i386/linux/linux-0.99/drivers/scsi/g_NCR5380.c

   1 #define AUTOSENSE
   2
   3 /*
   4  * Generic Generic NCR5380 driver
   5  *
   6  * Copyright 1993, Drew Eckhardt
   7  *      Visionary Computing
   8  *      (Unix and Linux consulting and custom programming)
   9  *      drew@colorado.edu
  10  *      +1 (303) 440-4894
  11  *
  12  * ALPHA RELEASE 1.
  13  *
  14  * For more information, please consult
  15  *
  16  * NCR 5380 Family
  17  * SCSI Protocol Controller
  18  * Databook
  19  *
  20  * NCR Microelectronics
  21  * 1635 Aeroplaza Drive
  22  * Colorado Springs, CO 80916
  23  * 1+ (719) 578-3400
  24  * 1+ (800) 334-5454
  25  */
  26
  27 /*
  28  * TODO : flesh out DMA support, find some one actually using this (I have
  29  *      a memory mapped Trantor board that works fine)
  30  */
  31
  32 /*
  33  * Options :
  34  *
  35  * PARITY - enable parity checking.  Not supported.
  36  *
  37  * SCSI2 - enable support for SCSI-II tagged queueing.  Untested.
  38  *
  39  * USLEEP - enable support for devices that don't disconnect.  Untested.
  40  *
  41  * The card is detected and initialized in one of several ways :
  42  * 1.  With command line overrides - NCR5380=port,irq may be
  43  *     used on the LILO command line to override the defaults.
  44  *
  45  * 2.  With the GENERIC_NCR5380_OVERRIDE compile time define.  This is
  46  *     specified as an array of address, irq tupples.  Ie, for
  47  *     one board at the default 0xcc000 address, IRQ5, no dma, I could
  48  *     say  -DGENERIC_NCR5380_OVERRIDE={{0xcc000, 5, DMA_NONE}}
  49  *
  50  * -1 should be specified for no or DMA interrupt, -2 to autoprobe for an
  51  *      IRQ line if overriden on the command line.
  52  */
  53
  54 /*
  55  * $Log: generic_NCR5380.c,v $
  56  */
  57
  58 #include <linux/config.h>
  59 #if defined(CONFIG_SCSI_GENERIC_NCR5380)
  60 /* Standard option */
  61 #define AUTOPROBE_IRQ
  62
  63 #include <asm/system.h>
  64 #include <asm/io.h>
  65 #include <linux/signal.h>
  66 #include <linux/sched.h>
  67 #include "../block/blk.h"
  68 #include "scsi.h"
  69 #include "hosts.h"
  70 #include "g_NCR5380.h"
  71 #include "NCR5380.h"
  72 #include "constants.h"
  73
  74 static struct override {
  75     int port;
  76     int irq;
  77     int dma;
  78 } overrides
  79 #ifdef GENERIC_NCR5380_OVERRIDE
  80     [] = GENERIC_NCR5380_OVERRIDE
  81 #else
  82     [1] = {{0,},};
  83 #endif
  84
  85 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
  86
  87 /*
  88  * Function : generic_NCR5380_setup(char *str, int *ints)
  89  *
  90  * Purpose : LILO command line initialization of the overrides array,
  91  *
  92  * Inputs : str - unused, ints - array of integer paramters with ints[0]
  93  *      equal to the number of ints.
  94  *
  95  */
  96
  97 void generic_NCR5380_setup(char *str, int *ints) {
  98     static int commandline_current = 0;
  99     if (ints[0] != 2)
 100         printk("generic_NCR5380_setup : usage ncr5380=port,irq,dma\n");
 101     else
 102         if (commandline_current < NO_OVERRIDES) {
 103             overrides[commandline_current].port = ints[1];
 104             overrides[commandline_current].irq = ints[2];
 105             overrides[commandline_current].dma = ints[3];
 106             ++commandline_current;
 107         }
 108 }
 109
 110 static struct sigaction sa =  { generic_NCR5380_intr, 0,
 111     SA_INTERRUPT , NULL };
 112
 113 /*
 114  * Function : int generic_NCR5380_detect(int hostno)
 115  *
 116  * Purpose : initializes generic NCR5380 driver based on the
 117  *      command line / compile time port and irq definitions.
 118  *
 119  * Inputs : hostno - id of this SCSI adapter.
 120  *
 121  * Returns : 1 if a host adapter was found, 0 if not.
 122  *
 123  */
 124
 125 int generic_NCR5380_detect(int hostno) {
 126     static int current_override = 0;
 127     int count;
 128     struct Scsi_Host *instance;
 129
 130     for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 131         if (!(overrides[current_override].port))
 132             continue;
 133
 134         instance = scsi_register (hostno, sizeof(struct NCR5380_hostdata));
 135         instance->io_port = overrides[current_override].port;
 136
 137         NCR5380_init(instance);
 138
 139         if (overrides[current_override].irq != IRQ_AUTO)
 140             instance->irq = overrides[current_override].irq;
 141         else
 142             instance->irq = NCR5380_probe_irq(instance, 0xffff);
 143
 144         if (instance->irq != IRQ_NONE)
 145             if (irqaction (instance->irq, &sa)) {
 146                 printk("scsi%d : IRQ%d not free, interrupts disabled\n",
 147                     hostno, instance->irq);
 148                 instance->irq = IRQ_NONE;
 149             }
 150
 151         if (instance->irq == IRQ_NONE) {
 152             printk("scsi%d : interrupts not enabled. for better interactive performance,\n", hostno);
 153             printk("scsi%d : please jumper the board for a free IRQ.\n", hostno);
 154         }
 155
 156         printk("scsi%d : at port %d", instance->host_no, instance->io_port);
 157         if (instance->irq == IRQ_NONE)
 158             printk (" interrupts disabled");
 159         else
 160             printk (" irq %d", instance->irq);
 161         printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
 162             CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
 163         NCR5380_print_options(instance);
 164         printk("\n");
 165
 166         ++current_override;
 167         ++count;
 168     }
 169     return count;
 170 }
 171
 172 const char * generic_NCR5380_info (void) {
 173     static const char string[]="";
 174     return string;
 175 }
 176
 177 #include "NCR5380.c"
 178
 179 #endif /* defined(CONFIG_SCSI_GENERIC_NCR5380) */