Home | History | Annotate | Line # | Download | only in scsipi
scsi_changer.h revision 1.4 
      1 /*	$NetBSD: scsi_changer.h,v 1.4 1994/06/29 06:43:02 cgd 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 {
     32         u_char  op_code;
     33 	u_char	byte2;
     34 #define	SRES_ELEM_TYPE_CODE 	0x0F
     35 #define	SRES_ELEM_VOLTAG 	0x10
     36 	u_char	starting_element_addr[2];
     37 	u_char	number_of_elements[2];
     38 	u_char	resv1;
     39 	u_char	allocation_length[3];
     40 	u_char	resv2;
     41 	u_char	control;
     42 };
     43 #define RE_ALL_ELEMENTS			0
     44 #define RE_MEDIUM_TRANSPORT_ELEMENT	1
     45 #define RE_STORAGE_ELEMENT		2
     46 #define RE_IMPORT_EXPORT		3
     47 #define RE_DATA_TRANSFER_ELEMENT	4
     48 
     49 struct scsi_move_medium
     50 {
     51 	u_char  op_code;
     52 	u_char	byte2;
     53 	u_char  transport_element_address[2];
     54 	u_char  source_address[2];
     55 	u_char  destination_address[2];
     56 	u_char  rsvd[2];
     57 	u_char  invert;
     58 	u_char	control;
     59 };
     60 
     61 struct scsi_position_to_element
     62 {
     63 	u_char  op_code;
     64         u_char  byte2;
     65 	u_char  transport_element_address[2];
     66 	u_char  source_address[2];
     67 	u_char  rsvd[2];
     68 	u_char  invert;
     69 	u_char	control;
     70 };
     71 
     72 /*
     73  * Opcodes
     74  */
     75 #define POSITION_TO_ELEMENT     0x2b
     76 #define MOVE_MEDIUM             0xa5
     77 #define READ_ELEMENT_STATUS     0xb8
     78 
     79 struct scsi_element_status_data
     80 {
     81 	u_char	first_element_reported[2];
     82 	u_char	number_of_elements_reported[2];
     83 	u_char  rsvd;
     84 	u_char	byte_count_of_report[3];
     85 };
     86 
     87 struct element_status_page
     88 {
     89 	u_char	element_type_code;
     90 	u_char	flags;
     91 #define	ESP_AVOLTAG	0x40
     92 #define	ESP_PVOLTAG	0x80
     93 	u_char element_descriptor_length[2];
     94 	u_char rsvd;
     95 	u_char byte_count_of_descriptor_data[3];
     96 };
     97 #endif /*_SCSI_SCSI_CHANGER_H*/
     98 
     99