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

# script for stm32wbax family

#
# stm32wba devices support both JTAG and SWD transports.
#
source [find target/swj-dp.tcl]
source [find mem_helper.tcl]

if { [info exists CHIPNAME] } {
    set _CHIPNAME $CHIPNAME
} else {
    set _CHIPNAME stm32wbax
}

# Work-area is a space in RAM used for flash programming
# By default use 64kB
if { [info exists WORKAREASIZE] } {
    set _WORKAREASIZE $WORKAREASIZE
} else {
    set _WORKAREASIZE 0x10000
}

#jtag scan chain
if { [info exists CPUTAPID] } {
    set _CPUTAPID $CPUTAPID
} else {
    if { [using_jtag] } {
        set _CPUTAPID 0x6ba00477
    } else {
        # SWD IDCODE (single drop, arm)
        set _CPUTAPID 0x6ba02477
    }
}

swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu

if {[using_jtag]} {
    jtag newtap $_CHIPNAME bs -irlen 5
}

set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m -endian little -dap $_CHIPNAME.dap -ap-num 1

$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0

flash bank $_CHIPNAME.flash stm32l4x 0x08000000 0 0 0 $_TARGETNAME
flash bank $_CHIPNAME.otp   stm32l4x 0x0FF90000 0 0 0 $_TARGETNAME

# Common knowledges tells JTAG speed should be <= F_CPU/6.
# F_CPU after reset is MSI 4MHz, so use F_JTAG = 500 kHz to stay on
# the safe side.
#
# Note that there is a pretty wide band where things are
# more or less stable, see http://openocd.zylin.com/#/c/3366/
adapter speed 500

adapter srst delay 100
if {[using_jtag]} {
    jtag_ntrst_delay 100
}

reset_config srst_nogate

if {![using_hla]} {
    # if srst is not fitted use SYSRESETREQ to
    # perform a soft reset
    cortex_m reset_config sysresetreq
}

$_TARGETNAME configure -event reset-init {
    # CPU comes out of reset with HSION | HSIRDY.
    # Use HSI 16 MHz clock, compliant even with VOS == 2.
    # 1 WS compliant with VOS == 2 and 16 MHz.
    mmw 0x40022000 0x00000001 0x0000000E	;# FLASH_ACR: Latency = 1
    mmw 0x56020C00 0x00000100 0x00000000	;# RCC_CR |= HSION
    mmw 0x56020C1C 0x00000000 0x00000002	;# RCC_CFGR1: SW=HSI16
    # Boost JTAG frequency
    adapter speed 4000
}

$_TARGETNAME configure -event reset-start {
    # Reset clock is HSI (16 MHz)
    adapter speed 2000
}

$_TARGETNAME configure -event examine-end {
    # Enable debug during low power modes (uses more power)
    # DBGMCU_CR |= DBG_STANDBY | DBG_STOP
    mmw 0xE0042004 0x00000006 0

    # Stop watchdog counters during halt
    # DBGMCU_APB1LFZR |= DBG_IWDG_STOP | DBG_WWDG_STOP
    mmw 0xE0042008 0x00001800 0
}

tpiu create $_CHIPNAME.tpiu -dap $_CHIPNAME.dap -ap-num 0 -baseaddr 0xE0040000

lappend _telnet_autocomplete_skip _proc_pre_enable_$_CHIPNAME.tpiu
proc _proc_pre_enable_$_CHIPNAME.tpiu {_targetname} {
    targets $_targetname
}

$_CHIPNAME.tpiu configure -event pre-enable "_proc_pre_enable_$_CHIPNAME.tpiu $_TARGETNAME"