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scsi-ioctl: use clock_t <> jiffies
[deliverable/linux.git] / drivers / cdrom / cdrom.c
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f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
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
554988d6 305static DEFINE_MUTEX(cdrom_mutex);
1da177e4
LT		 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
2e11c207
JA		 340/*
341 * Another popular OS uses 7 seconds as the hard timeout for default
342 * commands, so it is a good choice for us as well.
343 */
344#define CDROM_DEF_TIMEOUT (7 * HZ)
345
1da177e4
LT		 346/* Not-exported routines. */
347static int open_for_data(struct cdrom_device_info * cdi);
348static int check_for_audio_disc(struct cdrom_device_info * cdi,
349 struct cdrom_device_ops * cdo);
350static void sanitize_format(union cdrom_addr *addr,
351 u_char * curr, u_char requested);
352static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
353 unsigned long arg);
354
355int cdrom_get_last_written(struct cdrom_device_info *, long *);
356static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
357static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
358
359static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
360
361static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
362
1da177e4 363static void cdrom_sysctl_register(void);
17672cf0 364
7fd097d4 365static LIST_HEAD(cdrom_list);
1da177e4
LT		 366
367static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
368 struct packet_command *cgc)
369{
370 if (cgc->sense) {
371 cgc->sense->sense_key = 0x05;
372 cgc->sense->asc = 0x20;
373 cgc->sense->ascq = 0x00;
374 }
375
376 cgc->stat = -EIO;
377 return -EIO;
378}
379
380/* This macro makes sure we don't have to check on cdrom_device_ops
381 * existence in the run-time routines below. Change_capability is a
382 * hack to have the capability flags defined const, while we can still
383 * change it here without gcc complaining at every line.
384 */
385#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
386
387int register_cdrom(struct cdrom_device_info *cdi)
388{
389 static char banner_printed;
390 struct cdrom_device_ops *cdo = cdi->ops;
391 int *change_capability = (int *)&cdo->capability; /* hack */
392
393 cdinfo(CD_OPEN, "entering register_cdrom\n");
394
395 if (cdo->open == NULL || cdo->release == NULL)
3c3f4e01 396 return -EINVAL;
1da177e4
LT		 397 if (!banner_printed) {
398 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n");
399 banner_printed = 1;
1da177e4 400 cdrom_sysctl_register();
1da177e4
LT		 401 }
402
403 ENSURE(drive_status, CDC_DRIVE_STATUS );
404 ENSURE(media_changed, CDC_MEDIA_CHANGED);
405 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
406 ENSURE(lock_door, CDC_LOCK);
407 ENSURE(select_speed, CDC_SELECT_SPEED);
408 ENSURE(get_last_session, CDC_MULTI_SESSION);
409 ENSURE(get_mcn, CDC_MCN);
410 ENSURE(reset, CDC_RESET);
1da177e4
LT		 411 ENSURE(generic_packet, CDC_GENERIC_PACKET);
412 cdi->mc_flags = 0;
413 cdo->n_minors = 0;
414 cdi->options = CDO_USE_FFLAGS;
415
416 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
417 cdi->options |= (int) CDO_AUTO_CLOSE;
418 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
419 cdi->options |= (int) CDO_AUTO_EJECT;
420 if (lockdoor==1)
421 cdi->options |= (int) CDO_LOCK;
422 if (check_media_type==1)
423 cdi->options |= (int) CDO_CHECK_TYPE;
424
425 if (CDROM_CAN(CDC_MRW_W))
426 cdi->exit = cdrom_mrw_exit;
427
428 if (cdi->disk)
429 cdi->cdda_method = CDDA_BPC_FULL;
430 else
431 cdi->cdda_method = CDDA_OLD;
432
433 if (!cdo->generic_packet)
434 cdo->generic_packet = cdrom_dummy_generic_packet;
435
436 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
554988d6 437 mutex_lock(&cdrom_mutex);
7fd097d4 438 list_add(&cdi->list, &cdrom_list);
554988d6 439 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 440 return 0;
441}
442#undef ENSURE
443
0a0c4114 444void unregister_cdrom(struct cdrom_device_info *cdi)
1da177e4 445{
1da177e4
LT		 446 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
447
554988d6 448 mutex_lock(&cdrom_mutex);
7fd097d4 449 list_del(&cdi->list);
554988d6 450 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 451
452 if (cdi->exit)
453 cdi->exit(cdi);
454
455 cdi->ops->n_minors--;
456 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
1da177e4
LT		 457}
458
459int cdrom_get_media_event(struct cdrom_device_info *cdi,
460 struct media_event_desc *med)
461{
462 struct packet_command cgc;
fce53847
FT		 463 unsigned char buffer[8];
464 struct event_header *eh = (struct event_header *) buffer;
1da177e4 465
fce53847 466 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 467 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
468 cgc.cmd[1] = 1; /* IMMED */
469 cgc.cmd[4] = 1 << 4; /* media event */
fce53847 470 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 471 cgc.quiet = 1;
472
473 if (cdi->ops->generic_packet(cdi, &cgc))
fce53847 474 return 1;
1da177e4
LT		 475
476 if (be16_to_cpu(eh->data_len) < sizeof(*med))
fce53847 477 return 1;
1da177e4
LT		 478
479 if (eh->nea || eh->notification_class != 0x4)
fce53847 480 return 1;
1da177e4 481
fce53847
FT		 482 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
483 return 0;
1da177e4
LT		 484}
485
486/*
487 * the first prototypes used 0x2c as the page code for the mrw mode page,
488 * subsequently this was changed to 0x03. probe the one used by this drive
489 */
490static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
491{
492 struct packet_command cgc;
fce53847 493 char buffer[16];
1da177e4 494
fce53847 495 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 496
497 cgc.timeout = HZ;
498 cgc.quiet = 1;
499
500 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
501 cdi->mrw_mode_page = MRW_MODE_PC;
fce53847 502 return 0;
1da177e4
LT		 503 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
504 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
fce53847 505 return 0;
1da177e4 506 }
fce53847
FT		 507
508 return 1;
1da177e4
LT		 509}
510
511static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
512{
513 struct packet_command cgc;
514 struct mrw_feature_desc *mfd;
fce53847 515 unsigned char buffer[16];
1da177e4
LT		 516 int ret;
517
518 *write = 0;
519
fce53847 520 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 521
522 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
523 cgc.cmd[3] = CDF_MRW;
fce53847 524 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 525 cgc.quiet = 1;
526
527 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 528 return ret;
1da177e4
LT		 529
530 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
fce53847
FT		 531 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
532 return 1;
1da177e4
LT		 533 *write = mfd->write;
534
535 if ((ret = cdrom_mrw_probe_pc(cdi))) {
536 *write = 0;
fce53847 537 return ret;
1da177e4 538 }
fce53847
FT		 539
540 return 0;
1da177e4
LT		 541}
542
543static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
544{
545 struct packet_command cgc;
fce53847 546 unsigned char buffer[12];
1da177e4
LT		 547 int ret;
548
549 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : "");
550
551 /*
552 * FmtData bit set (bit 4), format type is 1
553 */
fce53847 554 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
1da177e4
LT		 555 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
556 cgc.cmd[1] = (1 << 4) | 1;
557
558 cgc.timeout = 5 * 60 * HZ;
559
560 /*
561 * 4 byte format list header, 8 byte format list descriptor
562 */
563 buffer[1] = 1 << 1;
564 buffer[3] = 8;
565
566 /*
567 * nr_blocks field
568 */
569 buffer[4] = 0xff;
570 buffer[5] = 0xff;
571 buffer[6] = 0xff;
572 buffer[7] = 0xff;
573
574 buffer[8] = 0x24 << 2;
575 buffer[11] = cont;
576
577 ret = cdi->ops->generic_packet(cdi, &cgc);
578 if (ret)
579 printk(KERN_INFO "cdrom: bgformat failed\n");
580
581 return ret;
582}
583
584static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
585{
586 struct packet_command cgc;
587
588 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
589 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
590
591 /*
592 * Session = 1, Track = 0
593 */
594 cgc.cmd[1] = !!immed;
595 cgc.cmd[2] = 1 << 1;
596
597 cgc.timeout = 5 * 60 * HZ;
598
599 return cdi->ops->generic_packet(cdi, &cgc);
600}
601
602static int cdrom_flush_cache(struct cdrom_device_info *cdi)
603{
604 struct packet_command cgc;
605
606 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
607 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
608
609 cgc.timeout = 5 * 60 * HZ;
610
611 return cdi->ops->generic_packet(cdi, &cgc);
612}
613
614static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
615{
616 disc_information di;
617 int ret;
618
619 ret = cdrom_get_disc_info(cdi, &di);
620 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
621 return 1;
622
623 ret = 0;
624 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
625 printk(KERN_INFO "cdrom: issuing MRW back ground "
626 "format suspend\n");
627 ret = cdrom_mrw_bgformat_susp(cdi, 0);
628 }
629
7da21a02 630 if (!ret && cdi->media_written)
1da177e4
LT		 631 ret = cdrom_flush_cache(cdi);
632
633 return ret;
634}
635
636static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
637{
638 struct packet_command cgc;
639 struct mode_page_header *mph;
fce53847 640 char buffer[16];
1da177e4
LT		 641 int ret, offset, size;
642
fce53847 643 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4 644
fce53847
FT		 645 cgc.buffer = buffer;
646 cgc.buflen = sizeof(buffer);
1da177e4
LT		 647
648 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
fce53847 649 return ret;
1da177e4
LT		 650
651 mph = (struct mode_page_header *) buffer;
652 offset = be16_to_cpu(mph->desc_length);
653 size = be16_to_cpu(mph->mode_data_length) + 2;
654
655 buffer[offset + 3] = space;
656 cgc.buflen = size;
657
658 if ((ret = cdrom_mode_select(cdi, &cgc)))
fce53847 659 return ret;
1da177e4
LT		 660
661 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]);
fce53847 662 return 0;
1da177e4
LT		 663}
664
665static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
666 struct rwrt_feature_desc *rfd)
667{
668 struct packet_command cgc;
fce53847 669 char buffer[24];
1da177e4
LT		 670 int ret;
671
fce53847 672 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 673
674 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
675 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
fce53847 676 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
1da177e4
LT		 677 cgc.quiet = 1;
678
679 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 680 return ret;
1da177e4
LT		 681
682 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
fce53847 683 return 0;
1da177e4
LT		 684}
685
686static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
687{
688 struct packet_command cgc;
fce53847 689 char buffer[16];
56052d52 690 __be16 *feature_code;
1da177e4
LT		 691 int ret;
692
fce53847 693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
696 cgc.cmd[3] = CDF_HWDM;
fce53847 697 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 701 return ret;
1da177e4 702
56052d52 703 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4 704 if (be16_to_cpu(*feature_code) == CDF_HWDM)
fce53847
FT		 705 return 0;
706
707 return 1;
1da177e4
LT		 708}
709
710
711static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
712{
713 struct rwrt_feature_desc rfd;
714 int ret;
715
716 *write = 0;
717
718 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
719 return ret;
720
721 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
722 *write = 1;
723
724 return 0;
725}
726
727static int cdrom_media_erasable(struct cdrom_device_info *cdi)
728{
729 disc_information di;
730 int ret;
731
732 ret = cdrom_get_disc_info(cdi, &di);
733 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
734 return -1;
735
736 return di.erasable;
737}
738
739/*
740 * FIXME: check RO bit
741 */
742static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
743{
744 int ret = cdrom_media_erasable(cdi);
745
746 /*
747 * allow writable open if media info read worked and media is
748 * erasable, _or_ if it fails since not all drives support it
749 */
750 if (!ret)
751 return 1;
752
753 return 0;
754}
755
756static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
757{
758 disc_information di;
759 int ret;
760
761 /*
762 * always reset to DMA lba space on open
763 */
764 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
765 printk(KERN_ERR "cdrom: failed setting lba address space\n");
766 return 1;
767 }
768
769 ret = cdrom_get_disc_info(cdi, &di);
770 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
771 return 1;
772
773 if (!di.erasable)
774 return 1;
775
776 /*
777 * mrw_status
778 * 0 - not MRW formatted
779 * 1 - MRW bgformat started, but not running or complete
780 * 2 - MRW bgformat in progress
781 * 3 - MRW formatting complete
782 */
783 ret = 0;
784 printk(KERN_INFO "cdrom open: mrw_status '%s'\n",
785 mrw_format_status[di.mrw_status]);
786 if (!di.mrw_status)
787 ret = 1;
788 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
789 mrw_format_restart)
790 ret = cdrom_mrw_bgformat(cdi, 1);
791
792 return ret;
793}
794
795static int mo_open_write(struct cdrom_device_info *cdi)
796{
797 struct packet_command cgc;
fce53847 798 char buffer[255];
1da177e4
LT		 799 int ret;
800
fce53847 801 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
1da177e4
LT		 802 cgc.quiet = 1;
803
804 /*
805 * obtain write protect information as per
806 * drivers/scsi/sd.c:sd_read_write_protect_flag
807 */
808
809 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
810 if (ret)
811 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
812 if (ret) {
813 cgc.buflen = 255;
814 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
815 }
816
817 /* drive gave us no info, let the user go ahead */
fce53847
FT		 818 if (ret)
819 return 0;
1da177e4 820
fce53847 821 return buffer[3] & 0x80;
1da177e4
LT		 822}
823
824static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
825{
826 struct rwrt_feature_desc rfd;
827 int ret;
828
829 if ((ret = cdrom_has_defect_mgt(cdi)))
830 return ret;
831
832 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
833 return ret;
834 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
835 ret = !rfd.curr;
836
837 cdinfo(CD_OPEN, "can open for random write\n");
838 return ret;
839}
840
841static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
842{
843 struct packet_command cgc;
fce53847 844 char buffer[32];
1da177e4
LT		 845 int ret, mmc3_profile;
846
fce53847 847 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 848
849 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
850 cgc.cmd[1] = 0;
851 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
fce53847 852 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
1da177e4
LT		 853 cgc.quiet = 1;
854
855 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
856 mmc3_profile = 0xffff;
857 else
858 mmc3_profile = (buffer[6] << 8) | buffer[7];
859
860 cdi->mmc3_profile = mmc3_profile;
861}
862
863static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
864{
865 switch (cdi->mmc3_profile) {
866 case 0x12: /* DVD-RAM */
867 case 0x1A: /* DVD+RW */
868 return 0;
869 default:
870 return 1;
871 }
872}
873
874/*
875 * returns 0 for ok to open write, non-0 to disallow
876 */
877static int cdrom_open_write(struct cdrom_device_info *cdi)
878{
879 int mrw, mrw_write, ram_write;
880 int ret = 1;
881
882 mrw = 0;
883 if (!cdrom_is_mrw(cdi, &mrw_write))
884 mrw = 1;
885
886 if (CDROM_CAN(CDC_MO_DRIVE))
887 ram_write = 1;
888 else
889 (void) cdrom_is_random_writable(cdi, &ram_write);
890
891 if (mrw)
892 cdi->mask &= ~CDC_MRW;
893 else
894 cdi->mask |= CDC_MRW;
895
896 if (mrw_write)
897 cdi->mask &= ~CDC_MRW_W;
898 else
899 cdi->mask |= CDC_MRW_W;
900
901 if (ram_write)
902 cdi->mask &= ~CDC_RAM;
903 else
904 cdi->mask |= CDC_RAM;
905
906 if (CDROM_CAN(CDC_MRW_W))
907 ret = cdrom_mrw_open_write(cdi);
908 else if (CDROM_CAN(CDC_DVD_RAM))
909 ret = cdrom_dvdram_open_write(cdi);
910 else if (CDROM_CAN(CDC_RAM) &&
911 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
912 ret = cdrom_ram_open_write(cdi);
913 else if (CDROM_CAN(CDC_MO_DRIVE))
914 ret = mo_open_write(cdi);
915 else if (!cdrom_is_dvd_rw(cdi))
916 ret = 0;
917
918 return ret;
919}
920
921static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
922{
923 struct packet_command cgc;
924
925 if (cdi->mmc3_profile != 0x1a) {
926 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
927 return;
928 }
929
930 if (!cdi->media_written) {
931 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
932 return;
933 }
934
935 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n",
936 cdi->name);
937
938 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
939 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
940 cgc.timeout = 30*HZ;
941 cdi->ops->generic_packet(cdi, &cgc);
942
943 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
944 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
945 cgc.timeout = 3000*HZ;
946 cgc.quiet = 1;
947 cdi->ops->generic_packet(cdi, &cgc);
948
949 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
950 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
951 cgc.cmd[2] = 2; /* Close session */
952 cgc.quiet = 1;
953 cgc.timeout = 3000*HZ;
954 cdi->ops->generic_packet(cdi, &cgc);
955
956 cdi->media_written = 0;
957}
958
959static int cdrom_close_write(struct cdrom_device_info *cdi)
960{
961#if 0
962 return cdrom_flush_cache(cdi);
963#else
964 return 0;
965#endif
966}
967
968/* We use the open-option O_NONBLOCK to indicate that the
969 * purpose of opening is only for subsequent ioctl() calls; no device
970 * integrity checks are performed.
971 *
972 * We hope that all cd-player programs will adopt this convention. It
973 * is in their own interest: device control becomes a lot easier
974 * this way.
975 */
bbc1cc97 976int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode)
1da177e4
LT		 977{
978 int ret;
979
980 cdinfo(CD_OPEN, "entering cdrom_open\n");
981
982 /* if this was a O_NONBLOCK open and we should honor the flags,
983 * do a quick open without drive/disc integrity checks. */
984 cdi->use_count++;
bbc1cc97 985 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1da177e4
LT		 986 ret = cdi->ops->open(cdi, 1);
987 } else {
988 ret = open_for_data(cdi);
989 if (ret)
990 goto err;
991 cdrom_mmc3_profile(cdi);
bbc1cc97 992 if (mode & FMODE_WRITE) {
1da177e4
LT		 993 ret = -EROFS;
994 if (cdrom_open_write(cdi))
16070428 995 goto err_release;
1da177e4 996 if (!CDROM_CAN(CDC_RAM))
16070428 997 goto err_release;
1da177e4
LT		 998 ret = 0;
999 cdi->media_written = 0;
1000 }
1001 }
1002
1003 if (ret)
1004 goto err;
1005
1006 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1007 cdi->name, cdi->use_count);
1008 /* Do this on open. Don't wait for mount, because they might
1009 not be mounting, but opening with O_NONBLOCK */
bbc1cc97 1010 check_disk_change(bdev);
1da177e4 1011 return 0;
16070428 1012err_release:
ae3ba4fd
AV		 1013 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1014 cdi->ops->lock_door(cdi, 0);
1015 cdinfo(CD_OPEN, "door unlocked.\n");
1016 }
16070428 1017 cdi->ops->release(cdi);
1da177e4
LT		 1018err:
1019 cdi->use_count--;
1020 return ret;
1021}
1022
1023static
1024int open_for_data(struct cdrom_device_info * cdi)
1025{
1026 int ret;
1027 struct cdrom_device_ops *cdo = cdi->ops;
1028 tracktype tracks;
1029 cdinfo(CD_OPEN, "entering open_for_data\n");
1030 /* Check if the driver can report drive status. If it can, we
1031 can do clever things. If it can't, well, we at least tried! */
1032 if (cdo->drive_status != NULL) {
1033 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1034 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1035 if (ret == CDS_TRAY_OPEN) {
1036 cdinfo(CD_OPEN, "the tray is open...\n");
1037 /* can/may i close it? */
1038 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1039 cdi->options & CDO_AUTO_CLOSE) {
1040 cdinfo(CD_OPEN, "trying to close the tray.\n");
1041 ret=cdo->tray_move(cdi,0);
1042 if (ret) {
1043 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1044 /* Ignore the error from the low
1045 level driver. We don't care why it
1046 couldn't close the tray. We only care
1047 that there is no disc in the drive,
1048 since that is the _REAL_ problem here.*/
1049 ret=-ENOMEDIUM;
1050 goto clean_up_and_return;
1051 }
1052 } else {
1053 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1054 ret=-ENOMEDIUM;
1055 goto clean_up_and_return;
1056 }
1057 /* Ok, the door should be closed now.. Check again */
1058 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1059 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1060 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1061 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1062 ret=-ENOMEDIUM;
1063 goto clean_up_and_return;
1064 }
1065 cdinfo(CD_OPEN, "the tray is now closed.\n");
1066 }
1067 /* the door should be closed now, check for the disc */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if (ret!=CDS_DISC_OK) {
1070 ret = -ENOMEDIUM;
1071 goto clean_up_and_return;
1072 }
1073 }
1074 cdrom_count_tracks(cdi, &tracks);
1075 if (tracks.error == CDS_NO_DISC) {
1076 cdinfo(CD_OPEN, "bummer. no disc.\n");
1077 ret=-ENOMEDIUM;
1078 goto clean_up_and_return;
1079 }
1080 /* CD-Players which don't use O_NONBLOCK, workman
1081 * for example, need bit CDO_CHECK_TYPE cleared! */
1082 if (tracks.data==0) {
1083 if (cdi->options & CDO_CHECK_TYPE) {
1084 /* give people a warning shot, now that CDO_CHECK_TYPE
1085 is the default case! */
1086 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1087 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
ba25f9dc 1088 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1089 ret=-EMEDIUMTYPE;
1090 goto clean_up_and_return;
1091 }
1092 else {
1093 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1094 }
1095 }
1096
1097 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1098
1099 /* all seems well, we can open the device */
1100 ret = cdo->open(cdi, 0); /* open for data */
1101 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1102 /* After all this careful checking, we shouldn't have problems
1103 opening the device, but we don't want the device locked if
1104 this somehow fails... */
1105 if (ret) {
1106 cdinfo(CD_OPEN, "open device failed.\n");
1107 goto clean_up_and_return;
1108 }
1109 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1110 cdo->lock_door(cdi, 1);
1111 cdinfo(CD_OPEN, "door locked.\n");
1112 }
1113 cdinfo(CD_OPEN, "device opened successfully.\n");
1114 return ret;
1115
1116 /* Something failed. Try to unlock the drive, because some drivers
1117 (notably ide-cd) lock the drive after every command. This produced
1118 a nasty bug where after mount failed, the drive would remain locked!
1119 This ensures that the drive gets unlocked after a mount fails. This
1120 is a goto to avoid bloating the driver with redundant code. */
1121clean_up_and_return:
00d6da9b 1122 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1123 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1124 cdo->lock_door(cdi, 0);
1125 cdinfo(CD_OPEN, "door unlocked.\n");
1126 }
1127 return ret;
1128}
1129
1130/* This code is similar to that in open_for_data. The routine is called
1131 whenever an audio play operation is requested.
1132*/
ecb80c6a
AB		 1133static int check_for_audio_disc(struct cdrom_device_info * cdi,
1134 struct cdrom_device_ops * cdo)
1da177e4
LT		 1135{
1136 int ret;
1137 tracktype tracks;
1138 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1139 if (!(cdi->options & CDO_CHECK_TYPE))
1140 return 0;
1141 if (cdo->drive_status != NULL) {
1142 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1143 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1144 if (ret == CDS_TRAY_OPEN) {
1145 cdinfo(CD_OPEN, "the tray is open...\n");
1146 /* can/may i close it? */
1147 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1148 cdi->options & CDO_AUTO_CLOSE) {
1149 cdinfo(CD_OPEN, "trying to close the tray.\n");
1150 ret=cdo->tray_move(cdi,0);
1151 if (ret) {
1152 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1153 /* Ignore the error from the low
1154 level driver. We don't care why it
1155 couldn't close the tray. We only care
1156 that there is no disc in the drive,
1157 since that is the _REAL_ problem here.*/
1158 return -ENOMEDIUM;
1159 }
1160 } else {
1161 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1162 return -ENOMEDIUM;
1163 }
1164 /* Ok, the door should be closed now.. Check again */
1165 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1166 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1167 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1168 return -ENOMEDIUM;
1169 }
1170 if (ret!=CDS_DISC_OK) {
1171 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1172 return -EIO;
1173 }
1174 cdinfo(CD_OPEN, "the tray is now closed.\n");
1175 }
1176 }
1177 cdrom_count_tracks(cdi, &tracks);
1178 if (tracks.error)
1179 return(tracks.error);
1180
1181 if (tracks.audio==0)
1182 return -EMEDIUMTYPE;
1183
1184 return 0;
1185}
1186
bbc1cc97 1187void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1da177e4
LT		 1188{
1189 struct cdrom_device_ops *cdo = cdi->ops;
1190 int opened_for_data;
1191
35841f70 1192 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1193
1194 if (cdi->use_count > 0)
1195 cdi->use_count--;
35841f70
BP		 1196
1197 if (cdi->use_count == 0) {
1da177e4 1198 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1da177e4 1199 cdrom_dvd_rw_close_write(cdi);
35841f70
BP		 1200
1201 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1202 cdinfo(CD_CLOSE, "Unlocking door!\n");
1203 cdo->lock_door(cdi, 0);
1204 }
1da177e4 1205 }
35841f70 1206
1da177e4 1207 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
bbc1cc97 1208 !(mode & FMODE_NDELAY);
1da177e4
LT		 1209
1210 /*
1211 * flush cache on last write release
1212 */
1213 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1214 cdrom_close_write(cdi);
1215
1216 cdo->release(cdi);
1217 if (cdi->use_count == 0) { /* last process that closes dev*/
1218 if (opened_for_data &&
1219 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1220 cdo->tray_move(cdi, 1);
1221 }
1da177e4
LT		 1222}
1223
1224static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1225 struct cdrom_changer_info *buf)
1226{
1227 struct packet_command cgc;
1228 struct cdrom_device_ops *cdo = cdi->ops;
1229 int length;
1230
1231 /*
1232 * Sanyo changer isn't spec compliant (doesn't use regular change
1233 * LOAD_UNLOAD command, and it doesn't implement the mech status
1234 * command below
1235 */
1236 if (cdi->sanyo_slot) {
1237 buf->hdr.nslots = 3;
1238 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1239 for (length = 0; length < 3; length++) {
1240 buf->slots[length].disc_present = 1;
1241 buf->slots[length].change = 0;
1242 }
1243 return 0;
1244 }
1245
1246 length = sizeof(struct cdrom_mechstat_header) +
1247 cdi->capacity * sizeof(struct cdrom_slot);
1248
1249 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1250 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1251 cgc.cmd[8] = (length >> 8) & 0xff;
1252 cgc.cmd[9] = length & 0xff;
1253 return cdo->generic_packet(cdi, &cgc);
1254}
1255
1256static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1257{
1258 struct cdrom_changer_info *info;
1259 int ret;
1260
1261 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1262 if (cdi->sanyo_slot)
1263 return CDS_NO_INFO;
1264
1265 info = kmalloc(sizeof(*info), GFP_KERNEL);
1266 if (!info)
1267 return -ENOMEM;
1268
1269 if ((ret = cdrom_read_mech_status(cdi, info)))
1270 goto out_free;
1271
1272 if (info->slots[slot].disc_present)
1273 ret = CDS_DISC_OK;
1274 else
1275 ret = CDS_NO_DISC;
1276
1277out_free:
1278 kfree(info);
1279 return ret;
1280}
1281
1282/* Return the number of slots for an ATAPI/SCSI cdrom,
1283 * return 1 if not a changer.
1284 */
1285int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1286{
1287 int status;
1288 int nslots = 1;
1289 struct cdrom_changer_info *info;
1290
1291 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1292 /* cdrom_read_mech_status requires a valid value for capacity: */
1293 cdi->capacity = 0;
1294
1295 info = kmalloc(sizeof(*info), GFP_KERNEL);
1296 if (!info)
1297 return -ENOMEM;
1298
1299 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1300 nslots = info->hdr.nslots;
1301
1302 kfree(info);
1303 return nslots;
1304}
1305
1306
1307/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1308static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1309{
1310 struct packet_command cgc;
1311
1312 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1313 if (cdi->sanyo_slot && slot < 0)
1314 return 0;
1315
1316 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1317 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1318 cgc.cmd[4] = 2 + (slot >= 0);
1319 cgc.cmd[8] = slot;
1320 cgc.timeout = 60 * HZ;
1321
1322 /* The Sanyo 3 CD changer uses byte 7 of the
1323 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1324 using the GPCMD_LOAD_UNLOAD opcode. */
1325 if (cdi->sanyo_slot && -1 < slot) {
1326 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1327 cgc.cmd[7] = slot;
1328 cgc.cmd[4] = cgc.cmd[8] = 0;
1329 cdi->sanyo_slot = slot ? slot : 3;
1330 }
1331
1332 return cdi->ops->generic_packet(cdi, &cgc);
1333}
1334
1335static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1336{
1337 struct cdrom_changer_info *info;
1338 int curslot;
1339 int ret;
1340
1341 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1342 if (!CDROM_CAN(CDC_SELECT_DISC))
1343 return -EDRIVE_CANT_DO_THIS;
1344
1345 (void) cdi->ops->media_changed(cdi, slot);
1346
1347 if (slot == CDSL_NONE) {
1348 /* set media changed bits, on both queues */
1349 cdi->mc_flags = 0x3;
1350 return cdrom_load_unload(cdi, -1);
1351 }
1352
1353 info = kmalloc(sizeof(*info), GFP_KERNEL);
1354 if (!info)
1355 return -ENOMEM;
1356
1357 if ((ret = cdrom_read_mech_status(cdi, info))) {
1358 kfree(info);
1359 return ret;
1360 }
1361
1362 curslot = info->hdr.curslot;
1363 kfree(info);
1364
1365 if (cdi->use_count > 1 || keeplocked) {
1366 if (slot == CDSL_CURRENT) {
1367 return curslot;
1368 } else {
1369 return -EBUSY;
1370 }
1371 }
1372
1373 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1374 which is useful if it had been previously unloaded.
1375 Whether it can or not, it returns the current slot.
1376 Similarly, if slot happens to be the current one, we still
1377 try and load it. */
1378 if (slot == CDSL_CURRENT)
1379 slot = curslot;
1380
1381 /* set media changed bits on both queues */
1382 cdi->mc_flags = 0x3;
1383 if ((ret = cdrom_load_unload(cdi, slot)))
1384 return ret;
1385
1386 return slot;
1387}
1388
1389/* We want to make media_changed accessible to the user through an
1390 * ioctl. The main problem now is that we must double-buffer the
1391 * low-level implementation, to assure that the VFS and the user both
1392 * see a medium change once.
1393 */
1394
1395static
1396int media_changed(struct cdrom_device_info *cdi, int queue)
1397{
1398 unsigned int mask = (1 << (queue & 1));
1399 int ret = !!(cdi->mc_flags & mask);
1400
1401 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1402 return ret;
1403 /* changed since last call? */
1404 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) {
1405 cdi->mc_flags = 0x3; /* set bit on both queues */
1406 ret |= 1;
1407 cdi->media_written = 0;
1408 }
1409 cdi->mc_flags &= ~mask; /* clear bit */
1410 return ret;
1411}
1412
1413int cdrom_media_changed(struct cdrom_device_info *cdi)
1414{
1415 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1416 * Returning "0" is always safe (media hasn't been changed). Do that
1417 * if the low-level cdrom driver dosn't support media changed. */
1418 if (cdi == NULL || cdi->ops->media_changed == NULL)
1419 return 0;
1420 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1421 return 0;
1422 return media_changed(cdi, 0);
1423}
1424
1425/* badly broken, I know. Is due for a fixup anytime. */
1426static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1427{
1428 struct cdrom_tochdr header;
1429 struct cdrom_tocentry entry;
1430 int ret, i;
1431 tracks->data=0;
1432 tracks->audio=0;
1433 tracks->cdi=0;
1434 tracks->xa=0;
1435 tracks->error=0;
1436 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1da177e4
LT		 1437 /* Grab the TOC header so we can see how many tracks there are */
1438 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1439 if (ret == -ENOMEDIUM)
1440 tracks->error = CDS_NO_DISC;
1441 else
1442 tracks->error = CDS_NO_INFO;
1443 return;
1444 }
1445 /* check what type of tracks are on this disc */
1446 entry.cdte_format = CDROM_MSF;
1447 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1448 entry.cdte_track = i;
1449 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1450 tracks->error=CDS_NO_INFO;
1451 return;
1452 }
1453 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1454 if (entry.cdte_format == 0x10)
1455 tracks->cdi++;
1456 else if (entry.cdte_format == 0x20)
1457 tracks->xa++;
1458 else
1459 tracks->data++;
1460 } else
1461 tracks->audio++;
1462 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1463 i, entry.cdte_format, entry.cdte_ctrl);
1464 }
1465 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1466 header.cdth_trk1, tracks->audio, tracks->data,
1467 tracks->cdi, tracks->xa);
1468}
1469
1470/* Requests to the low-level drivers will /always/ be done in the
1471 following format convention:
1472
1473 CDROM_LBA: all data-related requests.
1474 CDROM_MSF: all audio-related requests.
1475
1476 However, a low-level implementation is allowed to refuse this
1477 request, and return information in its own favorite format.
1478
1479 It doesn't make sense /at all/ to ask for a play_audio in LBA
1480 format, or ask for multi-session info in MSF format. However, for
1481 backward compatibility these format requests will be satisfied, but
1482 the requests to the low-level drivers will be sanitized in the more
1483 meaningful format indicated above.
1484 */
1485
1486static
1487void sanitize_format(union cdrom_addr *addr,
1488 u_char * curr, u_char requested)
1489{
1490 if (*curr == requested)
1491 return; /* nothing to be done! */
1492 if (requested == CDROM_LBA) {
1493 addr->lba = (int) addr->msf.frame +
1494 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1495 } else { /* CDROM_MSF */
1496 int lba = addr->lba;
1497 addr->msf.frame = lba % 75;
1498 lba /= 75;
1499 lba += 2;
1500 addr->msf.second = lba % 60;
1501 addr->msf.minute = lba / 60;
1502 }
1503 *curr = requested;
1504}
1505
1506void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1507 int type)
1508{
1509 memset(cgc, 0, sizeof(struct packet_command));
1510 if (buf)
1511 memset(buf, 0, len);
1512 cgc->buffer = (char *) buf;
1513 cgc->buflen = len;
1514 cgc->data_direction = type;
2e11c207 1515 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1516}
1517
1518/* DVD handling */
1519
1520#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1521#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1522
1523static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1524{
1525 cgc->cmd[0] = GPCMD_REPORT_KEY;
1526 cgc->cmd[10] = type | (agid << 6);
1527 switch (type) {
1528 case 0: case 8: case 5: {
1529 cgc->buflen = 8;
1530 break;
1531 }
1532 case 1: {
1533 cgc->buflen = 16;
1534 break;
1535 }
1536 case 2: case 4: {
1537 cgc->buflen = 12;
1538 break;
1539 }
1540 }
1541 cgc->cmd[9] = cgc->buflen;
1542 cgc->data_direction = CGC_DATA_READ;
1543}
1544
1545static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1546{
1547 cgc->cmd[0] = GPCMD_SEND_KEY;
1548 cgc->cmd[10] = type | (agid << 6);
1549 switch (type) {
1550 case 1: {
1551 cgc->buflen = 16;
1552 break;
1553 }
1554 case 3: {
1555 cgc->buflen = 12;
1556 break;
1557 }
1558 case 6: {
1559 cgc->buflen = 8;
1560 break;
1561 }
1562 }
1563 cgc->cmd[9] = cgc->buflen;
1564 cgc->data_direction = CGC_DATA_WRITE;
1565}
1566
1567static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1568{
1569 int ret;
fce53847 1570 u_char buf[20];
1da177e4
LT		 1571 struct packet_command cgc;
1572 struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1573 rpc_state_t rpc_state;
1da177e4 1574
fce53847 1575 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1576 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1577
1578 switch (ai->type) {
1579 /* LU data send */
1580 case DVD_LU_SEND_AGID:
1581 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1582 cgc.quiet = 1;
1583 setup_report_key(&cgc, ai->lsa.agid, 0);
1584
1585 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1586 return ret;
1da177e4
LT		 1587
1588 ai->lsa.agid = buf[7] >> 6;
1589 /* Returning data, let host change state */
1590 break;
1591
1592 case DVD_LU_SEND_KEY1:
1593 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1594 setup_report_key(&cgc, ai->lsk.agid, 2);
1595
1596 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1597 return ret;
1da177e4
LT		 1598
1599 copy_key(ai->lsk.key, &buf[4]);
1600 /* Returning data, let host change state */
1601 break;
1602
1603 case DVD_LU_SEND_CHALLENGE:
1604 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1605 setup_report_key(&cgc, ai->lsc.agid, 1);
1606
1607 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1608 return ret;
1da177e4
LT		 1609
1610 copy_chal(ai->lsc.chal, &buf[4]);
1611 /* Returning data, let host change state */
1612 break;
1613
1614 /* Post-auth key */
1615 case DVD_LU_SEND_TITLE_KEY:
1616 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1617 cgc.quiet = 1;
1618 setup_report_key(&cgc, ai->lstk.agid, 4);
1619 cgc.cmd[5] = ai->lstk.lba;
1620 cgc.cmd[4] = ai->lstk.lba >> 8;
1621 cgc.cmd[3] = ai->lstk.lba >> 16;
1622 cgc.cmd[2] = ai->lstk.lba >> 24;
1623
1624 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1625 return ret;
1da177e4
LT		 1626
1627 ai->lstk.cpm = (buf[4] >> 7) & 1;
1628 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1629 ai->lstk.cgms = (buf[4] >> 4) & 3;
1630 copy_key(ai->lstk.title_key, &buf[5]);
1631 /* Returning data, let host change state */
1632 break;
1633
1634 case DVD_LU_SEND_ASF:
1635 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1636 setup_report_key(&cgc, ai->lsasf.agid, 5);
1637
1638 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1639 return ret;
1da177e4
LT		 1640
1641 ai->lsasf.asf = buf[7] & 1;
1642 break;
1643
1644 /* LU data receive (LU changes state) */
1645 case DVD_HOST_SEND_CHALLENGE:
1646 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1647 setup_send_key(&cgc, ai->hsc.agid, 1);
1648 buf[1] = 0xe;
1649 copy_chal(&buf[4], ai->hsc.chal);
1650
1651 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1652 return ret;
1da177e4
LT		 1653
1654 ai->type = DVD_LU_SEND_KEY1;
1655 break;
1656
1657 case DVD_HOST_SEND_KEY2:
1658 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1659 setup_send_key(&cgc, ai->hsk.agid, 3);
1660 buf[1] = 0xa;
1661 copy_key(&buf[4], ai->hsk.key);
1662
1663 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1664 ai->type = DVD_AUTH_FAILURE;
fce53847 1665 return ret;
1da177e4
LT		 1666 }
1667 ai->type = DVD_AUTH_ESTABLISHED;
1668 break;
1669
1670 /* Misc */
1671 case DVD_INVALIDATE_AGID:
1672 cgc.quiet = 1;
1673 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1674 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1676 return ret;
1da177e4
LT		 1677 break;
1678
1679 /* Get region settings */
1680 case DVD_LU_SEND_RPC_STATE:
1681 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1682 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1683 memset(&rpc_state, 0, sizeof(rpc_state_t));
1684 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1685
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1687 return ret;
1da177e4 1688
fce53847
FT		 1689 ai->lrpcs.type = rpc_state.type_code;
1690 ai->lrpcs.vra = rpc_state.vra;
1691 ai->lrpcs.ucca = rpc_state.ucca;
1692 ai->lrpcs.region_mask = rpc_state.region_mask;
1693 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1694 break;
1695
1696 /* Set region settings */
1697 case DVD_HOST_SEND_RPC_STATE:
1698 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1699 setup_send_key(&cgc, 0, 6);
1700 buf[1] = 6;
1701 buf[4] = ai->hrpcs.pdrc;
1702
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1704 return ret;
1da177e4
LT		 1705 break;
1706
1707 default:
1708 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1709 return -ENOTTY;
1da177e4 1710 }
fce53847
FT		 1711
1712 return 0;
1da177e4
LT		 1713}
1714
1715static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s)
1716{
fce53847 1717 unsigned char buf[21], *base;
1da177e4
LT		 1718 struct dvd_layer *layer;
1719 struct packet_command cgc;
1720 struct cdrom_device_ops *cdo = cdi->ops;
1721 int ret, layer_num = s->physical.layer_num;
1722
1723 if (layer_num >= DVD_LAYERS)
1724 return -EINVAL;
1725
fce53847 1726 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1da177e4
LT		 1727 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1728 cgc.cmd[6] = layer_num;
1729 cgc.cmd[7] = s->type;
1730 cgc.cmd[9] = cgc.buflen & 0xff;
1731
1732 /*
1733 * refrain from reporting errors on non-existing layers (mainly)
1734 */
1735 cgc.quiet = 1;
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1738 return ret;
1da177e4
LT		 1739
1740 base = &buf[4];
1741 layer = &s->physical.layer[layer_num];
1742
1743 /*
1744 * place the data... really ugly, but at least we won't have to
1745 * worry about endianess in userspace.
1746 */
1747 memset(layer, 0, sizeof(*layer));
1748 layer->book_version = base[0] & 0xf;
1749 layer->book_type = base[0] >> 4;
1750 layer->min_rate = base[1] & 0xf;
1751 layer->disc_size = base[1] >> 4;
1752 layer->layer_type = base[2] & 0xf;
1753 layer->track_path = (base[2] >> 4) & 1;
1754 layer->nlayers = (base[2] >> 5) & 3;
1755 layer->track_density = base[3] & 0xf;
1756 layer->linear_density = base[3] >> 4;
1757 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1758 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1759 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1760 layer->bca = base[16] >> 7;
1761
fce53847 1762 return 0;
1da177e4
LT		 1763}
1764
1765static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s)
1766{
1767 int ret;
fce53847 1768 u_char buf[8];
1da177e4
LT		 1769 struct packet_command cgc;
1770 struct cdrom_device_ops *cdo = cdi->ops;
1771
fce53847 1772 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1da177e4
LT		 1773 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1774 cgc.cmd[6] = s->copyright.layer_num;
1775 cgc.cmd[7] = s->type;
1776 cgc.cmd[8] = cgc.buflen >> 8;
1777 cgc.cmd[9] = cgc.buflen & 0xff;
1778
1779 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1780 return ret;
1da177e4
LT		 1781
1782 s->copyright.cpst = buf[4];
1783 s->copyright.rmi = buf[5];
1784
fce53847 1785 return 0;
1da177e4
LT		 1786}
1787
1788static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s)
1789{
1790 int ret, size;
1791 u_char *buf;
1792 struct packet_command cgc;
1793 struct cdrom_device_ops *cdo = cdi->ops;
1794
1795 size = sizeof(s->disckey.value) + 4;
1796
5cbded58 1797 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1798 return -ENOMEM;
1799
1800 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1801 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc.cmd[7] = s->type;
1803 cgc.cmd[8] = size >> 8;
1804 cgc.cmd[9] = size & 0xff;
1805 cgc.cmd[10] = s->disckey.agid << 6;
1806
1807 if (!(ret = cdo->generic_packet(cdi, &cgc)))
1808 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1809
1810 kfree(buf);
1811 return ret;
1812}
1813
1814static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s)
1815{
1816 int ret;
fce53847 1817 u_char buf[4 + 188];
1da177e4
LT		 1818 struct packet_command cgc;
1819 struct cdrom_device_ops *cdo = cdi->ops;
1820
fce53847 1821 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ);
1da177e4
LT		 1822 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1823 cgc.cmd[7] = s->type;
454d6fbc 1824 cgc.cmd[9] = cgc.buflen & 0xff;
1da177e4
LT		 1825
1826 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1827 return ret;
1da177e4
LT		 1828
1829 s->bca.len = buf[0] << 8 | buf[1];
1830 if (s->bca.len < 12 || s->bca.len > 188) {
1831 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
fce53847 1832 return -EIO;
1da177e4
LT		 1833 }
1834 memcpy(s->bca.value, &buf[4], s->bca.len);
fce53847
FT		 1835
1836 return 0;
1da177e4
LT		 1837}
1838
1839static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s)
1840{
1841 int ret = 0, size;
1842 u_char *buf;
1843 struct packet_command cgc;
1844 struct cdrom_device_ops *cdo = cdi->ops;
1845
1846 size = sizeof(s->manufact.value) + 4;
1847
5cbded58 1848 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 1849 return -ENOMEM;
1850
1851 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ);
1852 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1853 cgc.cmd[7] = s->type;
1854 cgc.cmd[8] = size >> 8;
1855 cgc.cmd[9] = size & 0xff;
1856
1857 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1858 kfree(buf);
1859 return ret;
1860 }
1861
1862 s->manufact.len = buf[0] << 8 | buf[1];
1863 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1864 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1865 " (%d)\n", s->manufact.len);
1866 ret = -EIO;
1867 } else {
1868 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1869 }
1870
1871 kfree(buf);
1872 return ret;
1873}
1874
1875static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s)
1876{
1877 switch (s->type) {
1878 case DVD_STRUCT_PHYSICAL:
1879 return dvd_read_physical(cdi, s);
1880
1881 case DVD_STRUCT_COPYRIGHT:
1882 return dvd_read_copyright(cdi, s);
1883
1884 case DVD_STRUCT_DISCKEY:
1885 return dvd_read_disckey(cdi, s);
1886
1887 case DVD_STRUCT_BCA:
1888 return dvd_read_bca(cdi, s);
1889
1890 case DVD_STRUCT_MANUFACT:
1891 return dvd_read_manufact(cdi, s);
1892
1893 default:
1894 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1895 s->type);
1896 return -EINVAL;
1897 }
1898}
1899
1900int cdrom_mode_sense(struct cdrom_device_info *cdi,
1901 struct packet_command *cgc,
1902 int page_code, int page_control)
1903{
1904 struct cdrom_device_ops *cdo = cdi->ops;
1905
1906 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1907
1908 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1909 cgc->cmd[2] = page_code | (page_control << 6);
1910 cgc->cmd[7] = cgc->buflen >> 8;
1911 cgc->cmd[8] = cgc->buflen & 0xff;
1912 cgc->data_direction = CGC_DATA_READ;
1913 return cdo->generic_packet(cdi, cgc);
1914}
1915
1916int cdrom_mode_select(struct cdrom_device_info *cdi,
1917 struct packet_command *cgc)
1918{
1919 struct cdrom_device_ops *cdo = cdi->ops;
1920
1921 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1922 memset(cgc->buffer, 0, 2);
1923 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1924 cgc->cmd[1] = 0x10; /* PF */
1925 cgc->cmd[7] = cgc->buflen >> 8;
1926 cgc->cmd[8] = cgc->buflen & 0xff;
1927 cgc->data_direction = CGC_DATA_WRITE;
1928 return cdo->generic_packet(cdi, cgc);
1929}
1930
1931static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
1932 struct cdrom_subchnl *subchnl, int mcn)
1933{
1934 struct cdrom_device_ops *cdo = cdi->ops;
1935 struct packet_command cgc;
fce53847 1936 char buffer[32];
1da177e4
LT		 1937 int ret;
1938
1939 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
1940 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
1941 cgc.cmd[1] = 2; /* MSF addressing */
1942 cgc.cmd[2] = 0x40; /* request subQ data */
1943 cgc.cmd[3] = mcn ? 2 : 1;
1944 cgc.cmd[8] = 16;
1945
1946 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1947 return ret;
1da177e4
LT		 1948
1949 subchnl->cdsc_audiostatus = cgc.buffer[1];
1950 subchnl->cdsc_format = CDROM_MSF;
1951 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
1952 subchnl->cdsc_trk = cgc.buffer[6];
1953 subchnl->cdsc_ind = cgc.buffer[7];
1954
1955 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
1956 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
1957 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
1958 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
1959 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
1960 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
1961
fce53847 1962 return 0;
1da177e4
LT		 1963}
1964
1965/*
1966 * Specific READ_10 interface
1967 */
1968static int cdrom_read_cd(struct cdrom_device_info *cdi,
1969 struct packet_command *cgc, int lba,
1970 int blocksize, int nblocks)
1971{
1972 struct cdrom_device_ops *cdo = cdi->ops;
1973
1974 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1975 cgc->cmd[0] = GPCMD_READ_10;
1976 cgc->cmd[2] = (lba >> 24) & 0xff;
1977 cgc->cmd[3] = (lba >> 16) & 0xff;
1978 cgc->cmd[4] = (lba >> 8) & 0xff;
1979 cgc->cmd[5] = lba & 0xff;
1980 cgc->cmd[6] = (nblocks >> 16) & 0xff;
1981 cgc->cmd[7] = (nblocks >> 8) & 0xff;
1982 cgc->cmd[8] = nblocks & 0xff;
1983 cgc->buflen = blocksize * nblocks;
1984 return cdo->generic_packet(cdi, cgc);
1985}
1986
1987/* very generic interface for reading the various types of blocks */
1988static int cdrom_read_block(struct cdrom_device_info *cdi,
1989 struct packet_command *cgc,
1990 int lba, int nblocks, int format, int blksize)
1991{
1992 struct cdrom_device_ops *cdo = cdi->ops;
1993
1994 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
1995 cgc->cmd[0] = GPCMD_READ_CD;
1996 /* expected sector size - cdda,mode1,etc. */
1997 cgc->cmd[1] = format << 2;
1998 /* starting address */
1999 cgc->cmd[2] = (lba >> 24) & 0xff;
2000 cgc->cmd[3] = (lba >> 16) & 0xff;
2001 cgc->cmd[4] = (lba >> 8) & 0xff;
2002 cgc->cmd[5] = lba & 0xff;
2003 /* number of blocks */
2004 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2005 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2006 cgc->cmd[8] = nblocks & 0xff;
2007 cgc->buflen = blksize * nblocks;
2008
2009 /* set the header info returned */
2010 switch (blksize) {
2011 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2012 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2013 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2014 default : cgc->cmd[9] = 0x10;
2015 }
2016
2017 return cdo->generic_packet(cdi, cgc);
2018}
2019
2020static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2021 int lba, int nframes)
2022{
2023 struct packet_command cgc;
2024 int ret = 0;
2025 int nr;
2026
2027 cdi->last_sense = 0;
2028
2029 memset(&cgc, 0, sizeof(cgc));
2030
2031 /*
2032 * start with will ra.nframes size, back down if alloc fails
2033 */
2034 nr = nframes;
2035 do {
2036 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2037 if (cgc.buffer)
2038 break;
2039
2040 nr >>= 1;
2041 } while (nr);
2042
2043 if (!nr)
2044 return -ENOMEM;
2045
2046 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2047 ret = -EFAULT;
2048 goto out;
2049 }
2050
2051 cgc.data_direction = CGC_DATA_READ;
2052 while (nframes > 0) {
2053 if (nr > nframes)
2054 nr = nframes;
2055
2056 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2057 if (ret)
2058 break;
2059 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2060 ret = -EFAULT;
2061 break;
2062 }
2063 ubuf += CD_FRAMESIZE_RAW * nr;
2064 nframes -= nr;
2065 lba += nr;
2066 }
2067out:
2068 kfree(cgc.buffer);
2069 return ret;
2070}
2071
2072static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2073 int lba, int nframes)
2074{
165125e1 2075 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2076 struct request *rq;
2077 struct bio *bio;
2078 unsigned int len;
2079 int nr, ret = 0;
2080
2081 if (!q)
2082 return -ENXIO;
2083
2084 cdi->last_sense = 0;
2085
2086 while (nframes) {
2087 nr = nframes;
2088 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2089 nr = 1;
2090 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9))
2091 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW;
2092
2093 len = nr * CD_FRAMESIZE_RAW;
2094
febd7a5c
AB		 2095 rq = blk_get_request(q, READ, GFP_KERNEL);
2096 if (!rq) {
2097 ret = -ENOMEM;
2098 break;
2099 }
2100
152e283f 2101 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2102 if (ret) {
2103 blk_put_request(rq);
dd1cab95 2104 break;
febd7a5c 2105 }
1da177e4 2106
1da177e4
LT		 2107 rq->cmd[0] = GPCMD_READ_CD;
2108 rq->cmd[1] = 1 << 2;
2109 rq->cmd[2] = (lba >> 24) & 0xff;
2110 rq->cmd[3] = (lba >> 16) & 0xff;
2111 rq->cmd[4] = (lba >> 8) & 0xff;
2112 rq->cmd[5] = lba & 0xff;
2113 rq->cmd[6] = (nr >> 16) & 0xff;
2114 rq->cmd[7] = (nr >> 8) & 0xff;
2115 rq->cmd[8] = nr & 0xff;
2116 rq->cmd[9] = 0xf8;
2117
2118 rq->cmd_len = 12;
4aff5e23 2119 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2120 rq->timeout = 60 * HZ;
2121 bio = rq->bio;
2122
994ca9a1 2123 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2124 struct request_sense *s = rq->sense;
2125 ret = -EIO;
2126 cdi->last_sense = s->sense_key;
2127 }
2128
8e5cfc45 2129 if (blk_rq_unmap_user(bio))
1da177e4 2130 ret = -EFAULT;
febd7a5c 2131 blk_put_request(rq);
1da177e4
LT		 2132
2133 if (ret)
2134 break;
2135
2136 nframes -= nr;
2137 lba += nr;
2138 ubuf += len;
2139 }
2140
2141 return ret;
2142}
2143
2144static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2145 int lba, int nframes)
2146{
2147 int ret;
2148
2149 if (cdi->cdda_method == CDDA_OLD)
2150 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2151
2152retry:
2153 /*
2154 * for anything else than success and io error, we need to retry
2155 */
2156 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2157 if (!ret || ret != -EIO)
2158 return ret;
2159
2160 /*
2161 * I've seen drives get sense 4/8/3 udma crc errors on multi
2162 * frame dma, so drop to single frame dma if we need to
2163 */
2164 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2165 printk("cdrom: dropping to single frame dma\n");
2166 cdi->cdda_method = CDDA_BPC_SINGLE;
2167 goto retry;
2168 }
2169
2170 /*
2171 * so we have an io error of some sort with multi frame dma. if the
2172 * condition wasn't a hardware error
2173 * problems, not for any error
2174 */
2175 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2176 return ret;
2177
2178 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2179 cdi->cdda_method = CDDA_OLD;
2180 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2181}
2182
d2c5d4fc
CH		 2183static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2184 void __user *argp)
1da177e4 2185{
d2c5d4fc
CH		 2186 struct cdrom_multisession ms_info;
2187 u8 requested_format;
1da177e4
LT		 2188 int ret;
2189
d2c5d4fc
CH		 2190 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2191
2192 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2193 return -ENOSYS;
2194
2195 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2196 return -EFAULT;
2197
2198 requested_format = ms_info.addr_format;
2199 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2200 return -EINVAL;
2201 ms_info.addr_format = CDROM_LBA;
2202
2203 ret = cdi->ops->get_last_session(cdi, &ms_info);
2204 if (ret)
1da177e4
LT		 2205 return ret;
2206
d2c5d4fc
CH		 2207 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2208
2209 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2210 return -EFAULT;
2211
2212 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2213 return 0;
2214}
2215
2216static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2217{
2218 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2219
2220 if (!CDROM_CAN(CDC_OPEN_TRAY))
2221 return -ENOSYS;
2222 if (cdi->use_count != 1 || keeplocked)
2223 return -EBUSY;
2224 if (CDROM_CAN(CDC_LOCK)) {
2225 int ret = cdi->ops->lock_door(cdi, 0);
2226 if (ret)
1da177e4 2227 return ret;
d2c5d4fc 2228 }
1da177e4 2229
d2c5d4fc
CH		 2230 return cdi->ops->tray_move(cdi, 1);
2231}
1da177e4 2232
d2c5d4fc
CH		 2233static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2234{
2235 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2236
d2c5d4fc
CH		 2237 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2238 return -ENOSYS;
2239 return cdi->ops->tray_move(cdi, 0);
2240}
1da177e4 2241
d2c5d4fc
CH		 2242static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2243 unsigned long arg)
2244{
2245 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2246
d2c5d4fc
CH		 2247 if (!CDROM_CAN(CDC_OPEN_TRAY))
2248 return -ENOSYS;
2249 if (keeplocked)
2250 return -EBUSY;
1da177e4 2251
d2c5d4fc
CH		 2252 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2253 if (arg)
2254 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2255 return 0;
2256}
1da177e4 2257
d2c5d4fc
CH		 2258static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2259 unsigned long arg)
2260{
2261 struct cdrom_changer_info *info;
2262 int ret;
1da177e4 2263
d2c5d4fc 2264 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2265
d2c5d4fc
CH		 2266 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2267 return -ENOSYS;
1da177e4 2268
d2c5d4fc
CH		 2269 /* cannot select disc or select current disc */
2270 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2271 return media_changed(cdi, 1);
1da177e4 2272
d2c5d4fc
CH		 2273 if ((unsigned int)arg >= cdi->capacity)
2274 return -EINVAL;
1da177e4 2275
d2c5d4fc
CH		 2276 info = kmalloc(sizeof(*info), GFP_KERNEL);
2277 if (!info)
2278 return -ENOMEM;
1da177e4 2279
d2c5d4fc
CH		 2280 ret = cdrom_read_mech_status(cdi, info);
2281 if (!ret)
2282 ret = info->slots[arg].change;
2283 kfree(info);
2284 return ret;
2285}
1da177e4 2286
d2c5d4fc
CH		 2287static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2288 unsigned long arg)
2289{
2290 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2291
d2c5d4fc
CH		 2292 /*
2293 * Options need to be in sync with capability.
2294 * Too late for that, so we have to check each one separately.
2295 */
2296 switch (arg) {
2297 case CDO_USE_FFLAGS:
2298 case CDO_CHECK_TYPE:
2299 break;
2300 case CDO_LOCK:
2301 if (!CDROM_CAN(CDC_LOCK))
2302 return -ENOSYS;
2303 break;
2304 case 0:
2305 return cdi->options;
2306 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2307 default:
2308 if (!CDROM_CAN(arg))
1da177e4 2309 return -ENOSYS;
d2c5d4fc
CH		 2310 }
2311 cdi->options |= (int) arg;
2312 return cdi->options;
2313}
1da177e4 2314
d2c5d4fc
CH		 2315static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2316 unsigned long arg)
2317{
2318 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2319
d2c5d4fc
CH		 2320 cdi->options &= ~(int) arg;
2321 return cdi->options;
2322}
1da177e4 2323
d2c5d4fc
CH		 2324static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2325 unsigned long arg)
2326{
2327 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2328
d2c5d4fc
CH		 2329 if (!CDROM_CAN(CDC_SELECT_SPEED))
2330 return -ENOSYS;
2331 return cdi->ops->select_speed(cdi, arg);
2332}
1da177e4 2333
d2c5d4fc
CH		 2334static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2335 unsigned long arg)
2336{
2337 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2338
2339 if (!CDROM_CAN(CDC_SELECT_DISC))
2340 return -ENOSYS;
2341
2342 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2343 if ((int)arg >= cdi->capacity)
2344 return -EINVAL;
2345 }
2346
2347 /*
2348 * ->select_disc is a hook to allow a driver-specific way of
2349 * seleting disc. However, since there is no equivalent hook for
2350 * cdrom_slot_status this may not actually be useful...
2351 */
2352 if (cdi->ops->select_disc)
2353 return cdi->ops->select_disc(cdi, arg);
2354
2355 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2356 return cdrom_select_disc(cdi, arg);
2357}
2358
2359static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2360 struct block_device *bdev)
2361{
2362 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2363
2364 if (!capable(CAP_SYS_ADMIN))
2365 return -EACCES;
2366 if (!CDROM_CAN(CDC_RESET))
2367 return -ENOSYS;
f98393a6 2368 invalidate_bdev(bdev);
d2c5d4fc
CH		 2369 return cdi->ops->reset(cdi);
2370}
2371
2372static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2373 unsigned long arg)
2374{
2375 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2376
2377 if (!CDROM_CAN(CDC_LOCK))
2378 return -EDRIVE_CANT_DO_THIS;
2379
2380 keeplocked = arg ? 1 : 0;
2381
2382 /*
2383 * Don't unlock the door on multiple opens by default, but allow
2384 * root to do so.
2385 */
2386 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2387 return -EBUSY;
2388 return cdi->ops->lock_door(cdi, arg);
2389}
2390
2391static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2392 unsigned long arg)
2393{
2394 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2395
2396 if (!capable(CAP_SYS_ADMIN))
2397 return -EACCES;
2398 debug = arg ? 1 : 0;
2399 return debug;
2400}
1da177e4 2401
d2c5d4fc
CH		 2402static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2403{
2404 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2405 return (cdi->ops->capability & ~cdi->mask);
2406}
2407
2408/*
2409 * The following function is implemented, although very few audio
1da177e4
LT		 2410 * discs give Universal Product Code information, which should just be
2411 * the Medium Catalog Number on the box. Note, that the way the code
2412 * is written on the CD is /not/ uniform across all discs!
2413 */
d2c5d4fc
CH		 2414static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2415 void __user *argp)
2416{
2417 struct cdrom_mcn mcn;
2418 int ret;
1da177e4 2419
d2c5d4fc 2420 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2421
d2c5d4fc
CH		 2422 if (!(cdi->ops->capability & CDC_MCN))
2423 return -ENOSYS;
2424 ret = cdi->ops->get_mcn(cdi, &mcn);
2425 if (ret)
2426 return ret;
1da177e4 2427
d2c5d4fc
CH		 2428 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2429 return -EFAULT;
2430 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2431 return 0;
2432}
1da177e4 2433
d2c5d4fc
CH		 2434static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2435 unsigned long arg)
2436{
2437 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2438
2439 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2440 return -ENOSYS;
2441 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2442 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2443 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2444 if (((int)arg >= cdi->capacity))
2445 return -EINVAL;
2446 return cdrom_slot_status(cdi, arg);
2447}
2448
2449/*
2450 * Ok, this is where problems start. The current interface for the
2451 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2452 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2453 * is often the case, it is also very common for CDs to have some tracks
2454 * with data, and some tracks with audio. Just because I feel like it,
2455 * I declare the following to be the best way to cope. If the CD has ANY
2456 * data tracks on it, it will be returned as a data CD. If it has any XA
2457 * tracks, I will return it as that. Now I could simplify this interface
2458 * by combining these returns with the above, but this more clearly
2459 * demonstrates the problem with the current interface. Too bad this
2460 * wasn't designed to use bitmasks... -Erik
2461 *
2462 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2463 * User level programmers might feel the ioctl is not very useful.
2464 * ---david
2465 */
2466static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2467{
2468 tracktype tracks;
2469
2470 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2471
2472 cdrom_count_tracks(cdi, &tracks);
2473 if (tracks.error)
2474 return tracks.error;
2475
2476 /* Policy mode on */
2477 if (tracks.audio > 0) {
2478 if (!tracks.data && !tracks.cdi && !tracks.xa)
2479 return CDS_AUDIO;
2480 else
2481 return CDS_MIXED;
1da177e4
LT		 2482 }
2483
d2c5d4fc
CH		 2484 if (tracks.cdi > 0)
2485 return CDS_XA_2_2;
2486 if (tracks.xa > 0)
2487 return CDS_XA_2_1;
2488 if (tracks.data > 0)
2489 return CDS_DATA_1;
2490 /* Policy mode off */
2491
2492 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2493 return CDS_NO_INFO;
2494}
2495
2496static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2497{
2498 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2499 return cdi->capacity;
2500}
2501
2502static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2503 void __user *argp)
2504{
2505 struct cdrom_subchnl q;
2506 u8 requested, back;
2507 int ret;
2508
2509 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2510
d2c5d4fc
CH		 2511 if (copy_from_user(&q, argp, sizeof(q)))
2512 return -EFAULT;
2513
2514 requested = q.cdsc_format;
2515 if (requested != CDROM_MSF && requested != CDROM_LBA)
2516 return -EINVAL;
2517 q.cdsc_format = CDROM_MSF;
2518
2519 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2520 if (ret)
2521 return ret;
2522
2523 back = q.cdsc_format; /* local copy */
2524 sanitize_format(&q.cdsc_absaddr, &back, requested);
2525 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2526
2527 if (copy_to_user(argp, &q, sizeof(q)))
2528 return -EFAULT;
2529 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2530 return 0;
2531}
2532
2533static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2534 void __user *argp)
2535{
2536 struct cdrom_tochdr header;
2537 int ret;
2538
2539 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2540
d2c5d4fc
CH		 2541 if (copy_from_user(&header, argp, sizeof(header)))
2542 return -EFAULT;
2543
2544 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2545 if (ret)
2546 return ret;
2547
2548 if (copy_to_user(argp, &header, sizeof(header)))
2549 return -EFAULT;
2550 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2551 return 0;
2552}
2553
2554static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2555 void __user *argp)
2556{
2557 struct cdrom_tocentry entry;
2558 u8 requested_format;
2559 int ret;
2560
2561 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2562
d2c5d4fc
CH		 2563 if (copy_from_user(&entry, argp, sizeof(entry)))
2564 return -EFAULT;
2565
2566 requested_format = entry.cdte_format;
2567 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2568 return -EINVAL;
2569 /* make interface to low-level uniform */
2570 entry.cdte_format = CDROM_MSF;
2571 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2572 if (ret)
2573 return ret;
2574 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2575
2576 if (copy_to_user(argp, &entry, sizeof(entry)))
2577 return -EFAULT;
2578 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2579 return 0;
2580}
2581
2582static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2583 void __user *argp)
2584{
2585 struct cdrom_msf msf;
2586
2587 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2588
2589 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2590 return -ENOSYS;
2591 if (copy_from_user(&msf, argp, sizeof(msf)))
2592 return -EFAULT;
2593 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2594}
2595
2596static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2597 void __user *argp)
2598{
2599 struct cdrom_ti ti;
2600 int ret;
2601
2602 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2603
2604 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2605 return -ENOSYS;
2606 if (copy_from_user(&ti, argp, sizeof(ti)))
2607 return -EFAULT;
2608
2609 ret = check_for_audio_disc(cdi, cdi->ops);
2610 if (ret)
2611 return ret;
2612 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2613}
2614static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2615 void __user *argp)
2616{
2617 struct cdrom_volctrl volume;
2618
2619 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2620
2621 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2622 return -ENOSYS;
2623 if (copy_from_user(&volume, argp, sizeof(volume)))
2624 return -EFAULT;
2625 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2626}
2627
2628static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2629 void __user *argp)
2630{
2631 struct cdrom_volctrl volume;
2632 int ret;
2633
2634 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2635
2636 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2637 return -ENOSYS;
2638
2639 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2640 if (ret)
2641 return ret;
2642
2643 if (copy_to_user(argp, &volume, sizeof(volume)))
2644 return -EFAULT;
2645 return 0;
2646}
2647
2648static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2649 unsigned int cmd)
2650{
2651 int ret;
2652
2653 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2654
2655 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2656 return -ENOSYS;
2657 ret = check_for_audio_disc(cdi, cdi->ops);
2658 if (ret)
2659 return ret;
2660 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2661}
2662
2663/*
2664 * Just about every imaginable ioctl is supported in the Uniform layer
2665 * these days.
2666 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2667 */
bbc1cc97
AV		 2668int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2669 fmode_t mode, unsigned int cmd, unsigned long arg)
d2c5d4fc
CH		 2670{
2671 void __user *argp = (void __user *)arg;
2672 int ret;
bbc1cc97 2673 struct gendisk *disk = bdev->bd_disk;
d2c5d4fc
CH		 2674
2675 /*
2676 * Try the generic SCSI command ioctl's first.
2677 */
bbc1cc97 2678 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
d2c5d4fc
CH		 2679 if (ret != -ENOTTY)
2680 return ret;
2681
2682 switch (cmd) {
2683 case CDROMMULTISESSION:
2684 return cdrom_ioctl_multisession(cdi, argp);
2685 case CDROMEJECT:
2686 return cdrom_ioctl_eject(cdi);
2687 case CDROMCLOSETRAY:
2688 return cdrom_ioctl_closetray(cdi);
2689 case CDROMEJECT_SW:
2690 return cdrom_ioctl_eject_sw(cdi, arg);
2691 case CDROM_MEDIA_CHANGED:
2692 return cdrom_ioctl_media_changed(cdi, arg);
2693 case CDROM_SET_OPTIONS:
2694 return cdrom_ioctl_set_options(cdi, arg);
2695 case CDROM_CLEAR_OPTIONS:
2696 return cdrom_ioctl_clear_options(cdi, arg);
2697 case CDROM_SELECT_SPEED:
2698 return cdrom_ioctl_select_speed(cdi, arg);
2699 case CDROM_SELECT_DISC:
2700 return cdrom_ioctl_select_disc(cdi, arg);
2701 case CDROMRESET:
bbc1cc97 2702 return cdrom_ioctl_reset(cdi, bdev);
d2c5d4fc
CH		 2703 case CDROM_LOCKDOOR:
2704 return cdrom_ioctl_lock_door(cdi, arg);
2705 case CDROM_DEBUG:
2706 return cdrom_ioctl_debug(cdi, arg);
2707 case CDROM_GET_CAPABILITY:
2708 return cdrom_ioctl_get_capability(cdi);
2709 case CDROM_GET_MCN:
2710 return cdrom_ioctl_get_mcn(cdi, argp);
2711 case CDROM_DRIVE_STATUS:
2712 return cdrom_ioctl_drive_status(cdi, arg);
2713 case CDROM_DISC_STATUS:
2714 return cdrom_ioctl_disc_status(cdi);
2715 case CDROM_CHANGER_NSLOTS:
2716 return cdrom_ioctl_changer_nslots(cdi);
2717 }
2718
2719 /*
2720 * Use the ioctls that are implemented through the generic_packet()
2721 * interface. this may look at bit funny, but if -ENOTTY is
2722 * returned that particular ioctl is not implemented and we
2723 * let it go through the device specific ones.
2724 */
1da177e4
LT		 2725 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2726 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2727 if (ret != -ENOTTY)
1da177e4 2728 return ret;
1da177e4
LT		 2729 }
2730
d2c5d4fc
CH		 2731 /*
2732 * Note: most of the cdinfo() calls are commented out here,
2733 * because they fill up the sys log when CD players poll
2734 * the drive.
2735 */
1da177e4 2736 switch (cmd) {
d2c5d4fc
CH		 2737 case CDROMSUBCHNL:
2738 return cdrom_ioctl_get_subchnl(cdi, argp);
2739 case CDROMREADTOCHDR:
2740 return cdrom_ioctl_read_tochdr(cdi, argp);
2741 case CDROMREADTOCENTRY:
2742 return cdrom_ioctl_read_tocentry(cdi, argp);
2743 case CDROMPLAYMSF:
2744 return cdrom_ioctl_play_msf(cdi, argp);
2745 case CDROMPLAYTRKIND:
2746 return cdrom_ioctl_play_trkind(cdi, argp);
2747 case CDROMVOLCTRL:
2748 return cdrom_ioctl_volctrl(cdi, argp);
2749 case CDROMVOLREAD:
2750 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2751 case CDROMSTART:
2752 case CDROMSTOP:
2753 case CDROMPAUSE:
d2c5d4fc
CH		 2754 case CDROMRESUME:
2755 return cdrom_ioctl_audioctl(cdi, cmd);
2756 }
1da177e4 2757
1da177e4
LT		 2758 return -ENOSYS;
2759}
2760
1da177e4
LT		 2761/*
2762 * Required when we need to use READ_10 to issue other than 2048 block
2763 * reads
2764 */
2765static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2766{
2767 struct cdrom_device_ops *cdo = cdi->ops;
2768 struct packet_command cgc;
2769 struct modesel_head mh;
2770
2771 memset(&mh, 0, sizeof(mh));
2772 mh.block_desc_length = 0x08;
2773 mh.block_length_med = (size >> 8) & 0xff;
2774 mh.block_length_lo = size & 0xff;
2775
2776 memset(&cgc, 0, sizeof(cgc));
2777 cgc.cmd[0] = 0x15;
2778 cgc.cmd[1] = 1 << 4;
2779 cgc.cmd[4] = 12;
2780 cgc.buflen = sizeof(mh);
2781 cgc.buffer = (char *) &mh;
2782 cgc.data_direction = CGC_DATA_WRITE;
2783 mh.block_desc_length = 0x08;
2784 mh.block_length_med = (size >> 8) & 0xff;
2785 mh.block_length_lo = size & 0xff;
2786
2787 return cdo->generic_packet(cdi, &cgc);
2788}
2789
2790static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
2791 unsigned long arg)
2792{
2793 struct cdrom_device_ops *cdo = cdi->ops;
2794 struct packet_command cgc;
2795 struct request_sense sense;
2796 unsigned char buffer[32];
2797 int ret = 0;
2798
2799 memset(&cgc, 0, sizeof(cgc));
2800
2801 /* build a unified command and queue it through
2802 cdo->generic_packet() */
2803 switch (cmd) {
2804 case CDROMREADRAW:
2805 case CDROMREADMODE1:
2806 case CDROMREADMODE2: {
2807 struct cdrom_msf msf;
2808 int blocksize = 0, format = 0, lba;
2809
2810 switch (cmd) {
2811 case CDROMREADRAW:
2812 blocksize = CD_FRAMESIZE_RAW;
2813 break;
2814 case CDROMREADMODE1:
2815 blocksize = CD_FRAMESIZE;
2816 format = 2;
2817 break;
2818 case CDROMREADMODE2:
2819 blocksize = CD_FRAMESIZE_RAW0;
2820 break;
2821 }
2822 IOCTL_IN(arg, struct cdrom_msf, msf);
2823 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0);
2824 /* FIXME: we need upper bound checking, too!! */
2825 if (lba < 0)
2826 return -EINVAL;
5cbded58 2827 cgc.buffer = kmalloc(blocksize, GFP_KERNEL);
1da177e4
LT		 2828 if (cgc.buffer == NULL)
2829 return -ENOMEM;
2830 memset(&sense, 0, sizeof(sense));
2831 cgc.sense = &sense;
2832 cgc.data_direction = CGC_DATA_READ;
2833 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize);
2834 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) {
2835 /*
2836 * SCSI-II devices are not required to support
2837 * READ_CD, so let's try switching block size
2838 */
2839 /* FIXME: switch back again... */
2840 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) {
2841 kfree(cgc.buffer);
2842 return ret;
2843 }
2844 cgc.sense = NULL;
2845 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1);
2846 ret |= cdrom_switch_blocksize(cdi, blocksize);
2847 }
2848 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize))
2849 ret = -EFAULT;
2850 kfree(cgc.buffer);
2851 return ret;
2852 }
2853 case CDROMREADAUDIO: {
2854 struct cdrom_read_audio ra;
2855 int lba;
2856
2857 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2858
2859 if (ra.addr_format == CDROM_MSF)
2860 lba = msf_to_lba(ra.addr.msf.minute,
2861 ra.addr.msf.second,
2862 ra.addr.msf.frame);
2863 else if (ra.addr_format == CDROM_LBA)
2864 lba = ra.addr.lba;
2865 else
2866 return -EINVAL;
2867
2868 /* FIXME: we need upper bound checking, too!! */
2869 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2870 return -EINVAL;
2871
2872 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2873 }
2874 case CDROMSUBCHNL: {
2875 struct cdrom_subchnl q;
2876 u_char requested, back;
2877 IOCTL_IN(arg, struct cdrom_subchnl, q);
2878 requested = q.cdsc_format;
2879 if (!((requested == CDROM_MSF) ||
2880 (requested == CDROM_LBA)))
2881 return -EINVAL;
2882 q.cdsc_format = CDROM_MSF;
2883 if ((ret = cdrom_read_subchannel(cdi, &q, 0)))
2884 return ret;
2885 back = q.cdsc_format; /* local copy */
2886 sanitize_format(&q.cdsc_absaddr, &back, requested);
2887 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2888 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2889 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2890 return 0;
2891 }
2892 case CDROMPLAYMSF: {
2893 struct cdrom_msf msf;
2894 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2895 IOCTL_IN(arg, struct cdrom_msf, msf);
2896 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2897 cgc.cmd[3] = msf.cdmsf_min0;
2898 cgc.cmd[4] = msf.cdmsf_sec0;
2899 cgc.cmd[5] = msf.cdmsf_frame0;
2900 cgc.cmd[6] = msf.cdmsf_min1;
2901 cgc.cmd[7] = msf.cdmsf_sec1;
2902 cgc.cmd[8] = msf.cdmsf_frame1;
2903 cgc.data_direction = CGC_DATA_NONE;
2904 return cdo->generic_packet(cdi, &cgc);
2905 }
2906 case CDROMPLAYBLK: {
2907 struct cdrom_blk blk;
2908 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2909 IOCTL_IN(arg, struct cdrom_blk, blk);
2910 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10;
2911 cgc.cmd[2] = (blk.from >> 24) & 0xff;
2912 cgc.cmd[3] = (blk.from >> 16) & 0xff;
2913 cgc.cmd[4] = (blk.from >> 8) & 0xff;
2914 cgc.cmd[5] = blk.from & 0xff;
2915 cgc.cmd[7] = (blk.len >> 8) & 0xff;
2916 cgc.cmd[8] = blk.len & 0xff;
2917 cgc.data_direction = CGC_DATA_NONE;
2918 return cdo->generic_packet(cdi, &cgc);
2919 }
2920 case CDROMVOLCTRL:
2921 case CDROMVOLREAD: {
2922 struct cdrom_volctrl volctrl;
2923 char mask[sizeof(buffer)];
2924 unsigned short offset;
2925
2926 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
2927
2928 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
2929
2930 cgc.buffer = buffer;
2931 cgc.buflen = 24;
2932 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0)))
2933 return ret;
2934
2935 /* originally the code depended on buffer[1] to determine
2936 how much data is available for transfer. buffer[1] is
2937 unfortunately ambigious and the only reliable way seem
2938 to be to simply skip over the block descriptor... */
56052d52 2939 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6));
1da177e4
LT		 2940
2941 if (offset + 16 > sizeof(buffer))
2942 return -E2BIG;
2943
2944 if (offset + 16 > cgc.buflen) {
2945 cgc.buflen = offset+16;
2946 ret = cdrom_mode_sense(cdi, &cgc,
2947 GPMODE_AUDIO_CTL_PAGE, 0);
2948 if (ret)
2949 return ret;
2950 }
2951
2952 /* sanity check */
2953 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
2954 buffer[offset+1] < 14)
2955 return -EINVAL;
2956
2957 /* now we have the current volume settings. if it was only
2958 a CDROMVOLREAD, return these values */
2959 if (cmd == CDROMVOLREAD) {
2960 volctrl.channel0 = buffer[offset+9];
2961 volctrl.channel1 = buffer[offset+11];
2962 volctrl.channel2 = buffer[offset+13];
2963 volctrl.channel3 = buffer[offset+15];
2964 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
2965 return 0;
2966 }
2967
2968 /* get the volume mask */
2969 cgc.buffer = mask;
2970 if ((ret = cdrom_mode_sense(cdi, &cgc,
2971 GPMODE_AUDIO_CTL_PAGE, 1)))
2972 return ret;
2973
2974 buffer[offset+9] = volctrl.channel0 & mask[offset+9];
2975 buffer[offset+11] = volctrl.channel1 & mask[offset+11];
2976 buffer[offset+13] = volctrl.channel2 & mask[offset+13];
2977 buffer[offset+15] = volctrl.channel3 & mask[offset+15];
2978
2979 /* set volume */
2980 cgc.buffer = buffer + offset - 8;
2981 memset(cgc.buffer, 0, 8);
2982 return cdrom_mode_select(cdi, &cgc);
2983 }
2984
2985 case CDROMSTART:
2986 case CDROMSTOP: {
2987 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
2988 cgc.cmd[0] = GPCMD_START_STOP_UNIT;
2989 cgc.cmd[1] = 1;
2990 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
2991 cgc.data_direction = CGC_DATA_NONE;
2992 return cdo->generic_packet(cdi, &cgc);
2993 }
2994
2995 case CDROMPAUSE:
2996 case CDROMRESUME: {
2997 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
2998 cgc.cmd[0] = GPCMD_PAUSE_RESUME;
2999 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3000 cgc.data_direction = CGC_DATA_NONE;
3001 return cdo->generic_packet(cdi, &cgc);
3002 }
3003
3004 case DVD_READ_STRUCT: {
3005 dvd_struct *s;
3006 int size = sizeof(dvd_struct);
3007 if (!CDROM_CAN(CDC_DVD))
3008 return -ENOSYS;
5cbded58 3009 if ((s = kmalloc(size, GFP_KERNEL)) == NULL)
1da177e4
LT		 3010 return -ENOMEM;
3011 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3012 if (copy_from_user(s, (dvd_struct __user *)arg, size)) {
3013 kfree(s);
3014 return -EFAULT;
3015 }
3016 if ((ret = dvd_read_struct(cdi, s))) {
3017 kfree(s);
3018 return ret;
3019 }
3020 if (copy_to_user((dvd_struct __user *)arg, s, size))
3021 ret = -EFAULT;
3022 kfree(s);
3023 return ret;
3024 }
3025
3026 case DVD_AUTH: {
3027 dvd_authinfo ai;
3028 if (!CDROM_CAN(CDC_DVD))
3029 return -ENOSYS;
3030 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3031 IOCTL_IN(arg, dvd_authinfo, ai);
3032 if ((ret = dvd_do_auth (cdi, &ai)))
3033 return ret;
3034 IOCTL_OUT(arg, dvd_authinfo, ai);
3035 return 0;
3036 }
3037
3038 case CDROM_NEXT_WRITABLE: {
3039 long next = 0;
3040 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3041 if ((ret = cdrom_get_next_writable(cdi, &next)))
3042 return ret;
3043 IOCTL_OUT(arg, long, next);
3044 return 0;
3045 }
3046 case CDROM_LAST_WRITTEN: {
3047 long last = 0;
3048 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3049 if ((ret = cdrom_get_last_written(cdi, &last)))
3050 return ret;
3051 IOCTL_OUT(arg, long, last);
3052 return 0;
3053 }
3054 } /* switch */
3055
3056 return -ENOTTY;
3057}
3058
3059static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3060 track_information *ti)
3061{
3062 struct cdrom_device_ops *cdo = cdi->ops;
3063 struct packet_command cgc;
3064 int ret, buflen;
3065
3066 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3067 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3068 cgc.cmd[1] = type & 3;
3069 cgc.cmd[4] = (track & 0xff00) >> 8;
3070 cgc.cmd[5] = track & 0xff;
3071 cgc.cmd[8] = 8;
3072 cgc.quiet = 1;
3073
3074 if ((ret = cdo->generic_packet(cdi, &cgc)))
3075 return ret;
3076
3077 buflen = be16_to_cpu(ti->track_information_length) +
3078 sizeof(ti->track_information_length);
3079
3080 if (buflen > sizeof(track_information))
3081 buflen = sizeof(track_information);
3082
3083 cgc.cmd[8] = cgc.buflen = buflen;
3084 if ((ret = cdo->generic_packet(cdi, &cgc)))
3085 return ret;
3086
3087 /* return actual fill size */
3088 return buflen;
3089}
3090
3091/* requires CD R/RW */
3092static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3093{
3094 struct cdrom_device_ops *cdo = cdi->ops;
3095 struct packet_command cgc;
3096 int ret, buflen;
3097
3098 /* set up command and get the disc info */
3099 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3100 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3101 cgc.cmd[8] = cgc.buflen = 2;
3102 cgc.quiet = 1;
3103
3104 if ((ret = cdo->generic_packet(cdi, &cgc)))
3105 return ret;
3106
3107 /* not all drives have the same disc_info length, so requeue
3108 * packet with the length the drive tells us it can supply
3109 */
3110 buflen = be16_to_cpu(di->disc_information_length) +
3111 sizeof(di->disc_information_length);
3112
3113 if (buflen > sizeof(disc_information))
3114 buflen = sizeof(disc_information);
3115
3116 cgc.cmd[8] = cgc.buflen = buflen;
3117 if ((ret = cdo->generic_packet(cdi, &cgc)))
3118 return ret;
3119
3120 /* return actual fill size */
3121 return buflen;
3122}
3123
3124/* return the last written block on the CD-R media. this is for the udf
3125 file system. */
3126int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3127{
3128 struct cdrom_tocentry toc;
3129 disc_information di;
3130 track_information ti;
3131 __u32 last_track;
3132 int ret = -1, ti_size;
3133
3134 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3135 goto use_toc;
3136
3137 ret = cdrom_get_disc_info(cdi, &di);
3138 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3139 + sizeof(di.last_track_lsb)))
3140 goto use_toc;
3141
3142 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3143 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3144 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3145 if (ti_size < (int)offsetof(typeof(ti), track_start))
3146 goto use_toc;
3147
3148 /* if this track is blank, try the previous. */
3149 if (ti.blank) {
3150 if (last_track==1)
3151 goto use_toc;
3152 last_track--;
3153 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3154 }
3155
3156 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3157 + sizeof(ti.track_size)))
3158 goto use_toc;
3159
3160 /* if last recorded field is valid, return it. */
3161 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3162 + sizeof(ti.last_rec_address))) {
3163 *last_written = be32_to_cpu(ti.last_rec_address);
3164 } else {
3165 /* make it up instead */
3166 *last_written = be32_to_cpu(ti.track_start) +
3167 be32_to_cpu(ti.track_size);
3168 if (ti.free_blocks)
3169 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3170 }
3171 return 0;
3172
3173 /* this is where we end up if the drive either can't do a
3174 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3175 it doesn't give enough information or fails. then we return
3176 the toc contents. */
3177use_toc:
3178 toc.cdte_format = CDROM_MSF;
3179 toc.cdte_track = CDROM_LEADOUT;
3180 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3181 return ret;
3182 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3183 *last_written = toc.cdte_addr.lba;
3184 return 0;
3185}
3186
3187/* return the next writable block. also for udf file system. */
3188static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3189{
3190 disc_information di;
3191 track_information ti;
3192 __u16 last_track;
3193 int ret, ti_size;
3194
3195 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3196 goto use_last_written;
3197
3198 ret = cdrom_get_disc_info(cdi, &di);
3199 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3200 + sizeof(di.last_track_lsb))
3201 goto use_last_written;
3202
3203 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3204 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3205 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3206 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3207 goto use_last_written;
3208
3209 /* if this track is blank, try the previous. */
3210 if (ti.blank) {
3211 if (last_track == 1)
3212 goto use_last_written;
3213 last_track--;
3214 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3215 if (ti_size < 0)
3216 goto use_last_written;
3217 }
3218
3219 /* if next recordable address field is valid, use it. */
3220 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3221 + sizeof(ti.next_writable)) {
3222 *next_writable = be32_to_cpu(ti.next_writable);
3223 return 0;
3224 }
3225
3226use_last_written:
3227 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3228 *next_writable = 0;
3229 return ret;
3230 } else {
3231 *next_writable += 7;
3232 return 0;
3233 }
3234}
3235
3236EXPORT_SYMBOL(cdrom_get_last_written);
3237EXPORT_SYMBOL(register_cdrom);
3238EXPORT_SYMBOL(unregister_cdrom);
3239EXPORT_SYMBOL(cdrom_open);
3240EXPORT_SYMBOL(cdrom_release);
3241EXPORT_SYMBOL(cdrom_ioctl);
3242EXPORT_SYMBOL(cdrom_media_changed);
3243EXPORT_SYMBOL(cdrom_number_of_slots);
3244EXPORT_SYMBOL(cdrom_mode_select);
3245EXPORT_SYMBOL(cdrom_mode_sense);
3246EXPORT_SYMBOL(init_cdrom_command);
3247EXPORT_SYMBOL(cdrom_get_media_event);
3248
3249#ifdef CONFIG_SYSCTL
3250
3251#define CDROM_STR_SIZE 1000
3252
3253static struct cdrom_sysctl_settings {
3254 char info[CDROM_STR_SIZE]; /* general info */
3255 int autoclose; /* close tray upon mount, etc */
3256 int autoeject; /* eject on umount */
3257 int debug; /* turn on debugging messages */
3258 int lock; /* lock the door on device open */
3259 int check; /* check media type */
3260} cdrom_sysctl_settings;
3261
554988d6
DY		 3262enum cdrom_print_option {
3263 CTL_NAME,
3264 CTL_SPEED,
3265 CTL_SLOTS,
3266 CTL_CAPABILITY
3267};
3268
3269static int cdrom_print_info(const char *header, int val, char *info,
3270 int *pos, enum cdrom_print_option option)
3271{
3272 const int max_size = sizeof(cdrom_sysctl_settings.info);
3273 struct cdrom_device_info *cdi;
3274 int ret;
3275
3276 ret = scnprintf(info + *pos, max_size - *pos, header);
3277 if (!ret)
3278 return 1;
3279
3280 *pos += ret;
3281
7fd097d4 3282 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3283 switch (option) {
3284 case CTL_NAME:
3285 ret = scnprintf(info + *pos, max_size - *pos,
3286 "\t%s", cdi->name);
3287 break;
3288 case CTL_SPEED:
3289 ret = scnprintf(info + *pos, max_size - *pos,
3290 "\t%d", cdi->speed);
3291 break;
3292 case CTL_SLOTS:
3293 ret = scnprintf(info + *pos, max_size - *pos,
3294 "\t%d", cdi->capacity);
3295 break;
3296 case CTL_CAPABILITY:
3297 ret = scnprintf(info + *pos, max_size - *pos,
3298 "\t%d", CDROM_CAN(val) != 0);
3299 break;
3300 default:
3301 printk(KERN_INFO "cdrom: invalid option%d\n", option);
3302 return 1;
3303 }
3304 if (!ret)
3305 return 1;
3306 *pos += ret;
3307 }
3308
3309 return 0;
3310}
3311
1da177e4
LT		 3312static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp,
3313 void __user *buffer, size_t *lenp, loff_t *ppos)
3314{
554988d6 3315 int pos;
1da177e4 3316 char *info = cdrom_sysctl_settings.info;
554988d6 3317 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3318
3319 if (!*lenp || (*ppos && !write)) {
3320 *lenp = 0;
3321 return 0;
3322 }
3323
554988d6
DY		 3324 mutex_lock(&cdrom_mutex);
3325
1da177e4
LT		 3326 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3327
554988d6
DY		 3328 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3329 goto done;
3330 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3331 goto done;
3332 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3333 goto done;
3334 if (cdrom_print_info("\nCan close tray:\t",
3335 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3336 goto done;
3337 if (cdrom_print_info("\nCan open tray:\t",
3338 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3339 goto done;
3340 if (cdrom_print_info("\nCan lock tray:\t",
3341 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3342 goto done;
3343 if (cdrom_print_info("\nCan change speed:",
3344 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3345 goto done;
3346 if (cdrom_print_info("\nCan select disk:",
3347 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3348 goto done;
3349 if (cdrom_print_info("\nCan read multisession:",
3350 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3351 goto done;
3352 if (cdrom_print_info("\nCan read MCN:\t",
3353 CDC_MCN, info, &pos, CTL_CAPABILITY))
3354 goto done;
3355 if (cdrom_print_info("\nReports media changed:",
3356 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3357 goto done;
3358 if (cdrom_print_info("\nCan play audio:\t",
3359 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3360 goto done;
3361 if (cdrom_print_info("\nCan write CD-R:\t",
3362 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3363 goto done;
3364 if (cdrom_print_info("\nCan write CD-RW:",
3365 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3366 goto done;
3367 if (cdrom_print_info("\nCan read DVD:\t",
3368 CDC_DVD, info, &pos, CTL_CAPABILITY))
3369 goto done;
3370 if (cdrom_print_info("\nCan write DVD-R:",
3371 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3372 goto done;
3373 if (cdrom_print_info("\nCan write DVD-RAM:",
3374 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3375 goto done;
3376 if (cdrom_print_info("\nCan read MRW:\t",
3377 CDC_MRW, info, &pos, CTL_CAPABILITY))
3378 goto done;
3379 if (cdrom_print_info("\nCan write MRW:\t",
3380 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3381 goto done;
3382 if (cdrom_print_info("\nCan write RAM:\t",
3383 CDC_RAM, info, &pos, CTL_CAPABILITY))
3384 goto done;
3385 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3386 goto done;
3387doit:
3388 mutex_unlock(&cdrom_mutex);
3389 return proc_dostring(ctl, write, filp, buffer, lenp, ppos);
3390done:
3391 printk(KERN_INFO "cdrom: info buffer too small\n");
3392 goto doit;
1da177e4
LT		 3393}
3394
3395/* Unfortunately, per device settings are not implemented through
3396 procfs/sysctl yet. When they are, this will naturally disappear. For now
3397 just update all drives. Later this will become the template on which
3398 new registered drives will be based. */
3399static void cdrom_update_settings(void)
3400{
3401 struct cdrom_device_info *cdi;
3402
032d8d90 3403 mutex_lock(&cdrom_mutex);
7fd097d4 3404 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3405 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3406 cdi->options |= CDO_AUTO_CLOSE;
3407 else if (!autoclose)
3408 cdi->options &= ~CDO_AUTO_CLOSE;
3409 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3410 cdi->options |= CDO_AUTO_EJECT;
3411 else if (!autoeject)
3412 cdi->options &= ~CDO_AUTO_EJECT;
3413 if (lockdoor && CDROM_CAN(CDC_LOCK))
3414 cdi->options |= CDO_LOCK;
3415 else if (!lockdoor)
3416 cdi->options &= ~CDO_LOCK;
3417 if (check_media_type)
3418 cdi->options |= CDO_CHECK_TYPE;
3419 else
3420 cdi->options &= ~CDO_CHECK_TYPE;
3421 }
032d8d90 3422 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3423}
3424
3425static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp,
3426 void __user *buffer, size_t *lenp, loff_t *ppos)
3427{
1da177e4
LT		 3428 int ret;
3429
3430 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
3431
06489b4e 3432 if (write) {
1da177e4
LT		 3433
3434 /* we only care for 1 or 0. */
06489b4e
EB		 3435 autoclose = !!cdrom_sysctl_settings.autoclose;
3436 autoeject = !!cdrom_sysctl_settings.autoeject;
3437 debug = !!cdrom_sysctl_settings.debug;
3438 lockdoor = !!cdrom_sysctl_settings.lock;
3439 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3440
1da177e4
LT		 3441 /* update the option flags according to the changes. we
3442 don't have per device options through sysctl yet,
3443 but we will have and then this will disappear. */
3444 cdrom_update_settings();
3445 }
3446
3447 return ret;
3448}
3449
3450/* Place files in /proc/sys/dev/cdrom */
3451static ctl_table cdrom_table[] = {
3452 {
1da177e4
LT		 3453 .procname = "info",
3454 .data = &cdrom_sysctl_settings.info,
3455 .maxlen = CDROM_STR_SIZE,
3456 .mode = 0444,
3457 .proc_handler = &cdrom_sysctl_info,
3458 },
3459 {
1da177e4
LT		 3460 .procname = "autoclose",
3461 .data = &cdrom_sysctl_settings.autoclose,
3462 .maxlen = sizeof(int),
3463 .mode = 0644,
3464 .proc_handler = &cdrom_sysctl_handler,
3465 },
3466 {
1da177e4
LT		 3467 .procname = "autoeject",
3468 .data = &cdrom_sysctl_settings.autoeject,
3469 .maxlen = sizeof(int),
3470 .mode = 0644,
3471 .proc_handler = &cdrom_sysctl_handler,
3472 },
3473 {
1da177e4
LT		 3474 .procname = "debug",
3475 .data = &cdrom_sysctl_settings.debug,
3476 .maxlen = sizeof(int),
3477 .mode = 0644,
3478 .proc_handler = &cdrom_sysctl_handler,
3479 },
3480 {
1da177e4
LT		 3481 .procname = "lock",
3482 .data = &cdrom_sysctl_settings.lock,
3483 .maxlen = sizeof(int),
3484 .mode = 0644,
3485 .proc_handler = &cdrom_sysctl_handler,
3486 },
3487 {
1da177e4
LT		 3488 .procname = "check_media",
3489 .data = &cdrom_sysctl_settings.check,
3490 .maxlen = sizeof(int),
3491 .mode = 0644,
3492 .proc_handler = &cdrom_sysctl_handler
3493 },
3494 { .ctl_name = 0 }
3495};
3496
3497static ctl_table cdrom_cdrom_table[] = {
3498 {
3499 .ctl_name = DEV_CDROM,
3500 .procname = "cdrom",
3501 .maxlen = 0,
3502 .mode = 0555,
3503 .child = cdrom_table,
3504 },
3505 { .ctl_name = 0 }
3506};
3507
3508/* Make sure that /proc/sys/dev is there */
3509static ctl_table cdrom_root_table[] = {
3510 {
3511 .ctl_name = CTL_DEV,
3512 .procname = "dev",
3513 .maxlen = 0,
3514 .mode = 0555,
3515 .child = cdrom_cdrom_table,
3516 },
3517 { .ctl_name = 0 }
3518};
3519static struct ctl_table_header *cdrom_sysctl_header;
3520
3521static void cdrom_sysctl_register(void)
3522{
3523 static int initialized;
3524
3525 if (initialized == 1)
3526 return;
3527
0b4d4147 3528 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3529
3530 /* set the defaults */
3531 cdrom_sysctl_settings.autoclose = autoclose;
3532 cdrom_sysctl_settings.autoeject = autoeject;
3533 cdrom_sysctl_settings.debug = debug;
3534 cdrom_sysctl_settings.lock = lockdoor;
3535 cdrom_sysctl_settings.check = check_media_type;
3536
3537 initialized = 1;
3538}
3539
3540static void cdrom_sysctl_unregister(void)
3541{
3542 if (cdrom_sysctl_header)
3543 unregister_sysctl_table(cdrom_sysctl_header);
3544}
3545
17672cf0
AM		 3546#else /* CONFIG_SYSCTL */
3547
3548static void cdrom_sysctl_register(void)
3549{
3550}
3551
3552static void cdrom_sysctl_unregister(void)
3553{
3554}
3555
1da177e4
LT		 3556#endif /* CONFIG_SYSCTL */
3557
3558static int __init cdrom_init(void)
3559{
1da177e4 3560 cdrom_sysctl_register();
17672cf0 3561
1da177e4
LT		 3562 return 0;
3563}
3564
3565static void __exit cdrom_exit(void)
3566{
3567 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n");
1da177e4 3568 cdrom_sysctl_unregister();
1da177e4
LT		 3569}
3570
3571module_init(cdrom_init);
3572module_exit(cdrom_exit);
3573MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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