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