Commit 7614478d authored by Oliver Neukum's avatar Oliver Neukum Committed by James Bottomley

[PATCH] improve Documentation for DC395

this improves the Documentation for the DC395 driver for 2.5.
 dc395x.txt |   94 ++++++++++++++++++++++++++++++++++++++++---------------------
 1 files changed, 62 insertions(+), 32 deletions(-)
parent 22359323
......@@ -23,17 +23,36 @@ setup. If there is no EEPROM, the driver uses default values.
Both can be overriden by command line parameters (module or kernel
parameters).
The syntax is as follows:
dc395x = AdapterID, SpeedIdx, DevMode, AdaptMode, Tags, DelayReset
The following parameters are available:
AdapterID : Host Adapter SCSI ID
SpeedIdx : 0,1,...7 = 20,13.3,10,8,6.7,5.8,5,4 MHz [ 7]
DevMode : Bitmap for Dev Cfg [63]
AdaptMode : Bitmap for Adapter Cfg [47]
Tags : The number of tags is 1<<x, if x has been specified [ 4]
DelayReset: The seconds to not accept commands after a SCSI Reset [ 1]
- safe
Default: 0, Acceptable values: 0 or 1
DevMode bit definition:
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
......@@ -42,7 +61,10 @@ DevMode bit definition:
*4 0x10 16 Tagged Command Queueing
*5 0x20 32 Wide Negotiation
AdaptMode bit definition
- 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.
......@@ -51,12 +73,20 @@ AdaptMode bit definition
4 0x10 16 Immediate return on BIOS seek command. (Not used)
(*)5 0x20 32 Check for LUNs >= 1.
If you set AdapterID to -1, the adapter will use conservative
("safe") default settings instead; more precisely, dc395x=-1 is a
shortcut for dc395x=7,4,9,15,2,10
- 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")
If you specify -2 for a value, it will be ignored. You don't need to
specify all six parameters.
Copyright
---------
......
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