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code style scripts/checkpatch.pl (linux-3.9-rc1) formatting
[linux-2.6.32.60-moxart.git] / drivers / cdrom / cdrom.c
bloba4592ecd5cb09c9a9f6f510c15fa768e1a56f1f6
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 cgc.data_direction = CGC_DATA_READ;
2061 while (nframes > 0) {
2062 if (nr > nframes)
2063 nr = nframes;
2064
2065 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2066 if (ret)
2067 break;
2068 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2069 ret = -EFAULT;
2070 break;
2071 }
2072 ubuf += CD_FRAMESIZE_RAW * nr;
2073 nframes -= nr;
2074 lba += nr;
2075 }
2076 kfree(cgc.buffer);
2077 return ret;
2078 }
2079
2080 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2081 int lba, int nframes)
2082 {
2083 struct request_queue *q = cdi->disk->queue;
2084 struct request *rq;
2085 struct bio *bio;
2086 unsigned int len;
2087 int nr, ret = 0;
2088
2089 if (!q)
2090 return -ENXIO;
2091
2092 cdi->last_sense = 0;
2093
2094 while (nframes) {
2095 nr = nframes;
2096 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2097 nr = 1;
2098 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2099 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2100
2101 len = nr * CD_FRAMESIZE_RAW;
2102
2103 rq = blk_get_request(q, READ, GFP_KERNEL);
2104 if (!rq) {
2105 ret = -ENOMEM;
2106 break;
2107 }
2108
2109 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2110 if (ret) {
2111 blk_put_request(rq);
2112 break;
2113 }
2114
2115 rq->cmd[0] = GPCMD_READ_CD;
2116 rq->cmd[1] = 1 << 2;
2117 rq->cmd[2] = (lba >> 24) & 0xff;
2118 rq->cmd[3] = (lba >> 16) & 0xff;
2119 rq->cmd[4] = (lba >> 8) & 0xff;
2120 rq->cmd[5] = lba & 0xff;
2121 rq->cmd[6] = (nr >> 16) & 0xff;
2122 rq->cmd[7] = (nr >> 8) & 0xff;
2123 rq->cmd[8] = nr & 0xff;
2124 rq->cmd[9] = 0xf8;
2125
2126 rq->cmd_len = 12;
2127 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2128 rq->timeout = 60 * HZ;
2129 bio = rq->bio;
2130
2131 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2132 struct request_sense *s = rq->sense;
2133 ret = -EIO;
2134 cdi->last_sense = s->sense_key;
2135 }
2136
2137 if (blk_rq_unmap_user(bio))
2138 ret = -EFAULT;
2139 blk_put_request(rq);
2140
2141 if (ret)
2142 break;
2143
2144 nframes -= nr;
2145 lba += nr;
2146 ubuf += len;
2147 }
2148
2149 return ret;
2150 }
2151
2152 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2153 int lba, int nframes)
2154 {
2155 int ret;
2156
2157 if (cdi->cdda_method == CDDA_OLD)
2158 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2159
2160 retry:
2161 /*
2162 * for anything else than success and io error, we need to retry
2163 */
2164 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2165 if (!ret || ret != -EIO)
2166 return ret;
2167
2168 /*
2169 * I've seen drives get sense 4/8/3 udma crc errors on multi
2170 * frame dma, so drop to single frame dma if we need to
2171 */
2172 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2173 printk("cdrom: dropping to single frame dma\n");
2174 cdi->cdda_method = CDDA_BPC_SINGLE;
2175 goto retry;
2176 }
2177
2178 /*
2179 * so we have an io error of some sort with multi frame dma. if the
2180 * condition wasn't a hardware error
2181 * problems, not for any error
2182 */
2183 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2184 return ret;
2185
2186 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2187 cdi->cdda_method = CDDA_OLD;
2188 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2189 }
2190
2191 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2192 void __user *argp)
2193 {
2194 struct cdrom_multisession ms_info;
2195 u8 requested_format;
2196 int ret;
2197
2198 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2199
2200 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2201 return -ENOSYS;
2202
2203 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2204 return -EFAULT;
2205
2206 requested_format = ms_info.addr_format;
2207 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2208 return -EINVAL;
2209 ms_info.addr_format = CDROM_LBA;
2210
2211 ret = cdi->ops->get_last_session(cdi, &ms_info);
2212 if (ret)
2213 return ret;
2214
2215 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2216
2217 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2218 return -EFAULT;
2219
2220 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2221 return 0;
2222 }
2223
2224 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2225 {
2226 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2227
2228 if (!CDROM_CAN(CDC_OPEN_TRAY))
2229 return -ENOSYS;
2230 if (cdi->use_count != 1 || keeplocked)
2231 return -EBUSY;
2232 if (CDROM_CAN(CDC_LOCK)) {
2233 int ret = cdi->ops->lock_door(cdi, 0);
2234 if (ret)
2235 return ret;
2236 }
2237
2238 return cdi->ops->tray_move(cdi, 1);
2239 }
2240
2241 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2242 {
2243 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2244
2245 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2246 return -ENOSYS;
2247 return cdi->ops->tray_move(cdi, 0);
2248 }
2249
2250 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2251 unsigned long arg)
2252 {
2253 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2254
2255 if (!CDROM_CAN(CDC_OPEN_TRAY))
2256 return -ENOSYS;
2257 if (keeplocked)
2258 return -EBUSY;
2259
2260 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2261 if (arg)
2262 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2263 return 0;
2264 }
2265
2266 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2267 unsigned long arg)
2268 {
2269 struct cdrom_changer_info *info;
2270 int ret;
2271
2272 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2273
2274 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2275 return -ENOSYS;
2276
2277 /* cannot select disc or select current disc */
2278 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2279 return media_changed(cdi, 1);
2280
2281 if ((unsigned int)arg >= cdi->capacity)
2282 return -EINVAL;
2283
2284 info = kmalloc(sizeof(*info), GFP_KERNEL);
2285 if (!info)
2286 return -ENOMEM;
2287
2288 ret = cdrom_read_mech_status(cdi, info);
2289 if (!ret)
2290 ret = info->slots[arg].change;
2291 kfree(info);
2292 return ret;
2293 }
2294
2295 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2296 unsigned long arg)
2297 {
2298 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2299
2300 /*
2301 * Options need to be in sync with capability.
2302 * Too late for that, so we have to check each one separately.
2303 */
2304 switch (arg) {
2305 case CDO_USE_FFLAGS:
2306 case CDO_CHECK_TYPE:
2307 break;
2308 case CDO_LOCK:
2309 if (!CDROM_CAN(CDC_LOCK))
2310 return -ENOSYS;
2311 break;
2312 case 0:
2313 return cdi->options;
2314 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2315 default:
2316 if (!CDROM_CAN(arg))
2317 return -ENOSYS;
2318 }
2319 cdi->options |= (int) arg;
2320 return cdi->options;
2321 }
2322
2323 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2324 unsigned long arg)
2325 {
2326 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2327
2328 cdi->options &= ~(int) arg;
2329 return cdi->options;
2330 }
2331
2332 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2333 unsigned long arg)
2334 {
2335 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2336
2337 if (!CDROM_CAN(CDC_SELECT_SPEED))
2338 return -ENOSYS;
2339 return cdi->ops->select_speed(cdi, arg);
2340 }
2341
2342 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2343 unsigned long arg)
2344 {
2345 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2346
2347 if (!CDROM_CAN(CDC_SELECT_DISC))
2348 return -ENOSYS;
2349
2350 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2351 if ((int)arg >= cdi->capacity)
2352 return -EINVAL;
2353 }
2354
2355 /*
2356 * ->select_disc is a hook to allow a driver-specific way of
2357 * seleting disc. However, since there is no equivalent hook for
2358 * cdrom_slot_status this may not actually be useful...
2359 */
2360 if (cdi->ops->select_disc)
2361 return cdi->ops->select_disc(cdi, arg);
2362
2363 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2364 return cdrom_select_disc(cdi, arg);
2365 }
2366
2367 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2368 struct block_device *bdev)
2369 {
2370 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2371
2372 if (!capable(CAP_SYS_ADMIN))
2373 return -EACCES;
2374 if (!CDROM_CAN(CDC_RESET))
2375 return -ENOSYS;
2376 invalidate_bdev(bdev);
2377 return cdi->ops->reset(cdi);
2378 }
2379
2380 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2381 unsigned long arg)
2382 {
2383 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2384
2385 if (!CDROM_CAN(CDC_LOCK))
2386 return -EDRIVE_CANT_DO_THIS;
2387
2388 keeplocked = arg ? 1 : 0;
2389
2390 /*
2391 * Don't unlock the door on multiple opens by default, but allow
2392 * root to do so.
2393 */
2394 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2395 return -EBUSY;
2396 return cdi->ops->lock_door(cdi, arg);
2397 }
2398
2399 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2400 unsigned long arg)
2401 {
2402 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2403
2404 if (!capable(CAP_SYS_ADMIN))
2405 return -EACCES;
2406 debug = arg ? 1 : 0;
2407 return debug;
2408 }
2409
2410 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2411 {
2412 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2413 return (cdi->ops->capability & ~cdi->mask);
2414 }
2415
2416 /*
2417 * The following function is implemented, although very few audio
2418 * discs give Universal Product Code information, which should just be
2419 * the Medium Catalog Number on the box. Note, that the way the code
2420 * is written on the CD is /not/ uniform across all discs!
2421 */
2422 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2423 void __user *argp)
2424 {
2425 struct cdrom_mcn mcn;
2426 int ret;
2427
2428 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2429
2430 if (!(cdi->ops->capability & CDC_MCN))
2431 return -ENOSYS;
2432 ret = cdi->ops->get_mcn(cdi, &mcn);
2433 if (ret)
2434 return ret;
2435
2436 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2437 return -EFAULT;
2438 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2439 return 0;
2440 }
2441
2442 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2443 unsigned long arg)
2444 {
2445 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2446
2447 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2448 return -ENOSYS;
2449 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2450 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2451 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2452 if (((int)arg >= cdi->capacity))
2453 return -EINVAL;
2454 return cdrom_slot_status(cdi, arg);
2455 }
2456
2457 /*
2458 * Ok, this is where problems start. The current interface for the
2459 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2460 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2461 * is often the case, it is also very common for CDs to have some tracks
2462 * with data, and some tracks with audio. Just because I feel like it,
2463 * I declare the following to be the best way to cope. If the CD has ANY
2464 * data tracks on it, it will be returned as a data CD. If it has any XA
2465 * tracks, I will return it as that. Now I could simplify this interface
2466 * by combining these returns with the above, but this more clearly
2467 * demonstrates the problem with the current interface. Too bad this
2468 * wasn't designed to use bitmasks... -Erik
2469 *
2470 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2471 * User level programmers might feel the ioctl is not very useful.
2472 * ---david
2473 */
2474 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2475 {
2476 tracktype tracks;
2477
2478 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2479
2480 cdrom_count_tracks(cdi, &tracks);
2481 if (tracks.error)
2482 return tracks.error;
2483
2484 /* Policy mode on */
2485 if (tracks.audio > 0) {
2486 if (!tracks.data && !tracks.cdi && !tracks.xa)
2487 return CDS_AUDIO;
2488 else
2489 return CDS_MIXED;
2490 }
2491
2492 if (tracks.cdi > 0)
2493 return CDS_XA_2_2;
2494 if (tracks.xa > 0)
2495 return CDS_XA_2_1;
2496 if (tracks.data > 0)
2497 return CDS_DATA_1;
2498 /* Policy mode off */
2499
2500 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2501 return CDS_NO_INFO;
2502 }
2503
2504 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2505 {
2506 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2507 return cdi->capacity;
2508 }
2509
2510 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2511 void __user *argp)
2512 {
2513 struct cdrom_subchnl q;
2514 u8 requested, back;
2515 int ret;
2516
2517 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2518
2519 if (copy_from_user(&q, argp, sizeof(q)))
2520 return -EFAULT;
2521
2522 requested = q.cdsc_format;
2523 if (requested != CDROM_MSF && requested != CDROM_LBA)
2524 return -EINVAL;
2525 q.cdsc_format = CDROM_MSF;
2526
2527 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2528 if (ret)
2529 return ret;
2530
2531 back = q.cdsc_format; /* local copy */
2532 sanitize_format(&q.cdsc_absaddr, &back, requested);
2533 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2534
2535 if (copy_to_user(argp, &q, sizeof(q)))
2536 return -EFAULT;
2537 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2538 return 0;
2539 }
2540
2541 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2542 void __user *argp)
2543 {
2544 struct cdrom_tochdr header;
2545 int ret;
2546
2547 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2548
2549 if (copy_from_user(&header, argp, sizeof(header)))
2550 return -EFAULT;
2551
2552 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2553 if (ret)
2554 return ret;
2555
2556 if (copy_to_user(argp, &header, sizeof(header)))
2557 return -EFAULT;
2558 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2559 return 0;
2560 }
2561
2562 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2563 void __user *argp)
2564 {
2565 struct cdrom_tocentry entry;
2566 u8 requested_format;
2567 int ret;
2568
2569 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2570
2571 if (copy_from_user(&entry, argp, sizeof(entry)))
2572 return -EFAULT;
2573
2574 requested_format = entry.cdte_format;
2575 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2576 return -EINVAL;
2577 /* make interface to low-level uniform */
2578 entry.cdte_format = CDROM_MSF;
2579 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2580 if (ret)
2581 return ret;
2582 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2583
2584 if (copy_to_user(argp, &entry, sizeof(entry)))
2585 return -EFAULT;
2586 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2587 return 0;
2588 }
2589
2590 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592 {
2593 struct cdrom_msf msf;
2594
2595 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2596
2597 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2598 return -ENOSYS;
2599 if (copy_from_user(&msf, argp, sizeof(msf)))
2600 return -EFAULT;
2601 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2602 }
2603
2604 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2605 void __user *argp)
2606 {
2607 struct cdrom_ti ti;
2608 int ret;
2609
2610 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2611
2612 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2613 return -ENOSYS;
2614 if (copy_from_user(&ti, argp, sizeof(ti)))
2615 return -EFAULT;
2616
2617 ret = check_for_audio_disc(cdi, cdi->ops);
2618 if (ret)
2619 return ret;
2620 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2621 }
2622 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2623 void __user *argp)
2624 {
2625 struct cdrom_volctrl volume;
2626
2627 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2628
2629 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2630 return -ENOSYS;
2631 if (copy_from_user(&volume, argp, sizeof(volume)))
2632 return -EFAULT;
2633 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2634 }
2635
2636 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2637 void __user *argp)
2638 {
2639 struct cdrom_volctrl volume;
2640 int ret;
2641
2642 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2643
2644 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2645 return -ENOSYS;
2646
2647 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2648 if (ret)
2649 return ret;
2650
2651 if (copy_to_user(argp, &volume, sizeof(volume)))
2652 return -EFAULT;
2653 return 0;
2654 }
2655
2656 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2657 unsigned int cmd)
2658 {
2659 int ret;
2660
2661 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2662
2663 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2664 return -ENOSYS;
2665 ret = check_for_audio_disc(cdi, cdi->ops);
2666 if (ret)
2667 return ret;
2668 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2669 }
2670
2671 /*
2672 * Just about every imaginable ioctl is supported in the Uniform layer
2673 * these days.
2674 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2675 */
2676 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2677 fmode_t mode, unsigned int cmd, unsigned long arg)
2678 {
2679 void __user *argp = (void __user *)arg;
2680 int ret;
2681
2682 /*
2683 * Try the generic SCSI command ioctl's first.
2684 */
2685 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
2686 if (ret != -ENOTTY)
2687 return ret;
2688
2689 switch (cmd) {
2690 case CDROMMULTISESSION:
2691 return cdrom_ioctl_multisession(cdi, argp);
2692 case CDROMEJECT:
2693 return cdrom_ioctl_eject(cdi);
2694 case CDROMCLOSETRAY:
2695 return cdrom_ioctl_closetray(cdi);
2696 case CDROMEJECT_SW:
2697 return cdrom_ioctl_eject_sw(cdi, arg);
2698 case CDROM_MEDIA_CHANGED:
2699 return cdrom_ioctl_media_changed(cdi, arg);
2700 case CDROM_SET_OPTIONS:
2701 return cdrom_ioctl_set_options(cdi, arg);
2702 case CDROM_CLEAR_OPTIONS:
2703 return cdrom_ioctl_clear_options(cdi, arg);
2704 case CDROM_SELECT_SPEED:
2705 return cdrom_ioctl_select_speed(cdi, arg);
2706 case CDROM_SELECT_DISC:
2707 return cdrom_ioctl_select_disc(cdi, arg);
2708 case CDROMRESET:
2709 return cdrom_ioctl_reset(cdi, bdev);
2710 case CDROM_LOCKDOOR:
2711 return cdrom_ioctl_lock_door(cdi, arg);
2712 case CDROM_DEBUG:
2713 return cdrom_ioctl_debug(cdi, arg);
2714 case CDROM_GET_CAPABILITY:
2715 return cdrom_ioctl_get_capability(cdi);
2716 case CDROM_GET_MCN:
2717 return cdrom_ioctl_get_mcn(cdi, argp);
2718 case CDROM_DRIVE_STATUS:
2719 return cdrom_ioctl_drive_status(cdi, arg);
2720 case CDROM_DISC_STATUS:
2721 return cdrom_ioctl_disc_status(cdi);
2722 case CDROM_CHANGER_NSLOTS:
2723 return cdrom_ioctl_changer_nslots(cdi);
2724 }
2725
2726 /*
2727 * Use the ioctls that are implemented through the generic_packet()
2728 * interface. this may look at bit funny, but if -ENOTTY is
2729 * returned that particular ioctl is not implemented and we
2730 * let it go through the device specific ones.
2731 */
2732 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2733 ret = mmc_ioctl(cdi, cmd, arg);
2734 if (ret != -ENOTTY)
2735 return ret;
2736 }
2737
2738 /*
2739 * Note: most of the cdinfo() calls are commented out here,
2740 * because they fill up the sys log when CD players poll
2741 * the drive.
2742 */
2743 switch (cmd) {
2744 case CDROMSUBCHNL:
2745 return cdrom_ioctl_get_subchnl(cdi, argp);
2746 case CDROMREADTOCHDR:
2747 return cdrom_ioctl_read_tochdr(cdi, argp);
2748 case CDROMREADTOCENTRY:
2749 return cdrom_ioctl_read_tocentry(cdi, argp);
2750 case CDROMPLAYMSF:
2751 return cdrom_ioctl_play_msf(cdi, argp);
2752 case CDROMPLAYTRKIND:
2753 return cdrom_ioctl_play_trkind(cdi, argp);
2754 case CDROMVOLCTRL:
2755 return cdrom_ioctl_volctrl(cdi, argp);
2756 case CDROMVOLREAD:
2757 return cdrom_ioctl_volread(cdi, argp);
2758 case CDROMSTART:
2759 case CDROMSTOP:
2760 case CDROMPAUSE:
2761 case CDROMRESUME:
2762 return cdrom_ioctl_audioctl(cdi, cmd);
2763 }
2764
2765 return -ENOSYS;
2766 }
2767
2768 /*
2769 * Required when we need to use READ_10 to issue other than 2048 block
2770 * reads
2771 */
2772 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2773 {
2774 struct cdrom_device_ops *cdo = cdi->ops;
2775 struct packet_command cgc;
2776 struct modesel_head mh;
2777
2778 memset(&mh, 0, sizeof(mh));
2779 mh.block_desc_length = 0x08;
2780 mh.block_length_med = (size >> 8) & 0xff;
2781 mh.block_length_lo = size & 0xff;
2782
2783 memset(&cgc, 0, sizeof(cgc));
2784 cgc.cmd[0] = 0x15;
2785 cgc.cmd[1] = 1 << 4;
2786 cgc.cmd[4] = 12;
2787 cgc.buflen = sizeof(mh);
2788 cgc.buffer = (char *) &mh;
2789 cgc.data_direction = CGC_DATA_WRITE;
2790 mh.block_desc_length = 0x08;
2791 mh.block_length_med = (size >> 8) & 0xff;
2792 mh.block_length_lo = size & 0xff;
2793
2794 return cdo->generic_packet(cdi, &cgc);
2795 }
2796
2797 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2798 void __user *arg,
2799 struct packet_command *cgc,
2800 int cmd)
2801 {
2802 struct request_sense sense;
2803 struct cdrom_msf msf;
2804 int blocksize = 0, format = 0, lba;
2805 int ret;
2806
2807 switch (cmd) {
2808 case CDROMREADRAW:
2809 blocksize = CD_FRAMESIZE_RAW;
2810 break;
2811 case CDROMREADMODE1:
2812 blocksize = CD_FRAMESIZE;
2813 format = 2;
2814 break;
2815 case CDROMREADMODE2:
2816 blocksize = CD_FRAMESIZE_RAW0;
2817 break;
2818 }
2819 IOCTL_IN(arg, struct cdrom_msf, msf);
2820 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2821 /* FIXME: we need upper bound checking, too!! */
2822 if (lba < 0)
2823 return -EINVAL;
2824
2825 cgc->buffer = kmalloc(blocksize, GFP_KERNEL);
2826 if (cgc->buffer == NULL)
2827 return -ENOMEM;
2828
2829 memset(&sense, 0, sizeof(sense));
2830 cgc->sense = &sense;
2831 cgc->data_direction = CGC_DATA_READ;
2832 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2833 if (ret && sense.sense_key == 0x05 &&
2834 sense.asc == 0x20 &&
2835 sense.ascq == 0x00) {
2836 /*
2837 * SCSI-II devices are not required to support
2838 * READ_CD, so let's try switching block size
2839 */
2840 /* FIXME: switch back again... */
2841 ret = cdrom_switch_blocksize(cdi, blocksize);
2842 if (ret)
2843 goto out;
2844 cgc->sense = NULL;
2845 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2846 ret |= cdrom_switch_blocksize(cdi, blocksize);
2847 }
2848 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2849 ret = -EFAULT;
2850 out:
2851 kfree(cgc->buffer);
2852 return ret;
2853 }
2854
2855 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2856 void __user *arg)
2857 {
2858 struct cdrom_read_audio ra;
2859 int lba;
2860
2861 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2862
2863 if (ra.addr_format == CDROM_MSF)
2864 lba = msf_to_lba(ra.addr.msf.minute,
2865 ra.addr.msf.second,
2866 ra.addr.msf.frame);
2867 else if (ra.addr_format == CDROM_LBA)
2868 lba = ra.addr.lba;
2869 else
2870 return -EINVAL;
2871
2872 /* FIXME: we need upper bound checking, too!! */
2873 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2874 return -EINVAL;
2875
2876 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2877 }
2878
2879 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2880 void __user *arg)
2881 {
2882 int ret;
2883 struct cdrom_subchnl q;
2884 u_char requested, back;
2885 IOCTL_IN(arg, struct cdrom_subchnl, q);
2886 requested = q.cdsc_format;
2887 if (!((requested == CDROM_MSF) ||
2888 (requested == CDROM_LBA)))
2889 return -EINVAL;
2890 q.cdsc_format = CDROM_MSF;
2891 ret = cdrom_read_subchannel(cdi, &q, 0);
2892 if (ret)
2893 return ret;
2894 back = q.cdsc_format; /* local copy */
2895 sanitize_format(&q.cdsc_absaddr, &back, requested);
2896 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2897 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2898 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2899 return 0;
2900 }
2901
2902 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2903 void __user *arg,
2904 struct packet_command *cgc)
2905 {
2906 struct cdrom_device_ops *cdo = cdi->ops;
2907 struct cdrom_msf msf;
2908 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2909 IOCTL_IN(arg, struct cdrom_msf, msf);
2910 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2911 cgc->cmd[3] = msf.cdmsf_min0;
2912 cgc->cmd[4] = msf.cdmsf_sec0;
2913 cgc->cmd[5] = msf.cdmsf_frame0;
2914 cgc->cmd[6] = msf.cdmsf_min1;
2915 cgc->cmd[7] = msf.cdmsf_sec1;
2916 cgc->cmd[8] = msf.cdmsf_frame1;
2917 cgc->data_direction = CGC_DATA_NONE;
2918 return cdo->generic_packet(cdi, cgc);
2919 }
2920
2921 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2922 void __user *arg,
2923 struct packet_command *cgc)
2924 {
2925 struct cdrom_device_ops *cdo = cdi->ops;
2926 struct cdrom_blk blk;
2927 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2928 IOCTL_IN(arg, struct cdrom_blk, blk);
2929 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
2930 cgc->cmd[2] = (blk.from >> 24) & 0xff;
2931 cgc->cmd[3] = (blk.from >> 16) & 0xff;
2932 cgc->cmd[4] = (blk.from >> 8) & 0xff;
2933 cgc->cmd[5] = blk.from & 0xff;
2934 cgc->cmd[7] = (blk.len >> 8) & 0xff;
2935 cgc->cmd[8] = blk.len & 0xff;
2936 cgc->data_direction = CGC_DATA_NONE;
2937 return cdo->generic_packet(cdi, cgc);
2938 }
2939
2940 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
2941 void __user *arg,
2942 struct packet_command *cgc,
2943 unsigned int cmd)
2944 {
2945 struct cdrom_volctrl volctrl;
2946 unsigned char buffer[32];
2947 char mask[sizeof(buffer)];
2948 unsigned short offset;
2949 int ret;
2950
2951 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2952
2953 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2954
2955 cgc->buffer = buffer;
2956 cgc->buflen = 24;
2957 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
2958 if (ret)
2959 return ret;
2960
2961 /* originally the code depended on buffer[1] to determine
2962 how much data is available for transfer. buffer[1] is
2963 unfortunately ambigious and the only reliable way seem
2964 to be to simply skip over the block descriptor... */
2965 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
2966
2967 if (offset + 16 > sizeof(buffer))
2968 return -E2BIG;
2969
2970 if (offset + 16 > cgc->buflen) {
2971 cgc->buflen = offset + 16;
2972 ret = cdrom_mode_sense(cdi, cgc,
2973 GPMODE_AUDIO_CTL_PAGE, 0);
2974 if (ret)
2975 return ret;
2976 }
2977
2978 /* sanity check */
2979 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2980 buffer[offset + 1] < 14)
2981 return -EINVAL;
2982
2983 /* now we have the current volume settings. if it was only
2984 a CDROMVOLREAD, return these values */
2985 if (cmd == CDROMVOLREAD) {
2986 volctrl.channel0 = buffer[offset+9];
2987 volctrl.channel1 = buffer[offset+11];
2988 volctrl.channel2 = buffer[offset+13];
2989 volctrl.channel3 = buffer[offset+15];
2990 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2991 return 0;
2992 }
2993
2994 /* get the volume mask */
2995 cgc->buffer = mask;
2996 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
2997 if (ret)
2998 return ret;
2999
3000 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3001 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3002 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3003 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3004
3005 /* set volume */
3006 cgc->buffer = buffer + offset - 8;
3007 memset(cgc->buffer, 0, 8);
3008 return cdrom_mode_select(cdi, cgc);
3009 }
3010
3011 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3012 struct packet_command *cgc,
3013 int cmd)
3014 {
3015 struct cdrom_device_ops *cdo = cdi->ops;
3016 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3017 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3018 cgc->cmd[1] = 1;
3019 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3020 cgc->data_direction = CGC_DATA_NONE;
3021 return cdo->generic_packet(cdi, cgc);
3022 }
3023
3024 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3025 struct packet_command *cgc,
3026 int cmd)
3027 {
3028 struct cdrom_device_ops *cdo = cdi->ops;
3029 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3030 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3031 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3032 cgc->data_direction = CGC_DATA_NONE;
3033 return cdo->generic_packet(cdi, cgc);
3034 }
3035
3036 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3037 void __user *arg,
3038 struct packet_command *cgc)
3039 {
3040 int ret;
3041 dvd_struct *s;
3042 int size = sizeof(dvd_struct);
3043
3044 if (!CDROM_CAN(CDC_DVD))
3045 return -ENOSYS;
3046
3047 s = kmalloc(size, GFP_KERNEL);
3048 if (!s)
3049 return -ENOMEM;
3050
3051 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3052 if (copy_from_user(s, arg, size)) {
3053 kfree(s);
3054 return -EFAULT;
3055 }
3056
3057 ret = dvd_read_struct(cdi, s, cgc);
3058 if (ret)
3059 goto out;
3060
3061 if (copy_to_user(arg, s, size))
3062 ret = -EFAULT;
3063 out:
3064 kfree(s);
3065 return ret;
3066 }
3067
3068 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3069 void __user *arg)
3070 {
3071 int ret;
3072 dvd_authinfo ai;
3073 if (!CDROM_CAN(CDC_DVD))
3074 return -ENOSYS;
3075 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3076 IOCTL_IN(arg, dvd_authinfo, ai);
3077 ret = dvd_do_auth(cdi, &ai);
3078 if (ret)
3079 return ret;
3080 IOCTL_OUT(arg, dvd_authinfo, ai);
3081 return 0;
3082 }
3083
3084 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3085 void __user *arg)
3086 {
3087 int ret;
3088 long next = 0;
3089 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3090 ret = cdrom_get_next_writable(cdi, &next);
3091 if (ret)
3092 return ret;
3093 IOCTL_OUT(arg, long, next);
3094 return 0;
3095 }
3096
3097 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3098 void __user *arg)
3099 {
3100 int ret;
3101 long last = 0;
3102 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3103 ret = cdrom_get_last_written(cdi, &last);
3104 if (ret)
3105 return ret;
3106 IOCTL_OUT(arg, long, last);
3107 return 0;
3108 }
3109
3110 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3111 unsigned long arg)
3112 {
3113 struct packet_command cgc;
3114 void __user *userptr = (void __user *)arg;
3115
3116 memset(&cgc, 0, sizeof(cgc));
3117
3118 /* build a unified command and queue it through
3119 cdo->generic_packet() */
3120 switch (cmd) {
3121 case CDROMREADRAW:
3122 case CDROMREADMODE1:
3123 case CDROMREADMODE2:
3124 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3125 case CDROMREADAUDIO:
3126 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3127 case CDROMSUBCHNL:
3128 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3129 case CDROMPLAYMSF:
3130 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3131 case CDROMPLAYBLK:
3132 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3133 case CDROMVOLCTRL:
3134 case CDROMVOLREAD:
3135 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3136 case CDROMSTART:
3137 case CDROMSTOP:
3138 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3139 case CDROMPAUSE:
3140 case CDROMRESUME:
3141 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3142 case DVD_READ_STRUCT:
3143 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3144 case DVD_AUTH:
3145 return mmc_ioctl_dvd_auth(cdi, userptr);
3146 case CDROM_NEXT_WRITABLE:
3147 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3148 case CDROM_LAST_WRITTEN:
3149 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3150 }
3151
3152 return -ENOTTY;
3153 }
3154
3155 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3156 track_information *ti)
3157 {
3158 struct cdrom_device_ops *cdo = cdi->ops;
3159 struct packet_command cgc;
3160 int ret, buflen;
3161
3162 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3163 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3164 cgc.cmd[1] = type & 3;
3165 cgc.cmd[4] = (track & 0xff00) >> 8;
3166 cgc.cmd[5] = track & 0xff;
3167 cgc.cmd[8] = 8;
3168 cgc.quiet = 1;
3169
3170 if ((ret = cdo->generic_packet(cdi, &cgc)))
3171 return ret;
3172
3173 buflen = be16_to_cpu(ti->track_information_length) +
3174 sizeof(ti->track_information_length);
3175
3176 if (buflen > sizeof(track_information))
3177 buflen = sizeof(track_information);
3178
3179 cgc.cmd[8] = cgc.buflen = buflen;
3180 if ((ret = cdo->generic_packet(cdi, &cgc)))
3181 return ret;
3182
3183 /* return actual fill size */
3184 return buflen;
3185 }
3186
3187 /* requires CD R/RW */
3188 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3189 {
3190 struct cdrom_device_ops *cdo = cdi->ops;
3191 struct packet_command cgc;
3192 int ret, buflen;
3193
3194 /* set up command and get the disc info */
3195 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3196 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3197 cgc.cmd[8] = cgc.buflen = 2;
3198 cgc.quiet = 1;
3199
3200 if ((ret = cdo->generic_packet(cdi, &cgc)))
3201 return ret;
3202
3203 /* not all drives have the same disc_info length, so requeue
3204 * packet with the length the drive tells us it can supply
3205 */
3206 buflen = be16_to_cpu(di->disc_information_length) +
3207 sizeof(di->disc_information_length);
3208
3209 if (buflen > sizeof(disc_information))
3210 buflen = sizeof(disc_information);
3211
3212 cgc.cmd[8] = cgc.buflen = buflen;
3213 if ((ret = cdo->generic_packet(cdi, &cgc)))
3214 return ret;
3215
3216 /* return actual fill size */
3217 return buflen;
3218 }
3219
3220 /* return the last written block on the CD-R media. this is for the udf
3221 file system. */
3222 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3223 {
3224 struct cdrom_tocentry toc;
3225 disc_information di;
3226 track_information ti;
3227 __u32 last_track;
3228 int ret = -1, ti_size;
3229
3230 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3231 goto use_toc;
3232
3233 ret = cdrom_get_disc_info(cdi, &di);
3234 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3235 + sizeof(di.last_track_lsb)))
3236 goto use_toc;
3237
3238 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3239 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3240 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3241 if (ti_size < (int)offsetof(typeof(ti), track_start))
3242 goto use_toc;
3243
3244 /* if this track is blank, try the previous. */
3245 if (ti.blank) {
3246 if (last_track==1)
3247 goto use_toc;
3248 last_track--;
3249 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3250 }
3251
3252 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3253 + sizeof(ti.track_size)))
3254 goto use_toc;
3255
3256 /* if last recorded field is valid, return it. */
3257 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3258 + sizeof(ti.last_rec_address))) {
3259 *last_written = be32_to_cpu(ti.last_rec_address);
3260 } else {
3261 /* make it up instead */
3262 *last_written = be32_to_cpu(ti.track_start) +
3263 be32_to_cpu(ti.track_size);
3264 if (ti.free_blocks)
3265 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3266 }
3267 return 0;
3268
3269 /* this is where we end up if the drive either can't do a
3270 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3271 it doesn't give enough information or fails. then we return
3272 the toc contents. */
3273 use_toc:
3274 toc.cdte_format = CDROM_MSF;
3275 toc.cdte_track = CDROM_LEADOUT;
3276 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3277 return ret;
3278 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3279 *last_written = toc.cdte_addr.lba;
3280 return 0;
3281 }
3282
3283 /* return the next writable block. also for udf file system. */
3284 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3285 {
3286 disc_information di;
3287 track_information ti;
3288 __u16 last_track;
3289 int ret, ti_size;
3290
3291 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3292 goto use_last_written;
3293
3294 ret = cdrom_get_disc_info(cdi, &di);
3295 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3296 + sizeof(di.last_track_lsb))
3297 goto use_last_written;
3298
3299 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3300 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3301 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3302 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3303 goto use_last_written;
3304
3305 /* if this track is blank, try the previous. */
3306 if (ti.blank) {
3307 if (last_track == 1)
3308 goto use_last_written;
3309 last_track--;
3310 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3311 if (ti_size < 0)
3312 goto use_last_written;
3313 }
3314
3315 /* if next recordable address field is valid, use it. */
3316 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3317 + sizeof(ti.next_writable)) {
3318 *next_writable = be32_to_cpu(ti.next_writable);
3319 return 0;
3320 }
3321
3322 use_last_written:
3323 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3324 *next_writable = 0;
3325 return ret;
3326 } else {
3327 *next_writable += 7;
3328 return 0;
3329 }
3330 }
3331
3332 EXPORT_SYMBOL(cdrom_get_last_written);
3333 EXPORT_SYMBOL(register_cdrom);
3334 EXPORT_SYMBOL(unregister_cdrom);
3335 EXPORT_SYMBOL(cdrom_open);
3336 EXPORT_SYMBOL(cdrom_release);
3337 EXPORT_SYMBOL(cdrom_ioctl);
3338 EXPORT_SYMBOL(cdrom_media_changed);
3339 EXPORT_SYMBOL(cdrom_number_of_slots);
3340 EXPORT_SYMBOL(cdrom_mode_select);
3341 EXPORT_SYMBOL(cdrom_mode_sense);
3342 EXPORT_SYMBOL(init_cdrom_command);
3343 EXPORT_SYMBOL(cdrom_get_media_event);
3344
3345 #ifdef CONFIG_SYSCTL
3346
3347 #define CDROM_STR_SIZE 1000
3348
3349 static struct cdrom_sysctl_settings {
3350 char info[CDROM_STR_SIZE]; /* general info */
3351 int autoclose; /* close tray upon mount, etc */
3352 int autoeject; /* eject on umount */
3353 int debug; /* turn on debugging messages */
3354 int lock; /* lock the door on device open */
3355 int check; /* check media type */
3356 } cdrom_sysctl_settings;
3357
3358 enum cdrom_print_option {
3359 CTL_NAME,
3360 CTL_SPEED,
3361 CTL_SLOTS,
3362 CTL_CAPABILITY
3363 };
3364
3365 static int cdrom_print_info(const char *header, int val, char *info,
3366 int *pos, enum cdrom_print_option option)
3367 {
3368 const int max_size = sizeof(cdrom_sysctl_settings.info);
3369 struct cdrom_device_info *cdi;
3370 int ret;
3371
3372 ret = scnprintf(info + *pos, max_size - *pos, header);
3373 if (!ret)
3374 return 1;
3375
3376 *pos += ret;
3377
3378 list_for_each_entry(cdi, &cdrom_list, list) {
3379 switch (option) {
3380 case CTL_NAME:
3381 ret = scnprintf(info + *pos, max_size - *pos,
3382 "\t%s", cdi->name);
3383 break;
3384 case CTL_SPEED:
3385 ret = scnprintf(info + *pos, max_size - *pos,
3386 "\t%d", cdi->speed);
3387 break;
3388 case CTL_SLOTS:
3389 ret = scnprintf(info + *pos, max_size - *pos,
3390 "\t%d", cdi->capacity);
3391 break;
3392 case CTL_CAPABILITY:
3393 ret = scnprintf(info + *pos, max_size - *pos,
3394 "\t%d", CDROM_CAN(val) != 0);
3395 break;
3396 default:
3397 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3398 return 1;
3399 }
3400 if (!ret)
3401 return 1;
3402 *pos += ret;
3403 }
3404
3405 return 0;
3406 }
3407
3408 static int cdrom_sysctl_info(ctl_table *ctl, int write,
3409 void __user *buffer, size_t *lenp, loff_t *ppos)
3410 {
3411 int pos;
3412 char *info = cdrom_sysctl_settings.info;
3413 const int max_size = sizeof(cdrom_sysctl_settings.info);
3414
3415 if (!*lenp || (*ppos && !write)) {
3416 *lenp = 0;
3417 return 0;
3418 }
3419
3420 mutex_lock(&cdrom_mutex);
3421
3422 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3423
3424 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3425 goto done;
3426 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3427 goto done;
3428 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3429 goto done;
3430 if (cdrom_print_info("\nCan close tray:\t",
3431 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3432 goto done;
3433 if (cdrom_print_info("\nCan open tray:\t",
3434 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3435 goto done;
3436 if (cdrom_print_info("\nCan lock tray:\t",
3437 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3438 goto done;
3439 if (cdrom_print_info("\nCan change speed:",
3440 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3441 goto done;
3442 if (cdrom_print_info("\nCan select disk:",
3443 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3444 goto done;
3445 if (cdrom_print_info("\nCan read multisession:",
3446 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3447 goto done;
3448 if (cdrom_print_info("\nCan read MCN:\t",
3449 CDC_MCN, info, &pos, CTL_CAPABILITY))
3450 goto done;
3451 if (cdrom_print_info("\nReports media changed:",
3452 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3453 goto done;
3454 if (cdrom_print_info("\nCan play audio:\t",
3455 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3456 goto done;
3457 if (cdrom_print_info("\nCan write CD-R:\t",
3458 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3459 goto done;
3460 if (cdrom_print_info("\nCan write CD-RW:",
3461 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3462 goto done;
3463 if (cdrom_print_info("\nCan read DVD:\t",
3464 CDC_DVD, info, &pos, CTL_CAPABILITY))
3465 goto done;
3466 if (cdrom_print_info("\nCan write DVD-R:",
3467 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3468 goto done;
3469 if (cdrom_print_info("\nCan write DVD-RAM:",
3470 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3471 goto done;
3472 if (cdrom_print_info("\nCan read MRW:\t",
3473 CDC_MRW, info, &pos, CTL_CAPABILITY))
3474 goto done;
3475 if (cdrom_print_info("\nCan write MRW:\t",
3476 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3477 goto done;
3478 if (cdrom_print_info("\nCan write RAM:\t",
3479 CDC_RAM, info, &pos, CTL_CAPABILITY))
3480 goto done;
3481 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3482 goto done;
3483 doit:
3484 mutex_unlock(&cdrom_mutex);
3485 return proc_dostring(ctl, write, buffer, lenp, ppos);
3486 done:
3487 printk(KERN_INFO "cdrom: info buffer too small\n");
3488 goto doit;
3489 }
3490
3491 /* Unfortunately, per device settings are not implemented through
3492 procfs/sysctl yet. When they are, this will naturally disappear. For now
3493 just update all drives. Later this will become the template on which
3494 new registered drives will be based. */
3495 static void cdrom_update_settings(void)
3496 {
3497 struct cdrom_device_info *cdi;
3498
3499 mutex_lock(&cdrom_mutex);
3500 list_for_each_entry(cdi, &cdrom_list, list) {
3501 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3502 cdi->options |= CDO_AUTO_CLOSE;
3503 else if (!autoclose)
3504 cdi->options &= ~CDO_AUTO_CLOSE;
3505 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3506 cdi->options |= CDO_AUTO_EJECT;
3507 else if (!autoeject)
3508 cdi->options &= ~CDO_AUTO_EJECT;
3509 if (lockdoor && CDROM_CAN(CDC_LOCK))
3510 cdi->options |= CDO_LOCK;
3511 else if (!lockdoor)
3512 cdi->options &= ~CDO_LOCK;
3513 if (check_media_type)
3514 cdi->options |= CDO_CHECK_TYPE;
3515 else
3516 cdi->options &= ~CDO_CHECK_TYPE;
3517 }
3518 mutex_unlock(&cdrom_mutex);
3519 }
3520
3521 static int cdrom_sysctl_handler(ctl_table *ctl, int write,
3522 void __user *buffer, size_t *lenp, loff_t *ppos)
3523 {
3524 int ret;
3525
3526 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3527
3528 if (write) {
3529
3530 /* we only care for 1 or 0. */
3531 autoclose = !!cdrom_sysctl_settings.autoclose;
3532 autoeject = !!cdrom_sysctl_settings.autoeject;
3533 debug = !!cdrom_sysctl_settings.debug;
3534 lockdoor = !!cdrom_sysctl_settings.lock;
3535 check_media_type = !!cdrom_sysctl_settings.check;
3536
3537 /* update the option flags according to the changes. we
3538 don't have per device options through sysctl yet,
3539 but we will have and then this will disappear. */
3540 cdrom_update_settings();
3541 }
3542
3543 return ret;
3544 }
3545
3546 /* Place files in /proc/sys/dev/cdrom */
3547 static ctl_table cdrom_table[] = {
3548 {
3549 .procname = "info",
3550 .data = &cdrom_sysctl_settings.info,
3551 .maxlen = CDROM_STR_SIZE,
3552 .mode = 0444,
3553 .proc_handler = &cdrom_sysctl_info,
3554 },
3555 {
3556 .procname = "autoclose",
3557 .data = &cdrom_sysctl_settings.autoclose,
3558 .maxlen = sizeof(int),
3559 .mode = 0644,
3560 .proc_handler = &cdrom_sysctl_handler,
3561 },
3562 {
3563 .procname = "autoeject",
3564 .data = &cdrom_sysctl_settings.autoeject,
3565 .maxlen = sizeof(int),
3566 .mode = 0644,
3567 .proc_handler = &cdrom_sysctl_handler,
3568 },
3569 {
3570 .procname = "debug",
3571 .data = &cdrom_sysctl_settings.debug,
3572 .maxlen = sizeof(int),
3573 .mode = 0644,
3574 .proc_handler = &cdrom_sysctl_handler,
3575 },
3576 {
3577 .procname = "lock",
3578 .data = &cdrom_sysctl_settings.lock,
3579 .maxlen = sizeof(int),
3580 .mode = 0644,
3581 .proc_handler = &cdrom_sysctl_handler,
3582 },
3583 {
3584 .procname = "check_media",
3585 .data = &cdrom_sysctl_settings.check,
3586 .maxlen = sizeof(int),
3587 .mode = 0644,
3588 .proc_handler = &cdrom_sysctl_handler
3589 },
3590 { .ctl_name = 0 }
3591 };
3592
3593 static ctl_table cdrom_cdrom_table[] = {
3594 {
3595 .ctl_name = DEV_CDROM,
3596 .procname = "cdrom",
3597 .maxlen = 0,
3598 .mode = 0555,
3599 .child = cdrom_table,
3600 },
3601 { .ctl_name = 0 }
3602 };
3603
3604 /* Make sure that /proc/sys/dev is there */
3605 static ctl_table cdrom_root_table[] = {
3606 {
3607 .ctl_name = CTL_DEV,
3608 .procname = "dev",
3609 .maxlen = 0,
3610 .mode = 0555,
3611 .child = cdrom_cdrom_table,
3612 },
3613 { .ctl_name = 0 }
3614 };
3615 static struct ctl_table_header *cdrom_sysctl_header;
3616
3617 static void cdrom_sysctl_register(void)
3618 {
3619 static int initialized;
3620
3621 if (initialized == 1)
3622 return;
3623
3624 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3625
3626 /* set the defaults */
3627 cdrom_sysctl_settings.autoclose = autoclose;
3628 cdrom_sysctl_settings.autoeject = autoeject;
3629 cdrom_sysctl_settings.debug = debug;
3630 cdrom_sysctl_settings.lock = lockdoor;
3631 cdrom_sysctl_settings.check = check_media_type;
3632
3633 initialized = 1;
3634 }
3635
3636 static void cdrom_sysctl_unregister(void)
3637 {
3638 if (cdrom_sysctl_header)
3639 unregister_sysctl_table(cdrom_sysctl_header);
3640 }
3641
3642 #else /* CONFIG_SYSCTL */
3643
3644 static void cdrom_sysctl_register(void)
3645 {
3646 }
3647
3648 static void cdrom_sysctl_unregister(void)
3649 {
3650 }
3651
3652 #endif /* CONFIG_SYSCTL */
3653
3654 static int __init cdrom_init(void)
3655 {
3656 cdrom_sysctl_register();
3657
3658 return 0;
3659 }
3660
3661 static void __exit cdrom_exit(void)
3662 {
3663 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3664 cdrom_sysctl_unregister();
3665 }
3666
3667 module_init(cdrom_init);
3668 module_exit(cdrom_exit);
3669 MODULE_LICENSE("GPL");
Linux ARM platform port for MOXA ART SoC