Merge branch 'audit.b50' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit...
[linux-2.6] / drivers / ide / ide-floppy.c
1 /*
2  * IDE ATAPI floppy driver.
3  *
4  * Copyright (C) 1996-1999  Gadi Oxman <gadio@netvision.net.il>
5  * Copyright (C) 2000-2002  Paul Bristow <paul@paulbristow.net>
6  * Copyright (C) 2005       Bartlomiej Zolnierkiewicz
7  *
8  * This driver supports the following IDE floppy drives:
9  *
10  * LS-120/240 SuperDisk
11  * Iomega Zip 100/250
12  * Iomega PC Card Clik!/PocketZip
13  *
14  * For a historical changelog see
15  * Documentation/ide/ChangeLog.ide-floppy.1996-2002
16  */
17
18 #define IDEFLOPPY_VERSION "1.00"
19
20 #include <linux/module.h>
21 #include <linux/types.h>
22 #include <linux/string.h>
23 #include <linux/kernel.h>
24 #include <linux/delay.h>
25 #include <linux/timer.h>
26 #include <linux/mm.h>
27 #include <linux/interrupt.h>
28 #include <linux/major.h>
29 #include <linux/errno.h>
30 #include <linux/genhd.h>
31 #include <linux/slab.h>
32 #include <linux/cdrom.h>
33 #include <linux/ide.h>
34 #include <linux/bitops.h>
35 #include <linux/mutex.h>
36
37 #include <scsi/scsi_ioctl.h>
38
39 #include <asm/byteorder.h>
40 #include <linux/irq.h>
41 #include <linux/uaccess.h>
42 #include <linux/io.h>
43 #include <asm/unaligned.h>
44
45 /* define to see debug info */
46 #define IDEFLOPPY_DEBUG_LOG             0
47
48 /* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */
49 #define IDEFLOPPY_DEBUG(fmt, args...)
50
51 #if IDEFLOPPY_DEBUG_LOG
52 #define debug_log(fmt, args...) \
53         printk(KERN_INFO "ide-floppy: " fmt, ## args)
54 #else
55 #define debug_log(fmt, args...) do {} while (0)
56 #endif
57
58
59 /* Some drives require a longer irq timeout. */
60 #define IDEFLOPPY_WAIT_CMD              (5 * WAIT_CMD)
61
62 /*
63  * After each failed packet command we issue a request sense command and retry
64  * the packet command IDEFLOPPY_MAX_PC_RETRIES times.
65  */
66 #define IDEFLOPPY_MAX_PC_RETRIES        3
67
68 /*
69  * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE
70  * bytes.
71  */
72 #define IDEFLOPPY_PC_BUFFER_SIZE        256
73
74 /*
75  * In various places in the driver, we need to allocate storage for packet
76  * commands and requests, which will remain valid while we leave the driver to
77  * wait for an interrupt or a timeout event.
78  */
79 #define IDEFLOPPY_PC_STACK              (10 + IDEFLOPPY_MAX_PC_RETRIES)
80
81 /* format capacities descriptor codes */
82 #define CAPACITY_INVALID        0x00
83 #define CAPACITY_UNFORMATTED    0x01
84 #define CAPACITY_CURRENT        0x02
85 #define CAPACITY_NO_CARTRIDGE   0x03
86
87 /*
88  * Most of our global data which we need to save even as we leave the driver
89  * due to an interrupt or a timer event is stored in a variable of type
90  * idefloppy_floppy_t, defined below.
91  */
92 typedef struct ide_floppy_obj {
93         ide_drive_t     *drive;
94         ide_driver_t    *driver;
95         struct gendisk  *disk;
96         struct kref     kref;
97         unsigned int    openers;        /* protected by BKL for now */
98
99         /* Current packet command */
100         struct ide_atapi_pc *pc;
101         /* Last failed packet command */
102         struct ide_atapi_pc *failed_pc;
103         /* Packet command stack */
104         struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK];
105         /* Next free packet command storage space */
106         int pc_stack_index;
107         struct request rq_stack[IDEFLOPPY_PC_STACK];
108         /* We implement a circular array */
109         int rq_stack_index;
110
111         /* Last error information */
112         u8 sense_key, asc, ascq;
113         /* delay this long before sending packet command */
114         u8 ticks;
115         int progress_indication;
116
117         /* Device information */
118         /* Current format */
119         int blocks, block_size, bs_factor;
120         /* Last format capacity descriptor */
121         u8 cap_desc[8];
122         /* Copy of the flexible disk page */
123         u8 flexible_disk_page[32];
124         /* Write protect */
125         int wp;
126         /* Supports format progress report */
127         int srfp;
128         /* Status/Action flags */
129         unsigned long flags;
130 } idefloppy_floppy_t;
131
132 #define IDEFLOPPY_TICKS_DELAY   HZ/20   /* default delay for ZIP 100 (50ms) */
133
134 /* Floppy flag bits values. */
135 enum {
136         /* DRQ interrupt device */
137         IDEFLOPPY_FLAG_DRQ_INTERRUPT            = (1 << 0),
138         /* Media may have changed */
139         IDEFLOPPY_FLAG_MEDIA_CHANGED            = (1 << 1),
140         /* Format in progress */
141         IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS       = (1 << 2),
142         /* Avoid commands not supported in Clik drive */
143         IDEFLOPPY_FLAG_CLIK_DRIVE               = (1 << 3),
144         /* Requires BH algorithm for packets */
145         IDEFLOPPY_FLAG_ZIP_DRIVE                = (1 << 4),
146 };
147
148 /* Defines for the MODE SENSE command */
149 #define MODE_SENSE_CURRENT              0x00
150 #define MODE_SENSE_CHANGEABLE           0x01
151 #define MODE_SENSE_DEFAULT              0x02
152 #define MODE_SENSE_SAVED                0x03
153
154 /* IOCTLs used in low-level formatting. */
155 #define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED        0x4600
156 #define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY     0x4601
157 #define IDEFLOPPY_IOCTL_FORMAT_START            0x4602
158 #define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS     0x4603
159
160 /* Error code returned in rq->errors to the higher part of the driver. */
161 #define IDEFLOPPY_ERROR_GENERAL         101
162
163 /*
164  * Pages of the SELECT SENSE / MODE SENSE packet commands.
165  * See SFF-8070i spec.
166  */
167 #define IDEFLOPPY_CAPABILITIES_PAGE     0x1b
168 #define IDEFLOPPY_FLEXIBLE_DISK_PAGE    0x05
169
170 static DEFINE_MUTEX(idefloppy_ref_mutex);
171
172 #define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref)
173
174 #define ide_floppy_g(disk) \
175         container_of((disk)->private_data, struct ide_floppy_obj, driver)
176
177 static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
178 {
179         struct ide_floppy_obj *floppy = NULL;
180
181         mutex_lock(&idefloppy_ref_mutex);
182         floppy = ide_floppy_g(disk);
183         if (floppy)
184                 kref_get(&floppy->kref);
185         mutex_unlock(&idefloppy_ref_mutex);
186         return floppy;
187 }
188
189 static void idefloppy_cleanup_obj(struct kref *);
190
191 static void ide_floppy_put(struct ide_floppy_obj *floppy)
192 {
193         mutex_lock(&idefloppy_ref_mutex);
194         kref_put(&floppy->kref, idefloppy_cleanup_obj);
195         mutex_unlock(&idefloppy_ref_mutex);
196 }
197
198 /*
199  * Used to finish servicing a request. For read/write requests, we will call
200  * ide_end_request to pass to the next buffer.
201  */
202 static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs)
203 {
204         idefloppy_floppy_t *floppy = drive->driver_data;
205         struct request *rq = HWGROUP(drive)->rq;
206         int error;
207
208         debug_log("Reached %s\n", __func__);
209
210         switch (uptodate) {
211         case 0: error = IDEFLOPPY_ERROR_GENERAL; break;
212         case 1: error = 0; break;
213         default: error = uptodate;
214         }
215         if (error)
216                 floppy->failed_pc = NULL;
217         /* Why does this happen? */
218         if (!rq)
219                 return 0;
220         if (!blk_special_request(rq)) {
221                 /* our real local end request function */
222                 ide_end_request(drive, uptodate, nsecs);
223                 return 0;
224         }
225         rq->errors = error;
226         /* fixme: need to move this local also */
227         ide_end_drive_cmd(drive, 0, 0);
228         return 0;
229 }
230
231 static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc,
232                                   unsigned int bcount, int direction)
233 {
234         ide_hwif_t *hwif = drive->hwif;
235         struct request *rq = pc->rq;
236         struct req_iterator iter;
237         struct bio_vec *bvec;
238         unsigned long flags;
239         int count, done = 0;
240         char *data;
241
242         rq_for_each_segment(bvec, rq, iter) {
243                 if (!bcount)
244                         break;
245
246                 count = min(bvec->bv_len, bcount);
247
248                 data = bvec_kmap_irq(bvec, &flags);
249                 if (direction)
250                         hwif->output_data(drive, NULL, data, count);
251                 else
252                         hwif->input_data(drive, NULL, data, count);
253                 bvec_kunmap_irq(data, &flags);
254
255                 bcount -= count;
256                 pc->b_count += count;
257                 done += count;
258         }
259
260         idefloppy_end_request(drive, 1, done >> 9);
261
262         if (bcount) {
263                 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n",
264                                 drive->name, __func__, bcount);
265                 ide_pad_transfer(drive, direction, bcount);
266         }
267 }
268
269 static void idefloppy_update_buffers(ide_drive_t *drive,
270                                 struct ide_atapi_pc *pc)
271 {
272         struct request *rq = pc->rq;
273         struct bio *bio = rq->bio;
274
275         while ((bio = rq->bio) != NULL)
276                 idefloppy_end_request(drive, 1, 0);
277 }
278
279 /*
280  * Generate a new packet command request in front of the request queue, before
281  * the current request so that it will be processed immediately, on the next
282  * pass through the driver.
283  */
284 static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc,
285                 struct request *rq)
286 {
287         struct ide_floppy_obj *floppy = drive->driver_data;
288
289         ide_init_drive_cmd(rq);
290         rq->buffer = (char *) pc;
291         rq->cmd_type = REQ_TYPE_SPECIAL;
292         rq->rq_disk = floppy->disk;
293         (void) ide_do_drive_cmd(drive, rq, ide_preempt);
294 }
295
296 static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive)
297 {
298         idefloppy_floppy_t *floppy = drive->driver_data;
299
300         if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK)
301                 floppy->pc_stack_index = 0;
302         return (&floppy->pc_stack[floppy->pc_stack_index++]);
303 }
304
305 static struct request *idefloppy_next_rq_storage(ide_drive_t *drive)
306 {
307         idefloppy_floppy_t *floppy = drive->driver_data;
308
309         if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK)
310                 floppy->rq_stack_index = 0;
311         return (&floppy->rq_stack[floppy->rq_stack_index++]);
312 }
313
314 static void idefloppy_request_sense_callback(ide_drive_t *drive)
315 {
316         idefloppy_floppy_t *floppy = drive->driver_data;
317         u8 *buf = floppy->pc->buf;
318
319         debug_log("Reached %s\n", __func__);
320
321         if (!floppy->pc->error) {
322                 floppy->sense_key = buf[2] & 0x0F;
323                 floppy->asc = buf[12];
324                 floppy->ascq = buf[13];
325                 floppy->progress_indication = buf[15] & 0x80 ?
326                         (u16)get_unaligned((u16 *)&buf[16]) : 0x10000;
327
328                 if (floppy->failed_pc)
329                         debug_log("pc = %x, sense key = %x, asc = %x,"
330                                         " ascq = %x\n",
331                                         floppy->failed_pc->c[0],
332                                         floppy->sense_key,
333                                         floppy->asc,
334                                         floppy->ascq);
335                 else
336                         debug_log("sense key = %x, asc = %x, ascq = %x\n",
337                                         floppy->sense_key,
338                                         floppy->asc,
339                                         floppy->ascq);
340
341
342                 idefloppy_end_request(drive, 1, 0);
343         } else {
344                 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting"
345                                 " request!\n");
346                 idefloppy_end_request(drive, 0, 0);
347         }
348 }
349
350 /* General packet command callback function. */
351 static void idefloppy_pc_callback(ide_drive_t *drive)
352 {
353         idefloppy_floppy_t *floppy = drive->driver_data;
354
355         debug_log("Reached %s\n", __func__);
356
357         idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0);
358 }
359
360 static void idefloppy_init_pc(struct ide_atapi_pc *pc)
361 {
362         memset(pc->c, 0, 12);
363         pc->retries = 0;
364         pc->flags = 0;
365         pc->req_xfer = 0;
366         pc->buf = pc->pc_buf;
367         pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE;
368         pc->idefloppy_callback = &idefloppy_pc_callback;
369 }
370
371 static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc)
372 {
373         idefloppy_init_pc(pc);
374         pc->c[0] = GPCMD_REQUEST_SENSE;
375         pc->c[4] = 255;
376         pc->req_xfer = 18;
377         pc->idefloppy_callback = &idefloppy_request_sense_callback;
378 }
379
380 /*
381  * Called when an error was detected during the last packet command. We queue a
382  * request sense packet command in the head of the request list.
383  */
384 static void idefloppy_retry_pc(ide_drive_t *drive)
385 {
386         struct ide_atapi_pc *pc;
387         struct request *rq;
388
389         (void)ide_read_error(drive);
390         pc = idefloppy_next_pc_storage(drive);
391         rq = idefloppy_next_rq_storage(drive);
392         idefloppy_create_request_sense_cmd(pc);
393         idefloppy_queue_pc_head(drive, pc, rq);
394 }
395
396 /* The usual interrupt handler called during a packet command. */
397 static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive)
398 {
399         idefloppy_floppy_t *floppy = drive->driver_data;
400         ide_hwif_t *hwif = drive->hwif;
401         struct ide_atapi_pc *pc = floppy->pc;
402         struct request *rq = pc->rq;
403         xfer_func_t *xferfunc;
404         unsigned int temp;
405         int dma_error = 0;
406         u16 bcount;
407         u8 stat, ireason;
408
409         debug_log("Reached %s interrupt handler\n", __func__);
410
411         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
412                 dma_error = hwif->dma_ops->dma_end(drive);
413                 if (dma_error) {
414                         printk(KERN_ERR "%s: DMA %s error\n", drive->name,
415                                         rq_data_dir(rq) ? "write" : "read");
416                         pc->flags |= PC_FLAG_DMA_ERROR;
417                 } else {
418                         pc->xferred = pc->req_xfer;
419                         idefloppy_update_buffers(drive, pc);
420                 }
421                 debug_log("DMA finished\n");
422         }
423
424         /* Clear the interrupt */
425         stat = ide_read_status(drive);
426
427         /* No more interrupts */
428         if ((stat & DRQ_STAT) == 0) {
429                 debug_log("Packet command completed, %d bytes transferred\n",
430                                 pc->xferred);
431                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
432
433                 local_irq_enable_in_hardirq();
434
435                 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) {
436                         /* Error detected */
437                         debug_log("%s: I/O error\n", drive->name);
438                         rq->errors++;
439                         if (pc->c[0] == GPCMD_REQUEST_SENSE) {
440                                 printk(KERN_ERR "ide-floppy: I/O error in "
441                                         "request sense command\n");
442                                 return ide_do_reset(drive);
443                         }
444                         /* Retry operation */
445                         idefloppy_retry_pc(drive);
446                         /* queued, but not started */
447                         return ide_stopped;
448                 }
449                 pc->error = 0;
450                 if (floppy->failed_pc == pc)
451                         floppy->failed_pc = NULL;
452                 /* Command finished - Call the callback function */
453                 pc->idefloppy_callback(drive);
454                 return ide_stopped;
455         }
456
457         if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
458                 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS;
459                 printk(KERN_ERR "ide-floppy: The floppy wants to issue "
460                         "more interrupts in DMA mode\n");
461                 ide_dma_off(drive);
462                 return ide_do_reset(drive);
463         }
464
465         /* Get the number of bytes to transfer */
466         bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) |
467                   hwif->INB(hwif->io_ports.lbam_addr);
468         /* on this interrupt */
469         ireason = hwif->INB(hwif->io_ports.nsect_addr);
470
471         if (ireason & CD) {
472                 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__);
473                 return ide_do_reset(drive);
474         }
475         if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) {
476                 /* Hopefully, we will never get here */
477                 printk(KERN_ERR "ide-floppy: We wanted to %s, ",
478                                 (ireason & IO) ? "Write" : "Read");
479                 printk(KERN_ERR "but the floppy wants us to %s !\n",
480                                 (ireason & IO) ? "Read" : "Write");
481                 return ide_do_reset(drive);
482         }
483         if (!(pc->flags & PC_FLAG_WRITING)) {
484                 /* Reading - Check that we have enough space */
485                 temp = pc->xferred + bcount;
486                 if (temp > pc->req_xfer) {
487                         if (temp > pc->buf_size) {
488                                 printk(KERN_ERR "ide-floppy: The floppy wants "
489                                         "to send us more data than expected "
490                                         "- discarding data\n");
491                                 ide_pad_transfer(drive, 0, bcount);
492
493                                 ide_set_handler(drive,
494                                                 &idefloppy_pc_intr,
495                                                 IDEFLOPPY_WAIT_CMD,
496                                                 NULL);
497                                 return ide_started;
498                         }
499                         debug_log("The floppy wants to send us more data than"
500                                         " expected - allowing transfer\n");
501                 }
502         }
503         if (pc->flags & PC_FLAG_WRITING)
504                 xferfunc = hwif->output_data;
505         else
506                 xferfunc = hwif->input_data;
507
508         if (pc->buf)
509                 xferfunc(drive, NULL, pc->cur_pos, bcount);
510         else
511                 ide_floppy_io_buffers(drive, pc, bcount,
512                                       !!(pc->flags & PC_FLAG_WRITING));
513
514         /* Update the current position */
515         pc->xferred += bcount;
516         pc->cur_pos += bcount;
517
518         /* And set the interrupt handler again */
519         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
520         return ide_started;
521 }
522
523 /*
524  * This is the original routine that did the packet transfer.
525  * It fails at high speeds on the Iomega ZIP drive, so there's a slower version
526  * for that drive below. The algorithm is chosen based on drive type
527  */
528 static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive)
529 {
530         ide_hwif_t *hwif = drive->hwif;
531         ide_startstop_t startstop;
532         idefloppy_floppy_t *floppy = drive->driver_data;
533         u8 ireason;
534
535         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
536                 printk(KERN_ERR "ide-floppy: Strange, packet command "
537                                 "initiated yet DRQ isn't asserted\n");
538                 return startstop;
539         }
540         ireason = hwif->INB(hwif->io_ports.nsect_addr);
541         if ((ireason & CD) == 0 || (ireason & IO)) {
542                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while "
543                                 "issuing a packet command\n");
544                 return ide_do_reset(drive);
545         }
546
547         /* Set the interrupt routine */
548         ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL);
549
550         /* Send the actual packet */
551         hwif->output_data(drive, NULL, floppy->pc->c, 12);
552
553         return ide_started;
554 }
555
556
557 /*
558  * What we have here is a classic case of a top half / bottom half interrupt
559  * service routine. In interrupt mode, the device sends an interrupt to signal
560  * that it is ready to receive a packet. However, we need to delay about 2-3
561  * ticks before issuing the packet or we gets in trouble.
562  *
563  * So, follow carefully. transfer_pc1 is called as an interrupt (or directly).
564  * In either case, when the device says it's ready for a packet, we schedule
565  * the packet transfer to occur about 2-3 ticks later in transfer_pc2.
566  */
567 static int idefloppy_transfer_pc2(ide_drive_t *drive)
568 {
569         idefloppy_floppy_t *floppy = drive->driver_data;
570
571         /* Send the actual packet */
572         drive->hwif->output_data(drive, NULL, floppy->pc->c, 12);
573
574         /* Timeout for the packet command */
575         return IDEFLOPPY_WAIT_CMD;
576 }
577
578 static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive)
579 {
580         ide_hwif_t *hwif = drive->hwif;
581         idefloppy_floppy_t *floppy = drive->driver_data;
582         ide_startstop_t startstop;
583         u8 ireason;
584
585         if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) {
586                 printk(KERN_ERR "ide-floppy: Strange, packet command "
587                                 "initiated yet DRQ isn't asserted\n");
588                 return startstop;
589         }
590         ireason = hwif->INB(hwif->io_ports.nsect_addr);
591         if ((ireason & CD) == 0 || (ireason & IO)) {
592                 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) "
593                                 "while issuing a packet command\n");
594                 return ide_do_reset(drive);
595         }
596         /*
597          * The following delay solves a problem with ATAPI Zip 100 drives
598          * where the Busy flag was apparently being deasserted before the
599          * unit was ready to receive data. This was happening on a
600          * 1200 MHz Athlon system. 10/26/01 25msec is too short,
601          * 40 and 50msec work well. idefloppy_pc_intr will not be actually
602          * used until after the packet is moved in about 50 msec.
603          */
604
605         ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks,
606                         &idefloppy_transfer_pc2);
607         return ide_started;
608 }
609
610 static void ide_floppy_report_error(idefloppy_floppy_t *floppy,
611                                     struct ide_atapi_pc *pc)
612 {
613         /* supress error messages resulting from Medium not present */
614         if (floppy->sense_key == 0x02 &&
615             floppy->asc       == 0x3a &&
616             floppy->ascq      == 0x00)
617                 return;
618
619         printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, "
620                         "asc = %2x, ascq = %2x\n",
621                         floppy->drive->name, pc->c[0], floppy->sense_key,
622                         floppy->asc, floppy->ascq);
623
624 }
625
626 static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive,
627                 struct ide_atapi_pc *pc)
628 {
629         idefloppy_floppy_t *floppy = drive->driver_data;
630         ide_hwif_t *hwif = drive->hwif;
631         ide_handler_t *pkt_xfer_routine;
632         u16 bcount;
633         u8 dma;
634
635         if (floppy->failed_pc == NULL &&
636             pc->c[0] != GPCMD_REQUEST_SENSE)
637                 floppy->failed_pc = pc;
638         /* Set the current packet command */
639         floppy->pc = pc;
640
641         if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) {
642                 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR))
643                         ide_floppy_report_error(floppy, pc);
644                 /* Giving up */
645                 pc->error = IDEFLOPPY_ERROR_GENERAL;
646
647                 floppy->failed_pc = NULL;
648                 pc->idefloppy_callback(drive);
649                 return ide_stopped;
650         }
651
652         debug_log("Retry number - %d\n", pc->retries);
653
654         pc->retries++;
655         /* We haven't transferred any data yet */
656         pc->xferred = 0;
657         pc->cur_pos = pc->buf;
658         bcount = min(pc->req_xfer, 63 * 1024);
659
660         if (pc->flags & PC_FLAG_DMA_ERROR) {
661                 pc->flags &= ~PC_FLAG_DMA_ERROR;
662                 ide_dma_off(drive);
663         }
664         dma = 0;
665
666         if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma)
667                 dma = !hwif->dma_ops->dma_setup(drive);
668
669         ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK |
670                            IDE_TFLAG_OUT_DEVICE, bcount, dma);
671
672         if (dma) {
673                 /* Begin DMA, if necessary */
674                 pc->flags |= PC_FLAG_DMA_IN_PROGRESS;
675                 hwif->dma_ops->dma_start(drive);
676         }
677
678         /* Can we transfer the packet when we get the interrupt or wait? */
679         if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) {
680                 /* wait */
681                 pkt_xfer_routine = &idefloppy_transfer_pc1;
682         } else {
683                 /* immediate */
684                 pkt_xfer_routine = &idefloppy_transfer_pc;
685         }
686
687         if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) {
688                 /* Issue the packet command */
689                 ide_execute_command(drive, WIN_PACKETCMD,
690                                 pkt_xfer_routine,
691                                 IDEFLOPPY_WAIT_CMD,
692                                 NULL);
693                 return ide_started;
694         } else {
695                 /* Issue the packet command */
696                 ide_execute_pkt_cmd(drive);
697                 return (*pkt_xfer_routine) (drive);
698         }
699 }
700
701 static void idefloppy_rw_callback(ide_drive_t *drive)
702 {
703         debug_log("Reached %s\n", __func__);
704
705         idefloppy_end_request(drive, 1, 0);
706         return;
707 }
708
709 static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent)
710 {
711         debug_log("creating prevent removal command, prevent = %d\n", prevent);
712
713         idefloppy_init_pc(pc);
714         pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
715         pc->c[4] = prevent;
716 }
717
718 static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc)
719 {
720         idefloppy_init_pc(pc);
721         pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES;
722         pc->c[7] = 255;
723         pc->c[8] = 255;
724         pc->req_xfer = 255;
725 }
726
727 static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b,
728                 int l, int flags)
729 {
730         idefloppy_init_pc(pc);
731         pc->c[0] = GPCMD_FORMAT_UNIT;
732         pc->c[1] = 0x17;
733
734         memset(pc->buf, 0, 12);
735         pc->buf[1] = 0xA2;
736         /* Default format list header, u8 1: FOV/DCRT/IMM bits set */
737
738         if (flags & 1)                          /* Verify bit on... */
739                 pc->buf[1] ^= 0x20;             /* ... turn off DCRT bit */
740         pc->buf[3] = 8;
741
742         put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4]));
743         put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8]));
744         pc->buf_size = 12;
745         pc->flags |= PC_FLAG_WRITING;
746 }
747
748 /* A mode sense command is used to "sense" floppy parameters. */
749 static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc,
750                 u8 page_code, u8 type)
751 {
752         u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */
753
754         idefloppy_init_pc(pc);
755         pc->c[0] = GPCMD_MODE_SENSE_10;
756         pc->c[1] = 0;
757         pc->c[2] = page_code + (type << 6);
758
759         switch (page_code) {
760         case IDEFLOPPY_CAPABILITIES_PAGE:
761                 length += 12;
762                 break;
763         case IDEFLOPPY_FLEXIBLE_DISK_PAGE:
764                 length += 32;
765                 break;
766         default:
767                 printk(KERN_ERR "ide-floppy: unsupported page code "
768                                 "in create_mode_sense_cmd\n");
769         }
770         put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]);
771         pc->req_xfer = length;
772 }
773
774 static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start)
775 {
776         idefloppy_init_pc(pc);
777         pc->c[0] = GPCMD_START_STOP_UNIT;
778         pc->c[4] = start;
779 }
780
781 static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc)
782 {
783         idefloppy_init_pc(pc);
784         pc->c[0] = GPCMD_TEST_UNIT_READY;
785 }
786
787 static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy,
788                                     struct ide_atapi_pc *pc, struct request *rq,
789                                     unsigned long sector)
790 {
791         int block = sector / floppy->bs_factor;
792         int blocks = rq->nr_sectors / floppy->bs_factor;
793         int cmd = rq_data_dir(rq);
794
795         debug_log("create_rw10_cmd: block == %d, blocks == %d\n",
796                 block, blocks);
797
798         idefloppy_init_pc(pc);
799         pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10;
800         put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]);
801         put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]);
802
803         pc->idefloppy_callback = &idefloppy_rw_callback;
804         pc->rq = rq;
805         pc->b_count = cmd == READ ? 0 : rq->bio->bi_size;
806         if (rq->cmd_flags & REQ_RW)
807                 pc->flags |= PC_FLAG_WRITING;
808         pc->buf = NULL;
809         pc->req_xfer = pc->buf_size = blocks * floppy->block_size;
810         pc->flags |= PC_FLAG_DMA_RECOMMENDED;
811 }
812
813 static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy,
814                 struct ide_atapi_pc *pc, struct request *rq)
815 {
816         idefloppy_init_pc(pc);
817         pc->idefloppy_callback = &idefloppy_rw_callback;
818         memcpy(pc->c, rq->cmd, sizeof(pc->c));
819         pc->rq = rq;
820         pc->b_count = rq->data_len;
821         if (rq->data_len && rq_data_dir(rq) == WRITE)
822                 pc->flags |= PC_FLAG_WRITING;
823         pc->buf = rq->data;
824         if (rq->bio)
825                 pc->flags |= PC_FLAG_DMA_RECOMMENDED;
826         /*
827          * possibly problematic, doesn't look like ide-floppy correctly
828          * handled scattered requests if dma fails...
829          */
830         pc->req_xfer = pc->buf_size = rq->data_len;
831 }
832
833 static ide_startstop_t idefloppy_do_request(ide_drive_t *drive,
834                 struct request *rq, sector_t block_s)
835 {
836         idefloppy_floppy_t *floppy = drive->driver_data;
837         struct ide_atapi_pc *pc;
838         unsigned long block = (unsigned long)block_s;
839
840         debug_log("dev: %s, cmd_type: %x, errors: %d\n",
841                         rq->rq_disk ? rq->rq_disk->disk_name : "?",
842                         rq->cmd_type, rq->errors);
843         debug_log("sector: %ld, nr_sectors: %ld, "
844                         "current_nr_sectors: %d\n", (long)rq->sector,
845                         rq->nr_sectors, rq->current_nr_sectors);
846
847         if (rq->errors >= ERROR_MAX) {
848                 if (floppy->failed_pc)
849                         ide_floppy_report_error(floppy, floppy->failed_pc);
850                 else
851                         printk(KERN_ERR "ide-floppy: %s: I/O error\n",
852                                 drive->name);
853                 idefloppy_end_request(drive, 0, 0);
854                 return ide_stopped;
855         }
856         if (blk_fs_request(rq)) {
857                 if (((long)rq->sector % floppy->bs_factor) ||
858                     (rq->nr_sectors % floppy->bs_factor)) {
859                         printk(KERN_ERR "%s: unsupported r/w request size\n",
860                                         drive->name);
861                         idefloppy_end_request(drive, 0, 0);
862                         return ide_stopped;
863                 }
864                 pc = idefloppy_next_pc_storage(drive);
865                 idefloppy_create_rw_cmd(floppy, pc, rq, block);
866         } else if (blk_special_request(rq)) {
867                 pc = (struct ide_atapi_pc *) rq->buffer;
868         } else if (blk_pc_request(rq)) {
869                 pc = idefloppy_next_pc_storage(drive);
870                 idefloppy_blockpc_cmd(floppy, pc, rq);
871         } else {
872                 blk_dump_rq_flags(rq,
873                         "ide-floppy: unsupported command in queue");
874                 idefloppy_end_request(drive, 0, 0);
875                 return ide_stopped;
876         }
877
878         pc->rq = rq;
879         return idefloppy_issue_pc(drive, pc);
880 }
881
882 /*
883  * Add a special packet command request to the tail of the request queue,
884  * and wait for it to be serviced.
885  */
886 static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc)
887 {
888         struct ide_floppy_obj *floppy = drive->driver_data;
889         struct request rq;
890
891         ide_init_drive_cmd(&rq);
892         rq.buffer = (char *) pc;
893         rq.cmd_type = REQ_TYPE_SPECIAL;
894         rq.rq_disk = floppy->disk;
895
896         return ide_do_drive_cmd(drive, &rq, ide_wait);
897 }
898
899 /*
900  * Look at the flexible disk page parameters. We ignore the CHS capacity
901  * parameters and use the LBA parameters instead.
902  */
903 static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive)
904 {
905         idefloppy_floppy_t *floppy = drive->driver_data;
906         struct ide_atapi_pc pc;
907         u8 *page;
908         int capacity, lba_capacity;
909         u16 transfer_rate, sector_size, cyls, rpm;
910         u8 heads, sectors;
911
912         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE,
913                                         MODE_SENSE_CURRENT);
914
915         if (idefloppy_queue_pc_tail(drive, &pc)) {
916                 printk(KERN_ERR "ide-floppy: Can't get flexible disk page"
917                                 " parameters\n");
918                 return 1;
919         }
920         floppy->wp = !!(pc.buf[3] & 0x80);
921         set_disk_ro(floppy->disk, floppy->wp);
922         page = &pc.buf[8];
923
924         transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]);
925         sector_size   = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]);
926         cyls          = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]);
927         rpm           = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]);
928         heads         = pc.buf[8 + 4];
929         sectors       = pc.buf[8 + 5];
930
931         capacity = cyls * heads * sectors * sector_size;
932
933         if (memcmp(page, &floppy->flexible_disk_page, 32))
934                 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, "
935                                 "%d sector size, %d rpm\n",
936                                 drive->name, capacity / 1024, cyls, heads,
937                                 sectors, transfer_rate / 8, sector_size, rpm);
938
939         memcpy(&floppy->flexible_disk_page, page, 32);
940         drive->bios_cyl = cyls;
941         drive->bios_head = heads;
942         drive->bios_sect = sectors;
943         lba_capacity = floppy->blocks * floppy->block_size;
944
945         if (capacity < lba_capacity) {
946                 printk(KERN_NOTICE "%s: The disk reports a capacity of %d "
947                         "bytes, but the drive only handles %d\n",
948                         drive->name, lba_capacity, capacity);
949                 floppy->blocks = floppy->block_size ?
950                         capacity / floppy->block_size : 0;
951         }
952         return 0;
953 }
954
955 static int idefloppy_get_sfrp_bit(ide_drive_t *drive)
956 {
957         idefloppy_floppy_t *floppy = drive->driver_data;
958         struct ide_atapi_pc pc;
959
960         floppy->srfp = 0;
961         idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE,
962                                                  MODE_SENSE_CURRENT);
963
964         pc.flags |= PC_FLAG_SUPPRESS_ERROR;
965         if (idefloppy_queue_pc_tail(drive, &pc))
966                 return 1;
967
968         floppy->srfp = pc.buf[8 + 2] & 0x40;
969         return (0);
970 }
971
972 /*
973  * Determine if a media is present in the floppy drive, and if so, its LBA
974  * capacity.
975  */
976 static int ide_floppy_get_capacity(ide_drive_t *drive)
977 {
978         idefloppy_floppy_t *floppy = drive->driver_data;
979         struct ide_atapi_pc pc;
980         u8 *cap_desc;
981         u8 header_len, desc_cnt;
982         int i, rc = 1, blocks, length;
983
984         drive->bios_cyl = 0;
985         drive->bios_head = drive->bios_sect = 0;
986         floppy->blocks = 0;
987         floppy->bs_factor = 1;
988         set_capacity(floppy->disk, 0);
989
990         idefloppy_create_read_capacity_cmd(&pc);
991         if (idefloppy_queue_pc_tail(drive, &pc)) {
992                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
993                 return 1;
994         }
995         header_len = pc.buf[3];
996         cap_desc = &pc.buf[4];
997         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
998
999         for (i = 0; i < desc_cnt; i++) {
1000                 unsigned int desc_start = 4 + i*8;
1001
1002                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1003                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1004
1005                 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n",
1006                                 i, blocks * length / 1024, blocks, length);
1007
1008                 if (i)
1009                         continue;
1010                 /*
1011                  * the code below is valid only for the 1st descriptor, ie i=0
1012                  */
1013
1014                 switch (pc.buf[desc_start + 4] & 0x03) {
1015                 /* Clik! drive returns this instead of CAPACITY_CURRENT */
1016                 case CAPACITY_UNFORMATTED:
1017                         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1018                                 /*
1019                                  * If it is not a clik drive, break out
1020                                  * (maintains previous driver behaviour)
1021                                  */
1022                                 break;
1023                 case CAPACITY_CURRENT:
1024                         /* Normal Zip/LS-120 disks */
1025                         if (memcmp(cap_desc, &floppy->cap_desc, 8))
1026                                 printk(KERN_INFO "%s: %dkB, %d blocks, %d "
1027                                         "sector size\n", drive->name,
1028                                         blocks * length / 1024, blocks, length);
1029                         memcpy(&floppy->cap_desc, cap_desc, 8);
1030
1031                         if (!length || length % 512) {
1032                                 printk(KERN_NOTICE "%s: %d bytes block size "
1033                                         "not supported\n", drive->name, length);
1034                         } else {
1035                                 floppy->blocks = blocks;
1036                                 floppy->block_size = length;
1037                                 floppy->bs_factor = length / 512;
1038                                 if (floppy->bs_factor != 1)
1039                                         printk(KERN_NOTICE "%s: warning: non "
1040                                                 "512 bytes block size not "
1041                                                 "fully supported\n",
1042                                                 drive->name);
1043                                 rc = 0;
1044                         }
1045                         break;
1046                 case CAPACITY_NO_CARTRIDGE:
1047                         /*
1048                          * This is a KERN_ERR so it appears on screen
1049                          * for the user to see
1050                          */
1051                         printk(KERN_ERR "%s: No disk in drive\n", drive->name);
1052                         break;
1053                 case CAPACITY_INVALID:
1054                         printk(KERN_ERR "%s: Invalid capacity for disk "
1055                                 "in drive\n", drive->name);
1056                         break;
1057                 }
1058                 debug_log("Descriptor 0 Code: %d\n",
1059                           pc.buf[desc_start + 4] & 0x03);
1060         }
1061
1062         /* Clik! disk does not support get_flexible_disk_page */
1063         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE))
1064                 (void) ide_floppy_get_flexible_disk_page(drive);
1065
1066         set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor);
1067         return rc;
1068 }
1069
1070 /*
1071  * Obtain the list of formattable capacities.
1072  * Very similar to ide_floppy_get_capacity, except that we push the capacity
1073  * descriptors to userland, instead of our own structures.
1074  *
1075  * Userland gives us the following structure:
1076  *
1077  * struct idefloppy_format_capacities {
1078  *      int nformats;
1079  *      struct {
1080  *              int nblocks;
1081  *              int blocksize;
1082  *      } formats[];
1083  * };
1084  *
1085  * userland initializes nformats to the number of allocated formats[] records.
1086  * On exit we set nformats to the number of records we've actually initialized.
1087  */
1088
1089 static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg)
1090 {
1091         struct ide_atapi_pc pc;
1092         u8 header_len, desc_cnt;
1093         int i, blocks, length, u_array_size, u_index;
1094         int __user *argp;
1095
1096         if (get_user(u_array_size, arg))
1097                 return (-EFAULT);
1098
1099         if (u_array_size <= 0)
1100                 return (-EINVAL);
1101
1102         idefloppy_create_read_capacity_cmd(&pc);
1103         if (idefloppy_queue_pc_tail(drive, &pc)) {
1104                 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n");
1105                 return (-EIO);
1106         }
1107         header_len = pc.buf[3];
1108         desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */
1109
1110         u_index = 0;
1111         argp = arg + 1;
1112
1113         /*
1114          * We always skip the first capacity descriptor.  That's the current
1115          * capacity.  We are interested in the remaining descriptors, the
1116          * formattable capacities.
1117          */
1118         for (i = 1; i < desc_cnt; i++) {
1119                 unsigned int desc_start = 4 + i*8;
1120
1121                 if (u_index >= u_array_size)
1122                         break;  /* User-supplied buffer too small */
1123
1124                 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]);
1125                 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]);
1126
1127                 if (put_user(blocks, argp))
1128                         return(-EFAULT);
1129                 ++argp;
1130
1131                 if (put_user(length, argp))
1132                         return (-EFAULT);
1133                 ++argp;
1134
1135                 ++u_index;
1136         }
1137
1138         if (put_user(u_index, arg))
1139                 return (-EFAULT);
1140         return (0);
1141 }
1142
1143 /*
1144  * Get ATAPI_FORMAT_UNIT progress indication.
1145  *
1146  * Userland gives a pointer to an int.  The int is set to a progress
1147  * indicator 0-65536, with 65536=100%.
1148  *
1149  * If the drive does not support format progress indication, we just check
1150  * the dsc bit, and return either 0 or 65536.
1151  */
1152
1153 static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg)
1154 {
1155         idefloppy_floppy_t *floppy = drive->driver_data;
1156         struct ide_atapi_pc pc;
1157         int progress_indication = 0x10000;
1158
1159         if (floppy->srfp) {
1160                 idefloppy_create_request_sense_cmd(&pc);
1161                 if (idefloppy_queue_pc_tail(drive, &pc))
1162                         return (-EIO);
1163
1164                 if (floppy->sense_key == 2 &&
1165                     floppy->asc == 4 &&
1166                     floppy->ascq == 4)
1167                         progress_indication = floppy->progress_indication;
1168
1169                 /* Else assume format_unit has finished, and we're at 0x10000 */
1170         } else {
1171                 unsigned long flags;
1172                 u8 stat;
1173
1174                 local_irq_save(flags);
1175                 stat = ide_read_status(drive);
1176                 local_irq_restore(flags);
1177
1178                 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000;
1179         }
1180         if (put_user(progress_indication, arg))
1181                 return (-EFAULT);
1182
1183         return (0);
1184 }
1185
1186 static sector_t idefloppy_capacity(ide_drive_t *drive)
1187 {
1188         idefloppy_floppy_t *floppy = drive->driver_data;
1189         unsigned long capacity = floppy->blocks * floppy->bs_factor;
1190
1191         return capacity;
1192 }
1193
1194 /*
1195  * Check whether we can support a drive, based on the ATAPI IDENTIFY command
1196  * results.
1197  */
1198 static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id)
1199 {
1200         u8 gcw[2];
1201         u8 device_type, protocol, removable, drq_type, packet_size;
1202
1203         *((u16 *) &gcw) = id->config;
1204
1205         device_type =  gcw[1] & 0x1F;
1206         removable   = (gcw[0] & 0x80) >> 7;
1207         protocol    = (gcw[1] & 0xC0) >> 6;
1208         drq_type    = (gcw[0] & 0x60) >> 5;
1209         packet_size =  gcw[0] & 0x03;
1210
1211 #ifdef CONFIG_PPC
1212         /* kludge for Apple PowerBook internal zip */
1213         if (device_type == 5 &&
1214             !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP"))
1215                 device_type = 0;
1216 #endif
1217
1218         if (protocol != 2)
1219                 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n",
1220                         protocol);
1221         else if (device_type != 0)
1222                 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set "
1223                                 "to floppy\n", device_type);
1224         else if (!removable)
1225                 printk(KERN_ERR "ide-floppy: The removable flag is not set\n");
1226         else if (drq_type == 3)
1227                 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not "
1228                                 "supported\n", drq_type);
1229         else if (packet_size != 0)
1230                 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 "
1231                                 "bytes\n", packet_size);
1232         else
1233                 return 1;
1234         return 0;
1235 }
1236
1237 #ifdef CONFIG_IDE_PROC_FS
1238 static void idefloppy_add_settings(ide_drive_t *drive)
1239 {
1240         idefloppy_floppy_t *floppy = drive->driver_data;
1241
1242         ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1,
1243                         &drive->bios_cyl, NULL);
1244         ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1245                         &drive->bios_head, NULL);
1246         ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0,  63, 1, 1,
1247                         &drive->bios_sect, NULL);
1248         ide_add_setting(drive, "ticks",    SETTING_RW, TYPE_BYTE, 0, 255, 1, 1,
1249                         &floppy->ticks,  NULL);
1250 }
1251 #else
1252 static inline void idefloppy_add_settings(ide_drive_t *drive) { ; }
1253 #endif
1254
1255 static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy)
1256 {
1257         u8 gcw[2];
1258
1259         *((u16 *) &gcw) = drive->id->config;
1260         floppy->pc = floppy->pc_stack;
1261
1262         if (((gcw[0] & 0x60) >> 5) == 1)
1263                 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT;
1264         /*
1265          * We used to check revisions here. At this point however I'm giving up.
1266          * Just assume they are all broken, its easier.
1267          *
1268          * The actual reason for the workarounds was likely a driver bug after
1269          * all rather than a firmware bug, and the workaround below used to hide
1270          * it. It should be fixed as of version 1.9, but to be on the safe side
1271          * we'll leave the limitation below for the 2.2.x tree.
1272          */
1273         if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) {
1274                 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE;
1275                 /* This value will be visible in the /proc/ide/hdx/settings */
1276                 floppy->ticks = IDEFLOPPY_TICKS_DELAY;
1277                 blk_queue_max_sectors(drive->queue, 64);
1278         }
1279
1280         /*
1281          * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes
1282          * nasty clicking noises without it, so please don't remove this.
1283          */
1284         if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) {
1285                 blk_queue_max_sectors(drive->queue, 64);
1286                 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE;
1287         }
1288
1289         (void) ide_floppy_get_capacity(drive);
1290         idefloppy_add_settings(drive);
1291 }
1292
1293 static void ide_floppy_remove(ide_drive_t *drive)
1294 {
1295         idefloppy_floppy_t *floppy = drive->driver_data;
1296         struct gendisk *g = floppy->disk;
1297
1298         ide_proc_unregister_driver(drive, floppy->driver);
1299
1300         del_gendisk(g);
1301
1302         ide_floppy_put(floppy);
1303 }
1304
1305 static void idefloppy_cleanup_obj(struct kref *kref)
1306 {
1307         struct ide_floppy_obj *floppy = to_ide_floppy(kref);
1308         ide_drive_t *drive = floppy->drive;
1309         struct gendisk *g = floppy->disk;
1310
1311         drive->driver_data = NULL;
1312         g->private_data = NULL;
1313         put_disk(g);
1314         kfree(floppy);
1315 }
1316
1317 #ifdef CONFIG_IDE_PROC_FS
1318 static int proc_idefloppy_read_capacity(char *page, char **start, off_t off,
1319                 int count, int *eof, void *data)
1320 {
1321         ide_drive_t*drive = (ide_drive_t *)data;
1322         int len;
1323
1324         len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive));
1325         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1326 }
1327
1328 static ide_proc_entry_t idefloppy_proc[] = {
1329         { "capacity",   S_IFREG|S_IRUGO, proc_idefloppy_read_capacity,  NULL },
1330         { "geometry",   S_IFREG|S_IRUGO, proc_ide_read_geometry,        NULL },
1331         { NULL, 0, NULL, NULL }
1332 };
1333 #endif  /* CONFIG_IDE_PROC_FS */
1334
1335 static int ide_floppy_probe(ide_drive_t *);
1336
1337 static ide_driver_t idefloppy_driver = {
1338         .gen_driver = {
1339                 .owner          = THIS_MODULE,
1340                 .name           = "ide-floppy",
1341                 .bus            = &ide_bus_type,
1342         },
1343         .probe                  = ide_floppy_probe,
1344         .remove                 = ide_floppy_remove,
1345         .version                = IDEFLOPPY_VERSION,
1346         .media                  = ide_floppy,
1347         .supports_dsc_overlap   = 0,
1348         .do_request             = idefloppy_do_request,
1349         .end_request            = idefloppy_end_request,
1350         .error                  = __ide_error,
1351         .abort                  = __ide_abort,
1352 #ifdef CONFIG_IDE_PROC_FS
1353         .proc                   = idefloppy_proc,
1354 #endif
1355 };
1356
1357 static int idefloppy_open(struct inode *inode, struct file *filp)
1358 {
1359         struct gendisk *disk = inode->i_bdev->bd_disk;
1360         struct ide_floppy_obj *floppy;
1361         ide_drive_t *drive;
1362         struct ide_atapi_pc pc;
1363         int ret = 0;
1364
1365         debug_log("Reached %s\n", __func__);
1366
1367         floppy = ide_floppy_get(disk);
1368         if (!floppy)
1369                 return -ENXIO;
1370
1371         drive = floppy->drive;
1372
1373         floppy->openers++;
1374
1375         if (floppy->openers == 1) {
1376                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1377                 /* Just in case */
1378
1379                 idefloppy_create_test_unit_ready_cmd(&pc);
1380                 if (idefloppy_queue_pc_tail(drive, &pc)) {
1381                         idefloppy_create_start_stop_cmd(&pc, 1);
1382                         (void) idefloppy_queue_pc_tail(drive, &pc);
1383                 }
1384
1385                 if (ide_floppy_get_capacity(drive)
1386                    && (filp->f_flags & O_NDELAY) == 0
1387                     /*
1388                      * Allow O_NDELAY to open a drive without a disk, or with an
1389                      * unreadable disk, so that we can get the format capacity
1390                      * of the drive or begin the format - Sam
1391                      */
1392                     ) {
1393                         ret = -EIO;
1394                         goto out_put_floppy;
1395                 }
1396
1397                 if (floppy->wp && (filp->f_mode & 2)) {
1398                         ret = -EROFS;
1399                         goto out_put_floppy;
1400                 }
1401                 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED;
1402                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1403                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1404                         idefloppy_create_prevent_cmd(&pc, 1);
1405                         (void) idefloppy_queue_pc_tail(drive, &pc);
1406                 }
1407                 check_disk_change(inode->i_bdev);
1408         } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) {
1409                 ret = -EBUSY;
1410                 goto out_put_floppy;
1411         }
1412         return 0;
1413
1414 out_put_floppy:
1415         floppy->openers--;
1416         ide_floppy_put(floppy);
1417         return ret;
1418 }
1419
1420 static int idefloppy_release(struct inode *inode, struct file *filp)
1421 {
1422         struct gendisk *disk = inode->i_bdev->bd_disk;
1423         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1424         ide_drive_t *drive = floppy->drive;
1425         struct ide_atapi_pc pc;
1426
1427         debug_log("Reached %s\n", __func__);
1428
1429         if (floppy->openers == 1) {
1430                 /* IOMEGA Clik! drives do not support lock/unlock commands */
1431                 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1432                         idefloppy_create_prevent_cmd(&pc, 0);
1433                         (void) idefloppy_queue_pc_tail(drive, &pc);
1434                 }
1435
1436                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1437         }
1438
1439         floppy->openers--;
1440
1441         ide_floppy_put(floppy);
1442
1443         return 0;
1444 }
1445
1446 static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1447 {
1448         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1449         ide_drive_t *drive = floppy->drive;
1450
1451         geo->heads = drive->bios_head;
1452         geo->sectors = drive->bios_sect;
1453         geo->cylinders = (u16)drive->bios_cyl; /* truncate */
1454         return 0;
1455 }
1456
1457 static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy,
1458                 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd)
1459 {
1460         if (floppy->openers > 1)
1461                 return -EBUSY;
1462
1463         /* The IOMEGA Clik! Drive doesn't support this command -
1464          * no room for an eject mechanism */
1465         if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) {
1466                 int prevent = arg ? 1 : 0;
1467
1468                 if (cmd == CDROMEJECT)
1469                         prevent = 0;
1470
1471                 idefloppy_create_prevent_cmd(pc, prevent);
1472                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1473         }
1474
1475         if (cmd == CDROMEJECT) {
1476                 idefloppy_create_start_stop_cmd(pc, 2);
1477                 (void) idefloppy_queue_pc_tail(floppy->drive, pc);
1478         }
1479
1480         return 0;
1481 }
1482
1483 static int ide_floppy_format_unit(idefloppy_floppy_t *floppy,
1484                                   int __user *arg)
1485 {
1486         int blocks, length, flags, err = 0;
1487         struct ide_atapi_pc pc;
1488
1489         if (floppy->openers > 1) {
1490                 /* Don't format if someone is using the disk */
1491                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1492                 return -EBUSY;
1493         }
1494
1495         floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1496
1497         /*
1498          * Send ATAPI_FORMAT_UNIT to the drive.
1499          *
1500          * Userland gives us the following structure:
1501          *
1502          * struct idefloppy_format_command {
1503          *        int nblocks;
1504          *        int blocksize;
1505          *        int flags;
1506          *        } ;
1507          *
1508          * flags is a bitmask, currently, the only defined flag is:
1509          *
1510          *        0x01 - verify media after format.
1511          */
1512         if (get_user(blocks, arg) ||
1513                         get_user(length, arg+1) ||
1514                         get_user(flags, arg+2)) {
1515                 err = -EFAULT;
1516                 goto out;
1517         }
1518
1519         (void) idefloppy_get_sfrp_bit(floppy->drive);
1520         idefloppy_create_format_unit_cmd(&pc, blocks, length, flags);
1521
1522         if (idefloppy_queue_pc_tail(floppy->drive, &pc))
1523                 err = -EIO;
1524
1525 out:
1526         if (err)
1527                 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS;
1528         return err;
1529 }
1530
1531
1532 static int idefloppy_ioctl(struct inode *inode, struct file *file,
1533                         unsigned int cmd, unsigned long arg)
1534 {
1535         struct block_device *bdev = inode->i_bdev;
1536         struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk);
1537         ide_drive_t *drive = floppy->drive;
1538         struct ide_atapi_pc pc;
1539         void __user *argp = (void __user *)arg;
1540         int err;
1541
1542         switch (cmd) {
1543         case CDROMEJECT:
1544                 /* fall through */
1545         case CDROM_LOCKDOOR:
1546                 return ide_floppy_lockdoor(floppy, &pc, arg, cmd);
1547         case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED:
1548                 return 0;
1549         case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY:
1550                 return ide_floppy_get_format_capacities(drive, argp);
1551         case IDEFLOPPY_IOCTL_FORMAT_START:
1552                 if (!(file->f_mode & 2))
1553                         return -EPERM;
1554
1555                 return ide_floppy_format_unit(floppy, (int __user *)arg);
1556         case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS:
1557                 return idefloppy_get_format_progress(drive, argp);
1558         }
1559
1560         /*
1561          * skip SCSI_IOCTL_SEND_COMMAND (deprecated)
1562          * and CDROM_SEND_PACKET (legacy) ioctls
1563          */
1564         if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND)
1565                 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue,
1566                                         bdev->bd_disk, cmd, argp);
1567         else
1568                 err = -ENOTTY;
1569
1570         if (err == -ENOTTY)
1571                 err = generic_ide_ioctl(drive, file, bdev, cmd, arg);
1572
1573         return err;
1574 }
1575
1576 static int idefloppy_media_changed(struct gendisk *disk)
1577 {
1578         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1579         ide_drive_t *drive = floppy->drive;
1580         int ret;
1581
1582         /* do not scan partitions twice if this is a removable device */
1583         if (drive->attach) {
1584                 drive->attach = 0;
1585                 return 0;
1586         }
1587         ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED);
1588         floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED;
1589         return ret;
1590 }
1591
1592 static int idefloppy_revalidate_disk(struct gendisk *disk)
1593 {
1594         struct ide_floppy_obj *floppy = ide_floppy_g(disk);
1595         set_capacity(disk, idefloppy_capacity(floppy->drive));
1596         return 0;
1597 }
1598
1599 static struct block_device_operations idefloppy_ops = {
1600         .owner                  = THIS_MODULE,
1601         .open                   = idefloppy_open,
1602         .release                = idefloppy_release,
1603         .ioctl                  = idefloppy_ioctl,
1604         .getgeo                 = idefloppy_getgeo,
1605         .media_changed          = idefloppy_media_changed,
1606         .revalidate_disk        = idefloppy_revalidate_disk
1607 };
1608
1609 static int ide_floppy_probe(ide_drive_t *drive)
1610 {
1611         idefloppy_floppy_t *floppy;
1612         struct gendisk *g;
1613
1614         if (!strstr("ide-floppy", drive->driver_req))
1615                 goto failed;
1616         if (!drive->present)
1617                 goto failed;
1618         if (drive->media != ide_floppy)
1619                 goto failed;
1620         if (!idefloppy_identify_device(drive, drive->id)) {
1621                 printk(KERN_ERR "ide-floppy: %s: not supported by this version"
1622                                 " of ide-floppy\n", drive->name);
1623                 goto failed;
1624         }
1625         if (drive->scsi) {
1626                 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi"
1627                                 " emulation.\n", drive->name);
1628                 goto failed;
1629         }
1630         floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
1631         if (!floppy) {
1632                 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy"
1633                                 " structure\n", drive->name);
1634                 goto failed;
1635         }
1636
1637         g = alloc_disk(1 << PARTN_BITS);
1638         if (!g)
1639                 goto out_free_floppy;
1640
1641         ide_init_disk(g, drive);
1642
1643         ide_proc_register_driver(drive, &idefloppy_driver);
1644
1645         kref_init(&floppy->kref);
1646
1647         floppy->drive = drive;
1648         floppy->driver = &idefloppy_driver;
1649         floppy->disk = g;
1650
1651         g->private_data = &floppy->driver;
1652
1653         drive->driver_data = floppy;
1654
1655         idefloppy_setup(drive, floppy);
1656
1657         g->minors = 1 << PARTN_BITS;
1658         g->driverfs_dev = &drive->gendev;
1659         g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
1660         g->fops = &idefloppy_ops;
1661         drive->attach = 1;
1662         add_disk(g);
1663         return 0;
1664
1665 out_free_floppy:
1666         kfree(floppy);
1667 failed:
1668         return -ENODEV;
1669 }
1670
1671 static void __exit idefloppy_exit(void)
1672 {
1673         driver_unregister(&idefloppy_driver.gen_driver);
1674 }
1675
1676 static int __init idefloppy_init(void)
1677 {
1678         printk("ide-floppy driver " IDEFLOPPY_VERSION "\n");
1679         return driver_register(&idefloppy_driver.gen_driver);
1680 }
1681
1682 MODULE_ALIAS("ide:*m-floppy*");
1683 module_init(idefloppy_init);
1684 module_exit(idefloppy_exit);
1685 MODULE_LICENSE("GPL");
1686 MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
1687