git.zerfleddert.de Git - usb-driver/blob - 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 9.1SP3
  13  * ISE Webpack 9.1SP2
  14  * ISE Webpack 9.1SP1
  15  * ISE Webpack 8.2SP3
  16  * ISE Webpack 8.1SP3
  17  * ChipScope 9.1.03i
  18  * ChipScope 9.1.02i
  19  * ChipScope 8.2.04i
  20  * EDK 8.2.02i
  21  * EDK 8.1.02i
  22
  23 In addition to the XILINX USB and parallel cables, devices based on the FTDI
  24 2232 serial converter chip are also experimentally supported. This includes
  25 devices like the Amontec JTAGkey(-Tiny).
  26
  27 Build the library by calling `make'.
  28
  29 To use this library you have to preload the library before starting impact:
  30
  31 $ LD_PRELOAD=/path/to/libusb-driver.so impact
  32 or
  33 $ export LD_PRELOAD=/path/to/libusb-driver.so  (for sh shells)
  34 $ setenv LD_PRELOAD /path/to/libusb-driver.so  (for csh shells)
  35 $ impact
  36
  37 The source for this library can be found at:
  38 http://cvs.zerfleddert.de/cgi-bin/viewcvs.cgi/usb-driver/
  39
  40 The main website is located at:
  41 http://www.rmdir.de/~michael/xilinx/
  42
  43
  44 Notes for the USB cable
  45 =======================
  46
  47 To use the device as an ordinary user, put the following line in a new
  48 file in /etc/udev/rules.d/ and restart udev:
  49 ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"
  50
  51
  52 If your cable does not have the ID 03fd:0008 in the output of lsusb,
  53 the initial firmware has not been loaded (loading it changes the
  54 product-ID from another value to 8). To load the firmware follow
  55 these steps:
  56
  57 1. If you have no /etc/udev/rules.d/xusbdfwu.rules file, copy it from
  58    /path/to/ISE/bin/lin/xusbdfwu.rules to /etc/udev/rules.d/xusbdfwu.rules
  59
  60 2. Install the package containing /sbin/fxload from your linux distribution.
  61    It is usually called "fxload"
  62
  63 3. copy the file /path/to/ISE/bin/lin/xusbdfwu.hex to /usr/share/xusbdfwu.hex
  64
  65 4. restart udev and re-plug the cable
  66
  67
  68 Notes for the parallel cable
  69 ============================
  70
  71 To access the parallel port from userspace, the kernel needs to be built with
  72 the features "Parallel port support" (CONFIG_PARPORT), "PC-style hardware"
  73 (CONFIG_PARPORT_PC) and "Support for user-space parallel port device drivers"
  74 (CONFIG_PPDEV) builtin or as modules. If these features are built as modules,
  75 they need to be loaded before using this library.
  76 These modules are called:
  77 parport
  78 parport_pc
  79 ppdev
  80
  81
  82 To use the device as an ordinary user, put the user in the group 'lp'
  83
  84
  85 If you have an almost compatible cable which works with other software but not
  86 with Impact, try adding -DFORCE_PC3_IDENT to the CFLAGS line in the Makefile.
  87 This enables a hack by Stefan Ziegenbalg to force detection of a parallel cable.
  88
  89
  90 Parallel Cable IV is currently only supported in 'compatibility mode', as no
  91 attempt to configure the ECP registers is done by this library.
  92
  93
  94 If you get "Programming failed" or "DONE did not go high" when programming
  95 through the parallel cable with Impact 9.1, make sure to have the option "Use
  96 HIGHZ instead of BYPASS" enabled in Edit -> Preferences -> iMPACT Configuration
  97 Preferences.
  98 If you are using batch mode, add the following line to your cmd file:
  99 setPreference -pref UseHighz:TRUE
 100 (This problem also occurs on windows and when using the real windrvr in linux
 101 and is solved with the same workaround. Impact 8.2 is working fine with the same
 102 boards and designs)
 103
 104
 105 Notes for FTDI 2232 based cables
 106 ================================
 107
 108 To build the driver with FTDI 2232 support, you need to have libftdi and
 109 the libftdi development package installed. On debian, you can install both
 110 by installing 'libftdi-dev'.
 111
 112 To set-up the device:
 113 1. Find out the vendor and product id of your cable using lsusb:
 114    Bus 003 Device 005: ID 0403:cff8 Future Technology Devices ...
 115                           ~~~~~~~~~
 116
 117 2. Copy the sample libusb-driverrc to ~/.libusb-driverrc, edit it and replace
 118    the vendor and product-id in the example file with the values from provided
 119    in the lsusb-output. You can also change the 'parallel port' which is mapped
 120    to this cable. Impact sees the device at that port as a Parallel Cable III.
 121
 122 3. To use the device as an ordinary user, put the following line in a new file
 123    in /etc/udev/rules.d/ and restart udev:
 124    ACTION=="add", BUS=="usb", SYSFS{idVendor}=="0403", SYSFS{idProduct}=="cff8", MODE="666"
 125    (replace the vendor and product id with your values)
 126
 127 The support for FTDI 2232 based devices is experimental and they are currently
 128 significantly slower than the other supported cables.