drivers/scsi/g_NCR5380.c

/* */
This source file includes following definitions.
generic_NCR5380_detect
generic_NCR5380_info
   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 tuples.  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 overridden on the command line.
  52  */
  53  
  54 /*
  55  * $Log: generic_NCR5380.c,v $
  56  */
  57 
  58 #define AUTOPROBE_IRQ
  59 
  60 #include <asm/system.h>
  61 #include <asm/io.h>
  62 #include <linux/signal.h>
  63 #include <linux/sched.h>
  64 #include "../block/blk.h"
  65 #include "scsi.h"
  66 #include "hosts.h"
  67 #include "g_NCR5380.h"
  68 #include "NCR5380.h"
  69 #include "constants.h"
  70 
  71 static struct override {
  72     int port;
  73     int irq;
  74     int dma;
  75 } overrides 
  76 #ifdef GENERIC_NCR5380_OVERRIDE 
  77     [] = GENERIC_NCR5380_OVERRIDE
  78 #else
  79     [1] = {{0,},};
  80 #endif
  81 
  82 #define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
  83 
  84 /*
  85  * Function : generic_NCR5380_setup(char *str, int *ints)
  86  *
  87  * Purpose : LILO command line initialization of the overrides array,
  88  * 
  89  * Inputs : str - unused, ints - array of integer parameters with ints[0]
  90  *      equal to the number of ints.
  91  *
  92  */
  93 
  94 void generic_NCR5380_setup(char *str, int *ints) {
  95     static int commandline_current = 0;
  96     if (ints[0] != 2) 
  97         printk("generic_NCR5380_setup : usage ncr5380=port,irq,dma\n");
  98     else 
  99         if (commandline_current < NO_OVERRIDES) {
 100             overrides[commandline_current].port = ints[1];
 101             overrides[commandline_current].irq = ints[2];
 102             overrides[commandline_current].dma = ints[3];
 103             ++commandline_current;
 104         }
 105 }
 106 
 107 /* 
 108  * Function : int generic_NCR5380_detect(Scsi_Host_Template * tpnt)
 109  *
 110  * Purpose : initializes generic NCR5380 driver based on the 
 111  *      command line / compile time port and irq definitions.
 112  *
 113  * Inputs : tpnt - template for this SCSI adapter.
 114  * 
 115  * Returns : 1 if a host adapter was found, 0 if not.
 116  *
 117  */
 118 
 119 int generic_NCR5380_detect(Scsi_Host_Template * tpnt) {
     /*  */
 120     static int current_override = 0;
 121     int count;
 122     struct Scsi_Host *instance;
 123 
 124     for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
 125         if (!(overrides[current_override].port))
 126             continue;
 127 
 128         instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
 129         instance->io_port = overrides[current_override].port;
 130 
 131         NCR5380_init(instance, 0);
 132 
 133         if (overrides[current_override].irq != IRQ_AUTO)
 134             instance->irq = overrides[current_override].irq;
 135         else 
 136             instance->irq = NCR5380_probe_irq(instance, 0xffff);
 137 
 138         if (instance->irq != IRQ_NONE) 
 139             if (request_irq(instance->irq, generic_NCR5380_intr, SA_INTERRUPT, "NCR5380")) {
 140                 printk("scsi%d : IRQ%d not free, interrupts disabled\n", 
 141                     instance->host_no, instance->irq);
 142                 instance->irq = IRQ_NONE;
 143             } 
 144 
 145         if (instance->irq == IRQ_NONE) {
 146             printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
 147             printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
 148         }
 149 
 150         printk("scsi%d : at port %d", instance->host_no, instance->io_port);
 151         if (instance->irq == IRQ_NONE)
 152             printk (" interrupts disabled");
 153         else 
 154             printk (" irq %d", instance->irq);
 155         printk(" options CAN_QUEUE=%d  CMD_PER_LUN=%d release=%d",
 156             CAN_QUEUE, CMD_PER_LUN, GENERIC_NCR5380_PUBLIC_RELEASE);
 157         NCR5380_print_options(instance);
 158         printk("\n");
 159 
 160         ++current_override;
 161         ++count;
 162     }
 163     return count;
 164 }
 165 
 166 const char * generic_NCR5380_info (void) {
     /*  */
 167     static const char string[]="";
 168     return string;
 169 }
 170 
 171 #include "NCR5380.c"
/* */
root/drivers/scsi/g_NCR5380.c

DEFINITIONS
