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1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
268#include <linux/module.h>
269#include <linux/fs.h>
270#include <linux/major.h>
271#include <linux/types.h>
272#include <linux/errno.h>
273#include <linux/kernel.h>
274#include <linux/mm.h>
275#include <linux/slab.h>
276#include <linux/cdrom.h>
277#include <linux/sysctl.h>
278#include <linux/proc_fs.h>
279#include <linux/blkpg.h>
280#include <linux/init.h>
281#include <linux/fcntl.h>
282#include <linux/blkdev.h>
283#include <linux/times.h>
284
285#include <asm/uaccess.h>
286
287/* used to tell the module to turn on full debugging messages */
288static bool debug;
289/* default compatibility mode */
290static bool autoclose=1;
291static bool autoeject;
292static bool lockdoor = 1;
293/* will we ever get to use this... sigh. */
294static bool check_media_type;
295/* automatically restart mrw format */
296static bool mrw_format_restart = 1;
297module_param(debug, bool, 0);
298module_param(autoclose, bool, 0);
299module_param(autoeject, bool, 0);
300module_param(lockdoor, bool, 0);
301module_param(check_media_type, bool, 0);
302module_param(mrw_format_restart, bool, 0);
303
304static DEFINE_MUTEX(cdrom_mutex);
305
306static const char *mrw_format_status[] = {
307 "not mrw",
308 "bgformat inactive",
309 "bgformat active",
310 "mrw complete",
311};
312
313static const char *mrw_address_space[] = { "DMA", "GAA" };
314
315#if (ERRLOGMASK != CD_NOTHING)
316#define cd_dbg(type, fmt, ...) \
317do { \
318 if ((ERRLOGMASK & type) || debug == 1) \
319 pr_debug(fmt, ##__VA_ARGS__); \
320} while (0)
321#else
322#define cd_dbg(type, fmt, ...) \
323do { \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
325 pr_debug(fmt, ##__VA_ARGS__); \
326} while (0)
327#endif
328
329/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
330 a lot of places. This macro makes the code more clear. */
331#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
332
333/*
334 * Another popular OS uses 7 seconds as the hard timeout for default
335 * commands, so it is a good choice for us as well.
336 */
337#define CDROM_DEF_TIMEOUT (7 * HZ)
338
339/* Not-exported routines. */
340
341static void cdrom_sysctl_register(void);
342
343static LIST_HEAD(cdrom_list);
344
345static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
347{
348 if (cgc->sense) {
349 cgc->sense->sense_key = 0x05;
350 cgc->sense->asc = 0x20;
351 cgc->sense->ascq = 0x00;
352 }
353
354 cgc->stat = -EIO;
355 return -EIO;
356}
357
358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
359{
360 struct packet_command cgc;
361
362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
364
365 cgc.timeout = 5 * 60 * HZ;
366
367 return cdi->ops->generic_packet(cdi, &cgc);
368}
369
370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
411#define ENSURE(call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 *change_capability &= ~(bits); \
415} while (0)
416
417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
424 char buffer[16];
425
426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
433 return 0;
434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
436 return 0;
437 }
438
439 return 1;
440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
446 unsigned char buffer[16];
447 int ret;
448
449 *write = 0;
450
451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
455 cgc.cmd[8] = sizeof(buffer);
456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
459 return ret;
460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
468 return ret;
469 }
470
471 return 0;
472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
477 unsigned char buffer[12];
478 int ret;
479
480 pr_info("%sstarting format\n", cont ? "Re" : "");
481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
510 pr_info("bgformat failed\n");
511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
544 pr_info("issuing MRW background format suspend\n");
545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
548 if (!ret && cdi->media_written)
549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
558 char buffer[16];
559 int ret, offset, size;
560
561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
562
563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
565
566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
568 return ret;
569
570 mph = (struct mode_page_header *)buffer;
571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
579 return ret;
580
581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
583 return 0;
584}
585
586int register_cdrom(struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 struct cdrom_device_ops *cdo = cdi->ops;
590 int *change_capability = (int *)&cdo->capability; /* hack */
591
592 cd_dbg(CD_OPEN, "entering register_cdrom\n");
593
594 if (cdo->open == NULL || cdo->release == NULL)
595 return -EINVAL;
596 if (!banner_printed) {
597 pr_info("Uniform CD-ROM driver " REVISION "\n");
598 banner_printed = 1;
599 cdrom_sysctl_register();
600 }
601
602 ENSURE(drive_status, CDC_DRIVE_STATUS);
603 if (cdo->check_events == NULL && cdo->media_changed == NULL)
604 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
605 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
606 ENSURE(lock_door, CDC_LOCK);
607 ENSURE(select_speed, CDC_SELECT_SPEED);
608 ENSURE(get_last_session, CDC_MULTI_SESSION);
609 ENSURE(get_mcn, CDC_MCN);
610 ENSURE(reset, CDC_RESET);
611 ENSURE(generic_packet, CDC_GENERIC_PACKET);
612 cdi->mc_flags = 0;
613 cdo->n_minors = 0;
614 cdi->options = CDO_USE_FFLAGS;
615
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
620 if (lockdoor == 1)
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
624
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
627
628 if (cdi->disk)
629 cdi->cdda_method = CDDA_BPC_FULL;
630 else
631 cdi->cdda_method = CDDA_OLD;
632
633 if (!cdo->generic_packet)
634 cdo->generic_packet = cdrom_dummy_generic_packet;
635
636 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
637 mutex_lock(&cdrom_mutex);
638 list_add(&cdi->list, &cdrom_list);
639 mutex_unlock(&cdrom_mutex);
640 return 0;
641}
642#undef ENSURE
643
644void unregister_cdrom(struct cdrom_device_info *cdi)
645{
646 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
647
648 mutex_lock(&cdrom_mutex);
649 list_del(&cdi->list);
650 mutex_unlock(&cdrom_mutex);
651
652 if (cdi->exit)
653 cdi->exit(cdi);
654
655 cdi->ops->n_minors--;
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658
659int cdrom_get_media_event(struct cdrom_device_info *cdi,
660 struct media_event_desc *med)
661{
662 struct packet_command cgc;
663 unsigned char buffer[8];
664 struct event_header *eh = (struct event_header *)buffer;
665
666 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
667 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
668 cgc.cmd[1] = 1; /* IMMED */
669 cgc.cmd[4] = 1 << 4; /* media event */
670 cgc.cmd[8] = sizeof(buffer);
671 cgc.quiet = 1;
672
673 if (cdi->ops->generic_packet(cdi, &cgc))
674 return 1;
675
676 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 return 1;
678
679 if (eh->nea || eh->notification_class != 0x4)
680 return 1;
681
682 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
683 return 0;
684}
685
686static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
687 struct rwrt_feature_desc *rfd)
688{
689 struct packet_command cgc;
690 char buffer[24];
691 int ret;
692
693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
696 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
697 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 return ret;
702
703 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
704 return 0;
705}
706
707static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
708{
709 struct packet_command cgc;
710 char buffer[16];
711 __be16 *feature_code;
712 int ret;
713
714 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
715
716 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
717 cgc.cmd[3] = CDF_HWDM;
718 cgc.cmd[8] = sizeof(buffer);
719 cgc.quiet = 1;
720
721 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
722 return ret;
723
724 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
725 if (be16_to_cpu(*feature_code) == CDF_HWDM)
726 return 0;
727
728 return 1;
729}
730
731
732static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
733{
734 struct rwrt_feature_desc rfd;
735 int ret;
736
737 *write = 0;
738
739 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 return ret;
741
742 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
743 *write = 1;
744
745 return 0;
746}
747
748static int cdrom_media_erasable(struct cdrom_device_info *cdi)
749{
750 disc_information di;
751 int ret;
752
753 ret = cdrom_get_disc_info(cdi, &di);
754 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
755 return -1;
756
757 return di.erasable;
758}
759
760/*
761 * FIXME: check RO bit
762 */
763static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
764{
765 int ret = cdrom_media_erasable(cdi);
766
767 /*
768 * allow writable open if media info read worked and media is
769 * erasable, _or_ if it fails since not all drives support it
770 */
771 if (!ret)
772 return 1;
773
774 return 0;
775}
776
777static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
778{
779 disc_information di;
780 int ret;
781
782 /*
783 * always reset to DMA lba space on open
784 */
785 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
786 pr_err("failed setting lba address space\n");
787 return 1;
788 }
789
790 ret = cdrom_get_disc_info(cdi, &di);
791 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
792 return 1;
793
794 if (!di.erasable)
795 return 1;
796
797 /*
798 * mrw_status
799 * 0 - not MRW formatted
800 * 1 - MRW bgformat started, but not running or complete
801 * 2 - MRW bgformat in progress
802 * 3 - MRW formatting complete
803 */
804 ret = 0;
805 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
806 if (!di.mrw_status)
807 ret = 1;
808 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
809 mrw_format_restart)
810 ret = cdrom_mrw_bgformat(cdi, 1);
811
812 return ret;
813}
814
815static int mo_open_write(struct cdrom_device_info *cdi)
816{
817 struct packet_command cgc;
818 char buffer[255];
819 int ret;
820
821 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
822 cgc.quiet = 1;
823
824 /*
825 * obtain write protect information as per
826 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 */
828
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
830 if (ret)
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 if (ret) {
833 cgc.buflen = 255;
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 }
836
837 /* drive gave us no info, let the user go ahead */
838 if (ret)
839 return 0;
840
841 return buffer[3] & 0x80;
842}
843
844static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
845{
846 struct rwrt_feature_desc rfd;
847 int ret;
848
849 if ((ret = cdrom_has_defect_mgt(cdi)))
850 return ret;
851
852 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
853 return ret;
854 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 ret = !rfd.curr;
856
857 cd_dbg(CD_OPEN, "can open for random write\n");
858 return ret;
859}
860
861static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
862{
863 struct packet_command cgc;
864 char buffer[32];
865 int ret, mmc3_profile;
866
867 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
868
869 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
870 cgc.cmd[1] = 0;
871 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
872 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
873 cgc.quiet = 1;
874
875 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
876 mmc3_profile = 0xffff;
877 else
878 mmc3_profile = (buffer[6] << 8) | buffer[7];
879
880 cdi->mmc3_profile = mmc3_profile;
881}
882
883static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
884{
885 switch (cdi->mmc3_profile) {
886 case 0x12: /* DVD-RAM */
887 case 0x1A: /* DVD+RW */
888 case 0x43: /* BD-RE */
889 return 0;
890 default:
891 return 1;
892 }
893}
894
895/*
896 * returns 0 for ok to open write, non-0 to disallow
897 */
898static int cdrom_open_write(struct cdrom_device_info *cdi)
899{
900 int mrw, mrw_write, ram_write;
901 int ret = 1;
902
903 mrw = 0;
904 if (!cdrom_is_mrw(cdi, &mrw_write))
905 mrw = 1;
906
907 if (CDROM_CAN(CDC_MO_DRIVE))
908 ram_write = 1;
909 else
910 (void) cdrom_is_random_writable(cdi, &ram_write);
911
912 if (mrw)
913 cdi->mask &= ~CDC_MRW;
914 else
915 cdi->mask |= CDC_MRW;
916
917 if (mrw_write)
918 cdi->mask &= ~CDC_MRW_W;
919 else
920 cdi->mask |= CDC_MRW_W;
921
922 if (ram_write)
923 cdi->mask &= ~CDC_RAM;
924 else
925 cdi->mask |= CDC_RAM;
926
927 if (CDROM_CAN(CDC_MRW_W))
928 ret = cdrom_mrw_open_write(cdi);
929 else if (CDROM_CAN(CDC_DVD_RAM))
930 ret = cdrom_dvdram_open_write(cdi);
931 else if (CDROM_CAN(CDC_RAM) &&
932 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
933 ret = cdrom_ram_open_write(cdi);
934 else if (CDROM_CAN(CDC_MO_DRIVE))
935 ret = mo_open_write(cdi);
936 else if (!cdrom_is_dvd_rw(cdi))
937 ret = 0;
938
939 return ret;
940}
941
942static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
943{
944 struct packet_command cgc;
945
946 if (cdi->mmc3_profile != 0x1a) {
947 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
948 return;
949 }
950
951 if (!cdi->media_written) {
952 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
953 return;
954 }
955
956 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
957
958 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
959 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
960 cgc.timeout = 30*HZ;
961 cdi->ops->generic_packet(cdi, &cgc);
962
963 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
964 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
965 cgc.timeout = 3000*HZ;
966 cgc.quiet = 1;
967 cdi->ops->generic_packet(cdi, &cgc);
968
969 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
970 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
971 cgc.cmd[2] = 2; /* Close session */
972 cgc.quiet = 1;
973 cgc.timeout = 3000*HZ;
974 cdi->ops->generic_packet(cdi, &cgc);
975
976 cdi->media_written = 0;
977}
978
979static int cdrom_close_write(struct cdrom_device_info *cdi)
980{
981#if 0
982 return cdrom_flush_cache(cdi);
983#else
984 return 0;
985#endif
986}
987
988/* badly broken, I know. Is due for a fixup anytime. */
989static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
990{
991 struct cdrom_tochdr header;
992 struct cdrom_tocentry entry;
993 int ret, i;
994 tracks->data = 0;
995 tracks->audio = 0;
996 tracks->cdi = 0;
997 tracks->xa = 0;
998 tracks->error = 0;
999 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
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 cd_dbg(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 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cd_dbg(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 cd_dbg(CD_OPEN, "trying to close the tray\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cd_dbg(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 cd_dbg(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 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cd_dbg(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 cd_dbg(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 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1106 }
1107 }
1108
1109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cd_dbg(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 cd_dbg(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 cd_dbg(CD_OPEN, "door locked\n");
1124 }
1125 cd_dbg(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:
1134 cd_dbg(CD_OPEN, "open failed\n");
1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cd_dbg(CD_OPEN, "door unlocked\n");
1138 }
1139 return ret;
1140}
1141
1142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1151 fmode_t mode)
1152{
1153 int ret;
1154
1155 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1156
1157 /* open is event synchronization point, check events first */
1158 check_disk_change(bdev);
1159
1160 /* if this was a O_NONBLOCK open and we should honor the flags,
1161 * do a quick open without drive/disc integrity checks. */
1162 cdi->use_count++;
1163 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1164 ret = cdi->ops->open(cdi, 1);
1165 } else {
1166 ret = open_for_data(cdi);
1167 if (ret)
1168 goto err;
1169 cdrom_mmc3_profile(cdi);
1170 if (mode & FMODE_WRITE) {
1171 ret = -EROFS;
1172 if (cdrom_open_write(cdi))
1173 goto err_release;
1174 if (!CDROM_CAN(CDC_RAM))
1175 goto err_release;
1176 ret = 0;
1177 cdi->media_written = 0;
1178 }
1179 }
1180
1181 if (ret)
1182 goto err;
1183
1184 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1185 cdi->name, cdi->use_count);
1186 return 0;
1187err_release:
1188 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1189 cdi->ops->lock_door(cdi, 0);
1190 cd_dbg(CD_OPEN, "door unlocked\n");
1191 }
1192 cdi->ops->release(cdi);
1193err:
1194 cdi->use_count--;
1195 return ret;
1196}
1197
1198/* This code is similar to that in open_for_data. The routine is called
1199 whenever an audio play operation is requested.
1200*/
1201static int check_for_audio_disc(struct cdrom_device_info * cdi,
1202 struct cdrom_device_ops * cdo)
1203{
1204 int ret;
1205 tracktype tracks;
1206 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1207 if (!(cdi->options & CDO_CHECK_TYPE))
1208 return 0;
1209 if (cdo->drive_status != NULL) {
1210 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1211 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1212 if (ret == CDS_TRAY_OPEN) {
1213 cd_dbg(CD_OPEN, "the tray is open...\n");
1214 /* can/may i close it? */
1215 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1216 cdi->options & CDO_AUTO_CLOSE) {
1217 cd_dbg(CD_OPEN, "trying to close the tray\n");
1218 ret=cdo->tray_move(cdi,0);
1219 if (ret) {
1220 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1221 /* Ignore the error from the low
1222 level driver. We don't care why it
1223 couldn't close the tray. We only care
1224 that there is no disc in the drive,
1225 since that is the _REAL_ problem here.*/
1226 return -ENOMEDIUM;
1227 }
1228 } else {
1229 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1230 return -ENOMEDIUM;
1231 }
1232 /* Ok, the door should be closed now.. Check again */
1233 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1234 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1235 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1236 return -ENOMEDIUM;
1237 }
1238 if (ret!=CDS_DISC_OK) {
1239 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1240 return -EIO;
1241 }
1242 cd_dbg(CD_OPEN, "the tray is now closed\n");
1243 }
1244 }
1245 cdrom_count_tracks(cdi, &tracks);
1246 if (tracks.error)
1247 return(tracks.error);
1248
1249 if (tracks.audio==0)
1250 return -EMEDIUMTYPE;
1251
1252 return 0;
1253}
1254
1255void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1256{
1257 struct cdrom_device_ops *cdo = cdi->ops;
1258 int opened_for_data;
1259
1260 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1261
1262 if (cdi->use_count > 0)
1263 cdi->use_count--;
1264
1265 if (cdi->use_count == 0) {
1266 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1267 cdi->name);
1268 cdrom_dvd_rw_close_write(cdi);
1269
1270 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1271 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1272 cdo->lock_door(cdi, 0);
1273 }
1274 }
1275
1276 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1277 !(mode & FMODE_NDELAY);
1278
1279 /*
1280 * flush cache on last write release
1281 */
1282 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1283 cdrom_close_write(cdi);
1284
1285 cdo->release(cdi);
1286 if (cdi->use_count == 0) { /* last process that closes dev*/
1287 if (opened_for_data &&
1288 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1289 cdo->tray_move(cdi, 1);
1290 }
1291}
1292
1293static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1294 struct cdrom_changer_info *buf)
1295{
1296 struct packet_command cgc;
1297 struct cdrom_device_ops *cdo = cdi->ops;
1298 int length;
1299
1300 /*
1301 * Sanyo changer isn't spec compliant (doesn't use regular change
1302 * LOAD_UNLOAD command, and it doesn't implement the mech status
1303 * command below
1304 */
1305 if (cdi->sanyo_slot) {
1306 buf->hdr.nslots = 3;
1307 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1308 for (length = 0; length < 3; length++) {
1309 buf->slots[length].disc_present = 1;
1310 buf->slots[length].change = 0;
1311 }
1312 return 0;
1313 }
1314
1315 length = sizeof(struct cdrom_mechstat_header) +
1316 cdi->capacity * sizeof(struct cdrom_slot);
1317
1318 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1319 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1320 cgc.cmd[8] = (length >> 8) & 0xff;
1321 cgc.cmd[9] = length & 0xff;
1322 return cdo->generic_packet(cdi, &cgc);
1323}
1324
1325static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1326{
1327 struct cdrom_changer_info *info;
1328 int ret;
1329
1330 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1331 if (cdi->sanyo_slot)
1332 return CDS_NO_INFO;
1333
1334 info = kmalloc(sizeof(*info), GFP_KERNEL);
1335 if (!info)
1336 return -ENOMEM;
1337
1338 if ((ret = cdrom_read_mech_status(cdi, info)))
1339 goto out_free;
1340
1341 if (info->slots[slot].disc_present)
1342 ret = CDS_DISC_OK;
1343 else
1344 ret = CDS_NO_DISC;
1345
1346out_free:
1347 kfree(info);
1348 return ret;
1349}
1350
1351/* Return the number of slots for an ATAPI/SCSI cdrom,
1352 * return 1 if not a changer.
1353 */
1354int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1355{
1356 int status;
1357 int nslots = 1;
1358 struct cdrom_changer_info *info;
1359
1360 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1361 /* cdrom_read_mech_status requires a valid value for capacity: */
1362 cdi->capacity = 0;
1363
1364 info = kmalloc(sizeof(*info), GFP_KERNEL);
1365 if (!info)
1366 return -ENOMEM;
1367
1368 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1369 nslots = info->hdr.nslots;
1370
1371 kfree(info);
1372 return nslots;
1373}
1374
1375
1376/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1377static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1378{
1379 struct packet_command cgc;
1380
1381 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1382 if (cdi->sanyo_slot && slot < 0)
1383 return 0;
1384
1385 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1386 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1387 cgc.cmd[4] = 2 + (slot >= 0);
1388 cgc.cmd[8] = slot;
1389 cgc.timeout = 60 * HZ;
1390
1391 /* The Sanyo 3 CD changer uses byte 7 of the
1392 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1393 using the GPCMD_LOAD_UNLOAD opcode. */
1394 if (cdi->sanyo_slot && -1 < slot) {
1395 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1396 cgc.cmd[7] = slot;
1397 cgc.cmd[4] = cgc.cmd[8] = 0;
1398 cdi->sanyo_slot = slot ? slot : 3;
1399 }
1400
1401 return cdi->ops->generic_packet(cdi, &cgc);
1402}
1403
1404static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1405{
1406 struct cdrom_changer_info *info;
1407 int curslot;
1408 int ret;
1409
1410 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1411 if (!CDROM_CAN(CDC_SELECT_DISC))
1412 return -EDRIVE_CANT_DO_THIS;
1413
1414 if (cdi->ops->check_events)
1415 cdi->ops->check_events(cdi, 0, slot);
1416 else
1417 cdi->ops->media_changed(cdi, slot);
1418
1419 if (slot == CDSL_NONE) {
1420 /* set media changed bits, on both queues */
1421 cdi->mc_flags = 0x3;
1422 return cdrom_load_unload(cdi, -1);
1423 }
1424
1425 info = kmalloc(sizeof(*info), GFP_KERNEL);
1426 if (!info)
1427 return -ENOMEM;
1428
1429 if ((ret = cdrom_read_mech_status(cdi, info))) {
1430 kfree(info);
1431 return ret;
1432 }
1433
1434 curslot = info->hdr.curslot;
1435 kfree(info);
1436
1437 if (cdi->use_count > 1 || cdi->keeplocked) {
1438 if (slot == CDSL_CURRENT) {
1439 return curslot;
1440 } else {
1441 return -EBUSY;
1442 }
1443 }
1444
1445 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1446 which is useful if it had been previously unloaded.
1447 Whether it can or not, it returns the current slot.
1448 Similarly, if slot happens to be the current one, we still
1449 try and load it. */
1450 if (slot == CDSL_CURRENT)
1451 slot = curslot;
1452
1453 /* set media changed bits on both queues */
1454 cdi->mc_flags = 0x3;
1455 if ((ret = cdrom_load_unload(cdi, slot)))
1456 return ret;
1457
1458 return slot;
1459}
1460
1461/*
1462 * As cdrom implements an extra ioctl consumer for media changed
1463 * event, it needs to buffer ->check_events() output, such that event
1464 * is not lost for both the usual VFS and ioctl paths.
1465 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1466 * path.
1467 *
1468 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1469 * called in parallel and buffering fields are accessed without any
1470 * exclusion. The original media_changed code had the same problem.
1471 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1472 * and remove this cruft altogether. It doesn't have much usefulness
1473 * at this point.
1474 */
1475static void cdrom_update_events(struct cdrom_device_info *cdi,
1476 unsigned int clearing)
1477{
1478 unsigned int events;
1479
1480 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1481 cdi->vfs_events |= events;
1482 cdi->ioctl_events |= events;
1483}
1484
1485unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1486 unsigned int clearing)
1487{
1488 unsigned int events;
1489
1490 cdrom_update_events(cdi, clearing);
1491 events = cdi->vfs_events;
1492 cdi->vfs_events = 0;
1493 return events;
1494}
1495EXPORT_SYMBOL(cdrom_check_events);
1496
1497/* We want to make media_changed accessible to the user through an
1498 * ioctl. The main problem now is that we must double-buffer the
1499 * low-level implementation, to assure that the VFS and the user both
1500 * see a medium change once.
1501 */
1502
1503static
1504int media_changed(struct cdrom_device_info *cdi, int queue)
1505{
1506 unsigned int mask = (1 << (queue & 1));
1507 int ret = !!(cdi->mc_flags & mask);
1508 bool changed;
1509
1510 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1511 return ret;
1512
1513 /* changed since last call? */
1514 if (cdi->ops->check_events) {
1515 BUG_ON(!queue); /* shouldn't be called from VFS path */
1516 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1517 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1518 cdi->ioctl_events = 0;
1519 } else
1520 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1521
1522 if (changed) {
1523 cdi->mc_flags = 0x3; /* set bit on both queues */
1524 ret |= 1;
1525 cdi->media_written = 0;
1526 }
1527
1528 cdi->mc_flags &= ~mask; /* clear bit */
1529 return ret;
1530}
1531
1532int cdrom_media_changed(struct cdrom_device_info *cdi)
1533{
1534 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1535 * Returning "0" is always safe (media hasn't been changed). Do that
1536 * if the low-level cdrom driver dosn't support media changed. */
1537 if (cdi == NULL || cdi->ops->media_changed == NULL)
1538 return 0;
1539 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1540 return 0;
1541 return media_changed(cdi, 0);
1542}
1543
1544/* Requests to the low-level drivers will /always/ be done in the
1545 following format convention:
1546
1547 CDROM_LBA: all data-related requests.
1548 CDROM_MSF: all audio-related requests.
1549
1550 However, a low-level implementation is allowed to refuse this
1551 request, and return information in its own favorite format.
1552
1553 It doesn't make sense /at all/ to ask for a play_audio in LBA
1554 format, or ask for multi-session info in MSF format. However, for
1555 backward compatibility these format requests will be satisfied, but
1556 the requests to the low-level drivers will be sanitized in the more
1557 meaningful format indicated above.
1558 */
1559
1560static
1561void sanitize_format(union cdrom_addr *addr,
1562 u_char * curr, u_char requested)
1563{
1564 if (*curr == requested)
1565 return; /* nothing to be done! */
1566 if (requested == CDROM_LBA) {
1567 addr->lba = (int) addr->msf.frame +
1568 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1569 } else { /* CDROM_MSF */
1570 int lba = addr->lba;
1571 addr->msf.frame = lba % 75;
1572 lba /= 75;
1573 lba += 2;
1574 addr->msf.second = lba % 60;
1575 addr->msf.minute = lba / 60;
1576 }
1577 *curr = requested;
1578}
1579
1580void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1581 int type)
1582{
1583 memset(cgc, 0, sizeof(struct packet_command));
1584 if (buf)
1585 memset(buf, 0, len);
1586 cgc->buffer = (char *) buf;
1587 cgc->buflen = len;
1588 cgc->data_direction = type;
1589 cgc->timeout = CDROM_DEF_TIMEOUT;
1590}
1591
1592/* DVD handling */
1593
1594#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1595#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1596
1597static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1598{
1599 cgc->cmd[0] = GPCMD_REPORT_KEY;
1600 cgc->cmd[10] = type | (agid << 6);
1601 switch (type) {
1602 case 0: case 8: case 5: {
1603 cgc->buflen = 8;
1604 break;
1605 }
1606 case 1: {
1607 cgc->buflen = 16;
1608 break;
1609 }
1610 case 2: case 4: {
1611 cgc->buflen = 12;
1612 break;
1613 }
1614 }
1615 cgc->cmd[9] = cgc->buflen;
1616 cgc->data_direction = CGC_DATA_READ;
1617}
1618
1619static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1620{
1621 cgc->cmd[0] = GPCMD_SEND_KEY;
1622 cgc->cmd[10] = type | (agid << 6);
1623 switch (type) {
1624 case 1: {
1625 cgc->buflen = 16;
1626 break;
1627 }
1628 case 3: {
1629 cgc->buflen = 12;
1630 break;
1631 }
1632 case 6: {
1633 cgc->buflen = 8;
1634 break;
1635 }
1636 }
1637 cgc->cmd[9] = cgc->buflen;
1638 cgc->data_direction = CGC_DATA_WRITE;
1639}
1640
1641static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1642{
1643 int ret;
1644 u_char buf[20];
1645 struct packet_command cgc;
1646 struct cdrom_device_ops *cdo = cdi->ops;
1647 rpc_state_t rpc_state;
1648
1649 memset(buf, 0, sizeof(buf));
1650 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1651
1652 switch (ai->type) {
1653 /* LU data send */
1654 case DVD_LU_SEND_AGID:
1655 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1656 cgc.quiet = 1;
1657 setup_report_key(&cgc, ai->lsa.agid, 0);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
1660 return ret;
1661
1662 ai->lsa.agid = buf[7] >> 6;
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_KEY1:
1667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1668 setup_report_key(&cgc, ai->lsk.agid, 2);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
1671 return ret;
1672
1673 copy_key(ai->lsk.key, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 case DVD_LU_SEND_CHALLENGE:
1678 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1679 setup_report_key(&cgc, ai->lsc.agid, 1);
1680
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
1682 return ret;
1683
1684 copy_chal(ai->lsc.chal, &buf[4]);
1685 /* Returning data, let host change state */
1686 break;
1687
1688 /* Post-auth key */
1689 case DVD_LU_SEND_TITLE_KEY:
1690 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1691 cgc.quiet = 1;
1692 setup_report_key(&cgc, ai->lstk.agid, 4);
1693 cgc.cmd[5] = ai->lstk.lba;
1694 cgc.cmd[4] = ai->lstk.lba >> 8;
1695 cgc.cmd[3] = ai->lstk.lba >> 16;
1696 cgc.cmd[2] = ai->lstk.lba >> 24;
1697
1698 if ((ret = cdo->generic_packet(cdi, &cgc)))
1699 return ret;
1700
1701 ai->lstk.cpm = (buf[4] >> 7) & 1;
1702 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1703 ai->lstk.cgms = (buf[4] >> 4) & 3;
1704 copy_key(ai->lstk.title_key, &buf[5]);
1705 /* Returning data, let host change state */
1706 break;
1707
1708 case DVD_LU_SEND_ASF:
1709 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1710 setup_report_key(&cgc, ai->lsasf.agid, 5);
1711
1712 if ((ret = cdo->generic_packet(cdi, &cgc)))
1713 return ret;
1714
1715 ai->lsasf.asf = buf[7] & 1;
1716 break;
1717
1718 /* LU data receive (LU changes state) */
1719 case DVD_HOST_SEND_CHALLENGE:
1720 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1721 setup_send_key(&cgc, ai->hsc.agid, 1);
1722 buf[1] = 0xe;
1723 copy_chal(&buf[4], ai->hsc.chal);
1724
1725 if ((ret = cdo->generic_packet(cdi, &cgc)))
1726 return ret;
1727
1728 ai->type = DVD_LU_SEND_KEY1;
1729 break;
1730
1731 case DVD_HOST_SEND_KEY2:
1732 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1733 setup_send_key(&cgc, ai->hsk.agid, 3);
1734 buf[1] = 0xa;
1735 copy_key(&buf[4], ai->hsk.key);
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1738 ai->type = DVD_AUTH_FAILURE;
1739 return ret;
1740 }
1741 ai->type = DVD_AUTH_ESTABLISHED;
1742 break;
1743
1744 /* Misc */
1745 case DVD_INVALIDATE_AGID:
1746 cgc.quiet = 1;
1747 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1748 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
1750 return ret;
1751 break;
1752
1753 /* Get region settings */
1754 case DVD_LU_SEND_RPC_STATE:
1755 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1756 setup_report_key(&cgc, 0, 8);
1757 memset(&rpc_state, 0, sizeof(rpc_state_t));
1758 cgc.buffer = (char *) &rpc_state;
1759
1760 if ((ret = cdo->generic_packet(cdi, &cgc)))
1761 return ret;
1762
1763 ai->lrpcs.type = rpc_state.type_code;
1764 ai->lrpcs.vra = rpc_state.vra;
1765 ai->lrpcs.ucca = rpc_state.ucca;
1766 ai->lrpcs.region_mask = rpc_state.region_mask;
1767 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1768 break;
1769
1770 /* Set region settings */
1771 case DVD_HOST_SEND_RPC_STATE:
1772 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1773 setup_send_key(&cgc, 0, 6);
1774 buf[1] = 6;
1775 buf[4] = ai->hrpcs.pdrc;
1776
1777 if ((ret = cdo->generic_packet(cdi, &cgc)))
1778 return ret;
1779 break;
1780
1781 default:
1782 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1783 return -ENOTTY;
1784 }
1785
1786 return 0;
1787}
1788
1789static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1790 struct packet_command *cgc)
1791{
1792 unsigned char buf[21], *base;
1793 struct dvd_layer *layer;
1794 struct cdrom_device_ops *cdo = cdi->ops;
1795 int ret, layer_num = s->physical.layer_num;
1796
1797 if (layer_num >= DVD_LAYERS)
1798 return -EINVAL;
1799
1800 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1801 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc->cmd[6] = layer_num;
1803 cgc->cmd[7] = s->type;
1804 cgc->cmd[9] = cgc->buflen & 0xff;
1805
1806 /*
1807 * refrain from reporting errors on non-existing layers (mainly)
1808 */
1809 cgc->quiet = 1;
1810
1811 ret = cdo->generic_packet(cdi, cgc);
1812 if (ret)
1813 return ret;
1814
1815 base = &buf[4];
1816 layer = &s->physical.layer[layer_num];
1817
1818 /*
1819 * place the data... really ugly, but at least we won't have to
1820 * worry about endianess in userspace.
1821 */
1822 memset(layer, 0, sizeof(*layer));
1823 layer->book_version = base[0] & 0xf;
1824 layer->book_type = base[0] >> 4;
1825 layer->min_rate = base[1] & 0xf;
1826 layer->disc_size = base[1] >> 4;
1827 layer->layer_type = base[2] & 0xf;
1828 layer->track_path = (base[2] >> 4) & 1;
1829 layer->nlayers = (base[2] >> 5) & 3;
1830 layer->track_density = base[3] & 0xf;
1831 layer->linear_density = base[3] >> 4;
1832 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1833 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1834 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1835 layer->bca = base[16] >> 7;
1836
1837 return 0;
1838}
1839
1840static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1841 struct packet_command *cgc)
1842{
1843 int ret;
1844 u_char buf[8];
1845 struct cdrom_device_ops *cdo = cdi->ops;
1846
1847 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1848 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1849 cgc->cmd[6] = s->copyright.layer_num;
1850 cgc->cmd[7] = s->type;
1851 cgc->cmd[8] = cgc->buflen >> 8;
1852 cgc->cmd[9] = cgc->buflen & 0xff;
1853
1854 ret = cdo->generic_packet(cdi, cgc);
1855 if (ret)
1856 return ret;
1857
1858 s->copyright.cpst = buf[4];
1859 s->copyright.rmi = buf[5];
1860
1861 return 0;
1862}
1863
1864static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1865 struct packet_command *cgc)
1866{
1867 int ret, size;
1868 u_char *buf;
1869 struct cdrom_device_ops *cdo = cdi->ops;
1870
1871 size = sizeof(s->disckey.value) + 4;
1872
1873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
1875 return -ENOMEM;
1876
1877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[8] = size >> 8;
1881 cgc->cmd[9] = size & 0xff;
1882 cgc->cmd[10] = s->disckey.agid << 6;
1883
1884 ret = cdo->generic_packet(cdi, cgc);
1885 if (!ret)
1886 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1887
1888 kfree(buf);
1889 return ret;
1890}
1891
1892static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1893 struct packet_command *cgc)
1894{
1895 int ret, size = 4 + 188;
1896 u_char *buf;
1897 struct cdrom_device_ops *cdo = cdi->ops;
1898
1899 buf = kmalloc(size, GFP_KERNEL);
1900 if (!buf)
1901 return -ENOMEM;
1902
1903 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1904 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1905 cgc->cmd[7] = s->type;
1906 cgc->cmd[9] = cgc->buflen & 0xff;
1907
1908 ret = cdo->generic_packet(cdi, cgc);
1909 if (ret)
1910 goto out;
1911
1912 s->bca.len = buf[0] << 8 | buf[1];
1913 if (s->bca.len < 12 || s->bca.len > 188) {
1914 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1915 s->bca.len);
1916 ret = -EIO;
1917 goto out;
1918 }
1919 memcpy(s->bca.value, &buf[4], s->bca.len);
1920 ret = 0;
1921out:
1922 kfree(buf);
1923 return ret;
1924}
1925
1926static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1927 struct packet_command *cgc)
1928{
1929 int ret = 0, size;
1930 u_char *buf;
1931 struct cdrom_device_ops *cdo = cdi->ops;
1932
1933 size = sizeof(s->manufact.value) + 4;
1934
1935 buf = kmalloc(size, GFP_KERNEL);
1936 if (!buf)
1937 return -ENOMEM;
1938
1939 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1940 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1941 cgc->cmd[7] = s->type;
1942 cgc->cmd[8] = size >> 8;
1943 cgc->cmd[9] = size & 0xff;
1944
1945 ret = cdo->generic_packet(cdi, cgc);
1946 if (ret)
1947 goto out;
1948
1949 s->manufact.len = buf[0] << 8 | buf[1];
1950 if (s->manufact.len < 0) {
1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1952 s->manufact.len);
1953 ret = -EIO;
1954 } else {
1955 if (s->manufact.len > 2048) {
1956 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1957 s->manufact.len);
1958 s->manufact.len = 2048;
1959 }
1960 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1961 }
1962
1963out:
1964 kfree(buf);
1965 return ret;
1966}
1967
1968static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1969 struct packet_command *cgc)
1970{
1971 switch (s->type) {
1972 case DVD_STRUCT_PHYSICAL:
1973 return dvd_read_physical(cdi, s, cgc);
1974
1975 case DVD_STRUCT_COPYRIGHT:
1976 return dvd_read_copyright(cdi, s, cgc);
1977
1978 case DVD_STRUCT_DISCKEY:
1979 return dvd_read_disckey(cdi, s, cgc);
1980
1981 case DVD_STRUCT_BCA:
1982 return dvd_read_bca(cdi, s, cgc);
1983
1984 case DVD_STRUCT_MANUFACT:
1985 return dvd_read_manufact(cdi, s, cgc);
1986
1987 default:
1988 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1989 s->type);
1990 return -EINVAL;
1991 }
1992}
1993
1994int cdrom_mode_sense(struct cdrom_device_info *cdi,
1995 struct packet_command *cgc,
1996 int page_code, int page_control)
1997{
1998 struct cdrom_device_ops *cdo = cdi->ops;
1999
2000 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2001
2002 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2003 cgc->cmd[2] = page_code | (page_control << 6);
2004 cgc->cmd[7] = cgc->buflen >> 8;
2005 cgc->cmd[8] = cgc->buflen & 0xff;
2006 cgc->data_direction = CGC_DATA_READ;
2007 return cdo->generic_packet(cdi, cgc);
2008}
2009
2010int cdrom_mode_select(struct cdrom_device_info *cdi,
2011 struct packet_command *cgc)
2012{
2013 struct cdrom_device_ops *cdo = cdi->ops;
2014
2015 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2016 memset(cgc->buffer, 0, 2);
2017 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2018 cgc->cmd[1] = 0x10; /* PF */
2019 cgc->cmd[7] = cgc->buflen >> 8;
2020 cgc->cmd[8] = cgc->buflen & 0xff;
2021 cgc->data_direction = CGC_DATA_WRITE;
2022 return cdo->generic_packet(cdi, cgc);
2023}
2024
2025static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2026 struct cdrom_subchnl *subchnl, int mcn)
2027{
2028 struct cdrom_device_ops *cdo = cdi->ops;
2029 struct packet_command cgc;
2030 char buffer[32];
2031 int ret;
2032
2033 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2034 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2035 cgc.cmd[1] = 2; /* MSF addressing */
2036 cgc.cmd[2] = 0x40; /* request subQ data */
2037 cgc.cmd[3] = mcn ? 2 : 1;
2038 cgc.cmd[8] = 16;
2039
2040 if ((ret = cdo->generic_packet(cdi, &cgc)))
2041 return ret;
2042
2043 subchnl->cdsc_audiostatus = cgc.buffer[1];
2044 subchnl->cdsc_format = CDROM_MSF;
2045 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2046 subchnl->cdsc_trk = cgc.buffer[6];
2047 subchnl->cdsc_ind = cgc.buffer[7];
2048
2049 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2050 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2051 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2052 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2053 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2054 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2055
2056 return 0;
2057}
2058
2059/*
2060 * Specific READ_10 interface
2061 */
2062static int cdrom_read_cd(struct cdrom_device_info *cdi,
2063 struct packet_command *cgc, int lba,
2064 int blocksize, int nblocks)
2065{
2066 struct cdrom_device_ops *cdo = cdi->ops;
2067
2068 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2069 cgc->cmd[0] = GPCMD_READ_10;
2070 cgc->cmd[2] = (lba >> 24) & 0xff;
2071 cgc->cmd[3] = (lba >> 16) & 0xff;
2072 cgc->cmd[4] = (lba >> 8) & 0xff;
2073 cgc->cmd[5] = lba & 0xff;
2074 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2075 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2076 cgc->cmd[8] = nblocks & 0xff;
2077 cgc->buflen = blocksize * nblocks;
2078 return cdo->generic_packet(cdi, cgc);
2079}
2080
2081/* very generic interface for reading the various types of blocks */
2082static int cdrom_read_block(struct cdrom_device_info *cdi,
2083 struct packet_command *cgc,
2084 int lba, int nblocks, int format, int blksize)
2085{
2086 struct cdrom_device_ops *cdo = cdi->ops;
2087
2088 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2089 cgc->cmd[0] = GPCMD_READ_CD;
2090 /* expected sector size - cdda,mode1,etc. */
2091 cgc->cmd[1] = format << 2;
2092 /* starting address */
2093 cgc->cmd[2] = (lba >> 24) & 0xff;
2094 cgc->cmd[3] = (lba >> 16) & 0xff;
2095 cgc->cmd[4] = (lba >> 8) & 0xff;
2096 cgc->cmd[5] = lba & 0xff;
2097 /* number of blocks */
2098 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2099 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2100 cgc->cmd[8] = nblocks & 0xff;
2101 cgc->buflen = blksize * nblocks;
2102
2103 /* set the header info returned */
2104 switch (blksize) {
2105 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2106 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2107 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2108 default : cgc->cmd[9] = 0x10;
2109 }
2110
2111 return cdo->generic_packet(cdi, cgc);
2112}
2113
2114static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2115 int lba, int nframes)
2116{
2117 struct packet_command cgc;
2118 int ret = 0;
2119 int nr;
2120
2121 cdi->last_sense = 0;
2122
2123 memset(&cgc, 0, sizeof(cgc));
2124
2125 /*
2126 * start with will ra.nframes size, back down if alloc fails
2127 */
2128 nr = nframes;
2129 do {
2130 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2131 if (cgc.buffer)
2132 break;
2133
2134 nr >>= 1;
2135 } while (nr);
2136
2137 if (!nr)
2138 return -ENOMEM;
2139
2140 cgc.data_direction = CGC_DATA_READ;
2141 while (nframes > 0) {
2142 if (nr > nframes)
2143 nr = nframes;
2144
2145 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2146 if (ret)
2147 break;
2148 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2149 ret = -EFAULT;
2150 break;
2151 }
2152 ubuf += CD_FRAMESIZE_RAW * nr;
2153 nframes -= nr;
2154 lba += nr;
2155 }
2156 kfree(cgc.buffer);
2157 return ret;
2158}
2159
2160static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2161 int lba, int nframes)
2162{
2163 struct request_queue *q = cdi->disk->queue;
2164 struct request *rq;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 cdi->last_sense = 0;
2173
2174 while (nframes) {
2175 nr = nframes;
2176 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2177 nr = 1;
2178 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2179 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2180
2181 len = nr * CD_FRAMESIZE_RAW;
2182
2183 rq = blk_get_request(q, READ, GFP_KERNEL);
2184 if (IS_ERR(rq)) {
2185 ret = PTR_ERR(rq);
2186 break;
2187 }
2188 blk_rq_set_block_pc(rq);
2189
2190 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2191 if (ret) {
2192 blk_put_request(rq);
2193 break;
2194 }
2195
2196 rq->cmd[0] = GPCMD_READ_CD;
2197 rq->cmd[1] = 1 << 2;
2198 rq->cmd[2] = (lba >> 24) & 0xff;
2199 rq->cmd[3] = (lba >> 16) & 0xff;
2200 rq->cmd[4] = (lba >> 8) & 0xff;
2201 rq->cmd[5] = lba & 0xff;
2202 rq->cmd[6] = (nr >> 16) & 0xff;
2203 rq->cmd[7] = (nr >> 8) & 0xff;
2204 rq->cmd[8] = nr & 0xff;
2205 rq->cmd[9] = 0xf8;
2206
2207 rq->cmd_len = 12;
2208 rq->timeout = 60 * HZ;
2209 bio = rq->bio;
2210
2211 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2212 struct request_sense *s = rq->sense;
2213 ret = -EIO;
2214 cdi->last_sense = s->sense_key;
2215 }
2216
2217 if (blk_rq_unmap_user(bio))
2218 ret = -EFAULT;
2219 blk_put_request(rq);
2220
2221 if (ret)
2222 break;
2223
2224 nframes -= nr;
2225 lba += nr;
2226 ubuf += len;
2227 }
2228
2229 return ret;
2230}
2231
2232static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2233 int lba, int nframes)
2234{
2235 int ret;
2236
2237 if (cdi->cdda_method == CDDA_OLD)
2238 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2239
2240retry:
2241 /*
2242 * for anything else than success and io error, we need to retry
2243 */
2244 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2245 if (!ret || ret != -EIO)
2246 return ret;
2247
2248 /*
2249 * I've seen drives get sense 4/8/3 udma crc errors on multi
2250 * frame dma, so drop to single frame dma if we need to
2251 */
2252 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2253 pr_info("dropping to single frame dma\n");
2254 cdi->cdda_method = CDDA_BPC_SINGLE;
2255 goto retry;
2256 }
2257
2258 /*
2259 * so we have an io error of some sort with multi frame dma. if the
2260 * condition wasn't a hardware error
2261 * problems, not for any error
2262 */
2263 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2264 return ret;
2265
2266 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2267 cdi->cdda_method = CDDA_OLD;
2268 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2269}
2270
2271static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2272 void __user *argp)
2273{
2274 struct cdrom_multisession ms_info;
2275 u8 requested_format;
2276 int ret;
2277
2278 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2279
2280 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2281 return -ENOSYS;
2282
2283 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2284 return -EFAULT;
2285
2286 requested_format = ms_info.addr_format;
2287 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2288 return -EINVAL;
2289 ms_info.addr_format = CDROM_LBA;
2290
2291 ret = cdi->ops->get_last_session(cdi, &ms_info);
2292 if (ret)
2293 return ret;
2294
2295 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2296
2297 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2298 return -EFAULT;
2299
2300 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2301 return 0;
2302}
2303
2304static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2305{
2306 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2307
2308 if (!CDROM_CAN(CDC_OPEN_TRAY))
2309 return -ENOSYS;
2310 if (cdi->use_count != 1 || cdi->keeplocked)
2311 return -EBUSY;
2312 if (CDROM_CAN(CDC_LOCK)) {
2313 int ret = cdi->ops->lock_door(cdi, 0);
2314 if (ret)
2315 return ret;
2316 }
2317
2318 return cdi->ops->tray_move(cdi, 1);
2319}
2320
2321static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2322{
2323 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2324
2325 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2326 return -ENOSYS;
2327 return cdi->ops->tray_move(cdi, 0);
2328}
2329
2330static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2331 unsigned long arg)
2332{
2333 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2334
2335 if (!CDROM_CAN(CDC_OPEN_TRAY))
2336 return -ENOSYS;
2337 if (cdi->keeplocked)
2338 return -EBUSY;
2339
2340 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2341 if (arg)
2342 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2343 return 0;
2344}
2345
2346static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
2349 struct cdrom_changer_info *info;
2350 int ret;
2351
2352 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2353
2354 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2355 return -ENOSYS;
2356
2357 /* cannot select disc or select current disc */
2358 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2359 return media_changed(cdi, 1);
2360
2361 if ((unsigned int)arg >= cdi->capacity)
2362 return -EINVAL;
2363
2364 info = kmalloc(sizeof(*info), GFP_KERNEL);
2365 if (!info)
2366 return -ENOMEM;
2367
2368 ret = cdrom_read_mech_status(cdi, info);
2369 if (!ret)
2370 ret = info->slots[arg].change;
2371 kfree(info);
2372 return ret;
2373}
2374
2375static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2376 unsigned long arg)
2377{
2378 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2379
2380 /*
2381 * Options need to be in sync with capability.
2382 * Too late for that, so we have to check each one separately.
2383 */
2384 switch (arg) {
2385 case CDO_USE_FFLAGS:
2386 case CDO_CHECK_TYPE:
2387 break;
2388 case CDO_LOCK:
2389 if (!CDROM_CAN(CDC_LOCK))
2390 return -ENOSYS;
2391 break;
2392 case 0:
2393 return cdi->options;
2394 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2395 default:
2396 if (!CDROM_CAN(arg))
2397 return -ENOSYS;
2398 }
2399 cdi->options |= (int) arg;
2400 return cdi->options;
2401}
2402
2403static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2404 unsigned long arg)
2405{
2406 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2407
2408 cdi->options &= ~(int) arg;
2409 return cdi->options;
2410}
2411
2412static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2413 unsigned long arg)
2414{
2415 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2416
2417 if (!CDROM_CAN(CDC_SELECT_SPEED))
2418 return -ENOSYS;
2419 return cdi->ops->select_speed(cdi, arg);
2420}
2421
2422static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
2425 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2426
2427 if (!CDROM_CAN(CDC_SELECT_DISC))
2428 return -ENOSYS;
2429
2430 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2431 if ((int)arg >= cdi->capacity)
2432 return -EINVAL;
2433 }
2434
2435 /*
2436 * ->select_disc is a hook to allow a driver-specific way of
2437 * seleting disc. However, since there is no equivalent hook for
2438 * cdrom_slot_status this may not actually be useful...
2439 */
2440 if (cdi->ops->select_disc)
2441 return cdi->ops->select_disc(cdi, arg);
2442
2443 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2444 return cdrom_select_disc(cdi, arg);
2445}
2446
2447static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2448 struct block_device *bdev)
2449{
2450 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2451
2452 if (!capable(CAP_SYS_ADMIN))
2453 return -EACCES;
2454 if (!CDROM_CAN(CDC_RESET))
2455 return -ENOSYS;
2456 invalidate_bdev(bdev);
2457 return cdi->ops->reset(cdi);
2458}
2459
2460static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2461 unsigned long arg)
2462{
2463 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2464
2465 if (!CDROM_CAN(CDC_LOCK))
2466 return -EDRIVE_CANT_DO_THIS;
2467
2468 cdi->keeplocked = arg ? 1 : 0;
2469
2470 /*
2471 * Don't unlock the door on multiple opens by default, but allow
2472 * root to do so.
2473 */
2474 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2475 return -EBUSY;
2476 return cdi->ops->lock_door(cdi, arg);
2477}
2478
2479static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
2482 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2483
2484 if (!capable(CAP_SYS_ADMIN))
2485 return -EACCES;
2486 debug = arg ? 1 : 0;
2487 return debug;
2488}
2489
2490static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2491{
2492 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2493 return (cdi->ops->capability & ~cdi->mask);
2494}
2495
2496/*
2497 * The following function is implemented, although very few audio
2498 * discs give Universal Product Code information, which should just be
2499 * the Medium Catalog Number on the box. Note, that the way the code
2500 * is written on the CD is /not/ uniform across all discs!
2501 */
2502static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2503 void __user *argp)
2504{
2505 struct cdrom_mcn mcn;
2506 int ret;
2507
2508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2509
2510 if (!(cdi->ops->capability & CDC_MCN))
2511 return -ENOSYS;
2512 ret = cdi->ops->get_mcn(cdi, &mcn);
2513 if (ret)
2514 return ret;
2515
2516 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2517 return -EFAULT;
2518 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2519 return 0;
2520}
2521
2522static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2523 unsigned long arg)
2524{
2525 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2526
2527 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2528 return -ENOSYS;
2529 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2530 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2531 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2532 if (((int)arg >= cdi->capacity))
2533 return -EINVAL;
2534 return cdrom_slot_status(cdi, arg);
2535}
2536
2537/*
2538 * Ok, this is where problems start. The current interface for the
2539 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2540 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2541 * is often the case, it is also very common for CDs to have some tracks
2542 * with data, and some tracks with audio. Just because I feel like it,
2543 * I declare the following to be the best way to cope. If the CD has ANY
2544 * data tracks on it, it will be returned as a data CD. If it has any XA
2545 * tracks, I will return it as that. Now I could simplify this interface
2546 * by combining these returns with the above, but this more clearly
2547 * demonstrates the problem with the current interface. Too bad this
2548 * wasn't designed to use bitmasks... -Erik
2549 *
2550 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2551 * User level programmers might feel the ioctl is not very useful.
2552 * ---david
2553 */
2554static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2555{
2556 tracktype tracks;
2557
2558 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2559
2560 cdrom_count_tracks(cdi, &tracks);
2561 if (tracks.error)
2562 return tracks.error;
2563
2564 /* Policy mode on */
2565 if (tracks.audio > 0) {
2566 if (!tracks.data && !tracks.cdi && !tracks.xa)
2567 return CDS_AUDIO;
2568 else
2569 return CDS_MIXED;
2570 }
2571
2572 if (tracks.cdi > 0)
2573 return CDS_XA_2_2;
2574 if (tracks.xa > 0)
2575 return CDS_XA_2_1;
2576 if (tracks.data > 0)
2577 return CDS_DATA_1;
2578 /* Policy mode off */
2579
2580 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2581 return CDS_NO_INFO;
2582}
2583
2584static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2585{
2586 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2587 return cdi->capacity;
2588}
2589
2590static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592{
2593 struct cdrom_subchnl q;
2594 u8 requested, back;
2595 int ret;
2596
2597 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2598
2599 if (copy_from_user(&q, argp, sizeof(q)))
2600 return -EFAULT;
2601
2602 requested = q.cdsc_format;
2603 if (requested != CDROM_MSF && requested != CDROM_LBA)
2604 return -EINVAL;
2605 q.cdsc_format = CDROM_MSF;
2606
2607 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2608 if (ret)
2609 return ret;
2610
2611 back = q.cdsc_format; /* local copy */
2612 sanitize_format(&q.cdsc_absaddr, &back, requested);
2613 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2614
2615 if (copy_to_user(argp, &q, sizeof(q)))
2616 return -EFAULT;
2617 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2618 return 0;
2619}
2620
2621static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2622 void __user *argp)
2623{
2624 struct cdrom_tochdr header;
2625 int ret;
2626
2627 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2628
2629 if (copy_from_user(&header, argp, sizeof(header)))
2630 return -EFAULT;
2631
2632 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2633 if (ret)
2634 return ret;
2635
2636 if (copy_to_user(argp, &header, sizeof(header)))
2637 return -EFAULT;
2638 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2639 return 0;
2640}
2641
2642static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2643 void __user *argp)
2644{
2645 struct cdrom_tocentry entry;
2646 u8 requested_format;
2647 int ret;
2648
2649 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2650
2651 if (copy_from_user(&entry, argp, sizeof(entry)))
2652 return -EFAULT;
2653
2654 requested_format = entry.cdte_format;
2655 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2656 return -EINVAL;
2657 /* make interface to low-level uniform */
2658 entry.cdte_format = CDROM_MSF;
2659 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2660 if (ret)
2661 return ret;
2662 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2663
2664 if (copy_to_user(argp, &entry, sizeof(entry)))
2665 return -EFAULT;
2666 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2667 return 0;
2668}
2669
2670static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2671 void __user *argp)
2672{
2673 struct cdrom_msf msf;
2674
2675 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2676
2677 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2678 return -ENOSYS;
2679 if (copy_from_user(&msf, argp, sizeof(msf)))
2680 return -EFAULT;
2681 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2682}
2683
2684static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2685 void __user *argp)
2686{
2687 struct cdrom_ti ti;
2688 int ret;
2689
2690 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2691
2692 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2693 return -ENOSYS;
2694 if (copy_from_user(&ti, argp, sizeof(ti)))
2695 return -EFAULT;
2696
2697 ret = check_for_audio_disc(cdi, cdi->ops);
2698 if (ret)
2699 return ret;
2700 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2701}
2702static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2703 void __user *argp)
2704{
2705 struct cdrom_volctrl volume;
2706
2707 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2708
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710 return -ENOSYS;
2711 if (copy_from_user(&volume, argp, sizeof(volume)))
2712 return -EFAULT;
2713 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2714}
2715
2716static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2717 void __user *argp)
2718{
2719 struct cdrom_volctrl volume;
2720 int ret;
2721
2722 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2723
2724 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2725 return -ENOSYS;
2726
2727 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2728 if (ret)
2729 return ret;
2730
2731 if (copy_to_user(argp, &volume, sizeof(volume)))
2732 return -EFAULT;
2733 return 0;
2734}
2735
2736static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2737 unsigned int cmd)
2738{
2739 int ret;
2740
2741 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2742
2743 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2744 return -ENOSYS;
2745 ret = check_for_audio_disc(cdi, cdi->ops);
2746 if (ret)
2747 return ret;
2748 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2749}
2750
2751/*
2752 * Required when we need to use READ_10 to issue other than 2048 block
2753 * reads
2754 */
2755static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2756{
2757 struct cdrom_device_ops *cdo = cdi->ops;
2758 struct packet_command cgc;
2759 struct modesel_head mh;
2760
2761 memset(&mh, 0, sizeof(mh));
2762 mh.block_desc_length = 0x08;
2763 mh.block_length_med = (size >> 8) & 0xff;
2764 mh.block_length_lo = size & 0xff;
2765
2766 memset(&cgc, 0, sizeof(cgc));
2767 cgc.cmd[0] = 0x15;
2768 cgc.cmd[1] = 1 << 4;
2769 cgc.cmd[4] = 12;
2770 cgc.buflen = sizeof(mh);
2771 cgc.buffer = (char *) &mh;
2772 cgc.data_direction = CGC_DATA_WRITE;
2773 mh.block_desc_length = 0x08;
2774 mh.block_length_med = (size >> 8) & 0xff;
2775 mh.block_length_lo = size & 0xff;
2776
2777 return cdo->generic_packet(cdi, &cgc);
2778}
2779
2780static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2781 __u16 track, __u8 type, track_information *ti)
2782{
2783 struct cdrom_device_ops *cdo = cdi->ops;
2784 struct packet_command cgc;
2785 int ret, buflen;
2786
2787 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2788 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2789 cgc.cmd[1] = type & 3;
2790 cgc.cmd[4] = (track & 0xff00) >> 8;
2791 cgc.cmd[5] = track & 0xff;
2792 cgc.cmd[8] = 8;
2793 cgc.quiet = 1;
2794
2795 ret = cdo->generic_packet(cdi, &cgc);
2796 if (ret)
2797 return ret;
2798
2799 buflen = be16_to_cpu(ti->track_information_length) +
2800 sizeof(ti->track_information_length);
2801
2802 if (buflen > sizeof(track_information))
2803 buflen = sizeof(track_information);
2804
2805 cgc.cmd[8] = cgc.buflen = buflen;
2806 ret = cdo->generic_packet(cdi, &cgc);
2807 if (ret)
2808 return ret;
2809
2810 /* return actual fill size */
2811 return buflen;
2812}
2813
2814/* return the last written block on the CD-R media. this is for the udf
2815 file system. */
2816int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2817{
2818 struct cdrom_tocentry toc;
2819 disc_information di;
2820 track_information ti;
2821 __u32 last_track;
2822 int ret = -1, ti_size;
2823
2824 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2825 goto use_toc;
2826
2827 ret = cdrom_get_disc_info(cdi, &di);
2828 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2829 + sizeof(di.last_track_lsb)))
2830 goto use_toc;
2831
2832 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2833 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2834 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2835 if (ti_size < (int)offsetof(typeof(ti), track_start))
2836 goto use_toc;
2837
2838 /* if this track is blank, try the previous. */
2839 if (ti.blank) {
2840 if (last_track == 1)
2841 goto use_toc;
2842 last_track--;
2843 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2844 }
2845
2846 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2847 + sizeof(ti.track_size)))
2848 goto use_toc;
2849
2850 /* if last recorded field is valid, return it. */
2851 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2852 + sizeof(ti.last_rec_address))) {
2853 *last_written = be32_to_cpu(ti.last_rec_address);
2854 } else {
2855 /* make it up instead */
2856 *last_written = be32_to_cpu(ti.track_start) +
2857 be32_to_cpu(ti.track_size);
2858 if (ti.free_blocks)
2859 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2860 }
2861 return 0;
2862
2863 /* this is where we end up if the drive either can't do a
2864 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2865 it doesn't give enough information or fails. then we return
2866 the toc contents. */
2867use_toc:
2868 toc.cdte_format = CDROM_MSF;
2869 toc.cdte_track = CDROM_LEADOUT;
2870 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2871 return ret;
2872 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2873 *last_written = toc.cdte_addr.lba;
2874 return 0;
2875}
2876
2877/* return the next writable block. also for udf file system. */
2878static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2879 long *next_writable)
2880{
2881 disc_information di;
2882 track_information ti;
2883 __u16 last_track;
2884 int ret, ti_size;
2885
2886 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2887 goto use_last_written;
2888
2889 ret = cdrom_get_disc_info(cdi, &di);
2890 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2891 + sizeof(di.last_track_lsb))
2892 goto use_last_written;
2893
2894 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2895 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2896 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2897 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2898 goto use_last_written;
2899
2900 /* if this track is blank, try the previous. */
2901 if (ti.blank) {
2902 if (last_track == 1)
2903 goto use_last_written;
2904 last_track--;
2905 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2906 if (ti_size < 0)
2907 goto use_last_written;
2908 }
2909
2910 /* if next recordable address field is valid, use it. */
2911 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2912 + sizeof(ti.next_writable)) {
2913 *next_writable = be32_to_cpu(ti.next_writable);
2914 return 0;
2915 }
2916
2917use_last_written:
2918 ret = cdrom_get_last_written(cdi, next_writable);
2919 if (ret) {
2920 *next_writable = 0;
2921 return ret;
2922 } else {
2923 *next_writable += 7;
2924 return 0;
2925 }
2926}
2927
2928static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2929 void __user *arg,
2930 struct packet_command *cgc,
2931 int cmd)
2932{
2933 struct request_sense sense;
2934 struct cdrom_msf msf;
2935 int blocksize = 0, format = 0, lba;
2936 int ret;
2937
2938 switch (cmd) {
2939 case CDROMREADRAW:
2940 blocksize = CD_FRAMESIZE_RAW;
2941 break;
2942 case CDROMREADMODE1:
2943 blocksize = CD_FRAMESIZE;
2944 format = 2;
2945 break;
2946 case CDROMREADMODE2:
2947 blocksize = CD_FRAMESIZE_RAW0;
2948 break;
2949 }
2950 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2951 return -EFAULT;
2952 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2953 /* FIXME: we need upper bound checking, too!! */
2954 if (lba < 0)
2955 return -EINVAL;
2956
2957 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2958 if (cgc->buffer == NULL)
2959 return -ENOMEM;
2960
2961 memset(&sense, 0, sizeof(sense));
2962 cgc->sense = &sense;
2963 cgc->data_direction = CGC_DATA_READ;
2964 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2965 if (ret && sense.sense_key == 0x05 &&
2966 sense.asc == 0x20 &&
2967 sense.ascq == 0x00) {
2968 /*
2969 * SCSI-II devices are not required to support
2970 * READ_CD, so let's try switching block size
2971 */
2972 /* FIXME: switch back again... */
2973 ret = cdrom_switch_blocksize(cdi, blocksize);
2974 if (ret)
2975 goto out;
2976 cgc->sense = NULL;
2977 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2978 ret |= cdrom_switch_blocksize(cdi, blocksize);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2988 void __user *arg)
2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
2993 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
2994 sizeof(ra)))
2995 return -EFAULT;
2996
2997 if (ra.addr_format == CDROM_MSF)
2998 lba = msf_to_lba(ra.addr.msf.minute,
2999 ra.addr.msf.second,
3000 ra.addr.msf.frame);
3001 else if (ra.addr_format == CDROM_LBA)
3002 lba = ra.addr.lba;
3003 else
3004 return -EINVAL;
3005
3006 /* FIXME: we need upper bound checking, too!! */
3007 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3008 return -EINVAL;
3009
3010 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3011}
3012
3013static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3014 void __user *arg)
3015{
3016 int ret;
3017 struct cdrom_subchnl q;
3018 u_char requested, back;
3019 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3020 return -EFAULT;
3021 requested = q.cdsc_format;
3022 if (!((requested == CDROM_MSF) ||
3023 (requested == CDROM_LBA)))
3024 return -EINVAL;
3025 q.cdsc_format = CDROM_MSF;
3026 ret = cdrom_read_subchannel(cdi, &q, 0);
3027 if (ret)
3028 return ret;
3029 back = q.cdsc_format; /* local copy */
3030 sanitize_format(&q.cdsc_absaddr, &back, requested);
3031 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3032 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3033 return -EFAULT;
3034 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3035 return 0;
3036}
3037
3038static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3039 void __user *arg,
3040 struct packet_command *cgc)
3041{
3042 struct cdrom_device_ops *cdo = cdi->ops;
3043 struct cdrom_msf msf;
3044 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3045 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3046 return -EFAULT;
3047 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3048 cgc->cmd[3] = msf.cdmsf_min0;
3049 cgc->cmd[4] = msf.cdmsf_sec0;
3050 cgc->cmd[5] = msf.cdmsf_frame0;
3051 cgc->cmd[6] = msf.cdmsf_min1;
3052 cgc->cmd[7] = msf.cdmsf_sec1;
3053 cgc->cmd[8] = msf.cdmsf_frame1;
3054 cgc->data_direction = CGC_DATA_NONE;
3055 return cdo->generic_packet(cdi, cgc);
3056}
3057
3058static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3059 void __user *arg,
3060 struct packet_command *cgc)
3061{
3062 struct cdrom_device_ops *cdo = cdi->ops;
3063 struct cdrom_blk blk;
3064 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3065 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3066 return -EFAULT;
3067 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3068 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3069 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3070 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3071 cgc->cmd[5] = blk.from & 0xff;
3072 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3073 cgc->cmd[8] = blk.len & 0xff;
3074 cgc->data_direction = CGC_DATA_NONE;
3075 return cdo->generic_packet(cdi, cgc);
3076}
3077
3078static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3079 void __user *arg,
3080 struct packet_command *cgc,
3081 unsigned int cmd)
3082{
3083 struct cdrom_volctrl volctrl;
3084 unsigned char buffer[32];
3085 char mask[sizeof(buffer)];
3086 unsigned short offset;
3087 int ret;
3088
3089 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3090
3091 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3092 sizeof(volctrl)))
3093 return -EFAULT;
3094
3095 cgc->buffer = buffer;
3096 cgc->buflen = 24;
3097 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3098 if (ret)
3099 return ret;
3100
3101 /* originally the code depended on buffer[1] to determine
3102 how much data is available for transfer. buffer[1] is
3103 unfortunately ambigious and the only reliable way seem
3104 to be to simply skip over the block descriptor... */
3105 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3106
3107 if (offset + 16 > sizeof(buffer))
3108 return -E2BIG;
3109
3110 if (offset + 16 > cgc->buflen) {
3111 cgc->buflen = offset + 16;
3112 ret = cdrom_mode_sense(cdi, cgc,
3113 GPMODE_AUDIO_CTL_PAGE, 0);
3114 if (ret)
3115 return ret;
3116 }
3117
3118 /* sanity check */
3119 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3120 buffer[offset + 1] < 14)
3121 return -EINVAL;
3122
3123 /* now we have the current volume settings. if it was only
3124 a CDROMVOLREAD, return these values */
3125 if (cmd == CDROMVOLREAD) {
3126 volctrl.channel0 = buffer[offset+9];
3127 volctrl.channel1 = buffer[offset+11];
3128 volctrl.channel2 = buffer[offset+13];
3129 volctrl.channel3 = buffer[offset+15];
3130 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3131 sizeof(volctrl)))
3132 return -EFAULT;
3133 return 0;
3134 }
3135
3136 /* get the volume mask */
3137 cgc->buffer = mask;
3138 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3139 if (ret)
3140 return ret;
3141
3142 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3143 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3144 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3145 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3146
3147 /* set volume */
3148 cgc->buffer = buffer + offset - 8;
3149 memset(cgc->buffer, 0, 8);
3150 return cdrom_mode_select(cdi, cgc);
3151}
3152
3153static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3154 struct packet_command *cgc,
3155 int cmd)
3156{
3157 struct cdrom_device_ops *cdo = cdi->ops;
3158 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3159 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3160 cgc->cmd[1] = 1;
3161 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3162 cgc->data_direction = CGC_DATA_NONE;
3163 return cdo->generic_packet(cdi, cgc);
3164}
3165
3166static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3167 struct packet_command *cgc,
3168 int cmd)
3169{
3170 struct cdrom_device_ops *cdo = cdi->ops;
3171 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3172 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3173 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3174 cgc->data_direction = CGC_DATA_NONE;
3175 return cdo->generic_packet(cdi, cgc);
3176}
3177
3178static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3179 void __user *arg,
3180 struct packet_command *cgc)
3181{
3182 int ret;
3183 dvd_struct *s;
3184 int size = sizeof(dvd_struct);
3185
3186 if (!CDROM_CAN(CDC_DVD))
3187 return -ENOSYS;
3188
3189 s = memdup_user(arg, size);
3190 if (IS_ERR(s))
3191 return PTR_ERR(s);
3192
3193 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3194
3195 ret = dvd_read_struct(cdi, s, cgc);
3196 if (ret)
3197 goto out;
3198
3199 if (copy_to_user(arg, s, size))
3200 ret = -EFAULT;
3201out:
3202 kfree(s);
3203 return ret;
3204}
3205
3206static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3207 void __user *arg)
3208{
3209 int ret;
3210 dvd_authinfo ai;
3211 if (!CDROM_CAN(CDC_DVD))
3212 return -ENOSYS;
3213 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3214 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3215 return -EFAULT;
3216 ret = dvd_do_auth(cdi, &ai);
3217 if (ret)
3218 return ret;
3219 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3220 return -EFAULT;
3221 return 0;
3222}
3223
3224static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3225 void __user *arg)
3226{
3227 int ret;
3228 long next = 0;
3229 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3230 ret = cdrom_get_next_writable(cdi, &next);
3231 if (ret)
3232 return ret;
3233 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3234 return -EFAULT;
3235 return 0;
3236}
3237
3238static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3239 void __user *arg)
3240{
3241 int ret;
3242 long last = 0;
3243 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3244 ret = cdrom_get_last_written(cdi, &last);
3245 if (ret)
3246 return ret;
3247 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3248 return -EFAULT;
3249 return 0;
3250}
3251
3252static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3253 unsigned long arg)
3254{
3255 struct packet_command cgc;
3256 void __user *userptr = (void __user *)arg;
3257
3258 memset(&cgc, 0, sizeof(cgc));
3259
3260 /* build a unified command and queue it through
3261 cdo->generic_packet() */
3262 switch (cmd) {
3263 case CDROMREADRAW:
3264 case CDROMREADMODE1:
3265 case CDROMREADMODE2:
3266 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3267 case CDROMREADAUDIO:
3268 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3269 case CDROMSUBCHNL:
3270 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3271 case CDROMPLAYMSF:
3272 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3273 case CDROMPLAYBLK:
3274 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3275 case CDROMVOLCTRL:
3276 case CDROMVOLREAD:
3277 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3278 case CDROMSTART:
3279 case CDROMSTOP:
3280 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3281 case CDROMPAUSE:
3282 case CDROMRESUME:
3283 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3284 case DVD_READ_STRUCT:
3285 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3286 case DVD_AUTH:
3287 return mmc_ioctl_dvd_auth(cdi, userptr);
3288 case CDROM_NEXT_WRITABLE:
3289 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3290 case CDROM_LAST_WRITTEN:
3291 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3292 }
3293
3294 return -ENOTTY;
3295}
3296
3297/*
3298 * Just about every imaginable ioctl is supported in the Uniform layer
3299 * these days.
3300 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3301 */
3302int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3303 fmode_t mode, unsigned int cmd, unsigned long arg)
3304{
3305 void __user *argp = (void __user *)arg;
3306 int ret;
3307
3308 /*
3309 * Try the generic SCSI command ioctl's first.
3310 */
3311 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3312 if (ret != -ENOTTY)
3313 return ret;
3314
3315 switch (cmd) {
3316 case CDROMMULTISESSION:
3317 return cdrom_ioctl_multisession(cdi, argp);
3318 case CDROMEJECT:
3319 return cdrom_ioctl_eject(cdi);
3320 case CDROMCLOSETRAY:
3321 return cdrom_ioctl_closetray(cdi);
3322 case CDROMEJECT_SW:
3323 return cdrom_ioctl_eject_sw(cdi, arg);
3324 case CDROM_MEDIA_CHANGED:
3325 return cdrom_ioctl_media_changed(cdi, arg);
3326 case CDROM_SET_OPTIONS:
3327 return cdrom_ioctl_set_options(cdi, arg);
3328 case CDROM_CLEAR_OPTIONS:
3329 return cdrom_ioctl_clear_options(cdi, arg);
3330 case CDROM_SELECT_SPEED:
3331 return cdrom_ioctl_select_speed(cdi, arg);
3332 case CDROM_SELECT_DISC:
3333 return cdrom_ioctl_select_disc(cdi, arg);
3334 case CDROMRESET:
3335 return cdrom_ioctl_reset(cdi, bdev);
3336 case CDROM_LOCKDOOR:
3337 return cdrom_ioctl_lock_door(cdi, arg);
3338 case CDROM_DEBUG:
3339 return cdrom_ioctl_debug(cdi, arg);
3340 case CDROM_GET_CAPABILITY:
3341 return cdrom_ioctl_get_capability(cdi);
3342 case CDROM_GET_MCN:
3343 return cdrom_ioctl_get_mcn(cdi, argp);
3344 case CDROM_DRIVE_STATUS:
3345 return cdrom_ioctl_drive_status(cdi, arg);
3346 case CDROM_DISC_STATUS:
3347 return cdrom_ioctl_disc_status(cdi);
3348 case CDROM_CHANGER_NSLOTS:
3349 return cdrom_ioctl_changer_nslots(cdi);
3350 }
3351
3352 /*
3353 * Use the ioctls that are implemented through the generic_packet()
3354 * interface. this may look at bit funny, but if -ENOTTY is
3355 * returned that particular ioctl is not implemented and we
3356 * let it go through the device specific ones.
3357 */
3358 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3359 ret = mmc_ioctl(cdi, cmd, arg);
3360 if (ret != -ENOTTY)
3361 return ret;
3362 }
3363
3364 /*
3365 * Note: most of the cd_dbg() calls are commented out here,
3366 * because they fill up the sys log when CD players poll
3367 * the drive.
3368 */
3369 switch (cmd) {
3370 case CDROMSUBCHNL:
3371 return cdrom_ioctl_get_subchnl(cdi, argp);
3372 case CDROMREADTOCHDR:
3373 return cdrom_ioctl_read_tochdr(cdi, argp);
3374 case CDROMREADTOCENTRY:
3375 return cdrom_ioctl_read_tocentry(cdi, argp);
3376 case CDROMPLAYMSF:
3377 return cdrom_ioctl_play_msf(cdi, argp);
3378 case CDROMPLAYTRKIND:
3379 return cdrom_ioctl_play_trkind(cdi, argp);
3380 case CDROMVOLCTRL:
3381 return cdrom_ioctl_volctrl(cdi, argp);
3382 case CDROMVOLREAD:
3383 return cdrom_ioctl_volread(cdi, argp);
3384 case CDROMSTART:
3385 case CDROMSTOP:
3386 case CDROMPAUSE:
3387 case CDROMRESUME:
3388 return cdrom_ioctl_audioctl(cdi, cmd);
3389 }
3390
3391 return -ENOSYS;
3392}
3393
3394EXPORT_SYMBOL(cdrom_get_last_written);
3395EXPORT_SYMBOL(register_cdrom);
3396EXPORT_SYMBOL(unregister_cdrom);
3397EXPORT_SYMBOL(cdrom_open);
3398EXPORT_SYMBOL(cdrom_release);
3399EXPORT_SYMBOL(cdrom_ioctl);
3400EXPORT_SYMBOL(cdrom_media_changed);
3401EXPORT_SYMBOL(cdrom_number_of_slots);
3402EXPORT_SYMBOL(cdrom_mode_select);
3403EXPORT_SYMBOL(cdrom_mode_sense);
3404EXPORT_SYMBOL(init_cdrom_command);
3405EXPORT_SYMBOL(cdrom_get_media_event);
3406
3407#ifdef CONFIG_SYSCTL
3408
3409#define CDROM_STR_SIZE 1000
3410
3411static struct cdrom_sysctl_settings {
3412 char info[CDROM_STR_SIZE]; /* general info */
3413 int autoclose; /* close tray upon mount, etc */
3414 int autoeject; /* eject on umount */
3415 int debug; /* turn on debugging messages */
3416 int lock; /* lock the door on device open */
3417 int check; /* check media type */
3418} cdrom_sysctl_settings;
3419
3420enum cdrom_print_option {
3421 CTL_NAME,
3422 CTL_SPEED,
3423 CTL_SLOTS,
3424 CTL_CAPABILITY
3425};
3426
3427static int cdrom_print_info(const char *header, int val, char *info,
3428 int *pos, enum cdrom_print_option option)
3429{
3430 const int max_size = sizeof(cdrom_sysctl_settings.info);
3431 struct cdrom_device_info *cdi;
3432 int ret;
3433
3434 ret = scnprintf(info + *pos, max_size - *pos, header);
3435 if (!ret)
3436 return 1;
3437
3438 *pos += ret;
3439
3440 list_for_each_entry(cdi, &cdrom_list, list) {
3441 switch (option) {
3442 case CTL_NAME:
3443 ret = scnprintf(info + *pos, max_size - *pos,
3444 "\t%s", cdi->name);
3445 break;
3446 case CTL_SPEED:
3447 ret = scnprintf(info + *pos, max_size - *pos,
3448 "\t%d", cdi->speed);
3449 break;
3450 case CTL_SLOTS:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%d", cdi->capacity);
3453 break;
3454 case CTL_CAPABILITY:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", CDROM_CAN(val) != 0);
3457 break;
3458 default:
3459 pr_info("invalid option%d\n", option);
3460 return 1;
3461 }
3462 if (!ret)
3463 return 1;
3464 *pos += ret;
3465 }
3466
3467 return 0;
3468}
3469
3470static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3471 void __user *buffer, size_t *lenp, loff_t *ppos)
3472{
3473 int pos;
3474 char *info = cdrom_sysctl_settings.info;
3475 const int max_size = sizeof(cdrom_sysctl_settings.info);
3476
3477 if (!*lenp || (*ppos && !write)) {
3478 *lenp = 0;
3479 return 0;
3480 }
3481
3482 mutex_lock(&cdrom_mutex);
3483
3484 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3485
3486 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3487 goto done;
3488 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3489 goto done;
3490 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3491 goto done;
3492 if (cdrom_print_info("\nCan close tray:\t",
3493 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3494 goto done;
3495 if (cdrom_print_info("\nCan open tray:\t",
3496 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3497 goto done;
3498 if (cdrom_print_info("\nCan lock tray:\t",
3499 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan change speed:",
3502 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan select disk:",
3505 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan read multisession:",
3508 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan read MCN:\t",
3511 CDC_MCN, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nReports media changed:",
3514 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan play audio:\t",
3517 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nCan write CD-R:\t",
3520 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan write CD-RW:",
3523 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan read DVD:\t",
3526 CDC_DVD, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write DVD-R:",
3529 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan write DVD-RAM:",
3532 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan read MRW:\t",
3535 CDC_MRW, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write MRW:\t",
3538 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan write RAM:\t",
3541 CDC_RAM, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3544 goto done;
3545doit:
3546 mutex_unlock(&cdrom_mutex);
3547 return proc_dostring(ctl, write, buffer, lenp, ppos);
3548done:
3549 pr_info("info buffer too small\n");
3550 goto doit;
3551}
3552
3553/* Unfortunately, per device settings are not implemented through
3554 procfs/sysctl yet. When they are, this will naturally disappear. For now
3555 just update all drives. Later this will become the template on which
3556 new registered drives will be based. */
3557static void cdrom_update_settings(void)
3558{
3559 struct cdrom_device_info *cdi;
3560
3561 mutex_lock(&cdrom_mutex);
3562 list_for_each_entry(cdi, &cdrom_list, list) {
3563 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3564 cdi->options |= CDO_AUTO_CLOSE;
3565 else if (!autoclose)
3566 cdi->options &= ~CDO_AUTO_CLOSE;
3567 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3568 cdi->options |= CDO_AUTO_EJECT;
3569 else if (!autoeject)
3570 cdi->options &= ~CDO_AUTO_EJECT;
3571 if (lockdoor && CDROM_CAN(CDC_LOCK))
3572 cdi->options |= CDO_LOCK;
3573 else if (!lockdoor)
3574 cdi->options &= ~CDO_LOCK;
3575 if (check_media_type)
3576 cdi->options |= CDO_CHECK_TYPE;
3577 else
3578 cdi->options &= ~CDO_CHECK_TYPE;
3579 }
3580 mutex_unlock(&cdrom_mutex);
3581}
3582
3583static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3584 void __user *buffer, size_t *lenp, loff_t *ppos)
3585{
3586 int ret;
3587
3588 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3589
3590 if (write) {
3591
3592 /* we only care for 1 or 0. */
3593 autoclose = !!cdrom_sysctl_settings.autoclose;
3594 autoeject = !!cdrom_sysctl_settings.autoeject;
3595 debug = !!cdrom_sysctl_settings.debug;
3596 lockdoor = !!cdrom_sysctl_settings.lock;
3597 check_media_type = !!cdrom_sysctl_settings.check;
3598
3599 /* update the option flags according to the changes. we
3600 don't have per device options through sysctl yet,
3601 but we will have and then this will disappear. */
3602 cdrom_update_settings();
3603 }
3604
3605 return ret;
3606}
3607
3608/* Place files in /proc/sys/dev/cdrom */
3609static struct ctl_table cdrom_table[] = {
3610 {
3611 .procname = "info",
3612 .data = &cdrom_sysctl_settings.info,
3613 .maxlen = CDROM_STR_SIZE,
3614 .mode = 0444,
3615 .proc_handler = cdrom_sysctl_info,
3616 },
3617 {
3618 .procname = "autoclose",
3619 .data = &cdrom_sysctl_settings.autoclose,
3620 .maxlen = sizeof(int),
3621 .mode = 0644,
3622 .proc_handler = cdrom_sysctl_handler,
3623 },
3624 {
3625 .procname = "autoeject",
3626 .data = &cdrom_sysctl_settings.autoeject,
3627 .maxlen = sizeof(int),
3628 .mode = 0644,
3629 .proc_handler = cdrom_sysctl_handler,
3630 },
3631 {
3632 .procname = "debug",
3633 .data = &cdrom_sysctl_settings.debug,
3634 .maxlen = sizeof(int),
3635 .mode = 0644,
3636 .proc_handler = cdrom_sysctl_handler,
3637 },
3638 {
3639 .procname = "lock",
3640 .data = &cdrom_sysctl_settings.lock,
3641 .maxlen = sizeof(int),
3642 .mode = 0644,
3643 .proc_handler = cdrom_sysctl_handler,
3644 },
3645 {
3646 .procname = "check_media",
3647 .data = &cdrom_sysctl_settings.check,
3648 .maxlen = sizeof(int),
3649 .mode = 0644,
3650 .proc_handler = cdrom_sysctl_handler
3651 },
3652 { }
3653};
3654
3655static struct ctl_table cdrom_cdrom_table[] = {
3656 {
3657 .procname = "cdrom",
3658 .maxlen = 0,
3659 .mode = 0555,
3660 .child = cdrom_table,
3661 },
3662 { }
3663};
3664
3665/* Make sure that /proc/sys/dev is there */
3666static struct ctl_table cdrom_root_table[] = {
3667 {
3668 .procname = "dev",
3669 .maxlen = 0,
3670 .mode = 0555,
3671 .child = cdrom_cdrom_table,
3672 },
3673 { }
3674};
3675static struct ctl_table_header *cdrom_sysctl_header;
3676
3677static void cdrom_sysctl_register(void)
3678{
3679 static int initialized;
3680
3681 if (initialized == 1)
3682 return;
3683
3684 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3685
3686 /* set the defaults */
3687 cdrom_sysctl_settings.autoclose = autoclose;
3688 cdrom_sysctl_settings.autoeject = autoeject;
3689 cdrom_sysctl_settings.debug = debug;
3690 cdrom_sysctl_settings.lock = lockdoor;
3691 cdrom_sysctl_settings.check = check_media_type;
3692
3693 initialized = 1;
3694}
3695
3696static void cdrom_sysctl_unregister(void)
3697{
3698 if (cdrom_sysctl_header)
3699 unregister_sysctl_table(cdrom_sysctl_header);
3700}
3701
3702#else /* CONFIG_SYSCTL */
3703
3704static void cdrom_sysctl_register(void)
3705{
3706}
3707
3708static void cdrom_sysctl_unregister(void)
3709{
3710}
3711
3712#endif /* CONFIG_SYSCTL */
3713
3714static int __init cdrom_init(void)
3715{
3716 cdrom_sysctl_register();
3717
3718 return 0;
3719}
3720
3721static void __exit cdrom_exit(void)
3722{
3723 pr_info("Uniform CD-ROM driver unloaded\n");
3724 cdrom_sysctl_unregister();
3725}
3726
3727module_init(cdrom_init);
3728module_exit(cdrom_exit);
3729MODULE_LICENSE("GPL");
1/* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
268#include <linux/module.h>
269#include <linux/fs.h>
270#include <linux/buffer_head.h>
271#include <linux/major.h>
272#include <linux/types.h>
273#include <linux/errno.h>
274#include <linux/kernel.h>
275#include <linux/mm.h>
276#include <linux/slab.h>
277#include <linux/cdrom.h>
278#include <linux/sysctl.h>
279#include <linux/proc_fs.h>
280#include <linux/blkpg.h>
281#include <linux/init.h>
282#include <linux/fcntl.h>
283#include <linux/blkdev.h>
284#include <linux/times.h>
285
286#include <asm/uaccess.h>
287
288/* used to tell the module to turn on full debugging messages */
289static int debug;
290/* used to keep tray locked at all times */
291static int keeplocked;
292/* default compatibility mode */
293static int autoclose=1;
294static int autoeject;
295static int lockdoor = 1;
296/* will we ever get to use this... sigh. */
297static int check_media_type;
298/* automatically restart mrw format */
299static int mrw_format_restart = 1;
300module_param(debug, bool, 0);
301module_param(autoclose, bool, 0);
302module_param(autoeject, bool, 0);
303module_param(lockdoor, bool, 0);
304module_param(check_media_type, bool, 0);
305module_param(mrw_format_restart, bool, 0);
306
307static DEFINE_MUTEX(cdrom_mutex);
308
309static const char *mrw_format_status[] = {
310 "not mrw",
311 "bgformat inactive",
312 "bgformat active",
313 "mrw complete",
314};
315
316static const char *mrw_address_space[] = { "DMA", "GAA" };
317
318#if (ERRLOGMASK!=CD_NOTHING)
319#define cdinfo(type, fmt, args...) \
320do { \
321 if ((ERRLOGMASK & type) || debug == 1) \
322 pr_info(fmt, ##args); \
323} while (0)
324#else
325#define cdinfo(type, fmt, args...) \
326do { \
327 if (0 && (ERRLOGMASK & type) || debug == 1) \
328 pr_info(fmt, ##args); \
329} while (0)
330#endif
331
332/* These are used to simplify getting data in from and back to user land */
333#define IOCTL_IN(arg, type, in) \
334 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \
335 return -EFAULT;
336
337#define IOCTL_OUT(arg, type, out) \
338 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \
339 return -EFAULT;
340
341/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
342 a lot of places. This macro makes the code more clear. */
343#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
344
345/* used in the audio ioctls */
346#define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret
347
348/*
349 * Another popular OS uses 7 seconds as the hard timeout for default
350 * commands, so it is a good choice for us as well.
351 */
352#define CDROM_DEF_TIMEOUT (7 * HZ)
353
354/* Not-exported routines. */
355static int open_for_data(struct cdrom_device_info * cdi);
356static int check_for_audio_disc(struct cdrom_device_info * cdi,
357 struct cdrom_device_ops * cdo);
358static void sanitize_format(union cdrom_addr *addr,
359 u_char * curr, u_char requested);
360static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
361 unsigned long arg);
362
363int cdrom_get_last_written(struct cdrom_device_info *, long *);
364static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
365static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
366
367static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
368
369static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
370
371static void cdrom_sysctl_register(void);
372
373static LIST_HEAD(cdrom_list);
374
375static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
376 struct packet_command *cgc)
377{
378 if (cgc->sense) {
379 cgc->sense->sense_key = 0x05;
380 cgc->sense->asc = 0x20;
381 cgc->sense->ascq = 0x00;
382 }
383
384 cgc->stat = -EIO;
385 return -EIO;
386}
387
388/* This macro makes sure we don't have to check on cdrom_device_ops
389 * existence in the run-time routines below. Change_capability is a
390 * hack to have the capability flags defined const, while we can still
391 * change it here without gcc complaining at every line.
392 */
393#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
394
395int register_cdrom(struct cdrom_device_info *cdi)
396{
397 static char banner_printed;
398 struct cdrom_device_ops *cdo = cdi->ops;
399 int *change_capability = (int *)&cdo->capability; /* hack */
400
401 cdinfo(CD_OPEN, "entering register_cdrom\n");
402
403 if (cdo->open == NULL || cdo->release == NULL)
404 return -EINVAL;
405 if (!banner_printed) {
406 pr_info("Uniform CD-ROM driver " REVISION "\n");
407 banner_printed = 1;
408 cdrom_sysctl_register();
409 }
410
411 ENSURE(drive_status, CDC_DRIVE_STATUS );
412 if (cdo->check_events == NULL && cdo->media_changed == NULL)
413 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
414 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
415 ENSURE(lock_door, CDC_LOCK);
416 ENSURE(select_speed, CDC_SELECT_SPEED);
417 ENSURE(get_last_session, CDC_MULTI_SESSION);
418 ENSURE(get_mcn, CDC_MCN);
419 ENSURE(reset, CDC_RESET);
420 ENSURE(generic_packet, CDC_GENERIC_PACKET);
421 cdi->mc_flags = 0;
422 cdo->n_minors = 0;
423 cdi->options = CDO_USE_FFLAGS;
424
425 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
426 cdi->options |= (int) CDO_AUTO_CLOSE;
427 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
428 cdi->options |= (int) CDO_AUTO_EJECT;
429 if (lockdoor==1)
430 cdi->options |= (int) CDO_LOCK;
431 if (check_media_type==1)
432 cdi->options |= (int) CDO_CHECK_TYPE;
433
434 if (CDROM_CAN(CDC_MRW_W))
435 cdi->exit = cdrom_mrw_exit;
436
437 if (cdi->disk)
438 cdi->cdda_method = CDDA_BPC_FULL;
439 else
440 cdi->cdda_method = CDDA_OLD;
441
442 if (!cdo->generic_packet)
443 cdo->generic_packet = cdrom_dummy_generic_packet;
444
445 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
446 mutex_lock(&cdrom_mutex);
447 list_add(&cdi->list, &cdrom_list);
448 mutex_unlock(&cdrom_mutex);
449 return 0;
450}
451#undef ENSURE
452
453void unregister_cdrom(struct cdrom_device_info *cdi)
454{
455 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
456
457 mutex_lock(&cdrom_mutex);
458 list_del(&cdi->list);
459 mutex_unlock(&cdrom_mutex);
460
461 if (cdi->exit)
462 cdi->exit(cdi);
463
464 cdi->ops->n_minors--;
465 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
466}
467
468int cdrom_get_media_event(struct cdrom_device_info *cdi,
469 struct media_event_desc *med)
470{
471 struct packet_command cgc;
472 unsigned char buffer[8];
473 struct event_header *eh = (struct event_header *) buffer;
474
475 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
476 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
477 cgc.cmd[1] = 1; /* IMMED */
478 cgc.cmd[4] = 1 << 4; /* media event */
479 cgc.cmd[8] = sizeof(buffer);
480 cgc.quiet = 1;
481
482 if (cdi->ops->generic_packet(cdi, &cgc))
483 return 1;
484
485 if (be16_to_cpu(eh->data_len) < sizeof(*med))
486 return 1;
487
488 if (eh->nea || eh->notification_class != 0x4)
489 return 1;
490
491 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
492 return 0;
493}
494
495/*
496 * the first prototypes used 0x2c as the page code for the mrw mode page,
497 * subsequently this was changed to 0x03. probe the one used by this drive
498 */
499static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
500{
501 struct packet_command cgc;
502 char buffer[16];
503
504 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
505
506 cgc.timeout = HZ;
507 cgc.quiet = 1;
508
509 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
510 cdi->mrw_mode_page = MRW_MODE_PC;
511 return 0;
512 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
513 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
514 return 0;
515 }
516
517 return 1;
518}
519
520static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
521{
522 struct packet_command cgc;
523 struct mrw_feature_desc *mfd;
524 unsigned char buffer[16];
525 int ret;
526
527 *write = 0;
528
529 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
530
531 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
532 cgc.cmd[3] = CDF_MRW;
533 cgc.cmd[8] = sizeof(buffer);
534 cgc.quiet = 1;
535
536 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
537 return ret;
538
539 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
540 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
541 return 1;
542 *write = mfd->write;
543
544 if ((ret = cdrom_mrw_probe_pc(cdi))) {
545 *write = 0;
546 return ret;
547 }
548
549 return 0;
550}
551
552static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
553{
554 struct packet_command cgc;
555 unsigned char buffer[12];
556 int ret;
557
558 pr_info("%sstarting format\n", cont ? "Re" : "");
559
560 /*
561 * FmtData bit set (bit 4), format type is 1
562 */
563 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
564 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
565 cgc.cmd[1] = (1 << 4) | 1;
566
567 cgc.timeout = 5 * 60 * HZ;
568
569 /*
570 * 4 byte format list header, 8 byte format list descriptor
571 */
572 buffer[1] = 1 << 1;
573 buffer[3] = 8;
574
575 /*
576 * nr_blocks field
577 */
578 buffer[4] = 0xff;
579 buffer[5] = 0xff;
580 buffer[6] = 0xff;
581 buffer[7] = 0xff;
582
583 buffer[8] = 0x24 << 2;
584 buffer[11] = cont;
585
586 ret = cdi->ops->generic_packet(cdi, &cgc);
587 if (ret)
588 pr_info("bgformat failed\n");
589
590 return ret;
591}
592
593static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
594{
595 struct packet_command cgc;
596
597 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
598 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
599
600 /*
601 * Session = 1, Track = 0
602 */
603 cgc.cmd[1] = !!immed;
604 cgc.cmd[2] = 1 << 1;
605
606 cgc.timeout = 5 * 60 * HZ;
607
608 return cdi->ops->generic_packet(cdi, &cgc);
609}
610
611static int cdrom_flush_cache(struct cdrom_device_info *cdi)
612{
613 struct packet_command cgc;
614
615 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
616 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
617
618 cgc.timeout = 5 * 60 * HZ;
619
620 return cdi->ops->generic_packet(cdi, &cgc);
621}
622
623static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
624{
625 disc_information di;
626 int ret;
627
628 ret = cdrom_get_disc_info(cdi, &di);
629 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
630 return 1;
631
632 ret = 0;
633 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
634 pr_info("issuing MRW background format suspend\n");
635 ret = cdrom_mrw_bgformat_susp(cdi, 0);
636 }
637
638 if (!ret && cdi->media_written)
639 ret = cdrom_flush_cache(cdi);
640
641 return ret;
642}
643
644static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
645{
646 struct packet_command cgc;
647 struct mode_page_header *mph;
648 char buffer[16];
649 int ret, offset, size;
650
651 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
652
653 cgc.buffer = buffer;
654 cgc.buflen = sizeof(buffer);
655
656 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
657 return ret;
658
659 mph = (struct mode_page_header *) buffer;
660 offset = be16_to_cpu(mph->desc_length);
661 size = be16_to_cpu(mph->mode_data_length) + 2;
662
663 buffer[offset + 3] = space;
664 cgc.buflen = size;
665
666 if ((ret = cdrom_mode_select(cdi, &cgc)))
667 return ret;
668
669 pr_info("%s: mrw address space %s selected\n",
670 cdi->name, mrw_address_space[space]);
671 return 0;
672}
673
674static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
675 struct rwrt_feature_desc *rfd)
676{
677 struct packet_command cgc;
678 char buffer[24];
679 int ret;
680
681 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
682
683 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
684 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
685 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
686 cgc.quiet = 1;
687
688 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
689 return ret;
690
691 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
692 return 0;
693}
694
695static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
696{
697 struct packet_command cgc;
698 char buffer[16];
699 __be16 *feature_code;
700 int ret;
701
702 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
703
704 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
705 cgc.cmd[3] = CDF_HWDM;
706 cgc.cmd[8] = sizeof(buffer);
707 cgc.quiet = 1;
708
709 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
710 return ret;
711
712 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
713 if (be16_to_cpu(*feature_code) == CDF_HWDM)
714 return 0;
715
716 return 1;
717}
718
719
720static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
721{
722 struct rwrt_feature_desc rfd;
723 int ret;
724
725 *write = 0;
726
727 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
728 return ret;
729
730 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
731 *write = 1;
732
733 return 0;
734}
735
736static int cdrom_media_erasable(struct cdrom_device_info *cdi)
737{
738 disc_information di;
739 int ret;
740
741 ret = cdrom_get_disc_info(cdi, &di);
742 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
743 return -1;
744
745 return di.erasable;
746}
747
748/*
749 * FIXME: check RO bit
750 */
751static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
752{
753 int ret = cdrom_media_erasable(cdi);
754
755 /*
756 * allow writable open if media info read worked and media is
757 * erasable, _or_ if it fails since not all drives support it
758 */
759 if (!ret)
760 return 1;
761
762 return 0;
763}
764
765static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
766{
767 disc_information di;
768 int ret;
769
770 /*
771 * always reset to DMA lba space on open
772 */
773 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
774 pr_err("failed setting lba address space\n");
775 return 1;
776 }
777
778 ret = cdrom_get_disc_info(cdi, &di);
779 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
780 return 1;
781
782 if (!di.erasable)
783 return 1;
784
785 /*
786 * mrw_status
787 * 0 - not MRW formatted
788 * 1 - MRW bgformat started, but not running or complete
789 * 2 - MRW bgformat in progress
790 * 3 - MRW formatting complete
791 */
792 ret = 0;
793 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
794 if (!di.mrw_status)
795 ret = 1;
796 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
797 mrw_format_restart)
798 ret = cdrom_mrw_bgformat(cdi, 1);
799
800 return ret;
801}
802
803static int mo_open_write(struct cdrom_device_info *cdi)
804{
805 struct packet_command cgc;
806 char buffer[255];
807 int ret;
808
809 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
810 cgc.quiet = 1;
811
812 /*
813 * obtain write protect information as per
814 * drivers/scsi/sd.c:sd_read_write_protect_flag
815 */
816
817 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
818 if (ret)
819 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
820 if (ret) {
821 cgc.buflen = 255;
822 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
823 }
824
825 /* drive gave us no info, let the user go ahead */
826 if (ret)
827 return 0;
828
829 return buffer[3] & 0x80;
830}
831
832static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
833{
834 struct rwrt_feature_desc rfd;
835 int ret;
836
837 if ((ret = cdrom_has_defect_mgt(cdi)))
838 return ret;
839
840 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
841 return ret;
842 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
843 ret = !rfd.curr;
844
845 cdinfo(CD_OPEN, "can open for random write\n");
846 return ret;
847}
848
849static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
850{
851 struct packet_command cgc;
852 char buffer[32];
853 int ret, mmc3_profile;
854
855 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
856
857 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
858 cgc.cmd[1] = 0;
859 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
860 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
861 cgc.quiet = 1;
862
863 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
864 mmc3_profile = 0xffff;
865 else
866 mmc3_profile = (buffer[6] << 8) | buffer[7];
867
868 cdi->mmc3_profile = mmc3_profile;
869}
870
871static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
872{
873 switch (cdi->mmc3_profile) {
874 case 0x12: /* DVD-RAM */
875 case 0x1A: /* DVD+RW */
876 return 0;
877 default:
878 return 1;
879 }
880}
881
882/*
883 * returns 0 for ok to open write, non-0 to disallow
884 */
885static int cdrom_open_write(struct cdrom_device_info *cdi)
886{
887 int mrw, mrw_write, ram_write;
888 int ret = 1;
889
890 mrw = 0;
891 if (!cdrom_is_mrw(cdi, &mrw_write))
892 mrw = 1;
893
894 if (CDROM_CAN(CDC_MO_DRIVE))
895 ram_write = 1;
896 else
897 (void) cdrom_is_random_writable(cdi, &ram_write);
898
899 if (mrw)
900 cdi->mask &= ~CDC_MRW;
901 else
902 cdi->mask |= CDC_MRW;
903
904 if (mrw_write)
905 cdi->mask &= ~CDC_MRW_W;
906 else
907 cdi->mask |= CDC_MRW_W;
908
909 if (ram_write)
910 cdi->mask &= ~CDC_RAM;
911 else
912 cdi->mask |= CDC_RAM;
913
914 if (CDROM_CAN(CDC_MRW_W))
915 ret = cdrom_mrw_open_write(cdi);
916 else if (CDROM_CAN(CDC_DVD_RAM))
917 ret = cdrom_dvdram_open_write(cdi);
918 else if (CDROM_CAN(CDC_RAM) &&
919 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
920 ret = cdrom_ram_open_write(cdi);
921 else if (CDROM_CAN(CDC_MO_DRIVE))
922 ret = mo_open_write(cdi);
923 else if (!cdrom_is_dvd_rw(cdi))
924 ret = 0;
925
926 return ret;
927}
928
929static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
930{
931 struct packet_command cgc;
932
933 if (cdi->mmc3_profile != 0x1a) {
934 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
935 return;
936 }
937
938 if (!cdi->media_written) {
939 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
940 return;
941 }
942
943 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
944
945 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
946 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
947 cgc.timeout = 30*HZ;
948 cdi->ops->generic_packet(cdi, &cgc);
949
950 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
951 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
952 cgc.timeout = 3000*HZ;
953 cgc.quiet = 1;
954 cdi->ops->generic_packet(cdi, &cgc);
955
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
958 cgc.cmd[2] = 2; /* Close session */
959 cgc.quiet = 1;
960 cgc.timeout = 3000*HZ;
961 cdi->ops->generic_packet(cdi, &cgc);
962
963 cdi->media_written = 0;
964}
965
966static int cdrom_close_write(struct cdrom_device_info *cdi)
967{
968#if 0
969 return cdrom_flush_cache(cdi);
970#else
971 return 0;
972#endif
973}
974
975/* We use the open-option O_NONBLOCK to indicate that the
976 * purpose of opening is only for subsequent ioctl() calls; no device
977 * integrity checks are performed.
978 *
979 * We hope that all cd-player programs will adopt this convention. It
980 * is in their own interest: device control becomes a lot easier
981 * this way.
982 */
983int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode)
984{
985 int ret;
986
987 cdinfo(CD_OPEN, "entering cdrom_open\n");
988
989 /* open is event synchronization point, check events first */
990 check_disk_change(bdev);
991
992 /* if this was a O_NONBLOCK open and we should honor the flags,
993 * do a quick open without drive/disc integrity checks. */
994 cdi->use_count++;
995 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
996 ret = cdi->ops->open(cdi, 1);
997 } else {
998 ret = open_for_data(cdi);
999 if (ret)
1000 goto err;
1001 cdrom_mmc3_profile(cdi);
1002 if (mode & FMODE_WRITE) {
1003 ret = -EROFS;
1004 if (cdrom_open_write(cdi))
1005 goto err_release;
1006 if (!CDROM_CAN(CDC_RAM))
1007 goto err_release;
1008 ret = 0;
1009 cdi->media_written = 0;
1010 }
1011 }
1012
1013 if (ret)
1014 goto err;
1015
1016 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1017 cdi->name, cdi->use_count);
1018 return 0;
1019err_release:
1020 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1021 cdi->ops->lock_door(cdi, 0);
1022 cdinfo(CD_OPEN, "door unlocked.\n");
1023 }
1024 cdi->ops->release(cdi);
1025err:
1026 cdi->use_count--;
1027 return ret;
1028}
1029
1030static
1031int open_for_data(struct cdrom_device_info * cdi)
1032{
1033 int ret;
1034 struct cdrom_device_ops *cdo = cdi->ops;
1035 tracktype tracks;
1036 cdinfo(CD_OPEN, "entering open_for_data\n");
1037 /* Check if the driver can report drive status. If it can, we
1038 can do clever things. If it can't, well, we at least tried! */
1039 if (cdo->drive_status != NULL) {
1040 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1041 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1042 if (ret == CDS_TRAY_OPEN) {
1043 cdinfo(CD_OPEN, "the tray is open...\n");
1044 /* can/may i close it? */
1045 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1046 cdi->options & CDO_AUTO_CLOSE) {
1047 cdinfo(CD_OPEN, "trying to close the tray.\n");
1048 ret=cdo->tray_move(cdi,0);
1049 if (ret) {
1050 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1051 /* Ignore the error from the low
1052 level driver. We don't care why it
1053 couldn't close the tray. We only care
1054 that there is no disc in the drive,
1055 since that is the _REAL_ problem here.*/
1056 ret=-ENOMEDIUM;
1057 goto clean_up_and_return;
1058 }
1059 } else {
1060 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 /* Ok, the door should be closed now.. Check again */
1065 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1066 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1067 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1068 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1069 ret=-ENOMEDIUM;
1070 goto clean_up_and_return;
1071 }
1072 cdinfo(CD_OPEN, "the tray is now closed.\n");
1073 }
1074 /* the door should be closed now, check for the disc */
1075 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1076 if (ret!=CDS_DISC_OK) {
1077 ret = -ENOMEDIUM;
1078 goto clean_up_and_return;
1079 }
1080 }
1081 cdrom_count_tracks(cdi, &tracks);
1082 if (tracks.error == CDS_NO_DISC) {
1083 cdinfo(CD_OPEN, "bummer. no disc.\n");
1084 ret=-ENOMEDIUM;
1085 goto clean_up_and_return;
1086 }
1087 /* CD-Players which don't use O_NONBLOCK, workman
1088 * for example, need bit CDO_CHECK_TYPE cleared! */
1089 if (tracks.data==0) {
1090 if (cdi->options & CDO_CHECK_TYPE) {
1091 /* give people a warning shot, now that CDO_CHECK_TYPE
1092 is the default case! */
1093 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1094 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1095 (unsigned int)task_pid_nr(current));
1096 ret=-EMEDIUMTYPE;
1097 goto clean_up_and_return;
1098 }
1099 else {
1100 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1101 }
1102 }
1103
1104 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1105
1106 /* all seems well, we can open the device */
1107 ret = cdo->open(cdi, 0); /* open for data */
1108 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1109 /* After all this careful checking, we shouldn't have problems
1110 opening the device, but we don't want the device locked if
1111 this somehow fails... */
1112 if (ret) {
1113 cdinfo(CD_OPEN, "open device failed.\n");
1114 goto clean_up_and_return;
1115 }
1116 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1117 cdo->lock_door(cdi, 1);
1118 cdinfo(CD_OPEN, "door locked.\n");
1119 }
1120 cdinfo(CD_OPEN, "device opened successfully.\n");
1121 return ret;
1122
1123 /* Something failed. Try to unlock the drive, because some drivers
1124 (notably ide-cd) lock the drive after every command. This produced
1125 a nasty bug where after mount failed, the drive would remain locked!
1126 This ensures that the drive gets unlocked after a mount fails. This
1127 is a goto to avoid bloating the driver with redundant code. */
1128clean_up_and_return:
1129 cdinfo(CD_OPEN, "open failed.\n");
1130 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1131 cdo->lock_door(cdi, 0);
1132 cdinfo(CD_OPEN, "door unlocked.\n");
1133 }
1134 return ret;
1135}
1136
1137/* This code is similar to that in open_for_data. The routine is called
1138 whenever an audio play operation is requested.
1139*/
1140static int check_for_audio_disc(struct cdrom_device_info * cdi,
1141 struct cdrom_device_ops * cdo)
1142{
1143 int ret;
1144 tracktype tracks;
1145 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1146 if (!(cdi->options & CDO_CHECK_TYPE))
1147 return 0;
1148 if (cdo->drive_status != NULL) {
1149 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1150 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1151 if (ret == CDS_TRAY_OPEN) {
1152 cdinfo(CD_OPEN, "the tray is open...\n");
1153 /* can/may i close it? */
1154 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1155 cdi->options & CDO_AUTO_CLOSE) {
1156 cdinfo(CD_OPEN, "trying to close the tray.\n");
1157 ret=cdo->tray_move(cdi,0);
1158 if (ret) {
1159 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1160 /* Ignore the error from the low
1161 level driver. We don't care why it
1162 couldn't close the tray. We only care
1163 that there is no disc in the drive,
1164 since that is the _REAL_ problem here.*/
1165 return -ENOMEDIUM;
1166 }
1167 } else {
1168 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1169 return -ENOMEDIUM;
1170 }
1171 /* Ok, the door should be closed now.. Check again */
1172 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1173 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1174 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1175 return -ENOMEDIUM;
1176 }
1177 if (ret!=CDS_DISC_OK) {
1178 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1179 return -EIO;
1180 }
1181 cdinfo(CD_OPEN, "the tray is now closed.\n");
1182 }
1183 }
1184 cdrom_count_tracks(cdi, &tracks);
1185 if (tracks.error)
1186 return(tracks.error);
1187
1188 if (tracks.audio==0)
1189 return -EMEDIUMTYPE;
1190
1191 return 0;
1192}
1193
1194void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1195{
1196 struct cdrom_device_ops *cdo = cdi->ops;
1197 int opened_for_data;
1198
1199 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1200
1201 if (cdi->use_count > 0)
1202 cdi->use_count--;
1203
1204 if (cdi->use_count == 0) {
1205 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1206 cdrom_dvd_rw_close_write(cdi);
1207
1208 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1209 cdinfo(CD_CLOSE, "Unlocking door!\n");
1210 cdo->lock_door(cdi, 0);
1211 }
1212 }
1213
1214 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1215 !(mode & FMODE_NDELAY);
1216
1217 /*
1218 * flush cache on last write release
1219 */
1220 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1221 cdrom_close_write(cdi);
1222
1223 cdo->release(cdi);
1224 if (cdi->use_count == 0) { /* last process that closes dev*/
1225 if (opened_for_data &&
1226 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1227 cdo->tray_move(cdi, 1);
1228 }
1229}
1230
1231static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1232 struct cdrom_changer_info *buf)
1233{
1234 struct packet_command cgc;
1235 struct cdrom_device_ops *cdo = cdi->ops;
1236 int length;
1237
1238 /*
1239 * Sanyo changer isn't spec compliant (doesn't use regular change
1240 * LOAD_UNLOAD command, and it doesn't implement the mech status
1241 * command below
1242 */
1243 if (cdi->sanyo_slot) {
1244 buf->hdr.nslots = 3;
1245 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1246 for (length = 0; length < 3; length++) {
1247 buf->slots[length].disc_present = 1;
1248 buf->slots[length].change = 0;
1249 }
1250 return 0;
1251 }
1252
1253 length = sizeof(struct cdrom_mechstat_header) +
1254 cdi->capacity * sizeof(struct cdrom_slot);
1255
1256 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1257 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1258 cgc.cmd[8] = (length >> 8) & 0xff;
1259 cgc.cmd[9] = length & 0xff;
1260 return cdo->generic_packet(cdi, &cgc);
1261}
1262
1263static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1264{
1265 struct cdrom_changer_info *info;
1266 int ret;
1267
1268 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1269 if (cdi->sanyo_slot)
1270 return CDS_NO_INFO;
1271
1272 info = kmalloc(sizeof(*info), GFP_KERNEL);
1273 if (!info)
1274 return -ENOMEM;
1275
1276 if ((ret = cdrom_read_mech_status(cdi, info)))
1277 goto out_free;
1278
1279 if (info->slots[slot].disc_present)
1280 ret = CDS_DISC_OK;
1281 else
1282 ret = CDS_NO_DISC;
1283
1284out_free:
1285 kfree(info);
1286 return ret;
1287}
1288
1289/* Return the number of slots for an ATAPI/SCSI cdrom,
1290 * return 1 if not a changer.
1291 */
1292int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1293{
1294 int status;
1295 int nslots = 1;
1296 struct cdrom_changer_info *info;
1297
1298 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1299 /* cdrom_read_mech_status requires a valid value for capacity: */
1300 cdi->capacity = 0;
1301
1302 info = kmalloc(sizeof(*info), GFP_KERNEL);
1303 if (!info)
1304 return -ENOMEM;
1305
1306 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1307 nslots = info->hdr.nslots;
1308
1309 kfree(info);
1310 return nslots;
1311}
1312
1313
1314/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1315static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1316{
1317 struct packet_command cgc;
1318
1319 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1320 if (cdi->sanyo_slot && slot < 0)
1321 return 0;
1322
1323 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1324 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1325 cgc.cmd[4] = 2 + (slot >= 0);
1326 cgc.cmd[8] = slot;
1327 cgc.timeout = 60 * HZ;
1328
1329 /* The Sanyo 3 CD changer uses byte 7 of the
1330 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1331 using the GPCMD_LOAD_UNLOAD opcode. */
1332 if (cdi->sanyo_slot && -1 < slot) {
1333 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1334 cgc.cmd[7] = slot;
1335 cgc.cmd[4] = cgc.cmd[8] = 0;
1336 cdi->sanyo_slot = slot ? slot : 3;
1337 }
1338
1339 return cdi->ops->generic_packet(cdi, &cgc);
1340}
1341
1342static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1343{
1344 struct cdrom_changer_info *info;
1345 int curslot;
1346 int ret;
1347
1348 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1349 if (!CDROM_CAN(CDC_SELECT_DISC))
1350 return -EDRIVE_CANT_DO_THIS;
1351
1352 if (cdi->ops->check_events)
1353 cdi->ops->check_events(cdi, 0, slot);
1354 else
1355 cdi->ops->media_changed(cdi, slot);
1356
1357 if (slot == CDSL_NONE) {
1358 /* set media changed bits, on both queues */
1359 cdi->mc_flags = 0x3;
1360 return cdrom_load_unload(cdi, -1);
1361 }
1362
1363 info = kmalloc(sizeof(*info), GFP_KERNEL);
1364 if (!info)
1365 return -ENOMEM;
1366
1367 if ((ret = cdrom_read_mech_status(cdi, info))) {
1368 kfree(info);
1369 return ret;
1370 }
1371
1372 curslot = info->hdr.curslot;
1373 kfree(info);
1374
1375 if (cdi->use_count > 1 || keeplocked) {
1376 if (slot == CDSL_CURRENT) {
1377 return curslot;
1378 } else {
1379 return -EBUSY;
1380 }
1381 }
1382
1383 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1384 which is useful if it had been previously unloaded.
1385 Whether it can or not, it returns the current slot.
1386 Similarly, if slot happens to be the current one, we still
1387 try and load it. */
1388 if (slot == CDSL_CURRENT)
1389 slot = curslot;
1390
1391 /* set media changed bits on both queues */
1392 cdi->mc_flags = 0x3;
1393 if ((ret = cdrom_load_unload(cdi, slot)))
1394 return ret;
1395
1396 return slot;
1397}
1398
1399/*
1400 * As cdrom implements an extra ioctl consumer for media changed
1401 * event, it needs to buffer ->check_events() output, such that event
1402 * is not lost for both the usual VFS and ioctl paths.
1403 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1404 * path.
1405 *
1406 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1407 * called in parallel and buffering fields are accessed without any
1408 * exclusion. The original media_changed code had the same problem.
1409 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1410 * and remove this cruft altogether. It doesn't have much usefulness
1411 * at this point.
1412 */
1413static void cdrom_update_events(struct cdrom_device_info *cdi,
1414 unsigned int clearing)
1415{
1416 unsigned int events;
1417
1418 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1419 cdi->vfs_events |= events;
1420 cdi->ioctl_events |= events;
1421}
1422
1423unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1424 unsigned int clearing)
1425{
1426 unsigned int events;
1427
1428 cdrom_update_events(cdi, clearing);
1429 events = cdi->vfs_events;
1430 cdi->vfs_events = 0;
1431 return events;
1432}
1433EXPORT_SYMBOL(cdrom_check_events);
1434
1435/* We want to make media_changed accessible to the user through an
1436 * ioctl. The main problem now is that we must double-buffer the
1437 * low-level implementation, to assure that the VFS and the user both
1438 * see a medium change once.
1439 */
1440
1441static
1442int media_changed(struct cdrom_device_info *cdi, int queue)
1443{
1444 unsigned int mask = (1 << (queue & 1));
1445 int ret = !!(cdi->mc_flags & mask);
1446 bool changed;
1447
1448 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1449 return ret;
1450
1451 /* changed since last call? */
1452 if (cdi->ops->check_events) {
1453 BUG_ON(!queue); /* shouldn't be called from VFS path */
1454 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1455 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1456 cdi->ioctl_events = 0;
1457 } else
1458 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1459
1460 if (changed) {
1461 cdi->mc_flags = 0x3; /* set bit on both queues */
1462 ret |= 1;
1463 cdi->media_written = 0;
1464 }
1465
1466 cdi->mc_flags &= ~mask; /* clear bit */
1467 return ret;
1468}
1469
1470int cdrom_media_changed(struct cdrom_device_info *cdi)
1471{
1472 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1473 * Returning "0" is always safe (media hasn't been changed). Do that
1474 * if the low-level cdrom driver dosn't support media changed. */
1475 if (cdi == NULL || cdi->ops->media_changed == NULL)
1476 return 0;
1477 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1478 return 0;
1479 return media_changed(cdi, 0);
1480}
1481
1482/* badly broken, I know. Is due for a fixup anytime. */
1483static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1484{
1485 struct cdrom_tochdr header;
1486 struct cdrom_tocentry entry;
1487 int ret, i;
1488 tracks->data=0;
1489 tracks->audio=0;
1490 tracks->cdi=0;
1491 tracks->xa=0;
1492 tracks->error=0;
1493 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1494 /* Grab the TOC header so we can see how many tracks there are */
1495 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1496 if (ret == -ENOMEDIUM)
1497 tracks->error = CDS_NO_DISC;
1498 else
1499 tracks->error = CDS_NO_INFO;
1500 return;
1501 }
1502 /* check what type of tracks are on this disc */
1503 entry.cdte_format = CDROM_MSF;
1504 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1505 entry.cdte_track = i;
1506 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1507 tracks->error=CDS_NO_INFO;
1508 return;
1509 }
1510 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1511 if (entry.cdte_format == 0x10)
1512 tracks->cdi++;
1513 else if (entry.cdte_format == 0x20)
1514 tracks->xa++;
1515 else
1516 tracks->data++;
1517 } else
1518 tracks->audio++;
1519 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1520 i, entry.cdte_format, entry.cdte_ctrl);
1521 }
1522 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1523 header.cdth_trk1, tracks->audio, tracks->data,
1524 tracks->cdi, tracks->xa);
1525}
1526
1527/* Requests to the low-level drivers will /always/ be done in the
1528 following format convention:
1529
1530 CDROM_LBA: all data-related requests.
1531 CDROM_MSF: all audio-related requests.
1532
1533 However, a low-level implementation is allowed to refuse this
1534 request, and return information in its own favorite format.
1535
1536 It doesn't make sense /at all/ to ask for a play_audio in LBA
1537 format, or ask for multi-session info in MSF format. However, for
1538 backward compatibility these format requests will be satisfied, but
1539 the requests to the low-level drivers will be sanitized in the more
1540 meaningful format indicated above.
1541 */
1542
1543static
1544void sanitize_format(union cdrom_addr *addr,
1545 u_char * curr, u_char requested)
1546{
1547 if (*curr == requested)
1548 return; /* nothing to be done! */
1549 if (requested == CDROM_LBA) {
1550 addr->lba = (int) addr->msf.frame +
1551 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1552 } else { /* CDROM_MSF */
1553 int lba = addr->lba;
1554 addr->msf.frame = lba % 75;
1555 lba /= 75;
1556 lba += 2;
1557 addr->msf.second = lba % 60;
1558 addr->msf.minute = lba / 60;
1559 }
1560 *curr = requested;
1561}
1562
1563void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1564 int type)
1565{
1566 memset(cgc, 0, sizeof(struct packet_command));
1567 if (buf)
1568 memset(buf, 0, len);
1569 cgc->buffer = (char *) buf;
1570 cgc->buflen = len;
1571 cgc->data_direction = type;
1572 cgc->timeout = CDROM_DEF_TIMEOUT;
1573}
1574
1575/* DVD handling */
1576
1577#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1578#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1579
1580static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1581{
1582 cgc->cmd[0] = GPCMD_REPORT_KEY;
1583 cgc->cmd[10] = type | (agid << 6);
1584 switch (type) {
1585 case 0: case 8: case 5: {
1586 cgc->buflen = 8;
1587 break;
1588 }
1589 case 1: {
1590 cgc->buflen = 16;
1591 break;
1592 }
1593 case 2: case 4: {
1594 cgc->buflen = 12;
1595 break;
1596 }
1597 }
1598 cgc->cmd[9] = cgc->buflen;
1599 cgc->data_direction = CGC_DATA_READ;
1600}
1601
1602static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1603{
1604 cgc->cmd[0] = GPCMD_SEND_KEY;
1605 cgc->cmd[10] = type | (agid << 6);
1606 switch (type) {
1607 case 1: {
1608 cgc->buflen = 16;
1609 break;
1610 }
1611 case 3: {
1612 cgc->buflen = 12;
1613 break;
1614 }
1615 case 6: {
1616 cgc->buflen = 8;
1617 break;
1618 }
1619 }
1620 cgc->cmd[9] = cgc->buflen;
1621 cgc->data_direction = CGC_DATA_WRITE;
1622}
1623
1624static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1625{
1626 int ret;
1627 u_char buf[20];
1628 struct packet_command cgc;
1629 struct cdrom_device_ops *cdo = cdi->ops;
1630 rpc_state_t rpc_state;
1631
1632 memset(buf, 0, sizeof(buf));
1633 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1634
1635 switch (ai->type) {
1636 /* LU data send */
1637 case DVD_LU_SEND_AGID:
1638 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1639 cgc.quiet = 1;
1640 setup_report_key(&cgc, ai->lsa.agid, 0);
1641
1642 if ((ret = cdo->generic_packet(cdi, &cgc)))
1643 return ret;
1644
1645 ai->lsa.agid = buf[7] >> 6;
1646 /* Returning data, let host change state */
1647 break;
1648
1649 case DVD_LU_SEND_KEY1:
1650 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1651 setup_report_key(&cgc, ai->lsk.agid, 2);
1652
1653 if ((ret = cdo->generic_packet(cdi, &cgc)))
1654 return ret;
1655
1656 copy_key(ai->lsk.key, &buf[4]);
1657 /* Returning data, let host change state */
1658 break;
1659
1660 case DVD_LU_SEND_CHALLENGE:
1661 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1662 setup_report_key(&cgc, ai->lsc.agid, 1);
1663
1664 if ((ret = cdo->generic_packet(cdi, &cgc)))
1665 return ret;
1666
1667 copy_chal(ai->lsc.chal, &buf[4]);
1668 /* Returning data, let host change state */
1669 break;
1670
1671 /* Post-auth key */
1672 case DVD_LU_SEND_TITLE_KEY:
1673 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1674 cgc.quiet = 1;
1675 setup_report_key(&cgc, ai->lstk.agid, 4);
1676 cgc.cmd[5] = ai->lstk.lba;
1677 cgc.cmd[4] = ai->lstk.lba >> 8;
1678 cgc.cmd[3] = ai->lstk.lba >> 16;
1679 cgc.cmd[2] = ai->lstk.lba >> 24;
1680
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
1682 return ret;
1683
1684 ai->lstk.cpm = (buf[4] >> 7) & 1;
1685 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1686 ai->lstk.cgms = (buf[4] >> 4) & 3;
1687 copy_key(ai->lstk.title_key, &buf[5]);
1688 /* Returning data, let host change state */
1689 break;
1690
1691 case DVD_LU_SEND_ASF:
1692 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1693 setup_report_key(&cgc, ai->lsasf.agid, 5);
1694
1695 if ((ret = cdo->generic_packet(cdi, &cgc)))
1696 return ret;
1697
1698 ai->lsasf.asf = buf[7] & 1;
1699 break;
1700
1701 /* LU data receive (LU changes state) */
1702 case DVD_HOST_SEND_CHALLENGE:
1703 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1704 setup_send_key(&cgc, ai->hsc.agid, 1);
1705 buf[1] = 0xe;
1706 copy_chal(&buf[4], ai->hsc.chal);
1707
1708 if ((ret = cdo->generic_packet(cdi, &cgc)))
1709 return ret;
1710
1711 ai->type = DVD_LU_SEND_KEY1;
1712 break;
1713
1714 case DVD_HOST_SEND_KEY2:
1715 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1716 setup_send_key(&cgc, ai->hsk.agid, 3);
1717 buf[1] = 0xa;
1718 copy_key(&buf[4], ai->hsk.key);
1719
1720 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1721 ai->type = DVD_AUTH_FAILURE;
1722 return ret;
1723 }
1724 ai->type = DVD_AUTH_ESTABLISHED;
1725 break;
1726
1727 /* Misc */
1728 case DVD_INVALIDATE_AGID:
1729 cgc.quiet = 1;
1730 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1731 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1732 if ((ret = cdo->generic_packet(cdi, &cgc)))
1733 return ret;
1734 break;
1735
1736 /* Get region settings */
1737 case DVD_LU_SEND_RPC_STATE:
1738 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1739 setup_report_key(&cgc, 0, 8);
1740 memset(&rpc_state, 0, sizeof(rpc_state_t));
1741 cgc.buffer = (char *) &rpc_state;
1742
1743 if ((ret = cdo->generic_packet(cdi, &cgc)))
1744 return ret;
1745
1746 ai->lrpcs.type = rpc_state.type_code;
1747 ai->lrpcs.vra = rpc_state.vra;
1748 ai->lrpcs.ucca = rpc_state.ucca;
1749 ai->lrpcs.region_mask = rpc_state.region_mask;
1750 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1751 break;
1752
1753 /* Set region settings */
1754 case DVD_HOST_SEND_RPC_STATE:
1755 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1756 setup_send_key(&cgc, 0, 6);
1757 buf[1] = 6;
1758 buf[4] = ai->hrpcs.pdrc;
1759
1760 if ((ret = cdo->generic_packet(cdi, &cgc)))
1761 return ret;
1762 break;
1763
1764 default:
1765 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1766 return -ENOTTY;
1767 }
1768
1769 return 0;
1770}
1771
1772static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1773 struct packet_command *cgc)
1774{
1775 unsigned char buf[21], *base;
1776 struct dvd_layer *layer;
1777 struct cdrom_device_ops *cdo = cdi->ops;
1778 int ret, layer_num = s->physical.layer_num;
1779
1780 if (layer_num >= DVD_LAYERS)
1781 return -EINVAL;
1782
1783 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1784 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1785 cgc->cmd[6] = layer_num;
1786 cgc->cmd[7] = s->type;
1787 cgc->cmd[9] = cgc->buflen & 0xff;
1788
1789 /*
1790 * refrain from reporting errors on non-existing layers (mainly)
1791 */
1792 cgc->quiet = 1;
1793
1794 ret = cdo->generic_packet(cdi, cgc);
1795 if (ret)
1796 return ret;
1797
1798 base = &buf[4];
1799 layer = &s->physical.layer[layer_num];
1800
1801 /*
1802 * place the data... really ugly, but at least we won't have to
1803 * worry about endianess in userspace.
1804 */
1805 memset(layer, 0, sizeof(*layer));
1806 layer->book_version = base[0] & 0xf;
1807 layer->book_type = base[0] >> 4;
1808 layer->min_rate = base[1] & 0xf;
1809 layer->disc_size = base[1] >> 4;
1810 layer->layer_type = base[2] & 0xf;
1811 layer->track_path = (base[2] >> 4) & 1;
1812 layer->nlayers = (base[2] >> 5) & 3;
1813 layer->track_density = base[3] & 0xf;
1814 layer->linear_density = base[3] >> 4;
1815 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1816 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1817 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1818 layer->bca = base[16] >> 7;
1819
1820 return 0;
1821}
1822
1823static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1824 struct packet_command *cgc)
1825{
1826 int ret;
1827 u_char buf[8];
1828 struct cdrom_device_ops *cdo = cdi->ops;
1829
1830 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1831 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1832 cgc->cmd[6] = s->copyright.layer_num;
1833 cgc->cmd[7] = s->type;
1834 cgc->cmd[8] = cgc->buflen >> 8;
1835 cgc->cmd[9] = cgc->buflen & 0xff;
1836
1837 ret = cdo->generic_packet(cdi, cgc);
1838 if (ret)
1839 return ret;
1840
1841 s->copyright.cpst = buf[4];
1842 s->copyright.rmi = buf[5];
1843
1844 return 0;
1845}
1846
1847static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1848 struct packet_command *cgc)
1849{
1850 int ret, size;
1851 u_char *buf;
1852 struct cdrom_device_ops *cdo = cdi->ops;
1853
1854 size = sizeof(s->disckey.value) + 4;
1855
1856 buf = kmalloc(size, GFP_KERNEL);
1857 if (!buf)
1858 return -ENOMEM;
1859
1860 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1861 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1862 cgc->cmd[7] = s->type;
1863 cgc->cmd[8] = size >> 8;
1864 cgc->cmd[9] = size & 0xff;
1865 cgc->cmd[10] = s->disckey.agid << 6;
1866
1867 ret = cdo->generic_packet(cdi, cgc);
1868 if (!ret)
1869 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1870
1871 kfree(buf);
1872 return ret;
1873}
1874
1875static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1876 struct packet_command *cgc)
1877{
1878 int ret, size = 4 + 188;
1879 u_char *buf;
1880 struct cdrom_device_ops *cdo = cdi->ops;
1881
1882 buf = kmalloc(size, GFP_KERNEL);
1883 if (!buf)
1884 return -ENOMEM;
1885
1886 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1887 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1888 cgc->cmd[7] = s->type;
1889 cgc->cmd[9] = cgc->buflen & 0xff;
1890
1891 ret = cdo->generic_packet(cdi, cgc);
1892 if (ret)
1893 goto out;
1894
1895 s->bca.len = buf[0] << 8 | buf[1];
1896 if (s->bca.len < 12 || s->bca.len > 188) {
1897 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1898 ret = -EIO;
1899 goto out;
1900 }
1901 memcpy(s->bca.value, &buf[4], s->bca.len);
1902 ret = 0;
1903out:
1904 kfree(buf);
1905 return ret;
1906}
1907
1908static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1909 struct packet_command *cgc)
1910{
1911 int ret = 0, size;
1912 u_char *buf;
1913 struct cdrom_device_ops *cdo = cdi->ops;
1914
1915 size = sizeof(s->manufact.value) + 4;
1916
1917 buf = kmalloc(size, GFP_KERNEL);
1918 if (!buf)
1919 return -ENOMEM;
1920
1921 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1922 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1923 cgc->cmd[7] = s->type;
1924 cgc->cmd[8] = size >> 8;
1925 cgc->cmd[9] = size & 0xff;
1926
1927 ret = cdo->generic_packet(cdi, cgc);
1928 if (ret)
1929 goto out;
1930
1931 s->manufact.len = buf[0] << 8 | buf[1];
1932 if (s->manufact.len < 0) {
1933 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1934 " (%d)\n", s->manufact.len);
1935 ret = -EIO;
1936 } else {
1937 if (s->manufact.len > 2048) {
1938 cdinfo(CD_WARNING, "Received invalid manufacture info "
1939 "length (%d): truncating to 2048\n",
1940 s->manufact.len);
1941 s->manufact.len = 2048;
1942 }
1943 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1944 }
1945
1946out:
1947 kfree(buf);
1948 return ret;
1949}
1950
1951static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1952 struct packet_command *cgc)
1953{
1954 switch (s->type) {
1955 case DVD_STRUCT_PHYSICAL:
1956 return dvd_read_physical(cdi, s, cgc);
1957
1958 case DVD_STRUCT_COPYRIGHT:
1959 return dvd_read_copyright(cdi, s, cgc);
1960
1961 case DVD_STRUCT_DISCKEY:
1962 return dvd_read_disckey(cdi, s, cgc);
1963
1964 case DVD_STRUCT_BCA:
1965 return dvd_read_bca(cdi, s, cgc);
1966
1967 case DVD_STRUCT_MANUFACT:
1968 return dvd_read_manufact(cdi, s, cgc);
1969
1970 default:
1971 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1972 s->type);
1973 return -EINVAL;
1974 }
1975}
1976
1977int cdrom_mode_sense(struct cdrom_device_info *cdi,
1978 struct packet_command *cgc,
1979 int page_code, int page_control)
1980{
1981 struct cdrom_device_ops *cdo = cdi->ops;
1982
1983 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1984
1985 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1986 cgc->cmd[2] = page_code | (page_control << 6);
1987 cgc->cmd[7] = cgc->buflen >> 8;
1988 cgc->cmd[8] = cgc->buflen & 0xff;
1989 cgc->data_direction = CGC_DATA_READ;
1990 return cdo->generic_packet(cdi, cgc);
1991}
1992
1993int cdrom_mode_select(struct cdrom_device_info *cdi,
1994 struct packet_command *cgc)
1995{
1996 struct cdrom_device_ops *cdo = cdi->ops;
1997
1998 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1999 memset(cgc->buffer, 0, 2);
2000 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2001 cgc->cmd[1] = 0x10; /* PF */
2002 cgc->cmd[7] = cgc->buflen >> 8;
2003 cgc->cmd[8] = cgc->buflen & 0xff;
2004 cgc->data_direction = CGC_DATA_WRITE;
2005 return cdo->generic_packet(cdi, cgc);
2006}
2007
2008static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2009 struct cdrom_subchnl *subchnl, int mcn)
2010{
2011 struct cdrom_device_ops *cdo = cdi->ops;
2012 struct packet_command cgc;
2013 char buffer[32];
2014 int ret;
2015
2016 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2017 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2018 cgc.cmd[1] = 2; /* MSF addressing */
2019 cgc.cmd[2] = 0x40; /* request subQ data */
2020 cgc.cmd[3] = mcn ? 2 : 1;
2021 cgc.cmd[8] = 16;
2022
2023 if ((ret = cdo->generic_packet(cdi, &cgc)))
2024 return ret;
2025
2026 subchnl->cdsc_audiostatus = cgc.buffer[1];
2027 subchnl->cdsc_format = CDROM_MSF;
2028 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2029 subchnl->cdsc_trk = cgc.buffer[6];
2030 subchnl->cdsc_ind = cgc.buffer[7];
2031
2032 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2033 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2034 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2035 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2036 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2037 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2038
2039 return 0;
2040}
2041
2042/*
2043 * Specific READ_10 interface
2044 */
2045static int cdrom_read_cd(struct cdrom_device_info *cdi,
2046 struct packet_command *cgc, int lba,
2047 int blocksize, int nblocks)
2048{
2049 struct cdrom_device_ops *cdo = cdi->ops;
2050
2051 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2052 cgc->cmd[0] = GPCMD_READ_10;
2053 cgc->cmd[2] = (lba >> 24) & 0xff;
2054 cgc->cmd[3] = (lba >> 16) & 0xff;
2055 cgc->cmd[4] = (lba >> 8) & 0xff;
2056 cgc->cmd[5] = lba & 0xff;
2057 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2058 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2059 cgc->cmd[8] = nblocks & 0xff;
2060 cgc->buflen = blocksize * nblocks;
2061 return cdo->generic_packet(cdi, cgc);
2062}
2063
2064/* very generic interface for reading the various types of blocks */
2065static int cdrom_read_block(struct cdrom_device_info *cdi,
2066 struct packet_command *cgc,
2067 int lba, int nblocks, int format, int blksize)
2068{
2069 struct cdrom_device_ops *cdo = cdi->ops;
2070
2071 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2072 cgc->cmd[0] = GPCMD_READ_CD;
2073 /* expected sector size - cdda,mode1,etc. */
2074 cgc->cmd[1] = format << 2;
2075 /* starting address */
2076 cgc->cmd[2] = (lba >> 24) & 0xff;
2077 cgc->cmd[3] = (lba >> 16) & 0xff;
2078 cgc->cmd[4] = (lba >> 8) & 0xff;
2079 cgc->cmd[5] = lba & 0xff;
2080 /* number of blocks */
2081 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2082 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2083 cgc->cmd[8] = nblocks & 0xff;
2084 cgc->buflen = blksize * nblocks;
2085
2086 /* set the header info returned */
2087 switch (blksize) {
2088 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2089 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2090 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2091 default : cgc->cmd[9] = 0x10;
2092 }
2093
2094 return cdo->generic_packet(cdi, cgc);
2095}
2096
2097static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2098 int lba, int nframes)
2099{
2100 struct packet_command cgc;
2101 int ret = 0;
2102 int nr;
2103
2104 cdi->last_sense = 0;
2105
2106 memset(&cgc, 0, sizeof(cgc));
2107
2108 /*
2109 * start with will ra.nframes size, back down if alloc fails
2110 */
2111 nr = nframes;
2112 do {
2113 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2114 if (cgc.buffer)
2115 break;
2116
2117 nr >>= 1;
2118 } while (nr);
2119
2120 if (!nr)
2121 return -ENOMEM;
2122
2123 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2124 ret = -EFAULT;
2125 goto out;
2126 }
2127
2128 cgc.data_direction = CGC_DATA_READ;
2129 while (nframes > 0) {
2130 if (nr > nframes)
2131 nr = nframes;
2132
2133 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2134 if (ret)
2135 break;
2136 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2137 ret = -EFAULT;
2138 break;
2139 }
2140 ubuf += CD_FRAMESIZE_RAW * nr;
2141 nframes -= nr;
2142 lba += nr;
2143 }
2144out:
2145 kfree(cgc.buffer);
2146 return ret;
2147}
2148
2149static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2150 int lba, int nframes)
2151{
2152 struct request_queue *q = cdi->disk->queue;
2153 struct request *rq;
2154 struct bio *bio;
2155 unsigned int len;
2156 int nr, ret = 0;
2157
2158 if (!q)
2159 return -ENXIO;
2160
2161 cdi->last_sense = 0;
2162
2163 while (nframes) {
2164 nr = nframes;
2165 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2166 nr = 1;
2167 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2168 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2169
2170 len = nr * CD_FRAMESIZE_RAW;
2171
2172 rq = blk_get_request(q, READ, GFP_KERNEL);
2173 if (!rq) {
2174 ret = -ENOMEM;
2175 break;
2176 }
2177
2178 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2179 if (ret) {
2180 blk_put_request(rq);
2181 break;
2182 }
2183
2184 rq->cmd[0] = GPCMD_READ_CD;
2185 rq->cmd[1] = 1 << 2;
2186 rq->cmd[2] = (lba >> 24) & 0xff;
2187 rq->cmd[3] = (lba >> 16) & 0xff;
2188 rq->cmd[4] = (lba >> 8) & 0xff;
2189 rq->cmd[5] = lba & 0xff;
2190 rq->cmd[6] = (nr >> 16) & 0xff;
2191 rq->cmd[7] = (nr >> 8) & 0xff;
2192 rq->cmd[8] = nr & 0xff;
2193 rq->cmd[9] = 0xf8;
2194
2195 rq->cmd_len = 12;
2196 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2197 rq->timeout = 60 * HZ;
2198 bio = rq->bio;
2199
2200 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2201 struct request_sense *s = rq->sense;
2202 ret = -EIO;
2203 cdi->last_sense = s->sense_key;
2204 }
2205
2206 if (blk_rq_unmap_user(bio))
2207 ret = -EFAULT;
2208 blk_put_request(rq);
2209
2210 if (ret)
2211 break;
2212
2213 nframes -= nr;
2214 lba += nr;
2215 ubuf += len;
2216 }
2217
2218 return ret;
2219}
2220
2221static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2222 int lba, int nframes)
2223{
2224 int ret;
2225
2226 if (cdi->cdda_method == CDDA_OLD)
2227 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2228
2229retry:
2230 /*
2231 * for anything else than success and io error, we need to retry
2232 */
2233 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2234 if (!ret || ret != -EIO)
2235 return ret;
2236
2237 /*
2238 * I've seen drives get sense 4/8/3 udma crc errors on multi
2239 * frame dma, so drop to single frame dma if we need to
2240 */
2241 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2242 pr_info("dropping to single frame dma\n");
2243 cdi->cdda_method = CDDA_BPC_SINGLE;
2244 goto retry;
2245 }
2246
2247 /*
2248 * so we have an io error of some sort with multi frame dma. if the
2249 * condition wasn't a hardware error
2250 * problems, not for any error
2251 */
2252 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2253 return ret;
2254
2255 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2256 cdi->cdda_method = CDDA_OLD;
2257 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2258}
2259
2260static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2261 void __user *argp)
2262{
2263 struct cdrom_multisession ms_info;
2264 u8 requested_format;
2265 int ret;
2266
2267 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2268
2269 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2270 return -ENOSYS;
2271
2272 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2273 return -EFAULT;
2274
2275 requested_format = ms_info.addr_format;
2276 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2277 return -EINVAL;
2278 ms_info.addr_format = CDROM_LBA;
2279
2280 ret = cdi->ops->get_last_session(cdi, &ms_info);
2281 if (ret)
2282 return ret;
2283
2284 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2285
2286 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2287 return -EFAULT;
2288
2289 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2290 return 0;
2291}
2292
2293static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2294{
2295 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2296
2297 if (!CDROM_CAN(CDC_OPEN_TRAY))
2298 return -ENOSYS;
2299 if (cdi->use_count != 1 || keeplocked)
2300 return -EBUSY;
2301 if (CDROM_CAN(CDC_LOCK)) {
2302 int ret = cdi->ops->lock_door(cdi, 0);
2303 if (ret)
2304 return ret;
2305 }
2306
2307 return cdi->ops->tray_move(cdi, 1);
2308}
2309
2310static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2311{
2312 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2313
2314 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2315 return -ENOSYS;
2316 return cdi->ops->tray_move(cdi, 0);
2317}
2318
2319static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2320 unsigned long arg)
2321{
2322 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2323
2324 if (!CDROM_CAN(CDC_OPEN_TRAY))
2325 return -ENOSYS;
2326 if (keeplocked)
2327 return -EBUSY;
2328
2329 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2330 if (arg)
2331 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2332 return 0;
2333}
2334
2335static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2336 unsigned long arg)
2337{
2338 struct cdrom_changer_info *info;
2339 int ret;
2340
2341 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2342
2343 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2344 return -ENOSYS;
2345
2346 /* cannot select disc or select current disc */
2347 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2348 return media_changed(cdi, 1);
2349
2350 if ((unsigned int)arg >= cdi->capacity)
2351 return -EINVAL;
2352
2353 info = kmalloc(sizeof(*info), GFP_KERNEL);
2354 if (!info)
2355 return -ENOMEM;
2356
2357 ret = cdrom_read_mech_status(cdi, info);
2358 if (!ret)
2359 ret = info->slots[arg].change;
2360 kfree(info);
2361 return ret;
2362}
2363
2364static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2365 unsigned long arg)
2366{
2367 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2368
2369 /*
2370 * Options need to be in sync with capability.
2371 * Too late for that, so we have to check each one separately.
2372 */
2373 switch (arg) {
2374 case CDO_USE_FFLAGS:
2375 case CDO_CHECK_TYPE:
2376 break;
2377 case CDO_LOCK:
2378 if (!CDROM_CAN(CDC_LOCK))
2379 return -ENOSYS;
2380 break;
2381 case 0:
2382 return cdi->options;
2383 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2384 default:
2385 if (!CDROM_CAN(arg))
2386 return -ENOSYS;
2387 }
2388 cdi->options |= (int) arg;
2389 return cdi->options;
2390}
2391
2392static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2393 unsigned long arg)
2394{
2395 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2396
2397 cdi->options &= ~(int) arg;
2398 return cdi->options;
2399}
2400
2401static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2402 unsigned long arg)
2403{
2404 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2405
2406 if (!CDROM_CAN(CDC_SELECT_SPEED))
2407 return -ENOSYS;
2408 return cdi->ops->select_speed(cdi, arg);
2409}
2410
2411static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2412 unsigned long arg)
2413{
2414 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2415
2416 if (!CDROM_CAN(CDC_SELECT_DISC))
2417 return -ENOSYS;
2418
2419 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2420 if ((int)arg >= cdi->capacity)
2421 return -EINVAL;
2422 }
2423
2424 /*
2425 * ->select_disc is a hook to allow a driver-specific way of
2426 * seleting disc. However, since there is no equivalent hook for
2427 * cdrom_slot_status this may not actually be useful...
2428 */
2429 if (cdi->ops->select_disc)
2430 return cdi->ops->select_disc(cdi, arg);
2431
2432 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2433 return cdrom_select_disc(cdi, arg);
2434}
2435
2436static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2437 struct block_device *bdev)
2438{
2439 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2440
2441 if (!capable(CAP_SYS_ADMIN))
2442 return -EACCES;
2443 if (!CDROM_CAN(CDC_RESET))
2444 return -ENOSYS;
2445 invalidate_bdev(bdev);
2446 return cdi->ops->reset(cdi);
2447}
2448
2449static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2450 unsigned long arg)
2451{
2452 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2453
2454 if (!CDROM_CAN(CDC_LOCK))
2455 return -EDRIVE_CANT_DO_THIS;
2456
2457 keeplocked = arg ? 1 : 0;
2458
2459 /*
2460 * Don't unlock the door on multiple opens by default, but allow
2461 * root to do so.
2462 */
2463 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2464 return -EBUSY;
2465 return cdi->ops->lock_door(cdi, arg);
2466}
2467
2468static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2469 unsigned long arg)
2470{
2471 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2472
2473 if (!capable(CAP_SYS_ADMIN))
2474 return -EACCES;
2475 debug = arg ? 1 : 0;
2476 return debug;
2477}
2478
2479static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2480{
2481 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2482 return (cdi->ops->capability & ~cdi->mask);
2483}
2484
2485/*
2486 * The following function is implemented, although very few audio
2487 * discs give Universal Product Code information, which should just be
2488 * the Medium Catalog Number on the box. Note, that the way the code
2489 * is written on the CD is /not/ uniform across all discs!
2490 */
2491static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2492 void __user *argp)
2493{
2494 struct cdrom_mcn mcn;
2495 int ret;
2496
2497 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2498
2499 if (!(cdi->ops->capability & CDC_MCN))
2500 return -ENOSYS;
2501 ret = cdi->ops->get_mcn(cdi, &mcn);
2502 if (ret)
2503 return ret;
2504
2505 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2506 return -EFAULT;
2507 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2508 return 0;
2509}
2510
2511static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2512 unsigned long arg)
2513{
2514 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2515
2516 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2517 return -ENOSYS;
2518 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2519 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2520 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2521 if (((int)arg >= cdi->capacity))
2522 return -EINVAL;
2523 return cdrom_slot_status(cdi, arg);
2524}
2525
2526/*
2527 * Ok, this is where problems start. The current interface for the
2528 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2529 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2530 * is often the case, it is also very common for CDs to have some tracks
2531 * with data, and some tracks with audio. Just because I feel like it,
2532 * I declare the following to be the best way to cope. If the CD has ANY
2533 * data tracks on it, it will be returned as a data CD. If it has any XA
2534 * tracks, I will return it as that. Now I could simplify this interface
2535 * by combining these returns with the above, but this more clearly
2536 * demonstrates the problem with the current interface. Too bad this
2537 * wasn't designed to use bitmasks... -Erik
2538 *
2539 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2540 * User level programmers might feel the ioctl is not very useful.
2541 * ---david
2542 */
2543static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2544{
2545 tracktype tracks;
2546
2547 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2548
2549 cdrom_count_tracks(cdi, &tracks);
2550 if (tracks.error)
2551 return tracks.error;
2552
2553 /* Policy mode on */
2554 if (tracks.audio > 0) {
2555 if (!tracks.data && !tracks.cdi && !tracks.xa)
2556 return CDS_AUDIO;
2557 else
2558 return CDS_MIXED;
2559 }
2560
2561 if (tracks.cdi > 0)
2562 return CDS_XA_2_2;
2563 if (tracks.xa > 0)
2564 return CDS_XA_2_1;
2565 if (tracks.data > 0)
2566 return CDS_DATA_1;
2567 /* Policy mode off */
2568
2569 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2570 return CDS_NO_INFO;
2571}
2572
2573static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2574{
2575 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2576 return cdi->capacity;
2577}
2578
2579static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2580 void __user *argp)
2581{
2582 struct cdrom_subchnl q;
2583 u8 requested, back;
2584 int ret;
2585
2586 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2587
2588 if (copy_from_user(&q, argp, sizeof(q)))
2589 return -EFAULT;
2590
2591 requested = q.cdsc_format;
2592 if (requested != CDROM_MSF && requested != CDROM_LBA)
2593 return -EINVAL;
2594 q.cdsc_format = CDROM_MSF;
2595
2596 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2597 if (ret)
2598 return ret;
2599
2600 back = q.cdsc_format; /* local copy */
2601 sanitize_format(&q.cdsc_absaddr, &back, requested);
2602 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2603
2604 if (copy_to_user(argp, &q, sizeof(q)))
2605 return -EFAULT;
2606 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2607 return 0;
2608}
2609
2610static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2611 void __user *argp)
2612{
2613 struct cdrom_tochdr header;
2614 int ret;
2615
2616 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2617
2618 if (copy_from_user(&header, argp, sizeof(header)))
2619 return -EFAULT;
2620
2621 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2622 if (ret)
2623 return ret;
2624
2625 if (copy_to_user(argp, &header, sizeof(header)))
2626 return -EFAULT;
2627 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2628 return 0;
2629}
2630
2631static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2632 void __user *argp)
2633{
2634 struct cdrom_tocentry entry;
2635 u8 requested_format;
2636 int ret;
2637
2638 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2639
2640 if (copy_from_user(&entry, argp, sizeof(entry)))
2641 return -EFAULT;
2642
2643 requested_format = entry.cdte_format;
2644 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2645 return -EINVAL;
2646 /* make interface to low-level uniform */
2647 entry.cdte_format = CDROM_MSF;
2648 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2649 if (ret)
2650 return ret;
2651 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2652
2653 if (copy_to_user(argp, &entry, sizeof(entry)))
2654 return -EFAULT;
2655 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2656 return 0;
2657}
2658
2659static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2660 void __user *argp)
2661{
2662 struct cdrom_msf msf;
2663
2664 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2665
2666 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2667 return -ENOSYS;
2668 if (copy_from_user(&msf, argp, sizeof(msf)))
2669 return -EFAULT;
2670 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2671}
2672
2673static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2674 void __user *argp)
2675{
2676 struct cdrom_ti ti;
2677 int ret;
2678
2679 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2680
2681 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2682 return -ENOSYS;
2683 if (copy_from_user(&ti, argp, sizeof(ti)))
2684 return -EFAULT;
2685
2686 ret = check_for_audio_disc(cdi, cdi->ops);
2687 if (ret)
2688 return ret;
2689 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2690}
2691static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2692 void __user *argp)
2693{
2694 struct cdrom_volctrl volume;
2695
2696 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2697
2698 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2699 return -ENOSYS;
2700 if (copy_from_user(&volume, argp, sizeof(volume)))
2701 return -EFAULT;
2702 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2703}
2704
2705static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2706 void __user *argp)
2707{
2708 struct cdrom_volctrl volume;
2709 int ret;
2710
2711 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2712
2713 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2714 return -ENOSYS;
2715
2716 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2717 if (ret)
2718 return ret;
2719
2720 if (copy_to_user(argp, &volume, sizeof(volume)))
2721 return -EFAULT;
2722 return 0;
2723}
2724
2725static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2726 unsigned int cmd)
2727{
2728 int ret;
2729
2730 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2731
2732 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2733 return -ENOSYS;
2734 ret = check_for_audio_disc(cdi, cdi->ops);
2735 if (ret)
2736 return ret;
2737 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2738}
2739
2740/*
2741 * Just about every imaginable ioctl is supported in the Uniform layer
2742 * these days.
2743 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2744 */
2745int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2746 fmode_t mode, unsigned int cmd, unsigned long arg)
2747{
2748 void __user *argp = (void __user *)arg;
2749 int ret;
2750 struct gendisk *disk = bdev->bd_disk;
2751
2752 /*
2753 * Try the generic SCSI command ioctl's first.
2754 */
2755 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
2756 if (ret != -ENOTTY)
2757 return ret;
2758
2759 switch (cmd) {
2760 case CDROMMULTISESSION:
2761 return cdrom_ioctl_multisession(cdi, argp);
2762 case CDROMEJECT:
2763 return cdrom_ioctl_eject(cdi);
2764 case CDROMCLOSETRAY:
2765 return cdrom_ioctl_closetray(cdi);
2766 case CDROMEJECT_SW:
2767 return cdrom_ioctl_eject_sw(cdi, arg);
2768 case CDROM_MEDIA_CHANGED:
2769 return cdrom_ioctl_media_changed(cdi, arg);
2770 case CDROM_SET_OPTIONS:
2771 return cdrom_ioctl_set_options(cdi, arg);
2772 case CDROM_CLEAR_OPTIONS:
2773 return cdrom_ioctl_clear_options(cdi, arg);
2774 case CDROM_SELECT_SPEED:
2775 return cdrom_ioctl_select_speed(cdi, arg);
2776 case CDROM_SELECT_DISC:
2777 return cdrom_ioctl_select_disc(cdi, arg);
2778 case CDROMRESET:
2779 return cdrom_ioctl_reset(cdi, bdev);
2780 case CDROM_LOCKDOOR:
2781 return cdrom_ioctl_lock_door(cdi, arg);
2782 case CDROM_DEBUG:
2783 return cdrom_ioctl_debug(cdi, arg);
2784 case CDROM_GET_CAPABILITY:
2785 return cdrom_ioctl_get_capability(cdi);
2786 case CDROM_GET_MCN:
2787 return cdrom_ioctl_get_mcn(cdi, argp);
2788 case CDROM_DRIVE_STATUS:
2789 return cdrom_ioctl_drive_status(cdi, arg);
2790 case CDROM_DISC_STATUS:
2791 return cdrom_ioctl_disc_status(cdi);
2792 case CDROM_CHANGER_NSLOTS:
2793 return cdrom_ioctl_changer_nslots(cdi);
2794 }
2795
2796 /*
2797 * Use the ioctls that are implemented through the generic_packet()
2798 * interface. this may look at bit funny, but if -ENOTTY is
2799 * returned that particular ioctl is not implemented and we
2800 * let it go through the device specific ones.
2801 */
2802 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2803 ret = mmc_ioctl(cdi, cmd, arg);
2804 if (ret != -ENOTTY)
2805 return ret;
2806 }
2807
2808 /*
2809 * Note: most of the cdinfo() calls are commented out here,
2810 * because they fill up the sys log when CD players poll
2811 * the drive.
2812 */
2813 switch (cmd) {
2814 case CDROMSUBCHNL:
2815 return cdrom_ioctl_get_subchnl(cdi, argp);
2816 case CDROMREADTOCHDR:
2817 return cdrom_ioctl_read_tochdr(cdi, argp);
2818 case CDROMREADTOCENTRY:
2819 return cdrom_ioctl_read_tocentry(cdi, argp);
2820 case CDROMPLAYMSF:
2821 return cdrom_ioctl_play_msf(cdi, argp);
2822 case CDROMPLAYTRKIND:
2823 return cdrom_ioctl_play_trkind(cdi, argp);
2824 case CDROMVOLCTRL:
2825 return cdrom_ioctl_volctrl(cdi, argp);
2826 case CDROMVOLREAD:
2827 return cdrom_ioctl_volread(cdi, argp);
2828 case CDROMSTART:
2829 case CDROMSTOP:
2830 case CDROMPAUSE:
2831 case CDROMRESUME:
2832 return cdrom_ioctl_audioctl(cdi, cmd);
2833 }
2834
2835 return -ENOSYS;
2836}
2837
2838/*
2839 * Required when we need to use READ_10 to issue other than 2048 block
2840 * reads
2841 */
2842static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2843{
2844 struct cdrom_device_ops *cdo = cdi->ops;
2845 struct packet_command cgc;
2846 struct modesel_head mh;
2847
2848 memset(&mh, 0, sizeof(mh));
2849 mh.block_desc_length = 0x08;
2850 mh.block_length_med = (size >> 8) & 0xff;
2851 mh.block_length_lo = size & 0xff;
2852
2853 memset(&cgc, 0, sizeof(cgc));
2854 cgc.cmd[0] = 0x15;
2855 cgc.cmd[1] = 1 << 4;
2856 cgc.cmd[4] = 12;
2857 cgc.buflen = sizeof(mh);
2858 cgc.buffer = (char *) &mh;
2859 cgc.data_direction = CGC_DATA_WRITE;
2860 mh.block_desc_length = 0x08;
2861 mh.block_length_med = (size >> 8) & 0xff;
2862 mh.block_length_lo = size & 0xff;
2863
2864 return cdo->generic_packet(cdi, &cgc);
2865}
2866
2867static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2868 void __user *arg,
2869 struct packet_command *cgc,
2870 int cmd)
2871{
2872 struct request_sense sense;
2873 struct cdrom_msf msf;
2874 int blocksize = 0, format = 0, lba;
2875 int ret;
2876
2877 switch (cmd) {
2878 case CDROMREADRAW:
2879 blocksize = CD_FRAMESIZE_RAW;
2880 break;
2881 case CDROMREADMODE1:
2882 blocksize = CD_FRAMESIZE;
2883 format = 2;
2884 break;
2885 case CDROMREADMODE2:
2886 blocksize = CD_FRAMESIZE_RAW0;
2887 break;
2888 }
2889 IOCTL_IN(arg, struct cdrom_msf, msf);
2890 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2891 /* FIXME: we need upper bound checking, too!! */
2892 if (lba < 0)
2893 return -EINVAL;
2894
2895 cgc->buffer = kmalloc(blocksize, GFP_KERNEL);
2896 if (cgc->buffer == NULL)
2897 return -ENOMEM;
2898
2899 memset(&sense, 0, sizeof(sense));
2900 cgc->sense = &sense;
2901 cgc->data_direction = CGC_DATA_READ;
2902 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2903 if (ret && sense.sense_key == 0x05 &&
2904 sense.asc == 0x20 &&
2905 sense.ascq == 0x00) {
2906 /*
2907 * SCSI-II devices are not required to support
2908 * READ_CD, so let's try switching block size
2909 */
2910 /* FIXME: switch back again... */
2911 ret = cdrom_switch_blocksize(cdi, blocksize);
2912 if (ret)
2913 goto out;
2914 cgc->sense = NULL;
2915 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2916 ret |= cdrom_switch_blocksize(cdi, blocksize);
2917 }
2918 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2919 ret = -EFAULT;
2920out:
2921 kfree(cgc->buffer);
2922 return ret;
2923}
2924
2925static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2926 void __user *arg)
2927{
2928 struct cdrom_read_audio ra;
2929 int lba;
2930
2931 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2932
2933 if (ra.addr_format == CDROM_MSF)
2934 lba = msf_to_lba(ra.addr.msf.minute,
2935 ra.addr.msf.second,
2936 ra.addr.msf.frame);
2937 else if (ra.addr_format == CDROM_LBA)
2938 lba = ra.addr.lba;
2939 else
2940 return -EINVAL;
2941
2942 /* FIXME: we need upper bound checking, too!! */
2943 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2944 return -EINVAL;
2945
2946 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2947}
2948
2949static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2950 void __user *arg)
2951{
2952 int ret;
2953 struct cdrom_subchnl q;
2954 u_char requested, back;
2955 IOCTL_IN(arg, struct cdrom_subchnl, q);
2956 requested = q.cdsc_format;
2957 if (!((requested == CDROM_MSF) ||
2958 (requested == CDROM_LBA)))
2959 return -EINVAL;
2960 q.cdsc_format = CDROM_MSF;
2961 ret = cdrom_read_subchannel(cdi, &q, 0);
2962 if (ret)
2963 return ret;
2964 back = q.cdsc_format; /* local copy */
2965 sanitize_format(&q.cdsc_absaddr, &back, requested);
2966 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2967 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2968 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2969 return 0;
2970}
2971
2972static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2973 void __user *arg,
2974 struct packet_command *cgc)
2975{
2976 struct cdrom_device_ops *cdo = cdi->ops;
2977 struct cdrom_msf msf;
2978 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2979 IOCTL_IN(arg, struct cdrom_msf, msf);
2980 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2981 cgc->cmd[3] = msf.cdmsf_min0;
2982 cgc->cmd[4] = msf.cdmsf_sec0;
2983 cgc->cmd[5] = msf.cdmsf_frame0;
2984 cgc->cmd[6] = msf.cdmsf_min1;
2985 cgc->cmd[7] = msf.cdmsf_sec1;
2986 cgc->cmd[8] = msf.cdmsf_frame1;
2987 cgc->data_direction = CGC_DATA_NONE;
2988 return cdo->generic_packet(cdi, cgc);
2989}
2990
2991static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2992 void __user *arg,
2993 struct packet_command *cgc)
2994{
2995 struct cdrom_device_ops *cdo = cdi->ops;
2996 struct cdrom_blk blk;
2997 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2998 IOCTL_IN(arg, struct cdrom_blk, blk);
2999 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3000 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3001 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3002 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3003 cgc->cmd[5] = blk.from & 0xff;
3004 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3005 cgc->cmd[8] = blk.len & 0xff;
3006 cgc->data_direction = CGC_DATA_NONE;
3007 return cdo->generic_packet(cdi, cgc);
3008}
3009
3010static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3011 void __user *arg,
3012 struct packet_command *cgc,
3013 unsigned int cmd)
3014{
3015 struct cdrom_volctrl volctrl;
3016 unsigned char buffer[32];
3017 char mask[sizeof(buffer)];
3018 unsigned short offset;
3019 int ret;
3020
3021 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3022
3023 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
3024
3025 cgc->buffer = buffer;
3026 cgc->buflen = 24;
3027 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3028 if (ret)
3029 return ret;
3030
3031 /* originally the code depended on buffer[1] to determine
3032 how much data is available for transfer. buffer[1] is
3033 unfortunately ambigious and the only reliable way seem
3034 to be to simply skip over the block descriptor... */
3035 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3036
3037 if (offset + 16 > sizeof(buffer))
3038 return -E2BIG;
3039
3040 if (offset + 16 > cgc->buflen) {
3041 cgc->buflen = offset + 16;
3042 ret = cdrom_mode_sense(cdi, cgc,
3043 GPMODE_AUDIO_CTL_PAGE, 0);
3044 if (ret)
3045 return ret;
3046 }
3047
3048 /* sanity check */
3049 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3050 buffer[offset + 1] < 14)
3051 return -EINVAL;
3052
3053 /* now we have the current volume settings. if it was only
3054 a CDROMVOLREAD, return these values */
3055 if (cmd == CDROMVOLREAD) {
3056 volctrl.channel0 = buffer[offset+9];
3057 volctrl.channel1 = buffer[offset+11];
3058 volctrl.channel2 = buffer[offset+13];
3059 volctrl.channel3 = buffer[offset+15];
3060 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
3061 return 0;
3062 }
3063
3064 /* get the volume mask */
3065 cgc->buffer = mask;
3066 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3067 if (ret)
3068 return ret;
3069
3070 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3071 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3072 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3073 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3074
3075 /* set volume */
3076 cgc->buffer = buffer + offset - 8;
3077 memset(cgc->buffer, 0, 8);
3078 return cdrom_mode_select(cdi, cgc);
3079}
3080
3081static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3082 struct packet_command *cgc,
3083 int cmd)
3084{
3085 struct cdrom_device_ops *cdo = cdi->ops;
3086 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3087 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3088 cgc->cmd[1] = 1;
3089 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3090 cgc->data_direction = CGC_DATA_NONE;
3091 return cdo->generic_packet(cdi, cgc);
3092}
3093
3094static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3095 struct packet_command *cgc,
3096 int cmd)
3097{
3098 struct cdrom_device_ops *cdo = cdi->ops;
3099 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3100 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3101 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3102 cgc->data_direction = CGC_DATA_NONE;
3103 return cdo->generic_packet(cdi, cgc);
3104}
3105
3106static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3107 void __user *arg,
3108 struct packet_command *cgc)
3109{
3110 int ret;
3111 dvd_struct *s;
3112 int size = sizeof(dvd_struct);
3113
3114 if (!CDROM_CAN(CDC_DVD))
3115 return -ENOSYS;
3116
3117 s = kmalloc(size, GFP_KERNEL);
3118 if (!s)
3119 return -ENOMEM;
3120
3121 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3122 if (copy_from_user(s, arg, size)) {
3123 kfree(s);
3124 return -EFAULT;
3125 }
3126
3127 ret = dvd_read_struct(cdi, s, cgc);
3128 if (ret)
3129 goto out;
3130
3131 if (copy_to_user(arg, s, size))
3132 ret = -EFAULT;
3133out:
3134 kfree(s);
3135 return ret;
3136}
3137
3138static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3139 void __user *arg)
3140{
3141 int ret;
3142 dvd_authinfo ai;
3143 if (!CDROM_CAN(CDC_DVD))
3144 return -ENOSYS;
3145 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3146 IOCTL_IN(arg, dvd_authinfo, ai);
3147 ret = dvd_do_auth(cdi, &ai);
3148 if (ret)
3149 return ret;
3150 IOCTL_OUT(arg, dvd_authinfo, ai);
3151 return 0;
3152}
3153
3154static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3155 void __user *arg)
3156{
3157 int ret;
3158 long next = 0;
3159 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3160 ret = cdrom_get_next_writable(cdi, &next);
3161 if (ret)
3162 return ret;
3163 IOCTL_OUT(arg, long, next);
3164 return 0;
3165}
3166
3167static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3168 void __user *arg)
3169{
3170 int ret;
3171 long last = 0;
3172 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3173 ret = cdrom_get_last_written(cdi, &last);
3174 if (ret)
3175 return ret;
3176 IOCTL_OUT(arg, long, last);
3177 return 0;
3178}
3179
3180static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3181 unsigned long arg)
3182{
3183 struct packet_command cgc;
3184 void __user *userptr = (void __user *)arg;
3185
3186 memset(&cgc, 0, sizeof(cgc));
3187
3188 /* build a unified command and queue it through
3189 cdo->generic_packet() */
3190 switch (cmd) {
3191 case CDROMREADRAW:
3192 case CDROMREADMODE1:
3193 case CDROMREADMODE2:
3194 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3195 case CDROMREADAUDIO:
3196 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3197 case CDROMSUBCHNL:
3198 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3199 case CDROMPLAYMSF:
3200 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3201 case CDROMPLAYBLK:
3202 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3203 case CDROMVOLCTRL:
3204 case CDROMVOLREAD:
3205 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3206 case CDROMSTART:
3207 case CDROMSTOP:
3208 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3209 case CDROMPAUSE:
3210 case CDROMRESUME:
3211 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3212 case DVD_READ_STRUCT:
3213 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3214 case DVD_AUTH:
3215 return mmc_ioctl_dvd_auth(cdi, userptr);
3216 case CDROM_NEXT_WRITABLE:
3217 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3218 case CDROM_LAST_WRITTEN:
3219 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3220 }
3221
3222 return -ENOTTY;
3223}
3224
3225static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3226 track_information *ti)
3227{
3228 struct cdrom_device_ops *cdo = cdi->ops;
3229 struct packet_command cgc;
3230 int ret, buflen;
3231
3232 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3233 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3234 cgc.cmd[1] = type & 3;
3235 cgc.cmd[4] = (track & 0xff00) >> 8;
3236 cgc.cmd[5] = track & 0xff;
3237 cgc.cmd[8] = 8;
3238 cgc.quiet = 1;
3239
3240 if ((ret = cdo->generic_packet(cdi, &cgc)))
3241 return ret;
3242
3243 buflen = be16_to_cpu(ti->track_information_length) +
3244 sizeof(ti->track_information_length);
3245
3246 if (buflen > sizeof(track_information))
3247 buflen = sizeof(track_information);
3248
3249 cgc.cmd[8] = cgc.buflen = buflen;
3250 if ((ret = cdo->generic_packet(cdi, &cgc)))
3251 return ret;
3252
3253 /* return actual fill size */
3254 return buflen;
3255}
3256
3257/* requires CD R/RW */
3258static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3259{
3260 struct cdrom_device_ops *cdo = cdi->ops;
3261 struct packet_command cgc;
3262 int ret, buflen;
3263
3264 /* set up command and get the disc info */
3265 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3266 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3267 cgc.cmd[8] = cgc.buflen = 2;
3268 cgc.quiet = 1;
3269
3270 if ((ret = cdo->generic_packet(cdi, &cgc)))
3271 return ret;
3272
3273 /* not all drives have the same disc_info length, so requeue
3274 * packet with the length the drive tells us it can supply
3275 */
3276 buflen = be16_to_cpu(di->disc_information_length) +
3277 sizeof(di->disc_information_length);
3278
3279 if (buflen > sizeof(disc_information))
3280 buflen = sizeof(disc_information);
3281
3282 cgc.cmd[8] = cgc.buflen = buflen;
3283 if ((ret = cdo->generic_packet(cdi, &cgc)))
3284 return ret;
3285
3286 /* return actual fill size */
3287 return buflen;
3288}
3289
3290/* return the last written block on the CD-R media. this is for the udf
3291 file system. */
3292int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3293{
3294 struct cdrom_tocentry toc;
3295 disc_information di;
3296 track_information ti;
3297 __u32 last_track;
3298 int ret = -1, ti_size;
3299
3300 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3301 goto use_toc;
3302
3303 ret = cdrom_get_disc_info(cdi, &di);
3304 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3305 + sizeof(di.last_track_lsb)))
3306 goto use_toc;
3307
3308 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3309 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3310 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3311 if (ti_size < (int)offsetof(typeof(ti), track_start))
3312 goto use_toc;
3313
3314 /* if this track is blank, try the previous. */
3315 if (ti.blank) {
3316 if (last_track==1)
3317 goto use_toc;
3318 last_track--;
3319 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3320 }
3321
3322 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3323 + sizeof(ti.track_size)))
3324 goto use_toc;
3325
3326 /* if last recorded field is valid, return it. */
3327 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3328 + sizeof(ti.last_rec_address))) {
3329 *last_written = be32_to_cpu(ti.last_rec_address);
3330 } else {
3331 /* make it up instead */
3332 *last_written = be32_to_cpu(ti.track_start) +
3333 be32_to_cpu(ti.track_size);
3334 if (ti.free_blocks)
3335 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3336 }
3337 return 0;
3338
3339 /* this is where we end up if the drive either can't do a
3340 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3341 it doesn't give enough information or fails. then we return
3342 the toc contents. */
3343use_toc:
3344 toc.cdte_format = CDROM_MSF;
3345 toc.cdte_track = CDROM_LEADOUT;
3346 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3347 return ret;
3348 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3349 *last_written = toc.cdte_addr.lba;
3350 return 0;
3351}
3352
3353/* return the next writable block. also for udf file system. */
3354static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3355{
3356 disc_information di;
3357 track_information ti;
3358 __u16 last_track;
3359 int ret, ti_size;
3360
3361 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3362 goto use_last_written;
3363
3364 ret = cdrom_get_disc_info(cdi, &di);
3365 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3366 + sizeof(di.last_track_lsb))
3367 goto use_last_written;
3368
3369 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3370 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3371 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3372 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3373 goto use_last_written;
3374
3375 /* if this track is blank, try the previous. */
3376 if (ti.blank) {
3377 if (last_track == 1)
3378 goto use_last_written;
3379 last_track--;
3380 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3381 if (ti_size < 0)
3382 goto use_last_written;
3383 }
3384
3385 /* if next recordable address field is valid, use it. */
3386 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3387 + sizeof(ti.next_writable)) {
3388 *next_writable = be32_to_cpu(ti.next_writable);
3389 return 0;
3390 }
3391
3392use_last_written:
3393 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3394 *next_writable = 0;
3395 return ret;
3396 } else {
3397 *next_writable += 7;
3398 return 0;
3399 }
3400}
3401
3402EXPORT_SYMBOL(cdrom_get_last_written);
3403EXPORT_SYMBOL(register_cdrom);
3404EXPORT_SYMBOL(unregister_cdrom);
3405EXPORT_SYMBOL(cdrom_open);
3406EXPORT_SYMBOL(cdrom_release);
3407EXPORT_SYMBOL(cdrom_ioctl);
3408EXPORT_SYMBOL(cdrom_media_changed);
3409EXPORT_SYMBOL(cdrom_number_of_slots);
3410EXPORT_SYMBOL(cdrom_mode_select);
3411EXPORT_SYMBOL(cdrom_mode_sense);
3412EXPORT_SYMBOL(init_cdrom_command);
3413EXPORT_SYMBOL(cdrom_get_media_event);
3414
3415#ifdef CONFIG_SYSCTL
3416
3417#define CDROM_STR_SIZE 1000
3418
3419static struct cdrom_sysctl_settings {
3420 char info[CDROM_STR_SIZE]; /* general info */
3421 int autoclose; /* close tray upon mount, etc */
3422 int autoeject; /* eject on umount */
3423 int debug; /* turn on debugging messages */
3424 int lock; /* lock the door on device open */
3425 int check; /* check media type */
3426} cdrom_sysctl_settings;
3427
3428enum cdrom_print_option {
3429 CTL_NAME,
3430 CTL_SPEED,
3431 CTL_SLOTS,
3432 CTL_CAPABILITY
3433};
3434
3435static int cdrom_print_info(const char *header, int val, char *info,
3436 int *pos, enum cdrom_print_option option)
3437{
3438 const int max_size = sizeof(cdrom_sysctl_settings.info);
3439 struct cdrom_device_info *cdi;
3440 int ret;
3441
3442 ret = scnprintf(info + *pos, max_size - *pos, header);
3443 if (!ret)
3444 return 1;
3445
3446 *pos += ret;
3447
3448 list_for_each_entry(cdi, &cdrom_list, list) {
3449 switch (option) {
3450 case CTL_NAME:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%s", cdi->name);
3453 break;
3454 case CTL_SPEED:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", cdi->speed);
3457 break;
3458 case CTL_SLOTS:
3459 ret = scnprintf(info + *pos, max_size - *pos,
3460 "\t%d", cdi->capacity);
3461 break;
3462 case CTL_CAPABILITY:
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%d", CDROM_CAN(val) != 0);
3465 break;
3466 default:
3467 pr_info("invalid option%d\n", option);
3468 return 1;
3469 }
3470 if (!ret)
3471 return 1;
3472 *pos += ret;
3473 }
3474
3475 return 0;
3476}
3477
3478static int cdrom_sysctl_info(ctl_table *ctl, int write,
3479 void __user *buffer, size_t *lenp, loff_t *ppos)
3480{
3481 int pos;
3482 char *info = cdrom_sysctl_settings.info;
3483 const int max_size = sizeof(cdrom_sysctl_settings.info);
3484
3485 if (!*lenp || (*ppos && !write)) {
3486 *lenp = 0;
3487 return 0;
3488 }
3489
3490 mutex_lock(&cdrom_mutex);
3491
3492 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3493
3494 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3495 goto done;
3496 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3497 goto done;
3498 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3499 goto done;
3500 if (cdrom_print_info("\nCan close tray:\t",
3501 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3502 goto done;
3503 if (cdrom_print_info("\nCan open tray:\t",
3504 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3505 goto done;
3506 if (cdrom_print_info("\nCan lock tray:\t",
3507 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3508 goto done;
3509 if (cdrom_print_info("\nCan change speed:",
3510 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3511 goto done;
3512 if (cdrom_print_info("\nCan select disk:",
3513 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3514 goto done;
3515 if (cdrom_print_info("\nCan read multisession:",
3516 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3517 goto done;
3518 if (cdrom_print_info("\nCan read MCN:\t",
3519 CDC_MCN, info, &pos, CTL_CAPABILITY))
3520 goto done;
3521 if (cdrom_print_info("\nReports media changed:",
3522 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3523 goto done;
3524 if (cdrom_print_info("\nCan play audio:\t",
3525 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3526 goto done;
3527 if (cdrom_print_info("\nCan write CD-R:\t",
3528 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3529 goto done;
3530 if (cdrom_print_info("\nCan write CD-RW:",
3531 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3532 goto done;
3533 if (cdrom_print_info("\nCan read DVD:\t",
3534 CDC_DVD, info, &pos, CTL_CAPABILITY))
3535 goto done;
3536 if (cdrom_print_info("\nCan write DVD-R:",
3537 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3538 goto done;
3539 if (cdrom_print_info("\nCan write DVD-RAM:",
3540 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3541 goto done;
3542 if (cdrom_print_info("\nCan read MRW:\t",
3543 CDC_MRW, info, &pos, CTL_CAPABILITY))
3544 goto done;
3545 if (cdrom_print_info("\nCan write MRW:\t",
3546 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3547 goto done;
3548 if (cdrom_print_info("\nCan write RAM:\t",
3549 CDC_RAM, info, &pos, CTL_CAPABILITY))
3550 goto done;
3551 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3552 goto done;
3553doit:
3554 mutex_unlock(&cdrom_mutex);
3555 return proc_dostring(ctl, write, buffer, lenp, ppos);
3556done:
3557 pr_info("info buffer too small\n");
3558 goto doit;
3559}
3560
3561/* Unfortunately, per device settings are not implemented through
3562 procfs/sysctl yet. When they are, this will naturally disappear. For now
3563 just update all drives. Later this will become the template on which
3564 new registered drives will be based. */
3565static void cdrom_update_settings(void)
3566{
3567 struct cdrom_device_info *cdi;
3568
3569 mutex_lock(&cdrom_mutex);
3570 list_for_each_entry(cdi, &cdrom_list, list) {
3571 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3572 cdi->options |= CDO_AUTO_CLOSE;
3573 else if (!autoclose)
3574 cdi->options &= ~CDO_AUTO_CLOSE;
3575 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3576 cdi->options |= CDO_AUTO_EJECT;
3577 else if (!autoeject)
3578 cdi->options &= ~CDO_AUTO_EJECT;
3579 if (lockdoor && CDROM_CAN(CDC_LOCK))
3580 cdi->options |= CDO_LOCK;
3581 else if (!lockdoor)
3582 cdi->options &= ~CDO_LOCK;
3583 if (check_media_type)
3584 cdi->options |= CDO_CHECK_TYPE;
3585 else
3586 cdi->options &= ~CDO_CHECK_TYPE;
3587 }
3588 mutex_unlock(&cdrom_mutex);
3589}
3590
3591static int cdrom_sysctl_handler(ctl_table *ctl, int write,
3592 void __user *buffer, size_t *lenp, loff_t *ppos)
3593{
3594 int ret;
3595
3596 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3597
3598 if (write) {
3599
3600 /* we only care for 1 or 0. */
3601 autoclose = !!cdrom_sysctl_settings.autoclose;
3602 autoeject = !!cdrom_sysctl_settings.autoeject;
3603 debug = !!cdrom_sysctl_settings.debug;
3604 lockdoor = !!cdrom_sysctl_settings.lock;
3605 check_media_type = !!cdrom_sysctl_settings.check;
3606
3607 /* update the option flags according to the changes. we
3608 don't have per device options through sysctl yet,
3609 but we will have and then this will disappear. */
3610 cdrom_update_settings();
3611 }
3612
3613 return ret;
3614}
3615
3616/* Place files in /proc/sys/dev/cdrom */
3617static ctl_table cdrom_table[] = {
3618 {
3619 .procname = "info",
3620 .data = &cdrom_sysctl_settings.info,
3621 .maxlen = CDROM_STR_SIZE,
3622 .mode = 0444,
3623 .proc_handler = cdrom_sysctl_info,
3624 },
3625 {
3626 .procname = "autoclose",
3627 .data = &cdrom_sysctl_settings.autoclose,
3628 .maxlen = sizeof(int),
3629 .mode = 0644,
3630 .proc_handler = cdrom_sysctl_handler,
3631 },
3632 {
3633 .procname = "autoeject",
3634 .data = &cdrom_sysctl_settings.autoeject,
3635 .maxlen = sizeof(int),
3636 .mode = 0644,
3637 .proc_handler = cdrom_sysctl_handler,
3638 },
3639 {
3640 .procname = "debug",
3641 .data = &cdrom_sysctl_settings.debug,
3642 .maxlen = sizeof(int),
3643 .mode = 0644,
3644 .proc_handler = cdrom_sysctl_handler,
3645 },
3646 {
3647 .procname = "lock",
3648 .data = &cdrom_sysctl_settings.lock,
3649 .maxlen = sizeof(int),
3650 .mode = 0644,
3651 .proc_handler = cdrom_sysctl_handler,
3652 },
3653 {
3654 .procname = "check_media",
3655 .data = &cdrom_sysctl_settings.check,
3656 .maxlen = sizeof(int),
3657 .mode = 0644,
3658 .proc_handler = cdrom_sysctl_handler
3659 },
3660 { }
3661};
3662
3663static ctl_table cdrom_cdrom_table[] = {
3664 {
3665 .procname = "cdrom",
3666 .maxlen = 0,
3667 .mode = 0555,
3668 .child = cdrom_table,
3669 },
3670 { }
3671};
3672
3673/* Make sure that /proc/sys/dev is there */
3674static ctl_table cdrom_root_table[] = {
3675 {
3676 .procname = "dev",
3677 .maxlen = 0,
3678 .mode = 0555,
3679 .child = cdrom_cdrom_table,
3680 },
3681 { }
3682};
3683static struct ctl_table_header *cdrom_sysctl_header;
3684
3685static void cdrom_sysctl_register(void)
3686{
3687 static int initialized;
3688
3689 if (initialized == 1)
3690 return;
3691
3692 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3693
3694 /* set the defaults */
3695 cdrom_sysctl_settings.autoclose = autoclose;
3696 cdrom_sysctl_settings.autoeject = autoeject;
3697 cdrom_sysctl_settings.debug = debug;
3698 cdrom_sysctl_settings.lock = lockdoor;
3699 cdrom_sysctl_settings.check = check_media_type;
3700
3701 initialized = 1;
3702}
3703
3704static void cdrom_sysctl_unregister(void)
3705{
3706 if (cdrom_sysctl_header)
3707 unregister_sysctl_table(cdrom_sysctl_header);
3708}
3709
3710#else /* CONFIG_SYSCTL */
3711
3712static void cdrom_sysctl_register(void)
3713{
3714}
3715
3716static void cdrom_sysctl_unregister(void)
3717{
3718}
3719
3720#endif /* CONFIG_SYSCTL */
3721
3722static int __init cdrom_init(void)
3723{
3724 cdrom_sysctl_register();
3725
3726 return 0;
3727}
3728
3729static void __exit cdrom_exit(void)
3730{
3731 pr_info("Uniform CD-ROM driver unloaded\n");
3732 cdrom_sysctl_unregister();
3733}
3734
3735module_init(cdrom_init);
3736module_exit(cdrom_exit);
3737MODULE_LICENSE("GPL");