cmsis-dap: add initial cmsis-dap support

This is based on work from:
https://github.com/TheShed/OpenOCD-CMSIS-DAP/tree/cmsis-dap

Main changes include moving over to using HIDAPI rather than libusb-1.0
and cleaning up to merge into master. Support for reset using srst has
also been added.

It has been tested on all the mbed boards as well as the Freedom board
from Freescale. These boards only implement SWD mode, however JTAG mode
has been tested with a Keil ULINK2 and a stm32 target - but requires a lot
more work.

Change-Id: I96d5ee1993bc9c0526219ab754c5aad3b55d812d
Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk>
Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
Reviewed-on: http://openocd.zylin.com/1542
Tested-by: jenkins

tcl/target/kl25.cfg

@@ -0,0 +1,48 @@
+#
+# Freescale Kinetis KL25 devices
+#
+
+#
+# KL25 devices support both JTAG and SWD transports.
+#
+source [find target/swj-dp.tcl]
+
+if { [info exists CHIPNAME] } {
+    set _CHIPNAME $CHIPNAME
+} else {
+    set _CHIPNAME kl25
+}
+
+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 4kB
+if { [info exists WORKAREASIZE] } {
+   set _WORKAREASIZE $WORKAREASIZE
+} else {
+   set _WORKAREASIZE 0x1000
+}
+
+if { [info exists CPUTAPID] } {
+    set _CPUTAPID $CPUTAPID
+} else {
+    set _CPUTAPID 0x0bc11477
+}
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -endian $_ENDIAN -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 0 0 0 0 $_TARGETNAME
+
+# if srst is not fitted use SYSRESETREQ to
+# perform a soft reset
+cortex_m reset_config sysresetreq

tcl/target/lpc11uxx.cfg

@@ -0,0 +1,48 @@
+#
+# NXP lpc11uxx family
+
+source [find target/swj-dp.tcl]
+
+if { [info exists CHIPNAME] } {
+	set _CHIPNAME $CHIPNAME
+} else {
+	set _CHIPNAME lpc11uxx
+}
+
+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 6kB
+if { [info exists WORKAREASIZE] } {
+   set _WORKAREASIZE $WORKAREASIZE
+} else {
+   set _WORKAREASIZE 0x1800
+}
+
+if { [info exists CPUTAPID] } {
+	set _CPUTAPID $CPUTAPID
+} else {
+	set _CPUTAPID 0x00000000
+}
+
+# delays on reset lines
+adapter_nsrst_delay 100
+#jtag_ntrst_delay 100
+
+swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
+
+set _TARGETNAME $_CHIPNAME.cpu
+target create $_TARGETNAME cortex_m -endian $_ENDIAN -chain-position $_TARGETNAME
+
+$_TARGETNAME configure -work-area-phys 0x10000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
+
+#set _FLASHNAME $_CHIPNAME.flash
+#flash bank $_FLASHNAME lpc2000 0 0 0 0 $_TARGETNAME
+
+# if srst is not fitted use SYSRESETREQ to
+# perform a soft reset
+cortex_m reset_config sysresetreq

tcl/target/lpc17xx.cfg

@@ -49,10 +49,6 @@ if { [info exists CPUROMSIZE] } {
 	error "_CPUROMSIZE not set. Please do not include lpc17xx.cfg directly, but the specific chip configuration file (lpc1751.cfg, lpc1764.cfg, etc)."
 }
 
-#delays on reset lines
-adapter_nsrst_delay 200
-jtag_ntrst_delay 200
-
 #jtag newtap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
 swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
 
@@ -74,6 +70,12 @@ flash bank $_FLASHNAME lpc2000 0x0 $_CPUROMSIZE 0 0 $_TARGETNAME \
 # we have no idea what clock the target is running at.
 adapter_khz 10
 
+# delays on reset lines
+adapter_nsrst_delay 200
+if {$using_jtag} {
+ jtag_ntrst_delay 200
+}
+
 $_TARGETNAME configure -event reset-init {
 	# Do not remap 0x0000-0x0020 to anything but the flash (i.e. select
 	# "User Flash Mode" where interrupt vectors are _not_ remapped,

tcl/target/swj-dp.tcl

@@ -18,8 +18,13 @@
 # split out "chip" and "tag" so we can someday handle
 # them more uniformly irlen too...)
 
+global using_jtag
+set using_jtag 1
+
 proc swj_newdap {chip tag args} {
-set tran [transport select]
-if [string equal $tran "jtag"] { eval jtag newtap $chip $tag $args}
-if [string equal $tran "swd"] { eval swd newdap $chip $tag $args }
+ global using_jtag
+ set tran [transport select]
+ if [string equal $tran "jtag"] { eval jtag newtap $chip $tag $args; set using_jtag 1 }
+ if [string equal $tran "swd"] { eval swd newdap $chip $tag $args; set using_jtag 0 }
+ if [string equal $tran "cmsis-dap"] { eval cmsis-dap newdap $chip $tag $args; set using_jtag 0 }
 }