linux/Documentation/scsi/dc395x.txt
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   1README file for the dc395x SCSI driver
   2==========================================
   3
   4Status
   5------
   6The driver has been tested with CD-R and CD-R/W drives. These should
   7be safe to use. Testing with hard disks has not been done to any
   8great degree and caution should be exercised if you want to attempt
   9to use this driver with hard disks.
  10
  11This is a 2.5 only driver. For a 2.4 driver please see the original
  12driver (which this driver started from) at
  13http://www.garloff.de/kurt/linux/dc395/
  14
  15Problems, questions and patches should be submitted to the mailing
  16list. Details on the list, including archives, are available at
  17http://lists.twibble.org/mailman/listinfo/dc395x/
  18
  19Parameters
  20----------
  21The driver uses the settings from the EEPROM set in the SCSI BIOS 
  22setup. If there is no EEPROM, the driver uses default values.
  23Both can be overridden by command line parameters (module or kernel
  24parameters).
  25
  26The following parameters are available:
  27
  28 - safe
  29   Default: 0, Acceptable values: 0 or 1
  30
  31   If safe is set to 1 then the adapter will use conservative
  32   ("safe") default settings. This sets:
  33
  34                shortcut for dc395x=7,4,9,15,2,10
  35
  36 - adapter_id
  37   Default: 7, Acceptable values: 0 to 15
  38
  39   Sets the host adapter SCSI ID.
  40
  41 - max_speed
  42   Default: 1, Acceptable value: 0 to 7
  43   0 = 20   Mhz
  44   1 = 12.2 Mhz
  45   2 = 10   Mhz
  46   3 = 8    Mhz
  47   4 = 6.7  Mhz
  48   5 = 5.8  Hhz
  49   6 = 5    Mhz
  50   7 = 4    Mhz
  51
  52 - dev_mode
  53   Bitmap for device configuration
  54
  55   DevMode bit definition:
  56      Bit Val(hex) Val(dec)  Meaning
  57      *0    0x01       1     Parity check
  58      *1    0x02       2     Synchronous Negotiation
  59      *2    0x04       4     Disconnection
  60      *3    0x08       8     Send Start command on startup. (Not used)
  61      *4    0x10      16     Tagged Command Queueing
  62      *5    0x20      32     Wide Negotiation
  63
  64 - adapter_mode
  65   Bitmap for adapter configuration
  66
  67   AdaptMode bit definition
  68      Bit Val(hex) Val(dec)  Meaning
  69      *0    0x01       1     Support more than two drives. (Not used)
  70      *1    0x02       2     Use DOS compatible mapping for HDs greater than 1GB.
  71      *2    0x04       4     Reset SCSI Bus on startup.
  72      *3    0x08       8     Active Negation: Improves SCSI Bus noise immunity.
  73       4    0x10      16     Immediate return on BIOS seek command. (Not used)
  74    (*)5    0x20      32     Check for LUNs >= 1.
  75
  76 - tags
  77   Default: 3, Acceptable values: 0-5
  78   
  79   The number of tags is 1<<x, if x has been specified
  80
  81 - reset_delay
  82   Default: 1, Acceptable values: 0-180
  83
  84   The seconds to not accept commands after a SCSI Reset
  85
  86
  87For the built  in driver the parameters should be prefixed with
  88dc395x. (eg "dc395x.safe=1")
  89
  90
  91Copyright
  92---------
  93The driver is free software. It is protected by the GNU General Public
  94License (GPL). Please read it, before using this driver. It should be
  95included in your kernel sources and with your distribution. It carries the
  96filename COPYING. If you don't have it, please ask me to send you one by
  97email.
  98Note: The GNU GPL says also something about warranty and liability. 
  99Please be aware the following: While we do my best to provide a working and
 100reliable driver, there is a chance, that it will kill your valuable data. 
 101We refuse to take any responsibility for that. The driver is provided as-is
 102and YOU USE IT AT YOUR OWN RESPONSIBILITY.
 103
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