block: Do away with the notion of hardsect_size
[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/slab.h>
34 #include <linux/interrupt.h>
35 #include <linux/errno.h>
36 #include <linux/cdrom.h>
37 #include <linux/ide.h>
38 #include <linux/completion.h>
39 #include <linux/mutex.h>
40 #include <linux/bcd.h>
41
42 /* For SCSI -> ATAPI command conversion */
43 #include <scsi/scsi.h>
44
45 #include <linux/irq.h>
46 #include <linux/io.h>
47 #include <asm/byteorder.h>
48 #include <linux/uaccess.h>
49 #include <asm/unaligned.h>
50
51 #include "ide-cd.h"
52
53 static DEFINE_MUTEX(idecd_ref_mutex);
54
55 static void ide_cd_release(struct device *);
56
57 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
58 {
59         struct cdrom_info *cd = NULL;
60
61         mutex_lock(&idecd_ref_mutex);
62         cd = ide_drv_g(disk, cdrom_info);
63         if (cd) {
64                 if (ide_device_get(cd->drive))
65                         cd = NULL;
66                 else
67                         get_device(&cd->dev);
68
69         }
70         mutex_unlock(&idecd_ref_mutex);
71         return cd;
72 }
73
74 static void ide_cd_put(struct cdrom_info *cd)
75 {
76         ide_drive_t *drive = cd->drive;
77
78         mutex_lock(&idecd_ref_mutex);
79         put_device(&cd->dev);
80         ide_device_put(drive);
81         mutex_unlock(&idecd_ref_mutex);
82 }
83
84 /*
85  * Generic packet command support and error handling routines.
86  */
87
88 /* Mark that we've seen a media change and invalidate our internal buffers. */
89 static void cdrom_saw_media_change(ide_drive_t *drive)
90 {
91         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
92         drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
93 }
94
95 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
96                            struct request_sense *sense)
97 {
98         int log = 0;
99
100         ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
101
102         if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
103                 return 0;
104
105         switch (sense->sense_key) {
106         case NO_SENSE:
107         case RECOVERED_ERROR:
108                 break;
109         case NOT_READY:
110                 /*
111                  * don't care about tray state messages for e.g. capacity
112                  * commands or in-progress or becoming ready
113                  */
114                 if (sense->asc == 0x3a || sense->asc == 0x04)
115                         break;
116                 log = 1;
117                 break;
118         case ILLEGAL_REQUEST:
119                 /*
120                  * don't log START_STOP unit with LoEj set, since we cannot
121                  * reliably check if drive can auto-close
122                  */
123                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
124                         break;
125                 log = 1;
126                 break;
127         case UNIT_ATTENTION:
128                 /*
129                  * Make good and sure we've seen this potential media change.
130                  * Some drives (i.e. Creative) fail to present the correct sense
131                  * key in the error register.
132                  */
133                 cdrom_saw_media_change(drive);
134                 break;
135         default:
136                 log = 1;
137                 break;
138         }
139         return log;
140 }
141
142 static void cdrom_analyze_sense_data(ide_drive_t *drive,
143                               struct request *failed_command,
144                               struct request_sense *sense)
145 {
146         unsigned long sector;
147         unsigned long bio_sectors;
148         struct cdrom_info *info = drive->driver_data;
149
150         ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
151                                      sense->error_code, sense->sense_key);
152
153         if (failed_command)
154                 ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
155                                              failed_command->cmd[0]);
156
157         if (!cdrom_log_sense(drive, failed_command, sense))
158                 return;
159
160         /*
161          * If a read toc is executed for a CD-R or CD-RW medium where the first
162          * toc has not been recorded yet, it will fail with 05/24/00 (which is a
163          * confusing error)
164          */
165         if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
166                 if (sense->sense_key == 0x05 && sense->asc == 0x24)
167                         return;
168
169         /* current error */
170         if (sense->error_code == 0x70) {
171                 switch (sense->sense_key) {
172                 case MEDIUM_ERROR:
173                 case VOLUME_OVERFLOW:
174                 case ILLEGAL_REQUEST:
175                         if (!sense->valid)
176                                 break;
177                         if (failed_command == NULL ||
178                                         !blk_fs_request(failed_command))
179                                 break;
180                         sector = (sense->information[0] << 24) |
181                                  (sense->information[1] << 16) |
182                                  (sense->information[2] <<  8) |
183                                  (sense->information[3]);
184
185                         if (queue_logical_block_size(drive->queue) == 2048)
186                                 /* device sector size is 2K */
187                                 sector <<= 2;
188
189                         bio_sectors = max(bio_sectors(failed_command->bio), 4U);
190                         sector &= ~(bio_sectors - 1);
191
192                         /*
193                          * The SCSI specification allows for the value
194                          * returned by READ CAPACITY to be up to 75 2K
195                          * sectors past the last readable block.
196                          * Therefore, if we hit a medium error within the
197                          * last 75 2K sectors, we decrease the saved size
198                          * value.
199                          */
200                         if (sector < get_capacity(info->disk) &&
201                             drive->probed_capacity - sector < 4 * 75)
202                                 set_capacity(info->disk, sector);
203                 }
204         }
205
206         ide_cd_log_error(drive->name, failed_command, sense);
207 }
208
209 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
210 {
211         /*
212          * For REQ_TYPE_SENSE, "rq->special" points to the original
213          * failed request.  Also, the sense data should be read
214          * directly from rq which might be different from the original
215          * sense buffer if it got copied during mapping.
216          */
217         struct request *failed = (struct request *)rq->special;
218         void *sense = bio_data(rq->bio);
219
220         if (failed) {
221                 if (failed->sense) {
222                         /*
223                          * Sense is always read into drive->sense_data.
224                          * Copy back if the failed request has its
225                          * sense pointer set.
226                          */
227                         memcpy(failed->sense, sense, 18);
228                         sense = failed->sense;
229                         failed->sense_len = rq->sense_len;
230                 }
231                 cdrom_analyze_sense_data(drive, failed, sense);
232
233                 if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
234                         BUG();
235         } else
236                 cdrom_analyze_sense_data(drive, NULL, sense);
237 }
238
239
240 /*
241  * Allow the drive 5 seconds to recover; some devices will return NOT_READY
242  * while flushing data from cache.
243  *
244  * returns: 0 failed (write timeout expired)
245  *          1 success
246  */
247 static int ide_cd_breathe(ide_drive_t *drive, struct request *rq)
248 {
249
250         struct cdrom_info *info = drive->driver_data;
251
252         if (!rq->errors)
253                 info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
254
255         rq->errors = 1;
256
257         if (time_after(jiffies, info->write_timeout))
258                 return 0;
259         else {
260                 struct request_queue *q = drive->queue;
261                 unsigned long flags;
262
263                 /*
264                  * take a breather relying on the unplug timer to kick us again
265                  */
266
267                 spin_lock_irqsave(q->queue_lock, flags);
268                 blk_plug_device(q);
269                 spin_unlock_irqrestore(q->queue_lock, flags);
270
271                 return 1;
272         }
273 }
274
275 /**
276  * Returns:
277  * 0: if the request should be continued.
278  * 1: if the request will be going through error recovery.
279  * 2: if the request should be ended.
280  */
281 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
282 {
283         ide_hwif_t *hwif = drive->hwif;
284         struct request *rq = hwif->rq;
285         int err, sense_key, do_end_request = 0;
286
287         /* get the IDE error register */
288         err = ide_read_error(drive);
289         sense_key = err >> 4;
290
291         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
292                                   "stat 0x%x",
293                                   rq->cmd[0], rq->cmd_type, err, stat);
294
295         if (blk_sense_request(rq)) {
296                 /*
297                  * We got an error trying to get sense info from the drive
298                  * (probably while trying to recover from a former error).
299                  * Just give up.
300                  */
301                 rq->cmd_flags |= REQ_FAILED;
302                 return 2;
303         }
304
305         /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
306         if (blk_pc_request(rq) && !rq->errors)
307                 rq->errors = SAM_STAT_CHECK_CONDITION;
308
309         if (blk_noretry_request(rq))
310                 do_end_request = 1;
311
312         switch (sense_key) {
313         case NOT_READY:
314                 if (blk_fs_request(rq) && rq_data_dir(rq) == WRITE) {
315                         if (ide_cd_breathe(drive, rq))
316                                 return 1;
317                 } else {
318                         cdrom_saw_media_change(drive);
319
320                         if (blk_fs_request(rq) && !blk_rq_quiet(rq))
321                                 printk(KERN_ERR PFX "%s: tray open\n",
322                                         drive->name);
323                 }
324                 do_end_request = 1;
325                 break;
326         case UNIT_ATTENTION:
327                 cdrom_saw_media_change(drive);
328
329                 if (blk_fs_request(rq) == 0)
330                         return 0;
331
332                 /*
333                  * Arrange to retry the request but be sure to give up if we've
334                  * retried too many times.
335                  */
336                 if (++rq->errors > ERROR_MAX)
337                         do_end_request = 1;
338                 break;
339         case ILLEGAL_REQUEST:
340                 /*
341                  * Don't print error message for this condition -- SFF8090i
342                  * indicates that 5/24/00 is the correct response to a request
343                  * to close the tray if the drive doesn't have that capability.
344                  *
345                  * cdrom_log_sense() knows this!
346                  */
347                 if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
348                         break;
349                 /* fall-through */
350         case DATA_PROTECT:
351                 /*
352                  * No point in retrying after an illegal request or data
353                  * protect error.
354                  */
355                 if (!blk_rq_quiet(rq))
356                         ide_dump_status(drive, "command error", stat);
357                 do_end_request = 1;
358                 break;
359         case MEDIUM_ERROR:
360                 /*
361                  * No point in re-trying a zillion times on a bad sector.
362                  * If we got here the error is not correctable.
363                  */
364                 if (!blk_rq_quiet(rq))
365                         ide_dump_status(drive, "media error "
366                                         "(bad sector)", stat);
367                 do_end_request = 1;
368                 break;
369         case BLANK_CHECK:
370                 /* disk appears blank? */
371                 if (!blk_rq_quiet(rq))
372                         ide_dump_status(drive, "media error (blank)",
373                                         stat);
374                 do_end_request = 1;
375                 break;
376         default:
377                 if (blk_fs_request(rq) == 0)
378                         break;
379                 if (err & ~ATA_ABORTED) {
380                         /* go to the default handler for other errors */
381                         ide_error(drive, "cdrom_decode_status", stat);
382                         return 1;
383                 } else if (++rq->errors > ERROR_MAX)
384                         /* we've racked up too many retries, abort */
385                         do_end_request = 1;
386         }
387
388         if (blk_fs_request(rq) == 0) {
389                 rq->cmd_flags |= REQ_FAILED;
390                 do_end_request = 1;
391         }
392
393         /*
394          * End a request through request sense analysis when we have sense data.
395          * We need this in order to perform end of media processing.
396          */
397         if (do_end_request)
398                 goto end_request;
399
400         /* if we got a CHECK_CONDITION status, queue a request sense command */
401         if (stat & ATA_ERR)
402                 return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
403         return 1;
404
405 end_request:
406         if (stat & ATA_ERR) {
407                 hwif->rq = NULL;
408                 return ide_queue_sense_rq(drive, rq) ? 2 : 1;
409         } else
410                 return 2;
411 }
412
413 /*
414  * Check the contents of the interrupt reason register from the cdrom
415  * and attempt to recover if there are problems.  Returns  0 if everything's
416  * ok; nonzero if the request has been terminated.
417  */
418 static int ide_cd_check_ireason(ide_drive_t *drive, struct request *rq,
419                                 int len, int ireason, int rw)
420 {
421         ide_hwif_t *hwif = drive->hwif;
422
423         ide_debug_log(IDE_DBG_FUNC, "ireason: 0x%x, rw: 0x%x", ireason, rw);
424
425         /*
426          * ireason == 0: the drive wants to receive data from us
427          * ireason == 2: the drive is expecting to transfer data to us
428          */
429         if (ireason == (!rw << 1))
430                 return 0;
431         else if (ireason == (rw << 1)) {
432
433                 /* whoops... */
434                 printk(KERN_ERR PFX "%s: %s: wrong transfer direction!\n",
435                                 drive->name, __func__);
436
437                 ide_pad_transfer(drive, rw, len);
438         } else  if (rw == 0 && ireason == 1) {
439                 /*
440                  * Some drives (ASUS) seem to tell us that status info is
441                  * available.  Just get it and ignore.
442                  */
443                 (void)hwif->tp_ops->read_status(hwif);
444                 return 0;
445         } else {
446                 /* drive wants a command packet, or invalid ireason... */
447                 printk(KERN_ERR PFX "%s: %s: bad interrupt reason 0x%02x\n",
448                                 drive->name, __func__, ireason);
449         }
450
451         if (rq->cmd_type == REQ_TYPE_ATA_PC)
452                 rq->cmd_flags |= REQ_FAILED;
453
454         return -1;
455 }
456
457 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
458 {
459         struct request *rq = cmd->rq;
460
461         ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
462
463         /*
464          * Some of the trailing request sense fields are optional,
465          * and some drives don't send them.  Sigh.
466          */
467         if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
468             cmd->nleft > 0 && cmd->nleft <= 5)
469                 cmd->nleft = 0;
470 }
471
472 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
473                     int write, void *buffer, unsigned *bufflen,
474                     struct request_sense *sense, int timeout,
475                     unsigned int cmd_flags)
476 {
477         struct cdrom_info *info = drive->driver_data;
478         struct request_sense local_sense;
479         int retries = 10;
480         unsigned int flags = 0;
481
482         if (!sense)
483                 sense = &local_sense;
484
485         ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
486                                   "cmd_flags: 0x%x",
487                                   cmd[0], write, timeout, cmd_flags);
488
489         /* start of retry loop */
490         do {
491                 struct request *rq;
492                 int error;
493
494                 rq = blk_get_request(drive->queue, write, __GFP_WAIT);
495
496                 memcpy(rq->cmd, cmd, BLK_MAX_CDB);
497                 rq->cmd_type = REQ_TYPE_ATA_PC;
498                 rq->sense = sense;
499                 rq->cmd_flags |= cmd_flags;
500                 rq->timeout = timeout;
501                 if (buffer) {
502                         error = blk_rq_map_kern(drive->queue, rq, buffer,
503                                                 *bufflen, GFP_NOIO);
504                         if (error) {
505                                 blk_put_request(rq);
506                                 return error;
507                         }
508                 }
509
510                 error = blk_execute_rq(drive->queue, info->disk, rq, 0);
511
512                 if (buffer)
513                         *bufflen = rq->resid_len;
514
515                 flags = rq->cmd_flags;
516                 blk_put_request(rq);
517
518                 /*
519                  * FIXME: we should probably abort/retry or something in case of
520                  * failure.
521                  */
522                 if (flags & REQ_FAILED) {
523                         /*
524                          * The request failed.  Retry if it was due to a unit
525                          * attention status (usually means media was changed).
526                          */
527                         struct request_sense *reqbuf = sense;
528
529                         if (reqbuf->sense_key == UNIT_ATTENTION)
530                                 cdrom_saw_media_change(drive);
531                         else if (reqbuf->sense_key == NOT_READY &&
532                                  reqbuf->asc == 4 && reqbuf->ascq != 4) {
533                                 /*
534                                  * The drive is in the process of loading
535                                  * a disk.  Retry, but wait a little to give
536                                  * the drive time to complete the load.
537                                  */
538                                 ssleep(2);
539                         } else {
540                                 /* otherwise, don't retry */
541                                 retries = 0;
542                         }
543                         --retries;
544                 }
545
546                 /* end of retry loop */
547         } while ((flags & REQ_FAILED) && retries >= 0);
548
549         /* return an error if the command failed */
550         return (flags & REQ_FAILED) ? -EIO : 0;
551 }
552
553 static void ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
554 {
555         unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
556
557         if (cmd->tf_flags & IDE_TFLAG_WRITE)
558                 nr_bytes -= cmd->last_xfer_len;
559
560         if (nr_bytes > 0)
561                 ide_complete_rq(drive, 0, nr_bytes);
562 }
563
564 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
565 {
566         ide_hwif_t *hwif = drive->hwif;
567         struct ide_cmd *cmd = &hwif->cmd;
568         struct request *rq = hwif->rq;
569         ide_expiry_t *expiry = NULL;
570         int dma_error = 0, dma, thislen, uptodate = 0;
571         int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
572         int sense = blk_sense_request(rq);
573         unsigned int timeout;
574         u16 len;
575         u8 ireason, stat;
576
577         ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
578
579         /* check for errors */
580         dma = drive->dma;
581         if (dma) {
582                 drive->dma = 0;
583                 drive->waiting_for_dma = 0;
584                 dma_error = hwif->dma_ops->dma_end(drive);
585                 ide_dma_unmap_sg(drive, cmd);
586                 if (dma_error) {
587                         printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
588                                         write ? "write" : "read");
589                         ide_dma_off(drive);
590                 }
591         }
592
593         /* check status */
594         stat = hwif->tp_ops->read_status(hwif);
595
596         if (!OK_STAT(stat, 0, BAD_R_STAT)) {
597                 rc = cdrom_decode_status(drive, stat);
598                 if (rc) {
599                         if (rc == 2)
600                                 goto out_end;
601                         return ide_stopped;
602                 }
603         }
604
605         /* using dma, transfer is complete now */
606         if (dma) {
607                 if (dma_error)
608                         return ide_error(drive, "dma error", stat);
609                 uptodate = 1;
610                 goto out_end;
611         }
612
613         ide_read_bcount_and_ireason(drive, &len, &ireason);
614
615         thislen = blk_fs_request(rq) ? len : cmd->nleft;
616         if (thislen > len)
617                 thislen = len;
618
619         ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
620                                   stat, thislen);
621
622         /* If DRQ is clear, the command has completed. */
623         if ((stat & ATA_DRQ) == 0) {
624                 if (blk_fs_request(rq)) {
625                         /*
626                          * If we're not done reading/writing, complain.
627                          * Otherwise, complete the command normally.
628                          */
629                         uptodate = 1;
630                         if (cmd->nleft > 0) {
631                                 printk(KERN_ERR PFX "%s: %s: data underrun "
632                                         "(%u bytes)\n", drive->name, __func__,
633                                         cmd->nleft);
634                                 if (!write)
635                                         rq->cmd_flags |= REQ_FAILED;
636                                 uptodate = 0;
637                         }
638                 } else if (!blk_pc_request(rq)) {
639                         ide_cd_request_sense_fixup(drive, cmd);
640                         /* complain if we still have data left to transfer */
641                         uptodate = cmd->nleft ? 0 : 1;
642                         if (uptodate == 0)
643                                 rq->cmd_flags |= REQ_FAILED;
644                 }
645                 goto out_end;
646         }
647
648         /* check which way to transfer data */
649         rc = ide_cd_check_ireason(drive, rq, len, ireason, write);
650         if (rc)
651                 goto out_end;
652
653         cmd->last_xfer_len = 0;
654
655         ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
656                                   "ireason: 0x%x",
657                                   rq->cmd_type, ireason);
658
659         /* transfer data */
660         while (thislen > 0) {
661                 int blen = min_t(int, thislen, cmd->nleft);
662
663                 if (cmd->nleft == 0)
664                         break;
665
666                 ide_pio_bytes(drive, cmd, write, blen);
667                 cmd->last_xfer_len += blen;
668
669                 thislen -= blen;
670                 len -= blen;
671
672                 if (sense && write == 0)
673                         rq->sense_len += blen;
674         }
675
676         /* pad, if necessary */
677         if (len > 0) {
678                 if (blk_fs_request(rq) == 0 || write == 0)
679                         ide_pad_transfer(drive, write, len);
680                 else {
681                         printk(KERN_ERR PFX "%s: confused, missing data\n",
682                                 drive->name);
683                         blk_dump_rq_flags(rq, "cdrom_newpc_intr");
684                 }
685         }
686
687         if (blk_pc_request(rq)) {
688                 timeout = rq->timeout;
689         } else {
690                 timeout = ATAPI_WAIT_PC;
691                 if (!blk_fs_request(rq))
692                         expiry = ide_cd_expiry;
693         }
694
695         hwif->expiry = expiry;
696         ide_set_handler(drive, cdrom_newpc_intr, timeout);
697         return ide_started;
698
699 out_end:
700         if (blk_pc_request(rq) && rc == 0) {
701                 rq->resid_len = 0;
702                 blk_end_request_all(rq, 0);
703                 hwif->rq = NULL;
704         } else {
705                 if (sense && uptodate)
706                         ide_cd_complete_failed_rq(drive, rq);
707
708                 if (blk_fs_request(rq)) {
709                         if (cmd->nleft == 0)
710                                 uptodate = 1;
711                 } else {
712                         if (uptodate <= 0 && rq->errors == 0)
713                                 rq->errors = -EIO;
714                 }
715
716                 if (uptodate == 0)
717                         ide_cd_error_cmd(drive, cmd);
718
719                 /* make sure it's fully ended */
720                 if (blk_fs_request(rq) == 0) {
721                         rq->resid_len -= cmd->nbytes - cmd->nleft;
722                         if (uptodate == 0 && (cmd->tf_flags & IDE_TFLAG_WRITE))
723                                 rq->resid_len += cmd->last_xfer_len;
724                 }
725
726                 ide_complete_rq(drive, uptodate ? 0 : -EIO, blk_rq_bytes(rq));
727
728                 if (sense && rc == 2)
729                         ide_error(drive, "request sense failure", stat);
730         }
731         return ide_stopped;
732 }
733
734 static ide_startstop_t cdrom_start_rw(ide_drive_t *drive, struct request *rq)
735 {
736         struct cdrom_info *cd = drive->driver_data;
737         struct request_queue *q = drive->queue;
738         int write = rq_data_dir(rq) == WRITE;
739         unsigned short sectors_per_frame =
740                 queue_logical_block_size(q) >> SECTOR_BITS;
741
742         ide_debug_log(IDE_DBG_RQ, "rq->cmd[0]: 0x%x, rq->cmd_flags: 0x%x, "
743                                   "secs_per_frame: %u",
744                                   rq->cmd[0], rq->cmd_flags, sectors_per_frame);
745
746         if (write) {
747                 /* disk has become write protected */
748                 if (get_disk_ro(cd->disk))
749                         return ide_stopped;
750         } else {
751                 /*
752                  * We may be retrying this request after an error.  Fix up any
753                  * weirdness which might be present in the request packet.
754                  */
755                 q->prep_rq_fn(q, rq);
756         }
757
758         /* fs requests *must* be hardware frame aligned */
759         if ((blk_rq_sectors(rq) & (sectors_per_frame - 1)) ||
760             (blk_rq_pos(rq) & (sectors_per_frame - 1)))
761                 return ide_stopped;
762
763         /* use DMA, if possible */
764         drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
765
766         if (write)
767                 cd->devinfo.media_written = 1;
768
769         rq->timeout = ATAPI_WAIT_PC;
770
771         return ide_started;
772 }
773
774 static void cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
775 {
776
777         ide_debug_log(IDE_DBG_PC, "rq->cmd[0]: 0x%x, rq->cmd_type: 0x%x",
778                                   rq->cmd[0], rq->cmd_type);
779
780         if (blk_pc_request(rq))
781                 rq->cmd_flags |= REQ_QUIET;
782         else
783                 rq->cmd_flags &= ~REQ_FAILED;
784
785         drive->dma = 0;
786
787         /* sg request */
788         if (rq->bio) {
789                 struct request_queue *q = drive->queue;
790                 char *buf = bio_data(rq->bio);
791                 unsigned int alignment;
792
793                 drive->dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA);
794
795                 /*
796                  * check if dma is safe
797                  *
798                  * NOTE! The "len" and "addr" checks should possibly have
799                  * separate masks.
800                  */
801                 alignment = queue_dma_alignment(q) | q->dma_pad_mask;
802                 if ((unsigned long)buf & alignment
803                     || blk_rq_bytes(rq) & q->dma_pad_mask
804                     || object_is_on_stack(buf))
805                         drive->dma = 0;
806         }
807 }
808
809 static ide_startstop_t ide_cd_do_request(ide_drive_t *drive, struct request *rq,
810                                         sector_t block)
811 {
812         struct ide_cmd cmd;
813         int uptodate = 0, nsectors;
814
815         ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
816                                   rq->cmd[0], (unsigned long long)block);
817
818         if (drive->debug_mask & IDE_DBG_RQ)
819                 blk_dump_rq_flags(rq, "ide_cd_do_request");
820
821         if (blk_fs_request(rq)) {
822                 if (cdrom_start_rw(drive, rq) == ide_stopped)
823                         goto out_end;
824         } else if (blk_sense_request(rq) || blk_pc_request(rq) ||
825                    rq->cmd_type == REQ_TYPE_ATA_PC) {
826                 if (!rq->timeout)
827                         rq->timeout = ATAPI_WAIT_PC;
828
829                 cdrom_do_block_pc(drive, rq);
830         } else if (blk_special_request(rq)) {
831                 /* right now this can only be a reset... */
832                 uptodate = 1;
833                 goto out_end;
834         } else {
835                 blk_dump_rq_flags(rq, DRV_NAME " bad flags");
836                 if (rq->errors == 0)
837                         rq->errors = -EIO;
838                 goto out_end;
839         }
840
841         /* prepare sense request for this command */
842         ide_prep_sense(drive, rq);
843
844         memset(&cmd, 0, sizeof(cmd));
845
846         if (rq_data_dir(rq))
847                 cmd.tf_flags |= IDE_TFLAG_WRITE;
848
849         cmd.rq = rq;
850
851         if (blk_fs_request(rq) || blk_rq_bytes(rq)) {
852                 ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
853                 ide_map_sg(drive, &cmd);
854         }
855
856         return ide_issue_pc(drive, &cmd);
857 out_end:
858         nsectors = blk_rq_sectors(rq);
859
860         if (nsectors == 0)
861                 nsectors = 1;
862
863         ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
864
865         return ide_stopped;
866 }
867
868 /*
869  * Ioctl handling.
870  *
871  * Routines which queue packet commands take as a final argument a pointer to a
872  * request_sense struct. If execution of the command results in an error with a
873  * CHECK CONDITION status, this structure will be filled with the results of the
874  * subsequent request sense command. The pointer can also be NULL, in which case
875  * no sense information is returned.
876  */
877 static void msf_from_bcd(struct atapi_msf *msf)
878 {
879         msf->minute = bcd2bin(msf->minute);
880         msf->second = bcd2bin(msf->second);
881         msf->frame  = bcd2bin(msf->frame);
882 }
883
884 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
885 {
886         struct cdrom_info *info = drive->driver_data;
887         struct cdrom_device_info *cdi = &info->devinfo;
888         unsigned char cmd[BLK_MAX_CDB];
889
890         ide_debug_log(IDE_DBG_FUNC, "enter");
891
892         memset(cmd, 0, BLK_MAX_CDB);
893         cmd[0] = GPCMD_TEST_UNIT_READY;
894
895         /*
896          * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
897          * instead of supporting the LOAD_UNLOAD opcode.
898          */
899         cmd[7] = cdi->sanyo_slot % 3;
900
901         return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
902 }
903
904 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
905                                unsigned long *sectors_per_frame,
906                                struct request_sense *sense)
907 {
908         struct {
909                 __be32 lba;
910                 __be32 blocklen;
911         } capbuf;
912
913         int stat;
914         unsigned char cmd[BLK_MAX_CDB];
915         unsigned len = sizeof(capbuf);
916         u32 blocklen;
917
918         ide_debug_log(IDE_DBG_FUNC, "enter");
919
920         memset(cmd, 0, BLK_MAX_CDB);
921         cmd[0] = GPCMD_READ_CDVD_CAPACITY;
922
923         stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
924                                REQ_QUIET);
925         if (stat)
926                 return stat;
927
928         /*
929          * Sanity check the given block size
930          */
931         blocklen = be32_to_cpu(capbuf.blocklen);
932         switch (blocklen) {
933         case 512:
934         case 1024:
935         case 2048:
936         case 4096:
937                 break;
938         default:
939                 printk(KERN_ERR PFX "%s: weird block size %u\n",
940                                 drive->name, blocklen);
941                 printk(KERN_ERR PFX "%s: default to 2kb block size\n",
942                                 drive->name);
943                 blocklen = 2048;
944                 break;
945         }
946
947         *capacity = 1 + be32_to_cpu(capbuf.lba);
948         *sectors_per_frame = blocklen >> SECTOR_BITS;
949
950         ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
951                                      *capacity, *sectors_per_frame);
952
953         return 0;
954 }
955
956 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
957                                 int format, char *buf, int buflen,
958                                 struct request_sense *sense)
959 {
960         unsigned char cmd[BLK_MAX_CDB];
961
962         ide_debug_log(IDE_DBG_FUNC, "enter");
963
964         memset(cmd, 0, BLK_MAX_CDB);
965
966         cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
967         cmd[6] = trackno;
968         cmd[7] = (buflen >> 8);
969         cmd[8] = (buflen & 0xff);
970         cmd[9] = (format << 6);
971
972         if (msf_flag)
973                 cmd[1] = 2;
974
975         return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
976 }
977
978 /* Try to read the entire TOC for the disk into our internal buffer. */
979 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
980 {
981         int stat, ntracks, i;
982         struct cdrom_info *info = drive->driver_data;
983         struct cdrom_device_info *cdi = &info->devinfo;
984         struct atapi_toc *toc = info->toc;
985         struct {
986                 struct atapi_toc_header hdr;
987                 struct atapi_toc_entry  ent;
988         } ms_tmp;
989         long last_written;
990         unsigned long sectors_per_frame = SECTORS_PER_FRAME;
991
992         ide_debug_log(IDE_DBG_FUNC, "enter");
993
994         if (toc == NULL) {
995                 /* try to allocate space */
996                 toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
997                 if (toc == NULL) {
998                         printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
999                                         drive->name);
1000                         return -ENOMEM;
1001                 }
1002                 info->toc = toc;
1003         }
1004
1005         /*
1006          * Check to see if the existing data is still valid. If it is,
1007          * just return.
1008          */
1009         (void) cdrom_check_status(drive, sense);
1010
1011         if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
1012                 return 0;
1013
1014         /* try to get the total cdrom capacity and sector size */
1015         stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
1016                                    sense);
1017         if (stat)
1018                 toc->capacity = 0x1fffff;
1019
1020         set_capacity(info->disk, toc->capacity * sectors_per_frame);
1021         /* save a private copy of the TOC capacity for error handling */
1022         drive->probed_capacity = toc->capacity * sectors_per_frame;
1023
1024         blk_queue_logical_block_size(drive->queue,
1025                                      sectors_per_frame << SECTOR_BITS);
1026
1027         /* first read just the header, so we know how long the TOC is */
1028         stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1029                                     sizeof(struct atapi_toc_header), sense);
1030         if (stat)
1031                 return stat;
1032
1033         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1034                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1035                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1036         }
1037
1038         ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1039         if (ntracks <= 0)
1040                 return -EIO;
1041         if (ntracks > MAX_TRACKS)
1042                 ntracks = MAX_TRACKS;
1043
1044         /* now read the whole schmeer */
1045         stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1046                                   (char *)&toc->hdr,
1047                                    sizeof(struct atapi_toc_header) +
1048                                    (ntracks + 1) *
1049                                    sizeof(struct atapi_toc_entry), sense);
1050
1051         if (stat && toc->hdr.first_track > 1) {
1052                 /*
1053                  * Cds with CDI tracks only don't have any TOC entries, despite
1054                  * of this the returned values are
1055                  * first_track == last_track = number of CDI tracks + 1,
1056                  * so that this case is indistinguishable from the same layout
1057                  * plus an additional audio track. If we get an error for the
1058                  * regular case, we assume a CDI without additional audio
1059                  * tracks. In this case the readable TOC is empty (CDI tracks
1060                  * are not included) and only holds the Leadout entry.
1061                  *
1062                  * Heiko EiƟfeldt.
1063                  */
1064                 ntracks = 0;
1065                 stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1066                                            (char *)&toc->hdr,
1067                                            sizeof(struct atapi_toc_header) +
1068                                            (ntracks + 1) *
1069                                            sizeof(struct atapi_toc_entry),
1070                                            sense);
1071                 if (stat)
1072                         return stat;
1073
1074                 if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1075                         toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1076                         toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1077                 } else {
1078                         toc->hdr.first_track = CDROM_LEADOUT;
1079                         toc->hdr.last_track = CDROM_LEADOUT;
1080                 }
1081         }
1082
1083         if (stat)
1084                 return stat;
1085
1086         toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1087
1088         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1089                 toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1090                 toc->hdr.last_track  = bcd2bin(toc->hdr.last_track);
1091         }
1092
1093         for (i = 0; i <= ntracks; i++) {
1094                 if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1095                         if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1096                                 toc->ent[i].track = bcd2bin(toc->ent[i].track);
1097                         msf_from_bcd(&toc->ent[i].addr.msf);
1098                 }
1099                 toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1100                                                   toc->ent[i].addr.msf.second,
1101                                                   toc->ent[i].addr.msf.frame);
1102         }
1103
1104         if (toc->hdr.first_track != CDROM_LEADOUT) {
1105                 /* read the multisession information */
1106                 stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1107                                            sizeof(ms_tmp), sense);
1108                 if (stat)
1109                         return stat;
1110
1111                 toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1112         } else {
1113                 ms_tmp.hdr.last_track = CDROM_LEADOUT;
1114                 ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1115                 toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1116         }
1117
1118         if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1119                 /* re-read multisession information using MSF format */
1120                 stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1121                                            sizeof(ms_tmp), sense);
1122                 if (stat)
1123                         return stat;
1124
1125                 msf_from_bcd(&ms_tmp.ent.addr.msf);
1126                 toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1127                                                    ms_tmp.ent.addr.msf.second,
1128                                                    ms_tmp.ent.addr.msf.frame);
1129         }
1130
1131         toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1132
1133         /* now try to get the total cdrom capacity */
1134         stat = cdrom_get_last_written(cdi, &last_written);
1135         if (!stat && (last_written > toc->capacity)) {
1136                 toc->capacity = last_written;
1137                 set_capacity(info->disk, toc->capacity * sectors_per_frame);
1138                 drive->probed_capacity = toc->capacity * sectors_per_frame;
1139         }
1140
1141         /* Remember that we've read this stuff. */
1142         drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1143
1144         return 0;
1145 }
1146
1147 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1148 {
1149         struct cdrom_info *info = drive->driver_data;
1150         struct cdrom_device_info *cdi = &info->devinfo;
1151         struct packet_command cgc;
1152         int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1153
1154         ide_debug_log(IDE_DBG_FUNC, "enter");
1155
1156         if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1157                 size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1158
1159         init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1160         do {
1161                 /* we seem to get stat=0x01,err=0x00 the first time (??) */
1162                 stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1163                 if (!stat)
1164                         break;
1165         } while (--attempts);
1166         return stat;
1167 }
1168
1169 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1170 {
1171         struct cdrom_info *cd = drive->driver_data;
1172         u16 curspeed, maxspeed;
1173
1174         ide_debug_log(IDE_DBG_FUNC, "enter");
1175
1176         if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1177                 curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1178                 maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1179         } else {
1180                 curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1181                 maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1182         }
1183
1184         ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1185                                      curspeed, maxspeed);
1186
1187         cd->current_speed = (curspeed + (176/2)) / 176;
1188         cd->max_speed = (maxspeed + (176/2)) / 176;
1189 }
1190
1191 #define IDE_CD_CAPABILITIES \
1192         (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1193          CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1194          CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1195          CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1196          CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1197
1198 static struct cdrom_device_ops ide_cdrom_dops = {
1199         .open                   = ide_cdrom_open_real,
1200         .release                = ide_cdrom_release_real,
1201         .drive_status           = ide_cdrom_drive_status,
1202         .media_changed          = ide_cdrom_check_media_change_real,
1203         .tray_move              = ide_cdrom_tray_move,
1204         .lock_door              = ide_cdrom_lock_door,
1205         .select_speed           = ide_cdrom_select_speed,
1206         .get_last_session       = ide_cdrom_get_last_session,
1207         .get_mcn                = ide_cdrom_get_mcn,
1208         .reset                  = ide_cdrom_reset,
1209         .audio_ioctl            = ide_cdrom_audio_ioctl,
1210         .capability             = IDE_CD_CAPABILITIES,
1211         .generic_packet         = ide_cdrom_packet,
1212 };
1213
1214 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1215 {
1216         struct cdrom_info *info = drive->driver_data;
1217         struct cdrom_device_info *devinfo = &info->devinfo;
1218
1219         ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1220
1221         devinfo->ops = &ide_cdrom_dops;
1222         devinfo->speed = info->current_speed;
1223         devinfo->capacity = nslots;
1224         devinfo->handle = drive;
1225         strcpy(devinfo->name, drive->name);
1226
1227         if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1228                 devinfo->mask |= CDC_SELECT_SPEED;
1229
1230         devinfo->disk = info->disk;
1231         return register_cdrom(devinfo);
1232 }
1233
1234 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1235 {
1236         struct cdrom_info *cd = drive->driver_data;
1237         struct cdrom_device_info *cdi = &cd->devinfo;
1238         u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1239         mechtype_t mechtype;
1240         int nslots = 1;
1241
1242         ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1243                                      drive->media, drive->atapi_flags);
1244
1245         cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1246                      CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1247                      CDC_MO_DRIVE | CDC_RAM);
1248
1249         if (drive->media == ide_optical) {
1250                 cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1251                 printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1252                                 drive->name);
1253                 return nslots;
1254         }
1255
1256         if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1257                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1258                 cdi->mask &= ~CDC_PLAY_AUDIO;
1259                 return nslots;
1260         }
1261
1262         /*
1263          * We have to cheat a little here. the packet will eventually be queued
1264          * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1265          * Since this device hasn't been registered with the Uniform layer yet,
1266          * it can't do this. Same goes for cdi->ops.
1267          */
1268         cdi->handle = drive;
1269         cdi->ops = &ide_cdrom_dops;
1270
1271         if (ide_cdrom_get_capabilities(drive, buf))
1272                 return 0;
1273
1274         if ((buf[8 + 6] & 0x01) == 0)
1275                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1276         if (buf[8 + 6] & 0x08)
1277                 drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1278         if (buf[8 + 3] & 0x01)
1279                 cdi->mask &= ~CDC_CD_R;
1280         if (buf[8 + 3] & 0x02)
1281                 cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1282         if (buf[8 + 2] & 0x38)
1283                 cdi->mask &= ~CDC_DVD;
1284         if (buf[8 + 3] & 0x20)
1285                 cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1286         if (buf[8 + 3] & 0x10)
1287                 cdi->mask &= ~CDC_DVD_R;
1288         if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1289                 cdi->mask &= ~CDC_PLAY_AUDIO;
1290
1291         mechtype = buf[8 + 6] >> 5;
1292         if (mechtype == mechtype_caddy ||
1293             mechtype == mechtype_popup ||
1294             (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1295                 cdi->mask |= CDC_CLOSE_TRAY;
1296
1297         if (cdi->sanyo_slot > 0) {
1298                 cdi->mask &= ~CDC_SELECT_DISC;
1299                 nslots = 3;
1300         } else if (mechtype == mechtype_individual_changer ||
1301                    mechtype == mechtype_cartridge_changer) {
1302                 nslots = cdrom_number_of_slots(cdi);
1303                 if (nslots > 1)
1304                         cdi->mask &= ~CDC_SELECT_DISC;
1305         }
1306
1307         ide_cdrom_update_speed(drive, buf);
1308
1309         printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1310
1311         /* don't print speed if the drive reported 0 */
1312         if (cd->max_speed)
1313                 printk(KERN_CONT " %dX", cd->max_speed);
1314
1315         printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1316
1317         if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1318                 printk(KERN_CONT " DVD%s%s",
1319                                  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1320                                  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1321
1322         if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1323                 printk(KERN_CONT " CD%s%s",
1324                                  (cdi->mask & CDC_CD_R) ? "" : "-R",
1325                                  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1326
1327         if ((cdi->mask & CDC_SELECT_DISC) == 0)
1328                 printk(KERN_CONT " changer w/%d slots", nslots);
1329         else
1330                 printk(KERN_CONT " drive");
1331
1332         printk(KERN_CONT ", %dkB Cache\n",
1333                          be16_to_cpup((__be16 *)&buf[8 + 12]));
1334
1335         return nslots;
1336 }
1337
1338 /* standard prep_rq_fn that builds 10 byte cmds */
1339 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1340 {
1341         int hard_sect = queue_logical_block_size(q);
1342         long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1343         unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1344
1345         memset(rq->cmd, 0, BLK_MAX_CDB);
1346
1347         if (rq_data_dir(rq) == READ)
1348                 rq->cmd[0] = GPCMD_READ_10;
1349         else
1350                 rq->cmd[0] = GPCMD_WRITE_10;
1351
1352         /*
1353          * fill in lba
1354          */
1355         rq->cmd[2] = (block >> 24) & 0xff;
1356         rq->cmd[3] = (block >> 16) & 0xff;
1357         rq->cmd[4] = (block >>  8) & 0xff;
1358         rq->cmd[5] = block & 0xff;
1359
1360         /*
1361          * and transfer length
1362          */
1363         rq->cmd[7] = (blocks >> 8) & 0xff;
1364         rq->cmd[8] = blocks & 0xff;
1365         rq->cmd_len = 10;
1366         return BLKPREP_OK;
1367 }
1368
1369 /*
1370  * Most of the SCSI commands are supported directly by ATAPI devices.
1371  * This transform handles the few exceptions.
1372  */
1373 static int ide_cdrom_prep_pc(struct request *rq)
1374 {
1375         u8 *c = rq->cmd;
1376
1377         /* transform 6-byte read/write commands to the 10-byte version */
1378         if (c[0] == READ_6 || c[0] == WRITE_6) {
1379                 c[8] = c[4];
1380                 c[5] = c[3];
1381                 c[4] = c[2];
1382                 c[3] = c[1] & 0x1f;
1383                 c[2] = 0;
1384                 c[1] &= 0xe0;
1385                 c[0] += (READ_10 - READ_6);
1386                 rq->cmd_len = 10;
1387                 return BLKPREP_OK;
1388         }
1389
1390         /*
1391          * it's silly to pretend we understand 6-byte sense commands, just
1392          * reject with ILLEGAL_REQUEST and the caller should take the
1393          * appropriate action
1394          */
1395         if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1396                 rq->errors = ILLEGAL_REQUEST;
1397                 return BLKPREP_KILL;
1398         }
1399
1400         return BLKPREP_OK;
1401 }
1402
1403 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1404 {
1405         if (blk_fs_request(rq))
1406                 return ide_cdrom_prep_fs(q, rq);
1407         else if (blk_pc_request(rq))
1408                 return ide_cdrom_prep_pc(rq);
1409
1410         return 0;
1411 }
1412
1413 struct cd_list_entry {
1414         const char      *id_model;
1415         const char      *id_firmware;
1416         unsigned int    cd_flags;
1417 };
1418
1419 #ifdef CONFIG_IDE_PROC_FS
1420 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1421 {
1422         unsigned long capacity, sectors_per_frame;
1423
1424         if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1425                 return 0;
1426
1427         return capacity * sectors_per_frame;
1428 }
1429
1430 static int proc_idecd_read_capacity(char *page, char **start, off_t off,
1431                                         int count, int *eof, void *data)
1432 {
1433         ide_drive_t *drive = data;
1434         int len;
1435
1436         len = sprintf(page, "%llu\n", (long long)ide_cdrom_capacity(drive));
1437         PROC_IDE_READ_RETURN(page, start, off, count, eof, len);
1438 }
1439
1440 static ide_proc_entry_t idecd_proc[] = {
1441         { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
1442         { NULL, 0, NULL, NULL }
1443 };
1444
1445 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1446 {
1447         return idecd_proc;
1448 }
1449
1450 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1451 {
1452         return NULL;
1453 }
1454 #endif
1455
1456 static const struct cd_list_entry ide_cd_quirks_list[] = {
1457         /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1458         { "SAMSUNG CD-ROM SCR-3231", NULL,   IDE_AFLAG_NO_SPEED_SELECT       },
1459         /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1460         { "NEC CD-ROM DRIVE:260",    "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1461                                              IDE_AFLAG_PRE_ATAPI12,          },
1462         /* Vertos 300, some versions of this drive like to talk BCD. */
1463         { "V003S0DS",                NULL,   IDE_AFLAG_VERTOS_300_SSD,       },
1464         /* Vertos 600 ESD. */
1465         { "V006E0DS",                NULL,   IDE_AFLAG_VERTOS_600_ESD,       },
1466         /*
1467          * Sanyo 3 CD changer uses a non-standard command for CD changing
1468          * (by default standard ATAPI support for CD changers is used).
1469          */
1470         { "CD-ROM CDR-C3 G",         NULL,   IDE_AFLAG_SANYO_3CD             },
1471         { "CD-ROM CDR-C3G",          NULL,   IDE_AFLAG_SANYO_3CD             },
1472         { "CD-ROM CDR_C36",          NULL,   IDE_AFLAG_SANYO_3CD             },
1473         /* Stingray 8X CD-ROM. */
1474         { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1475         /*
1476          * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1477          * mode sense page capabilities size, but older drives break.
1478          */
1479         { "ATAPI CD ROM DRIVE 50X MAX", NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1480         { "WPI CDS-32X",                NULL,   IDE_AFLAG_FULL_CAPS_PAGE     },
1481         /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1482         { "",                        "241N", IDE_AFLAG_LE_SPEED_FIELDS       },
1483         /*
1484          * Some drives used by Apple don't advertise audio play
1485          * but they do support reading TOC & audio datas.
1486          */
1487         { "MATSHITADVD-ROM SR-8187", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1488         { "MATSHITADVD-ROM SR-8186", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1489         { "MATSHITADVD-ROM SR-8176", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1490         { "MATSHITADVD-ROM SR-8174", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1491         { "Optiarc DVD RW AD-5200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1492         { "Optiarc DVD RW AD-7200A", NULL,   IDE_AFLAG_PLAY_AUDIO_OK         },
1493         { "Optiarc DVD RW AD-7543A", NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1494         { "TEAC CD-ROM CD-224E",     NULL,   IDE_AFLAG_NO_AUTOCLOSE          },
1495         { NULL, NULL, 0 }
1496 };
1497
1498 static unsigned int ide_cd_flags(u16 *id)
1499 {
1500         const struct cd_list_entry *cle = ide_cd_quirks_list;
1501
1502         while (cle->id_model) {
1503                 if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1504                     (cle->id_firmware == NULL ||
1505                      strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1506                         return cle->cd_flags;
1507                 cle++;
1508         }
1509
1510         return 0;
1511 }
1512
1513 static int ide_cdrom_setup(ide_drive_t *drive)
1514 {
1515         struct cdrom_info *cd = drive->driver_data;
1516         struct cdrom_device_info *cdi = &cd->devinfo;
1517         struct request_queue *q = drive->queue;
1518         u16 *id = drive->id;
1519         char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1520         int nslots;
1521
1522         ide_debug_log(IDE_DBG_PROBE, "enter");
1523
1524         blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1525         blk_queue_dma_alignment(q, 31);
1526         blk_queue_update_dma_pad(q, 15);
1527
1528         q->unplug_delay = max((1 * HZ) / 1000, 1);
1529
1530         drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1531         drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1532
1533         if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1534             fw_rev[4] == '1' && fw_rev[6] <= '2')
1535                 drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1536                                      IDE_AFLAG_TOCADDR_AS_BCD);
1537         else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1538                  fw_rev[4] == '1' && fw_rev[6] <= '2')
1539                 drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1540         else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1541                 /* 3 => use CD in slot 0 */
1542                 cdi->sanyo_slot = 3;
1543
1544         nslots = ide_cdrom_probe_capabilities(drive);
1545
1546         blk_queue_logical_block_size(q, CD_FRAMESIZE);
1547
1548         if (ide_cdrom_register(drive, nslots)) {
1549                 printk(KERN_ERR PFX "%s: %s failed to register device with the"
1550                                 " cdrom driver.\n", drive->name, __func__);
1551                 cd->devinfo.handle = NULL;
1552                 return 1;
1553         }
1554
1555         ide_proc_register_driver(drive, cd->driver);
1556         return 0;
1557 }
1558
1559 static void ide_cd_remove(ide_drive_t *drive)
1560 {
1561         struct cdrom_info *info = drive->driver_data;
1562
1563         ide_debug_log(IDE_DBG_FUNC, "enter");
1564
1565         ide_proc_unregister_driver(drive, info->driver);
1566         device_del(&info->dev);
1567         del_gendisk(info->disk);
1568
1569         mutex_lock(&idecd_ref_mutex);
1570         put_device(&info->dev);
1571         mutex_unlock(&idecd_ref_mutex);
1572 }
1573
1574 static void ide_cd_release(struct device *dev)
1575 {
1576         struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1577         struct cdrom_device_info *devinfo = &info->devinfo;
1578         ide_drive_t *drive = info->drive;
1579         struct gendisk *g = info->disk;
1580
1581         ide_debug_log(IDE_DBG_FUNC, "enter");
1582
1583         kfree(info->toc);
1584         if (devinfo->handle == drive)
1585                 unregister_cdrom(devinfo);
1586         drive->driver_data = NULL;
1587         blk_queue_prep_rq(drive->queue, NULL);
1588         g->private_data = NULL;
1589         put_disk(g);
1590         kfree(info);
1591 }
1592
1593 static int ide_cd_probe(ide_drive_t *);
1594
1595 static struct ide_driver ide_cdrom_driver = {
1596         .gen_driver = {
1597                 .owner          = THIS_MODULE,
1598                 .name           = "ide-cdrom",
1599                 .bus            = &ide_bus_type,
1600         },
1601         .probe                  = ide_cd_probe,
1602         .remove                 = ide_cd_remove,
1603         .version                = IDECD_VERSION,
1604         .do_request             = ide_cd_do_request,
1605 #ifdef CONFIG_IDE_PROC_FS
1606         .proc_entries           = ide_cd_proc_entries,
1607         .proc_devsets           = ide_cd_proc_devsets,
1608 #endif
1609 };
1610
1611 static int idecd_open(struct block_device *bdev, fmode_t mode)
1612 {
1613         struct cdrom_info *info = ide_cd_get(bdev->bd_disk);
1614         int rc = -ENOMEM;
1615
1616         if (!info)
1617                 return -ENXIO;
1618
1619         rc = cdrom_open(&info->devinfo, bdev, mode);
1620
1621         if (rc < 0)
1622                 ide_cd_put(info);
1623
1624         return rc;
1625 }
1626
1627 static int idecd_release(struct gendisk *disk, fmode_t mode)
1628 {
1629         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1630
1631         cdrom_release(&info->devinfo, mode);
1632
1633         ide_cd_put(info);
1634
1635         return 0;
1636 }
1637
1638 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1639 {
1640         struct packet_command cgc;
1641         char buffer[16];
1642         int stat;
1643         char spindown;
1644
1645         if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1646                 return -EFAULT;
1647
1648         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1649
1650         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1651         if (stat)
1652                 return stat;
1653
1654         buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1655         return cdrom_mode_select(cdi, &cgc);
1656 }
1657
1658 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1659 {
1660         struct packet_command cgc;
1661         char buffer[16];
1662         int stat;
1663         char spindown;
1664
1665         init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1666
1667         stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1668         if (stat)
1669                 return stat;
1670
1671         spindown = buffer[11] & 0x0f;
1672         if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1673                 return -EFAULT;
1674         return 0;
1675 }
1676
1677 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1678                         unsigned int cmd, unsigned long arg)
1679 {
1680         struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1681         int err;
1682
1683         switch (cmd) {
1684         case CDROMSETSPINDOWN:
1685                 return idecd_set_spindown(&info->devinfo, arg);
1686         case CDROMGETSPINDOWN:
1687                 return idecd_get_spindown(&info->devinfo, arg);
1688         default:
1689                 break;
1690         }
1691
1692         err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1693         if (err == -EINVAL)
1694                 err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1695
1696         return err;
1697 }
1698
1699 static int idecd_media_changed(struct gendisk *disk)
1700 {
1701         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1702         return cdrom_media_changed(&info->devinfo);
1703 }
1704
1705 static int idecd_revalidate_disk(struct gendisk *disk)
1706 {
1707         struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1708         struct request_sense sense;
1709
1710         ide_cd_read_toc(info->drive, &sense);
1711
1712         return  0;
1713 }
1714
1715 static struct block_device_operations idecd_ops = {
1716         .owner                  = THIS_MODULE,
1717         .open                   = idecd_open,
1718         .release                = idecd_release,
1719         .locked_ioctl           = idecd_ioctl,
1720         .media_changed          = idecd_media_changed,
1721         .revalidate_disk        = idecd_revalidate_disk
1722 };
1723
1724 /* module options */
1725 static unsigned long debug_mask;
1726 module_param(debug_mask, ulong, 0644);
1727
1728 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1729
1730 static int ide_cd_probe(ide_drive_t *drive)
1731 {
1732         struct cdrom_info *info;
1733         struct gendisk *g;
1734         struct request_sense sense;
1735
1736         ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1737                                      drive->driver_req, drive->media);
1738
1739         if (!strstr("ide-cdrom", drive->driver_req))
1740                 goto failed;
1741
1742         if (drive->media != ide_cdrom && drive->media != ide_optical)
1743                 goto failed;
1744
1745         drive->debug_mask = debug_mask;
1746         drive->irq_handler = cdrom_newpc_intr;
1747
1748         info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1749         if (info == NULL) {
1750                 printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1751                                 drive->name);
1752                 goto failed;
1753         }
1754
1755         g = alloc_disk(1 << PARTN_BITS);
1756         if (!g)
1757                 goto out_free_cd;
1758
1759         ide_init_disk(g, drive);
1760
1761         info->dev.parent = &drive->gendev;
1762         info->dev.release = ide_cd_release;
1763         dev_set_name(&info->dev, dev_name(&drive->gendev));
1764
1765         if (device_register(&info->dev))
1766                 goto out_free_disk;
1767
1768         info->drive = drive;
1769         info->driver = &ide_cdrom_driver;
1770         info->disk = g;
1771
1772         g->private_data = &info->driver;
1773
1774         drive->driver_data = info;
1775
1776         g->minors = 1;
1777         g->driverfs_dev = &drive->gendev;
1778         g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1779         if (ide_cdrom_setup(drive)) {
1780                 put_device(&info->dev);
1781                 goto failed;
1782         }
1783
1784         ide_cd_read_toc(drive, &sense);
1785         g->fops = &idecd_ops;
1786         g->flags |= GENHD_FL_REMOVABLE;
1787         add_disk(g);
1788         return 0;
1789
1790 out_free_disk:
1791         put_disk(g);
1792 out_free_cd:
1793         kfree(info);
1794 failed:
1795         return -ENODEV;
1796 }
1797
1798 static void __exit ide_cdrom_exit(void)
1799 {
1800         driver_unregister(&ide_cdrom_driver.gen_driver);
1801 }
1802
1803 static int __init ide_cdrom_init(void)
1804 {
1805         printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1806         return driver_register(&ide_cdrom_driver.gen_driver);
1807 }
1808
1809 MODULE_ALIAS("ide:*m-cdrom*");
1810 MODULE_ALIAS("ide-cd");
1811 module_init(ide_cdrom_init);
1812 module_exit(ide_cdrom_exit);
1813 MODULE_LICENSE("GPL");