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[MTD] Make init_fortunet function static
[linux-2.6/mini2440.git] / drivers / cdrom / cdrom.c
blobd16b02423d6192f43ad8121776ca419f08cc01c2
1 /* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to activly
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
61 2.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
64 2.12 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
70 2.13 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
85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243 -------------------------------------------------------------------------*/
244
245 #define REVISION "Revision: 3.20"
246 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
247
248 /* I use an error-log mask to give fine grain control over the type of
249 messages dumped to the system logs. The available masks include: */
250 #define CD_NOTHING 0x0
251 #define CD_WARNING 0x1
252 #define CD_REG_UNREG 0x2
253 #define CD_DO_IOCTL 0x4
254 #define CD_OPEN 0x8
255 #define CD_CLOSE 0x10
256 #define CD_COUNT_TRACKS 0x20
257 #define CD_CHANGER 0x40
258 #define CD_DVD 0x80
259
260 /* Define this to remove _all_ the debugging messages */
261 /* #define ERRLOGMASK CD_NOTHING */
262 #define ERRLOGMASK CD_WARNING
263 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
264 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
265
266 #include <linux/module.h>
267 #include <linux/fs.h>
268 #include <linux/buffer_head.h>
269 #include <linux/major.h>
270 #include <linux/types.h>
271 #include <linux/errno.h>
272 #include <linux/kernel.h>
273 #include <linux/mm.h>
274 #include <linux/slab.h>
275 #include <linux/cdrom.h>
276 #include <linux/sysctl.h>
277 #include <linux/proc_fs.h>
278 #include <linux/blkpg.h>
279 #include <linux/init.h>
280 #include <linux/fcntl.h>
281 #include <linux/blkdev.h>
282 #include <linux/times.h>
283
284 #include <asm/uaccess.h>
285
286 /* used to tell the module to turn on full debugging messages */
287 static int debug;
288 /* used to keep tray locked at all times */
289 static int keeplocked;
290 /* default compatibility mode */
291 static int autoclose=1;
292 static int autoeject;
293 static int lockdoor = 1;
294 /* will we ever get to use this... sigh. */
295 static int check_media_type;
296 /* automatically restart mrw format */
297 static int mrw_format_restart = 1;
298 module_param(debug, bool, 0);
299 module_param(autoclose, bool, 0);
300 module_param(autoeject, bool, 0);
301 module_param(lockdoor, bool, 0);
302 module_param(check_media_type, bool, 0);
303 module_param(mrw_format_restart, bool, 0);
304
305 static DEFINE_MUTEX(cdrom_mutex);
306
307 static const char *mrw_format_status[] = {
308 "not mrw",
309 "bgformat inactive",
310 "bgformat active",
311 "mrw complete",
312 };
313
314 static const char *mrw_address_space[] = { "DMA", "GAA" };
315
316 #if (ERRLOGMASK!=CD_NOTHING)
317 #define cdinfo(type, fmt, args...) \
318 if ((ERRLOGMASK & type) || debug==1 ) \
319 printk(KERN_INFO "cdrom: " fmt, ## args)
320 #else
321 #define cdinfo(type, fmt, args...)
322 #endif
323
324 /* These are used to simplify getting data in from and back to user land */
325 #define IOCTL_IN(arg, type, in) \
326 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \
327 return -EFAULT;
328
329 #define IOCTL_OUT(arg, type, out) \
330 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \
331 return -EFAULT;
332
333 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
334 a lot of places. This macro makes the code more clear. */
335 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
336
337 /* used in the audio ioctls */
338 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret
339
340 /*
341 * Another popular OS uses 7 seconds as the hard timeout for default
342 * commands, so it is a good choice for us as well.
343 */
344 #define CDROM_DEF_TIMEOUT (7 * HZ)
345
346 /* Not-exported routines. */
347 static int open_for_data(struct cdrom_device_info * cdi);
348 static int check_for_audio_disc(struct cdrom_device_info * cdi,
349 struct cdrom_device_ops * cdo);
350 static void sanitize_format(union cdrom_addr *addr,
351 u_char * curr, u_char requested);
352 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
353 unsigned long arg);
354
355 int cdrom_get_last_written(struct cdrom_device_info *, long *);
356 static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
357 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
358
359 static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
360
361 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
362
363 static void cdrom_sysctl_register(void);
364
365 static LIST_HEAD(cdrom_list);
366
367 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
368 struct packet_command *cgc)
369 {
370 if (cgc->sense) {
371 cgc->sense->sense_key = 0x05;
372 cgc->sense->asc = 0x20;
373 cgc->sense->ascq = 0x00;
374 }
375
376 cgc->stat = -EIO;
377 return -EIO;
378 }
379
380 /* This macro makes sure we don't have to check on cdrom_device_ops
381 * existence in the run-time routines below. Change_capability is a
382 * hack to have the capability flags defined const, while we can still
383 * change it here without gcc complaining at every line.
384 */
385 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
386
387 int register_cdrom(struct cdrom_device_info *cdi)
388 {
389 static char banner_printed;
390 struct cdrom_device_ops *cdo = cdi->ops;
391 int *change_capability = (int *)&cdo->capability; /* hack */
392
393 cdinfo(CD_OPEN, "entering register_cdrom\n");
394
395 if (cdo->open == NULL || cdo->release == NULL)
396 return -EINVAL;
397 if (!banner_printed) {
398 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
399 banner_printed = 1;
400 cdrom_sysctl_register();
401 }
402
403 ENSURE(drive_status, CDC_DRIVE_STATUS );
404 ENSURE(media_changed, CDC_MEDIA_CHANGED);
405 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
406 ENSURE(lock_door, CDC_LOCK);
407 ENSURE(select_speed, CDC_SELECT_SPEED);
408 ENSURE(get_last_session, CDC_MULTI_SESSION);
409 ENSURE(get_mcn, CDC_MCN);
410 ENSURE(reset, CDC_RESET);
411 ENSURE(generic_packet, CDC_GENERIC_PACKET);
412 cdi->mc_flags = 0;
413 cdo->n_minors = 0;
414 cdi->options = CDO_USE_FFLAGS;
415
416 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
417 cdi->options |= (int) CDO_AUTO_CLOSE;
418 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
419 cdi->options |= (int) CDO_AUTO_EJECT;
420 if (lockdoor==1)
421 cdi->options |= (int) CDO_LOCK;
422 if (check_media_type==1)
423 cdi->options |= (int) CDO_CHECK_TYPE;
424
425 if (CDROM_CAN(CDC_MRW_W))
426 cdi->exit = cdrom_mrw_exit;
427
428 if (cdi->disk)
429 cdi->cdda_method = CDDA_BPC_FULL;
430 else
431 cdi->cdda_method = CDDA_OLD;
432
433 if (!cdo->generic_packet)
434 cdo->generic_packet = cdrom_dummy_generic_packet;
435
436 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
437 mutex_lock(&cdrom_mutex);
438 list_add(&cdi->list, &cdrom_list);
439 mutex_unlock(&cdrom_mutex);
440 return 0;
441 }
442 #undef ENSURE
443
444 void unregister_cdrom(struct cdrom_device_info *cdi)
445 {
446 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
447
448 mutex_lock(&cdrom_mutex);
449 list_del(&cdi->list);
450 mutex_unlock(&cdrom_mutex);
451
452 if (cdi->exit)
453 cdi->exit(cdi);
454
455 cdi->ops->n_minors--;
456 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
457 }
458
459 int cdrom_get_media_event(struct cdrom_device_info *cdi,
460 struct media_event_desc *med)
461 {
462 struct packet_command cgc;
463 unsigned char buffer[8];
464 struct event_header *eh = (struct event_header *) buffer;
465
466 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
467 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
468 cgc.cmd[1] = 1; /* IMMED */
469 cgc.cmd[4] = 1 << 4; /* media event */
470 cgc.cmd[8] = sizeof(buffer);
471 cgc.quiet = 1;
472
473 if (cdi->ops->generic_packet(cdi, &cgc))
474 return 1;
475
476 if (be16_to_cpu(eh->data_len) < sizeof(*med))
477 return 1;
478
479 if (eh->nea || eh->notification_class != 0x4)
480 return 1;
481
482 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
483 return 0;
484 }
485
486 /*
487 * the first prototypes used 0x2c as the page code for the mrw mode page,
488 * subsequently this was changed to 0x03. probe the one used by this drive
489 */
490 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
491 {
492 struct packet_command cgc;
493 char buffer[16];
494
495 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
496
497 cgc.timeout = HZ;
498 cgc.quiet = 1;
499
500 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
501 cdi->mrw_mode_page = MRW_MODE_PC;
502 return 0;
503 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
504 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
505 return 0;
506 }
507
508 return 1;
509 }
510
511 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
512 {
513 struct packet_command cgc;
514 struct mrw_feature_desc *mfd;
515 unsigned char buffer[16];
516 int ret;
517
518 *write = 0;
519
520 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
521
522 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
523 cgc.cmd[3] = CDF_MRW;
524 cgc.cmd[8] = sizeof(buffer);
525 cgc.quiet = 1;
526
527 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
528 return ret;
529
530 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
531 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
532 return 1;
533 *write = mfd->write;
534
535 if ((ret = cdrom_mrw_probe_pc(cdi))) {
536 *write = 0;
537 return ret;
538 }
539
540 return 0;
541 }
542
543 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
544 {
545 struct packet_command cgc;
546 unsigned char buffer[12];
547 int ret;
548
549 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
550
551 /*
552 * FmtData bit set (bit 4), format type is 1
553 */
554 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
555 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
556 cgc.cmd[1] = (1 << 4) | 1;
557
558 cgc.timeout = 5 * 60 * HZ;
559
560 /*
561 * 4 byte format list header, 8 byte format list descriptor
562 */
563 buffer[1] = 1 << 1;
564 buffer[3] = 8;
565
566 /*
567 * nr_blocks field
568 */
569 buffer[4] = 0xff;
570 buffer[5] = 0xff;
571 buffer[6] = 0xff;
572 buffer[7] = 0xff;
573
574 buffer[8] = 0x24 << 2;
575 buffer[11] = cont;
576
577 ret = cdi->ops->generic_packet(cdi, &cgc);
578 if (ret)
579 printk(KERN_INFO "cdrom: bgformat failed\n");
580
581 return ret;
582 }
583
584 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
585 {
586 struct packet_command cgc;
587
588 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
589 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
590
591 /*
592 * Session = 1, Track = 0
593 */
594 cgc.cmd[1] = !!immed;
595 cgc.cmd[2] = 1 << 1;
596
597 cgc.timeout = 5 * 60 * HZ;
598
599 return cdi->ops->generic_packet(cdi, &cgc);
600 }
601
602 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
603 {
604 struct packet_command cgc;
605
606 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
607 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
608
609 cgc.timeout = 5 * 60 * HZ;
610
611 return cdi->ops->generic_packet(cdi, &cgc);
612 }
613
614 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
615 {
616 disc_information di;
617 int ret;
618
619 ret = cdrom_get_disc_info(cdi, &di);
620 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
621 return 1;
622
623 ret = 0;
624 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
625 printk(KERN_INFO "cdrom: issuing MRW back ground "
626 "format suspend\n");
627 ret = cdrom_mrw_bgformat_susp(cdi, 0);
628 }
629
630 if (!ret && cdi->media_written)
631 ret = cdrom_flush_cache(cdi);
632
633 return ret;
634 }
635
636 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
637 {
638 struct packet_command cgc;
639 struct mode_page_header *mph;
640 char buffer[16];
641 int ret, offset, size;
642
643 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
644
645 cgc.buffer = buffer;
646 cgc.buflen = sizeof(buffer);
647
648 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
649 return ret;
650
651 mph = (struct mode_page_header *) buffer;
652 offset = be16_to_cpu(mph->desc_length);
653 size = be16_to_cpu(mph->mode_data_length) + 2;
654
655 buffer[offset + 3] = space;
656 cgc.buflen = size;
657
658 if ((ret = cdrom_mode_select(cdi, &cgc)))
659 return ret;
660
661 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
662 return 0;
663 }
664
665 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
666 struct rwrt_feature_desc *rfd)
667 {
668 struct packet_command cgc;
669 char buffer[24];
670 int ret;
671
672 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
673
674 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
675 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
676 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
677 cgc.quiet = 1;
678
679 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
680 return ret;
681
682 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
683 return 0;
684 }
685
686 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
687 {
688 struct packet_command cgc;
689 char buffer[16];
690 __be16 *feature_code;
691 int ret;
692
693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
696 cgc.cmd[3] = CDF_HWDM;
697 cgc.cmd[8] = sizeof(buffer);
698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 return ret;
702
703 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
704 if (be16_to_cpu(*feature_code) == CDF_HWDM)
705 return 0;
706
707 return 1;
708 }
709
710
711 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
712 {
713 struct rwrt_feature_desc rfd;
714 int ret;
715
716 *write = 0;
717
718 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
719 return ret;
720
721 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
722 *write = 1;
723
724 return 0;
725 }
726
727 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
728 {
729 disc_information di;
730 int ret;
731
732 ret = cdrom_get_disc_info(cdi, &di);
733 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
734 return -1;
735
736 return di.erasable;
737 }
738
739 /*
740 * FIXME: check RO bit
741 */
742 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
743 {
744 int ret = cdrom_media_erasable(cdi);
745
746 /*
747 * allow writable open if media info read worked and media is
748 * erasable, _or_ if it fails since not all drives support it
749 */
750 if (!ret)
751 return 1;
752
753 return 0;
754 }
755
756 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
757 {
758 disc_information di;
759 int ret;
760
761 /*
762 * always reset to DMA lba space on open
763 */
764 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
765 printk(KERN_ERR "cdrom: failed setting lba address space\n");
766 return 1;
767 }
768
769 ret = cdrom_get_disc_info(cdi, &di);
770 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
771 return 1;
772
773 if (!di.erasable)
774 return 1;
775
776 /*
777 * mrw_status
778 * 0 - not MRW formatted
779 * 1 - MRW bgformat started, but not running or complete
780 * 2 - MRW bgformat in progress
781 * 3 - MRW formatting complete
782 */
783 ret = 0;
784 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
785 mrw_format_status[di.mrw_status]);
786 if (!di.mrw_status)
787 ret = 1;
788 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
789 mrw_format_restart)
790 ret = cdrom_mrw_bgformat(cdi, 1);
791
792 return ret;
793 }
794
795 static int mo_open_write(struct cdrom_device_info *cdi)
796 {
797 struct packet_command cgc;
798 char buffer[255];
799 int ret;
800
801 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
802 cgc.quiet = 1;
803
804 /*
805 * obtain write protect information as per
806 * drivers/scsi/sd.c:sd_read_write_protect_flag
807 */
808
809 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
810 if (ret)
811 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
812 if (ret) {
813 cgc.buflen = 255;
814 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
815 }
816
817 /* drive gave us no info, let the user go ahead */
818 if (ret)
819 return 0;
820
821 return buffer[3] & 0x80;
822 }
823
824 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
825 {
826 struct rwrt_feature_desc rfd;
827 int ret;
828
829 if ((ret = cdrom_has_defect_mgt(cdi)))
830 return ret;
831
832 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
833 return ret;
834 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
835 ret = !rfd.curr;
836
837 cdinfo(CD_OPEN, "can open for random write\n");
838 return ret;
839 }
840
841 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
842 {
843 struct packet_command cgc;
844 char buffer[32];
845 int ret, mmc3_profile;
846
847 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
848
849 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
850 cgc.cmd[1] = 0;
851 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
852 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
853 cgc.quiet = 1;
854
855 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
856 mmc3_profile = 0xffff;
857 else
858 mmc3_profile = (buffer[6] << 8) | buffer[7];
859
860 cdi->mmc3_profile = mmc3_profile;
861 }
862
863 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
864 {
865 switch (cdi->mmc3_profile) {
866 case 0x12: /* DVD-RAM */
867 case 0x1A: /* DVD+RW */
868 return 0;
869 default:
870 return 1;
871 }
872 }
873
874 /*
875 * returns 0 for ok to open write, non-0 to disallow
876 */
877 static int cdrom_open_write(struct cdrom_device_info *cdi)
878 {
879 int mrw, mrw_write, ram_write;
880 int ret = 1;
881
882 mrw = 0;
883 if (!cdrom_is_mrw(cdi, &mrw_write))
884 mrw = 1;
885
886 if (CDROM_CAN(CDC_MO_DRIVE))
887 ram_write = 1;
888 else
889 (void) cdrom_is_random_writable(cdi, &ram_write);
890
891 if (mrw)
892 cdi->mask &= ~CDC_MRW;
893 else
894 cdi->mask |= CDC_MRW;
895
896 if (mrw_write)
897 cdi->mask &= ~CDC_MRW_W;
898 else
899 cdi->mask |= CDC_MRW_W;
900
901 if (ram_write)
902 cdi->mask &= ~CDC_RAM;
903 else
904 cdi->mask |= CDC_RAM;
905
906 if (CDROM_CAN(CDC_MRW_W))
907 ret = cdrom_mrw_open_write(cdi);
908 else if (CDROM_CAN(CDC_DVD_RAM))
909 ret = cdrom_dvdram_open_write(cdi);
910 else if (CDROM_CAN(CDC_RAM) &&
911 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
912 ret = cdrom_ram_open_write(cdi);
913 else if (CDROM_CAN(CDC_MO_DRIVE))
914 ret = mo_open_write(cdi);
915 else if (!cdrom_is_dvd_rw(cdi))
916 ret = 0;
917
918 return ret;
919 }
920
921 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
922 {
923 struct packet_command cgc;
924
925 if (cdi->mmc3_profile != 0x1a) {
926 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
927 return;
928 }
929
930 if (!cdi->media_written) {
931 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
932 return;
933 }
934
935 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
936 cdi->name);
937
938 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
939 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
940 cgc.timeout = 30*HZ;
941 cdi->ops->generic_packet(cdi, &cgc);
942
943 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
944 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
945 cgc.timeout = 3000*HZ;
946 cgc.quiet = 1;
947 cdi->ops->generic_packet(cdi, &cgc);
948
949 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
950 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
951 cgc.cmd[2] = 2; /* Close session */
952 cgc.quiet = 1;
953 cgc.timeout = 3000*HZ;
954 cdi->ops->generic_packet(cdi, &cgc);
955
956 cdi->media_written = 0;
957 }
958
959 static int cdrom_close_write(struct cdrom_device_info *cdi)
960 {
961 #if 0
962 return cdrom_flush_cache(cdi);
963 #else
964 return 0;
965 #endif
966 }
967
968 /* We use the open-option O_NONBLOCK to indicate that the
969 * purpose of opening is only for subsequent ioctl() calls; no device
970 * integrity checks are performed.
971 *
972 * We hope that all cd-player programs will adopt this convention. It
973 * is in their own interest: device control becomes a lot easier
974 * this way.
975 */
976 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode)
977 {
978 int ret;
979
980 cdinfo(CD_OPEN, "entering cdrom_open\n");
981
982 /* if this was a O_NONBLOCK open and we should honor the flags,
983 * do a quick open without drive/disc integrity checks. */
984 cdi->use_count++;
985 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
986 ret = cdi->ops->open(cdi, 1);
987 } else {
988 ret = open_for_data(cdi);
989 if (ret)
990 goto err;
991 cdrom_mmc3_profile(cdi);
992 if (mode & FMODE_WRITE) {
993 ret = -EROFS;
994 if (cdrom_open_write(cdi))
995 goto err_release;
996 if (!CDROM_CAN(CDC_RAM))
997 goto err_release;
998 ret = 0;
999 cdi->media_written = 0;
1000 }
1001 }
1002
1003 if (ret)
1004 goto err;
1005
1006 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1007 cdi->name, cdi->use_count);
1008 /* Do this on open. Don't wait for mount, because they might
1009 not be mounting, but opening with O_NONBLOCK */
1010 check_disk_change(bdev);
1011 return 0;
1012 err_release:
1013 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1014 cdi->ops->lock_door(cdi, 0);
1015 cdinfo(CD_OPEN, "door unlocked.\n");
1016 }
1017 cdi->ops->release(cdi);
1018 err:
1019 cdi->use_count--;
1020 return ret;
1021 }
1022
1023 static
1024 int open_for_data(struct cdrom_device_info * cdi)
1025 {
1026 int ret;
1027 struct cdrom_device_ops *cdo = cdi->ops;
1028 tracktype tracks;
1029 cdinfo(CD_OPEN, "entering open_for_data\n");
1030 /* Check if the driver can report drive status. If it can, we
1031 can do clever things. If it can't, well, we at least tried! */
1032 if (cdo->drive_status != NULL) {
1033 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1034 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1035 if (ret == CDS_TRAY_OPEN) {
1036 cdinfo(CD_OPEN, "the tray is open...\n");
1037 /* can/may i close it? */
1038 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1039 cdi->options & CDO_AUTO_CLOSE) {
1040 cdinfo(CD_OPEN, "trying to close the tray.\n");
1041 ret=cdo->tray_move(cdi,0);
1042 if (ret) {
1043 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1044 /* Ignore the error from the low
1045 level driver. We don't care why it
1046 couldn't close the tray. We only care
1047 that there is no disc in the drive,
1048 since that is the _REAL_ problem here.*/
1049 ret=-ENOMEDIUM;
1050 goto clean_up_and_return;
1051 }
1052 } else {
1053 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1054 ret=-ENOMEDIUM;
1055 goto clean_up_and_return;
1056 }
1057 /* Ok, the door should be closed now.. Check again */
1058 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1059 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1060 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1061 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1062 ret=-ENOMEDIUM;
1063 goto clean_up_and_return;
1064 }
1065 cdinfo(CD_OPEN, "the tray is now closed.\n");
1066 }
1067 /* the door should be closed now, check for the disc */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if (ret!=CDS_DISC_OK) {
1070 ret = -ENOMEDIUM;
1071 goto clean_up_and_return;
1072 }
1073 }
1074 cdrom_count_tracks(cdi, &tracks);
1075 if (tracks.error == CDS_NO_DISC) {
1076 cdinfo(CD_OPEN, "bummer. no disc.\n");
1077 ret=-ENOMEDIUM;
1078 goto clean_up_and_return;
1079 }
1080 /* CD-Players which don't use O_NONBLOCK, workman
1081 * for example, need bit CDO_CHECK_TYPE cleared! */
1082 if (tracks.data==0) {
1083 if (cdi->options & CDO_CHECK_TYPE) {
1084 /* give people a warning shot, now that CDO_CHECK_TYPE
1085 is the default case! */
1086 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1087 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1088 (unsigned int)task_pid_nr(current));
1089 ret=-EMEDIUMTYPE;
1090 goto clean_up_and_return;
1091 }
1092 else {
1093 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1094 }
1095 }
1096
1097 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1098
1099 /* all seems well, we can open the device */
1100 ret = cdo->open(cdi, 0); /* open for data */
1101 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1102 /* After all this careful checking, we shouldn't have problems
1103 opening the device, but we don't want the device locked if
1104 this somehow fails... */
1105 if (ret) {
1106 cdinfo(CD_OPEN, "open device failed.\n");
1107 goto clean_up_and_return;
1108 }
1109 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1110 cdo->lock_door(cdi, 1);
1111 cdinfo(CD_OPEN, "door locked.\n");
1112 }
1113 cdinfo(CD_OPEN, "device opened successfully.\n");
1114 return ret;
1115
1116 /* Something failed. Try to unlock the drive, because some drivers
1117 (notably ide-cd) lock the drive after every command. This produced
1118 a nasty bug where after mount failed, the drive would remain locked!
1119 This ensures that the drive gets unlocked after a mount fails. This
1120 is a goto to avoid bloating the driver with redundant code. */
1121 clean_up_and_return:
1122 cdinfo(CD_OPEN, "open failed.\n");
1123 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1124 cdo->lock_door(cdi, 0);
1125 cdinfo(CD_OPEN, "door unlocked.\n");
1126 }
1127 return ret;
1128 }
1129
1130 /* This code is similar to that in open_for_data. The routine is called
1131 whenever an audio play operation is requested.
1132 */
1133 static int check_for_audio_disc(struct cdrom_device_info * cdi,
1134 struct cdrom_device_ops * cdo)
1135 {
1136 int ret;
1137 tracktype tracks;
1138 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1139 if (!(cdi->options & CDO_CHECK_TYPE))
1140 return 0;
1141 if (cdo->drive_status != NULL) {
1142 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1143 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1144 if (ret == CDS_TRAY_OPEN) {
1145 cdinfo(CD_OPEN, "the tray is open...\n");
1146 /* can/may i close it? */
1147 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1148 cdi->options & CDO_AUTO_CLOSE) {
1149 cdinfo(CD_OPEN, "trying to close the tray.\n");
1150 ret=cdo->tray_move(cdi,0);
1151 if (ret) {
1152 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1153 /* Ignore the error from the low
1154 level driver. We don't care why it
1155 couldn't close the tray. We only care
1156 that there is no disc in the drive,
1157 since that is the _REAL_ problem here.*/
1158 return -ENOMEDIUM;
1159 }
1160 } else {
1161 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1162 return -ENOMEDIUM;
1163 }
1164 /* Ok, the door should be closed now.. Check again */
1165 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1166 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1167 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1168 return -ENOMEDIUM;
1169 }
1170 if (ret!=CDS_DISC_OK) {
1171 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1172 return -EIO;
1173 }
1174 cdinfo(CD_OPEN, "the tray is now closed.\n");
1175 }
1176 }
1177 cdrom_count_tracks(cdi, &tracks);
1178 if (tracks.error)
1179 return(tracks.error);
1180
1181 if (tracks.audio==0)
1182 return -EMEDIUMTYPE;
1183
1184 return 0;
1185 }
1186
1187 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1188 {
1189 struct cdrom_device_ops *cdo = cdi->ops;
1190 int opened_for_data;
1191
1192 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1193
1194 if (cdi->use_count > 0)
1195 cdi->use_count--;
1196
1197 if (cdi->use_count == 0) {
1198 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1199 cdrom_dvd_rw_close_write(cdi);
1200
1201 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1202 cdinfo(CD_CLOSE, "Unlocking door!\n");
1203 cdo->lock_door(cdi, 0);
1204 }
1205 }
1206
1207 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1208 !(mode & FMODE_NDELAY);
1209
1210 /*
1211 * flush cache on last write release
1212 */
1213 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1214 cdrom_close_write(cdi);
1215
1216 cdo->release(cdi);
1217 if (cdi->use_count == 0) { /* last process that closes dev*/
1218 if (opened_for_data &&
1219 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1220 cdo->tray_move(cdi, 1);
1221 }
1222 }
1223
1224 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1225 struct cdrom_changer_info *buf)
1226 {
1227 struct packet_command cgc;
1228 struct cdrom_device_ops *cdo = cdi->ops;
1229 int length;
1230
1231 /*
1232 * Sanyo changer isn't spec compliant (doesn't use regular change
1233 * LOAD_UNLOAD command, and it doesn't implement the mech status
1234 * command below
1235 */
1236 if (cdi->sanyo_slot) {
1237 buf->hdr.nslots = 3;
1238 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1239 for (length = 0; length < 3; length++) {
1240 buf->slots[length].disc_present = 1;
1241 buf->slots[length].change = 0;
1242 }
1243 return 0;
1244 }
1245
1246 length = sizeof(struct cdrom_mechstat_header) +
1247 cdi->capacity * sizeof(struct cdrom_slot);
1248
1249 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1250 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1251 cgc.cmd[8] = (length >> 8) & 0xff;
1252 cgc.cmd[9] = length & 0xff;
1253 return cdo->generic_packet(cdi, &cgc);
1254 }
1255
1256 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1257 {
1258 struct cdrom_changer_info *info;
1259 int ret;
1260
1261 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1262 if (cdi->sanyo_slot)
1263 return CDS_NO_INFO;
1264
1265 info = kmalloc(sizeof(*info), GFP_KERNEL);
1266 if (!info)
1267 return -ENOMEM;
1268
1269 if ((ret = cdrom_read_mech_status(cdi, info)))
1270 goto out_free;
1271
1272 if (info->slots[slot].disc_present)
1273 ret = CDS_DISC_OK;
1274 else
1275 ret = CDS_NO_DISC;
1276
1277 out_free:
1278 kfree(info);
1279 return ret;
1280 }
1281
1282 /* Return the number of slots for an ATAPI/SCSI cdrom,
1283 * return 1 if not a changer.
1284 */
1285 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1286 {
1287 int status;
1288 int nslots = 1;
1289 struct cdrom_changer_info *info;
1290
1291 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1292 /* cdrom_read_mech_status requires a valid value for capacity: */
1293 cdi->capacity = 0;
1294
1295 info = kmalloc(sizeof(*info), GFP_KERNEL);
1296 if (!info)
1297 return -ENOMEM;
1298
1299 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1300 nslots = info->hdr.nslots;
1301
1302 kfree(info);
1303 return nslots;
1304 }
1305
1306
1307 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1308 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1309 {
1310 struct packet_command cgc;
1311
1312 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1313 if (cdi->sanyo_slot && slot < 0)
1314 return 0;
1315
1316 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1317 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1318 cgc.cmd[4] = 2 + (slot >= 0);
1319 cgc.cmd[8] = slot;
1320 cgc.timeout = 60 * HZ;
1321
1322 /* The Sanyo 3 CD changer uses byte 7 of the
1323 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1324 using the GPCMD_LOAD_UNLOAD opcode. */
1325 if (cdi->sanyo_slot && -1 < slot) {
1326 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1327 cgc.cmd[7] = slot;
1328 cgc.cmd[4] = cgc.cmd[8] = 0;
1329 cdi->sanyo_slot = slot ? slot : 3;
1330 }
1331
1332 return cdi->ops->generic_packet(cdi, &cgc);
1333 }
1334
1335 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1336 {
1337 struct cdrom_changer_info *info;
1338 int curslot;
1339 int ret;
1340
1341 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1342 if (!CDROM_CAN(CDC_SELECT_DISC))
1343 return -EDRIVE_CANT_DO_THIS;
1344
1345 (void) cdi->ops->media_changed(cdi, slot);
1346
1347 if (slot == CDSL_NONE) {
1348 /* set media changed bits, on both queues */
1349 cdi->mc_flags = 0x3;
1350 return cdrom_load_unload(cdi, -1);
1351 }
1352
1353 info = kmalloc(sizeof(*info), GFP_KERNEL);
1354 if (!info)
1355 return -ENOMEM;
1356
1357 if ((ret = cdrom_read_mech_status(cdi, info))) {
1358 kfree(info);
1359 return ret;
1360 }
1361
1362 curslot = info->hdr.curslot;
1363 kfree(info);
1364
1365 if (cdi->use_count > 1 || keeplocked) {
1366 if (slot == CDSL_CURRENT) {
1367 return curslot;
1368 } else {
1369 return -EBUSY;
1370 }
1371 }
1372
1373 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1374 which is useful if it had been previously unloaded.
1375 Whether it can or not, it returns the current slot.
1376 Similarly, if slot happens to be the current one, we still
1377 try and load it. */
1378 if (slot == CDSL_CURRENT)
1379 slot = curslot;
1380
1381 /* set media changed bits on both queues */
1382 cdi->mc_flags = 0x3;
1383 if ((ret = cdrom_load_unload(cdi, slot)))
1384 return ret;
1385
1386 return slot;
1387 }
1388
1389 /* We want to make media_changed accessible to the user through an
1390 * ioctl. The main problem now is that we must double-buffer the
1391 * low-level implementation, to assure that the VFS and the user both
1392 * see a medium change once.
1393 */
1394
1395 static
1396 int media_changed(struct cdrom_device_info *cdi, int queue)
1397 {
1398 unsigned int mask = (1 << (queue & 1));
1399 int ret = !!(cdi->mc_flags & mask);
1400
1401 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1402 return ret;
1403 /* changed since last call? */
1404 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1405 cdi->mc_flags = 0x3; /* set bit on both queues */
1406 ret |= 1;
1407 cdi->media_written = 0;
1408 }
1409 cdi->mc_flags &= ~mask; /* clear bit */
1410 return ret;
1411 }
1412
1413 int cdrom_media_changed(struct cdrom_device_info *cdi)
1414 {
1415 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1416 * Returning "0" is always safe (media hasn't been changed). Do that
1417 * if the low-level cdrom driver dosn't support media changed. */
1418 if (cdi == NULL || cdi->ops->media_changed == NULL)
1419 return 0;
1420 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1421 return 0;
1422 return media_changed(cdi, 0);
1423 }
1424
1425 /* badly broken, I know. Is due for a fixup anytime. */
1426 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1427 {
1428 struct cdrom_tochdr header;
1429 struct cdrom_tocentry entry;
1430 int ret, i;
1431 tracks->data=0;
1432 tracks->audio=0;
1433 tracks->cdi=0;
1434 tracks->xa=0;
1435 tracks->error=0;
1436 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1437 /* Grab the TOC header so we can see how many tracks there are */
1438 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1439 if (ret == -ENOMEDIUM)
1440 tracks->error = CDS_NO_DISC;
1441 else
1442 tracks->error = CDS_NO_INFO;
1443 return;
1444 }
1445 /* check what type of tracks are on this disc */
1446 entry.cdte_format = CDROM_MSF;
1447 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1448 entry.cdte_track = i;
1449 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1454 if (entry.cdte_format == 0x10)
1455 tracks->cdi++;
1456 else if (entry.cdte_format == 0x20)
1457 tracks->xa++;
1458 else
1459 tracks->data++;
1460 } else
1461 tracks->audio++;
1462 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1463 i, entry.cdte_format, entry.cdte_ctrl);
1464 }
1465 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1466 header.cdth_trk1, tracks->audio, tracks->data,
1467 tracks->cdi, tracks->xa);
1468 }
1469
1470 /* Requests to the low-level drivers will /always/ be done in the
1471 following format convention:
1472
1473 CDROM_LBA: all data-related requests.
1474 CDROM_MSF: all audio-related requests.
1475
1476 However, a low-level implementation is allowed to refuse this
1477 request, and return information in its own favorite format.
1478
1479 It doesn't make sense /at all/ to ask for a play_audio in LBA
1480 format, or ask for multi-session info in MSF format. However, for
1481 backward compatibility these format requests will be satisfied, but
1482 the requests to the low-level drivers will be sanitized in the more
1483 meaningful format indicated above.
1484 */
1485
1486 static
1487 void sanitize_format(union cdrom_addr *addr,
1488 u_char * curr, u_char requested)
1489 {
1490 if (*curr == requested)
1491 return; /* nothing to be done! */
1492 if (requested == CDROM_LBA) {
1493 addr->lba = (int) addr->msf.frame +
1494 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1495 } else { /* CDROM_MSF */
1496 int lba = addr->lba;
1497 addr->msf.frame = lba % 75;
1498 lba /= 75;
1499 lba += 2;
1500 addr->msf.second = lba % 60;
1501 addr->msf.minute = lba / 60;
1502 }
1503 *curr = requested;
1504 }
1505
1506 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1507 int type)
1508 {
1509 memset(cgc, 0, sizeof(struct packet_command));
1510 if (buf)
1511 memset(buf, 0, len);
1512 cgc->buffer = (char *) buf;
1513 cgc->buflen = len;
1514 cgc->data_direction = type;
1515 cgc->timeout = CDROM_DEF_TIMEOUT;
1516 }
1517
1518 /* DVD handling */
1519
1520 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1521 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1522
1523 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1524 {
1525 cgc->cmd[0] = GPCMD_REPORT_KEY;
1526 cgc->cmd[10] = type | (agid << 6);
1527 switch (type) {
1528 case 0: case 8: case 5: {
1529 cgc->buflen = 8;
1530 break;
1531 }
1532 case 1: {
1533 cgc->buflen = 16;
1534 break;
1535 }
1536 case 2: case 4: {
1537 cgc->buflen = 12;
1538 break;
1539 }
1540 }
1541 cgc->cmd[9] = cgc->buflen;
1542 cgc->data_direction = CGC_DATA_READ;
1543 }
1544
1545 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1546 {
1547 cgc->cmd[0] = GPCMD_SEND_KEY;
1548 cgc->cmd[10] = type | (agid << 6);
1549 switch (type) {
1550 case 1: {
1551 cgc->buflen = 16;
1552 break;
1553 }
1554 case 3: {
1555 cgc->buflen = 12;
1556 break;
1557 }
1558 case 6: {
1559 cgc->buflen = 8;
1560 break;
1561 }
1562 }
1563 cgc->cmd[9] = cgc->buflen;
1564 cgc->data_direction = CGC_DATA_WRITE;
1565 }
1566
1567 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1568 {
1569 int ret;
1570 u_char buf[20];
1571 struct packet_command cgc;
1572 struct cdrom_device_ops *cdo = cdi->ops;
1573 rpc_state_t rpc_state;
1574
1575 memset(buf, 0, sizeof(buf));
1576 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1577
1578 switch (ai->type) {
1579 /* LU data send */
1580 case DVD_LU_SEND_AGID:
1581 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1582 cgc.quiet = 1;
1583 setup_report_key(&cgc, ai->lsa.agid, 0);
1584
1585 if ((ret = cdo->generic_packet(cdi, &cgc)))
1586 return ret;
1587
1588 ai->lsa.agid = buf[7] >> 6;
1589 /* Returning data, let host change state */
1590 break;
1591
1592 case DVD_LU_SEND_KEY1:
1593 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1594 setup_report_key(&cgc, ai->lsk.agid, 2);
1595
1596 if ((ret = cdo->generic_packet(cdi, &cgc)))
1597 return ret;
1598
1599 copy_key(ai->lsk.key, &buf[4]);
1600 /* Returning data, let host change state */
1601 break;
1602
1603 case DVD_LU_SEND_CHALLENGE:
1604 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1605 setup_report_key(&cgc, ai->lsc.agid, 1);
1606
1607 if ((ret = cdo->generic_packet(cdi, &cgc)))
1608 return ret;
1609
1610 copy_chal(ai->lsc.chal, &buf[4]);
1611 /* Returning data, let host change state */
1612 break;
1613
1614 /* Post-auth key */
1615 case DVD_LU_SEND_TITLE_KEY:
1616 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1617 cgc.quiet = 1;
1618 setup_report_key(&cgc, ai->lstk.agid, 4);
1619 cgc.cmd[5] = ai->lstk.lba;
1620 cgc.cmd[4] = ai->lstk.lba >> 8;
1621 cgc.cmd[3] = ai->lstk.lba >> 16;
1622 cgc.cmd[2] = ai->lstk.lba >> 24;
1623
1624 if ((ret = cdo->generic_packet(cdi, &cgc)))
1625 return ret;
1626
1627 ai->lstk.cpm = (buf[4] >> 7) & 1;
1628 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1629 ai->lstk.cgms = (buf[4] >> 4) & 3;
1630 copy_key(ai->lstk.title_key, &buf[5]);
1631 /* Returning data, let host change state */
1632 break;
1633
1634 case DVD_LU_SEND_ASF:
1635 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1636 setup_report_key(&cgc, ai->lsasf.agid, 5);
1637
1638 if ((ret = cdo->generic_packet(cdi, &cgc)))
1639 return ret;
1640
1641 ai->lsasf.asf = buf[7] & 1;
1642 break;
1643
1644 /* LU data receive (LU changes state) */
1645 case DVD_HOST_SEND_CHALLENGE:
1646 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1647 setup_send_key(&cgc, ai->hsc.agid, 1);
1648 buf[1] = 0xe;
1649 copy_chal(&buf[4], ai->hsc.chal);
1650
1651 if ((ret = cdo->generic_packet(cdi, &cgc)))
1652 return ret;
1653
1654 ai->type = DVD_LU_SEND_KEY1;
1655 break;
1656
1657 case DVD_HOST_SEND_KEY2:
1658 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1659 setup_send_key(&cgc, ai->hsk.agid, 3);
1660 buf[1] = 0xa;
1661 copy_key(&buf[4], ai->hsk.key);
1662
1663 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1664 ai->type = DVD_AUTH_FAILURE;
1665 return ret;
1666 }
1667 ai->type = DVD_AUTH_ESTABLISHED;
1668 break;
1669
1670 /* Misc */
1671 case DVD_INVALIDATE_AGID:
1672 cgc.quiet = 1;
1673 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1674 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
1676 return ret;
1677 break;
1678
1679 /* Get region settings */
1680 case DVD_LU_SEND_RPC_STATE:
1681 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1682 setup_report_key(&cgc, 0, 8);
1683 memset(&rpc_state, 0, sizeof(rpc_state_t));
1684 cgc.buffer = (char *) &rpc_state;
1685
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
1687 return ret;
1688
1689 ai->lrpcs.type = rpc_state.type_code;
1690 ai->lrpcs.vra = rpc_state.vra;
1691 ai->lrpcs.ucca = rpc_state.ucca;
1692 ai->lrpcs.region_mask = rpc_state.region_mask;
1693 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1694 break;
1695
1696 /* Set region settings */
1697 case DVD_HOST_SEND_RPC_STATE:
1698 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1699 setup_send_key(&cgc, 0, 6);
1700 buf[1] = 6;
1701 buf[4] = ai->hrpcs.pdrc;
1702
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
1704 return ret;
1705 break;
1706
1707 default:
1708 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1709 return -ENOTTY;
1710 }
1711
1712 return 0;
1713 }
1714
1715 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1716 {
1717 unsigned char buf[21], *base;
1718 struct dvd_layer *layer;
1719 struct packet_command cgc;
1720 struct cdrom_device_ops *cdo = cdi->ops;
1721 int ret, layer_num = s->physical.layer_num;
1722
1723 if (layer_num >= DVD_LAYERS)
1724 return -EINVAL;
1725
1726 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1727 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1728 cgc.cmd[6] = layer_num;
1729 cgc.cmd[7] = s->type;
1730 cgc.cmd[9] = cgc.buflen & 0xff;
1731
1732 /*
1733 * refrain from reporting errors on non-existing layers (mainly)
1734 */
1735 cgc.quiet = 1;
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc)))
1738 return ret;
1739
1740 base = &buf[4];
1741 layer = &s->physical.layer[layer_num];
1742
1743 /*
1744 * place the data... really ugly, but at least we won't have to
1745 * worry about endianess in userspace.
1746 */
1747 memset(layer, 0, sizeof(*layer));
1748 layer->book_version = base[0] & 0xf;
1749 layer->book_type = base[0] >> 4;
1750 layer->min_rate = base[1] & 0xf;
1751 layer->disc_size = base[1] >> 4;
1752 layer->layer_type = base[2] & 0xf;
1753 layer->track_path = (base[2] >> 4) & 1;
1754 layer->nlayers = (base[2] >> 5) & 3;
1755 layer->track_density = base[3] & 0xf;
1756 layer->linear_density = base[3] >> 4;
1757 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1758 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1759 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1760 layer->bca = base[16] >> 7;
1761
1762 return 0;
1763 }
1764
1765 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1766 {
1767 int ret;
1768 u_char buf[8];
1769 struct packet_command cgc;
1770 struct cdrom_device_ops *cdo = cdi->ops;
1771
1772 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1773 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1774 cgc.cmd[6] = s->copyright.layer_num;
1775 cgc.cmd[7] = s->type;
1776 cgc.cmd[8] = cgc.buflen >> 8;
1777 cgc.cmd[9] = cgc.buflen & 0xff;
1778
1779 if ((ret = cdo->generic_packet(cdi, &cgc)))
1780 return ret;
1781
1782 s->copyright.cpst = buf[4];
1783 s->copyright.rmi = buf[5];
1784
1785 return 0;
1786 }
1787
1788 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1789 {
1790 int ret, size;
1791 u_char *buf;
1792 struct packet_command cgc;
1793 struct cdrom_device_ops *cdo = cdi->ops;
1794
1795 size = sizeof(s->disckey.value) + 4;
1796
1797 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1798 return -ENOMEM;
1799
1800 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1801 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc.cmd[7] = s->type;
1803 cgc.cmd[8] = size >> 8;
1804 cgc.cmd[9] = size & 0xff;
1805 cgc.cmd[10] = s->disckey.agid << 6;
1806
1807 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1808 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1809
1810 kfree(buf);
1811 return ret;
1812 }
1813
1814 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1815 {
1816 int ret;
1817 u_char buf[4 + 188];
1818 struct packet_command cgc;
1819 struct cdrom_device_ops *cdo = cdi->ops;
1820
1821 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1822 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1823 cgc.cmd[7] = s->type;
1824 cgc.cmd[9] = cgc.buflen & 0xff;
1825
1826 if ((ret = cdo->generic_packet(cdi, &cgc)))
1827 return ret;
1828
1829 s->bca.len = buf[0] << 8 | buf[1];
1830 if (s->bca.len < 12 || s->bca.len > 188) {
1831 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1832 return -EIO;
1833 }
1834 memcpy(s->bca.value, &buf[4], s->bca.len);
1835
1836 return 0;
1837 }
1838
1839 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1840 {
1841 int ret = 0, size;
1842 u_char *buf;
1843 struct packet_command cgc;
1844 struct cdrom_device_ops *cdo = cdi->ops;
1845
1846 size = sizeof(s->manufact.value) + 4;
1847
1848 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1849 return -ENOMEM;
1850
1851 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1852 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1853 cgc.cmd[7] = s->type;
1854 cgc.cmd[8] = size >> 8;
1855 cgc.cmd[9] = size & 0xff;
1856
1857 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1858 kfree(buf);
1859 return ret;
1860 }
1861
1862 s->manufact.len = buf[0] << 8 | buf[1];
1863 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1864 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1865 " (%d)\n", s->manufact.len);
1866 ret = -EIO;
1867 } else {
1868 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1869 }
1870
1871 kfree(buf);
1872 return ret;
1873 }
1874
1875 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1876 {
1877 switch (s->type) {
1878 case DVD_STRUCT_PHYSICAL:
1879 return dvd_read_physical(cdi, s);
1880
1881 case DVD_STRUCT_COPYRIGHT:
1882 return dvd_read_copyright(cdi, s);
1883
1884 case DVD_STRUCT_DISCKEY:
1885 return dvd_read_disckey(cdi, s);
1886
1887 case DVD_STRUCT_BCA:
1888 return dvd_read_bca(cdi, s);
1889
1890 case DVD_STRUCT_MANUFACT:
1891 return dvd_read_manufact(cdi, s);
1892
1893 default:
1894 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1895 s->type);
1896 return -EINVAL;
1897 }
1898 }
1899
1900 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1901 struct packet_command *cgc,
1902 int page_code, int page_control)
1903 {
1904 struct cdrom_device_ops *cdo = cdi->ops;
1905
1906 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1907
1908 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1909 cgc->cmd[2] = page_code | (page_control << 6);
1910 cgc->cmd[7] = cgc->buflen >> 8;
1911 cgc->cmd[8] = cgc->buflen & 0xff;
1912 cgc->data_direction = CGC_DATA_READ;
1913 return cdo->generic_packet(cdi, cgc);
1914 }
1915
1916 int cdrom_mode_select(struct cdrom_device_info *cdi,
1917 struct packet_command *cgc)
1918 {
1919 struct cdrom_device_ops *cdo = cdi->ops;
1920
1921 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1922 memset(cgc->buffer, 0, 2);
1923 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1924 cgc->cmd[1] = 0x10; /* PF */
1925 cgc->cmd[7] = cgc->buflen >> 8;
1926 cgc->cmd[8] = cgc->buflen & 0xff;
1927 cgc->data_direction = CGC_DATA_WRITE;
1928 return cdo->generic_packet(cdi, cgc);
1929 }
1930
1931 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1932 struct cdrom_subchnl *subchnl, int mcn)
1933 {
1934 struct cdrom_device_ops *cdo = cdi->ops;
1935 struct packet_command cgc;
1936 char buffer[32];
1937 int ret;
1938
1939 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1940 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1941 cgc.cmd[1] = 2; /* MSF addressing */
1942 cgc.cmd[2] = 0x40; /* request subQ data */
1943 cgc.cmd[3] = mcn ? 2 : 1;
1944 cgc.cmd[8] = 16;
1945
1946 if ((ret = cdo->generic_packet(cdi, &cgc)))
1947 return ret;
1948
1949 subchnl->cdsc_audiostatus = cgc.buffer[1];
1950 subchnl->cdsc_format = CDROM_MSF;
1951 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1952 subchnl->cdsc_trk = cgc.buffer[6];
1953 subchnl->cdsc_ind = cgc.buffer[7];
1954
1955 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1956 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1957 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1958 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1959 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1960 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1961
1962 return 0;
1963 }
1964
1965 /*
1966 * Specific READ_10 interface
1967 */
1968 static int cdrom_read_cd(struct cdrom_device_info *cdi,
1969 struct packet_command *cgc, int lba,
1970 int blocksize, int nblocks)
1971 {
1972 struct cdrom_device_ops *cdo = cdi->ops;
1973
1974 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1975 cgc->cmd[0] = GPCMD_READ_10;
1976 cgc->cmd[2] = (lba >> 24) & 0xff;
1977 cgc->cmd[3] = (lba >> 16) & 0xff;
1978 cgc->cmd[4] = (lba >> 8) & 0xff;
1979 cgc->cmd[5] = lba & 0xff;
1980 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1981 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1982 cgc->cmd[8] = nblocks & 0xff;
1983 cgc->buflen = blocksize * nblocks;
1984 return cdo->generic_packet(cdi, cgc);
1985 }
1986
1987 /* very generic interface for reading the various types of blocks */
1988 static int cdrom_read_block(struct cdrom_device_info *cdi,
1989 struct packet_command *cgc,
1990 int lba, int nblocks, int format, int blksize)
1991 {
1992 struct cdrom_device_ops *cdo = cdi->ops;
1993
1994 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1995 cgc->cmd[0] = GPCMD_READ_CD;
1996 /* expected sector size - cdda,mode1,etc. */
1997 cgc->cmd[1] = format << 2;
1998 /* starting address */
1999 cgc->cmd[2] = (lba >> 24) & 0xff;
2000 cgc->cmd[3] = (lba >> 16) & 0xff;
2001 cgc->cmd[4] = (lba >> 8) & 0xff;
2002 cgc->cmd[5] = lba & 0xff;
2003 /* number of blocks */
2004 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2005 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2006 cgc->cmd[8] = nblocks & 0xff;
2007 cgc->buflen = blksize * nblocks;
2008
2009 /* set the header info returned */
2010 switch (blksize) {
2011 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2012 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2013 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2014 default : cgc->cmd[9] = 0x10;
2015 }
2016
2017 return cdo->generic_packet(cdi, cgc);
2018 }
2019
2020 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2021 int lba, int nframes)
2022 {
2023 struct packet_command cgc;
2024 int ret = 0;
2025 int nr;
2026
2027 cdi->last_sense = 0;
2028
2029 memset(&cgc, 0, sizeof(cgc));
2030
2031 /*
2032 * start with will ra.nframes size, back down if alloc fails
2033 */
2034 nr = nframes;
2035 do {
2036 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2037 if (cgc.buffer)
2038 break;
2039
2040 nr >>= 1;
2041 } while (nr);
2042
2043 if (!nr)
2044 return -ENOMEM;
2045
2046 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2047 ret = -EFAULT;
2048 goto out;
2049 }
2050
2051 cgc.data_direction = CGC_DATA_READ;
2052 while (nframes > 0) {
2053 if (nr > nframes)
2054 nr = nframes;
2055
2056 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2057 if (ret)
2058 break;
2059 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2060 ret = -EFAULT;
2061 break;
2062 }
2063 ubuf += CD_FRAMESIZE_RAW * nr;
2064 nframes -= nr;
2065 lba += nr;
2066 }
2067 out:
2068 kfree(cgc.buffer);
2069 return ret;
2070 }
2071
2072 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2073 int lba, int nframes)
2074 {
2075 struct request_queue *q = cdi->disk->queue;
2076 struct request *rq;
2077 struct bio *bio;
2078 unsigned int len;
2079 int nr, ret = 0;
2080
2081 if (!q)
2082 return -ENXIO;
2083
2084 rq = blk_get_request(q, READ, GFP_KERNEL);
2085 if (!rq)
2086 return -ENOMEM;
2087
2088 cdi->last_sense = 0;
2089
2090 while (nframes) {
2091 nr = nframes;
2092 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2093 nr = 1;
2094 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2095 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2096
2097 len = nr * CD_FRAMESIZE_RAW;
2098
2099 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2100 if (ret)
2101 break;
2102
2103 rq->cmd[0] = GPCMD_READ_CD;
2104 rq->cmd[1] = 1 << 2;
2105 rq->cmd[2] = (lba >> 24) & 0xff;
2106 rq->cmd[3] = (lba >> 16) & 0xff;
2107 rq->cmd[4] = (lba >> 8) & 0xff;
2108 rq->cmd[5] = lba & 0xff;
2109 rq->cmd[6] = (nr >> 16) & 0xff;
2110 rq->cmd[7] = (nr >> 8) & 0xff;
2111 rq->cmd[8] = nr & 0xff;
2112 rq->cmd[9] = 0xf8;
2113
2114 rq->cmd_len = 12;
2115 rq->cmd_type = REQ_TYPE_BLOCK_PC;
2116 rq->timeout = 60 * HZ;
2117 bio = rq->bio;
2118
2119 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2120 struct request_sense *s = rq->sense;
2121 ret = -EIO;
2122 cdi->last_sense = s->sense_key;
2123 }
2124
2125 if (blk_rq_unmap_user(bio))
2126 ret = -EFAULT;
2127
2128 if (ret)
2129 break;
2130
2131 nframes -= nr;
2132 lba += nr;
2133 ubuf += len;
2134 }
2135
2136 blk_put_request(rq);
2137 return ret;
2138 }
2139
2140 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2141 int lba, int nframes)
2142 {
2143 int ret;
2144
2145 if (cdi->cdda_method == CDDA_OLD)
2146 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2147
2148 retry:
2149 /*
2150 * for anything else than success and io error, we need to retry
2151 */
2152 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2153 if (!ret || ret != -EIO)
2154 return ret;
2155
2156 /*
2157 * I've seen drives get sense 4/8/3 udma crc errors on multi
2158 * frame dma, so drop to single frame dma if we need to
2159 */
2160 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2161 printk("cdrom: dropping to single frame dma\n");
2162 cdi->cdda_method = CDDA_BPC_SINGLE;
2163 goto retry;
2164 }
2165
2166 /*
2167 * so we have an io error of some sort with multi frame dma. if the
2168 * condition wasn't a hardware error
2169 * problems, not for any error
2170 */
2171 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2172 return ret;
2173
2174 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2175 cdi->cdda_method = CDDA_OLD;
2176 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2177 }
2178
2179 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2180 void __user *argp)
2181 {
2182 struct cdrom_multisession ms_info;
2183 u8 requested_format;
2184 int ret;
2185
2186 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2187
2188 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2189 return -ENOSYS;
2190
2191 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2192 return -EFAULT;
2193
2194 requested_format = ms_info.addr_format;
2195 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2196 return -EINVAL;
2197 ms_info.addr_format = CDROM_LBA;
2198
2199 ret = cdi->ops->get_last_session(cdi, &ms_info);
2200 if (ret)
2201 return ret;
2202
2203 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2204
2205 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2206 return -EFAULT;
2207
2208 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2209 return 0;
2210 }
2211
2212 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2213 {
2214 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2215
2216 if (!CDROM_CAN(CDC_OPEN_TRAY))
2217 return -ENOSYS;
2218 if (cdi->use_count != 1 || keeplocked)
2219 return -EBUSY;
2220 if (CDROM_CAN(CDC_LOCK)) {
2221 int ret = cdi->ops->lock_door(cdi, 0);
2222 if (ret)
2223 return ret;
2224 }
2225
2226 return cdi->ops->tray_move(cdi, 1);
2227 }
2228
2229 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2230 {
2231 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2232
2233 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2234 return -ENOSYS;
2235 return cdi->ops->tray_move(cdi, 0);
2236 }
2237
2238 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2239 unsigned long arg)
2240 {
2241 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2242
2243 if (!CDROM_CAN(CDC_OPEN_TRAY))
2244 return -ENOSYS;
2245 if (keeplocked)
2246 return -EBUSY;
2247
2248 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2249 if (arg)
2250 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2251 return 0;
2252 }
2253
2254 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2255 unsigned long arg)
2256 {
2257 struct cdrom_changer_info *info;
2258 int ret;
2259
2260 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2261
2262 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2263 return -ENOSYS;
2264
2265 /* cannot select disc or select current disc */
2266 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2267 return media_changed(cdi, 1);
2268
2269 if ((unsigned int)arg >= cdi->capacity)
2270 return -EINVAL;
2271
2272 info = kmalloc(sizeof(*info), GFP_KERNEL);
2273 if (!info)
2274 return -ENOMEM;
2275
2276 ret = cdrom_read_mech_status(cdi, info);
2277 if (!ret)
2278 ret = info->slots[arg].change;
2279 kfree(info);
2280 return ret;
2281 }
2282
2283 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2284 unsigned long arg)
2285 {
2286 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2287
2288 /*
2289 * Options need to be in sync with capability.
2290 * Too late for that, so we have to check each one separately.
2291 */
2292 switch (arg) {
2293 case CDO_USE_FFLAGS:
2294 case CDO_CHECK_TYPE:
2295 break;
2296 case CDO_LOCK:
2297 if (!CDROM_CAN(CDC_LOCK))
2298 return -ENOSYS;
2299 break;
2300 case 0:
2301 return cdi->options;
2302 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2303 default:
2304 if (!CDROM_CAN(arg))
2305 return -ENOSYS;
2306 }
2307 cdi->options |= (int) arg;
2308 return cdi->options;
2309 }
2310
2311 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2312 unsigned long arg)
2313 {
2314 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2315
2316 cdi->options &= ~(int) arg;
2317 return cdi->options;
2318 }
2319
2320 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2321 unsigned long arg)
2322 {
2323 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2324
2325 if (!CDROM_CAN(CDC_SELECT_SPEED))
2326 return -ENOSYS;
2327 return cdi->ops->select_speed(cdi, arg);
2328 }
2329
2330 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2331 unsigned long arg)
2332 {
2333 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2334
2335 if (!CDROM_CAN(CDC_SELECT_DISC))
2336 return -ENOSYS;
2337
2338 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2339 if ((int)arg >= cdi->capacity)
2340 return -EINVAL;
2341 }
2342
2343 /*
2344 * ->select_disc is a hook to allow a driver-specific way of
2345 * seleting disc. However, since there is no equivalent hook for
2346 * cdrom_slot_status this may not actually be useful...
2347 */
2348 if (cdi->ops->select_disc)
2349 return cdi->ops->select_disc(cdi, arg);
2350
2351 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2352 return cdrom_select_disc(cdi, arg);
2353 }
2354
2355 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2356 struct block_device *bdev)
2357 {
2358 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2359
2360 if (!capable(CAP_SYS_ADMIN))
2361 return -EACCES;
2362 if (!CDROM_CAN(CDC_RESET))
2363 return -ENOSYS;
2364 invalidate_bdev(bdev);
2365 return cdi->ops->reset(cdi);
2366 }
2367
2368 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2369 unsigned long arg)
2370 {
2371 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2372
2373 if (!CDROM_CAN(CDC_LOCK))
2374 return -EDRIVE_CANT_DO_THIS;
2375
2376 keeplocked = arg ? 1 : 0;
2377
2378 /*
2379 * Don't unlock the door on multiple opens by default, but allow
2380 * root to do so.
2381 */
2382 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2383 return -EBUSY;
2384 return cdi->ops->lock_door(cdi, arg);
2385 }
2386
2387 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2388 unsigned long arg)
2389 {
2390 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2391
2392 if (!capable(CAP_SYS_ADMIN))
2393 return -EACCES;
2394 debug = arg ? 1 : 0;
2395 return debug;
2396 }
2397
2398 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2399 {
2400 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2401 return (cdi->ops->capability & ~cdi->mask);
2402 }
2403
2404 /*
2405 * The following function is implemented, although very few audio
2406 * discs give Universal Product Code information, which should just be
2407 * the Medium Catalog Number on the box. Note, that the way the code
2408 * is written on the CD is /not/ uniform across all discs!
2409 */
2410 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2411 void __user *argp)
2412 {
2413 struct cdrom_mcn mcn;
2414 int ret;
2415
2416 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2417
2418 if (!(cdi->ops->capability & CDC_MCN))
2419 return -ENOSYS;
2420 ret = cdi->ops->get_mcn(cdi, &mcn);
2421 if (ret)
2422 return ret;
2423
2424 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2425 return -EFAULT;
2426 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2427 return 0;
2428 }
2429
2430 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2431 unsigned long arg)
2432 {
2433 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2434
2435 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2436 return -ENOSYS;
2437 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2438 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2439 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2440 if (((int)arg >= cdi->capacity))
2441 return -EINVAL;
2442 return cdrom_slot_status(cdi, arg);
2443 }
2444
2445 /*
2446 * Ok, this is where problems start. The current interface for the
2447 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2448 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2449 * is often the case, it is also very common for CDs to have some tracks
2450 * with data, and some tracks with audio. Just because I feel like it,
2451 * I declare the following to be the best way to cope. If the CD has ANY
2452 * data tracks on it, it will be returned as a data CD. If it has any XA
2453 * tracks, I will return it as that. Now I could simplify this interface
2454 * by combining these returns with the above, but this more clearly
2455 * demonstrates the problem with the current interface. Too bad this
2456 * wasn't designed to use bitmasks... -Erik
2457 *
2458 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2459 * User level programmers might feel the ioctl is not very useful.
2460 * ---david
2461 */
2462 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2463 {
2464 tracktype tracks;
2465
2466 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2467
2468 cdrom_count_tracks(cdi, &tracks);
2469 if (tracks.error)
2470 return tracks.error;
2471
2472 /* Policy mode on */
2473 if (tracks.audio > 0) {
2474 if (!tracks.data && !tracks.cdi && !tracks.xa)
2475 return CDS_AUDIO;
2476 else
2477 return CDS_MIXED;
2478 }
2479
2480 if (tracks.cdi > 0)
2481 return CDS_XA_2_2;
2482 if (tracks.xa > 0)
2483 return CDS_XA_2_1;
2484 if (tracks.data > 0)
2485 return CDS_DATA_1;
2486 /* Policy mode off */
2487
2488 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2489 return CDS_NO_INFO;
2490 }
2491
2492 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2493 {
2494 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2495 return cdi->capacity;
2496 }
2497
2498 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2499 void __user *argp)
2500 {
2501 struct cdrom_subchnl q;
2502 u8 requested, back;
2503 int ret;
2504
2505 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2506
2507 if (copy_from_user(&q, argp, sizeof(q)))
2508 return -EFAULT;
2509
2510 requested = q.cdsc_format;
2511 if (requested != CDROM_MSF && requested != CDROM_LBA)
2512 return -EINVAL;
2513 q.cdsc_format = CDROM_MSF;
2514
2515 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2516 if (ret)
2517 return ret;
2518
2519 back = q.cdsc_format; /* local copy */
2520 sanitize_format(&q.cdsc_absaddr, &back, requested);
2521 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2522
2523 if (copy_to_user(argp, &q, sizeof(q)))
2524 return -EFAULT;
2525 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2526 return 0;
2527 }
2528
2529 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2530 void __user *argp)
2531 {
2532 struct cdrom_tochdr header;
2533 int ret;
2534
2535 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2536
2537 if (copy_from_user(&header, argp, sizeof(header)))
2538 return -EFAULT;
2539
2540 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2541 if (ret)
2542 return ret;
2543
2544 if (copy_to_user(argp, &header, sizeof(header)))
2545 return -EFAULT;
2546 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2547 return 0;
2548 }
2549
2550 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2551 void __user *argp)
2552 {
2553 struct cdrom_tocentry entry;
2554 u8 requested_format;
2555 int ret;
2556
2557 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2558
2559 if (copy_from_user(&entry, argp, sizeof(entry)))
2560 return -EFAULT;
2561
2562 requested_format = entry.cdte_format;
2563 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2564 return -EINVAL;
2565 /* make interface to low-level uniform */
2566 entry.cdte_format = CDROM_MSF;
2567 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2568 if (ret)
2569 return ret;
2570 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2571
2572 if (copy_to_user(argp, &entry, sizeof(entry)))
2573 return -EFAULT;
2574 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2575 return 0;
2576 }
2577
2578 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2579 void __user *argp)
2580 {
2581 struct cdrom_msf msf;
2582
2583 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2584
2585 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2586 return -ENOSYS;
2587 if (copy_from_user(&msf, argp, sizeof(msf)))
2588 return -EFAULT;
2589 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2590 }
2591
2592 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2593 void __user *argp)
2594 {
2595 struct cdrom_ti ti;
2596 int ret;
2597
2598 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2599
2600 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2601 return -ENOSYS;
2602 if (copy_from_user(&ti, argp, sizeof(ti)))
2603 return -EFAULT;
2604
2605 ret = check_for_audio_disc(cdi, cdi->ops);
2606 if (ret)
2607 return ret;
2608 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2609 }
2610 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2611 void __user *argp)
2612 {
2613 struct cdrom_volctrl volume;
2614
2615 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2616
2617 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2618 return -ENOSYS;
2619 if (copy_from_user(&volume, argp, sizeof(volume)))
2620 return -EFAULT;
2621 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2622 }
2623
2624 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2625 void __user *argp)
2626 {
2627 struct cdrom_volctrl volume;
2628 int ret;
2629
2630 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2631
2632 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2633 return -ENOSYS;
2634
2635 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2636 if (ret)
2637 return ret;
2638
2639 if (copy_to_user(argp, &volume, sizeof(volume)))
2640 return -EFAULT;
2641 return 0;
2642 }
2643
2644 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2645 unsigned int cmd)
2646 {
2647 int ret;
2648
2649 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2650
2651 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2652 return -ENOSYS;
2653 ret = check_for_audio_disc(cdi, cdi->ops);
2654 if (ret)
2655 return ret;
2656 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2657 }
2658
2659 /*
2660 * Just about every imaginable ioctl is supported in the Uniform layer
2661 * these days.
2662 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2663 */
2664 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2665 fmode_t mode, unsigned int cmd, unsigned long arg)
2666 {
2667 void __user *argp = (void __user *)arg;
2668 int ret;
2669 struct gendisk *disk = bdev->bd_disk;
2670
2671 /*
2672 * Try the generic SCSI command ioctl's first.
2673 */
2674 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
2675 if (ret != -ENOTTY)
2676 return ret;
2677
2678 switch (cmd) {
2679 case CDROMMULTISESSION:
2680 return cdrom_ioctl_multisession(cdi, argp);
2681 case CDROMEJECT:
2682 return cdrom_ioctl_eject(cdi);
2683 case CDROMCLOSETRAY:
2684 return cdrom_ioctl_closetray(cdi);
2685 case CDROMEJECT_SW:
2686 return cdrom_ioctl_eject_sw(cdi, arg);
2687 case CDROM_MEDIA_CHANGED:
2688 return cdrom_ioctl_media_changed(cdi, arg);
2689 case CDROM_SET_OPTIONS:
2690 return cdrom_ioctl_set_options(cdi, arg);
2691 case CDROM_CLEAR_OPTIONS:
2692 return cdrom_ioctl_clear_options(cdi, arg);
2693 case CDROM_SELECT_SPEED:
2694 return cdrom_ioctl_select_speed(cdi, arg);
2695 case CDROM_SELECT_DISC:
2696 return cdrom_ioctl_select_disc(cdi, arg);
2697 case CDROMRESET:
2698 return cdrom_ioctl_reset(cdi, bdev);
2699 case CDROM_LOCKDOOR:
2700 return cdrom_ioctl_lock_door(cdi, arg);
2701 case CDROM_DEBUG:
2702 return cdrom_ioctl_debug(cdi, arg);
2703 case CDROM_GET_CAPABILITY:
2704 return cdrom_ioctl_get_capability(cdi);
2705 case CDROM_GET_MCN:
2706 return cdrom_ioctl_get_mcn(cdi, argp);
2707 case CDROM_DRIVE_STATUS:
2708 return cdrom_ioctl_drive_status(cdi, arg);
2709 case CDROM_DISC_STATUS:
2710 return cdrom_ioctl_disc_status(cdi);
2711 case CDROM_CHANGER_NSLOTS:
2712 return cdrom_ioctl_changer_nslots(cdi);
2713 }
2714
2715 /*
2716 * Use the ioctls that are implemented through the generic_packet()
2717 * interface. this may look at bit funny, but if -ENOTTY is
2718 * returned that particular ioctl is not implemented and we
2719 * let it go through the device specific ones.
2720 */
2721 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2722 ret = mmc_ioctl(cdi, cmd, arg);
2723 if (ret != -ENOTTY)
2724 return ret;
2725 }
2726
2727 /*
2728 * Note: most of the cdinfo() calls are commented out here,
2729 * because they fill up the sys log when CD players poll
2730 * the drive.
2731 */
2732 switch (cmd) {
2733 case CDROMSUBCHNL:
2734 return cdrom_ioctl_get_subchnl(cdi, argp);
2735 case CDROMREADTOCHDR:
2736 return cdrom_ioctl_read_tochdr(cdi, argp);
2737 case CDROMREADTOCENTRY:
2738 return cdrom_ioctl_read_tocentry(cdi, argp);
2739 case CDROMPLAYMSF:
2740 return cdrom_ioctl_play_msf(cdi, argp);
2741 case CDROMPLAYTRKIND:
2742 return cdrom_ioctl_play_trkind(cdi, argp);
2743 case CDROMVOLCTRL:
2744 return cdrom_ioctl_volctrl(cdi, argp);
2745 case CDROMVOLREAD:
2746 return cdrom_ioctl_volread(cdi, argp);
2747 case CDROMSTART:
2748 case CDROMSTOP:
2749 case CDROMPAUSE:
2750 case CDROMRESUME:
2751 return cdrom_ioctl_audioctl(cdi, cmd);
2752 }
2753
2754 return -ENOSYS;
2755 }
2756
2757 /*
2758 * Required when we need to use READ_10 to issue other than 2048 block
2759 * reads
2760 */
2761 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2762 {
2763 struct cdrom_device_ops *cdo = cdi->ops;
2764 struct packet_command cgc;
2765 struct modesel_head mh;
2766
2767 memset(&mh, 0, sizeof(mh));
2768 mh.block_desc_length = 0x08;
2769 mh.block_length_med = (size >> 8) & 0xff;
2770 mh.block_length_lo = size & 0xff;
2771
2772 memset(&cgc, 0, sizeof(cgc));
2773 cgc.cmd[0] = 0x15;
2774 cgc.cmd[1] = 1 << 4;
2775 cgc.cmd[4] = 12;
2776 cgc.buflen = sizeof(mh);
2777 cgc.buffer = (char *) &mh;
2778 cgc.data_direction = CGC_DATA_WRITE;
2779 mh.block_desc_length = 0x08;
2780 mh.block_length_med = (size >> 8) & 0xff;
2781 mh.block_length_lo = size & 0xff;
2782
2783 return cdo->generic_packet(cdi, &cgc);
2784 }
2785
2786 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2787 unsigned long arg)
2788 {
2789 struct cdrom_device_ops *cdo = cdi->ops;
2790 struct packet_command cgc;
2791 struct request_sense sense;
2792 unsigned char buffer[32];
2793 int ret = 0;
2794
2795 memset(&cgc, 0, sizeof(cgc));
2796
2797 /* build a unified command and queue it through
2798 cdo->generic_packet() */
2799 switch (cmd) {
2800 case CDROMREADRAW:
2801 case CDROMREADMODE1:
2802 case CDROMREADMODE2: {
2803 struct cdrom_msf msf;
2804 int blocksize = 0, format = 0, lba;
2805
2806 switch (cmd) {
2807 case CDROMREADRAW:
2808 blocksize = CD_FRAMESIZE_RAW;
2809 break;
2810 case CDROMREADMODE1:
2811 blocksize = CD_FRAMESIZE;
2812 format = 2;
2813 break;
2814 case CDROMREADMODE2:
2815 blocksize = CD_FRAMESIZE_RAW0;
2816 break;
2817 }
2818 IOCTL_IN(arg, struct cdrom_msf, msf);
2819 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2820 /* FIXME: we need upper bound checking, too!! */
2821 if (lba < 0)
2822 return -EINVAL;
2823 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
2824 if (cgc.buffer == NULL)
2825 return -ENOMEM;
2826 memset(&sense, 0, sizeof(sense));
2827 cgc.sense = &sense;
2828 cgc.data_direction = CGC_DATA_READ;
2829 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2830 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2831 /*
2832 * SCSI-II devices are not required to support
2833 * READ_CD, so let's try switching block size
2834 */
2835 /* FIXME: switch back again... */
2836 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2837 kfree(cgc.buffer);
2838 return ret;
2839 }
2840 cgc.sense = NULL;
2841 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2842 ret |= cdrom_switch_blocksize(cdi, blocksize);
2843 }
2844 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2845 ret = -EFAULT;
2846 kfree(cgc.buffer);
2847 return ret;
2848 }
2849 case CDROMREADAUDIO: {
2850 struct cdrom_read_audio ra;
2851 int lba;
2852
2853 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2854
2855 if (ra.addr_format == CDROM_MSF)
2856 lba = msf_to_lba(ra.addr.msf.minute,
2857 ra.addr.msf.second,
2858 ra.addr.msf.frame);
2859 else if (ra.addr_format == CDROM_LBA)
2860 lba = ra.addr.lba;
2861 else
2862 return -EINVAL;
2863
2864 /* FIXME: we need upper bound checking, too!! */
2865 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2866 return -EINVAL;
2867
2868 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2869 }
2870 case CDROMSUBCHNL: {
2871 struct cdrom_subchnl q;
2872 u_char requested, back;
2873 IOCTL_IN(arg, struct cdrom_subchnl, q);
2874 requested = q.cdsc_format;
2875 if (!((requested == CDROM_MSF) ||
2876 (requested == CDROM_LBA)))
2877 return -EINVAL;
2878 q.cdsc_format = CDROM_MSF;
2879 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2880 return ret;
2881 back = q.cdsc_format; /* local copy */
2882 sanitize_format(&q.cdsc_absaddr, &back, requested);
2883 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2884 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2885 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2886 return 0;
2887 }
2888 case CDROMPLAYMSF: {
2889 struct cdrom_msf msf;
2890 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2891 IOCTL_IN(arg, struct cdrom_msf, msf);
2892 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2893 cgc.cmd[3] = msf.cdmsf_min0;
2894 cgc.cmd[4] = msf.cdmsf_sec0;
2895 cgc.cmd[5] = msf.cdmsf_frame0;
2896 cgc.cmd[6] = msf.cdmsf_min1;
2897 cgc.cmd[7] = msf.cdmsf_sec1;
2898 cgc.cmd[8] = msf.cdmsf_frame1;
2899 cgc.data_direction = CGC_DATA_NONE;
2900 return cdo->generic_packet(cdi, &cgc);
2901 }
2902 case CDROMPLAYBLK: {
2903 struct cdrom_blk blk;
2904 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2905 IOCTL_IN(arg, struct cdrom_blk, blk);
2906 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2907 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2908 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2909 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2910 cgc.cmd[5] = blk.from & 0xff;
2911 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2912 cgc.cmd[8] = blk.len & 0xff;
2913 cgc.data_direction = CGC_DATA_NONE;
2914 return cdo->generic_packet(cdi, &cgc);
2915 }
2916 case CDROMVOLCTRL:
2917 case CDROMVOLREAD: {
2918 struct cdrom_volctrl volctrl;
2919 char mask[sizeof(buffer)];
2920 unsigned short offset;
2921
2922 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2923
2924 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2925
2926 cgc.buffer = buffer;
2927 cgc.buflen = 24;
2928 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2929 return ret;
2930
2931 /* originally the code depended on buffer[1] to determine
2932 how much data is available for transfer. buffer[1] is
2933 unfortunately ambigious and the only reliable way seem
2934 to be to simply skip over the block descriptor... */
2935 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
2936
2937 if (offset + 16 > sizeof(buffer))
2938 return -E2BIG;
2939
2940 if (offset + 16 > cgc.buflen) {
2941 cgc.buflen = offset+16;
2942 ret = cdrom_mode_sense(cdi, &cgc,
2943 GPMODE_AUDIO_CTL_PAGE, 0);
2944 if (ret)
2945 return ret;
2946 }
2947
2948 /* sanity check */
2949 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2950 buffer[offset+1] < 14)
2951 return -EINVAL;
2952
2953 /* now we have the current volume settings. if it was only
2954 a CDROMVOLREAD, return these values */
2955 if (cmd == CDROMVOLREAD) {
2956 volctrl.channel0 = buffer[offset+9];
2957 volctrl.channel1 = buffer[offset+11];
2958 volctrl.channel2 = buffer[offset+13];
2959 volctrl.channel3 = buffer[offset+15];
2960 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2961 return 0;
2962 }
2963
2964 /* get the volume mask */
2965 cgc.buffer = mask;
2966 if ((ret = cdrom_mode_sense(cdi, &cgc,
2967 GPMODE_AUDIO_CTL_PAGE, 1)))
2968 return ret;
2969
2970 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2971 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2972 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2973 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2974
2975 /* set volume */
2976 cgc.buffer = buffer + offset - 8;
2977 memset(cgc.buffer, 0, 8);
2978 return cdrom_mode_select(cdi, &cgc);
2979 }
2980
2981 case CDROMSTART:
2982 case CDROMSTOP: {
2983 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2984 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2985 cgc.cmd[1] = 1;
2986 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
2987 cgc.data_direction = CGC_DATA_NONE;
2988 return cdo->generic_packet(cdi, &cgc);
2989 }
2990
2991 case CDROMPAUSE:
2992 case CDROMRESUME: {
2993 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
2994 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
2995 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
2996 cgc.data_direction = CGC_DATA_NONE;
2997 return cdo->generic_packet(cdi, &cgc);
2998 }
2999
3000 case DVD_READ_STRUCT: {
3001 dvd_struct *s;
3002 int size = sizeof(dvd_struct);
3003 if (!CDROM_CAN(CDC_DVD))
3004 return -ENOSYS;
3005 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
3006 return -ENOMEM;
3007 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3008 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3009 kfree(s);
3010 return -EFAULT;
3011 }
3012 if ((ret = dvd_read_struct(cdi, s))) {
3013 kfree(s);
3014 return ret;
3015 }
3016 if (copy_to_user((dvd_struct __user *)arg, s, size))
3017 ret = -EFAULT;
3018 kfree(s);
3019 return ret;
3020 }
3021
3022 case DVD_AUTH: {
3023 dvd_authinfo ai;
3024 if (!CDROM_CAN(CDC_DVD))
3025 return -ENOSYS;
3026 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3027 IOCTL_IN(arg, dvd_authinfo, ai);
3028 if ((ret = dvd_do_auth (cdi, &ai)))
3029 return ret;
3030 IOCTL_OUT(arg, dvd_authinfo, ai);
3031 return 0;
3032 }
3033
3034 case CDROM_NEXT_WRITABLE: {
3035 long next = 0;
3036 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3037 if ((ret = cdrom_get_next_writable(cdi, &next)))
3038 return ret;
3039 IOCTL_OUT(arg, long, next);
3040 return 0;
3041 }
3042 case CDROM_LAST_WRITTEN: {
3043 long last = 0;
3044 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3045 if ((ret = cdrom_get_last_written(cdi, &last)))
3046 return ret;
3047 IOCTL_OUT(arg, long, last);
3048 return 0;
3049 }
3050 } /* switch */
3051
3052 return -ENOTTY;
3053 }
3054
3055 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3056 track_information *ti)
3057 {
3058 struct cdrom_device_ops *cdo = cdi->ops;
3059 struct packet_command cgc;
3060 int ret, buflen;
3061
3062 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3063 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3064 cgc.cmd[1] = type & 3;
3065 cgc.cmd[4] = (track & 0xff00) >> 8;
3066 cgc.cmd[5] = track & 0xff;
3067 cgc.cmd[8] = 8;
3068 cgc.quiet = 1;
3069
3070 if ((ret = cdo->generic_packet(cdi, &cgc)))
3071 return ret;
3072
3073 buflen = be16_to_cpu(ti->track_information_length) +
3074 sizeof(ti->track_information_length);
3075
3076 if (buflen > sizeof(track_information))
3077 buflen = sizeof(track_information);
3078
3079 cgc.cmd[8] = cgc.buflen = buflen;
3080 if ((ret = cdo->generic_packet(cdi, &cgc)))
3081 return ret;
3082
3083 /* return actual fill size */
3084 return buflen;
3085 }
3086
3087 /* requires CD R/RW */
3088 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3089 {
3090 struct cdrom_device_ops *cdo = cdi->ops;
3091 struct packet_command cgc;
3092 int ret, buflen;
3093
3094 /* set up command and get the disc info */
3095 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3096 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3097 cgc.cmd[8] = cgc.buflen = 2;
3098 cgc.quiet = 1;
3099
3100 if ((ret = cdo->generic_packet(cdi, &cgc)))
3101 return ret;
3102
3103 /* not all drives have the same disc_info length, so requeue
3104 * packet with the length the drive tells us it can supply
3105 */
3106 buflen = be16_to_cpu(di->disc_information_length) +
3107 sizeof(di->disc_information_length);
3108
3109 if (buflen > sizeof(disc_information))
3110 buflen = sizeof(disc_information);
3111
3112 cgc.cmd[8] = cgc.buflen = buflen;
3113 if ((ret = cdo->generic_packet(cdi, &cgc)))
3114 return ret;
3115
3116 /* return actual fill size */
3117 return buflen;
3118 }
3119
3120 /* return the last written block on the CD-R media. this is for the udf
3121 file system. */
3122 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3123 {
3124 struct cdrom_tocentry toc;
3125 disc_information di;
3126 track_information ti;
3127 __u32 last_track;
3128 int ret = -1, ti_size;
3129
3130 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3131 goto use_toc;
3132
3133 ret = cdrom_get_disc_info(cdi, &di);
3134 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3135 + sizeof(di.last_track_lsb)))
3136 goto use_toc;
3137
3138 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3139 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3140 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3141 if (ti_size < (int)offsetof(typeof(ti), track_start))
3142 goto use_toc;
3143
3144 /* if this track is blank, try the previous. */
3145 if (ti.blank) {
3146 if (last_track==1)
3147 goto use_toc;
3148 last_track--;
3149 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3150 }
3151
3152 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3153 + sizeof(ti.track_size)))
3154 goto use_toc;
3155
3156 /* if last recorded field is valid, return it. */
3157 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3158 + sizeof(ti.last_rec_address))) {
3159 *last_written = be32_to_cpu(ti.last_rec_address);
3160 } else {
3161 /* make it up instead */
3162 *last_written = be32_to_cpu(ti.track_start) +
3163 be32_to_cpu(ti.track_size);
3164 if (ti.free_blocks)
3165 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3166 }
3167 return 0;
3168
3169 /* this is where we end up if the drive either can't do a
3170 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3171 it doesn't give enough information or fails. then we return
3172 the toc contents. */
3173 use_toc:
3174 toc.cdte_format = CDROM_MSF;
3175 toc.cdte_track = CDROM_LEADOUT;
3176 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3177 return ret;
3178 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3179 *last_written = toc.cdte_addr.lba;
3180 return 0;
3181 }
3182
3183 /* return the next writable block. also for udf file system. */
3184 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3185 {
3186 disc_information di;
3187 track_information ti;
3188 __u16 last_track;
3189 int ret, ti_size;
3190
3191 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3192 goto use_last_written;
3193
3194 ret = cdrom_get_disc_info(cdi, &di);
3195 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3196 + sizeof(di.last_track_lsb))
3197 goto use_last_written;
3198
3199 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3200 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3201 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3202 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3203 goto use_last_written;
3204
3205 /* if this track is blank, try the previous. */
3206 if (ti.blank) {
3207 if (last_track == 1)
3208 goto use_last_written;
3209 last_track--;
3210 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3211 if (ti_size < 0)
3212 goto use_last_written;
3213 }
3214
3215 /* if next recordable address field is valid, use it. */
3216 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3217 + sizeof(ti.next_writable)) {
3218 *next_writable = be32_to_cpu(ti.next_writable);
3219 return 0;
3220 }
3221
3222 use_last_written:
3223 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3224 *next_writable = 0;
3225 return ret;
3226 } else {
3227 *next_writable += 7;
3228 return 0;
3229 }
3230 }
3231
3232 EXPORT_SYMBOL(cdrom_get_last_written);
3233 EXPORT_SYMBOL(register_cdrom);
3234 EXPORT_SYMBOL(unregister_cdrom);
3235 EXPORT_SYMBOL(cdrom_open);
3236 EXPORT_SYMBOL(cdrom_release);
3237 EXPORT_SYMBOL(cdrom_ioctl);
3238 EXPORT_SYMBOL(cdrom_media_changed);
3239 EXPORT_SYMBOL(cdrom_number_of_slots);
3240 EXPORT_SYMBOL(cdrom_mode_select);
3241 EXPORT_SYMBOL(cdrom_mode_sense);
3242 EXPORT_SYMBOL(init_cdrom_command);
3243 EXPORT_SYMBOL(cdrom_get_media_event);
3244
3245 #ifdef CONFIG_SYSCTL
3246
3247 #define CDROM_STR_SIZE 1000
3248
3249 static struct cdrom_sysctl_settings {
3250 char info[CDROM_STR_SIZE]; /* general info */
3251 int autoclose; /* close tray upon mount, etc */
3252 int autoeject; /* eject on umount */
3253 int debug; /* turn on debugging messages */
3254 int lock; /* lock the door on device open */
3255 int check; /* check media type */
3256 } cdrom_sysctl_settings;
3257
3258 enum cdrom_print_option {
3259 CTL_NAME,
3260 CTL_SPEED,
3261 CTL_SLOTS,
3262 CTL_CAPABILITY
3263 };
3264
3265 static int cdrom_print_info(const char *header, int val, char *info,
3266 int *pos, enum cdrom_print_option option)
3267 {
3268 const int max_size = sizeof(cdrom_sysctl_settings.info);
3269 struct cdrom_device_info *cdi;
3270 int ret;
3271
3272 ret = scnprintf(info + *pos, max_size - *pos, header);
3273 if (!ret)
3274 return 1;
3275
3276 *pos += ret;
3277
3278 list_for_each_entry(cdi, &cdrom_list, list) {
3279 switch (option) {
3280 case CTL_NAME:
3281 ret = scnprintf(info + *pos, max_size - *pos,
3282 "\t%s", cdi->name);
3283 break;
3284 case CTL_SPEED:
3285 ret = scnprintf(info + *pos, max_size - *pos,
3286 "\t%d", cdi->speed);
3287 break;
3288 case CTL_SLOTS:
3289 ret = scnprintf(info + *pos, max_size - *pos,
3290 "\t%d", cdi->capacity);
3291 break;
3292 case CTL_CAPABILITY:
3293 ret = scnprintf(info + *pos, max_size - *pos,
3294 "\t%d", CDROM_CAN(val) != 0);
3295 break;
3296 default:
3297 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3298 return 1;
3299 }
3300 if (!ret)
3301 return 1;
3302 *pos += ret;
3303 }
3304
3305 return 0;
3306 }
3307
3308 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3309 void __user *buffer, size_t *lenp, loff_t *ppos)
3310 {
3311 int pos;
3312 char *info = cdrom_sysctl_settings.info;
3313 const int max_size = sizeof(cdrom_sysctl_settings.info);
3314
3315 if (!*lenp || (*ppos && !write)) {
3316 *lenp = 0;
3317 return 0;
3318 }
3319
3320 mutex_lock(&cdrom_mutex);
3321
3322 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3323
3324 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3325 goto done;
3326 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3327 goto done;
3328 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3329 goto done;
3330 if (cdrom_print_info("\nCan close tray:\t",
3331 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3332 goto done;
3333 if (cdrom_print_info("\nCan open tray:\t",
3334 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3335 goto done;
3336 if (cdrom_print_info("\nCan lock tray:\t",
3337 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3338 goto done;
3339 if (cdrom_print_info("\nCan change speed:",
3340 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3341 goto done;
3342 if (cdrom_print_info("\nCan select disk:",
3343 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3344 goto done;
3345 if (cdrom_print_info("\nCan read multisession:",
3346 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3347 goto done;
3348 if (cdrom_print_info("\nCan read MCN:\t",
3349 CDC_MCN, info, &pos, CTL_CAPABILITY))
3350 goto done;
3351 if (cdrom_print_info("\nReports media changed:",
3352 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3353 goto done;
3354 if (cdrom_print_info("\nCan play audio:\t",
3355 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3356 goto done;
3357 if (cdrom_print_info("\nCan write CD-R:\t",
3358 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3359 goto done;
3360 if (cdrom_print_info("\nCan write CD-RW:",
3361 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3362 goto done;
3363 if (cdrom_print_info("\nCan read DVD:\t",
3364 CDC_DVD, info, &pos, CTL_CAPABILITY))
3365 goto done;
3366 if (cdrom_print_info("\nCan write DVD-R:",
3367 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3368 goto done;
3369 if (cdrom_print_info("\nCan write DVD-RAM:",
3370 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3371 goto done;
3372 if (cdrom_print_info("\nCan read MRW:\t",
3373 CDC_MRW, info, &pos, CTL_CAPABILITY))
3374 goto done;
3375 if (cdrom_print_info("\nCan write MRW:\t",
3376 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3377 goto done;
3378 if (cdrom_print_info("\nCan write RAM:\t",
3379 CDC_RAM, info, &pos, CTL_CAPABILITY))
3380 goto done;
3381 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3382 goto done;
3383 doit:
3384 mutex_unlock(&cdrom_mutex);
3385 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3386 done:
3387 printk(KERN_INFO "cdrom: info buffer too small\n");
3388 goto doit;
3389 }
3390
3391 /* Unfortunately, per device settings are not implemented through
3392 procfs/sysctl yet. When they are, this will naturally disappear. For now
3393 just update all drives. Later this will become the template on which
3394 new registered drives will be based. */
3395 static void cdrom_update_settings(void)
3396 {
3397 struct cdrom_device_info *cdi;
3398
3399 mutex_lock(&cdrom_mutex);
3400 list_for_each_entry(cdi, &cdrom_list, list) {
3401 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3402 cdi->options |= CDO_AUTO_CLOSE;
3403 else if (!autoclose)
3404 cdi->options &= ~CDO_AUTO_CLOSE;
3405 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3406 cdi->options |= CDO_AUTO_EJECT;
3407 else if (!autoeject)
3408 cdi->options &= ~CDO_AUTO_EJECT;
3409 if (lockdoor && CDROM_CAN(CDC_LOCK))
3410 cdi->options |= CDO_LOCK;
3411 else if (!lockdoor)
3412 cdi->options &= ~CDO_LOCK;
3413 if (check_media_type)
3414 cdi->options |= CDO_CHECK_TYPE;
3415 else
3416 cdi->options &= ~CDO_CHECK_TYPE;
3417 }
3418 mutex_unlock(&cdrom_mutex);
3419 }
3420
3421 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3422 void __user *buffer, size_t *lenp, loff_t *ppos)
3423 {
3424 int ret;
3425
3426 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3427
3428 if (write) {
3429
3430 /* we only care for 1 or 0. */
3431 autoclose = !!cdrom_sysctl_settings.autoclose;
3432 autoeject = !!cdrom_sysctl_settings.autoeject;
3433 debug = !!cdrom_sysctl_settings.debug;
3434 lockdoor = !!cdrom_sysctl_settings.lock;
3435 check_media_type = !!cdrom_sysctl_settings.check;
3436
3437 /* update the option flags according to the changes. we
3438 don't have per device options through sysctl yet,
3439 but we will have and then this will disappear. */
3440 cdrom_update_settings();
3441 }
3442
3443 return ret;
3444 }
3445
3446 /* Place files in /proc/sys/dev/cdrom */
3447 static ctl_table cdrom_table[] = {
3448 {
3449 .procname = "info",
3450 .data = &cdrom_sysctl_settings.info,
3451 .maxlen = CDROM_STR_SIZE,
3452 .mode = 0444,
3453 .proc_handler = &cdrom_sysctl_info,
3454 },
3455 {
3456 .procname = "autoclose",
3457 .data = &cdrom_sysctl_settings.autoclose,
3458 .maxlen = sizeof(int),
3459 .mode = 0644,
3460 .proc_handler = &cdrom_sysctl_handler,
3461 },
3462 {
3463 .procname = "autoeject",
3464 .data = &cdrom_sysctl_settings.autoeject,
3465 .maxlen = sizeof(int),
3466 .mode = 0644,
3467 .proc_handler = &cdrom_sysctl_handler,
3468 },
3469 {
3470 .procname = "debug",
3471 .data = &cdrom_sysctl_settings.debug,
3472 .maxlen = sizeof(int),
3473 .mode = 0644,
3474 .proc_handler = &cdrom_sysctl_handler,
3475 },
3476 {
3477 .procname = "lock",
3478 .data = &cdrom_sysctl_settings.lock,
3479 .maxlen = sizeof(int),
3480 .mode = 0644,
3481 .proc_handler = &cdrom_sysctl_handler,
3482 },
3483 {
3484 .procname = "check_media",
3485 .data = &cdrom_sysctl_settings.check,
3486 .maxlen = sizeof(int),
3487 .mode = 0644,
3488 .proc_handler = &cdrom_sysctl_handler
3489 },
3490 { .ctl_name = 0 }
3491 };
3492
3493 static ctl_table cdrom_cdrom_table[] = {
3494 {
3495 .ctl_name = DEV_CDROM,
3496 .procname = "cdrom",
3497 .maxlen = 0,
3498 .mode = 0555,
3499 .child = cdrom_table,
3500 },
3501 { .ctl_name = 0 }
3502 };
3503
3504 /* Make sure that /proc/sys/dev is there */
3505 static ctl_table cdrom_root_table[] = {
3506 {
3507 .ctl_name = CTL_DEV,
3508 .procname = "dev",
3509 .maxlen = 0,
3510 .mode = 0555,
3511 .child = cdrom_cdrom_table,
3512 },
3513 { .ctl_name = 0 }
3514 };
3515 static struct ctl_table_header *cdrom_sysctl_header;
3516
3517 static void cdrom_sysctl_register(void)
3518 {
3519 static int initialized;
3520
3521 if (initialized == 1)
3522 return;
3523
3524 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3525
3526 /* set the defaults */
3527 cdrom_sysctl_settings.autoclose = autoclose;
3528 cdrom_sysctl_settings.autoeject = autoeject;
3529 cdrom_sysctl_settings.debug = debug;
3530 cdrom_sysctl_settings.lock = lockdoor;
3531 cdrom_sysctl_settings.check = check_media_type;
3532
3533 initialized = 1;
3534 }
3535
3536 static void cdrom_sysctl_unregister(void)
3537 {
3538 if (cdrom_sysctl_header)
3539 unregister_sysctl_table(cdrom_sysctl_header);
3540 }
3541
3542 #else /* CONFIG_SYSCTL */
3543
3544 static void cdrom_sysctl_register(void)
3545 {
3546 }
3547
3548 static void cdrom_sysctl_unregister(void)
3549 {
3550 }
3551
3552 #endif /* CONFIG_SYSCTL */
3553
3554 static int __init cdrom_init(void)
3555 {
3556 cdrom_sysctl_register();
3557
3558 return 0;
3559 }
3560
3561 static void __exit cdrom_exit(void)
3562 {
3563 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3564 cdrom_sysctl_unregister();
3565 }
3566
3567 module_init(cdrom_init);
3568 module_exit(cdrom_exit);
3569 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards