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cdrom: Check SCSI passthrough support before reading audio
[mirror_ubuntu-artful-kernel.git] / drivers / cdrom / cdrom.c
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f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
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>
7c0f6ba6 284#include <linux/uaccess.h>
82ed4db4 285#include <scsi/scsi_request.h>
1da177e4
LT		 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 344
853fe1bf
KC		 345int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
1da177e4
LT		 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}
853fe1bf 357EXPORT_SYMBOL(cdrom_dummy_generic_packet);
1da177e4 358
40569c61 359static int cdrom_flush_cache(struct cdrom_device_info *cdi)
1da177e4
LT		 360{
361 struct packet_command cgc;
1da177e4 362
40569c61
JP		 363 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
364 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
1da177e4 365
40569c61 366 cgc.timeout = 5 * 60 * HZ;
1da177e4 367
40569c61 368 return cdi->ops->generic_packet(cdi, &cgc);
1da177e4
LT		 369}
370
bd6f0bba
JP		 371/* requires CD R/RW */
372static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
373 disc_information *di)
374{
853fe1bf 375 const struct cdrom_device_ops *cdo = cdi->ops;
bd6f0bba
JP		 376 struct packet_command cgc;
377 int ret, buflen;
378
379 /* set up command and get the disc info */
380 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
381 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
382 cgc.cmd[8] = cgc.buflen = 2;
383 cgc.quiet = 1;
384
385 ret = cdo->generic_packet(cdi, &cgc);
386 if (ret)
387 return ret;
388
389 /* not all drives have the same disc_info length, so requeue
390 * packet with the length the drive tells us it can supply
391 */
392 buflen = be16_to_cpu(di->disc_information_length) +
393 sizeof(di->disc_information_length);
394
395 if (buflen > sizeof(disc_information))
396 buflen = sizeof(disc_information);
397
398 cgc.cmd[8] = cgc.buflen = buflen;
399 ret = cdo->generic_packet(cdi, &cgc);
400 if (ret)
401 return ret;
402
403 /* return actual fill size */
404 return buflen;
405}
406
40569c61
JP		 407/* This macro makes sure we don't have to check on cdrom_device_ops
408 * existence in the run-time routines below. Change_capability is a
409 * hack to have the capability flags defined const, while we can still
410 * change it here without gcc complaining at every line.
411 */
412#define ENSURE(call, bits) \
413do { \
414 if (cdo->call == NULL) \
415 *change_capability &= ~(bits); \
416} while (0)
417
1da177e4
LT		 418/*
419 * the first prototypes used 0x2c as the page code for the mrw mode page,
420 * subsequently this was changed to 0x03. probe the one used by this drive
421 */
422static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
423{
424 struct packet_command cgc;
fce53847 425 char buffer[16];
1da177e4 426
fce53847 427 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 428
429 cgc.timeout = HZ;
430 cgc.quiet = 1;
431
432 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
433 cdi->mrw_mode_page = MRW_MODE_PC;
fce53847 434 return 0;
1da177e4
LT		 435 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
436 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
fce53847 437 return 0;
1da177e4 438 }
fce53847
FT		 439
440 return 1;
1da177e4
LT		 441}
442
443static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
444{
445 struct packet_command cgc;
446 struct mrw_feature_desc *mfd;
fce53847 447 unsigned char buffer[16];
1da177e4
LT		 448 int ret;
449
450 *write = 0;
451
fce53847 452 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 453
454 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
455 cgc.cmd[3] = CDF_MRW;
fce53847 456 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 457 cgc.quiet = 1;
458
459 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 460 return ret;
1da177e4
LT		 461
462 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
fce53847
FT		 463 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
464 return 1;
1da177e4
LT		 465 *write = mfd->write;
466
467 if ((ret = cdrom_mrw_probe_pc(cdi))) {
468 *write = 0;
fce53847 469 return ret;
1da177e4 470 }
fce53847
FT		 471
472 return 0;
1da177e4
LT		 473}
474
475static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
476{
477 struct packet_command cgc;
fce53847 478 unsigned char buffer[12];
1da177e4
LT		 479 int ret;
480
e597cd09 481 pr_info("%sstarting format\n", cont ? "Re" : "");
1da177e4
LT		 482
483 /*
484 * FmtData bit set (bit 4), format type is 1
485 */
fce53847 486 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
1da177e4
LT		 487 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
488 cgc.cmd[1] = (1 << 4) | 1;
489
490 cgc.timeout = 5 * 60 * HZ;
491
492 /*
493 * 4 byte format list header, 8 byte format list descriptor
494 */
495 buffer[1] = 1 << 1;
496 buffer[3] = 8;
497
498 /*
499 * nr_blocks field
500 */
501 buffer[4] = 0xff;
502 buffer[5] = 0xff;
503 buffer[6] = 0xff;
504 buffer[7] = 0xff;
505
506 buffer[8] = 0x24 << 2;
507 buffer[11] = cont;
508
509 ret = cdi->ops->generic_packet(cdi, &cgc);
510 if (ret)
e597cd09 511 pr_info("bgformat failed\n");
1da177e4
LT		 512
513 return ret;
514}
515
516static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
517{
518 struct packet_command cgc;
519
520 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
521 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
522
523 /*
524 * Session = 1, Track = 0
525 */
526 cgc.cmd[1] = !!immed;
527 cgc.cmd[2] = 1 << 1;
528
529 cgc.timeout = 5 * 60 * HZ;
530
531 return cdi->ops->generic_packet(cdi, &cgc);
532}
533
1da177e4
LT		 534static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
535{
536 disc_information di;
537 int ret;
538
539 ret = cdrom_get_disc_info(cdi, &di);
540 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
541 return 1;
542
543 ret = 0;
544 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
e597cd09 545 pr_info("issuing MRW background format suspend\n");
1da177e4
LT		 546 ret = cdrom_mrw_bgformat_susp(cdi, 0);
547 }
548
7da21a02 549 if (!ret && cdi->media_written)
1da177e4
LT		 550 ret = cdrom_flush_cache(cdi);
551
552 return ret;
553}
554
555static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
556{
557 struct packet_command cgc;
558 struct mode_page_header *mph;
fce53847 559 char buffer[16];
1da177e4
LT		 560 int ret, offset, size;
561
fce53847 562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4 563
fce53847
FT		 564 cgc.buffer = buffer;
565 cgc.buflen = sizeof(buffer);
1da177e4 566
40569c61
JP		 567 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
568 if (ret)
fce53847 569 return ret;
1da177e4 570
40569c61 571 mph = (struct mode_page_header *)buffer;
1da177e4
LT		 572 offset = be16_to_cpu(mph->desc_length);
573 size = be16_to_cpu(mph->mode_data_length) + 2;
574
575 buffer[offset + 3] = space;
576 cgc.buflen = size;
577
40569c61
JP		 578 ret = cdrom_mode_select(cdi, &cgc);
579 if (ret)
fce53847 580 return ret;
1da177e4 581
e597cd09
JP		 582 pr_info("%s: mrw address space %s selected\n",
583 cdi->name, mrw_address_space[space]);
fce53847 584 return 0;
1da177e4
LT		 585}
586
40569c61
JP		 587int register_cdrom(struct cdrom_device_info *cdi)
588{
589 static char banner_printed;
853fe1bf 590 const struct cdrom_device_ops *cdo = cdi->ops;
40569c61
JP		 591 int *change_capability = (int *)&cdo->capability; /* hack */
592
593 cd_dbg(CD_OPEN, "entering register_cdrom\n");
594
595 if (cdo->open == NULL || cdo->release == NULL)
596 return -EINVAL;
597 if (!banner_printed) {
598 pr_info("Uniform CD-ROM driver " REVISION "\n");
599 banner_printed = 1;
600 cdrom_sysctl_register();
601 }
602
603 ENSURE(drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL && cdo->media_changed == NULL)
605 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
606 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(lock_door, CDC_LOCK);
608 ENSURE(select_speed, CDC_SELECT_SPEED);
609 ENSURE(get_last_session, CDC_MULTI_SESSION);
610 ENSURE(get_mcn, CDC_MCN);
611 ENSURE(reset, CDC_RESET);
612 ENSURE(generic_packet, CDC_GENERIC_PACKET);
613 cdi->mc_flags = 0;
40569c61
JP		 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
853fe1bf 633 WARN_ON(!cdo->generic_packet);
40569c61
JP		 634
635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
636 mutex_lock(&cdrom_mutex);
637 list_add(&cdi->list, &cdrom_list);
638 mutex_unlock(&cdrom_mutex);
639 return 0;
640}
641#undef ENSURE
642
643void unregister_cdrom(struct cdrom_device_info *cdi)
644{
645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
646
647 mutex_lock(&cdrom_mutex);
648 list_del(&cdi->list);
649 mutex_unlock(&cdrom_mutex);
650
651 if (cdi->exit)
652 cdi->exit(cdi);
653
40569c61
JP		 654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
655}
656
657int cdrom_get_media_event(struct cdrom_device_info *cdi,
658 struct media_event_desc *med)
659{
660 struct packet_command cgc;
661 unsigned char buffer[8];
662 struct event_header *eh = (struct event_header *)buffer;
663
664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
666 cgc.cmd[1] = 1; /* IMMED */
667 cgc.cmd[4] = 1 << 4; /* media event */
668 cgc.cmd[8] = sizeof(buffer);
669 cgc.quiet = 1;
670
671 if (cdi->ops->generic_packet(cdi, &cgc))
672 return 1;
673
674 if (be16_to_cpu(eh->data_len) < sizeof(*med))
675 return 1;
676
677 if (eh->nea || eh->notification_class != 0x4)
678 return 1;
679
680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
681 return 0;
682}
683
1da177e4
LT		 684static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
686{
687 struct packet_command cgc;
fce53847 688 char buffer[24];
1da177e4
LT		 689 int ret;
690
fce53847 691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 692
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
fce53847 695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
1da177e4
LT		 696 cgc.quiet = 1;
697
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 699 return ret;
1da177e4
LT		 700
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
fce53847 702 return 0;
1da177e4
LT		 703}
704
705static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
706{
707 struct packet_command cgc;
fce53847 708 char buffer[16];
56052d52 709 __be16 *feature_code;
1da177e4
LT		 710 int ret;
711
fce53847 712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 713
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
fce53847 716 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 717 cgc.quiet = 1;
718
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 720 return ret;
1da177e4 721
56052d52 722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4 723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
fce53847
FT		 724 return 0;
725
726 return 1;
1da177e4
LT		 727}
728
729
730static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
731{
732 struct rwrt_feature_desc rfd;
733 int ret;
734
735 *write = 0;
736
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
738 return ret;
739
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
741 *write = 1;
742
743 return 0;
744}
745
746static int cdrom_media_erasable(struct cdrom_device_info *cdi)
747{
748 disc_information di;
749 int ret;
750
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
753 return -1;
754
755 return di.erasable;
756}
757
758/*
759 * FIXME: check RO bit
760 */
761static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
762{
763 int ret = cdrom_media_erasable(cdi);
764
765 /*
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
768 */
769 if (!ret)
770 return 1;
771
772 return 0;
773}
774
775static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
776{
777 disc_information di;
778 int ret;
779
780 /*
781 * always reset to DMA lba space on open
782 */
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
e597cd09 784 pr_err("failed setting lba address space\n");
1da177e4
LT		 785 return 1;
786 }
787
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
790 return 1;
791
792 if (!di.erasable)
793 return 1;
794
795 /*
796 * mrw_status
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
801 */
802 ret = 0;
e597cd09 803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
1da177e4
LT		 804 if (!di.mrw_status)
805 ret = 1;
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
807 mrw_format_restart)
808 ret = cdrom_mrw_bgformat(cdi, 1);
809
810 return ret;
811}
812
813static int mo_open_write(struct cdrom_device_info *cdi)
814{
815 struct packet_command cgc;
fce53847 816 char buffer[255];
1da177e4
LT		 817 int ret;
818
fce53847 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
1da177e4
LT		 820 cgc.quiet = 1;
821
822 /*
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
825 */
826
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
828 if (ret)
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
830 if (ret) {
831 cgc.buflen = 255;
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
833 }
834
835 /* drive gave us no info, let the user go ahead */
fce53847
FT		 836 if (ret)
837 return 0;
1da177e4 838
fce53847 839 return buffer[3] & 0x80;
1da177e4
LT		 840}
841
842static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
843{
844 struct rwrt_feature_desc rfd;
845 int ret;
846
847 if ((ret = cdrom_has_defect_mgt(cdi)))
848 return ret;
849
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
851 return ret;
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
853 ret = !rfd.curr;
854
5944b2ce 855 cd_dbg(CD_OPEN, "can open for random write\n");
1da177e4
LT		 856 return ret;
857}
858
859static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
860{
861 struct packet_command cgc;
fce53847 862 char buffer[32];
1da177e4
LT		 863 int ret, mmc3_profile;
864
fce53847 865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 866
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
868 cgc.cmd[1] = 0;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
fce53847 870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
1da177e4
LT		 871 cgc.quiet = 1;
872
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
875 else
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
877
878 cdi->mmc3_profile = mmc3_profile;
879}
880
881static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
882{
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
f7e7868b 886 case 0x43: /* BD-RE */
1da177e4
LT		 887 return 0;
888 default:
889 return 1;
890 }
891}
892
893/*
894 * returns 0 for ok to open write, non-0 to disallow
895 */
896static int cdrom_open_write(struct cdrom_device_info *cdi)
897{
898 int mrw, mrw_write, ram_write;
899 int ret = 1;
900
901 mrw = 0;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
903 mrw = 1;
904
905 if (CDROM_CAN(CDC_MO_DRIVE))
906 ram_write = 1;
907 else
908 (void) cdrom_is_random_writable(cdi, &ram_write);
909
910 if (mrw)
911 cdi->mask &= ~CDC_MRW;
912 else
913 cdi->mask |= CDC_MRW;
914
915 if (mrw_write)
916 cdi->mask &= ~CDC_MRW_W;
917 else
918 cdi->mask |= CDC_MRW_W;
919
920 if (ram_write)
921 cdi->mask &= ~CDC_RAM;
922 else
923 cdi->mask |= CDC_RAM;
924
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
935 ret = 0;
936
937 return ret;
938}
939
940static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
941{
942 struct packet_command cgc;
943
944 if (cdi->mmc3_profile != 0x1a) {
5944b2ce 945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
1da177e4
LT		 946 return;
947 }
948
949 if (!cdi->media_written) {
5944b2ce 950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
1da177e4
LT		 951 return;
952 }
953
e597cd09 954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
1da177e4
LT		 955
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
958 cgc.timeout = 30*HZ;
959 cdi->ops->generic_packet(cdi, &cgc);
960
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
964 cgc.quiet = 1;
965 cdi->ops->generic_packet(cdi, &cgc);
966
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
970 cgc.quiet = 1;
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
973
974 cdi->media_written = 0;
975}
976
977static int cdrom_close_write(struct cdrom_device_info *cdi)
978{
979#if 0
980 return cdrom_flush_cache(cdi);
981#else
982 return 0;
983#endif
984}
985
a803393b
JP		 986/* badly broken, I know. Is due for a fixup anytime. */
987static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
988{
989 struct cdrom_tochdr header;
990 struct cdrom_tocentry entry;
991 int ret, i;
992 tracks->data = 0;
993 tracks->audio = 0;
994 tracks->cdi = 0;
995 tracks->xa = 0;
996 tracks->error = 0;
997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
998 /* Grab the TOC header so we can see how many tracks there are */
999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1000 if (ret) {
1001 if (ret == -ENOMEDIUM)
1002 tracks->error = CDS_NO_DISC;
1003 else
1004 tracks->error = CDS_NO_INFO;
1005 return;
1006 }
1007 /* check what type of tracks are on this disc */
1008 entry.cdte_format = CDROM_MSF;
1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1010 entry.cdte_track = i;
1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1012 tracks->error = CDS_NO_INFO;
1013 return;
1014 }
1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1016 if (entry.cdte_format == 0x10)
1017 tracks->cdi++;
1018 else if (entry.cdte_format == 0x20)
1019 tracks->xa++;
1020 else
1021 tracks->data++;
1022 } else {
1023 tracks->audio++;
1024 }
1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1026 i, entry.cdte_format, entry.cdte_ctrl);
1027 }
1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1029 header.cdth_trk1, tracks->audio, tracks->data,
1030 tracks->cdi, tracks->xa);
1031}
1032
1da177e4 1033static
82b91540 1034int open_for_data(struct cdrom_device_info *cdi)
1da177e4
LT		 1035{
1036 int ret;
853fe1bf 1037 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1038 tracktype tracks;
5944b2ce 1039 cd_dbg(CD_OPEN, "entering open_for_data\n");
1da177e4
LT		 1040 /* Check if the driver can report drive status. If it can, we
1041 can do clever things. If it can't, well, we at least tried! */
1042 if (cdo->drive_status != NULL) {
1043 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1045 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1046 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1047 /* can/may i close it? */
1048 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1049 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1050 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1051 ret=cdo->tray_move(cdi,0);
1052 if (ret) {
5944b2ce 1053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1da177e4
LT		 1054 /* Ignore the error from the low
1055 level driver. We don't care why it
1056 couldn't close the tray. We only care
1057 that there is no disc in the drive,
1058 since that is the _REAL_ problem here.*/
1059 ret=-ENOMEDIUM;
1060 goto clean_up_and_return;
1061 }
1062 } else {
5944b2ce 1063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1da177e4
LT		 1064 ret=-ENOMEDIUM;
1065 goto clean_up_and_return;
1066 }
1067 /* Ok, the door should be closed now.. Check again */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce
JP		 1070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1da177e4
LT		 1072 ret=-ENOMEDIUM;
1073 goto clean_up_and_return;
1074 }
5944b2ce 1075 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1076 }
1077 /* the door should be closed now, check for the disc */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if (ret!=CDS_DISC_OK) {
1080 ret = -ENOMEDIUM;
1081 goto clean_up_and_return;
1082 }
1083 }
1084 cdrom_count_tracks(cdi, &tracks);
1085 if (tracks.error == CDS_NO_DISC) {
5944b2ce 1086 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1da177e4
LT		 1087 ret=-ENOMEDIUM;
1088 goto clean_up_and_return;
1089 }
1090 /* CD-Players which don't use O_NONBLOCK, workman
1091 * for example, need bit CDO_CHECK_TYPE cleared! */
1092 if (tracks.data==0) {
1093 if (cdi->options & CDO_CHECK_TYPE) {
1094 /* give people a warning shot, now that CDO_CHECK_TYPE
1095 is the default case! */
5944b2ce
JP		 1096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1098 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1099 ret=-EMEDIUMTYPE;
1100 goto clean_up_and_return;
1101 }
1102 else {
5944b2ce 1103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1da177e4
LT		 1104 }
1105 }
1106
5944b2ce 1107 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1da177e4
LT		 1108
1109 /* all seems well, we can open the device */
1110 ret = cdo->open(cdi, 0); /* open for data */
5944b2ce 1111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1da177e4
LT		 1112 /* After all this careful checking, we shouldn't have problems
1113 opening the device, but we don't want the device locked if
1114 this somehow fails... */
1115 if (ret) {
5944b2ce 1116 cd_dbg(CD_OPEN, "open device failed\n");
1da177e4
LT		 1117 goto clean_up_and_return;
1118 }
1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1120 cdo->lock_door(cdi, 1);
5944b2ce 1121 cd_dbg(CD_OPEN, "door locked\n");
1da177e4 1122 }
5944b2ce 1123 cd_dbg(CD_OPEN, "device opened successfully\n");
1da177e4
LT		 1124 return ret;
1125
1126 /* Something failed. Try to unlock the drive, because some drivers
1127 (notably ide-cd) lock the drive after every command. This produced
1128 a nasty bug where after mount failed, the drive would remain locked!
1129 This ensures that the drive gets unlocked after a mount fails. This
1130 is a goto to avoid bloating the driver with redundant code. */
1131clean_up_and_return:
5944b2ce 1132 cd_dbg(CD_OPEN, "open failed\n");
1da177e4
LT		 1133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1134 cdo->lock_door(cdi, 0);
5944b2ce 1135 cd_dbg(CD_OPEN, "door unlocked\n");
1da177e4
LT		 1136 }
1137 return ret;
1138}
1139
82b91540
JP		 1140/* We use the open-option O_NONBLOCK to indicate that the
1141 * purpose of opening is only for subsequent ioctl() calls; no device
1142 * integrity checks are performed.
1143 *
1144 * We hope that all cd-player programs will adopt this convention. It
1145 * is in their own interest: device control becomes a lot easier
1146 * this way.
1147 */
1148int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1149 fmode_t mode)
1150{
1151 int ret;
1152
1153 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1154
1155 /* open is event synchronization point, check events first */
1156 check_disk_change(bdev);
1157
1158 /* if this was a O_NONBLOCK open and we should honor the flags,
1159 * do a quick open without drive/disc integrity checks. */
1160 cdi->use_count++;
1161 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1162 ret = cdi->ops->open(cdi, 1);
1163 } else {
1164 ret = open_for_data(cdi);
1165 if (ret)
1166 goto err;
1167 cdrom_mmc3_profile(cdi);
1168 if (mode & FMODE_WRITE) {
1169 ret = -EROFS;
1170 if (cdrom_open_write(cdi))
1171 goto err_release;
1172 if (!CDROM_CAN(CDC_RAM))
1173 goto err_release;
1174 ret = 0;
1175 cdi->media_written = 0;
1176 }
1177 }
1178
1179 if (ret)
1180 goto err;
1181
1182 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1183 cdi->name, cdi->use_count);
1184 return 0;
1185err_release:
1186 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1187 cdi->ops->lock_door(cdi, 0);
1188 cd_dbg(CD_OPEN, "door unlocked\n");
1189 }
1190 cdi->ops->release(cdi);
1191err:
1192 cdi->use_count--;
1193 return ret;
1194}
1195
1da177e4
LT		 1196/* This code is similar to that in open_for_data. The routine is called
1197 whenever an audio play operation is requested.
1198*/
853fe1bf
KC		 1199static int check_for_audio_disc(struct cdrom_device_info *cdi,
1200 const struct cdrom_device_ops *cdo)
1da177e4
LT		 1201{
1202 int ret;
1203 tracktype tracks;
5944b2ce 1204 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1da177e4
LT		 1205 if (!(cdi->options & CDO_CHECK_TYPE))
1206 return 0;
1207 if (cdo->drive_status != NULL) {
1208 ret = cdo->drive_status(cdi, CDSL_CURRENT);
5944b2ce 1209 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1da177e4 1210 if (ret == CDS_TRAY_OPEN) {
5944b2ce 1211 cd_dbg(CD_OPEN, "the tray is open...\n");
1da177e4
LT		 1212 /* can/may i close it? */
1213 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1214 cdi->options & CDO_AUTO_CLOSE) {
5944b2ce 1215 cd_dbg(CD_OPEN, "trying to close the tray\n");
1da177e4
LT		 1216 ret=cdo->tray_move(cdi,0);
1217 if (ret) {
5944b2ce 1218 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1da177e4
LT		 1219 /* Ignore the error from the low
1220 level driver. We don't care why it
1221 couldn't close the tray. We only care
1222 that there is no disc in the drive,
1223 since that is the _REAL_ problem here.*/
1224 return -ENOMEDIUM;
1225 }
1226 } else {
5944b2ce 1227 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1da177e4
LT		 1228 return -ENOMEDIUM;
1229 }
1230 /* Ok, the door should be closed now.. Check again */
1231 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1232 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
5944b2ce 1233 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1da177e4
LT		 1234 return -ENOMEDIUM;
1235 }
1236 if (ret!=CDS_DISC_OK) {
5944b2ce 1237 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1da177e4
LT		 1238 return -EIO;
1239 }
5944b2ce 1240 cd_dbg(CD_OPEN, "the tray is now closed\n");
1da177e4
LT		 1241 }
1242 }
1243 cdrom_count_tracks(cdi, &tracks);
1244 if (tracks.error)
1245 return(tracks.error);
1246
1247 if (tracks.audio==0)
1248 return -EMEDIUMTYPE;
1249
1250 return 0;
1251}
1252
bbc1cc97 1253void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1da177e4 1254{
853fe1bf 1255 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1256 int opened_for_data;
1257
5944b2ce 1258 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1259
1260 if (cdi->use_count > 0)
1261 cdi->use_count--;
35841f70
BP		 1262
1263 if (cdi->use_count == 0) {
5944b2ce
JP		 1264 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1265 cdi->name);
1da177e4 1266 cdrom_dvd_rw_close_write(cdi);
35841f70 1267
cdccaa94 1268 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
5944b2ce 1269 cd_dbg(CD_CLOSE, "Unlocking door!\n");
35841f70
BP		 1270 cdo->lock_door(cdi, 0);
1271 }
1da177e4 1272 }
35841f70 1273
1da177e4 1274 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
bbc1cc97 1275 !(mode & FMODE_NDELAY);
1da177e4
LT		 1276
1277 /*
1278 * flush cache on last write release
1279 */
1280 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1281 cdrom_close_write(cdi);
1282
1283 cdo->release(cdi);
1284 if (cdi->use_count == 0) { /* last process that closes dev*/
1285 if (opened_for_data &&
1286 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1287 cdo->tray_move(cdi, 1);
1288 }
1da177e4
LT		 1289}
1290
1291static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1292 struct cdrom_changer_info *buf)
1293{
1294 struct packet_command cgc;
853fe1bf 1295 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1296 int length;
1297
1298 /*
1299 * Sanyo changer isn't spec compliant (doesn't use regular change
1300 * LOAD_UNLOAD command, and it doesn't implement the mech status
1301 * command below
1302 */
1303 if (cdi->sanyo_slot) {
1304 buf->hdr.nslots = 3;
1305 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1306 for (length = 0; length < 3; length++) {
1307 buf->slots[length].disc_present = 1;
1308 buf->slots[length].change = 0;
1309 }
1310 return 0;
1311 }
1312
1313 length = sizeof(struct cdrom_mechstat_header) +
1314 cdi->capacity * sizeof(struct cdrom_slot);
1315
1316 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1317 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1318 cgc.cmd[8] = (length >> 8) & 0xff;
1319 cgc.cmd[9] = length & 0xff;
1320 return cdo->generic_packet(cdi, &cgc);
1321}
1322
1323static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1324{
1325 struct cdrom_changer_info *info;
1326 int ret;
1327
5944b2ce 1328 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1da177e4
LT		 1329 if (cdi->sanyo_slot)
1330 return CDS_NO_INFO;
1331
1332 info = kmalloc(sizeof(*info), GFP_KERNEL);
1333 if (!info)
1334 return -ENOMEM;
1335
1336 if ((ret = cdrom_read_mech_status(cdi, info)))
1337 goto out_free;
1338
1339 if (info->slots[slot].disc_present)
1340 ret = CDS_DISC_OK;
1341 else
1342 ret = CDS_NO_DISC;
1343
1344out_free:
1345 kfree(info);
1346 return ret;
1347}
1348
1349/* Return the number of slots for an ATAPI/SCSI cdrom,
1350 * return 1 if not a changer.
1351 */
1352int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1353{
1354 int status;
1355 int nslots = 1;
1356 struct cdrom_changer_info *info;
1357
5944b2ce 1358 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1da177e4
LT		 1359 /* cdrom_read_mech_status requires a valid value for capacity: */
1360 cdi->capacity = 0;
1361
1362 info = kmalloc(sizeof(*info), GFP_KERNEL);
1363 if (!info)
1364 return -ENOMEM;
1365
1366 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1367 nslots = info->hdr.nslots;
1368
1369 kfree(info);
1370 return nslots;
1371}
1372
1373
1374/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1375static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1376{
1377 struct packet_command cgc;
1378
5944b2ce 1379 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1da177e4
LT		 1380 if (cdi->sanyo_slot && slot < 0)
1381 return 0;
1382
1383 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1384 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1385 cgc.cmd[4] = 2 + (slot >= 0);
1386 cgc.cmd[8] = slot;
1387 cgc.timeout = 60 * HZ;
1388
1389 /* The Sanyo 3 CD changer uses byte 7 of the
1390 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1391 using the GPCMD_LOAD_UNLOAD opcode. */
1392 if (cdi->sanyo_slot && -1 < slot) {
1393 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1394 cgc.cmd[7] = slot;
1395 cgc.cmd[4] = cgc.cmd[8] = 0;
1396 cdi->sanyo_slot = slot ? slot : 3;
1397 }
1398
1399 return cdi->ops->generic_packet(cdi, &cgc);
1400}
1401
1402static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1403{
1404 struct cdrom_changer_info *info;
1405 int curslot;
1406 int ret;
1407
5944b2ce 1408 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1da177e4
LT		 1409 if (!CDROM_CAN(CDC_SELECT_DISC))
1410 return -EDRIVE_CANT_DO_THIS;
1411
2d921729
TH		 1412 if (cdi->ops->check_events)
1413 cdi->ops->check_events(cdi, 0, slot);
1414 else
1415 cdi->ops->media_changed(cdi, slot);
1da177e4
LT		 1416
1417 if (slot == CDSL_NONE) {
1418 /* set media changed bits, on both queues */
1419 cdi->mc_flags = 0x3;
1420 return cdrom_load_unload(cdi, -1);
1421 }
1422
1423 info = kmalloc(sizeof(*info), GFP_KERNEL);
1424 if (!info)
1425 return -ENOMEM;
1426
1427 if ((ret = cdrom_read_mech_status(cdi, info))) {
1428 kfree(info);
1429 return ret;
1430 }
1431
1432 curslot = info->hdr.curslot;
1433 kfree(info);
1434
cdccaa94 1435 if (cdi->use_count > 1 || cdi->keeplocked) {
1da177e4
LT		 1436 if (slot == CDSL_CURRENT) {
1437 return curslot;
1438 } else {
1439 return -EBUSY;
1440 }
1441 }
1442
1443 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1444 which is useful if it had been previously unloaded.
1445 Whether it can or not, it returns the current slot.
1446 Similarly, if slot happens to be the current one, we still
1447 try and load it. */
1448 if (slot == CDSL_CURRENT)
1449 slot = curslot;
1450
1451 /* set media changed bits on both queues */
1452 cdi->mc_flags = 0x3;
1453 if ((ret = cdrom_load_unload(cdi, slot)))
1454 return ret;
1455
1456 return slot;
1457}
1458
2d921729
TH		 1459/*
1460 * As cdrom implements an extra ioctl consumer for media changed
1461 * event, it needs to buffer ->check_events() output, such that event
1462 * is not lost for both the usual VFS and ioctl paths.
1463 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1464 * path.
1465 *
1466 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1467 * called in parallel and buffering fields are accessed without any
1468 * exclusion. The original media_changed code had the same problem.
1469 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1470 * and remove this cruft altogether. It doesn't have much usefulness
1471 * at this point.
1472 */
1473static void cdrom_update_events(struct cdrom_device_info *cdi,
1474 unsigned int clearing)
1475{
1476 unsigned int events;
1477
1478 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1479 cdi->vfs_events |= events;
1480 cdi->ioctl_events |= events;
1481}
1482
1483unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1484 unsigned int clearing)
1485{
1486 unsigned int events;
1487
1488 cdrom_update_events(cdi, clearing);
1489 events = cdi->vfs_events;
1490 cdi->vfs_events = 0;
1491 return events;
1492}
30a7caab 1493EXPORT_SYMBOL(cdrom_check_events);
2d921729 1494
1da177e4
LT		 1495/* We want to make media_changed accessible to the user through an
1496 * ioctl. The main problem now is that we must double-buffer the
1497 * low-level implementation, to assure that the VFS and the user both
1498 * see a medium change once.
1499 */
1500
1501static
1502int media_changed(struct cdrom_device_info *cdi, int queue)
1503{
1504 unsigned int mask = (1 << (queue & 1));
1505 int ret = !!(cdi->mc_flags & mask);
2d921729 1506 bool changed;
1da177e4
LT		 1507
1508 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2d921729
TH		 1509 return ret;
1510
1da177e4 1511 /* changed since last call? */
2d921729
TH		 1512 if (cdi->ops->check_events) {
1513 BUG_ON(!queue); /* shouldn't be called from VFS path */
1514 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1515 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1516 cdi->ioctl_events = 0;
1517 } else
1518 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1519
1520 if (changed) {
1da177e4
LT		 1521 cdi->mc_flags = 0x3; /* set bit on both queues */
1522 ret |= 1;
1523 cdi->media_written = 0;
1524 }
2d921729 1525
1da177e4
LT		 1526 cdi->mc_flags &= ~mask; /* clear bit */
1527 return ret;
1528}
1529
1530int cdrom_media_changed(struct cdrom_device_info *cdi)
1531{
1532 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1533 * Returning "0" is always safe (media hasn't been changed). Do that
1534 * if the low-level cdrom driver dosn't support media changed. */
1535 if (cdi == NULL || cdi->ops->media_changed == NULL)
1536 return 0;
1537 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1538 return 0;
1539 return media_changed(cdi, 0);
1540}
1541
1da177e4
LT		 1542/* Requests to the low-level drivers will /always/ be done in the
1543 following format convention:
1544
1545 CDROM_LBA: all data-related requests.
1546 CDROM_MSF: all audio-related requests.
1547
1548 However, a low-level implementation is allowed to refuse this
1549 request, and return information in its own favorite format.
1550
1551 It doesn't make sense /at all/ to ask for a play_audio in LBA
1552 format, or ask for multi-session info in MSF format. However, for
1553 backward compatibility these format requests will be satisfied, but
1554 the requests to the low-level drivers will be sanitized in the more
1555 meaningful format indicated above.
1556 */
1557
1558static
1559void sanitize_format(union cdrom_addr *addr,
1560 u_char * curr, u_char requested)
1561{
1562 if (*curr == requested)
1563 return; /* nothing to be done! */
1564 if (requested == CDROM_LBA) {
1565 addr->lba = (int) addr->msf.frame +
1566 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1567 } else { /* CDROM_MSF */
1568 int lba = addr->lba;
1569 addr->msf.frame = lba % 75;
1570 lba /= 75;
1571 lba += 2;
1572 addr->msf.second = lba % 60;
1573 addr->msf.minute = lba / 60;
1574 }
1575 *curr = requested;
1576}
1577
1578void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1579 int type)
1580{
1581 memset(cgc, 0, sizeof(struct packet_command));
1582 if (buf)
1583 memset(buf, 0, len);
1584 cgc->buffer = (char *) buf;
1585 cgc->buflen = len;
1586 cgc->data_direction = type;
2e11c207 1587 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1588}
1589
1590/* DVD handling */
1591
1592#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1593#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1594
1595static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1596{
1597 cgc->cmd[0] = GPCMD_REPORT_KEY;
1598 cgc->cmd[10] = type | (agid << 6);
1599 switch (type) {
1600 case 0: case 8: case 5: {
1601 cgc->buflen = 8;
1602 break;
1603 }
1604 case 1: {
1605 cgc->buflen = 16;
1606 break;
1607 }
1608 case 2: case 4: {
1609 cgc->buflen = 12;
1610 break;
1611 }
1612 }
1613 cgc->cmd[9] = cgc->buflen;
1614 cgc->data_direction = CGC_DATA_READ;
1615}
1616
1617static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1618{
1619 cgc->cmd[0] = GPCMD_SEND_KEY;
1620 cgc->cmd[10] = type | (agid << 6);
1621 switch (type) {
1622 case 1: {
1623 cgc->buflen = 16;
1624 break;
1625 }
1626 case 3: {
1627 cgc->buflen = 12;
1628 break;
1629 }
1630 case 6: {
1631 cgc->buflen = 8;
1632 break;
1633 }
1634 }
1635 cgc->cmd[9] = cgc->buflen;
1636 cgc->data_direction = CGC_DATA_WRITE;
1637}
1638
1639static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1640{
1641 int ret;
fce53847 1642 u_char buf[20];
1da177e4 1643 struct packet_command cgc;
853fe1bf 1644 const struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1645 rpc_state_t rpc_state;
1da177e4 1646
fce53847 1647 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1648 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1649
1650 switch (ai->type) {
1651 /* LU data send */
1652 case DVD_LU_SEND_AGID:
5944b2ce 1653 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1da177e4
LT		 1654 cgc.quiet = 1;
1655 setup_report_key(&cgc, ai->lsa.agid, 0);
1656
1657 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1658 return ret;
1da177e4
LT		 1659
1660 ai->lsa.agid = buf[7] >> 6;
1661 /* Returning data, let host change state */
1662 break;
1663
1664 case DVD_LU_SEND_KEY1:
5944b2ce 1665 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1da177e4
LT		 1666 setup_report_key(&cgc, ai->lsk.agid, 2);
1667
1668 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1669 return ret;
1da177e4
LT		 1670
1671 copy_key(ai->lsk.key, &buf[4]);
1672 /* Returning data, let host change state */
1673 break;
1674
1675 case DVD_LU_SEND_CHALLENGE:
5944b2ce 1676 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1da177e4
LT		 1677 setup_report_key(&cgc, ai->lsc.agid, 1);
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1680 return ret;
1da177e4
LT		 1681
1682 copy_chal(ai->lsc.chal, &buf[4]);
1683 /* Returning data, let host change state */
1684 break;
1685
1686 /* Post-auth key */
1687 case DVD_LU_SEND_TITLE_KEY:
5944b2ce 1688 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1da177e4
LT		 1689 cgc.quiet = 1;
1690 setup_report_key(&cgc, ai->lstk.agid, 4);
1691 cgc.cmd[5] = ai->lstk.lba;
1692 cgc.cmd[4] = ai->lstk.lba >> 8;
1693 cgc.cmd[3] = ai->lstk.lba >> 16;
1694 cgc.cmd[2] = ai->lstk.lba >> 24;
1695
1696 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1697 return ret;
1da177e4
LT		 1698
1699 ai->lstk.cpm = (buf[4] >> 7) & 1;
1700 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1701 ai->lstk.cgms = (buf[4] >> 4) & 3;
1702 copy_key(ai->lstk.title_key, &buf[5]);
1703 /* Returning data, let host change state */
1704 break;
1705
1706 case DVD_LU_SEND_ASF:
5944b2ce 1707 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1da177e4
LT		 1708 setup_report_key(&cgc, ai->lsasf.agid, 5);
1709
1710 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1711 return ret;
1da177e4
LT		 1712
1713 ai->lsasf.asf = buf[7] & 1;
1714 break;
1715
1716 /* LU data receive (LU changes state) */
1717 case DVD_HOST_SEND_CHALLENGE:
5944b2ce 1718 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1da177e4
LT		 1719 setup_send_key(&cgc, ai->hsc.agid, 1);
1720 buf[1] = 0xe;
1721 copy_chal(&buf[4], ai->hsc.chal);
1722
1723 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1724 return ret;
1da177e4
LT		 1725
1726 ai->type = DVD_LU_SEND_KEY1;
1727 break;
1728
1729 case DVD_HOST_SEND_KEY2:
5944b2ce 1730 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1da177e4
LT		 1731 setup_send_key(&cgc, ai->hsk.agid, 3);
1732 buf[1] = 0xa;
1733 copy_key(&buf[4], ai->hsk.key);
1734
1735 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1736 ai->type = DVD_AUTH_FAILURE;
fce53847 1737 return ret;
1da177e4
LT		 1738 }
1739 ai->type = DVD_AUTH_ESTABLISHED;
1740 break;
1741
1742 /* Misc */
1743 case DVD_INVALIDATE_AGID:
1744 cgc.quiet = 1;
5944b2ce 1745 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1da177e4
LT		 1746 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1747 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1748 return ret;
1da177e4
LT		 1749 break;
1750
1751 /* Get region settings */
1752 case DVD_LU_SEND_RPC_STATE:
5944b2ce 1753 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1da177e4 1754 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1755 memset(&rpc_state, 0, sizeof(rpc_state_t));
1756 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1757
1758 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1759 return ret;
1da177e4 1760
fce53847
FT		 1761 ai->lrpcs.type = rpc_state.type_code;
1762 ai->lrpcs.vra = rpc_state.vra;
1763 ai->lrpcs.ucca = rpc_state.ucca;
1764 ai->lrpcs.region_mask = rpc_state.region_mask;
1765 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1766 break;
1767
1768 /* Set region settings */
1769 case DVD_HOST_SEND_RPC_STATE:
5944b2ce 1770 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1da177e4
LT		 1771 setup_send_key(&cgc, 0, 6);
1772 buf[1] = 6;
1773 buf[4] = ai->hrpcs.pdrc;
1774
1775 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1776 return ret;
1da177e4
LT		 1777 break;
1778
1779 default:
5944b2ce 1780 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1781 return -ENOTTY;
1da177e4 1782 }
fce53847
FT		 1783
1784 return 0;
1da177e4
LT		 1785}
1786
d194139c
MS		 1787static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1788 struct packet_command *cgc)
1da177e4 1789{
fce53847 1790 unsigned char buf[21], *base;
1da177e4 1791 struct dvd_layer *layer;
853fe1bf 1792 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1793 int ret, layer_num = s->physical.layer_num;
1794
1795 if (layer_num >= DVD_LAYERS)
1796 return -EINVAL;
1797
d194139c
MS		 1798 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1799 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1800 cgc->cmd[6] = layer_num;
1801 cgc->cmd[7] = s->type;
1802 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4
LT		 1803
1804 /*
1805 * refrain from reporting errors on non-existing layers (mainly)
1806 */
d194139c 1807 cgc->quiet = 1;
1da177e4 1808
d194139c
MS		 1809 ret = cdo->generic_packet(cdi, cgc);
1810 if (ret)
fce53847 1811 return ret;
1da177e4
LT		 1812
1813 base = &buf[4];
1814 layer = &s->physical.layer[layer_num];
1815
1816 /*
1817 * place the data... really ugly, but at least we won't have to
1818 * worry about endianess in userspace.
1819 */
1820 memset(layer, 0, sizeof(*layer));
1821 layer->book_version = base[0] & 0xf;
1822 layer->book_type = base[0] >> 4;
1823 layer->min_rate = base[1] & 0xf;
1824 layer->disc_size = base[1] >> 4;
1825 layer->layer_type = base[2] & 0xf;
1826 layer->track_path = (base[2] >> 4) & 1;
1827 layer->nlayers = (base[2] >> 5) & 3;
1828 layer->track_density = base[3] & 0xf;
1829 layer->linear_density = base[3] >> 4;
1830 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1831 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1832 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1833 layer->bca = base[16] >> 7;
1834
fce53847 1835 return 0;
1da177e4
LT		 1836}
1837
d194139c
MS		 1838static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1839 struct packet_command *cgc)
1da177e4
LT		 1840{
1841 int ret;
fce53847 1842 u_char buf[8];
853fe1bf 1843 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1844
d194139c
MS		 1845 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1846 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1847 cgc->cmd[6] = s->copyright.layer_num;
1848 cgc->cmd[7] = s->type;
1849 cgc->cmd[8] = cgc->buflen >> 8;
1850 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4 1851
d194139c
MS		 1852 ret = cdo->generic_packet(cdi, cgc);
1853 if (ret)
fce53847 1854 return ret;
1da177e4
LT		 1855
1856 s->copyright.cpst = buf[4];
1857 s->copyright.rmi = buf[5];
1858
fce53847 1859 return 0;
1da177e4
LT		 1860}
1861
d194139c
MS		 1862static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1863 struct packet_command *cgc)
1da177e4
LT		 1864{
1865 int ret, size;
1866 u_char *buf;
853fe1bf 1867 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1868
1869 size = sizeof(s->disckey.value) + 4;
1870
d194139c
MS		 1871 buf = kmalloc(size, GFP_KERNEL);
1872 if (!buf)
1da177e4
LT		 1873 return -ENOMEM;
1874
d194139c
MS		 1875 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1876 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1877 cgc->cmd[7] = s->type;
1878 cgc->cmd[8] = size >> 8;
1879 cgc->cmd[9] = size & 0xff;
1880 cgc->cmd[10] = s->disckey.agid << 6;
1da177e4 1881
d194139c
MS		 1882 ret = cdo->generic_packet(cdi, cgc);
1883 if (!ret)
1da177e4
LT		 1884 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1885
1886 kfree(buf);
1887 return ret;
1888}
1889
d194139c
MS		 1890static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1891 struct packet_command *cgc)
1da177e4 1892{
d194139c
MS		 1893 int ret, size = 4 + 188;
1894 u_char *buf;
853fe1bf 1895 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 1896
d194139c
MS		 1897 buf = kmalloc(size, GFP_KERNEL);
1898 if (!buf)
1899 return -ENOMEM;
1da177e4 1900
d194139c
MS		 1901 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1902 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1903 cgc->cmd[7] = s->type;
1904 cgc->cmd[9] = cgc->buflen & 0xff;
1905
1906 ret = cdo->generic_packet(cdi, cgc);
1907 if (ret)
1908 goto out;
1da177e4
LT		 1909
1910 s->bca.len = buf[0] << 8 | buf[1];
1911 if (s->bca.len < 12 || s->bca.len > 188) {
5944b2ce
JP		 1912 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1913 s->bca.len);
d194139c
MS		 1914 ret = -EIO;
1915 goto out;
1da177e4
LT		 1916 }
1917 memcpy(s->bca.value, &buf[4], s->bca.len);
d194139c
MS		 1918 ret = 0;
1919out:
1920 kfree(buf);
1921 return ret;
1da177e4
LT		 1922}
1923
d194139c
MS		 1924static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1925 struct packet_command *cgc)
1da177e4
LT		 1926{
1927 int ret = 0, size;
1928 u_char *buf;
853fe1bf 1929 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1930
1931 size = sizeof(s->manufact.value) + 4;
1932
d194139c
MS		 1933 buf = kmalloc(size, GFP_KERNEL);
1934 if (!buf)
1da177e4
LT		 1935 return -ENOMEM;
1936
d194139c
MS		 1937 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1938 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1939 cgc->cmd[7] = s->type;
1940 cgc->cmd[8] = size >> 8;
1941 cgc->cmd[9] = size & 0xff;
1da177e4 1942
d194139c
MS		 1943 ret = cdo->generic_packet(cdi, cgc);
1944 if (ret)
1945 goto out;
1da177e4
LT		 1946
1947 s->manufact.len = buf[0] << 8 | buf[1];
aec9f377 1948 if (s->manufact.len < 0) {
5944b2ce
JP		 1949 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1950 s->manufact.len);
1da177e4
LT		 1951 ret = -EIO;
1952 } else {
aec9f377 1953 if (s->manufact.len > 2048) {
5944b2ce
JP		 1954 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1955 s->manufact.len);
aec9f377
AM		 1956 s->manufact.len = 2048;
1957 }
1da177e4
LT		 1958 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1959 }
1960
d194139c 1961out:
1da177e4
LT		 1962 kfree(buf);
1963 return ret;
1964}
1965
d194139c
MS		 1966static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1967 struct packet_command *cgc)
1da177e4
LT		 1968{
1969 switch (s->type) {
1970 case DVD_STRUCT_PHYSICAL:
d194139c 1971 return dvd_read_physical(cdi, s, cgc);
1da177e4
LT		 1972
1973 case DVD_STRUCT_COPYRIGHT:
d194139c 1974 return dvd_read_copyright(cdi, s, cgc);
1da177e4
LT		 1975
1976 case DVD_STRUCT_DISCKEY:
d194139c 1977 return dvd_read_disckey(cdi, s, cgc);
1da177e4
LT		 1978
1979 case DVD_STRUCT_BCA:
d194139c 1980 return dvd_read_bca(cdi, s, cgc);
1da177e4
LT		 1981
1982 case DVD_STRUCT_MANUFACT:
d194139c 1983 return dvd_read_manufact(cdi, s, cgc);
1da177e4
LT		 1984
1985 default:
5944b2ce
JP		 1986 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1987 s->type);
1da177e4
LT		 1988 return -EINVAL;
1989 }
1990}
1991
1992int cdrom_mode_sense(struct cdrom_device_info *cdi,
1993 struct packet_command *cgc,
1994 int page_code, int page_control)
1995{
853fe1bf 1996 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 1997
1998 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1999
2000 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2001 cgc->cmd[2] = page_code | (page_control << 6);
2002 cgc->cmd[7] = cgc->buflen >> 8;
2003 cgc->cmd[8] = cgc->buflen & 0xff;
2004 cgc->data_direction = CGC_DATA_READ;
2005 return cdo->generic_packet(cdi, cgc);
2006}
2007
2008int cdrom_mode_select(struct cdrom_device_info *cdi,
2009 struct packet_command *cgc)
2010{
853fe1bf 2011 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2012
2013 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2014 memset(cgc->buffer, 0, 2);
2015 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2016 cgc->cmd[1] = 0x10; /* PF */
2017 cgc->cmd[7] = cgc->buflen >> 8;
2018 cgc->cmd[8] = cgc->buflen & 0xff;
2019 cgc->data_direction = CGC_DATA_WRITE;
2020 return cdo->generic_packet(cdi, cgc);
2021}
2022
2023static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2024 struct cdrom_subchnl *subchnl, int mcn)
2025{
853fe1bf 2026 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4 2027 struct packet_command cgc;
fce53847 2028 char buffer[32];
1da177e4
LT		 2029 int ret;
2030
2031 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2032 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
bf294e83 2033 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
1da177e4
LT		 2034 cgc.cmd[2] = 0x40; /* request subQ data */
2035 cgc.cmd[3] = mcn ? 2 : 1;
2036 cgc.cmd[8] = 16;
2037
2038 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 2039 return ret;
1da177e4
LT		 2040
2041 subchnl->cdsc_audiostatus = cgc.buffer[1];
1da177e4
LT		 2042 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2043 subchnl->cdsc_trk = cgc.buffer[6];
2044 subchnl->cdsc_ind = cgc.buffer[7];
2045
bf294e83 2046 if (subchnl->cdsc_format == CDROM_LBA) {
2047 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2048 (cgc.buffer[9] << 16) |
2049 (cgc.buffer[10] << 8) |
2050 (cgc.buffer[11]));
2051 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2052 (cgc.buffer[13] << 16) |
2053 (cgc.buffer[14] << 8) |
2054 (cgc.buffer[15]));
2055 } else {
2056 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2057 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2058 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2059 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2060 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2061 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2062 }
1da177e4 2063
fce53847 2064 return 0;
1da177e4
LT		 2065}
2066
2067/*
2068 * Specific READ_10 interface
2069 */
2070static int cdrom_read_cd(struct cdrom_device_info *cdi,
2071 struct packet_command *cgc, int lba,
2072 int blocksize, int nblocks)
2073{
853fe1bf 2074 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2075
2076 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2077 cgc->cmd[0] = GPCMD_READ_10;
2078 cgc->cmd[2] = (lba >> 24) & 0xff;
2079 cgc->cmd[3] = (lba >> 16) & 0xff;
2080 cgc->cmd[4] = (lba >> 8) & 0xff;
2081 cgc->cmd[5] = lba & 0xff;
2082 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2083 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2084 cgc->cmd[8] = nblocks & 0xff;
2085 cgc->buflen = blocksize * nblocks;
2086 return cdo->generic_packet(cdi, cgc);
2087}
2088
2089/* very generic interface for reading the various types of blocks */
2090static int cdrom_read_block(struct cdrom_device_info *cdi,
2091 struct packet_command *cgc,
2092 int lba, int nblocks, int format, int blksize)
2093{
853fe1bf 2094 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2095
2096 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2097 cgc->cmd[0] = GPCMD_READ_CD;
2098 /* expected sector size - cdda,mode1,etc. */
2099 cgc->cmd[1] = format << 2;
2100 /* starting address */
2101 cgc->cmd[2] = (lba >> 24) & 0xff;
2102 cgc->cmd[3] = (lba >> 16) & 0xff;
2103 cgc->cmd[4] = (lba >> 8) & 0xff;
2104 cgc->cmd[5] = lba & 0xff;
2105 /* number of blocks */
2106 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2107 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2108 cgc->cmd[8] = nblocks & 0xff;
2109 cgc->buflen = blksize * nblocks;
2110
2111 /* set the header info returned */
2112 switch (blksize) {
2113 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2114 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2115 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2116 default : cgc->cmd[9] = 0x10;
2117 }
2118
2119 return cdo->generic_packet(cdi, cgc);
2120}
2121
2122static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2123 int lba, int nframes)
2124{
2125 struct packet_command cgc;
2126 int ret = 0;
2127 int nr;
2128
2129 cdi->last_sense = 0;
2130
2131 memset(&cgc, 0, sizeof(cgc));
2132
2133 /*
2134 * start with will ra.nframes size, back down if alloc fails
2135 */
2136 nr = nframes;
2137 do {
2138 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2139 if (cgc.buffer)
2140 break;
2141
2142 nr >>= 1;
2143 } while (nr);
2144
2145 if (!nr)
2146 return -ENOMEM;
2147
1da177e4
LT		 2148 cgc.data_direction = CGC_DATA_READ;
2149 while (nframes > 0) {
2150 if (nr > nframes)
2151 nr = nframes;
2152
2153 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2154 if (ret)
2155 break;
822bfa51 2156 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
1da177e4
LT		 2157 ret = -EFAULT;
2158 break;
2159 }
2160 ubuf += CD_FRAMESIZE_RAW * nr;
2161 nframes -= nr;
2162 lba += nr;
2163 }
1da177e4
LT		 2164 kfree(cgc.buffer);
2165 return ret;
2166}
2167
2168static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2169 int lba, int nframes)
2170{
165125e1 2171 struct request_queue *q = cdi->disk->queue;
1da177e4 2172 struct request *rq;
82ed4db4 2173 struct scsi_request *req;
1da177e4
LT		 2174 struct bio *bio;
2175 unsigned int len;
2176 int nr, ret = 0;
2177
2178 if (!q)
2179 return -ENXIO;
2180
73d17701
BVA		 2181 if (!blk_queue_scsi_passthrough(q)) {
2182 WARN_ONCE(true,
2183 "Attempt read CDDA info through a non-SCSI queue\n");
2184 return -EINVAL;
2185 }
2186
1da177e4
LT		 2187 cdi->last_sense = 0;
2188
2189 while (nframes) {
2190 nr = nframes;
2191 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2192 nr = 1;
ae03bf63
MP		 2193 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2194 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
1da177e4
LT		 2195
2196 len = nr * CD_FRAMESIZE_RAW;
2197
aebf526b 2198 rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
a492f075
JL		 2199 if (IS_ERR(rq)) {
2200 ret = PTR_ERR(rq);
febd7a5c
AB		 2201 break;
2202 }
82ed4db4
CH		 2203 req = scsi_req(rq);
2204 scsi_req_init(rq);
febd7a5c 2205
152e283f 2206 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2207 if (ret) {
2208 blk_put_request(rq);
dd1cab95 2209 break;
febd7a5c 2210 }
1da177e4 2211
82ed4db4
CH		 2212 req->cmd[0] = GPCMD_READ_CD;
2213 req->cmd[1] = 1 << 2;
2214 req->cmd[2] = (lba >> 24) & 0xff;
2215 req->cmd[3] = (lba >> 16) & 0xff;
2216 req->cmd[4] = (lba >> 8) & 0xff;
2217 req->cmd[5] = lba & 0xff;
2218 req->cmd[6] = (nr >> 16) & 0xff;
2219 req->cmd[7] = (nr >> 8) & 0xff;
2220 req->cmd[8] = nr & 0xff;
2221 req->cmd[9] = 0xf8;
2222
2223 req->cmd_len = 12;
1da177e4
LT		 2224 rq->timeout = 60 * HZ;
2225 bio = rq->bio;
2226
b7819b92 2227 blk_execute_rq(q, cdi->disk, rq, 0);
17d5363b 2228 if (scsi_req(rq)->result) {
82ed4db4 2229 struct request_sense *s = req->sense;
1da177e4
LT		 2230 ret = -EIO;
2231 cdi->last_sense = s->sense_key;
2232 }
2233
8e5cfc45 2234 if (blk_rq_unmap_user(bio))
1da177e4 2235 ret = -EFAULT;
febd7a5c 2236 blk_put_request(rq);
1da177e4
LT		 2237
2238 if (ret)
2239 break;
2240
2241 nframes -= nr;
2242 lba += nr;
2243 ubuf += len;
2244 }
2245
2246 return ret;
2247}
2248
2249static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2250 int lba, int nframes)
2251{
2252 int ret;
2253
2254 if (cdi->cdda_method == CDDA_OLD)
2255 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2256
2257retry:
2258 /*
2259 * for anything else than success and io error, we need to retry
2260 */
2261 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2262 if (!ret || ret != -EIO)
2263 return ret;
2264
2265 /*
2266 * I've seen drives get sense 4/8/3 udma crc errors on multi
2267 * frame dma, so drop to single frame dma if we need to
2268 */
2269 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
e597cd09 2270 pr_info("dropping to single frame dma\n");
1da177e4
LT		 2271 cdi->cdda_method = CDDA_BPC_SINGLE;
2272 goto retry;
2273 }
2274
2275 /*
2276 * so we have an io error of some sort with multi frame dma. if the
2277 * condition wasn't a hardware error
2278 * problems, not for any error
2279 */
2280 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2281 return ret;
2282
e597cd09 2283 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
1da177e4
LT		 2284 cdi->cdda_method = CDDA_OLD;
2285 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2286}
2287
d2c5d4fc
CH		 2288static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2289 void __user *argp)
1da177e4 2290{
d2c5d4fc
CH		 2291 struct cdrom_multisession ms_info;
2292 u8 requested_format;
1da177e4
LT		 2293 int ret;
2294
5944b2ce 2295 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
d2c5d4fc
CH		 2296
2297 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2298 return -ENOSYS;
2299
2300 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2301 return -EFAULT;
2302
2303 requested_format = ms_info.addr_format;
2304 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2305 return -EINVAL;
2306 ms_info.addr_format = CDROM_LBA;
2307
2308 ret = cdi->ops->get_last_session(cdi, &ms_info);
2309 if (ret)
1da177e4
LT		 2310 return ret;
2311
d2c5d4fc
CH		 2312 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2313
2314 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2315 return -EFAULT;
2316
5944b2ce 2317 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
d2c5d4fc
CH		 2318 return 0;
2319}
2320
2321static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2322{
5944b2ce 2323 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
d2c5d4fc
CH		 2324
2325 if (!CDROM_CAN(CDC_OPEN_TRAY))
2326 return -ENOSYS;
cdccaa94 2327 if (cdi->use_count != 1 || cdi->keeplocked)
d2c5d4fc
CH		 2328 return -EBUSY;
2329 if (CDROM_CAN(CDC_LOCK)) {
2330 int ret = cdi->ops->lock_door(cdi, 0);
2331 if (ret)
1da177e4 2332 return ret;
d2c5d4fc 2333 }
1da177e4 2334
d2c5d4fc
CH		 2335 return cdi->ops->tray_move(cdi, 1);
2336}
1da177e4 2337
d2c5d4fc
CH		 2338static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2339{
5944b2ce 2340 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2341
d2c5d4fc
CH		 2342 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2343 return -ENOSYS;
2344 return cdi->ops->tray_move(cdi, 0);
2345}
1da177e4 2346
d2c5d4fc
CH		 2347static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2348 unsigned long arg)
2349{
5944b2ce 2350 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2351
d2c5d4fc
CH		 2352 if (!CDROM_CAN(CDC_OPEN_TRAY))
2353 return -ENOSYS;
cdccaa94 2354 if (cdi->keeplocked)
d2c5d4fc 2355 return -EBUSY;
1da177e4 2356
d2c5d4fc
CH		 2357 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2358 if (arg)
2359 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2360 return 0;
2361}
1da177e4 2362
d2c5d4fc
CH		 2363static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2364 unsigned long arg)
2365{
2366 struct cdrom_changer_info *info;
2367 int ret;
1da177e4 2368
5944b2ce 2369 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2370
d2c5d4fc
CH		 2371 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2372 return -ENOSYS;
1da177e4 2373
d2c5d4fc
CH		 2374 /* cannot select disc or select current disc */
2375 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2376 return media_changed(cdi, 1);
1da177e4 2377
d2c5d4fc
CH		 2378 if ((unsigned int)arg >= cdi->capacity)
2379 return -EINVAL;
1da177e4 2380
d2c5d4fc
CH		 2381 info = kmalloc(sizeof(*info), GFP_KERNEL);
2382 if (!info)
2383 return -ENOMEM;
1da177e4 2384
d2c5d4fc
CH		 2385 ret = cdrom_read_mech_status(cdi, info);
2386 if (!ret)
2387 ret = info->slots[arg].change;
2388 kfree(info);
2389 return ret;
2390}
1da177e4 2391
d2c5d4fc
CH		 2392static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2393 unsigned long arg)
2394{
5944b2ce 2395 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2396
d2c5d4fc
CH		 2397 /*
2398 * Options need to be in sync with capability.
2399 * Too late for that, so we have to check each one separately.
2400 */
2401 switch (arg) {
2402 case CDO_USE_FFLAGS:
2403 case CDO_CHECK_TYPE:
2404 break;
2405 case CDO_LOCK:
2406 if (!CDROM_CAN(CDC_LOCK))
2407 return -ENOSYS;
2408 break;
2409 case 0:
2410 return cdi->options;
2411 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2412 default:
2413 if (!CDROM_CAN(arg))
1da177e4 2414 return -ENOSYS;
d2c5d4fc
CH		 2415 }
2416 cdi->options |= (int) arg;
2417 return cdi->options;
2418}
1da177e4 2419
d2c5d4fc
CH		 2420static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2421 unsigned long arg)
2422{
5944b2ce 2423 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2424
d2c5d4fc
CH		 2425 cdi->options &= ~(int) arg;
2426 return cdi->options;
2427}
1da177e4 2428
d2c5d4fc
CH		 2429static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2430 unsigned long arg)
2431{
5944b2ce 2432 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2433
d2c5d4fc
CH		 2434 if (!CDROM_CAN(CDC_SELECT_SPEED))
2435 return -ENOSYS;
2436 return cdi->ops->select_speed(cdi, arg);
2437}
1da177e4 2438
d2c5d4fc
CH		 2439static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2440 unsigned long arg)
2441{
5944b2ce 2442 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
d2c5d4fc
CH		 2443
2444 if (!CDROM_CAN(CDC_SELECT_DISC))
2445 return -ENOSYS;
2446
2447 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2448 if ((int)arg >= cdi->capacity)
2449 return -EINVAL;
2450 }
2451
2452 /*
2453 * ->select_disc is a hook to allow a driver-specific way of
2454 * seleting disc. However, since there is no equivalent hook for
2455 * cdrom_slot_status this may not actually be useful...
2456 */
2457 if (cdi->ops->select_disc)
2458 return cdi->ops->select_disc(cdi, arg);
2459
5944b2ce 2460 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
d2c5d4fc
CH		 2461 return cdrom_select_disc(cdi, arg);
2462}
2463
2464static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2465 struct block_device *bdev)
2466{
5944b2ce 2467 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
d2c5d4fc
CH		 2468
2469 if (!capable(CAP_SYS_ADMIN))
2470 return -EACCES;
2471 if (!CDROM_CAN(CDC_RESET))
2472 return -ENOSYS;
f98393a6 2473 invalidate_bdev(bdev);
d2c5d4fc
CH		 2474 return cdi->ops->reset(cdi);
2475}
2476
2477static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2478 unsigned long arg)
2479{
5944b2ce 2480 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
d2c5d4fc
CH		 2481
2482 if (!CDROM_CAN(CDC_LOCK))
2483 return -EDRIVE_CANT_DO_THIS;
2484
cdccaa94 2485 cdi->keeplocked = arg ? 1 : 0;
d2c5d4fc
CH		 2486
2487 /*
2488 * Don't unlock the door on multiple opens by default, but allow
2489 * root to do so.
2490 */
2491 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2492 return -EBUSY;
2493 return cdi->ops->lock_door(cdi, arg);
2494}
2495
2496static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2497 unsigned long arg)
2498{
5944b2ce 2499 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
d2c5d4fc
CH		 2500
2501 if (!capable(CAP_SYS_ADMIN))
2502 return -EACCES;
2503 debug = arg ? 1 : 0;
2504 return debug;
2505}
1da177e4 2506
d2c5d4fc
CH		 2507static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2508{
5944b2ce 2509 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
d2c5d4fc
CH		 2510 return (cdi->ops->capability & ~cdi->mask);
2511}
2512
2513/*
2514 * The following function is implemented, although very few audio
1da177e4
LT		 2515 * discs give Universal Product Code information, which should just be
2516 * the Medium Catalog Number on the box. Note, that the way the code
2517 * is written on the CD is /not/ uniform across all discs!
2518 */
d2c5d4fc
CH		 2519static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2520 void __user *argp)
2521{
2522 struct cdrom_mcn mcn;
2523 int ret;
1da177e4 2524
5944b2ce 2525 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2526
d2c5d4fc
CH		 2527 if (!(cdi->ops->capability & CDC_MCN))
2528 return -ENOSYS;
2529 ret = cdi->ops->get_mcn(cdi, &mcn);
2530 if (ret)
2531 return ret;
1da177e4 2532
d2c5d4fc
CH		 2533 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2534 return -EFAULT;
5944b2ce 2535 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
d2c5d4fc
CH		 2536 return 0;
2537}
1da177e4 2538
d2c5d4fc
CH		 2539static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2540 unsigned long arg)
2541{
5944b2ce 2542 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
d2c5d4fc
CH		 2543
2544 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2545 return -ENOSYS;
2546 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2547 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2548 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2549 if (((int)arg >= cdi->capacity))
2550 return -EINVAL;
2551 return cdrom_slot_status(cdi, arg);
2552}
2553
2554/*
2555 * Ok, this is where problems start. The current interface for the
2556 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
25985edc 2557 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
d2c5d4fc
CH		 2558 * is often the case, it is also very common for CDs to have some tracks
2559 * with data, and some tracks with audio. Just because I feel like it,
2560 * I declare the following to be the best way to cope. If the CD has ANY
2561 * data tracks on it, it will be returned as a data CD. If it has any XA
2562 * tracks, I will return it as that. Now I could simplify this interface
2563 * by combining these returns with the above, but this more clearly
2564 * demonstrates the problem with the current interface. Too bad this
2565 * wasn't designed to use bitmasks... -Erik
2566 *
2567 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2568 * User level programmers might feel the ioctl is not very useful.
2569 * ---david
2570 */
2571static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2572{
2573 tracktype tracks;
2574
5944b2ce 2575 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
d2c5d4fc
CH		 2576
2577 cdrom_count_tracks(cdi, &tracks);
2578 if (tracks.error)
2579 return tracks.error;
2580
2581 /* Policy mode on */
2582 if (tracks.audio > 0) {
2583 if (!tracks.data && !tracks.cdi && !tracks.xa)
2584 return CDS_AUDIO;
2585 else
2586 return CDS_MIXED;
1da177e4
LT		 2587 }
2588
d2c5d4fc
CH		 2589 if (tracks.cdi > 0)
2590 return CDS_XA_2_2;
2591 if (tracks.xa > 0)
2592 return CDS_XA_2_1;
2593 if (tracks.data > 0)
2594 return CDS_DATA_1;
2595 /* Policy mode off */
2596
5944b2ce 2597 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
d2c5d4fc
CH		 2598 return CDS_NO_INFO;
2599}
2600
2601static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2602{
5944b2ce 2603 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
d2c5d4fc
CH		 2604 return cdi->capacity;
2605}
2606
2607static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2608 void __user *argp)
2609{
2610 struct cdrom_subchnl q;
2611 u8 requested, back;
2612 int ret;
2613
5944b2ce 2614 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
d2c5d4fc 2615
d2c5d4fc
CH		 2616 if (copy_from_user(&q, argp, sizeof(q)))
2617 return -EFAULT;
2618
2619 requested = q.cdsc_format;
2620 if (requested != CDROM_MSF && requested != CDROM_LBA)
2621 return -EINVAL;
2622 q.cdsc_format = CDROM_MSF;
2623
2624 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2625 if (ret)
2626 return ret;
2627
2628 back = q.cdsc_format; /* local copy */
2629 sanitize_format(&q.cdsc_absaddr, &back, requested);
2630 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2631
2632 if (copy_to_user(argp, &q, sizeof(q)))
2633 return -EFAULT;
5944b2ce 2634 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
d2c5d4fc
CH		 2635 return 0;
2636}
2637
2638static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2639 void __user *argp)
2640{
2641 struct cdrom_tochdr header;
2642 int ret;
2643
5944b2ce 2644 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
d2c5d4fc 2645
d2c5d4fc
CH		 2646 if (copy_from_user(&header, argp, sizeof(header)))
2647 return -EFAULT;
2648
2649 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2650 if (ret)
2651 return ret;
2652
2653 if (copy_to_user(argp, &header, sizeof(header)))
2654 return -EFAULT;
5944b2ce 2655 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
d2c5d4fc
CH		 2656 return 0;
2657}
2658
2659static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2660 void __user *argp)
2661{
2662 struct cdrom_tocentry entry;
2663 u8 requested_format;
2664 int ret;
2665
5944b2ce 2666 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
d2c5d4fc 2667
d2c5d4fc
CH		 2668 if (copy_from_user(&entry, argp, sizeof(entry)))
2669 return -EFAULT;
2670
2671 requested_format = entry.cdte_format;
2672 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2673 return -EINVAL;
2674 /* make interface to low-level uniform */
2675 entry.cdte_format = CDROM_MSF;
2676 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2677 if (ret)
2678 return ret;
2679 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2680
2681 if (copy_to_user(argp, &entry, sizeof(entry)))
2682 return -EFAULT;
5944b2ce 2683 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
d2c5d4fc
CH		 2684 return 0;
2685}
2686
2687static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2688 void __user *argp)
2689{
2690 struct cdrom_msf msf;
2691
5944b2ce 2692 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
d2c5d4fc
CH		 2693
2694 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2695 return -ENOSYS;
2696 if (copy_from_user(&msf, argp, sizeof(msf)))
2697 return -EFAULT;
2698 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2699}
2700
2701static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2702 void __user *argp)
2703{
2704 struct cdrom_ti ti;
2705 int ret;
2706
5944b2ce 2707 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
d2c5d4fc
CH		 2708
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710 return -ENOSYS;
2711 if (copy_from_user(&ti, argp, sizeof(ti)))
2712 return -EFAULT;
2713
2714 ret = check_for_audio_disc(cdi, cdi->ops);
2715 if (ret)
2716 return ret;
2717 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2718}
2719static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2720 void __user *argp)
2721{
2722 struct cdrom_volctrl volume;
2723
5944b2ce 2724 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
d2c5d4fc
CH		 2725
2726 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2727 return -ENOSYS;
2728 if (copy_from_user(&volume, argp, sizeof(volume)))
2729 return -EFAULT;
2730 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2731}
2732
2733static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2734 void __user *argp)
2735{
2736 struct cdrom_volctrl volume;
2737 int ret;
2738
5944b2ce 2739 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
d2c5d4fc
CH		 2740
2741 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2742 return -ENOSYS;
2743
2744 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2745 if (ret)
2746 return ret;
2747
2748 if (copy_to_user(argp, &volume, sizeof(volume)))
2749 return -EFAULT;
2750 return 0;
2751}
2752
2753static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2754 unsigned int cmd)
2755{
2756 int ret;
2757
5944b2ce 2758 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
d2c5d4fc
CH		 2759
2760 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2761 return -ENOSYS;
2762 ret = check_for_audio_disc(cdi, cdi->ops);
2763 if (ret)
2764 return ret;
2765 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2766}
2767
1da177e4
LT		 2768/*
2769 * Required when we need to use READ_10 to issue other than 2048 block
2770 * reads
2771 */
2772static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2773{
853fe1bf 2774 const struct cdrom_device_ops *cdo = cdi->ops;
1da177e4
LT		 2775 struct packet_command cgc;
2776 struct modesel_head mh;
2777
2778 memset(&mh, 0, sizeof(mh));
2779 mh.block_desc_length = 0x08;
2780 mh.block_length_med = (size >> 8) & 0xff;
2781 mh.block_length_lo = size & 0xff;
2782
2783 memset(&cgc, 0, sizeof(cgc));
2784 cgc.cmd[0] = 0x15;
2785 cgc.cmd[1] = 1 << 4;
2786 cgc.cmd[4] = 12;
2787 cgc.buflen = sizeof(mh);
2788 cgc.buffer = (char *) &mh;
2789 cgc.data_direction = CGC_DATA_WRITE;
2790 mh.block_desc_length = 0x08;
2791 mh.block_length_med = (size >> 8) & 0xff;
2792 mh.block_length_lo = size & 0xff;
2793
2794 return cdo->generic_packet(cdi, &cgc);
2795}
2796
e1e60fda
JP		 2797static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2798 __u16 track, __u8 type, track_information *ti)
2799{
853fe1bf 2800 const struct cdrom_device_ops *cdo = cdi->ops;
e1e60fda
JP		 2801 struct packet_command cgc;
2802 int ret, buflen;
2803
2804 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2805 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2806 cgc.cmd[1] = type & 3;
2807 cgc.cmd[4] = (track & 0xff00) >> 8;
2808 cgc.cmd[5] = track & 0xff;
2809 cgc.cmd[8] = 8;
2810 cgc.quiet = 1;
2811
2812 ret = cdo->generic_packet(cdi, &cgc);
2813 if (ret)
2814 return ret;
2815
2816 buflen = be16_to_cpu(ti->track_information_length) +
2817 sizeof(ti->track_information_length);
2818
2819 if (buflen > sizeof(track_information))
2820 buflen = sizeof(track_information);
2821
2822 cgc.cmd[8] = cgc.buflen = buflen;
2823 ret = cdo->generic_packet(cdi, &cgc);
2824 if (ret)
2825 return ret;
2826
2827 /* return actual fill size */
2828 return buflen;
2829}
2830
2831/* return the last written block on the CD-R media. this is for the udf
2832 file system. */
2833int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2834{
2835 struct cdrom_tocentry toc;
2836 disc_information di;
2837 track_information ti;
2838 __u32 last_track;
2839 int ret = -1, ti_size;
2840
2841 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2842 goto use_toc;
2843
2844 ret = cdrom_get_disc_info(cdi, &di);
2845 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2846 + sizeof(di.last_track_lsb)))
2847 goto use_toc;
2848
2849 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2850 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2851 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2852 if (ti_size < (int)offsetof(typeof(ti), track_start))
2853 goto use_toc;
2854
2855 /* if this track is blank, try the previous. */
2856 if (ti.blank) {
2857 if (last_track == 1)
2858 goto use_toc;
2859 last_track--;
2860 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2861 }
2862
2863 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2864 + sizeof(ti.track_size)))
2865 goto use_toc;
2866
2867 /* if last recorded field is valid, return it. */
2868 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2869 + sizeof(ti.last_rec_address))) {
2870 *last_written = be32_to_cpu(ti.last_rec_address);
2871 } else {
2872 /* make it up instead */
2873 *last_written = be32_to_cpu(ti.track_start) +
2874 be32_to_cpu(ti.track_size);
2875 if (ti.free_blocks)
2876 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2877 }
2878 return 0;
2879
2880 /* this is where we end up if the drive either can't do a
2881 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2882 it doesn't give enough information or fails. then we return
2883 the toc contents. */
2884use_toc:
2885 toc.cdte_format = CDROM_MSF;
2886 toc.cdte_track = CDROM_LEADOUT;
2887 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2888 return ret;
2889 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2890 *last_written = toc.cdte_addr.lba;
2891 return 0;
2892}
2893
dac1c5cf
JP		 2894/* return the next writable block. also for udf file system. */
2895static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2896 long *next_writable)
2897{
2898 disc_information di;
2899 track_information ti;
2900 __u16 last_track;
2901 int ret, ti_size;
2902
2903 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2904 goto use_last_written;
2905
2906 ret = cdrom_get_disc_info(cdi, &di);
2907 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2908 + sizeof(di.last_track_lsb))
2909 goto use_last_written;
2910
2911 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2912 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2913 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2914 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2915 goto use_last_written;
2916
2917 /* if this track is blank, try the previous. */
2918 if (ti.blank) {
2919 if (last_track == 1)
2920 goto use_last_written;
2921 last_track--;
2922 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2923 if (ti_size < 0)
2924 goto use_last_written;
2925 }
2926
2927 /* if next recordable address field is valid, use it. */
2928 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2929 + sizeof(ti.next_writable)) {
2930 *next_writable = be32_to_cpu(ti.next_writable);
2931 return 0;
2932 }
2933
2934use_last_written:
2935 ret = cdrom_get_last_written(cdi, next_writable);
2936 if (ret) {
2937 *next_writable = 0;
2938 return ret;
2939 } else {
2940 *next_writable += 7;
2941 return 0;
2942 }
2943}
2944
3147c531 2945static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2e9aa08a
JP		 2946 void __user *arg,
2947 struct packet_command *cgc,
2948 int cmd)
3147c531 2949{
1da177e4 2950 struct request_sense sense;
3147c531
MS		 2951 struct cdrom_msf msf;
2952 int blocksize = 0, format = 0, lba;
2953 int ret;
1da177e4 2954
1da177e4
LT		 2955 switch (cmd) {
2956 case CDROMREADRAW:
3147c531
MS		 2957 blocksize = CD_FRAMESIZE_RAW;
2958 break;
1da177e4 2959 case CDROMREADMODE1:
3147c531
MS		 2960 blocksize = CD_FRAMESIZE;
2961 format = 2;
2962 break;
2963 case CDROMREADMODE2:
2964 blocksize = CD_FRAMESIZE_RAW0;
2965 break;
2966 }
a09c391d
JP		 2967 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2968 return -EFAULT;
3147c531
MS		 2969 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2970 /* FIXME: we need upper bound checking, too!! */
2971 if (lba < 0)
2972 return -EINVAL;
2973
542db015 2974 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
3147c531
MS		 2975 if (cgc->buffer == NULL)
2976 return -ENOMEM;
2977
2978 memset(&sense, 0, sizeof(sense));
2979 cgc->sense = &sense;
2980 cgc->data_direction = CGC_DATA_READ;
2981 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2982 if (ret && sense.sense_key == 0x05 &&
2e9aa08a
JP		 2983 sense.asc == 0x20 &&
2984 sense.ascq == 0x00) {
3147c531
MS		 2985 /*
2986 * SCSI-II devices are not required to support
2987 * READ_CD, so let's try switching block size
2988 */
2989 /* FIXME: switch back again... */
2990 ret = cdrom_switch_blocksize(cdi, blocksize);
2991 if (ret)
2992 goto out;
2993 cgc->sense = NULL;
2994 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2995 ret |= cdrom_switch_blocksize(cdi, blocksize);
2996 }
2997 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2998 ret = -EFAULT;
2999out:
3000 kfree(cgc->buffer);
3001 return ret;
3002}
3003
3004static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2e9aa08a 3005 void __user *arg)
3147c531
MS		 3006{
3007 struct cdrom_read_audio ra;
3008 int lba;
3009
a09c391d
JP		 3010 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3011 sizeof(ra)))
3012 return -EFAULT;
3147c531
MS		 3013
3014 if (ra.addr_format == CDROM_MSF)
3015 lba = msf_to_lba(ra.addr.msf.minute,
3016 ra.addr.msf.second,
3017 ra.addr.msf.frame);
3018 else if (ra.addr_format == CDROM_LBA)
3019 lba = ra.addr.lba;
3020 else
3021 return -EINVAL;
3022
3023 /* FIXME: we need upper bound checking, too!! */
3024 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3025 return -EINVAL;
3026
3027 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3028}
3029
3030static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2e9aa08a 3031 void __user *arg)
3147c531
MS		 3032{
3033 int ret;
3034 struct cdrom_subchnl q;
3035 u_char requested, back;
a09c391d
JP		 3036 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3037 return -EFAULT;
3147c531
MS		 3038 requested = q.cdsc_format;
3039 if (!((requested == CDROM_MSF) ||
3040 (requested == CDROM_LBA)))
3041 return -EINVAL;
bf294e83 3042
3147c531
MS		 3043 ret = cdrom_read_subchannel(cdi, &q, 0);
3044 if (ret)
1da177e4 3045 return ret;
3147c531
MS		 3046 back = q.cdsc_format; /* local copy */
3047 sanitize_format(&q.cdsc_absaddr, &back, requested);
3048 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
a09c391d
JP		 3049 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3050 return -EFAULT;
5944b2ce 3051 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3147c531
MS		 3052 return 0;
3053}
1da177e4 3054
3147c531 3055static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3056 void __user *arg,
3057 struct packet_command *cgc)
3147c531 3058{
853fe1bf 3059 const struct cdrom_device_ops *cdo = cdi->ops;
3147c531 3060 struct cdrom_msf msf;
5944b2ce 3061 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
a09c391d
JP		 3062 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3063 return -EFAULT;
3147c531
MS		 3064 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3065 cgc->cmd[3] = msf.cdmsf_min0;
3066 cgc->cmd[4] = msf.cdmsf_sec0;
3067 cgc->cmd[5] = msf.cdmsf_frame0;
3068 cgc->cmd[6] = msf.cdmsf_min1;
3069 cgc->cmd[7] = msf.cdmsf_sec1;
3070 cgc->cmd[8] = msf.cdmsf_frame1;
3071 cgc->data_direction = CGC_DATA_NONE;
3072 return cdo->generic_packet(cdi, cgc);
3073}
1da177e4 3074
3147c531 3075static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3076 void __user *arg,
3077 struct packet_command *cgc)
3147c531 3078{
853fe1bf 3079 const struct cdrom_device_ops *cdo = cdi->ops;
3147c531 3080 struct cdrom_blk blk;
5944b2ce 3081 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
a09c391d
JP		 3082 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3083 return -EFAULT;
3147c531
MS		 3084 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3085 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3086 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3087 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3088 cgc->cmd[5] = blk.from & 0xff;
3089 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3090 cgc->cmd[8] = blk.len & 0xff;
3091 cgc->data_direction = CGC_DATA_NONE;
3092 return cdo->generic_packet(cdi, cgc);
3093}
1da177e4 3094
3147c531 3095static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3096 void __user *arg,
3097 struct packet_command *cgc,
3098 unsigned int cmd)
3147c531
MS		 3099{
3100 struct cdrom_volctrl volctrl;
3101 unsigned char buffer[32];
3102 char mask[sizeof(buffer)];
3103 unsigned short offset;
3104 int ret;
3105
5944b2ce 3106 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
1da177e4 3107
a09c391d
JP		 3108 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3109 sizeof(volctrl)))
3110 return -EFAULT;
1da177e4 3111
3147c531
MS		 3112 cgc->buffer = buffer;
3113 cgc->buflen = 24;
3114 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3115 if (ret)
3116 return ret;
1da177e4 3117
3147c531
MS		 3118 /* originally the code depended on buffer[1] to determine
3119 how much data is available for transfer. buffer[1] is
3120 unfortunately ambigious and the only reliable way seem
3121 to be to simply skip over the block descriptor... */
3122 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3123
3124 if (offset + 16 > sizeof(buffer))
3125 return -E2BIG;
3126
3127 if (offset + 16 > cgc->buflen) {
3128 cgc->buflen = offset + 16;
3129 ret = cdrom_mode_sense(cdi, cgc,
2e9aa08a 3130 GPMODE_AUDIO_CTL_PAGE, 0);
3147c531
MS		 3131 if (ret)
3132 return ret;
3133 }
1da177e4 3134
3147c531
MS		 3135 /* sanity check */
3136 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2e9aa08a 3137 buffer[offset + 1] < 14)
3147c531 3138 return -EINVAL;
1da177e4 3139
3147c531
MS		 3140 /* now we have the current volume settings. if it was only
3141 a CDROMVOLREAD, return these values */
3142 if (cmd == CDROMVOLREAD) {
3143 volctrl.channel0 = buffer[offset+9];
3144 volctrl.channel1 = buffer[offset+11];
3145 volctrl.channel2 = buffer[offset+13];
3146 volctrl.channel3 = buffer[offset+15];
a09c391d
JP		 3147 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3148 sizeof(volctrl)))
3149 return -EFAULT;
3147c531
MS		 3150 return 0;
3151 }
1da177e4 3152
3147c531
MS		 3153 /* get the volume mask */
3154 cgc->buffer = mask;
3155 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3156 if (ret)
3157 return ret;
1da177e4 3158
3147c531
MS		 3159 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3160 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3161 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3162 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
1da177e4 3163
3147c531
MS		 3164 /* set volume */
3165 cgc->buffer = buffer + offset - 8;
3166 memset(cgc->buffer, 0, 8);
3167 return cdrom_mode_select(cdi, cgc);
3168}
1da177e4 3169
3147c531 3170static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3171 struct packet_command *cgc,
3172 int cmd)
3147c531 3173{
853fe1bf 3174 const struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3175 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3147c531
MS		 3176 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3177 cgc->cmd[1] = 1;
3178 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3179 cgc->data_direction = CGC_DATA_NONE;
3180 return cdo->generic_packet(cdi, cgc);
3181}
1da177e4 3182
3147c531 3183static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3184 struct packet_command *cgc,
3185 int cmd)
3147c531 3186{
853fe1bf 3187 const struct cdrom_device_ops *cdo = cdi->ops;
5944b2ce 3188 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3147c531
MS		 3189 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3190 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3191 cgc->data_direction = CGC_DATA_NONE;
3192 return cdo->generic_packet(cdi, cgc);
3193}
1da177e4 3194
3147c531 3195static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
2e9aa08a
JP		 3196 void __user *arg,
3197 struct packet_command *cgc)
3147c531
MS		 3198{
3199 int ret;
3200 dvd_struct *s;
3201 int size = sizeof(dvd_struct);
3202
3203 if (!CDROM_CAN(CDC_DVD))
3204 return -ENOSYS;
3205
abb0f6a7
AV		 3206 s = memdup_user(arg, size);
3207 if (IS_ERR(s))
3208 return PTR_ERR(s);
3147c531 3209
5944b2ce 3210 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3147c531 3211
d194139c 3212 ret = dvd_read_struct(cdi, s, cgc);
3147c531
MS		 3213 if (ret)
3214 goto out;
3215
3216 if (copy_to_user(arg, s, size))
3217 ret = -EFAULT;
3218out:
3219 kfree(s);
3220 return ret;
3221}
3222
3223static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
2e9aa08a 3224 void __user *arg)
3147c531
MS		 3225{
3226 int ret;
3227 dvd_authinfo ai;
3228 if (!CDROM_CAN(CDC_DVD))
3229 return -ENOSYS;
5944b2ce 3230 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
a09c391d
JP		 3231 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3232 return -EFAULT;
3147c531
MS		 3233 ret = dvd_do_auth(cdi, &ai);
3234 if (ret)
1da177e4 3235 return ret;
a09c391d
JP		 3236 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3237 return -EFAULT;
3147c531
MS		 3238 return 0;
3239}
1da177e4 3240
3147c531 3241static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
2e9aa08a 3242 void __user *arg)
3147c531
MS		 3243{
3244 int ret;
3245 long next = 0;
5944b2ce 3246 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3147c531
MS		 3247 ret = cdrom_get_next_writable(cdi, &next);
3248 if (ret)
3249 return ret;
a09c391d
JP		 3250 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3251 return -EFAULT;
3147c531
MS		 3252 return 0;
3253}
1da177e4 3254
3147c531 3255static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
2e9aa08a 3256 void __user *arg)
3147c531
MS		 3257{
3258 int ret;
3259 long last = 0;
5944b2ce 3260 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3147c531
MS		 3261 ret = cdrom_get_last_written(cdi, &last);
3262 if (ret)
3263 return ret;
a09c391d
JP		 3264 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3265 return -EFAULT;
3147c531
MS		 3266 return 0;
3267}
3268
3269static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3270 unsigned long arg)
3271{
3272 struct packet_command cgc;
3273 void __user *userptr = (void __user *)arg;
3274
3275 memset(&cgc, 0, sizeof(cgc));
3276
3277 /* build a unified command and queue it through
3278 cdo->generic_packet() */
3279 switch (cmd) {
3280 case CDROMREADRAW:
3281 case CDROMREADMODE1:
3282 case CDROMREADMODE2:
3283 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3284 case CDROMREADAUDIO:
3285 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3286 case CDROMSUBCHNL:
3287 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3288 case CDROMPLAYMSF:
3289 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3290 case CDROMPLAYBLK:
3291 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3292 case CDROMVOLCTRL:
3293 case CDROMVOLREAD:
3294 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3295 case CDROMSTART:
3296 case CDROMSTOP:
3297 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3298 case CDROMPAUSE:
3299 case CDROMRESUME:
3300 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3301 case DVD_READ_STRUCT:
d194139c 3302 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3147c531
MS		 3303 case DVD_AUTH:
3304 return mmc_ioctl_dvd_auth(cdi, userptr);
3305 case CDROM_NEXT_WRITABLE:
3306 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3307 case CDROM_LAST_WRITTEN:
3308 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3309 }
1da177e4
LT		 3310
3311 return -ENOTTY;
3312}
3313
2e9aa08a
JP		 3314/*
3315 * Just about every imaginable ioctl is supported in the Uniform layer
3316 * these days.
3317 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3318 */
3319int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3320 fmode_t mode, unsigned int cmd, unsigned long arg)
3321{
3322 void __user *argp = (void __user *)arg;
3323 int ret;
3324
3325 /*
3326 * Try the generic SCSI command ioctl's first.
3327 */
3328 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3329 if (ret != -ENOTTY)
3330 return ret;
3331
3332 switch (cmd) {
3333 case CDROMMULTISESSION:
3334 return cdrom_ioctl_multisession(cdi, argp);
3335 case CDROMEJECT:
3336 return cdrom_ioctl_eject(cdi);
3337 case CDROMCLOSETRAY:
3338 return cdrom_ioctl_closetray(cdi);
3339 case CDROMEJECT_SW:
3340 return cdrom_ioctl_eject_sw(cdi, arg);
3341 case CDROM_MEDIA_CHANGED:
3342 return cdrom_ioctl_media_changed(cdi, arg);
3343 case CDROM_SET_OPTIONS:
3344 return cdrom_ioctl_set_options(cdi, arg);
3345 case CDROM_CLEAR_OPTIONS:
3346 return cdrom_ioctl_clear_options(cdi, arg);
3347 case CDROM_SELECT_SPEED:
3348 return cdrom_ioctl_select_speed(cdi, arg);
3349 case CDROM_SELECT_DISC:
3350 return cdrom_ioctl_select_disc(cdi, arg);
3351 case CDROMRESET:
3352 return cdrom_ioctl_reset(cdi, bdev);
3353 case CDROM_LOCKDOOR:
3354 return cdrom_ioctl_lock_door(cdi, arg);
3355 case CDROM_DEBUG:
3356 return cdrom_ioctl_debug(cdi, arg);
3357 case CDROM_GET_CAPABILITY:
3358 return cdrom_ioctl_get_capability(cdi);
3359 case CDROM_GET_MCN:
3360 return cdrom_ioctl_get_mcn(cdi, argp);
3361 case CDROM_DRIVE_STATUS:
3362 return cdrom_ioctl_drive_status(cdi, arg);
3363 case CDROM_DISC_STATUS:
3364 return cdrom_ioctl_disc_status(cdi);
3365 case CDROM_CHANGER_NSLOTS:
3366 return cdrom_ioctl_changer_nslots(cdi);
3367 }
3368
3369 /*
3370 * Use the ioctls that are implemented through the generic_packet()
3371 * interface. this may look at bit funny, but if -ENOTTY is
3372 * returned that particular ioctl is not implemented and we
3373 * let it go through the device specific ones.
3374 */
3375 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3376 ret = mmc_ioctl(cdi, cmd, arg);
3377 if (ret != -ENOTTY)
3378 return ret;
3379 }
3380
3381 /*
3382 * Note: most of the cd_dbg() calls are commented out here,
3383 * because they fill up the sys log when CD players poll
3384 * the drive.
3385 */
3386 switch (cmd) {
3387 case CDROMSUBCHNL:
3388 return cdrom_ioctl_get_subchnl(cdi, argp);
3389 case CDROMREADTOCHDR:
3390 return cdrom_ioctl_read_tochdr(cdi, argp);
3391 case CDROMREADTOCENTRY:
3392 return cdrom_ioctl_read_tocentry(cdi, argp);
3393 case CDROMPLAYMSF:
3394 return cdrom_ioctl_play_msf(cdi, argp);
3395 case CDROMPLAYTRKIND:
3396 return cdrom_ioctl_play_trkind(cdi, argp);
3397 case CDROMVOLCTRL:
3398 return cdrom_ioctl_volctrl(cdi, argp);
3399 case CDROMVOLREAD:
3400 return cdrom_ioctl_volread(cdi, argp);
3401 case CDROMSTART:
3402 case CDROMSTOP:
3403 case CDROMPAUSE:
3404 case CDROMRESUME:
3405 return cdrom_ioctl_audioctl(cdi, cmd);
3406 }
3407
3408 return -ENOSYS;
3409}
3410
1da177e4
LT		 3411EXPORT_SYMBOL(cdrom_get_last_written);
3412EXPORT_SYMBOL(register_cdrom);
3413EXPORT_SYMBOL(unregister_cdrom);
3414EXPORT_SYMBOL(cdrom_open);
3415EXPORT_SYMBOL(cdrom_release);
3416EXPORT_SYMBOL(cdrom_ioctl);
3417EXPORT_SYMBOL(cdrom_media_changed);
3418EXPORT_SYMBOL(cdrom_number_of_slots);
3419EXPORT_SYMBOL(cdrom_mode_select);
3420EXPORT_SYMBOL(cdrom_mode_sense);
3421EXPORT_SYMBOL(init_cdrom_command);
3422EXPORT_SYMBOL(cdrom_get_media_event);
3423
3424#ifdef CONFIG_SYSCTL
3425
3426#define CDROM_STR_SIZE 1000
3427
3428static struct cdrom_sysctl_settings {
3429 char info[CDROM_STR_SIZE]; /* general info */
3430 int autoclose; /* close tray upon mount, etc */
3431 int autoeject; /* eject on umount */
3432 int debug; /* turn on debugging messages */
3433 int lock; /* lock the door on device open */
3434 int check; /* check media type */
3435} cdrom_sysctl_settings;
3436
554988d6
DY		 3437enum cdrom_print_option {
3438 CTL_NAME,
3439 CTL_SPEED,
3440 CTL_SLOTS,
3441 CTL_CAPABILITY
3442};
3443
3444static int cdrom_print_info(const char *header, int val, char *info,
3445 int *pos, enum cdrom_print_option option)
3446{
3447 const int max_size = sizeof(cdrom_sysctl_settings.info);
3448 struct cdrom_device_info *cdi;
3449 int ret;
3450
3451 ret = scnprintf(info + *pos, max_size - *pos, header);
3452 if (!ret)
3453 return 1;
3454
3455 *pos += ret;
3456
7fd097d4 3457 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3458 switch (option) {
3459 case CTL_NAME:
3460 ret = scnprintf(info + *pos, max_size - *pos,
3461 "\t%s", cdi->name);
3462 break;
3463 case CTL_SPEED:
3464 ret = scnprintf(info + *pos, max_size - *pos,
3465 "\t%d", cdi->speed);
3466 break;
3467 case CTL_SLOTS:
3468 ret = scnprintf(info + *pos, max_size - *pos,
3469 "\t%d", cdi->capacity);
3470 break;
3471 case CTL_CAPABILITY:
3472 ret = scnprintf(info + *pos, max_size - *pos,
3473 "\t%d", CDROM_CAN(val) != 0);
3474 break;
3475 default:
e597cd09 3476 pr_info("invalid option%d\n", option);
554988d6
DY		 3477 return 1;
3478 }
3479 if (!ret)
3480 return 1;
3481 *pos += ret;
3482 }
3483
3484 return 0;
3485}
3486
90a3b89e 3487static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
1da177e4
LT		 3488 void __user *buffer, size_t *lenp, loff_t *ppos)
3489{
554988d6 3490 int pos;
1da177e4 3491 char *info = cdrom_sysctl_settings.info;
554988d6 3492 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3493
3494 if (!*lenp || (*ppos && !write)) {
3495 *lenp = 0;
3496 return 0;
3497 }
3498
554988d6
DY		 3499 mutex_lock(&cdrom_mutex);
3500
1da177e4
LT		 3501 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3502
554988d6
DY		 3503 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3504 goto done;
3505 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3506 goto done;
3507 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3508 goto done;
3509 if (cdrom_print_info("\nCan close tray:\t",
3510 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3511 goto done;
3512 if (cdrom_print_info("\nCan open tray:\t",
3513 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3514 goto done;
3515 if (cdrom_print_info("\nCan lock tray:\t",
3516 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3517 goto done;
3518 if (cdrom_print_info("\nCan change speed:",
3519 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3520 goto done;
3521 if (cdrom_print_info("\nCan select disk:",
3522 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3523 goto done;
3524 if (cdrom_print_info("\nCan read multisession:",
3525 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3526 goto done;
3527 if (cdrom_print_info("\nCan read MCN:\t",
3528 CDC_MCN, info, &pos, CTL_CAPABILITY))
3529 goto done;
3530 if (cdrom_print_info("\nReports media changed:",
3531 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3532 goto done;
3533 if (cdrom_print_info("\nCan play audio:\t",
3534 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3535 goto done;
3536 if (cdrom_print_info("\nCan write CD-R:\t",
3537 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3538 goto done;
3539 if (cdrom_print_info("\nCan write CD-RW:",
3540 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3541 goto done;
3542 if (cdrom_print_info("\nCan read DVD:\t",
3543 CDC_DVD, info, &pos, CTL_CAPABILITY))
3544 goto done;
3545 if (cdrom_print_info("\nCan write DVD-R:",
3546 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3547 goto done;
3548 if (cdrom_print_info("\nCan write DVD-RAM:",
3549 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3550 goto done;
3551 if (cdrom_print_info("\nCan read MRW:\t",
3552 CDC_MRW, info, &pos, CTL_CAPABILITY))
3553 goto done;
3554 if (cdrom_print_info("\nCan write MRW:\t",
3555 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3556 goto done;
3557 if (cdrom_print_info("\nCan write RAM:\t",
3558 CDC_RAM, info, &pos, CTL_CAPABILITY))
3559 goto done;
3560 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3561 goto done;
3562doit:
3563 mutex_unlock(&cdrom_mutex);
8d65af78 3564 return proc_dostring(ctl, write, buffer, lenp, ppos);
554988d6 3565done:
e597cd09 3566 pr_info("info buffer too small\n");
554988d6 3567 goto doit;
1da177e4
LT		 3568}
3569
3570/* Unfortunately, per device settings are not implemented through
3571 procfs/sysctl yet. When they are, this will naturally disappear. For now
3572 just update all drives. Later this will become the template on which
3573 new registered drives will be based. */
3574static void cdrom_update_settings(void)
3575{
3576 struct cdrom_device_info *cdi;
3577
032d8d90 3578 mutex_lock(&cdrom_mutex);
7fd097d4 3579 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3580 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3581 cdi->options |= CDO_AUTO_CLOSE;
3582 else if (!autoclose)
3583 cdi->options &= ~CDO_AUTO_CLOSE;
3584 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3585 cdi->options |= CDO_AUTO_EJECT;
3586 else if (!autoeject)
3587 cdi->options &= ~CDO_AUTO_EJECT;
3588 if (lockdoor && CDROM_CAN(CDC_LOCK))
3589 cdi->options |= CDO_LOCK;
3590 else if (!lockdoor)
3591 cdi->options &= ~CDO_LOCK;
3592 if (check_media_type)
3593 cdi->options |= CDO_CHECK_TYPE;
3594 else
3595 cdi->options &= ~CDO_CHECK_TYPE;
3596 }
032d8d90 3597 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3598}
3599
90a3b89e 3600static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
1da177e4
LT		 3601 void __user *buffer, size_t *lenp, loff_t *ppos)
3602{
1da177e4
LT		 3603 int ret;
3604
8d65af78 3605 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 3606
06489b4e 3607 if (write) {
1da177e4
LT		 3608
3609 /* we only care for 1 or 0. */
06489b4e
EB		 3610 autoclose = !!cdrom_sysctl_settings.autoclose;
3611 autoeject = !!cdrom_sysctl_settings.autoeject;
3612 debug = !!cdrom_sysctl_settings.debug;
3613 lockdoor = !!cdrom_sysctl_settings.lock;
3614 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3615
1da177e4
LT		 3616 /* update the option flags according to the changes. we
3617 don't have per device options through sysctl yet,
3618 but we will have and then this will disappear. */
3619 cdrom_update_settings();
3620 }
3621
3622 return ret;
3623}
3624
3625/* Place files in /proc/sys/dev/cdrom */
90a3b89e 3626static struct ctl_table cdrom_table[] = {
1da177e4 3627 {
1da177e4
LT		 3628 .procname = "info",
3629 .data = &cdrom_sysctl_settings.info,
3630 .maxlen = CDROM_STR_SIZE,
3631 .mode = 0444,
6d456111 3632 .proc_handler = cdrom_sysctl_info,
1da177e4
LT		 3633 },
3634 {
1da177e4
LT		 3635 .procname = "autoclose",
3636 .data = &cdrom_sysctl_settings.autoclose,
3637 .maxlen = sizeof(int),
3638 .mode = 0644,
6d456111 3639 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3640 },
3641 {
1da177e4
LT		 3642 .procname = "autoeject",
3643 .data = &cdrom_sysctl_settings.autoeject,
3644 .maxlen = sizeof(int),
3645 .mode = 0644,
6d456111 3646 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3647 },
3648 {
1da177e4
LT		 3649 .procname = "debug",
3650 .data = &cdrom_sysctl_settings.debug,
3651 .maxlen = sizeof(int),
3652 .mode = 0644,
6d456111 3653 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3654 },
3655 {
1da177e4
LT		 3656 .procname = "lock",
3657 .data = &cdrom_sysctl_settings.lock,
3658 .maxlen = sizeof(int),
3659 .mode = 0644,
6d456111 3660 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3661 },
3662 {
1da177e4
LT		 3663 .procname = "check_media",
3664 .data = &cdrom_sysctl_settings.check,
3665 .maxlen = sizeof(int),
3666 .mode = 0644,
6d456111 3667 .proc_handler = cdrom_sysctl_handler
1da177e4 3668 },
894d2491 3669 { }
1da177e4
LT		 3670};
3671
90a3b89e 3672static struct ctl_table cdrom_cdrom_table[] = {
1da177e4 3673 {
1da177e4
LT		 3674 .procname = "cdrom",
3675 .maxlen = 0,
3676 .mode = 0555,
3677 .child = cdrom_table,
3678 },
894d2491 3679 { }
1da177e4
LT		 3680};
3681
3682/* Make sure that /proc/sys/dev is there */
90a3b89e 3683static struct ctl_table cdrom_root_table[] = {
1da177e4 3684 {
1da177e4
LT		 3685 .procname = "dev",
3686 .maxlen = 0,
3687 .mode = 0555,
3688 .child = cdrom_cdrom_table,
3689 },
894d2491 3690 { }
1da177e4
LT		 3691};
3692static struct ctl_table_header *cdrom_sysctl_header;
3693
3694static void cdrom_sysctl_register(void)
3695{
3696 static int initialized;
3697
3698 if (initialized == 1)
3699 return;
3700
0b4d4147 3701 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3702
3703 /* set the defaults */
3704 cdrom_sysctl_settings.autoclose = autoclose;
3705 cdrom_sysctl_settings.autoeject = autoeject;
3706 cdrom_sysctl_settings.debug = debug;
3707 cdrom_sysctl_settings.lock = lockdoor;
3708 cdrom_sysctl_settings.check = check_media_type;
3709
3710 initialized = 1;
3711}
3712
3713static void cdrom_sysctl_unregister(void)
3714{
3715 if (cdrom_sysctl_header)
3716 unregister_sysctl_table(cdrom_sysctl_header);
3717}
3718
17672cf0
AM		 3719#else /* CONFIG_SYSCTL */
3720
3721static void cdrom_sysctl_register(void)
3722{
3723}
3724
3725static void cdrom_sysctl_unregister(void)
3726{
3727}
3728
1da177e4
LT		 3729#endif /* CONFIG_SYSCTL */
3730
3731static int __init cdrom_init(void)
3732{
1da177e4 3733 cdrom_sysctl_register();
17672cf0 3734
1da177e4
LT		 3735 return 0;
3736}
3737
3738static void __exit cdrom_exit(void)
3739{
e597cd09 3740 pr_info("Uniform CD-ROM driver unloaded\n");
1da177e4 3741 cdrom_sysctl_unregister();
1da177e4
LT		 3742}
3743
3744module_init(cdrom_init);
3745module_exit(cdrom_exit);
3746MODULE_LICENSE("GPL");
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