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Automatic merge of rsync://rsync.kernel.org/pub/scm/linux/kernel/git/gregkh/driver...
[linux-2.6/verdex.git] / drivers / cdrom / cdrom.c
blobbeaa561f2ed888ad6780699b4ffb15bdc8796c93
1 /* linux/drivers/cdrom/cdrom.c.
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to activly
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
61 2.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243 -------------------------------------------------------------------------*/
244
245 #define REVISION "Revision: 3.20"
246 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
247
248 /* I use an error-log mask to give fine grain control over the type of
249 messages dumped to the system logs. The available masks include: */
250 #define CD_NOTHING 0x0
251 #define CD_WARNING 0x1
252 #define CD_REG_UNREG 0x2
253 #define CD_DO_IOCTL 0x4
254 #define CD_OPEN 0x8
255 #define CD_CLOSE 0x10
256 #define CD_COUNT_TRACKS 0x20
257 #define CD_CHANGER 0x40
258 #define CD_DVD 0x80
259
260 /* Define this to remove _all_ the debugging messages */
261 /* #define ERRLOGMASK CD_NOTHING */
262 #define ERRLOGMASK CD_WARNING
263 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
264 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
265
266 #include <linux/config.h>
267 #include <linux/module.h>
268 #include <linux/fs.h>
269 #include <linux/buffer_head.h>
270 #include <linux/major.h>
271 #include <linux/types.h>
272 #include <linux/errno.h>
273 #include <linux/kernel.h>
274 #include <linux/mm.h>
275 #include <linux/slab.h>
276 #include <linux/cdrom.h>
277 #include <linux/sysctl.h>
278 #include <linux/proc_fs.h>
279 #include <linux/blkpg.h>
280 #include <linux/init.h>
281 #include <linux/fcntl.h>
282 #include <linux/blkdev.h>
283 #include <linux/times.h>
284
285 #include <asm/uaccess.h>
286
287 /* used to tell the module to turn on full debugging messages */
288 static int debug;
289 /* used to keep tray locked at all times */
290 static int keeplocked;
291 /* default compatibility mode */
292 static int autoclose=1;
293 static int autoeject;
294 static int lockdoor = 1;
295 /* will we ever get to use this... sigh. */
296 static int check_media_type;
297 /* automatically restart mrw format */
298 static int mrw_format_restart = 1;
299 module_param(debug, bool, 0);
300 module_param(autoclose, bool, 0);
301 module_param(autoeject, bool, 0);
302 module_param(lockdoor, bool, 0);
303 module_param(check_media_type, bool, 0);
304 module_param(mrw_format_restart, bool, 0);
305
306 static DEFINE_SPINLOCK(cdrom_lock);
307
308 static const char *mrw_format_status[] = {
309 "not mrw",
310 "bgformat inactive",
311 "bgformat active",
312 "mrw complete",
313 };
314
315 static const char *mrw_address_space[] = { "DMA", "GAA" };
316
317 #if (ERRLOGMASK!=CD_NOTHING)
318 #define cdinfo(type, fmt, args...) \
319 if ((ERRLOGMASK & type) || debug==1 ) \
320 printk(KERN_INFO "cdrom: " fmt, ## args)
321 #else
322 #define cdinfo(type, fmt, args...)
323 #endif
324
325 /* These are used to simplify getting data in from and back to user land */
326 #define IOCTL_IN(arg, type, in) \
327 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \
328 return -EFAULT;
329
330 #define IOCTL_OUT(arg, type, out) \
331 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \
332 return -EFAULT;
333
334 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
335 a lot of places. This macro makes the code more clear. */
336 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
337
338 /* used in the audio ioctls */
339 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret
340
341 /* Not-exported routines. */
342 static int open_for_data(struct cdrom_device_info * cdi);
343 static int check_for_audio_disc(struct cdrom_device_info * cdi,
344 struct cdrom_device_ops * cdo);
345 static void sanitize_format(union cdrom_addr *addr,
346 u_char * curr, u_char requested);
347 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
348 unsigned long arg);
349
350 int cdrom_get_last_written(struct cdrom_device_info *, long *);
351 static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
352 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
353
354 static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
355
356 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
357
358 #ifdef CONFIG_SYSCTL
359 static void cdrom_sysctl_register(void);
360 #endif /* CONFIG_SYSCTL */
361 static struct cdrom_device_info *topCdromPtr;
362
363 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
364 struct packet_command *cgc)
365 {
366 if (cgc->sense) {
367 cgc->sense->sense_key = 0x05;
368 cgc->sense->asc = 0x20;
369 cgc->sense->ascq = 0x00;
370 }
371
372 cgc->stat = -EIO;
373 return -EIO;
374 }
375
376 /* This macro makes sure we don't have to check on cdrom_device_ops
377 * existence in the run-time routines below. Change_capability is a
378 * hack to have the capability flags defined const, while we can still
379 * change it here without gcc complaining at every line.
380 */
381 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
382
383 int register_cdrom(struct cdrom_device_info *cdi)
384 {
385 static char banner_printed;
386 struct cdrom_device_ops *cdo = cdi->ops;
387 int *change_capability = (int *)&cdo->capability; /* hack */
388
389 cdinfo(CD_OPEN, "entering register_cdrom\n");
390
391 if (cdo->open == NULL || cdo->release == NULL)
392 return -2;
393 if (!banner_printed) {
394 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
395 banner_printed = 1;
396 #ifdef CONFIG_SYSCTL
397 cdrom_sysctl_register();
398 #endif /* CONFIG_SYSCTL */
399 }
400
401 ENSURE(drive_status, CDC_DRIVE_STATUS );
402 ENSURE(media_changed, CDC_MEDIA_CHANGED);
403 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
404 ENSURE(lock_door, CDC_LOCK);
405 ENSURE(select_speed, CDC_SELECT_SPEED);
406 ENSURE(get_last_session, CDC_MULTI_SESSION);
407 ENSURE(get_mcn, CDC_MCN);
408 ENSURE(reset, CDC_RESET);
409 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
410 ENSURE(dev_ioctl, CDC_IOCTLS);
411 ENSURE(generic_packet, CDC_GENERIC_PACKET);
412 cdi->mc_flags = 0;
413 cdo->n_minors = 0;
414 cdi->options = CDO_USE_FFLAGS;
415
416 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
417 cdi->options |= (int) CDO_AUTO_CLOSE;
418 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
419 cdi->options |= (int) CDO_AUTO_EJECT;
420 if (lockdoor==1)
421 cdi->options |= (int) CDO_LOCK;
422 if (check_media_type==1)
423 cdi->options |= (int) CDO_CHECK_TYPE;
424
425 if (CDROM_CAN(CDC_MRW_W))
426 cdi->exit = cdrom_mrw_exit;
427
428 if (cdi->disk)
429 cdi->cdda_method = CDDA_BPC_FULL;
430 else
431 cdi->cdda_method = CDDA_OLD;
432
433 if (!cdo->generic_packet)
434 cdo->generic_packet = cdrom_dummy_generic_packet;
435
436 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
437 spin_lock(&cdrom_lock);
438 cdi->next = topCdromPtr;
439 topCdromPtr = cdi;
440 spin_unlock(&cdrom_lock);
441 return 0;
442 }
443 #undef ENSURE
444
445 int unregister_cdrom(struct cdrom_device_info *unreg)
446 {
447 struct cdrom_device_info *cdi, *prev;
448 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
449
450 prev = NULL;
451 spin_lock(&cdrom_lock);
452 cdi = topCdromPtr;
453 while (cdi && cdi != unreg) {
454 prev = cdi;
455 cdi = cdi->next;
456 }
457
458 if (cdi == NULL) {
459 spin_unlock(&cdrom_lock);
460 return -2;
461 }
462 if (prev)
463 prev->next = cdi->next;
464 else
465 topCdromPtr = cdi->next;
466
467 spin_unlock(&cdrom_lock);
468
469 if (cdi->exit)
470 cdi->exit(cdi);
471
472 cdi->ops->n_minors--;
473 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
474 return 0;
475 }
476
477 int cdrom_get_media_event(struct cdrom_device_info *cdi,
478 struct media_event_desc *med)
479 {
480 struct packet_command cgc;
481 unsigned char buffer[8];
482 struct event_header *eh = (struct event_header *) buffer;
483
484 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
485 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
486 cgc.cmd[1] = 1; /* IMMED */
487 cgc.cmd[4] = 1 << 4; /* media event */
488 cgc.cmd[8] = sizeof(buffer);
489 cgc.quiet = 1;
490
491 if (cdi->ops->generic_packet(cdi, &cgc))
492 return 1;
493
494 if (be16_to_cpu(eh->data_len) < sizeof(*med))
495 return 1;
496
497 if (eh->nea || eh->notification_class != 0x4)
498 return 1;
499
500 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
501 return 0;
502 }
503
504 /*
505 * the first prototypes used 0x2c as the page code for the mrw mode page,
506 * subsequently this was changed to 0x03. probe the one used by this drive
507 */
508 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
509 {
510 struct packet_command cgc;
511 char buffer[16];
512
513 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
514
515 cgc.timeout = HZ;
516 cgc.quiet = 1;
517
518 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
519 cdi->mrw_mode_page = MRW_MODE_PC;
520 return 0;
521 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
522 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
523 return 0;
524 }
525
526 return 1;
527 }
528
529 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
530 {
531 struct packet_command cgc;
532 struct mrw_feature_desc *mfd;
533 unsigned char buffer[16];
534 int ret;
535
536 *write = 0;
537
538 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
539
540 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
541 cgc.cmd[3] = CDF_MRW;
542 cgc.cmd[8] = sizeof(buffer);
543 cgc.quiet = 1;
544
545 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
546 return ret;
547
548 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
549 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
550 return 1;
551 *write = mfd->write;
552
553 if ((ret = cdrom_mrw_probe_pc(cdi))) {
554 *write = 0;
555 return ret;
556 }
557
558 return 0;
559 }
560
561 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
562 {
563 struct packet_command cgc;
564 unsigned char buffer[12];
565 int ret;
566
567 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
568
569 /*
570 * FmtData bit set (bit 4), format type is 1
571 */
572 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
573 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
574 cgc.cmd[1] = (1 << 4) | 1;
575
576 cgc.timeout = 5 * 60 * HZ;
577
578 /*
579 * 4 byte format list header, 8 byte format list descriptor
580 */
581 buffer[1] = 1 << 1;
582 buffer[3] = 8;
583
584 /*
585 * nr_blocks field
586 */
587 buffer[4] = 0xff;
588 buffer[5] = 0xff;
589 buffer[6] = 0xff;
590 buffer[7] = 0xff;
591
592 buffer[8] = 0x24 << 2;
593 buffer[11] = cont;
594
595 ret = cdi->ops->generic_packet(cdi, &cgc);
596 if (ret)
597 printk(KERN_INFO "cdrom: bgformat failed\n");
598
599 return ret;
600 }
601
602 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
603 {
604 struct packet_command cgc;
605
606 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
607 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
608
609 /*
610 * Session = 1, Track = 0
611 */
612 cgc.cmd[1] = !!immed;
613 cgc.cmd[2] = 1 << 1;
614
615 cgc.timeout = 5 * 60 * HZ;
616
617 return cdi->ops->generic_packet(cdi, &cgc);
618 }
619
620 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
621 {
622 struct packet_command cgc;
623
624 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
625 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
626
627 cgc.timeout = 5 * 60 * HZ;
628
629 return cdi->ops->generic_packet(cdi, &cgc);
630 }
631
632 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
633 {
634 disc_information di;
635 int ret;
636
637 ret = cdrom_get_disc_info(cdi, &di);
638 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
639 return 1;
640
641 ret = 0;
642 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
643 printk(KERN_INFO "cdrom: issuing MRW back ground "
644 "format suspend\n");
645 ret = cdrom_mrw_bgformat_susp(cdi, 0);
646 }
647
648 if (!ret && cdi->media_written)
649 ret = cdrom_flush_cache(cdi);
650
651 return ret;
652 }
653
654 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
655 {
656 struct packet_command cgc;
657 struct mode_page_header *mph;
658 char buffer[16];
659 int ret, offset, size;
660
661 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
662
663 cgc.buffer = buffer;
664 cgc.buflen = sizeof(buffer);
665
666 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
667 return ret;
668
669 mph = (struct mode_page_header *) buffer;
670 offset = be16_to_cpu(mph->desc_length);
671 size = be16_to_cpu(mph->mode_data_length) + 2;
672
673 buffer[offset + 3] = space;
674 cgc.buflen = size;
675
676 if ((ret = cdrom_mode_select(cdi, &cgc)))
677 return ret;
678
679 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
680 return 0;
681 }
682
683 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
684 struct rwrt_feature_desc *rfd)
685 {
686 struct packet_command cgc;
687 char buffer[24];
688 int ret;
689
690 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
691
692 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
693 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
694 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
695 cgc.quiet = 1;
696
697 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
698 return ret;
699
700 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
701 return 0;
702 }
703
704 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
705 {
706 struct packet_command cgc;
707 char buffer[16];
708 __u16 *feature_code;
709 int ret;
710
711 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
712
713 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
714 cgc.cmd[3] = CDF_HWDM;
715 cgc.cmd[8] = sizeof(buffer);
716 cgc.quiet = 1;
717
718 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
719 return ret;
720
721 feature_code = (__u16 *) &buffer[sizeof(struct feature_header)];
722 if (be16_to_cpu(*feature_code) == CDF_HWDM)
723 return 0;
724
725 return 1;
726 }
727
728
729 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
730 {
731 struct rwrt_feature_desc rfd;
732 int ret;
733
734 *write = 0;
735
736 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
737 return ret;
738
739 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
740 *write = 1;
741
742 return 0;
743 }
744
745 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
746 {
747 disc_information di;
748 int ret;
749
750 ret = cdrom_get_disc_info(cdi, &di);
751 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
752 return -1;
753
754 return di.erasable;
755 }
756
757 /*
758 * FIXME: check RO bit
759 */
760 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
761 {
762 int ret = cdrom_media_erasable(cdi);
763
764 /*
765 * allow writable open if media info read worked and media is
766 * erasable, _or_ if it fails since not all drives support it
767 */
768 if (!ret)
769 return 1;
770
771 return 0;
772 }
773
774 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
775 {
776 disc_information di;
777 int ret;
778
779 /*
780 * always reset to DMA lba space on open
781 */
782 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
783 printk(KERN_ERR "cdrom: failed setting lba address space\n");
784 return 1;
785 }
786
787 ret = cdrom_get_disc_info(cdi, &di);
788 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
789 return 1;
790
791 if (!di.erasable)
792 return 1;
793
794 /*
795 * mrw_status
796 * 0 - not MRW formatted
797 * 1 - MRW bgformat started, but not running or complete
798 * 2 - MRW bgformat in progress
799 * 3 - MRW formatting complete
800 */
801 ret = 0;
802 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
803 mrw_format_status[di.mrw_status]);
804 if (!di.mrw_status)
805 ret = 1;
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
807 mrw_format_restart)
808 ret = cdrom_mrw_bgformat(cdi, 1);
809
810 return ret;
811 }
812
813 static int mo_open_write(struct cdrom_device_info *cdi)
814 {
815 struct packet_command cgc;
816 char buffer[255];
817 int ret;
818
819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
820 cgc.quiet = 1;
821
822 /*
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
825 */
826
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
828 if (ret)
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
830 if (ret) {
831 cgc.buflen = 255;
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 }
834
835 /* drive gave us no info, let the user go ahead */
836 if (ret)
837 return 0;
838
839 return buffer[3] & 0x80;
840 }
841
842 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
843 {
844 struct rwrt_feature_desc rfd;
845 int ret;
846
847 if ((ret = cdrom_has_defect_mgt(cdi)))
848 return ret;
849
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
851 return ret;
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
853 ret = !rfd.curr;
854
855 cdinfo(CD_OPEN, "can open for random write\n");
856 return ret;
857 }
858
859 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
860 {
861 struct packet_command cgc;
862 char buffer[32];
863 int ret, mmc3_profile;
864
865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
866
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
868 cgc.cmd[1] = 0;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
871 cgc.quiet = 1;
872
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
875 else
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
877
878 cdi->mmc3_profile = mmc3_profile;
879 }
880
881 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
882 {
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
886 return 0;
887 default:
888 return 1;
889 }
890 }
891
892 /*
893 * returns 0 for ok to open write, non-0 to disallow
894 */
895 static int cdrom_open_write(struct cdrom_device_info *cdi)
896 {
897 int mrw, mrw_write, ram_write;
898 int ret = 1;
899
900 mrw = 0;
901 if (!cdrom_is_mrw(cdi, &mrw_write))
902 mrw = 1;
903
904 if (CDROM_CAN(CDC_MO_DRIVE))
905 ram_write = 1;
906 else
907 (void) cdrom_is_random_writable(cdi, &ram_write);
908
909 if (mrw)
910 cdi->mask &= ~CDC_MRW;
911 else
912 cdi->mask |= CDC_MRW;
913
914 if (mrw_write)
915 cdi->mask &= ~CDC_MRW_W;
916 else
917 cdi->mask |= CDC_MRW_W;
918
919 if (ram_write)
920 cdi->mask &= ~CDC_RAM;
921 else
922 cdi->mask |= CDC_RAM;
923
924 if (CDROM_CAN(CDC_MRW_W))
925 ret = cdrom_mrw_open_write(cdi);
926 else if (CDROM_CAN(CDC_DVD_RAM))
927 ret = cdrom_dvdram_open_write(cdi);
928 else if (CDROM_CAN(CDC_RAM) &&
929 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
930 ret = cdrom_ram_open_write(cdi);
931 else if (CDROM_CAN(CDC_MO_DRIVE))
932 ret = mo_open_write(cdi);
933 else if (!cdrom_is_dvd_rw(cdi))
934 ret = 0;
935
936 return ret;
937 }
938
939 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
940 {
941 struct packet_command cgc;
942
943 if (cdi->mmc3_profile != 0x1a) {
944 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
945 return;
946 }
947
948 if (!cdi->media_written) {
949 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
950 return;
951 }
952
953 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
954 cdi->name);
955
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
958 cgc.timeout = 30*HZ;
959 cdi->ops->generic_packet(cdi, &cgc);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
964 cgc.quiet = 1;
965 cdi->ops->generic_packet(cdi, &cgc);
966
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
970 cgc.quiet = 1;
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
973
974 cdi->media_written = 0;
975 }
976
977 static int cdrom_close_write(struct cdrom_device_info *cdi)
978 {
979 #if 0
980 return cdrom_flush_cache(cdi);
981 #else
982 return 0;
983 #endif
984 }
985
986 /* We use the open-option O_NONBLOCK to indicate that the
987 * purpose of opening is only for subsequent ioctl() calls; no device
988 * integrity checks are performed.
989 *
990 * We hope that all cd-player programs will adopt this convention. It
991 * is in their own interest: device control becomes a lot easier
992 * this way.
993 */
994 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
995 {
996 int ret;
997
998 cdinfo(CD_OPEN, "entering cdrom_open\n");
999
1000 /* if this was a O_NONBLOCK open and we should honor the flags,
1001 * do a quick open without drive/disc integrity checks. */
1002 cdi->use_count++;
1003 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
1004 ret = cdi->ops->open(cdi, 1);
1005 } else {
1006 ret = open_for_data(cdi);
1007 if (ret)
1008 goto err;
1009 cdrom_mmc3_profile(cdi);
1010 if (fp->f_mode & FMODE_WRITE) {
1011 ret = -EROFS;
1012 if (cdrom_open_write(cdi))
1013 goto err;
1014 if (!CDROM_CAN(CDC_RAM))
1015 goto err;
1016 ret = 0;
1017 cdi->media_written = 0;
1018 }
1019 }
1020
1021 if (ret)
1022 goto err;
1023
1024 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1025 cdi->name, cdi->use_count);
1026 /* Do this on open. Don't wait for mount, because they might
1027 not be mounting, but opening with O_NONBLOCK */
1028 check_disk_change(ip->i_bdev);
1029 return 0;
1030 err:
1031 cdi->use_count--;
1032 return ret;
1033 }
1034
1035 static
1036 int open_for_data(struct cdrom_device_info * cdi)
1037 {
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cdinfo(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cdinfo(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cdinfo(CD_OPEN, "trying to close the tray.\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cdinfo(CD_OPEN, "the tray is now closed.\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cdinfo(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1099 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)current->pid);
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1106 }
1107 }
1108
1109 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cdinfo(CD_OPEN, "open device failed.\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cdinfo(CD_OPEN, "door locked.\n");
1124 }
1125 cdinfo(CD_OPEN, "device opened successfully.\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133 clean_up_and_return:
1134 cdinfo(CD_WARNING, "open failed.\n");
1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cdinfo(CD_OPEN, "door unlocked.\n");
1138 }
1139 return ret;
1140 }
1141
1142 /* This code is similar to that in open_for_data. The routine is called
1143 whenever an audio play operation is requested.
1144 */
1145 int check_for_audio_disc(struct cdrom_device_info * cdi,
1146 struct cdrom_device_ops * cdo)
1147 {
1148 int ret;
1149 tracktype tracks;
1150 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1151 if (!(cdi->options & CDO_CHECK_TYPE))
1152 return 0;
1153 if (cdo->drive_status != NULL) {
1154 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1155 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1156 if (ret == CDS_TRAY_OPEN) {
1157 cdinfo(CD_OPEN, "the tray is open...\n");
1158 /* can/may i close it? */
1159 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1160 cdi->options & CDO_AUTO_CLOSE) {
1161 cdinfo(CD_OPEN, "trying to close the tray.\n");
1162 ret=cdo->tray_move(cdi,0);
1163 if (ret) {
1164 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1165 /* Ignore the error from the low
1166 level driver. We don't care why it
1167 couldn't close the tray. We only care
1168 that there is no disc in the drive,
1169 since that is the _REAL_ problem here.*/
1170 return -ENOMEDIUM;
1171 }
1172 } else {
1173 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1174 return -ENOMEDIUM;
1175 }
1176 /* Ok, the door should be closed now.. Check again */
1177 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1178 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1179 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1180 return -ENOMEDIUM;
1181 }
1182 if (ret!=CDS_DISC_OK) {
1183 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1184 return -EIO;
1185 }
1186 cdinfo(CD_OPEN, "the tray is now closed.\n");
1187 }
1188 }
1189 cdrom_count_tracks(cdi, &tracks);
1190 if (tracks.error)
1191 return(tracks.error);
1192
1193 if (tracks.audio==0)
1194 return -EMEDIUMTYPE;
1195
1196 return 0;
1197 }
1198
1199 /* Admittedly, the logic below could be performed in a nicer way. */
1200 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1201 {
1202 struct cdrom_device_ops *cdo = cdi->ops;
1203 int opened_for_data;
1204
1205 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1206
1207 if (cdi->use_count > 0)
1208 cdi->use_count--;
1209 if (cdi->use_count == 0)
1210 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1211 if (cdi->use_count == 0)
1212 cdrom_dvd_rw_close_write(cdi);
1213 if (cdi->use_count == 0 &&
1214 (cdo->capability & CDC_LOCK) && !keeplocked) {
1215 cdinfo(CD_CLOSE, "Unlocking door!\n");
1216 cdo->lock_door(cdi, 0);
1217 }
1218 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1219 !(fp && fp->f_flags & O_NONBLOCK);
1220
1221 /*
1222 * flush cache on last write release
1223 */
1224 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1225 cdrom_close_write(cdi);
1226
1227 cdo->release(cdi);
1228 if (cdi->use_count == 0) { /* last process that closes dev*/
1229 if (opened_for_data &&
1230 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1231 cdo->tray_move(cdi, 1);
1232 }
1233 return 0;
1234 }
1235
1236 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1237 struct cdrom_changer_info *buf)
1238 {
1239 struct packet_command cgc;
1240 struct cdrom_device_ops *cdo = cdi->ops;
1241 int length;
1242
1243 /*
1244 * Sanyo changer isn't spec compliant (doesn't use regular change
1245 * LOAD_UNLOAD command, and it doesn't implement the mech status
1246 * command below
1247 */
1248 if (cdi->sanyo_slot) {
1249 buf->hdr.nslots = 3;
1250 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1251 for (length = 0; length < 3; length++) {
1252 buf->slots[length].disc_present = 1;
1253 buf->slots[length].change = 0;
1254 }
1255 return 0;
1256 }
1257
1258 length = sizeof(struct cdrom_mechstat_header) +
1259 cdi->capacity * sizeof(struct cdrom_slot);
1260
1261 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1262 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1263 cgc.cmd[8] = (length >> 8) & 0xff;
1264 cgc.cmd[9] = length & 0xff;
1265 return cdo->generic_packet(cdi, &cgc);
1266 }
1267
1268 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1269 {
1270 struct cdrom_changer_info *info;
1271 int ret;
1272
1273 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1274 if (cdi->sanyo_slot)
1275 return CDS_NO_INFO;
1276
1277 info = kmalloc(sizeof(*info), GFP_KERNEL);
1278 if (!info)
1279 return -ENOMEM;
1280
1281 if ((ret = cdrom_read_mech_status(cdi, info)))
1282 goto out_free;
1283
1284 if (info->slots[slot].disc_present)
1285 ret = CDS_DISC_OK;
1286 else
1287 ret = CDS_NO_DISC;
1288
1289 out_free:
1290 kfree(info);
1291 return ret;
1292 }
1293
1294 /* Return the number of slots for an ATAPI/SCSI cdrom,
1295 * return 1 if not a changer.
1296 */
1297 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1298 {
1299 int status;
1300 int nslots = 1;
1301 struct cdrom_changer_info *info;
1302
1303 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1304 /* cdrom_read_mech_status requires a valid value for capacity: */
1305 cdi->capacity = 0;
1306
1307 info = kmalloc(sizeof(*info), GFP_KERNEL);
1308 if (!info)
1309 return -ENOMEM;
1310
1311 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1312 nslots = info->hdr.nslots;
1313
1314 kfree(info);
1315 return nslots;
1316 }
1317
1318
1319 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1320 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1321 {
1322 struct packet_command cgc;
1323
1324 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1325 if (cdi->sanyo_slot && slot < 0)
1326 return 0;
1327
1328 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1329 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1330 cgc.cmd[4] = 2 + (slot >= 0);
1331 cgc.cmd[8] = slot;
1332 cgc.timeout = 60 * HZ;
1333
1334 /* The Sanyo 3 CD changer uses byte 7 of the
1335 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1336 using the GPCMD_LOAD_UNLOAD opcode. */
1337 if (cdi->sanyo_slot && -1 < slot) {
1338 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1339 cgc.cmd[7] = slot;
1340 cgc.cmd[4] = cgc.cmd[8] = 0;
1341 cdi->sanyo_slot = slot ? slot : 3;
1342 }
1343
1344 return cdi->ops->generic_packet(cdi, &cgc);
1345 }
1346
1347 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1348 {
1349 struct cdrom_changer_info *info;
1350 int curslot;
1351 int ret;
1352
1353 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1354 if (!CDROM_CAN(CDC_SELECT_DISC))
1355 return -EDRIVE_CANT_DO_THIS;
1356
1357 (void) cdi->ops->media_changed(cdi, slot);
1358
1359 if (slot == CDSL_NONE) {
1360 /* set media changed bits, on both queues */
1361 cdi->mc_flags = 0x3;
1362 return cdrom_load_unload(cdi, -1);
1363 }
1364
1365 info = kmalloc(sizeof(*info), GFP_KERNEL);
1366 if (!info)
1367 return -ENOMEM;
1368
1369 if ((ret = cdrom_read_mech_status(cdi, info))) {
1370 kfree(info);
1371 return ret;
1372 }
1373
1374 curslot = info->hdr.curslot;
1375 kfree(info);
1376
1377 if (cdi->use_count > 1 || keeplocked) {
1378 if (slot == CDSL_CURRENT) {
1379 return curslot;
1380 } else {
1381 return -EBUSY;
1382 }
1383 }
1384
1385 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1386 which is useful if it had been previously unloaded.
1387 Whether it can or not, it returns the current slot.
1388 Similarly, if slot happens to be the current one, we still
1389 try and load it. */
1390 if (slot == CDSL_CURRENT)
1391 slot = curslot;
1392
1393 /* set media changed bits on both queues */
1394 cdi->mc_flags = 0x3;
1395 if ((ret = cdrom_load_unload(cdi, slot)))
1396 return ret;
1397
1398 return slot;
1399 }
1400
1401 /* We want to make media_changed accessible to the user through an
1402 * ioctl. The main problem now is that we must double-buffer the
1403 * low-level implementation, to assure that the VFS and the user both
1404 * see a medium change once.
1405 */
1406
1407 static
1408 int media_changed(struct cdrom_device_info *cdi, int queue)
1409 {
1410 unsigned int mask = (1 << (queue & 1));
1411 int ret = !!(cdi->mc_flags & mask);
1412
1413 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1414 return ret;
1415 /* changed since last call? */
1416 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1417 cdi->mc_flags = 0x3; /* set bit on both queues */
1418 ret |= 1;
1419 cdi->media_written = 0;
1420 }
1421 cdi->mc_flags &= ~mask; /* clear bit */
1422 return ret;
1423 }
1424
1425 int cdrom_media_changed(struct cdrom_device_info *cdi)
1426 {
1427 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1428 * Returning "0" is always safe (media hasn't been changed). Do that
1429 * if the low-level cdrom driver dosn't support media changed. */
1430 if (cdi == NULL || cdi->ops->media_changed == NULL)
1431 return 0;
1432 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1433 return 0;
1434 return media_changed(cdi, 0);
1435 }
1436
1437 /* badly broken, I know. Is due for a fixup anytime. */
1438 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1439 {
1440 struct cdrom_tochdr header;
1441 struct cdrom_tocentry entry;
1442 int ret, i;
1443 tracks->data=0;
1444 tracks->audio=0;
1445 tracks->cdi=0;
1446 tracks->xa=0;
1447 tracks->error=0;
1448 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1449 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 /* Grab the TOC header so we can see how many tracks there are */
1454 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1455 if (ret == -ENOMEDIUM)
1456 tracks->error = CDS_NO_DISC;
1457 else
1458 tracks->error = CDS_NO_INFO;
1459 return;
1460 }
1461 /* check what type of tracks are on this disc */
1462 entry.cdte_format = CDROM_MSF;
1463 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1464 entry.cdte_track = i;
1465 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1466 tracks->error=CDS_NO_INFO;
1467 return;
1468 }
1469 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1470 if (entry.cdte_format == 0x10)
1471 tracks->cdi++;
1472 else if (entry.cdte_format == 0x20)
1473 tracks->xa++;
1474 else
1475 tracks->data++;
1476 } else
1477 tracks->audio++;
1478 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1479 i, entry.cdte_format, entry.cdte_ctrl);
1480 }
1481 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1482 header.cdth_trk1, tracks->audio, tracks->data,
1483 tracks->cdi, tracks->xa);
1484 }
1485
1486 /* Requests to the low-level drivers will /always/ be done in the
1487 following format convention:
1488
1489 CDROM_LBA: all data-related requests.
1490 CDROM_MSF: all audio-related requests.
1491
1492 However, a low-level implementation is allowed to refuse this
1493 request, and return information in its own favorite format.
1494
1495 It doesn't make sense /at all/ to ask for a play_audio in LBA
1496 format, or ask for multi-session info in MSF format. However, for
1497 backward compatibility these format requests will be satisfied, but
1498 the requests to the low-level drivers will be sanitized in the more
1499 meaningful format indicated above.
1500 */
1501
1502 static
1503 void sanitize_format(union cdrom_addr *addr,
1504 u_char * curr, u_char requested)
1505 {
1506 if (*curr == requested)
1507 return; /* nothing to be done! */
1508 if (requested == CDROM_LBA) {
1509 addr->lba = (int) addr->msf.frame +
1510 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1511 } else { /* CDROM_MSF */
1512 int lba = addr->lba;
1513 addr->msf.frame = lba % 75;
1514 lba /= 75;
1515 lba += 2;
1516 addr->msf.second = lba % 60;
1517 addr->msf.minute = lba / 60;
1518 }
1519 *curr = requested;
1520 }
1521
1522 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1523 int type)
1524 {
1525 memset(cgc, 0, sizeof(struct packet_command));
1526 if (buf)
1527 memset(buf, 0, len);
1528 cgc->buffer = (char *) buf;
1529 cgc->buflen = len;
1530 cgc->data_direction = type;
1531 cgc->timeout = 5*HZ;
1532 }
1533
1534 /* DVD handling */
1535
1536 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1537 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1538
1539 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1540 {
1541 cgc->cmd[0] = GPCMD_REPORT_KEY;
1542 cgc->cmd[10] = type | (agid << 6);
1543 switch (type) {
1544 case 0: case 8: case 5: {
1545 cgc->buflen = 8;
1546 break;
1547 }
1548 case 1: {
1549 cgc->buflen = 16;
1550 break;
1551 }
1552 case 2: case 4: {
1553 cgc->buflen = 12;
1554 break;
1555 }
1556 }
1557 cgc->cmd[9] = cgc->buflen;
1558 cgc->data_direction = CGC_DATA_READ;
1559 }
1560
1561 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1562 {
1563 cgc->cmd[0] = GPCMD_SEND_KEY;
1564 cgc->cmd[10] = type | (agid << 6);
1565 switch (type) {
1566 case 1: {
1567 cgc->buflen = 16;
1568 break;
1569 }
1570 case 3: {
1571 cgc->buflen = 12;
1572 break;
1573 }
1574 case 6: {
1575 cgc->buflen = 8;
1576 break;
1577 }
1578 }
1579 cgc->cmd[9] = cgc->buflen;
1580 cgc->data_direction = CGC_DATA_WRITE;
1581 }
1582
1583 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1584 {
1585 int ret;
1586 u_char buf[20];
1587 struct packet_command cgc;
1588 struct cdrom_device_ops *cdo = cdi->ops;
1589 rpc_state_t rpc_state;
1590
1591 memset(buf, 0, sizeof(buf));
1592 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1593
1594 switch (ai->type) {
1595 /* LU data send */
1596 case DVD_LU_SEND_AGID:
1597 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1598 cgc.quiet = 1;
1599 setup_report_key(&cgc, ai->lsa.agid, 0);
1600
1601 if ((ret = cdo->generic_packet(cdi, &cgc)))
1602 return ret;
1603
1604 ai->lsa.agid = buf[7] >> 6;
1605 /* Returning data, let host change state */
1606 break;
1607
1608 case DVD_LU_SEND_KEY1:
1609 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1610 setup_report_key(&cgc, ai->lsk.agid, 2);
1611
1612 if ((ret = cdo->generic_packet(cdi, &cgc)))
1613 return ret;
1614
1615 copy_key(ai->lsk.key, &buf[4]);
1616 /* Returning data, let host change state */
1617 break;
1618
1619 case DVD_LU_SEND_CHALLENGE:
1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1621 setup_report_key(&cgc, ai->lsc.agid, 1);
1622
1623 if ((ret = cdo->generic_packet(cdi, &cgc)))
1624 return ret;
1625
1626 copy_chal(ai->lsc.chal, &buf[4]);
1627 /* Returning data, let host change state */
1628 break;
1629
1630 /* Post-auth key */
1631 case DVD_LU_SEND_TITLE_KEY:
1632 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1633 cgc.quiet = 1;
1634 setup_report_key(&cgc, ai->lstk.agid, 4);
1635 cgc.cmd[5] = ai->lstk.lba;
1636 cgc.cmd[4] = ai->lstk.lba >> 8;
1637 cgc.cmd[3] = ai->lstk.lba >> 16;
1638 cgc.cmd[2] = ai->lstk.lba >> 24;
1639
1640 if ((ret = cdo->generic_packet(cdi, &cgc)))
1641 return ret;
1642
1643 ai->lstk.cpm = (buf[4] >> 7) & 1;
1644 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1645 ai->lstk.cgms = (buf[4] >> 4) & 3;
1646 copy_key(ai->lstk.title_key, &buf[5]);
1647 /* Returning data, let host change state */
1648 break;
1649
1650 case DVD_LU_SEND_ASF:
1651 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1652 setup_report_key(&cgc, ai->lsasf.agid, 5);
1653
1654 if ((ret = cdo->generic_packet(cdi, &cgc)))
1655 return ret;
1656
1657 ai->lsasf.asf = buf[7] & 1;
1658 break;
1659
1660 /* LU data receive (LU changes state) */
1661 case DVD_HOST_SEND_CHALLENGE:
1662 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1663 setup_send_key(&cgc, ai->hsc.agid, 1);
1664 buf[1] = 0xe;
1665 copy_chal(&buf[4], ai->hsc.chal);
1666
1667 if ((ret = cdo->generic_packet(cdi, &cgc)))
1668 return ret;
1669
1670 ai->type = DVD_LU_SEND_KEY1;
1671 break;
1672
1673 case DVD_HOST_SEND_KEY2:
1674 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1675 setup_send_key(&cgc, ai->hsk.agid, 3);
1676 buf[1] = 0xa;
1677 copy_key(&buf[4], ai->hsk.key);
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1680 ai->type = DVD_AUTH_FAILURE;
1681 return ret;
1682 }
1683 ai->type = DVD_AUTH_ESTABLISHED;
1684 break;
1685
1686 /* Misc */
1687 case DVD_INVALIDATE_AGID:
1688 cgc.quiet = 1;
1689 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1690 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1691 if ((ret = cdo->generic_packet(cdi, &cgc)))
1692 return ret;
1693 break;
1694
1695 /* Get region settings */
1696 case DVD_LU_SEND_RPC_STATE:
1697 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1698 setup_report_key(&cgc, 0, 8);
1699 memset(&rpc_state, 0, sizeof(rpc_state_t));
1700 cgc.buffer = (char *) &rpc_state;
1701
1702 if ((ret = cdo->generic_packet(cdi, &cgc)))
1703 return ret;
1704
1705 ai->lrpcs.type = rpc_state.type_code;
1706 ai->lrpcs.vra = rpc_state.vra;
1707 ai->lrpcs.ucca = rpc_state.ucca;
1708 ai->lrpcs.region_mask = rpc_state.region_mask;
1709 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1710 break;
1711
1712 /* Set region settings */
1713 case DVD_HOST_SEND_RPC_STATE:
1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1715 setup_send_key(&cgc, 0, 6);
1716 buf[1] = 6;
1717 buf[4] = ai->hrpcs.pdrc;
1718
1719 if ((ret = cdo->generic_packet(cdi, &cgc)))
1720 return ret;
1721 break;
1722
1723 default:
1724 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1725 return -ENOTTY;
1726 }
1727
1728 return 0;
1729 }
1730
1731 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1732 {
1733 unsigned char buf[21], *base;
1734 struct dvd_layer *layer;
1735 struct packet_command cgc;
1736 struct cdrom_device_ops *cdo = cdi->ops;
1737 int ret, layer_num = s->physical.layer_num;
1738
1739 if (layer_num >= DVD_LAYERS)
1740 return -EINVAL;
1741
1742 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1743 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1744 cgc.cmd[6] = layer_num;
1745 cgc.cmd[7] = s->type;
1746 cgc.cmd[9] = cgc.buflen & 0xff;
1747
1748 /*
1749 * refrain from reporting errors on non-existing layers (mainly)
1750 */
1751 cgc.quiet = 1;
1752
1753 if ((ret = cdo->generic_packet(cdi, &cgc)))
1754 return ret;
1755
1756 base = &buf[4];
1757 layer = &s->physical.layer[layer_num];
1758
1759 /*
1760 * place the data... really ugly, but at least we won't have to
1761 * worry about endianess in userspace.
1762 */
1763 memset(layer, 0, sizeof(*layer));
1764 layer->book_version = base[0] & 0xf;
1765 layer->book_type = base[0] >> 4;
1766 layer->min_rate = base[1] & 0xf;
1767 layer->disc_size = base[1] >> 4;
1768 layer->layer_type = base[2] & 0xf;
1769 layer->track_path = (base[2] >> 4) & 1;
1770 layer->nlayers = (base[2] >> 5) & 3;
1771 layer->track_density = base[3] & 0xf;
1772 layer->linear_density = base[3] >> 4;
1773 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1774 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1775 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1776 layer->bca = base[16] >> 7;
1777
1778 return 0;
1779 }
1780
1781 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1782 {
1783 int ret;
1784 u_char buf[8];
1785 struct packet_command cgc;
1786 struct cdrom_device_ops *cdo = cdi->ops;
1787
1788 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1789 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1790 cgc.cmd[6] = s->copyright.layer_num;
1791 cgc.cmd[7] = s->type;
1792 cgc.cmd[8] = cgc.buflen >> 8;
1793 cgc.cmd[9] = cgc.buflen & 0xff;
1794
1795 if ((ret = cdo->generic_packet(cdi, &cgc)))
1796 return ret;
1797
1798 s->copyright.cpst = buf[4];
1799 s->copyright.rmi = buf[5];
1800
1801 return 0;
1802 }
1803
1804 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1805 {
1806 int ret, size;
1807 u_char *buf;
1808 struct packet_command cgc;
1809 struct cdrom_device_ops *cdo = cdi->ops;
1810
1811 size = sizeof(s->disckey.value) + 4;
1812
1813 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
1814 return -ENOMEM;
1815
1816 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1817 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1818 cgc.cmd[7] = s->type;
1819 cgc.cmd[8] = size >> 8;
1820 cgc.cmd[9] = size & 0xff;
1821 cgc.cmd[10] = s->disckey.agid << 6;
1822
1823 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1824 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1825
1826 kfree(buf);
1827 return ret;
1828 }
1829
1830 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1831 {
1832 int ret;
1833 u_char buf[4 + 188];
1834 struct packet_command cgc;
1835 struct cdrom_device_ops *cdo = cdi->ops;
1836
1837 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1838 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1839 cgc.cmd[7] = s->type;
1840 cgc.cmd[9] = cgc.buflen = 0xff;
1841
1842 if ((ret = cdo->generic_packet(cdi, &cgc)))
1843 return ret;
1844
1845 s->bca.len = buf[0] << 8 | buf[1];
1846 if (s->bca.len < 12 || s->bca.len > 188) {
1847 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1848 return -EIO;
1849 }
1850 memcpy(s->bca.value, &buf[4], s->bca.len);
1851
1852 return 0;
1853 }
1854
1855 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1856 {
1857 int ret = 0, size;
1858 u_char *buf;
1859 struct packet_command cgc;
1860 struct cdrom_device_ops *cdo = cdi->ops;
1861
1862 size = sizeof(s->manufact.value) + 4;
1863
1864 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
1865 return -ENOMEM;
1866
1867 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1868 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1869 cgc.cmd[7] = s->type;
1870 cgc.cmd[8] = size >> 8;
1871 cgc.cmd[9] = size & 0xff;
1872
1873 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1874 kfree(buf);
1875 return ret;
1876 }
1877
1878 s->manufact.len = buf[0] << 8 | buf[1];
1879 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1880 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1881 " (%d)\n", s->manufact.len);
1882 ret = -EIO;
1883 } else {
1884 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1885 }
1886
1887 kfree(buf);
1888 return ret;
1889 }
1890
1891 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1892 {
1893 switch (s->type) {
1894 case DVD_STRUCT_PHYSICAL:
1895 return dvd_read_physical(cdi, s);
1896
1897 case DVD_STRUCT_COPYRIGHT:
1898 return dvd_read_copyright(cdi, s);
1899
1900 case DVD_STRUCT_DISCKEY:
1901 return dvd_read_disckey(cdi, s);
1902
1903 case DVD_STRUCT_BCA:
1904 return dvd_read_bca(cdi, s);
1905
1906 case DVD_STRUCT_MANUFACT:
1907 return dvd_read_manufact(cdi, s);
1908
1909 default:
1910 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1911 s->type);
1912 return -EINVAL;
1913 }
1914 }
1915
1916 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1917 struct packet_command *cgc,
1918 int page_code, int page_control)
1919 {
1920 struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1923
1924 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1925 cgc->cmd[2] = page_code | (page_control << 6);
1926 cgc->cmd[7] = cgc->buflen >> 8;
1927 cgc->cmd[8] = cgc->buflen & 0xff;
1928 cgc->data_direction = CGC_DATA_READ;
1929 return cdo->generic_packet(cdi, cgc);
1930 }
1931
1932 int cdrom_mode_select(struct cdrom_device_info *cdi,
1933 struct packet_command *cgc)
1934 {
1935 struct cdrom_device_ops *cdo = cdi->ops;
1936
1937 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1938 memset(cgc->buffer, 0, 2);
1939 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1940 cgc->cmd[1] = 0x10; /* PF */
1941 cgc->cmd[7] = cgc->buflen >> 8;
1942 cgc->cmd[8] = cgc->buflen & 0xff;
1943 cgc->data_direction = CGC_DATA_WRITE;
1944 return cdo->generic_packet(cdi, cgc);
1945 }
1946
1947 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1948 struct cdrom_subchnl *subchnl, int mcn)
1949 {
1950 struct cdrom_device_ops *cdo = cdi->ops;
1951 struct packet_command cgc;
1952 char buffer[32];
1953 int ret;
1954
1955 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1956 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1957 cgc.cmd[1] = 2; /* MSF addressing */
1958 cgc.cmd[2] = 0x40; /* request subQ data */
1959 cgc.cmd[3] = mcn ? 2 : 1;
1960 cgc.cmd[8] = 16;
1961
1962 if ((ret = cdo->generic_packet(cdi, &cgc)))
1963 return ret;
1964
1965 subchnl->cdsc_audiostatus = cgc.buffer[1];
1966 subchnl->cdsc_format = CDROM_MSF;
1967 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1968 subchnl->cdsc_trk = cgc.buffer[6];
1969 subchnl->cdsc_ind = cgc.buffer[7];
1970
1971 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1972 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1973 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1974 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1975 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1976 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1977
1978 return 0;
1979 }
1980
1981 /*
1982 * Specific READ_10 interface
1983 */
1984 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1985 struct packet_command *cgc, int lba,
1986 int blocksize, int nblocks)
1987 {
1988 struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1991 cgc->cmd[0] = GPCMD_READ_10;
1992 cgc->cmd[2] = (lba >> 24) & 0xff;
1993 cgc->cmd[3] = (lba >> 16) & 0xff;
1994 cgc->cmd[4] = (lba >> 8) & 0xff;
1995 cgc->cmd[5] = lba & 0xff;
1996 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1997 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1998 cgc->cmd[8] = nblocks & 0xff;
1999 cgc->buflen = blocksize * nblocks;
2000 return cdo->generic_packet(cdi, cgc);
2001 }
2002
2003 /* very generic interface for reading the various types of blocks */
2004 static int cdrom_read_block(struct cdrom_device_info *cdi,
2005 struct packet_command *cgc,
2006 int lba, int nblocks, int format, int blksize)
2007 {
2008 struct cdrom_device_ops *cdo = cdi->ops;
2009
2010 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2011 cgc->cmd[0] = GPCMD_READ_CD;
2012 /* expected sector size - cdda,mode1,etc. */
2013 cgc->cmd[1] = format << 2;
2014 /* starting address */
2015 cgc->cmd[2] = (lba >> 24) & 0xff;
2016 cgc->cmd[3] = (lba >> 16) & 0xff;
2017 cgc->cmd[4] = (lba >> 8) & 0xff;
2018 cgc->cmd[5] = lba & 0xff;
2019 /* number of blocks */
2020 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2021 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2022 cgc->cmd[8] = nblocks & 0xff;
2023 cgc->buflen = blksize * nblocks;
2024
2025 /* set the header info returned */
2026 switch (blksize) {
2027 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2028 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2029 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2030 default : cgc->cmd[9] = 0x10;
2031 }
2032
2033 return cdo->generic_packet(cdi, cgc);
2034 }
2035
2036 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2037 int lba, int nframes)
2038 {
2039 struct packet_command cgc;
2040 int ret = 0;
2041 int nr;
2042
2043 cdi->last_sense = 0;
2044
2045 memset(&cgc, 0, sizeof(cgc));
2046
2047 /*
2048 * start with will ra.nframes size, back down if alloc fails
2049 */
2050 nr = nframes;
2051 do {
2052 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2053 if (cgc.buffer)
2054 break;
2055
2056 nr >>= 1;
2057 } while (nr);
2058
2059 if (!nr)
2060 return -ENOMEM;
2061
2062 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2063 ret = -EFAULT;
2064 goto out;
2065 }
2066
2067 cgc.data_direction = CGC_DATA_READ;
2068 while (nframes > 0) {
2069 if (nr > nframes)
2070 nr = nframes;
2071
2072 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2073 if (ret)
2074 break;
2075 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2076 ret = -EFAULT;
2077 break;
2078 }
2079 ubuf += CD_FRAMESIZE_RAW * nr;
2080 nframes -= nr;
2081 lba += nr;
2082 }
2083 out:
2084 kfree(cgc.buffer);
2085 return ret;
2086 }
2087
2088 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2089 int lba, int nframes)
2090 {
2091 request_queue_t *q = cdi->disk->queue;
2092 struct request *rq;
2093 struct bio *bio;
2094 unsigned int len;
2095 int nr, ret = 0;
2096
2097 if (!q)
2098 return -ENXIO;
2099
2100 cdi->last_sense = 0;
2101
2102 while (nframes) {
2103 nr = nframes;
2104 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2105 nr = 1;
2106 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2107 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2108
2109 len = nr * CD_FRAMESIZE_RAW;
2110
2111 rq = blk_rq_map_user(q, READ, ubuf, len);
2112 if (IS_ERR(rq))
2113 return PTR_ERR(rq);
2114
2115 memset(rq->cmd, 0, sizeof(rq->cmd));
2116 rq->cmd[0] = GPCMD_READ_CD;
2117 rq->cmd[1] = 1 << 2;
2118 rq->cmd[2] = (lba >> 24) & 0xff;
2119 rq->cmd[3] = (lba >> 16) & 0xff;
2120 rq->cmd[4] = (lba >> 8) & 0xff;
2121 rq->cmd[5] = lba & 0xff;
2122 rq->cmd[6] = (nr >> 16) & 0xff;
2123 rq->cmd[7] = (nr >> 8) & 0xff;
2124 rq->cmd[8] = nr & 0xff;
2125 rq->cmd[9] = 0xf8;
2126
2127 rq->cmd_len = 12;
2128 rq->flags |= REQ_BLOCK_PC;
2129 rq->timeout = 60 * HZ;
2130 bio = rq->bio;
2131
2132 if (rq->bio)
2133 blk_queue_bounce(q, &rq->bio);
2134
2135 if (blk_execute_rq(q, cdi->disk, rq)) {
2136 struct request_sense *s = rq->sense;
2137 ret = -EIO;
2138 cdi->last_sense = s->sense_key;
2139 }
2140
2141 if (blk_rq_unmap_user(rq, bio, len))
2142 ret = -EFAULT;
2143
2144 if (ret)
2145 break;
2146
2147 nframes -= nr;
2148 lba += nr;
2149 ubuf += len;
2150 }
2151
2152 return ret;
2153 }
2154
2155 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2156 int lba, int nframes)
2157 {
2158 int ret;
2159
2160 if (cdi->cdda_method == CDDA_OLD)
2161 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2162
2163 retry:
2164 /*
2165 * for anything else than success and io error, we need to retry
2166 */
2167 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2168 if (!ret || ret != -EIO)
2169 return ret;
2170
2171 /*
2172 * I've seen drives get sense 4/8/3 udma crc errors on multi
2173 * frame dma, so drop to single frame dma if we need to
2174 */
2175 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2176 printk("cdrom: dropping to single frame dma\n");
2177 cdi->cdda_method = CDDA_BPC_SINGLE;
2178 goto retry;
2179 }
2180
2181 /*
2182 * so we have an io error of some sort with multi frame dma. if the
2183 * condition wasn't a hardware error
2184 * problems, not for any error
2185 */
2186 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2187 return ret;
2188
2189 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2190 cdi->cdda_method = CDDA_OLD;
2191 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2192 }
2193
2194 /* Just about every imaginable ioctl is supported in the Uniform layer
2195 * these days. ATAPI / SCSI specific code now mainly resides in
2196 * mmc_ioct().
2197 */
2198 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2199 struct inode *ip, unsigned int cmd, unsigned long arg)
2200 {
2201 struct cdrom_device_ops *cdo = cdi->ops;
2202 int ret;
2203
2204 /* Try the generic SCSI command ioctl's first.. */
2205 ret = scsi_cmd_ioctl(file, ip->i_bdev->bd_disk, cmd, (void __user *)arg);
2206 if (ret != -ENOTTY)
2207 return ret;
2208
2209 /* the first few commands do not deal with audio drive_info, but
2210 only with routines in cdrom device operations. */
2211 switch (cmd) {
2212 case CDROMMULTISESSION: {
2213 struct cdrom_multisession ms_info;
2214 u_char requested_format;
2215 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2216 if (!(cdo->capability & CDC_MULTI_SESSION))
2217 return -ENOSYS;
2218 IOCTL_IN(arg, struct cdrom_multisession, ms_info);
2219 requested_format = ms_info.addr_format;
2220 if (!((requested_format == CDROM_MSF) ||
2221 (requested_format == CDROM_LBA)))
2222 return -EINVAL;
2223 ms_info.addr_format = CDROM_LBA;
2224 if ((ret=cdo->get_last_session(cdi, &ms_info)))
2225 return ret;
2226 sanitize_format(&ms_info.addr, &ms_info.addr_format,
2227 requested_format);
2228 IOCTL_OUT(arg, struct cdrom_multisession, ms_info);
2229 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2230 return 0;
2231 }
2232
2233 case CDROMEJECT: {
2234 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2235 if (!CDROM_CAN(CDC_OPEN_TRAY))
2236 return -ENOSYS;
2237 if (cdi->use_count != 1 || keeplocked)
2238 return -EBUSY;
2239 if (CDROM_CAN(CDC_LOCK))
2240 if ((ret=cdo->lock_door(cdi, 0)))
2241 return ret;
2242
2243 return cdo->tray_move(cdi, 1);
2244 }
2245
2246 case CDROMCLOSETRAY: {
2247 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2248 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2249 return -ENOSYS;
2250 return cdo->tray_move(cdi, 0);
2251 }
2252
2253 case CDROMEJECT_SW: {
2254 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2255 if (!CDROM_CAN(CDC_OPEN_TRAY))
2256 return -ENOSYS;
2257 if (keeplocked)
2258 return -EBUSY;
2259 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2260 if (arg)
2261 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2262 return 0;
2263 }
2264
2265 case CDROM_MEDIA_CHANGED: {
2266 struct cdrom_changer_info *info;
2267 int changed;
2268
2269 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2270 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2271 return -ENOSYS;
2272
2273 /* cannot select disc or select current disc */
2274 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2275 return media_changed(cdi, 1);
2276
2277 if ((unsigned int)arg >= cdi->capacity)
2278 return -EINVAL;
2279
2280 info = kmalloc(sizeof(*info), GFP_KERNEL);
2281 if (!info)
2282 return -ENOMEM;
2283
2284 if ((ret = cdrom_read_mech_status(cdi, info))) {
2285 kfree(info);
2286 return ret;
2287 }
2288
2289 changed = info->slots[arg].change;
2290 kfree(info);
2291 return changed;
2292 }
2293
2294 case CDROM_SET_OPTIONS: {
2295 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2296 /* options need to be in sync with capability. too late for
2297 that, so we have to check each one separately... */
2298 switch (arg) {
2299 case CDO_USE_FFLAGS:
2300 case CDO_CHECK_TYPE:
2301 break;
2302 case CDO_LOCK:
2303 if (!CDROM_CAN(CDC_LOCK))
2304 return -ENOSYS;
2305 break;
2306 case 0:
2307 return cdi->options;
2308 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2309 default:
2310 if (!CDROM_CAN(arg))
2311 return -ENOSYS;
2312 }
2313 cdi->options |= (int) arg;
2314 return cdi->options;
2315 }
2316
2317 case CDROM_CLEAR_OPTIONS: {
2318 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2319 cdi->options &= ~(int) arg;
2320 return cdi->options;
2321 }
2322
2323 case CDROM_SELECT_SPEED: {
2324 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2325 if (!CDROM_CAN(CDC_SELECT_SPEED))
2326 return -ENOSYS;
2327 return cdo->select_speed(cdi, arg);
2328 }
2329
2330 case CDROM_SELECT_DISC: {
2331 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2332 if (!CDROM_CAN(CDC_SELECT_DISC))
2333 return -ENOSYS;
2334
2335 if ((arg != CDSL_CURRENT) && (arg != CDSL_NONE))
2336 if ((int)arg >= cdi->capacity)
2337 return -EINVAL;
2338
2339 /* cdo->select_disc is a hook to allow a driver-specific
2340 * way of seleting disc. However, since there is no
2341 * equiv hook for cdrom_slot_status this may not
2342 * actually be useful...
2343 */
2344 if (cdo->select_disc != NULL)
2345 return cdo->select_disc(cdi, arg);
2346
2347 /* no driver specific select_disc(), call our own */
2348 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2349 return cdrom_select_disc(cdi, arg);
2350 }
2351
2352 case CDROMRESET: {
2353 if (!capable(CAP_SYS_ADMIN))
2354 return -EACCES;
2355 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2356 if (!CDROM_CAN(CDC_RESET))
2357 return -ENOSYS;
2358 invalidate_bdev(ip->i_bdev, 0);
2359 return cdo->reset(cdi);
2360 }
2361
2362 case CDROM_LOCKDOOR: {
2363 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2364 if (!CDROM_CAN(CDC_LOCK))
2365 return -EDRIVE_CANT_DO_THIS;
2366 keeplocked = arg ? 1 : 0;
2367 /* don't unlock the door on multiple opens,but allow root
2368 * to do so */
2369 if ((cdi->use_count != 1) && !arg && !capable(CAP_SYS_ADMIN))
2370 return -EBUSY;
2371 return cdo->lock_door(cdi, arg);
2372 }
2373
2374 case CDROM_DEBUG: {
2375 if (!capable(CAP_SYS_ADMIN))
2376 return -EACCES;
2377 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2378 debug = arg ? 1 : 0;
2379 return debug;
2380 }
2381
2382 case CDROM_GET_CAPABILITY: {
2383 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2384 return (cdo->capability & ~cdi->mask);
2385 }
2386
2387 /* The following function is implemented, although very few audio
2388 * discs give Universal Product Code information, which should just be
2389 * the Medium Catalog Number on the box. Note, that the way the code
2390 * is written on the CD is /not/ uniform across all discs!
2391 */
2392 case CDROM_GET_MCN: {
2393 struct cdrom_mcn mcn;
2394 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2395 if (!(cdo->capability & CDC_MCN))
2396 return -ENOSYS;
2397 if ((ret=cdo->get_mcn(cdi, &mcn)))
2398 return ret;
2399 IOCTL_OUT(arg, struct cdrom_mcn, mcn);
2400 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2401 return 0;
2402 }
2403
2404 case CDROM_DRIVE_STATUS: {
2405 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2406 if (!(cdo->capability & CDC_DRIVE_STATUS))
2407 return -ENOSYS;
2408 if (!CDROM_CAN(CDC_SELECT_DISC))
2409 return cdo->drive_status(cdi, CDSL_CURRENT);
2410 if ((arg == CDSL_CURRENT) || (arg == CDSL_NONE))
2411 return cdo->drive_status(cdi, CDSL_CURRENT);
2412 if (((int)arg >= cdi->capacity))
2413 return -EINVAL;
2414 return cdrom_slot_status(cdi, arg);
2415 }
2416
2417 /* Ok, this is where problems start. The current interface for the
2418 CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption
2419 that CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly,
2420 while this is often the case, it is also very common for CDs to
2421 have some tracks with data, and some tracks with audio. Just
2422 because I feel like it, I declare the following to be the best
2423 way to cope. If the CD has ANY data tracks on it, it will be
2424 returned as a data CD. If it has any XA tracks, I will return
2425 it as that. Now I could simplify this interface by combining these
2426 returns with the above, but this more clearly demonstrates
2427 the problem with the current interface. Too bad this wasn't
2428 designed to use bitmasks... -Erik
2429
2430 Well, now we have the option CDS_MIXED: a mixed-type CD.
2431 User level programmers might feel the ioctl is not very useful.
2432 ---david
2433 */
2434 case CDROM_DISC_STATUS: {
2435 tracktype tracks;
2436 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2437 cdrom_count_tracks(cdi, &tracks);
2438 if (tracks.error)
2439 return(tracks.error);
2440
2441 /* Policy mode on */
2442 if (tracks.audio > 0) {
2443 if (tracks.data==0 && tracks.cdi==0 && tracks.xa==0)
2444 return CDS_AUDIO;
2445 else
2446 return CDS_MIXED;
2447 }
2448 if (tracks.cdi > 0) return CDS_XA_2_2;
2449 if (tracks.xa > 0) return CDS_XA_2_1;
2450 if (tracks.data > 0) return CDS_DATA_1;
2451 /* Policy mode off */
2452
2453 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2454 return CDS_NO_INFO;
2455 }
2456
2457 case CDROM_CHANGER_NSLOTS: {
2458 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2459 return cdi->capacity;
2460 }
2461 }
2462
2463 /* use the ioctls that are implemented through the generic_packet()
2464 interface. this may look at bit funny, but if -ENOTTY is
2465 returned that particular ioctl is not implemented and we
2466 let it go through the device specific ones. */
2467 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2468 ret = mmc_ioctl(cdi, cmd, arg);
2469 if (ret != -ENOTTY) {
2470 return ret;
2471 }
2472 }
2473
2474 /* note: most of the cdinfo() calls are commented out here,
2475 because they fill up the sys log when CD players poll
2476 the drive. */
2477 switch (cmd) {
2478 case CDROMSUBCHNL: {
2479 struct cdrom_subchnl q;
2480 u_char requested, back;
2481 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2482 return -ENOSYS;
2483 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2484 IOCTL_IN(arg, struct cdrom_subchnl, q);
2485 requested = q.cdsc_format;
2486 if (!((requested == CDROM_MSF) ||
2487 (requested == CDROM_LBA)))
2488 return -EINVAL;
2489 q.cdsc_format = CDROM_MSF;
2490 if ((ret=cdo->audio_ioctl(cdi, cmd, &q)))
2491 return ret;
2492 back = q.cdsc_format; /* local copy */
2493 sanitize_format(&q.cdsc_absaddr, &back, requested);
2494 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2495 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2496 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2497 return 0;
2498 }
2499 case CDROMREADTOCHDR: {
2500 struct cdrom_tochdr header;
2501 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2502 return -ENOSYS;
2503 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2504 IOCTL_IN(arg, struct cdrom_tochdr, header);
2505 if ((ret=cdo->audio_ioctl(cdi, cmd, &header)))
2506 return ret;
2507 IOCTL_OUT(arg, struct cdrom_tochdr, header);
2508 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2509 return 0;
2510 }
2511 case CDROMREADTOCENTRY: {
2512 struct cdrom_tocentry entry;
2513 u_char requested_format;
2514 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2515 return -ENOSYS;
2516 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2517 IOCTL_IN(arg, struct cdrom_tocentry, entry);
2518 requested_format = entry.cdte_format;
2519 if (!((requested_format == CDROM_MSF) ||
2520 (requested_format == CDROM_LBA)))
2521 return -EINVAL;
2522 /* make interface to low-level uniform */
2523 entry.cdte_format = CDROM_MSF;
2524 if ((ret=cdo->audio_ioctl(cdi, cmd, &entry)))
2525 return ret;
2526 sanitize_format(&entry.cdte_addr,
2527 &entry.cdte_format, requested_format);
2528 IOCTL_OUT(arg, struct cdrom_tocentry, entry);
2529 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2530 return 0;
2531 }
2532 case CDROMPLAYMSF: {
2533 struct cdrom_msf msf;
2534 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2535 return -ENOSYS;
2536 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2537 IOCTL_IN(arg, struct cdrom_msf, msf);
2538 return cdo->audio_ioctl(cdi, cmd, &msf);
2539 }
2540 case CDROMPLAYTRKIND: {
2541 struct cdrom_ti ti;
2542 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2543 return -ENOSYS;
2544 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2545 IOCTL_IN(arg, struct cdrom_ti, ti);
2546 CHECKAUDIO;
2547 return cdo->audio_ioctl(cdi, cmd, &ti);
2548 }
2549 case CDROMVOLCTRL: {
2550 struct cdrom_volctrl volume;
2551 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2552 return -ENOSYS;
2553 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2554 IOCTL_IN(arg, struct cdrom_volctrl, volume);
2555 return cdo->audio_ioctl(cdi, cmd, &volume);
2556 }
2557 case CDROMVOLREAD: {
2558 struct cdrom_volctrl volume;
2559 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2560 return -ENOSYS;
2561 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2562 if ((ret=cdo->audio_ioctl(cdi, cmd, &volume)))
2563 return ret;
2564 IOCTL_OUT(arg, struct cdrom_volctrl, volume);
2565 return 0;
2566 }
2567 case CDROMSTART:
2568 case CDROMSTOP:
2569 case CDROMPAUSE:
2570 case CDROMRESUME: {
2571 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2572 return -ENOSYS;
2573 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2574 CHECKAUDIO;
2575 return cdo->audio_ioctl(cdi, cmd, NULL);
2576 }
2577 } /* switch */
2578
2579 /* do the device specific ioctls */
2580 if (CDROM_CAN(CDC_IOCTLS))
2581 return cdo->dev_ioctl(cdi, cmd, arg);
2582
2583 return -ENOSYS;
2584 }
2585
2586 static inline
2587 int msf_to_lba(char m, char s, char f)
2588 {
2589 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
2590 }
2591
2592 /*
2593 * Required when we need to use READ_10 to issue other than 2048 block
2594 * reads
2595 */
2596 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2597 {
2598 struct cdrom_device_ops *cdo = cdi->ops;
2599 struct packet_command cgc;
2600 struct modesel_head mh;
2601
2602 memset(&mh, 0, sizeof(mh));
2603 mh.block_desc_length = 0x08;
2604 mh.block_length_med = (size >> 8) & 0xff;
2605 mh.block_length_lo = size & 0xff;
2606
2607 memset(&cgc, 0, sizeof(cgc));
2608 cgc.cmd[0] = 0x15;
2609 cgc.cmd[1] = 1 << 4;
2610 cgc.cmd[4] = 12;
2611 cgc.buflen = sizeof(mh);
2612 cgc.buffer = (char *) &mh;
2613 cgc.data_direction = CGC_DATA_WRITE;
2614 mh.block_desc_length = 0x08;
2615 mh.block_length_med = (size >> 8) & 0xff;
2616 mh.block_length_lo = size & 0xff;
2617
2618 return cdo->generic_packet(cdi, &cgc);
2619 }
2620
2621 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2622 unsigned long arg)
2623 {
2624 struct cdrom_device_ops *cdo = cdi->ops;
2625 struct packet_command cgc;
2626 struct request_sense sense;
2627 unsigned char buffer[32];
2628 int ret = 0;
2629
2630 memset(&cgc, 0, sizeof(cgc));
2631
2632 /* build a unified command and queue it through
2633 cdo->generic_packet() */
2634 switch (cmd) {
2635 case CDROMREADRAW:
2636 case CDROMREADMODE1:
2637 case CDROMREADMODE2: {
2638 struct cdrom_msf msf;
2639 int blocksize = 0, format = 0, lba;
2640
2641 switch (cmd) {
2642 case CDROMREADRAW:
2643 blocksize = CD_FRAMESIZE_RAW;
2644 break;
2645 case CDROMREADMODE1:
2646 blocksize = CD_FRAMESIZE;
2647 format = 2;
2648 break;
2649 case CDROMREADMODE2:
2650 blocksize = CD_FRAMESIZE_RAW0;
2651 break;
2652 }
2653 IOCTL_IN(arg, struct cdrom_msf, msf);
2654 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2655 /* FIXME: we need upper bound checking, too!! */
2656 if (lba < 0)
2657 return -EINVAL;
2658 cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL);
2659 if (cgc.buffer == NULL)
2660 return -ENOMEM;
2661 memset(&sense, 0, sizeof(sense));
2662 cgc.sense = &sense;
2663 cgc.data_direction = CGC_DATA_READ;
2664 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2665 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2666 /*
2667 * SCSI-II devices are not required to support
2668 * READ_CD, so let's try switching block size
2669 */
2670 /* FIXME: switch back again... */
2671 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2672 kfree(cgc.buffer);
2673 return ret;
2674 }
2675 cgc.sense = NULL;
2676 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2677 ret |= cdrom_switch_blocksize(cdi, blocksize);
2678 }
2679 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2680 ret = -EFAULT;
2681 kfree(cgc.buffer);
2682 return ret;
2683 }
2684 case CDROMREADAUDIO: {
2685 struct cdrom_read_audio ra;
2686 int lba;
2687
2688 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2689
2690 if (ra.addr_format == CDROM_MSF)
2691 lba = msf_to_lba(ra.addr.msf.minute,
2692 ra.addr.msf.second,
2693 ra.addr.msf.frame);
2694 else if (ra.addr_format == CDROM_LBA)
2695 lba = ra.addr.lba;
2696 else
2697 return -EINVAL;
2698
2699 /* FIXME: we need upper bound checking, too!! */
2700 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2701 return -EINVAL;
2702
2703 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2704 }
2705 case CDROMSUBCHNL: {
2706 struct cdrom_subchnl q;
2707 u_char requested, back;
2708 IOCTL_IN(arg, struct cdrom_subchnl, q);
2709 requested = q.cdsc_format;
2710 if (!((requested == CDROM_MSF) ||
2711 (requested == CDROM_LBA)))
2712 return -EINVAL;
2713 q.cdsc_format = CDROM_MSF;
2714 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2715 return ret;
2716 back = q.cdsc_format; /* local copy */
2717 sanitize_format(&q.cdsc_absaddr, &back, requested);
2718 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2719 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2720 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2721 return 0;
2722 }
2723 case CDROMPLAYMSF: {
2724 struct cdrom_msf msf;
2725 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2726 IOCTL_IN(arg, struct cdrom_msf, msf);
2727 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2728 cgc.cmd[3] = msf.cdmsf_min0;
2729 cgc.cmd[4] = msf.cdmsf_sec0;
2730 cgc.cmd[5] = msf.cdmsf_frame0;
2731 cgc.cmd[6] = msf.cdmsf_min1;
2732 cgc.cmd[7] = msf.cdmsf_sec1;
2733 cgc.cmd[8] = msf.cdmsf_frame1;
2734 cgc.data_direction = CGC_DATA_NONE;
2735 return cdo->generic_packet(cdi, &cgc);
2736 }
2737 case CDROMPLAYBLK: {
2738 struct cdrom_blk blk;
2739 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2740 IOCTL_IN(arg, struct cdrom_blk, blk);
2741 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2742 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2743 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2744 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2745 cgc.cmd[5] = blk.from & 0xff;
2746 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2747 cgc.cmd[8] = blk.len & 0xff;
2748 cgc.data_direction = CGC_DATA_NONE;
2749 return cdo->generic_packet(cdi, &cgc);
2750 }
2751 case CDROMVOLCTRL:
2752 case CDROMVOLREAD: {
2753 struct cdrom_volctrl volctrl;
2754 char mask[sizeof(buffer)];
2755 unsigned short offset;
2756
2757 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2758
2759 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2760
2761 cgc.buffer = buffer;
2762 cgc.buflen = 24;
2763 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2764 return ret;
2765
2766 /* originally the code depended on buffer[1] to determine
2767 how much data is available for transfer. buffer[1] is
2768 unfortunately ambigious and the only reliable way seem
2769 to be to simply skip over the block descriptor... */
2770 offset = 8 + be16_to_cpu(*(unsigned short *)(buffer+6));
2771
2772 if (offset + 16 > sizeof(buffer))
2773 return -E2BIG;
2774
2775 if (offset + 16 > cgc.buflen) {
2776 cgc.buflen = offset+16;
2777 ret = cdrom_mode_sense(cdi, &cgc,
2778 GPMODE_AUDIO_CTL_PAGE, 0);
2779 if (ret)
2780 return ret;
2781 }
2782
2783 /* sanity check */
2784 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2785 buffer[offset+1] < 14)
2786 return -EINVAL;
2787
2788 /* now we have the current volume settings. if it was only
2789 a CDROMVOLREAD, return these values */
2790 if (cmd == CDROMVOLREAD) {
2791 volctrl.channel0 = buffer[offset+9];
2792 volctrl.channel1 = buffer[offset+11];
2793 volctrl.channel2 = buffer[offset+13];
2794 volctrl.channel3 = buffer[offset+15];
2795 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2796 return 0;
2797 }
2798
2799 /* get the volume mask */
2800 cgc.buffer = mask;
2801 if ((ret = cdrom_mode_sense(cdi, &cgc,
2802 GPMODE_AUDIO_CTL_PAGE, 1)))
2803 return ret;
2804
2805 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2806 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2807 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2808 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2809
2810 /* set volume */
2811 cgc.buffer = buffer + offset - 8;
2812 memset(cgc.buffer, 0, 8);
2813 return cdrom_mode_select(cdi, &cgc);
2814 }
2815
2816 case CDROMSTART:
2817 case CDROMSTOP: {
2818 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2819 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2820 cgc.cmd[1] = 1;
2821 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
2822 cgc.data_direction = CGC_DATA_NONE;
2823 return cdo->generic_packet(cdi, &cgc);
2824 }
2825
2826 case CDROMPAUSE:
2827 case CDROMRESUME: {
2828 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
2829 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
2830 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
2831 cgc.data_direction = CGC_DATA_NONE;
2832 return cdo->generic_packet(cdi, &cgc);
2833 }
2834
2835 case DVD_READ_STRUCT: {
2836 dvd_struct *s;
2837 int size = sizeof(dvd_struct);
2838 if (!CDROM_CAN(CDC_DVD))
2839 return -ENOSYS;
2840 if ((s = (dvd_struct *) kmalloc(size, GFP_KERNEL)) == NULL)
2841 return -ENOMEM;
2842 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
2843 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
2844 kfree(s);
2845 return -EFAULT;
2846 }
2847 if ((ret = dvd_read_struct(cdi, s))) {
2848 kfree(s);
2849 return ret;
2850 }
2851 if (copy_to_user((dvd_struct __user *)arg, s, size))
2852 ret = -EFAULT;
2853 kfree(s);
2854 return ret;
2855 }
2856
2857 case DVD_AUTH: {
2858 dvd_authinfo ai;
2859 if (!CDROM_CAN(CDC_DVD))
2860 return -ENOSYS;
2861 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
2862 IOCTL_IN(arg, dvd_authinfo, ai);
2863 if ((ret = dvd_do_auth (cdi, &ai)))
2864 return ret;
2865 IOCTL_OUT(arg, dvd_authinfo, ai);
2866 return 0;
2867 }
2868
2869 case CDROM_NEXT_WRITABLE: {
2870 long next = 0;
2871 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
2872 if ((ret = cdrom_get_next_writable(cdi, &next)))
2873 return ret;
2874 IOCTL_OUT(arg, long, next);
2875 return 0;
2876 }
2877 case CDROM_LAST_WRITTEN: {
2878 long last = 0;
2879 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
2880 if ((ret = cdrom_get_last_written(cdi, &last)))
2881 return ret;
2882 IOCTL_OUT(arg, long, last);
2883 return 0;
2884 }
2885 } /* switch */
2886
2887 return -ENOTTY;
2888 }
2889
2890 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
2891 track_information *ti)
2892 {
2893 struct cdrom_device_ops *cdo = cdi->ops;
2894 struct packet_command cgc;
2895 int ret, buflen;
2896
2897 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2898 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2899 cgc.cmd[1] = type & 3;
2900 cgc.cmd[4] = (track & 0xff00) >> 8;
2901 cgc.cmd[5] = track & 0xff;
2902 cgc.cmd[8] = 8;
2903 cgc.quiet = 1;
2904
2905 if ((ret = cdo->generic_packet(cdi, &cgc)))
2906 return ret;
2907
2908 buflen = be16_to_cpu(ti->track_information_length) +
2909 sizeof(ti->track_information_length);
2910
2911 if (buflen > sizeof(track_information))
2912 buflen = sizeof(track_information);
2913
2914 cgc.cmd[8] = cgc.buflen = buflen;
2915 if ((ret = cdo->generic_packet(cdi, &cgc)))
2916 return ret;
2917
2918 /* return actual fill size */
2919 return buflen;
2920 }
2921
2922 /* requires CD R/RW */
2923 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
2924 {
2925 struct cdrom_device_ops *cdo = cdi->ops;
2926 struct packet_command cgc;
2927 int ret, buflen;
2928
2929 /* set up command and get the disc info */
2930 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
2931 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
2932 cgc.cmd[8] = cgc.buflen = 2;
2933 cgc.quiet = 1;
2934
2935 if ((ret = cdo->generic_packet(cdi, &cgc)))
2936 return ret;
2937
2938 /* not all drives have the same disc_info length, so requeue
2939 * packet with the length the drive tells us it can supply
2940 */
2941 buflen = be16_to_cpu(di->disc_information_length) +
2942 sizeof(di->disc_information_length);
2943
2944 if (buflen > sizeof(disc_information))
2945 buflen = sizeof(disc_information);
2946
2947 cgc.cmd[8] = cgc.buflen = buflen;
2948 if ((ret = cdo->generic_packet(cdi, &cgc)))
2949 return ret;
2950
2951 /* return actual fill size */
2952 return buflen;
2953 }
2954
2955 /* return the last written block on the CD-R media. this is for the udf
2956 file system. */
2957 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2958 {
2959 struct cdrom_tocentry toc;
2960 disc_information di;
2961 track_information ti;
2962 __u32 last_track;
2963 int ret = -1, ti_size;
2964
2965 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2966 goto use_toc;
2967
2968 ret = cdrom_get_disc_info(cdi, &di);
2969 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2970 + sizeof(di.last_track_lsb)))
2971 goto use_toc;
2972
2973 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2974 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2975 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2976 if (ti_size < (int)offsetof(typeof(ti), track_start))
2977 goto use_toc;
2978
2979 /* if this track is blank, try the previous. */
2980 if (ti.blank) {
2981 if (last_track==1)
2982 goto use_toc;
2983 last_track--;
2984 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2985 }
2986
2987 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2988 + sizeof(ti.track_size)))
2989 goto use_toc;
2990
2991 /* if last recorded field is valid, return it. */
2992 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2993 + sizeof(ti.last_rec_address))) {
2994 *last_written = be32_to_cpu(ti.last_rec_address);
2995 } else {
2996 /* make it up instead */
2997 *last_written = be32_to_cpu(ti.track_start) +
2998 be32_to_cpu(ti.track_size);
2999 if (ti.free_blocks)
3000 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3001 }
3002 return 0;
3003
3004 /* this is where we end up if the drive either can't do a
3005 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3006 it doesn't give enough information or fails. then we return
3007 the toc contents. */
3008 use_toc:
3009 toc.cdte_format = CDROM_MSF;
3010 toc.cdte_track = CDROM_LEADOUT;
3011 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3012 return ret;
3013 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3014 *last_written = toc.cdte_addr.lba;
3015 return 0;
3016 }
3017
3018 /* return the next writable block. also for udf file system. */
3019 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3020 {
3021 disc_information di;
3022 track_information ti;
3023 __u16 last_track;
3024 int ret, ti_size;
3025
3026 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3027 goto use_last_written;
3028
3029 ret = cdrom_get_disc_info(cdi, &di);
3030 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3031 + sizeof(di.last_track_lsb))
3032 goto use_last_written;
3033
3034 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3035 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3036 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3037 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3038 goto use_last_written;
3039
3040 /* if this track is blank, try the previous. */
3041 if (ti.blank) {
3042 if (last_track == 1)
3043 goto use_last_written;
3044 last_track--;
3045 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3046 if (ti_size < 0)
3047 goto use_last_written;
3048 }
3049
3050 /* if next recordable address field is valid, use it. */
3051 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3052 + sizeof(ti.next_writable)) {
3053 *next_writable = be32_to_cpu(ti.next_writable);
3054 return 0;
3055 }
3056
3057 use_last_written:
3058 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3059 *next_writable = 0;
3060 return ret;
3061 } else {
3062 *next_writable += 7;
3063 return 0;
3064 }
3065 }
3066
3067 EXPORT_SYMBOL(cdrom_get_last_written);
3068 EXPORT_SYMBOL(register_cdrom);
3069 EXPORT_SYMBOL(unregister_cdrom);
3070 EXPORT_SYMBOL(cdrom_open);
3071 EXPORT_SYMBOL(cdrom_release);
3072 EXPORT_SYMBOL(cdrom_ioctl);
3073 EXPORT_SYMBOL(cdrom_media_changed);
3074 EXPORT_SYMBOL(cdrom_number_of_slots);
3075 EXPORT_SYMBOL(cdrom_mode_select);
3076 EXPORT_SYMBOL(cdrom_mode_sense);
3077 EXPORT_SYMBOL(init_cdrom_command);
3078 EXPORT_SYMBOL(cdrom_get_media_event);
3079
3080 #ifdef CONFIG_SYSCTL
3081
3082 #define CDROM_STR_SIZE 1000
3083
3084 static struct cdrom_sysctl_settings {
3085 char info[CDROM_STR_SIZE]; /* general info */
3086 int autoclose; /* close tray upon mount, etc */
3087 int autoeject; /* eject on umount */
3088 int debug; /* turn on debugging messages */
3089 int lock; /* lock the door on device open */
3090 int check; /* check media type */
3091 } cdrom_sysctl_settings;
3092
3093 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3094 void __user *buffer, size_t *lenp, loff_t *ppos)
3095 {
3096 int pos;
3097 struct cdrom_device_info *cdi;
3098 char *info = cdrom_sysctl_settings.info;
3099
3100 if (!*lenp || (*ppos && !write)) {
3101 *lenp = 0;
3102 return 0;
3103 }
3104
3105 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3106
3107 pos += sprintf(info+pos, "\ndrive name:\t");
3108 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3109 pos += sprintf(info+pos, "\t%s", cdi->name);
3110
3111 pos += sprintf(info+pos, "\ndrive speed:\t");
3112 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3113 pos += sprintf(info+pos, "\t%d", cdi->speed);
3114
3115 pos += sprintf(info+pos, "\ndrive # of slots:");
3116 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3117 pos += sprintf(info+pos, "\t%d", cdi->capacity);
3118
3119 pos += sprintf(info+pos, "\nCan close tray:\t");
3120 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3121 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0);
3122
3123 pos += sprintf(info+pos, "\nCan open tray:\t");
3124 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3125 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0);
3126
3127 pos += sprintf(info+pos, "\nCan lock tray:\t");
3128 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3129 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0);
3130
3131 pos += sprintf(info+pos, "\nCan change speed:");
3132 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3133 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0);
3134
3135 pos += sprintf(info+pos, "\nCan select disk:");
3136 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3137 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0);
3138
3139 pos += sprintf(info+pos, "\nCan read multisession:");
3140 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3141 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0);
3142
3143 pos += sprintf(info+pos, "\nCan read MCN:\t");
3144 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3145 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0);
3146
3147 pos += sprintf(info+pos, "\nReports media changed:");
3148 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3149 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0);
3150
3151 pos += sprintf(info+pos, "\nCan play audio:\t");
3152 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3153 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0);
3154
3155 pos += sprintf(info+pos, "\nCan write CD-R:\t");
3156 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3157 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0);
3158
3159 pos += sprintf(info+pos, "\nCan write CD-RW:");
3160 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3161 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0);
3162
3163 pos += sprintf(info+pos, "\nCan read DVD:\t");
3164 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3165 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0);
3166
3167 pos += sprintf(info+pos, "\nCan write DVD-R:");
3168 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3169 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0);
3170
3171 pos += sprintf(info+pos, "\nCan write DVD-RAM:");
3172 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3173 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0);
3174
3175 pos += sprintf(info+pos, "\nCan read MRW:\t");
3176 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3177 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0);
3178
3179 pos += sprintf(info+pos, "\nCan write MRW:\t");
3180 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3181 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0);
3182
3183 pos += sprintf(info+pos, "\nCan write RAM:\t");
3184 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3185 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0);
3186
3187 strcpy(info+pos,"\n\n");
3188
3189 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3190 }
3191
3192 /* Unfortunately, per device settings are not implemented through
3193 procfs/sysctl yet. When they are, this will naturally disappear. For now
3194 just update all drives. Later this will become the template on which
3195 new registered drives will be based. */
3196 static void cdrom_update_settings(void)
3197 {
3198 struct cdrom_device_info *cdi;
3199
3200 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
3201 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3202 cdi->options |= CDO_AUTO_CLOSE;
3203 else if (!autoclose)
3204 cdi->options &= ~CDO_AUTO_CLOSE;
3205 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3206 cdi->options |= CDO_AUTO_EJECT;
3207 else if (!autoeject)
3208 cdi->options &= ~CDO_AUTO_EJECT;
3209 if (lockdoor && CDROM_CAN(CDC_LOCK))
3210 cdi->options |= CDO_LOCK;
3211 else if (!lockdoor)
3212 cdi->options &= ~CDO_LOCK;
3213 if (check_media_type)
3214 cdi->options |= CDO_CHECK_TYPE;
3215 else
3216 cdi->options &= ~CDO_CHECK_TYPE;
3217 }
3218 }
3219
3220 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3221 void __user *buffer, size_t *lenp, loff_t *ppos)
3222 {
3223 int *valp = ctl->data;
3224 int val = *valp;
3225 int ret;
3226
3227 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3228
3229 if (write && *valp != val) {
3230
3231 /* we only care for 1 or 0. */
3232 if (*valp)
3233 *valp = 1;
3234 else
3235 *valp = 0;
3236
3237 switch (ctl->ctl_name) {
3238 case DEV_CDROM_AUTOCLOSE: {
3239 if (valp == &cdrom_sysctl_settings.autoclose)
3240 autoclose = cdrom_sysctl_settings.autoclose;
3241 break;
3242 }
3243 case DEV_CDROM_AUTOEJECT: {
3244 if (valp == &cdrom_sysctl_settings.autoeject)
3245 autoeject = cdrom_sysctl_settings.autoeject;
3246 break;
3247 }
3248 case DEV_CDROM_DEBUG: {
3249 if (valp == &cdrom_sysctl_settings.debug)
3250 debug = cdrom_sysctl_settings.debug;
3251 break;
3252 }
3253 case DEV_CDROM_LOCK: {
3254 if (valp == &cdrom_sysctl_settings.lock)
3255 lockdoor = cdrom_sysctl_settings.lock;
3256 break;
3257 }
3258 case DEV_CDROM_CHECK_MEDIA: {
3259 if (valp == &cdrom_sysctl_settings.check)
3260 check_media_type = cdrom_sysctl_settings.check;
3261 break;
3262 }
3263 }
3264 /* update the option flags according to the changes. we
3265 don't have per device options through sysctl yet,
3266 but we will have and then this will disappear. */
3267 cdrom_update_settings();
3268 }
3269
3270 return ret;
3271 }
3272
3273 /* Place files in /proc/sys/dev/cdrom */
3274 static ctl_table cdrom_table[] = {
3275 {
3276 .ctl_name = DEV_CDROM_INFO,
3277 .procname = "info",
3278 .data = &cdrom_sysctl_settings.info,
3279 .maxlen = CDROM_STR_SIZE,
3280 .mode = 0444,
3281 .proc_handler = &cdrom_sysctl_info,
3282 },
3283 {
3284 .ctl_name = DEV_CDROM_AUTOCLOSE,
3285 .procname = "autoclose",
3286 .data = &cdrom_sysctl_settings.autoclose,
3287 .maxlen = sizeof(int),
3288 .mode = 0644,
3289 .proc_handler = &cdrom_sysctl_handler,
3290 },
3291 {
3292 .ctl_name = DEV_CDROM_AUTOEJECT,
3293 .procname = "autoeject",
3294 .data = &cdrom_sysctl_settings.autoeject,
3295 .maxlen = sizeof(int),
3296 .mode = 0644,
3297 .proc_handler = &cdrom_sysctl_handler,
3298 },
3299 {
3300 .ctl_name = DEV_CDROM_DEBUG,
3301 .procname = "debug",
3302 .data = &cdrom_sysctl_settings.debug,
3303 .maxlen = sizeof(int),
3304 .mode = 0644,
3305 .proc_handler = &cdrom_sysctl_handler,
3306 },
3307 {
3308 .ctl_name = DEV_CDROM_LOCK,
3309 .procname = "lock",
3310 .data = &cdrom_sysctl_settings.lock,
3311 .maxlen = sizeof(int),
3312 .mode = 0644,
3313 .proc_handler = &cdrom_sysctl_handler,
3314 },
3315 {
3316 .ctl_name = DEV_CDROM_CHECK_MEDIA,
3317 .procname = "check_media",
3318 .data = &cdrom_sysctl_settings.check,
3319 .maxlen = sizeof(int),
3320 .mode = 0644,
3321 .proc_handler = &cdrom_sysctl_handler
3322 },
3323 { .ctl_name = 0 }
3324 };
3325
3326 static ctl_table cdrom_cdrom_table[] = {
3327 {
3328 .ctl_name = DEV_CDROM,
3329 .procname = "cdrom",
3330 .maxlen = 0,
3331 .mode = 0555,
3332 .child = cdrom_table,
3333 },
3334 { .ctl_name = 0 }
3335 };
3336
3337 /* Make sure that /proc/sys/dev is there */
3338 static ctl_table cdrom_root_table[] = {
3339 {
3340 .ctl_name = CTL_DEV,
3341 .procname = "dev",
3342 .maxlen = 0,
3343 .mode = 0555,
3344 .child = cdrom_cdrom_table,
3345 },
3346 { .ctl_name = 0 }
3347 };
3348 static struct ctl_table_header *cdrom_sysctl_header;
3349
3350 static void cdrom_sysctl_register(void)
3351 {
3352 static int initialized;
3353
3354 if (initialized == 1)
3355 return;
3356
3357 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table, 1);
3358 if (cdrom_root_table->ctl_name && cdrom_root_table->child->de)
3359 cdrom_root_table->child->de->owner = THIS_MODULE;
3360
3361 /* set the defaults */
3362 cdrom_sysctl_settings.autoclose = autoclose;
3363 cdrom_sysctl_settings.autoeject = autoeject;
3364 cdrom_sysctl_settings.debug = debug;
3365 cdrom_sysctl_settings.lock = lockdoor;
3366 cdrom_sysctl_settings.check = check_media_type;
3367
3368 initialized = 1;
3369 }
3370
3371 static void cdrom_sysctl_unregister(void)
3372 {
3373 if (cdrom_sysctl_header)
3374 unregister_sysctl_table(cdrom_sysctl_header);
3375 }
3376
3377 #endif /* CONFIG_SYSCTL */
3378
3379 static int __init cdrom_init(void)
3380 {
3381 #ifdef CONFIG_SYSCTL
3382 cdrom_sysctl_register();
3383 #endif
3384 return 0;
3385 }
3386
3387 static void __exit cdrom_exit(void)
3388 {
3389 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3390 #ifdef CONFIG_SYSCTL
3391 cdrom_sysctl_unregister();
3392 #endif
3393 }
3394
3395 module_init(cdrom_init);
3396 module_exit(cdrom_exit);
3397 MODULE_LICENSE("GPL");
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