linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * IDE ATAPI floppy driver.

 *

 * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>

 * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>

 * Copyright (C) 2005       Bartlomiej Zolnierkiewicz

 *

 * This driver supports the following IDE floppy drives:

 *

 * LS-120/240 SuperDisk

 * Iomega Zip 100/250

 * Iomega PC Card Clik!/PocketZip

 *

 * For a historical changelog see

 * Documentation/ide/ChangeLog.ide-floppy.1996-2002

 */

​

#include <linux/types.h>

#include <linux/string.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/timer.h>

#include <linux/mm.h>

#include <linux/interrupt.h>

#include <linux/major.h>

#include <linux/errno.h>

#include <linux/genhd.h>

#include <linux/cdrom.h>

#include <linux/ide.h>

#include <linux/hdreg.h>

#include <linux/bitops.h>

#include <linux/mutex.h>

#include <linux/scatterlist.h>

​

#include <scsi/scsi_ioctl.h>

​

#include <asm/byteorder.h>

#include <linux/uaccess.h>

#include <linux/io.h>

#include <asm/unaligned.h>

​

#include "ide-floppy.h"

​

/*

 * After each failed packet command we issue a request sense command and retry

 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.

 */

#define IDEFLOPPY_MAX_PC_RETRIES    3

​

/* format capacities descriptor codes */

#define CAPACITY_INVALID    0x00

#define CAPACITY_UNFORMATTED    0x01

#define CAPACITY_CURRENT    0x02

#define CAPACITY_NO_CARTRIDGE   0x03

​

/*

 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit

 * was apparently being deasserted before the unit was ready to receive data.

 */

#define IDEFLOPPY_PC_DELAY  (HZ/20) /* default delay for ZIP 100 (50ms) */

​

static int ide_floppy_callback(ide_drive_t *drive, int dsc)