Add BSP for nucleo-g491re

This adds bsp for ST nucleo-g491re board.
This is mostly copy of nucleo-f474 only differences being:
- PLL configured to 170MHz (not affecting USB which runs on HSI48)
- Linker script freshly generated from STM32CubeIDE (smaller RAM)

Signed-off-by: Jerzy Kasenberg <[email protected]>

4 files changed, 311 insertions, 0 deletions

diff --git a/hw/bsp/stm32g4/boards/stm32g491nucleo/STM32G491RETX_FLASH.ld b/hw/bsp/stm32g4/boards/stm32g491nucleo/STM32G491RETX_FLASH.ld
new file mode 100644
index 000000000..f5553a112
--- /dev/null
+++ b/hw/bsp/stm32g4/boards/stm32g491nucleo/STM32G491RETX_FLASH.ld
@@ -0,0 +1,185 @@
+/*
+******************************************************************************
+**
+** @file        : LinkerScript.ld
+**
+** @author      : Auto-generated by STM32CubeIDE
+**
+**  Abstract    : Linker script for NUCLEO-G491RE Board embedding STM32G491RETx Device from stm32g4 series
+**                      512KBytes FLASH
+**                      112KBytes RAM
+**
+**                Set heap size, stack size and stack location according
+**                to application requirements.
+**
+**                Set memory bank area and size if external memory is used
+**
+**  Target      : STMicroelectronics STM32
+**
+**  Distribution: The file is distributed as is, without any warranty
+**                of any kind.
+**
+******************************************************************************
+** @attention
+**
+** Copyright (c) 2023 STMicroelectronics.
+** All rights reserved.
+**
+** This software is licensed under terms that can be found in the LICENSE file
+** in the root directory of this software component.
+** If no LICENSE file comes with this software, it is provided AS-IS.
+**
+******************************************************************************
+*/
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_estack = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
+MEMORY
+{
+  RAM    (xrw)    : ORIGIN = 0x20000000,   LENGTH = 112K
+  FLASH    (rx)    : ORIGIN = 0x8000000,   LENGTH = 512K
+}
+
+/* Sections */
+SECTIONS
+{
+  /* The startup code into "FLASH" Rom type memory */
+  .isr_vector :
+  {
+    . = ALIGN(4);
+    KEEP(*(.isr_vector)) /* Startup code */
+    . = ALIGN(4);
+  } >FLASH
+
+  /* The program code and other data into "FLASH" Rom type memory */
+  .text :
+  {
+    . = ALIGN(4);
+    *(.text)           /* .text sections (code) */
+    *(.text*)          /* .text* sections (code) */
+    *(.glue_7)         /* glue arm to thumb code */
+    *(.glue_7t)        /* glue thumb to arm code */
+    *(.eh_frame)
+
+    KEEP (*(.init))
+    KEEP (*(.fini))
+
+    . = ALIGN(4);
+    _etext = .;        /* define a global symbols at end of code */
+  } >FLASH
+
+  /* Constant data into "FLASH" Rom type memory */
+  .rodata :
+  {
+    . = ALIGN(4);
+    *(.rodata)         /* .rodata sections (constants, strings, etc.) */
+    *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM.extab   : {
+    . = ALIGN(4);
+    *(.ARM.extab* .gnu.linkonce.armextab.*)
+    . = ALIGN(4);
+  } >FLASH
+
+  .ARM : {
+    . = ALIGN(4);
+    __exidx_start = .;
+    *(.ARM.exidx*)
+    __exidx_end = .;
+    . = ALIGN(4);
+  } >FLASH
+
+  .preinit_array     :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__preinit_array_start = .);
+    KEEP (*(.preinit_array*))
+    PROVIDE_HIDDEN (__preinit_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .init_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__init_array_start = .);
+    KEEP (*(SORT(.init_array.*)))
+    KEEP (*(.init_array*))
+    PROVIDE_HIDDEN (__init_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  .fini_array :
+  {
+    . = ALIGN(4);
+    PROVIDE_HIDDEN (__fini_array_start = .);
+    KEEP (*(SORT(.fini_array.*)))
+    KEEP (*(.fini_array*))
+    PROVIDE_HIDDEN (__fini_array_end = .);
+    . = ALIGN(4);
+  } >FLASH
+
+  /* Used by the startup to initialize data */
+  _sidata = LOADADDR(.data);
+
+  /* Initialized data sections into "RAM" Ram type memory */
+  .data :
+  {
+    . = ALIGN(4);
+    _sdata = .;        /* create a global symbol at data start */
+    *(.data)           /* .data sections */
+    *(.data*)          /* .data* sections */
+    *(.RamFunc)        /* .RamFunc sections */
+    *(.RamFunc*)       /* .RamFunc* sections */
+
+    . = ALIGN(4);
+    _edata = .;        /* define a global symbol at data end */
+
+  } >RAM AT> FLASH
+
+  /* Uninitialized data section into "RAM" Ram type memory */
+  . = ALIGN(4);
+  .bss :
+  {
+    /* This is used by the startup in order to initialize the .bss section */
+    _sbss = .;         /* define a global symbol at bss start */
+    __bss_start__ = _sbss;
+    *(.bss)
+    *(.bss*)
+    *(COMMON)
+
+    . = ALIGN(4);
+    _ebss = .;         /* define a global symbol at bss end */
+    __bss_end__ = _ebss;
+  } >RAM
+
+  /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
+  ._user_heap_stack :
+  {
+    . = ALIGN(8);
+    PROVIDE ( end = . );
+    PROVIDE ( _end = . );
+    . = . + _Min_Heap_Size;
+    . = . + _Min_Stack_Size;
+    . = ALIGN(8);
+  } >RAM
+
+  /* Remove information from the compiler libraries */
+  /DISCARD/ :
+  {
+    libc.a ( * )
+    libm.a ( * )
+    libgcc.a ( * )
+  }
+
+  .ARM.attributes 0 : { *(.ARM.attributes) }
+}
diff --git a/hw/bsp/stm32g4/boards/stm32g491nucleo/board.cmake b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.cmake
new file mode 100644
index 000000000..e37544499
--- /dev/null
+++ b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.cmake
@@ -0,0 +1,11 @@
+set(MCU_VARIANT stm32g491xx)
+set(JLINK_DEVICE stm32g491re)
+
+set(LD_FILE_GNU ${CMAKE_CURRENT_LIST_DIR}/STM32G491RETX_FLASH.ld)
+
+function(update_board TARGET)
+  target_compile_definitions(${TARGET} PUBLIC
+    STM32G491xx
+    HSE_VALUE=24000000
+    )
+endfunction()
diff --git a/hw/bsp/stm32g4/boards/stm32g491nucleo/board.h b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.h
new file mode 100644
index 000000000..7dd4ed9ae
--- /dev/null
+++ b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.h
@@ -0,0 +1,104 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2020, Ha Thach (tinyusb.org)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * This file is part of the TinyUSB stack.
+ */
+
+#ifndef BOARD_H_
+#define BOARD_H_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+// G474RE Nucleo does not has usb connection. We need to manually connect
+// - PA12 for D+, CN10.12
+// - PA11 for D-, CN10.14
+
+// LED
+#define LED_PORT              GPIOA
+#define LED_PIN               GPIO_PIN_5
+#define LED_STATE_ON          0
+
+// Button
+#define BUTTON_PORT           GPIOC
+#define BUTTON_PIN            GPIO_PIN_13
+#define BUTTON_STATE_ACTIVE   1
+
+// UART Enable for STLink VCOM
+#define UART_DEV              LPUART1
+#define UART_CLK_EN           __HAL_RCC_LPUART1_CLK_ENABLE
+#define UART_GPIO_PORT        GPIOA
+#define UART_GPIO_AF          GPIO_AF12_LPUART1
+#define UART_TX_PIN           GPIO_PIN_2
+#define UART_RX_PIN           GPIO_PIN_3
+
+
+//--------------------------------------------------------------------+
+// RCC Clock
+//--------------------------------------------------------------------+
+static inline void board_clock_init(void)
+{
+  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
+  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
+
+  // Configure the main internal regulator output voltage
+  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
+
+  // Initializes the CPU, AHB and APB buses clocks
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48 | RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState       = RCC_HSE_ON;
+  RCC_OscInitStruct.HSI48State     = RCC_HSI48_ON;
+  RCC_OscInitStruct.PLL.PLLState   = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource  = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLM       = RCC_PLLM_DIV6;
+  RCC_OscInitStruct.PLL.PLLN       = 85;
+  RCC_OscInitStruct.PLL.PLLP       = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ       = RCC_PLLQ_DIV2;
+  RCC_OscInitStruct.PLL.PLLR       = RCC_PLLR_DIV2;
+  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+  // Initializes the CPU, AHB and APB buses clocks
+  RCC_ClkInitStruct.ClockType      = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource   = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider  = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4);
+
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
+  PeriphClkInit.UsbClockSelection    = RCC_USBCLKSOURCE_HSI48;
+  HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) ;
+}
+
+static inline void board_vbus_sense_init(void)
+{
+  // Enable VBUS sense (B device) via pin PA9
+}
+
+#ifdef __cplusplus
+ }
+#endif
+
+#endif /* BOARD_H_ */
diff --git a/hw/bsp/stm32g4/boards/stm32g491nucleo/board.mk b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.mk
new file mode 100644
index 000000000..c0f876331
--- /dev/null
+++ b/hw/bsp/stm32g4/boards/stm32g491nucleo/board.mk
@@ -0,0 +1,11 @@
+MCU_VARIANT = stm32g491xx
+
+CFLAGS += \
+	-DSTM32G491xx \
+	-DHSE_VALUE=24000000
+
+# Linker
+LD_FILE_GCC = $(BOARD_PATH)/STM32G491RETX_FLASH.ld
+
+# For flash-jlink target
+JLINK_DEVICE = stm32g491re