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[PATCH] i2c: Prevent deadlock on i2c client registration
[deliverable/linux.git] / drivers / cdrom / cdrom.c
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1da177e4
LT		 1/* linux/drivers/cdrom/cdrom.c.
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to 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
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
702.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243-------------------------------------------------------------------------*/
244
245#define 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
1da177e4
LT		 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 */
287static int debug;
288/* used to keep tray locked at all times */
289static int keeplocked;
290/* default compatibility mode */
291static int autoclose=1;
292static int autoeject;
293static int lockdoor = 1;
294/* will we ever get to use this... sigh. */
295static int check_media_type;
296/* automatically restart mrw format */
297static int mrw_format_restart = 1;
298module_param(debug, bool, 0);
299module_param(autoclose, bool, 0);
300module_param(autoeject, bool, 0);
301module_param(lockdoor, bool, 0);
302module_param(check_media_type, bool, 0);
303module_param(mrw_format_restart, bool, 0);
304
305static DEFINE_SPINLOCK(cdrom_lock);
306
307static const char *mrw_format_status[] = {
308 "not mrw",
309 "bgformat inactive",
310 "bgformat active",
311 "mrw complete",
312};
313
314static 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/* Not-exported routines. */
341static int open_for_data(struct cdrom_device_info * cdi);
342static int check_for_audio_disc(struct cdrom_device_info * cdi,
343 struct cdrom_device_ops * cdo);
344static void sanitize_format(union cdrom_addr *addr,
345 u_char * curr, u_char requested);
346static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
347 unsigned long arg);
348
349int cdrom_get_last_written(struct cdrom_device_info *, long *);
350static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
351static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
352
353static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
354
355static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
356
357#ifdef CONFIG_SYSCTL
358static void cdrom_sysctl_register(void);
359#endif /* CONFIG_SYSCTL */
360static struct cdrom_device_info *topCdromPtr;
361
362static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
363 struct packet_command *cgc)
364{
365 if (cgc->sense) {
366 cgc->sense->sense_key = 0x05;
367 cgc->sense->asc = 0x20;
368 cgc->sense->ascq = 0x00;
369 }
370
371 cgc->stat = -EIO;
372 return -EIO;
373}
374
375/* This macro makes sure we don't have to check on cdrom_device_ops
376 * existence in the run-time routines below. Change_capability is a
377 * hack to have the capability flags defined const, while we can still
378 * change it here without gcc complaining at every line.
379 */
380#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
381
382int register_cdrom(struct cdrom_device_info *cdi)
383{
384 static char banner_printed;
385 struct cdrom_device_ops *cdo = cdi->ops;
386 int *change_capability = (int *)&cdo->capability; /* hack */
387
388 cdinfo(CD_OPEN, "entering register_cdrom\n");
389
390 if (cdo->open == NULL || cdo->release == NULL)
391 return -2;
392 if (!banner_printed) {
393 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
394 banner_printed = 1;
395#ifdef CONFIG_SYSCTL
396 cdrom_sysctl_register();
397#endif /* CONFIG_SYSCTL */
398 }
399
400 ENSURE(drive_status, CDC_DRIVE_STATUS );
401 ENSURE(media_changed, CDC_MEDIA_CHANGED);
402 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
403 ENSURE(lock_door, CDC_LOCK);
404 ENSURE(select_speed, CDC_SELECT_SPEED);
405 ENSURE(get_last_session, CDC_MULTI_SESSION);
406 ENSURE(get_mcn, CDC_MCN);
407 ENSURE(reset, CDC_RESET);
408 ENSURE(audio_ioctl, CDC_PLAY_AUDIO);
1da177e4
LT		 409 ENSURE(generic_packet, CDC_GENERIC_PACKET);
410 cdi->mc_flags = 0;
411 cdo->n_minors = 0;
412 cdi->options = CDO_USE_FFLAGS;
413
414 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
415 cdi->options |= (int) CDO_AUTO_CLOSE;
416 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
417 cdi->options |= (int) CDO_AUTO_EJECT;
418 if (lockdoor==1)
419 cdi->options |= (int) CDO_LOCK;
420 if (check_media_type==1)
421 cdi->options |= (int) CDO_CHECK_TYPE;
422
423 if (CDROM_CAN(CDC_MRW_W))
424 cdi->exit = cdrom_mrw_exit;
425
426 if (cdi->disk)
427 cdi->cdda_method = CDDA_BPC_FULL;
428 else
429 cdi->cdda_method = CDDA_OLD;
430
431 if (!cdo->generic_packet)
432 cdo->generic_packet = cdrom_dummy_generic_packet;
433
434 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
435 spin_lock(&cdrom_lock);
436 cdi->next = topCdromPtr;
437 topCdromPtr = cdi;
438 spin_unlock(&cdrom_lock);
439 return 0;
440}
441#undef ENSURE
442
443int unregister_cdrom(struct cdrom_device_info *unreg)
444{
445 struct cdrom_device_info *cdi, *prev;
446 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
447
448 prev = NULL;
449 spin_lock(&cdrom_lock);
450 cdi = topCdromPtr;
451 while (cdi && cdi != unreg) {
452 prev = cdi;
453 cdi = cdi->next;
454 }
455
456 if (cdi == NULL) {
457 spin_unlock(&cdrom_lock);
458 return -2;
459 }
460 if (prev)
461 prev->next = cdi->next;
462 else
463 topCdromPtr = cdi->next;
464
465 spin_unlock(&cdrom_lock);
466
467 if (cdi->exit)
468 cdi->exit(cdi);
469
470 cdi->ops->n_minors--;
471 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
472 return 0;
473}
474
475int cdrom_get_media_event(struct cdrom_device_info *cdi,
476 struct media_event_desc *med)
477{
478 struct packet_command cgc;
479 unsigned char buffer[8];
480 struct event_header *eh = (struct event_header *) buffer;
481
482 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
483 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
484 cgc.cmd[1] = 1; /* IMMED */
485 cgc.cmd[4] = 1 << 4; /* media event */
486 cgc.cmd[8] = sizeof(buffer);
487 cgc.quiet = 1;
488
489 if (cdi->ops->generic_packet(cdi, &cgc))
490 return 1;
491
492 if (be16_to_cpu(eh->data_len) < sizeof(*med))
493 return 1;
494
495 if (eh->nea || eh->notification_class != 0x4)
496 return 1;
497
498 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
499 return 0;
500}
501
502/*
503 * the first prototypes used 0x2c as the page code for the mrw mode page,
504 * subsequently this was changed to 0x03. probe the one used by this drive
505 */
506static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
507{
508 struct packet_command cgc;
509 char buffer[16];
510
511 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
512
513 cgc.timeout = HZ;
514 cgc.quiet = 1;
515
516 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
517 cdi->mrw_mode_page = MRW_MODE_PC;
518 return 0;
519 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
520 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
521 return 0;
522 }
523
524 return 1;
525}
526
527static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
528{
529 struct packet_command cgc;
530 struct mrw_feature_desc *mfd;
531 unsigned char buffer[16];
532 int ret;
533
534 *write = 0;
535
536 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
537
538 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
539 cgc.cmd[3] = CDF_MRW;
540 cgc.cmd[8] = sizeof(buffer);
541 cgc.quiet = 1;
542
543 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
544 return ret;
545
546 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
547 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
548 return 1;
549 *write = mfd->write;
550
551 if ((ret = cdrom_mrw_probe_pc(cdi))) {
552 *write = 0;
553 return ret;
554 }
555
556 return 0;
557}
558
559static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
560{
561 struct packet_command cgc;
562 unsigned char buffer[12];
563 int ret;
564
565 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
566
567 /*
568 * FmtData bit set (bit 4), format type is 1
569 */
570 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
571 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
572 cgc.cmd[1] = (1 << 4) | 1;
573
574 cgc.timeout = 5 * 60 * HZ;
575
576 /*
577 * 4 byte format list header, 8 byte format list descriptor
578 */
579 buffer[1] = 1 << 1;
580 buffer[3] = 8;
581
582 /*
583 * nr_blocks field
584 */
585 buffer[4] = 0xff;
586 buffer[5] = 0xff;
587 buffer[6] = 0xff;
588 buffer[7] = 0xff;
589
590 buffer[8] = 0x24 << 2;
591 buffer[11] = cont;
592
593 ret = cdi->ops->generic_packet(cdi, &cgc);
594 if (ret)
595 printk(KERN_INFO "cdrom: bgformat failed\n");
596
597 return ret;
598}
599
600static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
601{
602 struct packet_command cgc;
603
604 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
605 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
606
607 /*
608 * Session = 1, Track = 0
609 */
610 cgc.cmd[1] = !!immed;
611 cgc.cmd[2] = 1 << 1;
612
613 cgc.timeout = 5 * 60 * HZ;
614
615 return cdi->ops->generic_packet(cdi, &cgc);
616}
617
618static int cdrom_flush_cache(struct cdrom_device_info *cdi)
619{
620 struct packet_command cgc;
621
622 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
623 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
624
625 cgc.timeout = 5 * 60 * HZ;
626
627 return cdi->ops->generic_packet(cdi, &cgc);
628}
629
630static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
631{
632 disc_information di;
633 int ret;
634
635 ret = cdrom_get_disc_info(cdi, &di);
636 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
637 return 1;
638
639 ret = 0;
640 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
641 printk(KERN_INFO "cdrom: issuing MRW back ground "
642 "format suspend\n");
643 ret = cdrom_mrw_bgformat_susp(cdi, 0);
644 }
645
7da21a02 646 if (!ret && cdi->media_written)
1da177e4
LT		 647 ret = cdrom_flush_cache(cdi);
648
649 return ret;
650}
651
652static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
653{
654 struct packet_command cgc;
655 struct mode_page_header *mph;
656 char buffer[16];
657 int ret, offset, size;
658
659 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
660
661 cgc.buffer = buffer;
662 cgc.buflen = sizeof(buffer);
663
664 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
665 return ret;
666
667 mph = (struct mode_page_header *) buffer;
668 offset = be16_to_cpu(mph->desc_length);
669 size = be16_to_cpu(mph->mode_data_length) + 2;
670
671 buffer[offset + 3] = space;
672 cgc.buflen = size;
673
674 if ((ret = cdrom_mode_select(cdi, &cgc)))
675 return ret;
676
677 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
678 return 0;
679}
680
681static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
682 struct rwrt_feature_desc *rfd)
683{
684 struct packet_command cgc;
685 char buffer[24];
686 int ret;
687
688 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
689
690 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
691 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
692 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
693 cgc.quiet = 1;
694
695 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
696 return ret;
697
698 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
699 return 0;
700}
701
702static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
703{
704 struct packet_command cgc;
705 char buffer[16];
706 __u16 *feature_code;
707 int ret;
708
709 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
710
711 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
712 cgc.cmd[3] = CDF_HWDM;
713 cgc.cmd[8] = sizeof(buffer);
714 cgc.quiet = 1;
715
716 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
717 return ret;
718
719 feature_code = (__u16 *) &buffer[sizeof(struct feature_header)];
720 if (be16_to_cpu(*feature_code) == CDF_HWDM)
721 return 0;
722
723 return 1;
724}
725
726
727static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
728{
729 struct rwrt_feature_desc rfd;
730 int ret;
731
732 *write = 0;
733
734 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
735 return ret;
736
737 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
738 *write = 1;
739
740 return 0;
741}
742
743static int cdrom_media_erasable(struct cdrom_device_info *cdi)
744{
745 disc_information di;
746 int ret;
747
748 ret = cdrom_get_disc_info(cdi, &di);
749 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
750 return -1;
751
752 return di.erasable;
753}
754
755/*
756 * FIXME: check RO bit
757 */
758static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
759{
760 int ret = cdrom_media_erasable(cdi);
761
762 /*
763 * allow writable open if media info read worked and media is
764 * erasable, _or_ if it fails since not all drives support it
765 */
766 if (!ret)
767 return 1;
768
769 return 0;
770}
771
772static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
773{
774 disc_information di;
775 int ret;
776
777 /*
778 * always reset to DMA lba space on open
779 */
780 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
781 printk(KERN_ERR "cdrom: failed setting lba address space\n");
782 return 1;
783 }
784
785 ret = cdrom_get_disc_info(cdi, &di);
786 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
787 return 1;
788
789 if (!di.erasable)
790 return 1;
791
792 /*
793 * mrw_status
794 * 0 - not MRW formatted
795 * 1 - MRW bgformat started, but not running or complete
796 * 2 - MRW bgformat in progress
797 * 3 - MRW formatting complete
798 */
799 ret = 0;
800 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
801 mrw_format_status[di.mrw_status]);
802 if (!di.mrw_status)
803 ret = 1;
804 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
805 mrw_format_restart)
806 ret = cdrom_mrw_bgformat(cdi, 1);
807
808 return ret;
809}
810
811static int mo_open_write(struct cdrom_device_info *cdi)
812{
813 struct packet_command cgc;
814 char buffer[255];
815 int ret;
816
817 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
818 cgc.quiet = 1;
819
820 /*
821 * obtain write protect information as per
822 * drivers/scsi/sd.c:sd_read_write_protect_flag
823 */
824
825 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
826 if (ret)
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
828 if (ret) {
829 cgc.buflen = 255;
830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
831 }
832
833 /* drive gave us no info, let the user go ahead */
834 if (ret)
835 return 0;
836
837 return buffer[3] & 0x80;
838}
839
840static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
841{
842 struct rwrt_feature_desc rfd;
843 int ret;
844
845 if ((ret = cdrom_has_defect_mgt(cdi)))
846 return ret;
847
848 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
849 return ret;
850 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
851 ret = !rfd.curr;
852
853 cdinfo(CD_OPEN, "can open for random write\n");
854 return ret;
855}
856
857static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
858{
859 struct packet_command cgc;
860 char buffer[32];
861 int ret, mmc3_profile;
862
863 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
864
865 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
866 cgc.cmd[1] = 0;
867 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
868 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
869 cgc.quiet = 1;
870
871 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
872 mmc3_profile = 0xffff;
873 else
874 mmc3_profile = (buffer[6] << 8) | buffer[7];
875
876 cdi->mmc3_profile = mmc3_profile;
877}
878
879static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
880{
881 switch (cdi->mmc3_profile) {
882 case 0x12: /* DVD-RAM */
883 case 0x1A: /* DVD+RW */
884 return 0;
885 default:
886 return 1;
887 }
888}
889
890/*
891 * returns 0 for ok to open write, non-0 to disallow
892 */
893static int cdrom_open_write(struct cdrom_device_info *cdi)
894{
895 int mrw, mrw_write, ram_write;
896 int ret = 1;
897
898 mrw = 0;
899 if (!cdrom_is_mrw(cdi, &mrw_write))
900 mrw = 1;
901
902 if (CDROM_CAN(CDC_MO_DRIVE))
903 ram_write = 1;
904 else
905 (void) cdrom_is_random_writable(cdi, &ram_write);
906
907 if (mrw)
908 cdi->mask &= ~CDC_MRW;
909 else
910 cdi->mask |= CDC_MRW;
911
912 if (mrw_write)
913 cdi->mask &= ~CDC_MRW_W;
914 else
915 cdi->mask |= CDC_MRW_W;
916
917 if (ram_write)
918 cdi->mask &= ~CDC_RAM;
919 else
920 cdi->mask |= CDC_RAM;
921
922 if (CDROM_CAN(CDC_MRW_W))
923 ret = cdrom_mrw_open_write(cdi);
924 else if (CDROM_CAN(CDC_DVD_RAM))
925 ret = cdrom_dvdram_open_write(cdi);
926 else if (CDROM_CAN(CDC_RAM) &&
927 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
928 ret = cdrom_ram_open_write(cdi);
929 else if (CDROM_CAN(CDC_MO_DRIVE))
930 ret = mo_open_write(cdi);
931 else if (!cdrom_is_dvd_rw(cdi))
932 ret = 0;
933
934 return ret;
935}
936
937static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
938{
939 struct packet_command cgc;
940
941 if (cdi->mmc3_profile != 0x1a) {
942 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
943 return;
944 }
945
946 if (!cdi->media_written) {
947 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
948 return;
949 }
950
951 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
952 cdi->name);
953
954 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
955 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
956 cgc.timeout = 30*HZ;
957 cdi->ops->generic_packet(cdi, &cgc);
958
959 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
960 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
961 cgc.timeout = 3000*HZ;
962 cgc.quiet = 1;
963 cdi->ops->generic_packet(cdi, &cgc);
964
965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
966 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
967 cgc.cmd[2] = 2; /* Close session */
968 cgc.quiet = 1;
969 cgc.timeout = 3000*HZ;
970 cdi->ops->generic_packet(cdi, &cgc);
971
972 cdi->media_written = 0;
973}
974
975static int cdrom_close_write(struct cdrom_device_info *cdi)
976{
977#if 0
978 return cdrom_flush_cache(cdi);
979#else
980 return 0;
981#endif
982}
983
984/* We use the open-option O_NONBLOCK to indicate that the
985 * purpose of opening is only for subsequent ioctl() calls; no device
986 * integrity checks are performed.
987 *
988 * We hope that all cd-player programs will adopt this convention. It
989 * is in their own interest: device control becomes a lot easier
990 * this way.
991 */
992int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp)
993{
994 int ret;
995
996 cdinfo(CD_OPEN, "entering cdrom_open\n");
997
998 /* if this was a O_NONBLOCK open and we should honor the flags,
999 * do a quick open without drive/disc integrity checks. */
1000 cdi->use_count++;
1001 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) {
1002 ret = cdi->ops->open(cdi, 1);
1003 } else {
1004 ret = open_for_data(cdi);
1005 if (ret)
1006 goto err;
1007 cdrom_mmc3_profile(cdi);
1008 if (fp->f_mode & FMODE_WRITE) {
1009 ret = -EROFS;
1010 if (cdrom_open_write(cdi))
16070428 1011 goto err_release;
1da177e4 1012 if (!CDROM_CAN(CDC_RAM))
16070428 1013 goto err_release;
1da177e4
LT		 1014 ret = 0;
1015 cdi->media_written = 0;
1016 }
1017 }
1018
1019 if (ret)
1020 goto err;
1021
1022 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1023 cdi->name, cdi->use_count);
1024 /* Do this on open. Don't wait for mount, because they might
1025 not be mounting, but opening with O_NONBLOCK */
1026 check_disk_change(ip->i_bdev);
1027 return 0;
16070428
JA		 1028err_release:
1029 cdi->ops->release(cdi);
1da177e4
LT		 1030err:
1031 cdi->use_count--;
1032 return ret;
1033}
1034
1035static
1036int open_for_data(struct cdrom_device_info * cdi)
1037{
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
1041 cdinfo(CD_OPEN, "entering open_for_data\n");
1042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1046 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1047 if (ret == CDS_TRAY_OPEN) {
1048 cdinfo(CD_OPEN, "the tray is open...\n");
1049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
1052 cdinfo(CD_OPEN, "trying to close the tray.\n");
1053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
1055 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
1065 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1072 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
1077 cdinfo(CD_OPEN, "the tray is now closed.\n");
1078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
1088 cdinfo(CD_OPEN, "bummer. no disc.\n");
1089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
1098 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1099 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)current->pid);
1101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
1105 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1106 }
1107 }
1108
1109 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
1113 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
1118 cdinfo(CD_OPEN, "open device failed.\n");
1119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
1123 cdinfo(CD_OPEN, "door locked.\n");
1124 }
1125 cdinfo(CD_OPEN, "device opened successfully.\n");
1126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
00d6da9b 1134 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
1137 cdinfo(CD_OPEN, "door unlocked.\n");
1138 }
1139 return ret;
1140}
1141
1142/* This code is similar to that in open_for_data. The routine is called
1143 whenever an audio play operation is requested.
1144*/
1145int check_for_audio_disc(struct cdrom_device_info * cdi,
1146 struct cdrom_device_ops * cdo)
1147{
1148 int ret;
1149 tracktype tracks;
1150 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1151 if (!(cdi->options & CDO_CHECK_TYPE))
1152 return 0;
1153 if (cdo->drive_status != NULL) {
1154 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1155 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1156 if (ret == CDS_TRAY_OPEN) {
1157 cdinfo(CD_OPEN, "the tray is open...\n");
1158 /* can/may i close it? */
1159 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1160 cdi->options & CDO_AUTO_CLOSE) {
1161 cdinfo(CD_OPEN, "trying to close the tray.\n");
1162 ret=cdo->tray_move(cdi,0);
1163 if (ret) {
1164 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1165 /* Ignore the error from the low
1166 level driver. We don't care why it
1167 couldn't close the tray. We only care
1168 that there is no disc in the drive,
1169 since that is the _REAL_ problem here.*/
1170 return -ENOMEDIUM;
1171 }
1172 } else {
1173 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1174 return -ENOMEDIUM;
1175 }
1176 /* Ok, the door should be closed now.. Check again */
1177 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1178 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1179 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1180 return -ENOMEDIUM;
1181 }
1182 if (ret!=CDS_DISC_OK) {
1183 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1184 return -EIO;
1185 }
1186 cdinfo(CD_OPEN, "the tray is now closed.\n");
1187 }
1188 }
1189 cdrom_count_tracks(cdi, &tracks);
1190 if (tracks.error)
1191 return(tracks.error);
1192
1193 if (tracks.audio==0)
1194 return -EMEDIUMTYPE;
1195
1196 return 0;
1197}
1198
1199/* Admittedly, the logic below could be performed in a nicer way. */
1200int cdrom_release(struct cdrom_device_info *cdi, struct file *fp)
1201{
1202 struct cdrom_device_ops *cdo = cdi->ops;
1203 int opened_for_data;
1204
1205 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1206
1207 if (cdi->use_count > 0)
1208 cdi->use_count--;
1209 if (cdi->use_count == 0)
1210 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1211 if (cdi->use_count == 0)
1212 cdrom_dvd_rw_close_write(cdi);
1213 if (cdi->use_count == 0 &&
1214 (cdo->capability & CDC_LOCK) && !keeplocked) {
1215 cdinfo(CD_CLOSE, "Unlocking door!\n");
1216 cdo->lock_door(cdi, 0);
1217 }
1218 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1219 !(fp && fp->f_flags & O_NONBLOCK);
1220
1221 /*
1222 * flush cache on last write release
1223 */
1224 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1225 cdrom_close_write(cdi);
1226
1227 cdo->release(cdi);
1228 if (cdi->use_count == 0) { /* last process that closes dev*/
1229 if (opened_for_data &&
1230 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1231 cdo->tray_move(cdi, 1);
1232 }
1233 return 0;
1234}
1235
1236static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1237 struct cdrom_changer_info *buf)
1238{
1239 struct packet_command cgc;
1240 struct cdrom_device_ops *cdo = cdi->ops;
1241 int length;
1242
1243 /*
1244 * Sanyo changer isn't spec compliant (doesn't use regular change
1245 * LOAD_UNLOAD command, and it doesn't implement the mech status
1246 * command below
1247 */
1248 if (cdi->sanyo_slot) {
1249 buf->hdr.nslots = 3;
1250 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1251 for (length = 0; length < 3; length++) {
1252 buf->slots[length].disc_present = 1;
1253 buf->slots[length].change = 0;
1254 }
1255 return 0;
1256 }
1257
1258 length = sizeof(struct cdrom_mechstat_header) +
1259 cdi->capacity * sizeof(struct cdrom_slot);
1260
1261 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1262 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1263 cgc.cmd[8] = (length >> 8) & 0xff;
1264 cgc.cmd[9] = length & 0xff;
1265 return cdo->generic_packet(cdi, &cgc);
1266}
1267
1268static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1269{
1270 struct cdrom_changer_info *info;
1271 int ret;
1272
1273 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1274 if (cdi->sanyo_slot)
1275 return CDS_NO_INFO;
1276
1277 info = kmalloc(sizeof(*info), GFP_KERNEL);
1278 if (!info)
1279 return -ENOMEM;
1280
1281 if ((ret = cdrom_read_mech_status(cdi, info)))
1282 goto out_free;
1283
1284 if (info->slots[slot].disc_present)
1285 ret = CDS_DISC_OK;
1286 else
1287 ret = CDS_NO_DISC;
1288
1289out_free:
1290 kfree(info);
1291 return ret;
1292}
1293
1294/* Return the number of slots for an ATAPI/SCSI cdrom,
1295 * return 1 if not a changer.
1296 */
1297int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1298{
1299 int status;
1300 int nslots = 1;
1301 struct cdrom_changer_info *info;
1302
1303 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1304 /* cdrom_read_mech_status requires a valid value for capacity: */
1305 cdi->capacity = 0;
1306
1307 info = kmalloc(sizeof(*info), GFP_KERNEL);
1308 if (!info)
1309 return -ENOMEM;
1310
1311 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1312 nslots = info->hdr.nslots;
1313
1314 kfree(info);
1315 return nslots;
1316}
1317
1318
1319/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1320static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1321{
1322 struct packet_command cgc;
1323
1324 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1325 if (cdi->sanyo_slot && slot < 0)
1326 return 0;
1327
1328 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1329 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1330 cgc.cmd[4] = 2 + (slot >= 0);
1331 cgc.cmd[8] = slot;
1332 cgc.timeout = 60 * HZ;
1333
1334 /* The Sanyo 3 CD changer uses byte 7 of the
1335 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1336 using the GPCMD_LOAD_UNLOAD opcode. */
1337 if (cdi->sanyo_slot && -1 < slot) {
1338 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1339 cgc.cmd[7] = slot;
1340 cgc.cmd[4] = cgc.cmd[8] = 0;
1341 cdi->sanyo_slot = slot ? slot : 3;
1342 }
1343
1344 return cdi->ops->generic_packet(cdi, &cgc);
1345}
1346
1347static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1348{
1349 struct cdrom_changer_info *info;
1350 int curslot;
1351 int ret;
1352
1353 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1354 if (!CDROM_CAN(CDC_SELECT_DISC))
1355 return -EDRIVE_CANT_DO_THIS;
1356
1357 (void) cdi->ops->media_changed(cdi, slot);
1358
1359 if (slot == CDSL_NONE) {
1360 /* set media changed bits, on both queues */
1361 cdi->mc_flags = 0x3;
1362 return cdrom_load_unload(cdi, -1);
1363 }
1364
1365 info = kmalloc(sizeof(*info), GFP_KERNEL);
1366 if (!info)
1367 return -ENOMEM;
1368
1369 if ((ret = cdrom_read_mech_status(cdi, info))) {
1370 kfree(info);
1371 return ret;
1372 }
1373
1374 curslot = info->hdr.curslot;
1375 kfree(info);
1376
1377 if (cdi->use_count > 1 || keeplocked) {
1378 if (slot == CDSL_CURRENT) {
1379 return curslot;
1380 } else {
1381 return -EBUSY;
1382 }
1383 }
1384
1385 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1386 which is useful if it had been previously unloaded.
1387 Whether it can or not, it returns the current slot.
1388 Similarly, if slot happens to be the current one, we still
1389 try and load it. */
1390 if (slot == CDSL_CURRENT)
1391 slot = curslot;
1392
1393 /* set media changed bits on both queues */
1394 cdi->mc_flags = 0x3;
1395 if ((ret = cdrom_load_unload(cdi, slot)))
1396 return ret;
1397
1398 return slot;
1399}
1400
1401/* We want to make media_changed accessible to the user through an
1402 * ioctl. The main problem now is that we must double-buffer the
1403 * low-level implementation, to assure that the VFS and the user both
1404 * see a medium change once.
1405 */
1406
1407static
1408int media_changed(struct cdrom_device_info *cdi, int queue)
1409{
1410 unsigned int mask = (1 << (queue & 1));
1411 int ret = !!(cdi->mc_flags & mask);
1412
1413 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1414 return ret;
1415 /* changed since last call? */
1416 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1417 cdi->mc_flags = 0x3; /* set bit on both queues */
1418 ret |= 1;
1419 cdi->media_written = 0;
1420 }
1421 cdi->mc_flags &= ~mask; /* clear bit */
1422 return ret;
1423}
1424
1425int cdrom_media_changed(struct cdrom_device_info *cdi)
1426{
1427 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1428 * Returning "0" is always safe (media hasn't been changed). Do that
1429 * if the low-level cdrom driver dosn't support media changed. */
1430 if (cdi == NULL || cdi->ops->media_changed == NULL)
1431 return 0;
1432 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1433 return 0;
1434 return media_changed(cdi, 0);
1435}
1436
1437/* badly broken, I know. Is due for a fixup anytime. */
1438static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1439{
1440 struct cdrom_tochdr header;
1441 struct cdrom_tocentry entry;
1442 int ret, i;
1443 tracks->data=0;
1444 tracks->audio=0;
1445 tracks->cdi=0;
1446 tracks->xa=0;
1447 tracks->error=0;
1448 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1449 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 /* Grab the TOC header so we can see how many tracks there are */
1454 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1455 if (ret == -ENOMEDIUM)
1456 tracks->error = CDS_NO_DISC;
1457 else
1458 tracks->error = CDS_NO_INFO;
1459 return;
1460 }
1461 /* check what type of tracks are on this disc */
1462 entry.cdte_format = CDROM_MSF;
1463 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1464 entry.cdte_track = i;
1465 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1466 tracks->error=CDS_NO_INFO;
1467 return;
1468 }
1469 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1470 if (entry.cdte_format == 0x10)
1471 tracks->cdi++;
1472 else if (entry.cdte_format == 0x20)
1473 tracks->xa++;
1474 else
1475 tracks->data++;
1476 } else
1477 tracks->audio++;
1478 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1479 i, entry.cdte_format, entry.cdte_ctrl);
1480 }
1481 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1482 header.cdth_trk1, tracks->audio, tracks->data,
1483 tracks->cdi, tracks->xa);
1484}
1485
1486/* Requests to the low-level drivers will /always/ be done in the
1487 following format convention:
1488
1489 CDROM_LBA: all data-related requests.
1490 CDROM_MSF: all audio-related requests.
1491
1492 However, a low-level implementation is allowed to refuse this
1493 request, and return information in its own favorite format.
1494
1495 It doesn't make sense /at all/ to ask for a play_audio in LBA
1496 format, or ask for multi-session info in MSF format. However, for
1497 backward compatibility these format requests will be satisfied, but
1498 the requests to the low-level drivers will be sanitized in the more
1499 meaningful format indicated above.
1500 */
1501
1502static
1503void sanitize_format(union cdrom_addr *addr,
1504 u_char * curr, u_char requested)
1505{
1506 if (*curr == requested)
1507 return; /* nothing to be done! */
1508 if (requested == CDROM_LBA) {
1509 addr->lba = (int) addr->msf.frame +
1510 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1511 } else { /* CDROM_MSF */
1512 int lba = addr->lba;
1513 addr->msf.frame = lba % 75;
1514 lba /= 75;
1515 lba += 2;
1516 addr->msf.second = lba % 60;
1517 addr->msf.minute = lba / 60;
1518 }
1519 *curr = requested;
1520}
1521
1522void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1523 int type)
1524{
1525 memset(cgc, 0, sizeof(struct packet_command));
1526 if (buf)
1527 memset(buf, 0, len);
1528 cgc->buffer = (char *) buf;
1529 cgc->buflen = len;
1530 cgc->data_direction = type;
1531 cgc->timeout = 5*HZ;
1532}
1533
1534/* DVD handling */
1535
1536#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1537#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1538
1539static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1540{
1541 cgc->cmd[0] = GPCMD_REPORT_KEY;
1542 cgc->cmd[10] = type | (agid << 6);
1543 switch (type) {
1544 case 0: case 8: case 5: {
1545 cgc->buflen = 8;
1546 break;
1547 }
1548 case 1: {
1549 cgc->buflen = 16;
1550 break;
1551 }
1552 case 2: case 4: {
1553 cgc->buflen = 12;
1554 break;
1555 }
1556 }
1557 cgc->cmd[9] = cgc->buflen;
1558 cgc->data_direction = CGC_DATA_READ;
1559}
1560
1561static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1562{
1563 cgc->cmd[0] = GPCMD_SEND_KEY;
1564 cgc->cmd[10] = type | (agid << 6);
1565 switch (type) {
1566 case 1: {
1567 cgc->buflen = 16;
1568 break;
1569 }
1570 case 3: {
1571 cgc->buflen = 12;
1572 break;
1573 }
1574 case 6: {
1575 cgc->buflen = 8;
1576 break;
1577 }
1578 }
1579 cgc->cmd[9] = cgc->buflen;
1580 cgc->data_direction = CGC_DATA_WRITE;
1581}
1582
1583static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1584{
1585 int ret;
1586 u_char buf[20];
1587 struct packet_command cgc;
1588 struct cdrom_device_ops *cdo = cdi->ops;
1589 rpc_state_t rpc_state;
1590
1591 memset(buf, 0, sizeof(buf));
1592 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1593
1594 switch (ai->type) {
1595 /* LU data send */
1596 case DVD_LU_SEND_AGID:
1597 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1598 cgc.quiet = 1;
1599 setup_report_key(&cgc, ai->lsa.agid, 0);
1600
1601 if ((ret = cdo->generic_packet(cdi, &cgc)))
1602 return ret;
1603
1604 ai->lsa.agid = buf[7] >> 6;
1605 /* Returning data, let host change state */
1606 break;
1607
1608 case DVD_LU_SEND_KEY1:
1609 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1610 setup_report_key(&cgc, ai->lsk.agid, 2);
1611
1612 if ((ret = cdo->generic_packet(cdi, &cgc)))
1613 return ret;
1614
1615 copy_key(ai->lsk.key, &buf[4]);
1616 /* Returning data, let host change state */
1617 break;
1618
1619 case DVD_LU_SEND_CHALLENGE:
1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1621 setup_report_key(&cgc, ai->lsc.agid, 1);
1622
1623 if ((ret = cdo->generic_packet(cdi, &cgc)))
1624 return ret;
1625
1626 copy_chal(ai->lsc.chal, &buf[4]);
1627 /* Returning data, let host change state */
1628 break;
1629
1630 /* Post-auth key */
1631 case DVD_LU_SEND_TITLE_KEY:
1632 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1633 cgc.quiet = 1;
1634 setup_report_key(&cgc, ai->lstk.agid, 4);
1635 cgc.cmd[5] = ai->lstk.lba;
1636 cgc.cmd[4] = ai->lstk.lba >> 8;
1637 cgc.cmd[3] = ai->lstk.lba >> 16;
1638 cgc.cmd[2] = ai->lstk.lba >> 24;
1639
1640 if ((ret = cdo->generic_packet(cdi, &cgc)))
1641 return ret;
1642
1643 ai->lstk.cpm = (buf[4] >> 7) & 1;
1644 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1645 ai->lstk.cgms = (buf[4] >> 4) & 3;
1646 copy_key(ai->lstk.title_key, &buf[5]);
1647 /* Returning data, let host change state */
1648 break;
1649
1650 case DVD_LU_SEND_ASF:
1651 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1652 setup_report_key(&cgc, ai->lsasf.agid, 5);
1653
1654 if ((ret = cdo->generic_packet(cdi, &cgc)))
1655 return ret;
1656
1657 ai->lsasf.asf = buf[7] & 1;
1658 break;
1659
1660 /* LU data receive (LU changes state) */
1661 case DVD_HOST_SEND_CHALLENGE:
1662 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1663 setup_send_key(&cgc, ai->hsc.agid, 1);
1664 buf[1] = 0xe;
1665 copy_chal(&buf[4], ai->hsc.chal);
1666
1667 if ((ret = cdo->generic_packet(cdi, &cgc)))
1668 return ret;
1669
1670 ai->type = DVD_LU_SEND_KEY1;
1671 break;
1672
1673 case DVD_HOST_SEND_KEY2:
1674 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1675 setup_send_key(&cgc, ai->hsk.agid, 3);
1676 buf[1] = 0xa;
1677 copy_key(&buf[4], ai->hsk.key);
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1680 ai->type = DVD_AUTH_FAILURE;
1681 return ret;
1682 }
1683 ai->type = DVD_AUTH_ESTABLISHED;
1684 break;
1685
1686 /* Misc */
1687 case DVD_INVALIDATE_AGID:
1688 cgc.quiet = 1;
1689 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1690 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1691 if ((ret = cdo->generic_packet(cdi, &cgc)))
1692 return ret;
1693 break;
1694
1695 /* Get region settings */
1696 case DVD_LU_SEND_RPC_STATE:
1697 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1698 setup_report_key(&cgc, 0, 8);
1699 memset(&rpc_state, 0, sizeof(rpc_state_t));
1700 cgc.buffer = (char *) &rpc_state;
1701
1702 if ((ret = cdo->generic_packet(cdi, &cgc)))
1703 return ret;
1704
1705 ai->lrpcs.type = rpc_state.type_code;
1706 ai->lrpcs.vra = rpc_state.vra;
1707 ai->lrpcs.ucca = rpc_state.ucca;
1708 ai->lrpcs.region_mask = rpc_state.region_mask;
1709 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1710 break;
1711
1712 /* Set region settings */
1713 case DVD_HOST_SEND_RPC_STATE:
1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1715 setup_send_key(&cgc, 0, 6);
1716 buf[1] = 6;
1717 buf[4] = ai->hrpcs.pdrc;
1718
1719 if ((ret = cdo->generic_packet(cdi, &cgc)))
1720 return ret;
1721 break;
1722
1723 default:
1724 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1725 return -ENOTTY;
1726 }
1727
1728 return 0;
1729}
1730
1731static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1732{
1733 unsigned char buf[21], *base;
1734 struct dvd_layer *layer;
1735 struct packet_command cgc;
1736 struct cdrom_device_ops *cdo = cdi->ops;
1737 int ret, layer_num = s->physical.layer_num;
1738
1739 if (layer_num >= DVD_LAYERS)
1740 return -EINVAL;
1741
1742 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1743 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1744 cgc.cmd[6] = layer_num;
1745 cgc.cmd[7] = s->type;
1746 cgc.cmd[9] = cgc.buflen & 0xff;
1747
1748 /*
1749 * refrain from reporting errors on non-existing layers (mainly)
1750 */
1751 cgc.quiet = 1;
1752
1753 if ((ret = cdo->generic_packet(cdi, &cgc)))
1754 return ret;
1755
1756 base = &buf[4];
1757 layer = &s->physical.layer[layer_num];
1758
1759 /*
1760 * place the data... really ugly, but at least we won't have to
1761 * worry about endianess in userspace.
1762 */
1763 memset(layer, 0, sizeof(*layer));
1764 layer->book_version = base[0] & 0xf;
1765 layer->book_type = base[0] >> 4;
1766 layer->min_rate = base[1] & 0xf;
1767 layer->disc_size = base[1] >> 4;
1768 layer->layer_type = base[2] & 0xf;
1769 layer->track_path = (base[2] >> 4) & 1;
1770 layer->nlayers = (base[2] >> 5) & 3;
1771 layer->track_density = base[3] & 0xf;
1772 layer->linear_density = base[3] >> 4;
1773 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1774 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1775 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1776 layer->bca = base[16] >> 7;
1777
1778 return 0;
1779}
1780
1781static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1782{
1783 int ret;
1784 u_char buf[8];
1785 struct packet_command cgc;
1786 struct cdrom_device_ops *cdo = cdi->ops;
1787
1788 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1789 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1790 cgc.cmd[6] = s->copyright.layer_num;
1791 cgc.cmd[7] = s->type;
1792 cgc.cmd[8] = cgc.buflen >> 8;
1793 cgc.cmd[9] = cgc.buflen & 0xff;
1794
1795 if ((ret = cdo->generic_packet(cdi, &cgc)))
1796 return ret;
1797
1798 s->copyright.cpst = buf[4];
1799 s->copyright.rmi = buf[5];
1800
1801 return 0;
1802}
1803
1804static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1805{
1806 int ret, size;
1807 u_char *buf;
1808 struct packet_command cgc;
1809 struct cdrom_device_ops *cdo = cdi->ops;
1810
1811 size = sizeof(s->disckey.value) + 4;
1812
1813 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
1814 return -ENOMEM;
1815
1816 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1817 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1818 cgc.cmd[7] = s->type;
1819 cgc.cmd[8] = size >> 8;
1820 cgc.cmd[9] = size & 0xff;
1821 cgc.cmd[10] = s->disckey.agid << 6;
1822
1823 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1824 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1825
1826 kfree(buf);
1827 return ret;
1828}
1829
1830static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1831{
1832 int ret;
1833 u_char buf[4 + 188];
1834 struct packet_command cgc;
1835 struct cdrom_device_ops *cdo = cdi->ops;
1836
1837 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1838 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1839 cgc.cmd[7] = s->type;
454d6fbc 1840 cgc.cmd[9] = cgc.buflen & 0xff;
1da177e4
LT		 1841
1842 if ((ret = cdo->generic_packet(cdi, &cgc)))
1843 return ret;
1844
1845 s->bca.len = buf[0] << 8 | buf[1];
1846 if (s->bca.len < 12 || s->bca.len > 188) {
1847 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
1848 return -EIO;
1849 }
1850 memcpy(s->bca.value, &buf[4], s->bca.len);
1851
1852 return 0;
1853}
1854
1855static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1856{
1857 int ret = 0, size;
1858 u_char *buf;
1859 struct packet_command cgc;
1860 struct cdrom_device_ops *cdo = cdi->ops;
1861
1862 size = sizeof(s->manufact.value) + 4;
1863
1864 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL)
1865 return -ENOMEM;
1866
1867 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1868 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1869 cgc.cmd[7] = s->type;
1870 cgc.cmd[8] = size >> 8;
1871 cgc.cmd[9] = size & 0xff;
1872
1873 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1874 kfree(buf);
1875 return ret;
1876 }
1877
1878 s->manufact.len = buf[0] << 8 | buf[1];
1879 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1880 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1881 " (%d)\n", s->manufact.len);
1882 ret = -EIO;
1883 } else {
1884 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1885 }
1886
1887 kfree(buf);
1888 return ret;
1889}
1890
1891static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1892{
1893 switch (s->type) {
1894 case DVD_STRUCT_PHYSICAL:
1895 return dvd_read_physical(cdi, s);
1896
1897 case DVD_STRUCT_COPYRIGHT:
1898 return dvd_read_copyright(cdi, s);
1899
1900 case DVD_STRUCT_DISCKEY:
1901 return dvd_read_disckey(cdi, s);
1902
1903 case DVD_STRUCT_BCA:
1904 return dvd_read_bca(cdi, s);
1905
1906 case DVD_STRUCT_MANUFACT:
1907 return dvd_read_manufact(cdi, s);
1908
1909 default:
1910 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1911 s->type);
1912 return -EINVAL;
1913 }
1914}
1915
1916int cdrom_mode_sense(struct cdrom_device_info *cdi,
1917 struct packet_command *cgc,
1918 int page_code, int page_control)
1919{
1920 struct cdrom_device_ops *cdo = cdi->ops;
1921
1922 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1923
1924 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1925 cgc->cmd[2] = page_code | (page_control << 6);
1926 cgc->cmd[7] = cgc->buflen >> 8;
1927 cgc->cmd[8] = cgc->buflen & 0xff;
1928 cgc->data_direction = CGC_DATA_READ;
1929 return cdo->generic_packet(cdi, cgc);
1930}
1931
1932int cdrom_mode_select(struct cdrom_device_info *cdi,
1933 struct packet_command *cgc)
1934{
1935 struct cdrom_device_ops *cdo = cdi->ops;
1936
1937 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1938 memset(cgc->buffer, 0, 2);
1939 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1940 cgc->cmd[1] = 0x10; /* PF */
1941 cgc->cmd[7] = cgc->buflen >> 8;
1942 cgc->cmd[8] = cgc->buflen & 0xff;
1943 cgc->data_direction = CGC_DATA_WRITE;
1944 return cdo->generic_packet(cdi, cgc);
1945}
1946
1947static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1948 struct cdrom_subchnl *subchnl, int mcn)
1949{
1950 struct cdrom_device_ops *cdo = cdi->ops;
1951 struct packet_command cgc;
1952 char buffer[32];
1953 int ret;
1954
1955 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1956 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1957 cgc.cmd[1] = 2; /* MSF addressing */
1958 cgc.cmd[2] = 0x40; /* request subQ data */
1959 cgc.cmd[3] = mcn ? 2 : 1;
1960 cgc.cmd[8] = 16;
1961
1962 if ((ret = cdo->generic_packet(cdi, &cgc)))
1963 return ret;
1964
1965 subchnl->cdsc_audiostatus = cgc.buffer[1];
1966 subchnl->cdsc_format = CDROM_MSF;
1967 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1968 subchnl->cdsc_trk = cgc.buffer[6];
1969 subchnl->cdsc_ind = cgc.buffer[7];
1970
1971 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1972 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1973 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1974 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1975 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1976 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1977
1978 return 0;
1979}
1980
1981/*
1982 * Specific READ_10 interface
1983 */
1984static int cdrom_read_cd(struct cdrom_device_info *cdi,
1985 struct packet_command *cgc, int lba,
1986 int blocksize, int nblocks)
1987{
1988 struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1991 cgc->cmd[0] = GPCMD_READ_10;
1992 cgc->cmd[2] = (lba >> 24) & 0xff;
1993 cgc->cmd[3] = (lba >> 16) & 0xff;
1994 cgc->cmd[4] = (lba >> 8) & 0xff;
1995 cgc->cmd[5] = lba & 0xff;
1996 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1997 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1998 cgc->cmd[8] = nblocks & 0xff;
1999 cgc->buflen = blocksize * nblocks;
2000 return cdo->generic_packet(cdi, cgc);
2001}
2002
2003/* very generic interface for reading the various types of blocks */
2004static int cdrom_read_block(struct cdrom_device_info *cdi,
2005 struct packet_command *cgc,
2006 int lba, int nblocks, int format, int blksize)
2007{
2008 struct cdrom_device_ops *cdo = cdi->ops;
2009
2010 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2011 cgc->cmd[0] = GPCMD_READ_CD;
2012 /* expected sector size - cdda,mode1,etc. */
2013 cgc->cmd[1] = format << 2;
2014 /* starting address */
2015 cgc->cmd[2] = (lba >> 24) & 0xff;
2016 cgc->cmd[3] = (lba >> 16) & 0xff;
2017 cgc->cmd[4] = (lba >> 8) & 0xff;
2018 cgc->cmd[5] = lba & 0xff;
2019 /* number of blocks */
2020 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2021 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2022 cgc->cmd[8] = nblocks & 0xff;
2023 cgc->buflen = blksize * nblocks;
2024
2025 /* set the header info returned */
2026 switch (blksize) {
2027 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2028 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2029 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2030 default : cgc->cmd[9] = 0x10;
2031 }
2032
2033 return cdo->generic_packet(cdi, cgc);
2034}
2035
2036static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2037 int lba, int nframes)
2038{
2039 struct packet_command cgc;
2040 int ret = 0;
2041 int nr;
2042
2043 cdi->last_sense = 0;
2044
2045 memset(&cgc, 0, sizeof(cgc));
2046
2047 /*
2048 * start with will ra.nframes size, back down if alloc fails
2049 */
2050 nr = nframes;
2051 do {
2052 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2053 if (cgc.buffer)
2054 break;
2055
2056 nr >>= 1;
2057 } while (nr);
2058
2059 if (!nr)
2060 return -ENOMEM;
2061
2062 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2063 ret = -EFAULT;
2064 goto out;
2065 }
2066
2067 cgc.data_direction = CGC_DATA_READ;
2068 while (nframes > 0) {
2069 if (nr > nframes)
2070 nr = nframes;
2071
2072 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2073 if (ret)
2074 break;
2075 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2076 ret = -EFAULT;
2077 break;
2078 }
2079 ubuf += CD_FRAMESIZE_RAW * nr;
2080 nframes -= nr;
2081 lba += nr;
2082 }
2083out:
2084 kfree(cgc.buffer);
2085 return ret;
2086}
2087
2088static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2089 int lba, int nframes)
2090{
2091 request_queue_t *q = cdi->disk->queue;
2092 struct request *rq;
2093 struct bio *bio;
2094 unsigned int len;
2095 int nr, ret = 0;
2096
2097 if (!q)
2098 return -ENXIO;
2099
dd1cab95
JA		 2100 rq = blk_get_request(q, READ, GFP_KERNEL);
2101 if (!rq)
2102 return -ENOMEM;
2103
1da177e4
LT		 2104 cdi->last_sense = 0;
2105
2106 while (nframes) {
2107 nr = nframes;
2108 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2109 nr = 1;
2110 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2111 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2112
2113 len = nr * CD_FRAMESIZE_RAW;
2114
dd1cab95
JA		 2115 ret = blk_rq_map_user(q, rq, ubuf, len);
2116 if (ret)
2117 break;
1da177e4
LT		 2118
2119 memset(rq->cmd, 0, sizeof(rq->cmd));
2120 rq->cmd[0] = GPCMD_READ_CD;
2121 rq->cmd[1] = 1 << 2;
2122 rq->cmd[2] = (lba >> 24) & 0xff;
2123 rq->cmd[3] = (lba >> 16) & 0xff;
2124 rq->cmd[4] = (lba >> 8) & 0xff;
2125 rq->cmd[5] = lba & 0xff;
2126 rq->cmd[6] = (nr >> 16) & 0xff;
2127 rq->cmd[7] = (nr >> 8) & 0xff;
2128 rq->cmd[8] = nr & 0xff;
2129 rq->cmd[9] = 0xf8;
2130
2131 rq->cmd_len = 12;
2132 rq->flags |= REQ_BLOCK_PC;
2133 rq->timeout = 60 * HZ;
2134 bio = rq->bio;
2135
2136 if (rq->bio)
2137 blk_queue_bounce(q, &rq->bio);
2138
994ca9a1 2139 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2140 struct request_sense *s = rq->sense;
2141 ret = -EIO;
2142 cdi->last_sense = s->sense_key;
2143 }
2144
dd1cab95 2145 if (blk_rq_unmap_user(bio, len))
1da177e4
LT		 2146 ret = -EFAULT;
2147
2148 if (ret)
2149 break;
2150
2151 nframes -= nr;
2152 lba += nr;
2153 ubuf += len;
2154 }
2155
dd1cab95 2156 blk_put_request(rq);
1da177e4
LT		 2157 return ret;
2158}
2159
2160static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2161 int lba, int nframes)
2162{
2163 int ret;
2164
2165 if (cdi->cdda_method == CDDA_OLD)
2166 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2167
2168retry:
2169 /*
2170 * for anything else than success and io error, we need to retry
2171 */
2172 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2173 if (!ret || ret != -EIO)
2174 return ret;
2175
2176 /*
2177 * I've seen drives get sense 4/8/3 udma crc errors on multi
2178 * frame dma, so drop to single frame dma if we need to
2179 */
2180 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2181 printk("cdrom: dropping to single frame dma\n");
2182 cdi->cdda_method = CDDA_BPC_SINGLE;
2183 goto retry;
2184 }
2185
2186 /*
2187 * so we have an io error of some sort with multi frame dma. if the
2188 * condition wasn't a hardware error
2189 * problems, not for any error
2190 */
2191 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2192 return ret;
2193
2194 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2195 cdi->cdda_method = CDDA_OLD;
2196 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2197}
2198
d2c5d4fc
CH		 2199static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2200 void __user *argp)
1da177e4 2201{
d2c5d4fc
CH		 2202 struct cdrom_multisession ms_info;
2203 u8 requested_format;
1da177e4
LT		 2204 int ret;
2205
d2c5d4fc
CH		 2206 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2207
2208 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2209 return -ENOSYS;
2210
2211 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2212 return -EFAULT;
2213
2214 requested_format = ms_info.addr_format;
2215 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2216 return -EINVAL;
2217 ms_info.addr_format = CDROM_LBA;
2218
2219 ret = cdi->ops->get_last_session(cdi, &ms_info);
2220 if (ret)
1da177e4
LT		 2221 return ret;
2222
d2c5d4fc
CH		 2223 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2224
2225 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2226 return -EFAULT;
2227
2228 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2229 return 0;
2230}
2231
2232static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2233{
2234 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2235
2236 if (!CDROM_CAN(CDC_OPEN_TRAY))
2237 return -ENOSYS;
2238 if (cdi->use_count != 1 || keeplocked)
2239 return -EBUSY;
2240 if (CDROM_CAN(CDC_LOCK)) {
2241 int ret = cdi->ops->lock_door(cdi, 0);
2242 if (ret)
1da177e4 2243 return ret;
d2c5d4fc 2244 }
1da177e4 2245
d2c5d4fc
CH		 2246 return cdi->ops->tray_move(cdi, 1);
2247}
1da177e4 2248
d2c5d4fc
CH		 2249static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2250{
2251 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2252
d2c5d4fc
CH		 2253 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2254 return -ENOSYS;
2255 return cdi->ops->tray_move(cdi, 0);
2256}
1da177e4 2257
d2c5d4fc
CH		 2258static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2259 unsigned long arg)
2260{
2261 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2262
d2c5d4fc
CH		 2263 if (!CDROM_CAN(CDC_OPEN_TRAY))
2264 return -ENOSYS;
2265 if (keeplocked)
2266 return -EBUSY;
1da177e4 2267
d2c5d4fc
CH		 2268 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2269 if (arg)
2270 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2271 return 0;
2272}
1da177e4 2273
d2c5d4fc
CH		 2274static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2275 unsigned long arg)
2276{
2277 struct cdrom_changer_info *info;
2278 int ret;
1da177e4 2279
d2c5d4fc 2280 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2281
d2c5d4fc
CH		 2282 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2283 return -ENOSYS;
1da177e4 2284
d2c5d4fc
CH		 2285 /* cannot select disc or select current disc */
2286 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2287 return media_changed(cdi, 1);
1da177e4 2288
d2c5d4fc
CH		 2289 if ((unsigned int)arg >= cdi->capacity)
2290 return -EINVAL;
1da177e4 2291
d2c5d4fc
CH		 2292 info = kmalloc(sizeof(*info), GFP_KERNEL);
2293 if (!info)
2294 return -ENOMEM;
1da177e4 2295
d2c5d4fc
CH		 2296 ret = cdrom_read_mech_status(cdi, info);
2297 if (!ret)
2298 ret = info->slots[arg].change;
2299 kfree(info);
2300 return ret;
2301}
1da177e4 2302
d2c5d4fc
CH		 2303static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2304 unsigned long arg)
2305{
2306 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2307
d2c5d4fc
CH		 2308 /*
2309 * Options need to be in sync with capability.
2310 * Too late for that, so we have to check each one separately.
2311 */
2312 switch (arg) {
2313 case CDO_USE_FFLAGS:
2314 case CDO_CHECK_TYPE:
2315 break;
2316 case CDO_LOCK:
2317 if (!CDROM_CAN(CDC_LOCK))
2318 return -ENOSYS;
2319 break;
2320 case 0:
2321 return cdi->options;
2322 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2323 default:
2324 if (!CDROM_CAN(arg))
1da177e4 2325 return -ENOSYS;
d2c5d4fc
CH		 2326 }
2327 cdi->options |= (int) arg;
2328 return cdi->options;
2329}
1da177e4 2330
d2c5d4fc
CH		 2331static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2332 unsigned long arg)
2333{
2334 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2335
d2c5d4fc
CH		 2336 cdi->options &= ~(int) arg;
2337 return cdi->options;
2338}
1da177e4 2339
d2c5d4fc
CH		 2340static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2341 unsigned long arg)
2342{
2343 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2344
d2c5d4fc
CH		 2345 if (!CDROM_CAN(CDC_SELECT_SPEED))
2346 return -ENOSYS;
2347 return cdi->ops->select_speed(cdi, arg);
2348}
1da177e4 2349
d2c5d4fc
CH		 2350static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2351 unsigned long arg)
2352{
2353 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2354
2355 if (!CDROM_CAN(CDC_SELECT_DISC))
2356 return -ENOSYS;
2357
2358 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2359 if ((int)arg >= cdi->capacity)
2360 return -EINVAL;
2361 }
2362
2363 /*
2364 * ->select_disc is a hook to allow a driver-specific way of
2365 * seleting disc. However, since there is no equivalent hook for
2366 * cdrom_slot_status this may not actually be useful...
2367 */
2368 if (cdi->ops->select_disc)
2369 return cdi->ops->select_disc(cdi, arg);
2370
2371 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2372 return cdrom_select_disc(cdi, arg);
2373}
2374
2375static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2376 struct block_device *bdev)
2377{
2378 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2379
2380 if (!capable(CAP_SYS_ADMIN))
2381 return -EACCES;
2382 if (!CDROM_CAN(CDC_RESET))
2383 return -ENOSYS;
2384 invalidate_bdev(bdev, 0);
2385 return cdi->ops->reset(cdi);
2386}
2387
2388static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2389 unsigned long arg)
2390{
2391 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2392
2393 if (!CDROM_CAN(CDC_LOCK))
2394 return -EDRIVE_CANT_DO_THIS;
2395
2396 keeplocked = arg ? 1 : 0;
2397
2398 /*
2399 * Don't unlock the door on multiple opens by default, but allow
2400 * root to do so.
2401 */
2402 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2403 return -EBUSY;
2404 return cdi->ops->lock_door(cdi, arg);
2405}
2406
2407static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2408 unsigned long arg)
2409{
2410 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2411
2412 if (!capable(CAP_SYS_ADMIN))
2413 return -EACCES;
2414 debug = arg ? 1 : 0;
2415 return debug;
2416}
1da177e4 2417
d2c5d4fc
CH		 2418static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2419{
2420 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2421 return (cdi->ops->capability & ~cdi->mask);
2422}
2423
2424/*
2425 * The following function is implemented, although very few audio
1da177e4
LT		 2426 * discs give Universal Product Code information, which should just be
2427 * the Medium Catalog Number on the box. Note, that the way the code
2428 * is written on the CD is /not/ uniform across all discs!
2429 */
d2c5d4fc
CH		 2430static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2431 void __user *argp)
2432{
2433 struct cdrom_mcn mcn;
2434 int ret;
1da177e4 2435
d2c5d4fc 2436 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2437
d2c5d4fc
CH		 2438 if (!(cdi->ops->capability & CDC_MCN))
2439 return -ENOSYS;
2440 ret = cdi->ops->get_mcn(cdi, &mcn);
2441 if (ret)
2442 return ret;
1da177e4 2443
d2c5d4fc
CH		 2444 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2445 return -EFAULT;
2446 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2447 return 0;
2448}
1da177e4 2449
d2c5d4fc
CH		 2450static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2451 unsigned long arg)
2452{
2453 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2454
2455 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2456 return -ENOSYS;
2457 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2458 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2459 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2460 if (((int)arg >= cdi->capacity))
2461 return -EINVAL;
2462 return cdrom_slot_status(cdi, arg);
2463}
2464
2465/*
2466 * Ok, this is where problems start. The current interface for the
2467 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2468 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2469 * is often the case, it is also very common for CDs to have some tracks
2470 * with data, and some tracks with audio. Just because I feel like it,
2471 * I declare the following to be the best way to cope. If the CD has ANY
2472 * data tracks on it, it will be returned as a data CD. If it has any XA
2473 * tracks, I will return it as that. Now I could simplify this interface
2474 * by combining these returns with the above, but this more clearly
2475 * demonstrates the problem with the current interface. Too bad this
2476 * wasn't designed to use bitmasks... -Erik
2477 *
2478 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2479 * User level programmers might feel the ioctl is not very useful.
2480 * ---david
2481 */
2482static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2483{
2484 tracktype tracks;
2485
2486 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2487
2488 cdrom_count_tracks(cdi, &tracks);
2489 if (tracks.error)
2490 return tracks.error;
2491
2492 /* Policy mode on */
2493 if (tracks.audio > 0) {
2494 if (!tracks.data && !tracks.cdi && !tracks.xa)
2495 return CDS_AUDIO;
2496 else
2497 return CDS_MIXED;
1da177e4
LT		 2498 }
2499
d2c5d4fc
CH		 2500 if (tracks.cdi > 0)
2501 return CDS_XA_2_2;
2502 if (tracks.xa > 0)
2503 return CDS_XA_2_1;
2504 if (tracks.data > 0)
2505 return CDS_DATA_1;
2506 /* Policy mode off */
2507
2508 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2509 return CDS_NO_INFO;
2510}
2511
2512static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2513{
2514 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2515 return cdi->capacity;
2516}
2517
2518static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2519 void __user *argp)
2520{
2521 struct cdrom_subchnl q;
2522 u8 requested, back;
2523 int ret;
2524
2525 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2526
2527 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2528 return -ENOSYS;
2529 if (copy_from_user(&q, argp, sizeof(q)))
2530 return -EFAULT;
2531
2532 requested = q.cdsc_format;
2533 if (requested != CDROM_MSF && requested != CDROM_LBA)
2534 return -EINVAL;
2535 q.cdsc_format = CDROM_MSF;
2536
2537 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2538 if (ret)
2539 return ret;
2540
2541 back = q.cdsc_format; /* local copy */
2542 sanitize_format(&q.cdsc_absaddr, &back, requested);
2543 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2544
2545 if (copy_to_user(argp, &q, sizeof(q)))
2546 return -EFAULT;
2547 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2548 return 0;
2549}
2550
2551static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2552 void __user *argp)
2553{
2554 struct cdrom_tochdr header;
2555 int ret;
2556
2557 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2558
2559 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2560 return -ENOSYS;
2561 if (copy_from_user(&header, argp, sizeof(header)))
2562 return -EFAULT;
2563
2564 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2565 if (ret)
2566 return ret;
2567
2568 if (copy_to_user(argp, &header, sizeof(header)))
2569 return -EFAULT;
2570 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2571 return 0;
2572}
2573
2574static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2575 void __user *argp)
2576{
2577 struct cdrom_tocentry entry;
2578 u8 requested_format;
2579 int ret;
2580
2581 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2582
2583 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2584 return -ENOSYS;
2585 if (copy_from_user(&entry, argp, sizeof(entry)))
2586 return -EFAULT;
2587
2588 requested_format = entry.cdte_format;
2589 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2590 return -EINVAL;
2591 /* make interface to low-level uniform */
2592 entry.cdte_format = CDROM_MSF;
2593 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2594 if (ret)
2595 return ret;
2596 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2597
2598 if (copy_to_user(argp, &entry, sizeof(entry)))
2599 return -EFAULT;
2600 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2601 return 0;
2602}
2603
2604static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2605 void __user *argp)
2606{
2607 struct cdrom_msf msf;
2608
2609 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2610
2611 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2612 return -ENOSYS;
2613 if (copy_from_user(&msf, argp, sizeof(msf)))
2614 return -EFAULT;
2615 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2616}
2617
2618static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2619 void __user *argp)
2620{
2621 struct cdrom_ti ti;
2622 int ret;
2623
2624 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2625
2626 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2627 return -ENOSYS;
2628 if (copy_from_user(&ti, argp, sizeof(ti)))
2629 return -EFAULT;
2630
2631 ret = check_for_audio_disc(cdi, cdi->ops);
2632 if (ret)
2633 return ret;
2634 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2635}
2636static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2637 void __user *argp)
2638{
2639 struct cdrom_volctrl volume;
2640
2641 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2642
2643 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2644 return -ENOSYS;
2645 if (copy_from_user(&volume, argp, sizeof(volume)))
2646 return -EFAULT;
2647 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2648}
2649
2650static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2651 void __user *argp)
2652{
2653 struct cdrom_volctrl volume;
2654 int ret;
2655
2656 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2657
2658 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2659 return -ENOSYS;
2660
2661 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2662 if (ret)
2663 return ret;
2664
2665 if (copy_to_user(argp, &volume, sizeof(volume)))
2666 return -EFAULT;
2667 return 0;
2668}
2669
2670static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2671 unsigned int cmd)
2672{
2673 int ret;
2674
2675 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2676
2677 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2678 return -ENOSYS;
2679 ret = check_for_audio_disc(cdi, cdi->ops);
2680 if (ret)
2681 return ret;
2682 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2683}
2684
2685/*
2686 * Just about every imaginable ioctl is supported in the Uniform layer
2687 * these days.
2688 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2689 */
2690int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi,
2691 struct inode *ip, unsigned int cmd, unsigned long arg)
2692{
2693 void __user *argp = (void __user *)arg;
2694 int ret;
2695
2696 /*
2697 * Try the generic SCSI command ioctl's first.
2698 */
2699 ret = scsi_cmd_ioctl(file, ip->i_bdev->bd_disk, cmd, argp);
2700 if (ret != -ENOTTY)
2701 return ret;
2702
2703 switch (cmd) {
2704 case CDROMMULTISESSION:
2705 return cdrom_ioctl_multisession(cdi, argp);
2706 case CDROMEJECT:
2707 return cdrom_ioctl_eject(cdi);
2708 case CDROMCLOSETRAY:
2709 return cdrom_ioctl_closetray(cdi);
2710 case CDROMEJECT_SW:
2711 return cdrom_ioctl_eject_sw(cdi, arg);
2712 case CDROM_MEDIA_CHANGED:
2713 return cdrom_ioctl_media_changed(cdi, arg);
2714 case CDROM_SET_OPTIONS:
2715 return cdrom_ioctl_set_options(cdi, arg);
2716 case CDROM_CLEAR_OPTIONS:
2717 return cdrom_ioctl_clear_options(cdi, arg);
2718 case CDROM_SELECT_SPEED:
2719 return cdrom_ioctl_select_speed(cdi, arg);
2720 case CDROM_SELECT_DISC:
2721 return cdrom_ioctl_select_disc(cdi, arg);
2722 case CDROMRESET:
2723 return cdrom_ioctl_reset(cdi, ip->i_bdev);
2724 case CDROM_LOCKDOOR:
2725 return cdrom_ioctl_lock_door(cdi, arg);
2726 case CDROM_DEBUG:
2727 return cdrom_ioctl_debug(cdi, arg);
2728 case CDROM_GET_CAPABILITY:
2729 return cdrom_ioctl_get_capability(cdi);
2730 case CDROM_GET_MCN:
2731 return cdrom_ioctl_get_mcn(cdi, argp);
2732 case CDROM_DRIVE_STATUS:
2733 return cdrom_ioctl_drive_status(cdi, arg);
2734 case CDROM_DISC_STATUS:
2735 return cdrom_ioctl_disc_status(cdi);
2736 case CDROM_CHANGER_NSLOTS:
2737 return cdrom_ioctl_changer_nslots(cdi);
2738 }
2739
2740 /*
2741 * Use the ioctls that are implemented through the generic_packet()
2742 * interface. this may look at bit funny, but if -ENOTTY is
2743 * returned that particular ioctl is not implemented and we
2744 * let it go through the device specific ones.
2745 */
1da177e4
LT		 2746 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2747 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2748 if (ret != -ENOTTY)
1da177e4 2749 return ret;
1da177e4
LT		 2750 }
2751
d2c5d4fc
CH		 2752 /*
2753 * Note: most of the cdinfo() calls are commented out here,
2754 * because they fill up the sys log when CD players poll
2755 * the drive.
2756 */
1da177e4 2757 switch (cmd) {
d2c5d4fc
CH		 2758 case CDROMSUBCHNL:
2759 return cdrom_ioctl_get_subchnl(cdi, argp);
2760 case CDROMREADTOCHDR:
2761 return cdrom_ioctl_read_tochdr(cdi, argp);
2762 case CDROMREADTOCENTRY:
2763 return cdrom_ioctl_read_tocentry(cdi, argp);
2764 case CDROMPLAYMSF:
2765 return cdrom_ioctl_play_msf(cdi, argp);
2766 case CDROMPLAYTRKIND:
2767 return cdrom_ioctl_play_trkind(cdi, argp);
2768 case CDROMVOLCTRL:
2769 return cdrom_ioctl_volctrl(cdi, argp);
2770 case CDROMVOLREAD:
2771 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2772 case CDROMSTART:
2773 case CDROMSTOP:
2774 case CDROMPAUSE:
d2c5d4fc
CH		 2775 case CDROMRESUME:
2776 return cdrom_ioctl_audioctl(cdi, cmd);
2777 }
1da177e4 2778
1da177e4
LT		 2779 return -ENOSYS;
2780}
2781
2782static inline
2783int msf_to_lba(char m, char s, char f)
2784{
2785 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
2786}
2787
2788/*
2789 * Required when we need to use READ_10 to issue other than 2048 block
2790 * reads
2791 */
2792static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2793{
2794 struct cdrom_device_ops *cdo = cdi->ops;
2795 struct packet_command cgc;
2796 struct modesel_head mh;
2797
2798 memset(&mh, 0, sizeof(mh));
2799 mh.block_desc_length = 0x08;
2800 mh.block_length_med = (size >> 8) & 0xff;
2801 mh.block_length_lo = size & 0xff;
2802
2803 memset(&cgc, 0, sizeof(cgc));
2804 cgc.cmd[0] = 0x15;
2805 cgc.cmd[1] = 1 << 4;
2806 cgc.cmd[4] = 12;
2807 cgc.buflen = sizeof(mh);
2808 cgc.buffer = (char *) &mh;
2809 cgc.data_direction = CGC_DATA_WRITE;
2810 mh.block_desc_length = 0x08;
2811 mh.block_length_med = (size >> 8) & 0xff;
2812 mh.block_length_lo = size & 0xff;
2813
2814 return cdo->generic_packet(cdi, &cgc);
2815}
2816
2817static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2818 unsigned long arg)
2819{
2820 struct cdrom_device_ops *cdo = cdi->ops;
2821 struct packet_command cgc;
2822 struct request_sense sense;
2823 unsigned char buffer[32];
2824 int ret = 0;
2825
2826 memset(&cgc, 0, sizeof(cgc));
2827
2828 /* build a unified command and queue it through
2829 cdo->generic_packet() */
2830 switch (cmd) {
2831 case CDROMREADRAW:
2832 case CDROMREADMODE1:
2833 case CDROMREADMODE2: {
2834 struct cdrom_msf msf;
2835 int blocksize = 0, format = 0, lba;
2836
2837 switch (cmd) {
2838 case CDROMREADRAW:
2839 blocksize = CD_FRAMESIZE_RAW;
2840 break;
2841 case CDROMREADMODE1:
2842 blocksize = CD_FRAMESIZE;
2843 format = 2;
2844 break;
2845 case CDROMREADMODE2:
2846 blocksize = CD_FRAMESIZE_RAW0;
2847 break;
2848 }
2849 IOCTL_IN(arg, struct cdrom_msf, msf);
2850 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2851 /* FIXME: we need upper bound checking, too!! */
2852 if (lba < 0)
2853 return -EINVAL;
2854 cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL);
2855 if (cgc.buffer == NULL)
2856 return -ENOMEM;
2857 memset(&sense, 0, sizeof(sense));
2858 cgc.sense = &sense;
2859 cgc.data_direction = CGC_DATA_READ;
2860 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2861 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2862 /*
2863 * SCSI-II devices are not required to support
2864 * READ_CD, so let's try switching block size
2865 */
2866 /* FIXME: switch back again... */
2867 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2868 kfree(cgc.buffer);
2869 return ret;
2870 }
2871 cgc.sense = NULL;
2872 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2873 ret |= cdrom_switch_blocksize(cdi, blocksize);
2874 }
2875 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2876 ret = -EFAULT;
2877 kfree(cgc.buffer);
2878 return ret;
2879 }
2880 case CDROMREADAUDIO: {
2881 struct cdrom_read_audio ra;
2882 int lba;
2883
2884 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2885
2886 if (ra.addr_format == CDROM_MSF)
2887 lba = msf_to_lba(ra.addr.msf.minute,
2888 ra.addr.msf.second,
2889 ra.addr.msf.frame);
2890 else if (ra.addr_format == CDROM_LBA)
2891 lba = ra.addr.lba;
2892 else
2893 return -EINVAL;
2894
2895 /* FIXME: we need upper bound checking, too!! */
2896 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2897 return -EINVAL;
2898
2899 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2900 }
2901 case CDROMSUBCHNL: {
2902 struct cdrom_subchnl q;
2903 u_char requested, back;
2904 IOCTL_IN(arg, struct cdrom_subchnl, q);
2905 requested = q.cdsc_format;
2906 if (!((requested == CDROM_MSF) ||
2907 (requested == CDROM_LBA)))
2908 return -EINVAL;
2909 q.cdsc_format = CDROM_MSF;
2910 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2911 return ret;
2912 back = q.cdsc_format; /* local copy */
2913 sanitize_format(&q.cdsc_absaddr, &back, requested);
2914 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2915 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2916 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2917 return 0;
2918 }
2919 case CDROMPLAYMSF: {
2920 struct cdrom_msf msf;
2921 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2922 IOCTL_IN(arg, struct cdrom_msf, msf);
2923 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2924 cgc.cmd[3] = msf.cdmsf_min0;
2925 cgc.cmd[4] = msf.cdmsf_sec0;
2926 cgc.cmd[5] = msf.cdmsf_frame0;
2927 cgc.cmd[6] = msf.cdmsf_min1;
2928 cgc.cmd[7] = msf.cdmsf_sec1;
2929 cgc.cmd[8] = msf.cdmsf_frame1;
2930 cgc.data_direction = CGC_DATA_NONE;
2931 return cdo->generic_packet(cdi, &cgc);
2932 }
2933 case CDROMPLAYBLK: {
2934 struct cdrom_blk blk;
2935 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2936 IOCTL_IN(arg, struct cdrom_blk, blk);
2937 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2938 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2939 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2940 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2941 cgc.cmd[5] = blk.from & 0xff;
2942 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2943 cgc.cmd[8] = blk.len & 0xff;
2944 cgc.data_direction = CGC_DATA_NONE;
2945 return cdo->generic_packet(cdi, &cgc);
2946 }
2947 case CDROMVOLCTRL:
2948 case CDROMVOLREAD: {
2949 struct cdrom_volctrl volctrl;
2950 char mask[sizeof(buffer)];
2951 unsigned short offset;
2952
2953 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2954
2955 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2956
2957 cgc.buffer = buffer;
2958 cgc.buflen = 24;
2959 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2960 return ret;
2961
2962 /* originally the code depended on buffer[1] to determine
2963 how much data is available for transfer. buffer[1] is
2964 unfortunately ambigious and the only reliable way seem
2965 to be to simply skip over the block descriptor... */
2966 offset = 8 + be16_to_cpu(*(unsigned short *)(buffer+6));
2967
2968 if (offset + 16 > sizeof(buffer))
2969 return -E2BIG;
2970
2971 if (offset + 16 > cgc.buflen) {
2972 cgc.buflen = offset+16;
2973 ret = cdrom_mode_sense(cdi, &cgc,
2974 GPMODE_AUDIO_CTL_PAGE, 0);
2975 if (ret)
2976 return ret;
2977 }
2978
2979 /* sanity check */
2980 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2981 buffer[offset+1] < 14)
2982 return -EINVAL;
2983
2984 /* now we have the current volume settings. if it was only
2985 a CDROMVOLREAD, return these values */
2986 if (cmd == CDROMVOLREAD) {
2987 volctrl.channel0 = buffer[offset+9];
2988 volctrl.channel1 = buffer[offset+11];
2989 volctrl.channel2 = buffer[offset+13];
2990 volctrl.channel3 = buffer[offset+15];
2991 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2992 return 0;
2993 }
2994
2995 /* get the volume mask */
2996 cgc.buffer = mask;
2997 if ((ret = cdrom_mode_sense(cdi, &cgc,
2998 GPMODE_AUDIO_CTL_PAGE, 1)))
2999 return ret;
3000
3001 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
3002 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
3003 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
3004 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
3005
3006 /* set volume */
3007 cgc.buffer = buffer + offset - 8;
3008 memset(cgc.buffer, 0, 8);
3009 return cdrom_mode_select(cdi, &cgc);
3010 }
3011
3012 case CDROMSTART:
3013 case CDROMSTOP: {
3014 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3015 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
3016 cgc.cmd[1] = 1;
3017 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3018 cgc.data_direction = CGC_DATA_NONE;
3019 return cdo->generic_packet(cdi, &cgc);
3020 }
3021
3022 case CDROMPAUSE:
3023 case CDROMRESUME: {
3024 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3025 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
3026 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3027 cgc.data_direction = CGC_DATA_NONE;
3028 return cdo->generic_packet(cdi, &cgc);
3029 }
3030
3031 case DVD_READ_STRUCT: {
3032 dvd_struct *s;
3033 int size = sizeof(dvd_struct);
3034 if (!CDROM_CAN(CDC_DVD))
3035 return -ENOSYS;
3036 if ((s = (dvd_struct *) kmalloc(size, GFP_KERNEL)) == NULL)
3037 return -ENOMEM;
3038 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3039 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3040 kfree(s);
3041 return -EFAULT;
3042 }
3043 if ((ret = dvd_read_struct(cdi, s))) {
3044 kfree(s);
3045 return ret;
3046 }
3047 if (copy_to_user((dvd_struct __user *)arg, s, size))
3048 ret = -EFAULT;
3049 kfree(s);
3050 return ret;
3051 }
3052
3053 case DVD_AUTH: {
3054 dvd_authinfo ai;
3055 if (!CDROM_CAN(CDC_DVD))
3056 return -ENOSYS;
3057 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3058 IOCTL_IN(arg, dvd_authinfo, ai);
3059 if ((ret = dvd_do_auth (cdi, &ai)))
3060 return ret;
3061 IOCTL_OUT(arg, dvd_authinfo, ai);
3062 return 0;
3063 }
3064
3065 case CDROM_NEXT_WRITABLE: {
3066 long next = 0;
3067 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3068 if ((ret = cdrom_get_next_writable(cdi, &next)))
3069 return ret;
3070 IOCTL_OUT(arg, long, next);
3071 return 0;
3072 }
3073 case CDROM_LAST_WRITTEN: {
3074 long last = 0;
3075 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3076 if ((ret = cdrom_get_last_written(cdi, &last)))
3077 return ret;
3078 IOCTL_OUT(arg, long, last);
3079 return 0;
3080 }
3081 } /* switch */
3082
3083 return -ENOTTY;
3084}
3085
3086static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3087 track_information *ti)
3088{
3089 struct cdrom_device_ops *cdo = cdi->ops;
3090 struct packet_command cgc;
3091 int ret, buflen;
3092
3093 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3094 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3095 cgc.cmd[1] = type & 3;
3096 cgc.cmd[4] = (track & 0xff00) >> 8;
3097 cgc.cmd[5] = track & 0xff;
3098 cgc.cmd[8] = 8;
3099 cgc.quiet = 1;
3100
3101 if ((ret = cdo->generic_packet(cdi, &cgc)))
3102 return ret;
3103
3104 buflen = be16_to_cpu(ti->track_information_length) +
3105 sizeof(ti->track_information_length);
3106
3107 if (buflen > sizeof(track_information))
3108 buflen = sizeof(track_information);
3109
3110 cgc.cmd[8] = cgc.buflen = buflen;
3111 if ((ret = cdo->generic_packet(cdi, &cgc)))
3112 return ret;
3113
3114 /* return actual fill size */
3115 return buflen;
3116}
3117
3118/* requires CD R/RW */
3119static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3120{
3121 struct cdrom_device_ops *cdo = cdi->ops;
3122 struct packet_command cgc;
3123 int ret, buflen;
3124
3125 /* set up command and get the disc info */
3126 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3127 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3128 cgc.cmd[8] = cgc.buflen = 2;
3129 cgc.quiet = 1;
3130
3131 if ((ret = cdo->generic_packet(cdi, &cgc)))
3132 return ret;
3133
3134 /* not all drives have the same disc_info length, so requeue
3135 * packet with the length the drive tells us it can supply
3136 */
3137 buflen = be16_to_cpu(di->disc_information_length) +
3138 sizeof(di->disc_information_length);
3139
3140 if (buflen > sizeof(disc_information))
3141 buflen = sizeof(disc_information);
3142
3143 cgc.cmd[8] = cgc.buflen = buflen;
3144 if ((ret = cdo->generic_packet(cdi, &cgc)))
3145 return ret;
3146
3147 /* return actual fill size */
3148 return buflen;
3149}
3150
3151/* return the last written block on the CD-R media. this is for the udf
3152 file system. */
3153int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3154{
3155 struct cdrom_tocentry toc;
3156 disc_information di;
3157 track_information ti;
3158 __u32 last_track;
3159 int ret = -1, ti_size;
3160
3161 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3162 goto use_toc;
3163
3164 ret = cdrom_get_disc_info(cdi, &di);
3165 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3166 + sizeof(di.last_track_lsb)))
3167 goto use_toc;
3168
3169 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3170 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3171 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3172 if (ti_size < (int)offsetof(typeof(ti), track_start))
3173 goto use_toc;
3174
3175 /* if this track is blank, try the previous. */
3176 if (ti.blank) {
3177 if (last_track==1)
3178 goto use_toc;
3179 last_track--;
3180 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3181 }
3182
3183 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3184 + sizeof(ti.track_size)))
3185 goto use_toc;
3186
3187 /* if last recorded field is valid, return it. */
3188 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3189 + sizeof(ti.last_rec_address))) {
3190 *last_written = be32_to_cpu(ti.last_rec_address);
3191 } else {
3192 /* make it up instead */
3193 *last_written = be32_to_cpu(ti.track_start) +
3194 be32_to_cpu(ti.track_size);
3195 if (ti.free_blocks)
3196 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3197 }
3198 return 0;
3199
3200 /* this is where we end up if the drive either can't do a
3201 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3202 it doesn't give enough information or fails. then we return
3203 the toc contents. */
3204use_toc:
3205 toc.cdte_format = CDROM_MSF;
3206 toc.cdte_track = CDROM_LEADOUT;
3207 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3208 return ret;
3209 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3210 *last_written = toc.cdte_addr.lba;
3211 return 0;
3212}
3213
3214/* return the next writable block. also for udf file system. */
3215static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3216{
3217 disc_information di;
3218 track_information ti;
3219 __u16 last_track;
3220 int ret, ti_size;
3221
3222 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3223 goto use_last_written;
3224
3225 ret = cdrom_get_disc_info(cdi, &di);
3226 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3227 + sizeof(di.last_track_lsb))
3228 goto use_last_written;
3229
3230 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3231 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3232 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3233 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3234 goto use_last_written;
3235
3236 /* if this track is blank, try the previous. */
3237 if (ti.blank) {
3238 if (last_track == 1)
3239 goto use_last_written;
3240 last_track--;
3241 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3242 if (ti_size < 0)
3243 goto use_last_written;
3244 }
3245
3246 /* if next recordable address field is valid, use it. */
3247 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3248 + sizeof(ti.next_writable)) {
3249 *next_writable = be32_to_cpu(ti.next_writable);
3250 return 0;
3251 }
3252
3253use_last_written:
3254 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3255 *next_writable = 0;
3256 return ret;
3257 } else {
3258 *next_writable += 7;
3259 return 0;
3260 }
3261}
3262
3263EXPORT_SYMBOL(cdrom_get_last_written);
3264EXPORT_SYMBOL(register_cdrom);
3265EXPORT_SYMBOL(unregister_cdrom);
3266EXPORT_SYMBOL(cdrom_open);
3267EXPORT_SYMBOL(cdrom_release);
3268EXPORT_SYMBOL(cdrom_ioctl);
3269EXPORT_SYMBOL(cdrom_media_changed);
3270EXPORT_SYMBOL(cdrom_number_of_slots);
3271EXPORT_SYMBOL(cdrom_mode_select);
3272EXPORT_SYMBOL(cdrom_mode_sense);
3273EXPORT_SYMBOL(init_cdrom_command);
3274EXPORT_SYMBOL(cdrom_get_media_event);
3275
3276#ifdef CONFIG_SYSCTL
3277
3278#define CDROM_STR_SIZE 1000
3279
3280static struct cdrom_sysctl_settings {
3281 char info[CDROM_STR_SIZE]; /* general info */
3282 int autoclose; /* close tray upon mount, etc */
3283 int autoeject; /* eject on umount */
3284 int debug; /* turn on debugging messages */
3285 int lock; /* lock the door on device open */
3286 int check; /* check media type */
3287} cdrom_sysctl_settings;
3288
3289static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3290 void __user *buffer, size_t *lenp, loff_t *ppos)
3291{
3292 int pos;
3293 struct cdrom_device_info *cdi;
3294 char *info = cdrom_sysctl_settings.info;
3295
3296 if (!*lenp || (*ppos && !write)) {
3297 *lenp = 0;
3298 return 0;
3299 }
3300
3301 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3302
3303 pos += sprintf(info+pos, "\ndrive name:\t");
3304 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3305 pos += sprintf(info+pos, "\t%s", cdi->name);
3306
3307 pos += sprintf(info+pos, "\ndrive speed:\t");
3308 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3309 pos += sprintf(info+pos, "\t%d", cdi->speed);
3310
3311 pos += sprintf(info+pos, "\ndrive # of slots:");
3312 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3313 pos += sprintf(info+pos, "\t%d", cdi->capacity);
3314
3315 pos += sprintf(info+pos, "\nCan close tray:\t");
3316 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3317 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0);
3318
3319 pos += sprintf(info+pos, "\nCan open tray:\t");
3320 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3321 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0);
3322
3323 pos += sprintf(info+pos, "\nCan lock tray:\t");
3324 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3325 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0);
3326
3327 pos += sprintf(info+pos, "\nCan change speed:");
3328 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3329 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0);
3330
3331 pos += sprintf(info+pos, "\nCan select disk:");
3332 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3333 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0);
3334
3335 pos += sprintf(info+pos, "\nCan read multisession:");
3336 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3337 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0);
3338
3339 pos += sprintf(info+pos, "\nCan read MCN:\t");
3340 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3341 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0);
3342
3343 pos += sprintf(info+pos, "\nReports media changed:");
3344 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3345 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0);
3346
3347 pos += sprintf(info+pos, "\nCan play audio:\t");
3348 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3349 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0);
3350
3351 pos += sprintf(info+pos, "\nCan write CD-R:\t");
3352 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3353 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0);
3354
3355 pos += sprintf(info+pos, "\nCan write CD-RW:");
3356 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3357 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0);
3358
3359 pos += sprintf(info+pos, "\nCan read DVD:\t");
3360 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3361 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0);
3362
3363 pos += sprintf(info+pos, "\nCan write DVD-R:");
3364 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3365 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0);
3366
3367 pos += sprintf(info+pos, "\nCan write DVD-RAM:");
3368 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3369 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0);
3370
3371 pos += sprintf(info+pos, "\nCan read MRW:\t");
3372 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3373 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0);
3374
3375 pos += sprintf(info+pos, "\nCan write MRW:\t");
3376 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3377 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0);
3378
3379 pos += sprintf(info+pos, "\nCan write RAM:\t");
3380 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next)
3381 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0);
3382
3383 strcpy(info+pos,"\n\n");
3384
3385 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3386}
3387
3388/* Unfortunately, per device settings are not implemented through
3389 procfs/sysctl yet. When they are, this will naturally disappear. For now
3390 just update all drives. Later this will become the template on which
3391 new registered drives will be based. */
3392static void cdrom_update_settings(void)
3393{
3394 struct cdrom_device_info *cdi;
3395
3396 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) {
3397 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3398 cdi->options |= CDO_AUTO_CLOSE;
3399 else if (!autoclose)
3400 cdi->options &= ~CDO_AUTO_CLOSE;
3401 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3402 cdi->options |= CDO_AUTO_EJECT;
3403 else if (!autoeject)
3404 cdi->options &= ~CDO_AUTO_EJECT;
3405 if (lockdoor && CDROM_CAN(CDC_LOCK))
3406 cdi->options |= CDO_LOCK;
3407 else if (!lockdoor)
3408 cdi->options &= ~CDO_LOCK;
3409 if (check_media_type)
3410 cdi->options |= CDO_CHECK_TYPE;
3411 else
3412 cdi->options &= ~CDO_CHECK_TYPE;
3413 }
3414}
3415
3416static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3417 void __user *buffer, size_t *lenp, loff_t *ppos)
3418{
3419 int *valp = ctl->data;
3420 int val = *valp;
3421 int ret;
3422
3423 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3424
3425 if (write && *valp != val) {
3426
3427 /* we only care for 1 or 0. */
3428 if (*valp)
3429 *valp = 1;
3430 else
3431 *valp = 0;
3432
3433 switch (ctl->ctl_name) {
3434 case DEV_CDROM_AUTOCLOSE: {
3435 if (valp == &cdrom_sysctl_settings.autoclose)
3436 autoclose = cdrom_sysctl_settings.autoclose;
3437 break;
3438 }
3439 case DEV_CDROM_AUTOEJECT: {
3440 if (valp == &cdrom_sysctl_settings.autoeject)
3441 autoeject = cdrom_sysctl_settings.autoeject;
3442 break;
3443 }
3444 case DEV_CDROM_DEBUG: {
3445 if (valp == &cdrom_sysctl_settings.debug)
3446 debug = cdrom_sysctl_settings.debug;
3447 break;
3448 }
3449 case DEV_CDROM_LOCK: {
3450 if (valp == &cdrom_sysctl_settings.lock)
3451 lockdoor = cdrom_sysctl_settings.lock;
3452 break;
3453 }
3454 case DEV_CDROM_CHECK_MEDIA: {
3455 if (valp == &cdrom_sysctl_settings.check)
3456 check_media_type = cdrom_sysctl_settings.check;
3457 break;
3458 }
3459 }
3460 /* update the option flags according to the changes. we
3461 don't have per device options through sysctl yet,
3462 but we will have and then this will disappear. */
3463 cdrom_update_settings();
3464 }
3465
3466 return ret;
3467}
3468
3469/* Place files in /proc/sys/dev/cdrom */
3470static ctl_table cdrom_table[] = {
3471 {
3472 .ctl_name = DEV_CDROM_INFO,
3473 .procname = "info",
3474 .data = &cdrom_sysctl_settings.info,
3475 .maxlen = CDROM_STR_SIZE,
3476 .mode = 0444,
3477 .proc_handler = &cdrom_sysctl_info,
3478 },
3479 {
3480 .ctl_name = DEV_CDROM_AUTOCLOSE,
3481 .procname = "autoclose",
3482 .data = &cdrom_sysctl_settings.autoclose,
3483 .maxlen = sizeof(int),
3484 .mode = 0644,
3485 .proc_handler = &cdrom_sysctl_handler,
3486 },
3487 {
3488 .ctl_name = DEV_CDROM_AUTOEJECT,
3489 .procname = "autoeject",
3490 .data = &cdrom_sysctl_settings.autoeject,
3491 .maxlen = sizeof(int),
3492 .mode = 0644,
3493 .proc_handler = &cdrom_sysctl_handler,
3494 },
3495 {
3496 .ctl_name = DEV_CDROM_DEBUG,
3497 .procname = "debug",
3498 .data = &cdrom_sysctl_settings.debug,
3499 .maxlen = sizeof(int),
3500 .mode = 0644,
3501 .proc_handler = &cdrom_sysctl_handler,
3502 },
3503 {
3504 .ctl_name = DEV_CDROM_LOCK,
3505 .procname = "lock",
3506 .data = &cdrom_sysctl_settings.lock,
3507 .maxlen = sizeof(int),
3508 .mode = 0644,
3509 .proc_handler = &cdrom_sysctl_handler,
3510 },
3511 {
3512 .ctl_name = DEV_CDROM_CHECK_MEDIA,
3513 .procname = "check_media",
3514 .data = &cdrom_sysctl_settings.check,
3515 .maxlen = sizeof(int),
3516 .mode = 0644,
3517 .proc_handler = &cdrom_sysctl_handler
3518 },
3519 { .ctl_name = 0 }
3520};
3521
3522static ctl_table cdrom_cdrom_table[] = {
3523 {
3524 .ctl_name = DEV_CDROM,
3525 .procname = "cdrom",
3526 .maxlen = 0,
3527 .mode = 0555,
3528 .child = cdrom_table,
3529 },
3530 { .ctl_name = 0 }
3531};
3532
3533/* Make sure that /proc/sys/dev is there */
3534static ctl_table cdrom_root_table[] = {
3535 {
3536 .ctl_name = CTL_DEV,
3537 .procname = "dev",
3538 .maxlen = 0,
3539 .mode = 0555,
3540 .child = cdrom_cdrom_table,
3541 },
3542 { .ctl_name = 0 }
3543};
3544static struct ctl_table_header *cdrom_sysctl_header;
3545
3546static void cdrom_sysctl_register(void)
3547{
3548 static int initialized;
3549
3550 if (initialized == 1)
3551 return;
3552
3553 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table, 1);
3554 if (cdrom_root_table->ctl_name && cdrom_root_table->child->de)
3555 cdrom_root_table->child->de->owner = THIS_MODULE;
3556
3557 /* set the defaults */
3558 cdrom_sysctl_settings.autoclose = autoclose;
3559 cdrom_sysctl_settings.autoeject = autoeject;
3560 cdrom_sysctl_settings.debug = debug;
3561 cdrom_sysctl_settings.lock = lockdoor;
3562 cdrom_sysctl_settings.check = check_media_type;
3563
3564 initialized = 1;
3565}
3566
3567static void cdrom_sysctl_unregister(void)
3568{
3569 if (cdrom_sysctl_header)
3570 unregister_sysctl_table(cdrom_sysctl_header);
3571}
3572
3573#endif /* CONFIG_SYSCTL */
3574
3575static int __init cdrom_init(void)
3576{
3577#ifdef CONFIG_SYSCTL
3578 cdrom_sysctl_register();
3579#endif
3580 return 0;
3581}
3582
3583static void __exit cdrom_exit(void)
3584{
3585 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
3586#ifdef CONFIG_SYSCTL
3587 cdrom_sysctl_unregister();
3588#endif
3589}
3590
3591module_init(cdrom_init);
3592module_exit(cdrom_exit);
3593MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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