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 ([email protected])
 *
 * Developed with the assistance of:
 *   (c) 2002 Alan Stern <[email protected]>
 *
 * Initial work by:
 *   (c) 1999 Michael Gee ([email protected])
 *
 * 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"


void usb_stor_show_command(const struct us_data *us, struct scsi_cmnd *srb)
{ … }

void usb_stor_show_sense(const struct us_data *us,
			 unsigned char key,
			 unsigned char asc,
			 unsigned char ascq)
{ … }

void usb_stor_dbg(const struct us_data *us, const char *fmt, ...)
{ … }
EXPORT_SYMBOL_GPL(…);