Diffstat (limited to 'Documentation/ide')
7 files changed, 939 insertions, 0 deletions
diff --git a/Documentation/ide/00-INDEX b/Documentation/ide/00-INDEX
new file mode 100644
@@ -0,0 +1,12 @@
+ - this file
+ - ide-cd changelog
+ - ide-floppy changelog
+ - ide-tape changelog
+ - info on the IDE ATAPI streaming tape driver
+ - important info for users of ATA devices (IDE/EIDE disks and CD-ROMS).
diff --git a/Documentation/ide/ChangeLog.ide-cd.1994-2004 b/Documentation/ide/ChangeLog.ide-cd.1994-2004
new file mode 100644
@@ -0,0 +1,268 @@
+ * 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 <firstname.lastname@example.org> 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 <email@example.com> 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 <firstname.lastname@example.org>).
+ * 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 <email@example.com>
+ * to remove redundant verify_area calls.
+ * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches
+ * from Gerhard Zuber <firstname.lastname@example.org>.
+ * 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 <email@example.com>.)
+ * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers
+ * from Ben Galliart <firstname.lastname@example.org> with
+ * special help from Jeff Lightfoot
+ * <email@example.com>
+ * 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 <firstname.lastname@example.org>
+ * -- 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 <email@example.com>
+ * 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 (firstname.lastname@example.org)
+ * 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
+ * <email@example.com>, a patch for 2.0.33
+ * by Toni Giorgino <firstname.lastname@example.org>, 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" <email@example.com>
+ * 4.50 Oct 19, 1998 -- New maintainers!
+ * Jens Axboe <firstname.lastname@example.org>
+ * Chris Zwilling <email@example.com>
+ * 4.51 Dec 23, 1998 -- Jens Axboe <firstname.lastname@example.org>
+ * - ide_cdrom_reset enabled since the ide subsystem
+ * handles resets fine now. <email@example.com>
+ * - Transfer size fix for Samsung CD-ROMs, thanks to
+ * "Ville Hallik" <firstname.lastname@example.org>.
+ * - other minor stuff.
+ * 4.52 Jan 19, 1999 -- Jens Axboe <email@example.com>
+ * - 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 <firstname.lastname@example.org> supplied
+ * some fixes for CDI.
+ * - CD-ROM leaving door locked fix from Andries
+ * Brouwer <Andries.Brouwer@cwi.nl>
+ * - Erik Andersen <email@example.com> 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 <firstname.lastname@example.org>
+ * 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 <email@example.com>
diff --git a/Documentation/ide/ChangeLog.ide-floppy.1996-2002 b/Documentation/ide/ChangeLog.ide-floppy.1996-2002
new file mode 100644
@@ -0,0 +1,63 @@
+ * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many
+ * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive.
+ * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c.
+ * Ver 0.2 Oct 31 96 Minor changes.
+ * Ver 0.3 Dec 2 96 Fixed error recovery bug.
+ * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl.
+ * Ver 0.5 Feb 21 97 Add partitions support.
+ * Use the minimum of the LBA and CHS capacities.
+ * Avoid hwgroup->rq == NULL on the last irq.
+ * Fix potential null dereferencing with DEBUG_LOG.
+ * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds.
+ * Add media write-protect detection.
+ * Issue START command only if TEST UNIT READY fails.
+ * Add work-around for IOMEGA ZIP revision 21.D.
+ * Remove idefloppy_get_capabilities().
+ * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of
+ * bytes requested on each interrupt to be zero.
+ * Thanks to <firstname.lastname@example.org> for pointing this out.
+ * Ver 0.9.sv Jan 6 01 Sam Varshavchik <email@example.com>
+ * Implement low level formatting. Reimplemented
+ * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp
+ * bit. My LS-120 drive barfs on
+ * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me.
+ * Compromise by not reporting a failure to get this
+ * mode page. Implemented four IOCTLs in order to
+ * implement formatting. IOCTls begin with 0x4600,
+ * 0x46 is 'F' as in Format.
+ * Jan 9 01 Userland option to select format verify.
+ * Added PC_SUPPRESS_ERROR flag - some idefloppy drives
+ * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and
+ * return a sense error. Suppress error reporting in
+ * this particular case in order to avoid spurious
+ * errors in syslog. The culprit is
+ * idefloppy_get_capability_page(), so move it to
+ * idefloppy_begin_format() so that it's not used
+ * unless absolutely necessary.
+ * If drive does not support format progress indication
+ * monitor the dsc bit in the status register.
+ * Also, O_NDELAY on open will allow the device to be
+ * opened without a disk available. This can be used to
+ * open an unformatted disk, or get the device capacity.
+ * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by
+ * <firstname.lastname@example.org>
+ * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this
+ * driver. Included Powerbook internal zip kludge.
+ * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive
+ * no disk on insert and disk change now works
+ * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere
+ * Ver 0.95 Nov 7 00 Brought across to kernel 2.4
+ * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0
+ * including set_bit patch from Rusty Russell
+ * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series
+ * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3
+ * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to
+ * fix a lost interrupt problem. It appears the busy
+ * bit was being deasserted by my IOMEGA ATAPI ZIP 100
+ * drive before the drive was actually ready.
+ * Ver 0.98a Oct 29 01 Expose delay value so we can play.
+ * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code
+ * to support new PocketZip drives
diff --git a/Documentation/ide/ChangeLog.ide-tape.1995-2002 b/Documentation/ide/ChangeLog.ide-tape.1995-2002
new file mode 100644
@@ -0,0 +1,257 @@
+ * Ver 0.1 Nov 1 95 Pre-working code :-)
+ * Ver 0.2 Nov 23 95 A short backup (few megabytes) and restore procedure
+ * was successful ! (Using tar cvf ... on the block
+ * device interface).
+ * A longer backup resulted in major swapping, bad
+ * overall Linux performance and eventually failed as
+ * we received non serial read-ahead requests from the
+ * buffer cache.
+ * Ver 0.3 Nov 28 95 Long backups are now possible, thanks to the
+ * character device interface. Linux's responsiveness
+ * and performance doesn't seem to be much affected
+ * from the background backup procedure.
+ * Some general mtio.h magnetic tape operations are
+ * now supported by our character device. As a result,
+ * popular tape utilities are starting to work with
+ * ide tapes :-)
+ * The following configurations were tested:
+ * 1. An IDE ATAPI TAPE shares the same interface
+ * and irq with an IDE ATAPI CDROM.
+ * 2. An IDE ATAPI TAPE shares the same interface
+ * and irq with a normal IDE disk.
+ * Both configurations seemed to work just fine !
+ * However, to be on the safe side, it is meanwhile
+ * recommended to give the IDE TAPE its own interface
+ * and irq.
+ * The one thing which needs to be done here is to
+ * add a "request postpone" feature to ide.c,
+ * so that we won't have to wait for the tape to finish
+ * performing a long media access (DSC) request (such
+ * as a rewind) before we can access the other device
+ * on the same interface. This effect doesn't disturb
+ * normal operation most of the time because read/write
+ * requests are relatively fast, and once we are
+ * performing one tape r/w request, a lot of requests
+ * from the other device can be queued and ide.c will
+ * service all of them after this single tape request.
+ * Ver 1.0 Dec 11 95 Integrated into Linux 1.3.46 development tree.
+ * On each read / write request, we now ask the drive
+ * if we can transfer a constant number of bytes
+ * (a parameter of the drive) only to its buffers,
+ * without causing actual media access. If we can't,
+ * we just wait until we can by polling the DSC bit.
+ * This ensures that while we are not transferring
+ * more bytes than the constant referred to above, the
+ * interrupt latency will not become too high and
+ * we won't cause an interrupt timeout, as happened
+ * occasionally in the previous version.
+ * While polling for DSC, the current request is
+ * postponed and ide.c is free to handle requests from
+ * the other device. This is handled transparently to
+ * ide.c. The hwgroup locking method which was used
+ * in the previous version was removed.
+ * Use of new general features which are provided by
+ * ide.c for use with atapi devices.
+ * (Programming done by Mark Lord)
+ * Few potential bug fixes (Again, suggested by Mark)
+ * Single character device data transfers are now
+ * not limited in size, as they were before.
+ * We are asking the tape about its recommended
+ * transfer unit and send a larger data transfer
+ * as several transfers of the above size.
+ * For best results, use an integral number of this
+ * basic unit (which is shown during driver
+ * initialization). I will soon add an ioctl to get
+ * this important parameter.
+ * Our data transfer buffer is allocated on startup,
+ * rather than before each data transfer. This should
+ * ensure that we will indeed have a data buffer.
+ * Ver 1.1 Dec 14 95 Fixed random problems which occurred when the tape
+ * shared an interface with another device.
+ * (poll_for_dsc was a complete mess).
+ * Removed some old (non-active) code which had
+ * to do with supporting buffer cache originated
+ * requests.
+ * The block device interface can now be opened, so
+ * that general ide driver features like the unmask
+ * interrupts flag can be selected with an ioctl.
+ * This is the only use of the block device interface.
+ * New fast pipelined operation mode (currently only on
+ * writes). When using the pipelined mode, the
+ * throughput can potentially reach the maximum
+ * tape supported throughput, regardless of the
+ * user backup program. On my tape drive, it sometimes
+ * boosted performance by a factor of 2. Pipelined
+ * mode is enabled by default, but since it has a few
+ * downfalls as well, you may want to disable it.
+ * A short explanation of the pipelined operation mode
+ * is available below.
+ * Ver 1.2 Jan 1 96 Eliminated pipelined mode race condition.
+ * Added pipeline read mode. As a result, restores
+ * are now as fast as backups.
+ * Optimized shared interface behavior. The new behavior
+ * typically results in better IDE bus efficiency and
+ * higher tape throughput.
+ * Pre-calculation of the expected read/write request
+ * service time, based on the tape's parameters. In
+ * the pipelined operation mode, this allows us to
+ * adjust our polling frequency to a much lower value,
+ * and thus to dramatically reduce our load on Linux,
+ * without any decrease in performance.
+ * Implemented additional mtio.h operations.
+ * The recommended user block size is returned by
+ * the MTIOCGET ioctl.
+ * Additional minor changes.
+ * Ver 1.3 Feb 9 96 Fixed pipelined read mode bug which prevented the
+ * use of some block sizes during a restore procedure.
+ * The character device interface will now present a
+ * continuous view of the media - any mix of block sizes
+ * during a backup/restore procedure is supported. The
+ * driver will buffer the requests internally and
+ * convert them to the tape's recommended transfer
+ * unit, making performance almost independent of the
+ * chosen user block size.
+ * Some improvements in error recovery.
+ * By cooperating with ide-dma.c, bus mastering DMA can
+ * now sometimes be used with IDE tape drives as well.
+ * Bus mastering DMA has the potential to dramatically
+ * reduce the CPU's overhead when accessing the device,
+ * and can be enabled by using hdparm -d1 on the tape's
+ * block device interface. For more info, read the
+ * comments in ide-dma.c.
+ * Ver 1.4 Mar 13 96 Fixed serialize support.
+ * Ver 1.5 Apr 12 96 Fixed shared interface operation, broken in 1.3.85.
+ * Fixed pipelined read mode inefficiency.
+ * Fixed nasty null dereferencing bug.
+ * Ver 1.6 Aug 16 96 Fixed FPU usage in the driver.
+ * Fixed end of media bug.
+ * Ver 1.7 Sep 10 96 Minor changes for the CONNER CTT8000-A model.
+ * Ver 1.8 Sep 26 96 Attempt to find a better balance between good
+ * interactive response and high system throughput.
+ * Ver 1.9 Nov 5 96 Automatically cross encountered filemarks rather
+ * than requiring an explicit FSF command.
+ * Abort pending requests at end of media.
+ * MTTELL was sometimes returning incorrect results.
+ * Return the real block size in the MTIOCGET ioctl.
+ * Some error recovery bug fixes.
+ * Ver 1.10 Nov 5 96 Major reorganization.
+ * Reduced CPU overhead a bit by eliminating internal
+ * bounce buffers.
+ * Added module support.
+ * Added multiple tape drives support.
+ * Added partition support.
+ * Rewrote DSC handling.
+ * Some portability fixes.
+ * Removed ide-tape.h.
+ * Additional minor changes.
+ * Ver 1.11 Dec 2 96 Bug fix in previous DSC timeout handling.
+ * Use ide_stall_queue() for DSC overlap.
+ * Use the maximum speed rather than the current speed
+ * to compute the request service time.
+ * Ver 1.12 Dec 7 97 Fix random memory overwriting and/or last block data
+ * corruption, which could occur if the total number
+ * of bytes written to the tape was not an integral
+ * number of tape blocks.
+ * Add support for INTERRUPT DRQ devices.
+ * Ver 1.13 Jan 2 98 Add "speed == 0" work-around for HP COLORADO 5GB
+ * Ver 1.14 Dec 30 98 Partial fixes for the Sony/AIWA tape drives.
+ * Replace cli()/sti() with hwgroup spinlocks.
+ * Ver 1.15 Mar 25 99 Fix SMP race condition by replacing hwgroup
+ * spinlock with private per-tape spinlock.
+ * Ver 1.16 Sep 1 99 Add OnStream tape support.
+ * Abort read pipeline on EOD.
+ * Wait for the tape to become ready in case it returns
+ * "in the process of becoming ready" on open().
+ * Fix zero padding of the last written block in
+ * case the tape block size is larger than PAGE_SIZE.
+ * Decrease the default disconnection time to tn.
+ * Ver 1.16e Oct 3 99 Minor fixes.
+ * Ver 1.16e1 Oct 13 99 Patches by Arnold Niessen,
+ * email@example.com / firstname.lastname@example.org
+ * GO-1) Undefined code in idetape_read_position
+ * according to Gadi's email
+ * AJN-1) Minor fix asc == 11 should be asc == 0x11
+ * in idetape_issue_packet_command (did effect
+ * debugging output only)
+ * AJN-2) Added more debugging output, and
+ * added ide-tape: where missing. I would also
+ * like to add tape->name where possible
+ * AJN-3) Added different debug_level's
+ * via /proc/ide/hdc/settings
+ * "debug_level" determines amount of debugging output;
+ * can be changed using /proc/ide/hdx/settings
+ * 0 : almost no debugging output
+ * 1 : 0+output errors only
+ * 2 : 1+output all sensekey/asc
+ * 3 : 2+follow all chrdev related procedures
+ * 4 : 3+follow all procedures
+ * 5 : 4+include pc_stack rq_stack info
+ * 6 : 5+USE_COUNT updates
+ * AJN-4) Fixed timeout for retension in idetape_queue_pc_tail
+ * from 5 to 10 minutes
+ * AJN-5) Changed maximum number of blocks to skip when
+ * reading tapes with multiple consecutive write
+ * errors from 100 to 1000 in idetape_get_logical_blk
+ * Proposed changes to code:
+ * 1) output "logical_blk_num" via /proc
+ * 2) output "current_operation" via /proc
+ * 3) Either solve or document the fact that `mt rewind' is
+ * required after reading from /dev/nhtx to be
+ * able to rmmod the idetape module;
+ * Also, sometimes an application finishes but the
+ * device remains `busy' for some time. Same cause ?
+ * Proposed changes to release-notes:
+ * 4) write a simple `quickstart' section in the
+ * release notes; I volunteer if you don't want to
+ * 5) include a pointer to video4linux in the doc
+ * to stimulate video applications
+ * 6) release notes lines 331 and 362: explain what happens
+ * if the application data rate is higher than 1100 KB/s;
+ * similar approach to lower-than-500 kB/s ?
+ * 7) 6.6 Comparison; wouldn't it be better to allow different
+ * strategies for read and write ?
+ * Wouldn't it be better to control the tape buffer
+ * contents instead of the bandwidth ?
+ * 8) line 536: replace will by would (if I understand
+ * this section correctly, a hypothetical and unwanted situation
+ * is being described)
+ * Ver 1.16f Dec 15 99 Change place of the secondary OnStream header frames.
+ * Ver 1.17 Nov 2000 / Jan 2001 Marcel Mol, email@example.com
+ * - Add idetape_onstream_mode_sense_tape_parameter_page
+ * function to get tape capacity in frames: tape->capacity.
+ * - Add support for DI-50 drives( or any DI- drive).
+ * - 'workaround' for read error/blank block around block 3000.
+ * - Implement Early warning for end of media for Onstream.
+ * - Cosmetic code changes for readability.
+ * - Idetape_position_tape should not use SKIP bit during
+ * Onstream read recovery.
+ * - Add capacity, logical_blk_num and first/last_frame_position
+ * to /proc/ide/hd?/settings.
+ * - Module use count was gone in the Linux 2.4 driver.
+ * Ver 1.17a Apr 2001 Willem Riede firstname.lastname@example.org
+ * - Get drive's actual block size from mode sense block descriptor
+ * - Limit size of pipeline
+ * Ver 1.17b Oct 2002 Alan Stern <email@example.com>
+ * Changed IDETAPE_MIN_PIPELINE_STAGES to 1 and actually used
+ * it in the code!
+ * Actually removed aborted stages in idetape_abort_pipeline
+ * instead of just changing the command code.
+ * Made the transfer byte count for Request Sense equal to the
+ * actual length of the data transfer.
+ * Changed handling of partial data transfers: they do not
+ * cause DMA errors.
+ * Moved initiation of DMA transfers to the correct place.
+ * Removed reference to unallocated memory.
+ * Made __idetape_discard_read_pipeline return the number of
+ * sectors skipped, not the number of stages.
+ * Replaced errant kfree() calls with __idetape_kfree_stage().
+ * Fixed off-by-one error in testing the pipeline length.
+ * Fixed handling of filemarks in the read pipeline.
+ * Small code optimization for MTBSF and MTBSFM ioctls.
+ * Don't try to unlock the door during device close if is
+ * already unlocked!
+ * Cosmetic fixes to miscellaneous debugging output messages.
+ * Set the minimum /proc/ide/hd?/settings values for "pipeline",
+ * "pipeline_min", and "pipeline_max" to 1.
diff --git a/Documentation/ide/ide-tape.txt b/Documentation/ide/ide-tape.txt
new file mode 100644
@@ -0,0 +1,65 @@
+IDE ATAPI streaming tape driver.
+This driver is a part of the Linux ide driver.
+The driver, in co-operation with ide.c, basically traverses the
+request-list for the block device interface. The character device
+interface, on the other hand, creates new requests, adds them
+to the request-list of the block device, and waits for their completion.
+The block device major and minor numbers are determined from the
+tape's relative position in the ide interfaces, as explained in ide.c.
+The character device interface consists of the following devices:
+ht0 major 37, minor 0 first IDE tape, rewind on close.
+ht1 major 37, minor 1 second IDE tape, rewind on close.
+nht0 major 37, minor 128 first IDE tape, no rewind on close.
+nht1 major 37, minor 129 second IDE tape, no rewind on close.
+The general magnetic tape commands compatible interface, as defined by
+include/linux/mtio.h, is accessible through the character device.
+General ide driver configuration options, such as the interrupt-unmask
+flag, can be configured by issuing an ioctl to the block device interface,
+as any other ide device.
+Our own ide-tape ioctl's can be issued to either the block device or
+the character device interface.
+Maximal throughput with minimal bus load will usually be achieved in the
+ 1. ide-tape is operating in the pipelined operation mode.
+ 2. No buffering is performed by the user backup program.
+Testing was done with a 2 GB CONNER CTMA 4000 IDE ATAPI Streaming Tape Drive.
+Here are some words from the first releases of hd.c, which are quoted
+in ide.c and apply here as well:
+| Special care is recommended. Have Fun!
+1. Support for the ATAPI overlap protocol.
+In order to maximize bus throughput, we currently use the DSC
+overlap method which enables ide.c to service requests from the
+other device while the tape is busy executing a command. The
+DSC overlap method involves polling the tape's status register
+for the DSC bit, and servicing the other device while the tape
+In the current QIC development standard (December 1995),
+it is recommended that new tape drives will *in addition*
+implement the ATAPI overlap protocol, which is used for the
+same purpose - efficient use of the IDE bus, but is interrupt
+driven and thus has much less CPU overhead.
+ATAPI overlap is likely to be supported in most new ATAPI
+devices, including new ATAPI cdroms, and thus provides us
+a method by which we can achieve higher throughput when
+sharing a (fast) ATA-2 disk with any (slow) new ATAPI device.
diff --git a/Documentation/ide/ide.txt b/Documentation/ide/ide.txt
new file mode 100644
@@ -0,0 +1,256 @@
+ Information regarding the Enhanced IDE drive in Linux 2.6
+ The hdparm utility can be used to control various IDE features on a
+ running system. It is packaged separately. Please Look for it on popular
+ linux FTP sites.
+*** IMPORTANT NOTICES: BUGGY IDE CHIPSETS CAN CORRUPT DATA!!
+*** PCI versions of the CMD640 and RZ1000 interfaces are now detected
+*** automatically at startup when PCI BIOS support is configured.
+*** Linux disables the "prefetch" ("readahead") mode of the RZ1000
+*** to prevent data corruption possible due to hardware design flaws.
+*** For the CMD640, linux disables "IRQ unmasking" (hdparm -u1) on any
+*** drive for which the "prefetch" mode of the CMD640 is turned on.
+*** If "prefetch" is disabled (hdparm -p8), then "IRQ unmasking" can be
+*** used again.
+*** For the CMD640, linux disables "32bit I/O" (hdparm -c1) on any drive
+*** for which the "prefetch" mode of the CMD640 is turned off.
+*** If "prefetch" is enabled (hdparm -p9), then "32bit I/O" can be
+*** used again.
+*** The CMD640 is also used on some Vesa Local Bus (VLB) cards, and is *NOT*
+*** automatically detected by Linux. For safe, reliable operation with such
+*** interfaces, one *MUST* use the "cmd640.probe_vlb" kernel option.
+*** Use of the "serialize" option is no longer necessary.
+- 40-conductor IDE cables are capable of transferring data in DMA modes up to
+ udma2, but no faster.
+- If possible devices should be attached to separate channels if they are
+ available. Typically the disk on the first and CD-ROM on the second.
+- If you mix devices on the same cable, please consider using similar devices
+ in respect of the data transfer mode they support.
+- Even better try to stick to the same vendor and device type on the same
+This is the multiple IDE interface driver, as evolved from hd.c.
+It supports up to 9 IDE interfaces per default, on one or more IRQs (usually
+14 & 15). There can be up to two drives per interface, as per the ATA-6 spec.
+Primary: ide0, port 0x1f0; major=3; hda is minor=0; hdb is minor=64
+Secondary: ide1, port 0x170; major=22; hdc is minor=0; hdd is minor=64
+Tertiary: ide2, port 0x1e8; major=33; hde is minor=0; hdf is minor=64
+Quaternary: ide3, port 0x168; major=34; hdg is minor=0; hdh is minor=64
+fifth.. ide4, usually PCI, probed
+sixth.. ide5, usually PCI, probed
+To access devices on interfaces > ide0, device entries please make sure that
+device files for them are present in /dev. If not, please create such
+entries, by using /dev/MAKEDEV.
+This driver automatically probes for most IDE interfaces (including all PCI
+ones), for the drives/geometries attached to those interfaces, and for the IRQ
+lines being used by the interfaces (normally 14, 15 for ide0/ide1).
+Any number of interfaces may share a single IRQ if necessary, at a slight
+performance penalty, whether on separate cards or a single VLB card.
+The IDE driver automatically detects and handles this. However, this may
+or may not be harmful to your hardware.. two or more cards driving the same IRQ
+can potentially burn each other's bus driver, though in practice this
+seldom occurs. Be careful, and if in doubt, don't do it!
+Drives are normally found by auto-probing and/or examining the CMOS/BIOS data.
+For really weird situations, the apparent (fdisk) geometry can also be specified
+on the kernel "command line" using LILO. The format of such lines is:
+ ide_core.chs=1.0:1050,32,64 ide_core.cdrom=1.1
+The results of successful auto-probing may override the physical geometry/irq
+specified, though the "original" geometry may be retained as the "logical"
+geometry for partitioning purposes (fdisk).
+If the auto-probing during boot time confuses a drive (ie. the drive works
+with hd.c but not with ide.c), then an command line option may be specified
+for each drive for which you'd like the drive to skip the hardware
+probe/identification sequence. For example:
+Note that when only one IDE device is attached to an interface, it should be
+jumpered as "single" or "master", *not* "slave". Many folks have had
+"trouble" with cdroms because of this requirement, so the driver now probes
+for both units, though success is more likely when the drive is jumpered
+Courtesy of Scott Snyder and others, the driver supports ATAPI cdrom drives
+such as the NEC-260 and the new MITSUMI triple/quad speed drives.
+Such drives will be identified at boot time, just like a hard disk.
+If for some reason your cdrom drive is *not* found at boot time, you can force
+the probe to look harder by supplying a kernel command line parameter
+via LILO, such as:
+ ide_core.cdrom=1.0 /* "master" on second interface (hdc) */
+ ide_core.cdrom=1.1 /* "slave" on second interface (hdd) */
+For example, a GW2000 system might have a hard drive on the primary
+interface (/dev/hda) and an IDE cdrom drive on the secondary interface
+(/dev/hdc). To mount a CD in the cdrom drive, one would use something like:
+ ln -sf /dev/hdc /dev/cdrom
+ mkdir /mnt/cdrom
+ mount /dev/cdrom /mnt/cdrom -t iso9660 -o ro
+If, after doing all of the above, mount doesn't work and you see
+errors from the driver (with dmesg) complaining about `status=0xff',
+this means that the hardware is not responding to the driver's attempts
+to read it. One of the following is probably the problem:
+ - Your hardware is broken.
+ - You are using the wrong address for the device, or you have the
+ drive jumpered wrong. Review the configuration instructions above.
+ - Your IDE controller requires some nonstandard initialization sequence
+ before it will work properly. If this is the case, there will often
+ be a separate MS-DOS driver just for the controller. IDE interfaces
+ on sound cards usually fall into this category. Such configurations
+ can often be made to work by first booting MS-DOS, loading the
+ appropriate drivers, and then warm-booting linux (without powering
+ off). This can be automated using loadlin in the MS-DOS autoexec.
+If you always get timeout errors, interrupts from the drive are probably
+not making it to the host. Check how you have the hardware jumpered
+and make sure it matches what the driver expects (see the configuration
+instructions above). If you have a PCI system, also check the BIOS
+setup; I've had one report of a system which was shipped with IRQ 15
+disabled by the BIOS.
+The kernel is able to execute binaries directly off of the cdrom,
+provided it is mounted with the default block size of 1024 (as above).
+Please pass on any feedback on any of this stuff to the maintainer,
+whose address can be found in linux/MAINTAINERS.
+The IDE driver is modularized. The high level disk/CD-ROM/tape/floppy
+drivers can always be compiled as loadable modules, the chipset drivers
+can only be compiled into the kernel, and the core code (ide.c) can be
+compiled as a loadable module provided no chipset support is needed.
+When using ide.c as a module in combination with kmod, add:
+ alias block-major-3 ide-probe
+to a configuration file in /etc/modprobe.d/.
+When ide.c is used as a module, you can pass command line parameters to the
+driver using the "options=" keyword to insmod, while replacing any ',' with
+Summary of ide driver parameters for kernel command line
+For legacy IDE VLB host drivers (ali14xx/dtc2278/ht6560b/qd65xx/umc8672)
+you need to explicitly enable probing by using "probe" kernel parameter,
+i.e. to enable probing for ALI M14xx chipsets (ali14xx host driver) use:
+* "ali14xx.probe" boot option when ali14xx driver is built-in the kernel
+* "probe" module parameter when ali14xx driver is compiled as module
+ ("modprobe ali14xx probe")
+Also for legacy CMD640 host driver (cmd640) you need to use "probe_vlb"
+kernel paremeter to enable probing for VLB version of the chipset (PCI ones
+are detected automatically).
+You also need to use "probe" kernel parameter for ide-4drives driver
+(support for IDE generic chipset with four drives on one port).
+To enable support for IDE doublers on Amiga use "doubler" kernel parameter
+for gayle host driver (i.e. "gayle.doubler" if the driver is built-in).
+To force ignoring cable detection (this should be needed only if you're using
+short 40-wires cable which cannot be automatically detected - if this is not
+a case please report it as a bug instead) use "ignore_cable" kernel parameter:
+* "ide_core.ignore_cable=[interface_number]" boot option if IDE is built-in
+ (i.e. "ide_core.ignore_cable=1" to force ignoring cable for "ide1")
+* "ignore_cable=[interface_number]" module parameter (for ide_core module)
+ if IDE is compiled as module
+Other kernel parameters for ide_core are:
+* "nodma=[interface_number.device_number]" to disallow DMA for a device
+* "noflush=[interface_number.device_number]" to disable flush requests
+* "nohpa=[interface_number.device_number]" to disable Host Protected Area
+* "noprobe=[interface_number.device_number]" to skip probing
+* "nowerr=[interface_number.device_number]" to ignore the WRERR_STAT bit
+* "cdrom=[interface_number.device_number]" to force device as a CD-ROM
+* "chs=[interface_number.device_number]" to force device as a disk (using CHS)
+IDE = Integrated Drive Electronics, meaning that each drive has a built-in
+controller, which is why an "IDE interface card" is not a "controller card".
+ATA = AT (the old IBM 286 computer) Attachment Interface, a draft American
+National Standard for connecting hard drives to PCs. This is the official
+name for "IDE".
+The latest standards define some enhancements, known as the ATA-6 spec,
+which grew out of vendor-specific "Enhanced IDE" (EIDE) implementations.
+ATAPI = ATA Packet Interface, a new protocol for controlling the drives,
+similar to SCSI protocols, created at the same time as the ATA2 standard.
+ATAPI is currently used for controlling CDROM, TAPE and FLOPPY (ZIP or
+LS120/240) devices, removable R/W cartridges, and for high capacity hard disk
+Wed Apr 17 22:52:44 CEST 2002 edited by Marcin Dalecki, the current
+Wed Aug 20 22:31:29 CEST 2003 updated ide boot options to current ide.c
+comments at 2.6.0-test4 time. Maciej Soltysiak <firstname.lastname@example.org>
diff --git a/Documentation/ide/warm-plug-howto.txt b/Documentation/ide/warm-plug-howto.txt
new file mode 100644
@@ -0,0 +1,18 @@
+IDE warm-plug HOWTO
+To warm-plug devices on a port 'idex':
+# echo -n "1" > /sys/class/ide_port/idex/delete_devices
+unplug old device(s) and plug new device(s)
+# echo -n "1" > /sys/class/ide_port/idex/scan
+NOTE: please make sure that partitions are unmounted and that there are
+no other active references to devices before doing "delete_devices" step,
+also do not attempt "scan" step on devices currently in use -- otherwise
+results may be unpredictable and lead to data loss if you're unlucky