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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 overriden 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. | ||