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@goofy.zdv.uni-mainz.de soon grefen@convex.com) 9 * based on the SCSI System by written Julian Elischer (julian@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@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