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jcastillo |
README file for the Linux g_NCR5380 driver.
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(c) 1993 Drew Eckhard
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NCR53c400 extensions (c) 1994,1995,1996 Kevin Lentin
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This file documents the NCR53c400 extensions by Kevin Lentin and some
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enhancements to the NCR5380 core.
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This driver supports both NCR5380 and NCR53c400 cards in port or memory
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mapped modes. Currently this driver can only support one of those mapping
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modes at a time but it does support both of these chips at the same time.
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The next release of this driver will support port & memory mapped cards at
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the same time. It should be able to handle multiple different cards in the
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same machine.
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The drivers/scsi/Makefile has an override in it for the most common
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NCR53c400 card, the Trantor T130B in its default configuration:
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Port: 0x350
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IRQ : 5
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The NCR53c400 does not support DMA but it does have Pseudo-DMA which is
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supported by the driver.
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If the default configuration does not work for you, you can use the kernel
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command lines (eg using the lilo append command):
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ncr5380=port,irq,dma
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ncr53c400=port,irq
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or
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ncr5380=base,irq,dma
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ncr53c400=base,irq
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The driver does not probe for any addresses or ports other than those in
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the OVERRIDE or given to the kernel as above.
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This driver provides some information on what it has detected in
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/proc/scsi/g_NCR5380/x where x is the scsi card number as detected at boot
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time. More info to come in the future.
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When NCR53c400 support is compiled in, BIOS parameters will be returned by
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the driver (the raw 5380 driver does not and I don't plan to fiddle with
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it!).
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This driver works as a module.
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When included as a module, parameters can be passed on the insmod/modprobe
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command line:
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ncr_irq=xx the interrupt
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ncr_addr=xx the port or base address (for port or memory
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mapped, resp.)
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ncr_dma=xx the DMA
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ncr_5380=1 to set up for a NCR5380 board
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ncr_53c400=1 to set up for a NCR53C400 board
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e.g.
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modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_5380=1
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for a port mapped NCR5380 board or
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modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1
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for a memory mapped NCR53C400 board with interrupts disabled.
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(255 should be specified for no or DMA interrupt, 254 to autoprobe for an
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IRQ line if overridden on the command line.)
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Kevin Lentin
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K.Lentin@cs.monash.edu.au
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