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mm: migration: do not try to migrate unmapped anonymous pages
[linux-2.6/next.git] / drivers / cdrom / cdrom.c
blobe3749d0ba68b540149951ca572779dc9b8e979bf
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(generic_packet, CDC_GENERIC_PACKET);
412 cdi->mc_flags = 0;
413 cdo->n_minors = 0;
414 cdi->options = CDO_USE_FFLAGS;
415
416 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
417 cdi->options |= (int) CDO_AUTO_CLOSE;
418 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
419 cdi->options |= (int) CDO_AUTO_EJECT;
420 if (lockdoor==1)
421 cdi->options |= (int) CDO_LOCK;
422 if (check_media_type==1)
423 cdi->options |= (int) CDO_CHECK_TYPE;
424
425 if (CDROM_CAN(CDC_MRW_W))
426 cdi->exit = cdrom_mrw_exit;
427
428 if (cdi->disk)
429 cdi->cdda_method = CDDA_BPC_FULL;
430 else
431 cdi->cdda_method = CDDA_OLD;
432
433 if (!cdo->generic_packet)
434 cdo->generic_packet = cdrom_dummy_generic_packet;
435
436 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
437 mutex_lock(&cdrom_mutex);
438 list_add(&cdi->list, &cdrom_list);
439 mutex_unlock(&cdrom_mutex);
440 return 0;
441 }
442 #undef ENSURE
443
444 void unregister_cdrom(struct cdrom_device_info *cdi)
445 {
446 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
447
448 mutex_lock(&cdrom_mutex);
449 list_del(&cdi->list);
450 mutex_unlock(&cdrom_mutex);
451
452 if (cdi->exit)
453 cdi->exit(cdi);
454
455 cdi->ops->n_minors--;
456 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
457 }
458
459 int cdrom_get_media_event(struct cdrom_device_info *cdi,
460 struct media_event_desc *med)
461 {
462 struct packet_command cgc;
463 unsigned char buffer[8];
464 struct event_header *eh = (struct event_header *) buffer;
465
466 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
467 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
468 cgc.cmd[1] = 1; /* IMMED */
469 cgc.cmd[4] = 1 << 4; /* media event */
470 cgc.cmd[8] = sizeof(buffer);
471 cgc.quiet = 1;
472
473 if (cdi->ops->generic_packet(cdi, &cgc))
474 return 1;
475
476 if (be16_to_cpu(eh->data_len) < sizeof(*med))
477 return 1;
478
479 if (eh->nea || eh->notification_class != 0x4)
480 return 1;
481
482 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
483 return 0;
484 }
485
486 /*
487 * the first prototypes used 0x2c as the page code for the mrw mode page,
488 * subsequently this was changed to 0x03. probe the one used by this drive
489 */
490 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
491 {
492 struct packet_command cgc;
493 char buffer[16];
494
495 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
496
497 cgc.timeout = HZ;
498 cgc.quiet = 1;
499
500 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
501 cdi->mrw_mode_page = MRW_MODE_PC;
502 return 0;
503 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
504 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
505 return 0;
506 }
507
508 return 1;
509 }
510
511 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
512 {
513 struct packet_command cgc;
514 struct mrw_feature_desc *mfd;
515 unsigned char buffer[16];
516 int ret;
517
518 *write = 0;
519
520 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
521
522 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
523 cgc.cmd[3] = CDF_MRW;
524 cgc.cmd[8] = sizeof(buffer);
525 cgc.quiet = 1;
526
527 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
528 return ret;
529
530 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
531 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
532 return 1;
533 *write = mfd->write;
534
535 if ((ret = cdrom_mrw_probe_pc(cdi))) {
536 *write = 0;
537 return ret;
538 }
539
540 return 0;
541 }
542
543 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
544 {
545 struct packet_command cgc;
546 unsigned char buffer[12];
547 int ret;
548
549 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
550
551 /*
552 * FmtData bit set (bit 4), format type is 1
553 */
554 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
555 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
556 cgc.cmd[1] = (1 << 4) | 1;
557
558 cgc.timeout = 5 * 60 * HZ;
559
560 /*
561 * 4 byte format list header, 8 byte format list descriptor
562 */
563 buffer[1] = 1 << 1;
564 buffer[3] = 8;
565
566 /*
567 * nr_blocks field
568 */
569 buffer[4] = 0xff;
570 buffer[5] = 0xff;
571 buffer[6] = 0xff;
572 buffer[7] = 0xff;
573
574 buffer[8] = 0x24 << 2;
575 buffer[11] = cont;
576
577 ret = cdi->ops->generic_packet(cdi, &cgc);
578 if (ret)
579 printk(KERN_INFO "cdrom: bgformat failed\n");
580
581 return ret;
582 }
583
584 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
585 {
586 struct packet_command cgc;
587
588 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
589 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
590
591 /*
592 * Session = 1, Track = 0
593 */
594 cgc.cmd[1] = !!immed;
595 cgc.cmd[2] = 1 << 1;
596
597 cgc.timeout = 5 * 60 * HZ;
598
599 return cdi->ops->generic_packet(cdi, &cgc);
600 }
601
602 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
603 {
604 struct packet_command cgc;
605
606 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
607 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
608
609 cgc.timeout = 5 * 60 * HZ;
610
611 return cdi->ops->generic_packet(cdi, &cgc);
612 }
613
614 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
615 {
616 disc_information di;
617 int ret;
618
619 ret = cdrom_get_disc_info(cdi, &di);
620 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
621 return 1;
622
623 ret = 0;
624 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
625 printk(KERN_INFO "cdrom: issuing MRW back ground "
626 "format suspend\n");
627 ret = cdrom_mrw_bgformat_susp(cdi, 0);
628 }
629
630 if (!ret && cdi->media_written)
631 ret = cdrom_flush_cache(cdi);
632
633 return ret;
634 }
635
636 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
637 {
638 struct packet_command cgc;
639 struct mode_page_header *mph;
640 char buffer[16];
641 int ret, offset, size;
642
643 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
644
645 cgc.buffer = buffer;
646 cgc.buflen = sizeof(buffer);
647
648 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
649 return ret;
650
651 mph = (struct mode_page_header *) buffer;
652 offset = be16_to_cpu(mph->desc_length);
653 size = be16_to_cpu(mph->mode_data_length) + 2;
654
655 buffer[offset + 3] = space;
656 cgc.buflen = size;
657
658 if ((ret = cdrom_mode_select(cdi, &cgc)))
659 return ret;
660
661 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
662 return 0;
663 }
664
665 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
666 struct rwrt_feature_desc *rfd)
667 {
668 struct packet_command cgc;
669 char buffer[24];
670 int ret;
671
672 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
673
674 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
675 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
676 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
677 cgc.quiet = 1;
678
679 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
680 return ret;
681
682 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
683 return 0;
684 }
685
686 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
687 {
688 struct packet_command cgc;
689 char buffer[16];
690 __be16 *feature_code;
691 int ret;
692
693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
696 cgc.cmd[3] = CDF_HWDM;
697 cgc.cmd[8] = sizeof(buffer);
698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 return ret;
702
703 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
704 if (be16_to_cpu(*feature_code) == CDF_HWDM)
705 return 0;
706
707 return 1;
708 }
709
710
711 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
712 {
713 struct rwrt_feature_desc rfd;
714 int ret;
715
716 *write = 0;
717
718 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
719 return ret;
720
721 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
722 *write = 1;
723
724 return 0;
725 }
726
727 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
728 {
729 disc_information di;
730 int ret;
731
732 ret = cdrom_get_disc_info(cdi, &di);
733 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
734 return -1;
735
736 return di.erasable;
737 }
738
739 /*
740 * FIXME: check RO bit
741 */
742 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
743 {
744 int ret = cdrom_media_erasable(cdi);
745
746 /*
747 * allow writable open if media info read worked and media is
748 * erasable, _or_ if it fails since not all drives support it
749 */
750 if (!ret)
751 return 1;
752
753 return 0;
754 }
755
756 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
757 {
758 disc_information di;
759 int ret;
760
761 /*
762 * always reset to DMA lba space on open
763 */
764 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
765 printk(KERN_ERR "cdrom: failed setting lba address space\n");
766 return 1;
767 }
768
769 ret = cdrom_get_disc_info(cdi, &di);
770 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
771 return 1;
772
773 if (!di.erasable)
774 return 1;
775
776 /*
777 * mrw_status
778 * 0 - not MRW formatted
779 * 1 - MRW bgformat started, but not running or complete
780 * 2 - MRW bgformat in progress
781 * 3 - MRW formatting complete
782 */
783 ret = 0;
784 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
785 mrw_format_status[di.mrw_status]);
786 if (!di.mrw_status)
787 ret = 1;
788 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
789 mrw_format_restart)
790 ret = cdrom_mrw_bgformat(cdi, 1);
791
792 return ret;
793 }
794
795 static int mo_open_write(struct cdrom_device_info *cdi)
796 {
797 struct packet_command cgc;
798 char buffer[255];
799 int ret;
800
801 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
802 cgc.quiet = 1;
803
804 /*
805 * obtain write protect information as per
806 * drivers/scsi/sd.c:sd_read_write_protect_flag
807 */
808
809 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
810 if (ret)
811 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
812 if (ret) {
813 cgc.buflen = 255;
814 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
815 }
816
817 /* drive gave us no info, let the user go ahead */
818 if (ret)
819 return 0;
820
821 return buffer[3] & 0x80;
822 }
823
824 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
825 {
826 struct rwrt_feature_desc rfd;
827 int ret;
828
829 if ((ret = cdrom_has_defect_mgt(cdi)))
830 return ret;
831
832 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
833 return ret;
834 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
835 ret = !rfd.curr;
836
837 cdinfo(CD_OPEN, "can open for random write\n");
838 return ret;
839 }
840
841 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
842 {
843 struct packet_command cgc;
844 char buffer[32];
845 int ret, mmc3_profile;
846
847 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
848
849 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
850 cgc.cmd[1] = 0;
851 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
852 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
853 cgc.quiet = 1;
854
855 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
856 mmc3_profile = 0xffff;
857 else
858 mmc3_profile = (buffer[6] << 8) | buffer[7];
859
860 cdi->mmc3_profile = mmc3_profile;
861 }
862
863 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
864 {
865 switch (cdi->mmc3_profile) {
866 case 0x12: /* DVD-RAM */
867 case 0x1A: /* DVD+RW */
868 return 0;
869 default:
870 return 1;
871 }
872 }
873
874 /*
875 * returns 0 for ok to open write, non-0 to disallow
876 */
877 static int cdrom_open_write(struct cdrom_device_info *cdi)
878 {
879 int mrw, mrw_write, ram_write;
880 int ret = 1;
881
882 mrw = 0;
883 if (!cdrom_is_mrw(cdi, &mrw_write))
884 mrw = 1;
885
886 if (CDROM_CAN(CDC_MO_DRIVE))
887 ram_write = 1;
888 else
889 (void) cdrom_is_random_writable(cdi, &ram_write);
890
891 if (mrw)
892 cdi->mask &= ~CDC_MRW;
893 else
894 cdi->mask |= CDC_MRW;
895
896 if (mrw_write)
897 cdi->mask &= ~CDC_MRW_W;
898 else
899 cdi->mask |= CDC_MRW_W;
900
901 if (ram_write)
902 cdi->mask &= ~CDC_RAM;
903 else
904 cdi->mask |= CDC_RAM;
905
906 if (CDROM_CAN(CDC_MRW_W))
907 ret = cdrom_mrw_open_write(cdi);
908 else if (CDROM_CAN(CDC_DVD_RAM))
909 ret = cdrom_dvdram_open_write(cdi);
910 else if (CDROM_CAN(CDC_RAM) &&
911 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
912 ret = cdrom_ram_open_write(cdi);
913 else if (CDROM_CAN(CDC_MO_DRIVE))
914 ret = mo_open_write(cdi);
915 else if (!cdrom_is_dvd_rw(cdi))
916 ret = 0;
917
918 return ret;
919 }
920
921 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
922 {
923 struct packet_command cgc;
924
925 if (cdi->mmc3_profile != 0x1a) {
926 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
927 return;
928 }
929
930 if (!cdi->media_written) {
931 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
932 return;
933 }
934
935 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
936 cdi->name);
937
938 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
939 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
940 cgc.timeout = 30*HZ;
941 cdi->ops->generic_packet(cdi, &cgc);
942
943 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
944 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
945 cgc.timeout = 3000*HZ;
946 cgc.quiet = 1;
947 cdi->ops->generic_packet(cdi, &cgc);
948
949 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
950 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
951 cgc.cmd[2] = 2; /* Close session */
952 cgc.quiet = 1;
953 cgc.timeout = 3000*HZ;
954 cdi->ops->generic_packet(cdi, &cgc);
955
956 cdi->media_written = 0;
957 }
958
959 static int cdrom_close_write(struct cdrom_device_info *cdi)
960 {
961 #if 0
962 return cdrom_flush_cache(cdi);
963 #else
964 return 0;
965 #endif
966 }
967
968 /* We use the open-option O_NONBLOCK to indicate that the
969 * purpose of opening is only for subsequent ioctl() calls; no device
970 * integrity checks are performed.
971 *
972 * We hope that all cd-player programs will adopt this convention. It
973 * is in their own interest: device control becomes a lot easier
974 * this way.
975 */
976 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode)
977 {
978 int ret;
979
980 cdinfo(CD_OPEN, "entering cdrom_open\n");
981
982 /* if this was a O_NONBLOCK open and we should honor the flags,
983 * do a quick open without drive/disc integrity checks. */
984 cdi->use_count++;
985 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
986 ret = cdi->ops->open(cdi, 1);
987 } else {
988 ret = open_for_data(cdi);
989 if (ret)
990 goto err;
991 cdrom_mmc3_profile(cdi);
992 if (mode & FMODE_WRITE) {
993 ret = -EROFS;
994 if (cdrom_open_write(cdi))
995 goto err_release;
996 if (!CDROM_CAN(CDC_RAM))
997 goto err_release;
998 ret = 0;
999 cdi->media_written = 0;
1000 }
1001 }
1002
1003 if (ret)
1004 goto err;
1005
1006 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1007 cdi->name, cdi->use_count);
1008 /* Do this on open. Don't wait for mount, because they might
1009 not be mounting, but opening with O_NONBLOCK */
1010 check_disk_change(bdev);
1011 return 0;
1012 err_release:
1013 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1014 cdi->ops->lock_door(cdi, 0);
1015 cdinfo(CD_OPEN, "door unlocked.\n");
1016 }
1017 cdi->ops->release(cdi);
1018 err:
1019 cdi->use_count--;
1020 return ret;
1021 }
1022
1023 static
1024 int open_for_data(struct cdrom_device_info * cdi)
1025 {
1026 int ret;
1027 struct cdrom_device_ops *cdo = cdi->ops;
1028 tracktype tracks;
1029 cdinfo(CD_OPEN, "entering open_for_data\n");
1030 /* Check if the driver can report drive status. If it can, we
1031 can do clever things. If it can't, well, we at least tried! */
1032 if (cdo->drive_status != NULL) {
1033 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1034 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1035 if (ret == CDS_TRAY_OPEN) {
1036 cdinfo(CD_OPEN, "the tray is open...\n");
1037 /* can/may i close it? */
1038 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1039 cdi->options & CDO_AUTO_CLOSE) {
1040 cdinfo(CD_OPEN, "trying to close the tray.\n");
1041 ret=cdo->tray_move(cdi,0);
1042 if (ret) {
1043 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1044 /* Ignore the error from the low
1045 level driver. We don't care why it
1046 couldn't close the tray. We only care
1047 that there is no disc in the drive,
1048 since that is the _REAL_ problem here.*/
1049 ret=-ENOMEDIUM;
1050 goto clean_up_and_return;
1051 }
1052 } else {
1053 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1054 ret=-ENOMEDIUM;
1055 goto clean_up_and_return;
1056 }
1057 /* Ok, the door should be closed now.. Check again */
1058 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1059 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1060 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1061 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1062 ret=-ENOMEDIUM;
1063 goto clean_up_and_return;
1064 }
1065 cdinfo(CD_OPEN, "the tray is now closed.\n");
1066 }
1067 /* the door should be closed now, check for the disc */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if (ret!=CDS_DISC_OK) {
1070 ret = -ENOMEDIUM;
1071 goto clean_up_and_return;
1072 }
1073 }
1074 cdrom_count_tracks(cdi, &tracks);
1075 if (tracks.error == CDS_NO_DISC) {
1076 cdinfo(CD_OPEN, "bummer. no disc.\n");
1077 ret=-ENOMEDIUM;
1078 goto clean_up_and_return;
1079 }
1080 /* CD-Players which don't use O_NONBLOCK, workman
1081 * for example, need bit CDO_CHECK_TYPE cleared! */
1082 if (tracks.data==0) {
1083 if (cdi->options & CDO_CHECK_TYPE) {
1084 /* give people a warning shot, now that CDO_CHECK_TYPE
1085 is the default case! */
1086 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1087 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1088 (unsigned int)task_pid_nr(current));
1089 ret=-EMEDIUMTYPE;
1090 goto clean_up_and_return;
1091 }
1092 else {
1093 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1094 }
1095 }
1096
1097 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1098
1099 /* all seems well, we can open the device */
1100 ret = cdo->open(cdi, 0); /* open for data */
1101 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1102 /* After all this careful checking, we shouldn't have problems
1103 opening the device, but we don't want the device locked if
1104 this somehow fails... */
1105 if (ret) {
1106 cdinfo(CD_OPEN, "open device failed.\n");
1107 goto clean_up_and_return;
1108 }
1109 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1110 cdo->lock_door(cdi, 1);
1111 cdinfo(CD_OPEN, "door locked.\n");
1112 }
1113 cdinfo(CD_OPEN, "device opened successfully.\n");
1114 return ret;
1115
1116 /* Something failed. Try to unlock the drive, because some drivers
1117 (notably ide-cd) lock the drive after every command. This produced
1118 a nasty bug where after mount failed, the drive would remain locked!
1119 This ensures that the drive gets unlocked after a mount fails. This
1120 is a goto to avoid bloating the driver with redundant code. */
1121 clean_up_and_return:
1122 cdinfo(CD_OPEN, "open failed.\n");
1123 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1124 cdo->lock_door(cdi, 0);
1125 cdinfo(CD_OPEN, "door unlocked.\n");
1126 }
1127 return ret;
1128 }
1129
1130 /* This code is similar to that in open_for_data. The routine is called
1131 whenever an audio play operation is requested.
1132 */
1133 static int check_for_audio_disc(struct cdrom_device_info * cdi,
1134 struct cdrom_device_ops * cdo)
1135 {
1136 int ret;
1137 tracktype tracks;
1138 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1139 if (!(cdi->options & CDO_CHECK_TYPE))
1140 return 0;
1141 if (cdo->drive_status != NULL) {
1142 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1143 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1144 if (ret == CDS_TRAY_OPEN) {
1145 cdinfo(CD_OPEN, "the tray is open...\n");
1146 /* can/may i close it? */
1147 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1148 cdi->options & CDO_AUTO_CLOSE) {
1149 cdinfo(CD_OPEN, "trying to close the tray.\n");
1150 ret=cdo->tray_move(cdi,0);
1151 if (ret) {
1152 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1153 /* Ignore the error from the low
1154 level driver. We don't care why it
1155 couldn't close the tray. We only care
1156 that there is no disc in the drive,
1157 since that is the _REAL_ problem here.*/
1158 return -ENOMEDIUM;
1159 }
1160 } else {
1161 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1162 return -ENOMEDIUM;
1163 }
1164 /* Ok, the door should be closed now.. Check again */
1165 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1166 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1167 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1168 return -ENOMEDIUM;
1169 }
1170 if (ret!=CDS_DISC_OK) {
1171 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1172 return -EIO;
1173 }
1174 cdinfo(CD_OPEN, "the tray is now closed.\n");
1175 }
1176 }
1177 cdrom_count_tracks(cdi, &tracks);
1178 if (tracks.error)
1179 return(tracks.error);
1180
1181 if (tracks.audio==0)
1182 return -EMEDIUMTYPE;
1183
1184 return 0;
1185 }
1186
1187 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1188 {
1189 struct cdrom_device_ops *cdo = cdi->ops;
1190 int opened_for_data;
1191
1192 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1193
1194 if (cdi->use_count > 0)
1195 cdi->use_count--;
1196
1197 if (cdi->use_count == 0) {
1198 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1199 cdrom_dvd_rw_close_write(cdi);
1200
1201 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1202 cdinfo(CD_CLOSE, "Unlocking door!\n");
1203 cdo->lock_door(cdi, 0);
1204 }
1205 }
1206
1207 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1208 !(mode & FMODE_NDELAY);
1209
1210 /*
1211 * flush cache on last write release
1212 */
1213 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1214 cdrom_close_write(cdi);
1215
1216 cdo->release(cdi);
1217 if (cdi->use_count == 0) { /* last process that closes dev*/
1218 if (opened_for_data &&
1219 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1220 cdo->tray_move(cdi, 1);
1221 }
1222 }
1223
1224 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1225 struct cdrom_changer_info *buf)
1226 {
1227 struct packet_command cgc;
1228 struct cdrom_device_ops *cdo = cdi->ops;
1229 int length;
1230
1231 /*
1232 * Sanyo changer isn't spec compliant (doesn't use regular change
1233 * LOAD_UNLOAD command, and it doesn't implement the mech status
1234 * command below
1235 */
1236 if (cdi->sanyo_slot) {
1237 buf->hdr.nslots = 3;
1238 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1239 for (length = 0; length < 3; length++) {
1240 buf->slots[length].disc_present = 1;
1241 buf->slots[length].change = 0;
1242 }
1243 return 0;
1244 }
1245
1246 length = sizeof(struct cdrom_mechstat_header) +
1247 cdi->capacity * sizeof(struct cdrom_slot);
1248
1249 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1250 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1251 cgc.cmd[8] = (length >> 8) & 0xff;
1252 cgc.cmd[9] = length & 0xff;
1253 return cdo->generic_packet(cdi, &cgc);
1254 }
1255
1256 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1257 {
1258 struct cdrom_changer_info *info;
1259 int ret;
1260
1261 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1262 if (cdi->sanyo_slot)
1263 return CDS_NO_INFO;
1264
1265 info = kmalloc(sizeof(*info), GFP_KERNEL);
1266 if (!info)
1267 return -ENOMEM;
1268
1269 if ((ret = cdrom_read_mech_status(cdi, info)))
1270 goto out_free;
1271
1272 if (info->slots[slot].disc_present)
1273 ret = CDS_DISC_OK;
1274 else
1275 ret = CDS_NO_DISC;
1276
1277 out_free:
1278 kfree(info);
1279 return ret;
1280 }
1281
1282 /* Return the number of slots for an ATAPI/SCSI cdrom,
1283 * return 1 if not a changer.
1284 */
1285 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1286 {
1287 int status;
1288 int nslots = 1;
1289 struct cdrom_changer_info *info;
1290
1291 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1292 /* cdrom_read_mech_status requires a valid value for capacity: */
1293 cdi->capacity = 0;
1294
1295 info = kmalloc(sizeof(*info), GFP_KERNEL);
1296 if (!info)
1297 return -ENOMEM;
1298
1299 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1300 nslots = info->hdr.nslots;
1301
1302 kfree(info);
1303 return nslots;
1304 }
1305
1306
1307 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1308 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1309 {
1310 struct packet_command cgc;
1311
1312 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1313 if (cdi->sanyo_slot && slot < 0)
1314 return 0;
1315
1316 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1317 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1318 cgc.cmd[4] = 2 + (slot >= 0);
1319 cgc.cmd[8] = slot;
1320 cgc.timeout = 60 * HZ;
1321
1322 /* The Sanyo 3 CD changer uses byte 7 of the
1323 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1324 using the GPCMD_LOAD_UNLOAD opcode. */
1325 if (cdi->sanyo_slot && -1 < slot) {
1326 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1327 cgc.cmd[7] = slot;
1328 cgc.cmd[4] = cgc.cmd[8] = 0;
1329 cdi->sanyo_slot = slot ? slot : 3;
1330 }
1331
1332 return cdi->ops->generic_packet(cdi, &cgc);
1333 }
1334
1335 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1336 {
1337 struct cdrom_changer_info *info;
1338 int curslot;
1339 int ret;
1340
1341 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1342 if (!CDROM_CAN(CDC_SELECT_DISC))
1343 return -EDRIVE_CANT_DO_THIS;
1344
1345 (void) cdi->ops->media_changed(cdi, slot);
1346
1347 if (slot == CDSL_NONE) {
1348 /* set media changed bits, on both queues */
1349 cdi->mc_flags = 0x3;
1350 return cdrom_load_unload(cdi, -1);
1351 }
1352
1353 info = kmalloc(sizeof(*info), GFP_KERNEL);
1354 if (!info)
1355 return -ENOMEM;
1356
1357 if ((ret = cdrom_read_mech_status(cdi, info))) {
1358 kfree(info);
1359 return ret;
1360 }
1361
1362 curslot = info->hdr.curslot;
1363 kfree(info);
1364
1365 if (cdi->use_count > 1 || keeplocked) {
1366 if (slot == CDSL_CURRENT) {
1367 return curslot;
1368 } else {
1369 return -EBUSY;
1370 }
1371 }
1372
1373 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1374 which is useful if it had been previously unloaded.
1375 Whether it can or not, it returns the current slot.
1376 Similarly, if slot happens to be the current one, we still
1377 try and load it. */
1378 if (slot == CDSL_CURRENT)
1379 slot = curslot;
1380
1381 /* set media changed bits on both queues */
1382 cdi->mc_flags = 0x3;
1383 if ((ret = cdrom_load_unload(cdi, slot)))
1384 return ret;
1385
1386 return slot;
1387 }
1388
1389 /* We want to make media_changed accessible to the user through an
1390 * ioctl. The main problem now is that we must double-buffer the
1391 * low-level implementation, to assure that the VFS and the user both
1392 * see a medium change once.
1393 */
1394
1395 static
1396 int media_changed(struct cdrom_device_info *cdi, int queue)
1397 {
1398 unsigned int mask = (1 << (queue & 1));
1399 int ret = !!(cdi->mc_flags & mask);
1400
1401 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1402 return ret;
1403 /* changed since last call? */
1404 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1405 cdi->mc_flags = 0x3; /* set bit on both queues */
1406 ret |= 1;
1407 cdi->media_written = 0;
1408 }
1409 cdi->mc_flags &= ~mask; /* clear bit */
1410 return ret;
1411 }
1412
1413 int cdrom_media_changed(struct cdrom_device_info *cdi)
1414 {
1415 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1416 * Returning "0" is always safe (media hasn't been changed). Do that
1417 * if the low-level cdrom driver dosn't support media changed. */
1418 if (cdi == NULL || cdi->ops->media_changed == NULL)
1419 return 0;
1420 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1421 return 0;
1422 return media_changed(cdi, 0);
1423 }
1424
1425 /* badly broken, I know. Is due for a fixup anytime. */
1426 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1427 {
1428 struct cdrom_tochdr header;
1429 struct cdrom_tocentry entry;
1430 int ret, i;
1431 tracks->data=0;
1432 tracks->audio=0;
1433 tracks->cdi=0;
1434 tracks->xa=0;
1435 tracks->error=0;
1436 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1437 /* Grab the TOC header so we can see how many tracks there are */
1438 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1439 if (ret == -ENOMEDIUM)
1440 tracks->error = CDS_NO_DISC;
1441 else
1442 tracks->error = CDS_NO_INFO;
1443 return;
1444 }
1445 /* check what type of tracks are on this disc */
1446 entry.cdte_format = CDROM_MSF;
1447 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1448 entry.cdte_track = i;
1449 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1454 if (entry.cdte_format == 0x10)
1455 tracks->cdi++;
1456 else if (entry.cdte_format == 0x20)
1457 tracks->xa++;
1458 else
1459 tracks->data++;
1460 } else
1461 tracks->audio++;
1462 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1463 i, entry.cdte_format, entry.cdte_ctrl);
1464 }
1465 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1466 header.cdth_trk1, tracks->audio, tracks->data,
1467 tracks->cdi, tracks->xa);
1468 }
1469
1470 /* Requests to the low-level drivers will /always/ be done in the
1471 following format convention:
1472
1473 CDROM_LBA: all data-related requests.
1474 CDROM_MSF: all audio-related requests.
1475
1476 However, a low-level implementation is allowed to refuse this
1477 request, and return information in its own favorite format.
1478
1479 It doesn't make sense /at all/ to ask for a play_audio in LBA
1480 format, or ask for multi-session info in MSF format. However, for
1481 backward compatibility these format requests will be satisfied, but
1482 the requests to the low-level drivers will be sanitized in the more
1483 meaningful format indicated above.
1484 */
1485
1486 static
1487 void sanitize_format(union cdrom_addr *addr,
1488 u_char * curr, u_char requested)
1489 {
1490 if (*curr == requested)
1491 return; /* nothing to be done! */
1492 if (requested == CDROM_LBA) {
1493 addr->lba = (int) addr->msf.frame +
1494 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1495 } else { /* CDROM_MSF */
1496 int lba = addr->lba;
1497 addr->msf.frame = lba % 75;
1498 lba /= 75;
1499 lba += 2;
1500 addr->msf.second = lba % 60;
1501 addr->msf.minute = lba / 60;
1502 }
1503 *curr = requested;
1504 }
1505
1506 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1507 int type)
1508 {
1509 memset(cgc, 0, sizeof(struct packet_command));
1510 if (buf)
1511 memset(buf, 0, len);
1512 cgc->buffer = (char *) buf;
1513 cgc->buflen = len;
1514 cgc->data_direction = type;
1515 cgc->timeout = CDROM_DEF_TIMEOUT;
1516 }
1517
1518 /* DVD handling */
1519
1520 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1521 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1522
1523 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1524 {
1525 cgc->cmd[0] = GPCMD_REPORT_KEY;
1526 cgc->cmd[10] = type | (agid << 6);
1527 switch (type) {
1528 case 0: case 8: case 5: {
1529 cgc->buflen = 8;
1530 break;
1531 }
1532 case 1: {
1533 cgc->buflen = 16;
1534 break;
1535 }
1536 case 2: case 4: {
1537 cgc->buflen = 12;
1538 break;
1539 }
1540 }
1541 cgc->cmd[9] = cgc->buflen;
1542 cgc->data_direction = CGC_DATA_READ;
1543 }
1544
1545 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1546 {
1547 cgc->cmd[0] = GPCMD_SEND_KEY;
1548 cgc->cmd[10] = type | (agid << 6);
1549 switch (type) {
1550 case 1: {
1551 cgc->buflen = 16;
1552 break;
1553 }
1554 case 3: {
1555 cgc->buflen = 12;
1556 break;
1557 }
1558 case 6: {
1559 cgc->buflen = 8;
1560 break;
1561 }
1562 }
1563 cgc->cmd[9] = cgc->buflen;
1564 cgc->data_direction = CGC_DATA_WRITE;
1565 }
1566
1567 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1568 {
1569 int ret;
1570 u_char buf[20];
1571 struct packet_command cgc;
1572 struct cdrom_device_ops *cdo = cdi->ops;
1573 rpc_state_t rpc_state;
1574
1575 memset(buf, 0, sizeof(buf));
1576 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1577
1578 switch (ai->type) {
1579 /* LU data send */
1580 case DVD_LU_SEND_AGID:
1581 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1582 cgc.quiet = 1;
1583 setup_report_key(&cgc, ai->lsa.agid, 0);
1584
1585 if ((ret = cdo->generic_packet(cdi, &cgc)))
1586 return ret;
1587
1588 ai->lsa.agid = buf[7] >> 6;
1589 /* Returning data, let host change state */
1590 break;
1591
1592 case DVD_LU_SEND_KEY1:
1593 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1594 setup_report_key(&cgc, ai->lsk.agid, 2);
1595
1596 if ((ret = cdo->generic_packet(cdi, &cgc)))
1597 return ret;
1598
1599 copy_key(ai->lsk.key, &buf[4]);
1600 /* Returning data, let host change state */
1601 break;
1602
1603 case DVD_LU_SEND_CHALLENGE:
1604 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1605 setup_report_key(&cgc, ai->lsc.agid, 1);
1606
1607 if ((ret = cdo->generic_packet(cdi, &cgc)))
1608 return ret;
1609
1610 copy_chal(ai->lsc.chal, &buf[4]);
1611 /* Returning data, let host change state */
1612 break;
1613
1614 /* Post-auth key */
1615 case DVD_LU_SEND_TITLE_KEY:
1616 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1617 cgc.quiet = 1;
1618 setup_report_key(&cgc, ai->lstk.agid, 4);
1619 cgc.cmd[5] = ai->lstk.lba;
1620 cgc.cmd[4] = ai->lstk.lba >> 8;
1621 cgc.cmd[3] = ai->lstk.lba >> 16;
1622 cgc.cmd[2] = ai->lstk.lba >> 24;
1623
1624 if ((ret = cdo->generic_packet(cdi, &cgc)))
1625 return ret;
1626
1627 ai->lstk.cpm = (buf[4] >> 7) & 1;
1628 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1629 ai->lstk.cgms = (buf[4] >> 4) & 3;
1630 copy_key(ai->lstk.title_key, &buf[5]);
1631 /* Returning data, let host change state */
1632 break;
1633
1634 case DVD_LU_SEND_ASF:
1635 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1636 setup_report_key(&cgc, ai->lsasf.agid, 5);
1637
1638 if ((ret = cdo->generic_packet(cdi, &cgc)))
1639 return ret;
1640
1641 ai->lsasf.asf = buf[7] & 1;
1642 break;
1643
1644 /* LU data receive (LU changes state) */
1645 case DVD_HOST_SEND_CHALLENGE:
1646 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1647 setup_send_key(&cgc, ai->hsc.agid, 1);
1648 buf[1] = 0xe;
1649 copy_chal(&buf[4], ai->hsc.chal);
1650
1651 if ((ret = cdo->generic_packet(cdi, &cgc)))
1652 return ret;
1653
1654 ai->type = DVD_LU_SEND_KEY1;
1655 break;
1656
1657 case DVD_HOST_SEND_KEY2:
1658 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1659 setup_send_key(&cgc, ai->hsk.agid, 3);
1660 buf[1] = 0xa;
1661 copy_key(&buf[4], ai->hsk.key);
1662
1663 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1664 ai->type = DVD_AUTH_FAILURE;
1665 return ret;
1666 }
1667 ai->type = DVD_AUTH_ESTABLISHED;
1668 break;
1669
1670 /* Misc */
1671 case DVD_INVALIDATE_AGID:
1672 cgc.quiet = 1;
1673 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1674 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
1676 return ret;
1677 break;
1678
1679 /* Get region settings */
1680 case DVD_LU_SEND_RPC_STATE:
1681 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1682 setup_report_key(&cgc, 0, 8);
1683 memset(&rpc_state, 0, sizeof(rpc_state_t));
1684 cgc.buffer = (char *) &rpc_state;
1685
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
1687 return ret;
1688
1689 ai->lrpcs.type = rpc_state.type_code;
1690 ai->lrpcs.vra = rpc_state.vra;
1691 ai->lrpcs.ucca = rpc_state.ucca;
1692 ai->lrpcs.region_mask = rpc_state.region_mask;
1693 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1694 break;
1695
1696 /* Set region settings */
1697 case DVD_HOST_SEND_RPC_STATE:
1698 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1699 setup_send_key(&cgc, 0, 6);
1700 buf[1] = 6;
1701 buf[4] = ai->hrpcs.pdrc;
1702
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
1704 return ret;
1705 break;
1706
1707 default:
1708 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1709 return -ENOTTY;
1710 }
1711
1712 return 0;
1713 }
1714
1715 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1716 struct packet_command *cgc)
1717 {
1718 unsigned char buf[21], *base;
1719 struct dvd_layer *layer;
1720 struct cdrom_device_ops *cdo = cdi->ops;
1721 int ret, layer_num = s->physical.layer_num;
1722
1723 if (layer_num >= DVD_LAYERS)
1724 return -EINVAL;
1725
1726 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1727 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1728 cgc->cmd[6] = layer_num;
1729 cgc->cmd[7] = s->type;
1730 cgc->cmd[9] = cgc->buflen & 0xff;
1731
1732 /*
1733 * refrain from reporting errors on non-existing layers (mainly)
1734 */
1735 cgc->quiet = 1;
1736
1737 ret = cdo->generic_packet(cdi, cgc);
1738 if (ret)
1739 return ret;
1740
1741 base = &buf[4];
1742 layer = &s->physical.layer[layer_num];
1743
1744 /*
1745 * place the data... really ugly, but at least we won't have to
1746 * worry about endianess in userspace.
1747 */
1748 memset(layer, 0, sizeof(*layer));
1749 layer->book_version = base[0] & 0xf;
1750 layer->book_type = base[0] >> 4;
1751 layer->min_rate = base[1] & 0xf;
1752 layer->disc_size = base[1] >> 4;
1753 layer->layer_type = base[2] & 0xf;
1754 layer->track_path = (base[2] >> 4) & 1;
1755 layer->nlayers = (base[2] >> 5) & 3;
1756 layer->track_density = base[3] & 0xf;
1757 layer->linear_density = base[3] >> 4;
1758 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1759 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1760 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1761 layer->bca = base[16] >> 7;
1762
1763 return 0;
1764 }
1765
1766 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1767 struct packet_command *cgc)
1768 {
1769 int ret;
1770 u_char buf[8];
1771 struct cdrom_device_ops *cdo = cdi->ops;
1772
1773 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1774 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1775 cgc->cmd[6] = s->copyright.layer_num;
1776 cgc->cmd[7] = s->type;
1777 cgc->cmd[8] = cgc->buflen >> 8;
1778 cgc->cmd[9] = cgc->buflen & 0xff;
1779
1780 ret = cdo->generic_packet(cdi, cgc);
1781 if (ret)
1782 return ret;
1783
1784 s->copyright.cpst = buf[4];
1785 s->copyright.rmi = buf[5];
1786
1787 return 0;
1788 }
1789
1790 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1791 struct packet_command *cgc)
1792 {
1793 int ret, size;
1794 u_char *buf;
1795 struct cdrom_device_ops *cdo = cdi->ops;
1796
1797 size = sizeof(s->disckey.value) + 4;
1798
1799 buf = kmalloc(size, GFP_KERNEL);
1800 if (!buf)
1801 return -ENOMEM;
1802
1803 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1804 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1805 cgc->cmd[7] = s->type;
1806 cgc->cmd[8] = size >> 8;
1807 cgc->cmd[9] = size & 0xff;
1808 cgc->cmd[10] = s->disckey.agid << 6;
1809
1810 ret = cdo->generic_packet(cdi, cgc);
1811 if (!ret)
1812 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1813
1814 kfree(buf);
1815 return ret;
1816 }
1817
1818 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1819 struct packet_command *cgc)
1820 {
1821 int ret, size = 4 + 188;
1822 u_char *buf;
1823 struct cdrom_device_ops *cdo = cdi->ops;
1824
1825 buf = kmalloc(size, GFP_KERNEL);
1826 if (!buf)
1827 return -ENOMEM;
1828
1829 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1830 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1831 cgc->cmd[7] = s->type;
1832 cgc->cmd[9] = cgc->buflen & 0xff;
1833
1834 ret = cdo->generic_packet(cdi, cgc);
1835 if (ret)
1836 goto out;
1837
1838 s->bca.len = buf[0] << 8 | buf[1];
1839 if (s->bca.len < 12 || s->bca.len > 188) {
1840 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1841 ret = -EIO;
1842 goto out;
1843 }
1844 memcpy(s->bca.value, &buf[4], s->bca.len);
1845 ret = 0;
1846 out:
1847 kfree(buf);
1848 return ret;
1849 }
1850
1851 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1852 struct packet_command *cgc)
1853 {
1854 int ret = 0, size;
1855 u_char *buf;
1856 struct cdrom_device_ops *cdo = cdi->ops;
1857
1858 size = sizeof(s->manufact.value) + 4;
1859
1860 buf = kmalloc(size, GFP_KERNEL);
1861 if (!buf)
1862 return -ENOMEM;
1863
1864 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1865 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1866 cgc->cmd[7] = s->type;
1867 cgc->cmd[8] = size >> 8;
1868 cgc->cmd[9] = size & 0xff;
1869
1870 ret = cdo->generic_packet(cdi, cgc);
1871 if (ret)
1872 goto out;
1873
1874 s->manufact.len = buf[0] << 8 | buf[1];
1875 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1876 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1877 " (%d)\n", s->manufact.len);
1878 ret = -EIO;
1879 } else {
1880 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1881 }
1882
1883 out:
1884 kfree(buf);
1885 return ret;
1886 }
1887
1888 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1889 struct packet_command *cgc)
1890 {
1891 switch (s->type) {
1892 case DVD_STRUCT_PHYSICAL:
1893 return dvd_read_physical(cdi, s, cgc);
1894
1895 case DVD_STRUCT_COPYRIGHT:
1896 return dvd_read_copyright(cdi, s, cgc);
1897
1898 case DVD_STRUCT_DISCKEY:
1899 return dvd_read_disckey(cdi, s, cgc);
1900
1901 case DVD_STRUCT_BCA:
1902 return dvd_read_bca(cdi, s, cgc);
1903
1904 case DVD_STRUCT_MANUFACT:
1905 return dvd_read_manufact(cdi, s, cgc);
1906
1907 default:
1908 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1909 s->type);
1910 return -EINVAL;
1911 }
1912 }
1913
1914 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1915 struct packet_command *cgc,
1916 int page_code, int page_control)
1917 {
1918 struct cdrom_device_ops *cdo = cdi->ops;
1919
1920 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1921
1922 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1923 cgc->cmd[2] = page_code | (page_control << 6);
1924 cgc->cmd[7] = cgc->buflen >> 8;
1925 cgc->cmd[8] = cgc->buflen & 0xff;
1926 cgc->data_direction = CGC_DATA_READ;
1927 return cdo->generic_packet(cdi, cgc);
1928 }
1929
1930 int cdrom_mode_select(struct cdrom_device_info *cdi,
1931 struct packet_command *cgc)
1932 {
1933 struct cdrom_device_ops *cdo = cdi->ops;
1934
1935 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1936 memset(cgc->buffer, 0, 2);
1937 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1938 cgc->cmd[1] = 0x10; /* PF */
1939 cgc->cmd[7] = cgc->buflen >> 8;
1940 cgc->cmd[8] = cgc->buflen & 0xff;
1941 cgc->data_direction = CGC_DATA_WRITE;
1942 return cdo->generic_packet(cdi, cgc);
1943 }
1944
1945 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1946 struct cdrom_subchnl *subchnl, int mcn)
1947 {
1948 struct cdrom_device_ops *cdo = cdi->ops;
1949 struct packet_command cgc;
1950 char buffer[32];
1951 int ret;
1952
1953 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1954 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1955 cgc.cmd[1] = 2; /* MSF addressing */
1956 cgc.cmd[2] = 0x40; /* request subQ data */
1957 cgc.cmd[3] = mcn ? 2 : 1;
1958 cgc.cmd[8] = 16;
1959
1960 if ((ret = cdo->generic_packet(cdi, &cgc)))
1961 return ret;
1962
1963 subchnl->cdsc_audiostatus = cgc.buffer[1];
1964 subchnl->cdsc_format = CDROM_MSF;
1965 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1966 subchnl->cdsc_trk = cgc.buffer[6];
1967 subchnl->cdsc_ind = cgc.buffer[7];
1968
1969 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1970 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1971 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1972 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1973 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1974 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1975
1976 return 0;
1977 }
1978
1979 /*
1980 * Specific READ_10 interface
1981 */
1982 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1983 struct packet_command *cgc, int lba,
1984 int blocksize, int nblocks)
1985 {
1986 struct cdrom_device_ops *cdo = cdi->ops;
1987
1988 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1989 cgc->cmd[0] = GPCMD_READ_10;
1990 cgc->cmd[2] = (lba >> 24) & 0xff;
1991 cgc->cmd[3] = (lba >> 16) & 0xff;
1992 cgc->cmd[4] = (lba >> 8) & 0xff;
1993 cgc->cmd[5] = lba & 0xff;
1994 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1995 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1996 cgc->cmd[8] = nblocks & 0xff;
1997 cgc->buflen = blocksize * nblocks;
1998 return cdo->generic_packet(cdi, cgc);
1999 }
2000
2001 /* very generic interface for reading the various types of blocks */
2002 static int cdrom_read_block(struct cdrom_device_info *cdi,
2003 struct packet_command *cgc,
2004 int lba, int nblocks, int format, int blksize)
2005 {
2006 struct cdrom_device_ops *cdo = cdi->ops;
2007
2008 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2009 cgc->cmd[0] = GPCMD_READ_CD;
2010 /* expected sector size - cdda,mode1,etc. */
2011 cgc->cmd[1] = format << 2;
2012 /* starting address */
2013 cgc->cmd[2] = (lba >> 24) & 0xff;
2014 cgc->cmd[3] = (lba >> 16) & 0xff;
2015 cgc->cmd[4] = (lba >> 8) & 0xff;
2016 cgc->cmd[5] = lba & 0xff;
2017 /* number of blocks */
2018 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2019 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2020 cgc->cmd[8] = nblocks & 0xff;
2021 cgc->buflen = blksize * nblocks;
2022
2023 /* set the header info returned */
2024 switch (blksize) {
2025 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2026 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2027 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2028 default : cgc->cmd[9] = 0x10;
2029 }
2030
2031 return cdo->generic_packet(cdi, cgc);
2032 }
2033
2034 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2035 int lba, int nframes)
2036 {
2037 struct packet_command cgc;
2038 int ret = 0;
2039 int nr;
2040
2041 cdi->last_sense = 0;
2042
2043 memset(&cgc, 0, sizeof(cgc));
2044
2045 /*
2046 * start with will ra.nframes size, back down if alloc fails
2047 */
2048 nr = nframes;
2049 do {
2050 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2051 if (cgc.buffer)
2052 break;
2053
2054 nr >>= 1;
2055 } while (nr);
2056
2057 if (!nr)
2058 return -ENOMEM;
2059
2060 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2061 ret = -EFAULT;
2062 goto out;
2063 }
2064
2065 cgc.data_direction = CGC_DATA_READ;
2066 while (nframes > 0) {
2067 if (nr > nframes)
2068 nr = nframes;
2069
2070 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2071 if (ret)
2072 break;
2073 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2074 ret = -EFAULT;
2075 break;
2076 }
2077 ubuf += CD_FRAMESIZE_RAW * nr;
2078 nframes -= nr;
2079 lba += nr;
2080 }
2081 out:
2082 kfree(cgc.buffer);
2083 return ret;
2084 }
2085
2086 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2087 int lba, int nframes)
2088 {
2089 struct request_queue *q = cdi->disk->queue;
2090 struct request *rq;
2091 struct bio *bio;
2092 unsigned int len;
2093 int nr, ret = 0;
2094
2095 if (!q)
2096 return -ENXIO;
2097
2098 cdi->last_sense = 0;
2099
2100 while (nframes) {
2101 nr = nframes;
2102 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2103 nr = 1;
2104 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2105 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2106
2107 len = nr * CD_FRAMESIZE_RAW;
2108
2109 rq = blk_get_request(q, READ, GFP_KERNEL);
2110 if (!rq) {
2111 ret = -ENOMEM;
2112 break;
2113 }
2114
2115 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2116 if (ret) {
2117 blk_put_request(rq);
2118 break;
2119 }
2120
2121 rq->cmd[0] = GPCMD_READ_CD;
2122 rq->cmd[1] = 1 << 2;
2123 rq->cmd[2] = (lba >> 24) & 0xff;
2124 rq->cmd[3] = (lba >> 16) & 0xff;
2125 rq->cmd[4] = (lba >> 8) & 0xff;
2126 rq->cmd[5] = lba & 0xff;
2127 rq->cmd[6] = (nr >> 16) & 0xff;
2128 rq->cmd[7] = (nr >> 8) & 0xff;
2129 rq->cmd[8] = nr & 0xff;
2130 rq->cmd[9] = 0xf8;
2131
2132 rq->cmd_len = 12;
2133 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2134 rq->timeout = 60 * HZ;
2135 bio = rq->bio;
2136
2137 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2138 struct request_sense *s = rq->sense;
2139 ret = -EIO;
2140 cdi->last_sense = s->sense_key;
2141 }
2142
2143 if (blk_rq_unmap_user(bio))
2144 ret = -EFAULT;
2145 blk_put_request(rq);
2146
2147 if (ret)
2148 break;
2149
2150 nframes -= nr;
2151 lba += nr;
2152 ubuf += len;
2153 }
2154
2155 return ret;
2156 }
2157
2158 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2159 int lba, int nframes)
2160 {
2161 int ret;
2162
2163 if (cdi->cdda_method == CDDA_OLD)
2164 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2165
2166 retry:
2167 /*
2168 * for anything else than success and io error, we need to retry
2169 */
2170 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2171 if (!ret || ret != -EIO)
2172 return ret;
2173
2174 /*
2175 * I've seen drives get sense 4/8/3 udma crc errors on multi
2176 * frame dma, so drop to single frame dma if we need to
2177 */
2178 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2179 printk("cdrom: dropping to single frame dma\n");
2180 cdi->cdda_method = CDDA_BPC_SINGLE;
2181 goto retry;
2182 }
2183
2184 /*
2185 * so we have an io error of some sort with multi frame dma. if the
2186 * condition wasn't a hardware error
2187 * problems, not for any error
2188 */
2189 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2190 return ret;
2191
2192 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2193 cdi->cdda_method = CDDA_OLD;
2194 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2195 }
2196
2197 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2198 void __user *argp)
2199 {
2200 struct cdrom_multisession ms_info;
2201 u8 requested_format;
2202 int ret;
2203
2204 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2205
2206 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2207 return -ENOSYS;
2208
2209 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2210 return -EFAULT;
2211
2212 requested_format = ms_info.addr_format;
2213 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2214 return -EINVAL;
2215 ms_info.addr_format = CDROM_LBA;
2216
2217 ret = cdi->ops->get_last_session(cdi, &ms_info);
2218 if (ret)
2219 return ret;
2220
2221 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2222
2223 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2224 return -EFAULT;
2225
2226 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2227 return 0;
2228 }
2229
2230 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2231 {
2232 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2233
2234 if (!CDROM_CAN(CDC_OPEN_TRAY))
2235 return -ENOSYS;
2236 if (cdi->use_count != 1 || keeplocked)
2237 return -EBUSY;
2238 if (CDROM_CAN(CDC_LOCK)) {
2239 int ret = cdi->ops->lock_door(cdi, 0);
2240 if (ret)
2241 return ret;
2242 }
2243
2244 return cdi->ops->tray_move(cdi, 1);
2245 }
2246
2247 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2248 {
2249 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2250
2251 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2252 return -ENOSYS;
2253 return cdi->ops->tray_move(cdi, 0);
2254 }
2255
2256 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2257 unsigned long arg)
2258 {
2259 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2260
2261 if (!CDROM_CAN(CDC_OPEN_TRAY))
2262 return -ENOSYS;
2263 if (keeplocked)
2264 return -EBUSY;
2265
2266 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2267 if (arg)
2268 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2269 return 0;
2270 }
2271
2272 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2273 unsigned long arg)
2274 {
2275 struct cdrom_changer_info *info;
2276 int ret;
2277
2278 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2279
2280 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2281 return -ENOSYS;
2282
2283 /* cannot select disc or select current disc */
2284 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2285 return media_changed(cdi, 1);
2286
2287 if ((unsigned int)arg >= cdi->capacity)
2288 return -EINVAL;
2289
2290 info = kmalloc(sizeof(*info), GFP_KERNEL);
2291 if (!info)
2292 return -ENOMEM;
2293
2294 ret = cdrom_read_mech_status(cdi, info);
2295 if (!ret)
2296 ret = info->slots[arg].change;
2297 kfree(info);
2298 return ret;
2299 }
2300
2301 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2302 unsigned long arg)
2303 {
2304 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2305
2306 /*
2307 * Options need to be in sync with capability.
2308 * Too late for that, so we have to check each one separately.
2309 */
2310 switch (arg) {
2311 case CDO_USE_FFLAGS:
2312 case CDO_CHECK_TYPE:
2313 break;
2314 case CDO_LOCK:
2315 if (!CDROM_CAN(CDC_LOCK))
2316 return -ENOSYS;
2317 break;
2318 case 0:
2319 return cdi->options;
2320 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2321 default:
2322 if (!CDROM_CAN(arg))
2323 return -ENOSYS;
2324 }
2325 cdi->options |= (int) arg;
2326 return cdi->options;
2327 }
2328
2329 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2330 unsigned long arg)
2331 {
2332 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2333
2334 cdi->options &= ~(int) arg;
2335 return cdi->options;
2336 }
2337
2338 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2339 unsigned long arg)
2340 {
2341 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2342
2343 if (!CDROM_CAN(CDC_SELECT_SPEED))
2344 return -ENOSYS;
2345 return cdi->ops->select_speed(cdi, arg);
2346 }
2347
2348 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2349 unsigned long arg)
2350 {
2351 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2352
2353 if (!CDROM_CAN(CDC_SELECT_DISC))
2354 return -ENOSYS;
2355
2356 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2357 if ((int)arg >= cdi->capacity)
2358 return -EINVAL;
2359 }
2360
2361 /*
2362 * ->select_disc is a hook to allow a driver-specific way of
2363 * seleting disc. However, since there is no equivalent hook for
2364 * cdrom_slot_status this may not actually be useful...
2365 */
2366 if (cdi->ops->select_disc)
2367 return cdi->ops->select_disc(cdi, arg);
2368
2369 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2370 return cdrom_select_disc(cdi, arg);
2371 }
2372
2373 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2374 struct block_device *bdev)
2375 {
2376 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2377
2378 if (!capable(CAP_SYS_ADMIN))
2379 return -EACCES;
2380 if (!CDROM_CAN(CDC_RESET))
2381 return -ENOSYS;
2382 invalidate_bdev(bdev);
2383 return cdi->ops->reset(cdi);
2384 }
2385
2386 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2387 unsigned long arg)
2388 {
2389 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2390
2391 if (!CDROM_CAN(CDC_LOCK))
2392 return -EDRIVE_CANT_DO_THIS;
2393
2394 keeplocked = arg ? 1 : 0;
2395
2396 /*
2397 * Don't unlock the door on multiple opens by default, but allow
2398 * root to do so.
2399 */
2400 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2401 return -EBUSY;
2402 return cdi->ops->lock_door(cdi, arg);
2403 }
2404
2405 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2406 unsigned long arg)
2407 {
2408 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2409
2410 if (!capable(CAP_SYS_ADMIN))
2411 return -EACCES;
2412 debug = arg ? 1 : 0;
2413 return debug;
2414 }
2415
2416 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2417 {
2418 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2419 return (cdi->ops->capability & ~cdi->mask);
2420 }
2421
2422 /*
2423 * The following function is implemented, although very few audio
2424 * discs give Universal Product Code information, which should just be
2425 * the Medium Catalog Number on the box. Note, that the way the code
2426 * is written on the CD is /not/ uniform across all discs!
2427 */
2428 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2429 void __user *argp)
2430 {
2431 struct cdrom_mcn mcn;
2432 int ret;
2433
2434 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2435
2436 if (!(cdi->ops->capability & CDC_MCN))
2437 return -ENOSYS;
2438 ret = cdi->ops->get_mcn(cdi, &mcn);
2439 if (ret)
2440 return ret;
2441
2442 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2443 return -EFAULT;
2444 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2445 return 0;
2446 }
2447
2448 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2449 unsigned long arg)
2450 {
2451 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2452
2453 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2454 return -ENOSYS;
2455 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2456 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2457 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2458 if (((int)arg >= cdi->capacity))
2459 return -EINVAL;
2460 return cdrom_slot_status(cdi, arg);
2461 }
2462
2463 /*
2464 * Ok, this is where problems start. The current interface for the
2465 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2466 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2467 * is often the case, it is also very common for CDs to have some tracks
2468 * with data, and some tracks with audio. Just because I feel like it,
2469 * I declare the following to be the best way to cope. If the CD has ANY
2470 * data tracks on it, it will be returned as a data CD. If it has any XA
2471 * tracks, I will return it as that. Now I could simplify this interface
2472 * by combining these returns with the above, but this more clearly
2473 * demonstrates the problem with the current interface. Too bad this
2474 * wasn't designed to use bitmasks... -Erik
2475 *
2476 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2477 * User level programmers might feel the ioctl is not very useful.
2478 * ---david
2479 */
2480 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2481 {
2482 tracktype tracks;
2483
2484 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2485
2486 cdrom_count_tracks(cdi, &tracks);
2487 if (tracks.error)
2488 return tracks.error;
2489
2490 /* Policy mode on */
2491 if (tracks.audio > 0) {
2492 if (!tracks.data && !tracks.cdi && !tracks.xa)
2493 return CDS_AUDIO;
2494 else
2495 return CDS_MIXED;
2496 }
2497
2498 if (tracks.cdi > 0)
2499 return CDS_XA_2_2;
2500 if (tracks.xa > 0)
2501 return CDS_XA_2_1;
2502 if (tracks.data > 0)
2503 return CDS_DATA_1;
2504 /* Policy mode off */
2505
2506 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2507 return CDS_NO_INFO;
2508 }
2509
2510 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2511 {
2512 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2513 return cdi->capacity;
2514 }
2515
2516 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2517 void __user *argp)
2518 {
2519 struct cdrom_subchnl q;
2520 u8 requested, back;
2521 int ret;
2522
2523 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2524
2525 if (copy_from_user(&q, argp, sizeof(q)))
2526 return -EFAULT;
2527
2528 requested = q.cdsc_format;
2529 if (requested != CDROM_MSF && requested != CDROM_LBA)
2530 return -EINVAL;
2531 q.cdsc_format = CDROM_MSF;
2532
2533 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2534 if (ret)
2535 return ret;
2536
2537 back = q.cdsc_format; /* local copy */
2538 sanitize_format(&q.cdsc_absaddr, &back, requested);
2539 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2540
2541 if (copy_to_user(argp, &q, sizeof(q)))
2542 return -EFAULT;
2543 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2544 return 0;
2545 }
2546
2547 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2548 void __user *argp)
2549 {
2550 struct cdrom_tochdr header;
2551 int ret;
2552
2553 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2554
2555 if (copy_from_user(&header, argp, sizeof(header)))
2556 return -EFAULT;
2557
2558 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2559 if (ret)
2560 return ret;
2561
2562 if (copy_to_user(argp, &header, sizeof(header)))
2563 return -EFAULT;
2564 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2565 return 0;
2566 }
2567
2568 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2569 void __user *argp)
2570 {
2571 struct cdrom_tocentry entry;
2572 u8 requested_format;
2573 int ret;
2574
2575 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2576
2577 if (copy_from_user(&entry, argp, sizeof(entry)))
2578 return -EFAULT;
2579
2580 requested_format = entry.cdte_format;
2581 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2582 return -EINVAL;
2583 /* make interface to low-level uniform */
2584 entry.cdte_format = CDROM_MSF;
2585 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2586 if (ret)
2587 return ret;
2588 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2589
2590 if (copy_to_user(argp, &entry, sizeof(entry)))
2591 return -EFAULT;
2592 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2593 return 0;
2594 }
2595
2596 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2597 void __user *argp)
2598 {
2599 struct cdrom_msf msf;
2600
2601 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2602
2603 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2604 return -ENOSYS;
2605 if (copy_from_user(&msf, argp, sizeof(msf)))
2606 return -EFAULT;
2607 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2608 }
2609
2610 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2611 void __user *argp)
2612 {
2613 struct cdrom_ti ti;
2614 int ret;
2615
2616 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2617
2618 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2619 return -ENOSYS;
2620 if (copy_from_user(&ti, argp, sizeof(ti)))
2621 return -EFAULT;
2622
2623 ret = check_for_audio_disc(cdi, cdi->ops);
2624 if (ret)
2625 return ret;
2626 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2627 }
2628 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2629 void __user *argp)
2630 {
2631 struct cdrom_volctrl volume;
2632
2633 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2634
2635 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2636 return -ENOSYS;
2637 if (copy_from_user(&volume, argp, sizeof(volume)))
2638 return -EFAULT;
2639 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2640 }
2641
2642 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2643 void __user *argp)
2644 {
2645 struct cdrom_volctrl volume;
2646 int ret;
2647
2648 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2649
2650 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2651 return -ENOSYS;
2652
2653 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2654 if (ret)
2655 return ret;
2656
2657 if (copy_to_user(argp, &volume, sizeof(volume)))
2658 return -EFAULT;
2659 return 0;
2660 }
2661
2662 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2663 unsigned int cmd)
2664 {
2665 int ret;
2666
2667 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2668
2669 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2670 return -ENOSYS;
2671 ret = check_for_audio_disc(cdi, cdi->ops);
2672 if (ret)
2673 return ret;
2674 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2675 }
2676
2677 /*
2678 * Just about every imaginable ioctl is supported in the Uniform layer
2679 * these days.
2680 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2681 */
2682 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2683 fmode_t mode, unsigned int cmd, unsigned long arg)
2684 {
2685 void __user *argp = (void __user *)arg;
2686 int ret;
2687 struct gendisk *disk = bdev->bd_disk;
2688
2689 /*
2690 * Try the generic SCSI command ioctl's first.
2691 */
2692 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
2693 if (ret != -ENOTTY)
2694 return ret;
2695
2696 switch (cmd) {
2697 case CDROMMULTISESSION:
2698 return cdrom_ioctl_multisession(cdi, argp);
2699 case CDROMEJECT:
2700 return cdrom_ioctl_eject(cdi);
2701 case CDROMCLOSETRAY:
2702 return cdrom_ioctl_closetray(cdi);
2703 case CDROMEJECT_SW:
2704 return cdrom_ioctl_eject_sw(cdi, arg);
2705 case CDROM_MEDIA_CHANGED:
2706 return cdrom_ioctl_media_changed(cdi, arg);
2707 case CDROM_SET_OPTIONS:
2708 return cdrom_ioctl_set_options(cdi, arg);
2709 case CDROM_CLEAR_OPTIONS:
2710 return cdrom_ioctl_clear_options(cdi, arg);
2711 case CDROM_SELECT_SPEED:
2712 return cdrom_ioctl_select_speed(cdi, arg);
2713 case CDROM_SELECT_DISC:
2714 return cdrom_ioctl_select_disc(cdi, arg);
2715 case CDROMRESET:
2716 return cdrom_ioctl_reset(cdi, bdev);
2717 case CDROM_LOCKDOOR:
2718 return cdrom_ioctl_lock_door(cdi, arg);
2719 case CDROM_DEBUG:
2720 return cdrom_ioctl_debug(cdi, arg);
2721 case CDROM_GET_CAPABILITY:
2722 return cdrom_ioctl_get_capability(cdi);
2723 case CDROM_GET_MCN:
2724 return cdrom_ioctl_get_mcn(cdi, argp);
2725 case CDROM_DRIVE_STATUS:
2726 return cdrom_ioctl_drive_status(cdi, arg);
2727 case CDROM_DISC_STATUS:
2728 return cdrom_ioctl_disc_status(cdi);
2729 case CDROM_CHANGER_NSLOTS:
2730 return cdrom_ioctl_changer_nslots(cdi);
2731 }
2732
2733 /*
2734 * Use the ioctls that are implemented through the generic_packet()
2735 * interface. this may look at bit funny, but if -ENOTTY is
2736 * returned that particular ioctl is not implemented and we
2737 * let it go through the device specific ones.
2738 */
2739 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2740 ret = mmc_ioctl(cdi, cmd, arg);
2741 if (ret != -ENOTTY)
2742 return ret;
2743 }
2744
2745 /*
2746 * Note: most of the cdinfo() calls are commented out here,
2747 * because they fill up the sys log when CD players poll
2748 * the drive.
2749 */
2750 switch (cmd) {
2751 case CDROMSUBCHNL:
2752 return cdrom_ioctl_get_subchnl(cdi, argp);
2753 case CDROMREADTOCHDR:
2754 return cdrom_ioctl_read_tochdr(cdi, argp);
2755 case CDROMREADTOCENTRY:
2756 return cdrom_ioctl_read_tocentry(cdi, argp);
2757 case CDROMPLAYMSF:
2758 return cdrom_ioctl_play_msf(cdi, argp);
2759 case CDROMPLAYTRKIND:
2760 return cdrom_ioctl_play_trkind(cdi, argp);
2761 case CDROMVOLCTRL:
2762 return cdrom_ioctl_volctrl(cdi, argp);
2763 case CDROMVOLREAD:
2764 return cdrom_ioctl_volread(cdi, argp);
2765 case CDROMSTART:
2766 case CDROMSTOP:
2767 case CDROMPAUSE:
2768 case CDROMRESUME:
2769 return cdrom_ioctl_audioctl(cdi, cmd);
2770 }
2771
2772 return -ENOSYS;
2773 }
2774
2775 /*
2776 * Required when we need to use READ_10 to issue other than 2048 block
2777 * reads
2778 */
2779 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2780 {
2781 struct cdrom_device_ops *cdo = cdi->ops;
2782 struct packet_command cgc;
2783 struct modesel_head mh;
2784
2785 memset(&mh, 0, sizeof(mh));
2786 mh.block_desc_length = 0x08;
2787 mh.block_length_med = (size >> 8) & 0xff;
2788 mh.block_length_lo = size & 0xff;
2789
2790 memset(&cgc, 0, sizeof(cgc));
2791 cgc.cmd[0] = 0x15;
2792 cgc.cmd[1] = 1 << 4;
2793 cgc.cmd[4] = 12;
2794 cgc.buflen = sizeof(mh);
2795 cgc.buffer = (char *) &mh;
2796 cgc.data_direction = CGC_DATA_WRITE;
2797 mh.block_desc_length = 0x08;
2798 mh.block_length_med = (size >> 8) & 0xff;
2799 mh.block_length_lo = size & 0xff;
2800
2801 return cdo->generic_packet(cdi, &cgc);
2802 }
2803
2804 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2805 void __user *arg,
2806 struct packet_command *cgc,
2807 int cmd)
2808 {
2809 struct request_sense sense;
2810 struct cdrom_msf msf;
2811 int blocksize = 0, format = 0, lba;
2812 int ret;
2813
2814 switch (cmd) {
2815 case CDROMREADRAW:
2816 blocksize = CD_FRAMESIZE_RAW;
2817 break;
2818 case CDROMREADMODE1:
2819 blocksize = CD_FRAMESIZE;
2820 format = 2;
2821 break;
2822 case CDROMREADMODE2:
2823 blocksize = CD_FRAMESIZE_RAW0;
2824 break;
2825 }
2826 IOCTL_IN(arg, struct cdrom_msf, msf);
2827 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2828 /* FIXME: we need upper bound checking, too!! */
2829 if (lba < 0)
2830 return -EINVAL;
2831
2832 cgc->buffer = kmalloc(blocksize, GFP_KERNEL);
2833 if (cgc->buffer == NULL)
2834 return -ENOMEM;
2835
2836 memset(&sense, 0, sizeof(sense));
2837 cgc->sense = &sense;
2838 cgc->data_direction = CGC_DATA_READ;
2839 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2840 if (ret && sense.sense_key == 0x05 &&
2841 sense.asc == 0x20 &&
2842 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 ret = cdrom_switch_blocksize(cdi, blocksize);
2849 if (ret)
2850 goto out;
2851 cgc->sense = NULL;
2852 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2853 ret |= cdrom_switch_blocksize(cdi, blocksize);
2854 }
2855 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2856 ret = -EFAULT;
2857 out:
2858 kfree(cgc->buffer);
2859 return ret;
2860 }
2861
2862 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2863 void __user *arg)
2864 {
2865 struct cdrom_read_audio ra;
2866 int lba;
2867
2868 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2869
2870 if (ra.addr_format == CDROM_MSF)
2871 lba = msf_to_lba(ra.addr.msf.minute,
2872 ra.addr.msf.second,
2873 ra.addr.msf.frame);
2874 else if (ra.addr_format == CDROM_LBA)
2875 lba = ra.addr.lba;
2876 else
2877 return -EINVAL;
2878
2879 /* FIXME: we need upper bound checking, too!! */
2880 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2881 return -EINVAL;
2882
2883 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2884 }
2885
2886 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2887 void __user *arg)
2888 {
2889 int ret;
2890 struct cdrom_subchnl q;
2891 u_char requested, back;
2892 IOCTL_IN(arg, struct cdrom_subchnl, q);
2893 requested = q.cdsc_format;
2894 if (!((requested == CDROM_MSF) ||
2895 (requested == CDROM_LBA)))
2896 return -EINVAL;
2897 q.cdsc_format = CDROM_MSF;
2898 ret = cdrom_read_subchannel(cdi, &q, 0);
2899 if (ret)
2900 return ret;
2901 back = q.cdsc_format; /* local copy */
2902 sanitize_format(&q.cdsc_absaddr, &back, requested);
2903 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2904 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2905 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2906 return 0;
2907 }
2908
2909 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2910 void __user *arg,
2911 struct packet_command *cgc)
2912 {
2913 struct cdrom_device_ops *cdo = cdi->ops;
2914 struct cdrom_msf msf;
2915 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2916 IOCTL_IN(arg, struct cdrom_msf, msf);
2917 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2918 cgc->cmd[3] = msf.cdmsf_min0;
2919 cgc->cmd[4] = msf.cdmsf_sec0;
2920 cgc->cmd[5] = msf.cdmsf_frame0;
2921 cgc->cmd[6] = msf.cdmsf_min1;
2922 cgc->cmd[7] = msf.cdmsf_sec1;
2923 cgc->cmd[8] = msf.cdmsf_frame1;
2924 cgc->data_direction = CGC_DATA_NONE;
2925 return cdo->generic_packet(cdi, cgc);
2926 }
2927
2928 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2929 void __user *arg,
2930 struct packet_command *cgc)
2931 {
2932 struct cdrom_device_ops *cdo = cdi->ops;
2933 struct cdrom_blk blk;
2934 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2935 IOCTL_IN(arg, struct cdrom_blk, blk);
2936 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
2937 cgc->cmd[2] = (blk.from >> 24) & 0xff;
2938 cgc->cmd[3] = (blk.from >> 16) & 0xff;
2939 cgc->cmd[4] = (blk.from >> 8) & 0xff;
2940 cgc->cmd[5] = blk.from & 0xff;
2941 cgc->cmd[7] = (blk.len >> 8) & 0xff;
2942 cgc->cmd[8] = blk.len & 0xff;
2943 cgc->data_direction = CGC_DATA_NONE;
2944 return cdo->generic_packet(cdi, cgc);
2945 }
2946
2947 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
2948 void __user *arg,
2949 struct packet_command *cgc,
2950 unsigned int cmd)
2951 {
2952 struct cdrom_volctrl volctrl;
2953 unsigned char buffer[32];
2954 char mask[sizeof(buffer)];
2955 unsigned short offset;
2956 int ret;
2957
2958 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2959
2960 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2961
2962 cgc->buffer = buffer;
2963 cgc->buflen = 24;
2964 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
2965 if (ret)
2966 return ret;
2967
2968 /* originally the code depended on buffer[1] to determine
2969 how much data is available for transfer. buffer[1] is
2970 unfortunately ambigious and the only reliable way seem
2971 to be to simply skip over the block descriptor... */
2972 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
2973
2974 if (offset + 16 > sizeof(buffer))
2975 return -E2BIG;
2976
2977 if (offset + 16 > cgc->buflen) {
2978 cgc->buflen = offset + 16;
2979 ret = cdrom_mode_sense(cdi, cgc,
2980 GPMODE_AUDIO_CTL_PAGE, 0);
2981 if (ret)
2982 return ret;
2983 }
2984
2985 /* sanity check */
2986 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2987 buffer[offset + 1] < 14)
2988 return -EINVAL;
2989
2990 /* now we have the current volume settings. if it was only
2991 a CDROMVOLREAD, return these values */
2992 if (cmd == CDROMVOLREAD) {
2993 volctrl.channel0 = buffer[offset+9];
2994 volctrl.channel1 = buffer[offset+11];
2995 volctrl.channel2 = buffer[offset+13];
2996 volctrl.channel3 = buffer[offset+15];
2997 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2998 return 0;
2999 }
3000
3001 /* get the volume mask */
3002 cgc->buffer = mask;
3003 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3004 if (ret)
3005 return ret;
3006
3007 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3008 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3009 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3010 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3011
3012 /* set volume */
3013 cgc->buffer = buffer + offset - 8;
3014 memset(cgc->buffer, 0, 8);
3015 return cdrom_mode_select(cdi, cgc);
3016 }
3017
3018 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3019 struct packet_command *cgc,
3020 int cmd)
3021 {
3022 struct cdrom_device_ops *cdo = cdi->ops;
3023 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3024 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3025 cgc->cmd[1] = 1;
3026 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3027 cgc->data_direction = CGC_DATA_NONE;
3028 return cdo->generic_packet(cdi, cgc);
3029 }
3030
3031 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3032 struct packet_command *cgc,
3033 int cmd)
3034 {
3035 struct cdrom_device_ops *cdo = cdi->ops;
3036 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3037 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3038 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3039 cgc->data_direction = CGC_DATA_NONE;
3040 return cdo->generic_packet(cdi, cgc);
3041 }
3042
3043 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3044 void __user *arg,
3045 struct packet_command *cgc)
3046 {
3047 int ret;
3048 dvd_struct *s;
3049 int size = sizeof(dvd_struct);
3050
3051 if (!CDROM_CAN(CDC_DVD))
3052 return -ENOSYS;
3053
3054 s = kmalloc(size, GFP_KERNEL);
3055 if (!s)
3056 return -ENOMEM;
3057
3058 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3059 if (copy_from_user(s, arg, size)) {
3060 kfree(s);
3061 return -EFAULT;
3062 }
3063
3064 ret = dvd_read_struct(cdi, s, cgc);
3065 if (ret)
3066 goto out;
3067
3068 if (copy_to_user(arg, s, size))
3069 ret = -EFAULT;
3070 out:
3071 kfree(s);
3072 return ret;
3073 }
3074
3075 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3076 void __user *arg)
3077 {
3078 int ret;
3079 dvd_authinfo ai;
3080 if (!CDROM_CAN(CDC_DVD))
3081 return -ENOSYS;
3082 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3083 IOCTL_IN(arg, dvd_authinfo, ai);
3084 ret = dvd_do_auth(cdi, &ai);
3085 if (ret)
3086 return ret;
3087 IOCTL_OUT(arg, dvd_authinfo, ai);
3088 return 0;
3089 }
3090
3091 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3092 void __user *arg)
3093 {
3094 int ret;
3095 long next = 0;
3096 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3097 ret = cdrom_get_next_writable(cdi, &next);
3098 if (ret)
3099 return ret;
3100 IOCTL_OUT(arg, long, next);
3101 return 0;
3102 }
3103
3104 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3105 void __user *arg)
3106 {
3107 int ret;
3108 long last = 0;
3109 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3110 ret = cdrom_get_last_written(cdi, &last);
3111 if (ret)
3112 return ret;
3113 IOCTL_OUT(arg, long, last);
3114 return 0;
3115 }
3116
3117 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3118 unsigned long arg)
3119 {
3120 struct packet_command cgc;
3121 void __user *userptr = (void __user *)arg;
3122
3123 memset(&cgc, 0, sizeof(cgc));
3124
3125 /* build a unified command and queue it through
3126 cdo->generic_packet() */
3127 switch (cmd) {
3128 case CDROMREADRAW:
3129 case CDROMREADMODE1:
3130 case CDROMREADMODE2:
3131 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3132 case CDROMREADAUDIO:
3133 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3134 case CDROMSUBCHNL:
3135 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3136 case CDROMPLAYMSF:
3137 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3138 case CDROMPLAYBLK:
3139 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3140 case CDROMVOLCTRL:
3141 case CDROMVOLREAD:
3142 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3143 case CDROMSTART:
3144 case CDROMSTOP:
3145 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3146 case CDROMPAUSE:
3147 case CDROMRESUME:
3148 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3149 case DVD_READ_STRUCT:
3150 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3151 case DVD_AUTH:
3152 return mmc_ioctl_dvd_auth(cdi, userptr);
3153 case CDROM_NEXT_WRITABLE:
3154 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3155 case CDROM_LAST_WRITTEN:
3156 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3157 }
3158
3159 return -ENOTTY;
3160 }
3161
3162 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3163 track_information *ti)
3164 {
3165 struct cdrom_device_ops *cdo = cdi->ops;
3166 struct packet_command cgc;
3167 int ret, buflen;
3168
3169 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3170 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3171 cgc.cmd[1] = type & 3;
3172 cgc.cmd[4] = (track & 0xff00) >> 8;
3173 cgc.cmd[5] = track & 0xff;
3174 cgc.cmd[8] = 8;
3175 cgc.quiet = 1;
3176
3177 if ((ret = cdo->generic_packet(cdi, &cgc)))
3178 return ret;
3179
3180 buflen = be16_to_cpu(ti->track_information_length) +
3181 sizeof(ti->track_information_length);
3182
3183 if (buflen > sizeof(track_information))
3184 buflen = sizeof(track_information);
3185
3186 cgc.cmd[8] = cgc.buflen = buflen;
3187 if ((ret = cdo->generic_packet(cdi, &cgc)))
3188 return ret;
3189
3190 /* return actual fill size */
3191 return buflen;
3192 }
3193
3194 /* requires CD R/RW */
3195 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3196 {
3197 struct cdrom_device_ops *cdo = cdi->ops;
3198 struct packet_command cgc;
3199 int ret, buflen;
3200
3201 /* set up command and get the disc info */
3202 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3203 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3204 cgc.cmd[8] = cgc.buflen = 2;
3205 cgc.quiet = 1;
3206
3207 if ((ret = cdo->generic_packet(cdi, &cgc)))
3208 return ret;
3209
3210 /* not all drives have the same disc_info length, so requeue
3211 * packet with the length the drive tells us it can supply
3212 */
3213 buflen = be16_to_cpu(di->disc_information_length) +
3214 sizeof(di->disc_information_length);
3215
3216 if (buflen > sizeof(disc_information))
3217 buflen = sizeof(disc_information);
3218
3219 cgc.cmd[8] = cgc.buflen = buflen;
3220 if ((ret = cdo->generic_packet(cdi, &cgc)))
3221 return ret;
3222
3223 /* return actual fill size */
3224 return buflen;
3225 }
3226
3227 /* return the last written block on the CD-R media. this is for the udf
3228 file system. */
3229 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3230 {
3231 struct cdrom_tocentry toc;
3232 disc_information di;
3233 track_information ti;
3234 __u32 last_track;
3235 int ret = -1, ti_size;
3236
3237 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3238 goto use_toc;
3239
3240 ret = cdrom_get_disc_info(cdi, &di);
3241 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3242 + sizeof(di.last_track_lsb)))
3243 goto use_toc;
3244
3245 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3246 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3247 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3248 if (ti_size < (int)offsetof(typeof(ti), track_start))
3249 goto use_toc;
3250
3251 /* if this track is blank, try the previous. */
3252 if (ti.blank) {
3253 if (last_track==1)
3254 goto use_toc;
3255 last_track--;
3256 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3257 }
3258
3259 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3260 + sizeof(ti.track_size)))
3261 goto use_toc;
3262
3263 /* if last recorded field is valid, return it. */
3264 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3265 + sizeof(ti.last_rec_address))) {
3266 *last_written = be32_to_cpu(ti.last_rec_address);
3267 } else {
3268 /* make it up instead */
3269 *last_written = be32_to_cpu(ti.track_start) +
3270 be32_to_cpu(ti.track_size);
3271 if (ti.free_blocks)
3272 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3273 }
3274 return 0;
3275
3276 /* this is where we end up if the drive either can't do a
3277 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3278 it doesn't give enough information or fails. then we return
3279 the toc contents. */
3280 use_toc:
3281 toc.cdte_format = CDROM_MSF;
3282 toc.cdte_track = CDROM_LEADOUT;
3283 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3284 return ret;
3285 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3286 *last_written = toc.cdte_addr.lba;
3287 return 0;
3288 }
3289
3290 /* return the next writable block. also for udf file system. */
3291 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3292 {
3293 disc_information di;
3294 track_information ti;
3295 __u16 last_track;
3296 int ret, ti_size;
3297
3298 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3299 goto use_last_written;
3300
3301 ret = cdrom_get_disc_info(cdi, &di);
3302 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3303 + sizeof(di.last_track_lsb))
3304 goto use_last_written;
3305
3306 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3307 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3308 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3309 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3310 goto use_last_written;
3311
3312 /* if this track is blank, try the previous. */
3313 if (ti.blank) {
3314 if (last_track == 1)
3315 goto use_last_written;
3316 last_track--;
3317 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3318 if (ti_size < 0)
3319 goto use_last_written;
3320 }
3321
3322 /* if next recordable address field is valid, use it. */
3323 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3324 + sizeof(ti.next_writable)) {
3325 *next_writable = be32_to_cpu(ti.next_writable);
3326 return 0;
3327 }
3328
3329 use_last_written:
3330 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3331 *next_writable = 0;
3332 return ret;
3333 } else {
3334 *next_writable += 7;
3335 return 0;
3336 }
3337 }
3338
3339 EXPORT_SYMBOL(cdrom_get_last_written);
3340 EXPORT_SYMBOL(register_cdrom);
3341 EXPORT_SYMBOL(unregister_cdrom);
3342 EXPORT_SYMBOL(cdrom_open);
3343 EXPORT_SYMBOL(cdrom_release);
3344 EXPORT_SYMBOL(cdrom_ioctl);
3345 EXPORT_SYMBOL(cdrom_media_changed);
3346 EXPORT_SYMBOL(cdrom_number_of_slots);
3347 EXPORT_SYMBOL(cdrom_mode_select);
3348 EXPORT_SYMBOL(cdrom_mode_sense);
3349 EXPORT_SYMBOL(init_cdrom_command);
3350 EXPORT_SYMBOL(cdrom_get_media_event);
3351
3352 #ifdef CONFIG_SYSCTL
3353
3354 #define CDROM_STR_SIZE 1000
3355
3356 static struct cdrom_sysctl_settings {
3357 char info[CDROM_STR_SIZE]; /* general info */
3358 int autoclose; /* close tray upon mount, etc */
3359 int autoeject; /* eject on umount */
3360 int debug; /* turn on debugging messages */
3361 int lock; /* lock the door on device open */
3362 int check; /* check media type */
3363 } cdrom_sysctl_settings;
3364
3365 enum cdrom_print_option {
3366 CTL_NAME,
3367 CTL_SPEED,
3368 CTL_SLOTS,
3369 CTL_CAPABILITY
3370 };
3371
3372 static int cdrom_print_info(const char *header, int val, char *info,
3373 int *pos, enum cdrom_print_option option)
3374 {
3375 const int max_size = sizeof(cdrom_sysctl_settings.info);
3376 struct cdrom_device_info *cdi;
3377 int ret;
3378
3379 ret = scnprintf(info + *pos, max_size - *pos, header);
3380 if (!ret)
3381 return 1;
3382
3383 *pos += ret;
3384
3385 list_for_each_entry(cdi, &cdrom_list, list) {
3386 switch (option) {
3387 case CTL_NAME:
3388 ret = scnprintf(info + *pos, max_size - *pos,
3389 "\t%s", cdi->name);
3390 break;
3391 case CTL_SPEED:
3392 ret = scnprintf(info + *pos, max_size - *pos,
3393 "\t%d", cdi->speed);
3394 break;
3395 case CTL_SLOTS:
3396 ret = scnprintf(info + *pos, max_size - *pos,
3397 "\t%d", cdi->capacity);
3398 break;
3399 case CTL_CAPABILITY:
3400 ret = scnprintf(info + *pos, max_size - *pos,
3401 "\t%d", CDROM_CAN(val) != 0);
3402 break;
3403 default:
3404 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3405 return 1;
3406 }
3407 if (!ret)
3408 return 1;
3409 *pos += ret;
3410 }
3411
3412 return 0;
3413 }
3414
3415 static int cdrom_sysctl_info(ctl_table *ctl, int write,
3416 void __user *buffer, size_t *lenp, loff_t *ppos)
3417 {
3418 int pos;
3419 char *info = cdrom_sysctl_settings.info;
3420 const int max_size = sizeof(cdrom_sysctl_settings.info);
3421
3422 if (!*lenp || (*ppos && !write)) {
3423 *lenp = 0;
3424 return 0;
3425 }
3426
3427 mutex_lock(&cdrom_mutex);
3428
3429 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3430
3431 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3432 goto done;
3433 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3434 goto done;
3435 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3436 goto done;
3437 if (cdrom_print_info("\nCan close tray:\t",
3438 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3439 goto done;
3440 if (cdrom_print_info("\nCan open tray:\t",
3441 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3442 goto done;
3443 if (cdrom_print_info("\nCan lock tray:\t",
3444 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3445 goto done;
3446 if (cdrom_print_info("\nCan change speed:",
3447 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3448 goto done;
3449 if (cdrom_print_info("\nCan select disk:",
3450 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3451 goto done;
3452 if (cdrom_print_info("\nCan read multisession:",
3453 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3454 goto done;
3455 if (cdrom_print_info("\nCan read MCN:\t",
3456 CDC_MCN, info, &pos, CTL_CAPABILITY))
3457 goto done;
3458 if (cdrom_print_info("\nReports media changed:",
3459 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3460 goto done;
3461 if (cdrom_print_info("\nCan play audio:\t",
3462 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3463 goto done;
3464 if (cdrom_print_info("\nCan write CD-R:\t",
3465 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3466 goto done;
3467 if (cdrom_print_info("\nCan write CD-RW:",
3468 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3469 goto done;
3470 if (cdrom_print_info("\nCan read DVD:\t",
3471 CDC_DVD, info, &pos, CTL_CAPABILITY))
3472 goto done;
3473 if (cdrom_print_info("\nCan write DVD-R:",
3474 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3475 goto done;
3476 if (cdrom_print_info("\nCan write DVD-RAM:",
3477 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3478 goto done;
3479 if (cdrom_print_info("\nCan read MRW:\t",
3480 CDC_MRW, info, &pos, CTL_CAPABILITY))
3481 goto done;
3482 if (cdrom_print_info("\nCan write MRW:\t",
3483 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3484 goto done;
3485 if (cdrom_print_info("\nCan write RAM:\t",
3486 CDC_RAM, info, &pos, CTL_CAPABILITY))
3487 goto done;
3488 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3489 goto done;
3490 doit:
3491 mutex_unlock(&cdrom_mutex);
3492 return proc_dostring(ctl, write, buffer, lenp, ppos);
3493 done:
3494 printk(KERN_INFO "cdrom: info buffer too small\n");
3495 goto doit;
3496 }
3497
3498 /* Unfortunately, per device settings are not implemented through
3499 procfs/sysctl yet. When they are, this will naturally disappear. For now
3500 just update all drives. Later this will become the template on which
3501 new registered drives will be based. */
3502 static void cdrom_update_settings(void)
3503 {
3504 struct cdrom_device_info *cdi;
3505
3506 mutex_lock(&cdrom_mutex);
3507 list_for_each_entry(cdi, &cdrom_list, list) {
3508 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3509 cdi->options |= CDO_AUTO_CLOSE;
3510 else if (!autoclose)
3511 cdi->options &= ~CDO_AUTO_CLOSE;
3512 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3513 cdi->options |= CDO_AUTO_EJECT;
3514 else if (!autoeject)
3515 cdi->options &= ~CDO_AUTO_EJECT;
3516 if (lockdoor && CDROM_CAN(CDC_LOCK))
3517 cdi->options |= CDO_LOCK;
3518 else if (!lockdoor)
3519 cdi->options &= ~CDO_LOCK;
3520 if (check_media_type)
3521 cdi->options |= CDO_CHECK_TYPE;
3522 else
3523 cdi->options &= ~CDO_CHECK_TYPE;
3524 }
3525 mutex_unlock(&cdrom_mutex);
3526 }
3527
3528 static int cdrom_sysctl_handler(ctl_table *ctl, int write,
3529 void __user *buffer, size_t *lenp, loff_t *ppos)
3530 {
3531 int ret;
3532
3533 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3534
3535 if (write) {
3536
3537 /* we only care for 1 or 0. */
3538 autoclose = !!cdrom_sysctl_settings.autoclose;
3539 autoeject = !!cdrom_sysctl_settings.autoeject;
3540 debug = !!cdrom_sysctl_settings.debug;
3541 lockdoor = !!cdrom_sysctl_settings.lock;
3542 check_media_type = !!cdrom_sysctl_settings.check;
3543
3544 /* update the option flags according to the changes. we
3545 don't have per device options through sysctl yet,
3546 but we will have and then this will disappear. */
3547 cdrom_update_settings();
3548 }
3549
3550 return ret;
3551 }
3552
3553 /* Place files in /proc/sys/dev/cdrom */
3554 static ctl_table cdrom_table[] = {
3555 {
3556 .procname = "info",
3557 .data = &cdrom_sysctl_settings.info,
3558 .maxlen = CDROM_STR_SIZE,
3559 .mode = 0444,
3560 .proc_handler = cdrom_sysctl_info,
3561 },
3562 {
3563 .procname = "autoclose",
3564 .data = &cdrom_sysctl_settings.autoclose,
3565 .maxlen = sizeof(int),
3566 .mode = 0644,
3567 .proc_handler = cdrom_sysctl_handler,
3568 },
3569 {
3570 .procname = "autoeject",
3571 .data = &cdrom_sysctl_settings.autoeject,
3572 .maxlen = sizeof(int),
3573 .mode = 0644,
3574 .proc_handler = cdrom_sysctl_handler,
3575 },
3576 {
3577 .procname = "debug",
3578 .data = &cdrom_sysctl_settings.debug,
3579 .maxlen = sizeof(int),
3580 .mode = 0644,
3581 .proc_handler = cdrom_sysctl_handler,
3582 },
3583 {
3584 .procname = "lock",
3585 .data = &cdrom_sysctl_settings.lock,
3586 .maxlen = sizeof(int),
3587 .mode = 0644,
3588 .proc_handler = cdrom_sysctl_handler,
3589 },
3590 {
3591 .procname = "check_media",
3592 .data = &cdrom_sysctl_settings.check,
3593 .maxlen = sizeof(int),
3594 .mode = 0644,
3595 .proc_handler = cdrom_sysctl_handler
3596 },
3597 { }
3598 };
3599
3600 static ctl_table cdrom_cdrom_table[] = {
3601 {
3602 .procname = "cdrom",
3603 .maxlen = 0,
3604 .mode = 0555,
3605 .child = cdrom_table,
3606 },
3607 { }
3608 };
3609
3610 /* Make sure that /proc/sys/dev is there */
3611 static ctl_table cdrom_root_table[] = {
3612 {
3613 .procname = "dev",
3614 .maxlen = 0,
3615 .mode = 0555,
3616 .child = cdrom_cdrom_table,
3617 },
3618 { }
3619 };
3620 static struct ctl_table_header *cdrom_sysctl_header;
3621
3622 static void cdrom_sysctl_register(void)
3623 {
3624 static int initialized;
3625
3626 if (initialized == 1)
3627 return;
3628
3629 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3630
3631 /* set the defaults */
3632 cdrom_sysctl_settings.autoclose = autoclose;
3633 cdrom_sysctl_settings.autoeject = autoeject;
3634 cdrom_sysctl_settings.debug = debug;
3635 cdrom_sysctl_settings.lock = lockdoor;
3636 cdrom_sysctl_settings.check = check_media_type;
3637
3638 initialized = 1;
3639 }
3640
3641 static void cdrom_sysctl_unregister(void)
3642 {
3643 if (cdrom_sysctl_header)
3644 unregister_sysctl_table(cdrom_sysctl_header);
3645 }
3646
3647 #else /* CONFIG_SYSCTL */
3648
3649 static void cdrom_sysctl_register(void)
3650 {
3651 }
3652
3653 static void cdrom_sysctl_unregister(void)
3654 {
3655 }
3656
3657 #endif /* CONFIG_SYSCTL */
3658
3659 static int __init cdrom_init(void)
3660 {
3661 cdrom_sysctl_register();
3662
3663 return 0;
3664 }
3665
3666 static void __exit cdrom_exit(void)
3667 {
3668 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3669 cdrom_sysctl_unregister();
3670 }
3671
3672 module_init(cdrom_init);
3673 module_exit(cdrom_exit);
3674 MODULE_LICENSE("GPL");
linux-next