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- README file for the dc395x SCSI driver
- ==========================================
- Status
- ------
- The driver has been tested with CD-R and CD-R/W drives. These should
- be safe to use. Testing with hard disks has not been done to any
- great degree and caution should be exercised if you want to attempt
- to use this driver with hard disks.
- This is a 2.5 only driver. For a 2.4 driver please see the original
- driver (which this driver started from) at
- http://www.garloff.de/kurt/linux/dc395/
- Problems, questions and patches should be submitted to the mailing
- list. Details on the list, including archives, are available at
- http://lists.twibble.org/mailman/listinfo/dc395x/
- Parameters
- ----------
- The driver uses the settings from the EEPROM set in the SCSI BIOS
- setup. If there is no EEPROM, the driver uses default values.
- Both can be overridden by command line parameters (module or kernel
- parameters).
- The following parameters are available:
- - safe
- Default: 0, Acceptable values: 0 or 1
- If safe is set to 1 then the adapter will use conservative
- ("safe") default settings. This sets:
- shortcut for dc395x=7,4,9,15,2,10
- - adapter_id
- Default: 7, Acceptable values: 0 to 15
- Sets the host adapter SCSI ID.
- - max_speed
- Default: 1, Acceptable value: 0 to 7
- 0 = 20 Mhz
- 1 = 12.2 Mhz
- 2 = 10 Mhz
- 3 = 8 Mhz
- 4 = 6.7 Mhz
- 5 = 5.8 Hhz
- 6 = 5 Mhz
- 7 = 4 Mhz
- - dev_mode
- Bitmap for device configuration
- DevMode bit definition:
- Bit Val(hex) Val(dec) Meaning
- *0 0x01 1 Parity check
- *1 0x02 2 Synchronous Negotiation
- *2 0x04 4 Disconnection
- *3 0x08 8 Send Start command on startup. (Not used)
- *4 0x10 16 Tagged Command Queueing
- *5 0x20 32 Wide Negotiation
- - adapter_mode
- Bitmap for adapter configuration
- AdaptMode bit definition
- Bit Val(hex) Val(dec) Meaning
- *0 0x01 1 Support more than two drives. (Not used)
- *1 0x02 2 Use DOS compatible mapping for HDs greater than 1GB.
- *2 0x04 4 Reset SCSI Bus on startup.
- *3 0x08 8 Active Negation: Improves SCSI Bus noise immunity.
- 4 0x10 16 Immediate return on BIOS seek command. (Not used)
- (*)5 0x20 32 Check for LUNs >= 1.
- - tags
- Default: 3, Acceptable values: 0-5
-
- The number of tags is 1<<x, if x has been specified
- - reset_delay
- Default: 1, Acceptable values: 0-180
- The seconds to not accept commands after a SCSI Reset
- For the built in driver the parameters should be prefixed with
- dc395x. (eg "dc395x.safe=1")
- Copyright
- ---------
- The driver is free software. It is protected by the GNU General Public
- License (GPL). Please read it, before using this driver. It should be
- included in your kernel sources and with your distribution. It carries the
- filename COPYING. If you don't have it, please ask me to send you one by
- email.
- Note: The GNU GPL says also something about warranty and liability.
- Please be aware the following: While we do my best to provide a working and
- reliable driver, there is a chance, that it will kill your valuable data.
- We refuse to take any responsibility for that. The driver is provided as-is
- and YOU USE IT AT YOUR OWN RESPONSIBILITY.
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