# SPDX-License-Identifier: GPL-2.0-or-later

# This is an STM32 eval board with a single STM32F103ZET6 chip.
# http://www.st.com/internet/evalboard/product/204176.jsp

# increase working area to 32KB for faster flash programming
set WORKAREASIZE 0x8000

source [find target/stm32f1x.cfg]

#
# configure FSMC Bank 1 (NOR/PSRAM Bank 2) NOR flash
# M29W128GL70ZA6E
#

set _FLASHNAME $_CHIPNAME.norflash
flash bank $_FLASHNAME cfi 0x64000000 0x01000000 2 2 $_TARGETNAME

proc stm32_enable_fsmc {} {

	echo "Enabling FSMC Bank 1 (NOR/PSRAM Bank 2)"

	# enable gpio (defg) clocks for fsmc
	# RCC_APB2ENR
	mww 0x40021018 0x000001E0

	# enable fsmc clock
	# RCC_AHBENR
	mww 0x40021014 0x00000114

	# configure gpio to alternate function
	# GPIOD_CRL
	mww 0x40011400 0x44BB44BB
	# GPIOD_CRH
	mww 0x40011404 0xBBBBBBBB

	# GPIOE_CRL
	mww 0x40011800 0xBBBBB444
	# GPIOE_CRH
	mww 0x40011804 0xBBBBBBBB

	# GPIOF_CRL
	mww 0x40011C00 0x44BBBBBB
	# GPIOF_CRH
	mww 0x40011C04 0xBBBB4444

	# GPIOG_CRL
	mww 0x40012000 0x44BBBBBB
	# GPIOG_CRH
	mww 0x40012004 0x444444B4

	# setup fsmc timings
	# FSMC_BCR1
	mww 0xA0000008 0x00001058

	# FSMC_BTR1
	mww 0xA000000C 0x10000502

	# FSMC_BCR1 - enable fsmc
	mww 0xA0000008 0x00001059
}

$_TARGETNAME configure -event reset-init {
	stm32_enable_fsmc
}
