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? 31 322.00 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). 60 612.01 to 2.11 Dec 1997-Jan 1998 62 -- TO-DO! Write changelogs for 2.01 to 2.12. 63 642.12 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. 69 702.13 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. 84 852.50 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt 246 247#define REVISION "Revision: 3.20" 248#define VERSION "Id: cdrom.c 3.20 2003/12/17" 249 250/* I use an error-log mask to give fine grain control over the type of 251 messages dumped to the system logs. The available masks include: */ 252#define CD_NOTHING 0x0 253#define CD_WARNING 0x1 254#define CD_REG_UNREG 0x2 255#define CD_DO_IOCTL 0x4 256#define CD_OPEN 0x8 257#define CD_CLOSE 0x10 258#define CD_COUNT_TRACKS 0x20 259#define CD_CHANGER 0x40 260#define CD_DVD 0x80 261 262/* Define this to remove _all_ the debugging messages */ 263/* #define ERRLOGMASK CD_NOTHING */ 264#define ERRLOGMASK CD_WARNING 265/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 266/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 267 268#include <linux/module.h> 269#include <linux/fs.h> 270#include <linux/buffer_head.h> 271#include <linux/major.h> 272#include <linux/types.h> 273#include <linux/errno.h> 274#include <linux/kernel.h> 275#include <linux/mm.h> 276#include <linux/slab.h> 277#include <linux/cdrom.h> 278#include <linux/sysctl.h> 279#include <linux/proc_fs.h> 280#include <linux/blkpg.h> 281#include <linux/init.h> 282#include <linux/fcntl.h> 283#include <linux/blkdev.h> 284#include <linux/times.h> 285 286#include <asm/uaccess.h> 287 288/* used to tell the module to turn on full debugging messages */ 289static int debug; 290/* used to keep tray locked at all times */ 291static int keeplocked; 292/* default compatibility mode */ 293static int autoclose=1; 294static int autoeject; 295static int lockdoor = 1; 296/* will we ever get to use this... sigh. */ 297static int check_media_type; 298/* automatically restart mrw format */ 299static int mrw_format_restart = 1; 300module_param(debug, bool, 0); 301module_param(autoclose, bool, 0); 302module_param(autoeject, bool, 0); 303module_param(lockdoor, bool, 0); 304module_param(check_media_type, bool, 0); 305module_param(mrw_format_restart, bool, 0); 306 307static DEFINE_MUTEX(cdrom_mutex); 308 309static const char *mrw_format_status[] = { 310 "not mrw", 311 "bgformat inactive", 312 "bgformat active", 313 "mrw complete", 314}; 315 316static const char *mrw_address_space[] = { "DMA", "GAA" }; 317 318#if (ERRLOGMASK!=CD_NOTHING) 319#define cdinfo(type, fmt, args...) \ 320do { \ 321 if ((ERRLOGMASK & type) || debug == 1) \ 322 pr_info(fmt, ##args); \ 323} while (0) 324#else 325#define cdinfo(type, fmt, args...) \ 326do { \ 327 if (0 && (ERRLOGMASK & type) || debug == 1) \ 328 pr_info(fmt, ##args); \ 329} while (0) 330#endif 331 332/* These are used to simplify getting data in from and back to user land */ 333#define IOCTL_IN(arg, type, in) \ 334 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \ 335 return -EFAULT; 336 337#define IOCTL_OUT(arg, type, out) \ 338 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \ 339 return -EFAULT; 340 341/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 342 a lot of places. This macro makes the code more clear. */ 343#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 344 345/* used in the audio ioctls */ 346#define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret 347 348/* 349 * Another popular OS uses 7 seconds as the hard timeout for default 350 * commands, so it is a good choice for us as well. 351 */ 352#define CDROM_DEF_TIMEOUT (7 * HZ) 353 354/* Not-exported routines. */ 355static int open_for_data(struct cdrom_device_info * cdi); 356static int check_for_audio_disc(struct cdrom_device_info * cdi, 357 struct cdrom_device_ops * cdo); 358static void sanitize_format(union cdrom_addr *addr, 359 u_char * curr, u_char requested); 360static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 361 unsigned long arg); 362 363int cdrom_get_last_written(struct cdrom_device_info *, long *); 364static int cdrom_get_next_writable(struct cdrom_device_info *, long *); 365static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*); 366 367static int cdrom_mrw_exit(struct cdrom_device_info *cdi); 368 369static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); 370 371static void cdrom_sysctl_register(void); 372 373static LIST_HEAD(cdrom_list); 374 375static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 376 struct packet_command *cgc) 377{ 378 if (cgc->sense) { 379 cgc->sense->sense_key = 0x05; 380 cgc->sense->asc = 0x20; 381 cgc->sense->ascq = 0x00; 382 } 383 384 cgc->stat = -EIO; 385 return -EIO; 386} 387 388/* This macro makes sure we don't have to check on cdrom_device_ops 389 * existence in the run-time routines below. Change_capability is a 390 * hack to have the capability flags defined const, while we can still 391 * change it here without gcc complaining at every line. 392 */ 393#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits) 394 395int register_cdrom(struct cdrom_device_info *cdi) 396{ 397 static char banner_printed; 398 struct cdrom_device_ops *cdo = cdi->ops; 399 int *change_capability = (int *)&cdo->capability; /* hack */ 400 401 cdinfo(CD_OPEN, "entering register_cdrom\n"); 402 403 if (cdo->open == NULL || cdo->release == NULL) 404 return -EINVAL; 405 if (!banner_printed) { 406 pr_info("Uniform CD-ROM driver " REVISION "\n"); 407 banner_printed = 1; 408 cdrom_sysctl_register(); 409 } 410 411 ENSURE(drive_status, CDC_DRIVE_STATUS ); 412 ENSURE(media_changed, CDC_MEDIA_CHANGED); 413 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 414 ENSURE(lock_door, CDC_LOCK); 415 ENSURE(select_speed, CDC_SELECT_SPEED); 416 ENSURE(get_last_session, CDC_MULTI_SESSION); 417 ENSURE(get_mcn, CDC_MCN); 418 ENSURE(reset, CDC_RESET); 419 ENSURE(generic_packet, CDC_GENERIC_PACKET); 420 cdi->mc_flags = 0; 421 cdo->n_minors = 0; 422 cdi->options = CDO_USE_FFLAGS; 423 424 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY)) 425 cdi->options |= (int) CDO_AUTO_CLOSE; 426 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY)) 427 cdi->options |= (int) CDO_AUTO_EJECT; 428 if (lockdoor==1) 429 cdi->options |= (int) CDO_LOCK; 430 if (check_media_type==1) 431 cdi->options |= (int) CDO_CHECK_TYPE; 432 433 if (CDROM_CAN(CDC_MRW_W)) 434 cdi->exit = cdrom_mrw_exit; 435 436 if (cdi->disk) 437 cdi->cdda_method = CDDA_BPC_FULL; 438 else 439 cdi->cdda_method = CDDA_OLD; 440 441 if (!cdo->generic_packet) 442 cdo->generic_packet = cdrom_dummy_generic_packet; 443 444 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 445 mutex_lock(&cdrom_mutex); 446 list_add(&cdi->list, &cdrom_list); 447 mutex_unlock(&cdrom_mutex); 448 return 0; 449} 450#undef ENSURE 451 452void unregister_cdrom(struct cdrom_device_info *cdi) 453{ 454 cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 455 456 mutex_lock(&cdrom_mutex); 457 list_del(&cdi->list); 458 mutex_unlock(&cdrom_mutex); 459 460 if (cdi->exit) 461 cdi->exit(cdi); 462 463 cdi->ops->n_minors--; 464 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 465} 466 467int cdrom_get_media_event(struct cdrom_device_info *cdi, 468 struct media_event_desc *med) 469{ 470 struct packet_command cgc; 471 unsigned char buffer[8]; 472 struct event_header *eh = (struct event_header *) buffer; 473 474 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 475 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 476 cgc.cmd[1] = 1; /* IMMED */ 477 cgc.cmd[4] = 1 << 4; /* media event */ 478 cgc.cmd[8] = sizeof(buffer); 479 cgc.quiet = 1; 480 481 if (cdi->ops->generic_packet(cdi, &cgc)) 482 return 1; 483 484 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 485 return 1; 486 487 if (eh->nea || eh->notification_class != 0x4) 488 return 1; 489 490 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 491 return 0; 492} 493 494/* 495 * the first prototypes used 0x2c as the page code for the mrw mode page, 496 * subsequently this was changed to 0x03. probe the one used by this drive 497 */ 498static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 499{ 500 struct packet_command cgc; 501 char buffer[16]; 502 503 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 504 505 cgc.timeout = HZ; 506 cgc.quiet = 1; 507 508 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 509 cdi->mrw_mode_page = MRW_MODE_PC; 510 return 0; 511 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 512 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 513 return 0; 514 } 515 516 return 1; 517} 518 519static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 520{ 521 struct packet_command cgc; 522 struct mrw_feature_desc *mfd; 523 unsigned char buffer[16]; 524 int ret; 525 526 *write = 0; 527 528 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 529 530 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 531 cgc.cmd[3] = CDF_MRW; 532 cgc.cmd[8] = sizeof(buffer); 533 cgc.quiet = 1; 534 535 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 536 return ret; 537 538 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 539 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 540 return 1; 541 *write = mfd->write; 542 543 if ((ret = cdrom_mrw_probe_pc(cdi))) { 544 *write = 0; 545 return ret; 546 } 547 548 return 0; 549} 550 551static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 552{ 553 struct packet_command cgc; 554 unsigned char buffer[12]; 555 int ret; 556 557 pr_info("%sstarting format\n", cont ? "Re" : ""); 558 559 /* 560 * FmtData bit set (bit 4), format type is 1 561 */ 562 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 563 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 564 cgc.cmd[1] = (1 << 4) | 1; 565 566 cgc.timeout = 5 * 60 * HZ; 567 568 /* 569 * 4 byte format list header, 8 byte format list descriptor 570 */ 571 buffer[1] = 1 << 1; 572 buffer[3] = 8; 573 574 /* 575 * nr_blocks field 576 */ 577 buffer[4] = 0xff; 578 buffer[5] = 0xff; 579 buffer[6] = 0xff; 580 buffer[7] = 0xff; 581 582 buffer[8] = 0x24 << 2; 583 buffer[11] = cont; 584 585 ret = cdi->ops->generic_packet(cdi, &cgc); 586 if (ret) 587 pr_info("bgformat failed\n"); 588 589 return ret; 590} 591 592static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 593{ 594 struct packet_command cgc; 595 596 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 597 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 598 599 /* 600 * Session = 1, Track = 0 601 */ 602 cgc.cmd[1] = !!immed; 603 cgc.cmd[2] = 1 << 1; 604 605 cgc.timeout = 5 * 60 * HZ; 606 607 return cdi->ops->generic_packet(cdi, &cgc); 608} 609 610static int cdrom_flush_cache(struct cdrom_device_info *cdi) 611{ 612 struct packet_command cgc; 613 614 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 615 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 616 617 cgc.timeout = 5 * 60 * HZ; 618 619 return cdi->ops->generic_packet(cdi, &cgc); 620} 621 622static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 623{ 624 disc_information di; 625 int ret; 626 627 ret = cdrom_get_disc_info(cdi, &di); 628 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 629 return 1; 630 631 ret = 0; 632 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 633 pr_info("issuing MRW background format suspend\n"); 634 ret = cdrom_mrw_bgformat_susp(cdi, 0); 635 } 636 637 if (!ret && cdi->media_written) 638 ret = cdrom_flush_cache(cdi); 639 640 return ret; 641} 642 643static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 644{ 645 struct packet_command cgc; 646 struct mode_page_header *mph; 647 char buffer[16]; 648 int ret, offset, size; 649 650 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 651 652 cgc.buffer = buffer; 653 cgc.buflen = sizeof(buffer); 654 655 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0))) 656 return ret; 657 658 mph = (struct mode_page_header *) buffer; 659 offset = be16_to_cpu(mph->desc_length); 660 size = be16_to_cpu(mph->mode_data_length) + 2; 661 662 buffer[offset + 3] = space; 663 cgc.buflen = size; 664 665 if ((ret = cdrom_mode_select(cdi, &cgc))) 666 return ret; 667 668 pr_info("%s: mrw address space %s selected\n", 669 cdi->name, mrw_address_space[space]); 670 return 0; 671} 672 673static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 674 struct rwrt_feature_desc *rfd) 675{ 676 struct packet_command cgc; 677 char buffer[24]; 678 int ret; 679 680 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 681 682 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 683 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 684 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 685 cgc.quiet = 1; 686 687 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 688 return ret; 689 690 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 691 return 0; 692} 693 694static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 695{ 696 struct packet_command cgc; 697 char buffer[16]; 698 __be16 *feature_code; 699 int ret; 700 701 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 702 703 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 704 cgc.cmd[3] = CDF_HWDM; 705 cgc.cmd[8] = sizeof(buffer); 706 cgc.quiet = 1; 707 708 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 709 return ret; 710 711 feature_code = (__be16 *) &buffer[sizeof(struct feature_header)]; 712 if (be16_to_cpu(*feature_code) == CDF_HWDM) 713 return 0; 714 715 return 1; 716} 717 718 719static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 720{ 721 struct rwrt_feature_desc rfd; 722 int ret; 723 724 *write = 0; 725 726 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 727 return ret; 728 729 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 730 *write = 1; 731 732 return 0; 733} 734 735static int cdrom_media_erasable(struct cdrom_device_info *cdi) 736{ 737 disc_information di; 738 int ret; 739 740 ret = cdrom_get_disc_info(cdi, &di); 741 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 742 return -1; 743 744 return di.erasable; 745} 746 747static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 748{ 749 int ret = cdrom_media_erasable(cdi); 750 751 /* 752 * allow writable open if media info read worked and media is 753 * erasable, _or_ if it fails since not all drives support it 754 */ 755 if (!ret) 756 return 1; 757 758 return 0; 759} 760 761static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 762{ 763 disc_information di; 764 int ret; 765 766 /* 767 * always reset to DMA lba space on open 768 */ 769 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 770 pr_err("failed setting lba address space\n"); 771 return 1; 772 } 773 774 ret = cdrom_get_disc_info(cdi, &di); 775 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 776 return 1; 777 778 if (!di.erasable) 779 return 1; 780 781 /* 782 * mrw_status 783 * 0 - not MRW formatted 784 * 1 - MRW bgformat started, but not running or complete 785 * 2 - MRW bgformat in progress 786 * 3 - MRW formatting complete 787 */ 788 ret = 0; 789 pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]); 790 if (!di.mrw_status) 791 ret = 1; 792 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 793 mrw_format_restart) 794 ret = cdrom_mrw_bgformat(cdi, 1); 795 796 return ret; 797} 798 799static int mo_open_write(struct cdrom_device_info *cdi) 800{ 801 struct packet_command cgc; 802 char buffer[255]; 803 int ret; 804 805 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 806 cgc.quiet = 1; 807 808 /* 809 * obtain write protect information as per 810 * drivers/scsi/sd.c:sd_read_write_protect_flag 811 */ 812 813 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 814 if (ret) 815 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 816 if (ret) { 817 cgc.buflen = 255; 818 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 819 } 820 821 /* drive gave us no info, let the user go ahead */ 822 if (ret) 823 return 0; 824 825 return buffer[3] & 0x80; 826} 827 828static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 829{ 830 struct rwrt_feature_desc rfd; 831 int ret; 832 833 if ((ret = cdrom_has_defect_mgt(cdi))) 834 return ret; 835 836 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 837 return ret; 838 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 839 ret = !rfd.curr; 840 841 cdinfo(CD_OPEN, "can open for random write\n"); 842 return ret; 843} 844 845static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 846{ 847 struct packet_command cgc; 848 char buffer[32]; 849 int ret, mmc3_profile; 850 851 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 852 853 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 854 cgc.cmd[1] = 0; 855 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 856 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 857 cgc.quiet = 1; 858 859 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 860 mmc3_profile = 0xffff; 861 else 862 mmc3_profile = (buffer[6] << 8) | buffer[7]; 863 864 cdi->mmc3_profile = mmc3_profile; 865} 866 867static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 868{ 869 switch (cdi->mmc3_profile) { 870 case 0x12: /* DVD-RAM */ 871 case 0x1A: /* DVD+RW */ 872 return 0; 873 default: 874 return 1; 875 } 876} 877 878/* 879 * returns 0 for ok to open write, non-0 to disallow 880 */ 881static int cdrom_open_write(struct cdrom_device_info *cdi) 882{ 883 int mrw, mrw_write, ram_write; 884 int ret = 1; 885 886 mrw = 0; 887 if (!cdrom_is_mrw(cdi, &mrw_write)) 888 mrw = 1; 889 890 if (CDROM_CAN(CDC_MO_DRIVE)) 891 ram_write = 1; 892 else 893 (void) cdrom_is_random_writable(cdi, &ram_write); 894 895 if (mrw) 896 cdi->mask &= ~CDC_MRW; 897 else 898 cdi->mask |= CDC_MRW; 899 900 if (mrw_write) 901 cdi->mask &= ~CDC_MRW_W; 902 else 903 cdi->mask |= CDC_MRW_W; 904 905 if (ram_write) 906 cdi->mask &= ~CDC_RAM; 907 else 908 cdi->mask |= CDC_RAM; 909 910 if (CDROM_CAN(CDC_MRW_W)) 911 ret = cdrom_mrw_open_write(cdi); 912 else if (CDROM_CAN(CDC_DVD_RAM)) 913 ret = cdrom_dvdram_open_write(cdi); 914 else if (CDROM_CAN(CDC_RAM) && 915 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 916 ret = cdrom_ram_open_write(cdi); 917 else if (CDROM_CAN(CDC_MO_DRIVE)) 918 ret = mo_open_write(cdi); 919 else if (!cdrom_is_dvd_rw(cdi)) 920 ret = 0; 921 922 return ret; 923} 924 925static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 926{ 927 struct packet_command cgc; 928 929 if (cdi->mmc3_profile != 0x1a) { 930 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 931 return; 932 } 933 934 if (!cdi->media_written) { 935 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 936 return; 937 } 938 939 pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name); 940 941 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 942 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 943 cgc.timeout = 30*HZ; 944 cdi->ops->generic_packet(cdi, &cgc); 945 946 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 947 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 948 cgc.timeout = 3000*HZ; 949 cgc.quiet = 1; 950 cdi->ops->generic_packet(cdi, &cgc); 951 952 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 953 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 954 cgc.cmd[2] = 2; /* Close session */ 955 cgc.quiet = 1; 956 cgc.timeout = 3000*HZ; 957 cdi->ops->generic_packet(cdi, &cgc); 958 959 cdi->media_written = 0; 960} 961 962static int cdrom_close_write(struct cdrom_device_info *cdi) 963{ 964 return 0; 965} 966 967/* We use the open-option O_NONBLOCK to indicate that the 968 * purpose of opening is only for subsequent ioctl() calls; no device 969 * integrity checks are performed. 970 * 971 * We hope that all cd-player programs will adopt this convention. It 972 * is in their own interest: device control becomes a lot easier 973 * this way. 974 */ 975int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, fmode_t mode) 976{ 977 int ret; 978 979 cdinfo(CD_OPEN, "entering cdrom_open\n"); 980 981 /* if this was a O_NONBLOCK open and we should honor the flags, 982 * do a quick open without drive/disc integrity checks. */ 983 cdi->use_count++; 984 if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) { 985 ret = cdi->ops->open(cdi, 1); 986 } else { 987 ret = open_for_data(cdi); 988 if (ret) 989 goto err; 990 cdrom_mmc3_profile(cdi); 991 if (mode & FMODE_WRITE) { 992 ret = -EROFS; 993 if (cdrom_open_write(cdi)) 994 goto err_release; 995 if (!CDROM_CAN(CDC_RAM)) 996 goto err_release; 997 ret = 0; 998 cdi->media_written = 0; 999 } 1000 } 1001 1002 if (ret) 1003 goto err; 1004 1005 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1006 cdi->name, cdi->use_count); 1007 /* Do this on open. Don't wait for mount, because they might 1008 not be mounting, but opening with O_NONBLOCK */ 1009 check_disk_change(bdev); 1010 return 0; 1011err_release: 1012 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1013 cdi->ops->lock_door(cdi, 0); 1014 cdinfo(CD_OPEN, "door unlocked.\n"); 1015 } 1016 cdi->ops->release(cdi); 1017err: 1018 cdi->use_count--; 1019 return ret; 1020} 1021 1022static 1023int open_for_data(struct cdrom_device_info * cdi) 1024{ 1025 int ret; 1026 struct cdrom_device_ops *cdo = cdi->ops; 1027 tracktype tracks; 1028 cdinfo(CD_OPEN, "entering open_for_data\n"); 1029 /* Check if the driver can report drive status. If it can, we 1030 can do clever things. If it can't, well, we at least tried! */ 1031 if (cdo->drive_status != NULL) { 1032 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1033 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1034 if (ret == CDS_TRAY_OPEN) { 1035 cdinfo(CD_OPEN, "the tray is open...\n"); 1036 /* can/may i close it? */ 1037 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1038 cdi->options & CDO_AUTO_CLOSE) { 1039 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1040 ret=cdo->tray_move(cdi,0); 1041 if (ret) { 1042 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1043 /* Ignore the error from the low 1044 level driver. We don't care why it 1045 couldn't close the tray. We only care 1046 that there is no disc in the drive, 1047 since that is the _REAL_ problem here.*/ 1048 ret=-ENOMEDIUM; 1049 goto clean_up_and_return; 1050 } 1051 } else { 1052 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1053 ret=-ENOMEDIUM; 1054 goto clean_up_and_return; 1055 } 1056 /* Ok, the door should be closed now.. Check again */ 1057 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1058 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1059 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1060 cdinfo(CD_OPEN, "tray might not contain a medium.\n"); 1061 ret=-ENOMEDIUM; 1062 goto clean_up_and_return; 1063 } 1064 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1065 } 1066 /* the door should be closed now, check for the disc */ 1067 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1068 if (ret!=CDS_DISC_OK) { 1069 ret = -ENOMEDIUM; 1070 goto clean_up_and_return; 1071 } 1072 } 1073 cdrom_count_tracks(cdi, &tracks); 1074 if (tracks.error == CDS_NO_DISC) { 1075 cdinfo(CD_OPEN, "bummer. no disc.\n"); 1076 ret=-ENOMEDIUM; 1077 goto clean_up_and_return; 1078 } 1079 /* CD-Players which don't use O_NONBLOCK, workman 1080 * for example, need bit CDO_CHECK_TYPE cleared! */ 1081 if (tracks.data==0) { 1082 if (cdi->options & CDO_CHECK_TYPE) { 1083 /* give people a warning shot, now that CDO_CHECK_TYPE 1084 is the default case! */ 1085 cdinfo(CD_OPEN, "bummer. wrong media type.\n"); 1086 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1087 (unsigned int)task_pid_nr(current)); 1088 ret=-EMEDIUMTYPE; 1089 goto clean_up_and_return; 1090 } 1091 else { 1092 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n"); 1093 } 1094 } 1095 1096 cdinfo(CD_OPEN, "all seems well, opening the device.\n"); 1097 1098 /* all seems well, we can open the device */ 1099 ret = cdo->open(cdi, 0); /* open for data */ 1100 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret); 1101 /* After all this careful checking, we shouldn't have problems 1102 opening the device, but we don't want the device locked if 1103 this somehow fails... */ 1104 if (ret) { 1105 cdinfo(CD_OPEN, "open device failed.\n"); 1106 goto clean_up_and_return; 1107 } 1108 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1109 cdo->lock_door(cdi, 1); 1110 cdinfo(CD_OPEN, "door locked.\n"); 1111 } 1112 cdinfo(CD_OPEN, "device opened successfully.\n"); 1113 return ret; 1114 1115 /* Something failed. Try to unlock the drive, because some drivers 1116 (notably ide-cd) lock the drive after every command. This produced 1117 a nasty bug where after mount failed, the drive would remain locked! 1118 This ensures that the drive gets unlocked after a mount fails. This 1119 is a goto to avoid bloating the driver with redundant code. */ 1120clean_up_and_return: 1121 cdinfo(CD_OPEN, "open failed.\n"); 1122 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1123 cdo->lock_door(cdi, 0); 1124 cdinfo(CD_OPEN, "door unlocked.\n"); 1125 } 1126 return ret; 1127} 1128 1129/* This code is similar to that in open_for_data. The routine is called 1130 whenever an audio play operation is requested. 1131*/ 1132static int check_for_audio_disc(struct cdrom_device_info * cdi, 1133 struct cdrom_device_ops * cdo) 1134{ 1135 int ret; 1136 tracktype tracks; 1137 cdinfo(CD_OPEN, "entering check_for_audio_disc\n"); 1138 if (!(cdi->options & CDO_CHECK_TYPE)) 1139 return 0; 1140 if (cdo->drive_status != NULL) { 1141 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1142 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1143 if (ret == CDS_TRAY_OPEN) { 1144 cdinfo(CD_OPEN, "the tray is open...\n"); 1145 /* can/may i close it? */ 1146 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1147 cdi->options & CDO_AUTO_CLOSE) { 1148 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1149 ret=cdo->tray_move(cdi,0); 1150 if (ret) { 1151 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1152 /* Ignore the error from the low 1153 level driver. We don't care why it 1154 couldn't close the tray. We only care 1155 that there is no disc in the drive, 1156 since that is the _REAL_ problem here.*/ 1157 return -ENOMEDIUM; 1158 } 1159 } else { 1160 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1161 return -ENOMEDIUM; 1162 } 1163 /* Ok, the door should be closed now.. Check again */ 1164 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1165 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1166 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1167 return -ENOMEDIUM; 1168 } 1169 if (ret!=CDS_DISC_OK) { 1170 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n"); 1171 return -EIO; 1172 } 1173 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1174 } 1175 } 1176 cdrom_count_tracks(cdi, &tracks); 1177 if (tracks.error) 1178 return(tracks.error); 1179 1180 if (tracks.audio==0) 1181 return -EMEDIUMTYPE; 1182 1183 return 0; 1184} 1185 1186void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode) 1187{ 1188 struct cdrom_device_ops *cdo = cdi->ops; 1189 int opened_for_data; 1190 1191 cdinfo(CD_CLOSE, "entering cdrom_release\n"); 1192 1193 if (cdi->use_count > 0) 1194 cdi->use_count--; 1195 1196 if (cdi->use_count == 0) { 1197 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name); 1198 cdrom_dvd_rw_close_write(cdi); 1199 1200 if ((cdo->capability & CDC_LOCK) && !keeplocked) { 1201 cdinfo(CD_CLOSE, "Unlocking door!\n"); 1202 cdo->lock_door(cdi, 0); 1203 } 1204 } 1205 1206 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1207 !(mode & FMODE_NDELAY); 1208 1209 /* 1210 * flush cache on last write release 1211 */ 1212 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1213 cdrom_close_write(cdi); 1214 1215 cdo->release(cdi); 1216 if (cdi->use_count == 0) { /* last process that closes dev*/ 1217 if (opened_for_data && 1218 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1219 cdo->tray_move(cdi, 1); 1220 } 1221} 1222 1223static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1224 struct cdrom_changer_info *buf) 1225{ 1226 struct packet_command cgc; 1227 struct cdrom_device_ops *cdo = cdi->ops; 1228 int length; 1229 1230 /* 1231 * Sanyo changer isn't spec compliant (doesn't use regular change 1232 * LOAD_UNLOAD command, and it doesn't implement the mech status 1233 * command below 1234 */ 1235 if (cdi->sanyo_slot) { 1236 buf->hdr.nslots = 3; 1237 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1238 for (length = 0; length < 3; length++) { 1239 buf->slots[length].disc_present = 1; 1240 buf->slots[length].change = 0; 1241 } 1242 return 0; 1243 } 1244 1245 length = sizeof(struct cdrom_mechstat_header) + 1246 cdi->capacity * sizeof(struct cdrom_slot); 1247 1248 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1249 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1250 cgc.cmd[8] = (length >> 8) & 0xff; 1251 cgc.cmd[9] = length & 0xff; 1252 return cdo->generic_packet(cdi, &cgc); 1253} 1254 1255static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1256{ 1257 struct cdrom_changer_info *info; 1258 int ret; 1259 1260 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 1261 if (cdi->sanyo_slot) 1262 return CDS_NO_INFO; 1263 1264 info = kmalloc(sizeof(*info), GFP_KERNEL); 1265 if (!info) 1266 return -ENOMEM; 1267 1268 if ((ret = cdrom_read_mech_status(cdi, info))) 1269 goto out_free; 1270 1271 if (info->slots[slot].disc_present) 1272 ret = CDS_DISC_OK; 1273 else 1274 ret = CDS_NO_DISC; 1275 1276out_free: 1277 kfree(info); 1278 return ret; 1279} 1280 1281/* Return the number of slots for an ATAPI/SCSI cdrom, 1282 * return 1 if not a changer. 1283 */ 1284int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1285{ 1286 int status; 1287 int nslots = 1; 1288 struct cdrom_changer_info *info; 1289 1290 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1291 /* cdrom_read_mech_status requires a valid value for capacity: */ 1292 cdi->capacity = 0; 1293 1294 info = kmalloc(sizeof(*info), GFP_KERNEL); 1295 if (!info) 1296 return -ENOMEM; 1297 1298 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1299 nslots = info->hdr.nslots; 1300 1301 kfree(info); 1302 return nslots; 1303} 1304 1305 1306/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1307static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1308{ 1309 struct packet_command cgc; 1310 1311 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n"); 1312 if (cdi->sanyo_slot && slot < 0) 1313 return 0; 1314 1315 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1316 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1317 cgc.cmd[4] = 2 + (slot >= 0); 1318 cgc.cmd[8] = slot; 1319 cgc.timeout = 60 * HZ; 1320 1321 /* The Sanyo 3 CD changer uses byte 7 of the 1322 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1323 using the GPCMD_LOAD_UNLOAD opcode. */ 1324 if (cdi->sanyo_slot && -1 < slot) { 1325 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1326 cgc.cmd[7] = slot; 1327 cgc.cmd[4] = cgc.cmd[8] = 0; 1328 cdi->sanyo_slot = slot ? slot : 3; 1329 } 1330 1331 return cdi->ops->generic_packet(cdi, &cgc); 1332} 1333 1334static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1335{ 1336 struct cdrom_changer_info *info; 1337 int curslot; 1338 int ret; 1339 1340 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n"); 1341 if (!CDROM_CAN(CDC_SELECT_DISC)) 1342 return -EDRIVE_CANT_DO_THIS; 1343 1344 (void) cdi->ops->media_changed(cdi, slot); 1345 1346 if (slot == CDSL_NONE) { 1347 /* set media changed bits, on both queues */ 1348 cdi->mc_flags = 0x3; 1349 return cdrom_load_unload(cdi, -1); 1350 } 1351 1352 info = kmalloc(sizeof(*info), GFP_KERNEL); 1353 if (!info) 1354 return -ENOMEM; 1355 1356 if ((ret = cdrom_read_mech_status(cdi, info))) { 1357 kfree(info); 1358 return ret; 1359 } 1360 1361 curslot = info->hdr.curslot; 1362 kfree(info); 1363 1364 if (cdi->use_count > 1 || keeplocked) { 1365 if (slot == CDSL_CURRENT) { 1366 return curslot; 1367 } else { 1368 return -EBUSY; 1369 } 1370 } 1371 1372 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1373 which is useful if it had been previously unloaded. 1374 Whether it can or not, it returns the current slot. 1375 Similarly, if slot happens to be the current one, we still 1376 try and load it. */ 1377 if (slot == CDSL_CURRENT) 1378 slot = curslot; 1379 1380 /* set media changed bits on both queues */ 1381 cdi->mc_flags = 0x3; 1382 if ((ret = cdrom_load_unload(cdi, slot))) 1383 return ret; 1384 1385 return slot; 1386} 1387 1388/* We want to make media_changed accessible to the user through an 1389 * ioctl. The main problem now is that we must double-buffer the 1390 * low-level implementation, to assure that the VFS and the user both 1391 * see a medium change once. 1392 */ 1393 1394static 1395int media_changed(struct cdrom_device_info *cdi, int queue) 1396{ 1397 unsigned int mask = (1 << (queue & 1)); 1398 int ret = !!(cdi->mc_flags & mask); 1399 1400 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1401 return ret; 1402 /* changed since last call? */ 1403 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) { 1404 cdi->mc_flags = 0x3; /* set bit on both queues */ 1405 ret |= 1; 1406 cdi->media_written = 0; 1407 } 1408 cdi->mc_flags &= ~mask; /* clear bit */ 1409 return ret; 1410} 1411 1412int cdrom_media_changed(struct cdrom_device_info *cdi) 1413{ 1414 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1415 * Returning "0" is always safe (media hasn't been changed). Do that 1416 * if the low-level cdrom driver dosn't support media changed. */ 1417 if (cdi == NULL || cdi->ops->media_changed == NULL) 1418 return 0; 1419 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1420 return 0; 1421 return media_changed(cdi, 0); 1422} 1423 1424/* badly broken, I know. Is due for a fixup anytime. */ 1425static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks) 1426{ 1427 struct cdrom_tochdr header; 1428 struct cdrom_tocentry entry; 1429 int ret, i; 1430 tracks->data=0; 1431 tracks->audio=0; 1432 tracks->cdi=0; 1433 tracks->xa=0; 1434 tracks->error=0; 1435 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1436 /* Grab the TOC header so we can see how many tracks there are */ 1437 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) { 1438 if (ret == -ENOMEDIUM) 1439 tracks->error = CDS_NO_DISC; 1440 else 1441 tracks->error = CDS_NO_INFO; 1442 return; 1443 } 1444 /* check what type of tracks are on this disc */ 1445 entry.cdte_format = CDROM_MSF; 1446 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1447 entry.cdte_track = i; 1448 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1449 tracks->error=CDS_NO_INFO; 1450 return; 1451 } 1452 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1453 if (entry.cdte_format == 0x10) 1454 tracks->cdi++; 1455 else if (entry.cdte_format == 0x20) 1456 tracks->xa++; 1457 else 1458 tracks->data++; 1459 } else 1460 tracks->audio++; 1461 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1462 i, entry.cdte_format, entry.cdte_ctrl); 1463 } 1464 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1465 header.cdth_trk1, tracks->audio, tracks->data, 1466 tracks->cdi, tracks->xa); 1467} 1468 1469/* Requests to the low-level drivers will /always/ be done in the 1470 following format convention: 1471 1472 CDROM_LBA: all data-related requests. 1473 CDROM_MSF: all audio-related requests. 1474 1475 However, a low-level implementation is allowed to refuse this 1476 request, and return information in its own favorite format. 1477 1478 It doesn't make sense /at all/ to ask for a play_audio in LBA 1479 format, or ask for multi-session info in MSF format. However, for 1480 backward compatibility these format requests will be satisfied, but 1481 the requests to the low-level drivers will be sanitized in the more 1482 meaningful format indicated above. 1483 */ 1484 1485static 1486void sanitize_format(union cdrom_addr *addr, 1487 u_char * curr, u_char requested) 1488{ 1489 if (*curr == requested) 1490 return; /* nothing to be done! */ 1491 if (requested == CDROM_LBA) { 1492 addr->lba = (int) addr->msf.frame + 1493 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1494 } else { /* CDROM_MSF */ 1495 int lba = addr->lba; 1496 addr->msf.frame = lba % 75; 1497 lba /= 75; 1498 lba += 2; 1499 addr->msf.second = lba % 60; 1500 addr->msf.minute = lba / 60; 1501 } 1502 *curr = requested; 1503} 1504 1505void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1506 int type) 1507{ 1508 memset(cgc, 0, sizeof(struct packet_command)); 1509 if (buf) 1510 memset(buf, 0, len); 1511 cgc->buffer = (char *) buf; 1512 cgc->buflen = len; 1513 cgc->data_direction = type; 1514 cgc->timeout = CDROM_DEF_TIMEOUT; 1515} 1516 1517/* DVD handling */ 1518 1519#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1520#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1521 1522static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1523{ 1524 cgc->cmd[0] = GPCMD_REPORT_KEY; 1525 cgc->cmd[10] = type | (agid << 6); 1526 switch (type) { 1527 case 0: case 8: case 5: { 1528 cgc->buflen = 8; 1529 break; 1530 } 1531 case 1: { 1532 cgc->buflen = 16; 1533 break; 1534 } 1535 case 2: case 4: { 1536 cgc->buflen = 12; 1537 break; 1538 } 1539 } 1540 cgc->cmd[9] = cgc->buflen; 1541 cgc->data_direction = CGC_DATA_READ; 1542} 1543 1544static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1545{ 1546 cgc->cmd[0] = GPCMD_SEND_KEY; 1547 cgc->cmd[10] = type | (agid << 6); 1548 switch (type) { 1549 case 1: { 1550 cgc->buflen = 16; 1551 break; 1552 } 1553 case 3: { 1554 cgc->buflen = 12; 1555 break; 1556 } 1557 case 6: { 1558 cgc->buflen = 8; 1559 break; 1560 } 1561 } 1562 cgc->cmd[9] = cgc->buflen; 1563 cgc->data_direction = CGC_DATA_WRITE; 1564} 1565 1566static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1567{ 1568 int ret; 1569 u_char buf[20]; 1570 struct packet_command cgc; 1571 struct cdrom_device_ops *cdo = cdi->ops; 1572 rpc_state_t rpc_state; 1573 1574 memset(buf, 0, sizeof(buf)); 1575 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1576 1577 switch (ai->type) { 1578 /* LU data send */ 1579 case DVD_LU_SEND_AGID: 1580 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1581 cgc.quiet = 1; 1582 setup_report_key(&cgc, ai->lsa.agid, 0); 1583 1584 if ((ret = cdo->generic_packet(cdi, &cgc))) 1585 return ret; 1586 1587 ai->lsa.agid = buf[7] >> 6; 1588 /* Returning data, let host change state */ 1589 break; 1590 1591 case DVD_LU_SEND_KEY1: 1592 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1593 setup_report_key(&cgc, ai->lsk.agid, 2); 1594 1595 if ((ret = cdo->generic_packet(cdi, &cgc))) 1596 return ret; 1597 1598 copy_key(ai->lsk.key, &buf[4]); 1599 /* Returning data, let host change state */ 1600 break; 1601 1602 case DVD_LU_SEND_CHALLENGE: 1603 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1604 setup_report_key(&cgc, ai->lsc.agid, 1); 1605 1606 if ((ret = cdo->generic_packet(cdi, &cgc))) 1607 return ret; 1608 1609 copy_chal(ai->lsc.chal, &buf[4]); 1610 /* Returning data, let host change state */ 1611 break; 1612 1613 /* Post-auth key */ 1614 case DVD_LU_SEND_TITLE_KEY: 1615 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1616 cgc.quiet = 1; 1617 setup_report_key(&cgc, ai->lstk.agid, 4); 1618 cgc.cmd[5] = ai->lstk.lba; 1619 cgc.cmd[4] = ai->lstk.lba >> 8; 1620 cgc.cmd[3] = ai->lstk.lba >> 16; 1621 cgc.cmd[2] = ai->lstk.lba >> 24; 1622 1623 if ((ret = cdo->generic_packet(cdi, &cgc))) 1624 return ret; 1625 1626 ai->lstk.cpm = (buf[4] >> 7) & 1; 1627 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1628 ai->lstk.cgms = (buf[4] >> 4) & 3; 1629 copy_key(ai->lstk.title_key, &buf[5]); 1630 /* Returning data, let host change state */ 1631 break; 1632 1633 case DVD_LU_SEND_ASF: 1634 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1635 setup_report_key(&cgc, ai->lsasf.agid, 5); 1636 1637 if ((ret = cdo->generic_packet(cdi, &cgc))) 1638 return ret; 1639 1640 ai->lsasf.asf = buf[7] & 1; 1641 break; 1642 1643 /* LU data receive (LU changes state) */ 1644 case DVD_HOST_SEND_CHALLENGE: 1645 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1646 setup_send_key(&cgc, ai->hsc.agid, 1); 1647 buf[1] = 0xe; 1648 copy_chal(&buf[4], ai->hsc.chal); 1649 1650 if ((ret = cdo->generic_packet(cdi, &cgc))) 1651 return ret; 1652 1653 ai->type = DVD_LU_SEND_KEY1; 1654 break; 1655 1656 case DVD_HOST_SEND_KEY2: 1657 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1658 setup_send_key(&cgc, ai->hsk.agid, 3); 1659 buf[1] = 0xa; 1660 copy_key(&buf[4], ai->hsk.key); 1661 1662 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1663 ai->type = DVD_AUTH_FAILURE; 1664 return ret; 1665 } 1666 ai->type = DVD_AUTH_ESTABLISHED; 1667 break; 1668 1669 /* Misc */ 1670 case DVD_INVALIDATE_AGID: 1671 cgc.quiet = 1; 1672 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1673 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1674 if ((ret = cdo->generic_packet(cdi, &cgc))) 1675 return ret; 1676 break; 1677 1678 /* Get region settings */ 1679 case DVD_LU_SEND_RPC_STATE: 1680 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1681 setup_report_key(&cgc, 0, 8); 1682 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1683 cgc.buffer = (char *) &rpc_state; 1684 1685 if ((ret = cdo->generic_packet(cdi, &cgc))) 1686 return ret; 1687 1688 ai->lrpcs.type = rpc_state.type_code; 1689 ai->lrpcs.vra = rpc_state.vra; 1690 ai->lrpcs.ucca = rpc_state.ucca; 1691 ai->lrpcs.region_mask = rpc_state.region_mask; 1692 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1693 break; 1694 1695 /* Set region settings */ 1696 case DVD_HOST_SEND_RPC_STATE: 1697 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1698 setup_send_key(&cgc, 0, 6); 1699 buf[1] = 6; 1700 buf[4] = ai->hrpcs.pdrc; 1701 1702 if ((ret = cdo->generic_packet(cdi, &cgc))) 1703 return ret; 1704 break; 1705 1706 default: 1707 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1708 return -ENOTTY; 1709 } 1710 1711 return 0; 1712} 1713 1714static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s, 1715 struct packet_command *cgc) 1716{ 1717 unsigned char buf[21], *base; 1718 struct dvd_layer *layer; 1719 struct cdrom_device_ops *cdo = cdi->ops; 1720 int ret, layer_num = s->physical.layer_num; 1721 1722 if (layer_num >= DVD_LAYERS) 1723 return -EINVAL; 1724 1725 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1726 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1727 cgc->cmd[6] = layer_num; 1728 cgc->cmd[7] = s->type; 1729 cgc->cmd[9] = cgc->buflen & 0xff; 1730 1731 /* 1732 * refrain from reporting errors on non-existing layers (mainly) 1733 */ 1734 cgc->quiet = 1; 1735 1736 ret = cdo->generic_packet(cdi, cgc); 1737 if (ret) 1738 return ret; 1739 1740 base = &buf[4]; 1741 layer = &s->physical.layer[layer_num]; 1742 1743 /* 1744 * place the data... really ugly, but at least we won't have to 1745 * worry about endianess in userspace. 1746 */ 1747 memset(layer, 0, sizeof(*layer)); 1748 layer->book_version = base[0] & 0xf; 1749 layer->book_type = base[0] >> 4; 1750 layer->min_rate = base[1] & 0xf; 1751 layer->disc_size = base[1] >> 4; 1752 layer->layer_type = base[2] & 0xf; 1753 layer->track_path = (base[2] >> 4) & 1; 1754 layer->nlayers = (base[2] >> 5) & 3; 1755 layer->track_density = base[3] & 0xf; 1756 layer->linear_density = base[3] >> 4; 1757 layer->start_sector = base[5] << 16 | base[6] << 8 | base[7]; 1758 layer->end_sector = base[9] << 16 | base[10] << 8 | base[11]; 1759 layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15]; 1760 layer->bca = base[16] >> 7; 1761 1762 return 0; 1763} 1764 1765static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s, 1766 struct packet_command *cgc) 1767{ 1768 int ret; 1769 u_char buf[8]; 1770 struct cdrom_device_ops *cdo = cdi->ops; 1771 1772 init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ); 1773 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1774 cgc->cmd[6] = s->copyright.layer_num; 1775 cgc->cmd[7] = s->type; 1776 cgc->cmd[8] = cgc->buflen >> 8; 1777 cgc->cmd[9] = cgc->buflen & 0xff; 1778 1779 ret = cdo->generic_packet(cdi, cgc); 1780 if (ret) 1781 return ret; 1782 1783 s->copyright.cpst = buf[4]; 1784 s->copyright.rmi = buf[5]; 1785 1786 return 0; 1787} 1788 1789static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s, 1790 struct packet_command *cgc) 1791{ 1792 int ret, size; 1793 u_char *buf; 1794 struct cdrom_device_ops *cdo = cdi->ops; 1795 1796 size = sizeof(s->disckey.value) + 4; 1797 1798 buf = kmalloc(size, GFP_KERNEL); 1799 if (!buf) 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 ret = cdo->generic_packet(cdi, cgc); 1810 if (!ret) 1811 memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value)); 1812 1813 kfree(buf); 1814 return ret; 1815} 1816 1817static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s, 1818 struct packet_command *cgc) 1819{ 1820 int ret, size = 4 + 188; 1821 u_char *buf; 1822 struct cdrom_device_ops *cdo = cdi->ops; 1823 1824 buf = kmalloc(size, GFP_KERNEL); 1825 if (!buf) 1826 return -ENOMEM; 1827 1828 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1829 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1830 cgc->cmd[7] = s->type; 1831 cgc->cmd[9] = cgc->buflen & 0xff; 1832 1833 ret = cdo->generic_packet(cdi, cgc); 1834 if (ret) 1835 goto out; 1836 1837 s->bca.len = buf[0] << 8 | buf[1]; 1838 if (s->bca.len < 12 || s->bca.len > 188) { 1839 cdinfo(CD_WARNING, "Received invalid BCA length (%d)\n", s->bca.len); 1840 ret = -EIO; 1841 goto out; 1842 } 1843 memcpy(s->bca.value, &buf[4], s->bca.len); 1844 ret = 0; 1845out: 1846 kfree(buf); 1847 return ret; 1848} 1849 1850static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s, 1851 struct packet_command *cgc) 1852{ 1853 int ret = 0, size; 1854 u_char *buf; 1855 struct cdrom_device_ops *cdo = cdi->ops; 1856 1857 size = sizeof(s->manufact.value) + 4; 1858 1859 buf = kmalloc(size, GFP_KERNEL); 1860 if (!buf) 1861 return -ENOMEM; 1862 1863 init_cdrom_command(cgc, buf, size, CGC_DATA_READ); 1864 cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1865 cgc->cmd[7] = s->type; 1866 cgc->cmd[8] = size >> 8; 1867 cgc->cmd[9] = size & 0xff; 1868 1869 ret = cdo->generic_packet(cdi, cgc); 1870 if (ret) 1871 goto out; 1872 1873 s->manufact.len = buf[0] << 8 | buf[1]; 1874 if (s->manufact.len < 0 || s->manufact.len > 2048) { 1875 cdinfo(CD_WARNING, "Received invalid manufacture info length" 1876 " (%d)\n", s->manufact.len); 1877 ret = -EIO; 1878 } else { 1879 memcpy(s->manufact.value, &buf[4], s->manufact.len); 1880 } 1881 1882out: 1883 kfree(buf); 1884 return ret; 1885} 1886 1887static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s, 1888 struct packet_command *cgc) 1889{ 1890 switch (s->type) { 1891 case DVD_STRUCT_PHYSICAL: 1892 return dvd_read_physical(cdi, s, cgc); 1893 1894 case DVD_STRUCT_COPYRIGHT: 1895 return dvd_read_copyright(cdi, s, cgc); 1896 1897 case DVD_STRUCT_DISCKEY: 1898 return dvd_read_disckey(cdi, s, cgc); 1899 1900 case DVD_STRUCT_BCA: 1901 return dvd_read_bca(cdi, s, cgc); 1902 1903 case DVD_STRUCT_MANUFACT: 1904 return dvd_read_manufact(cdi, s, cgc); 1905 1906 default: 1907 cdinfo(CD_WARNING, ": Invalid DVD structure read requested (%d)\n", 1908 s->type); 1909 return -EINVAL; 1910 } 1911} 1912 1913int cdrom_mode_sense(struct cdrom_device_info *cdi, 1914 struct packet_command *cgc, 1915 int page_code, int page_control) 1916{ 1917 struct cdrom_device_ops *cdo = cdi->ops; 1918 1919 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1920 1921 cgc->cmd[0] = GPCMD_MODE_SENSE_10; 1922 cgc->cmd[2] = page_code | (page_control << 6); 1923 cgc->cmd[7] = cgc->buflen >> 8; 1924 cgc->cmd[8] = cgc->buflen & 0xff; 1925 cgc->data_direction = CGC_DATA_READ; 1926 return cdo->generic_packet(cdi, cgc); 1927} 1928 1929int cdrom_mode_select(struct cdrom_device_info *cdi, 1930 struct packet_command *cgc) 1931{ 1932 struct cdrom_device_ops *cdo = cdi->ops; 1933 1934 memset(cgc->cmd, 0, sizeof(cgc->cmd)); 1935 memset(cgc->buffer, 0, 2); 1936 cgc->cmd[0] = GPCMD_MODE_SELECT_10; 1937 cgc->cmd[1] = 0x10; /* PF */ 1938 cgc->cmd[7] = cgc->buflen >> 8; 1939 cgc->cmd[8] = cgc->buflen & 0xff; 1940 cgc->data_direction = CGC_DATA_WRITE; 1941 return cdo->generic_packet(cdi, cgc); 1942} 1943 1944static int cdrom_read_subchannel(struct cdrom_device_info *cdi, 1945 struct cdrom_subchnl *subchnl, int mcn) 1946{ 1947 struct cdrom_device_ops *cdo = cdi->ops; 1948 struct packet_command cgc; 1949 char buffer[32]; 1950 int ret; 1951 1952 init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ); 1953 cgc.cmd[0] = GPCMD_READ_SUBCHANNEL; 1954 cgc.cmd[1] = 2; /* MSF addressing */ 1955 cgc.cmd[2] = 0x40; /* request subQ data */ 1956 cgc.cmd[3] = mcn ? 2 : 1; 1957 cgc.cmd[8] = 16; 1958 1959 if ((ret = cdo->generic_packet(cdi, &cgc))) 1960 return ret; 1961 1962 subchnl->cdsc_audiostatus = cgc.buffer[1]; 1963 subchnl->cdsc_format = CDROM_MSF; 1964 subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf; 1965 subchnl->cdsc_trk = cgc.buffer[6]; 1966 subchnl->cdsc_ind = cgc.buffer[7]; 1967 1968 subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13]; 1969 subchnl->cdsc_reladdr.msf.second = cgc.buffer[14]; 1970 subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15]; 1971 subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9]; 1972 subchnl->cdsc_absaddr.msf.second = cgc.buffer[10]; 1973 subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11]; 1974 1975 return 0; 1976} 1977 1978/* 1979 * Specific READ_10 interface 1980 */ 1981static int cdrom_read_cd(struct cdrom_device_info *cdi, 1982 struct packet_command *cgc, int lba, 1983 int blocksize, int nblocks) 1984{ 1985 struct cdrom_device_ops *cdo = cdi->ops; 1986 1987 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 1988 cgc->cmd[0] = GPCMD_READ_10; 1989 cgc->cmd[2] = (lba >> 24) & 0xff; 1990 cgc->cmd[3] = (lba >> 16) & 0xff; 1991 cgc->cmd[4] = (lba >> 8) & 0xff; 1992 cgc->cmd[5] = lba & 0xff; 1993 cgc->cmd[6] = (nblocks >> 16) & 0xff; 1994 cgc->cmd[7] = (nblocks >> 8) & 0xff; 1995 cgc->cmd[8] = nblocks & 0xff; 1996 cgc->buflen = blocksize * nblocks; 1997 return cdo->generic_packet(cdi, cgc); 1998} 1999 2000/* very generic interface for reading the various types of blocks */ 2001static int cdrom_read_block(struct cdrom_device_info *cdi, 2002 struct packet_command *cgc, 2003 int lba, int nblocks, int format, int blksize) 2004{ 2005 struct cdrom_device_ops *cdo = cdi->ops; 2006 2007 memset(&cgc->cmd, 0, sizeof(cgc->cmd)); 2008 cgc->cmd[0] = GPCMD_READ_CD; 2009 /* expected sector size - cdda,mode1,etc. */ 2010 cgc->cmd[1] = format << 2; 2011 /* starting address */ 2012 cgc->cmd[2] = (lba >> 24) & 0xff; 2013 cgc->cmd[3] = (lba >> 16) & 0xff; 2014 cgc->cmd[4] = (lba >> 8) & 0xff; 2015 cgc->cmd[5] = lba & 0xff; 2016 /* number of blocks */ 2017 cgc->cmd[6] = (nblocks >> 16) & 0xff; 2018 cgc->cmd[7] = (nblocks >> 8) & 0xff; 2019 cgc->cmd[8] = nblocks & 0xff; 2020 cgc->buflen = blksize * nblocks; 2021 2022 /* set the header info returned */ 2023 switch (blksize) { 2024 case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break; 2025 case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break; 2026 case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break; 2027 default : cgc->cmd[9] = 0x10; 2028 } 2029 2030 return cdo->generic_packet(cdi, cgc); 2031} 2032 2033static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2034 int lba, int nframes) 2035{ 2036 struct packet_command cgc; 2037 int ret = 0; 2038 int nr; 2039 2040 cdi->last_sense = 0; 2041 2042 memset(&cgc, 0, sizeof(cgc)); 2043 2044 /* 2045 * start with will ra.nframes size, back down if alloc fails 2046 */ 2047 nr = nframes; 2048 do { 2049 cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL); 2050 if (cgc.buffer) 2051 break; 2052 2053 nr >>= 1; 2054 } while (nr); 2055 2056 if (!nr) 2057 return -ENOMEM; 2058 2059 if (!access_ok(VERIFY_WRITE, ubuf, nframes * CD_FRAMESIZE_RAW)) { 2060 ret = -EFAULT; 2061 goto out; 2062 } 2063 2064 cgc.data_direction = CGC_DATA_READ; 2065 while (nframes > 0) { 2066 if (nr > nframes) 2067 nr = nframes; 2068 2069 ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW); 2070 if (ret) 2071 break; 2072 if (__copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) { 2073 ret = -EFAULT; 2074 break; 2075 } 2076 ubuf += CD_FRAMESIZE_RAW * nr; 2077 nframes -= nr; 2078 lba += nr; 2079 } 2080out: 2081 kfree(cgc.buffer); 2082 return ret; 2083} 2084 2085static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2086 int lba, int nframes) 2087{ 2088 struct request_queue *q = cdi->disk->queue; 2089 struct request *rq; 2090 struct bio *bio; 2091 unsigned int len; 2092 int nr, ret = 0; 2093 2094 if (!q) 2095 return -ENXIO; 2096 2097 cdi->last_sense = 0; 2098 2099 while (nframes) { 2100 nr = nframes; 2101 if (cdi->cdda_method == CDDA_BPC_SINGLE) 2102 nr = 1; 2103 if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9)) 2104 nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW; 2105 2106 len = nr * CD_FRAMESIZE_RAW; 2107 2108 rq = blk_get_request(q, READ, GFP_KERNEL); 2109 if (!rq) { 2110 ret = -ENOMEM; 2111 break; 2112 } 2113 2114 ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL); 2115 if (ret) { 2116 blk_put_request(rq); 2117 break; 2118 } 2119 2120 rq->cmd[0] = GPCMD_READ_CD; 2121 rq->cmd[1] = 1 << 2; 2122 rq->cmd[2] = (lba >> 24) & 0xff; 2123 rq->cmd[3] = (lba >> 16) & 0xff; 2124 rq->cmd[4] = (lba >> 8) & 0xff; 2125 rq->cmd[5] = lba & 0xff; 2126 rq->cmd[6] = (nr >> 16) & 0xff; 2127 rq->cmd[7] = (nr >> 8) & 0xff; 2128 rq->cmd[8] = nr & 0xff; 2129 rq->cmd[9] = 0xf8; 2130 2131 rq->cmd_len = 12; 2132 rq->cmd_type = REQ_TYPE_BLOCK_PC; 2133 rq->timeout = 60 * HZ; 2134 bio = rq->bio; 2135 2136 if (blk_execute_rq(q, cdi->disk, rq, 0)) { 2137 struct request_sense *s = rq->sense; 2138 ret = -EIO; 2139 cdi->last_sense = s->sense_key; 2140 } 2141 2142 if (blk_rq_unmap_user(bio)) 2143 ret = -EFAULT; 2144 blk_put_request(rq); 2145 2146 if (ret) 2147 break; 2148 2149 nframes -= nr; 2150 lba += nr; 2151 ubuf += len; 2152 } 2153 2154 return ret; 2155} 2156 2157static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf, 2158 int lba, int nframes) 2159{ 2160 int ret; 2161 2162 if (cdi->cdda_method == CDDA_OLD) 2163 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2164 2165retry: 2166 /* 2167 * for anything else than success and io error, we need to retry 2168 */ 2169 ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes); 2170 if (!ret || ret != -EIO) 2171 return ret; 2172 2173 /* 2174 * I've seen drives get sense 4/8/3 udma crc errors on multi 2175 * frame dma, so drop to single frame dma if we need to 2176 */ 2177 if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) { 2178 pr_info("dropping to single frame dma\n"); 2179 cdi->cdda_method = CDDA_BPC_SINGLE; 2180 goto retry; 2181 } 2182 2183 /* 2184 * so we have an io error of some sort with multi frame dma. if the 2185 * condition wasn't a hardware error 2186 * problems, not for any error 2187 */ 2188 if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b) 2189 return ret; 2190 2191 pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense); 2192 cdi->cdda_method = CDDA_OLD; 2193 return cdrom_read_cdda_old(cdi, ubuf, lba, nframes); 2194} 2195 2196static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi, 2197 void __user *argp) 2198{ 2199 struct cdrom_multisession ms_info; 2200 u8 requested_format; 2201 int ret; 2202 2203 cdinfo(CD_DO_IOCTL, "entering CDROMMULTISESSION\n"); 2204 2205 if (!(cdi->ops->capability & CDC_MULTI_SESSION)) 2206 return -ENOSYS; 2207 2208 if (copy_from_user(&ms_info, argp, sizeof(ms_info))) 2209 return -EFAULT; 2210 2211 requested_format = ms_info.addr_format; 2212 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2213 return -EINVAL; 2214 ms_info.addr_format = CDROM_LBA; 2215 2216 ret = cdi->ops->get_last_session(cdi, &ms_info); 2217 if (ret) 2218 return ret; 2219 2220 sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format); 2221 2222 if (copy_to_user(argp, &ms_info, sizeof(ms_info))) 2223 return -EFAULT; 2224 2225 cdinfo(CD_DO_IOCTL, "CDROMMULTISESSION successful\n"); 2226 return 0; 2227} 2228 2229static int cdrom_ioctl_eject(struct cdrom_device_info *cdi) 2230{ 2231 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT\n"); 2232 2233 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2234 return -ENOSYS; 2235 if (cdi->use_count != 1 || keeplocked) 2236 return -EBUSY; 2237 if (CDROM_CAN(CDC_LOCK)) { 2238 int ret = cdi->ops->lock_door(cdi, 0); 2239 if (ret) 2240 return ret; 2241 } 2242 2243 return cdi->ops->tray_move(cdi, 1); 2244} 2245 2246static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi) 2247{ 2248 cdinfo(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n"); 2249 2250 if (!CDROM_CAN(CDC_CLOSE_TRAY)) 2251 return -ENOSYS; 2252 return cdi->ops->tray_move(cdi, 0); 2253} 2254 2255static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi, 2256 unsigned long arg) 2257{ 2258 cdinfo(CD_DO_IOCTL, "entering CDROMEJECT_SW\n"); 2259 2260 if (!CDROM_CAN(CDC_OPEN_TRAY)) 2261 return -ENOSYS; 2262 if (keeplocked) 2263 return -EBUSY; 2264 2265 cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT); 2266 if (arg) 2267 cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT; 2268 return 0; 2269} 2270 2271static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi, 2272 unsigned long arg) 2273{ 2274 struct cdrom_changer_info *info; 2275 int ret; 2276 2277 cdinfo(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n"); 2278 2279 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 2280 return -ENOSYS; 2281 2282 /* cannot select disc or select current disc */ 2283 if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT) 2284 return media_changed(cdi, 1); 2285 2286 if ((unsigned int)arg >= cdi->capacity) 2287 return -EINVAL; 2288 2289 info = kmalloc(sizeof(*info), GFP_KERNEL); 2290 if (!info) 2291 return -ENOMEM; 2292 2293 ret = cdrom_read_mech_status(cdi, info); 2294 if (!ret) 2295 ret = info->slots[arg].change; 2296 kfree(info); 2297 return ret; 2298} 2299 2300static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi, 2301 unsigned long arg) 2302{ 2303 cdinfo(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n"); 2304 2305 /* 2306 * Options need to be in sync with capability. 2307 * Too late for that, so we have to check each one separately. 2308 */ 2309 switch (arg) { 2310 case CDO_USE_FFLAGS: 2311 case CDO_CHECK_TYPE: 2312 break; 2313 case CDO_LOCK: 2314 if (!CDROM_CAN(CDC_LOCK)) 2315 return -ENOSYS; 2316 break; 2317 case 0: 2318 return cdi->options; 2319 /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */ 2320 default: 2321 if (!CDROM_CAN(arg)) 2322 return -ENOSYS; 2323 } 2324 cdi->options |= (int) arg; 2325 return cdi->options; 2326} 2327 2328static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi, 2329 unsigned long arg) 2330{ 2331 cdinfo(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n"); 2332 2333 cdi->options &= ~(int) arg; 2334 return cdi->options; 2335} 2336 2337static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi, 2338 unsigned long arg) 2339{ 2340 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n"); 2341 2342 if (!CDROM_CAN(CDC_SELECT_SPEED)) 2343 return -ENOSYS; 2344 return cdi->ops->select_speed(cdi, arg); 2345} 2346 2347static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi, 2348 unsigned long arg) 2349{ 2350 cdinfo(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n"); 2351 2352 if (!CDROM_CAN(CDC_SELECT_DISC)) 2353 return -ENOSYS; 2354 2355 if (arg != CDSL_CURRENT && arg != CDSL_NONE) { 2356 if ((int)arg >= cdi->capacity) 2357 return -EINVAL; 2358 } 2359 2360 /* 2361 * ->select_disc is a hook to allow a driver-specific way of 2362 * seleting disc. However, since there is no equivalent hook for 2363 * cdrom_slot_status this may not actually be useful... 2364 */ 2365 if (cdi->ops->select_disc) 2366 return cdi->ops->select_disc(cdi, arg); 2367 2368 cdinfo(CD_CHANGER, "Using generic cdrom_select_disc()\n"); 2369 return cdrom_select_disc(cdi, arg); 2370} 2371 2372static int cdrom_ioctl_reset(struct cdrom_device_info *cdi, 2373 struct block_device *bdev) 2374{ 2375 cdinfo(CD_DO_IOCTL, "entering CDROM_RESET\n"); 2376 2377 if (!capable(CAP_SYS_ADMIN)) 2378 return -EACCES; 2379 if (!CDROM_CAN(CDC_RESET)) 2380 return -ENOSYS; 2381 invalidate_bdev(bdev); 2382 return cdi->ops->reset(cdi); 2383} 2384 2385static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi, 2386 unsigned long arg) 2387{ 2388 cdinfo(CD_DO_IOCTL, "%socking door.\n", arg ? "L" : "Unl"); 2389 2390 if (!CDROM_CAN(CDC_LOCK)) 2391 return -EDRIVE_CANT_DO_THIS; 2392 2393 keeplocked = arg ? 1 : 0; 2394 2395 /* 2396 * Don't unlock the door on multiple opens by default, but allow 2397 * root to do so. 2398 */ 2399 if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN)) 2400 return -EBUSY; 2401 return cdi->ops->lock_door(cdi, arg); 2402} 2403 2404static int cdrom_ioctl_debug(struct cdrom_device_info *cdi, 2405 unsigned long arg) 2406{ 2407 cdinfo(CD_DO_IOCTL, "%sabling debug.\n", arg ? "En" : "Dis"); 2408 2409 if (!capable(CAP_SYS_ADMIN)) 2410 return -EACCES; 2411 debug = arg ? 1 : 0; 2412 return debug; 2413} 2414 2415static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi) 2416{ 2417 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n"); 2418 return (cdi->ops->capability & ~cdi->mask); 2419} 2420 2421/* 2422 * The following function is implemented, although very few audio 2423 * discs give Universal Product Code information, which should just be 2424 * the Medium Catalog Number on the box. Note, that the way the code 2425 * is written on the CD is /not/ uniform across all discs! 2426 */ 2427static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi, 2428 void __user *argp) 2429{ 2430 struct cdrom_mcn mcn; 2431 int ret; 2432 2433 cdinfo(CD_DO_IOCTL, "entering CDROM_GET_MCN\n"); 2434 2435 if (!(cdi->ops->capability & CDC_MCN)) 2436 return -ENOSYS; 2437 ret = cdi->ops->get_mcn(cdi, &mcn); 2438 if (ret) 2439 return ret; 2440 2441 if (copy_to_user(argp, &mcn, sizeof(mcn))) 2442 return -EFAULT; 2443 cdinfo(CD_DO_IOCTL, "CDROM_GET_MCN successful\n"); 2444 return 0; 2445} 2446 2447static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi, 2448 unsigned long arg) 2449{ 2450 cdinfo(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n"); 2451 2452 if (!(cdi->ops->capability & CDC_DRIVE_STATUS)) 2453 return -ENOSYS; 2454 if (!CDROM_CAN(CDC_SELECT_DISC) || 2455 (arg == CDSL_CURRENT || arg == CDSL_NONE)) 2456 return cdi->ops->drive_status(cdi, CDSL_CURRENT); 2457 if (((int)arg >= cdi->capacity)) 2458 return -EINVAL; 2459 return cdrom_slot_status(cdi, arg); 2460} 2461 2462/* 2463 * Ok, this is where problems start. The current interface for the 2464 * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that 2465 * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunatly, while this 2466 * is often the case, it is also very common for CDs to have some tracks 2467 * with data, and some tracks with audio. Just because I feel like it, 2468 * I declare the following to be the best way to cope. If the CD has ANY 2469 * data tracks on it, it will be returned as a data CD. If it has any XA 2470 * tracks, I will return it as that. Now I could simplify this interface 2471 * by combining these returns with the above, but this more clearly 2472 * demonstrates the problem with the current interface. Too bad this 2473 * wasn't designed to use bitmasks... -Erik 2474 * 2475 * Well, now we have the option CDS_MIXED: a mixed-type CD. 2476 * User level programmers might feel the ioctl is not very useful. 2477 * ---david 2478 */ 2479static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi) 2480{ 2481 tracktype tracks; 2482 2483 cdinfo(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n"); 2484 2485 cdrom_count_tracks(cdi, &tracks); 2486 if (tracks.error) 2487 return tracks.error; 2488 2489 /* Policy mode on */ 2490 if (tracks.audio > 0) { 2491 if (!tracks.data && !tracks.cdi && !tracks.xa) 2492 return CDS_AUDIO; 2493 else 2494 return CDS_MIXED; 2495 } 2496 2497 if (tracks.cdi > 0) 2498 return CDS_XA_2_2; 2499 if (tracks.xa > 0) 2500 return CDS_XA_2_1; 2501 if (tracks.data > 0) 2502 return CDS_DATA_1; 2503 /* Policy mode off */ 2504 2505 cdinfo(CD_WARNING,"This disc doesn't have any tracks I recognize!\n"); 2506 return CDS_NO_INFO; 2507} 2508 2509static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi) 2510{ 2511 cdinfo(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n"); 2512 return cdi->capacity; 2513} 2514 2515static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi, 2516 void __user *argp) 2517{ 2518 struct cdrom_subchnl q; 2519 u8 requested, back; 2520 int ret; 2521 2522 /* cdinfo(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/ 2523 2524 if (copy_from_user(&q, argp, sizeof(q))) 2525 return -EFAULT; 2526 2527 requested = q.cdsc_format; 2528 if (requested != CDROM_MSF && requested != CDROM_LBA) 2529 return -EINVAL; 2530 q.cdsc_format = CDROM_MSF; 2531 2532 ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q); 2533 if (ret) 2534 return ret; 2535 2536 back = q.cdsc_format; /* local copy */ 2537 sanitize_format(&q.cdsc_absaddr, &back, requested); 2538 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2539 2540 if (copy_to_user(argp, &q, sizeof(q))) 2541 return -EFAULT; 2542 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2543 return 0; 2544} 2545 2546static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi, 2547 void __user *argp) 2548{ 2549 struct cdrom_tochdr header; 2550 int ret; 2551 2552 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */ 2553 2554 if (copy_from_user(&header, argp, sizeof(header))) 2555 return -EFAULT; 2556 2557 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header); 2558 if (ret) 2559 return ret; 2560 2561 if (copy_to_user(argp, &header, sizeof(header))) 2562 return -EFAULT; 2563 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */ 2564 return 0; 2565} 2566 2567static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi, 2568 void __user *argp) 2569{ 2570 struct cdrom_tocentry entry; 2571 u8 requested_format; 2572 int ret; 2573 2574 /* cdinfo(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */ 2575 2576 if (copy_from_user(&entry, argp, sizeof(entry))) 2577 return -EFAULT; 2578 2579 requested_format = entry.cdte_format; 2580 if (requested_format != CDROM_MSF && requested_format != CDROM_LBA) 2581 return -EINVAL; 2582 /* make interface to low-level uniform */ 2583 entry.cdte_format = CDROM_MSF; 2584 ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry); 2585 if (ret) 2586 return ret; 2587 sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format); 2588 2589 if (copy_to_user(argp, &entry, sizeof(entry))) 2590 return -EFAULT; 2591 /* cdinfo(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */ 2592 return 0; 2593} 2594 2595static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi, 2596 void __user *argp) 2597{ 2598 struct cdrom_msf msf; 2599 2600 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2601 2602 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2603 return -ENOSYS; 2604 if (copy_from_user(&msf, argp, sizeof(msf))) 2605 return -EFAULT; 2606 return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf); 2607} 2608 2609static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi, 2610 void __user *argp) 2611{ 2612 struct cdrom_ti ti; 2613 int ret; 2614 2615 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n"); 2616 2617 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2618 return -ENOSYS; 2619 if (copy_from_user(&ti, argp, sizeof(ti))) 2620 return -EFAULT; 2621 2622 ret = check_for_audio_disc(cdi, cdi->ops); 2623 if (ret) 2624 return ret; 2625 return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti); 2626} 2627static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi, 2628 void __user *argp) 2629{ 2630 struct cdrom_volctrl volume; 2631 2632 cdinfo(CD_DO_IOCTL, "entering CDROMVOLCTRL\n"); 2633 2634 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2635 return -ENOSYS; 2636 if (copy_from_user(&volume, argp, sizeof(volume))) 2637 return -EFAULT; 2638 return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume); 2639} 2640 2641static int cdrom_ioctl_volread(struct cdrom_device_info *cdi, 2642 void __user *argp) 2643{ 2644 struct cdrom_volctrl volume; 2645 int ret; 2646 2647 cdinfo(CD_DO_IOCTL, "entering CDROMVOLREAD\n"); 2648 2649 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2650 return -ENOSYS; 2651 2652 ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume); 2653 if (ret) 2654 return ret; 2655 2656 if (copy_to_user(argp, &volume, sizeof(volume))) 2657 return -EFAULT; 2658 return 0; 2659} 2660 2661static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi, 2662 unsigned int cmd) 2663{ 2664 int ret; 2665 2666 cdinfo(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n"); 2667 2668 if (!CDROM_CAN(CDC_PLAY_AUDIO)) 2669 return -ENOSYS; 2670 ret = check_for_audio_disc(cdi, cdi->ops); 2671 if (ret) 2672 return ret; 2673 return cdi->ops->audio_ioctl(cdi, cmd, NULL); 2674} 2675 2676/* 2677 * Just about every imaginable ioctl is supported in the Uniform layer 2678 * these days. 2679 * ATAPI / SCSI specific code now mainly resides in mmc_ioctl(). 2680 */ 2681int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 2682 fmode_t mode, unsigned int cmd, unsigned long arg) 2683{ 2684 void __user *argp = (void __user *)arg; 2685 int ret; 2686 struct gendisk *disk = bdev->bd_disk; 2687 2688 /* 2689 * Try the generic SCSI command ioctl's first. 2690 */ 2691 ret = scsi_cmd_ioctl(disk->queue, disk, mode, cmd, argp); 2692 if (ret != -ENOTTY) 2693 return ret; 2694 2695 switch (cmd) { 2696 case CDROMMULTISESSION: 2697 return cdrom_ioctl_multisession(cdi, argp); 2698 case CDROMEJECT: 2699 return cdrom_ioctl_eject(cdi); 2700 case CDROMCLOSETRAY: 2701 return cdrom_ioctl_closetray(cdi); 2702 case CDROMEJECT_SW: 2703 return cdrom_ioctl_eject_sw(cdi, arg); 2704 case CDROM_MEDIA_CHANGED: 2705 return cdrom_ioctl_media_changed(cdi, arg); 2706 case CDROM_SET_OPTIONS: 2707 return cdrom_ioctl_set_options(cdi, arg); 2708 case CDROM_CLEAR_OPTIONS: 2709 return cdrom_ioctl_clear_options(cdi, arg); 2710 case CDROM_SELECT_SPEED: 2711 return cdrom_ioctl_select_speed(cdi, arg); 2712 case CDROM_SELECT_DISC: 2713 return cdrom_ioctl_select_disc(cdi, arg); 2714 case CDROMRESET: 2715 return cdrom_ioctl_reset(cdi, bdev); 2716 case CDROM_LOCKDOOR: 2717 return cdrom_ioctl_lock_door(cdi, arg); 2718 case CDROM_DEBUG: 2719 return cdrom_ioctl_debug(cdi, arg); 2720 case CDROM_GET_CAPABILITY: 2721 return cdrom_ioctl_get_capability(cdi); 2722 case CDROM_GET_MCN: 2723 return cdrom_ioctl_get_mcn(cdi, argp); 2724 case CDROM_DRIVE_STATUS: 2725 return cdrom_ioctl_drive_status(cdi, arg); 2726 case CDROM_DISC_STATUS: 2727 return cdrom_ioctl_disc_status(cdi); 2728 case CDROM_CHANGER_NSLOTS: 2729 return cdrom_ioctl_changer_nslots(cdi); 2730 } 2731 2732 /* 2733 * Use the ioctls that are implemented through the generic_packet() 2734 * interface. this may look at bit funny, but if -ENOTTY is 2735 * returned that particular ioctl is not implemented and we 2736 * let it go through the device specific ones. 2737 */ 2738 if (CDROM_CAN(CDC_GENERIC_PACKET)) { 2739 ret = mmc_ioctl(cdi, cmd, arg); 2740 if (ret != -ENOTTY) 2741 return ret; 2742 } 2743 2744 /* 2745 * Note: most of the cdinfo() calls are commented out here, 2746 * because they fill up the sys log when CD players poll 2747 * the drive. 2748 */ 2749 switch (cmd) { 2750 case CDROMSUBCHNL: 2751 return cdrom_ioctl_get_subchnl(cdi, argp); 2752 case CDROMREADTOCHDR: 2753 return cdrom_ioctl_read_tochdr(cdi, argp); 2754 case CDROMREADTOCENTRY: 2755 return cdrom_ioctl_read_tocentry(cdi, argp); 2756 case CDROMPLAYMSF: 2757 return cdrom_ioctl_play_msf(cdi, argp); 2758 case CDROMPLAYTRKIND: 2759 return cdrom_ioctl_play_trkind(cdi, argp); 2760 case CDROMVOLCTRL: 2761 return cdrom_ioctl_volctrl(cdi, argp); 2762 case CDROMVOLREAD: 2763 return cdrom_ioctl_volread(cdi, argp); 2764 case CDROMSTART: 2765 case CDROMSTOP: 2766 case CDROMPAUSE: 2767 case CDROMRESUME: 2768 return cdrom_ioctl_audioctl(cdi, cmd); 2769 } 2770 2771 return -ENOSYS; 2772} 2773 2774/* 2775 * Required when we need to use READ_10 to issue other than 2048 block 2776 * reads 2777 */ 2778static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size) 2779{ 2780 struct cdrom_device_ops *cdo = cdi->ops; 2781 struct packet_command cgc; 2782 struct modesel_head mh; 2783 2784 memset(&mh, 0, sizeof(mh)); 2785 mh.block_desc_length = 0x08; 2786 mh.block_length_med = (size >> 8) & 0xff; 2787 mh.block_length_lo = size & 0xff; 2788 2789 memset(&cgc, 0, sizeof(cgc)); 2790 cgc.cmd[0] = 0x15; 2791 cgc.cmd[1] = 1 << 4; 2792 cgc.cmd[4] = 12; 2793 cgc.buflen = sizeof(mh); 2794 cgc.buffer = (char *) &mh; 2795 cgc.data_direction = CGC_DATA_WRITE; 2796 mh.block_desc_length = 0x08; 2797 mh.block_length_med = (size >> 8) & 0xff; 2798 mh.block_length_lo = size & 0xff; 2799 2800 return cdo->generic_packet(cdi, &cgc); 2801} 2802 2803static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi, 2804 void __user *arg, 2805 struct packet_command *cgc, 2806 int cmd) 2807{ 2808 struct request_sense sense; 2809 struct cdrom_msf msf; 2810 int blocksize = 0, format = 0, lba; 2811 int ret; 2812 2813 switch (cmd) { 2814 case CDROMREADRAW: 2815 blocksize = CD_FRAMESIZE_RAW; 2816 break; 2817 case CDROMREADMODE1: 2818 blocksize = CD_FRAMESIZE; 2819 format = 2; 2820 break; 2821 case CDROMREADMODE2: 2822 blocksize = CD_FRAMESIZE_RAW0; 2823 break; 2824 } 2825 IOCTL_IN(arg, struct cdrom_msf, msf); 2826 lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0); 2827 if (lba < 0) 2828 return -EINVAL; 2829 2830 cgc->buffer = kmalloc(blocksize, GFP_KERNEL); 2831 if (cgc->buffer == NULL) 2832 return -ENOMEM; 2833 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 && 2839 sense.asc == 0x20 && 2840 sense.ascq == 0x00) { 2841 /* 2842 * SCSI-II devices are not required to support 2843 * READ_CD, so let's try switching block size 2844 */ 2845 ret = cdrom_switch_blocksize(cdi, blocksize); 2846 if (ret) 2847 goto out; 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(arg, cgc->buffer, blocksize)) 2853 ret = -EFAULT; 2854out: 2855 kfree(cgc->buffer); 2856 return ret; 2857} 2858 2859static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi, 2860 void __user *arg) 2861{ 2862 struct cdrom_read_audio ra; 2863 int lba; 2864 2865 IOCTL_IN(arg, struct cdrom_read_audio, ra); 2866 2867 if (ra.addr_format == CDROM_MSF) 2868 lba = msf_to_lba(ra.addr.msf.minute, 2869 ra.addr.msf.second, 2870 ra.addr.msf.frame); 2871 else if (ra.addr_format == CDROM_LBA) 2872 lba = ra.addr.lba; 2873 else 2874 return -EINVAL; 2875 2876 if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES) 2877 return -EINVAL; 2878 2879 return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes); 2880} 2881 2882static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi, 2883 void __user *arg) 2884{ 2885 int ret; 2886 struct cdrom_subchnl q; 2887 u_char requested, back; 2888 IOCTL_IN(arg, struct cdrom_subchnl, q); 2889 requested = q.cdsc_format; 2890 if (!((requested == CDROM_MSF) || 2891 (requested == CDROM_LBA))) 2892 return -EINVAL; 2893 q.cdsc_format = CDROM_MSF; 2894 ret = cdrom_read_subchannel(cdi, &q, 0); 2895 if (ret) 2896 return ret; 2897 back = q.cdsc_format; /* local copy */ 2898 sanitize_format(&q.cdsc_absaddr, &back, requested); 2899 sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested); 2900 IOCTL_OUT(arg, struct cdrom_subchnl, q); 2901 /* cdinfo(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */ 2902 return 0; 2903} 2904 2905static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi, 2906 void __user *arg, 2907 struct packet_command *cgc) 2908{ 2909 struct cdrom_device_ops *cdo = cdi->ops; 2910 struct cdrom_msf msf; 2911 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYMSF\n"); 2912 IOCTL_IN(arg, struct cdrom_msf, msf); 2913 cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF; 2914 cgc->cmd[3] = msf.cdmsf_min0; 2915 cgc->cmd[4] = msf.cdmsf_sec0; 2916 cgc->cmd[5] = msf.cdmsf_frame0; 2917 cgc->cmd[6] = msf.cdmsf_min1; 2918 cgc->cmd[7] = msf.cdmsf_sec1; 2919 cgc->cmd[8] = msf.cdmsf_frame1; 2920 cgc->data_direction = CGC_DATA_NONE; 2921 return cdo->generic_packet(cdi, cgc); 2922} 2923 2924static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi, 2925 void __user *arg, 2926 struct packet_command *cgc) 2927{ 2928 struct cdrom_device_ops *cdo = cdi->ops; 2929 struct cdrom_blk blk; 2930 cdinfo(CD_DO_IOCTL, "entering CDROMPLAYBLK\n"); 2931 IOCTL_IN(arg, struct cdrom_blk, blk); 2932 cgc->cmd[0] = GPCMD_PLAY_AUDIO_10; 2933 cgc->cmd[2] = (blk.from >> 24) & 0xff; 2934 cgc->cmd[3] = (blk.from >> 16) & 0xff; 2935 cgc->cmd[4] = (blk.from >> 8) & 0xff; 2936 cgc->cmd[5] = blk.from & 0xff; 2937 cgc->cmd[7] = (blk.len >> 8) & 0xff; 2938 cgc->cmd[8] = blk.len & 0xff; 2939 cgc->data_direction = CGC_DATA_NONE; 2940 return cdo->generic_packet(cdi, cgc); 2941} 2942 2943static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi, 2944 void __user *arg, 2945 struct packet_command *cgc, 2946 unsigned int cmd) 2947{ 2948 struct cdrom_volctrl volctrl; 2949 unsigned char buffer[32]; 2950 char mask[sizeof(buffer)]; 2951 unsigned short offset; 2952 int ret; 2953 2954 cdinfo(CD_DO_IOCTL, "entering CDROMVOLUME\n"); 2955 2956 IOCTL_IN(arg, struct cdrom_volctrl, volctrl); 2957 2958 cgc->buffer = buffer; 2959 cgc->buflen = 24; 2960 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0); 2961 if (ret) 2962 return ret; 2963 2964 /* originally the code depended on buffer[1] to determine 2965 how much data is available for transfer. buffer[1] is 2966 unfortunately ambigious and the only reliable way seem 2967 to be to simply skip over the block descriptor... */ 2968 offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6)); 2969 2970 if (offset + 16 > sizeof(buffer)) 2971 return -E2BIG; 2972 2973 if (offset + 16 > cgc->buflen) { 2974 cgc->buflen = offset + 16; 2975 ret = cdrom_mode_sense(cdi, cgc, 2976 GPMODE_AUDIO_CTL_PAGE, 0); 2977 if (ret) 2978 return ret; 2979 } 2980 2981 /* sanity check */ 2982 if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE || 2983 buffer[offset + 1] < 14) 2984 return -EINVAL; 2985 2986 /* now we have the current volume settings. if it was only 2987 a CDROMVOLREAD, return these values */ 2988 if (cmd == CDROMVOLREAD) { 2989 volctrl.channel0 = buffer[offset+9]; 2990 volctrl.channel1 = buffer[offset+11]; 2991 volctrl.channel2 = buffer[offset+13]; 2992 volctrl.channel3 = buffer[offset+15]; 2993 IOCTL_OUT(arg, struct cdrom_volctrl, volctrl); 2994 return 0; 2995 } 2996 2997 /* get the volume mask */ 2998 cgc->buffer = mask; 2999 ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1); 3000 if (ret) 3001 return ret; 3002 3003 buffer[offset + 9] = volctrl.channel0 & mask[offset + 9]; 3004 buffer[offset + 11] = volctrl.channel1 & mask[offset + 11]; 3005 buffer[offset + 13] = volctrl.channel2 & mask[offset + 13]; 3006 buffer[offset + 15] = volctrl.channel3 & mask[offset + 15]; 3007 3008 /* set volume */ 3009 cgc->buffer = buffer + offset - 8; 3010 memset(cgc->buffer, 0, 8); 3011 return cdrom_mode_select(cdi, cgc); 3012} 3013 3014static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi, 3015 struct packet_command *cgc, 3016 int cmd) 3017{ 3018 struct cdrom_device_ops *cdo = cdi->ops; 3019 cdinfo(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n"); 3020 cgc->cmd[0] = GPCMD_START_STOP_UNIT; 3021 cgc->cmd[1] = 1; 3022 cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0; 3023 cgc->data_direction = CGC_DATA_NONE; 3024 return cdo->generic_packet(cdi, cgc); 3025} 3026 3027static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi, 3028 struct packet_command *cgc, 3029 int cmd) 3030{ 3031 struct cdrom_device_ops *cdo = cdi->ops; 3032 cdinfo(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n"); 3033 cgc->cmd[0] = GPCMD_PAUSE_RESUME; 3034 cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0; 3035 cgc->data_direction = CGC_DATA_NONE; 3036 return cdo->generic_packet(cdi, cgc); 3037} 3038 3039static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi, 3040 void __user *arg, 3041 struct packet_command *cgc) 3042{ 3043 int ret; 3044 dvd_struct *s; 3045 int size = sizeof(dvd_struct); 3046 3047 if (!CDROM_CAN(CDC_DVD)) 3048 return -ENOSYS; 3049 3050 s = kmalloc(size, GFP_KERNEL); 3051 if (!s) 3052 return -ENOMEM; 3053 3054 cdinfo(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n"); 3055 if (copy_from_user(s, arg, size)) { 3056 kfree(s); 3057 return -EFAULT; 3058 } 3059 3060 ret = dvd_read_struct(cdi, s, cgc); 3061 if (ret) 3062 goto out; 3063 3064 if (copy_to_user(arg, s, size)) 3065 ret = -EFAULT; 3066out: 3067 kfree(s); 3068 return ret; 3069} 3070 3071static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi, 3072 void __user *arg) 3073{ 3074 int ret; 3075 dvd_authinfo ai; 3076 if (!CDROM_CAN(CDC_DVD)) 3077 return -ENOSYS; 3078 cdinfo(CD_DO_IOCTL, "entering DVD_AUTH\n"); 3079 IOCTL_IN(arg, dvd_authinfo, ai); 3080 ret = dvd_do_auth(cdi, &ai); 3081 if (ret) 3082 return ret; 3083 IOCTL_OUT(arg, dvd_authinfo, ai); 3084 return 0; 3085} 3086 3087static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi, 3088 void __user *arg) 3089{ 3090 int ret; 3091 long next = 0; 3092 cdinfo(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n"); 3093 ret = cdrom_get_next_writable(cdi, &next); 3094 if (ret) 3095 return ret; 3096 IOCTL_OUT(arg, long, next); 3097 return 0; 3098} 3099 3100static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi, 3101 void __user *arg) 3102{ 3103 int ret; 3104 long last = 0; 3105 cdinfo(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n"); 3106 ret = cdrom_get_last_written(cdi, &last); 3107 if (ret) 3108 return ret; 3109 IOCTL_OUT(arg, long, last); 3110 return 0; 3111} 3112 3113static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 3114 unsigned long arg) 3115{ 3116 struct packet_command cgc; 3117 void __user *userptr = (void __user *)arg; 3118 3119 memset(&cgc, 0, sizeof(cgc)); 3120 3121 /* build a unified command and queue it through 3122 cdo->generic_packet() */ 3123 switch (cmd) { 3124 case CDROMREADRAW: 3125 case CDROMREADMODE1: 3126 case CDROMREADMODE2: 3127 return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd); 3128 case CDROMREADAUDIO: 3129 return mmc_ioctl_cdrom_read_audio(cdi, userptr); 3130 case CDROMSUBCHNL: 3131 return mmc_ioctl_cdrom_subchannel(cdi, userptr); 3132 case CDROMPLAYMSF: 3133 return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc); 3134 case CDROMPLAYBLK: 3135 return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc); 3136 case CDROMVOLCTRL: 3137 case CDROMVOLREAD: 3138 return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd); 3139 case CDROMSTART: 3140 case CDROMSTOP: 3141 return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd); 3142 case CDROMPAUSE: 3143 case CDROMRESUME: 3144 return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd); 3145 case DVD_READ_STRUCT: 3146 return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc); 3147 case DVD_AUTH: 3148 return mmc_ioctl_dvd_auth(cdi, userptr); 3149 case CDROM_NEXT_WRITABLE: 3150 return mmc_ioctl_cdrom_next_writable(cdi, userptr); 3151 case CDROM_LAST_WRITTEN: 3152 return mmc_ioctl_cdrom_last_written(cdi, userptr); 3153 } 3154 3155 return -ENOTTY; 3156} 3157 3158static int cdrom_get_track_info(struct cdrom_device_info *cdi, __u16 track, __u8 type, 3159 track_information *ti) 3160{ 3161 struct cdrom_device_ops *cdo = cdi->ops; 3162 struct packet_command cgc; 3163 int ret, buflen; 3164 3165 init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ); 3166 cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO; 3167 cgc.cmd[1] = type & 3; 3168 cgc.cmd[4] = (track & 0xff00) >> 8; 3169 cgc.cmd[5] = track & 0xff; 3170 cgc.cmd[8] = 8; 3171 cgc.quiet = 1; 3172 3173 if ((ret = cdo->generic_packet(cdi, &cgc))) 3174 return ret; 3175 3176 buflen = be16_to_cpu(ti->track_information_length) + 3177 sizeof(ti->track_information_length); 3178 3179 if (buflen > sizeof(track_information)) 3180 buflen = sizeof(track_information); 3181 3182 cgc.cmd[8] = cgc.buflen = buflen; 3183 if ((ret = cdo->generic_packet(cdi, &cgc))) 3184 return ret; 3185 3186 /* return actual fill size */ 3187 return buflen; 3188} 3189 3190/* requires CD R/RW */ 3191static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di) 3192{ 3193 struct cdrom_device_ops *cdo = cdi->ops; 3194 struct packet_command cgc; 3195 int ret, buflen; 3196 3197 /* set up command and get the disc info */ 3198 init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ); 3199 cgc.cmd[0] = GPCMD_READ_DISC_INFO; 3200 cgc.cmd[8] = cgc.buflen = 2; 3201 cgc.quiet = 1; 3202 3203 if ((ret = cdo->generic_packet(cdi, &cgc))) 3204 return ret; 3205 3206 /* not all drives have the same disc_info length, so requeue 3207 * packet with the length the drive tells us it can supply 3208 */ 3209 buflen = be16_to_cpu(di->disc_information_length) + 3210 sizeof(di->disc_information_length); 3211 3212 if (buflen > sizeof(disc_information)) 3213 buflen = sizeof(disc_information); 3214 3215 cgc.cmd[8] = cgc.buflen = buflen; 3216 if ((ret = cdo->generic_packet(cdi, &cgc))) 3217 return ret; 3218 3219 /* return actual fill size */ 3220 return buflen; 3221} 3222 3223/* return the last written block on the CD-R media. this is for the udf 3224 file system. */ 3225int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written) 3226{ 3227 struct cdrom_tocentry toc; 3228 disc_information di; 3229 track_information ti; 3230 __u32 last_track; 3231 int ret = -1, ti_size; 3232 3233 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3234 goto use_toc; 3235 3236 ret = cdrom_get_disc_info(cdi, &di); 3237 if (ret < (int)(offsetof(typeof(di), last_track_lsb) 3238 + sizeof(di.last_track_lsb))) 3239 goto use_toc; 3240 3241 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3242 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3243 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3244 if (ti_size < (int)offsetof(typeof(ti), track_start)) 3245 goto use_toc; 3246 3247 /* if this track is blank, try the previous. */ 3248 if (ti.blank) { 3249 if (last_track==1) 3250 goto use_toc; 3251 last_track--; 3252 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3253 } 3254 3255 if (ti_size < (int)(offsetof(typeof(ti), track_size) 3256 + sizeof(ti.track_size))) 3257 goto use_toc; 3258 3259 /* if last recorded field is valid, return it. */ 3260 if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address) 3261 + sizeof(ti.last_rec_address))) { 3262 *last_written = be32_to_cpu(ti.last_rec_address); 3263 } else { 3264 /* make it up instead */ 3265 *last_written = be32_to_cpu(ti.track_start) + 3266 be32_to_cpu(ti.track_size); 3267 if (ti.free_blocks) 3268 *last_written -= (be32_to_cpu(ti.free_blocks) + 7); 3269 } 3270 return 0; 3271 3272 /* this is where we end up if the drive either can't do a 3273 GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if 3274 it doesn't give enough information or fails. then we return 3275 the toc contents. */ 3276use_toc: 3277 toc.cdte_format = CDROM_MSF; 3278 toc.cdte_track = CDROM_LEADOUT; 3279 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc))) 3280 return ret; 3281 sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA); 3282 *last_written = toc.cdte_addr.lba; 3283 return 0; 3284} 3285 3286/* return the next writable block. also for udf file system. */ 3287static int cdrom_get_next_writable(struct cdrom_device_info *cdi, long *next_writable) 3288{ 3289 disc_information di; 3290 track_information ti; 3291 __u16 last_track; 3292 int ret, ti_size; 3293 3294 if (!CDROM_CAN(CDC_GENERIC_PACKET)) 3295 goto use_last_written; 3296 3297 ret = cdrom_get_disc_info(cdi, &di); 3298 if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb) 3299 + sizeof(di.last_track_lsb)) 3300 goto use_last_written; 3301 3302 /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */ 3303 last_track = (di.last_track_msb << 8) | di.last_track_lsb; 3304 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3305 if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start)) 3306 goto use_last_written; 3307 3308 /* if this track is blank, try the previous. */ 3309 if (ti.blank) { 3310 if (last_track == 1) 3311 goto use_last_written; 3312 last_track--; 3313 ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti); 3314 if (ti_size < 0) 3315 goto use_last_written; 3316 } 3317 3318 /* if next recordable address field is valid, use it. */ 3319 if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable) 3320 + sizeof(ti.next_writable)) { 3321 *next_writable = be32_to_cpu(ti.next_writable); 3322 return 0; 3323 } 3324 3325use_last_written: 3326 if ((ret = cdrom_get_last_written(cdi, next_writable))) { 3327 *next_writable = 0; 3328 return ret; 3329 } else { 3330 *next_writable += 7; 3331 return 0; 3332 } 3333} 3334 3335EXPORT_SYMBOL(cdrom_get_last_written); 3336EXPORT_SYMBOL(register_cdrom); 3337EXPORT_SYMBOL(unregister_cdrom); 3338EXPORT_SYMBOL(cdrom_open); 3339EXPORT_SYMBOL(cdrom_release); 3340EXPORT_SYMBOL(cdrom_ioctl); 3341EXPORT_SYMBOL(cdrom_media_changed); 3342EXPORT_SYMBOL(cdrom_number_of_slots); 3343EXPORT_SYMBOL(cdrom_mode_select); 3344EXPORT_SYMBOL(cdrom_mode_sense); 3345EXPORT_SYMBOL(init_cdrom_command); 3346EXPORT_SYMBOL(cdrom_get_media_event); 3347 3348#ifdef CONFIG_SYSCTL 3349 3350#define CDROM_STR_SIZE 1000 3351 3352static struct cdrom_sysctl_settings { 3353 char info[CDROM_STR_SIZE]; /* general info */ 3354 int autoclose; /* close tray upon mount, etc */ 3355 int autoeject; /* eject on umount */ 3356 int debug; /* turn on debugging messages */ 3357 int lock; /* lock the door on device open */ 3358 int check; /* check media type */ 3359} cdrom_sysctl_settings; 3360 3361enum cdrom_print_option { 3362 CTL_NAME, 3363 CTL_SPEED, 3364 CTL_SLOTS, 3365 CTL_CAPABILITY 3366}; 3367 3368static int cdrom_print_info(const char *header, int val, char *info, 3369 int *pos, enum cdrom_print_option option) 3370{ 3371 const int max_size = sizeof(cdrom_sysctl_settings.info); 3372 struct cdrom_device_info *cdi; 3373 int ret; 3374 3375 ret = scnprintf(info + *pos, max_size - *pos, header); 3376 if (!ret) 3377 return 1; 3378 3379 *pos += ret; 3380 3381 list_for_each_entry(cdi, &cdrom_list, list) { 3382 switch (option) { 3383 case CTL_NAME: 3384 ret = scnprintf(info + *pos, max_size - *pos, 3385 "\t%s", cdi->name); 3386 break; 3387 case CTL_SPEED: 3388 ret = scnprintf(info + *pos, max_size - *pos, 3389 "\t%d", cdi->speed); 3390 break; 3391 case CTL_SLOTS: 3392 ret = scnprintf(info + *pos, max_size - *pos, 3393 "\t%d", cdi->capacity); 3394 break; 3395 case CTL_CAPABILITY: 3396 ret = scnprintf(info + *pos, max_size - *pos, 3397 "\t%d", CDROM_CAN(val) != 0); 3398 break; 3399 default: 3400 pr_info("invalid option%d\n", option); 3401 return 1; 3402 } 3403 if (!ret) 3404 return 1; 3405 *pos += ret; 3406 } 3407 3408 return 0; 3409} 3410 3411static int cdrom_sysctl_info(ctl_table *ctl, int write, 3412 void __user *buffer, size_t *lenp, loff_t *ppos) 3413{ 3414 int pos; 3415 char *info = cdrom_sysctl_settings.info; 3416 const int max_size = sizeof(cdrom_sysctl_settings.info); 3417 3418 if (!*lenp || (*ppos && !write)) { 3419 *lenp = 0; 3420 return 0; 3421 } 3422 3423 mutex_lock(&cdrom_mutex); 3424 3425 pos = sprintf(info, "CD-ROM information, " VERSION "\n"); 3426 3427 if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME)) 3428 goto done; 3429 if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED)) 3430 goto done; 3431 if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS)) 3432 goto done; 3433 if (cdrom_print_info("\nCan close tray:\t", 3434 CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY)) 3435 goto done; 3436 if (cdrom_print_info("\nCan open tray:\t", 3437 CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY)) 3438 goto done; 3439 if (cdrom_print_info("\nCan lock tray:\t", 3440 CDC_LOCK, info, &pos, CTL_CAPABILITY)) 3441 goto done; 3442 if (cdrom_print_info("\nCan change speed:", 3443 CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY)) 3444 goto done; 3445 if (cdrom_print_info("\nCan select disk:", 3446 CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY)) 3447 goto done; 3448 if (cdrom_print_info("\nCan read multisession:", 3449 CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY)) 3450 goto done; 3451 if (cdrom_print_info("\nCan read MCN:\t", 3452 CDC_MCN, info, &pos, CTL_CAPABILITY)) 3453 goto done; 3454 if (cdrom_print_info("\nReports media changed:", 3455 CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY)) 3456 goto done; 3457 if (cdrom_print_info("\nCan play audio:\t", 3458 CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY)) 3459 goto done; 3460 if (cdrom_print_info("\nCan write CD-R:\t", 3461 CDC_CD_R, info, &pos, CTL_CAPABILITY)) 3462 goto done; 3463 if (cdrom_print_info("\nCan write CD-RW:", 3464 CDC_CD_RW, info, &pos, CTL_CAPABILITY)) 3465 goto done; 3466 if (cdrom_print_info("\nCan read DVD:\t", 3467 CDC_DVD, info, &pos, CTL_CAPABILITY)) 3468 goto done; 3469 if (cdrom_print_info("\nCan write DVD-R:", 3470 CDC_DVD_R, info, &pos, CTL_CAPABILITY)) 3471 goto done; 3472 if (cdrom_print_info("\nCan write DVD-RAM:", 3473 CDC_DVD_RAM, info, &pos, CTL_CAPABILITY)) 3474 goto done; 3475 if (cdrom_print_info("\nCan read MRW:\t", 3476 CDC_MRW, info, &pos, CTL_CAPABILITY)) 3477 goto done; 3478 if (cdrom_print_info("\nCan write MRW:\t", 3479 CDC_MRW_W, info, &pos, CTL_CAPABILITY)) 3480 goto done; 3481 if (cdrom_print_info("\nCan write RAM:\t", 3482 CDC_RAM, info, &pos, CTL_CAPABILITY)) 3483 goto done; 3484 if (!scnprintf(info + pos, max_size - pos, "\n\n")) 3485 goto done; 3486doit: 3487 mutex_unlock(&cdrom_mutex); 3488 return proc_dostring(ctl, write, buffer, lenp, ppos); 3489done: 3490 pr_info("info buffer too small\n"); 3491 goto doit; 3492} 3493 3494/* Unfortunately, per device settings are not implemented through 3495 procfs/sysctl yet. When they are, this will naturally disappear. For now 3496 just update all drives. Later this will become the template on which 3497 new registered drives will be based. */ 3498static void cdrom_update_settings(void) 3499{ 3500 struct cdrom_device_info *cdi; 3501 3502 mutex_lock(&cdrom_mutex); 3503 list_for_each_entry(cdi, &cdrom_list, list) { 3504 if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY)) 3505 cdi->options |= CDO_AUTO_CLOSE; 3506 else if (!autoclose) 3507 cdi->options &= ~CDO_AUTO_CLOSE; 3508 if (autoeject && CDROM_CAN(CDC_OPEN_TRAY)) 3509 cdi->options |= CDO_AUTO_EJECT; 3510 else if (!autoeject) 3511 cdi->options &= ~CDO_AUTO_EJECT; 3512 if (lockdoor && CDROM_CAN(CDC_LOCK)) 3513 cdi->options |= CDO_LOCK; 3514 else if (!lockdoor) 3515 cdi->options &= ~CDO_LOCK; 3516 if (check_media_type) 3517 cdi->options |= CDO_CHECK_TYPE; 3518 else 3519 cdi->options &= ~CDO_CHECK_TYPE; 3520 } 3521 mutex_unlock(&cdrom_mutex); 3522} 3523 3524static int cdrom_sysctl_handler(ctl_table *ctl, int write, 3525 void __user *buffer, size_t *lenp, loff_t *ppos) 3526{ 3527 int ret; 3528 3529 ret = proc_dointvec(ctl, write, buffer, lenp, ppos); 3530 3531 if (write) { 3532 3533 /* we only care for 1 or 0. */ 3534 autoclose = !!cdrom_sysctl_settings.autoclose; 3535 autoeject = !!cdrom_sysctl_settings.autoeject; 3536 debug = !!cdrom_sysctl_settings.debug; 3537 lockdoor = !!cdrom_sysctl_settings.lock; 3538 check_media_type = !!cdrom_sysctl_settings.check; 3539 3540 /* update the option flags according to the changes. we 3541 don't have per device options through sysctl yet, 3542 but we will have and then this will disappear. */ 3543 cdrom_update_settings(); 3544 } 3545 3546 return ret; 3547} 3548 3549/* Place files in /proc/sys/dev/cdrom */ 3550static ctl_table cdrom_table[] = { 3551 { 3552 .procname = "info", 3553 .data = &cdrom_sysctl_settings.info, 3554 .maxlen = CDROM_STR_SIZE, 3555 .mode = 0444, 3556 .proc_handler = cdrom_sysctl_info, 3557 }, 3558 { 3559 .procname = "autoclose", 3560 .data = &cdrom_sysctl_settings.autoclose, 3561 .maxlen = sizeof(int), 3562 .mode = 0644, 3563 .proc_handler = cdrom_sysctl_handler, 3564 }, 3565 { 3566 .procname = "autoeject", 3567 .data = &cdrom_sysctl_settings.autoeject, 3568 .maxlen = sizeof(int), 3569 .mode = 0644, 3570 .proc_handler = cdrom_sysctl_handler, 3571 }, 3572 { 3573 .procname = "debug", 3574 .data = &cdrom_sysctl_settings.debug, 3575 .maxlen = sizeof(int), 3576 .mode = 0644, 3577 .proc_handler = cdrom_sysctl_handler, 3578 }, 3579 { 3580 .procname = "lock", 3581 .data = &cdrom_sysctl_settings.lock, 3582 .maxlen = sizeof(int), 3583 .mode = 0644, 3584 .proc_handler = cdrom_sysctl_handler, 3585 }, 3586 { 3587 .procname = "check_media", 3588 .data = &cdrom_sysctl_settings.check, 3589 .maxlen = sizeof(int), 3590 .mode = 0644, 3591 .proc_handler = cdrom_sysctl_handler 3592 }, 3593 { } 3594}; 3595 3596static ctl_table cdrom_cdrom_table[] = { 3597 { 3598 .procname = "cdrom", 3599 .maxlen = 0, 3600 .mode = 0555, 3601 .child = cdrom_table, 3602 }, 3603 { } 3604}; 3605 3606/* Make sure that /proc/sys/dev is there */ 3607static ctl_table cdrom_root_table[] = { 3608 { 3609 .procname = "dev", 3610 .maxlen = 0, 3611 .mode = 0555, 3612 .child = cdrom_cdrom_table, 3613 }, 3614 { } 3615}; 3616static struct ctl_table_header *cdrom_sysctl_header; 3617 3618static void cdrom_sysctl_register(void) 3619{ 3620 static int initialized; 3621 3622 if (initialized == 1) 3623 return; 3624 3625 cdrom_sysctl_header = register_sysctl_table(cdrom_root_table); 3626 3627 /* set the defaults */ 3628 cdrom_sysctl_settings.autoclose = autoclose; 3629 cdrom_sysctl_settings.autoeject = autoeject; 3630 cdrom_sysctl_settings.debug = debug; 3631 cdrom_sysctl_settings.lock = lockdoor; 3632 cdrom_sysctl_settings.check = check_media_type; 3633 3634 initialized = 1; 3635} 3636 3637static void cdrom_sysctl_unregister(void) 3638{ 3639 if (cdrom_sysctl_header) 3640 unregister_sysctl_table(cdrom_sysctl_header); 3641} 3642 3643#else /* CONFIG_SYSCTL */ 3644 3645static void cdrom_sysctl_register(void) 3646{ 3647} 3648 3649static void cdrom_sysctl_unregister(void) 3650{ 3651} 3652 3653#endif /* CONFIG_SYSCTL */ 3654 3655static int __init cdrom_init(void) 3656{ 3657 cdrom_sysctl_register(); 3658 3659 return 0; 3660} 3661 3662static void __exit cdrom_exit(void) 3663{ 3664 pr_info("Uniform CD-ROM driver unloaded\n"); 3665 cdrom_sysctl_unregister(); 3666} 3667 3668module_init(cdrom_init); 3669module_exit(cdrom_exit); 3670MODULE_LICENSE("GPL"); 3671