99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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* SCSI changer interface description
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*/
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/*
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* Written by Stefan Grefen (grefen@goofy.zdv.uni-mainz.de soon grefen@convex.com)
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* based on the SCSI System by written Julian Elischer (julian@tfs.com)
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* for TRW Financial Systems.
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*
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* TRW Financial Systems, in accordance with their agreement with Carnegie
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* Mellon University, makes this software available to CMU to distribute
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* or use in any manner that they see fit as long as this message is kept with
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* the software. For this reason TFS also grants any other persons or
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* organisations permission to use or modify this software.
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*
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* TFS supplies this software to be publicly redistributed
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* on the understanding that TFS is not responsible for the correct
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* functioning of this software in any circumstances.
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*
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* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
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*
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* $Id: scsi_changer.h,v 1.3 1994/03/29 04:29:32 mycroft Exp $
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*/
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#ifndef _SCSI_SCSI_CHANGER_H
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#define _SCSI_SCSI_CHANGER_H 1
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/*
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* SCSI command format
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*/
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struct scsi_read_element_status
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{
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u_char op_code;
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u_char byte2;
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#define SRES_ELEM_TYPE_CODE 0x0F
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#define SRES_ELEM_VOLTAG 0x10
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u_char starting_element_addr[2];
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u_char number_of_elements[2];
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u_char resv1;
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u_char allocation_length[3];
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u_char resv2;
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u_char control;
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};
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#define RE_ALL_ELEMENTS 0
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#define RE_MEDIUM_TRANSPORT_ELEMENT 1
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#define RE_STORAGE_ELEMENT 2
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#define RE_IMPORT_EXPORT 3
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#define RE_DATA_TRANSFER_ELEMENT 4
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struct scsi_move_medium
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{
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u_char op_code;
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u_char byte2;
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u_char transport_element_address[2];
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u_char source_address[2];
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u_char destination_address[2];
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u_char rsvd[2];
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u_char invert;
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u_char control;
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};
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struct scsi_position_to_element
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{
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u_char op_code;
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u_char byte2;
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u_char transport_element_address[2];
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u_char source_address[2];
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u_char rsvd[2];
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u_char invert;
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u_char control;
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};
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/*
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* Opcodes
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*/
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#define POSITION_TO_ELEMENT 0x2b
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#define MOVE_MEDIUM 0xa5
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#define READ_ELEMENT_STATUS 0xb8
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struct scsi_element_status_data
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{
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u_char first_element_reported[2];
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u_char number_of_elements_reported[2];
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u_char rsvd;
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u_char byte_count_of_report[3];
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};
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struct element_status_page
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{
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u_char element_type_code;
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u_char flags;
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#define ESP_AVOLTAG 0x40
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#define ESP_PVOLTAG 0x80
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u_char element_descriptor_length[2];
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u_char rsvd;
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u_char byte_count_of_descriptor_data[3];
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};
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#endif /*_SCSI_SCSI_CHANGER_H*/
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