boards: bflb: Introduce AI-WB2-12F

This introduces the Ai-Thinker BL602 WB2 development board

Signed-off-by: Camille BAUD <mail@massdriver.space>

boards/aithinker/ai_wb2_12f/Kconfig.ai_wb2_12f

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+# Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_AI_WB2_12F
+	select SOC_BL602C00Q2I

boards/aithinker/ai_wb2_12f/ai_wb2_12f-pinctrl.dtsi

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+/*
+ * Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <dt-bindings/pinctrl/bl602x-pinctrl.h>
+
+&pinctrl {
+	uart0_default: uart0_default {
+		group1 {
+			pinmux = <GPIO7_UART0_RX>,
+				 <GPIO16_UART0_TX>;
+			bias-pull-up;
+			input-schmitt-enable;
+		};
+	};
+
+	uart0_sleep: uart0_sleep {
+		group1 {
+			pinmux = <GPIO7_UART0_RX>,
+				 <GPIO16_UART0_TX>;
+			bias-high-impedance;
+		};
+	};
+};

boards/aithinker/ai_wb2_12f/ai_wb2_12f.dts

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+/*
+ * Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include <bflb/bl60x.dtsi>
+#include "ai_wb2_12f-pinctrl.dtsi"
+
+/ {
+	model = "Ai-Thinker WB2-12F development board";
+	compatible = "bflb,bl602";
+
+	chosen {
+		zephyr,flash = &flash0;
+		zephyr,itcm = &itcm;
+		zephyr,dtcm = &dtcm;
+		zephyr,sram = &sram0;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+	};
+};
+
+&cpu0 {
+	clock-frequency = <DT_FREQ_M(192)>;
+};
+
+&spi1 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	reg = <0x4000b000 0x1000 0x23000000 0x400000>;
+
+	flash0: flash@0 {
+		compatible = "zb,25vq32", "jedec,spi-nor";
+		status = "disabled";
+		size = <DT_SIZE_M(128)>;
+		jedec-id = [5e 40 16];
+		reg = <0>;
+		spi-max-frequency = <DT_FREQ_M(133)>;
+	};
+};
+
+&uart0 {
+	status = "okay";
+	current-speed = <115200>;
+
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-1 = <&uart0_sleep>;
+	pinctrl-names = "default", "sleep";
+};

boards/aithinker/ai_wb2_12f/ai_wb2_12f.yaml

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+# Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+#
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: ai_wb2_12f
+name: Ai-Thinker WB2-12F development board
+type: mcu
+arch: riscv
+ram: 64
+toolchain:
+  - zephyr
+testing:
+  ignore_tags:
+    - net
+    - bluetooth
+supported:
+  - pinctrl
+  - uart
+vendor: bflb

boards/aithinker/ai_wb2_12f/ai_wb2_12f_defconfig

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+# Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+#
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+
+CONFIG_UART_CONSOLE=y

boards/aithinker/ai_wb2_12f/board.cmake

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+# Copyright (c) 2024-2025 MASSDRIVER EI (massdriver.space)
+#
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(openocd --cmd-pre-init "source [find bl60x.cfg]")
+
+board_runner_args(openocd --use-elf --no-load --no-init)
+board_runner_args(openocd --gdb-init "set mem inaccessible-by-default off")
+board_runner_args(openocd --gdb-init "set architecture riscv:rv32")
+board_runner_args(openocd --gdb-init "set remotetimeout 250")
+board_runner_args(openocd --gdb-init "set print asm-demangle on")
+board_runner_args(openocd --gdb-init "set backtrace limit 32")
+board_runner_args(openocd --gdb-init "mem 0x22008000 0x22014000 rw")
+board_runner_args(openocd --gdb-init "mem 0x42008000 0x42014000 rw")
+board_runner_args(openocd --gdb-init "mem 0x22014000 0x22020000 rw")
+board_runner_args(openocd --gdb-init "mem 0x42014000 0x42020000 rw")
+board_runner_args(openocd --gdb-init "mem 0x22020000 0x2203C000 rw")
+board_runner_args(openocd --gdb-init "mem 0x42020000 0x4203C000 rw")
+board_runner_args(openocd --gdb-init "mem 0x23000000 0x23400000 ro")
+include(${ZEPHYR_BASE}/boards/common/openocd.board.cmake)

boards/aithinker/ai_wb2_12f/board.yml

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+board:
+  name: ai_wb2_12f
+  full_name: Ai-Thinker WB2-12F development board
+  vendor: bflb
+  socs:
+    - name: bl602c00q2i

boards/aithinker/ai_wb2_12f/doc/index.rst

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+.. zephyr:board:: ai_wb2_12f
+
+Overview
+********
+
+BL602/BL604 is a Wi-Fi+BLE chipset introduced by Bouffalo Lab, which is used
+for low power consumption and high performance application development.  The
+wireless subsystem includes 2.4G radio, Wi-Fi 802.11b/g/n and BLE 5.0
+baseband/MAC design.  The microcontroller subsystem includes a 32-bit RISC CPU
+with low power consumption, cache and memory.  The power management unit
+controls the low power consumption mode.  In addition, it also supports
+various security features.  The external interfaces include SDIO, SPI, UART,
+I2C, IR remote, PWM, ADC, DAC, PIR and GPIO.
+
+This WB2 (BL602) 12F format Module Development Board features a SiFive E24 32 bit
+RISC-V CPU with FPU, it supports High Frequency clock up to 192Mhz, have 128k ROM, 276kB RAM,
+2.4 GHz WIFI 1T1R mode, support 20 MHz, data rate up to 72.2 Mbps, BLE 5.0
+with 2MB phy.  It is a secure MCU which supports Secure boot, ECC-256 signed
+image, QSPI/SPI Flash On-The-Fly AES Decryption and PKA (Public Key
+Accelerator).
+
+Hardware
+********
+
+For more information about the Bouffalo Lab BL-60x MCU:
+
+- `Bouffalo Lab BL60x MCU Website`_
+- `Bouffalo Lab BL60x MCU Datasheet`_
+- `Bouffalo Lab Development Zone`_
+- `ai_wb2_12f Schematics`_
+- `The RISC-V BL602 Book`_
+
+Supported Features
+==================
+
+.. zephyr:board-supported-hw::
+
+System Clock
+============
+
+The WB2 (BL602) Development Board is configured to run at max speed (192MHz).
+
+Serial Port
+===========
+
+The ``ai_wb2_12f`` board uses UART0 as default serial port.  It is connected
+to USB Serial converter and port is used for both program and console.
+
+
+Programming and Debugging
+*************************
+
+Samples
+=======
+
+#. Build the Zephyr kernel and the :zephyr:code-sample:`hello_world` sample
+application:
+
+   .. zephyr-app-commands::
+      :zephyr-app: samples/hello_world
+      :board: ai_wb2_12f
+      :goals: build flash
+
+#. Run your favorite terminal program to listen for output. Under Linux the
+   terminal should be :code:`/dev/ttyUSB0`. For example:
+
+   .. code-block:: console
+
+      $ screen /dev/ttyUSB0 115200
+
+   The -o option tells minicom not to send the modem initialization
+   string. Connection should be configured as follows:
+
+      - Speed: 115200
+      - Data: 8 bits
+      - Parity: None
+      - Stop bits: 1
+
+   Then, press and release RST button
+
+   .. code-block:: console
+
+      *** Booting Zephyr OS build v4.1.0 ***
+      Hello World! ai_wb2_12f/bl602c00q2i
+
+Congratulations, you have ``ai_wb2_12f`` configured and running Zephyr.
+
+
+.. _Bouffalo Lab BL60x MCU Website:
+	https://en.bouffalolab.com/product/?type=detail&id=6
+
+.. _Bouffalo Lab BL60x MCU Datasheet:
+	https://github.com/bouffalolab/bl_docs/tree/main/BL602_DS/en
+
+.. _Bouffalo Lab Development Zone:
+	https://dev.bouffalolab.com/home?id=guest
+
+.. _ai_wb2_12f Schematics:
+   https://docs.ai-thinker.com/en/wb2
+
+.. _The RISC-V BL602 Book:
+	https://lupyuen.github.io/articles/book
+
+.. _Flashing Firmware to BL602:
+	https://lupyuen.github.io/articles/book#flashing-firmware-to-bl602

boards/aithinker/ai_wb2_12f/support/bl60x.cfg

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+# Copyright (c) 2022-2025 ATL Electronics
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if { [info exists CHIPNAME] } {
+    set _CHIPNAME $CHIPNAME
+} else {
+    set _CHIPNAME riscv
+}
+
+if { [info exists WORKAREASIZE] } {
+    set _WORKAREASIZE $WORKAREASIZE
+} else {
+    set _WORKAREASIZE 0x10000
+}
+
+if { [info exists WORKAREAADDR] } {
+    set _WORKAREAADDR $WORKAREAADDR
+} else {
+    set _WORKAREAADDR 0x22020000
+}
+
+if { [info exists CPUTAPID] } {
+    set _CPUTAPID $CPUTAPID
+} else {
+    set _CPUTAPID 0x20000c05
+}
+
+transport select jtag
+jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME.0 riscv -chain-position $_TARGETNAME
+
+$_TARGETNAME.0 configure -work-area-phys $_WORKAREAADDR -work-area-size $_WORKAREASIZE -work-area-backup 1
+
+echo "Ready for Remote Connections"
+
+$_TARGETNAME.0 configure -event reset-assert-pre {
+    echo "reset-assert-pre"
+    adapter speed 100
+}
+
+$_TARGETNAME.0 configure -event reset-deassert-post {
+    echo "reset-deassert-post"
+
+    adapter speed 100
+
+    reg mstatus 0x7800
+    reg mie 0x0
+#    reg pc 0x23000000
+}
+
+$_TARGETNAME.0 configure -event reset-init {
+    echo "reset-init"
+
+    adapter speed 3000
+}
+
+$_TARGETNAME.0 configure -event gdb-attach {
+        echo "Debugger attaching: halting execution"
+        reset halt
+        gdb_breakpoint_override hard
+}
+
+$_TARGETNAME.0 configure -event gdb-detach {
+        echo "Debugger detaching: resuming execution"
+        resume
+}
+
+gdb_memory_map enable
+gdb_flash_program enable
+
+# 'progbuf', 'sysbus' or 'abstract'
+riscv set_mem_access sysbus
+riscv set_command_timeout_sec 1
+
+init
+reset init

boards/aithinker/ai_wb2_12f/support/openocd.cfg

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+# For WCH linkE in DAP mode
+
+interface cmsis-dap
+
+adapter speed 1000

boards/aithinker/index.rst

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+.. _boards-aithinker:
+
+Ai-Thinker Co.
+##############
+
+.. toctree::
+   :maxdepth: 1
+   :glob:
+
+   **/*