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Merge branch 'kvm-updates-2.6.27' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / cdrom / cdrom.c
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/module.h>
267 #include <linux/fs.h>
268 #include <linux/buffer_head.h>
269 #include <linux/major.h>
270 #include <linux/types.h>
271 #include <linux/errno.h>
272 #include <linux/kernel.h>
273 #include <linux/mm.h>
274 #include <linux/slab.h>
275 #include <linux/cdrom.h>
276 #include <linux/sysctl.h>
277 #include <linux/proc_fs.h>
278 #include <linux/blkpg.h>
279 #include <linux/init.h>
280 #include <linux/fcntl.h>
281 #include <linux/blkdev.h>
282 #include <linux/times.h>
283
284 #include <asm/uaccess.h>
285
286 /* used to tell the module to turn on full debugging messages */
287 static int debug;
288 /* used to keep tray locked at all times */
289 static int keeplocked;
290 /* default compatibility mode */
291 static int autoclose=1;
292 static int autoeject;
293 static int lockdoor = 1;
294 /* will we ever get to use this... sigh. */
295 static int check_media_type;
296 /* automatically restart mrw format */
297 static int mrw_format_restart = 1;
298 module_param(debug, bool, 0);
299 module_param(autoclose, bool, 0);
300 module_param(autoeject, bool, 0);
301 module_param(lockdoor, bool, 0);
302 module_param(check_media_type, bool, 0);
303 module_param(mrw_format_restart, bool, 0);
304
305 static DEFINE_MUTEX(cdrom_mutex);
306
307 static const char *mrw_format_status[] = {
308 "not mrw",
309 "bgformat inactive",
310 "bgformat active",
311 "mrw complete",
312 };
313
314 static const char *mrw_address_space[] = { "DMA", "GAA" };
315
316 #if (ERRLOGMASK!=CD_NOTHING)
317 #define cdinfo(type, fmt, args...) \
318 if ((ERRLOGMASK & type) || debug==1 ) \
319 printk(KERN_INFO "cdrom: " fmt, ## args)
320 #else
321 #define cdinfo(type, fmt, args...)
322 #endif
323
324 /* These are used to simplify getting data in from and back to user land */
325 #define IOCTL_IN(arg, type, in) \
326 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \
327 return -EFAULT;
328
329 #define IOCTL_OUT(arg, type, out) \
330 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \
331 return -EFAULT;
332
333 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
334 a lot of places. This macro makes the code more clear. */
335 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
336
337 /* used in the audio ioctls */
338 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret
339
340 /*
341 * Another popular OS uses 7 seconds as the hard timeout for default
342 * commands, so it is a good choice for us as well.
343 */
344 #define CDROM_DEF_TIMEOUT (7 * HZ)
345
346 /* Not-exported routines. */
347 static int open_for_data(struct cdrom_device_info * cdi);
348 static int check_for_audio_disc(struct cdrom_device_info * cdi,
349 struct cdrom_device_ops * cdo);
350 static void sanitize_format(union cdrom_addr *addr,
351 u_char * curr, u_char requested);
352 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
353 unsigned long arg);
354
355 int cdrom_get_last_written(struct cdrom_device_info *, long *);
356 static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
357 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
358
359 static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
360
361 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
362
363 static void cdrom_sysctl_register(void);
364
365 static LIST_HEAD(cdrom_list);
366
367 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
368 struct packet_command *cgc)
369 {
370 if (cgc->sense) {
371 cgc->sense->sense_key = 0x05;
372 cgc->sense->asc = 0x20;
373 cgc->sense->ascq = 0x00;
374 }
375
376 cgc->stat = -EIO;
377 return -EIO;
378 }
379
380 /* This macro makes sure we don't have to check on cdrom_device_ops
381 * existence in the run-time routines below. Change_capability is a
382 * hack to have the capability flags defined const, while we can still
383 * change it here without gcc complaining at every line.
384 */
385 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
386
387 int register_cdrom(struct cdrom_device_info *cdi)
388 {
389 static char banner_printed;
390 struct cdrom_device_ops *cdo = cdi->ops;
391 int *change_capability = (int *)&cdo->capability; /* hack */
392
393 cdinfo(CD_OPEN, "entering register_cdrom\n");
394
395 if (cdo->open == NULL || cdo->release == NULL)
396 return -EINVAL;
397 if (!banner_printed) {
398 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
399 banner_printed = 1;
400 cdrom_sysctl_register();
401 }
402
403 ENSURE(drive_status, CDC_DRIVE_STATUS );
404 ENSURE(media_changed, CDC_MEDIA_CHANGED);
405 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
406 ENSURE(lock_door, CDC_LOCK);
407 ENSURE(select_speed, CDC_SELECT_SPEED);
408 ENSURE(get_last_session, CDC_MULTI_SESSION);
409 ENSURE(get_mcn, CDC_MCN);
410 ENSURE(reset, CDC_RESET);
411 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
412 ENSURE(generic_packet, CDC_GENERIC_PACKET);
413 cdi->mc_flags = 0;
414 cdo->n_minors = 0;
415 cdi->options = CDO_USE_FFLAGS;
416
417 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
418 cdi->options |= (int) CDO_AUTO_CLOSE;
419 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
420 cdi->options |= (int) CDO_AUTO_EJECT;
421 if (lockdoor==1)
422 cdi->options |= (int) CDO_LOCK;
423 if (check_media_type==1)
424 cdi->options |= (int) CDO_CHECK_TYPE;
425
426 if (CDROM_CAN(CDC_MRW_W))
427 cdi->exit = cdrom_mrw_exit;
428
429 if (cdi->disk)
430 cdi->cdda_method = CDDA_BPC_FULL;
431 else
432 cdi->cdda_method = CDDA_OLD;
433
434 if (!cdo->generic_packet)
435 cdo->generic_packet = cdrom_dummy_generic_packet;
436
437 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
438 mutex_lock(&cdrom_mutex);
439 list_add(&cdi->list, &cdrom_list);
440 mutex_unlock(&cdrom_mutex);
441 return 0;
442 }
443 #undef ENSURE
444
445 void unregister_cdrom(struct cdrom_device_info *cdi)
446 {
447 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
448
449 mutex_lock(&cdrom_mutex);
450 list_del(&cdi->list);
451 mutex_unlock(&cdrom_mutex);
452
453 if (cdi->exit)
454 cdi->exit(cdi);
455
456 cdi->ops->n_minors--;
457 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
458 }
459
460 int cdrom_get_media_event(struct cdrom_device_info *cdi,
461 struct media_event_desc *med)
462 {
463 struct packet_command cgc;
464 unsigned char buffer[8];
465 struct event_header *eh = (struct event_header *) buffer;
466
467 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
468 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
469 cgc.cmd[1] = 1; /* IMMED */
470 cgc.cmd[4] = 1 << 4; /* media event */
471 cgc.cmd[8] = sizeof(buffer);
472 cgc.quiet = 1;
473
474 if (cdi->ops->generic_packet(cdi, &cgc))
475 return 1;
476
477 if (be16_to_cpu(eh->data_len) < sizeof(*med))
478 return 1;
479
480 if (eh->nea || eh->notification_class != 0x4)
481 return 1;
482
483 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
484 return 0;
485 }
486
487 /*
488 * the first prototypes used 0x2c as the page code for the mrw mode page,
489 * subsequently this was changed to 0x03. probe the one used by this drive
490 */
491 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
492 {
493 struct packet_command cgc;
494 char buffer[16];
495
496 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
497
498 cgc.timeout = HZ;
499 cgc.quiet = 1;
500
501 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
502 cdi->mrw_mode_page = MRW_MODE_PC;
503 return 0;
504 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
505 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
506 return 0;
507 }
508
509 return 1;
510 }
511
512 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
513 {
514 struct packet_command cgc;
515 struct mrw_feature_desc *mfd;
516 unsigned char buffer[16];
517 int ret;
518
519 *write = 0;
520
521 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
522
523 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
524 cgc.cmd[3] = CDF_MRW;
525 cgc.cmd[8] = sizeof(buffer);
526 cgc.quiet = 1;
527
528 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
529 return ret;
530
531 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
532 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
533 return 1;
534 *write = mfd->write;
535
536 if ((ret = cdrom_mrw_probe_pc(cdi))) {
537 *write = 0;
538 return ret;
539 }
540
541 return 0;
542 }
543
544 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
545 {
546 struct packet_command cgc;
547 unsigned char buffer[12];
548 int ret;
549
550 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
551
552 /*
553 * FmtData bit set (bit 4), format type is 1
554 */
555 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
556 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
557 cgc.cmd[1] = (1 << 4) | 1;
558
559 cgc.timeout = 5 * 60 * HZ;
560
561 /*
562 * 4 byte format list header, 8 byte format list descriptor
563 */
564 buffer[1] = 1 << 1;
565 buffer[3] = 8;
566
567 /*
568 * nr_blocks field
569 */
570 buffer[4] = 0xff;
571 buffer[5] = 0xff;
572 buffer[6] = 0xff;
573 buffer[7] = 0xff;
574
575 buffer[8] = 0x24 << 2;
576 buffer[11] = cont;
577
578 ret = cdi->ops->generic_packet(cdi, &cgc);
579 if (ret)
580 printk(KERN_INFO "cdrom: bgformat failed\n");
581
582 return ret;
583 }
584
585 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
586 {
587 struct packet_command cgc;
588
589 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
590 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
591
592 /*
593 * Session = 1, Track = 0
594 */
595 cgc.cmd[1] = !!immed;
596 cgc.cmd[2] = 1 << 1;
597
598 cgc.timeout = 5 * 60 * HZ;
599
600 return cdi->ops->generic_packet(cdi, &cgc);
601 }
602
603 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
604 {
605 struct packet_command cgc;
606
607 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
608 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
609
610 cgc.timeout = 5 * 60 * HZ;
611
612 return cdi->ops->generic_packet(cdi, &cgc);
613 }
614
615 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
616 {
617 disc_information di;
618 int ret;
619
620 ret = cdrom_get_disc_info(cdi, &di);
621 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
622 return 1;
623
624 ret = 0;
625 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
626 printk(KERN_INFO "cdrom: issuing MRW back ground "
627 "format suspend\n");
628 ret = cdrom_mrw_bgformat_susp(cdi, 0);
629 }
630
631 if (!ret && cdi->media_written)
632 ret = cdrom_flush_cache(cdi);
633
634 return ret;
635 }
636
637 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
638 {
639 struct packet_command cgc;
640 struct mode_page_header *mph;
641 char buffer[16];
642 int ret, offset, size;
643
644 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
645
646 cgc.buffer = buffer;
647 cgc.buflen = sizeof(buffer);
648
649 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
650 return ret;
651
652 mph = (struct mode_page_header *) buffer;
653 offset = be16_to_cpu(mph->desc_length);
654 size = be16_to_cpu(mph->mode_data_length) + 2;
655
656 buffer[offset + 3] = space;
657 cgc.buflen = size;
658
659 if ((ret = cdrom_mode_select(cdi, &cgc)))
660 return ret;
661
662 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
663 return 0;
664 }
665
666 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
667 struct rwrt_feature_desc *rfd)
668 {
669 struct packet_command cgc;
670 char buffer[24];
671 int ret;
672
673 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
674
675 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
676 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
677 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
678 cgc.quiet = 1;
679
680 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
681 return ret;
682
683 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
684 return 0;
685 }
686
687 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
688 {
689 struct packet_command cgc;
690 char buffer[16];
691 __be16 *feature_code;
692 int ret;
693
694 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
695
696 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
697 cgc.cmd[3] = CDF_HWDM;
698 cgc.cmd[8] = sizeof(buffer);
699 cgc.quiet = 1;
700
701 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
702 return ret;
703
704 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
705 if (be16_to_cpu(*feature_code) == CDF_HWDM)
706 return 0;
707
708 return 1;
709 }
710
711
712 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
713 {
714 struct rwrt_feature_desc rfd;
715 int ret;
716
717 *write = 0;
718
719 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
720 return ret;
721
722 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
723 *write = 1;
724
725 return 0;
726 }
727
728 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
729 {
730 disc_information di;
731 int ret;
732
733 ret = cdrom_get_disc_info(cdi, &di);
734 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
735 return -1;
736
737 return di.erasable;
738 }
739
740 /*
741 * FIXME: check RO bit
742 */
743 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
744 {
745 int ret = cdrom_media_erasable(cdi);
746
747 /*
748 * allow writable open if media info read worked and media is
749 * erasable, _or_ if it fails since not all drives support it
750 */
751 if (!ret)
752 return 1;
753
754 return 0;
755 }
756
757 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
758 {
759 disc_information di;
760 int ret;
761
762 /*
763 * always reset to DMA lba space on open
764 */
765 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
766 printk(KERN_ERR "cdrom: failed setting lba address space\n");
767 return 1;
768 }
769
770 ret = cdrom_get_disc_info(cdi, &di);
771 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
772 return 1;
773
774 if (!di.erasable)
775 return 1;
776
777 /*
778 * mrw_status
779 * 0 - not MRW formatted
780 * 1 - MRW bgformat started, but not running or complete
781 * 2 - MRW bgformat in progress
782 * 3 - MRW formatting complete
783 */
784 ret = 0;
785 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
786 mrw_format_status[di.mrw_status]);
787 if (!di.mrw_status)
788 ret = 1;
789 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
790 mrw_format_restart)
791 ret = cdrom_mrw_bgformat(cdi, 1);
792
793 return ret;
794 }
795
796 static int mo_open_write(struct cdrom_device_info *cdi)
797 {
798 struct packet_command cgc;
799 char buffer[255];
800 int ret;
801
802 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
803 cgc.quiet = 1;
804
805 /*
806 * obtain write protect information as per
807 * drivers/scsi/sd.c:sd_read_write_protect_flag
808 */
809
810 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
811 if (ret)
812 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
813 if (ret) {
814 cgc.buflen = 255;
815 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
816 }
817
818 /* drive gave us no info, let the user go ahead */
819 if (ret)
820 return 0;
821
822 return buffer[3] & 0x80;
823 }
824
825 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
826 {
827 struct rwrt_feature_desc rfd;
828 int ret;
829
830 if ((ret = cdrom_has_defect_mgt(cdi)))
831 return ret;
832
833 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
834 return ret;
835 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
836 ret = !rfd.curr;
837
838 cdinfo(CD_OPEN, "can open for random write\n");
839 return ret;
840 }
841
842 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
843 {
844 struct packet_command cgc;
845 char buffer[32];
846 int ret, mmc3_profile;
847
848 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
849
850 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
851 cgc.cmd[1] = 0;
852 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
853 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
854 cgc.quiet = 1;
855
856 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
857 mmc3_profile = 0xffff;
858 else
859 mmc3_profile = (buffer[6] << 8) | buffer[7];
860
861 cdi->mmc3_profile = mmc3_profile;
862 }
863
864 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
865 {
866 switch (cdi->mmc3_profile) {
867 case 0x12: /* DVD-RAM */
868 case 0x1A: /* DVD+RW */
869 return 0;
870 default:
871 return 1;
872 }
873 }
874
875 /*
876 * returns 0 for ok to open write, non-0 to disallow
877 */
878 static int cdrom_open_write(struct cdrom_device_info *cdi)
879 {
880 int mrw, mrw_write, ram_write;
881 int ret = 1;
882
883 mrw = 0;
884 if (!cdrom_is_mrw(cdi, &mrw_write))
885 mrw = 1;
886
887 if (CDROM_CAN(CDC_MO_DRIVE))
888 ram_write = 1;
889 else
890 (void) cdrom_is_random_writable(cdi, &ram_write);
891
892 if (mrw)
893 cdi->mask &= ~CDC_MRW;
894 else
895 cdi->mask |= CDC_MRW;
896
897 if (mrw_write)
898 cdi->mask &= ~CDC_MRW_W;
899 else
900 cdi->mask |= CDC_MRW_W;
901
902 if (ram_write)
903 cdi->mask &= ~CDC_RAM;
904 else
905 cdi->mask |= CDC_RAM;
906
907 if (CDROM_CAN(CDC_MRW_W))
908 ret = cdrom_mrw_open_write(cdi);
909 else if (CDROM_CAN(CDC_DVD_RAM))
910 ret = cdrom_dvdram_open_write(cdi);
911 else if (CDROM_CAN(CDC_RAM) &&
912 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
913 ret = cdrom_ram_open_write(cdi);
914 else if (CDROM_CAN(CDC_MO_DRIVE))
915 ret = mo_open_write(cdi);
916 else if (!cdrom_is_dvd_rw(cdi))
917 ret = 0;
918
919 return ret;
920 }
921
922 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
923 {
924 struct packet_command cgc;
925
926 if (cdi->mmc3_profile != 0x1a) {
927 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
928 return;
929 }
930
931 if (!cdi->media_written) {
932 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
933 return;
934 }
935
936 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
937 cdi->name);
938
939 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
940 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
941 cgc.timeout = 30*HZ;
942 cdi->ops->generic_packet(cdi, &cgc);
943
944 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
945 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
946 cgc.timeout = 3000*HZ;
947 cgc.quiet = 1;
948 cdi->ops->generic_packet(cdi, &cgc);
949
950 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
951 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
952 cgc.cmd[2] = 2; /* Close session */
953 cgc.quiet = 1;
954 cgc.timeout = 3000*HZ;
955 cdi->ops->generic_packet(cdi, &cgc);
956
957 cdi->media_written = 0;
958 }
959
960 static int cdrom_close_write(struct cdrom_device_info *cdi)
961 {
962 #if 0
963 return cdrom_flush_cache(cdi);
964 #else
965 return 0;
966 #endif
967 }
968
969 /* We use the open-option O_NONBLOCK to indicate that the
970 * purpose of opening is only for subsequent ioctl() calls; no device
971 * integrity checks are performed.
972 *
973 * We hope that all cd-player programs will adopt this convention. It
974 * is in their own interest: device control becomes a lot easier
975 * this way.
976 */
977 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
978 {
979 int ret;
980
981 cdinfo(CD_OPEN, "entering cdrom_open\n");
982
983 /* if this was a O_NONBLOCK open and we should honor the flags,
984 * do a quick open without drive/disc integrity checks. */
985 cdi->use_count++;
986 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
987 ret = cdi->ops->open(cdi, 1);
988 } else {
989 ret = open_for_data(cdi);
990 if (ret)
991 goto err;
992 cdrom_mmc3_profile(cdi);
993 if (fp->f_mode & FMODE_WRITE) {
994 ret = -EROFS;
995 if (cdrom_open_write(cdi))
996 goto err_release;
997 if (!CDROM_CAN(CDC_RAM))
998 goto err_release;
999 ret = 0;
1000 cdi->media_written = 0;
1001 }
1002 }
1003
1004 if (ret)
1005 goto err;
1006
1007 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1008 cdi->name, cdi->use_count);
1009 /* Do this on open. Don't wait for mount, because they might
1010 not be mounting, but opening with O_NONBLOCK */
1011 check_disk_change(ip->i_bdev);
1012 return 0;
1013 err_release:
1014 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1015 cdi->ops->lock_door(cdi, 0);
1016 cdinfo(CD_OPEN, "door unlocked.\n");
1017 }
1018 cdi->ops->release(cdi);
1019 err:
1020 cdi->use_count--;
1021 return ret;
1022 }
1023
1024 static
1025 int open_for_data(struct cdrom_device_info * cdi)
1026 {
1027 int ret;
1028 struct cdrom_device_ops *cdo = cdi->ops;
1029 tracktype tracks;
1030 cdinfo(CD_OPEN, "entering open_for_data\n");
1031 /* Check if the driver can report drive status. If it can, we
1032 can do clever things. If it can't, well, we at least tried! */
1033 if (cdo->drive_status != NULL) {
1034 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1035 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1036 if (ret == CDS_TRAY_OPEN) {
1037 cdinfo(CD_OPEN, "the tray is open...\n");
1038 /* can/may i close it? */
1039 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1040 cdi->options & CDO_AUTO_CLOSE) {
1041 cdinfo(CD_OPEN, "trying to close the tray.\n");
1042 ret=cdo->tray_move(cdi,0);
1043 if (ret) {
1044 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1045 /* Ignore the error from the low
1046 level driver. We don't care why it
1047 couldn't close the tray. We only care
1048 that there is no disc in the drive,
1049 since that is the _REAL_ problem here.*/
1050 ret=-ENOMEDIUM;
1051 goto clean_up_and_return;
1052 }
1053 } else {
1054 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1055 ret=-ENOMEDIUM;
1056 goto clean_up_and_return;
1057 }
1058 /* Ok, the door should be closed now.. Check again */
1059 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1060 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1061 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1062 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1063 ret=-ENOMEDIUM;
1064 goto clean_up_and_return;
1065 }
1066 cdinfo(CD_OPEN, "the tray is now closed.\n");
1067 }
1068 /* the door should be closed now, check for the disc */
1069 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1070 if (ret!=CDS_DISC_OK) {
1071 ret = -ENOMEDIUM;
1072 goto clean_up_and_return;
1073 }
1074 }
1075 cdrom_count_tracks(cdi, &tracks);
1076 if (tracks.error == CDS_NO_DISC) {
1077 cdinfo(CD_OPEN, "bummer. no disc.\n");
1078 ret=-ENOMEDIUM;
1079 goto clean_up_and_return;
1080 }
1081 /* CD-Players which don't use O_NONBLOCK, workman
1082 * for example, need bit CDO_CHECK_TYPE cleared! */
1083 if (tracks.data==0) {
1084 if (cdi->options & CDO_CHECK_TYPE) {
1085 /* give people a warning shot, now that CDO_CHECK_TYPE
1086 is the default case! */
1087 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1088 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1089 (unsigned int)task_pid_nr(current));
1090 ret=-EMEDIUMTYPE;
1091 goto clean_up_and_return;
1092 }
1093 else {
1094 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1095 }
1096 }
1097
1098 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1099
1100 /* all seems well, we can open the device */
1101 ret = cdo->open(cdi, 0); /* open for data */
1102 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1103 /* After all this careful checking, we shouldn't have problems
1104 opening the device, but we don't want the device locked if
1105 this somehow fails... */
1106 if (ret) {
1107 cdinfo(CD_OPEN, "open device failed.\n");
1108 goto clean_up_and_return;
1109 }
1110 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1111 cdo->lock_door(cdi, 1);
1112 cdinfo(CD_OPEN, "door locked.\n");
1113 }
1114 cdinfo(CD_OPEN, "device opened successfully.\n");
1115 return ret;
1116
1117 /* Something failed. Try to unlock the drive, because some drivers
1118 (notably ide-cd) lock the drive after every command. This produced
1119 a nasty bug where after mount failed, the drive would remain locked!
1120 This ensures that the drive gets unlocked after a mount fails. This
1121 is a goto to avoid bloating the driver with redundant code. */
1122 clean_up_and_return:
1123 cdinfo(CD_OPEN, "open failed.\n");
1124 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1125 cdo->lock_door(cdi, 0);
1126 cdinfo(CD_OPEN, "door unlocked.\n");
1127 }
1128 return ret;
1129 }
1130
1131 /* This code is similar to that in open_for_data. The routine is called
1132 whenever an audio play operation is requested.
1133 */
1134 static int check_for_audio_disc(struct cdrom_device_info * cdi,
1135 struct cdrom_device_ops * cdo)
1136 {
1137 int ret;
1138 tracktype tracks;
1139 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1140 if (!(cdi->options & CDO_CHECK_TYPE))
1141 return 0;
1142 if (cdo->drive_status != NULL) {
1143 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1144 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1145 if (ret == CDS_TRAY_OPEN) {
1146 cdinfo(CD_OPEN, "the tray is open...\n");
1147 /* can/may i close it? */
1148 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1149 cdi->options & CDO_AUTO_CLOSE) {
1150 cdinfo(CD_OPEN, "trying to close the tray.\n");
1151 ret=cdo->tray_move(cdi,0);
1152 if (ret) {
1153 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1154 /* Ignore the error from the low
1155 level driver. We don't care why it
1156 couldn't close the tray. We only care
1157 that there is no disc in the drive,
1158 since that is the _REAL_ problem here.*/
1159 return -ENOMEDIUM;
1160 }
1161 } else {
1162 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1163 return -ENOMEDIUM;
1164 }
1165 /* Ok, the door should be closed now.. Check again */
1166 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1167 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1168 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1169 return -ENOMEDIUM;
1170 }
1171 if (ret!=CDS_DISC_OK) {
1172 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1173 return -EIO;
1174 }
1175 cdinfo(CD_OPEN, "the tray is now closed.\n");
1176 }
1177 }
1178 cdrom_count_tracks(cdi, &tracks);
1179 if (tracks.error)
1180 return(tracks.error);
1181
1182 if (tracks.audio==0)
1183 return -EMEDIUMTYPE;
1184
1185 return 0;
1186 }
1187
1188 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1189 {
1190 struct cdrom_device_ops *cdo = cdi->ops;
1191 int opened_for_data;
1192
1193 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1194
1195 if (cdi->use_count > 0)
1196 cdi->use_count--;
1197
1198 if (cdi->use_count == 0) {
1199 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1200 cdrom_dvd_rw_close_write(cdi);
1201
1202 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1203 cdinfo(CD_CLOSE, "Unlocking door!\n");
1204 cdo->lock_door(cdi, 0);
1205 }
1206 }
1207
1208 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1209 !(fp && fp->f_flags & O_NONBLOCK);
1210
1211 /*
1212 * flush cache on last write release
1213 */
1214 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1215 cdrom_close_write(cdi);
1216
1217 cdo->release(cdi);
1218 if (cdi->use_count == 0) { /* last process that closes dev*/
1219 if (opened_for_data &&
1220 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1221 cdo->tray_move(cdi, 1);
1222 }
1223 return 0;
1224 }
1225
1226 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1227 struct cdrom_changer_info *buf)
1228 {
1229 struct packet_command cgc;
1230 struct cdrom_device_ops *cdo = cdi->ops;
1231 int length;
1232
1233 /*
1234 * Sanyo changer isn't spec compliant (doesn't use regular change
1235 * LOAD_UNLOAD command, and it doesn't implement the mech status
1236 * command below
1237 */
1238 if (cdi->sanyo_slot) {
1239 buf->hdr.nslots = 3;
1240 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1241 for (length = 0; length < 3; length++) {
1242 buf->slots[length].disc_present = 1;
1243 buf->slots[length].change = 0;
1244 }
1245 return 0;
1246 }
1247
1248 length = sizeof(struct cdrom_mechstat_header) +
1249 cdi->capacity * sizeof(struct cdrom_slot);
1250
1251 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1252 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1253 cgc.cmd[8] = (length >> 8) & 0xff;
1254 cgc.cmd[9] = length & 0xff;
1255 return cdo->generic_packet(cdi, &cgc);
1256 }
1257
1258 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1259 {
1260 struct cdrom_changer_info *info;
1261 int ret;
1262
1263 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1264 if (cdi->sanyo_slot)
1265 return CDS_NO_INFO;
1266
1267 info = kmalloc(sizeof(*info), GFP_KERNEL);
1268 if (!info)
1269 return -ENOMEM;
1270
1271 if ((ret = cdrom_read_mech_status(cdi, info)))
1272 goto out_free;
1273
1274 if (info->slots[slot].disc_present)
1275 ret = CDS_DISC_OK;
1276 else
1277 ret = CDS_NO_DISC;
1278
1279 out_free:
1280 kfree(info);
1281 return ret;
1282 }
1283
1284 /* Return the number of slots for an ATAPI/SCSI cdrom,
1285 * return 1 if not a changer.
1286 */
1287 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1288 {
1289 int status;
1290 int nslots = 1;
1291 struct cdrom_changer_info *info;
1292
1293 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1294 /* cdrom_read_mech_status requires a valid value for capacity: */
1295 cdi->capacity = 0;
1296
1297 info = kmalloc(sizeof(*info), GFP_KERNEL);
1298 if (!info)
1299 return -ENOMEM;
1300
1301 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1302 nslots = info->hdr.nslots;
1303
1304 kfree(info);
1305 return nslots;
1306 }
1307
1308
1309 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1310 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1311 {
1312 struct packet_command cgc;
1313
1314 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1315 if (cdi->sanyo_slot && slot < 0)
1316 return 0;
1317
1318 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1319 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1320 cgc.cmd[4] = 2 + (slot >= 0);
1321 cgc.cmd[8] = slot;
1322 cgc.timeout = 60 * HZ;
1323
1324 /* The Sanyo 3 CD changer uses byte 7 of the
1325 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1326 using the GPCMD_LOAD_UNLOAD opcode. */
1327 if (cdi->sanyo_slot && -1 < slot) {
1328 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1329 cgc.cmd[7] = slot;
1330 cgc.cmd[4] = cgc.cmd[8] = 0;
1331 cdi->sanyo_slot = slot ? slot : 3;
1332 }
1333
1334 return cdi->ops->generic_packet(cdi, &cgc);
1335 }
1336
1337 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1338 {
1339 struct cdrom_changer_info *info;
1340 int curslot;
1341 int ret;
1342
1343 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1344 if (!CDROM_CAN(CDC_SELECT_DISC))
1345 return -EDRIVE_CANT_DO_THIS;
1346
1347 (void) cdi->ops->media_changed(cdi, slot);
1348
1349 if (slot == CDSL_NONE) {
1350 /* set media changed bits, on both queues */
1351 cdi->mc_flags = 0x3;
1352 return cdrom_load_unload(cdi, -1);
1353 }
1354
1355 info = kmalloc(sizeof(*info), GFP_KERNEL);
1356 if (!info)
1357 return -ENOMEM;
1358
1359 if ((ret = cdrom_read_mech_status(cdi, info))) {
1360 kfree(info);
1361 return ret;
1362 }
1363
1364 curslot = info->hdr.curslot;
1365 kfree(info);
1366
1367 if (cdi->use_count > 1 || keeplocked) {
1368 if (slot == CDSL_CURRENT) {
1369 return curslot;
1370 } else {
1371 return -EBUSY;
1372 }
1373 }
1374
1375 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1376 which is useful if it had been previously unloaded.
1377 Whether it can or not, it returns the current slot.
1378 Similarly, if slot happens to be the current one, we still
1379 try and load it. */
1380 if (slot == CDSL_CURRENT)
1381 slot = curslot;
1382
1383 /* set media changed bits on both queues */
1384 cdi->mc_flags = 0x3;
1385 if ((ret = cdrom_load_unload(cdi, slot)))
1386 return ret;
1387
1388 return slot;
1389 }
1390
1391 /* We want to make media_changed accessible to the user through an
1392 * ioctl. The main problem now is that we must double-buffer the
1393 * low-level implementation, to assure that the VFS and the user both
1394 * see a medium change once.
1395 */
1396
1397 static
1398 int media_changed(struct cdrom_device_info *cdi, int queue)
1399 {
1400 unsigned int mask = (1 << (queue & 1));
1401 int ret = !!(cdi->mc_flags & mask);
1402
1403 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1404 return ret;
1405 /* changed since last call? */
1406 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1407 cdi->mc_flags = 0x3; /* set bit on both queues */
1408 ret |= 1;
1409 cdi->media_written = 0;
1410 }
1411 cdi->mc_flags &= ~mask; /* clear bit */
1412 return ret;
1413 }
1414
1415 int cdrom_media_changed(struct cdrom_device_info *cdi)
1416 {
1417 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1418 * Returning "0" is always safe (media hasn't been changed). Do that
1419 * if the low-level cdrom driver dosn't support media changed. */
1420 if (cdi == NULL || cdi->ops->media_changed == NULL)
1421 return 0;
1422 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1423 return 0;
1424 return media_changed(cdi, 0);
1425 }
1426
1427 /* badly broken, I know. Is due for a fixup anytime. */
1428 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1429 {
1430 struct cdrom_tochdr header;
1431 struct cdrom_tocentry entry;
1432 int ret, i;
1433 tracks->data=0;
1434 tracks->audio=0;
1435 tracks->cdi=0;
1436 tracks->xa=0;
1437 tracks->error=0;
1438 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1439 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1440 tracks->error=CDS_NO_INFO;
1441 return;
1442 }
1443 /* Grab the TOC header so we can see how many tracks there are */
1444 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1445 if (ret == -ENOMEDIUM)
1446 tracks->error = CDS_NO_DISC;
1447 else
1448 tracks->error = CDS_NO_INFO;
1449 return;
1450 }
1451 /* check what type of tracks are on this disc */
1452 entry.cdte_format = CDROM_MSF;
1453 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1454 entry.cdte_track = i;
1455 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1456 tracks->error=CDS_NO_INFO;
1457 return;
1458 }
1459 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1460 if (entry.cdte_format == 0x10)
1461 tracks->cdi++;
1462 else if (entry.cdte_format == 0x20)
1463 tracks->xa++;
1464 else
1465 tracks->data++;
1466 } else
1467 tracks->audio++;
1468 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1469 i, entry.cdte_format, entry.cdte_ctrl);
1470 }
1471 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1472 header.cdth_trk1, tracks->audio, tracks->data,
1473 tracks->cdi, tracks->xa);
1474 }
1475
1476 /* Requests to the low-level drivers will /always/ be done in the
1477 following format convention:
1478
1479 CDROM_LBA: all data-related requests.
1480 CDROM_MSF: all audio-related requests.
1481
1482 However, a low-level implementation is allowed to refuse this
1483 request, and return information in its own favorite format.
1484
1485 It doesn't make sense /at all/ to ask for a play_audio in LBA
1486 format, or ask for multi-session info in MSF format. However, for
1487 backward compatibility these format requests will be satisfied, but
1488 the requests to the low-level drivers will be sanitized in the more
1489 meaningful format indicated above.
1490 */
1491
1492 static
1493 void sanitize_format(union cdrom_addr *addr,
1494 u_char * curr, u_char requested)
1495 {
1496 if (*curr == requested)
1497 return; /* nothing to be done! */
1498 if (requested == CDROM_LBA) {
1499 addr->lba = (int) addr->msf.frame +
1500 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1501 } else { /* CDROM_MSF */
1502 int lba = addr->lba;
1503 addr->msf.frame = lba % 75;
1504 lba /= 75;
1505 lba += 2;
1506 addr->msf.second = lba % 60;
1507 addr->msf.minute = lba / 60;
1508 }
1509 *curr = requested;
1510 }
1511
1512 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1513 int type)
1514 {
1515 memset(cgc, 0, sizeof(struct packet_command));
1516 if (buf)
1517 memset(buf, 0, len);
1518 cgc->buffer = (char *) buf;
1519 cgc->buflen = len;
1520 cgc->data_direction = type;
1521 cgc->timeout = CDROM_DEF_TIMEOUT;
1522 }
1523
1524 /* DVD handling */
1525
1526 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1527 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1528
1529 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1530 {
1531 cgc->cmd[0] = GPCMD_REPORT_KEY;
1532 cgc->cmd[10] = type | (agid << 6);
1533 switch (type) {
1534 case 0: case 8: case 5: {
1535 cgc->buflen = 8;
1536 break;
1537 }
1538 case 1: {
1539 cgc->buflen = 16;
1540 break;
1541 }
1542 case 2: case 4: {
1543 cgc->buflen = 12;
1544 break;
1545 }
1546 }
1547 cgc->cmd[9] = cgc->buflen;
1548 cgc->data_direction = CGC_DATA_READ;
1549 }
1550
1551 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1552 {
1553 cgc->cmd[0] = GPCMD_SEND_KEY;
1554 cgc->cmd[10] = type | (agid << 6);
1555 switch (type) {
1556 case 1: {
1557 cgc->buflen = 16;
1558 break;
1559 }
1560 case 3: {
1561 cgc->buflen = 12;
1562 break;
1563 }
1564 case 6: {
1565 cgc->buflen = 8;
1566 break;
1567 }
1568 }
1569 cgc->cmd[9] = cgc->buflen;
1570 cgc->data_direction = CGC_DATA_WRITE;
1571 }
1572
1573 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1574 {
1575 int ret;
1576 u_char buf[20];
1577 struct packet_command cgc;
1578 struct cdrom_device_ops *cdo = cdi->ops;
1579 rpc_state_t rpc_state;
1580
1581 memset(buf, 0, sizeof(buf));
1582 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1583
1584 switch (ai->type) {
1585 /* LU data send */
1586 case DVD_LU_SEND_AGID:
1587 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1588 cgc.quiet = 1;
1589 setup_report_key(&cgc, ai->lsa.agid, 0);
1590
1591 if ((ret = cdo->generic_packet(cdi, &cgc)))
1592 return ret;
1593
1594 ai->lsa.agid = buf[7] >> 6;
1595 /* Returning data, let host change state */
1596 break;
1597
1598 case DVD_LU_SEND_KEY1:
1599 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1600 setup_report_key(&cgc, ai->lsk.agid, 2);
1601
1602 if ((ret = cdo->generic_packet(cdi, &cgc)))
1603 return ret;
1604
1605 copy_key(ai->lsk.key, &buf[4]);
1606 /* Returning data, let host change state */
1607 break;
1608
1609 case DVD_LU_SEND_CHALLENGE:
1610 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1611 setup_report_key(&cgc, ai->lsc.agid, 1);
1612
1613 if ((ret = cdo->generic_packet(cdi, &cgc)))
1614 return ret;
1615
1616 copy_chal(ai->lsc.chal, &buf[4]);
1617 /* Returning data, let host change state */
1618 break;
1619
1620 /* Post-auth key */
1621 case DVD_LU_SEND_TITLE_KEY:
1622 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1623 cgc.quiet = 1;
1624 setup_report_key(&cgc, ai->lstk.agid, 4);
1625 cgc.cmd[5] = ai->lstk.lba;
1626 cgc.cmd[4] = ai->lstk.lba >> 8;
1627 cgc.cmd[3] = ai->lstk.lba >> 16;
1628 cgc.cmd[2] = ai->lstk.lba >> 24;
1629
1630 if ((ret = cdo->generic_packet(cdi, &cgc)))
1631 return ret;
1632
1633 ai->lstk.cpm = (buf[4] >> 7) & 1;
1634 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1635 ai->lstk.cgms = (buf[4] >> 4) & 3;
1636 copy_key(ai->lstk.title_key, &buf[5]);
1637 /* Returning data, let host change state */
1638 break;
1639
1640 case DVD_LU_SEND_ASF:
1641 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1642 setup_report_key(&cgc, ai->lsasf.agid, 5);
1643
1644 if ((ret = cdo->generic_packet(cdi, &cgc)))
1645 return ret;
1646
1647 ai->lsasf.asf = buf[7] & 1;
1648 break;
1649
1650 /* LU data receive (LU changes state) */
1651 case DVD_HOST_SEND_CHALLENGE:
1652 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1653 setup_send_key(&cgc, ai->hsc.agid, 1);
1654 buf[1] = 0xe;
1655 copy_chal(&buf[4], ai->hsc.chal);
1656
1657 if ((ret = cdo->generic_packet(cdi, &cgc)))
1658 return ret;
1659
1660 ai->type = DVD_LU_SEND_KEY1;
1661 break;
1662
1663 case DVD_HOST_SEND_KEY2:
1664 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1665 setup_send_key(&cgc, ai->hsk.agid, 3);
1666 buf[1] = 0xa;
1667 copy_key(&buf[4], ai->hsk.key);
1668
1669 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1670 ai->type = DVD_AUTH_FAILURE;
1671 return ret;
1672 }
1673 ai->type = DVD_AUTH_ESTABLISHED;
1674 break;
1675
1676 /* Misc */
1677 case DVD_INVALIDATE_AGID:
1678 cgc.quiet = 1;
1679 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1680 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
1682 return ret;
1683 break;
1684
1685 /* Get region settings */
1686 case DVD_LU_SEND_RPC_STATE:
1687 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1688 setup_report_key(&cgc, 0, 8);
1689 memset(&rpc_state, 0, sizeof(rpc_state_t));
1690 cgc.buffer = (char *) &rpc_state;
1691
1692 if ((ret = cdo->generic_packet(cdi, &cgc)))
1693 return ret;
1694
1695 ai->lrpcs.type = rpc_state.type_code;
1696 ai->lrpcs.vra = rpc_state.vra;
1697 ai->lrpcs.ucca = rpc_state.ucca;
1698 ai->lrpcs.region_mask = rpc_state.region_mask;
1699 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1700 break;
1701
1702 /* Set region settings */
1703 case DVD_HOST_SEND_RPC_STATE:
1704 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1705 setup_send_key(&cgc, 0, 6);
1706 buf[1] = 6;
1707 buf[4] = ai->hrpcs.pdrc;
1708
1709 if ((ret = cdo->generic_packet(cdi, &cgc)))
1710 return ret;
1711 break;
1712
1713 default:
1714 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1715 return -ENOTTY;
1716 }
1717
1718 return 0;
1719 }
1720
1721 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1722 {
1723 unsigned char buf[21], *base;
1724 struct dvd_layer *layer;
1725 struct packet_command cgc;
1726 struct cdrom_device_ops *cdo = cdi->ops;
1727 int ret, layer_num = s->physical.layer_num;
1728
1729 if (layer_num >= DVD_LAYERS)
1730 return -EINVAL;
1731
1732 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1733 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1734 cgc.cmd[6] = layer_num;
1735 cgc.cmd[7] = s->type;
1736 cgc.cmd[9] = cgc.buflen & 0xff;
1737
1738 /*
1739 * refrain from reporting errors on non-existing layers (mainly)
1740 */
1741 cgc.quiet = 1;
1742
1743 if ((ret = cdo->generic_packet(cdi, &cgc)))
1744 return ret;
1745
1746 base = &buf[4];
1747 layer = &s->physical.layer[layer_num];
1748
1749 /*
1750 * place the data... really ugly, but at least we won't have to
1751 * worry about endianess in userspace.
1752 */
1753 memset(layer, 0, sizeof(*layer));
1754 layer->book_version = base[0] & 0xf;
1755 layer->book_type = base[0] >> 4;
1756 layer->min_rate = base[1] & 0xf;
1757 layer->disc_size = base[1] >> 4;
1758 layer->layer_type = base[2] & 0xf;
1759 layer->track_path = (base[2] >> 4) & 1;
1760 layer->nlayers = (base[2] >> 5) & 3;
1761 layer->track_density = base[3] & 0xf;
1762 layer->linear_density = base[3] >> 4;
1763 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1764 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1765 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1766 layer->bca = base[16] >> 7;
1767
1768 return 0;
1769 }
1770
1771 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1772 {
1773 int ret;
1774 u_char buf[8];
1775 struct packet_command cgc;
1776 struct cdrom_device_ops *cdo = cdi->ops;
1777
1778 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1779 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1780 cgc.cmd[6] = s->copyright.layer_num;
1781 cgc.cmd[7] = s->type;
1782 cgc.cmd[8] = cgc.buflen >> 8;
1783 cgc.cmd[9] = cgc.buflen & 0xff;
1784
1785 if ((ret = cdo->generic_packet(cdi, &cgc)))
1786 return ret;
1787
1788 s->copyright.cpst = buf[4];
1789 s->copyright.rmi = buf[5];
1790
1791 return 0;
1792 }
1793
1794 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1795 {
1796 int ret, size;
1797 u_char *buf;
1798 struct packet_command cgc;
1799 struct cdrom_device_ops *cdo = cdi->ops;
1800
1801 size = sizeof(s->disckey.value) + 4;
1802
1803 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1804 return -ENOMEM;
1805
1806 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1807 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1808 cgc.cmd[7] = s->type;
1809 cgc.cmd[8] = size >> 8;
1810 cgc.cmd[9] = size & 0xff;
1811 cgc.cmd[10] = s->disckey.agid << 6;
1812
1813 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1814 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1815
1816 kfree(buf);
1817 return ret;
1818 }
1819
1820 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1821 {
1822 int ret;
1823 u_char buf[4 + 188];
1824 struct packet_command cgc;
1825 struct cdrom_device_ops *cdo = cdi->ops;
1826
1827 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1828 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1829 cgc.cmd[7] = s->type;
1830 cgc.cmd[9] = cgc.buflen & 0xff;
1831
1832 if ((ret = cdo->generic_packet(cdi, &cgc)))
1833 return ret;
1834
1835 s->bca.len = buf[0] << 8 | buf[1];
1836 if (s->bca.len < 12 || s->bca.len > 188) {
1837 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1838 return -EIO;
1839 }
1840 memcpy(s->bca.value, &buf[4], s->bca.len);
1841
1842 return 0;
1843 }
1844
1845 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1846 {
1847 int ret = 0, size;
1848 u_char *buf;
1849 struct packet_command cgc;
1850 struct cdrom_device_ops *cdo = cdi->ops;
1851
1852 size = sizeof(s->manufact.value) + 4;
1853
1854 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1855 return -ENOMEM;
1856
1857 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1858 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1859 cgc.cmd[7] = s->type;
1860 cgc.cmd[8] = size >> 8;
1861 cgc.cmd[9] = size & 0xff;
1862
1863 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1864 kfree(buf);
1865 return ret;
1866 }
1867
1868 s->manufact.len = buf[0] << 8 | buf[1];
1869 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1870 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1871 " (%d)\n", s->manufact.len);
1872 ret = -EIO;
1873 } else {
1874 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1875 }
1876
1877 kfree(buf);
1878 return ret;
1879 }
1880
1881 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1882 {
1883 switch (s->type) {
1884 case DVD_STRUCT_PHYSICAL:
1885 return dvd_read_physical(cdi, s);
1886
1887 case DVD_STRUCT_COPYRIGHT:
1888 return dvd_read_copyright(cdi, s);
1889
1890 case DVD_STRUCT_DISCKEY:
1891 return dvd_read_disckey(cdi, s);
1892
1893 case DVD_STRUCT_BCA:
1894 return dvd_read_bca(cdi, s);
1895
1896 case DVD_STRUCT_MANUFACT:
1897 return dvd_read_manufact(cdi, s);
1898
1899 default:
1900 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1901 s->type);
1902 return -EINVAL;
1903 }
1904 }
1905
1906 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1907 struct packet_command *cgc,
1908 int page_code, int page_control)
1909 {
1910 struct cdrom_device_ops *cdo = cdi->ops;
1911
1912 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1913
1914 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1915 cgc->cmd[2] = page_code | (page_control << 6);
1916 cgc->cmd[7] = cgc->buflen >> 8;
1917 cgc->cmd[8] = cgc->buflen & 0xff;
1918 cgc->data_direction = CGC_DATA_READ;
1919 return cdo->generic_packet(cdi, cgc);
1920 }
1921
1922 int cdrom_mode_select(struct cdrom_device_info *cdi,
1923 struct packet_command *cgc)
1924 {
1925 struct cdrom_device_ops *cdo = cdi->ops;
1926
1927 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1928 memset(cgc->buffer, 0, 2);
1929 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1930 cgc->cmd[1] = 0x10; /* PF */
1931 cgc->cmd[7] = cgc->buflen >> 8;
1932 cgc->cmd[8] = cgc->buflen & 0xff;
1933 cgc->data_direction = CGC_DATA_WRITE;
1934 return cdo->generic_packet(cdi, cgc);
1935 }
1936
1937 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1938 struct cdrom_subchnl *subchnl, int mcn)
1939 {
1940 struct cdrom_device_ops *cdo = cdi->ops;
1941 struct packet_command cgc;
1942 char buffer[32];
1943 int ret;
1944
1945 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1946 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1947 cgc.cmd[1] = 2; /* MSF addressing */
1948 cgc.cmd[2] = 0x40; /* request subQ data */
1949 cgc.cmd[3] = mcn ? 2 : 1;
1950 cgc.cmd[8] = 16;
1951
1952 if ((ret = cdo->generic_packet(cdi, &cgc)))
1953 return ret;
1954
1955 subchnl->cdsc_audiostatus = cgc.buffer[1];
1956 subchnl->cdsc_format = CDROM_MSF;
1957 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1958 subchnl->cdsc_trk = cgc.buffer[6];
1959 subchnl->cdsc_ind = cgc.buffer[7];
1960
1961 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1962 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1963 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1964 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1965 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1966 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1967
1968 return 0;
1969 }
1970
1971 /*
1972 * Specific READ_10 interface
1973 */
1974 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1975 struct packet_command *cgc, int lba,
1976 int blocksize, int nblocks)
1977 {
1978 struct cdrom_device_ops *cdo = cdi->ops;
1979
1980 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1981 cgc->cmd[0] = GPCMD_READ_10;
1982 cgc->cmd[2] = (lba >> 24) & 0xff;
1983 cgc->cmd[3] = (lba >> 16) & 0xff;
1984 cgc->cmd[4] = (lba >> 8) & 0xff;
1985 cgc->cmd[5] = lba & 0xff;
1986 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1987 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1988 cgc->cmd[8] = nblocks & 0xff;
1989 cgc->buflen = blocksize * nblocks;
1990 return cdo->generic_packet(cdi, cgc);
1991 }
1992
1993 /* very generic interface for reading the various types of blocks */
1994 static int cdrom_read_block(struct cdrom_device_info *cdi,
1995 struct packet_command *cgc,
1996 int lba, int nblocks, int format, int blksize)
1997 {
1998 struct cdrom_device_ops *cdo = cdi->ops;
1999
2000 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2001 cgc->cmd[0] = GPCMD_READ_CD;
2002 /* expected sector size - cdda,mode1,etc. */
2003 cgc->cmd[1] = format << 2;
2004 /* starting address */
2005 cgc->cmd[2] = (lba >> 24) & 0xff;
2006 cgc->cmd[3] = (lba >> 16) & 0xff;
2007 cgc->cmd[4] = (lba >> 8) & 0xff;
2008 cgc->cmd[5] = lba & 0xff;
2009 /* number of blocks */
2010 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2011 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2012 cgc->cmd[8] = nblocks & 0xff;
2013 cgc->buflen = blksize * nblocks;
2014
2015 /* set the header info returned */
2016 switch (blksize) {
2017 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2018 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2019 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2020 default : cgc->cmd[9] = 0x10;
2021 }
2022
2023 return cdo->generic_packet(cdi, cgc);
2024 }
2025
2026 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2027 int lba, int nframes)
2028 {
2029 struct packet_command cgc;
2030 int ret = 0;
2031 int nr;
2032
2033 cdi->last_sense = 0;
2034
2035 memset(&cgc, 0, sizeof(cgc));
2036
2037 /*
2038 * start with will ra.nframes size, back down if alloc fails
2039 */
2040 nr = nframes;
2041 do {
2042 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2043 if (cgc.buffer)
2044 break;
2045
2046 nr >>= 1;
2047 } while (nr);
2048
2049 if (!nr)
2050 return -ENOMEM;
2051
2052 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2053 ret = -EFAULT;
2054 goto out;
2055 }
2056
2057 cgc.data_direction = CGC_DATA_READ;
2058 while (nframes > 0) {
2059 if (nr > nframes)
2060 nr = nframes;
2061
2062 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2063 if (ret)
2064 break;
2065 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2066 ret = -EFAULT;
2067 break;
2068 }
2069 ubuf += CD_FRAMESIZE_RAW * nr;
2070 nframes -= nr;
2071 lba += nr;
2072 }
2073 out:
2074 kfree(cgc.buffer);
2075 return ret;
2076 }
2077
2078 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2079 int lba, int nframes)
2080 {
2081 struct request_queue *q = cdi->disk->queue;
2082 struct request *rq;
2083 struct bio *bio;
2084 unsigned int len;
2085 int nr, ret = 0;
2086
2087 if (!q)
2088 return -ENXIO;
2089
2090 rq = blk_get_request(q, READ, GFP_KERNEL);
2091 if (!rq)
2092 return -ENOMEM;
2093
2094 cdi->last_sense = 0;
2095
2096 while (nframes) {
2097 nr = nframes;
2098 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2099 nr = 1;
2100 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2101 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2102
2103 len = nr * CD_FRAMESIZE_RAW;
2104
2105 ret = blk_rq_map_user(q, rq, ubuf, len);
2106 if (ret)
2107 break;
2108
2109 rq->cmd[0] = GPCMD_READ_CD;
2110 rq->cmd[1] = 1 << 2;
2111 rq->cmd[2] = (lba >> 24) & 0xff;
2112 rq->cmd[3] = (lba >> 16) & 0xff;
2113 rq->cmd[4] = (lba >> 8) & 0xff;
2114 rq->cmd[5] = lba & 0xff;
2115 rq->cmd[6] = (nr >> 16) & 0xff;
2116 rq->cmd[7] = (nr >> 8) & 0xff;
2117 rq->cmd[8] = nr & 0xff;
2118 rq->cmd[9] = 0xf8;
2119
2120 rq->cmd_len = 12;
2121 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2122 rq->timeout = 60 * HZ;
2123 bio = rq->bio;
2124
2125 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2126 struct request_sense *s = rq->sense;
2127 ret = -EIO;
2128 cdi->last_sense = s->sense_key;
2129 }
2130
2131 if (blk_rq_unmap_user(bio))
2132 ret = -EFAULT;
2133
2134 if (ret)
2135 break;
2136
2137 nframes -= nr;
2138 lba += nr;
2139 ubuf += len;
2140 }
2141
2142 blk_put_request(rq);
2143 return ret;
2144 }
2145
2146 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2147 int lba, int nframes)
2148 {
2149 int ret;
2150
2151 if (cdi->cdda_method == CDDA_OLD)
2152 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2153
2154 retry:
2155 /*
2156 * for anything else than success and io error, we need to retry
2157 */
2158 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2159 if (!ret || ret != -EIO)
2160 return ret;
2161
2162 /*
2163 * I've seen drives get sense 4/8/3 udma crc errors on multi
2164 * frame dma, so drop to single frame dma if we need to
2165 */
2166 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2167 printk("cdrom: dropping to single frame dma\n");
2168 cdi->cdda_method = CDDA_BPC_SINGLE;
2169 goto retry;
2170 }
2171
2172 /*
2173 * so we have an io error of some sort with multi frame dma. if the
2174 * condition wasn't a hardware error
2175 * problems, not for any error
2176 */
2177 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2178 return ret;
2179
2180 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2181 cdi->cdda_method = CDDA_OLD;
2182 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2183 }
2184
2185 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2186 void __user *argp)
2187 {
2188 struct cdrom_multisession ms_info;
2189 u8 requested_format;
2190 int ret;
2191
2192 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2193
2194 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2195 return -ENOSYS;
2196
2197 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2198 return -EFAULT;
2199
2200 requested_format = ms_info.addr_format;
2201 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2202 return -EINVAL;
2203 ms_info.addr_format = CDROM_LBA;
2204
2205 ret = cdi->ops->get_last_session(cdi, &ms_info);
2206 if (ret)
2207 return ret;
2208
2209 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2210
2211 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2212 return -EFAULT;
2213
2214 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2215 return 0;
2216 }
2217
2218 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2219 {
2220 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2221
2222 if (!CDROM_CAN(CDC_OPEN_TRAY))
2223 return -ENOSYS;
2224 if (cdi->use_count != 1 || keeplocked)
2225 return -EBUSY;
2226 if (CDROM_CAN(CDC_LOCK)) {
2227 int ret = cdi->ops->lock_door(cdi, 0);
2228 if (ret)
2229 return ret;
2230 }
2231
2232 return cdi->ops->tray_move(cdi, 1);
2233 }
2234
2235 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2236 {
2237 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2238
2239 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2240 return -ENOSYS;
2241 return cdi->ops->tray_move(cdi, 0);
2242 }
2243
2244 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2245 unsigned long arg)
2246 {
2247 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2248
2249 if (!CDROM_CAN(CDC_OPEN_TRAY))
2250 return -ENOSYS;
2251 if (keeplocked)
2252 return -EBUSY;
2253
2254 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2255 if (arg)
2256 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2257 return 0;
2258 }
2259
2260 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2261 unsigned long arg)
2262 {
2263 struct cdrom_changer_info *info;
2264 int ret;
2265
2266 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2267
2268 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2269 return -ENOSYS;
2270
2271 /* cannot select disc or select current disc */
2272 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2273 return media_changed(cdi, 1);
2274
2275 if ((unsigned int)arg >= cdi->capacity)
2276 return -EINVAL;
2277
2278 info = kmalloc(sizeof(*info), GFP_KERNEL);
2279 if (!info)
2280 return -ENOMEM;
2281
2282 ret = cdrom_read_mech_status(cdi, info);
2283 if (!ret)
2284 ret = info->slots[arg].change;
2285 kfree(info);
2286 return ret;
2287 }
2288
2289 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2290 unsigned long arg)
2291 {
2292 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2293
2294 /*
2295 * Options need to be in sync with capability.
2296 * Too late for that, so we have to check each one separately.
2297 */
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 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2318 unsigned long arg)
2319 {
2320 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2321
2322 cdi->options &= ~(int) arg;
2323 return cdi->options;
2324 }
2325
2326 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2327 unsigned long arg)
2328 {
2329 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2330
2331 if (!CDROM_CAN(CDC_SELECT_SPEED))
2332 return -ENOSYS;
2333 return cdi->ops->select_speed(cdi, arg);
2334 }
2335
2336 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2337 unsigned long arg)
2338 {
2339 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2340
2341 if (!CDROM_CAN(CDC_SELECT_DISC))
2342 return -ENOSYS;
2343
2344 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2345 if ((int)arg >= cdi->capacity)
2346 return -EINVAL;
2347 }
2348
2349 /*
2350 * ->select_disc is a hook to allow a driver-specific way of
2351 * seleting disc. However, since there is no equivalent hook for
2352 * cdrom_slot_status this may not actually be useful...
2353 */
2354 if (cdi->ops->select_disc)
2355 return cdi->ops->select_disc(cdi, arg);
2356
2357 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2358 return cdrom_select_disc(cdi, arg);
2359 }
2360
2361 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2362 struct block_device *bdev)
2363 {
2364 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2365
2366 if (!capable(CAP_SYS_ADMIN))
2367 return -EACCES;
2368 if (!CDROM_CAN(CDC_RESET))
2369 return -ENOSYS;
2370 invalidate_bdev(bdev);
2371 return cdi->ops->reset(cdi);
2372 }
2373
2374 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2375 unsigned long arg)
2376 {
2377 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2378
2379 if (!CDROM_CAN(CDC_LOCK))
2380 return -EDRIVE_CANT_DO_THIS;
2381
2382 keeplocked = arg ? 1 : 0;
2383
2384 /*
2385 * Don't unlock the door on multiple opens by default, but allow
2386 * root to do so.
2387 */
2388 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2389 return -EBUSY;
2390 return cdi->ops->lock_door(cdi, arg);
2391 }
2392
2393 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2394 unsigned long arg)
2395 {
2396 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2397
2398 if (!capable(CAP_SYS_ADMIN))
2399 return -EACCES;
2400 debug = arg ? 1 : 0;
2401 return debug;
2402 }
2403
2404 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2405 {
2406 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2407 return (cdi->ops->capability & ~cdi->mask);
2408 }
2409
2410 /*
2411 * The following function is implemented, although very few audio
2412 * discs give Universal Product Code information, which should just be
2413 * the Medium Catalog Number on the box. Note, that the way the code
2414 * is written on the CD is /not/ uniform across all discs!
2415 */
2416 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2417 void __user *argp)
2418 {
2419 struct cdrom_mcn mcn;
2420 int ret;
2421
2422 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2423
2424 if (!(cdi->ops->capability & CDC_MCN))
2425 return -ENOSYS;
2426 ret = cdi->ops->get_mcn(cdi, &mcn);
2427 if (ret)
2428 return ret;
2429
2430 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2431 return -EFAULT;
2432 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2433 return 0;
2434 }
2435
2436 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2437 unsigned long arg)
2438 {
2439 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2440
2441 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2442 return -ENOSYS;
2443 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2444 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2445 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2446 if (((int)arg >= cdi->capacity))
2447 return -EINVAL;
2448 return cdrom_slot_status(cdi, arg);
2449 }
2450
2451 /*
2452 * Ok, this is where problems start. The current interface for the
2453 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2454 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2455 * is often the case, it is also very common for CDs to have some tracks
2456 * with data, and some tracks with audio. Just because I feel like it,
2457 * I declare the following to be the best way to cope. If the CD has ANY
2458 * data tracks on it, it will be returned as a data CD. If it has any XA
2459 * tracks, I will return it as that. Now I could simplify this interface
2460 * by combining these returns with the above, but this more clearly
2461 * demonstrates the problem with the current interface. Too bad this
2462 * wasn't designed to use bitmasks... -Erik
2463 *
2464 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2465 * User level programmers might feel the ioctl is not very useful.
2466 * ---david
2467 */
2468 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2469 {
2470 tracktype tracks;
2471
2472 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2473
2474 cdrom_count_tracks(cdi, &tracks);
2475 if (tracks.error)
2476 return tracks.error;
2477
2478 /* Policy mode on */
2479 if (tracks.audio > 0) {
2480 if (!tracks.data && !tracks.cdi && !tracks.xa)
2481 return CDS_AUDIO;
2482 else
2483 return CDS_MIXED;
2484 }
2485
2486 if (tracks.cdi > 0)
2487 return CDS_XA_2_2;
2488 if (tracks.xa > 0)
2489 return CDS_XA_2_1;
2490 if (tracks.data > 0)
2491 return CDS_DATA_1;
2492 /* Policy mode off */
2493
2494 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2495 return CDS_NO_INFO;
2496 }
2497
2498 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2499 {
2500 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2501 return cdi->capacity;
2502 }
2503
2504 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2505 void __user *argp)
2506 {
2507 struct cdrom_subchnl q;
2508 u8 requested, back;
2509 int ret;
2510
2511 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2512
2513 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2514 return -ENOSYS;
2515 if (copy_from_user(&q, argp, sizeof(q)))
2516 return -EFAULT;
2517
2518 requested = q.cdsc_format;
2519 if (requested != CDROM_MSF && requested != CDROM_LBA)
2520 return -EINVAL;
2521 q.cdsc_format = CDROM_MSF;
2522
2523 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2524 if (ret)
2525 return ret;
2526
2527 back = q.cdsc_format; /* local copy */
2528 sanitize_format(&q.cdsc_absaddr, &back, requested);
2529 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2530
2531 if (copy_to_user(argp, &q, sizeof(q)))
2532 return -EFAULT;
2533 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2534 return 0;
2535 }
2536
2537 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2538 void __user *argp)
2539 {
2540 struct cdrom_tochdr header;
2541 int ret;
2542
2543 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2544
2545 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2546 return -ENOSYS;
2547 if (copy_from_user(&header, argp, sizeof(header)))
2548 return -EFAULT;
2549
2550 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2551 if (ret)
2552 return ret;
2553
2554 if (copy_to_user(argp, &header, sizeof(header)))
2555 return -EFAULT;
2556 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2557 return 0;
2558 }
2559
2560 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2561 void __user *argp)
2562 {
2563 struct cdrom_tocentry entry;
2564 u8 requested_format;
2565 int ret;
2566
2567 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2568
2569 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2570 return -ENOSYS;
2571 if (copy_from_user(&entry, argp, sizeof(entry)))
2572 return -EFAULT;
2573
2574 requested_format = entry.cdte_format;
2575 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2576 return -EINVAL;
2577 /* make interface to low-level uniform */
2578 entry.cdte_format = CDROM_MSF;
2579 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2580 if (ret)
2581 return ret;
2582 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2583
2584 if (copy_to_user(argp, &entry, sizeof(entry)))
2585 return -EFAULT;
2586 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2587 return 0;
2588 }
2589
2590 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592 {
2593 struct cdrom_msf msf;
2594
2595 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2596
2597 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2598 return -ENOSYS;
2599 if (copy_from_user(&msf, argp, sizeof(msf)))
2600 return -EFAULT;
2601 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2602 }
2603
2604 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2605 void __user *argp)
2606 {
2607 struct cdrom_ti ti;
2608 int ret;
2609
2610 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2611
2612 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2613 return -ENOSYS;
2614 if (copy_from_user(&ti, argp, sizeof(ti)))
2615 return -EFAULT;
2616
2617 ret = check_for_audio_disc(cdi, cdi->ops);
2618 if (ret)
2619 return ret;
2620 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2621 }
2622 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2623 void __user *argp)
2624 {
2625 struct cdrom_volctrl volume;
2626
2627 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2628
2629 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2630 return -ENOSYS;
2631 if (copy_from_user(&volume, argp, sizeof(volume)))
2632 return -EFAULT;
2633 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2634 }
2635
2636 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2637 void __user *argp)
2638 {
2639 struct cdrom_volctrl volume;
2640 int ret;
2641
2642 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2643
2644 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2645 return -ENOSYS;
2646
2647 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2648 if (ret)
2649 return ret;
2650
2651 if (copy_to_user(argp, &volume, sizeof(volume)))
2652 return -EFAULT;
2653 return 0;
2654 }
2655
2656 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2657 unsigned int cmd)
2658 {
2659 int ret;
2660
2661 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2662
2663 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2664 return -ENOSYS;
2665 ret = check_for_audio_disc(cdi, cdi->ops);
2666 if (ret)
2667 return ret;
2668 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2669 }
2670
2671 /*
2672 * Just about every imaginable ioctl is supported in the Uniform layer
2673 * these days.
2674 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2675 */
2676 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2677 struct inode *ip, unsigned int cmd, unsigned long arg)
2678 {
2679 void __user *argp = (void __user *)arg;
2680 int ret;
2681 struct gendisk *disk = ip->i_bdev->bd_disk;
2682
2683 /*
2684 * Try the generic SCSI command ioctl's first.
2685 */
2686 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp);
2687 if (ret != -ENOTTY)
2688 return ret;
2689
2690 switch (cmd) {
2691 case CDROMMULTISESSION:
2692 return cdrom_ioctl_multisession(cdi, argp);
2693 case CDROMEJECT:
2694 return cdrom_ioctl_eject(cdi);
2695 case CDROMCLOSETRAY:
2696 return cdrom_ioctl_closetray(cdi);
2697 case CDROMEJECT_SW:
2698 return cdrom_ioctl_eject_sw(cdi, arg);
2699 case CDROM_MEDIA_CHANGED:
2700 return cdrom_ioctl_media_changed(cdi, arg);
2701 case CDROM_SET_OPTIONS:
2702 return cdrom_ioctl_set_options(cdi, arg);
2703 case CDROM_CLEAR_OPTIONS:
2704 return cdrom_ioctl_clear_options(cdi, arg);
2705 case CDROM_SELECT_SPEED:
2706 return cdrom_ioctl_select_speed(cdi, arg);
2707 case CDROM_SELECT_DISC:
2708 return cdrom_ioctl_select_disc(cdi, arg);
2709 case CDROMRESET:
2710 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2711 case CDROM_LOCKDOOR:
2712 return cdrom_ioctl_lock_door(cdi, arg);
2713 case CDROM_DEBUG:
2714 return cdrom_ioctl_debug(cdi, arg);
2715 case CDROM_GET_CAPABILITY:
2716 return cdrom_ioctl_get_capability(cdi);
2717 case CDROM_GET_MCN:
2718 return cdrom_ioctl_get_mcn(cdi, argp);
2719 case CDROM_DRIVE_STATUS:
2720 return cdrom_ioctl_drive_status(cdi, arg);
2721 case CDROM_DISC_STATUS:
2722 return cdrom_ioctl_disc_status(cdi);
2723 case CDROM_CHANGER_NSLOTS:
2724 return cdrom_ioctl_changer_nslots(cdi);
2725 }
2726
2727 /*
2728 * Use the ioctls that are implemented through the generic_packet()
2729 * interface. this may look at bit funny, but if -ENOTTY is
2730 * returned that particular ioctl is not implemented and we
2731 * let it go through the device specific ones.
2732 */
2733 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2734 ret = mmc_ioctl(cdi, cmd, arg);
2735 if (ret != -ENOTTY)
2736 return ret;
2737 }
2738
2739 /*
2740 * Note: most of the cdinfo() calls are commented out here,
2741 * because they fill up the sys log when CD players poll
2742 * the drive.
2743 */
2744 switch (cmd) {
2745 case CDROMSUBCHNL:
2746 return cdrom_ioctl_get_subchnl(cdi, argp);
2747 case CDROMREADTOCHDR:
2748 return cdrom_ioctl_read_tochdr(cdi, argp);
2749 case CDROMREADTOCENTRY:
2750 return cdrom_ioctl_read_tocentry(cdi, argp);
2751 case CDROMPLAYMSF:
2752 return cdrom_ioctl_play_msf(cdi, argp);
2753 case CDROMPLAYTRKIND:
2754 return cdrom_ioctl_play_trkind(cdi, argp);
2755 case CDROMVOLCTRL:
2756 return cdrom_ioctl_volctrl(cdi, argp);
2757 case CDROMVOLREAD:
2758 return cdrom_ioctl_volread(cdi, argp);
2759 case CDROMSTART:
2760 case CDROMSTOP:
2761 case CDROMPAUSE:
2762 case CDROMRESUME:
2763 return cdrom_ioctl_audioctl(cdi, cmd);
2764 }
2765
2766 return -ENOSYS;
2767 }
2768
2769 /*
2770 * Required when we need to use READ_10 to issue other than 2048 block
2771 * reads
2772 */
2773 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2774 {
2775 struct cdrom_device_ops *cdo = cdi->ops;
2776 struct packet_command cgc;
2777 struct modesel_head mh;
2778
2779 memset(&mh, 0, sizeof(mh));
2780 mh.block_desc_length = 0x08;
2781 mh.block_length_med = (size >> 8) & 0xff;
2782 mh.block_length_lo = size & 0xff;
2783
2784 memset(&cgc, 0, sizeof(cgc));
2785 cgc.cmd[0] = 0x15;
2786 cgc.cmd[1] = 1 << 4;
2787 cgc.cmd[4] = 12;
2788 cgc.buflen = sizeof(mh);
2789 cgc.buffer = (char *) &mh;
2790 cgc.data_direction = CGC_DATA_WRITE;
2791 mh.block_desc_length = 0x08;
2792 mh.block_length_med = (size >> 8) & 0xff;
2793 mh.block_length_lo = size & 0xff;
2794
2795 return cdo->generic_packet(cdi, &cgc);
2796 }
2797
2798 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2799 unsigned long arg)
2800 {
2801 struct cdrom_device_ops *cdo = cdi->ops;
2802 struct packet_command cgc;
2803 struct request_sense sense;
2804 unsigned char buffer[32];
2805 int ret = 0;
2806
2807 memset(&cgc, 0, sizeof(cgc));
2808
2809 /* build a unified command and queue it through
2810 cdo->generic_packet() */
2811 switch (cmd) {
2812 case CDROMREADRAW:
2813 case CDROMREADMODE1:
2814 case CDROMREADMODE2: {
2815 struct cdrom_msf msf;
2816 int blocksize = 0, format = 0, lba;
2817
2818 switch (cmd) {
2819 case CDROMREADRAW:
2820 blocksize = CD_FRAMESIZE_RAW;
2821 break;
2822 case CDROMREADMODE1:
2823 blocksize = CD_FRAMESIZE;
2824 format = 2;
2825 break;
2826 case CDROMREADMODE2:
2827 blocksize = CD_FRAMESIZE_RAW0;
2828 break;
2829 }
2830 IOCTL_IN(arg, struct cdrom_msf, msf);
2831 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2832 /* FIXME: we need upper bound checking, too!! */
2833 if (lba < 0)
2834 return -EINVAL;
2835 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
2836 if (cgc.buffer == NULL)
2837 return -ENOMEM;
2838 memset(&sense, 0, sizeof(sense));
2839 cgc.sense = &sense;
2840 cgc.data_direction = CGC_DATA_READ;
2841 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2842 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2843 /*
2844 * SCSI-II devices are not required to support
2845 * READ_CD, so let's try switching block size
2846 */
2847 /* FIXME: switch back again... */
2848 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2849 kfree(cgc.buffer);
2850 return ret;
2851 }
2852 cgc.sense = NULL;
2853 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2854 ret |= cdrom_switch_blocksize(cdi, blocksize);
2855 }
2856 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2857 ret = -EFAULT;
2858 kfree(cgc.buffer);
2859 return ret;
2860 }
2861 case CDROMREADAUDIO: {
2862 struct cdrom_read_audio ra;
2863 int lba;
2864
2865 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2866
2867 if (ra.addr_format == CDROM_MSF)
2868 lba = msf_to_lba(ra.addr.msf.minute,
2869 ra.addr.msf.second,
2870 ra.addr.msf.frame);
2871 else if (ra.addr_format == CDROM_LBA)
2872 lba = ra.addr.lba;
2873 else
2874 return -EINVAL;
2875
2876 /* FIXME: we need upper bound checking, too!! */
2877 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2878 return -EINVAL;
2879
2880 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2881 }
2882 case CDROMSUBCHNL: {
2883 struct cdrom_subchnl q;
2884 u_char requested, back;
2885 IOCTL_IN(arg, struct cdrom_subchnl, q);
2886 requested = q.cdsc_format;
2887 if (!((requested == CDROM_MSF) ||
2888 (requested == CDROM_LBA)))
2889 return -EINVAL;
2890 q.cdsc_format = CDROM_MSF;
2891 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2892 return ret;
2893 back = q.cdsc_format; /* local copy */
2894 sanitize_format(&q.cdsc_absaddr, &back, requested);
2895 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2896 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2897 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2898 return 0;
2899 }
2900 case CDROMPLAYMSF: {
2901 struct cdrom_msf msf;
2902 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2903 IOCTL_IN(arg, struct cdrom_msf, msf);
2904 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2905 cgc.cmd[3] = msf.cdmsf_min0;
2906 cgc.cmd[4] = msf.cdmsf_sec0;
2907 cgc.cmd[5] = msf.cdmsf_frame0;
2908 cgc.cmd[6] = msf.cdmsf_min1;
2909 cgc.cmd[7] = msf.cdmsf_sec1;
2910 cgc.cmd[8] = msf.cdmsf_frame1;
2911 cgc.data_direction = CGC_DATA_NONE;
2912 return cdo->generic_packet(cdi, &cgc);
2913 }
2914 case CDROMPLAYBLK: {
2915 struct cdrom_blk blk;
2916 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2917 IOCTL_IN(arg, struct cdrom_blk, blk);
2918 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2919 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2920 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2921 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2922 cgc.cmd[5] = blk.from & 0xff;
2923 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2924 cgc.cmd[8] = blk.len & 0xff;
2925 cgc.data_direction = CGC_DATA_NONE;
2926 return cdo->generic_packet(cdi, &cgc);
2927 }
2928 case CDROMVOLCTRL:
2929 case CDROMVOLREAD: {
2930 struct cdrom_volctrl volctrl;
2931 char mask[sizeof(buffer)];
2932 unsigned short offset;
2933
2934 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2935
2936 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2937
2938 cgc.buffer = buffer;
2939 cgc.buflen = 24;
2940 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2941 return ret;
2942
2943 /* originally the code depended on buffer[1] to determine
2944 how much data is available for transfer. buffer[1] is
2945 unfortunately ambigious and the only reliable way seem
2946 to be to simply skip over the block descriptor... */
2947 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
2948
2949 if (offset + 16 > sizeof(buffer))
2950 return -E2BIG;
2951
2952 if (offset + 16 > cgc.buflen) {
2953 cgc.buflen = offset+16;
2954 ret = cdrom_mode_sense(cdi, &cgc,
2955 GPMODE_AUDIO_CTL_PAGE, 0);
2956 if (ret)
2957 return ret;
2958 }
2959
2960 /* sanity check */
2961 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2962 buffer[offset+1] < 14)
2963 return -EINVAL;
2964
2965 /* now we have the current volume settings. if it was only
2966 a CDROMVOLREAD, return these values */
2967 if (cmd == CDROMVOLREAD) {
2968 volctrl.channel0 = buffer[offset+9];
2969 volctrl.channel1 = buffer[offset+11];
2970 volctrl.channel2 = buffer[offset+13];
2971 volctrl.channel3 = buffer[offset+15];
2972 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2973 return 0;
2974 }
2975
2976 /* get the volume mask */
2977 cgc.buffer = mask;
2978 if ((ret = cdrom_mode_sense(cdi, &cgc,
2979 GPMODE_AUDIO_CTL_PAGE, 1)))
2980 return ret;
2981
2982 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2983 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2984 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2985 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2986
2987 /* set volume */
2988 cgc.buffer = buffer + offset - 8;
2989 memset(cgc.buffer, 0, 8);
2990 return cdrom_mode_select(cdi, &cgc);
2991 }
2992
2993 case CDROMSTART:
2994 case CDROMSTOP: {
2995 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2996 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2997 cgc.cmd[1] = 1;
2998 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
2999 cgc.data_direction = CGC_DATA_NONE;
3000 return cdo->generic_packet(cdi, &cgc);
3001 }
3002
3003 case CDROMPAUSE:
3004 case CDROMRESUME: {
3005 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3006 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3007 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3008 cgc.data_direction = CGC_DATA_NONE;
3009 return cdo->generic_packet(cdi, &cgc);
3010 }
3011
3012 case DVD_READ_STRUCT: {
3013 dvd_struct *s;
3014 int size = sizeof(dvd_struct);
3015 if (!CDROM_CAN(CDC_DVD))
3016 return -ENOSYS;
3017 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
3018 return -ENOMEM;
3019 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3020 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3021 kfree(s);
3022 return -EFAULT;
3023 }
3024 if ((ret = dvd_read_struct(cdi, s))) {
3025 kfree(s);
3026 return ret;
3027 }
3028 if (copy_to_user((dvd_struct __user *)arg, s, size))
3029 ret = -EFAULT;
3030 kfree(s);
3031 return ret;
3032 }
3033
3034 case DVD_AUTH: {
3035 dvd_authinfo ai;
3036 if (!CDROM_CAN(CDC_DVD))
3037 return -ENOSYS;
3038 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3039 IOCTL_IN(arg, dvd_authinfo, ai);
3040 if ((ret = dvd_do_auth (cdi, &ai)))
3041 return ret;
3042 IOCTL_OUT(arg, dvd_authinfo, ai);
3043 return 0;
3044 }
3045
3046 case CDROM_NEXT_WRITABLE: {
3047 long next = 0;
3048 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3049 if ((ret = cdrom_get_next_writable(cdi, &next)))
3050 return ret;
3051 IOCTL_OUT(arg, long, next);
3052 return 0;
3053 }
3054 case CDROM_LAST_WRITTEN: {
3055 long last = 0;
3056 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3057 if ((ret = cdrom_get_last_written(cdi, &last)))
3058 return ret;
3059 IOCTL_OUT(arg, long, last);
3060 return 0;
3061 }
3062 } /* switch */
3063
3064 return -ENOTTY;
3065 }
3066
3067 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3068 track_information *ti)
3069 {
3070 struct cdrom_device_ops *cdo = cdi->ops;
3071 struct packet_command cgc;
3072 int ret, buflen;
3073
3074 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3075 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3076 cgc.cmd[1] = type & 3;
3077 cgc.cmd[4] = (track & 0xff00) >> 8;
3078 cgc.cmd[5] = track & 0xff;
3079 cgc.cmd[8] = 8;
3080 cgc.quiet = 1;
3081
3082 if ((ret = cdo->generic_packet(cdi, &cgc)))
3083 return ret;
3084
3085 buflen = be16_to_cpu(ti->track_information_length) +
3086 sizeof(ti->track_information_length);
3087
3088 if (buflen > sizeof(track_information))
3089 buflen = sizeof(track_information);
3090
3091 cgc.cmd[8] = cgc.buflen = buflen;
3092 if ((ret = cdo->generic_packet(cdi, &cgc)))
3093 return ret;
3094
3095 /* return actual fill size */
3096 return buflen;
3097 }
3098
3099 /* requires CD R/RW */
3100 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3101 {
3102 struct cdrom_device_ops *cdo = cdi->ops;
3103 struct packet_command cgc;
3104 int ret, buflen;
3105
3106 /* set up command and get the disc info */
3107 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3108 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3109 cgc.cmd[8] = cgc.buflen = 2;
3110 cgc.quiet = 1;
3111
3112 if ((ret = cdo->generic_packet(cdi, &cgc)))
3113 return ret;
3114
3115 /* not all drives have the same disc_info length, so requeue
3116 * packet with the length the drive tells us it can supply
3117 */
3118 buflen = be16_to_cpu(di->disc_information_length) +
3119 sizeof(di->disc_information_length);
3120
3121 if (buflen > sizeof(disc_information))
3122 buflen = sizeof(disc_information);
3123
3124 cgc.cmd[8] = cgc.buflen = buflen;
3125 if ((ret = cdo->generic_packet(cdi, &cgc)))
3126 return ret;
3127
3128 /* return actual fill size */
3129 return buflen;
3130 }
3131
3132 /* return the last written block on the CD-R media. this is for the udf
3133 file system. */
3134 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3135 {
3136 struct cdrom_tocentry toc;
3137 disc_information di;
3138 track_information ti;
3139 __u32 last_track;
3140 int ret = -1, ti_size;
3141
3142 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3143 goto use_toc;
3144
3145 ret = cdrom_get_disc_info(cdi, &di);
3146 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3147 + sizeof(di.last_track_lsb)))
3148 goto use_toc;
3149
3150 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3151 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3152 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3153 if (ti_size < (int)offsetof(typeof(ti), track_start))
3154 goto use_toc;
3155
3156 /* if this track is blank, try the previous. */
3157 if (ti.blank) {
3158 if (last_track==1)
3159 goto use_toc;
3160 last_track--;
3161 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3162 }
3163
3164 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3165 + sizeof(ti.track_size)))
3166 goto use_toc;
3167
3168 /* if last recorded field is valid, return it. */
3169 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3170 + sizeof(ti.last_rec_address))) {
3171 *last_written = be32_to_cpu(ti.last_rec_address);
3172 } else {
3173 /* make it up instead */
3174 *last_written = be32_to_cpu(ti.track_start) +
3175 be32_to_cpu(ti.track_size);
3176 if (ti.free_blocks)
3177 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3178 }
3179 return 0;
3180
3181 /* this is where we end up if the drive either can't do a
3182 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3183 it doesn't give enough information or fails. then we return
3184 the toc contents. */
3185 use_toc:
3186 toc.cdte_format = CDROM_MSF;
3187 toc.cdte_track = CDROM_LEADOUT;
3188 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3189 return ret;
3190 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3191 *last_written = toc.cdte_addr.lba;
3192 return 0;
3193 }
3194
3195 /* return the next writable block. also for udf file system. */
3196 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3197 {
3198 disc_information di;
3199 track_information ti;
3200 __u16 last_track;
3201 int ret, ti_size;
3202
3203 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3204 goto use_last_written;
3205
3206 ret = cdrom_get_disc_info(cdi, &di);
3207 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3208 + sizeof(di.last_track_lsb))
3209 goto use_last_written;
3210
3211 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3212 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3213 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3214 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3215 goto use_last_written;
3216
3217 /* if this track is blank, try the previous. */
3218 if (ti.blank) {
3219 if (last_track == 1)
3220 goto use_last_written;
3221 last_track--;
3222 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3223 if (ti_size < 0)
3224 goto use_last_written;
3225 }
3226
3227 /* if next recordable address field is valid, use it. */
3228 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3229 + sizeof(ti.next_writable)) {
3230 *next_writable = be32_to_cpu(ti.next_writable);
3231 return 0;
3232 }
3233
3234 use_last_written:
3235 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3236 *next_writable = 0;
3237 return ret;
3238 } else {
3239 *next_writable += 7;
3240 return 0;
3241 }
3242 }
3243
3244 EXPORT_SYMBOL(cdrom_get_last_written);
3245 EXPORT_SYMBOL(register_cdrom);
3246 EXPORT_SYMBOL(unregister_cdrom);
3247 EXPORT_SYMBOL(cdrom_open);
3248 EXPORT_SYMBOL(cdrom_release);
3249 EXPORT_SYMBOL(cdrom_ioctl);
3250 EXPORT_SYMBOL(cdrom_media_changed);
3251 EXPORT_SYMBOL(cdrom_number_of_slots);
3252 EXPORT_SYMBOL(cdrom_mode_select);
3253 EXPORT_SYMBOL(cdrom_mode_sense);
3254 EXPORT_SYMBOL(init_cdrom_command);
3255 EXPORT_SYMBOL(cdrom_get_media_event);
3256
3257 #ifdef CONFIG_SYSCTL
3258
3259 #define CDROM_STR_SIZE 1000
3260
3261 static struct cdrom_sysctl_settings {
3262 char info[CDROM_STR_SIZE]; /* general info */
3263 int autoclose; /* close tray upon mount, etc */
3264 int autoeject; /* eject on umount */
3265 int debug; /* turn on debugging messages */
3266 int lock; /* lock the door on device open */
3267 int check; /* check media type */
3268 } cdrom_sysctl_settings;
3269
3270 enum cdrom_print_option {
3271 CTL_NAME,
3272 CTL_SPEED,
3273 CTL_SLOTS,
3274 CTL_CAPABILITY
3275 };
3276
3277 static int cdrom_print_info(const char *header, int val, char *info,
3278 int *pos, enum cdrom_print_option option)
3279 {
3280 const int max_size = sizeof(cdrom_sysctl_settings.info);
3281 struct cdrom_device_info *cdi;
3282 int ret;
3283
3284 ret = scnprintf(info + *pos, max_size - *pos, header);
3285 if (!ret)
3286 return 1;
3287
3288 *pos += ret;
3289
3290 list_for_each_entry(cdi, &cdrom_list, list) {
3291 switch (option) {
3292 case CTL_NAME:
3293 ret = scnprintf(info + *pos, max_size - *pos,
3294 "\t%s", cdi->name);
3295 break;
3296 case CTL_SPEED:
3297 ret = scnprintf(info + *pos, max_size - *pos,
3298 "\t%d", cdi->speed);
3299 break;
3300 case CTL_SLOTS:
3301 ret = scnprintf(info + *pos, max_size - *pos,
3302 "\t%d", cdi->capacity);
3303 break;
3304 case CTL_CAPABILITY:
3305 ret = scnprintf(info + *pos, max_size - *pos,
3306 "\t%d", CDROM_CAN(val) != 0);
3307 break;
3308 default:
3309 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3310 return 1;
3311 }
3312 if (!ret)
3313 return 1;
3314 *pos += ret;
3315 }
3316
3317 return 0;
3318 }
3319
3320 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3321 void __user *buffer, size_t *lenp, loff_t *ppos)
3322 {
3323 int pos;
3324 char *info = cdrom_sysctl_settings.info;
3325 const int max_size = sizeof(cdrom_sysctl_settings.info);
3326
3327 if (!*lenp || (*ppos && !write)) {
3328 *lenp = 0;
3329 return 0;
3330 }
3331
3332 mutex_lock(&cdrom_mutex);
3333
3334 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3335
3336 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3337 goto done;
3338 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3339 goto done;
3340 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3341 goto done;
3342 if (cdrom_print_info("\nCan close tray:\t",
3343 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3344 goto done;
3345 if (cdrom_print_info("\nCan open tray:\t",
3346 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3347 goto done;
3348 if (cdrom_print_info("\nCan lock tray:\t",
3349 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3350 goto done;
3351 if (cdrom_print_info("\nCan change speed:",
3352 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3353 goto done;
3354 if (cdrom_print_info("\nCan select disk:",
3355 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3356 goto done;
3357 if (cdrom_print_info("\nCan read multisession:",
3358 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3359 goto done;
3360 if (cdrom_print_info("\nCan read MCN:\t",
3361 CDC_MCN, info, &pos, CTL_CAPABILITY))
3362 goto done;
3363 if (cdrom_print_info("\nReports media changed:",
3364 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3365 goto done;
3366 if (cdrom_print_info("\nCan play audio:\t",
3367 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3368 goto done;
3369 if (cdrom_print_info("\nCan write CD-R:\t",
3370 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3371 goto done;
3372 if (cdrom_print_info("\nCan write CD-RW:",
3373 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3374 goto done;
3375 if (cdrom_print_info("\nCan read DVD:\t",
3376 CDC_DVD, info, &pos, CTL_CAPABILITY))
3377 goto done;
3378 if (cdrom_print_info("\nCan write DVD-R:",
3379 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3380 goto done;
3381 if (cdrom_print_info("\nCan write DVD-RAM:",
3382 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3383 goto done;
3384 if (cdrom_print_info("\nCan read MRW:\t",
3385 CDC_MRW, info, &pos, CTL_CAPABILITY))
3386 goto done;
3387 if (cdrom_print_info("\nCan write MRW:\t",
3388 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3389 goto done;
3390 if (cdrom_print_info("\nCan write RAM:\t",
3391 CDC_RAM, info, &pos, CTL_CAPABILITY))
3392 goto done;
3393 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3394 goto done;
3395 doit:
3396 mutex_unlock(&cdrom_mutex);
3397 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3398 done:
3399 printk(KERN_INFO "cdrom: info buffer too small\n");
3400 goto doit;
3401 }
3402
3403 /* Unfortunately, per device settings are not implemented through
3404 procfs/sysctl yet. When they are, this will naturally disappear. For now
3405 just update all drives. Later this will become the template on which
3406 new registered drives will be based. */
3407 static void cdrom_update_settings(void)
3408 {
3409 struct cdrom_device_info *cdi;
3410
3411 mutex_lock(&cdrom_mutex);
3412 list_for_each_entry(cdi, &cdrom_list, list) {
3413 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3414 cdi->options |= CDO_AUTO_CLOSE;
3415 else if (!autoclose)
3416 cdi->options &= ~CDO_AUTO_CLOSE;
3417 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3418 cdi->options |= CDO_AUTO_EJECT;
3419 else if (!autoeject)
3420 cdi->options &= ~CDO_AUTO_EJECT;
3421 if (lockdoor && CDROM_CAN(CDC_LOCK))
3422 cdi->options |= CDO_LOCK;
3423 else if (!lockdoor)
3424 cdi->options &= ~CDO_LOCK;
3425 if (check_media_type)
3426 cdi->options |= CDO_CHECK_TYPE;
3427 else
3428 cdi->options &= ~CDO_CHECK_TYPE;
3429 }
3430 mutex_unlock(&cdrom_mutex);
3431 }
3432
3433 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3434 void __user *buffer, size_t *lenp, loff_t *ppos)
3435 {
3436 int ret;
3437
3438 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3439
3440 if (write) {
3441
3442 /* we only care for 1 or 0. */
3443 autoclose = !!cdrom_sysctl_settings.autoclose;
3444 autoeject = !!cdrom_sysctl_settings.autoeject;
3445 debug = !!cdrom_sysctl_settings.debug;
3446 lockdoor = !!cdrom_sysctl_settings.lock;
3447 check_media_type = !!cdrom_sysctl_settings.check;
3448
3449 /* update the option flags according to the changes. we
3450 don't have per device options through sysctl yet,
3451 but we will have and then this will disappear. */
3452 cdrom_update_settings();
3453 }
3454
3455 return ret;
3456 }
3457
3458 /* Place files in /proc/sys/dev/cdrom */
3459 static ctl_table cdrom_table[] = {
3460 {
3461 .procname = "info",
3462 .data = &cdrom_sysctl_settings.info,
3463 .maxlen = CDROM_STR_SIZE,
3464 .mode = 0444,
3465 .proc_handler = &cdrom_sysctl_info,
3466 },
3467 {
3468 .procname = "autoclose",
3469 .data = &cdrom_sysctl_settings.autoclose,
3470 .maxlen = sizeof(int),
3471 .mode = 0644,
3472 .proc_handler = &cdrom_sysctl_handler,
3473 },
3474 {
3475 .procname = "autoeject",
3476 .data = &cdrom_sysctl_settings.autoeject,
3477 .maxlen = sizeof(int),
3478 .mode = 0644,
3479 .proc_handler = &cdrom_sysctl_handler,
3480 },
3481 {
3482 .procname = "debug",
3483 .data = &cdrom_sysctl_settings.debug,
3484 .maxlen = sizeof(int),
3485 .mode = 0644,
3486 .proc_handler = &cdrom_sysctl_handler,
3487 },
3488 {
3489 .procname = "lock",
3490 .data = &cdrom_sysctl_settings.lock,
3491 .maxlen = sizeof(int),
3492 .mode = 0644,
3493 .proc_handler = &cdrom_sysctl_handler,
3494 },
3495 {
3496 .procname = "check_media",
3497 .data = &cdrom_sysctl_settings.check,
3498 .maxlen = sizeof(int),
3499 .mode = 0644,
3500 .proc_handler = &cdrom_sysctl_handler
3501 },
3502 { .ctl_name = 0 }
3503 };
3504
3505 static ctl_table cdrom_cdrom_table[] = {
3506 {
3507 .ctl_name = DEV_CDROM,
3508 .procname = "cdrom",
3509 .maxlen = 0,
3510 .mode = 0555,
3511 .child = cdrom_table,
3512 },
3513 { .ctl_name = 0 }
3514 };
3515
3516 /* Make sure that /proc/sys/dev is there */
3517 static ctl_table cdrom_root_table[] = {
3518 {
3519 .ctl_name = CTL_DEV,
3520 .procname = "dev",
3521 .maxlen = 0,
3522 .mode = 0555,
3523 .child = cdrom_cdrom_table,
3524 },
3525 { .ctl_name = 0 }
3526 };
3527 static struct ctl_table_header *cdrom_sysctl_header;
3528
3529 static void cdrom_sysctl_register(void)
3530 {
3531 static int initialized;
3532
3533 if (initialized == 1)
3534 return;
3535
3536 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3537
3538 /* set the defaults */
3539 cdrom_sysctl_settings.autoclose = autoclose;
3540 cdrom_sysctl_settings.autoeject = autoeject;
3541 cdrom_sysctl_settings.debug = debug;
3542 cdrom_sysctl_settings.lock = lockdoor;
3543 cdrom_sysctl_settings.check = check_media_type;
3544
3545 initialized = 1;
3546 }
3547
3548 static void cdrom_sysctl_unregister(void)
3549 {
3550 if (cdrom_sysctl_header)
3551 unregister_sysctl_table(cdrom_sysctl_header);
3552 }
3553
3554 #else /* CONFIG_SYSCTL */
3555
3556 static void cdrom_sysctl_register(void)
3557 {
3558 }
3559
3560 static void cdrom_sysctl_unregister(void)
3561 {
3562 }
3563
3564 #endif /* CONFIG_SYSCTL */
3565
3566 static int __init cdrom_init(void)
3567 {
3568 cdrom_sysctl_register();
3569
3570 return 0;
3571 }
3572
3573 static void __exit cdrom_exit(void)
3574 {
3575 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3576 cdrom_sysctl_unregister();
3577 }
3578
3579 module_init(cdrom_init);
3580 module_exit(cdrom_exit);
3581 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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