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diff --git a/Documentation/scsi/g_NCR5380.rst b/Documentation/scsi/g_NCR5380.rst new file mode 100644 index 000000000000..a282059fec43 --- /dev/null +++ b/Documentation/scsi/g_NCR5380.rst @@ -0,0 +1,93 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. include:: <isonum.txt> + +========================================== +README file for the Linux g_NCR5380 driver +========================================== + +Copyright |copy| 1993 Drew Eckhard + +NCR53c400 extensions Copyright |copy| 1994,1995,1996 Kevin Lentin + +This file documents the NCR53c400 extensions by Kevin Lentin and some +enhancements to the NCR5380 core. + +This driver supports NCR5380 and NCR53c400 and compatible cards in port or +memory mapped modes. + +Use of an interrupt is recommended, if supported by the board, as this will +allow targets to disconnect and thereby improve SCSI bus utilization. + +If the irq parameter is 254 or is omitted entirely, the driver will probe +for the correct IRQ line automatically. If the irq parameter is 0 or 255 +then no IRQ will be used. + +The NCR53c400 does not support DMA but it does have Pseudo-DMA which is +supported by the driver. + +This driver provides some information on what it has detected in +/proc/scsi/g_NCR5380/x where x is the scsi card number as detected at boot +time. More info to come in the future. + +This driver works as a module. +When included as a module, parameters can be passed on the insmod/modprobe +command line: + + ============= =============================================================== + irq=xx[,...] the interrupt(s) + base=xx[,...] the port or base address(es) (for port or memory mapped, resp.) + card=xx[,...] card type(s): + + == ====================================== + 0 NCR5380, + 1 NCR53C400, + 2 NCR53C400A, + 3 Domex Technology Corp 3181E (DTC3181E) + 4 Hewlett Packard C2502 + == ====================================== + ============= =============================================================== + +These old-style parameters can support only one card: + + ============= ================================================= + ncr_irq=xx the interrupt + ncr_addr=xx the port or base address (for port or memory + mapped, resp.) + ncr_5380=1 to set up for a NCR5380 board + ncr_53c400=1 to set up for a NCR53C400 board + ncr_53c400a=1 to set up for a NCR53C400A board + dtc_3181e=1 to set up for a Domex Technology Corp 3181E board + hp_c2502=1 to set up for a Hewlett Packard C2502 board + ============= ================================================= + +E.g. Trantor T130B in its default configuration:: + + modprobe g_NCR5380 irq=5 base=0x350 card=1 + +or alternatively, using the old syntax:: + + modprobe g_NCR5380 ncr_irq=5 ncr_addr=0x350 ncr_53c400=1 + +E.g. a port mapped NCR5380 board, driver to probe for IRQ:: + + modprobe g_NCR5380 base=0x350 card=0 + +or alternatively:: + + modprobe g_NCR5380 ncr_addr=0x350 ncr_5380=1 + +E.g. a memory mapped NCR53C400 board with no IRQ:: + + modprobe g_NCR5380 irq=255 base=0xc8000 card=1 + +or alternatively:: + + modprobe g_NCR5380 ncr_irq=255 ncr_addr=0xc8000 ncr_53c400=1 + +E.g. two cards, DTC3181 (in non-PnP mode) at 0x240 with no IRQ +and HP C2502 at 0x300 with IRQ 7:: + + modprobe g_NCR5380 irq=0,7 base=0x240,0x300 card=3,4 + +Kevin Lentin +K.Lentin@cs.monash.edu.au |