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jtag: drivers: xlnx-pcie-xvc: Add support for Xilinx XVC/PCIe

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Add support for Xilinx Virtual Cable over PCIe JTAG controller.
It is commonly used in Xilinx based PCI Express designs with JTAG IP
in the FPGA fabric.

Access to the JTAG registers happens via the PCI Express extended
configuration space.

This can be used to debug soft-cores instantiated in the FPGA fabric.

The clang static checker doesn't find any new problems with this change.

Change-Id: Ib12ede0d1f26dacfda808d5e05b947b640c5bde7
Signed-off-by: Moritz Fischer <moritzf@google.com>
Reviewed-on: http://openocd.zylin.com/5314
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Marex
Reviewed-by: Oleksij Rempel <linux@rempel-privat.de>
This commit is contained in:
Moritz Fischer
2019-10-03 20:25:26 -07:00
committed by Oleksij Rempel
parent f22883e8c1
commit ff6d0704ec
5 changed files with 532 additions and 1 deletions
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22
doc/openocd.texi
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@@ -617,6 +617,9 @@ produced, PDF schematics are easily found and it is easy to make.
@* A JTAG driver acting as a client for the JTAG VPI server interface.
@* Link: @url{http://github.com/fjullien/jtag_vpi}
@item @b{xlnx_pcie_xvc}
@* A JTAG driver exposing Xilinx Virtual Cable over PCI Express to OpenOCD as JTAG interface.
@end itemize
@node About Jim-Tcl
@@ -3127,6 +3130,25 @@ opendous-jtag is a freely programmable USB adapter.
This is the Keil ULINK v1 JTAG debugger.
@end deffn
@deffn {Interface Driver} {xlnx_pcie_xvc}
This driver supports the Xilinx Virtual Cable (XVC) over PCI Express.
It is commonly found in Xilinx based PCI Express designs. It allows debugging
fabric based JTAG devices such as Cortex-M1/M3 microcontrollers. Access to this is
exposed via extended capability registers in the PCI Express configuration space.
For more information see Xilinx PG245 (Section on From_PCIE_to_JTAG mode).
@deffn {Config Command} {xlnx_pcie_xvc_config} device
Specifies the PCI Express device via parameter @var{device} to use.
The correct value for @var{device} can be obtained by looking at the output
of lscpi -D (first column) for the corresponding device.
The string will be of the format "DDDD:BB:SS.F" such as "0000:65:00.1".
@end deffn
@end deffn
@deffn {Interface Driver} {ZY1000}
This is the Zylin ZY1000 JTAG debugger.
@end deffn