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scsi_changer.h revision 1.5 
      1 /*	$NetBSD: scsi_changer.h,v 1.5 1994/12/28 19:42:59 mycroft Exp $	*/
      2 
      3 /*
      4  * SCSI changer interface description
      5  */
      6 
      7 /*
      8  * Written by Stefan Grefen   (grefen (at) goofy.zdv.uni-mainz.de soon grefen (at) convex.com)
      9  * based on the SCSI System by written Julian Elischer (julian (at) tfs.com)
     10  * for TRW Financial Systems.
     11  *
     12  * TRW Financial Systems, in accordance with their agreement with Carnegie
     13  * Mellon University, makes this software available to CMU to distribute
     14  * or use in any manner that they see fit as long as this message is kept with
     15  * the software. For this reason TFS also grants any other persons or
     16  * organisations permission to use or modify this software.
     17  *
     18  * TFS supplies this software to be publicly redistributed
     19  * on the understanding that TFS is not responsible for the correct
     20  * functioning of this software in any circumstances.
     21  *
     22  * Ported to run under 386BSD by Julian Elischer (julian (at) tfs.com) Sept 1992
     23  */
     24 #ifndef _SCSI_SCSI_CHANGER_H
     25 #define _SCSI_SCSI_CHANGER_H 1
     26 
     27 /*
     28  * SCSI command format
     29  */
     30 struct scsi_read_element_status {
     31         u_char  opcode;
     32 	u_char	byte2;
     33 #define	SRES_ELEM_TYPE_CODE 	0x0F
     34 #define	SRES_ELEM_VOLTAG 	0x10
     35 	u_char	starting_element_addr[2];
     36 	u_char	number_of_elements[2];
     37 	u_char	resv1;
     38 	u_char	allocation_length[3];
     39 	u_char	resv2;
     40 	u_char	control;
     41 };
     42 #define RE_ALL_ELEMENTS			0
     43 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
     44 #define RE_STORAGE_ELEMENT		2
     45 #define RE_IMPORT_EXPORT		3
     46 #define RE_DATA_TRANSFER_ELEMENT	4
     47 
     48 struct scsi_move_medium {
     49 	u_char  opcode;
     50 	u_char	byte2;
     51 	u_char  transport_element_address[2];
     52 	u_char  source_address[2];
     53 	u_char  destination_address[2];
     54 	u_char  rsvd[2];
     55 	u_char  invert;
     56 	u_char	control;
     57 };
     58 
     59 struct scsi_position_to_element {
     60 	u_char  opcode;
     61         u_char  byte2;
     62 	u_char  transport_element_address[2];
     63 	u_char  source_address[2];
     64 	u_char  rsvd[2];
     65 	u_char  invert;
     66 	u_char	control;
     67 };
     68 
     69 /*
     70  * Opcodes
     71  */
     72 #define POSITION_TO_ELEMENT     0x2b
     73 #define MOVE_MEDIUM             0xa5
     74 #define READ_ELEMENT_STATUS     0xb8
     75 
     76 struct scsi_element_status_data {
     77 	u_char	first_element_reported[2];
     78 	u_char	number_of_elements_reported[2];
     79 	u_char  rsvd;
     80 	u_char	byte_count_of_report[3];
     81 };
     82 
     83 struct element_status_page {
     84 	u_char	element_type_code;
     85 	u_char	flags;
     86 #define	ESP_AVOLTAG	0x40
     87 #define	ESP_PVOLTAG	0x80
     88 	u_char element_descriptor_length[2];
     89 	u_char rsvd;
     90 	u_char byte_count_of_descriptor_data[3];
     91 };
     92 
     93 #endif /* _SCSI_SCSI_CHANGER_H */
     94 
     95