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);
196 void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
199 pc->c[0] = GPCMD_REQUEST_SENSE;
205 * Called when an error was detected during the last packet command. We queue a
206 * request sense packet command in the head of the request list.
208 static void idefloppy_retry_pc(ide_drive_t *drive)
210 struct ide_floppy_obj *floppy = drive->driver_data;
211 struct request *rq = &floppy->request_sense_rq;
212 struct ide_atapi_pc *pc = &floppy->request_sense_pc;
214 (void)ide_read_error(drive);
215 ide_floppy_create_request_sense_cmd(pc);
216 ide_queue_pc_head(drive, floppy->disk, pc, rq);
219 /* The usual interrupt handler called during a packet command. */
220 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
222 return ide_pc_intr(drive, idefloppy_pc_intr,
223 WAIT_FLOPPY_CMD, NULL, idefloppy_update_buffers,
224 idefloppy_retry_pc, ide_io_buffers);
228 * What we have here is a classic case of a top half / bottom half interrupt
229 * service routine. In interrupt mode, the device sends an interrupt to signal
230 * that it is ready to receive a packet. However, we need to delay about 2-3
231 * ticks before issuing the packet or we gets in trouble.
233 static int idefloppy_transfer_pc(ide_drive_t *drive)
235 /* Send the actual packet */
236 drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
238 /* Timeout for the packet command */
239 return WAIT_FLOPPY_CMD;
243 * Called as an interrupt (or directly). When the device says it's ready for a
244 * packet, we schedule the packet transfer to occur about 2-3 ticks later in
247 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
249 idefloppy_floppy_t *floppy = drive->driver_data;
250 ide_expiry_t *expiry;
251 unsigned int timeout;
254 * The following delay solves a problem with ATAPI Zip 100 drives
255 * where the Busy flag was apparently being deasserted before the
256 * unit was ready to receive data. This was happening on a
257 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
258 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
259 * used until after the packet is moved in about 50 msec.
261 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
262 timeout = floppy->ticks;
263 expiry = &idefloppy_transfer_pc;
265 timeout = WAIT_FLOPPY_CMD;
269 return ide_transfer_pc(drive, idefloppy_pc_intr, timeout, expiry);
272 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
273 struct ide_atapi_pc *pc)
275 /* supress error messages resulting from Medium not present */
276 if (floppy->sense_key == 0x02 &&
277 floppy->asc == 0x3a &&
278 floppy->ascq == 0x00)
281 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
282 "asc = %2x, ascq = %2x\n",
283 floppy->drive->name, pc->c[0], floppy->sense_key,
284 floppy->asc, floppy->ascq);
288 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
289 struct ide_atapi_pc *pc)
291 idefloppy_floppy_t *floppy = drive->driver_data;
293 if (floppy->failed_pc == NULL &&
294 pc->c[0] != GPCMD_REQUEST_SENSE)
295 floppy->failed_pc = pc;
297 /* Set the current packet command */
300 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
301 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
302 ide_floppy_report_error(floppy, pc);
304 pc->error = IDEFLOPPY_ERROR_GENERAL;
306 floppy->failed_pc = NULL;
307 drive->pc_callback(drive, 0);
311 debug_log("Retry number - %d\n", pc->retries);
315 return ide_issue_pc(drive, idefloppy_start_pc_transfer,
316 WAIT_FLOPPY_CMD, NULL);
319 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
322 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
328 /* A mode sense command is used to "sense" floppy parameters. */
329 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
331 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
334 pc->c[0] = GPCMD_MODE_SENSE_10;
336 pc->c[2] = page_code;
339 case IDEFLOPPY_CAPABILITIES_PAGE:
342 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
346 printk(KERN_ERR "ide-floppy: unsupported page code "
347 "in create_mode_sense_cmd\n");
349 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
350 pc->req_xfer = length;
353 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
354 struct ide_atapi_pc *pc, struct request *rq,
355 unsigned long sector)
357 int block = sector / floppy->bs_factor;
358 int blocks = rq->nr_sectors / floppy->bs_factor;
359 int cmd = rq_data_dir(rq);
361 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
365 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
366 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
367 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
369 memcpy(rq->cmd, pc->c, 12);
373 if (rq->cmd_flags & REQ_RW)
374 pc->flags |= PC_FLAG_WRITING;
376 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
377 pc->flags |= PC_FLAG_DMA_OK;
380 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
381 struct ide_atapi_pc *pc, struct request *rq)
384 memcpy(pc->c, rq->cmd, sizeof(pc->c));
387 if (rq->data_len && rq_data_dir(rq) == WRITE)
388 pc->flags |= PC_FLAG_WRITING;
391 pc->flags |= PC_FLAG_DMA_OK;
393 * possibly problematic, doesn't look like ide-floppy correctly
394 * handled scattered requests if dma fails...
396 pc->req_xfer = pc->buf_size = rq->data_len;
399 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
400 struct request *rq, sector_t block_s)
402 idefloppy_floppy_t *floppy = drive->driver_data;
403 ide_hwif_t *hwif = drive->hwif;
404 struct ide_atapi_pc *pc;
405 unsigned long block = (unsigned long)block_s;
407 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
408 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
409 rq->cmd[0], rq->cmd_type, rq->errors);
411 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
412 __func__, (long)rq->sector, rq->nr_sectors,
413 rq->current_nr_sectors);
415 if (rq->errors >= ERROR_MAX) {
416 if (floppy->failed_pc)
417 ide_floppy_report_error(floppy, floppy->failed_pc);
419 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
421 idefloppy_end_request(drive, 0, 0);
424 if (blk_fs_request(rq)) {
425 if (((long)rq->sector % floppy->bs_factor) ||
426 (rq->nr_sectors % floppy->bs_factor)) {
427 printk(KERN_ERR "%s: unsupported r/w request size\n",
429 idefloppy_end_request(drive, 0, 0);
432 pc = &floppy->queued_pc;
433 idefloppy_create_rw_cmd(floppy, pc, rq, block);
434 } else if (blk_special_request(rq)) {
435 pc = (struct ide_atapi_pc *) rq->buffer;
436 } else if (blk_pc_request(rq)) {
437 pc = &floppy->queued_pc;
438 idefloppy_blockpc_cmd(floppy, pc, rq);
440 blk_dump_rq_flags(rq,
441 "ide-floppy: unsupported command in queue");
442 idefloppy_end_request(drive, 0, 0);
446 ide_init_sg_cmd(drive, rq);
447 ide_map_sg(drive, rq);
449 pc->sg = hwif->sg_table;
450 pc->sg_cnt = hwif->sg_nents;
454 return idefloppy_issue_pc(drive, pc);
458 * Look at the flexible disk page parameters. We ignore the CHS capacity
459 * parameters and use the LBA parameters instead.
461 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
463 idefloppy_floppy_t *floppy = drive->driver_data;
464 struct gendisk *disk = floppy->disk;
465 struct ide_atapi_pc pc;
467 int capacity, lba_capacity;
468 u16 transfer_rate, sector_size, cyls, rpm;
471 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
473 if (ide_queue_pc_tail(drive, disk, &pc)) {
474 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
479 if (pc.buf[3] & 0x80)
480 drive->atapi_flags |= IDE_AFLAG_WP;
482 drive->atapi_flags &= ~IDE_AFLAG_WP;
484 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
488 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
489 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
490 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
491 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
492 heads = pc.buf[8 + 4];
493 sectors = pc.buf[8 + 5];
495 capacity = cyls * heads * sectors * sector_size;
497 if (memcmp(page, &floppy->flexible_disk_page, 32))
498 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
499 "%d sector size, %d rpm\n",
500 drive->name, capacity / 1024, cyls, heads,
501 sectors, transfer_rate / 8, sector_size, rpm);
503 memcpy(&floppy->flexible_disk_page, page, 32);
504 drive->bios_cyl = cyls;
505 drive->bios_head = heads;
506 drive->bios_sect = sectors;
507 lba_capacity = floppy->blocks * floppy->block_size;
509 if (capacity < lba_capacity) {
510 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
511 "bytes, but the drive only handles %d\n",
512 drive->name, lba_capacity, capacity);
513 floppy->blocks = floppy->block_size ?
514 capacity / floppy->block_size : 0;
520 * Determine if a media is present in the floppy drive, and if so, its LBA
523 static int ide_floppy_get_capacity(ide_drive_t *drive)
525 idefloppy_floppy_t *floppy = drive->driver_data;
526 struct gendisk *disk = floppy->disk;
527 struct ide_atapi_pc pc;
529 u8 header_len, desc_cnt;
530 int i, rc = 1, blocks, length;
533 drive->bios_head = drive->bios_sect = 0;
535 floppy->bs_factor = 1;
536 set_capacity(floppy->disk, 0);
538 ide_floppy_create_read_capacity_cmd(&pc);
539 if (ide_queue_pc_tail(drive, disk, &pc)) {
540 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
543 header_len = pc.buf[3];
544 cap_desc = &pc.buf[4];
545 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
547 for (i = 0; i < desc_cnt; i++) {
548 unsigned int desc_start = 4 + i*8;
550 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
551 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
553 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
554 i, blocks * length / 1024, blocks, length);
559 * the code below is valid only for the 1st descriptor, ie i=0
562 switch (pc.buf[desc_start + 4] & 0x03) {
563 /* Clik! drive returns this instead of CAPACITY_CURRENT */
564 case CAPACITY_UNFORMATTED:
565 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
567 * If it is not a clik drive, break out
568 * (maintains previous driver behaviour)
571 case CAPACITY_CURRENT:
572 /* Normal Zip/LS-120 disks */
573 if (memcmp(cap_desc, &floppy->cap_desc, 8))
574 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
575 "sector size\n", drive->name,
576 blocks * length / 1024, blocks, length);
577 memcpy(&floppy->cap_desc, cap_desc, 8);
579 if (!length || length % 512) {
580 printk(KERN_NOTICE "%s: %d bytes block size "
581 "not supported\n", drive->name, length);
583 floppy->blocks = blocks;
584 floppy->block_size = length;
585 floppy->bs_factor = length / 512;
586 if (floppy->bs_factor != 1)
587 printk(KERN_NOTICE "%s: warning: non "
588 "512 bytes block size not "
594 case CAPACITY_NO_CARTRIDGE:
596 * This is a KERN_ERR so it appears on screen
597 * for the user to see
599 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
601 case CAPACITY_INVALID:
602 printk(KERN_ERR "%s: Invalid capacity for disk "
603 "in drive\n", drive->name);
606 debug_log("Descriptor 0 Code: %d\n",
607 pc.buf[desc_start + 4] & 0x03);
610 /* Clik! disk does not support get_flexible_disk_page */
611 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
612 (void) ide_floppy_get_flexible_disk_page(drive);
614 set_capacity(disk, floppy->blocks * floppy->bs_factor);
619 static sector_t idefloppy_capacity(ide_drive_t *drive)
621 idefloppy_floppy_t *floppy = drive->driver_data;
622 unsigned long capacity = floppy->blocks * floppy->bs_factor;
627 #ifdef CONFIG_IDE_PROC_FS
628 ide_devset_rw_field(bios_cyl, bios_cyl);
629 ide_devset_rw_field(bios_head, bios_head);
630 ide_devset_rw_field(bios_sect, bios_sect);
632 static int get_ticks(ide_drive_t *drive)
634 idefloppy_floppy_t *floppy = drive->driver_data;
635 return floppy->ticks;
638 static int set_ticks(ide_drive_t *drive, int arg)
640 idefloppy_floppy_t *floppy = drive->driver_data;
645 IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks);
647 static const struct ide_proc_devset idefloppy_settings[] = {
648 IDE_PROC_DEVSET(bios_cyl, 0, 1023),
649 IDE_PROC_DEVSET(bios_head, 0, 255),
650 IDE_PROC_DEVSET(bios_sect, 0, 63),
651 IDE_PROC_DEVSET(ticks, 0, 255),
656 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
661 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
663 drive->pc_callback = ide_floppy_callback;
665 if (((gcw[0] & 0x60) >> 5) == 1)
666 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
668 * We used to check revisions here. At this point however I'm giving up.
669 * Just assume they are all broken, its easier.
671 * The actual reason for the workarounds was likely a driver bug after
672 * all rather than a firmware bug, and the workaround below used to hide
673 * it. It should be fixed as of version 1.9, but to be on the safe side
674 * we'll leave the limitation below for the 2.2.x tree.
676 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
677 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
678 /* This value will be visible in the /proc/ide/hdx/settings */
679 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
680 blk_queue_max_sectors(drive->queue, 64);
684 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
685 * nasty clicking noises without it, so please don't remove this.
687 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
688 blk_queue_max_sectors(drive->queue, 64);
689 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
690 /* IOMEGA Clik! drives do not support lock/unlock commands */
691 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
694 (void) ide_floppy_get_capacity(drive);
696 ide_proc_register_driver(drive, floppy->driver);
699 static void ide_floppy_remove(ide_drive_t *drive)
701 idefloppy_floppy_t *floppy = drive->driver_data;
702 struct gendisk *g = floppy->disk;
704 ide_proc_unregister_driver(drive, floppy->driver);
708 ide_floppy_put(floppy);
711 static void idefloppy_cleanup_obj(struct kref *kref)
713 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
714 ide_drive_t *drive = floppy->drive;
715 struct gendisk *g = floppy->disk;
717 drive->driver_data = NULL;
718 g->private_data = NULL;
723 #ifdef CONFIG_IDE_PROC_FS
724 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
725 int count, int *eof, void *data)
727 ide_drive_t*drive = (ide_drive_t *)data;
730 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
731 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
734 static ide_proc_entry_t idefloppy_proc[] = {
735 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
736 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
737 { NULL, 0, NULL, NULL }
739 #endif /* CONFIG_IDE_PROC_FS */
741 static int ide_floppy_probe(ide_drive_t *);
743 static ide_driver_t idefloppy_driver = {
745 .owner = THIS_MODULE,
746 .name = "ide-floppy",
747 .bus = &ide_bus_type,
749 .probe = ide_floppy_probe,
750 .remove = ide_floppy_remove,
751 .version = IDEFLOPPY_VERSION,
753 .do_request = idefloppy_do_request,
754 .end_request = idefloppy_end_request,
755 .error = __ide_error,
756 #ifdef CONFIG_IDE_PROC_FS
757 .proc = idefloppy_proc,
758 .settings = idefloppy_settings,
762 static int idefloppy_open(struct inode *inode, struct file *filp)
764 struct gendisk *disk = inode->i_bdev->bd_disk;
765 struct ide_floppy_obj *floppy;
769 debug_log("Reached %s\n", __func__);
771 floppy = ide_floppy_get(disk);
775 drive = floppy->drive;
779 if (floppy->openers == 1) {
780 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
783 if (ide_do_test_unit_ready(drive, disk))
784 ide_do_start_stop(drive, disk, 1);
786 if (ide_floppy_get_capacity(drive)
787 && (filp->f_flags & O_NDELAY) == 0
789 * Allow O_NDELAY to open a drive without a disk, or with an
790 * unreadable disk, so that we can get the format capacity
791 * of the drive or begin the format - Sam
798 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
803 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
804 ide_set_media_lock(drive, disk, 1);
805 check_disk_change(inode->i_bdev);
806 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
814 ide_floppy_put(floppy);
818 static int idefloppy_release(struct inode *inode, struct file *filp)
820 struct gendisk *disk = inode->i_bdev->bd_disk;
821 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
822 ide_drive_t *drive = floppy->drive;
824 debug_log("Reached %s\n", __func__);
826 if (floppy->openers == 1) {
827 ide_set_media_lock(drive, disk, 0);
828 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
833 ide_floppy_put(floppy);
838 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
840 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
841 ide_drive_t *drive = floppy->drive;
843 geo->heads = drive->bios_head;
844 geo->sectors = drive->bios_sect;
845 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
849 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
850 unsigned long arg, unsigned int cmd)
852 idefloppy_floppy_t *floppy = drive->driver_data;
853 struct gendisk *disk = floppy->disk;
854 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
856 if (floppy->openers > 1)
859 ide_set_media_lock(drive, disk, prevent);
861 if (cmd == CDROMEJECT)
862 ide_do_start_stop(drive, disk, 2);
867 static int idefloppy_ioctl(struct inode *inode, struct file *file,
868 unsigned int cmd, unsigned long arg)
870 struct block_device *bdev = inode->i_bdev;
871 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
872 ide_drive_t *drive = floppy->drive;
873 struct ide_atapi_pc pc;
874 void __user *argp = (void __user *)arg;
877 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
878 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
880 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
885 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
886 * and CDROM_SEND_PACKET (legacy) ioctls
888 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
889 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
890 bdev->bd_disk, cmd, argp);
893 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
898 static int idefloppy_media_changed(struct gendisk *disk)
900 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
901 ide_drive_t *drive = floppy->drive;
904 /* do not scan partitions twice if this is a removable device */
909 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
910 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
914 static int idefloppy_revalidate_disk(struct gendisk *disk)
916 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
917 set_capacity(disk, idefloppy_capacity(floppy->drive));
921 static struct block_device_operations idefloppy_ops = {
922 .owner = THIS_MODULE,
923 .open = idefloppy_open,
924 .release = idefloppy_release,
925 .ioctl = idefloppy_ioctl,
926 .getgeo = idefloppy_getgeo,
927 .media_changed = idefloppy_media_changed,
928 .revalidate_disk = idefloppy_revalidate_disk
931 static int ide_floppy_probe(ide_drive_t *drive)
933 idefloppy_floppy_t *floppy;
936 if (!strstr("ide-floppy", drive->driver_req))
939 if (drive->media != ide_floppy)
942 if (!ide_check_atapi_device(drive, DRV_NAME)) {
943 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
944 " of ide-floppy\n", drive->name);
947 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
949 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
950 " structure\n", drive->name);
954 g = alloc_disk(1 << PARTN_BITS);
956 goto out_free_floppy;
958 ide_init_disk(g, drive);
960 kref_init(&floppy->kref);
962 floppy->drive = drive;
963 floppy->driver = &idefloppy_driver;
966 g->private_data = &floppy->driver;
968 drive->driver_data = floppy;
970 idefloppy_setup(drive, floppy);
972 g->minors = 1 << PARTN_BITS;
973 g->driverfs_dev = &drive->gendev;
974 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
975 g->fops = &idefloppy_ops;
986 static void __exit idefloppy_exit(void)
988 driver_unregister(&idefloppy_driver.gen_driver);
991 static int __init idefloppy_init(void)
993 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
994 return driver_register(&idefloppy_driver.gen_driver);
997 MODULE_ALIAS("ide:*m-floppy*");
998 MODULE_ALIAS("ide-floppy");
999 module_init(idefloppy_init);
1000 module_exit(idefloppy_exit);
1001 MODULE_LICENSE("GPL");
1002 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");