143 lines
3.7 KiB
INI
143 lines
3.7 KiB
INI
#
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# Copyright (C) 2011 by Karl Kurbjun
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# Copyright (C) 2009 by David Brownell
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#
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# Utilities for TI ICEpick-C/D used in most TI SoCs
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# Details about the ICEPick are available in the the TRM for each SoC
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# and http://processors.wiki.ti.com/index.php/ICEPICK
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# create "constants"
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proc CONST { key } {
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array set constant {
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# define ICEPick instructions
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IR_BYPASS 0x00
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IR_ROUTER 0x02
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IR_CONNECT 0x07
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IF_BYPASS 0x3F
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}
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return $constant($key)
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}
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# Instruction to connect to the icepick module
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proc icepick_c_connect {jrc} {
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# Send CONNECT instruction in IR state
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irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
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# Send write and connect key
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drscan $jrc 8 0x89 -endstate DRPAUSE
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}
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# Instruction to disconnect to the icepick module
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proc icepick_c_disconnect {jrc} {
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# Send CONNECT instruction in IR state
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irscan $jrc [CONST IR_CONNECT] -endstate IRPAUSE
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# Send write and connect key
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drscan $jrc 8 0x86 -endstate DRPAUSE
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}
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#
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# icepick_c_router:
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# this function is for sending router commands
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# arguments are:
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# jrc: TAP name for the ICEpick
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# rw: read/write (0 for read, 1 for write)
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# block: icepick or DAP
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# register: which register to read/write
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# payload: value to read/write
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# this function is for sending router commands
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#
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proc icepick_c_router {jrc rw block register payload} {
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set new_dr_value \
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[expr ( ($rw & 0x1) << 31) | ( ($block & 0x7) << 28) | \
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( ($register & 0xF) << 24) | ( $payload & 0xFFFFFF ) ]
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# echo "\tNew router value:\t0x[format %x $new_dr_value]"
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# select router
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irscan $jrc [CONST IR_ROUTER] -endstate IRPAUSE
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# ROUTER instructions are 32 bits wide
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set old_dr_value [drscan $jrc 32 $new_dr_value -endstate DRPAUSE]
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}
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# Configure the icepick control register
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proc icepick_c_setup {jrc} {
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# send a router write, block is 0, register is 1, value is 0x2100
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icepick_c_router $jrc 1 0x0 0x1 0x001000
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}
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# jrc == TAP name for the ICEpick
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# port == a port number, 0..15
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proc icepick_c_tapenable {jrc port} {
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# First CONNECT to the ICEPick
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# echo "Connecting to ICEPick"
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icepick_c_connect $jrc
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# echo "Configuring the ICEpick"
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icepick_c_setup $jrc
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# NOTE: it's important not to enter RUN/IDLE state until
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# done sending these instructions and data to the ICEpick.
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# And never to enter RESET, which will disable the TAPs.
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# first enable power and clock for TAP
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icepick_c_router $jrc 1 0x2 $port 0x100048
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# TRM states that the register should be read back here, skipped for now
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# enable debug "default" mode
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icepick_c_router $jrc 1 0x2 $port 0x102048
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# TRM states that debug enable and debug mode should be read back and
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# confirmed - skipped for now
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# Finally select the tap
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icepick_c_router $jrc 1 0x2 $port 0x102148
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# Enter the bypass state
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irscan $jrc [CONST IR_BYPASS] -endstate RUN/IDLE
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runtest 10
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}
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# jrc == TAP name for the ICEpick
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# coreid== core id number 0..15 (not same as port number!)
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proc icepick_d_set_coreid {jrc coreid } {
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icepick_c_router $jrc 1 0x6 $coreid 0x2008
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}
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# jrc == TAP name for the ICEpick
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# port == a port number, 0..15
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# Follow the sequence described in
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# http://processors.wiki.ti.com/images/f/f6/Router_Scan_Sequence-ICEpick-D.pdf
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proc icepick_d_tapenable {jrc port coreid} {
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# First CONNECT to the ICEPick
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icepick_c_connect $jrc
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icepick_c_setup $jrc
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# Select the port
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icepick_c_router $jrc 1 0x2 $port 0x2108
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# Set 4 bit core ID to the Cortex-A
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icepick_d_set_coreid $jrc $coreid
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# Enter the bypass state
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irscan $jrc [CONST IF_BYPASS] -endstate RUN/IDLE
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runtest 10
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}
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# This function uses the ICEPick to send a warm system reset
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proc icepick_c_wreset {jrc} {
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# send a router write, block is 0, register is 1, value is 0x2100
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icepick_c_router $jrc 1 0x0 0x1 0x002101
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}
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