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[usb-driver] / README
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)
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