kernel/blk_drv/scsi/wd7000.h

/* */
   1 #ifndef _WD7000_H
   2 
   3 /* $Id: $
   4  *
   5  * Header file for the WD-7000 driver for Linux
   6  *
   7  * $Log: $
   8  * Revision 1.1  1992/07/24  06:27:38  root
   9  * Initial revision
  10  *
  11  * Revision 1.1  1992/07/05  08:32:32  root
  12  * Initial revision
  13  *
  14  * Revision 1.1  1992/05/15  18:38:05  root
  15  * Initial revision
  16  *
  17  * Revision 1.1  1992/04/02  03:23:13  drew
  18  * Initial revision
  19  *
  20  * Revision 1.3  1992/01/27  14:46:29  tthorn
  21  * *** empty log message ***
  22  *
  23  */
  24 
  25 #include <linux/types.h>
  26 
  27 #undef STATMASK
  28 #undef CONTROL
  29 
  30 #define IO_BASE         0x350
  31 #define IRQ_LVL         15
  32 #define DMA_CH          6
  33 #define OGMB_CNT        8
  34 #define ICMB_CNT        16
  35 
  36 /* I/O Port interface 4.2 */
  37 /* READ */
  38 #define ASC_STAT IO_BASE
  39 #define INT_IM  0x80            /* Interrupt Image Flag */
  40 #define CMD_RDY 0x40            /* Command Port Ready */
  41 #define CMD_REJ 0x20            /* Command Port Byte Rejected */
  42 #define ASC_INI 0x10            /* ASC Initialized Flag */
  43 #define STATMASK 0xf0           /* The lower 4 Bytes are reserved */
  44 
  45 /* This register serves two purposes
  46  * Diagnostics error code
  47  * Interrupt Status
  48  */
  49 #define INTR_STAT ASC_STAT+1
  50 #define ANYINTR 0x80            /* Mailbox Service possible/required */
  51 #define IMB     0x40            /* 1 Incoming / 0 Outgoing */
  52 #define MBMASK 0x3f
  53 /* if MSb is zero, the lower bits are diagnostic status *
  54  * Diagnostics:
  55  * 01   No diagnostic error occurred
  56  * 02   RAM failure
  57  * 03   FIFO R/W failed
  58  * 04   SBIC register read/write failed
  59  * 05   Initialization D-FF failed
  60  * 06   Host IRQ D-FF failed
  61  * 07   ROM checksum error
  62  * Interrupt status (bitwise):
  63  * 10NNNNNN   outgoing mailbox NNNNNN is free
  64  * 11NNNNNN   incoming mailbox NNNNNN needs service
  65  */
  66 
  67 /* WRITE */
  68 #define COMMAND ASC_STAT
  69 /*
  70  *  COMMAND opcodes
  71  */
  72 #define NO_OP             0
  73 #define INITIALIZATION    1     /* initialization after reset (10 bytes) */
  74 #define DISABLE_UNS_INTR  2     /* disable unsolicited interrupts */
  75 #define ENABLE_UNS_INTR   3     /* enable unsolicited interrupts */
  76 #define INTR_ON_FREE_OGMB 4     /* interrupt on free OGMB */
  77 #define SCSI_SOFT_RESET   5     /* SCSI soft reset */
  78 #define SCSI_HARD_RESET   6     /* SCSI hard reset acknowledge */
  79 #define START_OGMB        0x80  /* start command in OGMB (n) */
  80 #define SCAN_OGMBS        0xc0  /* start multiple commands, signature (n) */
  81                                 /*    where (n) = lower 6 bits */
  82 /*
  83  *  For INITIALIZATION:
  84  */
  85 #define BUS_ON            48    /* x 125ns, 48 = 6000ns, BIOS uses 8000ns */
  86 #define BUS_OFF           24    /* x 125ns, 24 = 3000ns, BIOS uses 1875ns */
  87  
  88 #define INTR_ACK ASC_STAT+1
  89 
  90 
  91 #define CONTROL ASC_STAT+2
  92 #define INT_EN  0x08            /* Interrupt Enable     */
  93 #define DMA_EN  0x04            /* DMA Enable           */
  94 #define SCSI_RES        0x02    /* SCSI Reset           */
  95 #define ASC_RES 0x01            /* ASC Reset            */
  96 
  97 /* Mailbox Definition */
  98 
  99 struct wd_mailbox{
 100         unchar status;
 101         unchar scbptr[3];
 102 };
 103 
 104 
 105 /* These belong in scsi.h also */
 106 #undef any2scsi
 107 #define any2scsi(up, p)                 \
 108 (up)[0] = (((long)(p)) >> 16);  \
 109 (up)[1] = ((long)(p)) >> 8;             \
 110 (up)[2] = ((long)(p));
 111 
 112 #define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
 113 
 114 #define xany2scsi(up, p)        \
 115 (up)[0] = ((long)(p)) >> 24;    \
 116 (up)[1] = ((long)(p)) >> 16;    \
 117 (up)[2] = ((long)(p)) >> 8;     \
 118 (up)[3] = ((long)(p));
 119 
 120 #define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
 121                       + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
 122 
 123 #define MAX_CDB 12
 124 #define MAX_SENSE 14
 125 
 126 typedef struct scb {            /* Command Control Block 5.4.1 */
 127   unchar op;                    /* Command Control Block Operation Code */
 128   unchar idlun;                 /* op=0,2:Target Id, op=1:Initiator Id */
 129                                 /* Outbound data transfer, length is checked*/
 130                                 /* Inbound data transfer, length is checked */
 131                                 /* Logical Unit Number */
 132   unchar cdb[12];               /* SCSI Command Block */
 133   unchar status;                /* SCSI Return Status */
 134   unchar vue;                   /* Vendor Unique Error Code */
 135   unchar maxlen[3];             /* Maximum Data Transfer Length */
 136   unchar dataptr[3];            /* SCSI Data Block Pointer */
 137   unchar linkptr[3];            /* Next Command Link Pointer */
 138   unchar direc;                 /* Transfer Direction */
 139   unchar reserved2[6];          /* SCSI Command Descriptor Block */
 140                                 /* end of hardware SCB */
 141   Scsi_Cmnd *SCpnt;             /* Scsi_Cmnd using this SCB */
 142   struct scb *next;             /* for lists of scbs */
 143 } Scb;
 144 
 145 /*
 146  *  WD7000-specific scatter/gather element structure
 147  */
 148 typedef struct sgb {
 149     unchar len[3];
 150     unchar ptr[3];
 151 } Sgb;
 152 
 153 /*
 154  *  Note:  MAX_SCBS _must_ be defined large enough to keep ahead of the
 155  *  demand for SCBs, which will be at most WD7000_Q * WD7000_SG.  1 is
 156  *  added to each because they can be 0.
 157  */
 158 #define MAX_SCBS  ((WD7000_Q+1) * (WD7000_SG+1))
 159 
 160 /*
 161  *  The driver is written to allow host-only commands to be executed.  These
 162  *  use a 16-byte block called an ICB.
 163  *
 164  *  (Currently, only wd7000_info uses this, to get the firmware rev. level.)
 165  */
 166 #define ICB_STATUS  16          /* set to icmb status by wd7000_intr_handle */
 167 #define ICB_PHASE   17          /* set to 0 by wd7000_intr_handle */
 168 #define ICB_LEN     18          /* actually 16; this includes the above */
 169 
 170 int wd7000_detect(int);
 171 int wd7000_command(Scsi_Cmnd *);
 172 int wd7000_queuecommand(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
 173 int wd7000_abort(Scsi_Cmnd *, int);
 174 const char *wd7000_info(void);
 175 int wd7000_reset(void);
 176 int wd7000_biosparam(int, int, int*);
 177 
 178 #ifndef NULL
 179         #define NULL 0
 180 #endif
 181 
 182 /*
 183  *  Define WD7000_SG to be the number of Sgbs that will fit in a block of
 184  *  size WD7000_SCRIBBLE.  WD7000_SCRIBBLE must be 512, 1024, 2048, or 4096.
 185  *
 186  *  The sg_tablesize value will default to SG_NONE for older boards (before
 187  *  rev 7.0), but will be changed to WD7000_SG when a newer board is
 188  *  detected.
 189  */
 190 #define WD7000_SCRIBBLE  512
 191 
 192 #define WD7000_Q    OGMB_CNT
 193 #define WD7000_SG   (WD7000_SCRIBBLE / sizeof(Sgb))
 194 
 195 #define WD7000 {\
 196         "Western Digital WD-7000",      \
 197         wd7000_detect,                  \
 198         wd7000_info, wd7000_command,    \
 199         wd7000_queuecommand,            \
 200         wd7000_abort,                   \
 201         wd7000_reset,                   \
 202         NULL,                           \
 203         wd7000_biosparam,               \
 204         WD7000_Q, 7, SG_NONE, 1, 0, 1}
 205 #endif
/* */
root/kernel/blk_drv/scsi/wd7000.h

INCLUDED FROM
