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+ * 1.00 Oct 31, 1994 -- Initial version.
+ * 1.01 Nov 2, 1994 -- Fixed problem with starting request in
+ * cdrom_check_status.
+ * 1.03 Nov 25, 1994 -- leaving unmask_intr as a user-setting (as for disks)
+ * (from mlord) -- minor changes to cdrom_setup()
+ * -- renamed ide_dev_s to ide_drive_t, enable irq on command
+ * 2.00 Nov 27, 1994 -- Generalize packet command interface;
+ * add audio ioctls.
+ * 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices
+ * which send an interrupt when ready for a command.
+ * 2.02 Dec 11, 1994 -- Cache the TOC in the driver.
+ * Don't use SCMD_PLAYAUDIO_TI; it's not included
+ * in the current version of ATAPI.
+ * Try to use LBA instead of track or MSF addressing
+ * when possible.
+ * Don't wait for READY_STAT.
+ * 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes
+ * other than 2k and to move multiple sectors in a
+ * single transaction.
+ * 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives.
+ * Thanks to Nick Saw <email@example.com> for
+ * help in figuring this out. Ditto for Acer and
+ * Aztech drives, which seem to have the same problem.
+ * 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml
+ * 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request
+ * or data protect error.
+ * Use HWIF and DEV_HWIF macros as in ide.c.
+ * Always try to do a request_sense after
+ * a failed command.
+ * Include an option to give textual descriptions
+ * of ATAPI errors.
+ * Fix a bug in handling the sector cache which
+ * showed up if the drive returned data in 512 byte
+ * blocks (like Pioneer drives). Thanks to
+ * Richard Hirst <firstname.lastname@example.org> for diagnosing this.
+ * Properly supply the page number field in the
+ * MODE_SELECT command.
+ * PLAYAUDIO12 is broken on the Aztech; work around it.
+ * 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c
+ * (my apologies to Scott, but now ide-cd.c is independent)
+ * 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl.
+ * Implement CDROMREADAUDIO ioctl (UNTESTED).
+ * Use input_ide_data() and output_ide_data().
+ * Add door locking.
+ * Fix usage count leak in cdrom_open, which happened
+ * when a read-write mount was attempted.
+ * Try to load the disk on open.
+ * Implement CDROMEJECT_SW ioctl (off by default).
+ * Read total cdrom capacity during open.
+ * Rearrange logic in cdrom_decode_status. Issue
+ * request sense commands for failed packet commands
+ * from here instead of from cdrom_queue_packet_command.
+ * Fix a race condition in retrieving error information.
+ * Suppress printing normal unit attention errors and
+ * some drive not ready errors.
+ * Implement CDROMVOLREAD ioctl.
+ * Implement CDROMREADMODE1/2 ioctls.
+ * Fix race condition in setting up interrupt handlers
+ * when the `serialize' option is used.
+ * 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in
+ * cdrom_queue_request.
+ * Another try at using ide_[input,output]_data.
+ * 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well.
+ * Make VERBOSE_IDE_CD_ERRORS dump failed command again.
+ * Dump out more information for ILLEGAL REQUEST errs.
+ * Fix handling of errors occurring before the
+ * packet command is transferred.
+ * Fix transfers with odd bytelengths.
+ * 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'.
+ * `DCI-2S10' drives are broken too.
+ * 3.04 Nov 20, 1995 -- So are Vertos drives.
+ * 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c
+ * 3.06 Dec 16, 1995 -- Add support needed for partitions.
+ * More workarounds for Vertos bugs (based on patches
+ * from Holger Dietze <email@example.com>).
+ * Try to eliminate byteorder assumptions.
+ * Use atapi_cdrom_subchnl struct definition.
+ * Add STANDARD_ATAPI compilation option.
+ * 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D,
+ * Vertos 300.
+ * Add NO_DOOR_LOCKING configuration option.
+ * Handle drive_cmd requests w/NULL args (for hdparm -t).
+ * Work around sporadic Sony55e audio play problem.
+ * 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix
+ * problem with "hde=cdrom" with no drive present. -ml
+ * 3.08 Mar 6, 1996 -- More Vertos workarounds.
+ * 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl.
+ * Switch to using MSF addressing for audio commands.
+ * Reformat to match kernel tabbing style.
+ * Add CDROM_GET_UPC ioctl.
+ * 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI.
+ * 3.11 Apr 29, 1996 -- Patch from Heiko Eißfeldt <firstname.lastname@example.org>
+ * to remove redundant verify_area calls.
+ * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches
+ * from Gerhard Zuber <email@example.com>.
+ * Let open succeed even if there's no loaded disc.
+ * 3.13 May 19, 1996 -- Fixes for changer code.
+ * 3.14 May 29, 1996 -- Add work-around for Vertos 600.
+ * (From Hennus Bergman <firstname.lastname@example.org>.)
+ * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers
+ * from Ben Galliart <email@example.com> with
+ * special help from Jeff Lightfoot
+ * <firstname.lastname@example.org>
+ * 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification
+ * 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl.
+ * 3.17 Sep 17, 1996 -- Tweak audio reads for some drives.
+ * Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC.
+ * 3.18 Oct 31, 1996 -- Added module and DMA support.
+ * 4.00 Nov 5, 1996 -- New ide-cd maintainer,
+ * Erik B. Andersen <email@example.com>
+ * -- Newer Creative drives don't always set the error
+ * register correctly. Make sure we see media changes
+ * regardless.
+ * -- Integrate with generic cdrom driver.
+ * -- CDROMGETSPINDOWN and CDROMSETSPINDOWN ioctls, based on
+ * a patch from Ciro Cattuto <>.
+ * -- Call set_device_ro.
+ * -- Implement CDROMMECHANISMSTATUS and CDROMSLOTTABLE
+ * ioctls, based on patch by Erik Andersen
+ * -- Add some probes of drive capability during setup.
+ * 4.01 Nov 11, 1996 -- Split into ide-cd.c and ide-cd.h
+ * -- Removed CDROMMECHANISMSTATUS and CDROMSLOTTABLE
+ * ioctls in favor of a generalized approach
+ * using the generic cdrom driver.
+ * -- Fully integrated with the 2.1.X kernel.
+ * -- Other stuff that I forgot (lots of changes)
+ * 4.02 Dec 01, 1996 -- Applied patch from Gadi Oxman <firstname.lastname@example.org>
+ * to fix the drive door locking problems.
+ * 4.03 Dec 04, 1996 -- Added DSC overlap support.
+ * 4.04 Dec 29, 1996 -- Added CDROMREADRAW ioclt based on patch
+ * by Ales Makarov (email@example.com)
+ * 4.05 Nov 20, 1997 -- Modified to print more drive info on init
+ * Minor other changes
+ * Fix errors on CDROMSTOP (If you have a "Dolphin",
+ * you must define IHAVEADOLPHIN)
+ * Added identifier so new Sanyo CD-changer works
+ * Better detection if door locking isn't supported
+ * 4.06 Dec 17, 1997 -- fixed endless "tray open" messages -ml
+ * 4.07 Dec 17, 1997 -- fallback to set pc->stat on "tray open"
+ * 4.08 Dec 18, 1997 -- spew less noise when tray is empty
+ * -- fix speed display for ACER 24X, 18X
+ * 4.09 Jan 04, 1998 -- fix handling of the last block so we return
+ * an end of file instead of an I/O error (Gadi)
+ * 4.10 Jan 24, 1998 -- fixed a bug so now changers can change to a new
+ * slot when there is no disc in the current slot.
+ * -- Fixed a memory leak where info->changer_info was
+ * malloc'ed but never free'd when closing the device.
+ * -- Cleaned up the global namespace a bit by making more
+ * functions static that should already have been.
+ * 4.11 Mar 12, 1998 -- Added support for the CDROM_SELECT_SPEED ioctl
+ * based on a patch for 2.0.33 by Jelle Foks
+ * <firstname.lastname@example.org>, a patch for 2.0.33
+ * by Toni Giorgino <email@example.com>, the SCSI
+ * version, and my own efforts. -erik
+ * -- Fixed a stupid bug which egcs was kind enough to
+ * inform me of where "Illegal mode for this track"
+ * was never returned due to a comparison on data
+ * types of limited range.
+ * 4.12 Mar 29, 1998 -- Fixed bug in CDROM_SELECT_SPEED so write speed is
+ * now set ionly for CD-R and CD-RW drives. I had
+ * removed this support because it produced errors.
+ * It produced errors _only_ for non-writers. duh.
+ * 4.13 May 05, 1998 -- Suppress useless "in progress of becoming ready"
+ * messages, since this is not an error.
+ * -- Change error messages to be const
+ * -- Remove a "\t" which looks ugly in the syslogs
+ * 4.14 July 17, 1998 -- Change to pointing to .ps version of ATAPI spec
+ * since the .pdf version doesn't seem to work...
+ * -- Updated the TODO list to something more current.
+ * 4.15 Aug 25, 1998 -- Updated ide-cd.h to respect machine endianness,
+ * patch thanks to "Eddie C. Dost" <firstname.lastname@example.org>
+ * 4.50 Oct 19, 1998 -- New maintainers!
+ * Jens Axboe <email@example.com>
+ * Chris Zwilling <firstname.lastname@example.org>
+ * 4.51 Dec 23, 1998 -- Jens Axboe <email@example.com>
+ * - ide_cdrom_reset enabled since the ide subsystem
+ * handles resets fine now. <firstname.lastname@example.org>
+ * - Transfer size fix for Samsung CD-ROMs, thanks to
+ * "Ville Hallik" <email@example.com>.
+ * - other minor stuff.
+ * 4.52 Jan 19, 1999 -- Jens Axboe <firstname.lastname@example.org>
+ * - Detect DVD-ROM/RAM drives
+ * 4.53 Feb 22, 1999 - Include other model Samsung and one Goldstar
+ * drive in transfer size limit.
+ * - Fix the I/O error when doing eject without a medium
+ * loaded on some drives.
+ * - CDROMREADMODE2 is now implemented through
+ * CDROMREADRAW, since many drives don't support
+ * MODE2 (even though ATAPI 2.6 says they must).
+ * - Added ignore parameter to ide-cd (as a module), eg
+ * insmod ide-cd ignore='hda hdb'
+ * Useful when using ide-cd in conjunction with
+ * ide-scsi. TODO: non-modular way of doing the
+ * same.
+ * 4.54 Aug 5, 1999 - Support for MMC2 class commands through the generic
+ * packet interface to cdrom.c.
+ * - Unified audio ioctl support, most of it.
+ * - cleaned up various deprecated verify_area().
+ * - Added ide_cdrom_packet() as the interface for
+ * the Uniform generic_packet().
+ * - bunch of other stuff, will fill in logs later.
+ * - report 1 slot for non-changers, like the other
+ * cd-rom drivers. don't report select disc for
+ * non-changers as well.
+ * - mask out audio playing, if the device can't do it.
+ * 4.55 Sep 1, 1999 - Eliminated the rest of the audio ioctls, except
+ * for CDROMREADTOC[ENTRY|HEADER]. Some of the drivers
+ * use this independently of the actual audio handling.
+ * They will disappear later when I get the time to
+ * do it cleanly.
+ * - Minimize the TOC reading - only do it when we
+ * know a media change has occurred.
+ * - Moved all the CDROMREADx ioctls to the Uniform layer.
+ * - Heiko Eißfeldt <email@example.com> supplied
+ * some fixes for CDI.
+ * - CD-ROM leaving door locked fix from Andries
+ * Brouwer <Andries.Brouwer@cwi.nl>
+ * - Erik Andersen <firstname.lastname@example.org> unified
+ * commands across the various drivers and how
+ * sense errors are handled.
+ * 4.56 Sep 12, 1999 - Removed changer support - it is now in the
+ * Uniform layer.
+ * - Added partition based multisession handling.
+ * - Mode sense and mode select moved to the
+ * Uniform layer.
+ * - Fixed a problem with WPI CDS-32X drive - it
+ * failed the capabilities
+ * 4.57 Apr 7, 2000 - Fixed sense reporting.
+ * - Fixed possible oops in ide_cdrom_get_last_session()
+ * - Fix locking mania and make ide_cdrom_reset relock
+ * - Stop spewing errors to log when magicdev polls with
+ * TEST_UNIT_READY on some drives.
+ * - Various fixes from Tobias Ringstrom:
+ * tray if it was locked prior to the reset.
+ * - cdrom_read_capacity returns one frame too little.
+ * - Fix real capacity reporting.
+ * 4.58 May 1, 2000 - Clean up ACER50 stuff.
+ * - Fix small problem with ide_cdrom_capacity
+ * 4.59 Aug 11, 2000 - Fix changer problem in cdrom_read_toc, we weren't
+ * correctly sensing a disc change.
+ * - Rearranged some code
+ * - Use extended sense on drives that support it for
+ * correctly reporting tray status -- from
+ * Michael D Johnson <email@example.com>
+ * 4.60 Dec 17, 2003 - Add mt rainier support
+ * - Bump timeout for packet commands, matches sr
+ * - Odd stuff
+ * 4.61 Jan 22, 2004 - support hardware sector sizes other than 2kB,
+ * Pascal Schmidt <firstname.lastname@example.org>