/drivers/cdrom/cdrom.c
C | 3397 lines | 2375 code | 467 blank | 555 comment | 502 complexity | 6987ca460554be23112dfc0c58ed2b11 MD5 | raw file
Large files files are truncated, but you can click here to view the full file
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 REVISION "Revision: 3.20" 246#define VERSION "Id: cdrom.c 3.20 2003/12/17" 247 248/* I use an error-log mask to give fine grain control over the type of 249 messages dumped to the system logs. The available masks include: */ 250#define CD_NOTHING 0x0 251#define CD_WARNING 0x1 252#define CD_REG_UNREG 0x2 253#define CD_DO_IOCTL 0x4 254#define CD_OPEN 0x8 255#define CD_CLOSE 0x10 256#define CD_COUNT_TRACKS 0x20 257#define CD_CHANGER 0x40 258#define CD_DVD 0x80 259 260/* Define this to remove _all_ the debugging messages */ 261/* #define ERRLOGMASK CD_NOTHING */ 262#define ERRLOGMASK CD_WARNING 263/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */ 264/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */ 265 266#include <linux/config.h> 267#include <linux/module.h> 268#include <linux/fs.h> 269#include <linux/buffer_head.h> 270#include <linux/major.h> 271#include <linux/types.h> 272#include <linux/errno.h> 273#include <linux/kernel.h> 274#include <linux/mm.h> 275#include <linux/slab.h> 276#include <linux/cdrom.h> 277#include <linux/sysctl.h> 278#include <linux/proc_fs.h> 279#include <linux/blkpg.h> 280#include <linux/init.h> 281#include <linux/fcntl.h> 282#include <linux/blkdev.h> 283#include <linux/times.h> 284 285#include <asm/uaccess.h> 286 287/* used to tell the module to turn on full debugging messages */ 288static int debug; 289/* used to keep tray locked at all times */ 290static int keeplocked; 291/* default compatibility mode */ 292static int autoclose=1; 293static int autoeject; 294static int lockdoor = 1; 295/* will we ever get to use this... sigh. */ 296static int check_media_type; 297/* automatically restart mrw format */ 298static int mrw_format_restart = 1; 299module_param(debug, bool, 0); 300module_param(autoclose, bool, 0); 301module_param(autoeject, bool, 0); 302module_param(lockdoor, bool, 0); 303module_param(check_media_type, bool, 0); 304module_param(mrw_format_restart, bool, 0); 305 306static DEFINE_SPINLOCK(cdrom_lock); 307 308static const char *mrw_format_status[] = { 309 "not mrw", 310 "bgformat inactive", 311 "bgformat active", 312 "mrw complete", 313}; 314 315static const char *mrw_address_space[] = { "DMA", "GAA" }; 316 317#if (ERRLOGMASK!=CD_NOTHING) 318#define cdinfo(type, fmt, args...) \ 319 if ((ERRLOGMASK & type) || debug==1 ) \ 320 printk(KERN_INFO "cdrom: " fmt, ## args) 321#else 322#define cdinfo(type, fmt, args...) 323#endif 324 325/* These are used to simplify getting data in from and back to user land */ 326#define IOCTL_IN(arg, type, in) \ 327 if (copy_from_user(&(in), (type __user *) (arg), sizeof (in))) \ 328 return -EFAULT; 329 330#define IOCTL_OUT(arg, type, out) \ 331 if (copy_to_user((type __user *) (arg), &(out), sizeof (out))) \ 332 return -EFAULT; 333 334/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in 335 a lot of places. This macro makes the code more clear. */ 336#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type)) 337 338/* used in the audio ioctls */ 339#define CHECKAUDIO if ((ret=check_for_audio_disc(cdi, cdo))) return ret 340 341/* Not-exported routines. */ 342static int open_for_data(struct cdrom_device_info * cdi); 343static int check_for_audio_disc(struct cdrom_device_info * cdi, 344 struct cdrom_device_ops * cdo); 345static void sanitize_format(union cdrom_addr *addr, 346 u_char * curr, u_char requested); 347static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd, 348 unsigned long arg); 349 350int cdrom_get_last_written(struct cdrom_device_info *, long *); 351static int cdrom_get_next_writable(struct cdrom_device_info *, long *); 352static void cdrom_count_tracks(struct cdrom_device_info *, tracktype*); 353 354static int cdrom_mrw_exit(struct cdrom_device_info *cdi); 355 356static int cdrom_get_disc_info(struct cdrom_device_info *cdi, disc_information *di); 357 358#ifdef CONFIG_SYSCTL 359static void cdrom_sysctl_register(void); 360#endif /* CONFIG_SYSCTL */ 361static struct cdrom_device_info *topCdromPtr; 362 363static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 364 struct packet_command *cgc) 365{ 366 if (cgc->sense) { 367 cgc->sense->sense_key = 0x05; 368 cgc->sense->asc = 0x20; 369 cgc->sense->ascq = 0x00; 370 } 371 372 cgc->stat = -EIO; 373 return -EIO; 374} 375 376/* This macro makes sure we don't have to check on cdrom_device_ops 377 * existence in the run-time routines below. Change_capability is a 378 * hack to have the capability flags defined const, while we can still 379 * change it here without gcc complaining at every line. 380 */ 381#define ENSURE(call, bits) if (cdo->call == NULL) *change_capability &= ~(bits) 382 383int register_cdrom(struct cdrom_device_info *cdi) 384{ 385 static char banner_printed; 386 struct cdrom_device_ops *cdo = cdi->ops; 387 int *change_capability = (int *)&cdo->capability; /* hack */ 388 389 cdinfo(CD_OPEN, "entering register_cdrom\n"); 390 391 if (cdo->open == NULL || cdo->release == NULL) 392 return -2; 393 if (!banner_printed) { 394 printk(KERN_INFO "Uniform CD-ROM driver " REVISION "\n"); 395 banner_printed = 1; 396#ifdef CONFIG_SYSCTL 397 cdrom_sysctl_register(); 398#endif /* CONFIG_SYSCTL */ 399 } 400 401 ENSURE(drive_status, CDC_DRIVE_STATUS ); 402 ENSURE(media_changed, CDC_MEDIA_CHANGED); 403 ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY); 404 ENSURE(lock_door, CDC_LOCK); 405 ENSURE(select_speed, CDC_SELECT_SPEED); 406 ENSURE(get_last_session, CDC_MULTI_SESSION); 407 ENSURE(get_mcn, CDC_MCN); 408 ENSURE(reset, CDC_RESET); 409 ENSURE(audio_ioctl, CDC_PLAY_AUDIO); 410 ENSURE(dev_ioctl, CDC_IOCTLS); 411 ENSURE(generic_packet, CDC_GENERIC_PACKET); 412 cdi->mc_flags = 0; 413 cdo->n_minors = 0; 414 cdi->options = CDO_USE_FFLAGS; 415 416 if (autoclose==1 && CDROM_CAN(CDC_CLOSE_TRAY)) 417 cdi->options |= (int) CDO_AUTO_CLOSE; 418 if (autoeject==1 && CDROM_CAN(CDC_OPEN_TRAY)) 419 cdi->options |= (int) CDO_AUTO_EJECT; 420 if (lockdoor==1) 421 cdi->options |= (int) CDO_LOCK; 422 if (check_media_type==1) 423 cdi->options |= (int) CDO_CHECK_TYPE; 424 425 if (CDROM_CAN(CDC_MRW_W)) 426 cdi->exit = cdrom_mrw_exit; 427 428 if (cdi->disk) 429 cdi->cdda_method = CDDA_BPC_FULL; 430 else 431 cdi->cdda_method = CDDA_OLD; 432 433 if (!cdo->generic_packet) 434 cdo->generic_packet = cdrom_dummy_generic_packet; 435 436 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name); 437 spin_lock(&cdrom_lock); 438 cdi->next = topCdromPtr; 439 topCdromPtr = cdi; 440 spin_unlock(&cdrom_lock); 441 return 0; 442} 443#undef ENSURE 444 445int unregister_cdrom(struct cdrom_device_info *unreg) 446{ 447 struct cdrom_device_info *cdi, *prev; 448 cdinfo(CD_OPEN, "entering unregister_cdrom\n"); 449 450 prev = NULL; 451 spin_lock(&cdrom_lock); 452 cdi = topCdromPtr; 453 while (cdi && cdi != unreg) { 454 prev = cdi; 455 cdi = cdi->next; 456 } 457 458 if (cdi == NULL) { 459 spin_unlock(&cdrom_lock); 460 return -2; 461 } 462 if (prev) 463 prev->next = cdi->next; 464 else 465 topCdromPtr = cdi->next; 466 467 spin_unlock(&cdrom_lock); 468 469 if (cdi->exit) 470 cdi->exit(cdi); 471 472 cdi->ops->n_minors--; 473 cdinfo(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name); 474 return 0; 475} 476 477int cdrom_get_media_event(struct cdrom_device_info *cdi, 478 struct media_event_desc *med) 479{ 480 struct packet_command cgc; 481 unsigned char buffer[8]; 482 struct event_header *eh = (struct event_header *) buffer; 483 484 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 485 cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION; 486 cgc.cmd[1] = 1; /* IMMED */ 487 cgc.cmd[4] = 1 << 4; /* media event */ 488 cgc.cmd[8] = sizeof(buffer); 489 cgc.quiet = 1; 490 491 if (cdi->ops->generic_packet(cdi, &cgc)) 492 return 1; 493 494 if (be16_to_cpu(eh->data_len) < sizeof(*med)) 495 return 1; 496 497 if (eh->nea || eh->notification_class != 0x4) 498 return 1; 499 500 memcpy(med, &buffer[sizeof(*eh)], sizeof(*med)); 501 return 0; 502} 503 504/* 505 * the first prototypes used 0x2c as the page code for the mrw mode page, 506 * subsequently this was changed to 0x03. probe the one used by this drive 507 */ 508static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi) 509{ 510 struct packet_command cgc; 511 char buffer[16]; 512 513 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 514 515 cgc.timeout = HZ; 516 cgc.quiet = 1; 517 518 if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) { 519 cdi->mrw_mode_page = MRW_MODE_PC; 520 return 0; 521 } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) { 522 cdi->mrw_mode_page = MRW_MODE_PC_PRE1; 523 return 0; 524 } 525 526 return 1; 527} 528 529static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write) 530{ 531 struct packet_command cgc; 532 struct mrw_feature_desc *mfd; 533 unsigned char buffer[16]; 534 int ret; 535 536 *write = 0; 537 538 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 539 540 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 541 cgc.cmd[3] = CDF_MRW; 542 cgc.cmd[8] = sizeof(buffer); 543 cgc.quiet = 1; 544 545 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 546 return ret; 547 548 mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)]; 549 if (be16_to_cpu(mfd->feature_code) != CDF_MRW) 550 return 1; 551 *write = mfd->write; 552 553 if ((ret = cdrom_mrw_probe_pc(cdi))) { 554 *write = 0; 555 return ret; 556 } 557 558 return 0; 559} 560 561static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont) 562{ 563 struct packet_command cgc; 564 unsigned char buffer[12]; 565 int ret; 566 567 printk(KERN_INFO "cdrom: %sstarting format\n", cont ? "Re" : ""); 568 569 /* 570 * FmtData bit set (bit 4), format type is 1 571 */ 572 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE); 573 cgc.cmd[0] = GPCMD_FORMAT_UNIT; 574 cgc.cmd[1] = (1 << 4) | 1; 575 576 cgc.timeout = 5 * 60 * HZ; 577 578 /* 579 * 4 byte format list header, 8 byte format list descriptor 580 */ 581 buffer[1] = 1 << 1; 582 buffer[3] = 8; 583 584 /* 585 * nr_blocks field 586 */ 587 buffer[4] = 0xff; 588 buffer[5] = 0xff; 589 buffer[6] = 0xff; 590 buffer[7] = 0xff; 591 592 buffer[8] = 0x24 << 2; 593 buffer[11] = cont; 594 595 ret = cdi->ops->generic_packet(cdi, &cgc); 596 if (ret) 597 printk(KERN_INFO "cdrom: bgformat failed\n"); 598 599 return ret; 600} 601 602static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed) 603{ 604 struct packet_command cgc; 605 606 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 607 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 608 609 /* 610 * Session = 1, Track = 0 611 */ 612 cgc.cmd[1] = !!immed; 613 cgc.cmd[2] = 1 << 1; 614 615 cgc.timeout = 5 * 60 * HZ; 616 617 return cdi->ops->generic_packet(cdi, &cgc); 618} 619 620static int cdrom_flush_cache(struct cdrom_device_info *cdi) 621{ 622 struct packet_command cgc; 623 624 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 625 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 626 627 cgc.timeout = 5 * 60 * HZ; 628 629 return cdi->ops->generic_packet(cdi, &cgc); 630} 631 632static int cdrom_mrw_exit(struct cdrom_device_info *cdi) 633{ 634 disc_information di; 635 int ret; 636 637 ret = cdrom_get_disc_info(cdi, &di); 638 if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type)) 639 return 1; 640 641 ret = 0; 642 if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) { 643 printk(KERN_INFO "cdrom: issuing MRW back ground " 644 "format suspend\n"); 645 ret = cdrom_mrw_bgformat_susp(cdi, 0); 646 } 647 648 if (!ret) 649 ret = cdrom_flush_cache(cdi); 650 651 return ret; 652} 653 654static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space) 655{ 656 struct packet_command cgc; 657 struct mode_page_header *mph; 658 char buffer[16]; 659 int ret, offset, size; 660 661 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 662 663 cgc.buffer = buffer; 664 cgc.buflen = sizeof(buffer); 665 666 if ((ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0))) 667 return ret; 668 669 mph = (struct mode_page_header *) buffer; 670 offset = be16_to_cpu(mph->desc_length); 671 size = be16_to_cpu(mph->mode_data_length) + 2; 672 673 buffer[offset + 3] = space; 674 cgc.buflen = size; 675 676 if ((ret = cdrom_mode_select(cdi, &cgc))) 677 return ret; 678 679 printk(KERN_INFO "cdrom: %s: mrw address space %s selected\n", cdi->name, mrw_address_space[space]); 680 return 0; 681} 682 683static int cdrom_get_random_writable(struct cdrom_device_info *cdi, 684 struct rwrt_feature_desc *rfd) 685{ 686 struct packet_command cgc; 687 char buffer[24]; 688 int ret; 689 690 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 691 692 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */ 693 cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */ 694 cgc.cmd[8] = sizeof(buffer); /* often 0x18 */ 695 cgc.quiet = 1; 696 697 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 698 return ret; 699 700 memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd)); 701 return 0; 702} 703 704static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi) 705{ 706 struct packet_command cgc; 707 char buffer[16]; 708 __u16 *feature_code; 709 int ret; 710 711 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 712 713 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 714 cgc.cmd[3] = CDF_HWDM; 715 cgc.cmd[8] = sizeof(buffer); 716 cgc.quiet = 1; 717 718 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 719 return ret; 720 721 feature_code = (__u16 *) &buffer[sizeof(struct feature_header)]; 722 if (be16_to_cpu(*feature_code) == CDF_HWDM) 723 return 0; 724 725 return 1; 726} 727 728 729static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write) 730{ 731 struct rwrt_feature_desc rfd; 732 int ret; 733 734 *write = 0; 735 736 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 737 return ret; 738 739 if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 740 *write = 1; 741 742 return 0; 743} 744 745static int cdrom_media_erasable(struct cdrom_device_info *cdi) 746{ 747 disc_information di; 748 int ret; 749 750 ret = cdrom_get_disc_info(cdi, &di); 751 if (ret < 0 || ret < offsetof(typeof(di), n_first_track)) 752 return -1; 753 754 return di.erasable; 755} 756 757/* 758 * FIXME: check RO bit 759 */ 760static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi) 761{ 762 int ret = cdrom_media_erasable(cdi); 763 764 /* 765 * allow writable open if media info read worked and media is 766 * erasable, _or_ if it fails since not all drives support it 767 */ 768 if (!ret) 769 return 1; 770 771 return 0; 772} 773 774static int cdrom_mrw_open_write(struct cdrom_device_info *cdi) 775{ 776 disc_information di; 777 int ret; 778 779 /* 780 * always reset to DMA lba space on open 781 */ 782 if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) { 783 printk(KERN_ERR "cdrom: failed setting lba address space\n"); 784 return 1; 785 } 786 787 ret = cdrom_get_disc_info(cdi, &di); 788 if (ret < 0 || ret < offsetof(typeof(di),disc_type)) 789 return 1; 790 791 if (!di.erasable) 792 return 1; 793 794 /* 795 * mrw_status 796 * 0 - not MRW formatted 797 * 1 - MRW bgformat started, but not running or complete 798 * 2 - MRW bgformat in progress 799 * 3 - MRW formatting complete 800 */ 801 ret = 0; 802 printk(KERN_INFO "cdrom open: mrw_status '%s'\n", 803 mrw_format_status[di.mrw_status]); 804 if (!di.mrw_status) 805 ret = 1; 806 else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE && 807 mrw_format_restart) 808 ret = cdrom_mrw_bgformat(cdi, 1); 809 810 return ret; 811} 812 813static int mo_open_write(struct cdrom_device_info *cdi) 814{ 815 struct packet_command cgc; 816 char buffer[255]; 817 int ret; 818 819 init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ); 820 cgc.quiet = 1; 821 822 /* 823 * obtain write protect information as per 824 * drivers/scsi/sd.c:sd_read_write_protect_flag 825 */ 826 827 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 828 if (ret) 829 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0); 830 if (ret) { 831 cgc.buflen = 255; 832 ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0); 833 } 834 835 /* drive gave us no info, let the user go ahead */ 836 if (ret) 837 return 0; 838 839 return buffer[3] & 0x80; 840} 841 842static int cdrom_ram_open_write(struct cdrom_device_info *cdi) 843{ 844 struct rwrt_feature_desc rfd; 845 int ret; 846 847 if ((ret = cdrom_has_defect_mgt(cdi))) 848 return ret; 849 850 if ((ret = cdrom_get_random_writable(cdi, &rfd))) 851 return ret; 852 else if (CDF_RWRT == be16_to_cpu(rfd.feature_code)) 853 ret = !rfd.curr; 854 855 cdinfo(CD_OPEN, "can open for random write\n"); 856 return ret; 857} 858 859static void cdrom_mmc3_profile(struct cdrom_device_info *cdi) 860{ 861 struct packet_command cgc; 862 char buffer[32]; 863 int ret, mmc3_profile; 864 865 init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); 866 867 cgc.cmd[0] = GPCMD_GET_CONFIGURATION; 868 cgc.cmd[1] = 0; 869 cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */ 870 cgc.cmd[8] = sizeof(buffer); /* Allocation Length */ 871 cgc.quiet = 1; 872 873 if ((ret = cdi->ops->generic_packet(cdi, &cgc))) 874 mmc3_profile = 0xffff; 875 else 876 mmc3_profile = (buffer[6] << 8) | buffer[7]; 877 878 cdi->mmc3_profile = mmc3_profile; 879} 880 881static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi) 882{ 883 switch (cdi->mmc3_profile) { 884 case 0x12: /* DVD-RAM */ 885 case 0x1A: /* DVD+RW */ 886 return 0; 887 default: 888 return 1; 889 } 890} 891 892/* 893 * returns 0 for ok to open write, non-0 to disallow 894 */ 895static int cdrom_open_write(struct cdrom_device_info *cdi) 896{ 897 int mrw, mrw_write, ram_write; 898 int ret = 1; 899 900 mrw = 0; 901 if (!cdrom_is_mrw(cdi, &mrw_write)) 902 mrw = 1; 903 904 if (CDROM_CAN(CDC_MO_DRIVE)) 905 ram_write = 1; 906 else 907 (void) cdrom_is_random_writable(cdi, &ram_write); 908 909 if (mrw) 910 cdi->mask &= ~CDC_MRW; 911 else 912 cdi->mask |= CDC_MRW; 913 914 if (mrw_write) 915 cdi->mask &= ~CDC_MRW_W; 916 else 917 cdi->mask |= CDC_MRW_W; 918 919 if (ram_write) 920 cdi->mask &= ~CDC_RAM; 921 else 922 cdi->mask |= CDC_RAM; 923 924 if (CDROM_CAN(CDC_MRW_W)) 925 ret = cdrom_mrw_open_write(cdi); 926 else if (CDROM_CAN(CDC_DVD_RAM)) 927 ret = cdrom_dvdram_open_write(cdi); 928 else if (CDROM_CAN(CDC_RAM) && 929 !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE)) 930 ret = cdrom_ram_open_write(cdi); 931 else if (CDROM_CAN(CDC_MO_DRIVE)) 932 ret = mo_open_write(cdi); 933 else if (!cdrom_is_dvd_rw(cdi)) 934 ret = 0; 935 936 return ret; 937} 938 939static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi) 940{ 941 struct packet_command cgc; 942 943 if (cdi->mmc3_profile != 0x1a) { 944 cdinfo(CD_CLOSE, "%s: No DVD+RW\n", cdi->name); 945 return; 946 } 947 948 if (!cdi->media_written) { 949 cdinfo(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name); 950 return; 951 } 952 953 printk(KERN_INFO "cdrom: %s: dirty DVD+RW media, \"finalizing\"\n", 954 cdi->name); 955 956 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 957 cgc.cmd[0] = GPCMD_FLUSH_CACHE; 958 cgc.timeout = 30*HZ; 959 cdi->ops->generic_packet(cdi, &cgc); 960 961 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 962 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 963 cgc.timeout = 3000*HZ; 964 cgc.quiet = 1; 965 cdi->ops->generic_packet(cdi, &cgc); 966 967 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 968 cgc.cmd[0] = GPCMD_CLOSE_TRACK; 969 cgc.cmd[2] = 2; /* Close session */ 970 cgc.quiet = 1; 971 cgc.timeout = 3000*HZ; 972 cdi->ops->generic_packet(cdi, &cgc); 973 974 cdi->media_written = 0; 975} 976 977static int cdrom_close_write(struct cdrom_device_info *cdi) 978{ 979#if 0 980 return cdrom_flush_cache(cdi); 981#else 982 return 0; 983#endif 984} 985 986/* We use the open-option O_NONBLOCK to indicate that the 987 * purpose of opening is only for subsequent ioctl() calls; no device 988 * integrity checks are performed. 989 * 990 * We hope that all cd-player programs will adopt this convention. It 991 * is in their own interest: device control becomes a lot easier 992 * this way. 993 */ 994int cdrom_open(struct cdrom_device_info *cdi, struct inode *ip, struct file *fp) 995{ 996 int ret; 997 998 cdinfo(CD_OPEN, "entering cdrom_open\n"); 999 1000 /* if this was a O_NONBLOCK open and we should honor the flags, 1001 * do a quick open without drive/disc integrity checks. */ 1002 cdi->use_count++; 1003 if ((fp->f_flags & O_NONBLOCK) && (cdi->options & CDO_USE_FFLAGS)) { 1004 ret = cdi->ops->open(cdi, 1); 1005 } else { 1006 ret = open_for_data(cdi); 1007 if (ret) 1008 goto err; 1009 cdrom_mmc3_profile(cdi); 1010 if (fp->f_mode & FMODE_WRITE) { 1011 ret = -EROFS; 1012 if (cdrom_open_write(cdi)) 1013 goto err; 1014 if (!CDROM_CAN(CDC_RAM)) 1015 goto err; 1016 ret = 0; 1017 cdi->media_written = 0; 1018 } 1019 } 1020 1021 if (ret) 1022 goto err; 1023 1024 cdinfo(CD_OPEN, "Use count for \"/dev/%s\" now %d\n", 1025 cdi->name, cdi->use_count); 1026 /* Do this on open. Don't wait for mount, because they might 1027 not be mounting, but opening with O_NONBLOCK */ 1028 check_disk_change(ip->i_bdev); 1029 return 0; 1030err: 1031 cdi->use_count--; 1032 return ret; 1033} 1034 1035static 1036int open_for_data(struct cdrom_device_info * cdi) 1037{ 1038 int ret; 1039 struct cdrom_device_ops *cdo = cdi->ops; 1040 tracktype tracks; 1041 cdinfo(CD_OPEN, "entering open_for_data\n"); 1042 /* Check if the driver can report drive status. If it can, we 1043 can do clever things. If it can't, well, we at least tried! */ 1044 if (cdo->drive_status != NULL) { 1045 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1046 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1047 if (ret == CDS_TRAY_OPEN) { 1048 cdinfo(CD_OPEN, "the tray is open...\n"); 1049 /* can/may i close it? */ 1050 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1051 cdi->options & CDO_AUTO_CLOSE) { 1052 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1053 ret=cdo->tray_move(cdi,0); 1054 if (ret) { 1055 cdinfo(CD_OPEN, "bummer. tried to close the tray but failed.\n"); 1056 /* Ignore the error from the low 1057 level driver. We don't care why it 1058 couldn't close the tray. We only care 1059 that there is no disc in the drive, 1060 since that is the _REAL_ problem here.*/ 1061 ret=-ENOMEDIUM; 1062 goto clean_up_and_return; 1063 } 1064 } else { 1065 cdinfo(CD_OPEN, "bummer. this drive can't close the tray.\n"); 1066 ret=-ENOMEDIUM; 1067 goto clean_up_and_return; 1068 } 1069 /* Ok, the door should be closed now.. Check again */ 1070 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1071 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1072 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1073 cdinfo(CD_OPEN, "tray might not contain a medium.\n"); 1074 ret=-ENOMEDIUM; 1075 goto clean_up_and_return; 1076 } 1077 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1078 } 1079 /* the door should be closed now, check for the disc */ 1080 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1081 if (ret!=CDS_DISC_OK) { 1082 ret = -ENOMEDIUM; 1083 goto clean_up_and_return; 1084 } 1085 } 1086 cdrom_count_tracks(cdi, &tracks); 1087 if (tracks.error == CDS_NO_DISC) { 1088 cdinfo(CD_OPEN, "bummer. no disc.\n"); 1089 ret=-ENOMEDIUM; 1090 goto clean_up_and_return; 1091 } 1092 /* CD-Players which don't use O_NONBLOCK, workman 1093 * for example, need bit CDO_CHECK_TYPE cleared! */ 1094 if (tracks.data==0) { 1095 if (cdi->options & CDO_CHECK_TYPE) { 1096 /* give people a warning shot, now that CDO_CHECK_TYPE 1097 is the default case! */ 1098 cdinfo(CD_OPEN, "bummer. wrong media type.\n"); 1099 cdinfo(CD_WARNING, "pid %d must open device O_NONBLOCK!\n", 1100 (unsigned int)current->pid); 1101 ret=-EMEDIUMTYPE; 1102 goto clean_up_and_return; 1103 } 1104 else { 1105 cdinfo(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set.\n"); 1106 } 1107 } 1108 1109 cdinfo(CD_OPEN, "all seems well, opening the device.\n"); 1110 1111 /* all seems well, we can open the device */ 1112 ret = cdo->open(cdi, 0); /* open for data */ 1113 cdinfo(CD_OPEN, "opening the device gave me %d.\n", ret); 1114 /* After all this careful checking, we shouldn't have problems 1115 opening the device, but we don't want the device locked if 1116 this somehow fails... */ 1117 if (ret) { 1118 cdinfo(CD_OPEN, "open device failed.\n"); 1119 goto clean_up_and_return; 1120 } 1121 if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) { 1122 cdo->lock_door(cdi, 1); 1123 cdinfo(CD_OPEN, "door locked.\n"); 1124 } 1125 cdinfo(CD_OPEN, "device opened successfully.\n"); 1126 return ret; 1127 1128 /* Something failed. Try to unlock the drive, because some drivers 1129 (notably ide-cd) lock the drive after every command. This produced 1130 a nasty bug where after mount failed, the drive would remain locked! 1131 This ensures that the drive gets unlocked after a mount fails. This 1132 is a goto to avoid bloating the driver with redundant code. */ 1133clean_up_and_return: 1134 cdinfo(CD_WARNING, "open failed.\n"); 1135 if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) { 1136 cdo->lock_door(cdi, 0); 1137 cdinfo(CD_OPEN, "door unlocked.\n"); 1138 } 1139 return ret; 1140} 1141 1142/* This code is similar to that in open_for_data. The routine is called 1143 whenever an audio play operation is requested. 1144*/ 1145int check_for_audio_disc(struct cdrom_device_info * cdi, 1146 struct cdrom_device_ops * cdo) 1147{ 1148 int ret; 1149 tracktype tracks; 1150 cdinfo(CD_OPEN, "entering check_for_audio_disc\n"); 1151 if (!(cdi->options & CDO_CHECK_TYPE)) 1152 return 0; 1153 if (cdo->drive_status != NULL) { 1154 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1155 cdinfo(CD_OPEN, "drive_status=%d\n", ret); 1156 if (ret == CDS_TRAY_OPEN) { 1157 cdinfo(CD_OPEN, "the tray is open...\n"); 1158 /* can/may i close it? */ 1159 if (CDROM_CAN(CDC_CLOSE_TRAY) && 1160 cdi->options & CDO_AUTO_CLOSE) { 1161 cdinfo(CD_OPEN, "trying to close the tray.\n"); 1162 ret=cdo->tray_move(cdi,0); 1163 if (ret) { 1164 cdinfo(CD_OPEN, "bummer. tried to close tray but failed.\n"); 1165 /* Ignore the error from the low 1166 level driver. We don't care why it 1167 couldn't close the tray. We only care 1168 that there is no disc in the drive, 1169 since that is the _REAL_ problem here.*/ 1170 return -ENOMEDIUM; 1171 } 1172 } else { 1173 cdinfo(CD_OPEN, "bummer. this driver can't close the tray.\n"); 1174 return -ENOMEDIUM; 1175 } 1176 /* Ok, the door should be closed now.. Check again */ 1177 ret = cdo->drive_status(cdi, CDSL_CURRENT); 1178 if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) { 1179 cdinfo(CD_OPEN, "bummer. the tray is still not closed.\n"); 1180 return -ENOMEDIUM; 1181 } 1182 if (ret!=CDS_DISC_OK) { 1183 cdinfo(CD_OPEN, "bummer. disc isn't ready.\n"); 1184 return -EIO; 1185 } 1186 cdinfo(CD_OPEN, "the tray is now closed.\n"); 1187 } 1188 } 1189 cdrom_count_tracks(cdi, &tracks); 1190 if (tracks.error) 1191 return(tracks.error); 1192 1193 if (tracks.audio==0) 1194 return -EMEDIUMTYPE; 1195 1196 return 0; 1197} 1198 1199/* Admittedly, the logic below could be performed in a nicer way. */ 1200int cdrom_release(struct cdrom_device_info *cdi, struct file *fp) 1201{ 1202 struct cdrom_device_ops *cdo = cdi->ops; 1203 int opened_for_data; 1204 1205 cdinfo(CD_CLOSE, "entering cdrom_release\n"); 1206 1207 if (cdi->use_count > 0) 1208 cdi->use_count--; 1209 if (cdi->use_count == 0) 1210 cdinfo(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n", cdi->name); 1211 if (cdi->use_count == 0) 1212 cdrom_dvd_rw_close_write(cdi); 1213 if (cdi->use_count == 0 && 1214 (cdo->capability & CDC_LOCK) && !keeplocked) { 1215 cdinfo(CD_CLOSE, "Unlocking door!\n"); 1216 cdo->lock_door(cdi, 0); 1217 } 1218 opened_for_data = !(cdi->options & CDO_USE_FFLAGS) || 1219 !(fp && fp->f_flags & O_NONBLOCK); 1220 1221 /* 1222 * flush cache on last write release 1223 */ 1224 if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data) 1225 cdrom_close_write(cdi); 1226 1227 cdo->release(cdi); 1228 if (cdi->use_count == 0) { /* last process that closes dev*/ 1229 if (opened_for_data && 1230 cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY)) 1231 cdo->tray_move(cdi, 1); 1232 } 1233 return 0; 1234} 1235 1236static int cdrom_read_mech_status(struct cdrom_device_info *cdi, 1237 struct cdrom_changer_info *buf) 1238{ 1239 struct packet_command cgc; 1240 struct cdrom_device_ops *cdo = cdi->ops; 1241 int length; 1242 1243 /* 1244 * Sanyo changer isn't spec compliant (doesn't use regular change 1245 * LOAD_UNLOAD command, and it doesn't implement the mech status 1246 * command below 1247 */ 1248 if (cdi->sanyo_slot) { 1249 buf->hdr.nslots = 3; 1250 buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot; 1251 for (length = 0; length < 3; length++) { 1252 buf->slots[length].disc_present = 1; 1253 buf->slots[length].change = 0; 1254 } 1255 return 0; 1256 } 1257 1258 length = sizeof(struct cdrom_mechstat_header) + 1259 cdi->capacity * sizeof(struct cdrom_slot); 1260 1261 init_cdrom_command(&cgc, buf, length, CGC_DATA_READ); 1262 cgc.cmd[0] = GPCMD_MECHANISM_STATUS; 1263 cgc.cmd[8] = (length >> 8) & 0xff; 1264 cgc.cmd[9] = length & 0xff; 1265 return cdo->generic_packet(cdi, &cgc); 1266} 1267 1268static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot) 1269{ 1270 struct cdrom_changer_info *info; 1271 int ret; 1272 1273 cdinfo(CD_CHANGER, "entering cdrom_slot_status()\n"); 1274 if (cdi->sanyo_slot) 1275 return CDS_NO_INFO; 1276 1277 info = kmalloc(sizeof(*info), GFP_KERNEL); 1278 if (!info) 1279 return -ENOMEM; 1280 1281 if ((ret = cdrom_read_mech_status(cdi, info))) 1282 goto out_free; 1283 1284 if (info->slots[slot].disc_present) 1285 ret = CDS_DISC_OK; 1286 else 1287 ret = CDS_NO_DISC; 1288 1289out_free: 1290 kfree(info); 1291 return ret; 1292} 1293 1294/* Return the number of slots for an ATAPI/SCSI cdrom, 1295 * return 1 if not a changer. 1296 */ 1297int cdrom_number_of_slots(struct cdrom_device_info *cdi) 1298{ 1299 int status; 1300 int nslots = 1; 1301 struct cdrom_changer_info *info; 1302 1303 cdinfo(CD_CHANGER, "entering cdrom_number_of_slots()\n"); 1304 /* cdrom_read_mech_status requires a valid value for capacity: */ 1305 cdi->capacity = 0; 1306 1307 info = kmalloc(sizeof(*info), GFP_KERNEL); 1308 if (!info) 1309 return -ENOMEM; 1310 1311 if ((status = cdrom_read_mech_status(cdi, info)) == 0) 1312 nslots = info->hdr.nslots; 1313 1314 kfree(info); 1315 return nslots; 1316} 1317 1318 1319/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */ 1320static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot) 1321{ 1322 struct packet_command cgc; 1323 1324 cdinfo(CD_CHANGER, "entering cdrom_load_unload()\n"); 1325 if (cdi->sanyo_slot && slot < 0) 1326 return 0; 1327 1328 init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE); 1329 cgc.cmd[0] = GPCMD_LOAD_UNLOAD; 1330 cgc.cmd[4] = 2 + (slot >= 0); 1331 cgc.cmd[8] = slot; 1332 cgc.timeout = 60 * HZ; 1333 1334 /* The Sanyo 3 CD changer uses byte 7 of the 1335 GPCMD_TEST_UNIT_READY to command to switch CDs instead of 1336 using the GPCMD_LOAD_UNLOAD opcode. */ 1337 if (cdi->sanyo_slot && -1 < slot) { 1338 cgc.cmd[0] = GPCMD_TEST_UNIT_READY; 1339 cgc.cmd[7] = slot; 1340 cgc.cmd[4] = cgc.cmd[8] = 0; 1341 cdi->sanyo_slot = slot ? slot : 3; 1342 } 1343 1344 return cdi->ops->generic_packet(cdi, &cgc); 1345} 1346 1347static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot) 1348{ 1349 struct cdrom_changer_info *info; 1350 int curslot; 1351 int ret; 1352 1353 cdinfo(CD_CHANGER, "entering cdrom_select_disc()\n"); 1354 if (!CDROM_CAN(CDC_SELECT_DISC)) 1355 return -EDRIVE_CANT_DO_THIS; 1356 1357 (void) cdi->ops->media_changed(cdi, slot); 1358 1359 if (slot == CDSL_NONE) { 1360 /* set media changed bits, on both queues */ 1361 cdi->mc_flags = 0x3; 1362 return cdrom_load_unload(cdi, -1); 1363 } 1364 1365 info = kmalloc(sizeof(*info), GFP_KERNEL); 1366 if (!info) 1367 return -ENOMEM; 1368 1369 if ((ret = cdrom_read_mech_status(cdi, info))) { 1370 kfree(info); 1371 return ret; 1372 } 1373 1374 curslot = info->hdr.curslot; 1375 kfree(info); 1376 1377 if (cdi->use_count > 1 || keeplocked) { 1378 if (slot == CDSL_CURRENT) { 1379 return curslot; 1380 } else { 1381 return -EBUSY; 1382 } 1383 } 1384 1385 /* Specifying CDSL_CURRENT will attempt to load the currnet slot, 1386 which is useful if it had been previously unloaded. 1387 Whether it can or not, it returns the current slot. 1388 Similarly, if slot happens to be the current one, we still 1389 try and load it. */ 1390 if (slot == CDSL_CURRENT) 1391 slot = curslot; 1392 1393 /* set media changed bits on both queues */ 1394 cdi->mc_flags = 0x3; 1395 if ((ret = cdrom_load_unload(cdi, slot))) 1396 return ret; 1397 1398 return slot; 1399} 1400 1401/* We want to make media_changed accessible to the user through an 1402 * ioctl. The main problem now is that we must double-buffer the 1403 * low-level implementation, to assure that the VFS and the user both 1404 * see a medium change once. 1405 */ 1406 1407static 1408int media_changed(struct cdrom_device_info *cdi, int queue) 1409{ 1410 unsigned int mask = (1 << (queue & 1)); 1411 int ret = !!(cdi->mc_flags & mask); 1412 1413 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1414 return ret; 1415 /* changed since last call? */ 1416 if (cdi->ops->media_changed(cdi, CDSL_CURRENT)) { 1417 cdi->mc_flags = 0x3; /* set bit on both queues */ 1418 ret |= 1; 1419 cdi->media_written = 0; 1420 } 1421 cdi->mc_flags &= ~mask; /* clear bit */ 1422 return ret; 1423} 1424 1425int cdrom_media_changed(struct cdrom_device_info *cdi) 1426{ 1427 /* This talks to the VFS, which doesn't like errors - just 1 or 0. 1428 * Returning "0" is always safe (media hasn't been changed). Do that 1429 * if the low-level cdrom driver dosn't support media changed. */ 1430 if (cdi == NULL || cdi->ops->media_changed == NULL) 1431 return 0; 1432 if (!CDROM_CAN(CDC_MEDIA_CHANGED)) 1433 return 0; 1434 return media_changed(cdi, 0); 1435} 1436 1437/* badly broken, I know. Is due for a fixup anytime. */ 1438static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype* tracks) 1439{ 1440 struct cdrom_tochdr header; 1441 struct cdrom_tocentry entry; 1442 int ret, i; 1443 tracks->data=0; 1444 tracks->audio=0; 1445 tracks->cdi=0; 1446 tracks->xa=0; 1447 tracks->error=0; 1448 cdinfo(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n"); 1449 if (!CDROM_CAN(CDC_PLAY_AUDIO)) { 1450 tracks->error=CDS_NO_INFO; 1451 return; 1452 } 1453 /* Grab the TOC header so we can see how many tracks there are */ 1454 if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header))) { 1455 if (ret == -ENOMEDIUM) 1456 tracks->error = CDS_NO_DISC; 1457 else 1458 tracks->error = CDS_NO_INFO; 1459 return; 1460 } 1461 /* check what type of tracks are on this disc */ 1462 entry.cdte_format = CDROM_MSF; 1463 for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) { 1464 entry.cdte_track = i; 1465 if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) { 1466 tracks->error=CDS_NO_INFO; 1467 return; 1468 } 1469 if (entry.cdte_ctrl & CDROM_DATA_TRACK) { 1470 if (entry.cdte_format == 0x10) 1471 tracks->cdi++; 1472 else if (entry.cdte_format == 0x20) 1473 tracks->xa++; 1474 else 1475 tracks->data++; 1476 } else 1477 tracks->audio++; 1478 cdinfo(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n", 1479 i, entry.cdte_format, entry.cdte_ctrl); 1480 } 1481 cdinfo(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n", 1482 header.cdth_trk1, tracks->audio, tracks->data, 1483 tracks->cdi, tracks->xa); 1484} 1485 1486/* Requests to the low-level drivers will /always/ be done in the 1487 following format convention: 1488 1489 CDROM_LBA: all data-related requests. 1490 CDROM_MSF: all audio-related requests. 1491 1492 However, a low-level implementation is allowed to refuse this 1493 request, and return information in its own favorite format. 1494 1495 It doesn't make sense /at all/ to ask for a play_audio in LBA 1496 format, or ask for multi-session info in MSF format. However, for 1497 backward compatibility these format requests will be satisfied, but 1498 the requests to the low-level drivers will be sanitized in the more 1499 meaningful format indicated above. 1500 */ 1501 1502static 1503void sanitize_format(union cdrom_addr *addr, 1504 u_char * curr, u_char requested) 1505{ 1506 if (*curr == requested) 1507 return; /* nothing to be done! */ 1508 if (requested == CDROM_LBA) { 1509 addr->lba = (int) addr->msf.frame + 1510 75 * (addr->msf.second - 2 + 60 * addr->msf.minute); 1511 } else { /* CDROM_MSF */ 1512 int lba = addr->lba; 1513 addr->msf.frame = lba % 75; 1514 lba /= 75; 1515 lba += 2; 1516 addr->msf.second = lba % 60; 1517 addr->msf.minute = lba / 60; 1518 } 1519 *curr = requested; 1520} 1521 1522void init_cdrom_command(struct packet_command *cgc, void *buf, int len, 1523 int type) 1524{ 1525 memset(cgc, 0, sizeof(struct packet_command)); 1526 if (buf) 1527 memset(buf, 0, len); 1528 cgc->buffer = (char *) buf; 1529 cgc->buflen = len; 1530 cgc->data_direction = type; 1531 cgc->timeout = 5*HZ; 1532} 1533 1534/* DVD handling */ 1535 1536#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key)) 1537#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge)) 1538 1539static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type) 1540{ 1541 cgc->cmd[0] = GPCMD_REPORT_KEY; 1542 cgc->cmd[10] = type | (agid << 6); 1543 switch (type) { 1544 case 0: case 8: case 5: { 1545 cgc->buflen = 8; 1546 break; 1547 } 1548 case 1: { 1549 cgc->buflen = 16; 1550 break; 1551 } 1552 case 2: case 4: { 1553 cgc->buflen = 12; 1554 break; 1555 } 1556 } 1557 cgc->cmd[9] = cgc->buflen; 1558 cgc->data_direction = CGC_DATA_READ; 1559} 1560 1561static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type) 1562{ 1563 cgc->cmd[0] = GPCMD_SEND_KEY; 1564 cgc->cmd[10] = type | (agid << 6); 1565 switch (type) { 1566 case 1: { 1567 cgc->buflen = 16; 1568 break; 1569 } 1570 case 3: { 1571 cgc->buflen = 12; 1572 break; 1573 } 1574 case 6: { 1575 cgc->buflen = 8; 1576 break; 1577 } 1578 } 1579 cgc->cmd[9] = cgc->buflen; 1580 cgc->data_direction = CGC_DATA_WRITE; 1581} 1582 1583static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai) 1584{ 1585 int ret; 1586 u_char buf[20]; 1587 struct packet_command cgc; 1588 struct cdrom_device_ops *cdo = cdi->ops; 1589 rpc_state_t rpc_state; 1590 1591 memset(buf, 0, sizeof(buf)); 1592 init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ); 1593 1594 switch (ai->type) { 1595 /* LU data send */ 1596 case DVD_LU_SEND_AGID: 1597 cdinfo(CD_DVD, "entering DVD_LU_SEND_AGID\n"); 1598 cgc.quiet = 1; 1599 setup_report_key(&cgc, ai->lsa.agid, 0); 1600 1601 if ((ret = cdo->generic_packet(cdi, &cgc))) 1602 return ret; 1603 1604 ai->lsa.agid = buf[7] >> 6; 1605 /* Returning data, let host change state */ 1606 break; 1607 1608 case DVD_LU_SEND_KEY1: 1609 cdinfo(CD_DVD, "entering DVD_LU_SEND_KEY1\n"); 1610 setup_report_key(&cgc, ai->lsk.agid, 2); 1611 1612 if ((ret = cdo->generic_packet(cdi, &cgc))) 1613 return ret; 1614 1615 copy_key(ai->lsk.key, &buf[4]); 1616 /* Returning data, let host change state */ 1617 break; 1618 1619 case DVD_LU_SEND_CHALLENGE: 1620 cdinfo(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n"); 1621 setup_report_key(&cgc, ai->lsc.agid, 1); 1622 1623 if ((ret = cdo->generic_packet(cdi, &cgc))) 1624 return ret; 1625 1626 copy_chal(ai->lsc.chal, &buf[4]); 1627 /* Returning data, let host change state */ 1628 break; 1629 1630 /* Post-auth key */ 1631 case DVD_LU_SEND_TITLE_KEY: 1632 cdinfo(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n"); 1633 cgc.quiet = 1; 1634 setup_report_key(&cgc, ai->lstk.agid, 4); 1635 cgc.cmd[5] = ai->lstk.lba; 1636 cgc.cmd[4] = ai->lstk.lba >> 8; 1637 cgc.cmd[3] = ai->lstk.lba >> 16; 1638 cgc.cmd[2] = ai->lstk.lba >> 24; 1639 1640 if ((ret = cdo->generic_packet(cdi, &cgc))) 1641 return ret; 1642 1643 ai->lstk.cpm = (buf[4] >> 7) & 1; 1644 ai->lstk.cp_sec = (buf[4] >> 6) & 1; 1645 ai->lstk.cgms = (buf[4] >> 4) & 3; 1646 copy_key(ai->lstk.title_key, &buf[5]); 1647 /* Returning data, let host change state */ 1648 break; 1649 1650 case DVD_LU_SEND_ASF: 1651 cdinfo(CD_DVD, "entering DVD_LU_SEND_ASF\n"); 1652 setup_report_key(&cgc, ai->lsasf.agid, 5); 1653 1654 if ((ret = cdo->generic_packet(cdi, &cgc))) 1655 return ret; 1656 1657 ai->lsasf.asf = buf[7] & 1; 1658 break; 1659 1660 /* LU data receive (LU changes state) */ 1661 case DVD_HOST_SEND_CHALLENGE: 1662 cdinfo(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n"); 1663 setup_send_key(&cgc, ai->hsc.agid, 1); 1664 buf[1] = 0xe; 1665 copy_chal(&buf[4], ai->hsc.chal); 1666 1667 if ((ret = cdo->generic_packet(cdi, &cgc))) 1668 return ret; 1669 1670 ai->type = DVD_LU_SEND_KEY1; 1671 break; 1672 1673 case DVD_HOST_SEND_KEY2: 1674 cdinfo(CD_DVD, "entering DVD_HOST_SEND_KEY2\n"); 1675 setup_send_key(&cgc, ai->hsk.agid, 3); 1676 buf[1] = 0xa; 1677 copy_key(&buf[4], ai->hsk.key); 1678 1679 if ((ret = cdo->generic_packet(cdi, &cgc))) { 1680 ai->type = DVD_AUTH_FAILURE; 1681 return ret; 1682 } 1683 ai->type = DVD_AUTH_ESTABLISHED; 1684 break; 1685 1686 /* Misc */ 1687 case DVD_INVALIDATE_AGID: 1688 cgc.quiet = 1; 1689 cdinfo(CD_DVD, "entering DVD_INVALIDATE_AGID\n"); 1690 setup_report_key(&cgc, ai->lsa.agid, 0x3f); 1691 if ((ret = cdo->generic_packet(cdi, &cgc))) 1692 return ret; 1693 break; 1694 1695 /* Get region settings */ 1696 case DVD_LU_SEND_RPC_STATE: 1697 cdinfo(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n"); 1698 setup_report_key(&cgc, 0, 8); 1699 memset(&rpc_state, 0, sizeof(rpc_state_t)); 1700 cgc.buffer = (char *) &rpc_state; 1701 1702 if ((ret = cdo->generic_packet(cdi, &cgc))) 1703 return ret; 1704 1705 ai->lrpcs.type = rpc_state.type_code; 1706 ai->lrpcs.vra = rpc_state.vra; 1707 ai->lrpcs.ucca = rpc_state.ucca; 1708 ai->lrpcs.region_mask = rpc_state.region_mask; 1709 ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme; 1710 break; 1711 1712 /* Set region settings */ 1713 case DVD_HOST_SEND_RPC_STATE: 1714 cdinfo(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n"); 1715 setup_send_key(&cgc, 0, 6); 1716 buf[1] = 6; 1717 buf[4] = ai->hrpcs.pdrc; 1718 1719 if ((ret = cdo->generic_packet(cdi, &cgc))) 1720 return ret; 1721 break; 1722 1723 default: 1724 cdinfo(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type); 1725 return -ENOTTY; 1726 } 1727 1728 return 0; 1729} 1730 1731static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s) 1732{ 1733 unsigned char buf[21], *base; 1734 struct dvd_layer *layer; 1735 struct packet_command cgc; 1736 struct cdrom_device_ops *cdo = cdi->ops; 1737 int ret, layer_num = s->physical.layer_num; 1738 1739 if (layer_num >= DVD_LAYERS) 1740 return -EINVAL; 1741 1742 init_cdrom_command(&cgc, buf, sizeof(buf), CGC_DATA_READ); 1743 cgc.cmd[0] = GPCMD_READ_DVD_STRUCTURE; 1744 cgc.cmd[6] = layer_num; 1745 cgc.cmd[7] = s->type; 1746 cgc.cmd[9] = cgc.buflen & 0xff; 1747 1748 /* 1749 * refrain from reporting errors on non-existing layers (mainly) 1750 */ 1751 cgc.quiet = 1; 1752 1753 if ((ret = cdo->generic_packet(cdi, &cgc))) 1754 return ret; 1755 1756 base = &buf[4]; 1757 layer = &s->physical.layer[layer_num]; 1758 1759 /* 1760 * pla…
Large files files are truncated, but you can click here to view the full file