drivers/ide/ide-floppy.c - kernel/msm-4.9 - Gitiles

 /*
  * 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/slab.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/irq.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)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct ide_atapi_pc *pc = drive->pc;
 	struct request *rq = pc->rq;
 	int uptodate = pc->error ? 0 : 1;

 	ide_debug_log(IDE_DBG_FUNC, "enter");

 	if (drive->failed_pc == pc)
 		drive->failed_pc = NULL;

 	if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
 	    (rq && blk_pc_request(rq)))
 		uptodate = 1; /* FIXME */
 	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
 		u8 *buf = pc->buf;

 		if (!pc->error) {
 			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 (drive->failed_pc)
 				ide_debug_log(IDE_DBG_PC, "pc = %x",
 					      drive->failed_pc->c[0]);

 			ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
 				      "ascq = %x", floppy->sense_key,
 				      floppy->asc, floppy->ascq);
 		} else
 			printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
 			       "Aborting request!\n");
 	}

 	if (blk_special_request(rq))
 		rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;

 	return uptodate;
 }

 static void ide_floppy_report_error(struct ide_disk_obj *floppy,
 				    struct ide_atapi_pc *pc)
 {
 	/* supress error messages resulting from Medium not present */
 	if (floppy->sense_key == 0x02 &&
 	    floppy->asc       == 0x3a &&
 	    floppy->ascq      == 0x00)
 		return;

 	printk(KERN_ERR PFX "%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);

 }

 static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
 					   struct ide_cmd *cmd,
 					   struct ide_atapi_pc *pc)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;

 	if (drive->failed_pc == NULL &&
 	    pc->c[0] != GPCMD_REQUEST_SENSE)
 		drive->failed_pc = pc;

 	/* Set the current packet command */
 	drive->pc = pc;

 	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
 		unsigned int done = blk_rq_bytes(drive->hwif->rq);

 		if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
 			ide_floppy_report_error(floppy, pc);

 		/* Giving up */
 		pc->error = IDE_DRV_ERROR_GENERAL;

 		drive->failed_pc = NULL;
 		drive->pc_callback(drive, 0);
 		ide_complete_rq(drive, -EIO, done);
 		return ide_stopped;
 	}

 	ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);

 	pc->retries++;

 	return ide_issue_pc(drive, cmd);
 }

 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
 {
 	ide_init_pc(pc);
 	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
 	pc->c[7] = 255;
 	pc->c[8] = 255;
 	pc->req_xfer = 255;
 }

 /* A mode sense command is used to "sense" floppy parameters. */
 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
 {
 	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */

 	ide_init_pc(pc);
 	pc->c[0] = GPCMD_MODE_SENSE_10;
 	pc->c[1] = 0;
 	pc->c[2] = page_code;

 	switch (page_code) {
 	case IDEFLOPPY_CAPABILITIES_PAGE:
 		length += 12;
 		break;
 	case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
 		length += 32;
 		break;
 	default:
 		printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
 	}
 	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
 	pc->req_xfer = length;
 }

 static void idefloppy_create_rw_cmd(ide_drive_t *drive,
 				    struct ide_atapi_pc *pc, struct request *rq,
 				    unsigned long sector)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	int block = sector / floppy->bs_factor;
 	int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
 	int cmd = rq_data_dir(rq);

 	ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);

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

 	memcpy(rq->cmd, pc->c, 12);

 	pc->rq = rq;
 	if (rq->cmd_flags & REQ_RW)
 		pc->flags |= PC_FLAG_WRITING;
 	pc->buf = NULL;
 	pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
 	pc->flags |= PC_FLAG_DMA_OK;
 }

 static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
 		struct ide_atapi_pc *pc, struct request *rq)
 {
 	ide_init_pc(pc);
 	memcpy(pc->c, rq->cmd, sizeof(pc->c));
 	pc->rq = rq;
 	if (blk_rq_bytes(rq)) {
 		pc->flags |= PC_FLAG_DMA_OK;
 		if (rq_data_dir(rq) == WRITE)
 			pc->flags |= PC_FLAG_WRITING;
 	}
 	/* pio will be performed by ide_pio_bytes() which handles sg fine */
 	pc->buf = NULL;
 	pc->req_xfer = pc->buf_size = blk_rq_bytes(rq);
 }

 static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
 					     struct request *rq, sector_t block)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct ide_cmd cmd;
 	struct ide_atapi_pc *pc;

 	ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);

 	if (drive->debug_mask & IDE_DBG_RQ)
 		blk_dump_rq_flags(rq, (rq->rq_disk
 					? rq->rq_disk->disk_name
 					: "dev?"));

 	if (rq->errors >= ERROR_MAX) {
 		if (drive->failed_pc) {
 			ide_floppy_report_error(floppy, drive->failed_pc);
 			drive->failed_pc = NULL;
 		} else
 			printk(KERN_ERR PFX "%s: I/O error\n", drive->name);

 		if (blk_special_request(rq)) {
 			rq->errors = 0;
 			ide_complete_rq(drive, 0, blk_rq_bytes(rq));
 			return ide_stopped;
 		} else
 			goto out_end;
 	}
 	if (blk_fs_request(rq)) {
 		if (((long)blk_rq_pos(rq) % floppy->bs_factor) ||
 		    (blk_rq_sectors(rq) % floppy->bs_factor)) {
 			printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
 				drive->name);
 			goto out_end;
 		}
 		pc = &floppy->queued_pc;
 		idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
 	} else if (blk_special_request(rq) || blk_sense_request(rq)) {
 		pc = (struct ide_atapi_pc *)rq->special;
 	} else if (blk_pc_request(rq)) {
 		pc = &floppy->queued_pc;
 		idefloppy_blockpc_cmd(floppy, pc, rq);
 	} else {
 		blk_dump_rq_flags(rq, PFX "unsupported command in queue");
 		goto out_end;
 	}

 	ide_prep_sense(drive, rq);

 	memset(&cmd, 0, sizeof(cmd));

 	if (rq_data_dir(rq))
 		cmd.tf_flags |= IDE_TFLAG_WRITE;

 	cmd.rq = rq;

 	if (blk_fs_request(rq) || pc->req_xfer) {
 		ide_init_sg_cmd(&cmd, pc->req_xfer);
 		ide_map_sg(drive, &cmd);
 	}

 	pc->rq = rq;

 	return ide_floppy_issue_pc(drive, &cmd, pc);
 out_end:
 	drive->failed_pc = NULL;
 	if (blk_fs_request(rq) == 0 && rq->errors == 0)
 		rq->errors = -EIO;
 	ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
 	return ide_stopped;
 }

 /*
  * Look at the flexible disk page parameters. We ignore the CHS capacity
  * parameters and use the LBA parameters instead.
  */
 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
 					     struct ide_atapi_pc *pc)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct gendisk *disk = floppy->disk;
 	u8 *page;
 	int capacity, lba_capacity;
 	u16 transfer_rate, sector_size, cyls, rpm;
 	u8 heads, sectors;

 	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);

 	if (ide_queue_pc_tail(drive, disk, pc)) {
 		printk(KERN_ERR PFX "Can't get flexible disk page params\n");
 		return 1;
 	}

 	if (pc->buf[3] & 0x80)
 		drive->dev_flags |= IDE_DFLAG_WP;
 	else
 		drive->dev_flags &= ~IDE_DFLAG_WP;

 	set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));

 	page = &pc->buf[8];

 	transfer_rate = be16_to_cpup((__be16 *)&pc->buf[8 + 2]);
 	sector_size   = be16_to_cpup((__be16 *)&pc->buf[8 + 6]);
 	cyls          = be16_to_cpup((__be16 *)&pc->buf[8 + 8]);
 	rpm           = be16_to_cpup((__be16 *)&pc->buf[8 + 28]);
 	heads         = pc->buf[8 + 4];
 	sectors       = pc->buf[8 + 5];

 	capacity = cyls * heads * sectors * sector_size;

 	if (memcmp(page, &floppy->flexible_disk_page, 32))
 		printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
 				"%d sector size, %d rpm\n",
 				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;
 	lba_capacity = floppy->blocks * floppy->block_size;

 	if (capacity < lba_capacity) {
 		printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
 			"bytes, but the drive only handles %d\n",
 			drive->name, lba_capacity, capacity);
 		floppy->blocks = floppy->block_size ?
 			capacity / floppy->block_size : 0;
 		drive->capacity64 = floppy->blocks * floppy->bs_factor;
 	}

 	return 0;
 }

 /*
  * Determine if a media is present in the floppy drive, and if so, its LBA
  * capacity.
  */
 static int ide_floppy_get_capacity(ide_drive_t *drive)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	struct gendisk *disk = floppy->disk;
 	struct ide_atapi_pc pc;
 	u8 *cap_desc;
 	u8 pc_buf[256], header_len, desc_cnt;
 	int i, rc = 1, blocks, length;

 	ide_debug_log(IDE_DBG_FUNC, "enter");

 	drive->bios_cyl = 0;
 	drive->bios_head = drive->bios_sect = 0;
 	floppy->blocks = 0;
 	floppy->bs_factor = 1;
 	drive->capacity64 = 0;

 	ide_floppy_create_read_capacity_cmd(&pc);
 	pc.buf = &pc_buf[0];
 	pc.buf_size = sizeof(pc_buf);

 	if (ide_queue_pc_tail(drive, disk, &pc)) {
 		printk(KERN_ERR PFX "Can't get floppy parameters\n");
 		return 1;
 	}
 	header_len = pc.buf[3];
 	cap_desc = &pc.buf[4];
 	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */

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

 		blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
 		length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);

 		ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
 					     "%d sector size",
 					     i, blocks * length / 1024,
 					     blocks, length);

 		if (i)
 			continue;
 		/*
 		 * the code below is valid only for the 1st descriptor, ie i=0
 		 */

 		switch (pc.buf[desc_start + 4] & 0x03) {
 		/* Clik! drive returns this instead of CAPACITY_CURRENT */
 		case CAPACITY_UNFORMATTED:
 			if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 				/*
 				 * If it is not a clik drive, break out
 				 * (maintains previous driver behaviour)
 				 */
 				break;
 		case CAPACITY_CURRENT:
 			/* Normal Zip/LS-120 disks */
 			if (memcmp(cap_desc, &floppy->cap_desc, 8))
 				printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
 				       "sector size\n",
 				       drive->name, blocks * length / 1024,
 				       blocks, length);
 			memcpy(&floppy->cap_desc, cap_desc, 8);

 			if (!length || length % 512) {
 				printk(KERN_NOTICE PFX "%s: %d bytes block size"
 				       " not supported\n", drive->name, length);
 			} else {
 				floppy->blocks = blocks;
 				floppy->block_size = length;
 				floppy->bs_factor = length / 512;
 				if (floppy->bs_factor != 1)
 					printk(KERN_NOTICE PFX "%s: Warning: "
 					       "non 512 bytes block size not "
 					       "fully supported\n",
 					       drive->name);
 				drive->capacity64 =
 					floppy->blocks * floppy->bs_factor;
 				rc = 0;
 			}
 			break;
 		case CAPACITY_NO_CARTRIDGE:
 			/*
 			 * This is a KERN_ERR so it appears on screen
 			 * for the user to see
 			 */
 			printk(KERN_ERR PFX "%s: No disk in drive\n",
 			       drive->name);
 			break;
 		case CAPACITY_INVALID:
 			printk(KERN_ERR PFX "%s: Invalid capacity for disk "
 				"in drive\n", drive->name);
 			break;
 		}
 		ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
 					     pc.buf[desc_start + 4] & 0x03);
 	}

 	/* Clik! disk does not support get_flexible_disk_page */
 	if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
 		(void) ide_floppy_get_flexible_disk_page(drive, &pc);

 	return rc;
 }

 static void ide_floppy_setup(ide_drive_t *drive)
 {
 	struct ide_disk_obj *floppy = drive->driver_data;
 	u16 *id = drive->id;

 	drive->pc_callback	 = ide_floppy_callback;

 	/*
 	 * We used to check revisions here. At this point however I'm giving up.
 	 * Just assume they are all broken, its easier.
 	 *
 	 * 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.
 	 */
 	if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
 		drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
 		/* This value will be visible in the /proc/ide/hdx/settings */
 		drive->pc_delay = IDEFLOPPY_PC_DELAY;
 		blk_queue_max_sectors(drive->queue, 64);
 	}

 	/*
 	 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
 	 * nasty clicking noises without it, so please don't remove this.
 	 */
 	if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
 		blk_queue_max_sectors(drive->queue, 64);
 		drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
 		/* IOMEGA Clik! drives do not support lock/unlock commands */
 		drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 	}

 	(void) ide_floppy_get_capacity(drive);

 	ide_proc_register_driver(drive, floppy->driver);

 	drive->dev_flags |= IDE_DFLAG_ATTACH;
 }

 static void ide_floppy_flush(ide_drive_t *drive)
 {
 }

 static int ide_floppy_init_media(ide_drive_t *drive, struct gendisk *disk)
 {
 	int ret = 0;

 	if (ide_do_test_unit_ready(drive, disk))
 		ide_do_start_stop(drive, disk, 1);

 	ret = ide_floppy_get_capacity(drive);

 	set_capacity(disk, ide_gd_capacity(drive));

 	return ret;
 }

 const struct ide_disk_ops ide_atapi_disk_ops = {
 	.check		= ide_check_atapi_device,
 	.get_capacity	= ide_floppy_get_capacity,
 	.setup		= ide_floppy_setup,
 	.flush		= ide_floppy_flush,
 	.init_media	= ide_floppy_init_media,
 	.set_doorlock	= ide_set_media_lock,
 	.do_request	= ide_floppy_do_request,
 	.ioctl		= ide_floppy_ioctl,
 };
	/*
	* 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/slab.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/irq.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)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	struct ide_atapi_pc *pc = drive->pc;
	struct request *rq = pc->rq;
	int uptodate = pc->error ? 0 : 1;

	ide_debug_log(IDE_DBG_FUNC, "enter");

	if (drive->failed_pc == pc)
	drive->failed_pc = NULL;

	if (pc->c[0] == GPCMD_READ_10 \|\| pc->c[0] == GPCMD_WRITE_10 \|\|
	(rq && blk_pc_request(rq)))
	uptodate = 1; /* FIXME */
	else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
	u8 *buf = pc->buf;

	if (!pc->error) {
	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 (drive->failed_pc)
	ide_debug_log(IDE_DBG_PC, "pc = %x",
	drive->failed_pc->c[0]);

	ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x,"
	"ascq = %x", floppy->sense_key,
	floppy->asc, floppy->ascq);
	} else
	printk(KERN_ERR PFX "Error in REQUEST SENSE itself - "
	"Aborting request!\n");
	}

	if (blk_special_request(rq))
	rq->errors = uptodate ? 0 : IDE_DRV_ERROR_GENERAL;

	return uptodate;
	}

	static void ide_floppy_report_error(struct ide_disk_obj *floppy,
	struct ide_atapi_pc *pc)
	{
	/* supress error messages resulting from Medium not present */
	if (floppy->sense_key == 0x02 &&
	floppy->asc == 0x3a &&
	floppy->ascq == 0x00)
	return;

	printk(KERN_ERR PFX "%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);

	}

	static ide_startstop_t ide_floppy_issue_pc(ide_drive_t *drive,
	struct ide_cmd *cmd,
	struct ide_atapi_pc *pc)
	{
	struct ide_disk_obj *floppy = drive->driver_data;

	if (drive->failed_pc == NULL &&
	pc->c[0] != GPCMD_REQUEST_SENSE)
	drive->failed_pc = pc;

	/* Set the current packet command */
	drive->pc = pc;

	if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
	unsigned int done = blk_rq_bytes(drive->hwif->rq);

	if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
	ide_floppy_report_error(floppy, pc);

	/* Giving up */
	pc->error = IDE_DRV_ERROR_GENERAL;

	drive->failed_pc = NULL;
	drive->pc_callback(drive, 0);
	ide_complete_rq(drive, -EIO, done);
	return ide_stopped;
	}

	ide_debug_log(IDE_DBG_FUNC, "retry #%d", pc->retries);

	pc->retries++;

	return ide_issue_pc(drive, cmd);
	}

	void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
	{
	ide_init_pc(pc);
	pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
	pc->c[7] = 255;
	pc->c[8] = 255;
	pc->req_xfer = 255;
	}

	/* A mode sense command is used to "sense" floppy parameters. */
	void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
	{
	u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */

	ide_init_pc(pc);
	pc->c[0] = GPCMD_MODE_SENSE_10;
	pc->c[1] = 0;
	pc->c[2] = page_code;

	switch (page_code) {
	case IDEFLOPPY_CAPABILITIES_PAGE:
	length += 12;
	break;
	case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
	length += 32;
	break;
	default:
	printk(KERN_ERR PFX "unsupported page code in %s\n", __func__);
	}
	put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
	pc->req_xfer = length;
	}

	static void idefloppy_create_rw_cmd(ide_drive_t *drive,
	struct ide_atapi_pc pc, struct request rq,
	unsigned long sector)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	int block = sector / floppy->bs_factor;
	int blocks = blk_rq_sectors(rq) / floppy->bs_factor;
	int cmd = rq_data_dir(rq);

	ide_debug_log(IDE_DBG_FUNC, "block: %d, blocks: %d", block, blocks);

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

	memcpy(rq->cmd, pc->c, 12);

	pc->rq = rq;
	if (rq->cmd_flags & REQ_RW)
	pc->flags \|= PC_FLAG_WRITING;
	pc->buf = NULL;
	pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
	pc->flags \|= PC_FLAG_DMA_OK;
	}

	static void idefloppy_blockpc_cmd(struct ide_disk_obj *floppy,
	struct ide_atapi_pc pc, struct request rq)
	{
	ide_init_pc(pc);
	memcpy(pc->c, rq->cmd, sizeof(pc->c));
	pc->rq = rq;
	if (blk_rq_bytes(rq)) {
	pc->flags \|= PC_FLAG_DMA_OK;
	if (rq_data_dir(rq) == WRITE)
	pc->flags \|= PC_FLAG_WRITING;
	}
	/* pio will be performed by ide_pio_bytes() which handles sg fine */
	pc->buf = NULL;
	pc->req_xfer = pc->buf_size = blk_rq_bytes(rq);
	}

	static ide_startstop_t ide_floppy_do_request(ide_drive_t *drive,
	struct request *rq, sector_t block)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	struct ide_cmd cmd;
	struct ide_atapi_pc *pc;

	ide_debug_log(IDE_DBG_FUNC, "enter, cmd: 0x%x\n", rq->cmd[0]);

	if (drive->debug_mask & IDE_DBG_RQ)
	blk_dump_rq_flags(rq, (rq->rq_disk
	? rq->rq_disk->disk_name
	: "dev?"));

	if (rq->errors >= ERROR_MAX) {
	if (drive->failed_pc) {
	ide_floppy_report_error(floppy, drive->failed_pc);
	drive->failed_pc = NULL;
	} else
	printk(KERN_ERR PFX "%s: I/O error\n", drive->name);

	if (blk_special_request(rq)) {
	rq->errors = 0;
	ide_complete_rq(drive, 0, blk_rq_bytes(rq));
	return ide_stopped;
	} else
	goto out_end;
	}
	if (blk_fs_request(rq)) {
	if (((long)blk_rq_pos(rq) % floppy->bs_factor) \|\|
	(blk_rq_sectors(rq) % floppy->bs_factor)) {
	printk(KERN_ERR PFX "%s: unsupported r/w rq size\n",
	drive->name);
	goto out_end;
	}
	pc = &floppy->queued_pc;
	idefloppy_create_rw_cmd(drive, pc, rq, (unsigned long)block);
	} else if (blk_special_request(rq) \|\| blk_sense_request(rq)) {
	pc = (struct ide_atapi_pc *)rq->special;
	} else if (blk_pc_request(rq)) {
	pc = &floppy->queued_pc;
	idefloppy_blockpc_cmd(floppy, pc, rq);
	} else {
	blk_dump_rq_flags(rq, PFX "unsupported command in queue");
	goto out_end;
	}

	ide_prep_sense(drive, rq);

	memset(&cmd, 0, sizeof(cmd));

	if (rq_data_dir(rq))
	cmd.tf_flags \|= IDE_TFLAG_WRITE;

	cmd.rq = rq;

	if (blk_fs_request(rq) \|\| pc->req_xfer) {
	ide_init_sg_cmd(&cmd, pc->req_xfer);
	ide_map_sg(drive, &cmd);
	}

	pc->rq = rq;

	return ide_floppy_issue_pc(drive, &cmd, pc);
	out_end:
	drive->failed_pc = NULL;
	if (blk_fs_request(rq) == 0 && rq->errors == 0)
	rq->errors = -EIO;
	ide_complete_rq(drive, -EIO, ide_rq_bytes(rq));
	return ide_stopped;
	}

	/*
	* Look at the flexible disk page parameters. We ignore the CHS capacity
	* parameters and use the LBA parameters instead.
	*/
	static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive,
	struct ide_atapi_pc *pc)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	struct gendisk *disk = floppy->disk;
	u8 *page;
	int capacity, lba_capacity;
	u16 transfer_rate, sector_size, cyls, rpm;
	u8 heads, sectors;

	ide_floppy_create_mode_sense_cmd(pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);

	if (ide_queue_pc_tail(drive, disk, pc)) {
	printk(KERN_ERR PFX "Can't get flexible disk page params\n");
	return 1;
	}

	if (pc->buf[3] & 0x80)
	drive->dev_flags \|= IDE_DFLAG_WP;
	else
	drive->dev_flags &= ~IDE_DFLAG_WP;

	set_disk_ro(disk, !!(drive->dev_flags & IDE_DFLAG_WP));

	page = &pc->buf[8];

	transfer_rate = be16_to_cpup((__be16 *)&pc->buf[8 + 2]);
	sector_size = be16_to_cpup((__be16 *)&pc->buf[8 + 6]);
	cyls = be16_to_cpup((__be16 *)&pc->buf[8 + 8]);
	rpm = be16_to_cpup((__be16 *)&pc->buf[8 + 28]);
	heads = pc->buf[8 + 4];
	sectors = pc->buf[8 + 5];

	capacity = cyls * heads * sectors * sector_size;

	if (memcmp(page, &floppy->flexible_disk_page, 32))
	printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, "
	"%d sector size, %d rpm\n",
	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;
	lba_capacity = floppy->blocks * floppy->block_size;

	if (capacity < lba_capacity) {
	printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d "
	"bytes, but the drive only handles %d\n",
	drive->name, lba_capacity, capacity);
	floppy->blocks = floppy->block_size ?
	capacity / floppy->block_size : 0;
	drive->capacity64 = floppy->blocks * floppy->bs_factor;
	}

	return 0;
	}

	/*
	* Determine if a media is present in the floppy drive, and if so, its LBA
	* capacity.
	*/
	static int ide_floppy_get_capacity(ide_drive_t *drive)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	struct gendisk *disk = floppy->disk;
	struct ide_atapi_pc pc;
	u8 *cap_desc;
	u8 pc_buf[256], header_len, desc_cnt;
	int i, rc = 1, blocks, length;

	ide_debug_log(IDE_DBG_FUNC, "enter");

	drive->bios_cyl = 0;
	drive->bios_head = drive->bios_sect = 0;
	floppy->blocks = 0;
	floppy->bs_factor = 1;
	drive->capacity64 = 0;

	ide_floppy_create_read_capacity_cmd(&pc);
	pc.buf = &pc_buf[0];
	pc.buf_size = sizeof(pc_buf);

	if (ide_queue_pc_tail(drive, disk, &pc)) {
	printk(KERN_ERR PFX "Can't get floppy parameters\n");
	return 1;
	}
	header_len = pc.buf[3];
	cap_desc = &pc.buf[4];
	desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */

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

	blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
	length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);

	ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, "
	"%d sector size",
	i, blocks * length / 1024,
	blocks, length);

	if (i)
	continue;
	/*
	* the code below is valid only for the 1st descriptor, ie i=0
	*/

	switch (pc.buf[desc_start + 4] & 0x03) {
	/* Clik! drive returns this instead of CAPACITY_CURRENT */
	case CAPACITY_UNFORMATTED:
	if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
	/*
	* If it is not a clik drive, break out
	* (maintains previous driver behaviour)
	*/
	break;
	case CAPACITY_CURRENT:
	/* Normal Zip/LS-120 disks */
	if (memcmp(cap_desc, &floppy->cap_desc, 8))
	printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d "
	"sector size\n",
	drive->name, blocks * length / 1024,
	blocks, length);
	memcpy(&floppy->cap_desc, cap_desc, 8);

	if (!length \|\| length % 512) {
	printk(KERN_NOTICE PFX "%s: %d bytes block size"
	" not supported\n", drive->name, length);
	} else {
	floppy->blocks = blocks;
	floppy->block_size = length;
	floppy->bs_factor = length / 512;
	if (floppy->bs_factor != 1)
	printk(KERN_NOTICE PFX "%s: Warning: "
	"non 512 bytes block size not "
	"fully supported\n",
	drive->name);
	drive->capacity64 =
	floppy->blocks * floppy->bs_factor;
	rc = 0;
	}
	break;
	case CAPACITY_NO_CARTRIDGE:
	/*
	* This is a KERN_ERR so it appears on screen
	* for the user to see
	*/
	printk(KERN_ERR PFX "%s: No disk in drive\n",
	drive->name);
	break;
	case CAPACITY_INVALID:
	printk(KERN_ERR PFX "%s: Invalid capacity for disk "
	"in drive\n", drive->name);
	break;
	}
	ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d",
	pc.buf[desc_start + 4] & 0x03);
	}

	/* Clik! disk does not support get_flexible_disk_page */
	if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
	(void) ide_floppy_get_flexible_disk_page(drive, &pc);

	return rc;
	}

	static void ide_floppy_setup(ide_drive_t *drive)
	{
	struct ide_disk_obj *floppy = drive->driver_data;
	u16 *id = drive->id;

	drive->pc_callback = ide_floppy_callback;

	/*
	* We used to check revisions here. At this point however I'm giving up.
	* Just assume they are all broken, its easier.
	*
	* 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.
	*/
	if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
	drive->atapi_flags \|= IDE_AFLAG_ZIP_DRIVE;
	/* This value will be visible in the /proc/ide/hdx/settings */
	drive->pc_delay = IDEFLOPPY_PC_DELAY;
	blk_queue_max_sectors(drive->queue, 64);
	}

	/*
	* Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
	* nasty clicking noises without it, so please don't remove this.
	*/
	if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
	blk_queue_max_sectors(drive->queue, 64);
	drive->atapi_flags \|= IDE_AFLAG_CLIK_DRIVE;
	/* IOMEGA Clik! drives do not support lock/unlock commands */
	drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
	}

	(void) ide_floppy_get_capacity(drive);

	ide_proc_register_driver(drive, floppy->driver);

	drive->dev_flags \|= IDE_DFLAG_ATTACH;
	}

	static void ide_floppy_flush(ide_drive_t *drive)
	{
	}

	static int ide_floppy_init_media(ide_drive_t drive, struct gendisk disk)
	{
	int ret = 0;

	if (ide_do_test_unit_ready(drive, disk))
	ide_do_start_stop(drive, disk, 1);

	ret = ide_floppy_get_capacity(drive);

	set_capacity(disk, ide_gd_capacity(drive));

	return ret;
	}

	const struct ide_disk_ops ide_atapi_disk_ops = {
	.check = ide_check_atapi_device,
	.get_capacity = ide_floppy_get_capacity,
	.setup = ide_floppy_setup,
	.flush = ide_floppy_flush,
	.init_media = ide_floppy_init_media,
	.set_doorlock = ide_set_media_lock,
	.do_request = ide_floppy_do_request,
	.ioctl = ide_floppy_ioctl,
	};