flash: Added support for Freescale Kinetis KE family.

Tested with MKE04Z8VTG4, MKE02Z64VLC4 and MKE02Z64VLD2.

Change-Id: I606e32a2746a3b96d3e50f3656ba78d40c41c1ea
Signed-off-by: Ivan Meleca <ivan@artekit.eu>
Reviewed-on: http://openocd.zylin.com/3380
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

tcl/target/kex.cfg

@@ -0,0 +1,58 @@
+#
+# Freescale Kinetis KE series devices
+#
+
+source [find target/swj-dp.tcl]
+
+if { [info exists CHIPNAME] } {
+    set _CHIPNAME $CHIPNAME
+} else {
+    set _CHIPNAME ke
+}
+
+# Work-area is a space in RAM used for flash programming
+# By default use 1kB
+if { [info exists WORKAREASIZE] } {
+   set _WORKAREASIZE $WORKAREASIZE
+} else {
+   set _WORKAREASIZE 0x400
+}
+
+if { [info exists CPUTAPID] } {
+    set _CPUTAPID $CPUTAPID
+} else {
+   if { [using_jtag] } {
+      set _CPUTAPID 0x4ba00477
+   } {
+      set _CPUTAPID 0x2ba01477
+   }
+}
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -chain-position $_CHIPNAME.cpu
+
+$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+set _FLASHNAME $_CHIPNAME.flash
+flash bank $_FLASHNAME kinetis_ke 0 0 0 0 $_TARGETNAME
+
+adapter_khz 1000
+
+reset_config srst_nogate
+
+if {![using_hla]} {
+
+   # It is important that "kinetis_ke mdm check_security" is called for
+   # 'examine-end' event and not 'eximine-start'. Calling it in 'examine-start'
+   # causes "kinetis_ke mdm check_security" to fail the first time openocd
+   # calls it when it tries to connect after the CPU has been power-cycled.
+   $_CHIPNAME.cpu configure -event examine-end {
+      kinetis_ke mdm check_security
+   }
+
+   # if srst is not fitted use SYSRESETREQ to
+   # perform a soft reset
+   cortex_m reset_config sysresetreq
+}