ide: add ide_queue_pc_tail() helper
[linux-2.6] / 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 DRV_NAME "ide-floppy"
19
20 #define IDEFLOPPY_VERSION "1.00"
21
22 #include <linux/module.h>
23 #include <linux/types.h>
24 #include <linux/string.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/timer.h>
28 #include <linux/mm.h>
29 #include <linux/interrupt.h>
30 #include <linux/major.h>
31 #include <linux/errno.h>
32 #include <linux/genhd.h>
33 #include <linux/slab.h>
34 #include <linux/cdrom.h>
35 #include <linux/ide.h>
36 #include <linux/hdreg.h>
37 #include <linux/bitops.h>
38 #include <linux/mutex.h>
39 #include <linux/scatterlist.h>
40
41 #include <scsi/scsi_ioctl.h>
42
43 #include <asm/byteorder.h>
44 #include <linux/irq.h>
45 #include <linux/uaccess.h>
46 #include <linux/io.h>
47 #include <asm/unaligned.h>
48
49 /* define to see debug info */
50 #define IDEFLOPPY_DEBUG_LOG             0
51
52 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
53 #define IDEFLOPPY_DEBUG(fmt, args...)
54
55 #if IDEFLOPPY_DEBUG_LOG
56 #define debug_log(fmt, args...) \
57         printk(KERN_INFO "ide-floppy: " fmt, ## args)
58 #else
59 #define debug_log(fmt, args...) do {} while (0)
60 #endif
61
62
63 /* Some drives require a longer irq timeout. */
64 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
65
66 /*
67  * After each failed packet command we issue a request sense command and retry
68  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
69  */
70 #define IDEFLOPPY_MAX_PC_RETRIES        3
71
72 /* format capacities descriptor codes */
73 #define CAPACITY_INVALID        0x00
74 #define CAPACITY_UNFORMATTED    0x01
75 #define CAPACITY_CURRENT        0x02
76 #define CAPACITY_NO_CARTRIDGE   0x03
77
78 /*
79  * Most of our global data which we need to save even as we leave the driver
80  * due to an interrupt or a timer event is stored in a variable of type
81  * idefloppy_floppy_t, defined below.
82  */
83 typedef struct ide_floppy_obj {
84         ide_drive_t     *drive;
85         ide_driver_t    *driver;
86         struct gendisk  *disk;
87         struct kref     kref;
88         unsigned int    openers;        /* protected by BKL for now */
89
90         /* Current packet command */
91         struct ide_atapi_pc *pc;
92         /* Last failed packet command */
93         struct ide_atapi_pc *failed_pc;
94         /* used for blk_{fs,pc}_request() requests */
95         struct ide_atapi_pc queued_pc;
96
97         struct ide_atapi_pc request_sense_pc;
98         struct request request_sense_rq;
99
100         /* Last error information */
101         u8 sense_key, asc, ascq;
102         /* delay this long before sending packet command */
103         u8 ticks;
104         int progress_indication;
105
106         /* Device information */
107         /* Current format */
108         int blocks, block_size, bs_factor;
109         /* Last format capacity descriptor */
110         u8 cap_desc[8];
111         /* Copy of the flexible disk page */
112         u8 flexible_disk_page[32];
113         /* Write protect */
114         int wp;
115         /* Supports format progress report */
116         int srfp;
117 } idefloppy_floppy_t;
118
119 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
120
121 /* IOCTLs used in low-level formatting. */
122 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
123 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
124 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
125 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
126
127 /* Error code returned in rq->errors to the higher part of the driver. */
128 #define IDEFLOPPY_ERROR_GENERAL         101
129
130 /*
131  * Pages of the SELECT SENSE / MODE SENSE packet commands.
132  * See SFF-8070i spec.
133  */
134 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
135 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
136
137 static DEFINE_MUTEX(idefloppy_ref_mutex);
138
139 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
140
141 #define ide_floppy_g(disk) \
142         container_of((disk)->private_data, struct ide_floppy_obj, driver)
143
144 static void idefloppy_cleanup_obj(struct kref *);
145
146 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
147 {
148         struct ide_floppy_obj *floppy = NULL;
149
150         mutex_lock(&idefloppy_ref_mutex);
151         floppy = ide_floppy_g(disk);
152         if (floppy) {
153                 if (ide_device_get(floppy->drive))
154                         floppy = NULL;
155                 else
156                         kref_get(&floppy->kref);
157         }
158         mutex_unlock(&idefloppy_ref_mutex);
159         return floppy;
160 }
161
162 static void ide_floppy_put(struct ide_floppy_obj *floppy)
163 {
164         ide_drive_t *drive = floppy->drive;
165
166         mutex_lock(&idefloppy_ref_mutex);
167         kref_put(&floppy->kref, idefloppy_cleanup_obj);
168         ide_device_put(drive);
169         mutex_unlock(&idefloppy_ref_mutex);
170 }
171
172 /*
173  * Used to finish servicing a request. For read/write requests, we will call
174  * ide_end_request to pass to the next buffer.
175  */
176 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
177 {
178         idefloppy_floppy_t *floppy = drive->driver_data;
179         struct request *rq = HWGROUP(drive)->rq;
180         int error;
181
182         debug_log("Reached %s\n", __func__);
183
184         switch (uptodate) {
185         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
186         case 1: error = 0; break;
187         default: error = uptodate;
188         }
189         if (error)
190                 floppy->failed_pc = NULL;
191         /* Why does this happen? */
192         if (!rq)
193                 return 0;
194         if (!blk_special_request(rq)) {
195                 /* our real local end request function */
196                 ide_end_request(drive, uptodate, nsecs);
197                 return 0;
198         }
199         rq->errors = error;
200         /* fixme: need to move this local also */
201         ide_end_drive_cmd(drive, 0, 0);
202         return 0;
203 }
204
205 static void idefloppy_update_buffers(ide_drive_t *drive,
206                                 struct ide_atapi_pc *pc)
207 {
208         struct request *rq = pc->rq;
209         struct bio *bio = rq->bio;
210
211         while ((bio = rq->bio) != NULL)
212                 idefloppy_end_request(drive, 1, 0);
213 }
214
215 static void ide_floppy_callback(ide_drive_t *drive)
216 {
217         idefloppy_floppy_t *floppy = drive->driver_data;
218         struct ide_atapi_pc *pc = floppy->pc;
219         int uptodate = pc->error ? 0 : 1;
220
221         debug_log("Reached %s\n", __func__);
222
223         if (floppy->failed_pc == pc)
224                 floppy->failed_pc = NULL;
225
226         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
227             (pc->rq && blk_pc_request(pc->rq)))
228                 uptodate = 1; /* FIXME */
229         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
230                 u8 *buf = floppy->pc->buf;
231
232                 if (!pc->error) {
233                         floppy->sense_key = buf[2] & 0x0F;
234                         floppy->asc = buf[12];
235                         floppy->ascq = buf[13];
236                         floppy->progress_indication = buf[15] & 0x80 ?
237                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
238
239                         if (floppy->failed_pc)
240                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
241
242                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
243                                   floppy->sense_key, floppy->asc, floppy->ascq);
244                 } else
245                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
246                                         "Aborting request!\n");
247         }
248
249         idefloppy_end_request(drive, uptodate, 0);
250 }
251
252 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
253 {
254         ide_init_pc(pc);
255         pc->c[0] = GPCMD_REQUEST_SENSE;
256         pc->c[4] = 255;
257         pc->req_xfer = 18;
258 }
259
260 /*
261  * Called when an error was detected during the last packet command. We queue a
262  * request sense packet command in the head of the request list.
263  */
264 static void idefloppy_retry_pc(ide_drive_t *drive)
265 {
266         struct ide_floppy_obj *floppy = drive->driver_data;
267         struct request *rq = &floppy->request_sense_rq;
268         struct ide_atapi_pc *pc = &floppy->request_sense_pc;
269
270         (void)ide_read_error(drive);
271         idefloppy_create_request_sense_cmd(pc);
272         ide_queue_pc_head(drive, floppy->disk, pc, rq);
273 }
274
275 /* The usual interrupt handler called during a packet command. */
276 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
277 {
278         idefloppy_floppy_t *floppy = drive->driver_data;
279
280         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
281                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
282                            idefloppy_retry_pc, NULL, ide_io_buffers);
283 }
284
285 /*
286  * What we have here is a classic case of a top half / bottom half interrupt
287  * service routine. In interrupt mode, the device sends an interrupt to signal
288  * that it is ready to receive a packet. However, we need to delay about 2-3
289  * ticks before issuing the packet or we gets in trouble.
290  */
291 static int idefloppy_transfer_pc(ide_drive_t *drive)
292 {
293         idefloppy_floppy_t *floppy = drive->driver_data;
294
295         /* Send the actual packet */
296         drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12);
297
298         /* Timeout for the packet command */
299         return IDEFLOPPY_WAIT_CMD;
300 }
301
302
303 /*
304  * Called as an interrupt (or directly). When the device says it's ready for a
305  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
306  * transfer_pc.
307  */
308 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
309 {
310         idefloppy_floppy_t *floppy = drive->driver_data;
311         struct ide_atapi_pc *pc = floppy->pc;
312         ide_expiry_t *expiry;
313         unsigned int timeout;
314
315         /*
316          * The following delay solves a problem with ATAPI Zip 100 drives
317          * where the Busy flag was apparently being deasserted before the
318          * unit was ready to receive data. This was happening on a
319          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
320          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
321          * used until after the packet is moved in about 50 msec.
322          */
323         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
324                 timeout = floppy->ticks;
325                 expiry = &idefloppy_transfer_pc;
326         } else {
327                 timeout = IDEFLOPPY_WAIT_CMD;
328                 expiry = NULL;
329         }
330
331         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
332 }
333
334 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
335                                     struct ide_atapi_pc *pc)
336 {
337         /* supress error messages resulting from Medium not present */
338         if (floppy->sense_key == 0x02 &&
339             floppy->asc       == 0x3a &&
340             floppy->ascq      == 0x00)
341                 return;
342
343         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
344                         "asc = %2x, ascq = %2x\n",
345                         floppy->drive->name, pc->c[0], floppy->sense_key,
346                         floppy->asc, floppy->ascq);
347
348 }
349
350 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
351                 struct ide_atapi_pc *pc)
352 {
353         idefloppy_floppy_t *floppy = drive->driver_data;
354
355         if (floppy->failed_pc == NULL &&
356             pc->c[0] != GPCMD_REQUEST_SENSE)
357                 floppy->failed_pc = pc;
358         /* Set the current packet command */
359         floppy->pc = pc;
360
361         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
362                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
363                         ide_floppy_report_error(floppy, pc);
364                 /* Giving up */
365                 pc->error = IDEFLOPPY_ERROR_GENERAL;
366
367                 floppy->failed_pc = NULL;
368                 drive->pc_callback(drive);
369                 return ide_stopped;
370         }
371
372         debug_log("Retry number - %d\n", pc->retries);
373
374         pc->retries++;
375
376         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
377                             IDEFLOPPY_WAIT_CMD, NULL);
378 }
379
380 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
381 {
382         debug_log("creating prevent removal command, prevent = %d\n", prevent);
383
384         ide_init_pc(pc);
385         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
386         pc->c[4] = prevent;
387 }
388
389 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
390 {
391         ide_init_pc(pc);
392         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
393         pc->c[7] = 255;
394         pc->c[8] = 255;
395         pc->req_xfer = 255;
396 }
397
398 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
399                 int l, int flags)
400 {
401         ide_init_pc(pc);
402         pc->c[0] = GPCMD_FORMAT_UNIT;
403         pc->c[1] = 0x17;
404
405         memset(pc->buf, 0, 12);
406         pc->buf[1] = 0xA2;
407         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
408
409         if (flags & 1)                          /* Verify bit on... */
410                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
411         pc->buf[3] = 8;
412
413         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
414         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
415         pc->buf_size = 12;
416         pc->flags |= PC_FLAG_WRITING;
417 }
418
419 /* A mode sense command is used to "sense" floppy parameters. */
420 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
421                                             u8 page_code)
422 {
423         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
424
425         ide_init_pc(pc);
426         pc->c[0] = GPCMD_MODE_SENSE_10;
427         pc->c[1] = 0;
428         pc->c[2] = page_code;
429
430         switch (page_code) {
431         case IDEFLOPPY_CAPABILITIES_PAGE:
432                 length += 12;
433                 break;
434         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
435                 length += 32;
436                 break;
437         default:
438                 printk(KERN_ERR "ide-floppy: unsupported page code "
439                                 "in create_mode_sense_cmd\n");
440         }
441         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
442         pc->req_xfer = length;
443 }
444
445 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
446 {
447         ide_init_pc(pc);
448         pc->c[0] = GPCMD_START_STOP_UNIT;
449         pc->c[4] = start;
450 }
451
452 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
453                                     struct ide_atapi_pc *pc, struct request *rq,
454                                     unsigned long sector)
455 {
456         int block = sector / floppy->bs_factor;
457         int blocks = rq->nr_sectors / floppy->bs_factor;
458         int cmd = rq_data_dir(rq);
459
460         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
461                 block, blocks);
462
463         ide_init_pc(pc);
464         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
465         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
466         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
467
468         memcpy(rq->cmd, pc->c, 12);
469
470         pc->rq = rq;
471         pc->b_count = 0;
472         if (rq->cmd_flags & REQ_RW)
473                 pc->flags |= PC_FLAG_WRITING;
474         pc->buf = NULL;
475         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
476         pc->flags |= PC_FLAG_DMA_OK;
477 }
478
479 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
480                 struct ide_atapi_pc *pc, struct request *rq)
481 {
482         ide_init_pc(pc);
483         memcpy(pc->c, rq->cmd, sizeof(pc->c));
484         pc->rq = rq;
485         pc->b_count = 0;
486         if (rq->data_len && rq_data_dir(rq) == WRITE)
487                 pc->flags |= PC_FLAG_WRITING;
488         pc->buf = rq->data;
489         if (rq->bio)
490                 pc->flags |= PC_FLAG_DMA_OK;
491         /*
492          * possibly problematic, doesn't look like ide-floppy correctly
493          * handled scattered requests if dma fails...
494          */
495         pc->req_xfer = pc->buf_size = rq->data_len;
496 }
497
498 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
499                 struct request *rq, sector_t block_s)
500 {
501         idefloppy_floppy_t *floppy = drive->driver_data;
502         ide_hwif_t *hwif = drive->hwif;
503         struct ide_atapi_pc *pc;
504         unsigned long block = (unsigned long)block_s;
505
506         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
507                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
508                   rq->cmd[0], rq->cmd_type, rq->errors);
509
510         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
511                   __func__, (long)rq->sector, rq->nr_sectors,
512                   rq->current_nr_sectors);
513
514         if (rq->errors >= ERROR_MAX) {
515                 if (floppy->failed_pc)
516                         ide_floppy_report_error(floppy, floppy->failed_pc);
517                 else
518                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
519                                 drive->name);
520                 idefloppy_end_request(drive, 0, 0);
521                 return ide_stopped;
522         }
523         if (blk_fs_request(rq)) {
524                 if (((long)rq->sector % floppy->bs_factor) ||
525                     (rq->nr_sectors % floppy->bs_factor)) {
526                         printk(KERN_ERR "%s: unsupported r/w request size\n",
527                                         drive->name);
528                         idefloppy_end_request(drive, 0, 0);
529                         return ide_stopped;
530                 }
531                 pc = &floppy->queued_pc;
532                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
533         } else if (blk_special_request(rq)) {
534                 pc = (struct ide_atapi_pc *) rq->buffer;
535         } else if (blk_pc_request(rq)) {
536                 pc = &floppy->queued_pc;
537                 idefloppy_blockpc_cmd(floppy, pc, rq);
538         } else {
539                 blk_dump_rq_flags(rq,
540                         "ide-floppy: unsupported command in queue");
541                 idefloppy_end_request(drive, 0, 0);
542                 return ide_stopped;
543         }
544
545         ide_init_sg_cmd(drive, rq);
546         ide_map_sg(drive, rq);
547
548         pc->sg = hwif->sg_table;
549         pc->sg_cnt = hwif->sg_nents;
550
551         pc->rq = rq;
552
553         return idefloppy_issue_pc(drive, pc);
554 }
555
556 /*
557  * Look at the flexible disk page parameters. We ignore the CHS capacity
558  * parameters and use the LBA parameters instead.
559  */
560 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
561 {
562         idefloppy_floppy_t *floppy = drive->driver_data;
563         struct gendisk *disk = floppy->disk;
564         struct ide_atapi_pc pc;
565         u8 *page;
566         int capacity, lba_capacity;
567         u16 transfer_rate, sector_size, cyls, rpm;
568         u8 heads, sectors;
569
570         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
571
572         if (ide_queue_pc_tail(drive, disk, &pc)) {
573                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
574                                 " parameters\n");
575                 return 1;
576         }
577         floppy->wp = !!(pc.buf[3] & 0x80);
578         set_disk_ro(disk, floppy->wp);
579         page = &pc.buf[8];
580
581         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
582         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
583         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
584         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
585         heads         = pc.buf[8 + 4];
586         sectors       = pc.buf[8 + 5];
587
588         capacity = cyls * heads * sectors * sector_size;
589
590         if (memcmp(page, &floppy->flexible_disk_page, 32))
591                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
592                                 "%d sector size, %d rpm\n",
593                                 drive->name, capacity / 1024, cyls, heads,
594                                 sectors, transfer_rate / 8, sector_size, rpm);
595
596         memcpy(&floppy->flexible_disk_page, page, 32);
597         drive->bios_cyl = cyls;
598         drive->bios_head = heads;
599         drive->bios_sect = sectors;
600         lba_capacity = floppy->blocks * floppy->block_size;
601
602         if (capacity < lba_capacity) {
603                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
604                         "bytes, but the drive only handles %d\n",
605                         drive->name, lba_capacity, capacity);
606                 floppy->blocks = floppy->block_size ?
607                         capacity / floppy->block_size : 0;
608         }
609         return 0;
610 }
611
612 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
613 {
614         idefloppy_floppy_t *floppy = drive->driver_data;
615         struct ide_atapi_pc pc;
616
617         floppy->srfp = 0;
618
619         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE);
620         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
621
622         if (ide_queue_pc_tail(drive, floppy->disk, &pc))
623                 return 1;
624
625         floppy->srfp = pc.buf[8 + 2] & 0x40;
626         return 0;
627 }
628
629 /*
630  * Determine if a media is present in the floppy drive, and if so, its LBA
631  * capacity.
632  */
633 static int ide_floppy_get_capacity(ide_drive_t *drive)
634 {
635         idefloppy_floppy_t *floppy = drive->driver_data;
636         struct gendisk *disk = floppy->disk;
637         struct ide_atapi_pc pc;
638         u8 *cap_desc;
639         u8 header_len, desc_cnt;
640         int i, rc = 1, blocks, length;
641
642         drive->bios_cyl = 0;
643         drive->bios_head = drive->bios_sect = 0;
644         floppy->blocks = 0;
645         floppy->bs_factor = 1;
646         set_capacity(floppy->disk, 0);
647
648         idefloppy_create_read_capacity_cmd(&pc);
649         if (ide_queue_pc_tail(drive, disk, &pc)) {
650                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
651                 return 1;
652         }
653         header_len = pc.buf[3];
654         cap_desc = &pc.buf[4];
655         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
656
657         for (i = 0; i < desc_cnt; i++) {
658                 unsigned int desc_start = 4 + i*8;
659
660                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
661                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
662
663                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
664                                 i, blocks * length / 1024, blocks, length);
665
666                 if (i)
667                         continue;
668                 /*
669                  * the code below is valid only for the 1st descriptor, ie i=0
670                  */
671
672                 switch (pc.buf[desc_start + 4] & 0x03) {
673                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
674                 case CAPACITY_UNFORMATTED:
675                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
676                                 /*
677                                  * If it is not a clik drive, break out
678                                  * (maintains previous driver behaviour)
679                                  */
680                                 break;
681                 case CAPACITY_CURRENT:
682                         /* Normal Zip/LS-120 disks */
683                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
684                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
685                                         "sector size\n", drive->name,
686                                         blocks * length / 1024, blocks, length);
687                         memcpy(&floppy->cap_desc, cap_desc, 8);
688
689                         if (!length || length % 512) {
690                                 printk(KERN_NOTICE "%s: %d bytes block size "
691                                         "not supported\n", drive->name, length);
692                         } else {
693                                 floppy->blocks = blocks;
694                                 floppy->block_size = length;
695                                 floppy->bs_factor = length / 512;
696                                 if (floppy->bs_factor != 1)
697                                         printk(KERN_NOTICE "%s: warning: non "
698                                                 "512 bytes block size not "
699                                                 "fully supported\n",
700                                                 drive->name);
701                                 rc = 0;
702                         }
703                         break;
704                 case CAPACITY_NO_CARTRIDGE:
705                         /*
706                          * This is a KERN_ERR so it appears on screen
707                          * for the user to see
708                          */
709                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
710                         break;
711                 case CAPACITY_INVALID:
712                         printk(KERN_ERR "%s: Invalid capacity for disk "
713                                 "in drive\n", drive->name);
714                         break;
715                 }
716                 debug_log("Descriptor 0 Code: %d\n",
717                           pc.buf[desc_start + 4] & 0x03);
718         }
719
720         /* Clik! disk does not support get_flexible_disk_page */
721         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
722                 (void) ide_floppy_get_flexible_disk_page(drive);
723
724         set_capacity(disk, floppy->blocks * floppy->bs_factor);
725
726         return rc;
727 }
728
729 /*
730  * Obtain the list of formattable capacities.
731  * Very similar to ide_floppy_get_capacity, except that we push the capacity
732  * descriptors to userland, instead of our own structures.
733  *
734  * Userland gives us the following structure:
735  *
736  * struct idefloppy_format_capacities {
737  *      int nformats;
738  *      struct {
739  *              int nblocks;
740  *              int blocksize;
741  *      } formats[];
742  * };
743  *
744  * userland initializes nformats to the number of allocated formats[] records.
745  * On exit we set nformats to the number of records we've actually initialized.
746  */
747
748 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
749 {
750         struct ide_floppy_obj *floppy = drive->driver_data;
751         struct ide_atapi_pc pc;
752         u8 header_len, desc_cnt;
753         int i, blocks, length, u_array_size, u_index;
754         int __user *argp;
755
756         if (get_user(u_array_size, arg))
757                 return -EFAULT;
758
759         if (u_array_size <= 0)
760                 return -EINVAL;
761
762         idefloppy_create_read_capacity_cmd(&pc);
763         if (ide_queue_pc_tail(drive, floppy->disk, &pc)) {
764                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
765                 return -EIO;
766         }
767
768         header_len = pc.buf[3];
769         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
770
771         u_index = 0;
772         argp = arg + 1;
773
774         /*
775          * We always skip the first capacity descriptor.  That's the current
776          * capacity.  We are interested in the remaining descriptors, the
777          * formattable capacities.
778          */
779         for (i = 1; i < desc_cnt; i++) {
780                 unsigned int desc_start = 4 + i*8;
781
782                 if (u_index >= u_array_size)
783                         break;  /* User-supplied buffer too small */
784
785                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
786                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
787
788                 if (put_user(blocks, argp))
789                         return -EFAULT;
790
791                 ++argp;
792
793                 if (put_user(length, argp))
794                         return -EFAULT;
795
796                 ++argp;
797
798                 ++u_index;
799         }
800
801         if (put_user(u_index, arg))
802                 return -EFAULT;
803
804         return 0;
805 }
806
807 /*
808  * Get ATAPI_FORMAT_UNIT progress indication.
809  *
810  * Userland gives a pointer to an int.  The int is set to a progress
811  * indicator 0-65536, with 65536=100%.
812  *
813  * If the drive does not support format progress indication, we just check
814  * the dsc bit, and return either 0 or 65536.
815  */
816
817 static int ide_floppy_get_format_progress(ide_drive_t *drive, int __user *arg)
818 {
819         idefloppy_floppy_t *floppy = drive->driver_data;
820         struct ide_atapi_pc pc;
821         int progress_indication = 0x10000;
822
823         if (floppy->srfp) {
824                 idefloppy_create_request_sense_cmd(&pc);
825                 if (ide_queue_pc_tail(drive, floppy->disk, &pc))
826                         return -EIO;
827
828                 if (floppy->sense_key == 2 &&
829                     floppy->asc == 4 &&
830                     floppy->ascq == 4)
831                         progress_indication = floppy->progress_indication;
832
833                 /* Else assume format_unit has finished, and we're at 0x10000 */
834         } else {
835                 ide_hwif_t *hwif = drive->hwif;
836                 unsigned long flags;
837                 u8 stat;
838
839                 local_irq_save(flags);
840                 stat = hwif->tp_ops->read_status(hwif);
841                 local_irq_restore(flags);
842
843                 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000;
844         }
845
846         if (put_user(progress_indication, arg))
847                 return -EFAULT;
848
849         return 0;
850 }
851
852 static sector_t idefloppy_capacity(ide_drive_t *drive)
853 {
854         idefloppy_floppy_t *floppy = drive->driver_data;
855         unsigned long capacity = floppy->blocks * floppy->bs_factor;
856
857         return capacity;
858 }
859
860 #ifdef CONFIG_IDE_PROC_FS
861 ide_devset_rw(bios_cyl,  0, 1023, bios_cyl);
862 ide_devset_rw(bios_head, 0,  255, bios_head);
863 ide_devset_rw(bios_sect, 0,   63, bios_sect);
864
865 static int get_ticks(ide_drive_t *drive)
866 {
867         idefloppy_floppy_t *floppy = drive->driver_data;
868         return floppy->ticks;
869 }
870
871 static int set_ticks(ide_drive_t *drive, int arg)
872 {
873         idefloppy_floppy_t *floppy = drive->driver_data;
874         floppy->ticks = arg;
875         return 0;
876 }
877
878 IDE_DEVSET(ticks, S_RW, 0, 255, get_ticks, set_ticks);
879
880 static const struct ide_devset *idefloppy_settings[] = {
881         &ide_devset_bios_cyl,
882         &ide_devset_bios_head,
883         &ide_devset_bios_sect,
884         &ide_devset_ticks,
885         NULL
886 };
887 #endif
888
889 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
890 {
891         u16 *id = drive->id;
892         u8 gcw[2];
893
894         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
895
896         drive->pc_callback = ide_floppy_callback;
897
898         if (((gcw[0] & 0x60) >> 5) == 1)
899                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
900         /*
901          * We used to check revisions here. At this point however I'm giving up.
902          * Just assume they are all broken, its easier.
903          *
904          * The actual reason for the workarounds was likely a driver bug after
905          * all rather than a firmware bug, and the workaround below used to hide
906          * it. It should be fixed as of version 1.9, but to be on the safe side
907          * we'll leave the limitation below for the 2.2.x tree.
908          */
909         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
910                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
911                 /* This value will be visible in the /proc/ide/hdx/settings */
912                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
913                 blk_queue_max_sectors(drive->queue, 64);
914         }
915
916         /*
917          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
918          * nasty clicking noises without it, so please don't remove this.
919          */
920         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
921                 blk_queue_max_sectors(drive->queue, 64);
922                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
923         }
924
925         (void) ide_floppy_get_capacity(drive);
926
927         ide_proc_register_driver(drive, floppy->driver);
928 }
929
930 static void ide_floppy_remove(ide_drive_t *drive)
931 {
932         idefloppy_floppy_t *floppy = drive->driver_data;
933         struct gendisk *g = floppy->disk;
934
935         ide_proc_unregister_driver(drive, floppy->driver);
936
937         del_gendisk(g);
938
939         ide_floppy_put(floppy);
940 }
941
942 static void idefloppy_cleanup_obj(struct kref *kref)
943 {
944         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
945         ide_drive_t *drive = floppy->drive;
946         struct gendisk *g = floppy->disk;
947
948         drive->driver_data = NULL;
949         g->private_data = NULL;
950         put_disk(g);
951         kfree(floppy);
952 }
953
954 #ifdef CONFIG_IDE_PROC_FS
955 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
956                 int count, int *eof, void *data)
957 {
958         ide_drive_t*drive = (ide_drive_t *)data;
959         int len;
960
961         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
962         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
963 }
964
965 static ide_proc_entry_t idefloppy_proc[] = {
966         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
967         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
968         { NULL, 0, NULL, NULL }
969 };
970 #endif  /* CONFIG_IDE_PROC_FS */
971
972 static int ide_floppy_probe(ide_drive_t *);
973
974 static ide_driver_t idefloppy_driver = {
975         .gen_driver = {
976                 .owner          = THIS_MODULE,
977                 .name           = "ide-floppy",
978                 .bus            = &ide_bus_type,
979         },
980         .probe                  = ide_floppy_probe,
981         .remove                 = ide_floppy_remove,
982         .version                = IDEFLOPPY_VERSION,
983         .media                  = ide_floppy,
984         .do_request             = idefloppy_do_request,
985         .end_request            = idefloppy_end_request,
986         .error                  = __ide_error,
987 #ifdef CONFIG_IDE_PROC_FS
988         .proc                   = idefloppy_proc,
989         .settings               = idefloppy_settings,
990 #endif
991 };
992
993 static void ide_floppy_set_media_lock(ide_drive_t *drive, int on)
994 {
995         struct ide_floppy_obj *floppy = drive->driver_data;
996         struct ide_atapi_pc pc;
997
998         /* IOMEGA Clik! drives do not support lock/unlock commands */
999         if ((drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE) == 0) {
1000                 idefloppy_create_prevent_cmd(&pc, on);
1001                 (void)ide_queue_pc_tail(drive, floppy->disk, &pc);
1002         }
1003 }
1004
1005 static int idefloppy_open(struct inode *inode, struct file *filp)
1006 {
1007         struct gendisk *disk = inode->i_bdev->bd_disk;
1008         struct ide_floppy_obj *floppy;
1009         ide_drive_t *drive;
1010         struct ide_atapi_pc pc;
1011         int ret = 0;
1012
1013         debug_log("Reached %s\n", __func__);
1014
1015         floppy = ide_floppy_get(disk);
1016         if (!floppy)
1017                 return -ENXIO;
1018
1019         drive = floppy->drive;
1020
1021         floppy->openers++;
1022
1023         if (floppy->openers == 1) {
1024                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1025                 /* Just in case */
1026
1027                 ide_init_pc(&pc);
1028                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1029
1030                 if (ide_queue_pc_tail(drive, disk, &pc)) {
1031                         idefloppy_create_start_stop_cmd(&pc, 1);
1032                         (void)ide_queue_pc_tail(drive, disk, &pc);
1033                 }
1034
1035                 if (ide_floppy_get_capacity(drive)
1036                    && (filp->f_flags & O_NDELAY) == 0
1037                     /*
1038                      * Allow O_NDELAY to open a drive without a disk, or with an
1039                      * unreadable disk, so that we can get the format capacity
1040                      * of the drive or begin the format - Sam
1041                      */
1042                     ) {
1043                         ret = -EIO;
1044                         goto out_put_floppy;
1045                 }
1046
1047                 if (floppy->wp && (filp->f_mode & 2)) {
1048                         ret = -EROFS;
1049                         goto out_put_floppy;
1050                 }
1051
1052                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
1053                 ide_floppy_set_media_lock(drive, 1);
1054                 check_disk_change(inode->i_bdev);
1055         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
1056                 ret = -EBUSY;
1057                 goto out_put_floppy;
1058         }
1059         return 0;
1060
1061 out_put_floppy:
1062         floppy->openers--;
1063         ide_floppy_put(floppy);
1064         return ret;
1065 }
1066
1067 static int idefloppy_release(struct inode *inode, struct file *filp)
1068 {
1069         struct gendisk *disk = inode->i_bdev->bd_disk;
1070         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1071         ide_drive_t *drive = floppy->drive;
1072
1073         debug_log("Reached %s\n", __func__);
1074
1075         if (floppy->openers == 1) {
1076                 ide_floppy_set_media_lock(drive, 0);
1077                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1078         }
1079
1080         floppy->openers--;
1081
1082         ide_floppy_put(floppy);
1083
1084         return 0;
1085 }
1086
1087 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1088 {
1089         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1090         ide_drive_t *drive = floppy->drive;
1091
1092         geo->heads = drive->bios_head;
1093         geo->sectors = drive->bios_sect;
1094         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1095         return 0;
1096 }
1097
1098 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
1099                                unsigned long arg, unsigned int cmd)
1100 {
1101         idefloppy_floppy_t *floppy = drive->driver_data;
1102         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
1103
1104         if (floppy->openers > 1)
1105                 return -EBUSY;
1106
1107         ide_floppy_set_media_lock(drive, prevent);
1108
1109         if (cmd == CDROMEJECT) {
1110                 idefloppy_create_start_stop_cmd(pc, 2);
1111                 (void)ide_queue_pc_tail(drive, floppy->disk, pc);
1112         }
1113
1114         return 0;
1115 }
1116
1117 static int ide_floppy_format_unit(ide_drive_t *drive, int __user *arg)
1118 {
1119         idefloppy_floppy_t *floppy = drive->driver_data;
1120         struct ide_atapi_pc pc;
1121         int blocks, length, flags, err = 0;
1122
1123         if (floppy->openers > 1) {
1124                 /* Don't format if someone is using the disk */
1125                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1126                 return -EBUSY;
1127         }
1128
1129         drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS;
1130
1131         /*
1132          * Send ATAPI_FORMAT_UNIT to the drive.
1133          *
1134          * Userland gives us the following structure:
1135          *
1136          * struct idefloppy_format_command {
1137          *        int nblocks;
1138          *        int blocksize;
1139          *        int flags;
1140          *        } ;
1141          *
1142          * flags is a bitmask, currently, the only defined flag is:
1143          *
1144          *        0x01 - verify media after format.
1145          */
1146         if (get_user(blocks, arg) ||
1147                         get_user(length, arg+1) ||
1148                         get_user(flags, arg+2)) {
1149                 err = -EFAULT;
1150                 goto out;
1151         }
1152
1153         (void) idefloppy_get_sfrp_bit(drive);
1154         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1155
1156         if (ide_queue_pc_tail(drive, floppy->disk, &pc))
1157                 err = -EIO;
1158
1159 out:
1160         if (err)
1161                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
1162         return err;
1163 }
1164
1165 static int ide_floppy_format_ioctl(ide_drive_t *drive, struct file *file,
1166                                    unsigned int cmd, void __user *argp)
1167 {
1168         switch (cmd) {
1169         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1170                 return 0;
1171         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1172                 return ide_floppy_get_format_capacities(drive, argp);
1173         case IDEFLOPPY_IOCTL_FORMAT_START:
1174                 if (!(file->f_mode & 2))
1175                         return -EPERM;
1176                 return ide_floppy_format_unit(drive, (int __user *)argp);
1177         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1178                 return ide_floppy_get_format_progress(drive, argp);
1179         default:
1180                 return -ENOTTY;
1181         }
1182 }
1183
1184 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1185                         unsigned int cmd, unsigned long arg)
1186 {
1187         struct block_device *bdev = inode->i_bdev;
1188         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1189         ide_drive_t *drive = floppy->drive;
1190         struct ide_atapi_pc pc;
1191         void __user *argp = (void __user *)arg;
1192         int err;
1193
1194         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
1195                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
1196
1197         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
1198         if (err != -ENOTTY)
1199                 return err;
1200
1201         /*
1202          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1203          * and CDROM_SEND_PACKET (legacy) ioctls
1204          */
1205         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1206                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1207                                         bdev->bd_disk, cmd, argp);
1208
1209         if (err == -ENOTTY)
1210                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1211
1212         return err;
1213 }
1214
1215 static int idefloppy_media_changed(struct gendisk *disk)
1216 {
1217         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1218         ide_drive_t *drive = floppy->drive;
1219         int ret;
1220
1221         /* do not scan partitions twice if this is a removable device */
1222         if (drive->attach) {
1223                 drive->attach = 0;
1224                 return 0;
1225         }
1226         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
1227         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
1228         return ret;
1229 }
1230
1231 static int idefloppy_revalidate_disk(struct gendisk *disk)
1232 {
1233         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1234         set_capacity(disk, idefloppy_capacity(floppy->drive));
1235         return 0;
1236 }
1237
1238 static struct block_device_operations idefloppy_ops = {
1239         .owner                  = THIS_MODULE,
1240         .open                   = idefloppy_open,
1241         .release                = idefloppy_release,
1242         .ioctl                  = idefloppy_ioctl,
1243         .getgeo                 = idefloppy_getgeo,
1244         .media_changed          = idefloppy_media_changed,
1245         .revalidate_disk        = idefloppy_revalidate_disk
1246 };
1247
1248 static int ide_floppy_probe(ide_drive_t *drive)
1249 {
1250         idefloppy_floppy_t *floppy;
1251         struct gendisk *g;
1252
1253         if (!strstr("ide-floppy", drive->driver_req))
1254                 goto failed;
1255
1256         if (drive->media != ide_floppy)
1257                 goto failed;
1258
1259         if (!ide_check_atapi_device(drive, DRV_NAME)) {
1260                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1261                                 " of ide-floppy\n", drive->name);
1262                 goto failed;
1263         }
1264         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1265         if (!floppy) {
1266                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1267                                 " structure\n", drive->name);
1268                 goto failed;
1269         }
1270
1271         g = alloc_disk(1 << PARTN_BITS);
1272         if (!g)
1273                 goto out_free_floppy;
1274
1275         ide_init_disk(g, drive);
1276
1277         kref_init(&floppy->kref);
1278
1279         floppy->drive = drive;
1280         floppy->driver = &idefloppy_driver;
1281         floppy->disk = g;
1282
1283         g->private_data = &floppy->driver;
1284
1285         drive->driver_data = floppy;
1286
1287         idefloppy_setup(drive, floppy);
1288
1289         g->minors = 1 << PARTN_BITS;
1290         g->driverfs_dev = &drive->gendev;
1291         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1292         g->fops = &idefloppy_ops;
1293         drive->attach = 1;
1294         add_disk(g);
1295         return 0;
1296
1297 out_free_floppy:
1298         kfree(floppy);
1299 failed:
1300         return -ENODEV;
1301 }
1302
1303 static void __exit idefloppy_exit(void)
1304 {
1305         driver_unregister(&idefloppy_driver.gen_driver);
1306 }
1307
1308 static int __init idefloppy_init(void)
1309 {
1310         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1311         return driver_register(&idefloppy_driver.gen_driver);
1312 }
1313
1314 MODULE_ALIAS("ide:*m-floppy*");
1315 module_init(idefloppy_init);
1316 module_exit(idefloppy_exit);
1317 MODULE_LICENSE("GPL");
1318 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1319