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Merge branch 'parisc-4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
[linux-2.6-block.git] / drivers / cdrom / cdrom.c
CommitLineData
f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
25985edc 33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
1da177e4
LT		 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
e597cd09
JP		 245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
1da177e4
LT		 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
1da177e4
LT		 268#include <linux/module.h>
269#include <linux/fs.h>
1da177e4
LT		 270#include <linux/major.h>
271#include <linux/types.h>
272#include <linux/errno.h>
273#include <linux/kernel.h>
274#include <linux/mm.h>
275#include <linux/slab.h>
276#include <linux/cdrom.h>
277#include <linux/sysctl.h>
278#include <linux/proc_fs.h>
279#include <linux/blkpg.h>
280#include <linux/init.h>
281#include <linux/fcntl.h>
282#include <linux/blkdev.h>
283#include <linux/times.h>
284
285#include <asm/uaccess.h>
286
287/* used to tell the module to turn on full debugging messages */
90ab5ee9 288static bool debug;
1da177e4 289/* default compatibility mode */
90ab5ee9
RR		 290static bool autoclose=1;
291static bool autoeject;
292static bool lockdoor = 1;
1da177e4 293/* will we ever get to use this... sigh. */
90ab5ee9 294static bool check_media_type;
1da177e4 295/* automatically restart mrw format */
90ab5ee9 296static bool mrw_format_restart = 1;
1da177e4
LT		 297module_param(debug, bool, 0);
298module_param(autoclose, bool, 0);
299module_param(autoeject, bool, 0);
300module_param(lockdoor, bool, 0);
301module_param(check_media_type, bool, 0);
302module_param(mrw_format_restart, bool, 0);
303
554988d6 304static DEFINE_MUTEX(cdrom_mutex);
1da177e4
LT		 305
306static const char *mrw_format_status[] = {
307 "not mrw",
308 "bgformat inactive",
309 "bgformat active",
310 "mrw complete",
311};
312
313static const char *mrw_address_space[] = { "DMA", "GAA" };
314
5944b2ce
JP		 315#if (ERRLOGMASK != CD_NOTHING)
316#define cd_dbg(type, fmt, ...) \
e597cd09
JP		 317do { \
318 if ((ERRLOGMASK & type) || debug == 1) \
5944b2ce 319 pr_debug(fmt, ##__VA_ARGS__); \
e597cd09 320} while (0)
1da177e4 321#else
5944b2ce 322#define cd_dbg(type, fmt, ...) \
e597cd09
JP		 323do { \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
5944b2ce 325 pr_debug(fmt, ##__VA_ARGS__); \
e597cd09 326} while (0)
1da177e4
LT		 327#endif
328
1da177e4
LT		 329/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
330 a lot of places. This macro makes the code more clear. */
331#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
332
2e11c207
JA		 333/*
334 * Another popular OS uses 7 seconds as the hard timeout for default
335 * commands, so it is a good choice for us as well.
336 */
337#define CDROM_DEF_TIMEOUT (7 * HZ)
338
1da177e4 339/* Not-exported routines. */
1da177e4 340
1da177e4 341static void cdrom_sysctl_register(void);
17672cf0 342
7fd097d4 343static LIST_HEAD(cdrom_list);
1da177e4
LT		 344
345static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
347{
348 if (cgc->sense) {
349 cgc->sense->sense_key = 0x05;
350 cgc->sense->asc = 0x20;
351 cgc->sense->ascq = 0x00;
352 }
353
354 cgc->stat = -EIO;
355 return -EIO;
356}
357
40569c61 358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
1da177e4
LT		 359{
360 struct packet_command cgc;
1da177e4 361
40569c61
JP		 362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
1da177e4 364
40569c61 365 cgc.timeout = 5 * 60 * HZ;
1da177e4 366
40569c61 367 return cdi->ops->generic_packet(cdi, &cgc);
1da177e4
LT		 368}
369
bd6f0bba
JP		 370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
40569c61
JP		 406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
411#define ENSURE(call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 *change_capability &= ~(bits); \
415} while (0)
416
1da177e4
LT		 417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
fce53847 424 char buffer[16];
1da177e4 425
fce53847 426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
fce53847 433 return 0;
1da177e4
LT		 434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
fce53847 436 return 0;
1da177e4 437 }
fce53847
FT		 438
439 return 1;
1da177e4
LT		 440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
fce53847 446 unsigned char buffer[16];
1da177e4
LT		 447 int ret;
448
449 *write = 0;
450
fce53847 451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
fce53847 455 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 459 return ret;
1da177e4
LT		 460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
fce53847
FT		 462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
1da177e4
LT		 464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
fce53847 468 return ret;
1da177e4 469 }
fce53847
FT		 470
471 return 0;
1da177e4
LT		 472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
fce53847 477 unsigned char buffer[12];
1da177e4
LT		 478 int ret;
479
e597cd09 480 pr_info("%sstarting format\n", cont ? "Re" : "");
1da177e4
LT		 481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
fce53847 485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
1da177e4
LT		 486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
e597cd09 510 pr_info("bgformat failed\n");
1da177e4
LT		 511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
1da177e4
LT		 533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
e597cd09 544 pr_info("issuing MRW background format suspend\n");
1da177e4
LT		 545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
7da21a02 548 if (!ret && cdi->media_written)
1da177e4
LT		 549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
fce53847 558 char buffer[16];
1da177e4
LT		 559 int ret, offset, size;
560
fce53847 561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4 562
fce53847
FT		 563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
1da177e4 565
40569c61
JP		 566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
fce53847 568 return ret;
1da177e4 569
40569c61 570 mph = (struct mode_page_header *)buffer;
1da177e4
LT		 571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
40569c61
JP		 577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
fce53847 579 return ret;
1da177e4 580
e597cd09
JP		 581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
fce53847 583 return 0;
1da177e4
LT		 584}
585
40569c61
JP		 586int register_cdrom(struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 struct cdrom_device_ops *cdo = cdi->ops;
590 int *change_capability = (int *)&cdo->capability; /* hack */
591
592 cd_dbg(CD_OPEN, "entering register_cdrom\n");
593
594 if (cdo->open == NULL || cdo->release == NULL)
595 return -EINVAL;
596 if (!banner_printed) {
597 pr_info("Uniform CD-ROM driver " REVISION "\n");
598 banner_printed = 1;
599 cdrom_sysctl_register();
600 }
601
602 ENSURE(drive_status, CDC_DRIVE_STATUS);
603 if (cdo->check_events == NULL && cdo->media_changed == NULL)
604 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
605 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
606 ENSURE(lock_door, CDC_LOCK);
607 ENSURE(select_speed, CDC_SELECT_SPEED);
608 ENSURE(get_last_session, CDC_MULTI_SESSION);
609 ENSURE(get_mcn, CDC_MCN);
610 ENSURE(reset, CDC_RESET);
611 ENSURE(generic_packet, CDC_GENERIC_PACKET);
612 cdi->mc_flags = 0;
613 cdo->n_minors = 0;
614 cdi->options = CDO_USE_FFLAGS;
615
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
620 if (lockdoor == 1)
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
624
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
627
628 if (cdi->disk)
629 cdi->cdda_method = CDDA_BPC_FULL;
630 else
631 cdi->cdda_method = CDDA_OLD;
632
633 if (!cdo->generic_packet)
634 cdo->generic_packet = cdrom_dummy_generic_packet;
635
636 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
637 mutex_lock(&cdrom_mutex);
638 list_add(&cdi->list, &cdrom_list);
639 mutex_unlock(&cdrom_mutex);
640 return 0;
641}
642#undef ENSURE
643
644void unregister_cdrom(struct cdrom_device_info *cdi)
645{
646 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
647
648 mutex_lock(&cdrom_mutex);
649 list_del(&cdi->list);
650 mutex_unlock(&cdrom_mutex);
651
652 if (cdi->exit)
653 cdi->exit(cdi);
654
655 cdi->ops->n_minors--;
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658
659int cdrom_get_media_event(struct cdrom_device_info *cdi,
660 struct media_event_desc *med)
661{
662 struct packet_command cgc;
663 unsigned char buffer[8];
664 struct event_header *eh = (struct event_header *)buffer;
665
666 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
667 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
668 cgc.cmd[1] = 1; /* IMMED */
669 cgc.cmd[4] = 1 << 4; /* media event */
670 cgc.cmd[8] = sizeof(buffer);
671 cgc.quiet = 1;
672
673 if (cdi->ops->generic_packet(cdi, &cgc))
674 return 1;
675
676 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 return 1;
678
679 if (eh->nea || eh->notification_class != 0x4)
680 return 1;
681
682 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
683 return 0;
684}
685
1da177e4
LT		 686static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
687 struct rwrt_feature_desc *rfd)
688{
689 struct packet_command cgc;
fce53847 690 char buffer[24];
1da177e4
LT		 691 int ret;
692
fce53847 693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
696 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
fce53847 697 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
1da177e4
LT		 698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 701 return ret;
1da177e4
LT		 702
703 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
fce53847 704 return 0;
1da177e4
LT		 705}
706
707static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
708{
709 struct packet_command cgc;
fce53847 710 char buffer[16];
56052d52 711 __be16 *feature_code;
1da177e4
LT		 712 int ret;
713
fce53847 714 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 715
716 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
717 cgc.cmd[3] = CDF_HWDM;
fce53847 718 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 719 cgc.quiet = 1;
720
721 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 722 return ret;
1da177e4 723
56052d52 724 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4 725 if (be16_to_cpu(*feature_code) == CDF_HWDM)
fce53847
FT		 726 return 0;
727
728 return 1;
1da177e4
LT		 729}
730
731
732static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
733{
734 struct rwrt_feature_desc rfd;
735 int ret;
736
737 *write = 0;
738
739 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 return ret;
741
742 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
743 *write = 1;
744
745 return 0;
746}
747
748static int cdrom_media_erasable(struct cdrom_device_info *cdi)
749{
750 disc_information di;
751 int ret;
752
753 ret = cdrom_get_disc_info(cdi, &di);
754 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
755 return -1;
756
757 return di.erasable;
758}
759
760/*
761 * FIXME: check RO bit
762 */
763static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
764{
765 int ret = cdrom_media_erasable(cdi);
766
767 /*
768 * allow writable open if media info read worked and media is
769 * erasable, _or_ if it fails since not all drives support it
770 */
771 if (!ret)
772 return 1;
773
774 return 0;
775}
776
777static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
778{
779 disc_information di;
780 int ret;
781
782 /*
783 * always reset to DMA lba space on open
784 */
785 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
e597cd09 786 pr_err("failed setting lba address space\n");
1da177e4
LT		 787 return 1;
788 }
789
790 ret = cdrom_get_disc_info(cdi, &di);
791 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
792 return 1;
793
794 if (!di.erasable)
795 return 1;
796
797 /*
798 * mrw_status
799 * 0 - not MRW formatted
800 * 1 - MRW bgformat started, but not running or complete
801 * 2 - MRW bgformat in progress
802 * 3 - MRW formatting complete
803 */
804 ret = 0;
e597cd09 805 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
1da177e4
LT		 806 if (!di.mrw_status)
807 ret = 1;
808 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
809 mrw_format_restart)
810 ret = cdrom_mrw_bgformat(cdi, 1);
811
812 return ret;
813}
814
815static int mo_open_write(struct cdrom_device_info *cdi)
816{
817 struct packet_command cgc;
fce53847 818 char buffer[255];
1da177e4
LT		 819 int ret;
820
fce53847 821 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
1da177e4
LT		 822 cgc.quiet = 1;
823
824 /*
825 * obtain write protect information as per
826 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 */
828
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
830 if (ret)
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 if (ret) {
833 cgc.buflen = 255;
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 }
836
837 /* drive gave us no info, let the user go ahead */
fce53847
FT		 838 if (ret)
839 return 0;
1da177e4 840
fce53847 841 return buffer[3] & 0x80;
1da177e4
LT		 842}
843
844static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
845{
846 struct rwrt_feature_desc rfd;
847 int ret;
848
849 if ((ret = cdrom_has_defect_mgt(cdi)))
850 return ret;
851
852 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
853 return ret;
854 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 ret = !rfd.curr;
856
5944b2ce 857 cd_dbg(CD_OPEN, "can open for random write\n");
1da177e4
LT		 858 return ret;
859}
860
861static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
862{
863 struct packet_command cgc;
fce53847 864 char buffer[32];
1da177e4
LT		 865 int ret, mmc3_profile;
866
fce53847 867 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 868
869 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
870 cgc.cmd[1] = 0;
871 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
fce53847 872 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
1da177e4
LT		 873 cgc.quiet = 1;
874
875 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
876 mmc3_profile = 0xffff;
877 else
878 mmc3_profile = (buffer[6] << 8) | buffer[7];
879
880 cdi->mmc3_profile = mmc3_profile;
881}
882
883static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
884{
885 switch (cdi->mmc3_profile) {
886 case 0x12: /* DVD-RAM */
887 case 0x1A: /* DVD+RW */
f7e7868b 888 case 0x43: /* BD-RE */
1da177e4
LT		 889 return 0;
890 default:
891 return 1;
892 }
893}
894
895/*
896 * returns 0 for ok to open write, non-0 to disallow
897 */
898static int cdrom_open_write(struct cdrom_device_info *cdi)
899{
900 int mrw, mrw_write, ram_write;
901 int ret = 1;
902
903 mrw = 0;
904 if (!cdrom_is_mrw(cdi, &mrw_write))
905 mrw = 1;
906
907 if (CDROM_CAN(CDC_MO_DRIVE))
908 ram_write = 1;
909 else
910 (void) cdrom_is_random_writable(cdi, &ram_write);
911
912 if (mrw)
913 cdi->mask &= ~CDC_MRW;
914 else
915 cdi->mask |= CDC_MRW;
916
917 if (mrw_write)
918 cdi->mask &= ~CDC_MRW_W;
919 else
920 cdi->mask |= CDC_MRW_W;
921
922 if (ram_write)
923 cdi->mask &= ~CDC_RAM;
924 else
925 cdi->mask |= CDC_RAM;
926
927 if (CDROM_CAN(CDC_MRW_W))
928 ret = cdrom_mrw_open_write(cdi);
929 else if (CDROM_CAN(CDC_DVD_RAM))
930 ret = cdrom_dvdram_open_write(cdi);
931 else if (CDROM_CAN(CDC_RAM) &&
932 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
933 ret = cdrom_ram_open_write(cdi);
934 else if (CDROM_CAN(CDC_MO_DRIVE))
935 ret = mo_open_write(cdi);
936 else if (!cdrom_is_dvd_rw(cdi))
937 ret = 0;
938
939 return ret;
940}
941
942static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
943{
944 struct packet_command cgc;
945
946 if (cdi->mmc3_profile != 0x1a) {
5944b2ce 947 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
1da177e4
LT		 948 return;
949 }
950
951 if (!cdi->media_written) {
5944b2ce 952 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
1da177e4
LT		 953 return;
954 }
955
e597cd09 956 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
1da177e4
LT		 957
958 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
959 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
960 cgc.timeout = 30*HZ;
961 cdi->ops->generic_packet(cdi, &cgc);
962
963 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
964 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
965 cgc.timeout = 3000*HZ;
966 cgc.quiet = 1;
967 cdi->ops->generic_packet(cdi, &cgc);
968
969 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
970 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
971 cgc.cmd[2] = 2; /* Close session */
972 cgc.quiet = 1;
973 cgc.timeout = 3000*HZ;
974 cdi->ops->generic_packet(cdi, &cgc);
975
976 cdi->media_written = 0;
977}
978
979static int cdrom_close_write(struct cdrom_device_info *cdi)
980{
981#if 0
982 return cdrom_flush_cache(cdi);
983#else
984 return 0;
985#endif
986}
987
a803393b
JP		 988/* badly broken, I know. Is due for a fixup anytime. */
989static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
990{
991 struct cdrom_tochdr header;
992 struct cdrom_tocentry entry;
993 int ret, i;
994 tracks->data = 0;
995 tracks->audio = 0;
996 tracks->cdi = 0;
997 tracks->xa = 0;
998 tracks->error = 0;
999 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
1033}
1034
1da177e4 1035static
82b91540 1036int open_for_data(struct cdrom_device_info *cdi)
1da177e4
LT		 1037{
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
5944b2ce 1041 cd_dbg(CD_OPEN, "entering open_for_data\n");
1da177e4
LT		 1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1046 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1047 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1048 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1052 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
5944b2ce 1055 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1da177e4
LT		 1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
5944b2ce 1065 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1da177e4
LT		 1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce
JP		 1072 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1da177e4
LT		 1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
5944b2ce 1077 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
5944b2ce 1088 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1da177e4
LT		 1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
5944b2ce
JP		 1098 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
5944b2ce 1105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1da177e4
LT		 1106 }
1107 }
1108
5944b2ce 1109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1da177e4
LT		 1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
5944b2ce 1113 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1da177e4
LT		 1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
5944b2ce 1118 cd_dbg(CD_OPEN, "open device failed\n");
1da177e4
LT		 1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
5944b2ce 1123 cd_dbg(CD_OPEN, "door locked\n");
1da177e4 1124 }
5944b2ce 1125 cd_dbg(CD_OPEN, "device opened successfully\n");
1da177e4
LT		 1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
5944b2ce 1134 cd_dbg(CD_OPEN, "open failed\n");
1da177e4
LT		 1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
5944b2ce 1137 cd_dbg(CD_OPEN, "door unlocked\n");
1da177e4
LT		 1138 }
1139 return ret;
1140}
1141
82b91540
JP		 1142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1151 fmode_t mode)
1152{
1153 int ret;
1154
1155 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1156
1157 /* open is event synchronization point, check events first */
1158 check_disk_change(bdev);
1159
1160 /* if this was a O_NONBLOCK open and we should honor the flags,
1161 * do a quick open without drive/disc integrity checks. */
1162 cdi->use_count++;
1163 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1164 ret = cdi->ops->open(cdi, 1);
1165 } else {
1166 ret = open_for_data(cdi);
1167 if (ret)
1168 goto err;
1169 cdrom_mmc3_profile(cdi);
1170 if (mode & FMODE_WRITE) {
1171 ret = -EROFS;
1172 if (cdrom_open_write(cdi))
1173 goto err_release;
1174 if (!CDROM_CAN(CDC_RAM))
1175 goto err_release;
1176 ret = 0;
1177 cdi->media_written = 0;
1178 }
1179 }
1180
1181 if (ret)
1182 goto err;
1183
1184 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1185 cdi->name, cdi->use_count);
1186 return 0;
1187err_release:
1188 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1189 cdi->ops->lock_door(cdi, 0);
1190 cd_dbg(CD_OPEN, "door unlocked\n");
1191 }
1192 cdi->ops->release(cdi);
1193err:
1194 cdi->use_count--;
1195 return ret;
1196}
1197
1da177e4
LT		 1198/* This code is similar to that in open_for_data. The routine is called
1199 whenever an audio play operation is requested.
1200*/
ecb80c6a
AB		 1201static int check_for_audio_disc(struct cdrom_device_info * cdi,
1202 struct cdrom_device_ops * cdo)
1da177e4
LT		 1203{
1204 int ret;
1205 tracktype tracks;
5944b2ce 1206 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1da177e4
LT		 1207 if (!(cdi->options & CDO_CHECK_TYPE))
1208 return 0;
1209 if (cdo->drive_status != NULL) {
1210 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1211 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1212 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1213 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1214 /* can/may i close it? */
1215 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1216 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1217 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1218 ret=cdo->tray_move(cdi,0);
1219 if (ret) {
5944b2ce 1220 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1da177e4
LT		 1221 /* Ignore the error from the low
1222 level driver. We don't care why it
1223 couldn't close the tray. We only care
1224 that there is no disc in the drive,
1225 since that is the _REAL_ problem here.*/
1226 return -ENOMEDIUM;
1227 }
1228 } else {
5944b2ce 1229 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1da177e4
LT		 1230 return -ENOMEDIUM;
1231 }
1232 /* Ok, the door should be closed now.. Check again */
1233 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1234 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce 1235 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1da177e4
LT		 1236 return -ENOMEDIUM;
1237 }
1238 if (ret!=CDS_DISC_OK) {
5944b2ce 1239 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1da177e4
LT		 1240 return -EIO;
1241 }
5944b2ce 1242 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1243 }
1244 }
1245 cdrom_count_tracks(cdi, &tracks);
1246 if (tracks.error)
1247 return(tracks.error);
1248
1249 if (tracks.audio==0)
1250 return -EMEDIUMTYPE;
1251
1252 return 0;
1253}
1254
bbc1cc97 1255void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1da177e4
LT		 1256{
1257 struct cdrom_device_ops *cdo = cdi->ops;
1258 int opened_for_data;
1259
5944b2ce 1260 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1261
1262 if (cdi->use_count > 0)
1263 cdi->use_count--;
35841f70
BP		 1264
1265 if (cdi->use_count == 0) {
5944b2ce
JP		 1266 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1267 cdi->name);
1da177e4 1268 cdrom_dvd_rw_close_write(cdi);
35841f70 1269
cdccaa94 1270 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
5944b2ce 1271 cd_dbg(CD_CLOSE, "Unlocking door!\n");
35841f70
BP		 1272 cdo->lock_door(cdi, 0);
1273 }
1da177e4 1274 }
35841f70 1275
1da177e4 1276 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
bbc1cc97 1277 !(mode & FMODE_NDELAY);
1da177e4
LT		 1278
1279 /*
1280 * flush cache on last write release
1281 */
1282 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1283 cdrom_close_write(cdi);
1284
1285 cdo->release(cdi);
1286 if (cdi->use_count == 0) { /* last process that closes dev*/
1287 if (opened_for_data &&
1288 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1289 cdo->tray_move(cdi, 1);
1290 }
1da177e4
LT		 1291}
1292
1293static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1294 struct cdrom_changer_info *buf)
1295{
1296 struct packet_command cgc;
1297 struct cdrom_device_ops *cdo = cdi->ops;
1298 int length;
1299
1300 /*
1301 * Sanyo changer isn't spec compliant (doesn't use regular change
1302 * LOAD_UNLOAD command, and it doesn't implement the mech status
1303 * command below
1304 */
1305 if (cdi->sanyo_slot) {
1306 buf->hdr.nslots = 3;
1307 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1308 for (length = 0; length < 3; length++) {
1309 buf->slots[length].disc_present = 1;
1310 buf->slots[length].change = 0;
1311 }
1312 return 0;
1313 }
1314
1315 length = sizeof(struct cdrom_mechstat_header) +
1316 cdi->capacity * sizeof(struct cdrom_slot);
1317
1318 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1319 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1320 cgc.cmd[8] = (length >> 8) & 0xff;
1321 cgc.cmd[9] = length & 0xff;
1322 return cdo->generic_packet(cdi, &cgc);
1323}
1324
1325static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1326{
1327 struct cdrom_changer_info *info;
1328 int ret;
1329
5944b2ce 1330 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1da177e4
LT		 1331 if (cdi->sanyo_slot)
1332 return CDS_NO_INFO;
1333
1334 info = kmalloc(sizeof(*info), GFP_KERNEL);
1335 if (!info)
1336 return -ENOMEM;
1337
1338 if ((ret = cdrom_read_mech_status(cdi, info)))
1339 goto out_free;
1340
1341 if (info->slots[slot].disc_present)
1342 ret = CDS_DISC_OK;
1343 else
1344 ret = CDS_NO_DISC;
1345
1346out_free:
1347 kfree(info);
1348 return ret;
1349}
1350
1351/* Return the number of slots for an ATAPI/SCSI cdrom,
1352 * return 1 if not a changer.
1353 */
1354int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1355{
1356 int status;
1357 int nslots = 1;
1358 struct cdrom_changer_info *info;
1359
5944b2ce 1360 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1da177e4
LT		 1361 /* cdrom_read_mech_status requires a valid value for capacity: */
1362 cdi->capacity = 0;
1363
1364 info = kmalloc(sizeof(*info), GFP_KERNEL);
1365 if (!info)
1366 return -ENOMEM;
1367
1368 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1369 nslots = info->hdr.nslots;
1370
1371 kfree(info);
1372 return nslots;
1373}
1374
1375
1376/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1377static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1378{
1379 struct packet_command cgc;
1380
5944b2ce 1381 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1da177e4
LT		 1382 if (cdi->sanyo_slot && slot < 0)
1383 return 0;
1384
1385 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1386 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1387 cgc.cmd[4] = 2 + (slot >= 0);
1388 cgc.cmd[8] = slot;
1389 cgc.timeout = 60 * HZ;
1390
1391 /* The Sanyo 3 CD changer uses byte 7 of the
1392 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1393 using the GPCMD_LOAD_UNLOAD opcode. */
1394 if (cdi->sanyo_slot && -1 < slot) {
1395 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1396 cgc.cmd[7] = slot;
1397 cgc.cmd[4] = cgc.cmd[8] = 0;
1398 cdi->sanyo_slot = slot ? slot : 3;
1399 }
1400
1401 return cdi->ops->generic_packet(cdi, &cgc);
1402}
1403
1404static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1405{
1406 struct cdrom_changer_info *info;
1407 int curslot;
1408 int ret;
1409
5944b2ce 1410 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1da177e4
LT		 1411 if (!CDROM_CAN(CDC_SELECT_DISC))
1412 return -EDRIVE_CANT_DO_THIS;
1413
2d921729
TH		 1414 if (cdi->ops->check_events)
1415 cdi->ops->check_events(cdi, 0, slot);
1416 else
1417 cdi->ops->media_changed(cdi, slot);
1da177e4
LT		 1418
1419 if (slot == CDSL_NONE) {
1420 /* set media changed bits, on both queues */
1421 cdi->mc_flags = 0x3;
1422 return cdrom_load_unload(cdi, -1);
1423 }
1424
1425 info = kmalloc(sizeof(*info), GFP_KERNEL);
1426 if (!info)
1427 return -ENOMEM;
1428
1429 if ((ret = cdrom_read_mech_status(cdi, info))) {
1430 kfree(info);
1431 return ret;
1432 }
1433
1434 curslot = info->hdr.curslot;
1435 kfree(info);
1436
cdccaa94 1437 if (cdi->use_count > 1 || cdi->keeplocked) {
1da177e4
LT		 1438 if (slot == CDSL_CURRENT) {
1439 return curslot;
1440 } else {
1441 return -EBUSY;
1442 }
1443 }
1444
1445 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1446 which is useful if it had been previously unloaded.
1447 Whether it can or not, it returns the current slot.
1448 Similarly, if slot happens to be the current one, we still
1449 try and load it. */
1450 if (slot == CDSL_CURRENT)
1451 slot = curslot;
1452
1453 /* set media changed bits on both queues */
1454 cdi->mc_flags = 0x3;
1455 if ((ret = cdrom_load_unload(cdi, slot)))
1456 return ret;
1457
1458 return slot;
1459}
1460
2d921729
TH		 1461/*
1462 * As cdrom implements an extra ioctl consumer for media changed
1463 * event, it needs to buffer ->check_events() output, such that event
1464 * is not lost for both the usual VFS and ioctl paths.
1465 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1466 * path.
1467 *
1468 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1469 * called in parallel and buffering fields are accessed without any
1470 * exclusion. The original media_changed code had the same problem.
1471 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1472 * and remove this cruft altogether. It doesn't have much usefulness
1473 * at this point.
1474 */
1475static void cdrom_update_events(struct cdrom_device_info *cdi,
1476 unsigned int clearing)
1477{
1478 unsigned int events;
1479
1480 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1481 cdi->vfs_events |= events;
1482 cdi->ioctl_events |= events;
1483}
1484
1485unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1486 unsigned int clearing)
1487{
1488 unsigned int events;
1489
1490 cdrom_update_events(cdi, clearing);
1491 events = cdi->vfs_events;
1492 cdi->vfs_events = 0;
1493 return events;
1494}
30a7caab 1495EXPORT_SYMBOL(cdrom_check_events);
2d921729 1496
1da177e4
LT		 1497/* We want to make media_changed accessible to the user through an
1498 * ioctl. The main problem now is that we must double-buffer the
1499 * low-level implementation, to assure that the VFS and the user both
1500 * see a medium change once.
1501 */
1502
1503static
1504int media_changed(struct cdrom_device_info *cdi, int queue)
1505{
1506 unsigned int mask = (1 << (queue & 1));
1507 int ret = !!(cdi->mc_flags & mask);
2d921729 1508 bool changed;
1da177e4
LT		 1509
1510 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2d921729
TH		 1511 return ret;
1512
1da177e4 1513 /* changed since last call? */
2d921729
TH		 1514 if (cdi->ops->check_events) {
1515 BUG_ON(!queue); /* shouldn't be called from VFS path */
1516 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1517 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1518 cdi->ioctl_events = 0;
1519 } else
1520 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1521
1522 if (changed) {
1da177e4
LT		 1523 cdi->mc_flags = 0x3; /* set bit on both queues */
1524 ret |= 1;
1525 cdi->media_written = 0;
1526 }
2d921729 1527
1da177e4
LT		 1528 cdi->mc_flags &= ~mask; /* clear bit */
1529 return ret;
1530}
1531
1532int cdrom_media_changed(struct cdrom_device_info *cdi)
1533{
1534 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1535 * Returning "0" is always safe (media hasn't been changed). Do that
1536 * if the low-level cdrom driver dosn't support media changed. */
1537 if (cdi == NULL || cdi->ops->media_changed == NULL)
1538 return 0;
1539 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1540 return 0;
1541 return media_changed(cdi, 0);
1542}
1543
1da177e4
LT		 1544/* Requests to the low-level drivers will /always/ be done in the
1545 following format convention:
1546
1547 CDROM_LBA: all data-related requests.
1548 CDROM_MSF: all audio-related requests.
1549
1550 However, a low-level implementation is allowed to refuse this
1551 request, and return information in its own favorite format.
1552
1553 It doesn't make sense /at all/ to ask for a play_audio in LBA
1554 format, or ask for multi-session info in MSF format. However, for
1555 backward compatibility these format requests will be satisfied, but
1556 the requests to the low-level drivers will be sanitized in the more
1557 meaningful format indicated above.
1558 */
1559
1560static
1561void sanitize_format(union cdrom_addr *addr,
1562 u_char * curr, u_char requested)
1563{
1564 if (*curr == requested)
1565 return; /* nothing to be done! */
1566 if (requested == CDROM_LBA) {
1567 addr->lba = (int) addr->msf.frame +
1568 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1569 } else { /* CDROM_MSF */
1570 int lba = addr->lba;
1571 addr->msf.frame = lba % 75;
1572 lba /= 75;
1573 lba += 2;
1574 addr->msf.second = lba % 60;
1575 addr->msf.minute = lba / 60;
1576 }
1577 *curr = requested;
1578}
1579
1580void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1581 int type)
1582{
1583 memset(cgc, 0, sizeof(struct packet_command));
1584 if (buf)
1585 memset(buf, 0, len);
1586 cgc->buffer = (char *) buf;
1587 cgc->buflen = len;
1588 cgc->data_direction = type;
2e11c207 1589 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1590}
1591
1592/* DVD handling */
1593
1594#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1595#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1596
1597static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1598{
1599 cgc->cmd[0] = GPCMD_REPORT_KEY;
1600 cgc->cmd[10] = type | (agid << 6);
1601 switch (type) {
1602 case 0: case 8: case 5: {
1603 cgc->buflen = 8;
1604 break;
1605 }
1606 case 1: {
1607 cgc->buflen = 16;
1608 break;
1609 }
1610 case 2: case 4: {
1611 cgc->buflen = 12;
1612 break;
1613 }
1614 }
1615 cgc->cmd[9] = cgc->buflen;
1616 cgc->data_direction = CGC_DATA_READ;
1617}
1618
1619static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1620{
1621 cgc->cmd[0] = GPCMD_SEND_KEY;
1622 cgc->cmd[10] = type | (agid << 6);
1623 switch (type) {
1624 case 1: {
1625 cgc->buflen = 16;
1626 break;
1627 }
1628 case 3: {
1629 cgc->buflen = 12;
1630 break;
1631 }
1632 case 6: {
1633 cgc->buflen = 8;
1634 break;
1635 }
1636 }
1637 cgc->cmd[9] = cgc->buflen;
1638 cgc->data_direction = CGC_DATA_WRITE;
1639}
1640
1641static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1642{
1643 int ret;
fce53847 1644 u_char buf[20];
1da177e4
LT		 1645 struct packet_command cgc;
1646 struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1647 rpc_state_t rpc_state;
1da177e4 1648
fce53847 1649 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1650 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1651
1652 switch (ai->type) {
1653 /* LU data send */
1654 case DVD_LU_SEND_AGID:
5944b2ce 1655 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1da177e4
LT		 1656 cgc.quiet = 1;
1657 setup_report_key(&cgc, ai->lsa.agid, 0);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1660 return ret;
1da177e4
LT		 1661
1662 ai->lsa.agid = buf[7] >> 6;
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_KEY1:
5944b2ce 1667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1da177e4
LT		 1668 setup_report_key(&cgc, ai->lsk.agid, 2);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1671 return ret;
1da177e4
LT		 1672
1673 copy_key(ai->lsk.key, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 case DVD_LU_SEND_CHALLENGE:
5944b2ce 1678 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1da177e4
LT		 1679 setup_report_key(&cgc, ai->lsc.agid, 1);
1680
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1682 return ret;
1da177e4
LT		 1683
1684 copy_chal(ai->lsc.chal, &buf[4]);
1685 /* Returning data, let host change state */
1686 break;
1687
1688 /* Post-auth key */
1689 case DVD_LU_SEND_TITLE_KEY:
5944b2ce 1690 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1da177e4
LT		 1691 cgc.quiet = 1;
1692 setup_report_key(&cgc, ai->lstk.agid, 4);
1693 cgc.cmd[5] = ai->lstk.lba;
1694 cgc.cmd[4] = ai->lstk.lba >> 8;
1695 cgc.cmd[3] = ai->lstk.lba >> 16;
1696 cgc.cmd[2] = ai->lstk.lba >> 24;
1697
1698 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1699 return ret;
1da177e4
LT		 1700
1701 ai->lstk.cpm = (buf[4] >> 7) & 1;
1702 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1703 ai->lstk.cgms = (buf[4] >> 4) & 3;
1704 copy_key(ai->lstk.title_key, &buf[5]);
1705 /* Returning data, let host change state */
1706 break;
1707
1708 case DVD_LU_SEND_ASF:
5944b2ce 1709 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1da177e4
LT		 1710 setup_report_key(&cgc, ai->lsasf.agid, 5);
1711
1712 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1713 return ret;
1da177e4
LT		 1714
1715 ai->lsasf.asf = buf[7] & 1;
1716 break;
1717
1718 /* LU data receive (LU changes state) */
1719 case DVD_HOST_SEND_CHALLENGE:
5944b2ce 1720 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1da177e4
LT		 1721 setup_send_key(&cgc, ai->hsc.agid, 1);
1722 buf[1] = 0xe;
1723 copy_chal(&buf[4], ai->hsc.chal);
1724
1725 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1726 return ret;
1da177e4
LT		 1727
1728 ai->type = DVD_LU_SEND_KEY1;
1729 break;
1730
1731 case DVD_HOST_SEND_KEY2:
5944b2ce 1732 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1da177e4
LT		 1733 setup_send_key(&cgc, ai->hsk.agid, 3);
1734 buf[1] = 0xa;
1735 copy_key(&buf[4], ai->hsk.key);
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1738 ai->type = DVD_AUTH_FAILURE;
fce53847 1739 return ret;
1da177e4
LT		 1740 }
1741 ai->type = DVD_AUTH_ESTABLISHED;
1742 break;
1743
1744 /* Misc */
1745 case DVD_INVALIDATE_AGID:
1746 cgc.quiet = 1;
5944b2ce 1747 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1da177e4
LT		 1748 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1750 return ret;
1da177e4
LT		 1751 break;
1752
1753 /* Get region settings */
1754 case DVD_LU_SEND_RPC_STATE:
5944b2ce 1755 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1da177e4 1756 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1757 memset(&rpc_state, 0, sizeof(rpc_state_t));
1758 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1759
1760 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1761 return ret;
1da177e4 1762
fce53847
FT		 1763 ai->lrpcs.type = rpc_state.type_code;
1764 ai->lrpcs.vra = rpc_state.vra;
1765 ai->lrpcs.ucca = rpc_state.ucca;
1766 ai->lrpcs.region_mask = rpc_state.region_mask;
1767 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1768 break;
1769
1770 /* Set region settings */
1771 case DVD_HOST_SEND_RPC_STATE:
5944b2ce 1772 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1da177e4
LT		 1773 setup_send_key(&cgc, 0, 6);
1774 buf[1] = 6;
1775 buf[4] = ai->hrpcs.pdrc;
1776
1777 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1778 return ret;
1da177e4
LT		 1779 break;
1780
1781 default:
5944b2ce 1782 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1783 return -ENOTTY;
1da177e4 1784 }
fce53847
FT		 1785
1786 return 0;
1da177e4
LT		 1787}
1788
d194139c
MS		 1789static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1790 struct packet_command *cgc)
1da177e4 1791{
fce53847 1792 unsigned char buf[21], *base;
1da177e4 1793 struct dvd_layer *layer;
1da177e4
LT		 1794 struct cdrom_device_ops *cdo = cdi->ops;
1795 int ret, layer_num = s->physical.layer_num;
1796
1797 if (layer_num >= DVD_LAYERS)
1798 return -EINVAL;
1799
d194139c
MS		 1800 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1801 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc->cmd[6] = layer_num;
1803 cgc->cmd[7] = s->type;
1804 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4
LT		 1805
1806 /*
1807 * refrain from reporting errors on non-existing layers (mainly)
1808 */
d194139c 1809 cgc->quiet = 1;
1da177e4 1810
d194139c
MS		 1811 ret = cdo->generic_packet(cdi, cgc);
1812 if (ret)
fce53847 1813 return ret;
1da177e4
LT		 1814
1815 base = &buf[4];
1816 layer = &s->physical.layer[layer_num];
1817
1818 /*
1819 * place the data... really ugly, but at least we won't have to
1820 * worry about endianess in userspace.
1821 */
1822 memset(layer, 0, sizeof(*layer));
1823 layer->book_version = base[0] & 0xf;
1824 layer->book_type = base[0] >> 4;
1825 layer->min_rate = base[1] & 0xf;
1826 layer->disc_size = base[1] >> 4;
1827 layer->layer_type = base[2] & 0xf;
1828 layer->track_path = (base[2] >> 4) & 1;
1829 layer->nlayers = (base[2] >> 5) & 3;
1830 layer->track_density = base[3] & 0xf;
1831 layer->linear_density = base[3] >> 4;
1832 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1833 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1834 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1835 layer->bca = base[16] >> 7;
1836
fce53847 1837 return 0;
1da177e4
LT		 1838}
1839
d194139c
MS		 1840static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1841 struct packet_command *cgc)
1da177e4
LT		 1842{
1843 int ret;
fce53847 1844 u_char buf[8];
1da177e4
LT		 1845 struct cdrom_device_ops *cdo = cdi->ops;
1846
d194139c
MS		 1847 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1848 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1849 cgc->cmd[6] = s->copyright.layer_num;
1850 cgc->cmd[7] = s->type;
1851 cgc->cmd[8] = cgc->buflen >> 8;
1852 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4 1853
d194139c
MS		 1854 ret = cdo->generic_packet(cdi, cgc);
1855 if (ret)
fce53847 1856 return ret;
1da177e4
LT		 1857
1858 s->copyright.cpst = buf[4];
1859 s->copyright.rmi = buf[5];
1860
fce53847 1861 return 0;
1da177e4
LT		 1862}
1863
d194139c
MS		 1864static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1865 struct packet_command *cgc)
1da177e4
LT		 1866{
1867 int ret, size;
1868 u_char *buf;
1da177e4
LT		 1869 struct cdrom_device_ops *cdo = cdi->ops;
1870
1871 size = sizeof(s->disckey.value) + 4;
1872
d194139c
MS		 1873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
1da177e4
LT		 1875 return -ENOMEM;
1876
d194139c
MS		 1877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[8] = size >> 8;
1881 cgc->cmd[9] = size & 0xff;
1882 cgc->cmd[10] = s->disckey.agid << 6;
1da177e4 1883
d194139c
MS		 1884 ret = cdo->generic_packet(cdi, cgc);
1885 if (!ret)
1da177e4
LT		 1886 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1887
1888 kfree(buf);
1889 return ret;
1890}
1891
d194139c
MS		 1892static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1893 struct packet_command *cgc)
1da177e4 1894{
d194139c
MS		 1895 int ret, size = 4 + 188;
1896 u_char *buf;
1da177e4
LT		 1897 struct cdrom_device_ops *cdo = cdi->ops;
1898
d194139c
MS		 1899 buf = kmalloc(size, GFP_KERNEL);
1900 if (!buf)
1901 return -ENOMEM;
1da177e4 1902
d194139c
MS		 1903 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1904 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1905 cgc->cmd[7] = s->type;
1906 cgc->cmd[9] = cgc->buflen & 0xff;
1907
1908 ret = cdo->generic_packet(cdi, cgc);
1909 if (ret)
1910 goto out;
1da177e4
LT		 1911
1912 s->bca.len = buf[0] << 8 | buf[1];
1913 if (s->bca.len < 12 || s->bca.len > 188) {
5944b2ce
JP		 1914 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1915 s->bca.len);
d194139c
MS		 1916 ret = -EIO;
1917 goto out;
1da177e4
LT		 1918 }
1919 memcpy(s->bca.value, &buf[4], s->bca.len);
d194139c
MS		 1920 ret = 0;
1921out:
1922 kfree(buf);
1923 return ret;
1da177e4
LT		 1924}
1925
d194139c
MS		 1926static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1927 struct packet_command *cgc)
1da177e4
LT		 1928{
1929 int ret = 0, size;
1930 u_char *buf;
1da177e4
LT		 1931 struct cdrom_device_ops *cdo = cdi->ops;
1932
1933 size = sizeof(s->manufact.value) + 4;
1934
d194139c
MS		 1935 buf = kmalloc(size, GFP_KERNEL);
1936 if (!buf)
1da177e4
LT		 1937 return -ENOMEM;
1938
d194139c
MS		 1939 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1940 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1941 cgc->cmd[7] = s->type;
1942 cgc->cmd[8] = size >> 8;
1943 cgc->cmd[9] = size & 0xff;
1da177e4 1944
d194139c
MS		 1945 ret = cdo->generic_packet(cdi, cgc);
1946 if (ret)
1947 goto out;
1da177e4
LT		 1948
1949 s->manufact.len = buf[0] << 8 | buf[1];
aec9f377 1950 if (s->manufact.len < 0) {
5944b2ce
JP		 1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1952 s->manufact.len);
1da177e4
LT		 1953 ret = -EIO;
1954 } else {
aec9f377 1955 if (s->manufact.len > 2048) {
5944b2ce
JP		 1956 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1957 s->manufact.len);
aec9f377
AM		 1958 s->manufact.len = 2048;
1959 }
1da177e4
LT		 1960 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1961 }
1962
d194139c 1963out:
1da177e4
LT		 1964 kfree(buf);
1965 return ret;
1966}
1967
d194139c
MS		 1968static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1969 struct packet_command *cgc)
1da177e4
LT		 1970{
1971 switch (s->type) {
1972 case DVD_STRUCT_PHYSICAL:
d194139c 1973 return dvd_read_physical(cdi, s, cgc);
1da177e4
LT		 1974
1975 case DVD_STRUCT_COPYRIGHT:
d194139c 1976 return dvd_read_copyright(cdi, s, cgc);
1da177e4
LT		 1977
1978 case DVD_STRUCT_DISCKEY:
d194139c 1979 return dvd_read_disckey(cdi, s, cgc);
1da177e4
LT		 1980
1981 case DVD_STRUCT_BCA:
d194139c 1982 return dvd_read_bca(cdi, s, cgc);
1da177e4
LT		 1983
1984 case DVD_STRUCT_MANUFACT:
d194139c 1985 return dvd_read_manufact(cdi, s, cgc);
1da177e4
LT		 1986
1987 default:
5944b2ce
JP		 1988 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1989 s->type);
1da177e4
LT		 1990 return -EINVAL;
1991 }
1992}
1993
1994int cdrom_mode_sense(struct cdrom_device_info *cdi,
1995 struct packet_command *cgc,
1996 int page_code, int page_control)
1997{
1998 struct cdrom_device_ops *cdo = cdi->ops;
1999
2000 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2001
2002 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2003 cgc->cmd[2] = page_code | (page_control << 6);
2004 cgc->cmd[7] = cgc->buflen >> 8;
2005 cgc->cmd[8] = cgc->buflen & 0xff;
2006 cgc->data_direction = CGC_DATA_READ;
2007 return cdo->generic_packet(cdi, cgc);
2008}
2009
2010int cdrom_mode_select(struct cdrom_device_info *cdi,
2011 struct packet_command *cgc)
2012{
2013 struct cdrom_device_ops *cdo = cdi->ops;
2014
2015 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2016 memset(cgc->buffer, 0, 2);
2017 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2018 cgc->cmd[1] = 0x10; /* PF */
2019 cgc->cmd[7] = cgc->buflen >> 8;
2020 cgc->cmd[8] = cgc->buflen & 0xff;
2021 cgc->data_direction = CGC_DATA_WRITE;
2022 return cdo->generic_packet(cdi, cgc);
2023}
2024
2025static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2026 struct cdrom_subchnl *subchnl, int mcn)
2027{
2028 struct cdrom_device_ops *cdo = cdi->ops;
2029 struct packet_command cgc;
fce53847 2030 char buffer[32];
1da177e4
LT		 2031 int ret;
2032
2033 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2034 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2035 cgc.cmd[1] = 2; /* MSF addressing */
2036 cgc.cmd[2] = 0x40; /* request subQ data */
2037 cgc.cmd[3] = mcn ? 2 : 1;
2038 cgc.cmd[8] = 16;
2039
2040 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 2041 return ret;
1da177e4
LT		 2042
2043 subchnl->cdsc_audiostatus = cgc.buffer[1];
2044 subchnl->cdsc_format = CDROM_MSF;
2045 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2046 subchnl->cdsc_trk = cgc.buffer[6];
2047 subchnl->cdsc_ind = cgc.buffer[7];
2048
2049 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2050 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2051 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2052 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2053 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2054 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2055
fce53847 2056 return 0;
1da177e4
LT		 2057}
2058
2059/*
2060 * Specific READ_10 interface
2061 */
2062static int cdrom_read_cd(struct cdrom_device_info *cdi,
2063 struct packet_command *cgc, int lba,
2064 int blocksize, int nblocks)
2065{
2066 struct cdrom_device_ops *cdo = cdi->ops;
2067
2068 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2069 cgc->cmd[0] = GPCMD_READ_10;
2070 cgc->cmd[2] = (lba >> 24) & 0xff;
2071 cgc->cmd[3] = (lba >> 16) & 0xff;
2072 cgc->cmd[4] = (lba >> 8) & 0xff;
2073 cgc->cmd[5] = lba & 0xff;
2074 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2075 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2076 cgc->cmd[8] = nblocks & 0xff;
2077 cgc->buflen = blocksize * nblocks;
2078 return cdo->generic_packet(cdi, cgc);
2079}
2080
2081/* very generic interface for reading the various types of blocks */
2082static int cdrom_read_block(struct cdrom_device_info *cdi,
2083 struct packet_command *cgc,
2084 int lba, int nblocks, int format, int blksize)
2085{
2086 struct cdrom_device_ops *cdo = cdi->ops;
2087
2088 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2089 cgc->cmd[0] = GPCMD_READ_CD;
2090 /* expected sector size - cdda,mode1,etc. */
2091 cgc->cmd[1] = format << 2;
2092 /* starting address */
2093 cgc->cmd[2] = (lba >> 24) & 0xff;
2094 cgc->cmd[3] = (lba >> 16) & 0xff;
2095 cgc->cmd[4] = (lba >> 8) & 0xff;
2096 cgc->cmd[5] = lba & 0xff;
2097 /* number of blocks */
2098 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2099 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2100 cgc->cmd[8] = nblocks & 0xff;
2101 cgc->buflen = blksize * nblocks;
2102
2103 /* set the header info returned */
2104 switch (blksize) {
2105 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2106 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2107 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2108 default : cgc->cmd[9] = 0x10;
2109 }
2110
2111 return cdo->generic_packet(cdi, cgc);
2112}
2113
2114static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2115 int lba, int nframes)
2116{
2117 struct packet_command cgc;
2118 int ret = 0;
2119 int nr;
2120
2121 cdi->last_sense = 0;
2122
2123 memset(&cgc, 0, sizeof(cgc));
2124
2125 /*
2126 * start with will ra.nframes size, back down if alloc fails
2127 */
2128 nr = nframes;
2129 do {
2130 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2131 if (cgc.buffer)
2132 break;
2133
2134 nr >>= 1;
2135 } while (nr);
2136
2137 if (!nr)
2138 return -ENOMEM;
2139
1da177e4
LT		 2140 cgc.data_direction = CGC_DATA_READ;
2141 while (nframes > 0) {
2142 if (nr > nframes)
2143 nr = nframes;
2144
2145 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2146 if (ret)
2147 break;
822bfa51 2148 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
1da177e4
LT		 2149 ret = -EFAULT;
2150 break;
2151 }
2152 ubuf += CD_FRAMESIZE_RAW * nr;
2153 nframes -= nr;
2154 lba += nr;
2155 }
1da177e4
LT		 2156 kfree(cgc.buffer);
2157 return ret;
2158}
2159
2160static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2161 int lba, int nframes)
2162{
165125e1 2163 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2164 struct request *rq;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 cdi->last_sense = 0;
2173
2174 while (nframes) {
2175 nr = nframes;
2176 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2177 nr = 1;
ae03bf63
MP		 2178 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2179 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
1da177e4
LT		 2180
2181 len = nr * CD_FRAMESIZE_RAW;
2182
febd7a5c 2183 rq = blk_get_request(q, READ, GFP_KERNEL);
a492f075
JL		 2184 if (IS_ERR(rq)) {
2185 ret = PTR_ERR(rq);
febd7a5c
AB		 2186 break;
2187 }
f27b087b 2188 blk_rq_set_block_pc(rq);
febd7a5c 2189
152e283f 2190 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2191 if (ret) {
2192 blk_put_request(rq);
dd1cab95 2193 break;
febd7a5c 2194 }
1da177e4 2195
1da177e4
LT		 2196 rq->cmd[0] = GPCMD_READ_CD;
2197 rq->cmd[1] = 1 << 2;
2198 rq->cmd[2] = (lba >> 24) & 0xff;
2199 rq->cmd[3] = (lba >> 16) & 0xff;
2200 rq->cmd[4] = (lba >> 8) & 0xff;
2201 rq->cmd[5] = lba & 0xff;
2202 rq->cmd[6] = (nr >> 16) & 0xff;
2203 rq->cmd[7] = (nr >> 8) & 0xff;
2204 rq->cmd[8] = nr & 0xff;
2205 rq->cmd[9] = 0xf8;
2206
2207 rq->cmd_len = 12;
1da177e4
LT		 2208 rq->timeout = 60 * HZ;
2209 bio = rq->bio;
2210
994ca9a1 2211 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2212 struct request_sense *s = rq->sense;
2213 ret = -EIO;
2214 cdi->last_sense = s->sense_key;
2215 }
2216
8e5cfc45 2217 if (blk_rq_unmap_user(bio))
1da177e4 2218 ret = -EFAULT;
febd7a5c 2219 blk_put_request(rq);
1da177e4
LT		 2220
2221 if (ret)
2222 break;
2223
2224 nframes -= nr;
2225 lba += nr;
2226 ubuf += len;
2227 }
2228
2229 return ret;
2230}
2231
2232static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2233 int lba, int nframes)
2234{
2235 int ret;
2236
2237 if (cdi->cdda_method == CDDA_OLD)
2238 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2239
2240retry:
2241 /*
2242 * for anything else than success and io error, we need to retry
2243 */
2244 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2245 if (!ret || ret != -EIO)
2246 return ret;
2247
2248 /*
2249 * I've seen drives get sense 4/8/3 udma crc errors on multi
2250 * frame dma, so drop to single frame dma if we need to
2251 */
2252 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
e597cd09 2253 pr_info("dropping to single frame dma\n");
1da177e4
LT		 2254 cdi->cdda_method = CDDA_BPC_SINGLE;
2255 goto retry;
2256 }
2257
2258 /*
2259 * so we have an io error of some sort with multi frame dma. if the
2260 * condition wasn't a hardware error
2261 * problems, not for any error
2262 */
2263 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2264 return ret;
2265
e597cd09 2266 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
1da177e4
LT		 2267 cdi->cdda_method = CDDA_OLD;
2268 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2269}
2270
d2c5d4fc
CH		 2271static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2272 void __user *argp)
1da177e4 2273{
d2c5d4fc
CH		 2274 struct cdrom_multisession ms_info;
2275 u8 requested_format;
1da177e4
LT		 2276 int ret;
2277
5944b2ce 2278 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
d2c5d4fc
CH		 2279
2280 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2281 return -ENOSYS;
2282
2283 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2284 return -EFAULT;
2285
2286 requested_format = ms_info.addr_format;
2287 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2288 return -EINVAL;
2289 ms_info.addr_format = CDROM_LBA;
2290
2291 ret = cdi->ops->get_last_session(cdi, &ms_info);
2292 if (ret)
1da177e4
LT		 2293 return ret;
2294
d2c5d4fc
CH		 2295 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2296
2297 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2298 return -EFAULT;
2299
5944b2ce 2300 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
d2c5d4fc
CH		 2301 return 0;
2302}
2303
2304static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2305{
5944b2ce 2306 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
d2c5d4fc
CH		 2307
2308 if (!CDROM_CAN(CDC_OPEN_TRAY))
2309 return -ENOSYS;
cdccaa94 2310 if (cdi->use_count != 1 || cdi->keeplocked)
d2c5d4fc
CH		 2311 return -EBUSY;
2312 if (CDROM_CAN(CDC_LOCK)) {
2313 int ret = cdi->ops->lock_door(cdi, 0);
2314 if (ret)
1da177e4 2315 return ret;
d2c5d4fc 2316 }
1da177e4 2317
d2c5d4fc
CH		 2318 return cdi->ops->tray_move(cdi, 1);
2319}
1da177e4 2320
d2c5d4fc
CH		 2321static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2322{
5944b2ce 2323 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2324
d2c5d4fc
CH		 2325 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2326 return -ENOSYS;
2327 return cdi->ops->tray_move(cdi, 0);
2328}
1da177e4 2329
d2c5d4fc
CH		 2330static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2331 unsigned long arg)
2332{
5944b2ce 2333 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2334
d2c5d4fc
CH		 2335 if (!CDROM_CAN(CDC_OPEN_TRAY))
2336 return -ENOSYS;
cdccaa94 2337 if (cdi->keeplocked)
d2c5d4fc 2338 return -EBUSY;
1da177e4 2339
d2c5d4fc
CH		 2340 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2341 if (arg)
2342 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2343 return 0;
2344}
1da177e4 2345
d2c5d4fc
CH		 2346static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
2349 struct cdrom_changer_info *info;
2350 int ret;
1da177e4 2351
5944b2ce 2352 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2353
d2c5d4fc
CH		 2354 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2355 return -ENOSYS;
1da177e4 2356
d2c5d4fc
CH		 2357 /* cannot select disc or select current disc */
2358 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2359 return media_changed(cdi, 1);
1da177e4 2360
d2c5d4fc
CH		 2361 if ((unsigned int)arg >= cdi->capacity)
2362 return -EINVAL;
1da177e4 2363
d2c5d4fc
CH		 2364 info = kmalloc(sizeof(*info), GFP_KERNEL);
2365 if (!info)
2366 return -ENOMEM;
1da177e4 2367
d2c5d4fc
CH		 2368 ret = cdrom_read_mech_status(cdi, info);
2369 if (!ret)
2370 ret = info->slots[arg].change;
2371 kfree(info);
2372 return ret;
2373}
1da177e4 2374
d2c5d4fc
CH		 2375static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2376 unsigned long arg)
2377{
5944b2ce 2378 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2379
d2c5d4fc
CH		 2380 /*
2381 * Options need to be in sync with capability.
2382 * Too late for that, so we have to check each one separately.
2383 */
2384 switch (arg) {
2385 case CDO_USE_FFLAGS:
2386 case CDO_CHECK_TYPE:
2387 break;
2388 case CDO_LOCK:
2389 if (!CDROM_CAN(CDC_LOCK))
2390 return -ENOSYS;
2391 break;
2392 case 0:
2393 return cdi->options;
2394 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2395 default:
2396 if (!CDROM_CAN(arg))
1da177e4 2397 return -ENOSYS;
d2c5d4fc
CH		 2398 }
2399 cdi->options |= (int) arg;
2400 return cdi->options;
2401}
1da177e4 2402
d2c5d4fc
CH		 2403static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2404 unsigned long arg)
2405{
5944b2ce 2406 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2407
d2c5d4fc
CH		 2408 cdi->options &= ~(int) arg;
2409 return cdi->options;
2410}
1da177e4 2411
d2c5d4fc
CH		 2412static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2413 unsigned long arg)
2414{
5944b2ce 2415 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2416
d2c5d4fc
CH		 2417 if (!CDROM_CAN(CDC_SELECT_SPEED))
2418 return -ENOSYS;
2419 return cdi->ops->select_speed(cdi, arg);
2420}
1da177e4 2421
d2c5d4fc
CH		 2422static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
5944b2ce 2425 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
d2c5d4fc
CH		 2426
2427 if (!CDROM_CAN(CDC_SELECT_DISC))
2428 return -ENOSYS;
2429
2430 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2431 if ((int)arg >= cdi->capacity)
2432 return -EINVAL;
2433 }
2434
2435 /*
2436 * ->select_disc is a hook to allow a driver-specific way of
2437 * seleting disc. However, since there is no equivalent hook for
2438 * cdrom_slot_status this may not actually be useful...
2439 */
2440 if (cdi->ops->select_disc)
2441 return cdi->ops->select_disc(cdi, arg);
2442
5944b2ce 2443 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
d2c5d4fc
CH		 2444 return cdrom_select_disc(cdi, arg);
2445}
2446
2447static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2448 struct block_device *bdev)
2449{
5944b2ce 2450 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
d2c5d4fc
CH		 2451
2452 if (!capable(CAP_SYS_ADMIN))
2453 return -EACCES;
2454 if (!CDROM_CAN(CDC_RESET))
2455 return -ENOSYS;
f98393a6 2456 invalidate_bdev(bdev);
d2c5d4fc
CH		 2457 return cdi->ops->reset(cdi);
2458}
2459
2460static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2461 unsigned long arg)
2462{
5944b2ce 2463 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
d2c5d4fc
CH		 2464
2465 if (!CDROM_CAN(CDC_LOCK))
2466 return -EDRIVE_CANT_DO_THIS;
2467
cdccaa94 2468 cdi->keeplocked = arg ? 1 : 0;
d2c5d4fc
CH		 2469
2470 /*
2471 * Don't unlock the door on multiple opens by default, but allow
2472 * root to do so.
2473 */
2474 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2475 return -EBUSY;
2476 return cdi->ops->lock_door(cdi, arg);
2477}
2478
2479static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
5944b2ce 2482 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
d2c5d4fc
CH		 2483
2484 if (!capable(CAP_SYS_ADMIN))
2485 return -EACCES;
2486 debug = arg ? 1 : 0;
2487 return debug;
2488}
1da177e4 2489
d2c5d4fc
CH		 2490static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2491{
5944b2ce 2492 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
d2c5d4fc
CH		 2493 return (cdi->ops->capability & ~cdi->mask);
2494}
2495
2496/*
2497 * The following function is implemented, although very few audio
1da177e4
LT		 2498 * discs give Universal Product Code information, which should just be
2499 * the Medium Catalog Number on the box. Note, that the way the code
2500 * is written on the CD is /not/ uniform across all discs!
2501 */
d2c5d4fc
CH		 2502static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2503 void __user *argp)
2504{
2505 struct cdrom_mcn mcn;
2506 int ret;
1da177e4 2507
5944b2ce 2508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2509
d2c5d4fc
CH		 2510 if (!(cdi->ops->capability & CDC_MCN))
2511 return -ENOSYS;
2512 ret = cdi->ops->get_mcn(cdi, &mcn);
2513 if (ret)
2514 return ret;
1da177e4 2515
d2c5d4fc
CH		 2516 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2517 return -EFAULT;
5944b2ce 2518 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
d2c5d4fc
CH		 2519 return 0;
2520}
1da177e4 2521
d2c5d4fc
CH		 2522static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2523 unsigned long arg)
2524{
5944b2ce 2525 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
d2c5d4fc
CH		 2526
2527 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2528 return -ENOSYS;
2529 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2530 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2531 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2532 if (((int)arg >= cdi->capacity))
2533 return -EINVAL;
2534 return cdrom_slot_status(cdi, arg);
2535}
2536
2537/*
2538 * Ok, this is where problems start. The current interface for the
2539 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
25985edc 2540 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
d2c5d4fc
CH		 2541 * is often the case, it is also very common for CDs to have some tracks
2542 * with data, and some tracks with audio. Just because I feel like it,
2543 * I declare the following to be the best way to cope. If the CD has ANY
2544 * data tracks on it, it will be returned as a data CD. If it has any XA
2545 * tracks, I will return it as that. Now I could simplify this interface
2546 * by combining these returns with the above, but this more clearly
2547 * demonstrates the problem with the current interface. Too bad this
2548 * wasn't designed to use bitmasks... -Erik
2549 *
2550 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2551 * User level programmers might feel the ioctl is not very useful.
2552 * ---david
2553 */
2554static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2555{
2556 tracktype tracks;
2557
5944b2ce 2558 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
d2c5d4fc
CH		 2559
2560 cdrom_count_tracks(cdi, &tracks);
2561 if (tracks.error)
2562 return tracks.error;
2563
2564 /* Policy mode on */
2565 if (tracks.audio > 0) {
2566 if (!tracks.data && !tracks.cdi && !tracks.xa)
2567 return CDS_AUDIO;
2568 else
2569 return CDS_MIXED;
1da177e4
LT		 2570 }
2571
d2c5d4fc
CH		 2572 if (tracks.cdi > 0)
2573 return CDS_XA_2_2;
2574 if (tracks.xa > 0)
2575 return CDS_XA_2_1;
2576 if (tracks.data > 0)
2577 return CDS_DATA_1;
2578 /* Policy mode off */
2579
5944b2ce 2580 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
d2c5d4fc
CH		 2581 return CDS_NO_INFO;
2582}
2583
2584static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2585{
5944b2ce 2586 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
d2c5d4fc
CH		 2587 return cdi->capacity;
2588}
2589
2590static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592{
2593 struct cdrom_subchnl q;
2594 u8 requested, back;
2595 int ret;
2596
5944b2ce 2597 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
d2c5d4fc 2598
d2c5d4fc
CH		 2599 if (copy_from_user(&q, argp, sizeof(q)))
2600 return -EFAULT;
2601
2602 requested = q.cdsc_format;
2603 if (requested != CDROM_MSF && requested != CDROM_LBA)
2604 return -EINVAL;
2605 q.cdsc_format = CDROM_MSF;
2606
2607 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2608 if (ret)
2609 return ret;
2610
2611 back = q.cdsc_format; /* local copy */
2612 sanitize_format(&q.cdsc_absaddr, &back, requested);
2613 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2614
2615 if (copy_to_user(argp, &q, sizeof(q)))
2616 return -EFAULT;
5944b2ce 2617 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
d2c5d4fc
CH		 2618 return 0;
2619}
2620
2621static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2622 void __user *argp)
2623{
2624 struct cdrom_tochdr header;
2625 int ret;
2626
5944b2ce 2627 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
d2c5d4fc 2628
d2c5d4fc
CH		 2629 if (copy_from_user(&header, argp, sizeof(header)))
2630 return -EFAULT;
2631
2632 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2633 if (ret)
2634 return ret;
2635
2636 if (copy_to_user(argp, &header, sizeof(header)))
2637 return -EFAULT;
5944b2ce 2638 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
d2c5d4fc
CH		 2639 return 0;
2640}
2641
2642static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2643 void __user *argp)
2644{
2645 struct cdrom_tocentry entry;
2646 u8 requested_format;
2647 int ret;
2648
5944b2ce 2649 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
d2c5d4fc 2650
d2c5d4fc
CH		 2651 if (copy_from_user(&entry, argp, sizeof(entry)))
2652 return -EFAULT;
2653
2654 requested_format = entry.cdte_format;
2655 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2656 return -EINVAL;
2657 /* make interface to low-level uniform */
2658 entry.cdte_format = CDROM_MSF;
2659 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2660 if (ret)
2661 return ret;
2662 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2663
2664 if (copy_to_user(argp, &entry, sizeof(entry)))
2665 return -EFAULT;
5944b2ce 2666 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
d2c5d4fc
CH		 2667 return 0;
2668}
2669
2670static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2671 void __user *argp)
2672{
2673 struct cdrom_msf msf;
2674
5944b2ce 2675 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
d2c5d4fc
CH		 2676
2677 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2678 return -ENOSYS;
2679 if (copy_from_user(&msf, argp, sizeof(msf)))
2680 return -EFAULT;
2681 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2682}
2683
2684static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2685 void __user *argp)
2686{
2687 struct cdrom_ti ti;
2688 int ret;
2689
5944b2ce 2690 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
d2c5d4fc
CH		 2691
2692 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2693 return -ENOSYS;
2694 if (copy_from_user(&ti, argp, sizeof(ti)))
2695 return -EFAULT;
2696
2697 ret = check_for_audio_disc(cdi, cdi->ops);
2698 if (ret)
2699 return ret;
2700 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2701}
2702static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2703 void __user *argp)
2704{
2705 struct cdrom_volctrl volume;
2706
5944b2ce 2707 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
d2c5d4fc
CH		 2708
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710 return -ENOSYS;
2711 if (copy_from_user(&volume, argp, sizeof(volume)))
2712 return -EFAULT;
2713 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2714}
2715
2716static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2717 void __user *argp)
2718{
2719 struct cdrom_volctrl volume;
2720 int ret;
2721
5944b2ce 2722 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
d2c5d4fc
CH		 2723
2724 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2725 return -ENOSYS;
2726
2727 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2728 if (ret)
2729 return ret;
2730
2731 if (copy_to_user(argp, &volume, sizeof(volume)))
2732 return -EFAULT;
2733 return 0;
2734}
2735
2736static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2737 unsigned int cmd)
2738{
2739 int ret;
2740
5944b2ce 2741 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
d2c5d4fc
CH		 2742
2743 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2744 return -ENOSYS;
2745 ret = check_for_audio_disc(cdi, cdi->ops);
2746 if (ret)
2747 return ret;
2748 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2749}
2750
1da177e4
LT		 2751/*
2752 * Required when we need to use READ_10 to issue other than 2048 block
2753 * reads
2754 */
2755static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2756{
2757 struct cdrom_device_ops *cdo = cdi->ops;
2758 struct packet_command cgc;
2759 struct modesel_head mh;
2760
2761 memset(&mh, 0, sizeof(mh));
2762 mh.block_desc_length = 0x08;
2763 mh.block_length_med = (size >> 8) & 0xff;
2764 mh.block_length_lo = size & 0xff;
2765
2766 memset(&cgc, 0, sizeof(cgc));
2767 cgc.cmd[0] = 0x15;
2768 cgc.cmd[1] = 1 << 4;
2769 cgc.cmd[4] = 12;
2770 cgc.buflen = sizeof(mh);
2771 cgc.buffer = (char *) &mh;
2772 cgc.data_direction = CGC_DATA_WRITE;
2773 mh.block_desc_length = 0x08;
2774 mh.block_length_med = (size >> 8) & 0xff;
2775 mh.block_length_lo = size & 0xff;
2776
2777 return cdo->generic_packet(cdi, &cgc);
2778}
2779
e1e60fda
JP		 2780static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2781 __u16 track, __u8 type, track_information *ti)
2782{
2783 struct cdrom_device_ops *cdo = cdi->ops;
2784 struct packet_command cgc;
2785 int ret, buflen;
2786
2787 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2788 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2789 cgc.cmd[1] = type & 3;
2790 cgc.cmd[4] = (track & 0xff00) >> 8;
2791 cgc.cmd[5] = track & 0xff;
2792 cgc.cmd[8] = 8;
2793 cgc.quiet = 1;
2794
2795 ret = cdo->generic_packet(cdi, &cgc);
2796 if (ret)
2797 return ret;
2798
2799 buflen = be16_to_cpu(ti->track_information_length) +
2800 sizeof(ti->track_information_length);
2801
2802 if (buflen > sizeof(track_information))
2803 buflen = sizeof(track_information);
2804
2805 cgc.cmd[8] = cgc.buflen = buflen;
2806 ret = cdo->generic_packet(cdi, &cgc);
2807 if (ret)
2808 return ret;
2809
2810 /* return actual fill size */
2811 return buflen;
2812}
2813
2814/* return the last written block on the CD-R media. this is for the udf
2815 file system. */
2816int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2817{
2818 struct cdrom_tocentry toc;
2819 disc_information di;
2820 track_information ti;
2821 __u32 last_track;
2822 int ret = -1, ti_size;
2823
2824 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2825 goto use_toc;
2826
2827 ret = cdrom_get_disc_info(cdi, &di);
2828 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2829 + sizeof(di.last_track_lsb)))
2830 goto use_toc;
2831
2832 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2833 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2834 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2835 if (ti_size < (int)offsetof(typeof(ti), track_start))
2836 goto use_toc;
2837
2838 /* if this track is blank, try the previous. */
2839 if (ti.blank) {
2840 if (last_track == 1)
2841 goto use_toc;
2842 last_track--;
2843 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2844 }
2845
2846 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2847 + sizeof(ti.track_size)))
2848 goto use_toc;
2849
2850 /* if last recorded field is valid, return it. */
2851 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2852 + sizeof(ti.last_rec_address))) {
2853 *last_written = be32_to_cpu(ti.last_rec_address);
2854 } else {
2855 /* make it up instead */
2856 *last_written = be32_to_cpu(ti.track_start) +
2857 be32_to_cpu(ti.track_size);
2858 if (ti.free_blocks)
2859 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2860 }
2861 return 0;
2862
2863 /* this is where we end up if the drive either can't do a
2864 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2865 it doesn't give enough information or fails. then we return
2866 the toc contents. */
2867use_toc:
2868 toc.cdte_format = CDROM_MSF;
2869 toc.cdte_track = CDROM_LEADOUT;
2870 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2871 return ret;
2872 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2873 *last_written = toc.cdte_addr.lba;
2874 return 0;
2875}
2876
dac1c5cf
JP		 2877/* return the next writable block. also for udf file system. */
2878static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2879 long *next_writable)
2880{
2881 disc_information di;
2882 track_information ti;
2883 __u16 last_track;
2884 int ret, ti_size;
2885
2886 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2887 goto use_last_written;
2888
2889 ret = cdrom_get_disc_info(cdi, &di);
2890 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2891 + sizeof(di.last_track_lsb))
2892 goto use_last_written;
2893
2894 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2895 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2896 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2897 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2898 goto use_last_written;
2899
2900 /* if this track is blank, try the previous. */
2901 if (ti.blank) {
2902 if (last_track == 1)
2903 goto use_last_written;
2904 last_track--;
2905 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2906 if (ti_size < 0)
2907 goto use_last_written;
2908 }
2909
2910 /* if next recordable address field is valid, use it. */
2911 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2912 + sizeof(ti.next_writable)) {
2913 *next_writable = be32_to_cpu(ti.next_writable);
2914 return 0;
2915 }
2916
2917use_last_written:
2918 ret = cdrom_get_last_written(cdi, next_writable);
2919 if (ret) {
2920 *next_writable = 0;
2921 return ret;
2922 } else {
2923 *next_writable += 7;
2924 return 0;
2925 }
2926}
2927
3147c531 2928static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2e9aa08a
JP		 2929 void __user *arg,
2930 struct packet_command *cgc,
2931 int cmd)
3147c531 2932{
1da177e4 2933 struct request_sense sense;
3147c531
MS		 2934 struct cdrom_msf msf;
2935 int blocksize = 0, format = 0, lba;
2936 int ret;
1da177e4 2937
1da177e4
LT		 2938 switch (cmd) {
2939 case CDROMREADRAW:
3147c531
MS		 2940 blocksize = CD_FRAMESIZE_RAW;
2941 break;
1da177e4 2942 case CDROMREADMODE1:
3147c531
MS		 2943 blocksize = CD_FRAMESIZE;
2944 format = 2;
2945 break;
2946 case CDROMREADMODE2:
2947 blocksize = CD_FRAMESIZE_RAW0;
2948 break;
2949 }
a09c391d
JP		 2950 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2951 return -EFAULT;
3147c531
MS		 2952 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2953 /* FIXME: we need upper bound checking, too!! */
2954 if (lba < 0)
2955 return -EINVAL;
2956
542db015 2957 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
3147c531
MS		 2958 if (cgc->buffer == NULL)
2959 return -ENOMEM;
2960
2961 memset(&sense, 0, sizeof(sense));
2962 cgc->sense = &sense;
2963 cgc->data_direction = CGC_DATA_READ;
2964 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2965 if (ret && sense.sense_key == 0x05 &&
2e9aa08a
JP		 2966 sense.asc == 0x20 &&
2967 sense.ascq == 0x00) {
3147c531
MS		 2968 /*
2969 * SCSI-II devices are not required to support
2970 * READ_CD, so let's try switching block size
2971 */
2972 /* FIXME: switch back again... */
2973 ret = cdrom_switch_blocksize(cdi, blocksize);
2974 if (ret)
2975 goto out;
2976 cgc->sense = NULL;
2977 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2978 ret |= cdrom_switch_blocksize(cdi, blocksize);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2e9aa08a 2988 void __user *arg)
3147c531
MS		 2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
a09c391d
JP		 2993 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
2994 sizeof(ra)))
2995 return -EFAULT;
3147c531
MS		 2996
2997 if (ra.addr_format == CDROM_MSF)
2998 lba = msf_to_lba(ra.addr.msf.minute,
2999 ra.addr.msf.second,
3000 ra.addr.msf.frame);
3001 else if (ra.addr_format == CDROM_LBA)
3002 lba = ra.addr.lba;
3003 else
3004 return -EINVAL;
3005
3006 /* FIXME: we need upper bound checking, too!! */
3007 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3008 return -EINVAL;
3009
3010 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3011}
3012
3013static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2e9aa08a 3014 void __user *arg)
3147c531
MS		 3015{
3016 int ret;
3017 struct cdrom_subchnl q;
3018 u_char requested, back;
a09c391d
JP		 3019 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3020 return -EFAULT;
3147c531
MS		 3021 requested = q.cdsc_format;
3022 if (!((requested == CDROM_MSF) ||
3023 (requested == CDROM_LBA)))
3024 return -EINVAL;
3025 q.cdsc_format = CDROM_MSF;
3026 ret = cdrom_read_subchannel(cdi, &q, 0);
3027 if (ret)
1da177e4 3028 return ret;
3147c531
MS		 3029 back = q.cdsc_format; /* local copy */
3030 sanitize_format(&q.cdsc_absaddr, &back, requested);
3031 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
a09c391d
JP		 3032 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3033 return -EFAULT;
5944b2ce 3034 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3147c531
MS		 3035 return 0;
3036}
1da177e4 3037
3147c531 3038static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3039 void __user *arg,
3040 struct packet_command *cgc)
3147c531
MS		 3041{
3042 struct cdrom_device_ops *cdo = cdi->ops;
3043 struct cdrom_msf msf;
5944b2ce 3044 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
a09c391d
JP		 3045 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3046 return -EFAULT;
3147c531
MS		 3047 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3048 cgc->cmd[3] = msf.cdmsf_min0;
3049 cgc->cmd[4] = msf.cdmsf_sec0;
3050 cgc->cmd[5] = msf.cdmsf_frame0;
3051 cgc->cmd[6] = msf.cdmsf_min1;
3052 cgc->cmd[7] = msf.cdmsf_sec1;
3053 cgc->cmd[8] = msf.cdmsf_frame1;
3054 cgc->data_direction = CGC_DATA_NONE;
3055 return cdo->generic_packet(cdi, cgc);
3056}
1da177e4 3057
3147c531 3058static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3059 void __user *arg,
3060 struct packet_command *cgc)
3147c531
MS		 3061{
3062 struct cdrom_device_ops *cdo = cdi->ops;
3063 struct cdrom_blk blk;
5944b2ce 3064 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
a09c391d
JP		 3065 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3066 return -EFAULT;
3147c531
MS		 3067 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3068 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3069 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3070 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3071 cgc->cmd[5] = blk.from & 0xff;
3072 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3073 cgc->cmd[8] = blk.len & 0xff;
3074 cgc->data_direction = CGC_DATA_NONE;
3075 return cdo->generic_packet(cdi, cgc);
3076}
1da177e4 3077
3147c531 3078static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3079 void __user *arg,
3080 struct packet_command *cgc,
3081 unsigned int cmd)
3147c531
MS		 3082{
3083 struct cdrom_volctrl volctrl;
3084 unsigned char buffer[32];
3085 char mask[sizeof(buffer)];
3086 unsigned short offset;
3087 int ret;
3088
5944b2ce 3089 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
1da177e4 3090
a09c391d
JP		 3091 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3092 sizeof(volctrl)))
3093 return -EFAULT;
1da177e4 3094
3147c531
MS		 3095 cgc->buffer = buffer;
3096 cgc->buflen = 24;
3097 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3098 if (ret)
3099 return ret;
1da177e4 3100
3147c531
MS		 3101 /* originally the code depended on buffer[1] to determine
3102 how much data is available for transfer. buffer[1] is
3103 unfortunately ambigious and the only reliable way seem
3104 to be to simply skip over the block descriptor... */
3105 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3106
3107 if (offset + 16 > sizeof(buffer))
3108 return -E2BIG;
3109
3110 if (offset + 16 > cgc->buflen) {
3111 cgc->buflen = offset + 16;
3112 ret = cdrom_mode_sense(cdi, cgc,
2e9aa08a 3113 GPMODE_AUDIO_CTL_PAGE, 0);
3147c531
MS		 3114 if (ret)
3115 return ret;
3116 }
1da177e4 3117
3147c531
MS		 3118 /* sanity check */
3119 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2e9aa08a 3120 buffer[offset + 1] < 14)
3147c531 3121 return -EINVAL;
1da177e4 3122
3147c531
MS		 3123 /* now we have the current volume settings. if it was only
3124 a CDROMVOLREAD, return these values */
3125 if (cmd == CDROMVOLREAD) {
3126 volctrl.channel0 = buffer[offset+9];
3127 volctrl.channel1 = buffer[offset+11];
3128 volctrl.channel2 = buffer[offset+13];
3129 volctrl.channel3 = buffer[offset+15];
a09c391d
JP		 3130 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3131 sizeof(volctrl)))
3132 return -EFAULT;
3147c531
MS		 3133 return 0;
3134 }
1da177e4 3135
3147c531
MS		 3136 /* get the volume mask */
3137 cgc->buffer = mask;
3138 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3139 if (ret)
3140 return ret;
1da177e4 3141
3147c531
MS		 3142 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3143 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3144 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3145 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
1da177e4 3146
3147c531
MS		 3147 /* set volume */
3148 cgc->buffer = buffer + offset - 8;
3149 memset(cgc->buffer, 0, 8);
3150 return cdrom_mode_select(cdi, cgc);
3151}
1da177e4 3152
3147c531 3153static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3154 struct packet_command *cgc,
3155 int cmd)
3147c531
MS		 3156{
3157 struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3158 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3147c531
MS		 3159 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3160 cgc->cmd[1] = 1;
3161 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3162 cgc->data_direction = CGC_DATA_NONE;
3163 return cdo->generic_packet(cdi, cgc);
3164}
1da177e4 3165
3147c531 3166static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3167 struct packet_command *cgc,
3168 int cmd)
3147c531
MS		 3169{
3170 struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3171 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3147c531
MS		 3172 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3173 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3174 cgc->data_direction = CGC_DATA_NONE;
3175 return cdo->generic_packet(cdi, cgc);
3176}
1da177e4 3177
3147c531 3178static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3179 void __user *arg,
3180 struct packet_command *cgc)
3147c531
MS		 3181{
3182 int ret;
3183 dvd_struct *s;
3184 int size = sizeof(dvd_struct);
3185
3186 if (!CDROM_CAN(CDC_DVD))
3187 return -ENOSYS;
3188
abb0f6a7
AV		 3189 s = memdup_user(arg, size);
3190 if (IS_ERR(s))
3191 return PTR_ERR(s);
3147c531 3192
5944b2ce 3193 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3147c531 3194
d194139c 3195 ret = dvd_read_struct(cdi, s, cgc);
3147c531
MS		 3196 if (ret)
3197 goto out;
3198
3199 if (copy_to_user(arg, s, size))
3200 ret = -EFAULT;
3201out:
3202 kfree(s);
3203 return ret;
3204}
3205
3206static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
2e9aa08a 3207 void __user *arg)
3147c531
MS		 3208{
3209 int ret;
3210 dvd_authinfo ai;
3211 if (!CDROM_CAN(CDC_DVD))
3212 return -ENOSYS;
5944b2ce 3213 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
a09c391d
JP		 3214 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3215 return -EFAULT;
3147c531
MS		 3216 ret = dvd_do_auth(cdi, &ai);
3217 if (ret)
1da177e4 3218 return ret;
a09c391d
JP		 3219 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3220 return -EFAULT;
3147c531
MS		 3221 return 0;
3222}
1da177e4 3223
3147c531 3224static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
2e9aa08a 3225 void __user *arg)
3147c531
MS		 3226{
3227 int ret;
3228 long next = 0;
5944b2ce 3229 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3147c531
MS		 3230 ret = cdrom_get_next_writable(cdi, &next);
3231 if (ret)
3232 return ret;
a09c391d
JP		 3233 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3234 return -EFAULT;
3147c531
MS		 3235 return 0;
3236}
1da177e4 3237
3147c531 3238static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
2e9aa08a 3239 void __user *arg)
3147c531
MS		 3240{
3241 int ret;
3242 long last = 0;
5944b2ce 3243 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3147c531
MS		 3244 ret = cdrom_get_last_written(cdi, &last);
3245 if (ret)
3246 return ret;
a09c391d
JP		 3247 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3248 return -EFAULT;
3147c531
MS		 3249 return 0;
3250}
3251
3252static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3253 unsigned long arg)
3254{
3255 struct packet_command cgc;
3256 void __user *userptr = (void __user *)arg;
3257
3258 memset(&cgc, 0, sizeof(cgc));
3259
3260 /* build a unified command and queue it through
3261 cdo->generic_packet() */
3262 switch (cmd) {
3263 case CDROMREADRAW:
3264 case CDROMREADMODE1:
3265 case CDROMREADMODE2:
3266 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3267 case CDROMREADAUDIO:
3268 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3269 case CDROMSUBCHNL:
3270 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3271 case CDROMPLAYMSF:
3272 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3273 case CDROMPLAYBLK:
3274 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3275 case CDROMVOLCTRL:
3276 case CDROMVOLREAD:
3277 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3278 case CDROMSTART:
3279 case CDROMSTOP:
3280 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3281 case CDROMPAUSE:
3282 case CDROMRESUME:
3283 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3284 case DVD_READ_STRUCT:
d194139c 3285 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3147c531
MS		 3286 case DVD_AUTH:
3287 return mmc_ioctl_dvd_auth(cdi, userptr);
3288 case CDROM_NEXT_WRITABLE:
3289 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3290 case CDROM_LAST_WRITTEN:
3291 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3292 }
1da177e4
LT		 3293
3294 return -ENOTTY;
3295}
3296
2e9aa08a
JP		 3297/*
3298 * Just about every imaginable ioctl is supported in the Uniform layer
3299 * these days.
3300 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3301 */
3302int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3303 fmode_t mode, unsigned int cmd, unsigned long arg)
3304{
3305 void __user *argp = (void __user *)arg;
3306 int ret;
3307
3308 /*
3309 * Try the generic SCSI command ioctl's first.
3310 */
3311 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3312 if (ret != -ENOTTY)
3313 return ret;
3314
3315 switch (cmd) {
3316 case CDROMMULTISESSION:
3317 return cdrom_ioctl_multisession(cdi, argp);
3318 case CDROMEJECT:
3319 return cdrom_ioctl_eject(cdi);
3320 case CDROMCLOSETRAY:
3321 return cdrom_ioctl_closetray(cdi);
3322 case CDROMEJECT_SW:
3323 return cdrom_ioctl_eject_sw(cdi, arg);
3324 case CDROM_MEDIA_CHANGED:
3325 return cdrom_ioctl_media_changed(cdi, arg);
3326 case CDROM_SET_OPTIONS:
3327 return cdrom_ioctl_set_options(cdi, arg);
3328 case CDROM_CLEAR_OPTIONS:
3329 return cdrom_ioctl_clear_options(cdi, arg);
3330 case CDROM_SELECT_SPEED:
3331 return cdrom_ioctl_select_speed(cdi, arg);
3332 case CDROM_SELECT_DISC:
3333 return cdrom_ioctl_select_disc(cdi, arg);
3334 case CDROMRESET:
3335 return cdrom_ioctl_reset(cdi, bdev);
3336 case CDROM_LOCKDOOR:
3337 return cdrom_ioctl_lock_door(cdi, arg);
3338 case CDROM_DEBUG:
3339 return cdrom_ioctl_debug(cdi, arg);
3340 case CDROM_GET_CAPABILITY:
3341 return cdrom_ioctl_get_capability(cdi);
3342 case CDROM_GET_MCN:
3343 return cdrom_ioctl_get_mcn(cdi, argp);
3344 case CDROM_DRIVE_STATUS:
3345 return cdrom_ioctl_drive_status(cdi, arg);
3346 case CDROM_DISC_STATUS:
3347 return cdrom_ioctl_disc_status(cdi);
3348 case CDROM_CHANGER_NSLOTS:
3349 return cdrom_ioctl_changer_nslots(cdi);
3350 }
3351
3352 /*
3353 * Use the ioctls that are implemented through the generic_packet()
3354 * interface. this may look at bit funny, but if -ENOTTY is
3355 * returned that particular ioctl is not implemented and we
3356 * let it go through the device specific ones.
3357 */
3358 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3359 ret = mmc_ioctl(cdi, cmd, arg);
3360 if (ret != -ENOTTY)
3361 return ret;
3362 }
3363
3364 /*
3365 * Note: most of the cd_dbg() calls are commented out here,
3366 * because they fill up the sys log when CD players poll
3367 * the drive.
3368 */
3369 switch (cmd) {
3370 case CDROMSUBCHNL:
3371 return cdrom_ioctl_get_subchnl(cdi, argp);
3372 case CDROMREADTOCHDR:
3373 return cdrom_ioctl_read_tochdr(cdi, argp);
3374 case CDROMREADTOCENTRY:
3375 return cdrom_ioctl_read_tocentry(cdi, argp);
3376 case CDROMPLAYMSF:
3377 return cdrom_ioctl_play_msf(cdi, argp);
3378 case CDROMPLAYTRKIND:
3379 return cdrom_ioctl_play_trkind(cdi, argp);
3380 case CDROMVOLCTRL:
3381 return cdrom_ioctl_volctrl(cdi, argp);
3382 case CDROMVOLREAD:
3383 return cdrom_ioctl_volread(cdi, argp);
3384 case CDROMSTART:
3385 case CDROMSTOP:
3386 case CDROMPAUSE:
3387 case CDROMRESUME:
3388 return cdrom_ioctl_audioctl(cdi, cmd);
3389 }
3390
3391 return -ENOSYS;
3392}
3393
1da177e4
LT		 3394EXPORT_SYMBOL(cdrom_get_last_written);
3395EXPORT_SYMBOL(register_cdrom);
3396EXPORT_SYMBOL(unregister_cdrom);
3397EXPORT_SYMBOL(cdrom_open);
3398EXPORT_SYMBOL(cdrom_release);
3399EXPORT_SYMBOL(cdrom_ioctl);
3400EXPORT_SYMBOL(cdrom_media_changed);
3401EXPORT_SYMBOL(cdrom_number_of_slots);
3402EXPORT_SYMBOL(cdrom_mode_select);
3403EXPORT_SYMBOL(cdrom_mode_sense);
3404EXPORT_SYMBOL(init_cdrom_command);
3405EXPORT_SYMBOL(cdrom_get_media_event);
3406
3407#ifdef CONFIG_SYSCTL
3408
3409#define CDROM_STR_SIZE 1000
3410
3411static struct cdrom_sysctl_settings {
3412 char info[CDROM_STR_SIZE]; /* general info */
3413 int autoclose; /* close tray upon mount, etc */
3414 int autoeject; /* eject on umount */
3415 int debug; /* turn on debugging messages */
3416 int lock; /* lock the door on device open */
3417 int check; /* check media type */
3418} cdrom_sysctl_settings;
3419
554988d6
DY		 3420enum cdrom_print_option {
3421 CTL_NAME,
3422 CTL_SPEED,
3423 CTL_SLOTS,
3424 CTL_CAPABILITY
3425};
3426
3427static int cdrom_print_info(const char *header, int val, char *info,
3428 int *pos, enum cdrom_print_option option)
3429{
3430 const int max_size = sizeof(cdrom_sysctl_settings.info);
3431 struct cdrom_device_info *cdi;
3432 int ret;
3433
3434 ret = scnprintf(info + *pos, max_size - *pos, header);
3435 if (!ret)
3436 return 1;
3437
3438 *pos += ret;
3439
7fd097d4 3440 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3441 switch (option) {
3442 case CTL_NAME:
3443 ret = scnprintf(info + *pos, max_size - *pos,
3444 "\t%s", cdi->name);
3445 break;
3446 case CTL_SPEED:
3447 ret = scnprintf(info + *pos, max_size - *pos,
3448 "\t%d", cdi->speed);
3449 break;
3450 case CTL_SLOTS:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%d", cdi->capacity);
3453 break;
3454 case CTL_CAPABILITY:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", CDROM_CAN(val) != 0);
3457 break;
3458 default:
e597cd09 3459 pr_info("invalid option%d\n", option);
554988d6
DY		 3460 return 1;
3461 }
3462 if (!ret)
3463 return 1;
3464 *pos += ret;
3465 }
3466
3467 return 0;
3468}
3469
90a3b89e 3470static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
1da177e4
LT		 3471 void __user *buffer, size_t *lenp, loff_t *ppos)
3472{
554988d6 3473 int pos;
1da177e4 3474 char *info = cdrom_sysctl_settings.info;
554988d6 3475 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3476
3477 if (!*lenp || (*ppos && !write)) {
3478 *lenp = 0;
3479 return 0;
3480 }
3481
554988d6
DY		 3482 mutex_lock(&cdrom_mutex);
3483
1da177e4
LT		 3484 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3485
554988d6
DY		 3486 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3487 goto done;
3488 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3489 goto done;
3490 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3491 goto done;
3492 if (cdrom_print_info("\nCan close tray:\t",
3493 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3494 goto done;
3495 if (cdrom_print_info("\nCan open tray:\t",
3496 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3497 goto done;
3498 if (cdrom_print_info("\nCan lock tray:\t",
3499 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan change speed:",
3502 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan select disk:",
3505 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan read multisession:",
3508 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan read MCN:\t",
3511 CDC_MCN, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nReports media changed:",
3514 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan play audio:\t",
3517 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nCan write CD-R:\t",
3520 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan write CD-RW:",
3523 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan read DVD:\t",
3526 CDC_DVD, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write DVD-R:",
3529 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan write DVD-RAM:",
3532 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan read MRW:\t",
3535 CDC_MRW, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write MRW:\t",
3538 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan write RAM:\t",
3541 CDC_RAM, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3544 goto done;
3545doit:
3546 mutex_unlock(&cdrom_mutex);
8d65af78 3547 return proc_dostring(ctl, write, buffer, lenp, ppos);
554988d6 3548done:
e597cd09 3549 pr_info("info buffer too small\n");
554988d6 3550 goto doit;
1da177e4
LT		 3551}
3552
3553/* Unfortunately, per device settings are not implemented through
3554 procfs/sysctl yet. When they are, this will naturally disappear. For now
3555 just update all drives. Later this will become the template on which
3556 new registered drives will be based. */
3557static void cdrom_update_settings(void)
3558{
3559 struct cdrom_device_info *cdi;
3560
032d8d90 3561 mutex_lock(&cdrom_mutex);
7fd097d4 3562 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3563 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3564 cdi->options |= CDO_AUTO_CLOSE;
3565 else if (!autoclose)
3566 cdi->options &= ~CDO_AUTO_CLOSE;
3567 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3568 cdi->options |= CDO_AUTO_EJECT;
3569 else if (!autoeject)
3570 cdi->options &= ~CDO_AUTO_EJECT;
3571 if (lockdoor && CDROM_CAN(CDC_LOCK))
3572 cdi->options |= CDO_LOCK;
3573 else if (!lockdoor)
3574 cdi->options &= ~CDO_LOCK;
3575 if (check_media_type)
3576 cdi->options |= CDO_CHECK_TYPE;
3577 else
3578 cdi->options &= ~CDO_CHECK_TYPE;
3579 }
032d8d90 3580 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3581}
3582
90a3b89e 3583static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
1da177e4
LT		 3584 void __user *buffer, size_t *lenp, loff_t *ppos)
3585{
1da177e4
LT		 3586 int ret;
3587
8d65af78 3588 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 3589
06489b4e 3590 if (write) {
1da177e4
LT		 3591
3592 /* we only care for 1 or 0. */
06489b4e
EB		 3593 autoclose = !!cdrom_sysctl_settings.autoclose;
3594 autoeject = !!cdrom_sysctl_settings.autoeject;
3595 debug = !!cdrom_sysctl_settings.debug;
3596 lockdoor = !!cdrom_sysctl_settings.lock;
3597 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3598
1da177e4
LT		 3599 /* update the option flags according to the changes. we
3600 don't have per device options through sysctl yet,
3601 but we will have and then this will disappear. */
3602 cdrom_update_settings();
3603 }
3604
3605 return ret;
3606}
3607
3608/* Place files in /proc/sys/dev/cdrom */
90a3b89e 3609static struct ctl_table cdrom_table[] = {
1da177e4 3610 {
1da177e4
LT		 3611 .procname = "info",
3612 .data = &cdrom_sysctl_settings.info,
3613 .maxlen = CDROM_STR_SIZE,
3614 .mode = 0444,
6d456111 3615 .proc_handler = cdrom_sysctl_info,
1da177e4
LT		 3616 },
3617 {
1da177e4
LT		 3618 .procname = "autoclose",
3619 .data = &cdrom_sysctl_settings.autoclose,
3620 .maxlen = sizeof(int),
3621 .mode = 0644,
6d456111 3622 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3623 },
3624 {
1da177e4
LT		 3625 .procname = "autoeject",
3626 .data = &cdrom_sysctl_settings.autoeject,
3627 .maxlen = sizeof(int),
3628 .mode = 0644,
6d456111 3629 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3630 },
3631 {
1da177e4
LT		 3632 .procname = "debug",
3633 .data = &cdrom_sysctl_settings.debug,
3634 .maxlen = sizeof(int),
3635 .mode = 0644,
6d456111 3636 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3637 },
3638 {
1da177e4
LT		 3639 .procname = "lock",
3640 .data = &cdrom_sysctl_settings.lock,
3641 .maxlen = sizeof(int),
3642 .mode = 0644,
6d456111 3643 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3644 },
3645 {
1da177e4
LT		 3646 .procname = "check_media",
3647 .data = &cdrom_sysctl_settings.check,
3648 .maxlen = sizeof(int),
3649 .mode = 0644,
6d456111 3650 .proc_handler = cdrom_sysctl_handler
1da177e4 3651 },
894d2491 3652 { }
1da177e4
LT		 3653};
3654
90a3b89e 3655static struct ctl_table cdrom_cdrom_table[] = {
1da177e4 3656 {
1da177e4
LT		 3657 .procname = "cdrom",
3658 .maxlen = 0,
3659 .mode = 0555,
3660 .child = cdrom_table,
3661 },
894d2491 3662 { }
1da177e4
LT		 3663};
3664
3665/* Make sure that /proc/sys/dev is there */
90a3b89e 3666static struct ctl_table cdrom_root_table[] = {
1da177e4 3667 {
1da177e4
LT		 3668 .procname = "dev",
3669 .maxlen = 0,
3670 .mode = 0555,
3671 .child = cdrom_cdrom_table,
3672 },
894d2491 3673 { }
1da177e4
LT		 3674};
3675static struct ctl_table_header *cdrom_sysctl_header;
3676
3677static void cdrom_sysctl_register(void)
3678{
3679 static int initialized;
3680
3681 if (initialized == 1)
3682 return;
3683
0b4d4147 3684 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3685
3686 /* set the defaults */
3687 cdrom_sysctl_settings.autoclose = autoclose;
3688 cdrom_sysctl_settings.autoeject = autoeject;
3689 cdrom_sysctl_settings.debug = debug;
3690 cdrom_sysctl_settings.lock = lockdoor;
3691 cdrom_sysctl_settings.check = check_media_type;
3692
3693 initialized = 1;
3694}
3695
3696static void cdrom_sysctl_unregister(void)
3697{
3698 if (cdrom_sysctl_header)
3699 unregister_sysctl_table(cdrom_sysctl_header);
3700}
3701
17672cf0
AM		 3702#else /* CONFIG_SYSCTL */
3703
3704static void cdrom_sysctl_register(void)
3705{
3706}
3707
3708static void cdrom_sysctl_unregister(void)
3709{
3710}
3711
1da177e4
LT		 3712#endif /* CONFIG_SYSCTL */
3713
3714static int __init cdrom_init(void)
3715{
1da177e4 3716 cdrom_sysctl_register();
17672cf0 3717
1da177e4
LT		 3718 return 0;
3719}
3720
3721static void __exit cdrom_exit(void)
3722{
e597cd09 3723 pr_info("Uniform CD-ROM driver unloaded\n");
1da177e4 3724 cdrom_sysctl_unregister();
1da177e4
LT		 3725}
3726
3727module_init(cdrom_init);
3728module_exit(cdrom_exit);
3729MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)