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.rst 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_common.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 static void signal_media_change(struct cdrom_device_info *cdi)
348 cdi->mc_flags = 0x3; /* set media changed bits, on both queues */
349 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
352 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
353 struct packet_command *cgc)
356 cgc->sshdr->sense_key = 0x05;
357 cgc->sshdr->asc = 0x20;
358 cgc->sshdr->ascq = 0x00;
364 EXPORT_SYMBOL(cdrom_dummy_generic_packet);
366 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
368 struct packet_command cgc;
370 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
371 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
373 cgc.timeout = 5 * 60 * HZ;
375 return cdi->ops->generic_packet(cdi, &cgc);
378 /* requires CD R/RW */
379 static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
380 disc_information *di)
382 const struct cdrom_device_ops *cdo = cdi->ops;
383 struct packet_command cgc;
386 /* set up command and get the disc info */
387 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
388 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
389 cgc.cmd[8] = cgc.buflen = 2;
392 ret = cdo->generic_packet(cdi, &cgc);
396 /* not all drives have the same disc_info length, so requeue
397 * packet with the length the drive tells us it can supply
399 buflen = be16_to_cpu(di->disc_information_length) +
400 sizeof(di->disc_information_length);
402 if (buflen > sizeof(disc_information))
403 buflen = sizeof(disc_information);
405 cgc.cmd[8] = cgc.buflen = buflen;
406 ret = cdo->generic_packet(cdi, &cgc);
410 /* return actual fill size */
414 /* This macro makes sure we don't have to check on cdrom_device_ops
415 * existence in the run-time routines below. Change_capability is a
416 * hack to have the capability flags defined const, while we can still
417 * change it here without gcc complaining at every line.
419 #define ENSURE(cdo, call, bits) \
421 if (cdo->call == NULL) \
422 WARN_ON_ONCE((cdo)->capability & (bits)); \
426 * the first prototypes used 0x2c as the page code for the mrw mode page,
427 * subsequently this was changed to 0x03. probe the one used by this drive
429 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
431 struct packet_command cgc;
434 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
439 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
440 cdi->mrw_mode_page = MRW_MODE_PC;
442 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
443 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
450 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
452 struct packet_command cgc;
453 struct mrw_feature_desc *mfd;
454 unsigned char buffer[16];
459 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
461 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
462 cgc.cmd[3] = CDF_MRW;
463 cgc.cmd[8] = sizeof(buffer);
466 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
469 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
470 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
474 if ((ret = cdrom_mrw_probe_pc(cdi))) {
482 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
484 struct packet_command cgc;
485 unsigned char buffer[12];
488 pr_info("%sstarting format\n", cont ? "Re" : "");
491 * FmtData bit set (bit 4), format type is 1
493 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
494 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
495 cgc.cmd[1] = (1 << 4) | 1;
497 cgc.timeout = 5 * 60 * HZ;
500 * 4 byte format list header, 8 byte format list descriptor
513 buffer[8] = 0x24 << 2;
516 ret = cdi->ops->generic_packet(cdi, &cgc);
518 pr_info("bgformat failed\n");
523 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
525 struct packet_command cgc;
527 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
528 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
531 * Session = 1, Track = 0
533 cgc.cmd[1] = !!immed;
536 cgc.timeout = 5 * 60 * HZ;
538 return cdi->ops->generic_packet(cdi, &cgc);
541 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
546 ret = cdrom_get_disc_info(cdi, &di);
547 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
551 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
552 pr_info("issuing MRW background format suspend\n");
553 ret = cdrom_mrw_bgformat_susp(cdi, 0);
556 if (!ret && cdi->media_written)
557 ret = cdrom_flush_cache(cdi);
562 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
564 struct packet_command cgc;
565 struct mode_page_header *mph;
567 int ret, offset, size;
569 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
572 cgc.buflen = sizeof(buffer);
574 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
578 mph = (struct mode_page_header *)buffer;
579 offset = be16_to_cpu(mph->desc_length);
580 size = be16_to_cpu(mph->mode_data_length) + 2;
582 buffer[offset + 3] = space;
585 ret = cdrom_mode_select(cdi, &cgc);
589 pr_info("%s: mrw address space %s selected\n",
590 cdi->name, mrw_address_space[space]);
594 int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
596 static char banner_printed;
597 const struct cdrom_device_ops *cdo = cdi->ops;
599 cd_dbg(CD_OPEN, "entering register_cdrom\n");
601 if (cdo->open == NULL || cdo->release == NULL)
603 if (!banner_printed) {
604 pr_info("Uniform CD-ROM driver " REVISION "\n");
606 cdrom_sysctl_register();
612 ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
613 if (cdo->check_events == NULL)
614 WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
615 ENSURE(cdo, tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
616 ENSURE(cdo, lock_door, CDC_LOCK);
617 ENSURE(cdo, select_speed, CDC_SELECT_SPEED);
618 ENSURE(cdo, get_last_session, CDC_MULTI_SESSION);
619 ENSURE(cdo, get_mcn, CDC_MCN);
620 ENSURE(cdo, reset, CDC_RESET);
621 ENSURE(cdo, generic_packet, CDC_GENERIC_PACKET);
623 cdi->options = CDO_USE_FFLAGS;
624 cdi->last_media_change_ms = ktime_to_ms(ktime_get());
626 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
627 cdi->options |= (int) CDO_AUTO_CLOSE;
628 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
629 cdi->options |= (int) CDO_AUTO_EJECT;
631 cdi->options |= (int) CDO_LOCK;
632 if (check_media_type == 1)
633 cdi->options |= (int) CDO_CHECK_TYPE;
635 if (CDROM_CAN(CDC_MRW_W))
636 cdi->exit = cdrom_mrw_exit;
638 if (cdi->ops->read_cdda_bpc)
639 cdi->cdda_method = CDDA_BPC_FULL;
641 cdi->cdda_method = CDDA_OLD;
643 WARN_ON(!cdo->generic_packet);
645 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
646 mutex_lock(&cdrom_mutex);
647 list_add(&cdi->list, &cdrom_list);
648 mutex_unlock(&cdrom_mutex);
653 void unregister_cdrom(struct cdrom_device_info *cdi)
655 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
657 mutex_lock(&cdrom_mutex);
658 list_del(&cdi->list);
659 mutex_unlock(&cdrom_mutex);
664 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
667 int cdrom_get_media_event(struct cdrom_device_info *cdi,
668 struct media_event_desc *med)
670 struct packet_command cgc;
671 unsigned char buffer[8];
672 struct event_header *eh = (struct event_header *)buffer;
674 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
675 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
676 cgc.cmd[1] = 1; /* IMMED */
677 cgc.cmd[4] = 1 << 4; /* media event */
678 cgc.cmd[8] = sizeof(buffer);
681 if (cdi->ops->generic_packet(cdi, &cgc))
684 if (be16_to_cpu(eh->data_len) < sizeof(*med))
687 if (eh->nea || eh->notification_class != 0x4)
690 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
694 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
695 struct rwrt_feature_desc *rfd)
697 struct packet_command cgc;
701 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
703 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
704 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
705 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
708 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
711 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
715 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
717 struct packet_command cgc;
719 __be16 *feature_code;
722 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
724 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
725 cgc.cmd[3] = CDF_HWDM;
726 cgc.cmd[8] = sizeof(buffer);
729 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
732 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
733 if (be16_to_cpu(*feature_code) == CDF_HWDM)
740 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
742 struct rwrt_feature_desc rfd;
747 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
750 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
756 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
761 ret = cdrom_get_disc_info(cdi, &di);
762 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
769 * FIXME: check RO bit
771 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
773 int ret = cdrom_media_erasable(cdi);
776 * allow writable open if media info read worked and media is
777 * erasable, _or_ if it fails since not all drives support it
785 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
791 * always reset to DMA lba space on open
793 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
794 pr_err("failed setting lba address space\n");
798 ret = cdrom_get_disc_info(cdi, &di);
799 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
807 * 0 - not MRW formatted
808 * 1 - MRW bgformat started, but not running or complete
809 * 2 - MRW bgformat in progress
810 * 3 - MRW formatting complete
813 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
816 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
818 ret = cdrom_mrw_bgformat(cdi, 1);
823 static int mo_open_write(struct cdrom_device_info *cdi)
825 struct packet_command cgc;
829 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
833 * obtain write protect information as per
834 * drivers/scsi/sd.c:sd_read_write_protect_flag
837 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
839 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
842 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
845 /* drive gave us no info, let the user go ahead */
849 return buffer[3] & 0x80;
852 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
854 struct rwrt_feature_desc rfd;
857 if ((ret = cdrom_has_defect_mgt(cdi)))
860 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
862 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
865 cd_dbg(CD_OPEN, "can open for random write\n");
869 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
871 struct packet_command cgc;
875 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
877 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
879 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
880 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
883 if (cdi->ops->generic_packet(cdi, &cgc))
884 mmc3_profile = 0xffff;
886 mmc3_profile = (buffer[6] << 8) | buffer[7];
888 cdi->mmc3_profile = mmc3_profile;
891 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
893 switch (cdi->mmc3_profile) {
894 case 0x12: /* DVD-RAM */
895 case 0x1A: /* DVD+RW */
896 case 0x43: /* BD-RE */
904 * returns 0 for ok to open write, non-0 to disallow
906 static int cdrom_open_write(struct cdrom_device_info *cdi)
908 int mrw, mrw_write, ram_write;
912 if (!cdrom_is_mrw(cdi, &mrw_write))
915 if (CDROM_CAN(CDC_MO_DRIVE))
918 (void) cdrom_is_random_writable(cdi, &ram_write);
921 cdi->mask &= ~CDC_MRW;
923 cdi->mask |= CDC_MRW;
926 cdi->mask &= ~CDC_MRW_W;
928 cdi->mask |= CDC_MRW_W;
931 cdi->mask &= ~CDC_RAM;
933 cdi->mask |= CDC_RAM;
935 if (CDROM_CAN(CDC_MRW_W))
936 ret = cdrom_mrw_open_write(cdi);
937 else if (CDROM_CAN(CDC_DVD_RAM))
938 ret = cdrom_dvdram_open_write(cdi);
939 else if (CDROM_CAN(CDC_RAM) &&
940 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
941 ret = cdrom_ram_open_write(cdi);
942 else if (CDROM_CAN(CDC_MO_DRIVE))
943 ret = mo_open_write(cdi);
944 else if (!cdrom_is_dvd_rw(cdi))
950 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
952 struct packet_command cgc;
954 if (cdi->mmc3_profile != 0x1a) {
955 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
959 if (!cdi->media_written) {
960 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
964 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
966 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
967 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
969 cdi->ops->generic_packet(cdi, &cgc);
971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
972 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
973 cgc.timeout = 3000*HZ;
975 cdi->ops->generic_packet(cdi, &cgc);
977 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
978 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
979 cgc.cmd[2] = 2; /* Close session */
981 cgc.timeout = 3000*HZ;
982 cdi->ops->generic_packet(cdi, &cgc);
984 cdi->media_written = 0;
987 static int cdrom_close_write(struct cdrom_device_info *cdi)
990 return cdrom_flush_cache(cdi);
996 /* badly broken, I know. Is due for a fixup anytime. */
997 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
999 struct cdrom_tochdr header;
1000 struct cdrom_tocentry entry;
1007 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1009 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1010 tracks->error = CDS_NO_INFO;
1014 /* Grab the TOC header so we can see how many tracks there are */
1015 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1017 if (ret == -ENOMEDIUM)
1018 tracks->error = CDS_NO_DISC;
1020 tracks->error = CDS_NO_INFO;
1023 /* check what type of tracks are on this disc */
1024 entry.cdte_format = CDROM_MSF;
1025 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1026 entry.cdte_track = i;
1027 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1028 tracks->error = CDS_NO_INFO;
1031 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1032 if (entry.cdte_format == 0x10)
1034 else if (entry.cdte_format == 0x20)
1041 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1042 i, entry.cdte_format, entry.cdte_ctrl);
1044 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1045 header.cdth_trk1, tracks->audio, tracks->data,
1046 tracks->cdi, tracks->xa);
1050 int open_for_data(struct cdrom_device_info *cdi)
1053 const struct cdrom_device_ops *cdo = cdi->ops;
1055 cd_dbg(CD_OPEN, "entering open_for_data\n");
1056 /* Check if the driver can report drive status. If it can, we
1057 can do clever things. If it can't, well, we at least tried! */
1058 if (cdo->drive_status != NULL) {
1059 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1060 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1061 if (ret == CDS_TRAY_OPEN) {
1062 cd_dbg(CD_OPEN, "the tray is open...\n");
1063 /* can/may i close it? */
1064 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1065 cdi->options & CDO_AUTO_CLOSE) {
1066 cd_dbg(CD_OPEN, "trying to close the tray\n");
1067 ret=cdo->tray_move(cdi,0);
1069 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1070 /* Ignore the error from the low
1071 level driver. We don't care why it
1072 couldn't close the tray. We only care
1073 that there is no disc in the drive,
1074 since that is the _REAL_ problem here.*/
1076 goto clean_up_and_return;
1079 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1081 goto clean_up_and_return;
1083 /* Ok, the door should be closed now.. Check again */
1084 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1085 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1086 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1087 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1089 goto clean_up_and_return;
1091 cd_dbg(CD_OPEN, "the tray is now closed\n");
1093 /* the door should be closed now, check for the disc */
1094 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1095 if (ret!=CDS_DISC_OK) {
1097 goto clean_up_and_return;
1100 cdrom_count_tracks(cdi, &tracks);
1101 if (tracks.error == CDS_NO_DISC) {
1102 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1104 goto clean_up_and_return;
1106 /* CD-Players which don't use O_NONBLOCK, workman
1107 * for example, need bit CDO_CHECK_TYPE cleared! */
1108 if (tracks.data==0) {
1109 if (cdi->options & CDO_CHECK_TYPE) {
1110 /* give people a warning shot, now that CDO_CHECK_TYPE
1111 is the default case! */
1112 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1113 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1114 (unsigned int)task_pid_nr(current));
1116 goto clean_up_and_return;
1119 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1123 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1125 /* all seems well, we can open the device */
1126 ret = cdo->open(cdi, 0); /* open for data */
1127 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1128 /* After all this careful checking, we shouldn't have problems
1129 opening the device, but we don't want the device locked if
1130 this somehow fails... */
1132 cd_dbg(CD_OPEN, "open device failed\n");
1133 goto clean_up_and_return;
1135 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1136 cdo->lock_door(cdi, 1);
1137 cd_dbg(CD_OPEN, "door locked\n");
1139 cd_dbg(CD_OPEN, "device opened successfully\n");
1142 /* Something failed. Try to unlock the drive, because some drivers
1143 (notably ide-cd) lock the drive after every command. This produced
1144 a nasty bug where after mount failed, the drive would remain locked!
1145 This ensures that the drive gets unlocked after a mount fails. This
1146 is a goto to avoid bloating the driver with redundant code. */
1147 clean_up_and_return:
1148 cd_dbg(CD_OPEN, "open failed\n");
1149 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1150 cdo->lock_door(cdi, 0);
1151 cd_dbg(CD_OPEN, "door unlocked\n");
1156 /* We use the open-option O_NONBLOCK to indicate that the
1157 * purpose of opening is only for subsequent ioctl() calls; no device
1158 * integrity checks are performed.
1160 * We hope that all cd-player programs will adopt this convention. It
1161 * is in their own interest: device control becomes a lot easier
1164 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1169 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1171 /* if this was a O_NONBLOCK open and we should honor the flags,
1172 * do a quick open without drive/disc integrity checks. */
1174 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1175 ret = cdi->ops->open(cdi, 1);
1177 ret = open_for_data(cdi);
1180 if (CDROM_CAN(CDC_GENERIC_PACKET))
1181 cdrom_mmc3_profile(cdi);
1182 if (mode & FMODE_WRITE) {
1184 if (cdrom_open_write(cdi))
1186 if (!CDROM_CAN(CDC_RAM))
1189 cdi->media_written = 0;
1196 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1197 cdi->name, cdi->use_count);
1200 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1201 cdi->ops->lock_door(cdi, 0);
1202 cd_dbg(CD_OPEN, "door unlocked\n");
1204 cdi->ops->release(cdi);
1210 /* This code is similar to that in open_for_data. The routine is called
1211 whenever an audio play operation is requested.
1213 static int check_for_audio_disc(struct cdrom_device_info *cdi,
1214 const struct cdrom_device_ops *cdo)
1218 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1219 if (!(cdi->options & CDO_CHECK_TYPE))
1221 if (cdo->drive_status != NULL) {
1222 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1223 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1224 if (ret == CDS_TRAY_OPEN) {
1225 cd_dbg(CD_OPEN, "the tray is open...\n");
1226 /* can/may i close it? */
1227 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1228 cdi->options & CDO_AUTO_CLOSE) {
1229 cd_dbg(CD_OPEN, "trying to close the tray\n");
1230 ret=cdo->tray_move(cdi,0);
1232 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1233 /* Ignore the error from the low
1234 level driver. We don't care why it
1235 couldn't close the tray. We only care
1236 that there is no disc in the drive,
1237 since that is the _REAL_ problem here.*/
1241 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1244 /* Ok, the door should be closed now.. Check again */
1245 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1246 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1247 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1250 if (ret!=CDS_DISC_OK) {
1251 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1254 cd_dbg(CD_OPEN, "the tray is now closed\n");
1257 cdrom_count_tracks(cdi, &tracks);
1259 return(tracks.error);
1261 if (tracks.audio==0)
1262 return -EMEDIUMTYPE;
1267 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1269 const struct cdrom_device_ops *cdo = cdi->ops;
1270 int opened_for_data;
1272 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1274 if (cdi->use_count > 0)
1277 if (cdi->use_count == 0) {
1278 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1280 cdrom_dvd_rw_close_write(cdi);
1282 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1283 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1284 cdo->lock_door(cdi, 0);
1288 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1289 !(mode & FMODE_NDELAY);
1292 * flush cache on last write release
1294 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1295 cdrom_close_write(cdi);
1298 if (cdi->use_count == 0) { /* last process that closes dev*/
1299 if (opened_for_data &&
1300 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1301 cdo->tray_move(cdi, 1);
1305 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1306 struct cdrom_changer_info *buf)
1308 struct packet_command cgc;
1309 const struct cdrom_device_ops *cdo = cdi->ops;
1313 * Sanyo changer isn't spec compliant (doesn't use regular change
1314 * LOAD_UNLOAD command, and it doesn't implement the mech status
1317 if (cdi->sanyo_slot) {
1318 buf->hdr.nslots = 3;
1319 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1320 for (length = 0; length < 3; length++) {
1321 buf->slots[length].disc_present = 1;
1322 buf->slots[length].change = 0;
1327 length = sizeof(struct cdrom_mechstat_header) +
1328 cdi->capacity * sizeof(struct cdrom_slot);
1330 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1331 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1332 cgc.cmd[8] = (length >> 8) & 0xff;
1333 cgc.cmd[9] = length & 0xff;
1334 return cdo->generic_packet(cdi, &cgc);
1337 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1339 struct cdrom_changer_info *info;
1342 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1343 if (cdi->sanyo_slot)
1346 info = kmalloc(sizeof(*info), GFP_KERNEL);
1350 if ((ret = cdrom_read_mech_status(cdi, info)))
1353 if (info->slots[slot].disc_present)
1363 /* Return the number of slots for an ATAPI/SCSI cdrom,
1364 * return 1 if not a changer.
1366 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1370 struct cdrom_changer_info *info;
1372 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1373 /* cdrom_read_mech_status requires a valid value for capacity: */
1376 info = kmalloc(sizeof(*info), GFP_KERNEL);
1380 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1381 nslots = info->hdr.nslots;
1388 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1389 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1391 struct packet_command cgc;
1393 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1394 if (cdi->sanyo_slot && slot < 0)
1397 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1398 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1399 cgc.cmd[4] = 2 + (slot >= 0);
1401 cgc.timeout = 60 * HZ;
1403 /* The Sanyo 3 CD changer uses byte 7 of the
1404 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1405 using the GPCMD_LOAD_UNLOAD opcode. */
1406 if (cdi->sanyo_slot && -1 < slot) {
1407 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1409 cgc.cmd[4] = cgc.cmd[8] = 0;
1410 cdi->sanyo_slot = slot ? slot : 3;
1413 return cdi->ops->generic_packet(cdi, &cgc);
1416 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1418 struct cdrom_changer_info *info;
1422 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1423 if (!CDROM_CAN(CDC_SELECT_DISC))
1424 return -EDRIVE_CANT_DO_THIS;
1426 if (cdi->ops->check_events)
1427 cdi->ops->check_events(cdi, 0, slot);
1429 if (slot == CDSL_NONE) {
1430 signal_media_change(cdi);
1431 return cdrom_load_unload(cdi, -1);
1434 info = kmalloc(sizeof(*info), GFP_KERNEL);
1438 if ((ret = cdrom_read_mech_status(cdi, info))) {
1443 curslot = info->hdr.curslot;
1446 if (cdi->use_count > 1 || cdi->keeplocked) {
1447 if (slot == CDSL_CURRENT) {
1454 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1455 which is useful if it had been previously unloaded.
1456 Whether it can or not, it returns the current slot.
1457 Similarly, if slot happens to be the current one, we still
1459 if (slot == CDSL_CURRENT)
1462 /* set media changed bits on both queues */
1463 signal_media_change(cdi);
1464 if ((ret = cdrom_load_unload(cdi, slot)))
1471 * As cdrom implements an extra ioctl consumer for media changed
1472 * event, it needs to buffer ->check_events() output, such that event
1473 * is not lost for both the usual VFS and ioctl paths.
1474 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1477 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1478 * called in parallel and buffering fields are accessed without any
1479 * exclusion. The original media_changed code had the same problem.
1480 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1481 * and remove this cruft altogether. It doesn't have much usefulness
1484 static void cdrom_update_events(struct cdrom_device_info *cdi,
1485 unsigned int clearing)
1487 unsigned int events;
1489 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1490 cdi->vfs_events |= events;
1491 cdi->ioctl_events |= events;
1494 unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1495 unsigned int clearing)
1497 unsigned int events;
1499 cdrom_update_events(cdi, clearing);
1500 events = cdi->vfs_events;
1501 cdi->vfs_events = 0;
1504 EXPORT_SYMBOL(cdrom_check_events);
1506 /* We want to make media_changed accessible to the user through an
1507 * ioctl. The main problem now is that we must double-buffer the
1508 * low-level implementation, to assure that the VFS and the user both
1509 * see a medium change once.
1513 int media_changed(struct cdrom_device_info *cdi, int queue)
1515 unsigned int mask = (1 << (queue & 1));
1516 int ret = !!(cdi->mc_flags & mask);
1519 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1522 /* changed since last call? */
1523 BUG_ON(!queue); /* shouldn't be called from VFS path */
1524 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1525 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1526 cdi->ioctl_events = 0;
1529 signal_media_change(cdi);
1531 cdi->media_written = 0;
1534 cdi->mc_flags &= ~mask; /* clear bit */
1538 /* Requests to the low-level drivers will /always/ be done in the
1539 following format convention:
1541 CDROM_LBA: all data-related requests.
1542 CDROM_MSF: all audio-related requests.
1544 However, a low-level implementation is allowed to refuse this
1545 request, and return information in its own favorite format.
1547 It doesn't make sense /at all/ to ask for a play_audio in LBA
1548 format, or ask for multi-session info in MSF format. However, for
1549 backward compatibility these format requests will be satisfied, but
1550 the requests to the low-level drivers will be sanitized in the more
1551 meaningful format indicated above.
1555 void sanitize_format(union cdrom_addr *addr,
1556 u_char * curr, u_char requested)
1558 if (*curr == requested)
1559 return; /* nothing to be done! */
1560 if (requested == CDROM_LBA) {
1561 addr->lba = (int) addr->msf.frame +
1562 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1563 } else { /* CDROM_MSF */
1564 int lba = addr->lba;
1565 addr->msf.frame = lba % 75;
1568 addr->msf.second = lba % 60;
1569 addr->msf.minute = lba / 60;
1574 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1577 memset(cgc, 0, sizeof(struct packet_command));
1579 memset(buf, 0, len);
1580 cgc->buffer = (char *) buf;
1582 cgc->data_direction = type;
1583 cgc->timeout = CDROM_DEF_TIMEOUT;
1588 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1589 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1591 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1593 cgc->cmd[0] = GPCMD_REPORT_KEY;
1594 cgc->cmd[10] = type | (agid << 6);
1596 case 0: case 8: case 5: {
1609 cgc->cmd[9] = cgc->buflen;
1610 cgc->data_direction = CGC_DATA_READ;
1613 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1615 cgc->cmd[0] = GPCMD_SEND_KEY;
1616 cgc->cmd[10] = type | (agid << 6);
1631 cgc->cmd[9] = cgc->buflen;
1632 cgc->data_direction = CGC_DATA_WRITE;
1635 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1639 struct packet_command cgc;
1640 const struct cdrom_device_ops *cdo = cdi->ops;
1641 rpc_state_t rpc_state;
1643 memset(buf, 0, sizeof(buf));
1644 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1648 case DVD_LU_SEND_AGID:
1649 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1651 setup_report_key(&cgc, ai->lsa.agid, 0);
1653 if ((ret = cdo->generic_packet(cdi, &cgc)))
1656 ai->lsa.agid = buf[7] >> 6;
1657 /* Returning data, let host change state */
1660 case DVD_LU_SEND_KEY1:
1661 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1662 setup_report_key(&cgc, ai->lsk.agid, 2);
1664 if ((ret = cdo->generic_packet(cdi, &cgc)))
1667 copy_key(ai->lsk.key, &buf[4]);
1668 /* Returning data, let host change state */
1671 case DVD_LU_SEND_CHALLENGE:
1672 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1673 setup_report_key(&cgc, ai->lsc.agid, 1);
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
1678 copy_chal(ai->lsc.chal, &buf[4]);
1679 /* Returning data, let host change state */
1683 case DVD_LU_SEND_TITLE_KEY:
1684 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1686 setup_report_key(&cgc, ai->lstk.agid, 4);
1687 cgc.cmd[5] = ai->lstk.lba;
1688 cgc.cmd[4] = ai->lstk.lba >> 8;
1689 cgc.cmd[3] = ai->lstk.lba >> 16;
1690 cgc.cmd[2] = ai->lstk.lba >> 24;
1692 if ((ret = cdo->generic_packet(cdi, &cgc)))
1695 ai->lstk.cpm = (buf[4] >> 7) & 1;
1696 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1697 ai->lstk.cgms = (buf[4] >> 4) & 3;
1698 copy_key(ai->lstk.title_key, &buf[5]);
1699 /* Returning data, let host change state */
1702 case DVD_LU_SEND_ASF:
1703 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1704 setup_report_key(&cgc, ai->lsasf.agid, 5);
1706 if ((ret = cdo->generic_packet(cdi, &cgc)))
1709 ai->lsasf.asf = buf[7] & 1;
1712 /* LU data receive (LU changes state) */
1713 case DVD_HOST_SEND_CHALLENGE:
1714 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1715 setup_send_key(&cgc, ai->hsc.agid, 1);
1717 copy_chal(&buf[4], ai->hsc.chal);
1719 if ((ret = cdo->generic_packet(cdi, &cgc)))
1722 ai->type = DVD_LU_SEND_KEY1;
1725 case DVD_HOST_SEND_KEY2:
1726 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1727 setup_send_key(&cgc, ai->hsk.agid, 3);
1729 copy_key(&buf[4], ai->hsk.key);
1731 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1732 ai->type = DVD_AUTH_FAILURE;
1735 ai->type = DVD_AUTH_ESTABLISHED;
1739 case DVD_INVALIDATE_AGID:
1741 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1742 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1743 if ((ret = cdo->generic_packet(cdi, &cgc)))
1747 /* Get region settings */
1748 case DVD_LU_SEND_RPC_STATE:
1749 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1750 setup_report_key(&cgc, 0, 8);
1751 memset(&rpc_state, 0, sizeof(rpc_state_t));
1752 cgc.buffer = (char *) &rpc_state;
1754 if ((ret = cdo->generic_packet(cdi, &cgc)))
1757 ai->lrpcs.type = rpc_state.type_code;
1758 ai->lrpcs.vra = rpc_state.vra;
1759 ai->lrpcs.ucca = rpc_state.ucca;
1760 ai->lrpcs.region_mask = rpc_state.region_mask;
1761 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1764 /* Set region settings */
1765 case DVD_HOST_SEND_RPC_STATE:
1766 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1767 setup_send_key(&cgc, 0, 6);
1769 buf[4] = ai->hrpcs.pdrc;
1771 if ((ret = cdo->generic_packet(cdi, &cgc)))
1776 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1783 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1784 struct packet_command *cgc)
1786 unsigned char buf[21], *base;
1787 struct dvd_layer *layer;
1788 const struct cdrom_device_ops *cdo = cdi->ops;
1789 int ret, layer_num = s->physical.layer_num;
1791 if (layer_num >= DVD_LAYERS)
1794 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1795 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1796 cgc->cmd[6] = layer_num;
1797 cgc->cmd[7] = s->type;
1798 cgc->cmd[9] = cgc->buflen & 0xff;
1801 * refrain from reporting errors on non-existing layers (mainly)
1805 ret = cdo->generic_packet(cdi, cgc);
1810 layer = &s->physical.layer[layer_num];
1813 * place the data... really ugly, but at least we won't have to
1814 * worry about endianess in userspace.
1816 memset(layer, 0, sizeof(*layer));
1817 layer->book_version = base[0] & 0xf;
1818 layer->book_type = base[0] >> 4;
1819 layer->min_rate = base[1] & 0xf;
1820 layer->disc_size = base[1] >> 4;
1821 layer->layer_type = base[2] & 0xf;
1822 layer->track_path = (base[2] >> 4) & 1;
1823 layer->nlayers = (base[2] >> 5) & 3;
1824 layer->track_density = base[3] & 0xf;
1825 layer->linear_density = base[3] >> 4;
1826 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1827 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1828 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1829 layer->bca = base[16] >> 7;
1834 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1835 struct packet_command *cgc)
1839 const struct cdrom_device_ops *cdo = cdi->ops;
1841 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1842 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1843 cgc->cmd[6] = s->copyright.layer_num;
1844 cgc->cmd[7] = s->type;
1845 cgc->cmd[8] = cgc->buflen >> 8;
1846 cgc->cmd[9] = cgc->buflen & 0xff;
1848 ret = cdo->generic_packet(cdi, cgc);
1852 s->copyright.cpst = buf[4];
1853 s->copyright.rmi = buf[5];
1858 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1859 struct packet_command *cgc)
1863 const struct cdrom_device_ops *cdo = cdi->ops;
1865 size = sizeof(s->disckey.value) + 4;
1867 buf = kmalloc(size, GFP_KERNEL);
1871 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1872 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1873 cgc->cmd[7] = s->type;
1874 cgc->cmd[8] = size >> 8;
1875 cgc->cmd[9] = size & 0xff;
1876 cgc->cmd[10] = s->disckey.agid << 6;
1878 ret = cdo->generic_packet(cdi, cgc);
1880 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1886 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1887 struct packet_command *cgc)
1889 int ret, size = 4 + 188;
1891 const struct cdrom_device_ops *cdo = cdi->ops;
1893 buf = kmalloc(size, GFP_KERNEL);
1897 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1898 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1899 cgc->cmd[7] = s->type;
1900 cgc->cmd[9] = cgc->buflen & 0xff;
1902 ret = cdo->generic_packet(cdi, cgc);
1906 s->bca.len = buf[0] << 8 | buf[1];
1907 if (s->bca.len < 12 || s->bca.len > 188) {
1908 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1913 memcpy(s->bca.value, &buf[4], s->bca.len);
1920 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1921 struct packet_command *cgc)
1925 const struct cdrom_device_ops *cdo = cdi->ops;
1927 size = sizeof(s->manufact.value) + 4;
1929 buf = kmalloc(size, GFP_KERNEL);
1933 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1934 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1935 cgc->cmd[7] = s->type;
1936 cgc->cmd[8] = size >> 8;
1937 cgc->cmd[9] = size & 0xff;
1939 ret = cdo->generic_packet(cdi, cgc);
1943 s->manufact.len = buf[0] << 8 | buf[1];
1944 if (s->manufact.len < 0) {
1945 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1949 if (s->manufact.len > 2048) {
1950 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1952 s->manufact.len = 2048;
1954 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1962 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1963 struct packet_command *cgc)
1966 case DVD_STRUCT_PHYSICAL:
1967 return dvd_read_physical(cdi, s, cgc);
1969 case DVD_STRUCT_COPYRIGHT:
1970 return dvd_read_copyright(cdi, s, cgc);
1972 case DVD_STRUCT_DISCKEY:
1973 return dvd_read_disckey(cdi, s, cgc);
1975 case DVD_STRUCT_BCA:
1976 return dvd_read_bca(cdi, s, cgc);
1978 case DVD_STRUCT_MANUFACT:
1979 return dvd_read_manufact(cdi, s, cgc);
1982 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1988 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1989 struct packet_command *cgc,
1990 int page_code, int page_control)
1992 const struct cdrom_device_ops *cdo = cdi->ops;
1994 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1996 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1997 cgc->cmd[2] = page_code | (page_control << 6);
1998 cgc->cmd[7] = cgc->buflen >> 8;
1999 cgc->cmd[8] = cgc->buflen & 0xff;
2000 cgc->data_direction = CGC_DATA_READ;
2001 return cdo->generic_packet(cdi, cgc);
2004 int cdrom_mode_select(struct cdrom_device_info *cdi,
2005 struct packet_command *cgc)
2007 const struct cdrom_device_ops *cdo = cdi->ops;
2009 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2010 memset(cgc->buffer, 0, 2);
2011 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2012 cgc->cmd[1] = 0x10; /* PF */
2013 cgc->cmd[7] = cgc->buflen >> 8;
2014 cgc->cmd[8] = cgc->buflen & 0xff;
2015 cgc->data_direction = CGC_DATA_WRITE;
2016 return cdo->generic_packet(cdi, cgc);
2019 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2020 struct cdrom_subchnl *subchnl, int mcn)
2022 const struct cdrom_device_ops *cdo = cdi->ops;
2023 struct packet_command cgc;
2027 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2028 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2029 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2030 cgc.cmd[2] = 0x40; /* request subQ data */
2031 cgc.cmd[3] = mcn ? 2 : 1;
2034 if ((ret = cdo->generic_packet(cdi, &cgc)))
2037 subchnl->cdsc_audiostatus = cgc.buffer[1];
2038 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2039 subchnl->cdsc_trk = cgc.buffer[6];
2040 subchnl->cdsc_ind = cgc.buffer[7];
2042 if (subchnl->cdsc_format == CDROM_LBA) {
2043 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2044 (cgc.buffer[9] << 16) |
2045 (cgc.buffer[10] << 8) |
2047 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2048 (cgc.buffer[13] << 16) |
2049 (cgc.buffer[14] << 8) |
2052 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2053 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2054 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2055 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2056 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2057 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2064 * Specific READ_10 interface
2066 static int cdrom_read_cd(struct cdrom_device_info *cdi,
2067 struct packet_command *cgc, int lba,
2068 int blocksize, int nblocks)
2070 const struct cdrom_device_ops *cdo = cdi->ops;
2072 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2073 cgc->cmd[0] = GPCMD_READ_10;
2074 cgc->cmd[2] = (lba >> 24) & 0xff;
2075 cgc->cmd[3] = (lba >> 16) & 0xff;
2076 cgc->cmd[4] = (lba >> 8) & 0xff;
2077 cgc->cmd[5] = lba & 0xff;
2078 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2079 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2080 cgc->cmd[8] = nblocks & 0xff;
2081 cgc->buflen = blocksize * nblocks;
2082 return cdo->generic_packet(cdi, cgc);
2085 /* very generic interface for reading the various types of blocks */
2086 static int cdrom_read_block(struct cdrom_device_info *cdi,
2087 struct packet_command *cgc,
2088 int lba, int nblocks, int format, int blksize)
2090 const struct cdrom_device_ops *cdo = cdi->ops;
2092 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2093 cgc->cmd[0] = GPCMD_READ_CD;
2094 /* expected sector size - cdda,mode1,etc. */
2095 cgc->cmd[1] = format << 2;
2096 /* starting address */
2097 cgc->cmd[2] = (lba >> 24) & 0xff;
2098 cgc->cmd[3] = (lba >> 16) & 0xff;
2099 cgc->cmd[4] = (lba >> 8) & 0xff;
2100 cgc->cmd[5] = lba & 0xff;
2101 /* number of blocks */
2102 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2103 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2104 cgc->cmd[8] = nblocks & 0xff;
2105 cgc->buflen = blksize * nblocks;
2107 /* set the header info returned */
2109 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2110 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2111 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2112 default : cgc->cmd[9] = 0x10;
2115 return cdo->generic_packet(cdi, cgc);
2118 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2119 int lba, int nframes)
2121 struct packet_command cgc;
2125 cdi->last_sense = 0;
2127 memset(&cgc, 0, sizeof(cgc));
2130 * start with will ra.nframes size, back down if alloc fails
2134 cgc.buffer = kmalloc_array(nr, CD_FRAMESIZE_RAW, GFP_KERNEL);
2144 cgc.data_direction = CGC_DATA_READ;
2145 while (nframes > 0) {
2149 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2152 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2156 ubuf += CD_FRAMESIZE_RAW * nr;
2164 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2165 int lba, int nframes)
2167 int max_frames = (queue_max_sectors(cdi->disk->queue) << 9) /
2171 cdi->last_sense = 0;
2174 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2177 nr = min(nframes, max_frames);
2179 ret = cdi->ops->read_cdda_bpc(cdi, ubuf, lba, nr,
2186 ubuf += (nr * CD_FRAMESIZE_RAW);
2192 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2193 int lba, int nframes)
2197 if (cdi->cdda_method == CDDA_OLD)
2198 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2202 * for anything else than success and io error, we need to retry
2204 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2205 if (!ret || ret != -EIO)
2209 * I've seen drives get sense 4/8/3 udma crc errors on multi
2210 * frame dma, so drop to single frame dma if we need to
2212 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2213 pr_info("dropping to single frame dma\n");
2214 cdi->cdda_method = CDDA_BPC_SINGLE;
2219 * so we have an io error of some sort with multi frame dma. if the
2220 * condition wasn't a hardware error
2221 * problems, not for any error
2223 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2226 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2227 cdi->cdda_method = CDDA_OLD;
2228 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2231 int cdrom_multisession(struct cdrom_device_info *cdi,
2232 struct cdrom_multisession *info)
2234 u8 requested_format;
2237 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2240 requested_format = info->addr_format;
2241 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2243 info->addr_format = CDROM_LBA;
2245 ret = cdi->ops->get_last_session(cdi, info);
2247 sanitize_format(&info->addr, &info->addr_format,
2251 EXPORT_SYMBOL_GPL(cdrom_multisession);
2253 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2256 struct cdrom_multisession info;
2259 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2261 if (copy_from_user(&info, argp, sizeof(info)))
2263 ret = cdrom_multisession(cdi, &info);
2266 if (copy_to_user(argp, &info, sizeof(info)))
2269 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2273 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2275 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2277 if (!CDROM_CAN(CDC_OPEN_TRAY))
2279 if (cdi->use_count != 1 || cdi->keeplocked)
2281 if (CDROM_CAN(CDC_LOCK)) {
2282 int ret = cdi->ops->lock_door(cdi, 0);
2287 return cdi->ops->tray_move(cdi, 1);
2290 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2292 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2294 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2296 return cdi->ops->tray_move(cdi, 0);
2299 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2302 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2304 if (!CDROM_CAN(CDC_OPEN_TRAY))
2306 if (cdi->keeplocked)
2309 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2311 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2315 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2318 struct cdrom_changer_info *info;
2321 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2323 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2326 /* cannot select disc or select current disc */
2327 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2328 return media_changed(cdi, 1);
2330 if (arg >= cdi->capacity)
2333 info = kmalloc(sizeof(*info), GFP_KERNEL);
2337 ret = cdrom_read_mech_status(cdi, info);
2339 ret = info->slots[arg].change;
2345 * Media change detection with timing information.
2347 * arg is a pointer to a cdrom_timed_media_change_info struct.
2348 * arg->last_media_change may be set by calling code to signal
2349 * the timestamp (in ms) of the last known media change (by the caller).
2350 * Upon successful return, ioctl call will set arg->last_media_change
2351 * to the latest media change timestamp known by the kernel/driver
2352 * and set arg->has_changed to 1 if that timestamp is more recent
2353 * than the timestamp set by the caller.
2355 static int cdrom_ioctl_timed_media_change(struct cdrom_device_info *cdi,
2359 struct cdrom_timed_media_change_info __user *info;
2360 struct cdrom_timed_media_change_info tmp_info;
2362 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2365 info = (struct cdrom_timed_media_change_info __user *)arg;
2366 cd_dbg(CD_DO_IOCTL, "entering CDROM_TIMED_MEDIA_CHANGE\n");
2368 ret = cdrom_ioctl_media_changed(cdi, CDSL_CURRENT);
2372 if (copy_from_user(&tmp_info, info, sizeof(tmp_info)) != 0)
2375 tmp_info.media_flags = 0;
2376 if (tmp_info.last_media_change - cdi->last_media_change_ms < 0)
2377 tmp_info.media_flags |= MEDIA_CHANGED_FLAG;
2379 tmp_info.last_media_change = cdi->last_media_change_ms;
2381 if (copy_to_user(info, &tmp_info, sizeof(*info)) != 0)
2387 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2390 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2393 * Options need to be in sync with capability.
2394 * Too late for that, so we have to check each one separately.
2397 case CDO_USE_FFLAGS:
2398 case CDO_CHECK_TYPE:
2401 if (!CDROM_CAN(CDC_LOCK))
2405 return cdi->options;
2406 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2408 if (!CDROM_CAN(arg))
2411 cdi->options |= (int) arg;
2412 return cdi->options;
2415 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2418 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2420 cdi->options &= ~(int) arg;
2421 return cdi->options;
2424 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2427 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2429 if (!CDROM_CAN(CDC_SELECT_SPEED))
2431 return cdi->ops->select_speed(cdi, arg);
2434 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2437 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2439 if (!CDROM_CAN(CDC_SELECT_DISC))
2442 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2443 if (arg >= cdi->capacity)
2448 * ->select_disc is a hook to allow a driver-specific way of
2449 * seleting disc. However, since there is no equivalent hook for
2450 * cdrom_slot_status this may not actually be useful...
2452 if (cdi->ops->select_disc)
2453 return cdi->ops->select_disc(cdi, arg);
2455 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2456 return cdrom_select_disc(cdi, arg);
2459 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2460 struct block_device *bdev)
2462 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2464 if (!capable(CAP_SYS_ADMIN))
2466 if (!CDROM_CAN(CDC_RESET))
2468 invalidate_bdev(bdev);
2469 return cdi->ops->reset(cdi);
2472 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2475 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2477 if (!CDROM_CAN(CDC_LOCK))
2478 return -EDRIVE_CANT_DO_THIS;
2480 cdi->keeplocked = arg ? 1 : 0;
2483 * Don't unlock the door on multiple opens by default, but allow
2486 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2488 return cdi->ops->lock_door(cdi, arg);
2491 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2494 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2496 if (!capable(CAP_SYS_ADMIN))
2498 debug = arg ? 1 : 0;
2502 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2504 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2505 return (cdi->ops->capability & ~cdi->mask);
2509 * The following function is implemented, although very few audio
2510 * discs give Universal Product Code information, which should just be
2511 * the Medium Catalog Number on the box. Note, that the way the code
2512 * is written on the CD is /not/ uniform across all discs!
2514 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2517 struct cdrom_mcn mcn;
2520 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2522 if (!(cdi->ops->capability & CDC_MCN))
2524 ret = cdi->ops->get_mcn(cdi, &mcn);
2528 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2530 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2534 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2537 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2539 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2541 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2542 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2543 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2544 if (arg >= cdi->capacity)
2546 return cdrom_slot_status(cdi, arg);
2550 * Ok, this is where problems start. The current interface for the
2551 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2552 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2553 * is often the case, it is also very common for CDs to have some tracks
2554 * with data, and some tracks with audio. Just because I feel like it,
2555 * I declare the following to be the best way to cope. If the CD has ANY
2556 * data tracks on it, it will be returned as a data CD. If it has any XA
2557 * tracks, I will return it as that. Now I could simplify this interface
2558 * by combining these returns with the above, but this more clearly
2559 * demonstrates the problem with the current interface. Too bad this
2560 * wasn't designed to use bitmasks... -Erik
2562 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2563 * User level programmers might feel the ioctl is not very useful.
2566 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2570 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2572 cdrom_count_tracks(cdi, &tracks);
2574 return tracks.error;
2576 /* Policy mode on */
2577 if (tracks.audio > 0) {
2578 if (!tracks.data && !tracks.cdi && !tracks.xa)
2588 if (tracks.data > 0)
2590 /* Policy mode off */
2592 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2596 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2598 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2599 return cdi->capacity;
2602 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2605 struct cdrom_subchnl q;
2609 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2611 if (copy_from_user(&q, argp, sizeof(q)))
2614 requested = q.cdsc_format;
2615 if (requested != CDROM_MSF && requested != CDROM_LBA)
2617 q.cdsc_format = CDROM_MSF;
2619 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2623 back = q.cdsc_format; /* local copy */
2624 sanitize_format(&q.cdsc_absaddr, &back, requested);
2625 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2627 if (copy_to_user(argp, &q, sizeof(q)))
2629 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2633 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2636 struct cdrom_tochdr header;
2639 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2641 if (copy_from_user(&header, argp, sizeof(header)))
2644 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2648 if (copy_to_user(argp, &header, sizeof(header)))
2650 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2654 int cdrom_read_tocentry(struct cdrom_device_info *cdi,
2655 struct cdrom_tocentry *entry)
2657 u8 requested_format = entry->cdte_format;
2660 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2663 /* make interface to low-level uniform */
2664 entry->cdte_format = CDROM_MSF;
2665 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
2667 sanitize_format(&entry->cdte_addr, &entry->cdte_format,
2671 EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
2673 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2676 struct cdrom_tocentry entry;
2679 if (copy_from_user(&entry, argp, sizeof(entry)))
2681 ret = cdrom_read_tocentry(cdi, &entry);
2682 if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
2687 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2690 struct cdrom_msf msf;
2692 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2694 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2696 if (copy_from_user(&msf, argp, sizeof(msf)))
2698 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2701 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2707 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2709 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2711 if (copy_from_user(&ti, argp, sizeof(ti)))
2714 ret = check_for_audio_disc(cdi, cdi->ops);
2717 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2719 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2722 struct cdrom_volctrl volume;
2724 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2726 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2728 if (copy_from_user(&volume, argp, sizeof(volume)))
2730 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2733 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2736 struct cdrom_volctrl volume;
2739 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2741 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2744 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2748 if (copy_to_user(argp, &volume, sizeof(volume)))
2753 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2758 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2760 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2762 ret = check_for_audio_disc(cdi, cdi->ops);
2765 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2769 * Required when we need to use READ_10 to issue other than 2048 block
2772 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2774 const struct cdrom_device_ops *cdo = cdi->ops;
2775 struct packet_command cgc;
2776 struct modesel_head mh;
2778 memset(&mh, 0, sizeof(mh));
2779 mh.block_desc_length = 0x08;
2780 mh.block_length_med = (size >> 8) & 0xff;
2781 mh.block_length_lo = size & 0xff;
2783 memset(&cgc, 0, sizeof(cgc));
2785 cgc.cmd[1] = 1 << 4;
2787 cgc.buflen = sizeof(mh);
2788 cgc.buffer = (char *) &mh;
2789 cgc.data_direction = CGC_DATA_WRITE;
2790 mh.block_desc_length = 0x08;
2791 mh.block_length_med = (size >> 8) & 0xff;
2792 mh.block_length_lo = size & 0xff;
2794 return cdo->generic_packet(cdi, &cgc);
2797 static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2798 __u16 track, __u8 type, track_information *ti)
2800 const struct cdrom_device_ops *cdo = cdi->ops;
2801 struct packet_command cgc;
2804 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2805 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2806 cgc.cmd[1] = type & 3;
2807 cgc.cmd[4] = (track & 0xff00) >> 8;
2808 cgc.cmd[5] = track & 0xff;
2812 ret = cdo->generic_packet(cdi, &cgc);
2816 buflen = be16_to_cpu(ti->track_information_length) +
2817 sizeof(ti->track_information_length);
2819 if (buflen > sizeof(track_information))
2820 buflen = sizeof(track_information);
2822 cgc.cmd[8] = cgc.buflen = buflen;
2823 ret = cdo->generic_packet(cdi, &cgc);
2827 /* return actual fill size */
2831 /* return the last written block on the CD-R media. this is for the udf
2833 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2835 struct cdrom_tocentry toc;
2836 disc_information di;
2837 track_information ti;
2839 int ret = -1, ti_size;
2841 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2844 ret = cdrom_get_disc_info(cdi, &di);
2845 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2846 + sizeof(di.last_track_lsb)))
2849 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2850 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2851 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2852 if (ti_size < (int)offsetof(typeof(ti), track_start))
2855 /* if this track is blank, try the previous. */
2857 if (last_track == 1)
2860 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2863 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2864 + sizeof(ti.track_size)))
2867 /* if last recorded field is valid, return it. */
2868 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2869 + sizeof(ti.last_rec_address))) {
2870 *last_written = be32_to_cpu(ti.last_rec_address);
2872 /* make it up instead */
2873 *last_written = be32_to_cpu(ti.track_start) +
2874 be32_to_cpu(ti.track_size);
2876 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2880 /* this is where we end up if the drive either can't do a
2881 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2882 it doesn't give enough information or fails. then we return
2883 the toc contents. */
2885 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2888 toc.cdte_format = CDROM_MSF;
2889 toc.cdte_track = CDROM_LEADOUT;
2890 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2892 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2893 *last_written = toc.cdte_addr.lba;
2897 /* return the next writable block. also for udf file system. */
2898 static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2899 long *next_writable)
2901 disc_information di;
2902 track_information ti;
2906 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2907 goto use_last_written;
2909 ret = cdrom_get_disc_info(cdi, &di);
2910 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2911 + sizeof(di.last_track_lsb))
2912 goto use_last_written;
2914 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2915 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2916 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2917 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2918 goto use_last_written;
2920 /* if this track is blank, try the previous. */
2922 if (last_track == 1)
2923 goto use_last_written;
2925 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2927 goto use_last_written;
2930 /* if next recordable address field is valid, use it. */
2931 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2932 + sizeof(ti.next_writable)) {
2933 *next_writable = be32_to_cpu(ti.next_writable);
2938 ret = cdrom_get_last_written(cdi, next_writable);
2943 *next_writable += 7;
2948 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2950 struct packet_command *cgc,
2953 struct scsi_sense_hdr sshdr;
2954 struct cdrom_msf msf;
2955 int blocksize = 0, format = 0, lba;
2960 blocksize = CD_FRAMESIZE_RAW;
2962 case CDROMREADMODE1:
2963 blocksize = CD_FRAMESIZE;
2966 case CDROMREADMODE2:
2967 blocksize = CD_FRAMESIZE_RAW0;
2970 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2972 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2973 /* FIXME: we need upper bound checking, too!! */
2977 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2978 if (cgc->buffer == NULL)
2981 memset(&sshdr, 0, sizeof(sshdr));
2982 cgc->sshdr = &sshdr;
2983 cgc->data_direction = CGC_DATA_READ;
2984 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2985 if (ret && sshdr.sense_key == 0x05 &&
2986 sshdr.asc == 0x20 &&
2987 sshdr.ascq == 0x00) {
2989 * SCSI-II devices are not required to support
2990 * READ_CD, so let's try switching block size
2992 if (blocksize != CD_FRAMESIZE) {
2993 ret = cdrom_switch_blocksize(cdi, blocksize);
2998 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2999 if (blocksize != CD_FRAMESIZE)
3000 ret |= cdrom_switch_blocksize(cdi, CD_FRAMESIZE);
3002 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3009 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3012 struct cdrom_read_audio ra;
3015 #ifdef CONFIG_COMPAT
3016 if (in_compat_syscall()) {
3017 struct compat_cdrom_read_audio {
3018 union cdrom_addr addr;
3020 compat_int_t nframes;
3024 if (copy_from_user(&ra32, arg, sizeof(ra32)))
3027 ra = (struct cdrom_read_audio) {
3029 .addr_format = ra32.addr_format,
3030 .nframes = ra32.nframes,
3031 .buf = compat_ptr(ra32.buf),
3036 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3041 if (ra.addr_format == CDROM_MSF)
3042 lba = msf_to_lba(ra.addr.msf.minute,
3045 else if (ra.addr_format == CDROM_LBA)
3050 /* FIXME: we need upper bound checking, too!! */
3051 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3054 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3057 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3061 struct cdrom_subchnl q;
3062 u_char requested, back;
3063 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3065 requested = q.cdsc_format;
3066 if (!((requested == CDROM_MSF) ||
3067 (requested == CDROM_LBA)))
3070 ret = cdrom_read_subchannel(cdi, &q, 0);
3073 back = q.cdsc_format; /* local copy */
3074 sanitize_format(&q.cdsc_absaddr, &back, requested);
3075 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3076 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3078 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3082 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3084 struct packet_command *cgc)
3086 const struct cdrom_device_ops *cdo = cdi->ops;
3087 struct cdrom_msf msf;
3088 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3089 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3091 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3092 cgc->cmd[3] = msf.cdmsf_min0;
3093 cgc->cmd[4] = msf.cdmsf_sec0;
3094 cgc->cmd[5] = msf.cdmsf_frame0;
3095 cgc->cmd[6] = msf.cdmsf_min1;
3096 cgc->cmd[7] = msf.cdmsf_sec1;
3097 cgc->cmd[8] = msf.cdmsf_frame1;
3098 cgc->data_direction = CGC_DATA_NONE;
3099 return cdo->generic_packet(cdi, cgc);
3102 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3104 struct packet_command *cgc)
3106 const struct cdrom_device_ops *cdo = cdi->ops;
3107 struct cdrom_blk blk;
3108 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3109 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3111 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3112 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3113 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3114 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3115 cgc->cmd[5] = blk.from & 0xff;
3116 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3117 cgc->cmd[8] = blk.len & 0xff;
3118 cgc->data_direction = CGC_DATA_NONE;
3119 return cdo->generic_packet(cdi, cgc);
3122 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3124 struct packet_command *cgc,
3127 struct cdrom_volctrl volctrl;
3128 unsigned char buffer[32];
3129 char mask[sizeof(buffer)];
3130 unsigned short offset;
3133 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3135 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3139 cgc->buffer = buffer;
3141 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3145 /* originally the code depended on buffer[1] to determine
3146 how much data is available for transfer. buffer[1] is
3147 unfortunately ambigious and the only reliable way seem
3148 to be to simply skip over the block descriptor... */
3149 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3151 if (offset + 16 > sizeof(buffer))
3154 if (offset + 16 > cgc->buflen) {
3155 cgc->buflen = offset + 16;
3156 ret = cdrom_mode_sense(cdi, cgc,
3157 GPMODE_AUDIO_CTL_PAGE, 0);
3163 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3164 buffer[offset + 1] < 14)
3167 /* now we have the current volume settings. if it was only
3168 a CDROMVOLREAD, return these values */
3169 if (cmd == CDROMVOLREAD) {
3170 volctrl.channel0 = buffer[offset+9];
3171 volctrl.channel1 = buffer[offset+11];
3172 volctrl.channel2 = buffer[offset+13];
3173 volctrl.channel3 = buffer[offset+15];
3174 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3180 /* get the volume mask */
3182 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3186 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3187 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3188 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3189 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3192 cgc->buffer = buffer + offset - 8;
3193 memset(cgc->buffer, 0, 8);
3194 return cdrom_mode_select(cdi, cgc);
3197 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3198 struct packet_command *cgc,
3201 const struct cdrom_device_ops *cdo = cdi->ops;
3202 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3203 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3205 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3206 cgc->data_direction = CGC_DATA_NONE;
3207 return cdo->generic_packet(cdi, cgc);
3210 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3211 struct packet_command *cgc,
3214 const struct cdrom_device_ops *cdo = cdi->ops;
3215 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3216 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3217 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3218 cgc->data_direction = CGC_DATA_NONE;
3219 return cdo->generic_packet(cdi, cgc);
3222 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3224 struct packet_command *cgc)
3228 int size = sizeof(dvd_struct);
3230 if (!CDROM_CAN(CDC_DVD))
3233 s = memdup_user(arg, size);
3237 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3239 ret = dvd_read_struct(cdi, s, cgc);
3243 if (copy_to_user(arg, s, size))
3250 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3255 if (!CDROM_CAN(CDC_DVD))
3257 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3258 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3260 ret = dvd_do_auth(cdi, &ai);
3263 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3268 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3273 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3274 ret = cdrom_get_next_writable(cdi, &next);
3277 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3282 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3287 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3288 ret = cdrom_get_last_written(cdi, &last);
3291 if (in_compat_syscall())
3292 return put_user(last, (__s32 __user *)arg);
3294 return put_user(last, (long __user *)arg);
3297 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3300 struct packet_command cgc;
3301 void __user *userptr = (void __user *)arg;
3303 memset(&cgc, 0, sizeof(cgc));
3305 /* build a unified command and queue it through
3306 cdo->generic_packet() */
3309 case CDROMREADMODE1:
3310 case CDROMREADMODE2:
3311 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3312 case CDROMREADAUDIO:
3313 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3315 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3317 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3319 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3322 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3325 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3328 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3329 case DVD_READ_STRUCT:
3330 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3332 return mmc_ioctl_dvd_auth(cdi, userptr);
3333 case CDROM_NEXT_WRITABLE:
3334 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3335 case CDROM_LAST_WRITTEN:
3336 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3343 * Just about every imaginable ioctl is supported in the Uniform layer
3345 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3347 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3348 fmode_t mode, unsigned int cmd, unsigned long arg)
3350 void __user *argp = (void __user *)arg;
3354 case CDROMMULTISESSION:
3355 return cdrom_ioctl_multisession(cdi, argp);
3357 return cdrom_ioctl_eject(cdi);
3358 case CDROMCLOSETRAY:
3359 return cdrom_ioctl_closetray(cdi);
3361 return cdrom_ioctl_eject_sw(cdi, arg);
3362 case CDROM_MEDIA_CHANGED:
3363 return cdrom_ioctl_media_changed(cdi, arg);
3364 case CDROM_TIMED_MEDIA_CHANGE:
3365 return cdrom_ioctl_timed_media_change(cdi, arg);
3366 case CDROM_SET_OPTIONS:
3367 return cdrom_ioctl_set_options(cdi, arg);
3368 case CDROM_CLEAR_OPTIONS:
3369 return cdrom_ioctl_clear_options(cdi, arg);
3370 case CDROM_SELECT_SPEED:
3371 return cdrom_ioctl_select_speed(cdi, arg);
3372 case CDROM_SELECT_DISC:
3373 return cdrom_ioctl_select_disc(cdi, arg);
3375 return cdrom_ioctl_reset(cdi, bdev);
3376 case CDROM_LOCKDOOR:
3377 return cdrom_ioctl_lock_door(cdi, arg);
3379 return cdrom_ioctl_debug(cdi, arg);
3380 case CDROM_GET_CAPABILITY:
3381 return cdrom_ioctl_get_capability(cdi);
3383 return cdrom_ioctl_get_mcn(cdi, argp);
3384 case CDROM_DRIVE_STATUS:
3385 return cdrom_ioctl_drive_status(cdi, arg);
3386 case CDROM_DISC_STATUS:
3387 return cdrom_ioctl_disc_status(cdi);
3388 case CDROM_CHANGER_NSLOTS:
3389 return cdrom_ioctl_changer_nslots(cdi);
3393 * Use the ioctls that are implemented through the generic_packet()
3394 * interface. this may look at bit funny, but if -ENOTTY is
3395 * returned that particular ioctl is not implemented and we
3396 * let it go through the device specific ones.
3398 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3399 ret = mmc_ioctl(cdi, cmd, arg);
3405 * Note: most of the cd_dbg() calls are commented out here,
3406 * because they fill up the sys log when CD players poll
3411 return cdrom_ioctl_get_subchnl(cdi, argp);
3412 case CDROMREADTOCHDR:
3413 return cdrom_ioctl_read_tochdr(cdi, argp);
3414 case CDROMREADTOCENTRY:
3415 return cdrom_ioctl_read_tocentry(cdi, argp);
3417 return cdrom_ioctl_play_msf(cdi, argp);
3418 case CDROMPLAYTRKIND:
3419 return cdrom_ioctl_play_trkind(cdi, argp);
3421 return cdrom_ioctl_volctrl(cdi, argp);
3423 return cdrom_ioctl_volread(cdi, argp);
3428 return cdrom_ioctl_audioctl(cdi, cmd);
3434 EXPORT_SYMBOL(cdrom_get_last_written);
3435 EXPORT_SYMBOL(register_cdrom);
3436 EXPORT_SYMBOL(unregister_cdrom);
3437 EXPORT_SYMBOL(cdrom_open);
3438 EXPORT_SYMBOL(cdrom_release);
3439 EXPORT_SYMBOL(cdrom_ioctl);
3440 EXPORT_SYMBOL(cdrom_number_of_slots);
3441 EXPORT_SYMBOL(cdrom_mode_select);
3442 EXPORT_SYMBOL(cdrom_mode_sense);
3443 EXPORT_SYMBOL(init_cdrom_command);
3444 EXPORT_SYMBOL(cdrom_get_media_event);
3446 #ifdef CONFIG_SYSCTL
3448 #define CDROM_STR_SIZE 1000
3450 static struct cdrom_sysctl_settings {
3451 char info[CDROM_STR_SIZE]; /* general info */
3452 int autoclose; /* close tray upon mount, etc */
3453 int autoeject; /* eject on umount */
3454 int debug; /* turn on debugging messages */
3455 int lock; /* lock the door on device open */
3456 int check; /* check media type */
3457 } cdrom_sysctl_settings;
3459 enum cdrom_print_option {
3466 static int cdrom_print_info(const char *header, int val, char *info,
3467 int *pos, enum cdrom_print_option option)
3469 const int max_size = sizeof(cdrom_sysctl_settings.info);
3470 struct cdrom_device_info *cdi;
3473 ret = scnprintf(info + *pos, max_size - *pos, header);
3479 list_for_each_entry(cdi, &cdrom_list, list) {
3482 ret = scnprintf(info + *pos, max_size - *pos,
3486 ret = scnprintf(info + *pos, max_size - *pos,
3487 "\t%d", cdi->speed);
3490 ret = scnprintf(info + *pos, max_size - *pos,
3491 "\t%d", cdi->capacity);
3493 case CTL_CAPABILITY:
3494 ret = scnprintf(info + *pos, max_size - *pos,
3495 "\t%d", CDROM_CAN(val) != 0);
3498 pr_info("invalid option%d\n", option);
3509 static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3510 void *buffer, size_t *lenp, loff_t *ppos)
3513 char *info = cdrom_sysctl_settings.info;
3514 const int max_size = sizeof(cdrom_sysctl_settings.info);
3516 if (!*lenp || (*ppos && !write)) {
3521 mutex_lock(&cdrom_mutex);
3523 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3525 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3527 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3529 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3531 if (cdrom_print_info("\nCan close tray:\t",
3532 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3534 if (cdrom_print_info("\nCan open tray:\t",
3535 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3537 if (cdrom_print_info("\nCan lock tray:\t",
3538 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3540 if (cdrom_print_info("\nCan change speed:",
3541 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3543 if (cdrom_print_info("\nCan select disk:",
3544 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3546 if (cdrom_print_info("\nCan read multisession:",
3547 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3549 if (cdrom_print_info("\nCan read MCN:\t",
3550 CDC_MCN, info, &pos, CTL_CAPABILITY))
3552 if (cdrom_print_info("\nReports media changed:",
3553 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3555 if (cdrom_print_info("\nCan play audio:\t",
3556 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3558 if (cdrom_print_info("\nCan write CD-R:\t",
3559 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3561 if (cdrom_print_info("\nCan write CD-RW:",
3562 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3564 if (cdrom_print_info("\nCan read DVD:\t",
3565 CDC_DVD, info, &pos, CTL_CAPABILITY))
3567 if (cdrom_print_info("\nCan write DVD-R:",
3568 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3570 if (cdrom_print_info("\nCan write DVD-RAM:",
3571 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3573 if (cdrom_print_info("\nCan read MRW:\t",
3574 CDC_MRW, info, &pos, CTL_CAPABILITY))
3576 if (cdrom_print_info("\nCan write MRW:\t",
3577 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3579 if (cdrom_print_info("\nCan write RAM:\t",
3580 CDC_RAM, info, &pos, CTL_CAPABILITY))
3582 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3585 mutex_unlock(&cdrom_mutex);
3586 return proc_dostring(ctl, write, buffer, lenp, ppos);
3588 pr_info("info buffer too small\n");
3592 /* Unfortunately, per device settings are not implemented through
3593 procfs/sysctl yet. When they are, this will naturally disappear. For now
3594 just update all drives. Later this will become the template on which
3595 new registered drives will be based. */
3596 static void cdrom_update_settings(void)
3598 struct cdrom_device_info *cdi;
3600 mutex_lock(&cdrom_mutex);
3601 list_for_each_entry(cdi, &cdrom_list, list) {
3602 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3603 cdi->options |= CDO_AUTO_CLOSE;
3604 else if (!autoclose)
3605 cdi->options &= ~CDO_AUTO_CLOSE;
3606 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3607 cdi->options |= CDO_AUTO_EJECT;
3608 else if (!autoeject)
3609 cdi->options &= ~CDO_AUTO_EJECT;
3610 if (lockdoor && CDROM_CAN(CDC_LOCK))
3611 cdi->options |= CDO_LOCK;
3613 cdi->options &= ~CDO_LOCK;
3614 if (check_media_type)
3615 cdi->options |= CDO_CHECK_TYPE;
3617 cdi->options &= ~CDO_CHECK_TYPE;
3619 mutex_unlock(&cdrom_mutex);
3622 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3623 void *buffer, size_t *lenp, loff_t *ppos)
3627 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3631 /* we only care for 1 or 0. */
3632 autoclose = !!cdrom_sysctl_settings.autoclose;
3633 autoeject = !!cdrom_sysctl_settings.autoeject;
3634 debug = !!cdrom_sysctl_settings.debug;
3635 lockdoor = !!cdrom_sysctl_settings.lock;
3636 check_media_type = !!cdrom_sysctl_settings.check;
3638 /* update the option flags according to the changes. we
3639 don't have per device options through sysctl yet,
3640 but we will have and then this will disappear. */
3641 cdrom_update_settings();
3647 /* Place files in /proc/sys/dev/cdrom */
3648 static struct ctl_table cdrom_table[] = {
3651 .data = &cdrom_sysctl_settings.info,
3652 .maxlen = CDROM_STR_SIZE,
3654 .proc_handler = cdrom_sysctl_info,
3657 .procname = "autoclose",
3658 .data = &cdrom_sysctl_settings.autoclose,
3659 .maxlen = sizeof(int),
3661 .proc_handler = cdrom_sysctl_handler,
3664 .procname = "autoeject",
3665 .data = &cdrom_sysctl_settings.autoeject,
3666 .maxlen = sizeof(int),
3668 .proc_handler = cdrom_sysctl_handler,
3671 .procname = "debug",
3672 .data = &cdrom_sysctl_settings.debug,
3673 .maxlen = sizeof(int),
3675 .proc_handler = cdrom_sysctl_handler,
3679 .data = &cdrom_sysctl_settings.lock,
3680 .maxlen = sizeof(int),
3682 .proc_handler = cdrom_sysctl_handler,
3685 .procname = "check_media",
3686 .data = &cdrom_sysctl_settings.check,
3687 .maxlen = sizeof(int),
3689 .proc_handler = cdrom_sysctl_handler
3693 static struct ctl_table_header *cdrom_sysctl_header;
3695 static void cdrom_sysctl_register(void)
3697 static atomic_t initialized = ATOMIC_INIT(0);
3699 if (!atomic_add_unless(&initialized, 1, 1))
3702 cdrom_sysctl_header = register_sysctl("dev/cdrom", cdrom_table);
3704 /* set the defaults */
3705 cdrom_sysctl_settings.autoclose = autoclose;
3706 cdrom_sysctl_settings.autoeject = autoeject;
3707 cdrom_sysctl_settings.debug = debug;
3708 cdrom_sysctl_settings.lock = lockdoor;
3709 cdrom_sysctl_settings.check = check_media_type;
3712 static void cdrom_sysctl_unregister(void)
3714 if (cdrom_sysctl_header)
3715 unregister_sysctl_table(cdrom_sysctl_header);
3718 #else /* CONFIG_SYSCTL */
3720 static void cdrom_sysctl_register(void)
3724 static void cdrom_sysctl_unregister(void)
3728 #endif /* CONFIG_SYSCTL */
3730 static int __init cdrom_init(void)
3732 cdrom_sysctl_register();
3737 static void __exit cdrom_exit(void)
3739 pr_info("Uniform CD-ROM driver unloaded\n");
3740 cdrom_sysctl_unregister();
3743 module_init(cdrom_init);
3744 module_exit(cdrom_exit);
3745 MODULE_LICENSE("GPL");