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/config.h> 267 #include <linux/module.h> 268 #include <linux/fs.h> 269 #include <linux/buffer_head.h> 270 #include <linux/major.h> 271 #include <linux/types.h> 272 #include <linux/errno.h> 273 #include <linux/kernel.h> 274 #include <linux/mm.h> 275 #include <linux/slab.h> 276 #include <linux/cdrom.h> 277 #include <linux/sysctl.h> 278 #include <linux/proc_fs.h> 279 #include <linux/blkpg.h> 280 #include <linux/init.h> 281 #include <linux/fcntl.h> 282 #include <linux/blkdev.h> 283 #include <linux/times.h> 284 285 #include <asm/uaccess.h> 286 287 /* used to tell the module to turn on full debugging messages */ 288 static int debug; 289 /* used to keep tray locked at all times */ 290 static int keeplocked; 291 /* default compatibility mode */ 292 static int autoclose=1; 293 static int autoeject; 294 static int lockdoor = 1; 295 /* will we ever get to use this... sigh. */ 296 static int check_media_type; 297 /* automatically restart mrw format */ 298 static int mrw_format_restart = 1; 299 module_param(debug, bool, 0); 300 module_param(autoclose, bool, 0); 301 module_param(autoeject, bool, 0); 302 module_param(lockdoor, bool, 0); 303 module_param(check_media_type, bool, 0); 304 module_param(mrw_format_restart, bool, 0); 305 306 static DEFINE_SPINLOCK(cdrom_lock); 307 308 static const char *mrw_format_status[] = { 309 "not mrw", 310 "bgformat inactive", 311 "bgformat active", 312 "mrw complete", 313 }; 314 315 static const char *mrw_address_space[] = { "DMA", "GAA" }; 316 317 #if (ERRLOGMASK!=CD_NOTHING) 318 #define cdinfo(type, fmt, args...) \ 319 if ((ERRLOGMASK & type) || debug==1 ) \ 320 printk(KERN_INFO "cdrom: " fmt, ## args) 321 #else 322 #define cdinfo(type, fmt, args...) 323 #endif 324 325 /* These are used to simplify getting data in from and back to user land */ 326 #define IOCTL_IN(arg, type, in) \ 327 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \ 328 return -EFAULT; 329 330 #define IOCTL_OUT(arg, type, out) \ 331 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \ 332 return -EFAULT; 333 334 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 335 a lot of places. This macro makes the code more clear. */ 336 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 337 338 /* used in the audio ioctls */ 339 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret 340 341 /* Not-exported routines. */ 342 static int open_for_data(struct cdrom_device_info * cdi); 343 static int check_for_audio_disc(struct cdrom_device_info * cdi, 344 struct cdrom_device_ops * cdo); 345 static void sanitize_format(union cdrom_addr *addr, 346 u_char * curr, u_char requested); 347 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 348 unsigned long arg); 349 350 int cdrom_get_last_written(struct cdrom_device_info *, long *); 351 static int cdrom_get_next_writable(struct cdrom_device_info *, long *); 352 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*); 353 354 static int cdrom_mrw_exit(struct cdrom_device_info *cdi); 355 356 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); 357 358 #ifdef CONFIG_SYSCTL 359 static void cdrom_sysctl_register(void); 360 #endif /* CONFIG_SYSCTL */ 361 static struct cdrom_device_info *topCdromPtr; 362 363 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 364 struct packet_command *cgc) 365 { 366 if (cgc->sense) { 367 cgc->sense->sense_key = 0x05; 368 cgc->sense->asc = 0x20; 369 cgc->sense->ascq = 0x00; 370 } 371 372 cgc->stat = -EIO; 373 return -EIO; 374 } 375 376 /* This macro makes sure we don't have to check on cdrom_device_ops 377 * existence in the run-time routines below. Change_capability is a 378 * hack to have the capability flags defined const, while we can still 379 * change it here without gcc complaining at every line. 380 */ 381 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits) 382 383 int register_cdrom(struct cdrom_device_info *cdi) 384 { 385 static char banner_printed; 386 struct cdrom_device_ops *cdo = cdi->ops; 387 int *change_capability = (int *)&cdo->capability; /* hack */ 388 389 cdinfo(CD_OPEN, "entering register_cdrom\n"); 390 391 if (cdo->open == NULL || cdo->release == NULL) 392 return -2; 393 if (!banner_printed) { 394 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n"); 395 banner_printed = 1; 396 #ifdef CONFIG_SYSCTL 397 cdrom_sysctl_register(); 398 #endif /* CONFIG_SYSCTL */ 399 } 400 401 ENSURE(drive_status, CDC_DRIVE_STATUS ); 402 ENSURE(media_changed, CDC_MEDIA_CHANGED); 403 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 404 ENSURE(lock_door, CDC_LOCK); 405 ENSURE(select_speed, CDC_SELECT_SPEED); 406 ENSURE(get_last_session, CDC_MULTI_SESSION); 407 ENSURE(get_mcn, CDC_MCN); 408 ENSURE(reset, CDC_RESET); 409 ENSURE(audio_ioctl, CDC_PLAY_AUDIO); 410 ENSURE(generic_packet, CDC_GENERIC_PACKET); 411 cdi->mc_flags = 0; 412 cdo->n_minors = 0; 413 cdi->options = CDO_USE_FFLAGS; 414 415 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY)) 416 cdi->options |= (int) CDO_AUTO_CLOSE; 417 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY)) 418 cdi->options |= (int) CDO_AUTO_EJECT; 419 if (lockdoor==1) 420 cdi->options |= (int) CDO_LOCK; 421 if (check_media_type==1) 422 cdi->options |= (int) CDO_CHECK_TYPE; 423 424 if (CDROM_CAN(CDC_MRW_W)) 425 cdi->exit = cdrom_mrw_exit; 426 427 if (cdi->disk) 428 cdi->cdda_method = CDDA_BPC_FULL; 429 else 430 cdi->cdda_method = CDDA_OLD; 431 432 if (!cdo->generic_packet) 433 cdo->generic_packet = cdrom_dummy_generic_packet; 434 435 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 436 spin_lock(&cdrom_lock); 437 cdi->next = topCdromPtr; 438 topCdromPtr = cdi; 439 spin_unlock(&cdrom_lock); 440 return 0; 441 } 442 #undef ENSURE 443 444 int unregister_cdrom(struct cdrom_device_info *unreg) 445 { 446 struct cdrom_device_info *cdi, *prev; 447 cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 448 449 prev = NULL; 450 spin_lock(&cdrom_lock); 451 cdi = topCdromPtr; 452 while (cdi && cdi != unreg) { 453 prev = cdi; 454 cdi = cdi->next; 455 } 456 457 if (cdi == NULL) { 458 spin_unlock(&cdrom_lock); 459 return -2; 460 } 461 if (prev) 462 prev->next = cdi->next; 463 else 464 topCdromPtr = cdi->next; 465 466 spin_unlock(&cdrom_lock); 467 468 if (cdi->exit) 469 cdi->exit(cdi); 470 471 cdi->ops->n_minors--; 472 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 473 return 0; 474 } 475 476 int cdrom_get_media_event(struct cdrom_device_info *cdi, 477 struct media_event_desc *med) 478 { 479 struct packet_command cgc; 480 unsigned char buffer[8]; 481 struct event_header *eh = (struct event_header *) buffer; 482 483 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 484 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 485 cgc.cmd[1] = 1; /* IMMED */ 486 cgc.cmd[4] = 1 << 4; /* media event */ 487 cgc.cmd[8] = sizeof(buffer); 488 cgc.quiet = 1; 489 490 if (cdi->ops->generic_packet(cdi, &cgc)) 491 return 1; 492 493 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 494 return 1; 495 496 if (eh->nea || eh->notification_class != 0x4) 497 return 1; 498 499 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 500 return 0; 501 } 502 503 /* 504 * the first prototypes used 0x2c as the page code for the mrw mode page, 505 * subsequently this was changed to 0x03. probe the one used by this drive 506 */ 507 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 508 { 509 struct packet_command cgc; 510 char buffer[16]; 511 512 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 513 514 cgc.timeout = HZ; 515 cgc.quiet = 1; 516 517 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 518 cdi->mrw_mode_page = MRW_MODE_PC; 519 return 0; 520 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 521 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 522 return 0; 523 } 524 525 return 1; 526 } 527 528 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 529 { 530 struct packet_command cgc; 531 struct mrw_feature_desc *mfd; 532 unsigned char buffer[16]; 533 int ret; 534 535 *write = 0; 536 537 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 538 539 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 540 cgc.cmd[3] = CDF_MRW; 541 cgc.cmd[8] = sizeof(buffer); 542 cgc.quiet = 1; 543 544 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 545 return ret; 546 547 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 548 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 549 return 1; 550 *write = mfd->write; 551 552 if ((ret = cdrom_mrw_probe_pc(cdi))) { 553 *write = 0; 554 return ret; 555 } 556 557 return 0; 558 } 559 560 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 561 { 562 struct packet_command cgc; 563 unsigned char buffer[12]; 564 int ret; 565 566 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : ""); 567 568 /* 569 * FmtData bit set (bit 4), format type is 1 570 */ 571 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 572 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 573 cgc.cmd[1] = (1 << 4) | 1; 574 575 cgc.timeout = 5 * 60 * HZ; 576 577 /* 578 * 4 byte format list header, 8 byte format list descriptor 579 */ 580 buffer[1] = 1 << 1; 581 buffer[3] = 8; 582 583 /* 584 * nr_blocks field 585 */ 586 buffer[4] = 0xff; 587 buffer[5] = 0xff; 588 buffer[6] = 0xff; 589 buffer[7] = 0xff; 590 591 buffer[8] = 0x24 << 2; 592 buffer[11] = cont; 593 594 ret = cdi->ops->generic_packet(cdi, &cgc); 595 if (ret) 596 printk(KERN_INFO "cdrom: bgformat failed\n"); 597 598 return ret; 599 } 600 601 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 602 { 603 struct packet_command cgc; 604 605 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 606 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 607 608 /* 609 * Session = 1, Track = 0 610 */ 611 cgc.cmd[1] = !!immed; 612 cgc.cmd[2] = 1 << 1; 613 614 cgc.timeout = 5 * 60 * HZ; 615 616 return cdi->ops->generic_packet(cdi, &cgc); 617 } 618 619 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 620 { 621 struct packet_command cgc; 622 623 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 624 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 625 626 cgc.timeout = 5 * 60 * HZ; 627 628 return cdi->ops->generic_packet(cdi, &cgc); 629 } 630 631 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 632 { 633 disc_information di; 634 int ret; 635 636 ret = cdrom_get_disc_info(cdi, &di); 637 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 638 return 1; 639 640 ret = 0; 641 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 642 printk(KERN_INFO "cdrom: issuing MRW back ground " 643 "format suspend\n"); 644 ret = cdrom_mrw_bgformat_susp(cdi, 0); 645 } 646 647 if (!ret && cdi->media_written) 648 ret = cdrom_flush_cache(cdi); 649 650 return ret; 651 } 652 653 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 654 { 655 struct packet_command cgc; 656 struct mode_page_header *mph; 657 char buffer[16]; 658 int ret, offset, size; 659 660 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 661 662 cgc.buffer = buffer; 663 cgc.buflen = sizeof(buffer); 664 665 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0))) 666 return ret; 667 668 mph = (struct mode_page_header *) buffer; 669 offset = be16_to_cpu(mph->desc_length); 670 size = be16_to_cpu(mph->mode_data_length) + 2; 671 672 buffer[offset + 3] = space; 673 cgc.buflen = size; 674 675 if ((ret = cdrom_mode_select(cdi, &cgc))) 676 return ret; 677 678 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]); 679 return 0; 680 } 681 682 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 683 struct rwrt_feature_desc *rfd) 684 { 685 struct packet_command cgc; 686 char buffer[24]; 687 int ret; 688 689 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 690 691 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 692 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 693 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 694 cgc.quiet = 1; 695 696 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 697 return ret; 698 699 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 700 return 0; 701 } 702 703 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 704 { 705 struct packet_command cgc; 706 char buffer[16]; 707 __u16 *feature_code; 708 int ret; 709 710 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 711 712 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 713 cgc.cmd[3] = CDF_HWDM; 714 cgc.cmd[8] = sizeof(buffer); 715 cgc.quiet = 1; 716 717 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 718 return ret; 719 720 feature_code = (__u16 *) &buffer[sizeof(struct feature_header)]; 721 if (be16_to_cpu(*feature_code) == CDF_HWDM) 722 return 0; 723 724 return 1; 725 } 726 727 728 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 729 { 730 struct rwrt_feature_desc rfd; 731 int ret; 732 733 *write = 0; 734 735 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 736 return ret; 737 738 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 739 *write = 1; 740 741 return 0; 742 } 743 744 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 745 { 746 disc_information di; 747 int ret; 748 749 ret = cdrom_get_disc_info(cdi, &di); 750 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 751 return -1; 752 753 return di.erasable; 754 } 755 756 /* 757 * FIXME: check RO bit 758 */ 759 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 760 { 761 int ret = cdrom_media_erasable(cdi); 762 763 /* 764 * allow writable open if media info read worked and media is 765 * erasable, _or_ if it fails since not all drives support it 766 */ 767 if (!ret) 768 return 1; 769 770 return 0; 771 } 772 773 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 774 { 775 disc_information di; 776 int ret; 777 778 /* 779 * always reset to DMA lba space on open 780 */ 781 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 782 printk(KERN_ERR "cdrom: failed setting lba address space\n"); 783 return 1; 784 } 785 786 ret = cdrom_get_disc_info(cdi, &di); 787 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 788 return 1; 789 790 if (!di.erasable) 791 return 1; 792 793 /* 794 * mrw_status 795 * 0 - not MRW formatted 796 * 1 - MRW bgformat started, but not running or complete 797 * 2 - MRW bgformat in progress 798 * 3 - MRW formatting complete 799 */ 800 ret = 0; 801 printk(KERN_INFO "cdrom open: mrw_status '%s'\n", 802 mrw_format_status[di.mrw_status]); 803 if (!di.mrw_status) 804 ret = 1; 805 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 806 mrw_format_restart) 807 ret = cdrom_mrw_bgformat(cdi, 1); 808 809 return ret; 810 } 811 812 static int mo_open_write(struct cdrom_device_info *cdi) 813 { 814 struct packet_command cgc; 815 char buffer[255]; 816 int ret; 817 818 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 819 cgc.quiet = 1; 820 821 /* 822 * obtain write protect information as per 823 * drivers/scsi/sd.c:sd_read_write_protect_flag 824 */ 825 826 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 827 if (ret) 828 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 829 if (ret) { 830 cgc.buflen = 255; 831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 832 } 833 834 /* drive gave us no info, let the user go ahead */ 835 if (ret) 836 return 0; 837 838 return buffer[3] & 0x80; 839 } 840 841 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 842 { 843 struct rwrt_feature_desc rfd; 844 int ret; 845 846 if ((ret = cdrom_has_defect_mgt(cdi))) 847 return ret; 848 849 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 850 return ret; 851 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 852 ret = !rfd.curr; 853 854 cdinfo(CD_OPEN, "can open for random write\n"); 855 return ret; 856 } 857 858 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 859 { 860 struct packet_command cgc; 861 char buffer[32]; 862 int ret, mmc3_profile; 863 864 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 865 866 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 867 cgc.cmd[1] = 0; 868 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 869 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 870 cgc.quiet = 1; 871 872 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 873 mmc3_profile = 0xffff; 874 else 875 mmc3_profile = (buffer[6] << 8) | buffer[7]; 876 877 cdi->mmc3_profile = mmc3_profile; 878 } 879 880 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 881 { 882 switch (cdi->mmc3_profile) { 883 case 0x12: /* DVD-RAM */ 884 case 0x1A: /* DVD+RW */ 885 return 0; 886 default: 887 return 1; 888 } 889 } 890 891 /* 892 * returns 0 for ok to open write, non-0 to disallow 893 */ 894 static int cdrom_open_write(struct cdrom_device_info *cdi) 895 { 896 int mrw, mrw_write, ram_write; 897 int ret = 1; 898 899 mrw = 0; 900 if (!cdrom_is_mrw(cdi, &mrw_write)) 901 mrw = 1; 902 903 if (CDROM_CAN(CDC_MO_DRIVE)) 904 ram_write = 1; 905 else 906 (void) cdrom_is_random_writable(cdi, &ram_write); 907 908 if (mrw) 909 cdi->mask &= ~CDC_MRW; 910 else 911 cdi->mask |= CDC_MRW; 912 913 if (mrw_write) 914 cdi->mask &= ~CDC_MRW_W; 915 else 916 cdi->mask |= CDC_MRW_W; 917 918 if (ram_write) 919 cdi->mask &= ~CDC_RAM; 920 else 921 cdi->mask |= CDC_RAM; 922 923 if (CDROM_CAN(CDC_MRW_W)) 924 ret = cdrom_mrw_open_write(cdi); 925 else if (CDROM_CAN(CDC_DVD_RAM)) 926 ret = cdrom_dvdram_open_write(cdi); 927 else if (CDROM_CAN(CDC_RAM) && 928 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 929 ret = cdrom_ram_open_write(cdi); 930 else if (CDROM_CAN(CDC_MO_DRIVE)) 931 ret = mo_open_write(cdi); 932 else if (!cdrom_is_dvd_rw(cdi)) 933 ret = 0; 934 935 return ret; 936 } 937 938 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 939 { 940 struct packet_command cgc; 941 942 if (cdi->mmc3_profile != 0x1a) { 943 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 944 return; 945 } 946 947 if (!cdi->media_written) { 948 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 949 return; 950 } 951 952 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n", 953 cdi->name); 954 955 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 956 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 957 cgc.timeout = 30*HZ; 958 cdi->ops->generic_packet(cdi, &cgc); 959 960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 961 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 962 cgc.timeout = 3000*HZ; 963 cgc.quiet = 1; 964 cdi->ops->generic_packet(cdi, &cgc); 965 966 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 967 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 968 cgc.cmd[2] = 2; /* Close session */ 969 cgc.quiet = 1; 970 cgc.timeout = 3000*HZ; 971 cdi->ops->generic_packet(cdi, &cgc); 972 973 cdi->media_written = 0; 974 } 975 976 static int cdrom_close_write(struct cdrom_device_info *cdi) 977 { 978 #if 0 979 return cdrom_flush_cache(cdi); 980 #else 981 return 0; 982 #endif 983 } 984 985 /* We use the open-option O_NONBLOCK to indicate that the 986 * purpose of opening is only for subsequent ioctl() calls; no device 987 * integrity checks are performed. 988 * 989 * We hope that all cd-player programs will adopt this convention. It 990 * is in their own interest: device control becomes a lot easier 991 * this way. 992 */ 993 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 994 { 995 int ret; 996 997 cdinfo(CD_OPEN, "entering cdrom_open\n"); 998 999 /* if this was a O_NONBLOCK open and we should honor the flags, 1000 * do a quick open without drive/disc integrity checks. */ 1001 cdi->use_count++; 1002 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) { 1003 ret = cdi->ops->open(cdi, 1); 1004 } else { 1005 ret = open_for_data(cdi); 1006 if (ret) 1007 goto err; 1008 cdrom_mmc3_profile(cdi); 1009 if (fp->f_mode & FMODE_WRITE) { 1010 ret = -EROFS; 1011 if (cdrom_open_write(cdi)) 1012 goto err; 1013 if (!CDROM_CAN(CDC_RAM)) 1014 goto err; 1015 ret = 0; 1016 cdi->media_written = 0; 1017 } 1018 } 1019 1020 if (ret) 1021 goto err; 1022 1023 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1024 cdi->name, cdi->use_count); 1025 /* Do this on open. Don't wait for mount, because they might 1026 not be mounting, but opening with O_NONBLOCK */ 1027 check_disk_change(ip->i_bdev); 1028 return 0; 1029 err: 1030 cdi->use_count--; 1031 return ret; 1032 } 1033 1034 static 1035 int open_for_data(struct cdrom_device_info * cdi) 1036 { 1037 int ret; 1038 struct cdrom_device_ops *cdo = cdi->ops; 1039 tracktype tracks; 1040 cdinfo(CD_OPEN, "entering open_for_data\n"); 1041 /* Check if the driver can report drive status. If it can, we 1042 can do clever things. If it can't, well, we at least tried! */ 1043 if (cdo->drive_status != NULL) { 1044 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1045 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1046 if (ret == CDS_TRAY_OPEN) { 1047 cdinfo(CD_OPEN, "the tray is open...\n"); 1048 /* can/may i close it? */ 1049 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1050 cdi->options & CDO_AUTO_CLOSE) { 1051 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1052 ret=cdo->tray_move(cdi,0); 1053 if (ret) { 1054 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1055 /* Ignore the error from the low 1056 level driver. We don't care why it 1057 couldn't close the tray. We only care 1058 that there is no disc in the drive, 1059 since that is the _REAL_ problem here.*/ 1060 ret=-ENOMEDIUM; 1061 goto clean_up_and_return; 1062 } 1063 } else { 1064 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1065 ret=-ENOMEDIUM; 1066 goto clean_up_and_return; 1067 } 1068 /* Ok, the door should be closed now.. Check again */ 1069 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1070 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1071 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1072 cdinfo(CD_OPEN, "tray might not contain a medium.\n"); 1073 ret=-ENOMEDIUM; 1074 goto clean_up_and_return; 1075 } 1076 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1077 } 1078 /* the door should be closed now, check for the disc */ 1079 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1080 if (ret!=CDS_DISC_OK) { 1081 ret = -ENOMEDIUM; 1082 goto clean_up_and_return; 1083 } 1084 } 1085 cdrom_count_tracks(cdi, &tracks); 1086 if (tracks.error == CDS_NO_DISC) { 1087 cdinfo(CD_OPEN, "bummer. no disc.\n"); 1088 ret=-ENOMEDIUM; 1089 goto clean_up_and_return; 1090 } 1091 /* CD-Players which don't use O_NONBLOCK, workman 1092 * for example, need bit CDO_CHECK_TYPE cleared! */ 1093 if (tracks.data==0) { 1094 if (cdi->options & CDO_CHECK_TYPE) { 1095 /* give people a warning shot, now that CDO_CHECK_TYPE 1096 is the default case! */ 1097 cdinfo(CD_OPEN, "bummer. wrong media type.\n"); 1098 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1099 (unsigned int)current->pid); 1100 ret=-EMEDIUMTYPE; 1101 goto clean_up_and_return; 1102 } 1103 else { 1104 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n"); 1105 } 1106 } 1107 1108 cdinfo(CD_OPEN, "all seems well, opening the device.\n"); 1109 1110 /* all seems well, we can open the device */ 1111 ret = cdo->open(cdi, 0); /* open for data */ 1112 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret); 1113 /* After all this careful checking, we shouldn't have problems 1114 opening the device, but we don't want the device locked if 1115 this somehow fails... */ 1116 if (ret) { 1117 cdinfo(CD_OPEN, "open device failed.\n"); 1118 goto clean_up_and_return; 1119 } 1120 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1121 cdo->lock_door(cdi, 1); 1122 cdinfo(CD_OPEN, "door locked.\n"); 1123 } 1124 cdinfo(CD_OPEN, "device opened successfully.\n"); 1125 return ret; 1126 1127 /* Something failed. Try to unlock the drive, because some drivers 1128 (notably ide-cd) lock the drive after every command. This produced 1129 a nasty bug where after mount failed, the drive would remain locked! 1130 This ensures that the drive gets unlocked after a mount fails. This 1131 is a goto to avoid bloating the driver with redundant code. */ 1132 clean_up_and_return: 1133 cdinfo(CD_OPEN, "open failed.\n"); 1134 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1135 cdo->lock_door(cdi, 0); 1136 cdinfo(CD_OPEN, "door unlocked.\n"); 1137 } 1138 return ret; 1139 } 1140 1141 /* This code is similar to that in open_for_data. The routine is called 1142 whenever an audio play operation is requested. 1143 */ 1144 int check_for_audio_disc(struct cdrom_device_info * cdi, 1145 struct cdrom_device_ops * cdo) 1146 { 1147 int ret; 1148 tracktype tracks; 1149 cdinfo(CD_OPEN, "entering check_for_audio_disc\n"); 1150 if (!(cdi->options & CDO_CHECK_TYPE)) 1151 return 0; 1152 if (cdo->drive_status != NULL) { 1153 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1154 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1155 if (ret == CDS_TRAY_OPEN) { 1156 cdinfo(CD_OPEN, "the tray is open...\n"); 1157 /* can/may i close it? */ 1158 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1159 cdi->options & CDO_AUTO_CLOSE) { 1160 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1161 ret=cdo->tray_move(cdi,0); 1162 if (ret) { 1163 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1164 /* Ignore the error from the low 1165 level driver. We don't care why it 1166 couldn't close the tray. We only care 1167 that there is no disc in the drive, 1168 since that is the _REAL_ problem here.*/ 1169 return -ENOMEDIUM; 1170 } 1171 } else { 1172 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1173 return -ENOMEDIUM; 1174 } 1175 /* Ok, the door should be closed now.. Check again */ 1176 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1177 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1178 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1179 return -ENOMEDIUM; 1180 } 1181 if (ret!=CDS_DISC_OK) { 1182 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n"); 1183 return -EIO; 1184 } 1185 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1186 } 1187 } 1188 cdrom_count_tracks(cdi, &tracks); 1189 if (tracks.error) 1190 return(tracks.error); 1191 1192 if (tracks.audio==0) 1193 return -EMEDIUMTYPE; 1194 1195 return 0; 1196 } 1197 1198 /* Admittedly, the logic below could be performed in a nicer way. */ 1199 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp) 1200 { 1201 struct cdrom_device_ops *cdo = cdi->ops; 1202 int opened_for_data; 1203 1204 cdinfo(CD_CLOSE, "entering cdrom_release\n"); 1205 1206 if (cdi->use_count > 0) 1207 cdi->use_count--; 1208 if (cdi->use_count == 0) 1209 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name); 1210 if (cdi->use_count == 0) 1211 cdrom_dvd_rw_close_write(cdi); 1212 if (cdi->use_count == 0 && 1213 (cdo->capability & CDC_LOCK) && !keeplocked) { 1214 cdinfo(CD_CLOSE, "Unlocking door!\n"); 1215 cdo->lock_door(cdi, 0); 1216 } 1217 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1218 !(fp && fp->f_flags & O_NONBLOCK); 1219 1220 /* 1221 * flush cache on last write release 1222 */ 1223 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1224 cdrom_close_write(cdi); 1225 1226 cdo->release(cdi); 1227 if (cdi->use_count == 0) { /* last process that closes dev*/ 1228 if (opened_for_data && 1229 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1230 cdo->tray_move(cdi, 1); 1231 } 1232 return 0; 1233 } 1234 1235 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1236 struct cdrom_changer_info *buf) 1237 { 1238 struct packet_command cgc; 1239 struct cdrom_device_ops *cdo = cdi->ops; 1240 int length; 1241 1242 /* 1243 * Sanyo changer isn't spec compliant (doesn't use regular change 1244 * LOAD_UNLOAD command, and it doesn't implement the mech status 1245 * command below 1246 */ 1247 if (cdi->sanyo_slot) { 1248 buf->hdr.nslots = 3; 1249 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1250 for (length = 0; length < 3; length++) { 1251 buf->slots[length].disc_present = 1; 1252 buf->slots[length].change = 0; 1253 } 1254 return 0; 1255 } 1256 1257 length = sizeof(struct cdrom_mechstat_header) + 1258 cdi->capacity * sizeof(struct cdrom_slot); 1259 1260 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1261 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1262 cgc.cmd[8] = (length >> 8) & 0xff; 1263 cgc.cmd[9] = length & 0xff; 1264 return cdo->generic_packet(cdi, &cgc); 1265 } 1266 1267 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1268 { 1269 struct cdrom_changer_info *info; 1270 int ret; 1271 1272 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 1273 if (cdi->sanyo_slot) 1274 return CDS_NO_INFO; 1275 1276 info = kmalloc(sizeof(*info), GFP_KERNEL); 1277 if (!info) 1278 return -ENOMEM; 1279 1280 if ((ret = cdrom_read_mech_status(cdi, info))) 1281 goto out_free; 1282 1283 if (info->slots[slot].disc_present) 1284 ret = CDS_DISC_OK; 1285 else 1286 ret = CDS_NO_DISC; 1287 1288 out_free: 1289 kfree(info); 1290 return ret; 1291 } 1292 1293 /* Return the number of slots for an ATAPI/SCSI cdrom, 1294 * return 1 if not a changer. 1295 */ 1296 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1297 { 1298 int status; 1299 int nslots = 1; 1300 struct cdrom_changer_info *info; 1301 1302 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1303 /* cdrom_read_mech_status requires a valid value for capacity: */ 1304 cdi->capacity = 0; 1305 1306 info = kmalloc(sizeof(*info), GFP_KERNEL); 1307 if (!info) 1308 return -ENOMEM; 1309 1310 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1311 nslots = info->hdr.nslots; 1312 1313 kfree(info); 1314 return nslots; 1315 } 1316 1317 1318 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1319 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1320 { 1321 struct packet_command cgc; 1322 1323 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n"); 1324 if (cdi->sanyo_slot && slot < 0) 1325 return 0; 1326 1327 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1328 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1329 cgc.cmd[4] = 2 + (slot >= 0); 1330 cgc.cmd[8] = slot; 1331 cgc.timeout = 60 * HZ; 1332 1333 /* The Sanyo 3 CD changer uses byte 7 of the 1334 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1335 using the GPCMD_LOAD_UNLOAD opcode. */ 1336 if (cdi->sanyo_slot && -1 < slot) { 1337 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1338 cgc.cmd[7] = slot; 1339 cgc.cmd[4] = cgc.cmd[8] = 0; 1340 cdi->sanyo_slot = slot ? slot : 3; 1341 } 1342 1343 return cdi->ops->generic_packet(cdi, &cgc); 1344 } 1345 1346 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1347 { 1348 struct cdrom_changer_info *info; 1349 int curslot; 1350 int ret; 1351 1352 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n"); 1353 if (!CDROM_CAN(CDC_SELECT_DISC)) 1354 return -EDRIVE_CANT_DO_THIS; 1355 1356 (void) cdi->ops->media_changed(cdi, slot); 1357 1358 if (slot == CDSL_NONE) { 1359 /* set media changed bits, on both queues */ 1360 cdi->mc_flags = 0x3; 1361 return cdrom_load_unload(cdi, -1); 1362 } 1363 1364 info = kmalloc(sizeof(*info), GFP_KERNEL); 1365 if (!info) 1366 return -ENOMEM; 1367 1368 if ((ret = cdrom_read_mech_status(cdi, info))) { 1369 kfree(info); 1370 return ret; 1371 } 1372 1373 curslot = info->hdr.curslot; 1374 kfree(info); 1375 1376 if (cdi->use_count > 1 || keeplocked) { 1377 if (slot == CDSL_CURRENT) { 1378 return curslot; 1379 } else { 1380 return -EBUSY; 1381 } 1382 } 1383 1384 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1385 which is useful if it had been previously unloaded. 1386 Whether it can or not, it returns the current slot. 1387 Similarly, if slot happens to be the current one, we still 1388 try and load it. */ 1389 if (slot == CDSL_CURRENT) 1390 slot = curslot; 1391 1392 /* set media changed bits on both queues */ 1393 cdi->mc_flags = 0x3; 1394 if ((ret = cdrom_load_unload(cdi, slot))) 1395 return ret; 1396 1397 return slot; 1398 } 1399 1400 /* We want to make media_changed accessible to the user through an 1401 * ioctl. The main problem now is that we must double-buffer the 1402 * low-level implementation, to assure that the VFS and the user both 1403 * see a medium change once. 1404 */ 1405 1406 static 1407 int media_changed(struct cdrom_device_info *cdi, int queue) 1408 { 1409 unsigned int mask = (1 << (queue & 1)); 1410 int ret = !!(cdi->mc_flags & mask); 1411 1412 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1413 return ret; 1414 /* changed since last call? */ 1415 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) { 1416 cdi->mc_flags = 0x3; /* set bit on both queues */ 1417 ret |= 1; 1418 cdi->media_written = 0; 1419 } 1420 cdi->mc_flags &= ~mask; /* clear bit */ 1421 return ret; 1422 } 1423 1424 int cdrom_media_changed(struct cdrom_device_info *cdi) 1425 { 1426 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1427 * Returning "0" is always safe (media hasn't been changed). Do that 1428 * if the low-level cdrom driver dosn't support media changed. */ 1429 if (cdi == NULL || cdi->ops->media_changed == NULL) 1430 return 0; 1431 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1432 return 0; 1433 return media_changed(cdi, 0); 1434 } 1435 1436 /* badly broken, I know. Is due for a fixup anytime. */ 1437 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks) 1438 { 1439 struct cdrom_tochdr header; 1440 struct cdrom_tocentry entry; 1441 int ret, i; 1442 tracks->data=0; 1443 tracks->audio=0; 1444 tracks->cdi=0; 1445 tracks->xa=0; 1446 tracks->error=0; 1447 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1448 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1449 tracks->error=CDS_NO_INFO; 1450 return; 1451 } 1452 /* Grab the TOC header so we can see how many tracks there are */ 1453 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) { 1454 if (ret == -ENOMEDIUM) 1455 tracks->error = CDS_NO_DISC; 1456 else 1457 tracks->error = CDS_NO_INFO; 1458 return; 1459 } 1460 /* check what type of tracks are on this disc */ 1461 entry.cdte_format = CDROM_MSF; 1462 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1463 entry.cdte_track = i; 1464 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1465 tracks->error=CDS_NO_INFO; 1466 return; 1467 } 1468 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1469 if (entry.cdte_format == 0x10) 1470 tracks->cdi++; 1471 else if (entry.cdte_format == 0x20) 1472 tracks->xa++; 1473 else 1474 tracks->data++; 1475 } else 1476 tracks->audio++; 1477 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1478 i, entry.cdte_format, entry.cdte_ctrl); 1479 } 1480 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1481 header.cdth_trk1, tracks->audio, tracks->data, 1482 tracks->cdi, tracks->xa); 1483 } 1484 1485 /* Requests to the low-level drivers will /always/ be done in the 1486 following format convention: 1487 1488 CDROM_LBA: all data-related requests. 1489 CDROM_MSF: all audio-related requests. 1490 1491 However, a low-level implementation is allowed to refuse this 1492 request, and return information in its own favorite format. 1493 1494 It doesn't make sense /at all/ to ask for a play_audio in LBA 1495 format, or ask for multi-session info in MSF format. However, for 1496 backward compatibility these format requests will be satisfied, but 1497 the requests to the low-level drivers will be sanitized in the more 1498 meaningful format indicated above. 1499 */ 1500 1501 static 1502 void sanitize_format(union cdrom_addr *addr, 1503 u_char * curr, u_char requested) 1504 { 1505 if (*curr == requested) 1506 return; /* nothing to be done! */ 1507 if (requested == CDROM_LBA) { 1508 addr->lba = (int) addr->msf.frame + 1509 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1510 } else { /* CDROM_MSF */ 1511 int lba = addr->lba; 1512 addr->msf.frame = lba % 75; 1513 lba /= 75; 1514 lba += 2; 1515 addr->msf.second = lba % 60; 1516 addr->msf.minute = lba / 60; 1517 } 1518 *curr = requested; 1519 } 1520 1521 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1522 int type) 1523 { 1524 memset(cgc, 0, sizeof(struct packet_command)); 1525 if (buf) 1526 memset(buf, 0, len); 1527 cgc->buffer = (char *) buf; 1528 cgc->buflen = len; 1529 cgc->data_direction = type; 1530 cgc->timeout = 5*HZ; 1531 } 1532 1533 /* DVD handling */ 1534 1535 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1536 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1537 1538 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1539 { 1540 cgc->cmd[0] = GPCMD_REPORT_KEY; 1541 cgc->cmd[10] = type | (agid << 6); 1542 switch (type) { 1543 case 0: case 8: case 5: { 1544 cgc->buflen = 8; 1545 break; 1546 } 1547 case 1: { 1548 cgc->buflen = 16; 1549 break; 1550 } 1551 case 2: case 4: { 1552 cgc->buflen = 12; 1553 break; 1554 } 1555 } 1556 cgc->cmd[9] = cgc->buflen; 1557 cgc->data_direction = CGC_DATA_READ; 1558 } 1559 1560 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1561 { 1562 cgc->cmd[0] = GPCMD_SEND_KEY; 1563 cgc->cmd[10] = type | (agid << 6); 1564 switch (type) { 1565 case 1: { 1566 cgc->buflen = 16; 1567 break; 1568 } 1569 case 3: { 1570 cgc->buflen = 12; 1571 break; 1572 } 1573 case 6: { 1574 cgc->buflen = 8; 1575 break; 1576 } 1577 } 1578 cgc->cmd[9] = cgc->buflen; 1579 cgc->data_direction = CGC_DATA_WRITE; 1580 } 1581 1582 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1583 { 1584 int ret; 1585 u_char buf[20]; 1586 struct packet_command cgc; 1587 struct cdrom_device_ops *cdo = cdi->ops; 1588 rpc_state_t rpc_state; 1589 1590 memset(buf, 0, sizeof(buf)); 1591 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1592 1593 switch (ai->type) { 1594 /* LU data send */ 1595 case DVD_LU_SEND_AGID: 1596 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1597 cgc.quiet = 1; 1598 setup_report_key(&cgc, ai->lsa.agid, 0); 1599 1600 if ((ret = cdo->generic_packet(cdi, &cgc))) 1601 return ret; 1602 1603 ai->lsa.agid = buf[7] >> 6; 1604 /* Returning data, let host change state */ 1605 break; 1606 1607 case DVD_LU_SEND_KEY1: 1608 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1609 setup_report_key(&cgc, ai->lsk.agid, 2); 1610 1611 if ((ret = cdo->generic_packet(cdi, &cgc))) 1612 return ret; 1613 1614 copy_key(ai->lsk.key, &buf[4]); 1615 /* Returning data, let host change state */ 1616 break; 1617 1618 case DVD_LU_SEND_CHALLENGE: 1619 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1620 setup_report_key(&cgc, ai->lsc.agid, 1); 1621 1622 if ((ret = cdo->generic_packet(cdi, &cgc))) 1623 return ret; 1624 1625 copy_chal(ai->lsc.chal, &buf[4]); 1626 /* Returning data, let host change state */ 1627 break; 1628 1629 /* Post-auth key */ 1630 case DVD_LU_SEND_TITLE_KEY: 1631 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1632 cgc.quiet = 1; 1633 setup_report_key(&cgc, ai->lstk.agid, 4); 1634 cgc.cmd[5] = ai->lstk.lba; 1635 cgc.cmd[4] = ai->lstk.lba >> 8; 1636 cgc.cmd[3] = ai->lstk.lba >> 16; 1637 cgc.cmd[2] = ai->lstk.lba >> 24; 1638 1639 if ((ret = cdo->generic_packet(cdi, &cgc))) 1640 return ret; 1641 1642 ai->lstk.cpm = (buf[4] >> 7) & 1; 1643 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1644 ai->lstk.cgms = (buf[4] >> 4) & 3; 1645 copy_key(ai->lstk.title_key, &buf[5]); 1646 /* Returning data, let host change state */ 1647 break; 1648 1649 case DVD_LU_SEND_ASF: 1650 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1651 setup_report_key(&cgc, ai->lsasf.agid, 5); 1652 1653 if ((ret = cdo->generic_packet(cdi, &cgc))) 1654 return ret; 1655 1656 ai->lsasf.asf = buf[7] & 1; 1657 break; 1658 1659 /* LU data receive (LU changes state) */ 1660 case DVD_HOST_SEND_CHALLENGE: 1661 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1662 setup_send_key(&cgc, ai->hsc.agid, 1); 1663 buf[1] = 0xe; 1664 copy_chal(&buf[4], ai->hsc.chal); 1665 1666 if ((ret = cdo->generic_packet(cdi, &cgc))) 1667 return ret; 1668 1669 ai->type = DVD_LU_SEND_KEY1; 1670 break; 1671 1672 case DVD_HOST_SEND_KEY2: 1673 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1674 setup_send_key(&cgc, ai->hsk.agid, 3); 1675 buf[1] = 0xa; 1676 copy_key(&buf[4], ai->hsk.key); 1677 1678 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1679 ai->type = DVD_AUTH_FAILURE; 1680 return ret; 1681 } 1682 ai->type = DVD_AUTH_ESTABLISHED; 1683 break; 1684 1685 /* Misc */ 1686 case DVD_INVALIDATE_AGID: 1687 cgc.quiet = 1; 1688 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1689 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1690 if ((ret = cdo->generic_packet(cdi, &cgc))) 1691 return ret; 1692 break; 1693 1694 /* Get region settings */ 1695 case DVD_LU_SEND_RPC_STATE: 1696 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1697 setup_report_key(&cgc, 0, 8); 1698 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1699 cgc.buffer = (char *) &rpc_state; 1700 1701 if ((ret = cdo->generic_packet(cdi, &cgc))) 1702 return ret; 1703 1704 ai->lrpcs.type = rpc_state.type_code; 1705 ai->lrpcs.vra = rpc_state.vra; 1706 ai->lrpcs.ucca = rpc_state.ucca; 1707 ai->lrpcs.region_mask = rpc_state.region_mask; 1708 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1709 break; 1710 1711 /* Set region settings */ 1712 case DVD_HOST_SEND_RPC_STATE: 1713 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1714 setup_send_key(&cgc, 0, 6); 1715 buf[1] = 6; 1716 buf[4] = ai->hrpcs.pdrc; 1717 1718 if ((ret = cdo->generic_packet(cdi, &cgc))) 1719 return ret; 1720 break; 1721 1722 default: 1723 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1724 return -ENOTTY; 1725 } 1726 1727 return 0; 1728 } 1729 1730 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s) 1731 { 1732 unsigned char buf[21], *base; 1733 struct dvd_layer *layer; 1734 struct packet_command cgc; 1735 struct cdrom_device_ops *cdo = cdi->ops; 1736 int ret, layer_num = s->physical.layer_num; 1737 1738 if (layer_num >= DVD_LAYERS) 1739 return -EINVAL; 1740 1741 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1742 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1743 cgc.cmd[6] = layer_num; 1744 cgc.cmd[7] = s->type; 1745 cgc.cmd[9] = cgc.buflen & 0xff; 1746 1747 /* 1748 * refrain from reporting errors on non-existing layers (mainly) 1749 */ 1750 cgc.quiet = 1; 1751 1752 if ((ret = cdo->generic_packet(cdi, &cgc))) 1753 return ret; 1754 1755 base = &buf[4]; 1756 layer = &s->physical.layer[layer_num]; 1757 1758 /* 1759 * place the data... really ugly, but at least we won't have to 1760 * worry about endianess in userspace. 1761 */ 1762 memset(layer, 0, sizeof(*layer)); 1763 layer->book_version = base[0] & 0xf; 1764 layer->book_type = base[0] >> 4; 1765 layer->min_rate = base[1] & 0xf; 1766 layer->disc_size = base[1] >> 4; 1767 layer->layer_type = base[2] & 0xf; 1768 layer->track_path = (base[2] >> 4) & 1; 1769 layer->nlayers = (base[2] >> 5) & 3; 1770 layer->track_density = base[3] & 0xf; 1771 layer->linear_density = base[3] >> 4; 1772 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1773 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1774 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1775 layer->bca = base[16] >> 7; 1776 1777 return 0; 1778 } 1779 1780 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s) 1781 { 1782 int ret; 1783 u_char buf[8]; 1784 struct packet_command cgc; 1785 struct cdrom_device_ops *cdo = cdi->ops; 1786 1787 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1788 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1789 cgc.cmd[6] = s->copyright.layer_num; 1790 cgc.cmd[7] = s->type; 1791 cgc.cmd[8] = cgc.buflen >> 8; 1792 cgc.cmd[9] = cgc.buflen & 0xff; 1793 1794 if ((ret = cdo->generic_packet(cdi, &cgc))) 1795 return ret; 1796 1797 s->copyright.cpst = buf[4]; 1798 s->copyright.rmi = buf[5]; 1799 1800 return 0; 1801 } 1802 1803 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s) 1804 { 1805 int ret, size; 1806 u_char *buf; 1807 struct packet_command cgc; 1808 struct cdrom_device_ops *cdo = cdi->ops; 1809 1810 size = sizeof(s->disckey.value) + 4; 1811 1812 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL) 1813 return -ENOMEM; 1814 1815 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1816 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1817 cgc.cmd[7] = s->type; 1818 cgc.cmd[8] = size >> 8; 1819 cgc.cmd[9] = size & 0xff; 1820 cgc.cmd[10] = s->disckey.agid << 6; 1821 1822 if (!(ret = cdo->generic_packet(cdi, &cgc))) 1823 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1824 1825 kfree(buf); 1826 return ret; 1827 } 1828 1829 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s) 1830 { 1831 int ret; 1832 u_char buf[4 + 188]; 1833 struct packet_command cgc; 1834 struct cdrom_device_ops *cdo = cdi->ops; 1835 1836 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1837 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1838 cgc.cmd[7] = s->type; 1839 cgc.cmd[9] = cgc.buflen = 0xff; 1840 1841 if ((ret = cdo->generic_packet(cdi, &cgc))) 1842 return ret; 1843 1844 s->bca.len = buf[0] << 8 | buf[1]; 1845 if (s->bca.len < 12 || s->bca.len > 188) { 1846 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len); 1847 return -EIO; 1848 } 1849 memcpy(s->bca.value, &buf[4], s->bca.len); 1850 1851 return 0; 1852 } 1853 1854 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s) 1855 { 1856 int ret = 0, size; 1857 u_char *buf; 1858 struct packet_command cgc; 1859 struct cdrom_device_ops *cdo = cdi->ops; 1860 1861 size = sizeof(s->manufact.value) + 4; 1862 1863 if ((buf = (u_char *) kmalloc(size, GFP_KERNEL)) == NULL) 1864 return -ENOMEM; 1865 1866 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1867 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1868 cgc.cmd[7] = s->type; 1869 cgc.cmd[8] = size >> 8; 1870 cgc.cmd[9] = size & 0xff; 1871 1872 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1873 kfree(buf); 1874 return ret; 1875 } 1876 1877 s->manufact.len = buf[0] << 8 | buf[1]; 1878 if (s->manufact.len < 0 || s->manufact.len > 2048) { 1879 cdinfo(CD_WARNING, "Received invalid manufacture info length" 1880 " (%d)\n", s->manufact.len); 1881 ret = -EIO; 1882 } else { 1883 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1884 } 1885 1886 kfree(buf); 1887 return ret; 1888 } 1889 1890 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s) 1891 { 1892 switch (s->type) { 1893 case DVD_STRUCT_PHYSICAL: 1894 return dvd_read_physical(cdi, s); 1895 1896 case DVD_STRUCT_COPYRIGHT: 1897 return dvd_read_copyright(cdi, s); 1898 1899 case DVD_STRUCT_DISCKEY: 1900 return dvd_read_disckey(cdi, s); 1901 1902 case DVD_STRUCT_BCA: 1903 return dvd_read_bca(cdi, s); 1904 1905 case DVD_STRUCT_MANUFACT: 1906 return dvd_read_manufact(cdi, s); 1907 1908 default: 1909 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1910 s->type); 1911 return -EINVAL; 1912 } 1913 } 1914 1915 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1916 struct packet_command *cgc, 1917 int page_code, int page_control) 1918 { 1919 struct cdrom_device_ops *cdo = cdi->ops; 1920 1921 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1922 1923 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1924 cgc->cmd[2] = page_code | (page_control << 6); 1925 cgc->cmd[7] = cgc->buflen >> 8; 1926 cgc->cmd[8] = cgc->buflen & 0xff; 1927 cgc->data_direction = CGC_DATA_READ; 1928 return cdo->generic_packet(cdi, cgc); 1929 } 1930 1931 int cdrom_mode_select(struct cdrom_device_info *cdi, 1932 struct packet_command *cgc) 1933 { 1934 struct cdrom_device_ops *cdo = cdi->ops; 1935 1936 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1937 memset(cgc->buffer, 0, 2); 1938 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 1939 cgc->cmd[1] = 0x10; /* PF */ 1940 cgc->cmd[7] = cgc->buflen >> 8; 1941 cgc->cmd[8] = cgc->buflen & 0xff; 1942 cgc->data_direction = CGC_DATA_WRITE; 1943 return cdo->generic_packet(cdi, cgc); 1944 } 1945 1946 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 1947 struct cdrom_subchnl *subchnl, int mcn) 1948 { 1949 struct cdrom_device_ops *cdo = cdi->ops; 1950 struct packet_command cgc; 1951 char buffer[32]; 1952 int ret; 1953 1954 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 1955 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 1956 cgc.cmd[1] = 2; /* MSF addressing */ 1957 cgc.cmd[2] = 0x40; /* request subQ data */ 1958 cgc.cmd[3] = mcn ? 2 : 1; 1959 cgc.cmd[8] = 16; 1960 1961 if ((ret = cdo->generic_packet(cdi, &cgc))) 1962 return ret; 1963 1964 subchnl->cdsc_audiostatus = cgc.buffer[1]; 1965 subchnl->cdsc_format = CDROM_MSF; 1966 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 1967 subchnl->cdsc_trk = cgc.buffer[6]; 1968 subchnl->cdsc_ind = cgc.buffer[7]; 1969 1970 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 1971 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 1972 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 1973 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 1974 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 1975 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 1976 1977 return 0; 1978 } 1979 1980 /* 1981 * Specific READ_10 interface 1982 */ 1983 static int cdrom_read_cd(struct cdrom_device_info *cdi, 1984 struct packet_command *cgc, int lba, 1985 int blocksize, int nblocks) 1986 { 1987 struct cdrom_device_ops *cdo = cdi->ops; 1988 1989 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 1990 cgc->cmd[0] = GPCMD_READ_10; 1991 cgc->cmd[2] = (lba >> 24) & 0xff; 1992 cgc->cmd[3] = (lba >> 16) & 0xff; 1993 cgc->cmd[4] = (lba >> 8) & 0xff; 1994 cgc->cmd[5] = lba & 0xff; 1995 cgc->cmd[6] = (nblocks >> 16) & 0xff; 1996 cgc->cmd[7] = (nblocks >> 8) & 0xff; 1997 cgc->cmd[8] = nblocks & 0xff; 1998 cgc->buflen = blocksize * nblocks; 1999 return cdo->generic_packet(cdi, cgc); 2000 } 2001 2002 /* very generic interface for reading the various types of blocks */ 2003 static int cdrom_read_block(struct cdrom_device_info *cdi, 2004 struct packet_command *cgc, 2005 int lba, int nblocks, int format, int blksize) 2006 { 2007 struct cdrom_device_ops *cdo = cdi->ops; 2008 2009 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2010 cgc->cmd[0] = GPCMD_READ_CD; 2011 /* expected sector size - cdda,mode1,etc. */ 2012 cgc->cmd[1] = format << 2; 2013 /* starting address */ 2014 cgc->cmd[2] = (lba >> 24) & 0xff; 2015 cgc->cmd[3] = (lba >> 16) & 0xff; 2016 cgc->cmd[4] = (lba >> 8) & 0xff; 2017 cgc->cmd[5] = lba & 0xff; 2018 /* number of blocks */ 2019 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2020 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2021 cgc->cmd[8] = nblocks & 0xff; 2022 cgc->buflen = blksize * nblocks; 2023 2024 /* set the header info returned */ 2025 switch (blksize) { 2026 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2027 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2028 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2029 default : cgc->cmd[9] = 0x10; 2030 } 2031 2032 return cdo->generic_packet(cdi, cgc); 2033 } 2034 2035 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2036 int lba, int nframes) 2037 { 2038 struct packet_command cgc; 2039 int ret = 0; 2040 int nr; 2041 2042 cdi->last_sense = 0; 2043 2044 memset(&cgc, 0, sizeof(cgc)); 2045 2046 /* 2047 * start with will ra.nframes size, back down if alloc fails 2048 */ 2049 nr = nframes; 2050 do { 2051 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2052 if (cgc.buffer) 2053 break; 2054 2055 nr >>= 1; 2056 } while (nr); 2057 2058 if (!nr) 2059 return -ENOMEM; 2060 2061 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) { 2062 ret = -EFAULT; 2063 goto out; 2064 } 2065 2066 cgc.data_direction = CGC_DATA_READ; 2067 while (nframes > 0) { 2068 if (nr > nframes) 2069 nr = nframes; 2070 2071 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2072 if (ret) 2073 break; 2074 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2075 ret = -EFAULT; 2076 break; 2077 } 2078 ubuf += CD_FRAMESIZE_RAW * nr; 2079 nframes -= nr; 2080 lba += nr; 2081 } 2082 out: 2083 kfree(cgc.buffer); 2084 return ret; 2085 } 2086 2087 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2088 int lba, int nframes) 2089 { 2090 request_queue_t *q = cdi->disk->queue; 2091 struct request *rq; 2092 struct bio *bio; 2093 unsigned int len; 2094 int nr, ret = 0; 2095 2096 if (!q) 2097 return -ENXIO; 2098 2099 rq = blk_get_request(q, READ, GFP_KERNEL); 2100 if (!rq) 2101 return -ENOMEM; 2102 2103 cdi->last_sense = 0; 2104 2105 while (nframes) { 2106 nr = nframes; 2107 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2108 nr = 1; 2109 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9)) 2110 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW; 2111 2112 len = nr * CD_FRAMESIZE_RAW; 2113 2114 ret = blk_rq_map_user(q, rq, ubuf, len); 2115 if (ret) 2116 break; 2117 2118 memset(rq->cmd, 0, sizeof(rq->cmd)); 2119 rq->cmd[0] = GPCMD_READ_CD; 2120 rq->cmd[1] = 1 << 2; 2121 rq->cmd[2] = (lba >> 24) & 0xff; 2122 rq->cmd[3] = (lba >> 16) & 0xff; 2123 rq->cmd[4] = (lba >> 8) & 0xff; 2124 rq->cmd[5] = lba & 0xff; 2125 rq->cmd[6] = (nr >> 16) & 0xff; 2126 rq->cmd[7] = (nr >> 8) & 0xff; 2127 rq->cmd[8] = nr & 0xff; 2128 rq->cmd[9] = 0xf8; 2129 2130 rq->cmd_len = 12; 2131 rq->flags |= REQ_BLOCK_PC; 2132 rq->timeout = 60 * HZ; 2133 bio = rq->bio; 2134 2135 if (rq->bio) 2136 blk_queue_bounce(q, &rq->bio); 2137 2138 if (blk_execute_rq(q, cdi->disk, rq, 0)) { 2139 struct request_sense *s = rq->sense; 2140 ret = -EIO; 2141 cdi->last_sense = s->sense_key; 2142 } 2143 2144 if (blk_rq_unmap_user(bio, len)) 2145 ret = -EFAULT; 2146 2147 if (ret) 2148 break; 2149 2150 nframes -= nr; 2151 lba += nr; 2152 ubuf += len; 2153 } 2154 2155 blk_put_request(rq); 2156 return ret; 2157 } 2158 2159 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2160 int lba, int nframes) 2161 { 2162 int ret; 2163 2164 if (cdi->cdda_method == CDDA_OLD) 2165 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2166 2167 retry: 2168 /* 2169 * for anything else than success and io error, we need to retry 2170 */ 2171 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2172 if (!ret || ret != -EIO) 2173 return ret; 2174 2175 /* 2176 * I've seen drives get sense 4/8/3 udma crc errors on multi 2177 * frame dma, so drop to single frame dma if we need to 2178 */ 2179 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2180 printk("cdrom: dropping to single frame dma\n"); 2181 cdi->cdda_method = CDDA_BPC_SINGLE; 2182 goto retry; 2183 } 2184 2185 /* 2186 * so we have an io error of some sort with multi frame dma. if the 2187 * condition wasn't a hardware error 2188 * problems, not for any error 2189 */ 2190 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2191 return ret; 2192 2193 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2194 cdi->cdda_method = CDDA_OLD; 2195 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2196 } 2197 2198 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2199 void __user *argp) 2200 { 2201 struct cdrom_multisession ms_info; 2202 u8 requested_format; 2203 int ret; 2204 2205 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2206 2207 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2208 return -ENOSYS; 2209 2210 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2211 return -EFAULT; 2212 2213 requested_format = ms_info.addr_format; 2214 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2215 return -EINVAL; 2216 ms_info.addr_format = CDROM_LBA; 2217 2218 ret = cdi->ops->get_last_session(cdi, &ms_info); 2219 if (ret) 2220 return ret; 2221 2222 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2223 2224 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2225 return -EFAULT; 2226 2227 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2228 return 0; 2229 } 2230 2231 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2232 { 2233 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2234 2235 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2236 return -ENOSYS; 2237 if (cdi->use_count != 1 || keeplocked) 2238 return -EBUSY; 2239 if (CDROM_CAN(CDC_LOCK)) { 2240 int ret = cdi->ops->lock_door(cdi, 0); 2241 if (ret) 2242 return ret; 2243 } 2244 2245 return cdi->ops->tray_move(cdi, 1); 2246 } 2247 2248 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2249 { 2250 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2251 2252 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2253 return -ENOSYS; 2254 return cdi->ops->tray_move(cdi, 0); 2255 } 2256 2257 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2258 unsigned long arg) 2259 { 2260 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2261 2262 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2263 return -ENOSYS; 2264 if (keeplocked) 2265 return -EBUSY; 2266 2267 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2268 if (arg) 2269 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2270 return 0; 2271 } 2272 2273 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2274 unsigned long arg) 2275 { 2276 struct cdrom_changer_info *info; 2277 int ret; 2278 2279 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2280 2281 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2282 return -ENOSYS; 2283 2284 /* cannot select disc or select current disc */ 2285 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2286 return media_changed(cdi, 1); 2287 2288 if ((unsigned int)arg >= cdi->capacity) 2289 return -EINVAL; 2290 2291 info = kmalloc(sizeof(*info), GFP_KERNEL); 2292 if (!info) 2293 return -ENOMEM; 2294 2295 ret = cdrom_read_mech_status(cdi, info); 2296 if (!ret) 2297 ret = info->slots[arg].change; 2298 kfree(info); 2299 return ret; 2300 } 2301 2302 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2303 unsigned long arg) 2304 { 2305 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2306 2307 /* 2308 * Options need to be in sync with capability. 2309 * Too late for that, so we have to check each one separately. 2310 */ 2311 switch (arg) { 2312 case CDO_USE_FFLAGS: 2313 case CDO_CHECK_TYPE: 2314 break; 2315 case CDO_LOCK: 2316 if (!CDROM_CAN(CDC_LOCK)) 2317 return -ENOSYS; 2318 break; 2319 case 0: 2320 return cdi->options; 2321 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2322 default: 2323 if (!CDROM_CAN(arg)) 2324 return -ENOSYS; 2325 } 2326 cdi->options |= (int) arg; 2327 return cdi->options; 2328 } 2329 2330 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2331 unsigned long arg) 2332 { 2333 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2334 2335 cdi->options &= ~(int) arg; 2336 return cdi->options; 2337 } 2338 2339 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2340 unsigned long arg) 2341 { 2342 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2343 2344 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2345 return -ENOSYS; 2346 return cdi->ops->select_speed(cdi, arg); 2347 } 2348 2349 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2350 unsigned long arg) 2351 { 2352 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2353 2354 if (!CDROM_CAN(CDC_SELECT_DISC)) 2355 return -ENOSYS; 2356 2357 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2358 if ((int)arg >= cdi->capacity) 2359 return -EINVAL; 2360 } 2361 2362 /* 2363 * ->select_disc is a hook to allow a driver-specific way of 2364 * seleting disc. However, since there is no equivalent hook for 2365 * cdrom_slot_status this may not actually be useful... 2366 */ 2367 if (cdi->ops->select_disc) 2368 return cdi->ops->select_disc(cdi, arg); 2369 2370 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2371 return cdrom_select_disc(cdi, arg); 2372 } 2373 2374 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2375 struct block_device *bdev) 2376 { 2377 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2378 2379 if (!capable(CAP_SYS_ADMIN)) 2380 return -EACCES; 2381 if (!CDROM_CAN(CDC_RESET)) 2382 return -ENOSYS; 2383 invalidate_bdev(bdev, 0); 2384 return cdi->ops->reset(cdi); 2385 } 2386 2387 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2388 unsigned long arg) 2389 { 2390 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl"); 2391 2392 if (!CDROM_CAN(CDC_LOCK)) 2393 return -EDRIVE_CANT_DO_THIS; 2394 2395 keeplocked = arg ? 1 : 0; 2396 2397 /* 2398 * Don't unlock the door on multiple opens by default, but allow 2399 * root to do so. 2400 */ 2401 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2402 return -EBUSY; 2403 return cdi->ops->lock_door(cdi, arg); 2404 } 2405 2406 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2407 unsigned long arg) 2408 { 2409 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis"); 2410 2411 if (!capable(CAP_SYS_ADMIN)) 2412 return -EACCES; 2413 debug = arg ? 1 : 0; 2414 return debug; 2415 } 2416 2417 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2418 { 2419 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2420 return (cdi->ops->capability & ~cdi->mask); 2421 } 2422 2423 /* 2424 * The following function is implemented, although very few audio 2425 * discs give Universal Product Code information, which should just be 2426 * the Medium Catalog Number on the box. Note, that the way the code 2427 * is written on the CD is /not/ uniform across all discs! 2428 */ 2429 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2430 void __user *argp) 2431 { 2432 struct cdrom_mcn mcn; 2433 int ret; 2434 2435 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2436 2437 if (!(cdi->ops->capability & CDC_MCN)) 2438 return -ENOSYS; 2439 ret = cdi->ops->get_mcn(cdi, &mcn); 2440 if (ret) 2441 return ret; 2442 2443 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2444 return -EFAULT; 2445 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2446 return 0; 2447 } 2448 2449 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2450 unsigned long arg) 2451 { 2452 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2453 2454 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2455 return -ENOSYS; 2456 if (!CDROM_CAN(CDC_SELECT_DISC) || 2457 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2458 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2459 if (((int)arg >= cdi->capacity)) 2460 return -EINVAL; 2461 return cdrom_slot_status(cdi, arg); 2462 } 2463 2464 /* 2465 * Ok, this is where problems start. The current interface for the 2466 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2467 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this 2468 * is often the case, it is also very common for CDs to have some tracks 2469 * with data, and some tracks with audio. Just because I feel like it, 2470 * I declare the following to be the best way to cope. If the CD has ANY 2471 * data tracks on it, it will be returned as a data CD. If it has any XA 2472 * tracks, I will return it as that. Now I could simplify this interface 2473 * by combining these returns with the above, but this more clearly 2474 * demonstrates the problem with the current interface. Too bad this 2475 * wasn't designed to use bitmasks... -Erik 2476 * 2477 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2478 * User level programmers might feel the ioctl is not very useful. 2479 * ---david 2480 */ 2481 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2482 { 2483 tracktype tracks; 2484 2485 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2486 2487 cdrom_count_tracks(cdi, &tracks); 2488 if (tracks.error) 2489 return tracks.error; 2490 2491 /* Policy mode on */ 2492 if (tracks.audio > 0) { 2493 if (!tracks.data && !tracks.cdi && !tracks.xa) 2494 return CDS_AUDIO; 2495 else 2496 return CDS_MIXED; 2497 } 2498 2499 if (tracks.cdi > 0) 2500 return CDS_XA_2_2; 2501 if (tracks.xa > 0) 2502 return CDS_XA_2_1; 2503 if (tracks.data > 0) 2504 return CDS_DATA_1; 2505 /* Policy mode off */ 2506 2507 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n"); 2508 return CDS_NO_INFO; 2509 } 2510 2511 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2512 { 2513 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2514 return cdi->capacity; 2515 } 2516 2517 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2518 void __user *argp) 2519 { 2520 struct cdrom_subchnl q; 2521 u8 requested, back; 2522 int ret; 2523 2524 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2525 2526 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2527 return -ENOSYS; 2528 if (copy_from_user(&q, argp, sizeof(q))) 2529 return -EFAULT; 2530 2531 requested = q.cdsc_format; 2532 if (requested != CDROM_MSF && requested != CDROM_LBA) 2533 return -EINVAL; 2534 q.cdsc_format = CDROM_MSF; 2535 2536 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2537 if (ret) 2538 return ret; 2539 2540 back = q.cdsc_format; /* local copy */ 2541 sanitize_format(&q.cdsc_absaddr, &back, requested); 2542 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2543 2544 if (copy_to_user(argp, &q, sizeof(q))) 2545 return -EFAULT; 2546 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2547 return 0; 2548 } 2549 2550 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2551 void __user *argp) 2552 { 2553 struct cdrom_tochdr header; 2554 int ret; 2555 2556 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2557 2558 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2559 return -ENOSYS; 2560 if (copy_from_user(&header, argp, sizeof(header))) 2561 return -EFAULT; 2562 2563 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2564 if (ret) 2565 return ret; 2566 2567 if (copy_to_user(argp, &header, sizeof(header))) 2568 return -EFAULT; 2569 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2570 return 0; 2571 } 2572 2573 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2574 void __user *argp) 2575 { 2576 struct cdrom_tocentry entry; 2577 u8 requested_format; 2578 int ret; 2579 2580 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2581 2582 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2583 return -ENOSYS; 2584 if (copy_from_user(&entry, argp, sizeof(entry))) 2585 return -EFAULT; 2586 2587 requested_format = entry.cdte_format; 2588 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2589 return -EINVAL; 2590 /* make interface to low-level uniform */ 2591 entry.cdte_format = CDROM_MSF; 2592 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2593 if (ret) 2594 return ret; 2595 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2596 2597 if (copy_to_user(argp, &entry, sizeof(entry))) 2598 return -EFAULT; 2599 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2600 return 0; 2601 } 2602 2603 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2604 void __user *argp) 2605 { 2606 struct cdrom_msf msf; 2607 2608 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2609 2610 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2611 return -ENOSYS; 2612 if (copy_from_user(&msf, argp, sizeof(msf))) 2613 return -EFAULT; 2614 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2615 } 2616 2617 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2618 void __user *argp) 2619 { 2620 struct cdrom_ti ti; 2621 int ret; 2622 2623 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2624 2625 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2626 return -ENOSYS; 2627 if (copy_from_user(&ti, argp, sizeof(ti))) 2628 return -EFAULT; 2629 2630 ret = check_for_audio_disc(cdi, cdi->ops); 2631 if (ret) 2632 return ret; 2633 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2634 } 2635 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2636 void __user *argp) 2637 { 2638 struct cdrom_volctrl volume; 2639 2640 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2641 2642 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2643 return -ENOSYS; 2644 if (copy_from_user(&volume, argp, sizeof(volume))) 2645 return -EFAULT; 2646 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2647 } 2648 2649 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2650 void __user *argp) 2651 { 2652 struct cdrom_volctrl volume; 2653 int ret; 2654 2655 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2656 2657 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2658 return -ENOSYS; 2659 2660 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2661 if (ret) 2662 return ret; 2663 2664 if (copy_to_user(argp, &volume, sizeof(volume))) 2665 return -EFAULT; 2666 return 0; 2667 } 2668 2669 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2670 unsigned int cmd) 2671 { 2672 int ret; 2673 2674 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2675 2676 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2677 return -ENOSYS; 2678 ret = check_for_audio_disc(cdi, cdi->ops); 2679 if (ret) 2680 return ret; 2681 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2682 } 2683 2684 /* 2685 * Just about every imaginable ioctl is supported in the Uniform layer 2686 * these days. 2687 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 2688 */ 2689 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi, 2690 struct inode *ip, unsigned int cmd, unsigned long arg) 2691 { 2692 void __user *argp = (void __user *)arg; 2693 int ret; 2694 2695 /* 2696 * Try the generic SCSI command ioctl's first. 2697 */ 2698 ret = scsi_cmd_ioctl(file, ip->i_bdev->bd_disk, cmd, argp); 2699 if (ret != -ENOTTY) 2700 return ret; 2701 2702 switch (cmd) { 2703 case CDROMMULTISESSION: 2704 return cdrom_ioctl_multisession(cdi, argp); 2705 case CDROMEJECT: 2706 return cdrom_ioctl_eject(cdi); 2707 case CDROMCLOSETRAY: 2708 return cdrom_ioctl_closetray(cdi); 2709 case CDROMEJECT_SW: 2710 return cdrom_ioctl_eject_sw(cdi, arg); 2711 case CDROM_MEDIA_CHANGED: 2712 return cdrom_ioctl_media_changed(cdi, arg); 2713 case CDROM_SET_OPTIONS: 2714 return cdrom_ioctl_set_options(cdi, arg); 2715 case CDROM_CLEAR_OPTIONS: 2716 return cdrom_ioctl_clear_options(cdi, arg); 2717 case CDROM_SELECT_SPEED: 2718 return cdrom_ioctl_select_speed(cdi, arg); 2719 case CDROM_SELECT_DISC: 2720 return cdrom_ioctl_select_disc(cdi, arg); 2721 case CDROMRESET: 2722 return cdrom_ioctl_reset(cdi, ip->i_bdev); 2723 case CDROM_LOCKDOOR: 2724 return cdrom_ioctl_lock_door(cdi, arg); 2725 case CDROM_DEBUG: 2726 return cdrom_ioctl_debug(cdi, arg); 2727 case CDROM_GET_CAPABILITY: 2728 return cdrom_ioctl_get_capability(cdi); 2729 case CDROM_GET_MCN: 2730 return cdrom_ioctl_get_mcn(cdi, argp); 2731 case CDROM_DRIVE_STATUS: 2732 return cdrom_ioctl_drive_status(cdi, arg); 2733 case CDROM_DISC_STATUS: 2734 return cdrom_ioctl_disc_status(cdi); 2735 case CDROM_CHANGER_NSLOTS: 2736 return cdrom_ioctl_changer_nslots(cdi); 2737 } 2738 2739 /* 2740 * Use the ioctls that are implemented through the generic_packet() 2741 * interface. this may look at bit funny, but if -ENOTTY is 2742 * returned that particular ioctl is not implemented and we 2743 * let it go through the device specific ones. 2744 */ 2745 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 2746 ret = mmc_ioctl(cdi, cmd, arg); 2747 if (ret != -ENOTTY) 2748 return ret; 2749 } 2750 2751 /* 2752 * Note: most of the cdinfo() calls are commented out here, 2753 * because they fill up the sys log when CD players poll 2754 * the drive. 2755 */ 2756 switch (cmd) { 2757 case CDROMSUBCHNL: 2758 return cdrom_ioctl_get_subchnl(cdi, argp); 2759 case CDROMREADTOCHDR: 2760 return cdrom_ioctl_read_tochdr(cdi, argp); 2761 case CDROMREADTOCENTRY: 2762 return cdrom_ioctl_read_tocentry(cdi, argp); 2763 case CDROMPLAYMSF: 2764 return cdrom_ioctl_play_msf(cdi, argp); 2765 case CDROMPLAYTRKIND: 2766 return cdrom_ioctl_play_trkind(cdi, argp); 2767 case CDROMVOLCTRL: 2768 return cdrom_ioctl_volctrl(cdi, argp); 2769 case CDROMVOLREAD: 2770 return cdrom_ioctl_volread(cdi, argp); 2771 case CDROMSTART: 2772 case CDROMSTOP: 2773 case CDROMPAUSE: 2774 case CDROMRESUME: 2775 return cdrom_ioctl_audioctl(cdi, cmd); 2776 } 2777 2778 return -ENOSYS; 2779 } 2780 2781 static inline 2782 int msf_to_lba(char m, char s, char f) 2783 { 2784 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; 2785 } 2786 2787 /* 2788 * Required when we need to use READ_10 to issue other than 2048 block 2789 * reads 2790 */ 2791 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2792 { 2793 struct cdrom_device_ops *cdo = cdi->ops; 2794 struct packet_command cgc; 2795 struct modesel_head mh; 2796 2797 memset(&mh, 0, sizeof(mh)); 2798 mh.block_desc_length = 0x08; 2799 mh.block_length_med = (size >> 8) & 0xff; 2800 mh.block_length_lo = size & 0xff; 2801 2802 memset(&cgc, 0, sizeof(cgc)); 2803 cgc.cmd[0] = 0x15; 2804 cgc.cmd[1] = 1 << 4; 2805 cgc.cmd[4] = 12; 2806 cgc.buflen = sizeof(mh); 2807 cgc.buffer = (char *) &mh; 2808 cgc.data_direction = CGC_DATA_WRITE; 2809 mh.block_desc_length = 0x08; 2810 mh.block_length_med = (size >> 8) & 0xff; 2811 mh.block_length_lo = size & 0xff; 2812 2813 return cdo->generic_packet(cdi, &cgc); 2814 } 2815 2816 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 2817 unsigned long arg) 2818 { 2819 struct cdrom_device_ops *cdo = cdi->ops; 2820 struct packet_command cgc; 2821 struct request_sense sense; 2822 unsigned char buffer[32]; 2823 int ret = 0; 2824 2825 memset(&cgc, 0, sizeof(cgc)); 2826 2827 /* build a unified command and queue it through 2828 cdo->generic_packet() */ 2829 switch (cmd) { 2830 case CDROMREADRAW: 2831 case CDROMREADMODE1: 2832 case CDROMREADMODE2: { 2833 struct cdrom_msf msf; 2834 int blocksize = 0, format = 0, lba; 2835 2836 switch (cmd) { 2837 case CDROMREADRAW: 2838 blocksize = CD_FRAMESIZE_RAW; 2839 break; 2840 case CDROMREADMODE1: 2841 blocksize = CD_FRAMESIZE; 2842 format = 2; 2843 break; 2844 case CDROMREADMODE2: 2845 blocksize = CD_FRAMESIZE_RAW0; 2846 break; 2847 } 2848 IOCTL_IN(arg, struct cdrom_msf, msf); 2849 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0); 2850 /* FIXME: we need upper bound checking, too!! */ 2851 if (lba < 0) 2852 return -EINVAL; 2853 cgc.buffer = (char *) kmalloc(blocksize, GFP_KERNEL); 2854 if (cgc.buffer == NULL) 2855 return -ENOMEM; 2856 memset(&sense, 0, sizeof(sense)); 2857 cgc.sense = &sense; 2858 cgc.data_direction = CGC_DATA_READ; 2859 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize); 2860 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) { 2861 /* 2862 * SCSI-II devices are not required to support 2863 * READ_CD, so let's try switching block size 2864 */ 2865 /* FIXME: switch back again... */ 2866 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) { 2867 kfree(cgc.buffer); 2868 return ret; 2869 } 2870 cgc.sense = NULL; 2871 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1); 2872 ret |= cdrom_switch_blocksize(cdi, blocksize); 2873 } 2874 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize)) 2875 ret = -EFAULT; 2876 kfree(cgc.buffer); 2877 return ret; 2878 } 2879 case CDROMREADAUDIO: { 2880 struct cdrom_read_audio ra; 2881 int lba; 2882 2883 IOCTL_IN(arg, struct cdrom_read_audio, ra); 2884 2885 if (ra.addr_format == CDROM_MSF) 2886 lba = msf_to_lba(ra.addr.msf.minute, 2887 ra.addr.msf.second, 2888 ra.addr.msf.frame); 2889 else if (ra.addr_format == CDROM_LBA) 2890 lba = ra.addr.lba; 2891 else 2892 return -EINVAL; 2893 2894 /* FIXME: we need upper bound checking, too!! */ 2895 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 2896 return -EINVAL; 2897 2898 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 2899 } 2900 case CDROMSUBCHNL: { 2901 struct cdrom_subchnl q; 2902 u_char requested, back; 2903 IOCTL_IN(arg, struct cdrom_subchnl, q); 2904 requested = q.cdsc_format; 2905 if (!((requested == CDROM_MSF) || 2906 (requested == CDROM_LBA))) 2907 return -EINVAL; 2908 q.cdsc_format = CDROM_MSF; 2909 if ((ret = cdrom_read_subchannel(cdi, &q, 0))) 2910 return ret; 2911 back = q.cdsc_format; /* local copy */ 2912 sanitize_format(&q.cdsc_absaddr, &back, requested); 2913 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2914 IOCTL_OUT(arg, struct cdrom_subchnl, q); 2915 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2916 return 0; 2917 } 2918 case CDROMPLAYMSF: { 2919 struct cdrom_msf msf; 2920 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2921 IOCTL_IN(arg, struct cdrom_msf, msf); 2922 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 2923 cgc.cmd[3] = msf.cdmsf_min0; 2924 cgc.cmd[4] = msf.cdmsf_sec0; 2925 cgc.cmd[5] = msf.cdmsf_frame0; 2926 cgc.cmd[6] = msf.cdmsf_min1; 2927 cgc.cmd[7] = msf.cdmsf_sec1; 2928 cgc.cmd[8] = msf.cdmsf_frame1; 2929 cgc.data_direction = CGC_DATA_NONE; 2930 return cdo->generic_packet(cdi, &cgc); 2931 } 2932 case CDROMPLAYBLK: { 2933 struct cdrom_blk blk; 2934 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 2935 IOCTL_IN(arg, struct cdrom_blk, blk); 2936 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10; 2937 cgc.cmd[2] = (blk.from >> 24) & 0xff; 2938 cgc.cmd[3] = (blk.from >> 16) & 0xff; 2939 cgc.cmd[4] = (blk.from >> 8) & 0xff; 2940 cgc.cmd[5] = blk.from & 0xff; 2941 cgc.cmd[7] = (blk.len >> 8) & 0xff; 2942 cgc.cmd[8] = blk.len & 0xff; 2943 cgc.data_direction = CGC_DATA_NONE; 2944 return cdo->generic_packet(cdi, &cgc); 2945 } 2946 case CDROMVOLCTRL: 2947 case CDROMVOLREAD: { 2948 struct cdrom_volctrl volctrl; 2949 char mask[sizeof(buffer)]; 2950 unsigned short offset; 2951 2952 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 2953 2954 IOCTL_IN(arg, struct cdrom_volctrl, volctrl); 2955 2956 cgc.buffer = buffer; 2957 cgc.buflen = 24; 2958 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0))) 2959 return ret; 2960 2961 /* originally the code depended on buffer[1] to determine 2962 how much data is available for transfer. buffer[1] is 2963 unfortunately ambigious and the only reliable way seem 2964 to be to simply skip over the block descriptor... */ 2965 offset = 8 + be16_to_cpu(*(unsigned short *)(buffer+6)); 2966 2967 if (offset + 16 > sizeof(buffer)) 2968 return -E2BIG; 2969 2970 if (offset + 16 > cgc.buflen) { 2971 cgc.buflen = offset+16; 2972 ret = cdrom_mode_sense(cdi, &cgc, 2973 GPMODE_AUDIO_CTL_PAGE, 0); 2974 if (ret) 2975 return ret; 2976 } 2977 2978 /* sanity check */ 2979 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 2980 buffer[offset+1] < 14) 2981 return -EINVAL; 2982 2983 /* now we have the current volume settings. if it was only 2984 a CDROMVOLREAD, return these values */ 2985 if (cmd == CDROMVOLREAD) { 2986 volctrl.channel0 = buffer[offset+9]; 2987 volctrl.channel1 = buffer[offset+11]; 2988 volctrl.channel2 = buffer[offset+13]; 2989 volctrl.channel3 = buffer[offset+15]; 2990 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl); 2991 return 0; 2992 } 2993 2994 /* get the volume mask */ 2995 cgc.buffer = mask; 2996 if ((ret = cdrom_mode_sense(cdi, &cgc, 2997 GPMODE_AUDIO_CTL_PAGE, 1))) 2998 return ret; 2999 3000 buffer[offset+9] = volctrl.channel0 & mask[offset+9]; 3001 buffer[offset+11] = volctrl.channel1 & mask[offset+11]; 3002 buffer[offset+13] = volctrl.channel2 & mask[offset+13]; 3003 buffer[offset+15] = volctrl.channel3 & mask[offset+15]; 3004 3005 /* set volume */ 3006 cgc.buffer = buffer + offset - 8; 3007 memset(cgc.buffer, 0, 8); 3008 return cdrom_mode_select(cdi, &cgc); 3009 } 3010 3011 case CDROMSTART: 3012 case CDROMSTOP: { 3013 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3014 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 3015 cgc.cmd[1] = 1; 3016 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3017 cgc.data_direction = CGC_DATA_NONE; 3018 return cdo->generic_packet(cdi, &cgc); 3019 } 3020 3021 case CDROMPAUSE: 3022 case CDROMRESUME: { 3023 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3024 cgc.cmd[0] = GPCMD_PAUSE_RESUME; 3025 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3026 cgc.data_direction = CGC_DATA_NONE; 3027 return cdo->generic_packet(cdi, &cgc); 3028 } 3029 3030 case DVD_READ_STRUCT: { 3031 dvd_struct *s; 3032 int size = sizeof(dvd_struct); 3033 if (!CDROM_CAN(CDC_DVD)) 3034 return -ENOSYS; 3035 if ((s = (dvd_struct *) kmalloc(size, GFP_KERNEL)) == NULL) 3036 return -ENOMEM; 3037 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3038 if (copy_from_user(s, (dvd_struct __user *)arg, size)) { 3039 kfree(s); 3040 return -EFAULT; 3041 } 3042 if ((ret = dvd_read_struct(cdi, s))) { 3043 kfree(s); 3044 return ret; 3045 } 3046 if (copy_to_user((dvd_struct __user *)arg, s, size)) 3047 ret = -EFAULT; 3048 kfree(s); 3049 return ret; 3050 } 3051 3052 case DVD_AUTH: { 3053 dvd_authinfo ai; 3054 if (!CDROM_CAN(CDC_DVD)) 3055 return -ENOSYS; 3056 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3057 IOCTL_IN(arg, dvd_authinfo, ai); 3058 if ((ret = dvd_do_auth (cdi, &ai))) 3059 return ret; 3060 IOCTL_OUT(arg, dvd_authinfo, ai); 3061 return 0; 3062 } 3063 3064 case CDROM_NEXT_WRITABLE: { 3065 long next = 0; 3066 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3067 if ((ret = cdrom_get_next_writable(cdi, &next))) 3068 return ret; 3069 IOCTL_OUT(arg, long, next); 3070 return 0; 3071 } 3072 case CDROM_LAST_WRITTEN: { 3073 long last = 0; 3074 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3075 if ((ret = cdrom_get_last_written(cdi, &last))) 3076 return ret; 3077 IOCTL_OUT(arg, long, last); 3078 return 0; 3079 } 3080 } /* switch */ 3081 3082 return -ENOTTY; 3083 } 3084 3085 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type, 3086 track_information *ti) 3087 { 3088 struct cdrom_device_ops *cdo = cdi->ops; 3089 struct packet_command cgc; 3090 int ret, buflen; 3091 3092 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 3093 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 3094 cgc.cmd[1] = type & 3; 3095 cgc.cmd[4] = (track & 0xff00) >> 8; 3096 cgc.cmd[5] = track & 0xff; 3097 cgc.cmd[8] = 8; 3098 cgc.quiet = 1; 3099 3100 if ((ret = cdo->generic_packet(cdi, &cgc))) 3101 return ret; 3102 3103 buflen = be16_to_cpu(ti->track_information_length) + 3104 sizeof(ti->track_information_length); 3105 3106 if (buflen > sizeof(track_information)) 3107 buflen = sizeof(track_information); 3108 3109 cgc.cmd[8] = cgc.buflen = buflen; 3110 if ((ret = cdo->generic_packet(cdi, &cgc))) 3111 return ret; 3112 3113 /* return actual fill size */ 3114 return buflen; 3115 } 3116 3117 /* requires CD R/RW */ 3118 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) 3119 { 3120 struct cdrom_device_ops *cdo = cdi->ops; 3121 struct packet_command cgc; 3122 int ret, buflen; 3123 3124 /* set up command and get the disc info */ 3125 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 3126 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 3127 cgc.cmd[8] = cgc.buflen = 2; 3128 cgc.quiet = 1; 3129 3130 if ((ret = cdo->generic_packet(cdi, &cgc))) 3131 return ret; 3132 3133 /* not all drives have the same disc_info length, so requeue 3134 * packet with the length the drive tells us it can supply 3135 */ 3136 buflen = be16_to_cpu(di->disc_information_length) + 3137 sizeof(di->disc_information_length); 3138 3139 if (buflen > sizeof(disc_information)) 3140 buflen = sizeof(disc_information); 3141 3142 cgc.cmd[8] = cgc.buflen = buflen; 3143 if ((ret = cdo->generic_packet(cdi, &cgc))) 3144 return ret; 3145 3146 /* return actual fill size */ 3147 return buflen; 3148 } 3149 3150 /* return the last written block on the CD-R media. this is for the udf 3151 file system. */ 3152 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 3153 { 3154 struct cdrom_tocentry toc; 3155 disc_information di; 3156 track_information ti; 3157 __u32 last_track; 3158 int ret = -1, ti_size; 3159 3160 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3161 goto use_toc; 3162 3163 ret = cdrom_get_disc_info(cdi, &di); 3164 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 3165 + sizeof(di.last_track_lsb))) 3166 goto use_toc; 3167 3168 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3169 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3170 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3171 if (ti_size < (int)offsetof(typeof(ti), track_start)) 3172 goto use_toc; 3173 3174 /* if this track is blank, try the previous. */ 3175 if (ti.blank) { 3176 if (last_track==1) 3177 goto use_toc; 3178 last_track--; 3179 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3180 } 3181 3182 if (ti_size < (int)(offsetof(typeof(ti), track_size) 3183 + sizeof(ti.track_size))) 3184 goto use_toc; 3185 3186 /* if last recorded field is valid, return it. */ 3187 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 3188 + sizeof(ti.last_rec_address))) { 3189 *last_written = be32_to_cpu(ti.last_rec_address); 3190 } else { 3191 /* make it up instead */ 3192 *last_written = be32_to_cpu(ti.track_start) + 3193 be32_to_cpu(ti.track_size); 3194 if (ti.free_blocks) 3195 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 3196 } 3197 return 0; 3198 3199 /* this is where we end up if the drive either can't do a 3200 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 3201 it doesn't give enough information or fails. then we return 3202 the toc contents. */ 3203 use_toc: 3204 toc.cdte_format = CDROM_MSF; 3205 toc.cdte_track = CDROM_LEADOUT; 3206 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 3207 return ret; 3208 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 3209 *last_written = toc.cdte_addr.lba; 3210 return 0; 3211 } 3212 3213 /* return the next writable block. also for udf file system. */ 3214 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable) 3215 { 3216 disc_information di; 3217 track_information ti; 3218 __u16 last_track; 3219 int ret, ti_size; 3220 3221 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3222 goto use_last_written; 3223 3224 ret = cdrom_get_disc_info(cdi, &di); 3225 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 3226 + sizeof(di.last_track_lsb)) 3227 goto use_last_written; 3228 3229 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3230 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3231 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3232 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 3233 goto use_last_written; 3234 3235 /* if this track is blank, try the previous. */ 3236 if (ti.blank) { 3237 if (last_track == 1) 3238 goto use_last_written; 3239 last_track--; 3240 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3241 if (ti_size < 0) 3242 goto use_last_written; 3243 } 3244 3245 /* if next recordable address field is valid, use it. */ 3246 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 3247 + sizeof(ti.next_writable)) { 3248 *next_writable = be32_to_cpu(ti.next_writable); 3249 return 0; 3250 } 3251 3252 use_last_written: 3253 if ((ret = cdrom_get_last_written(cdi, next_writable))) { 3254 *next_writable = 0; 3255 return ret; 3256 } else { 3257 *next_writable += 7; 3258 return 0; 3259 } 3260 } 3261 3262 EXPORT_SYMBOL(cdrom_get_last_written); 3263 EXPORT_SYMBOL(register_cdrom); 3264 EXPORT_SYMBOL(unregister_cdrom); 3265 EXPORT_SYMBOL(cdrom_open); 3266 EXPORT_SYMBOL(cdrom_release); 3267 EXPORT_SYMBOL(cdrom_ioctl); 3268 EXPORT_SYMBOL(cdrom_media_changed); 3269 EXPORT_SYMBOL(cdrom_number_of_slots); 3270 EXPORT_SYMBOL(cdrom_mode_select); 3271 EXPORT_SYMBOL(cdrom_mode_sense); 3272 EXPORT_SYMBOL(init_cdrom_command); 3273 EXPORT_SYMBOL(cdrom_get_media_event); 3274 3275 #ifdef CONFIG_SYSCTL 3276 3277 #define CDROM_STR_SIZE 1000 3278 3279 static struct cdrom_sysctl_settings { 3280 char info[CDROM_STR_SIZE]; /* general info */ 3281 int autoclose; /* close tray upon mount, etc */ 3282 int autoeject; /* eject on umount */ 3283 int debug; /* turn on debugging messages */ 3284 int lock; /* lock the door on device open */ 3285 int check; /* check media type */ 3286 } cdrom_sysctl_settings; 3287 3288 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp, 3289 void __user *buffer, size_t *lenp, loff_t *ppos) 3290 { 3291 int pos; 3292 struct cdrom_device_info *cdi; 3293 char *info = cdrom_sysctl_settings.info; 3294 3295 if (!*lenp || (*ppos && !write)) { 3296 *lenp = 0; 3297 return 0; 3298 } 3299 3300 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3301 3302 pos += sprintf(info+pos, "\ndrive name:\t"); 3303 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3304 pos += sprintf(info+pos, "\t%s", cdi->name); 3305 3306 pos += sprintf(info+pos, "\ndrive speed:\t"); 3307 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3308 pos += sprintf(info+pos, "\t%d", cdi->speed); 3309 3310 pos += sprintf(info+pos, "\ndrive # of slots:"); 3311 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3312 pos += sprintf(info+pos, "\t%d", cdi->capacity); 3313 3314 pos += sprintf(info+pos, "\nCan close tray:\t"); 3315 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3316 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CLOSE_TRAY) != 0); 3317 3318 pos += sprintf(info+pos, "\nCan open tray:\t"); 3319 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3320 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_OPEN_TRAY) != 0); 3321 3322 pos += sprintf(info+pos, "\nCan lock tray:\t"); 3323 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3324 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_LOCK) != 0); 3325 3326 pos += sprintf(info+pos, "\nCan change speed:"); 3327 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3328 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_SPEED) != 0); 3329 3330 pos += sprintf(info+pos, "\nCan select disk:"); 3331 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3332 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_SELECT_DISC) != 0); 3333 3334 pos += sprintf(info+pos, "\nCan read multisession:"); 3335 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3336 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MULTI_SESSION) != 0); 3337 3338 pos += sprintf(info+pos, "\nCan read MCN:\t"); 3339 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3340 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MCN) != 0); 3341 3342 pos += sprintf(info+pos, "\nReports media changed:"); 3343 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3344 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MEDIA_CHANGED) != 0); 3345 3346 pos += sprintf(info+pos, "\nCan play audio:\t"); 3347 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3348 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_PLAY_AUDIO) != 0); 3349 3350 pos += sprintf(info+pos, "\nCan write CD-R:\t"); 3351 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3352 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_R) != 0); 3353 3354 pos += sprintf(info+pos, "\nCan write CD-RW:"); 3355 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3356 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_CD_RW) != 0); 3357 3358 pos += sprintf(info+pos, "\nCan read DVD:\t"); 3359 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3360 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD) != 0); 3361 3362 pos += sprintf(info+pos, "\nCan write DVD-R:"); 3363 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3364 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_R) != 0); 3365 3366 pos += sprintf(info+pos, "\nCan write DVD-RAM:"); 3367 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3368 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_DVD_RAM) != 0); 3369 3370 pos += sprintf(info+pos, "\nCan read MRW:\t"); 3371 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3372 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW) != 0); 3373 3374 pos += sprintf(info+pos, "\nCan write MRW:\t"); 3375 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3376 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_MRW_W) != 0); 3377 3378 pos += sprintf(info+pos, "\nCan write RAM:\t"); 3379 for (cdi=topCdromPtr;cdi!=NULL;cdi=cdi->next) 3380 pos += sprintf(info+pos, "\t%d", CDROM_CAN(CDC_RAM) != 0); 3381 3382 strcpy(info+pos,"\n\n"); 3383 3384 return proc_dostring(ctl, write, filp, buffer, lenp, ppos); 3385 } 3386 3387 /* Unfortunately, per device settings are not implemented through 3388 procfs/sysctl yet. When they are, this will naturally disappear. For now 3389 just update all drives. Later this will become the template on which 3390 new registered drives will be based. */ 3391 static void cdrom_update_settings(void) 3392 { 3393 struct cdrom_device_info *cdi; 3394 3395 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) { 3396 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3397 cdi->options |= CDO_AUTO_CLOSE; 3398 else if (!autoclose) 3399 cdi->options &= ~CDO_AUTO_CLOSE; 3400 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3401 cdi->options |= CDO_AUTO_EJECT; 3402 else if (!autoeject) 3403 cdi->options &= ~CDO_AUTO_EJECT; 3404 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3405 cdi->options |= CDO_LOCK; 3406 else if (!lockdoor) 3407 cdi->options &= ~CDO_LOCK; 3408 if (check_media_type) 3409 cdi->options |= CDO_CHECK_TYPE; 3410 else 3411 cdi->options &= ~CDO_CHECK_TYPE; 3412 } 3413 } 3414 3415 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp, 3416 void __user *buffer, size_t *lenp, loff_t *ppos) 3417 { 3418 int *valp = ctl->data; 3419 int val = *valp; 3420 int ret; 3421 3422 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); 3423 3424 if (write && *valp != val) { 3425 3426 /* we only care for 1 or 0. */ 3427 if (*valp) 3428 *valp = 1; 3429 else 3430 *valp = 0; 3431 3432 switch (ctl->ctl_name) { 3433 case DEV_CDROM_AUTOCLOSE: { 3434 if (valp == &cdrom_sysctl_settings.autoclose) 3435 autoclose = cdrom_sysctl_settings.autoclose; 3436 break; 3437 } 3438 case DEV_CDROM_AUTOEJECT: { 3439 if (valp == &cdrom_sysctl_settings.autoeject) 3440 autoeject = cdrom_sysctl_settings.autoeject; 3441 break; 3442 } 3443 case DEV_CDROM_DEBUG: { 3444 if (valp == &cdrom_sysctl_settings.debug) 3445 debug = cdrom_sysctl_settings.debug; 3446 break; 3447 } 3448 case DEV_CDROM_LOCK: { 3449 if (valp == &cdrom_sysctl_settings.lock) 3450 lockdoor = cdrom_sysctl_settings.lock; 3451 break; 3452 } 3453 case DEV_CDROM_CHECK_MEDIA: { 3454 if (valp == &cdrom_sysctl_settings.check) 3455 check_media_type = cdrom_sysctl_settings.check; 3456 break; 3457 } 3458 } 3459 /* update the option flags according to the changes. we 3460 don't have per device options through sysctl yet, 3461 but we will have and then this will disappear. */ 3462 cdrom_update_settings(); 3463 } 3464 3465 return ret; 3466 } 3467 3468 /* Place files in /proc/sys/dev/cdrom */ 3469 static ctl_table cdrom_table[] = { 3470 { 3471 .ctl_name = DEV_CDROM_INFO, 3472 .procname = "info", 3473 .data = &cdrom_sysctl_settings.info, 3474 .maxlen = CDROM_STR_SIZE, 3475 .mode = 0444, 3476 .proc_handler = &cdrom_sysctl_info, 3477 }, 3478 { 3479 .ctl_name = DEV_CDROM_AUTOCLOSE, 3480 .procname = "autoclose", 3481 .data = &cdrom_sysctl_settings.autoclose, 3482 .maxlen = sizeof(int), 3483 .mode = 0644, 3484 .proc_handler = &cdrom_sysctl_handler, 3485 }, 3486 { 3487 .ctl_name = DEV_CDROM_AUTOEJECT, 3488 .procname = "autoeject", 3489 .data = &cdrom_sysctl_settings.autoeject, 3490 .maxlen = sizeof(int), 3491 .mode = 0644, 3492 .proc_handler = &cdrom_sysctl_handler, 3493 }, 3494 { 3495 .ctl_name = DEV_CDROM_DEBUG, 3496 .procname = "debug", 3497 .data = &cdrom_sysctl_settings.debug, 3498 .maxlen = sizeof(int), 3499 .mode = 0644, 3500 .proc_handler = &cdrom_sysctl_handler, 3501 }, 3502 { 3503 .ctl_name = DEV_CDROM_LOCK, 3504 .procname = "lock", 3505 .data = &cdrom_sysctl_settings.lock, 3506 .maxlen = sizeof(int), 3507 .mode = 0644, 3508 .proc_handler = &cdrom_sysctl_handler, 3509 }, 3510 { 3511 .ctl_name = DEV_CDROM_CHECK_MEDIA, 3512 .procname = "check_media", 3513 .data = &cdrom_sysctl_settings.check, 3514 .maxlen = sizeof(int), 3515 .mode = 0644, 3516 .proc_handler = &cdrom_sysctl_handler 3517 }, 3518 { .ctl_name = 0 } 3519 }; 3520 3521 static ctl_table cdrom_cdrom_table[] = { 3522 { 3523 .ctl_name = DEV_CDROM, 3524 .procname = "cdrom", 3525 .maxlen = 0, 3526 .mode = 0555, 3527 .child = cdrom_table, 3528 }, 3529 { .ctl_name = 0 } 3530 }; 3531 3532 /* Make sure that /proc/sys/dev is there */ 3533 static ctl_table cdrom_root_table[] = { 3534 { 3535 .ctl_name = CTL_DEV, 3536 .procname = "dev", 3537 .maxlen = 0, 3538 .mode = 0555, 3539 .child = cdrom_cdrom_table, 3540 }, 3541 { .ctl_name = 0 } 3542 }; 3543 static struct ctl_table_header *cdrom_sysctl_header; 3544 3545 static void cdrom_sysctl_register(void) 3546 { 3547 static int initialized; 3548 3549 if (initialized == 1) 3550 return; 3551 3552 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table, 1); 3553 if (cdrom_root_table->ctl_name && cdrom_root_table->child->de) 3554 cdrom_root_table->child->de->owner = THIS_MODULE; 3555 3556 /* set the defaults */ 3557 cdrom_sysctl_settings.autoclose = autoclose; 3558 cdrom_sysctl_settings.autoeject = autoeject; 3559 cdrom_sysctl_settings.debug = debug; 3560 cdrom_sysctl_settings.lock = lockdoor; 3561 cdrom_sysctl_settings.check = check_media_type; 3562 3563 initialized = 1; 3564 } 3565 3566 static void cdrom_sysctl_unregister(void) 3567 { 3568 if (cdrom_sysctl_header) 3569 unregister_sysctl_table(cdrom_sysctl_header); 3570 } 3571 3572 #endif /* CONFIG_SYSCTL */ 3573 3574 static int __init cdrom_init(void) 3575 { 3576 #ifdef CONFIG_SYSCTL 3577 cdrom_sysctl_register(); 3578 #endif 3579 return 0; 3580 } 3581 3582 static void __exit cdrom_exit(void) 3583 { 3584 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n"); 3585 #ifdef CONFIG_SYSCTL 3586 cdrom_sysctl_unregister(); 3587 #endif 3588 } 3589 3590 module_init(cdrom_init); 3591 module_exit(cdrom_exit); 3592 MODULE_LICENSE("GPL"); 3593