1 /* linux/drivers/cdrom/cdrom.c
2 Copyright (c) 1996, 1997 David A. van Leeuwen.
3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
6 May be copied or modified under the terms of the GNU General Public
7 License. See linux/COPYING for more information.
9 Uniform CD-ROM driver for Linux.
10 See Documentation/cdrom/cdrom-standard.tex for usage information.
12 The routines in the file provide a uniform interface between the
13 software that uses CD-ROMs and the various low-level drivers that
14 actually talk to the hardware. Suggestions are welcome.
15 Patches that work are more welcome though. ;-)
18 ----------------------------------
20 -- Modify sysctl/proc interface. I plan on having one directory per
21 drive, with entries for outputing general drive information, and sysctl
22 based tunable parameters such as whether the tray should auto-close for
23 that drive. Suggestions (or patches) for this welcome!
27 ----------------------------------
28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
29 -- Initial version by David A. van Leeuwen. I don't have a detailed
30 changelog for the 1.x series, David?
32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
33 -- New maintainer! As David A. van Leeuwen has been too busy to actively
34 maintain and improve this driver, I am now carrying on the torch. If
35 you have a problem with this driver, please feel free to contact me.
37 -- Added (rudimentary) sysctl interface. I realize this is really weak
38 right now, and is _very_ badly implemented. It will be improved...
40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into
41 the Uniform CD-ROM driver via the cdrom_count_tracks function.
42 The cdrom_count_tracks function helps resolve some of the false
43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
44 for the correct media type when mounting or playing audio from a CD.
46 -- Remove the calls to verify_area and only use the copy_from_user and
47 copy_to_user stuff, since these calls now provide their own memory
48 checking with the 2.1.x kernels.
50 -- Major update to return codes so that errors from low-level drivers
51 are passed on through (thanks to Gerd Knorr for pointing out this
54 -- Made it so if a function isn't implemented in a low-level driver,
55 ENOSYS is now returned instead of EINVAL.
57 -- Simplified some complex logic so that the source code is easier to read.
59 -- Other stuff I probably forgot to mention (lots of changes).
61 2.01 to 2.11 Dec 1997-Jan 1998
62 -- TO-DO! Write changelogs for 2.01 to 2.12.
64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
66 copy_*_user does not return EFAULT on error, but instead returns the number
67 of bytes not copied. I was returning whatever non-zero stuff came back from
68 the copy_*_user functions directly, which would result in strange errors.
70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
73 this out and providing a simple fix.
74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
75 thanks to Andrea Arcangeli
76 -- Fixed it so that the /proc entry now also shows up when cdrom is
77 compiled into the kernel. Before it only worked when loaded as a module.
79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
80 -- Fixed a bug in cdrom_media_changed and handling of reporting that
81 the media had changed for devices that _don't_ implement media_changed.
82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
83 -- Made a few things more pedanticly correct.
85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
86 -- New maintainers! Erik was too busy to continue the work on the driver,
87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
88 will do their best to follow in his footsteps
90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
91 -- Check if drive is capable of doing what we ask before blindly changing
92 cdi->options in various ioctl.
93 -- Added version to proc entry.
95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
96 -- Fixed an error in open_for_data where we would sometimes not return
97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
98 -- Fixed module usage count - usage was based on /proc/sys/dev
99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other
100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where
101 dev would be removed even though it was used. cdrom.c just illuminated
104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
106 been "rewritten" because capabilities and options aren't in sync. They
108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
109 -- Added CDROM_RESET ioctl.
110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
112 from parsing /proc/sys/dev/cdrom/info.
114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
115 -- Check capability mask from low level driver when counting tracks as
116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
121 -- proc info didn't mask against capabilities mask.
123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
125 code was duplicated before. Drives that support the generic packet
126 interface are now being fed packets from here instead.
127 -- First attempt at adding support for MMC2 commands - for DVD and
128 CD-R(W) drives. Only the DVD parts are in now - the interface used is
129 the same as for the audio ioctls.
130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get
131 a change to perform device specific ioctls as well.
132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
133 -- Put in sysctl files for autoclose, autoeject, check_media, debug,
135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about
136 CD-Rx and DVD capabilities.
137 -- Now default to checking media type.
138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
139 doing this anyway, with the generic_packet addition.
141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
142 -- Fix up the sysctl handling so that the option flags get set
144 -- Fix up ioctl handling so the device specific ones actually get
147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
148 -- Fixed volume control on SCSI drives (or others with longer audio
150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
151 <andrewtv@usa.net> for telling me and for having defined the various
152 DVD structures and ioctls in the first place! He designed the original
153 DVD patches for ide-cd and while I rearranged and unified them, the
154 interface is still the same.
156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
159 -- Moved the CDROMREADxxx ioctls in here.
160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
161 and exported functions.
162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
163 to now read GPCMD_ for the new generic packet interface. All low level
164 drivers are updated as well.
165 -- Various other cleanups.
167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
168 -- Fixed a couple of possible memory leaks (if an operation failed and
169 we didn't free the buffer before returning the error).
170 -- Integrated Uniform CD Changer handling from Richard Sharman
171 <rsharman@pobox.com>.
172 -- Defined CD_DVD and CD_CHANGER log levels.
173 -- Fixed the CDROMREADxxx ioctls.
174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
175 drives supported it. We lose the index part, however.
176 -- Small modifications to accommodate opens of /dev/hdc1, required
177 for ide-cd to handle multisession discs.
178 -- Export cdrom_mode_sense and cdrom_mode_select.
179 -- init_cdrom_command() for setting up a cgc command.
181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
183 impossible to send the drive data in a sensible way.
184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
186 -- Added setup of write mode for packet writing.
187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
188 number of frames and split the reads in blocks of 8.
190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
191 -- Added support for changing the region of DVD drives.
192 -- Added sense data to generic command.
194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
195 -- Do same "read header length" trick in cdrom_get_disc_info() as
196 we do in cdrom_get_track_info() -- some drive don't obey specs and
197 fail if they can't supply the full Mt Fuji size table.
198 -- Deleted stuff related to setting up write modes. It has a different
200 -- Clear header length in mode_select unconditionally.
201 -- Removed the register_disk() that was added, not needed here.
203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
204 -- Fix direction flag in setup_send_key and setup_report_key. This
205 gave some SCSI adapters problems.
206 -- Always return -EROFS for write opens
207 -- Convert to module_init/module_exit style init and remove some
208 of the #ifdef MODULE stuff
209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command
212 did not clear a 0 sized buffer.
214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
216 that case switch block size and issue plain READ_10 again, then switch
219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
220 -- Fix volume control on CD's - old SCSI-II drives now use their own
221 code, as doing MODE6 stuff in here is really not my intention.
222 -- Use READ_DISC_INFO for more reliable end-of-disc.
224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
225 -- Fix bug in getting rpc phase 2 region info.
226 -- Reinstate "correct" CDROMPLAYTRKIND
228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
229 -- Use quiet bit on packet commands not known to work
231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
232 -- Various fixes and lots of cleanups not listed :-)
234 -- Mt Rainier support
235 -- DVD-RAM write open fixes
237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
243 -------------------------------------------------------------------------*/
245 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
247 #define REVISION "Revision: 3.20"
248 #define VERSION "Id: cdrom.c 3.20 2003/12/17"
250 /* I use an error-log mask to give fine grain control over the type of
251 messages dumped to the system logs. The available masks include: */
252 #define CD_NOTHING 0x0
253 #define CD_WARNING 0x1
254 #define CD_REG_UNREG 0x2
255 #define CD_DO_IOCTL 0x4
257 #define CD_CLOSE 0x10
258 #define CD_COUNT_TRACKS 0x20
259 #define CD_CHANGER 0x40
262 /* Define this to remove _all_ the debugging messages */
263 /* #define ERRLOGMASK CD_NOTHING */
264 #define ERRLOGMASK CD_WARNING
265 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
266 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
268 #include <linux/atomic.h>
269 #include <linux/module.h>
270 #include <linux/fs.h>
271 #include <linux/major.h>
272 #include <linux/types.h>
273 #include <linux/errno.h>
274 #include <linux/kernel.h>
275 #include <linux/mm.h>
276 #include <linux/slab.h>
277 #include <linux/cdrom.h>
278 #include <linux/sysctl.h>
279 #include <linux/proc_fs.h>
280 #include <linux/blkpg.h>
281 #include <linux/init.h>
282 #include <linux/fcntl.h>
283 #include <linux/blkdev.h>
284 #include <linux/times.h>
286 #include <asm/uaccess.h>
288 /* used to tell the module to turn on full debugging messages */
290 /* default compatibility mode */
291 static bool autoclose=1;
292 static bool autoeject;
293 static bool lockdoor = 1;
294 /* will we ever get to use this... sigh. */
295 static bool check_media_type;
296 /* automatically restart mrw format */
297 static bool mrw_format_restart = 1;
298 module_param(debug, bool, 0);
299 module_param(autoclose, bool, 0);
300 module_param(autoeject, bool, 0);
301 module_param(lockdoor, bool, 0);
302 module_param(check_media_type, bool, 0);
303 module_param(mrw_format_restart, bool, 0);
305 static DEFINE_MUTEX(cdrom_mutex);
307 static const char *mrw_format_status[] = {
314 static const char *mrw_address_space[] = { "DMA", "GAA" };
316 #if (ERRLOGMASK != CD_NOTHING)
317 #define cd_dbg(type, fmt, ...) \
319 if ((ERRLOGMASK & type) || debug == 1) \
320 pr_debug(fmt, ##__VA_ARGS__); \
323 #define cd_dbg(type, fmt, ...) \
325 if (0 && (ERRLOGMASK & type) || debug == 1) \
326 pr_debug(fmt, ##__VA_ARGS__); \
330 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
331 a lot of places. This macro makes the code more clear. */
332 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
335 * Another popular OS uses 7 seconds as the hard timeout for default
336 * commands, so it is a good choice for us as well.
338 #define CDROM_DEF_TIMEOUT (7 * HZ)
340 /* Not-exported routines. */
342 static void cdrom_sysctl_register(void);
344 static LIST_HEAD(cdrom_list);
346 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
347 struct packet_command *cgc)
350 cgc->sense->sense_key = 0x05;
351 cgc->sense->asc = 0x20;
352 cgc->sense->ascq = 0x00;
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 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 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);
615 cdi->options = CDO_USE_FFLAGS;
617 if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
618 cdi->options |= (int) CDO_AUTO_CLOSE;
619 if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
620 cdi->options |= (int) CDO_AUTO_EJECT;
622 cdi->options |= (int) CDO_LOCK;
623 if (check_media_type == 1)
624 cdi->options |= (int) CDO_CHECK_TYPE;
626 if (CDROM_CAN(CDC_MRW_W))
627 cdi->exit = cdrom_mrw_exit;
630 cdi->cdda_method = CDDA_BPC_FULL;
632 cdi->cdda_method = CDDA_OLD;
634 if (!cdo->generic_packet)
635 cdo->generic_packet = cdrom_dummy_generic_packet;
637 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
638 mutex_lock(&cdrom_mutex);
639 list_add(&cdi->list, &cdrom_list);
640 mutex_unlock(&cdrom_mutex);
645 void unregister_cdrom(struct cdrom_device_info *cdi)
647 cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
649 mutex_lock(&cdrom_mutex);
650 list_del(&cdi->list);
651 mutex_unlock(&cdrom_mutex);
656 cdi->ops->n_minors--;
657 cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
660 int cdrom_get_media_event(struct cdrom_device_info *cdi,
661 struct media_event_desc *med)
663 struct packet_command cgc;
664 unsigned char buffer[8];
665 struct event_header *eh = (struct event_header *)buffer;
667 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
668 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
669 cgc.cmd[1] = 1; /* IMMED */
670 cgc.cmd[4] = 1 << 4; /* media event */
671 cgc.cmd[8] = sizeof(buffer);
674 if (cdi->ops->generic_packet(cdi, &cgc))
677 if (be16_to_cpu(eh->data_len) < sizeof(*med))
680 if (eh->nea || eh->notification_class != 0x4)
683 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
687 static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
688 struct rwrt_feature_desc *rfd)
690 struct packet_command cgc;
694 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
696 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
697 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
698 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
701 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
704 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
708 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
710 struct packet_command cgc;
712 __be16 *feature_code;
715 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
717 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
718 cgc.cmd[3] = CDF_HWDM;
719 cgc.cmd[8] = sizeof(buffer);
722 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
725 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
726 if (be16_to_cpu(*feature_code) == CDF_HWDM)
733 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
735 struct rwrt_feature_desc rfd;
740 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
743 if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
749 static int cdrom_media_erasable(struct cdrom_device_info *cdi)
754 ret = cdrom_get_disc_info(cdi, &di);
755 if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
762 * FIXME: check RO bit
764 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
766 int ret = cdrom_media_erasable(cdi);
769 * allow writable open if media info read worked and media is
770 * erasable, _or_ if it fails since not all drives support it
778 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
784 * always reset to DMA lba space on open
786 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
787 pr_err("failed setting lba address space\n");
791 ret = cdrom_get_disc_info(cdi, &di);
792 if (ret < 0 || ret < offsetof(typeof(di),disc_type))
800 * 0 - not MRW formatted
801 * 1 - MRW bgformat started, but not running or complete
802 * 2 - MRW bgformat in progress
803 * 3 - MRW formatting complete
806 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
809 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
811 ret = cdrom_mrw_bgformat(cdi, 1);
816 static int mo_open_write(struct cdrom_device_info *cdi)
818 struct packet_command cgc;
822 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
826 * obtain write protect information as per
827 * drivers/scsi/sd.c:sd_read_write_protect_flag
830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
835 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
838 /* drive gave us no info, let the user go ahead */
842 return buffer[3] & 0x80;
845 static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
847 struct rwrt_feature_desc rfd;
850 if ((ret = cdrom_has_defect_mgt(cdi)))
853 if ((ret = cdrom_get_random_writable(cdi, &rfd)))
855 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
858 cd_dbg(CD_OPEN, "can open for random write\n");
862 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
864 struct packet_command cgc;
866 int ret, mmc3_profile;
868 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
870 cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
872 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
873 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
876 if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
877 mmc3_profile = 0xffff;
879 mmc3_profile = (buffer[6] << 8) | buffer[7];
881 cdi->mmc3_profile = mmc3_profile;
884 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
886 switch (cdi->mmc3_profile) {
887 case 0x12: /* DVD-RAM */
888 case 0x1A: /* DVD+RW */
889 case 0x43: /* BD-RE */
897 * returns 0 for ok to open write, non-0 to disallow
899 static int cdrom_open_write(struct cdrom_device_info *cdi)
901 int mrw, mrw_write, ram_write;
905 if (!cdrom_is_mrw(cdi, &mrw_write))
908 if (CDROM_CAN(CDC_MO_DRIVE))
911 (void) cdrom_is_random_writable(cdi, &ram_write);
914 cdi->mask &= ~CDC_MRW;
916 cdi->mask |= CDC_MRW;
919 cdi->mask &= ~CDC_MRW_W;
921 cdi->mask |= CDC_MRW_W;
924 cdi->mask &= ~CDC_RAM;
926 cdi->mask |= CDC_RAM;
928 if (CDROM_CAN(CDC_MRW_W))
929 ret = cdrom_mrw_open_write(cdi);
930 else if (CDROM_CAN(CDC_DVD_RAM))
931 ret = cdrom_dvdram_open_write(cdi);
932 else if (CDROM_CAN(CDC_RAM) &&
933 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
934 ret = cdrom_ram_open_write(cdi);
935 else if (CDROM_CAN(CDC_MO_DRIVE))
936 ret = mo_open_write(cdi);
937 else if (!cdrom_is_dvd_rw(cdi))
943 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
945 struct packet_command cgc;
947 if (cdi->mmc3_profile != 0x1a) {
948 cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
952 if (!cdi->media_written) {
953 cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
957 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
959 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
960 cgc.cmd[0] = GPCMD_FLUSH_CACHE;
962 cdi->ops->generic_packet(cdi, &cgc);
964 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
965 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
966 cgc.timeout = 3000*HZ;
968 cdi->ops->generic_packet(cdi, &cgc);
970 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
971 cgc.cmd[0] = GPCMD_CLOSE_TRACK;
972 cgc.cmd[2] = 2; /* Close session */
974 cgc.timeout = 3000*HZ;
975 cdi->ops->generic_packet(cdi, &cgc);
977 cdi->media_written = 0;
980 static int cdrom_close_write(struct cdrom_device_info *cdi)
983 return cdrom_flush_cache(cdi);
989 /* badly broken, I know. Is due for a fixup anytime. */
990 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
992 struct cdrom_tochdr header;
993 struct cdrom_tocentry entry;
1000 cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
1002 if (!CDROM_CAN(CDC_PLAY_AUDIO)) {
1003 tracks->error = CDS_NO_INFO;
1007 /* Grab the TOC header so we can see how many tracks there are */
1008 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
1010 if (ret == -ENOMEDIUM)
1011 tracks->error = CDS_NO_DISC;
1013 tracks->error = CDS_NO_INFO;
1016 /* check what type of tracks are on this disc */
1017 entry.cdte_format = CDROM_MSF;
1018 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
1019 entry.cdte_track = i;
1020 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
1021 tracks->error = CDS_NO_INFO;
1024 if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
1025 if (entry.cdte_format == 0x10)
1027 else if (entry.cdte_format == 0x20)
1034 cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
1035 i, entry.cdte_format, entry.cdte_ctrl);
1037 cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
1038 header.cdth_trk1, tracks->audio, tracks->data,
1039 tracks->cdi, tracks->xa);
1043 int open_for_data(struct cdrom_device_info *cdi)
1046 struct cdrom_device_ops *cdo = cdi->ops;
1048 cd_dbg(CD_OPEN, "entering open_for_data\n");
1049 /* Check if the driver can report drive status. If it can, we
1050 can do clever things. If it can't, well, we at least tried! */
1051 if (cdo->drive_status != NULL) {
1052 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1053 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1054 if (ret == CDS_TRAY_OPEN) {
1055 cd_dbg(CD_OPEN, "the tray is open...\n");
1056 /* can/may i close it? */
1057 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1058 cdi->options & CDO_AUTO_CLOSE) {
1059 cd_dbg(CD_OPEN, "trying to close the tray\n");
1060 ret=cdo->tray_move(cdi,0);
1062 cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
1063 /* Ignore the error from the low
1064 level driver. We don't care why it
1065 couldn't close the tray. We only care
1066 that there is no disc in the drive,
1067 since that is the _REAL_ problem here.*/
1069 goto clean_up_and_return;
1072 cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
1074 goto clean_up_and_return;
1076 /* Ok, the door should be closed now.. Check again */
1077 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1078 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1079 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1080 cd_dbg(CD_OPEN, "tray might not contain a medium\n");
1082 goto clean_up_and_return;
1084 cd_dbg(CD_OPEN, "the tray is now closed\n");
1086 /* the door should be closed now, check for the disc */
1087 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1088 if (ret!=CDS_DISC_OK) {
1090 goto clean_up_and_return;
1093 cdrom_count_tracks(cdi, &tracks);
1094 if (tracks.error == CDS_NO_DISC) {
1095 cd_dbg(CD_OPEN, "bummer. no disc.\n");
1097 goto clean_up_and_return;
1099 /* CD-Players which don't use O_NONBLOCK, workman
1100 * for example, need bit CDO_CHECK_TYPE cleared! */
1101 if (tracks.data==0) {
1102 if (cdi->options & CDO_CHECK_TYPE) {
1103 /* give people a warning shot, now that CDO_CHECK_TYPE
1104 is the default case! */
1105 cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
1106 cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
1107 (unsigned int)task_pid_nr(current));
1109 goto clean_up_and_return;
1112 cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
1116 cd_dbg(CD_OPEN, "all seems well, opening the devicen");
1118 /* all seems well, we can open the device */
1119 ret = cdo->open(cdi, 0); /* open for data */
1120 cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
1121 /* After all this careful checking, we shouldn't have problems
1122 opening the device, but we don't want the device locked if
1123 this somehow fails... */
1125 cd_dbg(CD_OPEN, "open device failed\n");
1126 goto clean_up_and_return;
1128 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
1129 cdo->lock_door(cdi, 1);
1130 cd_dbg(CD_OPEN, "door locked\n");
1132 cd_dbg(CD_OPEN, "device opened successfully\n");
1135 /* Something failed. Try to unlock the drive, because some drivers
1136 (notably ide-cd) lock the drive after every command. This produced
1137 a nasty bug where after mount failed, the drive would remain locked!
1138 This ensures that the drive gets unlocked after a mount fails. This
1139 is a goto to avoid bloating the driver with redundant code. */
1140 clean_up_and_return:
1141 cd_dbg(CD_OPEN, "open failed\n");
1142 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1143 cdo->lock_door(cdi, 0);
1144 cd_dbg(CD_OPEN, "door unlocked\n");
1149 /* We use the open-option O_NONBLOCK to indicate that the
1150 * purpose of opening is only for subsequent ioctl() calls; no device
1151 * integrity checks are performed.
1153 * We hope that all cd-player programs will adopt this convention. It
1154 * is in their own interest: device control becomes a lot easier
1157 int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
1162 cd_dbg(CD_OPEN, "entering cdrom_open\n");
1164 /* if this was a O_NONBLOCK open and we should honor the flags,
1165 * do a quick open without drive/disc integrity checks. */
1167 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
1168 ret = cdi->ops->open(cdi, 1);
1170 ret = open_for_data(cdi);
1173 if (CDROM_CAN(CDC_GENERIC_PACKET))
1174 cdrom_mmc3_profile(cdi);
1175 if (mode & FMODE_WRITE) {
1177 if (cdrom_open_write(cdi))
1179 if (!CDROM_CAN(CDC_RAM))
1182 cdi->media_written = 0;
1189 cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
1190 cdi->name, cdi->use_count);
1193 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
1194 cdi->ops->lock_door(cdi, 0);
1195 cd_dbg(CD_OPEN, "door unlocked\n");
1197 cdi->ops->release(cdi);
1203 /* This code is similar to that in open_for_data. The routine is called
1204 whenever an audio play operation is requested.
1206 static int check_for_audio_disc(struct cdrom_device_info * cdi,
1207 struct cdrom_device_ops * cdo)
1211 cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
1212 if (!(cdi->options & CDO_CHECK_TYPE))
1214 if (cdo->drive_status != NULL) {
1215 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1216 cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
1217 if (ret == CDS_TRAY_OPEN) {
1218 cd_dbg(CD_OPEN, "the tray is open...\n");
1219 /* can/may i close it? */
1220 if (CDROM_CAN(CDC_CLOSE_TRAY) &&
1221 cdi->options & CDO_AUTO_CLOSE) {
1222 cd_dbg(CD_OPEN, "trying to close the tray\n");
1223 ret=cdo->tray_move(cdi,0);
1225 cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
1226 /* Ignore the error from the low
1227 level driver. We don't care why it
1228 couldn't close the tray. We only care
1229 that there is no disc in the drive,
1230 since that is the _REAL_ problem here.*/
1234 cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
1237 /* Ok, the door should be closed now.. Check again */
1238 ret = cdo->drive_status(cdi, CDSL_CURRENT);
1239 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
1240 cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
1243 if (ret!=CDS_DISC_OK) {
1244 cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
1247 cd_dbg(CD_OPEN, "the tray is now closed\n");
1250 cdrom_count_tracks(cdi, &tracks);
1252 return(tracks.error);
1254 if (tracks.audio==0)
1255 return -EMEDIUMTYPE;
1260 void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
1262 struct cdrom_device_ops *cdo = cdi->ops;
1263 int opened_for_data;
1265 cd_dbg(CD_CLOSE, "entering cdrom_release\n");
1267 if (cdi->use_count > 0)
1270 if (cdi->use_count == 0) {
1271 cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
1273 cdrom_dvd_rw_close_write(cdi);
1275 if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
1276 cd_dbg(CD_CLOSE, "Unlocking door!\n");
1277 cdo->lock_door(cdi, 0);
1281 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
1282 !(mode & FMODE_NDELAY);
1285 * flush cache on last write release
1287 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
1288 cdrom_close_write(cdi);
1291 if (cdi->use_count == 0) { /* last process that closes dev*/
1292 if (opened_for_data &&
1293 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
1294 cdo->tray_move(cdi, 1);
1298 static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
1299 struct cdrom_changer_info *buf)
1301 struct packet_command cgc;
1302 struct cdrom_device_ops *cdo = cdi->ops;
1306 * Sanyo changer isn't spec compliant (doesn't use regular change
1307 * LOAD_UNLOAD command, and it doesn't implement the mech status
1310 if (cdi->sanyo_slot) {
1311 buf->hdr.nslots = 3;
1312 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
1313 for (length = 0; length < 3; length++) {
1314 buf->slots[length].disc_present = 1;
1315 buf->slots[length].change = 0;
1320 length = sizeof(struct cdrom_mechstat_header) +
1321 cdi->capacity * sizeof(struct cdrom_slot);
1323 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
1324 cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
1325 cgc.cmd[8] = (length >> 8) & 0xff;
1326 cgc.cmd[9] = length & 0xff;
1327 return cdo->generic_packet(cdi, &cgc);
1330 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
1332 struct cdrom_changer_info *info;
1335 cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
1336 if (cdi->sanyo_slot)
1339 info = kmalloc(sizeof(*info), GFP_KERNEL);
1343 if ((ret = cdrom_read_mech_status(cdi, info)))
1346 if (info->slots[slot].disc_present)
1356 /* Return the number of slots for an ATAPI/SCSI cdrom,
1357 * return 1 if not a changer.
1359 int cdrom_number_of_slots(struct cdrom_device_info *cdi)
1363 struct cdrom_changer_info *info;
1365 cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
1366 /* cdrom_read_mech_status requires a valid value for capacity: */
1369 info = kmalloc(sizeof(*info), GFP_KERNEL);
1373 if ((status = cdrom_read_mech_status(cdi, info)) == 0)
1374 nslots = info->hdr.nslots;
1381 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
1382 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
1384 struct packet_command cgc;
1386 cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
1387 if (cdi->sanyo_slot && slot < 0)
1390 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
1391 cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
1392 cgc.cmd[4] = 2 + (slot >= 0);
1394 cgc.timeout = 60 * HZ;
1396 /* The Sanyo 3 CD changer uses byte 7 of the
1397 GPCMD_TEST_UNIT_READY to command to switch CDs instead of
1398 using the GPCMD_LOAD_UNLOAD opcode. */
1399 if (cdi->sanyo_slot && -1 < slot) {
1400 cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
1402 cgc.cmd[4] = cgc.cmd[8] = 0;
1403 cdi->sanyo_slot = slot ? slot : 3;
1406 return cdi->ops->generic_packet(cdi, &cgc);
1409 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
1411 struct cdrom_changer_info *info;
1415 cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
1416 if (!CDROM_CAN(CDC_SELECT_DISC))
1417 return -EDRIVE_CANT_DO_THIS;
1419 if (cdi->ops->check_events)
1420 cdi->ops->check_events(cdi, 0, slot);
1422 cdi->ops->media_changed(cdi, slot);
1424 if (slot == CDSL_NONE) {
1425 /* set media changed bits, on both queues */
1426 cdi->mc_flags = 0x3;
1427 return cdrom_load_unload(cdi, -1);
1430 info = kmalloc(sizeof(*info), GFP_KERNEL);
1434 if ((ret = cdrom_read_mech_status(cdi, info))) {
1439 curslot = info->hdr.curslot;
1442 if (cdi->use_count > 1 || cdi->keeplocked) {
1443 if (slot == CDSL_CURRENT) {
1450 /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
1451 which is useful if it had been previously unloaded.
1452 Whether it can or not, it returns the current slot.
1453 Similarly, if slot happens to be the current one, we still
1455 if (slot == CDSL_CURRENT)
1458 /* set media changed bits on both queues */
1459 cdi->mc_flags = 0x3;
1460 if ((ret = cdrom_load_unload(cdi, slot)))
1467 * As cdrom implements an extra ioctl consumer for media changed
1468 * event, it needs to buffer ->check_events() output, such that event
1469 * is not lost for both the usual VFS and ioctl paths.
1470 * cdi->{vfs|ioctl}_events are used to buffer pending events for each
1473 * XXX: Locking is non-existent. cdi->ops->check_events() can be
1474 * called in parallel and buffering fields are accessed without any
1475 * exclusion. The original media_changed code had the same problem.
1476 * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
1477 * and remove this cruft altogether. It doesn't have much usefulness
1480 static void cdrom_update_events(struct cdrom_device_info *cdi,
1481 unsigned int clearing)
1483 unsigned int events;
1485 events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
1486 cdi->vfs_events |= events;
1487 cdi->ioctl_events |= events;
1490 unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
1491 unsigned int clearing)
1493 unsigned int events;
1495 cdrom_update_events(cdi, clearing);
1496 events = cdi->vfs_events;
1497 cdi->vfs_events = 0;
1500 EXPORT_SYMBOL(cdrom_check_events);
1502 /* We want to make media_changed accessible to the user through an
1503 * ioctl. The main problem now is that we must double-buffer the
1504 * low-level implementation, to assure that the VFS and the user both
1505 * see a medium change once.
1509 int media_changed(struct cdrom_device_info *cdi, int queue)
1511 unsigned int mask = (1 << (queue & 1));
1512 int ret = !!(cdi->mc_flags & mask);
1515 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1518 /* changed since last call? */
1519 if (cdi->ops->check_events) {
1520 BUG_ON(!queue); /* shouldn't be called from VFS path */
1521 cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
1522 changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
1523 cdi->ioctl_events = 0;
1525 changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
1528 cdi->mc_flags = 0x3; /* set bit on both queues */
1530 cdi->media_written = 0;
1533 cdi->mc_flags &= ~mask; /* clear bit */
1537 int cdrom_media_changed(struct cdrom_device_info *cdi)
1539 /* This talks to the VFS, which doesn't like errors - just 1 or 0.
1540 * Returning "0" is always safe (media hasn't been changed). Do that
1541 * if the low-level cdrom driver dosn't support media changed. */
1542 if (cdi == NULL || cdi->ops->media_changed == NULL)
1544 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
1546 return media_changed(cdi, 0);
1549 /* Requests to the low-level drivers will /always/ be done in the
1550 following format convention:
1552 CDROM_LBA: all data-related requests.
1553 CDROM_MSF: all audio-related requests.
1555 However, a low-level implementation is allowed to refuse this
1556 request, and return information in its own favorite format.
1558 It doesn't make sense /at all/ to ask for a play_audio in LBA
1559 format, or ask for multi-session info in MSF format. However, for
1560 backward compatibility these format requests will be satisfied, but
1561 the requests to the low-level drivers will be sanitized in the more
1562 meaningful format indicated above.
1566 void sanitize_format(union cdrom_addr *addr,
1567 u_char * curr, u_char requested)
1569 if (*curr == requested)
1570 return; /* nothing to be done! */
1571 if (requested == CDROM_LBA) {
1572 addr->lba = (int) addr->msf.frame +
1573 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
1574 } else { /* CDROM_MSF */
1575 int lba = addr->lba;
1576 addr->msf.frame = lba % 75;
1579 addr->msf.second = lba % 60;
1580 addr->msf.minute = lba / 60;
1585 void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
1588 memset(cgc, 0, sizeof(struct packet_command));
1590 memset(buf, 0, len);
1591 cgc->buffer = (char *) buf;
1593 cgc->data_direction = type;
1594 cgc->timeout = CDROM_DEF_TIMEOUT;
1599 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
1600 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
1602 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
1604 cgc->cmd[0] = GPCMD_REPORT_KEY;
1605 cgc->cmd[10] = type | (agid << 6);
1607 case 0: case 8: case 5: {
1620 cgc->cmd[9] = cgc->buflen;
1621 cgc->data_direction = CGC_DATA_READ;
1624 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
1626 cgc->cmd[0] = GPCMD_SEND_KEY;
1627 cgc->cmd[10] = type | (agid << 6);
1642 cgc->cmd[9] = cgc->buflen;
1643 cgc->data_direction = CGC_DATA_WRITE;
1646 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
1650 struct packet_command cgc;
1651 struct cdrom_device_ops *cdo = cdi->ops;
1652 rpc_state_t rpc_state;
1654 memset(buf, 0, sizeof(buf));
1655 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
1659 case DVD_LU_SEND_AGID:
1660 cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
1662 setup_report_key(&cgc, ai->lsa.agid, 0);
1664 if ((ret = cdo->generic_packet(cdi, &cgc)))
1667 ai->lsa.agid = buf[7] >> 6;
1668 /* Returning data, let host change state */
1671 case DVD_LU_SEND_KEY1:
1672 cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
1673 setup_report_key(&cgc, ai->lsk.agid, 2);
1675 if ((ret = cdo->generic_packet(cdi, &cgc)))
1678 copy_key(ai->lsk.key, &buf[4]);
1679 /* Returning data, let host change state */
1682 case DVD_LU_SEND_CHALLENGE:
1683 cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
1684 setup_report_key(&cgc, ai->lsc.agid, 1);
1686 if ((ret = cdo->generic_packet(cdi, &cgc)))
1689 copy_chal(ai->lsc.chal, &buf[4]);
1690 /* Returning data, let host change state */
1694 case DVD_LU_SEND_TITLE_KEY:
1695 cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
1697 setup_report_key(&cgc, ai->lstk.agid, 4);
1698 cgc.cmd[5] = ai->lstk.lba;
1699 cgc.cmd[4] = ai->lstk.lba >> 8;
1700 cgc.cmd[3] = ai->lstk.lba >> 16;
1701 cgc.cmd[2] = ai->lstk.lba >> 24;
1703 if ((ret = cdo->generic_packet(cdi, &cgc)))
1706 ai->lstk.cpm = (buf[4] >> 7) & 1;
1707 ai->lstk.cp_sec = (buf[4] >> 6) & 1;
1708 ai->lstk.cgms = (buf[4] >> 4) & 3;
1709 copy_key(ai->lstk.title_key, &buf[5]);
1710 /* Returning data, let host change state */
1713 case DVD_LU_SEND_ASF:
1714 cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
1715 setup_report_key(&cgc, ai->lsasf.agid, 5);
1717 if ((ret = cdo->generic_packet(cdi, &cgc)))
1720 ai->lsasf.asf = buf[7] & 1;
1723 /* LU data receive (LU changes state) */
1724 case DVD_HOST_SEND_CHALLENGE:
1725 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
1726 setup_send_key(&cgc, ai->hsc.agid, 1);
1728 copy_chal(&buf[4], ai->hsc.chal);
1730 if ((ret = cdo->generic_packet(cdi, &cgc)))
1733 ai->type = DVD_LU_SEND_KEY1;
1736 case DVD_HOST_SEND_KEY2:
1737 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
1738 setup_send_key(&cgc, ai->hsk.agid, 3);
1740 copy_key(&buf[4], ai->hsk.key);
1742 if ((ret = cdo->generic_packet(cdi, &cgc))) {
1743 ai->type = DVD_AUTH_FAILURE;
1746 ai->type = DVD_AUTH_ESTABLISHED;
1750 case DVD_INVALIDATE_AGID:
1752 cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
1753 setup_report_key(&cgc, ai->lsa.agid, 0x3f);
1754 if ((ret = cdo->generic_packet(cdi, &cgc)))
1758 /* Get region settings */
1759 case DVD_LU_SEND_RPC_STATE:
1760 cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
1761 setup_report_key(&cgc, 0, 8);
1762 memset(&rpc_state, 0, sizeof(rpc_state_t));
1763 cgc.buffer = (char *) &rpc_state;
1765 if ((ret = cdo->generic_packet(cdi, &cgc)))
1768 ai->lrpcs.type = rpc_state.type_code;
1769 ai->lrpcs.vra = rpc_state.vra;
1770 ai->lrpcs.ucca = rpc_state.ucca;
1771 ai->lrpcs.region_mask = rpc_state.region_mask;
1772 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
1775 /* Set region settings */
1776 case DVD_HOST_SEND_RPC_STATE:
1777 cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
1778 setup_send_key(&cgc, 0, 6);
1780 buf[4] = ai->hrpcs.pdrc;
1782 if ((ret = cdo->generic_packet(cdi, &cgc)))
1787 cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
1794 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
1795 struct packet_command *cgc)
1797 unsigned char buf[21], *base;
1798 struct dvd_layer *layer;
1799 struct cdrom_device_ops *cdo = cdi->ops;
1800 int ret, layer_num = s->physical.layer_num;
1802 if (layer_num >= DVD_LAYERS)
1805 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1806 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1807 cgc->cmd[6] = layer_num;
1808 cgc->cmd[7] = s->type;
1809 cgc->cmd[9] = cgc->buflen & 0xff;
1812 * refrain from reporting errors on non-existing layers (mainly)
1816 ret = cdo->generic_packet(cdi, cgc);
1821 layer = &s->physical.layer[layer_num];
1824 * place the data... really ugly, but at least we won't have to
1825 * worry about endianess in userspace.
1827 memset(layer, 0, sizeof(*layer));
1828 layer->book_version = base[0] & 0xf;
1829 layer->book_type = base[0] >> 4;
1830 layer->min_rate = base[1] & 0xf;
1831 layer->disc_size = base[1] >> 4;
1832 layer->layer_type = base[2] & 0xf;
1833 layer->track_path = (base[2] >> 4) & 1;
1834 layer->nlayers = (base[2] >> 5) & 3;
1835 layer->track_density = base[3] & 0xf;
1836 layer->linear_density = base[3] >> 4;
1837 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
1838 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
1839 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
1840 layer->bca = base[16] >> 7;
1845 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
1846 struct packet_command *cgc)
1850 struct cdrom_device_ops *cdo = cdi->ops;
1852 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
1853 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1854 cgc->cmd[6] = s->copyright.layer_num;
1855 cgc->cmd[7] = s->type;
1856 cgc->cmd[8] = cgc->buflen >> 8;
1857 cgc->cmd[9] = cgc->buflen & 0xff;
1859 ret = cdo->generic_packet(cdi, cgc);
1863 s->copyright.cpst = buf[4];
1864 s->copyright.rmi = buf[5];
1869 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
1870 struct packet_command *cgc)
1874 struct cdrom_device_ops *cdo = cdi->ops;
1876 size = sizeof(s->disckey.value) + 4;
1878 buf = kmalloc(size, GFP_KERNEL);
1882 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1883 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1884 cgc->cmd[7] = s->type;
1885 cgc->cmd[8] = size >> 8;
1886 cgc->cmd[9] = size & 0xff;
1887 cgc->cmd[10] = s->disckey.agid << 6;
1889 ret = cdo->generic_packet(cdi, cgc);
1891 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
1897 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
1898 struct packet_command *cgc)
1900 int ret, size = 4 + 188;
1902 struct cdrom_device_ops *cdo = cdi->ops;
1904 buf = kmalloc(size, GFP_KERNEL);
1908 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1909 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1910 cgc->cmd[7] = s->type;
1911 cgc->cmd[9] = cgc->buflen & 0xff;
1913 ret = cdo->generic_packet(cdi, cgc);
1917 s->bca.len = buf[0] << 8 | buf[1];
1918 if (s->bca.len < 12 || s->bca.len > 188) {
1919 cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
1924 memcpy(s->bca.value, &buf[4], s->bca.len);
1931 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
1932 struct packet_command *cgc)
1936 struct cdrom_device_ops *cdo = cdi->ops;
1938 size = sizeof(s->manufact.value) + 4;
1940 buf = kmalloc(size, GFP_KERNEL);
1944 init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
1945 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
1946 cgc->cmd[7] = s->type;
1947 cgc->cmd[8] = size >> 8;
1948 cgc->cmd[9] = size & 0xff;
1950 ret = cdo->generic_packet(cdi, cgc);
1954 s->manufact.len = buf[0] << 8 | buf[1];
1955 if (s->manufact.len < 0) {
1956 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
1960 if (s->manufact.len > 2048) {
1961 cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
1963 s->manufact.len = 2048;
1965 memcpy(s->manufact.value, &buf[4], s->manufact.len);
1973 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
1974 struct packet_command *cgc)
1977 case DVD_STRUCT_PHYSICAL:
1978 return dvd_read_physical(cdi, s, cgc);
1980 case DVD_STRUCT_COPYRIGHT:
1981 return dvd_read_copyright(cdi, s, cgc);
1983 case DVD_STRUCT_DISCKEY:
1984 return dvd_read_disckey(cdi, s, cgc);
1986 case DVD_STRUCT_BCA:
1987 return dvd_read_bca(cdi, s, cgc);
1989 case DVD_STRUCT_MANUFACT:
1990 return dvd_read_manufact(cdi, s, cgc);
1993 cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
1999 int cdrom_mode_sense(struct cdrom_device_info *cdi,
2000 struct packet_command *cgc,
2001 int page_code, int page_control)
2003 struct cdrom_device_ops *cdo = cdi->ops;
2005 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2007 cgc->cmd[0] = GPCMD_MODE_SENSE_10;
2008 cgc->cmd[2] = page_code | (page_control << 6);
2009 cgc->cmd[7] = cgc->buflen >> 8;
2010 cgc->cmd[8] = cgc->buflen & 0xff;
2011 cgc->data_direction = CGC_DATA_READ;
2012 return cdo->generic_packet(cdi, cgc);
2015 int cdrom_mode_select(struct cdrom_device_info *cdi,
2016 struct packet_command *cgc)
2018 struct cdrom_device_ops *cdo = cdi->ops;
2020 memset(cgc->cmd, 0, sizeof(cgc->cmd));
2021 memset(cgc->buffer, 0, 2);
2022 cgc->cmd[0] = GPCMD_MODE_SELECT_10;
2023 cgc->cmd[1] = 0x10; /* PF */
2024 cgc->cmd[7] = cgc->buflen >> 8;
2025 cgc->cmd[8] = cgc->buflen & 0xff;
2026 cgc->data_direction = CGC_DATA_WRITE;
2027 return cdo->generic_packet(cdi, cgc);
2030 static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
2031 struct cdrom_subchnl *subchnl, int mcn)
2033 struct cdrom_device_ops *cdo = cdi->ops;
2034 struct packet_command cgc;
2038 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
2039 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
2040 cgc.cmd[1] = 2; /* MSF addressing */
2041 cgc.cmd[2] = 0x40; /* request subQ data */
2042 cgc.cmd[3] = mcn ? 2 : 1;
2045 if ((ret = cdo->generic_packet(cdi, &cgc)))
2048 subchnl->cdsc_audiostatus = cgc.buffer[1];
2049 subchnl->cdsc_format = CDROM_MSF;
2050 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
2051 subchnl->cdsc_trk = cgc.buffer[6];
2052 subchnl->cdsc_ind = cgc.buffer[7];
2054 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
2055 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
2056 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
2057 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
2058 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
2059 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 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 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;
2177 cdi->last_sense = 0;
2181 if (cdi->cdda_method == CDDA_BPC_SINGLE)
2183 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
2184 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
2186 len = nr * CD_FRAMESIZE_RAW;
2188 rq = blk_get_request(q, READ, GFP_KERNEL);
2193 blk_rq_set_block_pc(rq);
2195 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
2197 blk_put_request(rq);
2201 rq->cmd[0] = GPCMD_READ_CD;
2202 rq->cmd[1] = 1 << 2;
2203 rq->cmd[2] = (lba >> 24) & 0xff;
2204 rq->cmd[3] = (lba >> 16) & 0xff;
2205 rq->cmd[4] = (lba >> 8) & 0xff;
2206 rq->cmd[5] = lba & 0xff;
2207 rq->cmd[6] = (nr >> 16) & 0xff;
2208 rq->cmd[7] = (nr >> 8) & 0xff;
2209 rq->cmd[8] = nr & 0xff;
2213 rq->timeout = 60 * HZ;
2216 if (blk_execute_rq(q, cdi->disk, rq, 0)) {
2217 struct request_sense *s = rq->sense;
2219 cdi->last_sense = s->sense_key;
2222 if (blk_rq_unmap_user(bio))
2224 blk_put_request(rq);
2237 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
2238 int lba, int nframes)
2242 if (cdi->cdda_method == CDDA_OLD)
2243 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2247 * for anything else than success and io error, we need to retry
2249 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
2250 if (!ret || ret != -EIO)
2254 * I've seen drives get sense 4/8/3 udma crc errors on multi
2255 * frame dma, so drop to single frame dma if we need to
2257 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
2258 pr_info("dropping to single frame dma\n");
2259 cdi->cdda_method = CDDA_BPC_SINGLE;
2264 * so we have an io error of some sort with multi frame dma. if the
2265 * condition wasn't a hardware error
2266 * problems, not for any error
2268 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
2271 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
2272 cdi->cdda_method = CDDA_OLD;
2273 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
2276 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
2279 struct cdrom_multisession ms_info;
2280 u8 requested_format;
2283 cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
2285 if (!(cdi->ops->capability & CDC_MULTI_SESSION))
2288 if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
2291 requested_format = ms_info.addr_format;
2292 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2294 ms_info.addr_format = CDROM_LBA;
2296 ret = cdi->ops->get_last_session(cdi, &ms_info);
2300 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
2302 if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
2305 cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
2309 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
2311 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
2313 if (!CDROM_CAN(CDC_OPEN_TRAY))
2315 if (cdi->use_count != 1 || cdi->keeplocked)
2317 if (CDROM_CAN(CDC_LOCK)) {
2318 int ret = cdi->ops->lock_door(cdi, 0);
2323 return cdi->ops->tray_move(cdi, 1);
2326 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
2328 cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
2330 if (!CDROM_CAN(CDC_CLOSE_TRAY))
2332 return cdi->ops->tray_move(cdi, 0);
2335 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
2338 cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
2340 if (!CDROM_CAN(CDC_OPEN_TRAY))
2342 if (cdi->keeplocked)
2345 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
2347 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
2351 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
2354 struct cdrom_changer_info *info;
2357 cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
2359 if (!CDROM_CAN(CDC_MEDIA_CHANGED))
2362 /* cannot select disc or select current disc */
2363 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
2364 return media_changed(cdi, 1);
2366 if (arg >= cdi->capacity)
2369 info = kmalloc(sizeof(*info), GFP_KERNEL);
2373 ret = cdrom_read_mech_status(cdi, info);
2375 ret = info->slots[arg].change;
2380 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
2383 cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
2386 * Options need to be in sync with capability.
2387 * Too late for that, so we have to check each one separately.
2390 case CDO_USE_FFLAGS:
2391 case CDO_CHECK_TYPE:
2394 if (!CDROM_CAN(CDC_LOCK))
2398 return cdi->options;
2399 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
2401 if (!CDROM_CAN(arg))
2404 cdi->options |= (int) arg;
2405 return cdi->options;
2408 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
2411 cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
2413 cdi->options &= ~(int) arg;
2414 return cdi->options;
2417 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
2420 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
2422 if (!CDROM_CAN(CDC_SELECT_SPEED))
2424 return cdi->ops->select_speed(cdi, arg);
2427 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
2430 cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
2432 if (!CDROM_CAN(CDC_SELECT_DISC))
2435 if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
2436 if (arg >= cdi->capacity)
2441 * ->select_disc is a hook to allow a driver-specific way of
2442 * seleting disc. However, since there is no equivalent hook for
2443 * cdrom_slot_status this may not actually be useful...
2445 if (cdi->ops->select_disc)
2446 return cdi->ops->select_disc(cdi, arg);
2448 cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
2449 return cdrom_select_disc(cdi, arg);
2452 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
2453 struct block_device *bdev)
2455 cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
2457 if (!capable(CAP_SYS_ADMIN))
2459 if (!CDROM_CAN(CDC_RESET))
2461 invalidate_bdev(bdev);
2462 return cdi->ops->reset(cdi);
2465 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
2468 cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
2470 if (!CDROM_CAN(CDC_LOCK))
2471 return -EDRIVE_CANT_DO_THIS;
2473 cdi->keeplocked = arg ? 1 : 0;
2476 * Don't unlock the door on multiple opens by default, but allow
2479 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
2481 return cdi->ops->lock_door(cdi, arg);
2484 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
2487 cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
2489 if (!capable(CAP_SYS_ADMIN))
2491 debug = arg ? 1 : 0;
2495 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
2497 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
2498 return (cdi->ops->capability & ~cdi->mask);
2502 * The following function is implemented, although very few audio
2503 * discs give Universal Product Code information, which should just be
2504 * the Medium Catalog Number on the box. Note, that the way the code
2505 * is written on the CD is /not/ uniform across all discs!
2507 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
2510 struct cdrom_mcn mcn;
2513 cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
2515 if (!(cdi->ops->capability & CDC_MCN))
2517 ret = cdi->ops->get_mcn(cdi, &mcn);
2521 if (copy_to_user(argp, &mcn, sizeof(mcn)))
2523 cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
2527 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
2530 cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
2532 if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
2534 if (!CDROM_CAN(CDC_SELECT_DISC) ||
2535 (arg == CDSL_CURRENT || arg == CDSL_NONE))
2536 return cdi->ops->drive_status(cdi, CDSL_CURRENT);
2537 if (arg >= cdi->capacity)
2539 return cdrom_slot_status(cdi, arg);
2543 * Ok, this is where problems start. The current interface for the
2544 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
2545 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
2546 * is often the case, it is also very common for CDs to have some tracks
2547 * with data, and some tracks with audio. Just because I feel like it,
2548 * I declare the following to be the best way to cope. If the CD has ANY
2549 * data tracks on it, it will be returned as a data CD. If it has any XA
2550 * tracks, I will return it as that. Now I could simplify this interface
2551 * by combining these returns with the above, but this more clearly
2552 * demonstrates the problem with the current interface. Too bad this
2553 * wasn't designed to use bitmasks... -Erik
2555 * Well, now we have the option CDS_MIXED: a mixed-type CD.
2556 * User level programmers might feel the ioctl is not very useful.
2559 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
2563 cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
2565 cdrom_count_tracks(cdi, &tracks);
2567 return tracks.error;
2569 /* Policy mode on */
2570 if (tracks.audio > 0) {
2571 if (!tracks.data && !tracks.cdi && !tracks.xa)
2581 if (tracks.data > 0)
2583 /* Policy mode off */
2585 cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
2589 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
2591 cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
2592 return cdi->capacity;
2595 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
2598 struct cdrom_subchnl q;
2602 /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
2604 if (copy_from_user(&q, argp, sizeof(q)))
2607 requested = q.cdsc_format;
2608 if (requested != CDROM_MSF && requested != CDROM_LBA)
2610 q.cdsc_format = CDROM_MSF;
2612 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
2616 back = q.cdsc_format; /* local copy */
2617 sanitize_format(&q.cdsc_absaddr, &back, requested);
2618 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
2620 if (copy_to_user(argp, &q, sizeof(q)))
2622 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
2626 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
2629 struct cdrom_tochdr header;
2632 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
2634 if (copy_from_user(&header, argp, sizeof(header)))
2637 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
2641 if (copy_to_user(argp, &header, sizeof(header)))
2643 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
2647 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
2650 struct cdrom_tocentry entry;
2651 u8 requested_format;
2654 /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
2656 if (copy_from_user(&entry, argp, sizeof(entry)))
2659 requested_format = entry.cdte_format;
2660 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
2662 /* make interface to low-level uniform */
2663 entry.cdte_format = CDROM_MSF;
2664 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
2667 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
2669 if (copy_to_user(argp, &entry, sizeof(entry)))
2671 /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
2675 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
2678 struct cdrom_msf msf;
2680 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
2682 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2684 if (copy_from_user(&msf, argp, sizeof(msf)))
2686 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
2689 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
2695 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
2697 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2699 if (copy_from_user(&ti, argp, sizeof(ti)))
2702 ret = check_for_audio_disc(cdi, cdi->ops);
2705 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
2707 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
2710 struct cdrom_volctrl volume;
2712 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
2714 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2716 if (copy_from_user(&volume, argp, sizeof(volume)))
2718 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
2721 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
2724 struct cdrom_volctrl volume;
2727 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
2729 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2732 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
2736 if (copy_to_user(argp, &volume, sizeof(volume)))
2741 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
2746 cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
2748 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2750 ret = check_for_audio_disc(cdi, cdi->ops);
2753 return cdi->ops->audio_ioctl(cdi, cmd, NULL);
2757 * Required when we need to use READ_10 to issue other than 2048 block
2760 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
2762 struct cdrom_device_ops *cdo = cdi->ops;
2763 struct packet_command cgc;
2764 struct modesel_head mh;
2766 memset(&mh, 0, sizeof(mh));
2767 mh.block_desc_length = 0x08;
2768 mh.block_length_med = (size >> 8) & 0xff;
2769 mh.block_length_lo = size & 0xff;
2771 memset(&cgc, 0, sizeof(cgc));
2773 cgc.cmd[1] = 1 << 4;
2775 cgc.buflen = sizeof(mh);
2776 cgc.buffer = (char *) &mh;
2777 cgc.data_direction = CGC_DATA_WRITE;
2778 mh.block_desc_length = 0x08;
2779 mh.block_length_med = (size >> 8) & 0xff;
2780 mh.block_length_lo = size & 0xff;
2782 return cdo->generic_packet(cdi, &cgc);
2785 static int cdrom_get_track_info(struct cdrom_device_info *cdi,
2786 __u16 track, __u8 type, track_information *ti)
2788 struct cdrom_device_ops *cdo = cdi->ops;
2789 struct packet_command cgc;
2792 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
2793 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
2794 cgc.cmd[1] = type & 3;
2795 cgc.cmd[4] = (track & 0xff00) >> 8;
2796 cgc.cmd[5] = track & 0xff;
2800 ret = cdo->generic_packet(cdi, &cgc);
2804 buflen = be16_to_cpu(ti->track_information_length) +
2805 sizeof(ti->track_information_length);
2807 if (buflen > sizeof(track_information))
2808 buflen = sizeof(track_information);
2810 cgc.cmd[8] = cgc.buflen = buflen;
2811 ret = cdo->generic_packet(cdi, &cgc);
2815 /* return actual fill size */
2819 /* return the last written block on the CD-R media. this is for the udf
2821 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
2823 struct cdrom_tocentry toc;
2824 disc_information di;
2825 track_information ti;
2827 int ret = -1, ti_size;
2829 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2832 ret = cdrom_get_disc_info(cdi, &di);
2833 if (ret < (int)(offsetof(typeof(di), last_track_lsb)
2834 + sizeof(di.last_track_lsb)))
2837 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2838 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2839 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2840 if (ti_size < (int)offsetof(typeof(ti), track_start))
2843 /* if this track is blank, try the previous. */
2845 if (last_track == 1)
2848 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2851 if (ti_size < (int)(offsetof(typeof(ti), track_size)
2852 + sizeof(ti.track_size)))
2855 /* if last recorded field is valid, return it. */
2856 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
2857 + sizeof(ti.last_rec_address))) {
2858 *last_written = be32_to_cpu(ti.last_rec_address);
2860 /* make it up instead */
2861 *last_written = be32_to_cpu(ti.track_start) +
2862 be32_to_cpu(ti.track_size);
2864 *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
2868 /* this is where we end up if the drive either can't do a
2869 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
2870 it doesn't give enough information or fails. then we return
2871 the toc contents. */
2873 if (!CDROM_CAN(CDC_PLAY_AUDIO))
2876 toc.cdte_format = CDROM_MSF;
2877 toc.cdte_track = CDROM_LEADOUT;
2878 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
2880 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
2881 *last_written = toc.cdte_addr.lba;
2885 /* return the next writable block. also for udf file system. */
2886 static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
2887 long *next_writable)
2889 disc_information di;
2890 track_information ti;
2894 if (!CDROM_CAN(CDC_GENERIC_PACKET))
2895 goto use_last_written;
2897 ret = cdrom_get_disc_info(cdi, &di);
2898 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
2899 + sizeof(di.last_track_lsb))
2900 goto use_last_written;
2902 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
2903 last_track = (di.last_track_msb << 8) | di.last_track_lsb;
2904 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2905 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
2906 goto use_last_written;
2908 /* if this track is blank, try the previous. */
2910 if (last_track == 1)
2911 goto use_last_written;
2913 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
2915 goto use_last_written;
2918 /* if next recordable address field is valid, use it. */
2919 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
2920 + sizeof(ti.next_writable)) {
2921 *next_writable = be32_to_cpu(ti.next_writable);
2926 ret = cdrom_get_last_written(cdi, next_writable);
2931 *next_writable += 7;
2936 static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
2938 struct packet_command *cgc,
2941 struct request_sense sense;
2942 struct cdrom_msf msf;
2943 int blocksize = 0, format = 0, lba;
2948 blocksize = CD_FRAMESIZE_RAW;
2950 case CDROMREADMODE1:
2951 blocksize = CD_FRAMESIZE;
2954 case CDROMREADMODE2:
2955 blocksize = CD_FRAMESIZE_RAW0;
2958 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
2960 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
2961 /* FIXME: we need upper bound checking, too!! */
2965 cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
2966 if (cgc->buffer == NULL)
2969 memset(&sense, 0, sizeof(sense));
2970 cgc->sense = &sense;
2971 cgc->data_direction = CGC_DATA_READ;
2972 ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
2973 if (ret && sense.sense_key == 0x05 &&
2974 sense.asc == 0x20 &&
2975 sense.ascq == 0x00) {
2977 * SCSI-II devices are not required to support
2978 * READ_CD, so let's try switching block size
2980 /* FIXME: switch back again... */
2981 ret = cdrom_switch_blocksize(cdi, blocksize);
2985 ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
2986 ret |= cdrom_switch_blocksize(cdi, blocksize);
2988 if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
2995 static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
2998 struct cdrom_read_audio ra;
3001 if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
3005 if (ra.addr_format == CDROM_MSF)
3006 lba = msf_to_lba(ra.addr.msf.minute,
3009 else if (ra.addr_format == CDROM_LBA)
3014 /* FIXME: we need upper bound checking, too!! */
3015 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
3018 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
3021 static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
3025 struct cdrom_subchnl q;
3026 u_char requested, back;
3027 if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
3029 requested = q.cdsc_format;
3030 if (!((requested == CDROM_MSF) ||
3031 (requested == CDROM_LBA)))
3033 q.cdsc_format = CDROM_MSF;
3034 ret = cdrom_read_subchannel(cdi, &q, 0);
3037 back = q.cdsc_format; /* local copy */
3038 sanitize_format(&q.cdsc_absaddr, &back, requested);
3039 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
3040 if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
3042 /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
3046 static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
3048 struct packet_command *cgc)
3050 struct cdrom_device_ops *cdo = cdi->ops;
3051 struct cdrom_msf msf;
3052 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
3053 if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
3055 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
3056 cgc->cmd[3] = msf.cdmsf_min0;
3057 cgc->cmd[4] = msf.cdmsf_sec0;
3058 cgc->cmd[5] = msf.cdmsf_frame0;
3059 cgc->cmd[6] = msf.cdmsf_min1;
3060 cgc->cmd[7] = msf.cdmsf_sec1;
3061 cgc->cmd[8] = msf.cdmsf_frame1;
3062 cgc->data_direction = CGC_DATA_NONE;
3063 return cdo->generic_packet(cdi, cgc);
3066 static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
3068 struct packet_command *cgc)
3070 struct cdrom_device_ops *cdo = cdi->ops;
3071 struct cdrom_blk blk;
3072 cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
3073 if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
3075 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
3076 cgc->cmd[2] = (blk.from >> 24) & 0xff;
3077 cgc->cmd[3] = (blk.from >> 16) & 0xff;
3078 cgc->cmd[4] = (blk.from >> 8) & 0xff;
3079 cgc->cmd[5] = blk.from & 0xff;
3080 cgc->cmd[7] = (blk.len >> 8) & 0xff;
3081 cgc->cmd[8] = blk.len & 0xff;
3082 cgc->data_direction = CGC_DATA_NONE;
3083 return cdo->generic_packet(cdi, cgc);
3086 static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
3088 struct packet_command *cgc,
3091 struct cdrom_volctrl volctrl;
3092 unsigned char buffer[32];
3093 char mask[sizeof(buffer)];
3094 unsigned short offset;
3097 cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
3099 if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
3103 cgc->buffer = buffer;
3105 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
3109 /* originally the code depended on buffer[1] to determine
3110 how much data is available for transfer. buffer[1] is
3111 unfortunately ambigious and the only reliable way seem
3112 to be to simply skip over the block descriptor... */
3113 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
3115 if (offset + 16 > sizeof(buffer))
3118 if (offset + 16 > cgc->buflen) {
3119 cgc->buflen = offset + 16;
3120 ret = cdrom_mode_sense(cdi, cgc,
3121 GPMODE_AUDIO_CTL_PAGE, 0);
3127 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
3128 buffer[offset + 1] < 14)
3131 /* now we have the current volume settings. if it was only
3132 a CDROMVOLREAD, return these values */
3133 if (cmd == CDROMVOLREAD) {
3134 volctrl.channel0 = buffer[offset+9];
3135 volctrl.channel1 = buffer[offset+11];
3136 volctrl.channel2 = buffer[offset+13];
3137 volctrl.channel3 = buffer[offset+15];
3138 if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
3144 /* get the volume mask */
3146 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
3150 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
3151 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
3152 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
3153 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
3156 cgc->buffer = buffer + offset - 8;
3157 memset(cgc->buffer, 0, 8);
3158 return cdrom_mode_select(cdi, cgc);
3161 static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
3162 struct packet_command *cgc,
3165 struct cdrom_device_ops *cdo = cdi->ops;
3166 cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
3167 cgc->cmd[0] = GPCMD_START_STOP_UNIT;
3169 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
3170 cgc->data_direction = CGC_DATA_NONE;
3171 return cdo->generic_packet(cdi, cgc);
3174 static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
3175 struct packet_command *cgc,
3178 struct cdrom_device_ops *cdo = cdi->ops;
3179 cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
3180 cgc->cmd[0] = GPCMD_PAUSE_RESUME;
3181 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
3182 cgc->data_direction = CGC_DATA_NONE;
3183 return cdo->generic_packet(cdi, cgc);
3186 static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
3188 struct packet_command *cgc)
3192 int size = sizeof(dvd_struct);
3194 if (!CDROM_CAN(CDC_DVD))
3197 s = kmalloc(size, GFP_KERNEL);
3201 cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
3202 if (copy_from_user(s, arg, size)) {
3207 ret = dvd_read_struct(cdi, s, cgc);
3211 if (copy_to_user(arg, s, size))
3218 static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
3223 if (!CDROM_CAN(CDC_DVD))
3225 cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
3226 if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
3228 ret = dvd_do_auth(cdi, &ai);
3231 if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
3236 static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
3241 cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
3242 ret = cdrom_get_next_writable(cdi, &next);
3245 if (copy_to_user((long __user *)arg, &next, sizeof(next)))
3250 static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
3255 cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
3256 ret = cdrom_get_last_written(cdi, &last);
3259 if (copy_to_user((long __user *)arg, &last, sizeof(last)))
3264 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
3267 struct packet_command cgc;
3268 void __user *userptr = (void __user *)arg;
3270 memset(&cgc, 0, sizeof(cgc));
3272 /* build a unified command and queue it through
3273 cdo->generic_packet() */
3276 case CDROMREADMODE1:
3277 case CDROMREADMODE2:
3278 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
3279 case CDROMREADAUDIO:
3280 return mmc_ioctl_cdrom_read_audio(cdi, userptr);
3282 return mmc_ioctl_cdrom_subchannel(cdi, userptr);
3284 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
3286 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
3289 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
3292 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
3295 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
3296 case DVD_READ_STRUCT:
3297 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
3299 return mmc_ioctl_dvd_auth(cdi, userptr);
3300 case CDROM_NEXT_WRITABLE:
3301 return mmc_ioctl_cdrom_next_writable(cdi, userptr);
3302 case CDROM_LAST_WRITTEN:
3303 return mmc_ioctl_cdrom_last_written(cdi, userptr);
3310 * Just about every imaginable ioctl is supported in the Uniform layer
3312 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
3314 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
3315 fmode_t mode, unsigned int cmd, unsigned long arg)
3317 void __user *argp = (void __user *)arg;
3321 * Try the generic SCSI command ioctl's first.
3323 ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
3328 case CDROMMULTISESSION:
3329 return cdrom_ioctl_multisession(cdi, argp);
3331 return cdrom_ioctl_eject(cdi);
3332 case CDROMCLOSETRAY:
3333 return cdrom_ioctl_closetray(cdi);
3335 return cdrom_ioctl_eject_sw(cdi, arg);
3336 case CDROM_MEDIA_CHANGED:
3337 return cdrom_ioctl_media_changed(cdi, arg);
3338 case CDROM_SET_OPTIONS:
3339 return cdrom_ioctl_set_options(cdi, arg);
3340 case CDROM_CLEAR_OPTIONS:
3341 return cdrom_ioctl_clear_options(cdi, arg);
3342 case CDROM_SELECT_SPEED:
3343 return cdrom_ioctl_select_speed(cdi, arg);
3344 case CDROM_SELECT_DISC:
3345 return cdrom_ioctl_select_disc(cdi, arg);
3347 return cdrom_ioctl_reset(cdi, bdev);
3348 case CDROM_LOCKDOOR:
3349 return cdrom_ioctl_lock_door(cdi, arg);
3351 return cdrom_ioctl_debug(cdi, arg);
3352 case CDROM_GET_CAPABILITY:
3353 return cdrom_ioctl_get_capability(cdi);
3355 return cdrom_ioctl_get_mcn(cdi, argp);
3356 case CDROM_DRIVE_STATUS:
3357 return cdrom_ioctl_drive_status(cdi, arg);
3358 case CDROM_DISC_STATUS:
3359 return cdrom_ioctl_disc_status(cdi);
3360 case CDROM_CHANGER_NSLOTS:
3361 return cdrom_ioctl_changer_nslots(cdi);
3365 * Use the ioctls that are implemented through the generic_packet()
3366 * interface. this may look at bit funny, but if -ENOTTY is
3367 * returned that particular ioctl is not implemented and we
3368 * let it go through the device specific ones.
3370 if (CDROM_CAN(CDC_GENERIC_PACKET)) {
3371 ret = mmc_ioctl(cdi, cmd, arg);
3377 * Note: most of the cd_dbg() calls are commented out here,
3378 * because they fill up the sys log when CD players poll
3383 return cdrom_ioctl_get_subchnl(cdi, argp);
3384 case CDROMREADTOCHDR:
3385 return cdrom_ioctl_read_tochdr(cdi, argp);
3386 case CDROMREADTOCENTRY:
3387 return cdrom_ioctl_read_tocentry(cdi, argp);
3389 return cdrom_ioctl_play_msf(cdi, argp);
3390 case CDROMPLAYTRKIND:
3391 return cdrom_ioctl_play_trkind(cdi, argp);
3393 return cdrom_ioctl_volctrl(cdi, argp);
3395 return cdrom_ioctl_volread(cdi, argp);
3400 return cdrom_ioctl_audioctl(cdi, cmd);
3406 EXPORT_SYMBOL(cdrom_get_last_written);
3407 EXPORT_SYMBOL(register_cdrom);
3408 EXPORT_SYMBOL(unregister_cdrom);
3409 EXPORT_SYMBOL(cdrom_open);
3410 EXPORT_SYMBOL(cdrom_release);
3411 EXPORT_SYMBOL(cdrom_ioctl);
3412 EXPORT_SYMBOL(cdrom_media_changed);
3413 EXPORT_SYMBOL(cdrom_number_of_slots);
3414 EXPORT_SYMBOL(cdrom_mode_select);
3415 EXPORT_SYMBOL(cdrom_mode_sense);
3416 EXPORT_SYMBOL(init_cdrom_command);
3417 EXPORT_SYMBOL(cdrom_get_media_event);
3419 #ifdef CONFIG_SYSCTL
3421 #define CDROM_STR_SIZE 1000
3423 static struct cdrom_sysctl_settings {
3424 char info[CDROM_STR_SIZE]; /* general info */
3425 int autoclose; /* close tray upon mount, etc */
3426 int autoeject; /* eject on umount */
3427 int debug; /* turn on debugging messages */
3428 int lock; /* lock the door on device open */
3429 int check; /* check media type */
3430 } cdrom_sysctl_settings;
3432 enum cdrom_print_option {
3439 static int cdrom_print_info(const char *header, int val, char *info,
3440 int *pos, enum cdrom_print_option option)
3442 const int max_size = sizeof(cdrom_sysctl_settings.info);
3443 struct cdrom_device_info *cdi;
3446 ret = scnprintf(info + *pos, max_size - *pos, header);
3452 list_for_each_entry(cdi, &cdrom_list, list) {
3455 ret = scnprintf(info + *pos, max_size - *pos,
3459 ret = scnprintf(info + *pos, max_size - *pos,
3460 "\t%d", cdi->speed);
3463 ret = scnprintf(info + *pos, max_size - *pos,
3464 "\t%d", cdi->capacity);
3466 case CTL_CAPABILITY:
3467 ret = scnprintf(info + *pos, max_size - *pos,
3468 "\t%d", CDROM_CAN(val) != 0);
3471 pr_info("invalid option%d\n", option);
3482 static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
3483 void __user *buffer, size_t *lenp, loff_t *ppos)
3486 char *info = cdrom_sysctl_settings.info;
3487 const int max_size = sizeof(cdrom_sysctl_settings.info);
3489 if (!*lenp || (*ppos && !write)) {
3494 mutex_lock(&cdrom_mutex);
3496 pos = sprintf(info, "CD-ROM information, " VERSION "\n");
3498 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
3500 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
3502 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
3504 if (cdrom_print_info("\nCan close tray:\t",
3505 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
3507 if (cdrom_print_info("\nCan open tray:\t",
3508 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
3510 if (cdrom_print_info("\nCan lock tray:\t",
3511 CDC_LOCK, info, &pos, CTL_CAPABILITY))
3513 if (cdrom_print_info("\nCan change speed:",
3514 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
3516 if (cdrom_print_info("\nCan select disk:",
3517 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
3519 if (cdrom_print_info("\nCan read multisession:",
3520 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
3522 if (cdrom_print_info("\nCan read MCN:\t",
3523 CDC_MCN, info, &pos, CTL_CAPABILITY))
3525 if (cdrom_print_info("\nReports media changed:",
3526 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
3528 if (cdrom_print_info("\nCan play audio:\t",
3529 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
3531 if (cdrom_print_info("\nCan write CD-R:\t",
3532 CDC_CD_R, info, &pos, CTL_CAPABILITY))
3534 if (cdrom_print_info("\nCan write CD-RW:",
3535 CDC_CD_RW, info, &pos, CTL_CAPABILITY))
3537 if (cdrom_print_info("\nCan read DVD:\t",
3538 CDC_DVD, info, &pos, CTL_CAPABILITY))
3540 if (cdrom_print_info("\nCan write DVD-R:",
3541 CDC_DVD_R, info, &pos, CTL_CAPABILITY))
3543 if (cdrom_print_info("\nCan write DVD-RAM:",
3544 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
3546 if (cdrom_print_info("\nCan read MRW:\t",
3547 CDC_MRW, info, &pos, CTL_CAPABILITY))
3549 if (cdrom_print_info("\nCan write MRW:\t",
3550 CDC_MRW_W, info, &pos, CTL_CAPABILITY))
3552 if (cdrom_print_info("\nCan write RAM:\t",
3553 CDC_RAM, info, &pos, CTL_CAPABILITY))
3555 if (!scnprintf(info + pos, max_size - pos, "\n\n"))
3558 mutex_unlock(&cdrom_mutex);
3559 return proc_dostring(ctl, write, buffer, lenp, ppos);
3561 pr_info("info buffer too small\n");
3565 /* Unfortunately, per device settings are not implemented through
3566 procfs/sysctl yet. When they are, this will naturally disappear. For now
3567 just update all drives. Later this will become the template on which
3568 new registered drives will be based. */
3569 static void cdrom_update_settings(void)
3571 struct cdrom_device_info *cdi;
3573 mutex_lock(&cdrom_mutex);
3574 list_for_each_entry(cdi, &cdrom_list, list) {
3575 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
3576 cdi->options |= CDO_AUTO_CLOSE;
3577 else if (!autoclose)
3578 cdi->options &= ~CDO_AUTO_CLOSE;
3579 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
3580 cdi->options |= CDO_AUTO_EJECT;
3581 else if (!autoeject)
3582 cdi->options &= ~CDO_AUTO_EJECT;
3583 if (lockdoor && CDROM_CAN(CDC_LOCK))
3584 cdi->options |= CDO_LOCK;
3586 cdi->options &= ~CDO_LOCK;
3587 if (check_media_type)
3588 cdi->options |= CDO_CHECK_TYPE;
3590 cdi->options &= ~CDO_CHECK_TYPE;
3592 mutex_unlock(&cdrom_mutex);
3595 static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
3596 void __user *buffer, size_t *lenp, loff_t *ppos)
3600 ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
3604 /* we only care for 1 or 0. */
3605 autoclose = !!cdrom_sysctl_settings.autoclose;
3606 autoeject = !!cdrom_sysctl_settings.autoeject;
3607 debug = !!cdrom_sysctl_settings.debug;
3608 lockdoor = !!cdrom_sysctl_settings.lock;
3609 check_media_type = !!cdrom_sysctl_settings.check;
3611 /* update the option flags according to the changes. we
3612 don't have per device options through sysctl yet,
3613 but we will have and then this will disappear. */
3614 cdrom_update_settings();
3620 /* Place files in /proc/sys/dev/cdrom */
3621 static struct ctl_table cdrom_table[] = {
3624 .data = &cdrom_sysctl_settings.info,
3625 .maxlen = CDROM_STR_SIZE,
3627 .proc_handler = cdrom_sysctl_info,
3630 .procname = "autoclose",
3631 .data = &cdrom_sysctl_settings.autoclose,
3632 .maxlen = sizeof(int),
3634 .proc_handler = cdrom_sysctl_handler,
3637 .procname = "autoeject",
3638 .data = &cdrom_sysctl_settings.autoeject,
3639 .maxlen = sizeof(int),
3641 .proc_handler = cdrom_sysctl_handler,
3644 .procname = "debug",
3645 .data = &cdrom_sysctl_settings.debug,
3646 .maxlen = sizeof(int),
3648 .proc_handler = cdrom_sysctl_handler,
3652 .data = &cdrom_sysctl_settings.lock,
3653 .maxlen = sizeof(int),
3655 .proc_handler = cdrom_sysctl_handler,
3658 .procname = "check_media",
3659 .data = &cdrom_sysctl_settings.check,
3660 .maxlen = sizeof(int),
3662 .proc_handler = cdrom_sysctl_handler
3667 static struct ctl_table cdrom_cdrom_table[] = {
3669 .procname = "cdrom",
3672 .child = cdrom_table,
3677 /* Make sure that /proc/sys/dev is there */
3678 static struct ctl_table cdrom_root_table[] = {
3683 .child = cdrom_cdrom_table,
3687 static struct ctl_table_header *cdrom_sysctl_header;
3689 static void cdrom_sysctl_register(void)
3691 static atomic_t initialized = ATOMIC_INIT(0);
3693 if (!atomic_add_unless(&initialized, 1, 1))
3696 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
3698 /* set the defaults */
3699 cdrom_sysctl_settings.autoclose = autoclose;
3700 cdrom_sysctl_settings.autoeject = autoeject;
3701 cdrom_sysctl_settings.debug = debug;
3702 cdrom_sysctl_settings.lock = lockdoor;
3703 cdrom_sysctl_settings.check = check_media_type;
3706 static void cdrom_sysctl_unregister(void)
3708 if (cdrom_sysctl_header)
3709 unregister_sysctl_table(cdrom_sysctl_header);
3712 #else /* CONFIG_SYSCTL */
3714 static void cdrom_sysctl_register(void)
3718 static void cdrom_sysctl_unregister(void)
3722 #endif /* CONFIG_SYSCTL */
3724 static int __init cdrom_init(void)
3726 cdrom_sysctl_register();
3731 static void __exit cdrom_exit(void)
3733 pr_info("Uniform CD-ROM driver unloaded\n");
3734 cdrom_sysctl_unregister();
3737 module_init(cdrom_init);
3738 module_exit(cdrom_exit);
3739 MODULE_LICENSE("GPL");