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@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 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