diff options
| -rw-r--r-- | NEWS | 1 | ||||
| -rw-r--r-- | tcl/target/pxa255.cfg | 35 |
2 files changed, 33 insertions, 3 deletions
@@ -39,6 +39,7 @@ Board, Target, and Interface Configuration Scripts: Samsung s3c2450 Mini2440 board Numeric TAP and Target identifiers now trigger warnings + PXA255 partially enumerates Documentation: Capture more debugging and setup advice diff --git a/tcl/target/pxa255.cfg b/tcl/target/pxa255.cfg index 1608d66c..7137621a 100644 --- a/tcl/target/pxa255.cfg +++ b/tcl/target/pxa255.cfg @@ -19,8 +19,37 @@ if { [info exists CPUTAPID ] } { set _CPUTAPID 0x69264013 } -jtag newtap $_CHIPNAME cpu -irlen 5 -ircapture 0x1e -irmask 0x1f -expected-id $_CPUTAPID +jtag newtap $_CHIPNAME cpu -irlen 5 -expected-id $_CPUTAPID set _TARGETNAME $_CHIPNAME.cpu -target create $_TARGETNAME xscale -endian $_ENDIAN -chain-position $_TARGETNAME -debug_level 3 +target create $_TARGETNAME xscale -endian $_ENDIAN \ + -chain-position $_CHIPNAME.cpu + +# PXA255 comes out of reset using 3.6864 MHz oscillator. +# Until the PLL kicks in, keep the JTAG clock slow enough +# that we get no errors. +jtag_khz 300 +$_TARGETNAME configure -event "reset-start" { jtag_khz 300 } + +# reset processing that works with PXA +proc init_reset {mode} { + # assert both resets; equivalent to power-on reset + jtag_reset 1 1 + + # drop TRST after at least 32 cycles + sleep 1 + jtag_reset 0 1 + + # minimum 32 TCK cycles to wake up the controller + runtest 50 + + # now the TAP will be responsive; validate scanchain + jtag arp_init + + # ... and take it out of reset + jtag_reset 0 0 +} + +proc jtag_init {} { + init_reset startup +} |