Loading...
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.rst 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 Revision History
18 ----------------------------------
19 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
20 -- Initial version by David A. van Leeuwen. I don't have a detailed
21 changelog for the 1.x series, David?
22
232.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
24 -- New maintainer! As David A. van Leeuwen has been too busy to actively
25 maintain and improve this driver, I am now carrying on the torch. If
26 you have a problem with this driver, please feel free to contact me.
27
28 -- Added (rudimentary) sysctl interface. I realize this is really weak
29 right now, and is _very_ badly implemented. It will be improved...
30
31 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
32 the Uniform CD-ROM driver via the cdrom_count_tracks function.
33 The cdrom_count_tracks function helps resolve some of the false
34 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
35 for the correct media type when mounting or playing audio from a CD.
36
37 -- Remove the calls to verify_area and only use the copy_from_user and
38 copy_to_user stuff, since these calls now provide their own memory
39 checking with the 2.1.x kernels.
40
41 -- Major update to return codes so that errors from low-level drivers
42 are passed on through (thanks to Gerd Knorr for pointing out this
43 problem).
44
45 -- Made it so if a function isn't implemented in a low-level driver,
46 ENOSYS is now returned instead of EINVAL.
47
48 -- Simplified some complex logic so that the source code is easier to read.
49
50 -- Other stuff I probably forgot to mention (lots of changes).
51
522.01 to 2.11 Dec 1997-Jan 1998
53 -- TO-DO! Write changelogs for 2.01 to 2.12.
54
552.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
56 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
57 copy_*_user does not return EFAULT on error, but instead returns the number
58 of bytes not copied. I was returning whatever non-zero stuff came back from
59 the copy_*_user functions directly, which would result in strange errors.
60
612.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
62 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
63 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
64 this out and providing a simple fix.
65 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
66 thanks to Andrea Arcangeli
67 -- Fixed it so that the /proc entry now also shows up when cdrom is
68 compiled into the kernel. Before it only worked when loaded as a module.
69
70 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in cdrom_media_changed and handling of reporting that
72 the media had changed for devices that _don't_ implement media_changed.
73 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
74 -- Made a few things more pedanticly correct.
75
762.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
77 -- New maintainers! Erik was too busy to continue the work on the driver,
78 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
79 will do their best to follow in his footsteps
80
81 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
82 -- Check if drive is capable of doing what we ask before blindly changing
83 cdi->options in various ioctl.
84 -- Added version to proc entry.
85
86 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
87 -- Fixed an error in open_for_data where we would sometimes not return
88 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
89 -- Fixed module usage count - usage was based on /proc/sys/dev
90 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
91 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
92 dev would be removed even though it was used. cdrom.c just illuminated
93 that bug.
94
95 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
97 been "rewritten" because capabilities and options aren't in sync. They
98 should be...
99 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
100 -- Added CDROM_RESET ioctl.
101 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
102 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
103 from parsing /proc/sys/dev/cdrom/info.
104
105 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
106 -- Check capability mask from low level driver when counting tracks as
107 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
108
109 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
110 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
111 CDC_CLOSE_TRAY.
112 -- proc info didn't mask against capabilities mask.
113
114 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
115 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
116 code was duplicated before. Drives that support the generic packet
117 interface are now being fed packets from here instead.
118 -- First attempt at adding support for MMC2 commands - for DVD and
119 CD-R(W) drives. Only the DVD parts are in now - the interface used is
120 the same as for the audio ioctls.
121 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
122 a change to perform device specific ioctls as well.
123 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
124 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
125 and lock.
126 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
127 CD-Rx and DVD capabilities.
128 -- Now default to checking media type.
129 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
130 doing this anyway, with the generic_packet addition.
131
132 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
133 -- Fix up the sysctl handling so that the option flags get set
134 correctly.
135 -- Fix up ioctl handling so the device specific ones actually get
136 called :).
137
138 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
139 -- Fixed volume control on SCSI drives (or others with longer audio
140 page).
141 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
142 <andrewtv@usa.net> for telling me and for having defined the various
143 DVD structures and ioctls in the first place! He designed the original
144 DVD patches for ide-cd and while I rearranged and unified them, the
145 interface is still the same.
146
147 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
148 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
149 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
150 -- Moved the CDROMREADxxx ioctls in here.
151 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
152 and exported functions.
153 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
154 to now read GPCMD_ for the new generic packet interface. All low level
155 drivers are updated as well.
156 -- Various other cleanups.
157
158 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
159 -- Fixed a couple of possible memory leaks (if an operation failed and
160 we didn't free the buffer before returning the error).
161 -- Integrated Uniform CD Changer handling from Richard Sharman
162 <rsharman@pobox.com>.
163 -- Defined CD_DVD and CD_CHANGER log levels.
164 -- Fixed the CDROMREADxxx ioctls.
165 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
166 drives supported it. We lose the index part, however.
167 -- Small modifications to accommodate opens of /dev/hdc1, required
168 for ide-cd to handle multisession discs.
169 -- Export cdrom_mode_sense and cdrom_mode_select.
170 -- init_cdrom_command() for setting up a cgc command.
171
172 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
173 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
174 impossible to send the drive data in a sensible way.
175 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
176 dvd_read_manufact.
177 -- Added setup of write mode for packet writing.
178 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
179 number of frames and split the reads in blocks of 8.
180
181 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
182 -- Added support for changing the region of DVD drives.
183 -- Added sense data to generic command.
184
185 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
186 -- Do same "read header length" trick in cdrom_get_disc_info() as
187 we do in cdrom_get_track_info() -- some drive don't obey specs and
188 fail if they can't supply the full Mt Fuji size table.
189 -- Deleted stuff related to setting up write modes. It has a different
190 home now.
191 -- Clear header length in mode_select unconditionally.
192 -- Removed the register_disk() that was added, not needed here.
193
194 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
195 -- Fix direction flag in setup_send_key and setup_report_key. This
196 gave some SCSI adapters problems.
197 -- Always return -EROFS for write opens
198 -- Convert to module_init/module_exit style init and remove some
199 of the #ifdef MODULE stuff
200 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
201 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
202 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
203 did not clear a 0 sized buffer.
204
205 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
206 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
207 that case switch block size and issue plain READ_10 again, then switch
208 back.
209
210 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
211 -- Fix volume control on CD's - old SCSI-II drives now use their own
212 code, as doing MODE6 stuff in here is really not my intention.
213 -- Use READ_DISC_INFO for more reliable end-of-disc.
214
215 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
216 -- Fix bug in getting rpc phase 2 region info.
217 -- Reinstate "correct" CDROMPLAYTRKIND
218
219 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
220 -- Use quiet bit on packet commands not known to work
221
222 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
223 -- Various fixes and lots of cleanups not listed :-)
224 -- Locking fixes
225 -- Mt Rainier support
226 -- DVD-RAM write open fixes
227
228 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
229 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
230
231 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
232 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
233
234-------------------------------------------------------------------------*/
235
236#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
237
238#define REVISION "Revision: 3.20"
239#define VERSION "Id: cdrom.c 3.20 2003/12/17"
240
241/* I use an error-log mask to give fine grain control over the type of
242 messages dumped to the system logs. The available masks include: */
243#define CD_NOTHING 0x0
244#define CD_WARNING 0x1
245#define CD_REG_UNREG 0x2
246#define CD_DO_IOCTL 0x4
247#define CD_OPEN 0x8
248#define CD_CLOSE 0x10
249#define CD_COUNT_TRACKS 0x20
250#define CD_CHANGER 0x40
251#define CD_DVD 0x80
252
253/* Define this to remove _all_ the debugging messages */
254/* #define ERRLOGMASK CD_NOTHING */
255#define ERRLOGMASK CD_WARNING
256/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
257/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
258
259#include <linux/atomic.h>
260#include <linux/module.h>
261#include <linux/fs.h>
262#include <linux/major.h>
263#include <linux/types.h>
264#include <linux/errno.h>
265#include <linux/kernel.h>
266#include <linux/mm.h>
267#include <linux/slab.h>
268#include <linux/cdrom.h>
269#include <linux/sysctl.h>
270#include <linux/proc_fs.h>
271#include <linux/blkpg.h>
272#include <linux/init.h>
273#include <linux/fcntl.h>
274#include <linux/blkdev.h>
275#include <linux/times.h>
276#include <linux/uaccess.h>
277#include <scsi/scsi_common.h>
278
279/* used to tell the module to turn on full debugging messages */
280static bool debug;
281/* default compatibility mode */
282static bool autoclose=1;
283static bool autoeject;
284static bool lockdoor = 1;
285/* will we ever get to use this... sigh. */
286static bool check_media_type;
287/* automatically restart mrw format */
288static bool mrw_format_restart = 1;
289module_param(debug, bool, 0);
290module_param(autoclose, bool, 0);
291module_param(autoeject, bool, 0);
292module_param(lockdoor, bool, 0);
293module_param(check_media_type, bool, 0);
294module_param(mrw_format_restart, bool, 0);
295
296static DEFINE_MUTEX(cdrom_mutex);
297
298static const char *mrw_format_status[] = {
299 "not mrw",
300 "bgformat inactive",
301 "bgformat active",
302 "mrw complete",
303};
304
305static const char *mrw_address_space[] = { "DMA", "GAA" };
306
307#if (ERRLOGMASK != CD_NOTHING)
308#define cd_dbg(type, fmt, ...) \
309do { \
310 if ((ERRLOGMASK & type) || debug == 1) \
311 pr_debug(fmt, ##__VA_ARGS__); \
312} while (0)
313#else
314#define cd_dbg(type, fmt, ...) \
315do { \
316 if (0 && (ERRLOGMASK & type) || debug == 1) \
317 pr_debug(fmt, ##__VA_ARGS__); \
318} while (0)
319#endif
320
321/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
322 a lot of places. This macro makes the code more clear. */
323#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
324
325/*
326 * Another popular OS uses 7 seconds as the hard timeout for default
327 * commands, so it is a good choice for us as well.
328 */
329#define CDROM_DEF_TIMEOUT (7 * HZ)
330
331/* Not-exported routines. */
332
333static void cdrom_sysctl_register(void);
334
335static LIST_HEAD(cdrom_list);
336
337static void signal_media_change(struct cdrom_device_info *cdi)
338{
339 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */
340 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
341}
342
343int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
344 struct packet_command *cgc)
345{
346 if (cgc->sshdr) {
347 cgc->sshdr->sense_key = 0x05;
348 cgc->sshdr->asc = 0x20;
349 cgc->sshdr->ascq = 0x00;
350 }
351
352 cgc->stat = -EIO;
353 return -EIO;
354}
355EXPORT_SYMBOL(cdrom_dummy_generic_packet);
356
357static int cdrom_flush_cache(struct cdrom_device_info *cdi)
358{
359 struct packet_command cgc;
360
361 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
362 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
363
364 cgc.timeout = 5 * 60 * HZ;
365
366 return cdi->ops->generic_packet(cdi, &cgc);
367}
368
369/* requires CD R/RW */
370static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
371 disc_information *di)
372{
373 const struct cdrom_device_ops *cdo = cdi->ops;
374 struct packet_command cgc;
375 int ret, buflen;
376
377 /* set up command and get the disc info */
378 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
379 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
380 cgc.cmd[8] = cgc.buflen = 2;
381 cgc.quiet = 1;
382
383 ret = cdo->generic_packet(cdi, &cgc);
384 if (ret)
385 return ret;
386
387 /* not all drives have the same disc_info length, so requeue
388 * packet with the length the drive tells us it can supply
389 */
390 buflen = be16_to_cpu(di->disc_information_length) +
391 sizeof(di->disc_information_length);
392
393 if (buflen > sizeof(disc_information))
394 buflen = sizeof(disc_information);
395
396 cgc.cmd[8] = cgc.buflen = buflen;
397 ret = cdo->generic_packet(cdi, &cgc);
398 if (ret)
399 return ret;
400
401 /* return actual fill size */
402 return buflen;
403}
404
405/* This macro makes sure we don't have to check on cdrom_device_ops
406 * existence in the run-time routines below. Change_capability is a
407 * hack to have the capability flags defined const, while we can still
408 * change it here without gcc complaining at every line.
409 */
410#define ENSURE(cdo, call, bits) \
411do { \
412 if (cdo->call == NULL) \
413 WARN_ON_ONCE((cdo)->capability & (bits)); \
414} while (0)
415
416/*
417 * the first prototypes used 0x2c as the page code for the mrw mode page,
418 * subsequently this was changed to 0x03. probe the one used by this drive
419 */
420static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
421{
422 struct packet_command cgc;
423 char buffer[16];
424
425 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
426
427 cgc.timeout = HZ;
428 cgc.quiet = 1;
429
430 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
431 cdi->mrw_mode_page = MRW_MODE_PC;
432 return 0;
433 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
434 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
435 return 0;
436 }
437
438 return 1;
439}
440
441static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
442{
443 struct packet_command cgc;
444 struct mrw_feature_desc *mfd;
445 unsigned char buffer[16];
446 int ret;
447
448 *write = 0;
449
450 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
451
452 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
453 cgc.cmd[3] = CDF_MRW;
454 cgc.cmd[8] = sizeof(buffer);
455 cgc.quiet = 1;
456
457 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
458 return ret;
459
460 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
461 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
462 return 1;
463 *write = mfd->write;
464
465 if ((ret = cdrom_mrw_probe_pc(cdi))) {
466 *write = 0;
467 return ret;
468 }
469
470 return 0;
471}
472
473static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
474{
475 struct packet_command cgc;
476 unsigned char buffer[12];
477 int ret;
478
479 pr_info("%sstarting format\n", cont ? "Re" : "");
480
481 /*
482 * FmtData bit set (bit 4), format type is 1
483 */
484 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
485 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
486 cgc.cmd[1] = (1 << 4) | 1;
487
488 cgc.timeout = 5 * 60 * HZ;
489
490 /*
491 * 4 byte format list header, 8 byte format list descriptor
492 */
493 buffer[1] = 1 << 1;
494 buffer[3] = 8;
495
496 /*
497 * nr_blocks field
498 */
499 buffer[4] = 0xff;
500 buffer[5] = 0xff;
501 buffer[6] = 0xff;
502 buffer[7] = 0xff;
503
504 buffer[8] = 0x24 << 2;
505 buffer[11] = cont;
506
507 ret = cdi->ops->generic_packet(cdi, &cgc);
508 if (ret)
509 pr_info("bgformat failed\n");
510
511 return ret;
512}
513
514static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
515{
516 struct packet_command cgc;
517
518 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
519 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
520
521 /*
522 * Session = 1, Track = 0
523 */
524 cgc.cmd[1] = !!immed;
525 cgc.cmd[2] = 1 << 1;
526
527 cgc.timeout = 5 * 60 * HZ;
528
529 return cdi->ops->generic_packet(cdi, &cgc);
530}
531
532static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
533{
534 disc_information di;
535 int ret;
536
537 ret = cdrom_get_disc_info(cdi, &di);
538 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
539 return 1;
540
541 ret = 0;
542 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
543 pr_info("issuing MRW background format suspend\n");
544 ret = cdrom_mrw_bgformat_susp(cdi, 0);
545 }
546
547 if (!ret && cdi->media_written)
548 ret = cdrom_flush_cache(cdi);
549
550 return ret;
551}
552
553static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
554{
555 struct packet_command cgc;
556 struct mode_page_header *mph;
557 char buffer[16];
558 int ret, offset, size;
559
560 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
561
562 cgc.buffer = buffer;
563 cgc.buflen = sizeof(buffer);
564
565 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
566 if (ret)
567 return ret;
568
569 mph = (struct mode_page_header *)buffer;
570 offset = be16_to_cpu(mph->desc_length);
571 size = be16_to_cpu(mph->mode_data_length) + 2;
572
573 buffer[offset + 3] = space;
574 cgc.buflen = size;
575
576 ret = cdrom_mode_select(cdi, &cgc);
577 if (ret)
578 return ret;
579
580 pr_info("%s: mrw address space %s selected\n",
581 cdi->name, mrw_address_space[space]);
582 return 0;
583}
584
585int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
586{
587 static char banner_printed;
588 const struct cdrom_device_ops *cdo = cdi->ops;
589
590 cd_dbg(CD_OPEN, "entering register_cdrom\n");
591
592 if (cdo->open == NULL || cdo->release == NULL)
593 return -EINVAL;
594 if (!banner_printed) {
595 pr_info("Uniform CD-ROM driver " REVISION "\n");
596 banner_printed = 1;
597 cdrom_sysctl_register();
598 }
599
600 cdi->disk = disk;
601 disk->cdi = cdi;
602
603 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL)
605 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
606 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(cdo, lock_door, CDC_LOCK);
608 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
609 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
610 ENSURE(cdo, get_mcn, CDC_MCN);
611 ENSURE(cdo, reset, CDC_RESET);
612 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
613 cdi->mc_flags = 0;
614 cdi->options = CDO_USE_FFLAGS;
615 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
616
617 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
618 cdi->options |= (int) CDO_AUTO_CLOSE;
619 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
620 cdi->options |= (int) CDO_AUTO_EJECT;
621 if (lockdoor == 1)
622 cdi->options |= (int) CDO_LOCK;
623 if (check_media_type == 1)
624 cdi->options |= (int) CDO_CHECK_TYPE;
625
626 if (CDROM_CAN(CDC_MRW_W))
627 cdi->exit = cdrom_mrw_exit;
628
629 if (cdi->ops->read_cdda_bpc)
630 cdi->cdda_method = CDDA_BPC_FULL;
631 else
632 cdi->cdda_method = CDDA_OLD;
633
634 WARN_ON(!cdo->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}
642EXPORT_SYMBOL(register_cdrom);
643#undef ENSURE
644
645void unregister_cdrom(struct cdrom_device_info *cdi)
646{
647 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
648
649 mutex_lock(&cdrom_mutex);
650 list_del(&cdi->list);
651 mutex_unlock(&cdrom_mutex);
652
653 if (cdi->exit)
654 cdi->exit(cdi);
655
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658EXPORT_SYMBOL(unregister_cdrom);
659
660int cdrom_get_media_event(struct cdrom_device_info *cdi,
661 struct media_event_desc *med)
662{
663 struct packet_command cgc;
664 unsigned char buffer[8];
665 struct event_header *eh = (struct event_header *)buffer;
666
667 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
668 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
669 cgc.cmd[1] = 1; /* IMMED */
670 cgc.cmd[4] = 1 << 4; /* media event */
671 cgc.cmd[8] = sizeof(buffer);
672 cgc.quiet = 1;
673
674 if (cdi->ops->generic_packet(cdi, &cgc))
675 return 1;
676
677 if (be16_to_cpu(eh->data_len) < sizeof(*med))
678 return 1;
679
680 if (eh->nea || eh->notification_class != 0x4)
681 return 1;
682
683 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
684 return 0;
685}
686EXPORT_SYMBOL(cdrom_get_media_event);
687
688static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
689 struct rwrt_feature_desc *rfd)
690{
691 struct packet_command cgc;
692 char buffer[24];
693 int ret;
694
695 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
696
697 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
698 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
699 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
700 cgc.quiet = 1;
701
702 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
703 return ret;
704
705 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
706 return 0;
707}
708
709static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
710{
711 struct packet_command cgc;
712 char buffer[16];
713 __be16 *feature_code;
714 int ret;
715
716 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
717
718 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
719 cgc.cmd[3] = CDF_HWDM;
720 cgc.cmd[8] = sizeof(buffer);
721 cgc.quiet = 1;
722
723 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
724 return ret;
725
726 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
727 if (be16_to_cpu(*feature_code) == CDF_HWDM)
728 return 0;
729
730 return 1;
731}
732
733
734static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
735{
736 struct rwrt_feature_desc rfd;
737 int ret;
738
739 *write = 0;
740
741 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
742 return ret;
743
744 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
745 *write = 1;
746
747 return 0;
748}
749
750static int cdrom_media_erasable(struct cdrom_device_info *cdi)
751{
752 disc_information di;
753 int ret;
754
755 ret = cdrom_get_disc_info(cdi, &di);
756 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
757 return -1;
758
759 return di.erasable;
760}
761
762/*
763 * FIXME: check RO bit
764 */
765static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
766{
767 int ret = cdrom_media_erasable(cdi);
768
769 /*
770 * allow writable open if media info read worked and media is
771 * erasable, _or_ if it fails since not all drives support it
772 */
773 if (!ret)
774 return 1;
775
776 return 0;
777}
778
779static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
780{
781 disc_information di;
782 int ret;
783
784 /*
785 * always reset to DMA lba space on open
786 */
787 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
788 pr_err("failed setting lba address space\n");
789 return 1;
790 }
791
792 ret = cdrom_get_disc_info(cdi, &di);
793 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
794 return 1;
795
796 if (!di.erasable)
797 return 1;
798
799 /*
800 * mrw_status
801 * 0 - not MRW formatted
802 * 1 - MRW bgformat started, but not running or complete
803 * 2 - MRW bgformat in progress
804 * 3 - MRW formatting complete
805 */
806 ret = 0;
807 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
808 if (!di.mrw_status)
809 ret = 1;
810 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
811 mrw_format_restart)
812 ret = cdrom_mrw_bgformat(cdi, 1);
813
814 return ret;
815}
816
817static int mo_open_write(struct cdrom_device_info *cdi)
818{
819 struct packet_command cgc;
820 char buffer[255];
821 int ret;
822
823 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
824 cgc.quiet = 1;
825
826 /*
827 * obtain write protect information as per
828 * drivers/scsi/sd.c:sd_read_write_protect_flag
829 */
830
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
832 if (ret)
833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
834 if (ret) {
835 cgc.buflen = 255;
836 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
837 }
838
839 /* drive gave us no info, let the user go ahead */
840 if (ret)
841 return 0;
842
843 return buffer[3] & 0x80;
844}
845
846static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
847{
848 struct rwrt_feature_desc rfd;
849 int ret;
850
851 if ((ret = cdrom_has_defect_mgt(cdi)))
852 return ret;
853
854 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
855 return ret;
856 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
857 ret = !rfd.curr;
858
859 cd_dbg(CD_OPEN, "can open for random write\n");
860 return ret;
861}
862
863static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
864{
865 struct packet_command cgc;
866 char buffer[32];
867 int mmc3_profile;
868
869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
870
871 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
872 cgc.cmd[1] = 0;
873 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
874 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
875 cgc.quiet = 1;
876
877 if (cdi->ops->generic_packet(cdi, &cgc))
878 mmc3_profile = 0xffff;
879 else
880 mmc3_profile = (buffer[6] << 8) | buffer[7];
881
882 cdi->mmc3_profile = mmc3_profile;
883}
884
885static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
886{
887 switch (cdi->mmc3_profile) {
888 case 0x12: /* DVD-RAM */
889 case 0x1A: /* DVD+RW */
890 case 0x43: /* BD-RE */
891 return 0;
892 default:
893 return 1;
894 }
895}
896
897/*
898 * returns 0 for ok to open write, non-0 to disallow
899 */
900static int cdrom_open_write(struct cdrom_device_info *cdi)
901{
902 int mrw, mrw_write, ram_write;
903 int ret = 1;
904
905 mrw = 0;
906 if (!cdrom_is_mrw(cdi, &mrw_write))
907 mrw = 1;
908
909 if (CDROM_CAN(CDC_MO_DRIVE))
910 ram_write = 1;
911 else
912 (void) cdrom_is_random_writable(cdi, &ram_write);
913
914 if (mrw)
915 cdi->mask &= ~CDC_MRW;
916 else
917 cdi->mask |= CDC_MRW;
918
919 if (mrw_write)
920 cdi->mask &= ~CDC_MRW_W;
921 else
922 cdi->mask |= CDC_MRW_W;
923
924 if (ram_write)
925 cdi->mask &= ~CDC_RAM;
926 else
927 cdi->mask |= CDC_RAM;
928
929 if (CDROM_CAN(CDC_MRW_W))
930 ret = cdrom_mrw_open_write(cdi);
931 else if (CDROM_CAN(CDC_DVD_RAM))
932 ret = cdrom_dvdram_open_write(cdi);
933 else if (CDROM_CAN(CDC_RAM) &&
934 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
935 ret = cdrom_ram_open_write(cdi);
936 else if (CDROM_CAN(CDC_MO_DRIVE))
937 ret = mo_open_write(cdi);
938 else if (!cdrom_is_dvd_rw(cdi))
939 ret = 0;
940
941 return ret;
942}
943
944static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
945{
946 struct packet_command cgc;
947
948 if (cdi->mmc3_profile != 0x1a) {
949 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
950 return;
951 }
952
953 if (!cdi->media_written) {
954 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
955 return;
956 }
957
958 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
959
960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
961 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
962 cgc.timeout = 30*HZ;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.timeout = 3000*HZ;
968 cgc.quiet = 1;
969 cdi->ops->generic_packet(cdi, &cgc);
970
971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
972 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
973 cgc.cmd[2] = 2; /* Close session */
974 cgc.quiet = 1;
975 cgc.timeout = 3000*HZ;
976 cdi->ops->generic_packet(cdi, &cgc);
977
978 cdi->media_written = 0;
979}
980
981static int cdrom_close_write(struct cdrom_device_info *cdi)
982{
983#if 0
984 return cdrom_flush_cache(cdi);
985#else
986 return 0;
987#endif
988}
989
990/* badly broken, I know. Is due for a fixup anytime. */
991static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
992{
993 struct cdrom_tochdr header;
994 struct cdrom_tocentry entry;
995 int ret, i;
996 tracks->data = 0;
997 tracks->audio = 0;
998 tracks->cdi = 0;
999 tracks->xa = 0;
1000 tracks->error = 0;
1001 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1002
1003 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007
1008 /* Grab the TOC header so we can see how many tracks there are */
1009 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1010 if (ret) {
1011 if (ret == -ENOMEDIUM)
1012 tracks->error = CDS_NO_DISC;
1013 else
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 /* check what type of tracks are on this disc */
1018 entry.cdte_format = CDROM_MSF;
1019 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1020 entry.cdte_track = i;
1021 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1022 tracks->error = CDS_NO_INFO;
1023 return;
1024 }
1025 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1026 if (entry.cdte_format == 0x10)
1027 tracks->cdi++;
1028 else if (entry.cdte_format == 0x20)
1029 tracks->xa++;
1030 else
1031 tracks->data++;
1032 } else {
1033 tracks->audio++;
1034 }
1035 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1036 i, entry.cdte_format, entry.cdte_ctrl);
1037 }
1038 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1039 header.cdth_trk1, tracks->audio, tracks->data,
1040 tracks->cdi, tracks->xa);
1041}
1042
1043static
1044int open_for_data(struct cdrom_device_info *cdi)
1045{
1046 int ret;
1047 const struct cdrom_device_ops *cdo = cdi->ops;
1048 tracktype tracks;
1049 cd_dbg(CD_OPEN, "entering open_for_data\n");
1050 /* Check if the driver can report drive status. If it can, we
1051 can do clever things. If it can't, well, we at least tried! */
1052 if (cdo->drive_status != NULL) {
1053 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1054 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1055 if (ret == CDS_TRAY_OPEN) {
1056 cd_dbg(CD_OPEN, "the tray is open...\n");
1057 /* can/may i close it? */
1058 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1059 cdi->options & CDO_AUTO_CLOSE) {
1060 cd_dbg(CD_OPEN, "trying to close the tray\n");
1061 ret=cdo->tray_move(cdi,0);
1062 if (ret) {
1063 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1064 /* Ignore the error from the low
1065 level driver. We don't care why it
1066 couldn't close the tray. We only care
1067 that there is no disc in the drive,
1068 since that is the _REAL_ problem here.*/
1069 ret=-ENOMEDIUM;
1070 goto clean_up_and_return;
1071 }
1072 } else {
1073 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 /* Ok, the door should be closed now.. Check again */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1080 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1081 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1082 ret=-ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 cd_dbg(CD_OPEN, "the tray is now closed\n");
1086 }
1087 /* the door should be closed now, check for the disc */
1088 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1089 if (ret!=CDS_DISC_OK) {
1090 ret = -ENOMEDIUM;
1091 goto clean_up_and_return;
1092 }
1093 }
1094 cdrom_count_tracks(cdi, &tracks);
1095 if (tracks.error == CDS_NO_DISC) {
1096 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1097 ret=-ENOMEDIUM;
1098 goto clean_up_and_return;
1099 }
1100 /* CD-Players which don't use O_NONBLOCK, workman
1101 * for example, need bit CDO_CHECK_TYPE cleared! */
1102 if (tracks.data==0) {
1103 if (cdi->options & CDO_CHECK_TYPE) {
1104 /* give people a warning shot, now that CDO_CHECK_TYPE
1105 is the default case! */
1106 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1107 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1108 (unsigned int)task_pid_nr(current));
1109 ret=-EMEDIUMTYPE;
1110 goto clean_up_and_return;
1111 }
1112 else {
1113 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1114 }
1115 }
1116
1117 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1118
1119 /* all seems well, we can open the device */
1120 ret = cdo->open(cdi, 0); /* open for data */
1121 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1122 /* After all this careful checking, we shouldn't have problems
1123 opening the device, but we don't want the device locked if
1124 this somehow fails... */
1125 if (ret) {
1126 cd_dbg(CD_OPEN, "open device failed\n");
1127 goto clean_up_and_return;
1128 }
1129 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1130 cdo->lock_door(cdi, 1);
1131 cd_dbg(CD_OPEN, "door locked\n");
1132 }
1133 cd_dbg(CD_OPEN, "device opened successfully\n");
1134 return ret;
1135
1136 /* Something failed. Try to unlock the drive, because some drivers
1137 (notably ide-cd) lock the drive after every command. This produced
1138 a nasty bug where after mount failed, the drive would remain locked!
1139 This ensures that the drive gets unlocked after a mount fails. This
1140 is a goto to avoid bloating the driver with redundant code. */
1141clean_up_and_return:
1142 cd_dbg(CD_OPEN, "open failed\n");
1143 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1144 cdo->lock_door(cdi, 0);
1145 cd_dbg(CD_OPEN, "door unlocked\n");
1146 }
1147 return ret;
1148}
1149
1150/* We use the open-option O_NONBLOCK to indicate that the
1151 * purpose of opening is only for subsequent ioctl() calls; no device
1152 * integrity checks are performed.
1153 *
1154 * We hope that all cd-player programs will adopt this convention. It
1155 * is in their own interest: device control becomes a lot easier
1156 * this way.
1157 */
1158int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1159 fmode_t mode)
1160{
1161 int ret;
1162
1163 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1164
1165 /* if this was a O_NONBLOCK open and we should honor the flags,
1166 * do a quick open without drive/disc integrity checks. */
1167 cdi->use_count++;
1168 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1169 ret = cdi->ops->open(cdi, 1);
1170 } else {
1171 ret = open_for_data(cdi);
1172 if (ret)
1173 goto err;
1174 if (CDROM_CAN(CDC_GENERIC_PACKET))
1175 cdrom_mmc3_profile(cdi);
1176 if (mode & FMODE_WRITE) {
1177 ret = -EROFS;
1178 if (cdrom_open_write(cdi))
1179 goto err_release;
1180 if (!CDROM_CAN(CDC_RAM))
1181 goto err_release;
1182 ret = 0;
1183 cdi->media_written = 0;
1184 }
1185 }
1186
1187 if (ret)
1188 goto err;
1189
1190 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1191 cdi->name, cdi->use_count);
1192 return 0;
1193err_release:
1194 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1195 cdi->ops->lock_door(cdi, 0);
1196 cd_dbg(CD_OPEN, "door unlocked\n");
1197 }
1198 cdi->ops->release(cdi);
1199err:
1200 cdi->use_count--;
1201 return ret;
1202}
1203EXPORT_SYMBOL(cdrom_open);
1204
1205/* This code is similar to that in open_for_data. The routine is called
1206 whenever an audio play operation is requested.
1207*/
1208static int check_for_audio_disc(struct cdrom_device_info *cdi,
1209 const struct cdrom_device_ops *cdo)
1210{
1211 int ret;
1212 tracktype tracks;
1213 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1214 if (!(cdi->options & CDO_CHECK_TYPE))
1215 return 0;
1216 if (cdo->drive_status != NULL) {
1217 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1218 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1219 if (ret == CDS_TRAY_OPEN) {
1220 cd_dbg(CD_OPEN, "the tray is open...\n");
1221 /* can/may i close it? */
1222 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1223 cdi->options & CDO_AUTO_CLOSE) {
1224 cd_dbg(CD_OPEN, "trying to close the tray\n");
1225 ret=cdo->tray_move(cdi,0);
1226 if (ret) {
1227 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1228 /* Ignore the error from the low
1229 level driver. We don't care why it
1230 couldn't close the tray. We only care
1231 that there is no disc in the drive,
1232 since that is the _REAL_ problem here.*/
1233 return -ENOMEDIUM;
1234 }
1235 } else {
1236 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1237 return -ENOMEDIUM;
1238 }
1239 /* Ok, the door should be closed now.. Check again */
1240 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1241 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1242 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1243 return -ENOMEDIUM;
1244 }
1245 if (ret!=CDS_DISC_OK) {
1246 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1247 return -EIO;
1248 }
1249 cd_dbg(CD_OPEN, "the tray is now closed\n");
1250 }
1251 }
1252 cdrom_count_tracks(cdi, &tracks);
1253 if (tracks.error)
1254 return(tracks.error);
1255
1256 if (tracks.audio==0)
1257 return -EMEDIUMTYPE;
1258
1259 return 0;
1260}
1261
1262void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1263{
1264 const struct cdrom_device_ops *cdo = cdi->ops;
1265 int opened_for_data;
1266
1267 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1268
1269 if (cdi->use_count > 0)
1270 cdi->use_count--;
1271
1272 if (cdi->use_count == 0) {
1273 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1274 cdi->name);
1275 cdrom_dvd_rw_close_write(cdi);
1276
1277 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1278 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1279 cdo->lock_door(cdi, 0);
1280 }
1281 }
1282
1283 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1284 !(mode & FMODE_NDELAY);
1285
1286 /*
1287 * flush cache on last write release
1288 */
1289 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1290 cdrom_close_write(cdi);
1291
1292 cdo->release(cdi);
1293 if (cdi->use_count == 0) { /* last process that closes dev*/
1294 if (opened_for_data &&
1295 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1296 cdo->tray_move(cdi, 1);
1297 }
1298}
1299EXPORT_SYMBOL(cdrom_release);
1300
1301static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1302 struct cdrom_changer_info *buf)
1303{
1304 struct packet_command cgc;
1305 const struct cdrom_device_ops *cdo = cdi->ops;
1306 int length;
1307
1308 /*
1309 * Sanyo changer isn't spec compliant (doesn't use regular change
1310 * LOAD_UNLOAD command, and it doesn't implement the mech status
1311 * command below
1312 */
1313 if (cdi->sanyo_slot) {
1314 buf->hdr.nslots = 3;
1315 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1316 for (length = 0; length < 3; length++) {
1317 buf->slots[length].disc_present = 1;
1318 buf->slots[length].change = 0;
1319 }
1320 return 0;
1321 }
1322
1323 length = sizeof(struct cdrom_mechstat_header) +
1324 cdi->capacity * sizeof(struct cdrom_slot);
1325
1326 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1327 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1328 cgc.cmd[8] = (length >> 8) & 0xff;
1329 cgc.cmd[9] = length & 0xff;
1330 return cdo->generic_packet(cdi, &cgc);
1331}
1332
1333static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1334{
1335 struct cdrom_changer_info *info;
1336 int ret;
1337
1338 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1339 if (cdi->sanyo_slot)
1340 return CDS_NO_INFO;
1341
1342 info = kmalloc(sizeof(*info), GFP_KERNEL);
1343 if (!info)
1344 return -ENOMEM;
1345
1346 if ((ret = cdrom_read_mech_status(cdi, info)))
1347 goto out_free;
1348
1349 if (info->slots[slot].disc_present)
1350 ret = CDS_DISC_OK;
1351 else
1352 ret = CDS_NO_DISC;
1353
1354out_free:
1355 kfree(info);
1356 return ret;
1357}
1358
1359/* Return the number of slots for an ATAPI/SCSI cdrom,
1360 * return 1 if not a changer.
1361 */
1362int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1363{
1364 int nslots = 1;
1365 struct cdrom_changer_info *info;
1366
1367 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1368 /* cdrom_read_mech_status requires a valid value for capacity: */
1369 cdi->capacity = 0;
1370
1371 info = kmalloc(sizeof(*info), GFP_KERNEL);
1372 if (!info)
1373 return -ENOMEM;
1374
1375 if (cdrom_read_mech_status(cdi, info) == 0)
1376 nslots = info->hdr.nslots;
1377
1378 kfree(info);
1379 return nslots;
1380}
1381EXPORT_SYMBOL(cdrom_number_of_slots);
1382
1383
1384/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1385static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1386{
1387 struct packet_command cgc;
1388
1389 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1390 if (cdi->sanyo_slot && slot < 0)
1391 return 0;
1392
1393 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1394 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1395 cgc.cmd[4] = 2 + (slot >= 0);
1396 cgc.cmd[8] = slot;
1397 cgc.timeout = 60 * HZ;
1398
1399 /* The Sanyo 3 CD changer uses byte 7 of the
1400 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1401 using the GPCMD_LOAD_UNLOAD opcode. */
1402 if (cdi->sanyo_slot && -1 < slot) {
1403 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1404 cgc.cmd[7] = slot;
1405 cgc.cmd[4] = cgc.cmd[8] = 0;
1406 cdi->sanyo_slot = slot ? slot : 3;
1407 }
1408
1409 return cdi->ops->generic_packet(cdi, &cgc);
1410}
1411
1412static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1413{
1414 struct cdrom_changer_info *info;
1415 int curslot;
1416 int ret;
1417
1418 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1419 if (!CDROM_CAN(CDC_SELECT_DISC))
1420 return -EDRIVE_CANT_DO_THIS;
1421
1422 if (cdi->ops->check_events)
1423 cdi->ops->check_events(cdi, 0, slot);
1424
1425 if (slot == CDSL_NONE) {
1426 signal_media_change(cdi);
1427 return cdrom_load_unload(cdi, -1);
1428 }
1429
1430 info = kmalloc(sizeof(*info), GFP_KERNEL);
1431 if (!info)
1432 return -ENOMEM;
1433
1434 if ((ret = cdrom_read_mech_status(cdi, info))) {
1435 kfree(info);
1436 return ret;
1437 }
1438
1439 curslot = info->hdr.curslot;
1440 kfree(info);
1441
1442 if (cdi->use_count > 1 || cdi->keeplocked) {
1443 if (slot == CDSL_CURRENT) {
1444 return curslot;
1445 } else {
1446 return -EBUSY;
1447 }
1448 }
1449
1450 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1451 which is useful if it had been previously unloaded.
1452 Whether it can or not, it returns the current slot.
1453 Similarly, if slot happens to be the current one, we still
1454 try and load it. */
1455 if (slot == CDSL_CURRENT)
1456 slot = curslot;
1457
1458 /* set media changed bits on both queues */
1459 signal_media_change(cdi);
1460 if ((ret = cdrom_load_unload(cdi, slot)))
1461 return ret;
1462
1463 return slot;
1464}
1465
1466/*
1467 * As cdrom implements an extra ioctl consumer for media changed
1468 * event, it needs to buffer ->check_events() output, such that event
1469 * is not lost for both the usual VFS and ioctl paths.
1470 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1471 * path.
1472 *
1473 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1474 * called in parallel and buffering fields are accessed without any
1475 * exclusion. The original media_changed code had the same problem.
1476 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1477 * and remove this cruft altogether. It doesn't have much usefulness
1478 * at this point.
1479 */
1480static void cdrom_update_events(struct cdrom_device_info *cdi,
1481 unsigned int clearing)
1482{
1483 unsigned int events;
1484
1485 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1486 cdi->vfs_events |= events;
1487 cdi->ioctl_events |= events;
1488}
1489
1490unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1491 unsigned int clearing)
1492{
1493 unsigned int events;
1494
1495 cdrom_update_events(cdi, clearing);
1496 events = cdi->vfs_events;
1497 cdi->vfs_events = 0;
1498 return events;
1499}
1500EXPORT_SYMBOL(cdrom_check_events);
1501
1502/* We want to make media_changed accessible to the user through an
1503 * ioctl. The main problem now is that we must double-buffer the
1504 * low-level implementation, to assure that the VFS and the user both
1505 * see a medium change once.
1506 */
1507
1508static
1509int media_changed(struct cdrom_device_info *cdi, int queue)
1510{
1511 unsigned int mask = (1 << (queue & 1));
1512 int ret = !!(cdi->mc_flags & mask);
1513 bool changed;
1514
1515 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1516 return ret;
1517
1518 /* changed since last call? */
1519 BUG_ON(!queue); /* shouldn't be called from VFS path */
1520 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1521 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1522 cdi->ioctl_events = 0;
1523
1524 if (changed) {
1525 signal_media_change(cdi);
1526 ret |= 1;
1527 cdi->media_written = 0;
1528 }
1529
1530 cdi->mc_flags &= ~mask; /* clear bit */
1531 return ret;
1532}
1533
1534/* Requests to the low-level drivers will /always/ be done in the
1535 following format convention:
1536
1537 CDROM_LBA: all data-related requests.
1538 CDROM_MSF: all audio-related requests.
1539
1540 However, a low-level implementation is allowed to refuse this
1541 request, and return information in its own favorite format.
1542
1543 It doesn't make sense /at all/ to ask for a play_audio in LBA
1544 format, or ask for multi-session info in MSF format. However, for
1545 backward compatibility these format requests will be satisfied, but
1546 the requests to the low-level drivers will be sanitized in the more
1547 meaningful format indicated above.
1548 */
1549
1550static
1551void sanitize_format(union cdrom_addr *addr,
1552 u_char * curr, u_char requested)
1553{
1554 if (*curr == requested)
1555 return; /* nothing to be done! */
1556 if (requested == CDROM_LBA) {
1557 addr->lba = (int) addr->msf.frame +
1558 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1559 } else { /* CDROM_MSF */
1560 int lba = addr->lba;
1561 addr->msf.frame = lba % 75;
1562 lba /= 75;
1563 lba += 2;
1564 addr->msf.second = lba % 60;
1565 addr->msf.minute = lba / 60;
1566 }
1567 *curr = requested;
1568}
1569
1570void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1571 int type)
1572{
1573 memset(cgc, 0, sizeof(struct packet_command));
1574 if (buf)
1575 memset(buf, 0, len);
1576 cgc->buffer = (char *) buf;
1577 cgc->buflen = len;
1578 cgc->data_direction = type;
1579 cgc->timeout = CDROM_DEF_TIMEOUT;
1580}
1581EXPORT_SYMBOL(init_cdrom_command);
1582
1583/* DVD handling */
1584
1585#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1586#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1587
1588static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1589{
1590 cgc->cmd[0] = GPCMD_REPORT_KEY;
1591 cgc->cmd[10] = type | (agid << 6);
1592 switch (type) {
1593 case 0: case 8: case 5: {
1594 cgc->buflen = 8;
1595 break;
1596 }
1597 case 1: {
1598 cgc->buflen = 16;
1599 break;
1600 }
1601 case 2: case 4: {
1602 cgc->buflen = 12;
1603 break;
1604 }
1605 }
1606 cgc->cmd[9] = cgc->buflen;
1607 cgc->data_direction = CGC_DATA_READ;
1608}
1609
1610static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1611{
1612 cgc->cmd[0] = GPCMD_SEND_KEY;
1613 cgc->cmd[10] = type | (agid << 6);
1614 switch (type) {
1615 case 1: {
1616 cgc->buflen = 16;
1617 break;
1618 }
1619 case 3: {
1620 cgc->buflen = 12;
1621 break;
1622 }
1623 case 6: {
1624 cgc->buflen = 8;
1625 break;
1626 }
1627 }
1628 cgc->cmd[9] = cgc->buflen;
1629 cgc->data_direction = CGC_DATA_WRITE;
1630}
1631
1632static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1633{
1634 int ret;
1635 u_char buf[20];
1636 struct packet_command cgc;
1637 const struct cdrom_device_ops *cdo = cdi->ops;
1638 rpc_state_t rpc_state;
1639
1640 memset(buf, 0, sizeof(buf));
1641 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1642
1643 switch (ai->type) {
1644 /* LU data send */
1645 case DVD_LU_SEND_AGID:
1646 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1647 cgc.quiet = 1;
1648 setup_report_key(&cgc, ai->lsa.agid, 0);
1649
1650 if ((ret = cdo->generic_packet(cdi, &cgc)))
1651 return ret;
1652
1653 ai->lsa.agid = buf[7] >> 6;
1654 /* Returning data, let host change state */
1655 break;
1656
1657 case DVD_LU_SEND_KEY1:
1658 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1659 setup_report_key(&cgc, ai->lsk.agid, 2);
1660
1661 if ((ret = cdo->generic_packet(cdi, &cgc)))
1662 return ret;
1663
1664 copy_key(ai->lsk.key, &buf[4]);
1665 /* Returning data, let host change state */
1666 break;
1667
1668 case DVD_LU_SEND_CHALLENGE:
1669 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1670 setup_report_key(&cgc, ai->lsc.agid, 1);
1671
1672 if ((ret = cdo->generic_packet(cdi, &cgc)))
1673 return ret;
1674
1675 copy_chal(ai->lsc.chal, &buf[4]);
1676 /* Returning data, let host change state */
1677 break;
1678
1679 /* Post-auth key */
1680 case DVD_LU_SEND_TITLE_KEY:
1681 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1682 cgc.quiet = 1;
1683 setup_report_key(&cgc, ai->lstk.agid, 4);
1684 cgc.cmd[5] = ai->lstk.lba;
1685 cgc.cmd[4] = ai->lstk.lba >> 8;
1686 cgc.cmd[3] = ai->lstk.lba >> 16;
1687 cgc.cmd[2] = ai->lstk.lba >> 24;
1688
1689 if ((ret = cdo->generic_packet(cdi, &cgc)))
1690 return ret;
1691
1692 ai->lstk.cpm = (buf[4] >> 7) & 1;
1693 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1694 ai->lstk.cgms = (buf[4] >> 4) & 3;
1695 copy_key(ai->lstk.title_key, &buf[5]);
1696 /* Returning data, let host change state */
1697 break;
1698
1699 case DVD_LU_SEND_ASF:
1700 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1701 setup_report_key(&cgc, ai->lsasf.agid, 5);
1702
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
1704 return ret;
1705
1706 ai->lsasf.asf = buf[7] & 1;
1707 break;
1708
1709 /* LU data receive (LU changes state) */
1710 case DVD_HOST_SEND_CHALLENGE:
1711 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1712 setup_send_key(&cgc, ai->hsc.agid, 1);
1713 buf[1] = 0xe;
1714 copy_chal(&buf[4], ai->hsc.chal);
1715
1716 if ((ret = cdo->generic_packet(cdi, &cgc)))
1717 return ret;
1718
1719 ai->type = DVD_LU_SEND_KEY1;
1720 break;
1721
1722 case DVD_HOST_SEND_KEY2:
1723 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1724 setup_send_key(&cgc, ai->hsk.agid, 3);
1725 buf[1] = 0xa;
1726 copy_key(&buf[4], ai->hsk.key);
1727
1728 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1729 ai->type = DVD_AUTH_FAILURE;
1730 return ret;
1731 }
1732 ai->type = DVD_AUTH_ESTABLISHED;
1733 break;
1734
1735 /* Misc */
1736 case DVD_INVALIDATE_AGID:
1737 cgc.quiet = 1;
1738 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1739 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1740 if ((ret = cdo->generic_packet(cdi, &cgc)))
1741 return ret;
1742 break;
1743
1744 /* Get region settings */
1745 case DVD_LU_SEND_RPC_STATE:
1746 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1747 setup_report_key(&cgc, 0, 8);
1748 memset(&rpc_state, 0, sizeof(rpc_state_t));
1749 cgc.buffer = (char *) &rpc_state;
1750
1751 if ((ret = cdo->generic_packet(cdi, &cgc)))
1752 return ret;
1753
1754 ai->lrpcs.type = rpc_state.type_code;
1755 ai->lrpcs.vra = rpc_state.vra;
1756 ai->lrpcs.ucca = rpc_state.ucca;
1757 ai->lrpcs.region_mask = rpc_state.region_mask;
1758 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1759 break;
1760
1761 /* Set region settings */
1762 case DVD_HOST_SEND_RPC_STATE:
1763 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1764 setup_send_key(&cgc, 0, 6);
1765 buf[1] = 6;
1766 buf[4] = ai->hrpcs.pdrc;
1767
1768 if ((ret = cdo->generic_packet(cdi, &cgc)))
1769 return ret;
1770 break;
1771
1772 default:
1773 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1774 return -ENOTTY;
1775 }
1776
1777 return 0;
1778}
1779
1780static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1781 struct packet_command *cgc)
1782{
1783 unsigned char buf[21], *base;
1784 struct dvd_layer *layer;
1785 const struct cdrom_device_ops *cdo = cdi->ops;
1786 int ret, layer_num = s->physical.layer_num;
1787
1788 if (layer_num >= DVD_LAYERS)
1789 return -EINVAL;
1790
1791 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1792 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1793 cgc->cmd[6] = layer_num;
1794 cgc->cmd[7] = s->type;
1795 cgc->cmd[9] = cgc->buflen & 0xff;
1796
1797 /*
1798 * refrain from reporting errors on non-existing layers (mainly)
1799 */
1800 cgc->quiet = 1;
1801
1802 ret = cdo->generic_packet(cdi, cgc);
1803 if (ret)
1804 return ret;
1805
1806 base = &buf[4];
1807 layer = &s->physical.layer[layer_num];
1808
1809 /*
1810 * place the data... really ugly, but at least we won't have to
1811 * worry about endianess in userspace.
1812 */
1813 memset(layer, 0, sizeof(*layer));
1814 layer->book_version = base[0] & 0xf;
1815 layer->book_type = base[0] >> 4;
1816 layer->min_rate = base[1] & 0xf;
1817 layer->disc_size = base[1] >> 4;
1818 layer->layer_type = base[2] & 0xf;
1819 layer->track_path = (base[2] >> 4) & 1;
1820 layer->nlayers = (base[2] >> 5) & 3;
1821 layer->track_density = base[3] & 0xf;
1822 layer->linear_density = base[3] >> 4;
1823 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1824 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1825 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1826 layer->bca = base[16] >> 7;
1827
1828 return 0;
1829}
1830
1831static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1832 struct packet_command *cgc)
1833{
1834 int ret;
1835 u_char buf[8];
1836 const struct cdrom_device_ops *cdo = cdi->ops;
1837
1838 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1839 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1840 cgc->cmd[6] = s->copyright.layer_num;
1841 cgc->cmd[7] = s->type;
1842 cgc->cmd[8] = cgc->buflen >> 8;
1843 cgc->cmd[9] = cgc->buflen & 0xff;
1844
1845 ret = cdo->generic_packet(cdi, cgc);
1846 if (ret)
1847 return ret;
1848
1849 s->copyright.cpst = buf[4];
1850 s->copyright.rmi = buf[5];
1851
1852 return 0;
1853}
1854
1855static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1856 struct packet_command *cgc)
1857{
1858 int ret, size;
1859 u_char *buf;
1860 const struct cdrom_device_ops *cdo = cdi->ops;
1861
1862 size = sizeof(s->disckey.value) + 4;
1863
1864 buf = kmalloc(size, GFP_KERNEL);
1865 if (!buf)
1866 return -ENOMEM;
1867
1868 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1869 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1870 cgc->cmd[7] = s->type;
1871 cgc->cmd[8] = size >> 8;
1872 cgc->cmd[9] = size & 0xff;
1873 cgc->cmd[10] = s->disckey.agid << 6;
1874
1875 ret = cdo->generic_packet(cdi, cgc);
1876 if (!ret)
1877 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1878
1879 kfree(buf);
1880 return ret;
1881}
1882
1883static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1884 struct packet_command *cgc)
1885{
1886 int ret, size = 4 + 188;
1887 u_char *buf;
1888 const struct cdrom_device_ops *cdo = cdi->ops;
1889
1890 buf = kmalloc(size, GFP_KERNEL);
1891 if (!buf)
1892 return -ENOMEM;
1893
1894 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1895 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1896 cgc->cmd[7] = s->type;
1897 cgc->cmd[9] = cgc->buflen & 0xff;
1898
1899 ret = cdo->generic_packet(cdi, cgc);
1900 if (ret)
1901 goto out;
1902
1903 s->bca.len = buf[0] << 8 | buf[1];
1904 if (s->bca.len < 12 || s->bca.len > 188) {
1905 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1906 s->bca.len);
1907 ret = -EIO;
1908 goto out;
1909 }
1910 memcpy(s->bca.value, &buf[4], s->bca.len);
1911 ret = 0;
1912out:
1913 kfree(buf);
1914 return ret;
1915}
1916
1917static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1918 struct packet_command *cgc)
1919{
1920 int ret = 0, size;
1921 u_char *buf;
1922 const struct cdrom_device_ops *cdo = cdi->ops;
1923
1924 size = sizeof(s->manufact.value) + 4;
1925
1926 buf = kmalloc(size, GFP_KERNEL);
1927 if (!buf)
1928 return -ENOMEM;
1929
1930 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1931 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1932 cgc->cmd[7] = s->type;
1933 cgc->cmd[8] = size >> 8;
1934 cgc->cmd[9] = size & 0xff;
1935
1936 ret = cdo->generic_packet(cdi, cgc);
1937 if (ret)
1938 goto out;
1939
1940 s->manufact.len = buf[0] << 8 | buf[1];
1941 if (s->manufact.len < 0) {
1942 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1943 s->manufact.len);
1944 ret = -EIO;
1945 } else {
1946 if (s->manufact.len > 2048) {
1947 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1948 s->manufact.len);
1949 s->manufact.len = 2048;
1950 }
1951 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1952 }
1953
1954out:
1955 kfree(buf);
1956 return ret;
1957}
1958
1959static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1960 struct packet_command *cgc)
1961{
1962 switch (s->type) {
1963 case DVD_STRUCT_PHYSICAL:
1964 return dvd_read_physical(cdi, s, cgc);
1965
1966 case DVD_STRUCT_COPYRIGHT:
1967 return dvd_read_copyright(cdi, s, cgc);
1968
1969 case DVD_STRUCT_DISCKEY:
1970 return dvd_read_disckey(cdi, s, cgc);
1971
1972 case DVD_STRUCT_BCA:
1973 return dvd_read_bca(cdi, s, cgc);
1974
1975 case DVD_STRUCT_MANUFACT:
1976 return dvd_read_manufact(cdi, s, cgc);
1977
1978 default:
1979 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1980 s->type);
1981 return -EINVAL;
1982 }
1983}
1984
1985int cdrom_mode_sense(struct cdrom_device_info *cdi,
1986 struct packet_command *cgc,
1987 int page_code, int page_control)
1988{
1989 const struct cdrom_device_ops *cdo = cdi->ops;
1990
1991 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1992
1993 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1994 cgc->cmd[2] = page_code | (page_control << 6);
1995 cgc->cmd[7] = cgc->buflen >> 8;
1996 cgc->cmd[8] = cgc->buflen & 0xff;
1997 cgc->data_direction = CGC_DATA_READ;
1998 return cdo->generic_packet(cdi, cgc);
1999}
2000EXPORT_SYMBOL(cdrom_mode_sense);
2001
2002int cdrom_mode_select(struct cdrom_device_info *cdi,
2003 struct packet_command *cgc)
2004{
2005 const struct cdrom_device_ops *cdo = cdi->ops;
2006
2007 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2008 memset(cgc->buffer, 0, 2);
2009 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2010 cgc->cmd[1] = 0x10; /* PF */
2011 cgc->cmd[7] = cgc->buflen >> 8;
2012 cgc->cmd[8] = cgc->buflen & 0xff;
2013 cgc->data_direction = CGC_DATA_WRITE;
2014 return cdo->generic_packet(cdi, cgc);
2015}
2016EXPORT_SYMBOL(cdrom_mode_select);
2017
2018static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2019 struct cdrom_subchnl *subchnl, int mcn)
2020{
2021 const struct cdrom_device_ops *cdo = cdi->ops;
2022 struct packet_command cgc;
2023 char buffer[32];
2024 int ret;
2025
2026 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2027 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2028 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2029 cgc.cmd[2] = 0x40; /* request subQ data */
2030 cgc.cmd[3] = mcn ? 2 : 1;
2031 cgc.cmd[8] = 16;
2032
2033 if ((ret = cdo->generic_packet(cdi, &cgc)))
2034 return ret;
2035
2036 subchnl->cdsc_audiostatus = cgc.buffer[1];
2037 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2038 subchnl->cdsc_trk = cgc.buffer[6];
2039 subchnl->cdsc_ind = cgc.buffer[7];
2040
2041 if (subchnl->cdsc_format == CDROM_LBA) {
2042 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2043 (cgc.buffer[9] << 16) |
2044 (cgc.buffer[10] << 8) |
2045 (cgc.buffer[11]));
2046 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2047 (cgc.buffer[13] << 16) |
2048 (cgc.buffer[14] << 8) |
2049 (cgc.buffer[15]));
2050 } else {
2051 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2052 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2053 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2054 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2055 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2056 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2057 }
2058
2059 return 0;
2060}
2061
2062/*
2063 * Specific READ_10 interface
2064 */
2065static int cdrom_read_cd(struct cdrom_device_info *cdi,
2066 struct packet_command *cgc, int lba,
2067 int blocksize, int nblocks)
2068{
2069 const struct cdrom_device_ops *cdo = cdi->ops;
2070
2071 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2072 cgc->cmd[0] = GPCMD_READ_10;
2073 cgc->cmd[2] = (lba >> 24) & 0xff;
2074 cgc->cmd[3] = (lba >> 16) & 0xff;
2075 cgc->cmd[4] = (lba >> 8) & 0xff;
2076 cgc->cmd[5] = lba & 0xff;
2077 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2078 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2079 cgc->cmd[8] = nblocks & 0xff;
2080 cgc->buflen = blocksize * nblocks;
2081 return cdo->generic_packet(cdi, cgc);
2082}
2083
2084/* very generic interface for reading the various types of blocks */
2085static int cdrom_read_block(struct cdrom_device_info *cdi,
2086 struct packet_command *cgc,
2087 int lba, int nblocks, int format, int blksize)
2088{
2089 const struct cdrom_device_ops *cdo = cdi->ops;
2090
2091 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2092 cgc->cmd[0] = GPCMD_READ_CD;
2093 /* expected sector size - cdda,mode1,etc. */
2094 cgc->cmd[1] = format << 2;
2095 /* starting address */
2096 cgc->cmd[2] = (lba >> 24) & 0xff;
2097 cgc->cmd[3] = (lba >> 16) & 0xff;
2098 cgc->cmd[4] = (lba >> 8) & 0xff;
2099 cgc->cmd[5] = lba & 0xff;
2100 /* number of blocks */
2101 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2102 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2103 cgc->cmd[8] = nblocks & 0xff;
2104 cgc->buflen = blksize * nblocks;
2105
2106 /* set the header info returned */
2107 switch (blksize) {
2108 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2109 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2110 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2111 default : cgc->cmd[9] = 0x10;
2112 }
2113
2114 return cdo->generic_packet(cdi, cgc);
2115}
2116
2117static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2118 int lba, int nframes)
2119{
2120 struct packet_command cgc;
2121 int ret = 0;
2122 int nr;
2123
2124 cdi->last_sense = 0;
2125
2126 memset(&cgc, 0, sizeof(cgc));
2127
2128 /*
2129 * start with will ra.nframes size, back down if alloc fails
2130 */
2131 nr = nframes;
2132 do {
2133 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2134 if (cgc.buffer)
2135 break;
2136
2137 nr >>= 1;
2138 } while (nr);
2139
2140 if (!nr)
2141 return -ENOMEM;
2142
2143 cgc.data_direction = CGC_DATA_READ;
2144 while (nframes > 0) {
2145 if (nr > nframes)
2146 nr = nframes;
2147
2148 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2149 if (ret)
2150 break;
2151 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2152 ret = -EFAULT;
2153 break;
2154 }
2155 ubuf += CD_FRAMESIZE_RAW * nr;
2156 nframes -= nr;
2157 lba += nr;
2158 }
2159 kfree(cgc.buffer);
2160 return ret;
2161}
2162
2163static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2164 int lba, int nframes)
2165{
2166 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
2167 CD_FRAMESIZE_RAW;
2168 int nr, ret = 0;
2169
2170 cdi->last_sense = 0;
2171
2172 while (nframes) {
2173 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2174 nr = 1;
2175 else
2176 nr = min(nframes, max_frames);
2177
2178 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
2179 &cdi->last_sense);
2180 if (ret)
2181 break;
2182
2183 nframes -= nr;
2184 lba += nr;
2185 ubuf += (nr * CD_FRAMESIZE_RAW);
2186 }
2187
2188 return ret;
2189}
2190
2191static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2192 int lba, int nframes)
2193{
2194 int ret;
2195
2196 if (cdi->cdda_method == CDDA_OLD)
2197 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2198
2199retry:
2200 /*
2201 * for anything else than success and io error, we need to retry
2202 */
2203 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2204 if (!ret || ret != -EIO)
2205 return ret;
2206
2207 /*
2208 * I've seen drives get sense 4/8/3 udma crc errors on multi
2209 * frame dma, so drop to single frame dma if we need to
2210 */
2211 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2212 pr_info("dropping to single frame dma\n");
2213 cdi->cdda_method = CDDA_BPC_SINGLE;
2214 goto retry;
2215 }
2216
2217 /*
2218 * so we have an io error of some sort with multi frame dma. if the
2219 * condition wasn't a hardware error
2220 * problems, not for any error
2221 */
2222 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2223 return ret;
2224
2225 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2226 cdi->cdda_method = CDDA_OLD;
2227 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2228}
2229
2230int cdrom_multisession(struct cdrom_device_info *cdi,
2231 struct cdrom_multisession *info)
2232{
2233 u8 requested_format;
2234 int ret;
2235
2236 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2237 return -ENOSYS;
2238
2239 requested_format = info->addr_format;
2240 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2241 return -EINVAL;
2242 info->addr_format = CDROM_LBA;
2243
2244 ret = cdi->ops->get_last_session(cdi, info);
2245 if (!ret)
2246 sanitize_format(&info->addr, &info->addr_format,
2247 requested_format);
2248 return ret;
2249}
2250EXPORT_SYMBOL_GPL(cdrom_multisession);
2251
2252static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2253 void __user *argp)
2254{
2255 struct cdrom_multisession info;
2256 int ret;
2257
2258 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2259
2260 if (copy_from_user(&info, argp, sizeof(info)))
2261 return -EFAULT;
2262 ret = cdrom_multisession(cdi, &info);
2263 if (ret)
2264 return ret;
2265 if (copy_to_user(argp, &info, sizeof(info)))
2266 return -EFAULT;
2267
2268 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2269 return ret;
2270}
2271
2272static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2273{
2274 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2275
2276 if (!CDROM_CAN(CDC_OPEN_TRAY))
2277 return -ENOSYS;
2278 if (cdi->use_count != 1 || cdi->keeplocked)
2279 return -EBUSY;
2280 if (CDROM_CAN(CDC_LOCK)) {
2281 int ret = cdi->ops->lock_door(cdi, 0);
2282 if (ret)
2283 return ret;
2284 }
2285
2286 return cdi->ops->tray_move(cdi, 1);
2287}
2288
2289static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2290{
2291 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2292
2293 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2294 return -ENOSYS;
2295 return cdi->ops->tray_move(cdi, 0);
2296}
2297
2298static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2299 unsigned long arg)
2300{
2301 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2302
2303 if (!CDROM_CAN(CDC_OPEN_TRAY))
2304 return -ENOSYS;
2305 if (cdi->keeplocked)
2306 return -EBUSY;
2307
2308 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2309 if (arg)
2310 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2311 return 0;
2312}
2313
2314static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2315 unsigned long arg)
2316{
2317 struct cdrom_changer_info *info;
2318 int ret;
2319
2320 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2321
2322 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2323 return -ENOSYS;
2324
2325 /* cannot select disc or select current disc */
2326 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2327 return media_changed(cdi, 1);
2328
2329 if (arg >= cdi->capacity)
2330 return -EINVAL;
2331
2332 info = kmalloc(sizeof(*info), GFP_KERNEL);
2333 if (!info)
2334 return -ENOMEM;
2335
2336 ret = cdrom_read_mech_status(cdi, info);
2337 if (!ret)
2338 ret = info->slots[arg].change;
2339 kfree(info);
2340 return ret;
2341}
2342
2343/*
2344 * Media change detection with timing information.
2345 *
2346 * arg is a pointer to a cdrom_timed_media_change_info struct.
2347 * arg->last_media_change may be set by calling code to signal
2348 * the timestamp (in ms) of the last known media change (by the caller).
2349 * Upon successful return, ioctl call will set arg->last_media_change
2350 * to the latest media change timestamp known by the kernel/driver
2351 * and set arg->has_changed to 1 if that timestamp is more recent
2352 * than the timestamp set by the caller.
2353 */
2354static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
2355 unsigned long arg)
2356{
2357 int ret;
2358 struct cdrom_timed_media_change_info __user *info;
2359 struct cdrom_timed_media_change_info tmp_info;
2360
2361 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2362 return -ENOSYS;
2363
2364 info = (struct cdrom_timed_media_change_info __user *)arg;
2365 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n");
2366
2367 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT);
2368 if (ret < 0)
2369 return ret;
2370
2371 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0)
2372 return -EFAULT;
2373
2374 tmp_info.media_flags = 0;
2375 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
2376 tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
2377
2378 tmp_info.last_media_change = cdi->last_media_change_ms;
2379
2380 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0)
2381 return -EFAULT;
2382
2383 return 0;
2384}
2385
2386static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2387 unsigned long arg)
2388{
2389 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2390
2391 /*
2392 * Options need to be in sync with capability.
2393 * Too late for that, so we have to check each one separately.
2394 */
2395 switch (arg) {
2396 case CDO_USE_FFLAGS:
2397 case CDO_CHECK_TYPE:
2398 break;
2399 case CDO_LOCK:
2400 if (!CDROM_CAN(CDC_LOCK))
2401 return -ENOSYS;
2402 break;
2403 case 0:
2404 return cdi->options;
2405 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2406 default:
2407 if (!CDROM_CAN(arg))
2408 return -ENOSYS;
2409 }
2410 cdi->options |= (int) arg;
2411 return cdi->options;
2412}
2413
2414static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2415 unsigned long arg)
2416{
2417 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2418
2419 cdi->options &= ~(int) arg;
2420 return cdi->options;
2421}
2422
2423static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2424 unsigned long arg)
2425{
2426 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2427
2428 if (!CDROM_CAN(CDC_SELECT_SPEED))
2429 return -ENOSYS;
2430 return cdi->ops->select_speed(cdi, arg);
2431}
2432
2433static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2434 unsigned long arg)
2435{
2436 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2437
2438 if (!CDROM_CAN(CDC_SELECT_DISC))
2439 return -ENOSYS;
2440
2441 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2442 if (arg >= cdi->capacity)
2443 return -EINVAL;
2444 }
2445
2446 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2447 return cdrom_select_disc(cdi, arg);
2448}
2449
2450static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2451 struct block_device *bdev)
2452{
2453 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2454
2455 if (!capable(CAP_SYS_ADMIN))
2456 return -EACCES;
2457 if (!CDROM_CAN(CDC_RESET))
2458 return -ENOSYS;
2459 invalidate_bdev(bdev);
2460 return cdi->ops->reset(cdi);
2461}
2462
2463static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2464 unsigned long arg)
2465{
2466 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2467
2468 if (!CDROM_CAN(CDC_LOCK))
2469 return -EDRIVE_CANT_DO_THIS;
2470
2471 cdi->keeplocked = arg ? 1 : 0;
2472
2473 /*
2474 * Don't unlock the door on multiple opens by default, but allow
2475 * root to do so.
2476 */
2477 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2478 return -EBUSY;
2479 return cdi->ops->lock_door(cdi, arg);
2480}
2481
2482static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2483 unsigned long arg)
2484{
2485 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2486
2487 if (!capable(CAP_SYS_ADMIN))
2488 return -EACCES;
2489 debug = arg ? 1 : 0;
2490 return debug;
2491}
2492
2493static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2494{
2495 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2496 return (cdi->ops->capability & ~cdi->mask);
2497}
2498
2499/*
2500 * The following function is implemented, although very few audio
2501 * discs give Universal Product Code information, which should just be
2502 * the Medium Catalog Number on the box. Note, that the way the code
2503 * is written on the CD is /not/ uniform across all discs!
2504 */
2505static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2506 void __user *argp)
2507{
2508 struct cdrom_mcn mcn;
2509 int ret;
2510
2511 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2512
2513 if (!(cdi->ops->capability & CDC_MCN))
2514 return -ENOSYS;
2515 ret = cdi->ops->get_mcn(cdi, &mcn);
2516 if (ret)
2517 return ret;
2518
2519 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2520 return -EFAULT;
2521 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2522 return 0;
2523}
2524
2525static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2526 unsigned long arg)
2527{
2528 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2529
2530 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2531 return -ENOSYS;
2532 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2533 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2534 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2535 if (arg >= cdi->capacity)
2536 return -EINVAL;
2537 return cdrom_slot_status(cdi, arg);
2538}
2539
2540/*
2541 * Ok, this is where problems start. The current interface for the
2542 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2543 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2544 * is often the case, it is also very common for CDs to have some tracks
2545 * with data, and some tracks with audio. Just because I feel like it,
2546 * I declare the following to be the best way to cope. If the CD has ANY
2547 * data tracks on it, it will be returned as a data CD. If it has any XA
2548 * tracks, I will return it as that. Now I could simplify this interface
2549 * by combining these returns with the above, but this more clearly
2550 * demonstrates the problem with the current interface. Too bad this
2551 * wasn't designed to use bitmasks... -Erik
2552 *
2553 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2554 * User level programmers might feel the ioctl is not very useful.
2555 * ---david
2556 */
2557static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2558{
2559 tracktype tracks;
2560
2561 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2562
2563 cdrom_count_tracks(cdi, &tracks);
2564 if (tracks.error)
2565 return tracks.error;
2566
2567 /* Policy mode on */
2568 if (tracks.audio > 0) {
2569 if (!tracks.data && !tracks.cdi && !tracks.xa)
2570 return CDS_AUDIO;
2571 else
2572 return CDS_MIXED;
2573 }
2574
2575 if (tracks.cdi > 0)
2576 return CDS_XA_2_2;
2577 if (tracks.xa > 0)
2578 return CDS_XA_2_1;
2579 if (tracks.data > 0)
2580 return CDS_DATA_1;
2581 /* Policy mode off */
2582
2583 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2584 return CDS_NO_INFO;
2585}
2586
2587static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2588{
2589 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2590 return cdi->capacity;
2591}
2592
2593static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2594 void __user *argp)
2595{
2596 struct cdrom_subchnl q;
2597 u8 requested, back;
2598 int ret;
2599
2600 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2601
2602 if (copy_from_user(&q, argp, sizeof(q)))
2603 return -EFAULT;
2604
2605 requested = q.cdsc_format;
2606 if (requested != CDROM_MSF && requested != CDROM_LBA)
2607 return -EINVAL;
2608 q.cdsc_format = CDROM_MSF;
2609
2610 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2611 if (ret)
2612 return ret;
2613
2614 back = q.cdsc_format; /* local copy */
2615 sanitize_format(&q.cdsc_absaddr, &back, requested);
2616 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2617
2618 if (copy_to_user(argp, &q, sizeof(q)))
2619 return -EFAULT;
2620 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2621 return 0;
2622}
2623
2624static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2625 void __user *argp)
2626{
2627 struct cdrom_tochdr header;
2628 int ret;
2629
2630 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2631
2632 if (copy_from_user(&header, argp, sizeof(header)))
2633 return -EFAULT;
2634
2635 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2636 if (ret)
2637 return ret;
2638
2639 if (copy_to_user(argp, &header, sizeof(header)))
2640 return -EFAULT;
2641 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2642 return 0;
2643}
2644
2645int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2646 struct cdrom_tocentry *entry)
2647{
2648 u8 requested_format = entry->cdte_format;
2649 int ret;
2650
2651 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2652 return -EINVAL;
2653
2654 /* make interface to low-level uniform */
2655 entry->cdte_format = CDROM_MSF;
2656 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2657 if (!ret)
2658 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2659 requested_format);
2660 return ret;
2661}
2662EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2663
2664static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2665 void __user *argp)
2666{
2667 struct cdrom_tocentry entry;
2668 int ret;
2669
2670 if (copy_from_user(&entry, argp, sizeof(entry)))
2671 return -EFAULT;
2672 ret = cdrom_read_tocentry(cdi, &entry);
2673 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2674 return -EFAULT;
2675 return ret;
2676}
2677
2678static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2679 void __user *argp)
2680{
2681 struct cdrom_msf msf;
2682
2683 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2684
2685 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2686 return -ENOSYS;
2687 if (copy_from_user(&msf, argp, sizeof(msf)))
2688 return -EFAULT;
2689 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2690}
2691
2692static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2693 void __user *argp)
2694{
2695 struct cdrom_ti ti;
2696 int ret;
2697
2698 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2699
2700 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2701 return -ENOSYS;
2702 if (copy_from_user(&ti, argp, sizeof(ti)))
2703 return -EFAULT;
2704
2705 ret = check_for_audio_disc(cdi, cdi->ops);
2706 if (ret)
2707 return ret;
2708 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2709}
2710static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2711 void __user *argp)
2712{
2713 struct cdrom_volctrl volume;
2714
2715 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2716
2717 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2718 return -ENOSYS;
2719 if (copy_from_user(&volume, argp, sizeof(volume)))
2720 return -EFAULT;
2721 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2722}
2723
2724static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2725 void __user *argp)
2726{
2727 struct cdrom_volctrl volume;
2728 int ret;
2729
2730 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2731
2732 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2733 return -ENOSYS;
2734
2735 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2736 if (ret)
2737 return ret;
2738
2739 if (copy_to_user(argp, &volume, sizeof(volume)))
2740 return -EFAULT;
2741 return 0;
2742}
2743
2744static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2745 unsigned int cmd)
2746{
2747 int ret;
2748
2749 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2750
2751 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2752 return -ENOSYS;
2753 ret = check_for_audio_disc(cdi, cdi->ops);
2754 if (ret)
2755 return ret;
2756 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2757}
2758
2759/*
2760 * Required when we need to use READ_10 to issue other than 2048 block
2761 * reads
2762 */
2763static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2764{
2765 const struct cdrom_device_ops *cdo = cdi->ops;
2766 struct packet_command cgc;
2767 struct modesel_head mh;
2768
2769 memset(&mh, 0, sizeof(mh));
2770 mh.block_desc_length = 0x08;
2771 mh.block_length_med = (size >> 8) & 0xff;
2772 mh.block_length_lo = size & 0xff;
2773
2774 memset(&cgc, 0, sizeof(cgc));
2775 cgc.cmd[0] = 0x15;
2776 cgc.cmd[1] = 1 << 4;
2777 cgc.cmd[4] = 12;
2778 cgc.buflen = sizeof(mh);
2779 cgc.buffer = (char *) &mh;
2780 cgc.data_direction = CGC_DATA_WRITE;
2781 mh.block_desc_length = 0x08;
2782 mh.block_length_med = (size >> 8) & 0xff;
2783 mh.block_length_lo = size & 0xff;
2784
2785 return cdo->generic_packet(cdi, &cgc);
2786}
2787
2788static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2789 __u16 track, __u8 type, track_information *ti)
2790{
2791 const struct cdrom_device_ops *cdo = cdi->ops;
2792 struct packet_command cgc;
2793 int ret, buflen;
2794
2795 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2796 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2797 cgc.cmd[1] = type & 3;
2798 cgc.cmd[4] = (track & 0xff00) >> 8;
2799 cgc.cmd[5] = track & 0xff;
2800 cgc.cmd[8] = 8;
2801 cgc.quiet = 1;
2802
2803 ret = cdo->generic_packet(cdi, &cgc);
2804 if (ret)
2805 return ret;
2806
2807 buflen = be16_to_cpu(ti->track_information_length) +
2808 sizeof(ti->track_information_length);
2809
2810 if (buflen > sizeof(track_information))
2811 buflen = sizeof(track_information);
2812
2813 cgc.cmd[8] = cgc.buflen = buflen;
2814 ret = cdo->generic_packet(cdi, &cgc);
2815 if (ret)
2816 return ret;
2817
2818 /* return actual fill size */
2819 return buflen;
2820}
2821
2822/* return the last written block on the CD-R media. this is for the udf
2823 file system. */
2824int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2825{
2826 struct cdrom_tocentry toc;
2827 disc_information di;
2828 track_information ti;
2829 __u32 last_track;
2830 int ret = -1, ti_size;
2831
2832 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2833 goto use_toc;
2834
2835 ret = cdrom_get_disc_info(cdi, &di);
2836 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2837 + sizeof(di.last_track_lsb)))
2838 goto use_toc;
2839
2840 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2841 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2842 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2843 if (ti_size < (int)offsetof(typeof(ti), track_start))
2844 goto use_toc;
2845
2846 /* if this track is blank, try the previous. */
2847 if (ti.blank) {
2848 if (last_track == 1)
2849 goto use_toc;
2850 last_track--;
2851 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2852 }
2853
2854 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2855 + sizeof(ti.track_size)))
2856 goto use_toc;
2857
2858 /* if last recorded field is valid, return it. */
2859 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2860 + sizeof(ti.last_rec_address))) {
2861 *last_written = be32_to_cpu(ti.last_rec_address);
2862 } else {
2863 /* make it up instead */
2864 *last_written = be32_to_cpu(ti.track_start) +
2865 be32_to_cpu(ti.track_size);
2866 if (ti.free_blocks)
2867 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2868 }
2869 return 0;
2870
2871 /* this is where we end up if the drive either can't do a
2872 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2873 it doesn't give enough information or fails. then we return
2874 the toc contents. */
2875use_toc:
2876 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2877 return -ENOSYS;
2878
2879 toc.cdte_format = CDROM_MSF;
2880 toc.cdte_track = CDROM_LEADOUT;
2881 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2882 return ret;
2883 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2884 *last_written = toc.cdte_addr.lba;
2885 return 0;
2886}
2887EXPORT_SYMBOL(cdrom_get_last_written);
2888
2889/* return the next writable block. also for udf file system. */
2890static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2891 long *next_writable)
2892{
2893 disc_information di;
2894 track_information ti;
2895 __u16 last_track;
2896 int ret, ti_size;
2897
2898 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2899 goto use_last_written;
2900
2901 ret = cdrom_get_disc_info(cdi, &di);
2902 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2903 + sizeof(di.last_track_lsb))
2904 goto use_last_written;
2905
2906 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2907 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2908 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2909 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2910 goto use_last_written;
2911
2912 /* if this track is blank, try the previous. */
2913 if (ti.blank) {
2914 if (last_track == 1)
2915 goto use_last_written;
2916 last_track--;
2917 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2918 if (ti_size < 0)
2919 goto use_last_written;
2920 }
2921
2922 /* if next recordable address field is valid, use it. */
2923 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2924 + sizeof(ti.next_writable)) {
2925 *next_writable = be32_to_cpu(ti.next_writable);
2926 return 0;
2927 }
2928
2929use_last_written:
2930 ret = cdrom_get_last_written(cdi, next_writable);
2931 if (ret) {
2932 *next_writable = 0;
2933 return ret;
2934 } else {
2935 *next_writable += 7;
2936 return 0;
2937 }
2938}
2939
2940static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2941 void __user *arg,
2942 struct packet_command *cgc,
2943 int cmd)
2944{
2945 struct scsi_sense_hdr sshdr;
2946 struct cdrom_msf msf;
2947 int blocksize = 0, format = 0, lba;
2948 int ret;
2949
2950 switch (cmd) {
2951 case CDROMREADRAW:
2952 blocksize = CD_FRAMESIZE_RAW;
2953 break;
2954 case CDROMREADMODE1:
2955 blocksize = CD_FRAMESIZE;
2956 format = 2;
2957 break;
2958 case CDROMREADMODE2:
2959 blocksize = CD_FRAMESIZE_RAW0;
2960 break;
2961 }
2962 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2963 return -EFAULT;
2964 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2965 /* FIXME: we need upper bound checking, too!! */
2966 if (lba < 0)
2967 return -EINVAL;
2968
2969 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2970 if (cgc->buffer == NULL)
2971 return -ENOMEM;
2972
2973 memset(&sshdr, 0, sizeof(sshdr));
2974 cgc->sshdr = &sshdr;
2975 cgc->data_direction = CGC_DATA_READ;
2976 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2977 if (ret && sshdr.sense_key == 0x05 &&
2978 sshdr.asc == 0x20 &&
2979 sshdr.ascq == 0x00) {
2980 /*
2981 * SCSI-II devices are not required to support
2982 * READ_CD, so let's try switching block size
2983 */
2984 if (blocksize != CD_FRAMESIZE) {
2985 ret = cdrom_switch_blocksize(cdi, blocksize);
2986 if (ret)
2987 goto out;
2988 }
2989 cgc->sshdr = NULL;
2990 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2991 if (blocksize != CD_FRAMESIZE)
2992 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
2993 }
2994 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2995 ret = -EFAULT;
2996out:
2997 kfree(cgc->buffer);
2998 return ret;
2999}
3000
3001static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3002 void __user *arg)
3003{
3004 struct cdrom_read_audio ra;
3005 int lba;
3006
3007#ifdef CONFIG_COMPAT
3008 if (in_compat_syscall()) {
3009 struct compat_cdrom_read_audio {
3010 union cdrom_addr addr;
3011 u8 addr_format;
3012 compat_int_t nframes;
3013 compat_caddr_t buf;
3014 } ra32;
3015
3016 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3017 return -EFAULT;
3018
3019 ra = (struct cdrom_read_audio) {
3020 .addr = ra32.addr,
3021 .addr_format = ra32.addr_format,
3022 .nframes = ra32.nframes,
3023 .buf = compat_ptr(ra32.buf),
3024 };
3025 } else
3026#endif
3027 {
3028 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3029 sizeof(ra)))
3030 return -EFAULT;
3031 }
3032
3033 if (ra.addr_format == CDROM_MSF)
3034 lba = msf_to_lba(ra.addr.msf.minute,
3035 ra.addr.msf.second,
3036 ra.addr.msf.frame);
3037 else if (ra.addr_format == CDROM_LBA)
3038 lba = ra.addr.lba;
3039 else
3040 return -EINVAL;
3041
3042 /* FIXME: we need upper bound checking, too!! */
3043 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3044 return -EINVAL;
3045
3046 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3047}
3048
3049static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3050 void __user *arg)
3051{
3052 int ret;
3053 struct cdrom_subchnl q;
3054 u_char requested, back;
3055 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3056 return -EFAULT;
3057 requested = q.cdsc_format;
3058 if (!((requested == CDROM_MSF) ||
3059 (requested == CDROM_LBA)))
3060 return -EINVAL;
3061
3062 ret = cdrom_read_subchannel(cdi, &q, 0);
3063 if (ret)
3064 return ret;
3065 back = q.cdsc_format; /* local copy */
3066 sanitize_format(&q.cdsc_absaddr, &back, requested);
3067 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3068 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3069 return -EFAULT;
3070 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3071 return 0;
3072}
3073
3074static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3075 void __user *arg,
3076 struct packet_command *cgc)
3077{
3078 const struct cdrom_device_ops *cdo = cdi->ops;
3079 struct cdrom_msf msf;
3080 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3081 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3082 return -EFAULT;
3083 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3084 cgc->cmd[3] = msf.cdmsf_min0;
3085 cgc->cmd[4] = msf.cdmsf_sec0;
3086 cgc->cmd[5] = msf.cdmsf_frame0;
3087 cgc->cmd[6] = msf.cdmsf_min1;
3088 cgc->cmd[7] = msf.cdmsf_sec1;
3089 cgc->cmd[8] = msf.cdmsf_frame1;
3090 cgc->data_direction = CGC_DATA_NONE;
3091 return cdo->generic_packet(cdi, cgc);
3092}
3093
3094static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3095 void __user *arg,
3096 struct packet_command *cgc)
3097{
3098 const struct cdrom_device_ops *cdo = cdi->ops;
3099 struct cdrom_blk blk;
3100 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3101 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3102 return -EFAULT;
3103 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3104 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3105 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3106 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3107 cgc->cmd[5] = blk.from & 0xff;
3108 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3109 cgc->cmd[8] = blk.len & 0xff;
3110 cgc->data_direction = CGC_DATA_NONE;
3111 return cdo->generic_packet(cdi, cgc);
3112}
3113
3114static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3115 void __user *arg,
3116 struct packet_command *cgc,
3117 unsigned int cmd)
3118{
3119 struct cdrom_volctrl volctrl;
3120 unsigned char buffer[32];
3121 char mask[sizeof(buffer)];
3122 unsigned short offset;
3123 int ret;
3124
3125 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3126
3127 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3128 sizeof(volctrl)))
3129 return -EFAULT;
3130
3131 cgc->buffer = buffer;
3132 cgc->buflen = 24;
3133 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3134 if (ret)
3135 return ret;
3136
3137 /* originally the code depended on buffer[1] to determine
3138 how much data is available for transfer. buffer[1] is
3139 unfortunately ambigious and the only reliable way seem
3140 to be to simply skip over the block descriptor... */
3141 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3142
3143 if (offset + 16 > sizeof(buffer))
3144 return -E2BIG;
3145
3146 if (offset + 16 > cgc->buflen) {
3147 cgc->buflen = offset + 16;
3148 ret = cdrom_mode_sense(cdi, cgc,
3149 GPMODE_AUDIO_CTL_PAGE, 0);
3150 if (ret)
3151 return ret;
3152 }
3153
3154 /* sanity check */
3155 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3156 buffer[offset + 1] < 14)
3157 return -EINVAL;
3158
3159 /* now we have the current volume settings. if it was only
3160 a CDROMVOLREAD, return these values */
3161 if (cmd == CDROMVOLREAD) {
3162 volctrl.channel0 = buffer[offset+9];
3163 volctrl.channel1 = buffer[offset+11];
3164 volctrl.channel2 = buffer[offset+13];
3165 volctrl.channel3 = buffer[offset+15];
3166 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3167 sizeof(volctrl)))
3168 return -EFAULT;
3169 return 0;
3170 }
3171
3172 /* get the volume mask */
3173 cgc->buffer = mask;
3174 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3175 if (ret)
3176 return ret;
3177
3178 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3179 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3180 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3181 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3182
3183 /* set volume */
3184 cgc->buffer = buffer + offset - 8;
3185 memset(cgc->buffer, 0, 8);
3186 return cdrom_mode_select(cdi, cgc);
3187}
3188
3189static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3190 struct packet_command *cgc,
3191 int cmd)
3192{
3193 const struct cdrom_device_ops *cdo = cdi->ops;
3194 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3195 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3196 cgc->cmd[1] = 1;
3197 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3198 cgc->data_direction = CGC_DATA_NONE;
3199 return cdo->generic_packet(cdi, cgc);
3200}
3201
3202static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3203 struct packet_command *cgc,
3204 int cmd)
3205{
3206 const struct cdrom_device_ops *cdo = cdi->ops;
3207 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3208 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3209 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3210 cgc->data_direction = CGC_DATA_NONE;
3211 return cdo->generic_packet(cdi, cgc);
3212}
3213
3214static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3215 void __user *arg,
3216 struct packet_command *cgc)
3217{
3218 int ret;
3219 dvd_struct *s;
3220 int size = sizeof(dvd_struct);
3221
3222 if (!CDROM_CAN(CDC_DVD))
3223 return -ENOSYS;
3224
3225 s = memdup_user(arg, size);
3226 if (IS_ERR(s))
3227 return PTR_ERR(s);
3228
3229 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3230
3231 ret = dvd_read_struct(cdi, s, cgc);
3232 if (ret)
3233 goto out;
3234
3235 if (copy_to_user(arg, s, size))
3236 ret = -EFAULT;
3237out:
3238 kfree(s);
3239 return ret;
3240}
3241
3242static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3243 void __user *arg)
3244{
3245 int ret;
3246 dvd_authinfo ai;
3247 if (!CDROM_CAN(CDC_DVD))
3248 return -ENOSYS;
3249 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3250 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3251 return -EFAULT;
3252 ret = dvd_do_auth(cdi, &ai);
3253 if (ret)
3254 return ret;
3255 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3256 return -EFAULT;
3257 return 0;
3258}
3259
3260static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3261 void __user *arg)
3262{
3263 int ret;
3264 long next = 0;
3265 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3266 ret = cdrom_get_next_writable(cdi, &next);
3267 if (ret)
3268 return ret;
3269 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3270 return -EFAULT;
3271 return 0;
3272}
3273
3274static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3275 void __user *arg)
3276{
3277 int ret;
3278 long last = 0;
3279 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3280 ret = cdrom_get_last_written(cdi, &last);
3281 if (ret)
3282 return ret;
3283 if (in_compat_syscall())
3284 return put_user(last, (__s32 __user *)arg);
3285
3286 return put_user(last, (long __user *)arg);
3287}
3288
3289static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3290 unsigned long arg)
3291{
3292 struct packet_command cgc;
3293 void __user *userptr = (void __user *)arg;
3294
3295 memset(&cgc, 0, sizeof(cgc));
3296
3297 /* build a unified command and queue it through
3298 cdo->generic_packet() */
3299 switch (cmd) {
3300 case CDROMREADRAW:
3301 case CDROMREADMODE1:
3302 case CDROMREADMODE2:
3303 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3304 case CDROMREADAUDIO:
3305 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3306 case CDROMSUBCHNL:
3307 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3308 case CDROMPLAYMSF:
3309 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3310 case CDROMPLAYBLK:
3311 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3312 case CDROMVOLCTRL:
3313 case CDROMVOLREAD:
3314 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3315 case CDROMSTART:
3316 case CDROMSTOP:
3317 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3318 case CDROMPAUSE:
3319 case CDROMRESUME:
3320 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3321 case DVD_READ_STRUCT:
3322 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3323 case DVD_AUTH:
3324 return mmc_ioctl_dvd_auth(cdi, userptr);
3325 case CDROM_NEXT_WRITABLE:
3326 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3327 case CDROM_LAST_WRITTEN:
3328 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3329 }
3330
3331 return -ENOTTY;
3332}
3333
3334/*
3335 * Just about every imaginable ioctl is supported in the Uniform layer
3336 * these days.
3337 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3338 */
3339int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3340 fmode_t mode, unsigned int cmd, unsigned long arg)
3341{
3342 void __user *argp = (void __user *)arg;
3343 int ret;
3344
3345 switch (cmd) {
3346 case CDROMMULTISESSION:
3347 return cdrom_ioctl_multisession(cdi, argp);
3348 case CDROMEJECT:
3349 return cdrom_ioctl_eject(cdi);
3350 case CDROMCLOSETRAY:
3351 return cdrom_ioctl_closetray(cdi);
3352 case CDROMEJECT_SW:
3353 return cdrom_ioctl_eject_sw(cdi, arg);
3354 case CDROM_MEDIA_CHANGED:
3355 return cdrom_ioctl_media_changed(cdi, arg);
3356 case CDROM_TIMED_MEDIA_CHANGE:
3357 return cdrom_ioctl_timed_media_change(cdi, arg);
3358 case CDROM_SET_OPTIONS:
3359 return cdrom_ioctl_set_options(cdi, arg);
3360 case CDROM_CLEAR_OPTIONS:
3361 return cdrom_ioctl_clear_options(cdi, arg);
3362 case CDROM_SELECT_SPEED:
3363 return cdrom_ioctl_select_speed(cdi, arg);
3364 case CDROM_SELECT_DISC:
3365 return cdrom_ioctl_select_disc(cdi, arg);
3366 case CDROMRESET:
3367 return cdrom_ioctl_reset(cdi, bdev);
3368 case CDROM_LOCKDOOR:
3369 return cdrom_ioctl_lock_door(cdi, arg);
3370 case CDROM_DEBUG:
3371 return cdrom_ioctl_debug(cdi, arg);
3372 case CDROM_GET_CAPABILITY:
3373 return cdrom_ioctl_get_capability(cdi);
3374 case CDROM_GET_MCN:
3375 return cdrom_ioctl_get_mcn(cdi, argp);
3376 case CDROM_DRIVE_STATUS:
3377 return cdrom_ioctl_drive_status(cdi, arg);
3378 case CDROM_DISC_STATUS:
3379 return cdrom_ioctl_disc_status(cdi);
3380 case CDROM_CHANGER_NSLOTS:
3381 return cdrom_ioctl_changer_nslots(cdi);
3382 }
3383
3384 /*
3385 * Use the ioctls that are implemented through the generic_packet()
3386 * interface. this may look at bit funny, but if -ENOTTY is
3387 * returned that particular ioctl is not implemented and we
3388 * let it go through the device specific ones.
3389 */
3390 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3391 ret = mmc_ioctl(cdi, cmd, arg);
3392 if (ret != -ENOTTY)
3393 return ret;
3394 }
3395
3396 /*
3397 * Note: most of the cd_dbg() calls are commented out here,
3398 * because they fill up the sys log when CD players poll
3399 * the drive.
3400 */
3401 switch (cmd) {
3402 case CDROMSUBCHNL:
3403 return cdrom_ioctl_get_subchnl(cdi, argp);
3404 case CDROMREADTOCHDR:
3405 return cdrom_ioctl_read_tochdr(cdi, argp);
3406 case CDROMREADTOCENTRY:
3407 return cdrom_ioctl_read_tocentry(cdi, argp);
3408 case CDROMPLAYMSF:
3409 return cdrom_ioctl_play_msf(cdi, argp);
3410 case CDROMPLAYTRKIND:
3411 return cdrom_ioctl_play_trkind(cdi, argp);
3412 case CDROMVOLCTRL:
3413 return cdrom_ioctl_volctrl(cdi, argp);
3414 case CDROMVOLREAD:
3415 return cdrom_ioctl_volread(cdi, argp);
3416 case CDROMSTART:
3417 case CDROMSTOP:
3418 case CDROMPAUSE:
3419 case CDROMRESUME:
3420 return cdrom_ioctl_audioctl(cdi, cmd);
3421 }
3422
3423 return -ENOSYS;
3424}
3425EXPORT_SYMBOL(cdrom_ioctl);
3426
3427#ifdef CONFIG_SYSCTL
3428
3429#define CDROM_STR_SIZE 1000
3430
3431static struct cdrom_sysctl_settings {
3432 char info[CDROM_STR_SIZE]; /* general info */
3433 int autoclose; /* close tray upon mount, etc */
3434 int autoeject; /* eject on umount */
3435 int debug; /* turn on debugging messages */
3436 int lock; /* lock the door on device open */
3437 int check; /* check media type */
3438} cdrom_sysctl_settings;
3439
3440enum cdrom_print_option {
3441 CTL_NAME,
3442 CTL_SPEED,
3443 CTL_SLOTS,
3444 CTL_CAPABILITY
3445};
3446
3447static int cdrom_print_info(const char *header, int val, char *info,
3448 int *pos, enum cdrom_print_option option)
3449{
3450 const int max_size = sizeof(cdrom_sysctl_settings.info);
3451 struct cdrom_device_info *cdi;
3452 int ret;
3453
3454 ret = scnprintf(info + *pos, max_size - *pos, header);
3455 if (!ret)
3456 return 1;
3457
3458 *pos += ret;
3459
3460 list_for_each_entry(cdi, &cdrom_list, list) {
3461 switch (option) {
3462 case CTL_NAME:
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%s", cdi->name);
3465 break;
3466 case CTL_SPEED:
3467 ret = scnprintf(info + *pos, max_size - *pos,
3468 "\t%d", cdi->speed);
3469 break;
3470 case CTL_SLOTS:
3471 ret = scnprintf(info + *pos, max_size - *pos,
3472 "\t%d", cdi->capacity);
3473 break;
3474 case CTL_CAPABILITY:
3475 ret = scnprintf(info + *pos, max_size - *pos,
3476 "\t%d", CDROM_CAN(val) != 0);
3477 break;
3478 default:
3479 pr_info("invalid option%d\n", option);
3480 return 1;
3481 }
3482 if (!ret)
3483 return 1;
3484 *pos += ret;
3485 }
3486
3487 return 0;
3488}
3489
3490static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3491 void *buffer, size_t *lenp, loff_t *ppos)
3492{
3493 int pos;
3494 char *info = cdrom_sysctl_settings.info;
3495 const int max_size = sizeof(cdrom_sysctl_settings.info);
3496
3497 if (!*lenp || (*ppos && !write)) {
3498 *lenp = 0;
3499 return 0;
3500 }
3501
3502 mutex_lock(&cdrom_mutex);
3503
3504 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3505
3506 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3507 goto done;
3508 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3509 goto done;
3510 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3511 goto done;
3512 if (cdrom_print_info("\nCan close tray:\t",
3513 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3514 goto done;
3515 if (cdrom_print_info("\nCan open tray:\t",
3516 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3517 goto done;
3518 if (cdrom_print_info("\nCan lock tray:\t",
3519 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3520 goto done;
3521 if (cdrom_print_info("\nCan change speed:",
3522 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3523 goto done;
3524 if (cdrom_print_info("\nCan select disk:",
3525 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3526 goto done;
3527 if (cdrom_print_info("\nCan read multisession:",
3528 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3529 goto done;
3530 if (cdrom_print_info("\nCan read MCN:\t",
3531 CDC_MCN, info, &pos, CTL_CAPABILITY))
3532 goto done;
3533 if (cdrom_print_info("\nReports media changed:",
3534 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3535 goto done;
3536 if (cdrom_print_info("\nCan play audio:\t",
3537 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3538 goto done;
3539 if (cdrom_print_info("\nCan write CD-R:\t",
3540 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3541 goto done;
3542 if (cdrom_print_info("\nCan write CD-RW:",
3543 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3544 goto done;
3545 if (cdrom_print_info("\nCan read DVD:\t",
3546 CDC_DVD, info, &pos, CTL_CAPABILITY))
3547 goto done;
3548 if (cdrom_print_info("\nCan write DVD-R:",
3549 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3550 goto done;
3551 if (cdrom_print_info("\nCan write DVD-RAM:",
3552 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3553 goto done;
3554 if (cdrom_print_info("\nCan read MRW:\t",
3555 CDC_MRW, info, &pos, CTL_CAPABILITY))
3556 goto done;
3557 if (cdrom_print_info("\nCan write MRW:\t",
3558 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3559 goto done;
3560 if (cdrom_print_info("\nCan write RAM:\t",
3561 CDC_RAM, info, &pos, CTL_CAPABILITY))
3562 goto done;
3563 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3564 goto done;
3565doit:
3566 mutex_unlock(&cdrom_mutex);
3567 return proc_dostring(ctl, write, buffer, lenp, ppos);
3568done:
3569 pr_info("info buffer too small\n");
3570 goto doit;
3571}
3572
3573/* Unfortunately, per device settings are not implemented through
3574 procfs/sysctl yet. When they are, this will naturally disappear. For now
3575 just update all drives. Later this will become the template on which
3576 new registered drives will be based. */
3577static void cdrom_update_settings(void)
3578{
3579 struct cdrom_device_info *cdi;
3580
3581 mutex_lock(&cdrom_mutex);
3582 list_for_each_entry(cdi, &cdrom_list, list) {
3583 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3584 cdi->options |= CDO_AUTO_CLOSE;
3585 else if (!autoclose)
3586 cdi->options &= ~CDO_AUTO_CLOSE;
3587 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3588 cdi->options |= CDO_AUTO_EJECT;
3589 else if (!autoeject)
3590 cdi->options &= ~CDO_AUTO_EJECT;
3591 if (lockdoor && CDROM_CAN(CDC_LOCK))
3592 cdi->options |= CDO_LOCK;
3593 else if (!lockdoor)
3594 cdi->options &= ~CDO_LOCK;
3595 if (check_media_type)
3596 cdi->options |= CDO_CHECK_TYPE;
3597 else
3598 cdi->options &= ~CDO_CHECK_TYPE;
3599 }
3600 mutex_unlock(&cdrom_mutex);
3601}
3602
3603static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3604 void *buffer, size_t *lenp, loff_t *ppos)
3605{
3606 int ret;
3607
3608 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3609
3610 if (write) {
3611
3612 /* we only care for 1 or 0. */
3613 autoclose = !!cdrom_sysctl_settings.autoclose;
3614 autoeject = !!cdrom_sysctl_settings.autoeject;
3615 debug = !!cdrom_sysctl_settings.debug;
3616 lockdoor = !!cdrom_sysctl_settings.lock;
3617 check_media_type = !!cdrom_sysctl_settings.check;
3618
3619 /* update the option flags according to the changes. we
3620 don't have per device options through sysctl yet,
3621 but we will have and then this will disappear. */
3622 cdrom_update_settings();
3623 }
3624
3625 return ret;
3626}
3627
3628/* Place files in /proc/sys/dev/cdrom */
3629static struct ctl_table cdrom_table[] = {
3630 {
3631 .procname = "info",
3632 .data = &cdrom_sysctl_settings.info,
3633 .maxlen = CDROM_STR_SIZE,
3634 .mode = 0444,
3635 .proc_handler = cdrom_sysctl_info,
3636 },
3637 {
3638 .procname = "autoclose",
3639 .data = &cdrom_sysctl_settings.autoclose,
3640 .maxlen = sizeof(int),
3641 .mode = 0644,
3642 .proc_handler = cdrom_sysctl_handler,
3643 },
3644 {
3645 .procname = "autoeject",
3646 .data = &cdrom_sysctl_settings.autoeject,
3647 .maxlen = sizeof(int),
3648 .mode = 0644,
3649 .proc_handler = cdrom_sysctl_handler,
3650 },
3651 {
3652 .procname = "debug",
3653 .data = &cdrom_sysctl_settings.debug,
3654 .maxlen = sizeof(int),
3655 .mode = 0644,
3656 .proc_handler = cdrom_sysctl_handler,
3657 },
3658 {
3659 .procname = "lock",
3660 .data = &cdrom_sysctl_settings.lock,
3661 .maxlen = sizeof(int),
3662 .mode = 0644,
3663 .proc_handler = cdrom_sysctl_handler,
3664 },
3665 {
3666 .procname = "check_media",
3667 .data = &cdrom_sysctl_settings.check,
3668 .maxlen = sizeof(int),
3669 .mode = 0644,
3670 .proc_handler = cdrom_sysctl_handler
3671 },
3672 { }
3673};
3674static struct ctl_table_header *cdrom_sysctl_header;
3675
3676static void cdrom_sysctl_register(void)
3677{
3678 static atomic_t initialized = ATOMIC_INIT(0);
3679
3680 if (!atomic_add_unless(&initialized, 1, 1))
3681 return;
3682
3683 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
3684
3685 /* set the defaults */
3686 cdrom_sysctl_settings.autoclose = autoclose;
3687 cdrom_sysctl_settings.autoeject = autoeject;
3688 cdrom_sysctl_settings.debug = debug;
3689 cdrom_sysctl_settings.lock = lockdoor;
3690 cdrom_sysctl_settings.check = check_media_type;
3691}
3692
3693static void cdrom_sysctl_unregister(void)
3694{
3695 if (cdrom_sysctl_header)
3696 unregister_sysctl_table(cdrom_sysctl_header);
3697}
3698
3699#else /* CONFIG_SYSCTL */
3700
3701static void cdrom_sysctl_register(void)
3702{
3703}
3704
3705static void cdrom_sysctl_unregister(void)
3706{
3707}
3708
3709#endif /* CONFIG_SYSCTL */
3710
3711static int __init cdrom_init(void)
3712{
3713 cdrom_sysctl_register();
3714
3715 return 0;
3716}
3717
3718static void __exit cdrom_exit(void)
3719{
3720 pr_info("Uniform CD-ROM driver unloaded\n");
3721 cdrom_sysctl_unregister();
3722}
3723
3724module_init(cdrom_init);
3725module_exit(cdrom_exit);
3726MODULE_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");