1 .. SPDX-License-Identifier: GPL-2.0
3 ======================================
4 README file for the dc395x SCSI driver
5 ======================================
9 The driver has been tested with CD-R and CD-R/W drives. These should
10 be safe to use. Testing with hard disks has not been done to any
11 great degree and caution should be exercised if you want to attempt
12 to use this driver with hard disks.
14 This is a 2.5 only driver. For a 2.4 driver please see the original
15 driver (which this driver started from) at
16 http://www.garloff.de/kurt/linux/dc395/
18 Problems, questions and patches should be submitted to the mailing
19 list. Details on the list, including archives, are available at
20 http://lists.twibble.org/mailman/listinfo/dc395x/
24 The driver uses the settings from the EEPROM set in the SCSI BIOS
25 setup. If there is no EEPROM, the driver uses default values.
26 Both can be overridden by command line parameters (module or kernel
29 The following parameters are available:
32 Default: 0, Acceptable values: 0 or 1
34 If safe is set to 1 then the adapter will use conservative
35 ("safe") default settings. This sets:
37 shortcut for dc395x=7,4,9,15,2,10
40 Default: 7, Acceptable values: 0 to 15
42 Sets the host adapter SCSI ID.
45 Default: 1, Acceptable value: 0 to 7
59 Bitmap for device configuration
61 DevMode bit definition:
63 === ======== ======== =========================================
64 Bit Val(hex) Val(dec) Meaning
65 === ======== ======== =========================================
67 1 0x02 2 Synchronous Negotiation
68 2 0x04 4 Disconnection
69 3 0x08 8 Send Start command on startup. (Not used)
70 4 0x10 16 Tagged Command Queueing
71 5 0x20 32 Wide Negotiation
72 === ======== ======== =========================================
75 Bitmap for adapter configuration
77 AdaptMode bit definition
79 ===== ======== ======== ====================================================
80 Bit Val(hex) Val(dec) Meaning
81 ===== ======== ======== ====================================================
82 0 0x01 1 Support more than two drives. (Not used)
83 1 0x02 2 Use DOS compatible mapping for HDs greater than 1GB.
84 2 0x04 4 Reset SCSI Bus on startup.
85 3 0x08 8 Active Negation: Improves SCSI Bus noise immunity.
86 4 0x10 16 Immediate return on BIOS seek command. (Not used)
87 (*)5 0x20 32 Check for LUNs >= 1.
88 ===== ======== ======== ====================================================
91 Default: 3, Acceptable values: 0-5
93 The number of tags is 1<<x, if x has been specified
96 Default: 1, Acceptable values: 0-180
98 The seconds to not accept commands after a SCSI Reset
101 For the built in driver the parameters should be prefixed with
102 dc395x. (eg "dc395x.safe=1")
107 The driver is free software. It is protected by the GNU General Public
108 License (GPL). Please read it, before using this driver. It should be
109 included in your kernel sources and with your distribution. It carries the
110 filename COPYING. If you don't have it, please ask me to send you one by
113 Note: The GNU GPL says also something about warranty and liability.
114 Please be aware the following: While we do my best to provide a working and
115 reliable driver, there is a chance, that it will kill your valuable data.
116 We refuse to take any responsibility for that. The driver is provided as-is
117 and YOU USE IT AT YOUR OWN RESPONSIBILITY.