1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Driver for USB Mass Storage compliant devices 4 * Debugging Functions Source Code File 5 * 6 * Current development and maintenance by: 7 * (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net) 8 * 9 * Developed with the assistance of: 10 * (c) 2002 Alan Stern <stern@rowland.org> 11 * 12 * Initial work by: 13 * (c) 1999 Michael Gee (michael@linuxspecific.com) 14 * 15 * This driver is based on the 'USB Mass Storage Class' document. This 16 * describes in detail the protocol used to communicate with such 17 * devices. Clearly, the designers had SCSI and ATAPI commands in 18 * mind when they created this document. The commands are all very 19 * similar to commands in the SCSI-II and ATAPI specifications. 20 * 21 * It is important to note that in a number of cases this class 22 * exhibits class-specific exemptions from the USB specification. 23 * Notably the usage of NAK, STALL and ACK differs from the norm, in 24 * that they are used to communicate wait, failed and OK on commands. 25 * 26 * Also, for certain devices, the interrupt endpoint is used to convey 27 * status of a command. 28 */ 29 30 #include <linux/device.h> 31 #include <linux/cdrom.h> 32 #include <linux/export.h> 33 #include <scsi/scsi.h> 34 #include <scsi/scsi_cmnd.h> 35 #include <scsi/scsi_dbg.h> 36 37 #include "usb.h" 38 #include "debug.h" 39 #include "scsi.h" 40 41 42 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb) 43 { 44 char *what = NULL; 45 46 switch (srb->cmnd[0]) { 47 case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break; 48 case REZERO_UNIT: what = "REZERO_UNIT"; break; 49 case REQUEST_SENSE: what = "REQUEST_SENSE"; break; 50 case FORMAT_UNIT: what = "FORMAT_UNIT"; break; 51 case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break; 52 case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break; 53 case READ_6: what = "READ_6"; break; 54 case WRITE_6: what = "WRITE_6"; break; 55 case SEEK_6: what = "SEEK_6"; break; 56 case READ_REVERSE: what = "READ_REVERSE"; break; 57 case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break; 58 case SPACE: what = "SPACE"; break; 59 case INQUIRY: what = "INQUIRY"; break; 60 case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break; 61 case MODE_SELECT: what = "MODE_SELECT"; break; 62 case RESERVE: what = "RESERVE"; break; 63 case RELEASE: what = "RELEASE"; break; 64 case COPY: what = "COPY"; break; 65 case ERASE: what = "ERASE"; break; 66 case MODE_SENSE: what = "MODE_SENSE"; break; 67 case START_STOP: what = "START_STOP"; break; 68 case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break; 69 case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break; 70 case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break; 71 case SET_WINDOW: what = "SET_WINDOW"; break; 72 case READ_CAPACITY: what = "READ_CAPACITY"; break; 73 case READ_10: what = "READ_10"; break; 74 case WRITE_10: what = "WRITE_10"; break; 75 case SEEK_10: what = "SEEK_10"; break; 76 case WRITE_VERIFY: what = "WRITE_VERIFY"; break; 77 case VERIFY: what = "VERIFY"; break; 78 case SEARCH_HIGH: what = "SEARCH_HIGH"; break; 79 case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break; 80 case SEARCH_LOW: what = "SEARCH_LOW"; break; 81 case SET_LIMITS: what = "SET_LIMITS"; break; 82 case READ_POSITION: what = "READ_POSITION"; break; 83 case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break; 84 case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break; 85 case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break; 86 case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break; 87 case COMPARE: what = "COMPARE"; break; 88 case COPY_VERIFY: what = "COPY_VERIFY"; break; 89 case WRITE_BUFFER: what = "WRITE_BUFFER"; break; 90 case READ_BUFFER: what = "READ_BUFFER"; break; 91 case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break; 92 case READ_LONG: what = "READ_LONG"; break; 93 case WRITE_LONG: what = "WRITE_LONG"; break; 94 case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break; 95 case WRITE_SAME: what = "WRITE_SAME"; break; 96 case GPCMD_READ_SUBCHANNEL: what = "READ SUBCHANNEL"; break; 97 case READ_TOC: what = "READ_TOC"; break; 98 case GPCMD_READ_HEADER: what = "READ HEADER"; break; 99 case GPCMD_PLAY_AUDIO_10: what = "PLAY AUDIO (10)"; break; 100 case GPCMD_PLAY_AUDIO_MSF: what = "PLAY AUDIO MSF"; break; 101 case GPCMD_GET_EVENT_STATUS_NOTIFICATION: 102 what = "GET EVENT/STATUS NOTIFICATION"; break; 103 case GPCMD_PAUSE_RESUME: what = "PAUSE/RESUME"; break; 104 case LOG_SELECT: what = "LOG_SELECT"; break; 105 case LOG_SENSE: what = "LOG_SENSE"; break; 106 case GPCMD_STOP_PLAY_SCAN: what = "STOP PLAY/SCAN"; break; 107 case GPCMD_READ_DISC_INFO: what = "READ DISC INFORMATION"; break; 108 case GPCMD_READ_TRACK_RZONE_INFO: 109 what = "READ TRACK INFORMATION"; break; 110 case GPCMD_RESERVE_RZONE_TRACK: what = "RESERVE TRACK"; break; 111 case GPCMD_SEND_OPC: what = "SEND OPC"; break; 112 case MODE_SELECT_10: what = "MODE_SELECT_10"; break; 113 case GPCMD_REPAIR_RZONE_TRACK: what = "REPAIR TRACK"; break; 114 case 0x59: what = "READ MASTER CUE"; break; 115 case MODE_SENSE_10: what = "MODE_SENSE_10"; break; 116 case GPCMD_CLOSE_TRACK: what = "CLOSE TRACK/SESSION"; break; 117 case 0x5C: what = "READ BUFFER CAPACITY"; break; 118 case 0x5D: what = "SEND CUE SHEET"; break; 119 case GPCMD_BLANK: what = "BLANK"; break; 120 case REPORT_LUNS: what = "REPORT LUNS"; break; 121 case MOVE_MEDIUM: what = "MOVE_MEDIUM or PLAY AUDIO (12)"; break; 122 case READ_12: what = "READ_12"; break; 123 case WRITE_12: what = "WRITE_12"; break; 124 case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break; 125 case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break; 126 case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break; 127 case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break; 128 case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break; 129 case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break; 130 case GPCMD_READ_CD_MSF: what = "READ CD MSF"; break; 131 case GPCMD_SCAN: what = "SCAN"; break; 132 case GPCMD_SET_SPEED: what = "SET CD SPEED"; break; 133 case GPCMD_MECHANISM_STATUS: what = "MECHANISM STATUS"; break; 134 case GPCMD_READ_CD: what = "READ CD"; break; 135 case 0xE1: what = "WRITE CONTINUE"; break; 136 case WRITE_LONG_2: what = "WRITE_LONG_2"; break; 137 default: what = "(unknown command)"; break; 138 } 139 usb_stor_dbg(us, "Command %s (%d bytes)\n", what, srb->cmd_len); 140 usb_stor_dbg(us, "bytes: %*ph\n", min_t(int, srb->cmd_len, 16), 141 (const unsigned char *)srb->cmnd); 142 } 143 144 void usb_stor_show_sense(const struct us_data *us, 145 unsigned char key, 146 unsigned char asc, 147 unsigned char ascq) 148 { 149 const char *what, *keystr, *fmt; 150 151 keystr = scsi_sense_key_string(key); 152 what = scsi_extd_sense_format(asc, ascq, &fmt); 153 154 if (keystr == NULL) 155 keystr = "(Unknown Key)"; 156 if (what == NULL) 157 what = "(unknown ASC/ASCQ)"; 158 159 if (fmt) 160 usb_stor_dbg(us, "%s: %s (%s%x)\n", keystr, what, fmt, ascq); 161 else 162 usb_stor_dbg(us, "%s: %s\n", keystr, what); 163 } 164 165 void usb_stor_dbg(const struct us_data *us, const char *fmt, ...) 166 { 167 va_list args; 168 169 va_start(args, fmt); 170 171 dev_vprintk_emit(LOGLEVEL_DEBUG, &us->pusb_dev->dev, fmt, args); 172 173 va_end(args); 174 } 175 EXPORT_SYMBOL_GPL(usb_stor_dbg); 176