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sched: make early bootup sched_clock() use safer
[wrt350n-kernel.git] / drivers / cdrom / cdrom.c
blobdb259e60289b51ca84b46f56f67a741b0c473c16
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 #ifdef CONFIG_SYSCTL
364 static void cdrom_sysctl_register(void);
365 #endif /* CONFIG_SYSCTL */
366 static struct cdrom_device_info *topCdromPtr;
367
368 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
369 struct packet_command *cgc)
370 {
371 if (cgc->sense) {
372 cgc->sense->sense_key = 0x05;
373 cgc->sense->asc = 0x20;
374 cgc->sense->ascq = 0x00;
375 }
376
377 cgc->stat = -EIO;
378 return -EIO;
379 }
380
381 /* This macro makes sure we don't have to check on cdrom_device_ops
382 * existence in the run-time routines below. Change_capability is a
383 * hack to have the capability flags defined const, while we can still
384 * change it here without gcc complaining at every line.
385 */
386 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
387
388 int register_cdrom(struct cdrom_device_info *cdi)
389 {
390 static char banner_printed;
391 struct cdrom_device_ops *cdo = cdi->ops;
392 int *change_capability = (int *)&cdo->capability; /* hack */
393
394 cdinfo(CD_OPEN, "entering register_cdrom\n");
395
396 if (cdo->open == NULL || cdo->release == NULL)
397 return -2;
398 if (!banner_printed) {
399 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
400 banner_printed = 1;
401 #ifdef CONFIG_SYSCTL
402 cdrom_sysctl_register();
403 #endif /* CONFIG_SYSCTL */
404 }
405
406 ENSURE(drive_status, CDC_DRIVE_STATUS );
407 ENSURE(media_changed, CDC_MEDIA_CHANGED);
408 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
409 ENSURE(lock_door, CDC_LOCK);
410 ENSURE(select_speed, CDC_SELECT_SPEED);
411 ENSURE(get_last_session, CDC_MULTI_SESSION);
412 ENSURE(get_mcn, CDC_MCN);
413 ENSURE(reset, CDC_RESET);
414 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
415 ENSURE(generic_packet, CDC_GENERIC_PACKET);
416 cdi->mc_flags = 0;
417 cdo->n_minors = 0;
418 cdi->options = CDO_USE_FFLAGS;
419
420 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
421 cdi->options |= (int) CDO_AUTO_CLOSE;
422 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
423 cdi->options |= (int) CDO_AUTO_EJECT;
424 if (lockdoor==1)
425 cdi->options |= (int) CDO_LOCK;
426 if (check_media_type==1)
427 cdi->options |= (int) CDO_CHECK_TYPE;
428
429 if (CDROM_CAN(CDC_MRW_W))
430 cdi->exit = cdrom_mrw_exit;
431
432 if (cdi->disk)
433 cdi->cdda_method = CDDA_BPC_FULL;
434 else
435 cdi->cdda_method = CDDA_OLD;
436
437 if (!cdo->generic_packet)
438 cdo->generic_packet = cdrom_dummy_generic_packet;
439
440 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
441 mutex_lock(&cdrom_mutex);
442 cdi->next = topCdromPtr;
443 topCdromPtr = cdi;
444 mutex_unlock(&cdrom_mutex);
445 return 0;
446 }
447 #undef ENSURE
448
449 int unregister_cdrom(struct cdrom_device_info *unreg)
450 {
451 struct cdrom_device_info *cdi, *prev;
452 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
453
454 prev = NULL;
455 mutex_lock(&cdrom_mutex);
456 cdi = topCdromPtr;
457 while (cdi && cdi != unreg) {
458 prev = cdi;
459 cdi = cdi->next;
460 }
461
462 if (cdi == NULL) {
463 mutex_unlock(&cdrom_mutex);
464 return -2;
465 }
466 if (prev)
467 prev->next = cdi->next;
468 else
469 topCdromPtr = cdi->next;
470
471 mutex_unlock(&cdrom_mutex);
472
473 if (cdi->exit)
474 cdi->exit(cdi);
475
476 cdi->ops->n_minors--;
477 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
478 return 0;
479 }
480
481 int cdrom_get_media_event(struct cdrom_device_info *cdi,
482 struct media_event_desc *med)
483 {
484 struct packet_command cgc;
485 unsigned char buffer[8];
486 struct event_header *eh = (struct event_header *) buffer;
487
488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
489 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
490 cgc.cmd[1] = 1; /* IMMED */
491 cgc.cmd[4] = 1 << 4; /* media event */
492 cgc.cmd[8] = sizeof(buffer);
493 cgc.quiet = 1;
494
495 if (cdi->ops->generic_packet(cdi, &cgc))
496 return 1;
497
498 if (be16_to_cpu(eh->data_len) < sizeof(*med))
499 return 1;
500
501 if (eh->nea || eh->notification_class != 0x4)
502 return 1;
503
504 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
505 return 0;
506 }
507
508 /*
509 * the first prototypes used 0x2c as the page code for the mrw mode page,
510 * subsequently this was changed to 0x03. probe the one used by this drive
511 */
512 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
513 {
514 struct packet_command cgc;
515 char buffer[16];
516
517 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
518
519 cgc.timeout = HZ;
520 cgc.quiet = 1;
521
522 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
523 cdi->mrw_mode_page = MRW_MODE_PC;
524 return 0;
525 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
526 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
527 return 0;
528 }
529
530 return 1;
531 }
532
533 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
534 {
535 struct packet_command cgc;
536 struct mrw_feature_desc *mfd;
537 unsigned char buffer[16];
538 int ret;
539
540 *write = 0;
541
542 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
543
544 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
545 cgc.cmd[3] = CDF_MRW;
546 cgc.cmd[8] = sizeof(buffer);
547 cgc.quiet = 1;
548
549 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
550 return ret;
551
552 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
553 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
554 return 1;
555 *write = mfd->write;
556
557 if ((ret = cdrom_mrw_probe_pc(cdi))) {
558 *write = 0;
559 return ret;
560 }
561
562 return 0;
563 }
564
565 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
566 {
567 struct packet_command cgc;
568 unsigned char buffer[12];
569 int ret;
570
571 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
572
573 /*
574 * FmtData bit set (bit 4), format type is 1
575 */
576 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
577 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
578 cgc.cmd[1] = (1 << 4) | 1;
579
580 cgc.timeout = 5 * 60 * HZ;
581
582 /*
583 * 4 byte format list header, 8 byte format list descriptor
584 */
585 buffer[1] = 1 << 1;
586 buffer[3] = 8;
587
588 /*
589 * nr_blocks field
590 */
591 buffer[4] = 0xff;
592 buffer[5] = 0xff;
593 buffer[6] = 0xff;
594 buffer[7] = 0xff;
595
596 buffer[8] = 0x24 << 2;
597 buffer[11] = cont;
598
599 ret = cdi->ops->generic_packet(cdi, &cgc);
600 if (ret)
601 printk(KERN_INFO "cdrom: bgformat failed\n");
602
603 return ret;
604 }
605
606 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
607 {
608 struct packet_command cgc;
609
610 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
611 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
612
613 /*
614 * Session = 1, Track = 0
615 */
616 cgc.cmd[1] = !!immed;
617 cgc.cmd[2] = 1 << 1;
618
619 cgc.timeout = 5 * 60 * HZ;
620
621 return cdi->ops->generic_packet(cdi, &cgc);
622 }
623
624 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
625 {
626 struct packet_command cgc;
627
628 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
629 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
630
631 cgc.timeout = 5 * 60 * HZ;
632
633 return cdi->ops->generic_packet(cdi, &cgc);
634 }
635
636 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
637 {
638 disc_information di;
639 int ret;
640
641 ret = cdrom_get_disc_info(cdi, &di);
642 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
643 return 1;
644
645 ret = 0;
646 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
647 printk(KERN_INFO "cdrom: issuing MRW back ground "
648 "format suspend\n");
649 ret = cdrom_mrw_bgformat_susp(cdi, 0);
650 }
651
652 if (!ret && cdi->media_written)
653 ret = cdrom_flush_cache(cdi);
654
655 return ret;
656 }
657
658 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
659 {
660 struct packet_command cgc;
661 struct mode_page_header *mph;
662 char buffer[16];
663 int ret, offset, size;
664
665 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
666
667 cgc.buffer = buffer;
668 cgc.buflen = sizeof(buffer);
669
670 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
671 return ret;
672
673 mph = (struct mode_page_header *) buffer;
674 offset = be16_to_cpu(mph->desc_length);
675 size = be16_to_cpu(mph->mode_data_length) + 2;
676
677 buffer[offset + 3] = space;
678 cgc.buflen = size;
679
680 if ((ret = cdrom_mode_select(cdi, &cgc)))
681 return ret;
682
683 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
684 return 0;
685 }
686
687 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
688 struct rwrt_feature_desc *rfd)
689 {
690 struct packet_command cgc;
691 char buffer[24];
692 int ret;
693
694 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
695
696 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
697 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
698 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
699 cgc.quiet = 1;
700
701 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
702 return ret;
703
704 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
705 return 0;
706 }
707
708 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
709 {
710 struct packet_command cgc;
711 char buffer[16];
712 __be16 *feature_code;
713 int ret;
714
715 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
716
717 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
718 cgc.cmd[3] = CDF_HWDM;
719 cgc.cmd[8] = sizeof(buffer);
720 cgc.quiet = 1;
721
722 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
723 return ret;
724
725 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
726 if (be16_to_cpu(*feature_code) == CDF_HWDM)
727 return 0;
728
729 return 1;
730 }
731
732
733 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
734 {
735 struct rwrt_feature_desc rfd;
736 int ret;
737
738 *write = 0;
739
740 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
741 return ret;
742
743 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
744 *write = 1;
745
746 return 0;
747 }
748
749 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
750 {
751 disc_information di;
752 int ret;
753
754 ret = cdrom_get_disc_info(cdi, &di);
755 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
756 return -1;
757
758 return di.erasable;
759 }
760
761 /*
762 * FIXME: check RO bit
763 */
764 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
765 {
766 int ret = cdrom_media_erasable(cdi);
767
768 /*
769 * allow writable open if media info read worked and media is
770 * erasable, _or_ if it fails since not all drives support it
771 */
772 if (!ret)
773 return 1;
774
775 return 0;
776 }
777
778 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
779 {
780 disc_information di;
781 int ret;
782
783 /*
784 * always reset to DMA lba space on open
785 */
786 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
787 printk(KERN_ERR "cdrom: failed setting lba address space\n");
788 return 1;
789 }
790
791 ret = cdrom_get_disc_info(cdi, &di);
792 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
793 return 1;
794
795 if (!di.erasable)
796 return 1;
797
798 /*
799 * mrw_status
800 * 0 - not MRW formatted
801 * 1 - MRW bgformat started, but not running or complete
802 * 2 - MRW bgformat in progress
803 * 3 - MRW formatting complete
804 */
805 ret = 0;
806 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
807 mrw_format_status[di.mrw_status]);
808 if (!di.mrw_status)
809 ret = 1;
810 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
811 mrw_format_restart)
812 ret = cdrom_mrw_bgformat(cdi, 1);
813
814 return ret;
815 }
816
817 static int mo_open_write(struct cdrom_device_info *cdi)
818 {
819 struct packet_command cgc;
820 char buffer[255];
821 int ret;
822
823 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
824 cgc.quiet = 1;
825
826 /*
827 * obtain write protect information as per
828 * drivers/scsi/sd.c:sd_read_write_protect_flag
829 */
830
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
832 if (ret)
833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
834 if (ret) {
835 cgc.buflen = 255;
836 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
837 }
838
839 /* drive gave us no info, let the user go ahead */
840 if (ret)
841 return 0;
842
843 return buffer[3] & 0x80;
844 }
845
846 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
847 {
848 struct rwrt_feature_desc rfd;
849 int ret;
850
851 if ((ret = cdrom_has_defect_mgt(cdi)))
852 return ret;
853
854 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
855 return ret;
856 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
857 ret = !rfd.curr;
858
859 cdinfo(CD_OPEN, "can open for random write\n");
860 return ret;
861 }
862
863 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
864 {
865 struct packet_command cgc;
866 char buffer[32];
867 int ret, mmc3_profile;
868
869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
870
871 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
872 cgc.cmd[1] = 0;
873 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
874 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
875 cgc.quiet = 1;
876
877 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
878 mmc3_profile = 0xffff;
879 else
880 mmc3_profile = (buffer[6] << 8) | buffer[7];
881
882 cdi->mmc3_profile = mmc3_profile;
883 }
884
885 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
886 {
887 switch (cdi->mmc3_profile) {
888 case 0x12: /* DVD-RAM */
889 case 0x1A: /* DVD+RW */
890 return 0;
891 default:
892 return 1;
893 }
894 }
895
896 /*
897 * returns 0 for ok to open write, non-0 to disallow
898 */
899 static int cdrom_open_write(struct cdrom_device_info *cdi)
900 {
901 int mrw, mrw_write, ram_write;
902 int ret = 1;
903
904 mrw = 0;
905 if (!cdrom_is_mrw(cdi, &mrw_write))
906 mrw = 1;
907
908 if (CDROM_CAN(CDC_MO_DRIVE))
909 ram_write = 1;
910 else
911 (void) cdrom_is_random_writable(cdi, &ram_write);
912
913 if (mrw)
914 cdi->mask &= ~CDC_MRW;
915 else
916 cdi->mask |= CDC_MRW;
917
918 if (mrw_write)
919 cdi->mask &= ~CDC_MRW_W;
920 else
921 cdi->mask |= CDC_MRW_W;
922
923 if (ram_write)
924 cdi->mask &= ~CDC_RAM;
925 else
926 cdi->mask |= CDC_RAM;
927
928 if (CDROM_CAN(CDC_MRW_W))
929 ret = cdrom_mrw_open_write(cdi);
930 else if (CDROM_CAN(CDC_DVD_RAM))
931 ret = cdrom_dvdram_open_write(cdi);
932 else if (CDROM_CAN(CDC_RAM) &&
933 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
934 ret = cdrom_ram_open_write(cdi);
935 else if (CDROM_CAN(CDC_MO_DRIVE))
936 ret = mo_open_write(cdi);
937 else if (!cdrom_is_dvd_rw(cdi))
938 ret = 0;
939
940 return ret;
941 }
942
943 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
944 {
945 struct packet_command cgc;
946
947 if (cdi->mmc3_profile != 0x1a) {
948 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
949 return;
950 }
951
952 if (!cdi->media_written) {
953 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
954 return;
955 }
956
957 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
958 cdi->name);
959
960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
961 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
962 cgc.timeout = 30*HZ;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.timeout = 3000*HZ;
968 cgc.quiet = 1;
969 cdi->ops->generic_packet(cdi, &cgc);
970
971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
972 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
973 cgc.cmd[2] = 2; /* Close session */
974 cgc.quiet = 1;
975 cgc.timeout = 3000*HZ;
976 cdi->ops->generic_packet(cdi, &cgc);
977
978 cdi->media_written = 0;
979 }
980
981 static int cdrom_close_write(struct cdrom_device_info *cdi)
982 {
983 #if 0
984 return cdrom_flush_cache(cdi);
985 #else
986 return 0;
987 #endif
988 }
989
990 /* We use the open-option O_NONBLOCK to indicate that the
991 * purpose of opening is only for subsequent ioctl() calls; no device
992 * integrity checks are performed.
993 *
994 * We hope that all cd-player programs will adopt this convention. It
995 * is in their own interest: device control becomes a lot easier
996 * this way.
997 */
998 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
999 {
1000 int ret;
1001
1002 cdinfo(CD_OPEN, "entering cdrom_open\n");
1003
1004 /* if this was a O_NONBLOCK open and we should honor the flags,
1005 * do a quick open without drive/disc integrity checks. */
1006 cdi->use_count++;
1007 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
1008 ret = cdi->ops->open(cdi, 1);
1009 } else {
1010 ret = open_for_data(cdi);
1011 if (ret)
1012 goto err;
1013 cdrom_mmc3_profile(cdi);
1014 if (fp->f_mode & FMODE_WRITE) {
1015 ret = -EROFS;
1016 if (cdrom_open_write(cdi))
1017 goto err_release;
1018 if (!CDROM_CAN(CDC_RAM))
1019 goto err_release;
1020 ret = 0;
1021 cdi->media_written = 0;
1022 }
1023 }
1024
1025 if (ret)
1026 goto err;
1027
1028 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1029 cdi->name, cdi->use_count);
1030 /* Do this on open. Don't wait for mount, because they might
1031 not be mounting, but opening with O_NONBLOCK */
1032 check_disk_change(ip->i_bdev);
1033 return 0;
1034 err_release:
1035 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1036 cdi->ops->lock_door(cdi, 0);
1037 cdinfo(CD_OPEN, "door unlocked.\n");
1038 }
1039 cdi->ops->release(cdi);
1040 err:
1041 cdi->use_count--;
1042 return ret;
1043 }
1044
1045 static
1046 int open_for_data(struct cdrom_device_info * cdi)
1047 {
1048 int ret;
1049 struct cdrom_device_ops *cdo = cdi->ops;
1050 tracktype tracks;
1051 cdinfo(CD_OPEN, "entering open_for_data\n");
1052 /* Check if the driver can report drive status. If it can, we
1053 can do clever things. If it can't, well, we at least tried! */
1054 if (cdo->drive_status != NULL) {
1055 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1056 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1057 if (ret == CDS_TRAY_OPEN) {
1058 cdinfo(CD_OPEN, "the tray is open...\n");
1059 /* can/may i close it? */
1060 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1061 cdi->options & CDO_AUTO_CLOSE) {
1062 cdinfo(CD_OPEN, "trying to close the tray.\n");
1063 ret=cdo->tray_move(cdi,0);
1064 if (ret) {
1065 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1066 /* Ignore the error from the low
1067 level driver. We don't care why it
1068 couldn't close the tray. We only care
1069 that there is no disc in the drive,
1070 since that is the _REAL_ problem here.*/
1071 ret=-ENOMEDIUM;
1072 goto clean_up_and_return;
1073 }
1074 } else {
1075 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1076 ret=-ENOMEDIUM;
1077 goto clean_up_and_return;
1078 }
1079 /* Ok, the door should be closed now.. Check again */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1082 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1083 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1084 ret=-ENOMEDIUM;
1085 goto clean_up_and_return;
1086 }
1087 cdinfo(CD_OPEN, "the tray is now closed.\n");
1088 }
1089 /* the door should be closed now, check for the disc */
1090 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1091 if (ret!=CDS_DISC_OK) {
1092 ret = -ENOMEDIUM;
1093 goto clean_up_and_return;
1094 }
1095 }
1096 cdrom_count_tracks(cdi, &tracks);
1097 if (tracks.error == CDS_NO_DISC) {
1098 cdinfo(CD_OPEN, "bummer. no disc.\n");
1099 ret=-ENOMEDIUM;
1100 goto clean_up_and_return;
1101 }
1102 /* CD-Players which don't use O_NONBLOCK, workman
1103 * for example, need bit CDO_CHECK_TYPE cleared! */
1104 if (tracks.data==0) {
1105 if (cdi->options & CDO_CHECK_TYPE) {
1106 /* give people a warning shot, now that CDO_CHECK_TYPE
1107 is the default case! */
1108 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1109 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1110 (unsigned int)task_pid_nr(current));
1111 ret=-EMEDIUMTYPE;
1112 goto clean_up_and_return;
1113 }
1114 else {
1115 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1116 }
1117 }
1118
1119 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1120
1121 /* all seems well, we can open the device */
1122 ret = cdo->open(cdi, 0); /* open for data */
1123 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1124 /* After all this careful checking, we shouldn't have problems
1125 opening the device, but we don't want the device locked if
1126 this somehow fails... */
1127 if (ret) {
1128 cdinfo(CD_OPEN, "open device failed.\n");
1129 goto clean_up_and_return;
1130 }
1131 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1132 cdo->lock_door(cdi, 1);
1133 cdinfo(CD_OPEN, "door locked.\n");
1134 }
1135 cdinfo(CD_OPEN, "device opened successfully.\n");
1136 return ret;
1137
1138 /* Something failed. Try to unlock the drive, because some drivers
1139 (notably ide-cd) lock the drive after every command. This produced
1140 a nasty bug where after mount failed, the drive would remain locked!
1141 This ensures that the drive gets unlocked after a mount fails. This
1142 is a goto to avoid bloating the driver with redundant code. */
1143 clean_up_and_return:
1144 cdinfo(CD_OPEN, "open failed.\n");
1145 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1146 cdo->lock_door(cdi, 0);
1147 cdinfo(CD_OPEN, "door unlocked.\n");
1148 }
1149 return ret;
1150 }
1151
1152 /* This code is similar to that in open_for_data. The routine is called
1153 whenever an audio play operation is requested.
1154 */
1155 int check_for_audio_disc(struct cdrom_device_info * cdi,
1156 struct cdrom_device_ops * cdo)
1157 {
1158 int ret;
1159 tracktype tracks;
1160 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1161 if (!(cdi->options & CDO_CHECK_TYPE))
1162 return 0;
1163 if (cdo->drive_status != NULL) {
1164 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1165 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1166 if (ret == CDS_TRAY_OPEN) {
1167 cdinfo(CD_OPEN, "the tray is open...\n");
1168 /* can/may i close it? */
1169 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1170 cdi->options & CDO_AUTO_CLOSE) {
1171 cdinfo(CD_OPEN, "trying to close the tray.\n");
1172 ret=cdo->tray_move(cdi,0);
1173 if (ret) {
1174 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1175 /* Ignore the error from the low
1176 level driver. We don't care why it
1177 couldn't close the tray. We only care
1178 that there is no disc in the drive,
1179 since that is the _REAL_ problem here.*/
1180 return -ENOMEDIUM;
1181 }
1182 } else {
1183 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1184 return -ENOMEDIUM;
1185 }
1186 /* Ok, the door should be closed now.. Check again */
1187 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1188 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1189 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1190 return -ENOMEDIUM;
1191 }
1192 if (ret!=CDS_DISC_OK) {
1193 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1194 return -EIO;
1195 }
1196 cdinfo(CD_OPEN, "the tray is now closed.\n");
1197 }
1198 }
1199 cdrom_count_tracks(cdi, &tracks);
1200 if (tracks.error)
1201 return(tracks.error);
1202
1203 if (tracks.audio==0)
1204 return -EMEDIUMTYPE;
1205
1206 return 0;
1207 }
1208
1209 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1210 {
1211 struct cdrom_device_ops *cdo = cdi->ops;
1212 int opened_for_data;
1213
1214 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1215
1216 if (cdi->use_count > 0)
1217 cdi->use_count--;
1218
1219 if (cdi->use_count == 0) {
1220 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1221 cdrom_dvd_rw_close_write(cdi);
1222
1223 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1224 cdinfo(CD_CLOSE, "Unlocking door!\n");
1225 cdo->lock_door(cdi, 0);
1226 }
1227 }
1228
1229 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1230 !(fp && fp->f_flags & O_NONBLOCK);
1231
1232 /*
1233 * flush cache on last write release
1234 */
1235 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1236 cdrom_close_write(cdi);
1237
1238 cdo->release(cdi);
1239 if (cdi->use_count == 0) { /* last process that closes dev*/
1240 if (opened_for_data &&
1241 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1242 cdo->tray_move(cdi, 1);
1243 }
1244 return 0;
1245 }
1246
1247 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1248 struct cdrom_changer_info *buf)
1249 {
1250 struct packet_command cgc;
1251 struct cdrom_device_ops *cdo = cdi->ops;
1252 int length;
1253
1254 /*
1255 * Sanyo changer isn't spec compliant (doesn't use regular change
1256 * LOAD_UNLOAD command, and it doesn't implement the mech status
1257 * command below
1258 */
1259 if (cdi->sanyo_slot) {
1260 buf->hdr.nslots = 3;
1261 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1262 for (length = 0; length < 3; length++) {
1263 buf->slots[length].disc_present = 1;
1264 buf->slots[length].change = 0;
1265 }
1266 return 0;
1267 }
1268
1269 length = sizeof(struct cdrom_mechstat_header) +
1270 cdi->capacity * sizeof(struct cdrom_slot);
1271
1272 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1273 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1274 cgc.cmd[8] = (length >> 8) & 0xff;
1275 cgc.cmd[9] = length & 0xff;
1276 return cdo->generic_packet(cdi, &cgc);
1277 }
1278
1279 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1280 {
1281 struct cdrom_changer_info *info;
1282 int ret;
1283
1284 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1285 if (cdi->sanyo_slot)
1286 return CDS_NO_INFO;
1287
1288 info = kmalloc(sizeof(*info), GFP_KERNEL);
1289 if (!info)
1290 return -ENOMEM;
1291
1292 if ((ret = cdrom_read_mech_status(cdi, info)))
1293 goto out_free;
1294
1295 if (info->slots[slot].disc_present)
1296 ret = CDS_DISC_OK;
1297 else
1298 ret = CDS_NO_DISC;
1299
1300 out_free:
1301 kfree(info);
1302 return ret;
1303 }
1304
1305 /* Return the number of slots for an ATAPI/SCSI cdrom,
1306 * return 1 if not a changer.
1307 */
1308 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1309 {
1310 int status;
1311 int nslots = 1;
1312 struct cdrom_changer_info *info;
1313
1314 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1315 /* cdrom_read_mech_status requires a valid value for capacity: */
1316 cdi->capacity = 0;
1317
1318 info = kmalloc(sizeof(*info), GFP_KERNEL);
1319 if (!info)
1320 return -ENOMEM;
1321
1322 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1323 nslots = info->hdr.nslots;
1324
1325 kfree(info);
1326 return nslots;
1327 }
1328
1329
1330 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1331 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1332 {
1333 struct packet_command cgc;
1334
1335 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1336 if (cdi->sanyo_slot && slot < 0)
1337 return 0;
1338
1339 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1340 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1341 cgc.cmd[4] = 2 + (slot >= 0);
1342 cgc.cmd[8] = slot;
1343 cgc.timeout = 60 * HZ;
1344
1345 /* The Sanyo 3 CD changer uses byte 7 of the
1346 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1347 using the GPCMD_LOAD_UNLOAD opcode. */
1348 if (cdi->sanyo_slot && -1 < slot) {
1349 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1350 cgc.cmd[7] = slot;
1351 cgc.cmd[4] = cgc.cmd[8] = 0;
1352 cdi->sanyo_slot = slot ? slot : 3;
1353 }
1354
1355 return cdi->ops->generic_packet(cdi, &cgc);
1356 }
1357
1358 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1359 {
1360 struct cdrom_changer_info *info;
1361 int curslot;
1362 int ret;
1363
1364 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1365 if (!CDROM_CAN(CDC_SELECT_DISC))
1366 return -EDRIVE_CANT_DO_THIS;
1367
1368 (void) cdi->ops->media_changed(cdi, slot);
1369
1370 if (slot == CDSL_NONE) {
1371 /* set media changed bits, on both queues */
1372 cdi->mc_flags = 0x3;
1373 return cdrom_load_unload(cdi, -1);
1374 }
1375
1376 info = kmalloc(sizeof(*info), GFP_KERNEL);
1377 if (!info)
1378 return -ENOMEM;
1379
1380 if ((ret = cdrom_read_mech_status(cdi, info))) {
1381 kfree(info);
1382 return ret;
1383 }
1384
1385 curslot = info->hdr.curslot;
1386 kfree(info);
1387
1388 if (cdi->use_count > 1 || keeplocked) {
1389 if (slot == CDSL_CURRENT) {
1390 return curslot;
1391 } else {
1392 return -EBUSY;
1393 }
1394 }
1395
1396 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1397 which is useful if it had been previously unloaded.
1398 Whether it can or not, it returns the current slot.
1399 Similarly, if slot happens to be the current one, we still
1400 try and load it. */
1401 if (slot == CDSL_CURRENT)
1402 slot = curslot;
1403
1404 /* set media changed bits on both queues */
1405 cdi->mc_flags = 0x3;
1406 if ((ret = cdrom_load_unload(cdi, slot)))
1407 return ret;
1408
1409 return slot;
1410 }
1411
1412 /* We want to make media_changed accessible to the user through an
1413 * ioctl. The main problem now is that we must double-buffer the
1414 * low-level implementation, to assure that the VFS and the user both
1415 * see a medium change once.
1416 */
1417
1418 static
1419 int media_changed(struct cdrom_device_info *cdi, int queue)
1420 {
1421 unsigned int mask = (1 << (queue & 1));
1422 int ret = !!(cdi->mc_flags & mask);
1423
1424 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1425 return ret;
1426 /* changed since last call? */
1427 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1428 cdi->mc_flags = 0x3; /* set bit on both queues */
1429 ret |= 1;
1430 cdi->media_written = 0;
1431 }
1432 cdi->mc_flags &= ~mask; /* clear bit */
1433 return ret;
1434 }
1435
1436 int cdrom_media_changed(struct cdrom_device_info *cdi)
1437 {
1438 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1439 * Returning "0" is always safe (media hasn't been changed). Do that
1440 * if the low-level cdrom driver dosn't support media changed. */
1441 if (cdi == NULL || cdi->ops->media_changed == NULL)
1442 return 0;
1443 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1444 return 0;
1445 return media_changed(cdi, 0);
1446 }
1447
1448 /* badly broken, I know. Is due for a fixup anytime. */
1449 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1450 {
1451 struct cdrom_tochdr header;
1452 struct cdrom_tocentry entry;
1453 int ret, i;
1454 tracks->data=0;
1455 tracks->audio=0;
1456 tracks->cdi=0;
1457 tracks->xa=0;
1458 tracks->error=0;
1459 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1460 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1461 tracks->error=CDS_NO_INFO;
1462 return;
1463 }
1464 /* Grab the TOC header so we can see how many tracks there are */
1465 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1466 if (ret == -ENOMEDIUM)
1467 tracks->error = CDS_NO_DISC;
1468 else
1469 tracks->error = CDS_NO_INFO;
1470 return;
1471 }
1472 /* check what type of tracks are on this disc */
1473 entry.cdte_format = CDROM_MSF;
1474 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1475 entry.cdte_track = i;
1476 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1477 tracks->error=CDS_NO_INFO;
1478 return;
1479 }
1480 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1481 if (entry.cdte_format == 0x10)
1482 tracks->cdi++;
1483 else if (entry.cdte_format == 0x20)
1484 tracks->xa++;
1485 else
1486 tracks->data++;
1487 } else
1488 tracks->audio++;
1489 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1490 i, entry.cdte_format, entry.cdte_ctrl);
1491 }
1492 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1493 header.cdth_trk1, tracks->audio, tracks->data,
1494 tracks->cdi, tracks->xa);
1495 }
1496
1497 /* Requests to the low-level drivers will /always/ be done in the
1498 following format convention:
1499
1500 CDROM_LBA: all data-related requests.
1501 CDROM_MSF: all audio-related requests.
1502
1503 However, a low-level implementation is allowed to refuse this
1504 request, and return information in its own favorite format.
1505
1506 It doesn't make sense /at all/ to ask for a play_audio in LBA
1507 format, or ask for multi-session info in MSF format. However, for
1508 backward compatibility these format requests will be satisfied, but
1509 the requests to the low-level drivers will be sanitized in the more
1510 meaningful format indicated above.
1511 */
1512
1513 static
1514 void sanitize_format(union cdrom_addr *addr,
1515 u_char * curr, u_char requested)
1516 {
1517 if (*curr == requested)
1518 return; /* nothing to be done! */
1519 if (requested == CDROM_LBA) {
1520 addr->lba = (int) addr->msf.frame +
1521 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1522 } else { /* CDROM_MSF */
1523 int lba = addr->lba;
1524 addr->msf.frame = lba % 75;
1525 lba /= 75;
1526 lba += 2;
1527 addr->msf.second = lba % 60;
1528 addr->msf.minute = lba / 60;
1529 }
1530 *curr = requested;
1531 }
1532
1533 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1534 int type)
1535 {
1536 memset(cgc, 0, sizeof(struct packet_command));
1537 if (buf)
1538 memset(buf, 0, len);
1539 cgc->buffer = (char *) buf;
1540 cgc->buflen = len;
1541 cgc->data_direction = type;
1542 cgc->timeout = CDROM_DEF_TIMEOUT;
1543 }
1544
1545 /* DVD handling */
1546
1547 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1548 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1549
1550 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1551 {
1552 cgc->cmd[0] = GPCMD_REPORT_KEY;
1553 cgc->cmd[10] = type | (agid << 6);
1554 switch (type) {
1555 case 0: case 8: case 5: {
1556 cgc->buflen = 8;
1557 break;
1558 }
1559 case 1: {
1560 cgc->buflen = 16;
1561 break;
1562 }
1563 case 2: case 4: {
1564 cgc->buflen = 12;
1565 break;
1566 }
1567 }
1568 cgc->cmd[9] = cgc->buflen;
1569 cgc->data_direction = CGC_DATA_READ;
1570 }
1571
1572 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1573 {
1574 cgc->cmd[0] = GPCMD_SEND_KEY;
1575 cgc->cmd[10] = type | (agid << 6);
1576 switch (type) {
1577 case 1: {
1578 cgc->buflen = 16;
1579 break;
1580 }
1581 case 3: {
1582 cgc->buflen = 12;
1583 break;
1584 }
1585 case 6: {
1586 cgc->buflen = 8;
1587 break;
1588 }
1589 }
1590 cgc->cmd[9] = cgc->buflen;
1591 cgc->data_direction = CGC_DATA_WRITE;
1592 }
1593
1594 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1595 {
1596 int ret;
1597 u_char buf[20];
1598 struct packet_command cgc;
1599 struct cdrom_device_ops *cdo = cdi->ops;
1600 rpc_state_t rpc_state;
1601
1602 memset(buf, 0, sizeof(buf));
1603 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1604
1605 switch (ai->type) {
1606 /* LU data send */
1607 case DVD_LU_SEND_AGID:
1608 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1609 cgc.quiet = 1;
1610 setup_report_key(&cgc, ai->lsa.agid, 0);
1611
1612 if ((ret = cdo->generic_packet(cdi, &cgc)))
1613 return ret;
1614
1615 ai->lsa.agid = buf[7] >> 6;
1616 /* Returning data, let host change state */
1617 break;
1618
1619 case DVD_LU_SEND_KEY1:
1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1621 setup_report_key(&cgc, ai->lsk.agid, 2);
1622
1623 if ((ret = cdo->generic_packet(cdi, &cgc)))
1624 return ret;
1625
1626 copy_key(ai->lsk.key, &buf[4]);
1627 /* Returning data, let host change state */
1628 break;
1629
1630 case DVD_LU_SEND_CHALLENGE:
1631 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1632 setup_report_key(&cgc, ai->lsc.agid, 1);
1633
1634 if ((ret = cdo->generic_packet(cdi, &cgc)))
1635 return ret;
1636
1637 copy_chal(ai->lsc.chal, &buf[4]);
1638 /* Returning data, let host change state */
1639 break;
1640
1641 /* Post-auth key */
1642 case DVD_LU_SEND_TITLE_KEY:
1643 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1644 cgc.quiet = 1;
1645 setup_report_key(&cgc, ai->lstk.agid, 4);
1646 cgc.cmd[5] = ai->lstk.lba;
1647 cgc.cmd[4] = ai->lstk.lba >> 8;
1648 cgc.cmd[3] = ai->lstk.lba >> 16;
1649 cgc.cmd[2] = ai->lstk.lba >> 24;
1650
1651 if ((ret = cdo->generic_packet(cdi, &cgc)))
1652 return ret;
1653
1654 ai->lstk.cpm = (buf[4] >> 7) & 1;
1655 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1656 ai->lstk.cgms = (buf[4] >> 4) & 3;
1657 copy_key(ai->lstk.title_key, &buf[5]);
1658 /* Returning data, let host change state */
1659 break;
1660
1661 case DVD_LU_SEND_ASF:
1662 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1663 setup_report_key(&cgc, ai->lsasf.agid, 5);
1664
1665 if ((ret = cdo->generic_packet(cdi, &cgc)))
1666 return ret;
1667
1668 ai->lsasf.asf = buf[7] & 1;
1669 break;
1670
1671 /* LU data receive (LU changes state) */
1672 case DVD_HOST_SEND_CHALLENGE:
1673 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1674 setup_send_key(&cgc, ai->hsc.agid, 1);
1675 buf[1] = 0xe;
1676 copy_chal(&buf[4], ai->hsc.chal);
1677
1678 if ((ret = cdo->generic_packet(cdi, &cgc)))
1679 return ret;
1680
1681 ai->type = DVD_LU_SEND_KEY1;
1682 break;
1683
1684 case DVD_HOST_SEND_KEY2:
1685 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1686 setup_send_key(&cgc, ai->hsk.agid, 3);
1687 buf[1] = 0xa;
1688 copy_key(&buf[4], ai->hsk.key);
1689
1690 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1691 ai->type = DVD_AUTH_FAILURE;
1692 return ret;
1693 }
1694 ai->type = DVD_AUTH_ESTABLISHED;
1695 break;
1696
1697 /* Misc */
1698 case DVD_INVALIDATE_AGID:
1699 cgc.quiet = 1;
1700 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1701 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1702 if ((ret = cdo->generic_packet(cdi, &cgc)))
1703 return ret;
1704 break;
1705
1706 /* Get region settings */
1707 case DVD_LU_SEND_RPC_STATE:
1708 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1709 setup_report_key(&cgc, 0, 8);
1710 memset(&rpc_state, 0, sizeof(rpc_state_t));
1711 cgc.buffer = (char *) &rpc_state;
1712
1713 if ((ret = cdo->generic_packet(cdi, &cgc)))
1714 return ret;
1715
1716 ai->lrpcs.type = rpc_state.type_code;
1717 ai->lrpcs.vra = rpc_state.vra;
1718 ai->lrpcs.ucca = rpc_state.ucca;
1719 ai->lrpcs.region_mask = rpc_state.region_mask;
1720 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1721 break;
1722
1723 /* Set region settings */
1724 case DVD_HOST_SEND_RPC_STATE:
1725 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1726 setup_send_key(&cgc, 0, 6);
1727 buf[1] = 6;
1728 buf[4] = ai->hrpcs.pdrc;
1729
1730 if ((ret = cdo->generic_packet(cdi, &cgc)))
1731 return ret;
1732 break;
1733
1734 default:
1735 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1736 return -ENOTTY;
1737 }
1738
1739 return 0;
1740 }
1741
1742 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1743 {
1744 unsigned char buf[21], *base;
1745 struct dvd_layer *layer;
1746 struct packet_command cgc;
1747 struct cdrom_device_ops *cdo = cdi->ops;
1748 int ret, layer_num = s->physical.layer_num;
1749
1750 if (layer_num >= DVD_LAYERS)
1751 return -EINVAL;
1752
1753 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1754 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1755 cgc.cmd[6] = layer_num;
1756 cgc.cmd[7] = s->type;
1757 cgc.cmd[9] = cgc.buflen & 0xff;
1758
1759 /*
1760 * refrain from reporting errors on non-existing layers (mainly)
1761 */
1762 cgc.quiet = 1;
1763
1764 if ((ret = cdo->generic_packet(cdi, &cgc)))
1765 return ret;
1766
1767 base = &buf[4];
1768 layer = &s->physical.layer[layer_num];
1769
1770 /*
1771 * place the data... really ugly, but at least we won't have to
1772 * worry about endianess in userspace.
1773 */
1774 memset(layer, 0, sizeof(*layer));
1775 layer->book_version = base[0] & 0xf;
1776 layer->book_type = base[0] >> 4;
1777 layer->min_rate = base[1] & 0xf;
1778 layer->disc_size = base[1] >> 4;
1779 layer->layer_type = base[2] & 0xf;
1780 layer->track_path = (base[2] >> 4) & 1;
1781 layer->nlayers = (base[2] >> 5) & 3;
1782 layer->track_density = base[3] & 0xf;
1783 layer->linear_density = base[3] >> 4;
1784 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1785 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1786 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1787 layer->bca = base[16] >> 7;
1788
1789 return 0;
1790 }
1791
1792 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1793 {
1794 int ret;
1795 u_char buf[8];
1796 struct packet_command cgc;
1797 struct cdrom_device_ops *cdo = cdi->ops;
1798
1799 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1800 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1801 cgc.cmd[6] = s->copyright.layer_num;
1802 cgc.cmd[7] = s->type;
1803 cgc.cmd[8] = cgc.buflen >> 8;
1804 cgc.cmd[9] = cgc.buflen & 0xff;
1805
1806 if ((ret = cdo->generic_packet(cdi, &cgc)))
1807 return ret;
1808
1809 s->copyright.cpst = buf[4];
1810 s->copyright.rmi = buf[5];
1811
1812 return 0;
1813 }
1814
1815 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1816 {
1817 int ret, size;
1818 u_char *buf;
1819 struct packet_command cgc;
1820 struct cdrom_device_ops *cdo = cdi->ops;
1821
1822 size = sizeof(s->disckey.value) + 4;
1823
1824 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1825 return -ENOMEM;
1826
1827 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1828 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1829 cgc.cmd[7] = s->type;
1830 cgc.cmd[8] = size >> 8;
1831 cgc.cmd[9] = size & 0xff;
1832 cgc.cmd[10] = s->disckey.agid << 6;
1833
1834 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1835 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1836
1837 kfree(buf);
1838 return ret;
1839 }
1840
1841 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1842 {
1843 int ret;
1844 u_char buf[4 + 188];
1845 struct packet_command cgc;
1846 struct cdrom_device_ops *cdo = cdi->ops;
1847
1848 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1849 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1850 cgc.cmd[7] = s->type;
1851 cgc.cmd[9] = cgc.buflen & 0xff;
1852
1853 if ((ret = cdo->generic_packet(cdi, &cgc)))
1854 return ret;
1855
1856 s->bca.len = buf[0] << 8 | buf[1];
1857 if (s->bca.len < 12 || s->bca.len > 188) {
1858 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1859 return -EIO;
1860 }
1861 memcpy(s->bca.value, &buf[4], s->bca.len);
1862
1863 return 0;
1864 }
1865
1866 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1867 {
1868 int ret = 0, size;
1869 u_char *buf;
1870 struct packet_command cgc;
1871 struct cdrom_device_ops *cdo = cdi->ops;
1872
1873 size = sizeof(s->manufact.value) + 4;
1874
1875 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1876 return -ENOMEM;
1877
1878 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1879 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1880 cgc.cmd[7] = s->type;
1881 cgc.cmd[8] = size >> 8;
1882 cgc.cmd[9] = size & 0xff;
1883
1884 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1885 kfree(buf);
1886 return ret;
1887 }
1888
1889 s->manufact.len = buf[0] << 8 | buf[1];
1890 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1891 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1892 " (%d)\n", s->manufact.len);
1893 ret = -EIO;
1894 } else {
1895 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1896 }
1897
1898 kfree(buf);
1899 return ret;
1900 }
1901
1902 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1903 {
1904 switch (s->type) {
1905 case DVD_STRUCT_PHYSICAL:
1906 return dvd_read_physical(cdi, s);
1907
1908 case DVD_STRUCT_COPYRIGHT:
1909 return dvd_read_copyright(cdi, s);
1910
1911 case DVD_STRUCT_DISCKEY:
1912 return dvd_read_disckey(cdi, s);
1913
1914 case DVD_STRUCT_BCA:
1915 return dvd_read_bca(cdi, s);
1916
1917 case DVD_STRUCT_MANUFACT:
1918 return dvd_read_manufact(cdi, s);
1919
1920 default:
1921 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1922 s->type);
1923 return -EINVAL;
1924 }
1925 }
1926
1927 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1928 struct packet_command *cgc,
1929 int page_code, int page_control)
1930 {
1931 struct cdrom_device_ops *cdo = cdi->ops;
1932
1933 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1934
1935 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1936 cgc->cmd[2] = page_code | (page_control << 6);
1937 cgc->cmd[7] = cgc->buflen >> 8;
1938 cgc->cmd[8] = cgc->buflen & 0xff;
1939 cgc->data_direction = CGC_DATA_READ;
1940 return cdo->generic_packet(cdi, cgc);
1941 }
1942
1943 int cdrom_mode_select(struct cdrom_device_info *cdi,
1944 struct packet_command *cgc)
1945 {
1946 struct cdrom_device_ops *cdo = cdi->ops;
1947
1948 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1949 memset(cgc->buffer, 0, 2);
1950 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1951 cgc->cmd[1] = 0x10; /* PF */
1952 cgc->cmd[7] = cgc->buflen >> 8;
1953 cgc->cmd[8] = cgc->buflen & 0xff;
1954 cgc->data_direction = CGC_DATA_WRITE;
1955 return cdo->generic_packet(cdi, cgc);
1956 }
1957
1958 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1959 struct cdrom_subchnl *subchnl, int mcn)
1960 {
1961 struct cdrom_device_ops *cdo = cdi->ops;
1962 struct packet_command cgc;
1963 char buffer[32];
1964 int ret;
1965
1966 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1967 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1968 cgc.cmd[1] = 2; /* MSF addressing */
1969 cgc.cmd[2] = 0x40; /* request subQ data */
1970 cgc.cmd[3] = mcn ? 2 : 1;
1971 cgc.cmd[8] = 16;
1972
1973 if ((ret = cdo->generic_packet(cdi, &cgc)))
1974 return ret;
1975
1976 subchnl->cdsc_audiostatus = cgc.buffer[1];
1977 subchnl->cdsc_format = CDROM_MSF;
1978 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1979 subchnl->cdsc_trk = cgc.buffer[6];
1980 subchnl->cdsc_ind = cgc.buffer[7];
1981
1982 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1983 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1984 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1985 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1986 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1987 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1988
1989 return 0;
1990 }
1991
1992 /*
1993 * Specific READ_10 interface
1994 */
1995 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1996 struct packet_command *cgc, int lba,
1997 int blocksize, int nblocks)
1998 {
1999 struct cdrom_device_ops *cdo = cdi->ops;
2000
2001 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2002 cgc->cmd[0] = GPCMD_READ_10;
2003 cgc->cmd[2] = (lba >> 24) & 0xff;
2004 cgc->cmd[3] = (lba >> 16) & 0xff;
2005 cgc->cmd[4] = (lba >> 8) & 0xff;
2006 cgc->cmd[5] = lba & 0xff;
2007 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2008 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2009 cgc->cmd[8] = nblocks & 0xff;
2010 cgc->buflen = blocksize * nblocks;
2011 return cdo->generic_packet(cdi, cgc);
2012 }
2013
2014 /* very generic interface for reading the various types of blocks */
2015 static int cdrom_read_block(struct cdrom_device_info *cdi,
2016 struct packet_command *cgc,
2017 int lba, int nblocks, int format, int blksize)
2018 {
2019 struct cdrom_device_ops *cdo = cdi->ops;
2020
2021 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2022 cgc->cmd[0] = GPCMD_READ_CD;
2023 /* expected sector size - cdda,mode1,etc. */
2024 cgc->cmd[1] = format << 2;
2025 /* starting address */
2026 cgc->cmd[2] = (lba >> 24) & 0xff;
2027 cgc->cmd[3] = (lba >> 16) & 0xff;
2028 cgc->cmd[4] = (lba >> 8) & 0xff;
2029 cgc->cmd[5] = lba & 0xff;
2030 /* number of blocks */
2031 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2032 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2033 cgc->cmd[8] = nblocks & 0xff;
2034 cgc->buflen = blksize * nblocks;
2035
2036 /* set the header info returned */
2037 switch (blksize) {
2038 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2039 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2040 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2041 default : cgc->cmd[9] = 0x10;
2042 }
2043
2044 return cdo->generic_packet(cdi, cgc);
2045 }
2046
2047 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2048 int lba, int nframes)
2049 {
2050 struct packet_command cgc;
2051 int ret = 0;
2052 int nr;
2053
2054 cdi->last_sense = 0;
2055
2056 memset(&cgc, 0, sizeof(cgc));
2057
2058 /*
2059 * start with will ra.nframes size, back down if alloc fails
2060 */
2061 nr = nframes;
2062 do {
2063 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2064 if (cgc.buffer)
2065 break;
2066
2067 nr >>= 1;
2068 } while (nr);
2069
2070 if (!nr)
2071 return -ENOMEM;
2072
2073 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2074 ret = -EFAULT;
2075 goto out;
2076 }
2077
2078 cgc.data_direction = CGC_DATA_READ;
2079 while (nframes > 0) {
2080 if (nr > nframes)
2081 nr = nframes;
2082
2083 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2084 if (ret)
2085 break;
2086 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2087 ret = -EFAULT;
2088 break;
2089 }
2090 ubuf += CD_FRAMESIZE_RAW * nr;
2091 nframes -= nr;
2092 lba += nr;
2093 }
2094 out:
2095 kfree(cgc.buffer);
2096 return ret;
2097 }
2098
2099 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2100 int lba, int nframes)
2101 {
2102 struct request_queue *q = cdi->disk->queue;
2103 struct request *rq;
2104 struct bio *bio;
2105 unsigned int len;
2106 int nr, ret = 0;
2107
2108 if (!q)
2109 return -ENXIO;
2110
2111 rq = blk_get_request(q, READ, GFP_KERNEL);
2112 if (!rq)
2113 return -ENOMEM;
2114
2115 cdi->last_sense = 0;
2116
2117 while (nframes) {
2118 nr = nframes;
2119 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2120 nr = 1;
2121 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2122 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2123
2124 len = nr * CD_FRAMESIZE_RAW;
2125
2126 ret = blk_rq_map_user(q, rq, ubuf, len);
2127 if (ret)
2128 break;
2129
2130 memset(rq->cmd, 0, sizeof(rq->cmd));
2131 rq->cmd[0] = GPCMD_READ_CD;
2132 rq->cmd[1] = 1 << 2;
2133 rq->cmd[2] = (lba >> 24) & 0xff;
2134 rq->cmd[3] = (lba >> 16) & 0xff;
2135 rq->cmd[4] = (lba >> 8) & 0xff;
2136 rq->cmd[5] = lba & 0xff;
2137 rq->cmd[6] = (nr >> 16) & 0xff;
2138 rq->cmd[7] = (nr >> 8) & 0xff;
2139 rq->cmd[8] = nr & 0xff;
2140 rq->cmd[9] = 0xf8;
2141
2142 rq->cmd_len = 12;
2143 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2144 rq->timeout = 60 * HZ;
2145 bio = rq->bio;
2146
2147 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2148 struct request_sense *s = rq->sense;
2149 ret = -EIO;
2150 cdi->last_sense = s->sense_key;
2151 }
2152
2153 if (blk_rq_unmap_user(bio))
2154 ret = -EFAULT;
2155
2156 if (ret)
2157 break;
2158
2159 nframes -= nr;
2160 lba += nr;
2161 ubuf += len;
2162 }
2163
2164 blk_put_request(rq);
2165 return ret;
2166 }
2167
2168 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2169 int lba, int nframes)
2170 {
2171 int ret;
2172
2173 if (cdi->cdda_method == CDDA_OLD)
2174 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2175
2176 retry:
2177 /*
2178 * for anything else than success and io error, we need to retry
2179 */
2180 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2181 if (!ret || ret != -EIO)
2182 return ret;
2183
2184 /*
2185 * I've seen drives get sense 4/8/3 udma crc errors on multi
2186 * frame dma, so drop to single frame dma if we need to
2187 */
2188 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2189 printk("cdrom: dropping to single frame dma\n");
2190 cdi->cdda_method = CDDA_BPC_SINGLE;
2191 goto retry;
2192 }
2193
2194 /*
2195 * so we have an io error of some sort with multi frame dma. if the
2196 * condition wasn't a hardware error
2197 * problems, not for any error
2198 */
2199 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2200 return ret;
2201
2202 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2203 cdi->cdda_method = CDDA_OLD;
2204 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2205 }
2206
2207 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2208 void __user *argp)
2209 {
2210 struct cdrom_multisession ms_info;
2211 u8 requested_format;
2212 int ret;
2213
2214 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2215
2216 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2217 return -ENOSYS;
2218
2219 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2220 return -EFAULT;
2221
2222 requested_format = ms_info.addr_format;
2223 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2224 return -EINVAL;
2225 ms_info.addr_format = CDROM_LBA;
2226
2227 ret = cdi->ops->get_last_session(cdi, &ms_info);
2228 if (ret)
2229 return ret;
2230
2231 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2232
2233 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2234 return -EFAULT;
2235
2236 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2237 return 0;
2238 }
2239
2240 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2241 {
2242 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2243
2244 if (!CDROM_CAN(CDC_OPEN_TRAY))
2245 return -ENOSYS;
2246 if (cdi->use_count != 1 || keeplocked)
2247 return -EBUSY;
2248 if (CDROM_CAN(CDC_LOCK)) {
2249 int ret = cdi->ops->lock_door(cdi, 0);
2250 if (ret)
2251 return ret;
2252 }
2253
2254 return cdi->ops->tray_move(cdi, 1);
2255 }
2256
2257 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2258 {
2259 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2260
2261 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2262 return -ENOSYS;
2263 return cdi->ops->tray_move(cdi, 0);
2264 }
2265
2266 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2267 unsigned long arg)
2268 {
2269 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2270
2271 if (!CDROM_CAN(CDC_OPEN_TRAY))
2272 return -ENOSYS;
2273 if (keeplocked)
2274 return -EBUSY;
2275
2276 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2277 if (arg)
2278 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2279 return 0;
2280 }
2281
2282 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2283 unsigned long arg)
2284 {
2285 struct cdrom_changer_info *info;
2286 int ret;
2287
2288 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2289
2290 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2291 return -ENOSYS;
2292
2293 /* cannot select disc or select current disc */
2294 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2295 return media_changed(cdi, 1);
2296
2297 if ((unsigned int)arg >= cdi->capacity)
2298 return -EINVAL;
2299
2300 info = kmalloc(sizeof(*info), GFP_KERNEL);
2301 if (!info)
2302 return -ENOMEM;
2303
2304 ret = cdrom_read_mech_status(cdi, info);
2305 if (!ret)
2306 ret = info->slots[arg].change;
2307 kfree(info);
2308 return ret;
2309 }
2310
2311 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2312 unsigned long arg)
2313 {
2314 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2315
2316 /*
2317 * Options need to be in sync with capability.
2318 * Too late for that, so we have to check each one separately.
2319 */
2320 switch (arg) {
2321 case CDO_USE_FFLAGS:
2322 case CDO_CHECK_TYPE:
2323 break;
2324 case CDO_LOCK:
2325 if (!CDROM_CAN(CDC_LOCK))
2326 return -ENOSYS;
2327 break;
2328 case 0:
2329 return cdi->options;
2330 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2331 default:
2332 if (!CDROM_CAN(arg))
2333 return -ENOSYS;
2334 }
2335 cdi->options |= (int) arg;
2336 return cdi->options;
2337 }
2338
2339 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2340 unsigned long arg)
2341 {
2342 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2343
2344 cdi->options &= ~(int) arg;
2345 return cdi->options;
2346 }
2347
2348 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2349 unsigned long arg)
2350 {
2351 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2352
2353 if (!CDROM_CAN(CDC_SELECT_SPEED))
2354 return -ENOSYS;
2355 return cdi->ops->select_speed(cdi, arg);
2356 }
2357
2358 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2359 unsigned long arg)
2360 {
2361 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2362
2363 if (!CDROM_CAN(CDC_SELECT_DISC))
2364 return -ENOSYS;
2365
2366 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2367 if ((int)arg >= cdi->capacity)
2368 return -EINVAL;
2369 }
2370
2371 /*
2372 * ->select_disc is a hook to allow a driver-specific way of
2373 * seleting disc. However, since there is no equivalent hook for
2374 * cdrom_slot_status this may not actually be useful...
2375 */
2376 if (cdi->ops->select_disc)
2377 return cdi->ops->select_disc(cdi, arg);
2378
2379 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2380 return cdrom_select_disc(cdi, arg);
2381 }
2382
2383 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2384 struct block_device *bdev)
2385 {
2386 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2387
2388 if (!capable(CAP_SYS_ADMIN))
2389 return -EACCES;
2390 if (!CDROM_CAN(CDC_RESET))
2391 return -ENOSYS;
2392 invalidate_bdev(bdev);
2393 return cdi->ops->reset(cdi);
2394 }
2395
2396 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2397 unsigned long arg)
2398 {
2399 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2400
2401 if (!CDROM_CAN(CDC_LOCK))
2402 return -EDRIVE_CANT_DO_THIS;
2403
2404 keeplocked = arg ? 1 : 0;
2405
2406 /*
2407 * Don't unlock the door on multiple opens by default, but allow
2408 * root to do so.
2409 */
2410 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2411 return -EBUSY;
2412 return cdi->ops->lock_door(cdi, arg);
2413 }
2414
2415 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2416 unsigned long arg)
2417 {
2418 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2419
2420 if (!capable(CAP_SYS_ADMIN))
2421 return -EACCES;
2422 debug = arg ? 1 : 0;
2423 return debug;
2424 }
2425
2426 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2427 {
2428 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2429 return (cdi->ops->capability & ~cdi->mask);
2430 }
2431
2432 /*
2433 * The following function is implemented, although very few audio
2434 * discs give Universal Product Code information, which should just be
2435 * the Medium Catalog Number on the box. Note, that the way the code
2436 * is written on the CD is /not/ uniform across all discs!
2437 */
2438 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2439 void __user *argp)
2440 {
2441 struct cdrom_mcn mcn;
2442 int ret;
2443
2444 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2445
2446 if (!(cdi->ops->capability & CDC_MCN))
2447 return -ENOSYS;
2448 ret = cdi->ops->get_mcn(cdi, &mcn);
2449 if (ret)
2450 return ret;
2451
2452 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2453 return -EFAULT;
2454 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2455 return 0;
2456 }
2457
2458 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2459 unsigned long arg)
2460 {
2461 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2462
2463 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2464 return -ENOSYS;
2465 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2466 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2467 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2468 if (((int)arg >= cdi->capacity))
2469 return -EINVAL;
2470 return cdrom_slot_status(cdi, arg);
2471 }
2472
2473 /*
2474 * Ok, this is where problems start. The current interface for the
2475 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2476 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2477 * is often the case, it is also very common for CDs to have some tracks
2478 * with data, and some tracks with audio. Just because I feel like it,
2479 * I declare the following to be the best way to cope. If the CD has ANY
2480 * data tracks on it, it will be returned as a data CD. If it has any XA
2481 * tracks, I will return it as that. Now I could simplify this interface
2482 * by combining these returns with the above, but this more clearly
2483 * demonstrates the problem with the current interface. Too bad this
2484 * wasn't designed to use bitmasks... -Erik
2485 *
2486 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2487 * User level programmers might feel the ioctl is not very useful.
2488 * ---david
2489 */
2490 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2491 {
2492 tracktype tracks;
2493
2494 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2495
2496 cdrom_count_tracks(cdi, &tracks);
2497 if (tracks.error)
2498 return tracks.error;
2499
2500 /* Policy mode on */
2501 if (tracks.audio > 0) {
2502 if (!tracks.data && !tracks.cdi && !tracks.xa)
2503 return CDS_AUDIO;
2504 else
2505 return CDS_MIXED;
2506 }
2507
2508 if (tracks.cdi > 0)
2509 return CDS_XA_2_2;
2510 if (tracks.xa > 0)
2511 return CDS_XA_2_1;
2512 if (tracks.data > 0)
2513 return CDS_DATA_1;
2514 /* Policy mode off */
2515
2516 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2517 return CDS_NO_INFO;
2518 }
2519
2520 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2521 {
2522 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2523 return cdi->capacity;
2524 }
2525
2526 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2527 void __user *argp)
2528 {
2529 struct cdrom_subchnl q;
2530 u8 requested, back;
2531 int ret;
2532
2533 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2534
2535 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2536 return -ENOSYS;
2537 if (copy_from_user(&q, argp, sizeof(q)))
2538 return -EFAULT;
2539
2540 requested = q.cdsc_format;
2541 if (requested != CDROM_MSF && requested != CDROM_LBA)
2542 return -EINVAL;
2543 q.cdsc_format = CDROM_MSF;
2544
2545 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2546 if (ret)
2547 return ret;
2548
2549 back = q.cdsc_format; /* local copy */
2550 sanitize_format(&q.cdsc_absaddr, &back, requested);
2551 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2552
2553 if (copy_to_user(argp, &q, sizeof(q)))
2554 return -EFAULT;
2555 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2556 return 0;
2557 }
2558
2559 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2560 void __user *argp)
2561 {
2562 struct cdrom_tochdr header;
2563 int ret;
2564
2565 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2566
2567 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2568 return -ENOSYS;
2569 if (copy_from_user(&header, argp, sizeof(header)))
2570 return -EFAULT;
2571
2572 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2573 if (ret)
2574 return ret;
2575
2576 if (copy_to_user(argp, &header, sizeof(header)))
2577 return -EFAULT;
2578 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2579 return 0;
2580 }
2581
2582 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2583 void __user *argp)
2584 {
2585 struct cdrom_tocentry entry;
2586 u8 requested_format;
2587 int ret;
2588
2589 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2590
2591 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2592 return -ENOSYS;
2593 if (copy_from_user(&entry, argp, sizeof(entry)))
2594 return -EFAULT;
2595
2596 requested_format = entry.cdte_format;
2597 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2598 return -EINVAL;
2599 /* make interface to low-level uniform */
2600 entry.cdte_format = CDROM_MSF;
2601 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2602 if (ret)
2603 return ret;
2604 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2605
2606 if (copy_to_user(argp, &entry, sizeof(entry)))
2607 return -EFAULT;
2608 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2609 return 0;
2610 }
2611
2612 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2613 void __user *argp)
2614 {
2615 struct cdrom_msf msf;
2616
2617 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2618
2619 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2620 return -ENOSYS;
2621 if (copy_from_user(&msf, argp, sizeof(msf)))
2622 return -EFAULT;
2623 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2624 }
2625
2626 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2627 void __user *argp)
2628 {
2629 struct cdrom_ti ti;
2630 int ret;
2631
2632 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2633
2634 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2635 return -ENOSYS;
2636 if (copy_from_user(&ti, argp, sizeof(ti)))
2637 return -EFAULT;
2638
2639 ret = check_for_audio_disc(cdi, cdi->ops);
2640 if (ret)
2641 return ret;
2642 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2643 }
2644 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2645 void __user *argp)
2646 {
2647 struct cdrom_volctrl volume;
2648
2649 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2650
2651 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2652 return -ENOSYS;
2653 if (copy_from_user(&volume, argp, sizeof(volume)))
2654 return -EFAULT;
2655 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2656 }
2657
2658 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2659 void __user *argp)
2660 {
2661 struct cdrom_volctrl volume;
2662 int ret;
2663
2664 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2665
2666 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2667 return -ENOSYS;
2668
2669 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2670 if (ret)
2671 return ret;
2672
2673 if (copy_to_user(argp, &volume, sizeof(volume)))
2674 return -EFAULT;
2675 return 0;
2676 }
2677
2678 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2679 unsigned int cmd)
2680 {
2681 int ret;
2682
2683 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2684
2685 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2686 return -ENOSYS;
2687 ret = check_for_audio_disc(cdi, cdi->ops);
2688 if (ret)
2689 return ret;
2690 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2691 }
2692
2693 /*
2694 * Just about every imaginable ioctl is supported in the Uniform layer
2695 * these days.
2696 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2697 */
2698 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2699 struct inode *ip, unsigned int cmd, unsigned long arg)
2700 {
2701 void __user *argp = (void __user *)arg;
2702 int ret;
2703 struct gendisk *disk = ip->i_bdev->bd_disk;
2704
2705 /*
2706 * Try the generic SCSI command ioctl's first.
2707 */
2708 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp);
2709 if (ret != -ENOTTY)
2710 return ret;
2711
2712 switch (cmd) {
2713 case CDROMMULTISESSION:
2714 return cdrom_ioctl_multisession(cdi, argp);
2715 case CDROMEJECT:
2716 return cdrom_ioctl_eject(cdi);
2717 case CDROMCLOSETRAY:
2718 return cdrom_ioctl_closetray(cdi);
2719 case CDROMEJECT_SW:
2720 return cdrom_ioctl_eject_sw(cdi, arg);
2721 case CDROM_MEDIA_CHANGED:
2722 return cdrom_ioctl_media_changed(cdi, arg);
2723 case CDROM_SET_OPTIONS:
2724 return cdrom_ioctl_set_options(cdi, arg);
2725 case CDROM_CLEAR_OPTIONS:
2726 return cdrom_ioctl_clear_options(cdi, arg);
2727 case CDROM_SELECT_SPEED:
2728 return cdrom_ioctl_select_speed(cdi, arg);
2729 case CDROM_SELECT_DISC:
2730 return cdrom_ioctl_select_disc(cdi, arg);
2731 case CDROMRESET:
2732 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2733 case CDROM_LOCKDOOR:
2734 return cdrom_ioctl_lock_door(cdi, arg);
2735 case CDROM_DEBUG:
2736 return cdrom_ioctl_debug(cdi, arg);
2737 case CDROM_GET_CAPABILITY:
2738 return cdrom_ioctl_get_capability(cdi);
2739 case CDROM_GET_MCN:
2740 return cdrom_ioctl_get_mcn(cdi, argp);
2741 case CDROM_DRIVE_STATUS:
2742 return cdrom_ioctl_drive_status(cdi, arg);
2743 case CDROM_DISC_STATUS:
2744 return cdrom_ioctl_disc_status(cdi);
2745 case CDROM_CHANGER_NSLOTS:
2746 return cdrom_ioctl_changer_nslots(cdi);
2747 }
2748
2749 /*
2750 * Use the ioctls that are implemented through the generic_packet()
2751 * interface. this may look at bit funny, but if -ENOTTY is
2752 * returned that particular ioctl is not implemented and we
2753 * let it go through the device specific ones.
2754 */
2755 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2756 ret = mmc_ioctl(cdi, cmd, arg);
2757 if (ret != -ENOTTY)
2758 return ret;
2759 }
2760
2761 /*
2762 * Note: most of the cdinfo() calls are commented out here,
2763 * because they fill up the sys log when CD players poll
2764 * the drive.
2765 */
2766 switch (cmd) {
2767 case CDROMSUBCHNL:
2768 return cdrom_ioctl_get_subchnl(cdi, argp);
2769 case CDROMREADTOCHDR:
2770 return cdrom_ioctl_read_tochdr(cdi, argp);
2771 case CDROMREADTOCENTRY:
2772 return cdrom_ioctl_read_tocentry(cdi, argp);
2773 case CDROMPLAYMSF:
2774 return cdrom_ioctl_play_msf(cdi, argp);
2775 case CDROMPLAYTRKIND:
2776 return cdrom_ioctl_play_trkind(cdi, argp);
2777 case CDROMVOLCTRL:
2778 return cdrom_ioctl_volctrl(cdi, argp);
2779 case CDROMVOLREAD:
2780 return cdrom_ioctl_volread(cdi, argp);
2781 case CDROMSTART:
2782 case CDROMSTOP:
2783 case CDROMPAUSE:
2784 case CDROMRESUME:
2785 return cdrom_ioctl_audioctl(cdi, cmd);
2786 }
2787
2788 return -ENOSYS;
2789 }
2790
2791 /*
2792 * Required when we need to use READ_10 to issue other than 2048 block
2793 * reads
2794 */
2795 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2796 {
2797 struct cdrom_device_ops *cdo = cdi->ops;
2798 struct packet_command cgc;
2799 struct modesel_head mh;
2800
2801 memset(&mh, 0, sizeof(mh));
2802 mh.block_desc_length = 0x08;
2803 mh.block_length_med = (size >> 8) & 0xff;
2804 mh.block_length_lo = size & 0xff;
2805
2806 memset(&cgc, 0, sizeof(cgc));
2807 cgc.cmd[0] = 0x15;
2808 cgc.cmd[1] = 1 << 4;
2809 cgc.cmd[4] = 12;
2810 cgc.buflen = sizeof(mh);
2811 cgc.buffer = (char *) &mh;
2812 cgc.data_direction = CGC_DATA_WRITE;
2813 mh.block_desc_length = 0x08;
2814 mh.block_length_med = (size >> 8) & 0xff;
2815 mh.block_length_lo = size & 0xff;
2816
2817 return cdo->generic_packet(cdi, &cgc);
2818 }
2819
2820 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2821 unsigned long arg)
2822 {
2823 struct cdrom_device_ops *cdo = cdi->ops;
2824 struct packet_command cgc;
2825 struct request_sense sense;
2826 unsigned char buffer[32];
2827 int ret = 0;
2828
2829 memset(&cgc, 0, sizeof(cgc));
2830
2831 /* build a unified command and queue it through
2832 cdo->generic_packet() */
2833 switch (cmd) {
2834 case CDROMREADRAW:
2835 case CDROMREADMODE1:
2836 case CDROMREADMODE2: {
2837 struct cdrom_msf msf;
2838 int blocksize = 0, format = 0, lba;
2839
2840 switch (cmd) {
2841 case CDROMREADRAW:
2842 blocksize = CD_FRAMESIZE_RAW;
2843 break;
2844 case CDROMREADMODE1:
2845 blocksize = CD_FRAMESIZE;
2846 format = 2;
2847 break;
2848 case CDROMREADMODE2:
2849 blocksize = CD_FRAMESIZE_RAW0;
2850 break;
2851 }
2852 IOCTL_IN(arg, struct cdrom_msf, msf);
2853 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2854 /* FIXME: we need upper bound checking, too!! */
2855 if (lba < 0)
2856 return -EINVAL;
2857 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
2858 if (cgc.buffer == NULL)
2859 return -ENOMEM;
2860 memset(&sense, 0, sizeof(sense));
2861 cgc.sense = &sense;
2862 cgc.data_direction = CGC_DATA_READ;
2863 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2864 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2865 /*
2866 * SCSI-II devices are not required to support
2867 * READ_CD, so let's try switching block size
2868 */
2869 /* FIXME: switch back again... */
2870 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2871 kfree(cgc.buffer);
2872 return ret;
2873 }
2874 cgc.sense = NULL;
2875 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2876 ret |= cdrom_switch_blocksize(cdi, blocksize);
2877 }
2878 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2879 ret = -EFAULT;
2880 kfree(cgc.buffer);
2881 return ret;
2882 }
2883 case CDROMREADAUDIO: {
2884 struct cdrom_read_audio ra;
2885 int lba;
2886
2887 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2888
2889 if (ra.addr_format == CDROM_MSF)
2890 lba = msf_to_lba(ra.addr.msf.minute,
2891 ra.addr.msf.second,
2892 ra.addr.msf.frame);
2893 else if (ra.addr_format == CDROM_LBA)
2894 lba = ra.addr.lba;
2895 else
2896 return -EINVAL;
2897
2898 /* FIXME: we need upper bound checking, too!! */
2899 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2900 return -EINVAL;
2901
2902 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2903 }
2904 case CDROMSUBCHNL: {
2905 struct cdrom_subchnl q;
2906 u_char requested, back;
2907 IOCTL_IN(arg, struct cdrom_subchnl, q);
2908 requested = q.cdsc_format;
2909 if (!((requested == CDROM_MSF) ||
2910 (requested == CDROM_LBA)))
2911 return -EINVAL;
2912 q.cdsc_format = CDROM_MSF;
2913 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2914 return ret;
2915 back = q.cdsc_format; /* local copy */
2916 sanitize_format(&q.cdsc_absaddr, &back, requested);
2917 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2918 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2919 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2920 return 0;
2921 }
2922 case CDROMPLAYMSF: {
2923 struct cdrom_msf msf;
2924 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2925 IOCTL_IN(arg, struct cdrom_msf, msf);
2926 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2927 cgc.cmd[3] = msf.cdmsf_min0;
2928 cgc.cmd[4] = msf.cdmsf_sec0;
2929 cgc.cmd[5] = msf.cdmsf_frame0;
2930 cgc.cmd[6] = msf.cdmsf_min1;
2931 cgc.cmd[7] = msf.cdmsf_sec1;
2932 cgc.cmd[8] = msf.cdmsf_frame1;
2933 cgc.data_direction = CGC_DATA_NONE;
2934 return cdo->generic_packet(cdi, &cgc);
2935 }
2936 case CDROMPLAYBLK: {
2937 struct cdrom_blk blk;
2938 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2939 IOCTL_IN(arg, struct cdrom_blk, blk);
2940 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2941 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2942 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2943 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2944 cgc.cmd[5] = blk.from & 0xff;
2945 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2946 cgc.cmd[8] = blk.len & 0xff;
2947 cgc.data_direction = CGC_DATA_NONE;
2948 return cdo->generic_packet(cdi, &cgc);
2949 }
2950 case CDROMVOLCTRL:
2951 case CDROMVOLREAD: {
2952 struct cdrom_volctrl volctrl;
2953 char mask[sizeof(buffer)];
2954 unsigned short offset;
2955
2956 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2957
2958 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2959
2960 cgc.buffer = buffer;
2961 cgc.buflen = 24;
2962 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2963 return ret;
2964
2965 /* originally the code depended on buffer[1] to determine
2966 how much data is available for transfer. buffer[1] is
2967 unfortunately ambigious and the only reliable way seem
2968 to be to simply skip over the block descriptor... */
2969 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
2970
2971 if (offset + 16 > sizeof(buffer))
2972 return -E2BIG;
2973
2974 if (offset + 16 > cgc.buflen) {
2975 cgc.buflen = offset+16;
2976 ret = cdrom_mode_sense(cdi, &cgc,
2977 GPMODE_AUDIO_CTL_PAGE, 0);
2978 if (ret)
2979 return ret;
2980 }
2981
2982 /* sanity check */
2983 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2984 buffer[offset+1] < 14)
2985 return -EINVAL;
2986
2987 /* now we have the current volume settings. if it was only
2988 a CDROMVOLREAD, return these values */
2989 if (cmd == CDROMVOLREAD) {
2990 volctrl.channel0 = buffer[offset+9];
2991 volctrl.channel1 = buffer[offset+11];
2992 volctrl.channel2 = buffer[offset+13];
2993 volctrl.channel3 = buffer[offset+15];
2994 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2995 return 0;
2996 }
2997
2998 /* get the volume mask */
2999 cgc.buffer = mask;
3000 if ((ret = cdrom_mode_sense(cdi, &cgc,
3001 GPMODE_AUDIO_CTL_PAGE, 1)))
3002 return ret;
3003
3004 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
3005 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
3006 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
3007 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
3008
3009 /* set volume */
3010 cgc.buffer = buffer + offset - 8;
3011 memset(cgc.buffer, 0, 8);
3012 return cdrom_mode_select(cdi, &cgc);
3013 }
3014
3015 case CDROMSTART:
3016 case CDROMSTOP: {
3017 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3018 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
3019 cgc.cmd[1] = 1;
3020 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3021 cgc.data_direction = CGC_DATA_NONE;
3022 return cdo->generic_packet(cdi, &cgc);
3023 }
3024
3025 case CDROMPAUSE:
3026 case CDROMRESUME: {
3027 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3028 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3029 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3030 cgc.data_direction = CGC_DATA_NONE;
3031 return cdo->generic_packet(cdi, &cgc);
3032 }
3033
3034 case DVD_READ_STRUCT: {
3035 dvd_struct *s;
3036 int size = sizeof(dvd_struct);
3037 if (!CDROM_CAN(CDC_DVD))
3038 return -ENOSYS;
3039 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
3040 return -ENOMEM;
3041 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3042 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3043 kfree(s);
3044 return -EFAULT;
3045 }
3046 if ((ret = dvd_read_struct(cdi, s))) {
3047 kfree(s);
3048 return ret;
3049 }
3050 if (copy_to_user((dvd_struct __user *)arg, s, size))
3051 ret = -EFAULT;
3052 kfree(s);
3053 return ret;
3054 }
3055
3056 case DVD_AUTH: {
3057 dvd_authinfo ai;
3058 if (!CDROM_CAN(CDC_DVD))
3059 return -ENOSYS;
3060 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3061 IOCTL_IN(arg, dvd_authinfo, ai);
3062 if ((ret = dvd_do_auth (cdi, &ai)))
3063 return ret;
3064 IOCTL_OUT(arg, dvd_authinfo, ai);
3065 return 0;
3066 }
3067
3068 case CDROM_NEXT_WRITABLE: {
3069 long next = 0;
3070 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3071 if ((ret = cdrom_get_next_writable(cdi, &next)))
3072 return ret;
3073 IOCTL_OUT(arg, long, next);
3074 return 0;
3075 }
3076 case CDROM_LAST_WRITTEN: {
3077 long last = 0;
3078 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3079 if ((ret = cdrom_get_last_written(cdi, &last)))
3080 return ret;
3081 IOCTL_OUT(arg, long, last);
3082 return 0;
3083 }
3084 } /* switch */
3085
3086 return -ENOTTY;
3087 }
3088
3089 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3090 track_information *ti)
3091 {
3092 struct cdrom_device_ops *cdo = cdi->ops;
3093 struct packet_command cgc;
3094 int ret, buflen;
3095
3096 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3097 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3098 cgc.cmd[1] = type & 3;
3099 cgc.cmd[4] = (track & 0xff00) >> 8;
3100 cgc.cmd[5] = track & 0xff;
3101 cgc.cmd[8] = 8;
3102 cgc.quiet = 1;
3103
3104 if ((ret = cdo->generic_packet(cdi, &cgc)))
3105 return ret;
3106
3107 buflen = be16_to_cpu(ti->track_information_length) +
3108 sizeof(ti->track_information_length);
3109
3110 if (buflen > sizeof(track_information))
3111 buflen = sizeof(track_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 /* requires CD R/RW */
3122 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3123 {
3124 struct cdrom_device_ops *cdo = cdi->ops;
3125 struct packet_command cgc;
3126 int ret, buflen;
3127
3128 /* set up command and get the disc info */
3129 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3130 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3131 cgc.cmd[8] = cgc.buflen = 2;
3132 cgc.quiet = 1;
3133
3134 if ((ret = cdo->generic_packet(cdi, &cgc)))
3135 return ret;
3136
3137 /* not all drives have the same disc_info length, so requeue
3138 * packet with the length the drive tells us it can supply
3139 */
3140 buflen = be16_to_cpu(di->disc_information_length) +
3141 sizeof(di->disc_information_length);
3142
3143 if (buflen > sizeof(disc_information))
3144 buflen = sizeof(disc_information);
3145
3146 cgc.cmd[8] = cgc.buflen = buflen;
3147 if ((ret = cdo->generic_packet(cdi, &cgc)))
3148 return ret;
3149
3150 /* return actual fill size */
3151 return buflen;
3152 }
3153
3154 /* return the last written block on the CD-R media. this is for the udf
3155 file system. */
3156 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3157 {
3158 struct cdrom_tocentry toc;
3159 disc_information di;
3160 track_information ti;
3161 __u32 last_track;
3162 int ret = -1, ti_size;
3163
3164 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3165 goto use_toc;
3166
3167 ret = cdrom_get_disc_info(cdi, &di);
3168 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3169 + sizeof(di.last_track_lsb)))
3170 goto use_toc;
3171
3172 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3173 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3174 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3175 if (ti_size < (int)offsetof(typeof(ti), track_start))
3176 goto use_toc;
3177
3178 /* if this track is blank, try the previous. */
3179 if (ti.blank) {
3180 if (last_track==1)
3181 goto use_toc;
3182 last_track--;
3183 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3184 }
3185
3186 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3187 + sizeof(ti.track_size)))
3188 goto use_toc;
3189
3190 /* if last recorded field is valid, return it. */
3191 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3192 + sizeof(ti.last_rec_address))) {
3193 *last_written = be32_to_cpu(ti.last_rec_address);
3194 } else {
3195 /* make it up instead */
3196 *last_written = be32_to_cpu(ti.track_start) +
3197 be32_to_cpu(ti.track_size);
3198 if (ti.free_blocks)
3199 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3200 }
3201 return 0;
3202
3203 /* this is where we end up if the drive either can't do a
3204 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3205 it doesn't give enough information or fails. then we return
3206 the toc contents. */
3207 use_toc:
3208 toc.cdte_format = CDROM_MSF;
3209 toc.cdte_track = CDROM_LEADOUT;
3210 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3211 return ret;
3212 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3213 *last_written = toc.cdte_addr.lba;
3214 return 0;
3215 }
3216
3217 /* return the next writable block. also for udf file system. */
3218 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3219 {
3220 disc_information di;
3221 track_information ti;
3222 __u16 last_track;
3223 int ret, ti_size;
3224
3225 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3226 goto use_last_written;
3227
3228 ret = cdrom_get_disc_info(cdi, &di);
3229 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3230 + sizeof(di.last_track_lsb))
3231 goto use_last_written;
3232
3233 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3234 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3235 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3236 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3237 goto use_last_written;
3238
3239 /* if this track is blank, try the previous. */
3240 if (ti.blank) {
3241 if (last_track == 1)
3242 goto use_last_written;
3243 last_track--;
3244 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3245 if (ti_size < 0)
3246 goto use_last_written;
3247 }
3248
3249 /* if next recordable address field is valid, use it. */
3250 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3251 + sizeof(ti.next_writable)) {
3252 *next_writable = be32_to_cpu(ti.next_writable);
3253 return 0;
3254 }
3255
3256 use_last_written:
3257 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3258 *next_writable = 0;
3259 return ret;
3260 } else {
3261 *next_writable += 7;
3262 return 0;
3263 }
3264 }
3265
3266 EXPORT_SYMBOL(cdrom_get_last_written);
3267 EXPORT_SYMBOL(register_cdrom);
3268 EXPORT_SYMBOL(unregister_cdrom);
3269 EXPORT_SYMBOL(cdrom_open);
3270 EXPORT_SYMBOL(cdrom_release);
3271 EXPORT_SYMBOL(cdrom_ioctl);
3272 EXPORT_SYMBOL(cdrom_media_changed);
3273 EXPORT_SYMBOL(cdrom_number_of_slots);
3274 EXPORT_SYMBOL(cdrom_mode_select);
3275 EXPORT_SYMBOL(cdrom_mode_sense);
3276 EXPORT_SYMBOL(init_cdrom_command);
3277 EXPORT_SYMBOL(cdrom_get_media_event);
3278
3279 #ifdef CONFIG_SYSCTL
3280
3281 #define CDROM_STR_SIZE 1000
3282
3283 static struct cdrom_sysctl_settings {
3284 char info[CDROM_STR_SIZE]; /* general info */
3285 int autoclose; /* close tray upon mount, etc */
3286 int autoeject; /* eject on umount */
3287 int debug; /* turn on debugging messages */
3288 int lock; /* lock the door on device open */
3289 int check; /* check media type */
3290 } cdrom_sysctl_settings;
3291
3292 enum cdrom_print_option {
3293 CTL_NAME,
3294 CTL_SPEED,
3295 CTL_SLOTS,
3296 CTL_CAPABILITY
3297 };
3298
3299 static int cdrom_print_info(const char *header, int val, char *info,
3300 int *pos, enum cdrom_print_option option)
3301 {
3302 const int max_size = sizeof(cdrom_sysctl_settings.info);
3303 struct cdrom_device_info *cdi;
3304 int ret;
3305
3306 ret = scnprintf(info + *pos, max_size - *pos, header);
3307 if (!ret)
3308 return 1;
3309
3310 *pos += ret;
3311
3312 for (cdi = topCdromPtr; cdi; cdi = cdi->next) {
3313 switch (option) {
3314 case CTL_NAME:
3315 ret = scnprintf(info + *pos, max_size - *pos,
3316 "\t%s", cdi->name);
3317 break;
3318 case CTL_SPEED:
3319 ret = scnprintf(info + *pos, max_size - *pos,
3320 "\t%d", cdi->speed);
3321 break;
3322 case CTL_SLOTS:
3323 ret = scnprintf(info + *pos, max_size - *pos,
3324 "\t%d", cdi->capacity);
3325 break;
3326 case CTL_CAPABILITY:
3327 ret = scnprintf(info + *pos, max_size - *pos,
3328 "\t%d", CDROM_CAN(val) != 0);
3329 break;
3330 default:
3331 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3332 return 1;
3333 }
3334 if (!ret)
3335 return 1;
3336 *pos += ret;
3337 }
3338
3339 return 0;
3340 }
3341
3342 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3343 void __user *buffer, size_t *lenp, loff_t *ppos)
3344 {
3345 int pos;
3346 char *info = cdrom_sysctl_settings.info;
3347 const int max_size = sizeof(cdrom_sysctl_settings.info);
3348
3349 if (!*lenp || (*ppos && !write)) {
3350 *lenp = 0;
3351 return 0;
3352 }
3353
3354 mutex_lock(&cdrom_mutex);
3355
3356 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3357
3358 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3359 goto done;
3360 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3361 goto done;
3362 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3363 goto done;
3364 if (cdrom_print_info("\nCan close tray:\t",
3365 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3366 goto done;
3367 if (cdrom_print_info("\nCan open tray:\t",
3368 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3369 goto done;
3370 if (cdrom_print_info("\nCan lock tray:\t",
3371 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3372 goto done;
3373 if (cdrom_print_info("\nCan change speed:",
3374 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3375 goto done;
3376 if (cdrom_print_info("\nCan select disk:",
3377 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3378 goto done;
3379 if (cdrom_print_info("\nCan read multisession:",
3380 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3381 goto done;
3382 if (cdrom_print_info("\nCan read MCN:\t",
3383 CDC_MCN, info, &pos, CTL_CAPABILITY))
3384 goto done;
3385 if (cdrom_print_info("\nReports media changed:",
3386 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3387 goto done;
3388 if (cdrom_print_info("\nCan play audio:\t",
3389 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3390 goto done;
3391 if (cdrom_print_info("\nCan write CD-R:\t",
3392 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3393 goto done;
3394 if (cdrom_print_info("\nCan write CD-RW:",
3395 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3396 goto done;
3397 if (cdrom_print_info("\nCan read DVD:\t",
3398 CDC_DVD, info, &pos, CTL_CAPABILITY))
3399 goto done;
3400 if (cdrom_print_info("\nCan write DVD-R:",
3401 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3402 goto done;
3403 if (cdrom_print_info("\nCan write DVD-RAM:",
3404 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3405 goto done;
3406 if (cdrom_print_info("\nCan read MRW:\t",
3407 CDC_MRW, info, &pos, CTL_CAPABILITY))
3408 goto done;
3409 if (cdrom_print_info("\nCan write MRW:\t",
3410 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3411 goto done;
3412 if (cdrom_print_info("\nCan write RAM:\t",
3413 CDC_RAM, info, &pos, CTL_CAPABILITY))
3414 goto done;
3415 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3416 goto done;
3417 doit:
3418 mutex_unlock(&cdrom_mutex);
3419 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3420 done:
3421 printk(KERN_INFO "cdrom: info buffer too small\n");
3422 goto doit;
3423 }
3424
3425 /* Unfortunately, per device settings are not implemented through
3426 procfs/sysctl yet. When they are, this will naturally disappear. For now
3427 just update all drives. Later this will become the template on which
3428 new registered drives will be based. */
3429 static void cdrom_update_settings(void)
3430 {
3431 struct cdrom_device_info *cdi;
3432
3433 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
3434 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3435 cdi->options |= CDO_AUTO_CLOSE;
3436 else if (!autoclose)
3437 cdi->options &= ~CDO_AUTO_CLOSE;
3438 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3439 cdi->options |= CDO_AUTO_EJECT;
3440 else if (!autoeject)
3441 cdi->options &= ~CDO_AUTO_EJECT;
3442 if (lockdoor && CDROM_CAN(CDC_LOCK))
3443 cdi->options |= CDO_LOCK;
3444 else if (!lockdoor)
3445 cdi->options &= ~CDO_LOCK;
3446 if (check_media_type)
3447 cdi->options |= CDO_CHECK_TYPE;
3448 else
3449 cdi->options &= ~CDO_CHECK_TYPE;
3450 }
3451 }
3452
3453 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3454 void __user *buffer, size_t *lenp, loff_t *ppos)
3455 {
3456 int ret;
3457
3458 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3459
3460 if (write) {
3461
3462 /* we only care for 1 or 0. */
3463 autoclose = !!cdrom_sysctl_settings.autoclose;
3464 autoeject = !!cdrom_sysctl_settings.autoeject;
3465 debug = !!cdrom_sysctl_settings.debug;
3466 lockdoor = !!cdrom_sysctl_settings.lock;
3467 check_media_type = !!cdrom_sysctl_settings.check;
3468
3469 /* update the option flags according to the changes. we
3470 don't have per device options through sysctl yet,
3471 but we will have and then this will disappear. */
3472 cdrom_update_settings();
3473 }
3474
3475 return ret;
3476 }
3477
3478 /* Place files in /proc/sys/dev/cdrom */
3479 static ctl_table cdrom_table[] = {
3480 {
3481 .procname = "info",
3482 .data = &cdrom_sysctl_settings.info,
3483 .maxlen = CDROM_STR_SIZE,
3484 .mode = 0444,
3485 .proc_handler = &cdrom_sysctl_info,
3486 },
3487 {
3488 .procname = "autoclose",
3489 .data = &cdrom_sysctl_settings.autoclose,
3490 .maxlen = sizeof(int),
3491 .mode = 0644,
3492 .proc_handler = &cdrom_sysctl_handler,
3493 },
3494 {
3495 .procname = "autoeject",
3496 .data = &cdrom_sysctl_settings.autoeject,
3497 .maxlen = sizeof(int),
3498 .mode = 0644,
3499 .proc_handler = &cdrom_sysctl_handler,
3500 },
3501 {
3502 .procname = "debug",
3503 .data = &cdrom_sysctl_settings.debug,
3504 .maxlen = sizeof(int),
3505 .mode = 0644,
3506 .proc_handler = &cdrom_sysctl_handler,
3507 },
3508 {
3509 .procname = "lock",
3510 .data = &cdrom_sysctl_settings.lock,
3511 .maxlen = sizeof(int),
3512 .mode = 0644,
3513 .proc_handler = &cdrom_sysctl_handler,
3514 },
3515 {
3516 .procname = "check_media",
3517 .data = &cdrom_sysctl_settings.check,
3518 .maxlen = sizeof(int),
3519 .mode = 0644,
3520 .proc_handler = &cdrom_sysctl_handler
3521 },
3522 { .ctl_name = 0 }
3523 };
3524
3525 static ctl_table cdrom_cdrom_table[] = {
3526 {
3527 .ctl_name = DEV_CDROM,
3528 .procname = "cdrom",
3529 .maxlen = 0,
3530 .mode = 0555,
3531 .child = cdrom_table,
3532 },
3533 { .ctl_name = 0 }
3534 };
3535
3536 /* Make sure that /proc/sys/dev is there */
3537 static ctl_table cdrom_root_table[] = {
3538 {
3539 .ctl_name = CTL_DEV,
3540 .procname = "dev",
3541 .maxlen = 0,
3542 .mode = 0555,
3543 .child = cdrom_cdrom_table,
3544 },
3545 { .ctl_name = 0 }
3546 };
3547 static struct ctl_table_header *cdrom_sysctl_header;
3548
3549 static void cdrom_sysctl_register(void)
3550 {
3551 static int initialized;
3552
3553 if (initialized == 1)
3554 return;
3555
3556 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3557
3558 /* set the defaults */
3559 cdrom_sysctl_settings.autoclose = autoclose;
3560 cdrom_sysctl_settings.autoeject = autoeject;
3561 cdrom_sysctl_settings.debug = debug;
3562 cdrom_sysctl_settings.lock = lockdoor;
3563 cdrom_sysctl_settings.check = check_media_type;
3564
3565 initialized = 1;
3566 }
3567
3568 static void cdrom_sysctl_unregister(void)
3569 {
3570 if (cdrom_sysctl_header)
3571 unregister_sysctl_table(cdrom_sysctl_header);
3572 }
3573
3574 #endif /* CONFIG_SYSCTL */
3575
3576 static int __init cdrom_init(void)
3577 {
3578 #ifdef CONFIG_SYSCTL
3579 cdrom_sysctl_register();
3580 #endif
3581 return 0;
3582 }
3583
3584 static void __exit cdrom_exit(void)
3585 {
3586 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3587 #ifdef CONFIG_SYSCTL
3588 cdrom_sysctl_unregister();
3589 #endif
3590 }
3591
3592 module_init(cdrom_init);
3593 module_exit(cdrom_exit);
3594 MODULE_LICENSE("GPL");
WRT350N Kernel Patches