From d7173967087e022d20d1f9c812b1b668e9d3f71b Mon Sep 17 00:00:00 2001
From: Stefan Kerkmann <karlk90@pm.me>
Date: Thu, 30 Jun 2022 13:19:27 +0200
Subject: [Core] Add Raspberry Pi RP2040 support (#14877)

* Disable RESET keycode because of naming conflicts

* Add Pico SDK as submodule

* Add RP2040 build support to QMK

* Adjust USB endpoint structs for RP2040

* Add RP2040 bootloader and double-tap reset routine

* Add generic and pro micro RP2040 boards

* Add RP2040 onekey keyboard

* Add WS2812 PIO DMA enabled driver and documentation

Supports regular and open-drain output configuration. RP2040 GPIOs are
sadly not 5V tolerant, so this is a bit use-less or needs extra hardware
or you take the risk to fry your hardware.

* Adjust SIO Driver for RP2040

* Adjust I2C Driver for RP2040

* Adjust SPI Driver for RP2040

* Add PIO serial driver and documentation

* Add general RP2040 documentation

* Apply suggestions from code review

Co-authored-by: Nick Brassel <nick@tzarc.org>

Co-authored-by: Nick Brassel <nick@tzarc.org>
---
 builddefs/bootloader.mk      |  4 ++++
 builddefs/common_features.mk |  4 ++--
 builddefs/mcu_selection.mk   | 35 +++++++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 2 deletions(-)

(limited to 'builddefs')

diff --git a/builddefs/bootloader.mk b/builddefs/bootloader.mk
index eba8e280e4..3d4c03b01c 100644
--- a/builddefs/bootloader.mk
+++ b/builddefs/bootloader.mk
@@ -200,6 +200,10 @@ ifeq ($(strip $(BOOTLOADER)), tinyuf2)
     OPT_DEFS += -DBOOTLOADER_TINYUF2
     BOOTLOADER_TYPE = tinyuf2
 endif
+ifeq ($(strip $(BOOTLOADER)), rp2040)
+    OPT_DEFS += -DBOOTLOADER_RP2040
+    BOOTLOADER_TYPE = rp2040
+endif
 ifeq ($(strip $(BOOTLOADER)), halfkay)
     OPT_DEFS += -DBOOTLOADER_HALFKAY
     BOOTLOADER_TYPE = halfkay
diff --git a/builddefs/common_features.mk b/builddefs/common_features.mk
index b447c6743d..2edc1bdef0 100644
--- a/builddefs/common_features.mk
+++ b/builddefs/common_features.mk
@@ -547,7 +547,7 @@ ifeq ($(strip $(BACKLIGHT_ENABLE)), yes)
     endif
 endif
 
-VALID_WS2812_DRIVER_TYPES := bitbang pwm spi i2c
+VALID_WS2812_DRIVER_TYPES := bitbang pwm spi i2c vendor
 
 WS2812_DRIVER ?= bitbang
 ifeq ($(strip $(WS2812_DRIVER_REQUIRED)), yes)
@@ -637,7 +637,7 @@ ifneq ($(strip $(DEBOUNCE_TYPE)), custom)
 endif
 
 
-VALID_SERIAL_DRIVER_TYPES := bitbang usart
+VALID_SERIAL_DRIVER_TYPES := bitbang usart vendor
 
 SERIAL_DRIVER ?= bitbang
 ifeq ($(filter $(SERIAL_DRIVER),$(VALID_SERIAL_DRIVER_TYPES)),)
diff --git a/builddefs/mcu_selection.mk b/builddefs/mcu_selection.mk
index d5fb731e08..d676e0c06a 100644
--- a/builddefs/mcu_selection.mk
+++ b/builddefs/mcu_selection.mk
@@ -116,6 +116,41 @@ ifneq ($(findstring MK66FX1M0, $(MCU)),)
   BOARD ?= PJRC_TEENSY_3_6
 endif
 
+ifneq ($(findstring RP2040, $(MCU)),)
+  # Cortex version
+  MCU = cortex-m0plus
+
+  # ARM version, CORTEX-M0/M1 are 6, CORTEX-M3/M4/M7 are 7
+  CHIBIOS_PORT = ARMv6-M-RP2
+
+  ## chip/board settings
+  # - the next two should match the directories in
+  #   <chibios[-contrib]>/os/hal/ports/$(MCU_PORT_NAME)/$(MCU_SERIES)
+  #   OR
+  #   <chibios[-contrib]>/os/hal/ports/$(MCU_FAMILY)/$(MCU_SERIES)
+  MCU_FAMILY = RP
+  MCU_SERIES = RP2040
+
+  # Linker script to use
+  # - it should exist either in <chibios>/os/common/ports/ARMCMx/compilers/GCC/ld/
+  #   or <keyboard_dir>/ld/
+  STARTUPLD_CONTRIB = $(CHIBIOS_CONTRIB)/os/common/startup/ARMCMx/compilers/GCC/ld
+  MCU_LDSCRIPT ?= RP2040_FLASH
+  LDFLAGS += -L $(STARTUPLD_CONTRIB)
+
+  # Startup code to use
+  #  - it should exist in <chibios>/os/common/startup/ARMCMx/compilers/GCC/mk/
+  MCU_STARTUP ?= rp2040
+
+  # Board: it should exist either in <chibios>/os/hal/boards/,
+  # <keyboard_dir>/boards/, or drivers/boards/
+  BOARD ?= GENERIC_PROMICRO_RP2040
+
+  # Default UF2 Bootloader settings
+  UF2_FAMILY ?= RP2040
+  FIRMWARE_FORMAT ?= uf2
+endif
+
 ifneq ($(findstring STM32F042, $(MCU)),)
   # Cortex version
   MCU = cortex-m0
-- 
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