projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
cdrom: protect cdrom_device_info list by mutex
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / cdrom / cdrom.c
CommitLineData
f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 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
322.00 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
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 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
702.13 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
852.50 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
1da177e4
LT		 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 */
287static int debug;
288/* used to keep tray locked at all times */
289static int keeplocked;
290/* default compatibility mode */
291static int autoclose=1;
292static int autoeject;
293static int lockdoor = 1;
294/* will we ever get to use this... sigh. */
295static int check_media_type;
296/* automatically restart mrw format */
297static int mrw_format_restart = 1;
298module_param(debug, bool, 0);
299module_param(autoclose, bool, 0);
300module_param(autoeject, bool, 0);
301module_param(lockdoor, bool, 0);
302module_param(check_media_type, bool, 0);
303module_param(mrw_format_restart, bool, 0);
304
554988d6 305static DEFINE_MUTEX(cdrom_mutex);
1da177e4
LT		 306
307static const char *mrw_format_status[] = {
308 "not mrw",
309 "bgformat inactive",
310 "bgformat active",
311 "mrw complete",
312};
313
314static 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
2e11c207
JA		 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
1da177e4
LT		 346/* Not-exported routines. */
347static int open_for_data(struct cdrom_device_info * cdi);
348static int check_for_audio_disc(struct cdrom_device_info * cdi,
349 struct cdrom_device_ops * cdo);
350static void sanitize_format(union cdrom_addr *addr,
351 u_char * curr, u_char requested);
352static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
353 unsigned long arg);
354
355int cdrom_get_last_written(struct cdrom_device_info *, long *);
356static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
357static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
358
359static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
360
361static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
362
1da177e4 363static void cdrom_sysctl_register(void);
17672cf0 364
1da177e4
LT		 365static struct cdrom_device_info *topCdromPtr;
366
367static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
368 struct packet_command *cgc)
369{
370 if (cgc->sense) {
371 cgc->sense->sense_key = 0x05;
372 cgc->sense->asc = 0x20;
373 cgc->sense->ascq = 0x00;
374 }
375
376 cgc->stat = -EIO;
377 return -EIO;
378}
379
380/* This macro makes sure we don't have to check on cdrom_device_ops
381 * existence in the run-time routines below. Change_capability is a
382 * hack to have the capability flags defined const, while we can still
383 * change it here without gcc complaining at every line.
384 */
385#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
386
387int register_cdrom(struct cdrom_device_info *cdi)
388{
389 static char banner_printed;
390 struct cdrom_device_ops *cdo = cdi->ops;
391 int *change_capability = (int *)&cdo->capability; /* hack */
392
393 cdinfo(CD_OPEN, "entering register_cdrom\n");
394
395 if (cdo->open == NULL || cdo->release == NULL)
3c3f4e01 396 return -EINVAL;
1da177e4
LT		 397 if (!banner_printed) {
398 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
399 banner_printed = 1;
1da177e4 400 cdrom_sysctl_register();
1da177e4
LT		 401 }
402
403 ENSURE(drive_status, CDC_DRIVE_STATUS );
404 ENSURE(media_changed, CDC_MEDIA_CHANGED);
405 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
406 ENSURE(lock_door, CDC_LOCK);
407 ENSURE(select_speed, CDC_SELECT_SPEED);
408 ENSURE(get_last_session, CDC_MULTI_SESSION);
409 ENSURE(get_mcn, CDC_MCN);
410 ENSURE(reset, CDC_RESET);
411 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
1da177e4
LT		 412 ENSURE(generic_packet, CDC_GENERIC_PACKET);
413 cdi->mc_flags = 0;
414 cdo->n_minors = 0;
415 cdi->options = CDO_USE_FFLAGS;
416
417 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
418 cdi->options |= (int) CDO_AUTO_CLOSE;
419 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
420 cdi->options |= (int) CDO_AUTO_EJECT;
421 if (lockdoor==1)
422 cdi->options |= (int) CDO_LOCK;
423 if (check_media_type==1)
424 cdi->options |= (int) CDO_CHECK_TYPE;
425
426 if (CDROM_CAN(CDC_MRW_W))
427 cdi->exit = cdrom_mrw_exit;
428
429 if (cdi->disk)
430 cdi->cdda_method = CDDA_BPC_FULL;
431 else
432 cdi->cdda_method = CDDA_OLD;
433
434 if (!cdo->generic_packet)
435 cdo->generic_packet = cdrom_dummy_generic_packet;
436
437 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
554988d6 438 mutex_lock(&cdrom_mutex);
1da177e4
LT		 439 cdi->next = topCdromPtr;
440 topCdromPtr = cdi;
554988d6 441 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 442 return 0;
443}
444#undef ENSURE
445
446int unregister_cdrom(struct cdrom_device_info *unreg)
447{
448 struct cdrom_device_info *cdi, *prev;
449 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
450
451 prev = NULL;
554988d6 452 mutex_lock(&cdrom_mutex);
1da177e4
LT		 453 cdi = topCdromPtr;
454 while (cdi && cdi != unreg) {
455 prev = cdi;
456 cdi = cdi->next;
457 }
458
459 if (cdi == NULL) {
554988d6 460 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 461 return -2;
462 }
463 if (prev)
464 prev->next = cdi->next;
465 else
466 topCdromPtr = cdi->next;
467
554988d6 468 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 469
470 if (cdi->exit)
471 cdi->exit(cdi);
472
473 cdi->ops->n_minors--;
474 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
475 return 0;
476}
477
478int cdrom_get_media_event(struct cdrom_device_info *cdi,
479 struct media_event_desc *med)
480{
481 struct packet_command cgc;
482 unsigned char buffer[8];
483 struct event_header *eh = (struct event_header *) buffer;
484
485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
486 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
487 cgc.cmd[1] = 1; /* IMMED */
488 cgc.cmd[4] = 1 << 4; /* media event */
489 cgc.cmd[8] = sizeof(buffer);
490 cgc.quiet = 1;
491
492 if (cdi->ops->generic_packet(cdi, &cgc))
493 return 1;
494
495 if (be16_to_cpu(eh->data_len) < sizeof(*med))
496 return 1;
497
498 if (eh->nea || eh->notification_class != 0x4)
499 return 1;
500
501 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
502 return 0;
503}
504
505/*
506 * the first prototypes used 0x2c as the page code for the mrw mode page,
507 * subsequently this was changed to 0x03. probe the one used by this drive
508 */
509static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
510{
511 struct packet_command cgc;
512 char buffer[16];
513
514 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
515
516 cgc.timeout = HZ;
517 cgc.quiet = 1;
518
519 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
520 cdi->mrw_mode_page = MRW_MODE_PC;
521 return 0;
522 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
523 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
524 return 0;
525 }
526
527 return 1;
528}
529
530static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
531{
532 struct packet_command cgc;
533 struct mrw_feature_desc *mfd;
534 unsigned char buffer[16];
535 int ret;
536
537 *write = 0;
538
539 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
540
541 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
542 cgc.cmd[3] = CDF_MRW;
543 cgc.cmd[8] = sizeof(buffer);
544 cgc.quiet = 1;
545
546 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
547 return ret;
548
549 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
550 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
551 return 1;
552 *write = mfd->write;
553
554 if ((ret = cdrom_mrw_probe_pc(cdi))) {
555 *write = 0;
556 return ret;
557 }
558
559 return 0;
560}
561
562static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
563{
564 struct packet_command cgc;
565 unsigned char buffer[12];
566 int ret;
567
568 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
569
570 /*
571 * FmtData bit set (bit 4), format type is 1
572 */
573 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
574 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
575 cgc.cmd[1] = (1 << 4) | 1;
576
577 cgc.timeout = 5 * 60 * HZ;
578
579 /*
580 * 4 byte format list header, 8 byte format list descriptor
581 */
582 buffer[1] = 1 << 1;
583 buffer[3] = 8;
584
585 /*
586 * nr_blocks field
587 */
588 buffer[4] = 0xff;
589 buffer[5] = 0xff;
590 buffer[6] = 0xff;
591 buffer[7] = 0xff;
592
593 buffer[8] = 0x24 << 2;
594 buffer[11] = cont;
595
596 ret = cdi->ops->generic_packet(cdi, &cgc);
597 if (ret)
598 printk(KERN_INFO "cdrom: bgformat failed\n");
599
600 return ret;
601}
602
603static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
604{
605 struct packet_command cgc;
606
607 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
608 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
609
610 /*
611 * Session = 1, Track = 0
612 */
613 cgc.cmd[1] = !!immed;
614 cgc.cmd[2] = 1 << 1;
615
616 cgc.timeout = 5 * 60 * HZ;
617
618 return cdi->ops->generic_packet(cdi, &cgc);
619}
620
621static int cdrom_flush_cache(struct cdrom_device_info *cdi)
622{
623 struct packet_command cgc;
624
625 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
626 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
627
628 cgc.timeout = 5 * 60 * HZ;
629
630 return cdi->ops->generic_packet(cdi, &cgc);
631}
632
633static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
634{
635 disc_information di;
636 int ret;
637
638 ret = cdrom_get_disc_info(cdi, &di);
639 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
640 return 1;
641
642 ret = 0;
643 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
644 printk(KERN_INFO "cdrom: issuing MRW back ground "
645 "format suspend\n");
646 ret = cdrom_mrw_bgformat_susp(cdi, 0);
647 }
648
7da21a02 649 if (!ret && cdi->media_written)
1da177e4
LT		 650 ret = cdrom_flush_cache(cdi);
651
652 return ret;
653}
654
655static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
656{
657 struct packet_command cgc;
658 struct mode_page_header *mph;
659 char buffer[16];
660 int ret, offset, size;
661
662 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
663
664 cgc.buffer = buffer;
665 cgc.buflen = sizeof(buffer);
666
667 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
668 return ret;
669
670 mph = (struct mode_page_header *) buffer;
671 offset = be16_to_cpu(mph->desc_length);
672 size = be16_to_cpu(mph->mode_data_length) + 2;
673
674 buffer[offset + 3] = space;
675 cgc.buflen = size;
676
677 if ((ret = cdrom_mode_select(cdi, &cgc)))
678 return ret;
679
680 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
681 return 0;
682}
683
684static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
686{
687 struct packet_command cgc;
688 char buffer[24];
689 int ret;
690
691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
692
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
696 cgc.quiet = 1;
697
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
699 return ret;
700
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
702 return 0;
703}
704
705static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
706{
707 struct packet_command cgc;
708 char buffer[16];
56052d52 709 __be16 *feature_code;
1da177e4
LT		 710 int ret;
711
712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
713
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
716 cgc.cmd[8] = sizeof(buffer);
717 cgc.quiet = 1;
718
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
720 return ret;
721
56052d52 722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4
LT		 723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
724 return 0;
725
726 return 1;
727}
728
729
730static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
731{
732 struct rwrt_feature_desc rfd;
733 int ret;
734
735 *write = 0;
736
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
738 return ret;
739
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
741 *write = 1;
742
743 return 0;
744}
745
746static int cdrom_media_erasable(struct cdrom_device_info *cdi)
747{
748 disc_information di;
749 int ret;
750
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
753 return -1;
754
755 return di.erasable;
756}
757
758/*
759 * FIXME: check RO bit
760 */
761static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
762{
763 int ret = cdrom_media_erasable(cdi);
764
765 /*
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
768 */
769 if (!ret)
770 return 1;
771
772 return 0;
773}
774
775static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
776{
777 disc_information di;
778 int ret;
779
780 /*
781 * always reset to DMA lba space on open
782 */
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
784 printk(KERN_ERR "cdrom: failed setting lba address space\n");
785 return 1;
786 }
787
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
790 return 1;
791
792 if (!di.erasable)
793 return 1;
794
795 /*
796 * mrw_status
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
801 */
802 ret = 0;
803 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
804 mrw_format_status[di.mrw_status]);
805 if (!di.mrw_status)
806 ret = 1;
807 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
808 mrw_format_restart)
809 ret = cdrom_mrw_bgformat(cdi, 1);
810
811 return ret;
812}
813
814static int mo_open_write(struct cdrom_device_info *cdi)
815{
816 struct packet_command cgc;
817 char buffer[255];
818 int ret;
819
820 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
821 cgc.quiet = 1;
822
823 /*
824 * obtain write protect information as per
825 * drivers/scsi/sd.c:sd_read_write_protect_flag
826 */
827
828 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
829 if (ret)
830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
831 if (ret) {
832 cgc.buflen = 255;
833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
834 }
835
836 /* drive gave us no info, let the user go ahead */
837 if (ret)
838 return 0;
839
840 return buffer[3] & 0x80;
841}
842
843static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
844{
845 struct rwrt_feature_desc rfd;
846 int ret;
847
848 if ((ret = cdrom_has_defect_mgt(cdi)))
849 return ret;
850
851 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
852 return ret;
853 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
854 ret = !rfd.curr;
855
856 cdinfo(CD_OPEN, "can open for random write\n");
857 return ret;
858}
859
860static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
861{
862 struct packet_command cgc;
863 char buffer[32];
864 int ret, mmc3_profile;
865
866 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
867
868 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
869 cgc.cmd[1] = 0;
870 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
871 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
872 cgc.quiet = 1;
873
874 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
875 mmc3_profile = 0xffff;
876 else
877 mmc3_profile = (buffer[6] << 8) | buffer[7];
878
879 cdi->mmc3_profile = mmc3_profile;
880}
881
882static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
883{
884 switch (cdi->mmc3_profile) {
885 case 0x12: /* DVD-RAM */
886 case 0x1A: /* DVD+RW */
887 return 0;
888 default:
889 return 1;
890 }
891}
892
893/*
894 * returns 0 for ok to open write, non-0 to disallow
895 */
896static int cdrom_open_write(struct cdrom_device_info *cdi)
897{
898 int mrw, mrw_write, ram_write;
899 int ret = 1;
900
901 mrw = 0;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
903 mrw = 1;
904
905 if (CDROM_CAN(CDC_MO_DRIVE))
906 ram_write = 1;
907 else
908 (void) cdrom_is_random_writable(cdi, &ram_write);
909
910 if (mrw)
911 cdi->mask &= ~CDC_MRW;
912 else
913 cdi->mask |= CDC_MRW;
914
915 if (mrw_write)
916 cdi->mask &= ~CDC_MRW_W;
917 else
918 cdi->mask |= CDC_MRW_W;
919
920 if (ram_write)
921 cdi->mask &= ~CDC_RAM;
922 else
923 cdi->mask |= CDC_RAM;
924
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
935 ret = 0;
936
937 return ret;
938}
939
940static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
941{
942 struct packet_command cgc;
943
944 if (cdi->mmc3_profile != 0x1a) {
945 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
946 return;
947 }
948
949 if (!cdi->media_written) {
950 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
951 return;
952 }
953
954 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
955 cdi->name);
956
957 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
958 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
959 cgc.timeout = 30*HZ;
960 cdi->ops->generic_packet(cdi, &cgc);
961
962 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
963 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
964 cgc.timeout = 3000*HZ;
965 cgc.quiet = 1;
966 cdi->ops->generic_packet(cdi, &cgc);
967
968 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
969 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
970 cgc.cmd[2] = 2; /* Close session */
971 cgc.quiet = 1;
972 cgc.timeout = 3000*HZ;
973 cdi->ops->generic_packet(cdi, &cgc);
974
975 cdi->media_written = 0;
976}
977
978static int cdrom_close_write(struct cdrom_device_info *cdi)
979{
980#if 0
981 return cdrom_flush_cache(cdi);
982#else
983 return 0;
984#endif
985}
986
987/* We use the open-option O_NONBLOCK to indicate that the
988 * purpose of opening is only for subsequent ioctl() calls; no device
989 * integrity checks are performed.
990 *
991 * We hope that all cd-player programs will adopt this convention. It
992 * is in their own interest: device control becomes a lot easier
993 * this way.
994 */
995int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
996{
997 int ret;
998
999 cdinfo(CD_OPEN, "entering cdrom_open\n");
1000
1001 /* if this was a O_NONBLOCK open and we should honor the flags,
1002 * do a quick open without drive/disc integrity checks. */
1003 cdi->use_count++;
1004 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
1005 ret = cdi->ops->open(cdi, 1);
1006 } else {
1007 ret = open_for_data(cdi);
1008 if (ret)
1009 goto err;
1010 cdrom_mmc3_profile(cdi);
1011 if (fp->f_mode & FMODE_WRITE) {
1012 ret = -EROFS;
1013 if (cdrom_open_write(cdi))
16070428 1014 goto err_release;
1da177e4 1015 if (!CDROM_CAN(CDC_RAM))
16070428 1016 goto err_release;
1da177e4
LT		 1017 ret = 0;
1018 cdi->media_written = 0;
1019 }
1020 }
1021
1022 if (ret)
1023 goto err;
1024
1025 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1026 cdi->name, cdi->use_count);
1027 /* Do this on open. Don't wait for mount, because they might
1028 not be mounting, but opening with O_NONBLOCK */
1029 check_disk_change(ip->i_bdev);
1030 return 0;
16070428 1031err_release:
ae3ba4fd
AV		 1032 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1033 cdi->ops->lock_door(cdi, 0);
1034 cdinfo(CD_OPEN, "door unlocked.\n");
1035 }
16070428 1036 cdi->ops->release(cdi);
1da177e4
LT		 1037err:
1038 cdi->use_count--;
1039 return ret;
1040}
1041
1042static
1043int open_for_data(struct cdrom_device_info * cdi)
1044{
1045 int ret;
1046 struct cdrom_device_ops *cdo = cdi->ops;
1047 tracktype tracks;
1048 cdinfo(CD_OPEN, "entering open_for_data\n");
1049 /* Check if the driver can report drive status. If it can, we
1050 can do clever things. If it can't, well, we at least tried! */
1051 if (cdo->drive_status != NULL) {
1052 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1053 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1054 if (ret == CDS_TRAY_OPEN) {
1055 cdinfo(CD_OPEN, "the tray is open...\n");
1056 /* can/may i close it? */
1057 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1058 cdi->options & CDO_AUTO_CLOSE) {
1059 cdinfo(CD_OPEN, "trying to close the tray.\n");
1060 ret=cdo->tray_move(cdi,0);
1061 if (ret) {
1062 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1063 /* Ignore the error from the low
1064 level driver. We don't care why it
1065 couldn't close the tray. We only care
1066 that there is no disc in the drive,
1067 since that is the _REAL_ problem here.*/
1068 ret=-ENOMEDIUM;
1069 goto clean_up_and_return;
1070 }
1071 } else {
1072 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1073 ret=-ENOMEDIUM;
1074 goto clean_up_and_return;
1075 }
1076 /* Ok, the door should be closed now.. Check again */
1077 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1078 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1079 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1080 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1081 ret=-ENOMEDIUM;
1082 goto clean_up_and_return;
1083 }
1084 cdinfo(CD_OPEN, "the tray is now closed.\n");
1085 }
1086 /* the door should be closed now, check for the disc */
1087 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1088 if (ret!=CDS_DISC_OK) {
1089 ret = -ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 }
1093 cdrom_count_tracks(cdi, &tracks);
1094 if (tracks.error == CDS_NO_DISC) {
1095 cdinfo(CD_OPEN, "bummer. no disc.\n");
1096 ret=-ENOMEDIUM;
1097 goto clean_up_and_return;
1098 }
1099 /* CD-Players which don't use O_NONBLOCK, workman
1100 * for example, need bit CDO_CHECK_TYPE cleared! */
1101 if (tracks.data==0) {
1102 if (cdi->options & CDO_CHECK_TYPE) {
1103 /* give people a warning shot, now that CDO_CHECK_TYPE
1104 is the default case! */
1105 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1106 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
ba25f9dc 1107 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1108 ret=-EMEDIUMTYPE;
1109 goto clean_up_and_return;
1110 }
1111 else {
1112 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1113 }
1114 }
1115
1116 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1117
1118 /* all seems well, we can open the device */
1119 ret = cdo->open(cdi, 0); /* open for data */
1120 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1121 /* After all this careful checking, we shouldn't have problems
1122 opening the device, but we don't want the device locked if
1123 this somehow fails... */
1124 if (ret) {
1125 cdinfo(CD_OPEN, "open device failed.\n");
1126 goto clean_up_and_return;
1127 }
1128 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1129 cdo->lock_door(cdi, 1);
1130 cdinfo(CD_OPEN, "door locked.\n");
1131 }
1132 cdinfo(CD_OPEN, "device opened successfully.\n");
1133 return ret;
1134
1135 /* Something failed. Try to unlock the drive, because some drivers
1136 (notably ide-cd) lock the drive after every command. This produced
1137 a nasty bug where after mount failed, the drive would remain locked!
1138 This ensures that the drive gets unlocked after a mount fails. This
1139 is a goto to avoid bloating the driver with redundant code. */
1140clean_up_and_return:
00d6da9b 1141 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1142 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1143 cdo->lock_door(cdi, 0);
1144 cdinfo(CD_OPEN, "door unlocked.\n");
1145 }
1146 return ret;
1147}
1148
1149/* This code is similar to that in open_for_data. The routine is called
1150 whenever an audio play operation is requested.
1151*/
ecb80c6a
AB		 1152static int check_for_audio_disc(struct cdrom_device_info * cdi,
1153 struct cdrom_device_ops * cdo)
1da177e4
LT		 1154{
1155 int ret;
1156 tracktype tracks;
1157 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1158 if (!(cdi->options & CDO_CHECK_TYPE))
1159 return 0;
1160 if (cdo->drive_status != NULL) {
1161 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1162 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1163 if (ret == CDS_TRAY_OPEN) {
1164 cdinfo(CD_OPEN, "the tray is open...\n");
1165 /* can/may i close it? */
1166 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1167 cdi->options & CDO_AUTO_CLOSE) {
1168 cdinfo(CD_OPEN, "trying to close the tray.\n");
1169 ret=cdo->tray_move(cdi,0);
1170 if (ret) {
1171 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1172 /* Ignore the error from the low
1173 level driver. We don't care why it
1174 couldn't close the tray. We only care
1175 that there is no disc in the drive,
1176 since that is the _REAL_ problem here.*/
1177 return -ENOMEDIUM;
1178 }
1179 } else {
1180 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1181 return -ENOMEDIUM;
1182 }
1183 /* Ok, the door should be closed now.. Check again */
1184 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1185 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1186 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1187 return -ENOMEDIUM;
1188 }
1189 if (ret!=CDS_DISC_OK) {
1190 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1191 return -EIO;
1192 }
1193 cdinfo(CD_OPEN, "the tray is now closed.\n");
1194 }
1195 }
1196 cdrom_count_tracks(cdi, &tracks);
1197 if (tracks.error)
1198 return(tracks.error);
1199
1200 if (tracks.audio==0)
1201 return -EMEDIUMTYPE;
1202
1203 return 0;
1204}
1205
1da177e4
LT		 1206int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1207{
1208 struct cdrom_device_ops *cdo = cdi->ops;
1209 int opened_for_data;
1210
35841f70 1211 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1212
1213 if (cdi->use_count > 0)
1214 cdi->use_count--;
35841f70
BP		 1215
1216 if (cdi->use_count == 0) {
1da177e4 1217 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1da177e4 1218 cdrom_dvd_rw_close_write(cdi);
35841f70
BP		 1219
1220 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1221 cdinfo(CD_CLOSE, "Unlocking door!\n");
1222 cdo->lock_door(cdi, 0);
1223 }
1da177e4 1224 }
35841f70 1225
1da177e4
LT		 1226 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1227 !(fp && fp->f_flags & O_NONBLOCK);
1228
1229 /*
1230 * flush cache on last write release
1231 */
1232 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1233 cdrom_close_write(cdi);
1234
1235 cdo->release(cdi);
1236 if (cdi->use_count == 0) { /* last process that closes dev*/
1237 if (opened_for_data &&
1238 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1239 cdo->tray_move(cdi, 1);
1240 }
1241 return 0;
1242}
1243
1244static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1245 struct cdrom_changer_info *buf)
1246{
1247 struct packet_command cgc;
1248 struct cdrom_device_ops *cdo = cdi->ops;
1249 int length;
1250
1251 /*
1252 * Sanyo changer isn't spec compliant (doesn't use regular change
1253 * LOAD_UNLOAD command, and it doesn't implement the mech status
1254 * command below
1255 */
1256 if (cdi->sanyo_slot) {
1257 buf->hdr.nslots = 3;
1258 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1259 for (length = 0; length < 3; length++) {
1260 buf->slots[length].disc_present = 1;
1261 buf->slots[length].change = 0;
1262 }
1263 return 0;
1264 }
1265
1266 length = sizeof(struct cdrom_mechstat_header) +
1267 cdi->capacity * sizeof(struct cdrom_slot);
1268
1269 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1270 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1271 cgc.cmd[8] = (length >> 8) & 0xff;
1272 cgc.cmd[9] = length & 0xff;
1273 return cdo->generic_packet(cdi, &cgc);
1274}
1275
1276static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1277{
1278 struct cdrom_changer_info *info;
1279 int ret;
1280
1281 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1282 if (cdi->sanyo_slot)
1283 return CDS_NO_INFO;
1284
1285 info = kmalloc(sizeof(*info), GFP_KERNEL);
1286 if (!info)
1287 return -ENOMEM;
1288
1289 if ((ret = cdrom_read_mech_status(cdi, info)))
1290 goto out_free;
1291
1292 if (info->slots[slot].disc_present)
1293 ret = CDS_DISC_OK;
1294 else
1295 ret = CDS_NO_DISC;
1296
1297out_free:
1298 kfree(info);
1299 return ret;
1300}
1301
1302/* Return the number of slots for an ATAPI/SCSI cdrom,
1303 * return 1 if not a changer.
1304 */
1305int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1306{
1307 int status;
1308 int nslots = 1;
1309 struct cdrom_changer_info *info;
1310
1311 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1312 /* cdrom_read_mech_status requires a valid value for capacity: */
1313 cdi->capacity = 0;
1314
1315 info = kmalloc(sizeof(*info), GFP_KERNEL);
1316 if (!info)
1317 return -ENOMEM;
1318
1319 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1320 nslots = info->hdr.nslots;
1321
1322 kfree(info);
1323 return nslots;
1324}
1325
1326
1327/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1328static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1329{
1330 struct packet_command cgc;
1331
1332 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1333 if (cdi->sanyo_slot && slot < 0)
1334 return 0;
1335
1336 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1337 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1338 cgc.cmd[4] = 2 + (slot >= 0);
1339 cgc.cmd[8] = slot;
1340 cgc.timeout = 60 * HZ;
1341
1342 /* The Sanyo 3 CD changer uses byte 7 of the
1343 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1344 using the GPCMD_LOAD_UNLOAD opcode. */
1345 if (cdi->sanyo_slot && -1 < slot) {
1346 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1347 cgc.cmd[7] = slot;
1348 cgc.cmd[4] = cgc.cmd[8] = 0;
1349 cdi->sanyo_slot = slot ? slot : 3;
1350 }
1351
1352 return cdi->ops->generic_packet(cdi, &cgc);
1353}
1354
1355static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1356{
1357 struct cdrom_changer_info *info;
1358 int curslot;
1359 int ret;
1360
1361 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1362 if (!CDROM_CAN(CDC_SELECT_DISC))
1363 return -EDRIVE_CANT_DO_THIS;
1364
1365 (void) cdi->ops->media_changed(cdi, slot);
1366
1367 if (slot == CDSL_NONE) {
1368 /* set media changed bits, on both queues */
1369 cdi->mc_flags = 0x3;
1370 return cdrom_load_unload(cdi, -1);
1371 }
1372
1373 info = kmalloc(sizeof(*info), GFP_KERNEL);
1374 if (!info)
1375 return -ENOMEM;
1376
1377 if ((ret = cdrom_read_mech_status(cdi, info))) {
1378 kfree(info);
1379 return ret;
1380 }
1381
1382 curslot = info->hdr.curslot;
1383 kfree(info);
1384
1385 if (cdi->use_count > 1 || keeplocked) {
1386 if (slot == CDSL_CURRENT) {
1387 return curslot;
1388 } else {
1389 return -EBUSY;
1390 }
1391 }
1392
1393 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1394 which is useful if it had been previously unloaded.
1395 Whether it can or not, it returns the current slot.
1396 Similarly, if slot happens to be the current one, we still
1397 try and load it. */
1398 if (slot == CDSL_CURRENT)
1399 slot = curslot;
1400
1401 /* set media changed bits on both queues */
1402 cdi->mc_flags = 0x3;
1403 if ((ret = cdrom_load_unload(cdi, slot)))
1404 return ret;
1405
1406 return slot;
1407}
1408
1409/* We want to make media_changed accessible to the user through an
1410 * ioctl. The main problem now is that we must double-buffer the
1411 * low-level implementation, to assure that the VFS and the user both
1412 * see a medium change once.
1413 */
1414
1415static
1416int media_changed(struct cdrom_device_info *cdi, int queue)
1417{
1418 unsigned int mask = (1 << (queue & 1));
1419 int ret = !!(cdi->mc_flags & mask);
1420
1421 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1422 return ret;
1423 /* changed since last call? */
1424 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1425 cdi->mc_flags = 0x3; /* set bit on both queues */
1426 ret |= 1;
1427 cdi->media_written = 0;
1428 }
1429 cdi->mc_flags &= ~mask; /* clear bit */
1430 return ret;
1431}
1432
1433int cdrom_media_changed(struct cdrom_device_info *cdi)
1434{
1435 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1436 * Returning "0" is always safe (media hasn't been changed). Do that
1437 * if the low-level cdrom driver dosn't support media changed. */
1438 if (cdi == NULL || cdi->ops->media_changed == NULL)
1439 return 0;
1440 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1441 return 0;
1442 return media_changed(cdi, 0);
1443}
1444
1445/* badly broken, I know. Is due for a fixup anytime. */
1446static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1447{
1448 struct cdrom_tochdr header;
1449 struct cdrom_tocentry entry;
1450 int ret, i;
1451 tracks->data=0;
1452 tracks->audio=0;
1453 tracks->cdi=0;
1454 tracks->xa=0;
1455 tracks->error=0;
1456 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1457 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1458 tracks->error=CDS_NO_INFO;
1459 return;
1460 }
1461 /* Grab the TOC header so we can see how many tracks there are */
1462 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1463 if (ret == -ENOMEDIUM)
1464 tracks->error = CDS_NO_DISC;
1465 else
1466 tracks->error = CDS_NO_INFO;
1467 return;
1468 }
1469 /* check what type of tracks are on this disc */
1470 entry.cdte_format = CDROM_MSF;
1471 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1472 entry.cdte_track = i;
1473 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1474 tracks->error=CDS_NO_INFO;
1475 return;
1476 }
1477 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1478 if (entry.cdte_format == 0x10)
1479 tracks->cdi++;
1480 else if (entry.cdte_format == 0x20)
1481 tracks->xa++;
1482 else
1483 tracks->data++;
1484 } else
1485 tracks->audio++;
1486 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1487 i, entry.cdte_format, entry.cdte_ctrl);
1488 }
1489 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1490 header.cdth_trk1, tracks->audio, tracks->data,
1491 tracks->cdi, tracks->xa);
1492}
1493
1494/* Requests to the low-level drivers will /always/ be done in the
1495 following format convention:
1496
1497 CDROM_LBA: all data-related requests.
1498 CDROM_MSF: all audio-related requests.
1499
1500 However, a low-level implementation is allowed to refuse this
1501 request, and return information in its own favorite format.
1502
1503 It doesn't make sense /at all/ to ask for a play_audio in LBA
1504 format, or ask for multi-session info in MSF format. However, for
1505 backward compatibility these format requests will be satisfied, but
1506 the requests to the low-level drivers will be sanitized in the more
1507 meaningful format indicated above.
1508 */
1509
1510static
1511void sanitize_format(union cdrom_addr *addr,
1512 u_char * curr, u_char requested)
1513{
1514 if (*curr == requested)
1515 return; /* nothing to be done! */
1516 if (requested == CDROM_LBA) {
1517 addr->lba = (int) addr->msf.frame +
1518 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1519 } else { /* CDROM_MSF */
1520 int lba = addr->lba;
1521 addr->msf.frame = lba % 75;
1522 lba /= 75;
1523 lba += 2;
1524 addr->msf.second = lba % 60;
1525 addr->msf.minute = lba / 60;
1526 }
1527 *curr = requested;
1528}
1529
1530void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1531 int type)
1532{
1533 memset(cgc, 0, sizeof(struct packet_command));
1534 if (buf)
1535 memset(buf, 0, len);
1536 cgc->buffer = (char *) buf;
1537 cgc->buflen = len;
1538 cgc->data_direction = type;
2e11c207 1539 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1540}
1541
1542/* DVD handling */
1543
1544#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1545#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1546
1547static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1548{
1549 cgc->cmd[0] = GPCMD_REPORT_KEY;
1550 cgc->cmd[10] = type | (agid << 6);
1551 switch (type) {
1552 case 0: case 8: case 5: {
1553 cgc->buflen = 8;
1554 break;
1555 }
1556 case 1: {
1557 cgc->buflen = 16;
1558 break;
1559 }
1560 case 2: case 4: {
1561 cgc->buflen = 12;
1562 break;
1563 }
1564 }
1565 cgc->cmd[9] = cgc->buflen;
1566 cgc->data_direction = CGC_DATA_READ;
1567}
1568
1569static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1570{
1571 cgc->cmd[0] = GPCMD_SEND_KEY;
1572 cgc->cmd[10] = type | (agid << 6);
1573 switch (type) {
1574 case 1: {
1575 cgc->buflen = 16;
1576 break;
1577 }
1578 case 3: {
1579 cgc->buflen = 12;
1580 break;
1581 }
1582 case 6: {
1583 cgc->buflen = 8;
1584 break;
1585 }
1586 }
1587 cgc->cmd[9] = cgc->buflen;
1588 cgc->data_direction = CGC_DATA_WRITE;
1589}
1590
1591static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1592{
1593 int ret;
1594 u_char buf[20];
1595 struct packet_command cgc;
1596 struct cdrom_device_ops *cdo = cdi->ops;
1597 rpc_state_t rpc_state;
1598
1599 memset(buf, 0, sizeof(buf));
1600 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1601
1602 switch (ai->type) {
1603 /* LU data send */
1604 case DVD_LU_SEND_AGID:
1605 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1606 cgc.quiet = 1;
1607 setup_report_key(&cgc, ai->lsa.agid, 0);
1608
1609 if ((ret = cdo->generic_packet(cdi, &cgc)))
1610 return ret;
1611
1612 ai->lsa.agid = buf[7] >> 6;
1613 /* Returning data, let host change state */
1614 break;
1615
1616 case DVD_LU_SEND_KEY1:
1617 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1618 setup_report_key(&cgc, ai->lsk.agid, 2);
1619
1620 if ((ret = cdo->generic_packet(cdi, &cgc)))
1621 return ret;
1622
1623 copy_key(ai->lsk.key, &buf[4]);
1624 /* Returning data, let host change state */
1625 break;
1626
1627 case DVD_LU_SEND_CHALLENGE:
1628 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1629 setup_report_key(&cgc, ai->lsc.agid, 1);
1630
1631 if ((ret = cdo->generic_packet(cdi, &cgc)))
1632 return ret;
1633
1634 copy_chal(ai->lsc.chal, &buf[4]);
1635 /* Returning data, let host change state */
1636 break;
1637
1638 /* Post-auth key */
1639 case DVD_LU_SEND_TITLE_KEY:
1640 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1641 cgc.quiet = 1;
1642 setup_report_key(&cgc, ai->lstk.agid, 4);
1643 cgc.cmd[5] = ai->lstk.lba;
1644 cgc.cmd[4] = ai->lstk.lba >> 8;
1645 cgc.cmd[3] = ai->lstk.lba >> 16;
1646 cgc.cmd[2] = ai->lstk.lba >> 24;
1647
1648 if ((ret = cdo->generic_packet(cdi, &cgc)))
1649 return ret;
1650
1651 ai->lstk.cpm = (buf[4] >> 7) & 1;
1652 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1653 ai->lstk.cgms = (buf[4] >> 4) & 3;
1654 copy_key(ai->lstk.title_key, &buf[5]);
1655 /* Returning data, let host change state */
1656 break;
1657
1658 case DVD_LU_SEND_ASF:
1659 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1660 setup_report_key(&cgc, ai->lsasf.agid, 5);
1661
1662 if ((ret = cdo->generic_packet(cdi, &cgc)))
1663 return ret;
1664
1665 ai->lsasf.asf = buf[7] & 1;
1666 break;
1667
1668 /* LU data receive (LU changes state) */
1669 case DVD_HOST_SEND_CHALLENGE:
1670 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1671 setup_send_key(&cgc, ai->hsc.agid, 1);
1672 buf[1] = 0xe;
1673 copy_chal(&buf[4], ai->hsc.chal);
1674
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
1676 return ret;
1677
1678 ai->type = DVD_LU_SEND_KEY1;
1679 break;
1680
1681 case DVD_HOST_SEND_KEY2:
1682 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1683 setup_send_key(&cgc, ai->hsk.agid, 3);
1684 buf[1] = 0xa;
1685 copy_key(&buf[4], ai->hsk.key);
1686
1687 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1688 ai->type = DVD_AUTH_FAILURE;
1689 return ret;
1690 }
1691 ai->type = DVD_AUTH_ESTABLISHED;
1692 break;
1693
1694 /* Misc */
1695 case DVD_INVALIDATE_AGID:
1696 cgc.quiet = 1;
1697 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1698 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1699 if ((ret = cdo->generic_packet(cdi, &cgc)))
1700 return ret;
1701 break;
1702
1703 /* Get region settings */
1704 case DVD_LU_SEND_RPC_STATE:
1705 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1706 setup_report_key(&cgc, 0, 8);
1707 memset(&rpc_state, 0, sizeof(rpc_state_t));
1708 cgc.buffer = (char *) &rpc_state;
1709
1710 if ((ret = cdo->generic_packet(cdi, &cgc)))
1711 return ret;
1712
1713 ai->lrpcs.type = rpc_state.type_code;
1714 ai->lrpcs.vra = rpc_state.vra;
1715 ai->lrpcs.ucca = rpc_state.ucca;
1716 ai->lrpcs.region_mask = rpc_state.region_mask;
1717 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1718 break;
1719
1720 /* Set region settings */
1721 case DVD_HOST_SEND_RPC_STATE:
1722 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1723 setup_send_key(&cgc, 0, 6);
1724 buf[1] = 6;
1725 buf[4] = ai->hrpcs.pdrc;
1726
1727 if ((ret = cdo->generic_packet(cdi, &cgc)))
1728 return ret;
1729 break;
1730
1731 default:
1732 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1733 return -ENOTTY;
1734 }
1735
1736 return 0;
1737}
1738
1739static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1740{
1741 unsigned char buf[21], *base;
1742 struct dvd_layer *layer;
1743 struct packet_command cgc;
1744 struct cdrom_device_ops *cdo = cdi->ops;
1745 int ret, layer_num = s->physical.layer_num;
1746
1747 if (layer_num >= DVD_LAYERS)
1748 return -EINVAL;
1749
1750 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1751 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1752 cgc.cmd[6] = layer_num;
1753 cgc.cmd[7] = s->type;
1754 cgc.cmd[9] = cgc.buflen & 0xff;
1755
1756 /*
1757 * refrain from reporting errors on non-existing layers (mainly)
1758 */
1759 cgc.quiet = 1;
1760
1761 if ((ret = cdo->generic_packet(cdi, &cgc)))
1762 return ret;
1763
1764 base = &buf[4];
1765 layer = &s->physical.layer[layer_num];
1766
1767 /*
1768 * place the data... really ugly, but at least we won't have to
1769 * worry about endianess in userspace.
1770 */
1771 memset(layer, 0, sizeof(*layer));
1772 layer->book_version = base[0] & 0xf;
1773 layer->book_type = base[0] >> 4;
1774 layer->min_rate = base[1] & 0xf;
1775 layer->disc_size = base[1] >> 4;
1776 layer->layer_type = base[2] & 0xf;
1777 layer->track_path = (base[2] >> 4) & 1;
1778 layer->nlayers = (base[2] >> 5) & 3;
1779 layer->track_density = base[3] & 0xf;
1780 layer->linear_density = base[3] >> 4;
1781 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1782 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1783 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1784 layer->bca = base[16] >> 7;
1785
1786 return 0;
1787}
1788
1789static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1790{
1791 int ret;
1792 u_char buf[8];
1793 struct packet_command cgc;
1794 struct cdrom_device_ops *cdo = cdi->ops;
1795
1796 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1797 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1798 cgc.cmd[6] = s->copyright.layer_num;
1799 cgc.cmd[7] = s->type;
1800 cgc.cmd[8] = cgc.buflen >> 8;
1801 cgc.cmd[9] = cgc.buflen & 0xff;
1802
1803 if ((ret = cdo->generic_packet(cdi, &cgc)))
1804 return ret;
1805
1806 s->copyright.cpst = buf[4];
1807 s->copyright.rmi = buf[5];
1808
1809 return 0;
1810}
1811
1812static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1813{
1814 int ret, size;
1815 u_char *buf;
1816 struct packet_command cgc;
1817 struct cdrom_device_ops *cdo = cdi->ops;
1818
1819 size = sizeof(s->disckey.value) + 4;
1820
5cbded58 1821 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1822 return -ENOMEM;
1823
1824 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1825 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1826 cgc.cmd[7] = s->type;
1827 cgc.cmd[8] = size >> 8;
1828 cgc.cmd[9] = size & 0xff;
1829 cgc.cmd[10] = s->disckey.agid << 6;
1830
1831 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1832 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1833
1834 kfree(buf);
1835 return ret;
1836}
1837
1838static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1839{
1840 int ret;
1841 u_char buf[4 + 188];
1842 struct packet_command cgc;
1843 struct cdrom_device_ops *cdo = cdi->ops;
1844
1845 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1846 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1847 cgc.cmd[7] = s->type;
454d6fbc 1848 cgc.cmd[9] = cgc.buflen & 0xff;
1da177e4
LT		 1849
1850 if ((ret = cdo->generic_packet(cdi, &cgc)))
1851 return ret;
1852
1853 s->bca.len = buf[0] << 8 | buf[1];
1854 if (s->bca.len < 12 || s->bca.len > 188) {
1855 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1856 return -EIO;
1857 }
1858 memcpy(s->bca.value, &buf[4], s->bca.len);
1859
1860 return 0;
1861}
1862
1863static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1864{
1865 int ret = 0, size;
1866 u_char *buf;
1867 struct packet_command cgc;
1868 struct cdrom_device_ops *cdo = cdi->ops;
1869
1870 size = sizeof(s->manufact.value) + 4;
1871
5cbded58 1872 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1873 return -ENOMEM;
1874
1875 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1876 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1877 cgc.cmd[7] = s->type;
1878 cgc.cmd[8] = size >> 8;
1879 cgc.cmd[9] = size & 0xff;
1880
1881 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1882 kfree(buf);
1883 return ret;
1884 }
1885
1886 s->manufact.len = buf[0] << 8 | buf[1];
1887 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1888 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1889 " (%d)\n", s->manufact.len);
1890 ret = -EIO;
1891 } else {
1892 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1893 }
1894
1895 kfree(buf);
1896 return ret;
1897}
1898
1899static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1900{
1901 switch (s->type) {
1902 case DVD_STRUCT_PHYSICAL:
1903 return dvd_read_physical(cdi, s);
1904
1905 case DVD_STRUCT_COPYRIGHT:
1906 return dvd_read_copyright(cdi, s);
1907
1908 case DVD_STRUCT_DISCKEY:
1909 return dvd_read_disckey(cdi, s);
1910
1911 case DVD_STRUCT_BCA:
1912 return dvd_read_bca(cdi, s);
1913
1914 case DVD_STRUCT_MANUFACT:
1915 return dvd_read_manufact(cdi, s);
1916
1917 default:
1918 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1919 s->type);
1920 return -EINVAL;
1921 }
1922}
1923
1924int cdrom_mode_sense(struct cdrom_device_info *cdi,
1925 struct packet_command *cgc,
1926 int page_code, int page_control)
1927{
1928 struct cdrom_device_ops *cdo = cdi->ops;
1929
1930 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1931
1932 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1933 cgc->cmd[2] = page_code | (page_control << 6);
1934 cgc->cmd[7] = cgc->buflen >> 8;
1935 cgc->cmd[8] = cgc->buflen & 0xff;
1936 cgc->data_direction = CGC_DATA_READ;
1937 return cdo->generic_packet(cdi, cgc);
1938}
1939
1940int cdrom_mode_select(struct cdrom_device_info *cdi,
1941 struct packet_command *cgc)
1942{
1943 struct cdrom_device_ops *cdo = cdi->ops;
1944
1945 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1946 memset(cgc->buffer, 0, 2);
1947 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1948 cgc->cmd[1] = 0x10; /* PF */
1949 cgc->cmd[7] = cgc->buflen >> 8;
1950 cgc->cmd[8] = cgc->buflen & 0xff;
1951 cgc->data_direction = CGC_DATA_WRITE;
1952 return cdo->generic_packet(cdi, cgc);
1953}
1954
1955static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1956 struct cdrom_subchnl *subchnl, int mcn)
1957{
1958 struct cdrom_device_ops *cdo = cdi->ops;
1959 struct packet_command cgc;
1960 char buffer[32];
1961 int ret;
1962
1963 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1964 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1965 cgc.cmd[1] = 2; /* MSF addressing */
1966 cgc.cmd[2] = 0x40; /* request subQ data */
1967 cgc.cmd[3] = mcn ? 2 : 1;
1968 cgc.cmd[8] = 16;
1969
1970 if ((ret = cdo->generic_packet(cdi, &cgc)))
1971 return ret;
1972
1973 subchnl->cdsc_audiostatus = cgc.buffer[1];
1974 subchnl->cdsc_format = CDROM_MSF;
1975 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1976 subchnl->cdsc_trk = cgc.buffer[6];
1977 subchnl->cdsc_ind = cgc.buffer[7];
1978
1979 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1980 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1981 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1982 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1983 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1984 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1985
1986 return 0;
1987}
1988
1989/*
1990 * Specific READ_10 interface
1991 */
1992static int cdrom_read_cd(struct cdrom_device_info *cdi,
1993 struct packet_command *cgc, int lba,
1994 int blocksize, int nblocks)
1995{
1996 struct cdrom_device_ops *cdo = cdi->ops;
1997
1998 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1999 cgc->cmd[0] = GPCMD_READ_10;
2000 cgc->cmd[2] = (lba >> 24) & 0xff;
2001 cgc->cmd[3] = (lba >> 16) & 0xff;
2002 cgc->cmd[4] = (lba >> 8) & 0xff;
2003 cgc->cmd[5] = lba & 0xff;
2004 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2005 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2006 cgc->cmd[8] = nblocks & 0xff;
2007 cgc->buflen = blocksize * nblocks;
2008 return cdo->generic_packet(cdi, cgc);
2009}
2010
2011/* very generic interface for reading the various types of blocks */
2012static int cdrom_read_block(struct cdrom_device_info *cdi,
2013 struct packet_command *cgc,
2014 int lba, int nblocks, int format, int blksize)
2015{
2016 struct cdrom_device_ops *cdo = cdi->ops;
2017
2018 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2019 cgc->cmd[0] = GPCMD_READ_CD;
2020 /* expected sector size - cdda,mode1,etc. */
2021 cgc->cmd[1] = format << 2;
2022 /* starting address */
2023 cgc->cmd[2] = (lba >> 24) & 0xff;
2024 cgc->cmd[3] = (lba >> 16) & 0xff;
2025 cgc->cmd[4] = (lba >> 8) & 0xff;
2026 cgc->cmd[5] = lba & 0xff;
2027 /* number of blocks */
2028 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2029 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2030 cgc->cmd[8] = nblocks & 0xff;
2031 cgc->buflen = blksize * nblocks;
2032
2033 /* set the header info returned */
2034 switch (blksize) {
2035 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2036 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2037 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2038 default : cgc->cmd[9] = 0x10;
2039 }
2040
2041 return cdo->generic_packet(cdi, cgc);
2042}
2043
2044static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2045 int lba, int nframes)
2046{
2047 struct packet_command cgc;
2048 int ret = 0;
2049 int nr;
2050
2051 cdi->last_sense = 0;
2052
2053 memset(&cgc, 0, sizeof(cgc));
2054
2055 /*
2056 * start with will ra.nframes size, back down if alloc fails
2057 */
2058 nr = nframes;
2059 do {
2060 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2061 if (cgc.buffer)
2062 break;
2063
2064 nr >>= 1;
2065 } while (nr);
2066
2067 if (!nr)
2068 return -ENOMEM;
2069
2070 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2071 ret = -EFAULT;
2072 goto out;
2073 }
2074
2075 cgc.data_direction = CGC_DATA_READ;
2076 while (nframes > 0) {
2077 if (nr > nframes)
2078 nr = nframes;
2079
2080 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2081 if (ret)
2082 break;
2083 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2084 ret = -EFAULT;
2085 break;
2086 }
2087 ubuf += CD_FRAMESIZE_RAW * nr;
2088 nframes -= nr;
2089 lba += nr;
2090 }
2091out:
2092 kfree(cgc.buffer);
2093 return ret;
2094}
2095
2096static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2097 int lba, int nframes)
2098{
165125e1 2099 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2100 struct request *rq;
2101 struct bio *bio;
2102 unsigned int len;
2103 int nr, ret = 0;
2104
2105 if (!q)
2106 return -ENXIO;
2107
dd1cab95
JA		 2108 rq = blk_get_request(q, READ, GFP_KERNEL);
2109 if (!rq)
2110 return -ENOMEM;
2111
1da177e4
LT		 2112 cdi->last_sense = 0;
2113
2114 while (nframes) {
2115 nr = nframes;
2116 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2117 nr = 1;
2118 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2119 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2120
2121 len = nr * CD_FRAMESIZE_RAW;
2122
dd1cab95
JA		 2123 ret = blk_rq_map_user(q, rq, ubuf, len);
2124 if (ret)
2125 break;
1da177e4
LT		 2126
2127 memset(rq->cmd, 0, sizeof(rq->cmd));
2128 rq->cmd[0] = GPCMD_READ_CD;
2129 rq->cmd[1] = 1 << 2;
2130 rq->cmd[2] = (lba >> 24) & 0xff;
2131 rq->cmd[3] = (lba >> 16) & 0xff;
2132 rq->cmd[4] = (lba >> 8) & 0xff;
2133 rq->cmd[5] = lba & 0xff;
2134 rq->cmd[6] = (nr >> 16) & 0xff;
2135 rq->cmd[7] = (nr >> 8) & 0xff;
2136 rq->cmd[8] = nr & 0xff;
2137 rq->cmd[9] = 0xf8;
2138
2139 rq->cmd_len = 12;
4aff5e23 2140 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2141 rq->timeout = 60 * HZ;
2142 bio = rq->bio;
2143
994ca9a1 2144 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2145 struct request_sense *s = rq->sense;
2146 ret = -EIO;
2147 cdi->last_sense = s->sense_key;
2148 }
2149
8e5cfc45 2150 if (blk_rq_unmap_user(bio))
1da177e4
LT		 2151 ret = -EFAULT;
2152
2153 if (ret)
2154 break;
2155
2156 nframes -= nr;
2157 lba += nr;
2158 ubuf += len;
2159 }
2160
dd1cab95 2161 blk_put_request(rq);
1da177e4
LT		 2162 return ret;
2163}
2164
2165static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2166 int lba, int nframes)
2167{
2168 int ret;
2169
2170 if (cdi->cdda_method == CDDA_OLD)
2171 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2172
2173retry:
2174 /*
2175 * for anything else than success and io error, we need to retry
2176 */
2177 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2178 if (!ret || ret != -EIO)
2179 return ret;
2180
2181 /*
2182 * I've seen drives get sense 4/8/3 udma crc errors on multi
2183 * frame dma, so drop to single frame dma if we need to
2184 */
2185 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2186 printk("cdrom: dropping to single frame dma\n");
2187 cdi->cdda_method = CDDA_BPC_SINGLE;
2188 goto retry;
2189 }
2190
2191 /*
2192 * so we have an io error of some sort with multi frame dma. if the
2193 * condition wasn't a hardware error
2194 * problems, not for any error
2195 */
2196 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2197 return ret;
2198
2199 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2200 cdi->cdda_method = CDDA_OLD;
2201 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2202}
2203
d2c5d4fc
CH		 2204static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2205 void __user *argp)
1da177e4 2206{
d2c5d4fc
CH		 2207 struct cdrom_multisession ms_info;
2208 u8 requested_format;
1da177e4
LT		 2209 int ret;
2210
d2c5d4fc
CH		 2211 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2212
2213 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2214 return -ENOSYS;
2215
2216 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2217 return -EFAULT;
2218
2219 requested_format = ms_info.addr_format;
2220 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2221 return -EINVAL;
2222 ms_info.addr_format = CDROM_LBA;
2223
2224 ret = cdi->ops->get_last_session(cdi, &ms_info);
2225 if (ret)
1da177e4
LT		 2226 return ret;
2227
d2c5d4fc
CH		 2228 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2229
2230 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2231 return -EFAULT;
2232
2233 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2234 return 0;
2235}
2236
2237static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2238{
2239 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2240
2241 if (!CDROM_CAN(CDC_OPEN_TRAY))
2242 return -ENOSYS;
2243 if (cdi->use_count != 1 || keeplocked)
2244 return -EBUSY;
2245 if (CDROM_CAN(CDC_LOCK)) {
2246 int ret = cdi->ops->lock_door(cdi, 0);
2247 if (ret)
1da177e4 2248 return ret;
d2c5d4fc 2249 }
1da177e4 2250
d2c5d4fc
CH		 2251 return cdi->ops->tray_move(cdi, 1);
2252}
1da177e4 2253
d2c5d4fc
CH		 2254static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2255{
2256 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2257
d2c5d4fc
CH		 2258 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2259 return -ENOSYS;
2260 return cdi->ops->tray_move(cdi, 0);
2261}
1da177e4 2262
d2c5d4fc
CH		 2263static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2264 unsigned long arg)
2265{
2266 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2267
d2c5d4fc
CH		 2268 if (!CDROM_CAN(CDC_OPEN_TRAY))
2269 return -ENOSYS;
2270 if (keeplocked)
2271 return -EBUSY;
1da177e4 2272
d2c5d4fc
CH		 2273 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2274 if (arg)
2275 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2276 return 0;
2277}
1da177e4 2278
d2c5d4fc
CH		 2279static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2280 unsigned long arg)
2281{
2282 struct cdrom_changer_info *info;
2283 int ret;
1da177e4 2284
d2c5d4fc 2285 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2286
d2c5d4fc
CH		 2287 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2288 return -ENOSYS;
1da177e4 2289
d2c5d4fc
CH		 2290 /* cannot select disc or select current disc */
2291 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2292 return media_changed(cdi, 1);
1da177e4 2293
d2c5d4fc
CH		 2294 if ((unsigned int)arg >= cdi->capacity)
2295 return -EINVAL;
1da177e4 2296
d2c5d4fc
CH		 2297 info = kmalloc(sizeof(*info), GFP_KERNEL);
2298 if (!info)
2299 return -ENOMEM;
1da177e4 2300
d2c5d4fc
CH		 2301 ret = cdrom_read_mech_status(cdi, info);
2302 if (!ret)
2303 ret = info->slots[arg].change;
2304 kfree(info);
2305 return ret;
2306}
1da177e4 2307
d2c5d4fc
CH		 2308static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2309 unsigned long arg)
2310{
2311 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2312
d2c5d4fc
CH		 2313 /*
2314 * Options need to be in sync with capability.
2315 * Too late for that, so we have to check each one separately.
2316 */
2317 switch (arg) {
2318 case CDO_USE_FFLAGS:
2319 case CDO_CHECK_TYPE:
2320 break;
2321 case CDO_LOCK:
2322 if (!CDROM_CAN(CDC_LOCK))
2323 return -ENOSYS;
2324 break;
2325 case 0:
2326 return cdi->options;
2327 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2328 default:
2329 if (!CDROM_CAN(arg))
1da177e4 2330 return -ENOSYS;
d2c5d4fc
CH		 2331 }
2332 cdi->options |= (int) arg;
2333 return cdi->options;
2334}
1da177e4 2335
d2c5d4fc
CH		 2336static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2337 unsigned long arg)
2338{
2339 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2340
d2c5d4fc
CH		 2341 cdi->options &= ~(int) arg;
2342 return cdi->options;
2343}
1da177e4 2344
d2c5d4fc
CH		 2345static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2346 unsigned long arg)
2347{
2348 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2349
d2c5d4fc
CH		 2350 if (!CDROM_CAN(CDC_SELECT_SPEED))
2351 return -ENOSYS;
2352 return cdi->ops->select_speed(cdi, arg);
2353}
1da177e4 2354
d2c5d4fc
CH		 2355static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2356 unsigned long arg)
2357{
2358 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2359
2360 if (!CDROM_CAN(CDC_SELECT_DISC))
2361 return -ENOSYS;
2362
2363 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2364 if ((int)arg >= cdi->capacity)
2365 return -EINVAL;
2366 }
2367
2368 /*
2369 * ->select_disc is a hook to allow a driver-specific way of
2370 * seleting disc. However, since there is no equivalent hook for
2371 * cdrom_slot_status this may not actually be useful...
2372 */
2373 if (cdi->ops->select_disc)
2374 return cdi->ops->select_disc(cdi, arg);
2375
2376 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2377 return cdrom_select_disc(cdi, arg);
2378}
2379
2380static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2381 struct block_device *bdev)
2382{
2383 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2384
2385 if (!capable(CAP_SYS_ADMIN))
2386 return -EACCES;
2387 if (!CDROM_CAN(CDC_RESET))
2388 return -ENOSYS;
f98393a6 2389 invalidate_bdev(bdev);
d2c5d4fc
CH		 2390 return cdi->ops->reset(cdi);
2391}
2392
2393static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2394 unsigned long arg)
2395{
2396 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2397
2398 if (!CDROM_CAN(CDC_LOCK))
2399 return -EDRIVE_CANT_DO_THIS;
2400
2401 keeplocked = arg ? 1 : 0;
2402
2403 /*
2404 * Don't unlock the door on multiple opens by default, but allow
2405 * root to do so.
2406 */
2407 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2408 return -EBUSY;
2409 return cdi->ops->lock_door(cdi, arg);
2410}
2411
2412static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2413 unsigned long arg)
2414{
2415 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2416
2417 if (!capable(CAP_SYS_ADMIN))
2418 return -EACCES;
2419 debug = arg ? 1 : 0;
2420 return debug;
2421}
1da177e4 2422
d2c5d4fc
CH		 2423static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2424{
2425 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2426 return (cdi->ops->capability & ~cdi->mask);
2427}
2428
2429/*
2430 * The following function is implemented, although very few audio
1da177e4
LT		 2431 * discs give Universal Product Code information, which should just be
2432 * the Medium Catalog Number on the box. Note, that the way the code
2433 * is written on the CD is /not/ uniform across all discs!
2434 */
d2c5d4fc
CH		 2435static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2436 void __user *argp)
2437{
2438 struct cdrom_mcn mcn;
2439 int ret;
1da177e4 2440
d2c5d4fc 2441 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2442
d2c5d4fc
CH		 2443 if (!(cdi->ops->capability & CDC_MCN))
2444 return -ENOSYS;
2445 ret = cdi->ops->get_mcn(cdi, &mcn);
2446 if (ret)
2447 return ret;
1da177e4 2448
d2c5d4fc
CH		 2449 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2450 return -EFAULT;
2451 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2452 return 0;
2453}
1da177e4 2454
d2c5d4fc
CH		 2455static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2456 unsigned long arg)
2457{
2458 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2459
2460 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2461 return -ENOSYS;
2462 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2463 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2464 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2465 if (((int)arg >= cdi->capacity))
2466 return -EINVAL;
2467 return cdrom_slot_status(cdi, arg);
2468}
2469
2470/*
2471 * Ok, this is where problems start. The current interface for the
2472 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2473 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2474 * is often the case, it is also very common for CDs to have some tracks
2475 * with data, and some tracks with audio. Just because I feel like it,
2476 * I declare the following to be the best way to cope. If the CD has ANY
2477 * data tracks on it, it will be returned as a data CD. If it has any XA
2478 * tracks, I will return it as that. Now I could simplify this interface
2479 * by combining these returns with the above, but this more clearly
2480 * demonstrates the problem with the current interface. Too bad this
2481 * wasn't designed to use bitmasks... -Erik
2482 *
2483 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2484 * User level programmers might feel the ioctl is not very useful.
2485 * ---david
2486 */
2487static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2488{
2489 tracktype tracks;
2490
2491 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2492
2493 cdrom_count_tracks(cdi, &tracks);
2494 if (tracks.error)
2495 return tracks.error;
2496
2497 /* Policy mode on */
2498 if (tracks.audio > 0) {
2499 if (!tracks.data && !tracks.cdi && !tracks.xa)
2500 return CDS_AUDIO;
2501 else
2502 return CDS_MIXED;
1da177e4
LT		 2503 }
2504
d2c5d4fc
CH		 2505 if (tracks.cdi > 0)
2506 return CDS_XA_2_2;
2507 if (tracks.xa > 0)
2508 return CDS_XA_2_1;
2509 if (tracks.data > 0)
2510 return CDS_DATA_1;
2511 /* Policy mode off */
2512
2513 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2514 return CDS_NO_INFO;
2515}
2516
2517static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2518{
2519 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2520 return cdi->capacity;
2521}
2522
2523static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2524 void __user *argp)
2525{
2526 struct cdrom_subchnl q;
2527 u8 requested, back;
2528 int ret;
2529
2530 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2531
2532 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2533 return -ENOSYS;
2534 if (copy_from_user(&q, argp, sizeof(q)))
2535 return -EFAULT;
2536
2537 requested = q.cdsc_format;
2538 if (requested != CDROM_MSF && requested != CDROM_LBA)
2539 return -EINVAL;
2540 q.cdsc_format = CDROM_MSF;
2541
2542 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2543 if (ret)
2544 return ret;
2545
2546 back = q.cdsc_format; /* local copy */
2547 sanitize_format(&q.cdsc_absaddr, &back, requested);
2548 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2549
2550 if (copy_to_user(argp, &q, sizeof(q)))
2551 return -EFAULT;
2552 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2553 return 0;
2554}
2555
2556static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2557 void __user *argp)
2558{
2559 struct cdrom_tochdr header;
2560 int ret;
2561
2562 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2563
2564 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2565 return -ENOSYS;
2566 if (copy_from_user(&header, argp, sizeof(header)))
2567 return -EFAULT;
2568
2569 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2570 if (ret)
2571 return ret;
2572
2573 if (copy_to_user(argp, &header, sizeof(header)))
2574 return -EFAULT;
2575 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2576 return 0;
2577}
2578
2579static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2580 void __user *argp)
2581{
2582 struct cdrom_tocentry entry;
2583 u8 requested_format;
2584 int ret;
2585
2586 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2587
2588 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2589 return -ENOSYS;
2590 if (copy_from_user(&entry, argp, sizeof(entry)))
2591 return -EFAULT;
2592
2593 requested_format = entry.cdte_format;
2594 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2595 return -EINVAL;
2596 /* make interface to low-level uniform */
2597 entry.cdte_format = CDROM_MSF;
2598 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2599 if (ret)
2600 return ret;
2601 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2602
2603 if (copy_to_user(argp, &entry, sizeof(entry)))
2604 return -EFAULT;
2605 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2606 return 0;
2607}
2608
2609static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2610 void __user *argp)
2611{
2612 struct cdrom_msf msf;
2613
2614 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2615
2616 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2617 return -ENOSYS;
2618 if (copy_from_user(&msf, argp, sizeof(msf)))
2619 return -EFAULT;
2620 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2621}
2622
2623static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2624 void __user *argp)
2625{
2626 struct cdrom_ti ti;
2627 int ret;
2628
2629 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2630
2631 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2632 return -ENOSYS;
2633 if (copy_from_user(&ti, argp, sizeof(ti)))
2634 return -EFAULT;
2635
2636 ret = check_for_audio_disc(cdi, cdi->ops);
2637 if (ret)
2638 return ret;
2639 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2640}
2641static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2642 void __user *argp)
2643{
2644 struct cdrom_volctrl volume;
2645
2646 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2647
2648 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2649 return -ENOSYS;
2650 if (copy_from_user(&volume, argp, sizeof(volume)))
2651 return -EFAULT;
2652 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2653}
2654
2655static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2656 void __user *argp)
2657{
2658 struct cdrom_volctrl volume;
2659 int ret;
2660
2661 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2662
2663 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2664 return -ENOSYS;
2665
2666 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2667 if (ret)
2668 return ret;
2669
2670 if (copy_to_user(argp, &volume, sizeof(volume)))
2671 return -EFAULT;
2672 return 0;
2673}
2674
2675static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2676 unsigned int cmd)
2677{
2678 int ret;
2679
2680 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2681
2682 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2683 return -ENOSYS;
2684 ret = check_for_audio_disc(cdi, cdi->ops);
2685 if (ret)
2686 return ret;
2687 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2688}
2689
2690/*
2691 * Just about every imaginable ioctl is supported in the Uniform layer
2692 * these days.
2693 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2694 */
2695int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2696 struct inode *ip, unsigned int cmd, unsigned long arg)
2697{
2698 void __user *argp = (void __user *)arg;
2699 int ret;
45e79a3a 2700 struct gendisk *disk = ip->i_bdev->bd_disk;
d2c5d4fc
CH		 2701
2702 /*
2703 * Try the generic SCSI command ioctl's first.
2704 */
45e79a3a 2705 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp);
d2c5d4fc
CH		 2706 if (ret != -ENOTTY)
2707 return ret;
2708
2709 switch (cmd) {
2710 case CDROMMULTISESSION:
2711 return cdrom_ioctl_multisession(cdi, argp);
2712 case CDROMEJECT:
2713 return cdrom_ioctl_eject(cdi);
2714 case CDROMCLOSETRAY:
2715 return cdrom_ioctl_closetray(cdi);
2716 case CDROMEJECT_SW:
2717 return cdrom_ioctl_eject_sw(cdi, arg);
2718 case CDROM_MEDIA_CHANGED:
2719 return cdrom_ioctl_media_changed(cdi, arg);
2720 case CDROM_SET_OPTIONS:
2721 return cdrom_ioctl_set_options(cdi, arg);
2722 case CDROM_CLEAR_OPTIONS:
2723 return cdrom_ioctl_clear_options(cdi, arg);
2724 case CDROM_SELECT_SPEED:
2725 return cdrom_ioctl_select_speed(cdi, arg);
2726 case CDROM_SELECT_DISC:
2727 return cdrom_ioctl_select_disc(cdi, arg);
2728 case CDROMRESET:
2729 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2730 case CDROM_LOCKDOOR:
2731 return cdrom_ioctl_lock_door(cdi, arg);
2732 case CDROM_DEBUG:
2733 return cdrom_ioctl_debug(cdi, arg);
2734 case CDROM_GET_CAPABILITY:
2735 return cdrom_ioctl_get_capability(cdi);
2736 case CDROM_GET_MCN:
2737 return cdrom_ioctl_get_mcn(cdi, argp);
2738 case CDROM_DRIVE_STATUS:
2739 return cdrom_ioctl_drive_status(cdi, arg);
2740 case CDROM_DISC_STATUS:
2741 return cdrom_ioctl_disc_status(cdi);
2742 case CDROM_CHANGER_NSLOTS:
2743 return cdrom_ioctl_changer_nslots(cdi);
2744 }
2745
2746 /*
2747 * Use the ioctls that are implemented through the generic_packet()
2748 * interface. this may look at bit funny, but if -ENOTTY is
2749 * returned that particular ioctl is not implemented and we
2750 * let it go through the device specific ones.
2751 */
1da177e4
LT		 2752 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2753 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2754 if (ret != -ENOTTY)
1da177e4 2755 return ret;
1da177e4
LT		 2756 }
2757
d2c5d4fc
CH		 2758 /*
2759 * Note: most of the cdinfo() calls are commented out here,
2760 * because they fill up the sys log when CD players poll
2761 * the drive.
2762 */
1da177e4 2763 switch (cmd) {
d2c5d4fc
CH		 2764 case CDROMSUBCHNL:
2765 return cdrom_ioctl_get_subchnl(cdi, argp);
2766 case CDROMREADTOCHDR:
2767 return cdrom_ioctl_read_tochdr(cdi, argp);
2768 case CDROMREADTOCENTRY:
2769 return cdrom_ioctl_read_tocentry(cdi, argp);
2770 case CDROMPLAYMSF:
2771 return cdrom_ioctl_play_msf(cdi, argp);
2772 case CDROMPLAYTRKIND:
2773 return cdrom_ioctl_play_trkind(cdi, argp);
2774 case CDROMVOLCTRL:
2775 return cdrom_ioctl_volctrl(cdi, argp);
2776 case CDROMVOLREAD:
2777 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2778 case CDROMSTART:
2779 case CDROMSTOP:
2780 case CDROMPAUSE:
d2c5d4fc
CH		 2781 case CDROMRESUME:
2782 return cdrom_ioctl_audioctl(cdi, cmd);
2783 }
1da177e4 2784
1da177e4
LT		 2785 return -ENOSYS;
2786}
2787
1da177e4
LT		 2788/*
2789 * Required when we need to use READ_10 to issue other than 2048 block
2790 * reads
2791 */
2792static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2793{
2794 struct cdrom_device_ops *cdo = cdi->ops;
2795 struct packet_command cgc;
2796 struct modesel_head mh;
2797
2798 memset(&mh, 0, sizeof(mh));
2799 mh.block_desc_length = 0x08;
2800 mh.block_length_med = (size >> 8) & 0xff;
2801 mh.block_length_lo = size & 0xff;
2802
2803 memset(&cgc, 0, sizeof(cgc));
2804 cgc.cmd[0] = 0x15;
2805 cgc.cmd[1] = 1 << 4;
2806 cgc.cmd[4] = 12;
2807 cgc.buflen = sizeof(mh);
2808 cgc.buffer = (char *) &mh;
2809 cgc.data_direction = CGC_DATA_WRITE;
2810 mh.block_desc_length = 0x08;
2811 mh.block_length_med = (size >> 8) & 0xff;
2812 mh.block_length_lo = size & 0xff;
2813
2814 return cdo->generic_packet(cdi, &cgc);
2815}
2816
2817static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2818 unsigned long arg)
2819{
2820 struct cdrom_device_ops *cdo = cdi->ops;
2821 struct packet_command cgc;
2822 struct request_sense sense;
2823 unsigned char buffer[32];
2824 int ret = 0;
2825
2826 memset(&cgc, 0, sizeof(cgc));
2827
2828 /* build a unified command and queue it through
2829 cdo->generic_packet() */
2830 switch (cmd) {
2831 case CDROMREADRAW:
2832 case CDROMREADMODE1:
2833 case CDROMREADMODE2: {
2834 struct cdrom_msf msf;
2835 int blocksize = 0, format = 0, lba;
2836
2837 switch (cmd) {
2838 case CDROMREADRAW:
2839 blocksize = CD_FRAMESIZE_RAW;
2840 break;
2841 case CDROMREADMODE1:
2842 blocksize = CD_FRAMESIZE;
2843 format = 2;
2844 break;
2845 case CDROMREADMODE2:
2846 blocksize = CD_FRAMESIZE_RAW0;
2847 break;
2848 }
2849 IOCTL_IN(arg, struct cdrom_msf, msf);
2850 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2851 /* FIXME: we need upper bound checking, too!! */
2852 if (lba < 0)
2853 return -EINVAL;
5cbded58 2854 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
1da177e4
LT		 2855 if (cgc.buffer == NULL)
2856 return -ENOMEM;
2857 memset(&sense, 0, sizeof(sense));
2858 cgc.sense = &sense;
2859 cgc.data_direction = CGC_DATA_READ;
2860 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2861 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2862 /*
2863 * SCSI-II devices are not required to support
2864 * READ_CD, so let's try switching block size
2865 */
2866 /* FIXME: switch back again... */
2867 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2868 kfree(cgc.buffer);
2869 return ret;
2870 }
2871 cgc.sense = NULL;
2872 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2873 ret |= cdrom_switch_blocksize(cdi, blocksize);
2874 }
2875 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2876 ret = -EFAULT;
2877 kfree(cgc.buffer);
2878 return ret;
2879 }
2880 case CDROMREADAUDIO: {
2881 struct cdrom_read_audio ra;
2882 int lba;
2883
2884 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2885
2886 if (ra.addr_format == CDROM_MSF)
2887 lba = msf_to_lba(ra.addr.msf.minute,
2888 ra.addr.msf.second,
2889 ra.addr.msf.frame);
2890 else if (ra.addr_format == CDROM_LBA)
2891 lba = ra.addr.lba;
2892 else
2893 return -EINVAL;
2894
2895 /* FIXME: we need upper bound checking, too!! */
2896 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2897 return -EINVAL;
2898
2899 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2900 }
2901 case CDROMSUBCHNL: {
2902 struct cdrom_subchnl q;
2903 u_char requested, back;
2904 IOCTL_IN(arg, struct cdrom_subchnl, q);
2905 requested = q.cdsc_format;
2906 if (!((requested == CDROM_MSF) ||
2907 (requested == CDROM_LBA)))
2908 return -EINVAL;
2909 q.cdsc_format = CDROM_MSF;
2910 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2911 return ret;
2912 back = q.cdsc_format; /* local copy */
2913 sanitize_format(&q.cdsc_absaddr, &back, requested);
2914 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2915 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2916 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2917 return 0;
2918 }
2919 case CDROMPLAYMSF: {
2920 struct cdrom_msf msf;
2921 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2922 IOCTL_IN(arg, struct cdrom_msf, msf);
2923 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2924 cgc.cmd[3] = msf.cdmsf_min0;
2925 cgc.cmd[4] = msf.cdmsf_sec0;
2926 cgc.cmd[5] = msf.cdmsf_frame0;
2927 cgc.cmd[6] = msf.cdmsf_min1;
2928 cgc.cmd[7] = msf.cdmsf_sec1;
2929 cgc.cmd[8] = msf.cdmsf_frame1;
2930 cgc.data_direction = CGC_DATA_NONE;
2931 return cdo->generic_packet(cdi, &cgc);
2932 }
2933 case CDROMPLAYBLK: {
2934 struct cdrom_blk blk;
2935 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2936 IOCTL_IN(arg, struct cdrom_blk, blk);
2937 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2938 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2939 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2940 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2941 cgc.cmd[5] = blk.from & 0xff;
2942 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2943 cgc.cmd[8] = blk.len & 0xff;
2944 cgc.data_direction = CGC_DATA_NONE;
2945 return cdo->generic_packet(cdi, &cgc);
2946 }
2947 case CDROMVOLCTRL:
2948 case CDROMVOLREAD: {
2949 struct cdrom_volctrl volctrl;
2950 char mask[sizeof(buffer)];
2951 unsigned short offset;
2952
2953 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2954
2955 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2956
2957 cgc.buffer = buffer;
2958 cgc.buflen = 24;
2959 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2960 return ret;
2961
2962 /* originally the code depended on buffer[1] to determine
2963 how much data is available for transfer. buffer[1] is
2964 unfortunately ambigious and the only reliable way seem
2965 to be to simply skip over the block descriptor... */
56052d52 2966 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
1da177e4
LT		 2967
2968 if (offset + 16 > sizeof(buffer))
2969 return -E2BIG;
2970
2971 if (offset + 16 > cgc.buflen) {
2972 cgc.buflen = offset+16;
2973 ret = cdrom_mode_sense(cdi, &cgc,
2974 GPMODE_AUDIO_CTL_PAGE, 0);
2975 if (ret)
2976 return ret;
2977 }
2978
2979 /* sanity check */
2980 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2981 buffer[offset+1] < 14)
2982 return -EINVAL;
2983
2984 /* now we have the current volume settings. if it was only
2985 a CDROMVOLREAD, return these values */
2986 if (cmd == CDROMVOLREAD) {
2987 volctrl.channel0 = buffer[offset+9];
2988 volctrl.channel1 = buffer[offset+11];
2989 volctrl.channel2 = buffer[offset+13];
2990 volctrl.channel3 = buffer[offset+15];
2991 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2992 return 0;
2993 }
2994
2995 /* get the volume mask */
2996 cgc.buffer = mask;
2997 if ((ret = cdrom_mode_sense(cdi, &cgc,
2998 GPMODE_AUDIO_CTL_PAGE, 1)))
2999 return ret;
3000
3001 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
3002 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
3003 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
3004 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
3005
3006 /* set volume */
3007 cgc.buffer = buffer + offset - 8;
3008 memset(cgc.buffer, 0, 8);
3009 return cdrom_mode_select(cdi, &cgc);
3010 }
3011
3012 case CDROMSTART:
3013 case CDROMSTOP: {
3014 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3015 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
3016 cgc.cmd[1] = 1;
3017 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3018 cgc.data_direction = CGC_DATA_NONE;
3019 return cdo->generic_packet(cdi, &cgc);
3020 }
3021
3022 case CDROMPAUSE:
3023 case CDROMRESUME: {
3024 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3025 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3026 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3027 cgc.data_direction = CGC_DATA_NONE;
3028 return cdo->generic_packet(cdi, &cgc);
3029 }
3030
3031 case DVD_READ_STRUCT: {
3032 dvd_struct *s;
3033 int size = sizeof(dvd_struct);
3034 if (!CDROM_CAN(CDC_DVD))
3035 return -ENOSYS;
5cbded58 3036 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 3037 return -ENOMEM;
3038 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3039 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3040 kfree(s);
3041 return -EFAULT;
3042 }
3043 if ((ret = dvd_read_struct(cdi, s))) {
3044 kfree(s);
3045 return ret;
3046 }
3047 if (copy_to_user((dvd_struct __user *)arg, s, size))
3048 ret = -EFAULT;
3049 kfree(s);
3050 return ret;
3051 }
3052
3053 case DVD_AUTH: {
3054 dvd_authinfo ai;
3055 if (!CDROM_CAN(CDC_DVD))
3056 return -ENOSYS;
3057 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3058 IOCTL_IN(arg, dvd_authinfo, ai);
3059 if ((ret = dvd_do_auth (cdi, &ai)))
3060 return ret;
3061 IOCTL_OUT(arg, dvd_authinfo, ai);
3062 return 0;
3063 }
3064
3065 case CDROM_NEXT_WRITABLE: {
3066 long next = 0;
3067 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3068 if ((ret = cdrom_get_next_writable(cdi, &next)))
3069 return ret;
3070 IOCTL_OUT(arg, long, next);
3071 return 0;
3072 }
3073 case CDROM_LAST_WRITTEN: {
3074 long last = 0;
3075 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3076 if ((ret = cdrom_get_last_written(cdi, &last)))
3077 return ret;
3078 IOCTL_OUT(arg, long, last);
3079 return 0;
3080 }
3081 } /* switch */
3082
3083 return -ENOTTY;
3084}
3085
3086static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3087 track_information *ti)
3088{
3089 struct cdrom_device_ops *cdo = cdi->ops;
3090 struct packet_command cgc;
3091 int ret, buflen;
3092
3093 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3094 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3095 cgc.cmd[1] = type & 3;
3096 cgc.cmd[4] = (track & 0xff00) >> 8;
3097 cgc.cmd[5] = track & 0xff;
3098 cgc.cmd[8] = 8;
3099 cgc.quiet = 1;
3100
3101 if ((ret = cdo->generic_packet(cdi, &cgc)))
3102 return ret;
3103
3104 buflen = be16_to_cpu(ti->track_information_length) +
3105 sizeof(ti->track_information_length);
3106
3107 if (buflen > sizeof(track_information))
3108 buflen = sizeof(track_information);
3109
3110 cgc.cmd[8] = cgc.buflen = buflen;
3111 if ((ret = cdo->generic_packet(cdi, &cgc)))
3112 return ret;
3113
3114 /* return actual fill size */
3115 return buflen;
3116}
3117
3118/* requires CD R/RW */
3119static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3120{
3121 struct cdrom_device_ops *cdo = cdi->ops;
3122 struct packet_command cgc;
3123 int ret, buflen;
3124
3125 /* set up command and get the disc info */
3126 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3127 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3128 cgc.cmd[8] = cgc.buflen = 2;
3129 cgc.quiet = 1;
3130
3131 if ((ret = cdo->generic_packet(cdi, &cgc)))
3132 return ret;
3133
3134 /* not all drives have the same disc_info length, so requeue
3135 * packet with the length the drive tells us it can supply
3136 */
3137 buflen = be16_to_cpu(di->disc_information_length) +
3138 sizeof(di->disc_information_length);
3139
3140 if (buflen > sizeof(disc_information))
3141 buflen = sizeof(disc_information);
3142
3143 cgc.cmd[8] = cgc.buflen = buflen;
3144 if ((ret = cdo->generic_packet(cdi, &cgc)))
3145 return ret;
3146
3147 /* return actual fill size */
3148 return buflen;
3149}
3150
3151/* return the last written block on the CD-R media. this is for the udf
3152 file system. */
3153int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3154{
3155 struct cdrom_tocentry toc;
3156 disc_information di;
3157 track_information ti;
3158 __u32 last_track;
3159 int ret = -1, ti_size;
3160
3161 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3162 goto use_toc;
3163
3164 ret = cdrom_get_disc_info(cdi, &di);
3165 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3166 + sizeof(di.last_track_lsb)))
3167 goto use_toc;
3168
3169 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3170 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3171 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3172 if (ti_size < (int)offsetof(typeof(ti), track_start))
3173 goto use_toc;
3174
3175 /* if this track is blank, try the previous. */
3176 if (ti.blank) {
3177 if (last_track==1)
3178 goto use_toc;
3179 last_track--;
3180 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3181 }
3182
3183 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3184 + sizeof(ti.track_size)))
3185 goto use_toc;
3186
3187 /* if last recorded field is valid, return it. */
3188 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3189 + sizeof(ti.last_rec_address))) {
3190 *last_written = be32_to_cpu(ti.last_rec_address);
3191 } else {
3192 /* make it up instead */
3193 *last_written = be32_to_cpu(ti.track_start) +
3194 be32_to_cpu(ti.track_size);
3195 if (ti.free_blocks)
3196 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3197 }
3198 return 0;
3199
3200 /* this is where we end up if the drive either can't do a
3201 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3202 it doesn't give enough information or fails. then we return
3203 the toc contents. */
3204use_toc:
3205 toc.cdte_format = CDROM_MSF;
3206 toc.cdte_track = CDROM_LEADOUT;
3207 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3208 return ret;
3209 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3210 *last_written = toc.cdte_addr.lba;
3211 return 0;
3212}
3213
3214/* return the next writable block. also for udf file system. */
3215static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3216{
3217 disc_information di;
3218 track_information ti;
3219 __u16 last_track;
3220 int ret, ti_size;
3221
3222 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3223 goto use_last_written;
3224
3225 ret = cdrom_get_disc_info(cdi, &di);
3226 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3227 + sizeof(di.last_track_lsb))
3228 goto use_last_written;
3229
3230 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3231 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3232 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3233 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3234 goto use_last_written;
3235
3236 /* if this track is blank, try the previous. */
3237 if (ti.blank) {
3238 if (last_track == 1)
3239 goto use_last_written;
3240 last_track--;
3241 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3242 if (ti_size < 0)
3243 goto use_last_written;
3244 }
3245
3246 /* if next recordable address field is valid, use it. */
3247 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3248 + sizeof(ti.next_writable)) {
3249 *next_writable = be32_to_cpu(ti.next_writable);
3250 return 0;
3251 }
3252
3253use_last_written:
3254 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3255 *next_writable = 0;
3256 return ret;
3257 } else {
3258 *next_writable += 7;
3259 return 0;
3260 }
3261}
3262
3263EXPORT_SYMBOL(cdrom_get_last_written);
3264EXPORT_SYMBOL(register_cdrom);
3265EXPORT_SYMBOL(unregister_cdrom);
3266EXPORT_SYMBOL(cdrom_open);
3267EXPORT_SYMBOL(cdrom_release);
3268EXPORT_SYMBOL(cdrom_ioctl);
3269EXPORT_SYMBOL(cdrom_media_changed);
3270EXPORT_SYMBOL(cdrom_number_of_slots);
3271EXPORT_SYMBOL(cdrom_mode_select);
3272EXPORT_SYMBOL(cdrom_mode_sense);
3273EXPORT_SYMBOL(init_cdrom_command);
3274EXPORT_SYMBOL(cdrom_get_media_event);
3275
3276#ifdef CONFIG_SYSCTL
3277
3278#define CDROM_STR_SIZE 1000
3279
3280static struct cdrom_sysctl_settings {
3281 char info[CDROM_STR_SIZE]; /* general info */
3282 int autoclose; /* close tray upon mount, etc */
3283 int autoeject; /* eject on umount */
3284 int debug; /* turn on debugging messages */
3285 int lock; /* lock the door on device open */
3286 int check; /* check media type */
3287} cdrom_sysctl_settings;
3288
554988d6
DY		 3289enum cdrom_print_option {
3290 CTL_NAME,
3291 CTL_SPEED,
3292 CTL_SLOTS,
3293 CTL_CAPABILITY
3294};
3295
3296static int cdrom_print_info(const char *header, int val, char *info,
3297 int *pos, enum cdrom_print_option option)
3298{
3299 const int max_size = sizeof(cdrom_sysctl_settings.info);
3300 struct cdrom_device_info *cdi;
3301 int ret;
3302
3303 ret = scnprintf(info + *pos, max_size - *pos, header);
3304 if (!ret)
3305 return 1;
3306
3307 *pos += ret;
3308
3309 for (cdi = topCdromPtr; cdi; cdi = cdi->next) {
3310 switch (option) {
3311 case CTL_NAME:
3312 ret = scnprintf(info + *pos, max_size - *pos,
3313 "\t%s", cdi->name);
3314 break;
3315 case CTL_SPEED:
3316 ret = scnprintf(info + *pos, max_size - *pos,
3317 "\t%d", cdi->speed);
3318 break;
3319 case CTL_SLOTS:
3320 ret = scnprintf(info + *pos, max_size - *pos,
3321 "\t%d", cdi->capacity);
3322 break;
3323 case CTL_CAPABILITY:
3324 ret = scnprintf(info + *pos, max_size - *pos,
3325 "\t%d", CDROM_CAN(val) != 0);
3326 break;
3327 default:
3328 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3329 return 1;
3330 }
3331 if (!ret)
3332 return 1;
3333 *pos += ret;
3334 }
3335
3336 return 0;
3337}
3338
1da177e4
LT		 3339static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3340 void __user *buffer, size_t *lenp, loff_t *ppos)
3341{
554988d6 3342 int pos;
1da177e4 3343 char *info = cdrom_sysctl_settings.info;
554988d6 3344 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3345
3346 if (!*lenp || (*ppos && !write)) {
3347 *lenp = 0;
3348 return 0;
3349 }
3350
554988d6
DY		 3351 mutex_lock(&cdrom_mutex);
3352
1da177e4
LT		 3353 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3354
554988d6
DY		 3355 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3356 goto done;
3357 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3358 goto done;
3359 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3360 goto done;
3361 if (cdrom_print_info("\nCan close tray:\t",
3362 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3363 goto done;
3364 if (cdrom_print_info("\nCan open tray:\t",
3365 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3366 goto done;
3367 if (cdrom_print_info("\nCan lock tray:\t",
3368 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3369 goto done;
3370 if (cdrom_print_info("\nCan change speed:",
3371 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3372 goto done;
3373 if (cdrom_print_info("\nCan select disk:",
3374 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3375 goto done;
3376 if (cdrom_print_info("\nCan read multisession:",
3377 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3378 goto done;
3379 if (cdrom_print_info("\nCan read MCN:\t",
3380 CDC_MCN, info, &pos, CTL_CAPABILITY))
3381 goto done;
3382 if (cdrom_print_info("\nReports media changed:",
3383 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3384 goto done;
3385 if (cdrom_print_info("\nCan play audio:\t",
3386 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3387 goto done;
3388 if (cdrom_print_info("\nCan write CD-R:\t",
3389 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3390 goto done;
3391 if (cdrom_print_info("\nCan write CD-RW:",
3392 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3393 goto done;
3394 if (cdrom_print_info("\nCan read DVD:\t",
3395 CDC_DVD, info, &pos, CTL_CAPABILITY))
3396 goto done;
3397 if (cdrom_print_info("\nCan write DVD-R:",
3398 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3399 goto done;
3400 if (cdrom_print_info("\nCan write DVD-RAM:",
3401 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3402 goto done;
3403 if (cdrom_print_info("\nCan read MRW:\t",
3404 CDC_MRW, info, &pos, CTL_CAPABILITY))
3405 goto done;
3406 if (cdrom_print_info("\nCan write MRW:\t",
3407 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3408 goto done;
3409 if (cdrom_print_info("\nCan write RAM:\t",
3410 CDC_RAM, info, &pos, CTL_CAPABILITY))
3411 goto done;
3412 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3413 goto done;
3414doit:
3415 mutex_unlock(&cdrom_mutex);
3416 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3417done:
3418 printk(KERN_INFO "cdrom: info buffer too small\n");
3419 goto doit;
1da177e4
LT		 3420}
3421
3422/* Unfortunately, per device settings are not implemented through
3423 procfs/sysctl yet. When they are, this will naturally disappear. For now
3424 just update all drives. Later this will become the template on which
3425 new registered drives will be based. */
3426static void cdrom_update_settings(void)
3427{
3428 struct cdrom_device_info *cdi;
3429
032d8d90 3430 mutex_lock(&cdrom_mutex);
1da177e4
LT		 3431 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
3432 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3433 cdi->options |= CDO_AUTO_CLOSE;
3434 else if (!autoclose)
3435 cdi->options &= ~CDO_AUTO_CLOSE;
3436 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3437 cdi->options |= CDO_AUTO_EJECT;
3438 else if (!autoeject)
3439 cdi->options &= ~CDO_AUTO_EJECT;
3440 if (lockdoor && CDROM_CAN(CDC_LOCK))
3441 cdi->options |= CDO_LOCK;
3442 else if (!lockdoor)
3443 cdi->options &= ~CDO_LOCK;
3444 if (check_media_type)
3445 cdi->options |= CDO_CHECK_TYPE;
3446 else
3447 cdi->options &= ~CDO_CHECK_TYPE;
3448 }
032d8d90 3449 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3450}
3451
3452static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3453 void __user *buffer, size_t *lenp, loff_t *ppos)
3454{
1da177e4
LT		 3455 int ret;
3456
3457 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3458
06489b4e 3459 if (write) {
1da177e4
LT		 3460
3461 /* we only care for 1 or 0. */
06489b4e
EB		 3462 autoclose = !!cdrom_sysctl_settings.autoclose;
3463 autoeject = !!cdrom_sysctl_settings.autoeject;
3464 debug = !!cdrom_sysctl_settings.debug;
3465 lockdoor = !!cdrom_sysctl_settings.lock;
3466 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3467
1da177e4
LT		 3468 /* update the option flags according to the changes. we
3469 don't have per device options through sysctl yet,
3470 but we will have and then this will disappear. */
3471 cdrom_update_settings();
3472 }
3473
3474 return ret;
3475}
3476
3477/* Place files in /proc/sys/dev/cdrom */
3478static ctl_table cdrom_table[] = {
3479 {
1da177e4
LT		 3480 .procname = "info",
3481 .data = &cdrom_sysctl_settings.info,
3482 .maxlen = CDROM_STR_SIZE,
3483 .mode = 0444,
3484 .proc_handler = &cdrom_sysctl_info,
3485 },
3486 {
1da177e4
LT		 3487 .procname = "autoclose",
3488 .data = &cdrom_sysctl_settings.autoclose,
3489 .maxlen = sizeof(int),
3490 .mode = 0644,
3491 .proc_handler = &cdrom_sysctl_handler,
3492 },
3493 {
1da177e4
LT		 3494 .procname = "autoeject",
3495 .data = &cdrom_sysctl_settings.autoeject,
3496 .maxlen = sizeof(int),
3497 .mode = 0644,
3498 .proc_handler = &cdrom_sysctl_handler,
3499 },
3500 {
1da177e4
LT		 3501 .procname = "debug",
3502 .data = &cdrom_sysctl_settings.debug,
3503 .maxlen = sizeof(int),
3504 .mode = 0644,
3505 .proc_handler = &cdrom_sysctl_handler,
3506 },
3507 {
1da177e4
LT		 3508 .procname = "lock",
3509 .data = &cdrom_sysctl_settings.lock,
3510 .maxlen = sizeof(int),
3511 .mode = 0644,
3512 .proc_handler = &cdrom_sysctl_handler,
3513 },
3514 {
1da177e4
LT		 3515 .procname = "check_media",
3516 .data = &cdrom_sysctl_settings.check,
3517 .maxlen = sizeof(int),
3518 .mode = 0644,
3519 .proc_handler = &cdrom_sysctl_handler
3520 },
3521 { .ctl_name = 0 }
3522};
3523
3524static ctl_table cdrom_cdrom_table[] = {
3525 {
3526 .ctl_name = DEV_CDROM,
3527 .procname = "cdrom",
3528 .maxlen = 0,
3529 .mode = 0555,
3530 .child = cdrom_table,
3531 },
3532 { .ctl_name = 0 }
3533};
3534
3535/* Make sure that /proc/sys/dev is there */
3536static ctl_table cdrom_root_table[] = {
3537 {
3538 .ctl_name = CTL_DEV,
3539 .procname = "dev",
3540 .maxlen = 0,
3541 .mode = 0555,
3542 .child = cdrom_cdrom_table,
3543 },
3544 { .ctl_name = 0 }
3545};
3546static struct ctl_table_header *cdrom_sysctl_header;
3547
3548static void cdrom_sysctl_register(void)
3549{
3550 static int initialized;
3551
3552 if (initialized == 1)
3553 return;
3554
0b4d4147 3555 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3556
3557 /* set the defaults */
3558 cdrom_sysctl_settings.autoclose = autoclose;
3559 cdrom_sysctl_settings.autoeject = autoeject;
3560 cdrom_sysctl_settings.debug = debug;
3561 cdrom_sysctl_settings.lock = lockdoor;
3562 cdrom_sysctl_settings.check = check_media_type;
3563
3564 initialized = 1;
3565}
3566
3567static void cdrom_sysctl_unregister(void)
3568{
3569 if (cdrom_sysctl_header)
3570 unregister_sysctl_table(cdrom_sysctl_header);
3571}
3572
17672cf0
AM		 3573#else /* CONFIG_SYSCTL */
3574
3575static void cdrom_sysctl_register(void)
3576{
3577}
3578
3579static void cdrom_sysctl_unregister(void)
3580{
3581}
3582
1da177e4
LT		 3583#endif /* CONFIG_SYSCTL */
3584
3585static int __init cdrom_init(void)
3586{
1da177e4 3587 cdrom_sysctl_register();
17672cf0 3588
1da177e4
LT		 3589 return 0;
3590}
3591
3592static void __exit cdrom_exit(void)
3593{
3594 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
1da177e4 3595 cdrom_sysctl_unregister();
1da177e4
LT		 3596}
3597
3598module_init(cdrom_init);
3599module_exit(cdrom_exit);
3600MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)