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Uwe Zeisbergerf30c2262006-10-03 23:01:26 +02001/* linux/drivers/cdrom/cdrom.c
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 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>
Lucas De Marchi25985ed2011-03-30 22:57:33 -030033 -- New maintainer! As David A. van Leeuwen has been too busy to actively
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 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
Joe Perchese597cd02010-07-01 08:24:32 +0200245#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247#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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268#include <linux/module.h>
269#include <linux/fs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270#include <linux/major.h>
271#include <linux/types.h>
272#include <linux/errno.h>
273#include <linux/kernel.h>
274#include <linux/mm.h>
275#include <linux/slab.h>
276#include <linux/cdrom.h>
277#include <linux/sysctl.h>
278#include <linux/proc_fs.h>
279#include <linux/blkpg.h>
280#include <linux/init.h>
281#include <linux/fcntl.h>
282#include <linux/blkdev.h>
283#include <linux/times.h>
284
285#include <asm/uaccess.h>
286
287/* used to tell the module to turn on full debugging messages */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030288static bool debug;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289/* default compatibility mode */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030290static bool autoclose=1;
291static bool autoeject;
292static bool lockdoor = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/* will we ever get to use this... sigh. */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030294static bool check_media_type;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295/* automatically restart mrw format */
Rusty Russell90ab5ee2012-01-13 09:32:20 +1030296static bool mrw_format_restart = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297module_param(debug, bool, 0);
298module_param(autoclose, bool, 0);
299module_param(autoeject, bool, 0);
300module_param(lockdoor, bool, 0);
301module_param(check_media_type, bool, 0);
302module_param(mrw_format_restart, bool, 0);
303
Dave Young554988d2007-06-19 09:14:26 +0200304static DEFINE_MUTEX(cdrom_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
306static const char *mrw_format_status[] = {
307 "not mrw",
308 "bgformat inactive",
309 "bgformat active",
310 "mrw complete",
311};
312
313static const char *mrw_address_space[] = { "DMA", "GAA" };
314
Joe Perches5944b2c2014-05-04 17:05:02 -0700315#if (ERRLOGMASK != CD_NOTHING)
316#define cd_dbg(type, fmt, ...) \
Joe Perchese597cd02010-07-01 08:24:32 +0200317do { \
318 if ((ERRLOGMASK & type) || debug == 1) \
Joe Perches5944b2c2014-05-04 17:05:02 -0700319 pr_debug(fmt, ##__VA_ARGS__); \
Joe Perchese597cd02010-07-01 08:24:32 +0200320} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321#else
Joe Perches5944b2c2014-05-04 17:05:02 -0700322#define cd_dbg(type, fmt, ...) \
Joe Perchese597cd02010-07-01 08:24:32 +0200323do { \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
Joe Perches5944b2c2014-05-04 17:05:02 -0700325 pr_debug(fmt, ##__VA_ARGS__); \
Joe Perchese597cd02010-07-01 08:24:32 +0200326} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327#endif
328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
330 a lot of places. This macro makes the code more clear. */
331#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
332
Jens Axboe2e11c202007-01-03 08:10:35 +0100333/*
334 * Another popular OS uses 7 seconds as the hard timeout for default
335 * commands, so it is a good choice for us as well.
336 */
337#define CDROM_DEF_TIMEOUT (7 * HZ)
338
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339/* Not-exported routines. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341static void cdrom_sysctl_register(void);
Akinobu Mita17672cf2008-03-26 12:08:59 +0100342
Akinobu Mita7fd097d2008-03-26 12:09:02 +0100343static LIST_HEAD(cdrom_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
345static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
347{
348 if (cgc->sense) {
349 cgc->sense->sense_key = 0x05;
350 cgc->sense->asc = 0x20;
351 cgc->sense->ascq = 0x00;
352 }
353
354 cgc->stat = -EIO;
355 return -EIO;
356}
357
Joe Perches40569c62014-05-04 17:05:12 -0700358static int cdrom_flush_cache(struct cdrom_device_info *cdi)
359{
360 struct packet_command cgc;
361
362 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
363 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
364
365 cgc.timeout = 5 * 60 * HZ;
366
367 return cdi->ops->generic_packet(cdi, &cgc);
368}
369
Joe Perchesbd6f0bb2014-05-04 17:05:13 -0700370/* requires CD R/RW */
371static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
372 disc_information *di)
373{
374 struct cdrom_device_ops *cdo = cdi->ops;
375 struct packet_command cgc;
376 int ret, buflen;
377
378 /* set up command and get the disc info */
379 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
380 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
381 cgc.cmd[8] = cgc.buflen = 2;
382 cgc.quiet = 1;
383
384 ret = cdo->generic_packet(cdi, &cgc);
385 if (ret)
386 return ret;
387
388 /* not all drives have the same disc_info length, so requeue
389 * packet with the length the drive tells us it can supply
390 */
391 buflen = be16_to_cpu(di->disc_information_length) +
392 sizeof(di->disc_information_length);
393
394 if (buflen > sizeof(disc_information))
395 buflen = sizeof(disc_information);
396
397 cgc.cmd[8] = cgc.buflen = buflen;
398 ret = cdo->generic_packet(cdi, &cgc);
399 if (ret)
400 return ret;
401
402 /* return actual fill size */
403 return buflen;
404}
405
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406/* This macro makes sure we don't have to check on cdrom_device_ops
407 * existence in the run-time routines below. Change_capability is a
408 * hack to have the capability flags defined const, while we can still
409 * change it here without gcc complaining at every line.
410 */
Joe Perches40569c62014-05-04 17:05:12 -0700411#define ENSURE(call, bits) \
412do { \
413 if (cdo->call == NULL) \
414 *change_capability &= ~(bits); \
415} while (0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417/*
418 * the first prototypes used 0x2c as the page code for the mrw mode page,
419 * subsequently this was changed to 0x03. probe the one used by this drive
420 */
421static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
422{
423 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200424 char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200426 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428 cgc.timeout = HZ;
429 cgc.quiet = 1;
430
431 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
432 cdi->mrw_mode_page = MRW_MODE_PC;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200433 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
435 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200436 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200438
439 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440}
441
442static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
443{
444 struct packet_command cgc;
445 struct mrw_feature_desc *mfd;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200446 unsigned char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 int ret;
448
449 *write = 0;
450
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200451 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
453 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
454 cgc.cmd[3] = CDF_MRW;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200455 cgc.cmd[8] = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 cgc.quiet = 1;
457
458 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200459 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
461 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200462 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
463 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 *write = mfd->write;
465
466 if ((ret = cdrom_mrw_probe_pc(cdi))) {
467 *write = 0;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200468 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200470
471 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472}
473
474static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
475{
476 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200477 unsigned char buffer[12];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 int ret;
479
Joe Perchese597cd02010-07-01 08:24:32 +0200480 pr_info("%sstarting format\n", cont ? "Re" : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481
482 /*
483 * FmtData bit set (bit 4), format type is 1
484 */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200485 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
487 cgc.cmd[1] = (1 << 4) | 1;
488
489 cgc.timeout = 5 * 60 * HZ;
490
491 /*
492 * 4 byte format list header, 8 byte format list descriptor
493 */
494 buffer[1] = 1 << 1;
495 buffer[3] = 8;
496
497 /*
498 * nr_blocks field
499 */
500 buffer[4] = 0xff;
501 buffer[5] = 0xff;
502 buffer[6] = 0xff;
503 buffer[7] = 0xff;
504
505 buffer[8] = 0x24 << 2;
506 buffer[11] = cont;
507
508 ret = cdi->ops->generic_packet(cdi, &cgc);
509 if (ret)
Joe Perchese597cd02010-07-01 08:24:32 +0200510 pr_info("bgformat failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
512 return ret;
513}
514
515static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
516{
517 struct packet_command cgc;
518
519 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
520 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
521
522 /*
523 * Session = 1, Track = 0
524 */
525 cgc.cmd[1] = !!immed;
526 cgc.cmd[2] = 1 << 1;
527
528 cgc.timeout = 5 * 60 * HZ;
529
530 return cdi->ops->generic_packet(cdi, &cgc);
531}
532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
534{
535 disc_information di;
536 int ret;
537
538 ret = cdrom_get_disc_info(cdi, &di);
539 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
540 return 1;
541
542 ret = 0;
543 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
Joe Perchese597cd02010-07-01 08:24:32 +0200544 pr_info("issuing MRW background format suspend\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 ret = cdrom_mrw_bgformat_susp(cdi, 0);
546 }
547
Jens Axboe7da21a02005-05-01 12:12:52 -0700548 if (!ret && cdi->media_written)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 ret = cdrom_flush_cache(cdi);
550
551 return ret;
552}
553
554static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
555{
556 struct packet_command cgc;
557 struct mode_page_header *mph;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200558 char buffer[16];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 int ret, offset, size;
560
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200561 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200563 cgc.buffer = buffer;
564 cgc.buflen = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Joe Perches40569c62014-05-04 17:05:12 -0700566 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
567 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200568 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
Joe Perches40569c62014-05-04 17:05:12 -0700570 mph = (struct mode_page_header *)buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 offset = be16_to_cpu(mph->desc_length);
572 size = be16_to_cpu(mph->mode_data_length) + 2;
573
574 buffer[offset + 3] = space;
575 cgc.buflen = size;
576
Joe Perches40569c62014-05-04 17:05:12 -0700577 ret = cdrom_mode_select(cdi, &cgc);
578 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200579 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580
Joe Perchese597cd02010-07-01 08:24:32 +0200581 pr_info("%s: mrw address space %s selected\n",
582 cdi->name, mrw_address_space[space]);
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200583 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584}
585
Joe Perches40569c62014-05-04 17:05:12 -0700586int register_cdrom(struct cdrom_device_info *cdi)
587{
588 static char banner_printed;
589 struct cdrom_device_ops *cdo = cdi->ops;
590 int *change_capability = (int *)&cdo->capability; /* hack */
591
592 cd_dbg(CD_OPEN, "entering register_cdrom\n");
593
594 if (cdo->open == NULL || cdo->release == NULL)
595 return -EINVAL;
596 if (!banner_printed) {
597 pr_info("Uniform CD-ROM driver " REVISION "\n");
598 banner_printed = 1;
599 cdrom_sysctl_register();
600 }
601
602 ENSURE(drive_status, CDC_DRIVE_STATUS);
603 if (cdo->check_events == NULL && cdo->media_changed == NULL)
604 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
605 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
606 ENSURE(lock_door, CDC_LOCK);
607 ENSURE(select_speed, CDC_SELECT_SPEED);
608 ENSURE(get_last_session, CDC_MULTI_SESSION);
609 ENSURE(get_mcn, CDC_MCN);
610 ENSURE(reset, CDC_RESET);
611 ENSURE(generic_packet, CDC_GENERIC_PACKET);
612 cdi->mc_flags = 0;
613 cdo->n_minors = 0;
614 cdi->options = CDO_USE_FFLAGS;
615
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
620 if (lockdoor == 1)
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
624
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
627
628 if (cdi->disk)
629 cdi->cdda_method = CDDA_BPC_FULL;
630 else
631 cdi->cdda_method = CDDA_OLD;
632
633 if (!cdo->generic_packet)
634 cdo->generic_packet = cdrom_dummy_generic_packet;
635
636 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
637 mutex_lock(&cdrom_mutex);
638 list_add(&cdi->list, &cdrom_list);
639 mutex_unlock(&cdrom_mutex);
640 return 0;
641}
642#undef ENSURE
643
644void unregister_cdrom(struct cdrom_device_info *cdi)
645{
646 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
647
648 mutex_lock(&cdrom_mutex);
649 list_del(&cdi->list);
650 mutex_unlock(&cdrom_mutex);
651
652 if (cdi->exit)
653 cdi->exit(cdi);
654
655 cdi->ops->n_minors--;
656 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657}
658
659int cdrom_get_media_event(struct cdrom_device_info *cdi,
660 struct media_event_desc *med)
661{
662 struct packet_command cgc;
663 unsigned char buffer[8];
664 struct event_header *eh = (struct event_header *)buffer;
665
666 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
667 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
668 cgc.cmd[1] = 1; /* IMMED */
669 cgc.cmd[4] = 1 << 4; /* media event */
670 cgc.cmd[8] = sizeof(buffer);
671 cgc.quiet = 1;
672
673 if (cdi->ops->generic_packet(cdi, &cgc))
674 return 1;
675
676 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 return 1;
678
679 if (eh->nea || eh->notification_class != 0x4)
680 return 1;
681
682 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
683 return 0;
684}
685
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
687 struct rwrt_feature_desc *rfd)
688{
689 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200690 char buffer[24];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 int ret;
692
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200693 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694
695 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
696 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200697 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 cgc.quiet = 1;
699
700 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200701 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702
703 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200704 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705}
706
707static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
708{
709 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200710 char buffer[16];
Alexey Dobriyan56052d52005-12-01 17:10:40 -0500711 __be16 *feature_code;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 int ret;
713
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200714 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715
716 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
717 cgc.cmd[3] = CDF_HWDM;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200718 cgc.cmd[8] = sizeof(buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 cgc.quiet = 1;
720
721 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200722 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723
Alexey Dobriyan56052d52005-12-01 17:10:40 -0500724 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 if (be16_to_cpu(*feature_code) == CDF_HWDM)
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200726 return 0;
727
728 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729}
730
731
732static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
733{
734 struct rwrt_feature_desc rfd;
735 int ret;
736
737 *write = 0;
738
739 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 return ret;
741
742 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
743 *write = 1;
744
745 return 0;
746}
747
748static int cdrom_media_erasable(struct cdrom_device_info *cdi)
749{
750 disc_information di;
751 int ret;
752
753 ret = cdrom_get_disc_info(cdi, &di);
754 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
755 return -1;
756
757 return di.erasable;
758}
759
760/*
761 * FIXME: check RO bit
762 */
763static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
764{
765 int ret = cdrom_media_erasable(cdi);
766
767 /*
768 * allow writable open if media info read worked and media is
769 * erasable, _or_ if it fails since not all drives support it
770 */
771 if (!ret)
772 return 1;
773
774 return 0;
775}
776
777static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
778{
779 disc_information di;
780 int ret;
781
782 /*
783 * always reset to DMA lba space on open
784 */
785 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
Joe Perchese597cd02010-07-01 08:24:32 +0200786 pr_err("failed setting lba address space\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 return 1;
788 }
789
790 ret = cdrom_get_disc_info(cdi, &di);
791 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
792 return 1;
793
794 if (!di.erasable)
795 return 1;
796
797 /*
798 * mrw_status
799 * 0 - not MRW formatted
800 * 1 - MRW bgformat started, but not running or complete
801 * 2 - MRW bgformat in progress
802 * 3 - MRW formatting complete
803 */
804 ret = 0;
Joe Perchese597cd02010-07-01 08:24:32 +0200805 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (!di.mrw_status)
807 ret = 1;
808 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
809 mrw_format_restart)
810 ret = cdrom_mrw_bgformat(cdi, 1);
811
812 return ret;
813}
814
815static int mo_open_write(struct cdrom_device_info *cdi)
816{
817 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200818 char buffer[255];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819 int ret;
820
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200821 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 cgc.quiet = 1;
823
824 /*
825 * obtain write protect information as per
826 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 */
828
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
830 if (ret)
831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 if (ret) {
833 cgc.buflen = 255;
834 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 }
836
837 /* drive gave us no info, let the user go ahead */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200838 if (ret)
839 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200841 return buffer[3] & 0x80;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842}
843
844static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
845{
846 struct rwrt_feature_desc rfd;
847 int ret;
848
849 if ((ret = cdrom_has_defect_mgt(cdi)))
850 return ret;
851
852 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
853 return ret;
854 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 ret = !rfd.curr;
856
Joe Perches5944b2c2014-05-04 17:05:02 -0700857 cd_dbg(CD_OPEN, "can open for random write\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 return ret;
859}
860
861static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
862{
863 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200864 char buffer[32];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 int ret, mmc3_profile;
866
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200867 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868
869 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
870 cgc.cmd[1] = 0;
871 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
FUJITA Tomonorifce53842008-07-04 09:33:01 +0200872 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 cgc.quiet = 1;
874
875 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
876 mmc3_profile = 0xffff;
877 else
878 mmc3_profile = (buffer[6] << 8) | buffer[7];
879
880 cdi->mmc3_profile = mmc3_profile;
881}
882
883static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
884{
885 switch (cdi->mmc3_profile) {
886 case 0x12: /* DVD-RAM */
887 case 0x1A: /* DVD+RW */
Georgios Toptsidisf7e78682015-09-25 10:50:08 +0300888 case 0x43: /* BD-RE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 return 0;
890 default:
891 return 1;
892 }
893}
894
895/*
896 * returns 0 for ok to open write, non-0 to disallow
897 */
898static int cdrom_open_write(struct cdrom_device_info *cdi)
899{
900 int mrw, mrw_write, ram_write;
901 int ret = 1;
902
903 mrw = 0;
904 if (!cdrom_is_mrw(cdi, &mrw_write))
905 mrw = 1;
906
907 if (CDROM_CAN(CDC_MO_DRIVE))
908 ram_write = 1;
909 else
910 (void) cdrom_is_random_writable(cdi, &ram_write);
911
912 if (mrw)
913 cdi->mask &= ~CDC_MRW;
914 else
915 cdi->mask |= CDC_MRW;
916
917 if (mrw_write)
918 cdi->mask &= ~CDC_MRW_W;
919 else
920 cdi->mask |= CDC_MRW_W;
921
922 if (ram_write)
923 cdi->mask &= ~CDC_RAM;
924 else
925 cdi->mask |= CDC_RAM;
926
927 if (CDROM_CAN(CDC_MRW_W))
928 ret = cdrom_mrw_open_write(cdi);
929 else if (CDROM_CAN(CDC_DVD_RAM))
930 ret = cdrom_dvdram_open_write(cdi);
931 else if (CDROM_CAN(CDC_RAM) &&
932 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
933 ret = cdrom_ram_open_write(cdi);
934 else if (CDROM_CAN(CDC_MO_DRIVE))
935 ret = mo_open_write(cdi);
936 else if (!cdrom_is_dvd_rw(cdi))
937 ret = 0;
938
939 return ret;
940}
941
942static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
943{
944 struct packet_command cgc;
945
946 if (cdi->mmc3_profile != 0x1a) {
Joe Perches5944b2c2014-05-04 17:05:02 -0700947 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 return;
949 }
950
951 if (!cdi->media_written) {
Joe Perches5944b2c2014-05-04 17:05:02 -0700952 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953 return;
954 }
955
Joe Perchese597cd02010-07-01 08:24:32 +0200956 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957
958 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
959 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
960 cgc.timeout = 30*HZ;
961 cdi->ops->generic_packet(cdi, &cgc);
962
963 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
964 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
965 cgc.timeout = 3000*HZ;
966 cgc.quiet = 1;
967 cdi->ops->generic_packet(cdi, &cgc);
968
969 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
970 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
971 cgc.cmd[2] = 2; /* Close session */
972 cgc.quiet = 1;
973 cgc.timeout = 3000*HZ;
974 cdi->ops->generic_packet(cdi, &cgc);
975
976 cdi->media_written = 0;
977}
978
979static int cdrom_close_write(struct cdrom_device_info *cdi)
980{
981#if 0
982 return cdrom_flush_cache(cdi);
983#else
984 return 0;
985#endif
986}
987
Joe Perchesa8033932014-05-04 17:05:11 -0700988/* badly broken, I know. Is due for a fixup anytime. */
989static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
990{
991 struct cdrom_tochdr header;
992 struct cdrom_tocentry entry;
993 int ret, i;
994 tracks->data = 0;
995 tracks->audio = 0;
996 tracks->cdi = 0;
997 tracks->xa = 0;
998 tracks->error = 0;
999 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1000 /* Grab the TOC header so we can see how many tracks there are */
1001 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1002 if (ret) {
1003 if (ret == -ENOMEDIUM)
1004 tracks->error = CDS_NO_DISC;
1005 else
1006 tracks->error = CDS_NO_INFO;
1007 return;
1008 }
1009 /* check what type of tracks are on this disc */
1010 entry.cdte_format = CDROM_MSF;
1011 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1012 entry.cdte_track = i;
1013 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1014 tracks->error = CDS_NO_INFO;
1015 return;
1016 }
1017 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1018 if (entry.cdte_format == 0x10)
1019 tracks->cdi++;
1020 else if (entry.cdte_format == 0x20)
1021 tracks->xa++;
1022 else
1023 tracks->data++;
1024 } else {
1025 tracks->audio++;
1026 }
1027 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1028 i, entry.cdte_format, entry.cdte_ctrl);
1029 }
1030 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1031 header.cdth_trk1, tracks->audio, tracks->data,
1032 tracks->cdi, tracks->xa);
1033}
1034
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035static
Joe Perches82b91542014-05-04 17:05:05 -07001036int open_for_data(struct cdrom_device_info *cdi)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001037{
1038 int ret;
1039 struct cdrom_device_ops *cdo = cdi->ops;
1040 tracktype tracks;
Joe Perches5944b2c2014-05-04 17:05:02 -07001041 cd_dbg(CD_OPEN, "entering open_for_data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001042 /* Check if the driver can report drive status. If it can, we
1043 can do clever things. If it can't, well, we at least tried! */
1044 if (cdo->drive_status != NULL) {
1045 ret = cdo->drive_status(cdi, CDSL_CURRENT);
Joe Perches5944b2c2014-05-04 17:05:02 -07001046 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 if (ret == CDS_TRAY_OPEN) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001048 cd_dbg(CD_OPEN, "the tray is open...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049 /* can/may i close it? */
1050 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1051 cdi->options & CDO_AUTO_CLOSE) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001052 cd_dbg(CD_OPEN, "trying to close the tray\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 ret=cdo->tray_move(cdi,0);
1054 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001055 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 /* Ignore the error from the low
1057 level driver. We don't care why it
1058 couldn't close the tray. We only care
1059 that there is no disc in the drive,
1060 since that is the _REAL_ problem here.*/
1061 ret=-ENOMEDIUM;
1062 goto clean_up_and_return;
1063 }
1064 } else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001065 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 ret=-ENOMEDIUM;
1067 goto clean_up_and_return;
1068 }
1069 /* Ok, the door should be closed now.. Check again */
1070 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001072 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1073 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 ret=-ENOMEDIUM;
1075 goto clean_up_and_return;
1076 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001077 cd_dbg(CD_OPEN, "the tray is now closed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 }
1079 /* the door should be closed now, check for the disc */
1080 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1081 if (ret!=CDS_DISC_OK) {
1082 ret = -ENOMEDIUM;
1083 goto clean_up_and_return;
1084 }
1085 }
1086 cdrom_count_tracks(cdi, &tracks);
1087 if (tracks.error == CDS_NO_DISC) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001088 cd_dbg(CD_OPEN, "bummer. no disc.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 ret=-ENOMEDIUM;
1090 goto clean_up_and_return;
1091 }
1092 /* CD-Players which don't use O_NONBLOCK, workman
1093 * for example, need bit CDO_CHECK_TYPE cleared! */
1094 if (tracks.data==0) {
1095 if (cdi->options & CDO_CHECK_TYPE) {
1096 /* give people a warning shot, now that CDO_CHECK_TYPE
1097 is the default case! */
Joe Perches5944b2c2014-05-04 17:05:02 -07001098 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1099 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1100 (unsigned int)task_pid_nr(current));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 ret=-EMEDIUMTYPE;
1102 goto clean_up_and_return;
1103 }
1104 else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001105 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 }
1107 }
1108
Joe Perches5944b2c2014-05-04 17:05:02 -07001109 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110
1111 /* all seems well, we can open the device */
1112 ret = cdo->open(cdi, 0); /* open for data */
Joe Perches5944b2c2014-05-04 17:05:02 -07001113 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114 /* After all this careful checking, we shouldn't have problems
1115 opening the device, but we don't want the device locked if
1116 this somehow fails... */
1117 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001118 cd_dbg(CD_OPEN, "open device failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119 goto clean_up_and_return;
1120 }
1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1122 cdo->lock_door(cdi, 1);
Joe Perches5944b2c2014-05-04 17:05:02 -07001123 cd_dbg(CD_OPEN, "door locked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001125 cd_dbg(CD_OPEN, "device opened successfully\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 return ret;
1127
1128 /* Something failed. Try to unlock the drive, because some drivers
1129 (notably ide-cd) lock the drive after every command. This produced
1130 a nasty bug where after mount failed, the drive would remain locked!
1131 This ensures that the drive gets unlocked after a mount fails. This
1132 is a goto to avoid bloating the driver with redundant code. */
1133clean_up_and_return:
Joe Perches5944b2c2014-05-04 17:05:02 -07001134 cd_dbg(CD_OPEN, "open failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1136 cdo->lock_door(cdi, 0);
Joe Perches5944b2c2014-05-04 17:05:02 -07001137 cd_dbg(CD_OPEN, "door unlocked\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001138 }
1139 return ret;
1140}
1141
Joe Perches82b91542014-05-04 17:05:05 -07001142/* We use the open-option O_NONBLOCK to indicate that the
1143 * purpose of opening is only for subsequent ioctl() calls; no device
1144 * integrity checks are performed.
1145 *
1146 * We hope that all cd-player programs will adopt this convention. It
1147 * is in their own interest: device control becomes a lot easier
1148 * this way.
1149 */
1150int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1151 fmode_t mode)
1152{
1153 int ret;
1154
1155 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1156
1157 /* open is event synchronization point, check events first */
1158 check_disk_change(bdev);
1159
1160 /* if this was a O_NONBLOCK open and we should honor the flags,
1161 * do a quick open without drive/disc integrity checks. */
1162 cdi->use_count++;
1163 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1164 ret = cdi->ops->open(cdi, 1);
1165 } else {
1166 ret = open_for_data(cdi);
1167 if (ret)
1168 goto err;
1169 cdrom_mmc3_profile(cdi);
1170 if (mode & FMODE_WRITE) {
1171 ret = -EROFS;
1172 if (cdrom_open_write(cdi))
1173 goto err_release;
1174 if (!CDROM_CAN(CDC_RAM))
1175 goto err_release;
1176 ret = 0;
1177 cdi->media_written = 0;
1178 }
1179 }
1180
1181 if (ret)
1182 goto err;
1183
1184 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1185 cdi->name, cdi->use_count);
1186 return 0;
1187err_release:
1188 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1189 cdi->ops->lock_door(cdi, 0);
1190 cd_dbg(CD_OPEN, "door unlocked\n");
1191 }
1192 cdi->ops->release(cdi);
1193err:
1194 cdi->use_count--;
1195 return ret;
1196}
1197
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198/* This code is similar to that in open_for_data. The routine is called
1199 whenever an audio play operation is requested.
1200*/
Adrian Bunkecb80c62008-03-04 11:23:51 +01001201static int check_for_audio_disc(struct cdrom_device_info * cdi,
1202 struct cdrom_device_ops * cdo)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203{
1204 int ret;
1205 tracktype tracks;
Joe Perches5944b2c2014-05-04 17:05:02 -07001206 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207 if (!(cdi->options & CDO_CHECK_TYPE))
1208 return 0;
1209 if (cdo->drive_status != NULL) {
1210 ret = cdo->drive_status(cdi, CDSL_CURRENT);
Joe Perches5944b2c2014-05-04 17:05:02 -07001211 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212 if (ret == CDS_TRAY_OPEN) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001213 cd_dbg(CD_OPEN, "the tray is open...\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214 /* can/may i close it? */
1215 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1216 cdi->options & CDO_AUTO_CLOSE) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001217 cd_dbg(CD_OPEN, "trying to close the tray\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 ret=cdo->tray_move(cdi,0);
1219 if (ret) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001220 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001221 /* Ignore the error from the low
1222 level driver. We don't care why it
1223 couldn't close the tray. We only care
1224 that there is no disc in the drive,
1225 since that is the _REAL_ problem here.*/
1226 return -ENOMEDIUM;
1227 }
1228 } else {
Joe Perches5944b2c2014-05-04 17:05:02 -07001229 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 return -ENOMEDIUM;
1231 }
1232 /* Ok, the door should be closed now.. Check again */
1233 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1234 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001235 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001236 return -ENOMEDIUM;
1237 }
1238 if (ret!=CDS_DISC_OK) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001239 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 return -EIO;
1241 }
Joe Perches5944b2c2014-05-04 17:05:02 -07001242 cd_dbg(CD_OPEN, "the tray is now closed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001243 }
1244 }
1245 cdrom_count_tracks(cdi, &tracks);
1246 if (tracks.error)
1247 return(tracks.error);
1248
1249 if (tracks.audio==0)
1250 return -EMEDIUMTYPE;
1251
1252 return 0;
1253}
1254
Al Virobbc1cc92007-10-07 17:54:28 -04001255void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001256{
1257 struct cdrom_device_ops *cdo = cdi->ops;
1258 int opened_for_data;
1259
Joe Perches5944b2c2014-05-04 17:05:02 -07001260 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
1262 if (cdi->use_count > 0)
1263 cdi->use_count--;
Borislav Petkov35841f72008-02-06 01:38:08 -08001264
1265 if (cdi->use_count == 0) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001266 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1267 cdi->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 cdrom_dvd_rw_close_write(cdi);
Borislav Petkov35841f72008-02-06 01:38:08 -08001269
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01001270 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001271 cd_dbg(CD_CLOSE, "Unlocking door!\n");
Borislav Petkov35841f72008-02-06 01:38:08 -08001272 cdo->lock_door(cdi, 0);
1273 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274 }
Borislav Petkov35841f72008-02-06 01:38:08 -08001275
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
Al Virobbc1cc92007-10-07 17:54:28 -04001277 !(mode & FMODE_NDELAY);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
1279 /*
1280 * flush cache on last write release
1281 */
1282 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1283 cdrom_close_write(cdi);
1284
1285 cdo->release(cdi);
1286 if (cdi->use_count == 0) { /* last process that closes dev*/
1287 if (opened_for_data &&
1288 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1289 cdo->tray_move(cdi, 1);
1290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291}
1292
1293static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1294 struct cdrom_changer_info *buf)
1295{
1296 struct packet_command cgc;
1297 struct cdrom_device_ops *cdo = cdi->ops;
1298 int length;
1299
1300 /*
1301 * Sanyo changer isn't spec compliant (doesn't use regular change
1302 * LOAD_UNLOAD command, and it doesn't implement the mech status
1303 * command below
1304 */
1305 if (cdi->sanyo_slot) {
1306 buf->hdr.nslots = 3;
1307 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1308 for (length = 0; length < 3; length++) {
1309 buf->slots[length].disc_present = 1;
1310 buf->slots[length].change = 0;
1311 }
1312 return 0;
1313 }
1314
1315 length = sizeof(struct cdrom_mechstat_header) +
1316 cdi->capacity * sizeof(struct cdrom_slot);
1317
1318 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1319 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1320 cgc.cmd[8] = (length >> 8) & 0xff;
1321 cgc.cmd[9] = length & 0xff;
1322 return cdo->generic_packet(cdi, &cgc);
1323}
1324
1325static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1326{
1327 struct cdrom_changer_info *info;
1328 int ret;
1329
Joe Perches5944b2c2014-05-04 17:05:02 -07001330 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 if (cdi->sanyo_slot)
1332 return CDS_NO_INFO;
1333
1334 info = kmalloc(sizeof(*info), GFP_KERNEL);
1335 if (!info)
1336 return -ENOMEM;
1337
1338 if ((ret = cdrom_read_mech_status(cdi, info)))
1339 goto out_free;
1340
1341 if (info->slots[slot].disc_present)
1342 ret = CDS_DISC_OK;
1343 else
1344 ret = CDS_NO_DISC;
1345
1346out_free:
1347 kfree(info);
1348 return ret;
1349}
1350
1351/* Return the number of slots for an ATAPI/SCSI cdrom,
1352 * return 1 if not a changer.
1353 */
1354int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1355{
1356 int status;
1357 int nslots = 1;
1358 struct cdrom_changer_info *info;
1359
Joe Perches5944b2c2014-05-04 17:05:02 -07001360 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 /* cdrom_read_mech_status requires a valid value for capacity: */
1362 cdi->capacity = 0;
1363
1364 info = kmalloc(sizeof(*info), GFP_KERNEL);
1365 if (!info)
1366 return -ENOMEM;
1367
1368 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1369 nslots = info->hdr.nslots;
1370
1371 kfree(info);
1372 return nslots;
1373}
1374
1375
1376/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1377static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1378{
1379 struct packet_command cgc;
1380
Joe Perches5944b2c2014-05-04 17:05:02 -07001381 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001382 if (cdi->sanyo_slot && slot < 0)
1383 return 0;
1384
1385 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1386 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1387 cgc.cmd[4] = 2 + (slot >= 0);
1388 cgc.cmd[8] = slot;
1389 cgc.timeout = 60 * HZ;
1390
1391 /* The Sanyo 3 CD changer uses byte 7 of the
1392 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1393 using the GPCMD_LOAD_UNLOAD opcode. */
1394 if (cdi->sanyo_slot && -1 < slot) {
1395 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1396 cgc.cmd[7] = slot;
1397 cgc.cmd[4] = cgc.cmd[8] = 0;
1398 cdi->sanyo_slot = slot ? slot : 3;
1399 }
1400
1401 return cdi->ops->generic_packet(cdi, &cgc);
1402}
1403
1404static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1405{
1406 struct cdrom_changer_info *info;
1407 int curslot;
1408 int ret;
1409
Joe Perches5944b2c2014-05-04 17:05:02 -07001410 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411 if (!CDROM_CAN(CDC_SELECT_DISC))
1412 return -EDRIVE_CANT_DO_THIS;
1413
Tejun Heo2d921722010-12-08 20:57:38 +01001414 if (cdi->ops->check_events)
1415 cdi->ops->check_events(cdi, 0, slot);
1416 else
1417 cdi->ops->media_changed(cdi, slot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001418
1419 if (slot == CDSL_NONE) {
1420 /* set media changed bits, on both queues */
1421 cdi->mc_flags = 0x3;
1422 return cdrom_load_unload(cdi, -1);
1423 }
1424
1425 info = kmalloc(sizeof(*info), GFP_KERNEL);
1426 if (!info)
1427 return -ENOMEM;
1428
1429 if ((ret = cdrom_read_mech_status(cdi, info))) {
1430 kfree(info);
1431 return ret;
1432 }
1433
1434 curslot = info->hdr.curslot;
1435 kfree(info);
1436
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01001437 if (cdi->use_count > 1 || cdi->keeplocked) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001438 if (slot == CDSL_CURRENT) {
1439 return curslot;
1440 } else {
1441 return -EBUSY;
1442 }
1443 }
1444
1445 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1446 which is useful if it had been previously unloaded.
1447 Whether it can or not, it returns the current slot.
1448 Similarly, if slot happens to be the current one, we still
1449 try and load it. */
1450 if (slot == CDSL_CURRENT)
1451 slot = curslot;
1452
1453 /* set media changed bits on both queues */
1454 cdi->mc_flags = 0x3;
1455 if ((ret = cdrom_load_unload(cdi, slot)))
1456 return ret;
1457
1458 return slot;
1459}
1460
Tejun Heo2d921722010-12-08 20:57:38 +01001461/*
1462 * As cdrom implements an extra ioctl consumer for media changed
1463 * event, it needs to buffer ->check_events() output, such that event
1464 * is not lost for both the usual VFS and ioctl paths.
1465 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1466 * path.
1467 *
1468 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1469 * called in parallel and buffering fields are accessed without any
1470 * exclusion. The original media_changed code had the same problem.
1471 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1472 * and remove this cruft altogether. It doesn't have much usefulness
1473 * at this point.
1474 */
1475static void cdrom_update_events(struct cdrom_device_info *cdi,
1476 unsigned int clearing)
1477{
1478 unsigned int events;
1479
1480 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1481 cdi->vfs_events |= events;
1482 cdi->ioctl_events |= events;
1483}
1484
1485unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1486 unsigned int clearing)
1487{
1488 unsigned int events;
1489
1490 cdrom_update_events(cdi, clearing);
1491 events = cdi->vfs_events;
1492 cdi->vfs_events = 0;
1493 return events;
1494}
Jens Axboe30a7caa2010-12-16 17:58:50 +01001495EXPORT_SYMBOL(cdrom_check_events);
Tejun Heo2d921722010-12-08 20:57:38 +01001496
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497/* We want to make media_changed accessible to the user through an
1498 * ioctl. The main problem now is that we must double-buffer the
1499 * low-level implementation, to assure that the VFS and the user both
1500 * see a medium change once.
1501 */
1502
1503static
1504int media_changed(struct cdrom_device_info *cdi, int queue)
1505{
1506 unsigned int mask = (1 << (queue & 1));
1507 int ret = !!(cdi->mc_flags & mask);
Tejun Heo2d921722010-12-08 20:57:38 +01001508 bool changed;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001509
1510 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
Tejun Heo2d921722010-12-08 20:57:38 +01001511 return ret;
1512
Linus Torvalds1da177e2005-04-16 15:20:36 -07001513 /* changed since last call? */
Tejun Heo2d921722010-12-08 20:57:38 +01001514 if (cdi->ops->check_events) {
1515 BUG_ON(!queue); /* shouldn't be called from VFS path */
1516 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1517 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1518 cdi->ioctl_events = 0;
1519 } else
1520 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1521
1522 if (changed) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001523 cdi->mc_flags = 0x3; /* set bit on both queues */
1524 ret |= 1;
1525 cdi->media_written = 0;
1526 }
Tejun Heo2d921722010-12-08 20:57:38 +01001527
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 cdi->mc_flags &= ~mask; /* clear bit */
1529 return ret;
1530}
1531
1532int cdrom_media_changed(struct cdrom_device_info *cdi)
1533{
1534 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1535 * Returning "0" is always safe (media hasn't been changed). Do that
1536 * if the low-level cdrom driver dosn't support media changed. */
1537 if (cdi == NULL || cdi->ops->media_changed == NULL)
1538 return 0;
1539 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1540 return 0;
1541 return media_changed(cdi, 0);
1542}
1543
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544/* Requests to the low-level drivers will /always/ be done in the
1545 following format convention:
1546
1547 CDROM_LBA: all data-related requests.
1548 CDROM_MSF: all audio-related requests.
1549
1550 However, a low-level implementation is allowed to refuse this
1551 request, and return information in its own favorite format.
1552
1553 It doesn't make sense /at all/ to ask for a play_audio in LBA
1554 format, or ask for multi-session info in MSF format. However, for
1555 backward compatibility these format requests will be satisfied, but
1556 the requests to the low-level drivers will be sanitized in the more
1557 meaningful format indicated above.
1558 */
1559
1560static
1561void sanitize_format(union cdrom_addr *addr,
1562 u_char * curr, u_char requested)
1563{
1564 if (*curr == requested)
1565 return; /* nothing to be done! */
1566 if (requested == CDROM_LBA) {
1567 addr->lba = (int) addr->msf.frame +
1568 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1569 } else { /* CDROM_MSF */
1570 int lba = addr->lba;
1571 addr->msf.frame = lba % 75;
1572 lba /= 75;
1573 lba += 2;
1574 addr->msf.second = lba % 60;
1575 addr->msf.minute = lba / 60;
1576 }
1577 *curr = requested;
1578}
1579
1580void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1581 int type)
1582{
1583 memset(cgc, 0, sizeof(struct packet_command));
1584 if (buf)
1585 memset(buf, 0, len);
1586 cgc->buffer = (char *) buf;
1587 cgc->buflen = len;
1588 cgc->data_direction = type;
Jens Axboe2e11c202007-01-03 08:10:35 +01001589 cgc->timeout = CDROM_DEF_TIMEOUT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590}
1591
1592/* DVD handling */
1593
1594#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1595#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1596
1597static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1598{
1599 cgc->cmd[0] = GPCMD_REPORT_KEY;
1600 cgc->cmd[10] = type | (agid << 6);
1601 switch (type) {
1602 case 0: case 8: case 5: {
1603 cgc->buflen = 8;
1604 break;
1605 }
1606 case 1: {
1607 cgc->buflen = 16;
1608 break;
1609 }
1610 case 2: case 4: {
1611 cgc->buflen = 12;
1612 break;
1613 }
1614 }
1615 cgc->cmd[9] = cgc->buflen;
1616 cgc->data_direction = CGC_DATA_READ;
1617}
1618
1619static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1620{
1621 cgc->cmd[0] = GPCMD_SEND_KEY;
1622 cgc->cmd[10] = type | (agid << 6);
1623 switch (type) {
1624 case 1: {
1625 cgc->buflen = 16;
1626 break;
1627 }
1628 case 3: {
1629 cgc->buflen = 12;
1630 break;
1631 }
1632 case 6: {
1633 cgc->buflen = 8;
1634 break;
1635 }
1636 }
1637 cgc->cmd[9] = cgc->buflen;
1638 cgc->data_direction = CGC_DATA_WRITE;
1639}
1640
1641static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1642{
1643 int ret;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001644 u_char buf[20];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645 struct packet_command cgc;
1646 struct cdrom_device_ops *cdo = cdi->ops;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001647 rpc_state_t rpc_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001649 memset(buf, 0, sizeof(buf));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1651
1652 switch (ai->type) {
1653 /* LU data send */
1654 case DVD_LU_SEND_AGID:
Joe Perches5944b2c2014-05-04 17:05:02 -07001655 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001656 cgc.quiet = 1;
1657 setup_report_key(&cgc, ai->lsa.agid, 0);
1658
1659 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001660 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001661
1662 ai->lsa.agid = buf[7] >> 6;
1663 /* Returning data, let host change state */
1664 break;
1665
1666 case DVD_LU_SEND_KEY1:
Joe Perches5944b2c2014-05-04 17:05:02 -07001667 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 setup_report_key(&cgc, ai->lsk.agid, 2);
1669
1670 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001671 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672
1673 copy_key(ai->lsk.key, &buf[4]);
1674 /* Returning data, let host change state */
1675 break;
1676
1677 case DVD_LU_SEND_CHALLENGE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001678 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001679 setup_report_key(&cgc, ai->lsc.agid, 1);
1680
1681 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001682 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001683
1684 copy_chal(ai->lsc.chal, &buf[4]);
1685 /* Returning data, let host change state */
1686 break;
1687
1688 /* Post-auth key */
1689 case DVD_LU_SEND_TITLE_KEY:
Joe Perches5944b2c2014-05-04 17:05:02 -07001690 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001691 cgc.quiet = 1;
1692 setup_report_key(&cgc, ai->lstk.agid, 4);
1693 cgc.cmd[5] = ai->lstk.lba;
1694 cgc.cmd[4] = ai->lstk.lba >> 8;
1695 cgc.cmd[3] = ai->lstk.lba >> 16;
1696 cgc.cmd[2] = ai->lstk.lba >> 24;
1697
1698 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001699 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700
1701 ai->lstk.cpm = (buf[4] >> 7) & 1;
1702 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1703 ai->lstk.cgms = (buf[4] >> 4) & 3;
1704 copy_key(ai->lstk.title_key, &buf[5]);
1705 /* Returning data, let host change state */
1706 break;
1707
1708 case DVD_LU_SEND_ASF:
Joe Perches5944b2c2014-05-04 17:05:02 -07001709 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001710 setup_report_key(&cgc, ai->lsasf.agid, 5);
1711
1712 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001713 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001714
1715 ai->lsasf.asf = buf[7] & 1;
1716 break;
1717
1718 /* LU data receive (LU changes state) */
1719 case DVD_HOST_SEND_CHALLENGE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001720 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001721 setup_send_key(&cgc, ai->hsc.agid, 1);
1722 buf[1] = 0xe;
1723 copy_chal(&buf[4], ai->hsc.chal);
1724
1725 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001726 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001727
1728 ai->type = DVD_LU_SEND_KEY1;
1729 break;
1730
1731 case DVD_HOST_SEND_KEY2:
Joe Perches5944b2c2014-05-04 17:05:02 -07001732 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001733 setup_send_key(&cgc, ai->hsk.agid, 3);
1734 buf[1] = 0xa;
1735 copy_key(&buf[4], ai->hsk.key);
1736
1737 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1738 ai->type = DVD_AUTH_FAILURE;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001739 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001740 }
1741 ai->type = DVD_AUTH_ESTABLISHED;
1742 break;
1743
1744 /* Misc */
1745 case DVD_INVALIDATE_AGID:
1746 cgc.quiet = 1;
Joe Perches5944b2c2014-05-04 17:05:02 -07001747 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001748 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1749 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001750 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001751 break;
1752
1753 /* Get region settings */
1754 case DVD_LU_SEND_RPC_STATE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001755 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 setup_report_key(&cgc, 0, 8);
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001757 memset(&rpc_state, 0, sizeof(rpc_state_t));
1758 cgc.buffer = (char *) &rpc_state;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001759
1760 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001761 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001762
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001763 ai->lrpcs.type = rpc_state.type_code;
1764 ai->lrpcs.vra = rpc_state.vra;
1765 ai->lrpcs.ucca = rpc_state.ucca;
1766 ai->lrpcs.region_mask = rpc_state.region_mask;
1767 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001768 break;
1769
1770 /* Set region settings */
1771 case DVD_HOST_SEND_RPC_STATE:
Joe Perches5944b2c2014-05-04 17:05:02 -07001772 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001773 setup_send_key(&cgc, 0, 6);
1774 buf[1] = 6;
1775 buf[4] = ai->hrpcs.pdrc;
1776
1777 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001778 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779 break;
1780
1781 default:
Joe Perches5944b2c2014-05-04 17:05:02 -07001782 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001783 return -ENOTTY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001784 }
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001785
1786 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787}
1788
Marcin Slusarzd1941392008-11-16 19:06:37 +01001789static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1790 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791{
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001792 unsigned char buf[21], *base;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001793 struct dvd_layer *layer;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 struct cdrom_device_ops *cdo = cdi->ops;
1795 int ret, layer_num = s->physical.layer_num;
1796
1797 if (layer_num >= DVD_LAYERS)
1798 return -EINVAL;
1799
Marcin Slusarzd1941392008-11-16 19:06:37 +01001800 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1801 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1802 cgc->cmd[6] = layer_num;
1803 cgc->cmd[7] = s->type;
1804 cgc->cmd[9] = cgc->buflen & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805
1806 /*
1807 * refrain from reporting errors on non-existing layers (mainly)
1808 */
Marcin Slusarzd1941392008-11-16 19:06:37 +01001809 cgc->quiet = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001810
Marcin Slusarzd1941392008-11-16 19:06:37 +01001811 ret = cdo->generic_packet(cdi, cgc);
1812 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001813 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001814
1815 base = &buf[4];
1816 layer = &s->physical.layer[layer_num];
1817
1818 /*
1819 * place the data... really ugly, but at least we won't have to
1820 * worry about endianess in userspace.
1821 */
1822 memset(layer, 0, sizeof(*layer));
1823 layer->book_version = base[0] & 0xf;
1824 layer->book_type = base[0] >> 4;
1825 layer->min_rate = base[1] & 0xf;
1826 layer->disc_size = base[1] >> 4;
1827 layer->layer_type = base[2] & 0xf;
1828 layer->track_path = (base[2] >> 4) & 1;
1829 layer->nlayers = (base[2] >> 5) & 3;
1830 layer->track_density = base[3] & 0xf;
1831 layer->linear_density = base[3] >> 4;
1832 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1833 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1834 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1835 layer->bca = base[16] >> 7;
1836
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001837 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838}
1839
Marcin Slusarzd1941392008-11-16 19:06:37 +01001840static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1841 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842{
1843 int ret;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001844 u_char buf[8];
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845 struct cdrom_device_ops *cdo = cdi->ops;
1846
Marcin Slusarzd1941392008-11-16 19:06:37 +01001847 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1848 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1849 cgc->cmd[6] = s->copyright.layer_num;
1850 cgc->cmd[7] = s->type;
1851 cgc->cmd[8] = cgc->buflen >> 8;
1852 cgc->cmd[9] = cgc->buflen & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001853
Marcin Slusarzd1941392008-11-16 19:06:37 +01001854 ret = cdo->generic_packet(cdi, cgc);
1855 if (ret)
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001856 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001857
1858 s->copyright.cpst = buf[4];
1859 s->copyright.rmi = buf[5];
1860
FUJITA Tomonorifce53842008-07-04 09:33:01 +02001861 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001862}
1863
Marcin Slusarzd1941392008-11-16 19:06:37 +01001864static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1865 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001866{
1867 int ret, size;
1868 u_char *buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869 struct cdrom_device_ops *cdo = cdi->ops;
1870
1871 size = sizeof(s->disckey.value) + 4;
1872
Marcin Slusarzd1941392008-11-16 19:06:37 +01001873 buf = kmalloc(size, GFP_KERNEL);
1874 if (!buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001875 return -ENOMEM;
1876
Marcin Slusarzd1941392008-11-16 19:06:37 +01001877 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1878 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1879 cgc->cmd[7] = s->type;
1880 cgc->cmd[8] = size >> 8;
1881 cgc->cmd[9] = size & 0xff;
1882 cgc->cmd[10] = s->disckey.agid << 6;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001883
Marcin Slusarzd1941392008-11-16 19:06:37 +01001884 ret = cdo->generic_packet(cdi, cgc);
1885 if (!ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001886 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1887
1888 kfree(buf);
1889 return ret;
1890}
1891
Marcin Slusarzd1941392008-11-16 19:06:37 +01001892static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1893 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001894{
Marcin Slusarzd1941392008-11-16 19:06:37 +01001895 int ret, size = 4 + 188;
1896 u_char *buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001897 struct cdrom_device_ops *cdo = cdi->ops;
1898
Marcin Slusarzd1941392008-11-16 19:06:37 +01001899 buf = kmalloc(size, GFP_KERNEL);
1900 if (!buf)
1901 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
Marcin Slusarzd1941392008-11-16 19:06:37 +01001903 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1904 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1905 cgc->cmd[7] = s->type;
1906 cgc->cmd[9] = cgc->buflen & 0xff;
1907
1908 ret = cdo->generic_packet(cdi, cgc);
1909 if (ret)
1910 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001911
1912 s->bca.len = buf[0] << 8 | buf[1];
1913 if (s->bca.len < 12 || s->bca.len > 188) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001914 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1915 s->bca.len);
Marcin Slusarzd1941392008-11-16 19:06:37 +01001916 ret = -EIO;
1917 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918 }
1919 memcpy(s->bca.value, &buf[4], s->bca.len);
Marcin Slusarzd1941392008-11-16 19:06:37 +01001920 ret = 0;
1921out:
1922 kfree(buf);
1923 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924}
1925
Marcin Slusarzd1941392008-11-16 19:06:37 +01001926static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1927 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001928{
1929 int ret = 0, size;
1930 u_char *buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 struct cdrom_device_ops *cdo = cdi->ops;
1932
1933 size = sizeof(s->manufact.value) + 4;
1934
Marcin Slusarzd1941392008-11-16 19:06:37 +01001935 buf = kmalloc(size, GFP_KERNEL);
1936 if (!buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001937 return -ENOMEM;
1938
Marcin Slusarzd1941392008-11-16 19:06:37 +01001939 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1940 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1941 cgc->cmd[7] = s->type;
1942 cgc->cmd[8] = size >> 8;
1943 cgc->cmd[9] = size & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001944
Marcin Slusarzd1941392008-11-16 19:06:37 +01001945 ret = cdo->generic_packet(cdi, cgc);
1946 if (ret)
1947 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001948
1949 s->manufact.len = buf[0] << 8 | buf[1];
Andrew Mortonaec9f372011-08-02 12:43:50 +02001950 if (s->manufact.len < 0) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1952 s->manufact.len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953 ret = -EIO;
1954 } else {
Andrew Mortonaec9f372011-08-02 12:43:50 +02001955 if (s->manufact.len > 2048) {
Joe Perches5944b2c2014-05-04 17:05:02 -07001956 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1957 s->manufact.len);
Andrew Mortonaec9f372011-08-02 12:43:50 +02001958 s->manufact.len = 2048;
1959 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1961 }
1962
Marcin Slusarzd1941392008-11-16 19:06:37 +01001963out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001964 kfree(buf);
1965 return ret;
1966}
1967
Marcin Slusarzd1941392008-11-16 19:06:37 +01001968static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1969 struct packet_command *cgc)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970{
1971 switch (s->type) {
1972 case DVD_STRUCT_PHYSICAL:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001973 return dvd_read_physical(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974
1975 case DVD_STRUCT_COPYRIGHT:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001976 return dvd_read_copyright(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977
1978 case DVD_STRUCT_DISCKEY:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001979 return dvd_read_disckey(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001980
1981 case DVD_STRUCT_BCA:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001982 return dvd_read_bca(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001983
1984 case DVD_STRUCT_MANUFACT:
Marcin Slusarzd1941392008-11-16 19:06:37 +01001985 return dvd_read_manufact(cdi, s, cgc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001986
1987 default:
Joe Perches5944b2c2014-05-04 17:05:02 -07001988 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1989 s->type);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001990 return -EINVAL;
1991 }
1992}
1993
1994int cdrom_mode_sense(struct cdrom_device_info *cdi,
1995 struct packet_command *cgc,
1996 int page_code, int page_control)
1997{
1998 struct cdrom_device_ops *cdo = cdi->ops;
1999
2000 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2001
2002 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2003 cgc->cmd[2] = page_code | (page_control << 6);
2004 cgc->cmd[7] = cgc->buflen >> 8;
2005 cgc->cmd[8] = cgc->buflen & 0xff;
2006 cgc->data_direction = CGC_DATA_READ;
2007 return cdo->generic_packet(cdi, cgc);
2008}
2009
2010int cdrom_mode_select(struct cdrom_device_info *cdi,
2011 struct packet_command *cgc)
2012{
2013 struct cdrom_device_ops *cdo = cdi->ops;
2014
2015 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2016 memset(cgc->buffer, 0, 2);
2017 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2018 cgc->cmd[1] = 0x10; /* PF */
2019 cgc->cmd[7] = cgc->buflen >> 8;
2020 cgc->cmd[8] = cgc->buflen & 0xff;
2021 cgc->data_direction = CGC_DATA_WRITE;
2022 return cdo->generic_packet(cdi, cgc);
2023}
2024
2025static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2026 struct cdrom_subchnl *subchnl, int mcn)
2027{
2028 struct cdrom_device_ops *cdo = cdi->ops;
2029 struct packet_command cgc;
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002030 char buffer[32];
Linus Torvalds1da177e2005-04-16 15:20:36 -07002031 int ret;
2032
2033 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2034 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2035 cgc.cmd[1] = 2; /* MSF addressing */
2036 cgc.cmd[2] = 0x40; /* request subQ data */
2037 cgc.cmd[3] = mcn ? 2 : 1;
2038 cgc.cmd[8] = 16;
2039
2040 if ((ret = cdo->generic_packet(cdi, &cgc)))
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002041 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002042
2043 subchnl->cdsc_audiostatus = cgc.buffer[1];
2044 subchnl->cdsc_format = CDROM_MSF;
2045 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2046 subchnl->cdsc_trk = cgc.buffer[6];
2047 subchnl->cdsc_ind = cgc.buffer[7];
2048
2049 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2050 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2051 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2052 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2053 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2054 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2055
FUJITA Tomonorifce53842008-07-04 09:33:01 +02002056 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002057}
2058
2059/*
2060 * Specific READ_10 interface
2061 */
2062static int cdrom_read_cd(struct cdrom_device_info *cdi,
2063 struct packet_command *cgc, int lba,
2064 int blocksize, int nblocks)
2065{
2066 struct cdrom_device_ops *cdo = cdi->ops;
2067
2068 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2069 cgc->cmd[0] = GPCMD_READ_10;
2070 cgc->cmd[2] = (lba >> 24) & 0xff;
2071 cgc->cmd[3] = (lba >> 16) & 0xff;
2072 cgc->cmd[4] = (lba >> 8) & 0xff;
2073 cgc->cmd[5] = lba & 0xff;
2074 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2075 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2076 cgc->cmd[8] = nblocks & 0xff;
2077 cgc->buflen = blocksize * nblocks;
2078 return cdo->generic_packet(cdi, cgc);
2079}
2080
2081/* very generic interface for reading the various types of blocks */
2082static int cdrom_read_block(struct cdrom_device_info *cdi,
2083 struct packet_command *cgc,
2084 int lba, int nblocks, int format, int blksize)
2085{
2086 struct cdrom_device_ops *cdo = cdi->ops;
2087
2088 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2089 cgc->cmd[0] = GPCMD_READ_CD;
2090 /* expected sector size - cdda,mode1,etc. */
2091 cgc->cmd[1] = format << 2;
2092 /* starting address */
2093 cgc->cmd[2] = (lba >> 24) & 0xff;
2094 cgc->cmd[3] = (lba >> 16) & 0xff;
2095 cgc->cmd[4] = (lba >> 8) & 0xff;
2096 cgc->cmd[5] = lba & 0xff;
2097 /* number of blocks */
2098 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2099 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2100 cgc->cmd[8] = nblocks & 0xff;
2101 cgc->buflen = blksize * nblocks;
2102
2103 /* set the header info returned */
2104 switch (blksize) {
2105 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2106 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2107 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2108 default : cgc->cmd[9] = 0x10;
2109 }
2110
2111 return cdo->generic_packet(cdi, cgc);
2112}
2113
2114static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2115 int lba, int nframes)
2116{
2117 struct packet_command cgc;
2118 int ret = 0;
2119 int nr;
2120
2121 cdi->last_sense = 0;
2122
2123 memset(&cgc, 0, sizeof(cgc));
2124
2125 /*
2126 * start with will ra.nframes size, back down if alloc fails
2127 */
2128 nr = nframes;
2129 do {
2130 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2131 if (cgc.buffer)
2132 break;
2133
2134 nr >>= 1;
2135 } while (nr);
2136
2137 if (!nr)
2138 return -ENOMEM;
2139
Linus Torvalds1da177e2005-04-16 15:20:36 -07002140 cgc.data_direction = CGC_DATA_READ;
2141 while (nframes > 0) {
2142 if (nr > nframes)
2143 nr = nframes;
2144
2145 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2146 if (ret)
2147 break;
Dan Carpenter822bfa52012-02-06 10:20:45 +01002148 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002149 ret = -EFAULT;
2150 break;
2151 }
2152 ubuf += CD_FRAMESIZE_RAW * nr;
2153 nframes -= nr;
2154 lba += nr;
2155 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002156 kfree(cgc.buffer);
2157 return ret;
2158}
2159
2160static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2161 int lba, int nframes)
2162{
Jens Axboe165125e2007-07-24 09:28:11 +02002163 struct request_queue *q = cdi->disk->queue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002164 struct request *rq;
2165 struct bio *bio;
2166 unsigned int len;
2167 int nr, ret = 0;
2168
2169 if (!q)
2170 return -ENXIO;
2171
2172 cdi->last_sense = 0;
2173
2174 while (nframes) {
2175 nr = nframes;
2176 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2177 nr = 1;
Martin K. Petersenae03bf62009-05-22 17:17:50 -04002178 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2179 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180
2181 len = nr * CD_FRAMESIZE_RAW;
2182
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002183 rq = blk_get_request(q, READ, GFP_KERNEL);
Joe Lawrencea492f072014-08-28 08:15:21 -06002184 if (IS_ERR(rq)) {
2185 ret = PTR_ERR(rq);
Jens Axboedd1cab92005-06-20 14:06:01 +02002186 break;
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002187 }
Jens Axboef27b0872014-06-06 07:57:37 -06002188 blk_rq_set_block_pc(rq);
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002189
2190 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2191 if (ret) {
2192 blk_put_request(rq);
2193 break;
2194 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195
Linus Torvalds1da177e2005-04-16 15:20:36 -07002196 rq->cmd[0] = GPCMD_READ_CD;
2197 rq->cmd[1] = 1 << 2;
2198 rq->cmd[2] = (lba >> 24) & 0xff;
2199 rq->cmd[3] = (lba >> 16) & 0xff;
2200 rq->cmd[4] = (lba >> 8) & 0xff;
2201 rq->cmd[5] = lba & 0xff;
2202 rq->cmd[6] = (nr >> 16) & 0xff;
2203 rq->cmd[7] = (nr >> 8) & 0xff;
2204 rq->cmd[8] = nr & 0xff;
2205 rq->cmd[9] = 0xf8;
2206
2207 rq->cmd_len = 12;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208 rq->timeout = 60 * HZ;
2209 bio = rq->bio;
2210
James Bottomley 994ca9a2005-06-20 14:11:09 +02002211 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002212 struct request_sense *s = rq->sense;
2213 ret = -EIO;
2214 cdi->last_sense = s->sense_key;
2215 }
2216
Jens Axboe8e5cfc42006-12-19 11:12:46 +01002217 if (blk_rq_unmap_user(bio))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002218 ret = -EFAULT;
Alan D. Brunellefebd7a52008-12-09 15:52:15 +01002219 blk_put_request(rq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002220
2221 if (ret)
2222 break;
2223
2224 nframes -= nr;
2225 lba += nr;
2226 ubuf += len;
2227 }
2228
Linus Torvalds1da177e2005-04-16 15:20:36 -07002229 return ret;
2230}
2231
2232static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2233 int lba, int nframes)
2234{
2235 int ret;
2236
2237 if (cdi->cdda_method == CDDA_OLD)
2238 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2239
2240retry:
2241 /*
2242 * for anything else than success and io error, we need to retry
2243 */
2244 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2245 if (!ret || ret != -EIO)
2246 return ret;
2247
2248 /*
2249 * I've seen drives get sense 4/8/3 udma crc errors on multi
2250 * frame dma, so drop to single frame dma if we need to
2251 */
2252 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
Joe Perchese597cd02010-07-01 08:24:32 +02002253 pr_info("dropping to single frame dma\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002254 cdi->cdda_method = CDDA_BPC_SINGLE;
2255 goto retry;
2256 }
2257
2258 /*
2259 * so we have an io error of some sort with multi frame dma. if the
2260 * condition wasn't a hardware error
2261 * problems, not for any error
2262 */
2263 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2264 return ret;
2265
Joe Perchese597cd02010-07-01 08:24:32 +02002266 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002267 cdi->cdda_method = CDDA_OLD;
2268 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2269}
2270
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002271static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2272 void __user *argp)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002273{
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002274 struct cdrom_multisession ms_info;
2275 u8 requested_format;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002276 int ret;
2277
Joe Perches5944b2c2014-05-04 17:05:02 -07002278 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002279
2280 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2281 return -ENOSYS;
2282
2283 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2284 return -EFAULT;
2285
2286 requested_format = ms_info.addr_format;
2287 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2288 return -EINVAL;
2289 ms_info.addr_format = CDROM_LBA;
2290
2291 ret = cdi->ops->get_last_session(cdi, &ms_info);
2292 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002293 return ret;
2294
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002295 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2296
2297 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2298 return -EFAULT;
2299
Joe Perches5944b2c2014-05-04 17:05:02 -07002300 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002301 return 0;
2302}
2303
2304static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2305{
Joe Perches5944b2c2014-05-04 17:05:02 -07002306 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002307
2308 if (!CDROM_CAN(CDC_OPEN_TRAY))
2309 return -ENOSYS;
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002310 if (cdi->use_count != 1 || cdi->keeplocked)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002311 return -EBUSY;
2312 if (CDROM_CAN(CDC_LOCK)) {
2313 int ret = cdi->ops->lock_door(cdi, 0);
2314 if (ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002315 return ret;
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002316 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002317
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002318 return cdi->ops->tray_move(cdi, 1);
2319}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002320
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002321static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2322{
Joe Perches5944b2c2014-05-04 17:05:02 -07002323 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002324
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002325 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2326 return -ENOSYS;
2327 return cdi->ops->tray_move(cdi, 0);
2328}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002329
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002330static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2331 unsigned long arg)
2332{
Joe Perches5944b2c2014-05-04 17:05:02 -07002333 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002334
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002335 if (!CDROM_CAN(CDC_OPEN_TRAY))
2336 return -ENOSYS;
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002337 if (cdi->keeplocked)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002338 return -EBUSY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002340 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2341 if (arg)
2342 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2343 return 0;
2344}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002345
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002346static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2347 unsigned long arg)
2348{
2349 struct cdrom_changer_info *info;
2350 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002351
Joe Perches5944b2c2014-05-04 17:05:02 -07002352 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002353
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002354 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2355 return -ENOSYS;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002356
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002357 /* cannot select disc or select current disc */
2358 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2359 return media_changed(cdi, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002360
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002361 if ((unsigned int)arg >= cdi->capacity)
2362 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002363
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002364 info = kmalloc(sizeof(*info), GFP_KERNEL);
2365 if (!info)
2366 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002367
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002368 ret = cdrom_read_mech_status(cdi, info);
2369 if (!ret)
2370 ret = info->slots[arg].change;
2371 kfree(info);
2372 return ret;
2373}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002374
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002375static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2376 unsigned long arg)
2377{
Joe Perches5944b2c2014-05-04 17:05:02 -07002378 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002379
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002380 /*
2381 * Options need to be in sync with capability.
2382 * Too late for that, so we have to check each one separately.
2383 */
2384 switch (arg) {
2385 case CDO_USE_FFLAGS:
2386 case CDO_CHECK_TYPE:
2387 break;
2388 case CDO_LOCK:
Linus Torvalds1da177e2005-04-16 15:20:36 -07002389 if (!CDROM_CAN(CDC_LOCK))
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002390 return -ENOSYS;
2391 break;
2392 case 0:
2393 return cdi->options;
2394 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2395 default:
2396 if (!CDROM_CAN(arg))
2397 return -ENOSYS;
2398 }
2399 cdi->options |= (int) arg;
2400 return cdi->options;
2401}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002402
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002403static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2404 unsigned long arg)
2405{
Joe Perches5944b2c2014-05-04 17:05:02 -07002406 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002407
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002408 cdi->options &= ~(int) arg;
2409 return cdi->options;
2410}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002411
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002412static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2413 unsigned long arg)
2414{
Joe Perches5944b2c2014-05-04 17:05:02 -07002415 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002416
2417 if (!CDROM_CAN(CDC_SELECT_SPEED))
2418 return -ENOSYS;
2419 return cdi->ops->select_speed(cdi, arg);
2420}
2421
2422static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2423 unsigned long arg)
2424{
Joe Perches5944b2c2014-05-04 17:05:02 -07002425 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002426
2427 if (!CDROM_CAN(CDC_SELECT_DISC))
2428 return -ENOSYS;
2429
2430 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2431 if ((int)arg >= cdi->capacity)
2432 return -EINVAL;
2433 }
2434
2435 /*
2436 * ->select_disc is a hook to allow a driver-specific way of
2437 * seleting disc. However, since there is no equivalent hook for
2438 * cdrom_slot_status this may not actually be useful...
2439 */
2440 if (cdi->ops->select_disc)
2441 return cdi->ops->select_disc(cdi, arg);
2442
Joe Perches5944b2c2014-05-04 17:05:02 -07002443 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002444 return cdrom_select_disc(cdi, arg);
2445}
2446
2447static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2448 struct block_device *bdev)
2449{
Joe Perches5944b2c2014-05-04 17:05:02 -07002450 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002451
2452 if (!capable(CAP_SYS_ADMIN))
2453 return -EACCES;
2454 if (!CDROM_CAN(CDC_RESET))
2455 return -ENOSYS;
Peter Zijlstraf98393a2007-05-06 14:49:54 -07002456 invalidate_bdev(bdev);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002457 return cdi->ops->reset(cdi);
2458}
2459
2460static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2461 unsigned long arg)
2462{
Joe Perches5944b2c2014-05-04 17:05:02 -07002463 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002464
2465 if (!CDROM_CAN(CDC_LOCK))
2466 return -EDRIVE_CANT_DO_THIS;
2467
Paolo Bonzinicdccaa92012-02-08 20:03:14 +01002468 cdi->keeplocked = arg ? 1 : 0;
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002469
2470 /*
2471 * Don't unlock the door on multiple opens by default, but allow
2472 * root to do so.
2473 */
2474 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2475 return -EBUSY;
2476 return cdi->ops->lock_door(cdi, arg);
2477}
2478
2479static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2480 unsigned long arg)
2481{
Joe Perches5944b2c2014-05-04 17:05:02 -07002482 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002483
2484 if (!capable(CAP_SYS_ADMIN))
2485 return -EACCES;
2486 debug = arg ? 1 : 0;
2487 return debug;
2488}
2489
2490static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2491{
Joe Perches5944b2c2014-05-04 17:05:02 -07002492 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002493 return (cdi->ops->capability & ~cdi->mask);
2494}
2495
2496/*
2497 * The following function is implemented, although very few audio
Linus Torvalds1da177e2005-04-16 15:20:36 -07002498 * discs give Universal Product Code information, which should just be
2499 * the Medium Catalog Number on the box. Note, that the way the code
2500 * is written on the CD is /not/ uniform across all discs!
2501 */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002502static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2503 void __user *argp)
2504{
2505 struct cdrom_mcn mcn;
2506 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002507
Joe Perches5944b2c2014-05-04 17:05:02 -07002508 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002509
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002510 if (!(cdi->ops->capability & CDC_MCN))
2511 return -ENOSYS;
2512 ret = cdi->ops->get_mcn(cdi, &mcn);
2513 if (ret)
2514 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002515
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002516 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2517 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002518 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002519 return 0;
2520}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002521
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002522static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2523 unsigned long arg)
2524{
Joe Perches5944b2c2014-05-04 17:05:02 -07002525 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07002526
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002527 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2528 return -ENOSYS;
2529 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2530 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2531 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2532 if (((int)arg >= cdi->capacity))
2533 return -EINVAL;
2534 return cdrom_slot_status(cdi, arg);
2535}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002536
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002537/*
2538 * Ok, this is where problems start. The current interface for the
2539 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002540 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002541 * is often the case, it is also very common for CDs to have some tracks
2542 * with data, and some tracks with audio. Just because I feel like it,
2543 * I declare the following to be the best way to cope. If the CD has ANY
2544 * data tracks on it, it will be returned as a data CD. If it has any XA
2545 * tracks, I will return it as that. Now I could simplify this interface
2546 * by combining these returns with the above, but this more clearly
2547 * demonstrates the problem with the current interface. Too bad this
2548 * wasn't designed to use bitmasks... -Erik
2549 *
2550 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2551 * User level programmers might feel the ioctl is not very useful.
2552 * ---david
2553 */
2554static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2555{
2556 tracktype tracks;
2557
Joe Perches5944b2c2014-05-04 17:05:02 -07002558 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002559
2560 cdrom_count_tracks(cdi, &tracks);
2561 if (tracks.error)
2562 return tracks.error;
2563
2564 /* Policy mode on */
2565 if (tracks.audio > 0) {
2566 if (!tracks.data && !tracks.cdi && !tracks.xa)
2567 return CDS_AUDIO;
2568 else
2569 return CDS_MIXED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002570 }
2571
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002572 if (tracks.cdi > 0)
2573 return CDS_XA_2_2;
2574 if (tracks.xa > 0)
2575 return CDS_XA_2_1;
2576 if (tracks.data > 0)
2577 return CDS_DATA_1;
2578 /* Policy mode off */
2579
Joe Perches5944b2c2014-05-04 17:05:02 -07002580 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002581 return CDS_NO_INFO;
2582}
2583
2584static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2585{
Joe Perches5944b2c2014-05-04 17:05:02 -07002586 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002587 return cdi->capacity;
2588}
2589
2590static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2591 void __user *argp)
2592{
2593 struct cdrom_subchnl q;
2594 u8 requested, back;
2595 int ret;
2596
Joe Perches5944b2c2014-05-04 17:05:02 -07002597 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002598
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002599 if (copy_from_user(&q, argp, sizeof(q)))
2600 return -EFAULT;
2601
2602 requested = q.cdsc_format;
2603 if (requested != CDROM_MSF && requested != CDROM_LBA)
2604 return -EINVAL;
2605 q.cdsc_format = CDROM_MSF;
2606
2607 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2608 if (ret)
2609 return ret;
2610
2611 back = q.cdsc_format; /* local copy */
2612 sanitize_format(&q.cdsc_absaddr, &back, requested);
2613 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2614
2615 if (copy_to_user(argp, &q, sizeof(q)))
2616 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002617 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002618 return 0;
2619}
2620
2621static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2622 void __user *argp)
2623{
2624 struct cdrom_tochdr header;
2625 int ret;
2626
Joe Perches5944b2c2014-05-04 17:05:02 -07002627 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002628
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002629 if (copy_from_user(&header, argp, sizeof(header)))
2630 return -EFAULT;
2631
2632 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2633 if (ret)
2634 return ret;
2635
2636 if (copy_to_user(argp, &header, sizeof(header)))
2637 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002638 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002639 return 0;
2640}
2641
2642static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2643 void __user *argp)
2644{
2645 struct cdrom_tocentry entry;
2646 u8 requested_format;
2647 int ret;
2648
Joe Perches5944b2c2014-05-04 17:05:02 -07002649 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002650
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002651 if (copy_from_user(&entry, argp, sizeof(entry)))
2652 return -EFAULT;
2653
2654 requested_format = entry.cdte_format;
2655 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2656 return -EINVAL;
2657 /* make interface to low-level uniform */
2658 entry.cdte_format = CDROM_MSF;
2659 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2660 if (ret)
2661 return ret;
2662 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2663
2664 if (copy_to_user(argp, &entry, sizeof(entry)))
2665 return -EFAULT;
Joe Perches5944b2c2014-05-04 17:05:02 -07002666 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002667 return 0;
2668}
2669
2670static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2671 void __user *argp)
2672{
2673 struct cdrom_msf msf;
2674
Joe Perches5944b2c2014-05-04 17:05:02 -07002675 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002676
2677 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2678 return -ENOSYS;
2679 if (copy_from_user(&msf, argp, sizeof(msf)))
2680 return -EFAULT;
2681 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2682}
2683
2684static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2685 void __user *argp)
2686{
2687 struct cdrom_ti ti;
2688 int ret;
2689
Joe Perches5944b2c2014-05-04 17:05:02 -07002690 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002691
2692 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2693 return -ENOSYS;
2694 if (copy_from_user(&ti, argp, sizeof(ti)))
2695 return -EFAULT;
2696
2697 ret = check_for_audio_disc(cdi, cdi->ops);
2698 if (ret)
2699 return ret;
2700 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2701}
2702static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2703 void __user *argp)
2704{
2705 struct cdrom_volctrl volume;
2706
Joe Perches5944b2c2014-05-04 17:05:02 -07002707 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002708
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2710 return -ENOSYS;
2711 if (copy_from_user(&volume, argp, sizeof(volume)))
2712 return -EFAULT;
2713 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2714}
2715
2716static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2717 void __user *argp)
2718{
2719 struct cdrom_volctrl volume;
2720 int ret;
2721
Joe Perches5944b2c2014-05-04 17:05:02 -07002722 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002723
2724 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2725 return -ENOSYS;
2726
2727 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2728 if (ret)
2729 return ret;
2730
2731 if (copy_to_user(argp, &volume, sizeof(volume)))
2732 return -EFAULT;
2733 return 0;
2734}
2735
2736static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2737 unsigned int cmd)
2738{
2739 int ret;
2740
Joe Perches5944b2c2014-05-04 17:05:02 -07002741 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08002742
2743 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2744 return -ENOSYS;
2745 ret = check_for_audio_disc(cdi, cdi->ops);
2746 if (ret)
2747 return ret;
2748 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2749}
2750
2751/*
Joe Perches2e9aa082014-05-04 17:05:08 -07002752 * Required when we need to use READ_10 to issue other than 2048 block
2753 * reads
2754 */
2755static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2756{
2757 struct cdrom_device_ops *cdo = cdi->ops;
2758 struct packet_command cgc;
2759 struct modesel_head mh;
2760
2761 memset(&mh, 0, sizeof(mh));
2762 mh.block_desc_length = 0x08;
2763 mh.block_length_med = (size >> 8) & 0xff;
2764 mh.block_length_lo = size & 0xff;
2765
2766 memset(&cgc, 0, sizeof(cgc));
2767 cgc.cmd[0] = 0x15;
2768 cgc.cmd[1] = 1 << 4;
2769 cgc.cmd[4] = 12;
2770 cgc.buflen = sizeof(mh);
2771 cgc.buffer = (char *) &mh;
2772 cgc.data_direction = CGC_DATA_WRITE;
2773 mh.block_desc_length = 0x08;
2774 mh.block_length_med = (size >> 8) & 0xff;
2775 mh.block_length_lo = size & 0xff;
2776
2777 return cdo->generic_packet(cdi, &cgc);
2778}
2779
Joe Perchese1e60fd2014-05-04 17:05:09 -07002780static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2781 __u16 track, __u8 type, track_information *ti)
2782{
2783 struct cdrom_device_ops *cdo = cdi->ops;
2784 struct packet_command cgc;
2785 int ret, buflen;
2786
2787 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2788 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2789 cgc.cmd[1] = type & 3;
2790 cgc.cmd[4] = (track & 0xff00) >> 8;
2791 cgc.cmd[5] = track & 0xff;
2792 cgc.cmd[8] = 8;
2793 cgc.quiet = 1;
2794
2795 ret = cdo->generic_packet(cdi, &cgc);
2796 if (ret)
2797 return ret;
2798
2799 buflen = be16_to_cpu(ti->track_information_length) +
2800 sizeof(ti->track_information_length);
2801
2802 if (buflen > sizeof(track_information))
2803 buflen = sizeof(track_information);
2804
2805 cgc.cmd[8] = cgc.buflen = buflen;
2806 ret = cdo->generic_packet(cdi, &cgc);
2807 if (ret)
2808 return ret;
2809
2810 /* return actual fill size */
2811 return buflen;
2812}
2813
2814/* return the last written block on the CD-R media. this is for the udf
2815 file system. */
2816int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2817{
2818 struct cdrom_tocentry toc;
2819 disc_information di;
2820 track_information ti;
2821 __u32 last_track;
2822 int ret = -1, ti_size;
2823
2824 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2825 goto use_toc;
2826
2827 ret = cdrom_get_disc_info(cdi, &di);
2828 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2829 + sizeof(di.last_track_lsb)))
2830 goto use_toc;
2831
2832 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2833 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2834 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2835 if (ti_size < (int)offsetof(typeof(ti), track_start))
2836 goto use_toc;
2837
2838 /* if this track is blank, try the previous. */
2839 if (ti.blank) {
2840 if (last_track == 1)
2841 goto use_toc;
2842 last_track--;
2843 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2844 }
2845
2846 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2847 + sizeof(ti.track_size)))
2848 goto use_toc;
2849
2850 /* if last recorded field is valid, return it. */
2851 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2852 + sizeof(ti.last_rec_address))) {
2853 *last_written = be32_to_cpu(ti.last_rec_address);
2854 } else {
2855 /* make it up instead */
2856 *last_written = be32_to_cpu(ti.track_start) +
2857 be32_to_cpu(ti.track_size);
2858 if (ti.free_blocks)
2859 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2860 }
2861 return 0;
2862
2863 /* this is where we end up if the drive either can't do a
2864 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2865 it doesn't give enough information or fails. then we return
2866 the toc contents. */
2867use_toc:
2868 toc.cdte_format = CDROM_MSF;
2869 toc.cdte_track = CDROM_LEADOUT;
2870 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2871 return ret;
2872 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2873 *last_written = toc.cdte_addr.lba;
2874 return 0;
2875}
2876
Joe Perchesdac1c5c2014-05-04 17:05:10 -07002877/* return the next writable block. also for udf file system. */
2878static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2879 long *next_writable)
2880{
2881 disc_information di;
2882 track_information ti;
2883 __u16 last_track;
2884 int ret, ti_size;
2885
2886 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2887 goto use_last_written;
2888
2889 ret = cdrom_get_disc_info(cdi, &di);
2890 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2891 + sizeof(di.last_track_lsb))
2892 goto use_last_written;
2893
2894 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2895 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2896 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2897 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2898 goto use_last_written;
2899
2900 /* if this track is blank, try the previous. */
2901 if (ti.blank) {
2902 if (last_track == 1)
2903 goto use_last_written;
2904 last_track--;
2905 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2906 if (ti_size < 0)
2907 goto use_last_written;
2908 }
2909
2910 /* if next recordable address field is valid, use it. */
2911 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2912 + sizeof(ti.next_writable)) {
2913 *next_writable = be32_to_cpu(ti.next_writable);
2914 return 0;
2915 }
2916
2917use_last_written:
2918 ret = cdrom_get_last_written(cdi, next_writable);
2919 if (ret) {
2920 *next_writable = 0;
2921 return ret;
2922 } else {
2923 *next_writable += 7;
2924 return 0;
2925 }
2926}
2927
Joe Perches2e9aa082014-05-04 17:05:08 -07002928static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2929 void __user *arg,
2930 struct packet_command *cgc,
2931 int cmd)
2932{
2933 struct request_sense sense;
2934 struct cdrom_msf msf;
2935 int blocksize = 0, format = 0, lba;
2936 int ret;
2937
2938 switch (cmd) {
2939 case CDROMREADRAW:
2940 blocksize = CD_FRAMESIZE_RAW;
2941 break;
2942 case CDROMREADMODE1:
2943 blocksize = CD_FRAMESIZE;
2944 format = 2;
2945 break;
2946 case CDROMREADMODE2:
2947 blocksize = CD_FRAMESIZE_RAW0;
2948 break;
2949 }
2950 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2951 return -EFAULT;
2952 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2953 /* FIXME: we need upper bound checking, too!! */
2954 if (lba < 0)
2955 return -EINVAL;
2956
2957 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2958 if (cgc->buffer == NULL)
2959 return -ENOMEM;
2960
2961 memset(&sense, 0, sizeof(sense));
2962 cgc->sense = &sense;
2963 cgc->data_direction = CGC_DATA_READ;
2964 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2965 if (ret && sense.sense_key == 0x05 &&
2966 sense.asc == 0x20 &&
2967 sense.ascq == 0x00) {
2968 /*
2969 * SCSI-II devices are not required to support
2970 * READ_CD, so let's try switching block size
2971 */
2972 /* FIXME: switch back again... */
2973 ret = cdrom_switch_blocksize(cdi, blocksize);
2974 if (ret)
2975 goto out;
2976 cgc->sense = NULL;
2977 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2978 ret |= cdrom_switch_blocksize(cdi, blocksize);
2979 }
2980 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2981 ret = -EFAULT;
2982out:
2983 kfree(cgc->buffer);
2984 return ret;
2985}
2986
2987static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2988 void __user *arg)
2989{
2990 struct cdrom_read_audio ra;
2991 int lba;
2992
2993 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
2994 sizeof(ra)))
2995 return -EFAULT;
2996
2997 if (ra.addr_format == CDROM_MSF)
2998 lba = msf_to_lba(ra.addr.msf.minute,
2999 ra.addr.msf.second,
3000 ra.addr.msf.frame);
3001 else if (ra.addr_format == CDROM_LBA)
3002 lba = ra.addr.lba;
3003 else
3004 return -EINVAL;
3005
3006 /* FIXME: we need upper bound checking, too!! */
3007 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3008 return -EINVAL;
3009
3010 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3011}
3012
3013static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3014 void __user *arg)
3015{
3016 int ret;
3017 struct cdrom_subchnl q;
3018 u_char requested, back;
3019 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3020 return -EFAULT;
3021 requested = q.cdsc_format;
3022 if (!((requested == CDROM_MSF) ||
3023 (requested == CDROM_LBA)))
3024 return -EINVAL;
3025 q.cdsc_format = CDROM_MSF;
3026 ret = cdrom_read_subchannel(cdi, &q, 0);
3027 if (ret)
3028 return ret;
3029 back = q.cdsc_format; /* local copy */
3030 sanitize_format(&q.cdsc_absaddr, &back, requested);
3031 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3032 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3033 return -EFAULT;
3034 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3035 return 0;
3036}
3037
3038static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3039 void __user *arg,
3040 struct packet_command *cgc)
3041{
3042 struct cdrom_device_ops *cdo = cdi->ops;
3043 struct cdrom_msf msf;
3044 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3045 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3046 return -EFAULT;
3047 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3048 cgc->cmd[3] = msf.cdmsf_min0;
3049 cgc->cmd[4] = msf.cdmsf_sec0;
3050 cgc->cmd[5] = msf.cdmsf_frame0;
3051 cgc->cmd[6] = msf.cdmsf_min1;
3052 cgc->cmd[7] = msf.cdmsf_sec1;
3053 cgc->cmd[8] = msf.cdmsf_frame1;
3054 cgc->data_direction = CGC_DATA_NONE;
3055 return cdo->generic_packet(cdi, cgc);
3056}
3057
3058static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3059 void __user *arg,
3060 struct packet_command *cgc)
3061{
3062 struct cdrom_device_ops *cdo = cdi->ops;
3063 struct cdrom_blk blk;
3064 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3065 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3066 return -EFAULT;
3067 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3068 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3069 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3070 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3071 cgc->cmd[5] = blk.from & 0xff;
3072 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3073 cgc->cmd[8] = blk.len & 0xff;
3074 cgc->data_direction = CGC_DATA_NONE;
3075 return cdo->generic_packet(cdi, cgc);
3076}
3077
3078static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3079 void __user *arg,
3080 struct packet_command *cgc,
3081 unsigned int cmd)
3082{
3083 struct cdrom_volctrl volctrl;
3084 unsigned char buffer[32];
3085 char mask[sizeof(buffer)];
3086 unsigned short offset;
3087 int ret;
3088
3089 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3090
3091 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3092 sizeof(volctrl)))
3093 return -EFAULT;
3094
3095 cgc->buffer = buffer;
3096 cgc->buflen = 24;
3097 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3098 if (ret)
3099 return ret;
3100
3101 /* originally the code depended on buffer[1] to determine
3102 how much data is available for transfer. buffer[1] is
3103 unfortunately ambigious and the only reliable way seem
3104 to be to simply skip over the block descriptor... */
3105 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3106
3107 if (offset + 16 > sizeof(buffer))
3108 return -E2BIG;
3109
3110 if (offset + 16 > cgc->buflen) {
3111 cgc->buflen = offset + 16;
3112 ret = cdrom_mode_sense(cdi, cgc,
3113 GPMODE_AUDIO_CTL_PAGE, 0);
3114 if (ret)
3115 return ret;
3116 }
3117
3118 /* sanity check */
3119 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3120 buffer[offset + 1] < 14)
3121 return -EINVAL;
3122
3123 /* now we have the current volume settings. if it was only
3124 a CDROMVOLREAD, return these values */
3125 if (cmd == CDROMVOLREAD) {
3126 volctrl.channel0 = buffer[offset+9];
3127 volctrl.channel1 = buffer[offset+11];
3128 volctrl.channel2 = buffer[offset+13];
3129 volctrl.channel3 = buffer[offset+15];
3130 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3131 sizeof(volctrl)))
3132 return -EFAULT;
3133 return 0;
3134 }
3135
3136 /* get the volume mask */
3137 cgc->buffer = mask;
3138 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3139 if (ret)
3140 return ret;
3141
3142 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3143 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3144 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3145 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3146
3147 /* set volume */
3148 cgc->buffer = buffer + offset - 8;
3149 memset(cgc->buffer, 0, 8);
3150 return cdrom_mode_select(cdi, cgc);
3151}
3152
3153static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3154 struct packet_command *cgc,
3155 int cmd)
3156{
3157 struct cdrom_device_ops *cdo = cdi->ops;
3158 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3159 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3160 cgc->cmd[1] = 1;
3161 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3162 cgc->data_direction = CGC_DATA_NONE;
3163 return cdo->generic_packet(cdi, cgc);
3164}
3165
3166static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3167 struct packet_command *cgc,
3168 int cmd)
3169{
3170 struct cdrom_device_ops *cdo = cdi->ops;
3171 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3172 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3173 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3174 cgc->data_direction = CGC_DATA_NONE;
3175 return cdo->generic_packet(cdi, cgc);
3176}
3177
3178static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3179 void __user *arg,
3180 struct packet_command *cgc)
3181{
3182 int ret;
3183 dvd_struct *s;
3184 int size = sizeof(dvd_struct);
3185
3186 if (!CDROM_CAN(CDC_DVD))
3187 return -ENOSYS;
3188
3189 s = kmalloc(size, GFP_KERNEL);
3190 if (!s)
3191 return -ENOMEM;
3192
3193 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3194 if (copy_from_user(s, arg, size)) {
3195 kfree(s);
3196 return -EFAULT;
3197 }
3198
3199 ret = dvd_read_struct(cdi, s, cgc);
3200 if (ret)
3201 goto out;
3202
3203 if (copy_to_user(arg, s, size))
3204 ret = -EFAULT;
3205out:
3206 kfree(s);
3207 return ret;
3208}
3209
3210static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3211 void __user *arg)
3212{
3213 int ret;
3214 dvd_authinfo ai;
3215 if (!CDROM_CAN(CDC_DVD))
3216 return -ENOSYS;
3217 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3218 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3219 return -EFAULT;
3220 ret = dvd_do_auth(cdi, &ai);
3221 if (ret)
3222 return ret;
3223 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3224 return -EFAULT;
3225 return 0;
3226}
3227
3228static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3229 void __user *arg)
3230{
3231 int ret;
3232 long next = 0;
3233 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3234 ret = cdrom_get_next_writable(cdi, &next);
3235 if (ret)
3236 return ret;
3237 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3238 return -EFAULT;
3239 return 0;
3240}
3241
3242static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3243 void __user *arg)
3244{
3245 int ret;
3246 long last = 0;
3247 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3248 ret = cdrom_get_last_written(cdi, &last);
3249 if (ret)
3250 return ret;
3251 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3252 return -EFAULT;
3253 return 0;
3254}
3255
3256static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3257 unsigned long arg)
3258{
3259 struct packet_command cgc;
3260 void __user *userptr = (void __user *)arg;
3261
3262 memset(&cgc, 0, sizeof(cgc));
3263
3264 /* build a unified command and queue it through
3265 cdo->generic_packet() */
3266 switch (cmd) {
3267 case CDROMREADRAW:
3268 case CDROMREADMODE1:
3269 case CDROMREADMODE2:
3270 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3271 case CDROMREADAUDIO:
3272 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3273 case CDROMSUBCHNL:
3274 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3275 case CDROMPLAYMSF:
3276 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3277 case CDROMPLAYBLK:
3278 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3279 case CDROMVOLCTRL:
3280 case CDROMVOLREAD:
3281 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3282 case CDROMSTART:
3283 case CDROMSTOP:
3284 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3285 case CDROMPAUSE:
3286 case CDROMRESUME:
3287 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3288 case DVD_READ_STRUCT:
3289 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3290 case DVD_AUTH:
3291 return mmc_ioctl_dvd_auth(cdi, userptr);
3292 case CDROM_NEXT_WRITABLE:
3293 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3294 case CDROM_LAST_WRITTEN:
3295 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3296 }
3297
3298 return -ENOTTY;
3299}
3300
3301/*
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003302 * Just about every imaginable ioctl is supported in the Uniform layer
3303 * these days.
3304 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3305 */
Al Virobbc1cc92007-10-07 17:54:28 -04003306int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3307 fmode_t mode, unsigned int cmd, unsigned long arg)
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003308{
3309 void __user *argp = (void __user *)arg;
3310 int ret;
3311
3312 /*
3313 * Try the generic SCSI command ioctl's first.
3314 */
Paolo Bonzini577ebb32012-01-12 16:01:27 +01003315 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003316 if (ret != -ENOTTY)
3317 return ret;
3318
3319 switch (cmd) {
3320 case CDROMMULTISESSION:
3321 return cdrom_ioctl_multisession(cdi, argp);
3322 case CDROMEJECT:
3323 return cdrom_ioctl_eject(cdi);
3324 case CDROMCLOSETRAY:
3325 return cdrom_ioctl_closetray(cdi);
3326 case CDROMEJECT_SW:
3327 return cdrom_ioctl_eject_sw(cdi, arg);
3328 case CDROM_MEDIA_CHANGED:
3329 return cdrom_ioctl_media_changed(cdi, arg);
3330 case CDROM_SET_OPTIONS:
3331 return cdrom_ioctl_set_options(cdi, arg);
3332 case CDROM_CLEAR_OPTIONS:
3333 return cdrom_ioctl_clear_options(cdi, arg);
3334 case CDROM_SELECT_SPEED:
3335 return cdrom_ioctl_select_speed(cdi, arg);
3336 case CDROM_SELECT_DISC:
3337 return cdrom_ioctl_select_disc(cdi, arg);
3338 case CDROMRESET:
Al Virobbc1cc92007-10-07 17:54:28 -04003339 return cdrom_ioctl_reset(cdi, bdev);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003340 case CDROM_LOCKDOOR:
3341 return cdrom_ioctl_lock_door(cdi, arg);
3342 case CDROM_DEBUG:
3343 return cdrom_ioctl_debug(cdi, arg);
3344 case CDROM_GET_CAPABILITY:
3345 return cdrom_ioctl_get_capability(cdi);
3346 case CDROM_GET_MCN:
3347 return cdrom_ioctl_get_mcn(cdi, argp);
3348 case CDROM_DRIVE_STATUS:
3349 return cdrom_ioctl_drive_status(cdi, arg);
3350 case CDROM_DISC_STATUS:
3351 return cdrom_ioctl_disc_status(cdi);
3352 case CDROM_CHANGER_NSLOTS:
3353 return cdrom_ioctl_changer_nslots(cdi);
3354 }
3355
3356 /*
3357 * Use the ioctls that are implemented through the generic_packet()
3358 * interface. this may look at bit funny, but if -ENOTTY is
3359 * returned that particular ioctl is not implemented and we
3360 * let it go through the device specific ones.
3361 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003362 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3363 ret = mmc_ioctl(cdi, cmd, arg);
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003364 if (ret != -ENOTTY)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003365 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003366 }
3367
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003368 /*
Joe Perches5944b2c2014-05-04 17:05:02 -07003369 * Note: most of the cd_dbg() calls are commented out here,
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003370 * because they fill up the sys log when CD players poll
3371 * the drive.
3372 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07003373 switch (cmd) {
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003374 case CDROMSUBCHNL:
3375 return cdrom_ioctl_get_subchnl(cdi, argp);
3376 case CDROMREADTOCHDR:
3377 return cdrom_ioctl_read_tochdr(cdi, argp);
3378 case CDROMREADTOCENTRY:
3379 return cdrom_ioctl_read_tocentry(cdi, argp);
3380 case CDROMPLAYMSF:
3381 return cdrom_ioctl_play_msf(cdi, argp);
3382 case CDROMPLAYTRKIND:
3383 return cdrom_ioctl_play_trkind(cdi, argp);
3384 case CDROMVOLCTRL:
3385 return cdrom_ioctl_volctrl(cdi, argp);
3386 case CDROMVOLREAD:
3387 return cdrom_ioctl_volread(cdi, argp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003388 case CDROMSTART:
3389 case CDROMSTOP:
3390 case CDROMPAUSE:
Christoph Hellwigd2c5d4f2006-03-23 03:00:14 -08003391 case CDROMRESUME:
3392 return cdrom_ioctl_audioctl(cdi, cmd);
3393 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003394
Linus Torvalds1da177e2005-04-16 15:20:36 -07003395 return -ENOSYS;
3396}
3397
Linus Torvalds1da177e2005-04-16 15:20:36 -07003398EXPORT_SYMBOL(cdrom_get_last_written);
3399EXPORT_SYMBOL(register_cdrom);
3400EXPORT_SYMBOL(unregister_cdrom);
3401EXPORT_SYMBOL(cdrom_open);
3402EXPORT_SYMBOL(cdrom_release);
3403EXPORT_SYMBOL(cdrom_ioctl);
3404EXPORT_SYMBOL(cdrom_media_changed);
3405EXPORT_SYMBOL(cdrom_number_of_slots);
3406EXPORT_SYMBOL(cdrom_mode_select);
3407EXPORT_SYMBOL(cdrom_mode_sense);
3408EXPORT_SYMBOL(init_cdrom_command);
3409EXPORT_SYMBOL(cdrom_get_media_event);
3410
3411#ifdef CONFIG_SYSCTL
3412
3413#define CDROM_STR_SIZE 1000
3414
3415static struct cdrom_sysctl_settings {
3416 char info[CDROM_STR_SIZE]; /* general info */
3417 int autoclose; /* close tray upon mount, etc */
3418 int autoeject; /* eject on umount */
3419 int debug; /* turn on debugging messages */
3420 int lock; /* lock the door on device open */
3421 int check; /* check media type */
3422} cdrom_sysctl_settings;
3423
Dave Young554988d2007-06-19 09:14:26 +02003424enum cdrom_print_option {
3425 CTL_NAME,
3426 CTL_SPEED,
3427 CTL_SLOTS,
3428 CTL_CAPABILITY
3429};
3430
3431static int cdrom_print_info(const char *header, int val, char *info,
3432 int *pos, enum cdrom_print_option option)
3433{
3434 const int max_size = sizeof(cdrom_sysctl_settings.info);
3435 struct cdrom_device_info *cdi;
3436 int ret;
3437
3438 ret = scnprintf(info + *pos, max_size - *pos, header);
3439 if (!ret)
3440 return 1;
3441
3442 *pos += ret;
3443
Akinobu Mita7fd097d2008-03-26 12:09:02 +01003444 list_for_each_entry(cdi, &cdrom_list, list) {
Dave Young554988d2007-06-19 09:14:26 +02003445 switch (option) {
3446 case CTL_NAME:
3447 ret = scnprintf(info + *pos, max_size - *pos,
3448 "\t%s", cdi->name);
3449 break;
3450 case CTL_SPEED:
3451 ret = scnprintf(info + *pos, max_size - *pos,
3452 "\t%d", cdi->speed);
3453 break;
3454 case CTL_SLOTS:
3455 ret = scnprintf(info + *pos, max_size - *pos,
3456 "\t%d", cdi->capacity);
3457 break;
3458 case CTL_CAPABILITY:
3459 ret = scnprintf(info + *pos, max_size - *pos,
3460 "\t%d", CDROM_CAN(val) != 0);
3461 break;
3462 default:
Joe Perchese597cd02010-07-01 08:24:32 +02003463 pr_info("invalid option%d\n", option);
Dave Young554988d2007-06-19 09:14:26 +02003464 return 1;
3465 }
3466 if (!ret)
3467 return 1;
3468 *pos += ret;
3469 }
3470
3471 return 0;
3472}
3473
Joe Perches90a3b892014-06-06 14:37:57 -07003474static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003475 void __user *buffer, size_t *lenp, loff_t *ppos)
3476{
Dave Young554988d2007-06-19 09:14:26 +02003477 int pos;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003478 char *info = cdrom_sysctl_settings.info;
Dave Young554988d2007-06-19 09:14:26 +02003479 const int max_size = sizeof(cdrom_sysctl_settings.info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003480
3481 if (!*lenp || (*ppos && !write)) {
3482 *lenp = 0;
3483 return 0;
3484 }
3485
Dave Young554988d2007-06-19 09:14:26 +02003486 mutex_lock(&cdrom_mutex);
3487
Linus Torvalds1da177e2005-04-16 15:20:36 -07003488 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3489
Dave Young554988d2007-06-19 09:14:26 +02003490 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3491 goto done;
3492 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3493 goto done;
3494 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3495 goto done;
3496 if (cdrom_print_info("\nCan close tray:\t",
3497 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3498 goto done;
3499 if (cdrom_print_info("\nCan open tray:\t",
3500 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3501 goto done;
3502 if (cdrom_print_info("\nCan lock tray:\t",
3503 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3504 goto done;
3505 if (cdrom_print_info("\nCan change speed:",
3506 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3507 goto done;
3508 if (cdrom_print_info("\nCan select disk:",
3509 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3510 goto done;
3511 if (cdrom_print_info("\nCan read multisession:",
3512 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3513 goto done;
3514 if (cdrom_print_info("\nCan read MCN:\t",
3515 CDC_MCN, info, &pos, CTL_CAPABILITY))
3516 goto done;
3517 if (cdrom_print_info("\nReports media changed:",
3518 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3519 goto done;
3520 if (cdrom_print_info("\nCan play audio:\t",
3521 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3522 goto done;
3523 if (cdrom_print_info("\nCan write CD-R:\t",
3524 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3525 goto done;
3526 if (cdrom_print_info("\nCan write CD-RW:",
3527 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3528 goto done;
3529 if (cdrom_print_info("\nCan read DVD:\t",
3530 CDC_DVD, info, &pos, CTL_CAPABILITY))
3531 goto done;
3532 if (cdrom_print_info("\nCan write DVD-R:",
3533 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3534 goto done;
3535 if (cdrom_print_info("\nCan write DVD-RAM:",
3536 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3537 goto done;
3538 if (cdrom_print_info("\nCan read MRW:\t",
3539 CDC_MRW, info, &pos, CTL_CAPABILITY))
3540 goto done;
3541 if (cdrom_print_info("\nCan write MRW:\t",
3542 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3543 goto done;
3544 if (cdrom_print_info("\nCan write RAM:\t",
3545 CDC_RAM, info, &pos, CTL_CAPABILITY))
3546 goto done;
3547 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3548 goto done;
3549doit:
3550 mutex_unlock(&cdrom_mutex);
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07003551 return proc_dostring(ctl, write, buffer, lenp, ppos);
Dave Young554988d2007-06-19 09:14:26 +02003552done:
Joe Perchese597cd02010-07-01 08:24:32 +02003553 pr_info("info buffer too small\n");
Dave Young554988d2007-06-19 09:14:26 +02003554 goto doit;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003555}
3556
3557/* Unfortunately, per device settings are not implemented through
3558 procfs/sysctl yet. When they are, this will naturally disappear. For now
3559 just update all drives. Later this will become the template on which
3560 new registered drives will be based. */
3561static void cdrom_update_settings(void)
3562{
3563 struct cdrom_device_info *cdi;
3564
Akinobu Mita032d8d92008-03-26 12:09:01 +01003565 mutex_lock(&cdrom_mutex);
Akinobu Mita7fd097d2008-03-26 12:09:02 +01003566 list_for_each_entry(cdi, &cdrom_list, list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003567 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3568 cdi->options |= CDO_AUTO_CLOSE;
3569 else if (!autoclose)
3570 cdi->options &= ~CDO_AUTO_CLOSE;
3571 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3572 cdi->options |= CDO_AUTO_EJECT;
3573 else if (!autoeject)
3574 cdi->options &= ~CDO_AUTO_EJECT;
3575 if (lockdoor && CDROM_CAN(CDC_LOCK))
3576 cdi->options |= CDO_LOCK;
3577 else if (!lockdoor)
3578 cdi->options &= ~CDO_LOCK;
3579 if (check_media_type)
3580 cdi->options |= CDO_CHECK_TYPE;
3581 else
3582 cdi->options &= ~CDO_CHECK_TYPE;
3583 }
Akinobu Mita032d8d92008-03-26 12:09:01 +01003584 mutex_unlock(&cdrom_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003585}
3586
Joe Perches90a3b892014-06-06 14:37:57 -07003587static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003588 void __user *buffer, size_t *lenp, loff_t *ppos)
3589{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003590 int ret;
3591
Alexey Dobriyan8d65af72009-09-23 15:57:19 -07003592 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003593
Eric W. Biederman06489b42007-10-18 03:05:28 -07003594 if (write) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003595
3596 /* we only care for 1 or 0. */
Eric W. Biederman06489b42007-10-18 03:05:28 -07003597 autoclose = !!cdrom_sysctl_settings.autoclose;
3598 autoeject = !!cdrom_sysctl_settings.autoeject;
3599 debug = !!cdrom_sysctl_settings.debug;
3600 lockdoor = !!cdrom_sysctl_settings.lock;
3601 check_media_type = !!cdrom_sysctl_settings.check;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003602
Linus Torvalds1da177e2005-04-16 15:20:36 -07003603 /* update the option flags according to the changes. we
3604 don't have per device options through sysctl yet,
3605 but we will have and then this will disappear. */
3606 cdrom_update_settings();
3607 }
3608
3609 return ret;
3610}
3611
3612/* Place files in /proc/sys/dev/cdrom */
Joe Perches90a3b892014-06-06 14:37:57 -07003613static struct ctl_table cdrom_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003614 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003615 .procname = "info",
3616 .data = &cdrom_sysctl_settings.info,
3617 .maxlen = CDROM_STR_SIZE,
3618 .mode = 0444,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003619 .proc_handler = cdrom_sysctl_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620 },
3621 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003622 .procname = "autoclose",
3623 .data = &cdrom_sysctl_settings.autoclose,
3624 .maxlen = sizeof(int),
3625 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003626 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003627 },
3628 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003629 .procname = "autoeject",
3630 .data = &cdrom_sysctl_settings.autoeject,
3631 .maxlen = sizeof(int),
3632 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003633 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003634 },
3635 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003636 .procname = "debug",
3637 .data = &cdrom_sysctl_settings.debug,
3638 .maxlen = sizeof(int),
3639 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003640 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003641 },
3642 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003643 .procname = "lock",
3644 .data = &cdrom_sysctl_settings.lock,
3645 .maxlen = sizeof(int),
3646 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003647 .proc_handler = cdrom_sysctl_handler,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003648 },
3649 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003650 .procname = "check_media",
3651 .data = &cdrom_sysctl_settings.check,
3652 .maxlen = sizeof(int),
3653 .mode = 0644,
Eric W. Biederman6d456112009-11-16 03:11:48 -08003654 .proc_handler = cdrom_sysctl_handler
Linus Torvalds1da177e2005-04-16 15:20:36 -07003655 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003656 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003657};
3658
Joe Perches90a3b892014-06-06 14:37:57 -07003659static struct ctl_table cdrom_cdrom_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003660 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003661 .procname = "cdrom",
3662 .maxlen = 0,
3663 .mode = 0555,
3664 .child = cdrom_table,
3665 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003666 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003667};
3668
3669/* Make sure that /proc/sys/dev is there */
Joe Perches90a3b892014-06-06 14:37:57 -07003670static struct ctl_table cdrom_root_table[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003671 {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003672 .procname = "dev",
3673 .maxlen = 0,
3674 .mode = 0555,
3675 .child = cdrom_cdrom_table,
3676 },
Eric W. Biederman894d2492009-11-05 14:34:02 -08003677 { }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003678};
3679static struct ctl_table_header *cdrom_sysctl_header;
3680
3681static void cdrom_sysctl_register(void)
3682{
3683 static int initialized;
3684
3685 if (initialized == 1)
3686 return;
3687
Eric W. Biederman0b4d4142007-02-14 00:34:09 -08003688 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003689
3690 /* set the defaults */
3691 cdrom_sysctl_settings.autoclose = autoclose;
3692 cdrom_sysctl_settings.autoeject = autoeject;
3693 cdrom_sysctl_settings.debug = debug;
3694 cdrom_sysctl_settings.lock = lockdoor;
3695 cdrom_sysctl_settings.check = check_media_type;
3696
3697 initialized = 1;
3698}
3699
3700static void cdrom_sysctl_unregister(void)
3701{
3702 if (cdrom_sysctl_header)
3703 unregister_sysctl_table(cdrom_sysctl_header);
3704}
3705
Akinobu Mita17672cf2008-03-26 12:08:59 +01003706#else /* CONFIG_SYSCTL */
3707
3708static void cdrom_sysctl_register(void)
3709{
3710}
3711
3712static void cdrom_sysctl_unregister(void)
3713{
3714}
3715
Linus Torvalds1da177e2005-04-16 15:20:36 -07003716#endif /* CONFIG_SYSCTL */
3717
3718static int __init cdrom_init(void)
3719{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003720 cdrom_sysctl_register();
Akinobu Mita17672cf2008-03-26 12:08:59 +01003721
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722 return 0;
3723}
3724
3725static void __exit cdrom_exit(void)
3726{
Joe Perchese597cd02010-07-01 08:24:32 +02003727 pr_info("Uniform CD-ROM driver unloaded\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003728 cdrom_sysctl_unregister();
Linus Torvalds1da177e2005-04-16 15:20:36 -07003729}
3730
3731module_init(cdrom_init);
3732module_exit(cdrom_exit);
3733MODULE_LICENSE("GPL");