soc: Added support for Raspberry Pi's RP2040 SoC

yonsch · yonsch · commit a3aca2f41a78 · 2021-05-07T14:14:54.000+03:00
Signed-off-by: Yonatan Schachter &lt;yonatan.schachter@gmail.com&gt;
Signed-off-by: Ioannis Glaropoulos &lt;Ioannis.Glaropoulos@nordicsemi.no&gt;
diff --git a/CODEOWNERS b/CODEOWNERS
@@ -44,6 +44,7 @@
 /soc/arm/nuvoton/                         @ssekar15
 /soc/arm/nuvoton_npcx/                    @MulinChao @WealianLiao @ChiHuaL
 /soc/arm/quicklogic_eos_s3/               @kowalewskijan @kgugala
+/soc/arm/raspberrypi/                     @yonsch
 /soc/arm/silabs_exx32/efm32pg1b/          @rdmeneze
 /soc/arm/silabs_exx32/efr32mg21/          @l-alfred
 /soc/arm/st_stm32/                        @erwango
@@ -357,6 +358,7 @@
 /dts/arm/nuvoton/npcx/                    @MulinChao @WealianLiao @ChiHuaL
 /dts/arm/nxp/                             @MaureenHelm @mmahadevan108 @dleach02
 /dts/arm/microchip/                       @franciscomunoz @albertofloyd @scottwcpg
+/dts/arm/raspberrypi/                     @yonsch
 /dts/arm/silabs/efm32_pg_1b.dtsi          @rdmeneze
 /dts/arm/silabs/efm32gg11b*               @oanerer
 /dts/arm/silabs/efm32_jg_pg*              @chrta
diff --git a/dts/arm/raspberrypi/rp2040.dtsi b/dts/arm/raspberrypi/rp2040.dtsi
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2021 Yonatan Schachter
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arm/armv6-m.dtsi>
+#include <dt-bindings/gpio/gpio.h>
+#include <mem.h>
+
+/ {
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu0: cpu@0 {
+			compatible = "arm,cortex-m0+";
+			reg = <0>;
+		};
+
+		cpu1: cpu@1 {
+			compatible = "arm,cortex-m0+";
+			reg = <1>;
+		};
+	};
+
+	sram0: memory@20000000 {
+		compatible = "mmio-sram";
+		reg = <0x20000000 DT_SIZE_K(264)>;
+	};
+
+	/* Flash starts at 0x10000000 but the first 0x100 bytes
+	 * are reserved for the second stage bootloader
+	 */
+	flash0: flash@10000100 {
+		compatible = "soc-nv-flash";
+		label = "FLASH_RP2";
+
+		write-block-size = <1>;
+	};
+
+	clk_peri: uart-clock {
+		compatible = "fixed-clock";
+		clock-frequency = <125000000>;
+		#clock-cells = <0>;
+	};
+
+	soc {
+		uart0: uart@40034000 {
+			compatible = "raspberrypi,rp2-uart";
+			reg = <0x40034000 DT_SIZE_K(4)>;
+			clocks = <&clk_peri>;
+			interrupts = <20 3>;
+			interrupt-names = "uart0";
+			label = "UART_0";
+			status = "disabled";
+		};
+
+		uart1: uart@40038000 {
+			compatible = "raspberrypi,rp2-uart";
+			reg = <0x40038000 DT_SIZE_K(4)>;
+			clocks = <&clk_peri>;
+			interrupts = <21 3>;
+			interrupt-names = "uart1";
+			label = "UART_1";
+			status = "disabled";
+		};
+	};
+};
+
+&nvic {
+	arm,num-irq-priority-bits = <3>;
+};
diff --git a/modules/Kconfig b/modules/Kconfig
@@ -23,6 +23,7 @@ source "modules/Kconfig.mcux"
 source "modules/Kconfig.microchip"
 source "modules/Kconfig.nuvoton"
 source "modules/Kconfig.open-amp"
+source "modules/Kconfig.raspberrypi"
 source "modules/Kconfig.silabs"
 source "modules/Kconfig.simplelink"
 source "modules/Kconfig.sof"
diff --git a/modules/Kconfig.raspberrypi b/modules/Kconfig.raspberrypi
@@ -0,0 +1,5 @@
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+config HAS_RASPBERRYPI
+	bool
diff --git a/soc/arm/raspberrypi/CMakeLists.txt b/soc/arm/raspberrypi/CMakeLists.txt
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: Apache-2.0
+
+add_subdirectory(${SOC_SERIES})
diff --git a/soc/arm/raspberrypi/Kconfig b/soc/arm/raspberrypi/Kconfig
@@ -0,0 +1,17 @@
+# Raspberry Pi (RP) MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_FAMILY_RASPBERRY_PI
+	bool
+
+if SOC_FAMILY_RASPBERRY_PI
+config SOC_FAMILY
+	string
+	default "raspberrypi"
+
+source "soc/arm/raspberrypi/*/Kconfig.soc"
+
+endif # SOC_FAMILY_RASPBERRY_PI
diff --git a/soc/arm/raspberrypi/Kconfig.defconfig b/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/raspberrypi/*/Kconfig.defconfig.series"
+
+endif # SOC_FAMILY_RASPBERRY_PI
diff --git a/soc/arm/raspberrypi/Kconfig.soc b/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/raspberrypi/*/Kconfig.series"
diff --git a/soc/arm/raspberrypi/rp2/CMakeLists.txt b/soc/arm/raspberrypi/rp2/CMakeLists.txt
@@ -0,0 +1,14 @@
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(
+  soc.c
+  rp2_init.c
+  )
+
+zephyr_library_include_directories(
+  ${ZEPHYR_BASE}/kernel/include
+  ${ZEPHYR_BASE}/arch/arm/include
+  )
diff --git a/soc/arm/raspberrypi/rp2/Kconfig.defconfig.rp2040 b/soc/arm/raspberrypi/rp2/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
diff --git a/soc/arm/raspberrypi/rp2/Kconfig.defconfig.series b/soc/arm/raspberrypi/rp2/Kconfig.defconfig.series
@@ -0,0 +1,46 @@
+# Raspberry Pi RP20XX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_SERIES_RP2XXX
+
+source "soc/arm/raspberrypi/rp2/Kconfig.defconfig.rp2*"
+
+config SOC_SERIES
+	default "rp2"
+
+config NUM_IRQS
+	default 26
+
+choice
+	prompt "Raspberry Pi flash type"
+
+config RP2_FLASH_W25Q080
+	bool "W25Q080"
+
+config RP2_FLASH_GENERIC_03H
+	bool "Generic 03H"
+
+config RP2_FLASH_IS25LP080
+	bool "IS25LP080"
+
+config RP2_FLASH_W25X10CL
+	bool "W25X10CL"
+
+endchoice
+
+config RP2_FLASH_BOOT_FILE
+	string
+	default "boot2_w25q080.S" if RP2_FLASH_W25Q080
+	default "boot2_generic_03h.S" if RP2_FLASH_GENERIC_03H
+	default "boot2_is25lp080.S" if RP2_FLASH_IS25LP080
+	default "boot2_w25x10cl.S" if RP2_FLASH_W25X10CL
+
+config UART_RASPBERRYPI
+        default y
+        depends on SERIAL
+
+
+endif # SOC_SERIES_RP2XXX
diff --git a/soc/arm/raspberrypi/rp2/Kconfig.series b/soc/arm/raspberrypi/rp2/Kconfig.series
@@ -0,0 +1,18 @@
+# Raspberry Pi RP2XXX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_RP2XXX
+	bool "Raspberry Pi RP2 series MCU"
+	select ARM
+	select CPU_CORTEX_M0PLUS
+	select CPU_CORTEX_M_HAS_SYSTICK
+	select CPU_CORTEX_M_HAS_VTOR
+	select CPU_HAS_ARM_MPU
+	select SOC_FAMILY_RASPBERRY_PI
+	select HAS_RASPBERRYPI
+	select XIP
+	help
+		Enable support for Raspberry Pi RP20 MCU series
diff --git a/soc/arm/raspberrypi/rp2/Kconfig.soc b/soc/arm/raspberrypi/rp2/Kconfig.soc
@@ -0,0 +1,14 @@
+# Raspberry Pi RP2XXX MCU line
+
+# Copyright (c) 2021 Nordic Semiconductor ASA
+# Copyright (c) 2021 Yonatan Schachter
+# SPDX-License-Identifier: Apache-2.0
+
+choice
+	prompt "RP2xxx MCU Selection"
+	depends on SOC_SERIES_RP2XXX
+
+config SOC_RP2040
+	bool "Raspberry Pi RP2040"
+
+endchoice
diff --git a/soc/arm/raspberrypi/rp2/linker.ld b/soc/arm/raspberrypi/rp2/linker.ld
@@ -0,0 +1,22 @@
+/* linker.ld - Linker command/script file */
+
+/*
+ * Copyright (c) 2014 Wind River Systems, Inc.
+ * Copyright (c) 2021 Yonatan Schachter
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+MEMORY
+{
+	BOOT_FLASH (r) : ORIGIN = 0x10000000, LENGTH = 256
+}
+
+#include <arch/arm/aarch32/cortex_m/scripts/linker.ld>
+
+SECTIONS
+{
+	SECTION_PROLOGUE(BOOT_FLASH,, SUBALIGN(4))
+	{
+		KEEP(*(.boot2))
+	}
+}
diff --git a/soc/arm/raspberrypi/rp2/rp2_init.c b/soc/arm/raspberrypi/rp2/rp2_init.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2021 Yonatan Schachter
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "pico.h"
+
+#include "hardware/regs/m0plus.h"
+#include "hardware/regs/resets.h"
+#include "hardware/structs/mpu.h"
+#include "hardware/structs/scb.h"
+#include "hardware/structs/padsbank0.h"
+
+#include "hardware/clocks.h"
+#include "hardware/irq.h"
+#include "hardware/resets.h"
+
+void rp2_init(void)
+{
+	reset_block(~(RESETS_RESET_IO_QSPI_BITS |
+				RESETS_RESET_PADS_QSPI_BITS |
+				RESETS_RESET_PLL_USB_BITS |
+				RESETS_RESET_PLL_SYS_BITS));
+
+	unreset_block_wait(RESETS_RESET_BITS & ~(
+					RESETS_RESET_ADC_BITS |
+					RESETS_RESET_RTC_BITS |
+					RESETS_RESET_SPI0_BITS |
+					RESETS_RESET_SPI1_BITS |
+					RESETS_RESET_UART0_BITS |
+					RESETS_RESET_UART1_BITS |
+					RESETS_RESET_USBCTRL_BITS));
+
+	clocks_init();
+
+	unreset_block_wait(RESETS_RESET_BITS);
+}
diff --git a/soc/arm/raspberrypi/rp2/soc.c b/soc/arm/raspberrypi/rp2/soc.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2021 Nordic Semiconductor ASA
+ * Copyright (c) 2021 Yonatan Schachter
+ *
+ * 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
+
+#define LOG_LEVEL CONFIG_SOC_LOG_LEVEL
+LOG_MODULE_REGISTER(soc);
+
+void rp2_init(void);
+
+static int raspberry_pi_rp2040_init(const struct device *arg)
+{
+	uint32_t key;
+
+	rp2_init();
+
+	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;
+}
+
+SYS_INIT(raspberry_pi_rp2040_init, PRE_KERNEL_1, 0);
diff --git a/soc/arm/raspberrypi/rp2/soc.h b/soc/arm/raspberrypi/rp2/soc.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2016 Linaro Limited
+ * Copyright (c) 2021 Yonatan Schachter
+ *
+ * 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_
+
+#define __VTOR_PRESENT 1
+#define __MPU_PRESENT 1
+
+#endif /* _RASPBERRY_PI_RP2040_SOC_H_ */

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+# SPDX-License-Identifier: Apache-2.0`
	`2`	`+`
	`3`	`+add_subdirectory(${SOC_SERIES})`