180 lines
4.6 KiB
C
180 lines
4.6 KiB
C
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#define AUTOSENSE
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/*
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* Generic Generic NCR5380 driver
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*
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* Copyright 1993, Drew Eckhardt
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* Visionary Computing
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* (Unix and Linux consulting and custom programming)
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* drew@colorado.edu
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* +1 (303) 440-4894
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*
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* ALPHA RELEASE 1.
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*
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* For more information, please consult
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*
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* NCR 5380 Family
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* SCSI Protocol Controller
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* Databook
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*
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* NCR Microelectronics
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* 1635 Aeroplaza Drive
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* Colorado Springs, CO 80916
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* 1+ (719) 578-3400
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* 1+ (800) 334-5454
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*/
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/*
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* TODO : flesh out DMA support, find some one actually using this (I have
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* a memory mapped Trantor board that works fine)
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*/
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/*
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* Options :
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*
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* PARITY - enable parity checking. Not supported.
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*
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* SCSI2 - enable support for SCSI-II tagged queueing. Untested.
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*
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* USLEEP - enable support for devices that don't disconnect. Untested.
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*
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* The card is detected and initialized in one of several ways :
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* 1. With command line overrides - NCR5380=port,irq may be
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* used on the LILO command line to override the defaults.
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*
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* 2. With the GENERIC_NCR5380_OVERRIDE compile time define. This is
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* specified as an array of address, irq tupples. Ie, for
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* one board at the default 0xcc000 address, IRQ5, no dma, I could
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* say -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE}}
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*
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* -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
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* IRQ line if overriden on the command line.
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*/
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/*
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* $Log: generic_NCR5380.c,v $
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*/
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#include <linux/config.h>
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#if defined(CONFIG_SCSI_GENERIC_NCR5380)
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/* Standard option */
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#define AUTOPROBE_IRQ
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#include <asm/system.h>
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#include <asm/io.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include "../block/blk.h"
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#include "scsi.h"
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#include "hosts.h"
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#include "g_NCR5380.h"
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#include "NCR5380.h"
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#include "constants.h"
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static struct override {
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int port;
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int irq;
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int dma;
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} overrides
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#ifdef GENERIC_NCR5380_OVERRIDE
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[] = GENERIC_NCR5380_OVERRIDE
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#else
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[1] = {{0,},};
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#endif
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#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
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/*
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* Function : generic_NCR5380_setup(char *str, int *ints)
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*
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* Purpose : LILO command line initialization of the overrides array,
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*
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* Inputs : str - unused, ints - array of integer paramters with ints[0]
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* equal to the number of ints.
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*
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*/
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void generic_NCR5380_setup(char *str, int *ints) {
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static int commandline_current = 0;
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if (ints[0] != 2)
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printk("generic_NCR5380_setup : usage ncr5380=port,irq,dma\n");
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else
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if (commandline_current < NO_OVERRIDES) {
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overrides[commandline_current].port = ints[1];
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overrides[commandline_current].irq = ints[2];
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overrides[commandline_current].dma = ints[3];
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++commandline_current;
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}
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}
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static struct sigaction sa = { generic_NCR5380_intr, 0,
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SA_INTERRUPT , NULL };
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/*
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* Function : int generic_NCR5380_detect(int hostno)
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*
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* Purpose : initializes generic NCR5380 driver based on the
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* command line / compile time port and irq definitions.
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*
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* Inputs : hostno - id of this SCSI adapter.
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*
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* Returns : 1 if a host adapter was found, 0 if not.
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*
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*/
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int generic_NCR5380_detect(int hostno) {
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static int current_override = 0;
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int count;
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struct Scsi_Host *instance;
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for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
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if (!(overrides[current_override].port))
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continue;
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instance = scsi_register (hostno, sizeof(struct NCR5380_hostdata));
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instance->io_port = overrides[current_override].port;
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NCR5380_init(instance);
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if (overrides[current_override].irq != IRQ_AUTO)
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instance->irq = overrides[current_override].irq;
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else
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instance->irq = NCR5380_probe_irq(instance, 0xffff);
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if (instance->irq != IRQ_NONE)
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if (irqaction (instance->irq, &sa)) {
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printk("scsi%d : IRQ%d not free, interrupts disabled\n",
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hostno, instance->irq);
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instance->irq = IRQ_NONE;
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}
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if (instance->irq == IRQ_NONE) {
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printk("scsi%d : interrupts not enabled. for better interactive performance,\n", hostno);
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printk("scsi%d : please jumper the board for a free IRQ.\n", hostno);
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}
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printk("scsi%d : at port %d", instance->host_no, instance->io_port);
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if (instance->irq == IRQ_NONE)
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printk (" interrupts disabled");
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else
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printk (" irq %d", instance->irq);
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printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
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CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
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NCR5380_print_options(instance);
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printk("\n");
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++current_override;
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++count;
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}
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return count;
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}
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const char * generic_NCR5380_info (void) {
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static const char string[]="";
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return string;
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}
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#include "NCR5380.c"
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#endif /* defined(CONFIG_SCSI_GENERIC_NCR5380) */
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