alistair23-linux/drivers/usb/storage/debug.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for USB Mass Storage compliant devices
 * Debugging Functions Source Code File
 *
 * Current development and maintenance by:
 *   (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
 *
 * Developed with the assistance of:
 *   (c) 2002 Alan Stern <stern@rowland.org>
 *
 * Initial work by:
 *   (c) 1999 Michael Gee (michael@linuxspecific.com)
 *
 * This driver is based on the 'USB Mass Storage Class' document. This
 * describes in detail the protocol used to communicate with such
 * devices.  Clearly, the designers had SCSI and ATAPI commands in
 * mind when they created this document.  The commands are all very
 * similar to commands in the SCSI-II and ATAPI specifications.
 *
 * It is important to note that in a number of cases this class
 * exhibits class-specific exemptions from the USB specification.
 * Notably the usage of NAK, STALL and ACK differs from the norm, in
 * that they are used to communicate wait, failed and OK on commands.
 *
 * Also, for certain devices, the interrupt endpoint is used to convey
 * status of a command.
 */

#include <linux/device.h>
#include <linux/cdrom.h>
#include <linux/export.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_dbg.h>

#include "usb.h"
#include "debug.h"
#include "scsi.h"


void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
{
	char *what = NULL;

	switch (srb->cmnd[0]) {
	case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
	case REZERO_UNIT: what = "REZERO_UNIT"; break;
	case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
	case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
	case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
	case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
	case READ_6: what = "READ_6"; break;
	case WRITE_6: what = "WRITE_6"; break;
	case SEEK_6: what = "SEEK_6"; break;
	case READ_REVERSE: what = "READ_REVERSE"; break;
	case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
	case SPACE: what = "SPACE"; break;
	case INQUIRY: what = "INQUIRY"; break;
	case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
	case MODE_SELECT: what = "MODE_SELECT"; break;
	case RESERVE: what = "RESERVE"; break;
	case RELEASE: what = "RELEASE"; break;
	case COPY: what = "COPY"; break;
	case ERASE: what = "ERASE"; break;
	case MODE_SENSE: what = "MODE_SENSE"; break;
	case START_STOP: what = "START_STOP"; break;
	case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
	case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
	case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
	case SET_WINDOW: what = "SET_WINDOW"; break;
	case READ_CAPACITY: what = "READ_CAPACITY"; break;
	case READ_10: what = "READ_10"; break;
	case WRITE_10: what = "WRITE_10"; break;
	case SEEK_10: what = "SEEK_10"; break;
	case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
	case VERIFY: what = "VERIFY"; break;
	case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
	case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
	case SEARCH_LOW: what = "SEARCH_LOW"; break;
	case SET_LIMITS: what = "SET_LIMITS"; break;
	case READ_POSITION: what = "READ_POSITION"; break;
	case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
	case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
	case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
	case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
	case COMPARE: what = "COMPARE"; break;
	case COPY_VERIFY: what = "COPY_VERIFY"; break;
	case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
	case READ_BUFFER: what = "READ_BUFFER"; break;
	case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
	case READ_LONG: what = "READ_LONG"; break;
	case WRITE_LONG: what = "WRITE_LONG"; break;
	case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
	case WRITE_SAME: what = "WRITE_SAME"; break;
	case GPCMD_READ_SUBCHANNEL: what = "READ SUBCHANNEL"; break;
	case READ_TOC: what = "READ_TOC"; break;
	case GPCMD_READ_HEADER: what = "READ HEADER"; break;
	case GPCMD_PLAY_AUDIO_10: what = "PLAY AUDIO (10)"; break;
	case GPCMD_PLAY_AUDIO_MSF: what = "PLAY AUDIO MSF"; break;
	case GPCMD_GET_EVENT_STATUS_NOTIFICATION:
		what = "GET EVENT/STATUS NOTIFICATION"; break;
	case GPCMD_PAUSE_RESUME: what = "PAUSE/RESUME"; break;
	case LOG_SELECT: what = "LOG_SELECT"; break;
	case LOG_SENSE: what = "LOG_SENSE"; break;
	case GPCMD_STOP_PLAY_SCAN: what = "STOP PLAY/SCAN"; break;
	case GPCMD_READ_DISC_INFO: what = "READ DISC INFORMATION"; break;
	case GPCMD_READ_TRACK_RZONE_INFO:
		what = "READ TRACK INFORMATION"; break;
	case GPCMD_RESERVE_RZONE_TRACK: what = "RESERVE TRACK"; break;
	case GPCMD_SEND_OPC: what = "SEND OPC"; break;
	case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
	case GPCMD_REPAIR_RZONE_TRACK: what = "REPAIR TRACK"; break;
	case 0x59: what = "READ MASTER CUE"; break;
	case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
	case GPCMD_CLOSE_TRACK: what = "CLOSE TRACK/SESSION"; break;
	case 0x5C: what = "READ BUFFER CAPACITY"; break;
	case 0x5D: what = "SEND CUE SHEET"; break;
	case GPCMD_BLANK: what = "BLANK"; break;
	case REPORT_LUNS: what = "REPORT LUNS"; break;
	case MOVE_MEDIUM: what = "MOVE_MEDIUM or PLAY AUDIO (12)"; break;
	case READ_12: what = "READ_12"; break;
	case WRITE_12: what = "WRITE_12"; break;
	case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
	case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
	case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
	case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
	case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
	case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
	case GPCMD_READ_CD_MSF: what = "READ CD MSF"; break;
	case GPCMD_SCAN: what = "SCAN"; break;
	case GPCMD_SET_SPEED: what = "SET CD SPEED"; break;
	case GPCMD_MECHANISM_STATUS: what = "MECHANISM STATUS"; break;
	case GPCMD_READ_CD: what = "READ CD"; break;
	case 0xE1: what = "WRITE CONTINUE"; break;
	case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
	default: what = "(unknown command)"; break;
	}
	usb_stor_dbg(us, "Command %s (%d bytes)\n", what, srb->cmd_len);
	usb_stor_dbg(us, "bytes: %*ph\n", min_t(int, srb->cmd_len, 16),
		     (const unsigned char *)srb->cmnd);
}

void usb_stor_show_sense(const struct us_data *us,
			 unsigned char key,
			 unsigned char asc,
			 unsigned char ascq)
{
	const char *what, *keystr, *fmt;

	keystr = scsi_sense_key_string(key);
	what = scsi_extd_sense_format(asc, ascq, &fmt);

	if (keystr == NULL)
		keystr = "(Unknown Key)";
	if (what == NULL)
		what = "(unknown ASC/ASCQ)";

	if (fmt)
		usb_stor_dbg(us, "%s: %s (%s%x)\n", keystr, what, fmt, ascq);
	else
		usb_stor_dbg(us, "%s: %s\n", keystr, what);
}

void usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
{
	va_list args;

	va_start(args, fmt);

	dev_vprintk_emit(LOGLEVEL_DEBUG, &us->pusb_dev->dev, fmt, args);

	va_end(args);
}
EXPORT_SYMBOL_GPL(usb_stor_dbg);