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
76 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
78 /* Error code returned in rq->errors to the higher part of the driver. */
79 #define IDEFLOPPY_ERROR_GENERAL 101
81 static DEFINE_MUTEX(idefloppy_ref_mutex);
83 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
85 #define ide_floppy_g(disk) \
86 container_of((disk)->private_data, struct ide_floppy_obj, driver)
88 static void idefloppy_cleanup_obj(struct kref *);
90 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
92 struct ide_floppy_obj *floppy = NULL;
94 mutex_lock(&idefloppy_ref_mutex);
95 floppy = ide_floppy_g(disk);
97 if (ide_device_get(floppy->drive))
100 kref_get(&floppy->kref);
102 mutex_unlock(&idefloppy_ref_mutex);
106 static void ide_floppy_put(struct ide_floppy_obj *floppy)
108 ide_drive_t *drive = floppy->drive;
110 mutex_lock(&idefloppy_ref_mutex);
111 kref_put(&floppy->kref, idefloppy_cleanup_obj);
112 ide_device_put(drive);
113 mutex_unlock(&idefloppy_ref_mutex);
117 * Used to finish servicing a request. For read/write requests, we will call
118 * ide_end_request to pass to the next buffer.
120 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
122 idefloppy_floppy_t *floppy = drive->driver_data;
123 struct request *rq = HWGROUP(drive)->rq;
126 debug_log("Reached %s\n", __func__);
129 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
130 case 1: error = 0; break;
131 default: error = uptodate;
134 floppy->failed_pc = NULL;
135 /* Why does this happen? */
138 if (!blk_special_request(rq)) {
139 /* our real local end request function */
140 ide_end_request(drive, uptodate, nsecs);
144 /* fixme: need to move this local also */
145 ide_end_drive_cmd(drive, 0, 0);
149 static void idefloppy_update_buffers(ide_drive_t *drive,
150 struct ide_atapi_pc *pc)
152 struct request *rq = pc->rq;
153 struct bio *bio = rq->bio;
155 while ((bio = rq->bio) != NULL)
156 idefloppy_end_request(drive, 1, 0);
159 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
161 idefloppy_floppy_t *floppy = drive->driver_data;
162 struct ide_atapi_pc *pc = drive->pc;
163 int uptodate = pc->error ? 0 : 1;
165 debug_log("Reached %s\n", __func__);
167 if (floppy->failed_pc == pc)
168 floppy->failed_pc = NULL;
170 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
171 (pc->rq && blk_pc_request(pc->rq)))
172 uptodate = 1; /* FIXME */
173 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
177 floppy->sense_key = buf[2] & 0x0F;
178 floppy->asc = buf[12];
179 floppy->ascq = buf[13];
180 floppy->progress_indication = buf[15] & 0x80 ?
181 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
183 if (floppy->failed_pc)
184 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
186 debug_log("sense key = %x, asc = %x, ascq = %x\n",
187 floppy->sense_key, floppy->asc, floppy->ascq);
189 printk(KERN_ERR "Error in REQUEST SENSE itself - "
190 "Aborting request!\n");
193 idefloppy_end_request(drive, uptodate, 0);
197 * What we have here is a classic case of a top half / bottom half interrupt
198 * service routine. In interrupt mode, the device sends an interrupt to signal
199 * that it is ready to receive a packet. However, we need to delay about 2-3
200 * ticks before issuing the packet or we gets in trouble.
202 static int idefloppy_transfer_pc(ide_drive_t *drive)
204 /* Send the actual packet */
205 drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
207 /* Timeout for the packet command */
208 return WAIT_FLOPPY_CMD;
212 * Called as an interrupt (or directly). When the device says it's ready for a
213 * packet, we schedule the packet transfer to occur about 2-3 ticks later in
216 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
218 idefloppy_floppy_t *floppy = drive->driver_data;
219 ide_expiry_t *expiry;
220 unsigned int timeout;
223 * The following delay solves a problem with ATAPI Zip 100 drives
224 * where the Busy flag was apparently being deasserted before the
225 * unit was ready to receive data. This was happening on a
226 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
227 * 40 and 50msec work well. ide_pc_intr will not be actually
228 * used until after the packet is moved in about 50 msec.
230 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
231 timeout = floppy->ticks;
232 expiry = &idefloppy_transfer_pc;
234 timeout = WAIT_FLOPPY_CMD;
238 return ide_transfer_pc(drive, timeout, expiry);
241 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
242 struct ide_atapi_pc *pc)
244 /* supress error messages resulting from Medium not present */
245 if (floppy->sense_key == 0x02 &&
246 floppy->asc == 0x3a &&
247 floppy->ascq == 0x00)
250 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
251 "asc = %2x, ascq = %2x\n",
252 floppy->drive->name, pc->c[0], floppy->sense_key,
253 floppy->asc, floppy->ascq);
257 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
258 struct ide_atapi_pc *pc)
260 idefloppy_floppy_t *floppy = drive->driver_data;
262 if (floppy->failed_pc == NULL &&
263 pc->c[0] != GPCMD_REQUEST_SENSE)
264 floppy->failed_pc = pc;
266 /* Set the current packet command */
269 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
270 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
271 ide_floppy_report_error(floppy, pc);
273 pc->error = IDEFLOPPY_ERROR_GENERAL;
275 floppy->failed_pc = NULL;
276 drive->pc_callback(drive, 0);
280 debug_log("Retry number - %d\n", pc->retries);
284 return ide_issue_pc(drive, idefloppy_start_pc_transfer,
285 WAIT_FLOPPY_CMD, NULL);
288 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
291 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
297 /* A mode sense command is used to "sense" floppy parameters. */
298 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
300 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
303 pc->c[0] = GPCMD_MODE_SENSE_10;
305 pc->c[2] = page_code;
308 case IDEFLOPPY_CAPABILITIES_PAGE:
311 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
315 printk(KERN_ERR "ide-floppy: unsupported page code "
316 "in create_mode_sense_cmd\n");
318 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
319 pc->req_xfer = length;
322 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
323 struct ide_atapi_pc *pc, struct request *rq,
324 unsigned long sector)
326 int block = sector / floppy->bs_factor;
327 int blocks = rq->nr_sectors / floppy->bs_factor;
328 int cmd = rq_data_dir(rq);
330 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
334 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
335 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
336 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
338 memcpy(rq->cmd, pc->c, 12);
342 if (rq->cmd_flags & REQ_RW)
343 pc->flags |= PC_FLAG_WRITING;
345 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
346 pc->flags |= PC_FLAG_DMA_OK;
349 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
350 struct ide_atapi_pc *pc, struct request *rq)
353 memcpy(pc->c, rq->cmd, sizeof(pc->c));
356 if (rq->data_len && rq_data_dir(rq) == WRITE)
357 pc->flags |= PC_FLAG_WRITING;
360 pc->flags |= PC_FLAG_DMA_OK;
362 * possibly problematic, doesn't look like ide-floppy correctly
363 * handled scattered requests if dma fails...
365 pc->req_xfer = pc->buf_size = rq->data_len;
368 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
369 struct request *rq, sector_t block_s)
371 idefloppy_floppy_t *floppy = drive->driver_data;
372 ide_hwif_t *hwif = drive->hwif;
373 struct ide_atapi_pc *pc;
374 unsigned long block = (unsigned long)block_s;
376 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
377 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
378 rq->cmd[0], rq->cmd_type, rq->errors);
380 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
381 __func__, (long)rq->sector, rq->nr_sectors,
382 rq->current_nr_sectors);
384 if (rq->errors >= ERROR_MAX) {
385 if (floppy->failed_pc)
386 ide_floppy_report_error(floppy, floppy->failed_pc);
388 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
390 idefloppy_end_request(drive, 0, 0);
393 if (blk_fs_request(rq)) {
394 if (((long)rq->sector % floppy->bs_factor) ||
395 (rq->nr_sectors % floppy->bs_factor)) {
396 printk(KERN_ERR "%s: unsupported r/w request size\n",
398 idefloppy_end_request(drive, 0, 0);
401 pc = &floppy->queued_pc;
402 idefloppy_create_rw_cmd(floppy, pc, rq, block);
403 } else if (blk_special_request(rq)) {
404 pc = (struct ide_atapi_pc *) rq->buffer;
405 } else if (blk_pc_request(rq)) {
406 pc = &floppy->queued_pc;
407 idefloppy_blockpc_cmd(floppy, pc, rq);
409 blk_dump_rq_flags(rq,
410 "ide-floppy: unsupported command in queue");
411 idefloppy_end_request(drive, 0, 0);
415 ide_init_sg_cmd(drive, rq);
416 ide_map_sg(drive, rq);
418 pc->sg = hwif->sg_table;
419 pc->sg_cnt = hwif->sg_nents;
423 return idefloppy_issue_pc(drive, pc);
427 * Look at the flexible disk page parameters. We ignore the CHS capacity
428 * parameters and use the LBA parameters instead.
430 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
432 idefloppy_floppy_t *floppy = drive->driver_data;
433 struct gendisk *disk = floppy->disk;
434 struct ide_atapi_pc pc;
436 int capacity, lba_capacity;
437 u16 transfer_rate, sector_size, cyls, rpm;
440 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
442 if (ide_queue_pc_tail(drive, disk, &pc)) {
443 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
448 if (pc.buf[3] & 0x80)
449 drive->atapi_flags |= IDE_AFLAG_WP;
451 drive->atapi_flags &= ~IDE_AFLAG_WP;
453 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
457 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
458 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
459 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
460 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
461 heads = pc.buf[8 + 4];
462 sectors = pc.buf[8 + 5];
464 capacity = cyls * heads * sectors * sector_size;
466 if (memcmp(page, &floppy->flexible_disk_page, 32))
467 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
468 "%d sector size, %d rpm\n",
469 drive->name, capacity / 1024, cyls, heads,
470 sectors, transfer_rate / 8, sector_size, rpm);
472 memcpy(&floppy->flexible_disk_page, page, 32);
473 drive->bios_cyl = cyls;
474 drive->bios_head = heads;
475 drive->bios_sect = sectors;
476 lba_capacity = floppy->blocks * floppy->block_size;
478 if (capacity < lba_capacity) {
479 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
480 "bytes, but the drive only handles %d\n",
481 drive->name, lba_capacity, capacity);
482 floppy->blocks = floppy->block_size ?
483 capacity / floppy->block_size : 0;
489 * Determine if a media is present in the floppy drive, and if so, its LBA
492 static int ide_floppy_get_capacity(ide_drive_t *drive)
494 idefloppy_floppy_t *floppy = drive->driver_data;
495 struct gendisk *disk = floppy->disk;
496 struct ide_atapi_pc pc;
498 u8 header_len, desc_cnt;
499 int i, rc = 1, blocks, length;
502 drive->bios_head = drive->bios_sect = 0;
504 floppy->bs_factor = 1;
505 set_capacity(floppy->disk, 0);
507 ide_floppy_create_read_capacity_cmd(&pc);
508 if (ide_queue_pc_tail(drive, disk, &pc)) {
509 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
512 header_len = pc.buf[3];
513 cap_desc = &pc.buf[4];
514 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
516 for (i = 0; i < desc_cnt; i++) {
517 unsigned int desc_start = 4 + i*8;
519 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
520 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
522 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
523 i, blocks * length / 1024, blocks, length);
528 * the code below is valid only for the 1st descriptor, ie i=0
531 switch (pc.buf[desc_start + 4] & 0x03) {
532 /* Clik! drive returns this instead of CAPACITY_CURRENT */
533 case CAPACITY_UNFORMATTED:
534 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
536 * If it is not a clik drive, break out
537 * (maintains previous driver behaviour)
540 case CAPACITY_CURRENT:
541 /* Normal Zip/LS-120 disks */
542 if (memcmp(cap_desc, &floppy->cap_desc, 8))
543 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
544 "sector size\n", drive->name,
545 blocks * length / 1024, blocks, length);
546 memcpy(&floppy->cap_desc, cap_desc, 8);
548 if (!length || length % 512) {
549 printk(KERN_NOTICE "%s: %d bytes block size "
550 "not supported\n", drive->name, length);
552 floppy->blocks = blocks;
553 floppy->block_size = length;
554 floppy->bs_factor = length / 512;
555 if (floppy->bs_factor != 1)
556 printk(KERN_NOTICE "%s: warning: non "
557 "512 bytes block size not "
563 case CAPACITY_NO_CARTRIDGE:
565 * This is a KERN_ERR so it appears on screen
566 * for the user to see
568 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
570 case CAPACITY_INVALID:
571 printk(KERN_ERR "%s: Invalid capacity for disk "
572 "in drive\n", drive->name);
575 debug_log("Descriptor 0 Code: %d\n",
576 pc.buf[desc_start + 4] & 0x03);
579 /* Clik! disk does not support get_flexible_disk_page */
580 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
581 (void) ide_floppy_get_flexible_disk_page(drive);
583 set_capacity(disk, floppy->blocks * floppy->bs_factor);
588 static sector_t idefloppy_capacity(ide_drive_t *drive)
590 idefloppy_floppy_t *floppy = drive->driver_data;
591 unsigned long capacity = floppy->blocks * floppy->bs_factor;
596 #ifdef CONFIG_IDE_PROC_FS
597 ide_devset_rw_field(bios_cyl, bios_cyl);
598 ide_devset_rw_field(bios_head, bios_head);
599 ide_devset_rw_field(bios_sect, bios_sect);
601 static int get_ticks(ide_drive_t *drive)
603 idefloppy_floppy_t *floppy = drive->driver_data;
604 return floppy->ticks;
607 static int set_ticks(ide_drive_t *drive, int arg)
609 idefloppy_floppy_t *floppy = drive->driver_data;
614 IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks);
616 static const struct ide_proc_devset idefloppy_settings[] = {
617 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
618 IDE_PROC_DEVSET(bios_head, 0, 255),
619 IDE_PROC_DEVSET(bios_sect, 0, 63),
620 IDE_PROC_DEVSET(ticks, 0, 255),
625 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
630 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
632 drive->pc_callback = ide_floppy_callback;
633 drive->pc_update_buffers = idefloppy_update_buffers;
634 drive->pc_io_buffers = ide_io_buffers;
636 if (((gcw[0] & 0x60) >> 5) == 1)
637 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
639 * We used to check revisions here. At this point however I'm giving up.
640 * Just assume they are all broken, its easier.
642 * The actual reason for the workarounds was likely a driver bug after
643 * all rather than a firmware bug, and the workaround below used to hide
644 * it. It should be fixed as of version 1.9, but to be on the safe side
645 * we'll leave the limitation below for the 2.2.x tree.
647 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
648 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
649 /* This value will be visible in the /proc/ide/hdx/settings */
650 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
651 blk_queue_max_sectors(drive->queue, 64);
655 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
656 * nasty clicking noises without it, so please don't remove this.
658 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
659 blk_queue_max_sectors(drive->queue, 64);
660 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
661 /* IOMEGA Clik! drives do not support lock/unlock commands */
662 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
665 (void) ide_floppy_get_capacity(drive);
667 ide_proc_register_driver(drive, floppy->driver);
670 static void ide_floppy_remove(ide_drive_t *drive)
672 idefloppy_floppy_t *floppy = drive->driver_data;
673 struct gendisk *g = floppy->disk;
675 ide_proc_unregister_driver(drive, floppy->driver);
679 ide_floppy_put(floppy);
682 static void idefloppy_cleanup_obj(struct kref *kref)
684 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
685 ide_drive_t *drive = floppy->drive;
686 struct gendisk *g = floppy->disk;
688 drive->driver_data = NULL;
689 g->private_data = NULL;
694 #ifdef CONFIG_IDE_PROC_FS
695 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
696 int count, int *eof, void *data)
698 ide_drive_t*drive = (ide_drive_t *)data;
701 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
702 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
705 static ide_proc_entry_t idefloppy_proc[] = {
706 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
707 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
708 { NULL, 0, NULL, NULL }
710 #endif /* CONFIG_IDE_PROC_FS */
712 static int ide_floppy_probe(ide_drive_t *);
714 static ide_driver_t idefloppy_driver = {
716 .owner = THIS_MODULE,
717 .name = "ide-floppy",
718 .bus = &ide_bus_type,
720 .probe = ide_floppy_probe,
721 .remove = ide_floppy_remove,
722 .version = IDEFLOPPY_VERSION,
724 .do_request = idefloppy_do_request,
725 .end_request = idefloppy_end_request,
726 .error = __ide_error,
727 #ifdef CONFIG_IDE_PROC_FS
728 .proc = idefloppy_proc,
729 .settings = idefloppy_settings,
733 static int idefloppy_open(struct inode *inode, struct file *filp)
735 struct gendisk *disk = inode->i_bdev->bd_disk;
736 struct ide_floppy_obj *floppy;
740 debug_log("Reached %s\n", __func__);
742 floppy = ide_floppy_get(disk);
746 drive = floppy->drive;
750 if (floppy->openers == 1) {
751 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
754 if (ide_do_test_unit_ready(drive, disk))
755 ide_do_start_stop(drive, disk, 1);
757 if (ide_floppy_get_capacity(drive)
758 && (filp->f_flags & O_NDELAY) == 0
760 * Allow O_NDELAY to open a drive without a disk, or with an
761 * unreadable disk, so that we can get the format capacity
762 * of the drive or begin the format - Sam
769 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
774 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
775 ide_set_media_lock(drive, disk, 1);
776 check_disk_change(inode->i_bdev);
777 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
785 ide_floppy_put(floppy);
789 static int idefloppy_release(struct inode *inode, struct file *filp)
791 struct gendisk *disk = inode->i_bdev->bd_disk;
792 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
793 ide_drive_t *drive = floppy->drive;
795 debug_log("Reached %s\n", __func__);
797 if (floppy->openers == 1) {
798 ide_set_media_lock(drive, disk, 0);
799 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
804 ide_floppy_put(floppy);
809 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
811 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
812 ide_drive_t *drive = floppy->drive;
814 geo->heads = drive->bios_head;
815 geo->sectors = drive->bios_sect;
816 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
820 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
821 unsigned long arg, unsigned int cmd)
823 idefloppy_floppy_t *floppy = drive->driver_data;
824 struct gendisk *disk = floppy->disk;
825 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
827 if (floppy->openers > 1)
830 ide_set_media_lock(drive, disk, prevent);
832 if (cmd == CDROMEJECT)
833 ide_do_start_stop(drive, disk, 2);
838 static int idefloppy_ioctl(struct inode *inode, struct file *file,
839 unsigned int cmd, unsigned long arg)
841 struct block_device *bdev = inode->i_bdev;
842 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
843 ide_drive_t *drive = floppy->drive;
844 struct ide_atapi_pc pc;
845 void __user *argp = (void __user *)arg;
848 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
849 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
851 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
856 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
857 * and CDROM_SEND_PACKET (legacy) ioctls
859 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
860 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
861 bdev->bd_disk, cmd, argp);
864 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
869 static int idefloppy_media_changed(struct gendisk *disk)
871 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
872 ide_drive_t *drive = floppy->drive;
875 /* do not scan partitions twice if this is a removable device */
880 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
881 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
885 static int idefloppy_revalidate_disk(struct gendisk *disk)
887 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
888 set_capacity(disk, idefloppy_capacity(floppy->drive));
892 static struct block_device_operations idefloppy_ops = {
893 .owner = THIS_MODULE,
894 .open = idefloppy_open,
895 .release = idefloppy_release,
896 .ioctl = idefloppy_ioctl,
897 .getgeo = idefloppy_getgeo,
898 .media_changed = idefloppy_media_changed,
899 .revalidate_disk = idefloppy_revalidate_disk
902 static int ide_floppy_probe(ide_drive_t *drive)
904 idefloppy_floppy_t *floppy;
907 if (!strstr("ide-floppy", drive->driver_req))
910 if (drive->media != ide_floppy)
913 if (!ide_check_atapi_device(drive, DRV_NAME)) {
914 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
915 " of ide-floppy\n", drive->name);
918 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
920 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
921 " structure\n", drive->name);
925 g = alloc_disk(1 << PARTN_BITS);
927 goto out_free_floppy;
929 ide_init_disk(g, drive);
931 kref_init(&floppy->kref);
933 floppy->drive = drive;
934 floppy->driver = &idefloppy_driver;
937 g->private_data = &floppy->driver;
939 drive->driver_data = floppy;
941 idefloppy_setup(drive, floppy);
943 g->minors = 1 << PARTN_BITS;
944 g->driverfs_dev = &drive->gendev;
945 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
946 g->fops = &idefloppy_ops;
957 static void __exit idefloppy_exit(void)
959 driver_unregister(&idefloppy_driver.gen_driver);
962 static int __init idefloppy_init(void)
964 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
965 return driver_register(&idefloppy_driver.gen_driver);
968 MODULE_ALIAS("ide:*m-floppy*");
969 MODULE_ALIAS("ide-floppy");
970 module_init(idefloppy_init);
971 module_exit(idefloppy_exit);
972 MODULE_LICENSE("GPL");
973 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");