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 /* Some drives require a longer irq timeout. */
66 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
69 * After each failed packet command we issue a request sense command and retry
70 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
72 #define IDEFLOPPY_MAX_PC_RETRIES 3
74 /* format capacities descriptor codes */
75 #define CAPACITY_INVALID 0x00
76 #define CAPACITY_UNFORMATTED 0x01
77 #define CAPACITY_CURRENT 0x02
78 #define CAPACITY_NO_CARTRIDGE 0x03
80 #define IDEFLOPPY_TICKS_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)
165 idefloppy_floppy_t *floppy = drive->driver_data;
166 struct ide_atapi_pc *pc = floppy->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) {
178 u8 *buf = floppy->pc->buf;
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 void ide_floppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
203 pc->c[0] = GPCMD_REQUEST_SENSE;
209 * Called when an error was detected during the last packet command. We queue a
210 * request sense packet command in the head of the request list.
212 static void idefloppy_retry_pc(ide_drive_t *drive)
214 struct ide_floppy_obj *floppy = drive->driver_data;
215 struct request *rq = &floppy->request_sense_rq;
216 struct ide_atapi_pc *pc = &floppy->request_sense_pc;
218 (void)ide_read_error(drive);
219 ide_floppy_create_request_sense_cmd(pc);
220 ide_queue_pc_head(drive, floppy->disk, pc, rq);
223 /* The usual interrupt handler called during a packet command. */
224 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
226 idefloppy_floppy_t *floppy = drive->driver_data;
228 return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
229 IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
230 idefloppy_retry_pc, NULL, ide_io_buffers);
234 * What we have here is a classic case of a top half / bottom half interrupt
235 * service routine. In interrupt mode, the device sends an interrupt to signal
236 * that it is ready to receive a packet. However, we need to delay about 2-3
237 * ticks before issuing the packet or we gets in trouble.
239 static int idefloppy_transfer_pc(ide_drive_t *drive)
241 idefloppy_floppy_t *floppy = drive->driver_data;
243 /* Send the actual packet */
244 drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
246 /* Timeout for the packet command */
247 return IDEFLOPPY_WAIT_CMD;
252 * Called as an interrupt (or directly). When the device says it's ready for a
253 * packet, we schedule the packet transfer to occur about 2-3 ticks later in
256 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
258 idefloppy_floppy_t *floppy = drive->driver_data;
259 struct ide_atapi_pc *pc = floppy->pc;
260 ide_expiry_t *expiry;
261 unsigned int timeout;
264 * The following delay solves a problem with ATAPI Zip 100 drives
265 * where the Busy flag was apparently being deasserted before the
266 * unit was ready to receive data. This was happening on a
267 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
268 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
269 * used until after the packet is moved in about 50 msec.
271 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
272 timeout = floppy->ticks;
273 expiry = &idefloppy_transfer_pc;
275 timeout = IDEFLOPPY_WAIT_CMD;
279 return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
282 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
283 struct ide_atapi_pc *pc)
285 /* supress error messages resulting from Medium not present */
286 if (floppy->sense_key == 0x02 &&
287 floppy->asc == 0x3a &&
288 floppy->ascq == 0x00)
291 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
292 "asc = %2x, ascq = %2x\n",
293 floppy->drive->name, pc->c[0], floppy->sense_key,
294 floppy->asc, floppy->ascq);
298 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
299 struct ide_atapi_pc *pc)
301 idefloppy_floppy_t *floppy = drive->driver_data;
303 if (floppy->failed_pc == NULL &&
304 pc->c[0] != GPCMD_REQUEST_SENSE)
305 floppy->failed_pc = pc;
306 /* Set the current packet command */
309 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
310 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
311 ide_floppy_report_error(floppy, pc);
313 pc->error = IDEFLOPPY_ERROR_GENERAL;
315 floppy->failed_pc = NULL;
316 drive->pc_callback(drive);
320 debug_log("Retry number - %d\n", pc->retries);
324 return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
325 IDEFLOPPY_WAIT_CMD, NULL);
328 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
330 debug_log("creating prevent removal command, prevent = %d\n", prevent);
333 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
337 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
340 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
346 /* A mode sense command is used to "sense" floppy parameters. */
347 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
349 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
352 pc->c[0] = GPCMD_MODE_SENSE_10;
354 pc->c[2] = page_code;
357 case IDEFLOPPY_CAPABILITIES_PAGE:
360 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
364 printk(KERN_ERR "ide-floppy: unsupported page code "
365 "in create_mode_sense_cmd\n");
367 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
368 pc->req_xfer = length;
371 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
374 pc->c[0] = GPCMD_START_STOP_UNIT;
378 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
379 struct ide_atapi_pc *pc, struct request *rq,
380 unsigned long sector)
382 int block = sector / floppy->bs_factor;
383 int blocks = rq->nr_sectors / floppy->bs_factor;
384 int cmd = rq_data_dir(rq);
386 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
390 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
391 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
392 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
394 memcpy(rq->cmd, pc->c, 12);
398 if (rq->cmd_flags & REQ_RW)
399 pc->flags |= PC_FLAG_WRITING;
401 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
402 pc->flags |= PC_FLAG_DMA_OK;
405 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
406 struct ide_atapi_pc *pc, struct request *rq)
409 memcpy(pc->c, rq->cmd, sizeof(pc->c));
412 if (rq->data_len && rq_data_dir(rq) == WRITE)
413 pc->flags |= PC_FLAG_WRITING;
416 pc->flags |= PC_FLAG_DMA_OK;
418 * possibly problematic, doesn't look like ide-floppy correctly
419 * handled scattered requests if dma fails...
421 pc->req_xfer = pc->buf_size = rq->data_len;
424 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
425 struct request *rq, sector_t block_s)
427 idefloppy_floppy_t *floppy = drive->driver_data;
428 ide_hwif_t *hwif = drive->hwif;
429 struct ide_atapi_pc *pc;
430 unsigned long block = (unsigned long)block_s;
432 debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
433 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
434 rq->cmd[0], rq->cmd_type, rq->errors);
436 debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
437 __func__, (long)rq->sector, rq->nr_sectors,
438 rq->current_nr_sectors);
440 if (rq->errors >= ERROR_MAX) {
441 if (floppy->failed_pc)
442 ide_floppy_report_error(floppy, floppy->failed_pc);
444 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
446 idefloppy_end_request(drive, 0, 0);
449 if (blk_fs_request(rq)) {
450 if (((long)rq->sector % floppy->bs_factor) ||
451 (rq->nr_sectors % floppy->bs_factor)) {
452 printk(KERN_ERR "%s: unsupported r/w request size\n",
454 idefloppy_end_request(drive, 0, 0);
457 pc = &floppy->queued_pc;
458 idefloppy_create_rw_cmd(floppy, pc, rq, block);
459 } else if (blk_special_request(rq)) {
460 pc = (struct ide_atapi_pc *) rq->buffer;
461 } else if (blk_pc_request(rq)) {
462 pc = &floppy->queued_pc;
463 idefloppy_blockpc_cmd(floppy, pc, rq);
465 blk_dump_rq_flags(rq,
466 "ide-floppy: unsupported command in queue");
467 idefloppy_end_request(drive, 0, 0);
471 ide_init_sg_cmd(drive, rq);
472 ide_map_sg(drive, rq);
474 pc->sg = hwif->sg_table;
475 pc->sg_cnt = hwif->sg_nents;
479 return idefloppy_issue_pc(drive, pc);
483 * Look at the flexible disk page parameters. We ignore the CHS capacity
484 * parameters and use the LBA parameters instead.
486 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
488 idefloppy_floppy_t *floppy = drive->driver_data;
489 struct gendisk *disk = floppy->disk;
490 struct ide_atapi_pc pc;
492 int capacity, lba_capacity;
493 u16 transfer_rate, sector_size, cyls, rpm;
496 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
498 if (ide_queue_pc_tail(drive, disk, &pc)) {
499 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
504 if (pc.buf[3] & 0x80)
505 drive->atapi_flags |= IDE_AFLAG_WP;
507 drive->atapi_flags &= ~IDE_AFLAG_WP;
509 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
513 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
514 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
515 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
516 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
517 heads = pc.buf[8 + 4];
518 sectors = pc.buf[8 + 5];
520 capacity = cyls * heads * sectors * sector_size;
522 if (memcmp(page, &floppy->flexible_disk_page, 32))
523 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
524 "%d sector size, %d rpm\n",
525 drive->name, capacity / 1024, cyls, heads,
526 sectors, transfer_rate / 8, sector_size, rpm);
528 memcpy(&floppy->flexible_disk_page, page, 32);
529 drive->bios_cyl = cyls;
530 drive->bios_head = heads;
531 drive->bios_sect = sectors;
532 lba_capacity = floppy->blocks * floppy->block_size;
534 if (capacity < lba_capacity) {
535 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
536 "bytes, but the drive only handles %d\n",
537 drive->name, lba_capacity, capacity);
538 floppy->blocks = floppy->block_size ?
539 capacity / floppy->block_size : 0;
545 * Determine if a media is present in the floppy drive, and if so, its LBA
548 static int ide_floppy_get_capacity(ide_drive_t *drive)
550 idefloppy_floppy_t *floppy = drive->driver_data;
551 struct gendisk *disk = floppy->disk;
552 struct ide_atapi_pc pc;
554 u8 header_len, desc_cnt;
555 int i, rc = 1, blocks, length;
558 drive->bios_head = drive->bios_sect = 0;
560 floppy->bs_factor = 1;
561 set_capacity(floppy->disk, 0);
563 ide_floppy_create_read_capacity_cmd(&pc);
564 if (ide_queue_pc_tail(drive, disk, &pc)) {
565 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
568 header_len = pc.buf[3];
569 cap_desc = &pc.buf[4];
570 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
572 for (i = 0; i < desc_cnt; i++) {
573 unsigned int desc_start = 4 + i*8;
575 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
576 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
578 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
579 i, blocks * length / 1024, blocks, length);
584 * the code below is valid only for the 1st descriptor, ie i=0
587 switch (pc.buf[desc_start + 4] & 0x03) {
588 /* Clik! drive returns this instead of CAPACITY_CURRENT */
589 case CAPACITY_UNFORMATTED:
590 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
592 * If it is not a clik drive, break out
593 * (maintains previous driver behaviour)
596 case CAPACITY_CURRENT:
597 /* Normal Zip/LS-120 disks */
598 if (memcmp(cap_desc, &floppy->cap_desc, 8))
599 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
600 "sector size\n", drive->name,
601 blocks * length / 1024, blocks, length);
602 memcpy(&floppy->cap_desc, cap_desc, 8);
604 if (!length || length % 512) {
605 printk(KERN_NOTICE "%s: %d bytes block size "
606 "not supported\n", drive->name, length);
608 floppy->blocks = blocks;
609 floppy->block_size = length;
610 floppy->bs_factor = length / 512;
611 if (floppy->bs_factor != 1)
612 printk(KERN_NOTICE "%s: warning: non "
613 "512 bytes block size not "
619 case CAPACITY_NO_CARTRIDGE:
621 * This is a KERN_ERR so it appears on screen
622 * for the user to see
624 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
626 case CAPACITY_INVALID:
627 printk(KERN_ERR "%s: Invalid capacity for disk "
628 "in drive\n", drive->name);
631 debug_log("Descriptor 0 Code: %d\n",
632 pc.buf[desc_start + 4] & 0x03);
635 /* Clik! disk does not support get_flexible_disk_page */
636 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
637 (void) ide_floppy_get_flexible_disk_page(drive);
639 set_capacity(disk, floppy->blocks * floppy->bs_factor);
644 static sector_t idefloppy_capacity(ide_drive_t *drive)
646 idefloppy_floppy_t *floppy = drive->driver_data;
647 unsigned long capacity = floppy->blocks * floppy->bs_factor;
652 #ifdef CONFIG_IDE_PROC_FS
653 ide_devset_rw(bios_cyl, 0, 1023, bios_cyl);
654 ide_devset_rw(bios_head, 0, 255, bios_head);
655 ide_devset_rw(bios_sect, 0, 63, bios_sect);
657 static int get_ticks(ide_drive_t *drive)
659 idefloppy_floppy_t *floppy = drive->driver_data;
660 return floppy->ticks;
663 static int set_ticks(ide_drive_t *drive, int arg)
665 idefloppy_floppy_t *floppy = drive->driver_data;
670 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
672 static const struct ide_devset *idefloppy_settings[] = {
673 &ide_devset_bios_cyl,
674 &ide_devset_bios_head,
675 &ide_devset_bios_sect,
681 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
686 *((u16 *)&gcw) = id[ATA_ID_CONFIG];
688 drive->pc_callback = ide_floppy_callback;
690 if (((gcw[0] & 0x60) >> 5) == 1)
691 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
693 * We used to check revisions here. At this point however I'm giving up.
694 * Just assume they are all broken, its easier.
696 * The actual reason for the workarounds was likely a driver bug after
697 * all rather than a firmware bug, and the workaround below used to hide
698 * it. It should be fixed as of version 1.9, but to be on the safe side
699 * we'll leave the limitation below for the 2.2.x tree.
701 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
702 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
703 /* This value will be visible in the /proc/ide/hdx/settings */
704 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
705 blk_queue_max_sectors(drive->queue, 64);
709 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
710 * nasty clicking noises without it, so please don't remove this.
712 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
713 blk_queue_max_sectors(drive->queue, 64);
714 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
717 (void) ide_floppy_get_capacity(drive);
719 ide_proc_register_driver(drive, floppy->driver);
722 static void ide_floppy_remove(ide_drive_t *drive)
724 idefloppy_floppy_t *floppy = drive->driver_data;
725 struct gendisk *g = floppy->disk;
727 ide_proc_unregister_driver(drive, floppy->driver);
731 ide_floppy_put(floppy);
734 static void idefloppy_cleanup_obj(struct kref *kref)
736 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
737 ide_drive_t *drive = floppy->drive;
738 struct gendisk *g = floppy->disk;
740 drive->driver_data = NULL;
741 g->private_data = NULL;
746 #ifdef CONFIG_IDE_PROC_FS
747 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
748 int count, int *eof, void *data)
750 ide_drive_t*drive = (ide_drive_t *)data;
753 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
754 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
757 static ide_proc_entry_t idefloppy_proc[] = {
758 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
759 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
760 { NULL, 0, NULL, NULL }
762 #endif /* CONFIG_IDE_PROC_FS */
764 static int ide_floppy_probe(ide_drive_t *);
766 static ide_driver_t idefloppy_driver = {
768 .owner = THIS_MODULE,
769 .name = "ide-floppy",
770 .bus = &ide_bus_type,
772 .probe = ide_floppy_probe,
773 .remove = ide_floppy_remove,
774 .version = IDEFLOPPY_VERSION,
776 .do_request = idefloppy_do_request,
777 .end_request = idefloppy_end_request,
778 .error = __ide_error,
779 #ifdef CONFIG_IDE_PROC_FS
780 .proc = idefloppy_proc,
781 .settings = idefloppy_settings,
785 static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
787 struct ide_floppy_obj *floppy = drive->driver_data;
788 struct ide_atapi_pc pc;
790 /* IOMEGA Clik! drives do not support lock/unlock commands */
791 if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
792 idefloppy_create_prevent_cmd(&pc, on);
793 (void)ide_queue_pc_tail(drive, floppy->disk, &pc);
797 static int idefloppy_open(struct inode *inode, struct file *filp)
799 struct gendisk *disk = inode->i_bdev->bd_disk;
800 struct ide_floppy_obj *floppy;
802 struct ide_atapi_pc pc;
805 debug_log("Reached %s\n", __func__);
807 floppy = ide_floppy_get(disk);
811 drive = floppy->drive;
815 if (floppy->openers == 1) {
816 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
820 pc.c[0] = GPCMD_TEST_UNIT_READY;
822 if (ide_queue_pc_tail(drive, disk, &pc)) {
823 idefloppy_create_start_stop_cmd(&pc, 1);
824 (void)ide_queue_pc_tail(drive, disk, &pc);
827 if (ide_floppy_get_capacity(drive)
828 && (filp->f_flags & O_NDELAY) == 0
830 * Allow O_NDELAY to open a drive without a disk, or with an
831 * unreadable disk, so that we can get the format capacity
832 * of the drive or begin the format - Sam
839 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
844 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
845 ide_floppy_set_media_lock(drive, 1);
846 check_disk_change(inode->i_bdev);
847 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
855 ide_floppy_put(floppy);
859 static int idefloppy_release(struct inode *inode, struct file *filp)
861 struct gendisk *disk = inode->i_bdev->bd_disk;
862 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
863 ide_drive_t *drive = floppy->drive;
865 debug_log("Reached %s\n", __func__);
867 if (floppy->openers == 1) {
868 ide_floppy_set_media_lock(drive, 0);
869 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
874 ide_floppy_put(floppy);
879 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
881 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
882 ide_drive_t *drive = floppy->drive;
884 geo->heads = drive->bios_head;
885 geo->sectors = drive->bios_sect;
886 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
890 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
891 unsigned long arg, unsigned int cmd)
893 idefloppy_floppy_t *floppy = drive->driver_data;
894 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
896 if (floppy->openers > 1)
899 ide_floppy_set_media_lock(drive, prevent);
901 if (cmd == CDROMEJECT) {
902 idefloppy_create_start_stop_cmd(pc, 2);
903 (void)ide_queue_pc_tail(drive, floppy->disk, pc);
909 static int idefloppy_ioctl(struct inode *inode, struct file *file,
910 unsigned int cmd, unsigned long arg)
912 struct block_device *bdev = inode->i_bdev;
913 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
914 ide_drive_t *drive = floppy->drive;
915 struct ide_atapi_pc pc;
916 void __user *argp = (void __user *)arg;
919 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
920 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
922 err = ide_floppy_format_ioctl(drive, file, cmd, argp);
927 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
928 * and CDROM_SEND_PACKET (legacy) ioctls
930 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
931 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
932 bdev->bd_disk, cmd, argp);
935 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
940 static int idefloppy_media_changed(struct gendisk *disk)
942 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
943 ide_drive_t *drive = floppy->drive;
946 /* do not scan partitions twice if this is a removable device */
951 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
952 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
956 static int idefloppy_revalidate_disk(struct gendisk *disk)
958 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
959 set_capacity(disk, idefloppy_capacity(floppy->drive));
963 static struct block_device_operations idefloppy_ops = {
964 .owner = THIS_MODULE,
965 .open = idefloppy_open,
966 .release = idefloppy_release,
967 .ioctl = idefloppy_ioctl,
968 .getgeo = idefloppy_getgeo,
969 .media_changed = idefloppy_media_changed,
970 .revalidate_disk = idefloppy_revalidate_disk
973 static int ide_floppy_probe(ide_drive_t *drive)
975 idefloppy_floppy_t *floppy;
978 if (!strstr("ide-floppy", drive->driver_req))
981 if (drive->media != ide_floppy)
984 if (!ide_check_atapi_device(drive, DRV_NAME)) {
985 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
986 " of ide-floppy\n", drive->name);
989 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
991 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
992 " structure\n", drive->name);
996 g = alloc_disk(1 << PARTN_BITS);
998 goto out_free_floppy;
1000 ide_init_disk(g, drive);
1002 kref_init(&floppy->kref);
1004 floppy->drive = drive;
1005 floppy->driver = &idefloppy_driver;
1008 g->private_data = &floppy->driver;
1010 drive->driver_data = floppy;
1012 idefloppy_setup(drive, floppy);
1014 g->minors = 1 << PARTN_BITS;
1015 g->driverfs_dev = &drive->gendev;
1016 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1017 g->fops = &idefloppy_ops;
1028 static void __exit idefloppy_exit(void)
1030 driver_unregister(&idefloppy_driver.gen_driver);
1033 static int __init idefloppy_init(void)
1035 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1036 return driver_register(&idefloppy_driver.gen_driver);
1039 MODULE_ALIAS("ide:*m-floppy*");
1040 MODULE_ALIAS("ide-floppy");
1041 module_init(idefloppy_init);
1042 module_exit(idefloppy_exit);
1043 MODULE_LICENSE("GPL");
1044 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");