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- #
- # 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
- }
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