STM32L: Added flash driver and target

Added the flash driver for the STM32L family, which highly differ from the STM32F family.
Added the TCL target file for JTAG access.

1 files changed, 81 insertions, 0 deletions

diff --git a/tcl/target/stm32l.cfg b/tcl/target/stm32l.cfg
new file mode 100644
index 00000000..5c3d3686
--- /dev/null
+++ b/tcl/target/stm32l.cfg
@@ -0,0 +1,81 @@
+# script for stm32l
+
+if { [info exists CHIPNAME] } {
+   set  _CHIPNAME $CHIPNAME
+} else {
+   set  _CHIPNAME stm32l
+}
+
+if { [info exists ENDIAN] } {
+   set  _ENDIAN $ENDIAN
+} else {
+   set  _ENDIAN little
+}
+
+# Work-area is a space in RAM used for flash programming
+# By default use 14kB
+if { [info exists WORKAREASIZE] } {
+   set  _WORKAREASIZE $WORKAREASIZE
+} else {
+   set  _WORKAREASIZE 0x3800
+}
+
+# JTAG speed should be <= F_CPU/6.
+# F_CPU after reset is 2MHz, so use F_JTAG max = 333kHz
+adapter_khz 100
+
+adapter_nsrst_delay 100
+jtag_ntrst_delay 100
+
+#jtag scan chain
+if { [info exists CPUTAPID ] } {
+   set _CPUTAPID $CPUTAPID
+} else {
+  # See STM Document RM0038
+  # Section 24.6.3
+   set _CPUTAPID 0x4ba00477
+}
+jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+if { [info exists BSTAPID ] } {
+   # FIXME this never gets used to override defaults...
+   set _BSTAPID $BSTAPID
+} else {
+  # See STM Document RM0038
+  # Section 24.6.2
+  set _BSTAPID 0x06416041
+}
+jtag newtap $_CHIPNAME bs -irlen 5 -expected-id $_BSTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position $_TARGETNAME
+
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+
+# flash size will be probed
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME stm32lx 0x08000000 0 0 0 $_TARGETNAME
+
+# if srst is not fitted use SYSRESETREQ to
+# perform a soft reset
+cortex_m3 reset_config sysresetreq
+
+proc stm32l_enable_HSI {} {
+	# Enable HSI as clock source
+	echo "STM32L: Enabling HSI"
+	
+	# Set HSION in RCC_CR
+	mww 0x40023800 0x00000101
+	
+	# Set HSI as SYSCLK
+	mww 0x40023808 0x00000001
+	
+	# Increase JTAG speed
+	adapter_khz 2000
+}
+
+$_TARGETNAME configure -event reset-init {
+	stm32l_enable_HSI
+}
+