116 lines
3.0 KiB
INI
116 lines
3.0 KiB
INI
#
|
|
# Copyright (C) 2011 by Karl Kurbjun
|
|
# Copyright (C) 2009 by David Brownell
|
|
#
|
|
|
|
# Utilities for TI ICEpick-C ... used in DaVinci, OMAP3, and more.
|
|
# Details about the ICEPickC are available in the AM/DM37x document SPRUGN4M
|
|
|
|
# create "constants"
|
|
proc CONST { key } {
|
|
|
|
array set constant {
|
|
# define ICEPick instructions
|
|
IR_BYPASS 0x00
|
|
IR_ROUTER 0x02
|
|
IR_CONNECT 0x07
|
|
IF_BYPASS 0x3F
|
|
}
|
|
return $constant($key)
|
|
}
|
|
|
|
# Instruction to connect to the icepick module
|
|
proc icepick_c_connect {jrc} {
|
|
|
|
# Send CONNECT instruction in IR state
|
|
irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
|
|
|
|
# Send write and connect key
|
|
drscan $jrc 8 0x89 -endstate DRPAUSE
|
|
}
|
|
|
|
# Instruction to disconnect to the icepick module
|
|
proc icepick_c_disconnect {jrc} {
|
|
|
|
# Send CONNECT instruction in IR state
|
|
irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
|
|
|
|
# Send write and connect key
|
|
drscan $jrc 8 0x86 -endstate DRPAUSE
|
|
}
|
|
|
|
#
|
|
# icepick_c_router:
|
|
# this function is for sending router commands
|
|
# arguments are:
|
|
# jrc: TAP name for the ICEpick
|
|
# rw: read/write (0 for read, 1 for write)
|
|
# block: icepick or DAP
|
|
# register: which register to read/write
|
|
# payload: value to read/write
|
|
# this function is for sending router commands
|
|
#
|
|
proc icepick_c_router {jrc rw block register payload} {
|
|
|
|
set new_dr_value \
|
|
[expr ( ($rw & 0x1) << 31) | ( ($block & 0x7) << 28) | \
|
|
( ($register & 0xF) << 24) | ( $payload & 0xFFFFFF ) ]
|
|
|
|
# echo "\tNew router value:\t0x[format %x $new_dr_value]"
|
|
|
|
# select router
|
|
irscan $jrc [CONST IR_ROUTER] -endstate IRPAUSE
|
|
|
|
# ROUTER instructions are 32 bits wide
|
|
set old_dr_value [drscan $jrc 32 $new_dr_value -endstate DRPAUSE]
|
|
}
|
|
|
|
# Configure the icepick control register
|
|
proc icepick_c_setup {jrc} {
|
|
|
|
# send a router write, block is 0, register is 1, value is 0x2100
|
|
icepick_c_router $jrc 1 0x0 0x1 0x001000
|
|
}
|
|
|
|
# jrc == TAP name for the ICEpick
|
|
# port == a port number, 0..15
|
|
proc icepick_c_tapenable {jrc port} {
|
|
|
|
# First CONNECT to the ICEPick
|
|
# echo "Connecting to ICEPick"
|
|
icepick_c_connect $jrc
|
|
|
|
# echo "Configuring the ICEpick"
|
|
icepick_c_setup $jrc
|
|
|
|
# NOTE: it's important not to enter RUN/IDLE state until
|
|
# done sending these instructions and data to the ICEpick.
|
|
# And never to enter RESET, which will disable the TAPs.
|
|
|
|
# first enable power and clock for TAP
|
|
icepick_c_router $jrc 1 0x2 $port 0x100048
|
|
|
|
# TRM states that the register should be read back here, skipped for now
|
|
|
|
# enable debug "default" mode
|
|
icepick_c_router $jrc 1 0x2 $port 0x102048
|
|
|
|
# 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 0x102148
|
|
|
|
# Enter the bypass state
|
|
irscan $jrc [CONST IR_BYPASS] -endstate RUN/IDLE
|
|
runtest 10
|
|
}
|
|
|
|
# This function uses the ICEPick to send a warm system reset
|
|
proc icepick_c_wreset {jrc} {
|
|
|
|
# send a router write, block is 0, register is 1, value is 0x2100
|
|
icepick_c_router $jrc 1 0x0 0x1 0x002101
|
|
}
|
|
|