1 /* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
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. ;-)
18 ----------------------------------
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!
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?
32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
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.
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.
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
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
57 -- Simplified some complex logic so that the source code is easier to read.
59 -- Other stuff I probably forgot to mention (lots of changes).
61 2.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
64 2.12 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.
70 2.13 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.
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.
85 2.50 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
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.
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
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
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.
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>.
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
121 -- proc info didn't mask against capabilities mask.
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,
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.
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
144 -- Fix up ioctl handling so the device specific ones actually get
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
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.
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.
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.
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
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.
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.
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
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
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.
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
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.
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
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
243 -------------------------------------------------------------------------*/
245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
247 #define REVISION "Revision: 3.20"
248 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
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
257 #define CD_CLOSE 0x10
258 #define CD_COUNT_TRACKS 0x20
259 #define CD_CHANGER 0x40
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) */
268 #include <linux/atomic.h>
269 #include <linux/module.h>
270 #include <linux/fs.h>
271 #include <linux/major.h>
272 #include <linux/types.h>
273 #include <linux/errno.h>
274 #include <linux/kernel.h>
275 #include <linux/mm.h>
276 #include <linux/slab.h>
277 #include <linux/cdrom.h>
278 #include <linux/sysctl.h>
279 #include <linux/proc_fs.h>
280 #include <linux/blkpg.h>
281 #include <linux/init.h>
282 #include <linux/fcntl.h>
283 #include <linux/blkdev.h>
284 #include <linux/times.h>
285 #include <linux/uaccess.h>
286 #include <scsi/scsi_request.h>
288 /* used to tell the module to turn on full debugging messages */
290 /* default compatibility mode */
291 static bool autoclose=1;
292 static bool autoeject;
293 static bool lockdoor = 1;
294 /* will we ever get to use this... sigh. */
295 static bool check_media_type;
296 /* automatically restart mrw format */
297 static bool mrw_format_restart = 1;
298 module_param(debug, bool, 0);
299 module_param(autoclose, bool, 0);
300 module_param(autoeject, bool, 0);
301 module_param(lockdoor, bool, 0);
302 module_param(check_media_type, bool, 0);
303 module_param(mrw_format_restart, bool, 0);
305 static DEFINE_MUTEX(cdrom_mutex);
307 static const char *mrw_format_status[] = {
314 static const char *mrw_address_space[] = { "DMA", "GAA" };
316 #if (ERRLOGMASK != CD_NOTHING)
317 #define cd_dbg(type, fmt, ...) \
319 if ((ERRLOGMASK & type) || debug == 1) \
320 pr_debug(fmt, ##__VA_ARGS__); \
323 #define cd_dbg(type, fmt, ...) \
325 if (0 && (ERRLOGMASK & type) || debug == 1) \
326 pr_debug(fmt, ##__VA_ARGS__); \
330 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
331 a lot of places. This macro makes the code more clear. */
332 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
335 * Another popular OS uses 7 seconds as the hard timeout for default
336 * commands, so it is a good choice for us as well.
338 #define CDROM_DEF_TIMEOUT (7 * HZ)
340 /* Not-exported routines. */
342 static void cdrom_sysctl_register(void);
344 static LIST_HEAD(cdrom_list);
346 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
347 struct packet_command *cgc)
350 cgc->sense->sense_key = 0x05;
351 cgc->sense->asc = 0x20;
352 cgc->sense->ascq = 0x00;
358 EXPORT_SYMBOL(cdrom_dummy_generic_packet);
360 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
362 struct packet_command cgc;
364 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
365 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
367 cgc.timeout = 5 * 60 * HZ;
369 return cdi->ops->generic_packet(cdi, &cgc);
372 /* requires CD R/RW */
373 static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
374 disc_information *di)
376 const struct cdrom_device_ops *cdo = cdi->ops;
377 struct packet_command cgc;
380 /* set up command and get the disc info */
381 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
382 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
383 cgc.cmd[8] = cgc.buflen = 2;
386 ret = cdo->generic_packet(cdi, &cgc);
390 /* not all drives have the same disc_info length, so requeue
391 * packet with the length the drive tells us it can supply
393 buflen = be16_to_cpu(di->disc_information_length) +
394 sizeof(di->disc_information_length);
396 if (buflen > sizeof(disc_information))
397 buflen = sizeof(disc_information);
399 cgc.cmd[8] = cgc.buflen = buflen;
400 ret = cdo->generic_packet(cdi, &cgc);
404 /* return actual fill size */
408 /* This macro makes sure we don't have to check on cdrom_device_ops
409 * existence in the run-time routines below. Change_capability is a
410 * hack to have the capability flags defined const, while we can still
411 * change it here without gcc complaining at every line.
413 #define ENSURE(cdo, call, bits) \
415 if (cdo->call == NULL) \
416 WARN_ON_ONCE((cdo)->capability & (bits)); \
420 * the first prototypes used 0x2c as the page code for the mrw mode page,
421 * subsequently this was changed to 0x03. probe the one used by this drive
423 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
425 struct packet_command cgc;
428 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
433 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
434 cdi->mrw_mode_page = MRW_MODE_PC;
436 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
437 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
444 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
446 struct packet_command cgc;
447 struct mrw_feature_desc *mfd;
448 unsigned char buffer[16];
453 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
455 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
456 cgc.cmd[3] = CDF_MRW;
457 cgc.cmd[8] = sizeof(buffer);
460 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
463 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
464 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
468 if ((ret = cdrom_mrw_probe_pc(cdi))) {
476 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
478 struct packet_command cgc;
479 unsigned char buffer[12];
482 pr_info("%sstarting format\n", cont ? "Re" : "");
485 * FmtData bit set (bit 4), format type is 1
487 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
488 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
489 cgc.cmd[1] = (1 << 4) | 1;
491 cgc.timeout = 5 * 60 * HZ;
494 * 4 byte format list header, 8 byte format list descriptor
507 buffer[8] = 0x24 << 2;
510 ret = cdi->ops->generic_packet(cdi, &cgc);
512 pr_info("bgformat failed\n");
517 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
519 struct packet_command cgc;
521 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
522 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
525 * Session = 1, Track = 0
527 cgc.cmd[1] = !!immed;
530 cgc.timeout = 5 * 60 * HZ;
532 return cdi->ops->generic_packet(cdi, &cgc);
535 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
540 ret = cdrom_get_disc_info(cdi, &di);
541 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
545 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
546 pr_info("issuing MRW background format suspend\n");
547 ret = cdrom_mrw_bgformat_susp(cdi, 0);
550 if (!ret && cdi->media_written)
551 ret = cdrom_flush_cache(cdi);
556 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
558 struct packet_command cgc;
559 struct mode_page_header *mph;
561 int ret, offset, size;
563 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
566 cgc.buflen = sizeof(buffer);
568 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
572 mph = (struct mode_page_header *)buffer;
573 offset = be16_to_cpu(mph->desc_length);
574 size = be16_to_cpu(mph->mode_data_length) + 2;
576 buffer[offset + 3] = space;
579 ret = cdrom_mode_select(cdi, &cgc);
583 pr_info("%s: mrw address space %s selected\n",
584 cdi->name, mrw_address_space[space]);
588 int register_cdrom(struct cdrom_device_info *cdi)
590 static char banner_printed;
591 const struct cdrom_device_ops *cdo = cdi->ops;
593 cd_dbg(CD_OPEN, "entering register_cdrom\n");
595 if (cdo->open == NULL || cdo->release == NULL)
597 if (!banner_printed) {
598 pr_info("Uniform CD-ROM driver " REVISION "\n");
600 cdrom_sysctl_register();
603 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL && cdo->media_changed == NULL)
605 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
606 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(cdo, lock_door, CDC_LOCK);
608 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
609 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
610 ENSURE(cdo, get_mcn, CDC_MCN);
611 ENSURE(cdo, reset, CDC_RESET);
612 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
614 cdi->options = CDO_USE_FFLAGS;
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;
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
629 cdi->cdda_method = CDDA_BPC_FULL;
631 cdi->cdda_method = CDDA_OLD;
633 WARN_ON(!cdo->generic_packet);
635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
636 mutex_lock(&cdrom_mutex);
637 list_add(&cdi->list, &cdrom_list);
638 mutex_unlock(&cdrom_mutex);
643 void unregister_cdrom(struct cdrom_device_info *cdi)
645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
647 mutex_lock(&cdrom_mutex);
648 list_del(&cdi->list);
649 mutex_unlock(&cdrom_mutex);
654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657 int cdrom_get_media_event(struct cdrom_device_info *cdi,
658 struct media_event_desc *med)
660 struct packet_command cgc;
661 unsigned char buffer[8];
662 struct event_header *eh = (struct event_header *)buffer;
664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
666 cgc.cmd[1] = 1; /* IMMED */
667 cgc.cmd[4] = 1 << 4; /* media event */
668 cgc.cmd[8] = sizeof(buffer);
671 if (cdi->ops->generic_packet(cdi, &cgc))
674 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 if (eh->nea || eh->notification_class != 0x4)
680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
684 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
687 struct packet_command cgc;
691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
705 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
707 struct packet_command cgc;
709 __be16 *feature_code;
712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
716 cgc.cmd[8] = sizeof(buffer);
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
730 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
732 struct rwrt_feature_desc rfd;
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
746 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
759 * FIXME: check RO bit
761 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
763 int ret = cdrom_media_erasable(cdi);
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
775 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
781 * always reset to DMA lba space on open
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
784 pr_err("failed setting lba address space\n");
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
808 ret = cdrom_mrw_bgformat(cdi, 1);
813 static int mo_open_write(struct cdrom_device_info *cdi)
815 struct packet_command cgc;
819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 /* drive gave us no info, let the user go ahead */
839 return buffer[3] & 0x80;
842 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
844 struct rwrt_feature_desc rfd;
847 if ((ret = cdrom_has_defect_mgt(cdi)))
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 cd_dbg(CD_OPEN, "can open for random write\n");
859 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
861 struct packet_command cgc;
863 int ret, mmc3_profile;
865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
878 cdi->mmc3_profile = mmc3_profile;
881 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
886 case 0x43: /* BD-RE */
894 * returns 0 for ok to open write, non-0 to disallow
896 static int cdrom_open_write(struct cdrom_device_info *cdi)
898 int mrw, mrw_write, ram_write;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
905 if (CDROM_CAN(CDC_MO_DRIVE))
908 (void) cdrom_is_random_writable(cdi, &ram_write);
911 cdi->mask &= ~CDC_MRW;
913 cdi->mask |= CDC_MRW;
916 cdi->mask &= ~CDC_MRW_W;
918 cdi->mask |= CDC_MRW_W;
921 cdi->mask &= ~CDC_RAM;
923 cdi->mask |= CDC_RAM;
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
940 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
942 struct packet_command cgc;
944 if (cdi->mmc3_profile != 0x1a) {
945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
949 if (!cdi->media_written) {
950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
959 cdi->ops->generic_packet(cdi, &cgc);
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
965 cdi->ops->generic_packet(cdi, &cgc);
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
974 cdi->media_written = 0;
977 static int cdrom_close_write(struct cdrom_device_info *cdi)
980 return cdrom_flush_cache(cdi);
986 /* badly broken, I know. Is due for a fixup anytime. */
987 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
989 struct cdrom_tochdr header;
990 struct cdrom_tocentry entry;
997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
999 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1000 tracks->error = CDS_NO_INFO;
1004 /* Grab the TOC header so we can see how many tracks there are */
1005 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1007 if (ret == -ENOMEDIUM)
1008 tracks->error = CDS_NO_DISC;
1010 tracks->error = CDS_NO_INFO;
1013 /* check what type of tracks are on this disc */
1014 entry.cdte_format = CDROM_MSF;
1015 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1016 entry.cdte_track = i;
1017 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1018 tracks->error = CDS_NO_INFO;
1021 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1022 if (entry.cdte_format == 0x10)
1024 else if (entry.cdte_format == 0x20)
1031 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1032 i, entry.cdte_format, entry.cdte_ctrl);
1034 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1035 header.cdth_trk1, tracks->audio, tracks->data,
1036 tracks->cdi, tracks->xa);
1040 int open_for_data(struct cdrom_device_info *cdi)
1043 const struct cdrom_device_ops *cdo = cdi->ops;
1045 cd_dbg(CD_OPEN, "entering open_for_data\n");
1046 /* Check if the driver can report drive status. If it can, we
1047 can do clever things. If it can't, well, we at least tried! */
1048 if (cdo->drive_status != NULL) {
1049 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1050 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1051 if (ret == CDS_TRAY_OPEN) {
1052 cd_dbg(CD_OPEN, "the tray is open...\n");
1053 /* can/may i close it? */
1054 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1055 cdi->options & CDO_AUTO_CLOSE) {
1056 cd_dbg(CD_OPEN, "trying to close the tray\n");
1057 ret=cdo->tray_move(cdi,0);
1059 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1060 /* Ignore the error from the low
1061 level driver. We don't care why it
1062 couldn't close the tray. We only care
1063 that there is no disc in the drive,
1064 since that is the _REAL_ problem here.*/
1066 goto clean_up_and_return;
1069 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1071 goto clean_up_and_return;
1073 /* Ok, the door should be closed now.. Check again */
1074 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1075 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1076 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1077 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1079 goto clean_up_and_return;
1081 cd_dbg(CD_OPEN, "the tray is now closed\n");
1083 /* the door should be closed now, check for the disc */
1084 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1085 if (ret!=CDS_DISC_OK) {
1087 goto clean_up_and_return;
1090 cdrom_count_tracks(cdi, &tracks);
1091 if (tracks.error == CDS_NO_DISC) {
1092 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1094 goto clean_up_and_return;
1096 /* CD-Players which don't use O_NONBLOCK, workman
1097 * for example, need bit CDO_CHECK_TYPE cleared! */
1098 if (tracks.data==0) {
1099 if (cdi->options & CDO_CHECK_TYPE) {
1100 /* give people a warning shot, now that CDO_CHECK_TYPE
1101 is the default case! */
1102 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1103 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1104 (unsigned int)task_pid_nr(current));
1106 goto clean_up_and_return;
1109 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1113 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1115 /* all seems well, we can open the device */
1116 ret = cdo->open(cdi, 0); /* open for data */
1117 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1118 /* After all this careful checking, we shouldn't have problems
1119 opening the device, but we don't want the device locked if
1120 this somehow fails... */
1122 cd_dbg(CD_OPEN, "open device failed\n");
1123 goto clean_up_and_return;
1125 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1126 cdo->lock_door(cdi, 1);
1127 cd_dbg(CD_OPEN, "door locked\n");
1129 cd_dbg(CD_OPEN, "device opened successfully\n");
1132 /* Something failed. Try to unlock the drive, because some drivers
1133 (notably ide-cd) lock the drive after every command. This produced
1134 a nasty bug where after mount failed, the drive would remain locked!
1135 This ensures that the drive gets unlocked after a mount fails. This
1136 is a goto to avoid bloating the driver with redundant code. */
1137 clean_up_and_return:
1138 cd_dbg(CD_OPEN, "open failed\n");
1139 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1140 cdo->lock_door(cdi, 0);
1141 cd_dbg(CD_OPEN, "door unlocked\n");
1146 /* We use the open-option O_NONBLOCK to indicate that the
1147 * purpose of opening is only for subsequent ioctl() calls; no device
1148 * integrity checks are performed.
1150 * We hope that all cd-player programs will adopt this convention. It
1151 * is in their own interest: device control becomes a lot easier
1154 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1159 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1161 /* if this was a O_NONBLOCK open and we should honor the flags,
1162 * do a quick open without drive/disc integrity checks. */
1164 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1165 ret = cdi->ops->open(cdi, 1);
1167 ret = open_for_data(cdi);
1170 if (CDROM_CAN(CDC_GENERIC_PACKET))
1171 cdrom_mmc3_profile(cdi);
1172 if (mode & FMODE_WRITE) {
1174 if (cdrom_open_write(cdi))
1176 if (!CDROM_CAN(CDC_RAM))
1179 cdi->media_written = 0;
1186 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1187 cdi->name, cdi->use_count);
1190 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1191 cdi->ops->lock_door(cdi, 0);
1192 cd_dbg(CD_OPEN, "door unlocked\n");
1194 cdi->ops->release(cdi);
1200 /* This code is similar to that in open_for_data. The routine is called
1201 whenever an audio play operation is requested.
1203 static int check_for_audio_disc(struct cdrom_device_info *cdi,
1204 const struct cdrom_device_ops *cdo)
1208 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1209 if (!(cdi->options & CDO_CHECK_TYPE))
1211 if (cdo->drive_status != NULL) {
1212 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1213 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1214 if (ret == CDS_TRAY_OPEN) {
1215 cd_dbg(CD_OPEN, "the tray is open...\n");
1216 /* can/may i close it? */
1217 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1218 cdi->options & CDO_AUTO_CLOSE) {
1219 cd_dbg(CD_OPEN, "trying to close the tray\n");
1220 ret=cdo->tray_move(cdi,0);
1222 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1223 /* Ignore the error from the low
1224 level driver. We don't care why it
1225 couldn't close the tray. We only care
1226 that there is no disc in the drive,
1227 since that is the _REAL_ problem here.*/
1231 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1234 /* Ok, the door should be closed now.. Check again */
1235 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1236 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1237 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1240 if (ret!=CDS_DISC_OK) {
1241 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1244 cd_dbg(CD_OPEN, "the tray is now closed\n");
1247 cdrom_count_tracks(cdi, &tracks);
1249 return(tracks.error);
1251 if (tracks.audio==0)
1252 return -EMEDIUMTYPE;
1257 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1259 const struct cdrom_device_ops *cdo = cdi->ops;
1260 int opened_for_data;
1262 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1264 if (cdi->use_count > 0)
1267 if (cdi->use_count == 0) {
1268 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1270 cdrom_dvd_rw_close_write(cdi);
1272 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1273 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1274 cdo->lock_door(cdi, 0);
1278 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1279 !(mode & FMODE_NDELAY);
1282 * flush cache on last write release
1284 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1285 cdrom_close_write(cdi);
1288 if (cdi->use_count == 0) { /* last process that closes dev*/
1289 if (opened_for_data &&
1290 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1291 cdo->tray_move(cdi, 1);
1295 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1296 struct cdrom_changer_info *buf)
1298 struct packet_command cgc;
1299 const struct cdrom_device_ops *cdo = cdi->ops;
1303 * Sanyo changer isn't spec compliant (doesn't use regular change
1304 * LOAD_UNLOAD command, and it doesn't implement the mech status
1307 if (cdi->sanyo_slot) {
1308 buf->hdr.nslots = 3;
1309 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1310 for (length = 0; length < 3; length++) {
1311 buf->slots[length].disc_present = 1;
1312 buf->slots[length].change = 0;
1317 length = sizeof(struct cdrom_mechstat_header) +
1318 cdi->capacity * sizeof(struct cdrom_slot);
1320 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1321 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1322 cgc.cmd[8] = (length >> 8) & 0xff;
1323 cgc.cmd[9] = length & 0xff;
1324 return cdo->generic_packet(cdi, &cgc);
1327 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1329 struct cdrom_changer_info *info;
1332 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1333 if (cdi->sanyo_slot)
1336 info = kmalloc(sizeof(*info), GFP_KERNEL);
1340 if ((ret = cdrom_read_mech_status(cdi, info)))
1343 if (info->slots[slot].disc_present)
1353 /* Return the number of slots for an ATAPI/SCSI cdrom,
1354 * return 1 if not a changer.
1356 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1360 struct cdrom_changer_info *info;
1362 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1363 /* cdrom_read_mech_status requires a valid value for capacity: */
1366 info = kmalloc(sizeof(*info), GFP_KERNEL);
1370 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1371 nslots = info->hdr.nslots;
1378 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1379 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1381 struct packet_command cgc;
1383 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1384 if (cdi->sanyo_slot && slot < 0)
1387 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1388 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1389 cgc.cmd[4] = 2 + (slot >= 0);
1391 cgc.timeout = 60 * HZ;
1393 /* The Sanyo 3 CD changer uses byte 7 of the
1394 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1395 using the GPCMD_LOAD_UNLOAD opcode. */
1396 if (cdi->sanyo_slot && -1 < slot) {
1397 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1399 cgc.cmd[4] = cgc.cmd[8] = 0;
1400 cdi->sanyo_slot = slot ? slot : 3;
1403 return cdi->ops->generic_packet(cdi, &cgc);
1406 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1408 struct cdrom_changer_info *info;
1412 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1413 if (!CDROM_CAN(CDC_SELECT_DISC))
1414 return -EDRIVE_CANT_DO_THIS;
1416 if (cdi->ops->check_events)
1417 cdi->ops->check_events(cdi, 0, slot);
1419 cdi->ops->media_changed(cdi, slot);
1421 if (slot == CDSL_NONE) {
1422 /* set media changed bits, on both queues */
1423 cdi->mc_flags = 0x3;
1424 return cdrom_load_unload(cdi, -1);
1427 info = kmalloc(sizeof(*info), GFP_KERNEL);
1431 if ((ret = cdrom_read_mech_status(cdi, info))) {
1436 curslot = info->hdr.curslot;
1439 if (cdi->use_count > 1 || cdi->keeplocked) {
1440 if (slot == CDSL_CURRENT) {
1447 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1448 which is useful if it had been previously unloaded.
1449 Whether it can or not, it returns the current slot.
1450 Similarly, if slot happens to be the current one, we still
1452 if (slot == CDSL_CURRENT)
1455 /* set media changed bits on both queues */
1456 cdi->mc_flags = 0x3;
1457 if ((ret = cdrom_load_unload(cdi, slot)))
1464 * As cdrom implements an extra ioctl consumer for media changed
1465 * event, it needs to buffer ->check_events() output, such that event
1466 * is not lost for both the usual VFS and ioctl paths.
1467 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1470 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1471 * called in parallel and buffering fields are accessed without any
1472 * exclusion. The original media_changed code had the same problem.
1473 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1474 * and remove this cruft altogether. It doesn't have much usefulness
1477 static void cdrom_update_events(struct cdrom_device_info *cdi,
1478 unsigned int clearing)
1480 unsigned int events;
1482 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1483 cdi->vfs_events |= events;
1484 cdi->ioctl_events |= events;
1487 unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1488 unsigned int clearing)
1490 unsigned int events;
1492 cdrom_update_events(cdi, clearing);
1493 events = cdi->vfs_events;
1494 cdi->vfs_events = 0;
1497 EXPORT_SYMBOL(cdrom_check_events);
1499 /* We want to make media_changed accessible to the user through an
1500 * ioctl. The main problem now is that we must double-buffer the
1501 * low-level implementation, to assure that the VFS and the user both
1502 * see a medium change once.
1506 int media_changed(struct cdrom_device_info *cdi, int queue)
1508 unsigned int mask = (1 << (queue & 1));
1509 int ret = !!(cdi->mc_flags & mask);
1512 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1515 /* changed since last call? */
1516 if (cdi->ops->check_events) {
1517 BUG_ON(!queue); /* shouldn't be called from VFS path */
1518 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1519 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1520 cdi->ioctl_events = 0;
1522 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1525 cdi->mc_flags = 0x3; /* set bit on both queues */
1527 cdi->media_written = 0;
1530 cdi->mc_flags &= ~mask; /* clear bit */
1534 int cdrom_media_changed(struct cdrom_device_info *cdi)
1536 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1537 * Returning "0" is always safe (media hasn't been changed). Do that
1538 * if the low-level cdrom driver dosn't support media changed. */
1539 if (cdi == NULL || cdi->ops->media_changed == NULL)
1541 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1543 return media_changed(cdi, 0);
1546 /* Requests to the low-level drivers will /always/ be done in the
1547 following format convention:
1549 CDROM_LBA: all data-related requests.
1550 CDROM_MSF: all audio-related requests.
1552 However, a low-level implementation is allowed to refuse this
1553 request, and return information in its own favorite format.
1555 It doesn't make sense /at all/ to ask for a play_audio in LBA
1556 format, or ask for multi-session info in MSF format. However, for
1557 backward compatibility these format requests will be satisfied, but
1558 the requests to the low-level drivers will be sanitized in the more
1559 meaningful format indicated above.
1563 void sanitize_format(union cdrom_addr *addr,
1564 u_char * curr, u_char requested)
1566 if (*curr == requested)
1567 return; /* nothing to be done! */
1568 if (requested == CDROM_LBA) {
1569 addr->lba = (int) addr->msf.frame +
1570 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1571 } else { /* CDROM_MSF */
1572 int lba = addr->lba;
1573 addr->msf.frame = lba % 75;
1576 addr->msf.second = lba % 60;
1577 addr->msf.minute = lba / 60;
1582 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1585 memset(cgc, 0, sizeof(struct packet_command));
1587 memset(buf, 0, len);
1588 cgc->buffer = (char *) buf;
1590 cgc->data_direction = type;
1591 cgc->timeout = CDROM_DEF_TIMEOUT;
1596 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1597 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1599 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1601 cgc->cmd[0] = GPCMD_REPORT_KEY;
1602 cgc->cmd[10] = type | (agid << 6);
1604 case 0: case 8: case 5: {
1617 cgc->cmd[9] = cgc->buflen;
1618 cgc->data_direction = CGC_DATA_READ;
1621 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1623 cgc->cmd[0] = GPCMD_SEND_KEY;
1624 cgc->cmd[10] = type | (agid << 6);
1639 cgc->cmd[9] = cgc->buflen;
1640 cgc->data_direction = CGC_DATA_WRITE;
1643 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1647 struct packet_command cgc;
1648 const struct cdrom_device_ops *cdo = cdi->ops;
1649 rpc_state_t rpc_state;
1651 memset(buf, 0, sizeof(buf));
1652 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1656 case DVD_LU_SEND_AGID:
1657 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1659 setup_report_key(&cgc, ai->lsa.agid, 0);
1661 if ((ret = cdo->generic_packet(cdi, &cgc)))
1664 ai->lsa.agid = buf[7] >> 6;
1665 /* Returning data, let host change state */
1668 case DVD_LU_SEND_KEY1:
1669 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1670 setup_report_key(&cgc, ai->lsk.agid, 2);
1672 if ((ret = cdo->generic_packet(cdi, &cgc)))
1675 copy_key(ai->lsk.key, &buf[4]);
1676 /* Returning data, let host change state */
1679 case DVD_LU_SEND_CHALLENGE:
1680 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1681 setup_report_key(&cgc, ai->lsc.agid, 1);
1683 if ((ret = cdo->generic_packet(cdi, &cgc)))
1686 copy_chal(ai->lsc.chal, &buf[4]);
1687 /* Returning data, let host change state */
1691 case DVD_LU_SEND_TITLE_KEY:
1692 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1694 setup_report_key(&cgc, ai->lstk.agid, 4);
1695 cgc.cmd[5] = ai->lstk.lba;
1696 cgc.cmd[4] = ai->lstk.lba >> 8;
1697 cgc.cmd[3] = ai->lstk.lba >> 16;
1698 cgc.cmd[2] = ai->lstk.lba >> 24;
1700 if ((ret = cdo->generic_packet(cdi, &cgc)))
1703 ai->lstk.cpm = (buf[4] >> 7) & 1;
1704 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1705 ai->lstk.cgms = (buf[4] >> 4) & 3;
1706 copy_key(ai->lstk.title_key, &buf[5]);
1707 /* Returning data, let host change state */
1710 case DVD_LU_SEND_ASF:
1711 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1712 setup_report_key(&cgc, ai->lsasf.agid, 5);
1714 if ((ret = cdo->generic_packet(cdi, &cgc)))
1717 ai->lsasf.asf = buf[7] & 1;
1720 /* LU data receive (LU changes state) */
1721 case DVD_HOST_SEND_CHALLENGE:
1722 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1723 setup_send_key(&cgc, ai->hsc.agid, 1);
1725 copy_chal(&buf[4], ai->hsc.chal);
1727 if ((ret = cdo->generic_packet(cdi, &cgc)))
1730 ai->type = DVD_LU_SEND_KEY1;
1733 case DVD_HOST_SEND_KEY2:
1734 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1735 setup_send_key(&cgc, ai->hsk.agid, 3);
1737 copy_key(&buf[4], ai->hsk.key);
1739 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1740 ai->type = DVD_AUTH_FAILURE;
1743 ai->type = DVD_AUTH_ESTABLISHED;
1747 case DVD_INVALIDATE_AGID:
1749 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1750 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1751 if ((ret = cdo->generic_packet(cdi, &cgc)))
1755 /* Get region settings */
1756 case DVD_LU_SEND_RPC_STATE:
1757 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1758 setup_report_key(&cgc, 0, 8);
1759 memset(&rpc_state, 0, sizeof(rpc_state_t));
1760 cgc.buffer = (char *) &rpc_state;
1762 if ((ret = cdo->generic_packet(cdi, &cgc)))
1765 ai->lrpcs.type = rpc_state.type_code;
1766 ai->lrpcs.vra = rpc_state.vra;
1767 ai->lrpcs.ucca = rpc_state.ucca;
1768 ai->lrpcs.region_mask = rpc_state.region_mask;
1769 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1772 /* Set region settings */
1773 case DVD_HOST_SEND_RPC_STATE:
1774 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1775 setup_send_key(&cgc, 0, 6);
1777 buf[4] = ai->hrpcs.pdrc;
1779 if ((ret = cdo->generic_packet(cdi, &cgc)))
1784 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1791 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1792 struct packet_command *cgc)
1794 unsigned char buf[21], *base;
1795 struct dvd_layer *layer;
1796 const struct cdrom_device_ops *cdo = cdi->ops;
1797 int ret, layer_num = s->physical.layer_num;
1799 if (layer_num >= DVD_LAYERS)
1802 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1803 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1804 cgc->cmd[6] = layer_num;
1805 cgc->cmd[7] = s->type;
1806 cgc->cmd[9] = cgc->buflen & 0xff;
1809 * refrain from reporting errors on non-existing layers (mainly)
1813 ret = cdo->generic_packet(cdi, cgc);
1818 layer = &s->physical.layer[layer_num];
1821 * place the data... really ugly, but at least we won't have to
1822 * worry about endianess in userspace.
1824 memset(layer, 0, sizeof(*layer));
1825 layer->book_version = base[0] & 0xf;
1826 layer->book_type = base[0] >> 4;
1827 layer->min_rate = base[1] & 0xf;
1828 layer->disc_size = base[1] >> 4;
1829 layer->layer_type = base[2] & 0xf;
1830 layer->track_path = (base[2] >> 4) & 1;
1831 layer->nlayers = (base[2] >> 5) & 3;
1832 layer->track_density = base[3] & 0xf;
1833 layer->linear_density = base[3] >> 4;
1834 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1835 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1836 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1837 layer->bca = base[16] >> 7;
1842 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1843 struct packet_command *cgc)
1847 const struct cdrom_device_ops *cdo = cdi->ops;
1849 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1850 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1851 cgc->cmd[6] = s->copyright.layer_num;
1852 cgc->cmd[7] = s->type;
1853 cgc->cmd[8] = cgc->buflen >> 8;
1854 cgc->cmd[9] = cgc->buflen & 0xff;
1856 ret = cdo->generic_packet(cdi, cgc);
1860 s->copyright.cpst = buf[4];
1861 s->copyright.rmi = buf[5];
1866 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1867 struct packet_command *cgc)
1871 const struct cdrom_device_ops *cdo = cdi->ops;
1873 size = sizeof(s->disckey.value) + 4;
1875 buf = kmalloc(size, GFP_KERNEL);
1879 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1880 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1881 cgc->cmd[7] = s->type;
1882 cgc->cmd[8] = size >> 8;
1883 cgc->cmd[9] = size & 0xff;
1884 cgc->cmd[10] = s->disckey.agid << 6;
1886 ret = cdo->generic_packet(cdi, cgc);
1888 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1894 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1895 struct packet_command *cgc)
1897 int ret, size = 4 + 188;
1899 const struct cdrom_device_ops *cdo = cdi->ops;
1901 buf = kmalloc(size, GFP_KERNEL);
1905 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1906 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1907 cgc->cmd[7] = s->type;
1908 cgc->cmd[9] = cgc->buflen & 0xff;
1910 ret = cdo->generic_packet(cdi, cgc);
1914 s->bca.len = buf[0] << 8 | buf[1];
1915 if (s->bca.len < 12 || s->bca.len > 188) {
1916 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1921 memcpy(s->bca.value, &buf[4], s->bca.len);
1928 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1929 struct packet_command *cgc)
1933 const struct cdrom_device_ops *cdo = cdi->ops;
1935 size = sizeof(s->manufact.value) + 4;
1937 buf = kmalloc(size, GFP_KERNEL);
1941 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1942 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1943 cgc->cmd[7] = s->type;
1944 cgc->cmd[8] = size >> 8;
1945 cgc->cmd[9] = size & 0xff;
1947 ret = cdo->generic_packet(cdi, cgc);
1951 s->manufact.len = buf[0] << 8 | buf[1];
1952 if (s->manufact.len < 0) {
1953 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1957 if (s->manufact.len > 2048) {
1958 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1960 s->manufact.len = 2048;
1962 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1970 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1971 struct packet_command *cgc)
1974 case DVD_STRUCT_PHYSICAL:
1975 return dvd_read_physical(cdi, s, cgc);
1977 case DVD_STRUCT_COPYRIGHT:
1978 return dvd_read_copyright(cdi, s, cgc);
1980 case DVD_STRUCT_DISCKEY:
1981 return dvd_read_disckey(cdi, s, cgc);
1983 case DVD_STRUCT_BCA:
1984 return dvd_read_bca(cdi, s, cgc);
1986 case DVD_STRUCT_MANUFACT:
1987 return dvd_read_manufact(cdi, s, cgc);
1990 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1996 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1997 struct packet_command *cgc,
1998 int page_code, int page_control)
2000 const struct cdrom_device_ops *cdo = cdi->ops;
2002 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2004 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2005 cgc->cmd[2] = page_code | (page_control << 6);
2006 cgc->cmd[7] = cgc->buflen >> 8;
2007 cgc->cmd[8] = cgc->buflen & 0xff;
2008 cgc->data_direction = CGC_DATA_READ;
2009 return cdo->generic_packet(cdi, cgc);
2012 int cdrom_mode_select(struct cdrom_device_info *cdi,
2013 struct packet_command *cgc)
2015 const struct cdrom_device_ops *cdo = cdi->ops;
2017 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2018 memset(cgc->buffer, 0, 2);
2019 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2020 cgc->cmd[1] = 0x10; /* PF */
2021 cgc->cmd[7] = cgc->buflen >> 8;
2022 cgc->cmd[8] = cgc->buflen & 0xff;
2023 cgc->data_direction = CGC_DATA_WRITE;
2024 return cdo->generic_packet(cdi, cgc);
2027 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2028 struct cdrom_subchnl *subchnl, int mcn)
2030 const struct cdrom_device_ops *cdo = cdi->ops;
2031 struct packet_command cgc;
2035 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2036 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2037 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2038 cgc.cmd[2] = 0x40; /* request subQ data */
2039 cgc.cmd[3] = mcn ? 2 : 1;
2042 if ((ret = cdo->generic_packet(cdi, &cgc)))
2045 subchnl->cdsc_audiostatus = cgc.buffer[1];
2046 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2047 subchnl->cdsc_trk = cgc.buffer[6];
2048 subchnl->cdsc_ind = cgc.buffer[7];
2050 if (subchnl->cdsc_format == CDROM_LBA) {
2051 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2052 (cgc.buffer[9] << 16) |
2053 (cgc.buffer[10] << 8) |
2055 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2056 (cgc.buffer[13] << 16) |
2057 (cgc.buffer[14] << 8) |
2060 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2061 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2062 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2063 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2064 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2065 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2072 * Specific READ_10 interface
2074 static int cdrom_read_cd(struct cdrom_device_info *cdi,
2075 struct packet_command *cgc, int lba,
2076 int blocksize, int nblocks)
2078 const struct cdrom_device_ops *cdo = cdi->ops;
2080 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2081 cgc->cmd[0] = GPCMD_READ_10;
2082 cgc->cmd[2] = (lba >> 24) & 0xff;
2083 cgc->cmd[3] = (lba >> 16) & 0xff;
2084 cgc->cmd[4] = (lba >> 8) & 0xff;
2085 cgc->cmd[5] = lba & 0xff;
2086 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2087 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2088 cgc->cmd[8] = nblocks & 0xff;
2089 cgc->buflen = blocksize * nblocks;
2090 return cdo->generic_packet(cdi, cgc);
2093 /* very generic interface for reading the various types of blocks */
2094 static int cdrom_read_block(struct cdrom_device_info *cdi,
2095 struct packet_command *cgc,
2096 int lba, int nblocks, int format, int blksize)
2098 const struct cdrom_device_ops *cdo = cdi->ops;
2100 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2101 cgc->cmd[0] = GPCMD_READ_CD;
2102 /* expected sector size - cdda,mode1,etc. */
2103 cgc->cmd[1] = format << 2;
2104 /* starting address */
2105 cgc->cmd[2] = (lba >> 24) & 0xff;
2106 cgc->cmd[3] = (lba >> 16) & 0xff;
2107 cgc->cmd[4] = (lba >> 8) & 0xff;
2108 cgc->cmd[5] = lba & 0xff;
2109 /* number of blocks */
2110 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2111 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2112 cgc->cmd[8] = nblocks & 0xff;
2113 cgc->buflen = blksize * nblocks;
2115 /* set the header info returned */
2117 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2118 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2119 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2120 default : cgc->cmd[9] = 0x10;
2123 return cdo->generic_packet(cdi, cgc);
2126 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2127 int lba, int nframes)
2129 struct packet_command cgc;
2133 cdi->last_sense = 0;
2135 memset(&cgc, 0, sizeof(cgc));
2138 * start with will ra.nframes size, back down if alloc fails
2142 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2152 cgc.data_direction = CGC_DATA_READ;
2153 while (nframes > 0) {
2157 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2160 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2164 ubuf += CD_FRAMESIZE_RAW * nr;
2172 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2173 int lba, int nframes)
2175 struct request_queue *q = cdi->disk->queue;
2177 struct scsi_request *req;
2185 if (!blk_queue_scsi_passthrough(q)) {
2187 "Attempt read CDDA info through a non-SCSI queue\n");
2191 cdi->last_sense = 0;
2195 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2197 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2198 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2200 len = nr * CD_FRAMESIZE_RAW;
2202 rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
2209 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2211 blk_put_request(rq);
2215 req->cmd[0] = GPCMD_READ_CD;
2216 req->cmd[1] = 1 << 2;
2217 req->cmd[2] = (lba >> 24) & 0xff;
2218 req->cmd[3] = (lba >> 16) & 0xff;
2219 req->cmd[4] = (lba >> 8) & 0xff;
2220 req->cmd[5] = lba & 0xff;
2221 req->cmd[6] = (nr >> 16) & 0xff;
2222 req->cmd[7] = (nr >> 8) & 0xff;
2223 req->cmd[8] = nr & 0xff;
2227 rq->timeout = 60 * HZ;
2230 blk_execute_rq(q, cdi->disk, rq, 0);
2231 if (scsi_req(rq)->result) {
2232 struct request_sense *s = req->sense;
2234 cdi->last_sense = s->sense_key;
2237 if (blk_rq_unmap_user(bio))
2239 blk_put_request(rq);
2252 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2253 int lba, int nframes)
2257 if (cdi->cdda_method == CDDA_OLD)
2258 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2262 * for anything else than success and io error, we need to retry
2264 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2265 if (!ret || ret != -EIO)
2269 * I've seen drives get sense 4/8/3 udma crc errors on multi
2270 * frame dma, so drop to single frame dma if we need to
2272 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2273 pr_info("dropping to single frame dma\n");
2274 cdi->cdda_method = CDDA_BPC_SINGLE;
2279 * so we have an io error of some sort with multi frame dma. if the
2280 * condition wasn't a hardware error
2281 * problems, not for any error
2283 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2286 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2287 cdi->cdda_method = CDDA_OLD;
2288 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2291 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2294 struct cdrom_multisession ms_info;
2295 u8 requested_format;
2298 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2300 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2303 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2306 requested_format = ms_info.addr_format;
2307 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2309 ms_info.addr_format = CDROM_LBA;
2311 ret = cdi->ops->get_last_session(cdi, &ms_info);
2315 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2317 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2320 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2324 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2326 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2328 if (!CDROM_CAN(CDC_OPEN_TRAY))
2330 if (cdi->use_count != 1 || cdi->keeplocked)
2332 if (CDROM_CAN(CDC_LOCK)) {
2333 int ret = cdi->ops->lock_door(cdi, 0);
2338 return cdi->ops->tray_move(cdi, 1);
2341 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2343 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2345 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2347 return cdi->ops->tray_move(cdi, 0);
2350 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2353 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2355 if (!CDROM_CAN(CDC_OPEN_TRAY))
2357 if (cdi->keeplocked)
2360 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2362 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2366 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2369 struct cdrom_changer_info *info;
2372 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2374 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2377 /* cannot select disc or select current disc */
2378 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2379 return media_changed(cdi, 1);
2381 if (arg >= cdi->capacity)
2384 info = kmalloc(sizeof(*info), GFP_KERNEL);
2388 ret = cdrom_read_mech_status(cdi, info);
2390 ret = info->slots[arg].change;
2395 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2398 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2401 * Options need to be in sync with capability.
2402 * Too late for that, so we have to check each one separately.
2405 case CDO_USE_FFLAGS:
2406 case CDO_CHECK_TYPE:
2409 if (!CDROM_CAN(CDC_LOCK))
2413 return cdi->options;
2414 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2416 if (!CDROM_CAN(arg))
2419 cdi->options |= (int) arg;
2420 return cdi->options;
2423 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2426 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2428 cdi->options &= ~(int) arg;
2429 return cdi->options;
2432 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2435 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2437 if (!CDROM_CAN(CDC_SELECT_SPEED))
2439 return cdi->ops->select_speed(cdi, arg);
2442 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2445 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2447 if (!CDROM_CAN(CDC_SELECT_DISC))
2450 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2451 if (arg >= cdi->capacity)
2456 * ->select_disc is a hook to allow a driver-specific way of
2457 * seleting disc. However, since there is no equivalent hook for
2458 * cdrom_slot_status this may not actually be useful...
2460 if (cdi->ops->select_disc)
2461 return cdi->ops->select_disc(cdi, arg);
2463 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2464 return cdrom_select_disc(cdi, arg);
2467 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2468 struct block_device *bdev)
2470 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2472 if (!capable(CAP_SYS_ADMIN))
2474 if (!CDROM_CAN(CDC_RESET))
2476 invalidate_bdev(bdev);
2477 return cdi->ops->reset(cdi);
2480 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2483 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2485 if (!CDROM_CAN(CDC_LOCK))
2486 return -EDRIVE_CANT_DO_THIS;
2488 cdi->keeplocked = arg ? 1 : 0;
2491 * Don't unlock the door on multiple opens by default, but allow
2494 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2496 return cdi->ops->lock_door(cdi, arg);
2499 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2502 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2504 if (!capable(CAP_SYS_ADMIN))
2506 debug = arg ? 1 : 0;
2510 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2512 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2513 return (cdi->ops->capability & ~cdi->mask);
2517 * The following function is implemented, although very few audio
2518 * discs give Universal Product Code information, which should just be
2519 * the Medium Catalog Number on the box. Note, that the way the code
2520 * is written on the CD is /not/ uniform across all discs!
2522 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2525 struct cdrom_mcn mcn;
2528 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2530 if (!(cdi->ops->capability & CDC_MCN))
2532 ret = cdi->ops->get_mcn(cdi, &mcn);
2536 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2538 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2542 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2545 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2547 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2549 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2550 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2551 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2552 if (arg >= cdi->capacity)
2554 return cdrom_slot_status(cdi, arg);
2558 * Ok, this is where problems start. The current interface for the
2559 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2560 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2561 * is often the case, it is also very common for CDs to have some tracks
2562 * with data, and some tracks with audio. Just because I feel like it,
2563 * I declare the following to be the best way to cope. If the CD has ANY
2564 * data tracks on it, it will be returned as a data CD. If it has any XA
2565 * tracks, I will return it as that. Now I could simplify this interface
2566 * by combining these returns with the above, but this more clearly
2567 * demonstrates the problem with the current interface. Too bad this
2568 * wasn't designed to use bitmasks... -Erik
2570 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2571 * User level programmers might feel the ioctl is not very useful.
2574 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2578 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2580 cdrom_count_tracks(cdi, &tracks);
2582 return tracks.error;
2584 /* Policy mode on */
2585 if (tracks.audio > 0) {
2586 if (!tracks.data && !tracks.cdi && !tracks.xa)
2596 if (tracks.data > 0)
2598 /* Policy mode off */
2600 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2604 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2606 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2607 return cdi->capacity;
2610 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2613 struct cdrom_subchnl q;
2617 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2619 if (copy_from_user(&q, argp, sizeof(q)))
2622 requested = q.cdsc_format;
2623 if (requested != CDROM_MSF && requested != CDROM_LBA)
2625 q.cdsc_format = CDROM_MSF;
2627 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2631 back = q.cdsc_format; /* local copy */
2632 sanitize_format(&q.cdsc_absaddr, &back, requested);
2633 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2635 if (copy_to_user(argp, &q, sizeof(q)))
2637 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2641 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2644 struct cdrom_tochdr header;
2647 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2649 if (copy_from_user(&header, argp, sizeof(header)))
2652 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2656 if (copy_to_user(argp, &header, sizeof(header)))
2658 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2662 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2665 struct cdrom_tocentry entry;
2666 u8 requested_format;
2669 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2671 if (copy_from_user(&entry, argp, sizeof(entry)))
2674 requested_format = entry.cdte_format;
2675 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2677 /* make interface to low-level uniform */
2678 entry.cdte_format = CDROM_MSF;
2679 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2682 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2684 if (copy_to_user(argp, &entry, sizeof(entry)))
2686 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2690 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2693 struct cdrom_msf msf;
2695 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2697 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2699 if (copy_from_user(&msf, argp, sizeof(msf)))
2701 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2704 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2710 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2712 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2714 if (copy_from_user(&ti, argp, sizeof(ti)))
2717 ret = check_for_audio_disc(cdi, cdi->ops);
2720 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2722 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2725 struct cdrom_volctrl volume;
2727 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2729 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2731 if (copy_from_user(&volume, argp, sizeof(volume)))
2733 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2736 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2739 struct cdrom_volctrl volume;
2742 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2744 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2747 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2751 if (copy_to_user(argp, &volume, sizeof(volume)))
2756 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2761 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2763 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2765 ret = check_for_audio_disc(cdi, cdi->ops);
2768 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2772 * Required when we need to use READ_10 to issue other than 2048 block
2775 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2777 const struct cdrom_device_ops *cdo = cdi->ops;
2778 struct packet_command cgc;
2779 struct modesel_head mh;
2781 memset(&mh, 0, sizeof(mh));
2782 mh.block_desc_length = 0x08;
2783 mh.block_length_med = (size >> 8) & 0xff;
2784 mh.block_length_lo = size & 0xff;
2786 memset(&cgc, 0, sizeof(cgc));
2788 cgc.cmd[1] = 1 << 4;
2790 cgc.buflen = sizeof(mh);
2791 cgc.buffer = (char *) &mh;
2792 cgc.data_direction = CGC_DATA_WRITE;
2793 mh.block_desc_length = 0x08;
2794 mh.block_length_med = (size >> 8) & 0xff;
2795 mh.block_length_lo = size & 0xff;
2797 return cdo->generic_packet(cdi, &cgc);
2800 static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2801 __u16 track, __u8 type, track_information *ti)
2803 const struct cdrom_device_ops *cdo = cdi->ops;
2804 struct packet_command cgc;
2807 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2808 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2809 cgc.cmd[1] = type & 3;
2810 cgc.cmd[4] = (track & 0xff00) >> 8;
2811 cgc.cmd[5] = track & 0xff;
2815 ret = cdo->generic_packet(cdi, &cgc);
2819 buflen = be16_to_cpu(ti->track_information_length) +
2820 sizeof(ti->track_information_length);
2822 if (buflen > sizeof(track_information))
2823 buflen = sizeof(track_information);
2825 cgc.cmd[8] = cgc.buflen = buflen;
2826 ret = cdo->generic_packet(cdi, &cgc);
2830 /* return actual fill size */
2834 /* return the last written block on the CD-R media. this is for the udf
2836 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2838 struct cdrom_tocentry toc;
2839 disc_information di;
2840 track_information ti;
2842 int ret = -1, ti_size;
2844 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2847 ret = cdrom_get_disc_info(cdi, &di);
2848 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2849 + sizeof(di.last_track_lsb)))
2852 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2853 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2854 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2855 if (ti_size < (int)offsetof(typeof(ti), track_start))
2858 /* if this track is blank, try the previous. */
2860 if (last_track == 1)
2863 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2866 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2867 + sizeof(ti.track_size)))
2870 /* if last recorded field is valid, return it. */
2871 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2872 + sizeof(ti.last_rec_address))) {
2873 *last_written = be32_to_cpu(ti.last_rec_address);
2875 /* make it up instead */
2876 *last_written = be32_to_cpu(ti.track_start) +
2877 be32_to_cpu(ti.track_size);
2879 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2883 /* this is where we end up if the drive either can't do a
2884 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2885 it doesn't give enough information or fails. then we return
2886 the toc contents. */
2888 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2891 toc.cdte_format = CDROM_MSF;
2892 toc.cdte_track = CDROM_LEADOUT;
2893 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2895 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2896 *last_written = toc.cdte_addr.lba;
2900 /* return the next writable block. also for udf file system. */
2901 static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2902 long *next_writable)
2904 disc_information di;
2905 track_information ti;
2909 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2910 goto use_last_written;
2912 ret = cdrom_get_disc_info(cdi, &di);
2913 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2914 + sizeof(di.last_track_lsb))
2915 goto use_last_written;
2917 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2918 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2919 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2920 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2921 goto use_last_written;
2923 /* if this track is blank, try the previous. */
2925 if (last_track == 1)
2926 goto use_last_written;
2928 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2930 goto use_last_written;
2933 /* if next recordable address field is valid, use it. */
2934 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2935 + sizeof(ti.next_writable)) {
2936 *next_writable = be32_to_cpu(ti.next_writable);
2941 ret = cdrom_get_last_written(cdi, next_writable);
2946 *next_writable += 7;
2951 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2953 struct packet_command *cgc,
2956 struct request_sense sense;
2957 struct cdrom_msf msf;
2958 int blocksize = 0, format = 0, lba;
2963 blocksize = CD_FRAMESIZE_RAW;
2965 case CDROMREADMODE1:
2966 blocksize = CD_FRAMESIZE;
2969 case CDROMREADMODE2:
2970 blocksize = CD_FRAMESIZE_RAW0;
2973 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2975 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2976 /* FIXME: we need upper bound checking, too!! */
2980 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2981 if (cgc->buffer == NULL)
2984 memset(&sense, 0, sizeof(sense));
2985 cgc->sense = &sense;
2986 cgc->data_direction = CGC_DATA_READ;
2987 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2988 if (ret && sense.sense_key == 0x05 &&
2989 sense.asc == 0x20 &&
2990 sense.ascq == 0x00) {
2992 * SCSI-II devices are not required to support
2993 * READ_CD, so let's try switching block size
2995 /* FIXME: switch back again... */
2996 ret = cdrom_switch_blocksize(cdi, blocksize);
3000 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
3001 ret |= cdrom_switch_blocksize(cdi, blocksize);
3003 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3010 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3013 struct cdrom_read_audio ra;
3016 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3020 if (ra.addr_format == CDROM_MSF)
3021 lba = msf_to_lba(ra.addr.msf.minute,
3024 else if (ra.addr_format == CDROM_LBA)
3029 /* FIXME: we need upper bound checking, too!! */
3030 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3033 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3036 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3040 struct cdrom_subchnl q;
3041 u_char requested, back;
3042 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3044 requested = q.cdsc_format;
3045 if (!((requested == CDROM_MSF) ||
3046 (requested == CDROM_LBA)))
3049 ret = cdrom_read_subchannel(cdi, &q, 0);
3052 back = q.cdsc_format; /* local copy */
3053 sanitize_format(&q.cdsc_absaddr, &back, requested);
3054 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3055 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3057 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3061 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3063 struct packet_command *cgc)
3065 const struct cdrom_device_ops *cdo = cdi->ops;
3066 struct cdrom_msf msf;
3067 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3068 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3070 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3071 cgc->cmd[3] = msf.cdmsf_min0;
3072 cgc->cmd[4] = msf.cdmsf_sec0;
3073 cgc->cmd[5] = msf.cdmsf_frame0;
3074 cgc->cmd[6] = msf.cdmsf_min1;
3075 cgc->cmd[7] = msf.cdmsf_sec1;
3076 cgc->cmd[8] = msf.cdmsf_frame1;
3077 cgc->data_direction = CGC_DATA_NONE;
3078 return cdo->generic_packet(cdi, cgc);
3081 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3083 struct packet_command *cgc)
3085 const struct cdrom_device_ops *cdo = cdi->ops;
3086 struct cdrom_blk blk;
3087 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3088 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3090 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3091 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3092 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3093 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3094 cgc->cmd[5] = blk.from & 0xff;
3095 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3096 cgc->cmd[8] = blk.len & 0xff;
3097 cgc->data_direction = CGC_DATA_NONE;
3098 return cdo->generic_packet(cdi, cgc);
3101 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3103 struct packet_command *cgc,
3106 struct cdrom_volctrl volctrl;
3107 unsigned char buffer[32];
3108 char mask[sizeof(buffer)];
3109 unsigned short offset;
3112 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3114 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3118 cgc->buffer = buffer;
3120 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3124 /* originally the code depended on buffer[1] to determine
3125 how much data is available for transfer. buffer[1] is
3126 unfortunately ambigious and the only reliable way seem
3127 to be to simply skip over the block descriptor... */
3128 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3130 if (offset + 16 > sizeof(buffer))
3133 if (offset + 16 > cgc->buflen) {
3134 cgc->buflen = offset + 16;
3135 ret = cdrom_mode_sense(cdi, cgc,
3136 GPMODE_AUDIO_CTL_PAGE, 0);
3142 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3143 buffer[offset + 1] < 14)
3146 /* now we have the current volume settings. if it was only
3147 a CDROMVOLREAD, return these values */
3148 if (cmd == CDROMVOLREAD) {
3149 volctrl.channel0 = buffer[offset+9];
3150 volctrl.channel1 = buffer[offset+11];
3151 volctrl.channel2 = buffer[offset+13];
3152 volctrl.channel3 = buffer[offset+15];
3153 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3159 /* get the volume mask */
3161 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3165 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3166 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3167 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3168 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3171 cgc->buffer = buffer + offset - 8;
3172 memset(cgc->buffer, 0, 8);
3173 return cdrom_mode_select(cdi, cgc);
3176 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3177 struct packet_command *cgc,
3180 const struct cdrom_device_ops *cdo = cdi->ops;
3181 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3182 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3184 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3185 cgc->data_direction = CGC_DATA_NONE;
3186 return cdo->generic_packet(cdi, cgc);
3189 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3190 struct packet_command *cgc,
3193 const struct cdrom_device_ops *cdo = cdi->ops;
3194 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3195 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3196 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3197 cgc->data_direction = CGC_DATA_NONE;
3198 return cdo->generic_packet(cdi, cgc);
3201 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3203 struct packet_command *cgc)
3207 int size = sizeof(dvd_struct);
3209 if (!CDROM_CAN(CDC_DVD))
3212 s = memdup_user(arg, size);
3216 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3218 ret = dvd_read_struct(cdi, s, cgc);
3222 if (copy_to_user(arg, s, size))
3229 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3234 if (!CDROM_CAN(CDC_DVD))
3236 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3237 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3239 ret = dvd_do_auth(cdi, &ai);
3242 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3247 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3252 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3253 ret = cdrom_get_next_writable(cdi, &next);
3256 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3261 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3266 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3267 ret = cdrom_get_last_written(cdi, &last);
3270 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3275 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3278 struct packet_command cgc;
3279 void __user *userptr = (void __user *)arg;
3281 memset(&cgc, 0, sizeof(cgc));
3283 /* build a unified command and queue it through
3284 cdo->generic_packet() */
3287 case CDROMREADMODE1:
3288 case CDROMREADMODE2:
3289 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3290 case CDROMREADAUDIO:
3291 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3293 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3295 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3297 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3300 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3303 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3306 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3307 case DVD_READ_STRUCT:
3308 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3310 return mmc_ioctl_dvd_auth(cdi, userptr);
3311 case CDROM_NEXT_WRITABLE:
3312 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3313 case CDROM_LAST_WRITTEN:
3314 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3321 * Just about every imaginable ioctl is supported in the Uniform layer
3323 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3325 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3326 fmode_t mode, unsigned int cmd, unsigned long arg)
3328 void __user *argp = (void __user *)arg;
3332 * Try the generic SCSI command ioctl's first.
3334 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3339 case CDROMMULTISESSION:
3340 return cdrom_ioctl_multisession(cdi, argp);
3342 return cdrom_ioctl_eject(cdi);
3343 case CDROMCLOSETRAY:
3344 return cdrom_ioctl_closetray(cdi);
3346 return cdrom_ioctl_eject_sw(cdi, arg);
3347 case CDROM_MEDIA_CHANGED:
3348 return cdrom_ioctl_media_changed(cdi, arg);
3349 case CDROM_SET_OPTIONS:
3350 return cdrom_ioctl_set_options(cdi, arg);
3351 case CDROM_CLEAR_OPTIONS:
3352 return cdrom_ioctl_clear_options(cdi, arg);
3353 case CDROM_SELECT_SPEED:
3354 return cdrom_ioctl_select_speed(cdi, arg);
3355 case CDROM_SELECT_DISC:
3356 return cdrom_ioctl_select_disc(cdi, arg);
3358 return cdrom_ioctl_reset(cdi, bdev);
3359 case CDROM_LOCKDOOR:
3360 return cdrom_ioctl_lock_door(cdi, arg);
3362 return cdrom_ioctl_debug(cdi, arg);
3363 case CDROM_GET_CAPABILITY:
3364 return cdrom_ioctl_get_capability(cdi);
3366 return cdrom_ioctl_get_mcn(cdi, argp);
3367 case CDROM_DRIVE_STATUS:
3368 return cdrom_ioctl_drive_status(cdi, arg);
3369 case CDROM_DISC_STATUS:
3370 return cdrom_ioctl_disc_status(cdi);
3371 case CDROM_CHANGER_NSLOTS:
3372 return cdrom_ioctl_changer_nslots(cdi);
3376 * Use the ioctls that are implemented through the generic_packet()
3377 * interface. this may look at bit funny, but if -ENOTTY is
3378 * returned that particular ioctl is not implemented and we
3379 * let it go through the device specific ones.
3381 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3382 ret = mmc_ioctl(cdi, cmd, arg);
3388 * Note: most of the cd_dbg() calls are commented out here,
3389 * because they fill up the sys log when CD players poll
3394 return cdrom_ioctl_get_subchnl(cdi, argp);
3395 case CDROMREADTOCHDR:
3396 return cdrom_ioctl_read_tochdr(cdi, argp);
3397 case CDROMREADTOCENTRY:
3398 return cdrom_ioctl_read_tocentry(cdi, argp);
3400 return cdrom_ioctl_play_msf(cdi, argp);
3401 case CDROMPLAYTRKIND:
3402 return cdrom_ioctl_play_trkind(cdi, argp);
3404 return cdrom_ioctl_volctrl(cdi, argp);
3406 return cdrom_ioctl_volread(cdi, argp);
3411 return cdrom_ioctl_audioctl(cdi, cmd);
3417 EXPORT_SYMBOL(cdrom_get_last_written);
3418 EXPORT_SYMBOL(register_cdrom);
3419 EXPORT_SYMBOL(unregister_cdrom);
3420 EXPORT_SYMBOL(cdrom_open);
3421 EXPORT_SYMBOL(cdrom_release);
3422 EXPORT_SYMBOL(cdrom_ioctl);
3423 EXPORT_SYMBOL(cdrom_media_changed);
3424 EXPORT_SYMBOL(cdrom_number_of_slots);
3425 EXPORT_SYMBOL(cdrom_mode_select);
3426 EXPORT_SYMBOL(cdrom_mode_sense);
3427 EXPORT_SYMBOL(init_cdrom_command);
3428 EXPORT_SYMBOL(cdrom_get_media_event);
3430 #ifdef CONFIG_SYSCTL
3432 #define CDROM_STR_SIZE 1000
3434 static struct cdrom_sysctl_settings {
3435 char info[CDROM_STR_SIZE]; /* general info */
3436 int autoclose; /* close tray upon mount, etc */
3437 int autoeject; /* eject on umount */
3438 int debug; /* turn on debugging messages */
3439 int lock; /* lock the door on device open */
3440 int check; /* check media type */
3441 } cdrom_sysctl_settings;
3443 enum cdrom_print_option {
3450 static int cdrom_print_info(const char *header, int val, char *info,
3451 int *pos, enum cdrom_print_option option)
3453 const int max_size = sizeof(cdrom_sysctl_settings.info);
3454 struct cdrom_device_info *cdi;
3457 ret = scnprintf(info + *pos, max_size - *pos, header);
3463 list_for_each_entry(cdi, &cdrom_list, list) {
3466 ret = scnprintf(info + *pos, max_size - *pos,
3470 ret = scnprintf(info + *pos, max_size - *pos,
3471 "\t%d", cdi->speed);
3474 ret = scnprintf(info + *pos, max_size - *pos,
3475 "\t%d", cdi->capacity);
3477 case CTL_CAPABILITY:
3478 ret = scnprintf(info + *pos, max_size - *pos,
3479 "\t%d", CDROM_CAN(val) != 0);
3482 pr_info("invalid option%d\n", option);
3493 static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3494 void __user *buffer, size_t *lenp, loff_t *ppos)
3497 char *info = cdrom_sysctl_settings.info;
3498 const int max_size = sizeof(cdrom_sysctl_settings.info);
3500 if (!*lenp || (*ppos && !write)) {
3505 mutex_lock(&cdrom_mutex);
3507 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3509 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3511 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3513 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3515 if (cdrom_print_info("\nCan close tray:\t",
3516 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3518 if (cdrom_print_info("\nCan open tray:\t",
3519 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3521 if (cdrom_print_info("\nCan lock tray:\t",
3522 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3524 if (cdrom_print_info("\nCan change speed:",
3525 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3527 if (cdrom_print_info("\nCan select disk:",
3528 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3530 if (cdrom_print_info("\nCan read multisession:",
3531 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3533 if (cdrom_print_info("\nCan read MCN:\t",
3534 CDC_MCN, info, &pos, CTL_CAPABILITY))
3536 if (cdrom_print_info("\nReports media changed:",
3537 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3539 if (cdrom_print_info("\nCan play audio:\t",
3540 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3542 if (cdrom_print_info("\nCan write CD-R:\t",
3543 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3545 if (cdrom_print_info("\nCan write CD-RW:",
3546 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3548 if (cdrom_print_info("\nCan read DVD:\t",
3549 CDC_DVD, info, &pos, CTL_CAPABILITY))
3551 if (cdrom_print_info("\nCan write DVD-R:",
3552 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3554 if (cdrom_print_info("\nCan write DVD-RAM:",
3555 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3557 if (cdrom_print_info("\nCan read MRW:\t",
3558 CDC_MRW, info, &pos, CTL_CAPABILITY))
3560 if (cdrom_print_info("\nCan write MRW:\t",
3561 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3563 if (cdrom_print_info("\nCan write RAM:\t",
3564 CDC_RAM, info, &pos, CTL_CAPABILITY))
3566 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3569 mutex_unlock(&cdrom_mutex);
3570 return proc_dostring(ctl, write, buffer, lenp, ppos);
3572 pr_info("info buffer too small\n");
3576 /* Unfortunately, per device settings are not implemented through
3577 procfs/sysctl yet. When they are, this will naturally disappear. For now
3578 just update all drives. Later this will become the template on which
3579 new registered drives will be based. */
3580 static void cdrom_update_settings(void)
3582 struct cdrom_device_info *cdi;
3584 mutex_lock(&cdrom_mutex);
3585 list_for_each_entry(cdi, &cdrom_list, list) {
3586 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3587 cdi->options |= CDO_AUTO_CLOSE;
3588 else if (!autoclose)
3589 cdi->options &= ~CDO_AUTO_CLOSE;
3590 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3591 cdi->options |= CDO_AUTO_EJECT;
3592 else if (!autoeject)
3593 cdi->options &= ~CDO_AUTO_EJECT;
3594 if (lockdoor && CDROM_CAN(CDC_LOCK))
3595 cdi->options |= CDO_LOCK;
3597 cdi->options &= ~CDO_LOCK;
3598 if (check_media_type)
3599 cdi->options |= CDO_CHECK_TYPE;
3601 cdi->options &= ~CDO_CHECK_TYPE;
3603 mutex_unlock(&cdrom_mutex);
3606 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3607 void __user *buffer, size_t *lenp, loff_t *ppos)
3611 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3615 /* we only care for 1 or 0. */
3616 autoclose = !!cdrom_sysctl_settings.autoclose;
3617 autoeject = !!cdrom_sysctl_settings.autoeject;
3618 debug = !!cdrom_sysctl_settings.debug;
3619 lockdoor = !!cdrom_sysctl_settings.lock;
3620 check_media_type = !!cdrom_sysctl_settings.check;
3622 /* update the option flags according to the changes. we
3623 don't have per device options through sysctl yet,
3624 but we will have and then this will disappear. */
3625 cdrom_update_settings();
3631 /* Place files in /proc/sys/dev/cdrom */
3632 static struct ctl_table cdrom_table[] = {
3635 .data = &cdrom_sysctl_settings.info,
3636 .maxlen = CDROM_STR_SIZE,
3638 .proc_handler = cdrom_sysctl_info,
3641 .procname = "autoclose",
3642 .data = &cdrom_sysctl_settings.autoclose,
3643 .maxlen = sizeof(int),
3645 .proc_handler = cdrom_sysctl_handler,
3648 .procname = "autoeject",
3649 .data = &cdrom_sysctl_settings.autoeject,
3650 .maxlen = sizeof(int),
3652 .proc_handler = cdrom_sysctl_handler,
3655 .procname = "debug",
3656 .data = &cdrom_sysctl_settings.debug,
3657 .maxlen = sizeof(int),
3659 .proc_handler = cdrom_sysctl_handler,
3663 .data = &cdrom_sysctl_settings.lock,
3664 .maxlen = sizeof(int),
3666 .proc_handler = cdrom_sysctl_handler,
3669 .procname = "check_media",
3670 .data = &cdrom_sysctl_settings.check,
3671 .maxlen = sizeof(int),
3673 .proc_handler = cdrom_sysctl_handler
3678 static struct ctl_table cdrom_cdrom_table[] = {
3680 .procname = "cdrom",
3683 .child = cdrom_table,
3688 /* Make sure that /proc/sys/dev is there */
3689 static struct ctl_table cdrom_root_table[] = {
3694 .child = cdrom_cdrom_table,
3698 static struct ctl_table_header *cdrom_sysctl_header;
3700 static void cdrom_sysctl_register(void)
3702 static atomic_t initialized = ATOMIC_INIT(0);
3704 if (!atomic_add_unless(&initialized, 1, 1))
3707 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3709 /* set the defaults */
3710 cdrom_sysctl_settings.autoclose = autoclose;
3711 cdrom_sysctl_settings.autoeject = autoeject;
3712 cdrom_sysctl_settings.debug = debug;
3713 cdrom_sysctl_settings.lock = lockdoor;
3714 cdrom_sysctl_settings.check = check_media_type;
3717 static void cdrom_sysctl_unregister(void)
3719 if (cdrom_sysctl_header)
3720 unregister_sysctl_table(cdrom_sysctl_header);
3723 #else /* CONFIG_SYSCTL */
3725 static void cdrom_sysctl_register(void)
3729 static void cdrom_sysctl_unregister(void)
3733 #endif /* CONFIG_SYSCTL */
3735 static int __init cdrom_init(void)
3737 cdrom_sysctl_register();
3742 static void __exit cdrom_exit(void)
3744 pr_info("Uniform CD-ROM driver unloaded\n");
3745 cdrom_sysctl_unregister();
3748 module_init(cdrom_init);
3749 module_exit(cdrom_exit);
3750 MODULE_LICENSE("GPL");