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 static void idefloppy_cleanup_obj(struct kref *);
89 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
91 struct ide_floppy_obj *floppy = NULL;
93 mutex_lock(&idefloppy_ref_mutex);
94 floppy = ide_drv_g(disk, ide_floppy_obj);
96 if (ide_device_get(floppy->drive))
99 kref_get(&floppy->kref);
101 mutex_unlock(&idefloppy_ref_mutex);
105 static void ide_floppy_put(struct ide_floppy_obj *floppy)
107 ide_drive_t *drive = floppy->drive;
109 mutex_lock(&idefloppy_ref_mutex);
110 kref_put(&floppy->kref, idefloppy_cleanup_obj);
111 ide_device_put(drive);
112 mutex_unlock(&idefloppy_ref_mutex);
116 * Used to finish servicing a request. For read/write requests, we will call
117 * ide_end_request to pass to the next buffer.
119 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
121 idefloppy_floppy_t *floppy = drive->driver_data;
122 struct request *rq = HWGROUP(drive)->rq;
125 debug_log("Reached %s\n", __func__);
128 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
129 case 1: error = 0; break;
130 default: error = uptodate;
133 floppy->failed_pc = NULL;
134 /* Why does this happen? */
137 if (!blk_special_request(rq)) {
138 /* our real local end request function */
139 ide_end_request(drive, uptodate, nsecs);
143 /* fixme: need to move this local also */
144 ide_end_drive_cmd(drive, 0, 0);
148 static void idefloppy_update_buffers(ide_drive_t *drive,
149 struct ide_atapi_pc *pc)
151 struct request *rq = pc->rq;
152 struct bio *bio = rq->bio;
154 while ((bio = rq->bio) != NULL)
155 idefloppy_end_request(drive, 1, 0);
158 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
160 idefloppy_floppy_t *floppy = drive->driver_data;
161 struct ide_atapi_pc *pc = drive->pc;
162 int uptodate = pc->error ? 0 : 1;
164 debug_log("Reached %s\n", __func__);
166 if (floppy->failed_pc == pc)
167 floppy->failed_pc = NULL;
169 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
170 (pc->rq && blk_pc_request(pc->rq)))
171 uptodate = 1; /* FIXME */
172 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
176 floppy->sense_key = buf[2] & 0x0F;
177 floppy->asc = buf[12];
178 floppy->ascq = buf[13];
179 floppy->progress_indication = buf[15] & 0x80 ?
180 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
182 if (floppy->failed_pc)
183 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
185 debug_log("sense key = %x, asc = %x, ascq = %x\n",
186 floppy->sense_key, floppy->asc, floppy->ascq);
188 printk(KERN_ERR "Error in REQUEST SENSE itself - "
189 "Aborting request!\n");
192 idefloppy_end_request(drive, uptodate, 0);
195 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
196 struct ide_atapi_pc *pc)
198 /* supress error messages resulting from Medium not present */
199 if (floppy->sense_key == 0x02 &&
200 floppy->asc == 0x3a &&
201 floppy->ascq == 0x00)
204 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
205 "asc = %2x, ascq = %2x\n",
206 floppy->drive->name, pc->c[0], floppy->sense_key,
207 floppy->asc, floppy->ascq);
211 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
212 struct ide_atapi_pc *pc)
214 idefloppy_floppy_t *floppy = drive->driver_data;
216 if (floppy->failed_pc == NULL &&
217 pc->c[0] != GPCMD_REQUEST_SENSE)
218 floppy->failed_pc = pc;
220 /* Set the current packet command */
223 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
224 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
225 ide_floppy_report_error(floppy, pc);
227 pc->error = IDEFLOPPY_ERROR_GENERAL;
229 floppy->failed_pc = NULL;
230 drive->pc_callback(drive, 0);
234 debug_log("Retry number - %d\n", pc->retries);
238 return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL);
241 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
244 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
250 /* A mode sense command is used to "sense" floppy parameters. */
251 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
253 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
256 pc->c[0] = GPCMD_MODE_SENSE_10;
258 pc->c[2] = page_code;
261 case IDEFLOPPY_CAPABILITIES_PAGE:
264 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
268 printk(KERN_ERR "ide-floppy: unsupported page code "
269 "in create_mode_sense_cmd\n");
271 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
272 pc->req_xfer = length;
275 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
276 struct ide_atapi_pc *pc, struct request *rq,
277 unsigned long sector)
279 int block = sector / floppy->bs_factor;
280 int blocks = rq->nr_sectors / floppy->bs_factor;
281 int cmd = rq_data_dir(rq);
283 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
287 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
288 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
289 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
291 memcpy(rq->cmd, pc->c, 12);
295 if (rq->cmd_flags & REQ_RW)
296 pc->flags |= PC_FLAG_WRITING;
298 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
299 pc->flags |= PC_FLAG_DMA_OK;
302 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
303 struct ide_atapi_pc *pc, struct request *rq)
306 memcpy(pc->c, rq->cmd, sizeof(pc->c));
309 if (rq->data_len && rq_data_dir(rq) == WRITE)
310 pc->flags |= PC_FLAG_WRITING;
313 pc->flags |= PC_FLAG_DMA_OK;
315 * possibly problematic, doesn't look like ide-floppy correctly
316 * handled scattered requests if dma fails...
318 pc->req_xfer = pc->buf_size = rq->data_len;
321 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
322 struct request *rq, sector_t block_s)
324 idefloppy_floppy_t *floppy = drive->driver_data;
325 ide_hwif_t *hwif = drive->hwif;
326 struct ide_atapi_pc *pc;
327 unsigned long block = (unsigned long)block_s;
329 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
330 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
331 rq->cmd[0], rq->cmd_type, rq->errors);
333 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
334 __func__, (long)rq->sector, rq->nr_sectors,
335 rq->current_nr_sectors);
337 if (rq->errors >= ERROR_MAX) {
338 if (floppy->failed_pc)
339 ide_floppy_report_error(floppy, floppy->failed_pc);
341 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
343 idefloppy_end_request(drive, 0, 0);
346 if (blk_fs_request(rq)) {
347 if (((long)rq->sector % floppy->bs_factor) ||
348 (rq->nr_sectors % floppy->bs_factor)) {
349 printk(KERN_ERR "%s: unsupported r/w request size\n",
351 idefloppy_end_request(drive, 0, 0);
354 pc = &floppy->queued_pc;
355 idefloppy_create_rw_cmd(floppy, pc, rq, block);
356 } else if (blk_special_request(rq)) {
357 pc = (struct ide_atapi_pc *) rq->buffer;
358 } else if (blk_pc_request(rq)) {
359 pc = &floppy->queued_pc;
360 idefloppy_blockpc_cmd(floppy, pc, rq);
362 blk_dump_rq_flags(rq,
363 "ide-floppy: unsupported command in queue");
364 idefloppy_end_request(drive, 0, 0);
368 ide_init_sg_cmd(drive, rq);
369 ide_map_sg(drive, rq);
371 pc->sg = hwif->sg_table;
372 pc->sg_cnt = hwif->sg_nents;
376 return idefloppy_issue_pc(drive, pc);
380 * Look at the flexible disk page parameters. We ignore the CHS capacity
381 * parameters and use the LBA parameters instead.
383 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
385 idefloppy_floppy_t *floppy = drive->driver_data;
386 struct gendisk *disk = floppy->disk;
387 struct ide_atapi_pc pc;
389 int capacity, lba_capacity;
390 u16 transfer_rate, sector_size, cyls, rpm;
393 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
395 if (ide_queue_pc_tail(drive, disk, &pc)) {
396 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
401 if (pc.buf[3] & 0x80)
402 drive->atapi_flags |= IDE_AFLAG_WP;
404 drive->atapi_flags &= ~IDE_AFLAG_WP;
406 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
410 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
411 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
412 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
413 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
414 heads = pc.buf[8 + 4];
415 sectors = pc.buf[8 + 5];
417 capacity = cyls * heads * sectors * sector_size;
419 if (memcmp(page, &floppy->flexible_disk_page, 32))
420 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
421 "%d sector size, %d rpm\n",
422 drive->name, capacity / 1024, cyls, heads,
423 sectors, transfer_rate / 8, sector_size, rpm);
425 memcpy(&floppy->flexible_disk_page, page, 32);
426 drive->bios_cyl = cyls;
427 drive->bios_head = heads;
428 drive->bios_sect = sectors;
429 lba_capacity = floppy->blocks * floppy->block_size;
431 if (capacity < lba_capacity) {
432 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
433 "bytes, but the drive only handles %d\n",
434 drive->name, lba_capacity, capacity);
435 floppy->blocks = floppy->block_size ?
436 capacity / floppy->block_size : 0;
442 * Determine if a media is present in the floppy drive, and if so, its LBA
445 static int ide_floppy_get_capacity(ide_drive_t *drive)
447 idefloppy_floppy_t *floppy = drive->driver_data;
448 struct gendisk *disk = floppy->disk;
449 struct ide_atapi_pc pc;
451 u8 header_len, desc_cnt;
452 int i, rc = 1, blocks, length;
455 drive->bios_head = drive->bios_sect = 0;
457 floppy->bs_factor = 1;
458 set_capacity(floppy->disk, 0);
460 ide_floppy_create_read_capacity_cmd(&pc);
461 if (ide_queue_pc_tail(drive, disk, &pc)) {
462 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
465 header_len = pc.buf[3];
466 cap_desc = &pc.buf[4];
467 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
469 for (i = 0; i < desc_cnt; i++) {
470 unsigned int desc_start = 4 + i*8;
472 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
473 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
475 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
476 i, blocks * length / 1024, blocks, length);
481 * the code below is valid only for the 1st descriptor, ie i=0
484 switch (pc.buf[desc_start + 4] & 0x03) {
485 /* Clik! drive returns this instead of CAPACITY_CURRENT */
486 case CAPACITY_UNFORMATTED:
487 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
489 * If it is not a clik drive, break out
490 * (maintains previous driver behaviour)
493 case CAPACITY_CURRENT:
494 /* Normal Zip/LS-120 disks */
495 if (memcmp(cap_desc, &floppy->cap_desc, 8))
496 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
497 "sector size\n", drive->name,
498 blocks * length / 1024, blocks, length);
499 memcpy(&floppy->cap_desc, cap_desc, 8);
501 if (!length || length % 512) {
502 printk(KERN_NOTICE "%s: %d bytes block size "
503 "not supported\n", drive->name, length);
505 floppy->blocks = blocks;
506 floppy->block_size = length;
507 floppy->bs_factor = length / 512;
508 if (floppy->bs_factor != 1)
509 printk(KERN_NOTICE "%s: warning: non "
510 "512 bytes block size not "
516 case CAPACITY_NO_CARTRIDGE:
518 * This is a KERN_ERR so it appears on screen
519 * for the user to see
521 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
523 case CAPACITY_INVALID:
524 printk(KERN_ERR "%s: Invalid capacity for disk "
525 "in drive\n", drive->name);
528 debug_log("Descriptor 0 Code: %d\n",
529 pc.buf[desc_start + 4] & 0x03);
532 /* Clik! disk does not support get_flexible_disk_page */
533 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
534 (void) ide_floppy_get_flexible_disk_page(drive);
536 set_capacity(disk, floppy->blocks * floppy->bs_factor);
541 static sector_t idefloppy_capacity(ide_drive_t *drive)
543 idefloppy_floppy_t *floppy = drive->driver_data;
544 unsigned long capacity = floppy->blocks * floppy->bs_factor;
549 #ifdef CONFIG_IDE_PROC_FS
550 ide_devset_rw_field(bios_cyl, bios_cyl);
551 ide_devset_rw_field(bios_head, bios_head);
552 ide_devset_rw_field(bios_sect, bios_sect);
553 ide_devset_rw_field(ticks, pc_delay);
555 static const struct ide_proc_devset idefloppy_settings[] = {
556 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
557 IDE_PROC_DEVSET(bios_head, 0, 255),
558 IDE_PROC_DEVSET(bios_sect, 0, 63),
559 IDE_PROC_DEVSET(ticks, 0, 255),
564 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
569 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
571 drive->pc_callback = ide_floppy_callback;
572 drive->pc_update_buffers = idefloppy_update_buffers;
573 drive->pc_io_buffers = ide_io_buffers;
575 if (((gcw[0] & 0x60) >> 5) == 1)
576 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
578 * We used to check revisions here. At this point however I'm giving up.
579 * Just assume they are all broken, its easier.
581 * The actual reason for the workarounds was likely a driver bug after
582 * all rather than a firmware bug, and the workaround below used to hide
583 * it. It should be fixed as of version 1.9, but to be on the safe side
584 * we'll leave the limitation below for the 2.2.x tree.
586 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
587 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
588 /* This value will be visible in the /proc/ide/hdx/settings */
589 drive->pc_delay = IDEFLOPPY_PC_DELAY;
590 blk_queue_max_sectors(drive->queue, 64);
594 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
595 * nasty clicking noises without it, so please don't remove this.
597 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
598 blk_queue_max_sectors(drive->queue, 64);
599 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
600 /* IOMEGA Clik! drives do not support lock/unlock commands */
601 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
604 (void) ide_floppy_get_capacity(drive);
606 ide_proc_register_driver(drive, floppy->driver);
609 static void ide_floppy_remove(ide_drive_t *drive)
611 idefloppy_floppy_t *floppy = drive->driver_data;
612 struct gendisk *g = floppy->disk;
614 ide_proc_unregister_driver(drive, floppy->driver);
618 ide_floppy_put(floppy);
621 static void idefloppy_cleanup_obj(struct kref *kref)
623 struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj);
624 ide_drive_t *drive = floppy->drive;
625 struct gendisk *g = floppy->disk;
627 drive->driver_data = NULL;
628 g->private_data = NULL;
633 #ifdef CONFIG_IDE_PROC_FS
634 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
635 int count, int *eof, void *data)
637 ide_drive_t*drive = (ide_drive_t *)data;
640 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
641 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
644 static ide_proc_entry_t idefloppy_proc[] = {
645 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
646 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
647 { NULL, 0, NULL, NULL }
649 #endif /* CONFIG_IDE_PROC_FS */
651 static int ide_floppy_probe(ide_drive_t *);
653 static ide_driver_t idefloppy_driver = {
655 .owner = THIS_MODULE,
656 .name = "ide-floppy",
657 .bus = &ide_bus_type,
659 .probe = ide_floppy_probe,
660 .remove = ide_floppy_remove,
661 .version = IDEFLOPPY_VERSION,
663 .do_request = idefloppy_do_request,
664 .end_request = idefloppy_end_request,
665 .error = __ide_error,
666 #ifdef CONFIG_IDE_PROC_FS
667 .proc = idefloppy_proc,
668 .settings = idefloppy_settings,
672 static int idefloppy_open(struct inode *inode, struct file *filp)
674 struct gendisk *disk = inode->i_bdev->bd_disk;
675 struct ide_floppy_obj *floppy;
679 debug_log("Reached %s\n", __func__);
681 floppy = ide_floppy_get(disk);
685 drive = floppy->drive;
689 if (floppy->openers == 1) {
690 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
693 if (ide_do_test_unit_ready(drive, disk))
694 ide_do_start_stop(drive, disk, 1);
696 if (ide_floppy_get_capacity(drive)
697 && (filp->f_flags & O_NDELAY) == 0
699 * Allow O_NDELAY to open a drive without a disk, or with an
700 * unreadable disk, so that we can get the format capacity
701 * of the drive or begin the format - Sam
708 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
713 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
714 ide_set_media_lock(drive, disk, 1);
715 check_disk_change(inode->i_bdev);
716 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
724 ide_floppy_put(floppy);
728 static int idefloppy_release(struct inode *inode, struct file *filp)
730 struct gendisk *disk = inode->i_bdev->bd_disk;
731 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
732 ide_drive_t *drive = floppy->drive;
734 debug_log("Reached %s\n", __func__);
736 if (floppy->openers == 1) {
737 ide_set_media_lock(drive, disk, 0);
738 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
743 ide_floppy_put(floppy);
748 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
750 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
752 ide_drive_t *drive = floppy->drive;
754 geo->heads = drive->bios_head;
755 geo->sectors = drive->bios_sect;
756 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
760 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
761 unsigned long arg, unsigned int cmd)
763 idefloppy_floppy_t *floppy = drive->driver_data;
764 struct gendisk *disk = floppy->disk;
765 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
767 if (floppy->openers > 1)
770 ide_set_media_lock(drive, disk, prevent);
772 if (cmd == CDROMEJECT)
773 ide_do_start_stop(drive, disk, 2);
778 static int idefloppy_ioctl(struct inode *inode, struct file *file,
779 unsigned int cmd, unsigned long arg)
781 struct block_device *bdev = inode->i_bdev;
782 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
784 ide_drive_t *drive = floppy->drive;
785 struct ide_atapi_pc pc;
786 void __user *argp = (void __user *)arg;
789 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
790 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
792 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
797 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
798 * and CDROM_SEND_PACKET (legacy) ioctls
800 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
801 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
802 bdev->bd_disk, cmd, argp);
805 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
810 static int idefloppy_media_changed(struct gendisk *disk)
812 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
813 ide_drive_t *drive = floppy->drive;
816 /* do not scan partitions twice if this is a removable device */
821 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
822 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
826 static int idefloppy_revalidate_disk(struct gendisk *disk)
828 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
829 set_capacity(disk, idefloppy_capacity(floppy->drive));
833 static struct block_device_operations idefloppy_ops = {
834 .owner = THIS_MODULE,
835 .open = idefloppy_open,
836 .release = idefloppy_release,
837 .ioctl = idefloppy_ioctl,
838 .getgeo = idefloppy_getgeo,
839 .media_changed = idefloppy_media_changed,
840 .revalidate_disk = idefloppy_revalidate_disk
843 static int ide_floppy_probe(ide_drive_t *drive)
845 idefloppy_floppy_t *floppy;
848 if (!strstr("ide-floppy", drive->driver_req))
851 if (drive->media != ide_floppy)
854 if (!ide_check_atapi_device(drive, DRV_NAME)) {
855 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
856 " of ide-floppy\n", drive->name);
859 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
861 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
862 " structure\n", drive->name);
866 g = alloc_disk(1 << PARTN_BITS);
868 goto out_free_floppy;
870 ide_init_disk(g, drive);
872 kref_init(&floppy->kref);
874 floppy->drive = drive;
875 floppy->driver = &idefloppy_driver;
878 g->private_data = &floppy->driver;
880 drive->driver_data = floppy;
882 idefloppy_setup(drive, floppy);
884 g->minors = 1 << PARTN_BITS;
885 g->driverfs_dev = &drive->gendev;
886 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
887 g->fops = &idefloppy_ops;
898 static void __exit idefloppy_exit(void)
900 driver_unregister(&idefloppy_driver.gen_driver);
903 static int __init idefloppy_init(void)
905 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
906 return driver_register(&idefloppy_driver.gen_driver);
909 MODULE_ALIAS("ide:*m-floppy*");
910 MODULE_ALIAS("ide-floppy");
911 module_init(idefloppy_init);
912 module_exit(idefloppy_exit);
913 MODULE_LICENSE("GPL");
914 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");