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/* $NetBSD: scsi_changer.h,v 1.5 1994/12/28 19:42:59 mycroft Exp $ */
/*
* SCSI changer interface description
*/
/*
* Written by Stefan Grefen (grefen@goofy.zdv.uni-mainz.de soon grefen@convex.com)
* based on the SCSI System by written Julian Elischer (julian@tfs.com)
* for TRW Financial Systems.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*/
#ifndef _SCSI_SCSI_CHANGER_H
#define _SCSI_SCSI_CHANGER_H 1
/*
* SCSI command format
*/
struct scsi_read_element_status {
u_char opcode;
u_char byte2;
#define SRES_ELEM_TYPE_CODE 0x0F
#define SRES_ELEM_VOLTAG 0x10
u_char starting_element_addr[2];
u_char number_of_elements[2];
u_char resv1;
u_char allocation_length[3];
u_char resv2;
u_char control;
};
#define RE_ALL_ELEMENTS 0
#define RE_MEDIUM_TRANSPORT_ELEMENT 1
#define RE_STORAGE_ELEMENT 2
#define RE_IMPORT_EXPORT 3
#define RE_DATA_TRANSFER_ELEMENT 4
struct scsi_move_medium {
u_char opcode;
u_char byte2;
u_char transport_element_address[2];
u_char source_address[2];
u_char destination_address[2];
u_char rsvd[2];
u_char invert;
u_char control;
};
struct scsi_position_to_element {
u_char opcode;
u_char byte2;
u_char transport_element_address[2];
u_char source_address[2];
u_char rsvd[2];
u_char invert;
u_char control;
};
/*
* Opcodes
*/
#define POSITION_TO_ELEMENT 0x2b
#define MOVE_MEDIUM 0xa5
#define READ_ELEMENT_STATUS 0xb8
struct scsi_element_status_data {
u_char first_element_reported[2];
u_char number_of_elements_reported[2];
u_char rsvd;
u_char byte_count_of_report[3];
};
struct element_status_page {
u_char element_type_code;
u_char flags;
#define ESP_AVOLTAG 0x40
#define ESP_PVOLTAG 0x80
u_char element_descriptor_length[2];
u_char rsvd;
u_char byte_count_of_descriptor_data[3];
};
#endif /* _SCSI_SCSI_CHANGER_H */
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