RP2040 basic support (draft)

soc/arm/raspberrypi/CMakeLists.txt

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory(${SOC_SERIES})

soc/arm/raspberrypi/Kconfig

@@ -0,0 +1,16 @@
+# Raspberry Pi (RP) MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_FAMILY_RASPBERRY_PI
+	bool
+
+if SOC_FAMILY_RASPBERRY_PI
+config SOC_FAMILY
+	string
+	default "raspberry_pi_rp"
+
+source "soc/arm/raspberry_pi/*/Kconfig.soc"
+
+endif # SOC_FAMILY_RASPBERRY_PI

soc/arm/raspberrypi/Kconfig.defconfig

@@ -0,0 +1,10 @@
+# Raspberry Pi (RP) MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_FAMILY_RASPBERRY_PI
+
+source "soc/arm/raspberry_pi/*/Kconfig.defconfig.series"
+
+endif # SOC_FAMILY_RASPBERRY_PI

soc/arm/raspberrypi/Kconfig.soc

@@ -0,0 +1,6 @@
+# Raspberry Pi (RP) MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+source "soc/arm/raspberry_pi/*/Kconfig.series"

soc/arm/raspberrypi/rp20/CMakeLists.txt

@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(
+  soc.c
+  )
+
+zephyr_library_include_directories(
+  ${ZEPHYR_BASE}/kernel/include
+  ${ZEPHYR_BASE}/arch/arm/include
+  )

soc/arm/raspberrypi/rp20/Kconfig.defconfig.rp2040

@@ -0,0 +1,8 @@
+# # Raspberry Pi RP2040 MCU
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC
+	default "rp2040"
+	depends on SOC_RP2040

soc/arm/raspberrypi/rp20/Kconfig.defconfig.series

@@ -0,0 +1,16 @@
+# Raspberry Pi RP20XX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_SERIES_RP20XX
+
+source "soc/arm/raspberry_pi/rp20/Kconfig.defconfig.rp20*"
+
+config SOC_SERIES
+	default "rp2040"
+
+config NUM_IRQS
+	default 26
+
+endif # SOC_SERIES_RP20XX

soc/arm/raspberrypi/rp20/Kconfig.series

@@ -0,0 +1,16 @@
+# Raspberry Pi RP20XX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_RP20XX
+	bool "Raspberry Pi RP20 series MCU"
+	select ARM
+	select CPU_CORTEX_M0_PLUS
+	select CPU_CORTEX_M_HAS_SYSTICK
+	select CPU_CORTEX_M_HAS_VTOR
+	select CPU_HAS_ARM_MPU
+	select SOC_FAMILY_RASPBERRY_PI
+	select XIP
+	help
+	  Enable support for Raspberry Pi RP20 MCU series

soc/arm/raspberrypi/rp20/Kconfig.soc

@@ -0,0 +1,13 @@
+# Raspberry Pi RP20XX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+choice
+	prompt "RP20xx MCU Selection"
+	depends on SOC_SERIES_RP20XX
+
+config SOC_RP2040
+	bool "Raspberry Pi RP2040"
+
+endchoice

soc/arm/raspberrypi/rp20/linker.ld

@@ -0,0 +1,9 @@
+/* linker.ld - Linker command/script file */
+
+/*
+ * Copyright (c) 2014 Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arch/arm/aarch32/cortex_m/scripts/linker.ld>

soc/arm/raspberrypi/rp20/soc.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file
+ * @brief System/hardware module for Raspberry Pi RP2040 family processor
+ *
+ * This module provides routines to initialize and support board-level hardware
+ * for the Raspberry Pi RP2040 family processor.
+ */
+
+#include <kernel.h>
+#include <init.h>
+#include <logging/log.h>
+
+#ifdef CONFIG_RUNTIME_NMI
+extern void z_arm_nmi_init(void);
+#define NMI_INIT() z_arm_nmi_init()
+#else
+#define NMI_INIT()
+#endif
+
+//#include <system_nrf51.h>
+#define LOG_LEVEL CONFIG_SOC_LOG_LEVEL
+LOG_MODULE_REGISTER(soc);
+
+/* Overrides the weak ARM implementation:
+   Set general purpose retention register and reboot */
+void sys_arch_reboot(int type)
+{
+	NVIC_SystemReset();
+}
+
+static int raspberry_pi_rp2040_init(const struct device *arg)
+{
+	uint32_t key;
+
+	ARG_UNUSED(arg);
+
+	key = irq_lock();
+
+	/* Install default handler that simply resets the CPU
+	 * if configured in the kernel, NOP otherwise
+	 */
+	NMI_INIT();
+
+	irq_unlock(key);
+
+	return 0;
+}
+
+void z_platform_init(void)
+{
+	SystemInit();
+}
+
+SYS_INIT(raspberry_pi_rp2040_init, PRE_KERNEL_1, 0);

soc/arm/raspberrypi/rp20/soc.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2016 Linaro Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file SoC configuration macros for the Raspberry Pi RP2040 family processors
+ */
+
+#ifndef _RASPBERRY_PI_RP2040_SOC_H_
+#define _RASPBERRY_PI_RP2040_SOC_H_
+
+#include "../soc_rp_common.h"
+
+#endif /* _RASPBERRY_PI_RP2040_SOC_H_ */