1 = GPIO_OUT | GPIO_UP;
+    // RGBKB-DET#
+    GPCRE2 = GPIO_IN | GPIO_UP;
+    // USB_PWR_EN# (XXX: Active high, despite pin name)
+    GPCRE3 = GPIO_OUT;
+    // DD_ON
+    GPCRE4 = GPIO_OUT | GPIO_DOWN;
+    // EC_RSMRST#
+    GPCRE5 = GPIO_OUT;
+    // JACK_IN#_EC
+    GPCRE6 = GPIO_IN;
+    // SMD_BAT
+    GPCRE7 = GPIO_ALT | GPIO_UP;
+
+    // 80CLK
+    GPCRF0 = GPIO_IN;
+    // USB_CHARGE_EN
+    GPCRF1 = GPIO_OUT | GPIO_UP;
+    // 3IN1
+    GPCRF2 = GPIO_IN | GPIO_UP;
+    // PCH_DPWROK_EC
+    GPCRF3 = GPIO_OUT;
+    // TP_CLK
+    GPCRF4 = GPIO_ALT | GPIO_UP;
+    // TP_DATA
+    GPCRF5 = GPIO_ALT | GPIO_UP;
+    // EC_SMD_EN#
+    GPCRF6 = GPIO_IN;
+    // MUX_CTRL_BIOS
+    GPCRF7 = GPIO_OUT;
+
+    // BL_PWM_EN_EC
+    GPCRG0 = GPIO_OUT;
+    // EC_WLAN_EN (NC)
+    GPCRG1 = GPIO_IN;
+    // AUTO_LOAD_PWR
+    GPCRG2 = GPIO_IN;
+    // ALSPI_CE#
+    GPCRG3 = GPIO_ALT;
+    // ALSPI_MSI
+    GPCRG4 = GPIO_ALT;
+    // ALSPI_MSO
+    GPCRG5 = GPIO_ALT;
+    // H_PROCHOT_EC
+    GPCRG6 = GPIO_OUT | GPIO_UP;
+    // ALSPI_SCLK
+    GPCRG7 = GPIO_ALT;
+
+    // PM_SLP_S0_CS_N
+    GPCRH0 = GPIO_IN;
+    // EC_TEST_R_2
+    GPCRH1 = GPIO_IN;
+    // LED_ACIN
+    GPCRH2 = GPIO_OUT | GPIO_UP;
+    // WLAN_PWR_EN
+    GPCRH3 = GPIO_OUT;
+    // OVERT#_EC
+    GPCRH4 = GPIO_IN | GPIO_UP;
+    // LED_BAT_CHG
+    GPCRH5 = GPIO_OUT | GPIO_UP;
+    // DGPU_PWR_EN
+    GPCRH6 = GPIO_IN;
+    // SLP_SUS#
+    GPCRH7 = GPIO_IN;
+
+    // BAT_DET
+    GPCRI0 = GPIO_ALT;
+    // BAT_VOLT
+    GPCRI1 = GPIO_ALT;
+    // ME_WE
+    GPCRI2 = GPIO_OUT;
+    // THERM_VOLT_CPU
+    GPCRI3 = GPIO_ALT;
+    // TOTAL_CUR
+    GPCRI4 = GPIO_ALT;
+    // THERM_VOLT_GPU
+    GPCRI5 = GPIO_ALT;
+    // THERM_VOLT_HEATSINK
+    GPCRI6 = GPIO_ALT;
+    // MODEL_ID
+    GPCRI7 = GPIO_IN;
+
+    // LED_BAT_FULL
+    GPCRJ0 = GPIO_OUT | GPIO_UP;
+    // KBC_MUTE# / USB charger detection
+    GPCRJ1 = GPIO_IN;
+    // PCH_FAN
+    GPCRJ2 = GPIO_ALT;
+    // HEATSINK_FANSEN_R
+    GPCRJ3 = GPIO_IN;
+    // VA_EC_EN
+    GPCRJ4 = GPIO_OUT;
+    // VBATT_BOOST#
+    GPCRJ5 = GPIO_IN;
+    // EC_GPIO
+    GPCRJ6 = GPIO_IN;
+    // PLVDD_RST_EC
+    GPCRJ7 = GPIO_OUT;
+
+    // ESPI_IO0_EC
+    GPCRM0 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO1_EC
+    GPCRM1 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO2_EC
+    GPCRM2 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO3_EC
+    GPCRM3 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CLK_EC
+    GPCRM4 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CS_EC#
+    GPCRM5 = GPIO_ALT;
+    // ESPI_ALRT0#
+    GPCRM6 = GPIO_IN | GPIO_UP | GPIO_DOWN;
+}

src/board/system76/addw4/include/board/gpio.h

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#ifndef _BOARD_GPIO_H
+#define _BOARD_GPIO_H
+
+#include <ec/gpio.h>
+
+void gpio_init(void);
+
+extern struct Gpio __code ACIN_N;
+extern struct Gpio __code AC_PRESENT;
+extern struct Gpio __code ALL_SYS_PWRGD;
+extern struct Gpio __code BKL_EN;
+#define HAVE_BT_EN 0
+extern struct Gpio __code BUF_PLT_RST_N;
+extern struct Gpio __code CCD_EN;
+extern struct Gpio __code DD_ON;
+extern struct Gpio __code DGPU_PWR_EN;
+extern struct Gpio __code EC_EN;
+extern struct Gpio __code EC_RSMRST_N;
+extern struct Gpio __code GC6_FB_EN;
+extern struct Gpio __code LAN_WAKEUP_N;
+extern struct Gpio __code LED_ACIN;
+#define HAVE_LED_AIRPLANE_N 0
+extern struct Gpio __code LED_BAT_CHG;
+extern struct Gpio __code LED_BAT_FULL;
+extern struct Gpio __code LED_PWR;
+extern struct Gpio __code LID_SW_N;
+extern struct Gpio __code ME_WE;
+extern struct Gpio __code PCH_DPWROK_EC;
+#define HAVE_PCH_PWROK_EC 0
+extern struct Gpio __code PM_PWROK;
+extern struct Gpio __code PWR_BTN_N;
+extern struct Gpio __code PWR_SW_N;
+extern struct Gpio __code RGBKB_DET_N;
+extern struct Gpio __code SLP_SUS_N;
+#define HAVE_SUS_PWR_ACK 0
+extern struct Gpio __code VA_EC_EN;
+#define HAVE_WLAN_EN 0
+extern struct Gpio __code WLAN_PWR_EN;
+extern struct Gpio __code XLP_OUT;
+
+#endif // _BOARD_GPIO_H

src/board/system76/bonw14/board.c

@@ -1,17 +1,10 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
-#include <arch/time.h>
-#include <board/battery.h>
 #include <board/board.h>
-#include <board/dgpu.h>
 #include <board/gctrl.h>
 #include <board/gpio.h>
-#include <board/kbc.h>
-#include <board/peci.h>
-#include <board/power.h>
 #include <common/debug.h>
-
-extern uint8_t main_cycle;
+#include <ec/ec.h>
 
 void board_init(void) {
     // Allow CPU to boot
@@ -20,66 +13,14 @@ void board_init(void) {
     gpio_set(&BKL_EN, true);
     // Enable camera
     gpio_set(&CCD_EN, true);
-    // Enable wireless
-    gpio_set(&BT_EN, true);
-    gpio_set(&WLAN_EN, true);
-    gpio_set(&WLAN_PWR_EN, true);
     // Enable USB port power?
     gpio_set(&USB_PWR_EN_N, false);
     // Assert SMI#, SCI#, and SWI#
     gpio_set(&SCI_N, true);
     gpio_set(&SMI_N, true);
     gpio_set(&SWI_N, true);
-
-    // Enable POST codes
-    SPCTRL1 |= 0xC8;
-}
-
-// Set PL4 using PECI
-static int set_power_limit(uint8_t watts) {
-    return peci_wr_pkg_config(
-        60, // index
-        0, // param
-        ((uint32_t)watts) * 8
-    );
-}
-
-void board_on_ac(bool ac) {
-    uint8_t power_limit = ac ? POWER_LIMIT_AC : POWER_LIMIT_DC;
-    // Retry, timeout errors happen occasionally
-    for (int i = 0; i < 16; i++) {
-        int res = set_power_limit(power_limit);
-        DEBUG("set_power_limit %d = %d\n", power_limit, res);
-        if (res == 0x40) {
-            break;
-        } else if (res < 0) {
-            ERROR("set_power_limit failed: 0x%02X\n", -res);
-        } else {
-            ERROR("set_power_limit unknown response: 0x%02X\n", res);
-        }
-    }
 }
 
 void board_event(void) {
-    bool ac = !gpio_get(&ACIN_N);
-
-    static bool last_power_limit_ac = true;
-    // We don't use power_state because the latency needs to be low
-    if (gpio_get(&BUF_PLT_RST_N)) {
-        if (last_power_limit_ac != ac) {
-            board_on_ac(ac);
-            last_power_limit_ac = ac;
-        }
-    } else {
-        last_power_limit_ac = true;
-    }
-
-    // Read POST codes
-    while (P80H81HS & 1) {
-        uint8_t p80h = P80HD;
-        uint8_t p81h = P81HD;
-        P80H81HS |= 1;
-
-        DEBUG("POST %02X%02X\n", p81h, p80h);
-    }
+    ec_read_post_codes();
 }

src/board/system76/bonw14/board.mk

@@ -1,13 +1,21 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
-EC=it5570e
+board-y += board.c
+board-y += gpio.c
 
-# Add keymap to src
-KEYMAP?=default
-SRC+=$(BOARD_DIR)/keymap/$(KEYMAP).c
+EC=ite
+CONFIG_EC_ITE_IT5570E=y
+CONFIG_EC_FLASH_SIZE_128K = y
 
-# Set discrete GPU I2C bus
-CFLAGS+=-DI2C_DGPU=I2C_1
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+
+# Include keyboard
+KEYBOARD=15in_102_nkey
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED=bonw14
 
 # Set battery I2C bus
 CFLAGS+=-DI2C_SMBUS=I2C_4
@@ -17,41 +25,38 @@ CFLAGS+=-DPS2_TOUCHPAD=PS2_3
 
 # Set smart charger parameters
 CFLAGS+=\
-	-DCHARGER_CHARGE_CURRENT=1536 \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=10 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
 	-DCHARGER_CHARGE_VOLTAGE=16800 \
 	-DCHARGER_INPUT_CURRENT=14000
 
-# Set battery charging thresholds
-CFLAGS+=\
-	-DBATTERY_START_THRESHOLD=0 \
-	-DBATTERY_END_THRESHOLD=100
-
 # Set CPU power limits in watts
 CFLAGS+=\
 	-DPOWER_LIMIT_AC=180 \
-	-DPOWER_LIMIT_DC=28
+	-DPOWER_LIMIT_DC=45
 
-# Custom fan curve
-CFLAGS+=-DBOARD_HEATUP=5
-CFLAGS+=-DBOARD_COOLDOWN=20
-CFLAGS+=-DBOARD_FAN_POINTS="\
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
-# Enable DGPU support
-CFLAGS+=-DHAVE_DGPU=1
-CFLAGS+=-DBOARD_DGPU_HEATUP=5
-CFLAGS+=-DBOARD_DGPU_COOLDOWN=20
-CFLAGS+=-DBOARD_DGPU_FAN_POINTS="\
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_POINTS="\
 	FAN_POINT(60, 40), \
 	FAN_POINT(65, 60), \
 	FAN_POINT(70, 75), \
 	FAN_POINT(75, 90), \
-	FAN_POINT(80, 100) \
+	FAN_POINT(80, 100), \
 "
 
 # Add system76 common code

src/board/system76/bonw14/gpio.c

@@ -1,8 +1,9 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/gpio.h>
-#include <common/debug.h>
+#include <common/macro.h>
 
+// uncrustify:off
 struct Gpio __code ACIN_N =         GPIO(B, 0);
 struct Gpio __code AC_PRESENT =     GPIO(E, 1);
 struct Gpio __code AC_V1_EC =       GPIO(J, 7);
@@ -38,12 +39,18 @@ struct Gpio __code VA_EC_EN =       GPIO(J, 4); // renamed to SLP_SUS#
 struct Gpio __code WLAN_EN =        GPIO(G, 1);
 struct Gpio __code WLAN_PWR_EN =    GPIO(A, 3);
 struct Gpio __code XLP_OUT =        GPIO(B, 4); // renamed to EN_3V
+// uncrustify:on
+
+void gpio_init(void) {
+    // PWRSW WDT 2 Enable 2
+    GCR9 = BIT(5);
+    // PWRSW WDT 2 Enable 1
+    GCR8 = BIT(4);
 
-void gpio_init() {
     // Enable LPC reset on GPD2
     GCR = 0x04;
     // Enable SMBus channel 4
-    GCR15 = (1 << 4);
+    GCR15 = BIT(4);
     // Set GPF2 and GPF3 to 3.3V
     GCR20 = 0;
 
@@ -90,8 +97,6 @@ void gpio_init() {
     GPCRB5 = GPIO_OUT | GPIO_UP;
     // EC_EN
     GPCRB6 = GPIO_OUT | GPIO_UP;
-    // NO PIN
-    GPCRB7 = GPIO_IN;
     // ALL_SYS_PWRGD
     GPCRC0 = GPIO_IN;
     // KBC_SMBus_CLK1
@@ -99,11 +104,11 @@ void gpio_init() {
     // KBC_SMBus_DAT1
     GPCRC2 = GPIO_ALT;
     // KB-SO16
-    GPCRC3 = GPIO_IN;
+    GPCRC3 = GPIO_ALT | GPIO_UP;
     // CNVI_DET#
     GPCRC4 = GPIO_IN | GPIO_UP;
     // KB-SO17
-    GPCRC5 = GPIO_IN;
+    GPCRC5 = GPIO_ALT | GPIO_UP;
     // PM_PWROK
     GPCRC6 = GPIO_OUT;
     // LED_ACIN
@@ -235,40 +240,3 @@ void gpio_init() {
     // SERIRQ
     GPCRM6 = GPIO_ALT;
 }
-
-#if GPIO_DEBUG
-void gpio_debug_bank(
-    char * bank,
-    uint8_t data,
-    uint8_t mirror,
-    uint8_t pot,
-    volatile uint8_t * control
-) {
-    for(char i = 0; i < 8; i++) {
-        DEBUG(
-            "%s%d:\n\tdata %d\n\tmirror %d\n\tpot %d\n\tcontrol %02X\n",
-            bank,
-            i,
-            (data >> i) & 1,
-            (mirror >> i) & 1,
-            (pot >> i) & 1,
-            *(control + i)
-        );
-    }
-}
-
-void gpio_debug(void) {
-    #define bank(BANK) gpio_debug_bank(#BANK, GPDR ## BANK, GPDMR ## BANK, GPOT ## BANK, &GPCR ## BANK ## 0)
-    bank(A);
-    bank(B);
-    bank(C);
-    bank(D);
-    bank(E);
-    bank(F);
-    bank(G);
-    bank(H);
-    bank(I);
-    bank(J);
-    #undef bank
-}
-#endif

src/board/system76/bonw14/include/board/gpio.h

@@ -5,14 +5,7 @@
 
 #include <ec/gpio.h>
 
-#define GPIO_ALT 0x00
-#define GPIO_IN 0x80
-#define GPIO_OUT 0x40
-#define GPIO_UP 0x04
-#define GPIO_DOWN 0x02
-
 void gpio_init(void);
-void gpio_debug(void);
 
 extern struct Gpio __code ACIN_N;
 extern struct Gpio __code AC_PRESENT;

src/board/system76/bonw15-b/board.mk

@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+board-y += ../bonw15/board.c
+board-y += ../bonw15/gpio.c
+
+# FIXME: Handle this better
+CFLAGS += -I$(BOARD_DIR)/../bonw15/include
+
+EC = ite
+CONFIG_EC_ITE_IT5570E = y
+CONFIG_EC_FLASH_SIZE_256K = y
+
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+CONFIG_BUS_ESPI = y
+
+# Enable firmware security
+CONFIG_SECURITY = y
+
+# Include keyboard
+KEYBOARD = 15in_102
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED = bonw14
+
+# Set battery I2C bus
+CFLAGS += -DI2C_SMBUS=I2C_4
+
+# Set touchpad PS2 bus
+CFLAGS += -DPS2_TOUCHPAD=PS2_3
+
+# Set smart charger parameters
+# XXX: PRS1 and PRS2 are in parallel for adapter Rsense?
+CHARGER = oz26786
+CFLAGS += \
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=5 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
+	-DCHARGER_CHARGE_VOLTAGE=17400 \
+	-DCHARGER_INPUT_CURRENT=16920
+
+# Set USB-PD parameters
+CONFIG_HAVE_USBPD = y
+CONFIG_USBPD_TPS65987 = y
+CFLAGS += -DI2C_USBPD=I2C_1
+
+# Set CPU power limits in watts
+CFLAGS += \
+	-DPOWER_LIMIT_AC=330 \
+	-DPOWER_LIMIT_DC=55
+
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_HEATUP=5
+CFLAGS += -DBOARD_FAN1_COOLDOWN=20
+CFLAGS += -DBOARD_FAN1_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_HEATUP=5
+CFLAGS += -DBOARD_FAN2_COOLDOWN=20
+CFLAGS += -DBOARD_FAN2_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+# Add system76 common code
+include src/board/system76/common/common.mk

src/board/system76/bonw15/board.c

@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/battery.h>
+#include <board/board.h>
+#include <board/espi.h>
+#include <board/gpio.h>
+#include <ec/ec.h>
+
+void board_init(void) {
+    espi_init();
+
+    // Make sure charger is in off state, also enables PSYS
+    battery_charger_disable();
+
+    // Allow backlight to be turned on
+    gpio_set(&BKL_EN, true);
+    // Enable camera
+    gpio_set(&CCD_EN, true);
+}
+
+void board_event(void) {
+    espi_event();
+
+    ec_read_post_codes();
+}

src/board/system76/bonw15/board.mk

@@ -0,0 +1,79 @@
+# SPDX-License-Identifier: GPL-3.0-only
+
+board-y += board.c
+board-y += gpio.c
+
+EC=ite
+CONFIG_EC_ITE_IT5570E=y
+CONFIG_EC_FLASH_SIZE_128K = y
+
+# Intel-based host
+CONFIG_PLATFORM_INTEL = y
+CONFIG_BUS_ESPI = y
+
+# Enable firmware security
+CONFIG_SECURITY=y
+
+# Include keyboard
+KEYBOARD=15in_102
+
+# Set keyboard LED mechanism
+CONFIG_HAVE_KBLED = y
+KBLED=bonw14
+
+# Set battery I2C bus
+CFLAGS+=-DI2C_SMBUS=I2C_4
+
+# Set touchpad PS2 bus
+CFLAGS+=-DPS2_TOUCHPAD=PS2_3
+
+
+# Set smart charger parameters
+# XXX: PRS1 and PRS2 are in parallel for adapter Rsense?
+CHARGER=oz26786
+CFLAGS+=\
+	-DCHARGER_ADAPTER_RSENSE=5 \
+	-DCHARGER_BATTERY_RSENSE=5 \
+	-DCHARGER_CHARGE_CURRENT=3072 \
+	-DCHARGER_CHARGE_VOLTAGE=17400 \
+	-DCHARGER_INPUT_CURRENT=16920
+
+# Set USB-PD parameters
+CONFIG_HAVE_USBPD = y
+CONFIG_USBPD_TPS65987 = y
+CFLAGS += -DI2C_USBPD=I2C_1
+
+# Set CPU power limits in watts
+CFLAGS+=\
+	-DPOWER_LIMIT_AC=330 \
+	-DPOWER_LIMIT_DC=55
+
+# Enable dGPU support
+CONFIG_HAVE_DGPU = y
+CFLAGS += -DI2C_DGPU=I2C_1
+
+# Fan configs
+CFLAGS += -DFAN1_PWM=DCR2
+CFLAGS += -DBOARD_FAN1_HEATUP=5
+CFLAGS += -DBOARD_FAN1_COOLDOWN=20
+CFLAGS += -DBOARD_FAN1_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+CFLAGS += -DFAN2_PWM=DCR4
+CFLAGS += -DBOARD_FAN2_HEATUP=5
+CFLAGS += -DBOARD_FAN2_COOLDOWN=20
+CFLAGS += -DBOARD_FAN2_POINTS="\
+	FAN_POINT(60, 40), \
+	FAN_POINT(65, 60), \
+	FAN_POINT(70, 75), \
+	FAN_POINT(75, 90), \
+	FAN_POINT(80, 100), \
+"
+
+# Add system76 common code
+include src/board/system76/common/common.mk

src/board/system76/bonw15/gpio.c

@@ -0,0 +1,275 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#include <board/gpio.h>
+#include <common/macro.h>
+
+// uncrustify:off
+struct Gpio __code ACIN_N =         GPIO(B, 0);
+struct Gpio __code AC_PRESENT =     GPIO(E, 1);
+struct Gpio __code ALL_SYS_PWRGD =  GPIO(C, 0);
+struct Gpio __code BKL_EN =         GPIO(C, 7);
+struct Gpio __code BUF_PLT_RST_N =  GPIO(D, 2); // renamed to ESPI_RESET_N
+struct Gpio __code CCD_EN =         GPIO(D, 1);
+struct Gpio __code DD_ON =          GPIO(E, 4);
+struct Gpio __code DGPU_PWR_EN =    GPIO(J, 2);
+struct Gpio __code EC_EN =          GPIO(B, 6); // renamed to SUSBC_EC#
+struct Gpio __code EC_RSMRST_N =    GPIO(E, 5);
+struct Gpio __code GC6_FB_EN =      GPIO(J, 3);
+struct Gpio __code JACK_IN_N =      GPIO(E, 6);
+struct Gpio __code LAN_WAKEUP_N =   GPIO(B, 2);
+struct Gpio __code LED_ACIN =       GPIO(H, 2);
+struct Gpio __code LED_BAT_CHG =    GPIO(H, 5);
+struct Gpio __code LED_BAT_FULL =   GPIO(J, 0);
+struct Gpio __code LED_PWR =        GPIO(D, 0);
+struct Gpio __code LID_SW_N =       GPIO(B, 1);
+struct Gpio __code ME_WE =          GPIO(I, 2);
+struct Gpio __code PCH_DPWROK_EC =  GPIO(F, 3);
+struct Gpio __code PCH_PWROK_EC =   GPIO(I, 5); // renamed to SYS_PWROK_EC
+struct Gpio __code PWR_BTN_N =      GPIO(D, 5);
+struct Gpio __code PWR_SW_N =       GPIO(B, 3);
+struct Gpio __code RGBKB_DET_N =    GPIO(E, 2);
+struct Gpio __code SINK_CTRL =      GPIO(H, 0);
+struct Gpio __code SLP_SUS_N =      GPIO(H, 7);
+struct Gpio __code VA_EC_EN =       GPIO(J, 4);
+struct Gpio __code WLAN_EN =        GPIO(G, 1);
+struct Gpio __code WLAN_PWR_EN =    GPIO(B, 5);
+struct Gpio __code XLP_OUT =        GPIO(B, 4);
+// uncrustify:on
+
+void gpio_init(void) {
+    // PWRSW WDT 2 Enable 2
+    GCR9 = BIT(5);
+    // PWRSW WDT 2 Enable 1
+    GCR8 = BIT(4);
+
+    // Enable LPC reset on GPD2
+    GCR = 0x04;
+    // Disable UARTs
+    GCR6 = 0;
+    // Enable SMBus channel 4
+    GCR15 = BIT(4);
+    // Set GPD2 to 1.8V
+    GCR19 = BIT(0);
+    // Set GPF2 and GPF3 to 3.3V
+    GCR20 = 0;
+
+    //TODO: what do these do?
+    GCR1 = 0;
+    GCR2 = 0;
+    GCR10 = 0x02;
+    GCR21 = 0;
+    GCR22 = 0x80;
+    GCR23 = 0x01;
+
+    // Set GPIO data
+    GPDRA = 0;
+    // XLP_OUT, PWR_SW#
+    GPDRB = BIT(4) | BIT(3);
+    // PLVDD_RST_EC
+    GPDRC = BIT(6);
+    // BL_PWM_EN_EC
+    GPDRD = BIT(3);
+    // USB_PWR_EN# (inverted)
+    GPDRE = BIT(3);
+    // PCH_DPWROK_EC
+    GPDRF = BIT(3);
+    // H_PROCHOT#_EC
+    GPDRG = BIT(6);
+    // EC_AMP_EN
+    GPDRH = BIT(6);
+    GPDRI = 0;
+    GPDRJ = 0;
+
+    GPOTA = 0;
+    GPOTB = 0;
+    GPOTD = 0;
+    GPOTE = 0;
+    GPOTF = 0;
+    GPOTH = 0;
+    GPOTJ = 0;
+
+    // Set GPIO control
+
+    // EC_PWM_LEDKB_P
+    GPCRA0 = GPIO_ALT;
+    // KBC_BEEP
+    GPCRA1 = GPIO_ALT;
+    // CPU_FAN
+    GPCRA2 = GPIO_ALT;
+    // DDS_EC_PWM
+    GPCRA3 = GPIO_IN;
+    // VGA_FAN
+    GPCRA4 = GPIO_ALT;
+    // EC_PWM_LEDKB_R
+    GPCRA5 = GPIO_ALT;
+    // EC_PWM_LEDKB_G
+    GPCRA6 = GPIO_ALT;
+    // EC_PWM_LEDKB_B
+    GPCRA7 = GPIO_ALT;
+
+    // AC_IN#
+    GPCRB0 = GPIO_IN | GPIO_UP;
+    // LID_SW#
+    GPCRB1 = GPIO_IN | GPIO_UP;
+    // EC_LAN_WAKEUP#
+    GPCRB2 = GPIO_IN | GPIO_UP;
+    // PWR_SW#
+    GPCRB3 = GPIO_IN;
+    // XLP_OUT
+    GPCRB4 = GPIO_OUT;
+    // WLAN_PWR_EN
+    GPCRB5 = GPIO_OUT;
+    // SUSBC_EC#
+    GPCRB6 = GPIO_OUT | GPIO_UP;
+
+    // ALL_SYS_PWRGD
+    GPCRC0 = GPIO_IN;
+    // SMC_VGA_THERM
+    GPCRC1 = GPIO_ALT | GPIO_UP;
+    // SMD_VGA_THERM
+    GPCRC2 = GPIO_ALT | GPIO_UP;
+    // KB-SO16
+    GPCRC3 = GPIO_ALT | GPIO_UP;
+    // CNVI_DET#
+    GPCRC4 = GPIO_IN | GPIO_UP;
+    // KB-SO17
+    GPCRC5 = GPIO_ALT | GPIO_UP;
+    // PLVDD_RST_EC
+    GPCRC6 = GPIO_OUT;
+    // BKL_EN
+    GPCRC7 = GPIO_OUT | GPIO_UP;
+
+    // LED_PWR
+    GPCRD0 = GPIO_OUT;
+    // CCD_EN
+    GPCRD1 = GPIO_OUT;
+    // ESPI_RESET_N
+    GPCRD2 = GPIO_ALT;
+    // BL_PWM_EN_EC
+    GPCRD3 = GPIO_OUT;
+    // MUX_CTRL_BIOS
+    GPCRD4 = GPIO_OUT;
+    // PWR_BTN#
+    GPCRD5 = GPIO_OUT | GPIO_UP;
+    // CPU_FANSEN
+    GPCRD6 = GPIO_ALT;
+    // VGA_FANSEN
+    GPCRD7 = GPIO_ALT;
+
+    // SMC_BAT
+    GPCRE0 = GPIO_ALT | GPIO_UP;
+    // AC_PRESENT
+    GPCRE1 = GPIO_OUT | GPIO_UP;
+    // RGBKB_DET#
+    GPCRE2 = GPIO_IN | GPIO_UP;
+    // USB_PWR_EN#
+    GPCRE3 = GPIO_OUT;
+    // DD_ON
+    GPCRE4 = GPIO_OUT | GPIO_DOWN;
+    // EC_RSMRST#
+    GPCRE5 = GPIO_OUT;
+    // JACK_IN#_EC
+    GPCRE6 = GPIO_IN;
+    // SMD_BAT
+    GPCRE7 = GPIO_ALT | GPIO_UP;
+
+    // 80CLK
+    GPCRF0 = GPIO_IN;
+    // USB_CHARGE_EN
+    GPCRF1 = GPIO_OUT | GPIO_UP;
+    // 3IN1
+    GPCRF2 = GPIO_IN | GPIO_UP;
+    // PCH_DPWROK_EC
+    GPCRF3 = GPIO_OUT;
+    // TP_CLK
+    GPCRF4 = GPIO_ALT | GPIO_UP;
+    // TP_DATA
+    GPCRF5 = GPIO_ALT | GPIO_UP;
+    // H_PECI
+    GPCRF6 = GPIO_ALT;
+    // CPU_C10_GATE#
+    GPCRF7 = GPIO_IN;
+
+    // dGPU_OVERT_EC
+    GPCRG0 = GPIO_IN;
+    // WLAN_EN
+    GPCRG1 = GPIO_OUT;
+    // 100k pull up to VDD3
+    GPCRG2 = GPIO_IN;
+    // ALSPI_CE#
+    GPCRG3 = GPIO_ALT;
+    // ALSPI_MSI
+    GPCRG4 = GPIO_ALT;
+    // ALSPI_MSO
+    GPCRG5 = GPIO_ALT;
+    // H_PROCHOT#_EC
+    GPCRG6 = GPIO_OUT | GPIO_UP;
+    // ALSPI_SCLK
+    GPCRG7 = GPIO_ALT;
+
+    // SINK_CTRL
+    GPCRH0 = GPIO_IN;
+    // SUSC#_PCH
+    GPCRH1 = GPIO_IN;
+    // LED_ACIN
+    GPCRH2 = GPIO_OUT | GPIO_UP;
+    // TBT_I2C_IRQ2Z
+    GPCRH3 = GPIO_IN;
+    // BOARD_ID0
+    GPCRH4 = GPIO_IN;
+    // LED_BAT_CHG
+    GPCRH5 = GPIO_OUT | GPIO_UP;
+    // EC_AMP_EN
+    GPCRH6 = GPIO_OUT;
+    // SLP_SUS#
+    GPCRH7 = GPIO_IN;
+
+    // BAT_DET
+    GPCRI0 = GPIO_ALT;
+    // BAT_VOLT
+    GPCRI1 = GPIO_ALT;
+    // ME_WE
+    GPCRI2 = GPIO_OUT;
+    // THERM_VOLT_CPU
+    GPCRI3 = GPIO_ALT;
+    // TOTAL_CUR
+    GPCRI4 = GPIO_ALT;
+    // SYS_PWROK_EC
+    GPCRI5 = GPIO_OUT;
+    // THERM_VOLT_CPU
+    GPCRI6 = GPIO_ALT;
+    // BOARD_ID1
+    GPCRI7 = GPIO_IN;
+
+    // LED_BAT_FULL
+    GPCRJ0 = GPIO_OUT | GPIO_UP;
+    // KBC_MUTE#
+    GPCRJ1 = GPIO_IN;
+    // DGPU_PWR_EN
+    GPCRJ2 = GPIO_IN;
+    // GC6_FB_EN_PCH
+    GPCRJ3 = GPIO_IN;
+    // VA_EC_EN
+    GPCRJ4 = GPIO_OUT;
+    // VBATT_BOOST#
+    GPCRJ5 = GPIO_IN;
+    // EC_GPIO
+    GPCRJ6 = GPIO_IN | GPIO_DOWN;
+    // PERKB_DET#
+    GPCRJ7 = GPIO_IN | GPIO_UP;
+
+    // ESPI_IO0_EC
+    GPCRM0 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO1_EC
+    GPCRM1 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO2_EC
+    GPCRM2 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_IO3_EC
+    GPCRM3 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CLK_EC
+    GPCRM4 = GPIO_ALT | GPIO_UP | GPIO_DOWN;
+    // ESPI_CS_EC#
+    GPCRM5 = GPIO_ALT;
+    // ESPI_ALERT0#
+    GPCRM6 = GPIO_IN | GPIO_UP | GPIO_DOWN;
+}

src/board/system76/bonw15/include/board/gpio.h

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: GPL-3.0-only
+
+#ifndef _BOARD_GPIO_H
+#define _BOARD_GPIO_H
+
+#include <ec/gpio.h>
+
+void gpio_init(void);
+
+extern struct Gpio __code ACIN_N;
+extern struct Gpio __code AC_PRESENT;
+extern struct Gpio __code ALL_SYS_PWRGD;
+extern struct Gpio __code BKL_EN;
+#define HAVE_BT_EN 0
+extern struct Gpio __code BUF_PLT_RST_N;
+extern struct Gpio __code CCD_EN;
+extern struct Gpio __code CPU_C10_GATE_N;
+extern struct Gpio __code DD_ON;
+extern struct Gpio __code DGPU_PWR_EN;
+extern struct Gpio __code EC_EN;
+extern struct Gpio __code EC_RSMRST_N;
+extern struct Gpio __code GC6_FB_EN;
+extern struct Gpio __code JACK_IN_N;
+extern struct Gpio __code LAN_WAKEUP_N;
+extern struct Gpio __code LED_ACIN;
+#define HAVE_LED_AIRPLANE_N 0
+extern struct Gpio __code LED_BAT_CHG;
+extern struct Gpio __code LED_BAT_FULL;
+extern struct Gpio __code LED_PWR;
+extern struct Gpio __code LID_SW_N;
+extern struct Gpio __code ME_WE;
+extern struct Gpio __code PCH_DPWROK_EC;
+extern struct Gpio __code PCH_PWROK_EC;
+#define HAVE_PM_PWROK 0
+extern struct Gpio __code PWR_BTN_N;
+extern struct Gpio __code PWR_SW_N;
+extern struct Gpio __code RGBKB_DET_N;
+extern struct Gpio __code SINK_CTRL;
+extern struct Gpio __code SLP_SUS_N;
+#define HAVE_SUS_PWR_ACK 0
+extern struct Gpio __code VA_EC_EN;
+extern struct Gpio __code WLAN_EN;
+extern struct Gpio __code WLAN_PWR_EN;
+extern struct Gpio __code XLP_OUT;
+
+#endif // _BOARD_GPIO_H

src/board/system76/common/acpi.c

@@ -3,12 +3,17 @@
 #include <board/acpi.h>
 #include <board/battery.h>
 #include <board/dgpu.h>
+#include <board/fan.h>
 #include <board/gpio.h>
 #include <board/kbled.h>
 #include <board/lid.h>
-#include <board/peci.h>
+#include <board/pwm.h>
 #include <common/debug.h>
-#include <ec/pwm.h>
+#include <common/macro.h>
+
+#if CONFIG_PLATFORM_INTEL
+#include <board/peci.h>
+#endif
 
 #ifndef HAVE_LED_AIRPLANE_N
 #define HAVE_LED_AIRPLANE_N 1
@@ -24,31 +29,48 @@ static uint8_t fbuf[4] = { 0, 0, 0, 0 };
 
 void fcommand(void) {
     switch (fcmd) {
-        // Keyboard backlight
-        case 0xCA:
-            switch (fdat) {
-                // Set white LED brightness
-                case 0x00:
-                    kbled_set(fbuf[0]);
-                    break;
-                // Get white LED brightness
-                case 0x01:
-                    fbuf[0] = kbled_get();
-                    break;
-                // Set LED color
-                case 0x03:
-                    kbled_set_color(
-                        ((uint32_t)fbuf[0]) |
-                        ((uint32_t)fbuf[1] << 16) |
-                        ((uint32_t)fbuf[2] << 8)
-                    );
-                    break;
-                // Set LED brightness
-                case 0x06:
-                    kbled_set(fbuf[0]);
-                    break;
-            }
+#if CONFIG_HAVE_KBLED
+    // Keyboard backlight
+    case 0xCA:
+        switch (fdat) {
+        // Set brightness
+        case 0:
+            kbled_set(fbuf[0]);
             break;
+        // Get brightness
+        case 1:
+            fbuf[0] = kbled_get();
+            break;
+        // Get type
+        case 2:
+            fbuf[0] = kbled_kind;
+            break;
+        // Set color
+        case 3:
+            kbled_set_color(
+                ((uint32_t)fbuf[0]) |
+                ((uint32_t)fbuf[1] << 16) |
+                ((uint32_t)fbuf[2] << 8)
+            );
+            break;
+        // Get color
+        case 4:
+            // uncrustify:off
+            {
+                uint32_t color = kbled_get_color();
+                fbuf[0] = color & 0xFF;
+                fbuf[1] = (color >> 16) & 0xFF;
+                fbuf[2] = (color >> 8) & 0xFF;
+            }
+            // uncrustify:on
+            break;
+        // DUPLICATE: Set brightness
+        case 6:
+            kbled_set(fbuf[0]);
+            break;
+        }
+        break;
+#endif // CONFIG_HAVE_KBLED
     }
 }
 
@@ -65,6 +87,7 @@ void acpi_reset(void) {
 #endif
 }
 
+// uncrustify:off
 uint8_t acpi_read(uint8_t addr) {
     uint8_t data = 0;
 
@@ -86,47 +109,53 @@ uint8_t acpi_read(uint8_t addr) {
         case 0x03:
             if (gpio_get(&LID_SW_N)) {
                 // Lid is open
-                data |= 1 << 0;
+                data |= BIT(0);
             }
             if (lid_wake) {
-                data |= 1 << 2;
+                data |= BIT(2);
             }
             break;
 
-        ACPI_8(0x07, peci_temp >> 6);
+#if CONFIG_PLATFORM_INTEL
+        ACPI_8(0x07, peci_temp);
+#endif
 
         // Handle AC adapter and battery present
         case 0x10:
             if (!gpio_get(&ACIN_N)) {
                 // AC adapter connected
-                data |= 1 << 0;
+                data |= BIT(0);
             }
-            if (battery_status & BATTERY_INITIALIZED) {
+            if (battery_info.status & BATTERY_INITIALIZED) {
                 // BAT0 connected
-                data |= 1 << 2;
+                data |= BIT(2);
             }
             break;
 
-        ACPI_16(0x16, battery_design_capacity);
-        ACPI_16(0x1A, battery_full_capacity);
-        ACPI_16(0x22, battery_design_voltage);
+        ACPI_16(0x16, battery_info.design_capacity);
+        ACPI_16(0x1A, battery_info.full_capacity);
+        ACPI_16(0x22, battery_info.design_voltage);
 
         case 0x26:
             // If AC adapter connected
             if (!gpio_get(&ACIN_N)) {
                 // And battery is not fully charged
-                if (battery_current != 0) {
+                if (battery_info.current != 0) {
                     // Battery is charging
-                    data |= 1 << 1;
+                    data |= BIT(1);
                 }
             }
             break;
 
-        ACPI_16(0x2A, battery_current);
-        ACPI_16(0x2E, battery_remaining_capacity);
-        ACPI_16(0x32, battery_voltage);
+        ACPI_16(0x2A, battery_info.current);
+        ACPI_16(0x2E, battery_info.remaining_capacity);
+        ACPI_16(0x32, battery_info.voltage);
 
-        ACPI_8(0x68, acpi_ecos);
+        ACPI_16(0x42, battery_info.cycle_count);
+
+        case 0x68:
+            data = acpi_ecos;
+            break;
 
         case 0xBC:
             data = battery_get_start_threshold();
@@ -138,86 +167,87 @@ uint8_t acpi_read(uint8_t addr) {
 
         ACPI_8(0xCC, sci_extra);
 
-        ACPI_8(0xCE, DCR2);
-        ACPI_8(0xD0, F1TLRR);
-        ACPI_8(0xD1, F1TMRR);
-#if HAVE_DGPU
+        ACPI_8(0xCE, fan1_pwm_actual);
+        ACPI_16(0xD0, fan1_rpm);
+#if CONFIG_HAVE_DGPU
         ACPI_8(0xCD, dgpu_temp);
-        ACPI_8(0xCF, DCR4);
-        ACPI_8(0xD2, F2TLRR);
-        ACPI_8(0xD3, F2TMRR);
-#endif // HAVE_DGPU
+#endif // CONFIG_HAVE_DGPU
+#ifdef FAN2_PWM
+        ACPI_8(0xCF, fan2_pwm_actual);
+        ACPI_16(0xD2, fan2_rpm);
+#endif // FAN2_PWM
 
 #if HAVE_LED_AIRPLANE_N
         // Airplane mode LED
         case 0xD9:
             if (!gpio_get(&LED_AIRPLANE_N)) {
-                data |= (1 << 6);
+                data |= BIT(6);
             }
             break;
 #endif // HAVE_LED_AIRPLANE_N
 
         // Set size of flash (from old firmware)
-        ACPI_8 (0xE5, 0x80);
+        ACPI_8(0xE5, 0x80);
 
-        ACPI_8 (0xF8, fcmd);
-        ACPI_8 (0xF9, fdat);
-        ACPI_8 (0xFA, fbuf[0]);
-        ACPI_8 (0xFB, fbuf[1]);
-        ACPI_8 (0xFC, fbuf[2]);
-        ACPI_8 (0xFD, fbuf[3]);
+        ACPI_8(0xF8, fcmd);
+        ACPI_8(0xF9, fdat);
+        ACPI_8(0xFA, fbuf[0]);
+        ACPI_8(0xFB, fbuf[1]);
+        ACPI_8(0xFC, fbuf[2]);
+        ACPI_8(0xFD, fbuf[3]);
     }
 
-    DEBUG("acpi_read %02X = %02X\n", addr, data);
+    TRACE("acpi_read %02X = %02X\n", addr, data);
     return data;
 }
+// uncrustify:on
 
 void acpi_write(uint8_t addr, uint8_t data) {
-    DEBUG("acpi_write %02X = %02X\n", addr, data);
+    TRACE("acpi_write %02X = %02X\n", addr, data);
 
     switch (addr) {
-        // Lid state and other flags
-        case 0x03:
-            lid_wake = (bool)(data & (1 << 2));
-            break;
+    // Lid state and other flags
+    case 0x03:
+        lid_wake = (bool)(data & BIT(2));
+        break;
 
-        case 0x68:
-            acpi_ecos = (enum EcOs)data;
-            break;
+    case 0x68:
+        acpi_ecos = (enum EcOs)data;
+        break;
 
-        case 0xBC:
-            battery_set_start_threshold(data);
-            break;
+    case 0xBC:
+        battery_set_start_threshold(data);
+        break;
 
-        case 0xBD:
-            battery_set_end_threshold(data);
-            break;
+    case 0xBD:
+        battery_set_end_threshold(data);
+        break;
 
 #if HAVE_LED_AIRPLANE_N
-        // Airplane mode LED
-        case 0xD9:
-            gpio_set(&LED_AIRPLANE_N, !(bool)(data & (1 << 6)));
-            break;
+    // Airplane mode LED
+    case 0xD9:
+        gpio_set(&LED_AIRPLANE_N, !(bool)(data & BIT(6)));
+        break;
 #endif
 
-        case 0xF8:
-            fcmd = data;
-            fcommand();
-            break;
-        case 0xF9:
-            fdat = data;
-            break;
-        case 0xFA:
-            fbuf[0] = data;
-            break;
-        case 0xFB:
-            fbuf[1] = data;
-            break;
-        case 0xFC:
-            fbuf[2] = data;
-            break;
-        case 0xFD:
-            fbuf[3] = data;
-            break;
+    case 0xF8:
+        fcmd = data;
+        fcommand();
+        break;
+    case 0xF9:
+        fdat = data;
+        break;
+    case 0xFA:
+        fbuf[0] = data;
+        break;
+    case 0xFB:
+        fbuf[1] = data;
+        break;
+    case 0xFC:
+        fbuf[2] = data;
+        break;
+    case 0xFD:
+        fbuf[3] = data;
+        break;
     }
 }

src/board/system76/common/battery.c

@@ -1,25 +1,17 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/battery.h>
+#include <board/gpio.h>
 #include <board/smbus.h>
 #include <common/debug.h>
 
-#define BATTERY_ADDRESS 0x0B
-#define CHARGER_ADDRESS 0x09
+struct battery_info battery_info = { 0 };
 
-// ChargeOption0 flags
-// Low Power Mode Enable
-#define SBC_EN_LWPWR        ((uint16_t)(1 << 15))
-// Watchdog Timer Adjust
-#define SBC_WDTMR_ADJ_175S  ((uint16_t)(0b11 << 13))
-// Switching Frequency
-#define SBC_PWM_FREQ_800KHZ ((uint16_t)(0b01 << 8))
-// IDCHG Amplifier Gain
-#define SBC_IDCHC_GAIN      ((uint16_t)(1 << 3))
+uint16_t battery_charger_input_current = CHARGER_INPUT_CURRENT;
 
 // Default values to disable battery charging thresholds
-#define BATTERY_START_DEFAULT   0
-#define BATTERY_END_DEFAULT     100
+#define BATTERY_START_DEFAULT 0
+#define BATTERY_END_DEFAULT 100
 
 // Represents a battery percentage level, below which charging will begin.
 // Valid values are [0, 100]
@@ -59,94 +51,25 @@ bool battery_set_end_threshold(uint8_t value) {
     return true;
 }
 
-// XXX: Assumption: ac_last is initialized high.
-static bool charger_enabled = false;
-
-int battery_charger_disable(void) {
-    int res = 0;
-
-    if (!charger_enabled) return 0;
-
-    // Set charge option 0 with 175s watchdog
-    res = smbus_write(
-        CHARGER_ADDRESS,
-        0x12,
-        SBC_EN_LWPWR |
-        SBC_WDTMR_ADJ_175S |
-        SBC_PWM_FREQ_800KHZ |
-        SBC_IDCHC_GAIN
-    );
-
-    // Disable charge current
-    res = smbus_write(CHARGER_ADDRESS, 0x14, 0);
-    if (res < 0) return res;
-
-    // Disable charge voltage
-    res = smbus_write(CHARGER_ADDRESS, 0x15, 0);
-    if (res < 0) return res;
-
-    // Disable input current
-    res = smbus_write(CHARGER_ADDRESS, 0x3F, 0);
-    if (res < 0) return res;
-
-    DEBUG("Charger disabled\n");
-    charger_enabled = false;
-    return 0;
-}
-
-int battery_charger_enable(void) {
-    int res = 0;
-
-    if (charger_enabled) return 0;
-
-    res = battery_charger_disable();
-    if (res < 0) return res;
-
-    // Set charge current in mA
-    res = smbus_write(CHARGER_ADDRESS, 0x14, CHARGER_CHARGE_CURRENT);
-    if (res < 0) return res;
-
-    // Set charge voltage in mV
-    res = smbus_write(CHARGER_ADDRESS, 0x15, CHARGER_CHARGE_VOLTAGE);
-    if (res < 0) return res;
-
-    // Set input current in mA
-    res = smbus_write(CHARGER_ADDRESS, 0x3F, CHARGER_INPUT_CURRENT);
-    if (res < 0) return res;
-
-    // Set charge option 0 with watchdog disabled
-    res = smbus_write(
-        CHARGER_ADDRESS,
-        0x12,
-        SBC_EN_LWPWR |
-        SBC_PWM_FREQ_800KHZ |
-        SBC_IDCHC_GAIN
-    );
-
-    DEBUG("Charger enabled\n");
-    charger_enabled = true;
-    return 0;
-}
-
 /**
  * Configure the charger based on charging threshold values.
  */
-int battery_charger_configure(void) {
+int16_t battery_charger_configure(void) {
     static bool should_charge = true;
+    bool ac_present = !gpio_get(&ACIN_N);
 
-    if (battery_get_end_threshold() == BATTERY_END_DEFAULT) {
-        // Stop threshold not configured: Always charge on AC.
-        should_charge = true;
-    }
-    else if (battery_charge >= battery_get_end_threshold()) {
+    if (!ac_present || (battery_info.status & BATTERY_FULLY_CHARGED)) {
+        // Always disable charger if:
+        // - AC is not plugged in, or
+        // - Battery is fully charged
+        should_charge = false;
+    } else if (battery_info.charge > battery_get_end_threshold()) {
         // Stop threshold configured: Stop charging at threshold.
         should_charge = false;
-    }
-    else if (battery_get_start_threshold() == BATTERY_START_DEFAULT) {
+    } else if (battery_get_start_threshold() == BATTERY_START_DEFAULT) {
         // Start threshold not configured: Always charge up to stop threshold.
         should_charge = true;
-    }
-    else if (battery_charge <= battery_get_start_threshold()) {
+    } else if (battery_info.charge < battery_get_start_threshold()) {
         // Start threshold configured: Start charging at threshold.
         should_charge = true;
     }
@@ -156,74 +79,33 @@ int battery_charger_configure(void) {
     return battery_charger_disable();
 }
 
-uint16_t battery_temp = 0;
-uint16_t battery_voltage = 0;
-uint16_t battery_current = 0;
-uint16_t battery_charge = 0;
-uint16_t battery_remaining_capacity = 0;
-uint16_t battery_full_capacity = 0;
-uint16_t battery_status = 0;
-uint16_t battery_design_capacity = 0;
-uint16_t battery_design_voltage = 0;
-
 void battery_event(void) {
-    int res = 0;
+    int16_t res = 0;
 
-    #define command(N, V) { \
+#define command(N, V) \
+    { \
         res = smbus_read(BATTERY_ADDRESS, V, &N); \
         if (res < 0) { \
             N = 0; \
         } \
     }
 
-    command(battery_temp, 0x08);
-    command(battery_voltage, 0x09);
-    command(battery_current, 0x0A);
-    command(battery_charge, 0x0D);
-    command(battery_remaining_capacity, 0x0F);
-    command(battery_full_capacity, 0x10);
-    command(battery_status, 0x16);
-    command(battery_design_capacity, 0x18);
-    command(battery_design_voltage, 0x19);
+    command(battery_info.temp, 0x08);
+    command(battery_info.voltage, 0x09);
+    command(battery_info.current, 0x0A);
+    command(battery_info.charge, 0x0D);
+    command(battery_info.remaining_capacity, 0x0F);
+    command(battery_info.full_capacity, 0x10);
+    command(battery_info.status, 0x16);
+    command(battery_info.cycle_count, 0x17);
+    command(battery_info.design_capacity, 0x18);
+    command(battery_info.design_voltage, 0x19);
 
-    #undef command
-}
+#undef command
 
-void battery_debug(void) {
-    uint16_t data = 0;
-    int res = 0;
+    TRACE("BAT %d mV %d mA\n", battery_info.voltage, battery_info.current);
 
-    #define command(N, A, V) { \
-        DEBUG("  " #N ": "); \
-        res = smbus_read(A, V, &data); \
-        if (res < 0) { \
-            DEBUG("ERROR %04X\n", -res); \
-        } else { \
-            DEBUG("%04X\n", data); \
-        } \
-    }
-
-    DEBUG("Battery:\n");
-    command(Temperature, BATTERY_ADDRESS, 0x08);
-    command(Voltage, BATTERY_ADDRESS, 0x09);
-    command(Current, BATTERY_ADDRESS, 0x0A);
-    command(Charge, BATTERY_ADDRESS, 0x0D);
-    command(Status, BATTERY_ADDRESS, 0x16);
-
-    DEBUG("Charger:\n");
-    command(ChargeOption0, CHARGER_ADDRESS, 0x12);
-    command(ChargeOption1, CHARGER_ADDRESS, 0x3B);
-    command(ChargeOption2, CHARGER_ADDRESS, 0x38);
-    command(ChargeOption3, CHARGER_ADDRESS, 0x37);
-    command(ChargeCurrent, CHARGER_ADDRESS, 0x14);
-    command(ChargeVoltage, CHARGER_ADDRESS, 0x15);
-    command(DishargeCurrent, CHARGER_ADDRESS, 0x39);
-    command(InputCurrent, CHARGER_ADDRESS, 0x3F);
-    command(ProchotOption0, CHARGER_ADDRESS, 0x3C);
-    command(ProchotOption1, CHARGER_ADDRESS, 0x3D);
-    command(ProchotStatus, CHARGER_ADDRESS, 0x3A);
-
-    #undef command
+    battery_charger_event();
 }
 
 void battery_reset(void) {

src/board/system76/common/charger/bq24780s.c

@@ -0,0 +1,215 @@
+// SPDX-License-Identifier: GPL-3.0-only
+//
+// TI BQ24780S Smart Charger
+// https://www.ti.com/lit/ds/symlink/bq24780s.pdf
+
+#include <board/battery.h>
+#include <board/smbus.h>
+#include <common/macro.h>
+#include <common/debug.h>
+
+// uncrustify:off
+
+// Registers
+#define REG_CHARGE_CURRENT 0x14
+#define REG_CHARGE_VOLTAGE 0x15
+#define REG_DISCHARGE_CURRENT 0x39
+#define REG_INPUT_CURRENT 0x3F
+#define REG_CHARGE_OPTION_0 0x12
+#define REG_CHARGE_OPTION_1 0x3B
+#define REG_CHARGE_OPTION_2 0x38
+#define REG_CHARGE_OPTION_3 0x37
+
+// ChargeOption0 flags
+// Low Power Mode Enable
+#define SBC_EN_LWPWR        ((uint16_t)(BIT(15)))
+// Watchdog Timer Adjust
+#define SBC_WDTMR_ADJ_175S  ((uint16_t)(0b11 << 13))
+// Switching Frequency
+#define SBC_PWM_FREQ_800KHZ ((uint16_t)(0b01 << 8))
+// IDCHG Amplifier Gain
+#define SBC_IDCHC_GAIN      ((uint16_t)(BIT(3)))
+
+// ChargeOption1 flags
+// Independent Comparator Deglitch
+#define SBC_CMP_DEG_1US     (0b01 << 4)
+// PMON Gain
+#define SBC_PMON_RATIO      BIT(9)
+// Adapter:Battery RSENSE ratio
+#define SBC_RSENSE_RATIO_1_1    (0b00 << 12)
+#define SBC_RSENSE_RATIO_2_1    (0b01 << 12)
+#define SBC_RSENSE_RATIO_1_2    (0b10 << 12)
+// Battery depletion threshold
+#define SBC_BAT_DEPL_VTH    (0b11 << 14)
+
+// Bits 0-5 are ignored. Bits 13-15 must be 0.
+#define CHARGE_CURRENT_MASK 0x1FC0
+
+#if CHARGER_BATTERY_RSENSE == 5
+    #define CHARGE_CURRENT (MIN((CHARGER_CHARGE_CURRENT >> 1), CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+#elif CHARGER_BATTERY_RSENSE == 10
+    #define CHARGE_CURRENT (MIN(CHARGER_CHARGE_CURRENT, CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+#elif CHARGER_BATTERY_RSENSE == 20
+    #define CHARGE_CURRENT (MIN((CHARGER_CHARGE_CURRENT << 1), CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+#else
+    #error Invalid battery RSENSE value
+#endif
+
+// Bits 0-3, 15 are ignored.
+#define CHARGE_VOLTAGE_MASK 0x7FF0
+#define CHARGE_VOLTAGE (MIN(CHARGER_CHARGE_VOLTAGE, CHARGE_VOLTAGE_MASK) & CHARGE_VOLTAGE_MASK)
+
+// Bits 0-6 are ignored. Bits 13-15 must be 0.
+#define INPUT_CURRENT_MASK 0x1F80
+
+#if CHARGER_ADAPTER_RSENSE == 5
+    #define INPUT_CURRENT(X) (MIN(((X) >> 1), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+#elif CHARGER_ADAPTER_RSENSE == 10
+    #define INPUT_CURRENT(X) (MIN((X), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+#elif CHARGER_ADAPTER_RSENSE == 20
+    #define INPUT_CURRENT(X) (MIN(((X) << 1), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+#else
+    #error Invalid adapter RSENSE value
+#endif
+
+#if (CHARGER_ADAPTER_RSENSE == 5 && CHARGER_BATTERY_RSENSE == 5) || \
+    (CHARGER_ADAPTER_RSENSE == 10 && CHARGER_BATTERY_RSENSE == 10) || \
+    (CHARGER_ADAPTER_RSENSE == 20 && CHARGER_BATTERY_RSENSE == 20)
+#define RSENSE_RATIO SBC_RSENSE_RATIO_1_1
+#elif (CHARGER_ADAPTER_RSENSE == 10 && CHARGER_BATTERY_RSENSE == 5) || \
+    (CHARGER_ADAPTER_RSENSE == 20 && CHARGER_BATTERY_RSENSE == 10)
+#define RSENSE_RATIO SBC_RSENSE_RATIO_2_1
+#elif (CHARGER_ADAPTER_RSENSE == 5 && CHARGER_BATTERY_RSENSE == 10) || \
+    (CHARGER_ADAPTER_RSENSE == 10 && CHARGER_BATTERY_RSENSE == 20)
+#define RSENSE_RATIO SBC_RSENSE_RATIO_1_2
+#else
+    #error Invalid adapter:battery RSENSE ratio
+#endif
+
+// uncrustify:on
+
+// XXX: Assumption: ac_last is initialized high.
+static bool charger_enabled = false;
+
+int16_t battery_charger_disable(void) {
+    int16_t res = 0;
+
+    if (!charger_enabled)
+        return 0;
+
+    // Set charge option 0 with 175s watchdog
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_0,
+        SBC_EN_LWPWR | SBC_WDTMR_ADJ_175S | SBC_PWM_FREQ_800KHZ | SBC_IDCHC_GAIN
+    );
+
+    // Disable charge current
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_CURRENT, 0);
+    if (res < 0)
+        return res;
+
+    // Disable charge voltage
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_VOLTAGE, 0);
+    if (res < 0)
+        return res;
+
+    // Disable input current
+    res = smbus_write(CHARGER_ADDRESS, REG_INPUT_CURRENT, 0);
+    if (res < 0)
+        return res;
+
+    DEBUG("Charger disabled\n");
+    charger_enabled = false;
+    return 0;
+}
+
+int16_t battery_charger_enable(void) {
+    int16_t res = 0;
+
+    if (charger_enabled)
+        return 0;
+
+    res = battery_charger_disable();
+    if (res < 0)
+        return res;
+
+    // Set charge current in mA
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_CURRENT, CHARGE_CURRENT);
+    if (res < 0)
+        return res;
+
+    // Set charge voltage in mV
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_VOLTAGE, CHARGE_VOLTAGE);
+    if (res < 0)
+        return res;
+
+    // Set input current in mA
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_INPUT_CURRENT,
+        INPUT_CURRENT(battery_charger_input_current)
+    );
+    if (res < 0)
+        return res;
+
+    // Set charge option 0 with watchdog disabled
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_0,
+        SBC_EN_LWPWR | SBC_PWM_FREQ_800KHZ | SBC_IDCHC_GAIN
+    );
+
+    // Set the RSENSE ratio
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_1,
+        SBC_CMP_DEG_1US | SBC_PMON_RATIO | RSENSE_RATIO | SBC_BAT_DEPL_VTH
+    );
+
+    DEBUG("Charger enabled\n");
+    charger_enabled = true;
+    return 0;
+}
+
+void battery_charger_event(void) {
+    //TODO: watchdog
+}
+
+void battery_debug(void) {
+    uint16_t data = 0;
+    int16_t res = 0;
+
+#define command(N, A, V) \
+    { \
+        DEBUG("  " #N ": "); \
+        res = smbus_read(A, V, &data); \
+        if (res < 0) { \
+            DEBUG("ERROR %04X\n", -res); \
+        } else { \
+            DEBUG("%04X\n", data); \
+        } \
+    }
+
+    DEBUG("Battery:\n");
+    command(Temperature, BATTERY_ADDRESS, 0x08);
+    command(Voltage, BATTERY_ADDRESS, 0x09);
+    command(Current, BATTERY_ADDRESS, 0x0A);
+    command(Charge, BATTERY_ADDRESS, 0x0D);
+    command(Status, BATTERY_ADDRESS, 0x16);
+
+    DEBUG("Charger (bq24780s):\n");
+    command(ChargeOption0, CHARGER_ADDRESS, REG_CHARGE_OPTION_0);
+    command(ChargeOption1, CHARGER_ADDRESS, REG_CHARGE_OPTION_1);
+    command(ChargeOption2, CHARGER_ADDRESS, REG_CHARGE_OPTION_2);
+    command(ChargeOption3, CHARGER_ADDRESS, REG_CHARGE_OPTION_3);
+    command(ChargeCurrent, CHARGER_ADDRESS, REG_CHARGE_CURRENT);
+    command(ChargeVoltage, CHARGER_ADDRESS, REG_CHARGE_VOLTAGE);
+    command(DishargeCurrent, CHARGER_ADDRESS, REG_DISCHARGE_CURRENT);
+    command(InputCurrent, CHARGER_ADDRESS, REG_INPUT_CURRENT);
+    command(ProchotOption0, CHARGER_ADDRESS, 0x3C);
+    command(ProchotOption1, CHARGER_ADDRESS, 0x3D);
+    command(ProchotStatus, CHARGER_ADDRESS, 0x3A);
+
+#undef command
+}

src/board/system76/common/charger/oz26786.c

@@ -0,0 +1,223 @@
+// SPDX-License-Identifier: GPL-3.0-only
+//
+// O2 Micro OZ26786
+// No public datasheet
+
+#include <board/battery.h>
+#include <board/smbus.h>
+#include <common/debug.h>
+#include <common/macro.h>
+
+// uncrustify:off
+
+// Registers
+#define REG_CHARGE_CURRENT 0x14
+#define REG_CHARGE_VOLTAGE 0x15
+#define REG_CHARGE_OPTION_1 0x3D
+    #define CHARGE_OPTION_1_600KHZ BIT(11)
+#define REG_CHARGE_OPTION_2 0x3B
+    #define CHARGE_OPTION_2_PSYS_EN BIT(11)
+#define REG_ADAPTER_CURRENT 0x3F
+
+// Bits 0-5, 13-15 are ignored.
+#define CHARGE_CURRENT_MASK 0x1FC0
+
+#if CHARGER_BATTERY_RSENSE == 5
+    #define CHARGE_CURRENT (MIN((CHARGER_CHARGE_CURRENT >> 1), CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+    // XXX: According to the datasheet, only 10 and 20 are valid.
+    #define BATTERY_RSENSE (RSENSE_10 << 8)
+#elif CHARGER_BATTERY_RSENSE == 10
+    #define CHARGE_CURRENT (MIN(CHARGER_CHARGE_CURRENT, CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+    #define BATTERY_RSENSE (RSENSE_10 << 8)
+#elif CHARGER_BATTERY_RSENSE == 20
+    #define CHARGE_CURRENT (MIN((CHARGER_CHARGE_CURRENT << 1), CHARGE_CURRENT_MASK) & CHARGE_CURRENT_MASK)
+    #define BATTERY_RSENSE (RSENSE_20 << 8)
+#else
+    #error Invalid battery RSENSE value
+#endif
+
+// Bits 0-3, 15 are ignored.
+#define CHARGE_VOLTAGE_MASK 0x7FF0
+#define CHARGE_VOLTAGE (MIN(CHARGER_CHARGE_VOLTAGE, CHARGE_VOLTAGE_MASK) & CHARGE_VOLTAGE_MASK)
+
+// Bits 0-6 are ignored. Bits 12-15 must be 0.
+#define INPUT_CURRENT_MASK 0x0F80
+
+#if CHARGER_ADAPTER_RSENSE == 5
+    #define INPUT_CURRENT(X) (MIN(((X) >> 2), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+    #define ADAPTER_RSENSE RSENSE_5
+#elif CHARGER_ADAPTER_RSENSE == 10
+    #define INPUT_CURRENT(X) (MIN(((X) >> 1), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+    #define ADAPTER_RSENSE RSENSE_10
+#elif CHARGER_ADAPTER_RSENSE == 20
+    #define INPUT_CURRENT(X) (MIN((X), INPUT_CURRENT_MASK) & INPUT_CURRENT_MASK)
+    #define ADAPTER_RSENSE RSENSE_20
+#else
+    #error Invalid adapter RSENSE value
+#endif
+
+// PSYS gain in nA/W
+#ifndef CHARGER_PSYS_GAIN
+    #define CHARGER_PSYS_GAIN 1000
+#endif
+#if CHARGER_PSYS_GAIN == 1000
+    #define CHARGE_OPTION_2_PSYS_GAIN (0 << 8)
+#elif CHARGER_PSYS_GAIN == 500
+    #define CHARGE_OPTION_2_PSYS_GAIN (1 << 8)
+#elif CHARGER_PSYS_GAIN == 250
+    #define CHARGE_OPTION_2_PSYS_GAIN (2 << 8)
+#elif CHARGER_PSYS_GAIN == 2000
+    #define CHARGE_OPTION_2_PSYS_GAIN (3 << 8)
+#else
+    #error Invalid CHARGER_PSYS_GAIN value
+#endif
+
+// uncrustify:on
+
+// Sense resistor values in milliohms.
+enum sense_resistor {
+    RSENSE_10 = 0,
+    RSENSE_20 = 1,
+    RSENSE_5 = 2,
+};
+
+// XXX: Assumption: ac_last is initialized high.
+static bool charger_enabled = false;
+
+int16_t battery_charger_disable(void) {
+    int16_t res = 0;
+
+    if (!charger_enabled)
+        return 0;
+
+    // Set charge option 1 to converter frequency 600 KHz
+    //TODO: needed when charging disabled?
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_1,
+        CHARGE_OPTION_1_600KHZ | ADAPTER_RSENSE | BATTERY_RSENSE
+    );
+    if (res < 0)
+        return res;
+
+    // Set charge option 2 to PSYS enable
+    //TODO: needed when charging disabled?
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_2,
+        CHARGE_OPTION_2_PSYS_EN | CHARGE_OPTION_2_PSYS_GAIN
+    );
+    if (res < 0)
+        return res;
+
+    // Disable charge current
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_CURRENT, 0);
+    if (res < 0)
+        return res;
+
+    // Disable charge voltage
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_VOLTAGE, 0);
+    if (res < 0)
+        return res;
+
+    // Disable input current
+    res = smbus_write(CHARGER_ADDRESS, REG_ADAPTER_CURRENT, 0);
+    if (res < 0)
+        return res;
+
+    DEBUG("Charger disabled\n");
+    charger_enabled = false;
+    return 0;
+}
+
+int16_t battery_charger_enable(void) {
+    int16_t res = 0;
+
+    if (charger_enabled)
+        return 0;
+
+    res = battery_charger_disable();
+    if (res < 0)
+        return res;
+
+    // Set charge option 1 to converter frequency 600 KHz
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_1,
+        CHARGE_OPTION_1_600KHZ | ADAPTER_RSENSE | BATTERY_RSENSE
+    );
+    if (res < 0)
+        return res;
+
+    // Set charge option 2 to PSYS enable
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_CHARGE_OPTION_2,
+        CHARGE_OPTION_2_PSYS_EN | CHARGE_OPTION_2_PSYS_GAIN
+    );
+    if (res < 0)
+        return res;
+
+    // Set charge current in mA
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_CURRENT, CHARGE_CURRENT);
+    if (res < 0)
+        return res;
+
+    // Set charge voltage in mV
+    res = smbus_write(CHARGER_ADDRESS, REG_CHARGE_VOLTAGE, CHARGE_VOLTAGE);
+    if (res < 0)
+        return res;
+
+    // Set input current in mA
+    res = smbus_write(
+        CHARGER_ADDRESS,
+        REG_ADAPTER_CURRENT,
+        INPUT_CURRENT(battery_charger_input_current)
+    );
+    if (res < 0)
+        return res;
+
+    DEBUG("Charger enabled\n");
+    charger_enabled = true;
+    return 0;
+}
+
+void battery_charger_event(void) {
+    // Avoid watchdog timeout
+    if (charger_enabled) {
+        // Set charge voltage in mV
+        smbus_write(CHARGER_ADDRESS, REG_CHARGE_VOLTAGE, CHARGE_VOLTAGE);
+    }
+}
+
+void battery_debug(void) {
+    uint16_t data = 0;
+    int16_t res = 0;
+
+#define command(N, A, V) \
+    { \
+        DEBUG("  " #N ": "); \
+        res = smbus_read(A, V, &data); \
+        if (res < 0) { \
+            DEBUG("ERROR %04X\n", -res); \
+        } else { \
+            DEBUG("%04X\n", data); \
+        } \
+    }
+
+    DEBUG("Battery:\n");
+    command(Temperature, BATTERY_ADDRESS, 0x08);
+    command(Voltage, BATTERY_ADDRESS, 0x09);
+    command(Current, BATTERY_ADDRESS, 0x0A);
+    command(Charge, BATTERY_ADDRESS, 0x0D);
+    command(Status, BATTERY_ADDRESS, 0x16);
+
+    DEBUG("Charger (oz26786):\n");
+    command(ChargeCurrent, CHARGER_ADDRESS, REG_CHARGE_CURRENT);
+    command(ChargeVoltage, CHARGER_ADDRESS, REG_CHARGE_VOLTAGE);
+    command(ChargeOption_1, CHARGER_ADDRESS, REG_CHARGE_OPTION_1);
+    command(ChargeOption_2, CHARGER_ADDRESS, REG_CHARGE_OPTION_2);
+    command(AdapterCurrent, CHARGER_ADDRESS, REG_ADAPTER_CURRENT);
+
+#undef command
+}

src/board/system76/common/common.mk

@@ -1,5 +1,30 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
+board-common-y += acpi.c
+board-common-y += battery.c
+board-common-y += config.c
+board-common-$(CONFIG_HAVE_DGPU) += dgpu.c
+board-common-y += ecpm.c
+board-common-$(CONFIG_BUS_ESPI) += espi.c
+board-common-y += fan.c
+board-common-y += gctrl.c
+board-common-y += kbc.c
+board-common-y += kbscan.c
+board-common-y += keymap.c
+board-common-y += lid.c
+board-common-y += main.c
+board-common-y += parallel.c
+board-common-y += pmc.c
+board-common-y += pnp.c
+board-common-y += ps2.c
+board-common-y += pwm.c
+board-common-y += scratch.c
+board-common-$(CONFIG_SECURITY) += security.c
+board-common-y += smbus.c
+board-common-y += smfi.c
+board-common-y += stdio.c
+board-common-y += wireless.c
+
 # Set log level
 # 0 - NONE
 # 1 - ERROR
@@ -15,20 +40,80 @@ CFLAGS+=-DLEVEL=4
 # Uncomment to enable I2C debug on 0x76
 #CFLAGS+=-DI2C_DEBUGGER=0x76
 
+ifeq ($(CONFIG_PLATFORM_INTEL),y)
+board-common-y += peci.c
+board-common-y += power/intel.c
+CFLAGS += -DCONFIG_PLATFORM_INTEL=1
+else ifeq ($(CONFIG_PLATFORM_AMD),y)
+board-common-y += power/amd.c
+CFLAGS += -DCONFIG_PLATFORM_AMD=1
+else
+$(error PLATFORM not specified)
+endif
+
+ifeq ($(CONFIG_SECURITY),y)
+CFLAGS+=-DCONFIG_SECURITY=1
+endif
+
 # Set external programmer
 PROGRAMMER=$(wildcard /dev/serial/by-id/usb-Arduino*)
 
+ifeq ($(CONFIG_BUS_ESPI),y)
+CFLAGS += -DCONFIG_BUS_ESPI=1
+
+# TODO: Use PECI over eSPI on all boards using eSPI
+ifeq ($(CONFIG_PECI_OVER_ESPI),y)
+CFLAGS += -DCONFIG_PECI_OVER_ESPI=1
+endif
+endif
+
+ifeq ($(CONFIG_HAVE_DGPU),y)
+CFLAGS += -DCONFIG_HAVE_DGPU=1
+endif
+
 # Include system76 common source
 SYSTEM76_COMMON_DIR=src/board/system76/common
-SRC+=$(wildcard $(SYSTEM76_COMMON_DIR)/*.c)
-INCLUDE+=$(wildcard $(SYSTEM76_COMMON_DIR)/include/common/*.h) $(SYSTEM76_COMMON_DIR)/common.mk
+INCLUDE += $(SYSTEM76_COMMON_DIR)/common.mk
 CFLAGS+=-I$(SYSTEM76_COMMON_DIR)/include
 
+# Set battery charging thresholds
+BATTERY_START_THRESHOLD?=90
+BATTERY_END_THRESHOLD?=100
+
+CFLAGS+=\
+	-DBATTERY_START_THRESHOLD=$(BATTERY_START_THRESHOLD) \
+	-DBATTERY_END_THRESHOLD=$(BATTERY_END_THRESHOLD)
+
+# Add charger
+CHARGER?=bq24780s
+board-common-y += charger/$(CHARGER).c
+
+# Add USB-PD
+ifeq ($(CONFIG_HAVE_USBPD),y)
+CFLAGS += -DCONFIG_HAVE_USBPD=1
+board-common-$(CONFIG_USBPD_TPS65987) += usbpd/tps65987.c
+endif
+
+# Add keyboard
+ifndef KEYBOARD
+$(error KEYBOARD is not set by the board)
+endif
+KEYBOARD_DIR=src/keyboard/system76/$(KEYBOARD)
+include $(KEYBOARD_DIR)/keyboard.mk
+
+# Add kbled
+ifeq ($(CONFIG_HAVE_KBLED),y)
+CFLAGS += -DCONFIG_HAVE_KBLED=1
+board-common-y += kbled/common.c
+board-common-y += kbled/$(KBLED).c
+endif
+
 # Add scratch ROM
 include $(SYSTEM76_COMMON_DIR)/scratch/scratch.mk
 
 # Add scratch ROM for flash access
 include $(SYSTEM76_COMMON_DIR)/flash/flash.mk
+board-common-y += flash/wrapper.c
 
 console_internal:
 	cargo build --manifest-path tool/Cargo.toml --release
@@ -39,6 +124,11 @@ console_external:
 	sleep 1 && echo C | sudo tee "$(PROGRAMMER)" &
 	sudo tio -b 1000000 -m INLCRNL -t "$(PROGRAMMER)"
 
+console_external_forced:
+	sudo test -c "$(PROGRAMMER)"
+	sleep 1 && echo F | sudo tee "$(PROGRAMMER)" &
+	sudo tio -b 1000000 -m INLCRNL -t "$(PROGRAMMER)"
+
 flash_internal: $(BUILD)/ec.rom
 	cargo build --manifest-path tool/Cargo.toml --release
 	sudo tool/target/release/system76_ectool flash $<

src/board/system76/common/dgpu.c

@@ -1,105 +1,43 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/dgpu.h>
-
-#if HAVE_DGPU
-
-#include <board/fan.h>
 #include <board/gpio.h>
 #include <board/power.h>
 #include <common/debug.h>
 #include <common/macro.h>
 #include <ec/i2c.h>
-#include <ec/pwm.h>
-
-// Fan speed is the lowest requested over HEATUP seconds
-#ifndef BOARD_DGPU_HEATUP
-    #define BOARD_DGPU_HEATUP 10
-#endif
-
-static uint8_t FAN_HEATUP[BOARD_DGPU_HEATUP] = { 0 };
-
-// Fan speed is the highest HEATUP speed over COOLDOWN seconds
-#ifndef BOARD_DGPU_COOLDOWN
-    #define BOARD_DGPU_COOLDOWN 10
-#endif
-
-static uint8_t FAN_COOLDOWN[BOARD_DGPU_COOLDOWN] = { 0 };
 
 int16_t dgpu_temp = 0;
 
-#define DGPU_TEMP(X) ((int16_t)(X))
-
-#define FAN_POINT(T, D) { .temp = DGPU_TEMP(T), .duty = PWM_DUTY(D) }
-
-// Fan curve with temperature in degrees C, duty cycle in percent
-static struct FanPoint __code FAN_POINTS[] = {
-#ifdef BOARD_DGPU_FAN_POINTS
-    BOARD_DGPU_FAN_POINTS
-#else
-    FAN_POINT(70, 40),
-    FAN_POINT(75, 50),
-    FAN_POINT(80, 60),
-    FAN_POINT(85, 65),
-    FAN_POINT(90, 65)
-#endif
-};
-
-static struct Fan __code FAN = {
-    .points = FAN_POINTS,
-    .points_size = ARRAY_SIZE(FAN_POINTS),
-    .heatup = FAN_HEATUP,
-    .heatup_size = ARRAY_SIZE(FAN_HEATUP),
-    .cooldown = FAN_COOLDOWN,
-    .cooldown_size = ARRAY_SIZE(FAN_COOLDOWN),
-    .interpolate = false,
-};
-
 void dgpu_init(void) {
     // Set up for i2c usage
     i2c_reset(&I2C_DGPU, true);
 }
 
-void dgpu_event(void) {
-    uint8_t duty;
-    if (power_state == POWER_STATE_S0 && gpio_get(&DGPU_PWR_EN) && !gpio_get(&GC6_FB_EN)) {
-        // Use I2CS if in S0 state
+bool dgpu_get_temp(int16_t *const data) {
+    if (gpio_get(&DGPU_PWR_EN) && !gpio_get(&GC6_FB_EN)) {
         int8_t rlts;
-        int res = i2c_get(&I2C_DGPU, 0x4F, 0x00, &rlts, 1);
+        int16_t res = i2c_get(&I2C_DGPU, 0x4F, 0x00, &rlts, 1);
         if (res == 1) {
-            dgpu_temp = (int16_t)rlts;
-            duty = fan_duty(&FAN, dgpu_temp);
+            *data = (int16_t)rlts;
+            return true;
         } else {
             DEBUG("DGPU temp error: %d\n", res);
-            // Default to 50% if there is an error
-            dgpu_temp = 0;
-            duty = PWM_DUTY(50);
+            *data = 0;
+            return false;
         }
-    } else {
-        // Turn fan off if not in S0 state or GPU power not on
-        dgpu_temp = 0;
-        duty = PWM_DUTY(0);
     }
 
-    if (fan_max) {
-        // Override duty if fans are manually set to maximum
-        duty = PWM_DUTY(100);
-    } else {
-        // Apply heatup and cooldown filters to duty
-        duty = fan_heatup(&FAN, duty);
-        duty = fan_cooldown(&FAN, duty);
-    }
-
-    if (duty != DCR4) {
-        DCR4 = duty;
-        DEBUG("DGPU temp=%d = %d\n", dgpu_temp, duty);
-    }
+    *data = 0;
+    return true;
 }
 
-#else
+void dgpu_read_temp(void) {
+    if (power_state == POWER_STATE_S0) {
+        if (dgpu_get_temp(&dgpu_temp)) {
+            return;
+        }
+    }
 
-void dgpu_init(void) {}
-
-void dgpu_event(void) {}
-
-#endif // HAVE_DGPU
+    dgpu_temp = 0;
+}

src/board/system76/common/ecpm.c

@@ -1,12 +1,13 @@
 // SPDX-License-Identifier: GPL-3.0-only
 
 #include <board/ecpm.h>
+#include <common/macro.h>
 
 void ecpm_init(void) {
     // Clock gate EGPC, CIR, and SWUC
-    CGCTRL2 |= (1 << 6) | (1 << 5) | (1 << 4);
+    CGCTRL2 |= BIT(6) | BIT(5) | BIT(4);
     // Clock gate UART, SSPI, and DBGR
-    CGCTRL3 |= (1 << 2) | (1 << 1) | (1 << 0);
+    CGCTRL3 |= BIT(2) | BIT(1) | BIT(0);
     // Clock gate CEC
-    CGCTRL4 |= (1 << 0);
+    CGCTRL4 |= BIT(0);
 }