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[PATCH] Fixup blk_rq_unmap_user() API
[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
305static DEFINE_SPINLOCK(cdrom_lock);
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
340/* Not-exported routines. */
341static int open_for_data(struct cdrom_device_info * cdi);
342static int check_for_audio_disc(struct cdrom_device_info * cdi,
343 struct cdrom_device_ops * cdo);
344static void sanitize_format(union cdrom_addr *addr,
345 u_char * curr, u_char requested);
346static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
347 unsigned long arg);
348
349int cdrom_get_last_written(struct cdrom_device_info *, long *);
350static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
351static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
352
353static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
354
355static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
356
357#ifdef CONFIG_SYSCTL
358static void cdrom_sysctl_register(void);
359#endif /* CONFIG_SYSCTL */
360static struct cdrom_device_info *topCdromPtr;
361
362static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
363 struct packet_command *cgc)
364{
365 if (cgc->sense) {
366 cgc->sense->sense_key = 0x05;
367 cgc->sense->asc = 0x20;
368 cgc->sense->ascq = 0x00;
369 }
370
371 cgc->stat = -EIO;
372 return -EIO;
373}
374
375/* This macro makes sure we don't have to check on cdrom_device_ops
376 * existence in the run-time routines below. Change_capability is a
377 * hack to have the capability flags defined const, while we can still
378 * change it here without gcc complaining at every line.
379 */
380#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
381
382int register_cdrom(struct cdrom_device_info *cdi)
383{
384 static char banner_printed;
385 struct cdrom_device_ops *cdo = cdi->ops;
386 int *change_capability = (int *)&cdo->capability; /* hack */
387
388 cdinfo(CD_OPEN, "entering register_cdrom\n");
389
390 if (cdo->open == NULL || cdo->release == NULL)
391 return -2;
392 if (!banner_printed) {
393 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
394 banner_printed = 1;
395#ifdef CONFIG_SYSCTL
396 cdrom_sysctl_register();
397#endif /* CONFIG_SYSCTL */
398 }
399
400 ENSURE(drive_status, CDC_DRIVE_STATUS );
401 ENSURE(media_changed, CDC_MEDIA_CHANGED);
402 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
403 ENSURE(lock_door, CDC_LOCK);
404 ENSURE(select_speed, CDC_SELECT_SPEED);
405 ENSURE(get_last_session, CDC_MULTI_SESSION);
406 ENSURE(get_mcn, CDC_MCN);
407 ENSURE(reset, CDC_RESET);
408 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
1da177e4
LT		 409 ENSURE(generic_packet, CDC_GENERIC_PACKET);
410 cdi->mc_flags = 0;
411 cdo->n_minors = 0;
412 cdi->options = CDO_USE_FFLAGS;
413
414 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
415 cdi->options |= (int) CDO_AUTO_CLOSE;
416 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
417 cdi->options |= (int) CDO_AUTO_EJECT;
418 if (lockdoor==1)
419 cdi->options |= (int) CDO_LOCK;
420 if (check_media_type==1)
421 cdi->options |= (int) CDO_CHECK_TYPE;
422
423 if (CDROM_CAN(CDC_MRW_W))
424 cdi->exit = cdrom_mrw_exit;
425
426 if (cdi->disk)
427 cdi->cdda_method = CDDA_BPC_FULL;
428 else
429 cdi->cdda_method = CDDA_OLD;
430
431 if (!cdo->generic_packet)
432 cdo->generic_packet = cdrom_dummy_generic_packet;
433
434 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
435 spin_lock(&cdrom_lock);
436 cdi->next = topCdromPtr;
437 topCdromPtr = cdi;
438 spin_unlock(&cdrom_lock);
439 return 0;
440}
441#undef ENSURE
442
443int unregister_cdrom(struct cdrom_device_info *unreg)
444{
445 struct cdrom_device_info *cdi, *prev;
446 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
447
448 prev = NULL;
449 spin_lock(&cdrom_lock);
450 cdi = topCdromPtr;
451 while (cdi && cdi != unreg) {
452 prev = cdi;
453 cdi = cdi->next;
454 }
455
456 if (cdi == NULL) {
457 spin_unlock(&cdrom_lock);
458 return -2;
459 }
460 if (prev)
461 prev->next = cdi->next;
462 else
463 topCdromPtr = cdi->next;
464
465 spin_unlock(&cdrom_lock);
466
467 if (cdi->exit)
468 cdi->exit(cdi);
469
470 cdi->ops->n_minors--;
471 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
472 return 0;
473}
474
475int cdrom_get_media_event(struct cdrom_device_info *cdi,
476 struct media_event_desc *med)
477{
478 struct packet_command cgc;
479 unsigned char buffer[8];
480 struct event_header *eh = (struct event_header *) buffer;
481
482 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
483 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
484 cgc.cmd[1] = 1; /* IMMED */
485 cgc.cmd[4] = 1 << 4; /* media event */
486 cgc.cmd[8] = sizeof(buffer);
487 cgc.quiet = 1;
488
489 if (cdi->ops->generic_packet(cdi, &cgc))
490 return 1;
491
492 if (be16_to_cpu(eh->data_len) < sizeof(*med))
493 return 1;
494
495 if (eh->nea || eh->notification_class != 0x4)
496 return 1;
497
498 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
499 return 0;
500}
501
502/*
503 * the first prototypes used 0x2c as the page code for the mrw mode page,
504 * subsequently this was changed to 0x03. probe the one used by this drive
505 */
506static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
507{
508 struct packet_command cgc;
509 char buffer[16];
510
511 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
512
513 cgc.timeout = HZ;
514 cgc.quiet = 1;
515
516 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
517 cdi->mrw_mode_page = MRW_MODE_PC;
518 return 0;
519 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
520 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
521 return 0;
522 }
523
524 return 1;
525}
526
527static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
528{
529 struct packet_command cgc;
530 struct mrw_feature_desc *mfd;
531 unsigned char buffer[16];
532 int ret;
533
534 *write = 0;
535
536 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
537
538 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
539 cgc.cmd[3] = CDF_MRW;
540 cgc.cmd[8] = sizeof(buffer);
541 cgc.quiet = 1;
542
543 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
544 return ret;
545
546 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
547 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
548 return 1;
549 *write = mfd->write;
550
551 if ((ret = cdrom_mrw_probe_pc(cdi))) {
552 *write = 0;
553 return ret;
554 }
555
556 return 0;
557}
558
559static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
560{
561 struct packet_command cgc;
562 unsigned char buffer[12];
563 int ret;
564
565 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
566
567 /*
568 * FmtData bit set (bit 4), format type is 1
569 */
570 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
571 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
572 cgc.cmd[1] = (1 << 4) | 1;
573
574 cgc.timeout = 5 * 60 * HZ;
575
576 /*
577 * 4 byte format list header, 8 byte format list descriptor
578 */
579 buffer[1] = 1 << 1;
580 buffer[3] = 8;
581
582 /*
583 * nr_blocks field
584 */
585 buffer[4] = 0xff;
586 buffer[5] = 0xff;
587 buffer[6] = 0xff;
588 buffer[7] = 0xff;
589
590 buffer[8] = 0x24 << 2;
591 buffer[11] = cont;
592
593 ret = cdi->ops->generic_packet(cdi, &cgc);
594 if (ret)
595 printk(KERN_INFO "cdrom: bgformat failed\n");
596
597 return ret;
598}
599
600static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
601{
602 struct packet_command cgc;
603
604 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
605 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
606
607 /*
608 * Session = 1, Track = 0
609 */
610 cgc.cmd[1] = !!immed;
611 cgc.cmd[2] = 1 << 1;
612
613 cgc.timeout = 5 * 60 * HZ;
614
615 return cdi->ops->generic_packet(cdi, &cgc);
616}
617
618static int cdrom_flush_cache(struct cdrom_device_info *cdi)
619{
620 struct packet_command cgc;
621
622 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
623 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
624
625 cgc.timeout = 5 * 60 * HZ;
626
627 return cdi->ops->generic_packet(cdi, &cgc);
628}
629
630static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
631{
632 disc_information di;
633 int ret;
634
635 ret = cdrom_get_disc_info(cdi, &di);
636 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
637 return 1;
638
639 ret = 0;
640 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
641 printk(KERN_INFO "cdrom: issuing MRW back ground "
642 "format suspend\n");
643 ret = cdrom_mrw_bgformat_susp(cdi, 0);
644 }
645
7da21a02 646 if (!ret && cdi->media_written)
1da177e4
LT		 647 ret = cdrom_flush_cache(cdi);
648
649 return ret;
650}
651
652static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
653{
654 struct packet_command cgc;
655 struct mode_page_header *mph;
656 char buffer[16];
657 int ret, offset, size;
658
659 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
660
661 cgc.buffer = buffer;
662 cgc.buflen = sizeof(buffer);
663
664 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
665 return ret;
666
667 mph = (struct mode_page_header *) buffer;
668 offset = be16_to_cpu(mph->desc_length);
669 size = be16_to_cpu(mph->mode_data_length) + 2;
670
671 buffer[offset + 3] = space;
672 cgc.buflen = size;
673
674 if ((ret = cdrom_mode_select(cdi, &cgc)))
675 return ret;
676
677 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
678 return 0;
679}
680
681static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
682 struct rwrt_feature_desc *rfd)
683{
684 struct packet_command cgc;
685 char buffer[24];
686 int ret;
687
688 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
689
690 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
691 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
692 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
693 cgc.quiet = 1;
694
695 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
696 return ret;
697
698 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
699 return 0;
700}
701
702static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
703{
704 struct packet_command cgc;
705 char buffer[16];
56052d52 706 __be16 *feature_code;
1da177e4
LT		 707 int ret;
708
709 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
710
711 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
712 cgc.cmd[3] = CDF_HWDM;
713 cgc.cmd[8] = sizeof(buffer);
714 cgc.quiet = 1;
715
716 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
717 return ret;
718
56052d52 719 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4
LT		 720 if (be16_to_cpu(*feature_code) == CDF_HWDM)
721 return 0;
722
723 return 1;
724}
725
726
727static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
728{
729 struct rwrt_feature_desc rfd;
730 int ret;
731
732 *write = 0;
733
734 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
735 return ret;
736
737 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
738 *write = 1;
739
740 return 0;
741}
742
743static int cdrom_media_erasable(struct cdrom_device_info *cdi)
744{
745 disc_information di;
746 int ret;
747
748 ret = cdrom_get_disc_info(cdi, &di);
749 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
750 return -1;
751
752 return di.erasable;
753}
754
755/*
756 * FIXME: check RO bit
757 */
758static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
759{
760 int ret = cdrom_media_erasable(cdi);
761
762 /*
763 * allow writable open if media info read worked and media is
764 * erasable, _or_ if it fails since not all drives support it
765 */
766 if (!ret)
767 return 1;
768
769 return 0;
770}
771
772static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
773{
774 disc_information di;
775 int ret;
776
777 /*
778 * always reset to DMA lba space on open
779 */
780 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
781 printk(KERN_ERR "cdrom: failed setting lba address space\n");
782 return 1;
783 }
784
785 ret = cdrom_get_disc_info(cdi, &di);
786 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
787 return 1;
788
789 if (!di.erasable)
790 return 1;
791
792 /*
793 * mrw_status
794 * 0 - not MRW formatted
795 * 1 - MRW bgformat started, but not running or complete
796 * 2 - MRW bgformat in progress
797 * 3 - MRW formatting complete
798 */
799 ret = 0;
800 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
801 mrw_format_status[di.mrw_status]);
802 if (!di.mrw_status)
803 ret = 1;
804 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
805 mrw_format_restart)
806 ret = cdrom_mrw_bgformat(cdi, 1);
807
808 return ret;
809}
810
811static int mo_open_write(struct cdrom_device_info *cdi)
812{
813 struct packet_command cgc;
814 char buffer[255];
815 int ret;
816
817 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
818 cgc.quiet = 1;
819
820 /*
821 * obtain write protect information as per
822 * drivers/scsi/sd.c:sd_read_write_protect_flag
823 */
824
825 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
826 if (ret)
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
828 if (ret) {
829 cgc.buflen = 255;
830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
831 }
832
833 /* drive gave us no info, let the user go ahead */
834 if (ret)
835 return 0;
836
837 return buffer[3] & 0x80;
838}
839
840static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
841{
842 struct rwrt_feature_desc rfd;
843 int ret;
844
845 if ((ret = cdrom_has_defect_mgt(cdi)))
846 return ret;
847
848 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
849 return ret;
850 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
851 ret = !rfd.curr;
852
853 cdinfo(CD_OPEN, "can open for random write\n");
854 return ret;
855}
856
857static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
858{
859 struct packet_command cgc;
860 char buffer[32];
861 int ret, mmc3_profile;
862
863 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
864
865 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
866 cgc.cmd[1] = 0;
867 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
868 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
869 cgc.quiet = 1;
870
871 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
872 mmc3_profile = 0xffff;
873 else
874 mmc3_profile = (buffer[6] << 8) | buffer[7];
875
876 cdi->mmc3_profile = mmc3_profile;
877}
878
879static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
880{
881 switch (cdi->mmc3_profile) {
882 case 0x12: /* DVD-RAM */
883 case 0x1A: /* DVD+RW */
884 return 0;
885 default:
886 return 1;
887 }
888}
889
890/*
891 * returns 0 for ok to open write, non-0 to disallow
892 */
893static int cdrom_open_write(struct cdrom_device_info *cdi)
894{
895 int mrw, mrw_write, ram_write;
896 int ret = 1;
897
898 mrw = 0;
899 if (!cdrom_is_mrw(cdi, &mrw_write))
900 mrw = 1;
901
902 if (CDROM_CAN(CDC_MO_DRIVE))
903 ram_write = 1;
904 else
905 (void) cdrom_is_random_writable(cdi, &ram_write);
906
907 if (mrw)
908 cdi->mask &= ~CDC_MRW;
909 else
910 cdi->mask |= CDC_MRW;
911
912 if (mrw_write)
913 cdi->mask &= ~CDC_MRW_W;
914 else
915 cdi->mask |= CDC_MRW_W;
916
917 if (ram_write)
918 cdi->mask &= ~CDC_RAM;
919 else
920 cdi->mask |= CDC_RAM;
921
922 if (CDROM_CAN(CDC_MRW_W))
923 ret = cdrom_mrw_open_write(cdi);
924 else if (CDROM_CAN(CDC_DVD_RAM))
925 ret = cdrom_dvdram_open_write(cdi);
926 else if (CDROM_CAN(CDC_RAM) &&
927 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
928 ret = cdrom_ram_open_write(cdi);
929 else if (CDROM_CAN(CDC_MO_DRIVE))
930 ret = mo_open_write(cdi);
931 else if (!cdrom_is_dvd_rw(cdi))
932 ret = 0;
933
934 return ret;
935}
936
937static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
938{
939 struct packet_command cgc;
940
941 if (cdi->mmc3_profile != 0x1a) {
942 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
943 return;
944 }
945
946 if (!cdi->media_written) {
947 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
948 return;
949 }
950
951 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
952 cdi->name);
953
954 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
955 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
956 cgc.timeout = 30*HZ;
957 cdi->ops->generic_packet(cdi, &cgc);
958
959 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
960 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
961 cgc.timeout = 3000*HZ;
962 cgc.quiet = 1;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.cmd[2] = 2; /* Close session */
968 cgc.quiet = 1;
969 cgc.timeout = 3000*HZ;
970 cdi->ops->generic_packet(cdi, &cgc);
971
972 cdi->media_written = 0;
973}
974
975static int cdrom_close_write(struct cdrom_device_info *cdi)
976{
977#if 0
978 return cdrom_flush_cache(cdi);
979#else
980 return 0;
981#endif
982}
983
984/* We use the open-option O_NONBLOCK to indicate that the
985 * purpose of opening is only for subsequent ioctl() calls; no device
986 * integrity checks are performed.
987 *
988 * We hope that all cd-player programs will adopt this convention. It
989 * is in their own interest: device control becomes a lot easier
990 * this way.
991 */
992int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
993{
994 int ret;
995
996 cdinfo(CD_OPEN, "entering cdrom_open\n");
997
998 /* if this was a O_NONBLOCK open and we should honor the flags,
999 * do a quick open without drive/disc integrity checks. */
1000 cdi->use_count++;
1001 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
1002 ret = cdi->ops->open(cdi, 1);
1003 } else {
1004 ret = open_for_data(cdi);
1005 if (ret)
1006 goto err;
1007 cdrom_mmc3_profile(cdi);
1008 if (fp->f_mode & FMODE_WRITE) {
1009 ret = -EROFS;
1010 if (cdrom_open_write(cdi))
16070428 1011 goto err_release;
1da177e4 1012 if (!CDROM_CAN(CDC_RAM))
16070428 1013 goto err_release;
1da177e4
LT		 1014 ret = 0;
1015 cdi->media_written = 0;
1016 }
1017 }
1018
1019 if (ret)
1020 goto err;
1021
1022 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1023 cdi->name, cdi->use_count);
1024 /* Do this on open. Don't wait for mount, because they might
1025 not be mounting, but opening with O_NONBLOCK */
1026 check_disk_change(ip->i_bdev);
1027 return 0;
16070428
JA		 1028err_release:
1029 cdi->ops->release(cdi);
1da177e4
LT		 1030err:
1031 cdi->use_count--;
1032 return ret;
1033}
1034
1035static
1036int open_for_data(struct cdrom_device_info * cdi)
1037{
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cdinfo(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cdinfo(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cdinfo(CD_OPEN, "trying to close the tray.\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cdinfo(CD_OPEN, "the tray is now closed.\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cdinfo(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1099 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)current->pid);
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1106 }
1107 }
1108
1109 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cdinfo(CD_OPEN, "open device failed.\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cdinfo(CD_OPEN, "door locked.\n");
1124 }
1125 cdinfo(CD_OPEN, "device opened successfully.\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
00d6da9b 1134 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cdinfo(CD_OPEN, "door unlocked.\n");
1138 }
1139 return ret;
1140}
1141
1142/* This code is similar to that in open_for_data. The routine is called
1143 whenever an audio play operation is requested.
1144*/
1145int check_for_audio_disc(struct cdrom_device_info * cdi,
1146 struct cdrom_device_ops * cdo)
1147{
1148 int ret;
1149 tracktype tracks;
1150 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1151 if (!(cdi->options & CDO_CHECK_TYPE))
1152 return 0;
1153 if (cdo->drive_status != NULL) {
1154 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1155 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1156 if (ret == CDS_TRAY_OPEN) {
1157 cdinfo(CD_OPEN, "the tray is open...\n");
1158 /* can/may i close it? */
1159 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1160 cdi->options & CDO_AUTO_CLOSE) {
1161 cdinfo(CD_OPEN, "trying to close the tray.\n");
1162 ret=cdo->tray_move(cdi,0);
1163 if (ret) {
1164 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1165 /* Ignore the error from the low
1166 level driver. We don't care why it
1167 couldn't close the tray. We only care
1168 that there is no disc in the drive,
1169 since that is the _REAL_ problem here.*/
1170 return -ENOMEDIUM;
1171 }
1172 } else {
1173 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1174 return -ENOMEDIUM;
1175 }
1176 /* Ok, the door should be closed now.. Check again */
1177 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1178 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1179 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1180 return -ENOMEDIUM;
1181 }
1182 if (ret!=CDS_DISC_OK) {
1183 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1184 return -EIO;
1185 }
1186 cdinfo(CD_OPEN, "the tray is now closed.\n");
1187 }
1188 }
1189 cdrom_count_tracks(cdi, &tracks);
1190 if (tracks.error)
1191 return(tracks.error);
1192
1193 if (tracks.audio==0)
1194 return -EMEDIUMTYPE;
1195
1196 return 0;
1197}
1198
1199/* Admittedly, the logic below could be performed in a nicer way. */
1200int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1201{
1202 struct cdrom_device_ops *cdo = cdi->ops;
1203 int opened_for_data;
1204
1205 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1206
1207 if (cdi->use_count > 0)
1208 cdi->use_count--;
1209 if (cdi->use_count == 0)
1210 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1211 if (cdi->use_count == 0)
1212 cdrom_dvd_rw_close_write(cdi);
1213 if (cdi->use_count == 0 &&
1214 (cdo->capability & CDC_LOCK) && !keeplocked) {
1215 cdinfo(CD_CLOSE, "Unlocking door!\n");
1216 cdo->lock_door(cdi, 0);
1217 }
1218 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1219 !(fp && fp->f_flags & O_NONBLOCK);
1220
1221 /*
1222 * flush cache on last write release
1223 */
1224 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1225 cdrom_close_write(cdi);
1226
1227 cdo->release(cdi);
1228 if (cdi->use_count == 0) { /* last process that closes dev*/
1229 if (opened_for_data &&
1230 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1231 cdo->tray_move(cdi, 1);
1232 }
1233 return 0;
1234}
1235
1236static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1237 struct cdrom_changer_info *buf)
1238{
1239 struct packet_command cgc;
1240 struct cdrom_device_ops *cdo = cdi->ops;
1241 int length;
1242
1243 /*
1244 * Sanyo changer isn't spec compliant (doesn't use regular change
1245 * LOAD_UNLOAD command, and it doesn't implement the mech status
1246 * command below
1247 */
1248 if (cdi->sanyo_slot) {
1249 buf->hdr.nslots = 3;
1250 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1251 for (length = 0; length < 3; length++) {
1252 buf->slots[length].disc_present = 1;
1253 buf->slots[length].change = 0;
1254 }
1255 return 0;
1256 }
1257
1258 length = sizeof(struct cdrom_mechstat_header) +
1259 cdi->capacity * sizeof(struct cdrom_slot);
1260
1261 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1262 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1263 cgc.cmd[8] = (length >> 8) & 0xff;
1264 cgc.cmd[9] = length & 0xff;
1265 return cdo->generic_packet(cdi, &cgc);
1266}
1267
1268static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1269{
1270 struct cdrom_changer_info *info;
1271 int ret;
1272
1273 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1274 if (cdi->sanyo_slot)
1275 return CDS_NO_INFO;
1276
1277 info = kmalloc(sizeof(*info), GFP_KERNEL);
1278 if (!info)
1279 return -ENOMEM;
1280
1281 if ((ret = cdrom_read_mech_status(cdi, info)))
1282 goto out_free;
1283
1284 if (info->slots[slot].disc_present)
1285 ret = CDS_DISC_OK;
1286 else
1287 ret = CDS_NO_DISC;
1288
1289out_free:
1290 kfree(info);
1291 return ret;
1292}
1293
1294/* Return the number of slots for an ATAPI/SCSI cdrom,
1295 * return 1 if not a changer.
1296 */
1297int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1298{
1299 int status;
1300 int nslots = 1;
1301 struct cdrom_changer_info *info;
1302
1303 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1304 /* cdrom_read_mech_status requires a valid value for capacity: */
1305 cdi->capacity = 0;
1306
1307 info = kmalloc(sizeof(*info), GFP_KERNEL);
1308 if (!info)
1309 return -ENOMEM;
1310
1311 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1312 nslots = info->hdr.nslots;
1313
1314 kfree(info);
1315 return nslots;
1316}
1317
1318
1319/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1320static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1321{
1322 struct packet_command cgc;
1323
1324 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1325 if (cdi->sanyo_slot && slot < 0)
1326 return 0;
1327
1328 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1329 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1330 cgc.cmd[4] = 2 + (slot >= 0);
1331 cgc.cmd[8] = slot;
1332 cgc.timeout = 60 * HZ;
1333
1334 /* The Sanyo 3 CD changer uses byte 7 of the
1335 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1336 using the GPCMD_LOAD_UNLOAD opcode. */
1337 if (cdi->sanyo_slot && -1 < slot) {
1338 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1339 cgc.cmd[7] = slot;
1340 cgc.cmd[4] = cgc.cmd[8] = 0;
1341 cdi->sanyo_slot = slot ? slot : 3;
1342 }
1343
1344 return cdi->ops->generic_packet(cdi, &cgc);
1345}
1346
1347static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1348{
1349 struct cdrom_changer_info *info;
1350 int curslot;
1351 int ret;
1352
1353 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1354 if (!CDROM_CAN(CDC_SELECT_DISC))
1355 return -EDRIVE_CANT_DO_THIS;
1356
1357 (void) cdi->ops->media_changed(cdi, slot);
1358
1359 if (slot == CDSL_NONE) {
1360 /* set media changed bits, on both queues */
1361 cdi->mc_flags = 0x3;
1362 return cdrom_load_unload(cdi, -1);
1363 }
1364
1365 info = kmalloc(sizeof(*info), GFP_KERNEL);
1366 if (!info)
1367 return -ENOMEM;
1368
1369 if ((ret = cdrom_read_mech_status(cdi, info))) {
1370 kfree(info);
1371 return ret;
1372 }
1373
1374 curslot = info->hdr.curslot;
1375 kfree(info);
1376
1377 if (cdi->use_count > 1 || keeplocked) {
1378 if (slot == CDSL_CURRENT) {
1379 return curslot;
1380 } else {
1381 return -EBUSY;
1382 }
1383 }
1384
1385 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1386 which is useful if it had been previously unloaded.
1387 Whether it can or not, it returns the current slot.
1388 Similarly, if slot happens to be the current one, we still
1389 try and load it. */
1390 if (slot == CDSL_CURRENT)
1391 slot = curslot;
1392
1393 /* set media changed bits on both queues */
1394 cdi->mc_flags = 0x3;
1395 if ((ret = cdrom_load_unload(cdi, slot)))
1396 return ret;
1397
1398 return slot;
1399}
1400
1401/* We want to make media_changed accessible to the user through an
1402 * ioctl. The main problem now is that we must double-buffer the
1403 * low-level implementation, to assure that the VFS and the user both
1404 * see a medium change once.
1405 */
1406
1407static
1408int media_changed(struct cdrom_device_info *cdi, int queue)
1409{
1410 unsigned int mask = (1 << (queue & 1));
1411 int ret = !!(cdi->mc_flags & mask);
1412
1413 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1414 return ret;
1415 /* changed since last call? */
1416 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1417 cdi->mc_flags = 0x3; /* set bit on both queues */
1418 ret |= 1;
1419 cdi->media_written = 0;
1420 }
1421 cdi->mc_flags &= ~mask; /* clear bit */
1422 return ret;
1423}
1424
1425int cdrom_media_changed(struct cdrom_device_info *cdi)
1426{
1427 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1428 * Returning "0" is always safe (media hasn't been changed). Do that
1429 * if the low-level cdrom driver dosn't support media changed. */
1430 if (cdi == NULL || cdi->ops->media_changed == NULL)
1431 return 0;
1432 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1433 return 0;
1434 return media_changed(cdi, 0);
1435}
1436
1437/* badly broken, I know. Is due for a fixup anytime. */
1438static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1439{
1440 struct cdrom_tochdr header;
1441 struct cdrom_tocentry entry;
1442 int ret, i;
1443 tracks->data=0;
1444 tracks->audio=0;
1445 tracks->cdi=0;
1446 tracks->xa=0;
1447 tracks->error=0;
1448 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1449 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 /* Grab the TOC header so we can see how many tracks there are */
1454 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1455 if (ret == -ENOMEDIUM)
1456 tracks->error = CDS_NO_DISC;
1457 else
1458 tracks->error = CDS_NO_INFO;
1459 return;
1460 }
1461 /* check what type of tracks are on this disc */
1462 entry.cdte_format = CDROM_MSF;
1463 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1464 entry.cdte_track = i;
1465 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1466 tracks->error=CDS_NO_INFO;
1467 return;
1468 }
1469 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1470 if (entry.cdte_format == 0x10)
1471 tracks->cdi++;
1472 else if (entry.cdte_format == 0x20)
1473 tracks->xa++;
1474 else
1475 tracks->data++;
1476 } else
1477 tracks->audio++;
1478 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1479 i, entry.cdte_format, entry.cdte_ctrl);
1480 }
1481 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1482 header.cdth_trk1, tracks->audio, tracks->data,
1483 tracks->cdi, tracks->xa);
1484}
1485
1486/* Requests to the low-level drivers will /always/ be done in the
1487 following format convention:
1488
1489 CDROM_LBA: all data-related requests.
1490 CDROM_MSF: all audio-related requests.
1491
1492 However, a low-level implementation is allowed to refuse this
1493 request, and return information in its own favorite format.
1494
1495 It doesn't make sense /at all/ to ask for a play_audio in LBA
1496 format, or ask for multi-session info in MSF format. However, for
1497 backward compatibility these format requests will be satisfied, but
1498 the requests to the low-level drivers will be sanitized in the more
1499 meaningful format indicated above.
1500 */
1501
1502static
1503void sanitize_format(union cdrom_addr *addr,
1504 u_char * curr, u_char requested)
1505{
1506 if (*curr == requested)
1507 return; /* nothing to be done! */
1508 if (requested == CDROM_LBA) {
1509 addr->lba = (int) addr->msf.frame +
1510 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1511 } else { /* CDROM_MSF */
1512 int lba = addr->lba;
1513 addr->msf.frame = lba % 75;
1514 lba /= 75;
1515 lba += 2;
1516 addr->msf.second = lba % 60;
1517 addr->msf.minute = lba / 60;
1518 }
1519 *curr = requested;
1520}
1521
1522void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1523 int type)
1524{
1525 memset(cgc, 0, sizeof(struct packet_command));
1526 if (buf)
1527 memset(buf, 0, len);
1528 cgc->buffer = (char *) buf;
1529 cgc->buflen = len;
1530 cgc->data_direction = type;
1531 cgc->timeout = 5*HZ;
1532}
1533
1534/* DVD handling */
1535
1536#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1537#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1538
1539static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1540{
1541 cgc->cmd[0] = GPCMD_REPORT_KEY;
1542 cgc->cmd[10] = type | (agid << 6);
1543 switch (type) {
1544 case 0: case 8: case 5: {
1545 cgc->buflen = 8;
1546 break;
1547 }
1548 case 1: {
1549 cgc->buflen = 16;
1550 break;
1551 }
1552 case 2: case 4: {
1553 cgc->buflen = 12;
1554 break;
1555 }
1556 }
1557 cgc->cmd[9] = cgc->buflen;
1558 cgc->data_direction = CGC_DATA_READ;
1559}
1560
1561static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1562{
1563 cgc->cmd[0] = GPCMD_SEND_KEY;
1564 cgc->cmd[10] = type | (agid << 6);
1565 switch (type) {
1566 case 1: {
1567 cgc->buflen = 16;
1568 break;
1569 }
1570 case 3: {
1571 cgc->buflen = 12;
1572 break;
1573 }
1574 case 6: {
1575 cgc->buflen = 8;
1576 break;
1577 }
1578 }
1579 cgc->cmd[9] = cgc->buflen;
1580 cgc->data_direction = CGC_DATA_WRITE;
1581}
1582
1583static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1584{
1585 int ret;
1586 u_char buf[20];
1587 struct packet_command cgc;
1588 struct cdrom_device_ops *cdo = cdi->ops;
1589 rpc_state_t rpc_state;
1590
1591 memset(buf, 0, sizeof(buf));
1592 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1593
1594 switch (ai->type) {
1595 /* LU data send */
1596 case DVD_LU_SEND_AGID:
1597 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1598 cgc.quiet = 1;
1599 setup_report_key(&cgc, ai->lsa.agid, 0);
1600
1601 if ((ret = cdo->generic_packet(cdi, &cgc)))
1602 return ret;
1603
1604 ai->lsa.agid = buf[7] >> 6;
1605 /* Returning data, let host change state */
1606 break;
1607
1608 case DVD_LU_SEND_KEY1:
1609 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1610 setup_report_key(&cgc, ai->lsk.agid, 2);
1611
1612 if ((ret = cdo->generic_packet(cdi, &cgc)))
1613 return ret;
1614
1615 copy_key(ai->lsk.key, &buf[4]);
1616 /* Returning data, let host change state */
1617 break;
1618
1619 case DVD_LU_SEND_CHALLENGE:
1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1621 setup_report_key(&cgc, ai->lsc.agid, 1);
1622
1623 if ((ret = cdo->generic_packet(cdi, &cgc)))
1624 return ret;
1625
1626 copy_chal(ai->lsc.chal, &buf[4]);
1627 /* Returning data, let host change state */
1628 break;
1629
1630 /* Post-auth key */
1631 case DVD_LU_SEND_TITLE_KEY:
1632 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1633 cgc.quiet = 1;
1634 setup_report_key(&cgc, ai->lstk.agid, 4);
1635 cgc.cmd[5] = ai->lstk.lba;
1636 cgc.cmd[4] = ai->lstk.lba >> 8;
1637 cgc.cmd[3] = ai->lstk.lba >> 16;
1638 cgc.cmd[2] = ai->lstk.lba >> 24;
1639
1640 if ((ret = cdo->generic_packet(cdi, &cgc)))
1641 return ret;
1642
1643 ai->lstk.cpm = (buf[4] >> 7) & 1;
1644 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1645 ai->lstk.cgms = (buf[4] >> 4) & 3;
1646 copy_key(ai->lstk.title_key, &buf[5]);
1647 /* Returning data, let host change state */
1648 break;
1649
1650 case DVD_LU_SEND_ASF:
1651 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1652 setup_report_key(&cgc, ai->lsasf.agid, 5);
1653
1654 if ((ret = cdo->generic_packet(cdi, &cgc)))
1655 return ret;
1656
1657 ai->lsasf.asf = buf[7] & 1;
1658 break;
1659
1660 /* LU data receive (LU changes state) */
1661 case DVD_HOST_SEND_CHALLENGE:
1662 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1663 setup_send_key(&cgc, ai->hsc.agid, 1);
1664 buf[1] = 0xe;
1665 copy_chal(&buf[4], ai->hsc.chal);
1666
1667 if ((ret = cdo->generic_packet(cdi, &cgc)))
1668 return ret;
1669
1670 ai->type = DVD_LU_SEND_KEY1;
1671 break;
1672
1673 case DVD_HOST_SEND_KEY2:
1674 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1675 setup_send_key(&cgc, ai->hsk.agid, 3);
1676 buf[1] = 0xa;
1677 copy_key(&buf[4], ai->hsk.key);
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1680 ai->type = DVD_AUTH_FAILURE;
1681 return ret;
1682 }
1683 ai->type = DVD_AUTH_ESTABLISHED;
1684 break;
1685
1686 /* Misc */
1687 case DVD_INVALIDATE_AGID:
1688 cgc.quiet = 1;
1689 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1690 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1691 if ((ret = cdo->generic_packet(cdi, &cgc)))
1692 return ret;
1693 break;
1694
1695 /* Get region settings */
1696 case DVD_LU_SEND_RPC_STATE:
1697 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1698 setup_report_key(&cgc, 0, 8);
1699 memset(&rpc_state, 0, sizeof(rpc_state_t));
1700 cgc.buffer = (char *) &rpc_state;
1701
1702 if ((ret = cdo->generic_packet(cdi, &cgc)))
1703 return ret;
1704
1705 ai->lrpcs.type = rpc_state.type_code;
1706 ai->lrpcs.vra = rpc_state.vra;
1707 ai->lrpcs.ucca = rpc_state.ucca;
1708 ai->lrpcs.region_mask = rpc_state.region_mask;
1709 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1710 break;
1711
1712 /* Set region settings */
1713 case DVD_HOST_SEND_RPC_STATE:
1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1715 setup_send_key(&cgc, 0, 6);
1716 buf[1] = 6;
1717 buf[4] = ai->hrpcs.pdrc;
1718
1719 if ((ret = cdo->generic_packet(cdi, &cgc)))
1720 return ret;
1721 break;
1722
1723 default:
1724 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1725 return -ENOTTY;
1726 }
1727
1728 return 0;
1729}
1730
1731static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1732{
1733 unsigned char buf[21], *base;
1734 struct dvd_layer *layer;
1735 struct packet_command cgc;
1736 struct cdrom_device_ops *cdo = cdi->ops;
1737 int ret, layer_num = s->physical.layer_num;
1738
1739 if (layer_num >= DVD_LAYERS)
1740 return -EINVAL;
1741
1742 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1743 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1744 cgc.cmd[6] = layer_num;
1745 cgc.cmd[7] = s->type;
1746 cgc.cmd[9] = cgc.buflen & 0xff;
1747
1748 /*
1749 * refrain from reporting errors on non-existing layers (mainly)
1750 */
1751 cgc.quiet = 1;
1752
1753 if ((ret = cdo->generic_packet(cdi, &cgc)))
1754 return ret;
1755
1756 base = &buf[4];
1757 layer = &s->physical.layer[layer_num];
1758
1759 /*
1760 * place the data... really ugly, but at least we won't have to
1761 * worry about endianess in userspace.
1762 */
1763 memset(layer, 0, sizeof(*layer));
1764 layer->book_version = base[0] & 0xf;
1765 layer->book_type = base[0] >> 4;
1766 layer->min_rate = base[1] & 0xf;
1767 layer->disc_size = base[1] >> 4;
1768 layer->layer_type = base[2] & 0xf;
1769 layer->track_path = (base[2] >> 4) & 1;
1770 layer->nlayers = (base[2] >> 5) & 3;
1771 layer->track_density = base[3] & 0xf;
1772 layer->linear_density = base[3] >> 4;
1773 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1774 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1775 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1776 layer->bca = base[16] >> 7;
1777
1778 return 0;
1779}
1780
1781static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1782{
1783 int ret;
1784 u_char buf[8];
1785 struct packet_command cgc;
1786 struct cdrom_device_ops *cdo = cdi->ops;
1787
1788 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1789 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1790 cgc.cmd[6] = s->copyright.layer_num;
1791 cgc.cmd[7] = s->type;
1792 cgc.cmd[8] = cgc.buflen >> 8;
1793 cgc.cmd[9] = cgc.buflen & 0xff;
1794
1795 if ((ret = cdo->generic_packet(cdi, &cgc)))
1796 return ret;
1797
1798 s->copyright.cpst = buf[4];
1799 s->copyright.rmi = buf[5];
1800
1801 return 0;
1802}
1803
1804static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1805{
1806 int ret, size;
1807 u_char *buf;
1808 struct packet_command cgc;
1809 struct cdrom_device_ops *cdo = cdi->ops;
1810
1811 size = sizeof(s->disckey.value) + 4;
1812
5cbded58 1813 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1814 return -ENOMEM;
1815
1816 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1817 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1818 cgc.cmd[7] = s->type;
1819 cgc.cmd[8] = size >> 8;
1820 cgc.cmd[9] = size & 0xff;
1821 cgc.cmd[10] = s->disckey.agid << 6;
1822
1823 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1824 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1825
1826 kfree(buf);
1827 return ret;
1828}
1829
1830static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1831{
1832 int ret;
1833 u_char buf[4 + 188];
1834 struct packet_command cgc;
1835 struct cdrom_device_ops *cdo = cdi->ops;
1836
1837 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1838 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1839 cgc.cmd[7] = s->type;
454d6fbc 1840 cgc.cmd[9] = cgc.buflen & 0xff;
1da177e4
LT		 1841
1842 if ((ret = cdo->generic_packet(cdi, &cgc)))
1843 return ret;
1844
1845 s->bca.len = buf[0] << 8 | buf[1];
1846 if (s->bca.len < 12 || s->bca.len > 188) {
1847 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1848 return -EIO;
1849 }
1850 memcpy(s->bca.value, &buf[4], s->bca.len);
1851
1852 return 0;
1853}
1854
1855static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1856{
1857 int ret = 0, size;
1858 u_char *buf;
1859 struct packet_command cgc;
1860 struct cdrom_device_ops *cdo = cdi->ops;
1861
1862 size = sizeof(s->manufact.value) + 4;
1863
5cbded58 1864 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1865 return -ENOMEM;
1866
1867 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1868 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1869 cgc.cmd[7] = s->type;
1870 cgc.cmd[8] = size >> 8;
1871 cgc.cmd[9] = size & 0xff;
1872
1873 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1874 kfree(buf);
1875 return ret;
1876 }
1877
1878 s->manufact.len = buf[0] << 8 | buf[1];
1879 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1880 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1881 " (%d)\n", s->manufact.len);
1882 ret = -EIO;
1883 } else {
1884 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1885 }
1886
1887 kfree(buf);
1888 return ret;
1889}
1890
1891static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1892{
1893 switch (s->type) {
1894 case DVD_STRUCT_PHYSICAL:
1895 return dvd_read_physical(cdi, s);
1896
1897 case DVD_STRUCT_COPYRIGHT:
1898 return dvd_read_copyright(cdi, s);
1899
1900 case DVD_STRUCT_DISCKEY:
1901 return dvd_read_disckey(cdi, s);
1902
1903 case DVD_STRUCT_BCA:
1904 return dvd_read_bca(cdi, s);
1905
1906 case DVD_STRUCT_MANUFACT:
1907 return dvd_read_manufact(cdi, s);
1908
1909 default:
1910 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1911 s->type);
1912 return -EINVAL;
1913 }
1914}
1915
1916int cdrom_mode_sense(struct cdrom_device_info *cdi,
1917 struct packet_command *cgc,
1918 int page_code, int page_control)
1919{
1920 struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1923
1924 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1925 cgc->cmd[2] = page_code | (page_control << 6);
1926 cgc->cmd[7] = cgc->buflen >> 8;
1927 cgc->cmd[8] = cgc->buflen & 0xff;
1928 cgc->data_direction = CGC_DATA_READ;
1929 return cdo->generic_packet(cdi, cgc);
1930}
1931
1932int cdrom_mode_select(struct cdrom_device_info *cdi,
1933 struct packet_command *cgc)
1934{
1935 struct cdrom_device_ops *cdo = cdi->ops;
1936
1937 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1938 memset(cgc->buffer, 0, 2);
1939 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1940 cgc->cmd[1] = 0x10; /* PF */
1941 cgc->cmd[7] = cgc->buflen >> 8;
1942 cgc->cmd[8] = cgc->buflen & 0xff;
1943 cgc->data_direction = CGC_DATA_WRITE;
1944 return cdo->generic_packet(cdi, cgc);
1945}
1946
1947static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1948 struct cdrom_subchnl *subchnl, int mcn)
1949{
1950 struct cdrom_device_ops *cdo = cdi->ops;
1951 struct packet_command cgc;
1952 char buffer[32];
1953 int ret;
1954
1955 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1956 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1957 cgc.cmd[1] = 2; /* MSF addressing */
1958 cgc.cmd[2] = 0x40; /* request subQ data */
1959 cgc.cmd[3] = mcn ? 2 : 1;
1960 cgc.cmd[8] = 16;
1961
1962 if ((ret = cdo->generic_packet(cdi, &cgc)))
1963 return ret;
1964
1965 subchnl->cdsc_audiostatus = cgc.buffer[1];
1966 subchnl->cdsc_format = CDROM_MSF;
1967 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1968 subchnl->cdsc_trk = cgc.buffer[6];
1969 subchnl->cdsc_ind = cgc.buffer[7];
1970
1971 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1972 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1973 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1974 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1975 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1976 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1977
1978 return 0;
1979}
1980
1981/*
1982 * Specific READ_10 interface
1983 */
1984static int cdrom_read_cd(struct cdrom_device_info *cdi,
1985 struct packet_command *cgc, int lba,
1986 int blocksize, int nblocks)
1987{
1988 struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1991 cgc->cmd[0] = GPCMD_READ_10;
1992 cgc->cmd[2] = (lba >> 24) & 0xff;
1993 cgc->cmd[3] = (lba >> 16) & 0xff;
1994 cgc->cmd[4] = (lba >> 8) & 0xff;
1995 cgc->cmd[5] = lba & 0xff;
1996 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1997 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1998 cgc->cmd[8] = nblocks & 0xff;
1999 cgc->buflen = blocksize * nblocks;
2000 return cdo->generic_packet(cdi, cgc);
2001}
2002
2003/* very generic interface for reading the various types of blocks */
2004static int cdrom_read_block(struct cdrom_device_info *cdi,
2005 struct packet_command *cgc,
2006 int lba, int nblocks, int format, int blksize)
2007{
2008 struct cdrom_device_ops *cdo = cdi->ops;
2009
2010 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2011 cgc->cmd[0] = GPCMD_READ_CD;
2012 /* expected sector size - cdda,mode1,etc. */
2013 cgc->cmd[1] = format << 2;
2014 /* starting address */
2015 cgc->cmd[2] = (lba >> 24) & 0xff;
2016 cgc->cmd[3] = (lba >> 16) & 0xff;
2017 cgc->cmd[4] = (lba >> 8) & 0xff;
2018 cgc->cmd[5] = lba & 0xff;
2019 /* number of blocks */
2020 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2021 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2022 cgc->cmd[8] = nblocks & 0xff;
2023 cgc->buflen = blksize * nblocks;
2024
2025 /* set the header info returned */
2026 switch (blksize) {
2027 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2028 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2029 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2030 default : cgc->cmd[9] = 0x10;
2031 }
2032
2033 return cdo->generic_packet(cdi, cgc);
2034}
2035
2036static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2037 int lba, int nframes)
2038{
2039 struct packet_command cgc;
2040 int ret = 0;
2041 int nr;
2042
2043 cdi->last_sense = 0;
2044
2045 memset(&cgc, 0, sizeof(cgc));
2046
2047 /*
2048 * start with will ra.nframes size, back down if alloc fails
2049 */
2050 nr = nframes;
2051 do {
2052 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2053 if (cgc.buffer)
2054 break;
2055
2056 nr >>= 1;
2057 } while (nr);
2058
2059 if (!nr)
2060 return -ENOMEM;
2061
2062 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2063 ret = -EFAULT;
2064 goto out;
2065 }
2066
2067 cgc.data_direction = CGC_DATA_READ;
2068 while (nframes > 0) {
2069 if (nr > nframes)
2070 nr = nframes;
2071
2072 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2073 if (ret)
2074 break;
2075 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2076 ret = -EFAULT;
2077 break;
2078 }
2079 ubuf += CD_FRAMESIZE_RAW * nr;
2080 nframes -= nr;
2081 lba += nr;
2082 }
2083out:
2084 kfree(cgc.buffer);
2085 return ret;
2086}
2087
2088static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2089 int lba, int nframes)
2090{
2091 request_queue_t *q = cdi->disk->queue;
2092 struct request *rq;
2093 struct bio *bio;
2094 unsigned int len;
2095 int nr, ret = 0;
2096
2097 if (!q)
2098 return -ENXIO;
2099
dd1cab95
JA		 2100 rq = blk_get_request(q, READ, GFP_KERNEL);
2101 if (!rq)
2102 return -ENOMEM;
2103
1da177e4
LT		 2104 cdi->last_sense = 0;
2105
2106 while (nframes) {
2107 nr = nframes;
2108 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2109 nr = 1;
2110 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2111 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2112
2113 len = nr * CD_FRAMESIZE_RAW;
2114
dd1cab95
JA		 2115 ret = blk_rq_map_user(q, rq, ubuf, len);
2116 if (ret)
2117 break;
1da177e4
LT		 2118
2119 memset(rq->cmd, 0, sizeof(rq->cmd));
2120 rq->cmd[0] = GPCMD_READ_CD;
2121 rq->cmd[1] = 1 << 2;
2122 rq->cmd[2] = (lba >> 24) & 0xff;
2123 rq->cmd[3] = (lba >> 16) & 0xff;
2124 rq->cmd[4] = (lba >> 8) & 0xff;
2125 rq->cmd[5] = lba & 0xff;
2126 rq->cmd[6] = (nr >> 16) & 0xff;
2127 rq->cmd[7] = (nr >> 8) & 0xff;
2128 rq->cmd[8] = nr & 0xff;
2129 rq->cmd[9] = 0xf8;
2130
2131 rq->cmd_len = 12;
4aff5e23 2132 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2133 rq->timeout = 60 * HZ;
2134 bio = rq->bio;
2135
994ca9a1 2136 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2137 struct request_sense *s = rq->sense;
2138 ret = -EIO;
2139 cdi->last_sense = s->sense_key;
2140 }
2141
8e5cfc45 2142 if (blk_rq_unmap_user(bio))
1da177e4
LT		 2143 ret = -EFAULT;
2144
2145 if (ret)
2146 break;
2147
2148 nframes -= nr;
2149 lba += nr;
2150 ubuf += len;
2151 }
2152
dd1cab95 2153 blk_put_request(rq);
1da177e4
LT		 2154 return ret;
2155}
2156
2157static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2158 int lba, int nframes)
2159{
2160 int ret;
2161
2162 if (cdi->cdda_method == CDDA_OLD)
2163 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2164
2165retry:
2166 /*
2167 * for anything else than success and io error, we need to retry
2168 */
2169 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2170 if (!ret || ret != -EIO)
2171 return ret;
2172
2173 /*
2174 * I've seen drives get sense 4/8/3 udma crc errors on multi
2175 * frame dma, so drop to single frame dma if we need to
2176 */
2177 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2178 printk("cdrom: dropping to single frame dma\n");
2179 cdi->cdda_method = CDDA_BPC_SINGLE;
2180 goto retry;
2181 }
2182
2183 /*
2184 * so we have an io error of some sort with multi frame dma. if the
2185 * condition wasn't a hardware error
2186 * problems, not for any error
2187 */
2188 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2189 return ret;
2190
2191 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2192 cdi->cdda_method = CDDA_OLD;
2193 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2194}
2195
d2c5d4fc
CH		 2196static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2197 void __user *argp)
1da177e4 2198{
d2c5d4fc
CH		 2199 struct cdrom_multisession ms_info;
2200 u8 requested_format;
1da177e4
LT		 2201 int ret;
2202
d2c5d4fc
CH		 2203 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2204
2205 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2206 return -ENOSYS;
2207
2208 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2209 return -EFAULT;
2210
2211 requested_format = ms_info.addr_format;
2212 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2213 return -EINVAL;
2214 ms_info.addr_format = CDROM_LBA;
2215
2216 ret = cdi->ops->get_last_session(cdi, &ms_info);
2217 if (ret)
1da177e4
LT		 2218 return ret;
2219
d2c5d4fc
CH		 2220 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2221
2222 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2223 return -EFAULT;
2224
2225 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2226 return 0;
2227}
2228
2229static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2230{
2231 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2232
2233 if (!CDROM_CAN(CDC_OPEN_TRAY))
2234 return -ENOSYS;
2235 if (cdi->use_count != 1 || keeplocked)
2236 return -EBUSY;
2237 if (CDROM_CAN(CDC_LOCK)) {
2238 int ret = cdi->ops->lock_door(cdi, 0);
2239 if (ret)
1da177e4 2240 return ret;
d2c5d4fc 2241 }
1da177e4 2242
d2c5d4fc
CH		 2243 return cdi->ops->tray_move(cdi, 1);
2244}
1da177e4 2245
d2c5d4fc
CH		 2246static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2247{
2248 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2249
d2c5d4fc
CH		 2250 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2251 return -ENOSYS;
2252 return cdi->ops->tray_move(cdi, 0);
2253}
1da177e4 2254
d2c5d4fc
CH		 2255static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2256 unsigned long arg)
2257{
2258 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2259
d2c5d4fc
CH		 2260 if (!CDROM_CAN(CDC_OPEN_TRAY))
2261 return -ENOSYS;
2262 if (keeplocked)
2263 return -EBUSY;
1da177e4 2264
d2c5d4fc
CH		 2265 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2266 if (arg)
2267 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2268 return 0;
2269}
1da177e4 2270
d2c5d4fc
CH		 2271static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2272 unsigned long arg)
2273{
2274 struct cdrom_changer_info *info;
2275 int ret;
1da177e4 2276
d2c5d4fc 2277 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2278
d2c5d4fc
CH		 2279 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2280 return -ENOSYS;
1da177e4 2281
d2c5d4fc
CH		 2282 /* cannot select disc or select current disc */
2283 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2284 return media_changed(cdi, 1);
1da177e4 2285
d2c5d4fc
CH		 2286 if ((unsigned int)arg >= cdi->capacity)
2287 return -EINVAL;
1da177e4 2288
d2c5d4fc
CH		 2289 info = kmalloc(sizeof(*info), GFP_KERNEL);
2290 if (!info)
2291 return -ENOMEM;
1da177e4 2292
d2c5d4fc
CH		 2293 ret = cdrom_read_mech_status(cdi, info);
2294 if (!ret)
2295 ret = info->slots[arg].change;
2296 kfree(info);
2297 return ret;
2298}
1da177e4 2299
d2c5d4fc
CH		 2300static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2301 unsigned long arg)
2302{
2303 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2304
d2c5d4fc
CH		 2305 /*
2306 * Options need to be in sync with capability.
2307 * Too late for that, so we have to check each one separately.
2308 */
2309 switch (arg) {
2310 case CDO_USE_FFLAGS:
2311 case CDO_CHECK_TYPE:
2312 break;
2313 case CDO_LOCK:
2314 if (!CDROM_CAN(CDC_LOCK))
2315 return -ENOSYS;
2316 break;
2317 case 0:
2318 return cdi->options;
2319 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2320 default:
2321 if (!CDROM_CAN(arg))
1da177e4 2322 return -ENOSYS;
d2c5d4fc
CH		 2323 }
2324 cdi->options |= (int) arg;
2325 return cdi->options;
2326}
1da177e4 2327
d2c5d4fc
CH		 2328static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2329 unsigned long arg)
2330{
2331 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2332
d2c5d4fc
CH		 2333 cdi->options &= ~(int) arg;
2334 return cdi->options;
2335}
1da177e4 2336
d2c5d4fc
CH		 2337static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2338 unsigned long arg)
2339{
2340 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2341
d2c5d4fc
CH		 2342 if (!CDROM_CAN(CDC_SELECT_SPEED))
2343 return -ENOSYS;
2344 return cdi->ops->select_speed(cdi, arg);
2345}
1da177e4 2346
d2c5d4fc
CH		 2347static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2348 unsigned long arg)
2349{
2350 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2351
2352 if (!CDROM_CAN(CDC_SELECT_DISC))
2353 return -ENOSYS;
2354
2355 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2356 if ((int)arg >= cdi->capacity)
2357 return -EINVAL;
2358 }
2359
2360 /*
2361 * ->select_disc is a hook to allow a driver-specific way of
2362 * seleting disc. However, since there is no equivalent hook for
2363 * cdrom_slot_status this may not actually be useful...
2364 */
2365 if (cdi->ops->select_disc)
2366 return cdi->ops->select_disc(cdi, arg);
2367
2368 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2369 return cdrom_select_disc(cdi, arg);
2370}
2371
2372static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2373 struct block_device *bdev)
2374{
2375 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2376
2377 if (!capable(CAP_SYS_ADMIN))
2378 return -EACCES;
2379 if (!CDROM_CAN(CDC_RESET))
2380 return -ENOSYS;
2381 invalidate_bdev(bdev, 0);
2382 return cdi->ops->reset(cdi);
2383}
2384
2385static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2386 unsigned long arg)
2387{
2388 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2389
2390 if (!CDROM_CAN(CDC_LOCK))
2391 return -EDRIVE_CANT_DO_THIS;
2392
2393 keeplocked = arg ? 1 : 0;
2394
2395 /*
2396 * Don't unlock the door on multiple opens by default, but allow
2397 * root to do so.
2398 */
2399 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2400 return -EBUSY;
2401 return cdi->ops->lock_door(cdi, arg);
2402}
2403
2404static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2405 unsigned long arg)
2406{
2407 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2408
2409 if (!capable(CAP_SYS_ADMIN))
2410 return -EACCES;
2411 debug = arg ? 1 : 0;
2412 return debug;
2413}
1da177e4 2414
d2c5d4fc
CH		 2415static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2416{
2417 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2418 return (cdi->ops->capability & ~cdi->mask);
2419}
2420
2421/*
2422 * The following function is implemented, although very few audio
1da177e4
LT		 2423 * discs give Universal Product Code information, which should just be
2424 * the Medium Catalog Number on the box. Note, that the way the code
2425 * is written on the CD is /not/ uniform across all discs!
2426 */
d2c5d4fc
CH		 2427static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2428 void __user *argp)
2429{
2430 struct cdrom_mcn mcn;
2431 int ret;
1da177e4 2432
d2c5d4fc 2433 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2434
d2c5d4fc
CH		 2435 if (!(cdi->ops->capability & CDC_MCN))
2436 return -ENOSYS;
2437 ret = cdi->ops->get_mcn(cdi, &mcn);
2438 if (ret)
2439 return ret;
1da177e4 2440
d2c5d4fc
CH		 2441 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2442 return -EFAULT;
2443 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2444 return 0;
2445}
1da177e4 2446
d2c5d4fc
CH		 2447static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2448 unsigned long arg)
2449{
2450 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2451
2452 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2453 return -ENOSYS;
2454 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2455 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2456 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2457 if (((int)arg >= cdi->capacity))
2458 return -EINVAL;
2459 return cdrom_slot_status(cdi, arg);
2460}
2461
2462/*
2463 * Ok, this is where problems start. The current interface for the
2464 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2465 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2466 * is often the case, it is also very common for CDs to have some tracks
2467 * with data, and some tracks with audio. Just because I feel like it,
2468 * I declare the following to be the best way to cope. If the CD has ANY
2469 * data tracks on it, it will be returned as a data CD. If it has any XA
2470 * tracks, I will return it as that. Now I could simplify this interface
2471 * by combining these returns with the above, but this more clearly
2472 * demonstrates the problem with the current interface. Too bad this
2473 * wasn't designed to use bitmasks... -Erik
2474 *
2475 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2476 * User level programmers might feel the ioctl is not very useful.
2477 * ---david
2478 */
2479static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2480{
2481 tracktype tracks;
2482
2483 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2484
2485 cdrom_count_tracks(cdi, &tracks);
2486 if (tracks.error)
2487 return tracks.error;
2488
2489 /* Policy mode on */
2490 if (tracks.audio > 0) {
2491 if (!tracks.data && !tracks.cdi && !tracks.xa)
2492 return CDS_AUDIO;
2493 else
2494 return CDS_MIXED;
1da177e4
LT		 2495 }
2496
d2c5d4fc
CH		 2497 if (tracks.cdi > 0)
2498 return CDS_XA_2_2;
2499 if (tracks.xa > 0)
2500 return CDS_XA_2_1;
2501 if (tracks.data > 0)
2502 return CDS_DATA_1;
2503 /* Policy mode off */
2504
2505 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2506 return CDS_NO_INFO;
2507}
2508
2509static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2510{
2511 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2512 return cdi->capacity;
2513}
2514
2515static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2516 void __user *argp)
2517{
2518 struct cdrom_subchnl q;
2519 u8 requested, back;
2520 int ret;
2521
2522 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2523
2524 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2525 return -ENOSYS;
2526 if (copy_from_user(&q, argp, sizeof(q)))
2527 return -EFAULT;
2528
2529 requested = q.cdsc_format;
2530 if (requested != CDROM_MSF && requested != CDROM_LBA)
2531 return -EINVAL;
2532 q.cdsc_format = CDROM_MSF;
2533
2534 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2535 if (ret)
2536 return ret;
2537
2538 back = q.cdsc_format; /* local copy */
2539 sanitize_format(&q.cdsc_absaddr, &back, requested);
2540 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2541
2542 if (copy_to_user(argp, &q, sizeof(q)))
2543 return -EFAULT;
2544 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2545 return 0;
2546}
2547
2548static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2549 void __user *argp)
2550{
2551 struct cdrom_tochdr header;
2552 int ret;
2553
2554 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2555
2556 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2557 return -ENOSYS;
2558 if (copy_from_user(&header, argp, sizeof(header)))
2559 return -EFAULT;
2560
2561 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2562 if (ret)
2563 return ret;
2564
2565 if (copy_to_user(argp, &header, sizeof(header)))
2566 return -EFAULT;
2567 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2568 return 0;
2569}
2570
2571static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2572 void __user *argp)
2573{
2574 struct cdrom_tocentry entry;
2575 u8 requested_format;
2576 int ret;
2577
2578 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2579
2580 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2581 return -ENOSYS;
2582 if (copy_from_user(&entry, argp, sizeof(entry)))
2583 return -EFAULT;
2584
2585 requested_format = entry.cdte_format;
2586 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2587 return -EINVAL;
2588 /* make interface to low-level uniform */
2589 entry.cdte_format = CDROM_MSF;
2590 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2591 if (ret)
2592 return ret;
2593 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2594
2595 if (copy_to_user(argp, &entry, sizeof(entry)))
2596 return -EFAULT;
2597 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2598 return 0;
2599}
2600
2601static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2602 void __user *argp)
2603{
2604 struct cdrom_msf msf;
2605
2606 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2607
2608 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2609 return -ENOSYS;
2610 if (copy_from_user(&msf, argp, sizeof(msf)))
2611 return -EFAULT;
2612 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2613}
2614
2615static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2616 void __user *argp)
2617{
2618 struct cdrom_ti ti;
2619 int ret;
2620
2621 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2622
2623 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2624 return -ENOSYS;
2625 if (copy_from_user(&ti, argp, sizeof(ti)))
2626 return -EFAULT;
2627
2628 ret = check_for_audio_disc(cdi, cdi->ops);
2629 if (ret)
2630 return ret;
2631 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2632}
2633static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2634 void __user *argp)
2635{
2636 struct cdrom_volctrl volume;
2637
2638 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2639
2640 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2641 return -ENOSYS;
2642 if (copy_from_user(&volume, argp, sizeof(volume)))
2643 return -EFAULT;
2644 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2645}
2646
2647static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2648 void __user *argp)
2649{
2650 struct cdrom_volctrl volume;
2651 int ret;
2652
2653 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2654
2655 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2656 return -ENOSYS;
2657
2658 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2659 if (ret)
2660 return ret;
2661
2662 if (copy_to_user(argp, &volume, sizeof(volume)))
2663 return -EFAULT;
2664 return 0;
2665}
2666
2667static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2668 unsigned int cmd)
2669{
2670 int ret;
2671
2672 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2673
2674 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2675 return -ENOSYS;
2676 ret = check_for_audio_disc(cdi, cdi->ops);
2677 if (ret)
2678 return ret;
2679 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2680}
2681
2682/*
2683 * Just about every imaginable ioctl is supported in the Uniform layer
2684 * these days.
2685 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2686 */
2687int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2688 struct inode *ip, unsigned int cmd, unsigned long arg)
2689{
2690 void __user *argp = (void __user *)arg;
2691 int ret;
2692
2693 /*
2694 * Try the generic SCSI command ioctl's first.
2695 */
2696 ret = scsi_cmd_ioctl(file, ip->i_bdev->bd_disk, cmd, argp);
2697 if (ret != -ENOTTY)
2698 return ret;
2699
2700 switch (cmd) {
2701 case CDROMMULTISESSION:
2702 return cdrom_ioctl_multisession(cdi, argp);
2703 case CDROMEJECT:
2704 return cdrom_ioctl_eject(cdi);
2705 case CDROMCLOSETRAY:
2706 return cdrom_ioctl_closetray(cdi);
2707 case CDROMEJECT_SW:
2708 return cdrom_ioctl_eject_sw(cdi, arg);
2709 case CDROM_MEDIA_CHANGED:
2710 return cdrom_ioctl_media_changed(cdi, arg);
2711 case CDROM_SET_OPTIONS:
2712 return cdrom_ioctl_set_options(cdi, arg);
2713 case CDROM_CLEAR_OPTIONS:
2714 return cdrom_ioctl_clear_options(cdi, arg);
2715 case CDROM_SELECT_SPEED:
2716 return cdrom_ioctl_select_speed(cdi, arg);
2717 case CDROM_SELECT_DISC:
2718 return cdrom_ioctl_select_disc(cdi, arg);
2719 case CDROMRESET:
2720 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2721 case CDROM_LOCKDOOR:
2722 return cdrom_ioctl_lock_door(cdi, arg);
2723 case CDROM_DEBUG:
2724 return cdrom_ioctl_debug(cdi, arg);
2725 case CDROM_GET_CAPABILITY:
2726 return cdrom_ioctl_get_capability(cdi);
2727 case CDROM_GET_MCN:
2728 return cdrom_ioctl_get_mcn(cdi, argp);
2729 case CDROM_DRIVE_STATUS:
2730 return cdrom_ioctl_drive_status(cdi, arg);
2731 case CDROM_DISC_STATUS:
2732 return cdrom_ioctl_disc_status(cdi);
2733 case CDROM_CHANGER_NSLOTS:
2734 return cdrom_ioctl_changer_nslots(cdi);
2735 }
2736
2737 /*
2738 * Use the ioctls that are implemented through the generic_packet()
2739 * interface. this may look at bit funny, but if -ENOTTY is
2740 * returned that particular ioctl is not implemented and we
2741 * let it go through the device specific ones.
2742 */
1da177e4
LT		 2743 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2744 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2745 if (ret != -ENOTTY)
1da177e4 2746 return ret;
1da177e4
LT		 2747 }
2748
d2c5d4fc
CH		 2749 /*
2750 * Note: most of the cdinfo() calls are commented out here,
2751 * because they fill up the sys log when CD players poll
2752 * the drive.
2753 */
1da177e4 2754 switch (cmd) {
d2c5d4fc
CH		 2755 case CDROMSUBCHNL:
2756 return cdrom_ioctl_get_subchnl(cdi, argp);
2757 case CDROMREADTOCHDR:
2758 return cdrom_ioctl_read_tochdr(cdi, argp);
2759 case CDROMREADTOCENTRY:
2760 return cdrom_ioctl_read_tocentry(cdi, argp);
2761 case CDROMPLAYMSF:
2762 return cdrom_ioctl_play_msf(cdi, argp);
2763 case CDROMPLAYTRKIND:
2764 return cdrom_ioctl_play_trkind(cdi, argp);
2765 case CDROMVOLCTRL:
2766 return cdrom_ioctl_volctrl(cdi, argp);
2767 case CDROMVOLREAD:
2768 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2769 case CDROMSTART:
2770 case CDROMSTOP:
2771 case CDROMPAUSE:
d2c5d4fc
CH		 2772 case CDROMRESUME:
2773 return cdrom_ioctl_audioctl(cdi, cmd);
2774 }
1da177e4 2775
1da177e4
LT		 2776 return -ENOSYS;
2777}
2778
2779static inline
2780int msf_to_lba(char m, char s, char f)
2781{
2782 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
2783}
2784
2785/*
2786 * Required when we need to use READ_10 to issue other than 2048 block
2787 * reads
2788 */
2789static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2790{
2791 struct cdrom_device_ops *cdo = cdi->ops;
2792 struct packet_command cgc;
2793 struct modesel_head mh;
2794
2795 memset(&mh, 0, sizeof(mh));
2796 mh.block_desc_length = 0x08;
2797 mh.block_length_med = (size >> 8) & 0xff;
2798 mh.block_length_lo = size & 0xff;
2799
2800 memset(&cgc, 0, sizeof(cgc));
2801 cgc.cmd[0] = 0x15;
2802 cgc.cmd[1] = 1 << 4;
2803 cgc.cmd[4] = 12;
2804 cgc.buflen = sizeof(mh);
2805 cgc.buffer = (char *) &mh;
2806 cgc.data_direction = CGC_DATA_WRITE;
2807 mh.block_desc_length = 0x08;
2808 mh.block_length_med = (size >> 8) & 0xff;
2809 mh.block_length_lo = size & 0xff;
2810
2811 return cdo->generic_packet(cdi, &cgc);
2812}
2813
2814static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2815 unsigned long arg)
2816{
2817 struct cdrom_device_ops *cdo = cdi->ops;
2818 struct packet_command cgc;
2819 struct request_sense sense;
2820 unsigned char buffer[32];
2821 int ret = 0;
2822
2823 memset(&cgc, 0, sizeof(cgc));
2824
2825 /* build a unified command and queue it through
2826 cdo->generic_packet() */
2827 switch (cmd) {
2828 case CDROMREADRAW:
2829 case CDROMREADMODE1:
2830 case CDROMREADMODE2: {
2831 struct cdrom_msf msf;
2832 int blocksize = 0, format = 0, lba;
2833
2834 switch (cmd) {
2835 case CDROMREADRAW:
2836 blocksize = CD_FRAMESIZE_RAW;
2837 break;
2838 case CDROMREADMODE1:
2839 blocksize = CD_FRAMESIZE;
2840 format = 2;
2841 break;
2842 case CDROMREADMODE2:
2843 blocksize = CD_FRAMESIZE_RAW0;
2844 break;
2845 }
2846 IOCTL_IN(arg, struct cdrom_msf, msf);
2847 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2848 /* FIXME: we need upper bound checking, too!! */
2849 if (lba < 0)
2850 return -EINVAL;
5cbded58 2851 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
1da177e4
LT		 2852 if (cgc.buffer == NULL)
2853 return -ENOMEM;
2854 memset(&sense, 0, sizeof(sense));
2855 cgc.sense = &sense;
2856 cgc.data_direction = CGC_DATA_READ;
2857 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2858 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2859 /*
2860 * SCSI-II devices are not required to support
2861 * READ_CD, so let's try switching block size
2862 */
2863 /* FIXME: switch back again... */
2864 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2865 kfree(cgc.buffer);
2866 return ret;
2867 }
2868 cgc.sense = NULL;
2869 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2870 ret |= cdrom_switch_blocksize(cdi, blocksize);
2871 }
2872 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2873 ret = -EFAULT;
2874 kfree(cgc.buffer);
2875 return ret;
2876 }
2877 case CDROMREADAUDIO: {
2878 struct cdrom_read_audio ra;
2879 int lba;
2880
2881 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2882
2883 if (ra.addr_format == CDROM_MSF)
2884 lba = msf_to_lba(ra.addr.msf.minute,
2885 ra.addr.msf.second,
2886 ra.addr.msf.frame);
2887 else if (ra.addr_format == CDROM_LBA)
2888 lba = ra.addr.lba;
2889 else
2890 return -EINVAL;
2891
2892 /* FIXME: we need upper bound checking, too!! */
2893 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2894 return -EINVAL;
2895
2896 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2897 }
2898 case CDROMSUBCHNL: {
2899 struct cdrom_subchnl q;
2900 u_char requested, back;
2901 IOCTL_IN(arg, struct cdrom_subchnl, q);
2902 requested = q.cdsc_format;
2903 if (!((requested == CDROM_MSF) ||
2904 (requested == CDROM_LBA)))
2905 return -EINVAL;
2906 q.cdsc_format = CDROM_MSF;
2907 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2908 return ret;
2909 back = q.cdsc_format; /* local copy */
2910 sanitize_format(&q.cdsc_absaddr, &back, requested);
2911 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2912 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2913 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2914 return 0;
2915 }
2916 case CDROMPLAYMSF: {
2917 struct cdrom_msf msf;
2918 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2919 IOCTL_IN(arg, struct cdrom_msf, msf);
2920 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2921 cgc.cmd[3] = msf.cdmsf_min0;
2922 cgc.cmd[4] = msf.cdmsf_sec0;
2923 cgc.cmd[5] = msf.cdmsf_frame0;
2924 cgc.cmd[6] = msf.cdmsf_min1;
2925 cgc.cmd[7] = msf.cdmsf_sec1;
2926 cgc.cmd[8] = msf.cdmsf_frame1;
2927 cgc.data_direction = CGC_DATA_NONE;
2928 return cdo->generic_packet(cdi, &cgc);
2929 }
2930 case CDROMPLAYBLK: {
2931 struct cdrom_blk blk;
2932 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2933 IOCTL_IN(arg, struct cdrom_blk, blk);
2934 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2935 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2936 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2937 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2938 cgc.cmd[5] = blk.from & 0xff;
2939 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2940 cgc.cmd[8] = blk.len & 0xff;
2941 cgc.data_direction = CGC_DATA_NONE;
2942 return cdo->generic_packet(cdi, &cgc);
2943 }
2944 case CDROMVOLCTRL:
2945 case CDROMVOLREAD: {
2946 struct cdrom_volctrl volctrl;
2947 char mask[sizeof(buffer)];
2948 unsigned short offset;
2949
2950 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2951
2952 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2953
2954 cgc.buffer = buffer;
2955 cgc.buflen = 24;
2956 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2957 return ret;
2958
2959 /* originally the code depended on buffer[1] to determine
2960 how much data is available for transfer. buffer[1] is
2961 unfortunately ambigious and the only reliable way seem
2962 to be to simply skip over the block descriptor... */
56052d52 2963 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
1da177e4
LT		 2964
2965 if (offset + 16 > sizeof(buffer))
2966 return -E2BIG;
2967
2968 if (offset + 16 > cgc.buflen) {
2969 cgc.buflen = offset+16;
2970 ret = cdrom_mode_sense(cdi, &cgc,
2971 GPMODE_AUDIO_CTL_PAGE, 0);
2972 if (ret)
2973 return ret;
2974 }
2975
2976 /* sanity check */
2977 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2978 buffer[offset+1] < 14)
2979 return -EINVAL;
2980
2981 /* now we have the current volume settings. if it was only
2982 a CDROMVOLREAD, return these values */
2983 if (cmd == CDROMVOLREAD) {
2984 volctrl.channel0 = buffer[offset+9];
2985 volctrl.channel1 = buffer[offset+11];
2986 volctrl.channel2 = buffer[offset+13];
2987 volctrl.channel3 = buffer[offset+15];
2988 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2989 return 0;
2990 }
2991
2992 /* get the volume mask */
2993 cgc.buffer = mask;
2994 if ((ret = cdrom_mode_sense(cdi, &cgc,
2995 GPMODE_AUDIO_CTL_PAGE, 1)))
2996 return ret;
2997
2998 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2999 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
3000 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
3001 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
3002
3003 /* set volume */
3004 cgc.buffer = buffer + offset - 8;
3005 memset(cgc.buffer, 0, 8);
3006 return cdrom_mode_select(cdi, &cgc);
3007 }
3008
3009 case CDROMSTART:
3010 case CDROMSTOP: {
3011 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3012 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
3013 cgc.cmd[1] = 1;
3014 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3015 cgc.data_direction = CGC_DATA_NONE;
3016 return cdo->generic_packet(cdi, &cgc);
3017 }
3018
3019 case CDROMPAUSE:
3020 case CDROMRESUME: {
3021 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3022 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3023 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3024 cgc.data_direction = CGC_DATA_NONE;
3025 return cdo->generic_packet(cdi, &cgc);
3026 }
3027
3028 case DVD_READ_STRUCT: {
3029 dvd_struct *s;
3030 int size = sizeof(dvd_struct);
3031 if (!CDROM_CAN(CDC_DVD))
3032 return -ENOSYS;
5cbded58 3033 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 3034 return -ENOMEM;
3035 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3036 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3037 kfree(s);
3038 return -EFAULT;
3039 }
3040 if ((ret = dvd_read_struct(cdi, s))) {
3041 kfree(s);
3042 return ret;
3043 }
3044 if (copy_to_user((dvd_struct __user *)arg, s, size))
3045 ret = -EFAULT;
3046 kfree(s);
3047 return ret;
3048 }
3049
3050 case DVD_AUTH: {
3051 dvd_authinfo ai;
3052 if (!CDROM_CAN(CDC_DVD))
3053 return -ENOSYS;
3054 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3055 IOCTL_IN(arg, dvd_authinfo, ai);
3056 if ((ret = dvd_do_auth (cdi, &ai)))
3057 return ret;
3058 IOCTL_OUT(arg, dvd_authinfo, ai);
3059 return 0;
3060 }
3061
3062 case CDROM_NEXT_WRITABLE: {
3063 long next = 0;
3064 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3065 if ((ret = cdrom_get_next_writable(cdi, &next)))
3066 return ret;
3067 IOCTL_OUT(arg, long, next);
3068 return 0;
3069 }
3070 case CDROM_LAST_WRITTEN: {
3071 long last = 0;
3072 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3073 if ((ret = cdrom_get_last_written(cdi, &last)))
3074 return ret;
3075 IOCTL_OUT(arg, long, last);
3076 return 0;
3077 }
3078 } /* switch */
3079
3080 return -ENOTTY;
3081}
3082
3083static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3084 track_information *ti)
3085{
3086 struct cdrom_device_ops *cdo = cdi->ops;
3087 struct packet_command cgc;
3088 int ret, buflen;
3089
3090 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3091 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3092 cgc.cmd[1] = type & 3;
3093 cgc.cmd[4] = (track & 0xff00) >> 8;
3094 cgc.cmd[5] = track & 0xff;
3095 cgc.cmd[8] = 8;
3096 cgc.quiet = 1;
3097
3098 if ((ret = cdo->generic_packet(cdi, &cgc)))
3099 return ret;
3100
3101 buflen = be16_to_cpu(ti->track_information_length) +
3102 sizeof(ti->track_information_length);
3103
3104 if (buflen > sizeof(track_information))
3105 buflen = sizeof(track_information);
3106
3107 cgc.cmd[8] = cgc.buflen = buflen;
3108 if ((ret = cdo->generic_packet(cdi, &cgc)))
3109 return ret;
3110
3111 /* return actual fill size */
3112 return buflen;
3113}
3114
3115/* requires CD R/RW */
3116static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3117{
3118 struct cdrom_device_ops *cdo = cdi->ops;
3119 struct packet_command cgc;
3120 int ret, buflen;
3121
3122 /* set up command and get the disc info */
3123 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3124 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3125 cgc.cmd[8] = cgc.buflen = 2;
3126 cgc.quiet = 1;
3127
3128 if ((ret = cdo->generic_packet(cdi, &cgc)))
3129 return ret;
3130
3131 /* not all drives have the same disc_info length, so requeue
3132 * packet with the length the drive tells us it can supply
3133 */
3134 buflen = be16_to_cpu(di->disc_information_length) +
3135 sizeof(di->disc_information_length);
3136
3137 if (buflen > sizeof(disc_information))
3138 buflen = sizeof(disc_information);
3139
3140 cgc.cmd[8] = cgc.buflen = buflen;
3141 if ((ret = cdo->generic_packet(cdi, &cgc)))
3142 return ret;
3143
3144 /* return actual fill size */
3145 return buflen;
3146}
3147
3148/* return the last written block on the CD-R media. this is for the udf
3149 file system. */
3150int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3151{
3152 struct cdrom_tocentry toc;
3153 disc_information di;
3154 track_information ti;
3155 __u32 last_track;
3156 int ret = -1, ti_size;
3157
3158 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3159 goto use_toc;
3160
3161 ret = cdrom_get_disc_info(cdi, &di);
3162 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3163 + sizeof(di.last_track_lsb)))
3164 goto use_toc;
3165
3166 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3167 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3168 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3169 if (ti_size < (int)offsetof(typeof(ti), track_start))
3170 goto use_toc;
3171
3172 /* if this track is blank, try the previous. */
3173 if (ti.blank) {
3174 if (last_track==1)
3175 goto use_toc;
3176 last_track--;
3177 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3178 }
3179
3180 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3181 + sizeof(ti.track_size)))
3182 goto use_toc;
3183
3184 /* if last recorded field is valid, return it. */
3185 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3186 + sizeof(ti.last_rec_address))) {
3187 *last_written = be32_to_cpu(ti.last_rec_address);
3188 } else {
3189 /* make it up instead */
3190 *last_written = be32_to_cpu(ti.track_start) +
3191 be32_to_cpu(ti.track_size);
3192 if (ti.free_blocks)
3193 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3194 }
3195 return 0;
3196
3197 /* this is where we end up if the drive either can't do a
3198 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3199 it doesn't give enough information or fails. then we return
3200 the toc contents. */
3201use_toc:
3202 toc.cdte_format = CDROM_MSF;
3203 toc.cdte_track = CDROM_LEADOUT;
3204 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3205 return ret;
3206 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3207 *last_written = toc.cdte_addr.lba;
3208 return 0;
3209}
3210
3211/* return the next writable block. also for udf file system. */
3212static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3213{
3214 disc_information di;
3215 track_information ti;
3216 __u16 last_track;
3217 int ret, ti_size;
3218
3219 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3220 goto use_last_written;
3221
3222 ret = cdrom_get_disc_info(cdi, &di);
3223 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3224 + sizeof(di.last_track_lsb))
3225 goto use_last_written;
3226
3227 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3228 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3229 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3230 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3231 goto use_last_written;
3232
3233 /* if this track is blank, try the previous. */
3234 if (ti.blank) {
3235 if (last_track == 1)
3236 goto use_last_written;
3237 last_track--;
3238 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3239 if (ti_size < 0)
3240 goto use_last_written;
3241 }
3242
3243 /* if next recordable address field is valid, use it. */
3244 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3245 + sizeof(ti.next_writable)) {
3246 *next_writable = be32_to_cpu(ti.next_writable);
3247 return 0;
3248 }
3249
3250use_last_written:
3251 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3252 *next_writable = 0;
3253 return ret;
3254 } else {
3255 *next_writable += 7;
3256 return 0;
3257 }
3258}
3259
3260EXPORT_SYMBOL(cdrom_get_last_written);
3261EXPORT_SYMBOL(register_cdrom);
3262EXPORT_SYMBOL(unregister_cdrom);
3263EXPORT_SYMBOL(cdrom_open);
3264EXPORT_SYMBOL(cdrom_release);
3265EXPORT_SYMBOL(cdrom_ioctl);
3266EXPORT_SYMBOL(cdrom_media_changed);
3267EXPORT_SYMBOL(cdrom_number_of_slots);
3268EXPORT_SYMBOL(cdrom_mode_select);
3269EXPORT_SYMBOL(cdrom_mode_sense);
3270EXPORT_SYMBOL(init_cdrom_command);
3271EXPORT_SYMBOL(cdrom_get_media_event);
3272
3273#ifdef CONFIG_SYSCTL
3274
3275#define CDROM_STR_SIZE 1000
3276
3277static struct cdrom_sysctl_settings {
3278 char info[CDROM_STR_SIZE]; /* general info */
3279 int autoclose; /* close tray upon mount, etc */
3280 int autoeject; /* eject on umount */
3281 int debug; /* turn on debugging messages */
3282 int lock; /* lock the door on device open */
3283 int check; /* check media type */
3284} cdrom_sysctl_settings;
3285
3286static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3287 void __user *buffer, size_t *lenp, loff_t *ppos)
3288{
3289 int pos;
3290 struct cdrom_device_info *cdi;
3291 char *info = cdrom_sysctl_settings.info;
3292
3293 if (!*lenp || (*ppos && !write)) {
3294 *lenp = 0;
3295 return 0;
3296 }
3297
3298 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3299
3300 pos += sprintf(info+pos, "\ndrive name:\t");
3301 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3302 pos += sprintf(info+pos, "\t%s", cdi->name);
3303
3304 pos += sprintf(info+pos, "\ndrive speed:\t");
3305 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3306 pos += sprintf(info+pos, "\t%d", cdi->speed);
3307
3308 pos += sprintf(info+pos, "\ndrive # of slots:");
3309 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3310 pos += sprintf(info+pos, "\t%d", cdi->capacity);
3311
3312 pos += sprintf(info+pos, "\nCan close tray:\t");
3313 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3314 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0);
3315
3316 pos += sprintf(info+pos, "\nCan open tray:\t");
3317 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3318 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0);
3319
3320 pos += sprintf(info+pos, "\nCan lock tray:\t");
3321 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3322 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0);
3323
3324 pos += sprintf(info+pos, "\nCan change speed:");
3325 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3326 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0);
3327
3328 pos += sprintf(info+pos, "\nCan select disk:");
3329 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3330 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0);
3331
3332 pos += sprintf(info+pos, "\nCan read multisession:");
3333 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3334 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0);
3335
3336 pos += sprintf(info+pos, "\nCan read MCN:\t");
3337 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3338 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0);
3339
3340 pos += sprintf(info+pos, "\nReports media changed:");
3341 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3342 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0);
3343
3344 pos += sprintf(info+pos, "\nCan play audio:\t");
3345 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3346 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0);
3347
3348 pos += sprintf(info+pos, "\nCan write CD-R:\t");
3349 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3350 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0);
3351
3352 pos += sprintf(info+pos, "\nCan write CD-RW:");
3353 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3354 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0);
3355
3356 pos += sprintf(info+pos, "\nCan read DVD:\t");
3357 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3358 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0);
3359
3360 pos += sprintf(info+pos, "\nCan write DVD-R:");
3361 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3362 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0);
3363
3364 pos += sprintf(info+pos, "\nCan write DVD-RAM:");
3365 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3366 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0);
3367
3368 pos += sprintf(info+pos, "\nCan read MRW:\t");
3369 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3370 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0);
3371
3372 pos += sprintf(info+pos, "\nCan write MRW:\t");
3373 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3374 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0);
3375
3376 pos += sprintf(info+pos, "\nCan write RAM:\t");
3377 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3378 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0);
3379
3380 strcpy(info+pos,"\n\n");
3381
3382 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3383}
3384
3385/* Unfortunately, per device settings are not implemented through
3386 procfs/sysctl yet. When they are, this will naturally disappear. For now
3387 just update all drives. Later this will become the template on which
3388 new registered drives will be based. */
3389static void cdrom_update_settings(void)
3390{
3391 struct cdrom_device_info *cdi;
3392
3393 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
3394 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3395 cdi->options |= CDO_AUTO_CLOSE;
3396 else if (!autoclose)
3397 cdi->options &= ~CDO_AUTO_CLOSE;
3398 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3399 cdi->options |= CDO_AUTO_EJECT;
3400 else if (!autoeject)
3401 cdi->options &= ~CDO_AUTO_EJECT;
3402 if (lockdoor && CDROM_CAN(CDC_LOCK))
3403 cdi->options |= CDO_LOCK;
3404 else if (!lockdoor)
3405 cdi->options &= ~CDO_LOCK;
3406 if (check_media_type)
3407 cdi->options |= CDO_CHECK_TYPE;
3408 else
3409 cdi->options &= ~CDO_CHECK_TYPE;
3410 }
3411}
3412
3413static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3414 void __user *buffer, size_t *lenp, loff_t *ppos)
3415{
3416 int *valp = ctl->data;
3417 int val = *valp;
3418 int ret;
3419
3420 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3421
3422 if (write && *valp != val) {
3423
3424 /* we only care for 1 or 0. */
3425 if (*valp)
3426 *valp = 1;
3427 else
3428 *valp = 0;
3429
3430 switch (ctl->ctl_name) {
3431 case DEV_CDROM_AUTOCLOSE: {
3432 if (valp == &cdrom_sysctl_settings.autoclose)
3433 autoclose = cdrom_sysctl_settings.autoclose;
3434 break;
3435 }
3436 case DEV_CDROM_AUTOEJECT: {
3437 if (valp == &cdrom_sysctl_settings.autoeject)
3438 autoeject = cdrom_sysctl_settings.autoeject;
3439 break;
3440 }
3441 case DEV_CDROM_DEBUG: {
3442 if (valp == &cdrom_sysctl_settings.debug)
3443 debug = cdrom_sysctl_settings.debug;
3444 break;
3445 }
3446 case DEV_CDROM_LOCK: {
3447 if (valp == &cdrom_sysctl_settings.lock)
3448 lockdoor = cdrom_sysctl_settings.lock;
3449 break;
3450 }
3451 case DEV_CDROM_CHECK_MEDIA: {
3452 if (valp == &cdrom_sysctl_settings.check)
3453 check_media_type = cdrom_sysctl_settings.check;
3454 break;
3455 }
3456 }
3457 /* update the option flags according to the changes. we
3458 don't have per device options through sysctl yet,
3459 but we will have and then this will disappear. */
3460 cdrom_update_settings();
3461 }
3462
3463 return ret;
3464}
3465
3466/* Place files in /proc/sys/dev/cdrom */
3467static ctl_table cdrom_table[] = {
3468 {
3469 .ctl_name = DEV_CDROM_INFO,
3470 .procname = "info",
3471 .data = &cdrom_sysctl_settings.info,
3472 .maxlen = CDROM_STR_SIZE,
3473 .mode = 0444,
3474 .proc_handler = &cdrom_sysctl_info,
3475 },
3476 {
3477 .ctl_name = DEV_CDROM_AUTOCLOSE,
3478 .procname = "autoclose",
3479 .data = &cdrom_sysctl_settings.autoclose,
3480 .maxlen = sizeof(int),
3481 .mode = 0644,
3482 .proc_handler = &cdrom_sysctl_handler,
3483 },
3484 {
3485 .ctl_name = DEV_CDROM_AUTOEJECT,
3486 .procname = "autoeject",
3487 .data = &cdrom_sysctl_settings.autoeject,
3488 .maxlen = sizeof(int),
3489 .mode = 0644,
3490 .proc_handler = &cdrom_sysctl_handler,
3491 },
3492 {
3493 .ctl_name = DEV_CDROM_DEBUG,
3494 .procname = "debug",
3495 .data = &cdrom_sysctl_settings.debug,
3496 .maxlen = sizeof(int),
3497 .mode = 0644,
3498 .proc_handler = &cdrom_sysctl_handler,
3499 },
3500 {
3501 .ctl_name = DEV_CDROM_LOCK,
3502 .procname = "lock",
3503 .data = &cdrom_sysctl_settings.lock,
3504 .maxlen = sizeof(int),
3505 .mode = 0644,
3506 .proc_handler = &cdrom_sysctl_handler,
3507 },
3508 {
3509 .ctl_name = DEV_CDROM_CHECK_MEDIA,
3510 .procname = "check_media",
3511 .data = &cdrom_sysctl_settings.check,
3512 .maxlen = sizeof(int),
3513 .mode = 0644,
3514 .proc_handler = &cdrom_sysctl_handler
3515 },
3516 { .ctl_name = 0 }
3517};
3518
3519static ctl_table cdrom_cdrom_table[] = {
3520 {
3521 .ctl_name = DEV_CDROM,
3522 .procname = "cdrom",
3523 .maxlen = 0,
3524 .mode = 0555,
3525 .child = cdrom_table,
3526 },
3527 { .ctl_name = 0 }
3528};
3529
3530/* Make sure that /proc/sys/dev is there */
3531static ctl_table cdrom_root_table[] = {
3532 {
3533 .ctl_name = CTL_DEV,
3534 .procname = "dev",
3535 .maxlen = 0,
3536 .mode = 0555,
3537 .child = cdrom_cdrom_table,
3538 },
3539 { .ctl_name = 0 }
3540};
3541static struct ctl_table_header *cdrom_sysctl_header;
3542
3543static void cdrom_sysctl_register(void)
3544{
3545 static int initialized;
3546
3547 if (initialized == 1)
3548 return;
3549
3550 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table, 1);
3551 if (cdrom_root_table->ctl_name && cdrom_root_table->child->de)
3552 cdrom_root_table->child->de->owner = THIS_MODULE;
3553
3554 /* set the defaults */
3555 cdrom_sysctl_settings.autoclose = autoclose;
3556 cdrom_sysctl_settings.autoeject = autoeject;
3557 cdrom_sysctl_settings.debug = debug;
3558 cdrom_sysctl_settings.lock = lockdoor;
3559 cdrom_sysctl_settings.check = check_media_type;
3560
3561 initialized = 1;
3562}
3563
3564static void cdrom_sysctl_unregister(void)
3565{
3566 if (cdrom_sysctl_header)
3567 unregister_sysctl_table(cdrom_sysctl_header);
3568}
3569
3570#endif /* CONFIG_SYSCTL */
3571
3572static int __init cdrom_init(void)
3573{
3574#ifdef CONFIG_SYSCTL
3575 cdrom_sysctl_register();
3576#endif
3577 return 0;
3578}
3579
3580static void __exit cdrom_exit(void)
3581{
3582 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3583#ifdef CONFIG_SYSCTL
3584 cdrom_sysctl_unregister();
3585#endif
3586}
3587
3588module_init(cdrom_init);
3589module_exit(cdrom_exit);
3590MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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