linux/Documentation/input/cs461x.txt
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Prefs
   1Preface.
   2
   3This is a new low-level driver to support analog joystick attached to
   4Crystal SoundFusion CS4610/CS4612/CS4615. This code is based upon 
   5Vortex/Solo drivers as an example of decoration style, and ALSA
   60.5.8a kernel drivers as an chipset documentation and samples.
   7
   8This version does not have cooked mode support; the basic code 
   9is present here, but have not tested completely. The button analysis 
  10is completed in this mode, but the axis movement is not. 
  11
  12Raw mode works fine with analog joystick front-end driver and cs461x
  13driver as a backend. I've tested this driver with CS4610, 4-axis and 
  144-button joystick; I mean the jstest utility. Also I've tried to
  15play in xracer game using joystick, and the result is better than
  16keyboard only mode.
  17
  18The sensitivity and calibrate quality have not been tested; the two
  19reasons are performed: the same hardware cannot work under Win95 (blue 
  20screen in VJOYD); I have no documentation on my chip; and the existing 
  21behavior in my case was not raised the requirement of joystick calibration. 
  22So the driver have no code to perform hardware related calibration.
  23
  24The patch contains minor changes of Config.in and Makefile files. All
  25needed code have been moved to one separate file cs461x.c like ns558.c
  26This driver have the basic support for PCI devices only; there is no
  27ISA or PnP ISA cards supported. AFAIK the ns558 have support for Crystal 
  28ISA and PnP ISA series.
  29
  30The driver works with ALSA drivers simultaneously. For example, the xracer
  31uses joystick as input device and PCM device as sound output in one time.
  32There are no sound or input collisions detected. The source code have
  33comments about them; but I've found the joystick can be initialized 
  34separately of ALSA modules. So, you can use only one joystick driver
  35without ALSA drivers. The ALSA drivers are not needed to compile or
  36run this driver.
  37
  38There are no debug information print have been placed in source, and no
  39specific options required to work this driver. The found chipset parameters
  40are printed via printk(KERN_INFO "..."), see the /var/log/messages to
  41inspect cs461x: prefixed messages to determine possible card detection 
  42errors.
  43
  44Regards,
  45Viktor
  46
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