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ide-cd.c
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1 /*
2  * ATAPI CD-ROM driver.
3  *
4  * Copyright (C) 1994-1996 Scott Snyder <[email protected]>
5  * Copyright (C) 1996-1998 Erik Andersen <[email protected]>
6  * Copyright (C) 1998-2000 Jens Axboe <[email protected]>
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/slab.h>
35 #include <linux/interrupt.h>
36 #include <linux/errno.h>
37 #include <linux/cdrom.h>
38 #include <linux/ide.h>
39 #include <linux/completion.h>
40 #include <linux/mutex.h>
41 #include <linux/bcd.h>
42 
43 /* For SCSI -> ATAPI command conversion */
44 #include <scsi/scsi.h>
45 
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(ide_cd_mutex);
54 static DEFINE_MUTEX(idecd_ref_mutex);
55 
56 static void ide_cd_release(struct device *);
57 
58 static struct cdrom_info *ide_cd_get(struct gendisk *disk)
59 {
60  struct cdrom_info *cd = NULL;
61 
62  mutex_lock(&idecd_ref_mutex);
63  cd = ide_drv_g(disk, cdrom_info);
64  if (cd) {
65  if (ide_device_get(cd->drive))
66  cd = NULL;
67  else
68  get_device(&cd->dev);
69 
70  }
71  mutex_unlock(&idecd_ref_mutex);
72  return cd;
73 }
74 
75 static void ide_cd_put(struct cdrom_info *cd)
76 {
77  ide_drive_t *drive = cd->drive;
78 
79  mutex_lock(&idecd_ref_mutex);
80  put_device(&cd->dev);
81  ide_device_put(drive);
82  mutex_unlock(&idecd_ref_mutex);
83 }
84 
85 /*
86  * Generic packet command support and error handling routines.
87  */
88 
89 /* Mark that we've seen a media change and invalidate our internal buffers. */
90 static void cdrom_saw_media_change(ide_drive_t *drive)
91 {
92  drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
93  drive->atapi_flags &= ~IDE_AFLAG_TOC_VALID;
94 }
95 
96 static int cdrom_log_sense(ide_drive_t *drive, struct request *rq)
97 {
98  struct request_sense *sense = &drive->sense_data;
99  int log = 0;
100 
101  if (!sense || !rq || (rq->cmd_flags & REQ_QUIET))
102  return 0;
103 
104  ide_debug_log(IDE_DBG_SENSE, "sense_key: 0x%x", sense->sense_key);
105 
106  switch (sense->sense_key) {
107  case NO_SENSE:
108  case RECOVERED_ERROR:
109  break;
110  case NOT_READY:
111  /*
112  * don't care about tray state messages for e.g. capacity
113  * commands or in-progress or becoming ready
114  */
115  if (sense->asc == 0x3a || sense->asc == 0x04)
116  break;
117  log = 1;
118  break;
119  case ILLEGAL_REQUEST:
120  /*
121  * don't log START_STOP unit with LoEj set, since we cannot
122  * reliably check if drive can auto-close
123  */
124  if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
125  break;
126  log = 1;
127  break;
128  case UNIT_ATTENTION:
129  /*
130  * Make good and sure we've seen this potential media change.
131  * Some drives (i.e. Creative) fail to present the correct sense
132  * key in the error register.
133  */
134  cdrom_saw_media_change(drive);
135  break;
136  default:
137  log = 1;
138  break;
139  }
140  return log;
141 }
142 
143 static void cdrom_analyze_sense_data(ide_drive_t *drive,
144  struct request *failed_command)
145 {
146  struct request_sense *sense = &drive->sense_data;
147  struct cdrom_info *info = drive->driver_data;
148  unsigned long sector;
149  unsigned long bio_sectors;
150 
151  ide_debug_log(IDE_DBG_SENSE, "error_code: 0x%x, sense_key: 0x%x",
152  sense->error_code, sense->sense_key);
153 
154  if (failed_command)
155  ide_debug_log(IDE_DBG_SENSE, "failed cmd: 0x%x",
156  failed_command->cmd[0]);
157 
158  if (!cdrom_log_sense(drive, failed_command))
159  return;
160 
161  /*
162  * If a read toc is executed for a CD-R or CD-RW medium where the first
163  * toc has not been recorded yet, it will fail with 05/24/00 (which is a
164  * confusing error)
165  */
166  if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
167  if (sense->sense_key == 0x05 && sense->asc == 0x24)
168  return;
169 
170  /* current error */
171  if (sense->error_code == 0x70) {
172  switch (sense->sense_key) {
173  case MEDIUM_ERROR:
174  case VOLUME_OVERFLOW:
175  case ILLEGAL_REQUEST:
176  if (!sense->valid)
177  break;
178  if (failed_command == NULL ||
179  failed_command->cmd_type != REQ_TYPE_FS)
180  break;
181  sector = (sense->information[0] << 24) |
182  (sense->information[1] << 16) |
183  (sense->information[2] << 8) |
184  (sense->information[3]);
185 
186  if (queue_logical_block_size(drive->queue) == 2048)
187  /* device sector size is 2K */
188  sector <<= 2;
189 
190  bio_sectors = max(bio_sectors(failed_command->bio), 4U);
191  sector &= ~(bio_sectors - 1);
192 
193  /*
194  * The SCSI specification allows for the value
195  * returned by READ CAPACITY to be up to 75 2K
196  * sectors past the last readable block.
197  * Therefore, if we hit a medium error within the
198  * last 75 2K sectors, we decrease the saved size
199  * value.
200  */
201  if (sector < get_capacity(info->disk) &&
202  drive->probed_capacity - sector < 4 * 75)
203  set_capacity(info->disk, sector);
204  }
205  }
206 
207  ide_cd_log_error(drive->name, failed_command, sense);
208 }
209 
210 static void ide_cd_complete_failed_rq(ide_drive_t *drive, struct request *rq)
211 {
212  /*
213  * For REQ_TYPE_SENSE, "rq->special" points to the original
214  * failed request. Also, the sense data should be read
215  * directly from rq which might be different from the original
216  * sense buffer if it got copied during mapping.
217  */
218  struct request *failed = (struct request *)rq->special;
219  void *sense = bio_data(rq->bio);
220 
221  if (failed) {
222  if (failed->sense) {
223  /*
224  * Sense is always read into drive->sense_data.
225  * Copy back if the failed request has its
226  * sense pointer set.
227  */
228  memcpy(failed->sense, sense, 18);
229  failed->sense_len = rq->sense_len;
230  }
231  cdrom_analyze_sense_data(drive, failed);
232 
233  if (ide_end_rq(drive, failed, -EIO, blk_rq_bytes(failed)))
234  BUG();
235  } else
236  cdrom_analyze_sense_data(drive, NULL);
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  /*
261  * take a breather
262  */
263  blk_delay_queue(drive->queue, 1);
264  return 1;
265  }
266 }
267 
274 static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
275 {
276  ide_hwif_t *hwif = drive->hwif;
277  struct request *rq = hwif->rq;
278  int err, sense_key, do_end_request = 0;
279 
280  /* get the IDE error register */
281  err = ide_read_error(drive);
282  sense_key = err >> 4;
283 
284  ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, rq->cmd_type: 0x%x, err: 0x%x, "
285  "stat 0x%x",
286  rq->cmd[0], rq->cmd_type, err, stat);
287 
288  if (rq->cmd_type == REQ_TYPE_SENSE) {
289  /*
290  * We got an error trying to get sense info from the drive
291  * (probably while trying to recover from a former error).
292  * Just give up.
293  */
294  rq->cmd_flags |= REQ_FAILED;
295  return 2;
296  }
297 
298  /* if we have an error, pass CHECK_CONDITION as the SCSI status byte */
299  if (rq->cmd_type == REQ_TYPE_BLOCK_PC && !rq->errors)
300  rq->errors = SAM_STAT_CHECK_CONDITION;
301 
302  if (blk_noretry_request(rq))
303  do_end_request = 1;
304 
305  switch (sense_key) {
306  case NOT_READY:
307  if (rq->cmd_type == REQ_TYPE_FS && rq_data_dir(rq) == WRITE) {
308  if (ide_cd_breathe(drive, rq))
309  return 1;
310  } else {
311  cdrom_saw_media_change(drive);
312 
313  if (rq->cmd_type == REQ_TYPE_FS &&
314  !(rq->cmd_flags & REQ_QUIET))
315  printk(KERN_ERR PFX "%s: tray open\n",
316  drive->name);
317  }
318  do_end_request = 1;
319  break;
320  case UNIT_ATTENTION:
321  cdrom_saw_media_change(drive);
322 
323  if (rq->cmd_type != REQ_TYPE_FS)
324  return 0;
325 
326  /*
327  * Arrange to retry the request but be sure to give up if we've
328  * retried too many times.
329  */
330  if (++rq->errors > ERROR_MAX)
331  do_end_request = 1;
332  break;
333  case ILLEGAL_REQUEST:
334  /*
335  * Don't print error message for this condition -- SFF8090i
336  * indicates that 5/24/00 is the correct response to a request
337  * to close the tray if the drive doesn't have that capability.
338  *
339  * cdrom_log_sense() knows this!
340  */
341  if (rq->cmd[0] == GPCMD_START_STOP_UNIT)
342  break;
343  /* fall-through */
344  case DATA_PROTECT:
345  /*
346  * No point in retrying after an illegal request or data
347  * protect error.
348  */
349  if (!(rq->cmd_flags & REQ_QUIET))
350  ide_dump_status(drive, "command error", stat);
351  do_end_request = 1;
352  break;
353  case MEDIUM_ERROR:
354  /*
355  * No point in re-trying a zillion times on a bad sector.
356  * If we got here the error is not correctable.
357  */
358  if (!(rq->cmd_flags & REQ_QUIET))
359  ide_dump_status(drive, "media error "
360  "(bad sector)", stat);
361  do_end_request = 1;
362  break;
363  case BLANK_CHECK:
364  /* disk appears blank? */
365  if (!(rq->cmd_flags & REQ_QUIET))
366  ide_dump_status(drive, "media error (blank)",
367  stat);
368  do_end_request = 1;
369  break;
370  default:
371  if (rq->cmd_type != REQ_TYPE_FS)
372  break;
373  if (err & ~ATA_ABORTED) {
374  /* go to the default handler for other errors */
375  ide_error(drive, "cdrom_decode_status", stat);
376  return 1;
377  } else if (++rq->errors > ERROR_MAX)
378  /* we've racked up too many retries, abort */
379  do_end_request = 1;
380  }
381 
382  if (rq->cmd_type != REQ_TYPE_FS) {
383  rq->cmd_flags |= REQ_FAILED;
384  do_end_request = 1;
385  }
386 
387  /*
388  * End a request through request sense analysis when we have sense data.
389  * We need this in order to perform end of media processing.
390  */
391  if (do_end_request)
392  goto end_request;
393 
394  /* if we got a CHECK_CONDITION status, queue a request sense command */
395  if (stat & ATA_ERR)
396  return ide_queue_sense_rq(drive, NULL) ? 2 : 1;
397  return 1;
398 
399 end_request:
400  if (stat & ATA_ERR) {
401  hwif->rq = NULL;
402  return ide_queue_sense_rq(drive, rq) ? 2 : 1;
403  } else
404  return 2;
405 }
406 
407 static void ide_cd_request_sense_fixup(ide_drive_t *drive, struct ide_cmd *cmd)
408 {
409  struct request *rq = cmd->rq;
410 
411  ide_debug_log(IDE_DBG_FUNC, "rq->cmd[0]: 0x%x", rq->cmd[0]);
412 
413  /*
414  * Some of the trailing request sense fields are optional,
415  * and some drives don't send them. Sigh.
416  */
417  if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
418  cmd->nleft > 0 && cmd->nleft <= 5)
419  cmd->nleft = 0;
420 }
421 
422 int ide_cd_queue_pc(ide_drive_t *drive, const unsigned char *cmd,
423  int write, void *buffer, unsigned *bufflen,
424  struct request_sense *sense, int timeout,
425  unsigned int cmd_flags)
426 {
427  struct cdrom_info *info = drive->driver_data;
428  struct request_sense local_sense;
429  int retries = 10;
430  unsigned int flags = 0;
431 
432  if (!sense)
433  sense = &local_sense;
434 
435  ide_debug_log(IDE_DBG_PC, "cmd[0]: 0x%x, write: 0x%x, timeout: %d, "
436  "cmd_flags: 0x%x",
437  cmd[0], write, timeout, cmd_flags);
438 
439  /* start of retry loop */
440  do {
441  struct request *rq;
442  int error;
443 
444  rq = blk_get_request(drive->queue, write, __GFP_WAIT);
445 
446  memcpy(rq->cmd, cmd, BLK_MAX_CDB);
447  rq->cmd_type = REQ_TYPE_ATA_PC;
448  rq->sense = sense;
449  rq->cmd_flags |= cmd_flags;
450  rq->timeout = timeout;
451  if (buffer) {
452  error = blk_rq_map_kern(drive->queue, rq, buffer,
453  *bufflen, GFP_NOIO);
454  if (error) {
455  blk_put_request(rq);
456  return error;
457  }
458  }
459 
460  error = blk_execute_rq(drive->queue, info->disk, rq, 0);
461 
462  if (buffer)
463  *bufflen = rq->resid_len;
464 
465  flags = rq->cmd_flags;
466  blk_put_request(rq);
467 
468  /*
469  * FIXME: we should probably abort/retry or something in case of
470  * failure.
471  */
472  if (flags & REQ_FAILED) {
473  /*
474  * The request failed. Retry if it was due to a unit
475  * attention status (usually means media was changed).
476  */
477  struct request_sense *reqbuf = sense;
478 
479  if (reqbuf->sense_key == UNIT_ATTENTION)
480  cdrom_saw_media_change(drive);
481  else if (reqbuf->sense_key == NOT_READY &&
482  reqbuf->asc == 4 && reqbuf->ascq != 4) {
483  /*
484  * The drive is in the process of loading
485  * a disk. Retry, but wait a little to give
486  * the drive time to complete the load.
487  */
488  ssleep(2);
489  } else {
490  /* otherwise, don't retry */
491  retries = 0;
492  }
493  --retries;
494  }
495 
496  /* end of retry loop */
497  } while ((flags & REQ_FAILED) && retries >= 0);
498 
499  /* return an error if the command failed */
500  return (flags & REQ_FAILED) ? -EIO : 0;
501 }
502 
503 /*
504  * returns true if rq has been completed
505  */
506 static bool ide_cd_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
507 {
508  unsigned int nr_bytes = cmd->nbytes - cmd->nleft;
509 
510  if (cmd->tf_flags & IDE_TFLAG_WRITE)
511  nr_bytes -= cmd->last_xfer_len;
512 
513  if (nr_bytes > 0) {
514  ide_complete_rq(drive, 0, nr_bytes);
515  return true;
516  }
517 
518  return false;
519 }
520 
521 static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
522 {
523  ide_hwif_t *hwif = drive->hwif;
524  struct ide_cmd *cmd = &hwif->cmd;
525  struct request *rq = hwif->rq;
526  ide_expiry_t *expiry = NULL;
527  int dma_error = 0, dma, thislen, uptodate = 0;
528  int write = (rq_data_dir(rq) == WRITE) ? 1 : 0, rc = 0;
529  int sense = (rq->cmd_type == REQ_TYPE_SENSE);
530  unsigned int timeout;
531  u16 len;
532  u8 ireason, stat;
533 
534  ide_debug_log(IDE_DBG_PC, "cmd: 0x%x, write: 0x%x", rq->cmd[0], write);
535 
536  /* check for errors */
537  dma = drive->dma;
538  if (dma) {
539  drive->dma = 0;
540  drive->waiting_for_dma = 0;
541  dma_error = hwif->dma_ops->dma_end(drive);
542  ide_dma_unmap_sg(drive, cmd);
543  if (dma_error) {
544  printk(KERN_ERR PFX "%s: DMA %s error\n", drive->name,
545  write ? "write" : "read");
546  ide_dma_off(drive);
547  }
548  }
549 
550  /* check status */
551  stat = hwif->tp_ops->read_status(hwif);
552 
553  if (!OK_STAT(stat, 0, BAD_R_STAT)) {
554  rc = cdrom_decode_status(drive, stat);
555  if (rc) {
556  if (rc == 2)
557  goto out_end;
558  return ide_stopped;
559  }
560  }
561 
562  /* using dma, transfer is complete now */
563  if (dma) {
564  if (dma_error)
565  return ide_error(drive, "dma error", stat);
566  uptodate = 1;
567  goto out_end;
568  }
569 
570  ide_read_bcount_and_ireason(drive, &len, &ireason);
571 
572  thislen = (rq->cmd_type == REQ_TYPE_FS) ? len : cmd->nleft;
573  if (thislen > len)
574  thislen = len;
575 
576  ide_debug_log(IDE_DBG_PC, "DRQ: stat: 0x%x, thislen: %d",
577  stat, thislen);
578 
579  /* If DRQ is clear, the command has completed. */
580  if ((stat & ATA_DRQ) == 0) {
581  if (rq->cmd_type == REQ_TYPE_FS) {
582  /*
583  * If we're not done reading/writing, complain.
584  * Otherwise, complete the command normally.
585  */
586  uptodate = 1;
587  if (cmd->nleft > 0) {
588  printk(KERN_ERR PFX "%s: %s: data underrun "
589  "(%u bytes)\n", drive->name, __func__,
590  cmd->nleft);
591  if (!write)
592  rq->cmd_flags |= REQ_FAILED;
593  uptodate = 0;
594  }
595  } else if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
596  ide_cd_request_sense_fixup(drive, cmd);
597 
598  uptodate = cmd->nleft ? 0 : 1;
599 
600  /*
601  * suck out the remaining bytes from the drive in an
602  * attempt to complete the data xfer. (see BZ#13399)
603  */
604  if (!(stat & ATA_ERR) && !uptodate && thislen) {
605  ide_pio_bytes(drive, cmd, write, thislen);
606  uptodate = cmd->nleft ? 0 : 1;
607  }
608 
609  if (!uptodate)
610  rq->cmd_flags |= REQ_FAILED;
611  }
612  goto out_end;
613  }
614 
615  rc = ide_check_ireason(drive, rq, len, ireason, write);
616  if (rc)
617  goto out_end;
618 
619  cmd->last_xfer_len = 0;
620 
621  ide_debug_log(IDE_DBG_PC, "data transfer, rq->cmd_type: 0x%x, "
622  "ireason: 0x%x",
623  rq->cmd_type, ireason);
624 
625  /* transfer data */
626  while (thislen > 0) {
627  int blen = min_t(int, thislen, cmd->nleft);
628 
629  if (cmd->nleft == 0)
630  break;
631 
632  ide_pio_bytes(drive, cmd, write, blen);
633  cmd->last_xfer_len += blen;
634 
635  thislen -= blen;
636  len -= blen;
637 
638  if (sense && write == 0)
639  rq->sense_len += blen;
640  }
641 
642  /* pad, if necessary */
643  if (len > 0) {
644  if (rq->cmd_type != REQ_TYPE_FS || write == 0)
645  ide_pad_transfer(drive, write, len);
646  else {
647  printk(KERN_ERR PFX "%s: confused, missing data\n",
648  drive->name);
649  blk_dump_rq_flags(rq, "cdrom_newpc_intr");
650  }
651  }
652 
653  if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
654  timeout = rq->timeout;
655  } else {
656  timeout = ATAPI_WAIT_PC;
657  if (rq->cmd_type != REQ_TYPE_FS)
658  expiry = ide_cd_expiry;
659  }
660 
661  hwif->expiry = expiry;
662  ide_set_handler(drive, cdrom_newpc_intr, timeout);
663  return ide_started;
664 
665 out_end:
666  if (rq->cmd_type == REQ_TYPE_BLOCK_PC && rc == 0) {
667  rq->resid_len = 0;
668  blk_end_request_all(rq, 0);
669  hwif->rq = NULL;
670  } else {
671  if (sense && uptodate)
672  ide_cd_complete_failed_rq(drive, rq);
673 
674  if (rq->cmd_type == REQ_TYPE_FS) {
675  if (cmd->nleft == 0)
676  uptodate = 1;
677  } else {
678  if (uptodate <= 0 && rq->errors == 0)
679  rq->errors = -EIO;
680  }
681 
682  if (uptodate == 0 && rq->bio)
683  if (ide_cd_error_cmd(drive, cmd))
684  return ide_stopped;
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;
781  unsigned int nsectors;
782 
783  ide_debug_log(IDE_DBG_RQ, "cmd: 0x%x, block: %llu",
784  rq->cmd[0], (unsigned long long)block);
785 
786  if (drive->debug_mask & IDE_DBG_RQ)
787  blk_dump_rq_flags(rq, "ide_cd_do_request");
788 
789  switch (rq->cmd_type) {
790  case REQ_TYPE_FS:
791  if (cdrom_start_rw(drive, rq) == ide_stopped)
792  goto out_end;
793  break;
794  case REQ_TYPE_SENSE:
795  case REQ_TYPE_BLOCK_PC:
796  case REQ_TYPE_ATA_PC:
797  if (!rq->timeout)
798  rq->timeout = ATAPI_WAIT_PC;
799 
800  cdrom_do_block_pc(drive, rq);
801  break;
802  case REQ_TYPE_SPECIAL:
803  /* right now this can only be a reset... */
804  uptodate = 1;
805  goto out_end;
806  default:
807  BUG();
808  }
809 
810  /* prepare sense request for this command */
811  ide_prep_sense(drive, rq);
812 
813  memset(&cmd, 0, sizeof(cmd));
814 
815  if (rq_data_dir(rq))
816  cmd.tf_flags |= IDE_TFLAG_WRITE;
817 
818  cmd.rq = rq;
819 
820  if (rq->cmd_type == REQ_TYPE_FS || blk_rq_bytes(rq)) {
821  ide_init_sg_cmd(&cmd, blk_rq_bytes(rq));
822  ide_map_sg(drive, &cmd);
823  }
824 
825  return ide_issue_pc(drive, &cmd);
826 out_end:
827  nsectors = blk_rq_sectors(rq);
828 
829  if (nsectors == 0)
830  nsectors = 1;
831 
832  ide_complete_rq(drive, uptodate ? 0 : -EIO, nsectors << 9);
833 
834  return ide_stopped;
835 }
836 
837 /*
838  * Ioctl handling.
839  *
840  * Routines which queue packet commands take as a final argument a pointer to a
841  * request_sense struct. If execution of the command results in an error with a
842  * CHECK CONDITION status, this structure will be filled with the results of the
843  * subsequent request sense command. The pointer can also be NULL, in which case
844  * no sense information is returned.
845  */
846 static void msf_from_bcd(struct atapi_msf *msf)
847 {
848  msf->minute = bcd2bin(msf->minute);
849  msf->second = bcd2bin(msf->second);
850  msf->frame = bcd2bin(msf->frame);
851 }
852 
853 int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
854 {
855  struct cdrom_info *info = drive->driver_data;
856  struct cdrom_device_info *cdi = &info->devinfo;
857  unsigned char cmd[BLK_MAX_CDB];
858 
859  ide_debug_log(IDE_DBG_FUNC, "enter");
860 
861  memset(cmd, 0, BLK_MAX_CDB);
862  cmd[0] = GPCMD_TEST_UNIT_READY;
863 
864  /*
865  * Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to switch CDs
866  * instead of supporting the LOAD_UNLOAD opcode.
867  */
868  cmd[7] = cdi->sanyo_slot % 3;
869 
870  return ide_cd_queue_pc(drive, cmd, 0, NULL, NULL, sense, 0, REQ_QUIET);
871 }
872 
873 static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
874  unsigned long *sectors_per_frame,
875  struct request_sense *sense)
876 {
877  struct {
878  __be32 lba;
879  __be32 blocklen;
880  } capbuf;
881 
882  int stat;
883  unsigned char cmd[BLK_MAX_CDB];
884  unsigned len = sizeof(capbuf);
885  u32 blocklen;
886 
887  ide_debug_log(IDE_DBG_FUNC, "enter");
888 
889  memset(cmd, 0, BLK_MAX_CDB);
890  cmd[0] = GPCMD_READ_CDVD_CAPACITY;
891 
892  stat = ide_cd_queue_pc(drive, cmd, 0, &capbuf, &len, sense, 0,
893  REQ_QUIET);
894  if (stat)
895  return stat;
896 
897  /*
898  * Sanity check the given block size, in so far as making
899  * sure the sectors_per_frame we give to the caller won't
900  * end up being bogus.
901  */
902  blocklen = be32_to_cpu(capbuf.blocklen);
903  blocklen = (blocklen >> SECTOR_BITS) << SECTOR_BITS;
904  switch (blocklen) {
905  case 512:
906  case 1024:
907  case 2048:
908  case 4096:
909  break;
910  default:
911  printk_once(KERN_ERR PFX "%s: weird block size %u; "
912  "setting default block size to 2048\n",
913  drive->name, blocklen);
914  blocklen = 2048;
915  break;
916  }
917 
918  *capacity = 1 + be32_to_cpu(capbuf.lba);
919  *sectors_per_frame = blocklen >> SECTOR_BITS;
920 
921  ide_debug_log(IDE_DBG_PROBE, "cap: %lu, sectors_per_frame: %lu",
922  *capacity, *sectors_per_frame);
923 
924  return 0;
925 }
926 
927 static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
928  int format, char *buf, int buflen,
929  struct request_sense *sense)
930 {
931  unsigned char cmd[BLK_MAX_CDB];
932 
933  ide_debug_log(IDE_DBG_FUNC, "enter");
934 
935  memset(cmd, 0, BLK_MAX_CDB);
936 
937  cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
938  cmd[6] = trackno;
939  cmd[7] = (buflen >> 8);
940  cmd[8] = (buflen & 0xff);
941  cmd[9] = (format << 6);
942 
943  if (msf_flag)
944  cmd[1] = 2;
945 
946  return ide_cd_queue_pc(drive, cmd, 0, buf, &buflen, sense, 0, REQ_QUIET);
947 }
948 
949 /* Try to read the entire TOC for the disk into our internal buffer. */
950 int ide_cd_read_toc(ide_drive_t *drive, struct request_sense *sense)
951 {
952  int stat, ntracks, i;
953  struct cdrom_info *info = drive->driver_data;
954  struct cdrom_device_info *cdi = &info->devinfo;
955  struct atapi_toc *toc = info->toc;
956  struct {
957  struct atapi_toc_header hdr;
958  struct atapi_toc_entry ent;
959  } ms_tmp;
960  long last_written;
961  unsigned long sectors_per_frame = SECTORS_PER_FRAME;
962 
963  ide_debug_log(IDE_DBG_FUNC, "enter");
964 
965  if (toc == NULL) {
966  /* try to allocate space */
967  toc = kmalloc(sizeof(struct atapi_toc), GFP_KERNEL);
968  if (toc == NULL) {
969  printk(KERN_ERR PFX "%s: No cdrom TOC buffer!\n",
970  drive->name);
971  return -ENOMEM;
972  }
973  info->toc = toc;
974  }
975 
976  /*
977  * Check to see if the existing data is still valid. If it is,
978  * just return.
979  */
980  (void) cdrom_check_status(drive, sense);
981 
982  if (drive->atapi_flags & IDE_AFLAG_TOC_VALID)
983  return 0;
984 
985  /* try to get the total cdrom capacity and sector size */
986  stat = cdrom_read_capacity(drive, &toc->capacity, &sectors_per_frame,
987  sense);
988  if (stat)
989  toc->capacity = 0x1fffff;
990 
991  set_capacity(info->disk, toc->capacity * sectors_per_frame);
992  /* save a private copy of the TOC capacity for error handling */
993  drive->probed_capacity = toc->capacity * sectors_per_frame;
994 
995  blk_queue_logical_block_size(drive->queue,
996  sectors_per_frame << SECTOR_BITS);
997 
998  /* first read just the header, so we know how long the TOC is */
999  stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
1000  sizeof(struct atapi_toc_header), sense);
1001  if (stat)
1002  return stat;
1003 
1004  if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1005  toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1006  toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1007  }
1008 
1009  ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
1010  if (ntracks <= 0)
1011  return -EIO;
1012  if (ntracks > MAX_TRACKS)
1013  ntracks = MAX_TRACKS;
1014 
1015  /* now read the whole schmeer */
1016  stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
1017  (char *)&toc->hdr,
1018  sizeof(struct atapi_toc_header) +
1019  (ntracks + 1) *
1020  sizeof(struct atapi_toc_entry), sense);
1021 
1022  if (stat && toc->hdr.first_track > 1) {
1023  /*
1024  * Cds with CDI tracks only don't have any TOC entries, despite
1025  * of this the returned values are
1026  * first_track == last_track = number of CDI tracks + 1,
1027  * so that this case is indistinguishable from the same layout
1028  * plus an additional audio track. If we get an error for the
1029  * regular case, we assume a CDI without additional audio
1030  * tracks. In this case the readable TOC is empty (CDI tracks
1031  * are not included) and only holds the Leadout entry.
1032  *
1033  * Heiko Eißfeldt.
1034  */
1035  ntracks = 0;
1036  stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
1037  (char *)&toc->hdr,
1038  sizeof(struct atapi_toc_header) +
1039  (ntracks + 1) *
1040  sizeof(struct atapi_toc_entry),
1041  sense);
1042  if (stat)
1043  return stat;
1044 
1045  if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1046  toc->hdr.first_track = (u8)bin2bcd(CDROM_LEADOUT);
1047  toc->hdr.last_track = (u8)bin2bcd(CDROM_LEADOUT);
1048  } else {
1049  toc->hdr.first_track = CDROM_LEADOUT;
1050  toc->hdr.last_track = CDROM_LEADOUT;
1051  }
1052  }
1053 
1054  if (stat)
1055  return stat;
1056 
1057  toc->hdr.toc_length = be16_to_cpu(toc->hdr.toc_length);
1058 
1059  if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD) {
1060  toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
1061  toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
1062  }
1063 
1064  for (i = 0; i <= ntracks; i++) {
1065  if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1066  if (drive->atapi_flags & IDE_AFLAG_TOCTRACKS_AS_BCD)
1067  toc->ent[i].track = bcd2bin(toc->ent[i].track);
1068  msf_from_bcd(&toc->ent[i].addr.msf);
1069  }
1070  toc->ent[i].addr.lba = msf_to_lba(toc->ent[i].addr.msf.minute,
1071  toc->ent[i].addr.msf.second,
1072  toc->ent[i].addr.msf.frame);
1073  }
1074 
1075  if (toc->hdr.first_track != CDROM_LEADOUT) {
1076  /* read the multisession information */
1077  stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
1078  sizeof(ms_tmp), sense);
1079  if (stat)
1080  return stat;
1081 
1082  toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
1083  } else {
1084  ms_tmp.hdr.last_track = CDROM_LEADOUT;
1085  ms_tmp.hdr.first_track = ms_tmp.hdr.last_track;
1086  toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
1087  }
1088 
1089  if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
1090  /* re-read multisession information using MSF format */
1091  stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
1092  sizeof(ms_tmp), sense);
1093  if (stat)
1094  return stat;
1095 
1096  msf_from_bcd(&ms_tmp.ent.addr.msf);
1097  toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
1098  ms_tmp.ent.addr.msf.second,
1099  ms_tmp.ent.addr.msf.frame);
1100  }
1101 
1102  toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
1103 
1104  /* now try to get the total cdrom capacity */
1105  stat = cdrom_get_last_written(cdi, &last_written);
1106  if (!stat && (last_written > toc->capacity)) {
1107  toc->capacity = last_written;
1108  set_capacity(info->disk, toc->capacity * sectors_per_frame);
1109  drive->probed_capacity = toc->capacity * sectors_per_frame;
1110  }
1111 
1112  /* Remember that we've read this stuff. */
1113  drive->atapi_flags |= IDE_AFLAG_TOC_VALID;
1114 
1115  return 0;
1116 }
1117 
1118 int ide_cdrom_get_capabilities(ide_drive_t *drive, u8 *buf)
1119 {
1120  struct cdrom_info *info = drive->driver_data;
1121  struct cdrom_device_info *cdi = &info->devinfo;
1122  struct packet_command cgc;
1123  int stat, attempts = 3, size = ATAPI_CAPABILITIES_PAGE_SIZE;
1124 
1125  ide_debug_log(IDE_DBG_FUNC, "enter");
1126 
1127  if ((drive->atapi_flags & IDE_AFLAG_FULL_CAPS_PAGE) == 0)
1128  size -= ATAPI_CAPABILITIES_PAGE_PAD_SIZE;
1129 
1130  init_cdrom_command(&cgc, buf, size, CGC_DATA_UNKNOWN);
1131  do {
1132  /* we seem to get stat=0x01,err=0x00 the first time (??) */
1133  stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
1134  if (!stat)
1135  break;
1136  } while (--attempts);
1137  return stat;
1138 }
1139 
1140 void ide_cdrom_update_speed(ide_drive_t *drive, u8 *buf)
1141 {
1142  struct cdrom_info *cd = drive->driver_data;
1143  u16 curspeed, maxspeed;
1144 
1145  ide_debug_log(IDE_DBG_FUNC, "enter");
1146 
1147  if (drive->atapi_flags & IDE_AFLAG_LE_SPEED_FIELDS) {
1148  curspeed = le16_to_cpup((__le16 *)&buf[8 + 14]);
1149  maxspeed = le16_to_cpup((__le16 *)&buf[8 + 8]);
1150  } else {
1151  curspeed = be16_to_cpup((__be16 *)&buf[8 + 14]);
1152  maxspeed = be16_to_cpup((__be16 *)&buf[8 + 8]);
1153  }
1154 
1155  ide_debug_log(IDE_DBG_PROBE, "curspeed: %u, maxspeed: %u",
1156  curspeed, maxspeed);
1157 
1158  cd->current_speed = DIV_ROUND_CLOSEST(curspeed, 176);
1159  cd->max_speed = DIV_ROUND_CLOSEST(maxspeed, 176);
1160 }
1161 
1162 #define IDE_CD_CAPABILITIES \
1163  (CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | CDC_SELECT_SPEED | \
1164  CDC_SELECT_DISC | CDC_MULTI_SESSION | CDC_MCN | CDC_MEDIA_CHANGED | \
1165  CDC_PLAY_AUDIO | CDC_RESET | CDC_DRIVE_STATUS | CDC_CD_R | \
1166  CDC_CD_RW | CDC_DVD | CDC_DVD_R | CDC_DVD_RAM | CDC_GENERIC_PACKET | \
1167  CDC_MO_DRIVE | CDC_MRW | CDC_MRW_W | CDC_RAM)
1168 
1169 static struct cdrom_device_ops ide_cdrom_dops = {
1170  .open = ide_cdrom_open_real,
1171  .release = ide_cdrom_release_real,
1172  .drive_status = ide_cdrom_drive_status,
1173  .check_events = ide_cdrom_check_events_real,
1174  .tray_move = ide_cdrom_tray_move,
1175  .lock_door = ide_cdrom_lock_door,
1176  .select_speed = ide_cdrom_select_speed,
1177  .get_last_session = ide_cdrom_get_last_session,
1178  .get_mcn = ide_cdrom_get_mcn,
1179  .reset = ide_cdrom_reset,
1180  .audio_ioctl = ide_cdrom_audio_ioctl,
1181  .capability = IDE_CD_CAPABILITIES,
1182  .generic_packet = ide_cdrom_packet,
1183 };
1184 
1185 static int ide_cdrom_register(ide_drive_t *drive, int nslots)
1186 {
1187  struct cdrom_info *info = drive->driver_data;
1188  struct cdrom_device_info *devinfo = &info->devinfo;
1189 
1190  ide_debug_log(IDE_DBG_PROBE, "nslots: %d", nslots);
1191 
1192  devinfo->ops = &ide_cdrom_dops;
1193  devinfo->speed = info->current_speed;
1194  devinfo->capacity = nslots;
1195  devinfo->handle = drive;
1196  strcpy(devinfo->name, drive->name);
1197 
1198  if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
1199  devinfo->mask |= CDC_SELECT_SPEED;
1200 
1201  devinfo->disk = info->disk;
1202  return register_cdrom(devinfo);
1203 }
1204 
1205 static int ide_cdrom_probe_capabilities(ide_drive_t *drive)
1206 {
1207  struct cdrom_info *cd = drive->driver_data;
1208  struct cdrom_device_info *cdi = &cd->devinfo;
1209  u8 buf[ATAPI_CAPABILITIES_PAGE_SIZE];
1210  mechtype_t mechtype;
1211  int nslots = 1;
1212 
1213  ide_debug_log(IDE_DBG_PROBE, "media: 0x%x, atapi_flags: 0x%lx",
1214  drive->media, drive->atapi_flags);
1215 
1216  cdi->mask = (CDC_CD_R | CDC_CD_RW | CDC_DVD | CDC_DVD_R |
1217  CDC_DVD_RAM | CDC_SELECT_DISC | CDC_PLAY_AUDIO |
1218  CDC_MO_DRIVE | CDC_RAM);
1219 
1220  if (drive->media == ide_optical) {
1221  cdi->mask &= ~(CDC_MO_DRIVE | CDC_RAM);
1222  printk(KERN_ERR PFX "%s: ATAPI magneto-optical drive\n",
1223  drive->name);
1224  return nslots;
1225  }
1226 
1227  if (drive->atapi_flags & IDE_AFLAG_PRE_ATAPI12) {
1228  drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1229  cdi->mask &= ~CDC_PLAY_AUDIO;
1230  return nslots;
1231  }
1232 
1233  /*
1234  * We have to cheat a little here. the packet will eventually be queued
1235  * with ide_cdrom_packet(), which extracts the drive from cdi->handle.
1236  * Since this device hasn't been registered with the Uniform layer yet,
1237  * it can't do this. Same goes for cdi->ops.
1238  */
1239  cdi->handle = drive;
1240  cdi->ops = &ide_cdrom_dops;
1241 
1242  if (ide_cdrom_get_capabilities(drive, buf))
1243  return 0;
1244 
1245  if ((buf[8 + 6] & 0x01) == 0)
1246  drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
1247  if (buf[8 + 6] & 0x08)
1248  drive->atapi_flags &= ~IDE_AFLAG_NO_EJECT;
1249  if (buf[8 + 3] & 0x01)
1250  cdi->mask &= ~CDC_CD_R;
1251  if (buf[8 + 3] & 0x02)
1252  cdi->mask &= ~(CDC_CD_RW | CDC_RAM);
1253  if (buf[8 + 2] & 0x38)
1254  cdi->mask &= ~CDC_DVD;
1255  if (buf[8 + 3] & 0x20)
1256  cdi->mask &= ~(CDC_DVD_RAM | CDC_RAM);
1257  if (buf[8 + 3] & 0x10)
1258  cdi->mask &= ~CDC_DVD_R;
1259  if ((buf[8 + 4] & 0x01) || (drive->atapi_flags & IDE_AFLAG_PLAY_AUDIO_OK))
1260  cdi->mask &= ~CDC_PLAY_AUDIO;
1261 
1262  mechtype = buf[8 + 6] >> 5;
1263  if (mechtype == mechtype_caddy ||
1264  mechtype == mechtype_popup ||
1265  (drive->atapi_flags & IDE_AFLAG_NO_AUTOCLOSE))
1266  cdi->mask |= CDC_CLOSE_TRAY;
1267 
1268  if (cdi->sanyo_slot > 0) {
1269  cdi->mask &= ~CDC_SELECT_DISC;
1270  nslots = 3;
1271  } else if (mechtype == mechtype_individual_changer ||
1272  mechtype == mechtype_cartridge_changer) {
1273  nslots = cdrom_number_of_slots(cdi);
1274  if (nslots > 1)
1275  cdi->mask &= ~CDC_SELECT_DISC;
1276  }
1277 
1278  ide_cdrom_update_speed(drive, buf);
1279 
1280  printk(KERN_INFO PFX "%s: ATAPI", drive->name);
1281 
1282  /* don't print speed if the drive reported 0 */
1283  if (cd->max_speed)
1284  printk(KERN_CONT " %dX", cd->max_speed);
1285 
1286  printk(KERN_CONT " %s", (cdi->mask & CDC_DVD) ? "CD-ROM" : "DVD-ROM");
1287 
1288  if ((cdi->mask & CDC_DVD_R) == 0 || (cdi->mask & CDC_DVD_RAM) == 0)
1289  printk(KERN_CONT " DVD%s%s",
1290  (cdi->mask & CDC_DVD_R) ? "" : "-R",
1291  (cdi->mask & CDC_DVD_RAM) ? "" : "/RAM");
1292 
1293  if ((cdi->mask & CDC_CD_R) == 0 || (cdi->mask & CDC_CD_RW) == 0)
1294  printk(KERN_CONT " CD%s%s",
1295  (cdi->mask & CDC_CD_R) ? "" : "-R",
1296  (cdi->mask & CDC_CD_RW) ? "" : "/RW");
1297 
1298  if ((cdi->mask & CDC_SELECT_DISC) == 0)
1299  printk(KERN_CONT " changer w/%d slots", nslots);
1300  else
1301  printk(KERN_CONT " drive");
1302 
1303  printk(KERN_CONT ", %dkB Cache\n",
1304  be16_to_cpup((__be16 *)&buf[8 + 12]));
1305 
1306  return nslots;
1307 }
1308 
1309 /* standard prep_rq_fn that builds 10 byte cmds */
1310 static int ide_cdrom_prep_fs(struct request_queue *q, struct request *rq)
1311 {
1312  int hard_sect = queue_logical_block_size(q);
1313  long block = (long)blk_rq_pos(rq) / (hard_sect >> 9);
1314  unsigned long blocks = blk_rq_sectors(rq) / (hard_sect >> 9);
1315 
1316  memset(rq->cmd, 0, BLK_MAX_CDB);
1317 
1318  if (rq_data_dir(rq) == READ)
1319  rq->cmd[0] = GPCMD_READ_10;
1320  else
1321  rq->cmd[0] = GPCMD_WRITE_10;
1322 
1323  /*
1324  * fill in lba
1325  */
1326  rq->cmd[2] = (block >> 24) & 0xff;
1327  rq->cmd[3] = (block >> 16) & 0xff;
1328  rq->cmd[4] = (block >> 8) & 0xff;
1329  rq->cmd[5] = block & 0xff;
1330 
1331  /*
1332  * and transfer length
1333  */
1334  rq->cmd[7] = (blocks >> 8) & 0xff;
1335  rq->cmd[8] = blocks & 0xff;
1336  rq->cmd_len = 10;
1337  return BLKPREP_OK;
1338 }
1339 
1340 /*
1341  * Most of the SCSI commands are supported directly by ATAPI devices.
1342  * This transform handles the few exceptions.
1343  */
1344 static int ide_cdrom_prep_pc(struct request *rq)
1345 {
1346  u8 *c = rq->cmd;
1347 
1348  /* transform 6-byte read/write commands to the 10-byte version */
1349  if (c[0] == READ_6 || c[0] == WRITE_6) {
1350  c[8] = c[4];
1351  c[5] = c[3];
1352  c[4] = c[2];
1353  c[3] = c[1] & 0x1f;
1354  c[2] = 0;
1355  c[1] &= 0xe0;
1356  c[0] += (READ_10 - READ_6);
1357  rq->cmd_len = 10;
1358  return BLKPREP_OK;
1359  }
1360 
1361  /*
1362  * it's silly to pretend we understand 6-byte sense commands, just
1363  * reject with ILLEGAL_REQUEST and the caller should take the
1364  * appropriate action
1365  */
1366  if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
1367  rq->errors = ILLEGAL_REQUEST;
1368  return BLKPREP_KILL;
1369  }
1370 
1371  return BLKPREP_OK;
1372 }
1373 
1374 static int ide_cdrom_prep_fn(struct request_queue *q, struct request *rq)
1375 {
1376  if (rq->cmd_type == REQ_TYPE_FS)
1377  return ide_cdrom_prep_fs(q, rq);
1378  else if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
1379  return ide_cdrom_prep_pc(rq);
1380 
1381  return 0;
1382 }
1383 
1384 struct cd_list_entry {
1385  const char *id_model;
1386  const char *id_firmware;
1387  unsigned int cd_flags;
1388 };
1389 
1390 #ifdef CONFIG_IDE_PROC_FS
1391 static sector_t ide_cdrom_capacity(ide_drive_t *drive)
1392 {
1393  unsigned long capacity, sectors_per_frame;
1394 
1395  if (cdrom_read_capacity(drive, &capacity, &sectors_per_frame, NULL))
1396  return 0;
1397 
1398  return capacity * sectors_per_frame;
1399 }
1400 
1401 static int idecd_capacity_proc_show(struct seq_file *m, void *v)
1402 {
1403  ide_drive_t *drive = m->private;
1404 
1405  seq_printf(m, "%llu\n", (long long)ide_cdrom_capacity(drive));
1406  return 0;
1407 }
1408 
1409 static int idecd_capacity_proc_open(struct inode *inode, struct file *file)
1410 {
1411  return single_open(file, idecd_capacity_proc_show, PDE(inode)->data);
1412 }
1413 
1414 static const struct file_operations idecd_capacity_proc_fops = {
1415  .owner = THIS_MODULE,
1416  .open = idecd_capacity_proc_open,
1417  .read = seq_read,
1418  .llseek = seq_lseek,
1419  .release = single_release,
1420 };
1421 
1422 static ide_proc_entry_t idecd_proc[] = {
1423  { "capacity", S_IFREG|S_IRUGO, &idecd_capacity_proc_fops },
1424  {}
1425 };
1426 
1427 static ide_proc_entry_t *ide_cd_proc_entries(ide_drive_t *drive)
1428 {
1429  return idecd_proc;
1430 }
1431 
1432 static const struct ide_proc_devset *ide_cd_proc_devsets(ide_drive_t *drive)
1433 {
1434  return NULL;
1435 }
1436 #endif
1437 
1438 static const struct cd_list_entry ide_cd_quirks_list[] = {
1439  /* SCR-3231 doesn't support the SET_CD_SPEED command. */
1440  { "SAMSUNG CD-ROM SCR-3231", NULL, IDE_AFLAG_NO_SPEED_SELECT },
1441  /* Old NEC260 (not R) was released before ATAPI 1.2 spec. */
1442  { "NEC CD-ROM DRIVE:260", "1.01", IDE_AFLAG_TOCADDR_AS_BCD |
1443  IDE_AFLAG_PRE_ATAPI12, },
1444  /* Vertos 300, some versions of this drive like to talk BCD. */
1445  { "V003S0DS", NULL, IDE_AFLAG_VERTOS_300_SSD, },
1446  /* Vertos 600 ESD. */
1447  { "V006E0DS", NULL, IDE_AFLAG_VERTOS_600_ESD, },
1448  /*
1449  * Sanyo 3 CD changer uses a non-standard command for CD changing
1450  * (by default standard ATAPI support for CD changers is used).
1451  */
1452  { "CD-ROM CDR-C3 G", NULL, IDE_AFLAG_SANYO_3CD },
1453  { "CD-ROM CDR-C3G", NULL, IDE_AFLAG_SANYO_3CD },
1454  { "CD-ROM CDR_C36", NULL, IDE_AFLAG_SANYO_3CD },
1455  /* Stingray 8X CD-ROM. */
1456  { "STINGRAY 8422 IDE 8X CD-ROM 7-27-95", NULL, IDE_AFLAG_PRE_ATAPI12 },
1457  /*
1458  * ACER 50X CD-ROM and WPI 32X CD-ROM require the full spec length
1459  * mode sense page capabilities size, but older drives break.
1460  */
1461  { "ATAPI CD ROM DRIVE 50X MAX", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1462  { "WPI CDS-32X", NULL, IDE_AFLAG_FULL_CAPS_PAGE },
1463  /* ACER/AOpen 24X CD-ROM has the speed fields byte-swapped. */
1464  { "", "241N", IDE_AFLAG_LE_SPEED_FIELDS },
1465  /*
1466  * Some drives used by Apple don't advertise audio play
1467  * but they do support reading TOC & audio datas.
1468  */
1469  { "MATSHITADVD-ROM SR-8187", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1470  { "MATSHITADVD-ROM SR-8186", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1471  { "MATSHITADVD-ROM SR-8176", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1472  { "MATSHITADVD-ROM SR-8174", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1473  { "Optiarc DVD RW AD-5200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1474  { "Optiarc DVD RW AD-7200A", NULL, IDE_AFLAG_PLAY_AUDIO_OK },
1475  { "Optiarc DVD RW AD-7543A", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1476  { "TEAC CD-ROM CD-224E", NULL, IDE_AFLAG_NO_AUTOCLOSE },
1477  { NULL, NULL, 0 }
1478 };
1479 
1480 static unsigned int ide_cd_flags(u16 *id)
1481 {
1482  const struct cd_list_entry *cle = ide_cd_quirks_list;
1483 
1484  while (cle->id_model) {
1485  if (strcmp(cle->id_model, (char *)&id[ATA_ID_PROD]) == 0 &&
1486  (cle->id_firmware == NULL ||
1487  strstr((char *)&id[ATA_ID_FW_REV], cle->id_firmware)))
1488  return cle->cd_flags;
1489  cle++;
1490  }
1491 
1492  return 0;
1493 }
1494 
1495 static int ide_cdrom_setup(ide_drive_t *drive)
1496 {
1497  struct cdrom_info *cd = drive->driver_data;
1498  struct cdrom_device_info *cdi = &cd->devinfo;
1499  struct request_queue *q = drive->queue;
1500  u16 *id = drive->id;
1501  char *fw_rev = (char *)&id[ATA_ID_FW_REV];
1502  int nslots;
1503 
1504  ide_debug_log(IDE_DBG_PROBE, "enter");
1505 
1506  blk_queue_prep_rq(q, ide_cdrom_prep_fn);
1507  blk_queue_dma_alignment(q, 31);
1508  blk_queue_update_dma_pad(q, 15);
1509 
1510  drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
1511  drive->atapi_flags = IDE_AFLAG_NO_EJECT | ide_cd_flags(id);
1512 
1513  if ((drive->atapi_flags & IDE_AFLAG_VERTOS_300_SSD) &&
1514  fw_rev[4] == '1' && fw_rev[6] <= '2')
1515  drive->atapi_flags |= (IDE_AFLAG_TOCTRACKS_AS_BCD |
1516  IDE_AFLAG_TOCADDR_AS_BCD);
1517  else if ((drive->atapi_flags & IDE_AFLAG_VERTOS_600_ESD) &&
1518  fw_rev[4] == '1' && fw_rev[6] <= '2')
1519  drive->atapi_flags |= IDE_AFLAG_TOCTRACKS_AS_BCD;
1520  else if (drive->atapi_flags & IDE_AFLAG_SANYO_3CD)
1521  /* 3 => use CD in slot 0 */
1522  cdi->sanyo_slot = 3;
1523 
1524  nslots = ide_cdrom_probe_capabilities(drive);
1525 
1526  blk_queue_logical_block_size(q, CD_FRAMESIZE);
1527 
1528  if (ide_cdrom_register(drive, nslots)) {
1529  printk(KERN_ERR PFX "%s: %s failed to register device with the"
1530  " cdrom driver.\n", drive->name, __func__);
1531  cd->devinfo.handle = NULL;
1532  return 1;
1533  }
1534 
1535  ide_proc_register_driver(drive, cd->driver);
1536  return 0;
1537 }
1538 
1539 static void ide_cd_remove(ide_drive_t *drive)
1540 {
1541  struct cdrom_info *info = drive->driver_data;
1542 
1543  ide_debug_log(IDE_DBG_FUNC, "enter");
1544 
1545  ide_proc_unregister_driver(drive, info->driver);
1546  device_del(&info->dev);
1547  del_gendisk(info->disk);
1548 
1549  mutex_lock(&idecd_ref_mutex);
1550  put_device(&info->dev);
1551  mutex_unlock(&idecd_ref_mutex);
1552 }
1553 
1554 static void ide_cd_release(struct device *dev)
1555 {
1556  struct cdrom_info *info = to_ide_drv(dev, cdrom_info);
1557  struct cdrom_device_info *devinfo = &info->devinfo;
1558  ide_drive_t *drive = info->drive;
1559  struct gendisk *g = info->disk;
1560 
1561  ide_debug_log(IDE_DBG_FUNC, "enter");
1562 
1563  kfree(info->toc);
1564  if (devinfo->handle == drive)
1565  unregister_cdrom(devinfo);
1566  drive->driver_data = NULL;
1567  blk_queue_prep_rq(drive->queue, NULL);
1568  g->private_data = NULL;
1569  put_disk(g);
1570  kfree(info);
1571 }
1572 
1573 static int ide_cd_probe(ide_drive_t *);
1574 
1575 static struct ide_driver ide_cdrom_driver = {
1576  .gen_driver = {
1577  .owner = THIS_MODULE,
1578  .name = "ide-cdrom",
1579  .bus = &ide_bus_type,
1580  },
1581  .probe = ide_cd_probe,
1582  .remove = ide_cd_remove,
1583  .version = IDECD_VERSION,
1584  .do_request = ide_cd_do_request,
1585 #ifdef CONFIG_IDE_PROC_FS
1586  .proc_entries = ide_cd_proc_entries,
1587  .proc_devsets = ide_cd_proc_devsets,
1588 #endif
1589 };
1590 
1591 static int idecd_open(struct block_device *bdev, fmode_t mode)
1592 {
1593  struct cdrom_info *info;
1594  int rc = -ENXIO;
1595 
1596  mutex_lock(&ide_cd_mutex);
1597  info = ide_cd_get(bdev->bd_disk);
1598  if (!info)
1599  goto out;
1600 
1601  rc = cdrom_open(&info->devinfo, bdev, mode);
1602  if (rc < 0)
1603  ide_cd_put(info);
1604 out:
1605  mutex_unlock(&ide_cd_mutex);
1606  return rc;
1607 }
1608 
1609 static int idecd_release(struct gendisk *disk, fmode_t mode)
1610 {
1611  struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1612 
1613  mutex_lock(&ide_cd_mutex);
1614  cdrom_release(&info->devinfo, mode);
1615 
1616  ide_cd_put(info);
1617  mutex_unlock(&ide_cd_mutex);
1618 
1619  return 0;
1620 }
1621 
1622 static int idecd_set_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1623 {
1624  struct packet_command cgc;
1625  char buffer[16];
1626  int stat;
1627  char spindown;
1628 
1629  if (copy_from_user(&spindown, (void __user *)arg, sizeof(char)))
1630  return -EFAULT;
1631 
1632  init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1633 
1634  stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1635  if (stat)
1636  return stat;
1637 
1638  buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
1639  return cdrom_mode_select(cdi, &cgc);
1640 }
1641 
1642 static int idecd_get_spindown(struct cdrom_device_info *cdi, unsigned long arg)
1643 {
1644  struct packet_command cgc;
1645  char buffer[16];
1646  int stat;
1647  char spindown;
1648 
1649  init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
1650 
1651  stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0);
1652  if (stat)
1653  return stat;
1654 
1655  spindown = buffer[11] & 0x0f;
1656  if (copy_to_user((void __user *)arg, &spindown, sizeof(char)))
1657  return -EFAULT;
1658  return 0;
1659 }
1660 
1661 static int idecd_locked_ioctl(struct block_device *bdev, fmode_t mode,
1662  unsigned int cmd, unsigned long arg)
1663 {
1664  struct cdrom_info *info = ide_drv_g(bdev->bd_disk, cdrom_info);
1665  int err;
1666 
1667  switch (cmd) {
1668  case CDROMSETSPINDOWN:
1669  return idecd_set_spindown(&info->devinfo, arg);
1670  case CDROMGETSPINDOWN:
1671  return idecd_get_spindown(&info->devinfo, arg);
1672  default:
1673  break;
1674  }
1675 
1676  err = generic_ide_ioctl(info->drive, bdev, cmd, arg);
1677  if (err == -EINVAL)
1678  err = cdrom_ioctl(&info->devinfo, bdev, mode, cmd, arg);
1679 
1680  return err;
1681 }
1682 
1683 static int idecd_ioctl(struct block_device *bdev, fmode_t mode,
1684  unsigned int cmd, unsigned long arg)
1685 {
1686  int ret;
1687 
1688  mutex_lock(&ide_cd_mutex);
1689  ret = idecd_locked_ioctl(bdev, mode, cmd, arg);
1690  mutex_unlock(&ide_cd_mutex);
1691 
1692  return ret;
1693 }
1694 
1695 
1696 static unsigned int idecd_check_events(struct gendisk *disk,
1697  unsigned int clearing)
1698 {
1699  struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1700  return cdrom_check_events(&info->devinfo, clearing);
1701 }
1702 
1703 static int idecd_revalidate_disk(struct gendisk *disk)
1704 {
1705  struct cdrom_info *info = ide_drv_g(disk, cdrom_info);
1706  struct request_sense sense;
1707 
1708  ide_cd_read_toc(info->drive, &sense);
1709 
1710  return 0;
1711 }
1712 
1713 static const struct block_device_operations idecd_ops = {
1714  .owner = THIS_MODULE,
1715  .open = idecd_open,
1716  .release = idecd_release,
1717  .ioctl = idecd_ioctl,
1718  .check_events = idecd_check_events,
1719  .revalidate_disk = idecd_revalidate_disk
1720 };
1721 
1722 /* module options */
1723 static unsigned long debug_mask;
1724 module_param(debug_mask, ulong, 0644);
1725 
1726 MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
1727 
1728 static int ide_cd_probe(ide_drive_t *drive)
1729 {
1730  struct cdrom_info *info;
1731  struct gendisk *g;
1732  struct request_sense sense;
1733 
1734  ide_debug_log(IDE_DBG_PROBE, "driver_req: %s, media: 0x%x",
1735  drive->driver_req, drive->media);
1736 
1737  if (!strstr("ide-cdrom", drive->driver_req))
1738  goto failed;
1739 
1740  if (drive->media != ide_cdrom && drive->media != ide_optical)
1741  goto failed;
1742 
1743  drive->debug_mask = debug_mask;
1744  drive->irq_handler = cdrom_newpc_intr;
1745 
1746  info = kzalloc(sizeof(struct cdrom_info), GFP_KERNEL);
1747  if (info == NULL) {
1748  printk(KERN_ERR PFX "%s: Can't allocate a cdrom structure\n",
1749  drive->name);
1750  goto failed;
1751  }
1752 
1753  g = alloc_disk(1 << PARTN_BITS);
1754  if (!g)
1755  goto out_free_cd;
1756 
1757  ide_init_disk(g, drive);
1758 
1759  info->dev.parent = &drive->gendev;
1760  info->dev.release = ide_cd_release;
1761  dev_set_name(&info->dev, dev_name(&drive->gendev));
1762 
1763  if (device_register(&info->dev))
1764  goto out_free_disk;
1765 
1766  info->drive = drive;
1767  info->driver = &ide_cdrom_driver;
1768  info->disk = g;
1769 
1770  g->private_data = &info->driver;
1771 
1772  drive->driver_data = info;
1773 
1774  g->minors = 1;
1775  g->driverfs_dev = &drive->gendev;
1776  g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
1777  if (ide_cdrom_setup(drive)) {
1778  put_device(&info->dev);
1779  goto failed;
1780  }
1781 
1782  ide_cd_read_toc(drive, &sense);
1783  g->fops = &idecd_ops;
1784  g->flags |= GENHD_FL_REMOVABLE | GENHD_FL_BLOCK_EVENTS_ON_EXCL_WRITE;
1785  add_disk(g);
1786  return 0;
1787 
1788 out_free_disk:
1789  put_disk(g);
1790 out_free_cd:
1791  kfree(info);
1792 failed:
1793  return -ENODEV;
1794 }
1795 
1796 static void __exit ide_cdrom_exit(void)
1797 {
1798  driver_unregister(&ide_cdrom_driver.gen_driver);
1799 }
1800 
1801 static int __init ide_cdrom_init(void)
1802 {
1803  printk(KERN_INFO DRV_NAME " driver " IDECD_VERSION "\n");
1804  return driver_register(&ide_cdrom_driver.gen_driver);
1805 }
1806 
1807 MODULE_ALIAS("ide:*m-cdrom*");
1808 MODULE_ALIAS("ide-cd");
1809 module_init(ide_cdrom_init);
1810 module_exit(ide_cdrom_exit);
1811 MODULE_LICENSE("GPL");
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