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sd: implement sd_check_events()
[deliverable/linux.git] / drivers / cdrom / cdrom.c
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f30c2269 1/* linux/drivers/cdrom/cdrom.c
1da177e4
LT		 2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
5
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
8
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
11
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
16
17 To Do List:
18 ----------------------------------
19
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
24
25
26 Revision History
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
31
322.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to activly
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
36
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
39
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
45
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
49
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
52 problem).
53
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
56
57 -- Simplified some complex logic so that the source code is easier to read.
58
59 -- Other stuff I probably forgot to mention (lots of changes).
60
612.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
63
642.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
69
702.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
78
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
84
852.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
89
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
94
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
102 that bug.
103
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
107 should be...
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
113
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
117
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
120 CDC_CLOSE_TRAY.
121 -- proc info didn't mask against capabilities mask.
122
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
134 and lock.
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
140
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
143 correctly.
144 -- Fix up ioctl handling so the device specific ones actually get
145 called :).
146
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
149 page).
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
155
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
166
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
180
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
185 dvd_read_manufact.
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
189
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
193
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
199 home now.
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
202
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
213
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
217 back.
218
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
223
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
227
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
230
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
233 -- Locking fixes
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
236
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
239
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
242
243-------------------------------------------------------------------------*/
244
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}
1432
1da177e4
LT		 1433/* We want to make media_changed accessible to the user through an
1434 * ioctl. The main problem now is that we must double-buffer the
1435 * low-level implementation, to assure that the VFS and the user both
1436 * see a medium change once.
1437 */
1438
1439static
1440int media_changed(struct cdrom_device_info *cdi, int queue)
1441{
1442 unsigned int mask = (1 << (queue & 1));
1443 int ret = !!(cdi->mc_flags & mask);
2d921729 1444 bool changed;
1da177e4
LT		 1445
1446 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2d921729
TH		 1447 return ret;
1448
1da177e4 1449 /* changed since last call? */
2d921729
TH		 1450 if (cdi->ops->check_events) {
1451 BUG_ON(!queue); /* shouldn't be called from VFS path */
1452 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1453 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1454 cdi->ioctl_events = 0;
1455 } else
1456 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1457
1458 if (changed) {
1da177e4
LT		 1459 cdi->mc_flags = 0x3; /* set bit on both queues */
1460 ret |= 1;
1461 cdi->media_written = 0;
1462 }
2d921729 1463
1da177e4
LT		 1464 cdi->mc_flags &= ~mask; /* clear bit */
1465 return ret;
1466}
1467
1468int cdrom_media_changed(struct cdrom_device_info *cdi)
1469{
1470 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1471 * Returning "0" is always safe (media hasn't been changed). Do that
1472 * if the low-level cdrom driver dosn't support media changed. */
1473 if (cdi == NULL || cdi->ops->media_changed == NULL)
1474 return 0;
1475 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1476 return 0;
1477 return media_changed(cdi, 0);
1478}
1479
1480/* badly broken, I know. Is due for a fixup anytime. */
1481static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks)
1482{
1483 struct cdrom_tochdr header;
1484 struct cdrom_tocentry entry;
1485 int ret, i;
1486 tracks->data=0;
1487 tracks->audio=0;
1488 tracks->cdi=0;
1489 tracks->xa=0;
1490 tracks->error=0;
1491 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1da177e4
LT		 1492 /* Grab the TOC header so we can see how many tracks there are */
1493 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) {
1494 if (ret == -ENOMEDIUM)
1495 tracks->error = CDS_NO_DISC;
1496 else
1497 tracks->error = CDS_NO_INFO;
1498 return;
1499 }
1500 /* check what type of tracks are on this disc */
1501 entry.cdte_format = CDROM_MSF;
1502 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1503 entry.cdte_track = i;
1504 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1505 tracks->error=CDS_NO_INFO;
1506 return;
1507 }
1508 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1509 if (entry.cdte_format == 0x10)
1510 tracks->cdi++;
1511 else if (entry.cdte_format == 0x20)
1512 tracks->xa++;
1513 else
1514 tracks->data++;
1515 } else
1516 tracks->audio++;
1517 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1518 i, entry.cdte_format, entry.cdte_ctrl);
1519 }
1520 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1521 header.cdth_trk1, tracks->audio, tracks->data,
1522 tracks->cdi, tracks->xa);
1523}
1524
1525/* Requests to the low-level drivers will /always/ be done in the
1526 following format convention:
1527
1528 CDROM_LBA: all data-related requests.
1529 CDROM_MSF: all audio-related requests.
1530
1531 However, a low-level implementation is allowed to refuse this
1532 request, and return information in its own favorite format.
1533
1534 It doesn't make sense /at all/ to ask for a play_audio in LBA
1535 format, or ask for multi-session info in MSF format. However, for
1536 backward compatibility these format requests will be satisfied, but
1537 the requests to the low-level drivers will be sanitized in the more
1538 meaningful format indicated above.
1539 */
1540
1541static
1542void sanitize_format(union cdrom_addr *addr,
1543 u_char * curr, u_char requested)
1544{
1545 if (*curr == requested)
1546 return; /* nothing to be done! */
1547 if (requested == CDROM_LBA) {
1548 addr->lba = (int) addr->msf.frame +
1549 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1550 } else { /* CDROM_MSF */
1551 int lba = addr->lba;
1552 addr->msf.frame = lba % 75;
1553 lba /= 75;
1554 lba += 2;
1555 addr->msf.second = lba % 60;
1556 addr->msf.minute = lba / 60;
1557 }
1558 *curr = requested;
1559}
1560
1561void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1562 int type)
1563{
1564 memset(cgc, 0, sizeof(struct packet_command));
1565 if (buf)
1566 memset(buf, 0, len);
1567 cgc->buffer = (char *) buf;
1568 cgc->buflen = len;
1569 cgc->data_direction = type;
2e11c207 1570 cgc->timeout = CDROM_DEF_TIMEOUT;
1da177e4
LT		 1571}
1572
1573/* DVD handling */
1574
1575#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1576#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1577
1578static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1579{
1580 cgc->cmd[0] = GPCMD_REPORT_KEY;
1581 cgc->cmd[10] = type | (agid << 6);
1582 switch (type) {
1583 case 0: case 8: case 5: {
1584 cgc->buflen = 8;
1585 break;
1586 }
1587 case 1: {
1588 cgc->buflen = 16;
1589 break;
1590 }
1591 case 2: case 4: {
1592 cgc->buflen = 12;
1593 break;
1594 }
1595 }
1596 cgc->cmd[9] = cgc->buflen;
1597 cgc->data_direction = CGC_DATA_READ;
1598}
1599
1600static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1601{
1602 cgc->cmd[0] = GPCMD_SEND_KEY;
1603 cgc->cmd[10] = type | (agid << 6);
1604 switch (type) {
1605 case 1: {
1606 cgc->buflen = 16;
1607 break;
1608 }
1609 case 3: {
1610 cgc->buflen = 12;
1611 break;
1612 }
1613 case 6: {
1614 cgc->buflen = 8;
1615 break;
1616 }
1617 }
1618 cgc->cmd[9] = cgc->buflen;
1619 cgc->data_direction = CGC_DATA_WRITE;
1620}
1621
1622static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1623{
1624 int ret;
fce53847 1625 u_char buf[20];
1da177e4
LT		 1626 struct packet_command cgc;
1627 struct cdrom_device_ops *cdo = cdi->ops;
fce53847 1628 rpc_state_t rpc_state;
1da177e4 1629
fce53847 1630 memset(buf, 0, sizeof(buf));
1da177e4
LT		 1631 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1632
1633 switch (ai->type) {
1634 /* LU data send */
1635 case DVD_LU_SEND_AGID:
1636 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1637 cgc.quiet = 1;
1638 setup_report_key(&cgc, ai->lsa.agid, 0);
1639
1640 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1641 return ret;
1da177e4
LT		 1642
1643 ai->lsa.agid = buf[7] >> 6;
1644 /* Returning data, let host change state */
1645 break;
1646
1647 case DVD_LU_SEND_KEY1:
1648 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1649 setup_report_key(&cgc, ai->lsk.agid, 2);
1650
1651 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1652 return ret;
1da177e4
LT		 1653
1654 copy_key(ai->lsk.key, &buf[4]);
1655 /* Returning data, let host change state */
1656 break;
1657
1658 case DVD_LU_SEND_CHALLENGE:
1659 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1660 setup_report_key(&cgc, ai->lsc.agid, 1);
1661
1662 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1663 return ret;
1da177e4
LT		 1664
1665 copy_chal(ai->lsc.chal, &buf[4]);
1666 /* Returning data, let host change state */
1667 break;
1668
1669 /* Post-auth key */
1670 case DVD_LU_SEND_TITLE_KEY:
1671 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1672 cgc.quiet = 1;
1673 setup_report_key(&cgc, ai->lstk.agid, 4);
1674 cgc.cmd[5] = ai->lstk.lba;
1675 cgc.cmd[4] = ai->lstk.lba >> 8;
1676 cgc.cmd[3] = ai->lstk.lba >> 16;
1677 cgc.cmd[2] = ai->lstk.lba >> 24;
1678
1679 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1680 return ret;
1da177e4
LT		 1681
1682 ai->lstk.cpm = (buf[4] >> 7) & 1;
1683 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1684 ai->lstk.cgms = (buf[4] >> 4) & 3;
1685 copy_key(ai->lstk.title_key, &buf[5]);
1686 /* Returning data, let host change state */
1687 break;
1688
1689 case DVD_LU_SEND_ASF:
1690 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1691 setup_report_key(&cgc, ai->lsasf.agid, 5);
1692
1693 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1694 return ret;
1da177e4
LT		 1695
1696 ai->lsasf.asf = buf[7] & 1;
1697 break;
1698
1699 /* LU data receive (LU changes state) */
1700 case DVD_HOST_SEND_CHALLENGE:
1701 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1702 setup_send_key(&cgc, ai->hsc.agid, 1);
1703 buf[1] = 0xe;
1704 copy_chal(&buf[4], ai->hsc.chal);
1705
1706 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1707 return ret;
1da177e4
LT		 1708
1709 ai->type = DVD_LU_SEND_KEY1;
1710 break;
1711
1712 case DVD_HOST_SEND_KEY2:
1713 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1714 setup_send_key(&cgc, ai->hsk.agid, 3);
1715 buf[1] = 0xa;
1716 copy_key(&buf[4], ai->hsk.key);
1717
1718 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1719 ai->type = DVD_AUTH_FAILURE;
fce53847 1720 return ret;
1da177e4
LT		 1721 }
1722 ai->type = DVD_AUTH_ESTABLISHED;
1723 break;
1724
1725 /* Misc */
1726 case DVD_INVALIDATE_AGID:
1727 cgc.quiet = 1;
1728 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1729 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1730 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1731 return ret;
1da177e4
LT		 1732 break;
1733
1734 /* Get region settings */
1735 case DVD_LU_SEND_RPC_STATE:
1736 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1737 setup_report_key(&cgc, 0, 8);
fce53847
FT		 1738 memset(&rpc_state, 0, sizeof(rpc_state_t));
1739 cgc.buffer = (char *) &rpc_state;
1da177e4
LT		 1740
1741 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1742 return ret;
1da177e4 1743
fce53847
FT		 1744 ai->lrpcs.type = rpc_state.type_code;
1745 ai->lrpcs.vra = rpc_state.vra;
1746 ai->lrpcs.ucca = rpc_state.ucca;
1747 ai->lrpcs.region_mask = rpc_state.region_mask;
1748 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1da177e4
LT		 1749 break;
1750
1751 /* Set region settings */
1752 case DVD_HOST_SEND_RPC_STATE:
1753 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1754 setup_send_key(&cgc, 0, 6);
1755 buf[1] = 6;
1756 buf[4] = ai->hrpcs.pdrc;
1757
1758 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 1759 return ret;
1da177e4
LT		 1760 break;
1761
1762 default:
1763 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
fce53847 1764 return -ENOTTY;
1da177e4 1765 }
fce53847
FT		 1766
1767 return 0;
1da177e4
LT		 1768}
1769
d194139c
MS		 1770static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1771 struct packet_command *cgc)
1da177e4 1772{
fce53847 1773 unsigned char buf[21], *base;
1da177e4 1774 struct dvd_layer *layer;
1da177e4
LT		 1775 struct cdrom_device_ops *cdo = cdi->ops;
1776 int ret, layer_num = s->physical.layer_num;
1777
1778 if (layer_num >= DVD_LAYERS)
1779 return -EINVAL;
1780
d194139c
MS		 1781 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1782 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1783 cgc->cmd[6] = layer_num;
1784 cgc->cmd[7] = s->type;
1785 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4
LT		 1786
1787 /*
1788 * refrain from reporting errors on non-existing layers (mainly)
1789 */
d194139c 1790 cgc->quiet = 1;
1da177e4 1791
d194139c
MS		 1792 ret = cdo->generic_packet(cdi, cgc);
1793 if (ret)
fce53847 1794 return ret;
1da177e4
LT		 1795
1796 base = &buf[4];
1797 layer = &s->physical.layer[layer_num];
1798
1799 /*
1800 * place the data... really ugly, but at least we won't have to
1801 * worry about endianess in userspace.
1802 */
1803 memset(layer, 0, sizeof(*layer));
1804 layer->book_version = base[0] & 0xf;
1805 layer->book_type = base[0] >> 4;
1806 layer->min_rate = base[1] & 0xf;
1807 layer->disc_size = base[1] >> 4;
1808 layer->layer_type = base[2] & 0xf;
1809 layer->track_path = (base[2] >> 4) & 1;
1810 layer->nlayers = (base[2] >> 5) & 3;
1811 layer->track_density = base[3] & 0xf;
1812 layer->linear_density = base[3] >> 4;
1813 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1814 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1815 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1816 layer->bca = base[16] >> 7;
1817
fce53847 1818 return 0;
1da177e4
LT		 1819}
1820
d194139c
MS		 1821static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1822 struct packet_command *cgc)
1da177e4
LT		 1823{
1824 int ret;
fce53847 1825 u_char buf[8];
1da177e4
LT		 1826 struct cdrom_device_ops *cdo = cdi->ops;
1827
d194139c
MS		 1828 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1829 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1830 cgc->cmd[6] = s->copyright.layer_num;
1831 cgc->cmd[7] = s->type;
1832 cgc->cmd[8] = cgc->buflen >> 8;
1833 cgc->cmd[9] = cgc->buflen & 0xff;
1da177e4 1834
d194139c
MS		 1835 ret = cdo->generic_packet(cdi, cgc);
1836 if (ret)
fce53847 1837 return ret;
1da177e4
LT		 1838
1839 s->copyright.cpst = buf[4];
1840 s->copyright.rmi = buf[5];
1841
fce53847 1842 return 0;
1da177e4
LT		 1843}
1844
d194139c
MS		 1845static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1846 struct packet_command *cgc)
1da177e4
LT		 1847{
1848 int ret, size;
1849 u_char *buf;
1da177e4
LT		 1850 struct cdrom_device_ops *cdo = cdi->ops;
1851
1852 size = sizeof(s->disckey.value) + 4;
1853
d194139c
MS		 1854 buf = kmalloc(size, GFP_KERNEL);
1855 if (!buf)
1da177e4
LT		 1856 return -ENOMEM;
1857
d194139c
MS		 1858 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1859 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1860 cgc->cmd[7] = s->type;
1861 cgc->cmd[8] = size >> 8;
1862 cgc->cmd[9] = size & 0xff;
1863 cgc->cmd[10] = s->disckey.agid << 6;
1da177e4 1864
d194139c
MS		 1865 ret = cdo->generic_packet(cdi, cgc);
1866 if (!ret)
1da177e4
LT		 1867 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1868
1869 kfree(buf);
1870 return ret;
1871}
1872
d194139c
MS		 1873static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1874 struct packet_command *cgc)
1da177e4 1875{
d194139c
MS		 1876 int ret, size = 4 + 188;
1877 u_char *buf;
1da177e4
LT		 1878 struct cdrom_device_ops *cdo = cdi->ops;
1879
d194139c
MS		 1880 buf = kmalloc(size, GFP_KERNEL);
1881 if (!buf)
1882 return -ENOMEM;
1da177e4 1883
d194139c
MS		 1884 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1885 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1886 cgc->cmd[7] = s->type;
1887 cgc->cmd[9] = cgc->buflen & 0xff;
1888
1889 ret = cdo->generic_packet(cdi, cgc);
1890 if (ret)
1891 goto out;
1da177e4
LT		 1892
1893 s->bca.len = buf[0] << 8 | buf[1];
1894 if (s->bca.len < 12 || s->bca.len > 188) {
1895 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len);
d194139c
MS		 1896 ret = -EIO;
1897 goto out;
1da177e4
LT		 1898 }
1899 memcpy(s->bca.value, &buf[4], s->bca.len);
d194139c
MS		 1900 ret = 0;
1901out:
1902 kfree(buf);
1903 return ret;
1da177e4
LT		 1904}
1905
d194139c
MS		 1906static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1907 struct packet_command *cgc)
1da177e4
LT		 1908{
1909 int ret = 0, size;
1910 u_char *buf;
1da177e4
LT		 1911 struct cdrom_device_ops *cdo = cdi->ops;
1912
1913 size = sizeof(s->manufact.value) + 4;
1914
d194139c
MS		 1915 buf = kmalloc(size, GFP_KERNEL);
1916 if (!buf)
1da177e4
LT		 1917 return -ENOMEM;
1918
d194139c
MS		 1919 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1920 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1921 cgc->cmd[7] = s->type;
1922 cgc->cmd[8] = size >> 8;
1923 cgc->cmd[9] = size & 0xff;
1da177e4 1924
d194139c
MS		 1925 ret = cdo->generic_packet(cdi, cgc);
1926 if (ret)
1927 goto out;
1da177e4
LT		 1928
1929 s->manufact.len = buf[0] << 8 | buf[1];
1930 if (s->manufact.len < 0 || s->manufact.len > 2048) {
1931 cdinfo(CD_WARNING, "Received invalid manufacture info length"
1932 " (%d)\n", s->manufact.len);
1933 ret = -EIO;
1934 } else {
1935 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1936 }
1937
d194139c 1938out:
1da177e4
LT		 1939 kfree(buf);
1940 return ret;
1941}
1942
d194139c
MS		 1943static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1944 struct packet_command *cgc)
1da177e4
LT		 1945{
1946 switch (s->type) {
1947 case DVD_STRUCT_PHYSICAL:
d194139c 1948 return dvd_read_physical(cdi, s, cgc);
1da177e4
LT		 1949
1950 case DVD_STRUCT_COPYRIGHT:
d194139c 1951 return dvd_read_copyright(cdi, s, cgc);
1da177e4
LT		 1952
1953 case DVD_STRUCT_DISCKEY:
d194139c 1954 return dvd_read_disckey(cdi, s, cgc);
1da177e4
LT		 1955
1956 case DVD_STRUCT_BCA:
d194139c 1957 return dvd_read_bca(cdi, s, cgc);
1da177e4
LT		 1958
1959 case DVD_STRUCT_MANUFACT:
d194139c 1960 return dvd_read_manufact(cdi, s, cgc);
1da177e4
LT		 1961
1962 default:
1963 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1964 s->type);
1965 return -EINVAL;
1966 }
1967}
1968
1969int cdrom_mode_sense(struct cdrom_device_info *cdi,
1970 struct packet_command *cgc,
1971 int page_code, int page_control)
1972{
1973 struct cdrom_device_ops *cdo = cdi->ops;
1974
1975 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1976
1977 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1978 cgc->cmd[2] = page_code | (page_control << 6);
1979 cgc->cmd[7] = cgc->buflen >> 8;
1980 cgc->cmd[8] = cgc->buflen & 0xff;
1981 cgc->data_direction = CGC_DATA_READ;
1982 return cdo->generic_packet(cdi, cgc);
1983}
1984
1985int cdrom_mode_select(struct cdrom_device_info *cdi,
1986 struct packet_command *cgc)
1987{
1988 struct cdrom_device_ops *cdo = cdi->ops;
1989
1990 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1991 memset(cgc->buffer, 0, 2);
1992 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
1993 cgc->cmd[1] = 0x10; /* PF */
1994 cgc->cmd[7] = cgc->buflen >> 8;
1995 cgc->cmd[8] = cgc->buflen & 0xff;
1996 cgc->data_direction = CGC_DATA_WRITE;
1997 return cdo->generic_packet(cdi, cgc);
1998}
1999
2000static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2001 struct cdrom_subchnl *subchnl, int mcn)
2002{
2003 struct cdrom_device_ops *cdo = cdi->ops;
2004 struct packet_command cgc;
fce53847 2005 char buffer[32];
1da177e4
LT		 2006 int ret;
2007
2008 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2009 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2010 cgc.cmd[1] = 2; /* MSF addressing */
2011 cgc.cmd[2] = 0x40; /* request subQ data */
2012 cgc.cmd[3] = mcn ? 2 : 1;
2013 cgc.cmd[8] = 16;
2014
2015 if ((ret = cdo->generic_packet(cdi, &cgc)))
fce53847 2016 return ret;
1da177e4
LT		 2017
2018 subchnl->cdsc_audiostatus = cgc.buffer[1];
2019 subchnl->cdsc_format = CDROM_MSF;
2020 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2021 subchnl->cdsc_trk = cgc.buffer[6];
2022 subchnl->cdsc_ind = cgc.buffer[7];
2023
2024 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2025 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2026 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2027 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2028 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2029 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2030
fce53847 2031 return 0;
1da177e4
LT		 2032}
2033
2034/*
2035 * Specific READ_10 interface
2036 */
2037static int cdrom_read_cd(struct cdrom_device_info *cdi,
2038 struct packet_command *cgc, int lba,
2039 int blocksize, int nblocks)
2040{
2041 struct cdrom_device_ops *cdo = cdi->ops;
2042
2043 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2044 cgc->cmd[0] = GPCMD_READ_10;
2045 cgc->cmd[2] = (lba >> 24) & 0xff;
2046 cgc->cmd[3] = (lba >> 16) & 0xff;
2047 cgc->cmd[4] = (lba >> 8) & 0xff;
2048 cgc->cmd[5] = lba & 0xff;
2049 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2050 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2051 cgc->cmd[8] = nblocks & 0xff;
2052 cgc->buflen = blocksize * nblocks;
2053 return cdo->generic_packet(cdi, cgc);
2054}
2055
2056/* very generic interface for reading the various types of blocks */
2057static int cdrom_read_block(struct cdrom_device_info *cdi,
2058 struct packet_command *cgc,
2059 int lba, int nblocks, int format, int blksize)
2060{
2061 struct cdrom_device_ops *cdo = cdi->ops;
2062
2063 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2064 cgc->cmd[0] = GPCMD_READ_CD;
2065 /* expected sector size - cdda,mode1,etc. */
2066 cgc->cmd[1] = format << 2;
2067 /* starting address */
2068 cgc->cmd[2] = (lba >> 24) & 0xff;
2069 cgc->cmd[3] = (lba >> 16) & 0xff;
2070 cgc->cmd[4] = (lba >> 8) & 0xff;
2071 cgc->cmd[5] = lba & 0xff;
2072 /* number of blocks */
2073 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2074 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2075 cgc->cmd[8] = nblocks & 0xff;
2076 cgc->buflen = blksize * nblocks;
2077
2078 /* set the header info returned */
2079 switch (blksize) {
2080 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2081 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2082 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2083 default : cgc->cmd[9] = 0x10;
2084 }
2085
2086 return cdo->generic_packet(cdi, cgc);
2087}
2088
2089static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2090 int lba, int nframes)
2091{
2092 struct packet_command cgc;
2093 int ret = 0;
2094 int nr;
2095
2096 cdi->last_sense = 0;
2097
2098 memset(&cgc, 0, sizeof(cgc));
2099
2100 /*
2101 * start with will ra.nframes size, back down if alloc fails
2102 */
2103 nr = nframes;
2104 do {
2105 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2106 if (cgc.buffer)
2107 break;
2108
2109 nr >>= 1;
2110 } while (nr);
2111
2112 if (!nr)
2113 return -ENOMEM;
2114
2115 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) {
2116 ret = -EFAULT;
2117 goto out;
2118 }
2119
2120 cgc.data_direction = CGC_DATA_READ;
2121 while (nframes > 0) {
2122 if (nr > nframes)
2123 nr = nframes;
2124
2125 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2126 if (ret)
2127 break;
2128 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2129 ret = -EFAULT;
2130 break;
2131 }
2132 ubuf += CD_FRAMESIZE_RAW * nr;
2133 nframes -= nr;
2134 lba += nr;
2135 }
2136out:
2137 kfree(cgc.buffer);
2138 return ret;
2139}
2140
2141static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2142 int lba, int nframes)
2143{
165125e1 2144 struct request_queue *q = cdi->disk->queue;
1da177e4
LT		 2145 struct request *rq;
2146 struct bio *bio;
2147 unsigned int len;
2148 int nr, ret = 0;
2149
2150 if (!q)
2151 return -ENXIO;
2152
2153 cdi->last_sense = 0;
2154
2155 while (nframes) {
2156 nr = nframes;
2157 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2158 nr = 1;
ae03bf63
MP		 2159 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2160 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
1da177e4
LT		 2161
2162 len = nr * CD_FRAMESIZE_RAW;
2163
febd7a5c
AB		 2164 rq = blk_get_request(q, READ, GFP_KERNEL);
2165 if (!rq) {
2166 ret = -ENOMEM;
2167 break;
2168 }
2169
152e283f 2170 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
febd7a5c
AB		 2171 if (ret) {
2172 blk_put_request(rq);
dd1cab95 2173 break;
febd7a5c 2174 }
1da177e4 2175
1da177e4
LT		 2176 rq->cmd[0] = GPCMD_READ_CD;
2177 rq->cmd[1] = 1 << 2;
2178 rq->cmd[2] = (lba >> 24) & 0xff;
2179 rq->cmd[3] = (lba >> 16) & 0xff;
2180 rq->cmd[4] = (lba >> 8) & 0xff;
2181 rq->cmd[5] = lba & 0xff;
2182 rq->cmd[6] = (nr >> 16) & 0xff;
2183 rq->cmd[7] = (nr >> 8) & 0xff;
2184 rq->cmd[8] = nr & 0xff;
2185 rq->cmd[9] = 0xf8;
2186
2187 rq->cmd_len = 12;
4aff5e23 2188 rq->cmd_type = REQ_TYPE_BLOCK_PC;
1da177e4
LT		 2189 rq->timeout = 60 * HZ;
2190 bio = rq->bio;
2191
994ca9a1 2192 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
1da177e4
LT		 2193 struct request_sense *s = rq->sense;
2194 ret = -EIO;
2195 cdi->last_sense = s->sense_key;
2196 }
2197
8e5cfc45 2198 if (blk_rq_unmap_user(bio))
1da177e4 2199 ret = -EFAULT;
febd7a5c 2200 blk_put_request(rq);
1da177e4
LT		 2201
2202 if (ret)
2203 break;
2204
2205 nframes -= nr;
2206 lba += nr;
2207 ubuf += len;
2208 }
2209
2210 return ret;
2211}
2212
2213static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2214 int lba, int nframes)
2215{
2216 int ret;
2217
2218 if (cdi->cdda_method == CDDA_OLD)
2219 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2220
2221retry:
2222 /*
2223 * for anything else than success and io error, we need to retry
2224 */
2225 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2226 if (!ret || ret != -EIO)
2227 return ret;
2228
2229 /*
2230 * I've seen drives get sense 4/8/3 udma crc errors on multi
2231 * frame dma, so drop to single frame dma if we need to
2232 */
2233 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
e597cd09 2234 pr_info("dropping to single frame dma\n");
1da177e4
LT		 2235 cdi->cdda_method = CDDA_BPC_SINGLE;
2236 goto retry;
2237 }
2238
2239 /*
2240 * so we have an io error of some sort with multi frame dma. if the
2241 * condition wasn't a hardware error
2242 * problems, not for any error
2243 */
2244 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2245 return ret;
2246
e597cd09 2247 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
1da177e4
LT		 2248 cdi->cdda_method = CDDA_OLD;
2249 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2250}
2251
d2c5d4fc
CH		 2252static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2253 void __user *argp)
1da177e4 2254{
d2c5d4fc
CH		 2255 struct cdrom_multisession ms_info;
2256 u8 requested_format;
1da177e4
LT		 2257 int ret;
2258
d2c5d4fc
CH		 2259 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2260
2261 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2262 return -ENOSYS;
2263
2264 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2265 return -EFAULT;
2266
2267 requested_format = ms_info.addr_format;
2268 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2269 return -EINVAL;
2270 ms_info.addr_format = CDROM_LBA;
2271
2272 ret = cdi->ops->get_last_session(cdi, &ms_info);
2273 if (ret)
1da177e4
LT		 2274 return ret;
2275
d2c5d4fc
CH		 2276 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2277
2278 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2279 return -EFAULT;
2280
2281 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2282 return 0;
2283}
2284
2285static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2286{
2287 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n");
2288
2289 if (!CDROM_CAN(CDC_OPEN_TRAY))
2290 return -ENOSYS;
2291 if (cdi->use_count != 1 || keeplocked)
2292 return -EBUSY;
2293 if (CDROM_CAN(CDC_LOCK)) {
2294 int ret = cdi->ops->lock_door(cdi, 0);
2295 if (ret)
1da177e4 2296 return ret;
d2c5d4fc 2297 }
1da177e4 2298
d2c5d4fc
CH		 2299 return cdi->ops->tray_move(cdi, 1);
2300}
1da177e4 2301
d2c5d4fc
CH		 2302static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2303{
2304 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
1da177e4 2305
d2c5d4fc
CH		 2306 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2307 return -ENOSYS;
2308 return cdi->ops->tray_move(cdi, 0);
2309}
1da177e4 2310
d2c5d4fc
CH		 2311static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2312 unsigned long arg)
2313{
2314 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
1da177e4 2315
d2c5d4fc
CH		 2316 if (!CDROM_CAN(CDC_OPEN_TRAY))
2317 return -ENOSYS;
2318 if (keeplocked)
2319 return -EBUSY;
1da177e4 2320
d2c5d4fc
CH		 2321 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2322 if (arg)
2323 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2324 return 0;
2325}
1da177e4 2326
d2c5d4fc
CH		 2327static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2328 unsigned long arg)
2329{
2330 struct cdrom_changer_info *info;
2331 int ret;
1da177e4 2332
d2c5d4fc 2333 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
1da177e4 2334
d2c5d4fc
CH		 2335 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2336 return -ENOSYS;
1da177e4 2337
d2c5d4fc
CH		 2338 /* cannot select disc or select current disc */
2339 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2340 return media_changed(cdi, 1);
1da177e4 2341
d2c5d4fc
CH		 2342 if ((unsigned int)arg >= cdi->capacity)
2343 return -EINVAL;
1da177e4 2344
d2c5d4fc
CH		 2345 info = kmalloc(sizeof(*info), GFP_KERNEL);
2346 if (!info)
2347 return -ENOMEM;
1da177e4 2348
d2c5d4fc
CH		 2349 ret = cdrom_read_mech_status(cdi, info);
2350 if (!ret)
2351 ret = info->slots[arg].change;
2352 kfree(info);
2353 return ret;
2354}
1da177e4 2355
d2c5d4fc
CH		 2356static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2357 unsigned long arg)
2358{
2359 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
1da177e4 2360
d2c5d4fc
CH		 2361 /*
2362 * Options need to be in sync with capability.
2363 * Too late for that, so we have to check each one separately.
2364 */
2365 switch (arg) {
2366 case CDO_USE_FFLAGS:
2367 case CDO_CHECK_TYPE:
2368 break;
2369 case CDO_LOCK:
2370 if (!CDROM_CAN(CDC_LOCK))
2371 return -ENOSYS;
2372 break;
2373 case 0:
2374 return cdi->options;
2375 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2376 default:
2377 if (!CDROM_CAN(arg))
1da177e4 2378 return -ENOSYS;
d2c5d4fc
CH		 2379 }
2380 cdi->options |= (int) arg;
2381 return cdi->options;
2382}
1da177e4 2383
d2c5d4fc
CH		 2384static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2385 unsigned long arg)
2386{
2387 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
1da177e4 2388
d2c5d4fc
CH		 2389 cdi->options &= ~(int) arg;
2390 return cdi->options;
2391}
1da177e4 2392
d2c5d4fc
CH		 2393static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2394 unsigned long arg)
2395{
2396 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
1da177e4 2397
d2c5d4fc
CH		 2398 if (!CDROM_CAN(CDC_SELECT_SPEED))
2399 return -ENOSYS;
2400 return cdi->ops->select_speed(cdi, arg);
2401}
1da177e4 2402
d2c5d4fc
CH		 2403static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2404 unsigned long arg)
2405{
2406 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2407
2408 if (!CDROM_CAN(CDC_SELECT_DISC))
2409 return -ENOSYS;
2410
2411 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2412 if ((int)arg >= cdi->capacity)
2413 return -EINVAL;
2414 }
2415
2416 /*
2417 * ->select_disc is a hook to allow a driver-specific way of
2418 * seleting disc. However, since there is no equivalent hook for
2419 * cdrom_slot_status this may not actually be useful...
2420 */
2421 if (cdi->ops->select_disc)
2422 return cdi->ops->select_disc(cdi, arg);
2423
2424 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2425 return cdrom_select_disc(cdi, arg);
2426}
2427
2428static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2429 struct block_device *bdev)
2430{
2431 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n");
2432
2433 if (!capable(CAP_SYS_ADMIN))
2434 return -EACCES;
2435 if (!CDROM_CAN(CDC_RESET))
2436 return -ENOSYS;
f98393a6 2437 invalidate_bdev(bdev);
d2c5d4fc
CH		 2438 return cdi->ops->reset(cdi);
2439}
2440
2441static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2442 unsigned long arg)
2443{
2444 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl");
2445
2446 if (!CDROM_CAN(CDC_LOCK))
2447 return -EDRIVE_CANT_DO_THIS;
2448
2449 keeplocked = arg ? 1 : 0;
2450
2451 /*
2452 * Don't unlock the door on multiple opens by default, but allow
2453 * root to do so.
2454 */
2455 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2456 return -EBUSY;
2457 return cdi->ops->lock_door(cdi, arg);
2458}
2459
2460static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2461 unsigned long arg)
2462{
2463 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis");
2464
2465 if (!capable(CAP_SYS_ADMIN))
2466 return -EACCES;
2467 debug = arg ? 1 : 0;
2468 return debug;
2469}
1da177e4 2470
d2c5d4fc
CH		 2471static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2472{
2473 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2474 return (cdi->ops->capability & ~cdi->mask);
2475}
2476
2477/*
2478 * The following function is implemented, although very few audio
1da177e4
LT		 2479 * discs give Universal Product Code information, which should just be
2480 * the Medium Catalog Number on the box. Note, that the way the code
2481 * is written on the CD is /not/ uniform across all discs!
2482 */
d2c5d4fc
CH		 2483static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2484 void __user *argp)
2485{
2486 struct cdrom_mcn mcn;
2487 int ret;
1da177e4 2488
d2c5d4fc 2489 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
1da177e4 2490
d2c5d4fc
CH		 2491 if (!(cdi->ops->capability & CDC_MCN))
2492 return -ENOSYS;
2493 ret = cdi->ops->get_mcn(cdi, &mcn);
2494 if (ret)
2495 return ret;
1da177e4 2496
d2c5d4fc
CH		 2497 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2498 return -EFAULT;
2499 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2500 return 0;
2501}
1da177e4 2502
d2c5d4fc
CH		 2503static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2504 unsigned long arg)
2505{
2506 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2507
2508 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2509 return -ENOSYS;
2510 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2511 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2512 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2513 if (((int)arg >= cdi->capacity))
2514 return -EINVAL;
2515 return cdrom_slot_status(cdi, arg);
2516}
2517
2518/*
2519 * Ok, this is where problems start. The current interface for the
2520 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2521 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this
2522 * is often the case, it is also very common for CDs to have some tracks
2523 * with data, and some tracks with audio. Just because I feel like it,
2524 * I declare the following to be the best way to cope. If the CD has ANY
2525 * data tracks on it, it will be returned as a data CD. If it has any XA
2526 * tracks, I will return it as that. Now I could simplify this interface
2527 * by combining these returns with the above, but this more clearly
2528 * demonstrates the problem with the current interface. Too bad this
2529 * wasn't designed to use bitmasks... -Erik
2530 *
2531 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2532 * User level programmers might feel the ioctl is not very useful.
2533 * ---david
2534 */
2535static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2536{
2537 tracktype tracks;
2538
2539 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2540
2541 cdrom_count_tracks(cdi, &tracks);
2542 if (tracks.error)
2543 return tracks.error;
2544
2545 /* Policy mode on */
2546 if (tracks.audio > 0) {
2547 if (!tracks.data && !tracks.cdi && !tracks.xa)
2548 return CDS_AUDIO;
2549 else
2550 return CDS_MIXED;
1da177e4
LT		 2551 }
2552
d2c5d4fc
CH		 2553 if (tracks.cdi > 0)
2554 return CDS_XA_2_2;
2555 if (tracks.xa > 0)
2556 return CDS_XA_2_1;
2557 if (tracks.data > 0)
2558 return CDS_DATA_1;
2559 /* Policy mode off */
2560
2561 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n");
2562 return CDS_NO_INFO;
2563}
2564
2565static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2566{
2567 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2568 return cdi->capacity;
2569}
2570
2571static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2572 void __user *argp)
2573{
2574 struct cdrom_subchnl q;
2575 u8 requested, back;
2576 int ret;
2577
2578 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2579
d2c5d4fc
CH		 2580 if (copy_from_user(&q, argp, sizeof(q)))
2581 return -EFAULT;
2582
2583 requested = q.cdsc_format;
2584 if (requested != CDROM_MSF && requested != CDROM_LBA)
2585 return -EINVAL;
2586 q.cdsc_format = CDROM_MSF;
2587
2588 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2589 if (ret)
2590 return ret;
2591
2592 back = q.cdsc_format; /* local copy */
2593 sanitize_format(&q.cdsc_absaddr, &back, requested);
2594 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2595
2596 if (copy_to_user(argp, &q, sizeof(q)))
2597 return -EFAULT;
2598 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2599 return 0;
2600}
2601
2602static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2603 void __user *argp)
2604{
2605 struct cdrom_tochdr header;
2606 int ret;
2607
2608 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2609
d2c5d4fc
CH		 2610 if (copy_from_user(&header, argp, sizeof(header)))
2611 return -EFAULT;
2612
2613 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2614 if (ret)
2615 return ret;
2616
2617 if (copy_to_user(argp, &header, sizeof(header)))
2618 return -EFAULT;
2619 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2620 return 0;
2621}
2622
2623static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2624 void __user *argp)
2625{
2626 struct cdrom_tocentry entry;
2627 u8 requested_format;
2628 int ret;
2629
2630 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2631
d2c5d4fc
CH		 2632 if (copy_from_user(&entry, argp, sizeof(entry)))
2633 return -EFAULT;
2634
2635 requested_format = entry.cdte_format;
2636 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2637 return -EINVAL;
2638 /* make interface to low-level uniform */
2639 entry.cdte_format = CDROM_MSF;
2640 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2641 if (ret)
2642 return ret;
2643 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2644
2645 if (copy_to_user(argp, &entry, sizeof(entry)))
2646 return -EFAULT;
2647 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2648 return 0;
2649}
2650
2651static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2652 void __user *argp)
2653{
2654 struct cdrom_msf msf;
2655
2656 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2657
2658 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2659 return -ENOSYS;
2660 if (copy_from_user(&msf, argp, sizeof(msf)))
2661 return -EFAULT;
2662 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2663}
2664
2665static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2666 void __user *argp)
2667{
2668 struct cdrom_ti ti;
2669 int ret;
2670
2671 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2672
2673 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2674 return -ENOSYS;
2675 if (copy_from_user(&ti, argp, sizeof(ti)))
2676 return -EFAULT;
2677
2678 ret = check_for_audio_disc(cdi, cdi->ops);
2679 if (ret)
2680 return ret;
2681 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2682}
2683static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2684 void __user *argp)
2685{
2686 struct cdrom_volctrl volume;
2687
2688 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2689
2690 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2691 return -ENOSYS;
2692 if (copy_from_user(&volume, argp, sizeof(volume)))
2693 return -EFAULT;
2694 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2695}
2696
2697static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2698 void __user *argp)
2699{
2700 struct cdrom_volctrl volume;
2701 int ret;
2702
2703 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2704
2705 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2706 return -ENOSYS;
2707
2708 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2709 if (ret)
2710 return ret;
2711
2712 if (copy_to_user(argp, &volume, sizeof(volume)))
2713 return -EFAULT;
2714 return 0;
2715}
2716
2717static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2718 unsigned int cmd)
2719{
2720 int ret;
2721
2722 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2723
2724 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2725 return -ENOSYS;
2726 ret = check_for_audio_disc(cdi, cdi->ops);
2727 if (ret)
2728 return ret;
2729 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2730}
2731
2732/*
2733 * Just about every imaginable ioctl is supported in the Uniform layer
2734 * these days.
2735 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
2736 */
bbc1cc97
AV		 2737int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
2738 fmode_t mode, unsigned int cmd, unsigned long arg)
d2c5d4fc
CH		 2739{
2740 void __user *argp = (void __user *)arg;
2741 int ret;
bbc1cc97 2742 struct gendisk *disk = bdev->bd_disk;
d2c5d4fc
CH		 2743
2744 /*
2745 * Try the generic SCSI command ioctl's first.
2746 */
bbc1cc97 2747 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp);
d2c5d4fc
CH		 2748 if (ret != -ENOTTY)
2749 return ret;
2750
2751 switch (cmd) {
2752 case CDROMMULTISESSION:
2753 return cdrom_ioctl_multisession(cdi, argp);
2754 case CDROMEJECT:
2755 return cdrom_ioctl_eject(cdi);
2756 case CDROMCLOSETRAY:
2757 return cdrom_ioctl_closetray(cdi);
2758 case CDROMEJECT_SW:
2759 return cdrom_ioctl_eject_sw(cdi, arg);
2760 case CDROM_MEDIA_CHANGED:
2761 return cdrom_ioctl_media_changed(cdi, arg);
2762 case CDROM_SET_OPTIONS:
2763 return cdrom_ioctl_set_options(cdi, arg);
2764 case CDROM_CLEAR_OPTIONS:
2765 return cdrom_ioctl_clear_options(cdi, arg);
2766 case CDROM_SELECT_SPEED:
2767 return cdrom_ioctl_select_speed(cdi, arg);
2768 case CDROM_SELECT_DISC:
2769 return cdrom_ioctl_select_disc(cdi, arg);
2770 case CDROMRESET:
bbc1cc97 2771 return cdrom_ioctl_reset(cdi, bdev);
d2c5d4fc
CH		 2772 case CDROM_LOCKDOOR:
2773 return cdrom_ioctl_lock_door(cdi, arg);
2774 case CDROM_DEBUG:
2775 return cdrom_ioctl_debug(cdi, arg);
2776 case CDROM_GET_CAPABILITY:
2777 return cdrom_ioctl_get_capability(cdi);
2778 case CDROM_GET_MCN:
2779 return cdrom_ioctl_get_mcn(cdi, argp);
2780 case CDROM_DRIVE_STATUS:
2781 return cdrom_ioctl_drive_status(cdi, arg);
2782 case CDROM_DISC_STATUS:
2783 return cdrom_ioctl_disc_status(cdi);
2784 case CDROM_CHANGER_NSLOTS:
2785 return cdrom_ioctl_changer_nslots(cdi);
2786 }
2787
2788 /*
2789 * Use the ioctls that are implemented through the generic_packet()
2790 * interface. this may look at bit funny, but if -ENOTTY is
2791 * returned that particular ioctl is not implemented and we
2792 * let it go through the device specific ones.
2793 */
1da177e4
LT		 2794 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
2795 ret = mmc_ioctl(cdi, cmd, arg);
d2c5d4fc 2796 if (ret != -ENOTTY)
1da177e4 2797 return ret;
1da177e4
LT		 2798 }
2799
d2c5d4fc
CH		 2800 /*
2801 * Note: most of the cdinfo() calls are commented out here,
2802 * because they fill up the sys log when CD players poll
2803 * the drive.
2804 */
1da177e4 2805 switch (cmd) {
d2c5d4fc
CH		 2806 case CDROMSUBCHNL:
2807 return cdrom_ioctl_get_subchnl(cdi, argp);
2808 case CDROMREADTOCHDR:
2809 return cdrom_ioctl_read_tochdr(cdi, argp);
2810 case CDROMREADTOCENTRY:
2811 return cdrom_ioctl_read_tocentry(cdi, argp);
2812 case CDROMPLAYMSF:
2813 return cdrom_ioctl_play_msf(cdi, argp);
2814 case CDROMPLAYTRKIND:
2815 return cdrom_ioctl_play_trkind(cdi, argp);
2816 case CDROMVOLCTRL:
2817 return cdrom_ioctl_volctrl(cdi, argp);
2818 case CDROMVOLREAD:
2819 return cdrom_ioctl_volread(cdi, argp);
1da177e4
LT		 2820 case CDROMSTART:
2821 case CDROMSTOP:
2822 case CDROMPAUSE:
d2c5d4fc
CH		 2823 case CDROMRESUME:
2824 return cdrom_ioctl_audioctl(cdi, cmd);
2825 }
1da177e4 2826
1da177e4
LT		 2827 return -ENOSYS;
2828}
2829
1da177e4
LT		 2830/*
2831 * Required when we need to use READ_10 to issue other than 2048 block
2832 * reads
2833 */
2834static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2835{
2836 struct cdrom_device_ops *cdo = cdi->ops;
2837 struct packet_command cgc;
2838 struct modesel_head mh;
2839
2840 memset(&mh, 0, sizeof(mh));
2841 mh.block_desc_length = 0x08;
2842 mh.block_length_med = (size >> 8) & 0xff;
2843 mh.block_length_lo = size & 0xff;
2844
2845 memset(&cgc, 0, sizeof(cgc));
2846 cgc.cmd[0] = 0x15;
2847 cgc.cmd[1] = 1 << 4;
2848 cgc.cmd[4] = 12;
2849 cgc.buflen = sizeof(mh);
2850 cgc.buffer = (char *) &mh;
2851 cgc.data_direction = CGC_DATA_WRITE;
2852 mh.block_desc_length = 0x08;
2853 mh.block_length_med = (size >> 8) & 0xff;
2854 mh.block_length_lo = size & 0xff;
2855
2856 return cdo->generic_packet(cdi, &cgc);
2857}
2858
3147c531
MS		 2859static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2860 void __user *arg,
2861 struct packet_command *cgc,
2862 int cmd)
2863{
1da177e4 2864 struct request_sense sense;
3147c531
MS		 2865 struct cdrom_msf msf;
2866 int blocksize = 0, format = 0, lba;
2867 int ret;
1da177e4 2868
1da177e4
LT		 2869 switch (cmd) {
2870 case CDROMREADRAW:
3147c531
MS		 2871 blocksize = CD_FRAMESIZE_RAW;
2872 break;
1da177e4 2873 case CDROMREADMODE1:
3147c531
MS		 2874 blocksize = CD_FRAMESIZE;
2875 format = 2;
2876 break;
2877 case CDROMREADMODE2:
2878 blocksize = CD_FRAMESIZE_RAW0;
2879 break;
2880 }
2881 IOCTL_IN(arg, struct cdrom_msf, msf);
2882 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2883 /* FIXME: we need upper bound checking, too!! */
2884 if (lba < 0)
2885 return -EINVAL;
2886
2887 cgc->buffer = kmalloc(blocksize, GFP_KERNEL);
2888 if (cgc->buffer == NULL)
2889 return -ENOMEM;
2890
2891 memset(&sense, 0, sizeof(sense));
2892 cgc->sense = &sense;
2893 cgc->data_direction = CGC_DATA_READ;
2894 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2895 if (ret && sense.sense_key == 0x05 &&
2896 sense.asc == 0x20 &&
2897 sense.ascq == 0x00) {
2898 /*
2899 * SCSI-II devices are not required to support
2900 * READ_CD, so let's try switching block size
2901 */
2902 /* FIXME: switch back again... */
2903 ret = cdrom_switch_blocksize(cdi, blocksize);
2904 if (ret)
2905 goto out;
2906 cgc->sense = NULL;
2907 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2908 ret |= cdrom_switch_blocksize(cdi, blocksize);
2909 }
2910 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2911 ret = -EFAULT;
2912out:
2913 kfree(cgc->buffer);
2914 return ret;
2915}
2916
2917static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2918 void __user *arg)
2919{
2920 struct cdrom_read_audio ra;
2921 int lba;
2922
2923 IOCTL_IN(arg, struct cdrom_read_audio, ra);
2924
2925 if (ra.addr_format == CDROM_MSF)
2926 lba = msf_to_lba(ra.addr.msf.minute,
2927 ra.addr.msf.second,
2928 ra.addr.msf.frame);
2929 else if (ra.addr_format == CDROM_LBA)
2930 lba = ra.addr.lba;
2931 else
2932 return -EINVAL;
2933
2934 /* FIXME: we need upper bound checking, too!! */
2935 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
2936 return -EINVAL;
2937
2938 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
2939}
2940
2941static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
2942 void __user *arg)
2943{
2944 int ret;
2945 struct cdrom_subchnl q;
2946 u_char requested, back;
2947 IOCTL_IN(arg, struct cdrom_subchnl, q);
2948 requested = q.cdsc_format;
2949 if (!((requested == CDROM_MSF) ||
2950 (requested == CDROM_LBA)))
2951 return -EINVAL;
2952 q.cdsc_format = CDROM_MSF;
2953 ret = cdrom_read_subchannel(cdi, &q, 0);
2954 if (ret)
1da177e4 2955 return ret;
3147c531
MS		 2956 back = q.cdsc_format; /* local copy */
2957 sanitize_format(&q.cdsc_absaddr, &back, requested);
2958 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2959 IOCTL_OUT(arg, struct cdrom_subchnl, q);
2960 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2961 return 0;
2962}
1da177e4 2963
3147c531
MS		 2964static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
2965 void __user *arg,
2966 struct packet_command *cgc)
2967{
2968 struct cdrom_device_ops *cdo = cdi->ops;
2969 struct cdrom_msf msf;
2970 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2971 IOCTL_IN(arg, struct cdrom_msf, msf);
2972 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
2973 cgc->cmd[3] = msf.cdmsf_min0;
2974 cgc->cmd[4] = msf.cdmsf_sec0;
2975 cgc->cmd[5] = msf.cdmsf_frame0;
2976 cgc->cmd[6] = msf.cdmsf_min1;
2977 cgc->cmd[7] = msf.cdmsf_sec1;
2978 cgc->cmd[8] = msf.cdmsf_frame1;
2979 cgc->data_direction = CGC_DATA_NONE;
2980 return cdo->generic_packet(cdi, cgc);
2981}
1da177e4 2982
3147c531
MS		 2983static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
2984 void __user *arg,
2985 struct packet_command *cgc)
2986{
2987 struct cdrom_device_ops *cdo = cdi->ops;
2988 struct cdrom_blk blk;
2989 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
2990 IOCTL_IN(arg, struct cdrom_blk, blk);
2991 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
2992 cgc->cmd[2] = (blk.from >> 24) & 0xff;
2993 cgc->cmd[3] = (blk.from >> 16) & 0xff;
2994 cgc->cmd[4] = (blk.from >> 8) & 0xff;
2995 cgc->cmd[5] = blk.from & 0xff;
2996 cgc->cmd[7] = (blk.len >> 8) & 0xff;
2997 cgc->cmd[8] = blk.len & 0xff;
2998 cgc->data_direction = CGC_DATA_NONE;
2999 return cdo->generic_packet(cdi, cgc);
3000}
1da177e4 3001
3147c531
MS		 3002static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3003 void __user *arg,
3004 struct packet_command *cgc,
3005 unsigned int cmd)
3006{
3007 struct cdrom_volctrl volctrl;
3008 unsigned char buffer[32];
3009 char mask[sizeof(buffer)];
3010 unsigned short offset;
3011 int ret;
3012
3013 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n");
1da177e4 3014
3147c531 3015 IOCTL_IN(arg, struct cdrom_volctrl, volctrl);
1da177e4 3016
3147c531
MS		 3017 cgc->buffer = buffer;
3018 cgc->buflen = 24;
3019 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3020 if (ret)
3021 return ret;
1da177e4 3022
3147c531
MS		 3023 /* originally the code depended on buffer[1] to determine
3024 how much data is available for transfer. buffer[1] is
3025 unfortunately ambigious and the only reliable way seem
3026 to be to simply skip over the block descriptor... */
3027 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3028
3029 if (offset + 16 > sizeof(buffer))
3030 return -E2BIG;
3031
3032 if (offset + 16 > cgc->buflen) {
3033 cgc->buflen = offset + 16;
3034 ret = cdrom_mode_sense(cdi, cgc,
3035 GPMODE_AUDIO_CTL_PAGE, 0);
3036 if (ret)
3037 return ret;
3038 }
1da177e4 3039
3147c531
MS		 3040 /* sanity check */
3041 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3042 buffer[offset + 1] < 14)
3043 return -EINVAL;
1da177e4 3044
3147c531
MS		 3045 /* now we have the current volume settings. if it was only
3046 a CDROMVOLREAD, return these values */
3047 if (cmd == CDROMVOLREAD) {
3048 volctrl.channel0 = buffer[offset+9];
3049 volctrl.channel1 = buffer[offset+11];
3050 volctrl.channel2 = buffer[offset+13];
3051 volctrl.channel3 = buffer[offset+15];
3052 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl);
3053 return 0;
3054 }
1da177e4 3055
3147c531
MS		 3056 /* get the volume mask */
3057 cgc->buffer = mask;
3058 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3059 if (ret)
3060 return ret;
1da177e4 3061
3147c531
MS		 3062 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3063 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3064 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3065 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
1da177e4 3066
3147c531
MS		 3067 /* set volume */
3068 cgc->buffer = buffer + offset - 8;
3069 memset(cgc->buffer, 0, 8);
3070 return cdrom_mode_select(cdi, cgc);
3071}
1da177e4 3072
3147c531
MS		 3073static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3074 struct packet_command *cgc,
3075 int cmd)
3076{
3077 struct cdrom_device_ops *cdo = cdi->ops;
3078 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3079 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3080 cgc->cmd[1] = 1;
3081 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3082 cgc->data_direction = CGC_DATA_NONE;
3083 return cdo->generic_packet(cdi, cgc);
3084}
1da177e4 3085
3147c531
MS		 3086static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3087 struct packet_command *cgc,
3088 int cmd)
3089{
3090 struct cdrom_device_ops *cdo = cdi->ops;
3091 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3092 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3093 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3094 cgc->data_direction = CGC_DATA_NONE;
3095 return cdo->generic_packet(cdi, cgc);
3096}
1da177e4 3097
3147c531 3098static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
d194139c
MS		 3099 void __user *arg,
3100 struct packet_command *cgc)
3147c531
MS		 3101{
3102 int ret;
3103 dvd_struct *s;
3104 int size = sizeof(dvd_struct);
3105
3106 if (!CDROM_CAN(CDC_DVD))
3107 return -ENOSYS;
3108
3109 s = kmalloc(size, GFP_KERNEL);
3110 if (!s)
3111 return -ENOMEM;
3112
3113 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3114 if (copy_from_user(s, arg, size)) {
1da177e4 3115 kfree(s);
3147c531
MS		 3116 return -EFAULT;
3117 }
3118
d194139c 3119 ret = dvd_read_struct(cdi, s, cgc);
3147c531
MS		 3120 if (ret)
3121 goto out;
3122
3123 if (copy_to_user(arg, s, size))
3124 ret = -EFAULT;
3125out:
3126 kfree(s);
3127 return ret;
3128}
3129
3130static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3131 void __user *arg)
3132{
3133 int ret;
3134 dvd_authinfo ai;
3135 if (!CDROM_CAN(CDC_DVD))
3136 return -ENOSYS;
3137 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n");
3138 IOCTL_IN(arg, dvd_authinfo, ai);
3139 ret = dvd_do_auth(cdi, &ai);
3140 if (ret)
1da177e4 3141 return ret;
3147c531
MS		 3142 IOCTL_OUT(arg, dvd_authinfo, ai);
3143 return 0;
3144}
1da177e4 3145
3147c531
MS		 3146static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3147 void __user *arg)
3148{
3149 int ret;
3150 long next = 0;
3151 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3152 ret = cdrom_get_next_writable(cdi, &next);
3153 if (ret)
3154 return ret;
3155 IOCTL_OUT(arg, long, next);
3156 return 0;
3157}
1da177e4 3158
3147c531
MS		 3159static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3160 void __user *arg)
3161{
3162 int ret;
3163 long last = 0;
3164 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3165 ret = cdrom_get_last_written(cdi, &last);
3166 if (ret)
3167 return ret;
3168 IOCTL_OUT(arg, long, last);
3169 return 0;
3170}
3171
3172static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3173 unsigned long arg)
3174{
3175 struct packet_command cgc;
3176 void __user *userptr = (void __user *)arg;
3177
3178 memset(&cgc, 0, sizeof(cgc));
3179
3180 /* build a unified command and queue it through
3181 cdo->generic_packet() */
3182 switch (cmd) {
3183 case CDROMREADRAW:
3184 case CDROMREADMODE1:
3185 case CDROMREADMODE2:
3186 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3187 case CDROMREADAUDIO:
3188 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3189 case CDROMSUBCHNL:
3190 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3191 case CDROMPLAYMSF:
3192 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3193 case CDROMPLAYBLK:
3194 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3195 case CDROMVOLCTRL:
3196 case CDROMVOLREAD:
3197 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3198 case CDROMSTART:
3199 case CDROMSTOP:
3200 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3201 case CDROMPAUSE:
3202 case CDROMRESUME:
3203 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3204 case DVD_READ_STRUCT:
d194139c 3205 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3147c531
MS		 3206 case DVD_AUTH:
3207 return mmc_ioctl_dvd_auth(cdi, userptr);
3208 case CDROM_NEXT_WRITABLE:
3209 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3210 case CDROM_LAST_WRITTEN:
3211 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3212 }
1da177e4
LT		 3213
3214 return -ENOTTY;
3215}
3216
3217static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type,
3218 track_information *ti)
3219{
3220 struct cdrom_device_ops *cdo = cdi->ops;
3221 struct packet_command cgc;
3222 int ret, buflen;
3223
3224 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
3225 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
3226 cgc.cmd[1] = type & 3;
3227 cgc.cmd[4] = (track & 0xff00) >> 8;
3228 cgc.cmd[5] = track & 0xff;
3229 cgc.cmd[8] = 8;
3230 cgc.quiet = 1;
3231
3232 if ((ret = cdo->generic_packet(cdi, &cgc)))
3233 return ret;
3234
3235 buflen = be16_to_cpu(ti->track_information_length) +
3236 sizeof(ti->track_information_length);
3237
3238 if (buflen > sizeof(track_information))
3239 buflen = sizeof(track_information);
3240
3241 cgc.cmd[8] = cgc.buflen = buflen;
3242 if ((ret = cdo->generic_packet(cdi, &cgc)))
3243 return ret;
3244
3245 /* return actual fill size */
3246 return buflen;
3247}
3248
3249/* requires CD R/RW */
3250static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di)
3251{
3252 struct cdrom_device_ops *cdo = cdi->ops;
3253 struct packet_command cgc;
3254 int ret, buflen;
3255
3256 /* set up command and get the disc info */
3257 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
3258 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
3259 cgc.cmd[8] = cgc.buflen = 2;
3260 cgc.quiet = 1;
3261
3262 if ((ret = cdo->generic_packet(cdi, &cgc)))
3263 return ret;
3264
3265 /* not all drives have the same disc_info length, so requeue
3266 * packet with the length the drive tells us it can supply
3267 */
3268 buflen = be16_to_cpu(di->disc_information_length) +
3269 sizeof(di->disc_information_length);
3270
3271 if (buflen > sizeof(disc_information))
3272 buflen = sizeof(disc_information);
3273
3274 cgc.cmd[8] = cgc.buflen = buflen;
3275 if ((ret = cdo->generic_packet(cdi, &cgc)))
3276 return ret;
3277
3278 /* return actual fill size */
3279 return buflen;
3280}
3281
3282/* return the last written block on the CD-R media. this is for the udf
3283 file system. */
3284int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
3285{
3286 struct cdrom_tocentry toc;
3287 disc_information di;
3288 track_information ti;
3289 __u32 last_track;
3290 int ret = -1, ti_size;
3291
3292 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3293 goto use_toc;
3294
3295 ret = cdrom_get_disc_info(cdi, &di);
3296 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
3297 + sizeof(di.last_track_lsb)))
3298 goto use_toc;
3299
3300 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3301 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3302 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3303 if (ti_size < (int)offsetof(typeof(ti), track_start))
3304 goto use_toc;
3305
3306 /* if this track is blank, try the previous. */
3307 if (ti.blank) {
3308 if (last_track==1)
3309 goto use_toc;
3310 last_track--;
3311 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3312 }
3313
3314 if (ti_size < (int)(offsetof(typeof(ti), track_size)
3315 + sizeof(ti.track_size)))
3316 goto use_toc;
3317
3318 /* if last recorded field is valid, return it. */
3319 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
3320 + sizeof(ti.last_rec_address))) {
3321 *last_written = be32_to_cpu(ti.last_rec_address);
3322 } else {
3323 /* make it up instead */
3324 *last_written = be32_to_cpu(ti.track_start) +
3325 be32_to_cpu(ti.track_size);
3326 if (ti.free_blocks)
3327 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
3328 }
3329 return 0;
3330
3331 /* this is where we end up if the drive either can't do a
3332 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
3333 it doesn't give enough information or fails. then we return
3334 the toc contents. */
3335use_toc:
3336 toc.cdte_format = CDROM_MSF;
3337 toc.cdte_track = CDROM_LEADOUT;
3338 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
3339 return ret;
3340 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
3341 *last_written = toc.cdte_addr.lba;
3342 return 0;
3343}
3344
3345/* return the next writable block. also for udf file system. */
3346static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable)
3347{
3348 disc_information di;
3349 track_information ti;
3350 __u16 last_track;
3351 int ret, ti_size;
3352
3353 if (!CDROM_CAN(CDC_GENERIC_PACKET))
3354 goto use_last_written;
3355
3356 ret = cdrom_get_disc_info(cdi, &di);
3357 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
3358 + sizeof(di.last_track_lsb))
3359 goto use_last_written;
3360
3361 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
3362 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
3363 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3364 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
3365 goto use_last_written;
3366
3367 /* if this track is blank, try the previous. */
3368 if (ti.blank) {
3369 if (last_track == 1)
3370 goto use_last_written;
3371 last_track--;
3372 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
3373 if (ti_size < 0)
3374 goto use_last_written;
3375 }
3376
3377 /* if next recordable address field is valid, use it. */
3378 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
3379 + sizeof(ti.next_writable)) {
3380 *next_writable = be32_to_cpu(ti.next_writable);
3381 return 0;
3382 }
3383
3384use_last_written:
3385 if ((ret = cdrom_get_last_written(cdi, next_writable))) {
3386 *next_writable = 0;
3387 return ret;
3388 } else {
3389 *next_writable += 7;
3390 return 0;
3391 }
3392}
3393
3394EXPORT_SYMBOL(cdrom_get_last_written);
3395EXPORT_SYMBOL(register_cdrom);
3396EXPORT_SYMBOL(unregister_cdrom);
3397EXPORT_SYMBOL(cdrom_open);
3398EXPORT_SYMBOL(cdrom_release);
3399EXPORT_SYMBOL(cdrom_ioctl);
3400EXPORT_SYMBOL(cdrom_media_changed);
3401EXPORT_SYMBOL(cdrom_number_of_slots);
3402EXPORT_SYMBOL(cdrom_mode_select);
3403EXPORT_SYMBOL(cdrom_mode_sense);
3404EXPORT_SYMBOL(init_cdrom_command);
3405EXPORT_SYMBOL(cdrom_get_media_event);
3406
3407#ifdef CONFIG_SYSCTL
3408
3409#define CDROM_STR_SIZE 1000
3410
3411static struct cdrom_sysctl_settings {
3412 char info[CDROM_STR_SIZE]; /* general info */
3413 int autoclose; /* close tray upon mount, etc */
3414 int autoeject; /* eject on umount */
3415 int debug; /* turn on debugging messages */
3416 int lock; /* lock the door on device open */
3417 int check; /* check media type */
3418} cdrom_sysctl_settings;
3419
554988d6
DY		 3420enum cdrom_print_option {
3421 CTL_NAME,
3422 CTL_SPEED,
3423 CTL_SLOTS,
3424 CTL_CAPABILITY
3425};
3426
3427static int cdrom_print_info(const char *header, int val, char *info,
3428 int *pos, enum cdrom_print_option option)
3429{
3430 const int max_size = sizeof(cdrom_sysctl_settings.info);
3431 struct cdrom_device_info *cdi;
3432 int ret;
3433
3434 ret = scnprintf(info + *pos, max_size - *pos, header);
3435 if (!ret)
3436 return 1;
3437
3438 *pos += ret;
3439
7fd097d4 3440 list_for_each_entry(cdi, &cdrom_list, list) {
554988d6
DY		 3441 switch (option) {
3442 case CTL_NAME:
3443 ret = scnprintf(info + *pos, max_size - *pos,
3444 "\t%s", cdi->name);
3445 break;
3446 case CTL_SPEED:
3447 ret = scnprintf(info + *pos, max_size - *pos,
3448 "\t%d", cdi->speed);
3449 break;
3450 case CTL_SLOTS:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%d", cdi->capacity);
3453 break;
3454 case CTL_CAPABILITY:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", CDROM_CAN(val) != 0);
3457 break;
3458 default:
e597cd09 3459 pr_info("invalid option%d\n", option);
554988d6
DY		 3460 return 1;
3461 }
3462 if (!ret)
3463 return 1;
3464 *pos += ret;
3465 }
3466
3467 return 0;
3468}
3469
8d65af78 3470static int cdrom_sysctl_info(ctl_table *ctl, int write,
1da177e4
LT		 3471 void __user *buffer, size_t *lenp, loff_t *ppos)
3472{
554988d6 3473 int pos;
1da177e4 3474 char *info = cdrom_sysctl_settings.info;
554988d6 3475 const int max_size = sizeof(cdrom_sysctl_settings.info);
1da177e4
LT		 3476
3477 if (!*lenp || (*ppos && !write)) {
3478 *lenp = 0;
3479 return 0;
3480 }
3481
554988d6
DY		 3482 mutex_lock(&cdrom_mutex);
3483
1da177e4
LT		 3484 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3485
554988d6
DY		 3486 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3487 goto done;
3488 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3489 goto done;
3490 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3491 goto done;
3492 if (cdrom_print_info("\nCan close tray:\t",
3493 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3494 goto done;
3495 if (cdrom_print_info("\nCan open tray:\t",
3496 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3497 goto done;
3498 if (cdrom_print_info("\nCan lock tray:\t",
3499 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3500 goto done;
3501 if (cdrom_print_info("\nCan change speed:",
3502 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3503 goto done;
3504 if (cdrom_print_info("\nCan select disk:",
3505 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3506 goto done;
3507 if (cdrom_print_info("\nCan read multisession:",
3508 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3509 goto done;
3510 if (cdrom_print_info("\nCan read MCN:\t",
3511 CDC_MCN, info, &pos, CTL_CAPABILITY))
3512 goto done;
3513 if (cdrom_print_info("\nReports media changed:",
3514 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3515 goto done;
3516 if (cdrom_print_info("\nCan play audio:\t",
3517 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3518 goto done;
3519 if (cdrom_print_info("\nCan write CD-R:\t",
3520 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3521 goto done;
3522 if (cdrom_print_info("\nCan write CD-RW:",
3523 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3524 goto done;
3525 if (cdrom_print_info("\nCan read DVD:\t",
3526 CDC_DVD, info, &pos, CTL_CAPABILITY))
3527 goto done;
3528 if (cdrom_print_info("\nCan write DVD-R:",
3529 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3530 goto done;
3531 if (cdrom_print_info("\nCan write DVD-RAM:",
3532 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3533 goto done;
3534 if (cdrom_print_info("\nCan read MRW:\t",
3535 CDC_MRW, info, &pos, CTL_CAPABILITY))
3536 goto done;
3537 if (cdrom_print_info("\nCan write MRW:\t",
3538 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3539 goto done;
3540 if (cdrom_print_info("\nCan write RAM:\t",
3541 CDC_RAM, info, &pos, CTL_CAPABILITY))
3542 goto done;
3543 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3544 goto done;
3545doit:
3546 mutex_unlock(&cdrom_mutex);
8d65af78 3547 return proc_dostring(ctl, write, buffer, lenp, ppos);
554988d6 3548done:
e597cd09 3549 pr_info("info buffer too small\n");
554988d6 3550 goto doit;
1da177e4
LT		 3551}
3552
3553/* Unfortunately, per device settings are not implemented through
3554 procfs/sysctl yet. When they are, this will naturally disappear. For now
3555 just update all drives. Later this will become the template on which
3556 new registered drives will be based. */
3557static void cdrom_update_settings(void)
3558{
3559 struct cdrom_device_info *cdi;
3560
032d8d90 3561 mutex_lock(&cdrom_mutex);
7fd097d4 3562 list_for_each_entry(cdi, &cdrom_list, list) {
1da177e4
LT		 3563 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3564 cdi->options |= CDO_AUTO_CLOSE;
3565 else if (!autoclose)
3566 cdi->options &= ~CDO_AUTO_CLOSE;
3567 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3568 cdi->options |= CDO_AUTO_EJECT;
3569 else if (!autoeject)
3570 cdi->options &= ~CDO_AUTO_EJECT;
3571 if (lockdoor && CDROM_CAN(CDC_LOCK))
3572 cdi->options |= CDO_LOCK;
3573 else if (!lockdoor)
3574 cdi->options &= ~CDO_LOCK;
3575 if (check_media_type)
3576 cdi->options |= CDO_CHECK_TYPE;
3577 else
3578 cdi->options &= ~CDO_CHECK_TYPE;
3579 }
032d8d90 3580 mutex_unlock(&cdrom_mutex);
1da177e4
LT		 3581}
3582
8d65af78 3583static int cdrom_sysctl_handler(ctl_table *ctl, int write,
1da177e4
LT		 3584 void __user *buffer, size_t *lenp, loff_t *ppos)
3585{
1da177e4
LT		 3586 int ret;
3587
8d65af78 3588 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
1da177e4 3589
06489b4e 3590 if (write) {
1da177e4
LT		 3591
3592 /* we only care for 1 or 0. */
06489b4e
EB		 3593 autoclose = !!cdrom_sysctl_settings.autoclose;
3594 autoeject = !!cdrom_sysctl_settings.autoeject;
3595 debug = !!cdrom_sysctl_settings.debug;
3596 lockdoor = !!cdrom_sysctl_settings.lock;
3597 check_media_type = !!cdrom_sysctl_settings.check;
1da177e4 3598
1da177e4
LT		 3599 /* update the option flags according to the changes. we
3600 don't have per device options through sysctl yet,
3601 but we will have and then this will disappear. */
3602 cdrom_update_settings();
3603 }
3604
3605 return ret;
3606}
3607
3608/* Place files in /proc/sys/dev/cdrom */
3609static ctl_table cdrom_table[] = {
3610 {
1da177e4
LT		 3611 .procname = "info",
3612 .data = &cdrom_sysctl_settings.info,
3613 .maxlen = CDROM_STR_SIZE,
3614 .mode = 0444,
6d456111 3615 .proc_handler = cdrom_sysctl_info,
1da177e4
LT		 3616 },
3617 {
1da177e4
LT		 3618 .procname = "autoclose",
3619 .data = &cdrom_sysctl_settings.autoclose,
3620 .maxlen = sizeof(int),
3621 .mode = 0644,
6d456111 3622 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3623 },
3624 {
1da177e4
LT		 3625 .procname = "autoeject",
3626 .data = &cdrom_sysctl_settings.autoeject,
3627 .maxlen = sizeof(int),
3628 .mode = 0644,
6d456111 3629 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3630 },
3631 {
1da177e4
LT		 3632 .procname = "debug",
3633 .data = &cdrom_sysctl_settings.debug,
3634 .maxlen = sizeof(int),
3635 .mode = 0644,
6d456111 3636 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3637 },
3638 {
1da177e4
LT		 3639 .procname = "lock",
3640 .data = &cdrom_sysctl_settings.lock,
3641 .maxlen = sizeof(int),
3642 .mode = 0644,
6d456111 3643 .proc_handler = cdrom_sysctl_handler,
1da177e4
LT		 3644 },
3645 {
1da177e4
LT		 3646 .procname = "check_media",
3647 .data = &cdrom_sysctl_settings.check,
3648 .maxlen = sizeof(int),
3649 .mode = 0644,
6d456111 3650 .proc_handler = cdrom_sysctl_handler
1da177e4 3651 },
894d2491 3652 { }
1da177e4
LT		 3653};
3654
3655static ctl_table cdrom_cdrom_table[] = {
3656 {
1da177e4
LT		 3657 .procname = "cdrom",
3658 .maxlen = 0,
3659 .mode = 0555,
3660 .child = cdrom_table,
3661 },
894d2491 3662 { }
1da177e4
LT		 3663};
3664
3665/* Make sure that /proc/sys/dev is there */
3666static ctl_table cdrom_root_table[] = {
3667 {
1da177e4
LT		 3668 .procname = "dev",
3669 .maxlen = 0,
3670 .mode = 0555,
3671 .child = cdrom_cdrom_table,
3672 },
894d2491 3673 { }
1da177e4
LT		 3674};
3675static struct ctl_table_header *cdrom_sysctl_header;
3676
3677static void cdrom_sysctl_register(void)
3678{
3679 static int initialized;
3680
3681 if (initialized == 1)
3682 return;
3683
0b4d4147 3684 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
1da177e4
LT		 3685
3686 /* set the defaults */
3687 cdrom_sysctl_settings.autoclose = autoclose;
3688 cdrom_sysctl_settings.autoeject = autoeject;
3689 cdrom_sysctl_settings.debug = debug;
3690 cdrom_sysctl_settings.lock = lockdoor;
3691 cdrom_sysctl_settings.check = check_media_type;
3692
3693 initialized = 1;
3694}
3695
3696static void cdrom_sysctl_unregister(void)
3697{
3698 if (cdrom_sysctl_header)
3699 unregister_sysctl_table(cdrom_sysctl_header);
3700}
3701
17672cf0
AM		 3702#else /* CONFIG_SYSCTL */
3703
3704static void cdrom_sysctl_register(void)
3705{
3706}
3707
3708static void cdrom_sysctl_unregister(void)
3709{
3710}
3711
1da177e4
LT		 3712#endif /* CONFIG_SYSCTL */
3713
3714static int __init cdrom_init(void)
3715{
1da177e4 3716 cdrom_sysctl_register();
17672cf0 3717
1da177e4
LT		 3718 return 0;
3719}
3720
3721static void __exit cdrom_exit(void)
3722{
e597cd09 3723 pr_info("Uniform CD-ROM driver unloaded\n");
1da177e4 3724 cdrom_sysctl_unregister();
1da177e4
LT		 3725}
3726
3727module_init(cdrom_init);
3728module_exit(cdrom_exit);
3729MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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