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cdrom: use list_head for cdrom_device_info list
[deliverable/linux.git] / drivers / cdrom / cdrom.c
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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
7fd097d4 365static LIST_HEAD(cdrom_list);
1da177e4
LT		 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);
7fd097d4 439 list_add(&cdi->list, &cdrom_list);
554988d6 440 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 441 return 0;
442}
443#undef ENSURE
444
7fd097d4 445int unregister_cdrom(struct cdrom_device_info *cdi)
1da177e4 446{
1da177e4
LT		 447 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
448
554988d6 449 mutex_lock(&cdrom_mutex);
7fd097d4 450 list_del(&cdi->list);
554988d6 451 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 452
453 if (cdi->exit)
454 cdi->exit(cdi);
455
456 cdi->ops->n_minors--;
457 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
458 return 0;
459}
460
461int cdrom_get_media_event(struct cdrom_device_info *cdi,
462 struct media_event_desc *med)
463{
464 struct packet_command cgc;
465 unsigned char buffer[8];
466 struct event_header *eh = (struct event_header *) buffer;
467
468 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
469 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
470 cgc.cmd[1] = 1; /* IMMED */
471 cgc.cmd[4] = 1 << 4; /* media event */
472 cgc.cmd[8] = sizeof(buffer);
473 cgc.quiet = 1;
474
475 if (cdi->ops->generic_packet(cdi, &cgc))
476 return 1;
477
478 if (be16_to_cpu(eh->data_len) < sizeof(*med))
479 return 1;
480
481 if (eh->nea || eh->notification_class != 0x4)
482 return 1;
483
484 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
485 return 0;
486}
487
488/*
489 * the first prototypes used 0x2c as the page code for the mrw mode page,
490 * subsequently this was changed to 0x03. probe the one used by this drive
491 */
492static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
493{
494 struct packet_command cgc;
495 char buffer[16];
496
497 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
498
499 cgc.timeout = HZ;
500 cgc.quiet = 1;
501
502 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
503 cdi->mrw_mode_page = MRW_MODE_PC;
504 return 0;
505 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
506 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
507 return 0;
508 }
509
510 return 1;
511}
512
513static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
514{
515 struct packet_command cgc;
516 struct mrw_feature_desc *mfd;
517 unsigned char buffer[16];
518 int ret;
519
520 *write = 0;
521
522 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
523
524 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
525 cgc.cmd[3] = CDF_MRW;
526 cgc.cmd[8] = sizeof(buffer);
527 cgc.quiet = 1;
528
529 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
530 return ret;
531
532 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
533 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
534 return 1;
535 *write = mfd->write;
536
537 if ((ret = cdrom_mrw_probe_pc(cdi))) {
538 *write = 0;
539 return ret;
540 }
541
542 return 0;
543}
544
545static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
546{
547 struct packet_command cgc;
548 unsigned char buffer[12];
549 int ret;
550
551 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
552
553 /*
554 * FmtData bit set (bit 4), format type is 1
555 */
556 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
557 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
558 cgc.cmd[1] = (1 << 4) | 1;
559
560 cgc.timeout = 5 * 60 * HZ;
561
562 /*
563 * 4 byte format list header, 8 byte format list descriptor
564 */
565 buffer[1] = 1 << 1;
566 buffer[3] = 8;
567
568 /*
569 * nr_blocks field
570 */
571 buffer[4] = 0xff;
572 buffer[5] = 0xff;
573 buffer[6] = 0xff;
574 buffer[7] = 0xff;
575
576 buffer[8] = 0x24 << 2;
577 buffer[11] = cont;
578
579 ret = cdi->ops->generic_packet(cdi, &cgc);
580 if (ret)
581 printk(KERN_INFO "cdrom: bgformat failed\n");
582
583 return ret;
584}
585
586static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
587{
588 struct packet_command cgc;
589
590 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
591 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
592
593 /*
594 * Session = 1, Track = 0
595 */
596 cgc.cmd[1] = !!immed;
597 cgc.cmd[2] = 1 << 1;
598
599 cgc.timeout = 5 * 60 * HZ;
600
601 return cdi->ops->generic_packet(cdi, &cgc);
602}
603
604static int cdrom_flush_cache(struct cdrom_device_info *cdi)
605{
606 struct packet_command cgc;
607
608 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
609 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
610
611 cgc.timeout = 5 * 60 * HZ;
612
613 return cdi->ops->generic_packet(cdi, &cgc);
614}
615
616static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
617{
618 disc_information di;
619 int ret;
620
621 ret = cdrom_get_disc_info(cdi, &di);
622 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
623 return 1;
624
625 ret = 0;
626 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
627 printk(KERN_INFO "cdrom: issuing MRW back ground "
628 "format suspend\n");
629 ret = cdrom_mrw_bgformat_susp(cdi, 0);
630 }
631
7da21a02 632 if (!ret && cdi->media_written)
1da177e4
LT		 633 ret = cdrom_flush_cache(cdi);
634
635 return ret;
636}
637
638static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
639{
640 struct packet_command cgc;
641 struct mode_page_header *mph;
642 char buffer[16];
643 int ret, offset, size;
644
645 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
646
647 cgc.buffer = buffer;
648 cgc.buflen = sizeof(buffer);
649
650 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
651 return ret;
652
653 mph = (struct mode_page_header *) buffer;
654 offset = be16_to_cpu(mph->desc_length);
655 size = be16_to_cpu(mph->mode_data_length) + 2;
656
657 buffer[offset + 3] = space;
658 cgc.buflen = size;
659
660 if ((ret = cdrom_mode_select(cdi, &cgc)))
661 return ret;
662
663 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
664 return 0;
665}
666
667static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
668 struct rwrt_feature_desc *rfd)
669{
670 struct packet_command cgc;
671 char buffer[24];
672 int ret;
673
674 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
675
676 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
677 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
678 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
679 cgc.quiet = 1;
680
681 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
682 return ret;
683
684 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
685 return 0;
686}
687
688static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
689{
690 struct packet_command cgc;
691 char buffer[16];
56052d52 692 __be16 *feature_code;
1da177e4
LT		 693 int ret;
694
695 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
696
697 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
698 cgc.cmd[3] = CDF_HWDM;
699 cgc.cmd[8] = sizeof(buffer);
700 cgc.quiet = 1;
701
702 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
703 return ret;
704
56052d52 705 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4
LT		 706 if (be16_to_cpu(*feature_code) == CDF_HWDM)
707 return 0;
708
709 return 1;
710}
711
712
713static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
714{
715 struct rwrt_feature_desc rfd;
716 int ret;
717
718 *write = 0;
719
720 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
721 return ret;
722
723 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
724 *write = 1;
725
726 return 0;
727}
728
729static int cdrom_media_erasable(struct cdrom_device_info *cdi)
730{
731 disc_information di;
732 int ret;
733
734 ret = cdrom_get_disc_info(cdi, &di);
735 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
736 return -1;
737
738 return di.erasable;
739}
740
741/*
742 * FIXME: check RO bit
743 */
744static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
745{
746 int ret = cdrom_media_erasable(cdi);
747
748 /*
749 * allow writable open if media info read worked and media is
750 * erasable, _or_ if it fails since not all drives support it
751 */
752 if (!ret)
753 return 1;
754
755 return 0;
756}
757
758static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
759{
760 disc_information di;
761 int ret;
762
763 /*
764 * always reset to DMA lba space on open
765 */
766 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
767 printk(KERN_ERR "cdrom: failed setting lba address space\n");
768 return 1;
769 }
770
771 ret = cdrom_get_disc_info(cdi, &di);
772 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
773 return 1;
774
775 if (!di.erasable)
776 return 1;
777
778 /*
779 * mrw_status
780 * 0 - not MRW formatted
781 * 1 - MRW bgformat started, but not running or complete
782 * 2 - MRW bgformat in progress
783 * 3 - MRW formatting complete
784 */
785 ret = 0;
786 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
787 mrw_format_status[di.mrw_status]);
788 if (!di.mrw_status)
789 ret = 1;
790 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
791 mrw_format_restart)
792 ret = cdrom_mrw_bgformat(cdi, 1);
793
794 return ret;
795}
796
797static int mo_open_write(struct cdrom_device_info *cdi)
798{
799 struct packet_command cgc;
800 char buffer[255];
801 int ret;
802
803 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
804 cgc.quiet = 1;
805
806 /*
807 * obtain write protect information as per
808 * drivers/scsi/sd.c:sd_read_write_protect_flag
809 */
810
811 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
812 if (ret)
813 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
814 if (ret) {
815 cgc.buflen = 255;
816 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
817 }
818
819 /* drive gave us no info, let the user go ahead */
820 if (ret)
821 return 0;
822
823 return buffer[3] & 0x80;
824}
825
826static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
827{
828 struct rwrt_feature_desc rfd;
829 int ret;
830
831 if ((ret = cdrom_has_defect_mgt(cdi)))
832 return ret;
833
834 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
835 return ret;
836 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
837 ret = !rfd.curr;
838
839 cdinfo(CD_OPEN, "can open for random write\n");
840 return ret;
841}
842
843static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
844{
845 struct packet_command cgc;
846 char buffer[32];
847 int ret, mmc3_profile;
848
849 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
850
851 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
852 cgc.cmd[1] = 0;
853 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
854 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
855 cgc.quiet = 1;
856
857 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
858 mmc3_profile = 0xffff;
859 else
860 mmc3_profile = (buffer[6] << 8) | buffer[7];
861
862 cdi->mmc3_profile = mmc3_profile;
863}
864
865static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
866{
867 switch (cdi->mmc3_profile) {
868 case 0x12: /* DVD-RAM */
869 case 0x1A: /* DVD+RW */
870 return 0;
871 default:
872 return 1;
873 }
874}
875
876/*
877 * returns 0 for ok to open write, non-0 to disallow
878 */
879static int cdrom_open_write(struct cdrom_device_info *cdi)
880{
881 int mrw, mrw_write, ram_write;
882 int ret = 1;
883
884 mrw = 0;
885 if (!cdrom_is_mrw(cdi, &mrw_write))
886 mrw = 1;
887
888 if (CDROM_CAN(CDC_MO_DRIVE))
889 ram_write = 1;
890 else
891 (void) cdrom_is_random_writable(cdi, &ram_write);
892
893 if (mrw)
894 cdi->mask &= ~CDC_MRW;
895 else
896 cdi->mask |= CDC_MRW;
897
898 if (mrw_write)
899 cdi->mask &= ~CDC_MRW_W;
900 else
901 cdi->mask |= CDC_MRW_W;
902
903 if (ram_write)
904 cdi->mask &= ~CDC_RAM;
905 else
906 cdi->mask |= CDC_RAM;
907
908 if (CDROM_CAN(CDC_MRW_W))
909 ret = cdrom_mrw_open_write(cdi);
910 else if (CDROM_CAN(CDC_DVD_RAM))
911 ret = cdrom_dvdram_open_write(cdi);
912 else if (CDROM_CAN(CDC_RAM) &&
913 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
914 ret = cdrom_ram_open_write(cdi);
915 else if (CDROM_CAN(CDC_MO_DRIVE))
916 ret = mo_open_write(cdi);
917 else if (!cdrom_is_dvd_rw(cdi))
918 ret = 0;
919
920 return ret;
921}
922
923static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
924{
925 struct packet_command cgc;
926
927 if (cdi->mmc3_profile != 0x1a) {
928 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
929 return;
930 }
931
932 if (!cdi->media_written) {
933 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
934 return;
935 }
936
937 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
938 cdi->name);
939
940 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
941 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
942 cgc.timeout = 30*HZ;
943 cdi->ops->generic_packet(cdi, &cgc);
944
945 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
946 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
947 cgc.timeout = 3000*HZ;
948 cgc.quiet = 1;
949 cdi->ops->generic_packet(cdi, &cgc);
950
951 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
952 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
953 cgc.cmd[2] = 2; /* Close session */
954 cgc.quiet = 1;
955 cgc.timeout = 3000*HZ;
956 cdi->ops->generic_packet(cdi, &cgc);
957
958 cdi->media_written = 0;
959}
960
961static int cdrom_close_write(struct cdrom_device_info *cdi)
962{
963#if 0
964 return cdrom_flush_cache(cdi);
965#else
966 return 0;
967#endif
968}
969
970/* We use the open-option O_NONBLOCK to indicate that the
971 * purpose of opening is only for subsequent ioctl() calls; no device
972 * integrity checks are performed.
973 *
974 * We hope that all cd-player programs will adopt this convention. It
975 * is in their own interest: device control becomes a lot easier
976 * this way.
977 */
978int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
979{
980 int ret;
981
982 cdinfo(CD_OPEN, "entering cdrom_open\n");
983
984 /* if this was a O_NONBLOCK open and we should honor the flags,
985 * do a quick open without drive/disc integrity checks. */
986 cdi->use_count++;
987 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
988 ret = cdi->ops->open(cdi, 1);
989 } else {
990 ret = open_for_data(cdi);
991 if (ret)
992 goto err;
993 cdrom_mmc3_profile(cdi);
994 if (fp->f_mode & FMODE_WRITE) {
995 ret = -EROFS;
996 if (cdrom_open_write(cdi))
16070428 997 goto err_release;
1da177e4 998 if (!CDROM_CAN(CDC_RAM))
16070428 999 goto err_release;
1da177e4
LT		 1000 ret = 0;
1001 cdi->media_written = 0;
1002 }
1003 }
1004
1005 if (ret)
1006 goto err;
1007
1008 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1009 cdi->name, cdi->use_count);
1010 /* Do this on open. Don't wait for mount, because they might
1011 not be mounting, but opening with O_NONBLOCK */
1012 check_disk_change(ip->i_bdev);
1013 return 0;
16070428 1014err_release:
ae3ba4fd
AV		 1015 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1016 cdi->ops->lock_door(cdi, 0);
1017 cdinfo(CD_OPEN, "door unlocked.\n");
1018 }
16070428 1019 cdi->ops->release(cdi);
1da177e4
LT		 1020err:
1021 cdi->use_count--;
1022 return ret;
1023}
1024
1025static
1026int open_for_data(struct cdrom_device_info * cdi)
1027{
1028 int ret;
1029 struct cdrom_device_ops *cdo = cdi->ops;
1030 tracktype tracks;
1031 cdinfo(CD_OPEN, "entering open_for_data\n");
1032 /* Check if the driver can report drive status. If it can, we
1033 can do clever things. If it can't, well, we at least tried! */
1034 if (cdo->drive_status != NULL) {
1035 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1036 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1037 if (ret == CDS_TRAY_OPEN) {
1038 cdinfo(CD_OPEN, "the tray is open...\n");
1039 /* can/may i close it? */
1040 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1041 cdi->options & CDO_AUTO_CLOSE) {
1042 cdinfo(CD_OPEN, "trying to close the tray.\n");
1043 ret=cdo->tray_move(cdi,0);
1044 if (ret) {
1045 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1046 /* Ignore the error from the low
1047 level driver. We don't care why it
1048 couldn't close the tray. We only care
1049 that there is no disc in the drive,
1050 since that is the _REAL_ problem here.*/
1051 ret=-ENOMEDIUM;
1052 goto clean_up_and_return;
1053 }
1054 } else {
1055 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1056 ret=-ENOMEDIUM;
1057 goto clean_up_and_return;
1058 }
1059 /* Ok, the door should be closed now.. Check again */
1060 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1061 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1062 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1063 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1064 ret=-ENOMEDIUM;
1065 goto clean_up_and_return;
1066 }
1067 cdinfo(CD_OPEN, "the tray is now closed.\n");
1068 }
1069 /* the door should be closed now, check for the disc */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if (ret!=CDS_DISC_OK) {
1072 ret = -ENOMEDIUM;
1073 goto clean_up_and_return;
1074 }
1075 }
1076 cdrom_count_tracks(cdi, &tracks);
1077 if (tracks.error == CDS_NO_DISC) {
1078 cdinfo(CD_OPEN, "bummer. no disc.\n");
1079 ret=-ENOMEDIUM;
1080 goto clean_up_and_return;
1081 }
1082 /* CD-Players which don't use O_NONBLOCK, workman
1083 * for example, need bit CDO_CHECK_TYPE cleared! */
1084 if (tracks.data==0) {
1085 if (cdi->options & CDO_CHECK_TYPE) {
1086 /* give people a warning shot, now that CDO_CHECK_TYPE
1087 is the default case! */
1088 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1089 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
ba25f9dc 1090 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1091 ret=-EMEDIUMTYPE;
1092 goto clean_up_and_return;
1093 }
1094 else {
1095 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1096 }
1097 }
1098
1099 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1100
1101 /* all seems well, we can open the device */
1102 ret = cdo->open(cdi, 0); /* open for data */
1103 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1104 /* After all this careful checking, we shouldn't have problems
1105 opening the device, but we don't want the device locked if
1106 this somehow fails... */
1107 if (ret) {
1108 cdinfo(CD_OPEN, "open device failed.\n");
1109 goto clean_up_and_return;
1110 }
1111 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1112 cdo->lock_door(cdi, 1);
1113 cdinfo(CD_OPEN, "door locked.\n");
1114 }
1115 cdinfo(CD_OPEN, "device opened successfully.\n");
1116 return ret;
1117
1118 /* Something failed. Try to unlock the drive, because some drivers
1119 (notably ide-cd) lock the drive after every command. This produced
1120 a nasty bug where after mount failed, the drive would remain locked!
1121 This ensures that the drive gets unlocked after a mount fails. This
1122 is a goto to avoid bloating the driver with redundant code. */
1123clean_up_and_return:
00d6da9b 1124 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1125 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1126 cdo->lock_door(cdi, 0);
1127 cdinfo(CD_OPEN, "door unlocked.\n");
1128 }
1129 return ret;
1130}
1131
1132/* This code is similar to that in open_for_data. The routine is called
1133 whenever an audio play operation is requested.
1134*/
ecb80c6a
AB		 1135static int check_for_audio_disc(struct cdrom_device_info * cdi,
1136 struct cdrom_device_ops * cdo)
1da177e4
LT		 1137{
1138 int ret;
1139 tracktype tracks;
1140 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1141 if (!(cdi->options & CDO_CHECK_TYPE))
1142 return 0;
1143 if (cdo->drive_status != NULL) {
1144 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1145 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1146 if (ret == CDS_TRAY_OPEN) {
1147 cdinfo(CD_OPEN, "the tray is open...\n");
1148 /* can/may i close it? */
1149 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1150 cdi->options & CDO_AUTO_CLOSE) {
1151 cdinfo(CD_OPEN, "trying to close the tray.\n");
1152 ret=cdo->tray_move(cdi,0);
1153 if (ret) {
1154 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1155 /* Ignore the error from the low
1156 level driver. We don't care why it
1157 couldn't close the tray. We only care
1158 that there is no disc in the drive,
1159 since that is the _REAL_ problem here.*/
1160 return -ENOMEDIUM;
1161 }
1162 } else {
1163 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1164 return -ENOMEDIUM;
1165 }
1166 /* Ok, the door should be closed now.. Check again */
1167 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1168 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1169 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1170 return -ENOMEDIUM;
1171 }
1172 if (ret!=CDS_DISC_OK) {
1173 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1174 return -EIO;
1175 }
1176 cdinfo(CD_OPEN, "the tray is now closed.\n");
1177 }
1178 }
1179 cdrom_count_tracks(cdi, &tracks);
1180 if (tracks.error)
1181 return(tracks.error);
1182
1183 if (tracks.audio==0)
1184 return -EMEDIUMTYPE;
1185
1186 return 0;
1187}
1188
1da177e4
LT		 1189int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1190{
1191 struct cdrom_device_ops *cdo = cdi->ops;
1192 int opened_for_data;
1193
35841f70 1194 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1195
1196 if (cdi->use_count > 0)
1197 cdi->use_count--;
35841f70
BP		 1198
1199 if (cdi->use_count == 0) {
1da177e4 1200 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1da177e4 1201 cdrom_dvd_rw_close_write(cdi);
35841f70
BP		 1202
1203 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1204 cdinfo(CD_CLOSE, "Unlocking door!\n");
1205 cdo->lock_door(cdi, 0);
1206 }
1da177e4 1207 }
35841f70 1208
1da177e4
LT		 1209 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1210 !(fp && fp->f_flags & O_NONBLOCK);
1211
1212 /*
1213 * flush cache on last write release
1214 */
1215 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1216 cdrom_close_write(cdi);
1217
1218 cdo->release(cdi);
1219 if (cdi->use_count == 0) { /* last process that closes dev*/
1220 if (opened_for_data &&
1221 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1222 cdo->tray_move(cdi, 1);
1223 }
1224 return 0;
1225}
1226
1227static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1228 struct cdrom_changer_info *buf)
1229{
1230 struct packet_command cgc;
1231 struct cdrom_device_ops *cdo = cdi->ops;
1232 int length;
1233
1234 /*
1235 * Sanyo changer isn't spec compliant (doesn't use regular change
1236 * LOAD_UNLOAD command, and it doesn't implement the mech status
1237 * command below
1238 */
1239 if (cdi->sanyo_slot) {
1240 buf->hdr.nslots = 3;
1241 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1242 for (length = 0; length < 3; length++) {
1243 buf->slots[length].disc_present = 1;
1244 buf->slots[length].change = 0;
1245 }
1246 return 0;
1247 }
1248
1249 length = sizeof(struct cdrom_mechstat_header) +
1250 cdi->capacity * sizeof(struct cdrom_slot);
1251
1252 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1253 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1254 cgc.cmd[8] = (length >> 8) & 0xff;
1255 cgc.cmd[9] = length & 0xff;
1256 return cdo->generic_packet(cdi, &cgc);
1257}
1258
1259static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1260{
1261 struct cdrom_changer_info *info;
1262 int ret;
1263
1264 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1265 if (cdi->sanyo_slot)
1266 return CDS_NO_INFO;
1267
1268 info = kmalloc(sizeof(*info), GFP_KERNEL);
1269 if (!info)
1270 return -ENOMEM;
1271
1272 if ((ret = cdrom_read_mech_status(cdi, info)))
1273 goto out_free;
1274
1275 if (info->slots[slot].disc_present)
1276 ret = CDS_DISC_OK;
1277 else
1278 ret = CDS_NO_DISC;
1279
1280out_free:
1281 kfree(info);
1282 return ret;
1283}
1284
1285/* Return the number of slots for an ATAPI/SCSI cdrom,
1286 * return 1 if not a changer.
1287 */
1288int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1289{
1290 int status;
1291 int nslots = 1;
1292 struct cdrom_changer_info *info;
1293
1294 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1295 /* cdrom_read_mech_status requires a valid value for capacity: */
1296 cdi->capacity = 0;
1297
1298 info = kmalloc(sizeof(*info), GFP_KERNEL);
1299 if (!info)
1300 return -ENOMEM;
1301
1302 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1303 nslots = info->hdr.nslots;
1304
1305 kfree(info);
1306 return nslots;
1307}
1308
1309
1310/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1311static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1312{
1313 struct packet_command cgc;
1314
1315 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1316 if (cdi->sanyo_slot && slot < 0)
1317 return 0;
1318
1319 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1320 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1321 cgc.cmd[4] = 2 + (slot >= 0);
1322 cgc.cmd[8] = slot;
1323 cgc.timeout = 60 * HZ;
1324
1325 /* The Sanyo 3 CD changer uses byte 7 of the
1326 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1327 using the GPCMD_LOAD_UNLOAD opcode. */
1328 if (cdi->sanyo_slot && -1 < slot) {
1329 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1330 cgc.cmd[7] = slot;
1331 cgc.cmd[4] = cgc.cmd[8] = 0;
1332 cdi->sanyo_slot = slot ? slot : 3;
1333 }
1334
1335 return cdi->ops->generic_packet(cdi, &cgc);
1336}
1337
1338static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1339{
1340 struct cdrom_changer_info *info;
1341 int curslot;
1342 int ret;
1343
1344 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1345 if (!CDROM_CAN(CDC_SELECT_DISC))
1346 return -EDRIVE_CANT_DO_THIS;
1347
1348 (void) cdi->ops->media_changed(cdi, slot);
1349
1350 if (slot == CDSL_NONE) {
1351 /* set media changed bits, on both queues */
1352 cdi->mc_flags = 0x3;
1353 return cdrom_load_unload(cdi, -1);
1354 }
1355
1356 info = kmalloc(sizeof(*info), GFP_KERNEL);
1357 if (!info)
1358 return -ENOMEM;
1359
1360 if ((ret = cdrom_read_mech_status(cdi, info))) {
1361 kfree(info);
1362 return ret;
1363 }
1364
1365 curslot = info->hdr.curslot;
1366 kfree(info);
1367
1368 if (cdi->use_count > 1 || keeplocked) {
1369 if (slot == CDSL_CURRENT) {
1370 return curslot;
1371 } else {
1372 return -EBUSY;
1373 }
1374 }
1375
1376 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1377 which is useful if it had been previously unloaded.
1378 Whether it can or not, it returns the current slot.
1379 Similarly, if slot happens to be the current one, we still
1380 try and load it. */
1381 if (slot == CDSL_CURRENT)
1382 slot = curslot;
1383
1384 /* set media changed bits on both queues */
1385 cdi->mc_flags = 0x3;
1386 if ((ret = cdrom_load_unload(cdi, slot)))
1387 return ret;
1388
1389 return slot;
1390}
1391
1392/* We want to make media_changed accessible to the user through an
1393 * ioctl. The main problem now is that we must double-buffer the
1394 * low-level implementation, to assure that the VFS and the user both
1395 * see a medium change once.
1396 */
1397
1398static
1399int media_changed(struct cdrom_device_info *cdi, int queue)
1400{
1401 unsigned int mask = (1 << (queue & 1));
1402 int ret = !!(cdi->mc_flags & mask);
1403
1404 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1405 return ret;
1406 /* changed since last call? */
1407 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1408 cdi->mc_flags = 0x3; /* set bit on both queues */
1409 ret |= 1;
1410 cdi->media_written = 0;
1411 }
1412 cdi->mc_flags &= ~mask; /* clear bit */
1413 return ret;
1414}
1415
1416int cdrom_media_changed(struct cdrom_device_info *cdi)
1417{
1418 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1419 * Returning "0" is always safe (media hasn't been changed). Do that
1420 * if the low-level cdrom driver dosn't support media changed. */
1421 if (cdi == NULL || cdi->ops->media_changed == NULL)
1422 return 0;
1423 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1424 return 0;
1425 return media_changed(cdi, 0);
1426}
1427
1428/* badly broken, I know. Is due for a fixup anytime. */
1429static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1430{
1431 struct cdrom_tochdr header;
1432 struct cdrom_tocentry entry;
1433 int ret, i;
1434 tracks->data=0;
1435 tracks->audio=0;
1436 tracks->cdi=0;
1437 tracks->xa=0;
1438 tracks->error=0;
1439 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1440 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1441 tracks->error=CDS_NO_INFO;
1442 return;
1443 }
1444 /* Grab the TOC header so we can see how many tracks there are */
1445 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1446 if (ret == -ENOMEDIUM)
1447 tracks->error = CDS_NO_DISC;
1448 else
1449 tracks->error = CDS_NO_INFO;
1450 return;
1451 }
1452 /* check what type of tracks are on this disc */
1453 entry.cdte_format = CDROM_MSF;
1454 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1455 entry.cdte_track = i;
1456 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1457 tracks->error=CDS_NO_INFO;
1458 return;
1459 }
1460 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1461 if (entry.cdte_format == 0x10)
1462 tracks->cdi++;
1463 else if (entry.cdte_format == 0x20)
1464 tracks->xa++;
1465 else
1466 tracks->data++;
1467 } else
1468 tracks->audio++;
1469 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1470 i, entry.cdte_format, entry.cdte_ctrl);
1471 }
1472 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1473 header.cdth_trk1, tracks->audio, tracks->data,
1474 tracks->cdi, tracks->xa);
1475}
1476
1477/* Requests to the low-level drivers will /always/ be done in the
1478 following format convention:
1479
1480 CDROM_LBA: all data-related requests.
1481 CDROM_MSF: all audio-related requests.
1482
1483 However, a low-level implementation is allowed to refuse this
1484 request, and return information in its own favorite format.
1485
1486 It doesn't make sense /at all/ to ask for a play_audio in LBA
1487 format, or ask for multi-session info in MSF format. However, for
1488 backward compatibility these format requests will be satisfied, but
1489 the requests to the low-level drivers will be sanitized in the more
1490 meaningful format indicated above.
1491 */
1492
1493static
1494void sanitize_format(union cdrom_addr *addr,
1495 u_char * curr, u_char requested)
1496{
1497 if (*curr == requested)
1498 return; /* nothing to be done! */
1499 if (requested == CDROM_LBA) {
1500 addr->lba = (int) addr->msf.frame +
1501 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1502 } else { /* CDROM_MSF */
1503 int lba = addr->lba;
1504 addr->msf.frame = lba % 75;
1505 lba /= 75;
1506 lba += 2;
1507 addr->msf.second = lba % 60;
1508 addr->msf.minute = lba / 60;
1509 }
1510 *curr = requested;
1511}
1512
1513void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1514 int type)
1515{
1516 memset(cgc, 0, sizeof(struct packet_command));
1517 if (buf)
1518 memset(buf, 0, len);
1519 cgc->buffer = (char *) buf;
1520 cgc->buflen = len;
1521 cgc->data_direction = type;
2e11c207 1522 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1523}
1524
1525/* DVD handling */
1526
1527#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1528#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1529
1530static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1531{
1532 cgc->cmd[0] = GPCMD_REPORT_KEY;
1533 cgc->cmd[10] = type | (agid << 6);
1534 switch (type) {
1535 case 0: case 8: case 5: {
1536 cgc->buflen = 8;
1537 break;
1538 }
1539 case 1: {
1540 cgc->buflen = 16;
1541 break;
1542 }
1543 case 2: case 4: {
1544 cgc->buflen = 12;
1545 break;
1546 }
1547 }
1548 cgc->cmd[9] = cgc->buflen;
1549 cgc->data_direction = CGC_DATA_READ;
1550}
1551
1552static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1553{
1554 cgc->cmd[0] = GPCMD_SEND_KEY;
1555 cgc->cmd[10] = type | (agid << 6);
1556 switch (type) {
1557 case 1: {
1558 cgc->buflen = 16;
1559 break;
1560 }
1561 case 3: {
1562 cgc->buflen = 12;
1563 break;
1564 }
1565 case 6: {
1566 cgc->buflen = 8;
1567 break;
1568 }
1569 }
1570 cgc->cmd[9] = cgc->buflen;
1571 cgc->data_direction = CGC_DATA_WRITE;
1572}
1573
1574static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1575{
1576 int ret;
1577 u_char buf[20];
1578 struct packet_command cgc;
1579 struct cdrom_device_ops *cdo = cdi->ops;
1580 rpc_state_t rpc_state;
1581
1582 memset(buf, 0, sizeof(buf));
1583 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1584
1585 switch (ai->type) {
1586 /* LU data send */
1587 case DVD_LU_SEND_AGID:
1588 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1589 cgc.quiet = 1;
1590 setup_report_key(&cgc, ai->lsa.agid, 0);
1591
1592 if ((ret = cdo->generic_packet(cdi, &cgc)))
1593 return ret;
1594
1595 ai->lsa.agid = buf[7] >> 6;
1596 /* Returning data, let host change state */
1597 break;
1598
1599 case DVD_LU_SEND_KEY1:
1600 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1601 setup_report_key(&cgc, ai->lsk.agid, 2);
1602
1603 if ((ret = cdo->generic_packet(cdi, &cgc)))
1604 return ret;
1605
1606 copy_key(ai->lsk.key, &buf[4]);
1607 /* Returning data, let host change state */
1608 break;
1609
1610 case DVD_LU_SEND_CHALLENGE:
1611 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1612 setup_report_key(&cgc, ai->lsc.agid, 1);
1613
1614 if ((ret = cdo->generic_packet(cdi, &cgc)))
1615 return ret;
1616
1617 copy_chal(ai->lsc.chal, &buf[4]);
1618 /* Returning data, let host change state */
1619 break;
1620
1621 /* Post-auth key */
1622 case DVD_LU_SEND_TITLE_KEY:
1623 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1624 cgc.quiet = 1;
1625 setup_report_key(&cgc, ai->lstk.agid, 4);
1626 cgc.cmd[5] = ai->lstk.lba;
1627 cgc.cmd[4] = ai->lstk.lba >> 8;
1628 cgc.cmd[3] = ai->lstk.lba >> 16;
1629 cgc.cmd[2] = ai->lstk.lba >> 24;
1630
1631 if ((ret = cdo->generic_packet(cdi, &cgc)))
1632 return ret;
1633
1634 ai->lstk.cpm = (buf[4] >> 7) & 1;
1635 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1636 ai->lstk.cgms = (buf[4] >> 4) & 3;
1637 copy_key(ai->lstk.title_key, &buf[5]);
1638 /* Returning data, let host change state */
1639 break;
1640
1641 case DVD_LU_SEND_ASF:
1642 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1643 setup_report_key(&cgc, ai->lsasf.agid, 5);
1644
1645 if ((ret = cdo->generic_packet(cdi, &cgc)))
1646 return ret;
1647
1648 ai->lsasf.asf = buf[7] & 1;
1649 break;
1650
1651 /* LU data receive (LU changes state) */
1652 case DVD_HOST_SEND_CHALLENGE:
1653 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1654 setup_send_key(&cgc, ai->hsc.agid, 1);
1655 buf[1] = 0xe;
1656 copy_chal(&buf[4], ai->hsc.chal);
1657
1658 if ((ret = cdo->generic_packet(cdi, &cgc)))
1659 return ret;
1660
1661 ai->type = DVD_LU_SEND_KEY1;
1662 break;
1663
1664 case DVD_HOST_SEND_KEY2:
1665 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1666 setup_send_key(&cgc, ai->hsk.agid, 3);
1667 buf[1] = 0xa;
1668 copy_key(&buf[4], ai->hsk.key);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1671 ai->type = DVD_AUTH_FAILURE;
1672 return ret;
1673 }
1674 ai->type = DVD_AUTH_ESTABLISHED;
1675 break;
1676
1677 /* Misc */
1678 case DVD_INVALIDATE_AGID:
1679 cgc.quiet = 1;
1680 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1681 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1682 if ((ret = cdo->generic_packet(cdi, &cgc)))
1683 return ret;
1684 break;
1685
1686 /* Get region settings */
1687 case DVD_LU_SEND_RPC_STATE:
1688 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1689 setup_report_key(&cgc, 0, 8);
1690 memset(&rpc_state, 0, sizeof(rpc_state_t));
1691 cgc.buffer = (char *) &rpc_state;
1692
1693 if ((ret = cdo->generic_packet(cdi, &cgc)))
1694 return ret;
1695
1696 ai->lrpcs.type = rpc_state.type_code;
1697 ai->lrpcs.vra = rpc_state.vra;
1698 ai->lrpcs.ucca = rpc_state.ucca;
1699 ai->lrpcs.region_mask = rpc_state.region_mask;
1700 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1701 break;
1702
1703 /* Set region settings */
1704 case DVD_HOST_SEND_RPC_STATE:
1705 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1706 setup_send_key(&cgc, 0, 6);
1707 buf[1] = 6;
1708 buf[4] = ai->hrpcs.pdrc;
1709
1710 if ((ret = cdo->generic_packet(cdi, &cgc)))
1711 return ret;
1712 break;
1713
1714 default:
1715 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1716 return -ENOTTY;
1717 }
1718
1719 return 0;
1720}
1721
1722static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1723{
1724 unsigned char buf[21], *base;
1725 struct dvd_layer *layer;
1726 struct packet_command cgc;
1727 struct cdrom_device_ops *cdo = cdi->ops;
1728 int ret, layer_num = s->physical.layer_num;
1729
1730 if (layer_num >= DVD_LAYERS)
1731 return -EINVAL;
1732
1733 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1734 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1735 cgc.cmd[6] = layer_num;
1736 cgc.cmd[7] = s->type;
1737 cgc.cmd[9] = cgc.buflen & 0xff;
1738
1739 /*
1740 * refrain from reporting errors on non-existing layers (mainly)
1741 */
1742 cgc.quiet = 1;
1743
1744 if ((ret = cdo->generic_packet(cdi, &cgc)))
1745 return ret;
1746
1747 base = &buf[4];
1748 layer = &s->physical.layer[layer_num];
1749
1750 /*
1751 * place the data... really ugly, but at least we won't have to
1752 * worry about endianess in userspace.
1753 */
1754 memset(layer, 0, sizeof(*layer));
1755 layer->book_version = base[0] & 0xf;
1756 layer->book_type = base[0] >> 4;
1757 layer->min_rate = base[1] & 0xf;
1758 layer->disc_size = base[1] >> 4;
1759 layer->layer_type = base[2] & 0xf;
1760 layer->track_path = (base[2] >> 4) & 1;
1761 layer->nlayers = (base[2] >> 5) & 3;
1762 layer->track_density = base[3] & 0xf;
1763 layer->linear_density = base[3] >> 4;
1764 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1765 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1766 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1767 layer->bca = base[16] >> 7;
1768
1769 return 0;
1770}
1771
1772static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1773{
1774 int ret;
1775 u_char buf[8];
1776 struct packet_command cgc;
1777 struct cdrom_device_ops *cdo = cdi->ops;
1778
1779 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1780 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1781 cgc.cmd[6] = s->copyright.layer_num;
1782 cgc.cmd[7] = s->type;
1783 cgc.cmd[8] = cgc.buflen >> 8;
1784 cgc.cmd[9] = cgc.buflen & 0xff;
1785
1786 if ((ret = cdo->generic_packet(cdi, &cgc)))
1787 return ret;
1788
1789 s->copyright.cpst = buf[4];
1790 s->copyright.rmi = buf[5];
1791
1792 return 0;
1793}
1794
1795static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1796{
1797 int ret, size;
1798 u_char *buf;
1799 struct packet_command cgc;
1800 struct cdrom_device_ops *cdo = cdi->ops;
1801
1802 size = sizeof(s->disckey.value) + 4;
1803
5cbded58 1804 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1805 return -ENOMEM;
1806
1807 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1808 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1809 cgc.cmd[7] = s->type;
1810 cgc.cmd[8] = size >> 8;
1811 cgc.cmd[9] = size & 0xff;
1812 cgc.cmd[10] = s->disckey.agid << 6;
1813
1814 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1815 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1816
1817 kfree(buf);
1818 return ret;
1819}
1820
1821static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1822{
1823 int ret;
1824 u_char buf[4 + 188];
1825 struct packet_command cgc;
1826 struct cdrom_device_ops *cdo = cdi->ops;
1827
1828 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1829 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1830 cgc.cmd[7] = s->type;
454d6fbc 1831 cgc.cmd[9] = cgc.buflen & 0xff;
1da177e4
LT		 1832
1833 if ((ret = cdo->generic_packet(cdi, &cgc)))
1834 return ret;
1835
1836 s->bca.len = buf[0] << 8 | buf[1];
1837 if (s->bca.len < 12 || s->bca.len > 188) {
1838 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1839 return -EIO;
1840 }
1841 memcpy(s->bca.value, &buf[4], s->bca.len);
1842
1843 return 0;
1844}
1845
1846static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1847{
1848 int ret = 0, size;
1849 u_char *buf;
1850 struct packet_command cgc;
1851 struct cdrom_device_ops *cdo = cdi->ops;
1852
1853 size = sizeof(s->manufact.value) + 4;
1854
5cbded58 1855 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1856 return -ENOMEM;
1857
1858 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1859 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1860 cgc.cmd[7] = s->type;
1861 cgc.cmd[8] = size >> 8;
1862 cgc.cmd[9] = size & 0xff;
1863
1864 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1865 kfree(buf);
1866 return ret;
1867 }
1868
1869 s->manufact.len = buf[0] << 8 | buf[1];
1870 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1871 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1872 " (%d)\n", s->manufact.len);
1873 ret = -EIO;
1874 } else {
1875 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1876 }
1877
1878 kfree(buf);
1879 return ret;
1880}
1881
1882static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1883{
1884 switch (s->type) {
1885 case DVD_STRUCT_PHYSICAL:
1886 return dvd_read_physical(cdi, s);
1887
1888 case DVD_STRUCT_COPYRIGHT:
1889 return dvd_read_copyright(cdi, s);
1890
1891 case DVD_STRUCT_DISCKEY:
1892 return dvd_read_disckey(cdi, s);
1893
1894 case DVD_STRUCT_BCA:
1895 return dvd_read_bca(cdi, s);
1896
1897 case DVD_STRUCT_MANUFACT:
1898 return dvd_read_manufact(cdi, s);
1899
1900 default:
1901 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1902 s->type);
1903 return -EINVAL;
1904 }
1905}
1906
1907int cdrom_mode_sense(struct cdrom_device_info *cdi,
1908 struct packet_command *cgc,
1909 int page_code, int page_control)
1910{
1911 struct cdrom_device_ops *cdo = cdi->ops;
1912
1913 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1914
1915 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1916 cgc->cmd[2] = page_code | (page_control << 6);
1917 cgc->cmd[7] = cgc->buflen >> 8;
1918 cgc->cmd[8] = cgc->buflen & 0xff;
1919 cgc->data_direction = CGC_DATA_READ;
1920 return cdo->generic_packet(cdi, cgc);
1921}
1922
1923int cdrom_mode_select(struct cdrom_device_info *cdi,
1924 struct packet_command *cgc)
1925{
1926 struct cdrom_device_ops *cdo = cdi->ops;
1927
1928 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1929 memset(cgc->buffer, 0, 2);
1930 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1931 cgc->cmd[1] = 0x10; /* PF */
1932 cgc->cmd[7] = cgc->buflen >> 8;
1933 cgc->cmd[8] = cgc->buflen & 0xff;
1934 cgc->data_direction = CGC_DATA_WRITE;
1935 return cdo->generic_packet(cdi, cgc);
1936}
1937
1938static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1939 struct cdrom_subchnl *subchnl, int mcn)
1940{
1941 struct cdrom_device_ops *cdo = cdi->ops;
1942 struct packet_command cgc;
1943 char buffer[32];
1944 int ret;
1945
1946 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1947 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1948 cgc.cmd[1] = 2; /* MSF addressing */
1949 cgc.cmd[2] = 0x40; /* request subQ data */
1950 cgc.cmd[3] = mcn ? 2 : 1;
1951 cgc.cmd[8] = 16;
1952
1953 if ((ret = cdo->generic_packet(cdi, &cgc)))
1954 return ret;
1955
1956 subchnl->cdsc_audiostatus = cgc.buffer[1];
1957 subchnl->cdsc_format = CDROM_MSF;
1958 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1959 subchnl->cdsc_trk = cgc.buffer[6];
1960 subchnl->cdsc_ind = cgc.buffer[7];
1961
1962 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1963 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1964 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1965 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1966 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1967 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1968
1969 return 0;
1970}
1971
1972/*
1973 * Specific READ_10 interface
1974 */
1975static int cdrom_read_cd(struct cdrom_device_info *cdi,
1976 struct packet_command *cgc, int lba,
1977 int blocksize, int nblocks)
1978{
1979 struct cdrom_device_ops *cdo = cdi->ops;
1980
1981 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1982 cgc->cmd[0] = GPCMD_READ_10;
1983 cgc->cmd[2] = (lba >> 24) & 0xff;
1984 cgc->cmd[3] = (lba >> 16) & 0xff;
1985 cgc->cmd[4] = (lba >> 8) & 0xff;
1986 cgc->cmd[5] = lba & 0xff;
1987 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1988 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1989 cgc->cmd[8] = nblocks & 0xff;
1990 cgc->buflen = blocksize * nblocks;
1991 return cdo->generic_packet(cdi, cgc);
1992}
1993
1994/* very generic interface for reading the various types of blocks */
1995static int cdrom_read_block(struct cdrom_device_info *cdi,
1996 struct packet_command *cgc,
1997 int lba, int nblocks, int format, int blksize)
1998{
1999 struct cdrom_device_ops *cdo = cdi->ops;
2000
2001 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2002 cgc->cmd[0] = GPCMD_READ_CD;
2003 /* expected sector size - cdda,mode1,etc. */
2004 cgc->cmd[1] = format << 2;
2005 /* starting address */
2006 cgc->cmd[2] = (lba >> 24) & 0xff;
2007 cgc->cmd[3] = (lba >> 16) & 0xff;
2008 cgc->cmd[4] = (lba >> 8) & 0xff;
2009 cgc->cmd[5] = lba & 0xff;
2010 /* number of blocks */
2011 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2012 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2013 cgc->cmd[8] = nblocks & 0xff;
2014 cgc->buflen = blksize * nblocks;
2015
2016 /* set the header info returned */
2017 switch (blksize) {
2018 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2019 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2020 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2021 default : cgc->cmd[9] = 0x10;
2022 }
2023
2024 return cdo->generic_packet(cdi, cgc);
2025}
2026
2027static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2028 int lba, int nframes)
2029{
2030 struct packet_command cgc;
2031 int ret = 0;
2032 int nr;
2033
2034 cdi->last_sense = 0;
2035
2036 memset(&cgc, 0, sizeof(cgc));
2037
2038 /*
2039 * start with will ra.nframes size, back down if alloc fails
2040 */
2041 nr = nframes;
2042 do {
2043 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2044 if (cgc.buffer)
2045 break;
2046
2047 nr >>= 1;
2048 } while (nr);
2049
2050 if (!nr)
2051 return -ENOMEM;
2052
2053 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2054 ret = -EFAULT;
2055 goto out;
2056 }
2057
2058 cgc.data_direction = CGC_DATA_READ;
2059 while (nframes > 0) {
2060 if (nr > nframes)
2061 nr = nframes;
2062
2063 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2064 if (ret)
2065 break;
2066 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2067 ret = -EFAULT;
2068 break;
2069 }
2070 ubuf += CD_FRAMESIZE_RAW * nr;
2071 nframes -= nr;
2072 lba += nr;
2073 }
2074out:
2075 kfree(cgc.buffer);
2076 return ret;
2077}
2078
2079static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2080 int lba, int nframes)
2081{
165125e1 2082 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2083 struct request *rq;
2084 struct bio *bio;
2085 unsigned int len;
2086 int nr, ret = 0;
2087
2088 if (!q)
2089 return -ENXIO;
2090
dd1cab95
JA		 2091 rq = blk_get_request(q, READ, GFP_KERNEL);
2092 if (!rq)
2093 return -ENOMEM;
2094
1da177e4
LT		 2095 cdi->last_sense = 0;
2096
2097 while (nframes) {
2098 nr = nframes;
2099 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2100 nr = 1;
2101 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2102 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2103
2104 len = nr * CD_FRAMESIZE_RAW;
2105
dd1cab95
JA		 2106 ret = blk_rq_map_user(q, rq, ubuf, len);
2107 if (ret)
2108 break;
1da177e4
LT		 2109
2110 memset(rq->cmd, 0, sizeof(rq->cmd));
2111 rq->cmd[0] = GPCMD_READ_CD;
2112 rq->cmd[1] = 1 << 2;
2113 rq->cmd[2] = (lba >> 24) & 0xff;
2114 rq->cmd[3] = (lba >> 16) & 0xff;
2115 rq->cmd[4] = (lba >> 8) & 0xff;
2116 rq->cmd[5] = lba & 0xff;
2117 rq->cmd[6] = (nr >> 16) & 0xff;
2118 rq->cmd[7] = (nr >> 8) & 0xff;
2119 rq->cmd[8] = nr & 0xff;
2120 rq->cmd[9] = 0xf8;
2121
2122 rq->cmd_len = 12;
4aff5e23 2123 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2124 rq->timeout = 60 * HZ;
2125 bio = rq->bio;
2126
994ca9a1 2127 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2128 struct request_sense *s = rq->sense;
2129 ret = -EIO;
2130 cdi->last_sense = s->sense_key;
2131 }
2132
8e5cfc45 2133 if (blk_rq_unmap_user(bio))
1da177e4
LT		 2134 ret = -EFAULT;
2135
2136 if (ret)
2137 break;
2138
2139 nframes -= nr;
2140 lba += nr;
2141 ubuf += len;
2142 }
2143
dd1cab95 2144 blk_put_request(rq);
1da177e4
LT		 2145 return ret;
2146}
2147
2148static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2149 int lba, int nframes)
2150{
2151 int ret;
2152
2153 if (cdi->cdda_method == CDDA_OLD)
2154 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2155
2156retry:
2157 /*
2158 * for anything else than success and io error, we need to retry
2159 */
2160 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2161 if (!ret || ret != -EIO)
2162 return ret;
2163
2164 /*
2165 * I've seen drives get sense 4/8/3 udma crc errors on multi
2166 * frame dma, so drop to single frame dma if we need to
2167 */
2168 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2169 printk("cdrom: dropping to single frame dma\n");
2170 cdi->cdda_method = CDDA_BPC_SINGLE;
2171 goto retry;
2172 }
2173
2174 /*
2175 * so we have an io error of some sort with multi frame dma. if the
2176 * condition wasn't a hardware error
2177 * problems, not for any error
2178 */
2179 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2180 return ret;
2181
2182 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2183 cdi->cdda_method = CDDA_OLD;
2184 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2185}
2186
d2c5d4fc
CH		 2187static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2188 void __user *argp)
1da177e4 2189{
d2c5d4fc
CH		 2190 struct cdrom_multisession ms_info;
2191 u8 requested_format;
1da177e4
LT		 2192 int ret;
2193
d2c5d4fc
CH		 2194 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2195
2196 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2197 return -ENOSYS;
2198
2199 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2200 return -EFAULT;
2201
2202 requested_format = ms_info.addr_format;
2203 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2204 return -EINVAL;
2205 ms_info.addr_format = CDROM_LBA;
2206
2207 ret = cdi->ops->get_last_session(cdi, &ms_info);
2208 if (ret)
1da177e4
LT		 2209 return ret;
2210
d2c5d4fc
CH		 2211 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2212
2213 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2214 return -EFAULT;
2215
2216 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2217 return 0;
2218}
2219
2220static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2221{
2222 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2223
2224 if (!CDROM_CAN(CDC_OPEN_TRAY))
2225 return -ENOSYS;
2226 if (cdi->use_count != 1 || keeplocked)
2227 return -EBUSY;
2228 if (CDROM_CAN(CDC_LOCK)) {
2229 int ret = cdi->ops->lock_door(cdi, 0);
2230 if (ret)
1da177e4 2231 return ret;
d2c5d4fc 2232 }
1da177e4 2233
d2c5d4fc
CH		 2234 return cdi->ops->tray_move(cdi, 1);
2235}
1da177e4 2236
d2c5d4fc
CH		 2237static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2238{
2239 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2240
d2c5d4fc
CH		 2241 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2242 return -ENOSYS;
2243 return cdi->ops->tray_move(cdi, 0);
2244}
1da177e4 2245
d2c5d4fc
CH		 2246static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2247 unsigned long arg)
2248{
2249 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2250
d2c5d4fc
CH		 2251 if (!CDROM_CAN(CDC_OPEN_TRAY))
2252 return -ENOSYS;
2253 if (keeplocked)
2254 return -EBUSY;
1da177e4 2255
d2c5d4fc
CH		 2256 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2257 if (arg)
2258 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2259 return 0;
2260}
1da177e4 2261
d2c5d4fc
CH		 2262static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2263 unsigned long arg)
2264{
2265 struct cdrom_changer_info *info;
2266 int ret;
1da177e4 2267
d2c5d4fc 2268 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2269
d2c5d4fc
CH		 2270 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2271 return -ENOSYS;
1da177e4 2272
d2c5d4fc
CH		 2273 /* cannot select disc or select current disc */
2274 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2275 return media_changed(cdi, 1);
1da177e4 2276
d2c5d4fc
CH		 2277 if ((unsigned int)arg >= cdi->capacity)
2278 return -EINVAL;
1da177e4 2279
d2c5d4fc
CH		 2280 info = kmalloc(sizeof(*info), GFP_KERNEL);
2281 if (!info)
2282 return -ENOMEM;
1da177e4 2283
d2c5d4fc
CH		 2284 ret = cdrom_read_mech_status(cdi, info);
2285 if (!ret)
2286 ret = info->slots[arg].change;
2287 kfree(info);
2288 return ret;
2289}
1da177e4 2290
d2c5d4fc
CH		 2291static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2292 unsigned long arg)
2293{
2294 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2295
d2c5d4fc
CH		 2296 /*
2297 * Options need to be in sync with capability.
2298 * Too late for that, so we have to check each one separately.
2299 */
2300 switch (arg) {
2301 case CDO_USE_FFLAGS:
2302 case CDO_CHECK_TYPE:
2303 break;
2304 case CDO_LOCK:
2305 if (!CDROM_CAN(CDC_LOCK))
2306 return -ENOSYS;
2307 break;
2308 case 0:
2309 return cdi->options;
2310 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2311 default:
2312 if (!CDROM_CAN(arg))
1da177e4 2313 return -ENOSYS;
d2c5d4fc
CH		 2314 }
2315 cdi->options |= (int) arg;
2316 return cdi->options;
2317}
1da177e4 2318
d2c5d4fc
CH		 2319static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2320 unsigned long arg)
2321{
2322 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2323
d2c5d4fc
CH		 2324 cdi->options &= ~(int) arg;
2325 return cdi->options;
2326}
1da177e4 2327
d2c5d4fc
CH		 2328static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2329 unsigned long arg)
2330{
2331 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2332
d2c5d4fc
CH		 2333 if (!CDROM_CAN(CDC_SELECT_SPEED))
2334 return -ENOSYS;
2335 return cdi->ops->select_speed(cdi, arg);
2336}
1da177e4 2337
d2c5d4fc
CH		 2338static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2339 unsigned long arg)
2340{
2341 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2342
2343 if (!CDROM_CAN(CDC_SELECT_DISC))
2344 return -ENOSYS;
2345
2346 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2347 if ((int)arg >= cdi->capacity)
2348 return -EINVAL;
2349 }
2350
2351 /*
2352 * ->select_disc is a hook to allow a driver-specific way of
2353 * seleting disc. However, since there is no equivalent hook for
2354 * cdrom_slot_status this may not actually be useful...
2355 */
2356 if (cdi->ops->select_disc)
2357 return cdi->ops->select_disc(cdi, arg);
2358
2359 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2360 return cdrom_select_disc(cdi, arg);
2361}
2362
2363static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2364 struct block_device *bdev)
2365{
2366 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2367
2368 if (!capable(CAP_SYS_ADMIN))
2369 return -EACCES;
2370 if (!CDROM_CAN(CDC_RESET))
2371 return -ENOSYS;
f98393a6 2372 invalidate_bdev(bdev);
d2c5d4fc
CH		 2373 return cdi->ops->reset(cdi);
2374}
2375
2376static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2377 unsigned long arg)
2378{
2379 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2380
2381 if (!CDROM_CAN(CDC_LOCK))
2382 return -EDRIVE_CANT_DO_THIS;
2383
2384 keeplocked = arg ? 1 : 0;
2385
2386 /*
2387 * Don't unlock the door on multiple opens by default, but allow
2388 * root to do so.
2389 */
2390 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2391 return -EBUSY;
2392 return cdi->ops->lock_door(cdi, arg);
2393}
2394
2395static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2396 unsigned long arg)
2397{
2398 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2399
2400 if (!capable(CAP_SYS_ADMIN))
2401 return -EACCES;
2402 debug = arg ? 1 : 0;
2403 return debug;
2404}
1da177e4 2405
d2c5d4fc
CH		 2406static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2407{
2408 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2409 return (cdi->ops->capability & ~cdi->mask);
2410}
2411
2412/*
2413 * The following function is implemented, although very few audio
1da177e4
LT		 2414 * discs give Universal Product Code information, which should just be
2415 * the Medium Catalog Number on the box. Note, that the way the code
2416 * is written on the CD is /not/ uniform across all discs!
2417 */
d2c5d4fc
CH		 2418static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2419 void __user *argp)
2420{
2421 struct cdrom_mcn mcn;
2422 int ret;
1da177e4 2423
d2c5d4fc 2424 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2425
d2c5d4fc
CH		 2426 if (!(cdi->ops->capability & CDC_MCN))
2427 return -ENOSYS;
2428 ret = cdi->ops->get_mcn(cdi, &mcn);
2429 if (ret)
2430 return ret;
1da177e4 2431
d2c5d4fc
CH		 2432 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2433 return -EFAULT;
2434 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2435 return 0;
2436}
1da177e4 2437
d2c5d4fc
CH		 2438static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2439 unsigned long arg)
2440{
2441 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2442
2443 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2444 return -ENOSYS;
2445 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2446 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2447 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2448 if (((int)arg >= cdi->capacity))
2449 return -EINVAL;
2450 return cdrom_slot_status(cdi, arg);
2451}
2452
2453/*
2454 * Ok, this is where problems start. The current interface for the
2455 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2456 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2457 * is often the case, it is also very common for CDs to have some tracks
2458 * with data, and some tracks with audio. Just because I feel like it,
2459 * I declare the following to be the best way to cope. If the CD has ANY
2460 * data tracks on it, it will be returned as a data CD. If it has any XA
2461 * tracks, I will return it as that. Now I could simplify this interface
2462 * by combining these returns with the above, but this more clearly
2463 * demonstrates the problem with the current interface. Too bad this
2464 * wasn't designed to use bitmasks... -Erik
2465 *
2466 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2467 * User level programmers might feel the ioctl is not very useful.
2468 * ---david
2469 */
2470static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2471{
2472 tracktype tracks;
2473
2474 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2475
2476 cdrom_count_tracks(cdi, &tracks);
2477 if (tracks.error)
2478 return tracks.error;
2479
2480 /* Policy mode on */
2481 if (tracks.audio > 0) {
2482 if (!tracks.data && !tracks.cdi && !tracks.xa)
2483 return CDS_AUDIO;
2484 else
2485 return CDS_MIXED;
1da177e4
LT		 2486 }
2487
d2c5d4fc
CH		 2488 if (tracks.cdi > 0)
2489 return CDS_XA_2_2;
2490 if (tracks.xa > 0)
2491 return CDS_XA_2_1;
2492 if (tracks.data > 0)
2493 return CDS_DATA_1;
2494 /* Policy mode off */
2495
2496 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2497 return CDS_NO_INFO;
2498}
2499
2500static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2501{
2502 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2503 return cdi->capacity;
2504}
2505
2506static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2507 void __user *argp)
2508{
2509 struct cdrom_subchnl q;
2510 u8 requested, back;
2511 int ret;
2512
2513 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2514
2515 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2516 return -ENOSYS;
2517 if (copy_from_user(&q, argp, sizeof(q)))
2518 return -EFAULT;
2519
2520 requested = q.cdsc_format;
2521 if (requested != CDROM_MSF && requested != CDROM_LBA)
2522 return -EINVAL;
2523 q.cdsc_format = CDROM_MSF;
2524
2525 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2526 if (ret)
2527 return ret;
2528
2529 back = q.cdsc_format; /* local copy */
2530 sanitize_format(&q.cdsc_absaddr, &back, requested);
2531 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2532
2533 if (copy_to_user(argp, &q, sizeof(q)))
2534 return -EFAULT;
2535 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2536 return 0;
2537}
2538
2539static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2540 void __user *argp)
2541{
2542 struct cdrom_tochdr header;
2543 int ret;
2544
2545 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2546
2547 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2548 return -ENOSYS;
2549 if (copy_from_user(&header, argp, sizeof(header)))
2550 return -EFAULT;
2551
2552 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2553 if (ret)
2554 return ret;
2555
2556 if (copy_to_user(argp, &header, sizeof(header)))
2557 return -EFAULT;
2558 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2559 return 0;
2560}
2561
2562static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2563 void __user *argp)
2564{
2565 struct cdrom_tocentry entry;
2566 u8 requested_format;
2567 int ret;
2568
2569 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2570
2571 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2572 return -ENOSYS;
2573 if (copy_from_user(&entry, argp, sizeof(entry)))
2574 return -EFAULT;
2575
2576 requested_format = entry.cdte_format;
2577 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2578 return -EINVAL;
2579 /* make interface to low-level uniform */
2580 entry.cdte_format = CDROM_MSF;
2581 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2582 if (ret)
2583 return ret;
2584 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2585
2586 if (copy_to_user(argp, &entry, sizeof(entry)))
2587 return -EFAULT;
2588 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2589 return 0;
2590}
2591
2592static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2593 void __user *argp)
2594{
2595 struct cdrom_msf msf;
2596
2597 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2598
2599 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2600 return -ENOSYS;
2601 if (copy_from_user(&msf, argp, sizeof(msf)))
2602 return -EFAULT;
2603 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2604}
2605
2606static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2607 void __user *argp)
2608{
2609 struct cdrom_ti ti;
2610 int ret;
2611
2612 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2613
2614 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2615 return -ENOSYS;
2616 if (copy_from_user(&ti, argp, sizeof(ti)))
2617 return -EFAULT;
2618
2619 ret = check_for_audio_disc(cdi, cdi->ops);
2620 if (ret)
2621 return ret;
2622 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2623}
2624static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2625 void __user *argp)
2626{
2627 struct cdrom_volctrl volume;
2628
2629 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2630
2631 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2632 return -ENOSYS;
2633 if (copy_from_user(&volume, argp, sizeof(volume)))
2634 return -EFAULT;
2635 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2636}
2637
2638static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2639 void __user *argp)
2640{
2641 struct cdrom_volctrl volume;
2642 int ret;
2643
2644 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2645
2646 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2647 return -ENOSYS;
2648
2649 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2650 if (ret)
2651 return ret;
2652
2653 if (copy_to_user(argp, &volume, sizeof(volume)))
2654 return -EFAULT;
2655 return 0;
2656}
2657
2658static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2659 unsigned int cmd)
2660{
2661 int ret;
2662
2663 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2664
2665 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2666 return -ENOSYS;
2667 ret = check_for_audio_disc(cdi, cdi->ops);
2668 if (ret)
2669 return ret;
2670 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2671}
2672
2673/*
2674 * Just about every imaginable ioctl is supported in the Uniform layer
2675 * these days.
2676 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2677 */
2678int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2679 struct inode *ip, unsigned int cmd, unsigned long arg)
2680{
2681 void __user *argp = (void __user *)arg;
2682 int ret;
45e79a3a 2683 struct gendisk *disk = ip->i_bdev->bd_disk;
d2c5d4fc
CH		 2684
2685 /*
2686 * Try the generic SCSI command ioctl's first.
2687 */
45e79a3a 2688 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp);
d2c5d4fc
CH		 2689 if (ret != -ENOTTY)
2690 return ret;
2691
2692 switch (cmd) {
2693 case CDROMMULTISESSION:
2694 return cdrom_ioctl_multisession(cdi, argp);
2695 case CDROMEJECT:
2696 return cdrom_ioctl_eject(cdi);
2697 case CDROMCLOSETRAY:
2698 return cdrom_ioctl_closetray(cdi);
2699 case CDROMEJECT_SW:
2700 return cdrom_ioctl_eject_sw(cdi, arg);
2701 case CDROM_MEDIA_CHANGED:
2702 return cdrom_ioctl_media_changed(cdi, arg);
2703 case CDROM_SET_OPTIONS:
2704 return cdrom_ioctl_set_options(cdi, arg);
2705 case CDROM_CLEAR_OPTIONS:
2706 return cdrom_ioctl_clear_options(cdi, arg);
2707 case CDROM_SELECT_SPEED:
2708 return cdrom_ioctl_select_speed(cdi, arg);
2709 case CDROM_SELECT_DISC:
2710 return cdrom_ioctl_select_disc(cdi, arg);
2711 case CDROMRESET:
2712 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2713 case CDROM_LOCKDOOR:
2714 return cdrom_ioctl_lock_door(cdi, arg);
2715 case CDROM_DEBUG:
2716 return cdrom_ioctl_debug(cdi, arg);
2717 case CDROM_GET_CAPABILITY:
2718 return cdrom_ioctl_get_capability(cdi);
2719 case CDROM_GET_MCN:
2720 return cdrom_ioctl_get_mcn(cdi, argp);
2721 case CDROM_DRIVE_STATUS:
2722 return cdrom_ioctl_drive_status(cdi, arg);
2723 case CDROM_DISC_STATUS:
2724 return cdrom_ioctl_disc_status(cdi);
2725 case CDROM_CHANGER_NSLOTS:
2726 return cdrom_ioctl_changer_nslots(cdi);
2727 }
2728
2729 /*
2730 * Use the ioctls that are implemented through the generic_packet()
2731 * interface. this may look at bit funny, but if -ENOTTY is
2732 * returned that particular ioctl is not implemented and we
2733 * let it go through the device specific ones.
2734 */
1da177e4
LT		 2735 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2736 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2737 if (ret != -ENOTTY)
1da177e4 2738 return ret;
1da177e4
LT		 2739 }
2740
d2c5d4fc
CH		 2741 /*
2742 * Note: most of the cdinfo() calls are commented out here,
2743 * because they fill up the sys log when CD players poll
2744 * the drive.
2745 */
1da177e4 2746 switch (cmd) {
d2c5d4fc
CH		 2747 case CDROMSUBCHNL:
2748 return cdrom_ioctl_get_subchnl(cdi, argp);
2749 case CDROMREADTOCHDR:
2750 return cdrom_ioctl_read_tochdr(cdi, argp);
2751 case CDROMREADTOCENTRY:
2752 return cdrom_ioctl_read_tocentry(cdi, argp);
2753 case CDROMPLAYMSF:
2754 return cdrom_ioctl_play_msf(cdi, argp);
2755 case CDROMPLAYTRKIND:
2756 return cdrom_ioctl_play_trkind(cdi, argp);
2757 case CDROMVOLCTRL:
2758 return cdrom_ioctl_volctrl(cdi, argp);
2759 case CDROMVOLREAD:
2760 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2761 case CDROMSTART:
2762 case CDROMSTOP:
2763 case CDROMPAUSE:
d2c5d4fc
CH		 2764 case CDROMRESUME:
2765 return cdrom_ioctl_audioctl(cdi, cmd);
2766 }
1da177e4 2767
1da177e4
LT		 2768 return -ENOSYS;
2769}
2770
1da177e4
LT		 2771/*
2772 * Required when we need to use READ_10 to issue other than 2048 block
2773 * reads
2774 */
2775static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2776{
2777 struct cdrom_device_ops *cdo = cdi->ops;
2778 struct packet_command cgc;
2779 struct modesel_head mh;
2780
2781 memset(&mh, 0, sizeof(mh));
2782 mh.block_desc_length = 0x08;
2783 mh.block_length_med = (size >> 8) & 0xff;
2784 mh.block_length_lo = size & 0xff;
2785
2786 memset(&cgc, 0, sizeof(cgc));
2787 cgc.cmd[0] = 0x15;
2788 cgc.cmd[1] = 1 << 4;
2789 cgc.cmd[4] = 12;
2790 cgc.buflen = sizeof(mh);
2791 cgc.buffer = (char *) &mh;
2792 cgc.data_direction = CGC_DATA_WRITE;
2793 mh.block_desc_length = 0x08;
2794 mh.block_length_med = (size >> 8) & 0xff;
2795 mh.block_length_lo = size & 0xff;
2796
2797 return cdo->generic_packet(cdi, &cgc);
2798}
2799
2800static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2801 unsigned long arg)
2802{
2803 struct cdrom_device_ops *cdo = cdi->ops;
2804 struct packet_command cgc;
2805 struct request_sense sense;
2806 unsigned char buffer[32];
2807 int ret = 0;
2808
2809 memset(&cgc, 0, sizeof(cgc));
2810
2811 /* build a unified command and queue it through
2812 cdo->generic_packet() */
2813 switch (cmd) {
2814 case CDROMREADRAW:
2815 case CDROMREADMODE1:
2816 case CDROMREADMODE2: {
2817 struct cdrom_msf msf;
2818 int blocksize = 0, format = 0, lba;
2819
2820 switch (cmd) {
2821 case CDROMREADRAW:
2822 blocksize = CD_FRAMESIZE_RAW;
2823 break;
2824 case CDROMREADMODE1:
2825 blocksize = CD_FRAMESIZE;
2826 format = 2;
2827 break;
2828 case CDROMREADMODE2:
2829 blocksize = CD_FRAMESIZE_RAW0;
2830 break;
2831 }
2832 IOCTL_IN(arg, struct cdrom_msf, msf);
2833 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2834 /* FIXME: we need upper bound checking, too!! */
2835 if (lba < 0)
2836 return -EINVAL;
5cbded58 2837 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
1da177e4
LT		 2838 if (cgc.buffer == NULL)
2839 return -ENOMEM;
2840 memset(&sense, 0, sizeof(sense));
2841 cgc.sense = &sense;
2842 cgc.data_direction = CGC_DATA_READ;
2843 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2844 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2845 /*
2846 * SCSI-II devices are not required to support
2847 * READ_CD, so let's try switching block size
2848 */
2849 /* FIXME: switch back again... */
2850 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2851 kfree(cgc.buffer);
2852 return ret;
2853 }
2854 cgc.sense = NULL;
2855 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2856 ret |= cdrom_switch_blocksize(cdi, blocksize);
2857 }
2858 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2859 ret = -EFAULT;
2860 kfree(cgc.buffer);
2861 return ret;
2862 }
2863 case CDROMREADAUDIO: {
2864 struct cdrom_read_audio ra;
2865 int lba;
2866
2867 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2868
2869 if (ra.addr_format == CDROM_MSF)
2870 lba = msf_to_lba(ra.addr.msf.minute,
2871 ra.addr.msf.second,
2872 ra.addr.msf.frame);
2873 else if (ra.addr_format == CDROM_LBA)
2874 lba = ra.addr.lba;
2875 else
2876 return -EINVAL;
2877
2878 /* FIXME: we need upper bound checking, too!! */
2879 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2880 return -EINVAL;
2881
2882 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2883 }
2884 case CDROMSUBCHNL: {
2885 struct cdrom_subchnl q;
2886 u_char requested, back;
2887 IOCTL_IN(arg, struct cdrom_subchnl, q);
2888 requested = q.cdsc_format;
2889 if (!((requested == CDROM_MSF) ||
2890 (requested == CDROM_LBA)))
2891 return -EINVAL;
2892 q.cdsc_format = CDROM_MSF;
2893 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2894 return ret;
2895 back = q.cdsc_format; /* local copy */
2896 sanitize_format(&q.cdsc_absaddr, &back, requested);
2897 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2898 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2899 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2900 return 0;
2901 }
2902 case CDROMPLAYMSF: {
2903 struct cdrom_msf msf;
2904 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2905 IOCTL_IN(arg, struct cdrom_msf, msf);
2906 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2907 cgc.cmd[3] = msf.cdmsf_min0;
2908 cgc.cmd[4] = msf.cdmsf_sec0;
2909 cgc.cmd[5] = msf.cdmsf_frame0;
2910 cgc.cmd[6] = msf.cdmsf_min1;
2911 cgc.cmd[7] = msf.cdmsf_sec1;
2912 cgc.cmd[8] = msf.cdmsf_frame1;
2913 cgc.data_direction = CGC_DATA_NONE;
2914 return cdo->generic_packet(cdi, &cgc);
2915 }
2916 case CDROMPLAYBLK: {
2917 struct cdrom_blk blk;
2918 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2919 IOCTL_IN(arg, struct cdrom_blk, blk);
2920 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2921 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2922 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2923 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2924 cgc.cmd[5] = blk.from & 0xff;
2925 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2926 cgc.cmd[8] = blk.len & 0xff;
2927 cgc.data_direction = CGC_DATA_NONE;
2928 return cdo->generic_packet(cdi, &cgc);
2929 }
2930 case CDROMVOLCTRL:
2931 case CDROMVOLREAD: {
2932 struct cdrom_volctrl volctrl;
2933 char mask[sizeof(buffer)];
2934 unsigned short offset;
2935
2936 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2937
2938 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2939
2940 cgc.buffer = buffer;
2941 cgc.buflen = 24;
2942 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2943 return ret;
2944
2945 /* originally the code depended on buffer[1] to determine
2946 how much data is available for transfer. buffer[1] is
2947 unfortunately ambigious and the only reliable way seem
2948 to be to simply skip over the block descriptor... */
56052d52 2949 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
1da177e4
LT		 2950
2951 if (offset + 16 > sizeof(buffer))
2952 return -E2BIG;
2953
2954 if (offset + 16 > cgc.buflen) {
2955 cgc.buflen = offset+16;
2956 ret = cdrom_mode_sense(cdi, &cgc,
2957 GPMODE_AUDIO_CTL_PAGE, 0);
2958 if (ret)
2959 return ret;
2960 }
2961
2962 /* sanity check */
2963 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2964 buffer[offset+1] < 14)
2965 return -EINVAL;
2966
2967 /* now we have the current volume settings. if it was only
2968 a CDROMVOLREAD, return these values */
2969 if (cmd == CDROMVOLREAD) {
2970 volctrl.channel0 = buffer[offset+9];
2971 volctrl.channel1 = buffer[offset+11];
2972 volctrl.channel2 = buffer[offset+13];
2973 volctrl.channel3 = buffer[offset+15];
2974 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2975 return 0;
2976 }
2977
2978 /* get the volume mask */
2979 cgc.buffer = mask;
2980 if ((ret = cdrom_mode_sense(cdi, &cgc,
2981 GPMODE_AUDIO_CTL_PAGE, 1)))
2982 return ret;
2983
2984 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2985 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2986 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2987 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2988
2989 /* set volume */
2990 cgc.buffer = buffer + offset - 8;
2991 memset(cgc.buffer, 0, 8);
2992 return cdrom_mode_select(cdi, &cgc);
2993 }
2994
2995 case CDROMSTART:
2996 case CDROMSTOP: {
2997 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2998 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2999 cgc.cmd[1] = 1;
3000 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3001 cgc.data_direction = CGC_DATA_NONE;
3002 return cdo->generic_packet(cdi, &cgc);
3003 }
3004
3005 case CDROMPAUSE:
3006 case CDROMRESUME: {
3007 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3008 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3009 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3010 cgc.data_direction = CGC_DATA_NONE;
3011 return cdo->generic_packet(cdi, &cgc);
3012 }
3013
3014 case DVD_READ_STRUCT: {
3015 dvd_struct *s;
3016 int size = sizeof(dvd_struct);
3017 if (!CDROM_CAN(CDC_DVD))
3018 return -ENOSYS;
5cbded58 3019 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 3020 return -ENOMEM;
3021 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3022 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3023 kfree(s);
3024 return -EFAULT;
3025 }
3026 if ((ret = dvd_read_struct(cdi, s))) {
3027 kfree(s);
3028 return ret;
3029 }
3030 if (copy_to_user((dvd_struct __user *)arg, s, size))
3031 ret = -EFAULT;
3032 kfree(s);
3033 return ret;
3034 }
3035
3036 case DVD_AUTH: {
3037 dvd_authinfo ai;
3038 if (!CDROM_CAN(CDC_DVD))
3039 return -ENOSYS;
3040 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3041 IOCTL_IN(arg, dvd_authinfo, ai);
3042 if ((ret = dvd_do_auth (cdi, &ai)))
3043 return ret;
3044 IOCTL_OUT(arg, dvd_authinfo, ai);
3045 return 0;
3046 }
3047
3048 case CDROM_NEXT_WRITABLE: {
3049 long next = 0;
3050 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3051 if ((ret = cdrom_get_next_writable(cdi, &next)))
3052 return ret;
3053 IOCTL_OUT(arg, long, next);
3054 return 0;
3055 }
3056 case CDROM_LAST_WRITTEN: {
3057 long last = 0;
3058 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3059 if ((ret = cdrom_get_last_written(cdi, &last)))
3060 return ret;
3061 IOCTL_OUT(arg, long, last);
3062 return 0;
3063 }
3064 } /* switch */
3065
3066 return -ENOTTY;
3067}
3068
3069static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3070 track_information *ti)
3071{
3072 struct cdrom_device_ops *cdo = cdi->ops;
3073 struct packet_command cgc;
3074 int ret, buflen;
3075
3076 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3077 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3078 cgc.cmd[1] = type & 3;
3079 cgc.cmd[4] = (track & 0xff00) >> 8;
3080 cgc.cmd[5] = track & 0xff;
3081 cgc.cmd[8] = 8;
3082 cgc.quiet = 1;
3083
3084 if ((ret = cdo->generic_packet(cdi, &cgc)))
3085 return ret;
3086
3087 buflen = be16_to_cpu(ti->track_information_length) +
3088 sizeof(ti->track_information_length);
3089
3090 if (buflen > sizeof(track_information))
3091 buflen = sizeof(track_information);
3092
3093 cgc.cmd[8] = cgc.buflen = buflen;
3094 if ((ret = cdo->generic_packet(cdi, &cgc)))
3095 return ret;
3096
3097 /* return actual fill size */
3098 return buflen;
3099}
3100
3101/* requires CD R/RW */
3102static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3103{
3104 struct cdrom_device_ops *cdo = cdi->ops;
3105 struct packet_command cgc;
3106 int ret, buflen;
3107
3108 /* set up command and get the disc info */
3109 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3110 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3111 cgc.cmd[8] = cgc.buflen = 2;
3112 cgc.quiet = 1;
3113
3114 if ((ret = cdo->generic_packet(cdi, &cgc)))
3115 return ret;
3116
3117 /* not all drives have the same disc_info length, so requeue
3118 * packet with the length the drive tells us it can supply
3119 */
3120 buflen = be16_to_cpu(di->disc_information_length) +
3121 sizeof(di->disc_information_length);
3122
3123 if (buflen > sizeof(disc_information))
3124 buflen = sizeof(disc_information);
3125
3126 cgc.cmd[8] = cgc.buflen = buflen;
3127 if ((ret = cdo->generic_packet(cdi, &cgc)))
3128 return ret;
3129
3130 /* return actual fill size */
3131 return buflen;
3132}
3133
3134/* return the last written block on the CD-R media. this is for the udf
3135 file system. */
3136int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3137{
3138 struct cdrom_tocentry toc;
3139 disc_information di;
3140 track_information ti;
3141 __u32 last_track;
3142 int ret = -1, ti_size;
3143
3144 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3145 goto use_toc;
3146
3147 ret = cdrom_get_disc_info(cdi, &di);
3148 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3149 + sizeof(di.last_track_lsb)))
3150 goto use_toc;
3151
3152 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3153 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3154 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3155 if (ti_size < (int)offsetof(typeof(ti), track_start))
3156 goto use_toc;
3157
3158 /* if this track is blank, try the previous. */
3159 if (ti.blank) {
3160 if (last_track==1)
3161 goto use_toc;
3162 last_track--;
3163 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3164 }
3165
3166 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3167 + sizeof(ti.track_size)))
3168 goto use_toc;
3169
3170 /* if last recorded field is valid, return it. */
3171 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3172 + sizeof(ti.last_rec_address))) {
3173 *last_written = be32_to_cpu(ti.last_rec_address);
3174 } else {
3175 /* make it up instead */
3176 *last_written = be32_to_cpu(ti.track_start) +
3177 be32_to_cpu(ti.track_size);
3178 if (ti.free_blocks)
3179 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3180 }
3181 return 0;
3182
3183 /* this is where we end up if the drive either can't do a
3184 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3185 it doesn't give enough information or fails. then we return
3186 the toc contents. */
3187use_toc:
3188 toc.cdte_format = CDROM_MSF;
3189 toc.cdte_track = CDROM_LEADOUT;
3190 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3191 return ret;
3192 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3193 *last_written = toc.cdte_addr.lba;
3194 return 0;
3195}
3196
3197/* return the next writable block. also for udf file system. */
3198static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3199{
3200 disc_information di;
3201 track_information ti;
3202 __u16 last_track;
3203 int ret, ti_size;
3204
3205 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3206 goto use_last_written;
3207
3208 ret = cdrom_get_disc_info(cdi, &di);
3209 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3210 + sizeof(di.last_track_lsb))
3211 goto use_last_written;
3212
3213 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3214 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3215 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3216 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3217 goto use_last_written;
3218
3219 /* if this track is blank, try the previous. */
3220 if (ti.blank) {
3221 if (last_track == 1)
3222 goto use_last_written;
3223 last_track--;
3224 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3225 if (ti_size < 0)
3226 goto use_last_written;
3227 }
3228
3229 /* if next recordable address field is valid, use it. */
3230 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3231 + sizeof(ti.next_writable)) {
3232 *next_writable = be32_to_cpu(ti.next_writable);
3233 return 0;
3234 }
3235
3236use_last_written:
3237 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3238 *next_writable = 0;
3239 return ret;
3240 } else {
3241 *next_writable += 7;
3242 return 0;
3243 }
3244}
3245
3246EXPORT_SYMBOL(cdrom_get_last_written);
3247EXPORT_SYMBOL(register_cdrom);
3248EXPORT_SYMBOL(unregister_cdrom);
3249EXPORT_SYMBOL(cdrom_open);
3250EXPORT_SYMBOL(cdrom_release);
3251EXPORT_SYMBOL(cdrom_ioctl);
3252EXPORT_SYMBOL(cdrom_media_changed);
3253EXPORT_SYMBOL(cdrom_number_of_slots);
3254EXPORT_SYMBOL(cdrom_mode_select);
3255EXPORT_SYMBOL(cdrom_mode_sense);
3256EXPORT_SYMBOL(init_cdrom_command);
3257EXPORT_SYMBOL(cdrom_get_media_event);
3258
3259#ifdef CONFIG_SYSCTL
3260
3261#define CDROM_STR_SIZE 1000
3262
3263static struct cdrom_sysctl_settings {
3264 char info[CDROM_STR_SIZE]; /* general info */
3265 int autoclose; /* close tray upon mount, etc */
3266 int autoeject; /* eject on umount */
3267 int debug; /* turn on debugging messages */
3268 int lock; /* lock the door on device open */
3269 int check; /* check media type */
3270} cdrom_sysctl_settings;
3271
554988d6
DY		 3272enum cdrom_print_option {
3273 CTL_NAME,
3274 CTL_SPEED,
3275 CTL_SLOTS,
3276 CTL_CAPABILITY
3277};
3278
3279static int cdrom_print_info(const char *header, int val, char *info,
3280 int *pos, enum cdrom_print_option option)
3281{
3282 const int max_size = sizeof(cdrom_sysctl_settings.info);
3283 struct cdrom_device_info *cdi;
3284 int ret;
3285
3286 ret = scnprintf(info + *pos, max_size - *pos, header);
3287 if (!ret)
3288 return 1;
3289
3290 *pos += ret;
3291
7fd097d4 3292 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3293 switch (option) {
3294 case CTL_NAME:
3295 ret = scnprintf(info + *pos, max_size - *pos,
3296 "\t%s", cdi->name);
3297 break;
3298 case CTL_SPEED:
3299 ret = scnprintf(info + *pos, max_size - *pos,
3300 "\t%d", cdi->speed);
3301 break;
3302 case CTL_SLOTS:
3303 ret = scnprintf(info + *pos, max_size - *pos,
3304 "\t%d", cdi->capacity);
3305 break;
3306 case CTL_CAPABILITY:
3307 ret = scnprintf(info + *pos, max_size - *pos,
3308 "\t%d", CDROM_CAN(val) != 0);
3309 break;
3310 default:
3311 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3312 return 1;
3313 }
3314 if (!ret)
3315 return 1;
3316 *pos += ret;
3317 }
3318
3319 return 0;
3320}
3321
1da177e4
LT		 3322static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3323 void __user *buffer, size_t *lenp, loff_t *ppos)
3324{
554988d6 3325 int pos;
1da177e4 3326 char *info = cdrom_sysctl_settings.info;
554988d6 3327 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3328
3329 if (!*lenp || (*ppos && !write)) {
3330 *lenp = 0;
3331 return 0;
3332 }
3333
554988d6
DY		 3334 mutex_lock(&cdrom_mutex);
3335
1da177e4
LT		 3336 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3337
554988d6
DY		 3338 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3339 goto done;
3340 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3341 goto done;
3342 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3343 goto done;
3344 if (cdrom_print_info("\nCan close tray:\t",
3345 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3346 goto done;
3347 if (cdrom_print_info("\nCan open tray:\t",
3348 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3349 goto done;
3350 if (cdrom_print_info("\nCan lock tray:\t",
3351 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3352 goto done;
3353 if (cdrom_print_info("\nCan change speed:",
3354 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3355 goto done;
3356 if (cdrom_print_info("\nCan select disk:",
3357 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3358 goto done;
3359 if (cdrom_print_info("\nCan read multisession:",
3360 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3361 goto done;
3362 if (cdrom_print_info("\nCan read MCN:\t",
3363 CDC_MCN, info, &pos, CTL_CAPABILITY))
3364 goto done;
3365 if (cdrom_print_info("\nReports media changed:",
3366 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3367 goto done;
3368 if (cdrom_print_info("\nCan play audio:\t",
3369 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3370 goto done;
3371 if (cdrom_print_info("\nCan write CD-R:\t",
3372 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3373 goto done;
3374 if (cdrom_print_info("\nCan write CD-RW:",
3375 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3376 goto done;
3377 if (cdrom_print_info("\nCan read DVD:\t",
3378 CDC_DVD, info, &pos, CTL_CAPABILITY))
3379 goto done;
3380 if (cdrom_print_info("\nCan write DVD-R:",
3381 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3382 goto done;
3383 if (cdrom_print_info("\nCan write DVD-RAM:",
3384 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3385 goto done;
3386 if (cdrom_print_info("\nCan read MRW:\t",
3387 CDC_MRW, info, &pos, CTL_CAPABILITY))
3388 goto done;
3389 if (cdrom_print_info("\nCan write MRW:\t",
3390 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3391 goto done;
3392 if (cdrom_print_info("\nCan write RAM:\t",
3393 CDC_RAM, info, &pos, CTL_CAPABILITY))
3394 goto done;
3395 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3396 goto done;
3397doit:
3398 mutex_unlock(&cdrom_mutex);
3399 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3400done:
3401 printk(KERN_INFO "cdrom: info buffer too small\n");
3402 goto doit;
1da177e4
LT		 3403}
3404
3405/* Unfortunately, per device settings are not implemented through
3406 procfs/sysctl yet. When they are, this will naturally disappear. For now
3407 just update all drives. Later this will become the template on which
3408 new registered drives will be based. */
3409static void cdrom_update_settings(void)
3410{
3411 struct cdrom_device_info *cdi;
3412
032d8d90 3413 mutex_lock(&cdrom_mutex);
7fd097d4 3414 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3415 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3416 cdi->options |= CDO_AUTO_CLOSE;
3417 else if (!autoclose)
3418 cdi->options &= ~CDO_AUTO_CLOSE;
3419 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3420 cdi->options |= CDO_AUTO_EJECT;
3421 else if (!autoeject)
3422 cdi->options &= ~CDO_AUTO_EJECT;
3423 if (lockdoor && CDROM_CAN(CDC_LOCK))
3424 cdi->options |= CDO_LOCK;
3425 else if (!lockdoor)
3426 cdi->options &= ~CDO_LOCK;
3427 if (check_media_type)
3428 cdi->options |= CDO_CHECK_TYPE;
3429 else
3430 cdi->options &= ~CDO_CHECK_TYPE;
3431 }
032d8d90 3432 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3433}
3434
3435static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3436 void __user *buffer, size_t *lenp, loff_t *ppos)
3437{
1da177e4
LT		 3438 int ret;
3439
3440 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3441
06489b4e 3442 if (write) {
1da177e4
LT		 3443
3444 /* we only care for 1 or 0. */
06489b4e
EB		 3445 autoclose = !!cdrom_sysctl_settings.autoclose;
3446 autoeject = !!cdrom_sysctl_settings.autoeject;
3447 debug = !!cdrom_sysctl_settings.debug;
3448 lockdoor = !!cdrom_sysctl_settings.lock;
3449 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3450
1da177e4
LT		 3451 /* update the option flags according to the changes. we
3452 don't have per device options through sysctl yet,
3453 but we will have and then this will disappear. */
3454 cdrom_update_settings();
3455 }
3456
3457 return ret;
3458}
3459
3460/* Place files in /proc/sys/dev/cdrom */
3461static ctl_table cdrom_table[] = {
3462 {
1da177e4
LT		 3463 .procname = "info",
3464 .data = &cdrom_sysctl_settings.info,
3465 .maxlen = CDROM_STR_SIZE,
3466 .mode = 0444,
3467 .proc_handler = &cdrom_sysctl_info,
3468 },
3469 {
1da177e4
LT		 3470 .procname = "autoclose",
3471 .data = &cdrom_sysctl_settings.autoclose,
3472 .maxlen = sizeof(int),
3473 .mode = 0644,
3474 .proc_handler = &cdrom_sysctl_handler,
3475 },
3476 {
1da177e4
LT		 3477 .procname = "autoeject",
3478 .data = &cdrom_sysctl_settings.autoeject,
3479 .maxlen = sizeof(int),
3480 .mode = 0644,
3481 .proc_handler = &cdrom_sysctl_handler,
3482 },
3483 {
1da177e4
LT		 3484 .procname = "debug",
3485 .data = &cdrom_sysctl_settings.debug,
3486 .maxlen = sizeof(int),
3487 .mode = 0644,
3488 .proc_handler = &cdrom_sysctl_handler,
3489 },
3490 {
1da177e4
LT		 3491 .procname = "lock",
3492 .data = &cdrom_sysctl_settings.lock,
3493 .maxlen = sizeof(int),
3494 .mode = 0644,
3495 .proc_handler = &cdrom_sysctl_handler,
3496 },
3497 {
1da177e4
LT		 3498 .procname = "check_media",
3499 .data = &cdrom_sysctl_settings.check,
3500 .maxlen = sizeof(int),
3501 .mode = 0644,
3502 .proc_handler = &cdrom_sysctl_handler
3503 },
3504 { .ctl_name = 0 }
3505};
3506
3507static ctl_table cdrom_cdrom_table[] = {
3508 {
3509 .ctl_name = DEV_CDROM,
3510 .procname = "cdrom",
3511 .maxlen = 0,
3512 .mode = 0555,
3513 .child = cdrom_table,
3514 },
3515 { .ctl_name = 0 }
3516};
3517
3518/* Make sure that /proc/sys/dev is there */
3519static ctl_table cdrom_root_table[] = {
3520 {
3521 .ctl_name = CTL_DEV,
3522 .procname = "dev",
3523 .maxlen = 0,
3524 .mode = 0555,
3525 .child = cdrom_cdrom_table,
3526 },
3527 { .ctl_name = 0 }
3528};
3529static struct ctl_table_header *cdrom_sysctl_header;
3530
3531static void cdrom_sysctl_register(void)
3532{
3533 static int initialized;
3534
3535 if (initialized == 1)
3536 return;
3537
0b4d4147 3538 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3539
3540 /* set the defaults */
3541 cdrom_sysctl_settings.autoclose = autoclose;
3542 cdrom_sysctl_settings.autoeject = autoeject;
3543 cdrom_sysctl_settings.debug = debug;
3544 cdrom_sysctl_settings.lock = lockdoor;
3545 cdrom_sysctl_settings.check = check_media_type;
3546
3547 initialized = 1;
3548}
3549
3550static void cdrom_sysctl_unregister(void)
3551{
3552 if (cdrom_sysctl_header)
3553 unregister_sysctl_table(cdrom_sysctl_header);
3554}
3555
17672cf0
AM		 3556#else /* CONFIG_SYSCTL */
3557
3558static void cdrom_sysctl_register(void)
3559{
3560}
3561
3562static void cdrom_sysctl_unregister(void)
3563{
3564}
3565
1da177e4
LT		 3566#endif /* CONFIG_SYSCTL */
3567
3568static int __init cdrom_init(void)
3569{
1da177e4 3570 cdrom_sysctl_register();
17672cf0 3571
1da177e4
LT		 3572 return 0;
3573}
3574
3575static void __exit cdrom_exit(void)
3576{
3577 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
1da177e4 3578 cdrom_sysctl_unregister();
1da177e4
LT		 3579}
3580
3581module_init(cdrom_init);
3582module_exit(cdrom_exit);
3583MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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