ide-floppy.c 44.6 KB
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/*
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 * IDE ATAPI floppy driver.
 *
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 * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
 * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
 * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
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 *
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 * This driver supports the following IDE floppy drives:
 *
 * LS-120/240 SuperDisk
 * Iomega Zip 100/250
 * Iomega PC Card Clik!/PocketZip
 *
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 * For a historical changelog see
 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
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 */

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#define IDEFLOPPY_VERSION "1.00"
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#include <linux/module.h>
#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/slab.h>
#include <linux/cdrom.h>
#include <linux/ide.h>
#include <linux/bitops.h>
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#include <linux/mutex.h>
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#include <scsi/scsi_ioctl.h>

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#include <asm/byteorder.h>
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#include <linux/irq.h>
#include <linux/uaccess.h>
#include <linux/io.h>
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#include <asm/unaligned.h>

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/* define to see debug info */
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#define IDEFLOPPY_DEBUG_LOG		0

/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
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#define IDEFLOPPY_DEBUG(fmt, args...)
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#if IDEFLOPPY_DEBUG_LOG
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#define debug_log(fmt, args...) \
	printk(KERN_INFO "ide-floppy: " fmt, ## args)
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#else
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#define debug_log(fmt, args...) do {} while (0)
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#endif


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/* Some drives require a longer irq timeout. */
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#define IDEFLOPPY_WAIT_CMD		(5 * WAIT_CMD)

/*
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 * After each failed packet command we issue a request sense command and retry
 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
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 */
#define IDEFLOPPY_MAX_PC_RETRIES	3

/*
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 * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
 * bytes.
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 */
#define IDEFLOPPY_PC_BUFFER_SIZE	256

/*
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 * In various places in the driver, we need to allocate storage for packet
 * commands and requests, which will remain valid while	we leave the driver to
 * wait for an interrupt or a timeout event.
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 */
#define IDEFLOPPY_PC_STACK		(10 + IDEFLOPPY_MAX_PC_RETRIES)

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/* format capacities descriptor codes */
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#define CAPACITY_INVALID	0x00
#define CAPACITY_UNFORMATTED	0x01
#define CAPACITY_CURRENT	0x02
#define CAPACITY_NO_CARTRIDGE	0x03

/*
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 * Most of our global data which we need to save even as we leave the driver
 * due to an interrupt or a timer event is stored in a variable of type
 * idefloppy_floppy_t, defined below.
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 */
typedef struct ide_floppy_obj {
	ide_drive_t	*drive;
	ide_driver_t	*driver;
	struct gendisk	*disk;
	struct kref	kref;
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	unsigned int	openers;	/* protected by BKL for now */
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	/* Current packet command */
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	struct ide_atapi_pc *pc;
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	/* Last failed packet command */
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	struct ide_atapi_pc *failed_pc;
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	/* Packet command stack */
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	struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
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	/* Next free packet command storage space */
	int pc_stack_index;
	struct request rq_stack[IDEFLOPPY_PC_STACK];
	/* We implement a circular array */
	int rq_stack_index;

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	/* Last error information */
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	u8 sense_key, asc, ascq;
	/* delay this long before sending packet command */
	u8 ticks;
	int progress_indication;

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	/* Device information */
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	/* Current format */
	int blocks, block_size, bs_factor;
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	/* Last format capacity descriptor */
	u8 cap_desc[8];
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	/* Copy of the flexible disk page */
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	u8 flexible_disk_page[32];
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	/* Write protect */
	int wp;
	/* Supports format progress report */
	int srfp;
	/* Status/Action flags */
	unsigned long flags;
} idefloppy_floppy_t;

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#define IDEFLOPPY_TICKS_DELAY	HZ/20	/* default delay for ZIP 100 (50ms) */
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/* Floppy flag bits values. */
enum {
	/* DRQ interrupt device */
	IDEFLOPPY_FLAG_DRQ_INTERRUPT		= (1 <<	0),
	/* Media may have changed */
	IDEFLOPPY_FLAG_MEDIA_CHANGED		= (1 << 1),
	/* Format in progress */
	IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS	= (1 << 2),
	/* Avoid commands not supported in Clik drive */
	IDEFLOPPY_FLAG_CLIK_DRIVE		= (1 << 3),
	/* Requires BH algorithm for packets */
	IDEFLOPPY_FLAG_ZIP_DRIVE		= (1 << 4),
};
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/* Defines for the MODE SENSE command */
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#define MODE_SENSE_CURRENT		0x00
#define MODE_SENSE_CHANGEABLE		0x01
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#define MODE_SENSE_DEFAULT		0x02
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#define MODE_SENSE_SAVED		0x03

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/* IOCTLs used in low-level formatting. */
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#define	IDEFLOPPY_IOCTL_FORMAT_SUPPORTED	0x4600
#define	IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY	0x4601
#define	IDEFLOPPY_IOCTL_FORMAT_START		0x4602
#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS	0x4603

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/* Error code returned in rq->errors to the higher part of the driver. */
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#define	IDEFLOPPY_ERROR_GENERAL		101

/*
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 * Pages of the SELECT SENSE / MODE SENSE packet commands.
 * See SFF-8070i spec.
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 */
#define	IDEFLOPPY_CAPABILITIES_PAGE	0x1b
#define IDEFLOPPY_FLEXIBLE_DISK_PAGE	0x05

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static DEFINE_MUTEX(idefloppy_ref_mutex);
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#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)

#define ide_floppy_g(disk) \
	container_of((disk)->private_data, struct ide_floppy_obj, driver)

static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
{
	struct ide_floppy_obj *floppy = NULL;

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	mutex_lock(&idefloppy_ref_mutex);
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	floppy = ide_floppy_g(disk);
	if (floppy)
		kref_get(&floppy->kref);
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	mutex_unlock(&idefloppy_ref_mutex);
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	return floppy;
}

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static void idefloppy_cleanup_obj(struct kref *);
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static void ide_floppy_put(struct ide_floppy_obj *floppy)
{
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	mutex_lock(&idefloppy_ref_mutex);
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	kref_put(&floppy->kref, idefloppy_cleanup_obj);
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	mutex_unlock(&idefloppy_ref_mutex);
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}

/*
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 * Used to finish servicing a request. For read/write requests, we will call
 * ide_end_request to pass to the next buffer.
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 */
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static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
	struct request *rq = HWGROUP(drive)->rq;
	int error;

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	debug_log("Reached %s\n", __func__);
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	switch (uptodate) {
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	case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
	case 1: error = 0; break;
	default: error = uptodate;
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	}
	if (error)
		floppy->failed_pc = NULL;
	/* Why does this happen? */
	if (!rq)
		return 0;
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	if (!blk_special_request(rq)) {
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		/* our real local end request function */
		ide_end_request(drive, uptodate, nsecs);
		return 0;
	}
	rq->errors = error;
	/* fixme: need to move this local also */
	ide_end_drive_cmd(drive, 0, 0);
	return 0;
}

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static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
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				  unsigned int bcount, int direction)
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{
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	ide_hwif_t *hwif = drive->hwif;
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	struct request *rq = pc->rq;
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	struct req_iterator iter;
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	struct bio_vec *bvec;
	unsigned long flags;
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	int count, done = 0;
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	char *data;

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	rq_for_each_segment(bvec, rq, iter) {
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		if (!bcount)
			break;
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		count = min(bvec->bv_len, bcount);
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		data = bvec_kmap_irq(bvec, &flags);
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		if (direction)
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			hwif->output_data(drive, NULL, data, count);
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		else
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			hwif->input_data(drive, NULL, data, count);
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		bvec_kunmap_irq(data, &flags);
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		bcount -= count;
		pc->b_count += count;
		done += count;
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	}

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	idefloppy_end_request(drive, 1, done >> 9);
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	if (bcount) {
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		printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
				drive->name, __func__, bcount);
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		ide_pad_transfer(drive, direction, bcount);
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	}
}

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static void idefloppy_update_buffers(ide_drive_t *drive,
				struct ide_atapi_pc *pc)
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{
	struct request *rq = pc->rq;
	struct bio *bio = rq->bio;

	while ((bio = rq->bio) != NULL)
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		idefloppy_end_request(drive, 1, 0);
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}

/*
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 * Generate a new packet command request in front of the request queue, before
 * the current request so that it will be processed immediately, on the next
 * pass through the driver.
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 */
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static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
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		struct request *rq)
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{
	struct ide_floppy_obj *floppy = drive->driver_data;

	ide_init_drive_cmd(rq);
	rq->buffer = (char *) pc;
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	rq->cmd_type = REQ_TYPE_SPECIAL;
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	rq->cmd_flags |= REQ_PREEMPT;
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	rq->rq_disk = floppy->disk;
	(void) ide_do_drive_cmd(drive, rq, ide_preempt);
}

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static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;

	if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
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		floppy->pc_stack_index = 0;
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	return (&floppy->pc_stack[floppy->pc_stack_index++]);
}

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static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;

	if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
		floppy->rq_stack_index = 0;
	return (&floppy->rq_stack[floppy->rq_stack_index++]);
}

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static void idefloppy_request_sense_callback(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
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	u8 *buf = floppy->pc->buf;
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	debug_log("Reached %s\n", __func__);

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	if (!floppy->pc->error) {
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		floppy->sense_key = buf[2] & 0x0F;
		floppy->asc = buf[12];
		floppy->ascq = buf[13];
		floppy->progress_indication = buf[15] & 0x80 ?
			(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;

		if (floppy->failed_pc)
			debug_log("pc = %x, sense key = %x, asc = %x,"
					" ascq = %x\n",
					floppy->failed_pc->c[0],
					floppy->sense_key,
					floppy->asc,
					floppy->ascq);
		else
			debug_log("sense key = %x, asc = %x, ascq = %x\n",
					floppy->sense_key,
					floppy->asc,
					floppy->ascq);


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		idefloppy_end_request(drive, 1, 0);
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	} else {
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		printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
				" request!\n");
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		idefloppy_end_request(drive, 0, 0);
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	}
}

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/* General packet command callback function. */
static void idefloppy_pc_callback(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
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	debug_log("Reached %s\n", __func__);
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	idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0);
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}

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static void idefloppy_init_pc(struct ide_atapi_pc *pc)
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{
	memset(pc->c, 0, 12);
	pc->retries = 0;
	pc->flags = 0;
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	pc->req_xfer = 0;
	pc->buf = pc->pc_buf;
	pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
	pc->idefloppy_callback = &idefloppy_pc_callback;
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}

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static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
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{
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	idefloppy_init_pc(pc);
	pc->c[0] = GPCMD_REQUEST_SENSE;
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	pc->c[4] = 255;
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	pc->req_xfer = 18;
	pc->idefloppy_callback = &idefloppy_request_sense_callback;
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}

/*
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 * Called when an error was detected during the last packet command. We queue a
 * request sense packet command in the head of the request list.
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 */
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static void idefloppy_retry_pc(ide_drive_t *drive)
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{
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	struct ide_atapi_pc *pc;
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	struct request *rq;

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	(void)ide_read_error(drive);
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	pc = idefloppy_next_pc_storage(drive);
	rq = idefloppy_next_rq_storage(drive);
	idefloppy_create_request_sense_cmd(pc);
	idefloppy_queue_pc_head(drive, pc, rq);
}

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/* The usual interrupt handler called during a packet command. */
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static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
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	ide_hwif_t *hwif = drive->hwif;
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	struct ide_atapi_pc *pc = floppy->pc;
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	struct request *rq = pc->rq;
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	xfer_func_t *xferfunc;
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	unsigned int temp;
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	int dma_error = 0;
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	u16 bcount;
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	u8 stat, ireason;
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	debug_log("Reached %s interrupt handler\n", __func__);
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	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
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		dma_error = hwif->dma_ops->dma_end(drive);
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		if (dma_error) {
			printk(KERN_ERR "%s: DMA %s error\n", drive->name,
					rq_data_dir(rq) ? "write" : "read");
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			pc->flags |= PC_FLAG_DMA_ERROR;
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		} else {
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			pc->xferred = pc->req_xfer;
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			idefloppy_update_buffers(drive, pc);
		}
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		debug_log("DMA finished\n");
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	}

	/* Clear the interrupt */
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	stat = ide_read_status(drive);
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	/* No more interrupts */
	if ((stat & DRQ_STAT) == 0) {
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		debug_log("Packet command completed, %d bytes transferred\n",
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				pc->xferred);
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		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
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		local_irq_enable_in_hardirq();
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		if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
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			/* Error detected */
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			debug_log("%s: I/O error\n", drive->name);
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			rq->errors++;
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			if (pc->c[0] == GPCMD_REQUEST_SENSE) {
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				printk(KERN_ERR "ide-floppy: I/O error in "
					"request sense command\n");
				return ide_do_reset(drive);
			}
			/* Retry operation */
			idefloppy_retry_pc(drive);
			/* queued, but not started */
			return ide_stopped;
		}
		pc->error = 0;
		if (floppy->failed_pc == pc)
			floppy->failed_pc = NULL;
		/* Command finished - Call the callback function */
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		pc->idefloppy_callback(drive);
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		return ide_stopped;
	}

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	if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
		pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
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		printk(KERN_ERR "ide-floppy: The floppy wants to issue "
			"more interrupts in DMA mode\n");
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		ide_dma_off(drive);
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		return ide_do_reset(drive);
	}

	/* Get the number of bytes to transfer */
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	bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
		  hwif->INB(hwif->io_ports.lbam_addr);
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	/* on this interrupt */
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	ireason = hwif->INB(hwif->io_ports.nsect_addr);
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	if (ireason & CD) {
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		printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
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		return ide_do_reset(drive);
	}
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	if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
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		/* Hopefully, we will never get here */
		printk(KERN_ERR "ide-floppy: We wanted to %s, ",
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				(ireason & IO) ? "Write" : "Read");
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		printk(KERN_ERR "but the floppy wants us to %s !\n",
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				(ireason & IO) ? "Read" : "Write");
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		return ide_do_reset(drive);
	}
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	if (!(pc->flags & PC_FLAG_WRITING)) {
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		/* Reading - Check that we have enough space */
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		temp = pc->xferred + bcount;
		if (temp > pc->req_xfer) {
			if (temp > pc->buf_size) {
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				printk(KERN_ERR "ide-floppy: The floppy wants "
					"to send us more data than expected "
					"- discarding data\n");
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				ide_pad_transfer(drive, 0, bcount);
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				ide_set_handler(drive,
						&idefloppy_pc_intr,
						IDEFLOPPY_WAIT_CMD,
						NULL);
				return ide_started;
			}
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			debug_log("The floppy wants to send us more data than"
					" expected - allowing transfer\n");
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		}
	}
504
	if (pc->flags & PC_FLAG_WRITING)
505
		xferfunc = hwif->output_data;
506
	else
507
		xferfunc = hwif->input_data;
508

509
	if (pc->buf)
510
		xferfunc(drive, NULL, pc->cur_pos, bcount);
511
	else
512
		ide_floppy_io_buffers(drive, pc, bcount,
513
				      !!(pc->flags & PC_FLAG_WRITING));
514

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	/* Update the current position */
516 517
	pc->xferred += bcount;
	pc->cur_pos += bcount;
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519 520
	/* And set the interrupt handler again */
	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
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	return ide_started;
}

/*
 * This is the original routine that did the packet transfer.
 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
 * for that drive below. The algorithm is chosen based on drive type
 */
529
static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
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{
531
	ide_hwif_t *hwif = drive->hwif;
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	ide_startstop_t startstop;
	idefloppy_floppy_t *floppy = drive->driver_data;
534
	u8 ireason;
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	if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
		printk(KERN_ERR "ide-floppy: Strange, packet command "
				"initiated yet DRQ isn't asserted\n");
		return startstop;
	}
541
	ireason = hwif->INB(hwif->io_ports.nsect_addr);
542
	if ((ireason & CD) == 0 || (ireason & IO)) {
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		printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
				"issuing a packet command\n");
		return ide_do_reset(drive);
	}
547

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	/* Set the interrupt routine */
	ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
550

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	/* Send the actual packet */
552 553
	hwif->output_data(drive, NULL, floppy->pc->c, 12);

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	return ide_started;
}


/*
559 560 561 562
 * What we have here is a classic case of a top half / bottom half interrupt
 * service routine. In interrupt mode, the device sends an interrupt to signal
 * that it is ready to receive a packet. However, we need to delay about 2-3
 * ticks before issuing the packet or we gets in trouble.
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 *
564 565 566
 * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
 * In either case, when the device says it's ready for a packet, we schedule
 * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
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 */
568
static int idefloppy_transfer_pc2(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;

	/* Send the actual packet */
573 574
	drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);

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	/* Timeout for the packet command */
	return IDEFLOPPY_WAIT_CMD;
}

579
static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
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{
581
	ide_hwif_t *hwif = drive->hwif;
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	idefloppy_floppy_t *floppy = drive->driver_data;
	ide_startstop_t startstop;
584
	u8 ireason;
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	if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
		printk(KERN_ERR "ide-floppy: Strange, packet command "
				"initiated yet DRQ isn't asserted\n");
		return startstop;
	}
591
	ireason = hwif->INB(hwif->io_ports.nsect_addr);
592
	if ((ireason & CD) == 0 || (ireason & IO)) {
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		printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
				"while issuing a packet command\n");
		return ide_do_reset(drive);
	}
597
	/*
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	 * The following delay solves a problem with ATAPI Zip 100 drives
	 * where the Busy flag was apparently being deasserted before the
	 * unit was ready to receive data. This was happening on a
	 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
	 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
	 * used until after the packet is moved in about 50 msec.
	 */
605

606 607
	ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
			&idefloppy_transfer_pc2);
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	return ide_started;
}

611
static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
612
				    struct ide_atapi_pc *pc)
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{
614
	/* supress error messages resulting from Medium not present */
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	if (floppy->sense_key == 0x02 &&
	    floppy->asc       == 0x3a &&
	    floppy->ascq      == 0x00)
618 619 620 621 622 623 624
		return;

	printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
			"asc = %2x, ascq = %2x\n",
			floppy->drive->name, pc->c[0], floppy->sense_key,
			floppy->asc, floppy->ascq);

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}

627
static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
628
		struct ide_atapi_pc *pc)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
	ide_hwif_t *hwif = drive->hwif;
	ide_handler_t *pkt_xfer_routine;
633
	u16 bcount;
634
	u8 dma;
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	if (floppy->failed_pc == NULL &&
637
	    pc->c[0] != GPCMD_REQUEST_SENSE)
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		floppy->failed_pc = pc;
	/* Set the current packet command */
	floppy->pc = pc;

642
	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
643
		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
644 645 646 647
			ide_floppy_report_error(floppy, pc);
		/* Giving up */
		pc->error = IDEFLOPPY_ERROR_GENERAL;

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		floppy->failed_pc = NULL;
649
		pc->idefloppy_callback(drive);
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		return ide_stopped;
	}

653
	debug_log("Retry number - %d\n", pc->retries);
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	pc->retries++;
	/* We haven't transferred any data yet */
657 658 659
	pc->xferred = 0;
	pc->cur_pos = pc->buf;
	bcount = min(pc->req_xfer, 63 * 1024);
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661 662
	if (pc->flags & PC_FLAG_DMA_ERROR) {
		pc->flags &= ~PC_FLAG_DMA_ERROR;
663
		ide_dma_off(drive);
664
	}
665
	dma = 0;
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667
	if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
668
		dma = !hwif->dma_ops->dma_setup(drive);
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670 671
	ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
			   IDE_TFLAG_OUT_DEVICE, bcount, dma);
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673 674
	if (dma) {
		/* Begin DMA, if necessary */
675
		pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
676
		hwif->dma_ops->dma_start(drive);
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	}

	/* Can we transfer the packet when we get the interrupt or wait? */
680
	if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
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		/* wait */
		pkt_xfer_routine = &idefloppy_transfer_pc1;
	} else {
		/* immediate */
		pkt_xfer_routine = &idefloppy_transfer_pc;
	}
687

688
	if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
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		/* Issue the packet command */
		ide_execute_command(drive, WIN_PACKETCMD,
				pkt_xfer_routine,
				IDEFLOPPY_WAIT_CMD,
				NULL);
		return ide_started;
	} else {
		/* Issue the packet command */
697
		ide_execute_pkt_cmd(drive);
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		return (*pkt_xfer_routine) (drive);
	}
}

702
static void idefloppy_rw_callback(ide_drive_t *drive)
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{
704
	debug_log("Reached %s\n", __func__);
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706
	idefloppy_end_request(drive, 1, 0);
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	return;
}

710
static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
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{
712
	debug_log("creating prevent removal command, prevent = %d\n", prevent);
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	idefloppy_init_pc(pc);
715
	pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
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	pc->c[4] = prevent;
}

719
static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
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{
	idefloppy_init_pc(pc);
722
	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
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	pc->c[7] = 255;
	pc->c[8] = 255;
725
	pc->req_xfer = 255;
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}

728 729
static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
		int l, int flags)
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{
	idefloppy_init_pc(pc);
732
	pc->c[0] = GPCMD_FORMAT_UNIT;
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	pc->c[1] = 0x17;

735 736
	memset(pc->buf, 0, 12);
	pc->buf[1] = 0xA2;
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	/* Default format list header, u8 1: FOV/DCRT/IMM bits set */

	if (flags & 1)				/* Verify bit on... */
740 741
		pc->buf[1] ^= 0x20;		/* ... turn off DCRT bit */
	pc->buf[3] = 8;
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743 744 745
	put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
	put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
	pc->buf_size = 12;
746
	pc->flags |= PC_FLAG_WRITING;
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}

749
/* A mode sense command is used to "sense" floppy parameters. */
750 751
static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
		u8 page_code, u8 type)
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{
753
	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
754

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	idefloppy_init_pc(pc);
756
	pc->c[0] = GPCMD_MODE_SENSE_10;
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	pc->c[1] = 0;
	pc->c[2] = page_code + (type << 6);

	switch (page_code) {
761 762 763 764 765 766 767 768
	case IDEFLOPPY_CAPABILITIES_PAGE:
		length += 12;
		break;
	case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
		length += 32;
		break;
	default:
		printk(KERN_ERR "ide-floppy: unsupported page code "
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				"in create_mode_sense_cmd\n");
	}
771
	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
772
	pc->req_xfer = length;
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}

775
static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
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{
	idefloppy_init_pc(pc);
778
	pc->c[0] = GPCMD_START_STOP_UNIT;
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	pc->c[4] = start;
}

782
static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
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{
	idefloppy_init_pc(pc);
785
	pc->c[0] = GPCMD_TEST_UNIT_READY;
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}

788
static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
789
				    struct ide_atapi_pc *pc, struct request *rq,
790
				    unsigned long sector)
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{
	int block = sector / floppy->bs_factor;
	int blocks = rq->nr_sectors / floppy->bs_factor;
	int cmd = rq_data_dir(rq);

796
	debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
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		block, blocks);

	idefloppy_init_pc(pc);
800 801
	pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
	put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
802
	put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
803

804
	pc->idefloppy_callback = &idefloppy_rw_callback;
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	pc->rq = rq;
	pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
807
	if (rq->cmd_flags & REQ_RW)
808
		pc->flags |= PC_FLAG_WRITING;
809 810
	pc->buf = NULL;
	pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
811
	pc->flags |= PC_FLAG_DMA_RECOMMENDED;
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}

814
static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
815
		struct ide_atapi_pc *pc, struct request *rq)
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{
	idefloppy_init_pc(pc);
818
	pc->idefloppy_callback = &idefloppy_rw_callback;
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	memcpy(pc->c, rq->cmd, sizeof(pc->c));
820 821 822
	pc->rq = rq;
	pc->b_count = rq->data_len;
	if (rq->data_len && rq_data_dir(rq) == WRITE)
823
		pc->flags |= PC_FLAG_WRITING;
824
	pc->buf = rq->data;
825
	if (rq->bio)
826
		pc->flags |= PC_FLAG_DMA_RECOMMENDED;
827 828 829 830
	/*
	 * possibly problematic, doesn't look like ide-floppy correctly
	 * handled scattered requests if dma fails...
	 */
831
	pc->req_xfer = pc->buf_size = rq->data_len;
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}

834 835
static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
		struct request *rq, sector_t block_s)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
838
	struct ide_atapi_pc *pc;
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	unsigned long block = (unsigned long)block_s;

841
	debug_log("dev: %s, cmd_type: %x, errors: %d\n",
842
			rq->rq_disk ? rq->rq_disk->disk_name : "?",
843 844
			rq->cmd_type, rq->errors);
	debug_log("sector: %ld, nr_sectors: %ld, "
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			"current_nr_sectors: %d\n", (long)rq->sector,
			rq->nr_sectors, rq->current_nr_sectors);

	if (rq->errors >= ERROR_MAX) {
849 850
		if (floppy->failed_pc)
			ide_floppy_report_error(floppy, floppy->failed_pc);
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		else
			printk(KERN_ERR "ide-floppy: %s: I/O error\n",
				drive->name);
854
		idefloppy_end_request(drive, 0, 0);
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		return ide_stopped;
	}
857
	if (blk_fs_request(rq)) {
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		if (((long)rq->sector % floppy->bs_factor) ||
		    (rq->nr_sectors % floppy->bs_factor)) {
860 861
			printk(KERN_ERR "%s: unsupported r/w request size\n",
					drive->name);
862
			idefloppy_end_request(drive, 0, 0);
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			return ide_stopped;
		}
		pc = idefloppy_next_pc_storage(drive);
		idefloppy_create_rw_cmd(floppy, pc, rq, block);
867
	} else if (blk_special_request(rq)) {
868
		pc = (struct ide_atapi_pc *) rq->buffer;
869
	} else if (blk_pc_request(rq)) {
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		pc = idefloppy_next_pc_storage(drive);
871
		idefloppy_blockpc_cmd(floppy, pc, rq);
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	} else {
		blk_dump_rq_flags(rq,
			"ide-floppy: unsupported command in queue");
875
		idefloppy_end_request(drive, 0, 0);
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		return ide_stopped;
	}

	pc->rq = rq;
	return idefloppy_issue_pc(drive, pc);
}

/*
884 885
 * Add a special packet command request to the tail of the request queue,
 * and wait for it to be serviced.
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 */
887
static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
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{
	struct ide_floppy_obj *floppy = drive->driver_data;
890 891
	struct request *rq;
	int error;
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893 894 895 896 897
	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
	rq->buffer = (char *) pc;
	rq->cmd_type = REQ_TYPE_SPECIAL;
	error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
	blk_put_request(rq);
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899
	return error;
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}

/*
903 904
 * Look at the flexible disk page parameters. We ignore the CHS capacity
 * parameters and use the LBA parameters instead.
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 */
906
static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
909
	struct ide_atapi_pc pc;
910
	u8 *page;
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	int capacity, lba_capacity;
912 913
	u16 transfer_rate, sector_size, cyls, rpm;
	u8 heads, sectors;
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915 916 917 918 919 920
	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
					MODE_SENSE_CURRENT);

	if (idefloppy_queue_pc_tail(drive, &pc)) {
		printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
				" parameters\n");
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		return 1;
	}
923
	floppy->wp = !!(pc.buf[3] & 0x80);
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	set_disk_ro(floppy->disk, floppy->wp);
925
	page = &pc.buf[8];
926

927 928 929 930 931 932
	transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
	sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
	cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
	rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
	heads         = pc.buf[8 + 4];
	sectors       = pc.buf[8 + 5];
933 934 935 936

	capacity = cyls * heads * sectors * sector_size;

	if (memcmp(page, &floppy->flexible_disk_page, 32))
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		printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
				"%d sector size, %d rpm\n",
939 940 941 942 943 944 945
				drive->name, capacity / 1024, cyls, heads,
				sectors, transfer_rate / 8, sector_size, rpm);

	memcpy(&floppy->flexible_disk_page, page, 32);
	drive->bios_cyl = cyls;
	drive->bios_head = heads;
	drive->bios_sect = sectors;
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	lba_capacity = floppy->blocks * floppy->block_size;
947

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	if (capacity < lba_capacity) {
		printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
			"bytes, but the drive only handles %d\n",
			drive->name, lba_capacity, capacity);
952 953
		floppy->blocks = floppy->block_size ?
			capacity / floppy->block_size : 0;
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	}
	return 0;
}

958
static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
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959 960
{
	idefloppy_floppy_t *floppy = drive->driver_data;
961
	struct ide_atapi_pc pc;
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	floppy->srfp = 0;
	idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
						 MODE_SENSE_CURRENT);

967
	pc.flags |= PC_FLAG_SUPPRESS_ERROR;
968
	if (idefloppy_queue_pc_tail(drive, &pc))
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		return 1;

971
	floppy->srfp = pc.buf[8 + 2] & 0x40;
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	return (0);
}

/*
976 977
 * Determine if a media is present in the floppy drive, and if so, its LBA
 * capacity.
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 */
979
static int ide_floppy_get_capacity(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
982
	struct ide_atapi_pc pc;
983 984 985 986
	u8 *cap_desc;
	u8 header_len, desc_cnt;
	int i, rc = 1, blocks, length;

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	drive->bios_cyl = 0;
	drive->bios_head = drive->bios_sect = 0;
989 990
	floppy->blocks = 0;
	floppy->bs_factor = 1;
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	set_capacity(floppy->disk, 0);

	idefloppy_create_read_capacity_cmd(&pc);
	if (idefloppy_queue_pc_tail(drive, &pc)) {
		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
		return 1;
	}
998 999
	header_len = pc.buf[3];
	cap_desc = &pc.buf[4];
1000 1001 1002 1003 1004
	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */

	for (i = 0; i < desc_cnt; i++) {
		unsigned int desc_start = 4 + i*8;

1005 1006
		blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
		length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1007 1008 1009

		debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
				i, blocks * length / 1024, blocks, length);
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1011 1012 1013 1014 1015
		if (i)
			continue;
		/*
		 * the code below is valid only for the 1st descriptor, ie i=0
		 */
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1017
		switch (pc.buf[desc_start + 4] & 0x03) {
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		/* Clik! drive returns this instead of CAPACITY_CURRENT */
		case CAPACITY_UNFORMATTED:
1020
			if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1021
				/*
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				 * If it is not a clik drive, break out
				 * (maintains previous driver behaviour)
				 */
				break;
		case CAPACITY_CURRENT:
			/* Normal Zip/LS-120 disks */
1028
			if (memcmp(cap_desc, &floppy->cap_desc, 8))
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				printk(KERN_INFO "%s: %dkB, %d blocks, %d "
					"sector size\n", drive->name,
					blocks * length / 1024, blocks, length);
1032 1033
			memcpy(&floppy->cap_desc, cap_desc, 8);

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			if (!length || length % 512) {
				printk(KERN_NOTICE "%s: %d bytes block size "
					"not supported\n", drive->name, length);
			} else {
1038 1039 1040 1041 1042
				floppy->blocks = blocks;
				floppy->block_size = length;
				floppy->bs_factor = length / 512;
				if (floppy->bs_factor != 1)
					printk(KERN_NOTICE "%s: warning: non "
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						"512 bytes block size not "
						"fully supported\n",
						drive->name);
1046
				rc = 0;
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			}
			break;
		case CAPACITY_NO_CARTRIDGE:
			/*
			 * This is a KERN_ERR so it appears on screen
			 * for the user to see
			 */
			printk(KERN_ERR "%s: No disk in drive\n", drive->name);
			break;
		case CAPACITY_INVALID:
			printk(KERN_ERR "%s: Invalid capacity for disk "
				"in drive\n", drive->name);
			break;
		}
1061
		debug_log("Descriptor 0 Code: %d\n",
1062
			  pc.buf[desc_start + 4] & 0x03);
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	}

	/* Clik! disk does not support get_flexible_disk_page */
1066
	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1067
		(void) ide_floppy_get_flexible_disk_page(drive);
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	set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
	return rc;
}

/*
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
 * Obtain the list of formattable capacities.
 * Very similar to ide_floppy_get_capacity, except that we push the capacity
 * descriptors to userland, instead of our own structures.
 *
 * Userland gives us the following structure:
 *
 * struct idefloppy_format_capacities {
 *	int nformats;
 *	struct {
 *		int nblocks;
 *		int blocksize;
 *	} formats[];
 * };
 *
 * userland initializes nformats to the number of allocated formats[] records.
 * On exit we set nformats to the number of records we've actually initialized.
 */
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1092
static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
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{
1094
	struct ide_atapi_pc pc;
1095 1096
	u8 header_len, desc_cnt;
	int i, blocks, length, u_array_size, u_index;
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	int __user *argp;

	if (get_user(u_array_size, arg))
		return (-EFAULT);

	if (u_array_size <= 0)
		return (-EINVAL);

	idefloppy_create_read_capacity_cmd(&pc);
	if (idefloppy_queue_pc_tail(drive, &pc)) {
		printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1108 1109
		return (-EIO);
	}
1110
	header_len = pc.buf[3];
1111
	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
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	u_index = 0;
	argp = arg + 1;

	/*
1117 1118 1119 1120 1121 1122
	 * We always skip the first capacity descriptor.  That's the current
	 * capacity.  We are interested in the remaining descriptors, the
	 * formattable capacities.
	 */
	for (i = 1; i < desc_cnt; i++) {
		unsigned int desc_start = 4 + i*8;
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		if (u_index >= u_array_size)
			break;	/* User-supplied buffer too small */

1127 1128
		blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
		length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
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		if (put_user(blocks, argp))
			return(-EFAULT);
		++argp;

		if (put_user(length, argp))
			return (-EFAULT);
		++argp;

		++u_index;
	}

	if (put_user(u_index, arg))
		return (-EFAULT);
	return (0);
}

/*
1147 1148 1149 1150 1151 1152 1153 1154
 * Get ATAPI_FORMAT_UNIT progress indication.
 *
 * Userland gives a pointer to an int.  The int is set to a progress
 * indicator 0-65536, with 65536=100%.
 *
 * If the drive does not support format progress indication, we just check
 * the dsc bit, and return either 0 or 65536.
 */
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static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
{
	idefloppy_floppy_t *floppy = drive->driver_data;
1159
	struct ide_atapi_pc pc;
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	int progress_indication = 0x10000;

	if (floppy->srfp) {
		idefloppy_create_request_sense_cmd(&pc);
1164
		if (idefloppy_queue_pc_tail(drive, &pc))
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			return (-EIO);

		if (floppy->sense_key == 2 &&
		    floppy->asc == 4 &&
1169
		    floppy->ascq == 4)
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			progress_indication = floppy->progress_indication;
1171 1172

		/* Else assume format_unit has finished, and we're at 0x10000 */
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	} else {
		unsigned long flags;
1175
		u8 stat;
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		local_irq_save(flags);
1178
		stat = ide_read_status(drive);
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		local_irq_restore(flags);

1181
		progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
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	}
	if (put_user(progress_indication, arg))
		return (-EFAULT);

	return (0);
}

1189
static sector_t idefloppy_capacity(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
	unsigned long capacity = floppy->blocks * floppy->bs_factor;

	return capacity;
}

/*
1198 1199
 * Check whether we can support a drive, based on the ATAPI IDENTIFY command
 * results.
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 */
1201
static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
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{
1203 1204
	u8 gcw[2];
	u8 device_type, protocol, removable, drq_type, packet_size;
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	*((u16 *) &gcw) = id->config;

1208 1209 1210 1211 1212 1213
	device_type =  gcw[1] & 0x1F;
	removable   = (gcw[0] & 0x80) >> 7;
	protocol    = (gcw[1] & 0xC0) >> 6;
	drq_type    = (gcw[0] & 0x60) >> 5;
	packet_size =  gcw[0] & 0x03;

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#ifdef CONFIG_PPC
	/* kludge for Apple PowerBook internal zip */
1216 1217 1218
	if (device_type == 5 &&
	    !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
		device_type = 0;
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#endif

1221
	if (protocol != 2)
1222
		printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1223 1224
			protocol);
	else if (device_type != 0)
1225
		printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1226 1227
				"to floppy\n", device_type);
	else if (!removable)
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		printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1229
	else if (drq_type == 3)
1230
		printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1231 1232
				"supported\n", drq_type);
	else if (packet_size != 0)
1233
		printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1234 1235
				"bytes\n", packet_size);
	else
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		return 1;
	return 0;
}

1240
#ifdef CONFIG_IDE_PROC_FS
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static void idefloppy_add_settings(ide_drive_t *drive)
{
	idefloppy_floppy_t *floppy = drive->driver_data;

1245 1246 1247 1248 1249 1250 1251 1252
	ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
			&drive->bios_cyl, NULL);
	ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
			&drive->bios_head, NULL);
	ide_add_setting(drive, "bios_sect", SETTING_RW,	TYPE_BYTE, 0,  63, 1, 1,
			&drive->bios_sect, NULL);
	ide_add_setting(drive, "ticks",	   SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
			&floppy->ticks,	 NULL);
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}
1254 1255 1256
#else
static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
#endif
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1258
static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
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{
1260
	u8 gcw[2];
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	*((u16 *) &gcw) = drive->id->config;
	floppy->pc = floppy->pc_stack;
1264 1265

	if (((gcw[0] & 0x60) >> 5) == 1)
1266
		floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
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	/*
1268 1269
	 * We used to check revisions here. At this point however I'm giving up.
	 * Just assume they are all broken, its easier.
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	 *
1271 1272 1273 1274
	 * The actual reason for the workarounds was likely a driver bug after
	 * all rather than a firmware bug, and the workaround below used to hide
	 * it. It should be fixed as of version 1.9, but to be on the safe side
	 * we'll leave the limitation below for the 2.2.x tree.
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	 */
	if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1277
		floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
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		/* This value will be visible in the /proc/ide/hdx/settings */
		floppy->ticks = IDEFLOPPY_TICKS_DELAY;
		blk_queue_max_sectors(drive->queue, 64);
	}

	/*
1284 1285 1286
	 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
	 * nasty clicking noises without it, so please don't remove this.
	 */
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	if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
		blk_queue_max_sectors(drive->queue, 64);
1289
		floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
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	}

1292
	(void) ide_floppy_get_capacity(drive);
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	idefloppy_add_settings(drive);
}

1296
static void ide_floppy_remove(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy = drive->driver_data;
	struct gendisk *g = floppy->disk;

1301
	ide_proc_unregister_driver(drive, floppy->driver);
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1302 1303 1304 1305 1306 1307

	del_gendisk(g);

	ide_floppy_put(floppy);
}

1308
static void idefloppy_cleanup_obj(struct kref *kref)
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{
	struct ide_floppy_obj *floppy = to_ide_floppy(kref);
	ide_drive_t *drive = floppy->drive;
	struct gendisk *g = floppy->disk;

	drive->driver_data = NULL;
	g->private_data = NULL;
	put_disk(g);
	kfree(floppy);
}

1320
#ifdef CONFIG_IDE_PROC_FS
1321 1322
static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
		int count, int *eof, void *data)
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{
	ide_drive_t*drive = (ide_drive_t *)data;
	int len;

1327 1328
	len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
	PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
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}

static ide_proc_entry_t idefloppy_proc[] = {
1332 1333
	{ "capacity",	S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,	NULL },
	{ "geometry",	S_IFREG|S_IRUGO, proc_ide_read_geometry,	NULL },
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	{ NULL, 0, NULL, NULL }
};
1336
#endif	/* CONFIG_IDE_PROC_FS */
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1338
static int ide_floppy_probe(ide_drive_t *);
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static ide_driver_t idefloppy_driver = {
1341
	.gen_driver = {
1342
		.owner		= THIS_MODULE,
1343 1344 1345
		.name		= "ide-floppy",
		.bus		= &ide_bus_type,
	},
1346 1347
	.probe			= ide_floppy_probe,
	.remove			= ide_floppy_remove,
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	.version		= IDEFLOPPY_VERSION,
	.media			= ide_floppy,
	.supports_dsc_overlap	= 0,
	.do_request		= idefloppy_do_request,
1352
	.end_request		= idefloppy_end_request,
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	.error			= __ide_error,
	.abort			= __ide_abort,
1355
#ifdef CONFIG_IDE_PROC_FS
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	.proc			= idefloppy_proc,
1357
#endif
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};

static int idefloppy_open(struct inode *inode, struct file *filp)
{
	struct gendisk *disk = inode->i_bdev->bd_disk;
	struct ide_floppy_obj *floppy;
	ide_drive_t *drive;
1365
	struct ide_atapi_pc pc;
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	int ret = 0;

1368
	debug_log("Reached %s\n", __func__);
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1370 1371
	floppy = ide_floppy_get(disk);
	if (!floppy)
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		return -ENXIO;

	drive = floppy->drive;

1376
	floppy->openers++;
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1378
	if (floppy->openers == 1) {
1379
		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
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		/* Just in case */

		idefloppy_create_test_unit_ready_cmd(&pc);
		if (idefloppy_queue_pc_tail(drive, &pc)) {
			idefloppy_create_start_stop_cmd(&pc, 1);
			(void) idefloppy_queue_pc_tail(drive, &pc);
		}

1388
		if (ide_floppy_get_capacity(drive)
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		   && (filp->f_flags & O_NDELAY) == 0
		    /*
1391 1392 1393 1394
		     * Allow O_NDELAY to open a drive without a disk, or with an
		     * unreadable disk, so that we can get the format capacity
		     * of the drive or begin the format - Sam
		     */
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		    ) {
			ret = -EIO;
			goto out_put_floppy;
		}

		if (floppy->wp && (filp->f_mode & 2)) {
			ret = -EROFS;
			goto out_put_floppy;
		}
1404
		floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
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		/* IOMEGA Clik! drives do not support lock/unlock commands */
1406
		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
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			idefloppy_create_prevent_cmd(&pc, 1);
			(void) idefloppy_queue_pc_tail(drive, &pc);
		}
		check_disk_change(inode->i_bdev);
1411
	} else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
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		ret = -EBUSY;
		goto out_put_floppy;
	}
	return 0;

out_put_floppy:
1418
	floppy->openers--;
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	ide_floppy_put(floppy);
	return ret;
}

static int idefloppy_release(struct inode *inode, struct file *filp)
{
	struct gendisk *disk = inode->i_bdev->bd_disk;
	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
	ide_drive_t *drive = floppy->drive;
1428
	struct ide_atapi_pc pc;
1429 1430

	debug_log("Reached %s\n", __func__);
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1432
	if (floppy->openers == 1) {
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		/* IOMEGA Clik! drives do not support lock/unlock commands */
1434
		if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
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			idefloppy_create_prevent_cmd(&pc, 0);
			(void) idefloppy_queue_pc_tail(drive, &pc);
		}

1439
		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
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	}
1441 1442

	floppy->openers--;
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	ide_floppy_put(floppy);

	return 0;
}

1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459
static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
	struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
	ide_drive_t *drive = floppy->drive;

	geo->heads = drive->bios_head;
	geo->sectors = drive->bios_sect;
	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
	return 0;
}

1460 1461
static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
		struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1462 1463 1464 1465 1466 1467
{
	if (floppy->openers > 1)
		return -EBUSY;

	/* The IOMEGA Clik! Drive doesn't support this command -
	 * no room for an eject mechanism */
1468
	if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489
		int prevent = arg ? 1 : 0;

		if (cmd == CDROMEJECT)
			prevent = 0;

		idefloppy_create_prevent_cmd(pc, prevent);
		(void) idefloppy_queue_pc_tail(floppy->drive, pc);
	}

	if (cmd == CDROMEJECT) {
		idefloppy_create_start_stop_cmd(pc, 2);
		(void) idefloppy_queue_pc_tail(floppy->drive, pc);
	}

	return 0;
}

static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
				  int __user *arg)
{
	int blocks, length, flags, err = 0;
1490
	struct ide_atapi_pc pc;
1491 1492 1493

	if (floppy->openers > 1) {
		/* Don't format if someone is using the disk */
1494
		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1495 1496 1497
		return -EBUSY;
	}

1498
	floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529

	/*
	 * Send ATAPI_FORMAT_UNIT to the drive.
	 *
	 * Userland gives us the following structure:
	 *
	 * struct idefloppy_format_command {
	 *        int nblocks;
	 *        int blocksize;
	 *        int flags;
	 *        } ;
	 *
	 * flags is a bitmask, currently, the only defined flag is:
	 *
	 *        0x01 - verify media after format.
	 */
	if (get_user(blocks, arg) ||
			get_user(length, arg+1) ||
			get_user(flags, arg+2)) {
		err = -EFAULT;
		goto out;
	}

	(void) idefloppy_get_sfrp_bit(floppy->drive);
	idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);

	if (idefloppy_queue_pc_tail(floppy->drive, &pc))
		err = -EIO;

out:
	if (err)
1530
		floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1531 1532 1533 1534
	return err;
}


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static int idefloppy_ioctl(struct inode *inode, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	struct block_device *bdev = inode->i_bdev;
	struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
	ide_drive_t *drive = floppy->drive;
1541
	struct ide_atapi_pc pc;
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1542
	void __user *argp = (void __user *)arg;
1543
	int err;
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1544 1545 1546 1547 1548

	switch (cmd) {
	case CDROMEJECT:
		/* fall through */
	case CDROM_LOCKDOOR:
1549
		return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
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	case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
		return 0;
	case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1553
		return ide_floppy_get_format_capacities(drive, argp);
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	case IDEFLOPPY_IOCTL_FORMAT_START:
		if (!(file->f_mode & 2))
			return -EPERM;

1558
		return ide_floppy_format_unit(floppy, (int __user *)arg);
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	case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
		return idefloppy_get_format_progress(drive, argp);
	}
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576

	/*
	 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
	 * and CDROM_SEND_PACKET (legacy) ioctls
	 */
	if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
		err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
					bdev->bd_disk, cmd, argp);
	else
		err = -ENOTTY;

	if (err == -ENOTTY)
		err = generic_ide_ioctl(drive, file, bdev, cmd, arg);

	return err;
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}

static int idefloppy_media_changed(struct gendisk *disk)
{
	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
	ide_drive_t *drive = floppy->drive;
1583
	int ret;
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	/* do not scan partitions twice if this is a removable device */
	if (drive->attach) {
		drive->attach = 0;
		return 0;
	}
1590 1591 1592
	ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
	floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
	return ret;
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}

static int idefloppy_revalidate_disk(struct gendisk *disk)
{
	struct ide_floppy_obj *floppy = ide_floppy_g(disk);
	set_capacity(disk, idefloppy_capacity(floppy->drive));
	return 0;
}

static struct block_device_operations idefloppy_ops = {
1603 1604 1605 1606 1607 1608 1609
	.owner			= THIS_MODULE,
	.open			= idefloppy_open,
	.release		= idefloppy_release,
	.ioctl			= idefloppy_ioctl,
	.getgeo			= idefloppy_getgeo,
	.media_changed		= idefloppy_media_changed,
	.revalidate_disk	= idefloppy_revalidate_disk
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};

1612
static int ide_floppy_probe(ide_drive_t *drive)
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{
	idefloppy_floppy_t *floppy;
	struct gendisk *g;

	if (!strstr("ide-floppy", drive->driver_req))
		goto failed;
	if (!drive->present)
		goto failed;
	if (drive->media != ide_floppy)
		goto failed;
1623 1624 1625
	if (!idefloppy_identify_device(drive, drive->id)) {
		printk(KERN_ERR "ide-floppy: %s: not supported by this version"
				" of ide-floppy\n", drive->name);
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		goto failed;
	}
	if (drive->scsi) {
1629 1630
		printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
				" emulation.\n", drive->name);
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1631 1632
		goto failed;
	}
1633 1634 1635 1636
	floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
	if (!floppy) {
		printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
				" structure\n", drive->name);
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1637 1638 1639 1640 1641 1642 1643 1644 1645
		goto failed;
	}

	g = alloc_disk(1 << PARTN_BITS);
	if (!g)
		goto out_free_floppy;

	ide_init_disk(g, drive);

1646
	ide_proc_register_driver(drive, &idefloppy_driver);
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1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657

	kref_init(&floppy->kref);

	floppy->drive = drive;
	floppy->driver = &idefloppy_driver;
	floppy->disk = g;

	g->private_data = &floppy->driver;

	drive->driver_data = floppy;

1658
	idefloppy_setup(drive, floppy);
1659

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1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670
	g->minors = 1 << PARTN_BITS;
	g->driverfs_dev = &drive->gendev;
	g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
	g->fops = &idefloppy_ops;
	drive->attach = 1;
	add_disk(g);
	return 0;

out_free_floppy:
	kfree(floppy);
failed:
1671
	return -ENODEV;
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1672 1673
}

1674
static void __exit idefloppy_exit(void)
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1675
{
1676
	driver_unregister(&idefloppy_driver.gen_driver);
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1677 1678
}

1679
static int __init idefloppy_init(void)
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1680 1681
{
	printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1682
	return driver_register(&idefloppy_driver.gen_driver);
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1683 1684
}

1685
MODULE_ALIAS("ide:*m-floppy*");
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module_init(idefloppy_init);
module_exit(idefloppy_exit);
MODULE_LICENSE("GPL");
1689 1690
MODULE_DESCRIPTION("ATAPI FLOPPY Driver");