1 /* linux/drivers/cdrom/cdrom.c 2 Copyright (c) 1996, 1997 David A. van Leeuwen. 3 Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org> 4 Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk> 5 6 May be copied or modified under the terms of the GNU General Public 7 License. See linux/COPYING for more information. 8 9 Uniform CD-ROM driver for Linux. 10 See Documentation/cdrom/cdrom-standard.tex for usage information. 11 12 The routines in the file provide a uniform interface between the 13 software that uses CD-ROMs and the various low-level drivers that 14 actually talk to the hardware. Suggestions are welcome. 15 Patches that work are more welcome though. ;-) 16 17 To Do List: 18 ---------------------------------- 19 20 -- Modify sysctl/proc interface. I plan on having one directory per 21 drive, with entries for outputing general drive information, and sysctl 22 based tunable parameters such as whether the tray should auto-close for 23 that drive. Suggestions (or patches) for this welcome! 24 25 26 Revision History 27 ---------------------------------- 28 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl> 29 -- Initial version by David A. van Leeuwen. I don't have a detailed 30 changelog for the 1.x series, David? 31 32 2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org> 33 -- New maintainer! As David A. van Leeuwen has been too busy to activly 34 maintain and improve this driver, I am now carrying on the torch. If 35 you have a problem with this driver, please feel free to contact me. 36 37 -- Added (rudimentary) sysctl interface. I realize this is really weak 38 right now, and is _very_ badly implemented. It will be improved... 39 40 -- Modified CDROM_DISC_STATUS so that it is now incorporated into 41 the Uniform CD-ROM driver via the cdrom_count_tracks function. 42 The cdrom_count_tracks function helps resolve some of the false 43 assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check 44 for the correct media type when mounting or playing audio from a CD. 45 46 -- Remove the calls to verify_area and only use the copy_from_user and 47 copy_to_user stuff, since these calls now provide their own memory 48 checking with the 2.1.x kernels. 49 50 -- Major update to return codes so that errors from low-level drivers 51 are passed on through (thanks to Gerd Knorr for pointing out this 52 problem). 53 54 -- Made it so if a function isn't implemented in a low-level driver, 55 ENOSYS is now returned instead of EINVAL. 56 57 -- Simplified some complex logic so that the source code is easier to read. 58 59 -- Other stuff I probably forgot to mention (lots of changes). 60 61 2.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 64 2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org> 65 -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that 66 copy_*_user does not return EFAULT on error, but instead returns the number 67 of bytes not copied. I was returning whatever non-zero stuff came back from 68 the copy_*_user functions directly, which would result in strange errors. 69 70 2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org> 71 -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed 72 of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing 73 this out and providing a simple fix. 74 -- Fixed the procfs-unload-module bug with the fill_inode procfs callback. 75 thanks to Andrea Arcangeli 76 -- Fixed it so that the /proc entry now also shows up when cdrom is 77 compiled into the kernel. Before it only worked when loaded as a module. 78 79 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org> 80 -- Fixed a bug in cdrom_media_changed and handling of reporting that 81 the media had changed for devices that _don't_ implement media_changed. 82 Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug. 83 -- Made a few things more pedanticly correct. 84 85 2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk> 86 -- New maintainers! Erik was too busy to continue the work on the driver, 87 so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk> 88 will do their best to follow in his footsteps 89 90 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk> 91 -- Check if drive is capable of doing what we ask before blindly changing 92 cdi->options in various ioctl. 93 -- Added version to proc entry. 94 95 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk> 96 -- Fixed an error in open_for_data where we would sometimes not return 97 the correct error value. Thanks Huba Gaspar <huba@softcell.hu>. 98 -- Fixed module usage count - usage was based on /proc/sys/dev 99 instead of /proc/sys/dev/cdrom. This could lead to an oops when other 100 modules had entries in dev. Feb 02 - real bug was in sysctl.c where 101 dev would be removed even though it was used. cdrom.c just illuminated 102 that bug. 103 104 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk> 105 -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has 106 been "rewritten" because capabilities and options aren't in sync. They 107 should be... 108 -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way. 109 -- Added CDROM_RESET ioctl. 110 -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly. 111 -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs 112 from parsing /proc/sys/dev/cdrom/info. 113 114 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk> 115 -- Check capability mask from low level driver when counting tracks as 116 per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>. 117 118 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk> 119 -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of 120 CDC_CLOSE_TRAY. 121 -- proc info didn't mask against capabilities mask. 122 123 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk> 124 -- Unified audio ioctl handling across CD-ROM drivers. A lot of the 125 code was duplicated before. Drives that support the generic packet 126 interface are now being fed packets from here instead. 127 -- First attempt at adding support for MMC2 commands - for DVD and 128 CD-R(W) drives. Only the DVD parts are in now - the interface used is 129 the same as for the audio ioctls. 130 -- ioctl cleanups. if a drive couldn't play audio, it didn't get 131 a change to perform device specific ioctls as well. 132 -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities. 133 -- Put in sysctl files for autoclose, autoeject, check_media, debug, 134 and lock. 135 -- /proc/sys/dev/cdrom/info has been updated to also contain info about 136 CD-Rx and DVD capabilities. 137 -- Now default to checking media type. 138 -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for 139 doing this anyway, with the generic_packet addition. 140 141 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk> 142 -- Fix up the sysctl handling so that the option flags get set 143 correctly. 144 -- Fix up ioctl handling so the device specific ones actually get 145 called :). 146 147 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk> 148 -- Fixed volume control on SCSI drives (or others with longer audio 149 page). 150 -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath 151 <andrewtv@usa.net> for telling me and for having defined the various 152 DVD structures and ioctls in the first place! He designed the original 153 DVD patches for ide-cd and while I rearranged and unified them, the 154 interface is still the same. 155 156 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk> 157 -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only 158 CDROMREADTOCENTRY and CDROMREADTOCHDR are left. 159 -- Moved the CDROMREADxxx ioctls in here. 160 -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls 161 and exported functions. 162 -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands 163 to now read GPCMD_ for the new generic packet interface. All low level 164 drivers are updated as well. 165 -- Various other cleanups. 166 167 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk> 168 -- Fixed a couple of possible memory leaks (if an operation failed and 169 we didn't free the buffer before returning the error). 170 -- Integrated Uniform CD Changer handling from Richard Sharman 171 <rsharman@pobox.com>. 172 -- Defined CD_DVD and CD_CHANGER log levels. 173 -- Fixed the CDROMREADxxx ioctls. 174 -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few 175 drives supported it. We lose the index part, however. 176 -- Small modifications to accommodate opens of /dev/hdc1, required 177 for ide-cd to handle multisession discs. 178 -- Export cdrom_mode_sense and cdrom_mode_select. 179 -- init_cdrom_command() for setting up a cgc command. 180 181 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk> 182 -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually 183 impossible to send the drive data in a sensible way. 184 -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and 185 dvd_read_manufact. 186 -- Added setup of write mode for packet writing. 187 -- Fixed CDDA ripping with cdda2wav - accept much larger requests of 188 number of frames and split the reads in blocks of 8. 189 190 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk> 191 -- Added support for changing the region of DVD drives. 192 -- Added sense data to generic command. 193 194 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de> 195 -- Do same "read header length" trick in cdrom_get_disc_info() as 196 we do in cdrom_get_track_info() -- some drive don't obey specs and 197 fail if they can't supply the full Mt Fuji size table. 198 -- Deleted stuff related to setting up write modes. It has a different 199 home now. 200 -- Clear header length in mode_select unconditionally. 201 -- Removed the register_disk() that was added, not needed here. 202 203 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de> 204 -- Fix direction flag in setup_send_key and setup_report_key. This 205 gave some SCSI adapters problems. 206 -- Always return -EROFS for write opens 207 -- Convert to module_init/module_exit style init and remove some 208 of the #ifdef MODULE stuff 209 -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid, 210 DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and 211 dvd_do_auth passed uninitialized data to drive because init_cdrom_command 212 did not clear a 0 sized buffer. 213 214 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de> 215 -- Fix Video-CD on SCSI drives that don't support READ_CD command. In 216 that case switch block size and issue plain READ_10 again, then switch 217 back. 218 219 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de> 220 -- Fix volume control on CD's - old SCSI-II drives now use their own 221 code, as doing MODE6 stuff in here is really not my intention. 222 -- Use READ_DISC_INFO for more reliable end-of-disc. 223 224 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de> 225 -- Fix bug in getting rpc phase 2 region info. 226 -- Reinstate "correct" CDROMPLAYTRKIND 227 228 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de> 229 -- Use quiet bit on packet commands not known to work 230 231 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de> 232 -- Various fixes and lots of cleanups not listed :-) 233 -- Locking fixes 234 -- Mt Rainier support 235 -- DVD-RAM write open fixes 236 237 Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov 238 <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units. 239 240 Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW 241 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se> 242 243 -------------------------------------------------------------------------*/ 244 245 #define REVISION "Revision: 3.20" 246 #define VERSION "Id: cdrom.c 3.20 2003/12/17" 247 248 /* I use an error-log mask to give fine grain control over the type of 249 messages dumped to the system logs. The available masks include: */ 250 #define CD_NOTHING 0x0 251 #define CD_WARNING 0x1 252 #define CD_REG_UNREG 0x2 253 #define CD_DO_IOCTL 0x4 254 #define CD_OPEN 0x8 255 #define CD_CLOSE 0x10 256 #define CD_COUNT_TRACKS 0x20 257 #define CD_CHANGER 0x40 258 #define CD_DVD 0x80 259 260 /* Define this to remove _all_ the debugging messages */ 261 /* #define ERRLOGMASK CD_NOTHING */ 262 #define ERRLOGMASK CD_WARNING 263 /* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 264 /* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 265 266 #include <linux/module.h> 267 #include <linux/fs.h> 268 #include <linux/buffer_head.h> 269 #include <linux/major.h> 270 #include <linux/types.h> 271 #include <linux/errno.h> 272 #include <linux/kernel.h> 273 #include <linux/mm.h> 274 #include <linux/slab.h> 275 #include <linux/cdrom.h> 276 #include <linux/sysctl.h> 277 #include <linux/proc_fs.h> 278 #include <linux/blkpg.h> 279 #include <linux/init.h> 280 #include <linux/fcntl.h> 281 #include <linux/blkdev.h> 282 #include <linux/times.h> 283 284 #include <asm/uaccess.h> 285 286 /* used to tell the module to turn on full debugging messages */ 287 static int debug; 288 /* used to keep tray locked at all times */ 289 static int keeplocked; 290 /* default compatibility mode */ 291 static int autoclose=1; 292 static int autoeject; 293 static int lockdoor = 1; 294 /* will we ever get to use this... sigh. */ 295 static int check_media_type; 296 /* automatically restart mrw format */ 297 static int mrw_format_restart = 1; 298 module_param(debug, bool, 0); 299 module_param(autoclose, bool, 0); 300 module_param(autoeject, bool, 0); 301 module_param(lockdoor, bool, 0); 302 module_param(check_media_type, bool, 0); 303 module_param(mrw_format_restart, bool, 0); 304 305 static DEFINE_MUTEX(cdrom_mutex); 306 307 static const char *mrw_format_status[] = { 308 "not mrw", 309 "bgformat inactive", 310 "bgformat active", 311 "mrw complete", 312 }; 313 314 static const char *mrw_address_space[] = { "DMA", "GAA" }; 315 316 #if (ERRLOGMASK!=CD_NOTHING) 317 #define cdinfo(type, fmt, args...) \ 318 if ((ERRLOGMASK & type) || debug==1 ) \ 319 printk(KERN_INFO "cdrom: " fmt, ## args) 320 #else 321 #define cdinfo(type, fmt, args...) 322 #endif 323 324 /* These are used to simplify getting data in from and back to user land */ 325 #define IOCTL_IN(arg, type, in) \ 326 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \ 327 return -EFAULT; 328 329 #define IOCTL_OUT(arg, type, out) \ 330 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \ 331 return -EFAULT; 332 333 /* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 334 a lot of places. This macro makes the code more clear. */ 335 #define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 336 337 /* used in the audio ioctls */ 338 #define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret 339 340 /* 341 * Another popular OS uses 7 seconds as the hard timeout for default 342 * commands, so it is a good choice for us as well. 343 */ 344 #define CDROM_DEF_TIMEOUT (7 * HZ) 345 346 /* Not-exported routines. */ 347 static int open_for_data(struct cdrom_device_info * cdi); 348 static int check_for_audio_disc(struct cdrom_device_info * cdi, 349 struct cdrom_device_ops * cdo); 350 static void sanitize_format(union cdrom_addr *addr, 351 u_char * curr, u_char requested); 352 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 353 unsigned long arg); 354 355 int cdrom_get_last_written(struct cdrom_device_info *, long *); 356 static int cdrom_get_next_writable(struct cdrom_device_info *, long *); 357 static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*); 358 359 static int cdrom_mrw_exit(struct cdrom_device_info *cdi); 360 361 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); 362 363 #ifdef CONFIG_SYSCTL 364 static void cdrom_sysctl_register(void); 365 #endif /* CONFIG_SYSCTL */ 366 static struct cdrom_device_info *topCdromPtr; 367 368 static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 369 struct packet_command *cgc) 370 { 371 if (cgc->sense) { 372 cgc->sense->sense_key = 0x05; 373 cgc->sense->asc = 0x20; 374 cgc->sense->ascq = 0x00; 375 } 376 377 cgc->stat = -EIO; 378 return -EIO; 379 } 380 381 /* This macro makes sure we don't have to check on cdrom_device_ops 382 * existence in the run-time routines below. Change_capability is a 383 * hack to have the capability flags defined const, while we can still 384 * change it here without gcc complaining at every line. 385 */ 386 #define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits) 387 388 int register_cdrom(struct cdrom_device_info *cdi) 389 { 390 static char banner_printed; 391 struct cdrom_device_ops *cdo = cdi->ops; 392 int *change_capability = (int *)&cdo->capability; /* hack */ 393 394 cdinfo(CD_OPEN, "entering register_cdrom\n"); 395 396 if (cdo->open == NULL || cdo->release == NULL) 397 return -2; 398 if (!banner_printed) { 399 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n"); 400 banner_printed = 1; 401 #ifdef CONFIG_SYSCTL 402 cdrom_sysctl_register(); 403 #endif /* CONFIG_SYSCTL */ 404 } 405 406 ENSURE(drive_status, CDC_DRIVE_STATUS ); 407 ENSURE(media_changed, CDC_MEDIA_CHANGED); 408 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 409 ENSURE(lock_door, CDC_LOCK); 410 ENSURE(select_speed, CDC_SELECT_SPEED); 411 ENSURE(get_last_session, CDC_MULTI_SESSION); 412 ENSURE(get_mcn, CDC_MCN); 413 ENSURE(reset, CDC_RESET); 414 ENSURE(audio_ioctl, CDC_PLAY_AUDIO); 415 ENSURE(generic_packet, CDC_GENERIC_PACKET); 416 cdi->mc_flags = 0; 417 cdo->n_minors = 0; 418 cdi->options = CDO_USE_FFLAGS; 419 420 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY)) 421 cdi->options |= (int) CDO_AUTO_CLOSE; 422 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY)) 423 cdi->options |= (int) CDO_AUTO_EJECT; 424 if (lockdoor==1) 425 cdi->options |= (int) CDO_LOCK; 426 if (check_media_type==1) 427 cdi->options |= (int) CDO_CHECK_TYPE; 428 429 if (CDROM_CAN(CDC_MRW_W)) 430 cdi->exit = cdrom_mrw_exit; 431 432 if (cdi->disk) 433 cdi->cdda_method = CDDA_BPC_FULL; 434 else 435 cdi->cdda_method = CDDA_OLD; 436 437 if (!cdo->generic_packet) 438 cdo->generic_packet = cdrom_dummy_generic_packet; 439 440 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 441 mutex_lock(&cdrom_mutex); 442 cdi->next = topCdromPtr; 443 topCdromPtr = cdi; 444 mutex_unlock(&cdrom_mutex); 445 return 0; 446 } 447 #undef ENSURE 448 449 int unregister_cdrom(struct cdrom_device_info *unreg) 450 { 451 struct cdrom_device_info *cdi, *prev; 452 cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 453 454 prev = NULL; 455 mutex_lock(&cdrom_mutex); 456 cdi = topCdromPtr; 457 while (cdi && cdi != unreg) { 458 prev = cdi; 459 cdi = cdi->next; 460 } 461 462 if (cdi == NULL) { 463 mutex_unlock(&cdrom_mutex); 464 return -2; 465 } 466 if (prev) 467 prev->next = cdi->next; 468 else 469 topCdromPtr = cdi->next; 470 471 mutex_unlock(&cdrom_mutex); 472 473 if (cdi->exit) 474 cdi->exit(cdi); 475 476 cdi->ops->n_minors--; 477 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 478 return 0; 479 } 480 481 int cdrom_get_media_event(struct cdrom_device_info *cdi, 482 struct media_event_desc *med) 483 { 484 struct packet_command cgc; 485 unsigned char buffer[8]; 486 struct event_header *eh = (struct event_header *) buffer; 487 488 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 489 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 490 cgc.cmd[1] = 1; /* IMMED */ 491 cgc.cmd[4] = 1 << 4; /* media event */ 492 cgc.cmd[8] = sizeof(buffer); 493 cgc.quiet = 1; 494 495 if (cdi->ops->generic_packet(cdi, &cgc)) 496 return 1; 497 498 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 499 return 1; 500 501 if (eh->nea || eh->notification_class != 0x4) 502 return 1; 503 504 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 505 return 0; 506 } 507 508 /* 509 * the first prototypes used 0x2c as the page code for the mrw mode page, 510 * subsequently this was changed to 0x03. probe the one used by this drive 511 */ 512 static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 513 { 514 struct packet_command cgc; 515 char buffer[16]; 516 517 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 518 519 cgc.timeout = HZ; 520 cgc.quiet = 1; 521 522 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 523 cdi->mrw_mode_page = MRW_MODE_PC; 524 return 0; 525 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 526 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 527 return 0; 528 } 529 530 return 1; 531 } 532 533 static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 534 { 535 struct packet_command cgc; 536 struct mrw_feature_desc *mfd; 537 unsigned char buffer[16]; 538 int ret; 539 540 *write = 0; 541 542 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 543 544 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 545 cgc.cmd[3] = CDF_MRW; 546 cgc.cmd[8] = sizeof(buffer); 547 cgc.quiet = 1; 548 549 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 550 return ret; 551 552 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 553 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 554 return 1; 555 *write = mfd->write; 556 557 if ((ret = cdrom_mrw_probe_pc(cdi))) { 558 *write = 0; 559 return ret; 560 } 561 562 return 0; 563 } 564 565 static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 566 { 567 struct packet_command cgc; 568 unsigned char buffer[12]; 569 int ret; 570 571 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : ""); 572 573 /* 574 * FmtData bit set (bit 4), format type is 1 575 */ 576 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 577 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 578 cgc.cmd[1] = (1 << 4) | 1; 579 580 cgc.timeout = 5 * 60 * HZ; 581 582 /* 583 * 4 byte format list header, 8 byte format list descriptor 584 */ 585 buffer[1] = 1 << 1; 586 buffer[3] = 8; 587 588 /* 589 * nr_blocks field 590 */ 591 buffer[4] = 0xff; 592 buffer[5] = 0xff; 593 buffer[6] = 0xff; 594 buffer[7] = 0xff; 595 596 buffer[8] = 0x24 << 2; 597 buffer[11] = cont; 598 599 ret = cdi->ops->generic_packet(cdi, &cgc); 600 if (ret) 601 printk(KERN_INFO "cdrom: bgformat failed\n"); 602 603 return ret; 604 } 605 606 static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 607 { 608 struct packet_command cgc; 609 610 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 611 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 612 613 /* 614 * Session = 1, Track = 0 615 */ 616 cgc.cmd[1] = !!immed; 617 cgc.cmd[2] = 1 << 1; 618 619 cgc.timeout = 5 * 60 * HZ; 620 621 return cdi->ops->generic_packet(cdi, &cgc); 622 } 623 624 static int cdrom_flush_cache(struct cdrom_device_info *cdi) 625 { 626 struct packet_command cgc; 627 628 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 629 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 630 631 cgc.timeout = 5 * 60 * HZ; 632 633 return cdi->ops->generic_packet(cdi, &cgc); 634 } 635 636 static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 637 { 638 disc_information di; 639 int ret; 640 641 ret = cdrom_get_disc_info(cdi, &di); 642 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 643 return 1; 644 645 ret = 0; 646 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 647 printk(KERN_INFO "cdrom: issuing MRW back ground " 648 "format suspend\n"); 649 ret = cdrom_mrw_bgformat_susp(cdi, 0); 650 } 651 652 if (!ret && cdi->media_written) 653 ret = cdrom_flush_cache(cdi); 654 655 return ret; 656 } 657 658 static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 659 { 660 struct packet_command cgc; 661 struct mode_page_header *mph; 662 char buffer[16]; 663 int ret, offset, size; 664 665 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 666 667 cgc.buffer = buffer; 668 cgc.buflen = sizeof(buffer); 669 670 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0))) 671 return ret; 672 673 mph = (struct mode_page_header *) buffer; 674 offset = be16_to_cpu(mph->desc_length); 675 size = be16_to_cpu(mph->mode_data_length) + 2; 676 677 buffer[offset + 3] = space; 678 cgc.buflen = size; 679 680 if ((ret = cdrom_mode_select(cdi, &cgc))) 681 return ret; 682 683 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]); 684 return 0; 685 } 686 687 static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 688 struct rwrt_feature_desc *rfd) 689 { 690 struct packet_command cgc; 691 char buffer[24]; 692 int ret; 693 694 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 695 696 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 697 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 698 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 699 cgc.quiet = 1; 700 701 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 702 return ret; 703 704 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 705 return 0; 706 } 707 708 static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 709 { 710 struct packet_command cgc; 711 char buffer[16]; 712 __be16 *feature_code; 713 int ret; 714 715 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 716 717 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 718 cgc.cmd[3] = CDF_HWDM; 719 cgc.cmd[8] = sizeof(buffer); 720 cgc.quiet = 1; 721 722 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 723 return ret; 724 725 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 726 if (be16_to_cpu(*feature_code) == CDF_HWDM) 727 return 0; 728 729 return 1; 730 } 731 732 733 static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 734 { 735 struct rwrt_feature_desc rfd; 736 int ret; 737 738 *write = 0; 739 740 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 741 return ret; 742 743 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 744 *write = 1; 745 746 return 0; 747 } 748 749 static int cdrom_media_erasable(struct cdrom_device_info *cdi) 750 { 751 disc_information di; 752 int ret; 753 754 ret = cdrom_get_disc_info(cdi, &di); 755 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 756 return -1; 757 758 return di.erasable; 759 } 760 761 /* 762 * FIXME: check RO bit 763 */ 764 static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 765 { 766 int ret = cdrom_media_erasable(cdi); 767 768 /* 769 * allow writable open if media info read worked and media is 770 * erasable, _or_ if it fails since not all drives support it 771 */ 772 if (!ret) 773 return 1; 774 775 return 0; 776 } 777 778 static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 779 { 780 disc_information di; 781 int ret; 782 783 /* 784 * always reset to DMA lba space on open 785 */ 786 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 787 printk(KERN_ERR "cdrom: failed setting lba address space\n"); 788 return 1; 789 } 790 791 ret = cdrom_get_disc_info(cdi, &di); 792 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 793 return 1; 794 795 if (!di.erasable) 796 return 1; 797 798 /* 799 * mrw_status 800 * 0 - not MRW formatted 801 * 1 - MRW bgformat started, but not running or complete 802 * 2 - MRW bgformat in progress 803 * 3 - MRW formatting complete 804 */ 805 ret = 0; 806 printk(KERN_INFO "cdrom open: mrw_status '%s'\n", 807 mrw_format_status[di.mrw_status]); 808 if (!di.mrw_status) 809 ret = 1; 810 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 811 mrw_format_restart) 812 ret = cdrom_mrw_bgformat(cdi, 1); 813 814 return ret; 815 } 816 817 static int mo_open_write(struct cdrom_device_info *cdi) 818 { 819 struct packet_command cgc; 820 char buffer[255]; 821 int ret; 822 823 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 824 cgc.quiet = 1; 825 826 /* 827 * obtain write protect information as per 828 * drivers/scsi/sd.c:sd_read_write_protect_flag 829 */ 830 831 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 832 if (ret) 833 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 834 if (ret) { 835 cgc.buflen = 255; 836 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 837 } 838 839 /* drive gave us no info, let the user go ahead */ 840 if (ret) 841 return 0; 842 843 return buffer[3] & 0x80; 844 } 845 846 static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 847 { 848 struct rwrt_feature_desc rfd; 849 int ret; 850 851 if ((ret = cdrom_has_defect_mgt(cdi))) 852 return ret; 853 854 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 855 return ret; 856 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 857 ret = !rfd.curr; 858 859 cdinfo(CD_OPEN, "can open for random write\n"); 860 return ret; 861 } 862 863 static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 864 { 865 struct packet_command cgc; 866 char buffer[32]; 867 int ret, mmc3_profile; 868 869 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 870 871 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 872 cgc.cmd[1] = 0; 873 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 874 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 875 cgc.quiet = 1; 876 877 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 878 mmc3_profile = 0xffff; 879 else 880 mmc3_profile = (buffer[6] << 8) | buffer[7]; 881 882 cdi->mmc3_profile = mmc3_profile; 883 } 884 885 static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 886 { 887 switch (cdi->mmc3_profile) { 888 case 0x12: /* DVD-RAM */ 889 case 0x1A: /* DVD+RW */ 890 return 0; 891 default: 892 return 1; 893 } 894 } 895 896 /* 897 * returns 0 for ok to open write, non-0 to disallow 898 */ 899 static int cdrom_open_write(struct cdrom_device_info *cdi) 900 { 901 int mrw, mrw_write, ram_write; 902 int ret = 1; 903 904 mrw = 0; 905 if (!cdrom_is_mrw(cdi, &mrw_write)) 906 mrw = 1; 907 908 if (CDROM_CAN(CDC_MO_DRIVE)) 909 ram_write = 1; 910 else 911 (void) cdrom_is_random_writable(cdi, &ram_write); 912 913 if (mrw) 914 cdi->mask &= ~CDC_MRW; 915 else 916 cdi->mask |= CDC_MRW; 917 918 if (mrw_write) 919 cdi->mask &= ~CDC_MRW_W; 920 else 921 cdi->mask |= CDC_MRW_W; 922 923 if (ram_write) 924 cdi->mask &= ~CDC_RAM; 925 else 926 cdi->mask |= CDC_RAM; 927 928 if (CDROM_CAN(CDC_MRW_W)) 929 ret = cdrom_mrw_open_write(cdi); 930 else if (CDROM_CAN(CDC_DVD_RAM)) 931 ret = cdrom_dvdram_open_write(cdi); 932 else if (CDROM_CAN(CDC_RAM) && 933 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 934 ret = cdrom_ram_open_write(cdi); 935 else if (CDROM_CAN(CDC_MO_DRIVE)) 936 ret = mo_open_write(cdi); 937 else if (!cdrom_is_dvd_rw(cdi)) 938 ret = 0; 939 940 return ret; 941 } 942 943 static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 944 { 945 struct packet_command cgc; 946 947 if (cdi->mmc3_profile != 0x1a) { 948 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 949 return; 950 } 951 952 if (!cdi->media_written) { 953 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 954 return; 955 } 956 957 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n", 958 cdi->name); 959 960 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 961 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 962 cgc.timeout = 30*HZ; 963 cdi->ops->generic_packet(cdi, &cgc); 964 965 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 966 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 967 cgc.timeout = 3000*HZ; 968 cgc.quiet = 1; 969 cdi->ops->generic_packet(cdi, &cgc); 970 971 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 972 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 973 cgc.cmd[2] = 2; /* Close session */ 974 cgc.quiet = 1; 975 cgc.timeout = 3000*HZ; 976 cdi->ops->generic_packet(cdi, &cgc); 977 978 cdi->media_written = 0; 979 } 980 981 static int cdrom_close_write(struct cdrom_device_info *cdi) 982 { 983 #if 0 984 return cdrom_flush_cache(cdi); 985 #else 986 return 0; 987 #endif 988 } 989 990 /* We use the open-option O_NONBLOCK to indicate that the 991 * purpose of opening is only for subsequent ioctl() calls; no device 992 * integrity checks are performed. 993 * 994 * We hope that all cd-player programs will adopt this convention. It 995 * is in their own interest: device control becomes a lot easier 996 * this way. 997 */ 998 int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 999 { 1000 int ret; 1001 1002 cdinfo(CD_OPEN, "entering cdrom_open\n"); 1003 1004 /* if this was a O_NONBLOCK open and we should honor the flags, 1005 * do a quick open without drive/disc integrity checks. */ 1006 cdi->use_count++; 1007 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) { 1008 ret = cdi->ops->open(cdi, 1); 1009 } else { 1010 ret = open_for_data(cdi); 1011 if (ret) 1012 goto err; 1013 cdrom_mmc3_profile(cdi); 1014 if (fp->f_mode & FMODE_WRITE) { 1015 ret = -EROFS; 1016 if (cdrom_open_write(cdi)) 1017 goto err_release; 1018 if (!CDROM_CAN(CDC_RAM)) 1019 goto err_release; 1020 ret = 0; 1021 cdi->media_written = 0; 1022 } 1023 } 1024 1025 if (ret) 1026 goto err; 1027 1028 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1029 cdi->name, cdi->use_count); 1030 /* Do this on open. Don't wait for mount, because they might 1031 not be mounting, but opening with O_NONBLOCK */ 1032 check_disk_change(ip->i_bdev); 1033 return 0; 1034 err_release: 1035 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1036 cdi->ops->lock_door(cdi, 0); 1037 cdinfo(CD_OPEN, "door unlocked.\n"); 1038 } 1039 cdi->ops->release(cdi); 1040 err: 1041 cdi->use_count--; 1042 return ret; 1043 } 1044 1045 static 1046 int open_for_data(struct cdrom_device_info * cdi) 1047 { 1048 int ret; 1049 struct cdrom_device_ops *cdo = cdi->ops; 1050 tracktype tracks; 1051 cdinfo(CD_OPEN, "entering open_for_data\n"); 1052 /* Check if the driver can report drive status. If it can, we 1053 can do clever things. If it can't, well, we at least tried! */ 1054 if (cdo->drive_status != NULL) { 1055 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1056 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1057 if (ret == CDS_TRAY_OPEN) { 1058 cdinfo(CD_OPEN, "the tray is open...\n"); 1059 /* can/may i close it? */ 1060 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1061 cdi->options & CDO_AUTO_CLOSE) { 1062 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1063 ret=cdo->tray_move(cdi,0); 1064 if (ret) { 1065 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1066 /* Ignore the error from the low 1067 level driver. We don't care why it 1068 couldn't close the tray. We only care 1069 that there is no disc in the drive, 1070 since that is the _REAL_ problem here.*/ 1071 ret=-ENOMEDIUM; 1072 goto clean_up_and_return; 1073 } 1074 } else { 1075 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1076 ret=-ENOMEDIUM; 1077 goto clean_up_and_return; 1078 } 1079 /* Ok, the door should be closed now.. Check again */ 1080 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1081 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1082 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1083 cdinfo(CD_OPEN, "tray might not contain a medium.\n"); 1084 ret=-ENOMEDIUM; 1085 goto clean_up_and_return; 1086 } 1087 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1088 } 1089 /* the door should be closed now, check for the disc */ 1090 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1091 if (ret!=CDS_DISC_OK) { 1092 ret = -ENOMEDIUM; 1093 goto clean_up_and_return; 1094 } 1095 } 1096 cdrom_count_tracks(cdi, &tracks); 1097 if (tracks.error == CDS_NO_DISC) { 1098 cdinfo(CD_OPEN, "bummer. no disc.\n"); 1099 ret=-ENOMEDIUM; 1100 goto clean_up_and_return; 1101 } 1102 /* CD-Players which don't use O_NONBLOCK, workman 1103 * for example, need bit CDO_CHECK_TYPE cleared! */ 1104 if (tracks.data==0) { 1105 if (cdi->options & CDO_CHECK_TYPE) { 1106 /* give people a warning shot, now that CDO_CHECK_TYPE 1107 is the default case! */ 1108 cdinfo(CD_OPEN, "bummer. wrong media type.\n"); 1109 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1110 (unsigned int)task_pid_nr(current)); 1111 ret=-EMEDIUMTYPE; 1112 goto clean_up_and_return; 1113 } 1114 else { 1115 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n"); 1116 } 1117 } 1118 1119 cdinfo(CD_OPEN, "all seems well, opening the device.\n"); 1120 1121 /* all seems well, we can open the device */ 1122 ret = cdo->open(cdi, 0); /* open for data */ 1123 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret); 1124 /* After all this careful checking, we shouldn't have problems 1125 opening the device, but we don't want the device locked if 1126 this somehow fails... */ 1127 if (ret) { 1128 cdinfo(CD_OPEN, "open device failed.\n"); 1129 goto clean_up_and_return; 1130 } 1131 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1132 cdo->lock_door(cdi, 1); 1133 cdinfo(CD_OPEN, "door locked.\n"); 1134 } 1135 cdinfo(CD_OPEN, "device opened successfully.\n"); 1136 return ret; 1137 1138 /* Something failed. Try to unlock the drive, because some drivers 1139 (notably ide-cd) lock the drive after every command. This produced 1140 a nasty bug where after mount failed, the drive would remain locked! 1141 This ensures that the drive gets unlocked after a mount fails. This 1142 is a goto to avoid bloating the driver with redundant code. */ 1143 clean_up_and_return: 1144 cdinfo(CD_OPEN, "open failed.\n"); 1145 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1146 cdo->lock_door(cdi, 0); 1147 cdinfo(CD_OPEN, "door unlocked.\n"); 1148 } 1149 return ret; 1150 } 1151 1152 /* This code is similar to that in open_for_data. The routine is called 1153 whenever an audio play operation is requested. 1154 */ 1155 int check_for_audio_disc(struct cdrom_device_info * cdi, 1156 struct cdrom_device_ops * cdo) 1157 { 1158 int ret; 1159 tracktype tracks; 1160 cdinfo(CD_OPEN, "entering check_for_audio_disc\n"); 1161 if (!(cdi->options & CDO_CHECK_TYPE)) 1162 return 0; 1163 if (cdo->drive_status != NULL) { 1164 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1165 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1166 if (ret == CDS_TRAY_OPEN) { 1167 cdinfo(CD_OPEN, "the tray is open...\n"); 1168 /* can/may i close it? */ 1169 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1170 cdi->options & CDO_AUTO_CLOSE) { 1171 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1172 ret=cdo->tray_move(cdi,0); 1173 if (ret) { 1174 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1175 /* Ignore the error from the low 1176 level driver. We don't care why it 1177 couldn't close the tray. We only care 1178 that there is no disc in the drive, 1179 since that is the _REAL_ problem here.*/ 1180 return -ENOMEDIUM; 1181 } 1182 } else { 1183 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1184 return -ENOMEDIUM; 1185 } 1186 /* Ok, the door should be closed now.. Check again */ 1187 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1188 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1189 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1190 return -ENOMEDIUM; 1191 } 1192 if (ret!=CDS_DISC_OK) { 1193 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n"); 1194 return -EIO; 1195 } 1196 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1197 } 1198 } 1199 cdrom_count_tracks(cdi, &tracks); 1200 if (tracks.error) 1201 return(tracks.error); 1202 1203 if (tracks.audio==0) 1204 return -EMEDIUMTYPE; 1205 1206 return 0; 1207 } 1208 1209 int cdrom_release(struct cdrom_device_info *cdi, struct file *fp) 1210 { 1211 struct cdrom_device_ops *cdo = cdi->ops; 1212 int opened_for_data; 1213 1214 cdinfo(CD_CLOSE, "entering cdrom_release\n"); 1215 1216 if (cdi->use_count > 0) 1217 cdi->use_count--; 1218 1219 if (cdi->use_count == 0) { 1220 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name); 1221 cdrom_dvd_rw_close_write(cdi); 1222 1223 if ((cdo->capability & CDC_LOCK) && !keeplocked) { 1224 cdinfo(CD_CLOSE, "Unlocking door!\n"); 1225 cdo->lock_door(cdi, 0); 1226 } 1227 } 1228 1229 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1230 !(fp && fp->f_flags & O_NONBLOCK); 1231 1232 /* 1233 * flush cache on last write release 1234 */ 1235 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1236 cdrom_close_write(cdi); 1237 1238 cdo->release(cdi); 1239 if (cdi->use_count == 0) { /* last process that closes dev*/ 1240 if (opened_for_data && 1241 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1242 cdo->tray_move(cdi, 1); 1243 } 1244 return 0; 1245 } 1246 1247 static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1248 struct cdrom_changer_info *buf) 1249 { 1250 struct packet_command cgc; 1251 struct cdrom_device_ops *cdo = cdi->ops; 1252 int length; 1253 1254 /* 1255 * Sanyo changer isn't spec compliant (doesn't use regular change 1256 * LOAD_UNLOAD command, and it doesn't implement the mech status 1257 * command below 1258 */ 1259 if (cdi->sanyo_slot) { 1260 buf->hdr.nslots = 3; 1261 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1262 for (length = 0; length < 3; length++) { 1263 buf->slots[length].disc_present = 1; 1264 buf->slots[length].change = 0; 1265 } 1266 return 0; 1267 } 1268 1269 length = sizeof(struct cdrom_mechstat_header) + 1270 cdi->capacity * sizeof(struct cdrom_slot); 1271 1272 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1273 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1274 cgc.cmd[8] = (length >> 8) & 0xff; 1275 cgc.cmd[9] = length & 0xff; 1276 return cdo->generic_packet(cdi, &cgc); 1277 } 1278 1279 static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1280 { 1281 struct cdrom_changer_info *info; 1282 int ret; 1283 1284 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 1285 if (cdi->sanyo_slot) 1286 return CDS_NO_INFO; 1287 1288 info = kmalloc(sizeof(*info), GFP_KERNEL); 1289 if (!info) 1290 return -ENOMEM; 1291 1292 if ((ret = cdrom_read_mech_status(cdi, info))) 1293 goto out_free; 1294 1295 if (info->slots[slot].disc_present) 1296 ret = CDS_DISC_OK; 1297 else 1298 ret = CDS_NO_DISC; 1299 1300 out_free: 1301 kfree(info); 1302 return ret; 1303 } 1304 1305 /* Return the number of slots for an ATAPI/SCSI cdrom, 1306 * return 1 if not a changer. 1307 */ 1308 int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1309 { 1310 int status; 1311 int nslots = 1; 1312 struct cdrom_changer_info *info; 1313 1314 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1315 /* cdrom_read_mech_status requires a valid value for capacity: */ 1316 cdi->capacity = 0; 1317 1318 info = kmalloc(sizeof(*info), GFP_KERNEL); 1319 if (!info) 1320 return -ENOMEM; 1321 1322 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1323 nslots = info->hdr.nslots; 1324 1325 kfree(info); 1326 return nslots; 1327 } 1328 1329 1330 /* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1331 static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1332 { 1333 struct packet_command cgc; 1334 1335 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n"); 1336 if (cdi->sanyo_slot && slot < 0) 1337 return 0; 1338 1339 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1340 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1341 cgc.cmd[4] = 2 + (slot >= 0); 1342 cgc.cmd[8] = slot; 1343 cgc.timeout = 60 * HZ; 1344 1345 /* The Sanyo 3 CD changer uses byte 7 of the 1346 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1347 using the GPCMD_LOAD_UNLOAD opcode. */ 1348 if (cdi->sanyo_slot && -1 < slot) { 1349 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1350 cgc.cmd[7] = slot; 1351 cgc.cmd[4] = cgc.cmd[8] = 0; 1352 cdi->sanyo_slot = slot ? slot : 3; 1353 } 1354 1355 return cdi->ops->generic_packet(cdi, &cgc); 1356 } 1357 1358 static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1359 { 1360 struct cdrom_changer_info *info; 1361 int curslot; 1362 int ret; 1363 1364 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n"); 1365 if (!CDROM_CAN(CDC_SELECT_DISC)) 1366 return -EDRIVE_CANT_DO_THIS; 1367 1368 (void) cdi->ops->media_changed(cdi, slot); 1369 1370 if (slot == CDSL_NONE) { 1371 /* set media changed bits, on both queues */ 1372 cdi->mc_flags = 0x3; 1373 return cdrom_load_unload(cdi, -1); 1374 } 1375 1376 info = kmalloc(sizeof(*info), GFP_KERNEL); 1377 if (!info) 1378 return -ENOMEM; 1379 1380 if ((ret = cdrom_read_mech_status(cdi, info))) { 1381 kfree(info); 1382 return ret; 1383 } 1384 1385 curslot = info->hdr.curslot; 1386 kfree(info); 1387 1388 if (cdi->use_count > 1 || keeplocked) { 1389 if (slot == CDSL_CURRENT) { 1390 return curslot; 1391 } else { 1392 return -EBUSY; 1393 } 1394 } 1395 1396 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1397 which is useful if it had been previously unloaded. 1398 Whether it can or not, it returns the current slot. 1399 Similarly, if slot happens to be the current one, we still 1400 try and load it. */ 1401 if (slot == CDSL_CURRENT) 1402 slot = curslot; 1403 1404 /* set media changed bits on both queues */ 1405 cdi->mc_flags = 0x3; 1406 if ((ret = cdrom_load_unload(cdi, slot))) 1407 return ret; 1408 1409 return slot; 1410 } 1411 1412 /* We want to make media_changed accessible to the user through an 1413 * ioctl. The main problem now is that we must double-buffer the 1414 * low-level implementation, to assure that the VFS and the user both 1415 * see a medium change once. 1416 */ 1417 1418 static 1419 int media_changed(struct cdrom_device_info *cdi, int queue) 1420 { 1421 unsigned int mask = (1 << (queue & 1)); 1422 int ret = !!(cdi->mc_flags & mask); 1423 1424 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1425 return ret; 1426 /* changed since last call? */ 1427 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) { 1428 cdi->mc_flags = 0x3; /* set bit on both queues */ 1429 ret |= 1; 1430 cdi->media_written = 0; 1431 } 1432 cdi->mc_flags &= ~mask; /* clear bit */ 1433 return ret; 1434 } 1435 1436 int cdrom_media_changed(struct cdrom_device_info *cdi) 1437 { 1438 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1439 * Returning "0" is always safe (media hasn't been changed). Do that 1440 * if the low-level cdrom driver dosn't support media changed. */ 1441 if (cdi == NULL || cdi->ops->media_changed == NULL) 1442 return 0; 1443 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1444 return 0; 1445 return media_changed(cdi, 0); 1446 } 1447 1448 /* badly broken, I know. Is due for a fixup anytime. */ 1449 static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks) 1450 { 1451 struct cdrom_tochdr header; 1452 struct cdrom_tocentry entry; 1453 int ret, i; 1454 tracks->data=0; 1455 tracks->audio=0; 1456 tracks->cdi=0; 1457 tracks->xa=0; 1458 tracks->error=0; 1459 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1460 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1461 tracks->error=CDS_NO_INFO; 1462 return; 1463 } 1464 /* Grab the TOC header so we can see how many tracks there are */ 1465 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) { 1466 if (ret == -ENOMEDIUM) 1467 tracks->error = CDS_NO_DISC; 1468 else 1469 tracks->error = CDS_NO_INFO; 1470 return; 1471 } 1472 /* check what type of tracks are on this disc */ 1473 entry.cdte_format = CDROM_MSF; 1474 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1475 entry.cdte_track = i; 1476 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1477 tracks->error=CDS_NO_INFO; 1478 return; 1479 } 1480 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1481 if (entry.cdte_format == 0x10) 1482 tracks->cdi++; 1483 else if (entry.cdte_format == 0x20) 1484 tracks->xa++; 1485 else 1486 tracks->data++; 1487 } else 1488 tracks->audio++; 1489 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1490 i, entry.cdte_format, entry.cdte_ctrl); 1491 } 1492 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1493 header.cdth_trk1, tracks->audio, tracks->data, 1494 tracks->cdi, tracks->xa); 1495 } 1496 1497 /* Requests to the low-level drivers will /always/ be done in the 1498 following format convention: 1499 1500 CDROM_LBA: all data-related requests. 1501 CDROM_MSF: all audio-related requests. 1502 1503 However, a low-level implementation is allowed to refuse this 1504 request, and return information in its own favorite format. 1505 1506 It doesn't make sense /at all/ to ask for a play_audio in LBA 1507 format, or ask for multi-session info in MSF format. However, for 1508 backward compatibility these format requests will be satisfied, but 1509 the requests to the low-level drivers will be sanitized in the more 1510 meaningful format indicated above. 1511 */ 1512 1513 static 1514 void sanitize_format(union cdrom_addr *addr, 1515 u_char * curr, u_char requested) 1516 { 1517 if (*curr == requested) 1518 return; /* nothing to be done! */ 1519 if (requested == CDROM_LBA) { 1520 addr->lba = (int) addr->msf.frame + 1521 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1522 } else { /* CDROM_MSF */ 1523 int lba = addr->lba; 1524 addr->msf.frame = lba % 75; 1525 lba /= 75; 1526 lba += 2; 1527 addr->msf.second = lba % 60; 1528 addr->msf.minute = lba / 60; 1529 } 1530 *curr = requested; 1531 } 1532 1533 void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1534 int type) 1535 { 1536 memset(cgc, 0, sizeof(struct packet_command)); 1537 if (buf) 1538 memset(buf, 0, len); 1539 cgc->buffer = (char *) buf; 1540 cgc->buflen = len; 1541 cgc->data_direction = type; 1542 cgc->timeout = CDROM_DEF_TIMEOUT; 1543 } 1544 1545 /* DVD handling */ 1546 1547 #define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1548 #define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1549 1550 static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1551 { 1552 cgc->cmd[0] = GPCMD_REPORT_KEY; 1553 cgc->cmd[10] = type | (agid << 6); 1554 switch (type) { 1555 case 0: case 8: case 5: { 1556 cgc->buflen = 8; 1557 break; 1558 } 1559 case 1: { 1560 cgc->buflen = 16; 1561 break; 1562 } 1563 case 2: case 4: { 1564 cgc->buflen = 12; 1565 break; 1566 } 1567 } 1568 cgc->cmd[9] = cgc->buflen; 1569 cgc->data_direction = CGC_DATA_READ; 1570 } 1571 1572 static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1573 { 1574 cgc->cmd[0] = GPCMD_SEND_KEY; 1575 cgc->cmd[10] = type | (agid << 6); 1576 switch (type) { 1577 case 1: { 1578 cgc->buflen = 16; 1579 break; 1580 } 1581 case 3: { 1582 cgc->buflen = 12; 1583 break; 1584 } 1585 case 6: { 1586 cgc->buflen = 8; 1587 break; 1588 } 1589 } 1590 cgc->cmd[9] = cgc->buflen; 1591 cgc->data_direction = CGC_DATA_WRITE; 1592 } 1593 1594 static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1595 { 1596 int ret; 1597 u_char buf[20]; 1598 struct packet_command cgc; 1599 struct cdrom_device_ops *cdo = cdi->ops; 1600 rpc_state_t rpc_state; 1601 1602 memset(buf, 0, sizeof(buf)); 1603 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1604 1605 switch (ai->type) { 1606 /* LU data send */ 1607 case DVD_LU_SEND_AGID: 1608 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1609 cgc.quiet = 1; 1610 setup_report_key(&cgc, ai->lsa.agid, 0); 1611 1612 if ((ret = cdo->generic_packet(cdi, &cgc))) 1613 return ret; 1614 1615 ai->lsa.agid = buf[7] >> 6; 1616 /* Returning data, let host change state */ 1617 break; 1618 1619 case DVD_LU_SEND_KEY1: 1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1621 setup_report_key(&cgc, ai->lsk.agid, 2); 1622 1623 if ((ret = cdo->generic_packet(cdi, &cgc))) 1624 return ret; 1625 1626 copy_key(ai->lsk.key, &buf[4]); 1627 /* Returning data, let host change state */ 1628 break; 1629 1630 case DVD_LU_SEND_CHALLENGE: 1631 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1632 setup_report_key(&cgc, ai->lsc.agid, 1); 1633 1634 if ((ret = cdo->generic_packet(cdi, &cgc))) 1635 return ret; 1636 1637 copy_chal(ai->lsc.chal, &buf[4]); 1638 /* Returning data, let host change state */ 1639 break; 1640 1641 /* Post-auth key */ 1642 case DVD_LU_SEND_TITLE_KEY: 1643 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1644 cgc.quiet = 1; 1645 setup_report_key(&cgc, ai->lstk.agid, 4); 1646 cgc.cmd[5] = ai->lstk.lba; 1647 cgc.cmd[4] = ai->lstk.lba >> 8; 1648 cgc.cmd[3] = ai->lstk.lba >> 16; 1649 cgc.cmd[2] = ai->lstk.lba >> 24; 1650 1651 if ((ret = cdo->generic_packet(cdi, &cgc))) 1652 return ret; 1653 1654 ai->lstk.cpm = (buf[4] >> 7) & 1; 1655 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1656 ai->lstk.cgms = (buf[4] >> 4) & 3; 1657 copy_key(ai->lstk.title_key, &buf[5]); 1658 /* Returning data, let host change state */ 1659 break; 1660 1661 case DVD_LU_SEND_ASF: 1662 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1663 setup_report_key(&cgc, ai->lsasf.agid, 5); 1664 1665 if ((ret = cdo->generic_packet(cdi, &cgc))) 1666 return ret; 1667 1668 ai->lsasf.asf = buf[7] & 1; 1669 break; 1670 1671 /* LU data receive (LU changes state) */ 1672 case DVD_HOST_SEND_CHALLENGE: 1673 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1674 setup_send_key(&cgc, ai->hsc.agid, 1); 1675 buf[1] = 0xe; 1676 copy_chal(&buf[4], ai->hsc.chal); 1677 1678 if ((ret = cdo->generic_packet(cdi, &cgc))) 1679 return ret; 1680 1681 ai->type = DVD_LU_SEND_KEY1; 1682 break; 1683 1684 case DVD_HOST_SEND_KEY2: 1685 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1686 setup_send_key(&cgc, ai->hsk.agid, 3); 1687 buf[1] = 0xa; 1688 copy_key(&buf[4], ai->hsk.key); 1689 1690 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1691 ai->type = DVD_AUTH_FAILURE; 1692 return ret; 1693 } 1694 ai->type = DVD_AUTH_ESTABLISHED; 1695 break; 1696 1697 /* Misc */ 1698 case DVD_INVALIDATE_AGID: 1699 cgc.quiet = 1; 1700 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1701 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1702 if ((ret = cdo->generic_packet(cdi, &cgc))) 1703 return ret; 1704 break; 1705 1706 /* Get region settings */ 1707 case DVD_LU_SEND_RPC_STATE: 1708 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1709 setup_report_key(&cgc, 0, 8); 1710 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1711 cgc.buffer = (char *) &rpc_state; 1712 1713 if ((ret = cdo->generic_packet(cdi, &cgc))) 1714 return ret; 1715 1716 ai->lrpcs.type = rpc_state.type_code; 1717 ai->lrpcs.vra = rpc_state.vra; 1718 ai->lrpcs.ucca = rpc_state.ucca; 1719 ai->lrpcs.region_mask = rpc_state.region_mask; 1720 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1721 break; 1722 1723 /* Set region settings */ 1724 case DVD_HOST_SEND_RPC_STATE: 1725 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1726 setup_send_key(&cgc, 0, 6); 1727 buf[1] = 6; 1728 buf[4] = ai->hrpcs.pdrc; 1729 1730 if ((ret = cdo->generic_packet(cdi, &cgc))) 1731 return ret; 1732 break; 1733 1734 default: 1735 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1736 return -ENOTTY; 1737 } 1738 1739 return 0; 1740 } 1741 1742 static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s) 1743 { 1744 unsigned char buf[21], *base; 1745 struct dvd_layer *layer; 1746 struct packet_command cgc; 1747 struct cdrom_device_ops *cdo = cdi->ops; 1748 int ret, layer_num = s->physical.layer_num; 1749 1750 if (layer_num >= DVD_LAYERS) 1751 return -EINVAL; 1752 1753 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1754 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1755 cgc.cmd[6] = layer_num; 1756 cgc.cmd[7] = s->type; 1757 cgc.cmd[9] = cgc.buflen & 0xff; 1758 1759 /* 1760 * refrain from reporting errors on non-existing layers (mainly) 1761 */ 1762 cgc.quiet = 1; 1763 1764 if ((ret = cdo->generic_packet(cdi, &cgc))) 1765 return ret; 1766 1767 base = &buf[4]; 1768 layer = &s->physical.layer[layer_num]; 1769 1770 /* 1771 * place the data... really ugly, but at least we won't have to 1772 * worry about endianess in userspace. 1773 */ 1774 memset(layer, 0, sizeof(*layer)); 1775 layer->book_version = base[0] & 0xf; 1776 layer->book_type = base[0] >> 4; 1777 layer->min_rate = base[1] & 0xf; 1778 layer->disc_size = base[1] >> 4; 1779 layer->layer_type = base[2] & 0xf; 1780 layer->track_path = (base[2] >> 4) & 1; 1781 layer->nlayers = (base[2] >> 5) & 3; 1782 layer->track_density = base[3] & 0xf; 1783 layer->linear_density = base[3] >> 4; 1784 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1785 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1786 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1787 layer->bca = base[16] >> 7; 1788 1789 return 0; 1790 } 1791 1792 static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s) 1793 { 1794 int ret; 1795 u_char buf[8]; 1796 struct packet_command cgc; 1797 struct cdrom_device_ops *cdo = cdi->ops; 1798 1799 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1800 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1801 cgc.cmd[6] = s->copyright.layer_num; 1802 cgc.cmd[7] = s->type; 1803 cgc.cmd[8] = cgc.buflen >> 8; 1804 cgc.cmd[9] = cgc.buflen & 0xff; 1805 1806 if ((ret = cdo->generic_packet(cdi, &cgc))) 1807 return ret; 1808 1809 s->copyright.cpst = buf[4]; 1810 s->copyright.rmi = buf[5]; 1811 1812 return 0; 1813 } 1814 1815 static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s) 1816 { 1817 int ret, size; 1818 u_char *buf; 1819 struct packet_command cgc; 1820 struct cdrom_device_ops *cdo = cdi->ops; 1821 1822 size = sizeof(s->disckey.value) + 4; 1823 1824 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) 1825 return -ENOMEM; 1826 1827 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1828 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1829 cgc.cmd[7] = s->type; 1830 cgc.cmd[8] = size >> 8; 1831 cgc.cmd[9] = size & 0xff; 1832 cgc.cmd[10] = s->disckey.agid << 6; 1833 1834 if (!(ret = cdo->generic_packet(cdi, &cgc))) 1835 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1836 1837 kfree(buf); 1838 return ret; 1839 } 1840 1841 static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s) 1842 { 1843 int ret; 1844 u_char buf[4 + 188]; 1845 struct packet_command cgc; 1846 struct cdrom_device_ops *cdo = cdi->ops; 1847 1848 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1849 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1850 cgc.cmd[7] = s->type; 1851 cgc.cmd[9] = cgc.buflen & 0xff; 1852 1853 if ((ret = cdo->generic_packet(cdi, &cgc))) 1854 return ret; 1855 1856 s->bca.len = buf[0] << 8 | buf[1]; 1857 if (s->bca.len < 12 || s->bca.len > 188) { 1858 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len); 1859 return -EIO; 1860 } 1861 memcpy(s->bca.value, &buf[4], s->bca.len); 1862 1863 return 0; 1864 } 1865 1866 static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s) 1867 { 1868 int ret = 0, size; 1869 u_char *buf; 1870 struct packet_command cgc; 1871 struct cdrom_device_ops *cdo = cdi->ops; 1872 1873 size = sizeof(s->manufact.value) + 4; 1874 1875 if ((buf = kmalloc(size, GFP_KERNEL)) == NULL) 1876 return -ENOMEM; 1877 1878 init_cdrom_command(&cgc, buf, size, CGC_DATA_READ); 1879 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1880 cgc.cmd[7] = s->type; 1881 cgc.cmd[8] = size >> 8; 1882 cgc.cmd[9] = size & 0xff; 1883 1884 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1885 kfree(buf); 1886 return ret; 1887 } 1888 1889 s->manufact.len = buf[0] << 8 | buf[1]; 1890 if (s->manufact.len < 0 || s->manufact.len > 2048) { 1891 cdinfo(CD_WARNING, "Received invalid manufacture info length" 1892 " (%d)\n", s->manufact.len); 1893 ret = -EIO; 1894 } else { 1895 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1896 } 1897 1898 kfree(buf); 1899 return ret; 1900 } 1901 1902 static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s) 1903 { 1904 switch (s->type) { 1905 case DVD_STRUCT_PHYSICAL: 1906 return dvd_read_physical(cdi, s); 1907 1908 case DVD_STRUCT_COPYRIGHT: 1909 return dvd_read_copyright(cdi, s); 1910 1911 case DVD_STRUCT_DISCKEY: 1912 return dvd_read_disckey(cdi, s); 1913 1914 case DVD_STRUCT_BCA: 1915 return dvd_read_bca(cdi, s); 1916 1917 case DVD_STRUCT_MANUFACT: 1918 return dvd_read_manufact(cdi, s); 1919 1920 default: 1921 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1922 s->type); 1923 return -EINVAL; 1924 } 1925 } 1926 1927 int cdrom_mode_sense(struct cdrom_device_info *cdi, 1928 struct packet_command *cgc, 1929 int page_code, int page_control) 1930 { 1931 struct cdrom_device_ops *cdo = cdi->ops; 1932 1933 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1934 1935 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1936 cgc->cmd[2] = page_code | (page_control << 6); 1937 cgc->cmd[7] = cgc->buflen >> 8; 1938 cgc->cmd[8] = cgc->buflen & 0xff; 1939 cgc->data_direction = CGC_DATA_READ; 1940 return cdo->generic_packet(cdi, cgc); 1941 } 1942 1943 int cdrom_mode_select(struct cdrom_device_info *cdi, 1944 struct packet_command *cgc) 1945 { 1946 struct cdrom_device_ops *cdo = cdi->ops; 1947 1948 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1949 memset(cgc->buffer, 0, 2); 1950 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 1951 cgc->cmd[1] = 0x10; /* PF */ 1952 cgc->cmd[7] = cgc->buflen >> 8; 1953 cgc->cmd[8] = cgc->buflen & 0xff; 1954 cgc->data_direction = CGC_DATA_WRITE; 1955 return cdo->generic_packet(cdi, cgc); 1956 } 1957 1958 static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 1959 struct cdrom_subchnl *subchnl, int mcn) 1960 { 1961 struct cdrom_device_ops *cdo = cdi->ops; 1962 struct packet_command cgc; 1963 char buffer[32]; 1964 int ret; 1965 1966 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 1967 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 1968 cgc.cmd[1] = 2; /* MSF addressing */ 1969 cgc.cmd[2] = 0x40; /* request subQ data */ 1970 cgc.cmd[3] = mcn ? 2 : 1; 1971 cgc.cmd[8] = 16; 1972 1973 if ((ret = cdo->generic_packet(cdi, &cgc))) 1974 return ret; 1975 1976 subchnl->cdsc_audiostatus = cgc.buffer[1]; 1977 subchnl->cdsc_format = CDROM_MSF; 1978 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 1979 subchnl->cdsc_trk = cgc.buffer[6]; 1980 subchnl->cdsc_ind = cgc.buffer[7]; 1981 1982 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 1983 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 1984 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 1985 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 1986 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 1987 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 1988 1989 return 0; 1990 } 1991 1992 /* 1993 * Specific READ_10 interface 1994 */ 1995 static int cdrom_read_cd(struct cdrom_device_info *cdi, 1996 struct packet_command *cgc, int lba, 1997 int blocksize, int nblocks) 1998 { 1999 struct cdrom_device_ops *cdo = cdi->ops; 2000 2001 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2002 cgc->cmd[0] = GPCMD_READ_10; 2003 cgc->cmd[2] = (lba >> 24) & 0xff; 2004 cgc->cmd[3] = (lba >> 16) & 0xff; 2005 cgc->cmd[4] = (lba >> 8) & 0xff; 2006 cgc->cmd[5] = lba & 0xff; 2007 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2008 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2009 cgc->cmd[8] = nblocks & 0xff; 2010 cgc->buflen = blocksize * nblocks; 2011 return cdo->generic_packet(cdi, cgc); 2012 } 2013 2014 /* very generic interface for reading the various types of blocks */ 2015 static int cdrom_read_block(struct cdrom_device_info *cdi, 2016 struct packet_command *cgc, 2017 int lba, int nblocks, int format, int blksize) 2018 { 2019 struct cdrom_device_ops *cdo = cdi->ops; 2020 2021 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2022 cgc->cmd[0] = GPCMD_READ_CD; 2023 /* expected sector size - cdda,mode1,etc. */ 2024 cgc->cmd[1] = format << 2; 2025 /* starting address */ 2026 cgc->cmd[2] = (lba >> 24) & 0xff; 2027 cgc->cmd[3] = (lba >> 16) & 0xff; 2028 cgc->cmd[4] = (lba >> 8) & 0xff; 2029 cgc->cmd[5] = lba & 0xff; 2030 /* number of blocks */ 2031 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2032 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2033 cgc->cmd[8] = nblocks & 0xff; 2034 cgc->buflen = blksize * nblocks; 2035 2036 /* set the header info returned */ 2037 switch (blksize) { 2038 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2039 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2040 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2041 default : cgc->cmd[9] = 0x10; 2042 } 2043 2044 return cdo->generic_packet(cdi, cgc); 2045 } 2046 2047 static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2048 int lba, int nframes) 2049 { 2050 struct packet_command cgc; 2051 int ret = 0; 2052 int nr; 2053 2054 cdi->last_sense = 0; 2055 2056 memset(&cgc, 0, sizeof(cgc)); 2057 2058 /* 2059 * start with will ra.nframes size, back down if alloc fails 2060 */ 2061 nr = nframes; 2062 do { 2063 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2064 if (cgc.buffer) 2065 break; 2066 2067 nr >>= 1; 2068 } while (nr); 2069 2070 if (!nr) 2071 return -ENOMEM; 2072 2073 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) { 2074 ret = -EFAULT; 2075 goto out; 2076 } 2077 2078 cgc.data_direction = CGC_DATA_READ; 2079 while (nframes > 0) { 2080 if (nr > nframes) 2081 nr = nframes; 2082 2083 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2084 if (ret) 2085 break; 2086 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2087 ret = -EFAULT; 2088 break; 2089 } 2090 ubuf += CD_FRAMESIZE_RAW * nr; 2091 nframes -= nr; 2092 lba += nr; 2093 } 2094 out: 2095 kfree(cgc.buffer); 2096 return ret; 2097 } 2098 2099 static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2100 int lba, int nframes) 2101 { 2102 struct request_queue *q = cdi->disk->queue; 2103 struct request *rq; 2104 struct bio *bio; 2105 unsigned int len; 2106 int nr, ret = 0; 2107 2108 if (!q) 2109 return -ENXIO; 2110 2111 rq = blk_get_request(q, READ, GFP_KERNEL); 2112 if (!rq) 2113 return -ENOMEM; 2114 2115 cdi->last_sense = 0; 2116 2117 while (nframes) { 2118 nr = nframes; 2119 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2120 nr = 1; 2121 if (nr * CD_FRAMESIZE_RAW > (q->max_sectors << 9)) 2122 nr = (q->max_sectors << 9) / CD_FRAMESIZE_RAW; 2123 2124 len = nr * CD_FRAMESIZE_RAW; 2125 2126 ret = blk_rq_map_user(q, rq, ubuf, len); 2127 if (ret) 2128 break; 2129 2130 memset(rq->cmd, 0, sizeof(rq->cmd)); 2131 rq->cmd[0] = GPCMD_READ_CD; 2132 rq->cmd[1] = 1 << 2; 2133 rq->cmd[2] = (lba >> 24) & 0xff; 2134 rq->cmd[3] = (lba >> 16) & 0xff; 2135 rq->cmd[4] = (lba >> 8) & 0xff; 2136 rq->cmd[5] = lba & 0xff; 2137 rq->cmd[6] = (nr >> 16) & 0xff; 2138 rq->cmd[7] = (nr >> 8) & 0xff; 2139 rq->cmd[8] = nr & 0xff; 2140 rq->cmd[9] = 0xf8; 2141 2142 rq->cmd_len = 12; 2143 rq->cmd_type = REQ_TYPE_BLOCK_PC; 2144 rq->timeout = 60 * HZ; 2145 bio = rq->bio; 2146 2147 if (blk_execute_rq(q, cdi->disk, rq, 0)) { 2148 struct request_sense *s = rq->sense; 2149 ret = -EIO; 2150 cdi->last_sense = s->sense_key; 2151 } 2152 2153 if (blk_rq_unmap_user(bio)) 2154 ret = -EFAULT; 2155 2156 if (ret) 2157 break; 2158 2159 nframes -= nr; 2160 lba += nr; 2161 ubuf += len; 2162 } 2163 2164 blk_put_request(rq); 2165 return ret; 2166 } 2167 2168 static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2169 int lba, int nframes) 2170 { 2171 int ret; 2172 2173 if (cdi->cdda_method == CDDA_OLD) 2174 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2175 2176 retry: 2177 /* 2178 * for anything else than success and io error, we need to retry 2179 */ 2180 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2181 if (!ret || ret != -EIO) 2182 return ret; 2183 2184 /* 2185 * I've seen drives get sense 4/8/3 udma crc errors on multi 2186 * frame dma, so drop to single frame dma if we need to 2187 */ 2188 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2189 printk("cdrom: dropping to single frame dma\n"); 2190 cdi->cdda_method = CDDA_BPC_SINGLE; 2191 goto retry; 2192 } 2193 2194 /* 2195 * so we have an io error of some sort with multi frame dma. if the 2196 * condition wasn't a hardware error 2197 * problems, not for any error 2198 */ 2199 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2200 return ret; 2201 2202 printk("cdrom: dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2203 cdi->cdda_method = CDDA_OLD; 2204 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2205 } 2206 2207 static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2208 void __user *argp) 2209 { 2210 struct cdrom_multisession ms_info; 2211 u8 requested_format; 2212 int ret; 2213 2214 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2215 2216 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2217 return -ENOSYS; 2218 2219 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2220 return -EFAULT; 2221 2222 requested_format = ms_info.addr_format; 2223 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2224 return -EINVAL; 2225 ms_info.addr_format = CDROM_LBA; 2226 2227 ret = cdi->ops->get_last_session(cdi, &ms_info); 2228 if (ret) 2229 return ret; 2230 2231 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2232 2233 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2234 return -EFAULT; 2235 2236 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2237 return 0; 2238 } 2239 2240 static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2241 { 2242 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2243 2244 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2245 return -ENOSYS; 2246 if (cdi->use_count != 1 || keeplocked) 2247 return -EBUSY; 2248 if (CDROM_CAN(CDC_LOCK)) { 2249 int ret = cdi->ops->lock_door(cdi, 0); 2250 if (ret) 2251 return ret; 2252 } 2253 2254 return cdi->ops->tray_move(cdi, 1); 2255 } 2256 2257 static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2258 { 2259 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2260 2261 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2262 return -ENOSYS; 2263 return cdi->ops->tray_move(cdi, 0); 2264 } 2265 2266 static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2267 unsigned long arg) 2268 { 2269 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2270 2271 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2272 return -ENOSYS; 2273 if (keeplocked) 2274 return -EBUSY; 2275 2276 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2277 if (arg) 2278 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2279 return 0; 2280 } 2281 2282 static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2283 unsigned long arg) 2284 { 2285 struct cdrom_changer_info *info; 2286 int ret; 2287 2288 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2289 2290 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2291 return -ENOSYS; 2292 2293 /* cannot select disc or select current disc */ 2294 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2295 return media_changed(cdi, 1); 2296 2297 if ((unsigned int)arg >= cdi->capacity) 2298 return -EINVAL; 2299 2300 info = kmalloc(sizeof(*info), GFP_KERNEL); 2301 if (!info) 2302 return -ENOMEM; 2303 2304 ret = cdrom_read_mech_status(cdi, info); 2305 if (!ret) 2306 ret = info->slots[arg].change; 2307 kfree(info); 2308 return ret; 2309 } 2310 2311 static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2312 unsigned long arg) 2313 { 2314 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2315 2316 /* 2317 * Options need to be in sync with capability. 2318 * Too late for that, so we have to check each one separately. 2319 */ 2320 switch (arg) { 2321 case CDO_USE_FFLAGS: 2322 case CDO_CHECK_TYPE: 2323 break; 2324 case CDO_LOCK: 2325 if (!CDROM_CAN(CDC_LOCK)) 2326 return -ENOSYS; 2327 break; 2328 case 0: 2329 return cdi->options; 2330 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2331 default: 2332 if (!CDROM_CAN(arg)) 2333 return -ENOSYS; 2334 } 2335 cdi->options |= (int) arg; 2336 return cdi->options; 2337 } 2338 2339 static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2340 unsigned long arg) 2341 { 2342 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2343 2344 cdi->options &= ~(int) arg; 2345 return cdi->options; 2346 } 2347 2348 static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2349 unsigned long arg) 2350 { 2351 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2352 2353 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2354 return -ENOSYS; 2355 return cdi->ops->select_speed(cdi, arg); 2356 } 2357 2358 static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2359 unsigned long arg) 2360 { 2361 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2362 2363 if (!CDROM_CAN(CDC_SELECT_DISC)) 2364 return -ENOSYS; 2365 2366 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2367 if ((int)arg >= cdi->capacity) 2368 return -EINVAL; 2369 } 2370 2371 /* 2372 * ->select_disc is a hook to allow a driver-specific way of 2373 * seleting disc. However, since there is no equivalent hook for 2374 * cdrom_slot_status this may not actually be useful... 2375 */ 2376 if (cdi->ops->select_disc) 2377 return cdi->ops->select_disc(cdi, arg); 2378 2379 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2380 return cdrom_select_disc(cdi, arg); 2381 } 2382 2383 static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2384 struct block_device *bdev) 2385 { 2386 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2387 2388 if (!capable(CAP_SYS_ADMIN)) 2389 return -EACCES; 2390 if (!CDROM_CAN(CDC_RESET)) 2391 return -ENOSYS; 2392 invalidate_bdev(bdev); 2393 return cdi->ops->reset(cdi); 2394 } 2395 2396 static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2397 unsigned long arg) 2398 { 2399 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl"); 2400 2401 if (!CDROM_CAN(CDC_LOCK)) 2402 return -EDRIVE_CANT_DO_THIS; 2403 2404 keeplocked = arg ? 1 : 0; 2405 2406 /* 2407 * Don't unlock the door on multiple opens by default, but allow 2408 * root to do so. 2409 */ 2410 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2411 return -EBUSY; 2412 return cdi->ops->lock_door(cdi, arg); 2413 } 2414 2415 static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2416 unsigned long arg) 2417 { 2418 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis"); 2419 2420 if (!capable(CAP_SYS_ADMIN)) 2421 return -EACCES; 2422 debug = arg ? 1 : 0; 2423 return debug; 2424 } 2425 2426 static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2427 { 2428 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2429 return (cdi->ops->capability & ~cdi->mask); 2430 } 2431 2432 /* 2433 * The following function is implemented, although very few audio 2434 * discs give Universal Product Code information, which should just be 2435 * the Medium Catalog Number on the box. Note, that the way the code 2436 * is written on the CD is /not/ uniform across all discs! 2437 */ 2438 static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2439 void __user *argp) 2440 { 2441 struct cdrom_mcn mcn; 2442 int ret; 2443 2444 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2445 2446 if (!(cdi->ops->capability & CDC_MCN)) 2447 return -ENOSYS; 2448 ret = cdi->ops->get_mcn(cdi, &mcn); 2449 if (ret) 2450 return ret; 2451 2452 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2453 return -EFAULT; 2454 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2455 return 0; 2456 } 2457 2458 static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2459 unsigned long arg) 2460 { 2461 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2462 2463 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2464 return -ENOSYS; 2465 if (!CDROM_CAN(CDC_SELECT_DISC) || 2466 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2467 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2468 if (((int)arg >= cdi->capacity)) 2469 return -EINVAL; 2470 return cdrom_slot_status(cdi, arg); 2471 } 2472 2473 /* 2474 * Ok, this is where problems start. The current interface for the 2475 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2476 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this 2477 * is often the case, it is also very common for CDs to have some tracks 2478 * with data, and some tracks with audio. Just because I feel like it, 2479 * I declare the following to be the best way to cope. If the CD has ANY 2480 * data tracks on it, it will be returned as a data CD. If it has any XA 2481 * tracks, I will return it as that. Now I could simplify this interface 2482 * by combining these returns with the above, but this more clearly 2483 * demonstrates the problem with the current interface. Too bad this 2484 * wasn't designed to use bitmasks... -Erik 2485 * 2486 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2487 * User level programmers might feel the ioctl is not very useful. 2488 * ---david 2489 */ 2490 static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2491 { 2492 tracktype tracks; 2493 2494 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2495 2496 cdrom_count_tracks(cdi, &tracks); 2497 if (tracks.error) 2498 return tracks.error; 2499 2500 /* Policy mode on */ 2501 if (tracks.audio > 0) { 2502 if (!tracks.data && !tracks.cdi && !tracks.xa) 2503 return CDS_AUDIO; 2504 else 2505 return CDS_MIXED; 2506 } 2507 2508 if (tracks.cdi > 0) 2509 return CDS_XA_2_2; 2510 if (tracks.xa > 0) 2511 return CDS_XA_2_1; 2512 if (tracks.data > 0) 2513 return CDS_DATA_1; 2514 /* Policy mode off */ 2515 2516 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n"); 2517 return CDS_NO_INFO; 2518 } 2519 2520 static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2521 { 2522 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2523 return cdi->capacity; 2524 } 2525 2526 static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2527 void __user *argp) 2528 { 2529 struct cdrom_subchnl q; 2530 u8 requested, back; 2531 int ret; 2532 2533 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2534 2535 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2536 return -ENOSYS; 2537 if (copy_from_user(&q, argp, sizeof(q))) 2538 return -EFAULT; 2539 2540 requested = q.cdsc_format; 2541 if (requested != CDROM_MSF && requested != CDROM_LBA) 2542 return -EINVAL; 2543 q.cdsc_format = CDROM_MSF; 2544 2545 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2546 if (ret) 2547 return ret; 2548 2549 back = q.cdsc_format; /* local copy */ 2550 sanitize_format(&q.cdsc_absaddr, &back, requested); 2551 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2552 2553 if (copy_to_user(argp, &q, sizeof(q))) 2554 return -EFAULT; 2555 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2556 return 0; 2557 } 2558 2559 static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2560 void __user *argp) 2561 { 2562 struct cdrom_tochdr header; 2563 int ret; 2564 2565 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2566 2567 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2568 return -ENOSYS; 2569 if (copy_from_user(&header, argp, sizeof(header))) 2570 return -EFAULT; 2571 2572 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2573 if (ret) 2574 return ret; 2575 2576 if (copy_to_user(argp, &header, sizeof(header))) 2577 return -EFAULT; 2578 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2579 return 0; 2580 } 2581 2582 static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2583 void __user *argp) 2584 { 2585 struct cdrom_tocentry entry; 2586 u8 requested_format; 2587 int ret; 2588 2589 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2590 2591 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2592 return -ENOSYS; 2593 if (copy_from_user(&entry, argp, sizeof(entry))) 2594 return -EFAULT; 2595 2596 requested_format = entry.cdte_format; 2597 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2598 return -EINVAL; 2599 /* make interface to low-level uniform */ 2600 entry.cdte_format = CDROM_MSF; 2601 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2602 if (ret) 2603 return ret; 2604 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2605 2606 if (copy_to_user(argp, &entry, sizeof(entry))) 2607 return -EFAULT; 2608 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2609 return 0; 2610 } 2611 2612 static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2613 void __user *argp) 2614 { 2615 struct cdrom_msf msf; 2616 2617 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2618 2619 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2620 return -ENOSYS; 2621 if (copy_from_user(&msf, argp, sizeof(msf))) 2622 return -EFAULT; 2623 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2624 } 2625 2626 static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2627 void __user *argp) 2628 { 2629 struct cdrom_ti ti; 2630 int ret; 2631 2632 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2633 2634 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2635 return -ENOSYS; 2636 if (copy_from_user(&ti, argp, sizeof(ti))) 2637 return -EFAULT; 2638 2639 ret = check_for_audio_disc(cdi, cdi->ops); 2640 if (ret) 2641 return ret; 2642 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2643 } 2644 static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2645 void __user *argp) 2646 { 2647 struct cdrom_volctrl volume; 2648 2649 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2650 2651 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2652 return -ENOSYS; 2653 if (copy_from_user(&volume, argp, sizeof(volume))) 2654 return -EFAULT; 2655 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2656 } 2657 2658 static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2659 void __user *argp) 2660 { 2661 struct cdrom_volctrl volume; 2662 int ret; 2663 2664 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2665 2666 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2667 return -ENOSYS; 2668 2669 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2670 if (ret) 2671 return ret; 2672 2673 if (copy_to_user(argp, &volume, sizeof(volume))) 2674 return -EFAULT; 2675 return 0; 2676 } 2677 2678 static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2679 unsigned int cmd) 2680 { 2681 int ret; 2682 2683 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2684 2685 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2686 return -ENOSYS; 2687 ret = check_for_audio_disc(cdi, cdi->ops); 2688 if (ret) 2689 return ret; 2690 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2691 } 2692 2693 /* 2694 * Just about every imaginable ioctl is supported in the Uniform layer 2695 * these days. 2696 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 2697 */ 2698 int cdrom_ioctl(struct file * file, struct cdrom_device_info *cdi, 2699 struct inode *ip, unsigned int cmd, unsigned long arg) 2700 { 2701 void __user *argp = (void __user *)arg; 2702 int ret; 2703 struct gendisk *disk = ip->i_bdev->bd_disk; 2704 2705 /* 2706 * Try the generic SCSI command ioctl's first. 2707 */ 2708 ret = scsi_cmd_ioctl(file, disk->queue, disk, cmd, argp); 2709 if (ret != -ENOTTY) 2710 return ret; 2711 2712 switch (cmd) { 2713 case CDROMMULTISESSION: 2714 return cdrom_ioctl_multisession(cdi, argp); 2715 case CDROMEJECT: 2716 return cdrom_ioctl_eject(cdi); 2717 case CDROMCLOSETRAY: 2718 return cdrom_ioctl_closetray(cdi); 2719 case CDROMEJECT_SW: 2720 return cdrom_ioctl_eject_sw(cdi, arg); 2721 case CDROM_MEDIA_CHANGED: 2722 return cdrom_ioctl_media_changed(cdi, arg); 2723 case CDROM_SET_OPTIONS: 2724 return cdrom_ioctl_set_options(cdi, arg); 2725 case CDROM_CLEAR_OPTIONS: 2726 return cdrom_ioctl_clear_options(cdi, arg); 2727 case CDROM_SELECT_SPEED: 2728 return cdrom_ioctl_select_speed(cdi, arg); 2729 case CDROM_SELECT_DISC: 2730 return cdrom_ioctl_select_disc(cdi, arg); 2731 case CDROMRESET: 2732 return cdrom_ioctl_reset(cdi, ip->i_bdev); 2733 case CDROM_LOCKDOOR: 2734 return cdrom_ioctl_lock_door(cdi, arg); 2735 case CDROM_DEBUG: 2736 return cdrom_ioctl_debug(cdi, arg); 2737 case CDROM_GET_CAPABILITY: 2738 return cdrom_ioctl_get_capability(cdi); 2739 case CDROM_GET_MCN: 2740 return cdrom_ioctl_get_mcn(cdi, argp); 2741 case CDROM_DRIVE_STATUS: 2742 return cdrom_ioctl_drive_status(cdi, arg); 2743 case CDROM_DISC_STATUS: 2744 return cdrom_ioctl_disc_status(cdi); 2745 case CDROM_CHANGER_NSLOTS: 2746 return cdrom_ioctl_changer_nslots(cdi); 2747 } 2748 2749 /* 2750 * Use the ioctls that are implemented through the generic_packet() 2751 * interface. this may look at bit funny, but if -ENOTTY is 2752 * returned that particular ioctl is not implemented and we 2753 * let it go through the device specific ones. 2754 */ 2755 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 2756 ret = mmc_ioctl(cdi, cmd, arg); 2757 if (ret != -ENOTTY) 2758 return ret; 2759 } 2760 2761 /* 2762 * Note: most of the cdinfo() calls are commented out here, 2763 * because they fill up the sys log when CD players poll 2764 * the drive. 2765 */ 2766 switch (cmd) { 2767 case CDROMSUBCHNL: 2768 return cdrom_ioctl_get_subchnl(cdi, argp); 2769 case CDROMREADTOCHDR: 2770 return cdrom_ioctl_read_tochdr(cdi, argp); 2771 case CDROMREADTOCENTRY: 2772 return cdrom_ioctl_read_tocentry(cdi, argp); 2773 case CDROMPLAYMSF: 2774 return cdrom_ioctl_play_msf(cdi, argp); 2775 case CDROMPLAYTRKIND: 2776 return cdrom_ioctl_play_trkind(cdi, argp); 2777 case CDROMVOLCTRL: 2778 return cdrom_ioctl_volctrl(cdi, argp); 2779 case CDROMVOLREAD: 2780 return cdrom_ioctl_volread(cdi, argp); 2781 case CDROMSTART: 2782 case CDROMSTOP: 2783 case CDROMPAUSE: 2784 case CDROMRESUME: 2785 return cdrom_ioctl_audioctl(cdi, cmd); 2786 } 2787 2788 return -ENOSYS; 2789 } 2790 2791 /* 2792 * Required when we need to use READ_10 to issue other than 2048 block 2793 * reads 2794 */ 2795 static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2796 { 2797 struct cdrom_device_ops *cdo = cdi->ops; 2798 struct packet_command cgc; 2799 struct modesel_head mh; 2800 2801 memset(&mh, 0, sizeof(mh)); 2802 mh.block_desc_length = 0x08; 2803 mh.block_length_med = (size >> 8) & 0xff; 2804 mh.block_length_lo = size & 0xff; 2805 2806 memset(&cgc, 0, sizeof(cgc)); 2807 cgc.cmd[0] = 0x15; 2808 cgc.cmd[1] = 1 << 4; 2809 cgc.cmd[4] = 12; 2810 cgc.buflen = sizeof(mh); 2811 cgc.buffer = (char *) &mh; 2812 cgc.data_direction = CGC_DATA_WRITE; 2813 mh.block_desc_length = 0x08; 2814 mh.block_length_med = (size >> 8) & 0xff; 2815 mh.block_length_lo = size & 0xff; 2816 2817 return cdo->generic_packet(cdi, &cgc); 2818 } 2819 2820 static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 2821 unsigned long arg) 2822 { 2823 struct cdrom_device_ops *cdo = cdi->ops; 2824 struct packet_command cgc; 2825 struct request_sense sense; 2826 unsigned char buffer[32]; 2827 int ret = 0; 2828 2829 memset(&cgc, 0, sizeof(cgc)); 2830 2831 /* build a unified command and queue it through 2832 cdo->generic_packet() */ 2833 switch (cmd) { 2834 case CDROMREADRAW: 2835 case CDROMREADMODE1: 2836 case CDROMREADMODE2: { 2837 struct cdrom_msf msf; 2838 int blocksize = 0, format = 0, lba; 2839 2840 switch (cmd) { 2841 case CDROMREADRAW: 2842 blocksize = CD_FRAMESIZE_RAW; 2843 break; 2844 case CDROMREADMODE1: 2845 blocksize = CD_FRAMESIZE; 2846 format = 2; 2847 break; 2848 case CDROMREADMODE2: 2849 blocksize = CD_FRAMESIZE_RAW0; 2850 break; 2851 } 2852 IOCTL_IN(arg, struct cdrom_msf, msf); 2853 lba = msf_to_lba(msf.cdmsf_min0,msf.cdmsf_sec0,msf.cdmsf_frame0); 2854 /* FIXME: we need upper bound checking, too!! */ 2855 if (lba < 0) 2856 return -EINVAL; 2857 cgc.buffer = kmalloc(blocksize, GFP_KERNEL); 2858 if (cgc.buffer == NULL) 2859 return -ENOMEM; 2860 memset(&sense, 0, sizeof(sense)); 2861 cgc.sense = &sense; 2862 cgc.data_direction = CGC_DATA_READ; 2863 ret = cdrom_read_block(cdi, &cgc, lba, 1, format, blocksize); 2864 if (ret && sense.sense_key==0x05 && sense.asc==0x20 && sense.ascq==0x00) { 2865 /* 2866 * SCSI-II devices are not required to support 2867 * READ_CD, so let's try switching block size 2868 */ 2869 /* FIXME: switch back again... */ 2870 if ((ret = cdrom_switch_blocksize(cdi, blocksize))) { 2871 kfree(cgc.buffer); 2872 return ret; 2873 } 2874 cgc.sense = NULL; 2875 ret = cdrom_read_cd(cdi, &cgc, lba, blocksize, 1); 2876 ret |= cdrom_switch_blocksize(cdi, blocksize); 2877 } 2878 if (!ret && copy_to_user((char __user *)arg, cgc.buffer, blocksize)) 2879 ret = -EFAULT; 2880 kfree(cgc.buffer); 2881 return ret; 2882 } 2883 case CDROMREADAUDIO: { 2884 struct cdrom_read_audio ra; 2885 int lba; 2886 2887 IOCTL_IN(arg, struct cdrom_read_audio, ra); 2888 2889 if (ra.addr_format == CDROM_MSF) 2890 lba = msf_to_lba(ra.addr.msf.minute, 2891 ra.addr.msf.second, 2892 ra.addr.msf.frame); 2893 else if (ra.addr_format == CDROM_LBA) 2894 lba = ra.addr.lba; 2895 else 2896 return -EINVAL; 2897 2898 /* FIXME: we need upper bound checking, too!! */ 2899 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 2900 return -EINVAL; 2901 2902 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 2903 } 2904 case CDROMSUBCHNL: { 2905 struct cdrom_subchnl q; 2906 u_char requested, back; 2907 IOCTL_IN(arg, struct cdrom_subchnl, q); 2908 requested = q.cdsc_format; 2909 if (!((requested == CDROM_MSF) || 2910 (requested == CDROM_LBA))) 2911 return -EINVAL; 2912 q.cdsc_format = CDROM_MSF; 2913 if ((ret = cdrom_read_subchannel(cdi, &q, 0))) 2914 return ret; 2915 back = q.cdsc_format; /* local copy */ 2916 sanitize_format(&q.cdsc_absaddr, &back, requested); 2917 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2918 IOCTL_OUT(arg, struct cdrom_subchnl, q); 2919 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2920 return 0; 2921 } 2922 case CDROMPLAYMSF: { 2923 struct cdrom_msf msf; 2924 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2925 IOCTL_IN(arg, struct cdrom_msf, msf); 2926 cgc.cmd[0] = GPCMD_PLAY_AUDIO_MSF; 2927 cgc.cmd[3] = msf.cdmsf_min0; 2928 cgc.cmd[4] = msf.cdmsf_sec0; 2929 cgc.cmd[5] = msf.cdmsf_frame0; 2930 cgc.cmd[6] = msf.cdmsf_min1; 2931 cgc.cmd[7] = msf.cdmsf_sec1; 2932 cgc.cmd[8] = msf.cdmsf_frame1; 2933 cgc.data_direction = CGC_DATA_NONE; 2934 return cdo->generic_packet(cdi, &cgc); 2935 } 2936 case CDROMPLAYBLK: { 2937 struct cdrom_blk blk; 2938 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 2939 IOCTL_IN(arg, struct cdrom_blk, blk); 2940 cgc.cmd[0] = GPCMD_PLAY_AUDIO_10; 2941 cgc.cmd[2] = (blk.from >> 24) & 0xff; 2942 cgc.cmd[3] = (blk.from >> 16) & 0xff; 2943 cgc.cmd[4] = (blk.from >> 8) & 0xff; 2944 cgc.cmd[5] = blk.from & 0xff; 2945 cgc.cmd[7] = (blk.len >> 8) & 0xff; 2946 cgc.cmd[8] = blk.len & 0xff; 2947 cgc.data_direction = CGC_DATA_NONE; 2948 return cdo->generic_packet(cdi, &cgc); 2949 } 2950 case CDROMVOLCTRL: 2951 case CDROMVOLREAD: { 2952 struct cdrom_volctrl volctrl; 2953 char mask[sizeof(buffer)]; 2954 unsigned short offset; 2955 2956 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 2957 2958 IOCTL_IN(arg, struct cdrom_volctrl, volctrl); 2959 2960 cgc.buffer = buffer; 2961 cgc.buflen = 24; 2962 if ((ret = cdrom_mode_sense(cdi, &cgc, GPMODE_AUDIO_CTL_PAGE, 0))) 2963 return ret; 2964 2965 /* originally the code depended on buffer[1] to determine 2966 how much data is available for transfer. buffer[1] is 2967 unfortunately ambigious and the only reliable way seem 2968 to be to simply skip over the block descriptor... */ 2969 offset = 8 + be16_to_cpu(*(__be16 *)(buffer+6)); 2970 2971 if (offset + 16 > sizeof(buffer)) 2972 return -E2BIG; 2973 2974 if (offset + 16 > cgc.buflen) { 2975 cgc.buflen = offset+16; 2976 ret = cdrom_mode_sense(cdi, &cgc, 2977 GPMODE_AUDIO_CTL_PAGE, 0); 2978 if (ret) 2979 return ret; 2980 } 2981 2982 /* sanity check */ 2983 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 2984 buffer[offset+1] < 14) 2985 return -EINVAL; 2986 2987 /* now we have the current volume settings. if it was only 2988 a CDROMVOLREAD, return these values */ 2989 if (cmd == CDROMVOLREAD) { 2990 volctrl.channel0 = buffer[offset+9]; 2991 volctrl.channel1 = buffer[offset+11]; 2992 volctrl.channel2 = buffer[offset+13]; 2993 volctrl.channel3 = buffer[offset+15]; 2994 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl); 2995 return 0; 2996 } 2997 2998 /* get the volume mask */ 2999 cgc.buffer = mask; 3000 if ((ret = cdrom_mode_sense(cdi, &cgc, 3001 GPMODE_AUDIO_CTL_PAGE, 1))) 3002 return ret; 3003 3004 buffer[offset+9] = volctrl.channel0 & mask[offset+9]; 3005 buffer[offset+11] = volctrl.channel1 & mask[offset+11]; 3006 buffer[offset+13] = volctrl.channel2 & mask[offset+13]; 3007 buffer[offset+15] = volctrl.channel3 & mask[offset+15]; 3008 3009 /* set volume */ 3010 cgc.buffer = buffer + offset - 8; 3011 memset(cgc.buffer, 0, 8); 3012 return cdrom_mode_select(cdi, &cgc); 3013 } 3014 3015 case CDROMSTART: 3016 case CDROMSTOP: { 3017 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3018 cgc.cmd[0] = GPCMD_START_STOP_UNIT; 3019 cgc.cmd[1] = 1; 3020 cgc.cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3021 cgc.data_direction = CGC_DATA_NONE; 3022 return cdo->generic_packet(cdi, &cgc); 3023 } 3024 3025 case CDROMPAUSE: 3026 case CDROMRESUME: { 3027 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3028 cgc.cmd[0] = GPCMD_PAUSE_RESUME; 3029 cgc.cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3030 cgc.data_direction = CGC_DATA_NONE; 3031 return cdo->generic_packet(cdi, &cgc); 3032 } 3033 3034 case DVD_READ_STRUCT: { 3035 dvd_struct *s; 3036 int size = sizeof(dvd_struct); 3037 if (!CDROM_CAN(CDC_DVD)) 3038 return -ENOSYS; 3039 if ((s = kmalloc(size, GFP_KERNEL)) == NULL) 3040 return -ENOMEM; 3041 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3042 if (copy_from_user(s, (dvd_struct __user *)arg, size)) { 3043 kfree(s); 3044 return -EFAULT; 3045 } 3046 if ((ret = dvd_read_struct(cdi, s))) { 3047 kfree(s); 3048 return ret; 3049 } 3050 if (copy_to_user((dvd_struct __user *)arg, s, size)) 3051 ret = -EFAULT; 3052 kfree(s); 3053 return ret; 3054 } 3055 3056 case DVD_AUTH: { 3057 dvd_authinfo ai; 3058 if (!CDROM_CAN(CDC_DVD)) 3059 return -ENOSYS; 3060 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3061 IOCTL_IN(arg, dvd_authinfo, ai); 3062 if ((ret = dvd_do_auth (cdi, &ai))) 3063 return ret; 3064 IOCTL_OUT(arg, dvd_authinfo, ai); 3065 return 0; 3066 } 3067 3068 case CDROM_NEXT_WRITABLE: { 3069 long next = 0; 3070 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3071 if ((ret = cdrom_get_next_writable(cdi, &next))) 3072 return ret; 3073 IOCTL_OUT(arg, long, next); 3074 return 0; 3075 } 3076 case CDROM_LAST_WRITTEN: { 3077 long last = 0; 3078 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3079 if ((ret = cdrom_get_last_written(cdi, &last))) 3080 return ret; 3081 IOCTL_OUT(arg, long, last); 3082 return 0; 3083 } 3084 } /* switch */ 3085 3086 return -ENOTTY; 3087 } 3088 3089 static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type, 3090 track_information *ti) 3091 { 3092 struct cdrom_device_ops *cdo = cdi->ops; 3093 struct packet_command cgc; 3094 int ret, buflen; 3095 3096 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 3097 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 3098 cgc.cmd[1] = type & 3; 3099 cgc.cmd[4] = (track & 0xff00) >> 8; 3100 cgc.cmd[5] = track & 0xff; 3101 cgc.cmd[8] = 8; 3102 cgc.quiet = 1; 3103 3104 if ((ret = cdo->generic_packet(cdi, &cgc))) 3105 return ret; 3106 3107 buflen = be16_to_cpu(ti->track_information_length) + 3108 sizeof(ti->track_information_length); 3109 3110 if (buflen > sizeof(track_information)) 3111 buflen = sizeof(track_information); 3112 3113 cgc.cmd[8] = cgc.buflen = buflen; 3114 if ((ret = cdo->generic_packet(cdi, &cgc))) 3115 return ret; 3116 3117 /* return actual fill size */ 3118 return buflen; 3119 } 3120 3121 /* requires CD R/RW */ 3122 static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) 3123 { 3124 struct cdrom_device_ops *cdo = cdi->ops; 3125 struct packet_command cgc; 3126 int ret, buflen; 3127 3128 /* set up command and get the disc info */ 3129 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 3130 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 3131 cgc.cmd[8] = cgc.buflen = 2; 3132 cgc.quiet = 1; 3133 3134 if ((ret = cdo->generic_packet(cdi, &cgc))) 3135 return ret; 3136 3137 /* not all drives have the same disc_info length, so requeue 3138 * packet with the length the drive tells us it can supply 3139 */ 3140 buflen = be16_to_cpu(di->disc_information_length) + 3141 sizeof(di->disc_information_length); 3142 3143 if (buflen > sizeof(disc_information)) 3144 buflen = sizeof(disc_information); 3145 3146 cgc.cmd[8] = cgc.buflen = buflen; 3147 if ((ret = cdo->generic_packet(cdi, &cgc))) 3148 return ret; 3149 3150 /* return actual fill size */ 3151 return buflen; 3152 } 3153 3154 /* return the last written block on the CD-R media. this is for the udf 3155 file system. */ 3156 int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 3157 { 3158 struct cdrom_tocentry toc; 3159 disc_information di; 3160 track_information ti; 3161 __u32 last_track; 3162 int ret = -1, ti_size; 3163 3164 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3165 goto use_toc; 3166 3167 ret = cdrom_get_disc_info(cdi, &di); 3168 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 3169 + sizeof(di.last_track_lsb))) 3170 goto use_toc; 3171 3172 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3173 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3174 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3175 if (ti_size < (int)offsetof(typeof(ti), track_start)) 3176 goto use_toc; 3177 3178 /* if this track is blank, try the previous. */ 3179 if (ti.blank) { 3180 if (last_track==1) 3181 goto use_toc; 3182 last_track--; 3183 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3184 } 3185 3186 if (ti_size < (int)(offsetof(typeof(ti), track_size) 3187 + sizeof(ti.track_size))) 3188 goto use_toc; 3189 3190 /* if last recorded field is valid, return it. */ 3191 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 3192 + sizeof(ti.last_rec_address))) { 3193 *last_written = be32_to_cpu(ti.last_rec_address); 3194 } else { 3195 /* make it up instead */ 3196 *last_written = be32_to_cpu(ti.track_start) + 3197 be32_to_cpu(ti.track_size); 3198 if (ti.free_blocks) 3199 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 3200 } 3201 return 0; 3202 3203 /* this is where we end up if the drive either can't do a 3204 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 3205 it doesn't give enough information or fails. then we return 3206 the toc contents. */ 3207 use_toc: 3208 toc.cdte_format = CDROM_MSF; 3209 toc.cdte_track = CDROM_LEADOUT; 3210 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 3211 return ret; 3212 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 3213 *last_written = toc.cdte_addr.lba; 3214 return 0; 3215 } 3216 3217 /* return the next writable block. also for udf file system. */ 3218 static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable) 3219 { 3220 disc_information di; 3221 track_information ti; 3222 __u16 last_track; 3223 int ret, ti_size; 3224 3225 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3226 goto use_last_written; 3227 3228 ret = cdrom_get_disc_info(cdi, &di); 3229 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 3230 + sizeof(di.last_track_lsb)) 3231 goto use_last_written; 3232 3233 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3234 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3235 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3236 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 3237 goto use_last_written; 3238 3239 /* if this track is blank, try the previous. */ 3240 if (ti.blank) { 3241 if (last_track == 1) 3242 goto use_last_written; 3243 last_track--; 3244 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3245 if (ti_size < 0) 3246 goto use_last_written; 3247 } 3248 3249 /* if next recordable address field is valid, use it. */ 3250 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 3251 + sizeof(ti.next_writable)) { 3252 *next_writable = be32_to_cpu(ti.next_writable); 3253 return 0; 3254 } 3255 3256 use_last_written: 3257 if ((ret = cdrom_get_last_written(cdi, next_writable))) { 3258 *next_writable = 0; 3259 return ret; 3260 } else { 3261 *next_writable += 7; 3262 return 0; 3263 } 3264 } 3265 3266 EXPORT_SYMBOL(cdrom_get_last_written); 3267 EXPORT_SYMBOL(register_cdrom); 3268 EXPORT_SYMBOL(unregister_cdrom); 3269 EXPORT_SYMBOL(cdrom_open); 3270 EXPORT_SYMBOL(cdrom_release); 3271 EXPORT_SYMBOL(cdrom_ioctl); 3272 EXPORT_SYMBOL(cdrom_media_changed); 3273 EXPORT_SYMBOL(cdrom_number_of_slots); 3274 EXPORT_SYMBOL(cdrom_mode_select); 3275 EXPORT_SYMBOL(cdrom_mode_sense); 3276 EXPORT_SYMBOL(init_cdrom_command); 3277 EXPORT_SYMBOL(cdrom_get_media_event); 3278 3279 #ifdef CONFIG_SYSCTL 3280 3281 #define CDROM_STR_SIZE 1000 3282 3283 static struct cdrom_sysctl_settings { 3284 char info[CDROM_STR_SIZE]; /* general info */ 3285 int autoclose; /* close tray upon mount, etc */ 3286 int autoeject; /* eject on umount */ 3287 int debug; /* turn on debugging messages */ 3288 int lock; /* lock the door on device open */ 3289 int check; /* check media type */ 3290 } cdrom_sysctl_settings; 3291 3292 enum cdrom_print_option { 3293 CTL_NAME, 3294 CTL_SPEED, 3295 CTL_SLOTS, 3296 CTL_CAPABILITY 3297 }; 3298 3299 static int cdrom_print_info(const char *header, int val, char *info, 3300 int *pos, enum cdrom_print_option option) 3301 { 3302 const int max_size = sizeof(cdrom_sysctl_settings.info); 3303 struct cdrom_device_info *cdi; 3304 int ret; 3305 3306 ret = scnprintf(info + *pos, max_size - *pos, header); 3307 if (!ret) 3308 return 1; 3309 3310 *pos += ret; 3311 3312 for (cdi = topCdromPtr; cdi; cdi = cdi->next) { 3313 switch (option) { 3314 case CTL_NAME: 3315 ret = scnprintf(info + *pos, max_size - *pos, 3316 "\t%s", cdi->name); 3317 break; 3318 case CTL_SPEED: 3319 ret = scnprintf(info + *pos, max_size - *pos, 3320 "\t%d", cdi->speed); 3321 break; 3322 case CTL_SLOTS: 3323 ret = scnprintf(info + *pos, max_size - *pos, 3324 "\t%d", cdi->capacity); 3325 break; 3326 case CTL_CAPABILITY: 3327 ret = scnprintf(info + *pos, max_size - *pos, 3328 "\t%d", CDROM_CAN(val) != 0); 3329 break; 3330 default: 3331 printk(KERN_INFO "cdrom: invalid option%d\n", option); 3332 return 1; 3333 } 3334 if (!ret) 3335 return 1; 3336 *pos += ret; 3337 } 3338 3339 return 0; 3340 } 3341 3342 static int cdrom_sysctl_info(ctl_table *ctl, int write, struct file * filp, 3343 void __user *buffer, size_t *lenp, loff_t *ppos) 3344 { 3345 int pos; 3346 char *info = cdrom_sysctl_settings.info; 3347 const int max_size = sizeof(cdrom_sysctl_settings.info); 3348 3349 if (!*lenp || (*ppos && !write)) { 3350 *lenp = 0; 3351 return 0; 3352 } 3353 3354 mutex_lock(&cdrom_mutex); 3355 3356 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3357 3358 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3359 goto done; 3360 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3361 goto done; 3362 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3363 goto done; 3364 if (cdrom_print_info("\nCan close tray:\t", 3365 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3366 goto done; 3367 if (cdrom_print_info("\nCan open tray:\t", 3368 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3369 goto done; 3370 if (cdrom_print_info("\nCan lock tray:\t", 3371 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3372 goto done; 3373 if (cdrom_print_info("\nCan change speed:", 3374 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3375 goto done; 3376 if (cdrom_print_info("\nCan select disk:", 3377 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3378 goto done; 3379 if (cdrom_print_info("\nCan read multisession:", 3380 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3381 goto done; 3382 if (cdrom_print_info("\nCan read MCN:\t", 3383 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3384 goto done; 3385 if (cdrom_print_info("\nReports media changed:", 3386 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3387 goto done; 3388 if (cdrom_print_info("\nCan play audio:\t", 3389 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3390 goto done; 3391 if (cdrom_print_info("\nCan write CD-R:\t", 3392 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3393 goto done; 3394 if (cdrom_print_info("\nCan write CD-RW:", 3395 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3396 goto done; 3397 if (cdrom_print_info("\nCan read DVD:\t", 3398 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3399 goto done; 3400 if (cdrom_print_info("\nCan write DVD-R:", 3401 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3402 goto done; 3403 if (cdrom_print_info("\nCan write DVD-RAM:", 3404 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3405 goto done; 3406 if (cdrom_print_info("\nCan read MRW:\t", 3407 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3408 goto done; 3409 if (cdrom_print_info("\nCan write MRW:\t", 3410 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3411 goto done; 3412 if (cdrom_print_info("\nCan write RAM:\t", 3413 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3414 goto done; 3415 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3416 goto done; 3417 doit: 3418 mutex_unlock(&cdrom_mutex); 3419 return proc_dostring(ctl, write, filp, buffer, lenp, ppos); 3420 done: 3421 printk(KERN_INFO "cdrom: info buffer too small\n"); 3422 goto doit; 3423 } 3424 3425 /* Unfortunately, per device settings are not implemented through 3426 procfs/sysctl yet. When they are, this will naturally disappear. For now 3427 just update all drives. Later this will become the template on which 3428 new registered drives will be based. */ 3429 static void cdrom_update_settings(void) 3430 { 3431 struct cdrom_device_info *cdi; 3432 3433 for (cdi = topCdromPtr; cdi != NULL; cdi = cdi->next) { 3434 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3435 cdi->options |= CDO_AUTO_CLOSE; 3436 else if (!autoclose) 3437 cdi->options &= ~CDO_AUTO_CLOSE; 3438 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3439 cdi->options |= CDO_AUTO_EJECT; 3440 else if (!autoeject) 3441 cdi->options &= ~CDO_AUTO_EJECT; 3442 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3443 cdi->options |= CDO_LOCK; 3444 else if (!lockdoor) 3445 cdi->options &= ~CDO_LOCK; 3446 if (check_media_type) 3447 cdi->options |= CDO_CHECK_TYPE; 3448 else 3449 cdi->options &= ~CDO_CHECK_TYPE; 3450 } 3451 } 3452 3453 static int cdrom_sysctl_handler(ctl_table *ctl, int write, struct file * filp, 3454 void __user *buffer, size_t *lenp, loff_t *ppos) 3455 { 3456 int ret; 3457 3458 ret = proc_dointvec(ctl, write, filp, buffer, lenp, ppos); 3459 3460 if (write) { 3461 3462 /* we only care for 1 or 0. */ 3463 autoclose = !!cdrom_sysctl_settings.autoclose; 3464 autoeject = !!cdrom_sysctl_settings.autoeject; 3465 debug = !!cdrom_sysctl_settings.debug; 3466 lockdoor = !!cdrom_sysctl_settings.lock; 3467 check_media_type = !!cdrom_sysctl_settings.check; 3468 3469 /* update the option flags according to the changes. we 3470 don't have per device options through sysctl yet, 3471 but we will have and then this will disappear. */ 3472 cdrom_update_settings(); 3473 } 3474 3475 return ret; 3476 } 3477 3478 /* Place files in /proc/sys/dev/cdrom */ 3479 static ctl_table cdrom_table[] = { 3480 { 3481 .procname = "info", 3482 .data = &cdrom_sysctl_settings.info, 3483 .maxlen = CDROM_STR_SIZE, 3484 .mode = 0444, 3485 .proc_handler = &cdrom_sysctl_info, 3486 }, 3487 { 3488 .procname = "autoclose", 3489 .data = &cdrom_sysctl_settings.autoclose, 3490 .maxlen = sizeof(int), 3491 .mode = 0644, 3492 .proc_handler = &cdrom_sysctl_handler, 3493 }, 3494 { 3495 .procname = "autoeject", 3496 .data = &cdrom_sysctl_settings.autoeject, 3497 .maxlen = sizeof(int), 3498 .mode = 0644, 3499 .proc_handler = &cdrom_sysctl_handler, 3500 }, 3501 { 3502 .procname = "debug", 3503 .data = &cdrom_sysctl_settings.debug, 3504 .maxlen = sizeof(int), 3505 .mode = 0644, 3506 .proc_handler = &cdrom_sysctl_handler, 3507 }, 3508 { 3509 .procname = "lock", 3510 .data = &cdrom_sysctl_settings.lock, 3511 .maxlen = sizeof(int), 3512 .mode = 0644, 3513 .proc_handler = &cdrom_sysctl_handler, 3514 }, 3515 { 3516 .procname = "check_media", 3517 .data = &cdrom_sysctl_settings.check, 3518 .maxlen = sizeof(int), 3519 .mode = 0644, 3520 .proc_handler = &cdrom_sysctl_handler 3521 }, 3522 { .ctl_name = 0 } 3523 }; 3524 3525 static ctl_table cdrom_cdrom_table[] = { 3526 { 3527 .ctl_name = DEV_CDROM, 3528 .procname = "cdrom", 3529 .maxlen = 0, 3530 .mode = 0555, 3531 .child = cdrom_table, 3532 }, 3533 { .ctl_name = 0 } 3534 }; 3535 3536 /* Make sure that /proc/sys/dev is there */ 3537 static ctl_table cdrom_root_table[] = { 3538 { 3539 .ctl_name = CTL_DEV, 3540 .procname = "dev", 3541 .maxlen = 0, 3542 .mode = 0555, 3543 .child = cdrom_cdrom_table, 3544 }, 3545 { .ctl_name = 0 } 3546 }; 3547 static struct ctl_table_header *cdrom_sysctl_header; 3548 3549 static void cdrom_sysctl_register(void) 3550 { 3551 static int initialized; 3552 3553 if (initialized == 1) 3554 return; 3555 3556 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3557 3558 /* set the defaults */ 3559 cdrom_sysctl_settings.autoclose = autoclose; 3560 cdrom_sysctl_settings.autoeject = autoeject; 3561 cdrom_sysctl_settings.debug = debug; 3562 cdrom_sysctl_settings.lock = lockdoor; 3563 cdrom_sysctl_settings.check = check_media_type; 3564 3565 initialized = 1; 3566 } 3567 3568 static void cdrom_sysctl_unregister(void) 3569 { 3570 if (cdrom_sysctl_header) 3571 unregister_sysctl_table(cdrom_sysctl_header); 3572 } 3573 3574 #endif /* CONFIG_SYSCTL */ 3575 3576 static int __init cdrom_init(void) 3577 { 3578 #ifdef CONFIG_SYSCTL 3579 cdrom_sysctl_register(); 3580 #endif 3581 return 0; 3582 } 3583 3584 static void __exit cdrom_exit(void) 3585 { 3586 printk(KERN_INFO "Uniform CD-ROM driver unloaded\n"); 3587 #ifdef CONFIG_SYSCTL 3588 cdrom_sysctl_unregister(); 3589 #endif 3590 } 3591 3592 module_init(cdrom_init); 3593 module_exit(cdrom_exit); 3594 MODULE_LICENSE("GPL"); 3595