Merge branch 'linus' into x86/step
[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 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         /* Status/Action flags */
129         unsigned long flags;
130 } idefloppy_floppy_t;
131
132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
133
134 /* Floppy flag bits values. */
135 enum {
136         /* DRQ interrupt device */
137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
138         /* Media may have changed */
139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
140         /* Format in progress */
141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
142         /* Avoid commands not supported in Clik drive */
143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
144         /* Requires BH algorithm for packets */
145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
146 };
147
148 /* Defines for the MODE SENSE command */
149 #define MODE_SENSE_CURRENT              0x00
150 #define MODE_SENSE_CHANGEABLE           0x01
151 #define MODE_SENSE_DEFAULT              0x02
152 #define MODE_SENSE_SAVED                0x03
153
154 /* IOCTLs used in low-level formatting. */
155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
159
160 /* Error code returned in rq->errors to the higher part of the driver. */
161 #define IDEFLOPPY_ERROR_GENERAL         101
162
163 /*
164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
165  * See SFF-8070i spec.
166  */
167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
169
170 static DEFINE_MUTEX(idefloppy_ref_mutex);
171
172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
173
174 #define ide_floppy_g(disk) \
175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
176
177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
178 {
179         struct ide_floppy_obj *floppy = NULL;
180
181         mutex_lock(&idefloppy_ref_mutex);
182         floppy = ide_floppy_g(disk);
183         if (floppy)
184                 kref_get(&floppy->kref);
185         mutex_unlock(&idefloppy_ref_mutex);
186         return floppy;
187 }
188
189 static void idefloppy_cleanup_obj(struct kref *);
190
191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
192 {
193         mutex_lock(&idefloppy_ref_mutex);
194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
195         mutex_unlock(&idefloppy_ref_mutex);
196 }
197
198 /*
199  * Used to finish servicing a request. For read/write requests, we will call
200  * ide_end_request to pass to the next buffer.
201  */
202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
203 {
204         idefloppy_floppy_t *floppy = drive->driver_data;
205         struct request *rq = HWGROUP(drive)->rq;
206         int error;
207
208         debug_log("Reached %s\n", __func__);
209
210         switch (uptodate) {
211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
212         case 1: error = 0; break;
213         default: error = uptodate;
214         }
215         if (error)
216                 floppy->failed_pc = NULL;
217         /* Why does this happen? */
218         if (!rq)
219                 return 0;
220         if (!blk_special_request(rq)) {
221                 /* our real local end request function */
222                 ide_end_request(drive, uptodate, nsecs);
223                 return 0;
224         }
225         rq->errors = error;
226         /* fixme: need to move this local also */
227         ide_end_drive_cmd(drive, 0, 0);
228         return 0;
229 }
230
231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
232                                   unsigned int bcount, int direction)
233 {
234         ide_hwif_t *hwif = drive->hwif;
235         struct request *rq = pc->rq;
236         struct req_iterator iter;
237         struct bio_vec *bvec;
238         unsigned long flags;
239         int count, done = 0;
240         char *data;
241
242         rq_for_each_segment(bvec, rq, iter) {
243                 if (!bcount)
244                         break;
245
246                 count = min(bvec->bv_len, bcount);
247
248                 data = bvec_kmap_irq(bvec, &flags);
249                 if (direction)
250                         hwif->output_data(drive, NULL, data, count);
251                 else
252                         hwif->input_data(drive, NULL, data, count);
253                 bvec_kunmap_irq(data, &flags);
254
255                 bcount -= count;
256                 pc->b_count += count;
257                 done += count;
258         }
259
260         idefloppy_end_request(drive, 1, done >> 9);
261
262         if (bcount) {
263                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
264                                 drive->name, __func__, bcount);
265                 ide_pad_transfer(drive, direction, bcount);
266         }
267 }
268
269 static void idefloppy_update_buffers(ide_drive_t *drive,
270                                 struct ide_atapi_pc *pc)
271 {
272         struct request *rq = pc->rq;
273         struct bio *bio = rq->bio;
274
275         while ((bio = rq->bio) != NULL)
276                 idefloppy_end_request(drive, 1, 0);
277 }
278
279 /*
280  * Generate a new packet command request in front of the request queue, before
281  * the current request so that it will be processed immediately, on the next
282  * pass through the driver.
283  */
284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
285                 struct request *rq)
286 {
287         struct ide_floppy_obj *floppy = drive->driver_data;
288
289         blk_rq_init(NULL, rq);
290         rq->buffer = (char *) pc;
291         rq->cmd_type = REQ_TYPE_SPECIAL;
292         rq->cmd_flags |= REQ_PREEMPT;
293         rq->rq_disk = floppy->disk;
294         ide_do_drive_cmd(drive, rq);
295 }
296
297 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
298 {
299         idefloppy_floppy_t *floppy = drive->driver_data;
300
301         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
302                 floppy->pc_stack_index = 0;
303         return (&floppy->pc_stack[floppy->pc_stack_index++]);
304 }
305
306 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
307 {
308         idefloppy_floppy_t *floppy = drive->driver_data;
309
310         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
311                 floppy->rq_stack_index = 0;
312         return (&floppy->rq_stack[floppy->rq_stack_index++]);
313 }
314
315 static void ide_floppy_callback(ide_drive_t *drive)
316 {
317         idefloppy_floppy_t *floppy = drive->driver_data;
318         struct ide_atapi_pc *pc = floppy->pc;
319         int uptodate = pc->error ? 0 : 1;
320
321         debug_log("Reached %s\n", __func__);
322
323         if (floppy->failed_pc == pc)
324                 floppy->failed_pc = NULL;
325
326         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
327             (pc->rq && blk_pc_request(pc->rq)))
328                 uptodate = 1; /* FIXME */
329         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
330                 u8 *buf = floppy->pc->buf;
331
332                 if (!pc->error) {
333                         floppy->sense_key = buf[2] & 0x0F;
334                         floppy->asc = buf[12];
335                         floppy->ascq = buf[13];
336                         floppy->progress_indication = buf[15] & 0x80 ?
337                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
338
339                         if (floppy->failed_pc)
340                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
341
342                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
343                                   floppy->sense_key, floppy->asc, floppy->ascq);
344                 } else
345                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
346                                         "Aborting request!\n");
347         }
348
349         idefloppy_end_request(drive, uptodate, 0);
350 }
351
352 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
353 {
354         memset(pc, 0, sizeof(*pc));
355         pc->buf = pc->pc_buf;
356         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
357         pc->callback = ide_floppy_callback;
358 }
359
360 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
361 {
362         idefloppy_init_pc(pc);
363         pc->c[0] = GPCMD_REQUEST_SENSE;
364         pc->c[4] = 255;
365         pc->req_xfer = 18;
366 }
367
368 /*
369  * Called when an error was detected during the last packet command. We queue a
370  * request sense packet command in the head of the request list.
371  */
372 static void idefloppy_retry_pc(ide_drive_t *drive)
373 {
374         struct ide_atapi_pc *pc;
375         struct request *rq;
376
377         (void)ide_read_error(drive);
378         pc = idefloppy_next_pc_storage(drive);
379         rq = idefloppy_next_rq_storage(drive);
380         idefloppy_create_request_sense_cmd(pc);
381         idefloppy_queue_pc_head(drive, pc, rq);
382 }
383
384 /* The usual interrupt handler called during a packet command. */
385 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
386 {
387         idefloppy_floppy_t *floppy = drive->driver_data;
388
389         return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr,
390                            IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers,
391                            idefloppy_retry_pc, NULL, ide_floppy_io_buffers);
392 }
393
394 /*
395  * What we have here is a classic case of a top half / bottom half interrupt
396  * service routine. In interrupt mode, the device sends an interrupt to signal
397  * that it is ready to receive a packet. However, we need to delay about 2-3
398  * ticks before issuing the packet or we gets in trouble.
399  */
400 static int idefloppy_transfer_pc(ide_drive_t *drive)
401 {
402         idefloppy_floppy_t *floppy = drive->driver_data;
403
404         /* Send the actual packet */
405         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
406
407         /* Timeout for the packet command */
408         return IDEFLOPPY_WAIT_CMD;
409 }
410
411
412 /*
413  * Called as an interrupt (or directly). When the device says it's ready for a
414  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
415  * transfer_pc.
416  */
417 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
418 {
419         idefloppy_floppy_t *floppy = drive->driver_data;
420         struct ide_atapi_pc *pc = floppy->pc;
421         ide_expiry_t *expiry;
422         unsigned int timeout;
423
424         /*
425          * The following delay solves a problem with ATAPI Zip 100 drives
426          * where the Busy flag was apparently being deasserted before the
427          * unit was ready to receive data. This was happening on a
428          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
429          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
430          * used until after the packet is moved in about 50 msec.
431          */
432         if (pc->flags & PC_FLAG_ZIP_DRIVE) {
433                 timeout = floppy->ticks;
434                 expiry = &idefloppy_transfer_pc;
435         } else {
436                 timeout = IDEFLOPPY_WAIT_CMD;
437                 expiry = NULL;
438         }
439
440         return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry);
441 }
442
443 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
444                                     struct ide_atapi_pc *pc)
445 {
446         /* supress error messages resulting from Medium not present */
447         if (floppy->sense_key == 0x02 &&
448             floppy->asc       == 0x3a &&
449             floppy->ascq      == 0x00)
450                 return;
451
452         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
453                         "asc = %2x, ascq = %2x\n",
454                         floppy->drive->name, pc->c[0], floppy->sense_key,
455                         floppy->asc, floppy->ascq);
456
457 }
458
459 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
460                 struct ide_atapi_pc *pc)
461 {
462         idefloppy_floppy_t *floppy = drive->driver_data;
463
464         if (floppy->failed_pc == NULL &&
465             pc->c[0] != GPCMD_REQUEST_SENSE)
466                 floppy->failed_pc = pc;
467         /* Set the current packet command */
468         floppy->pc = pc;
469
470         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
471                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
472                         ide_floppy_report_error(floppy, pc);
473                 /* Giving up */
474                 pc->error = IDEFLOPPY_ERROR_GENERAL;
475
476                 floppy->failed_pc = NULL;
477                 pc->callback(drive);
478                 return ide_stopped;
479         }
480
481         debug_log("Retry number - %d\n", pc->retries);
482
483         pc->retries++;
484
485         return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer,
486                             IDEFLOPPY_WAIT_CMD, NULL);
487 }
488
489 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
490 {
491         debug_log("creating prevent removal command, prevent = %d\n", prevent);
492
493         idefloppy_init_pc(pc);
494         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
495         pc->c[4] = prevent;
496 }
497
498 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
499 {
500         idefloppy_init_pc(pc);
501         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
502         pc->c[7] = 255;
503         pc->c[8] = 255;
504         pc->req_xfer = 255;
505 }
506
507 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
508                 int l, int flags)
509 {
510         idefloppy_init_pc(pc);
511         pc->c[0] = GPCMD_FORMAT_UNIT;
512         pc->c[1] = 0x17;
513
514         memset(pc->buf, 0, 12);
515         pc->buf[1] = 0xA2;
516         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
517
518         if (flags & 1)                          /* Verify bit on... */
519                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
520         pc->buf[3] = 8;
521
522         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
523         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
524         pc->buf_size = 12;
525         pc->flags |= PC_FLAG_WRITING;
526 }
527
528 /* A mode sense command is used to "sense" floppy parameters. */
529 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
530                 u8 page_code, u8 type)
531 {
532         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
533
534         idefloppy_init_pc(pc);
535         pc->c[0] = GPCMD_MODE_SENSE_10;
536         pc->c[1] = 0;
537         pc->c[2] = page_code + (type << 6);
538
539         switch (page_code) {
540         case IDEFLOPPY_CAPABILITIES_PAGE:
541                 length += 12;
542                 break;
543         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
544                 length += 32;
545                 break;
546         default:
547                 printk(KERN_ERR "ide-floppy: unsupported page code "
548                                 "in create_mode_sense_cmd\n");
549         }
550         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
551         pc->req_xfer = length;
552 }
553
554 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
555 {
556         idefloppy_init_pc(pc);
557         pc->c[0] = GPCMD_START_STOP_UNIT;
558         pc->c[4] = start;
559 }
560
561 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
562                                     struct ide_atapi_pc *pc, struct request *rq,
563                                     unsigned long sector)
564 {
565         int block = sector / floppy->bs_factor;
566         int blocks = rq->nr_sectors / floppy->bs_factor;
567         int cmd = rq_data_dir(rq);
568
569         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
570                 block, blocks);
571
572         idefloppy_init_pc(pc);
573         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
574         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
575         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
576
577         pc->rq = rq;
578         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
579         if (rq->cmd_flags & REQ_RW)
580                 pc->flags |= PC_FLAG_WRITING;
581         pc->buf = NULL;
582         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
583         pc->flags |= PC_FLAG_DMA_OK;
584 }
585
586 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
587                 struct ide_atapi_pc *pc, struct request *rq)
588 {
589         idefloppy_init_pc(pc);
590         memcpy(pc->c, rq->cmd, sizeof(pc->c));
591         pc->rq = rq;
592         pc->b_count = rq->data_len;
593         if (rq->data_len && rq_data_dir(rq) == WRITE)
594                 pc->flags |= PC_FLAG_WRITING;
595         pc->buf = rq->data;
596         if (rq->bio)
597                 pc->flags |= PC_FLAG_DMA_OK;
598         /*
599          * possibly problematic, doesn't look like ide-floppy correctly
600          * handled scattered requests if dma fails...
601          */
602         pc->req_xfer = pc->buf_size = rq->data_len;
603 }
604
605 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
606                 struct request *rq, sector_t block_s)
607 {
608         idefloppy_floppy_t *floppy = drive->driver_data;
609         struct ide_atapi_pc *pc;
610         unsigned long block = (unsigned long)block_s;
611
612         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
613                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
614                         rq->cmd_type, rq->errors);
615         debug_log("sector: %ld, nr_sectors: %ld, "
616                         "current_nr_sectors: %d\n", (long)rq->sector,
617                         rq->nr_sectors, rq->current_nr_sectors);
618
619         if (rq->errors >= ERROR_MAX) {
620                 if (floppy->failed_pc)
621                         ide_floppy_report_error(floppy, floppy->failed_pc);
622                 else
623                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
624                                 drive->name);
625                 idefloppy_end_request(drive, 0, 0);
626                 return ide_stopped;
627         }
628         if (blk_fs_request(rq)) {
629                 if (((long)rq->sector % floppy->bs_factor) ||
630                     (rq->nr_sectors % floppy->bs_factor)) {
631                         printk(KERN_ERR "%s: unsupported r/w request size\n",
632                                         drive->name);
633                         idefloppy_end_request(drive, 0, 0);
634                         return ide_stopped;
635                 }
636                 pc = idefloppy_next_pc_storage(drive);
637                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
638         } else if (blk_special_request(rq)) {
639                 pc = (struct ide_atapi_pc *) rq->buffer;
640         } else if (blk_pc_request(rq)) {
641                 pc = idefloppy_next_pc_storage(drive);
642                 idefloppy_blockpc_cmd(floppy, pc, rq);
643         } else {
644                 blk_dump_rq_flags(rq,
645                         "ide-floppy: unsupported command in queue");
646                 idefloppy_end_request(drive, 0, 0);
647                 return ide_stopped;
648         }
649
650         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT)
651                 pc->flags |= PC_FLAG_DRQ_INTERRUPT;
652
653         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE)
654                 pc->flags |= PC_FLAG_ZIP_DRIVE;
655
656         pc->rq = rq;
657
658         return idefloppy_issue_pc(drive, pc);
659 }
660
661 /*
662  * Add a special packet command request to the tail of the request queue,
663  * and wait for it to be serviced.
664  */
665 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
666 {
667         struct ide_floppy_obj *floppy = drive->driver_data;
668         struct request *rq;
669         int error;
670
671         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
672         rq->buffer = (char *) pc;
673         rq->cmd_type = REQ_TYPE_SPECIAL;
674         error = blk_execute_rq(drive->queue, floppy->disk, rq, 0);
675         blk_put_request(rq);
676
677         return error;
678 }
679
680 /*
681  * Look at the flexible disk page parameters. We ignore the CHS capacity
682  * parameters and use the LBA parameters instead.
683  */
684 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
685 {
686         idefloppy_floppy_t *floppy = drive->driver_data;
687         struct ide_atapi_pc pc;
688         u8 *page;
689         int capacity, lba_capacity;
690         u16 transfer_rate, sector_size, cyls, rpm;
691         u8 heads, sectors;
692
693         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
694                                         MODE_SENSE_CURRENT);
695
696         if (idefloppy_queue_pc_tail(drive, &pc)) {
697                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
698                                 " parameters\n");
699                 return 1;
700         }
701         floppy->wp = !!(pc.buf[3] & 0x80);
702         set_disk_ro(floppy->disk, floppy->wp);
703         page = &pc.buf[8];
704
705         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
706         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
707         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
708         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
709         heads         = pc.buf[8 + 4];
710         sectors       = pc.buf[8 + 5];
711
712         capacity = cyls * heads * sectors * sector_size;
713
714         if (memcmp(page, &floppy->flexible_disk_page, 32))
715                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
716                                 "%d sector size, %d rpm\n",
717                                 drive->name, capacity / 1024, cyls, heads,
718                                 sectors, transfer_rate / 8, sector_size, rpm);
719
720         memcpy(&floppy->flexible_disk_page, page, 32);
721         drive->bios_cyl = cyls;
722         drive->bios_head = heads;
723         drive->bios_sect = sectors;
724         lba_capacity = floppy->blocks * floppy->block_size;
725
726         if (capacity < lba_capacity) {
727                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
728                         "bytes, but the drive only handles %d\n",
729                         drive->name, lba_capacity, capacity);
730                 floppy->blocks = floppy->block_size ?
731                         capacity / floppy->block_size : 0;
732         }
733         return 0;
734 }
735
736 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
737 {
738         idefloppy_floppy_t *floppy = drive->driver_data;
739         struct ide_atapi_pc pc;
740
741         floppy->srfp = 0;
742         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
743                                                  MODE_SENSE_CURRENT);
744
745         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
746         if (idefloppy_queue_pc_tail(drive, &pc))
747                 return 1;
748
749         floppy->srfp = pc.buf[8 + 2] & 0x40;
750         return (0);
751 }
752
753 /*
754  * Determine if a media is present in the floppy drive, and if so, its LBA
755  * capacity.
756  */
757 static int ide_floppy_get_capacity(ide_drive_t *drive)
758 {
759         idefloppy_floppy_t *floppy = drive->driver_data;
760         struct ide_atapi_pc pc;
761         u8 *cap_desc;
762         u8 header_len, desc_cnt;
763         int i, rc = 1, blocks, length;
764
765         drive->bios_cyl = 0;
766         drive->bios_head = drive->bios_sect = 0;
767         floppy->blocks = 0;
768         floppy->bs_factor = 1;
769         set_capacity(floppy->disk, 0);
770
771         idefloppy_create_read_capacity_cmd(&pc);
772         if (idefloppy_queue_pc_tail(drive, &pc)) {
773                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
774                 return 1;
775         }
776         header_len = pc.buf[3];
777         cap_desc = &pc.buf[4];
778         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
779
780         for (i = 0; i < desc_cnt; i++) {
781                 unsigned int desc_start = 4 + i*8;
782
783                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
784                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
785
786                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
787                                 i, blocks * length / 1024, blocks, length);
788
789                 if (i)
790                         continue;
791                 /*
792                  * the code below is valid only for the 1st descriptor, ie i=0
793                  */
794
795                 switch (pc.buf[desc_start + 4] & 0x03) {
796                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
797                 case CAPACITY_UNFORMATTED:
798                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
799                                 /*
800                                  * If it is not a clik drive, break out
801                                  * (maintains previous driver behaviour)
802                                  */
803                                 break;
804                 case CAPACITY_CURRENT:
805                         /* Normal Zip/LS-120 disks */
806                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
807                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
808                                         "sector size\n", drive->name,
809                                         blocks * length / 1024, blocks, length);
810                         memcpy(&floppy->cap_desc, cap_desc, 8);
811
812                         if (!length || length % 512) {
813                                 printk(KERN_NOTICE "%s: %d bytes block size "
814                                         "not supported\n", drive->name, length);
815                         } else {
816                                 floppy->blocks = blocks;
817                                 floppy->block_size = length;
818                                 floppy->bs_factor = length / 512;
819                                 if (floppy->bs_factor != 1)
820                                         printk(KERN_NOTICE "%s: warning: non "
821                                                 "512 bytes block size not "
822                                                 "fully supported\n",
823                                                 drive->name);
824                                 rc = 0;
825                         }
826                         break;
827                 case CAPACITY_NO_CARTRIDGE:
828                         /*
829                          * This is a KERN_ERR so it appears on screen
830                          * for the user to see
831                          */
832                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
833                         break;
834                 case CAPACITY_INVALID:
835                         printk(KERN_ERR "%s: Invalid capacity for disk "
836                                 "in drive\n", drive->name);
837                         break;
838                 }
839                 debug_log("Descriptor 0 Code: %d\n",
840                           pc.buf[desc_start + 4] & 0x03);
841         }
842
843         /* Clik! disk does not support get_flexible_disk_page */
844         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
845                 (void) ide_floppy_get_flexible_disk_page(drive);
846
847         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
848         return rc;
849 }
850
851 /*
852  * Obtain the list of formattable capacities.
853  * Very similar to ide_floppy_get_capacity, except that we push the capacity
854  * descriptors to userland, instead of our own structures.
855  *
856  * Userland gives us the following structure:
857  *
858  * struct idefloppy_format_capacities {
859  *      int nformats;
860  *      struct {
861  *              int nblocks;
862  *              int blocksize;
863  *      } formats[];
864  * };
865  *
866  * userland initializes nformats to the number of allocated formats[] records.
867  * On exit we set nformats to the number of records we've actually initialized.
868  */
869
870 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
871 {
872         struct ide_atapi_pc pc;
873         u8 header_len, desc_cnt;
874         int i, blocks, length, u_array_size, u_index;
875         int __user *argp;
876
877         if (get_user(u_array_size, arg))
878                 return (-EFAULT);
879
880         if (u_array_size <= 0)
881                 return (-EINVAL);
882
883         idefloppy_create_read_capacity_cmd(&pc);
884         if (idefloppy_queue_pc_tail(drive, &pc)) {
885                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
886                 return (-EIO);
887         }
888         header_len = pc.buf[3];
889         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
890
891         u_index = 0;
892         argp = arg + 1;
893
894         /*
895          * We always skip the first capacity descriptor.  That's the current
896          * capacity.  We are interested in the remaining descriptors, the
897          * formattable capacities.
898          */
899         for (i = 1; i < desc_cnt; i++) {
900                 unsigned int desc_start = 4 + i*8;
901
902                 if (u_index >= u_array_size)
903                         break;  /* User-supplied buffer too small */
904
905                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
906                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
907
908                 if (put_user(blocks, argp))
909                         return(-EFAULT);
910                 ++argp;
911
912                 if (put_user(length, argp))
913                         return (-EFAULT);
914                 ++argp;
915
916                 ++u_index;
917         }
918
919         if (put_user(u_index, arg))
920                 return (-EFAULT);
921         return (0);
922 }
923
924 /*
925  * Get ATAPI_FORMAT_UNIT progress indication.
926  *
927  * Userland gives a pointer to an int.  The int is set to a progress
928  * indicator 0-65536, with 65536=100%.
929  *
930  * If the drive does not support format progress indication, we just check
931  * the dsc bit, and return either 0 or 65536.
932  */
933
934 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
935 {
936         idefloppy_floppy_t *floppy = drive->driver_data;
937         struct ide_atapi_pc pc;
938         int progress_indication = 0x10000;
939
940         if (floppy->srfp) {
941                 idefloppy_create_request_sense_cmd(&pc);
942                 if (idefloppy_queue_pc_tail(drive, &pc))
943                         return (-EIO);
944
945                 if (floppy->sense_key == 2 &&
946                     floppy->asc == 4 &&
947                     floppy->ascq == 4)
948                         progress_indication = floppy->progress_indication;
949
950                 /* Else assume format_unit has finished, and we're at 0x10000 */
951         } else {
952                 unsigned long flags;
953                 u8 stat;
954
955                 local_irq_save(flags);
956                 stat = ide_read_status(drive);
957                 local_irq_restore(flags);
958
959                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
960         }
961         if (put_user(progress_indication, arg))
962                 return (-EFAULT);
963
964         return (0);
965 }
966
967 static sector_t idefloppy_capacity(ide_drive_t *drive)
968 {
969         idefloppy_floppy_t *floppy = drive->driver_data;
970         unsigned long capacity = floppy->blocks * floppy->bs_factor;
971
972         return capacity;
973 }
974
975 /*
976  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
977  * results.
978  */
979 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
980 {
981         u8 gcw[2];
982         u8 device_type, protocol, removable, drq_type, packet_size;
983
984         *((u16 *) &gcw) = id->config;
985
986         device_type =  gcw[1] & 0x1F;
987         removable   = (gcw[0] & 0x80) >> 7;
988         protocol    = (gcw[1] & 0xC0) >> 6;
989         drq_type    = (gcw[0] & 0x60) >> 5;
990         packet_size =  gcw[0] & 0x03;
991
992 #ifdef CONFIG_PPC
993         /* kludge for Apple PowerBook internal zip */
994         if (device_type == 5 &&
995             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
996                 device_type = 0;
997 #endif
998
999         if (protocol != 2)
1000                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1001                         protocol);
1002         else if (device_type != 0)
1003                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1004                                 "to floppy\n", device_type);
1005         else if (!removable)
1006                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1007         else if (drq_type == 3)
1008                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1009                                 "supported\n", drq_type);
1010         else if (packet_size != 0)
1011                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1012                                 "bytes\n", packet_size);
1013         else
1014                 return 1;
1015         return 0;
1016 }
1017
1018 #ifdef CONFIG_IDE_PROC_FS
1019 static void idefloppy_add_settings(ide_drive_t *drive)
1020 {
1021         idefloppy_floppy_t *floppy = drive->driver_data;
1022
1023         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1024                         &drive->bios_cyl, NULL);
1025         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1026                         &drive->bios_head, NULL);
1027         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1028                         &drive->bios_sect, NULL);
1029         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1030                         &floppy->ticks,  NULL);
1031 }
1032 #else
1033 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1034 #endif
1035
1036 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1037 {
1038         u8 gcw[2];
1039
1040         *((u16 *) &gcw) = drive->id->config;
1041         floppy->pc = floppy->pc_stack;
1042
1043         if (((gcw[0] & 0x60) >> 5) == 1)
1044                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1045         /*
1046          * We used to check revisions here. At this point however I'm giving up.
1047          * Just assume they are all broken, its easier.
1048          *
1049          * The actual reason for the workarounds was likely a driver bug after
1050          * all rather than a firmware bug, and the workaround below used to hide
1051          * it. It should be fixed as of version 1.9, but to be on the safe side
1052          * we'll leave the limitation below for the 2.2.x tree.
1053          */
1054         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1055                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1056                 /* This value will be visible in the /proc/ide/hdx/settings */
1057                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1058                 blk_queue_max_sectors(drive->queue, 64);
1059         }
1060
1061         /*
1062          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1063          * nasty clicking noises without it, so please don't remove this.
1064          */
1065         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1066                 blk_queue_max_sectors(drive->queue, 64);
1067                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1068         }
1069
1070         (void) ide_floppy_get_capacity(drive);
1071         idefloppy_add_settings(drive);
1072 }
1073
1074 static void ide_floppy_remove(ide_drive_t *drive)
1075 {
1076         idefloppy_floppy_t *floppy = drive->driver_data;
1077         struct gendisk *g = floppy->disk;
1078
1079         ide_proc_unregister_driver(drive, floppy->driver);
1080
1081         del_gendisk(g);
1082
1083         ide_floppy_put(floppy);
1084 }
1085
1086 static void idefloppy_cleanup_obj(struct kref *kref)
1087 {
1088         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1089         ide_drive_t *drive = floppy->drive;
1090         struct gendisk *g = floppy->disk;
1091
1092         drive->driver_data = NULL;
1093         g->private_data = NULL;
1094         put_disk(g);
1095         kfree(floppy);
1096 }
1097
1098 #ifdef CONFIG_IDE_PROC_FS
1099 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1100                 int count, int *eof, void *data)
1101 {
1102         ide_drive_t*drive = (ide_drive_t *)data;
1103         int len;
1104
1105         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1106         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1107 }
1108
1109 static ide_proc_entry_t idefloppy_proc[] = {
1110         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1111         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1112         { NULL, 0, NULL, NULL }
1113 };
1114 #endif  /* CONFIG_IDE_PROC_FS */
1115
1116 static int ide_floppy_probe(ide_drive_t *);
1117
1118 static ide_driver_t idefloppy_driver = {
1119         .gen_driver = {
1120                 .owner          = THIS_MODULE,
1121                 .name           = "ide-floppy",
1122                 .bus            = &ide_bus_type,
1123         },
1124         .probe                  = ide_floppy_probe,
1125         .remove                 = ide_floppy_remove,
1126         .version                = IDEFLOPPY_VERSION,
1127         .media                  = ide_floppy,
1128         .supports_dsc_overlap   = 0,
1129         .do_request             = idefloppy_do_request,
1130         .end_request            = idefloppy_end_request,
1131         .error                  = __ide_error,
1132 #ifdef CONFIG_IDE_PROC_FS
1133         .proc                   = idefloppy_proc,
1134 #endif
1135 };
1136
1137 static int idefloppy_open(struct inode *inode, struct file *filp)
1138 {
1139         struct gendisk *disk = inode->i_bdev->bd_disk;
1140         struct ide_floppy_obj *floppy;
1141         ide_drive_t *drive;
1142         struct ide_atapi_pc pc;
1143         int ret = 0;
1144
1145         debug_log("Reached %s\n", __func__);
1146
1147         floppy = ide_floppy_get(disk);
1148         if (!floppy)
1149                 return -ENXIO;
1150
1151         drive = floppy->drive;
1152
1153         floppy->openers++;
1154
1155         if (floppy->openers == 1) {
1156                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1157                 /* Just in case */
1158
1159                 idefloppy_init_pc(&pc);
1160                 pc.c[0] = GPCMD_TEST_UNIT_READY;
1161
1162                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1163                         idefloppy_create_start_stop_cmd(&pc, 1);
1164                         (void) idefloppy_queue_pc_tail(drive, &pc);
1165                 }
1166
1167                 if (ide_floppy_get_capacity(drive)
1168                    && (filp->f_flags & O_NDELAY) == 0
1169                     /*
1170                      * Allow O_NDELAY to open a drive without a disk, or with an
1171                      * unreadable disk, so that we can get the format capacity
1172                      * of the drive or begin the format - Sam
1173                      */
1174                     ) {
1175                         ret = -EIO;
1176                         goto out_put_floppy;
1177                 }
1178
1179                 if (floppy->wp && (filp->f_mode & 2)) {
1180                         ret = -EROFS;
1181                         goto out_put_floppy;
1182                 }
1183                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1184                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1185                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1186                         idefloppy_create_prevent_cmd(&pc, 1);
1187                         (void) idefloppy_queue_pc_tail(drive, &pc);
1188                 }
1189                 check_disk_change(inode->i_bdev);
1190         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1191                 ret = -EBUSY;
1192                 goto out_put_floppy;
1193         }
1194         return 0;
1195
1196 out_put_floppy:
1197         floppy->openers--;
1198         ide_floppy_put(floppy);
1199         return ret;
1200 }
1201
1202 static int idefloppy_release(struct inode *inode, struct file *filp)
1203 {
1204         struct gendisk *disk = inode->i_bdev->bd_disk;
1205         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1206         ide_drive_t *drive = floppy->drive;
1207         struct ide_atapi_pc pc;
1208
1209         debug_log("Reached %s\n", __func__);
1210
1211         if (floppy->openers == 1) {
1212                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1213                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1214                         idefloppy_create_prevent_cmd(&pc, 0);
1215                         (void) idefloppy_queue_pc_tail(drive, &pc);
1216                 }
1217
1218                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1219         }
1220
1221         floppy->openers--;
1222
1223         ide_floppy_put(floppy);
1224
1225         return 0;
1226 }
1227
1228 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1229 {
1230         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1231         ide_drive_t *drive = floppy->drive;
1232
1233         geo->heads = drive->bios_head;
1234         geo->sectors = drive->bios_sect;
1235         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1236         return 0;
1237 }
1238
1239 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1240                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1241 {
1242         if (floppy->openers > 1)
1243                 return -EBUSY;
1244
1245         /* The IOMEGA Clik! Drive doesn't support this command -
1246          * no room for an eject mechanism */
1247         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1248                 int prevent = arg ? 1 : 0;
1249
1250                 if (cmd == CDROMEJECT)
1251                         prevent = 0;
1252
1253                 idefloppy_create_prevent_cmd(pc, prevent);
1254                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1255         }
1256
1257         if (cmd == CDROMEJECT) {
1258                 idefloppy_create_start_stop_cmd(pc, 2);
1259                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1260         }
1261
1262         return 0;
1263 }
1264
1265 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1266                                   int __user *arg)
1267 {
1268         int blocks, length, flags, err = 0;
1269         struct ide_atapi_pc pc;
1270
1271         if (floppy->openers > 1) {
1272                 /* Don't format if someone is using the disk */
1273                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1274                 return -EBUSY;
1275         }
1276
1277         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1278
1279         /*
1280          * Send ATAPI_FORMAT_UNIT to the drive.
1281          *
1282          * Userland gives us the following structure:
1283          *
1284          * struct idefloppy_format_command {
1285          *        int nblocks;
1286          *        int blocksize;
1287          *        int flags;
1288          *        } ;
1289          *
1290          * flags is a bitmask, currently, the only defined flag is:
1291          *
1292          *        0x01 - verify media after format.
1293          */
1294         if (get_user(blocks, arg) ||
1295                         get_user(length, arg+1) ||
1296                         get_user(flags, arg+2)) {
1297                 err = -EFAULT;
1298                 goto out;
1299         }
1300
1301         (void) idefloppy_get_sfrp_bit(floppy->drive);
1302         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1303
1304         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1305                 err = -EIO;
1306
1307 out:
1308         if (err)
1309                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1310         return err;
1311 }
1312
1313
1314 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1315                         unsigned int cmd, unsigned long arg)
1316 {
1317         struct block_device *bdev = inode->i_bdev;
1318         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1319         ide_drive_t *drive = floppy->drive;
1320         struct ide_atapi_pc pc;
1321         void __user *argp = (void __user *)arg;
1322         int err;
1323
1324         switch (cmd) {
1325         case CDROMEJECT:
1326                 /* fall through */
1327         case CDROM_LOCKDOOR:
1328                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1329         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1330                 return 0;
1331         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1332                 return ide_floppy_get_format_capacities(drive, argp);
1333         case IDEFLOPPY_IOCTL_FORMAT_START:
1334                 if (!(file->f_mode & 2))
1335                         return -EPERM;
1336
1337                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1338         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1339                 return idefloppy_get_format_progress(drive, argp);
1340         }
1341
1342         /*
1343          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1344          * and CDROM_SEND_PACKET (legacy) ioctls
1345          */
1346         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1347                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1348                                         bdev->bd_disk, cmd, argp);
1349         else
1350                 err = -ENOTTY;
1351
1352         if (err == -ENOTTY)
1353                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1354
1355         return err;
1356 }
1357
1358 static int idefloppy_media_changed(struct gendisk *disk)
1359 {
1360         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1361         ide_drive_t *drive = floppy->drive;
1362         int ret;
1363
1364         /* do not scan partitions twice if this is a removable device */
1365         if (drive->attach) {
1366                 drive->attach = 0;
1367                 return 0;
1368         }
1369         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1370         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1371         return ret;
1372 }
1373
1374 static int idefloppy_revalidate_disk(struct gendisk *disk)
1375 {
1376         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1377         set_capacity(disk, idefloppy_capacity(floppy->drive));
1378         return 0;
1379 }
1380
1381 static struct block_device_operations idefloppy_ops = {
1382         .owner                  = THIS_MODULE,
1383         .open                   = idefloppy_open,
1384         .release                = idefloppy_release,
1385         .ioctl                  = idefloppy_ioctl,
1386         .getgeo                 = idefloppy_getgeo,
1387         .media_changed          = idefloppy_media_changed,
1388         .revalidate_disk        = idefloppy_revalidate_disk
1389 };
1390
1391 static int ide_floppy_probe(ide_drive_t *drive)
1392 {
1393         idefloppy_floppy_t *floppy;
1394         struct gendisk *g;
1395
1396         if (!strstr("ide-floppy", drive->driver_req))
1397                 goto failed;
1398         if (!drive->present)
1399                 goto failed;
1400         if (drive->media != ide_floppy)
1401                 goto failed;
1402         if (!idefloppy_identify_device(drive, drive->id)) {
1403                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1404                                 " of ide-floppy\n", drive->name);
1405                 goto failed;
1406         }
1407         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1408         if (!floppy) {
1409                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1410                                 " structure\n", drive->name);
1411                 goto failed;
1412         }
1413
1414         g = alloc_disk(1 << PARTN_BITS);
1415         if (!g)
1416                 goto out_free_floppy;
1417
1418         ide_init_disk(g, drive);
1419
1420         ide_proc_register_driver(drive, &idefloppy_driver);
1421
1422         kref_init(&floppy->kref);
1423
1424         floppy->drive = drive;
1425         floppy->driver = &idefloppy_driver;
1426         floppy->disk = g;
1427
1428         g->private_data = &floppy->driver;
1429
1430         drive->driver_data = floppy;
1431
1432         idefloppy_setup(drive, floppy);
1433
1434         g->minors = 1 << PARTN_BITS;
1435         g->driverfs_dev = &drive->gendev;
1436         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1437         g->fops = &idefloppy_ops;
1438         drive->attach = 1;
1439         add_disk(g);
1440         return 0;
1441
1442 out_free_floppy:
1443         kfree(floppy);
1444 failed:
1445         return -ENODEV;
1446 }
1447
1448 static void __exit idefloppy_exit(void)
1449 {
1450         driver_unregister(&idefloppy_driver.gen_driver);
1451 }
1452
1453 static int __init idefloppy_init(void)
1454 {
1455         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1456         return driver_register(&idefloppy_driver.gen_driver);
1457 }
1458
1459 MODULE_ALIAS("ide:*m-floppy*");
1460 module_init(idefloppy_init);
1461 module_exit(idefloppy_exit);
1462 MODULE_LICENSE("GPL");
1463 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1464