1 /* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
18 ----------------------------------
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
57 -- Simplified some complex logic so that the source code is easier to read.
59 -- Other stuff I probably forgot to mention (lots of changes).
61 2.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
121 -- proc info didn't mask against capabilities mask.
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
144 -- Fix up ioctl handling so the device specific ones actually get
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
243 -------------------------------------------------------------------------*/
245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
247 #define REVISION "Revision: 3.20"
248 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
250 /* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252 #define CD_NOTHING 0x0
253 #define CD_WARNING 0x1
254 #define CD_REG_UNREG 0x2
255 #define CD_DO_IOCTL 0x4
257 #define CD_CLOSE 0x10
258 #define CD_COUNT_TRACKS 0x20
259 #define CD_CHANGER 0x40
262 /* Define this to remove _all_ the debugging messages */
263 /* #define ERRLOGMASK CD_NOTHING */
264 #define ERRLOGMASK CD_WARNING
265 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
268 #include <linux/module.h>
269 #include <linux/fs.h>
270 #include <linux/major.h>
271 #include <linux/types.h>
272 #include <linux/errno.h>
273 #include <linux/kernel.h>
274 #include <linux/mm.h>
275 #include <linux/slab.h>
276 #include <linux/cdrom.h>
277 #include <linux/sysctl.h>
278 #include <linux/proc_fs.h>
279 #include <linux/blkpg.h>
280 #include <linux/init.h>
281 #include <linux/fcntl.h>
282 #include <linux/blkdev.h>
283 #include <linux/times.h>
284 #include <linux/uaccess.h>
285 #include <scsi/scsi_request.h>
287 /* used to tell the module to turn on full debugging messages */
289 /* default compatibility mode */
290 static bool autoclose=1;
291 static bool autoeject;
292 static bool lockdoor = 1;
293 /* will we ever get to use this... sigh. */
294 static bool check_media_type;
295 /* automatically restart mrw format */
296 static bool mrw_format_restart = 1;
297 module_param(debug, bool, 0);
298 module_param(autoclose, bool, 0);
299 module_param(autoeject, bool, 0);
300 module_param(lockdoor, bool, 0);
301 module_param(check_media_type, bool, 0);
302 module_param(mrw_format_restart, bool, 0);
304 static DEFINE_MUTEX(cdrom_mutex);
306 static const char *mrw_format_status[] = {
313 static const char *mrw_address_space[] = { "DMA", "GAA" };
315 #if (ERRLOGMASK != CD_NOTHING)
316 #define cd_dbg(type, fmt, ...) \
318 if ((ERRLOGMASK & type) || debug == 1) \
319 pr_debug(fmt, ##__VA_ARGS__); \
322 #define cd_dbg(type, fmt, ...) \
324 if (0 && (ERRLOGMASK & type) || debug == 1) \
325 pr_debug(fmt, ##__VA_ARGS__); \
329 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
330 a lot of places. This macro makes the code more clear. */
331 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
334 * Another popular OS uses 7 seconds as the hard timeout for default
335 * commands, so it is a good choice for us as well.
337 #define CDROM_DEF_TIMEOUT (7 * HZ)
339 /* Not-exported routines. */
341 static void cdrom_sysctl_register(void);
343 static LIST_HEAD(cdrom_list);
345 int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
346 struct packet_command *cgc)
349 cgc->sense->sense_key = 0x05;
350 cgc->sense->asc = 0x20;
351 cgc->sense->ascq = 0x00;
357 EXPORT_SYMBOL(cdrom_dummy_generic_packet);
359 static int cdrom_flush_cache(struct cdrom_device_info *cdi)
361 struct packet_command cgc;
363 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
364 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
366 cgc.timeout = 5 * 60 * HZ;
368 return cdi->ops->generic_packet(cdi, &cgc);
371 /* requires CD R/RW */
372 static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
373 disc_information *di)
375 const struct cdrom_device_ops *cdo = cdi->ops;
376 struct packet_command cgc;
379 /* set up command and get the disc info */
380 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
381 cgc.cmd[0] = GPCMD_READ_DISC_INFO;
382 cgc.cmd[8] = cgc.buflen = 2;
385 ret = cdo->generic_packet(cdi, &cgc);
389 /* not all drives have the same disc_info length, so requeue
390 * packet with the length the drive tells us it can supply
392 buflen = be16_to_cpu(di->disc_information_length) +
393 sizeof(di->disc_information_length);
395 if (buflen > sizeof(disc_information))
396 buflen = sizeof(disc_information);
398 cgc.cmd[8] = cgc.buflen = buflen;
399 ret = cdo->generic_packet(cdi, &cgc);
403 /* return actual fill size */
407 /* This macro makes sure we don't have to check on cdrom_device_ops
408 * existence in the run-time routines below. Change_capability is a
409 * hack to have the capability flags defined const, while we can still
410 * change it here without gcc complaining at every line.
412 #define ENSURE(call, bits) \
414 if (cdo->call == NULL) \
415 *change_capability &= ~(bits); \
419 * the first prototypes used 0x2c as the page code for the mrw mode page,
420 * subsequently this was changed to 0x03. probe the one used by this drive
422 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
424 struct packet_command cgc;
427 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
432 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
433 cdi->mrw_mode_page = MRW_MODE_PC;
435 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
436 cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
443 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
445 struct packet_command cgc;
446 struct mrw_feature_desc *mfd;
447 unsigned char buffer[16];
452 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
454 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
455 cgc.cmd[3] = CDF_MRW;
456 cgc.cmd[8] = sizeof(buffer);
459 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
462 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
463 if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
467 if ((ret = cdrom_mrw_probe_pc(cdi))) {
475 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
477 struct packet_command cgc;
478 unsigned char buffer[12];
481 pr_info("%sstarting format\n", cont ? "Re" : "");
484 * FmtData bit set (bit 4), format type is 1
486 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
487 cgc.cmd[0] = GPCMD_FORMAT_UNIT;
488 cgc.cmd[1] = (1 << 4) | 1;
490 cgc.timeout = 5 * 60 * HZ;
493 * 4 byte format list header, 8 byte format list descriptor
506 buffer[8] = 0x24 << 2;
509 ret = cdi->ops->generic_packet(cdi, &cgc);
511 pr_info("bgformat failed\n");
516 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
518 struct packet_command cgc;
520 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
521 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
524 * Session = 1, Track = 0
526 cgc.cmd[1] = !!immed;
529 cgc.timeout = 5 * 60 * HZ;
531 return cdi->ops->generic_packet(cdi, &cgc);
534 static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
539 ret = cdrom_get_disc_info(cdi, &di);
540 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
544 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
545 pr_info("issuing MRW background format suspend\n");
546 ret = cdrom_mrw_bgformat_susp(cdi, 0);
549 if (!ret && cdi->media_written)
550 ret = cdrom_flush_cache(cdi);
555 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
557 struct packet_command cgc;
558 struct mode_page_header *mph;
560 int ret, offset, size;
562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
565 cgc.buflen = sizeof(buffer);
567 ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
571 mph = (struct mode_page_header *)buffer;
572 offset = be16_to_cpu(mph->desc_length);
573 size = be16_to_cpu(mph->mode_data_length) + 2;
575 buffer[offset + 3] = space;
578 ret = cdrom_mode_select(cdi, &cgc);
582 pr_info("%s: mrw address space %s selected\n",
583 cdi->name, mrw_address_space[space]);
587 int register_cdrom(struct cdrom_device_info *cdi)
589 static char banner_printed;
590 const struct cdrom_device_ops *cdo = cdi->ops;
591 int *change_capability = (int *)&cdo->capability; /* hack */
593 cd_dbg(CD_OPEN, "entering register_cdrom\n");
595 if (cdo->open == NULL || cdo->release == NULL)
597 if (!banner_printed) {
598 pr_info("Uniform CD-ROM driver " REVISION "\n");
600 cdrom_sysctl_register();
603 ENSURE(drive_status, CDC_DRIVE_STATUS);
604 if (cdo->check_events == NULL && cdo->media_changed == NULL)
605 *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
606 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
607 ENSURE(lock_door, CDC_LOCK);
608 ENSURE(select_speed, CDC_SELECT_SPEED);
609 ENSURE(get_last_session, CDC_MULTI_SESSION);
610 ENSURE(get_mcn, CDC_MCN);
611 ENSURE(reset, CDC_RESET);
612 ENSURE(generic_packet, CDC_GENERIC_PACKET);
614 cdi->options = CDO_USE_FFLAGS;
616 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
617 cdi->options |= (int) CDO_AUTO_CLOSE;
618 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
619 cdi->options |= (int) CDO_AUTO_EJECT;
621 cdi->options |= (int) CDO_LOCK;
622 if (check_media_type == 1)
623 cdi->options |= (int) CDO_CHECK_TYPE;
625 if (CDROM_CAN(CDC_MRW_W))
626 cdi->exit = cdrom_mrw_exit;
629 cdi->cdda_method = CDDA_BPC_FULL;
631 cdi->cdda_method = CDDA_OLD;
633 WARN_ON(!cdo->generic_packet);
635 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
636 mutex_lock(&cdrom_mutex);
637 list_add(&cdi->list, &cdrom_list);
638 mutex_unlock(&cdrom_mutex);
643 void unregister_cdrom(struct cdrom_device_info *cdi)
645 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
647 mutex_lock(&cdrom_mutex);
648 list_del(&cdi->list);
649 mutex_unlock(&cdrom_mutex);
654 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
657 int cdrom_get_media_event(struct cdrom_device_info *cdi,
658 struct media_event_desc *med)
660 struct packet_command cgc;
661 unsigned char buffer[8];
662 struct event_header *eh = (struct event_header *)buffer;
664 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
665 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
666 cgc.cmd[1] = 1; /* IMMED */
667 cgc.cmd[4] = 1 << 4; /* media event */
668 cgc.cmd[8] = sizeof(buffer);
671 if (cdi->ops->generic_packet(cdi, &cgc))
674 if (be16_to_cpu(eh->data_len) < sizeof(*med))
677 if (eh->nea || eh->notification_class != 0x4)
680 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
684 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
685 struct rwrt_feature_desc *rfd)
687 struct packet_command cgc;
691 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
693 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
694 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
695 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
698 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
701 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
705 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
707 struct packet_command cgc;
709 __be16 *feature_code;
712 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
714 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
715 cgc.cmd[3] = CDF_HWDM;
716 cgc.cmd[8] = sizeof(buffer);
719 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
722 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
723 if (be16_to_cpu(*feature_code) == CDF_HWDM)
730 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
732 struct rwrt_feature_desc rfd;
737 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
740 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
746 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
751 ret = cdrom_get_disc_info(cdi, &di);
752 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
759 * FIXME: check RO bit
761 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
763 int ret = cdrom_media_erasable(cdi);
766 * allow writable open if media info read worked and media is
767 * erasable, _or_ if it fails since not all drives support it
775 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
781 * always reset to DMA lba space on open
783 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
784 pr_err("failed setting lba address space\n");
788 ret = cdrom_get_disc_info(cdi, &di);
789 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
797 * 0 - not MRW formatted
798 * 1 - MRW bgformat started, but not running or complete
799 * 2 - MRW bgformat in progress
800 * 3 - MRW formatting complete
803 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
808 ret = cdrom_mrw_bgformat(cdi, 1);
813 static int mo_open_write(struct cdrom_device_info *cdi)
815 struct packet_command cgc;
819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
823 * obtain write protect information as per
824 * drivers/scsi/sd.c:sd_read_write_protect_flag
827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
835 /* drive gave us no info, let the user go ahead */
839 return buffer[3] & 0x80;
842 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
844 struct rwrt_feature_desc rfd;
847 if ((ret = cdrom_has_defect_mgt(cdi)))
850 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
855 cd_dbg(CD_OPEN, "can open for random write\n");
859 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
861 struct packet_command cgc;
863 int ret, mmc3_profile;
865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
873 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
874 mmc3_profile = 0xffff;
876 mmc3_profile = (buffer[6] << 8) | buffer[7];
878 cdi->mmc3_profile = mmc3_profile;
881 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
883 switch (cdi->mmc3_profile) {
884 case 0x12: /* DVD-RAM */
885 case 0x1A: /* DVD+RW */
886 case 0x43: /* BD-RE */
894 * returns 0 for ok to open write, non-0 to disallow
896 static int cdrom_open_write(struct cdrom_device_info *cdi)
898 int mrw, mrw_write, ram_write;
902 if (!cdrom_is_mrw(cdi, &mrw_write))
905 if (CDROM_CAN(CDC_MO_DRIVE))
908 (void) cdrom_is_random_writable(cdi, &ram_write);
911 cdi->mask &= ~CDC_MRW;
913 cdi->mask |= CDC_MRW;
916 cdi->mask &= ~CDC_MRW_W;
918 cdi->mask |= CDC_MRW_W;
921 cdi->mask &= ~CDC_RAM;
923 cdi->mask |= CDC_RAM;
925 if (CDROM_CAN(CDC_MRW_W))
926 ret = cdrom_mrw_open_write(cdi);
927 else if (CDROM_CAN(CDC_DVD_RAM))
928 ret = cdrom_dvdram_open_write(cdi);
929 else if (CDROM_CAN(CDC_RAM) &&
930 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
931 ret = cdrom_ram_open_write(cdi);
932 else if (CDROM_CAN(CDC_MO_DRIVE))
933 ret = mo_open_write(cdi);
934 else if (!cdrom_is_dvd_rw(cdi))
940 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
942 struct packet_command cgc;
944 if (cdi->mmc3_profile != 0x1a) {
945 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
949 if (!cdi->media_written) {
950 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
954 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
957 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
959 cdi->ops->generic_packet(cdi, &cgc);
961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
962 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
963 cgc.timeout = 3000*HZ;
965 cdi->ops->generic_packet(cdi, &cgc);
967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
968 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
969 cgc.cmd[2] = 2; /* Close session */
971 cgc.timeout = 3000*HZ;
972 cdi->ops->generic_packet(cdi, &cgc);
974 cdi->media_written = 0;
977 static int cdrom_close_write(struct cdrom_device_info *cdi)
980 return cdrom_flush_cache(cdi);
986 /* badly broken, I know. Is due for a fixup anytime. */
987 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
989 struct cdrom_tochdr header;
990 struct cdrom_tocentry entry;
997 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
998 /* Grab the TOC header so we can see how many tracks there are */
999 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1001 if (ret == -ENOMEDIUM)
1002 tracks->error = CDS_NO_DISC;
1004 tracks->error = CDS_NO_INFO;
1007 /* check what type of tracks are on this disc */
1008 entry.cdte_format = CDROM_MSF;
1009 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1010 entry.cdte_track = i;
1011 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1012 tracks->error = CDS_NO_INFO;
1015 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1016 if (entry.cdte_format == 0x10)
1018 else if (entry.cdte_format == 0x20)
1025 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1026 i, entry.cdte_format, entry.cdte_ctrl);
1028 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1029 header.cdth_trk1, tracks->audio, tracks->data,
1030 tracks->cdi, tracks->xa);
1034 int open_for_data(struct cdrom_device_info *cdi)
1037 const struct cdrom_device_ops *cdo = cdi->ops;
1039 cd_dbg(CD_OPEN, "entering open_for_data\n");
1040 /* Check if the driver can report drive status. If it can, we
1041 can do clever things. If it can't, well, we at least tried! */
1042 if (cdo->drive_status != NULL) {
1043 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1044 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1045 if (ret == CDS_TRAY_OPEN) {
1046 cd_dbg(CD_OPEN, "the tray is open...\n");
1047 /* can/may i close it? */
1048 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1049 cdi->options & CDO_AUTO_CLOSE) {
1050 cd_dbg(CD_OPEN, "trying to close the tray\n");
1051 ret=cdo->tray_move(cdi,0);
1053 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1054 /* Ignore the error from the low
1055 level driver. We don't care why it
1056 couldn't close the tray. We only care
1057 that there is no disc in the drive,
1058 since that is the _REAL_ problem here.*/
1060 goto clean_up_and_return;
1063 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1065 goto clean_up_and_return;
1067 /* Ok, the door should be closed now.. Check again */
1068 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1069 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1070 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1071 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1073 goto clean_up_and_return;
1075 cd_dbg(CD_OPEN, "the tray is now closed\n");
1077 /* the door should be closed now, check for the disc */
1078 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1079 if (ret!=CDS_DISC_OK) {
1081 goto clean_up_and_return;
1084 cdrom_count_tracks(cdi, &tracks);
1085 if (tracks.error == CDS_NO_DISC) {
1086 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1088 goto clean_up_and_return;
1090 /* CD-Players which don't use O_NONBLOCK, workman
1091 * for example, need bit CDO_CHECK_TYPE cleared! */
1092 if (tracks.data==0) {
1093 if (cdi->options & CDO_CHECK_TYPE) {
1094 /* give people a warning shot, now that CDO_CHECK_TYPE
1095 is the default case! */
1096 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1097 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1098 (unsigned int)task_pid_nr(current));
1100 goto clean_up_and_return;
1103 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1107 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1109 /* all seems well, we can open the device */
1110 ret = cdo->open(cdi, 0); /* open for data */
1111 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1112 /* After all this careful checking, we shouldn't have problems
1113 opening the device, but we don't want the device locked if
1114 this somehow fails... */
1116 cd_dbg(CD_OPEN, "open device failed\n");
1117 goto clean_up_and_return;
1119 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1120 cdo->lock_door(cdi, 1);
1121 cd_dbg(CD_OPEN, "door locked\n");
1123 cd_dbg(CD_OPEN, "device opened successfully\n");
1126 /* Something failed. Try to unlock the drive, because some drivers
1127 (notably ide-cd) lock the drive after every command. This produced
1128 a nasty bug where after mount failed, the drive would remain locked!
1129 This ensures that the drive gets unlocked after a mount fails. This
1130 is a goto to avoid bloating the driver with redundant code. */
1131 clean_up_and_return:
1132 cd_dbg(CD_OPEN, "open failed\n");
1133 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1134 cdo->lock_door(cdi, 0);
1135 cd_dbg(CD_OPEN, "door unlocked\n");
1140 /* We use the open-option O_NONBLOCK to indicate that the
1141 * purpose of opening is only for subsequent ioctl() calls; no device
1142 * integrity checks are performed.
1144 * We hope that all cd-player programs will adopt this convention. It
1145 * is in their own interest: device control becomes a lot easier
1148 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1153 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1155 /* if this was a O_NONBLOCK open and we should honor the flags,
1156 * do a quick open without drive/disc integrity checks. */
1158 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1159 ret = cdi->ops->open(cdi, 1);
1161 ret = open_for_data(cdi);
1164 cdrom_mmc3_profile(cdi);
1165 if (mode & FMODE_WRITE) {
1167 if (cdrom_open_write(cdi))
1169 if (!CDROM_CAN(CDC_RAM))
1172 cdi->media_written = 0;
1179 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1180 cdi->name, cdi->use_count);
1183 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1184 cdi->ops->lock_door(cdi, 0);
1185 cd_dbg(CD_OPEN, "door unlocked\n");
1187 cdi->ops->release(cdi);
1193 /* This code is similar to that in open_for_data. The routine is called
1194 whenever an audio play operation is requested.
1196 static int check_for_audio_disc(struct cdrom_device_info *cdi,
1197 const struct cdrom_device_ops *cdo)
1201 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1202 if (!(cdi->options & CDO_CHECK_TYPE))
1204 if (cdo->drive_status != NULL) {
1205 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1206 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1207 if (ret == CDS_TRAY_OPEN) {
1208 cd_dbg(CD_OPEN, "the tray is open...\n");
1209 /* can/may i close it? */
1210 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1211 cdi->options & CDO_AUTO_CLOSE) {
1212 cd_dbg(CD_OPEN, "trying to close the tray\n");
1213 ret=cdo->tray_move(cdi,0);
1215 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1216 /* Ignore the error from the low
1217 level driver. We don't care why it
1218 couldn't close the tray. We only care
1219 that there is no disc in the drive,
1220 since that is the _REAL_ problem here.*/
1224 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1227 /* Ok, the door should be closed now.. Check again */
1228 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1229 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1230 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1233 if (ret!=CDS_DISC_OK) {
1234 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1237 cd_dbg(CD_OPEN, "the tray is now closed\n");
1240 cdrom_count_tracks(cdi, &tracks);
1242 return(tracks.error);
1244 if (tracks.audio==0)
1245 return -EMEDIUMTYPE;
1250 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1252 const struct cdrom_device_ops *cdo = cdi->ops;
1253 int opened_for_data;
1255 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1257 if (cdi->use_count > 0)
1260 if (cdi->use_count == 0) {
1261 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1263 cdrom_dvd_rw_close_write(cdi);
1265 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1266 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1267 cdo->lock_door(cdi, 0);
1271 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1272 !(mode & FMODE_NDELAY);
1275 * flush cache on last write release
1277 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1278 cdrom_close_write(cdi);
1281 if (cdi->use_count == 0) { /* last process that closes dev*/
1282 if (opened_for_data &&
1283 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1284 cdo->tray_move(cdi, 1);
1288 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1289 struct cdrom_changer_info *buf)
1291 struct packet_command cgc;
1292 const struct cdrom_device_ops *cdo = cdi->ops;
1296 * Sanyo changer isn't spec compliant (doesn't use regular change
1297 * LOAD_UNLOAD command, and it doesn't implement the mech status
1300 if (cdi->sanyo_slot) {
1301 buf->hdr.nslots = 3;
1302 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1303 for (length = 0; length < 3; length++) {
1304 buf->slots[length].disc_present = 1;
1305 buf->slots[length].change = 0;
1310 length = sizeof(struct cdrom_mechstat_header) +
1311 cdi->capacity * sizeof(struct cdrom_slot);
1313 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1314 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1315 cgc.cmd[8] = (length >> 8) & 0xff;
1316 cgc.cmd[9] = length & 0xff;
1317 return cdo->generic_packet(cdi, &cgc);
1320 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1322 struct cdrom_changer_info *info;
1325 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1326 if (cdi->sanyo_slot)
1329 info = kmalloc(sizeof(*info), GFP_KERNEL);
1333 if ((ret = cdrom_read_mech_status(cdi, info)))
1336 if (info->slots[slot].disc_present)
1346 /* Return the number of slots for an ATAPI/SCSI cdrom,
1347 * return 1 if not a changer.
1349 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1353 struct cdrom_changer_info *info;
1355 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1356 /* cdrom_read_mech_status requires a valid value for capacity: */
1359 info = kmalloc(sizeof(*info), GFP_KERNEL);
1363 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1364 nslots = info->hdr.nslots;
1371 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1372 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1374 struct packet_command cgc;
1376 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1377 if (cdi->sanyo_slot && slot < 0)
1380 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1381 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1382 cgc.cmd[4] = 2 + (slot >= 0);
1384 cgc.timeout = 60 * HZ;
1386 /* The Sanyo 3 CD changer uses byte 7 of the
1387 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1388 using the GPCMD_LOAD_UNLOAD opcode. */
1389 if (cdi->sanyo_slot && -1 < slot) {
1390 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1392 cgc.cmd[4] = cgc.cmd[8] = 0;
1393 cdi->sanyo_slot = slot ? slot : 3;
1396 return cdi->ops->generic_packet(cdi, &cgc);
1399 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1401 struct cdrom_changer_info *info;
1405 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1406 if (!CDROM_CAN(CDC_SELECT_DISC))
1407 return -EDRIVE_CANT_DO_THIS;
1409 if (cdi->ops->check_events)
1410 cdi->ops->check_events(cdi, 0, slot);
1412 cdi->ops->media_changed(cdi, slot);
1414 if (slot == CDSL_NONE) {
1415 /* set media changed bits, on both queues */
1416 cdi->mc_flags = 0x3;
1417 return cdrom_load_unload(cdi, -1);
1420 info = kmalloc(sizeof(*info), GFP_KERNEL);
1424 if ((ret = cdrom_read_mech_status(cdi, info))) {
1429 curslot = info->hdr.curslot;
1432 if (cdi->use_count > 1 || cdi->keeplocked) {
1433 if (slot == CDSL_CURRENT) {
1440 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1441 which is useful if it had been previously unloaded.
1442 Whether it can or not, it returns the current slot.
1443 Similarly, if slot happens to be the current one, we still
1445 if (slot == CDSL_CURRENT)
1448 /* set media changed bits on both queues */
1449 cdi->mc_flags = 0x3;
1450 if ((ret = cdrom_load_unload(cdi, slot)))
1457 * As cdrom implements an extra ioctl consumer for media changed
1458 * event, it needs to buffer ->check_events() output, such that event
1459 * is not lost for both the usual VFS and ioctl paths.
1460 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1463 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1464 * called in parallel and buffering fields are accessed without any
1465 * exclusion. The original media_changed code had the same problem.
1466 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1467 * and remove this cruft altogether. It doesn't have much usefulness
1470 static void cdrom_update_events(struct cdrom_device_info *cdi,
1471 unsigned int clearing)
1473 unsigned int events;
1475 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1476 cdi->vfs_events |= events;
1477 cdi->ioctl_events |= events;
1480 unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1481 unsigned int clearing)
1483 unsigned int events;
1485 cdrom_update_events(cdi, clearing);
1486 events = cdi->vfs_events;
1487 cdi->vfs_events = 0;
1490 EXPORT_SYMBOL(cdrom_check_events);
1492 /* We want to make media_changed accessible to the user through an
1493 * ioctl. The main problem now is that we must double-buffer the
1494 * low-level implementation, to assure that the VFS and the user both
1495 * see a medium change once.
1499 int media_changed(struct cdrom_device_info *cdi, int queue)
1501 unsigned int mask = (1 << (queue & 1));
1502 int ret = !!(cdi->mc_flags & mask);
1505 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1508 /* changed since last call? */
1509 if (cdi->ops->check_events) {
1510 BUG_ON(!queue); /* shouldn't be called from VFS path */
1511 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1512 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1513 cdi->ioctl_events = 0;
1515 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1518 cdi->mc_flags = 0x3; /* set bit on both queues */
1520 cdi->media_written = 0;
1523 cdi->mc_flags &= ~mask; /* clear bit */
1527 int cdrom_media_changed(struct cdrom_device_info *cdi)
1529 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1530 * Returning "0" is always safe (media hasn't been changed). Do that
1531 * if the low-level cdrom driver dosn't support media changed. */
1532 if (cdi == NULL || cdi->ops->media_changed == NULL)
1534 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1536 return media_changed(cdi, 0);
1539 /* Requests to the low-level drivers will /always/ be done in the
1540 following format convention:
1542 CDROM_LBA: all data-related requests.
1543 CDROM_MSF: all audio-related requests.
1545 However, a low-level implementation is allowed to refuse this
1546 request, and return information in its own favorite format.
1548 It doesn't make sense /at all/ to ask for a play_audio in LBA
1549 format, or ask for multi-session info in MSF format. However, for
1550 backward compatibility these format requests will be satisfied, but
1551 the requests to the low-level drivers will be sanitized in the more
1552 meaningful format indicated above.
1556 void sanitize_format(union cdrom_addr *addr,
1557 u_char * curr, u_char requested)
1559 if (*curr == requested)
1560 return; /* nothing to be done! */
1561 if (requested == CDROM_LBA) {
1562 addr->lba = (int) addr->msf.frame +
1563 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1564 } else { /* CDROM_MSF */
1565 int lba = addr->lba;
1566 addr->msf.frame = lba % 75;
1569 addr->msf.second = lba % 60;
1570 addr->msf.minute = lba / 60;
1575 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1578 memset(cgc, 0, sizeof(struct packet_command));
1580 memset(buf, 0, len);
1581 cgc->buffer = (char *) buf;
1583 cgc->data_direction = type;
1584 cgc->timeout = CDROM_DEF_TIMEOUT;
1589 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1590 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1592 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1594 cgc->cmd[0] = GPCMD_REPORT_KEY;
1595 cgc->cmd[10] = type | (agid << 6);
1597 case 0: case 8: case 5: {
1610 cgc->cmd[9] = cgc->buflen;
1611 cgc->data_direction = CGC_DATA_READ;
1614 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1616 cgc->cmd[0] = GPCMD_SEND_KEY;
1617 cgc->cmd[10] = type | (agid << 6);
1632 cgc->cmd[9] = cgc->buflen;
1633 cgc->data_direction = CGC_DATA_WRITE;
1636 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1640 struct packet_command cgc;
1641 const struct cdrom_device_ops *cdo = cdi->ops;
1642 rpc_state_t rpc_state;
1644 memset(buf, 0, sizeof(buf));
1645 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1649 case DVD_LU_SEND_AGID:
1650 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1652 setup_report_key(&cgc, ai->lsa.agid, 0);
1654 if ((ret = cdo->generic_packet(cdi, &cgc)))
1657 ai->lsa.agid = buf[7] >> 6;
1658 /* Returning data, let host change state */
1661 case DVD_LU_SEND_KEY1:
1662 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1663 setup_report_key(&cgc, ai->lsk.agid, 2);
1665 if ((ret = cdo->generic_packet(cdi, &cgc)))
1668 copy_key(ai->lsk.key, &buf[4]);
1669 /* Returning data, let host change state */
1672 case DVD_LU_SEND_CHALLENGE:
1673 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1674 setup_report_key(&cgc, ai->lsc.agid, 1);
1676 if ((ret = cdo->generic_packet(cdi, &cgc)))
1679 copy_chal(ai->lsc.chal, &buf[4]);
1680 /* Returning data, let host change state */
1684 case DVD_LU_SEND_TITLE_KEY:
1685 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1687 setup_report_key(&cgc, ai->lstk.agid, 4);
1688 cgc.cmd[5] = ai->lstk.lba;
1689 cgc.cmd[4] = ai->lstk.lba >> 8;
1690 cgc.cmd[3] = ai->lstk.lba >> 16;
1691 cgc.cmd[2] = ai->lstk.lba >> 24;
1693 if ((ret = cdo->generic_packet(cdi, &cgc)))
1696 ai->lstk.cpm = (buf[4] >> 7) & 1;
1697 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1698 ai->lstk.cgms = (buf[4] >> 4) & 3;
1699 copy_key(ai->lstk.title_key, &buf[5]);
1700 /* Returning data, let host change state */
1703 case DVD_LU_SEND_ASF:
1704 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1705 setup_report_key(&cgc, ai->lsasf.agid, 5);
1707 if ((ret = cdo->generic_packet(cdi, &cgc)))
1710 ai->lsasf.asf = buf[7] & 1;
1713 /* LU data receive (LU changes state) */
1714 case DVD_HOST_SEND_CHALLENGE:
1715 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1716 setup_send_key(&cgc, ai->hsc.agid, 1);
1718 copy_chal(&buf[4], ai->hsc.chal);
1720 if ((ret = cdo->generic_packet(cdi, &cgc)))
1723 ai->type = DVD_LU_SEND_KEY1;
1726 case DVD_HOST_SEND_KEY2:
1727 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1728 setup_send_key(&cgc, ai->hsk.agid, 3);
1730 copy_key(&buf[4], ai->hsk.key);
1732 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1733 ai->type = DVD_AUTH_FAILURE;
1736 ai->type = DVD_AUTH_ESTABLISHED;
1740 case DVD_INVALIDATE_AGID:
1742 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1743 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1744 if ((ret = cdo->generic_packet(cdi, &cgc)))
1748 /* Get region settings */
1749 case DVD_LU_SEND_RPC_STATE:
1750 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1751 setup_report_key(&cgc, 0, 8);
1752 memset(&rpc_state, 0, sizeof(rpc_state_t));
1753 cgc.buffer = (char *) &rpc_state;
1755 if ((ret = cdo->generic_packet(cdi, &cgc)))
1758 ai->lrpcs.type = rpc_state.type_code;
1759 ai->lrpcs.vra = rpc_state.vra;
1760 ai->lrpcs.ucca = rpc_state.ucca;
1761 ai->lrpcs.region_mask = rpc_state.region_mask;
1762 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1765 /* Set region settings */
1766 case DVD_HOST_SEND_RPC_STATE:
1767 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1768 setup_send_key(&cgc, 0, 6);
1770 buf[4] = ai->hrpcs.pdrc;
1772 if ((ret = cdo->generic_packet(cdi, &cgc)))
1777 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1784 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1785 struct packet_command *cgc)
1787 unsigned char buf[21], *base;
1788 struct dvd_layer *layer;
1789 const struct cdrom_device_ops *cdo = cdi->ops;
1790 int ret, layer_num = s->physical.layer_num;
1792 if (layer_num >= DVD_LAYERS)
1795 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1796 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1797 cgc->cmd[6] = layer_num;
1798 cgc->cmd[7] = s->type;
1799 cgc->cmd[9] = cgc->buflen & 0xff;
1802 * refrain from reporting errors on non-existing layers (mainly)
1806 ret = cdo->generic_packet(cdi, cgc);
1811 layer = &s->physical.layer[layer_num];
1814 * place the data... really ugly, but at least we won't have to
1815 * worry about endianess in userspace.
1817 memset(layer, 0, sizeof(*layer));
1818 layer->book_version = base[0] & 0xf;
1819 layer->book_type = base[0] >> 4;
1820 layer->min_rate = base[1] & 0xf;
1821 layer->disc_size = base[1] >> 4;
1822 layer->layer_type = base[2] & 0xf;
1823 layer->track_path = (base[2] >> 4) & 1;
1824 layer->nlayers = (base[2] >> 5) & 3;
1825 layer->track_density = base[3] & 0xf;
1826 layer->linear_density = base[3] >> 4;
1827 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1828 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1829 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1830 layer->bca = base[16] >> 7;
1835 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1836 struct packet_command *cgc)
1840 const struct cdrom_device_ops *cdo = cdi->ops;
1842 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1843 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1844 cgc->cmd[6] = s->copyright.layer_num;
1845 cgc->cmd[7] = s->type;
1846 cgc->cmd[8] = cgc->buflen >> 8;
1847 cgc->cmd[9] = cgc->buflen & 0xff;
1849 ret = cdo->generic_packet(cdi, cgc);
1853 s->copyright.cpst = buf[4];
1854 s->copyright.rmi = buf[5];
1859 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1860 struct packet_command *cgc)
1864 const struct cdrom_device_ops *cdo = cdi->ops;
1866 size = sizeof(s->disckey.value) + 4;
1868 buf = kmalloc(size, GFP_KERNEL);
1872 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1873 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1874 cgc->cmd[7] = s->type;
1875 cgc->cmd[8] = size >> 8;
1876 cgc->cmd[9] = size & 0xff;
1877 cgc->cmd[10] = s->disckey.agid << 6;
1879 ret = cdo->generic_packet(cdi, cgc);
1881 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1887 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1888 struct packet_command *cgc)
1890 int ret, size = 4 + 188;
1892 const struct cdrom_device_ops *cdo = cdi->ops;
1894 buf = kmalloc(size, GFP_KERNEL);
1898 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1899 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1900 cgc->cmd[7] = s->type;
1901 cgc->cmd[9] = cgc->buflen & 0xff;
1903 ret = cdo->generic_packet(cdi, cgc);
1907 s->bca.len = buf[0] << 8 | buf[1];
1908 if (s->bca.len < 12 || s->bca.len > 188) {
1909 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1914 memcpy(s->bca.value, &buf[4], s->bca.len);
1921 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1922 struct packet_command *cgc)
1926 const struct cdrom_device_ops *cdo = cdi->ops;
1928 size = sizeof(s->manufact.value) + 4;
1930 buf = kmalloc(size, GFP_KERNEL);
1934 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1935 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1936 cgc->cmd[7] = s->type;
1937 cgc->cmd[8] = size >> 8;
1938 cgc->cmd[9] = size & 0xff;
1940 ret = cdo->generic_packet(cdi, cgc);
1944 s->manufact.len = buf[0] << 8 | buf[1];
1945 if (s->manufact.len < 0) {
1946 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1950 if (s->manufact.len > 2048) {
1951 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1953 s->manufact.len = 2048;
1955 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1963 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1964 struct packet_command *cgc)
1967 case DVD_STRUCT_PHYSICAL:
1968 return dvd_read_physical(cdi, s, cgc);
1970 case DVD_STRUCT_COPYRIGHT:
1971 return dvd_read_copyright(cdi, s, cgc);
1973 case DVD_STRUCT_DISCKEY:
1974 return dvd_read_disckey(cdi, s, cgc);
1976 case DVD_STRUCT_BCA:
1977 return dvd_read_bca(cdi, s, cgc);
1979 case DVD_STRUCT_MANUFACT:
1980 return dvd_read_manufact(cdi, s, cgc);
1983 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1989 int cdrom_mode_sense(struct cdrom_device_info *cdi,
1990 struct packet_command *cgc,
1991 int page_code, int page_control)
1993 const struct cdrom_device_ops *cdo = cdi->ops;
1995 memset(cgc->cmd, 0, sizeof(cgc->cmd));
1997 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
1998 cgc->cmd[2] = page_code | (page_control << 6);
1999 cgc->cmd[7] = cgc->buflen >> 8;
2000 cgc->cmd[8] = cgc->buflen & 0xff;
2001 cgc->data_direction = CGC_DATA_READ;
2002 return cdo->generic_packet(cdi, cgc);
2005 int cdrom_mode_select(struct cdrom_device_info *cdi,
2006 struct packet_command *cgc)
2008 const struct cdrom_device_ops *cdo = cdi->ops;
2010 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2011 memset(cgc->buffer, 0, 2);
2012 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2013 cgc->cmd[1] = 0x10; /* PF */
2014 cgc->cmd[7] = cgc->buflen >> 8;
2015 cgc->cmd[8] = cgc->buflen & 0xff;
2016 cgc->data_direction = CGC_DATA_WRITE;
2017 return cdo->generic_packet(cdi, cgc);
2020 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2021 struct cdrom_subchnl *subchnl, int mcn)
2023 const struct cdrom_device_ops *cdo = cdi->ops;
2024 struct packet_command cgc;
2028 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2029 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2030 cgc.cmd[1] = subchnl->cdsc_format;/* MSF or LBA addressing */
2031 cgc.cmd[2] = 0x40; /* request subQ data */
2032 cgc.cmd[3] = mcn ? 2 : 1;
2035 if ((ret = cdo->generic_packet(cdi, &cgc)))
2038 subchnl->cdsc_audiostatus = cgc.buffer[1];
2039 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2040 subchnl->cdsc_trk = cgc.buffer[6];
2041 subchnl->cdsc_ind = cgc.buffer[7];
2043 if (subchnl->cdsc_format == CDROM_LBA) {
2044 subchnl->cdsc_absaddr.lba = ((cgc.buffer[8] << 24) |
2045 (cgc.buffer[9] << 16) |
2046 (cgc.buffer[10] << 8) |
2048 subchnl->cdsc_reladdr.lba = ((cgc.buffer[12] << 24) |
2049 (cgc.buffer[13] << 16) |
2050 (cgc.buffer[14] << 8) |
2053 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2054 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2055 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2056 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2057 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2058 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
2065 * Specific READ_10 interface
2067 static int cdrom_read_cd(struct cdrom_device_info *cdi,
2068 struct packet_command *cgc, int lba,
2069 int blocksize, int nblocks)
2071 const struct cdrom_device_ops *cdo = cdi->ops;
2073 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2074 cgc->cmd[0] = GPCMD_READ_10;
2075 cgc->cmd[2] = (lba >> 24) & 0xff;
2076 cgc->cmd[3] = (lba >> 16) & 0xff;
2077 cgc->cmd[4] = (lba >> 8) & 0xff;
2078 cgc->cmd[5] = lba & 0xff;
2079 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2080 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2081 cgc->cmd[8] = nblocks & 0xff;
2082 cgc->buflen = blocksize * nblocks;
2083 return cdo->generic_packet(cdi, cgc);
2086 /* very generic interface for reading the various types of blocks */
2087 static int cdrom_read_block(struct cdrom_device_info *cdi,
2088 struct packet_command *cgc,
2089 int lba, int nblocks, int format, int blksize)
2091 const struct cdrom_device_ops *cdo = cdi->ops;
2093 memset(&cgc->cmd, 0, sizeof(cgc->cmd));
2094 cgc->cmd[0] = GPCMD_READ_CD;
2095 /* expected sector size - cdda,mode1,etc. */
2096 cgc->cmd[1] = format << 2;
2097 /* starting address */
2098 cgc->cmd[2] = (lba >> 24) & 0xff;
2099 cgc->cmd[3] = (lba >> 16) & 0xff;
2100 cgc->cmd[4] = (lba >> 8) & 0xff;
2101 cgc->cmd[5] = lba & 0xff;
2102 /* number of blocks */
2103 cgc->cmd[6] = (nblocks >> 16) & 0xff;
2104 cgc->cmd[7] = (nblocks >> 8) & 0xff;
2105 cgc->cmd[8] = nblocks & 0xff;
2106 cgc->buflen = blksize * nblocks;
2108 /* set the header info returned */
2110 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
2111 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
2112 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
2113 default : cgc->cmd[9] = 0x10;
2116 return cdo->generic_packet(cdi, cgc);
2119 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2120 int lba, int nframes)
2122 struct packet_command cgc;
2126 cdi->last_sense = 0;
2128 memset(&cgc, 0, sizeof(cgc));
2131 * start with will ra.nframes size, back down if alloc fails
2135 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
2145 cgc.data_direction = CGC_DATA_READ;
2146 while (nframes > 0) {
2150 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
2153 if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
2157 ubuf += CD_FRAMESIZE_RAW * nr;
2165 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2166 int lba, int nframes)
2168 struct request_queue *q = cdi->disk->queue;
2170 struct scsi_request *req;
2178 if (!blk_queue_scsi_passthrough(q)) {
2180 "Attempt read CDDA info through a non-SCSI queue\n");
2184 cdi->last_sense = 0;
2188 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2190 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2191 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2193 len = nr * CD_FRAMESIZE_RAW;
2195 rq = blk_get_request(q, REQ_OP_SCSI_IN, GFP_KERNEL);
2202 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2204 blk_put_request(rq);
2208 req->cmd[0] = GPCMD_READ_CD;
2209 req->cmd[1] = 1 << 2;
2210 req->cmd[2] = (lba >> 24) & 0xff;
2211 req->cmd[3] = (lba >> 16) & 0xff;
2212 req->cmd[4] = (lba >> 8) & 0xff;
2213 req->cmd[5] = lba & 0xff;
2214 req->cmd[6] = (nr >> 16) & 0xff;
2215 req->cmd[7] = (nr >> 8) & 0xff;
2216 req->cmd[8] = nr & 0xff;
2220 rq->timeout = 60 * HZ;
2223 blk_execute_rq(q, cdi->disk, rq, 0);
2224 if (scsi_req(rq)->result) {
2225 struct request_sense *s = req->sense;
2227 cdi->last_sense = s->sense_key;
2230 if (blk_rq_unmap_user(bio))
2232 blk_put_request(rq);
2245 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2246 int lba, int nframes)
2250 if (cdi->cdda_method == CDDA_OLD)
2251 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2255 * for anything else than success and io error, we need to retry
2257 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2258 if (!ret || ret != -EIO)
2262 * I've seen drives get sense 4/8/3 udma crc errors on multi
2263 * frame dma, so drop to single frame dma if we need to
2265 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2266 pr_info("dropping to single frame dma\n");
2267 cdi->cdda_method = CDDA_BPC_SINGLE;
2272 * so we have an io error of some sort with multi frame dma. if the
2273 * condition wasn't a hardware error
2274 * problems, not for any error
2276 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2279 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2280 cdi->cdda_method = CDDA_OLD;
2281 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2284 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2287 struct cdrom_multisession ms_info;
2288 u8 requested_format;
2291 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2293 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2296 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2299 requested_format = ms_info.addr_format;
2300 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2302 ms_info.addr_format = CDROM_LBA;
2304 ret = cdi->ops->get_last_session(cdi, &ms_info);
2308 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2310 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2313 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2317 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2319 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2321 if (!CDROM_CAN(CDC_OPEN_TRAY))
2323 if (cdi->use_count != 1 || cdi->keeplocked)
2325 if (CDROM_CAN(CDC_LOCK)) {
2326 int ret = cdi->ops->lock_door(cdi, 0);
2331 return cdi->ops->tray_move(cdi, 1);
2334 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2336 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2338 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2340 return cdi->ops->tray_move(cdi, 0);
2343 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2346 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2348 if (!CDROM_CAN(CDC_OPEN_TRAY))
2350 if (cdi->keeplocked)
2353 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2355 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2359 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2362 struct cdrom_changer_info *info;
2365 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2367 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2370 /* cannot select disc or select current disc */
2371 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2372 return media_changed(cdi, 1);
2374 if ((unsigned int)arg >= cdi->capacity)
2377 info = kmalloc(sizeof(*info), GFP_KERNEL);
2381 ret = cdrom_read_mech_status(cdi, info);
2383 ret = info->slots[arg].change;
2388 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2391 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2394 * Options need to be in sync with capability.
2395 * Too late for that, so we have to check each one separately.
2398 case CDO_USE_FFLAGS:
2399 case CDO_CHECK_TYPE:
2402 if (!CDROM_CAN(CDC_LOCK))
2406 return cdi->options;
2407 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2409 if (!CDROM_CAN(arg))
2412 cdi->options |= (int) arg;
2413 return cdi->options;
2416 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2419 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2421 cdi->options &= ~(int) arg;
2422 return cdi->options;
2425 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2428 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2430 if (!CDROM_CAN(CDC_SELECT_SPEED))
2432 return cdi->ops->select_speed(cdi, arg);
2435 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2438 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2440 if (!CDROM_CAN(CDC_SELECT_DISC))
2443 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2444 if ((int)arg >= cdi->capacity)
2449 * ->select_disc is a hook to allow a driver-specific way of
2450 * seleting disc. However, since there is no equivalent hook for
2451 * cdrom_slot_status this may not actually be useful...
2453 if (cdi->ops->select_disc)
2454 return cdi->ops->select_disc(cdi, arg);
2456 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2457 return cdrom_select_disc(cdi, arg);
2460 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2461 struct block_device *bdev)
2463 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2465 if (!capable(CAP_SYS_ADMIN))
2467 if (!CDROM_CAN(CDC_RESET))
2469 invalidate_bdev(bdev);
2470 return cdi->ops->reset(cdi);
2473 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2476 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2478 if (!CDROM_CAN(CDC_LOCK))
2479 return -EDRIVE_CANT_DO_THIS;
2481 cdi->keeplocked = arg ? 1 : 0;
2484 * Don't unlock the door on multiple opens by default, but allow
2487 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2489 return cdi->ops->lock_door(cdi, arg);
2492 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2495 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2497 if (!capable(CAP_SYS_ADMIN))
2499 debug = arg ? 1 : 0;
2503 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2505 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2506 return (cdi->ops->capability & ~cdi->mask);
2510 * The following function is implemented, although very few audio
2511 * discs give Universal Product Code information, which should just be
2512 * the Medium Catalog Number on the box. Note, that the way the code
2513 * is written on the CD is /not/ uniform across all discs!
2515 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2518 struct cdrom_mcn mcn;
2521 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2523 if (!(cdi->ops->capability & CDC_MCN))
2525 ret = cdi->ops->get_mcn(cdi, &mcn);
2529 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2531 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2535 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2538 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2540 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2542 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2543 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2544 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2545 if (((int)arg >= cdi->capacity))
2547 return cdrom_slot_status(cdi, arg);
2551 * Ok, this is where problems start. The current interface for the
2552 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2553 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2554 * is often the case, it is also very common for CDs to have some tracks
2555 * with data, and some tracks with audio. Just because I feel like it,
2556 * I declare the following to be the best way to cope. If the CD has ANY
2557 * data tracks on it, it will be returned as a data CD. If it has any XA
2558 * tracks, I will return it as that. Now I could simplify this interface
2559 * by combining these returns with the above, but this more clearly
2560 * demonstrates the problem with the current interface. Too bad this
2561 * wasn't designed to use bitmasks... -Erik
2563 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2564 * User level programmers might feel the ioctl is not very useful.
2567 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2571 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2573 cdrom_count_tracks(cdi, &tracks);
2575 return tracks.error;
2577 /* Policy mode on */
2578 if (tracks.audio > 0) {
2579 if (!tracks.data && !tracks.cdi && !tracks.xa)
2589 if (tracks.data > 0)
2591 /* Policy mode off */
2593 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2597 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2599 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2600 return cdi->capacity;
2603 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2606 struct cdrom_subchnl q;
2610 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2612 if (copy_from_user(&q, argp, sizeof(q)))
2615 requested = q.cdsc_format;
2616 if (requested != CDROM_MSF && requested != CDROM_LBA)
2618 q.cdsc_format = CDROM_MSF;
2620 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2624 back = q.cdsc_format; /* local copy */
2625 sanitize_format(&q.cdsc_absaddr, &back, requested);
2626 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2628 if (copy_to_user(argp, &q, sizeof(q)))
2630 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2634 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2637 struct cdrom_tochdr header;
2640 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2642 if (copy_from_user(&header, argp, sizeof(header)))
2645 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2649 if (copy_to_user(argp, &header, sizeof(header)))
2651 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2655 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2658 struct cdrom_tocentry entry;
2659 u8 requested_format;
2662 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2664 if (copy_from_user(&entry, argp, sizeof(entry)))
2667 requested_format = entry.cdte_format;
2668 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2670 /* make interface to low-level uniform */
2671 entry.cdte_format = CDROM_MSF;
2672 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2675 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2677 if (copy_to_user(argp, &entry, sizeof(entry)))
2679 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2683 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2686 struct cdrom_msf msf;
2688 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2690 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2692 if (copy_from_user(&msf, argp, sizeof(msf)))
2694 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2697 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2703 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2705 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2707 if (copy_from_user(&ti, argp, sizeof(ti)))
2710 ret = check_for_audio_disc(cdi, cdi->ops);
2713 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2715 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2718 struct cdrom_volctrl volume;
2720 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2722 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2724 if (copy_from_user(&volume, argp, sizeof(volume)))
2726 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2729 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2732 struct cdrom_volctrl volume;
2735 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2737 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2740 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2744 if (copy_to_user(argp, &volume, sizeof(volume)))
2749 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2754 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2756 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2758 ret = check_for_audio_disc(cdi, cdi->ops);
2761 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2765 * Required when we need to use READ_10 to issue other than 2048 block
2768 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2770 const struct cdrom_device_ops *cdo = cdi->ops;
2771 struct packet_command cgc;
2772 struct modesel_head mh;
2774 memset(&mh, 0, sizeof(mh));
2775 mh.block_desc_length = 0x08;
2776 mh.block_length_med = (size >> 8) & 0xff;
2777 mh.block_length_lo = size & 0xff;
2779 memset(&cgc, 0, sizeof(cgc));
2781 cgc.cmd[1] = 1 << 4;
2783 cgc.buflen = sizeof(mh);
2784 cgc.buffer = (char *) &mh;
2785 cgc.data_direction = CGC_DATA_WRITE;
2786 mh.block_desc_length = 0x08;
2787 mh.block_length_med = (size >> 8) & 0xff;
2788 mh.block_length_lo = size & 0xff;
2790 return cdo->generic_packet(cdi, &cgc);
2793 static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2794 __u16 track, __u8 type, track_information *ti)
2796 const struct cdrom_device_ops *cdo = cdi->ops;
2797 struct packet_command cgc;
2800 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2801 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2802 cgc.cmd[1] = type & 3;
2803 cgc.cmd[4] = (track & 0xff00) >> 8;
2804 cgc.cmd[5] = track & 0xff;
2808 ret = cdo->generic_packet(cdi, &cgc);
2812 buflen = be16_to_cpu(ti->track_information_length) +
2813 sizeof(ti->track_information_length);
2815 if (buflen > sizeof(track_information))
2816 buflen = sizeof(track_information);
2818 cgc.cmd[8] = cgc.buflen = buflen;
2819 ret = cdo->generic_packet(cdi, &cgc);
2823 /* return actual fill size */
2827 /* return the last written block on the CD-R media. this is for the udf
2829 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2831 struct cdrom_tocentry toc;
2832 disc_information di;
2833 track_information ti;
2835 int ret = -1, ti_size;
2837 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2840 ret = cdrom_get_disc_info(cdi, &di);
2841 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2842 + sizeof(di.last_track_lsb)))
2845 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2846 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2847 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2848 if (ti_size < (int)offsetof(typeof(ti), track_start))
2851 /* if this track is blank, try the previous. */
2853 if (last_track == 1)
2856 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2859 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2860 + sizeof(ti.track_size)))
2863 /* if last recorded field is valid, return it. */
2864 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2865 + sizeof(ti.last_rec_address))) {
2866 *last_written = be32_to_cpu(ti.last_rec_address);
2868 /* make it up instead */
2869 *last_written = be32_to_cpu(ti.track_start) +
2870 be32_to_cpu(ti.track_size);
2872 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2876 /* this is where we end up if the drive either can't do a
2877 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2878 it doesn't give enough information or fails. then we return
2879 the toc contents. */
2881 toc.cdte_format = CDROM_MSF;
2882 toc.cdte_track = CDROM_LEADOUT;
2883 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2885 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2886 *last_written = toc.cdte_addr.lba;
2890 /* return the next writable block. also for udf file system. */
2891 static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2892 long *next_writable)
2894 disc_information di;
2895 track_information ti;
2899 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2900 goto use_last_written;
2902 ret = cdrom_get_disc_info(cdi, &di);
2903 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2904 + sizeof(di.last_track_lsb))
2905 goto use_last_written;
2907 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2908 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2909 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2910 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2911 goto use_last_written;
2913 /* if this track is blank, try the previous. */
2915 if (last_track == 1)
2916 goto use_last_written;
2918 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2920 goto use_last_written;
2923 /* if next recordable address field is valid, use it. */
2924 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2925 + sizeof(ti.next_writable)) {
2926 *next_writable = be32_to_cpu(ti.next_writable);
2931 ret = cdrom_get_last_written(cdi, next_writable);
2936 *next_writable += 7;
2941 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2943 struct packet_command *cgc,
2946 struct request_sense sense;
2947 struct cdrom_msf msf;
2948 int blocksize = 0, format = 0, lba;
2953 blocksize = CD_FRAMESIZE_RAW;
2955 case CDROMREADMODE1:
2956 blocksize = CD_FRAMESIZE;
2959 case CDROMREADMODE2:
2960 blocksize = CD_FRAMESIZE_RAW0;
2963 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2965 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2966 /* FIXME: we need upper bound checking, too!! */
2970 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2971 if (cgc->buffer == NULL)
2974 memset(&sense, 0, sizeof(sense));
2975 cgc->sense = &sense;
2976 cgc->data_direction = CGC_DATA_READ;
2977 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2978 if (ret && sense.sense_key == 0x05 &&
2979 sense.asc == 0x20 &&
2980 sense.ascq == 0x00) {
2982 * SCSI-II devices are not required to support
2983 * READ_CD, so let's try switching block size
2985 /* FIXME: switch back again... */
2986 ret = cdrom_switch_blocksize(cdi, blocksize);
2990 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2991 ret |= cdrom_switch_blocksize(cdi, blocksize);
2993 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
3000 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
3003 struct cdrom_read_audio ra;
3006 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3010 if (ra.addr_format == CDROM_MSF)
3011 lba = msf_to_lba(ra.addr.msf.minute,
3014 else if (ra.addr_format == CDROM_LBA)
3019 /* FIXME: we need upper bound checking, too!! */
3020 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3023 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3026 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3030 struct cdrom_subchnl q;
3031 u_char requested, back;
3032 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3034 requested = q.cdsc_format;
3035 if (!((requested == CDROM_MSF) ||
3036 (requested == CDROM_LBA)))
3039 ret = cdrom_read_subchannel(cdi, &q, 0);
3042 back = q.cdsc_format; /* local copy */
3043 sanitize_format(&q.cdsc_absaddr, &back, requested);
3044 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3045 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3047 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3051 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3053 struct packet_command *cgc)
3055 const struct cdrom_device_ops *cdo = cdi->ops;
3056 struct cdrom_msf msf;
3057 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3058 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3060 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3061 cgc->cmd[3] = msf.cdmsf_min0;
3062 cgc->cmd[4] = msf.cdmsf_sec0;
3063 cgc->cmd[5] = msf.cdmsf_frame0;
3064 cgc->cmd[6] = msf.cdmsf_min1;
3065 cgc->cmd[7] = msf.cdmsf_sec1;
3066 cgc->cmd[8] = msf.cdmsf_frame1;
3067 cgc->data_direction = CGC_DATA_NONE;
3068 return cdo->generic_packet(cdi, cgc);
3071 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3073 struct packet_command *cgc)
3075 const struct cdrom_device_ops *cdo = cdi->ops;
3076 struct cdrom_blk blk;
3077 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3078 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3080 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3081 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3082 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3083 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3084 cgc->cmd[5] = blk.from & 0xff;
3085 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3086 cgc->cmd[8] = blk.len & 0xff;
3087 cgc->data_direction = CGC_DATA_NONE;
3088 return cdo->generic_packet(cdi, cgc);
3091 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3093 struct packet_command *cgc,
3096 struct cdrom_volctrl volctrl;
3097 unsigned char buffer[32];
3098 char mask[sizeof(buffer)];
3099 unsigned short offset;
3102 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3104 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3108 cgc->buffer = buffer;
3110 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3114 /* originally the code depended on buffer[1] to determine
3115 how much data is available for transfer. buffer[1] is
3116 unfortunately ambigious and the only reliable way seem
3117 to be to simply skip over the block descriptor... */
3118 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3120 if (offset + 16 > sizeof(buffer))
3123 if (offset + 16 > cgc->buflen) {
3124 cgc->buflen = offset + 16;
3125 ret = cdrom_mode_sense(cdi, cgc,
3126 GPMODE_AUDIO_CTL_PAGE, 0);
3132 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3133 buffer[offset + 1] < 14)
3136 /* now we have the current volume settings. if it was only
3137 a CDROMVOLREAD, return these values */
3138 if (cmd == CDROMVOLREAD) {
3139 volctrl.channel0 = buffer[offset+9];
3140 volctrl.channel1 = buffer[offset+11];
3141 volctrl.channel2 = buffer[offset+13];
3142 volctrl.channel3 = buffer[offset+15];
3143 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3149 /* get the volume mask */
3151 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3155 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3156 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3157 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3158 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3161 cgc->buffer = buffer + offset - 8;
3162 memset(cgc->buffer, 0, 8);
3163 return cdrom_mode_select(cdi, cgc);
3166 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3167 struct packet_command *cgc,
3170 const struct cdrom_device_ops *cdo = cdi->ops;
3171 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3172 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3174 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3175 cgc->data_direction = CGC_DATA_NONE;
3176 return cdo->generic_packet(cdi, cgc);
3179 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3180 struct packet_command *cgc,
3183 const struct cdrom_device_ops *cdo = cdi->ops;
3184 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3185 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3186 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3187 cgc->data_direction = CGC_DATA_NONE;
3188 return cdo->generic_packet(cdi, cgc);
3191 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3193 struct packet_command *cgc)
3197 int size = sizeof(dvd_struct);
3199 if (!CDROM_CAN(CDC_DVD))
3202 s = memdup_user(arg, size);
3206 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3208 ret = dvd_read_struct(cdi, s, cgc);
3212 if (copy_to_user(arg, s, size))
3219 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3224 if (!CDROM_CAN(CDC_DVD))
3226 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3227 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3229 ret = dvd_do_auth(cdi, &ai);
3232 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3237 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3242 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3243 ret = cdrom_get_next_writable(cdi, &next);
3246 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3251 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3256 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3257 ret = cdrom_get_last_written(cdi, &last);
3260 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3265 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3268 struct packet_command cgc;
3269 void __user *userptr = (void __user *)arg;
3271 memset(&cgc, 0, sizeof(cgc));
3273 /* build a unified command and queue it through
3274 cdo->generic_packet() */
3277 case CDROMREADMODE1:
3278 case CDROMREADMODE2:
3279 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3280 case CDROMREADAUDIO:
3281 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3283 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3285 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3287 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3290 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3293 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3296 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3297 case DVD_READ_STRUCT:
3298 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3300 return mmc_ioctl_dvd_auth(cdi, userptr);
3301 case CDROM_NEXT_WRITABLE:
3302 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3303 case CDROM_LAST_WRITTEN:
3304 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3311 * Just about every imaginable ioctl is supported in the Uniform layer
3313 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3315 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3316 fmode_t mode, unsigned int cmd, unsigned long arg)
3318 void __user *argp = (void __user *)arg;
3322 * Try the generic SCSI command ioctl's first.
3324 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3329 case CDROMMULTISESSION:
3330 return cdrom_ioctl_multisession(cdi, argp);
3332 return cdrom_ioctl_eject(cdi);
3333 case CDROMCLOSETRAY:
3334 return cdrom_ioctl_closetray(cdi);
3336 return cdrom_ioctl_eject_sw(cdi, arg);
3337 case CDROM_MEDIA_CHANGED:
3338 return cdrom_ioctl_media_changed(cdi, arg);
3339 case CDROM_SET_OPTIONS:
3340 return cdrom_ioctl_set_options(cdi, arg);
3341 case CDROM_CLEAR_OPTIONS:
3342 return cdrom_ioctl_clear_options(cdi, arg);
3343 case CDROM_SELECT_SPEED:
3344 return cdrom_ioctl_select_speed(cdi, arg);
3345 case CDROM_SELECT_DISC:
3346 return cdrom_ioctl_select_disc(cdi, arg);
3348 return cdrom_ioctl_reset(cdi, bdev);
3349 case CDROM_LOCKDOOR:
3350 return cdrom_ioctl_lock_door(cdi, arg);
3352 return cdrom_ioctl_debug(cdi, arg);
3353 case CDROM_GET_CAPABILITY:
3354 return cdrom_ioctl_get_capability(cdi);
3356 return cdrom_ioctl_get_mcn(cdi, argp);
3357 case CDROM_DRIVE_STATUS:
3358 return cdrom_ioctl_drive_status(cdi, arg);
3359 case CDROM_DISC_STATUS:
3360 return cdrom_ioctl_disc_status(cdi);
3361 case CDROM_CHANGER_NSLOTS:
3362 return cdrom_ioctl_changer_nslots(cdi);
3366 * Use the ioctls that are implemented through the generic_packet()
3367 * interface. this may look at bit funny, but if -ENOTTY is
3368 * returned that particular ioctl is not implemented and we
3369 * let it go through the device specific ones.
3371 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3372 ret = mmc_ioctl(cdi, cmd, arg);
3378 * Note: most of the cd_dbg() calls are commented out here,
3379 * because they fill up the sys log when CD players poll
3384 return cdrom_ioctl_get_subchnl(cdi, argp);
3385 case CDROMREADTOCHDR:
3386 return cdrom_ioctl_read_tochdr(cdi, argp);
3387 case CDROMREADTOCENTRY:
3388 return cdrom_ioctl_read_tocentry(cdi, argp);
3390 return cdrom_ioctl_play_msf(cdi, argp);
3391 case CDROMPLAYTRKIND:
3392 return cdrom_ioctl_play_trkind(cdi, argp);
3394 return cdrom_ioctl_volctrl(cdi, argp);
3396 return cdrom_ioctl_volread(cdi, argp);
3401 return cdrom_ioctl_audioctl(cdi, cmd);
3407 EXPORT_SYMBOL(cdrom_get_last_written);
3408 EXPORT_SYMBOL(register_cdrom);
3409 EXPORT_SYMBOL(unregister_cdrom);
3410 EXPORT_SYMBOL(cdrom_open);
3411 EXPORT_SYMBOL(cdrom_release);
3412 EXPORT_SYMBOL(cdrom_ioctl);
3413 EXPORT_SYMBOL(cdrom_media_changed);
3414 EXPORT_SYMBOL(cdrom_number_of_slots);
3415 EXPORT_SYMBOL(cdrom_mode_select);
3416 EXPORT_SYMBOL(cdrom_mode_sense);
3417 EXPORT_SYMBOL(init_cdrom_command);
3418 EXPORT_SYMBOL(cdrom_get_media_event);
3420 #ifdef CONFIG_SYSCTL
3422 #define CDROM_STR_SIZE 1000
3424 static struct cdrom_sysctl_settings {
3425 char info[CDROM_STR_SIZE]; /* general info */
3426 int autoclose; /* close tray upon mount, etc */
3427 int autoeject; /* eject on umount */
3428 int debug; /* turn on debugging messages */
3429 int lock; /* lock the door on device open */
3430 int check; /* check media type */
3431 } cdrom_sysctl_settings;
3433 enum cdrom_print_option {
3440 static int cdrom_print_info(const char *header, int val, char *info,
3441 int *pos, enum cdrom_print_option option)
3443 const int max_size = sizeof(cdrom_sysctl_settings.info);
3444 struct cdrom_device_info *cdi;
3447 ret = scnprintf(info + *pos, max_size - *pos, header);
3453 list_for_each_entry(cdi, &cdrom_list, list) {
3456 ret = scnprintf(info + *pos, max_size - *pos,
3460 ret = scnprintf(info + *pos, max_size - *pos,
3461 "\t%d", cdi->speed);
3464 ret = scnprintf(info + *pos, max_size - *pos,
3465 "\t%d", cdi->capacity);
3467 case CTL_CAPABILITY:
3468 ret = scnprintf(info + *pos, max_size - *pos,
3469 "\t%d", CDROM_CAN(val) != 0);
3472 pr_info("invalid option%d\n", option);
3483 static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3484 void __user *buffer, size_t *lenp, loff_t *ppos)
3487 char *info = cdrom_sysctl_settings.info;
3488 const int max_size = sizeof(cdrom_sysctl_settings.info);
3490 if (!*lenp || (*ppos && !write)) {
3495 mutex_lock(&cdrom_mutex);
3497 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3499 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3501 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3503 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3505 if (cdrom_print_info("\nCan close tray:\t",
3506 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3508 if (cdrom_print_info("\nCan open tray:\t",
3509 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3511 if (cdrom_print_info("\nCan lock tray:\t",
3512 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3514 if (cdrom_print_info("\nCan change speed:",
3515 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3517 if (cdrom_print_info("\nCan select disk:",
3518 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3520 if (cdrom_print_info("\nCan read multisession:",
3521 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3523 if (cdrom_print_info("\nCan read MCN:\t",
3524 CDC_MCN, info, &pos, CTL_CAPABILITY))
3526 if (cdrom_print_info("\nReports media changed:",
3527 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3529 if (cdrom_print_info("\nCan play audio:\t",
3530 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3532 if (cdrom_print_info("\nCan write CD-R:\t",
3533 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3535 if (cdrom_print_info("\nCan write CD-RW:",
3536 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3538 if (cdrom_print_info("\nCan read DVD:\t",
3539 CDC_DVD, info, &pos, CTL_CAPABILITY))
3541 if (cdrom_print_info("\nCan write DVD-R:",
3542 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3544 if (cdrom_print_info("\nCan write DVD-RAM:",
3545 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3547 if (cdrom_print_info("\nCan read MRW:\t",
3548 CDC_MRW, info, &pos, CTL_CAPABILITY))
3550 if (cdrom_print_info("\nCan write MRW:\t",
3551 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3553 if (cdrom_print_info("\nCan write RAM:\t",
3554 CDC_RAM, info, &pos, CTL_CAPABILITY))
3556 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3559 mutex_unlock(&cdrom_mutex);
3560 return proc_dostring(ctl, write, buffer, lenp, ppos);
3562 pr_info("info buffer too small\n");
3566 /* Unfortunately, per device settings are not implemented through
3567 procfs/sysctl yet. When they are, this will naturally disappear. For now
3568 just update all drives. Later this will become the template on which
3569 new registered drives will be based. */
3570 static void cdrom_update_settings(void)
3572 struct cdrom_device_info *cdi;
3574 mutex_lock(&cdrom_mutex);
3575 list_for_each_entry(cdi, &cdrom_list, list) {
3576 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3577 cdi->options |= CDO_AUTO_CLOSE;
3578 else if (!autoclose)
3579 cdi->options &= ~CDO_AUTO_CLOSE;
3580 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3581 cdi->options |= CDO_AUTO_EJECT;
3582 else if (!autoeject)
3583 cdi->options &= ~CDO_AUTO_EJECT;
3584 if (lockdoor && CDROM_CAN(CDC_LOCK))
3585 cdi->options |= CDO_LOCK;
3587 cdi->options &= ~CDO_LOCK;
3588 if (check_media_type)
3589 cdi->options |= CDO_CHECK_TYPE;
3591 cdi->options &= ~CDO_CHECK_TYPE;
3593 mutex_unlock(&cdrom_mutex);
3596 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3597 void __user *buffer, size_t *lenp, loff_t *ppos)
3601 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3605 /* we only care for 1 or 0. */
3606 autoclose = !!cdrom_sysctl_settings.autoclose;
3607 autoeject = !!cdrom_sysctl_settings.autoeject;
3608 debug = !!cdrom_sysctl_settings.debug;
3609 lockdoor = !!cdrom_sysctl_settings.lock;
3610 check_media_type = !!cdrom_sysctl_settings.check;
3612 /* update the option flags according to the changes. we
3613 don't have per device options through sysctl yet,
3614 but we will have and then this will disappear. */
3615 cdrom_update_settings();
3621 /* Place files in /proc/sys/dev/cdrom */
3622 static struct ctl_table cdrom_table[] = {
3625 .data = &cdrom_sysctl_settings.info,
3626 .maxlen = CDROM_STR_SIZE,
3628 .proc_handler = cdrom_sysctl_info,
3631 .procname = "autoclose",
3632 .data = &cdrom_sysctl_settings.autoclose,
3633 .maxlen = sizeof(int),
3635 .proc_handler = cdrom_sysctl_handler,
3638 .procname = "autoeject",
3639 .data = &cdrom_sysctl_settings.autoeject,
3640 .maxlen = sizeof(int),
3642 .proc_handler = cdrom_sysctl_handler,
3645 .procname = "debug",
3646 .data = &cdrom_sysctl_settings.debug,
3647 .maxlen = sizeof(int),
3649 .proc_handler = cdrom_sysctl_handler,
3653 .data = &cdrom_sysctl_settings.lock,
3654 .maxlen = sizeof(int),
3656 .proc_handler = cdrom_sysctl_handler,
3659 .procname = "check_media",
3660 .data = &cdrom_sysctl_settings.check,
3661 .maxlen = sizeof(int),
3663 .proc_handler = cdrom_sysctl_handler
3668 static struct ctl_table cdrom_cdrom_table[] = {
3670 .procname = "cdrom",
3673 .child = cdrom_table,
3678 /* Make sure that /proc/sys/dev is there */
3679 static struct ctl_table cdrom_root_table[] = {
3684 .child = cdrom_cdrom_table,
3688 static struct ctl_table_header *cdrom_sysctl_header;
3690 static void cdrom_sysctl_register(void)
3692 static int initialized;
3694 if (initialized == 1)
3697 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3699 /* set the defaults */
3700 cdrom_sysctl_settings.autoclose = autoclose;
3701 cdrom_sysctl_settings.autoeject = autoeject;
3702 cdrom_sysctl_settings.debug = debug;
3703 cdrom_sysctl_settings.lock = lockdoor;
3704 cdrom_sysctl_settings.check = check_media_type;
3709 static void cdrom_sysctl_unregister(void)
3711 if (cdrom_sysctl_header)
3712 unregister_sysctl_table(cdrom_sysctl_header);
3715 #else /* CONFIG_SYSCTL */
3717 static void cdrom_sysctl_register(void)
3721 static void cdrom_sysctl_unregister(void)
3725 #endif /* CONFIG_SYSCTL */
3727 static int __init cdrom_init(void)
3729 cdrom_sysctl_register();
3734 static void __exit cdrom_exit(void)
3736 pr_info("Uniform CD-ROM driver unloaded\n");
3737 cdrom_sysctl_unregister();
3740 module_init(cdrom_init);
3741 module_exit(cdrom_exit);
3742 MODULE_LICENSE("GPL");