ide: make ide_pc_intr() static
[linux-2.6.git] / drivers / ide / ide-floppy.c
1 /*
2  * IDE ATAPI floppy driver.
3  *
4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
7  *
8  * This driver supports the following IDE floppy drives:
9  *
10  * LS-120/240 SuperDisk
11  * Iomega Zip 100/250
12  * Iomega PC Card Clik!/PocketZip
13  *
14  * For a historical changelog see
15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
16  */
17
18 #define 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 #include "ide-floppy.h"
50
51 /* define to see debug info */
52 #define IDEFLOPPY_DEBUG_LOG             0
53
54 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
55 #define IDEFLOPPY_DEBUG(fmt, args...)
56
57 #if IDEFLOPPY_DEBUG_LOG
58 #define debug_log(fmt, args...) \
59         printk(KERN_INFO "ide-floppy: " fmt, ## args)
60 #else
61 #define debug_log(fmt, args...) do {} while (0)
62 #endif
63
64 /*
65  * After each failed packet command we issue a request sense command and retry
66  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
67  */
68 #define IDEFLOPPY_MAX_PC_RETRIES        3
69
70 /* format capacities descriptor codes */
71 #define CAPACITY_INVALID        0x00
72 #define CAPACITY_UNFORMATTED    0x01
73 #define CAPACITY_CURRENT        0x02
74 #define CAPACITY_NO_CARTRIDGE   0x03
75
76 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
77
78 /* Error code returned in rq->errors to the higher part of the driver. */
79 #define IDEFLOPPY_ERROR_GENERAL         101
80
81 static DEFINE_MUTEX(idefloppy_ref_mutex);
82
83 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
84
85 #define ide_floppy_g(disk) \
86         container_of((disk)->private_data, struct ide_floppy_obj, driver)
87
88 static void idefloppy_cleanup_obj(struct kref *);
89
90 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
91 {
92         struct ide_floppy_obj *floppy = NULL;
93
94         mutex_lock(&idefloppy_ref_mutex);
95         floppy = ide_floppy_g(disk);
96         if (floppy) {
97                 if (ide_device_get(floppy->drive))
98                         floppy = NULL;
99                 else
100                         kref_get(&floppy->kref);
101         }
102         mutex_unlock(&idefloppy_ref_mutex);
103         return floppy;
104 }
105
106 static void ide_floppy_put(struct ide_floppy_obj *floppy)
107 {
108         ide_drive_t *drive = floppy->drive;
109
110         mutex_lock(&idefloppy_ref_mutex);
111         kref_put(&floppy->kref, idefloppy_cleanup_obj);
112         ide_device_put(drive);
113         mutex_unlock(&idefloppy_ref_mutex);
114 }
115
116 /*
117  * Used to finish servicing a request. For read/write requests, we will call
118  * ide_end_request to pass to the next buffer.
119  */
120 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
121 {
122         idefloppy_floppy_t *floppy = drive->driver_data;
123         struct request *rq = HWGROUP(drive)->rq;
124         int error;
125
126         debug_log("Reached %s\n", __func__);
127
128         switch (uptodate) {
129         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
130         case 1: error = 0; break;
131         default: error = uptodate;
132         }
133         if (error)
134                 floppy->failed_pc = NULL;
135         /* Why does this happen? */
136         if (!rq)
137                 return 0;
138         if (!blk_special_request(rq)) {
139                 /* our real local end request function */
140                 ide_end_request(drive, uptodate, nsecs);
141                 return 0;
142         }
143         rq->errors = error;
144         /* fixme: need to move this local also */
145         ide_end_drive_cmd(drive, 0, 0);
146         return 0;
147 }
148
149 static void idefloppy_update_buffers(ide_drive_t *drive,
150                                 struct ide_atapi_pc *pc)
151 {
152         struct request *rq = pc->rq;
153         struct bio *bio = rq->bio;
154
155         while ((bio = rq->bio) != NULL)
156                 idefloppy_end_request(drive, 1, 0);
157 }
158
159 static void ide_floppy_callback(ide_drive_t *drive, int dsc)
160 {
161         idefloppy_floppy_t *floppy = drive->driver_data;
162         struct ide_atapi_pc *pc = drive->pc;
163         int uptodate = pc->error ? 0 : 1;
164
165         debug_log("Reached %s\n", __func__);
166
167         if (floppy->failed_pc == pc)
168                 floppy->failed_pc = NULL;
169
170         if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 ||
171             (pc->rq && blk_pc_request(pc->rq)))
172                 uptodate = 1; /* FIXME */
173         else if (pc->c[0] == GPCMD_REQUEST_SENSE) {
174                 u8 *buf = pc->buf;
175
176                 if (!pc->error) {
177                         floppy->sense_key = buf[2] & 0x0F;
178                         floppy->asc = buf[12];
179                         floppy->ascq = buf[13];
180                         floppy->progress_indication = buf[15] & 0x80 ?
181                                 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
182
183                         if (floppy->failed_pc)
184                                 debug_log("pc = %x, ", floppy->failed_pc->c[0]);
185
186                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
187                                   floppy->sense_key, floppy->asc, floppy->ascq);
188                 } else
189                         printk(KERN_ERR "Error in REQUEST SENSE itself - "
190                                         "Aborting request!\n");
191         }
192
193         idefloppy_end_request(drive, uptodate, 0);
194 }
195
196 /*
197  * What we have here is a classic case of a top half / bottom half interrupt
198  * service routine. In interrupt mode, the device sends an interrupt to signal
199  * that it is ready to receive a packet. However, we need to delay about 2-3
200  * ticks before issuing the packet or we gets in trouble.
201  */
202 static int idefloppy_transfer_pc(ide_drive_t *drive)
203 {
204         /* Send the actual packet */
205         drive->hwif->tp_ops->output_data(drive, NULL, drive->pc->c, 12);
206
207         /* Timeout for the packet command */
208         return WAIT_FLOPPY_CMD;
209 }
210
211 /*
212  * Called as an interrupt (or directly). When the device says it's ready for a
213  * packet, we schedule the packet transfer to occur about 2-3 ticks later in
214  * transfer_pc.
215  */
216 static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive)
217 {
218         idefloppy_floppy_t *floppy = drive->driver_data;
219         ide_expiry_t *expiry;
220         unsigned int timeout;
221
222         /*
223          * The following delay solves a problem with ATAPI Zip 100 drives
224          * where the Busy flag was apparently being deasserted before the
225          * unit was ready to receive data. This was happening on a
226          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
227          * 40 and 50msec work well. ide_pc_intr will not be actually
228          * used until after the packet is moved in about 50 msec.
229          */
230         if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
231                 timeout = floppy->ticks;
232                 expiry = &idefloppy_transfer_pc;
233         } else {
234                 timeout = WAIT_FLOPPY_CMD;
235                 expiry = NULL;
236         }
237
238         return ide_transfer_pc(drive, timeout, expiry);
239 }
240
241 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
242                                     struct ide_atapi_pc *pc)
243 {
244         /* supress error messages resulting from Medium not present */
245         if (floppy->sense_key == 0x02 &&
246             floppy->asc       == 0x3a &&
247             floppy->ascq      == 0x00)
248                 return;
249
250         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
251                         "asc = %2x, ascq = %2x\n",
252                         floppy->drive->name, pc->c[0], floppy->sense_key,
253                         floppy->asc, floppy->ascq);
254
255 }
256
257 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
258                 struct ide_atapi_pc *pc)
259 {
260         idefloppy_floppy_t *floppy = drive->driver_data;
261
262         if (floppy->failed_pc == NULL &&
263             pc->c[0] != GPCMD_REQUEST_SENSE)
264                 floppy->failed_pc = pc;
265
266         /* Set the current packet command */
267         drive->pc = pc;
268
269         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
270                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
271                         ide_floppy_report_error(floppy, pc);
272                 /* Giving up */
273                 pc->error = IDEFLOPPY_ERROR_GENERAL;
274
275                 floppy->failed_pc = NULL;
276                 drive->pc_callback(drive, 0);
277                 return ide_stopped;
278         }
279
280         debug_log("Retry number - %d\n", pc->retries);
281
282         pc->retries++;
283
284         return ide_issue_pc(drive, idefloppy_start_pc_transfer,
285                             WAIT_FLOPPY_CMD, NULL);
286 }
287
288 void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
289 {
290         ide_init_pc(pc);
291         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
292         pc->c[7] = 255;
293         pc->c[8] = 255;
294         pc->req_xfer = 255;
295 }
296
297 /* A mode sense command is used to "sense" floppy parameters. */
298 void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code)
299 {
300         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
301
302         ide_init_pc(pc);
303         pc->c[0] = GPCMD_MODE_SENSE_10;
304         pc->c[1] = 0;
305         pc->c[2] = page_code;
306
307         switch (page_code) {
308         case IDEFLOPPY_CAPABILITIES_PAGE:
309                 length += 12;
310                 break;
311         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
312                 length += 32;
313                 break;
314         default:
315                 printk(KERN_ERR "ide-floppy: unsupported page code "
316                                 "in create_mode_sense_cmd\n");
317         }
318         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
319         pc->req_xfer = length;
320 }
321
322 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
323                                     struct ide_atapi_pc *pc, struct request *rq,
324                                     unsigned long sector)
325 {
326         int block = sector / floppy->bs_factor;
327         int blocks = rq->nr_sectors / floppy->bs_factor;
328         int cmd = rq_data_dir(rq);
329
330         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
331                 block, blocks);
332
333         ide_init_pc(pc);
334         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
335         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
336         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
337
338         memcpy(rq->cmd, pc->c, 12);
339
340         pc->rq = rq;
341         pc->b_count = 0;
342         if (rq->cmd_flags & REQ_RW)
343                 pc->flags |= PC_FLAG_WRITING;
344         pc->buf = NULL;
345         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
346         pc->flags |= PC_FLAG_DMA_OK;
347 }
348
349 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
350                 struct ide_atapi_pc *pc, struct request *rq)
351 {
352         ide_init_pc(pc);
353         memcpy(pc->c, rq->cmd, sizeof(pc->c));
354         pc->rq = rq;
355         pc->b_count = 0;
356         if (rq->data_len && rq_data_dir(rq) == WRITE)
357                 pc->flags |= PC_FLAG_WRITING;
358         pc->buf = rq->data;
359         if (rq->bio)
360                 pc->flags |= PC_FLAG_DMA_OK;
361         /*
362          * possibly problematic, doesn't look like ide-floppy correctly
363          * handled scattered requests if dma fails...
364          */
365         pc->req_xfer = pc->buf_size = rq->data_len;
366 }
367
368 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
369                 struct request *rq, sector_t block_s)
370 {
371         idefloppy_floppy_t *floppy = drive->driver_data;
372         ide_hwif_t *hwif = drive->hwif;
373         struct ide_atapi_pc *pc;
374         unsigned long block = (unsigned long)block_s;
375
376         debug_log("%s: dev: %s, cmd: 0x%x, cmd_type: %x, errors: %d\n",
377                   __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?",
378                   rq->cmd[0], rq->cmd_type, rq->errors);
379
380         debug_log("%s: sector: %ld, nr_sectors: %ld, current_nr_sectors: %d\n",
381                   __func__, (long)rq->sector, rq->nr_sectors,
382                   rq->current_nr_sectors);
383
384         if (rq->errors >= ERROR_MAX) {
385                 if (floppy->failed_pc)
386                         ide_floppy_report_error(floppy, floppy->failed_pc);
387                 else
388                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
389                                 drive->name);
390                 idefloppy_end_request(drive, 0, 0);
391                 return ide_stopped;
392         }
393         if (blk_fs_request(rq)) {
394                 if (((long)rq->sector % floppy->bs_factor) ||
395                     (rq->nr_sectors % floppy->bs_factor)) {
396                         printk(KERN_ERR "%s: unsupported r/w request size\n",
397                                         drive->name);
398                         idefloppy_end_request(drive, 0, 0);
399                         return ide_stopped;
400                 }
401                 pc = &floppy->queued_pc;
402                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
403         } else if (blk_special_request(rq)) {
404                 pc = (struct ide_atapi_pc *) rq->buffer;
405         } else if (blk_pc_request(rq)) {
406                 pc = &floppy->queued_pc;
407                 idefloppy_blockpc_cmd(floppy, pc, rq);
408         } else {
409                 blk_dump_rq_flags(rq,
410                         "ide-floppy: unsupported command in queue");
411                 idefloppy_end_request(drive, 0, 0);
412                 return ide_stopped;
413         }
414
415         ide_init_sg_cmd(drive, rq);
416         ide_map_sg(drive, rq);
417
418         pc->sg = hwif->sg_table;
419         pc->sg_cnt = hwif->sg_nents;
420
421         pc->rq = rq;
422
423         return idefloppy_issue_pc(drive, pc);
424 }
425
426 /*
427  * Look at the flexible disk page parameters. We ignore the CHS capacity
428  * parameters and use the LBA parameters instead.
429  */
430 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
431 {
432         idefloppy_floppy_t *floppy = drive->driver_data;
433         struct gendisk *disk = floppy->disk;
434         struct ide_atapi_pc pc;
435         u8 *page;
436         int capacity, lba_capacity;
437         u16 transfer_rate, sector_size, cyls, rpm;
438         u8 heads, sectors;
439
440         ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE);
441
442         if (ide_queue_pc_tail(drive, disk, &pc)) {
443                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
444                                 " parameters\n");
445                 return 1;
446         }
447
448         if (pc.buf[3] & 0x80)
449                 drive->atapi_flags |= IDE_AFLAG_WP;
450         else
451                 drive->atapi_flags &= ~IDE_AFLAG_WP;
452
453         set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP));
454
455         page = &pc.buf[8];
456
457         transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]);
458         sector_size   = be16_to_cpup((__be16 *)&pc.buf[8 + 6]);
459         cyls          = be16_to_cpup((__be16 *)&pc.buf[8 + 8]);
460         rpm           = be16_to_cpup((__be16 *)&pc.buf[8 + 28]);
461         heads         = pc.buf[8 + 4];
462         sectors       = pc.buf[8 + 5];
463
464         capacity = cyls * heads * sectors * sector_size;
465
466         if (memcmp(page, &floppy->flexible_disk_page, 32))
467                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
468                                 "%d sector size, %d rpm\n",
469                                 drive->name, capacity / 1024, cyls, heads,
470                                 sectors, transfer_rate / 8, sector_size, rpm);
471
472         memcpy(&floppy->flexible_disk_page, page, 32);
473         drive->bios_cyl = cyls;
474         drive->bios_head = heads;
475         drive->bios_sect = sectors;
476         lba_capacity = floppy->blocks * floppy->block_size;
477
478         if (capacity < lba_capacity) {
479                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
480                         "bytes, but the drive only handles %d\n",
481                         drive->name, lba_capacity, capacity);
482                 floppy->blocks = floppy->block_size ?
483                         capacity / floppy->block_size : 0;
484         }
485         return 0;
486 }
487
488 /*
489  * Determine if a media is present in the floppy drive, and if so, its LBA
490  * capacity.
491  */
492 static int ide_floppy_get_capacity(ide_drive_t *drive)
493 {
494         idefloppy_floppy_t *floppy = drive->driver_data;
495         struct gendisk *disk = floppy->disk;
496         struct ide_atapi_pc pc;
497         u8 *cap_desc;
498         u8 header_len, desc_cnt;
499         int i, rc = 1, blocks, length;
500
501         drive->bios_cyl = 0;
502         drive->bios_head = drive->bios_sect = 0;
503         floppy->blocks = 0;
504         floppy->bs_factor = 1;
505         set_capacity(floppy->disk, 0);
506
507         ide_floppy_create_read_capacity_cmd(&pc);
508         if (ide_queue_pc_tail(drive, disk, &pc)) {
509                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
510                 return 1;
511         }
512         header_len = pc.buf[3];
513         cap_desc = &pc.buf[4];
514         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
515
516         for (i = 0; i < desc_cnt; i++) {
517                 unsigned int desc_start = 4 + i*8;
518
519                 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]);
520                 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]);
521
522                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
523                                 i, blocks * length / 1024, blocks, length);
524
525                 if (i)
526                         continue;
527                 /*
528                  * the code below is valid only for the 1st descriptor, ie i=0
529                  */
530
531                 switch (pc.buf[desc_start + 4] & 0x03) {
532                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
533                 case CAPACITY_UNFORMATTED:
534                         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
535                                 /*
536                                  * If it is not a clik drive, break out
537                                  * (maintains previous driver behaviour)
538                                  */
539                                 break;
540                 case CAPACITY_CURRENT:
541                         /* Normal Zip/LS-120 disks */
542                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
543                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
544                                         "sector size\n", drive->name,
545                                         blocks * length / 1024, blocks, length);
546                         memcpy(&floppy->cap_desc, cap_desc, 8);
547
548                         if (!length || length % 512) {
549                                 printk(KERN_NOTICE "%s: %d bytes block size "
550                                         "not supported\n", drive->name, length);
551                         } else {
552                                 floppy->blocks = blocks;
553                                 floppy->block_size = length;
554                                 floppy->bs_factor = length / 512;
555                                 if (floppy->bs_factor != 1)
556                                         printk(KERN_NOTICE "%s: warning: non "
557                                                 "512 bytes block size not "
558                                                 "fully supported\n",
559                                                 drive->name);
560                                 rc = 0;
561                         }
562                         break;
563                 case CAPACITY_NO_CARTRIDGE:
564                         /*
565                          * This is a KERN_ERR so it appears on screen
566                          * for the user to see
567                          */
568                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
569                         break;
570                 case CAPACITY_INVALID:
571                         printk(KERN_ERR "%s: Invalid capacity for disk "
572                                 "in drive\n", drive->name);
573                         break;
574                 }
575                 debug_log("Descriptor 0 Code: %d\n",
576                           pc.buf[desc_start + 4] & 0x03);
577         }
578
579         /* Clik! disk does not support get_flexible_disk_page */
580         if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE))
581                 (void) ide_floppy_get_flexible_disk_page(drive);
582
583         set_capacity(disk, floppy->blocks * floppy->bs_factor);
584
585         return rc;
586 }
587
588 static sector_t idefloppy_capacity(ide_drive_t *drive)
589 {
590         idefloppy_floppy_t *floppy = drive->driver_data;
591         unsigned long capacity = floppy->blocks * floppy->bs_factor;
592
593         return capacity;
594 }
595
596 #ifdef CONFIG_IDE_PROC_FS
597 ide_devset_rw_field(bios_cyl, bios_cyl);
598 ide_devset_rw_field(bios_head, bios_head);
599 ide_devset_rw_field(bios_sect, bios_sect);
600
601 static int get_ticks(ide_drive_t *drive)
602 {
603         idefloppy_floppy_t *floppy = drive->driver_data;
604         return floppy->ticks;
605 }
606
607 static int set_ticks(ide_drive_t *drive, int arg)
608 {
609         idefloppy_floppy_t *floppy = drive->driver_data;
610         floppy->ticks = arg;
611         return 0;
612 }
613
614 IDE_DEVSET(ticks, DS_SYNC, get_ticks, set_ticks);
615
616 static const struct ide_proc_devset idefloppy_settings[] = {
617         IDE_PROC_DEVSET(bios_cyl,  0, 1023),
618         IDE_PROC_DEVSET(bios_head, 0,  255),
619         IDE_PROC_DEVSET(bios_sect, 0,   63),
620         IDE_PROC_DEVSET(ticks,     0,  255),
621         { 0 },
622 };
623 #endif
624
625 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
626 {
627         u16 *id = drive->id;
628         u8 gcw[2];
629
630         *((u16 *)&gcw) = id[ATA_ID_CONFIG];
631
632         drive->pc_callback       = ide_floppy_callback;
633         drive->pc_update_buffers = idefloppy_update_buffers;
634         drive->pc_io_buffers     = ide_io_buffers;
635
636         if (((gcw[0] & 0x60) >> 5) == 1)
637                 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
638         /*
639          * We used to check revisions here. At this point however I'm giving up.
640          * Just assume they are all broken, its easier.
641          *
642          * The actual reason for the workarounds was likely a driver bug after
643          * all rather than a firmware bug, and the workaround below used to hide
644          * it. It should be fixed as of version 1.9, but to be on the safe side
645          * we'll leave the limitation below for the 2.2.x tree.
646          */
647         if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) {
648                 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE;
649                 /* This value will be visible in the /proc/ide/hdx/settings */
650                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
651                 blk_queue_max_sectors(drive->queue, 64);
652         }
653
654         /*
655          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
656          * nasty clicking noises without it, so please don't remove this.
657          */
658         if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) {
659                 blk_queue_max_sectors(drive->queue, 64);
660                 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE;
661                 /* IOMEGA Clik! drives do not support lock/unlock commands */
662                 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK;
663         }
664
665         (void) ide_floppy_get_capacity(drive);
666
667         ide_proc_register_driver(drive, floppy->driver);
668 }
669
670 static void ide_floppy_remove(ide_drive_t *drive)
671 {
672         idefloppy_floppy_t *floppy = drive->driver_data;
673         struct gendisk *g = floppy->disk;
674
675         ide_proc_unregister_driver(drive, floppy->driver);
676
677         del_gendisk(g);
678
679         ide_floppy_put(floppy);
680 }
681
682 static void idefloppy_cleanup_obj(struct kref *kref)
683 {
684         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
685         ide_drive_t *drive = floppy->drive;
686         struct gendisk *g = floppy->disk;
687
688         drive->driver_data = NULL;
689         g->private_data = NULL;
690         put_disk(g);
691         kfree(floppy);
692 }
693
694 #ifdef CONFIG_IDE_PROC_FS
695 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
696                 int count, int *eof, void *data)
697 {
698         ide_drive_t*drive = (ide_drive_t *)data;
699         int len;
700
701         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
702         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
703 }
704
705 static ide_proc_entry_t idefloppy_proc[] = {
706         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
707         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
708         { NULL, 0, NULL, NULL }
709 };
710 #endif  /* CONFIG_IDE_PROC_FS */
711
712 static int ide_floppy_probe(ide_drive_t *);
713
714 static ide_driver_t idefloppy_driver = {
715         .gen_driver = {
716                 .owner          = THIS_MODULE,
717                 .name           = "ide-floppy",
718                 .bus            = &ide_bus_type,
719         },
720         .probe                  = ide_floppy_probe,
721         .remove                 = ide_floppy_remove,
722         .version                = IDEFLOPPY_VERSION,
723         .media                  = ide_floppy,
724         .do_request             = idefloppy_do_request,
725         .end_request            = idefloppy_end_request,
726         .error                  = __ide_error,
727 #ifdef CONFIG_IDE_PROC_FS
728         .proc                   = idefloppy_proc,
729         .settings               = idefloppy_settings,
730 #endif
731 };
732
733 static int idefloppy_open(struct inode *inode, struct file *filp)
734 {
735         struct gendisk *disk = inode->i_bdev->bd_disk;
736         struct ide_floppy_obj *floppy;
737         ide_drive_t *drive;
738         int ret = 0;
739
740         debug_log("Reached %s\n", __func__);
741
742         floppy = ide_floppy_get(disk);
743         if (!floppy)
744                 return -ENXIO;
745
746         drive = floppy->drive;
747
748         floppy->openers++;
749
750         if (floppy->openers == 1) {
751                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
752                 /* Just in case */
753
754                 if (ide_do_test_unit_ready(drive, disk))
755                         ide_do_start_stop(drive, disk, 1);
756
757                 if (ide_floppy_get_capacity(drive)
758                    && (filp->f_flags & O_NDELAY) == 0
759                     /*
760                      * Allow O_NDELAY to open a drive without a disk, or with an
761                      * unreadable disk, so that we can get the format capacity
762                      * of the drive or begin the format - Sam
763                      */
764                     ) {
765                         ret = -EIO;
766                         goto out_put_floppy;
767                 }
768
769                 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) {
770                         ret = -EROFS;
771                         goto out_put_floppy;
772                 }
773
774                 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED;
775                 ide_set_media_lock(drive, disk, 1);
776                 check_disk_change(inode->i_bdev);
777         } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) {
778                 ret = -EBUSY;
779                 goto out_put_floppy;
780         }
781         return 0;
782
783 out_put_floppy:
784         floppy->openers--;
785         ide_floppy_put(floppy);
786         return ret;
787 }
788
789 static int idefloppy_release(struct inode *inode, struct file *filp)
790 {
791         struct gendisk *disk = inode->i_bdev->bd_disk;
792         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
793         ide_drive_t *drive = floppy->drive;
794
795         debug_log("Reached %s\n", __func__);
796
797         if (floppy->openers == 1) {
798                 ide_set_media_lock(drive, disk, 0);
799                 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS;
800         }
801
802         floppy->openers--;
803
804         ide_floppy_put(floppy);
805
806         return 0;
807 }
808
809 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
810 {
811         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
812         ide_drive_t *drive = floppy->drive;
813
814         geo->heads = drive->bios_head;
815         geo->sectors = drive->bios_sect;
816         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
817         return 0;
818 }
819
820 static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc,
821                                unsigned long arg, unsigned int cmd)
822 {
823         idefloppy_floppy_t *floppy = drive->driver_data;
824         struct gendisk *disk = floppy->disk;
825         int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0;
826
827         if (floppy->openers > 1)
828                 return -EBUSY;
829
830         ide_set_media_lock(drive, disk, prevent);
831
832         if (cmd == CDROMEJECT)
833                 ide_do_start_stop(drive, disk, 2);
834
835         return 0;
836 }
837
838 static int idefloppy_ioctl(struct inode *inode, struct file *file,
839                         unsigned int cmd, unsigned long arg)
840 {
841         struct block_device *bdev = inode->i_bdev;
842         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
843         ide_drive_t *drive = floppy->drive;
844         struct ide_atapi_pc pc;
845         void __user *argp = (void __user *)arg;
846         int err;
847
848         if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR)
849                 return ide_floppy_lockdoor(drive, &pc, arg, cmd);
850
851         err = ide_floppy_format_ioctl(drive, file, cmd, argp);
852         if (err != -ENOTTY)
853                 return err;
854
855         /*
856          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
857          * and CDROM_SEND_PACKET (legacy) ioctls
858          */
859         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
860                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
861                                         bdev->bd_disk, cmd, argp);
862
863         if (err == -ENOTTY)
864                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
865
866         return err;
867 }
868
869 static int idefloppy_media_changed(struct gendisk *disk)
870 {
871         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
872         ide_drive_t *drive = floppy->drive;
873         int ret;
874
875         /* do not scan partitions twice if this is a removable device */
876         if (drive->attach) {
877                 drive->attach = 0;
878                 return 0;
879         }
880         ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED);
881         drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED;
882         return ret;
883 }
884
885 static int idefloppy_revalidate_disk(struct gendisk *disk)
886 {
887         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
888         set_capacity(disk, idefloppy_capacity(floppy->drive));
889         return 0;
890 }
891
892 static struct block_device_operations idefloppy_ops = {
893         .owner                  = THIS_MODULE,
894         .open                   = idefloppy_open,
895         .release                = idefloppy_release,
896         .ioctl                  = idefloppy_ioctl,
897         .getgeo                 = idefloppy_getgeo,
898         .media_changed          = idefloppy_media_changed,
899         .revalidate_disk        = idefloppy_revalidate_disk
900 };
901
902 static int ide_floppy_probe(ide_drive_t *drive)
903 {
904         idefloppy_floppy_t *floppy;
905         struct gendisk *g;
906
907         if (!strstr("ide-floppy", drive->driver_req))
908                 goto failed;
909
910         if (drive->media != ide_floppy)
911                 goto failed;
912
913         if (!ide_check_atapi_device(drive, DRV_NAME)) {
914                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
915                                 " of ide-floppy\n", drive->name);
916                 goto failed;
917         }
918         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
919         if (!floppy) {
920                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
921                                 " structure\n", drive->name);
922                 goto failed;
923         }
924
925         g = alloc_disk(1 << PARTN_BITS);
926         if (!g)
927                 goto out_free_floppy;
928
929         ide_init_disk(g, drive);
930
931         kref_init(&floppy->kref);
932
933         floppy->drive = drive;
934         floppy->driver = &idefloppy_driver;
935         floppy->disk = g;
936
937         g->private_data = &floppy->driver;
938
939         drive->driver_data = floppy;
940
941         idefloppy_setup(drive, floppy);
942
943         g->minors = 1 << PARTN_BITS;
944         g->driverfs_dev = &drive->gendev;
945         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
946         g->fops = &idefloppy_ops;
947         drive->attach = 1;
948         add_disk(g);
949         return 0;
950
951 out_free_floppy:
952         kfree(floppy);
953 failed:
954         return -ENODEV;
955 }
956
957 static void __exit idefloppy_exit(void)
958 {
959         driver_unregister(&idefloppy_driver.gen_driver);
960 }
961
962 static int __init idefloppy_init(void)
963 {
964         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
965         return driver_register(&idefloppy_driver.gen_driver);
966 }
967
968 MODULE_ALIAS("ide:*m-floppy*");
969 MODULE_ALIAS("ide-floppy");
970 module_init(idefloppy_init);
971 module_exit(idefloppy_exit);
972 MODULE_LICENSE("GPL");
973 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
974