1.. SPDX-License-Identifier: GPL-2.0 2 3====================================== 4README file for the dc395x SCSI driver 5====================================== 6 7Status 8------ 9The driver has been tested with CD-R and CD-R/W drives. These should 10be safe to use. Testing with hard disks has not been done to any 11great degree and caution should be exercised if you want to attempt 12to use this driver with hard disks. 13 14This is a 2.5 only driver. For a 2.4 driver please see the original 15driver (which this driver started from) at 16http://www.garloff.de/kurt/linux/dc395/ 17 18Problems, questions and patches should be submitted to the mailing 19list. Details on the list, including archives, are available at 20http://lists.twibble.org/mailman/listinfo/dc395x/ 21 22Parameters 23---------- 24The driver uses the settings from the EEPROM set in the SCSI BIOS 25setup. If there is no EEPROM, the driver uses default values. 26Both can be overridden by command line parameters (module or kernel 27parameters). 28 29The following parameters are available: 30 31safe 32 Default: 0, Acceptable values: 0 or 1 33 34 If safe is set to 1 then the adapter will use conservative 35 ("safe") default settings. This sets: 36 37 shortcut for dc395x=7,4,9,15,2,10 38 39adapter_id 40 Default: 7, Acceptable values: 0 to 15 41 42 Sets the host adapter SCSI ID. 43 44max_speed 45 Default: 1, Acceptable value: 0 to 7 46 47 == ======== 48 0 20 Mhz 49 1 12.2 Mhz 50 2 10 Mhz 51 3 8 Mhz 52 4 6.7 Mhz 53 5 5.8 Hhz 54 6 5 Mhz 55 7 4 Mhz 56 == ======== 57 58dev_mode 59 Bitmap for device configuration 60 61 DevMode bit definition: 62 63 === ======== ======== ========================================= 64 Bit Val(hex) Val(dec) Meaning 65 === ======== ======== ========================================= 66 0 0x01 1 Parity check 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 === ======== ======== ========================================= 73 74adapter_mode 75 Bitmap for adapter configuration 76 77 AdaptMode bit definition 78 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 ===== ======== ======== ==================================================== 89 90tags 91 Default: 3, Acceptable values: 0-5 92 93 The number of tags is 1<<x, if x has been specified 94 95reset_delay 96 Default: 1, Acceptable values: 0-180 97 98 The seconds to not accept commands after a SCSI Reset 99 100 101For the built in driver the parameters should be prefixed with 102dc395x. (eg "dc395x.safe=1") 103 104 105Copyright 106--------- 107The driver is free software. It is protected by the GNU General Public 108License (GPL). Please read it, before using this driver. It should be 109included in your kernel sources and with your distribution. It carries the 110filename COPYING. If you don't have it, please ask me to send you one by 111email. 112 113Note: The GNU GPL says also something about warranty and liability. 114Please be aware the following: While we do my best to provide a working and 115reliable driver, there is a chance, that it will kill your valuable data. 116We refuse to take any responsibility for that. The driver is provided as-is 117and YOU USE IT AT YOUR OWN RESPONSIBILITY. 118