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5aeddf907f
Introduce to_ide_drv() and ide_drv_g() macros and replace the respective definitions of similar ones in each driver. There should be no functionality change resulting from this patch. Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
916 lines
24 KiB
C
916 lines
24 KiB
C
/*
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* IDE ATAPI floppy driver.
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*
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* Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
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* Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
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* Copyright (C) 2005 Bartlomiej Zolnierkiewicz
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*
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* This driver supports the following IDE floppy drives:
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*
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* LS-120/240 SuperDisk
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* Iomega Zip 100/250
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* Iomega PC Card Clik!/PocketZip
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*
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* For a historical changelog see
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* Documentation/ide/ChangeLog.ide-floppy.1996-2002
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*/
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#define DRV_NAME "ide-floppy"
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#define IDEFLOPPY_VERSION "1.00"
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/genhd.h>
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#include <linux/slab.h>
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#include <linux/cdrom.h>
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#include <linux/ide.h>
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#include <linux/hdreg.h>
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#include <linux/bitops.h>
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#include <linux/mutex.h>
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#include <linux/scatterlist.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>
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#include <linux/uaccess.h>
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#include <linux/io.h>
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#include <asm/unaligned.h>
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#include "ide-floppy.h"
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/* define to see debug info */
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#define IDEFLOPPY_DEBUG_LOG 0
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/* #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...) \
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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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/*
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* After each failed packet command we issue a request sense command and retry
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* the packet command IDEFLOPPY_MAX_PC_RETRIES times.
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*/
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#define IDEFLOPPY_MAX_PC_RETRIES 3
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/* format capacities descriptor codes */
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#define CAPACITY_INVALID 0x00
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#define CAPACITY_UNFORMATTED 0x01
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#define CAPACITY_CURRENT 0x02
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#define CAPACITY_NO_CARTRIDGE 0x03
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/*
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* The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
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* was apparently being deasserted before the unit was ready to receive data.
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*/
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#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
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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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static DEFINE_MUTEX(idefloppy_ref_mutex);
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static void idefloppy_cleanup_obj(struct kref *);
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static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
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{
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struct ide_floppy_obj *floppy = NULL;
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mutex_lock(&idefloppy_ref_mutex);
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floppy = ide_drv_g(disk, ide_floppy_obj);
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if (floppy) {
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if (ide_device_get(floppy->drive))
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floppy = NULL;
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else
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kref_get(&floppy->kref);
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}
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mutex_unlock(&idefloppy_ref_mutex);
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return floppy;
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}
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static void ide_floppy_put(struct ide_floppy_obj *floppy)
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{
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ide_drive_t *drive = floppy->drive;
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mutex_lock(&idefloppy_ref_mutex);
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kref_put(&floppy->kref, idefloppy_cleanup_obj);
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ide_device_put(drive);
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mutex_unlock(&idefloppy_ref_mutex);
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}
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/*
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* Used to finish servicing a request. For read/write requests, we will call
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* 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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{
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idefloppy_floppy_t *floppy = drive->driver_data;
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struct request *rq = HWGROUP(drive)->rq;
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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;
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case 1: error = 0; break;
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default: error = uptodate;
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}
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if (error)
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floppy->failed_pc = NULL;
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/* Why does this happen? */
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if (!rq)
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return 0;
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if (!blk_special_request(rq)) {
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/* our real local end request function */
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ide_end_request(drive, uptodate, nsecs);
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return 0;
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}
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rq->errors = error;
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/* fixme: need to move this local also */
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ide_end_drive_cmd(drive, 0, 0);
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return 0;
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}
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static void idefloppy_update_buffers(ide_drive_t *drive,
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struct ide_atapi_pc *pc)
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{
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struct request *rq = pc->rq;
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struct bio *bio = rq->bio;
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while ((bio = rq->bio) != NULL)
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idefloppy_end_request(drive, 1, 0);
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}
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static void ide_floppy_callback(ide_drive_t *drive, int dsc)
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{
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idefloppy_floppy_t *floppy = drive->driver_data;
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struct ide_atapi_pc *pc = drive->pc;
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int uptodate = pc->error ? 0 : 1;
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debug_log("Reached %s\n", __func__);
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if (floppy->failed_pc == pc)
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floppy->failed_pc = NULL;
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if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
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(pc->rq && blk_pc_request(pc->rq)))
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uptodate = 1; /* FIXME */
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else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
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u8 *buf = pc->buf;
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if (!pc->error) {
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floppy->sense_key = buf[2] & 0x0F;
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floppy->asc = buf[12];
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floppy->ascq = buf[13];
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floppy->progress_indication = buf[15] & 0x80 ?
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(u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
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if (floppy->failed_pc)
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debug_log("pc = %x, ", floppy->failed_pc->c[0]);
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debug_log("sense key = %x, asc = %x, ascq = %x\n",
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floppy->sense_key, floppy->asc, floppy->ascq);
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} else
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printk(KERN_ERR "Error in REQUEST SENSE itself - "
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"Aborting request!\n");
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}
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idefloppy_end_request(drive, uptodate, 0);
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}
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static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
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struct ide_atapi_pc *pc)
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{
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/* supress error messages resulting from Medium not present */
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if (floppy->sense_key == 0x02 &&
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floppy->asc == 0x3a &&
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floppy->ascq == 0x00)
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return;
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printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
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"asc = %2x, ascq = %2x\n",
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floppy->drive->name, pc->c[0], floppy->sense_key,
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floppy->asc, floppy->ascq);
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}
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static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
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struct ide_atapi_pc *pc)
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{
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idefloppy_floppy_t *floppy = drive->driver_data;
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if (floppy->failed_pc == NULL &&
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pc->c[0] != GPCMD_REQUEST_SENSE)
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floppy->failed_pc = pc;
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/* Set the current packet command */
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drive->pc = pc;
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if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
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if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
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ide_floppy_report_error(floppy, pc);
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/* Giving up */
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pc->error = IDEFLOPPY_ERROR_GENERAL;
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floppy->failed_pc = NULL;
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drive->pc_callback(drive, 0);
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return ide_stopped;
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}
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debug_log("Retry number - %d\n", pc->retries);
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pc->retries++;
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return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
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}
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void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
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{
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ide_init_pc(pc);
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pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
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pc->c[7] = 255;
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pc->c[8] = 255;
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pc->req_xfer = 255;
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}
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/* A mode sense command is used to "sense" floppy parameters. */
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void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
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{
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u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
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ide_init_pc(pc);
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pc->c[0] = GPCMD_MODE_SENSE_10;
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pc->c[1] = 0;
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pc->c[2] = page_code;
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switch (page_code) {
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case IDEFLOPPY_CAPABILITIES_PAGE:
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length += 12;
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break;
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case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
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length += 32;
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break;
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default:
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printk(KERN_ERR "ide-floppy: unsupported page code "
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"in create_mode_sense_cmd\n");
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}
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put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
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pc->req_xfer = length;
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}
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static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
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struct ide_atapi_pc *pc, struct request *rq,
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unsigned long sector)
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{
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int block = sector / floppy->bs_factor;
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int blocks = rq->nr_sectors / floppy->bs_factor;
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int cmd = rq_data_dir(rq);
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debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
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block, blocks);
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ide_init_pc(pc);
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pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
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put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
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put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
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memcpy(rq->cmd, pc->c, 12);
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pc->rq = rq;
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pc->b_count = 0;
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if (rq->cmd_flags & REQ_RW)
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pc->flags |= PC_FLAG_WRITING;
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pc->buf = NULL;
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pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
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pc->flags |= PC_FLAG_DMA_OK;
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}
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static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
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struct ide_atapi_pc *pc, struct request *rq)
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{
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ide_init_pc(pc);
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memcpy(pc->c, rq->cmd, sizeof(pc->c));
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pc->rq = rq;
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pc->b_count = 0;
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if (rq->data_len && rq_data_dir(rq) == WRITE)
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pc->flags |= PC_FLAG_WRITING;
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pc->buf = rq->data;
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if (rq->bio)
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pc->flags |= PC_FLAG_DMA_OK;
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/*
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* possibly problematic, doesn't look like ide-floppy correctly
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* handled scattered requests if dma fails...
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*/
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pc->req_xfer = pc->buf_size = rq->data_len;
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}
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static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
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struct request *rq, sector_t block_s)
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{
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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;
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unsigned long block = (unsigned long)block_s;
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debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
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__func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
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rq->cmd[0], rq->cmd_type, rq->errors);
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debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
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__func__, (long)rq->sector, rq->nr_sectors,
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rq->current_nr_sectors);
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if (rq->errors >= ERROR_MAX) {
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if (floppy->failed_pc)
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ide_floppy_report_error(floppy, floppy->failed_pc);
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else
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printk(KERN_ERR "ide-floppy: %s: I/O error\n",
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drive->name);
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idefloppy_end_request(drive, 0, 0);
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return ide_stopped;
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}
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if (blk_fs_request(rq)) {
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if (((long)rq->sector % floppy->bs_factor) ||
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(rq->nr_sectors % floppy->bs_factor)) {
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printk(KERN_ERR "%s: unsupported r/w request size\n",
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drive->name);
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idefloppy_end_request(drive, 0, 0);
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return ide_stopped;
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}
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pc = &floppy->queued_pc;
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idefloppy_create_rw_cmd(floppy, pc, rq, block);
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} else if (blk_special_request(rq)) {
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pc = (struct ide_atapi_pc *) rq->buffer;
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} else if (blk_pc_request(rq)) {
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pc = &floppy->queued_pc;
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idefloppy_blockpc_cmd(floppy, pc, rq);
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} else {
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blk_dump_rq_flags(rq,
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"ide-floppy: unsupported command in queue");
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idefloppy_end_request(drive, 0, 0);
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return ide_stopped;
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}
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ide_init_sg_cmd(drive, rq);
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ide_map_sg(drive, rq);
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pc->sg = hwif->sg_table;
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pc->sg_cnt = hwif->sg_nents;
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pc->rq = rq;
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return idefloppy_issue_pc(drive, pc);
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}
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/*
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* Look at the flexible disk page parameters. We ignore the CHS capacity
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* parameters and use the LBA parameters instead.
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*/
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static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
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{
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idefloppy_floppy_t *floppy = drive->driver_data;
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struct gendisk *disk = floppy->disk;
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struct ide_atapi_pc pc;
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u8 *page;
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int capacity, lba_capacity;
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u16 transfer_rate, sector_size, cyls, rpm;
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u8 heads, sectors;
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ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
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if (ide_queue_pc_tail(drive, disk, &pc)) {
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printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
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" parameters\n");
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return 1;
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}
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if (pc.buf[3] & 0x80)
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drive->atapi_flags |= IDE_AFLAG_WP;
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else
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drive->atapi_flags &= ~IDE_AFLAG_WP;
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set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
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page = &pc.buf[8];
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transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
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sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
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cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
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rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
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heads = pc.buf[8 + 4];
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sectors = pc.buf[8 + 5];
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capacity = cyls * heads * sectors * sector_size;
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if (memcmp(page, &floppy->flexible_disk_page, 32))
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printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
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"%d sector size, %d rpm\n",
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drive->name, capacity / 1024, cyls, heads,
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sectors, transfer_rate / 8, sector_size, rpm);
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memcpy(&floppy->flexible_disk_page, page, 32);
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drive->bios_cyl = cyls;
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drive->bios_head = heads;
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drive->bios_sect = sectors;
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lba_capacity = floppy->blocks * floppy->block_size;
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if (capacity < lba_capacity) {
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printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
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"bytes, but the drive only handles %d\n",
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drive->name, lba_capacity, capacity);
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floppy->blocks = floppy->block_size ?
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capacity / floppy->block_size : 0;
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}
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return 0;
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}
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/*
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* Determine if a media is present in the floppy drive, and if so, its LBA
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* capacity.
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*/
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static int ide_floppy_get_capacity(ide_drive_t *drive)
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{
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idefloppy_floppy_t *floppy = drive->driver_data;
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struct gendisk *disk = floppy->disk;
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struct ide_atapi_pc pc;
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u8 *cap_desc;
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u8 header_len, desc_cnt;
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int i, rc = 1, blocks, length;
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drive->bios_cyl = 0;
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drive->bios_head = drive->bios_sect = 0;
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floppy->blocks = 0;
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floppy->bs_factor = 1;
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set_capacity(floppy->disk, 0);
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ide_floppy_create_read_capacity_cmd(&pc);
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if (ide_queue_pc_tail(drive, disk, &pc)) {
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printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
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return 1;
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}
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header_len = pc.buf[3];
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cap_desc = &pc.buf[4];
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desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
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for (i = 0; i < desc_cnt; i++) {
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unsigned int desc_start = 4 + i*8;
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blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
|
|
length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
|
|
|
|
debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
|
|
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 "%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 "%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 "%s: warning: non "
|
|
"512 bytes block size not "
|
|
"fully supported\n",
|
|
drive->name);
|
|
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 "%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;
|
|
}
|
|
debug_log("Descriptor 0 Code: %d\n",
|
|
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);
|
|
|
|
set_capacity(disk, floppy->blocks * floppy->bs_factor);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static sector_t idefloppy_capacity(ide_drive_t *drive)
|
|
{
|
|
idefloppy_floppy_t *floppy = drive->driver_data;
|
|
unsigned long capacity = floppy->blocks * floppy->bs_factor;
|
|
|
|
return capacity;
|
|
}
|
|
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
ide_devset_rw_field(bios_cyl, bios_cyl);
|
|
ide_devset_rw_field(bios_head, bios_head);
|
|
ide_devset_rw_field(bios_sect, bios_sect);
|
|
ide_devset_rw_field(ticks, pc_delay);
|
|
|
|
static const struct ide_proc_devset idefloppy_settings[] = {
|
|
IDE_PROC_DEVSET(bios_cyl, 0, 1023),
|
|
IDE_PROC_DEVSET(bios_head, 0, 255),
|
|
IDE_PROC_DEVSET(bios_sect, 0, 63),
|
|
IDE_PROC_DEVSET(ticks, 0, 255),
|
|
{ 0 },
|
|
};
|
|
#endif
|
|
|
|
static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
|
|
{
|
|
u16 *id = drive->id;
|
|
u8 gcw[2];
|
|
|
|
*((u16 *)&gcw) = id[ATA_ID_CONFIG];
|
|
|
|
drive->pc_callback = ide_floppy_callback;
|
|
drive->pc_update_buffers = idefloppy_update_buffers;
|
|
drive->pc_io_buffers = ide_io_buffers;
|
|
|
|
if (((gcw[0] & 0x60) >> 5) == 1)
|
|
drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
|
|
/*
|
|
* 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->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
|
|
}
|
|
|
|
(void) ide_floppy_get_capacity(drive);
|
|
|
|
ide_proc_register_driver(drive, floppy->driver);
|
|
}
|
|
|
|
static void ide_floppy_remove(ide_drive_t *drive)
|
|
{
|
|
idefloppy_floppy_t *floppy = drive->driver_data;
|
|
struct gendisk *g = floppy->disk;
|
|
|
|
ide_proc_unregister_driver(drive, floppy->driver);
|
|
|
|
del_gendisk(g);
|
|
|
|
ide_floppy_put(floppy);
|
|
}
|
|
|
|
static void idefloppy_cleanup_obj(struct kref *kref)
|
|
{
|
|
struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj);
|
|
ide_drive_t *drive = floppy->drive;
|
|
struct gendisk *g = floppy->disk;
|
|
|
|
drive->driver_data = NULL;
|
|
g->private_data = NULL;
|
|
put_disk(g);
|
|
kfree(floppy);
|
|
}
|
|
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
|
|
int count, int *eof, void *data)
|
|
{
|
|
ide_drive_t*drive = (ide_drive_t *)data;
|
|
int len;
|
|
|
|
len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
|
|
PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
|
|
}
|
|
|
|
static ide_proc_entry_t idefloppy_proc[] = {
|
|
{ "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
|
|
{ "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
|
|
{ NULL, 0, NULL, NULL }
|
|
};
|
|
#endif /* CONFIG_IDE_PROC_FS */
|
|
|
|
static int ide_floppy_probe(ide_drive_t *);
|
|
|
|
static ide_driver_t idefloppy_driver = {
|
|
.gen_driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ide-floppy",
|
|
.bus = &ide_bus_type,
|
|
},
|
|
.probe = ide_floppy_probe,
|
|
.remove = ide_floppy_remove,
|
|
.version = IDEFLOPPY_VERSION,
|
|
.media = ide_floppy,
|
|
.do_request = idefloppy_do_request,
|
|
.end_request = idefloppy_end_request,
|
|
.error = __ide_error,
|
|
#ifdef CONFIG_IDE_PROC_FS
|
|
.proc = idefloppy_proc,
|
|
.settings = idefloppy_settings,
|
|
#endif
|
|
};
|
|
|
|
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;
|
|
int ret = 0;
|
|
|
|
debug_log("Reached %s\n", __func__);
|
|
|
|
floppy = ide_floppy_get(disk);
|
|
if (!floppy)
|
|
return -ENXIO;
|
|
|
|
drive = floppy->drive;
|
|
|
|
floppy->openers++;
|
|
|
|
if (floppy->openers == 1) {
|
|
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
|
|
/* Just in case */
|
|
|
|
if (ide_do_test_unit_ready(drive, disk))
|
|
ide_do_start_stop(drive, disk, 1);
|
|
|
|
if (ide_floppy_get_capacity(drive)
|
|
&& (filp->f_flags & O_NDELAY) == 0
|
|
/*
|
|
* 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
|
|
*/
|
|
) {
|
|
ret = -EIO;
|
|
goto out_put_floppy;
|
|
}
|
|
|
|
if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
|
|
ret = -EROFS;
|
|
goto out_put_floppy;
|
|
}
|
|
|
|
drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
|
|
ide_set_media_lock(drive, disk, 1);
|
|
check_disk_change(inode->i_bdev);
|
|
} else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
|
|
ret = -EBUSY;
|
|
goto out_put_floppy;
|
|
}
|
|
return 0;
|
|
|
|
out_put_floppy:
|
|
floppy->openers--;
|
|
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_drv_g(disk, ide_floppy_obj);
|
|
ide_drive_t *drive = floppy->drive;
|
|
|
|
debug_log("Reached %s\n", __func__);
|
|
|
|
if (floppy->openers == 1) {
|
|
ide_set_media_lock(drive, disk, 0);
|
|
drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
|
|
}
|
|
|
|
floppy->openers--;
|
|
|
|
ide_floppy_put(floppy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
{
|
|
struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
|
|
ide_floppy_obj);
|
|
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;
|
|
}
|
|
|
|
static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
|
|
unsigned long arg, unsigned int cmd)
|
|
{
|
|
idefloppy_floppy_t *floppy = drive->driver_data;
|
|
struct gendisk *disk = floppy->disk;
|
|
int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
|
|
|
|
if (floppy->openers > 1)
|
|
return -EBUSY;
|
|
|
|
ide_set_media_lock(drive, disk, prevent);
|
|
|
|
if (cmd == CDROMEJECT)
|
|
ide_do_start_stop(drive, disk, 2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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_drv_g(bdev->bd_disk,
|
|
ide_floppy_obj);
|
|
ide_drive_t *drive = floppy->drive;
|
|
struct ide_atapi_pc pc;
|
|
void __user *argp = (void __user *)arg;
|
|
int err;
|
|
|
|
if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
|
|
return ide_floppy_lockdoor(drive, &pc, arg, cmd);
|
|
|
|
err = ide_floppy_format_ioctl(drive, file, cmd, argp);
|
|
if (err != -ENOTTY)
|
|
return err;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
if (err == -ENOTTY)
|
|
err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int idefloppy_media_changed(struct gendisk *disk)
|
|
{
|
|
struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
|
|
ide_drive_t *drive = floppy->drive;
|
|
int ret;
|
|
|
|
/* do not scan partitions twice if this is a removable device */
|
|
if (drive->attach) {
|
|
drive->attach = 0;
|
|
return 0;
|
|
}
|
|
ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
|
|
drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
|
|
return ret;
|
|
}
|
|
|
|
static int idefloppy_revalidate_disk(struct gendisk *disk)
|
|
{
|
|
struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
|
|
set_capacity(disk, idefloppy_capacity(floppy->drive));
|
|
return 0;
|
|
}
|
|
|
|
static struct block_device_operations idefloppy_ops = {
|
|
.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
|
|
};
|
|
|
|
static int ide_floppy_probe(ide_drive_t *drive)
|
|
{
|
|
idefloppy_floppy_t *floppy;
|
|
struct gendisk *g;
|
|
|
|
if (!strstr("ide-floppy", drive->driver_req))
|
|
goto failed;
|
|
|
|
if (drive->media != ide_floppy)
|
|
goto failed;
|
|
|
|
if (!ide_check_atapi_device(drive, DRV_NAME)) {
|
|
printk(KERN_ERR "ide-floppy: %s: not supported by this version"
|
|
" of ide-floppy\n", drive->name);
|
|
goto failed;
|
|
}
|
|
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);
|
|
goto failed;
|
|
}
|
|
|
|
g = alloc_disk(1 << PARTN_BITS);
|
|
if (!g)
|
|
goto out_free_floppy;
|
|
|
|
ide_init_disk(g, drive);
|
|
|
|
kref_init(&floppy->kref);
|
|
|
|
floppy->drive = drive;
|
|
floppy->driver = &idefloppy_driver;
|
|
floppy->disk = g;
|
|
|
|
g->private_data = &floppy->driver;
|
|
|
|
drive->driver_data = floppy;
|
|
|
|
idefloppy_setup(drive, floppy);
|
|
|
|
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:
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __exit idefloppy_exit(void)
|
|
{
|
|
driver_unregister(&idefloppy_driver.gen_driver);
|
|
}
|
|
|
|
static int __init idefloppy_init(void)
|
|
{
|
|
printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
|
|
return driver_register(&idefloppy_driver.gen_driver);
|
|
}
|
|
|
|
MODULE_ALIAS("ide:*m-floppy*");
|
|
MODULE_ALIAS("ide-floppy");
|
|
module_init(idefloppy_init);
|
|
module_exit(idefloppy_exit);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
|
|
|