drivers/scsi/aha1542.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _AHA1542_H_
   3 #define _AHA1542_H_
   4
   5 #include <linux/types.h>
   6
   7 /* I/O Port interface 4.2 */
   8 /* READ */
   9 #define STATUS(base) base
  10 #define STST    BIT(7)          /* Self Test in Progress */
  11 #define DIAGF   BIT(6)          /* Internal Diagnostic Failure */
  12 #define INIT    BIT(5)          /* Mailbox Initialization Required */
  13 #define IDLE    BIT(4)          /* SCSI Host Adapter Idle */
  14 #define CDF     BIT(3)          /* Command/Data Out Port Full */
  15 #define DF      BIT(2)          /* Data In Port Full */
  16 /* BIT(1) is reserved */
  17 #define INVDCMD BIT(0)          /* Invalid H A Command */
  18 #define STATMASK (STST | DIAGF | INIT | IDLE | CDF | DF | INVDCMD)
  19
  20 #define INTRFLAGS(base) (STATUS(base)+2)
  21 #define ANYINTR BIT(7)          /* Any Interrupt */
  22 #define SCRD    BIT(3)          /* SCSI Reset Detected */
  23 #define HACC    BIT(2)          /* HA Command Complete */
  24 #define MBOA    BIT(1)          /* MBO Empty */
  25 #define MBIF    BIT(0)          /* MBI Full */
  26 #define INTRMASK (ANYINTR | SCRD | HACC | MBOA | MBIF)
  27
  28 /* WRITE */
  29 #define CONTROL(base) STATUS(base)
  30 #define HRST    BIT(7)          /* Hard Reset */
  31 #define SRST    BIT(6)          /* Soft Reset */
  32 #define IRST    BIT(5)          /* Interrupt Reset */
  33 #define SCRST   BIT(4)          /* SCSI Bus Reset */
  34
  35 /* READ/WRITE */
  36 #define DATA(base) (STATUS(base)+1)
  37 #define CMD_NOP         0x00    /* No Operation */
  38 #define CMD_MBINIT      0x01    /* Mailbox Initialization */
  39 #define CMD_START_SCSI  0x02    /* Start SCSI Command */
  40 #define CMD_INQUIRY     0x04    /* Adapter Inquiry */
  41 #define CMD_EMBOI       0x05    /* Enable MailBox Out Interrupt */
  42 #define CMD_BUSON_TIME  0x07    /* Set Bus-On Time */
  43 #define CMD_BUSOFF_TIME 0x08    /* Set Bus-Off Time */
  44 #define CMD_DMASPEED    0x09    /* Set AT Bus Transfer Speed */
  45 #define CMD_RETDEVS     0x0a    /* Return Installed Devices */
  46 #define CMD_RETCONF     0x0b    /* Return Configuration Data */
  47 #define CMD_RETSETUP    0x0d    /* Return Setup Data */
  48 #define CMD_ECHO        0x1f    /* ECHO Command Data */
  49
  50 #define CMD_EXTBIOS     0x28    /* Return extend bios information only 1542C */
  51 #define CMD_MBENABLE    0x29    /* Set Mailbox Interface enable only 1542C */
  52
  53 /* Mailbox Definition 5.2.1 and 5.2.2 */
  54 struct mailbox {
  55         u8 status;      /* Command/Status */
  56         u8 ccbptr[3];   /* msb, .., lsb */
  57 };
  58
  59 /* This is used with scatter-gather */
  60 struct chain {
  61         u8 datalen[3];  /* Size of this part of chain */
  62         u8 dataptr[3];  /* Location of data */
  63 };
  64
  65 /* These belong in scsi.h also */
  66 static inline void any2scsi(u8 *p, u32 v)
  67 {
  68         p[0] = v >> 16;
  69         p[1] = v >> 8;
  70         p[2] = v;
  71 }
  72
  73 #define scsi2int(up) ( (((long)*(up)) << 16) + (((long)(up)[1]) << 8) + ((long)(up)[2]) )
  74
  75 #define xscsi2int(up) ( (((long)(up)[0]) << 24) + (((long)(up)[1]) << 16) \
  76                       + (((long)(up)[2]) <<  8) +  ((long)(up)[3]) )
  77
  78 #define MAX_CDB 12
  79 #define MAX_SENSE 14
  80
  81 /* Command Control Block (CCB), 5.3 */
  82 struct ccb {
  83         u8 op;          /* Command Control Block Operation Code: */
  84                         /* 0x00: SCSI Initiator CCB, 0x01: SCSI Target CCB, */
  85                         /* 0x02: SCSI Initiator CCB with Scatter/Gather, */
  86                         /* 0x81: SCSI Bus Device Reset CCB */
  87         u8 idlun;       /* Address and Direction Control: */
  88                         /* Bits 7-5: op=0, 2: Target ID, op=1: Initiator ID */
  89                         /* Bit  4: Outbound data transfer, length is checked */
  90                         /* Bit  3:  Inbound data transfer, length is checked */
  91                         /* Bits 2-0: Logical Unit Number */
  92         u8 cdblen;      /* SCSI Command Length */
  93         u8 rsalen;      /* Request Sense Allocation Length/Disable Auto Sense */
  94         u8 datalen[3];  /* Data Length  (MSB, ..., LSB) */
  95         u8 dataptr[3];  /* Data Pointer (MSB, ..., LSB) */
  96         u8 linkptr[3];  /* Link Pointer (MSB, ..., LSB) */
  97         u8 commlinkid;  /* Command Linking Identifier */
  98         u8 hastat;      /* Host  Adapter Status (HASTAT) */
  99         u8 tarstat;     /* Target Device Status (TARSTAT) */
 100         u8 reserved[2];
 101         u8 cdb[MAX_CDB + MAX_SENSE];    /* SCSI Command Descriptor Block */
 102                                         /* followed by the Auto Sense data */
 103 };
 104
 105 #define AHA1542_REGION_SIZE 4
 106 #define AHA1542_MAILBOXES 8
 107
 108 #endif /* _AHA1542_H_ */