1 .. SPDX-License-Identifier: GPL-2.0 2 3 ====================================== 4 README file for the dc395x SCSI driver 5 ====================================== 6 7 Status 8 ------ 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. 13 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/ 17 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/ 21 22 Parameters 23 ---------- 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 27 parameters). 28 29 The following parameters are available: 30 31 safe 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 39 adapter_id 40 Default: 7, Acceptable values: 0 to 15 41 42 Sets the host adapter SCSI ID. 43 44 max_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 58 dev_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 74 adapter_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 90 tags 91 Default: 3, Acceptable values: 0-5 92 93 The number of tags is 1<<x, if x has been specified 94 95 reset_delay 96 Default: 1, Acceptable values: 0-180 97 98 The seconds to not accept commands after a SCSI Reset 99 100 101 For the built in driver the parameters should be prefixed with 102 dc395x. (eg "dc395x.safe=1") 103 104 105 Copyright 106 --------- 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 111 email. 112 113 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. 118