Merge git://git.kernel.org/pub/scm/linux/kernel/git/bart/ide-2.6
[linux-2.6.git] / drivers / ide / ide-floppy.c
1 /*
2  * IDE ATAPI floppy driver.
3  *
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
7  *
8  * This driver supports the following IDE floppy drives:
9  *
10  * LS-120/240 SuperDisk
11  * Iomega Zip 100/250
12  * Iomega PC Card Clik!/PocketZip
13  *
14  * For a historical changelog see
15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
16  */
17
18 #define IDEFLOPPY_VERSION "1.00"
19
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>
26 #include <linux/mm.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>
36
37 #include <scsi/scsi_ioctl.h>
38
39 #include <asm/byteorder.h>
40 #include <linux/irq.h>
41 #include <linux/uaccess.h>
42 #include <linux/io.h>
43 #include <asm/unaligned.h>
44
45 /* define to see debug info */
46 #define IDEFLOPPY_DEBUG_LOG             0
47
48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
49 #define IDEFLOPPY_DEBUG(fmt, args...)
50
51 #if IDEFLOPPY_DEBUG_LOG
52 #define debug_log(fmt, args...) \
53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
54 #else
55 #define debug_log(fmt, args...) do {} while (0)
56 #endif
57
58
59 /* Some drives require a longer irq timeout. */
60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
61
62 /*
63  * After each failed packet command we issue a request sense command and retry
64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
65  */
66 #define IDEFLOPPY_MAX_PC_RETRIES        3
67
68 /*
69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
70  * bytes.
71  */
72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
73
74 /*
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.
78  */
79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
80
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
86
87 /*
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.
91  */
92 typedef struct ide_floppy_obj {
93         ide_drive_t     *drive;
94         ide_driver_t    *driver;
95         struct gendisk  *disk;
96         struct kref     kref;
97         unsigned int    openers;        /* protected by BKL for now */
98
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 */
106         int pc_stack_index;
107         struct request rq_stack[IDEFLOPPY_PC_STACK];
108         /* We implement a circular array */
109         int rq_stack_index;
110
111         /* Last error information */
112         u8 sense_key, asc, ascq;
113         /* delay this long before sending packet command */
114         u8 ticks;
115         int progress_indication;
116
117         /* Device information */
118         /* Current format */
119         int blocks, block_size, bs_factor;
120         /* Last format capacity descriptor */
121         u8 cap_desc[8];
122         /* Copy of the flexible disk page */
123         u8 flexible_disk_page[32];
124         /* Write protect */
125         int wp;
126         /* Supports format progress report */
127         int srfp;
128 } idefloppy_floppy_t;
129
130 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
131
132 /* Defines for the MODE SENSE command */
133 #define MODE_SENSE_CURRENT              0x00
134 #define MODE_SENSE_CHANGEABLE           0x01
135 #define MODE_SENSE_DEFAULT              0x02
136 #define MODE_SENSE_SAVED                0x03
137
138 /* IOCTLs used in low-level formatting. */
139 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
140 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
141 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
142 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
143
144 /* Error code returned in rq->errors to the higher part of the driver. */
145 #define IDEFLOPPY_ERROR_GENERAL         101
146
147 /*
148  * Pages of the SELECT SENSE / MODE SENSE packet commands.
149  * See SFF-8070i spec.
150  */
151 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
152 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
153
154 static DEFINE_MUTEX(idefloppy_ref_mutex);
155
156 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
157
158 #define ide_floppy_g(disk) \
159         container_of((disk)->private_data, struct ide_floppy_obj, driver)
160
161 static void idefloppy_cleanup_obj(struct kref *);
162
163 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
164 {
165         struct ide_floppy_obj *floppy = NULL;
166
167         mutex_lock(&idefloppy_ref_mutex);
168         floppy = ide_floppy_g(disk);
169         if (floppy) {
170                 if (ide_device_get(floppy->drive))
171                         floppy = NULL;
172                 else
173                         kref_get(&floppy->kref);
174         }
175         mutex_unlock(&idefloppy_ref_mutex);
176         return floppy;
177 }
178
179 static void ide_floppy_put(struct ide_floppy_obj *floppy)
180 {
181         ide_drive_t *drive = floppy->drive;
182
183         mutex_lock(&idefloppy_ref_mutex);
184         kref_put(&floppy->kref, idefloppy_cleanup_obj);
185         ide_device_put(drive);
186         mutex_unlock(&idefloppy_ref_mutex);
187 }
188
189 /*
190  * Used to finish servicing a request. For read/write requests, we will call
191  * ide_end_request to pass to the next buffer.
192  */
193 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
194 {
195         idefloppy_floppy_t *floppy = drive->driver_data;
196         struct request *rq = HWGROUP(drive)->rq;
197         int error;
198
199         debug_log("Reached %s\n", __func__);
200
201         switch (uptodate) {
202         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
203         case 1: error = 0; break;
204         default: error = uptodate;
205         }
206         if (error)
207                 floppy->failed_pc = NULL;
208         /* Why does this happen? */
209         if (!rq)
210                 return 0;
211         if (!blk_special_request(rq)) {
212                 /* our real local end request function */
213                 ide_end_request(drive, uptodate, nsecs);
214                 return 0;
215         }
216         rq->errors = error;
217         /* fixme: need to move this local also */
218         ide_end_drive_cmd(drive, 0, 0);
219         return 0;
220 }
221
222 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
223                                   unsigned int bcount, int direction)
224 {
225         ide_hwif_t *hwif = drive->hwif;
226         struct request *rq = pc->rq;
227         struct req_iterator iter;
228         struct bio_vec *bvec;
229         unsigned long flags;
230         int count, done = 0;
231         char *data;
232
233         rq_for_each_segment(bvec, rq, iter) {
234                 if (!bcount)
235                         break;
236
237                 count = min(bvec->bv_len, bcount);
238
239                 data = bvec_kmap_irq(bvec, &flags);
240                 if (direction)
241                         hwif->tp_ops->output_data(drive, NULL, data, count);
242                 else
243                         hwif->tp_ops->input_data(drive, NULL, data, count);
244                 bvec_kunmap_irq(data, &flags);
245
246                 bcount -= count;
247                 pc->b_count += count;
248                 done += count;
249         }
250
251         idefloppy_end_request(drive, 1, done >> 9);
252
253         if (bcount) {
254                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
255                                 drive->name, __func__, bcount);
256                 ide_pad_transfer(drive, direction, bcount);
257         }
258 }
259
260 static void idefloppy_update_buffers(ide_drive_t *drive,
261                                 struct ide_atapi_pc *pc)
262 {
263         struct request *rq = pc->rq;
264         struct bio *bio = rq->bio;
265
266         while ((bio = rq->bio) != NULL)
267                 idefloppy_end_request(drive, 1, 0);
268 }
269
270 /*
271  * Generate a new packet command request in front of the request queue, before
272  * the current request so that it will be processed immediately, on the next
273  * pass through the driver.
274  */
275 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
276                 struct request *rq)
277 {
278         struct ide_floppy_obj *floppy = drive->driver_data;
279
280         blk_rq_init(NULL, rq);
281         rq->buffer = (char *) pc;
282         rq->cmd_type = REQ_TYPE_SPECIAL;
283         rq->cmd_flags |= REQ_PREEMPT;
284         rq->rq_disk = floppy->disk;
285         memcpy(rq->cmd, pc->c, 12);
286         ide_do_drive_cmd(drive, rq);
287 }
288
289 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
290 {
291         idefloppy_floppy_t *floppy = drive->driver_data;
292
293         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
294                 floppy->pc_stack_index = 0;
295         return (&floppy->pc_stack[floppy->pc_stack_index++]);
296 }
297
298 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
299 {
300         idefloppy_floppy_t *floppy = drive->driver_data;
301
302         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
303                 floppy->rq_stack_index = 0;
304         return (&floppy->rq_stack[floppy->rq_stack_index++]);
305 }
306
307 static void ide_floppy_callback(ide_drive_t *drive)
308 {
309         idefloppy_floppy_t *floppy = drive->driver_data;
310         struct ide_atapi_pc *pc = floppy->pc;
311         int uptodate = pc->error ? 0 : 1;
312
313         debug_log("Reached %s\n", __func__);
314
315         if (floppy->failed_pc == pc)
316                 floppy->failed_pc = NULL;
317
318         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
319             (pc->rq && blk_pc_request(pc->rq)))
320                 uptodate = 1; /* FIXME */
321         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
322                 u8 *buf = floppy->pc->buf;
323
324                 if (!pc->error) {
325                         floppy->sense_key = buf[2] & 0x0F;
326                         floppy->asc = buf[12];
327                         floppy->ascq = buf[13];
328                         floppy->progress_indication = buf[15] & 0x80 ?
329                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
330
331                         if (floppy->failed_pc)
332                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
333
334                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
335                                   floppy->sense_key, floppy->asc, floppy->ascq);
336                 } else
337                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
338                                         "Aborting request!\n");
339         }
340
341         idefloppy_end_request(drive, uptodate, 0);
342 }
343
344 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
345 {
346         memset(pc, 0, sizeof(*pc));
347         pc->buf = pc->pc_buf;
348         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
349 }
350
351 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
352 {
353         idefloppy_init_pc(pc);
354         pc->c[0] = GPCMD_REQUEST_SENSE;
355         pc->c[4] = 255;
356         pc->req_xfer = 18;
357 }
358
359 /*
360  * Called when an error was detected during the last packet command. We queue a
361  * request sense packet command in the head of the request list.
362  */
363 static void idefloppy_retry_pc(ide_drive_t *drive)
364 {
365         struct ide_atapi_pc *pc;
366         struct request *rq;
367
368         (void)ide_read_error(drive);
369         pc = idefloppy_next_pc_storage(drive);
370         rq = idefloppy_next_rq_storage(drive);
371         idefloppy_create_request_sense_cmd(pc);
372         idefloppy_queue_pc_head(drive, pc, rq);
373 }
374
375 /* The usual interrupt handler called during a packet command. */
376 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
377 {
378         idefloppy_floppy_t *floppy = drive->driver_data;
379
380         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
381                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
382                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
383 }
384
385 /*
386  * What we have here is a classic case of a top half / bottom half interrupt
387  * service routine. In interrupt mode, the device sends an interrupt to signal
388  * that it is ready to receive a packet. However, we need to delay about 2-3
389  * ticks before issuing the packet or we gets in trouble.
390  */
391 static int idefloppy_transfer_pc(ide_drive_t *drive)
392 {
393         idefloppy_floppy_t *floppy = drive->driver_data;
394
395         /* Send the actual packet */
396         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
397
398         /* Timeout for the packet command */
399         return IDEFLOPPY_WAIT_CMD;
400 }
401
402
403 /*
404  * Called as an interrupt (or directly). When the device says it's ready for a
405  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
406  * transfer_pc.
407  */
408 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
409 {
410         idefloppy_floppy_t *floppy = drive->driver_data;
411         struct ide_atapi_pc *pc = floppy->pc;
412         ide_expiry_t *expiry;
413         unsigned int timeout;
414
415         /*
416          * The following delay solves a problem with ATAPI Zip 100 drives
417          * where the Busy flag was apparently being deasserted before the
418          * unit was ready to receive data. This was happening on a
419          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
420          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
421          * used until after the packet is moved in about 50 msec.
422          */
423         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
424                 timeout = floppy->ticks;
425                 expiry = &idefloppy_transfer_pc;
426         } else {
427                 timeout = IDEFLOPPY_WAIT_CMD;
428                 expiry = NULL;
429         }
430
431         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
432 }
433
434 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
435                                     struct ide_atapi_pc *pc)
436 {
437         /* supress error messages resulting from Medium not present */
438         if (floppy->sense_key == 0x02 &&
439             floppy->asc       == 0x3a &&
440             floppy->ascq      == 0x00)
441                 return;
442
443         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
444                         "asc = %2x, ascq = %2x\n",
445                         floppy->drive->name, pc->c[0], floppy->sense_key,
446                         floppy->asc, floppy->ascq);
447
448 }
449
450 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
451                 struct ide_atapi_pc *pc)
452 {
453         idefloppy_floppy_t *floppy = drive->driver_data;
454
455         if (floppy->failed_pc == NULL &&
456             pc->c[0] != GPCMD_REQUEST_SENSE)
457                 floppy->failed_pc = pc;
458         /* Set the current packet command */
459         floppy->pc = pc;
460
461         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
462                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
463                         ide_floppy_report_error(floppy, pc);
464                 /* Giving up */
465                 pc->error = IDEFLOPPY_ERROR_GENERAL;
466
467                 floppy->failed_pc = NULL;
468                 drive->pc_callback(drive);
469                 return ide_stopped;
470         }
471
472         debug_log("Retry number - %d\n", pc->retries);
473
474         pc->retries++;
475
476         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
477                             IDEFLOPPY_WAIT_CMD, NULL);
478 }
479
480 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
481 {
482         debug_log("creating prevent removal command, prevent = %d\n", prevent);
483
484         idefloppy_init_pc(pc);
485         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
486         pc->c[4] = prevent;
487 }
488
489 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
490 {
491         idefloppy_init_pc(pc);
492         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
493         pc->c[7] = 255;
494         pc->c[8] = 255;
495         pc->req_xfer = 255;
496 }
497
498 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
499                 int l, int flags)
500 {
501         idefloppy_init_pc(pc);
502         pc->c[0] = GPCMD_FORMAT_UNIT;
503         pc->c[1] = 0x17;
504
505         memset(pc->buf, 0, 12);
506         pc->buf[1] = 0xA2;
507         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
508
509         if (flags & 1)                          /* Verify bit on... */
510                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
511         pc->buf[3] = 8;
512
513         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
514         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
515         pc->buf_size = 12;
516         pc->flags |= PC_FLAG_WRITING;
517 }
518
519 /* A mode sense command is used to "sense" floppy parameters. */
520 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
521                 u8 page_code, u8 type)
522 {
523         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
524
525         idefloppy_init_pc(pc);
526         pc->c[0] = GPCMD_MODE_SENSE_10;
527         pc->c[1] = 0;
528         pc->c[2] = page_code + (type << 6);
529
530         switch (page_code) {
531         case IDEFLOPPY_CAPABILITIES_PAGE:
532                 length += 12;
533                 break;
534         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
535                 length += 32;
536                 break;
537         default:
538                 printk(KERN_ERR "ide-floppy: unsupported page code "
539                                 "in create_mode_sense_cmd\n");
540         }
541         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
542         pc->req_xfer = length;
543 }
544
545 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
546 {
547         idefloppy_init_pc(pc);
548         pc->c[0] = GPCMD_START_STOP_UNIT;
549         pc->c[4] = start;
550 }
551
552 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
553                                     struct ide_atapi_pc *pc, struct request *rq,
554                                     unsigned long sector)
555 {
556         int block = sector / floppy->bs_factor;
557         int blocks = rq->nr_sectors / floppy->bs_factor;
558         int cmd = rq_data_dir(rq);
559
560         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
561                 block, blocks);
562
563         idefloppy_init_pc(pc);
564         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
565         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
566         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
567
568         memcpy(rq->cmd, pc->c, 12);
569
570         pc->rq = rq;
571         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
572         if (rq->cmd_flags & REQ_RW)
573                 pc->flags |= PC_FLAG_WRITING;
574         pc->buf = NULL;
575         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
576         pc->flags |= PC_FLAG_DMA_OK;
577 }
578
579 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
580                 struct ide_atapi_pc *pc, struct request *rq)
581 {
582         idefloppy_init_pc(pc);
583         memcpy(pc->c, rq->cmd, sizeof(pc->c));
584         pc->rq = rq;
585         pc->b_count = rq->data_len;
586         if (rq->data_len && rq_data_dir(rq) == WRITE)
587                 pc->flags |= PC_FLAG_WRITING;
588         pc->buf = rq->data;
589         if (rq->bio)
590                 pc->flags |= PC_FLAG_DMA_OK;
591         /*
592          * possibly problematic, doesn't look like ide-floppy correctly
593          * handled scattered requests if dma fails...
594          */
595         pc->req_xfer = pc->buf_size = rq->data_len;
596 }
597
598 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
599                 struct request *rq, sector_t block_s)
600 {
601         idefloppy_floppy_t *floppy = drive->driver_data;
602         struct ide_atapi_pc *pc;
603         unsigned long block = (unsigned long)block_s;
604
605         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
606                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
607                         rq->cmd_type, rq->errors);
608         debug_log("sector: %ld, nr_sectors: %ld, "
609                         "current_nr_sectors: %d\n", (long)rq->sector,
610                         rq->nr_sectors, rq->current_nr_sectors);
611
612         if (rq->errors >= ERROR_MAX) {
613                 if (floppy->failed_pc)
614                         ide_floppy_report_error(floppy, floppy->failed_pc);
615                 else
616                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
617                                 drive->name);
618                 idefloppy_end_request(drive, 0, 0);
619                 return ide_stopped;
620         }
621         if (blk_fs_request(rq)) {
622                 if (((long)rq->sector % floppy->bs_factor) ||
623                     (rq->nr_sectors % floppy->bs_factor)) {
624                         printk(KERN_ERR "%s: unsupported r/w request size\n",
625                                         drive->name);
626                         idefloppy_end_request(drive, 0, 0);
627                         return ide_stopped;
628                 }
629                 pc = idefloppy_next_pc_storage(drive);
630                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
631         } else if (blk_special_request(rq)) {
632                 pc = (struct ide_atapi_pc *) rq->buffer;
633         } else if (blk_pc_request(rq)) {
634                 pc = idefloppy_next_pc_storage(drive);
635                 idefloppy_blockpc_cmd(floppy, pc, rq);
636         } else {
637                 blk_dump_rq_flags(rq,
638                         "ide-floppy: unsupported command in queue");
639                 idefloppy_end_request(drive, 0, 0);
640                 return ide_stopped;
641         }
642
643         pc->rq = rq;
644
645         return idefloppy_issue_pc(drive, pc);
646 }
647
648 /*
649  * Add a special packet command request to the tail of the request queue,
650  * and wait for it to be serviced.
651  */
652 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
653 {
654         struct ide_floppy_obj *floppy = drive->driver_data;
655         struct request *rq;
656         int error;
657
658         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
659         rq->buffer = (char *) pc;
660         rq->cmd_type = REQ_TYPE_SPECIAL;
661         memcpy(rq->cmd, pc->c, 12);
662         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
663         blk_put_request(rq);
664
665         return error;
666 }
667
668 /*
669  * Look at the flexible disk page parameters. We ignore the CHS capacity
670  * parameters and use the LBA parameters instead.
671  */
672 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
673 {
674         idefloppy_floppy_t *floppy = drive->driver_data;
675         struct ide_atapi_pc pc;
676         u8 *page;
677         int capacity, lba_capacity;
678         u16 transfer_rate, sector_size, cyls, rpm;
679         u8 heads, sectors;
680
681         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
682                                         MODE_SENSE_CURRENT);
683
684         if (idefloppy_queue_pc_tail(drive, &pc)) {
685                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
686                                 " parameters\n");
687                 return 1;
688         }
689         floppy->wp = !!(pc.buf[3] & 0x80);
690         set_disk_ro(floppy->disk, floppy->wp);
691         page = &pc.buf[8];
692
693         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
694         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
695         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
696         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
697         heads         = pc.buf[8 + 4];
698         sectors       = pc.buf[8 + 5];
699
700         capacity = cyls * heads * sectors * sector_size;
701
702         if (memcmp(page, &floppy->flexible_disk_page, 32))
703                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
704                                 "%d sector size, %d rpm\n",
705                                 drive->name, capacity / 1024, cyls, heads,
706                                 sectors, transfer_rate / 8, sector_size, rpm);
707
708         memcpy(&floppy->flexible_disk_page, page, 32);
709         drive->bios_cyl = cyls;
710         drive->bios_head = heads;
711         drive->bios_sect = sectors;
712         lba_capacity = floppy->blocks * floppy->block_size;
713
714         if (capacity < lba_capacity) {
715                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
716                         "bytes, but the drive only handles %d\n",
717                         drive->name, lba_capacity, capacity);
718                 floppy->blocks = floppy->block_size ?
719                         capacity / floppy->block_size : 0;
720         }
721         return 0;
722 }
723
724 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
725 {
726         idefloppy_floppy_t *floppy = drive->driver_data;
727         struct ide_atapi_pc pc;
728
729         floppy->srfp = 0;
730         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
731                                                  MODE_SENSE_CURRENT);
732
733         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
734         if (idefloppy_queue_pc_tail(drive, &pc))
735                 return 1;
736
737         floppy->srfp = pc.buf[8 + 2] & 0x40;
738         return (0);
739 }
740
741 /*
742  * Determine if a media is present in the floppy drive, and if so, its LBA
743  * capacity.
744  */
745 static int ide_floppy_get_capacity(ide_drive_t *drive)
746 {
747         idefloppy_floppy_t *floppy = drive->driver_data;
748         struct ide_atapi_pc pc;
749         u8 *cap_desc;
750         u8 header_len, desc_cnt;
751         int i, rc = 1, blocks, length;
752
753         drive->bios_cyl = 0;
754         drive->bios_head = drive->bios_sect = 0;
755         floppy->blocks = 0;
756         floppy->bs_factor = 1;
757         set_capacity(floppy->disk, 0);
758
759         idefloppy_create_read_capacity_cmd(&pc);
760         if (idefloppy_queue_pc_tail(drive, &pc)) {
761                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
762                 return 1;
763         }
764         header_len = pc.buf[3];
765         cap_desc = &pc.buf[4];
766         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
767
768         for (i = 0; i < desc_cnt; i++) {
769                 unsigned int desc_start = 4 + i*8;
770
771                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
772                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
773
774                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
775                                 i, blocks * length / 1024, blocks, length);
776
777                 if (i)
778                         continue;
779                 /*
780                  * the code below is valid only for the 1st descriptor, ie i=0
781                  */
782
783                 switch (pc.buf[desc_start + 4] & 0x03) {
784                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
785                 case CAPACITY_UNFORMATTED:
786                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
787                                 /*
788                                  * If it is not a clik drive, break out
789                                  * (maintains previous driver behaviour)
790                                  */
791                                 break;
792                 case CAPACITY_CURRENT:
793                         /* Normal Zip/LS-120 disks */
794                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
795                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
796                                         "sector size\n", drive->name,
797                                         blocks * length / 1024, blocks, length);
798                         memcpy(&floppy->cap_desc, cap_desc, 8);
799
800                         if (!length || length % 512) {
801                                 printk(KERN_NOTICE "%s: %d bytes block size "
802                                         "not supported\n", drive->name, length);
803                         } else {
804                                 floppy->blocks = blocks;
805                                 floppy->block_size = length;
806                                 floppy->bs_factor = length / 512;
807                                 if (floppy->bs_factor != 1)
808                                         printk(KERN_NOTICE "%s: warning: non "
809                                                 "512 bytes block size not "
810                                                 "fully supported\n",
811                                                 drive->name);
812                                 rc = 0;
813                         }
814                         break;
815                 case CAPACITY_NO_CARTRIDGE:
816                         /*
817                          * This is a KERN_ERR so it appears on screen
818                          * for the user to see
819                          */
820                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
821                         break;
822                 case CAPACITY_INVALID:
823                         printk(KERN_ERR "%s: Invalid capacity for disk "
824                                 "in drive\n", drive->name);
825                         break;
826                 }
827                 debug_log("Descriptor 0 Code: %d\n",
828                           pc.buf[desc_start + 4] & 0x03);
829         }
830
831         /* Clik! disk does not support get_flexible_disk_page */
832         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
833                 (void) ide_floppy_get_flexible_disk_page(drive);
834
835         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
836         return rc;
837 }
838
839 /*
840  * Obtain the list of formattable capacities.
841  * Very similar to ide_floppy_get_capacity, except that we push the capacity
842  * descriptors to userland, instead of our own structures.
843  *
844  * Userland gives us the following structure:
845  *
846  * struct idefloppy_format_capacities {
847  *      int nformats;
848  *      struct {
849  *              int nblocks;
850  *              int blocksize;
851  *      } formats[];
852  * };
853  *
854  * userland initializes nformats to the number of allocated formats[] records.
855  * On exit we set nformats to the number of records we've actually initialized.
856  */
857
858 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
859 {
860         struct ide_atapi_pc pc;
861         u8 header_len, desc_cnt;
862         int i, blocks, length, u_array_size, u_index;
863         int __user *argp;
864
865         if (get_user(u_array_size, arg))
866                 return (-EFAULT);
867
868         if (u_array_size <= 0)
869                 return (-EINVAL);
870
871         idefloppy_create_read_capacity_cmd(&pc);
872         if (idefloppy_queue_pc_tail(drive, &pc)) {
873                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
874                 return (-EIO);
875         }
876         header_len = pc.buf[3];
877         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
878
879         u_index = 0;
880         argp = arg + 1;
881
882         /*
883          * We always skip the first capacity descriptor.  That's the current
884          * capacity.  We are interested in the remaining descriptors, the
885          * formattable capacities.
886          */
887         for (i = 1; i < desc_cnt; i++) {
888                 unsigned int desc_start = 4 + i*8;
889
890                 if (u_index >= u_array_size)
891                         break;  /* User-supplied buffer too small */
892
893                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
894                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
895
896                 if (put_user(blocks, argp))
897                         return(-EFAULT);
898                 ++argp;
899
900                 if (put_user(length, argp))
901                         return (-EFAULT);
902                 ++argp;
903
904                 ++u_index;
905         }
906
907         if (put_user(u_index, arg))
908                 return (-EFAULT);
909         return (0);
910 }
911
912 /*
913  * Get ATAPI_FORMAT_UNIT progress indication.
914  *
915  * Userland gives a pointer to an int.  The int is set to a progress
916  * indicator 0-65536, with 65536=100%.
917  *
918  * If the drive does not support format progress indication, we just check
919  * the dsc bit, and return either 0 or 65536.
920  */
921
922 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
923 {
924         idefloppy_floppy_t *floppy = drive->driver_data;
925         struct ide_atapi_pc pc;
926         int progress_indication = 0x10000;
927
928         if (floppy->srfp) {
929                 idefloppy_create_request_sense_cmd(&pc);
930                 if (idefloppy_queue_pc_tail(drive, &pc))
931                         return (-EIO);
932
933                 if (floppy->sense_key == 2 &&
934                     floppy->asc == 4 &&
935                     floppy->ascq == 4)
936                         progress_indication = floppy->progress_indication;
937
938                 /* Else assume format_unit has finished, and we're at 0x10000 */
939         } else {
940                 ide_hwif_t *hwif = drive->hwif;
941                 unsigned long flags;
942                 u8 stat;
943
944                 local_irq_save(flags);
945                 stat = hwif->tp_ops->read_status(hwif);
946                 local_irq_restore(flags);
947
948                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
949         }
950         if (put_user(progress_indication, arg))
951                 return (-EFAULT);
952
953         return (0);
954 }
955
956 static sector_t idefloppy_capacity(ide_drive_t *drive)
957 {
958         idefloppy_floppy_t *floppy = drive->driver_data;
959         unsigned long capacity = floppy->blocks * floppy->bs_factor;
960
961         return capacity;
962 }
963
964 /*
965  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
966  * results.
967  */
968 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
969 {
970         u8 gcw[2];
971         u8 device_type, protocol, removable, drq_type, packet_size;
972
973         *((u16 *) &gcw) = id->config;
974
975         device_type =  gcw[1] & 0x1F;
976         removable   = (gcw[0] & 0x80) >> 7;
977         protocol    = (gcw[1] & 0xC0) >> 6;
978         drq_type    = (gcw[0] & 0x60) >> 5;
979         packet_size =  gcw[0] & 0x03;
980
981 #ifdef CONFIG_PPC
982         /* kludge for Apple PowerBook internal zip */
983         if (device_type == 5 &&
984             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
985                 device_type = 0;
986 #endif
987
988         if (protocol != 2)
989                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
990                         protocol);
991         else if (device_type != 0)
992                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
993                                 "to floppy\n", device_type);
994         else if (!removable)
995                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
996         else if (drq_type == 3)
997                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
998                                 "supported\n", drq_type);
999         else if (packet_size != 0)
1000                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1001                                 "bytes\n", packet_size);
1002         else
1003                 return 1;
1004         return 0;
1005 }
1006
1007 #ifdef CONFIG_IDE_PROC_FS
1008 static void idefloppy_add_settings(ide_drive_t *drive)
1009 {
1010         idefloppy_floppy_t *floppy = drive->driver_data;
1011
1012         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1013                         &drive->bios_cyl, NULL);
1014         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1015                         &drive->bios_head, NULL);
1016         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1017                         &drive->bios_sect, NULL);
1018         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1019                         &floppy->ticks,  NULL);
1020 }
1021 #else
1022 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1023 #endif
1024
1025 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1026 {
1027         u8 gcw[2];
1028
1029         *((u16 *) &gcw) = drive->id->config;
1030         floppy->pc = floppy->pc_stack;
1031         drive->pc_callback = ide_floppy_callback;
1032
1033         if (((gcw[0] & 0x60) >> 5) == 1)
1034                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
1035         /*
1036          * We used to check revisions here. At this point however I'm giving up.
1037          * Just assume they are all broken, its easier.
1038          *
1039          * The actual reason for the workarounds was likely a driver bug after
1040          * all rather than a firmware bug, and the workaround below used to hide
1041          * it. It should be fixed as of version 1.9, but to be on the safe side
1042          * we'll leave the limitation below for the 2.2.x tree.
1043          */
1044         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1045                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
1046                 /* This value will be visible in the /proc/ide/hdx/settings */
1047                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1048                 blk_queue_max_sectors(drive->queue, 64);
1049         }
1050
1051         /*
1052          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1053          * nasty clicking noises without it, so please don't remove this.
1054          */
1055         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1056                 blk_queue_max_sectors(drive->queue, 64);
1057                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
1058         }
1059
1060         (void) ide_floppy_get_capacity(drive);
1061         idefloppy_add_settings(drive);
1062 }
1063
1064 static void ide_floppy_remove(ide_drive_t *drive)
1065 {
1066         idefloppy_floppy_t *floppy = drive->driver_data;
1067         struct gendisk *g = floppy->disk;
1068
1069         ide_proc_unregister_driver(drive, floppy->driver);
1070
1071         del_gendisk(g);
1072
1073         ide_floppy_put(floppy);
1074 }
1075
1076 static void idefloppy_cleanup_obj(struct kref *kref)
1077 {
1078         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1079         ide_drive_t *drive = floppy->drive;
1080         struct gendisk *g = floppy->disk;
1081
1082         drive->driver_data = NULL;
1083         g->private_data = NULL;
1084         put_disk(g);
1085         kfree(floppy);
1086 }
1087
1088 #ifdef CONFIG_IDE_PROC_FS
1089 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1090                 int count, int *eof, void *data)
1091 {
1092         ide_drive_t*drive = (ide_drive_t *)data;
1093         int len;
1094
1095         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1096         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1097 }
1098
1099 static ide_proc_entry_t idefloppy_proc[] = {
1100         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1101         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1102         { NULL, 0, NULL, NULL }
1103 };
1104 #endif  /* CONFIG_IDE_PROC_FS */
1105
1106 static int ide_floppy_probe(ide_drive_t *);
1107
1108 static ide_driver_t idefloppy_driver = {
1109         .gen_driver = {
1110                 .owner          = THIS_MODULE,
1111                 .name           = "ide-floppy",
1112                 .bus            = &ide_bus_type,
1113         },
1114         .probe                  = ide_floppy_probe,
1115         .remove                 = ide_floppy_remove,
1116         .version                = IDEFLOPPY_VERSION,
1117         .media                  = ide_floppy,
1118         .supports_dsc_overlap   = 0,
1119         .do_request             = idefloppy_do_request,
1120         .end_request            = idefloppy_end_request,
1121         .error                  = __ide_error,
1122 #ifdef CONFIG_IDE_PROC_FS
1123         .proc                   = idefloppy_proc,
1124 #endif
1125 };
1126
1127 static int idefloppy_open(struct inode *inode, struct file *filp)
1128 {
1129         struct gendisk *disk = inode->i_bdev->bd_disk;
1130         struct ide_floppy_obj *floppy;
1131         ide_drive_t *drive;
1132         struct ide_atapi_pc pc;
1133         int ret = 0;
1134
1135         debug_log("Reached %s\n", __func__);
1136
1137         floppy = ide_floppy_get(disk);
1138         if (!floppy)
1139                 return -ENXIO;
1140
1141         drive = floppy->drive;
1142
1143         floppy->openers++;
1144
1145         if (floppy->openers == 1) {
1146                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1147                 /* Just in case */
1148
1149                 idefloppy_init_pc(&pc);
1150                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1151
1152                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1153                         idefloppy_create_start_stop_cmd(&pc, 1);
1154                         (void) idefloppy_queue_pc_tail(drive, &pc);
1155                 }
1156
1157                 if (ide_floppy_get_capacity(drive)
1158                    && (filp->f_flags & O_NDELAY) == 0
1159                     /*
1160                      * Allow O_NDELAY to open a drive without a disk, or with an
1161                      * unreadable disk, so that we can get the format capacity
1162                      * of the drive or begin the format - Sam
1163                      */
1164                     ) {
1165                         ret = -EIO;
1166                         goto out_put_floppy;
1167                 }
1168
1169                 if (floppy->wp && (filp->f_mode & 2)) {
1170                         ret = -EROFS;
1171                         goto out_put_floppy;
1172                 }
1173                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1174                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1175                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1176                         idefloppy_create_prevent_cmd(&pc, 1);
1177                         (void) idefloppy_queue_pc_tail(drive, &pc);
1178                 }
1179                 check_disk_change(inode->i_bdev);
1180         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1181                 ret = -EBUSY;
1182                 goto out_put_floppy;
1183         }
1184         return 0;
1185
1186 out_put_floppy:
1187         floppy->openers--;
1188         ide_floppy_put(floppy);
1189         return ret;
1190 }
1191
1192 static int idefloppy_release(struct inode *inode, struct file *filp)
1193 {
1194         struct gendisk *disk = inode->i_bdev->bd_disk;
1195         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1196         ide_drive_t *drive = floppy->drive;
1197         struct ide_atapi_pc pc;
1198
1199         debug_log("Reached %s\n", __func__);
1200
1201         if (floppy->openers == 1) {
1202                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1203                 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1204                         idefloppy_create_prevent_cmd(&pc, 0);
1205                         (void) idefloppy_queue_pc_tail(drive, &pc);
1206                 }
1207
1208                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1209         }
1210
1211         floppy->openers--;
1212
1213         ide_floppy_put(floppy);
1214
1215         return 0;
1216 }
1217
1218 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1219 {
1220         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1221         ide_drive_t *drive = floppy->drive;
1222
1223         geo->heads = drive->bios_head;
1224         geo->sectors = drive->bios_sect;
1225         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1226         return 0;
1227 }
1228
1229 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1230                                unsigned long arg, unsigned int cmd)
1231 {
1232         idefloppy_floppy_t *floppy = drive->driver_data;
1233
1234         if (floppy->openers > 1)
1235                 return -EBUSY;
1236
1237         /* The IOMEGA Clik! Drive doesn't support this command -
1238          * no room for an eject mechanism */
1239         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) {
1240                 int prevent = arg ? 1 : 0;
1241
1242                 if (cmd == CDROMEJECT)
1243                         prevent = 0;
1244
1245                 idefloppy_create_prevent_cmd(pc, prevent);
1246                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1247         }
1248
1249         if (cmd == CDROMEJECT) {
1250                 idefloppy_create_start_stop_cmd(pc, 2);
1251                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1252         }
1253
1254         return 0;
1255 }
1256
1257 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1258                                   int __user *arg)
1259 {
1260         struct ide_atapi_pc pc;
1261         ide_drive_t *drive = floppy->drive;
1262         int blocks, length, flags, err = 0;
1263
1264         if (floppy->openers > 1) {
1265                 /* Don't format if someone is using the disk */
1266                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1267                 return -EBUSY;
1268         }
1269
1270         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1271
1272         /*
1273          * Send ATAPI_FORMAT_UNIT to the drive.
1274          *
1275          * Userland gives us the following structure:
1276          *
1277          * struct idefloppy_format_command {
1278          *        int nblocks;
1279          *        int blocksize;
1280          *        int flags;
1281          *        } ;
1282          *
1283          * flags is a bitmask, currently, the only defined flag is:
1284          *
1285          *        0x01 - verify media after format.
1286          */
1287         if (get_user(blocks, arg) ||
1288                         get_user(length, arg+1) ||
1289                         get_user(flags, arg+2)) {
1290                 err = -EFAULT;
1291                 goto out;
1292         }
1293
1294         (void) idefloppy_get_sfrp_bit(drive);
1295         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1296
1297         if (idefloppy_queue_pc_tail(drive, &pc))
1298                 err = -EIO;
1299
1300 out:
1301         if (err)
1302                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1303         return err;
1304 }
1305
1306
1307 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1308                         unsigned int cmd, unsigned long arg)
1309 {
1310         struct block_device *bdev = inode->i_bdev;
1311         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1312         ide_drive_t *drive = floppy->drive;
1313         struct ide_atapi_pc pc;
1314         void __user *argp = (void __user *)arg;
1315         int err;
1316
1317         switch (cmd) {
1318         case CDROMEJECT:
1319                 /* fall through */
1320         case CDROM_LOCKDOOR:
1321                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1322         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1323                 return 0;
1324         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1325                 return ide_floppy_get_format_capacities(drive, argp);
1326         case IDEFLOPPY_IOCTL_FORMAT_START:
1327                 if (!(file->f_mode & 2))
1328                         return -EPERM;
1329
1330                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1331         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1332                 return idefloppy_get_format_progress(drive, argp);
1333         }
1334
1335         /*
1336          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1337          * and CDROM_SEND_PACKET (legacy) ioctls
1338          */
1339         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1340                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1341                                         bdev->bd_disk, cmd, argp);
1342         else
1343                 err = -ENOTTY;
1344
1345         if (err == -ENOTTY)
1346                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1347
1348         return err;
1349 }
1350
1351 static int idefloppy_media_changed(struct gendisk *disk)
1352 {
1353         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1354         ide_drive_t *drive = floppy->drive;
1355         int ret;
1356
1357         /* do not scan partitions twice if this is a removable device */
1358         if (drive->attach) {
1359                 drive->attach = 0;
1360                 return 0;
1361         }
1362         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1363         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1364         return ret;
1365 }
1366
1367 static int idefloppy_revalidate_disk(struct gendisk *disk)
1368 {
1369         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1370         set_capacity(disk, idefloppy_capacity(floppy->drive));
1371         return 0;
1372 }
1373
1374 static struct block_device_operations idefloppy_ops = {
1375         .owner                  = THIS_MODULE,
1376         .open                   = idefloppy_open,
1377         .release                = idefloppy_release,
1378         .ioctl                  = idefloppy_ioctl,
1379         .getgeo                 = idefloppy_getgeo,
1380         .media_changed          = idefloppy_media_changed,
1381         .revalidate_disk        = idefloppy_revalidate_disk
1382 };
1383
1384 static int ide_floppy_probe(ide_drive_t *drive)
1385 {
1386         idefloppy_floppy_t *floppy;
1387         struct gendisk *g;
1388
1389         if (!strstr("ide-floppy", drive->driver_req))
1390                 goto failed;
1391         if (!drive->present)
1392                 goto failed;
1393         if (drive->media != ide_floppy)
1394                 goto failed;
1395         if (!idefloppy_identify_device(drive, drive->id)) {
1396                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1397                                 " of ide-floppy\n", drive->name);
1398                 goto failed;
1399         }
1400         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1401         if (!floppy) {
1402                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1403                                 " structure\n", drive->name);
1404                 goto failed;
1405         }
1406
1407         g = alloc_disk(1 << PARTN_BITS);
1408         if (!g)
1409                 goto out_free_floppy;
1410
1411         ide_init_disk(g, drive);
1412
1413         ide_proc_register_driver(drive, &idefloppy_driver);
1414
1415         kref_init(&floppy->kref);
1416
1417         floppy->drive = drive;
1418         floppy->driver = &idefloppy_driver;
1419         floppy->disk = g;
1420
1421         g->private_data = &floppy->driver;
1422
1423         drive->driver_data = floppy;
1424
1425         idefloppy_setup(drive, floppy);
1426
1427         g->minors = 1 << PARTN_BITS;
1428         g->driverfs_dev = &drive->gendev;
1429         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1430         g->fops = &idefloppy_ops;
1431         drive->attach = 1;
1432         add_disk(g);
1433         return 0;
1434
1435 out_free_floppy:
1436         kfree(floppy);
1437 failed:
1438         return -ENODEV;
1439 }
1440
1441 static void __exit idefloppy_exit(void)
1442 {
1443         driver_unregister(&idefloppy_driver.gen_driver);
1444 }
1445
1446 static int __init idefloppy_init(void)
1447 {
1448         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1449         return driver_register(&idefloppy_driver.gen_driver);
1450 }
1451
1452 MODULE_ALIAS("ide:*m-floppy*");
1453 module_init(idefloppy_init);
1454 module_exit(idefloppy_exit);
1455 MODULE_LICENSE("GPL");
1456 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1457