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 IDEFLOPPY_VERSION "1.00"
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/string.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/major.h>
29 #include <linux/errno.h>
30 #include <linux/genhd.h>
31 #include <linux/slab.h>
32 #include <linux/cdrom.h>
33 #include <linux/ide.h>
34 #include <linux/bitops.h>
35 #include <linux/mutex.h>
37 #include <scsi/scsi_ioctl.h>
39 #include <asm/byteorder.h>
40 #include <linux/irq.h>
41 #include <linux/uaccess.h>
43 #include <asm/unaligned.h>
45 /* define to see debug info */
46 #define IDEFLOPPY_DEBUG_LOG 0
48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
49 #define IDEFLOPPY_DEBUG(fmt, args...)
51 #if IDEFLOPPY_DEBUG_LOG
52 #define debug_log(fmt, args...) \
53 printk(KERN_INFO "ide-floppy: " fmt, ## args)
55 #define debug_log(fmt, args...) do {} while (0)
59 /* Some drives require a longer irq timeout. */
60 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
63 * After each failed packet command we issue a request sense command and retry
64 * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
66 #define IDEFLOPPY_MAX_PC_RETRIES 3
69 * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
72 #define IDEFLOPPY_PC_BUFFER_SIZE 256
75 * In various places in the driver, we need to allocate storage for packet
76 * commands and requests, which will remain valid while we leave the driver to
77 * wait for an interrupt or a timeout event.
79 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
81 /* format capacities descriptor codes */
82 #define CAPACITY_INVALID 0x00
83 #define CAPACITY_UNFORMATTED 0x01
84 #define CAPACITY_CURRENT 0x02
85 #define CAPACITY_NO_CARTRIDGE 0x03
88 * Most of our global data which we need to save even as we leave the driver
89 * due to an interrupt or a timer event is stored in a variable of type
90 * idefloppy_floppy_t, defined below.
92 typedef struct ide_floppy_obj {
97 unsigned int openers; /* protected by BKL for now */
99 /* Current packet command */
100 struct ide_atapi_pc *pc;
101 /* Last failed packet command */
102 struct ide_atapi_pc *failed_pc;
103 /* Packet command stack */
104 struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
105 /* Next free packet command storage space */
107 struct request rq_stack[IDEFLOPPY_PC_STACK];
108 /* We implement a circular array */
111 /* Last error information */
112 u8 sense_key, asc, ascq;
113 /* delay this long before sending packet command */
115 int progress_indication;
117 /* Device information */
119 int blocks, block_size, bs_factor;
120 /* Last format capacity descriptor */
122 /* Copy of the flexible disk page */
123 u8 flexible_disk_page[32];
126 /* Supports format progress report */
128 /* Status/Action flags */
130 } idefloppy_floppy_t;
132 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
134 /* Floppy flag bits values. */
136 /* DRQ interrupt device */
137 IDEFLOPPY_FLAG_DRQ_INTERRUPT = (1 << 0),
138 /* Media may have changed */
139 IDEFLOPPY_FLAG_MEDIA_CHANGED = (1 << 1),
140 /* Format in progress */
141 IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS = (1 << 2),
142 /* Avoid commands not supported in Clik drive */
143 IDEFLOPPY_FLAG_CLIK_DRIVE = (1 << 3),
144 /* Requires BH algorithm for packets */
145 IDEFLOPPY_FLAG_ZIP_DRIVE = (1 << 4),
148 /* Defines for the MODE SENSE command */
149 #define MODE_SENSE_CURRENT 0x00
150 #define MODE_SENSE_CHANGEABLE 0x01
151 #define MODE_SENSE_DEFAULT 0x02
152 #define MODE_SENSE_SAVED 0x03
154 /* IOCTLs used in low-level formatting. */
155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
157 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
160 /* Error code returned in rq->errors to the higher part of the driver. */
161 #define IDEFLOPPY_ERROR_GENERAL 101
164 * Pages of the SELECT SENSE / MODE SENSE packet commands.
165 * See SFF-8070i spec.
167 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
170 static DEFINE_MUTEX(idefloppy_ref_mutex);
172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
174 #define ide_floppy_g(disk) \
175 container_of((disk)->private_data, struct ide_floppy_obj, driver)
177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
179 struct ide_floppy_obj *floppy = NULL;
181 mutex_lock(&idefloppy_ref_mutex);
182 floppy = ide_floppy_g(disk);
184 kref_get(&floppy->kref);
185 mutex_unlock(&idefloppy_ref_mutex);
189 static void idefloppy_cleanup_obj(struct kref *);
191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
193 mutex_lock(&idefloppy_ref_mutex);
194 kref_put(&floppy->kref, idefloppy_cleanup_obj);
195 mutex_unlock(&idefloppy_ref_mutex);
199 * Used to finish servicing a request. For read/write requests, we will call
200 * ide_end_request to pass to the next buffer.
202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
204 idefloppy_floppy_t *floppy = drive->driver_data;
205 struct request *rq = HWGROUP(drive)->rq;
208 debug_log("Reached %s\n", __func__);
211 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
212 case 1: error = 0; break;
213 default: error = uptodate;
216 floppy->failed_pc = NULL;
217 /* Why does this happen? */
220 if (!blk_special_request(rq)) {
221 /* our real local end request function */
222 ide_end_request(drive, uptodate, nsecs);
226 /* fixme: need to move this local also */
227 ide_end_drive_cmd(drive, 0, 0);
231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
232 unsigned int bcount, int direction)
234 ide_hwif_t *hwif = drive->hwif;
235 struct request *rq = pc->rq;
236 struct req_iterator iter;
237 struct bio_vec *bvec;
242 rq_for_each_segment(bvec, rq, iter) {
246 count = min(bvec->bv_len, bcount);
248 data = bvec_kmap_irq(bvec, &flags);
250 hwif->tp_ops->output_data(drive, NULL, data, count);
252 hwif->tp_ops->input_data(drive, NULL, data, count);
253 bvec_kunmap_irq(data, &flags);
256 pc->b_count += count;
260 idefloppy_end_request(drive, 1, done >> 9);
263 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
264 drive->name, __func__, bcount);
265 ide_pad_transfer(drive, direction, bcount);
269 static void idefloppy_update_buffers(ide_drive_t *drive,
270 struct ide_atapi_pc *pc)
272 struct request *rq = pc->rq;
273 struct bio *bio = rq->bio;
275 while ((bio = rq->bio) != NULL)
276 idefloppy_end_request(drive, 1, 0);
280 * Generate a new packet command request in front of the request queue, before
281 * the current request so that it will be processed immediately, on the next
282 * pass through the driver.
284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
287 struct ide_floppy_obj *floppy = drive->driver_data;
289 blk_rq_init(NULL, rq);
290 rq->buffer = (char *) pc;
291 rq->cmd_type = REQ_TYPE_SPECIAL;
292 rq->cmd_flags |= REQ_PREEMPT;
293 rq->rq_disk = floppy->disk;
294 memcpy(rq->cmd, pc->c, 12);
295 ide_do_drive_cmd(drive, rq);
298 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
300 idefloppy_floppy_t *floppy = drive->driver_data;
302 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
303 floppy->pc_stack_index = 0;
304 return (&floppy->pc_stack[floppy->pc_stack_index++]);
307 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
309 idefloppy_floppy_t *floppy = drive->driver_data;
311 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
312 floppy->rq_stack_index = 0;
313 return (&floppy->rq_stack[floppy->rq_stack_index++]);
316 static void ide_floppy_callback(ide_drive_t *drive)
318 idefloppy_floppy_t *floppy = drive->driver_data;
319 struct ide_atapi_pc *pc = floppy->pc;
320 int uptodate = pc->error ? 0 : 1;
322 debug_log("Reached %s\n", __func__);
324 if (floppy->failed_pc == pc)
325 floppy->failed_pc = NULL;
327 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
328 (pc->rq && blk_pc_request(pc->rq)))
329 uptodate = 1; /* FIXME */
330 else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
331 u8 *buf = floppy->pc->buf;
334 floppy->sense_key = buf[2] & 0x0F;
335 floppy->asc = buf[12];
336 floppy->ascq = buf[13];
337 floppy->progress_indication = buf[15] & 0x80 ?
338 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
340 if (floppy->failed_pc)
341 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
343 debug_log("sense key = %x, asc = %x, ascq = %x\n",
344 floppy->sense_key, floppy->asc, floppy->ascq);
346 printk(KERN_ERR "Error in REQUEST SENSE itself - "
347 "Aborting request!\n");
350 idefloppy_end_request(drive, uptodate, 0);
353 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
355 memset(pc, 0, sizeof(*pc));
356 pc->buf = pc->pc_buf;
357 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
360 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
362 idefloppy_init_pc(pc);
363 pc->c[0] = GPCMD_REQUEST_SENSE;
369 * Called when an error was detected during the last packet command. We queue a
370 * request sense packet command in the head of the request list.
372 static void idefloppy_retry_pc(ide_drive_t *drive)
374 struct ide_atapi_pc *pc;
377 (void)ide_read_error(drive);
378 pc = idefloppy_next_pc_storage(drive);
379 rq = idefloppy_next_rq_storage(drive);
380 idefloppy_create_request_sense_cmd(pc);
381 idefloppy_queue_pc_head(drive, pc, rq);
384 /* The usual interrupt handler called during a packet command. */
385 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
387 idefloppy_floppy_t *floppy = drive->driver_data;
389 return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
390 IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
391 idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
395 * What we have here is a classic case of a top half / bottom half interrupt
396 * service routine. In interrupt mode, the device sends an interrupt to signal
397 * that it is ready to receive a packet. However, we need to delay about 2-3
398 * ticks before issuing the packet or we gets in trouble.
400 static int idefloppy_transfer_pc(ide_drive_t *drive)
402 idefloppy_floppy_t *floppy = drive->driver_data;
404 /* Send the actual packet */
405 drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
407 /* Timeout for the packet command */
408 return IDEFLOPPY_WAIT_CMD;
413 * Called as an interrupt (or directly). When the device says it's ready for a
414 * packet, we schedule the packet transfer to occur about 2-3 ticks later in
417 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
419 idefloppy_floppy_t *floppy = drive->driver_data;
420 struct ide_atapi_pc *pc = floppy->pc;
421 ide_expiry_t *expiry;
422 unsigned int timeout;
425 * The following delay solves a problem with ATAPI Zip 100 drives
426 * where the Busy flag was apparently being deasserted before the
427 * unit was ready to receive data. This was happening on a
428 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
429 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
430 * used until after the packet is moved in about 50 msec.
432 if (pc->flags & PC_FLAG_ZIP_DRIVE) {
433 timeout = floppy->ticks;
434 expiry = &idefloppy_transfer_pc;
436 timeout = IDEFLOPPY_WAIT_CMD;
440 return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
443 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
444 struct ide_atapi_pc *pc)
446 /* supress error messages resulting from Medium not present */
447 if (floppy->sense_key == 0x02 &&
448 floppy->asc == 0x3a &&
449 floppy->ascq == 0x00)
452 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
453 "asc = %2x, ascq = %2x\n",
454 floppy->drive->name, pc->c[0], floppy->sense_key,
455 floppy->asc, floppy->ascq);
459 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
460 struct ide_atapi_pc *pc)
462 idefloppy_floppy_t *floppy = drive->driver_data;
464 if (floppy->failed_pc == NULL &&
465 pc->c[0] != GPCMD_REQUEST_SENSE)
466 floppy->failed_pc = pc;
467 /* Set the current packet command */
470 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
471 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
472 ide_floppy_report_error(floppy, pc);
474 pc->error = IDEFLOPPY_ERROR_GENERAL;
476 floppy->failed_pc = NULL;
477 drive->pc_callback(drive);
481 debug_log("Retry number - %d\n", pc->retries);
485 return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
486 IDEFLOPPY_WAIT_CMD, NULL);
489 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
491 debug_log("creating prevent removal command, prevent = %d\n", prevent);
493 idefloppy_init_pc(pc);
494 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
498 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
500 idefloppy_init_pc(pc);
501 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
507 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
510 idefloppy_init_pc(pc);
511 pc->c[0] = GPCMD_FORMAT_UNIT;
514 memset(pc->buf, 0, 12);
516 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
518 if (flags & 1) /* Verify bit on... */
519 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */
522 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
523 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
525 pc->flags |= PC_FLAG_WRITING;
528 /* A mode sense command is used to "sense" floppy parameters. */
529 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
530 u8 page_code, u8 type)
532 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
534 idefloppy_init_pc(pc);
535 pc->c[0] = GPCMD_MODE_SENSE_10;
537 pc->c[2] = page_code + (type << 6);
540 case IDEFLOPPY_CAPABILITIES_PAGE:
543 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
547 printk(KERN_ERR "ide-floppy: unsupported page code "
548 "in create_mode_sense_cmd\n");
550 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
551 pc->req_xfer = length;
554 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
556 idefloppy_init_pc(pc);
557 pc->c[0] = GPCMD_START_STOP_UNIT;
561 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
562 struct ide_atapi_pc *pc, struct request *rq,
563 unsigned long sector)
565 int block = sector / floppy->bs_factor;
566 int blocks = rq->nr_sectors / floppy->bs_factor;
567 int cmd = rq_data_dir(rq);
569 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
572 idefloppy_init_pc(pc);
573 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
574 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
575 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
577 memcpy(rq->cmd, pc->c, 12);
580 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
581 if (rq->cmd_flags & REQ_RW)
582 pc->flags |= PC_FLAG_WRITING;
584 pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
585 pc->flags |= PC_FLAG_DMA_OK;
588 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
589 struct ide_atapi_pc *pc, struct request *rq)
591 idefloppy_init_pc(pc);
592 memcpy(pc->c, rq->cmd, sizeof(pc->c));
594 pc->b_count = rq->data_len;
595 if (rq->data_len && rq_data_dir(rq) == WRITE)
596 pc->flags |= PC_FLAG_WRITING;
599 pc->flags |= PC_FLAG_DMA_OK;
601 * possibly problematic, doesn't look like ide-floppy correctly
602 * handled scattered requests if dma fails...
604 pc->req_xfer = pc->buf_size = rq->data_len;
607 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
608 struct request *rq, sector_t block_s)
610 idefloppy_floppy_t *floppy = drive->driver_data;
611 struct ide_atapi_pc *pc;
612 unsigned long block = (unsigned long)block_s;
614 debug_log("dev: %s, cmd_type: %x, errors: %d\n",
615 rq->rq_disk ? rq->rq_disk->disk_name : "?",
616 rq->cmd_type, rq->errors);
617 debug_log("sector: %ld, nr_sectors: %ld, "
618 "current_nr_sectors: %d\n", (long)rq->sector,
619 rq->nr_sectors, rq->current_nr_sectors);
621 if (rq->errors >= ERROR_MAX) {
622 if (floppy->failed_pc)
623 ide_floppy_report_error(floppy, floppy->failed_pc);
625 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
627 idefloppy_end_request(drive, 0, 0);
630 if (blk_fs_request(rq)) {
631 if (((long)rq->sector % floppy->bs_factor) ||
632 (rq->nr_sectors % floppy->bs_factor)) {
633 printk(KERN_ERR "%s: unsupported r/w request size\n",
635 idefloppy_end_request(drive, 0, 0);
638 pc = idefloppy_next_pc_storage(drive);
639 idefloppy_create_rw_cmd(floppy, pc, rq, block);
640 } else if (blk_special_request(rq)) {
641 pc = (struct ide_atapi_pc *) rq->buffer;
642 } else if (blk_pc_request(rq)) {
643 pc = idefloppy_next_pc_storage(drive);
644 idefloppy_blockpc_cmd(floppy, pc, rq);
646 blk_dump_rq_flags(rq,
647 "ide-floppy: unsupported command in queue");
648 idefloppy_end_request(drive, 0, 0);
652 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
653 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
655 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
656 pc->flags |= PC_FLAG_ZIP_DRIVE;
660 return idefloppy_issue_pc(drive, pc);
664 * Add a special packet command request to the tail of the request queue,
665 * and wait for it to be serviced.
667 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
669 struct ide_floppy_obj *floppy = drive->driver_data;
673 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
674 rq->buffer = (char *) pc;
675 rq->cmd_type = REQ_TYPE_SPECIAL;
676 memcpy(rq->cmd, pc->c, 12);
677 error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
684 * Look at the flexible disk page parameters. We ignore the CHS capacity
685 * parameters and use the LBA parameters instead.
687 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
689 idefloppy_floppy_t *floppy = drive->driver_data;
690 struct ide_atapi_pc pc;
692 int capacity, lba_capacity;
693 u16 transfer_rate, sector_size, cyls, rpm;
696 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
699 if (idefloppy_queue_pc_tail(drive, &pc)) {
700 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
704 floppy->wp = !!(pc.buf[3] & 0x80);
705 set_disk_ro(floppy->disk, floppy->wp);
708 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
709 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
710 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
711 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
712 heads = pc.buf[8 + 4];
713 sectors = pc.buf[8 + 5];
715 capacity = cyls * heads * sectors * sector_size;
717 if (memcmp(page, &floppy->flexible_disk_page, 32))
718 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
719 "%d sector size, %d rpm\n",
720 drive->name, capacity / 1024, cyls, heads,
721 sectors, transfer_rate / 8, sector_size, rpm);
723 memcpy(&floppy->flexible_disk_page, page, 32);
724 drive->bios_cyl = cyls;
725 drive->bios_head = heads;
726 drive->bios_sect = sectors;
727 lba_capacity = floppy->blocks * floppy->block_size;
729 if (capacity < lba_capacity) {
730 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
731 "bytes, but the drive only handles %d\n",
732 drive->name, lba_capacity, capacity);
733 floppy->blocks = floppy->block_size ?
734 capacity / floppy->block_size : 0;
739 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
741 idefloppy_floppy_t *floppy = drive->driver_data;
742 struct ide_atapi_pc pc;
745 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
748 pc.flags |= PC_FLAG_SUPPRESS_ERROR;
749 if (idefloppy_queue_pc_tail(drive, &pc))
752 floppy->srfp = pc.buf[8 + 2] & 0x40;
757 * Determine if a media is present in the floppy drive, and if so, its LBA
760 static int ide_floppy_get_capacity(ide_drive_t *drive)
762 idefloppy_floppy_t *floppy = drive->driver_data;
763 struct ide_atapi_pc pc;
765 u8 header_len, desc_cnt;
766 int i, rc = 1, blocks, length;
769 drive->bios_head = drive->bios_sect = 0;
771 floppy->bs_factor = 1;
772 set_capacity(floppy->disk, 0);
774 idefloppy_create_read_capacity_cmd(&pc);
775 if (idefloppy_queue_pc_tail(drive, &pc)) {
776 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
779 header_len = pc.buf[3];
780 cap_desc = &pc.buf[4];
781 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
783 for (i = 0; i < desc_cnt; i++) {
784 unsigned int desc_start = 4 + i*8;
786 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
787 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
789 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
790 i, blocks * length / 1024, blocks, length);
795 * the code below is valid only for the 1st descriptor, ie i=0
798 switch (pc.buf[desc_start + 4] & 0x03) {
799 /* Clik! drive returns this instead of CAPACITY_CURRENT */
800 case CAPACITY_UNFORMATTED:
801 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
803 * If it is not a clik drive, break out
804 * (maintains previous driver behaviour)
807 case CAPACITY_CURRENT:
808 /* Normal Zip/LS-120 disks */
809 if (memcmp(cap_desc, &floppy->cap_desc, 8))
810 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
811 "sector size\n", drive->name,
812 blocks * length / 1024, blocks, length);
813 memcpy(&floppy->cap_desc, cap_desc, 8);
815 if (!length || length % 512) {
816 printk(KERN_NOTICE "%s: %d bytes block size "
817 "not supported\n", drive->name, length);
819 floppy->blocks = blocks;
820 floppy->block_size = length;
821 floppy->bs_factor = length / 512;
822 if (floppy->bs_factor != 1)
823 printk(KERN_NOTICE "%s: warning: non "
824 "512 bytes block size not "
830 case CAPACITY_NO_CARTRIDGE:
832 * This is a KERN_ERR so it appears on screen
833 * for the user to see
835 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
837 case CAPACITY_INVALID:
838 printk(KERN_ERR "%s: Invalid capacity for disk "
839 "in drive\n", drive->name);
842 debug_log("Descriptor 0 Code: %d\n",
843 pc.buf[desc_start + 4] & 0x03);
846 /* Clik! disk does not support get_flexible_disk_page */
847 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
848 (void) ide_floppy_get_flexible_disk_page(drive);
850 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
855 * Obtain the list of formattable capacities.
856 * Very similar to ide_floppy_get_capacity, except that we push the capacity
857 * descriptors to userland, instead of our own structures.
859 * Userland gives us the following structure:
861 * struct idefloppy_format_capacities {
869 * userland initializes nformats to the number of allocated formats[] records.
870 * On exit we set nformats to the number of records we've actually initialized.
873 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
875 struct ide_atapi_pc pc;
876 u8 header_len, desc_cnt;
877 int i, blocks, length, u_array_size, u_index;
880 if (get_user(u_array_size, arg))
883 if (u_array_size <= 0)
886 idefloppy_create_read_capacity_cmd(&pc);
887 if (idefloppy_queue_pc_tail(drive, &pc)) {
888 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
891 header_len = pc.buf[3];
892 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
898 * We always skip the first capacity descriptor. That's the current
899 * capacity. We are interested in the remaining descriptors, the
900 * formattable capacities.
902 for (i = 1; i < desc_cnt; i++) {
903 unsigned int desc_start = 4 + i*8;
905 if (u_index >= u_array_size)
906 break; /* User-supplied buffer too small */
908 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
909 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
911 if (put_user(blocks, argp))
915 if (put_user(length, argp))
922 if (put_user(u_index, arg))
928 * Get ATAPI_FORMAT_UNIT progress indication.
930 * Userland gives a pointer to an int. The int is set to a progress
931 * indicator 0-65536, with 65536=100%.
933 * If the drive does not support format progress indication, we just check
934 * the dsc bit, and return either 0 or 65536.
937 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
939 idefloppy_floppy_t *floppy = drive->driver_data;
940 struct ide_atapi_pc pc;
941 int progress_indication = 0x10000;
944 idefloppy_create_request_sense_cmd(&pc);
945 if (idefloppy_queue_pc_tail(drive, &pc))
948 if (floppy->sense_key == 2 &&
951 progress_indication = floppy->progress_indication;
953 /* Else assume format_unit has finished, and we're at 0x10000 */
955 ide_hwif_t *hwif = drive->hwif;
959 local_irq_save(flags);
960 stat = hwif->tp_ops->read_status(hwif);
961 local_irq_restore(flags);
963 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
965 if (put_user(progress_indication, arg))
971 static sector_t idefloppy_capacity(ide_drive_t *drive)
973 idefloppy_floppy_t *floppy = drive->driver_data;
974 unsigned long capacity = floppy->blocks * floppy->bs_factor;
980 * Check whether we can support a drive, based on the ATAPI IDENTIFY command
983 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
986 u8 device_type, protocol, removable, drq_type, packet_size;
988 *((u16 *) &gcw) = id->config;
990 device_type = gcw[1] & 0x1F;
991 removable = (gcw[0] & 0x80) >> 7;
992 protocol = (gcw[1] & 0xC0) >> 6;
993 drq_type = (gcw[0] & 0x60) >> 5;
994 packet_size = gcw[0] & 0x03;
997 /* kludge for Apple PowerBook internal zip */
998 if (device_type == 5 &&
999 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1004 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1006 else if (device_type != 0)
1007 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1008 "to floppy\n", device_type);
1009 else if (!removable)
1010 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1011 else if (drq_type == 3)
1012 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1013 "supported\n", drq_type);
1014 else if (packet_size != 0)
1015 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1016 "bytes\n", packet_size);
1022 #ifdef CONFIG_IDE_PROC_FS
1023 static void idefloppy_add_settings(ide_drive_t *drive)
1025 idefloppy_floppy_t *floppy = drive->driver_data;
1027 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1028 &drive->bios_cyl, NULL);
1029 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1030 &drive->bios_head, NULL);
1031 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1,
1032 &drive->bios_sect, NULL);
1033 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1034 &floppy->ticks, NULL);
1037 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1040 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1044 *((u16 *) &gcw) = drive->id->config;
1045 floppy->pc = floppy->pc_stack;
1046 drive->pc_callback = ide_floppy_callback;
1048 if (((gcw[0] & 0x60) >> 5) == 1)
1049 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1051 * We used to check revisions here. At this point however I'm giving up.
1052 * Just assume they are all broken, its easier.
1054 * The actual reason for the workarounds was likely a driver bug after
1055 * all rather than a firmware bug, and the workaround below used to hide
1056 * it. It should be fixed as of version 1.9, but to be on the safe side
1057 * we'll leave the limitation below for the 2.2.x tree.
1059 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1060 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1061 /* This value will be visible in the /proc/ide/hdx/settings */
1062 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1063 blk_queue_max_sectors(drive->queue, 64);
1067 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1068 * nasty clicking noises without it, so please don't remove this.
1070 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1071 blk_queue_max_sectors(drive->queue, 64);
1072 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1075 (void) ide_floppy_get_capacity(drive);
1076 idefloppy_add_settings(drive);
1079 static void ide_floppy_remove(ide_drive_t *drive)
1081 idefloppy_floppy_t *floppy = drive->driver_data;
1082 struct gendisk *g = floppy->disk;
1084 ide_proc_unregister_driver(drive, floppy->driver);
1088 ide_floppy_put(floppy);
1091 static void idefloppy_cleanup_obj(struct kref *kref)
1093 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1094 ide_drive_t *drive = floppy->drive;
1095 struct gendisk *g = floppy->disk;
1097 drive->driver_data = NULL;
1098 g->private_data = NULL;
1103 #ifdef CONFIG_IDE_PROC_FS
1104 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1105 int count, int *eof, void *data)
1107 ide_drive_t*drive = (ide_drive_t *)data;
1110 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1111 PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1114 static ide_proc_entry_t idefloppy_proc[] = {
1115 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1116 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1117 { NULL, 0, NULL, NULL }
1119 #endif /* CONFIG_IDE_PROC_FS */
1121 static int ide_floppy_probe(ide_drive_t *);
1123 static ide_driver_t idefloppy_driver = {
1125 .owner = THIS_MODULE,
1126 .name = "ide-floppy",
1127 .bus = &ide_bus_type,
1129 .probe = ide_floppy_probe,
1130 .remove = ide_floppy_remove,
1131 .version = IDEFLOPPY_VERSION,
1132 .media = ide_floppy,
1133 .supports_dsc_overlap = 0,
1134 .do_request = idefloppy_do_request,
1135 .end_request = idefloppy_end_request,
1136 .error = __ide_error,
1137 #ifdef CONFIG_IDE_PROC_FS
1138 .proc = idefloppy_proc,
1142 static int idefloppy_open(struct inode *inode, struct file *filp)
1144 struct gendisk *disk = inode->i_bdev->bd_disk;
1145 struct ide_floppy_obj *floppy;
1147 struct ide_atapi_pc pc;
1150 debug_log("Reached %s\n", __func__);
1152 floppy = ide_floppy_get(disk);
1156 drive = floppy->drive;
1160 if (floppy->openers == 1) {
1161 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1164 idefloppy_init_pc(&pc);
1165 pc.c[0] = GPCMD_TEST_UNIT_READY;
1167 if (idefloppy_queue_pc_tail(drive, &pc)) {
1168 idefloppy_create_start_stop_cmd(&pc, 1);
1169 (void) idefloppy_queue_pc_tail(drive, &pc);
1172 if (ide_floppy_get_capacity(drive)
1173 && (filp->f_flags & O_NDELAY) == 0
1175 * Allow O_NDELAY to open a drive without a disk, or with an
1176 * unreadable disk, so that we can get the format capacity
1177 * of the drive or begin the format - Sam
1181 goto out_put_floppy;
1184 if (floppy->wp && (filp->f_mode & 2)) {
1186 goto out_put_floppy;
1188 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1189 /* IOMEGA Clik! drives do not support lock/unlock commands */
1190 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1191 idefloppy_create_prevent_cmd(&pc, 1);
1192 (void) idefloppy_queue_pc_tail(drive, &pc);
1194 check_disk_change(inode->i_bdev);
1195 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1197 goto out_put_floppy;
1203 ide_floppy_put(floppy);
1207 static int idefloppy_release(struct inode *inode, struct file *filp)
1209 struct gendisk *disk = inode->i_bdev->bd_disk;
1210 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1211 ide_drive_t *drive = floppy->drive;
1212 struct ide_atapi_pc pc;
1214 debug_log("Reached %s\n", __func__);
1216 if (floppy->openers == 1) {
1217 /* IOMEGA Clik! drives do not support lock/unlock commands */
1218 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1219 idefloppy_create_prevent_cmd(&pc, 0);
1220 (void) idefloppy_queue_pc_tail(drive, &pc);
1223 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1228 ide_floppy_put(floppy);
1233 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1235 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1236 ide_drive_t *drive = floppy->drive;
1238 geo->heads = drive->bios_head;
1239 geo->sectors = drive->bios_sect;
1240 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1244 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1245 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1247 if (floppy->openers > 1)
1250 /* The IOMEGA Clik! Drive doesn't support this command -
1251 * no room for an eject mechanism */
1252 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1253 int prevent = arg ? 1 : 0;
1255 if (cmd == CDROMEJECT)
1258 idefloppy_create_prevent_cmd(pc, prevent);
1259 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1262 if (cmd == CDROMEJECT) {
1263 idefloppy_create_start_stop_cmd(pc, 2);
1264 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1270 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1273 int blocks, length, flags, err = 0;
1274 struct ide_atapi_pc pc;
1276 if (floppy->openers > 1) {
1277 /* Don't format if someone is using the disk */
1278 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1282 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1285 * Send ATAPI_FORMAT_UNIT to the drive.
1287 * Userland gives us the following structure:
1289 * struct idefloppy_format_command {
1295 * flags is a bitmask, currently, the only defined flag is:
1297 * 0x01 - verify media after format.
1299 if (get_user(blocks, arg) ||
1300 get_user(length, arg+1) ||
1301 get_user(flags, arg+2)) {
1306 (void) idefloppy_get_sfrp_bit(floppy->drive);
1307 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1309 if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1314 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1319 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1320 unsigned int cmd, unsigned long arg)
1322 struct block_device *bdev = inode->i_bdev;
1323 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1324 ide_drive_t *drive = floppy->drive;
1325 struct ide_atapi_pc pc;
1326 void __user *argp = (void __user *)arg;
1332 case CDROM_LOCKDOOR:
1333 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1334 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1336 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1337 return ide_floppy_get_format_capacities(drive, argp);
1338 case IDEFLOPPY_IOCTL_FORMAT_START:
1339 if (!(file->f_mode & 2))
1342 return ide_floppy_format_unit(floppy, (int __user *)arg);
1343 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1344 return idefloppy_get_format_progress(drive, argp);
1348 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1349 * and CDROM_SEND_PACKET (legacy) ioctls
1351 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1352 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1353 bdev->bd_disk, cmd, argp);
1358 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1363 static int idefloppy_media_changed(struct gendisk *disk)
1365 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1366 ide_drive_t *drive = floppy->drive;
1369 /* do not scan partitions twice if this is a removable device */
1370 if (drive->attach) {
1374 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1375 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1379 static int idefloppy_revalidate_disk(struct gendisk *disk)
1381 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1382 set_capacity(disk, idefloppy_capacity(floppy->drive));
1386 static struct block_device_operations idefloppy_ops = {
1387 .owner = THIS_MODULE,
1388 .open = idefloppy_open,
1389 .release = idefloppy_release,
1390 .ioctl = idefloppy_ioctl,
1391 .getgeo = idefloppy_getgeo,
1392 .media_changed = idefloppy_media_changed,
1393 .revalidate_disk = idefloppy_revalidate_disk
1396 static int ide_floppy_probe(ide_drive_t *drive)
1398 idefloppy_floppy_t *floppy;
1401 if (!strstr("ide-floppy", drive->driver_req))
1403 if (!drive->present)
1405 if (drive->media != ide_floppy)
1407 if (!idefloppy_identify_device(drive, drive->id)) {
1408 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1409 " of ide-floppy\n", drive->name);
1412 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1414 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1415 " structure\n", drive->name);
1419 g = alloc_disk(1 << PARTN_BITS);
1421 goto out_free_floppy;
1423 ide_init_disk(g, drive);
1425 ide_proc_register_driver(drive, &idefloppy_driver);
1427 kref_init(&floppy->kref);
1429 floppy->drive = drive;
1430 floppy->driver = &idefloppy_driver;
1433 g->private_data = &floppy->driver;
1435 drive->driver_data = floppy;
1437 idefloppy_setup(drive, floppy);
1439 g->minors = 1 << PARTN_BITS;
1440 g->driverfs_dev = &drive->gendev;
1441 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1442 g->fops = &idefloppy_ops;
1453 static void __exit idefloppy_exit(void)
1455 driver_unregister(&idefloppy_driver.gen_driver);
1458 static int __init idefloppy_init(void)
1460 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1461 return driver_register(&idefloppy_driver.gen_driver);
1464 MODULE_ALIAS("ide:*m-floppy*");
1465 module_init(idefloppy_init);
1466 module_exit(idefloppy_exit);
1467 MODULE_LICENSE("GPL");
1468 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");