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Diffstat (limited to 'drivers/staging/gs_fpgaboot/README')
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diff --git a/drivers/staging/gs_fpgaboot/README b/drivers/staging/gs_fpgaboot/README deleted file mode 100644 index ec1235a21bcc..000000000000 --- a/drivers/staging/gs_fpgaboot/README +++ /dev/null @@ -1,70 +0,0 @@ -============================================================================== -Linux Driver Source for Xilinx FPGA firmware download -============================================================================== - - -TABLE OF CONTENTS. - -1. SUMMARY -2. BACKGROUND -3. DESIGN -4. HOW TO USE -5. REFERENCE - -1. SUMMARY - - - Download Xilinx FPGA firmware - - This module downloads Xilinx FPGA firmware using gpio pins. - -2. BACKGROUND - - An FPGA (Field Programmable Gate Array) is a programmable hardware that is - used in various applications. Hardware design needs to programmed through - a dedicated device or CPU assisted way (serial or parallel). - This driver provides a way to download FPGA firmware. - -3. DESIGN - - - load Xilinx FPGA bitstream format[1] firmware image file using - kernel firmware framework, request_firmware() - - program the Xilinx FPGA using SelectMAP (parallel) mode [2] - - FPGA prgram is done by gpio based bit-banging, as an example - - platform independent file: gs_fpgaboot.c - - platform dependent file: io.c - -4. HOW TO USE - - $ insmod gs_fpga.ko file="xlinx_fpga_top_bitstream.bit" - $ rmmod gs_fpga - -5. USE CASE (from a mailing list discussion with Greg) - - a. As an FPGA development support tool, - During FPGA firmware development, you need to download a new FPGA - image frequently. - You would do that with a dedicated JTAG, which usually a limited - resource in the lab. - However, if you use my driver, you don't have to have a dedicated JTAG. - This is a real gain :) - - b. For the FPGA that runs without config after the download, which - doesn't talk to any of Linux interfaces (such as PCIE). - - We download FPGA firmware from user triggered or some other way, and that's it. - Since that FPGA runs on its own, it doesn't require a linux driver - after the download. - - c. For the FPGA that requires config after the download, which talk to - any of linux interfaces (such as PCIE) - - Then, this type of FPGA config can be put into device tree and have a - separate driver (pcie or others), then THAT driver calls my driver to - download FPGA firmware during the Linux boot, the take over the device - through the interface. - -6. REFERENCE - - 1. Xilinx APP NOTE XAPP583: - https://www.xilinx.com/support/documentation/application_notes/xapp583-fpga-configuration.pdf - 2. bitstream file info: - http://home.earthlink.net/~davesullins/software/bitinfo.html |