Messages in this thread | | | From | Dragan Cvetic <> | Subject | [PATCH 00/12] misc: xilinx sd-fec driver | Date | Tue, 19 Mar 2019 12:04:12 +0000 |
| |
This patchset is adding the full Soft Decision Forward Error Correction (SD-FEC) driver implementation, driver DT binding and driver documentation.
Forward Error Correction (FEC) codes such as Low Density Parity Check (LDPC) and turbo codes provide a means to control errors in data transmissions over unreliable or noisy communication channels. The SD-FEC Integrated Block is an optimized block for soft-decision decoding of these codes. Fixed turbo codes are supported directly, whereas custom and standardized LDPC codes are supported through the ability to specify the parity check matrix through an AXI4-Lite bus or using the optional programmable (PL)-based support logic. For the further information see https://www.xilinx.com/support/documentation/ip_documentation/ sd_fec/v1_1/pg256-sdfec-integrated-block.pdf
This driver is a platform device driver which supports SDFEC16 (16nm) IP. SD-FEC driver supports LDPC decoding and encoding and Turbo code decoding. LDPC codes can be specified on a codeword-by-codeword basis, also a custom LDPC code can be used.
The SD-FEC driver exposes a char device interface and supports file operations: open(), close(), poll() and ioctl(). The driver allows only one usage of the device, open() limits the number of driver instances. The driver also utilize Common Clock Framework (CCF).
The control and monitoring is supported over ioctl system call. The features supported by ioctl(): - enable or disable data pipes to/from device - configure the FEC algorithm parameters - set the order of data - provide a control of a SDFEC bypass option - activates/deactivates SD-FEC - collect and provide statistical data - enable/disable interrupt mode
Poll can be utilized to detect errors on IRQ trigger rather than using looping status and stats ioctl's.
Reviewed-by: Michal Simek <michal.simek@xilinx.com> Tested-by: Santhosh Dyavanapally <SDYAVANA@xilinx.com> Tested by: Punnaiah Choudary Kalluri <punnaia@xilinx.com> Tested-by: Dragan Cvetic <dragan.cvetic@xilinx.com> Tested-by: Derek Kiernan <derek.kiernan@xilinx.com> Signed-off-by: Derek Kiernan <derek.kiernan@xilinx.com> Signed-off-by: Dragan Cvetic <dragan.cvetic@xilinx.com>
Dragan Cvetic (12): dt-bindings: xilinx-sdfec: Add SDFEC binding misc: xilinx-sdfec: add core driver misc: xilinx_sdfec: Add CCF support misc: xilinx_sdfec: Add open, close and ioctl misc: xilinx_sdfec: Store driver config and state misc: xilinx_sdfec: Add ability to configure turbo mode misc: xilinx_sdfec: Add ability to configure LDPC misc: xilinx_sdfec: Add ability to get/set config misc: xilinx_sdfec: Support poll file operation misc: xilinx_sdfec: Add stats & status ioctls Docs: misc: xilinx_sdfec: Add documentation MAINTAINERS: add maintainer for SD-FEC support
.../devicetree/bindings/misc/xlnx,sd-fec.txt | 58 + Documentation/misc-devices/index.rst | 1 + Documentation/misc-devices/xilinx_sdfec.rst | 286 ++++ MAINTAINERS | 12 + drivers/misc/Kconfig | 12 + drivers/misc/Makefile | 1 + drivers/misc/xilinx_sdfec.c | 1683 ++++++++++++++++++++ include/uapi/misc/xilinx_sdfec.h | 470 ++++++ 8 files changed, 2523 insertions(+) create mode 100644 Documentation/devicetree/bindings/misc/xlnx,sd-fec.txt create mode 100644 Documentation/misc-devices/xilinx_sdfec.rst create mode 100644 drivers/misc/xilinx_sdfec.c create mode 100644 include/uapi/misc/xilinx_sdfec.h
-- 2.7.4
This email and any attachments are intended for the sole use of the named recipient(s) and contain(s) confidential information that may be proprietary, privileged or copyrighted under applicable law. If you are not the intended recipient, do not read, copy, or forward this email message or any attachments. Delete this email message and any attachments immediately.
| |