linux/drivers/usb/storage/debug.c
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   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
  42void 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
 144void 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
 165void 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}
 175EXPORT_SYMBOL_GPL(usb_stor_dbg);
 176