Documentation/scsi/dc395x.txt

   1 README file for the dc395x SCSI driver
   2 ==========================================
   3
   4 Status
   5 ------
   6 The driver has been tested with CD-R and CD-R/W drives. These should
   7 be safe to use. Testing with hard disks has not been done to any
   8 great degree and caution should be exercised if you want to attempt
   9 to use this driver with hard disks.
  10
  11 This is a 2.5 only driver. For a 2.4 driver please see the original
  12 driver (which this driver started from) at
  13 http://www.garloff.de/kurt/linux/dc395/
  14
  15 Problems, questions and patches should be submitted to the mailing
  16 list. Details on the list, including archives, are available at
  17 http://lists.twibble.org/mailman/listinfo/dc395x/
  18
  19 Parameters
  20 ----------
  21 The driver uses the settings from the EEPROM set in the SCSI BIOS
  22 setup. If there is no EEPROM, the driver uses default values.
  23 Both can be overridden by command line parameters (module or kernel
  24 parameters).
  25
  26 The 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
  87 For the built  in driver the parameters should be prefixed with
  88 dc395x. (eg "dc395x.safe=1")
  89
  90
  91 Copyright
  92 ---------
  93 The driver is free software. It is protected by the GNU General Public
  94 License (GPL). Please read it, before using this driver. It should be
  95 included in your kernel sources and with your distribution. It carries the
  96 filename COPYING. If you don't have it, please ask me to send you one by
  97 email.
  98 Note: The GNU GPL says also something about warranty and liability.
  99 Please be aware the following: While we do my best to provide a working and
 100 reliable driver, there is a chance, that it will kill your valuable data.
 101 We refuse to take any responsibility for that. The driver is provided as-is
 102 and YOU USE IT AT YOUR OWN RESPONSIBILITY.