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target/icepick.cfg: Add support for Test TAPs in ICEPick C 

In addition to the debug TAPs, the ICEPick C also supports
a bank of Test TAPs (limited functionality intended for
non-debuggable targets). Added support for Test TAPs to
the icepick_c_tapenable routine. Port numbers of 0 to 15
will continue to be handled as a debug TAP number. Test
TAPs will be port numbers of 16 to 31.

This functionality will be needed for doing a flash
mass erase on CC26xx/CC13xx targets. It is possible
for user application to block even adding the Cortex M
TAP to the scan chain, so the only way to unbrick the
target and erase the flash is using a component on a
test TAP of the device's ICEPick router.

Change-Id: I0aa52a08d43a00cbd396efdeadd504fc31c98510
Signed-off-by: Edward Fewell <efewell@ti.com>
Reviewed-on: http://openocd.zylin.com/5715
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
This commit is contained in:
Edward Fewell 2020-06-03 14:55:07 -05:00 committed by Antonio Borneo
parent b7d41ef96a
commit 11116ef6ad
1 changed files with 18 additions and 4 deletions
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22
tcl/target/icepick.cfg
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@ -75,9 +75,22 @@ proc icepick_c_setup {jrc} {
}
# jrc == TAP name for the ICEpick
# port == a port number, 0..15
# port == a port number, 0..15 for debug tap, 16..31 for test tap
proc icepick_c_tapenable {jrc port} {
if { ($port >= 0) && ($port < 16) } {
# Debug tap"
set tap $port
set block 0x2
} elseif { $port < 32 } {
# Test tap
set tap [expr ($port - 16)]
set block 0x1
} else {
echo "ERROR: Invalid ICEPick C port number: $port"
return
}
# First CONNECT to the ICEPick
# echo "Connecting to ICEPick"
icepick_c_connect $jrc
@ -90,18 +103,18 @@ proc icepick_c_tapenable {jrc port} {
# And never to enter RESET, which will disable the TAPs.
# first enable power and clock for TAP
icepick_c_router $jrc 1 0x2 $port 0x110048
icepick_c_router $jrc 1 $block $tap 0x110048
# TRM states that the register should be read back here, skipped for now
# enable debug "default" mode
icepick_c_router $jrc 1 0x2 $port 0x112048
icepick_c_router $jrc 1 $block $tap 0x112048
# TRM states that debug enable and debug mode should be read back and
# confirmed - skipped for now
# Finally select the tap
icepick_c_router $jrc 1 0x2 $port 0x112148
icepick_c_router $jrc 1 $block $tap 0x112148
# Enter the bypass state
irscan $jrc [CONST IR_BYPASS] -endstate RUN/IDLE
@ -119,6 +132,7 @@ proc icepick_d_set_core_control {jrc coreid value } {
# Follow the sequence described in
# http://processors.wiki.ti.com/images/f/f6/Router_Scan_Sequence-ICEpick-D.pdf
proc icepick_d_tapenable {jrc port coreid { value 0x2008 } } {
# First CONNECT to the ICEPick
icepick_c_connect $jrc
icepick_c_setup $jrc