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

#define REWIND_DLEN 6
 
#ifdef	MRI
typedef packed struct
#endif
#ifdef	GHS
#pragma pack(1)
typedef struct
#endif
#if _SDS
#pragma maxalign(1)
typedef struct
#endif
    {
    unsigned char       code;
    unsigned char       lun     :3,
                                :4,
                        immed   :1;
    unsigned char       reserved[3];
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } REWIND_STRUCT;
#ifdef	GHS
#pragma pack()
#endif
#if _SDS
#pragma maxalign()
#endif

/***********************************************************************/
/* Unload                                                              */
/***********************************************************************/
#define UNLOAD 0x1B
#define UNLOAD_DLEN 6
 
#ifdef	MRI
typedef packed struct
#endif
#ifdef	GHS
#pragma pack(1)
typedef struct
#endif
#if _SDS
#pragma maxalign(1)
typedef struct
#endif
    {
    unsigned char       code;
    unsigned char       lun     :3,
                                :4,
                        immed   :1;
    unsigned char       reserved[2];
    unsigned char               :5,
                             eot:1,
                           reten:1,
                            load:1;   
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } UNLOAD_STRUCT;
#ifdef	GHS
#pragma pack()
#endif
#if _SDS
#pragma maxalign()
#endif


/***********************************************************************/
/* Erase                                                               */
/***********************************************************************/
#define ERASE 0x19
#define ERASE_DLEN 6
 
typedef struct
    {
    unsigned char       code;
    unsigned char       lun     :3,
                                :3,
                        immed   :1,
                        elong   :1;
    unsigned char       reserved[3];
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } ERASE_STRUCT;

/***********************************************************************/
/* SPACE                                                               */
/***********************************************************************/
#define SPACE 0x11
#define SPACE_DLEN 6

#ifdef	MRI
typedef packed struct
#endif
#ifdef	GHS
#pragma pack(1)
typedef struct
#endif
#if _SDS
#pragma maxalign(1)
typedef struct
#endif
    {
    unsigned char       code;
    unsigned long       lun     :3,
                                :2,
                        space   :3,
                        count   :24;
    unsigned char       vu      :2,
                                :4,
                        flag    :1,
                        link    :1;
    } SPACE_STRUCT;
#ifdef	GHS
#pragma pack()
#endif
#if _SDS
#pragma maxalign()
#endif



/***********************************************************************/
/* Message codes.                                                      */
/***********************************************************************/

#define MSG_COMPLETE     0x00
#define MSG_EXTENDED     0x01
#define MSG_SAVE_DPTR    0x02
#define MSG_RESTORE_PTRS 0x03
#define MSG_DISCONNECT   0x04
#define MSG_ERROR        0x05
#define MSG_ABORT        0x06
#define MSG_REJECT       0x07
#define MSG_NOP          0x08
#define MSG_PARITY       0x09
#define MSG_LINK         0x0a
#define MSG_FLAG         0x0b
#define MSG_RESET        0x0c
#define MSG_SQTAG        0x20
#define MSG_IDENTIFY     0x80
#define MSG_IDENTIFY_D   0xC0        /* IDENTIFY + allow disconnect    */

/***********************************************************************/
/* Extended message codes.                                             */
/***********************************************************************/

#define EMSG_MODIFY  0x00            /* Modify data pointer            */
#define EMSG_SYNCH   0x01            /* Syncronous data transfer req   */
#define EMSG_IDENT   0x02            /* Extended idenify SCSI 1        */
#define EMSG_WDTR    0x03            /* Wide Data Transfer req         */

/***********************************************************************/
/* extended message offset values                                      */
/***********************************************************************/
#define EOFF_XMSG       0x00         /* "extended message" message     */
#define EOFF_LENGTH     0x01         /* # of bytes remaining in msg    */
#define EOFF_CODE       0x02         /* extended message code i.e. SDTR*/
#define EOFF_WIDTH      0x03         /* WDTR transfer width            */
#define EOFF_PERIOD     0x03         /* SDTR transfer period           */
#define EOFF_OFFSET     0x04         /* SDTR req/ack offset            */

/***********************************************************************/
/* Sense Key codes.                                                    */
/***********************************************************************/
#define NO_SENSE         0x00
#define RECOVERED_ERROR  0x01
#define NOT_READY        0x02
#define MEDIUM_ERROR     0x03
#define HARDWARE_ERROR   0x04
#define ILLEGAL_REQUEST  0x05
#define UNIT_ATTENTION   0x06
#define DATA_PROTECT     0x07
#define BLANK_CHECK      0x08
#define VENDOR_CODE      0x09
#define COPY_ABORTED     0x0A
#define ABORTED_COMMAND  0x0B
#define EQUAL            0x0C
#define VOLUME_OVERFLOW  0x0D
#define MISCOMPARE       0x0E
/***********************************************************************/
/* Device interface structure                                          */
/***********************************************************************/
#define STATLEN 4                   /* allow 4 bytes of status         */
#define MAXMSG 8                    /* max size of a message           */
#define capacity sizes.cap
#define limits   sizes.lim

typedef struct
    {
    volatile unsigned int flags;    /* status flags                    */
    volatile unsigned int state;    /* state of target                 */
    unsigned char open;             /* count of number of users.       */
    unsigned char loaded;           /* medium is loaded flag.          */
    unsigned char rewind;           /* opened with rewind.             */
    unsigned char exclusive;        /* opened exclusively for 1 user.  */
    unsigned long st_access_id;     /* command access semaphore ID     */
    unsigned long st_cont_id;       /* command continue semaphore ID   */
    unsigned char id;               /* device ID                       */
    unsigned char lun;              /* logical unit number             */
    unsigned char bus_width;        /* SCSI bus width                  */
    unsigned char resev0;           /* reserved  (make long alignment) */
    unsigned long block_size;       /* Tape block size                 */
    char *trans_blk;                /* pointer to transaction block    */
    union
        {
        CAPACITY_RET_STRUCT cap;    /* capacity of disk drive          */
        BLOCK_LIMITS_RET_STRUCT lim;/* limits of tape device           */
        } sizes;
    INQUIRY_RET_STRUCT  inquiry;    /* inquiry information             */
    REQUEST_SENSE_RET_STRUCT sense; /* sense info valid on error only  */
    PARTITION_INFO partition[4];    /* MSDOS partition info.           */
    } TARGET_DEV;

/*---------------------------------------------------------------------*/
/* TARGET_DEV flag bits                                                */
/*---------------------------------------------------------------------*/
#define ABORT_OPERATION 0x000001    /* Operation to be aborted         */
#define RESET_DEVICE    0x000002    /* Device to be reset              */
#define WIDE_SUPPORT    0x000004    /* Device supports wide xfers      */
#define WIDE_INITIATE   0x000008    /* Tells low level to request wide */
#define WIDE_DISABLE    0x000010    /* Low level disable WIDE because  */
                                    /* of PARITY error.                */
#define SYNC_REJECT     0x000020    /* Target rejected sync request    */
#define WIDE_REJECT     0x000040    /* Target rejected wide request    */
#define DISC_SUPPORT    0x000100    /* Device disconnect support       */
#define SYNC_SUPPORT    0x000200    /* Device supports sync xfers      */
#define SYNC_INITIATE   0x000400    /* Tells low level to request sync */
#define IDENT_SUPPORT   0x000800    /* Identify msg supported          */
#define ERROR           0x001000    /* Device Error occured            */
#define DISCONNECT      0x002000    /* Device disconnect received      */
#define WRITE_PROTECT   0x004000    /* Device is write protected       */
#define TAPE_BLOCK_MODE 0x008000    /* Mode for tape transfer          */
#define IN_USE          0x010000    /* Command block is in use         */
#define INQUIRED        0x020000    /* Inquiry completed               */
#define CAPACITY        0x040000    /* Capacity completed              */
#define LIMITS          0x040000    /* Limits completed                */
#define CONTROLLER      0x080000    /* SCSI bus controller             */
#define REQSENSE        0x100000    /* Request Sense being performed   */
#define NO_DEVICE       0x200000    /* No device at this target        */
#define PARTITIONED     0x400000    /* DOS partitioning flag           */
#define GETDEVINFO      0x800000    /* getdevinfo being performed      */

/*---------------------------------------------------------------------*/
/* TARGET_DEV state bits                                               */
/*---------------------------------------------------------------------*/
/* NOTE lower byte, bits 0 - 7 are  reserved for initurrpt bits.       */
/* example: target_dev->state |= CMD_COMPLETE;                         */
/*---------------------------------------------------------------------*/
#define DMA_TRANSFER    0x00000100  /* dma transfer in progress        */
#define PGM_TRANSFER    0x00000200  /* program transfer in progress    */
#define PHASE_CHG       0x00000400  /* phase change during transfer    */
#define DISCONNECTED    0x00000800  /* target disconnected from bus    */
#define RESTART         0x00001000  /* target disconnected from bus    */

#define DISCONNECT_MSG  0x00010000  /* disconnect message received     */
#define SAVE_DPTR_MSG   0x00020000  /* save data pointer message       */
#define RESTORE_PTR_MSG 0x00040000  /* restore data pointer message    */
#define REJECT_MSG      0x00080000  /* reject last message received    */
#define LINK_MSG        0x00100000  /* linked command complete         */
#define FLAG_MSG        0x00200000  /* linked command complete flag    */
#define IDENTIFY_MSG    0x00400000  /* establish nexus                 */

#define CLEAR_MESSAGE_FLAGS 0xFF0000 /* &= ~ will clear message flags  */

#endif /* _SCSI_H */

#if defined(__cplusplus)
}
#endif