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> 5 6 May be copied or modified under the terms of the GNU General Public 7 License. See linux/COPYING for more information. 8 9 Uniform CD-ROM driver for Linux. 10 See Documentation/cdrom/cdrom-standard.tex for usage information. 11 12 The routines in the file provide a uniform interface between the 13 software that uses CD-ROMs and the various low-level drivers that 14 actually talk to the hardware. Suggestions are welcome. 15 Patches that work are more welcome though. ;-) 16 17 To Do List: 18 ---------------------------------- 19 20 -- Modify sysctl/proc interface. I plan on having one directory per 21 drive, with entries for outputing general drive information, and sysctl 22 based tunable parameters such as whether the tray should auto-close for 23 that drive. Suggestions (or patches) for this welcome! 24 25 26 Revision History 27 ---------------------------------- 28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl> 29 -- Initial version by David A. van Leeuwen. I don't have a detailed 30 changelog for the 1.x series, David? 31 32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org> 33 -- New maintainer! As David A. van Leeuwen has been too busy to activly 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. 36 37 -- Added (rudimentary) sysctl interface. I realize this is really weak 38 right now, and is _very_ badly implemented. It will be improved... 39 40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into 41 the Uniform CD-ROM driver via the cdrom_count_tracks function. 42 The cdrom_count_tracks function helps resolve some of the false 43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check 44 for the correct media type when mounting or playing audio from a CD. 45 46 -- Remove the calls to verify_area and only use the copy_from_user and 47 copy_to_user stuff, since these calls now provide their own memory 48 checking with the 2.1.x kernels. 49 50 -- Major update to return codes so that errors from low-level drivers 51 are passed on through (thanks to Gerd Knorr for pointing out this 52 problem). 53 54 -- Made it so if a function isn't implemented in a low-level driver, 55 ENOSYS is now returned instead of EINVAL. 56 57 -- Simplified some complex logic so that the source code is easier to read. 58 59 -- Other stuff I probably forgot to mention (lots of changes). 60 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 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. 69 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. 78 79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org> 80 -- Fixed a bug in cdrom_media_changed and handling of reporting that 81 the media had changed for devices that _don't_ implement media_changed. 82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug. 83 -- Made a few things more pedanticly correct. 84 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 89 90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk> 91 -- Check if drive is capable of doing what we ask before blindly changing 92 cdi->options in various ioctl. 93 -- Added version to proc entry. 94 95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk> 96 -- Fixed an error in open_for_data where we would sometimes not return 97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>. 98 -- Fixed module usage count - usage was based on /proc/sys/dev 99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other 100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where 101 dev would be removed even though it was used. cdrom.c just illuminated 102 that bug. 103 104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk> 105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has 106 been "rewritten" because capabilities and options aren't in sync. They 107 should be... 108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way. 109 -- Added CDROM_RESET ioctl. 110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly. 111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs 112 from parsing /proc/sys/dev/cdrom/info. 113 114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk> 115 -- Check capability mask from low level driver when counting tracks as 116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>. 117 118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk> 119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of 120 CDC_CLOSE_TRAY. 121 -- proc info didn't mask against capabilities mask. 122 123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk> 124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the 125 code was duplicated before. Drives that support the generic packet 126 interface are now being fed packets from here instead. 127 -- First attempt at adding support for MMC2 commands - for DVD and 128 CD-R(W) drives. Only the DVD parts are in now - the interface used is 129 the same as for the audio ioctls. 130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get 131 a change to perform device specific ioctls as well. 132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities. 133 -- Put in sysctl files for autoclose, autoeject, check_media, debug, 134 and lock. 135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about 136 CD-Rx and DVD capabilities. 137 -- Now default to checking media type. 138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for 139 doing this anyway, with the generic_packet addition. 140 141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk> 142 -- Fix up the sysctl handling so that the option flags get set 143 correctly. 144 -- Fix up ioctl handling so the device specific ones actually get 145 called :). 146 147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk> 148 -- Fixed volume control on SCSI drives (or others with longer audio 149 page). 150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath 151 <andrewtv@usa.net> for telling me and for having defined the various 152 DVD structures and ioctls in the first place! He designed the original 153 DVD patches for ide-cd and while I rearranged and unified them, the 154 interface is still the same. 155 156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk> 157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only 158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left. 159 -- Moved the CDROMREADxxx ioctls in here. 160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls 161 and exported functions. 162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands 163 to now read GPCMD_ for the new generic packet interface. All low level 164 drivers are updated as well. 165 -- Various other cleanups. 166 167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk> 168 -- Fixed a couple of possible memory leaks (if an operation failed and 169 we didn't free the buffer before returning the error). 170 -- Integrated Uniform CD Changer handling from Richard Sharman 171 <rsharman@pobox.com>. 172 -- Defined CD_DVD and CD_CHANGER log levels. 173 -- Fixed the CDROMREADxxx ioctls. 174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few 175 drives supported it. We lose the index part, however. 176 -- Small modifications to accommodate opens of /dev/hdc1, required 177 for ide-cd to handle multisession discs. 178 -- Export cdrom_mode_sense and cdrom_mode_select. 179 -- init_cdrom_command() for setting up a cgc command. 180 181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk> 182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually 183 impossible to send the drive data in a sensible way. 184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and 185 dvd_read_manufact. 186 -- Added setup of write mode for packet writing. 187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of 188 number of frames and split the reads in blocks of 8. 189 190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk> 191 -- Added support for changing the region of DVD drives. 192 -- Added sense data to generic command. 193 194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de> 195 -- Do same "read header length" trick in cdrom_get_disc_info() as 196 we do in cdrom_get_track_info() -- some drive don't obey specs and 197 fail if they can't supply the full Mt Fuji size table. 198 -- Deleted stuff related to setting up write modes. It has a different 199 home now. 200 -- Clear header length in mode_select unconditionally. 201 -- Removed the register_disk() that was added, not needed here. 202 203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de> 204 -- Fix direction flag in setup_send_key and setup_report_key. This 205 gave some SCSI adapters problems. 206 -- Always return -EROFS for write opens 207 -- Convert to module_init/module_exit style init and remove some 208 of the #ifdef MODULE stuff 209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid, 210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and 211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command 212 did not clear a 0 sized buffer. 213 214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de> 215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In 216 that case switch block size and issue plain READ_10 again, then switch 217 back. 218 219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de> 220 -- Fix volume control on CD's - old SCSI-II drives now use their own 221 code, as doing MODE6 stuff in here is really not my intention. 222 -- Use READ_DISC_INFO for more reliable end-of-disc. 223 224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de> 225 -- Fix bug in getting rpc phase 2 region info. 226 -- Reinstate "correct" CDROMPLAYTRKIND 227 228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de> 229 -- Use quiet bit on packet commands not known to work 230 231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de> 232 -- Various fixes and lots of cleanups not listed :-) 233 -- Locking fixes 234 -- Mt Rainier support 235 -- DVD-RAM write open fixes 236 237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov 238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units. 239 240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW 241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se> 242 243 -------------------------------------------------------------------------*/ 244 245 #define REVISION "Revision: 3.20" 246 #define VERSION "Id: cdrom.c 3.20 2003/12/17" 247 248 /* I use an error-log mask to give fine grain control over the type of 249 messages dumped to the system logs. The available masks include: */ 250 #define CD_NOTHING 0x0 251 #define CD_WARNING 0x1 252 #define CD_REG_UNREG 0x2 253 #define CD_DO_IOCTL 0x4 254 #define CD_OPEN 0x8 255 #define CD_CLOSE 0x10 256 #define CD_COUNT_TRACKS 0x20 257 #define CD_CHANGER 0x40 258 #define CD_DVD 0x80 259 260 /* Define this to remove _all_ the debugging messages */ 261 /* #define ERRLOGMASK CD_NOTHING */ 262 #define ERRLOGMASK CD_WARNING 263 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 264 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 265 266 #include <linux/module.h> 267 #include <linux/fs.h> 268 #include <linux/buffer_head.h> 269 #include <linux/major.h> 270 #include <linux/types.h> 271 #include <linux/errno.h> 272 #include <linux/kernel.h> 273 #include <linux/mm.h> 274 #include <linux/slab.h> 275 #include <linux/cdrom.h> 276 #include <linux/sysctl.h> 277 #include <linux/proc_fs.h> 278 #include <linux/blkpg.h> 279 #include <linux/init.h> 280 #include <linux/fcntl.h> 281 #include <linux/blkdev.h> 282 #include <linux/times.h> 283 284 #include <asm/uaccess.h> 285 286 /* used to tell the module to turn on full debugging messages */ 287 static int debug; 288 /* used to keep tray locked at all times */ 289 static int keeplocked; 290 /* default compatibility mode */ 291 static int autoclose=1; 292 static int autoeject; 293 static int lockdoor = 1; 294 /* will we ever get to use this... sigh. */ 295 static int check_media_type; 296 /* automatically restart mrw format */ 297 static int 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); 304 305 static DEFINE_SPINLOCK(cdrom_lock); 306 307 static const char *mrw_format_status[] = { 308 "not mrw", 309 "bgformat inactive", 310 "bgformat active", 311 "mrw complete", 312 }; 313 314 static const char *mrw_address_space[] = { "DMA", "GAA" }; 315 316 #if (ERRLOGMASK!=CD_NOTHING) 317 #define cdinfo(type, fmt, args...) \ 318 if ((ERRLOGMASK & type) || debug==1 ) \ 319 printk(KERN_INFO "cdrom: " fmt, ## args) 320 #else 321 #define cdinfo(type, fmt, args...) 322 #endif 323 324 /* These are used to simplify getting data in from and back to user land */ 325 #define IOCTL_IN(arg, type, in) \ 326 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \ 327 return -EFAULT; 328 329 #define IOCTL_OUT(arg, type, out) \ 330 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \ 331 return -EFAULT; 332 333 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 334 a lot of places. This macro makes the code more clear. */ 335 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 336 337 /* used in the audio ioctls */ 338 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret 339 340 /* Not-exported routines. */ 341 static int open_for_data(struct cdrom_device_info * cdi); 342 static int check_for_audio_disc(struct cdrom_device_info * cdi, 343 struct cdrom_device_ops * cdo); 344 static void sanitize_format(union cdrom_addr *addr, 345 u_char * curr, u_char requested); 346 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 347 unsigned long arg); 348 349 int cdrom_get_last_written(struct cdrom_device_info *, long *); 350 static int cdrom_get_next_writable(struct cdrom_device_info *, long *); 351 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*); 352 353 static int cdrom_mrw_exit(struct cdrom_device_info *cdi); 354 355 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); 356 357 #ifdef CONFIG_SYSCTL 358 static void cdrom_sysctl_register(void); 359 #endif /* CONFIG_SYSCTL */ 360 static struct cdrom_device_info *topCdromPtr; 361 362 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 363 struct packet_command *cgc) 364 { 365 if (cgc->sense) { 366 cgc->sense->sense_key = 0x05; 367 cgc->sense->asc = 0x20; 368 cgc->sense->ascq = 0x00; 369 } 370 371 cgc->stat = -EIO; 372 return -EIO; 373 } 374 375 /* This macro makes sure we don't have to check on cdrom_device_ops 376 * existence in the run-time routines below. Change_capability is a 377 * hack to have the capability flags defined const, while we can still 378 * change it here without gcc complaining at every line. 379 */ 380 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits) 381 382 int register_cdrom(struct cdrom_device_info *cdi) 383 { 384 static char banner_printed; 385 struct cdrom_device_ops *cdo = cdi->ops; 386 int *change_capability = (int *)&cdo->capability; /* hack */ 387 388 cdinfo(CD_OPEN, "entering register_cdrom\n"); 389 390 if (cdo->open == NULL || cdo->release == NULL) 391 return -2; 392 if (!banner_printed) { 393 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n"); 394 banner_printed = 1; 395 #ifdef CONFIG_SYSCTL 396 cdrom_sysctl_register(); 397 #endif /* CONFIG_SYSCTL */ 398 } 399 400 ENSURE(drive_status, CDC_DRIVE_STATUS ); 401 ENSURE(media_changed, CDC_MEDIA_CHANGED); 402 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 403 ENSURE(lock_door, CDC_LOCK); 404 ENSURE(select_speed, CDC_SELECT_SPEED); 405 ENSURE(get_last_session, CDC_MULTI_SESSION); 406 ENSURE(get_mcn, CDC_MCN); 407 ENSURE(reset, CDC_RESET); 408 ENSURE(audio_ioctl, CDC_PLAY_AUDIO); 409 ENSURE(generic_packet, CDC_GENERIC_PACKET); 410 cdi->mc_flags = 0; 411 cdo->n_minors = 0; 412 cdi->options = CDO_USE_FFLAGS; 413 414 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY)) 415 cdi->options |= (int) CDO_AUTO_CLOSE; 416 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY)) 417 cdi->options |= (int) CDO_AUTO_EJECT; 418 if (lockdoor==1) 419 cdi->options |= (int) CDO_LOCK; 420 if (check_media_type==1) 421 cdi->options |= (int) CDO_CHECK_TYPE; 422 423 if (CDROM_CAN(CDC_MRW_W)) 424 cdi->exit = cdrom_mrw_exit; 425 426 if (cdi->disk) 427 cdi->cdda_method = CDDA_BPC_FULL; 428 else 429 cdi->cdda_method = CDDA_OLD; 430 431 if (!cdo->generic_packet) 432 cdo->generic_packet = cdrom_dummy_generic_packet; 433 434 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 435 spin_lock(&cdrom_lock); 436 cdi->next = topCdromPtr; 437 topCdromPtr = cdi; 438 spin_unlock(&cdrom_lock); 439 return 0; 440 } 441 #undef ENSURE 442 443 int unregister_cdrom(struct cdrom_device_info *unreg) 444 { 445 struct cdrom_device_info *cdi, *prev; 446 cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 447 448 prev = NULL; 449 spin_lock(&cdrom_lock); 450 cdi = topCdromPtr; 451 while (cdi && cdi != unreg) { 452 prev = cdi; 453 cdi = cdi->next; 454 } 455 456 if (cdi == NULL) { 457 spin_unlock(&cdrom_lock); 458 return -2; 459 } 460 if (prev) 461 prev->next = cdi->next; 462 else 463 topCdromPtr = cdi->next; 464 465 spin_unlock(&cdrom_lock); 466 467 if (cdi->exit) 468 cdi->exit(cdi); 469 470 cdi->ops->n_minors--; 471 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 472 return 0; 473 } 474 475 int cdrom_get_media_event(struct cdrom_device_info *cdi, 476 struct media_event_desc *med) 477 { 478 struct packet_command cgc; 479 unsigned char buffer[8]; 480 struct event_header *eh = (struct event_header *) buffer; 481 482 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 483 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 484 cgc.cmd[1] = 1; /* IMMED */ 485 cgc.cmd[4] = 1 << 4; /* media event */ 486 cgc.cmd[8] = sizeof(buffer); 487 cgc.quiet = 1; 488 489 if (cdi->ops->generic_packet(cdi, &cgc)) 490 return 1; 491 492 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 493 return 1; 494 495 if (eh->nea || eh->notification_class != 0x4) 496 return 1; 497 498 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 499 return 0; 500 } 501 502 /* 503 * the first prototypes used 0x2c as the page code for the mrw mode page, 504 * subsequently this was changed to 0x03. probe the one used by this drive 505 */ 506 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 507 { 508 struct packet_command cgc; 509 char buffer[16]; 510 511 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 512 513 cgc.timeout = HZ; 514 cgc.quiet = 1; 515 516 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 517 cdi->mrw_mode_page = MRW_MODE_PC; 518 return 0; 519 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 520 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 521 return 0; 522 } 523 524 return 1; 525 } 526 527 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 528 { 529 struct packet_command cgc; 530 struct mrw_feature_desc *mfd; 531 unsigned char buffer[16]; 532 int ret; 533 534 *write = 0; 535 536 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 537 538 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 539 cgc.cmd[3] = CDF_MRW; 540 cgc.cmd[8] = sizeof(buffer); 541 cgc.quiet = 1; 542 543 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 544 return ret; 545 546 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 547 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 548 return 1; 549 *write = mfd->write; 550 551 if ((ret = cdrom_mrw_probe_pc(cdi))) { 552 *write = 0; 553 return ret; 554 } 555 556 return 0; 557 } 558 559 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 560 { 561 struct packet_command cgc; 562 unsigned char buffer[12]; 563 int ret; 564 565 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : ""); 566 567 /* 568 * FmtData bit set (bit 4), format type is 1 569 */ 570 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 571 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 572 cgc.cmd[1] = (1 << 4) | 1; 573 574 cgc.timeout = 5 * 60 * HZ; 575 576 /* 577 * 4 byte format list header, 8 byte format list descriptor 578 */ 579 buffer[1] = 1 << 1; 580 buffer[3] = 8; 581 582 /* 583 * nr_blocks field 584 */ 585 buffer[4] = 0xff; 586 buffer[5] = 0xff; 587 buffer[6] = 0xff; 588 buffer[7] = 0xff; 589 590 buffer[8] = 0x24 << 2; 591 buffer[11] = cont; 592 593 ret = cdi->ops->generic_packet(cdi, &cgc); 594 if (ret) 595 printk(KERN_INFO "cdrom: bgformat failed\n"); 596 597 return ret; 598 } 599 600 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 601 { 602 struct packet_command cgc; 603 604 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 605 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 606 607 /* 608 * Session = 1, Track = 0 609 */ 610 cgc.cmd[1] = !!immed; 611 cgc.cmd[2] = 1 << 1; 612 613 cgc.timeout = 5 * 60 * HZ; 614 615 return cdi->ops->generic_packet(cdi, &cgc); 616 } 617 618 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 619 { 620 struct packet_command cgc; 621 622 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 623 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 624 625 cgc.timeout = 5 * 60 * HZ; 626 627 return cdi->ops->generic_packet(cdi, &cgc); 628 } 629 630 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 631 { 632 disc_information di; 633 int ret; 634 635 ret = cdrom_get_disc_info(cdi, &di); 636 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 637 return 1; 638 639 ret = 0; 640 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 641 printk(KERN_INFO "cdrom: issuing MRW back ground " 642 "format suspend\n"); 643 ret = cdrom_mrw_bgformat_susp(cdi, 0); 644 } 645 646 if (!ret && cdi->media_written) 647 ret = cdrom_flush_cache(cdi); 648 649 return ret; 650 } 651 652 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 653 { 654 struct packet_command cgc; 655 struct mode_page_header *mph; 656 char buffer[16]; 657 int ret, offset, size; 658 659 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 660 661 cgc.buffer = buffer; 662 cgc.buflen = sizeof(buffer); 663 664 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0))) 665 return ret; 666 667 mph = (struct mode_page_header *) buffer; 668 offset = be16_to_cpu(mph->desc_length); 669 size = be16_to_cpu(mph->mode_data_length) + 2; 670 671 buffer[offset + 3] = space; 672 cgc.buflen = size; 673 674 if ((ret = cdrom_mode_select(cdi, &cgc))) 675 return ret; 676 677 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]); 678 return 0; 679 } 680 681 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 682 struct rwrt_feature_desc *rfd) 683 { 684 struct packet_command cgc; 685 char buffer[24]; 686 int ret; 687 688 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 689 690 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 691 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 692 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 693 cgc.quiet = 1; 694 695 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 696 return ret; 697 698 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 699 return 0; 700 } 701 702 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 703 { 704 struct packet_command cgc; 705 char buffer[16]; 706 __be16 *feature_code; 707 int ret; 708 709 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 710 711 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 712 cgc.cmd[3] = CDF_HWDM; 713 cgc.cmd[8] = sizeof(buffer); 714 cgc.quiet = 1; 715 716 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 717 return ret; 718 719 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 720 if (be16_to_cpu(*feature_code) == CDF_HWDM) 721 return 0; 722 723 return 1; 724 } 725 726 727 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 728 { 729 struct rwrt_feature_desc rfd; 730 int ret; 731 732 *write = 0; 733 734 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 735 return ret; 736 737 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 738 *write = 1; 739 740 return 0; 741 } 742 743 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 744 { 745 disc_information di; 746 int ret; 747 748 ret = cdrom_get_disc_info(cdi, &di); 749 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 750 return -1; 751 752 return di.erasable; 753 } 754 755 /* 756 * FIXME: check RO bit 757 */ 758 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 759 { 760 int ret = cdrom_media_erasable(cdi); 761 762 /* 763 * allow writable open if media info read worked and media is 764 * erasable, _or_ if it fails since not all drives support it 765 */ 766 if (!ret) 767 return 1; 768 769 return 0; 770 } 771 772 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 773 { 774 disc_information di; 775 int ret; 776 777 /* 778 * always reset to DMA lba space on open 779 */ 780 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 781 printk(KERN_ERR "cdrom: failed setting lba address space\n"); 782 return 1; 783 } 784 785 ret = cdrom_get_disc_info(cdi, &di); 786 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 787 return 1; 788 789 if (!di.erasable) 790 return 1; 791 792 /* 793 * mrw_status 794 * 0 - not MRW formatted 795 * 1 - MRW bgformat started, but not running or complete 796 * 2 - MRW bgformat in progress 797 * 3 - MRW formatting complete 798 */ 799 ret = 0; 800 printk(KERN_INFO "cdrom open: mrw_status '%s'\n", 801 mrw_format_status[di.mrw_status]); 802 if (!di.mrw_status) 803 ret = 1; 804 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 805 mrw_format_restart) 806 ret = cdrom_mrw_bgformat(cdi, 1); 807 808 return ret; 809 } 810 811 static int mo_open_write(struct cdrom_device_info *cdi) 812 { 813 struct packet_command cgc; 814 char buffer[255]; 815 int ret; 816 817 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 818 cgc.quiet = 1; 819 820 /* 821 * obtain write protect information as per 822 * drivers/scsi/sd.c:sd_read_write_protect_flag 823 */ 824 825 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 826 if (ret) 827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 828 if (ret) { 829 cgc.buflen = 255; 830 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 831 } 832 833 /* drive gave us no info, let the user go ahead */ 834 if (ret) 835 return 0; 836 837 return buffer[3] & 0x80; 838 } 839 840 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 841 { 842 struct rwrt_feature_desc rfd; 843 int ret; 844 845 if ((ret = cdrom_has_defect_mgt(cdi))) 846 return ret; 847 848 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 849 return ret; 850 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 851 ret = !rfd.curr; 852 853 cdinfo(CD_OPEN, "can open for random write\n"); 854 return ret; 855 } 856 857 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 858 { 859 struct packet_command cgc; 860 char buffer[32]; 861 int ret, mmc3_profile; 862 863 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 864 865 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 866 cgc.cmd[1] = 0; 867 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 868 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 869 cgc.quiet = 1; 870 871 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 872 mmc3_profile = 0xffff; 873 else 874 mmc3_profile = (buffer[6] << 8) | buffer[7]; 875 876 cdi->mmc3_profile = mmc3_profile; 877 } 878 879 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 880 { 881 switch (cdi->mmc3_profile) { 882 case 0x12: /* DVD-RAM */ 883 case 0x1A: /* DVD+RW */ 884 return 0; 885 default: 886 return 1; 887 } 888 } 889 890 /* 891 * returns 0 for ok to open write, non-0 to disallow 892 */ 893 static int cdrom_open_write(struct cdrom_device_info *cdi) 894 { 895 int mrw, mrw_write, ram_write; 896 int ret = 1; 897 898 mrw = 0; 899 if (!cdrom_is_mrw(cdi, &mrw_write)) 900 mrw = 1; 901 902 if (CDROM_CAN(CDC_MO_DRIVE)) 903 ram_write = 1; 904 else 905 (void) cdrom_is_random_writable(cdi, &ram_write); 906 907 if (mrw) 908 cdi->mask &= ~CDC_MRW; 909 else 910 cdi->mask |= CDC_MRW; 911 912 if (mrw_write) 913 cdi->mask &= ~CDC_MRW_W; 914 else 915 cdi->mask |= CDC_MRW_W; 916 917 if (ram_write) 918 cdi->mask &= ~CDC_RAM; 919 else 920 cdi->mask |= CDC_RAM; 921 922 if (CDROM_CAN(CDC_MRW_W)) 923 ret = cdrom_mrw_open_write(cdi); 924 else if (CDROM_CAN(CDC_DVD_RAM)) 925 ret = cdrom_dvdram_open_write(cdi); 926 else if (CDROM_CAN(CDC_RAM) && 927 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 928 ret = cdrom_ram_open_write(cdi); 929 else if (CDROM_CAN(CDC_MO_DRIVE)) 930 ret = mo_open_write(cdi); 931 else if (!cdrom_is_dvd_rw(cdi)) 932 ret = 0; 933 934 return ret; 935 } 936 937 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 938 { 939 struct packet_command cgc; 940 941 if (cdi->mmc3_profile != 0x1a) { 942 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 943 return; 944 } 945 946 if (!cdi->media_written) { 947 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 948 return; 949 } 950 951 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n", 952 cdi->name); 953 954 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 955 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 956 cgc.timeout = 30*HZ; 957 cdi->ops->generic_packet(cdi, &cgc); 958 959 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 960 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 961 cgc.timeout = 3000*HZ; 962 cgc.quiet = 1; 963 cdi->ops->generic_packet(cdi, &cgc); 964 965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 966 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 967 cgc.cmd[2] = 2; /* Close session */ 968 cgc.quiet = 1; 969 cgc.timeout = 3000*HZ; 970 cdi->ops->generic_packet(cdi, &cgc); 971 972 cdi->media_written = 0; 973 } 974 975 static int cdrom_close_write(struct cdrom_device_info *cdi) 976 { 977 #if 0 978 return cdrom_flush_cache(cdi); 979 #else 980 return 0; 981 #endif 982 } 983 984 /* We use the open-option O_NONBLOCK to indicate that the 985 * purpose of opening is only for subsequent ioctl() calls; no device 986 * integrity checks are performed. 987 * 988 * We hope that all cd-player programs will adopt this convention. It 989 * is in their own interest: device control becomes a lot easier 990 * this way. 991 */ 992 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 993 { 994 int ret; 995 996 cdinfo(CD_OPEN, "entering cdrom_open\n"); 997 998 /* if this was a O_NONBLOCK open and we should honor the flags, 999 * do a quick open without drive/disc integrity checks. */ 1000 cdi->use_count++; 1001 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) { 1002 ret = cdi->ops->open(cdi, 1); 1003 } else { 1004 ret = open_for_data(cdi); 1005 if (ret) 1006 goto err; 1007 cdrom_mmc3_profile(cdi); 1008 if (fp->f_mode & FMODE_WRITE) { 1009 ret = -EROFS; 1010 if (cdrom_open_write(cdi)) 1011 goto err_release; 1012 if (!CDROM_CAN(CDC_RAM)) 1013 goto err_release; 1014 ret = 0; 1015 cdi->media_written = 0; 1016 } 1017 } 1018 1019 if (ret) 1020 goto err; 1021 1022 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1023 cdi->name, cdi->use_count); 1024 /* Do this on open. Don't wait for mount, because they might 1025 not be mounting, but opening with O_NONBLOCK */ 1026 check_disk_change(ip->i_bdev); 1027 return 0; 1028 err_release: 1029 cdi->ops->release(cdi); 1030 err: 1031 cdi->use_count--; 1032 return ret; 1033 } 1034 1035 static 1036 int open_for_data(struct cdrom_device_info * cdi) 1037 { 1038 int ret; 1039 struct cdrom_device_ops *cdo = cdi->ops; 1040 tracktype tracks; 1041 cdinfo(CD_OPEN, "entering open_for_data\n"); 1042 /* Check if the driver can report drive status. If it can, we 1043 can do clever things. If it can't, well, we at least tried! */ 1044 if (cdo->drive_status != NULL) { 1045 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1046 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1047 if (ret == CDS_TRAY_OPEN) { 1048 cdinfo(CD_OPEN, "the tray is open...\n"); 1049 /* can/may i close it? */ 1050 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1051 cdi->options & CDO_AUTO_CLOSE) { 1052 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1053 ret=cdo->tray_move(cdi,0); 1054 if (ret) { 1055 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1056 /* Ignore the error from the low 1057 level driver. We don't care why it 1058 couldn't close the tray. We only care 1059 that there is no disc in the drive, 1060 since that is the _REAL_ problem here.*/ 1061 ret=-ENOMEDIUM; 1062 goto clean_up_and_return; 1063 } 1064 } else { 1065 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1066 ret=-ENOMEDIUM; 1067 goto clean_up_and_return; 1068 } 1069 /* Ok, the door should be closed now.. Check again */ 1070 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1072 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1073 cdinfo(CD_OPEN, "tray might not contain a medium.\n"); 1074 ret=-ENOMEDIUM; 1075 goto clean_up_and_return; 1076 } 1077 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1078 } 1079 /* the door should be closed now, check for the disc */ 1080 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1081 if (ret!=CDS_DISC_OK) { 1082 ret = -ENOMEDIUM; 1083 goto clean_up_and_return; 1084 } 1085 } 1086 cdrom_count_tracks(cdi, &tracks); 1087 if (tracks.error == CDS_NO_DISC) { 1088 cdinfo(CD_OPEN, "bummer. no disc.\n"); 1089 ret=-ENOMEDIUM; 1090 goto clean_up_and_return; 1091 } 1092 /* CD-Players which don't use O_NONBLOCK, workman 1093 * for example, need bit CDO_CHECK_TYPE cleared! */ 1094 if (tracks.data==0) { 1095 if (cdi->options & CDO_CHECK_TYPE) { 1096 /* give people a warning shot, now that CDO_CHECK_TYPE 1097 is the default case! */ 1098 cdinfo(CD_OPEN, "bummer. wrong media type.\n"); 1099 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1100 (unsigned int)current->pid); 1101 ret=-EMEDIUMTYPE; 1102 goto clean_up_and_return; 1103 } 1104 else { 1105 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n"); 1106 } 1107 } 1108 1109 cdinfo(CD_OPEN, "all seems well, opening the device.\n"); 1110 1111 /* all seems well, we can open the device */ 1112 ret = cdo->open(cdi, 0); /* open for data */ 1113 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret); 1114 /* After all this careful checking, we shouldn't have problems 1115 opening the device, but we don't want the device locked if 1116 this somehow fails... */ 1117 if (ret) { 1118 cdinfo(CD_OPEN, "open device failed.\n"); 1119 goto clean_up_and_return; 1120 } 1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1122 cdo->lock_door(cdi, 1); 1123 cdinfo(CD_OPEN, "door locked.\n"); 1124 } 1125 cdinfo(CD_OPEN, "device opened successfully.\n"); 1126 return ret; 1127 1128 /* Something failed. Try to unlock the drive, because some drivers 1129 (notably ide-cd) lock the drive after every command. This produced 1130 a nasty bug where after mount failed, the drive would remain locked! 1131 This ensures that the drive gets unlocked after a mount fails. This 1132 is a goto to avoid bloating the driver with redundant code. */ 1133 clean_up_and_return: 1134 cdinfo(CD_OPEN, "open failed.\n"); 1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1136 cdo->lock_door(cdi, 0); 1137 cdinfo(CD_OPEN, "door unlocked.\n"); 1138 } 1139 return ret; 1140 } 1141 1142 /* This code is similar to that in open_for_data. The routine is called 1143 whenever an audio play operation is requested. 1144 */ 1145 int check_for_audio_disc(struct cdrom_device_info * cdi, 1146 struct cdrom_device_ops * cdo) 1147 { 1148 int ret; 1149 tracktype tracks; 1150 cdinfo(CD_OPEN, "entering check_for_audio_disc\n"); 1151 if (!(cdi->options & CDO_CHECK_TYPE)) 1152 return 0; 1153 if (cdo->drive_status != NULL) { 1154 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1155 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1156 if (ret == CDS_TRAY_OPEN) { 1157 cdinfo(CD_OPEN, "the tray is open...\n"); 1158 /* can/may i close it? */ 1159 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1160 cdi->options & CDO_AUTO_CLOSE) { 1161 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1162 ret=cdo->tray_move(cdi,0); 1163 if (ret) { 1164 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1165 /* Ignore the error from the low 1166 level driver. We don't care why it 1167 couldn't close the tray. We only care 1168 that there is no disc in the drive, 1169 since that is the _REAL_ problem here.*/ 1170 return -ENOMEDIUM; 1171 } 1172 } else { 1173 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1174 return -ENOMEDIUM; 1175 } 1176 /* Ok, the door should be closed now.. Check again */ 1177 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1178 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1179 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1180 return -ENOMEDIUM; 1181 } 1182 if (ret!=CDS_DISC_OK) { 1183 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n"); 1184 return -EIO; 1185 } 1186 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1187 } 1188 } 1189 cdrom_count_tracks(cdi, &tracks); 1190 if (tracks.error) 1191 return(tracks.error); 1192 1193 if (tracks.audio==0) 1194 return -EMEDIUMTYPE; 1195 1196 return 0; 1197 } 1198 1199 /* Admittedly, the logic below could be performed in a nicer way. */ 1200 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp) 1201 { 1202 struct cdrom_device_ops *cdo = cdi->ops; 1203 int opened_for_data; 1204 1205 cdinfo(CD_CLOSE, "entering cdrom_release\n"); 1206 1207 if (cdi->use_count > 0) 1208 cdi->use_count--; 1209 if (cdi->use_count == 0) 1210 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name); 1211 if (cdi->use_count == 0) 1212 cdrom_dvd_rw_close_write(cdi); 1213 if (cdi->use_count == 0 && 1214 (cdo->capability & CDC_LOCK) && !keeplocked) { 1215 cdinfo(CD_CLOSE, "Unlocking door!\n"); 1216 cdo->lock_door(cdi, 0); 1217 } 1218 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1219 !(fp && fp->f_flags & O_NONBLOCK); 1220 1221 /* 1222 * flush cache on last write release 1223 */ 1224 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1225 cdrom_close_write(cdi); 1226 1227 cdo->release(cdi); 1228 if (cdi->use_count == 0) { /* last process that closes dev*/ 1229 if (opened_for_data && 1230 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1231 cdo->tray_move(cdi, 1); 1232 } 1233 return 0; 1234 } 1235 1236 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1237 struct cdrom_changer_info *buf) 1238 { 1239 struct packet_command cgc; 1240 struct cdrom_device_ops *cdo = cdi->ops; 1241 int length; 1242 1243 /* 1244 * Sanyo changer isn't spec compliant (doesn't use regular change 1245 * LOAD_UNLOAD command, and it doesn't implement the mech status 1246 * command below 1247 */ 1248 if (cdi->sanyo_slot) { 1249 buf->hdr.nslots = 3; 1250 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1251 for (length = 0; length < 3; length++) { 1252 buf->slots[length].disc_present = 1; 1253 buf->slots[length].change = 0; 1254 } 1255 return 0; 1256 } 1257 1258 length = sizeof(struct cdrom_mechstat_header) + 1259 cdi->capacity * sizeof(struct cdrom_slot); 1260 1261 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1262 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1263 cgc.cmd[8] = (length >> 8) & 0xff; 1264 cgc.cmd[9] = length & 0xff; 1265 return cdo->generic_packet(cdi, &cgc); 1266 } 1267 1268 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1269 { 1270 struct cdrom_changer_info *info; 1271 int ret; 1272 1273 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 1274 if (cdi->sanyo_slot) 1275 return CDS_NO_INFO; 1276 1277 info = kmalloc(sizeof(*info), GFP_KERNEL); 1278 if (!info) 1279 return -ENOMEM; 1280 1281 if ((ret = cdrom_read_mech_status(cdi, info))) 1282 goto out_free; 1283 1284 if (info->slots[slot].disc_present) 1285 ret = CDS_DISC_OK; 1286 else 1287 ret = CDS_NO_DISC; 1288 1289 out_free: 1290 kfree(info); 1291 return ret; 1292 } 1293 1294 /* Return the number of slots for an ATAPI/SCSI cdrom, 1295 * return 1 if not a changer. 1296 */ 1297 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1298 { 1299 int status; 1300 int nslots = 1; 1301 struct cdrom_changer_info *info; 1302 1303 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1304 /* cdrom_read_mech_status requires a valid value for capacity: */ 1305 cdi->capacity = 0; 1306 1307 info = kmalloc(sizeof(*info), GFP_KERNEL); 1308 if (!info) 1309 return -ENOMEM; 1310 1311 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1312 nslots = info->hdr.nslots; 1313 1314 kfree(info); 1315 return nslots; 1316 } 1317 1318 1319 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1320 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1321 { 1322 struct packet_command cgc; 1323 1324 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n"); 1325 if (cdi->sanyo_slot && slot < 0) 1326 return 0; 1327 1328 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1329 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1330 cgc.cmd[4] = 2 + (slot >= 0); 1331 cgc.cmd[8] = slot; 1332 cgc.timeout = 60 * HZ; 1333 1334 /* The Sanyo 3 CD changer uses byte 7 of the 1335 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1336 using the GPCMD_LOAD_UNLOAD opcode. */ 1337 if (cdi->sanyo_slot && -1 < slot) { 1338 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1339 cgc.cmd[7] = slot; 1340 cgc.cmd[4] = cgc.cmd[8] = 0; 1341 cdi->sanyo_slot = slot ? slot : 3; 1342 } 1343 1344 return cdi->ops->generic_packet(cdi, &cgc); 1345 } 1346 1347 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1348 { 1349 struct cdrom_changer_info *info; 1350 int curslot; 1351 int ret; 1352 1353 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n"); 1354 if (!CDROM_CAN(CDC_SELECT_DISC)) 1355 return -EDRIVE_CANT_DO_THIS; 1356 1357 (void) cdi->ops->media_changed(cdi, slot); 1358 1359 if (slot == CDSL_NONE) { 1360 /* set media changed bits, on both queues */ 1361 cdi->mc_flags = 0x3; 1362 return cdrom_load_unload(cdi, -1); 1363 } 1364 1365 info = kmalloc(sizeof(*info), GFP_KERNEL); 1366 if (!info) 1367 return -ENOMEM; 1368 1369 if ((ret = cdrom_read_mech_status(cdi, info))) { 1370 kfree(info); 1371 return ret; 1372 } 1373 1374 curslot = info->hdr.curslot; 1375 kfree(info); 1376 1377 if (cdi->use_count > 1 || keeplocked) { 1378 if (slot == CDSL_CURRENT) { 1379 return curslot; 1380 } else { 1381 return -EBUSY; 1382 } 1383 } 1384 1385 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1386 which is useful if it had been previously unloaded. 1387 Whether it can or not, it returns the current slot. 1388 Similarly, if slot happens to be the current one, we still 1389 try and load it. */ 1390 if (slot == CDSL_CURRENT) 1391 slot = curslot; 1392 1393 /* set media changed bits on both queues */ 1394 cdi->mc_flags = 0x3; 1395 if ((ret = cdrom_load_unload(cdi, slot))) 1396 return ret; 1397 1398 return slot; 1399 } 1400 1401 /* We want to make media_changed accessible to the user through an 1402 * ioctl. The main problem now is that we must double-buffer the 1403 * low-level implementation, to assure that the VFS and the user both 1404 * see a medium change once. 1405 */ 1406 1407 static 1408 int media_changed(struct cdrom_device_info *cdi, int queue) 1409 { 1410 unsigned int mask = (1 << (queue & 1)); 1411 int ret = !!(cdi->mc_flags & mask); 1412 1413 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1414 return ret; 1415 /* changed since last call? */ 1416 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) { 1417 cdi->mc_flags = 0x3; /* set bit on both queues */ 1418 ret |= 1; 1419 cdi->media_written = 0; 1420 } 1421 cdi->mc_flags &= ~mask; /* clear bit */ 1422 return ret; 1423 } 1424 1425 int cdrom_media_changed(struct cdrom_device_info *cdi) 1426 { 1427 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1428 * Returning "0" is always safe (media hasn't been changed). Do that 1429 * if the low-level cdrom driver dosn't support media changed. */ 1430 if (cdi == NULL || cdi->ops->media_changed == NULL) 1431 return 0; 1432 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1433 return 0; 1434 return media_changed(cdi, 0); 1435 } 1436 1437 /* badly broken, I know. Is due for a fixup anytime. */ 1438 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks) 1439 { 1440 struct cdrom_tochdr header; 1441 struct cdrom_tocentry entry; 1442 int ret, i; 1443 tracks->data=0; 1444 tracks->audio=0; 1445 tracks->cdi=0; 1446 tracks->xa=0; 1447 tracks->error=0; 1448 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1449 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1450 tracks->error=CDS_NO_INFO; 1451 return; 1452 } 1453 /* Grab the TOC header so we can see how many tracks there are */ 1454 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) { 1455 if (ret == -ENOMEDIUM) 1456 tracks->error = CDS_NO_DISC; 1457 else 1458 tracks->error = CDS_NO_INFO; 1459 return; 1460 } 1461 /* check what type of tracks are on this disc */ 1462 entry.cdte_format = CDROM_MSF; 1463 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1464 entry.cdte_track = i; 1465 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1466 tracks->error=CDS_NO_INFO; 1467 return; 1468 } 1469 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1470 if (entry.cdte_format == 0x10) 1471 tracks->cdi++; 1472 else if (entry.cdte_format == 0x20) 1473 tracks->xa++; 1474 else 1475 tracks->data++; 1476 } else 1477 tracks->audio++; 1478 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1479 i, entry.cdte_format, entry.cdte_ctrl); 1480 } 1481 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1482 header.cdth_trk1, tracks->audio, tracks->data, 1483 tracks->cdi, tracks->xa); 1484 } 1485 1486 /* Requests to the low-level drivers will /always/ be done in the 1487 following format convention: 1488 1489 CDROM_LBA: all data-related requests. 1490 CDROM_MSF: all audio-related requests. 1491 1492 However, a low-level implementation is allowed to refuse this 1493 request, and return information in its own favorite format. 1494 1495 It doesn't make sense /at all/ to ask for a play_audio in LBA 1496 format, or ask for multi-session info in MSF format. However, for 1497 backward compatibility these format requests will be satisfied, but 1498 the requests to the low-level drivers will be sanitized in the more 1499 meaningful format indicated above. 1500 */ 1501 1502 static 1503 void sanitize_format(union cdrom_addr *addr, 1504 u_char * curr, u_char requested) 1505 { 1506 if (*curr == requested) 1507 return; /* nothing to be done! */ 1508 if (requested == CDROM_LBA) { 1509 addr->lba = (int) addr->msf.frame + 1510 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1511 } else { /* CDROM_MSF */ 1512 int lba = addr->lba; 1513 addr->msf.frame = lba % 75; 1514 lba /= 75; 1515 lba += 2; 1516 addr->msf.second = lba % 60; 1517 addr->msf.minute = lba / 60; 1518 } 1519 *curr = requested; 1520 } 1521 1522 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1523 int type) 1524 { 1525 memset(cgc, 0, sizeof(struct packet_command)); 1526 if (buf) 1527 memset(buf, 0, len); 1528 cgc->buffer = (char *) buf; 1529 cgc->buflen = len; 1530 cgc->data_direction = type; 1531 cgc->timeout = 5*HZ; 1532 } 1533 1534 /* DVD handling */ 1535 1536 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1537 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1538 1539 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1540 { 1541 cgc->cmd[0] = GPCMD_REPORT_KEY; 1542 cgc->cmd[10] = type | (agid << 6); 1543 switch (type) { 1544 case 0: case 8: case 5: { 1545 cgc->buflen = 8; 1546 break; 1547 } 1548 case 1: { 1549 cgc->buflen = 16; 1550 break; 1551 } 1552 case 2: case 4: { 1553 cgc->buflen = 12; 1554 break; 1555 } 1556 } 1557 cgc->cmd[9] = cgc->buflen; 1558 cgc->data_direction = CGC_DATA_READ; 1559 } 1560 1561 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1562 { 1563 cgc->cmd[0] = GPCMD_SEND_KEY; 1564 cgc->cmd[10] = type | (agid << 6); 1565 switch (type) { 1566 case 1: { 1567 cgc->buflen = 16; 1568 break; 1569 } 1570 case 3: { 1571 cgc->buflen = 12; 1572 break; 1573 } 1574 case 6: { 1575 cgc->buflen = 8; 1576 break; 1577 } 1578 } 1579 cgc->cmd[9] = cgc->buflen; 1580 cgc->data_direction = CGC_DATA_WRITE; 1581 } 1582 1583 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1584 { 1585 int ret; 1586 u_char buf[20]; 1587 struct packet_command cgc; 1588 struct cdrom_device_ops *cdo = cdi->ops; 1589 rpc_state_t rpc_state; 1590 1591 memset(buf, 0, sizeof(buf)); 1592 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1593 1594 switch (ai->type) { 1595 /* LU data send */ 1596 case DVD_LU_SEND_AGID: 1597 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1598 cgc.quiet = 1; 1599 setup_report_key(&cgc, ai->lsa.agid, 0); 1600 1601 if ((ret = cdo->generic_packet(cdi, &cgc))) 1602 return ret; 1603 1604 ai->lsa.agid = buf[7] >> 6; 1605 /* Returning data, let host change state */ 1606 break; 1607 1608 case DVD_LU_SEND_KEY1: 1609 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1610 setup_report_key(&cgc, ai->lsk.agid, 2); 1611 1612 if ((ret = cdo->generic_packet(cdi, &cgc))) 1613 return ret; 1614 1615 copy_key(ai->lsk.key, &buf[4]); 1616 /* Returning data, let host change state */ 1617 break; 1618 1619 case DVD_LU_SEND_CHALLENGE: 1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1621 setup_report_key(&cgc, ai->lsc.agid, 1); 1622 1623 if ((ret = cdo->generic_packet(cdi, &cgc))) 1624 return ret; 1625 1626 copy_chal(ai->lsc.chal, &buf[4]); 1627 /* Returning data, let host change state */ 1628 break; 1629 1630 /* Post-auth key */ 1631 case DVD_LU_SEND_TITLE_KEY: 1632 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1633 cgc.quiet = 1; 1634 setup_report_key(&cgc, ai->lstk.agid, 4); 1635 cgc.cmd[5] = ai->lstk.lba; 1636 cgc.cmd[4] = ai->lstk.lba >> 8; 1637 cgc.cmd[3] = ai->lstk.lba >> 16; 1638 cgc.cmd[2] = ai->lstk.lba >> 24; 1639 1640 if ((ret = cdo->generic_packet(cdi, &cgc))) 1641 return ret; 1642 1643 ai->lstk.cpm = (buf[4] >> 7) & 1; 1644 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1645 ai->lstk.cgms = (buf[4] >> 4) & 3; 1646 copy_key(ai->lstk.title_key, &buf[5]); 1647 /* Returning data, let host change state */ 1648 break; 1649 1650 case DVD_LU_SEND_ASF: 1651 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1652 setup_report_key(&cgc, ai->lsasf.agid, 5); 1653 1654 if ((ret = cdo->generic_packet(cdi, &cgc))) 1655 return ret; 1656 1657 ai->lsasf.asf = buf[7] & 1; 1658 break; 1659 1660 /* LU data receive (LU changes state) */ 1661 case DVD_HOST_SEND_CHALLENGE: 1662 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1663 setup_send_key(&cgc, ai->hsc.agid, 1); 1664 buf[1] = 0xe; 1665 copy_chal(&buf[4], ai->hsc.chal); 1666 1667 if ((ret = cdo->generic_packet(cdi, &cgc))) 1668 return ret; 1669 1670 ai->type = DVD_LU_SEND_KEY1; 1671 break; 1672 1673 case DVD_HOST_SEND_KEY2: 1674 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1675 setup_send_key(&cgc, ai->hsk.agid, 3); 1676 buf[1] = 0xa; 1677 copy_key(&buf[4], ai->hsk.key); 1678 1679 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1680 ai->type = DVD_AUTH_FAILURE; 1681 return ret; 1682 } 1683 ai->type = DVD_AUTH_ESTABLISHED; 1684 break; 1685 1686 /* Misc */ 1687 case DVD_INVALIDATE_AGID: 1688 cgc.quiet = 1; 1689 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1690 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1691 if ((ret = cdo->generic_packet(cdi, &cgc))) 1692 return ret; 1693 break; 1694 1695 /* Get region settings */ 1696 case DVD_LU_SEND_RPC_STATE: 1697 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1698 setup_report_key(&cgc, 0, 8); 1699 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1700 cgc.buffer = (char *) &rpc_state; 1701 1702 if ((ret = cdo->generic_packet(cdi, &cgc))) 1703 return ret; 1704 1705 ai->lrpcs.type = rpc_state.type_code; 1706 ai->lrpcs.vra = rpc_state.vra; 1707 ai->lrpcs.ucca = rpc_state.ucca; 1708 ai->lrpcs.region_mask = rpc_state.region_mask; 1709 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1710 break; 1711 1712 /* Set region settings */ 1713 case DVD_HOST_SEND_RPC_STATE: 1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1715 setup_send_key(&cgc, 0, 6); 1716 buf[1] = 6; 1717 buf[4] = ai->hrpcs.pdrc; 1718 1719 if ((ret = cdo->generic_packet(cdi, &cgc))) 1720 return ret; 1721 break; 1722 1723 default: 1724 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1725 return -ENOTTY; 1726 } 1727 1728 return 0; 1729 } 1730 1731 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s) 1732 { 1733 unsigned char buf[21], *base; 1734 struct dvd_layer *layer; 1735 struct packet_command cgc; 1736 struct cdrom_device_ops *cdo = cdi->ops; 1737 int ret, layer_num = s->physical.layer_num; 1738 1739 if (layer_num >= DVD_LAYERS) 1740 return -EINVAL; 1741 1742 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1743 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1744 cgc.cmd[6] = layer_num; 1745 cgc.cmd[7] = s->type; 1746 cgc.cmd[9] = cgc.buflen & 0xff; 1747 1748 /* 1749 * refrain from reporting errors on non-existing layers (mainly) 1750 */ 1751 cgc.quiet = 1; 1752 1753 if ((ret = cdo->generic_packet(cdi, &cgc))) 1754 return ret; 1755 1756 base = &buf[4]; 1757 layer = &s->physical.layer[layer_num]; 1758 1759 /* 1760 * place the data... really ugly, but at least we won't have to 1761 * worry about endianess in userspace. 1762 */ 1763 memset(layer, 0, sizeof(*layer)); 1764 layer->book_version = base[0] & 0xf; 1765 layer->book_type = base[0] >> 4; 1766 layer->min_rate = base[1] & 0xf; 1767 layer->disc_size = base[1] >> 4; 1768 layer->layer_type = base[2] & 0xf; 1769 layer->track_path = (base[2] >> 4) & 1; 1770 layer->nlayers = (base[2] >> 5) & 3; 1771 layer->track_density = base[3] & 0xf; 1772 layer->linear_density = base[3] >> 4; 1773 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1774 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1775 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1776 layer->bca = base[16] >> 7; 1777 1778 return 0; 1779 } 1780 1781 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s) 1782 { 1783 int ret; 1784 u_char buf[8]; 1785 struct packet_command cgc; 1786 struct cdrom_device_ops *cdo = cdi->ops; 1787 1788 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1789 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1790 cgc.cmd[6] = s->copyright.layer_num; 1791 cgc.cmd[7] = s->type; 1792 cgc.cmd[8] = cgc.buflen >> 8; 1793 cgc.cmd[9] = cgc.buflen & 0xff; 1794 1795 if ((ret = cdo->generic_packet(cdi, &cgc))) 1796 return ret; 1797 1798 s->copyright.cpst = buf[4]; 1799 s->copyright.rmi = buf[5]; 1800 1801 return 0; 1802 } 1803 1804 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s) 1805 { 1806 int ret, size; 1807 u_char *buf; 1808 struct packet_command cgc; 1809 struct cdrom_device_ops *cdo = cdi->ops; 1810 1811 size = sizeof(s->disckey.value) + 4; 1812 1813 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL) 1814 return -ENOMEM; 1815 1816 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1817 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1818 cgc.cmd[7] = s->type; 1819 cgc.cmd[8] = size >> 8; 1820 cgc.cmd[9] = size & 0xff; 1821 cgc.cmd[10] = s->disckey.agid << 6; 1822 1823 if (!(ret = cdo->generic_packet(cdi, &cgc))) 1824 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1825 1826 kfree(buf); 1827 return ret; 1828 } 1829 1830 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s) 1831 { 1832 int ret; 1833 u_char buf[4 + 188]; 1834 struct packet_command cgc; 1835 struct cdrom_device_ops *cdo = cdi->ops; 1836 1837 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1838 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1839 cgc.cmd[7] = s->type; 1840 cgc.cmd[9] = cgc.buflen & 0xff; 1841 1842 if ((ret = cdo->generic_packet(cdi, &cgc))) 1843 return ret; 1844 1845 s->bca.len = buf[0] << 8 | buf[1]; 1846 if (s->bca.len < 12 || s->bca.len > 188) { 1847 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len); 1848 return -EIO; 1849 } 1850 memcpy(s->bca.value, &buf[4], s->bca.len); 1851 1852 return 0; 1853 } 1854 1855 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s) 1856 { 1857 int ret = 0, size; 1858 u_char *buf; 1859 struct packet_command cgc; 1860 struct cdrom_device_ops *cdo = cdi->ops; 1861 1862 size = sizeof(s->manufact.value) + 4; 1863 1864 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL) 1865 return -ENOMEM; 1866 1867 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1868 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1869 cgc.cmd[7] = s->type; 1870 cgc.cmd[8] = size >> 8; 1871 cgc.cmd[9] = size & 0xff; 1872 1873 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1874 kfree(buf); 1875 return ret; 1876 } 1877 1878 s->manufact.len = buf[0] << 8 | buf[1]; 1879 if (s->manufact.len < 0 || s->manufact.len > 2048) { 1880 cdinfo(CD_WARNING, "Received invalid manufacture info length" 1881 " (%d)\n", s->manufact.len); 1882 ret = -EIO; 1883 } else { 1884 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1885 } 1886 1887 kfree(buf); 1888 return ret; 1889 } 1890 1891 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s) 1892 { 1893 switch (s->type) { 1894 case DVD_STRUCT_PHYSICAL: 1895 return dvd_read_physical(cdi, s); 1896 1897 case DVD_STRUCT_COPYRIGHT: 1898 return dvd_read_copyright(cdi, s); 1899 1900 case DVD_STRUCT_DISCKEY: 1901 return dvd_read_disckey(cdi, s); 1902 1903 case DVD_STRUCT_BCA: 1904 return dvd_read_bca(cdi, s); 1905 1906 case DVD_STRUCT_MANUFACT: 1907 return dvd_read_manufact(cdi, s); 1908 1909 default: 1910 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1911 s->type); 1912 return -EINVAL; 1913 } 1914 } 1915 1916 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1917 struct packet_command *cgc, 1918 int page_code, int page_control) 1919 { 1920 struct cdrom_device_ops *cdo = cdi->ops; 1921 1922 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1923 1924 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1925 cgc->cmd[2] = page_code | (page_control << 6); 1926 cgc->cmd[7] = cgc->buflen >> 8; 1927 cgc->cmd[8] = cgc->buflen & 0xff; 1928 cgc->data_direction = CGC_DATA_READ; 1929 return cdo->generic_packet(cdi, cgc); 1930 } 1931 1932 int cdrom_mode_select(struct cdrom_device_info *cdi, 1933 struct packet_command *cgc) 1934 { 1935 struct cdrom_device_ops *cdo = cdi->ops; 1936 1937 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1938 memset(cgc->buffer, 0, 2); 1939 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 1940 cgc->cmd[1] = 0x10; /* PF */ 1941 cgc->cmd[7] = cgc->buflen >> 8; 1942 cgc->cmd[8] = cgc->buflen & 0xff; 1943 cgc->data_direction = CGC_DATA_WRITE; 1944 return cdo->generic_packet(cdi, cgc); 1945 } 1946 1947 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 1948 struct cdrom_subchnl *subchnl, int mcn) 1949 { 1950 struct cdrom_device_ops *cdo = cdi->ops; 1951 struct packet_command cgc; 1952 char buffer[32]; 1953 int ret; 1954 1955 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 1956 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 1957 cgc.cmd[1] = 2; /* MSF addressing */ 1958 cgc.cmd[2] = 0x40; /* request subQ data */ 1959 cgc.cmd[3] = mcn ? 2 : 1; 1960 cgc.cmd[8] = 16; 1961 1962 if ((ret = cdo->generic_packet(cdi, &cgc))) 1963 return ret; 1964 1965 subchnl->cdsc_audiostatus = cgc.buffer[1]; 1966 subchnl->cdsc_format = CDROM_MSF; 1967 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 1968 subchnl->cdsc_trk = cgc.buffer[6]; 1969 subchnl->cdsc_ind = cgc.buffer[7]; 1970 1971 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 1972 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 1973 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 1974 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 1975 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 1976 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 1977 1978 return 0; 1979 } 1980 1981 /* 1982 * Specific READ_10 interface 1983 */ 1984 static int cdrom_read_cd(struct cdrom_device_info *cdi, 1985 struct packet_command *cgc, int lba, 1986 int blocksize, int nblocks) 1987 { 1988 struct cdrom_device_ops *cdo = cdi->ops; 1989 1990 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 1991 cgc->cmd[0] = GPCMD_READ_10; 1992 cgc->cmd[2] = (lba >> 24) & 0xff; 1993 cgc->cmd[3] = (lba >> 16) & 0xff; 1994 cgc->cmd[4] = (lba >> 8) & 0xff; 1995 cgc->cmd[5] = lba & 0xff; 1996 cgc->cmd[6] = (nblocks >> 16) & 0xff; 1997 cgc->cmd[7] = (nblocks >> 8) & 0xff; 1998 cgc->cmd[8] = nblocks & 0xff; 1999 cgc->buflen = blocksize * nblocks; 2000 return cdo->generic_packet(cdi, cgc); 2001 } 2002 2003 /* very generic interface for reading the various types of blocks */ 2004 static int cdrom_read_block(struct cdrom_device_info *cdi, 2005 struct packet_command *cgc, 2006 int lba, int nblocks, int format, int blksize) 2007 { 2008 struct cdrom_device_ops *cdo = cdi->ops; 2009 2010 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2011 cgc->cmd[0] = GPCMD_READ_CD; 2012 /* expected sector size - cdda,mode1,etc. */ 2013 cgc->cmd[1] = format << 2; 2014 /* starting address */ 2015 cgc->cmd[2] = (lba >> 24) & 0xff; 2016 cgc->cmd[3] = (lba >> 16) & 0xff; 2017 cgc->cmd[4] = (lba >> 8) & 0xff; 2018 cgc->cmd[5] = lba & 0xff; 2019 /* number of blocks */ 2020 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2021 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2022 cgc->cmd[8] = nblocks & 0xff; 2023 cgc->buflen = blksize * nblocks; 2024 2025 /* set the header info returned */ 2026 switch (blksize) { 2027 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2028 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2029 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2030 default : cgc->cmd[9] = 0x10; 2031 } 2032 2033 return cdo->generic_packet(cdi, cgc); 2034 } 2035 2036 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2037 int lba, int nframes) 2038 { 2039 struct packet_command cgc; 2040 int ret = 0; 2041 int nr; 2042 2043 cdi->last_sense = 0; 2044 2045 memset(&cgc, 0, sizeof(cgc)); 2046 2047 /* 2048 * start with will ra.nframes size, back down if alloc fails 2049 */ 2050 nr = nframes; 2051 do { 2052 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2053 if (cgc.buffer) 2054 break; 2055 2056 nr >>= 1; 2057 } while (nr); 2058 2059 if (!nr) 2060 return -ENOMEM; 2061 2062 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) { 2063 ret = -EFAULT; 2064 goto out; 2065 } 2066 2067 cgc.data_direction = CGC_DATA_READ; 2068 while (nframes > 0) { 2069 if (nr > nframes) 2070 nr = nframes; 2071 2072 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2073 if (ret) 2074 break; 2075 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2076 ret = -EFAULT; 2077 break; 2078 } 2079 ubuf += CD_FRAMESIZE_RAW * nr; 2080 nframes -= nr; 2081 lba += nr; 2082 } 2083 out: 2084 kfree(cgc.buffer); 2085 return ret; 2086 } 2087 2088 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2089 int lba, int nframes) 2090 { 2091 request_queue_t *q = cdi->disk->queue; 2092 struct request *rq; 2093 struct bio *bio; 2094 unsigned int len; 2095 int nr, ret = 0; 2096 2097 if (!q) 2098 return -ENXIO; 2099 2100 rq = blk_get_request(q, READ, GFP_KERNEL); 2101 if (!rq) 2102 return -ENOMEM; 2103 2104 cdi->last_sense = 0; 2105 2106 while (nframes) { 2107 nr = nframes; 2108 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2109 nr = 1; 2110 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9)) 2111 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW; 2112 2113 len = nr * CD_FRAMESIZE_RAW; 2114 2115 ret = blk_rq_map_user(q, rq, ubuf, len); 2116 if (ret) 2117 break; 2118 2119 memset(rq->cmd, 0, sizeof(rq->cmd)); 2120 rq->cmd[0] = GPCMD_READ_CD; 2121 rq->cmd[1] = 1 << 2; 2122 rq->cmd[2] = (lba >> 24) & 0xff; 2123 rq->cmd[3] = (lba >> 16) & 0xff; 2124 rq->cmd[4] = (lba >> 8) & 0xff; 2125 rq->cmd[5] = lba & 0xff; 2126 rq->cmd[6] = (nr >> 16) & 0xff; 2127 rq->cmd[7] = (nr >> 8) & 0xff; 2128 rq->cmd[8] = nr & 0xff; 2129 rq->cmd[9] = 0xf8; 2130 2131 rq->cmd_len = 12; 2132 rq->cmd_type = REQ_TYPE_BLOCK_PC; 2133 rq->timeout = 60 * HZ; 2134 bio = rq->bio; 2135 2136 if (blk_execute_rq(q, cdi->disk, rq, 0)) { 2137 struct request_sense *s = rq->sense; 2138 ret = -EIO; 2139 cdi->last_sense = s->sense_key; 2140 } 2141 2142 rq->bio = bio; 2143 if (blk_rq_unmap_user(rq)) 2144 ret = -EFAULT; 2145 2146 if (ret) 2147 break; 2148 2149 nframes -= nr; 2150 lba += nr; 2151 ubuf += len; 2152 } 2153 2154 blk_put_request(rq); 2155 return ret; 2156 } 2157 2158 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2159 int lba, int nframes) 2160 { 2161 int ret; 2162 2163 if (cdi->cdda_method == CDDA_OLD) 2164 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2165 2166 retry: 2167 /* 2168 * for anything else than success and io error, we need to retry 2169 */ 2170 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2171 if (!ret || ret != -EIO) 2172 return ret; 2173 2174 /* 2175 * I've seen drives get sense 4/8/3 udma crc errors on multi 2176 * frame dma, so drop to single frame dma if we need to 2177 */ 2178 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2179 printk("cdrom: dropping to single frame dma\n"); 2180 cdi->cdda_method = CDDA_BPC_SINGLE; 2181 goto retry; 2182 } 2183 2184 /* 2185 * so we have an io error of some sort with multi frame dma. if the 2186 * condition wasn't a hardware error 2187 * problems, not for any error 2188 */ 2189 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2190 return ret; 2191 2192 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2193 cdi->cdda_method = CDDA_OLD; 2194 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2195 } 2196 2197 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2198 void __user *argp) 2199 { 2200 struct cdrom_multisession ms_info; 2201 u8 requested_format; 2202 int ret; 2203 2204 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2205 2206 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2207 return -ENOSYS; 2208 2209 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2210 return -EFAULT; 2211 2212 requested_format = ms_info.addr_format; 2213 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2214 return -EINVAL; 2215 ms_info.addr_format = CDROM_LBA; 2216 2217 ret = cdi->ops->get_last_session(cdi, &ms_info); 2218 if (ret) 2219 return ret; 2220 2221 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2222 2223 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2224 return -EFAULT; 2225 2226 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2227 return 0; 2228 } 2229 2230 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2231 { 2232 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2233 2234 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2235 return -ENOSYS; 2236 if (cdi->use_count != 1 || keeplocked) 2237 return -EBUSY; 2238 if (CDROM_CAN(CDC_LOCK)) { 2239 int ret = cdi->ops->lock_door(cdi, 0); 2240 if (ret) 2241 return ret; 2242 } 2243 2244 return cdi->ops->tray_move(cdi, 1); 2245 } 2246 2247 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2248 { 2249 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2250 2251 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2252 return -ENOSYS; 2253 return cdi->ops->tray_move(cdi, 0); 2254 } 2255 2256 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2257 unsigned long arg) 2258 { 2259 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2260 2261 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2262 return -ENOSYS; 2263 if (keeplocked) 2264 return -EBUSY; 2265 2266 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2267 if (arg) 2268 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2269 return 0; 2270 } 2271 2272 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2273 unsigned long arg) 2274 { 2275 struct cdrom_changer_info *info; 2276 int ret; 2277 2278 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2279 2280 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2281 return -ENOSYS; 2282 2283 /* cannot select disc or select current disc */ 2284 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2285 return media_changed(cdi, 1); 2286 2287 if ((unsigned int)arg >= cdi->capacity) 2288 return -EINVAL; 2289 2290 info = kmalloc(sizeof(*info), GFP_KERNEL); 2291 if (!info) 2292 return -ENOMEM; 2293 2294 ret = cdrom_read_mech_status(cdi, info); 2295 if (!ret) 2296 ret = info->slots[arg].change; 2297 kfree(info); 2298 return ret; 2299 } 2300 2301 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2302 unsigned long arg) 2303 { 2304 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2305 2306 /* 2307 * Options need to be in sync with capability. 2308 * Too late for that, so we have to check each one separately. 2309 */ 2310 switch (arg) { 2311 case CDO_USE_FFLAGS: 2312 case CDO_CHECK_TYPE: 2313 break; 2314 case CDO_LOCK: 2315 if (!CDROM_CAN(CDC_LOCK)) 2316 return -ENOSYS; 2317 break; 2318 case 0: 2319 return cdi->options; 2320 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2321 default: 2322 if (!CDROM_CAN(arg)) 2323 return -ENOSYS; 2324 } 2325 cdi->options |= (int) arg; 2326 return cdi->options; 2327 } 2328 2329 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2330 unsigned long arg) 2331 { 2332 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2333 2334 cdi->options &= ~(int) arg; 2335 return cdi->options; 2336 } 2337 2338 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2339 unsigned long arg) 2340 { 2341 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2342 2343 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2344 return -ENOSYS; 2345 return cdi->ops->select_speed(cdi, arg); 2346 } 2347 2348 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2349 unsigned long arg) 2350 { 2351 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2352 2353 if (!CDROM_CAN(CDC_SELECT_DISC)) 2354 return -ENOSYS; 2355 2356 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2357 if ((int)arg >= cdi->capacity) 2358 return -EINVAL; 2359 } 2360 2361 /* 2362 * ->select_disc is a hook to allow a driver-specific way of 2363 * seleting disc. However, since there is no equivalent hook for 2364 * cdrom_slot_status this may not actually be useful... 2365 */ 2366 if (cdi->ops->select_disc) 2367 return cdi->ops->select_disc(cdi, arg); 2368 2369 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2370 return cdrom_select_disc(cdi, arg); 2371 } 2372 2373 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2374 struct block_device *bdev) 2375 { 2376 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2377 2378 if (!capable(CAP_SYS_ADMIN)) 2379 return -EACCES; 2380 if (!CDROM_CAN(CDC_RESET)) 2381 return -ENOSYS; 2382 invalidate_bdev(bdev, 0); 2383 return cdi->ops->reset(cdi); 2384 } 2385 2386 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2387 unsigned long arg) 2388 { 2389 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl"); 2390 2391 if (!CDROM_CAN(CDC_LOCK)) 2392 return -EDRIVE_CANT_DO_THIS; 2393 2394 keeplocked = arg ? 1 : 0; 2395 2396 /* 2397 * Don't unlock the door on multiple opens by default, but allow 2398 * root to do so. 2399 */ 2400 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2401 return -EBUSY; 2402 return cdi->ops->lock_door(cdi, arg); 2403 } 2404 2405 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2406 unsigned long arg) 2407 { 2408 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis"); 2409 2410 if (!capable(CAP_SYS_ADMIN)) 2411 return -EACCES; 2412 debug = arg ? 1 : 0; 2413 return debug; 2414 } 2415 2416 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2417 { 2418 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2419 return (cdi->ops->capability & ~cdi->mask); 2420 } 2421 2422 /* 2423 * The following function is implemented, although very few audio 2424 * discs give Universal Product Code information, which should just be 2425 * the Medium Catalog Number on the box. Note, that the way the code 2426 * is written on the CD is /not/ uniform across all discs! 2427 */ 2428 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2429 void __user *argp) 2430 { 2431 struct cdrom_mcn mcn; 2432 int ret; 2433 2434 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2435 2436 if (!(cdi->ops->capability & CDC_MCN)) 2437 return -ENOSYS; 2438 ret = cdi->ops->get_mcn(cdi, &mcn); 2439 if (ret) 2440 return ret; 2441 2442 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2443 return -EFAULT; 2444 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2445 return 0; 2446 } 2447 2448 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2449 unsigned long arg) 2450 { 2451 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2452 2453 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2454 return -ENOSYS; 2455 if (!CDROM_CAN(CDC_SELECT_DISC) || 2456 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2457 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2458 if (((int)arg >= cdi->capacity)) 2459 return -EINVAL; 2460 return cdrom_slot_status(cdi, arg); 2461 } 2462 2463 /* 2464 * Ok, this is where problems start. The current interface for the 2465 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2466 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this 2467 * is often the case, it is also very common for CDs to have some tracks 2468 * with data, and some tracks with audio. Just because I feel like it, 2469 * I declare the following to be the best way to cope. If the CD has ANY 2470 * data tracks on it, it will be returned as a data CD. If it has any XA 2471 * tracks, I will return it as that. Now I could simplify this interface 2472 * by combining these returns with the above, but this more clearly 2473 * demonstrates the problem with the current interface. Too bad this 2474 * wasn't designed to use bitmasks... -Erik 2475 * 2476 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2477 * User level programmers might feel the ioctl is not very useful. 2478 * ---david 2479 */ 2480 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2481 { 2482 tracktype tracks; 2483 2484 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2485 2486 cdrom_count_tracks(cdi, &tracks); 2487 if (tracks.error) 2488 return tracks.error; 2489 2490 /* Policy mode on */ 2491 if (tracks.audio > 0) { 2492 if (!tracks.data && !tracks.cdi && !tracks.xa) 2493 return CDS_AUDIO; 2494 else 2495 return CDS_MIXED; 2496 } 2497 2498 if (tracks.cdi > 0) 2499 return CDS_XA_2_2; 2500 if (tracks.xa > 0) 2501 return CDS_XA_2_1; 2502 if (tracks.data > 0) 2503 return CDS_DATA_1; 2504 /* Policy mode off */ 2505 2506 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n"); 2507 return CDS_NO_INFO; 2508 } 2509 2510 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2511 { 2512 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2513 return cdi->capacity; 2514 } 2515 2516 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2517 void __user *argp) 2518 { 2519 struct cdrom_subchnl q; 2520 u8 requested, back; 2521 int ret; 2522 2523 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2524 2525 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2526 return -ENOSYS; 2527 if (copy_from_user(&q, argp, sizeof(q))) 2528 return -EFAULT; 2529 2530 requested = q.cdsc_format; 2531 if (requested != CDROM_MSF && requested != CDROM_LBA) 2532 return -EINVAL; 2533 q.cdsc_format = CDROM_MSF; 2534 2535 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2536 if (ret) 2537 return ret; 2538 2539 back = q.cdsc_format; /* local copy */ 2540 sanitize_format(&q.cdsc_absaddr, &back, requested); 2541 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2542 2543 if (copy_to_user(argp, &q, sizeof(q))) 2544 return -EFAULT; 2545 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2546 return 0; 2547 } 2548 2549 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2550 void __user *argp) 2551 { 2552 struct cdrom_tochdr header; 2553 int ret; 2554 2555 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2556 2557 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2558 return -ENOSYS; 2559 if (copy_from_user(&header, argp, sizeof(header))) 2560 return -EFAULT; 2561 2562 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2563 if (ret) 2564 return ret; 2565 2566 if (copy_to_user(argp, &header, sizeof(header))) 2567 return -EFAULT; 2568 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2569 return 0; 2570 } 2571 2572 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2573 void __user *argp) 2574 { 2575 struct cdrom_tocentry entry; 2576 u8 requested_format; 2577 int ret; 2578 2579 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2580 2581 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2582 return -ENOSYS; 2583 if (copy_from_user(&entry, argp, sizeof(entry))) 2584 return -EFAULT; 2585 2586 requested_format = entry.cdte_format; 2587 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2588 return -EINVAL; 2589 /* make interface to low-level uniform */ 2590 entry.cdte_format = CDROM_MSF; 2591 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2592 if (ret) 2593 return ret; 2594 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2595 2596 if (copy_to_user(argp, &entry, sizeof(entry))) 2597 return -EFAULT; 2598 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2599 return 0; 2600 } 2601 2602 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2603 void __user *argp) 2604 { 2605 struct cdrom_msf msf; 2606 2607 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2608 2609 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2610 return -ENOSYS; 2611 if (copy_from_user(&msf, argp, sizeof(msf))) 2612 return -EFAULT; 2613 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2614 } 2615 2616 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2617 void __user *argp) 2618 { 2619 struct cdrom_ti ti; 2620 int ret; 2621 2622 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2623 2624 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2625 return -ENOSYS; 2626 if (copy_from_user(&ti, argp, sizeof(ti))) 2627 return -EFAULT; 2628 2629 ret = check_for_audio_disc(cdi, cdi->ops); 2630 if (ret) 2631 return ret; 2632 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2633 } 2634 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2635 void __user *argp) 2636 { 2637 struct cdrom_volctrl volume; 2638 2639 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2640 2641 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2642 return -ENOSYS; 2643 if (copy_from_user(&volume, argp, sizeof(volume))) 2644 return -EFAULT; 2645 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2646 } 2647 2648 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2649 void __user *argp) 2650 { 2651 struct cdrom_volctrl volume; 2652 int ret; 2653 2654 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2655 2656 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2657 return -ENOSYS; 2658 2659 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2660 if (ret) 2661 return ret; 2662 2663 if (copy_to_user(argp, &volume, sizeof(volume))) 2664 return -EFAULT; 2665 return 0; 2666 } 2667 2668 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2669 unsigned int cmd) 2670 { 2671 int ret; 2672 2673 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2674 2675 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2676 return -ENOSYS; 2677 ret = check_for_audio_disc(cdi, cdi->ops); 2678 if (ret) 2679 return ret; 2680 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2681 } 2682 2683 /* 2684 * Just about every imaginable ioctl is supported in the Uniform layer 2685 * these days. 2686 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 2687 */ 2688 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi, 2689 struct inode *ip, unsigned int cmd, unsigned long arg) 2690 { 2691 void __user *argp = (void __user *)arg; 2692 int ret; 2693 2694 /* 2695 * Try the generic SCSI command ioctl's first. 2696 */ 2697 ret = scsi_cmd_ioctl(file, ip->i_bdev->bd_disk, cmd, argp); 2698 if (ret != -ENOTTY) 2699 return ret; 2700 2701 switch (cmd) { 2702 case CDROMMULTISESSION: 2703 return cdrom_ioctl_multisession(cdi, argp); 2704 case CDROMEJECT: 2705 return cdrom_ioctl_eject(cdi); 2706 case CDROMCLOSETRAY: 2707 return cdrom_ioctl_closetray(cdi); 2708 case CDROMEJECT_SW: 2709 return cdrom_ioctl_eject_sw(cdi, arg); 2710 case CDROM_MEDIA_CHANGED: 2711 return cdrom_ioctl_media_changed(cdi, arg); 2712 case CDROM_SET_OPTIONS: 2713 return cdrom_ioctl_set_options(cdi, arg); 2714 case CDROM_CLEAR_OPTIONS: 2715 return cdrom_ioctl_clear_options(cdi, arg); 2716 case CDROM_SELECT_SPEED: 2717 return cdrom_ioctl_select_speed(cdi, arg); 2718 case CDROM_SELECT_DISC: 2719 return cdrom_ioctl_select_disc(cdi, arg); 2720 case CDROMRESET: 2721 return cdrom_ioctl_reset(cdi, ip->i_bdev); 2722 case CDROM_LOCKDOOR: 2723 return cdrom_ioctl_lock_door(cdi, arg); 2724 case CDROM_DEBUG: 2725 return cdrom_ioctl_debug(cdi, arg); 2726 case CDROM_GET_CAPABILITY: 2727 return cdrom_ioctl_get_capability(cdi); 2728 case CDROM_GET_MCN: 2729 return cdrom_ioctl_get_mcn(cdi, argp); 2730 case CDROM_DRIVE_STATUS: 2731 return cdrom_ioctl_drive_status(cdi, arg); 2732 case CDROM_DISC_STATUS: 2733 return cdrom_ioctl_disc_status(cdi); 2734 case CDROM_CHANGER_NSLOTS: 2735 return cdrom_ioctl_changer_nslots(cdi); 2736 } 2737 2738 /* 2739 * Use the ioctls that are implemented through the generic_packet() 2740 * interface. this may look at bit funny, but if -ENOTTY is 2741 * returned that particular ioctl is not implemented and we 2742 * let it go through the device specific ones. 2743 */ 2744 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 2745 ret = mmc_ioctl(cdi, cmd, arg); 2746 if (ret != -ENOTTY) 2747 return ret; 2748 } 2749 2750 /* 2751 * Note: most of the cdinfo() calls are commented out here, 2752 * because they fill up the sys log when CD players poll 2753 * the drive. 2754 */ 2755 switch (cmd) { 2756 case CDROMSUBCHNL: 2757 return cdrom_ioctl_get_subchnl(cdi, argp); 2758 case CDROMREADTOCHDR: 2759 return cdrom_ioctl_read_tochdr(cdi, argp); 2760 case CDROMREADTOCENTRY: 2761 return cdrom_ioctl_read_tocentry(cdi, argp); 2762 case CDROMPLAYMSF: 2763 return cdrom_ioctl_play_msf(cdi, argp); 2764 case CDROMPLAYTRKIND: 2765 return cdrom_ioctl_play_trkind(cdi, argp); 2766 case CDROMVOLCTRL: 2767 return cdrom_ioctl_volctrl(cdi, argp); 2768 case CDROMVOLREAD: 2769 return cdrom_ioctl_volread(cdi, argp); 2770 case CDROMSTART: 2771 case CDROMSTOP: 2772 case CDROMPAUSE: 2773 case CDROMRESUME: 2774 return cdrom_ioctl_audioctl(cdi, cmd); 2775 } 2776 2777 return -ENOSYS; 2778 } 2779 2780 static inline 2781 int msf_to_lba(char m, char s, char f) 2782 { 2783 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; 2784 } 2785 2786 /* 2787 * Required when we need to use READ_10 to issue other than 2048 block 2788 * reads 2789 */ 2790 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2791 { 2792 struct cdrom_device_ops *cdo = cdi->ops; 2793 struct packet_command cgc; 2794 struct modesel_head mh; 2795 2796 memset(&mh, 0, sizeof(mh)); 2797 mh.block_desc_length = 0x08; 2798 mh.block_length_med = (size >> 8) & 0xff; 2799 mh.block_length_lo = size & 0xff; 2800 2801 memset(&cgc, 0, sizeof(cgc)); 2802 cgc.cmd[0] = 0x15; 2803 cgc.cmd[1] = 1 << 4; 2804 cgc.cmd[4] = 12; 2805 cgc.buflen = sizeof(mh); 2806 cgc.buffer = (char *) &mh; 2807 cgc.data_direction = CGC_DATA_WRITE; 2808 mh.block_desc_length = 0x08; 2809 mh.block_length_med = (size >> 8) & 0xff; 2810 mh.block_length_lo = size & 0xff; 2811 2812 return cdo->generic_packet(cdi, &cgc); 2813 } 2814 2815 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 2816 unsigned long arg) 2817 { 2818 struct cdrom_device_ops *cdo = cdi->ops; 2819 struct packet_command cgc; 2820 struct request_sense sense; 2821 unsigned char buffer[32]; 2822 int ret = 0; 2823 2824 memset(&cgc, 0, sizeof(cgc)); 2825 2826 /* build a unified command and queue it through 2827 cdo->generic_packet() */ 2828 switch (cmd) { 2829 case CDROMREADRAW: 2830 case CDROMREADMODE1: 2831 case CDROMREADMODE2: { 2832 struct cdrom_msf msf; 2833 int blocksize = 0, format = 0, lba; 2834 2835 switch (cmd) { 2836 case CDROMREADRAW: 2837 blocksize = CD_FRAMESIZE_RAW; 2838 break; 2839 case CDROMREADMODE1: 2840 blocksize = CD_FRAMESIZE; 2841 format = 2; 2842 break; 2843 case CDROMREADMODE2: 2844 blocksize = CD_FRAMESIZE_RAW0; 2845 break; 2846 } 2847 IOCTL_IN(arg, struct cdrom_msf, msf); 2848 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0); 2849 /* FIXME: we need upper bound checking, too!! */ 2850 if (lba < 0) 2851 return -EINVAL; 2852 cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL); 2853 if (cgc.buffer == NULL) 2854 return -ENOMEM; 2855 memset(&sense, 0, sizeof(sense)); 2856 cgc.sense = &sense; 2857 cgc.data_direction = CGC_DATA_READ; 2858 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize); 2859 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) { 2860 /* 2861 * SCSI-II devices are not required to support 2862 * READ_CD, so let's try switching block size 2863 */ 2864 /* FIXME: switch back again... */ 2865 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) { 2866 kfree(cgc.buffer); 2867 return ret; 2868 } 2869 cgc.sense = NULL; 2870 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1); 2871 ret |= cdrom_switch_blocksize(cdi, blocksize); 2872 } 2873 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize)) 2874 ret = -EFAULT; 2875 kfree(cgc.buffer); 2876 return ret; 2877 } 2878 case CDROMREADAUDIO: { 2879 struct cdrom_read_audio ra; 2880 int lba; 2881 2882 IOCTL_IN(arg, struct cdrom_read_audio, ra); 2883 2884 if (ra.addr_format == CDROM_MSF) 2885 lba = msf_to_lba(ra.addr.msf.minute, 2886 ra.addr.msf.second, 2887 ra.addr.msf.frame); 2888 else if (ra.addr_format == CDROM_LBA) 2889 lba = ra.addr.lba; 2890 else 2891 return -EINVAL; 2892 2893 /* FIXME: we need upper bound checking, too!! */ 2894 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 2895 return -EINVAL; 2896 2897 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 2898 } 2899 case CDROMSUBCHNL: { 2900 struct cdrom_subchnl q; 2901 u_char requested, back; 2902 IOCTL_IN(arg, struct cdrom_subchnl, q); 2903 requested = q.cdsc_format; 2904 if (!((requested == CDROM_MSF) || 2905 (requested == CDROM_LBA))) 2906 return -EINVAL; 2907 q.cdsc_format = CDROM_MSF; 2908 if ((ret = cdrom_read_subchannel(cdi, &q, 0))) 2909 return ret; 2910 back = q.cdsc_format; /* local copy */ 2911 sanitize_format(&q.cdsc_absaddr, &back, requested); 2912 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2913 IOCTL_OUT(arg, struct cdrom_subchnl, q); 2914 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2915 return 0; 2916 } 2917 case CDROMPLAYMSF: { 2918 struct cdrom_msf msf; 2919 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2920 IOCTL_IN(arg, struct cdrom_msf, msf); 2921 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 2922 cgc.cmd[3] = msf.cdmsf_min0; 2923 cgc.cmd[4] = msf.cdmsf_sec0; 2924 cgc.cmd[5] = msf.cdmsf_frame0; 2925 cgc.cmd[6] = msf.cdmsf_min1; 2926 cgc.cmd[7] = msf.cdmsf_sec1; 2927 cgc.cmd[8] = msf.cdmsf_frame1; 2928 cgc.data_direction = CGC_DATA_NONE; 2929 return cdo->generic_packet(cdi, &cgc); 2930 } 2931 case CDROMPLAYBLK: { 2932 struct cdrom_blk blk; 2933 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 2934 IOCTL_IN(arg, struct cdrom_blk, blk); 2935 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10; 2936 cgc.cmd[2] = (blk.from >> 24) & 0xff; 2937 cgc.cmd[3] = (blk.from >> 16) & 0xff; 2938 cgc.cmd[4] = (blk.from >> 8) & 0xff; 2939 cgc.cmd[5] = blk.from & 0xff; 2940 cgc.cmd[7] = (blk.len >> 8) & 0xff; 2941 cgc.cmd[8] = blk.len & 0xff; 2942 cgc.data_direction = CGC_DATA_NONE; 2943 return cdo->generic_packet(cdi, &cgc); 2944 } 2945 case CDROMVOLCTRL: 2946 case CDROMVOLREAD: { 2947 struct cdrom_volctrl volctrl; 2948 char mask[sizeof(buffer)]; 2949 unsigned short offset; 2950 2951 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 2952 2953 IOCTL_IN(arg, struct cdrom_volctrl, volctrl); 2954 2955 cgc.buffer = buffer; 2956 cgc.buflen = 24; 2957 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0))) 2958 return ret; 2959 2960 /* originally the code depended on buffer[1] to determine 2961 how much data is available for transfer. buffer[1] is 2962 unfortunately ambigious and the only reliable way seem 2963 to be to simply skip over the block descriptor... */ 2964 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6)); 2965 2966 if (offset + 16 > sizeof(buffer)) 2967 return -E2BIG; 2968 2969 if (offset + 16 > cgc.buflen) { 2970 cgc.buflen = offset+16; 2971 ret = cdrom_mode_sense(cdi, &cgc, 2972 GPMODE_AUDIO_CTL_PAGE, 0); 2973 if (ret) 2974 return ret; 2975 } 2976 2977 /* sanity check */ 2978 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 2979 buffer[offset+1] < 14) 2980 return -EINVAL; 2981 2982 /* now we have the current volume settings. if it was only 2983 a CDROMVOLREAD, return these values */ 2984 if (cmd == CDROMVOLREAD) { 2985 volctrl.channel0 = buffer[offset+9]; 2986 volctrl.channel1 = buffer[offset+11]; 2987 volctrl.channel2 = buffer[offset+13]; 2988 volctrl.channel3 = buffer[offset+15]; 2989 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl); 2990 return 0; 2991 } 2992 2993 /* get the volume mask */ 2994 cgc.buffer = mask; 2995 if ((ret = cdrom_mode_sense(cdi, &cgc, 2996 GPMODE_AUDIO_CTL_PAGE, 1))) 2997 return ret; 2998 2999 buffer[offset+9] = volctrl.channel0 & mask[offset+9]; 3000 buffer[offset+11] = volctrl.channel1 & mask[offset+11]; 3001 buffer[offset+13] = volctrl.channel2 & mask[offset+13]; 3002 buffer[offset+15] = volctrl.channel3 & mask[offset+15]; 3003 3004 /* set volume */ 3005 cgc.buffer = buffer + offset - 8; 3006 memset(cgc.buffer, 0, 8); 3007 return cdrom_mode_select(cdi, &cgc); 3008 } 3009 3010 case CDROMSTART: 3011 case CDROMSTOP: { 3012 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3013 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 3014 cgc.cmd[1] = 1; 3015 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3016 cgc.data_direction = CGC_DATA_NONE; 3017 return cdo->generic_packet(cdi, &cgc); 3018 } 3019 3020 case CDROMPAUSE: 3021 case CDROMRESUME: { 3022 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3023 cgc.cmd[0] = GPCMD_PAUSE_RESUME; 3024 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3025 cgc.data_direction = CGC_DATA_NONE; 3026 return cdo->generic_packet(cdi, &cgc); 3027 } 3028 3029 case DVD_READ_STRUCT: { 3030 dvd_struct *s; 3031 int size = sizeof(dvd_struct); 3032 if (!CDROM_CAN(CDC_DVD)) 3033 return -ENOSYS; 3034 if ((s = (dvd_struct *) kmalloc(size, GFP_KERNEL)) == NULL) 3035 return -ENOMEM; 3036 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3037 if (copy_from_user(s, (dvd_struct __user *)arg, size)) { 3038 kfree(s); 3039 return -EFAULT; 3040 } 3041 if ((ret = dvd_read_struct(cdi, s))) { 3042 kfree(s); 3043 return ret; 3044 } 3045 if (copy_to_user((dvd_struct __user *)arg, s, size)) 3046 ret = -EFAULT; 3047 kfree(s); 3048 return ret; 3049 } 3050 3051 case DVD_AUTH: { 3052 dvd_authinfo ai; 3053 if (!CDROM_CAN(CDC_DVD)) 3054 return -ENOSYS; 3055 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3056 IOCTL_IN(arg, dvd_authinfo, ai); 3057 if ((ret = dvd_do_auth (cdi, &ai))) 3058 return ret; 3059 IOCTL_OUT(arg, dvd_authinfo, ai); 3060 return 0; 3061 } 3062 3063 case CDROM_NEXT_WRITABLE: { 3064 long next = 0; 3065 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3066 if ((ret = cdrom_get_next_writable(cdi, &next))) 3067 return ret; 3068 IOCTL_OUT(arg, long, next); 3069 return 0; 3070 } 3071 case CDROM_LAST_WRITTEN: { 3072 long last = 0; 3073 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3074 if ((ret = cdrom_get_last_written(cdi, &last))) 3075 return ret; 3076 IOCTL_OUT(arg, long, last); 3077 return 0; 3078 } 3079 } /* switch */ 3080 3081 return -ENOTTY; 3082 } 3083 3084 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type, 3085 track_information *ti) 3086 { 3087 struct cdrom_device_ops *cdo = cdi->ops; 3088 struct packet_command cgc; 3089 int ret, buflen; 3090 3091 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 3092 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 3093 cgc.cmd[1] = type & 3; 3094 cgc.cmd[4] = (track & 0xff00) >> 8; 3095 cgc.cmd[5] = track & 0xff; 3096 cgc.cmd[8] = 8; 3097 cgc.quiet = 1; 3098 3099 if ((ret = cdo->generic_packet(cdi, &cgc))) 3100 return ret; 3101 3102 buflen = be16_to_cpu(ti->track_information_length) + 3103 sizeof(ti->track_information_length); 3104 3105 if (buflen > sizeof(track_information)) 3106 buflen = sizeof(track_information); 3107 3108 cgc.cmd[8] = cgc.buflen = buflen; 3109 if ((ret = cdo->generic_packet(cdi, &cgc))) 3110 return ret; 3111 3112 /* return actual fill size */ 3113 return buflen; 3114 } 3115 3116 /* requires CD R/RW */ 3117 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) 3118 { 3119 struct cdrom_device_ops *cdo = cdi->ops; 3120 struct packet_command cgc; 3121 int ret, buflen; 3122 3123 /* set up command and get the disc info */ 3124 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 3125 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 3126 cgc.cmd[8] = cgc.buflen = 2; 3127 cgc.quiet = 1; 3128 3129 if ((ret = cdo->generic_packet(cdi, &cgc))) 3130 return ret; 3131 3132 /* not all drives have the same disc_info length, so requeue 3133 * packet with the length the drive tells us it can supply 3134 */ 3135 buflen = be16_to_cpu(di->disc_information_length) + 3136 sizeof(di->disc_information_length); 3137 3138 if (buflen > sizeof(disc_information)) 3139 buflen = sizeof(disc_information); 3140 3141 cgc.cmd[8] = cgc.buflen = buflen; 3142 if ((ret = cdo->generic_packet(cdi, &cgc))) 3143 return ret; 3144 3145 /* return actual fill size */ 3146 return buflen; 3147 } 3148 3149 /* return the last written block on the CD-R media. this is for the udf 3150 file system. */ 3151 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 3152 { 3153 struct cdrom_tocentry toc; 3154 disc_information di; 3155 track_information ti; 3156 __u32 last_track; 3157 int ret = -1, ti_size; 3158 3159 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3160 goto use_toc; 3161 3162 ret = cdrom_get_disc_info(cdi, &di); 3163 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 3164 + sizeof(di.last_track_lsb))) 3165 goto use_toc; 3166 3167 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3168 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3169 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3170 if (ti_size < (int)offsetof(typeof(ti), track_start)) 3171 goto use_toc; 3172 3173 /* if this track is blank, try the previous. */ 3174 if (ti.blank) { 3175 if (last_track==1) 3176 goto use_toc; 3177 last_track--; 3178 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3179 } 3180 3181 if (ti_size < (int)(offsetof(typeof(ti), track_size) 3182 + sizeof(ti.track_size))) 3183 goto use_toc; 3184 3185 /* if last recorded field is valid, return it. */ 3186 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 3187 + sizeof(ti.last_rec_address))) { 3188 *last_written = be32_to_cpu(ti.last_rec_address); 3189 } else { 3190 /* make it up instead */ 3191 *last_written = be32_to_cpu(ti.track_start) + 3192 be32_to_cpu(ti.track_size); 3193 if (ti.free_blocks) 3194 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 3195 } 3196 return 0; 3197 3198 /* this is where we end up if the drive either can't do a 3199 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 3200 it doesn't give enough information or fails. then we return 3201 the toc contents. */ 3202 use_toc: 3203 toc.cdte_format = CDROM_MSF; 3204 toc.cdte_track = CDROM_LEADOUT; 3205 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 3206 return ret; 3207 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 3208 *last_written = toc.cdte_addr.lba; 3209 return 0; 3210 } 3211 3212 /* return the next writable block. also for udf file system. */ 3213 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable) 3214 { 3215 disc_information di; 3216 track_information ti; 3217 __u16 last_track; 3218 int ret, ti_size; 3219 3220 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3221 goto use_last_written; 3222 3223 ret = cdrom_get_disc_info(cdi, &di); 3224 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 3225 + sizeof(di.last_track_lsb)) 3226 goto use_last_written; 3227 3228 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3229 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3230 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3231 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 3232 goto use_last_written; 3233 3234 /* if this track is blank, try the previous. */ 3235 if (ti.blank) { 3236 if (last_track == 1) 3237 goto use_last_written; 3238 last_track--; 3239 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3240 if (ti_size < 0) 3241 goto use_last_written; 3242 } 3243 3244 /* if next recordable address field is valid, use it. */ 3245 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 3246 + sizeof(ti.next_writable)) { 3247 *next_writable = be32_to_cpu(ti.next_writable); 3248 return 0; 3249 } 3250 3251 use_last_written: 3252 if ((ret = cdrom_get_last_written(cdi, next_writable))) { 3253 *next_writable = 0; 3254 return ret; 3255 } else { 3256 *next_writable += 7; 3257 return 0; 3258 } 3259 } 3260 3261 EXPORT_SYMBOL(cdrom_get_last_written); 3262 EXPORT_SYMBOL(register_cdrom); 3263 EXPORT_SYMBOL(unregister_cdrom); 3264 EXPORT_SYMBOL(cdrom_open); 3265 EXPORT_SYMBOL(cdrom_release); 3266 EXPORT_SYMBOL(cdrom_ioctl); 3267 EXPORT_SYMBOL(cdrom_media_changed); 3268 EXPORT_SYMBOL(cdrom_number_of_slots); 3269 EXPORT_SYMBOL(cdrom_mode_select); 3270 EXPORT_SYMBOL(cdrom_mode_sense); 3271 EXPORT_SYMBOL(init_cdrom_command); 3272 EXPORT_SYMBOL(cdrom_get_media_event); 3273 3274 #ifdef CONFIG_SYSCTL 3275 3276 #define CDROM_STR_SIZE 1000 3277 3278 static struct cdrom_sysctl_settings { 3279 char info[CDROM_STR_SIZE]; /* general info */ 3280 int autoclose; /* close tray upon mount, etc */ 3281 int autoeject; /* eject on umount */ 3282 int debug; /* turn on debugging messages */ 3283 int lock; /* lock the door on device open */ 3284 int check; /* check media type */ 3285 } cdrom_sysctl_settings; 3286 3287 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp, 3288 void __user *buffer, size_t *lenp, loff_t *ppos) 3289 { 3290 int pos; 3291 struct cdrom_device_info *cdi; 3292 char *info = cdrom_sysctl_settings.info; 3293 3294 if (!*lenp || (*ppos && !write)) { 3295 *lenp = 0; 3296 return 0; 3297 } 3298 3299 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3300 3301 pos += sprintf(info+pos, "\ndrive name:\t"); 3302 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3303 pos += sprintf(info+pos, "\t%s", cdi->name); 3304 3305 pos += sprintf(info+pos, "\ndrive speed:\t"); 3306 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3307 pos += sprintf(info+pos, "\t%d", cdi->speed); 3308 3309 pos += sprintf(info+pos, "\ndrive # of slots:"); 3310 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3311 pos += sprintf(info+pos, "\t%d", cdi->capacity); 3312 3313 pos += sprintf(info+pos, "\nCan close tray:\t"); 3314 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3315 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0); 3316 3317 pos += sprintf(info+pos, "\nCan open tray:\t"); 3318 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3319 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0); 3320 3321 pos += sprintf(info+pos, "\nCan lock tray:\t"); 3322 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3323 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0); 3324 3325 pos += sprintf(info+pos, "\nCan change speed:"); 3326 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3327 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0); 3328 3329 pos += sprintf(info+pos, "\nCan select disk:"); 3330 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3331 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0); 3332 3333 pos += sprintf(info+pos, "\nCan read multisession:"); 3334 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3335 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0); 3336 3337 pos += sprintf(info+pos, "\nCan read MCN:\t"); 3338 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3339 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0); 3340 3341 pos += sprintf(info+pos, "\nReports media changed:"); 3342 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3343 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0); 3344 3345 pos += sprintf(info+pos, "\nCan play audio:\t"); 3346 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3347 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0); 3348 3349 pos += sprintf(info+pos, "\nCan write CD-R:\t"); 3350 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3351 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0); 3352 3353 pos += sprintf(info+pos, "\nCan write CD-RW:"); 3354 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3355 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0); 3356 3357 pos += sprintf(info+pos, "\nCan read DVD:\t"); 3358 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3359 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0); 3360 3361 pos += sprintf(info+pos, "\nCan write DVD-R:"); 3362 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3363 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0); 3364 3365 pos += sprintf(info+pos, "\nCan write DVD-RAM:"); 3366 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3367 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0); 3368 3369 pos += sprintf(info+pos, "\nCan read MRW:\t"); 3370 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3371 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0); 3372 3373 pos += sprintf(info+pos, "\nCan write MRW:\t"); 3374 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3375 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0); 3376 3377 pos += sprintf(info+pos, "\nCan write RAM:\t"); 3378 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3379 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0); 3380 3381 strcpy(info+pos,"\n\n"); 3382 3383 return proc_dostring(ctl, write, filp, buffer, lenp, ppos); 3384 } 3385 3386 /* Unfortunately, per device settings are not implemented through 3387 procfs/sysctl yet. When they are, this will naturally disappear. For now 3388 just update all drives. Later this will become the template on which 3389 new registered drives will be based. */ 3390 static void cdrom_update_settings(void) 3391 { 3392 struct cdrom_device_info *cdi; 3393 3394 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) { 3395 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3396 cdi->options |= CDO_AUTO_CLOSE; 3397 else if (!autoclose) 3398 cdi->options &= ~CDO_AUTO_CLOSE; 3399 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3400 cdi->options |= CDO_AUTO_EJECT; 3401 else if (!autoeject) 3402 cdi->options &= ~CDO_AUTO_EJECT; 3403 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3404 cdi->options |= CDO_LOCK; 3405 else if (!lockdoor) 3406 cdi->options &= ~CDO_LOCK; 3407 if (check_media_type) 3408 cdi->options |= CDO_CHECK_TYPE; 3409 else 3410 cdi->options &= ~CDO_CHECK_TYPE; 3411 } 3412 } 3413 3414 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp, 3415 void __user *buffer, size_t *lenp, loff_t *ppos) 3416 { 3417 int *valp = ctl->data; 3418 int val = *valp; 3419 int ret; 3420 3421 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); 3422 3423 if (write && *valp != val) { 3424 3425 /* we only care for 1 or 0. */ 3426 if (*valp) 3427 *valp = 1; 3428 else 3429 *valp = 0; 3430 3431 switch (ctl->ctl_name) { 3432 case DEV_CDROM_AUTOCLOSE: { 3433 if (valp == &cdrom_sysctl_settings.autoclose) 3434 autoclose = cdrom_sysctl_settings.autoclose; 3435 break; 3436 } 3437 case DEV_CDROM_AUTOEJECT: { 3438 if (valp == &cdrom_sysctl_settings.autoeject) 3439 autoeject = cdrom_sysctl_settings.autoeject; 3440 break; 3441 } 3442 case DEV_CDROM_DEBUG: { 3443 if (valp == &cdrom_sysctl_settings.debug) 3444 debug = cdrom_sysctl_settings.debug; 3445 break; 3446 } 3447 case DEV_CDROM_LOCK: { 3448 if (valp == &cdrom_sysctl_settings.lock) 3449 lockdoor = cdrom_sysctl_settings.lock; 3450 break; 3451 } 3452 case DEV_CDROM_CHECK_MEDIA: { 3453 if (valp == &cdrom_sysctl_settings.check) 3454 check_media_type = cdrom_sysctl_settings.check; 3455 break; 3456 } 3457 } 3458 /* update the option flags according to the changes. we 3459 don't have per device options through sysctl yet, 3460 but we will have and then this will disappear. */ 3461 cdrom_update_settings(); 3462 } 3463 3464 return ret; 3465 } 3466 3467 /* Place files in /proc/sys/dev/cdrom */ 3468 static ctl_table cdrom_table[] = { 3469 { 3470 .ctl_name = DEV_CDROM_INFO, 3471 .procname = "info", 3472 .data = &cdrom_sysctl_settings.info, 3473 .maxlen = CDROM_STR_SIZE, 3474 .mode = 0444, 3475 .proc_handler = &cdrom_sysctl_info, 3476 }, 3477 { 3478 .ctl_name = DEV_CDROM_AUTOCLOSE, 3479 .procname = "autoclose", 3480 .data = &cdrom_sysctl_settings.autoclose, 3481 .maxlen = sizeof(int), 3482 .mode = 0644, 3483 .proc_handler = &cdrom_sysctl_handler, 3484 }, 3485 { 3486 .ctl_name = DEV_CDROM_AUTOEJECT, 3487 .procname = "autoeject", 3488 .data = &cdrom_sysctl_settings.autoeject, 3489 .maxlen = sizeof(int), 3490 .mode = 0644, 3491 .proc_handler = &cdrom_sysctl_handler, 3492 }, 3493 { 3494 .ctl_name = DEV_CDROM_DEBUG, 3495 .procname = "debug", 3496 .data = &cdrom_sysctl_settings.debug, 3497 .maxlen = sizeof(int), 3498 .mode = 0644, 3499 .proc_handler = &cdrom_sysctl_handler, 3500 }, 3501 { 3502 .ctl_name = DEV_CDROM_LOCK, 3503 .procname = "lock", 3504 .data = &cdrom_sysctl_settings.lock, 3505 .maxlen = sizeof(int), 3506 .mode = 0644, 3507 .proc_handler = &cdrom_sysctl_handler, 3508 }, 3509 { 3510 .ctl_name = DEV_CDROM_CHECK_MEDIA, 3511 .procname = "check_media", 3512 .data = &cdrom_sysctl_settings.check, 3513 .maxlen = sizeof(int), 3514 .mode = 0644, 3515 .proc_handler = &cdrom_sysctl_handler 3516 }, 3517 { .ctl_name = 0 } 3518 }; 3519 3520 static ctl_table cdrom_cdrom_table[] = { 3521 { 3522 .ctl_name = DEV_CDROM, 3523 .procname = "cdrom", 3524 .maxlen = 0, 3525 .mode = 0555, 3526 .child = cdrom_table, 3527 }, 3528 { .ctl_name = 0 } 3529 }; 3530 3531 /* Make sure that /proc/sys/dev is there */ 3532 static ctl_table cdrom_root_table[] = { 3533 { 3534 .ctl_name = CTL_DEV, 3535 .procname = "dev", 3536 .maxlen = 0, 3537 .mode = 0555, 3538 .child = cdrom_cdrom_table, 3539 }, 3540 { .ctl_name = 0 } 3541 }; 3542 static struct ctl_table_header *cdrom_sysctl_header; 3543 3544 static void cdrom_sysctl_register(void) 3545 { 3546 static int initialized; 3547 3548 if (initialized == 1) 3549 return; 3550 3551 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table, 1); 3552 if (cdrom_root_table->ctl_name && cdrom_root_table->child->de) 3553 cdrom_root_table->child->de->owner = THIS_MODULE; 3554 3555 /* set the defaults */ 3556 cdrom_sysctl_settings.autoclose = autoclose; 3557 cdrom_sysctl_settings.autoeject = autoeject; 3558 cdrom_sysctl_settings.debug = debug; 3559 cdrom_sysctl_settings.lock = lockdoor; 3560 cdrom_sysctl_settings.check = check_media_type; 3561 3562 initialized = 1; 3563 } 3564 3565 static void cdrom_sysctl_unregister(void) 3566 { 3567 if (cdrom_sysctl_header) 3568 unregister_sysctl_table(cdrom_sysctl_header); 3569 } 3570 3571 #endif /* CONFIG_SYSCTL */ 3572 3573 static int __init cdrom_init(void) 3574 { 3575 #ifdef CONFIG_SYSCTL 3576 cdrom_sysctl_register(); 3577 #endif 3578 return 0; 3579 } 3580 3581 static void __exit cdrom_exit(void) 3582 { 3583 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n"); 3584 #ifdef CONFIG_SYSCTL 3585 cdrom_sysctl_unregister(); 3586 #endif 3587 } 3588 3589 module_init(cdrom_init); 3590 module_exit(cdrom_exit); 3591 MODULE_LICENSE("GPL"); 3592