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
40
41void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
42{
43 char *what = NULL;
44
45 switch (srb->cmnd[0]) {
46 case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
47 case REZERO_UNIT: what = "REZERO_UNIT"; break;
48 case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
49 case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
50 case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
51 case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
52 case READ_6: what = "READ_6"; break;
53 case WRITE_6: what = "WRITE_6"; break;
54 case SEEK_6: what = "SEEK_6"; break;
55 case READ_REVERSE: what = "READ_REVERSE"; break;
56 case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
57 case SPACE: what = "SPACE"; break;
58 case INQUIRY: what = "INQUIRY"; break;
59 case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
60 case MODE_SELECT: what = "MODE_SELECT"; break;
61 case RESERVE_6: what = "RESERVE"; break;
62 case RELEASE_6: what = "RELEASE"; break;
63 case COPY: what = "COPY"; break;
64 case ERASE: what = "ERASE"; break;
65 case MODE_SENSE: what = "MODE_SENSE"; break;
66 case START_STOP: what = "START_STOP"; break;
67 case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
68 case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
69 case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
70 case SET_WINDOW: what = "SET_WINDOW"; break;
71 case READ_CAPACITY: what = "READ_CAPACITY"; break;
72 case READ_10: what = "READ_10"; break;
73 case WRITE_10: what = "WRITE_10"; break;
74 case SEEK_10: what = "SEEK_10"; break;
75 case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
76 case VERIFY: what = "VERIFY"; break;
77 case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
78 case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
79 case SEARCH_LOW: what = "SEARCH_LOW"; break;
80 case SET_LIMITS: what = "SET_LIMITS"; break;
81 case READ_POSITION: what = "READ_POSITION"; break;
82 case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
83 case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
84 case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
85 case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
86 case COMPARE: what = "COMPARE"; break;
87 case COPY_VERIFY: what = "COPY_VERIFY"; break;
88 case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
89 case READ_BUFFER: what = "READ_BUFFER"; break;
90 case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
91 case READ_LONG: what = "READ_LONG"; break;
92 case WRITE_LONG: what = "WRITE_LONG"; break;
93 case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
94 case WRITE_SAME: what = "WRITE_SAME"; break;
95 case GPCMD_READ_SUBCHANNEL: what = "READ SUBCHANNEL"; break;
96 case READ_TOC: what = "READ_TOC"; break;
97 case GPCMD_READ_HEADER: what = "READ HEADER"; break;
98 case GPCMD_PLAY_AUDIO_10: what = "PLAY AUDIO (10)"; break;
99 case GPCMD_PLAY_AUDIO_MSF: what = "PLAY AUDIO MSF"; break;
100 case GPCMD_GET_EVENT_STATUS_NOTIFICATION:
101 what = "GET EVENT/STATUS NOTIFICATION"; break;
102 case GPCMD_PAUSE_RESUME: what = "PAUSE/RESUME"; break;
103 case LOG_SELECT: what = "LOG_SELECT"; break;
104 case LOG_SENSE: what = "LOG_SENSE"; break;
105 case GPCMD_STOP_PLAY_SCAN: what = "STOP PLAY/SCAN"; break;
106 case GPCMD_READ_DISC_INFO: what = "READ DISC INFORMATION"; break;
107 case GPCMD_READ_TRACK_RZONE_INFO:
108 what = "READ TRACK INFORMATION"; break;
109 case GPCMD_RESERVE_RZONE_TRACK: what = "RESERVE TRACK"; break;
110 case GPCMD_SEND_OPC: what = "SEND OPC"; break;
111 case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
112 case GPCMD_REPAIR_RZONE_TRACK: what = "REPAIR TRACK"; break;
113 case 0x59: what = "READ MASTER CUE"; break;
114 case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
115 case GPCMD_CLOSE_TRACK: what = "CLOSE TRACK/SESSION"; break;
116 case 0x5C: what = "READ BUFFER CAPACITY"; break;
117 case 0x5D: what = "SEND CUE SHEET"; break;
118 case GPCMD_BLANK: what = "BLANK"; break;
119 case REPORT_LUNS: what = "REPORT LUNS"; break;
120 case MOVE_MEDIUM: what = "MOVE_MEDIUM or PLAY AUDIO (12)"; break;
121 case READ_12: what = "READ_12"; break;
122 case WRITE_12: what = "WRITE_12"; break;
123 case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
124 case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
125 case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
126 case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
127 case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
128 case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
129 case GPCMD_READ_CD_MSF: what = "READ CD MSF"; break;
130 case GPCMD_SCAN: what = "SCAN"; break;
131 case GPCMD_SET_SPEED: what = "SET CD SPEED"; break;
132 case GPCMD_MECHANISM_STATUS: what = "MECHANISM STATUS"; break;
133 case GPCMD_READ_CD: what = "READ CD"; break;
134 case 0xE1: what = "WRITE CONTINUE"; break;
135 case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
136 default: what = "(unknown command)"; break;
137 }
138 usb_stor_dbg(us, fmt: "Command %s (%d bytes)\n", what, srb->cmd_len);
139 usb_stor_dbg(us, fmt: "bytes: %*ph\n", min_t(int, srb->cmd_len, 16),
140 (const unsigned char *)srb->cmnd);
141}
142
143void usb_stor_show_sense(const struct us_data *us,
144 unsigned char key,
145 unsigned char asc,
146 unsigned char ascq)
147{
148 const char *what, *keystr, *fmt;
149
150 keystr = scsi_sense_key_string(key);
151 what = scsi_extd_sense_format(asc, ascq, &fmt);
152
153 if (keystr == NULL)
154 keystr = "(Unknown Key)";
155 if (what == NULL)
156 what = "(unknown ASC/ASCQ)";
157
158 if (fmt)
159 usb_stor_dbg(us, fmt: "%s: %s (%s%x)\n", keystr, what, fmt, ascq);
160 else
161 usb_stor_dbg(us, fmt: "%s: %s\n", keystr, what);
162}
163
164void usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
165{
166 va_list args;
167
168 va_start(args, fmt);
169
170 dev_vprintk_emit(LOGLEVEL_DEBUG, dev: &us->pusb_dev->dev, fmt, args);
171
172 va_end(args);
173}
174EXPORT_SYMBOL_GPL(usb_stor_dbg);
175

source code of linux/drivers/usb/storage/debug.c