xilinx-dna.cfg: generic tools for reading Xilinx Device DNA

[openocd.git] / tcl / fpga / xilinx-dna.cfg

diff --git a/tcl/fpga/xilinx-dna.cfg b/tcl/fpga/xilinx-dna.cfg
new file mode 100644 (file)
index 0000000..a1d5ba3
--- /dev/null
+++ b/tcl/fpga/xilinx-dna.cfg
@@ -0,0 +1,43 @@
+proc xilinx_dna_addr {chip} {
+       array set addrs {
+               Spartan6 0x30
+               Series7 0x17
+       }
+       return $addrs($chip)
+}
+
+# Get the "Device DNA".
+# Most Xilinx FPGA devices contain an embedded, unique device identifier.
+# The identifier is nonvolatile, permanently programmed into
+# the FPGA, and is unchangeable providing a great serial / tracking number.
+# This function returns the DNA as a 64 bit integer with the 7 LSBs zeroed.
+# This is compatible with the FUSE DNA which contains all 64 bits.
+proc xilinx_get_dna {tap chip} {
+       set XC7_ISC_ENABLE 0x10
+       set XC7_ISC_DISABLE 0x16
+       set XC7_ISC_DNA [xilinx_dna_addr $chip]
+
+       irscan $tap $XC7_ISC_ENABLE
+       runtest 64
+       irscan $tap $XC7_ISC_DNA
+       scan [drscan $tap 32 0 32 0] "%08x %08x" hi lo
+       runtest 64
+       irscan $tap $XC7_ISC_DISABLE
+       runtest 64
+       # openocd interprets DR scans as LSB first, bit-reverse it
+       return [scan [string reverse [format "%032b%032bb0" $lo $hi]] "%i"]
+}
+
+# Print out the "Device DNA" in the same format that impact uses.
+proc xilinx_print_dna {dna} {
+       set dna [expr $dna >> 64 - 57]
+       echo [format "DNA = %057b (0x%016x)" $dna $dna]
+}
+
+proc xc7_get_dna {tap} {
+       return [xilinx_get_dna $tap Series7]
+}
+
+proc xc6s_get_dna {tap} {
+       return [xilinx_get_dna $tap Spartan6]
+}