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[ARM] pxa: rename cpu-pxa.c to cpufreq-pxa2xx.c
[linux-2.6-xlnx.git] / drivers / cdrom / cdrom.c
blob74031de517e6f342e070f7c8d5e057f7e10c78aa
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 inode *ip, struct file *fp)
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 ((fp->f_flags & O_NONBLOCK) && (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 (fp->f_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(ip->i_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 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
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 !(fp && fp->f_flags & O_NONBLOCK);
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 return 0;
1223 }
1224
1225 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1226 struct cdrom_changer_info *buf)
1227 {
1228 struct packet_command cgc;
1229 struct cdrom_device_ops *cdo = cdi->ops;
1230 int length;
1231
1232 /*
1233 * Sanyo changer isn't spec compliant (doesn't use regular change
1234 * LOAD_UNLOAD command, and it doesn't implement the mech status
1235 * command below
1236 */
1237 if (cdi->sanyo_slot) {
1238 buf->hdr.nslots = 3;
1239 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1240 for (length = 0; length < 3; length++) {
1241 buf->slots[length].disc_present = 1;
1242 buf->slots[length].change = 0;
1243 }
1244 return 0;
1245 }
1246
1247 length = sizeof(struct cdrom_mechstat_header) +
1248 cdi->capacity * sizeof(struct cdrom_slot);
1249
1250 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1251 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1252 cgc.cmd[8] = (length >> 8) & 0xff;
1253 cgc.cmd[9] = length & 0xff;
1254 return cdo->generic_packet(cdi, &cgc);
1255 }
1256
1257 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1258 {
1259 struct cdrom_changer_info *info;
1260 int ret;
1261
1262 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1263 if (cdi->sanyo_slot)
1264 return CDS_NO_INFO;
1265
1266 info = kmalloc(sizeof(*info), GFP_KERNEL);
1267 if (!info)
1268 return -ENOMEM;
1269
1270 if ((ret = cdrom_read_mech_status(cdi, info)))
1271 goto out_free;
1272
1273 if (info->slots[slot].disc_present)
1274 ret = CDS_DISC_OK;
1275 else
1276 ret = CDS_NO_DISC;
1277
1278 out_free:
1279 kfree(info);
1280 return ret;
1281 }
1282
1283 /* Return the number of slots for an ATAPI/SCSI cdrom,
1284 * return 1 if not a changer.
1285 */
1286 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1287 {
1288 int status;
1289 int nslots = 1;
1290 struct cdrom_changer_info *info;
1291
1292 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1293 /* cdrom_read_mech_status requires a valid value for capacity: */
1294 cdi->capacity = 0;
1295
1296 info = kmalloc(sizeof(*info), GFP_KERNEL);
1297 if (!info)
1298 return -ENOMEM;
1299
1300 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1301 nslots = info->hdr.nslots;
1302
1303 kfree(info);
1304 return nslots;
1305 }
1306
1307
1308 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1309 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1310 {
1311 struct packet_command cgc;
1312
1313 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1314 if (cdi->sanyo_slot && slot < 0)
1315 return 0;
1316
1317 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1318 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1319 cgc.cmd[4] = 2 + (slot >= 0);
1320 cgc.cmd[8] = slot;
1321 cgc.timeout = 60 * HZ;
1322
1323 /* The Sanyo 3 CD changer uses byte 7 of the
1324 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1325 using the GPCMD_LOAD_UNLOAD opcode. */
1326 if (cdi->sanyo_slot && -1 < slot) {
1327 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1328 cgc.cmd[7] = slot;
1329 cgc.cmd[4] = cgc.cmd[8] = 0;
1330 cdi->sanyo_slot = slot ? slot : 3;
1331 }
1332
1333 return cdi->ops->generic_packet(cdi, &cgc);
1334 }
1335
1336 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1337 {
1338 struct cdrom_changer_info *info;
1339 int curslot;
1340 int ret;
1341
1342 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1343 if (!CDROM_CAN(CDC_SELECT_DISC))
1344 return -EDRIVE_CANT_DO_THIS;
1345
1346 (void) cdi->ops->media_changed(cdi, slot);
1347
1348 if (slot == CDSL_NONE) {
1349 /* set media changed bits, on both queues */
1350 cdi->mc_flags = 0x3;
1351 return cdrom_load_unload(cdi, -1);
1352 }
1353
1354 info = kmalloc(sizeof(*info), GFP_KERNEL);
1355 if (!info)
1356 return -ENOMEM;
1357
1358 if ((ret = cdrom_read_mech_status(cdi, info))) {
1359 kfree(info);
1360 return ret;
1361 }
1362
1363 curslot = info->hdr.curslot;
1364 kfree(info);
1365
1366 if (cdi->use_count > 1 || keeplocked) {
1367 if (slot == CDSL_CURRENT) {
1368 return curslot;
1369 } else {
1370 return -EBUSY;
1371 }
1372 }
1373
1374 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1375 which is useful if it had been previously unloaded.
1376 Whether it can or not, it returns the current slot.
1377 Similarly, if slot happens to be the current one, we still
1378 try and load it. */
1379 if (slot == CDSL_CURRENT)
1380 slot = curslot;
1381
1382 /* set media changed bits on both queues */
1383 cdi->mc_flags = 0x3;
1384 if ((ret = cdrom_load_unload(cdi, slot)))
1385 return ret;
1386
1387 return slot;
1388 }
1389
1390 /* We want to make media_changed accessible to the user through an
1391 * ioctl. The main problem now is that we must double-buffer the
1392 * low-level implementation, to assure that the VFS and the user both
1393 * see a medium change once.
1394 */
1395
1396 static
1397 int media_changed(struct cdrom_device_info *cdi, int queue)
1398 {
1399 unsigned int mask = (1 << (queue & 1));
1400 int ret = !!(cdi->mc_flags & mask);
1401
1402 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1403 return ret;
1404 /* changed since last call? */
1405 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1406 cdi->mc_flags = 0x3; /* set bit on both queues */
1407 ret |= 1;
1408 cdi->media_written = 0;
1409 }
1410 cdi->mc_flags &= ~mask; /* clear bit */
1411 return ret;
1412 }
1413
1414 int cdrom_media_changed(struct cdrom_device_info *cdi)
1415 {
1416 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1417 * Returning "0" is always safe (media hasn't been changed). Do that
1418 * if the low-level cdrom driver dosn't support media changed. */
1419 if (cdi == NULL || cdi->ops->media_changed == NULL)
1420 return 0;
1421 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1422 return 0;
1423 return media_changed(cdi, 0);
1424 }
1425
1426 /* badly broken, I know. Is due for a fixup anytime. */
1427 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1428 {
1429 struct cdrom_tochdr header;
1430 struct cdrom_tocentry entry;
1431 int ret, i;
1432 tracks->data=0;
1433 tracks->audio=0;
1434 tracks->cdi=0;
1435 tracks->xa=0;
1436 tracks->error=0;
1437 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1438 /* Grab the TOC header so we can see how many tracks there are */
1439 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1440 if (ret == -ENOMEDIUM)
1441 tracks->error = CDS_NO_DISC;
1442 else
1443 tracks->error = CDS_NO_INFO;
1444 return;
1445 }
1446 /* check what type of tracks are on this disc */
1447 entry.cdte_format = CDROM_MSF;
1448 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1449 entry.cdte_track = i;
1450 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1451 tracks->error=CDS_NO_INFO;
1452 return;
1453 }
1454 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1455 if (entry.cdte_format == 0x10)
1456 tracks->cdi++;
1457 else if (entry.cdte_format == 0x20)
1458 tracks->xa++;
1459 else
1460 tracks->data++;
1461 } else
1462 tracks->audio++;
1463 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1464 i, entry.cdte_format, entry.cdte_ctrl);
1465 }
1466 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1467 header.cdth_trk1, tracks->audio, tracks->data,
1468 tracks->cdi, tracks->xa);
1469 }
1470
1471 /* Requests to the low-level drivers will /always/ be done in the
1472 following format convention:
1473
1474 CDROM_LBA: all data-related requests.
1475 CDROM_MSF: all audio-related requests.
1476
1477 However, a low-level implementation is allowed to refuse this
1478 request, and return information in its own favorite format.
1479
1480 It doesn't make sense /at all/ to ask for a play_audio in LBA
1481 format, or ask for multi-session info in MSF format. However, for
1482 backward compatibility these format requests will be satisfied, but
1483 the requests to the low-level drivers will be sanitized in the more
1484 meaningful format indicated above.
1485 */
1486
1487 static
1488 void sanitize_format(union cdrom_addr *addr,
1489 u_char * curr, u_char requested)
1490 {
1491 if (*curr == requested)
1492 return; /* nothing to be done! */
1493 if (requested == CDROM_LBA) {
1494 addr->lba = (int) addr->msf.frame +
1495 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1496 } else { /* CDROM_MSF */
1497 int lba = addr->lba;
1498 addr->msf.frame = lba % 75;
1499 lba /= 75;
1500 lba += 2;
1501 addr->msf.second = lba % 60;
1502 addr->msf.minute = lba / 60;
1503 }
1504 *curr = requested;
1505 }
1506
1507 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1508 int type)
1509 {
1510 memset(cgc, 0, sizeof(struct packet_command));
1511 if (buf)
1512 memset(buf, 0, len);
1513 cgc->buffer = (char *) buf;
1514 cgc->buflen = len;
1515 cgc->data_direction = type;
1516 cgc->timeout = CDROM_DEF_TIMEOUT;
1517 }
1518
1519 /* DVD handling */
1520
1521 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1522 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1523
1524 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1525 {
1526 cgc->cmd[0] = GPCMD_REPORT_KEY;
1527 cgc->cmd[10] = type | (agid << 6);
1528 switch (type) {
1529 case 0: case 8: case 5: {
1530 cgc->buflen = 8;
1531 break;
1532 }
1533 case 1: {
1534 cgc->buflen = 16;
1535 break;
1536 }
1537 case 2: case 4: {
1538 cgc->buflen = 12;
1539 break;
1540 }
1541 }
1542 cgc->cmd[9] = cgc->buflen;
1543 cgc->data_direction = CGC_DATA_READ;
1544 }
1545
1546 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1547 {
1548 cgc->cmd[0] = GPCMD_SEND_KEY;
1549 cgc->cmd[10] = type | (agid << 6);
1550 switch (type) {
1551 case 1: {
1552 cgc->buflen = 16;
1553 break;
1554 }
1555 case 3: {
1556 cgc->buflen = 12;
1557 break;
1558 }
1559 case 6: {
1560 cgc->buflen = 8;
1561 break;
1562 }
1563 }
1564 cgc->cmd[9] = cgc->buflen;
1565 cgc->data_direction = CGC_DATA_WRITE;
1566 }
1567
1568 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1569 {
1570 int ret;
1571 u_char buf[20];
1572 struct packet_command cgc;
1573 struct cdrom_device_ops *cdo = cdi->ops;
1574 rpc_state_t rpc_state;
1575
1576 memset(buf, 0, sizeof(buf));
1577 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1578
1579 switch (ai->type) {
1580 /* LU data send */
1581 case DVD_LU_SEND_AGID:
1582 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1583 cgc.quiet = 1;
1584 setup_report_key(&cgc, ai->lsa.agid, 0);
1585
1586 if ((ret = cdo->generic_packet(cdi, &cgc)))
1587 return ret;
1588
1589 ai->lsa.agid = buf[7] >> 6;
1590 /* Returning data, let host change state */
1591 break;
1592
1593 case DVD_LU_SEND_KEY1:
1594 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1595 setup_report_key(&cgc, ai->lsk.agid, 2);
1596
1597 if ((ret = cdo->generic_packet(cdi, &cgc)))
1598 return ret;
1599
1600 copy_key(ai->lsk.key, &buf[4]);
1601 /* Returning data, let host change state */
1602 break;
1603
1604 case DVD_LU_SEND_CHALLENGE:
1605 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1606 setup_report_key(&cgc, ai->lsc.agid, 1);
1607
1608 if ((ret = cdo->generic_packet(cdi, &cgc)))
1609 return ret;
1610
1611 copy_chal(ai->lsc.chal, &buf[4]);
1612 /* Returning data, let host change state */
1613 break;
1614
1615 /* Post-auth key */
1616 case DVD_LU_SEND_TITLE_KEY:
1617 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1618 cgc.quiet = 1;
1619 setup_report_key(&cgc, ai->lstk.agid, 4);
1620 cgc.cmd[5] = ai->lstk.lba;
1621 cgc.cmd[4] = ai->lstk.lba >> 8;
1622 cgc.cmd[3] = ai->lstk.lba >> 16;
1623 cgc.cmd[2] = ai->lstk.lba >> 24;
1624
1625 if ((ret = cdo->generic_packet(cdi, &cgc)))
1626 return ret;
1627
1628 ai->lstk.cpm = (buf[4] >> 7) & 1;
1629 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1630 ai->lstk.cgms = (buf[4] >> 4) & 3;
1631 copy_key(ai->lstk.title_key, &buf[5]);
1632 /* Returning data, let host change state */
1633 break;
1634
1635 case DVD_LU_SEND_ASF:
1636 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1637 setup_report_key(&cgc, ai->lsasf.agid, 5);
1638
1639 if ((ret = cdo->generic_packet(cdi, &cgc)))
1640 return ret;
1641
1642 ai->lsasf.asf = buf[7] & 1;
1643 break;
1644
1645 /* LU data receive (LU changes state) */
1646 case DVD_HOST_SEND_CHALLENGE:
1647 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1648 setup_send_key(&cgc, ai->hsc.agid, 1);
1649 buf[1] = 0xe;
1650 copy_chal(&buf[4], ai->hsc.chal);
1651
1652 if ((ret = cdo->generic_packet(cdi, &cgc)))
1653 return ret;
1654
1655 ai->type = DVD_LU_SEND_KEY1;
1656 break;
1657
1658 case DVD_HOST_SEND_KEY2:
1659 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1660 setup_send_key(&cgc, ai->hsk.agid, 3);
1661 buf[1] = 0xa;
1662 copy_key(&buf[4], ai->hsk.key);
1663
1664 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1665 ai->type = DVD_AUTH_FAILURE;
1666 return ret;
1667 }
1668 ai->type = DVD_AUTH_ESTABLISHED;
1669 break;
1670
1671 /* Misc */
1672 case DVD_INVALIDATE_AGID:
1673 cgc.quiet = 1;
1674 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1675 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1676 if ((ret = cdo->generic_packet(cdi, &cgc)))
1677 return ret;
1678 break;
1679
1680 /* Get region settings */
1681 case DVD_LU_SEND_RPC_STATE:
1682 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1683 setup_report_key(&cgc, 0, 8);
1684 memset(&rpc_state, 0, sizeof(rpc_state_t));
1685 cgc.buffer = (char *) &rpc_state;
1686
1687 if ((ret = cdo->generic_packet(cdi, &cgc)))
1688 return ret;
1689
1690 ai->lrpcs.type = rpc_state.type_code;
1691 ai->lrpcs.vra = rpc_state.vra;
1692 ai->lrpcs.ucca = rpc_state.ucca;
1693 ai->lrpcs.region_mask = rpc_state.region_mask;
1694 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1695 break;
1696
1697 /* Set region settings */
1698 case DVD_HOST_SEND_RPC_STATE:
1699 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1700 setup_send_key(&cgc, 0, 6);
1701 buf[1] = 6;
1702 buf[4] = ai->hrpcs.pdrc;
1703
1704 if ((ret = cdo->generic_packet(cdi, &cgc)))
1705 return ret;
1706 break;
1707
1708 default:
1709 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1710 return -ENOTTY;
1711 }
1712
1713 return 0;
1714 }
1715
1716 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1717 {
1718 unsigned char buf[21], *base;
1719 struct dvd_layer *layer;
1720 struct packet_command cgc;
1721 struct cdrom_device_ops *cdo = cdi->ops;
1722 int ret, layer_num = s->physical.layer_num;
1723
1724 if (layer_num >= DVD_LAYERS)
1725 return -EINVAL;
1726
1727 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1728 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1729 cgc.cmd[6] = layer_num;
1730 cgc.cmd[7] = s->type;
1731 cgc.cmd[9] = cgc.buflen & 0xff;
1732
1733 /*
1734 * refrain from reporting errors on non-existing layers (mainly)
1735 */
1736 cgc.quiet = 1;
1737
1738 if ((ret = cdo->generic_packet(cdi, &cgc)))
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 {
1768 int ret;
1769 u_char buf[8];
1770 struct packet_command cgc;
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 if ((ret = cdo->generic_packet(cdi, &cgc)))
1781 return ret;
1782
1783 s->copyright.cpst = buf[4];
1784 s->copyright.rmi = buf[5];
1785
1786 return 0;
1787 }
1788
1789 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1790 {
1791 int ret, size;
1792 u_char *buf;
1793 struct packet_command cgc;
1794 struct cdrom_device_ops *cdo = cdi->ops;
1795
1796 size = sizeof(s->disckey.value) + 4;
1797
1798 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1799 return -ENOMEM;
1800
1801 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1802 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1803 cgc.cmd[7] = s->type;
1804 cgc.cmd[8] = size >> 8;
1805 cgc.cmd[9] = size & 0xff;
1806 cgc.cmd[10] = s->disckey.agid << 6;
1807
1808 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1809 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1810
1811 kfree(buf);
1812 return ret;
1813 }
1814
1815 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1816 {
1817 int ret;
1818 u_char buf[4 + 188];
1819 struct packet_command cgc;
1820 struct cdrom_device_ops *cdo = cdi->ops;
1821
1822 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1823 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1824 cgc.cmd[7] = s->type;
1825 cgc.cmd[9] = cgc.buflen & 0xff;
1826
1827 if ((ret = cdo->generic_packet(cdi, &cgc)))
1828 return ret;
1829
1830 s->bca.len = buf[0] << 8 | buf[1];
1831 if (s->bca.len < 12 || s->bca.len > 188) {
1832 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1833 return -EIO;
1834 }
1835 memcpy(s->bca.value, &buf[4], s->bca.len);
1836
1837 return 0;
1838 }
1839
1840 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1841 {
1842 int ret = 0, size;
1843 u_char *buf;
1844 struct packet_command cgc;
1845 struct cdrom_device_ops *cdo = cdi->ops;
1846
1847 size = sizeof(s->manufact.value) + 4;
1848
1849 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1850 return -ENOMEM;
1851
1852 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1853 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1854 cgc.cmd[7] = s->type;
1855 cgc.cmd[8] = size >> 8;
1856 cgc.cmd[9] = size & 0xff;
1857
1858 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1859 kfree(buf);
1860 return ret;
1861 }
1862
1863 s->manufact.len = buf[0] << 8 | buf[1];
1864 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1865 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1866 " (%d)\n", s->manufact.len);
1867 ret = -EIO;
1868 } else {
1869 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1870 }
1871
1872 kfree(buf);
1873 return ret;
1874 }
1875
1876 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1877 {
1878 switch (s->type) {
1879 case DVD_STRUCT_PHYSICAL:
1880 return dvd_read_physical(cdi, s);
1881
1882 case DVD_STRUCT_COPYRIGHT:
1883 return dvd_read_copyright(cdi, s);
1884
1885 case DVD_STRUCT_DISCKEY:
1886 return dvd_read_disckey(cdi, s);
1887
1888 case DVD_STRUCT_BCA:
1889 return dvd_read_bca(cdi, s);
1890
1891 case DVD_STRUCT_MANUFACT:
1892 return dvd_read_manufact(cdi, s);
1893
1894 default:
1895 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1896 s->type);
1897 return -EINVAL;
1898 }
1899 }
1900
1901 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1902 struct packet_command *cgc,
1903 int page_code, int page_control)
1904 {
1905 struct cdrom_device_ops *cdo = cdi->ops;
1906
1907 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1908
1909 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1910 cgc->cmd[2] = page_code | (page_control << 6);
1911 cgc->cmd[7] = cgc->buflen >> 8;
1912 cgc->cmd[8] = cgc->buflen & 0xff;
1913 cgc->data_direction = CGC_DATA_READ;
1914 return cdo->generic_packet(cdi, cgc);
1915 }
1916
1917 int cdrom_mode_select(struct cdrom_device_info *cdi,
1918 struct packet_command *cgc)
1919 {
1920 struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1923 memset(cgc->buffer, 0, 2);
1924 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1925 cgc->cmd[1] = 0x10; /* PF */
1926 cgc->cmd[7] = cgc->buflen >> 8;
1927 cgc->cmd[8] = cgc->buflen & 0xff;
1928 cgc->data_direction = CGC_DATA_WRITE;
1929 return cdo->generic_packet(cdi, cgc);
1930 }
1931
1932 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1933 struct cdrom_subchnl *subchnl, int mcn)
1934 {
1935 struct cdrom_device_ops *cdo = cdi->ops;
1936 struct packet_command cgc;
1937 char buffer[32];
1938 int ret;
1939
1940 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1941 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1942 cgc.cmd[1] = 2; /* MSF addressing */
1943 cgc.cmd[2] = 0x40; /* request subQ data */
1944 cgc.cmd[3] = mcn ? 2 : 1;
1945 cgc.cmd[8] = 16;
1946
1947 if ((ret = cdo->generic_packet(cdi, &cgc)))
1948 return ret;
1949
1950 subchnl->cdsc_audiostatus = cgc.buffer[1];
1951 subchnl->cdsc_format = CDROM_MSF;
1952 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1953 subchnl->cdsc_trk = cgc.buffer[6];
1954 subchnl->cdsc_ind = cgc.buffer[7];
1955
1956 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1957 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1958 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1959 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1960 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1961 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1962
1963 return 0;
1964 }
1965
1966 /*
1967 * Specific READ_10 interface
1968 */
1969 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1970 struct packet_command *cgc, int lba,
1971 int blocksize, int nblocks)
1972 {
1973 struct cdrom_device_ops *cdo = cdi->ops;
1974
1975 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1976 cgc->cmd[0] = GPCMD_READ_10;
1977 cgc->cmd[2] = (lba >> 24) & 0xff;
1978 cgc->cmd[3] = (lba >> 16) & 0xff;
1979 cgc->cmd[4] = (lba >> 8) & 0xff;
1980 cgc->cmd[5] = lba & 0xff;
1981 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1982 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1983 cgc->cmd[8] = nblocks & 0xff;
1984 cgc->buflen = blocksize * nblocks;
1985 return cdo->generic_packet(cdi, cgc);
1986 }
1987
1988 /* very generic interface for reading the various types of blocks */
1989 static int cdrom_read_block(struct cdrom_device_info *cdi,
1990 struct packet_command *cgc,
1991 int lba, int nblocks, int format, int blksize)
1992 {
1993 struct cdrom_device_ops *cdo = cdi->ops;
1994
1995 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1996 cgc->cmd[0] = GPCMD_READ_CD;
1997 /* expected sector size - cdda,mode1,etc. */
1998 cgc->cmd[1] = format << 2;
1999 /* starting address */
2000 cgc->cmd[2] = (lba >> 24) & 0xff;
2001 cgc->cmd[3] = (lba >> 16) & 0xff;
2002 cgc->cmd[4] = (lba >> 8) & 0xff;
2003 cgc->cmd[5] = lba & 0xff;
2004 /* number of blocks */
2005 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2006 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2007 cgc->cmd[8] = nblocks & 0xff;
2008 cgc->buflen = blksize * nblocks;
2009
2010 /* set the header info returned */
2011 switch (blksize) {
2012 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2013 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2014 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2015 default : cgc->cmd[9] = 0x10;
2016 }
2017
2018 return cdo->generic_packet(cdi, cgc);
2019 }
2020
2021 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2022 int lba, int nframes)
2023 {
2024 struct packet_command cgc;
2025 int ret = 0;
2026 int nr;
2027
2028 cdi->last_sense = 0;
2029
2030 memset(&cgc, 0, sizeof(cgc));
2031
2032 /*
2033 * start with will ra.nframes size, back down if alloc fails
2034 */
2035 nr = nframes;
2036 do {
2037 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2038 if (cgc.buffer)
2039 break;
2040
2041 nr >>= 1;
2042 } while (nr);
2043
2044 if (!nr)
2045 return -ENOMEM;
2046
2047 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2048 ret = -EFAULT;
2049 goto out;
2050 }
2051
2052 cgc.data_direction = CGC_DATA_READ;
2053 while (nframes > 0) {
2054 if (nr > nframes)
2055 nr = nframes;
2056
2057 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2058 if (ret)
2059 break;
2060 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2061 ret = -EFAULT;
2062 break;
2063 }
2064 ubuf += CD_FRAMESIZE_RAW * nr;
2065 nframes -= nr;
2066 lba += nr;
2067 }
2068 out:
2069 kfree(cgc.buffer);
2070 return ret;
2071 }
2072
2073 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2074 int lba, int nframes)
2075 {
2076 struct request_queue *q = cdi->disk->queue;
2077 struct request *rq;
2078 struct bio *bio;
2079 unsigned int len;
2080 int nr, ret = 0;
2081
2082 if (!q)
2083 return -ENXIO;
2084
2085 rq = blk_get_request(q, READ, GFP_KERNEL);
2086 if (!rq)
2087 return -ENOMEM;
2088
2089 cdi->last_sense = 0;
2090
2091 while (nframes) {
2092 nr = nframes;
2093 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2094 nr = 1;
2095 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2096 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2097
2098 len = nr * CD_FRAMESIZE_RAW;
2099
2100 ret = blk_rq_map_user(q, rq, ubuf, len);
2101 if (ret)
2102 break;
2103
2104 rq->cmd[0] = GPCMD_READ_CD;
2105 rq->cmd[1] = 1 << 2;
2106 rq->cmd[2] = (lba >> 24) & 0xff;
2107 rq->cmd[3] = (lba >> 16) & 0xff;
2108 rq->cmd[4] = (lba >> 8) & 0xff;
2109 rq->cmd[5] = lba & 0xff;
2110 rq->cmd[6] = (nr >> 16) & 0xff;
2111 rq->cmd[7] = (nr >> 8) & 0xff;
2112 rq->cmd[8] = nr & 0xff;
2113 rq->cmd[9] = 0xf8;
2114
2115 rq->cmd_len = 12;
2116 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2117 rq->timeout = 60 * HZ;
2118 bio = rq->bio;
2119
2120 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2121 struct request_sense *s = rq->sense;
2122 ret = -EIO;
2123 cdi->last_sense = s->sense_key;
2124 }
2125
2126 if (blk_rq_unmap_user(bio))
2127 ret = -EFAULT;
2128
2129 if (ret)
2130 break;
2131
2132 nframes -= nr;
2133 lba += nr;
2134 ubuf += len;
2135 }
2136
2137 blk_put_request(rq);
2138 return ret;
2139 }
2140
2141 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2142 int lba, int nframes)
2143 {
2144 int ret;
2145
2146 if (cdi->cdda_method == CDDA_OLD)
2147 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2148
2149 retry:
2150 /*
2151 * for anything else than success and io error, we need to retry
2152 */
2153 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2154 if (!ret || ret != -EIO)
2155 return ret;
2156
2157 /*
2158 * I've seen drives get sense 4/8/3 udma crc errors on multi
2159 * frame dma, so drop to single frame dma if we need to
2160 */
2161 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2162 printk("cdrom: dropping to single frame dma\n");
2163 cdi->cdda_method = CDDA_BPC_SINGLE;
2164 goto retry;
2165 }
2166
2167 /*
2168 * so we have an io error of some sort with multi frame dma. if the
2169 * condition wasn't a hardware error
2170 * problems, not for any error
2171 */
2172 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2173 return ret;
2174
2175 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2176 cdi->cdda_method = CDDA_OLD;
2177 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2178 }
2179
2180 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2181 void __user *argp)
2182 {
2183 struct cdrom_multisession ms_info;
2184 u8 requested_format;
2185 int ret;
2186
2187 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2188
2189 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2190 return -ENOSYS;
2191
2192 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2193 return -EFAULT;
2194
2195 requested_format = ms_info.addr_format;
2196 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2197 return -EINVAL;
2198 ms_info.addr_format = CDROM_LBA;
2199
2200 ret = cdi->ops->get_last_session(cdi, &ms_info);
2201 if (ret)
2202 return ret;
2203
2204 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2205
2206 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2207 return -EFAULT;
2208
2209 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2210 return 0;
2211 }
2212
2213 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2214 {
2215 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2216
2217 if (!CDROM_CAN(CDC_OPEN_TRAY))
2218 return -ENOSYS;
2219 if (cdi->use_count != 1 || keeplocked)
2220 return -EBUSY;
2221 if (CDROM_CAN(CDC_LOCK)) {
2222 int ret = cdi->ops->lock_door(cdi, 0);
2223 if (ret)
2224 return ret;
2225 }
2226
2227 return cdi->ops->tray_move(cdi, 1);
2228 }
2229
2230 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2231 {
2232 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2233
2234 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2235 return -ENOSYS;
2236 return cdi->ops->tray_move(cdi, 0);
2237 }
2238
2239 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2240 unsigned long arg)
2241 {
2242 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2243
2244 if (!CDROM_CAN(CDC_OPEN_TRAY))
2245 return -ENOSYS;
2246 if (keeplocked)
2247 return -EBUSY;
2248
2249 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2250 if (arg)
2251 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2252 return 0;
2253 }
2254
2255 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2256 unsigned long arg)
2257 {
2258 struct cdrom_changer_info *info;
2259 int ret;
2260
2261 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2262
2263 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2264 return -ENOSYS;
2265
2266 /* cannot select disc or select current disc */
2267 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2268 return media_changed(cdi, 1);
2269
2270 if ((unsigned int)arg >= cdi->capacity)
2271 return -EINVAL;
2272
2273 info = kmalloc(sizeof(*info), GFP_KERNEL);
2274 if (!info)
2275 return -ENOMEM;
2276
2277 ret = cdrom_read_mech_status(cdi, info);
2278 if (!ret)
2279 ret = info->slots[arg].change;
2280 kfree(info);
2281 return ret;
2282 }
2283
2284 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2285 unsigned long arg)
2286 {
2287 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2288
2289 /*
2290 * Options need to be in sync with capability.
2291 * Too late for that, so we have to check each one separately.
2292 */
2293 switch (arg) {
2294 case CDO_USE_FFLAGS:
2295 case CDO_CHECK_TYPE:
2296 break;
2297 case CDO_LOCK:
2298 if (!CDROM_CAN(CDC_LOCK))
2299 return -ENOSYS;
2300 break;
2301 case 0:
2302 return cdi->options;
2303 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2304 default:
2305 if (!CDROM_CAN(arg))
2306 return -ENOSYS;
2307 }
2308 cdi->options |= (int) arg;
2309 return cdi->options;
2310 }
2311
2312 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2313 unsigned long arg)
2314 {
2315 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2316
2317 cdi->options &= ~(int) arg;
2318 return cdi->options;
2319 }
2320
2321 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2322 unsigned long arg)
2323 {
2324 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2325
2326 if (!CDROM_CAN(CDC_SELECT_SPEED))
2327 return -ENOSYS;
2328 return cdi->ops->select_speed(cdi, arg);
2329 }
2330
2331 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2332 unsigned long arg)
2333 {
2334 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2335
2336 if (!CDROM_CAN(CDC_SELECT_DISC))
2337 return -ENOSYS;
2338
2339 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2340 if ((int)arg >= cdi->capacity)
2341 return -EINVAL;
2342 }
2343
2344 /*
2345 * ->select_disc is a hook to allow a driver-specific way of
2346 * seleting disc. However, since there is no equivalent hook for
2347 * cdrom_slot_status this may not actually be useful...
2348 */
2349 if (cdi->ops->select_disc)
2350 return cdi->ops->select_disc(cdi, arg);
2351
2352 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2353 return cdrom_select_disc(cdi, arg);
2354 }
2355
2356 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2357 struct block_device *bdev)
2358 {
2359 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2360
2361 if (!capable(CAP_SYS_ADMIN))
2362 return -EACCES;
2363 if (!CDROM_CAN(CDC_RESET))
2364 return -ENOSYS;
2365 invalidate_bdev(bdev);
2366 return cdi->ops->reset(cdi);
2367 }
2368
2369 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2370 unsigned long arg)
2371 {
2372 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2373
2374 if (!CDROM_CAN(CDC_LOCK))
2375 return -EDRIVE_CANT_DO_THIS;
2376
2377 keeplocked = arg ? 1 : 0;
2378
2379 /*
2380 * Don't unlock the door on multiple opens by default, but allow
2381 * root to do so.
2382 */
2383 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2384 return -EBUSY;
2385 return cdi->ops->lock_door(cdi, arg);
2386 }
2387
2388 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2389 unsigned long arg)
2390 {
2391 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2392
2393 if (!capable(CAP_SYS_ADMIN))
2394 return -EACCES;
2395 debug = arg ? 1 : 0;
2396 return debug;
2397 }
2398
2399 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2400 {
2401 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2402 return (cdi->ops->capability & ~cdi->mask);
2403 }
2404
2405 /*
2406 * The following function is implemented, although very few audio
2407 * discs give Universal Product Code information, which should just be
2408 * the Medium Catalog Number on the box. Note, that the way the code
2409 * is written on the CD is /not/ uniform across all discs!
2410 */
2411 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2412 void __user *argp)
2413 {
2414 struct cdrom_mcn mcn;
2415 int ret;
2416
2417 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2418
2419 if (!(cdi->ops->capability & CDC_MCN))
2420 return -ENOSYS;
2421 ret = cdi->ops->get_mcn(cdi, &mcn);
2422 if (ret)
2423 return ret;
2424
2425 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2426 return -EFAULT;
2427 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2428 return 0;
2429 }
2430
2431 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2432 unsigned long arg)
2433 {
2434 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2435
2436 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2437 return -ENOSYS;
2438 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2439 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2440 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2441 if (((int)arg >= cdi->capacity))
2442 return -EINVAL;
2443 return cdrom_slot_status(cdi, arg);
2444 }
2445
2446 /*
2447 * Ok, this is where problems start. The current interface for the
2448 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2449 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2450 * is often the case, it is also very common for CDs to have some tracks
2451 * with data, and some tracks with audio. Just because I feel like it,
2452 * I declare the following to be the best way to cope. If the CD has ANY
2453 * data tracks on it, it will be returned as a data CD. If it has any XA
2454 * tracks, I will return it as that. Now I could simplify this interface
2455 * by combining these returns with the above, but this more clearly
2456 * demonstrates the problem with the current interface. Too bad this
2457 * wasn't designed to use bitmasks... -Erik
2458 *
2459 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2460 * User level programmers might feel the ioctl is not very useful.
2461 * ---david
2462 */
2463 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2464 {
2465 tracktype tracks;
2466
2467 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2468
2469 cdrom_count_tracks(cdi, &tracks);
2470 if (tracks.error)
2471 return tracks.error;
2472
2473 /* Policy mode on */
2474 if (tracks.audio > 0) {
2475 if (!tracks.data && !tracks.cdi && !tracks.xa)
2476 return CDS_AUDIO;
2477 else
2478 return CDS_MIXED;
2479 }
2480
2481 if (tracks.cdi > 0)
2482 return CDS_XA_2_2;
2483 if (tracks.xa > 0)
2484 return CDS_XA_2_1;
2485 if (tracks.data > 0)
2486 return CDS_DATA_1;
2487 /* Policy mode off */
2488
2489 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2490 return CDS_NO_INFO;
2491 }
2492
2493 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2494 {
2495 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2496 return cdi->capacity;
2497 }
2498
2499 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2500 void __user *argp)
2501 {
2502 struct cdrom_subchnl q;
2503 u8 requested, back;
2504 int ret;
2505
2506 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2507
2508 if (copy_from_user(&q, argp, sizeof(q)))
2509 return -EFAULT;
2510
2511 requested = q.cdsc_format;
2512 if (requested != CDROM_MSF && requested != CDROM_LBA)
2513 return -EINVAL;
2514 q.cdsc_format = CDROM_MSF;
2515
2516 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2517 if (ret)
2518 return ret;
2519
2520 back = q.cdsc_format; /* local copy */
2521 sanitize_format(&q.cdsc_absaddr, &back, requested);
2522 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2523
2524 if (copy_to_user(argp, &q, sizeof(q)))
2525 return -EFAULT;
2526 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2527 return 0;
2528 }
2529
2530 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2531 void __user *argp)
2532 {
2533 struct cdrom_tochdr header;
2534 int ret;
2535
2536 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2537
2538 if (copy_from_user(&header, argp, sizeof(header)))
2539 return -EFAULT;
2540
2541 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2542 if (ret)
2543 return ret;
2544
2545 if (copy_to_user(argp, &header, sizeof(header)))
2546 return -EFAULT;
2547 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2548 return 0;
2549 }
2550
2551 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2552 void __user *argp)
2553 {
2554 struct cdrom_tocentry entry;
2555 u8 requested_format;
2556 int ret;
2557
2558 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2559
2560 if (copy_from_user(&entry, argp, sizeof(entry)))
2561 return -EFAULT;
2562
2563 requested_format = entry.cdte_format;
2564 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2565 return -EINVAL;
2566 /* make interface to low-level uniform */
2567 entry.cdte_format = CDROM_MSF;
2568 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2569 if (ret)
2570 return ret;
2571 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2572
2573 if (copy_to_user(argp, &entry, sizeof(entry)))
2574 return -EFAULT;
2575 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2576 return 0;
2577 }
2578
2579 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2580 void __user *argp)
2581 {
2582 struct cdrom_msf msf;
2583
2584 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2585
2586 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2587 return -ENOSYS;
2588 if (copy_from_user(&msf, argp, sizeof(msf)))
2589 return -EFAULT;
2590 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2591 }
2592
2593 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2594 void __user *argp)
2595 {
2596 struct cdrom_ti ti;
2597 int ret;
2598
2599 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2600
2601 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2602 return -ENOSYS;
2603 if (copy_from_user(&ti, argp, sizeof(ti)))
2604 return -EFAULT;
2605
2606 ret = check_for_audio_disc(cdi, cdi->ops);
2607 if (ret)
2608 return ret;
2609 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2610 }
2611 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2612 void __user *argp)
2613 {
2614 struct cdrom_volctrl volume;
2615
2616 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2617
2618 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2619 return -ENOSYS;
2620 if (copy_from_user(&volume, argp, sizeof(volume)))
2621 return -EFAULT;
2622 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2623 }
2624
2625 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2626 void __user *argp)
2627 {
2628 struct cdrom_volctrl volume;
2629 int ret;
2630
2631 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2632
2633 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2634 return -ENOSYS;
2635
2636 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2637 if (ret)
2638 return ret;
2639
2640 if (copy_to_user(argp, &volume, sizeof(volume)))
2641 return -EFAULT;
2642 return 0;
2643 }
2644
2645 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2646 unsigned int cmd)
2647 {
2648 int ret;
2649
2650 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2651
2652 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2653 return -ENOSYS;
2654 ret = check_for_audio_disc(cdi, cdi->ops);
2655 if (ret)
2656 return ret;
2657 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2658 }
2659
2660 /*
2661 * Just about every imaginable ioctl is supported in the Uniform layer
2662 * these days.
2663 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2664 */
2665 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2666 struct inode *ip, unsigned int cmd, unsigned long arg)
2667 {
2668 void __user *argp = (void __user *)arg;
2669 int ret;
2670 struct gendisk *disk = ip->i_bdev->bd_disk;
2671
2672 /*
2673 * Try the generic SCSI command ioctl's first.
2674 */
2675 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp);
2676 if (ret != -ENOTTY)
2677 return ret;
2678
2679 switch (cmd) {
2680 case CDROMMULTISESSION:
2681 return cdrom_ioctl_multisession(cdi, argp);
2682 case CDROMEJECT:
2683 return cdrom_ioctl_eject(cdi);
2684 case CDROMCLOSETRAY:
2685 return cdrom_ioctl_closetray(cdi);
2686 case CDROMEJECT_SW:
2687 return cdrom_ioctl_eject_sw(cdi, arg);
2688 case CDROM_MEDIA_CHANGED:
2689 return cdrom_ioctl_media_changed(cdi, arg);
2690 case CDROM_SET_OPTIONS:
2691 return cdrom_ioctl_set_options(cdi, arg);
2692 case CDROM_CLEAR_OPTIONS:
2693 return cdrom_ioctl_clear_options(cdi, arg);
2694 case CDROM_SELECT_SPEED:
2695 return cdrom_ioctl_select_speed(cdi, arg);
2696 case CDROM_SELECT_DISC:
2697 return cdrom_ioctl_select_disc(cdi, arg);
2698 case CDROMRESET:
2699 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2700 case CDROM_LOCKDOOR:
2701 return cdrom_ioctl_lock_door(cdi, arg);
2702 case CDROM_DEBUG:
2703 return cdrom_ioctl_debug(cdi, arg);
2704 case CDROM_GET_CAPABILITY:
2705 return cdrom_ioctl_get_capability(cdi);
2706 case CDROM_GET_MCN:
2707 return cdrom_ioctl_get_mcn(cdi, argp);
2708 case CDROM_DRIVE_STATUS:
2709 return cdrom_ioctl_drive_status(cdi, arg);
2710 case CDROM_DISC_STATUS:
2711 return cdrom_ioctl_disc_status(cdi);
2712 case CDROM_CHANGER_NSLOTS:
2713 return cdrom_ioctl_changer_nslots(cdi);
2714 }
2715
2716 /*
2717 * Use the ioctls that are implemented through the generic_packet()
2718 * interface. this may look at bit funny, but if -ENOTTY is
2719 * returned that particular ioctl is not implemented and we
2720 * let it go through the device specific ones.
2721 */
2722 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2723 ret = mmc_ioctl(cdi, cmd, arg);
2724 if (ret != -ENOTTY)
2725 return ret;
2726 }
2727
2728 /*
2729 * Note: most of the cdinfo() calls are commented out here,
2730 * because they fill up the sys log when CD players poll
2731 * the drive.
2732 */
2733 switch (cmd) {
2734 case CDROMSUBCHNL:
2735 return cdrom_ioctl_get_subchnl(cdi, argp);
2736 case CDROMREADTOCHDR:
2737 return cdrom_ioctl_read_tochdr(cdi, argp);
2738 case CDROMREADTOCENTRY:
2739 return cdrom_ioctl_read_tocentry(cdi, argp);
2740 case CDROMPLAYMSF:
2741 return cdrom_ioctl_play_msf(cdi, argp);
2742 case CDROMPLAYTRKIND:
2743 return cdrom_ioctl_play_trkind(cdi, argp);
2744 case CDROMVOLCTRL:
2745 return cdrom_ioctl_volctrl(cdi, argp);
2746 case CDROMVOLREAD:
2747 return cdrom_ioctl_volread(cdi, argp);
2748 case CDROMSTART:
2749 case CDROMSTOP:
2750 case CDROMPAUSE:
2751 case CDROMRESUME:
2752 return cdrom_ioctl_audioctl(cdi, cmd);
2753 }
2754
2755 return -ENOSYS;
2756 }
2757
2758 /*
2759 * Required when we need to use READ_10 to issue other than 2048 block
2760 * reads
2761 */
2762 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2763 {
2764 struct cdrom_device_ops *cdo = cdi->ops;
2765 struct packet_command cgc;
2766 struct modesel_head mh;
2767
2768 memset(&mh, 0, sizeof(mh));
2769 mh.block_desc_length = 0x08;
2770 mh.block_length_med = (size >> 8) & 0xff;
2771 mh.block_length_lo = size & 0xff;
2772
2773 memset(&cgc, 0, sizeof(cgc));
2774 cgc.cmd[0] = 0x15;
2775 cgc.cmd[1] = 1 << 4;
2776 cgc.cmd[4] = 12;
2777 cgc.buflen = sizeof(mh);
2778 cgc.buffer = (char *) &mh;
2779 cgc.data_direction = CGC_DATA_WRITE;
2780 mh.block_desc_length = 0x08;
2781 mh.block_length_med = (size >> 8) & 0xff;
2782 mh.block_length_lo = size & 0xff;
2783
2784 return cdo->generic_packet(cdi, &cgc);
2785 }
2786
2787 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2788 unsigned long arg)
2789 {
2790 struct cdrom_device_ops *cdo = cdi->ops;
2791 struct packet_command cgc;
2792 struct request_sense sense;
2793 unsigned char buffer[32];
2794 int ret = 0;
2795
2796 memset(&cgc, 0, sizeof(cgc));
2797
2798 /* build a unified command and queue it through
2799 cdo->generic_packet() */
2800 switch (cmd) {
2801 case CDROMREADRAW:
2802 case CDROMREADMODE1:
2803 case CDROMREADMODE2: {
2804 struct cdrom_msf msf;
2805 int blocksize = 0, format = 0, lba;
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 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
2825 if (cgc.buffer == NULL)
2826 return -ENOMEM;
2827 memset(&sense, 0, sizeof(sense));
2828 cgc.sense = &sense;
2829 cgc.data_direction = CGC_DATA_READ;
2830 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2831 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2832 /*
2833 * SCSI-II devices are not required to support
2834 * READ_CD, so let's try switching block size
2835 */
2836 /* FIXME: switch back again... */
2837 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2838 kfree(cgc.buffer);
2839 return ret;
2840 }
2841 cgc.sense = NULL;
2842 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2843 ret |= cdrom_switch_blocksize(cdi, blocksize);
2844 }
2845 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2846 ret = -EFAULT;
2847 kfree(cgc.buffer);
2848 return ret;
2849 }
2850 case CDROMREADAUDIO: {
2851 struct cdrom_read_audio ra;
2852 int lba;
2853
2854 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2855
2856 if (ra.addr_format == CDROM_MSF)
2857 lba = msf_to_lba(ra.addr.msf.minute,
2858 ra.addr.msf.second,
2859 ra.addr.msf.frame);
2860 else if (ra.addr_format == CDROM_LBA)
2861 lba = ra.addr.lba;
2862 else
2863 return -EINVAL;
2864
2865 /* FIXME: we need upper bound checking, too!! */
2866 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2867 return -EINVAL;
2868
2869 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2870 }
2871 case CDROMSUBCHNL: {
2872 struct cdrom_subchnl q;
2873 u_char requested, back;
2874 IOCTL_IN(arg, struct cdrom_subchnl, q);
2875 requested = q.cdsc_format;
2876 if (!((requested == CDROM_MSF) ||
2877 (requested == CDROM_LBA)))
2878 return -EINVAL;
2879 q.cdsc_format = CDROM_MSF;
2880 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2881 return ret;
2882 back = q.cdsc_format; /* local copy */
2883 sanitize_format(&q.cdsc_absaddr, &back, requested);
2884 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2885 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2886 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2887 return 0;
2888 }
2889 case CDROMPLAYMSF: {
2890 struct cdrom_msf msf;
2891 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2892 IOCTL_IN(arg, struct cdrom_msf, msf);
2893 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2894 cgc.cmd[3] = msf.cdmsf_min0;
2895 cgc.cmd[4] = msf.cdmsf_sec0;
2896 cgc.cmd[5] = msf.cdmsf_frame0;
2897 cgc.cmd[6] = msf.cdmsf_min1;
2898 cgc.cmd[7] = msf.cdmsf_sec1;
2899 cgc.cmd[8] = msf.cdmsf_frame1;
2900 cgc.data_direction = CGC_DATA_NONE;
2901 return cdo->generic_packet(cdi, &cgc);
2902 }
2903 case CDROMPLAYBLK: {
2904 struct cdrom_blk blk;
2905 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2906 IOCTL_IN(arg, struct cdrom_blk, blk);
2907 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2908 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2909 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2910 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2911 cgc.cmd[5] = blk.from & 0xff;
2912 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2913 cgc.cmd[8] = blk.len & 0xff;
2914 cgc.data_direction = CGC_DATA_NONE;
2915 return cdo->generic_packet(cdi, &cgc);
2916 }
2917 case CDROMVOLCTRL:
2918 case CDROMVOLREAD: {
2919 struct cdrom_volctrl volctrl;
2920 char mask[sizeof(buffer)];
2921 unsigned short offset;
2922
2923 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2924
2925 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2926
2927 cgc.buffer = buffer;
2928 cgc.buflen = 24;
2929 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2930 return ret;
2931
2932 /* originally the code depended on buffer[1] to determine
2933 how much data is available for transfer. buffer[1] is
2934 unfortunately ambigious and the only reliable way seem
2935 to be to simply skip over the block descriptor... */
2936 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
2937
2938 if (offset + 16 > sizeof(buffer))
2939 return -E2BIG;
2940
2941 if (offset + 16 > cgc.buflen) {
2942 cgc.buflen = offset+16;
2943 ret = cdrom_mode_sense(cdi, &cgc,
2944 GPMODE_AUDIO_CTL_PAGE, 0);
2945 if (ret)
2946 return ret;
2947 }
2948
2949 /* sanity check */
2950 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2951 buffer[offset+1] < 14)
2952 return -EINVAL;
2953
2954 /* now we have the current volume settings. if it was only
2955 a CDROMVOLREAD, return these values */
2956 if (cmd == CDROMVOLREAD) {
2957 volctrl.channel0 = buffer[offset+9];
2958 volctrl.channel1 = buffer[offset+11];
2959 volctrl.channel2 = buffer[offset+13];
2960 volctrl.channel3 = buffer[offset+15];
2961 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2962 return 0;
2963 }
2964
2965 /* get the volume mask */
2966 cgc.buffer = mask;
2967 if ((ret = cdrom_mode_sense(cdi, &cgc,
2968 GPMODE_AUDIO_CTL_PAGE, 1)))
2969 return ret;
2970
2971 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2972 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2973 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2974 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2975
2976 /* set volume */
2977 cgc.buffer = buffer + offset - 8;
2978 memset(cgc.buffer, 0, 8);
2979 return cdrom_mode_select(cdi, &cgc);
2980 }
2981
2982 case CDROMSTART:
2983 case CDROMSTOP: {
2984 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2985 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2986 cgc.cmd[1] = 1;
2987 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
2988 cgc.data_direction = CGC_DATA_NONE;
2989 return cdo->generic_packet(cdi, &cgc);
2990 }
2991
2992 case CDROMPAUSE:
2993 case CDROMRESUME: {
2994 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
2995 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
2996 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
2997 cgc.data_direction = CGC_DATA_NONE;
2998 return cdo->generic_packet(cdi, &cgc);
2999 }
3000
3001 case DVD_READ_STRUCT: {
3002 dvd_struct *s;
3003 int size = sizeof(dvd_struct);
3004 if (!CDROM_CAN(CDC_DVD))
3005 return -ENOSYS;
3006 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
3007 return -ENOMEM;
3008 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3009 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3010 kfree(s);
3011 return -EFAULT;
3012 }
3013 if ((ret = dvd_read_struct(cdi, s))) {
3014 kfree(s);
3015 return ret;
3016 }
3017 if (copy_to_user((dvd_struct __user *)arg, s, size))
3018 ret = -EFAULT;
3019 kfree(s);
3020 return ret;
3021 }
3022
3023 case DVD_AUTH: {
3024 dvd_authinfo ai;
3025 if (!CDROM_CAN(CDC_DVD))
3026 return -ENOSYS;
3027 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3028 IOCTL_IN(arg, dvd_authinfo, ai);
3029 if ((ret = dvd_do_auth (cdi, &ai)))
3030 return ret;
3031 IOCTL_OUT(arg, dvd_authinfo, ai);
3032 return 0;
3033 }
3034
3035 case CDROM_NEXT_WRITABLE: {
3036 long next = 0;
3037 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3038 if ((ret = cdrom_get_next_writable(cdi, &next)))
3039 return ret;
3040 IOCTL_OUT(arg, long, next);
3041 return 0;
3042 }
3043 case CDROM_LAST_WRITTEN: {
3044 long last = 0;
3045 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3046 if ((ret = cdrom_get_last_written(cdi, &last)))
3047 return ret;
3048 IOCTL_OUT(arg, long, last);
3049 return 0;
3050 }
3051 } /* switch */
3052
3053 return -ENOTTY;
3054 }
3055
3056 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3057 track_information *ti)
3058 {
3059 struct cdrom_device_ops *cdo = cdi->ops;
3060 struct packet_command cgc;
3061 int ret, buflen;
3062
3063 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3064 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3065 cgc.cmd[1] = type & 3;
3066 cgc.cmd[4] = (track & 0xff00) >> 8;
3067 cgc.cmd[5] = track & 0xff;
3068 cgc.cmd[8] = 8;
3069 cgc.quiet = 1;
3070
3071 if ((ret = cdo->generic_packet(cdi, &cgc)))
3072 return ret;
3073
3074 buflen = be16_to_cpu(ti->track_information_length) +
3075 sizeof(ti->track_information_length);
3076
3077 if (buflen > sizeof(track_information))
3078 buflen = sizeof(track_information);
3079
3080 cgc.cmd[8] = cgc.buflen = buflen;
3081 if ((ret = cdo->generic_packet(cdi, &cgc)))
3082 return ret;
3083
3084 /* return actual fill size */
3085 return buflen;
3086 }
3087
3088 /* requires CD R/RW */
3089 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3090 {
3091 struct cdrom_device_ops *cdo = cdi->ops;
3092 struct packet_command cgc;
3093 int ret, buflen;
3094
3095 /* set up command and get the disc info */
3096 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3097 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3098 cgc.cmd[8] = cgc.buflen = 2;
3099 cgc.quiet = 1;
3100
3101 if ((ret = cdo->generic_packet(cdi, &cgc)))
3102 return ret;
3103
3104 /* not all drives have the same disc_info length, so requeue
3105 * packet with the length the drive tells us it can supply
3106 */
3107 buflen = be16_to_cpu(di->disc_information_length) +
3108 sizeof(di->disc_information_length);
3109
3110 if (buflen > sizeof(disc_information))
3111 buflen = sizeof(disc_information);
3112
3113 cgc.cmd[8] = cgc.buflen = buflen;
3114 if ((ret = cdo->generic_packet(cdi, &cgc)))
3115 return ret;
3116
3117 /* return actual fill size */
3118 return buflen;
3119 }
3120
3121 /* return the last written block on the CD-R media. this is for the udf
3122 file system. */
3123 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3124 {
3125 struct cdrom_tocentry toc;
3126 disc_information di;
3127 track_information ti;
3128 __u32 last_track;
3129 int ret = -1, ti_size;
3130
3131 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3132 goto use_toc;
3133
3134 ret = cdrom_get_disc_info(cdi, &di);
3135 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3136 + sizeof(di.last_track_lsb)))
3137 goto use_toc;
3138
3139 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3140 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3141 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3142 if (ti_size < (int)offsetof(typeof(ti), track_start))
3143 goto use_toc;
3144
3145 /* if this track is blank, try the previous. */
3146 if (ti.blank) {
3147 if (last_track==1)
3148 goto use_toc;
3149 last_track--;
3150 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3151 }
3152
3153 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3154 + sizeof(ti.track_size)))
3155 goto use_toc;
3156
3157 /* if last recorded field is valid, return it. */
3158 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3159 + sizeof(ti.last_rec_address))) {
3160 *last_written = be32_to_cpu(ti.last_rec_address);
3161 } else {
3162 /* make it up instead */
3163 *last_written = be32_to_cpu(ti.track_start) +
3164 be32_to_cpu(ti.track_size);
3165 if (ti.free_blocks)
3166 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3167 }
3168 return 0;
3169
3170 /* this is where we end up if the drive either can't do a
3171 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3172 it doesn't give enough information or fails. then we return
3173 the toc contents. */
3174 use_toc:
3175 toc.cdte_format = CDROM_MSF;
3176 toc.cdte_track = CDROM_LEADOUT;
3177 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3178 return ret;
3179 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3180 *last_written = toc.cdte_addr.lba;
3181 return 0;
3182 }
3183
3184 /* return the next writable block. also for udf file system. */
3185 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3186 {
3187 disc_information di;
3188 track_information ti;
3189 __u16 last_track;
3190 int ret, ti_size;
3191
3192 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3193 goto use_last_written;
3194
3195 ret = cdrom_get_disc_info(cdi, &di);
3196 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3197 + sizeof(di.last_track_lsb))
3198 goto use_last_written;
3199
3200 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3201 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3202 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3203 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3204 goto use_last_written;
3205
3206 /* if this track is blank, try the previous. */
3207 if (ti.blank) {
3208 if (last_track == 1)
3209 goto use_last_written;
3210 last_track--;
3211 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3212 if (ti_size < 0)
3213 goto use_last_written;
3214 }
3215
3216 /* if next recordable address field is valid, use it. */
3217 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3218 + sizeof(ti.next_writable)) {
3219 *next_writable = be32_to_cpu(ti.next_writable);
3220 return 0;
3221 }
3222
3223 use_last_written:
3224 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3225 *next_writable = 0;
3226 return ret;
3227 } else {
3228 *next_writable += 7;
3229 return 0;
3230 }
3231 }
3232
3233 EXPORT_SYMBOL(cdrom_get_last_written);
3234 EXPORT_SYMBOL(register_cdrom);
3235 EXPORT_SYMBOL(unregister_cdrom);
3236 EXPORT_SYMBOL(cdrom_open);
3237 EXPORT_SYMBOL(cdrom_release);
3238 EXPORT_SYMBOL(cdrom_ioctl);
3239 EXPORT_SYMBOL(cdrom_media_changed);
3240 EXPORT_SYMBOL(cdrom_number_of_slots);
3241 EXPORT_SYMBOL(cdrom_mode_select);
3242 EXPORT_SYMBOL(cdrom_mode_sense);
3243 EXPORT_SYMBOL(init_cdrom_command);
3244 EXPORT_SYMBOL(cdrom_get_media_event);
3245
3246 #ifdef CONFIG_SYSCTL
3247
3248 #define CDROM_STR_SIZE 1000
3249
3250 static struct cdrom_sysctl_settings {
3251 char info[CDROM_STR_SIZE]; /* general info */
3252 int autoclose; /* close tray upon mount, etc */
3253 int autoeject; /* eject on umount */
3254 int debug; /* turn on debugging messages */
3255 int lock; /* lock the door on device open */
3256 int check; /* check media type */
3257 } cdrom_sysctl_settings;
3258
3259 enum cdrom_print_option {
3260 CTL_NAME,
3261 CTL_SPEED,
3262 CTL_SLOTS,
3263 CTL_CAPABILITY
3264 };
3265
3266 static int cdrom_print_info(const char *header, int val, char *info,
3267 int *pos, enum cdrom_print_option option)
3268 {
3269 const int max_size = sizeof(cdrom_sysctl_settings.info);
3270 struct cdrom_device_info *cdi;
3271 int ret;
3272
3273 ret = scnprintf(info + *pos, max_size - *pos, header);
3274 if (!ret)
3275 return 1;
3276
3277 *pos += ret;
3278
3279 list_for_each_entry(cdi, &cdrom_list, list) {
3280 switch (option) {
3281 case CTL_NAME:
3282 ret = scnprintf(info + *pos, max_size - *pos,
3283 "\t%s", cdi->name);
3284 break;
3285 case CTL_SPEED:
3286 ret = scnprintf(info + *pos, max_size - *pos,
3287 "\t%d", cdi->speed);
3288 break;
3289 case CTL_SLOTS:
3290 ret = scnprintf(info + *pos, max_size - *pos,
3291 "\t%d", cdi->capacity);
3292 break;
3293 case CTL_CAPABILITY:
3294 ret = scnprintf(info + *pos, max_size - *pos,
3295 "\t%d", CDROM_CAN(val) != 0);
3296 break;
3297 default:
3298 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3299 return 1;
3300 }
3301 if (!ret)
3302 return 1;
3303 *pos += ret;
3304 }
3305
3306 return 0;
3307 }
3308
3309 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3310 void __user *buffer, size_t *lenp, loff_t *ppos)
3311 {
3312 int pos;
3313 char *info = cdrom_sysctl_settings.info;
3314 const int max_size = sizeof(cdrom_sysctl_settings.info);
3315
3316 if (!*lenp || (*ppos && !write)) {
3317 *lenp = 0;
3318 return 0;
3319 }
3320
3321 mutex_lock(&cdrom_mutex);
3322
3323 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3324
3325 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3326 goto done;
3327 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3328 goto done;
3329 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3330 goto done;
3331 if (cdrom_print_info("\nCan close tray:\t",
3332 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3333 goto done;
3334 if (cdrom_print_info("\nCan open tray:\t",
3335 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3336 goto done;
3337 if (cdrom_print_info("\nCan lock tray:\t",
3338 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3339 goto done;
3340 if (cdrom_print_info("\nCan change speed:",
3341 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3342 goto done;
3343 if (cdrom_print_info("\nCan select disk:",
3344 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3345 goto done;
3346 if (cdrom_print_info("\nCan read multisession:",
3347 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3348 goto done;
3349 if (cdrom_print_info("\nCan read MCN:\t",
3350 CDC_MCN, info, &pos, CTL_CAPABILITY))
3351 goto done;
3352 if (cdrom_print_info("\nReports media changed:",
3353 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3354 goto done;
3355 if (cdrom_print_info("\nCan play audio:\t",
3356 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3357 goto done;
3358 if (cdrom_print_info("\nCan write CD-R:\t",
3359 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3360 goto done;
3361 if (cdrom_print_info("\nCan write CD-RW:",
3362 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3363 goto done;
3364 if (cdrom_print_info("\nCan read DVD:\t",
3365 CDC_DVD, info, &pos, CTL_CAPABILITY))
3366 goto done;
3367 if (cdrom_print_info("\nCan write DVD-R:",
3368 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3369 goto done;
3370 if (cdrom_print_info("\nCan write DVD-RAM:",
3371 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3372 goto done;
3373 if (cdrom_print_info("\nCan read MRW:\t",
3374 CDC_MRW, info, &pos, CTL_CAPABILITY))
3375 goto done;
3376 if (cdrom_print_info("\nCan write MRW:\t",
3377 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3378 goto done;
3379 if (cdrom_print_info("\nCan write RAM:\t",
3380 CDC_RAM, info, &pos, CTL_CAPABILITY))
3381 goto done;
3382 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3383 goto done;
3384 doit:
3385 mutex_unlock(&cdrom_mutex);
3386 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3387 done:
3388 printk(KERN_INFO "cdrom: info buffer too small\n");
3389 goto doit;
3390 }
3391
3392 /* Unfortunately, per device settings are not implemented through
3393 procfs/sysctl yet. When they are, this will naturally disappear. For now
3394 just update all drives. Later this will become the template on which
3395 new registered drives will be based. */
3396 static void cdrom_update_settings(void)
3397 {
3398 struct cdrom_device_info *cdi;
3399
3400 mutex_lock(&cdrom_mutex);
3401 list_for_each_entry(cdi, &cdrom_list, list) {
3402 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3403 cdi->options |= CDO_AUTO_CLOSE;
3404 else if (!autoclose)
3405 cdi->options &= ~CDO_AUTO_CLOSE;
3406 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3407 cdi->options |= CDO_AUTO_EJECT;
3408 else if (!autoeject)
3409 cdi->options &= ~CDO_AUTO_EJECT;
3410 if (lockdoor && CDROM_CAN(CDC_LOCK))
3411 cdi->options |= CDO_LOCK;
3412 else if (!lockdoor)
3413 cdi->options &= ~CDO_LOCK;
3414 if (check_media_type)
3415 cdi->options |= CDO_CHECK_TYPE;
3416 else
3417 cdi->options &= ~CDO_CHECK_TYPE;
3418 }
3419 mutex_unlock(&cdrom_mutex);
3420 }
3421
3422 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3423 void __user *buffer, size_t *lenp, loff_t *ppos)
3424 {
3425 int ret;
3426
3427 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3428
3429 if (write) {
3430
3431 /* we only care for 1 or 0. */
3432 autoclose = !!cdrom_sysctl_settings.autoclose;
3433 autoeject = !!cdrom_sysctl_settings.autoeject;
3434 debug = !!cdrom_sysctl_settings.debug;
3435 lockdoor = !!cdrom_sysctl_settings.lock;
3436 check_media_type = !!cdrom_sysctl_settings.check;
3437
3438 /* update the option flags according to the changes. we
3439 don't have per device options through sysctl yet,
3440 but we will have and then this will disappear. */
3441 cdrom_update_settings();
3442 }
3443
3444 return ret;
3445 }
3446
3447 /* Place files in /proc/sys/dev/cdrom */
3448 static ctl_table cdrom_table[] = {
3449 {
3450 .procname = "info",
3451 .data = &cdrom_sysctl_settings.info,
3452 .maxlen = CDROM_STR_SIZE,
3453 .mode = 0444,
3454 .proc_handler = &cdrom_sysctl_info,
3455 },
3456 {
3457 .procname = "autoclose",
3458 .data = &cdrom_sysctl_settings.autoclose,
3459 .maxlen = sizeof(int),
3460 .mode = 0644,
3461 .proc_handler = &cdrom_sysctl_handler,
3462 },
3463 {
3464 .procname = "autoeject",
3465 .data = &cdrom_sysctl_settings.autoeject,
3466 .maxlen = sizeof(int),
3467 .mode = 0644,
3468 .proc_handler = &cdrom_sysctl_handler,
3469 },
3470 {
3471 .procname = "debug",
3472 .data = &cdrom_sysctl_settings.debug,
3473 .maxlen = sizeof(int),
3474 .mode = 0644,
3475 .proc_handler = &cdrom_sysctl_handler,
3476 },
3477 {
3478 .procname = "lock",
3479 .data = &cdrom_sysctl_settings.lock,
3480 .maxlen = sizeof(int),
3481 .mode = 0644,
3482 .proc_handler = &cdrom_sysctl_handler,
3483 },
3484 {
3485 .procname = "check_media",
3486 .data = &cdrom_sysctl_settings.check,
3487 .maxlen = sizeof(int),
3488 .mode = 0644,
3489 .proc_handler = &cdrom_sysctl_handler
3490 },
3491 { .ctl_name = 0 }
3492 };
3493
3494 static ctl_table cdrom_cdrom_table[] = {
3495 {
3496 .ctl_name = DEV_CDROM,
3497 .procname = "cdrom",
3498 .maxlen = 0,
3499 .mode = 0555,
3500 .child = cdrom_table,
3501 },
3502 { .ctl_name = 0 }
3503 };
3504
3505 /* Make sure that /proc/sys/dev is there */
3506 static ctl_table cdrom_root_table[] = {
3507 {
3508 .ctl_name = CTL_DEV,
3509 .procname = "dev",
3510 .maxlen = 0,
3511 .mode = 0555,
3512 .child = cdrom_cdrom_table,
3513 },
3514 { .ctl_name = 0 }
3515 };
3516 static struct ctl_table_header *cdrom_sysctl_header;
3517
3518 static void cdrom_sysctl_register(void)
3519 {
3520 static int initialized;
3521
3522 if (initialized == 1)
3523 return;
3524
3525 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3526
3527 /* set the defaults */
3528 cdrom_sysctl_settings.autoclose = autoclose;
3529 cdrom_sysctl_settings.autoeject = autoeject;
3530 cdrom_sysctl_settings.debug = debug;
3531 cdrom_sysctl_settings.lock = lockdoor;
3532 cdrom_sysctl_settings.check = check_media_type;
3533
3534 initialized = 1;
3535 }
3536
3537 static void cdrom_sysctl_unregister(void)
3538 {
3539 if (cdrom_sysctl_header)
3540 unregister_sysctl_table(cdrom_sysctl_header);
3541 }
3542
3543 #else /* CONFIG_SYSCTL */
3544
3545 static void cdrom_sysctl_register(void)
3546 {
3547 }
3548
3549 static void cdrom_sysctl_unregister(void)
3550 {
3551 }
3552
3553 #endif /* CONFIG_SYSCTL */
3554
3555 static int __init cdrom_init(void)
3556 {
3557 cdrom_sysctl_register();
3558
3559 return 0;
3560 }
3561
3562 static void __exit cdrom_exit(void)
3563 {
3564 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3565 cdrom_sysctl_unregister();
3566 }
3567
3568 module_init(cdrom_init);
3569 module_exit(cdrom_exit);
3570 MODULE_LICENSE("GPL");