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scsi_changer.h revision 1.1 
      1 /*
      2  * HISTORY
      3  *
      4  * PATCHES MAGIC                LEVEL   PATCH THAT GOT US HERE
      5  * --------------------         -----   ----------------------
      6  * CURRENT PATCH LEVEL:         1       00098
      7  * --------------------         -----   ----------------------
      8  *
      9  * 16 Feb 93	Julian Elischer		ADDED for SCSI system
     10  *
     11  */
     12 
     13 /*
     14  * SCSI changer interface description
     15  */
     16 
     17 /*
     18  * Written by Stefan Grefen   (grefen (at) goofy.zdv.uni-mainz.de soon grefen (at) convex.com)
     19  * based on the SCSI System by written Julian Elischer (julian (at) tfs.com)
     20  * for TRW Financial Systems.
     21  *
     22  * TRW Financial Systems, in accordance with their agreement with Carnegie
     23  * Mellon University, makes this software available to CMU to distribute
     24  * or use in any manner that they see fit as long as this message is kept with
     25  * the software. For this reason TFS also grants any other persons or
     26  * organisations permission to use or modify this software.
     27  *
     28  * TFS supplies this software to be publicly redistributed
     29  * on the understanding that TFS is not responsible for the correct
     30  * functioning of this software in any circumstances.
     31  *
     32  */
     33 
     34 /*
     35  * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992
     36  */
     37 
     38 /*
     39  * SCSI command format
     40  */
     41 struct scsi_read_element_status
     42 {
     43         u_char  op_code;
     44 	u_char	element_type_code:4;
     45 	u_char  voltag:1;
     46         u_char  lun:3;
     47 	u_char	starting_element_addr[2];
     48 	u_char	number_of_elements[2];
     49 	u_char	resv1;
     50 	u_char	allocation_length[3];
     51 	u_char	resv2;
     52         u_char  link:1;
     53         u_char  flag:1;
     54         u_char  :6;
     55 };
     56 #define RE_ALL_ELEMENTS			0
     57 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
     58 #define RE_STORAGE_ELEMENT		2
     59 #define RE_IMPORT_EXPORT		3
     60 #define RE_DATA_TRANSFER_ELEMENT	4
     61 
     62 struct scsi_move_medium
     63 {
     64 	u_char  op_code;
     65 	u_char	:5;
     66 	u_char	lun:3;
     67 	u_char  transport_element_address[2];
     68 	u_char  source_address[2];
     69 	u_char  destination_address[2];
     70 	u_char  rsvd[2];
     71 	u_char  invert:1;
     72 	u_char	:7;
     73         u_char  link:1;
     74         u_char  flag:1;
     75         u_char  :6;
     76 };
     77 
     78 struct scsi_position_to_element
     79 {
     80 	u_char  op_code;
     81 	u_char	:5;
     82 	u_char	lun:3;
     83 	u_char  transport_element_address[2];
     84 	u_char  source_address[2];
     85 	u_char  rsvd[2];
     86 	u_char  invert:1;
     87 	u_char	:7;
     88         u_char  link:1;
     89         u_char  flag:1;
     90         u_char  :6;
     91 };
     92 
     93 /*
     94  * Opcodes
     95  */
     96 #define POSITION_TO_ELEMENT     0x2b
     97 #define MOVE_MEDIUM             0xa5
     98 #define READ_ELEMENT_STATUS     0xb8
     99 
    100 struct scsi_element_status_data
    101 {
    102 	u_char	first_element_reported[2];
    103 	u_char	number_of_elements_reported[2];
    104 	u_char  rsvd;
    105 	u_char	byte_count_of_report[3];
    106 };
    107 
    108 struct element_status_page
    109 {
    110 	u_char	element_type_code;
    111 	u_char	:5;
    112 	u_char avoltag:1;
    113 	u_char pvoltag:1;
    114 	u_char element_descriptor_length[2];
    115 	u_char rsvd;
    116 	u_char byte_count_of_descriptor_data[3];
    117 };
    118 
    119