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tcl: Support for reading "Device DNA" from Spartan 6 devices. 

Most Xilinx FPGA devices contain an embedded, unique device identifier
called the "Device DNA". The identifier is nonvolatile, permanently
programmed into the FPGA, and is unchangeable providing a great serial
/ tracking number.

Debugging was done in https://github.com/timvideos/HDMI2USB/issues/36

Change-Id: Iad03eafb40887f0321a4dc22858a7c3bf37a12b3
Signed-off-by: Tim 'mithro' Ansell <mithro@mithis.com>
Reviewed-on: http://openocd.zylin.com/2960
Tested-by: jenkins
Reviewed-by: Paul Fertser <fercerpav@gmail.com>
__archive__
Tim 'mithro' Ansell 2015-09-27 20:09:38 +10:00 committed by Paul Fertser
parent 41daa32351
commit 3edb15784e
1 changed files with 36 additions and 0 deletions
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36
tcl/cpld/xilinx-xc6s.cfg
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@ -52,3 +52,39 @@ proc xc6s_program_iprog {tap} {
irscan $tap $XC6S_BYPASS irscan $tap $XC6S_BYPASS
runtest 1 runtest 1
} }
set XC6S_ISC_ENABLE 0x10
set XC6S_ISC_DISABLE 0x16
set XC6S_ISC_DNA 0x30
# Get the "Device DNA" from the Spartan 6.
# Most Xilinx FPGA devices contain an embedded, unique device identifier called
# the "Device DNA". The identifier is nonvolatile, permanently programmed into
# the FPGA, and is unchangeable providing a great serial / tracking number.
proc xc6s_get_dna {tap} {
global XC6S_ISC_ENABLE XC6S_ISC_DISABLE XC6S_ISC_DNA
irscan $tap $XC6S_ISC_ENABLE
runtest 64
irscan $tap $XC6S_ISC_DNA
# Device DNA is 57 bits long, but we can only read 32bits at a time
# with OpenOCD.
set dna [drscan $tap 16 0 16 0 16 0 9 0]
runtest 64
irscan $tap $XC6S_ISC_DISABLE
runtest 64
# Convert the binary data into the order impact uses
scan $dna "%x %x %x %x" v1 v2 v3 v4
set bin_dna [string reverse [concat [format "%09b" $v4][format "%016b" $v3][format "%016b" $v2][format "%016b" $v1]]]
# Return a hex version of binary
scan [format "0b%s" $bin_dna] "%i" hex_dna
return $hex_dna
}
# Print out the "Device DNA" in the same format that impact uses.
proc xc6s_print_dna {tap} {
set hex_dna [xc6s_get_dna $tap]
puts [format "DNA = %57b (0x%x)\n" $hex_dna $hex_dna]
}