drivers/usb/storage/debug.c

   1 /*
   2  * Driver for USB Mass Storage compliant devices
   3  * Debugging Functions Source Code File
   4  *
   5  * Current development and maintenance by:
   6  *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
   7  *
   8  * Developed with the assistance of:
   9  *   (c) 2002 Alan Stern <stern@rowland.org>
  10  *
  11  * Initial work by:
  12  *   (c) 1999 Michael Gee (michael@linuxspecific.com)
  13  *
  14  * This driver is based on the 'USB Mass Storage Class' document. This
  15  * describes in detail the protocol used to communicate with such
  16  * devices.  Clearly, the designers had SCSI and ATAPI commands in
  17  * mind when they created this document.  The commands are all very
  18  * similar to commands in the SCSI-II and ATAPI specifications.
  19  *
  20  * It is important to note that in a number of cases this class
  21  * exhibits class-specific exemptions from the USB specification.
  22  * Notably the usage of NAK, STALL and ACK differs from the norm, in
  23  * that they are used to communicate wait, failed and OK on commands.
  24  *
  25  * Also, for certain devices, the interrupt endpoint is used to convey
  26  * status of a command.
  27  *
  28  * Please see http://www.one-eyed-alien.net/~mdharm/linux-usb for more
  29  * information about this driver.
  30  *
  31  * This program is free software; you can redistribute it and/or modify it
  32  * under the terms of the GNU General Public License as published by the
  33  * Free Software Foundation; either version 2, or (at your option) any
  34  * later version.
  35  *
  36  * This program is distributed in the hope that it will be useful, but
  37  * WITHOUT ANY WARRANTY; without even the implied warranty of
  38  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  39  * General Public License for more details.
  40  *
  41  * You should have received a copy of the GNU General Public License along
  42  * with this program; if not, write to the Free Software Foundation, Inc.,
  43  * 675 Mass Ave, Cambridge, MA 02139, USA.
  44  */
  45
  46 #include <linux/device.h>
  47 #include <linux/cdrom.h>
  48 #include <linux/export.h>
  49 #include <scsi/scsi.h>
  50 #include <scsi/scsi_cmnd.h>
  51 #include <scsi/scsi_dbg.h>
  52
  53 #include "usb.h"
  54 #include "debug.h"
  55 #include "scsi.h"
  56
  57
  58 void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
  59 {
  60         char *what = NULL;
  61
  62         switch (srb->cmnd[0]) {
  63         case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
  64         case REZERO_UNIT: what = "REZERO_UNIT"; break;
  65         case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
  66         case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
  67         case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
  68         case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
  69         case READ_6: what = "READ_6"; break;
  70         case WRITE_6: what = "WRITE_6"; break;
  71         case SEEK_6: what = "SEEK_6"; break;
  72         case READ_REVERSE: what = "READ_REVERSE"; break;
  73         case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
  74         case SPACE: what = "SPACE"; break;
  75         case INQUIRY: what = "INQUIRY"; break;
  76         case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
  77         case MODE_SELECT: what = "MODE_SELECT"; break;
  78         case RESERVE: what = "RESERVE"; break;
  79         case RELEASE: what = "RELEASE"; break;
  80         case COPY: what = "COPY"; break;
  81         case ERASE: what = "ERASE"; break;
  82         case MODE_SENSE: what = "MODE_SENSE"; break;
  83         case START_STOP: what = "START_STOP"; break;
  84         case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
  85         case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
  86         case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
  87         case SET_WINDOW: what = "SET_WINDOW"; break;
  88         case READ_CAPACITY: what = "READ_CAPACITY"; break;
  89         case READ_10: what = "READ_10"; break;
  90         case WRITE_10: what = "WRITE_10"; break;
  91         case SEEK_10: what = "SEEK_10"; break;
  92         case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
  93         case VERIFY: what = "VERIFY"; break;
  94         case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
  95         case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
  96         case SEARCH_LOW: what = "SEARCH_LOW"; break;
  97         case SET_LIMITS: what = "SET_LIMITS"; break;
  98         case READ_POSITION: what = "READ_POSITION"; break;
  99         case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
 100         case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
 101         case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
 102         case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
 103         case COMPARE: what = "COMPARE"; break;
 104         case COPY_VERIFY: what = "COPY_VERIFY"; break;
 105         case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
 106         case READ_BUFFER: what = "READ_BUFFER"; break;
 107         case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
 108         case READ_LONG: what = "READ_LONG"; break;
 109         case WRITE_LONG: what = "WRITE_LONG"; break;
 110         case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
 111         case WRITE_SAME: what = "WRITE_SAME"; break;
 112         case GPCMD_READ_SUBCHANNEL: what = "READ SUBCHANNEL"; break;
 113         case READ_TOC: what = "READ_TOC"; break;
 114         case GPCMD_READ_HEADER: what = "READ HEADER"; break;
 115         case GPCMD_PLAY_AUDIO_10: what = "PLAY AUDIO (10)"; break;
 116         case GPCMD_PLAY_AUDIO_MSF: what = "PLAY AUDIO MSF"; break;
 117         case GPCMD_GET_EVENT_STATUS_NOTIFICATION:
 118                 what = "GET EVENT/STATUS NOTIFICATION"; break;
 119         case GPCMD_PAUSE_RESUME: what = "PAUSE/RESUME"; break;
 120         case LOG_SELECT: what = "LOG_SELECT"; break;
 121         case LOG_SENSE: what = "LOG_SENSE"; break;
 122         case GPCMD_STOP_PLAY_SCAN: what = "STOP PLAY/SCAN"; break;
 123         case GPCMD_READ_DISC_INFO: what = "READ DISC INFORMATION"; break;
 124         case GPCMD_READ_TRACK_RZONE_INFO:
 125                 what = "READ TRACK INFORMATION"; break;
 126         case GPCMD_RESERVE_RZONE_TRACK: what = "RESERVE TRACK"; break;
 127         case GPCMD_SEND_OPC: what = "SEND OPC"; break;
 128         case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
 129         case GPCMD_REPAIR_RZONE_TRACK: what = "REPAIR TRACK"; break;
 130         case 0x59: what = "READ MASTER CUE"; break;
 131         case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
 132         case GPCMD_CLOSE_TRACK: what = "CLOSE TRACK/SESSION"; break;
 133         case 0x5C: what = "READ BUFFER CAPACITY"; break;
 134         case 0x5D: what = "SEND CUE SHEET"; break;
 135         case GPCMD_BLANK: what = "BLANK"; break;
 136         case REPORT_LUNS: what = "REPORT LUNS"; break;
 137         case MOVE_MEDIUM: what = "MOVE_MEDIUM or PLAY AUDIO (12)"; break;
 138         case READ_12: what = "READ_12"; break;
 139         case WRITE_12: what = "WRITE_12"; break;
 140         case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
 141         case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
 142         case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
 143         case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
 144         case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
 145         case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
 146         case GPCMD_READ_CD_MSF: what = "READ CD MSF"; break;
 147         case GPCMD_SCAN: what = "SCAN"; break;
 148         case GPCMD_SET_SPEED: what = "SET CD SPEED"; break;
 149         case GPCMD_MECHANISM_STATUS: what = "MECHANISM STATUS"; break;
 150         case GPCMD_READ_CD: what = "READ CD"; break;
 151         case 0xE1: what = "WRITE CONTINUE"; break;
 152         case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
 153         default: what = "(unknown command)"; break;
 154         }
 155         usb_stor_dbg(us, "Command %s (%d bytes)\n", what, srb->cmd_len);
 156         usb_stor_dbg(us, "bytes: %*ph\n", min_t(int, srb->cmd_len, 16),
 157                      (const unsigned char *)srb->cmnd);
 158 }
 159
 160 void usb_stor_show_sense(const struct us_data *us,
 161                          unsigned char key,
 162                          unsigned char asc,
 163                          unsigned char ascq)
 164 {
 165         const char *what, *keystr, *fmt;
 166
 167         keystr = scsi_sense_key_string(key);
 168         what = scsi_extd_sense_format(asc, ascq, &fmt);
 169
 170         if (keystr == NULL)
 171                 keystr = "(Unknown Key)";
 172         if (what == NULL)
 173                 what = "(unknown ASC/ASCQ)";
 174
 175         if (fmt)
 176                 usb_stor_dbg(us, "%s: %s (%s%x)\n", keystr, what, fmt, ascq);
 177         else
 178                 usb_stor_dbg(us, "%s: %s\n", keystr, what);
 179 }
 180
 181 void usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
 182 {
 183         va_list args;
 184
 185         va_start(args, fmt);
 186
 187         dev_vprintk_emit(LOGLEVEL_DEBUG, &us->pusb_dev->dev, fmt, args);
 188
 189         va_end(args);
 190 }
 191 EXPORT_SYMBOL_GPL(usb_stor_dbg);