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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
e597cd09
JP		 245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
1da177e4
LT		 247#define REVISION "Revision: 3.20"
248#define VERSION "Id: cdrom.c 3.20 2003/12/17"
249
250/* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252#define CD_NOTHING 0x0
253#define CD_WARNING 0x1
254#define CD_REG_UNREG 0x2
255#define CD_DO_IOCTL 0x4
256#define CD_OPEN 0x8
257#define CD_CLOSE 0x10
258#define CD_COUNT_TRACKS 0x20
259#define CD_CHANGER 0x40
260#define CD_DVD 0x80
261
262/* Define this to remove _all_ the debugging messages */
263/* #define ERRLOGMASK CD_NOTHING */
264#define ERRLOGMASK CD_WARNING
265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
267
1da177e4
LT		 268#include <linux/module.h>
269#include <linux/fs.h>
270#include <linux/buffer_head.h>
271#include <linux/major.h>
272#include <linux/types.h>
273#include <linux/errno.h>
274#include <linux/kernel.h>
275#include <linux/mm.h>
276#include <linux/slab.h>
277#include <linux/cdrom.h>
278#include <linux/sysctl.h>
279#include <linux/proc_fs.h>
280#include <linux/blkpg.h>
281#include <linux/init.h>
282#include <linux/fcntl.h>
283#include <linux/blkdev.h>
284#include <linux/times.h>
285
286#include <asm/uaccess.h>
287
288/* used to tell the module to turn on full debugging messages */
289static int debug;
290/* used to keep tray locked at all times */
291static int keeplocked;
292/* default compatibility mode */
293static int autoclose=1;
294static int autoeject;
295static int lockdoor = 1;
296/* will we ever get to use this... sigh. */
297static int check_media_type;
298/* automatically restart mrw format */
299static int mrw_format_restart = 1;
300module_param(debug, bool, 0);
301module_param(autoclose, bool, 0);
302module_param(autoeject, bool, 0);
303module_param(lockdoor, bool, 0);
304module_param(check_media_type, bool, 0);
305module_param(mrw_format_restart, bool, 0);
306
554988d6 307static DEFINE_MUTEX(cdrom_mutex);
1da177e4
LT		 308
309static const char *mrw_format_status[] = {
310 "not mrw",
311 "bgformat inactive",
312 "bgformat active",
313 "mrw complete",
314};
315
316static const char *mrw_address_space[] = { "DMA", "GAA" };
317
318#if (ERRLOGMASK!=CD_NOTHING)
e597cd09
JP		 319#define cdinfo(type, fmt, args...) \
320do { \
321 if ((ERRLOGMASK & type) || debug == 1) \
322 pr_info(fmt, ##args); \
323} while (0)
1da177e4 324#else
e597cd09
JP		 325#define cdinfo(type, fmt, args...) \
326do { \
327 if (0 && (ERRLOGMASK & type) || debug == 1) \
328 pr_info(fmt, ##args); \
329} while (0)
1da177e4
LT		 330#endif
331
332/* These are used to simplify getting data in from and back to user land */
333#define IOCTL_IN(arg, type, in) \
334 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \
335 return -EFAULT;
336
337#define IOCTL_OUT(arg, type, out) \
338 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \
339 return -EFAULT;
340
341/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
342 a lot of places. This macro makes the code more clear. */
343#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
344
345/* used in the audio ioctls */
346#define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret
347
2e11c207
JA		 348/*
349 * Another popular OS uses 7 seconds as the hard timeout for default
350 * commands, so it is a good choice for us as well.
351 */
352#define CDROM_DEF_TIMEOUT (7 * HZ)
353
1da177e4
LT		 354/* Not-exported routines. */
355static int open_for_data(struct cdrom_device_info * cdi);
356static int check_for_audio_disc(struct cdrom_device_info * cdi,
357 struct cdrom_device_ops * cdo);
358static void sanitize_format(union cdrom_addr *addr,
359 u_char * curr, u_char requested);
360static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
361 unsigned long arg);
362
363int cdrom_get_last_written(struct cdrom_device_info *, long *);
364static int cdrom_get_next_writable(struct cdrom_device_info *, long *);
365static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*);
366
367static int cdrom_mrw_exit(struct cdrom_device_info *cdi);
368
369static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di);
370
1da177e4 371static void cdrom_sysctl_register(void);
17672cf0 372
7fd097d4 373static LIST_HEAD(cdrom_list);
1da177e4
LT		 374
375static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
376 struct packet_command *cgc)
377{
378 if (cgc->sense) {
379 cgc->sense->sense_key = 0x05;
380 cgc->sense->asc = 0x20;
381 cgc->sense->ascq = 0x00;
382 }
383
384 cgc->stat = -EIO;
385 return -EIO;
386}
387
388/* This macro makes sure we don't have to check on cdrom_device_ops
389 * existence in the run-time routines below. Change_capability is a
390 * hack to have the capability flags defined const, while we can still
391 * change it here without gcc complaining at every line.
392 */
393#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits)
394
395int register_cdrom(struct cdrom_device_info *cdi)
396{
397 static char banner_printed;
398 struct cdrom_device_ops *cdo = cdi->ops;
399 int *change_capability = (int *)&cdo->capability; /* hack */
400
401 cdinfo(CD_OPEN, "entering register_cdrom\n");
402
403 if (cdo->open == NULL || cdo->release == NULL)
3c3f4e01 404 return -EINVAL;
1da177e4 405 if (!banner_printed) {
e597cd09 406 pr_info("Uniform CD-ROM driver " REVISION "\n");
1da177e4 407 banner_printed = 1;
1da177e4 408 cdrom_sysctl_register();
1da177e4
LT		 409 }
410
411 ENSURE(drive_status, CDC_DRIVE_STATUS );
412 ENSURE(media_changed, CDC_MEDIA_CHANGED);
413 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
414 ENSURE(lock_door, CDC_LOCK);
415 ENSURE(select_speed, CDC_SELECT_SPEED);
416 ENSURE(get_last_session, CDC_MULTI_SESSION);
417 ENSURE(get_mcn, CDC_MCN);
418 ENSURE(reset, CDC_RESET);
1da177e4
LT		 419 ENSURE(generic_packet, CDC_GENERIC_PACKET);
420 cdi->mc_flags = 0;
421 cdo->n_minors = 0;
422 cdi->options = CDO_USE_FFLAGS;
423
424 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY))
425 cdi->options |= (int) CDO_AUTO_CLOSE;
426 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY))
427 cdi->options |= (int) CDO_AUTO_EJECT;
428 if (lockdoor==1)
429 cdi->options |= (int) CDO_LOCK;
430 if (check_media_type==1)
431 cdi->options |= (int) CDO_CHECK_TYPE;
432
433 if (CDROM_CAN(CDC_MRW_W))
434 cdi->exit = cdrom_mrw_exit;
435
436 if (cdi->disk)
437 cdi->cdda_method = CDDA_BPC_FULL;
438 else
439 cdi->cdda_method = CDDA_OLD;
440
441 if (!cdo->generic_packet)
442 cdo->generic_packet = cdrom_dummy_generic_packet;
443
444 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
554988d6 445 mutex_lock(&cdrom_mutex);
7fd097d4 446 list_add(&cdi->list, &cdrom_list);
554988d6 447 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 448 return 0;
449}
450#undef ENSURE
451
0a0c4114 452void unregister_cdrom(struct cdrom_device_info *cdi)
1da177e4 453{
1da177e4
LT		 454 cdinfo(CD_OPEN, "entering unregister_cdrom\n");
455
554988d6 456 mutex_lock(&cdrom_mutex);
7fd097d4 457 list_del(&cdi->list);
554988d6 458 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 459
460 if (cdi->exit)
461 cdi->exit(cdi);
462
463 cdi->ops->n_minors--;
464 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
1da177e4
LT		 465}
466
467int cdrom_get_media_event(struct cdrom_device_info *cdi,
468 struct media_event_desc *med)
469{
470 struct packet_command cgc;
fce53847
FT		 471 unsigned char buffer[8];
472 struct event_header *eh = (struct event_header *) buffer;
1da177e4 473
fce53847 474 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 475 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
476 cgc.cmd[1] = 1; /* IMMED */
477 cgc.cmd[4] = 1 << 4; /* media event */
fce53847 478 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 479 cgc.quiet = 1;
480
481 if (cdi->ops->generic_packet(cdi, &cgc))
fce53847 482 return 1;
1da177e4
LT		 483
484 if (be16_to_cpu(eh->data_len) < sizeof(*med))
fce53847 485 return 1;
1da177e4
LT		 486
487 if (eh->nea || eh->notification_class != 0x4)
fce53847 488 return 1;
1da177e4 489
fce53847
FT		 490 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
491 return 0;
1da177e4
LT		 492}
493
494/*
495 * the first prototypes used 0x2c as the page code for the mrw mode page,
496 * subsequently this was changed to 0x03. probe the one used by this drive
497 */
498static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
499{
500 struct packet_command cgc;
fce53847 501 char buffer[16];
1da177e4 502
fce53847 503 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 504
505 cgc.timeout = HZ;
506 cgc.quiet = 1;
507
508 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
509 cdi->mrw_mode_page = MRW_MODE_PC;
fce53847 510 return 0;
1da177e4
LT		 511 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
512 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
fce53847 513 return 0;
1da177e4 514 }
fce53847
FT		 515
516 return 1;
1da177e4
LT		 517}
518
519static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
520{
521 struct packet_command cgc;
522 struct mrw_feature_desc *mfd;
fce53847 523 unsigned char buffer[16];
1da177e4
LT		 524 int ret;
525
526 *write = 0;
527
fce53847 528 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 529
530 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
531 cgc.cmd[3] = CDF_MRW;
fce53847 532 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 533 cgc.quiet = 1;
534
535 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 536 return ret;
1da177e4
LT		 537
538 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
fce53847
FT		 539 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
540 return 1;
1da177e4
LT		 541 *write = mfd->write;
542
543 if ((ret = cdrom_mrw_probe_pc(cdi))) {
544 *write = 0;
fce53847 545 return ret;
1da177e4 546 }
fce53847
FT		 547
548 return 0;
1da177e4
LT		 549}
550
551static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
552{
553 struct packet_command cgc;
fce53847 554 unsigned char buffer[12];
1da177e4
LT		 555 int ret;
556
e597cd09 557 pr_info("%sstarting format\n", cont ? "Re" : "");
1da177e4
LT		 558
559 /*
560 * FmtData bit set (bit 4), format type is 1
561 */
fce53847 562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
1da177e4
LT		 563 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
564 cgc.cmd[1] = (1 << 4) | 1;
565
566 cgc.timeout = 5 * 60 * HZ;
567
568 /*
569 * 4 byte format list header, 8 byte format list descriptor
570 */
571 buffer[1] = 1 << 1;
572 buffer[3] = 8;
573
574 /*
575 * nr_blocks field
576 */
577 buffer[4] = 0xff;
578 buffer[5] = 0xff;
579 buffer[6] = 0xff;
580 buffer[7] = 0xff;
581
582 buffer[8] = 0x24 << 2;
583 buffer[11] = cont;
584
585 ret = cdi->ops->generic_packet(cdi, &cgc);
586 if (ret)
e597cd09 587 pr_info("bgformat failed\n");
1da177e4
LT		 588
589 return ret;
590}
591
592static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
593{
594 struct packet_command cgc;
595
596 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
597 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
598
599 /*
600 * Session = 1, Track = 0
601 */
602 cgc.cmd[1] = !!immed;
603 cgc.cmd[2] = 1 << 1;
604
605 cgc.timeout = 5 * 60 * HZ;
606
607 return cdi->ops->generic_packet(cdi, &cgc);
608}
609
610static int cdrom_flush_cache(struct cdrom_device_info *cdi)
611{
612 struct packet_command cgc;
613
614 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
615 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
616
617 cgc.timeout = 5 * 60 * HZ;
618
619 return cdi->ops->generic_packet(cdi, &cgc);
620}
621
622static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
623{
624 disc_information di;
625 int ret;
626
627 ret = cdrom_get_disc_info(cdi, &di);
628 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
629 return 1;
630
631 ret = 0;
632 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
e597cd09 633 pr_info("issuing MRW background format suspend\n");
1da177e4
LT		 634 ret = cdrom_mrw_bgformat_susp(cdi, 0);
635 }
636
7da21a02 637 if (!ret && cdi->media_written)
1da177e4
LT		 638 ret = cdrom_flush_cache(cdi);
639
640 return ret;
641}
642
643static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
644{
645 struct packet_command cgc;
646 struct mode_page_header *mph;
fce53847 647 char buffer[16];
1da177e4
LT		 648 int ret, offset, size;
649
fce53847 650 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4 651
fce53847
FT		 652 cgc.buffer = buffer;
653 cgc.buflen = sizeof(buffer);
1da177e4
LT		 654
655 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0)))
fce53847 656 return ret;
1da177e4
LT		 657
658 mph = (struct mode_page_header *) buffer;
659 offset = be16_to_cpu(mph->desc_length);
660 size = be16_to_cpu(mph->mode_data_length) + 2;
661
662 buffer[offset + 3] = space;
663 cgc.buflen = size;
664
665 if ((ret = cdrom_mode_select(cdi, &cgc)))
fce53847 666 return ret;
1da177e4 667
e597cd09
JP		 668 pr_info("%s: mrw address space %s selected\n",
669 cdi->name, mrw_address_space[space]);
fce53847 670 return 0;
1da177e4
LT		 671}
672
673static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
674 struct rwrt_feature_desc *rfd)
675{
676 struct packet_command cgc;
fce53847 677 char buffer[24];
1da177e4
LT		 678 int ret;
679
fce53847 680 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 681
682 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
683 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
fce53847 684 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
1da177e4
LT		 685 cgc.quiet = 1;
686
687 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 688 return ret;
1da177e4
LT		 689
690 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
fce53847 691 return 0;
1da177e4
LT		 692}
693
694static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
695{
696 struct packet_command cgc;
fce53847 697 char buffer[16];
56052d52 698 __be16 *feature_code;
1da177e4
LT		 699 int ret;
700
fce53847 701 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 702
703 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
704 cgc.cmd[3] = CDF_HWDM;
fce53847 705 cgc.cmd[8] = sizeof(buffer);
1da177e4
LT		 706 cgc.quiet = 1;
707
708 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
fce53847 709 return ret;
1da177e4 710
56052d52 711 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
1da177e4 712 if (be16_to_cpu(*feature_code) == CDF_HWDM)
fce53847
FT		 713 return 0;
714
715 return 1;
1da177e4
LT		 716}
717
718
719static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
720{
721 struct rwrt_feature_desc rfd;
722 int ret;
723
724 *write = 0;
725
726 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
727 return ret;
728
729 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
730 *write = 1;
731
732 return 0;
733}
734
735static int cdrom_media_erasable(struct cdrom_device_info *cdi)
736{
737 disc_information di;
738 int ret;
739
740 ret = cdrom_get_disc_info(cdi, &di);
741 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
742 return -1;
743
744 return di.erasable;
745}
746
747/*
748 * FIXME: check RO bit
749 */
750static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
751{
752 int ret = cdrom_media_erasable(cdi);
753
754 /*
755 * allow writable open if media info read worked and media is
756 * erasable, _or_ if it fails since not all drives support it
757 */
758 if (!ret)
759 return 1;
760
761 return 0;
762}
763
764static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
765{
766 disc_information di;
767 int ret;
768
769 /*
770 * always reset to DMA lba space on open
771 */
772 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
e597cd09 773 pr_err("failed setting lba address space\n");
1da177e4
LT		 774 return 1;
775 }
776
777 ret = cdrom_get_disc_info(cdi, &di);
778 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
779 return 1;
780
781 if (!di.erasable)
782 return 1;
783
784 /*
785 * mrw_status
786 * 0 - not MRW formatted
787 * 1 - MRW bgformat started, but not running or complete
788 * 2 - MRW bgformat in progress
789 * 3 - MRW formatting complete
790 */
791 ret = 0;
e597cd09 792 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
1da177e4
LT		 793 if (!di.mrw_status)
794 ret = 1;
795 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
796 mrw_format_restart)
797 ret = cdrom_mrw_bgformat(cdi, 1);
798
799 return ret;
800}
801
802static int mo_open_write(struct cdrom_device_info *cdi)
803{
804 struct packet_command cgc;
fce53847 805 char buffer[255];
1da177e4
LT		 806 int ret;
807
fce53847 808 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
1da177e4
LT		 809 cgc.quiet = 1;
810
811 /*
812 * obtain write protect information as per
813 * drivers/scsi/sd.c:sd_read_write_protect_flag
814 */
815
816 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
817 if (ret)
818 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
819 if (ret) {
820 cgc.buflen = 255;
821 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
822 }
823
824 /* drive gave us no info, let the user go ahead */
fce53847
FT		 825 if (ret)
826 return 0;
1da177e4 827
fce53847 828 return buffer[3] & 0x80;
1da177e4
LT		 829}
830
831static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
832{
833 struct rwrt_feature_desc rfd;
834 int ret;
835
836 if ((ret = cdrom_has_defect_mgt(cdi)))
837 return ret;
838
839 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
840 return ret;
841 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
842 ret = !rfd.curr;
843
844 cdinfo(CD_OPEN, "can open for random write\n");
845 return ret;
846}
847
848static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
849{
850 struct packet_command cgc;
fce53847 851 char buffer[32];
1da177e4
LT		 852 int ret, mmc3_profile;
853
fce53847 854 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
1da177e4
LT		 855
856 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
857 cgc.cmd[1] = 0;
858 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
fce53847 859 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
1da177e4
LT		 860 cgc.quiet = 1;
861
862 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
863 mmc3_profile = 0xffff;
864 else
865 mmc3_profile = (buffer[6] << 8) | buffer[7];
866
867 cdi->mmc3_profile = mmc3_profile;
868}
869
870static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
871{
872 switch (cdi->mmc3_profile) {
873 case 0x12: /* DVD-RAM */
874 case 0x1A: /* DVD+RW */
875 return 0;
876 default:
877 return 1;
878 }
879}
880
881/*
882 * returns 0 for ok to open write, non-0 to disallow
883 */
884static int cdrom_open_write(struct cdrom_device_info *cdi)
885{
886 int mrw, mrw_write, ram_write;
887 int ret = 1;
888
889 mrw = 0;
890 if (!cdrom_is_mrw(cdi, &mrw_write))
891 mrw = 1;
892
893 if (CDROM_CAN(CDC_MO_DRIVE))
894 ram_write = 1;
895 else
896 (void) cdrom_is_random_writable(cdi, &ram_write);
897
898 if (mrw)
899 cdi->mask &= ~CDC_MRW;
900 else
901 cdi->mask |= CDC_MRW;
902
903 if (mrw_write)
904 cdi->mask &= ~CDC_MRW_W;
905 else
906 cdi->mask |= CDC_MRW_W;
907
908 if (ram_write)
909 cdi->mask &= ~CDC_RAM;
910 else
911 cdi->mask |= CDC_RAM;
912
913 if (CDROM_CAN(CDC_MRW_W))
914 ret = cdrom_mrw_open_write(cdi);
915 else if (CDROM_CAN(CDC_DVD_RAM))
916 ret = cdrom_dvdram_open_write(cdi);
917 else if (CDROM_CAN(CDC_RAM) &&
918 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
919 ret = cdrom_ram_open_write(cdi);
920 else if (CDROM_CAN(CDC_MO_DRIVE))
921 ret = mo_open_write(cdi);
922 else if (!cdrom_is_dvd_rw(cdi))
923 ret = 0;
924
925 return ret;
926}
927
928static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
929{
930 struct packet_command cgc;
931
932 if (cdi->mmc3_profile != 0x1a) {
933 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
934 return;
935 }
936
937 if (!cdi->media_written) {
938 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
939 return;
940 }
941
e597cd09 942 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
1da177e4
LT		 943
944 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
945 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
946 cgc.timeout = 30*HZ;
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.timeout = 3000*HZ;
952 cgc.quiet = 1;
953 cdi->ops->generic_packet(cdi, &cgc);
954
955 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
956 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
957 cgc.cmd[2] = 2; /* Close session */
958 cgc.quiet = 1;
959 cgc.timeout = 3000*HZ;
960 cdi->ops->generic_packet(cdi, &cgc);
961
962 cdi->media_written = 0;
963}
964
965static int cdrom_close_write(struct cdrom_device_info *cdi)
966{
967#if 0
968 return cdrom_flush_cache(cdi);
969#else
970 return 0;
971#endif
972}
973
974/* We use the open-option O_NONBLOCK to indicate that the
975 * purpose of opening is only for subsequent ioctl() calls; no device
976 * integrity checks are performed.
977 *
978 * We hope that all cd-player programs will adopt this convention. It
979 * is in their own interest: device control becomes a lot easier
980 * this way.
981 */
bbc1cc97 982int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode)
1da177e4
LT		 983{
984 int ret;
985
986 cdinfo(CD_OPEN, "entering cdrom_open\n");
987
988 /* if this was a O_NONBLOCK open and we should honor the flags,
989 * do a quick open without drive/disc integrity checks. */
990 cdi->use_count++;
bbc1cc97 991 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1da177e4
LT		 992 ret = cdi->ops->open(cdi, 1);
993 } else {
994 ret = open_for_data(cdi);
995 if (ret)
996 goto err;
997 cdrom_mmc3_profile(cdi);
bbc1cc97 998 if (mode & FMODE_WRITE) {
1da177e4
LT		 999 ret = -EROFS;
1000 if (cdrom_open_write(cdi))
16070428 1001 goto err_release;
1da177e4 1002 if (!CDROM_CAN(CDC_RAM))
16070428 1003 goto err_release;
1da177e4
LT		 1004 ret = 0;
1005 cdi->media_written = 0;
1006 }
1007 }
1008
1009 if (ret)
1010 goto err;
1011
1012 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1013 cdi->name, cdi->use_count);
1014 /* Do this on open. Don't wait for mount, because they might
1015 not be mounting, but opening with O_NONBLOCK */
bbc1cc97 1016 check_disk_change(bdev);
1da177e4 1017 return 0;
16070428 1018err_release:
ae3ba4fd
AV		 1019 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1020 cdi->ops->lock_door(cdi, 0);
1021 cdinfo(CD_OPEN, "door unlocked.\n");
1022 }
16070428 1023 cdi->ops->release(cdi);
1da177e4
LT		 1024err:
1025 cdi->use_count--;
1026 return ret;
1027}
1028
1029static
1030int open_for_data(struct cdrom_device_info * cdi)
1031{
1032 int ret;
1033 struct cdrom_device_ops *cdo = cdi->ops;
1034 tracktype tracks;
1035 cdinfo(CD_OPEN, "entering open_for_data\n");
1036 /* Check if the driver can report drive status. If it can, we
1037 can do clever things. If it can't, well, we at least tried! */
1038 if (cdo->drive_status != NULL) {
1039 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1040 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1041 if (ret == CDS_TRAY_OPEN) {
1042 cdinfo(CD_OPEN, "the tray is open...\n");
1043 /* can/may i close it? */
1044 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1045 cdi->options & CDO_AUTO_CLOSE) {
1046 cdinfo(CD_OPEN, "trying to close the tray.\n");
1047 ret=cdo->tray_move(cdi,0);
1048 if (ret) {
1049 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1050 /* Ignore the error from the low
1051 level driver. We don't care why it
1052 couldn't close the tray. We only care
1053 that there is no disc in the drive,
1054 since that is the _REAL_ problem here.*/
1055 ret=-ENOMEDIUM;
1056 goto clean_up_and_return;
1057 }
1058 } else {
1059 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n");
1060 ret=-ENOMEDIUM;
1061 goto clean_up_and_return;
1062 }
1063 /* Ok, the door should be closed now.. Check again */
1064 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1065 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1066 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1067 cdinfo(CD_OPEN, "tray might not contain a medium.\n");
1068 ret=-ENOMEDIUM;
1069 goto clean_up_and_return;
1070 }
1071 cdinfo(CD_OPEN, "the tray is now closed.\n");
1072 }
1073 /* the door should be closed now, check for the disc */
1074 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1075 if (ret!=CDS_DISC_OK) {
1076 ret = -ENOMEDIUM;
1077 goto clean_up_and_return;
1078 }
1079 }
1080 cdrom_count_tracks(cdi, &tracks);
1081 if (tracks.error == CDS_NO_DISC) {
1082 cdinfo(CD_OPEN, "bummer. no disc.\n");
1083 ret=-ENOMEDIUM;
1084 goto clean_up_and_return;
1085 }
1086 /* CD-Players which don't use O_NONBLOCK, workman
1087 * for example, need bit CDO_CHECK_TYPE cleared! */
1088 if (tracks.data==0) {
1089 if (cdi->options & CDO_CHECK_TYPE) {
1090 /* give people a warning shot, now that CDO_CHECK_TYPE
1091 is the default case! */
1092 cdinfo(CD_OPEN, "bummer. wrong media type.\n");
1093 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
ba25f9dc 1094 (unsigned int)task_pid_nr(current));
1da177e4
LT		 1095 ret=-EMEDIUMTYPE;
1096 goto clean_up_and_return;
1097 }
1098 else {
1099 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n");
1100 }
1101 }
1102
1103 cdinfo(CD_OPEN, "all seems well, opening the device.\n");
1104
1105 /* all seems well, we can open the device */
1106 ret = cdo->open(cdi, 0); /* open for data */
1107 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret);
1108 /* After all this careful checking, we shouldn't have problems
1109 opening the device, but we don't want the device locked if
1110 this somehow fails... */
1111 if (ret) {
1112 cdinfo(CD_OPEN, "open device failed.\n");
1113 goto clean_up_and_return;
1114 }
1115 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1116 cdo->lock_door(cdi, 1);
1117 cdinfo(CD_OPEN, "door locked.\n");
1118 }
1119 cdinfo(CD_OPEN, "device opened successfully.\n");
1120 return ret;
1121
1122 /* Something failed. Try to unlock the drive, because some drivers
1123 (notably ide-cd) lock the drive after every command. This produced
1124 a nasty bug where after mount failed, the drive would remain locked!
1125 This ensures that the drive gets unlocked after a mount fails. This
1126 is a goto to avoid bloating the driver with redundant code. */
1127clean_up_and_return:
00d6da9b 1128 cdinfo(CD_OPEN, "open failed.\n");
1da177e4
LT		 1129 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1130 cdo->lock_door(cdi, 0);
1131 cdinfo(CD_OPEN, "door unlocked.\n");
1132 }
1133 return ret;
1134}
1135
1136/* This code is similar to that in open_for_data. The routine is called
1137 whenever an audio play operation is requested.
1138*/
ecb80c6a
AB		 1139static int check_for_audio_disc(struct cdrom_device_info * cdi,
1140 struct cdrom_device_ops * cdo)
1da177e4
LT		 1141{
1142 int ret;
1143 tracktype tracks;
1144 cdinfo(CD_OPEN, "entering check_for_audio_disc\n");
1145 if (!(cdi->options & CDO_CHECK_TYPE))
1146 return 0;
1147 if (cdo->drive_status != NULL) {
1148 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1149 cdinfo(CD_OPEN, "drive_status=%d\n", ret);
1150 if (ret == CDS_TRAY_OPEN) {
1151 cdinfo(CD_OPEN, "the tray is open...\n");
1152 /* can/may i close it? */
1153 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1154 cdi->options & CDO_AUTO_CLOSE) {
1155 cdinfo(CD_OPEN, "trying to close the tray.\n");
1156 ret=cdo->tray_move(cdi,0);
1157 if (ret) {
1158 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n");
1159 /* Ignore the error from the low
1160 level driver. We don't care why it
1161 couldn't close the tray. We only care
1162 that there is no disc in the drive,
1163 since that is the _REAL_ problem here.*/
1164 return -ENOMEDIUM;
1165 }
1166 } else {
1167 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n");
1168 return -ENOMEDIUM;
1169 }
1170 /* Ok, the door should be closed now.. Check again */
1171 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1172 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1173 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n");
1174 return -ENOMEDIUM;
1175 }
1176 if (ret!=CDS_DISC_OK) {
1177 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n");
1178 return -EIO;
1179 }
1180 cdinfo(CD_OPEN, "the tray is now closed.\n");
1181 }
1182 }
1183 cdrom_count_tracks(cdi, &tracks);
1184 if (tracks.error)
1185 return(tracks.error);
1186
1187 if (tracks.audio==0)
1188 return -EMEDIUMTYPE;
1189
1190 return 0;
1191}
1192
bbc1cc97 1193void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1da177e4
LT		 1194{
1195 struct cdrom_device_ops *cdo = cdi->ops;
1196 int opened_for_data;
1197
35841f70 1198 cdinfo(CD_CLOSE, "entering cdrom_release\n");
1da177e4
LT		 1199
1200 if (cdi->use_count > 0)
1201 cdi->use_count--;
35841f70
BP		 1202
1203 if (cdi->use_count == 0) {
1da177e4 1204 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name);
1da177e4 1205 cdrom_dvd_rw_close_write(cdi);
35841f70
BP		 1206
1207 if ((cdo->capability & CDC_LOCK) && !keeplocked) {
1208 cdinfo(CD_CLOSE, "Unlocking door!\n");
1209 cdo->lock_door(cdi, 0);
1210 }
1da177e4 1211 }
35841f70 1212
1da177e4 1213 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
bbc1cc97 1214 !(mode & FMODE_NDELAY);
1da177e4
LT		 1215
1216 /*
1217 * flush cache on last write release
1218 */
1219 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1220 cdrom_close_write(cdi);
1221
1222 cdo->release(cdi);
1223 if (cdi->use_count == 0) { /* last process that closes dev*/
1224 if (opened_for_data &&
1225 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1226 cdo->tray_move(cdi, 1);
1227 }
1da177e4
LT		 1228}
1229
1230static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1231 struct cdrom_changer_info *buf)
1232{
1233 struct packet_command cgc;
1234 struct cdrom_device_ops *cdo = cdi->ops;
1235 int length;
1236
1237 /*
1238 * Sanyo changer isn't spec compliant (doesn't use regular change
1239 * LOAD_UNLOAD command, and it doesn't implement the mech status
1240 * command below
1241 */
1242 if (cdi->sanyo_slot) {
1243 buf->hdr.nslots = 3;
1244 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1245 for (length = 0; length < 3; length++) {
1246 buf->slots[length].disc_present = 1;
1247 buf->slots[length].change = 0;
1248 }
1249 return 0;
1250 }
1251
1252 length = sizeof(struct cdrom_mechstat_header) +
1253 cdi->capacity * sizeof(struct cdrom_slot);
1254
1255 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1256 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1257 cgc.cmd[8] = (length >> 8) & 0xff;
1258 cgc.cmd[9] = length & 0xff;
1259 return cdo->generic_packet(cdi, &cgc);
1260}
1261
1262static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1263{
1264 struct cdrom_changer_info *info;
1265 int ret;
1266
1267 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n");
1268 if (cdi->sanyo_slot)
1269 return CDS_NO_INFO;
1270
1271 info = kmalloc(sizeof(*info), GFP_KERNEL);
1272 if (!info)
1273 return -ENOMEM;
1274
1275 if ((ret = cdrom_read_mech_status(cdi, info)))
1276 goto out_free;
1277
1278 if (info->slots[slot].disc_present)
1279 ret = CDS_DISC_OK;
1280 else
1281 ret = CDS_NO_DISC;
1282
1283out_free:
1284 kfree(info);
1285 return ret;
1286}
1287
1288/* Return the number of slots for an ATAPI/SCSI cdrom,
1289 * return 1 if not a changer.
1290 */
1291int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1292{
1293 int status;
1294 int nslots = 1;
1295 struct cdrom_changer_info *info;
1296
1297 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1298 /* cdrom_read_mech_status requires a valid value for capacity: */
1299 cdi->capacity = 0;
1300
1301 info = kmalloc(sizeof(*info), GFP_KERNEL);
1302 if (!info)
1303 return -ENOMEM;
1304
1305 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1306 nslots = info->hdr.nslots;
1307
1308 kfree(info);
1309 return nslots;
1310}
1311
1312
1313/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1314static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1315{
1316 struct packet_command cgc;
1317
1318 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n");
1319 if (cdi->sanyo_slot && slot < 0)
1320 return 0;
1321
1322 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1323 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1324 cgc.cmd[4] = 2 + (slot >= 0);
1325 cgc.cmd[8] = slot;
1326 cgc.timeout = 60 * HZ;
1327
1328 /* The Sanyo 3 CD changer uses byte 7 of the
1329 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1330 using the GPCMD_LOAD_UNLOAD opcode. */
1331 if (cdi->sanyo_slot && -1 < slot) {
1332 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1333 cgc.cmd[7] = slot;
1334 cgc.cmd[4] = cgc.cmd[8] = 0;
1335 cdi->sanyo_slot = slot ? slot : 3;
1336 }
1337
1338 return cdi->ops->generic_packet(cdi, &cgc);
1339}
1340
1341static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1342{
1343 struct cdrom_changer_info *info;
1344 int curslot;
1345 int ret;
1346
1347 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n");
1348 if (!CDROM_CAN(CDC_SELECT_DISC))
1349 return -EDRIVE_CANT_DO_THIS;
1350
2d921729
TH		 1351 if (cdi->ops->check_events)
1352 cdi->ops->check_events(cdi, 0, slot);
1353 else
1354 cdi->ops->media_changed(cdi, slot);
1da177e4
LT		 1355
1356 if (slot == CDSL_NONE) {
1357 /* set media changed bits, on both queues */
1358 cdi->mc_flags = 0x3;
1359 return cdrom_load_unload(cdi, -1);
1360 }
1361
1362 info = kmalloc(sizeof(*info), GFP_KERNEL);
1363 if (!info)
1364 return -ENOMEM;
1365
1366 if ((ret = cdrom_read_mech_status(cdi, info))) {
1367 kfree(info);
1368 return ret;
1369 }
1370
1371 curslot = info->hdr.curslot;
1372 kfree(info);
1373
1374 if (cdi->use_count > 1 || keeplocked) {
1375 if (slot == CDSL_CURRENT) {
1376 return curslot;
1377 } else {
1378 return -EBUSY;
1379 }
1380 }
1381
1382 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1383 which is useful if it had been previously unloaded.
1384 Whether it can or not, it returns the current slot.
1385 Similarly, if slot happens to be the current one, we still
1386 try and load it. */
1387 if (slot == CDSL_CURRENT)
1388 slot = curslot;
1389
1390 /* set media changed bits on both queues */
1391 cdi->mc_flags = 0x3;
1392 if ((ret = cdrom_load_unload(cdi, slot)))
1393 return ret;
1394
1395 return slot;
1396}
1397
2d921729
TH		 1398/*
1399 * As cdrom implements an extra ioctl consumer for media changed
1400 * event, it needs to buffer ->check_events() output, such that event
1401 * is not lost for both the usual VFS and ioctl paths.
1402 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1403 * path.
1404 *
1405 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1406 * called in parallel and buffering fields are accessed without any
1407 * exclusion. The original media_changed code had the same problem.
1408 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1409 * and remove this cruft altogether. It doesn't have much usefulness
1410 * at this point.
1411 */
1412static void cdrom_update_events(struct cdrom_device_info *cdi,
1413 unsigned int clearing)
1414{
1415 unsigned int events;
1416
1417 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1418 cdi->vfs_events |= events;
1419 cdi->ioctl_events |= events;
1420}
1421
1422unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1423 unsigned int clearing)
1424{
1425 unsigned int events;
1426
1427 cdrom_update_events(cdi, clearing);
1428 events = cdi->vfs_events;
1429 cdi->vfs_events = 0;
1430 return events;
1431}
30a7caab 1432EXPORT_SYMBOL(cdrom_check_events);
2d921729 1433
1da177e4
LT		 1434/* We want to make media_changed accessible to the user through an
1435 * ioctl. The main problem now is that we must double-buffer the
1436 * low-level implementation, to assure that the VFS and the user both
1437 * see a medium change once.
1438 */
1439
1440static
1441int media_changed(struct cdrom_device_info *cdi, int queue)
1442{
1443 unsigned int mask = (1 << (queue & 1));
1444 int ret = !!(cdi->mc_flags & mask);
2d921729 1445 bool changed;
1da177e4
LT		 1446
1447 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2d921729
TH		 1448 return ret;
1449
1da177e4 1450 /* changed since last call? */
2d921729
TH		 1451 if (cdi->ops->check_events) {
1452 BUG_ON(!queue); /* shouldn't be called from VFS path */
1453 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1454 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1455 cdi->ioctl_events = 0;
1456 } else
1457 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1458
1459 if (changed) {
1da177e4
LT		 1460 cdi->mc_flags = 0x3; /* set bit on both queues */
1461 ret |= 1;
1462 cdi->media_written = 0;
1463 }
2d921729 1464
1da177e4
LT		 1465 cdi->mc_flags &= ~mask; /* clear bit */
1466 return ret;
1467}
1468
1469int cdrom_media_changed(struct cdrom_device_info *cdi)
1470{
1471 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1472 * Returning "0" is always safe (media hasn't been changed). Do that
1473 * if the low-level cdrom driver dosn't support media changed. */
1474 if (cdi == NULL || cdi->ops->media_changed == NULL)
1475 return 0;
1476 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1477 return 0;
1478 return media_changed(cdi, 0);
1479}
1480
1481/* badly broken, I know. Is due for a fixup anytime. */
1482static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1483{
1484 struct cdrom_tochdr header;
1485 struct cdrom_tocentry entry;
1486 int ret, i;
1487 tracks->data=0;
1488 tracks->audio=0;
1489 tracks->cdi=0;
1490 tracks->xa=0;
1491 tracks->error=0;
1492 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1da177e4
LT		 1493 /* Grab the TOC header so we can see how many tracks there are */
1494 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1495 if (ret == -ENOMEDIUM)
1496 tracks->error = CDS_NO_DISC;
1497 else
1498 tracks->error = CDS_NO_INFO;
1499 return;
1500 }
1501 /* check what type of tracks are on this disc */
1502 entry.cdte_format = CDROM_MSF;
1503 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1504 entry.cdte_track = i;
1505 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1506 tracks->error=CDS_NO_INFO;
1507 return;
1508 }
1509 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1510 if (entry.cdte_format == 0x10)
1511 tracks->cdi++;
1512 else if (entry.cdte_format == 0x20)
1513 tracks->xa++;
1514 else
1515 tracks->data++;
1516 } else
1517 tracks->audio++;
1518 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1519 i, entry.cdte_format, entry.cdte_ctrl);
1520 }
1521 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1522 header.cdth_trk1, tracks->audio, tracks->data,
1523 tracks->cdi, tracks->xa);
1524}
1525
1526/* Requests to the low-level drivers will /always/ be done in the
1527 following format convention:
1528
1529 CDROM_LBA: all data-related requests.
1530 CDROM_MSF: all audio-related requests.
1531
1532 However, a low-level implementation is allowed to refuse this
1533 request, and return information in its own favorite format.
1534
1535 It doesn't make sense /at all/ to ask for a play_audio in LBA
1536 format, or ask for multi-session info in MSF format. However, for
1537 backward compatibility these format requests will be satisfied, but
1538 the requests to the low-level drivers will be sanitized in the more
1539 meaningful format indicated above.
1540 */
1541
1542static
1543void sanitize_format(union cdrom_addr *addr,
1544 u_char * curr, u_char requested)
1545{
1546 if (*curr == requested)
1547 return; /* nothing to be done! */
1548 if (requested == CDROM_LBA) {
1549 addr->lba = (int) addr->msf.frame +
1550 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1551 } else { /* CDROM_MSF */
1552 int lba = addr->lba;
1553 addr->msf.frame = lba % 75;
1554 lba /= 75;
1555 lba += 2;
1556 addr->msf.second = lba % 60;
1557 addr->msf.minute = lba / 60;
1558 }
1559 *curr = requested;
1560}
1561
1562void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1563 int type)
1564{
1565 memset(cgc, 0, sizeof(struct packet_command));
1566 if (buf)
1567 memset(buf, 0, len);
1568 cgc->buffer = (char *) buf;
1569 cgc->buflen = len;
1570 cgc->data_direction = type;
2e11c207 1571 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1572}
1573
1574/* DVD handling */
1575
1576#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1577#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1578
1579static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1580{
1581 cgc->cmd[0] = GPCMD_REPORT_KEY;
1582 cgc->cmd[10] = type | (agid << 6);
1583 switch (type) {
1584 case 0: case 8: case 5: {
1585 cgc->buflen = 8;
1586 break;
1587 }
1588 case 1: {
1589 cgc->buflen = 16;
1590 break;
1591 }
1592 case 2: case 4: {
1593 cgc->buflen = 12;
1594 break;
1595 }
1596 }
1597 cgc->cmd[9] = cgc->buflen;
1598 cgc->data_direction = CGC_DATA_READ;
1599}
1600
1601static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1602{
1603 cgc->cmd[0] = GPCMD_SEND_KEY;
1604 cgc->cmd[10] = type | (agid << 6);
1605 switch (type) {
1606 case 1: {
1607 cgc->buflen = 16;
1608 break;
1609 }
1610 case 3: {
1611 cgc->buflen = 12;
1612 break;
1613 }
1614 case 6: {
1615 cgc->buflen = 8;
1616 break;
1617 }
1618 }
1619 cgc->cmd[9] = cgc->buflen;
1620 cgc->data_direction = CGC_DATA_WRITE;
1621}
1622
1623static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1624{
1625 int ret;
fce53847 1626 u_char buf[20];
1da177e4
LT		 1627 struct packet_command cgc;
1628 struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1629 rpc_state_t rpc_state;
1da177e4 1630
fce53847 1631 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1632 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1633
1634 switch (ai->type) {
1635 /* LU data send */
1636 case DVD_LU_SEND_AGID:
1637 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1638 cgc.quiet = 1;
1639 setup_report_key(&cgc, ai->lsa.agid, 0);
1640
1641 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1642 return ret;
1da177e4
LT		 1643
1644 ai->lsa.agid = buf[7] >> 6;
1645 /* Returning data, let host change state */
1646 break;
1647
1648 case DVD_LU_SEND_KEY1:
1649 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1650 setup_report_key(&cgc, ai->lsk.agid, 2);
1651
1652 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1653 return ret;
1da177e4
LT		 1654
1655 copy_key(ai->lsk.key, &buf[4]);
1656 /* Returning data, let host change state */
1657 break;
1658
1659 case DVD_LU_SEND_CHALLENGE:
1660 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1661 setup_report_key(&cgc, ai->lsc.agid, 1);
1662
1663 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1664 return ret;
1da177e4
LT		 1665
1666 copy_chal(ai->lsc.chal, &buf[4]);
1667 /* Returning data, let host change state */
1668 break;
1669
1670 /* Post-auth key */
1671 case DVD_LU_SEND_TITLE_KEY:
1672 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1673 cgc.quiet = 1;
1674 setup_report_key(&cgc, ai->lstk.agid, 4);
1675 cgc.cmd[5] = ai->lstk.lba;
1676 cgc.cmd[4] = ai->lstk.lba >> 8;
1677 cgc.cmd[3] = ai->lstk.lba >> 16;
1678 cgc.cmd[2] = ai->lstk.lba >> 24;
1679
1680 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1681 return ret;
1da177e4
LT		 1682
1683 ai->lstk.cpm = (buf[4] >> 7) & 1;
1684 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1685 ai->lstk.cgms = (buf[4] >> 4) & 3;
1686 copy_key(ai->lstk.title_key, &buf[5]);
1687 /* Returning data, let host change state */
1688 break;
1689
1690 case DVD_LU_SEND_ASF:
1691 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1692 setup_report_key(&cgc, ai->lsasf.agid, 5);
1693
1694 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1695 return ret;
1da177e4
LT		 1696
1697 ai->lsasf.asf = buf[7] & 1;
1698 break;
1699
1700 /* LU data receive (LU changes state) */
1701 case DVD_HOST_SEND_CHALLENGE:
1702 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1703 setup_send_key(&cgc, ai->hsc.agid, 1);
1704 buf[1] = 0xe;
1705 copy_chal(&buf[4], ai->hsc.chal);
1706
1707 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1708 return ret;
1da177e4
LT		 1709
1710 ai->type = DVD_LU_SEND_KEY1;
1711 break;
1712
1713 case DVD_HOST_SEND_KEY2:
1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1715 setup_send_key(&cgc, ai->hsk.agid, 3);
1716 buf[1] = 0xa;
1717 copy_key(&buf[4], ai->hsk.key);
1718
1719 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1720 ai->type = DVD_AUTH_FAILURE;
fce53847 1721 return ret;
1da177e4
LT		 1722 }
1723 ai->type = DVD_AUTH_ESTABLISHED;
1724 break;
1725
1726 /* Misc */
1727 case DVD_INVALIDATE_AGID:
1728 cgc.quiet = 1;
1729 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1730 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1731 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1732 return ret;
1da177e4
LT		 1733 break;
1734
1735 /* Get region settings */
1736 case DVD_LU_SEND_RPC_STATE:
1737 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1738 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1739 memset(&rpc_state, 0, sizeof(rpc_state_t));
1740 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1741
1742 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1743 return ret;
1da177e4 1744
fce53847
FT		 1745 ai->lrpcs.type = rpc_state.type_code;
1746 ai->lrpcs.vra = rpc_state.vra;
1747 ai->lrpcs.ucca = rpc_state.ucca;
1748 ai->lrpcs.region_mask = rpc_state.region_mask;
1749 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1750 break;
1751
1752 /* Set region settings */
1753 case DVD_HOST_SEND_RPC_STATE:
1754 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1755 setup_send_key(&cgc, 0, 6);
1756 buf[1] = 6;
1757 buf[4] = ai->hrpcs.pdrc;
1758
1759 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1760 return ret;
1da177e4
LT		 1761 break;
1762
1763 default:
1764 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1765 return -ENOTTY;
1da177e4 1766 }
fce53847
FT		 1767
1768 return 0;
1da177e4
LT		 1769}
1770
d194139c
MS		 1771static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1772 struct packet_command *cgc)
1da177e4 1773{
fce53847 1774 unsigned char buf[21], *base;
1da177e4 1775 struct dvd_layer *layer;
1da177e4
LT		 1776 struct cdrom_device_ops *cdo = cdi->ops;
1777 int ret, layer_num = s->physical.layer_num;
1778
1779 if (layer_num >= DVD_LAYERS)
1780 return -EINVAL;
1781
d194139c
MS		 1782 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1783 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1784 cgc->cmd[6] = layer_num;
1785 cgc->cmd[7] = s->type;
1786 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4
LT		 1787
1788 /*
1789 * refrain from reporting errors on non-existing layers (mainly)
1790 */
d194139c 1791 cgc->quiet = 1;
1da177e4 1792
d194139c
MS		 1793 ret = cdo->generic_packet(cdi, cgc);
1794 if (ret)
fce53847 1795 return ret;
1da177e4
LT		 1796
1797 base = &buf[4];
1798 layer = &s->physical.layer[layer_num];
1799
1800 /*
1801 * place the data... really ugly, but at least we won't have to
1802 * worry about endianess in userspace.
1803 */
1804 memset(layer, 0, sizeof(*layer));
1805 layer->book_version = base[0] & 0xf;
1806 layer->book_type = base[0] >> 4;
1807 layer->min_rate = base[1] & 0xf;
1808 layer->disc_size = base[1] >> 4;
1809 layer->layer_type = base[2] & 0xf;
1810 layer->track_path = (base[2] >> 4) & 1;
1811 layer->nlayers = (base[2] >> 5) & 3;
1812 layer->track_density = base[3] & 0xf;
1813 layer->linear_density = base[3] >> 4;
1814 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1815 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1816 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1817 layer->bca = base[16] >> 7;
1818
fce53847 1819 return 0;
1da177e4
LT		 1820}
1821
d194139c
MS		 1822static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1823 struct packet_command *cgc)
1da177e4
LT		 1824{
1825 int ret;
fce53847 1826 u_char buf[8];
1da177e4
LT		 1827 struct cdrom_device_ops *cdo = cdi->ops;
1828
d194139c
MS		 1829 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1830 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1831 cgc->cmd[6] = s->copyright.layer_num;
1832 cgc->cmd[7] = s->type;
1833 cgc->cmd[8] = cgc->buflen >> 8;
1834 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4 1835
d194139c
MS		 1836 ret = cdo->generic_packet(cdi, cgc);
1837 if (ret)
fce53847 1838 return ret;
1da177e4
LT		 1839
1840 s->copyright.cpst = buf[4];
1841 s->copyright.rmi = buf[5];
1842
fce53847 1843 return 0;
1da177e4
LT		 1844}
1845
d194139c
MS		 1846static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1847 struct packet_command *cgc)
1da177e4
LT		 1848{
1849 int ret, size;
1850 u_char *buf;
1da177e4
LT		 1851 struct cdrom_device_ops *cdo = cdi->ops;
1852
1853 size = sizeof(s->disckey.value) + 4;
1854
d194139c
MS		 1855 buf = kmalloc(size, GFP_KERNEL);
1856 if (!buf)
1da177e4
LT		 1857 return -ENOMEM;
1858
d194139c
MS		 1859 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1860 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1861 cgc->cmd[7] = s->type;
1862 cgc->cmd[8] = size >> 8;
1863 cgc->cmd[9] = size & 0xff;
1864 cgc->cmd[10] = s->disckey.agid << 6;
1da177e4 1865
d194139c
MS		 1866 ret = cdo->generic_packet(cdi, cgc);
1867 if (!ret)
1da177e4
LT		 1868 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1869
1870 kfree(buf);
1871 return ret;
1872}
1873
d194139c
MS		 1874static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1875 struct packet_command *cgc)
1da177e4 1876{
d194139c
MS		 1877 int ret, size = 4 + 188;
1878 u_char *buf;
1da177e4
LT		 1879 struct cdrom_device_ops *cdo = cdi->ops;
1880
d194139c
MS		 1881 buf = kmalloc(size, GFP_KERNEL);
1882 if (!buf)
1883 return -ENOMEM;
1da177e4 1884
d194139c
MS		 1885 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1886 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1887 cgc->cmd[7] = s->type;
1888 cgc->cmd[9] = cgc->buflen & 0xff;
1889
1890 ret = cdo->generic_packet(cdi, cgc);
1891 if (ret)
1892 goto out;
1da177e4
LT		 1893
1894 s->bca.len = buf[0] << 8 | buf[1];
1895 if (s->bca.len < 12 || s->bca.len > 188) {
1896 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
d194139c
MS		 1897 ret = -EIO;
1898 goto out;
1da177e4
LT		 1899 }
1900 memcpy(s->bca.value, &buf[4], s->bca.len);
d194139c
MS		 1901 ret = 0;
1902out:
1903 kfree(buf);
1904 return ret;
1da177e4
LT		 1905}
1906
d194139c
MS		 1907static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1908 struct packet_command *cgc)
1da177e4
LT		 1909{
1910 int ret = 0, size;
1911 u_char *buf;
1da177e4
LT		 1912 struct cdrom_device_ops *cdo = cdi->ops;
1913
1914 size = sizeof(s->manufact.value) + 4;
1915
d194139c
MS		 1916 buf = kmalloc(size, GFP_KERNEL);
1917 if (!buf)
1da177e4
LT		 1918 return -ENOMEM;
1919
d194139c
MS		 1920 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1921 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1922 cgc->cmd[7] = s->type;
1923 cgc->cmd[8] = size >> 8;
1924 cgc->cmd[9] = size & 0xff;
1da177e4 1925
d194139c
MS		 1926 ret = cdo->generic_packet(cdi, cgc);
1927 if (ret)
1928 goto out;
1da177e4
LT		 1929
1930 s->manufact.len = buf[0] << 8 | buf[1];
1931 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1932 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1933 " (%d)\n", s->manufact.len);
1934 ret = -EIO;
1935 } else {
1936 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1937 }
1938
d194139c 1939out:
1da177e4
LT		 1940 kfree(buf);
1941 return ret;
1942}
1943
d194139c
MS		 1944static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1945 struct packet_command *cgc)
1da177e4
LT		 1946{
1947 switch (s->type) {
1948 case DVD_STRUCT_PHYSICAL:
d194139c 1949 return dvd_read_physical(cdi, s, cgc);
1da177e4
LT		 1950
1951 case DVD_STRUCT_COPYRIGHT:
d194139c 1952 return dvd_read_copyright(cdi, s, cgc);
1da177e4
LT		 1953
1954 case DVD_STRUCT_DISCKEY:
d194139c 1955 return dvd_read_disckey(cdi, s, cgc);
1da177e4
LT		 1956
1957 case DVD_STRUCT_BCA:
d194139c 1958 return dvd_read_bca(cdi, s, cgc);
1da177e4
LT		 1959
1960 case DVD_STRUCT_MANUFACT:
d194139c 1961 return dvd_read_manufact(cdi, s, cgc);
1da177e4
LT		 1962
1963 default:
1964 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1965 s->type);
1966 return -EINVAL;
1967 }
1968}
1969
1970int cdrom_mode_sense(struct cdrom_device_info *cdi,
1971 struct packet_command *cgc,
1972 int page_code, int page_control)
1973{
1974 struct cdrom_device_ops *cdo = cdi->ops;
1975
1976 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1977
1978 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1979 cgc->cmd[2] = page_code | (page_control << 6);
1980 cgc->cmd[7] = cgc->buflen >> 8;
1981 cgc->cmd[8] = cgc->buflen & 0xff;
1982 cgc->data_direction = CGC_DATA_READ;
1983 return cdo->generic_packet(cdi, cgc);
1984}
1985
1986int cdrom_mode_select(struct cdrom_device_info *cdi,
1987 struct packet_command *cgc)
1988{
1989 struct cdrom_device_ops *cdo = cdi->ops;
1990
1991 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1992 memset(cgc->buffer, 0, 2);
1993 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1994 cgc->cmd[1] = 0x10; /* PF */
1995 cgc->cmd[7] = cgc->buflen >> 8;
1996 cgc->cmd[8] = cgc->buflen & 0xff;
1997 cgc->data_direction = CGC_DATA_WRITE;
1998 return cdo->generic_packet(cdi, cgc);
1999}
2000
2001static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2002 struct cdrom_subchnl *subchnl, int mcn)
2003{
2004 struct cdrom_device_ops *cdo = cdi->ops;
2005 struct packet_command cgc;
fce53847 2006 char buffer[32];
1da177e4
LT		 2007 int ret;
2008
2009 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2010 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2011 cgc.cmd[1] = 2; /* MSF addressing */
2012 cgc.cmd[2] = 0x40; /* request subQ data */
2013 cgc.cmd[3] = mcn ? 2 : 1;
2014 cgc.cmd[8] = 16;
2015
2016 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 2017 return ret;
1da177e4
LT		 2018
2019 subchnl->cdsc_audiostatus = cgc.buffer[1];
2020 subchnl->cdsc_format = CDROM_MSF;
2021 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2022 subchnl->cdsc_trk = cgc.buffer[6];
2023 subchnl->cdsc_ind = cgc.buffer[7];
2024
2025 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2026 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2027 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2028 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2029 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2030 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2031
fce53847 2032 return 0;
1da177e4
LT		 2033}
2034
2035/*
2036 * Specific READ_10 interface
2037 */
2038static int cdrom_read_cd(struct cdrom_device_info *cdi,
2039 struct packet_command *cgc, int lba,
2040 int blocksize, int nblocks)
2041{
2042 struct cdrom_device_ops *cdo = cdi->ops;
2043
2044 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2045 cgc->cmd[0] = GPCMD_READ_10;
2046 cgc->cmd[2] = (lba >> 24) & 0xff;
2047 cgc->cmd[3] = (lba >> 16) & 0xff;
2048 cgc->cmd[4] = (lba >> 8) & 0xff;
2049 cgc->cmd[5] = lba & 0xff;
2050 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2051 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2052 cgc->cmd[8] = nblocks & 0xff;
2053 cgc->buflen = blocksize * nblocks;
2054 return cdo->generic_packet(cdi, cgc);
2055}
2056
2057/* very generic interface for reading the various types of blocks */
2058static int cdrom_read_block(struct cdrom_device_info *cdi,
2059 struct packet_command *cgc,
2060 int lba, int nblocks, int format, int blksize)
2061{
2062 struct cdrom_device_ops *cdo = cdi->ops;
2063
2064 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2065 cgc->cmd[0] = GPCMD_READ_CD;
2066 /* expected sector size - cdda,mode1,etc. */
2067 cgc->cmd[1] = format << 2;
2068 /* starting address */
2069 cgc->cmd[2] = (lba >> 24) & 0xff;
2070 cgc->cmd[3] = (lba >> 16) & 0xff;
2071 cgc->cmd[4] = (lba >> 8) & 0xff;
2072 cgc->cmd[5] = lba & 0xff;
2073 /* number of blocks */
2074 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2075 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2076 cgc->cmd[8] = nblocks & 0xff;
2077 cgc->buflen = blksize * nblocks;
2078
2079 /* set the header info returned */
2080 switch (blksize) {
2081 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2082 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2083 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2084 default : cgc->cmd[9] = 0x10;
2085 }
2086
2087 return cdo->generic_packet(cdi, cgc);
2088}
2089
2090static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2091 int lba, int nframes)
2092{
2093 struct packet_command cgc;
2094 int ret = 0;
2095 int nr;
2096
2097 cdi->last_sense = 0;
2098
2099 memset(&cgc, 0, sizeof(cgc));
2100
2101 /*
2102 * start with will ra.nframes size, back down if alloc fails
2103 */
2104 nr = nframes;
2105 do {
2106 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2107 if (cgc.buffer)
2108 break;
2109
2110 nr >>= 1;
2111 } while (nr);
2112
2113 if (!nr)
2114 return -ENOMEM;
2115
2116 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2117 ret = -EFAULT;
2118 goto out;
2119 }
2120
2121 cgc.data_direction = CGC_DATA_READ;
2122 while (nframes > 0) {
2123 if (nr > nframes)
2124 nr = nframes;
2125
2126 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2127 if (ret)
2128 break;
2129 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2130 ret = -EFAULT;
2131 break;
2132 }
2133 ubuf += CD_FRAMESIZE_RAW * nr;
2134 nframes -= nr;
2135 lba += nr;
2136 }
2137out:
2138 kfree(cgc.buffer);
2139 return ret;
2140}
2141
2142static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2143 int lba, int nframes)
2144{
165125e1 2145 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2146 struct request *rq;
2147 struct bio *bio;
2148 unsigned int len;
2149 int nr, ret = 0;
2150
2151 if (!q)
2152 return -ENXIO;
2153
2154 cdi->last_sense = 0;
2155
2156 while (nframes) {
2157 nr = nframes;
2158 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2159 nr = 1;
ae03bf63
MP		 2160 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2161 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
1da177e4
LT		 2162
2163 len = nr * CD_FRAMESIZE_RAW;
2164
febd7a5c
AB		 2165 rq = blk_get_request(q, READ, GFP_KERNEL);
2166 if (!rq) {
2167 ret = -ENOMEM;
2168 break;
2169 }
2170
152e283f 2171 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2172 if (ret) {
2173 blk_put_request(rq);
dd1cab95 2174 break;
febd7a5c 2175 }
1da177e4 2176
1da177e4
LT		 2177 rq->cmd[0] = GPCMD_READ_CD;
2178 rq->cmd[1] = 1 << 2;
2179 rq->cmd[2] = (lba >> 24) & 0xff;
2180 rq->cmd[3] = (lba >> 16) & 0xff;
2181 rq->cmd[4] = (lba >> 8) & 0xff;
2182 rq->cmd[5] = lba & 0xff;
2183 rq->cmd[6] = (nr >> 16) & 0xff;
2184 rq->cmd[7] = (nr >> 8) & 0xff;
2185 rq->cmd[8] = nr & 0xff;
2186 rq->cmd[9] = 0xf8;
2187
2188 rq->cmd_len = 12;
4aff5e23 2189 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2190 rq->timeout = 60 * HZ;
2191 bio = rq->bio;
2192
994ca9a1 2193 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2194 struct request_sense *s = rq->sense;
2195 ret = -EIO;
2196 cdi->last_sense = s->sense_key;
2197 }
2198
8e5cfc45 2199 if (blk_rq_unmap_user(bio))
1da177e4 2200 ret = -EFAULT;
febd7a5c 2201 blk_put_request(rq);
1da177e4
LT		 2202
2203 if (ret)
2204 break;
2205
2206 nframes -= nr;
2207 lba += nr;
2208 ubuf += len;
2209 }
2210
2211 return ret;
2212}
2213
2214static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2215 int lba, int nframes)
2216{
2217 int ret;
2218
2219 if (cdi->cdda_method == CDDA_OLD)
2220 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2221
2222retry:
2223 /*
2224 * for anything else than success and io error, we need to retry
2225 */
2226 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2227 if (!ret || ret != -EIO)
2228 return ret;
2229
2230 /*
2231 * I've seen drives get sense 4/8/3 udma crc errors on multi
2232 * frame dma, so drop to single frame dma if we need to
2233 */
2234 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
e597cd09 2235 pr_info("dropping to single frame dma\n");
1da177e4
LT		 2236 cdi->cdda_method = CDDA_BPC_SINGLE;
2237 goto retry;
2238 }
2239
2240 /*
2241 * so we have an io error of some sort with multi frame dma. if the
2242 * condition wasn't a hardware error
2243 * problems, not for any error
2244 */
2245 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2246 return ret;
2247
e597cd09 2248 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
1da177e4
LT		 2249 cdi->cdda_method = CDDA_OLD;
2250 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2251}
2252
d2c5d4fc
CH		 2253static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2254 void __user *argp)
1da177e4 2255{
d2c5d4fc
CH		 2256 struct cdrom_multisession ms_info;
2257 u8 requested_format;
1da177e4
LT		 2258 int ret;
2259
d2c5d4fc
CH		 2260 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2261
2262 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2263 return -ENOSYS;
2264
2265 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2266 return -EFAULT;
2267
2268 requested_format = ms_info.addr_format;
2269 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2270 return -EINVAL;
2271 ms_info.addr_format = CDROM_LBA;
2272
2273 ret = cdi->ops->get_last_session(cdi, &ms_info);
2274 if (ret)
1da177e4
LT		 2275 return ret;
2276
d2c5d4fc
CH		 2277 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2278
2279 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2280 return -EFAULT;
2281
2282 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2283 return 0;
2284}
2285
2286static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2287{
2288 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2289
2290 if (!CDROM_CAN(CDC_OPEN_TRAY))
2291 return -ENOSYS;
2292 if (cdi->use_count != 1 || keeplocked)
2293 return -EBUSY;
2294 if (CDROM_CAN(CDC_LOCK)) {
2295 int ret = cdi->ops->lock_door(cdi, 0);
2296 if (ret)
1da177e4 2297 return ret;
d2c5d4fc 2298 }
1da177e4 2299
d2c5d4fc
CH		 2300 return cdi->ops->tray_move(cdi, 1);
2301}
1da177e4 2302
d2c5d4fc
CH		 2303static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2304{
2305 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2306
d2c5d4fc
CH		 2307 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2308 return -ENOSYS;
2309 return cdi->ops->tray_move(cdi, 0);
2310}
1da177e4 2311
d2c5d4fc
CH		 2312static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2313 unsigned long arg)
2314{
2315 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2316
d2c5d4fc
CH		 2317 if (!CDROM_CAN(CDC_OPEN_TRAY))
2318 return -ENOSYS;
2319 if (keeplocked)
2320 return -EBUSY;
1da177e4 2321
d2c5d4fc
CH		 2322 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2323 if (arg)
2324 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2325 return 0;
2326}
1da177e4 2327
d2c5d4fc
CH		 2328static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2329 unsigned long arg)
2330{
2331 struct cdrom_changer_info *info;
2332 int ret;
1da177e4 2333
d2c5d4fc 2334 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2335
d2c5d4fc
CH		 2336 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2337 return -ENOSYS;
1da177e4 2338
d2c5d4fc
CH		 2339 /* cannot select disc or select current disc */
2340 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2341 return media_changed(cdi, 1);
1da177e4 2342
d2c5d4fc
CH		 2343 if ((unsigned int)arg >= cdi->capacity)
2344 return -EINVAL;
1da177e4 2345
d2c5d4fc
CH		 2346 info = kmalloc(sizeof(*info), GFP_KERNEL);
2347 if (!info)
2348 return -ENOMEM;
1da177e4 2349
d2c5d4fc
CH		 2350 ret = cdrom_read_mech_status(cdi, info);
2351 if (!ret)
2352 ret = info->slots[arg].change;
2353 kfree(info);
2354 return ret;
2355}
1da177e4 2356
d2c5d4fc
CH		 2357static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2358 unsigned long arg)
2359{
2360 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2361
d2c5d4fc
CH		 2362 /*
2363 * Options need to be in sync with capability.
2364 * Too late for that, so we have to check each one separately.
2365 */
2366 switch (arg) {
2367 case CDO_USE_FFLAGS:
2368 case CDO_CHECK_TYPE:
2369 break;
2370 case CDO_LOCK:
2371 if (!CDROM_CAN(CDC_LOCK))
2372 return -ENOSYS;
2373 break;
2374 case 0:
2375 return cdi->options;
2376 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2377 default:
2378 if (!CDROM_CAN(arg))
1da177e4 2379 return -ENOSYS;
d2c5d4fc
CH		 2380 }
2381 cdi->options |= (int) arg;
2382 return cdi->options;
2383}
1da177e4 2384
d2c5d4fc
CH		 2385static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2386 unsigned long arg)
2387{
2388 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2389
d2c5d4fc
CH		 2390 cdi->options &= ~(int) arg;
2391 return cdi->options;
2392}
1da177e4 2393
d2c5d4fc
CH		 2394static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2395 unsigned long arg)
2396{
2397 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2398
d2c5d4fc
CH		 2399 if (!CDROM_CAN(CDC_SELECT_SPEED))
2400 return -ENOSYS;
2401 return cdi->ops->select_speed(cdi, arg);
2402}
1da177e4 2403
d2c5d4fc
CH		 2404static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2405 unsigned long arg)
2406{
2407 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2408
2409 if (!CDROM_CAN(CDC_SELECT_DISC))
2410 return -ENOSYS;
2411
2412 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2413 if ((int)arg >= cdi->capacity)
2414 return -EINVAL;
2415 }
2416
2417 /*
2418 * ->select_disc is a hook to allow a driver-specific way of
2419 * seleting disc. However, since there is no equivalent hook for
2420 * cdrom_slot_status this may not actually be useful...
2421 */
2422 if (cdi->ops->select_disc)
2423 return cdi->ops->select_disc(cdi, arg);
2424
2425 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2426 return cdrom_select_disc(cdi, arg);
2427}
2428
2429static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2430 struct block_device *bdev)
2431{
2432 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2433
2434 if (!capable(CAP_SYS_ADMIN))
2435 return -EACCES;
2436 if (!CDROM_CAN(CDC_RESET))
2437 return -ENOSYS;
f98393a6 2438 invalidate_bdev(bdev);
d2c5d4fc
CH		 2439 return cdi->ops->reset(cdi);
2440}
2441
2442static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2443 unsigned long arg)
2444{
2445 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2446
2447 if (!CDROM_CAN(CDC_LOCK))
2448 return -EDRIVE_CANT_DO_THIS;
2449
2450 keeplocked = arg ? 1 : 0;
2451
2452 /*
2453 * Don't unlock the door on multiple opens by default, but allow
2454 * root to do so.
2455 */
2456 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2457 return -EBUSY;
2458 return cdi->ops->lock_door(cdi, arg);
2459}
2460
2461static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2462 unsigned long arg)
2463{
2464 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2465
2466 if (!capable(CAP_SYS_ADMIN))
2467 return -EACCES;
2468 debug = arg ? 1 : 0;
2469 return debug;
2470}
1da177e4 2471
d2c5d4fc
CH		 2472static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2473{
2474 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2475 return (cdi->ops->capability & ~cdi->mask);
2476}
2477
2478/*
2479 * The following function is implemented, although very few audio
1da177e4
LT		 2480 * discs give Universal Product Code information, which should just be
2481 * the Medium Catalog Number on the box. Note, that the way the code
2482 * is written on the CD is /not/ uniform across all discs!
2483 */
d2c5d4fc
CH		 2484static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2485 void __user *argp)
2486{
2487 struct cdrom_mcn mcn;
2488 int ret;
1da177e4 2489
d2c5d4fc 2490 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2491
d2c5d4fc
CH		 2492 if (!(cdi->ops->capability & CDC_MCN))
2493 return -ENOSYS;
2494 ret = cdi->ops->get_mcn(cdi, &mcn);
2495 if (ret)
2496 return ret;
1da177e4 2497
d2c5d4fc
CH		 2498 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2499 return -EFAULT;
2500 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2501 return 0;
2502}
1da177e4 2503
d2c5d4fc
CH		 2504static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2505 unsigned long arg)
2506{
2507 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2508
2509 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2510 return -ENOSYS;
2511 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2512 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2513 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2514 if (((int)arg >= cdi->capacity))
2515 return -EINVAL;
2516 return cdrom_slot_status(cdi, arg);
2517}
2518
2519/*
2520 * Ok, this is where problems start. The current interface for the
2521 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2522 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2523 * is often the case, it is also very common for CDs to have some tracks
2524 * with data, and some tracks with audio. Just because I feel like it,
2525 * I declare the following to be the best way to cope. If the CD has ANY
2526 * data tracks on it, it will be returned as a data CD. If it has any XA
2527 * tracks, I will return it as that. Now I could simplify this interface
2528 * by combining these returns with the above, but this more clearly
2529 * demonstrates the problem with the current interface. Too bad this
2530 * wasn't designed to use bitmasks... -Erik
2531 *
2532 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2533 * User level programmers might feel the ioctl is not very useful.
2534 * ---david
2535 */
2536static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2537{
2538 tracktype tracks;
2539
2540 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2541
2542 cdrom_count_tracks(cdi, &tracks);
2543 if (tracks.error)
2544 return tracks.error;
2545
2546 /* Policy mode on */
2547 if (tracks.audio > 0) {
2548 if (!tracks.data && !tracks.cdi && !tracks.xa)
2549 return CDS_AUDIO;
2550 else
2551 return CDS_MIXED;
1da177e4
LT		 2552 }
2553
d2c5d4fc
CH		 2554 if (tracks.cdi > 0)
2555 return CDS_XA_2_2;
2556 if (tracks.xa > 0)
2557 return CDS_XA_2_1;
2558 if (tracks.data > 0)
2559 return CDS_DATA_1;
2560 /* Policy mode off */
2561
2562 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2563 return CDS_NO_INFO;
2564}
2565
2566static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2567{
2568 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2569 return cdi->capacity;
2570}
2571
2572static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2573 void __user *argp)
2574{
2575 struct cdrom_subchnl q;
2576 u8 requested, back;
2577 int ret;
2578
2579 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2580
d2c5d4fc
CH		 2581 if (copy_from_user(&q, argp, sizeof(q)))
2582 return -EFAULT;
2583
2584 requested = q.cdsc_format;
2585 if (requested != CDROM_MSF && requested != CDROM_LBA)
2586 return -EINVAL;
2587 q.cdsc_format = CDROM_MSF;
2588
2589 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2590 if (ret)
2591 return ret;
2592
2593 back = q.cdsc_format; /* local copy */
2594 sanitize_format(&q.cdsc_absaddr, &back, requested);
2595 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2596
2597 if (copy_to_user(argp, &q, sizeof(q)))
2598 return -EFAULT;
2599 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2600 return 0;
2601}
2602
2603static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2604 void __user *argp)
2605{
2606 struct cdrom_tochdr header;
2607 int ret;
2608
2609 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2610
d2c5d4fc
CH		 2611 if (copy_from_user(&header, argp, sizeof(header)))
2612 return -EFAULT;
2613
2614 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2615 if (ret)
2616 return ret;
2617
2618 if (copy_to_user(argp, &header, sizeof(header)))
2619 return -EFAULT;
2620 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2621 return 0;
2622}
2623
2624static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2625 void __user *argp)
2626{
2627 struct cdrom_tocentry entry;
2628 u8 requested_format;
2629 int ret;
2630
2631 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2632
d2c5d4fc
CH		 2633 if (copy_from_user(&entry, argp, sizeof(entry)))
2634 return -EFAULT;
2635
2636 requested_format = entry.cdte_format;
2637 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2638 return -EINVAL;
2639 /* make interface to low-level uniform */
2640 entry.cdte_format = CDROM_MSF;
2641 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2642 if (ret)
2643 return ret;
2644 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2645
2646 if (copy_to_user(argp, &entry, sizeof(entry)))
2647 return -EFAULT;
2648 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2649 return 0;
2650}
2651
2652static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2653 void __user *argp)
2654{
2655 struct cdrom_msf msf;
2656
2657 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2658
2659 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2660 return -ENOSYS;
2661 if (copy_from_user(&msf, argp, sizeof(msf)))
2662 return -EFAULT;
2663 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2664}
2665
2666static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2667 void __user *argp)
2668{
2669 struct cdrom_ti ti;
2670 int ret;
2671
2672 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2673
2674 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2675 return -ENOSYS;
2676 if (copy_from_user(&ti, argp, sizeof(ti)))
2677 return -EFAULT;
2678
2679 ret = check_for_audio_disc(cdi, cdi->ops);
2680 if (ret)
2681 return ret;
2682 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2683}
2684static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2685 void __user *argp)
2686{
2687 struct cdrom_volctrl volume;
2688
2689 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2690
2691 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2692 return -ENOSYS;
2693 if (copy_from_user(&volume, argp, sizeof(volume)))
2694 return -EFAULT;
2695 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2696}
2697
2698static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2699 void __user *argp)
2700{
2701 struct cdrom_volctrl volume;
2702 int ret;
2703
2704 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2705
2706 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2707 return -ENOSYS;
2708
2709 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2710 if (ret)
2711 return ret;
2712
2713 if (copy_to_user(argp, &volume, sizeof(volume)))
2714 return -EFAULT;
2715 return 0;
2716}
2717
2718static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2719 unsigned int cmd)
2720{
2721 int ret;
2722
2723 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2724
2725 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2726 return -ENOSYS;
2727 ret = check_for_audio_disc(cdi, cdi->ops);
2728 if (ret)
2729 return ret;
2730 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2731}
2732
2733/*
2734 * Just about every imaginable ioctl is supported in the Uniform layer
2735 * these days.
2736 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2737 */
bbc1cc97
AV		 2738int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2739 fmode_t mode, unsigned int cmd, unsigned long arg)
d2c5d4fc
CH		 2740{
2741 void __user *argp = (void __user *)arg;
2742 int ret;
bbc1cc97 2743 struct gendisk *disk = bdev->bd_disk;
d2c5d4fc
CH		 2744
2745 /*
2746 * Try the generic SCSI command ioctl's first.
2747 */
bbc1cc97 2748 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
d2c5d4fc
CH		 2749 if (ret != -ENOTTY)
2750 return ret;
2751
2752 switch (cmd) {
2753 case CDROMMULTISESSION:
2754 return cdrom_ioctl_multisession(cdi, argp);
2755 case CDROMEJECT:
2756 return cdrom_ioctl_eject(cdi);
2757 case CDROMCLOSETRAY:
2758 return cdrom_ioctl_closetray(cdi);
2759 case CDROMEJECT_SW:
2760 return cdrom_ioctl_eject_sw(cdi, arg);
2761 case CDROM_MEDIA_CHANGED:
2762 return cdrom_ioctl_media_changed(cdi, arg);
2763 case CDROM_SET_OPTIONS:
2764 return cdrom_ioctl_set_options(cdi, arg);
2765 case CDROM_CLEAR_OPTIONS:
2766 return cdrom_ioctl_clear_options(cdi, arg);
2767 case CDROM_SELECT_SPEED:
2768 return cdrom_ioctl_select_speed(cdi, arg);
2769 case CDROM_SELECT_DISC:
2770 return cdrom_ioctl_select_disc(cdi, arg);
2771 case CDROMRESET:
bbc1cc97 2772 return cdrom_ioctl_reset(cdi, bdev);
d2c5d4fc
CH		 2773 case CDROM_LOCKDOOR:
2774 return cdrom_ioctl_lock_door(cdi, arg);
2775 case CDROM_DEBUG:
2776 return cdrom_ioctl_debug(cdi, arg);
2777 case CDROM_GET_CAPABILITY:
2778 return cdrom_ioctl_get_capability(cdi);
2779 case CDROM_GET_MCN:
2780 return cdrom_ioctl_get_mcn(cdi, argp);
2781 case CDROM_DRIVE_STATUS:
2782 return cdrom_ioctl_drive_status(cdi, arg);
2783 case CDROM_DISC_STATUS:
2784 return cdrom_ioctl_disc_status(cdi);
2785 case CDROM_CHANGER_NSLOTS:
2786 return cdrom_ioctl_changer_nslots(cdi);
2787 }
2788
2789 /*
2790 * Use the ioctls that are implemented through the generic_packet()
2791 * interface. this may look at bit funny, but if -ENOTTY is
2792 * returned that particular ioctl is not implemented and we
2793 * let it go through the device specific ones.
2794 */
1da177e4
LT		 2795 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2796 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2797 if (ret != -ENOTTY)
1da177e4 2798 return ret;
1da177e4
LT		 2799 }
2800
d2c5d4fc
CH		 2801 /*
2802 * Note: most of the cdinfo() calls are commented out here,
2803 * because they fill up the sys log when CD players poll
2804 * the drive.
2805 */
1da177e4 2806 switch (cmd) {
d2c5d4fc
CH		 2807 case CDROMSUBCHNL:
2808 return cdrom_ioctl_get_subchnl(cdi, argp);
2809 case CDROMREADTOCHDR:
2810 return cdrom_ioctl_read_tochdr(cdi, argp);
2811 case CDROMREADTOCENTRY:
2812 return cdrom_ioctl_read_tocentry(cdi, argp);
2813 case CDROMPLAYMSF:
2814 return cdrom_ioctl_play_msf(cdi, argp);
2815 case CDROMPLAYTRKIND:
2816 return cdrom_ioctl_play_trkind(cdi, argp);
2817 case CDROMVOLCTRL:
2818 return cdrom_ioctl_volctrl(cdi, argp);
2819 case CDROMVOLREAD:
2820 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2821 case CDROMSTART:
2822 case CDROMSTOP:
2823 case CDROMPAUSE:
d2c5d4fc
CH		 2824 case CDROMRESUME:
2825 return cdrom_ioctl_audioctl(cdi, cmd);
2826 }
1da177e4 2827
1da177e4
LT		 2828 return -ENOSYS;
2829}
2830
1da177e4
LT		 2831/*
2832 * Required when we need to use READ_10 to issue other than 2048 block
2833 * reads
2834 */
2835static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2836{
2837 struct cdrom_device_ops *cdo = cdi->ops;
2838 struct packet_command cgc;
2839 struct modesel_head mh;
2840
2841 memset(&mh, 0, sizeof(mh));
2842 mh.block_desc_length = 0x08;
2843 mh.block_length_med = (size >> 8) & 0xff;
2844 mh.block_length_lo = size & 0xff;
2845
2846 memset(&cgc, 0, sizeof(cgc));
2847 cgc.cmd[0] = 0x15;
2848 cgc.cmd[1] = 1 << 4;
2849 cgc.cmd[4] = 12;
2850 cgc.buflen = sizeof(mh);
2851 cgc.buffer = (char *) &mh;
2852 cgc.data_direction = CGC_DATA_WRITE;
2853 mh.block_desc_length = 0x08;
2854 mh.block_length_med = (size >> 8) & 0xff;
2855 mh.block_length_lo = size & 0xff;
2856
2857 return cdo->generic_packet(cdi, &cgc);
2858}
2859
3147c531
MS		 2860static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2861 void __user *arg,
2862 struct packet_command *cgc,
2863 int cmd)
2864{
1da177e4 2865 struct request_sense sense;
3147c531
MS		 2866 struct cdrom_msf msf;
2867 int blocksize = 0, format = 0, lba;
2868 int ret;
1da177e4 2869
1da177e4
LT		 2870 switch (cmd) {
2871 case CDROMREADRAW:
3147c531
MS		 2872 blocksize = CD_FRAMESIZE_RAW;
2873 break;
1da177e4 2874 case CDROMREADMODE1:
3147c531
MS		 2875 blocksize = CD_FRAMESIZE;
2876 format = 2;
2877 break;
2878 case CDROMREADMODE2:
2879 blocksize = CD_FRAMESIZE_RAW0;
2880 break;
2881 }
2882 IOCTL_IN(arg, struct cdrom_msf, msf);
2883 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2884 /* FIXME: we need upper bound checking, too!! */
2885 if (lba < 0)
2886 return -EINVAL;
2887
2888 cgc->buffer = kmalloc(blocksize, GFP_KERNEL);
2889 if (cgc->buffer == NULL)
2890 return -ENOMEM;
2891
2892 memset(&sense, 0, sizeof(sense));
2893 cgc->sense = &sense;
2894 cgc->data_direction = CGC_DATA_READ;
2895 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2896 if (ret && sense.sense_key == 0x05 &&
2897 sense.asc == 0x20 &&
2898 sense.ascq == 0x00) {
2899 /*
2900 * SCSI-II devices are not required to support
2901 * READ_CD, so let's try switching block size
2902 */
2903 /* FIXME: switch back again... */
2904 ret = cdrom_switch_blocksize(cdi, blocksize);
2905 if (ret)
2906 goto out;
2907 cgc->sense = NULL;
2908 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2909 ret |= cdrom_switch_blocksize(cdi, blocksize);
2910 }
2911 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2912 ret = -EFAULT;
2913out:
2914 kfree(cgc->buffer);
2915 return ret;
2916}
2917
2918static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2919 void __user *arg)
2920{
2921 struct cdrom_read_audio ra;
2922 int lba;
2923
2924 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2925
2926 if (ra.addr_format == CDROM_MSF)
2927 lba = msf_to_lba(ra.addr.msf.minute,
2928 ra.addr.msf.second,
2929 ra.addr.msf.frame);
2930 else if (ra.addr_format == CDROM_LBA)
2931 lba = ra.addr.lba;
2932 else
2933 return -EINVAL;
2934
2935 /* FIXME: we need upper bound checking, too!! */
2936 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2937 return -EINVAL;
2938
2939 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2940}
2941
2942static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2943 void __user *arg)
2944{
2945 int ret;
2946 struct cdrom_subchnl q;
2947 u_char requested, back;
2948 IOCTL_IN(arg, struct cdrom_subchnl, q);
2949 requested = q.cdsc_format;
2950 if (!((requested == CDROM_MSF) ||
2951 (requested == CDROM_LBA)))
2952 return -EINVAL;
2953 q.cdsc_format = CDROM_MSF;
2954 ret = cdrom_read_subchannel(cdi, &q, 0);
2955 if (ret)
1da177e4 2956 return ret;
3147c531
MS		 2957 back = q.cdsc_format; /* local copy */
2958 sanitize_format(&q.cdsc_absaddr, &back, requested);
2959 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2960 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2961 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2962 return 0;
2963}
1da177e4 2964
3147c531
MS		 2965static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2966 void __user *arg,
2967 struct packet_command *cgc)
2968{
2969 struct cdrom_device_ops *cdo = cdi->ops;
2970 struct cdrom_msf msf;
2971 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2972 IOCTL_IN(arg, struct cdrom_msf, msf);
2973 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2974 cgc->cmd[3] = msf.cdmsf_min0;
2975 cgc->cmd[4] = msf.cdmsf_sec0;
2976 cgc->cmd[5] = msf.cdmsf_frame0;
2977 cgc->cmd[6] = msf.cdmsf_min1;
2978 cgc->cmd[7] = msf.cdmsf_sec1;
2979 cgc->cmd[8] = msf.cdmsf_frame1;
2980 cgc->data_direction = CGC_DATA_NONE;
2981 return cdo->generic_packet(cdi, cgc);
2982}
1da177e4 2983
3147c531
MS		 2984static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2985 void __user *arg,
2986 struct packet_command *cgc)
2987{
2988 struct cdrom_device_ops *cdo = cdi->ops;
2989 struct cdrom_blk blk;
2990 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2991 IOCTL_IN(arg, struct cdrom_blk, blk);
2992 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
2993 cgc->cmd[2] = (blk.from >> 24) & 0xff;
2994 cgc->cmd[3] = (blk.from >> 16) & 0xff;
2995 cgc->cmd[4] = (blk.from >> 8) & 0xff;
2996 cgc->cmd[5] = blk.from & 0xff;
2997 cgc->cmd[7] = (blk.len >> 8) & 0xff;
2998 cgc->cmd[8] = blk.len & 0xff;
2999 cgc->data_direction = CGC_DATA_NONE;
3000 return cdo->generic_packet(cdi, cgc);
3001}
1da177e4 3002
3147c531
MS		 3003static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3004 void __user *arg,
3005 struct packet_command *cgc,
3006 unsigned int cmd)
3007{
3008 struct cdrom_volctrl volctrl;
3009 unsigned char buffer[32];
3010 char mask[sizeof(buffer)];
3011 unsigned short offset;
3012 int ret;
3013
3014 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
1da177e4 3015
3147c531 3016 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
1da177e4 3017
3147c531
MS		 3018 cgc->buffer = buffer;
3019 cgc->buflen = 24;
3020 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3021 if (ret)
3022 return ret;
1da177e4 3023
3147c531
MS		 3024 /* originally the code depended on buffer[1] to determine
3025 how much data is available for transfer. buffer[1] is
3026 unfortunately ambigious and the only reliable way seem
3027 to be to simply skip over the block descriptor... */
3028 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3029
3030 if (offset + 16 > sizeof(buffer))
3031 return -E2BIG;
3032
3033 if (offset + 16 > cgc->buflen) {
3034 cgc->buflen = offset + 16;
3035 ret = cdrom_mode_sense(cdi, cgc,
3036 GPMODE_AUDIO_CTL_PAGE, 0);
3037 if (ret)
3038 return ret;
3039 }
1da177e4 3040
3147c531
MS		 3041 /* sanity check */
3042 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3043 buffer[offset + 1] < 14)
3044 return -EINVAL;
1da177e4 3045
3147c531
MS		 3046 /* now we have the current volume settings. if it was only
3047 a CDROMVOLREAD, return these values */
3048 if (cmd == CDROMVOLREAD) {
3049 volctrl.channel0 = buffer[offset+9];
3050 volctrl.channel1 = buffer[offset+11];
3051 volctrl.channel2 = buffer[offset+13];
3052 volctrl.channel3 = buffer[offset+15];
3053 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
3054 return 0;
3055 }
1da177e4 3056
3147c531
MS		 3057 /* get the volume mask */
3058 cgc->buffer = mask;
3059 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3060 if (ret)
3061 return ret;
1da177e4 3062
3147c531
MS		 3063 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3064 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3065 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3066 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
1da177e4 3067
3147c531
MS		 3068 /* set volume */
3069 cgc->buffer = buffer + offset - 8;
3070 memset(cgc->buffer, 0, 8);
3071 return cdrom_mode_select(cdi, cgc);
3072}
1da177e4 3073
3147c531
MS		 3074static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3075 struct packet_command *cgc,
3076 int cmd)
3077{
3078 struct cdrom_device_ops *cdo = cdi->ops;
3079 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3080 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3081 cgc->cmd[1] = 1;
3082 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3083 cgc->data_direction = CGC_DATA_NONE;
3084 return cdo->generic_packet(cdi, cgc);
3085}
1da177e4 3086
3147c531
MS		 3087static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3088 struct packet_command *cgc,
3089 int cmd)
3090{
3091 struct cdrom_device_ops *cdo = cdi->ops;
3092 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3093 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3094 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3095 cgc->data_direction = CGC_DATA_NONE;
3096 return cdo->generic_packet(cdi, cgc);
3097}
1da177e4 3098
3147c531 3099static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
d194139c
MS		 3100 void __user *arg,
3101 struct packet_command *cgc)
3147c531
MS		 3102{
3103 int ret;
3104 dvd_struct *s;
3105 int size = sizeof(dvd_struct);
3106
3107 if (!CDROM_CAN(CDC_DVD))
3108 return -ENOSYS;
3109
3110 s = kmalloc(size, GFP_KERNEL);
3111 if (!s)
3112 return -ENOMEM;
3113
3114 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3115 if (copy_from_user(s, arg, size)) {
1da177e4 3116 kfree(s);
3147c531
MS		 3117 return -EFAULT;
3118 }
3119
d194139c 3120 ret = dvd_read_struct(cdi, s, cgc);
3147c531
MS		 3121 if (ret)
3122 goto out;
3123
3124 if (copy_to_user(arg, s, size))
3125 ret = -EFAULT;
3126out:
3127 kfree(s);
3128 return ret;
3129}
3130
3131static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3132 void __user *arg)
3133{
3134 int ret;
3135 dvd_authinfo ai;
3136 if (!CDROM_CAN(CDC_DVD))
3137 return -ENOSYS;
3138 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3139 IOCTL_IN(arg, dvd_authinfo, ai);
3140 ret = dvd_do_auth(cdi, &ai);
3141 if (ret)
1da177e4 3142 return ret;
3147c531
MS		 3143 IOCTL_OUT(arg, dvd_authinfo, ai);
3144 return 0;
3145}
1da177e4 3146
3147c531
MS		 3147static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3148 void __user *arg)
3149{
3150 int ret;
3151 long next = 0;
3152 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3153 ret = cdrom_get_next_writable(cdi, &next);
3154 if (ret)
3155 return ret;
3156 IOCTL_OUT(arg, long, next);
3157 return 0;
3158}
1da177e4 3159
3147c531
MS		 3160static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3161 void __user *arg)
3162{
3163 int ret;
3164 long last = 0;
3165 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3166 ret = cdrom_get_last_written(cdi, &last);
3167 if (ret)
3168 return ret;
3169 IOCTL_OUT(arg, long, last);
3170 return 0;
3171}
3172
3173static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3174 unsigned long arg)
3175{
3176 struct packet_command cgc;
3177 void __user *userptr = (void __user *)arg;
3178
3179 memset(&cgc, 0, sizeof(cgc));
3180
3181 /* build a unified command and queue it through
3182 cdo->generic_packet() */
3183 switch (cmd) {
3184 case CDROMREADRAW:
3185 case CDROMREADMODE1:
3186 case CDROMREADMODE2:
3187 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3188 case CDROMREADAUDIO:
3189 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3190 case CDROMSUBCHNL:
3191 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3192 case CDROMPLAYMSF:
3193 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3194 case CDROMPLAYBLK:
3195 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3196 case CDROMVOLCTRL:
3197 case CDROMVOLREAD:
3198 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3199 case CDROMSTART:
3200 case CDROMSTOP:
3201 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3202 case CDROMPAUSE:
3203 case CDROMRESUME:
3204 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3205 case DVD_READ_STRUCT:
d194139c 3206 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3147c531
MS		 3207 case DVD_AUTH:
3208 return mmc_ioctl_dvd_auth(cdi, userptr);
3209 case CDROM_NEXT_WRITABLE:
3210 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3211 case CDROM_LAST_WRITTEN:
3212 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3213 }
1da177e4
LT		 3214
3215 return -ENOTTY;
3216}
3217
3218static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3219 track_information *ti)
3220{
3221 struct cdrom_device_ops *cdo = cdi->ops;
3222 struct packet_command cgc;
3223 int ret, buflen;
3224
3225 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3226 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3227 cgc.cmd[1] = type & 3;
3228 cgc.cmd[4] = (track & 0xff00) >> 8;
3229 cgc.cmd[5] = track & 0xff;
3230 cgc.cmd[8] = 8;
3231 cgc.quiet = 1;
3232
3233 if ((ret = cdo->generic_packet(cdi, &cgc)))
3234 return ret;
3235
3236 buflen = be16_to_cpu(ti->track_information_length) +
3237 sizeof(ti->track_information_length);
3238
3239 if (buflen > sizeof(track_information))
3240 buflen = sizeof(track_information);
3241
3242 cgc.cmd[8] = cgc.buflen = buflen;
3243 if ((ret = cdo->generic_packet(cdi, &cgc)))
3244 return ret;
3245
3246 /* return actual fill size */
3247 return buflen;
3248}
3249
3250/* requires CD R/RW */
3251static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3252{
3253 struct cdrom_device_ops *cdo = cdi->ops;
3254 struct packet_command cgc;
3255 int ret, buflen;
3256
3257 /* set up command and get the disc info */
3258 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3259 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3260 cgc.cmd[8] = cgc.buflen = 2;
3261 cgc.quiet = 1;
3262
3263 if ((ret = cdo->generic_packet(cdi, &cgc)))
3264 return ret;
3265
3266 /* not all drives have the same disc_info length, so requeue
3267 * packet with the length the drive tells us it can supply
3268 */
3269 buflen = be16_to_cpu(di->disc_information_length) +
3270 sizeof(di->disc_information_length);
3271
3272 if (buflen > sizeof(disc_information))
3273 buflen = sizeof(disc_information);
3274
3275 cgc.cmd[8] = cgc.buflen = buflen;
3276 if ((ret = cdo->generic_packet(cdi, &cgc)))
3277 return ret;
3278
3279 /* return actual fill size */
3280 return buflen;
3281}
3282
3283/* return the last written block on the CD-R media. this is for the udf
3284 file system. */
3285int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3286{
3287 struct cdrom_tocentry toc;
3288 disc_information di;
3289 track_information ti;
3290 __u32 last_track;
3291 int ret = -1, ti_size;
3292
3293 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3294 goto use_toc;
3295
3296 ret = cdrom_get_disc_info(cdi, &di);
3297 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3298 + sizeof(di.last_track_lsb)))
3299 goto use_toc;
3300
3301 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3302 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3303 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3304 if (ti_size < (int)offsetof(typeof(ti), track_start))
3305 goto use_toc;
3306
3307 /* if this track is blank, try the previous. */
3308 if (ti.blank) {
3309 if (last_track==1)
3310 goto use_toc;
3311 last_track--;
3312 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3313 }
3314
3315 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3316 + sizeof(ti.track_size)))
3317 goto use_toc;
3318
3319 /* if last recorded field is valid, return it. */
3320 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3321 + sizeof(ti.last_rec_address))) {
3322 *last_written = be32_to_cpu(ti.last_rec_address);
3323 } else {
3324 /* make it up instead */
3325 *last_written = be32_to_cpu(ti.track_start) +
3326 be32_to_cpu(ti.track_size);
3327 if (ti.free_blocks)
3328 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3329 }
3330 return 0;
3331
3332 /* this is where we end up if the drive either can't do a
3333 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3334 it doesn't give enough information or fails. then we return
3335 the toc contents. */
3336use_toc:
3337 toc.cdte_format = CDROM_MSF;
3338 toc.cdte_track = CDROM_LEADOUT;
3339 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3340 return ret;
3341 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3342 *last_written = toc.cdte_addr.lba;
3343 return 0;
3344}
3345
3346/* return the next writable block. also for udf file system. */
3347static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3348{
3349 disc_information di;
3350 track_information ti;
3351 __u16 last_track;
3352 int ret, ti_size;
3353
3354 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3355 goto use_last_written;
3356
3357 ret = cdrom_get_disc_info(cdi, &di);
3358 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3359 + sizeof(di.last_track_lsb))
3360 goto use_last_written;
3361
3362 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3363 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3364 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3365 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3366 goto use_last_written;
3367
3368 /* if this track is blank, try the previous. */
3369 if (ti.blank) {
3370 if (last_track == 1)
3371 goto use_last_written;
3372 last_track--;
3373 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3374 if (ti_size < 0)
3375 goto use_last_written;
3376 }
3377
3378 /* if next recordable address field is valid, use it. */
3379 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3380 + sizeof(ti.next_writable)) {
3381 *next_writable = be32_to_cpu(ti.next_writable);
3382 return 0;
3383 }
3384
3385use_last_written:
3386 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3387 *next_writable = 0;
3388 return ret;
3389 } else {
3390 *next_writable += 7;
3391 return 0;
3392 }
3393}
3394
3395EXPORT_SYMBOL(cdrom_get_last_written);
3396EXPORT_SYMBOL(register_cdrom);
3397EXPORT_SYMBOL(unregister_cdrom);
3398EXPORT_SYMBOL(cdrom_open);
3399EXPORT_SYMBOL(cdrom_release);
3400EXPORT_SYMBOL(cdrom_ioctl);
3401EXPORT_SYMBOL(cdrom_media_changed);
3402EXPORT_SYMBOL(cdrom_number_of_slots);
3403EXPORT_SYMBOL(cdrom_mode_select);
3404EXPORT_SYMBOL(cdrom_mode_sense);
3405EXPORT_SYMBOL(init_cdrom_command);
3406EXPORT_SYMBOL(cdrom_get_media_event);
3407
3408#ifdef CONFIG_SYSCTL
3409
3410#define CDROM_STR_SIZE 1000
3411
3412static struct cdrom_sysctl_settings {
3413 char info[CDROM_STR_SIZE]; /* general info */
3414 int autoclose; /* close tray upon mount, etc */
3415 int autoeject; /* eject on umount */
3416 int debug; /* turn on debugging messages */
3417 int lock; /* lock the door on device open */
3418 int check; /* check media type */
3419} cdrom_sysctl_settings;
3420
554988d6
DY		 3421enum cdrom_print_option {
3422 CTL_NAME,
3423 CTL_SPEED,
3424 CTL_SLOTS,
3425 CTL_CAPABILITY
3426};
3427
3428static int cdrom_print_info(const char *header, int val, char *info,
3429 int *pos, enum cdrom_print_option option)
3430{
3431 const int max_size = sizeof(cdrom_sysctl_settings.info);
3432 struct cdrom_device_info *cdi;
3433 int ret;
3434
3435 ret = scnprintf(info + *pos, max_size - *pos, header);
3436 if (!ret)
3437 return 1;
3438
3439 *pos += ret;
3440
7fd097d4 3441 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3442 switch (option) {
3443 case CTL_NAME:
3444 ret = scnprintf(info + *pos, max_size - *pos,
3445 "\t%s", cdi->name);
3446 break;
3447 case CTL_SPEED:
3448 ret = scnprintf(info + *pos, max_size - *pos,
3449 "\t%d", cdi->speed);
3450 break;
3451 case CTL_SLOTS:
3452 ret = scnprintf(info + *pos, max_size - *pos,
3453 "\t%d", cdi->capacity);
3454 break;
3455 case CTL_CAPABILITY:
3456 ret = scnprintf(info + *pos, max_size - *pos,
3457 "\t%d", CDROM_CAN(val) != 0);
3458 break;
3459 default:
e597cd09 3460 pr_info("invalid option%d\n", option);
554988d6
DY		 3461 return 1;
3462 }
3463 if (!ret)
3464 return 1;
3465 *pos += ret;
3466 }
3467
3468 return 0;
3469}
3470
8d65af78 3471static int cdrom_sysctl_info(ctl_table *ctl, int write,
1da177e4
LT		 3472 void __user *buffer, size_t *lenp, loff_t *ppos)
3473{
554988d6 3474 int pos;
1da177e4 3475 char *info = cdrom_sysctl_settings.info;
554988d6 3476 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3477
3478 if (!*lenp || (*ppos && !write)) {
3479 *lenp = 0;
3480 return 0;
3481 }
3482
554988d6
DY		 3483 mutex_lock(&cdrom_mutex);
3484
1da177e4
LT		 3485 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3486
554988d6
DY		 3487 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3488 goto done;
3489 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3490 goto done;
3491 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3492 goto done;
3493 if (cdrom_print_info("\nCan close tray:\t",
3494 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3495 goto done;
3496 if (cdrom_print_info("\nCan open tray:\t",
3497 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3498 goto done;
3499 if (cdrom_print_info("\nCan lock tray:\t",
3500 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3501 goto done;
3502 if (cdrom_print_info("\nCan change speed:",
3503 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3504 goto done;
3505 if (cdrom_print_info("\nCan select disk:",
3506 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3507 goto done;
3508 if (cdrom_print_info("\nCan read multisession:",
3509 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3510 goto done;
3511 if (cdrom_print_info("\nCan read MCN:\t",
3512 CDC_MCN, info, &pos, CTL_CAPABILITY))
3513 goto done;
3514 if (cdrom_print_info("\nReports media changed:",
3515 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3516 goto done;
3517 if (cdrom_print_info("\nCan play audio:\t",
3518 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3519 goto done;
3520 if (cdrom_print_info("\nCan write CD-R:\t",
3521 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3522 goto done;
3523 if (cdrom_print_info("\nCan write CD-RW:",
3524 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3525 goto done;
3526 if (cdrom_print_info("\nCan read DVD:\t",
3527 CDC_DVD, info, &pos, CTL_CAPABILITY))
3528 goto done;
3529 if (cdrom_print_info("\nCan write DVD-R:",
3530 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3531 goto done;
3532 if (cdrom_print_info("\nCan write DVD-RAM:",
3533 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3534 goto done;
3535 if (cdrom_print_info("\nCan read MRW:\t",
3536 CDC_MRW, info, &pos, CTL_CAPABILITY))
3537 goto done;
3538 if (cdrom_print_info("\nCan write MRW:\t",
3539 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3540 goto done;
3541 if (cdrom_print_info("\nCan write RAM:\t",
3542 CDC_RAM, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3545 goto done;
3546doit:
3547 mutex_unlock(&cdrom_mutex);
8d65af78 3548 return proc_dostring(ctl, write, buffer, lenp, ppos);
554988d6 3549done:
e597cd09 3550 pr_info("info buffer too small\n");
554988d6 3551 goto doit;
1da177e4
LT		 3552}
3553
3554/* Unfortunately, per device settings are not implemented through
3555 procfs/sysctl yet. When they are, this will naturally disappear. For now
3556 just update all drives. Later this will become the template on which
3557 new registered drives will be based. */
3558static void cdrom_update_settings(void)
3559{
3560 struct cdrom_device_info *cdi;
3561
032d8d90 3562 mutex_lock(&cdrom_mutex);
7fd097d4 3563 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3564 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3565 cdi->options |= CDO_AUTO_CLOSE;
3566 else if (!autoclose)
3567 cdi->options &= ~CDO_AUTO_CLOSE;
3568 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3569 cdi->options |= CDO_AUTO_EJECT;
3570 else if (!autoeject)
3571 cdi->options &= ~CDO_AUTO_EJECT;
3572 if (lockdoor && CDROM_CAN(CDC_LOCK))
3573 cdi->options |= CDO_LOCK;
3574 else if (!lockdoor)
3575 cdi->options &= ~CDO_LOCK;
3576 if (check_media_type)
3577 cdi->options |= CDO_CHECK_TYPE;
3578 else
3579 cdi->options &= ~CDO_CHECK_TYPE;
3580 }
032d8d90 3581 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3582}
3583
8d65af78 3584static int cdrom_sysctl_handler(ctl_table *ctl, int write,
1da177e4
LT		 3585 void __user *buffer, size_t *lenp, loff_t *ppos)
3586{
1da177e4
LT		 3587 int ret;
3588
8d65af78 3589 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 3590
06489b4e 3591 if (write) {
1da177e4
LT		 3592
3593 /* we only care for 1 or 0. */
06489b4e
EB		 3594 autoclose = !!cdrom_sysctl_settings.autoclose;
3595 autoeject = !!cdrom_sysctl_settings.autoeject;
3596 debug = !!cdrom_sysctl_settings.debug;
3597 lockdoor = !!cdrom_sysctl_settings.lock;
3598 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3599
1da177e4
LT		 3600 /* update the option flags according to the changes. we
3601 don't have per device options through sysctl yet,
3602 but we will have and then this will disappear. */
3603 cdrom_update_settings();
3604 }
3605
3606 return ret;
3607}
3608
3609/* Place files in /proc/sys/dev/cdrom */
3610static ctl_table cdrom_table[] = {
3611 {
1da177e4
LT		 3612 .procname = "info",
3613 .data = &cdrom_sysctl_settings.info,
3614 .maxlen = CDROM_STR_SIZE,
3615 .mode = 0444,
6d456111 3616 .proc_handler = cdrom_sysctl_info,
1da177e4
LT		 3617 },
3618 {
1da177e4
LT		 3619 .procname = "autoclose",
3620 .data = &cdrom_sysctl_settings.autoclose,
3621 .maxlen = sizeof(int),
3622 .mode = 0644,
6d456111 3623 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3624 },
3625 {
1da177e4
LT		 3626 .procname = "autoeject",
3627 .data = &cdrom_sysctl_settings.autoeject,
3628 .maxlen = sizeof(int),
3629 .mode = 0644,
6d456111 3630 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3631 },
3632 {
1da177e4
LT		 3633 .procname = "debug",
3634 .data = &cdrom_sysctl_settings.debug,
3635 .maxlen = sizeof(int),
3636 .mode = 0644,
6d456111 3637 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3638 },
3639 {
1da177e4
LT		 3640 .procname = "lock",
3641 .data = &cdrom_sysctl_settings.lock,
3642 .maxlen = sizeof(int),
3643 .mode = 0644,
6d456111 3644 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3645 },
3646 {
1da177e4
LT		 3647 .procname = "check_media",
3648 .data = &cdrom_sysctl_settings.check,
3649 .maxlen = sizeof(int),
3650 .mode = 0644,
6d456111 3651 .proc_handler = cdrom_sysctl_handler
1da177e4 3652 },
894d2491 3653 { }
1da177e4
LT		 3654};
3655
3656static ctl_table cdrom_cdrom_table[] = {
3657 {
1da177e4
LT		 3658 .procname = "cdrom",
3659 .maxlen = 0,
3660 .mode = 0555,
3661 .child = cdrom_table,
3662 },
894d2491 3663 { }
1da177e4
LT		 3664};
3665
3666/* Make sure that /proc/sys/dev is there */
3667static ctl_table cdrom_root_table[] = {
3668 {
1da177e4
LT		 3669 .procname = "dev",
3670 .maxlen = 0,
3671 .mode = 0555,
3672 .child = cdrom_cdrom_table,
3673 },
894d2491 3674 { }
1da177e4
LT		 3675};
3676static struct ctl_table_header *cdrom_sysctl_header;
3677
3678static void cdrom_sysctl_register(void)
3679{
3680 static int initialized;
3681
3682 if (initialized == 1)
3683 return;
3684
0b4d4147 3685 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3686
3687 /* set the defaults */
3688 cdrom_sysctl_settings.autoclose = autoclose;
3689 cdrom_sysctl_settings.autoeject = autoeject;
3690 cdrom_sysctl_settings.debug = debug;
3691 cdrom_sysctl_settings.lock = lockdoor;
3692 cdrom_sysctl_settings.check = check_media_type;
3693
3694 initialized = 1;
3695}
3696
3697static void cdrom_sysctl_unregister(void)
3698{
3699 if (cdrom_sysctl_header)
3700 unregister_sysctl_table(cdrom_sysctl_header);
3701}
3702
17672cf0
AM		 3703#else /* CONFIG_SYSCTL */
3704
3705static void cdrom_sysctl_register(void)
3706{
3707}
3708
3709static void cdrom_sysctl_unregister(void)
3710{
3711}
3712
1da177e4
LT		 3713#endif /* CONFIG_SYSCTL */
3714
3715static int __init cdrom_init(void)
3716{
1da177e4 3717 cdrom_sysctl_register();
17672cf0 3718
1da177e4
LT		 3719 return 0;
3720}
3721
3722static void __exit cdrom_exit(void)
3723{
e597cd09 3724 pr_info("Uniform CD-ROM driver unloaded\n");
1da177e4 3725 cdrom_sysctl_unregister();
1da177e4
LT		 3726}
3727
3728module_init(cdrom_init);
3729module_exit(cdrom_exit);
3730MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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