2 * IDE ATAPI floppy driver.
4 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il>
5 * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net>
6 * Copyright (C) 2005 Bartlomiej Zolnierkiewicz
8 * This driver supports the following IDE floppy drives:
10 * LS-120/240 SuperDisk
12 * Iomega PC Card Clik!/PocketZip
14 * For a historical changelog see
15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
18 #define DRV_NAME "ide-floppy"
20 #define IDEFLOPPY_VERSION "1.00"
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/string.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/timer.h>
29 #include <linux/interrupt.h>
30 #include <linux/major.h>
31 #include <linux/errno.h>
32 #include <linux/genhd.h>
33 #include <linux/slab.h>
34 #include <linux/cdrom.h>
35 #include <linux/ide.h>
36 #include <linux/hdreg.h>
37 #include <linux/bitops.h>
38 #include <linux/mutex.h>
39 #include <linux/scatterlist.h>
41 #include <scsi/scsi_ioctl.h>
43 #include <asm/byteorder.h>
44 #include <linux/irq.h>
45 #include <linux/uaccess.h>
47 #include <asm/unaligned.h>
49 #include "ide-floppy.h"
51 /* define to see debug info */
52 #define IDEFLOPPY_DEBUG_LOG 0
54 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
55 #define IDEFLOPPY_DEBUG(fmt, args...)
57 #if IDEFLOPPY_DEBUG_LOG
58 #define debug_log(fmt, args...) \
59 printk(KERN_INFO "ide-floppy: " fmt, ## args)
61 #define debug_log(fmt, args...) do {} while (0)
65 * After each failed packet command we issue a request sense command and retry
66 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
68 #define IDEFLOPPY_MAX_PC_RETRIES 3
70 /* format capacities descriptor codes */
71 #define CAPACITY_INVALID 0x00
72 #define CAPACITY_UNFORMATTED 0x01
73 #define CAPACITY_CURRENT 0x02
74 #define CAPACITY_NO_CARTRIDGE 0x03
77 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit
78 * was apparently being deasserted before the unit was ready to receive data.
80 #define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */
82 /* Error code returned in rq->errors to the higher part of the driver. */
83 #define IDEFLOPPY_ERROR_GENERAL 101
85 static DEFINE_MUTEX(idefloppy_ref_mutex);
87 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
89 #define ide_floppy_g(disk) \
90 container_of((disk)->private_data, struct ide_floppy_obj, driver)
92 static void idefloppy_cleanup_obj(struct kref *);
94 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
96 struct ide_floppy_obj *floppy = NULL;
98 mutex_lock(&idefloppy_ref_mutex);
99 floppy = ide_floppy_g(disk);
101 if (ide_device_get(floppy->drive))
104 kref_get(&floppy->kref);
106 mutex_unlock(&idefloppy_ref_mutex);
110 static void ide_floppy_put(struct ide_floppy_obj *floppy)
112 ide_drive_t *drive = floppy->drive;
114 mutex_lock(&idefloppy_ref_mutex);
115 kref_put(&floppy->kref, idefloppy_cleanup_obj);
116 ide_device_put(drive);
117 mutex_unlock(&idefloppy_ref_mutex);
121 * Used to finish servicing a request. For read/write requests, we will call
122 * ide_end_request to pass to the next buffer.
124 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
126 idefloppy_floppy_t *floppy = drive->driver_data;
127 struct request *rq = HWGROUP(drive)->rq;
130 debug_log("Reached %s\n", __func__);
133 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
134 case 1: error = 0; break;
135 default: error = uptodate;
138 floppy->failed_pc = NULL;
139 /* Why does this happen? */
142 if (!blk_special_request(rq)) {
143 /* our real local end request function */
144 ide_end_request(drive, uptodate, nsecs);
148 /* fixme: need to move this local also */
149 ide_end_drive_cmd(drive, 0, 0);
153 static void idefloppy_update_buffers(ide_drive_t *drive,
154 struct ide_atapi_pc *pc)
156 struct request *rq = pc->rq;
157 struct bio *bio = rq->bio;
159 while ((bio = rq->bio) != NULL)
160 idefloppy_end_request(drive, 1, 0);
163 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
165 idefloppy_floppy_t *floppy = drive->driver_data;
166 struct ide_atapi_pc *pc = drive->pc;
167 int uptodate = pc->error ? 0 : 1;
169 debug_log("Reached %s\n", __func__);
171 if (floppy->failed_pc == pc)
172 floppy->failed_pc = NULL;
174 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
175 (pc->rq && blk_pc_request(pc->rq)))
176 uptodate = 1; /* FIXME */
177 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
181 floppy->sense_key = buf[2] & 0x0F;
182 floppy->asc = buf[12];
183 floppy->ascq = buf[13];
184 floppy->progress_indication = buf[15] & 0x80 ?
185 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
187 if (floppy->failed_pc)
188 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
190 debug_log("sense key = %x, asc = %x, ascq = %x\n",
191 floppy->sense_key, floppy->asc, floppy->ascq);
193 printk(KERN_ERR "Error in REQUEST SENSE itself - "
194 "Aborting request!\n");
197 idefloppy_end_request(drive, uptodate, 0);
200 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
201 struct ide_atapi_pc *pc)
203 /* supress error messages resulting from Medium not present */
204 if (floppy->sense_key == 0x02 &&
205 floppy->asc == 0x3a &&
206 floppy->ascq == 0x00)
209 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
210 "asc = %2x, ascq = %2x\n",
211 floppy->drive->name, pc->c[0], floppy->sense_key,
212 floppy->asc, floppy->ascq);
216 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
217 struct ide_atapi_pc *pc)
219 idefloppy_floppy_t *floppy = drive->driver_data;
221 if (floppy->failed_pc == NULL &&
222 pc->c[0] != GPCMD_REQUEST_SENSE)
223 floppy->failed_pc = pc;
225 /* Set the current packet command */
228 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
229 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
230 ide_floppy_report_error(floppy, pc);
232 pc->error = IDEFLOPPY_ERROR_GENERAL;
234 floppy->failed_pc = NULL;
235 drive->pc_callback(drive, 0);
239 debug_log("Retry number - %d\n", pc->retries);
243 return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
246 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
249 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
255 /* A mode sense command is used to "sense" floppy parameters. */
256 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
258 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
261 pc->c[0] = GPCMD_MODE_SENSE_10;
263 pc->c[2] = page_code;
266 case IDEFLOPPY_CAPABILITIES_PAGE:
269 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
273 printk(KERN_ERR "ide-floppy: unsupported page code "
274 "in create_mode_sense_cmd\n");
276 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
277 pc->req_xfer = length;
280 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
281 struct ide_atapi_pc *pc, struct request *rq,
282 unsigned long sector)
284 int block = sector / floppy->bs_factor;
285 int blocks = rq->nr_sectors / floppy->bs_factor;
286 int cmd = rq_data_dir(rq);
288 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
292 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
293 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
294 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
296 memcpy(rq->cmd, pc->c, 12);
300 if (rq->cmd_flags & REQ_RW)
301 pc->flags |= PC_FLAG_WRITING;
303 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
304 pc->flags |= PC_FLAG_DMA_OK;
307 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
308 struct ide_atapi_pc *pc, struct request *rq)
311 memcpy(pc->c, rq->cmd, sizeof(pc->c));
314 if (rq->data_len && rq_data_dir(rq) == WRITE)
315 pc->flags |= PC_FLAG_WRITING;
318 pc->flags |= PC_FLAG_DMA_OK;
320 * possibly problematic, doesn't look like ide-floppy correctly
321 * handled scattered requests if dma fails...
323 pc->req_xfer = pc->buf_size = rq->data_len;
326 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
327 struct request *rq, sector_t block_s)
329 idefloppy_floppy_t *floppy = drive->driver_data;
330 ide_hwif_t *hwif = drive->hwif;
331 struct ide_atapi_pc *pc;
332 unsigned long block = (unsigned long)block_s;
334 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
335 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
336 rq->cmd[0], rq->cmd_type, rq->errors);
338 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
339 __func__, (long)rq->sector, rq->nr_sectors,
340 rq->current_nr_sectors);
342 if (rq->errors >= ERROR_MAX) {
343 if (floppy->failed_pc)
344 ide_floppy_report_error(floppy, floppy->failed_pc);
346 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
348 idefloppy_end_request(drive, 0, 0);
351 if (blk_fs_request(rq)) {
352 if (((long)rq->sector % floppy->bs_factor) ||
353 (rq->nr_sectors % floppy->bs_factor)) {
354 printk(KERN_ERR "%s: unsupported r/w request size\n",
356 idefloppy_end_request(drive, 0, 0);
359 pc = &floppy->queued_pc;
360 idefloppy_create_rw_cmd(floppy, pc, rq, block);
361 } else if (blk_special_request(rq)) {
362 pc = (struct ide_atapi_pc *) rq->buffer;
363 } else if (blk_pc_request(rq)) {
364 pc = &floppy->queued_pc;
365 idefloppy_blockpc_cmd(floppy, pc, rq);
367 blk_dump_rq_flags(rq,
368 "ide-floppy: unsupported command in queue");
369 idefloppy_end_request(drive, 0, 0);
373 ide_init_sg_cmd(drive, rq);
374 ide_map_sg(drive, rq);
376 pc->sg = hwif->sg_table;
377 pc->sg_cnt = hwif->sg_nents;
381 return idefloppy_issue_pc(drive, pc);
385 * Look at the flexible disk page parameters. We ignore the CHS capacity
386 * parameters and use the LBA parameters instead.
388 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
390 idefloppy_floppy_t *floppy = drive->driver_data;
391 struct gendisk *disk = floppy->disk;
392 struct ide_atapi_pc pc;
394 int capacity, lba_capacity;
395 u16 transfer_rate, sector_size, cyls, rpm;
398 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
400 if (ide_queue_pc_tail(drive, disk, &pc)) {
401 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
406 if (pc.buf[3] & 0x80)
407 drive->atapi_flags |= IDE_AFLAG_WP;
409 drive->atapi_flags &= ~IDE_AFLAG_WP;
411 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
415 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
416 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
417 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
418 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
419 heads = pc.buf[8 + 4];
420 sectors = pc.buf[8 + 5];
422 capacity = cyls * heads * sectors * sector_size;
424 if (memcmp(page, &floppy->flexible_disk_page, 32))
425 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
426 "%d sector size, %d rpm\n",
427 drive->name, capacity / 1024, cyls, heads,
428 sectors, transfer_rate / 8, sector_size, rpm);
430 memcpy(&floppy->flexible_disk_page, page, 32);
431 drive->bios_cyl = cyls;
432 drive->bios_head = heads;
433 drive->bios_sect = sectors;
434 lba_capacity = floppy->blocks * floppy->block_size;
436 if (capacity < lba_capacity) {
437 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
438 "bytes, but the drive only handles %d\n",
439 drive->name, lba_capacity, capacity);
440 floppy->blocks = floppy->block_size ?
441 capacity / floppy->block_size : 0;
447 * Determine if a media is present in the floppy drive, and if so, its LBA
450 static int ide_floppy_get_capacity(ide_drive_t *drive)
452 idefloppy_floppy_t *floppy = drive->driver_data;
453 struct gendisk *disk = floppy->disk;
454 struct ide_atapi_pc pc;
456 u8 header_len, desc_cnt;
457 int i, rc = 1, blocks, length;
460 drive->bios_head = drive->bios_sect = 0;
462 floppy->bs_factor = 1;
463 set_capacity(floppy->disk, 0);
465 ide_floppy_create_read_capacity_cmd(&pc);
466 if (ide_queue_pc_tail(drive, disk, &pc)) {
467 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
470 header_len = pc.buf[3];
471 cap_desc = &pc.buf[4];
472 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
474 for (i = 0; i < desc_cnt; i++) {
475 unsigned int desc_start = 4 + i*8;
477 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
478 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
480 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
481 i, blocks * length / 1024, blocks, length);
486 * the code below is valid only for the 1st descriptor, ie i=0
489 switch (pc.buf[desc_start + 4] & 0x03) {
490 /* Clik! drive returns this instead of CAPACITY_CURRENT */
491 case CAPACITY_UNFORMATTED:
492 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
494 * If it is not a clik drive, break out
495 * (maintains previous driver behaviour)
498 case CAPACITY_CURRENT:
499 /* Normal Zip/LS-120 disks */
500 if (memcmp(cap_desc, &floppy->cap_desc, 8))
501 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
502 "sector size\n", drive->name,
503 blocks * length / 1024, blocks, length);
504 memcpy(&floppy->cap_desc, cap_desc, 8);
506 if (!length || length % 512) {
507 printk(KERN_NOTICE "%s: %d bytes block size "
508 "not supported\n", drive->name, length);
510 floppy->blocks = blocks;
511 floppy->block_size = length;
512 floppy->bs_factor = length / 512;
513 if (floppy->bs_factor != 1)
514 printk(KERN_NOTICE "%s: warning: non "
515 "512 bytes block size not "
521 case CAPACITY_NO_CARTRIDGE:
523 * This is a KERN_ERR so it appears on screen
524 * for the user to see
526 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
528 case CAPACITY_INVALID:
529 printk(KERN_ERR "%s: Invalid capacity for disk "
530 "in drive\n", drive->name);
533 debug_log("Descriptor 0 Code: %d\n",
534 pc.buf[desc_start + 4] & 0x03);
537 /* Clik! disk does not support get_flexible_disk_page */
538 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
539 (void) ide_floppy_get_flexible_disk_page(drive);
541 set_capacity(disk, floppy->blocks * floppy->bs_factor);
546 static sector_t idefloppy_capacity(ide_drive_t *drive)
548 idefloppy_floppy_t *floppy = drive->driver_data;
549 unsigned long capacity = floppy->blocks * floppy->bs_factor;
554 #ifdef CONFIG_IDE_PROC_FS
555 ide_devset_rw_field(bios_cyl, bios_cyl);
556 ide_devset_rw_field(bios_head, bios_head);
557 ide_devset_rw_field(bios_sect, bios_sect);
558 ide_devset_rw_field(ticks, pc_delay);
560 static const struct ide_proc_devset idefloppy_settings[] = {
561 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
562 IDE_PROC_DEVSET(bios_head, 0, 255),
563 IDE_PROC_DEVSET(bios_sect, 0, 63),
564 IDE_PROC_DEVSET(ticks, 0, 255),
569 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
574 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
576 drive->pc_callback = ide_floppy_callback;
577 drive->pc_update_buffers = idefloppy_update_buffers;
578 drive->pc_io_buffers = ide_io_buffers;
580 if (((gcw[0] & 0x60) >> 5) == 1)
581 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
583 * We used to check revisions here. At this point however I'm giving up.
584 * Just assume they are all broken, its easier.
586 * The actual reason for the workarounds was likely a driver bug after
587 * all rather than a firmware bug, and the workaround below used to hide
588 * it. It should be fixed as of version 1.9, but to be on the safe side
589 * we'll leave the limitation below for the 2.2.x tree.
591 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
592 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
593 /* This value will be visible in the /proc/ide/hdx/settings */
594 drive->pc_delay = IDEFLOPPY_PC_DELAY;
595 blk_queue_max_sectors(drive->queue, 64);
599 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
600 * nasty clicking noises without it, so please don't remove this.
602 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
603 blk_queue_max_sectors(drive->queue, 64);
604 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
605 /* IOMEGA Clik! drives do not support lock/unlock commands */
606 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
609 (void) ide_floppy_get_capacity(drive);
611 ide_proc_register_driver(drive, floppy->driver);
614 static void ide_floppy_remove(ide_drive_t *drive)
616 idefloppy_floppy_t *floppy = drive->driver_data;
617 struct gendisk *g = floppy->disk;
619 ide_proc_unregister_driver(drive, floppy->driver);
623 ide_floppy_put(floppy);
626 static void idefloppy_cleanup_obj(struct kref *kref)
628 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
629 ide_drive_t *drive = floppy->drive;
630 struct gendisk *g = floppy->disk;
632 drive->driver_data = NULL;
633 g->private_data = NULL;
638 #ifdef CONFIG_IDE_PROC_FS
639 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
640 int count, int *eof, void *data)
642 ide_drive_t*drive = (ide_drive_t *)data;
645 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
646 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
649 static ide_proc_entry_t idefloppy_proc[] = {
650 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
651 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
652 { NULL, 0, NULL, NULL }
654 #endif /* CONFIG_IDE_PROC_FS */
656 static int ide_floppy_probe(ide_drive_t *);
658 static ide_driver_t idefloppy_driver = {
660 .owner = THIS_MODULE,
661 .name = "ide-floppy",
662 .bus = &ide_bus_type,
664 .probe = ide_floppy_probe,
665 .remove = ide_floppy_remove,
666 .version = IDEFLOPPY_VERSION,
668 .do_request = idefloppy_do_request,
669 .end_request = idefloppy_end_request,
670 .error = __ide_error,
671 #ifdef CONFIG_IDE_PROC_FS
672 .proc = idefloppy_proc,
673 .settings = idefloppy_settings,
677 static int idefloppy_open(struct inode *inode, struct file *filp)
679 struct gendisk *disk = inode->i_bdev->bd_disk;
680 struct ide_floppy_obj *floppy;
684 debug_log("Reached %s\n", __func__);
686 floppy = ide_floppy_get(disk);
690 drive = floppy->drive;
694 if (floppy->openers == 1) {
695 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
698 if (ide_do_test_unit_ready(drive, disk))
699 ide_do_start_stop(drive, disk, 1);
701 if (ide_floppy_get_capacity(drive)
702 && (filp->f_flags & O_NDELAY) == 0
704 * Allow O_NDELAY to open a drive without a disk, or with an
705 * unreadable disk, so that we can get the format capacity
706 * of the drive or begin the format - Sam
713 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
718 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
719 ide_set_media_lock(drive, disk, 1);
720 check_disk_change(inode->i_bdev);
721 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
729 ide_floppy_put(floppy);
733 static int idefloppy_release(struct inode *inode, struct file *filp)
735 struct gendisk *disk = inode->i_bdev->bd_disk;
736 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
737 ide_drive_t *drive = floppy->drive;
739 debug_log("Reached %s\n", __func__);
741 if (floppy->openers == 1) {
742 ide_set_media_lock(drive, disk, 0);
743 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
748 ide_floppy_put(floppy);
753 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
755 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
756 ide_drive_t *drive = floppy->drive;
758 geo->heads = drive->bios_head;
759 geo->sectors = drive->bios_sect;
760 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
764 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
765 unsigned long arg, unsigned int cmd)
767 idefloppy_floppy_t *floppy = drive->driver_data;
768 struct gendisk *disk = floppy->disk;
769 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
771 if (floppy->openers > 1)
774 ide_set_media_lock(drive, disk, prevent);
776 if (cmd == CDROMEJECT)
777 ide_do_start_stop(drive, disk, 2);
782 static int idefloppy_ioctl(struct inode *inode, struct file *file,
783 unsigned int cmd, unsigned long arg)
785 struct block_device *bdev = inode->i_bdev;
786 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
787 ide_drive_t *drive = floppy->drive;
788 struct ide_atapi_pc pc;
789 void __user *argp = (void __user *)arg;
792 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
793 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
795 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
800 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
801 * and CDROM_SEND_PACKET (legacy) ioctls
803 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
804 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
805 bdev->bd_disk, cmd, argp);
808 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
813 static int idefloppy_media_changed(struct gendisk *disk)
815 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
816 ide_drive_t *drive = floppy->drive;
819 /* do not scan partitions twice if this is a removable device */
824 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
825 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
829 static int idefloppy_revalidate_disk(struct gendisk *disk)
831 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
832 set_capacity(disk, idefloppy_capacity(floppy->drive));
836 static struct block_device_operations idefloppy_ops = {
837 .owner = THIS_MODULE,
838 .open = idefloppy_open,
839 .release = idefloppy_release,
840 .ioctl = idefloppy_ioctl,
841 .getgeo = idefloppy_getgeo,
842 .media_changed = idefloppy_media_changed,
843 .revalidate_disk = idefloppy_revalidate_disk
846 static int ide_floppy_probe(ide_drive_t *drive)
848 idefloppy_floppy_t *floppy;
851 if (!strstr("ide-floppy", drive->driver_req))
854 if (drive->media != ide_floppy)
857 if (!ide_check_atapi_device(drive, DRV_NAME)) {
858 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
859 " of ide-floppy\n", drive->name);
862 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
864 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
865 " structure\n", drive->name);
869 g = alloc_disk(1 << PARTN_BITS);
871 goto out_free_floppy;
873 ide_init_disk(g, drive);
875 kref_init(&floppy->kref);
877 floppy->drive = drive;
878 floppy->driver = &idefloppy_driver;
881 g->private_data = &floppy->driver;
883 drive->driver_data = floppy;
885 idefloppy_setup(drive, floppy);
887 g->minors = 1 << PARTN_BITS;
888 g->driverfs_dev = &drive->gendev;
889 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
890 g->fops = &idefloppy_ops;
901 static void __exit idefloppy_exit(void)
903 driver_unregister(&idefloppy_driver.gen_driver);
906 static int __init idefloppy_init(void)
908 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
909 return driver_register(&idefloppy_driver.gen_driver);
912 MODULE_ALIAS("ide:*m-floppy*");
913 MODULE_ALIAS("ide-floppy");
914 module_init(idefloppy_init);
915 module_exit(idefloppy_exit);
916 MODULE_LICENSE("GPL");
917 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");