ide: always use ->OUTBSYNC method for executing commands
[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                 if (direction)
266                         ide_atapi_write_zeros(drive, bcount);
267                 else
268                         ide_atapi_discard_data(drive, bcount);
269         }
270 }
271
272 static void idefloppy_update_buffers(ide_drive_t *drive,
273                                 struct ide_atapi_pc *pc)
274 {
275         struct request *rq = pc->rq;
276         struct bio *bio = rq->bio;
277
278         while ((bio = rq->bio) != NULL)
279                 idefloppy_end_request(drive, 1, 0);
280 }
281
282 /*
283  * Generate a new packet command request in front of the request queue, before
284  * the current request so that it will be processed immediately, on the next
285  * pass through the driver.
286  */
287 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
288                 struct request *rq)
289 {
290         struct ide_floppy_obj *floppy = drive->driver_data;
291
292         ide_init_drive_cmd(rq);
293         rq->buffer = (char *) pc;
294         rq->cmd_type = REQ_TYPE_SPECIAL;
295         rq->rq_disk = floppy->disk;
296         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
297 }
298
299 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
300 {
301         idefloppy_floppy_t *floppy = drive->driver_data;
302
303         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
304                 floppy->pc_stack_index = 0;
305         return (&floppy->pc_stack[floppy->pc_stack_index++]);
306 }
307
308 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
309 {
310         idefloppy_floppy_t *floppy = drive->driver_data;
311
312         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
313                 floppy->rq_stack_index = 0;
314         return (&floppy->rq_stack[floppy->rq_stack_index++]);
315 }
316
317 static void idefloppy_request_sense_callback(ide_drive_t *drive)
318 {
319         idefloppy_floppy_t *floppy = drive->driver_data;
320         u8 *buf = floppy->pc->buf;
321
322         debug_log("Reached %s\n", __func__);
323
324         if (!floppy->pc->error) {
325                 floppy->sense_key = buf[2] & 0x0F;
326                 floppy->asc = buf[12];
327                 floppy->ascq = buf[13];
328                 floppy->progress_indication = buf[15] & 0x80 ?
329                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
330
331                 if (floppy->failed_pc)
332                         debug_log("pc = %x, sense key = %x, asc = %x,"
333                                         " ascq = %x\n",
334                                         floppy->failed_pc->c[0],
335                                         floppy->sense_key,
336                                         floppy->asc,
337                                         floppy->ascq);
338                 else
339                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
340                                         floppy->sense_key,
341                                         floppy->asc,
342                                         floppy->ascq);
343
344
345                 idefloppy_end_request(drive, 1, 0);
346         } else {
347                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
348                                 " request!\n");
349                 idefloppy_end_request(drive, 0, 0);
350         }
351 }
352
353 /* General packet command callback function. */
354 static void idefloppy_pc_callback(ide_drive_t *drive)
355 {
356         idefloppy_floppy_t *floppy = drive->driver_data;
357
358         debug_log("Reached %s\n", __func__);
359
360         idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0);
361 }
362
363 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
364 {
365         memset(pc->c, 0, 12);
366         pc->retries = 0;
367         pc->flags = 0;
368         pc->req_xfer = 0;
369         pc->buf = pc->pc_buf;
370         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
371         pc->idefloppy_callback = &idefloppy_pc_callback;
372 }
373
374 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
375 {
376         idefloppy_init_pc(pc);
377         pc->c[0] = GPCMD_REQUEST_SENSE;
378         pc->c[4] = 255;
379         pc->req_xfer = 18;
380         pc->idefloppy_callback = &idefloppy_request_sense_callback;
381 }
382
383 /*
384  * Called when an error was detected during the last packet command. We queue a
385  * request sense packet command in the head of the request list.
386  */
387 static void idefloppy_retry_pc(ide_drive_t *drive)
388 {
389         struct ide_atapi_pc *pc;
390         struct request *rq;
391
392         (void)ide_read_error(drive);
393         pc = idefloppy_next_pc_storage(drive);
394         rq = idefloppy_next_rq_storage(drive);
395         idefloppy_create_request_sense_cmd(pc);
396         idefloppy_queue_pc_head(drive, pc, rq);
397 }
398
399 /* The usual interrupt handler called during a packet command. */
400 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
401 {
402         idefloppy_floppy_t *floppy = drive->driver_data;
403         ide_hwif_t *hwif = drive->hwif;
404         struct ide_atapi_pc *pc = floppy->pc;
405         struct request *rq = pc->rq;
406         xfer_func_t *xferfunc;
407         unsigned int temp;
408         int dma_error = 0;
409         u16 bcount;
410         u8 stat, ireason;
411
412         debug_log("Reached %s interrupt handler\n", __func__);
413
414         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
415                 dma_error = hwif->dma_ops->dma_end(drive);
416                 if (dma_error) {
417                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
418                                         rq_data_dir(rq) ? "write" : "read");
419                         pc->flags |= PC_FLAG_DMA_ERROR;
420                 } else {
421                         pc->xferred = pc->req_xfer;
422                         idefloppy_update_buffers(drive, pc);
423                 }
424                 debug_log("DMA finished\n");
425         }
426
427         /* Clear the interrupt */
428         stat = ide_read_status(drive);
429
430         /* No more interrupts */
431         if ((stat & DRQ_STAT) == 0) {
432                 debug_log("Packet command completed, %d bytes transferred\n",
433                                 pc->xferred);
434                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
435
436                 local_irq_enable_in_hardirq();
437
438                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
439                         /* Error detected */
440                         debug_log("%s: I/O error\n", drive->name);
441                         rq->errors++;
442                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
443                                 printk(KERN_ERR "ide-floppy: I/O error in "
444                                         "request sense command\n");
445                                 return ide_do_reset(drive);
446                         }
447                         /* Retry operation */
448                         idefloppy_retry_pc(drive);
449                         /* queued, but not started */
450                         return ide_stopped;
451                 }
452                 pc->error = 0;
453                 if (floppy->failed_pc == pc)
454                         floppy->failed_pc = NULL;
455                 /* Command finished - Call the callback function */
456                 pc->idefloppy_callback(drive);
457                 return ide_stopped;
458         }
459
460         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
461                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
462                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
463                         "more interrupts in DMA mode\n");
464                 ide_dma_off(drive);
465                 return ide_do_reset(drive);
466         }
467
468         /* Get the number of bytes to transfer */
469         bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
470                   hwif->INB(hwif->io_ports.lbam_addr);
471         /* on this interrupt */
472         ireason = hwif->INB(hwif->io_ports.nsect_addr);
473
474         if (ireason & CD) {
475                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
476                 return ide_do_reset(drive);
477         }
478         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
479                 /* Hopefully, we will never get here */
480                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
481                                 (ireason & IO) ? "Write" : "Read");
482                 printk(KERN_ERR "but the floppy wants us to %s !\n",
483                                 (ireason & IO) ? "Read" : "Write");
484                 return ide_do_reset(drive);
485         }
486         if (!(pc->flags & PC_FLAG_WRITING)) {
487                 /* Reading - Check that we have enough space */
488                 temp = pc->xferred + bcount;
489                 if (temp > pc->req_xfer) {
490                         if (temp > pc->buf_size) {
491                                 printk(KERN_ERR "ide-floppy: The floppy wants "
492                                         "to send us more data than expected "
493                                         "- discarding data\n");
494                                 ide_atapi_discard_data(drive, bcount);
495
496                                 ide_set_handler(drive,
497                                                 &idefloppy_pc_intr,
498                                                 IDEFLOPPY_WAIT_CMD,
499                                                 NULL);
500                                 return ide_started;
501                         }
502                         debug_log("The floppy wants to send us more data than"
503                                         " expected - allowing transfer\n");
504                 }
505         }
506         if (pc->flags & PC_FLAG_WRITING)
507                 xferfunc = hwif->output_data;
508         else
509                 xferfunc = hwif->input_data;
510
511         if (pc->buf)
512                 xferfunc(drive, NULL, pc->cur_pos, bcount);
513         else
514                 ide_floppy_io_buffers(drive, pc, bcount,
515                                       !!(pc->flags & PC_FLAG_WRITING));
516
517         /* Update the current position */
518         pc->xferred += bcount;
519         pc->cur_pos += bcount;
520
521         /* And set the interrupt handler again */
522         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
523         return ide_started;
524 }
525
526 /*
527  * This is the original routine that did the packet transfer.
528  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
529  * for that drive below. The algorithm is chosen based on drive type
530  */
531 static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
532 {
533         ide_hwif_t *hwif = drive->hwif;
534         ide_startstop_t startstop;
535         idefloppy_floppy_t *floppy = drive->driver_data;
536         u8 ireason;
537
538         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
539                 printk(KERN_ERR "ide-floppy: Strange, packet command "
540                                 "initiated yet DRQ isn't asserted\n");
541                 return startstop;
542         }
543         ireason = hwif->INB(hwif->io_ports.nsect_addr);
544         if ((ireason & CD) == 0 || (ireason & IO)) {
545                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
546                                 "issuing a packet command\n");
547                 return ide_do_reset(drive);
548         }
549
550         /* Set the interrupt routine */
551         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
552
553         /* Send the actual packet */
554         hwif->output_data(drive, NULL, floppy->pc->c, 12);
555
556         return ide_started;
557 }
558
559
560 /*
561  * What we have here is a classic case of a top half / bottom half interrupt
562  * service routine. In interrupt mode, the device sends an interrupt to signal
563  * that it is ready to receive a packet. However, we need to delay about 2-3
564  * ticks before issuing the packet or we gets in trouble.
565  *
566  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
567  * In either case, when the device says it's ready for a packet, we schedule
568  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
569  */
570 static int idefloppy_transfer_pc2(ide_drive_t *drive)
571 {
572         idefloppy_floppy_t *floppy = drive->driver_data;
573
574         /* Send the actual packet */
575         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
576
577         /* Timeout for the packet command */
578         return IDEFLOPPY_WAIT_CMD;
579 }
580
581 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
582 {
583         ide_hwif_t *hwif = drive->hwif;
584         idefloppy_floppy_t *floppy = drive->driver_data;
585         ide_startstop_t startstop;
586         u8 ireason;
587
588         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
589                 printk(KERN_ERR "ide-floppy: Strange, packet command "
590                                 "initiated yet DRQ isn't asserted\n");
591                 return startstop;
592         }
593         ireason = hwif->INB(hwif->io_ports.nsect_addr);
594         if ((ireason & CD) == 0 || (ireason & IO)) {
595                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
596                                 "while issuing a packet command\n");
597                 return ide_do_reset(drive);
598         }
599         /*
600          * The following delay solves a problem with ATAPI Zip 100 drives
601          * where the Busy flag was apparently being deasserted before the
602          * unit was ready to receive data. This was happening on a
603          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
604          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
605          * used until after the packet is moved in about 50 msec.
606          */
607
608         ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
609                         &idefloppy_transfer_pc2);
610         return ide_started;
611 }
612
613 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
614                                     struct ide_atapi_pc *pc)
615 {
616         /* supress error messages resulting from Medium not present */
617         if (floppy->sense_key == 0x02 &&
618             floppy->asc       == 0x3a &&
619             floppy->ascq      == 0x00)
620                 return;
621
622         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
623                         "asc = %2x, ascq = %2x\n",
624                         floppy->drive->name, pc->c[0], floppy->sense_key,
625                         floppy->asc, floppy->ascq);
626
627 }
628
629 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
630                 struct ide_atapi_pc *pc)
631 {
632         idefloppy_floppy_t *floppy = drive->driver_data;
633         ide_hwif_t *hwif = drive->hwif;
634         ide_handler_t *pkt_xfer_routine;
635         u16 bcount;
636         u8 dma;
637
638         if (floppy->failed_pc == NULL &&
639             pc->c[0] != GPCMD_REQUEST_SENSE)
640                 floppy->failed_pc = pc;
641         /* Set the current packet command */
642         floppy->pc = pc;
643
644         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
645                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
646                         ide_floppy_report_error(floppy, pc);
647                 /* Giving up */
648                 pc->error = IDEFLOPPY_ERROR_GENERAL;
649
650                 floppy->failed_pc = NULL;
651                 pc->idefloppy_callback(drive);
652                 return ide_stopped;
653         }
654
655         debug_log("Retry number - %d\n", pc->retries);
656
657         pc->retries++;
658         /* We haven't transferred any data yet */
659         pc->xferred = 0;
660         pc->cur_pos = pc->buf;
661         bcount = min(pc->req_xfer, 63 * 1024);
662
663         if (pc->flags & PC_FLAG_DMA_ERROR) {
664                 pc->flags &= ~PC_FLAG_DMA_ERROR;
665                 ide_dma_off(drive);
666         }
667         dma = 0;
668
669         if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
670                 dma = !hwif->dma_ops->dma_setup(drive);
671
672         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
673                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
674
675         if (dma) {
676                 /* Begin DMA, if necessary */
677                 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
678                 hwif->dma_ops->dma_start(drive);
679         }
680
681         /* Can we transfer the packet when we get the interrupt or wait? */
682         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
683                 /* wait */
684                 pkt_xfer_routine = &idefloppy_transfer_pc1;
685         } else {
686                 /* immediate */
687                 pkt_xfer_routine = &idefloppy_transfer_pc;
688         }
689
690         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
691                 /* Issue the packet command */
692                 ide_execute_command(drive, WIN_PACKETCMD,
693                                 pkt_xfer_routine,
694                                 IDEFLOPPY_WAIT_CMD,
695                                 NULL);
696                 return ide_started;
697         } else {
698                 /* Issue the packet command */
699                 hwif->OUTBSYNC(drive, WIN_PACKETCMD,
700                                hwif->io_ports.command_addr);
701                 return (*pkt_xfer_routine) (drive);
702         }
703 }
704
705 static void idefloppy_rw_callback(ide_drive_t *drive)
706 {
707         debug_log("Reached %s\n", __func__);
708
709         idefloppy_end_request(drive, 1, 0);
710         return;
711 }
712
713 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
714 {
715         debug_log("creating prevent removal command, prevent = %d\n", prevent);
716
717         idefloppy_init_pc(pc);
718         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
719         pc->c[4] = prevent;
720 }
721
722 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
723 {
724         idefloppy_init_pc(pc);
725         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
726         pc->c[7] = 255;
727         pc->c[8] = 255;
728         pc->req_xfer = 255;
729 }
730
731 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
732                 int l, int flags)
733 {
734         idefloppy_init_pc(pc);
735         pc->c[0] = GPCMD_FORMAT_UNIT;
736         pc->c[1] = 0x17;
737
738         memset(pc->buf, 0, 12);
739         pc->buf[1] = 0xA2;
740         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
741
742         if (flags & 1)                          /* Verify bit on... */
743                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
744         pc->buf[3] = 8;
745
746         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
747         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
748         pc->buf_size = 12;
749         pc->flags |= PC_FLAG_WRITING;
750 }
751
752 /* A mode sense command is used to "sense" floppy parameters. */
753 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
754                 u8 page_code, u8 type)
755 {
756         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
757
758         idefloppy_init_pc(pc);
759         pc->c[0] = GPCMD_MODE_SENSE_10;
760         pc->c[1] = 0;
761         pc->c[2] = page_code + (type << 6);
762
763         switch (page_code) {
764         case IDEFLOPPY_CAPABILITIES_PAGE:
765                 length += 12;
766                 break;
767         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
768                 length += 32;
769                 break;
770         default:
771                 printk(KERN_ERR "ide-floppy: unsupported page code "
772                                 "in create_mode_sense_cmd\n");
773         }
774         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
775         pc->req_xfer = length;
776 }
777
778 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
779 {
780         idefloppy_init_pc(pc);
781         pc->c[0] = GPCMD_START_STOP_UNIT;
782         pc->c[4] = start;
783 }
784
785 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
786 {
787         idefloppy_init_pc(pc);
788         pc->c[0] = GPCMD_TEST_UNIT_READY;
789 }
790
791 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
792                                     struct ide_atapi_pc *pc, struct request *rq,
793                                     unsigned long sector)
794 {
795         int block = sector / floppy->bs_factor;
796         int blocks = rq->nr_sectors / floppy->bs_factor;
797         int cmd = rq_data_dir(rq);
798
799         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
800                 block, blocks);
801
802         idefloppy_init_pc(pc);
803         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
804         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
805         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
806
807         pc->idefloppy_callback = &idefloppy_rw_callback;
808         pc->rq = rq;
809         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
810         if (rq->cmd_flags & REQ_RW)
811                 pc->flags |= PC_FLAG_WRITING;
812         pc->buf = NULL;
813         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
814         pc->flags |= PC_FLAG_DMA_RECOMMENDED;
815 }
816
817 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
818                 struct ide_atapi_pc *pc, struct request *rq)
819 {
820         idefloppy_init_pc(pc);
821         pc->idefloppy_callback = &idefloppy_rw_callback;
822         memcpy(pc->c, rq->cmd, sizeof(pc->c));
823         pc->rq = rq;
824         pc->b_count = rq->data_len;
825         if (rq->data_len && rq_data_dir(rq) == WRITE)
826                 pc->flags |= PC_FLAG_WRITING;
827         pc->buf = rq->data;
828         if (rq->bio)
829                 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
830         /*
831          * possibly problematic, doesn't look like ide-floppy correctly
832          * handled scattered requests if dma fails...
833          */
834         pc->req_xfer = pc->buf_size = rq->data_len;
835 }
836
837 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
838                 struct request *rq, sector_t block_s)
839 {
840         idefloppy_floppy_t *floppy = drive->driver_data;
841         struct ide_atapi_pc *pc;
842         unsigned long block = (unsigned long)block_s;
843
844         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
845                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
846                         rq->cmd_type, rq->errors);
847         debug_log("sector: %ld, nr_sectors: %ld, "
848                         "current_nr_sectors: %d\n", (long)rq->sector,
849                         rq->nr_sectors, rq->current_nr_sectors);
850
851         if (rq->errors >= ERROR_MAX) {
852                 if (floppy->failed_pc)
853                         ide_floppy_report_error(floppy, floppy->failed_pc);
854                 else
855                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
856                                 drive->name);
857                 idefloppy_end_request(drive, 0, 0);
858                 return ide_stopped;
859         }
860         if (blk_fs_request(rq)) {
861                 if (((long)rq->sector % floppy->bs_factor) ||
862                     (rq->nr_sectors % floppy->bs_factor)) {
863                         printk(KERN_ERR "%s: unsupported r/w request size\n",
864                                         drive->name);
865                         idefloppy_end_request(drive, 0, 0);
866                         return ide_stopped;
867                 }
868                 pc = idefloppy_next_pc_storage(drive);
869                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
870         } else if (blk_special_request(rq)) {
871                 pc = (struct ide_atapi_pc *) rq->buffer;
872         } else if (blk_pc_request(rq)) {
873                 pc = idefloppy_next_pc_storage(drive);
874                 idefloppy_blockpc_cmd(floppy, pc, rq);
875         } else {
876                 blk_dump_rq_flags(rq,
877                         "ide-floppy: unsupported command in queue");
878                 idefloppy_end_request(drive, 0, 0);
879                 return ide_stopped;
880         }
881
882         pc->rq = rq;
883         return idefloppy_issue_pc(drive, pc);
884 }
885
886 /*
887  * Add a special packet command request to the tail of the request queue,
888  * and wait for it to be serviced.
889  */
890 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
891 {
892         struct ide_floppy_obj *floppy = drive->driver_data;
893         struct request rq;
894
895         ide_init_drive_cmd(&rq);
896         rq.buffer = (char *) pc;
897         rq.cmd_type = REQ_TYPE_SPECIAL;
898         rq.rq_disk = floppy->disk;
899
900         return ide_do_drive_cmd(drive, &rq, ide_wait);
901 }
902
903 /*
904  * Look at the flexible disk page parameters. We ignore the CHS capacity
905  * parameters and use the LBA parameters instead.
906  */
907 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
908 {
909         idefloppy_floppy_t *floppy = drive->driver_data;
910         struct ide_atapi_pc pc;
911         u8 *page;
912         int capacity, lba_capacity;
913         u16 transfer_rate, sector_size, cyls, rpm;
914         u8 heads, sectors;
915
916         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
917                                         MODE_SENSE_CURRENT);
918
919         if (idefloppy_queue_pc_tail(drive, &pc)) {
920                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
921                                 " parameters\n");
922                 return 1;
923         }
924         floppy->wp = !!(pc.buf[3] & 0x80);
925         set_disk_ro(floppy->disk, floppy->wp);
926         page = &pc.buf[8];
927
928         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
929         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
930         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
931         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
932         heads         = pc.buf[8 + 4];
933         sectors       = pc.buf[8 + 5];
934
935         capacity = cyls * heads * sectors * sector_size;
936
937         if (memcmp(page, &floppy->flexible_disk_page, 32))
938                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
939                                 "%d sector size, %d rpm\n",
940                                 drive->name, capacity / 1024, cyls, heads,
941                                 sectors, transfer_rate / 8, sector_size, rpm);
942
943         memcpy(&floppy->flexible_disk_page, page, 32);
944         drive->bios_cyl = cyls;
945         drive->bios_head = heads;
946         drive->bios_sect = sectors;
947         lba_capacity = floppy->blocks * floppy->block_size;
948
949         if (capacity < lba_capacity) {
950                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
951                         "bytes, but the drive only handles %d\n",
952                         drive->name, lba_capacity, capacity);
953                 floppy->blocks = floppy->block_size ?
954                         capacity / floppy->block_size : 0;
955         }
956         return 0;
957 }
958
959 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
960 {
961         idefloppy_floppy_t *floppy = drive->driver_data;
962         struct ide_atapi_pc pc;
963
964         floppy->srfp = 0;
965         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
966                                                  MODE_SENSE_CURRENT);
967
968         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
969         if (idefloppy_queue_pc_tail(drive, &pc))
970                 return 1;
971
972         floppy->srfp = pc.buf[8 + 2] & 0x40;
973         return (0);
974 }
975
976 /*
977  * Determine if a media is present in the floppy drive, and if so, its LBA
978  * capacity.
979  */
980 static int ide_floppy_get_capacity(ide_drive_t *drive)
981 {
982         idefloppy_floppy_t *floppy = drive->driver_data;
983         struct ide_atapi_pc pc;
984         u8 *cap_desc;
985         u8 header_len, desc_cnt;
986         int i, rc = 1, blocks, length;
987
988         drive->bios_cyl = 0;
989         drive->bios_head = drive->bios_sect = 0;
990         floppy->blocks = 0;
991         floppy->bs_factor = 1;
992         set_capacity(floppy->disk, 0);
993
994         idefloppy_create_read_capacity_cmd(&pc);
995         if (idefloppy_queue_pc_tail(drive, &pc)) {
996                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
997                 return 1;
998         }
999         header_len = pc.buf[3];
1000         cap_desc = &pc.buf[4];
1001         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1002
1003         for (i = 0; i < desc_cnt; i++) {
1004                 unsigned int desc_start = 4 + i*8;
1005
1006                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1007                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1008
1009                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1010                                 i, blocks * length / 1024, blocks, length);
1011
1012                 if (i)
1013                         continue;
1014                 /*
1015                  * the code below is valid only for the 1st descriptor, ie i=0
1016                  */
1017
1018                 switch (pc.buf[desc_start + 4] & 0x03) {
1019                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1020                 case CAPACITY_UNFORMATTED:
1021                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1022                                 /*
1023                                  * If it is not a clik drive, break out
1024                                  * (maintains previous driver behaviour)
1025                                  */
1026                                 break;
1027                 case CAPACITY_CURRENT:
1028                         /* Normal Zip/LS-120 disks */
1029                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1030                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1031                                         "sector size\n", drive->name,
1032                                         blocks * length / 1024, blocks, length);
1033                         memcpy(&floppy->cap_desc, cap_desc, 8);
1034
1035                         if (!length || length % 512) {
1036                                 printk(KERN_NOTICE "%s: %d bytes block size "
1037                                         "not supported\n", drive->name, length);
1038                         } else {
1039                                 floppy->blocks = blocks;
1040                                 floppy->block_size = length;
1041                                 floppy->bs_factor = length / 512;
1042                                 if (floppy->bs_factor != 1)
1043                                         printk(KERN_NOTICE "%s: warning: non "
1044                                                 "512 bytes block size not "
1045                                                 "fully supported\n",
1046                                                 drive->name);
1047                                 rc = 0;
1048                         }
1049                         break;
1050                 case CAPACITY_NO_CARTRIDGE:
1051                         /*
1052                          * This is a KERN_ERR so it appears on screen
1053                          * for the user to see
1054                          */
1055                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1056                         break;
1057                 case CAPACITY_INVALID:
1058                         printk(KERN_ERR "%s: Invalid capacity for disk "
1059                                 "in drive\n", drive->name);
1060                         break;
1061                 }
1062                 debug_log("Descriptor 0 Code: %d\n",
1063                           pc.buf[desc_start + 4] & 0x03);
1064         }
1065
1066         /* Clik! disk does not support get_flexible_disk_page */
1067         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1068                 (void) ide_floppy_get_flexible_disk_page(drive);
1069
1070         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1071         return rc;
1072 }
1073
1074 /*
1075  * Obtain the list of formattable capacities.
1076  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1077  * descriptors to userland, instead of our own structures.
1078  *
1079  * Userland gives us the following structure:
1080  *
1081  * struct idefloppy_format_capacities {
1082  *      int nformats;
1083  *      struct {
1084  *              int nblocks;
1085  *              int blocksize;
1086  *      } formats[];
1087  * };
1088  *
1089  * userland initializes nformats to the number of allocated formats[] records.
1090  * On exit we set nformats to the number of records we've actually initialized.
1091  */
1092
1093 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1094 {
1095         struct ide_atapi_pc pc;
1096         u8 header_len, desc_cnt;
1097         int i, blocks, length, u_array_size, u_index;
1098         int __user *argp;
1099
1100         if (get_user(u_array_size, arg))
1101                 return (-EFAULT);
1102
1103         if (u_array_size <= 0)
1104                 return (-EINVAL);
1105
1106         idefloppy_create_read_capacity_cmd(&pc);
1107         if (idefloppy_queue_pc_tail(drive, &pc)) {
1108                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1109                 return (-EIO);
1110         }
1111         header_len = pc.buf[3];
1112         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1113
1114         u_index = 0;
1115         argp = arg + 1;
1116
1117         /*
1118          * We always skip the first capacity descriptor.  That's the current
1119          * capacity.  We are interested in the remaining descriptors, the
1120          * formattable capacities.
1121          */
1122         for (i = 1; i < desc_cnt; i++) {
1123                 unsigned int desc_start = 4 + i*8;
1124
1125                 if (u_index >= u_array_size)
1126                         break;  /* User-supplied buffer too small */
1127
1128                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1129                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1130
1131                 if (put_user(blocks, argp))
1132                         return(-EFAULT);
1133                 ++argp;
1134
1135                 if (put_user(length, argp))
1136                         return (-EFAULT);
1137                 ++argp;
1138
1139                 ++u_index;
1140         }
1141
1142         if (put_user(u_index, arg))
1143                 return (-EFAULT);
1144         return (0);
1145 }
1146
1147 /*
1148  * Get ATAPI_FORMAT_UNIT progress indication.
1149  *
1150  * Userland gives a pointer to an int.  The int is set to a progress
1151  * indicator 0-65536, with 65536=100%.
1152  *
1153  * If the drive does not support format progress indication, we just check
1154  * the dsc bit, and return either 0 or 65536.
1155  */
1156
1157 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1158 {
1159         idefloppy_floppy_t *floppy = drive->driver_data;
1160         struct ide_atapi_pc pc;
1161         int progress_indication = 0x10000;
1162
1163         if (floppy->srfp) {
1164                 idefloppy_create_request_sense_cmd(&pc);
1165                 if (idefloppy_queue_pc_tail(drive, &pc))
1166                         return (-EIO);
1167
1168                 if (floppy->sense_key == 2 &&
1169                     floppy->asc == 4 &&
1170                     floppy->ascq == 4)
1171                         progress_indication = floppy->progress_indication;
1172
1173                 /* Else assume format_unit has finished, and we're at 0x10000 */
1174         } else {
1175                 unsigned long flags;
1176                 u8 stat;
1177
1178                 local_irq_save(flags);
1179                 stat = ide_read_status(drive);
1180                 local_irq_restore(flags);
1181
1182                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1183         }
1184         if (put_user(progress_indication, arg))
1185                 return (-EFAULT);
1186
1187         return (0);
1188 }
1189
1190 static sector_t idefloppy_capacity(ide_drive_t *drive)
1191 {
1192         idefloppy_floppy_t *floppy = drive->driver_data;
1193         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1194
1195         return capacity;
1196 }
1197
1198 /*
1199  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1200  * results.
1201  */
1202 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1203 {
1204         u8 gcw[2];
1205         u8 device_type, protocol, removable, drq_type, packet_size;
1206
1207         *((u16 *) &gcw) = id->config;
1208
1209         device_type =  gcw[1] & 0x1F;
1210         removable   = (gcw[0] & 0x80) >> 7;
1211         protocol    = (gcw[1] & 0xC0) >> 6;
1212         drq_type    = (gcw[0] & 0x60) >> 5;
1213         packet_size =  gcw[0] & 0x03;
1214
1215 #ifdef CONFIG_PPC
1216         /* kludge for Apple PowerBook internal zip */
1217         if (device_type == 5 &&
1218             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1219                 device_type = 0;
1220 #endif
1221
1222         if (protocol != 2)
1223                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1224                         protocol);
1225         else if (device_type != 0)
1226                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1227                                 "to floppy\n", device_type);
1228         else if (!removable)
1229                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1230         else if (drq_type == 3)
1231                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1232                                 "supported\n", drq_type);
1233         else if (packet_size != 0)
1234                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1235                                 "bytes\n", packet_size);
1236         else
1237                 return 1;
1238         return 0;
1239 }
1240
1241 #ifdef CONFIG_IDE_PROC_FS
1242 static void idefloppy_add_settings(ide_drive_t *drive)
1243 {
1244         idefloppy_floppy_t *floppy = drive->driver_data;
1245
1246         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1247                         &drive->bios_cyl, NULL);
1248         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1249                         &drive->bios_head, NULL);
1250         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1251                         &drive->bios_sect, NULL);
1252         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1253                         &floppy->ticks,  NULL);
1254 }
1255 #else
1256 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1257 #endif
1258
1259 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1260 {
1261         u8 gcw[2];
1262
1263         *((u16 *) &gcw) = drive->id->config;
1264         floppy->pc = floppy->pc_stack;
1265
1266         if (((gcw[0] & 0x60) >> 5) == 1)
1267                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1268         /*
1269          * We used to check revisions here. At this point however I'm giving up.
1270          * Just assume they are all broken, its easier.
1271          *
1272          * The actual reason for the workarounds was likely a driver bug after
1273          * all rather than a firmware bug, and the workaround below used to hide
1274          * it. It should be fixed as of version 1.9, but to be on the safe side
1275          * we'll leave the limitation below for the 2.2.x tree.
1276          */
1277         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1278                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1279                 /* This value will be visible in the /proc/ide/hdx/settings */
1280                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1281                 blk_queue_max_sectors(drive->queue, 64);
1282         }
1283
1284         /*
1285          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1286          * nasty clicking noises without it, so please don't remove this.
1287          */
1288         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1289                 blk_queue_max_sectors(drive->queue, 64);
1290                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1291         }
1292
1293         (void) ide_floppy_get_capacity(drive);
1294         idefloppy_add_settings(drive);
1295 }
1296
1297 static void ide_floppy_remove(ide_drive_t *drive)
1298 {
1299         idefloppy_floppy_t *floppy = drive->driver_data;
1300         struct gendisk *g = floppy->disk;
1301
1302         ide_proc_unregister_driver(drive, floppy->driver);
1303
1304         del_gendisk(g);
1305
1306         ide_floppy_put(floppy);
1307 }
1308
1309 static void idefloppy_cleanup_obj(struct kref *kref)
1310 {
1311         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1312         ide_drive_t *drive = floppy->drive;
1313         struct gendisk *g = floppy->disk;
1314
1315         drive->driver_data = NULL;
1316         g->private_data = NULL;
1317         put_disk(g);
1318         kfree(floppy);
1319 }
1320
1321 #ifdef CONFIG_IDE_PROC_FS
1322 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1323                 int count, int *eof, void *data)
1324 {
1325         ide_drive_t*drive = (ide_drive_t *)data;
1326         int len;
1327
1328         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1329         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1330 }
1331
1332 static ide_proc_entry_t idefloppy_proc[] = {
1333         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1334         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1335         { NULL, 0, NULL, NULL }
1336 };
1337 #endif  /* CONFIG_IDE_PROC_FS */
1338
1339 static int ide_floppy_probe(ide_drive_t *);
1340
1341 static ide_driver_t idefloppy_driver = {
1342         .gen_driver = {
1343                 .owner          = THIS_MODULE,
1344                 .name           = "ide-floppy",
1345                 .bus            = &ide_bus_type,
1346         },
1347         .probe                  = ide_floppy_probe,
1348         .remove                 = ide_floppy_remove,
1349         .version                = IDEFLOPPY_VERSION,
1350         .media                  = ide_floppy,
1351         .supports_dsc_overlap   = 0,
1352         .do_request             = idefloppy_do_request,
1353         .end_request            = idefloppy_end_request,
1354         .error                  = __ide_error,
1355         .abort                  = __ide_abort,
1356 #ifdef CONFIG_IDE_PROC_FS
1357         .proc                   = idefloppy_proc,
1358 #endif
1359 };
1360
1361 static int idefloppy_open(struct inode *inode, struct file *filp)
1362 {
1363         struct gendisk *disk = inode->i_bdev->bd_disk;
1364         struct ide_floppy_obj *floppy;
1365         ide_drive_t *drive;
1366         struct ide_atapi_pc pc;
1367         int ret = 0;
1368
1369         debug_log("Reached %s\n", __func__);
1370
1371         floppy = ide_floppy_get(disk);
1372         if (!floppy)
1373                 return -ENXIO;
1374
1375         drive = floppy->drive;
1376
1377         floppy->openers++;
1378
1379         if (floppy->openers == 1) {
1380                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1381                 /* Just in case */
1382
1383                 idefloppy_create_test_unit_ready_cmd(&pc);
1384                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1385                         idefloppy_create_start_stop_cmd(&pc, 1);
1386                         (void) idefloppy_queue_pc_tail(drive, &pc);
1387                 }
1388
1389                 if (ide_floppy_get_capacity(drive)
1390                    && (filp->f_flags & O_NDELAY) == 0
1391                     /*
1392                      * Allow O_NDELAY to open a drive without a disk, or with an
1393                      * unreadable disk, so that we can get the format capacity
1394                      * of the drive or begin the format - Sam
1395                      */
1396                     ) {
1397                         ret = -EIO;
1398                         goto out_put_floppy;
1399                 }
1400
1401                 if (floppy->wp && (filp->f_mode & 2)) {
1402                         ret = -EROFS;
1403                         goto out_put_floppy;
1404                 }
1405                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1406                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1407                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1408                         idefloppy_create_prevent_cmd(&pc, 1);
1409                         (void) idefloppy_queue_pc_tail(drive, &pc);
1410                 }
1411                 check_disk_change(inode->i_bdev);
1412         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1413                 ret = -EBUSY;
1414                 goto out_put_floppy;
1415         }
1416         return 0;
1417
1418 out_put_floppy:
1419         floppy->openers--;
1420         ide_floppy_put(floppy);
1421         return ret;
1422 }
1423
1424 static int idefloppy_release(struct inode *inode, struct file *filp)
1425 {
1426         struct gendisk *disk = inode->i_bdev->bd_disk;
1427         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1428         ide_drive_t *drive = floppy->drive;
1429         struct ide_atapi_pc pc;
1430
1431         debug_log("Reached %s\n", __func__);
1432
1433         if (floppy->openers == 1) {
1434                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1435                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1436                         idefloppy_create_prevent_cmd(&pc, 0);
1437                         (void) idefloppy_queue_pc_tail(drive, &pc);
1438                 }
1439
1440                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1441         }
1442
1443         floppy->openers--;
1444
1445         ide_floppy_put(floppy);
1446
1447         return 0;
1448 }
1449
1450 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1451 {
1452         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1453         ide_drive_t *drive = floppy->drive;
1454
1455         geo->heads = drive->bios_head;
1456         geo->sectors = drive->bios_sect;
1457         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1458         return 0;
1459 }
1460
1461 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1462                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1463 {
1464         if (floppy->openers > 1)
1465                 return -EBUSY;
1466
1467         /* The IOMEGA Clik! Drive doesn't support this command -
1468          * no room for an eject mechanism */
1469         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1470                 int prevent = arg ? 1 : 0;
1471
1472                 if (cmd == CDROMEJECT)
1473                         prevent = 0;
1474
1475                 idefloppy_create_prevent_cmd(pc, prevent);
1476                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1477         }
1478
1479         if (cmd == CDROMEJECT) {
1480                 idefloppy_create_start_stop_cmd(pc, 2);
1481                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1482         }
1483
1484         return 0;
1485 }
1486
1487 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1488                                   int __user *arg)
1489 {
1490         int blocks, length, flags, err = 0;
1491         struct ide_atapi_pc pc;
1492
1493         if (floppy->openers > 1) {
1494                 /* Don't format if someone is using the disk */
1495                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1496                 return -EBUSY;
1497         }
1498
1499         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1500
1501         /*
1502          * Send ATAPI_FORMAT_UNIT to the drive.
1503          *
1504          * Userland gives us the following structure:
1505          *
1506          * struct idefloppy_format_command {
1507          *        int nblocks;
1508          *        int blocksize;
1509          *        int flags;
1510          *        } ;
1511          *
1512          * flags is a bitmask, currently, the only defined flag is:
1513          *
1514          *        0x01 - verify media after format.
1515          */
1516         if (get_user(blocks, arg) ||
1517                         get_user(length, arg+1) ||
1518                         get_user(flags, arg+2)) {
1519                 err = -EFAULT;
1520                 goto out;
1521         }
1522
1523         (void) idefloppy_get_sfrp_bit(floppy->drive);
1524         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1525
1526         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1527                 err = -EIO;
1528
1529 out:
1530         if (err)
1531                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1532         return err;
1533 }
1534
1535
1536 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1537                         unsigned int cmd, unsigned long arg)
1538 {
1539         struct block_device *bdev = inode->i_bdev;
1540         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1541         ide_drive_t *drive = floppy->drive;
1542         struct ide_atapi_pc pc;
1543         void __user *argp = (void __user *)arg;
1544         int err;
1545
1546         switch (cmd) {
1547         case CDROMEJECT:
1548                 /* fall through */
1549         case CDROM_LOCKDOOR:
1550                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1551         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1552                 return 0;
1553         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1554                 return ide_floppy_get_format_capacities(drive, argp);
1555         case IDEFLOPPY_IOCTL_FORMAT_START:
1556                 if (!(file->f_mode & 2))
1557                         return -EPERM;
1558
1559                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1560         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1561                 return idefloppy_get_format_progress(drive, argp);
1562         }
1563
1564         /*
1565          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1566          * and CDROM_SEND_PACKET (legacy) ioctls
1567          */
1568         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1569                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1570                                         bdev->bd_disk, cmd, argp);
1571         else
1572                 err = -ENOTTY;
1573
1574         if (err == -ENOTTY)
1575                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1576
1577         return err;
1578 }
1579
1580 static int idefloppy_media_changed(struct gendisk *disk)
1581 {
1582         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1583         ide_drive_t *drive = floppy->drive;
1584         int ret;
1585
1586         /* do not scan partitions twice if this is a removable device */
1587         if (drive->attach) {
1588                 drive->attach = 0;
1589                 return 0;
1590         }
1591         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1592         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1593         return ret;
1594 }
1595
1596 static int idefloppy_revalidate_disk(struct gendisk *disk)
1597 {
1598         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1599         set_capacity(disk, idefloppy_capacity(floppy->drive));
1600         return 0;
1601 }
1602
1603 static struct block_device_operations idefloppy_ops = {
1604         .owner                  = THIS_MODULE,
1605         .open                   = idefloppy_open,
1606         .release                = idefloppy_release,
1607         .ioctl                  = idefloppy_ioctl,
1608         .getgeo                 = idefloppy_getgeo,
1609         .media_changed          = idefloppy_media_changed,
1610         .revalidate_disk        = idefloppy_revalidate_disk
1611 };
1612
1613 static int ide_floppy_probe(ide_drive_t *drive)
1614 {
1615         idefloppy_floppy_t *floppy;
1616         struct gendisk *g;
1617
1618         if (!strstr("ide-floppy", drive->driver_req))
1619                 goto failed;
1620         if (!drive->present)
1621                 goto failed;
1622         if (drive->media != ide_floppy)
1623                 goto failed;
1624         if (!idefloppy_identify_device(drive, drive->id)) {
1625                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1626                                 " of ide-floppy\n", drive->name);
1627                 goto failed;
1628         }
1629         if (drive->scsi) {
1630                 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
1631                                 " emulation.\n", drive->name);
1632                 goto failed;
1633         }
1634         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1635         if (!floppy) {
1636                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1637                                 " structure\n", drive->name);
1638                 goto failed;
1639         }
1640
1641         g = alloc_disk(1 << PARTN_BITS);
1642         if (!g)
1643                 goto out_free_floppy;
1644
1645         ide_init_disk(g, drive);
1646
1647         ide_proc_register_driver(drive, &idefloppy_driver);
1648
1649         kref_init(&floppy->kref);
1650
1651         floppy->drive = drive;
1652         floppy->driver = &idefloppy_driver;
1653         floppy->disk = g;
1654
1655         g->private_data = &floppy->driver;
1656
1657         drive->driver_data = floppy;
1658
1659         idefloppy_setup(drive, floppy);
1660
1661         g->minors = 1 << PARTN_BITS;
1662         g->driverfs_dev = &drive->gendev;
1663         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1664         g->fops = &idefloppy_ops;
1665         drive->attach = 1;
1666         add_disk(g);
1667         return 0;
1668
1669 out_free_floppy:
1670         kfree(floppy);
1671 failed:
1672         return -ENODEV;
1673 }
1674
1675 static void __exit idefloppy_exit(void)
1676 {
1677         driver_unregister(&idefloppy_driver.gen_driver);
1678 }
1679
1680 static int __init idefloppy_init(void)
1681 {
1682         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1683         return driver_register(&idefloppy_driver.gen_driver);
1684 }
1685
1686 MODULE_ALIAS("ide:*m-floppy*");
1687 module_init(idefloppy_init);
1688 module_exit(idefloppy_exit);
1689 MODULE_LICENSE("GPL");
1690 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1691