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Commit	Line	Data
	1	This library emulates Jungo Windrvr USB and parallel port functions in
	2	userspace which are required by XILINX impact to access the Platform cable USB
	3	and Parallel Cable III.
	4	With this library it is possible to access the cables without loading a
	5	proprietary kernel module which breaks with every new kernel release. It uses
	6	the functionality provided by the libusb userspace library for USB access and
	7	the kernel interface at /dev/parport0 for parallel port access instead and
	8	should work on every kernel version which is supported by libusb and supports
	9	ppdev. It was written against impact from ISE Webpack 9.1SP1 and tested with
	10	the following software:
	11
	12	* ISE Webpack 9.1SP2
	13	* ISE Webpack 9.1SP1
	14	* ISE Webpack 8.2SP3
	15	* ISE Webpack 8.1SP3
	16	* ChipScope 9.1.02i
	17	* EDK 8.2.02i
	18
	19	Build the library by calling `make'.
	20
	21	To use this library you have to preload the library before starting impact:
	22
	23	$ LD_PRELOAD=/path/to/libusb-driver.so impact
	24	or
	25	$ export LD_PRELOAD=/path/to/libusb-driver.so (for sh shells)
	26	$ setenv LD_PRELOAD /path/to/libusb-driver.so (for csh shells)
	27	$ impact
	28
	29	The source for this library can be found at:
	30	http://cvs.zerfleddert.de/cgi-bin/viewcvs.cgi/usb-driver/
	31
	32
	33	Notes for the USB cable
	34	=======================
	35
	36	To use the device as an ordinary user, put the following line in a new
	37	file in /etc/udev/rules.d/ and restart udev:
	38	ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"
	39
	40
	41	If your cable does not have the ID 03fd:0008 in the output of lsusb,
	42	the initial firmware has not been loaded (loading it changes the
	43	product-ID from another value to 8). To load the firmware follow
	44	these steps:
	45
	46	1. If you have no /etc/udev/rules.d/xusbdfwu.rules file, copy it from
	47	/path/to/ISE/bin/lin/xusbdfwu.rules to /etc/udev/rules.d/xusbdfwu.rules
	48
	49	2. Install the package containing /sbin/fxload from your linux distribution.
	50	It is usually called "fxload"
	51
	52	3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex
	53
	54	4. restart udev and re-plug the cable
	55
	56
	57	Notes for the parallel cable
	58	============================
	59
	60	To access the parallel port from userspace, the kernel needs to be built with
	61	the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware"
	62	(CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers"
	63	(CONFIG_PPDEV) builtin or as modules. If these features are built as modules,
	64	they need to be loaded before using this library.
	65	These modules are called:
	66	parport
	67	parport_pc
	68	ppdev
	69
	70
	71	To use the device as an ordinary user, put the user in the group 'lp'
	72
	73
	74	Parallel Cable IV is currently only supported in 'compatibility mode', as no
	75	attempt to configure the ECP registers is done by this library.
	76
	77
	78	If you get "Programming failed" or "DONE did not go high" when programming
	79	through the parallel cable with Impact 9.1, make sure to have the option "Use
	80	HIGHZ instead of BYPASS" enabled in Edit -> Preferences -> iMPACT Configuration
	81	Preferences.
	82	If you are using batch mode, add the following line to your cmd file:
	83	setPreference -pref UseHighz:TRUE
	84	(This problem also occurs on windows and when using the real windrvr in linux and
	85	is solved with the same workaround. Impact 8.2 is working fine with the same
	86	boards and designs)