scsi.h

用于TM1300/PNX1300系列DSP（主要用于视频处理）的操作系统pSOS。包括全部源码

        wbus16:1,                   /* support for 16 bit wide scsi   */
        wbus32:1,                   /* support for 32 bit wide scsi   */
        reladr:1;                   /* support for relative address   */
    unsigned char vendor[8];        /* Vendor identification.          */
    unsigned char product[16];      /* Product identification          */
    unsigned char revision[4];      /* Revision level.                 */
} INQUIRY_RET_STRUCT;

#else

typedef struct
    {                               /* Common returned data header     */
    unsigned char device;           /* Device type code.               */
    unsigned char rmb:1,            /* Removeable media.               */
     qualifier:7;                   /* Device type qualifier.          */
    unsigned char isiovers:2,       /* ISO version.                    */
           ecmavers:3,              /* ECMA version.                   */
           ansivers:3;              /* ANSI version.                   */
    unsigned char :4,               /* Reserved                        */
     format:4;                      /* Response format.                */
    unsigned char length;           /* Additional Data length.         */
    unsigned char :8;               /* Reserved                        */
    unsigned char :8;               /* Reserved                        */
    unsigned char reladr:1,         /* support for relative address   */
                  wbus32:1,         /* support for 32 bit wide scsi   */
                  wbus16:1,         /* support for 16 bit wide scsi   */
                  sync:1,           /* support for synchronous trans  */
                  linked:1,         /* support for linked commands    */
                  res:1,            /* reserved                       */
                  cmdque:1,         /* support for command queuing    */
                  stffre:1;         /* support for soft reset alter   */
    unsigned char vendor[8];        /* Vendor identification.          */
    unsigned char product[16];      /* Product identification          */
    unsigned char revision[4];      /* Revision level.                 */
} INQUIRY_RET_STRUCT;

#endif

/*---------------------------------------------------------------------*/
/* Device type codes.                                                  */
/*---------------------------------------------------------------------*/

#define TYPE_DIRECT      0x00       /* direct access (disk)            */
#define TYPE_SEQUENTIAL  0x01       /* sequential access (tape)        */
#define TYPE_PRINTER     0x02       /* printer                         */
#define TYPE_PROCESSOR   0x03       /* processor board                 */
#define TYPE_WORM        0x04       /* write once (optical disk)       */
#define TYPE_CDROM       0x05       /* cd rom                          */
#define TYPE_SCANNER     0x06       /* scanner                         */
#define TYPE_OMEM        0x07       /* optical memory (some disks)     */
#define TYPE_CHANGER     0x08       /* medium changer (jukeboxes)      */
#define TYPE_COMM        0x09       /* communication device            */
#define TYPE_UNKNOWN     0x1F       /* unknown device type             */
#define TYPE_HOST        0xFF       /* target id of host system        */

/***********************************************************************/
/* Format command --                                                   */
/***********************************************************************/
#define FORMAT 0x04
#define FORMAT_DLEN 0x6
typedef struct
    {
    unsigned char code:8;           /* Command number                  */
    unsigned char lun:3,            /* Logical unit number             */
           fmtdat:1,                /* Format data provided            */
            clist:1,                /* Complete list provided          */
             dfmt:3;                /* Defects provide                 */
    unsigned char  pat;             /* Pattern to write to disk        */
    unsigned char  ileave[2];       /* Interleave factor               */
    unsigned char     vu:2,         /* Vendor unique                   */
                 :4,
             flag:1,                /* Flagged command                 */
             link:1;                /* Linked command                  */
    } FORMAT_STRUCT;

/***********************************************************************/
/* Prevent/Allow Medium Removal -- Removable devices                   */
/***********************************************************************/
#define PREVENT_ALLOW_MEDIUM_REMOVAL 0x1E
#define PREVENT_ALLOW_MEDIUM_REMOVAL_DLEN 6
 
typedef struct
    {
    unsigned char       code;
    unsigned char       lun     :3,
                                :5;
    unsigned char       reserved[2];
    unsigned char               :7,
                        prevent :1;     /* 0 - allowed 1 - prevented   */
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } PREVENT_ALLOW_MEDIUM_REMOVAL_STRUCT;
 
/***********************************************************************/
/* Start/Stop Unit                                                     */
/***********************************************************************/
#define START_STOP_UNIT 0x1B
#define START_STOP_DLEN 6
typedef struct
    {
    unsigned char       code;
    unsigned char       lun     :3,
                                :4,
                       immediate:1;     /* 0 - wait for operation     */
                                        /* 1 - return w/o waiting     */
    unsigned char       reserved[2];
    unsigned char               :6,
                      load_eject:1,     /* These two form one command  */
                       start   :1;     /* 01 - Start spindle          */
                                        /* 00 - Stop  spindle          */
                                        /* 11 - Load medium            */
                                        /* 10 - Stop and eject medium  */
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } START_STOP_UNIT_STRUCT;

/***********************************************************************/
/* Mode Select command --                                              */
/***********************************************************************/
#define MODE_SELECT 0x15
#define MODE_SELECT_DLEN 0x6
typedef struct
    {
    unsigned char code;             /* Command number.                 */
    unsigned char   lun:3,          /* Logical Unit Number.            */
              pf:1,                 /* Page Format.                    */
                :3,                 /* Reserved                        */
              sp:1;                 /* Save Parameters.                */
    unsigned char res[2];           /* Reserved                        */
    unsigned char dlen;             /* Parameter List Length           */
    unsigned char    vu:2,          /* Vendor unique                   */
                :4,                 /* Reserved                        */
            flag:1,                 /* Flag command bit.               */
            link:1;                 /* Linked command bit.             */
    } MODE_SELECT_STRUCT;

/***********************************************************************/
/* Mode Sense Command -- COMMON TO MOST DEVICES                        */
/***********************************************************************/
#define MODE_SENSE 0x1A
#define MODE_SENSE_DLEN 0x06
typedef struct
    {
    unsigned char code;             /* Command number.                 */
    unsigned char   lun:3,          /* Logical Unit Number.            */
                :5;                 /* Reserved                        */
    unsigned char   pcf:2,          /* Page control field.             */
            page:6;                 /* Page code.                      */
    unsigned char      :8;
    unsigned char  dlen;            /* Bytes alloc. for data.          */
    unsigned char    vu:2,          /* Vendor unique                   */
                :4,                 /* Reserved                        */
            flag:1,                 /* Flag command bit.               */
            link:1;                 /* Linked command bit.             */
    } MODE_SENSE_STRUCT;

/*---------------------------------------------------------------------*/
/* Mode sense page control field options.                              */
/*---------------------------------------------------------------------*/

#define CURRENT    0
#define CHANGEABLE 1
#define DEFAULT    2
#define SAVED      3

/***********************************************************************/
/* Mode Sense/Select page formats                                      */
/***********************************************************************/

#ifdef	MRI
typedef packed struct
#endif
#ifdef	GHS
#pragma pack(1)
typedef struct
#endif
#if _SDS
#pragma maxalign(1)
typedef struct
#endif
    {
    unsigned char res[2];
    unsigned char RSVD:1,
         buffered_mode:3,
                 speed:4;
    unsigned char bdl;             /* Block Descriptor Length always 8*/
    unsigned char density_code;    /* 0x00 default no error checking  */
    unsigned char number_of_blocks[3]; /* not used in select */
    unsigned char res2;
    unsigned char block_length[3];    /* 0 variable or # of fixed bytes  */
    } TAPE_MODE_SELECT_HD;
#ifdef	GHS
#pragma pack()
#endif
#if _SDS
#pragma maxalign()
#endif

/*---------------------------------------------------------------------*/
/* Mode Header used for Sequential access devices (Tape Drives)        */
/*---------------------------------------------------------------------*/

/*---------------------------------------------------------------------*/
/* modeheader used for vendor specific floppy type for teac FC1        */
/*---------------------------------------------------------------------*/
struct header_descriptor
{
    unsigned char reserved0;
    unsigned char medium_type;
    unsigned char reserved1;
    unsigned char blk_descriptor_len;
    unsigned char density_code;
    unsigned char msb_blocks;        /* # of logical blocks 0x00 - all */
    unsigned char midsb_blocks;
    unsigned char lsb_blocks;
    unsigned char reservedr2;
    unsigned char msb_blklen;        /* block lenght for medium        */
    unsigned char midsb_blklen;
    unsigned char lsb_blklen;
};

/*---------------------------------------------------------------------*/
/* Read-Write Error Recovery Page                                      */
/*---------------------------------------------------------------------*/
#define RW_ERROR_RECOVERY_PC 0x01
#define RW_ERROR_RECOVERY_DLEN 12
typedef struct
    {
    unsigned char      ps:1,        /* Page saveable mode sense only   */
                  :1,               /* Reserved                        */
         page_code:6;               /* Page code (0x01)                */
    unsigned char page_length;      /* Additional page length          */
    unsigned char awre:1,           /* Auto write reallocation enable  */
          arre:1,                   /* Auto read reallocation enable   */
            tb:1,                   /* Transfer Block (on error)       */
            rc:1,                   /* Read continuous                 */
           err:1,                   /* Enable early recovery           */
           per:1,                   /* Post error (of recovered err)   */
           dte:1,                   /* disable transfer on error       */
           dcr:1;                   /* disable correction              */
    unsigned char retry_count;      /* times to retry operation        */
    unsigned char correction_span;  /* max size of correction area     */
    unsigned char head_offset;      /* head position after err rec     */
    unsigned char data_strobe_offset; /* data strobe position after err*/
    unsigned char :8;               /* Reserved                        */
    unsigned char write_retry_count;/* Max retries to write data       */
    unsigned char :8;               /* Reserved                        */
    unsigned short recovery_time;   /* milliseconds max recovery time  */
    } RW_ERROR_RECOVERY_STRUCT;

/*---------------------------------------------------------------------*/
/* Disconnect-Reconnect page                                           */
/*---------------------------------------------------------------------*/
#define DISCONNECT_RECONNECT_PC 0x02
#define DISCONNECT_RECONNECT_DLEN 16
typedef struct
    {
    unsigned char      ps:1,        /* Page saveable mode sense only   */
                  :1,               /* Reserved                        */
         page_code:6;               /* Page code (0x02)                */
    unsigned char page_length;      /* Additional page length          */
    unsigned char buf_full_ratio;   /* min in buf before reselection   */
                                    /* on read operation               */
    unsigned char buf_empty_ratio;  /* min in buf before reselection   */
                                    /* on write operation              */
    unsigned short bus_inactive_lim;/* disconnect after no activity    */
    unsigned short disconnect_time_lim;/* min time to wait to reselect */
                                    /* after disconnect                */
    unsigned short connect_time_lim;/* max time bus may be used        */
                                    /* before target must disconnect   */
    unsigned short max_burst_size;  /* max data transfered by target   */
                                    /* before target must disconnect   */
    unsigned char :6,               /* Reserved                        */