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
10 * The driver currently doesn't have any fancy features, just the bare
11 * minimum read/write support.
13 * This driver supports the following IDE floppy drives:
15 * LS-120/240 SuperDisk
17 * Iomega PC Card Clik!/PocketZip
19 * For a historical changelog see
20 * Documentation/ide/ChangeLog.ide-floppy.1996-2002
23 #define IDEFLOPPY_VERSION "0.99.newide"
25 #include <linux/module.h>
26 #include <linux/types.h>
27 #include <linux/string.h>
28 #include <linux/kernel.h>
29 #include <linux/delay.h>
30 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/major.h>
34 #include <linux/errno.h>
35 #include <linux/genhd.h>
36 #include <linux/slab.h>
37 #include <linux/cdrom.h>
38 #include <linux/ide.h>
39 #include <linux/bitops.h>
40 #include <linux/mutex.h>
42 #include <scsi/scsi_ioctl.h>
44 #include <asm/byteorder.h>
45 #include <linux/irq.h>
46 #include <linux/uaccess.h>
48 #include <asm/unaligned.h>
50 /* define to see debug info */
51 #define IDEFLOPPY_DEBUG_LOG 0
53 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
54 #define IDEFLOPPY_DEBUG( fmt, args... )
56 #if IDEFLOPPY_DEBUG_LOG
57 #define debug_log(fmt, args...) \
58 printk(KERN_INFO "ide-floppy: " fmt, ## args)
60 #define debug_log(fmt, args... ) do {} while(0)
65 * Some drives require a longer irq timeout.
67 #define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD)
70 * After each failed packet command we issue a request sense command
71 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times.
73 #define IDEFLOPPY_MAX_PC_RETRIES 3
76 * With each packet command, we allocate a buffer of
77 * IDEFLOPPY_PC_BUFFER_SIZE bytes.
79 #define IDEFLOPPY_PC_BUFFER_SIZE 256
82 * In various places in the driver, we need to allocate storage
83 * for packet commands and requests, which will remain valid while
84 * we leave the driver to wait for an interrupt or a timeout event.
86 #define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES)
89 * Our view of a packet command.
91 typedef struct idefloppy_packet_command_s {
92 u8 c[12]; /* Actual packet bytes */
93 int retries; /* On each retry, we increment retries */
94 int error; /* Error code */
95 int request_transfer; /* Bytes to transfer */
96 int actually_transferred; /* Bytes actually transferred */
97 int buffer_size; /* Size of our data buffer */
98 int b_count; /* Missing/Available data on the current buffer */
99 struct request *rq; /* The corresponding request */
100 u8 *buffer; /* Data buffer */
101 u8 *current_position; /* Pointer into the above buffer */
102 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */
103 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */
104 unsigned long flags; /* Status/Action bit flags: long for set_bit */
108 * Packet command flag bits.
110 #define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */
111 #define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */
112 #define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */
113 #define PC_WRITING 5 /* Data direction */
115 #define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */
117 /* format capacities descriptor codes */
118 #define CAPACITY_INVALID 0x00
119 #define CAPACITY_UNFORMATTED 0x01
120 #define CAPACITY_CURRENT 0x02
121 #define CAPACITY_NO_CARTRIDGE 0x03
124 * Most of our global data which we need to save even as we leave the
125 * driver due to an interrupt or a timer event is stored in a variable
126 * of type idefloppy_floppy_t, defined below.
128 typedef struct ide_floppy_obj {
130 ide_driver_t *driver;
131 struct gendisk *disk;
133 unsigned int openers; /* protected by BKL for now */
135 /* Current packet command */
137 /* Last failed packet command */
138 idefloppy_pc_t *failed_pc;
139 /* Packet command stack */
140 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK];
141 /* Next free packet command storage space */
143 struct request rq_stack[IDEFLOPPY_PC_STACK];
144 /* We implement a circular array */
148 * Last error information
150 u8 sense_key, asc, ascq;
151 /* delay this long before sending packet command */
153 int progress_indication;
159 int blocks, block_size, bs_factor;
160 /* Last format capacity descriptor */
162 /* Copy of the flexible disk page */
163 u8 flexible_disk_page[32];
166 /* Supports format progress report */
168 /* Status/Action flags */
170 } idefloppy_floppy_t;
172 #define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */
175 * Floppy flag bits values.
177 #define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */
178 #define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */
179 #define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */
180 #define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */
181 #define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */
184 * Defines for the mode sense command
186 #define MODE_SENSE_CURRENT 0x00
187 #define MODE_SENSE_CHANGEABLE 0x01
188 #define MODE_SENSE_DEFAULT 0x02
189 #define MODE_SENSE_SAVED 0x03
192 * IOCTLs used in low-level formatting.
195 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600
196 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601
197 #define IDEFLOPPY_IOCTL_FORMAT_START 0x4602
198 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603
201 * Error codes which are returned in rq->errors to the higher part
204 #define IDEFLOPPY_ERROR_GENERAL 101
207 * The following is used to format the general configuration word of
208 * the ATAPI IDENTIFY DEVICE command.
210 struct idefloppy_id_gcw {
211 #if defined(__LITTLE_ENDIAN_BITFIELD)
212 unsigned packet_size :2; /* Packet Size */
213 unsigned reserved234 :3; /* Reserved */
214 unsigned drq_type :2; /* Command packet DRQ type */
215 unsigned removable :1; /* Removable media */
216 unsigned device_type :5; /* Device type */
217 unsigned reserved13 :1; /* Reserved */
218 unsigned protocol :2; /* Protocol type */
219 #elif defined(__BIG_ENDIAN_BITFIELD)
220 unsigned protocol :2; /* Protocol type */
221 unsigned reserved13 :1; /* Reserved */
222 unsigned device_type :5; /* Device type */
223 unsigned removable :1; /* Removable media */
224 unsigned drq_type :2; /* Command packet DRQ type */
225 unsigned reserved234 :3; /* Reserved */
226 unsigned packet_size :2; /* Packet Size */
228 #error "Bitfield endianness not defined! Check your byteorder.h"
233 * Pages of the SELECT SENSE / MODE SENSE packet commands.
234 * See SFF-8070i spec.
236 #define IDEFLOPPY_CAPABILITIES_PAGE 0x1b
237 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05
239 static DEFINE_MUTEX(idefloppy_ref_mutex);
241 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
243 #define ide_floppy_g(disk) \
244 container_of((disk)->private_data, struct ide_floppy_obj, driver)
246 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
248 struct ide_floppy_obj *floppy = NULL;
250 mutex_lock(&idefloppy_ref_mutex);
251 floppy = ide_floppy_g(disk);
253 kref_get(&floppy->kref);
254 mutex_unlock(&idefloppy_ref_mutex);
258 static void idefloppy_cleanup_obj(struct kref *);
260 static void ide_floppy_put(struct ide_floppy_obj *floppy)
262 mutex_lock(&idefloppy_ref_mutex);
263 kref_put(&floppy->kref, idefloppy_cleanup_obj);
264 mutex_unlock(&idefloppy_ref_mutex);
268 * Too bad. The drive wants to send us data which we are not ready to accept.
269 * Just throw it away.
271 static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount)
274 (void) HWIF(drive)->INB(IDE_DATA_REG);
277 static void idefloppy_write_zeros(ide_drive_t *drive, unsigned int bcount)
280 HWIF(drive)->OUTB(0, IDE_DATA_REG);
285 * idefloppy_do_end_request is used to finish servicing a request.
287 * For read/write requests, we will call ide_end_request to pass to the
290 static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs)
292 idefloppy_floppy_t *floppy = drive->driver_data;
293 struct request *rq = HWGROUP(drive)->rq;
296 debug_log("Reached %s\n", __func__);
299 case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
300 case 1: error = 0; break;
301 default: error = uptodate;
304 floppy->failed_pc = NULL;
305 /* Why does this happen? */
308 if (!blk_special_request(rq)) {
309 /* our real local end request function */
310 ide_end_request(drive, uptodate, nsecs);
314 /* fixme: need to move this local also */
315 ide_end_drive_cmd(drive, 0, 0);
319 static void ide_floppy_io_buffers(ide_drive_t *drive, idefloppy_pc_t *pc,
320 unsigned int bcount, int direction)
322 struct request *rq = pc->rq;
323 struct req_iterator iter;
324 struct bio_vec *bvec;
329 rq_for_each_segment(bvec, rq, iter) {
333 count = min(bvec->bv_len, bcount);
335 data = bvec_kmap_irq(bvec, &flags);
337 drive->hwif->atapi_output_bytes(drive, data, count);
339 drive->hwif->atapi_input_bytes(drive, data, count);
340 bvec_kunmap_irq(data, &flags);
343 pc->b_count += count;
347 idefloppy_do_end_request(drive, 1, done >> 9);
350 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
351 drive->name, __func__, bcount);
353 idefloppy_write_zeros(drive, bcount);
355 idefloppy_discard_data(drive, bcount);
360 static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc)
362 struct request *rq = pc->rq;
363 struct bio *bio = rq->bio;
365 while ((bio = rq->bio) != NULL)
366 idefloppy_do_end_request(drive, 1, 0);
370 * idefloppy_queue_pc_head generates a new packet command request in front
371 * of the request queue, before the current request, so that it will be
372 * processed immediately, on the next pass through the driver.
374 static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq)
376 struct ide_floppy_obj *floppy = drive->driver_data;
378 ide_init_drive_cmd(rq);
379 rq->buffer = (char *) pc;
380 rq->cmd_type = REQ_TYPE_SPECIAL;
381 rq->rq_disk = floppy->disk;
382 (void) ide_do_drive_cmd(drive, rq, ide_preempt);
385 static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive)
387 idefloppy_floppy_t *floppy = drive->driver_data;
389 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
390 floppy->pc_stack_index=0;
391 return (&floppy->pc_stack[floppy->pc_stack_index++]);
394 static struct request *idefloppy_next_rq_storage (ide_drive_t *drive)
396 idefloppy_floppy_t *floppy = drive->driver_data;
398 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
399 floppy->rq_stack_index = 0;
400 return (&floppy->rq_stack[floppy->rq_stack_index++]);
403 static void idefloppy_request_sense_callback(ide_drive_t *drive)
405 idefloppy_floppy_t *floppy = drive->driver_data;
406 u8 *buf = floppy->pc->buffer;
408 debug_log("Reached %s\n", __func__);
410 if (!floppy->pc->error) {
411 floppy->sense_key = buf[2] & 0x0F;
412 floppy->asc = buf[12];
413 floppy->ascq = buf[13];
414 floppy->progress_indication = buf[15] & 0x80 ?
415 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
417 if (floppy->failed_pc)
418 debug_log("pc = %x, sense key = %x, asc = %x,"
420 floppy->failed_pc->c[0],
425 debug_log("sense key = %x, asc = %x, ascq = %x\n",
431 idefloppy_do_end_request(drive, 1, 0);
433 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
435 idefloppy_do_end_request(drive, 0, 0);
440 * General packet command callback function.
442 static void idefloppy_pc_callback (ide_drive_t *drive)
444 idefloppy_floppy_t *floppy = drive->driver_data;
446 debug_log("Reached %s\n", __func__);
448 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0);
452 * idefloppy_init_pc initializes a packet command.
454 static void idefloppy_init_pc (idefloppy_pc_t *pc)
456 memset(pc->c, 0, 12);
459 pc->request_transfer = 0;
460 pc->buffer = pc->pc_buffer;
461 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE;
462 pc->callback = &idefloppy_pc_callback;
465 static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc)
467 idefloppy_init_pc(pc);
468 pc->c[0] = GPCMD_REQUEST_SENSE;
470 pc->request_transfer = 18;
471 pc->callback = &idefloppy_request_sense_callback;
475 * idefloppy_retry_pc is called when an error was detected during the
476 * last packet command. We queue a request sense packet command in
477 * the head of the request list.
479 static void idefloppy_retry_pc (ide_drive_t *drive)
484 (void)drive->hwif->INB(IDE_ERROR_REG);
485 pc = idefloppy_next_pc_storage(drive);
486 rq = idefloppy_next_rq_storage(drive);
487 idefloppy_create_request_sense_cmd(pc);
488 idefloppy_queue_pc_head(drive, pc, rq);
491 /* The usual interrupt handler called during a packet command. */
492 static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive)
494 idefloppy_floppy_t *floppy = drive->driver_data;
495 ide_hwif_t *hwif = drive->hwif;
496 idefloppy_pc_t *pc = floppy->pc;
497 struct request *rq = pc->rq;
498 xfer_func_t *xferfunc;
504 debug_log("Reached %s interrupt handler\n", __func__);
506 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
507 dma_error = hwif->ide_dma_end(drive);
509 printk(KERN_ERR "%s: DMA %s error\n", drive->name,
510 rq_data_dir(rq) ? "write" : "read");
511 set_bit(PC_DMA_ERROR, &pc->flags);
513 pc->actually_transferred = pc->request_transfer;
514 idefloppy_update_buffers(drive, pc);
516 debug_log("DMA finished\n");
519 /* Clear the interrupt */
520 stat = drive->hwif->INB(IDE_STATUS_REG);
522 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */
523 debug_log("Packet command completed, %d bytes transferred\n",
524 pc->actually_transferred);
525 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags);
527 local_irq_enable_in_hardirq();
529 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) {
531 debug_log("%s: I/O error\n", drive->name);
533 if (pc->c[0] == GPCMD_REQUEST_SENSE) {
534 printk(KERN_ERR "ide-floppy: I/O error in "
535 "request sense command\n");
536 return ide_do_reset(drive);
538 /* Retry operation */
539 idefloppy_retry_pc(drive);
540 /* queued, but not started */
544 if (floppy->failed_pc == pc)
545 floppy->failed_pc = NULL;
546 /* Command finished - Call the callback function */
551 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) {
552 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
553 "more interrupts in DMA mode\n");
555 return ide_do_reset(drive);
558 /* Get the number of bytes to transfer */
559 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) |
560 hwif->INB(IDE_BCOUNTL_REG);
561 /* on this interrupt */
562 ireason = hwif->INB(IDE_IREASON_REG);
565 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
566 return ide_do_reset(drive);
568 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) {
569 /* Hopefully, we will never get here */
570 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
571 (ireason & IO) ? "Write" : "Read");
572 printk(KERN_ERR "but the floppy wants us to %s !\n",
573 (ireason & IO) ? "Read" : "Write");
574 return ide_do_reset(drive);
576 if (!test_bit(PC_WRITING, &pc->flags)) {
577 /* Reading - Check that we have enough space */
578 temp = pc->actually_transferred + bcount;
579 if (temp > pc->request_transfer) {
580 if (temp > pc->buffer_size) {
581 printk(KERN_ERR "ide-floppy: The floppy wants "
582 "to send us more data than expected "
583 "- discarding data\n");
584 idefloppy_discard_data(drive, bcount);
586 ide_set_handler(drive,
592 debug_log("The floppy wants to send us more data than"
593 " expected - allowing transfer\n");
596 if (test_bit(PC_WRITING, &pc->flags))
597 xferfunc = hwif->atapi_output_bytes;
599 xferfunc = hwif->atapi_input_bytes;
602 xferfunc(drive, pc->current_position, bcount);
604 ide_floppy_io_buffers(drive, pc, bcount,
605 test_bit(PC_WRITING, &pc->flags));
607 /* Update the current position */
608 pc->actually_transferred += bcount;
609 pc->current_position += bcount;
611 /* And set the interrupt handler again */
612 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
617 * This is the original routine that did the packet transfer.
618 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
619 * for that drive below. The algorithm is chosen based on drive type
621 static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive)
623 ide_startstop_t startstop;
624 idefloppy_floppy_t *floppy = drive->driver_data;
627 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
628 printk(KERN_ERR "ide-floppy: Strange, packet command "
629 "initiated yet DRQ isn't asserted\n");
632 ireason = drive->hwif->INB(IDE_IREASON_REG);
633 if ((ireason & CD) == 0 || (ireason & IO)) {
634 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
635 "issuing a packet command\n");
636 return ide_do_reset(drive);
639 /* Set the interrupt routine */
640 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
641 /* Send the actual packet */
642 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
648 * What we have here is a classic case of a top half / bottom half
649 * interrupt service routine. In interrupt mode, the device sends
650 * an interrupt to signal it's ready to receive a packet. However,
651 * we need to delay about 2-3 ticks before issuing the packet or we
654 * So, follow carefully. transfer_pc1 is called as an interrupt (or
655 * directly). In either case, when the device says it's ready for a
656 * packet, we schedule the packet transfer to occur about 2-3 ticks
657 * later in transfer_pc2.
659 static int idefloppy_transfer_pc2 (ide_drive_t *drive)
661 idefloppy_floppy_t *floppy = drive->driver_data;
663 /* Send the actual packet */
664 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12);
665 /* Timeout for the packet command */
666 return IDEFLOPPY_WAIT_CMD;
669 static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive)
671 idefloppy_floppy_t *floppy = drive->driver_data;
672 ide_startstop_t startstop;
675 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
676 printk(KERN_ERR "ide-floppy: Strange, packet command "
677 "initiated yet DRQ isn't asserted\n");
680 ireason = drive->hwif->INB(IDE_IREASON_REG);
681 if ((ireason & CD) == 0 || (ireason & IO)) {
682 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
683 "while issuing a packet command\n");
684 return ide_do_reset(drive);
687 * The following delay solves a problem with ATAPI Zip 100 drives
688 * where the Busy flag was apparently being deasserted before the
689 * unit was ready to receive data. This was happening on a
690 * 1200 MHz Athlon system. 10/26/01 25msec is too short,
691 * 40 and 50msec work well. idefloppy_pc_intr will not be actually
692 * used until after the packet is moved in about 50 msec.
695 ide_set_handler(drive,
696 &idefloppy_pc_intr, /* service routine for packet command */
697 floppy->ticks, /* wait this long before "failing" */
698 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */
702 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
705 /* supress error messages resulting from Medium not present */
706 if (floppy->sense_key == 0x02 &&
707 floppy->asc == 0x3a &&
708 floppy->ascq == 0x00)
711 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
712 "asc = %2x, ascq = %2x\n",
713 floppy->drive->name, pc->c[0], floppy->sense_key,
714 floppy->asc, floppy->ascq);
719 * Issue a packet command
721 static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc)
723 idefloppy_floppy_t *floppy = drive->driver_data;
724 ide_hwif_t *hwif = drive->hwif;
725 ide_handler_t *pkt_xfer_routine;
729 if (floppy->failed_pc == NULL &&
730 pc->c[0] != GPCMD_REQUEST_SENSE)
731 floppy->failed_pc = pc;
732 /* Set the current packet command */
735 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
736 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags))
737 ide_floppy_report_error(floppy, pc);
739 pc->error = IDEFLOPPY_ERROR_GENERAL;
741 floppy->failed_pc = NULL;
746 debug_log("Retry number - %d\n", pc->retries);
749 /* We haven't transferred any data yet */
750 pc->actually_transferred = 0;
751 pc->current_position = pc->buffer;
752 bcount = min(pc->request_transfer, 63 * 1024);
754 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags))
759 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma)
760 dma = !hwif->dma_setup(drive);
762 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
763 IDE_TFLAG_OUT_DEVICE, bcount, dma);
765 if (dma) { /* Begin DMA, if necessary */
766 set_bit(PC_DMA_IN_PROGRESS, &pc->flags);
767 hwif->dma_start(drive);
770 /* Can we transfer the packet when we get the interrupt or wait? */
771 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) {
773 pkt_xfer_routine = &idefloppy_transfer_pc1;
776 pkt_xfer_routine = &idefloppy_transfer_pc;
779 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) {
780 /* Issue the packet command */
781 ide_execute_command(drive, WIN_PACKETCMD,
787 /* Issue the packet command */
788 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
789 return (*pkt_xfer_routine) (drive);
793 static void idefloppy_rw_callback (ide_drive_t *drive)
795 debug_log("Reached %s\n", __func__);
797 idefloppy_do_end_request(drive, 1, 0);
801 static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent)
803 debug_log("creating prevent removal command, prevent = %d\n", prevent);
805 idefloppy_init_pc(pc);
806 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
810 static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc)
812 idefloppy_init_pc(pc);
813 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
816 pc->request_transfer = 255;
819 static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l,
822 idefloppy_init_pc(pc);
823 pc->c[0] = GPCMD_FORMAT_UNIT;
826 memset(pc->buffer, 0, 12);
827 pc->buffer[1] = 0xA2;
828 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
830 if (flags & 1) /* Verify bit on... */
831 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */
834 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4]));
835 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8]));
837 set_bit(PC_WRITING, &pc->flags);
841 * A mode sense command is used to "sense" floppy parameters.
843 static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type)
845 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
847 idefloppy_init_pc(pc);
848 pc->c[0] = GPCMD_MODE_SENSE_10;
850 pc->c[2] = page_code + (type << 6);
853 case IDEFLOPPY_CAPABILITIES_PAGE:
856 case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
860 printk(KERN_ERR "ide-floppy: unsupported page code "
861 "in create_mode_sense_cmd\n");
863 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
864 pc->request_transfer = length;
867 static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start)
869 idefloppy_init_pc(pc);
870 pc->c[0] = GPCMD_START_STOP_UNIT;
874 static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc)
876 idefloppy_init_pc(pc);
877 pc->c[0] = GPCMD_TEST_UNIT_READY;
880 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
881 idefloppy_pc_t *pc, struct request *rq,
882 unsigned long sector)
884 int block = sector / floppy->bs_factor;
885 int blocks = rq->nr_sectors / floppy->bs_factor;
886 int cmd = rq_data_dir(rq);
888 debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
891 idefloppy_init_pc(pc);
892 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
893 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
894 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
896 pc->callback = &idefloppy_rw_callback;
898 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
899 if (rq->cmd_flags & REQ_RW)
900 set_bit(PC_WRITING, &pc->flags);
902 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size;
903 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
907 idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq)
909 idefloppy_init_pc(pc);
910 pc->callback = &idefloppy_rw_callback;
911 memcpy(pc->c, rq->cmd, sizeof(pc->c));
913 pc->b_count = rq->data_len;
914 if (rq->data_len && rq_data_dir(rq) == WRITE)
915 set_bit(PC_WRITING, &pc->flags);
916 pc->buffer = rq->data;
918 set_bit(PC_DMA_RECOMMENDED, &pc->flags);
921 * possibly problematic, doesn't look like ide-floppy correctly
922 * handled scattered requests if dma fails...
924 pc->request_transfer = pc->buffer_size = rq->data_len;
928 * idefloppy_do_request is our request handling function.
930 static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s)
932 idefloppy_floppy_t *floppy = drive->driver_data;
934 unsigned long block = (unsigned long)block_s;
936 debug_log("dev: %s, cmd_type: %x, errors: %d\n",
937 rq->rq_disk ? rq->rq_disk->disk_name : "?",
938 rq->cmd_type, rq->errors);
939 debug_log("sector: %ld, nr_sectors: %ld, "
940 "current_nr_sectors: %d\n", (long)rq->sector,
941 rq->nr_sectors, rq->current_nr_sectors);
943 if (rq->errors >= ERROR_MAX) {
944 if (floppy->failed_pc)
945 ide_floppy_report_error(floppy, floppy->failed_pc);
947 printk(KERN_ERR "ide-floppy: %s: I/O error\n",
949 idefloppy_do_end_request(drive, 0, 0);
952 if (blk_fs_request(rq)) {
953 if (((long)rq->sector % floppy->bs_factor) ||
954 (rq->nr_sectors % floppy->bs_factor)) {
955 printk("%s: unsupported r/w request size\n",
957 idefloppy_do_end_request(drive, 0, 0);
960 pc = idefloppy_next_pc_storage(drive);
961 idefloppy_create_rw_cmd(floppy, pc, rq, block);
962 } else if (blk_special_request(rq)) {
963 pc = (idefloppy_pc_t *) rq->buffer;
964 } else if (blk_pc_request(rq)) {
965 pc = idefloppy_next_pc_storage(drive);
966 idefloppy_blockpc_cmd(floppy, pc, rq);
968 blk_dump_rq_flags(rq,
969 "ide-floppy: unsupported command in queue");
970 idefloppy_do_end_request(drive, 0, 0);
975 return idefloppy_issue_pc(drive, pc);
979 * idefloppy_queue_pc_tail adds a special packet command request to the
980 * tail of the request queue, and waits for it to be serviced.
982 static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc)
984 struct ide_floppy_obj *floppy = drive->driver_data;
987 ide_init_drive_cmd (&rq);
988 rq.buffer = (char *) pc;
989 rq.cmd_type = REQ_TYPE_SPECIAL;
990 rq.rq_disk = floppy->disk;
992 return ide_do_drive_cmd(drive, &rq, ide_wait);
996 * Look at the flexible disk page parameters. We ignore the CHS capacity
997 * parameters and use the LBA parameters instead.
999 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
1001 idefloppy_floppy_t *floppy = drive->driver_data;
1004 int capacity, lba_capacity;
1005 u16 transfer_rate, sector_size, cyls, rpm;
1008 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
1009 MODE_SENSE_CURRENT);
1011 if (idefloppy_queue_pc_tail(drive, &pc)) {
1012 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
1016 floppy->wp = !!(pc.buffer[3] & 0x80);
1017 set_disk_ro(floppy->disk, floppy->wp);
1018 page = &pc.buffer[8];
1020 transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]);
1021 sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]);
1022 cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]);
1023 rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]);
1024 heads = pc.buffer[8 + 4];
1025 sectors = pc.buffer[8 + 5];
1027 capacity = cyls * heads * sectors * sector_size;
1029 if (memcmp(page, &floppy->flexible_disk_page, 32))
1030 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
1031 "%d sector size, %d rpm\n",
1032 drive->name, capacity / 1024, cyls, heads,
1033 sectors, transfer_rate / 8, sector_size, rpm);
1035 memcpy(&floppy->flexible_disk_page, page, 32);
1036 drive->bios_cyl = cyls;
1037 drive->bios_head = heads;
1038 drive->bios_sect = sectors;
1039 lba_capacity = floppy->blocks * floppy->block_size;
1041 if (capacity < lba_capacity) {
1042 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
1043 "bytes, but the drive only handles %d\n",
1044 drive->name, lba_capacity, capacity);
1045 floppy->blocks = floppy->block_size ?
1046 capacity / floppy->block_size : 0;
1051 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
1053 idefloppy_floppy_t *floppy = drive->driver_data;
1057 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
1058 MODE_SENSE_CURRENT);
1060 set_bit(PC_SUPPRESS_ERROR, &pc.flags);
1061 if (idefloppy_queue_pc_tail(drive, &pc))
1064 floppy->srfp = pc.buffer[8 + 2] & 0x40;
1069 * Determine if a media is present in the floppy drive, and if so, its LBA
1072 static int ide_floppy_get_capacity(ide_drive_t *drive)
1074 idefloppy_floppy_t *floppy = drive->driver_data;
1077 u8 header_len, desc_cnt;
1078 int i, rc = 1, blocks, length;
1080 drive->bios_cyl = 0;
1081 drive->bios_head = drive->bios_sect = 0;
1083 floppy->bs_factor = 1;
1084 set_capacity(floppy->disk, 0);
1086 idefloppy_create_read_capacity_cmd(&pc);
1087 if (idefloppy_queue_pc_tail(drive, &pc)) {
1088 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1091 header_len = pc.buffer[3];
1092 cap_desc = &pc.buffer[4];
1093 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1095 for (i = 0; i < desc_cnt; i++) {
1096 unsigned int desc_start = 4 + i*8;
1098 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1099 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1101 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1102 i, blocks * length / 1024, blocks, length);
1107 * the code below is valid only for the 1st descriptor, ie i=0
1110 switch (pc.buffer[desc_start + 4] & 0x03) {
1111 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1112 case CAPACITY_UNFORMATTED:
1113 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1115 * If it is not a clik drive, break out
1116 * (maintains previous driver behaviour)
1119 case CAPACITY_CURRENT:
1120 /* Normal Zip/LS-120 disks */
1121 if (memcmp(cap_desc, &floppy->cap_desc, 8))
1122 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1123 "sector size\n", drive->name,
1124 blocks * length / 1024, blocks, length);
1125 memcpy(&floppy->cap_desc, cap_desc, 8);
1127 if (!length || length % 512) {
1128 printk(KERN_NOTICE "%s: %d bytes block size "
1129 "not supported\n", drive->name, length);
1131 floppy->blocks = blocks;
1132 floppy->block_size = length;
1133 floppy->bs_factor = length / 512;
1134 if (floppy->bs_factor != 1)
1135 printk(KERN_NOTICE "%s: warning: non "
1136 "512 bytes block size not "
1137 "fully supported\n",
1142 case CAPACITY_NO_CARTRIDGE:
1144 * This is a KERN_ERR so it appears on screen
1145 * for the user to see
1147 printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1149 case CAPACITY_INVALID:
1150 printk(KERN_ERR "%s: Invalid capacity for disk "
1151 "in drive\n", drive->name);
1154 debug_log("Descriptor 0 Code: %d\n",
1155 pc.buffer[desc_start + 4] & 0x03);
1158 /* Clik! disk does not support get_flexible_disk_page */
1159 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags))
1160 (void) ide_floppy_get_flexible_disk_page(drive);
1162 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1167 * Obtain the list of formattable capacities.
1168 * Very similar to ide_floppy_get_capacity, except that we push the capacity
1169 * descriptors to userland, instead of our own structures.
1171 * Userland gives us the following structure:
1173 * struct idefloppy_format_capacities {
1181 * userland initializes nformats to the number of allocated formats[] records.
1182 * On exit we set nformats to the number of records we've actually initialized.
1185 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1188 u8 header_len, desc_cnt;
1189 int i, blocks, length, u_array_size, u_index;
1192 if (get_user(u_array_size, arg))
1195 if (u_array_size <= 0)
1198 idefloppy_create_read_capacity_cmd(&pc);
1199 if (idefloppy_queue_pc_tail(drive, &pc)) {
1200 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1203 header_len = pc.buffer[3];
1204 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1210 * We always skip the first capacity descriptor. That's the current
1211 * capacity. We are interested in the remaining descriptors, the
1212 * formattable capacities.
1214 for (i = 1; i < desc_cnt; i++) {
1215 unsigned int desc_start = 4 + i*8;
1217 if (u_index >= u_array_size)
1218 break; /* User-supplied buffer too small */
1220 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]);
1221 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]);
1223 if (put_user(blocks, argp))
1227 if (put_user(length, argp))
1234 if (put_user(u_index, arg))
1240 ** Get ATAPI_FORMAT_UNIT progress indication.
1242 ** Userland gives a pointer to an int. The int is set to a progress
1243 ** indicator 0-65536, with 65536=100%.
1245 ** If the drive does not support format progress indication, we just check
1246 ** the dsc bit, and return either 0 or 65536.
1249 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1251 idefloppy_floppy_t *floppy = drive->driver_data;
1253 int progress_indication = 0x10000;
1256 idefloppy_create_request_sense_cmd(&pc);
1257 if (idefloppy_queue_pc_tail(drive, &pc)) {
1261 if (floppy->sense_key == 2 &&
1263 floppy->ascq == 4) {
1264 progress_indication = floppy->progress_indication;
1266 /* Else assume format_unit has finished, and we're
1269 unsigned long flags;
1272 local_irq_save(flags);
1273 stat = drive->hwif->INB(IDE_STATUS_REG);
1274 local_irq_restore(flags);
1276 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1278 if (put_user(progress_indication, arg))
1285 * Return the current floppy capacity.
1287 static sector_t idefloppy_capacity (ide_drive_t *drive)
1289 idefloppy_floppy_t *floppy = drive->driver_data;
1290 unsigned long capacity = floppy->blocks * floppy->bs_factor;
1296 * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1299 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1301 struct idefloppy_id_gcw gcw;
1303 *((u16 *) &gcw) = id->config;
1306 /* kludge for Apple PowerBook internal zip */
1307 if ((gcw.device_type == 5) &&
1308 !strstr(id->model, "CD-ROM") &&
1309 strstr(id->model, "ZIP"))
1310 gcw.device_type = 0;
1313 if (gcw.protocol != 2)
1314 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1316 else if (gcw.device_type != 0)
1317 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1318 "to floppy\n", gcw.device_type);
1319 else if (!gcw.removable)
1320 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1321 else if (gcw.drq_type == 3) {
1322 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1323 "supported\n", gcw.drq_type);
1324 } else if (gcw.packet_size != 0) {
1325 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1326 "bytes long\n", gcw.packet_size);
1332 #ifdef CONFIG_IDE_PROC_FS
1333 static void idefloppy_add_settings(ide_drive_t *drive)
1335 idefloppy_floppy_t *floppy = drive->driver_data;
1338 * drive setting name read/write data type min max mul_factor div_factor data pointer set function
1340 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL);
1341 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL);
1342 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL);
1343 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL);
1346 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1350 * Driver initialization.
1352 static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy)
1354 struct idefloppy_id_gcw gcw;
1356 *((u16 *) &gcw) = drive->id->config;
1357 floppy->pc = floppy->pc_stack;
1358 if (gcw.drq_type == 1)
1359 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags);
1361 * We used to check revisions here. At this point however
1362 * I'm giving up. Just assume they are all broken, its easier.
1364 * The actual reason for the workarounds was likely
1365 * a driver bug after all rather than a firmware bug,
1366 * and the workaround below used to hide it. It should
1367 * be fixed as of version 1.9, but to be on the safe side
1368 * we'll leave the limitation below for the 2.2.x tree.
1371 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1372 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags);
1373 /* This value will be visible in the /proc/ide/hdx/settings */
1374 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1375 blk_queue_max_sectors(drive->queue, 64);
1379 * Guess what? The IOMEGA Clik! drive also needs the
1380 * above fix. It makes nasty clicking noises without
1381 * it, so please don't remove this.
1383 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1384 blk_queue_max_sectors(drive->queue, 64);
1385 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags);
1389 (void) ide_floppy_get_capacity(drive);
1390 idefloppy_add_settings(drive);
1393 static void ide_floppy_remove(ide_drive_t *drive)
1395 idefloppy_floppy_t *floppy = drive->driver_data;
1396 struct gendisk *g = floppy->disk;
1398 ide_proc_unregister_driver(drive, floppy->driver);
1402 ide_floppy_put(floppy);
1405 static void idefloppy_cleanup_obj(struct kref *kref)
1407 struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1408 ide_drive_t *drive = floppy->drive;
1409 struct gendisk *g = floppy->disk;
1411 drive->driver_data = NULL;
1412 g->private_data = NULL;
1417 #ifdef CONFIG_IDE_PROC_FS
1418 static int proc_idefloppy_read_capacity
1419 (char *page, char **start, off_t off, int count, int *eof, void *data)
1421 ide_drive_t*drive = (ide_drive_t *)data;
1424 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive));
1425 PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
1428 static ide_proc_entry_t idefloppy_proc[] = {
1429 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL },
1430 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL },
1431 { NULL, 0, NULL, NULL }
1433 #endif /* CONFIG_IDE_PROC_FS */
1435 static int ide_floppy_probe(ide_drive_t *);
1437 static ide_driver_t idefloppy_driver = {
1439 .owner = THIS_MODULE,
1440 .name = "ide-floppy",
1441 .bus = &ide_bus_type,
1443 .probe = ide_floppy_probe,
1444 .remove = ide_floppy_remove,
1445 .version = IDEFLOPPY_VERSION,
1446 .media = ide_floppy,
1447 .supports_dsc_overlap = 0,
1448 .do_request = idefloppy_do_request,
1449 .end_request = idefloppy_do_end_request,
1450 .error = __ide_error,
1451 .abort = __ide_abort,
1452 #ifdef CONFIG_IDE_PROC_FS
1453 .proc = idefloppy_proc,
1457 static int idefloppy_open(struct inode *inode, struct file *filp)
1459 struct gendisk *disk = inode->i_bdev->bd_disk;
1460 struct ide_floppy_obj *floppy;
1465 debug_log("Reached %s\n", __func__);
1467 if (!(floppy = ide_floppy_get(disk)))
1470 drive = floppy->drive;
1474 if (floppy->openers == 1) {
1475 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1478 idefloppy_create_test_unit_ready_cmd(&pc);
1479 if (idefloppy_queue_pc_tail(drive, &pc)) {
1480 idefloppy_create_start_stop_cmd(&pc, 1);
1481 (void) idefloppy_queue_pc_tail(drive, &pc);
1484 if (ide_floppy_get_capacity(drive)
1485 && (filp->f_flags & O_NDELAY) == 0
1487 ** Allow O_NDELAY to open a drive without a disk, or with
1488 ** an unreadable disk, so that we can get the format
1489 ** capacity of the drive or begin the format - Sam
1493 goto out_put_floppy;
1496 if (floppy->wp && (filp->f_mode & 2)) {
1498 goto out_put_floppy;
1500 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1501 /* IOMEGA Clik! drives do not support lock/unlock commands */
1502 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1503 idefloppy_create_prevent_cmd(&pc, 1);
1504 (void) idefloppy_queue_pc_tail(drive, &pc);
1506 check_disk_change(inode->i_bdev);
1507 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) {
1509 goto out_put_floppy;
1515 ide_floppy_put(floppy);
1519 static int idefloppy_release(struct inode *inode, struct file *filp)
1521 struct gendisk *disk = inode->i_bdev->bd_disk;
1522 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1523 ide_drive_t *drive = floppy->drive;
1526 debug_log("Reached %s\n", __func__);
1528 if (floppy->openers == 1) {
1529 /* IOMEGA Clik! drives do not support lock/unlock commands */
1530 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1531 idefloppy_create_prevent_cmd(&pc, 0);
1532 (void) idefloppy_queue_pc_tail(drive, &pc);
1535 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1540 ide_floppy_put(floppy);
1545 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1547 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1548 ide_drive_t *drive = floppy->drive;
1550 geo->heads = drive->bios_head;
1551 geo->sectors = drive->bios_sect;
1552 geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1556 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc,
1557 unsigned long arg, unsigned int cmd)
1559 if (floppy->openers > 1)
1562 /* The IOMEGA Clik! Drive doesn't support this command -
1563 * no room for an eject mechanism */
1564 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) {
1565 int prevent = arg ? 1 : 0;
1567 if (cmd == CDROMEJECT)
1570 idefloppy_create_prevent_cmd(pc, prevent);
1571 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1574 if (cmd == CDROMEJECT) {
1575 idefloppy_create_start_stop_cmd(pc, 2);
1576 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1582 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1585 int blocks, length, flags, err = 0;
1588 if (floppy->openers > 1) {
1589 /* Don't format if someone is using the disk */
1590 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1594 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1597 * Send ATAPI_FORMAT_UNIT to the drive.
1599 * Userland gives us the following structure:
1601 * struct idefloppy_format_command {
1607 * flags is a bitmask, currently, the only defined flag is:
1609 * 0x01 - verify media after format.
1611 if (get_user(blocks, arg) ||
1612 get_user(length, arg+1) ||
1613 get_user(flags, arg+2)) {
1618 (void) idefloppy_get_sfrp_bit(floppy->drive);
1619 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1621 if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1626 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags);
1631 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1632 unsigned int cmd, unsigned long arg)
1634 struct block_device *bdev = inode->i_bdev;
1635 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1636 ide_drive_t *drive = floppy->drive;
1638 void __user *argp = (void __user *)arg;
1644 case CDROM_LOCKDOOR:
1645 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1646 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1648 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1649 return ide_floppy_get_format_capacities(drive, argp);
1650 case IDEFLOPPY_IOCTL_FORMAT_START:
1651 if (!(file->f_mode & 2))
1654 return ide_floppy_format_unit(floppy, (int __user *)arg);
1655 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1656 return idefloppy_get_format_progress(drive, argp);
1660 * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1661 * and CDROM_SEND_PACKET (legacy) ioctls
1663 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1664 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1665 bdev->bd_disk, cmd, argp);
1670 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1675 static int idefloppy_media_changed(struct gendisk *disk)
1677 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1678 ide_drive_t *drive = floppy->drive;
1680 /* do not scan partitions twice if this is a removable device */
1681 if (drive->attach) {
1685 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags);
1688 static int idefloppy_revalidate_disk(struct gendisk *disk)
1690 struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1691 set_capacity(disk, idefloppy_capacity(floppy->drive));
1695 static struct block_device_operations idefloppy_ops = {
1696 .owner = THIS_MODULE,
1697 .open = idefloppy_open,
1698 .release = idefloppy_release,
1699 .ioctl = idefloppy_ioctl,
1700 .getgeo = idefloppy_getgeo,
1701 .media_changed = idefloppy_media_changed,
1702 .revalidate_disk= idefloppy_revalidate_disk
1705 static int ide_floppy_probe(ide_drive_t *drive)
1707 idefloppy_floppy_t *floppy;
1710 if (!strstr("ide-floppy", drive->driver_req))
1712 if (!drive->present)
1714 if (drive->media != ide_floppy)
1716 if (!idefloppy_identify_device (drive, drive->id)) {
1717 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name);
1721 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name);
1724 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) {
1725 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name);
1729 g = alloc_disk(1 << PARTN_BITS);
1731 goto out_free_floppy;
1733 ide_init_disk(g, drive);
1735 ide_proc_register_driver(drive, &idefloppy_driver);
1737 kref_init(&floppy->kref);
1739 floppy->drive = drive;
1740 floppy->driver = &idefloppy_driver;
1743 g->private_data = &floppy->driver;
1745 drive->driver_data = floppy;
1747 idefloppy_setup (drive, floppy);
1749 g->minors = 1 << PARTN_BITS;
1750 g->driverfs_dev = &drive->gendev;
1751 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1752 g->fops = &idefloppy_ops;
1763 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1765 static void __exit idefloppy_exit (void)
1767 driver_unregister(&idefloppy_driver.gen_driver);
1770 static int __init idefloppy_init(void)
1772 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1773 return driver_register(&idefloppy_driver.gen_driver);
1776 MODULE_ALIAS("ide:*m-floppy*");
1777 module_init(idefloppy_init);
1778 module_exit(idefloppy_exit);
1779 MODULE_LICENSE("GPL");