bf9f61a5c2f8651769c500c89212d0c7ff9d8a2c
[linux-2.6.git] / drivers / ide / ide-cd.c
1 /*
2  * ATAPI CD-ROM driver.
3  *
4  * Copyright (C) 1994-1996   Scott Snyder <snyder@fnald0.fnal.gov>
5  * Copyright (C) 1996-1998   Erik Andersen <andersee@debian.org>
6  * Copyright (C) 1998-2000   Jens Axboe <axboe@suse.de>
7  * Copyright (C) 2005, 2007-2009  Bartlomiej Zolnierkiewicz
8  *
9  * May be copied or modified under the terms of the GNU General Public
10  * License.  See linux/COPYING for more information.
11  *
12  * See Documentation/cdrom/ide-cd for usage information.
13  *
14  * Suggestions are welcome. Patches that work are more welcome though. ;-)
15  *
16  * Documentation:
17  *      Mt. Fuji (SFF8090 version 4) and ATAPI (SFF-8020i rev 2.6) standards.
18  *
19  * For historical changelog please see:
20  *      Documentation/ide/ChangeLog.ide-cd.1994-2004
21  */
22
23 #define DRV_NAME "ide-cd"
24 #define PFX DRV_NAME ": "
25
26 #define IDECD_VERSION "5.00"
27
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/kernel.h>
31 #include <linux/delay.h>
32 #include <linux/timer.h>
33 #include <linux/seq_file.h>
34 #include <linux/smp_lock.h>
35 #include <linux/slab.h>
36 #include <linux/interrupt.h>
37 #include <linux/errno.h>
38 #include <linux/cdrom.h>
39 #include <linux/ide.h>
40 #include <linux/completion.h>
41 #include <linux/mutex.h>
42 #include <linux/bcd.h>
43
44 /* For SCSI -> ATAPI command conversion */
45 #include <scsi/scsi.h>
46
47 #include <linux/irq.h>
48 #include <linux/io.h>
49 #include <asm/byteorder.h>
50 #include <linux/uaccess.h>
51 #include <asm/unaligned.h>
52
53 #include "ide-cd.h"
54
55 static DEFINE_MUTEX(idecd_ref_mutex);
56
57 static void ide_cd_release(struct device *);
58
59 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
60 {
61         struct cdrom_info *cd = NULL;
62
63         mutex_lock(&idecd_ref_mutex);
64         cd = ide_drv_g(disk, cdrom_info);
65         if (cd) {
66                 if (ide_device_get(cd->drive))
67                         cd = NULL;
68                 else
69                         get_device(&cd->dev);
70
71         }
72         mutex_unlock(&idecd_ref_mutex);
73         return cd;
74 }
75
76 static void ide_cd_put(struct cdrom_info *cd)
77 {
78         ide_drive_t *drive = cd->drive;
79
80         mutex_lock(&idecd_ref_mutex);
81         put_device(&cd->dev);
82         ide_device_put(drive);
83         mutex_unlock(&idecd_ref_mutex);
84 }
85
86 /*
87  * Generic packet command support and error handling routines.
88  */
89
90 /* Mark that we've seen a media change and invalidate our internal buffers. */
91 static void cdrom_saw_media_change(ide_drive_t *drive)
92 {
93         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
94         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
95 }
96
97 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
98 {
99         struct request_sense *sense = &drive->sense_data;
100         int log = 0;
101
102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103                 return 0;
104
105         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
106
107         switch (sense->sense_key) {
108         case NO_SENSE:
109         case RECOVERED_ERROR:
110                 break;
111         case NOT_READY:
112                 /*
113                  * don't care about tray state messages for e.g. capacity
114                  * commands or in-progress or becoming ready
115                  */
116                 if (sense->asc == 0x3a || sense->asc == 0x04)
117                         break;
118                 log = 1;
119                 break;
120         case ILLEGAL_REQUEST:
121                 /*
122                  * don't log START_STOP unit with LoEj set, since we cannot
123                  * reliably check if drive can auto-close
124                  */
125                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
126                         break;
127                 log = 1;
128                 break;
129         case UNIT_ATTENTION:
130                 /*
131                  * Make good and sure we've seen this potential media change.
132                  * Some drives (i.e. Creative) fail to present the correct sense
133                  * key in the error register.
134                  */
135                 cdrom_saw_media_change(drive);
136                 break;
137         default:
138                 log = 1;
139                 break;
140         }
141         return log;
142 }
143
144 static void cdrom_analyze_sense_data(ide_drive_t *drive,
145                                      struct request *failed_command)
146 {
147         struct request_sense *sense = &drive->sense_data;
148         struct cdrom_info *info = drive->driver_data;
149         unsigned long sector;
150         unsigned long bio_sectors;
151
152         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
153                                      sense->error_code, sense->sense_key);
154
155         if (failed_command)
156                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
157                                              failed_command->cmd[0]);
158
159         if (!cdrom_log_sense(drive, failed_command))
160                 return;
161
162         /*
163          * If a read toc is executed for a CD-R or CD-RW medium where the first
164          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
165          * confusing error)
166          */
167         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
168                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
169                         return;
170
171         /* current error */
172         if (sense->error_code == 0x70) {
173                 switch (sense->sense_key) {
174                 case MEDIUM_ERROR:
175                 case VOLUME_OVERFLOW:
176                 case ILLEGAL_REQUEST:
177                         if (!sense->valid)
178                                 break;
179                         if (failed_command == NULL ||
180                             failed_command->cmd_type != REQ_TYPE_FS)
181                                 break;
182                         sector = (sense->information[0] << 24) |
183                                  (sense->information[1] << 16) |
184                                  (sense->information[2] <<  8) |
185                                  (sense->information[3]);
186
187                         if (queue_logical_block_size(drive->queue) == 2048)
188                                 /* device sector size is 2K */
189                                 sector <<= 2;
190
191                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
192                         sector &= ~(bio_sectors - 1);
193
194                         /*
195                          * The SCSI specification allows for the value
196                          * returned by READ CAPACITY to be up to 75 2K
197                          * sectors past the last readable block.
198                          * Therefore, if we hit a medium error within the
199                          * last 75 2K sectors, we decrease the saved size
200                          * value.
201                          */
202                         if (sector < get_capacity(info->disk) &&
203                             drive->probed_capacity - sector < 4 * 75)
204                                 set_capacity(info->disk, sector);
205                 }
206         }
207
208         ide_cd_log_error(drive->name, failed_command, sense);
209 }
210
211 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
212 {
213         /*
214          * For REQ_TYPE_SENSE, "rq->special" points to the original
215          * failed request.  Also, the sense data should be read
216          * directly from rq which might be different from the original
217          * sense buffer if it got copied during mapping.
218          */
219         struct request *failed = (struct request *)rq->special;
220         void *sense = bio_data(rq->bio);
221
222         if (failed) {
223                 if (failed->sense) {
224                         /*
225                          * Sense is always read into drive->sense_data.
226                          * Copy back if the failed request has its
227                          * sense pointer set.
228                          */
229                         memcpy(failed->sense, sense, 18);
230                         failed->sense_len = rq->sense_len;
231                 }
232                 cdrom_analyze_sense_data(drive, failed);
233
234                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
235                         BUG();
236         } else
237                 cdrom_analyze_sense_data(drive, NULL);
238 }
239
240
241 /*
242  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
243  * while flushing data from cache.
244  *
245  * returns: 0 failed (write timeout expired)
246  *          1 success
247  */
248 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
249 {
250
251         struct cdrom_info *info = drive->driver_data;
252
253         if (!rq->errors)
254                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
255
256         rq->errors = 1;
257
258         if (time_after(jiffies, info->write_timeout))
259                 return 0;
260         else {
261                 struct request_queue *q = drive->queue;
262                 unsigned long flags;
263
264                 /*
265                  * take a breather relying on the unplug timer to kick us again
266                  */
267
268                 spin_lock_irqsave(q->queue_lock, flags);
269                 blk_plug_device(q);
270                 spin_unlock_irqrestore(q->queue_lock, flags);
271
272                 return 1;
273         }
274 }
275
276 /**
277  * Returns:
278  * 0: if the request should be continued.
279  * 1: if the request will be going through error recovery.
280  * 2: if the request should be ended.
281  */
282 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
283 {
284         ide_hwif_t *hwif = drive->hwif;
285         struct request *rq = hwif->rq;
286         int err, sense_key, do_end_request = 0;
287
288         /* get the IDE error register */
289         err = ide_read_error(drive);
290         sense_key = err >> 4;
291
292         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
293                                   "stat 0x%x",
294                                   rq->cmd[0], rq->cmd_type, err, stat);
295
296         if (rq->cmd_type == REQ_TYPE_SENSE) {
297                 /*
298                  * We got an error trying to get sense info from the drive
299                  * (probably while trying to recover from a former error).
300                  * Just give up.
301                  */
302                 rq->cmd_flags |= REQ_FAILED;
303                 return 2;
304         }
305
306         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
307         if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
308                 rq->errors = SAM_STAT_CHECK_CONDITION;
309
310         if (blk_noretry_request(rq))
311                 do_end_request = 1;
312
313         switch (sense_key) {
314         case NOT_READY:
315                 if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
316                         if (ide_cd_breathe(drive, rq))
317                                 return 1;
318                 } else {
319                         cdrom_saw_media_change(drive);
320
321                         if (rq->cmd_type == REQ_TYPE_FS &&
322                             !(rq->cmd_flags & REQ_QUIET))
323                                 printk(KERN_ERR PFX "%s: tray open\n",
324                                         drive->name);
325                 }
326                 do_end_request = 1;
327                 break;
328         case UNIT_ATTENTION:
329                 cdrom_saw_media_change(drive);
330
331                 if (rq->cmd_type != REQ_TYPE_FS)
332                         return 0;
333
334                 /*
335                  * Arrange to retry the request but be sure to give up if we've
336                  * retried too many times.
337                  */
338                 if (++rq->errors > ERROR_MAX)
339                         do_end_request = 1;
340                 break;
341         case ILLEGAL_REQUEST:
342                 /*
343                  * Don't print error message for this condition -- SFF8090i
344                  * indicates that 5/24/00 is the correct response to a request
345                  * to close the tray if the drive doesn't have that capability.
346                  *
347                  * cdrom_log_sense() knows this!
348                  */
349                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
350                         break;
351                 /* fall-through */
352         case DATA_PROTECT:
353                 /*
354                  * No point in retrying after an illegal request or data
355                  * protect error.
356                  */
357                 if (!(rq->cmd_flags & REQ_QUIET))
358                         ide_dump_status(drive, "command error", stat);
359                 do_end_request = 1;
360                 break;
361         case MEDIUM_ERROR:
362                 /*
363                  * No point in re-trying a zillion times on a bad sector.
364                  * If we got here the error is not correctable.
365                  */
366                 if (!(rq->cmd_flags & REQ_QUIET))
367                         ide_dump_status(drive, "media error "
368                                         "(bad sector)", stat);
369                 do_end_request = 1;
370                 break;
371         case BLANK_CHECK:
372                 /* disk appears blank? */
373                 if (!(rq->cmd_flags & REQ_QUIET))
374                         ide_dump_status(drive, "media error (blank)",
375                                         stat);
376                 do_end_request = 1;
377                 break;
378         default:
379                 if (rq->cmd_type != REQ_TYPE_FS)
380                         break;
381                 if (err & ~ATA_ABORTED) {
382                         /* go to the default handler for other errors */
383                         ide_error(drive, "cdrom_decode_status", stat);
384                         return 1;
385                 } else if (++rq->errors > ERROR_MAX)
386                         /* we've racked up too many retries, abort */
387                         do_end_request = 1;
388         }
389
390         if (rq->cmd_type != REQ_TYPE_FS) {
391                 rq->cmd_flags |= REQ_FAILED;
392                 do_end_request = 1;
393         }
394
395         /*
396          * End a request through request sense analysis when we have sense data.
397          * We need this in order to perform end of media processing.
398          */
399         if (do_end_request)
400                 goto end_request;
401
402         /* if we got a CHECK_CONDITION status, queue a request sense command */
403         if (stat & ATA_ERR)
404                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
405         return 1;
406
407 end_request:
408         if (stat & ATA_ERR) {
409                 hwif->rq = NULL;
410                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
411         } else
412                 return 2;
413 }
414
415 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
416 {
417         struct request *rq = cmd->rq;
418
419         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
420
421         /*
422          * Some of the trailing request sense fields are optional,
423          * and some drives don't send them.  Sigh.
424          */
425         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
426             cmd->nleft > 0 && cmd->nleft <= 5)
427                 cmd->nleft = 0;
428 }
429
430 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
431                     int write, void *buffer, unsigned *bufflen,
432                     struct request_sense *sense, int timeout,
433                     unsigned int cmd_flags)
434 {
435         struct cdrom_info *info = drive->driver_data;
436         struct request_sense local_sense;
437         int retries = 10;
438         unsigned int flags = 0;
439
440         if (!sense)
441                 sense = &local_sense;
442
443         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
444                                   "cmd_flags: 0x%x",
445                                   cmd[0], write, timeout, cmd_flags);
446
447         /* start of retry loop */
448         do {
449                 struct request *rq;
450                 int error;
451
452                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
453
454                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
455                 rq->cmd_type = REQ_TYPE_ATA_PC;
456                 rq->sense = sense;
457                 rq->cmd_flags |= cmd_flags;
458                 rq->timeout = timeout;
459                 if (buffer) {
460                         error = blk_rq_map_kern(drive->queue, rq, buffer,
461                                                 *bufflen, GFP_NOIO);
462                         if (error) {
463                                 blk_put_request(rq);
464                                 return error;
465                         }
466                 }
467
468                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
469
470                 if (buffer)
471                         *bufflen = rq->resid_len;
472
473                 flags = rq->cmd_flags;
474                 blk_put_request(rq);
475
476                 /*
477                  * FIXME: we should probably abort/retry or something in case of
478                  * failure.
479                  */
480                 if (flags & REQ_FAILED) {
481                         /*
482                          * The request failed.  Retry if it was due to a unit
483                          * attention status (usually means media was changed).
484                          */
485                         struct request_sense *reqbuf = sense;
486
487                         if (reqbuf->sense_key == UNIT_ATTENTION)
488                                 cdrom_saw_media_change(drive);
489                         else if (reqbuf->sense_key == NOT_READY &&
490                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
491                                 /*
492                                  * The drive is in the process of loading
493                                  * a disk.  Retry, but wait a little to give
494                                  * the drive time to complete the load.
495                                  */
496                                 ssleep(2);
497                         } else {
498                                 /* otherwise, don't retry */
499                                 retries = 0;
500                         }
501                         --retries;
502                 }
503
504                 /* end of retry loop */
505         } while ((flags & REQ_FAILED) && retries >= 0);
506
507         /* return an error if the command failed */
508         return (flags & REQ_FAILED) ? -EIO : 0;
509 }
510
511 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
512 {
513         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
514
515         if (cmd->tf_flags & IDE_TFLAG_WRITE)
516                 nr_bytes -= cmd->last_xfer_len;
517
518         if (nr_bytes > 0)
519                 ide_complete_rq(drive, 0, nr_bytes);
520 }
521
522 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
523 {
524         ide_hwif_t *hwif = drive->hwif;
525         struct ide_cmd *cmd = &hwif->cmd;
526         struct request *rq = hwif->rq;
527         ide_expiry_t *expiry = NULL;
528         int dma_error = 0, dma, thislen, uptodate = 0;
529         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
530         int sense = (rq->cmd_type == REQ_TYPE_SENSE);
531         unsigned int timeout;
532         u16 len;
533         u8 ireason, stat;
534
535         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
536
537         /* check for errors */
538         dma = drive->dma;
539         if (dma) {
540                 drive->dma = 0;
541                 drive->waiting_for_dma = 0;
542                 dma_error = hwif->dma_ops->dma_end(drive);
543                 ide_dma_unmap_sg(drive, cmd);
544                 if (dma_error) {
545                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
546                                         write ? "write" : "read");
547                         ide_dma_off(drive);
548                 }
549         }
550
551         /* check status */
552         stat = hwif->tp_ops->read_status(hwif);
553
554         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
555                 rc = cdrom_decode_status(drive, stat);
556                 if (rc) {
557                         if (rc == 2)
558                                 goto out_end;
559                         return ide_stopped;
560                 }
561         }
562
563         /* using dma, transfer is complete now */
564         if (dma) {
565                 if (dma_error)
566                         return ide_error(drive, "dma error", stat);
567                 uptodate = 1;
568                 goto out_end;
569         }
570
571         ide_read_bcount_and_ireason(drive, &len, &ireason);
572
573         thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
574         if (thislen > len)
575                 thislen = len;
576
577         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
578                                   stat, thislen);
579
580         /* If DRQ is clear, the command has completed. */
581         if ((stat & ATA_DRQ) == 0) {
582                 if (rq->cmd_type == REQ_TYPE_FS) {
583                         /*
584                          * If we're not done reading/writing, complain.
585                          * Otherwise, complete the command normally.
586                          */
587                         uptodate = 1;
588                         if (cmd->nleft > 0) {
589                                 printk(KERN_ERR PFX "%s: %s: data underrun "
590                                         "(%u bytes)\n", drive->name, __func__,
591                                         cmd->nleft);
592                                 if (!write)
593                                         rq->cmd_flags |= REQ_FAILED;
594                                 uptodate = 0;
595                         }
596                 } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
597                         ide_cd_request_sense_fixup(drive, cmd);
598
599                         uptodate = cmd->nleft ? 0 : 1;
600
601                         /*
602                          * suck out the remaining bytes from the drive in an
603                          * attempt to complete the data xfer. (see BZ#13399)
604                          */
605                         if (!(stat & ATA_ERR) && !uptodate && thislen) {
606                                 ide_pio_bytes(drive, cmd, write, thislen);
607                                 uptodate = cmd->nleft ? 0 : 1;
608                         }
609
610                         if (!uptodate)
611                                 rq->cmd_flags |= REQ_FAILED;
612                 }
613                 goto out_end;
614         }
615
616         rc = ide_check_ireason(drive, rq, len, ireason, write);
617         if (rc)
618                 goto out_end;
619
620         cmd->last_xfer_len = 0;
621
622         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
623                                   "ireason: 0x%x",
624                                   rq->cmd_type, ireason);
625
626         /* transfer data */
627         while (thislen > 0) {
628                 int blen = min_t(int, thislen, cmd->nleft);
629
630                 if (cmd->nleft == 0)
631                         break;
632
633                 ide_pio_bytes(drive, cmd, write, blen);
634                 cmd->last_xfer_len += blen;
635
636                 thislen -= blen;
637                 len -= blen;
638
639                 if (sense && write == 0)
640                         rq->sense_len += blen;
641         }
642
643         /* pad, if necessary */
644         if (len > 0) {
645                 if (rq->cmd_type != REQ_TYPE_FS || write == 0)
646                         ide_pad_transfer(drive, write, len);
647                 else {
648                         printk(KERN_ERR PFX "%s: confused, missing data\n",
649                                 drive->name);
650                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
651                 }
652         }
653
654         if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
655                 timeout = rq->timeout;
656         } else {
657                 timeout = ATAPI_WAIT_PC;
658                 if (rq->cmd_type != REQ_TYPE_FS)
659                         expiry = ide_cd_expiry;
660         }
661
662         hwif->expiry = expiry;
663         ide_set_handler(drive, cdrom_newpc_intr, timeout);
664         return ide_started;
665
666 out_end:
667         if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
668                 rq->resid_len = 0;
669                 blk_end_request_all(rq, 0);
670                 hwif->rq = NULL;
671         } else {
672                 if (sense && uptodate)
673                         ide_cd_complete_failed_rq(drive, rq);
674
675                 if (rq->cmd_type == REQ_TYPE_FS) {
676                         if (cmd->nleft == 0)
677                                 uptodate = 1;
678                 } else {
679                         if (uptodate <= 0 && rq->errors == 0)
680                                 rq->errors = -EIO;
681                 }
682
683                 if (uptodate == 0 && rq->bio)
684                         ide_cd_error_cmd(drive, cmd);
685
686                 /* make sure it's fully ended */
687                 if (rq->cmd_type != REQ_TYPE_FS) {
688                         rq->resid_len -= cmd->nbytes - cmd->nleft;
689                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
690                                 rq->resid_len += cmd->last_xfer_len;
691                 }
692
693                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
694
695                 if (sense && rc == 2)
696                         ide_error(drive, "request sense failure", stat);
697         }
698         return ide_stopped;
699 }
700
701 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
702 {
703         struct cdrom_info *cd = drive->driver_data;
704         struct request_queue *q = drive->queue;
705         int write = rq_data_dir(rq) == WRITE;
706         unsigned short sectors_per_frame =
707                 queue_logical_block_size(q) >> SECTOR_BITS;
708
709         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
710                                   "secs_per_frame: %u",
711                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
712
713         if (write) {
714                 /* disk has become write protected */
715                 if (get_disk_ro(cd->disk))
716                         return ide_stopped;
717         } else {
718                 /*
719                  * We may be retrying this request after an error.  Fix up any
720                  * weirdness which might be present in the request packet.
721                  */
722                 q->prep_rq_fn(q, rq);
723         }
724
725         /* fs requests *must* be hardware frame aligned */
726         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
727             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
728                 return ide_stopped;
729
730         /* use DMA, if possible */
731         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
732
733         if (write)
734                 cd->devinfo.media_written = 1;
735
736         rq->timeout = ATAPI_WAIT_PC;
737
738         return ide_started;
739 }
740
741 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
742 {
743
744         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
745                                   rq->cmd[0], rq->cmd_type);
746
747         if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
748                 rq->cmd_flags |= REQ_QUIET;
749         else
750                 rq->cmd_flags &= ~REQ_FAILED;
751
752         drive->dma = 0;
753
754         /* sg request */
755         if (rq->bio) {
756                 struct request_queue *q = drive->queue;
757                 char *buf = bio_data(rq->bio);
758                 unsigned int alignment;
759
760                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
761
762                 /*
763                  * check if dma is safe
764                  *
765                  * NOTE! The "len" and "addr" checks should possibly have
766                  * separate masks.
767                  */
768                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
769                 if ((unsigned long)buf & alignment
770                     || blk_rq_bytes(rq) & q->dma_pad_mask
771                     || object_is_on_stack(buf))
772                         drive->dma = 0;
773         }
774 }
775
776 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
777                                         sector_t block)
778 {
779         struct ide_cmd cmd;
780         int uptodate = 0, nsectors;
781
782         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
783                                   rq->cmd[0], (unsigned long long)block);
784
785         if (drive->debug_mask & IDE_DBG_RQ)
786                 blk_dump_rq_flags(rq, "ide_cd_do_request");
787
788         switch (rq->cmd_type) {
789         case REQ_TYPE_FS:
790                 if (cdrom_start_rw(drive, rq) == ide_stopped)
791                         goto out_end;
792                 break;
793         case REQ_TYPE_SENSE:
794         case REQ_TYPE_BLOCK_PC:
795         case REQ_TYPE_ATA_PC:
796                 if (!rq->timeout)
797                         rq->timeout = ATAPI_WAIT_PC;
798
799                 cdrom_do_block_pc(drive, rq);
800                 break;
801         case REQ_TYPE_SPECIAL:
802                 /* right now this can only be a reset... */
803                 uptodate = 1;
804                 goto out_end;
805         default:
806                 BUG();
807         }
808
809         /* prepare sense request for this command */
810         ide_prep_sense(drive, rq);
811
812         memset(&cmd, 0, sizeof(cmd));
813
814         if (rq_data_dir(rq))
815                 cmd.tf_flags |= IDE_TFLAG_WRITE;
816
817         cmd.rq = rq;
818
819         if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
820                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
821                 ide_map_sg(drive, &cmd);
822         }
823
824         return ide_issue_pc(drive, &cmd);
825 out_end:
826         nsectors = blk_rq_sectors(rq);
827
828         if (nsectors == 0)
829                 nsectors = 1;
830
831         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
832
833         return ide_stopped;
834 }
835
836 /*
837  * Ioctl handling.
838  *
839  * Routines which queue packet commands take as a final argument a pointer to a
840  * request_sense struct. If execution of the command results in an error with a
841  * CHECK CONDITION status, this structure will be filled with the results of the
842  * subsequent request sense command. The pointer can also be NULL, in which case
843  * no sense information is returned.
844  */
845 static void msf_from_bcd(struct atapi_msf *msf)
846 {
847         msf->minute = bcd2bin(msf->minute);
848         msf->second = bcd2bin(msf->second);
849         msf->frame  = bcd2bin(msf->frame);
850 }
851
852 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
853 {
854         struct cdrom_info *info = drive->driver_data;
855         struct cdrom_device_info *cdi = &info->devinfo;
856         unsigned char cmd[BLK_MAX_CDB];
857
858         ide_debug_log(IDE_DBG_FUNC, "enter");
859
860         memset(cmd, 0, BLK_MAX_CDB);
861         cmd[0] = GPCMD_TEST_UNIT_READY;
862
863         /*
864          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
865          * instead of supporting the LOAD_UNLOAD opcode.
866          */
867         cmd[7] = cdi->sanyo_slot % 3;
868
869         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
870 }
871
872 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
873                                unsigned long *sectors_per_frame,
874                                struct request_sense *sense)
875 {
876         struct {
877                 __be32 lba;
878                 __be32 blocklen;
879         } capbuf;
880
881         int stat;
882         unsigned char cmd[BLK_MAX_CDB];
883         unsigned len = sizeof(capbuf);
884         u32 blocklen;
885
886         ide_debug_log(IDE_DBG_FUNC, "enter");
887
888         memset(cmd, 0, BLK_MAX_CDB);
889         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
890
891         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
892                                REQ_QUIET);
893         if (stat)
894                 return stat;
895
896         /*
897          * Sanity check the given block size, in so far as making
898          * sure the sectors_per_frame we give to the caller won't
899          * end up being bogus.
900          */
901         blocklen = be32_to_cpu(capbuf.blocklen);
902         blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
903         switch (blocklen) {
904         case 512:
905         case 1024:
906         case 2048:
907         case 4096:
908                 break;
909         default:
910                 printk_once(KERN_ERR PFX "%s: weird block size %u; "
911                                 "setting default block size to 2048\n",
912                                 drive->name, blocklen);
913                 blocklen = 2048;
914                 break;
915         }
916
917         *capacity = 1 + be32_to_cpu(capbuf.lba);
918         *sectors_per_frame = blocklen >> SECTOR_BITS;
919
920         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
921                                      *capacity, *sectors_per_frame);
922
923         return 0;
924 }
925
926 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
927                                 int format, char *buf, int buflen,
928                                 struct request_sense *sense)
929 {
930         unsigned char cmd[BLK_MAX_CDB];
931
932         ide_debug_log(IDE_DBG_FUNC, "enter");
933
934         memset(cmd, 0, BLK_MAX_CDB);
935
936         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
937         cmd[6] = trackno;
938         cmd[7] = (buflen >> 8);
939         cmd[8] = (buflen & 0xff);
940         cmd[9] = (format << 6);
941
942         if (msf_flag)
943                 cmd[1] = 2;
944
945         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
946 }
947
948 /* Try to read the entire TOC for the disk into our internal buffer. */
949 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
950 {
951         int stat, ntracks, i;
952         struct cdrom_info *info = drive->driver_data;
953         struct cdrom_device_info *cdi = &info->devinfo;
954         struct atapi_toc *toc = info->toc;
955         struct {
956                 struct atapi_toc_header hdr;
957                 struct atapi_toc_entry  ent;
958         } ms_tmp;
959         long last_written;
960         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
961
962         ide_debug_log(IDE_DBG_FUNC, "enter");
963
964         if (toc == NULL) {
965                 /* try to allocate space */
966                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
967                 if (toc == NULL) {
968                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
969                                         drive->name);
970                         return -ENOMEM;
971                 }
972                 info->toc = toc;
973         }
974
975         /*
976          * Check to see if the existing data is still valid. If it is,
977          * just return.
978          */
979         (void) cdrom_check_status(drive, sense);
980
981         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
982                 return 0;
983
984         /* try to get the total cdrom capacity and sector size */
985         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
986                                    sense);
987         if (stat)
988                 toc->capacity = 0x1fffff;
989
990         set_capacity(info->disk, toc->capacity * sectors_per_frame);
991         /* save a private copy of the TOC capacity for error handling */
992         drive->probed_capacity = toc->capacity * sectors_per_frame;
993
994         blk_queue_logical_block_size(drive->queue,
995                                      sectors_per_frame << SECTOR_BITS);
996
997         /* first read just the header, so we know how long the TOC is */
998         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
999                                     sizeof(struct atapi_toc_header), sense);
1000         if (stat)
1001                 return stat;
1002
1003         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1004                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1005                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1006         }
1007
1008         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1009         if (ntracks <= 0)
1010                 return -EIO;
1011         if (ntracks > MAX_TRACKS)
1012                 ntracks = MAX_TRACKS;
1013
1014         /* now read the whole schmeer */
1015         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1016                                   (char *)&toc->hdr,
1017                                    sizeof(struct atapi_toc_header) +
1018                                    (ntracks + 1) *
1019                                    sizeof(struct atapi_toc_entry), sense);
1020
1021         if (stat && toc->hdr.first_track > 1) {
1022                 /*
1023                  * Cds with CDI tracks only don't have any TOC entries, despite
1024                  * of this the returned values are
1025                  * first_track == last_track = number of CDI tracks + 1,
1026                  * so that this case is indistinguishable from the same layout
1027                  * plus an additional audio track. If we get an error for the
1028                  * regular case, we assume a CDI without additional audio
1029                  * tracks. In this case the readable TOC is empty (CDI tracks
1030                  * are not included) and only holds the Leadout entry.
1031                  *
1032                  * Heiko EiƟfeldt.
1033                  */
1034                 ntracks = 0;
1035                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1036                                            (char *)&toc->hdr,
1037                                            sizeof(struct atapi_toc_header) +
1038                                            (ntracks + 1) *
1039                                            sizeof(struct atapi_toc_entry),
1040                                            sense);
1041                 if (stat)
1042                         return stat;
1043
1044                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1045                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1046                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1047                 } else {
1048                         toc->hdr.first_track = CDROM_LEADOUT;
1049                         toc->hdr.last_track = CDROM_LEADOUT;
1050                 }
1051         }
1052
1053         if (stat)
1054                 return stat;
1055
1056         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1057
1058         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1059                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1060                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1061         }
1062
1063         for (i = 0; i <= ntracks; i++) {
1064                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1065                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1066                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1067                         msf_from_bcd(&toc->ent[i].addr.msf);
1068                 }
1069                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1070                                                   toc->ent[i].addr.msf.second,
1071                                                   toc->ent[i].addr.msf.frame);
1072         }
1073
1074         if (toc->hdr.first_track != CDROM_LEADOUT) {
1075                 /* read the multisession information */
1076                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1077                                            sizeof(ms_tmp), sense);
1078                 if (stat)
1079                         return stat;
1080
1081                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1082         } else {
1083                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1084                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1085                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1086         }
1087
1088         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1089                 /* re-read multisession information using MSF format */
1090                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1091                                            sizeof(ms_tmp), sense);
1092                 if (stat)
1093                         return stat;
1094
1095                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1096                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1097                                                    ms_tmp.ent.addr.msf.second,
1098                                                    ms_tmp.ent.addr.msf.frame);
1099         }
1100
1101         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1102
1103         /* now try to get the total cdrom capacity */
1104         stat = cdrom_get_last_written(cdi, &last_written);
1105         if (!stat && (last_written > toc->capacity)) {
1106                 toc->capacity = last_written;
1107                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1108                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1109         }
1110
1111         /* Remember that we've read this stuff. */
1112         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1113
1114         return 0;
1115 }
1116
1117 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1118 {
1119         struct cdrom_info *info = drive->driver_data;
1120         struct cdrom_device_info *cdi = &info->devinfo;
1121         struct packet_command cgc;
1122         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1123
1124         ide_debug_log(IDE_DBG_FUNC, "enter");
1125
1126         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1127                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1128
1129         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1130         do {
1131                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1132                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1133                 if (!stat)
1134                         break;
1135         } while (--attempts);
1136         return stat;
1137 }
1138
1139 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1140 {
1141         struct cdrom_info *cd = drive->driver_data;
1142         u16 curspeed, maxspeed;
1143
1144         ide_debug_log(IDE_DBG_FUNC, "enter");
1145
1146         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1147                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1148                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1149         } else {
1150                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1151                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1152         }
1153
1154         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1155                                      curspeed, maxspeed);
1156
1157         cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1158         cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1159 }
1160
1161 #define IDE_CD_CAPABILITIES \
1162         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1163          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1164          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1165          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1166          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1167
1168 static struct cdrom_device_ops ide_cdrom_dops = {
1169         .open                   = ide_cdrom_open_real,
1170         .release                = ide_cdrom_release_real,
1171         .drive_status           = ide_cdrom_drive_status,
1172         .media_changed          = ide_cdrom_check_media_change_real,
1173         .tray_move              = ide_cdrom_tray_move,
1174         .lock_door              = ide_cdrom_lock_door,
1175         .select_speed           = ide_cdrom_select_speed,
1176         .get_last_session       = ide_cdrom_get_last_session,
1177         .get_mcn                = ide_cdrom_get_mcn,
1178         .reset                  = ide_cdrom_reset,
1179         .audio_ioctl            = ide_cdrom_audio_ioctl,
1180         .capability             = IDE_CD_CAPABILITIES,
1181         .generic_packet         = ide_cdrom_packet,
1182 };
1183
1184 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1185 {
1186         struct cdrom_info *info = drive->driver_data;
1187         struct cdrom_device_info *devinfo = &info->devinfo;
1188
1189         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1190
1191         devinfo->ops = &ide_cdrom_dops;
1192         devinfo->speed = info->current_speed;
1193         devinfo->capacity = nslots;
1194         devinfo->handle = drive;
1195         strcpy(devinfo->name, drive->name);
1196
1197         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1198                 devinfo->mask |= CDC_SELECT_SPEED;
1199
1200         devinfo->disk = info->disk;
1201         return register_cdrom(devinfo);
1202 }
1203
1204 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1205 {
1206         struct cdrom_info *cd = drive->driver_data;
1207         struct cdrom_device_info *cdi = &cd->devinfo;
1208         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1209         mechtype_t mechtype;
1210         int nslots = 1;
1211
1212         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1213                                      drive->media, drive->atapi_flags);
1214
1215         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1216                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1217                      CDC_MO_DRIVE | CDC_RAM);
1218
1219         if (drive->media == ide_optical) {
1220                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1221                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1222                                 drive->name);
1223                 return nslots;
1224         }
1225
1226         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1227                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1228                 cdi->mask &= ~CDC_PLAY_AUDIO;
1229                 return nslots;
1230         }
1231
1232         /*
1233          * We have to cheat a little here. the packet will eventually be queued
1234          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1235          * Since this device hasn't been registered with the Uniform layer yet,
1236          * it can't do this. Same goes for cdi->ops.
1237          */
1238         cdi->handle = drive;
1239         cdi->ops = &ide_cdrom_dops;
1240
1241         if (ide_cdrom_get_capabilities(drive, buf))
1242                 return 0;
1243
1244         if ((buf[8 + 6] & 0x01) == 0)
1245                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1246         if (buf[8 + 6] & 0x08)
1247                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1248         if (buf[8 + 3] & 0x01)
1249                 cdi->mask &= ~CDC_CD_R;
1250         if (buf[8 + 3] & 0x02)
1251                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1252         if (buf[8 + 2] & 0x38)
1253                 cdi->mask &= ~CDC_DVD;
1254         if (buf[8 + 3] & 0x20)
1255                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1256         if (buf[8 + 3] & 0x10)
1257                 cdi->mask &= ~CDC_DVD_R;
1258         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1259                 cdi->mask &= ~CDC_PLAY_AUDIO;
1260
1261         mechtype = buf[8 + 6] >> 5;
1262         if (mechtype == mechtype_caddy ||
1263             mechtype == mechtype_popup ||
1264             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1265                 cdi->mask |= CDC_CLOSE_TRAY;
1266
1267         if (cdi->sanyo_slot > 0) {
1268                 cdi->mask &= ~CDC_SELECT_DISC;
1269                 nslots = 3;
1270         } else if (mechtype == mechtype_individual_changer ||
1271                    mechtype == mechtype_cartridge_changer) {
1272                 nslots = cdrom_number_of_slots(cdi);
1273                 if (nslots > 1)
1274                         cdi->mask &= ~CDC_SELECT_DISC;
1275         }
1276
1277         ide_cdrom_update_speed(drive, buf);
1278
1279         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1280
1281         /* don't print speed if the drive reported 0 */
1282         if (cd->max_speed)
1283                 printk(KERN_CONT " %dX", cd->max_speed);
1284
1285         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1286
1287         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1288                 printk(KERN_CONT " DVD%s%s",
1289                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1290                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1291
1292         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1293                 printk(KERN_CONT " CD%s%s",
1294                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1295                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1296
1297         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1298                 printk(KERN_CONT " changer w/%d slots", nslots);
1299         else
1300                 printk(KERN_CONT " drive");
1301
1302         printk(KERN_CONT ", %dkB Cache\n",
1303                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1304
1305         return nslots;
1306 }
1307
1308 /* standard prep_rq_fn that builds 10 byte cmds */
1309 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1310 {
1311         int hard_sect = queue_logical_block_size(q);
1312         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1313         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1314
1315         memset(rq->cmd, 0, BLK_MAX_CDB);
1316
1317         if (rq_data_dir(rq) == READ)
1318                 rq->cmd[0] = GPCMD_READ_10;
1319         else
1320                 rq->cmd[0] = GPCMD_WRITE_10;
1321
1322         /*
1323          * fill in lba
1324          */
1325         rq->cmd[2] = (block >> 24) & 0xff;
1326         rq->cmd[3] = (block >> 16) & 0xff;
1327         rq->cmd[4] = (block >>  8) & 0xff;
1328         rq->cmd[5] = block & 0xff;
1329
1330         /*
1331          * and transfer length
1332          */
1333         rq->cmd[7] = (blocks >> 8) & 0xff;
1334         rq->cmd[8] = blocks & 0xff;
1335         rq->cmd_len = 10;
1336         return BLKPREP_OK;
1337 }
1338
1339 /*
1340  * Most of the SCSI commands are supported directly by ATAPI devices.
1341  * This transform handles the few exceptions.
1342  */
1343 static int ide_cdrom_prep_pc(struct request *rq)
1344 {
1345         u8 *c = rq->cmd;
1346
1347         /* transform 6-byte read/write commands to the 10-byte version */
1348         if (c[0] == READ_6 || c[0] == WRITE_6) {
1349                 c[8] = c[4];
1350                 c[5] = c[3];
1351                 c[4] = c[2];
1352                 c[3] = c[1] & 0x1f;
1353                 c[2] = 0;
1354                 c[1] &= 0xe0;
1355                 c[0] += (READ_10 - READ_6);
1356                 rq->cmd_len = 10;
1357                 return BLKPREP_OK;
1358         }
1359
1360         /*
1361          * it's silly to pretend we understand 6-byte sense commands, just
1362          * reject with ILLEGAL_REQUEST and the caller should take the
1363          * appropriate action
1364          */
1365         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1366                 rq->errors = ILLEGAL_REQUEST;
1367                 return BLKPREP_KILL;
1368         }
1369
1370         return BLKPREP_OK;
1371 }
1372
1373 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1374 {
1375         if (rq->cmd_type == REQ_TYPE_FS)
1376                 return ide_cdrom_prep_fs(q, rq);
1377         else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1378                 return ide_cdrom_prep_pc(rq);
1379
1380         return 0;
1381 }
1382
1383 struct cd_list_entry {
1384         const char      *id_model;
1385         const char      *id_firmware;
1386         unsigned int    cd_flags;
1387 };
1388
1389 #ifdef CONFIG_IDE_PROC_FS
1390 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1391 {
1392         unsigned long capacity, sectors_per_frame;
1393
1394         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1395                 return 0;
1396
1397         return capacity * sectors_per_frame;
1398 }
1399
1400 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1401 {
1402         ide_drive_t *drive = m->private;
1403
1404         seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1405         return 0;
1406 }
1407
1408 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1409 {
1410         return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1411 }
1412
1413 static const struct file_operations idecd_capacity_proc_fops = {
1414         .owner          = THIS_MODULE,
1415         .open           = idecd_capacity_proc_open,
1416         .read           = seq_read,
1417         .llseek         = seq_lseek,
1418         .release        = single_release,
1419 };
1420
1421 static ide_proc_entry_t idecd_proc[] = {
1422         { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1423         {}
1424 };
1425
1426 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1427 {
1428         return idecd_proc;
1429 }
1430
1431 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1432 {
1433         return NULL;
1434 }
1435 #endif
1436
1437 static const struct cd_list_entry ide_cd_quirks_list[] = {
1438         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1439         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1440         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1441         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1442                                              IDE_AFLAG_PRE_ATAPI12,          },
1443         /* Vertos 300, some versions of this drive like to talk BCD. */
1444         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1445         /* Vertos 600 ESD. */
1446         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1447         /*
1448          * Sanyo 3 CD changer uses a non-standard command for CD changing
1449          * (by default standard ATAPI support for CD changers is used).
1450          */
1451         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1452         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1453         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1454         /* Stingray 8X CD-ROM. */
1455         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1456         /*
1457          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1458          * mode sense page capabilities size, but older drives break.
1459          */
1460         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1461         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1462         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1463         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1464         /*
1465          * Some drives used by Apple don't advertise audio play
1466          * but they do support reading TOC & audio datas.
1467          */
1468         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1469         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1470         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1471         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1472         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1473         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1474         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1475         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1476         { NULL, NULL, 0 }
1477 };
1478
1479 static unsigned int ide_cd_flags(u16 *id)
1480 {
1481         const struct cd_list_entry *cle = ide_cd_quirks_list;
1482
1483         while (cle->id_model) {
1484                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1485                     (cle->id_firmware == NULL ||
1486                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1487                         return cle->cd_flags;
1488                 cle++;
1489         }
1490
1491         return 0;
1492 }
1493
1494 static int ide_cdrom_setup(ide_drive_t *drive)
1495 {
1496         struct cdrom_info *cd = drive->driver_data;
1497         struct cdrom_device_info *cdi = &cd->devinfo;
1498         struct request_queue *q = drive->queue;
1499         u16 *id = drive->id;
1500         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1501         int nslots;
1502
1503         ide_debug_log(IDE_DBG_PROBE, "enter");
1504
1505         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1506         blk_queue_dma_alignment(q, 31);
1507         blk_queue_update_dma_pad(q, 15);
1508
1509         q->unplug_delay = max((1 * HZ) / 1000, 1);
1510
1511         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1512         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1513
1514         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1515             fw_rev[4] == '1' && fw_rev[6] <= '2')
1516                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1517                                      IDE_AFLAG_TOCADDR_AS_BCD);
1518         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1519                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1520                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1521         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1522                 /* 3 => use CD in slot 0 */
1523                 cdi->sanyo_slot = 3;
1524
1525         nslots = ide_cdrom_probe_capabilities(drive);
1526
1527         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1528
1529         if (ide_cdrom_register(drive, nslots)) {
1530                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1531                                 " cdrom driver.\n", drive->name, __func__);
1532                 cd->devinfo.handle = NULL;
1533                 return 1;
1534         }
1535
1536         ide_proc_register_driver(drive, cd->driver);
1537         return 0;
1538 }
1539
1540 static void ide_cd_remove(ide_drive_t *drive)
1541 {
1542         struct cdrom_info *info = drive->driver_data;
1543
1544         ide_debug_log(IDE_DBG_FUNC, "enter");
1545
1546         ide_proc_unregister_driver(drive, info->driver);
1547         device_del(&info->dev);
1548         del_gendisk(info->disk);
1549
1550         mutex_lock(&idecd_ref_mutex);
1551         put_device(&info->dev);
1552         mutex_unlock(&idecd_ref_mutex);
1553 }
1554
1555 static void ide_cd_release(struct device *dev)
1556 {
1557         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1558         struct cdrom_device_info *devinfo = &info->devinfo;
1559         ide_drive_t *drive = info->drive;
1560         struct gendisk *g = info->disk;
1561
1562         ide_debug_log(IDE_DBG_FUNC, "enter");
1563
1564         kfree(info->toc);
1565         if (devinfo->handle == drive)
1566                 unregister_cdrom(devinfo);
1567         drive->driver_data = NULL;
1568         blk_queue_prep_rq(drive->queue, NULL);
1569         g->private_data = NULL;
1570         put_disk(g);
1571         kfree(info);
1572 }
1573
1574 static int ide_cd_probe(ide_drive_t *);
1575
1576 static struct ide_driver ide_cdrom_driver = {
1577         .gen_driver = {
1578                 .owner          = THIS_MODULE,
1579                 .name           = "ide-cdrom",
1580                 .bus            = &ide_bus_type,
1581         },
1582         .probe                  = ide_cd_probe,
1583         .remove                 = ide_cd_remove,
1584         .version                = IDECD_VERSION,
1585         .do_request             = ide_cd_do_request,
1586 #ifdef CONFIG_IDE_PROC_FS
1587         .proc_entries           = ide_cd_proc_entries,
1588         .proc_devsets           = ide_cd_proc_devsets,
1589 #endif
1590 };
1591
1592 static int idecd_open(struct block_device *bdev, fmode_t mode)
1593 {
1594         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1595         int rc = -ENOMEM;
1596
1597         if (!info)
1598                 return -ENXIO;
1599
1600         rc = cdrom_open(&info->devinfo, bdev, mode);
1601
1602         if (rc < 0)
1603                 ide_cd_put(info);
1604
1605         return rc;
1606 }
1607
1608 static int idecd_release(struct gendisk *disk, fmode_t mode)
1609 {
1610         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1611
1612         cdrom_release(&info->devinfo, mode);
1613
1614         ide_cd_put(info);
1615
1616         return 0;
1617 }
1618
1619 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1620 {
1621         struct packet_command cgc;
1622         char buffer[16];
1623         int stat;
1624         char spindown;
1625
1626         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1627                 return -EFAULT;
1628
1629         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1630
1631         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1632         if (stat)
1633                 return stat;
1634
1635         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1636         return cdrom_mode_select(cdi, &cgc);
1637 }
1638
1639 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1640 {
1641         struct packet_command cgc;
1642         char buffer[16];
1643         int stat;
1644         char spindown;
1645
1646         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1647
1648         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1649         if (stat)
1650                 return stat;
1651
1652         spindown = buffer[11] & 0x0f;
1653         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1654                 return -EFAULT;
1655         return 0;
1656 }
1657
1658 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1659                         unsigned int cmd, unsigned long arg)
1660 {
1661         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1662         int err;
1663
1664         switch (cmd) {
1665         case CDROMSETSPINDOWN:
1666                 return idecd_set_spindown(&info->devinfo, arg);
1667         case CDROMGETSPINDOWN:
1668                 return idecd_get_spindown(&info->devinfo, arg);
1669         default:
1670                 break;
1671         }
1672
1673         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1674         if (err == -EINVAL)
1675                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1676
1677         return err;
1678 }
1679
1680 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1681                              unsigned int cmd, unsigned long arg)
1682 {
1683         int ret;
1684
1685         lock_kernel();
1686         ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1687         unlock_kernel();
1688
1689         return ret;
1690 }
1691
1692
1693 static int idecd_media_changed(struct gendisk *disk)
1694 {
1695         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1696         return cdrom_media_changed(&info->devinfo);
1697 }
1698
1699 static int idecd_revalidate_disk(struct gendisk *disk)
1700 {
1701         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1702         struct request_sense sense;
1703
1704         ide_cd_read_toc(info->drive, &sense);
1705
1706         return  0;
1707 }
1708
1709 static const struct block_device_operations idecd_ops = {
1710         .owner                  = THIS_MODULE,
1711         .open                   = idecd_open,
1712         .release                = idecd_release,
1713         .ioctl                  = idecd_ioctl,
1714         .media_changed          = idecd_media_changed,
1715         .revalidate_disk        = idecd_revalidate_disk
1716 };
1717
1718 /* module options */
1719 static unsigned long debug_mask;
1720 module_param(debug_mask, ulong, 0644);
1721
1722 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1723
1724 static int ide_cd_probe(ide_drive_t *drive)
1725 {
1726         struct cdrom_info *info;
1727         struct gendisk *g;
1728         struct request_sense sense;
1729
1730         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1731                                      drive->driver_req, drive->media);
1732
1733         if (!strstr("ide-cdrom", drive->driver_req))
1734                 goto failed;
1735
1736         if (drive->media != ide_cdrom && drive->media != ide_optical)
1737                 goto failed;
1738
1739         drive->debug_mask = debug_mask;
1740         drive->irq_handler = cdrom_newpc_intr;
1741
1742         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1743         if (info == NULL) {
1744                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1745                                 drive->name);
1746                 goto failed;
1747         }
1748
1749         g = alloc_disk(1 << PARTN_BITS);
1750         if (!g)
1751                 goto out_free_cd;
1752
1753         ide_init_disk(g, drive);
1754
1755         info->dev.parent = &drive->gendev;
1756         info->dev.release = ide_cd_release;
1757         dev_set_name(&info->dev, dev_name(&drive->gendev));
1758
1759         if (device_register(&info->dev))
1760                 goto out_free_disk;
1761
1762         info->drive = drive;
1763         info->driver = &ide_cdrom_driver;
1764         info->disk = g;
1765
1766         g->private_data = &info->driver;
1767
1768         drive->driver_data = info;
1769
1770         g->minors = 1;
1771         g->driverfs_dev = &drive->gendev;
1772         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1773         if (ide_cdrom_setup(drive)) {
1774                 put_device(&info->dev);
1775                 goto failed;
1776         }
1777
1778         ide_cd_read_toc(drive, &sense);
1779         g->fops = &idecd_ops;
1780         g->flags |= GENHD_FL_REMOVABLE;
1781         add_disk(g);
1782         return 0;
1783
1784 out_free_disk:
1785         put_disk(g);
1786 out_free_cd:
1787         kfree(info);
1788 failed:
1789         return -ENODEV;
1790 }
1791
1792 static void __exit ide_cdrom_exit(void)
1793 {
1794         driver_unregister(&ide_cdrom_driver.gen_driver);
1795 }
1796
1797 static int __init ide_cdrom_init(void)
1798 {
1799         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1800         return driver_register(&ide_cdrom_driver.gen_driver);
1801 }
1802
1803 MODULE_ALIAS("ide:*m-cdrom*");
1804 MODULE_ALIAS("ide-cd");
1805 module_init(ide_cdrom_init);
1806 module_exit(ide_cdrom_exit);
1807 MODULE_LICENSE("GPL");