From ba48db8275730fbc512c0872ae426970a09b5619 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Thu, 22 Sep 2022 14:03:07 +0200
Subject: add support for STM32F746G-DISCO device

Tested with toolbox / simpleinit as userland.
FDPIC/FLAT support both successfully tested.

No LCD or Ethernet support.
---
 target/arm/Makefile                    |  7 +++++--
 target/arm/kernel/st-stm32f746g        | 31 +++++++++++++++++++++++++++++++
 target/arm/st-stm32f746g/extlinux.conf |  4 ++++
 target/arm/st-stm32f746g/genimage.cfg  | 27 +++++++++++++++++++++++++++
 target/arm/systems/st-stm32f746g       | 17 +++++++++++++++++
 5 files changed, 84 insertions(+), 2 deletions(-)
 create mode 100644 target/arm/kernel/st-stm32f746g
 create mode 100644 target/arm/st-stm32f746g/extlinux.conf
 create mode 100644 target/arm/st-stm32f746g/genimage.cfg
 create mode 100644 target/arm/systems/st-stm32f746g

(limited to 'target/arm')

diff --git a/target/arm/Makefile b/target/arm/Makefile
index d92e10d6a..4f7ffc009 100644
--- a/target/arm/Makefile
+++ b/target/arm/Makefile
@@ -148,9 +148,9 @@ endif
 endif
 ifeq ($(ADK_TARGET_FS),genimage)
 targethelp:
-	@echo "The disk image is: $(FW_DIR)/disk.img"
+	@echo "The disk image is: $(FW_DIR)/sdcard.img"
 	@echo "Use following command to install it on SD card:"
-	@echo 'sudo dd if=$(FW_DIR)/disk.img of=/dev/sdX bs=2048k'
+	@echo 'sudo dd if=$(FW_DIR)/sdcard.img of=/dev/sdX bs=2048k'
 endif
 
 kernel-strip:
@@ -219,6 +219,9 @@ ifeq ($(ADK_TARGET_SYSTEM_ST_STM32F429),y)
 endif
 ifeq ($(ADK_TARGET_SYSTEM_ST_STM32F769),y)
 	${KERNEL_MAKE} dtbs $(MAKE_TRACE)
+endif
+ifeq ($(ADK_TARGET_SYSTEM_ST_STM32F746G),y)
+	${KERNEL_MAKE} dtbs $(MAKE_TRACE)
 endif
 	for x in $(LINUX_DIR)/arch/arm/boot/dts/*.dtb; do \
 		[[ -e "$$x" ]] && cp $(LINUX_DIR)/arch/arm/boot/dts/*.dtb $(FW_DIR); \
diff --git a/target/arm/kernel/st-stm32f746g b/target/arm/kernel/st-stm32f746g
new file mode 100644
index 000000000..0459ccf8b
--- /dev/null
+++ b/target/arm/kernel/st-stm32f746g
@@ -0,0 +1,31 @@
+CONFIG_ARM_SINGLE_ARMV7M=y
+CONFIG_ARCH_STM32=y
+CONFIG_MACH_STM32F746=y
+CONFIG_SET_MEM_PARAM=y
+CONFIG_DRAM_BASE=0xC0000000
+CONFIG_DRAM_SIZE=0x01000000
+CONFIG_FLASH_MEM_BASE=0x08000000
+CONFIG_FLASH_SIZE=0x00200000
+CONFIG_SERIAL_NONSTANDARD=y
+CONFIG_SERIAL_STM32=y
+CONFIG_SERIAL_STM32_CONSOLE=y
+CONFIG_I2C=y
+CONFIG_I2C_CHARDEV=y
+CONFIG_I2C_STM32F4=y
+CONFIG_I2C_STM32F7=y
+CONFIG_GPIO_STMPE=y
+CONFIG_MFD_STMPE=y
+CONFIG_REGULATOR=y
+CONFIG_REGULATOR_FIXED_VOLTAGE=y
+CONFIG_MMC=y
+CONFIG_MMC_BLOCK=y
+CONFIG_MMC_ARMMMCI=y
+CONFIG_MMC_STM32_SDMMC=y
+CONFIG_DMADEVICES=y
+CONFIG_STM32_DMA=y
+CONFIG_STM32_DMAMUX=y
+CONFIG_STM32_MDMA=y
+#CONFIG_NET_VENDOR_STMICRO=y
+#CONFIG_STMMAC_ETH=y
+#CONFIG_STMMAC_PLATFORM=y
+#CONFIG_DWMAC_STM32=y
diff --git a/target/arm/st-stm32f746g/extlinux.conf b/target/arm/st-stm32f746g/extlinux.conf
new file mode 100644
index 000000000..9a6728417
--- /dev/null
+++ b/target/arm/st-stm32f746g/extlinux.conf
@@ -0,0 +1,4 @@
+label stm32f746g-disco-openadk
+  kernel /kernel
+  devicetree /stm32f746-disco.dtb
+  append console=ttySTM0,115200 root=/dev/mmcblk0p2 rw rootwait consoleblank=0
diff --git a/target/arm/st-stm32f746g/genimage.cfg b/target/arm/st-stm32f746g/genimage.cfg
new file mode 100644
index 000000000..79e9e89f0
--- /dev/null
+++ b/target/arm/st-stm32f746g/genimage.cfg
@@ -0,0 +1,27 @@
+image boot.vfat {
+	vfat {
+		files = {
+			"kernel",
+			"stm32f746-disco.dtb",
+			"extlinux"
+		}
+	}
+
+	size = 16M
+}
+
+image sdcard.img {
+	hdimage {
+	}
+
+	partition boot {
+		partition-type = 0xC
+		image = "boot.vfat"
+	}
+
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext"
+		size = 32M
+	}
+}
diff --git a/target/arm/systems/st-stm32f746g b/target/arm/systems/st-stm32f746g
new file mode 100644
index 000000000..8bb4be52f
--- /dev/null
+++ b/target/arm/systems/st-stm32f746g
@@ -0,0 +1,17 @@
+config ADK_TARGET_SYSTEM_ST_STM32F746G
+	bool "STMicroelectronics STM32F746G Disco"
+	depends on ADK_TARGET_OS_LINUX
+	select ADK_TARGET_LITTLE_ENDIAN
+	select ADK_TARGET_CPU_ARM_CORTEX_M7
+	select ADK_TARGET_ARCH_ARM_WITH_THUMB
+	select ADK_TARGET_WITH_SERIAL
+	select ADK_TARGET_WITH_VGA
+	select ADK_TARGET_WITH_NET
+	select ADK_TARGET_WITH_NETDEVICE
+	select ADK_TARGET_UCLINUX
+	select ADK_TARGET_KERNEL_WITH_COMPRESSION
+	select ADK_TARGET_KERNEL_ZIMAGE	
+	select ADK_HOST_BUILD_OPENOCD
+	help
+	  STMicroelectronics STM32F746G Disco
+
-- 
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