Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
new file mode 100644
index 0000000..33a020f
--- /dev/null
+++ b/drivers/ide/ide-cd.c
@@ -0,0 +1,3524 @@
+/*
+ * linux/drivers/ide/ide-cd.c
+ *
+ * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de>
+ *
+ * May be copied or modified under the terms of the GNU General Public
+ * License. See linux/COPYING for more information.
+ *
+ * ATAPI CD-ROM driver. To be used with ide.c.
+ * See Documentation/cdrom/ide-cd for usage information.
+ *
+ * Suggestions are welcome. Patches that work are more welcome though. ;-)
+ * For those wishing to work on this driver, please be sure you download
+ * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI
+ * (SFF-8020i rev 2.6) standards. These documents can be obtained by
+ * anonymous ftp from:
+ * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps
+ * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf
+ *
+ * Drives that deviate from these standards will be accommodated as much
+ * as possible via compile time or command-line options. Since I only have
+ * a few drives, you generally need to send me patches...
+ *
+ * ----------------------------------
+ * TO DO LIST:
+ * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on
+ * boot
+ *
+ * ----------------------------------
+ * 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 <cwsaw@pts7.pts.mot.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 <srh@gpt.co.uk> 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 <dietze@aix520.informatik.uni-leipzig.de>).
+ * 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 <heiko@colossus.escape.de>
+ * to remove redundant verify_area calls.
+ * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches
+ * from Gerhard Zuber <zuber@berlin.snafu.de>.
+ * 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 <hennus@sky.ow.nl>.)
+ * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers
+ * from Ben Galliart <bgallia@luc.edu> with
+ * special help from Jeff Lightfoot
+ * <jeffml@pobox.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 <andersee@debian.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 <gadio@netvision.net.il>
+ * 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 (xmakarov@sun.felk.cvut.cz)
+ *
+ * 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
+ * <jelle@scintilla.utwente.nl>, a patch for 2.0.33
+ * by Toni Giorgino <toni@pcape2.pi.infn.it>, 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 mechine endianess,
+ * patch thanks to "Eddie C. Dost" <ecd@skynet.be>
+ *
+ * 4.50 Oct 19, 1998 -- New maintainers!
+ * Jens Axboe <axboe@image.dk>
+ * Chris Zwilling <chris@cloudnet.com>
+ *
+ * 4.51 Dec 23, 1998 -- Jens Axboe <axboe@image.dk>
+ * - ide_cdrom_reset enabled since the ide subsystem
+ * handles resets fine now. <axboe@image.dk>
+ * - Transfer size fix for Samsung CD-ROMs, thanks to
+ * "Ville Hallik" <ville.hallik@mail.ee>.
+ * - other minor stuff.
+ *
+ * 4.52 Jan 19, 1999 -- Jens Axboe <axboe@image.dk>
+ * - 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 <heiko@colossus.escape.de> supplied
+ * some fixes for CDI.
+ * - CD-ROM leaving door locked fix from Andries
+ * Brouwer <Andries.Brouwer@cwi.nl>
+ * - Erik Andersen <andersen@xmission.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 <johnsom@orst.edu>
+ * 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 <der.eremit@email.de>
+ *
+ *************************************************************************/
+
+#define IDECD_VERSION "4.61"
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/cdrom.h>
+#include <linux/ide.h>
+#include <linux/completion.h>
+
+#include <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include "ide-cd.h"
+
+static DECLARE_MUTEX(idecd_ref_sem);
+
+#define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref)
+
+#define ide_cd_g(disk) \
+ container_of((disk)->private_data, struct cdrom_info, driver)
+
+static struct cdrom_info *ide_cd_get(struct gendisk *disk)
+{
+ struct cdrom_info *cd = NULL;
+
+ down(&idecd_ref_sem);
+ cd = ide_cd_g(disk);
+ if (cd)
+ kref_get(&cd->kref);
+ up(&idecd_ref_sem);
+ return cd;
+}
+
+static void ide_cd_release(struct kref *);
+
+static void ide_cd_put(struct cdrom_info *cd)
+{
+ down(&idecd_ref_sem);
+ kref_put(&cd->kref, ide_cd_release);
+ up(&idecd_ref_sem);
+}
+
+/****************************************************************************
+ * Generic packet command support and error handling routines.
+ */
+
+/* Mark that we've seen a media change, and invalidate our internal
+ buffers. */
+static void cdrom_saw_media_change (ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ CDROM_STATE_FLAGS (drive)->media_changed = 1;
+ CDROM_STATE_FLAGS (drive)->toc_valid = 0;
+ info->nsectors_buffered = 0;
+}
+
+static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
+ struct request_sense *sense)
+{
+ int log = 0;
+
+ if (!sense || !rq || (rq->flags & REQ_QUIET))
+ return 0;
+
+ switch (sense->sense_key) {
+ case NO_SENSE: case RECOVERED_ERROR:
+ break;
+ case NOT_READY:
+ /*
+ * don't care about tray state messages for
+ * e.g. capacity commands or in-progress or
+ * becoming ready
+ */
+ if (sense->asc == 0x3a || sense->asc == 0x04)
+ break;
+ log = 1;
+ break;
+ case ILLEGAL_REQUEST:
+ /*
+ * don't log START_STOP unit with LoEj set, since
+ * we cannot reliably check if drive can auto-close
+ */
+ if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24)
+ log = 0;
+ break;
+ case UNIT_ATTENTION:
+ /*
+ * Make good and sure we've seen this potential media
+ * change. Some drives (i.e. Creative) fail to present
+ * the correct sense key in the error register.
+ */
+ cdrom_saw_media_change(drive);
+ break;
+ default:
+ log = 1;
+ break;
+ }
+ return log;
+}
+
+static
+void cdrom_analyze_sense_data(ide_drive_t *drive,
+ struct request *failed_command,
+ struct request_sense *sense)
+{
+ if (!cdrom_log_sense(drive, failed_command, sense))
+ return;
+
+ /*
+ * If a read toc is executed for a CD-R or CD-RW medium where
+ * the first toc has not been recorded yet, it will fail with
+ * 05/24/00 (which is a confusing error)
+ */
+ if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
+ if (sense->sense_key == 0x05 && sense->asc == 0x24)
+ return;
+
+#if VERBOSE_IDE_CD_ERRORS
+ {
+ int i;
+ const char *s;
+ char buf[80];
+
+ printk ("ATAPI device %s:\n", drive->name);
+ if (sense->error_code==0x70)
+ printk(" Error: ");
+ else if (sense->error_code==0x71)
+ printk(" Deferred Error: ");
+ else if (sense->error_code == 0x7f)
+ printk(" Vendor-specific Error: ");
+ else
+ printk(" Unknown Error Type: ");
+
+ if (sense->sense_key < ARY_LEN(sense_key_texts))
+ s = sense_key_texts[sense->sense_key];
+ else
+ s = "bad sense key!";
+
+ printk("%s -- (Sense key=0x%02x)\n", s, sense->sense_key);
+
+ if (sense->asc == 0x40) {
+ sprintf(buf, "Diagnostic failure on component 0x%02x",
+ sense->ascq);
+ s = buf;
+ } else {
+ int lo = 0, mid, hi = ARY_LEN(sense_data_texts);
+ unsigned long key = (sense->sense_key << 16);
+ key |= (sense->asc << 8);
+ if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd))
+ key |= sense->ascq;
+ s = NULL;
+
+ while (hi > lo) {
+ mid = (lo + hi) / 2;
+ if (sense_data_texts[mid].asc_ascq == key ||
+ sense_data_texts[mid].asc_ascq == (0xff0000|key)) {
+ s = sense_data_texts[mid].text;
+ break;
+ }
+ else if (sense_data_texts[mid].asc_ascq > key)
+ hi = mid;
+ else
+ lo = mid+1;
+ }
+ }
+
+ if (s == NULL) {
+ if (sense->asc > 0x80)
+ s = "(vendor-specific error)";
+ else
+ s = "(reserved error code)";
+ }
+
+ printk(KERN_ERR " %s -- (asc=0x%02x, ascq=0x%02x)\n",
+ s, sense->asc, sense->ascq);
+
+ if (failed_command != NULL) {
+
+ int lo=0, mid, hi= ARY_LEN (packet_command_texts);
+ s = NULL;
+
+ while (hi > lo) {
+ mid = (lo + hi) / 2;
+ if (packet_command_texts[mid].packet_command ==
+ failed_command->cmd[0]) {
+ s = packet_command_texts[mid].text;
+ break;
+ }
+ if (packet_command_texts[mid].packet_command >
+ failed_command->cmd[0])
+ hi = mid;
+ else
+ lo = mid+1;
+ }
+
+ printk (KERN_ERR " The failed \"%s\" packet command was: \n \"", s);
+ for (i=0; i<sizeof (failed_command->cmd); i++)
+ printk ("%02x ", failed_command->cmd[i]);
+ printk ("\"\n");
+ }
+
+ /* The SKSV bit specifies validity of the sense_key_specific
+ * in the next two commands. It is bit 7 of the first byte.
+ * In the case of NOT_READY, if SKSV is set the drive can
+ * give us nice ETA readings.
+ */
+ if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) {
+ int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100;
+ printk(KERN_ERR " Command is %02d%% complete\n", progress / 0xffff);
+
+ }
+
+ if (sense->sense_key == ILLEGAL_REQUEST &&
+ (sense->sks[0] & 0x80) != 0) {
+ printk(KERN_ERR " Error in %s byte %d",
+ (sense->sks[0] & 0x40) != 0 ?
+ "command packet" : "command data",
+ (sense->sks[1] << 8) + sense->sks[2]);
+
+ if ((sense->sks[0] & 0x40) != 0)
+ printk (" bit %d", sense->sks[0] & 0x07);
+
+ printk ("\n");
+ }
+ }
+
+#else /* not VERBOSE_IDE_CD_ERRORS */
+
+ /* Suppress printing unit attention and `in progress of becoming ready'
+ errors when we're not being verbose. */
+
+ if (sense->sense_key == UNIT_ATTENTION ||
+ (sense->sense_key == NOT_READY && (sense->asc == 4 ||
+ sense->asc == 0x3a)))
+ return;
+
+ printk(KERN_ERR "%s: error code: 0x%02x sense_key: 0x%02x asc: 0x%02x ascq: 0x%02x\n",
+ drive->name,
+ sense->error_code, sense->sense_key,
+ sense->asc, sense->ascq);
+#endif /* not VERBOSE_IDE_CD_ERRORS */
+}
+
+/*
+ * Initialize a ide-cd packet command request
+ */
+static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq)
+{
+ struct cdrom_info *cd = drive->driver_data;
+
+ ide_init_drive_cmd(rq);
+ rq->flags = REQ_PC;
+ rq->rq_disk = cd->disk;
+}
+
+static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense,
+ struct request *failed_command)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct request *rq = &info->request_sense_request;
+
+ if (sense == NULL)
+ sense = &info->sense_data;
+
+ /* stuff the sense request in front of our current request */
+ cdrom_prepare_request(drive, rq);
+
+ rq->data = sense;
+ rq->cmd[0] = GPCMD_REQUEST_SENSE;
+ rq->cmd[4] = rq->data_len = 18;
+
+ rq->flags = REQ_SENSE;
+
+ /* NOTE! Save the failed command in "rq->buffer" */
+ rq->buffer = (void *) failed_command;
+
+ (void) ide_do_drive_cmd(drive, rq, ide_preempt);
+}
+
+static void cdrom_end_request (ide_drive_t *drive, int uptodate)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+ int nsectors = rq->hard_cur_sectors;
+
+ if ((rq->flags & REQ_SENSE) && uptodate) {
+ /*
+ * For REQ_SENSE, "rq->buffer" points to the original failed
+ * request
+ */
+ struct request *failed = (struct request *) rq->buffer;
+ struct cdrom_info *info = drive->driver_data;
+ void *sense = &info->sense_data;
+ unsigned long flags;
+
+ if (failed) {
+ if (failed->sense) {
+ sense = failed->sense;
+ failed->sense_len = rq->sense_len;
+ }
+
+ /*
+ * now end failed request
+ */
+ spin_lock_irqsave(&ide_lock, flags);
+ end_that_request_chunk(failed, 0, failed->data_len);
+ end_that_request_last(failed);
+ spin_unlock_irqrestore(&ide_lock, flags);
+ }
+
+ cdrom_analyze_sense_data(drive, failed, sense);
+ }
+
+ if (!rq->current_nr_sectors && blk_fs_request(rq))
+ uptodate = 1;
+ /* make sure it's fully ended */
+ if (blk_pc_request(rq))
+ nsectors = (rq->data_len + 511) >> 9;
+ if (!nsectors)
+ nsectors = 1;
+
+ ide_end_request(drive, uptodate, nsectors);
+}
+
+/* Returns 0 if the request should be continued.
+ Returns 1 if the request was ended. */
+static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+ int stat, err, sense_key;
+
+ /* Check for errors. */
+ stat = HWIF(drive)->INB(IDE_STATUS_REG);
+ if (stat_ret)
+ *stat_ret = stat;
+
+ if (OK_STAT(stat, good_stat, BAD_R_STAT))
+ return 0;
+
+ /* Get the IDE error register. */
+ err = HWIF(drive)->INB(IDE_ERROR_REG);
+ sense_key = err >> 4;
+
+ if (rq == NULL) {
+ printk("%s: missing rq in cdrom_decode_status\n", drive->name);
+ return 1;
+ }
+
+ if (rq->flags & REQ_SENSE) {
+ /* We got an error trying to get sense info
+ from the drive (probably while trying
+ to recover from a former error). Just give up. */
+
+ rq->flags |= REQ_FAILED;
+ cdrom_end_request(drive, 0);
+ ide_error(drive, "request sense failure", stat);
+ return 1;
+
+ } else if (rq->flags & (REQ_PC | REQ_BLOCK_PC)) {
+ /* All other functions, except for READ. */
+ unsigned long flags;
+
+ /*
+ * if we have an error, pass back CHECK_CONDITION as the
+ * scsi status byte
+ */
+ if ((rq->flags & REQ_BLOCK_PC) && !rq->errors)
+ rq->errors = SAM_STAT_CHECK_CONDITION;
+
+ /* Check for tray open. */
+ if (sense_key == NOT_READY) {
+ cdrom_saw_media_change (drive);
+ } else if (sense_key == UNIT_ATTENTION) {
+ /* Check for media change. */
+ cdrom_saw_media_change (drive);
+ /*printk("%s: media changed\n",drive->name);*/
+ return 0;
+ } else if (!(rq->flags & REQ_QUIET)) {
+ /* Otherwise, print an error. */
+ ide_dump_status(drive, "packet command error", stat);
+ }
+
+ rq->flags |= REQ_FAILED;
+
+ /*
+ * instead of playing games with moving completions around,
+ * remove failed request completely and end it when the
+ * request sense has completed
+ */
+ if (stat & ERR_STAT) {
+ spin_lock_irqsave(&ide_lock, flags);
+ blkdev_dequeue_request(rq);
+ HWGROUP(drive)->rq = NULL;
+ spin_unlock_irqrestore(&ide_lock, flags);
+
+ cdrom_queue_request_sense(drive, rq->sense, rq);
+ } else
+ cdrom_end_request(drive, 0);
+
+ } else if (blk_fs_request(rq)) {
+ int do_end_request = 0;
+
+ /* Handle errors from READ and WRITE requests. */
+
+ if (blk_noretry_request(rq))
+ do_end_request = 1;
+
+ if (sense_key == NOT_READY) {
+ /* Tray open. */
+ if (rq_data_dir(rq) == READ) {
+ cdrom_saw_media_change (drive);
+
+ /* Fail the request. */
+ printk ("%s: tray open\n", drive->name);
+ do_end_request = 1;
+ } else {
+ struct cdrom_info *info = drive->driver_data;
+
+ /* allow the drive 5 seconds to recover, some
+ * devices will return this error while flushing
+ * data from cache */
+ if (!rq->errors)
+ info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY;
+ rq->errors = 1;
+ if (time_after(jiffies, info->write_timeout))
+ do_end_request = 1;
+ else {
+ unsigned long flags;
+
+ /*
+ * take a breather relying on the
+ * unplug timer to kick us again
+ */
+ spin_lock_irqsave(&ide_lock, flags);
+ blk_plug_device(drive->queue);
+ spin_unlock_irqrestore(&ide_lock,flags);
+ return 1;
+ }
+ }
+ } else if (sense_key == UNIT_ATTENTION) {
+ /* Media change. */
+ cdrom_saw_media_change (drive);
+
+ /* Arrange to retry the request.
+ But be sure to give up if we've retried
+ too many times. */
+ if (++rq->errors > ERROR_MAX)
+ do_end_request = 1;
+ } else if (sense_key == ILLEGAL_REQUEST ||
+ sense_key == DATA_PROTECT) {
+ /* No point in retrying after an illegal
+ request or data protect error.*/
+ ide_dump_status (drive, "command error", stat);
+ do_end_request = 1;
+ } else if (sense_key == MEDIUM_ERROR) {
+ /* No point in re-trying a zillion times on a bad
+ * sector... If we got here the error is not correctable */
+ ide_dump_status (drive, "media error (bad sector)", stat);
+ do_end_request = 1;
+ } else if (sense_key == BLANK_CHECK) {
+ /* Disk appears blank ?? */
+ ide_dump_status (drive, "media error (blank)", stat);
+ do_end_request = 1;
+ } else if ((err & ~ABRT_ERR) != 0) {
+ /* Go to the default handler
+ for other errors. */
+ ide_error(drive, "cdrom_decode_status", stat);
+ return 1;
+ } else if ((++rq->errors > ERROR_MAX)) {
+ /* We've racked up too many retries. Abort. */
+ do_end_request = 1;
+ }
+
+ if (do_end_request)
+ cdrom_end_request(drive, 0);
+
+ /* If we got a CHECK_CONDITION status,
+ queue a request sense command. */
+ if ((stat & ERR_STAT) != 0)
+ cdrom_queue_request_sense(drive, NULL, NULL);
+ } else {
+ blk_dump_rq_flags(rq, "ide-cd: bad rq");
+ cdrom_end_request(drive, 0);
+ }
+
+ /* Retry, or handle the next request. */
+ return 1;
+}
+
+static int cdrom_timer_expiry(ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned long wait = 0;
+
+ /*
+ * Some commands are *slow* and normally take a long time to
+ * complete. Usually we can use the ATAPI "disconnect" to bypass
+ * this, but not all commands/drives support that. Let
+ * ide_timer_expiry keep polling us for these.
+ */
+ switch (rq->cmd[0]) {
+ case GPCMD_BLANK:
+ case GPCMD_FORMAT_UNIT:
+ case GPCMD_RESERVE_RZONE_TRACK:
+ case GPCMD_CLOSE_TRACK:
+ case GPCMD_FLUSH_CACHE:
+ wait = ATAPI_WAIT_PC;
+ break;
+ default:
+ if (!(rq->flags & REQ_QUIET))
+ printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]);
+ wait = 0;
+ break;
+ }
+ return wait;
+}
+
+/* Set up the device registers for transferring a packet command on DEV,
+ expecting to later transfer XFERLEN bytes. HANDLER is the routine
+ which actually transfers the command to the drive. If this is a
+ drq_interrupt device, this routine will arrange for HANDLER to be
+ called when the interrupt from the drive arrives. Otherwise, HANDLER
+ will be called immediately after the drive is prepared for the transfer. */
+
+static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive,
+ int xferlen,
+ ide_handler_t *handler)
+{
+ ide_startstop_t startstop;
+ struct cdrom_info *info = drive->driver_data;
+ ide_hwif_t *hwif = drive->hwif;
+
+ /* Wait for the controller to be idle. */
+ if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
+ return startstop;
+
+ if (info->dma)
+ info->dma = !hwif->dma_setup(drive);
+
+ /* Set up the controller registers. */
+ /* FIXME: for Virtual DMA we must check harder */
+ HWIF(drive)->OUTB(info->dma, IDE_FEATURE_REG);
+ HWIF(drive)->OUTB(0, IDE_IREASON_REG);
+ HWIF(drive)->OUTB(0, IDE_SECTOR_REG);
+
+ HWIF(drive)->OUTB(xferlen & 0xff, IDE_BCOUNTL_REG);
+ HWIF(drive)->OUTB(xferlen >> 8 , IDE_BCOUNTH_REG);
+ if (IDE_CONTROL_REG)
+ HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
+
+ if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) {
+ /* packet command */
+ ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry);
+ return ide_started;
+ } else {
+ unsigned long flags;
+
+ /* packet command */
+ spin_lock_irqsave(&ide_lock, flags);
+ hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG);
+ ndelay(400);
+ spin_unlock_irqrestore(&ide_lock, flags);
+
+ return (*handler) (drive);
+ }
+}
+
+/* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN.
+ The device registers must have already been prepared
+ by cdrom_start_packet_command.
+ HANDLER is the interrupt handler to call when the command completes
+ or there's data ready. */
+/*
+ * changed 5 parameters to 3 for dvd-ram
+ * struct packet_command *pc; now packet_command_t *pc;
+ */
+#define ATAPI_MIN_CDB_BYTES 12
+static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
+ struct request *rq,
+ ide_handler_t *handler)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ int cmd_len;
+ struct cdrom_info *info = drive->driver_data;
+ ide_startstop_t startstop;
+
+ if (CDROM_CONFIG_FLAGS(drive)->drq_interrupt) {
+ /* Here we should have been called after receiving an interrupt
+ from the device. DRQ should how be set. */
+
+ /* Check for errors. */
+ if (cdrom_decode_status(drive, DRQ_STAT, NULL))
+ return ide_stopped;
+ } else {
+ /* Otherwise, we must wait for DRQ to get set. */
+ if (ide_wait_stat(&startstop, drive, DRQ_STAT,
+ BUSY_STAT, WAIT_READY))
+ return startstop;
+ }
+
+ /* Arm the interrupt handler. */
+ ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry);
+
+ /* ATAPI commands get padded out to 12 bytes minimum */
+ cmd_len = COMMAND_SIZE(rq->cmd[0]);
+ if (cmd_len < ATAPI_MIN_CDB_BYTES)
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ /* Send the command to the device. */
+ HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len);
+
+ /* Start the DMA if need be */
+ if (info->dma)
+ hwif->dma_start(drive);
+
+ return ide_started;
+}
+
+/****************************************************************************
+ * Block read functions.
+ */
+
+/*
+ * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector
+ * buffer. Once the first sector is added, any subsequent sectors are
+ * assumed to be continuous (until the buffer is cleared). For the first
+ * sector added, SECTOR is its sector number. (SECTOR is then ignored until
+ * the buffer is cleared.)
+ */
+static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector,
+ int sectors_to_transfer)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ /* Number of sectors to read into the buffer. */
+ int sectors_to_buffer = min_t(int, sectors_to_transfer,
+ (SECTOR_BUFFER_SIZE >> SECTOR_BITS) -
+ info->nsectors_buffered);
+
+ char *dest;
+
+ /* If we couldn't get a buffer, don't try to buffer anything... */
+ if (info->buffer == NULL)
+ sectors_to_buffer = 0;
+
+ /* If this is the first sector in the buffer, remember its number. */
+ if (info->nsectors_buffered == 0)
+ info->sector_buffered = sector;
+
+ /* Read the data into the buffer. */
+ dest = info->buffer + info->nsectors_buffered * SECTOR_SIZE;
+ while (sectors_to_buffer > 0) {
+ HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE);
+ --sectors_to_buffer;
+ --sectors_to_transfer;
+ ++info->nsectors_buffered;
+ dest += SECTOR_SIZE;
+ }
+
+ /* Throw away any remaining data. */
+ while (sectors_to_transfer > 0) {
+ static char dum[SECTOR_SIZE];
+ HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
+ --sectors_to_transfer;
+ }
+}
+
+/*
+ * Check the contents of the interrupt reason register from the cdrom
+ * and attempt to recover if there are problems. Returns 0 if everything's
+ * ok; nonzero if the request has been terminated.
+ */
+static inline
+int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason)
+{
+ if (ireason == 2)
+ return 0;
+ else if (ireason == 0) {
+ /* Whoops... The drive is expecting to receive data from us! */
+ printk(KERN_ERR "%s: read_intr: Drive wants to transfer data the "
+ "wrong way!\n", drive->name);
+
+ /* Throw some data at the drive so it doesn't hang
+ and quit this request. */
+ while (len > 0) {
+ int dum = 0;
+ HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof (dum));
+ len -= sizeof (dum);
+ }
+ } else if (ireason == 1) {
+ /* Some drives (ASUS) seem to tell us that status
+ * info is available. just get it and ignore.
+ */
+ (void) HWIF(drive)->INB(IDE_STATUS_REG);
+ return 0;
+ } else {
+ /* Drive wants a command packet, or invalid ireason... */
+ printk(KERN_ERR "%s: read_intr: bad interrupt reason %x\n", drive->name,
+ ireason);
+ }
+
+ cdrom_end_request(drive, 0);
+ return -1;
+}
+
+/*
+ * Interrupt routine. Called when a read request has completed.
+ */
+static ide_startstop_t cdrom_read_intr (ide_drive_t *drive)
+{
+ int stat;
+ int ireason, len, sectors_to_transfer, nskip;
+ struct cdrom_info *info = drive->driver_data;
+ u8 lowcyl = 0, highcyl = 0;
+ int dma = info->dma, dma_error = 0;
+
+ struct request *rq = HWGROUP(drive)->rq;
+
+ /*
+ * handle dma case
+ */
+ if (dma) {
+ info->dma = 0;
+ if ((dma_error = HWIF(drive)->ide_dma_end(drive)))
+ __ide_dma_off(drive);
+ }
+
+ if (cdrom_decode_status(drive, 0, &stat))
+ return ide_stopped;
+
+ if (dma) {
+ if (!dma_error) {
+ ide_end_request(drive, 1, rq->nr_sectors);
+ return ide_stopped;
+ } else
+ return ide_error(drive, "dma error", stat);
+ }
+
+ /* Read the interrupt reason and the transfer length. */
+ ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
+ lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
+ highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+
+ len = lowcyl + (256 * highcyl);
+
+ /* If DRQ is clear, the command has completed. */
+ if ((stat & DRQ_STAT) == 0) {
+ /* If we're not done filling the current buffer, complain.
+ Otherwise, complete the command normally. */
+ if (rq->current_nr_sectors > 0) {
+ printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n",
+ drive->name, rq->current_nr_sectors);
+ rq->flags |= REQ_FAILED;
+ cdrom_end_request(drive, 0);
+ } else
+ cdrom_end_request(drive, 1);
+ return ide_stopped;
+ }
+
+ /* Check that the drive is expecting to do the same thing we are. */
+ if (cdrom_read_check_ireason (drive, len, ireason))
+ return ide_stopped;
+
+ /* Assume that the drive will always provide data in multiples
+ of at least SECTOR_SIZE, as it gets hairy to keep track
+ of the transfers otherwise. */
+ if ((len % SECTOR_SIZE) != 0) {
+ printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n",
+ drive->name, len);
+ if (CDROM_CONFIG_FLAGS(drive)->limit_nframes)
+ printk (KERN_ERR " This drive is not supported by this version of the driver\n");
+ else {
+ printk (KERN_ERR " Trying to limit transfer sizes\n");
+ CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
+ }
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+
+ /* The number of sectors we need to read from the drive. */
+ sectors_to_transfer = len / SECTOR_SIZE;
+
+ /* First, figure out if we need to bit-bucket
+ any of the leading sectors. */
+ nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer);
+
+ while (nskip > 0) {
+ /* We need to throw away a sector. */
+ static char dum[SECTOR_SIZE];
+ HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
+
+ --rq->current_nr_sectors;
+ --nskip;
+ --sectors_to_transfer;
+ }
+
+ /* Now loop while we still have data to read from the drive. */
+ while (sectors_to_transfer > 0) {
+ int this_transfer;
+
+ /* If we've filled the present buffer but there's another
+ chained buffer after it, move on. */
+ if (rq->current_nr_sectors == 0 && rq->nr_sectors)
+ cdrom_end_request(drive, 1);
+
+ /* If the buffers are full, cache the rest of the data in our
+ internal buffer. */
+ if (rq->current_nr_sectors == 0) {
+ cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer);
+ sectors_to_transfer = 0;
+ } else {
+ /* Transfer data to the buffers.
+ Figure out how many sectors we can transfer
+ to the current buffer. */
+ this_transfer = min_t(int, sectors_to_transfer,
+ rq->current_nr_sectors);
+
+ /* Read this_transfer sectors
+ into the current buffer. */
+ while (this_transfer > 0) {
+ HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE);
+ rq->buffer += SECTOR_SIZE;
+ --rq->nr_sectors;
+ --rq->current_nr_sectors;
+ ++rq->sector;
+ --this_transfer;
+ --sectors_to_transfer;
+ }
+ }
+ }
+
+ /* Done moving data! Wait for another interrupt. */
+ ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL);
+ return ide_started;
+}
+
+/*
+ * Try to satisfy some of the current read request from our cached data.
+ * Returns nonzero if the request has been completed, zero otherwise.
+ */
+static int cdrom_read_from_buffer (ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned short sectors_per_frame;
+
+ sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+
+ /* Can't do anything if there's no buffer. */
+ if (info->buffer == NULL) return 0;
+
+ /* Loop while this request needs data and the next block is present
+ in our cache. */
+ while (rq->nr_sectors > 0 &&
+ rq->sector >= info->sector_buffered &&
+ rq->sector < info->sector_buffered + info->nsectors_buffered) {
+ if (rq->current_nr_sectors == 0)
+ cdrom_end_request(drive, 1);
+
+ memcpy (rq->buffer,
+ info->buffer +
+ (rq->sector - info->sector_buffered) * SECTOR_SIZE,
+ SECTOR_SIZE);
+ rq->buffer += SECTOR_SIZE;
+ --rq->current_nr_sectors;
+ --rq->nr_sectors;
+ ++rq->sector;
+ }
+
+ /* If we've satisfied the current request,
+ terminate it successfully. */
+ if (rq->nr_sectors == 0) {
+ cdrom_end_request(drive, 1);
+ return -1;
+ }
+
+ /* Move on to the next buffer if needed. */
+ if (rq->current_nr_sectors == 0)
+ cdrom_end_request(drive, 1);
+
+ /* If this condition does not hold, then the kluge i use to
+ represent the number of sectors to skip at the start of a transfer
+ will fail. I think that this will never happen, but let's be
+ paranoid and check. */
+ if (rq->current_nr_sectors < bio_cur_sectors(rq->bio) &&
+ (rq->sector & (sectors_per_frame - 1))) {
+ printk(KERN_ERR "%s: cdrom_read_from_buffer: buffer botch (%ld)\n",
+ drive->name, (long)rq->sector);
+ cdrom_end_request(drive, 0);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Routine to send a read packet command to the drive.
+ * This is usually called directly from cdrom_start_read.
+ * However, for drq_interrupt devices, it is called from an interrupt
+ * when the drive is ready to accept the command.
+ */
+static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned short sectors_per_frame;
+ int nskip;
+
+ sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+
+ /* If the requested sector doesn't start on a cdrom block boundary,
+ we must adjust the start of the transfer so that it does,
+ and remember to skip the first few sectors.
+ If the CURRENT_NR_SECTORS field is larger than the size
+ of the buffer, it will mean that we're to skip a number
+ of sectors equal to the amount by which CURRENT_NR_SECTORS
+ is larger than the buffer size. */
+ nskip = rq->sector & (sectors_per_frame - 1);
+ if (nskip > 0) {
+ /* Sanity check... */
+ if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) &&
+ (rq->sector & (sectors_per_frame - 1))) {
+ printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n",
+ drive->name, rq->current_nr_sectors);
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+ rq->current_nr_sectors += nskip;
+ }
+
+ /* Set up the command */
+ rq->timeout = ATAPI_WAIT_PC;
+
+ /* Send the command to the drive and return. */
+ return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr);
+}
+
+
+#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */
+#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */
+#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */
+
+static ide_startstop_t cdrom_seek_intr (ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+ int stat;
+ static int retry = 10;
+
+ if (cdrom_decode_status(drive, 0, &stat))
+ return ide_stopped;
+ CDROM_CONFIG_FLAGS(drive)->seeking = 1;
+
+ if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) {
+ if (--retry == 0) {
+ /*
+ * this condition is far too common, to bother
+ * users about it
+ */
+ /* printk("%s: disabled DSC seek overlap\n", drive->name);*/
+ drive->dsc_overlap = 0;
+ }
+ }
+ return ide_stopped;
+}
+
+static ide_startstop_t cdrom_start_seek_continuation (ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+ sector_t frame = rq->sector;
+
+ sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS);
+
+ memset(rq->cmd, 0, sizeof(rq->cmd));
+ rq->cmd[0] = GPCMD_SEEK;
+ put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
+
+ rq->timeout = ATAPI_WAIT_PC;
+ return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
+}
+
+static ide_startstop_t cdrom_start_seek (ide_drive_t *drive, unsigned int block)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ info->dma = 0;
+ info->cmd = 0;
+ info->start_seek = jiffies;
+ return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation);
+}
+
+/* Fix up a possibly partially-processed request so that we can
+ start it over entirely, or even put it back on the request queue. */
+static void restore_request (struct request *rq)
+{
+ if (rq->buffer != bio_data(rq->bio)) {
+ sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE;
+
+ rq->buffer = bio_data(rq->bio);
+ rq->nr_sectors += n;
+ rq->sector -= n;
+ }
+ rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio);
+ rq->hard_nr_sectors = rq->nr_sectors;
+ rq->hard_sector = rq->sector;
+ rq->q->prep_rq_fn(rq->q, rq);
+}
+
+/*
+ * Start a read request from the CD-ROM.
+ */
+static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned short sectors_per_frame;
+
+ sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+
+ /* We may be retrying this request after an error. Fix up
+ any weirdness which might be present in the request packet. */
+ restore_request(rq);
+
+ /* Satisfy whatever we can of this request from our cached sector. */
+ if (cdrom_read_from_buffer(drive))
+ return ide_stopped;
+
+ blk_attempt_remerge(drive->queue, rq);
+
+ /* Clear the local sector buffer. */
+ info->nsectors_buffered = 0;
+
+ /* use dma, if possible. */
+ info->dma = drive->using_dma;
+ if ((rq->sector & (sectors_per_frame - 1)) ||
+ (rq->nr_sectors & (sectors_per_frame - 1)))
+ info->dma = 0;
+
+ info->cmd = READ;
+
+ /* Start sending the read request to the drive. */
+ return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation);
+}
+
+/****************************************************************************
+ * Execute all other packet commands.
+ */
+
+/* Interrupt routine for packet command completion. */
+static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
+{
+ int ireason, len, thislen;
+ struct request *rq = HWGROUP(drive)->rq;
+ u8 lowcyl = 0, highcyl = 0;
+ int stat;
+
+ /* Check for errors. */
+ if (cdrom_decode_status(drive, 0, &stat))
+ return ide_stopped;
+
+ /* Read the interrupt reason and the transfer length. */
+ ireason = HWIF(drive)->INB(IDE_IREASON_REG);
+ lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
+ highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+
+ len = lowcyl + (256 * highcyl);
+
+ /* If DRQ is clear, the command has completed.
+ Complain if we still have data left to transfer. */
+ if ((stat & DRQ_STAT) == 0) {
+ /* Some of the trailing request sense fields are optional, and
+ some drives don't send them. Sigh. */
+ if (rq->cmd[0] == GPCMD_REQUEST_SENSE &&
+ rq->data_len > 0 &&
+ rq->data_len <= 5) {
+ while (rq->data_len > 0) {
+ *(unsigned char *)rq->data++ = 0;
+ --rq->data_len;
+ }
+ }
+
+ if (rq->data_len == 0)
+ cdrom_end_request(drive, 1);
+ else {
+ /* Comment this out, because this always happens
+ right after a reset occurs, and it is annoying to
+ always print expected stuff. */
+ /*
+ printk ("%s: cdrom_pc_intr: data underrun %d\n",
+ drive->name, pc->buflen);
+ */
+ rq->flags |= REQ_FAILED;
+ cdrom_end_request(drive, 0);
+ }
+ return ide_stopped;
+ }
+
+ /* Figure out how much data to transfer. */
+ thislen = rq->data_len;
+ if (thislen > len) thislen = len;
+
+ /* The drive wants to be written to. */
+ if ((ireason & 3) == 0) {
+ if (!rq->data) {
+ blk_dump_rq_flags(rq, "cdrom_pc_intr, write");
+ goto confused;
+ }
+ /* Transfer the data. */
+ HWIF(drive)->atapi_output_bytes(drive, rq->data, thislen);
+
+ /* If we haven't moved enough data to satisfy the drive,
+ add some padding. */
+ while (len > thislen) {
+ int dum = 0;
+ HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof(dum));
+ len -= sizeof(dum);
+ }
+
+ /* Keep count of how much data we've moved. */
+ rq->data += thislen;
+ rq->data_len -= thislen;
+ }
+
+ /* Same drill for reading. */
+ else if ((ireason & 3) == 2) {
+ if (!rq->data) {
+ blk_dump_rq_flags(rq, "cdrom_pc_intr, write");
+ goto confused;
+ }
+ /* Transfer the data. */
+ HWIF(drive)->atapi_input_bytes(drive, rq->data, thislen);
+
+ /* If we haven't moved enough data to satisfy the drive,
+ add some padding. */
+ while (len > thislen) {
+ int dum = 0;
+ HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum));
+ len -= sizeof(dum);
+ }
+
+ /* Keep count of how much data we've moved. */
+ rq->data += thislen;
+ rq->data_len -= thislen;
+
+ if (rq->flags & REQ_SENSE)
+ rq->sense_len += thislen;
+ } else {
+confused:
+ printk (KERN_ERR "%s: cdrom_pc_intr: The drive "
+ "appears confused (ireason = 0x%02x)\n",
+ drive->name, ireason);
+ rq->flags |= REQ_FAILED;
+ }
+
+ /* Now we wait for another interrupt. */
+ ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry);
+ return ide_started;
+}
+
+static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+
+ if (!rq->timeout)
+ rq->timeout = ATAPI_WAIT_PC;
+
+ /* Send the command to the drive and return. */
+ return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr);
+}
+
+
+static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive)
+{
+ int len;
+ struct request *rq = HWGROUP(drive)->rq;
+ struct cdrom_info *info = drive->driver_data;
+
+ info->dma = 0;
+ info->cmd = 0;
+ rq->flags &= ~REQ_FAILED;
+ len = rq->data_len;
+
+ /* Start sending the command to the drive. */
+ return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation);
+}
+
+
+static
+int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
+{
+ struct request_sense sense;
+ int retries = 10;
+ unsigned int flags = rq->flags;
+
+ if (rq->sense == NULL)
+ rq->sense = &sense;
+
+ /* Start of retry loop. */
+ do {
+ int error;
+ unsigned long time = jiffies;
+ rq->flags = flags;
+
+ error = ide_do_drive_cmd(drive, rq, ide_wait);
+ time = jiffies - time;
+
+ /* FIXME: we should probably abort/retry or something
+ * in case of failure */
+ if (rq->flags & REQ_FAILED) {
+ /* The request failed. Retry if it was due to a unit
+ attention status
+ (usually means media was changed). */
+ struct request_sense *reqbuf = rq->sense;
+
+ if (reqbuf->sense_key == UNIT_ATTENTION)
+ cdrom_saw_media_change(drive);
+ else if (reqbuf->sense_key == NOT_READY &&
+ reqbuf->asc == 4 && reqbuf->ascq != 4) {
+ /* The drive is in the process of loading
+ a disk. Retry, but wait a little to give
+ the drive time to complete the load. */
+ ssleep(2);
+ } else {
+ /* Otherwise, don't retry. */
+ retries = 0;
+ }
+ --retries;
+ }
+
+ /* End of retry loop. */
+ } while ((rq->flags & REQ_FAILED) && retries >= 0);
+
+ /* Return an error if the command failed. */
+ return (rq->flags & REQ_FAILED) ? -EIO : 0;
+}
+
+/*
+ * Write handling
+ */
+static inline int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason)
+{
+ /* Two notes about IDE interrupt reason here - 0 means that
+ * the drive wants to receive data from us, 2 means that
+ * the drive is expecting to transfer data to us.
+ */
+ if (ireason == 0)
+ return 0;
+ else if (ireason == 2) {
+ /* Whoops... The drive wants to send data. */
+ printk(KERN_ERR "%s: write_intr: wrong transfer direction!\n",
+ drive->name);
+
+ while (len > 0) {
+ int dum = 0;
+ HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum));
+ len -= sizeof(dum);
+ }
+ } else {
+ /* Drive wants a command packet, or invalid ireason... */
+ printk(KERN_ERR "%s: write_intr: bad interrupt reason %x\n",
+ drive->name, ireason);
+ }
+
+ cdrom_end_request(drive, 0);
+ return 1;
+}
+
+static void post_transform_command(struct request *req)
+{
+ u8 *c = req->cmd;
+ char *ibuf;
+
+ if (!blk_pc_request(req))
+ return;
+
+ if (req->bio)
+ ibuf = bio_data(req->bio);
+ else
+ ibuf = req->data;
+
+ if (!ibuf)
+ return;
+
+ /*
+ * set ansi-revision and response data as atapi
+ */
+ if (c[0] == GPCMD_INQUIRY) {
+ ibuf[2] |= 2;
+ ibuf[3] = (ibuf[3] & 0xf0) | 2;
+ }
+}
+
+typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
+
+/*
+ * best way to deal with dma that is not sector aligned right now... note
+ * that in this path we are not using ->data or ->buffer at all. this irs
+ * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the
+ * future.
+ */
+static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct request *rq = HWGROUP(drive)->rq;
+ int dma_error, dma, stat, ireason, len, thislen;
+ u8 lowcyl, highcyl;
+ xfer_func_t *xferfunc;
+ unsigned long flags;
+
+ /* Check for errors. */
+ dma_error = 0;
+ dma = info->dma;
+ if (dma) {
+ info->dma = 0;
+ dma_error = HWIF(drive)->ide_dma_end(drive);
+ }
+
+ if (cdrom_decode_status(drive, 0, &stat))
+ return ide_stopped;
+
+ /*
+ * using dma, transfer is complete now
+ */
+ if (dma) {
+ if (dma_error) {
+ printk(KERN_ERR "ide-cd: dma error\n");
+ __ide_dma_off(drive);
+ return ide_error(drive, "dma error", stat);
+ }
+
+ end_that_request_chunk(rq, 1, rq->data_len);
+ rq->data_len = 0;
+ goto end_request;
+ }
+
+ /*
+ * ok we fall to pio :/
+ */
+ ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3;
+ lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
+ highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+
+ len = lowcyl + (256 * highcyl);
+ thislen = rq->data_len;
+ if (thislen > len)
+ thislen = len;
+
+ /*
+ * If DRQ is clear, the command has completed.
+ */
+ if ((stat & DRQ_STAT) == 0)
+ goto end_request;
+
+ /*
+ * check which way to transfer data
+ */
+ if (rq_data_dir(rq) == WRITE) {
+ /*
+ * write to drive
+ */
+ if (cdrom_write_check_ireason(drive, len, ireason))
+ return ide_stopped;
+
+ xferfunc = HWIF(drive)->atapi_output_bytes;
+ } else {
+ /*
+ * read from drive
+ */
+ if (cdrom_read_check_ireason(drive, len, ireason))
+ return ide_stopped;
+
+ xferfunc = HWIF(drive)->atapi_input_bytes;
+ }
+
+ /*
+ * transfer data
+ */
+ while (thislen > 0) {
+ int blen = blen = rq->data_len;
+ char *ptr = rq->data;
+
+ /*
+ * bio backed?
+ */
+ if (rq->bio) {
+ ptr = bio_data(rq->bio);
+ blen = bio_iovec(rq->bio)->bv_len;
+ }
+
+ if (!ptr) {
+ printk(KERN_ERR "%s: confused, missing data\n", drive->name);
+ break;
+ }
+
+ if (blen > thislen)
+ blen = thislen;
+
+ xferfunc(drive, ptr, blen);
+
+ thislen -= blen;
+ len -= blen;
+ rq->data_len -= blen;
+
+ if (rq->bio)
+ end_that_request_chunk(rq, 1, blen);
+ else
+ rq->data += blen;
+ }
+
+ /*
+ * pad, if necessary
+ */
+ if (len > 0) {
+ while (len > 0) {
+ int pad = 0;
+
+ xferfunc(drive, &pad, sizeof(pad));
+ len -= sizeof(pad);
+ }
+ }
+
+ if (HWGROUP(drive)->handler != NULL)
+ BUG();
+
+ ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL);
+ return ide_started;
+
+end_request:
+ if (!rq->data_len)
+ post_transform_command(rq);
+
+ spin_lock_irqsave(&ide_lock, flags);
+ blkdev_dequeue_request(rq);
+ end_that_request_last(rq);
+ HWGROUP(drive)->rq = NULL;
+ spin_unlock_irqrestore(&ide_lock, flags);
+ return ide_stopped;
+}
+
+static ide_startstop_t cdrom_write_intr(ide_drive_t *drive)
+{
+ int stat, ireason, len, sectors_to_transfer, uptodate;
+ struct cdrom_info *info = drive->driver_data;
+ int dma_error = 0, dma = info->dma;
+ u8 lowcyl = 0, highcyl = 0;
+
+ struct request *rq = HWGROUP(drive)->rq;
+
+ /* Check for errors. */
+ if (dma) {
+ info->dma = 0;
+ if ((dma_error = HWIF(drive)->ide_dma_end(drive))) {
+ printk(KERN_ERR "ide-cd: write dma error\n");
+ __ide_dma_off(drive);
+ }
+ }
+
+ if (cdrom_decode_status(drive, 0, &stat))
+ return ide_stopped;
+
+ /*
+ * using dma, transfer is complete now
+ */
+ if (dma) {
+ if (dma_error)
+ return ide_error(drive, "dma error", stat);
+
+ ide_end_request(drive, 1, rq->nr_sectors);
+ return ide_stopped;
+ }
+
+ /* Read the interrupt reason and the transfer length. */
+ ireason = HWIF(drive)->INB(IDE_IREASON_REG);
+ lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG);
+ highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG);
+
+ len = lowcyl + (256 * highcyl);
+
+ /* If DRQ is clear, the command has completed. */
+ if ((stat & DRQ_STAT) == 0) {
+ /* If we're not done writing, complain.
+ * Otherwise, complete the command normally.
+ */
+ uptodate = 1;
+ if (rq->current_nr_sectors > 0) {
+ printk(KERN_ERR "%s: write_intr: data underrun (%d blocks)\n",
+ drive->name, rq->current_nr_sectors);
+ uptodate = 0;
+ }
+ cdrom_end_request(drive, uptodate);
+ return ide_stopped;
+ }
+
+ /* Check that the drive is expecting to do the same thing we are. */
+ if (cdrom_write_check_ireason(drive, len, ireason))
+ return ide_stopped;
+
+ sectors_to_transfer = len / SECTOR_SIZE;
+
+ /*
+ * now loop and write out the data
+ */
+ while (sectors_to_transfer > 0) {
+ int this_transfer;
+
+ if (!rq->current_nr_sectors) {
+ printk(KERN_ERR "ide-cd: write_intr: oops\n");
+ break;
+ }
+
+ /*
+ * Figure out how many sectors we can transfer
+ */
+ this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors);
+
+ while (this_transfer > 0) {
+ HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
+ rq->buffer += SECTOR_SIZE;
+ --rq->nr_sectors;
+ --rq->current_nr_sectors;
+ ++rq->sector;
+ --this_transfer;
+ --sectors_to_transfer;
+ }
+
+ /*
+ * current buffer complete, move on
+ */
+ if (rq->current_nr_sectors == 0 && rq->nr_sectors)
+ cdrom_end_request(drive, 1);
+ }
+
+ /* re-arm handler */
+ ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL);
+ return ide_started;
+}
+
+static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+
+#if 0 /* the immediate bit */
+ rq->cmd[1] = 1 << 3;
+#endif
+ rq->timeout = ATAPI_WAIT_PC;
+
+ return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
+}
+
+static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct gendisk *g = info->disk;
+ unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS;
+
+ /*
+ * writes *must* be hardware frame aligned
+ */
+ if ((rq->nr_sectors & (sectors_per_frame - 1)) ||
+ (rq->sector & (sectors_per_frame - 1))) {
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+
+ /*
+ * disk has become write protected
+ */
+ if (g->policy) {
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+ }
+
+ /*
+ * for dvd-ram and such media, it's a really big deal to get
+ * big writes all the time. so scour the queue and attempt to
+ * remerge requests, often the plugging will not have had time
+ * to do this properly
+ */
+ blk_attempt_remerge(drive->queue, rq);
+
+ info->nsectors_buffered = 0;
+
+ /* use dma, if possible. we don't need to check more, since we
+ * know that the transfer is always (at least!) frame aligned */
+ info->dma = drive->using_dma ? 1 : 0;
+ info->cmd = WRITE;
+
+ info->devinfo.media_written = 1;
+
+ /* Start sending the write request to the drive. */
+ return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
+}
+
+static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive)
+{
+ struct request *rq = HWGROUP(drive)->rq;
+
+ if (!rq->timeout)
+ rq->timeout = ATAPI_WAIT_PC;
+
+ return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr);
+}
+
+static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ rq->flags |= REQ_QUIET;
+
+ info->dma = 0;
+ info->cmd = 0;
+
+ /*
+ * sg request
+ */
+ if (rq->bio) {
+ int mask = drive->queue->dma_alignment;
+ unsigned long addr = (unsigned long) page_address(bio_page(rq->bio));
+
+ info->cmd = rq_data_dir(rq);
+ info->dma = drive->using_dma;
+
+ /*
+ * check if dma is safe
+ */
+ if ((rq->data_len & mask) || (addr & mask))
+ info->dma = 0;
+ }
+
+ /* Start sending the command to the drive. */
+ return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont);
+}
+
+/****************************************************************************
+ * cdrom driver request routine.
+ */
+static ide_startstop_t
+ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
+{
+ ide_startstop_t action;
+ struct cdrom_info *info = drive->driver_data;
+
+ if (blk_fs_request(rq)) {
+ if (CDROM_CONFIG_FLAGS(drive)->seeking) {
+ unsigned long elapsed = jiffies - info->start_seek;
+ int stat = HWIF(drive)->INB(IDE_STATUS_REG);
+
+ if ((stat & SEEK_STAT) != SEEK_STAT) {
+ if (elapsed < IDECD_SEEK_TIMEOUT) {
+ ide_stall_queue(drive, IDECD_SEEK_TIMER);
+ return ide_stopped;
+ }
+ printk (KERN_ERR "%s: DSC timeout\n", drive->name);
+ }
+ CDROM_CONFIG_FLAGS(drive)->seeking = 0;
+ }
+ if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) {
+ action = cdrom_start_seek(drive, block);
+ } else {
+ if (rq_data_dir(rq) == READ)
+ action = cdrom_start_read(drive, block);
+ else
+ action = cdrom_start_write(drive, rq);
+ }
+ info->last_block = block;
+ return action;
+ } else if (rq->flags & (REQ_PC | REQ_SENSE)) {
+ return cdrom_do_packet_command(drive);
+ } else if (rq->flags & REQ_BLOCK_PC) {
+ return cdrom_do_block_pc(drive, rq);
+ } else if (rq->flags & REQ_SPECIAL) {
+ /*
+ * right now this can only be a reset...
+ */
+ cdrom_end_request(drive, 1);
+ return ide_stopped;
+ }
+
+ blk_dump_rq_flags(rq, "ide-cd bad flags");
+ cdrom_end_request(drive, 0);
+ return ide_stopped;
+}
+
+
+
+/****************************************************************************
+ * Ioctl handling.
+ *
+ * Routines which queue packet commands take as a final argument a pointer
+ * to a request_sense struct. If execution of the command results
+ * in an error with a CHECK CONDITION status, this structure will be filled
+ * with the results of the subsequent request sense command. The pointer
+ * can also be NULL, in which case no sense information is returned.
+ */
+
+#if ! STANDARD_ATAPI
+static inline
+int bin2bcd (int x)
+{
+ return (x%10) | ((x/10) << 4);
+}
+
+
+static inline
+int bcd2bin (int x)
+{
+ return (x >> 4) * 10 + (x & 0x0f);
+}
+
+static
+void msf_from_bcd (struct atapi_msf *msf)
+{
+ msf->minute = bcd2bin (msf->minute);
+ msf->second = bcd2bin (msf->second);
+ msf->frame = bcd2bin (msf->frame);
+}
+
+#endif /* not STANDARD_ATAPI */
+
+
+static inline
+void lba_to_msf (int lba, byte *m, byte *s, byte *f)
+{
+ lba += CD_MSF_OFFSET;
+ lba &= 0xffffff; /* negative lbas use only 24 bits */
+ *m = lba / (CD_SECS * CD_FRAMES);
+ lba %= (CD_SECS * CD_FRAMES);
+ *s = lba / CD_FRAMES;
+ *f = lba % CD_FRAMES;
+}
+
+
+static inline
+int msf_to_lba (byte m, byte s, byte f)
+{
+ return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
+}
+
+static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense)
+{
+ struct request req;
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = sense;
+ req.cmd[0] = GPCMD_TEST_UNIT_READY;
+ req.flags |= REQ_QUIET;
+
+#if ! STANDARD_ATAPI
+ /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to
+ switch CDs instead of supporting the LOAD_UNLOAD opcode */
+
+ req.cmd[7] = cdi->sanyo_slot % 3;
+#endif /* not STANDARD_ATAPI */
+
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+
+/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
+static int
+cdrom_lockdoor(ide_drive_t *drive, int lockflag, struct request_sense *sense)
+{
+ struct request_sense my_sense;
+ struct request req;
+ int stat;
+
+ if (sense == NULL)
+ sense = &my_sense;
+
+ /* If the drive cannot lock the door, just pretend. */
+ if (CDROM_CONFIG_FLAGS(drive)->no_doorlock) {
+ stat = 0;
+ } else {
+ cdrom_prepare_request(drive, &req);
+ req.sense = sense;
+ req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL;
+ req.cmd[4] = lockflag ? 1 : 0;
+ stat = cdrom_queue_packet_command(drive, &req);
+ }
+
+ /* If we got an illegal field error, the drive
+ probably cannot lock the door. */
+ if (stat != 0 &&
+ sense->sense_key == ILLEGAL_REQUEST &&
+ (sense->asc == 0x24 || sense->asc == 0x20)) {
+ printk (KERN_ERR "%s: door locking not supported\n",
+ drive->name);
+ CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
+ stat = 0;
+ }
+
+ /* no medium, that's alright. */
+ if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
+ stat = 0;
+
+ if (stat == 0)
+ CDROM_STATE_FLAGS(drive)->door_locked = lockflag;
+
+ return stat;
+}
+
+
+/* Eject the disk if EJECTFLAG is 0.
+ If EJECTFLAG is 1, try to reload the disk. */
+static int cdrom_eject(ide_drive_t *drive, int ejectflag,
+ struct request_sense *sense)
+{
+ struct request req;
+ char loej = 0x02;
+
+ if (CDROM_CONFIG_FLAGS(drive)->no_eject && !ejectflag)
+ return -EDRIVE_CANT_DO_THIS;
+
+ /* reload fails on some drives, if the tray is locked */
+ if (CDROM_STATE_FLAGS(drive)->door_locked && ejectflag)
+ return 0;
+
+ cdrom_prepare_request(drive, &req);
+
+ /* only tell drive to close tray if open, if it can do that */
+ if (ejectflag && !CDROM_CONFIG_FLAGS(drive)->close_tray)
+ loej = 0;
+
+ req.sense = sense;
+ req.cmd[0] = GPCMD_START_STOP_UNIT;
+ req.cmd[4] = loej | (ejectflag != 0);
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
+ unsigned long *sectors_per_frame,
+ struct request_sense *sense)
+{
+ struct {
+ __u32 lba;
+ __u32 blocklen;
+ } capbuf;
+
+ int stat;
+ struct request req;
+
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = sense;
+ req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
+ req.data = (char *)&capbuf;
+ req.data_len = sizeof(capbuf);
+
+ stat = cdrom_queue_packet_command(drive, &req);
+ if (stat == 0) {
+ *capacity = 1 + be32_to_cpu(capbuf.lba);
+ *sectors_per_frame =
+ be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS;
+ }
+
+ return stat;
+}
+
+static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
+ int format, char *buf, int buflen,
+ struct request_sense *sense)
+{
+ struct request req;
+
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = sense;
+ req.data = buf;
+ req.data_len = buflen;
+ req.flags |= REQ_QUIET;
+ req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP;
+ req.cmd[6] = trackno;
+ req.cmd[7] = (buflen >> 8);
+ req.cmd[8] = (buflen & 0xff);
+ req.cmd[9] = (format << 6);
+
+ if (msf_flag)
+ req.cmd[1] = 2;
+
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+
+/* Try to read the entire TOC for the disk into our internal buffer. */
+static int cdrom_read_toc(ide_drive_t *drive, struct request_sense *sense)
+{
+ int stat, ntracks, i;
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ struct atapi_toc *toc = info->toc;
+ struct {
+ struct atapi_toc_header hdr;
+ struct atapi_toc_entry ent;
+ } ms_tmp;
+ long last_written;
+ unsigned long sectors_per_frame = SECTORS_PER_FRAME;
+
+ if (toc == NULL) {
+ /* Try to allocate space. */
+ toc = (struct atapi_toc *) kmalloc (sizeof (struct atapi_toc),
+ GFP_KERNEL);
+ info->toc = toc;
+ if (toc == NULL) {
+ printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name);
+ return -ENOMEM;
+ }
+ }
+
+ /* Check to see if the existing data is still valid.
+ If it is, just return. */
+ (void) cdrom_check_status(drive, sense);
+
+ if (CDROM_STATE_FLAGS(drive)->toc_valid)
+ return 0;
+
+ /* Try to get the total cdrom capacity and sector size. */
+ stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame,
+ sense);
+ if (stat)
+ toc->capacity = 0x1fffff;
+
+ set_capacity(info->disk, toc->capacity * sectors_per_frame);
+ blk_queue_hardsect_size(drive->queue,
+ sectors_per_frame << SECTOR_BITS);
+
+ /* First read just the header, so we know how long the TOC is. */
+ stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
+ sizeof(struct atapi_toc_header), sense);
+ if (stat) return stat;
+
+#if ! STANDARD_ATAPI
+ if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
+ toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+ toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
+ }
+#endif /* not STANDARD_ATAPI */
+
+ ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+ if (ntracks <= 0)
+ return -EIO;
+ if (ntracks > MAX_TRACKS)
+ ntracks = MAX_TRACKS;
+
+ /* Now read the whole schmeer. */
+ stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
+ (char *)&toc->hdr,
+ sizeof(struct atapi_toc_header) +
+ (ntracks + 1) *
+ sizeof(struct atapi_toc_entry), sense);
+
+ if (stat && toc->hdr.first_track > 1) {
+ /* Cds with CDI tracks only don't have any TOC entries,
+ despite of this the returned values are
+ first_track == last_track = number of CDI tracks + 1,
+ so that this case is indistinguishable from the same
+ layout plus an additional audio track.
+ If we get an error for the regular case, we assume
+ a CDI without additional audio tracks. In this case
+ the readable TOC is empty (CDI tracks are not included)
+ and only holds the Leadout entry. Heiko Eißfeldt */
+ ntracks = 0;
+ stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
+ (char *)&toc->hdr,
+ sizeof(struct atapi_toc_header) +
+ (ntracks + 1) *
+ sizeof(struct atapi_toc_entry),
+ sense);
+ if (stat) {
+ return stat;
+ }
+#if ! STANDARD_ATAPI
+ if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
+ toc->hdr.first_track = bin2bcd(CDROM_LEADOUT);
+ toc->hdr.last_track = bin2bcd(CDROM_LEADOUT);
+ } else
+#endif /* not STANDARD_ATAPI */
+ {
+ toc->hdr.first_track = CDROM_LEADOUT;
+ toc->hdr.last_track = CDROM_LEADOUT;
+ }
+ }
+
+ if (stat)
+ return stat;
+
+ toc->hdr.toc_length = ntohs (toc->hdr.toc_length);
+
+#if ! STANDARD_ATAPI
+ if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
+ toc->hdr.first_track = bcd2bin(toc->hdr.first_track);
+ toc->hdr.last_track = bcd2bin(toc->hdr.last_track);
+ }
+#endif /* not STANDARD_ATAPI */
+
+ for (i=0; i<=ntracks; i++) {
+#if ! STANDARD_ATAPI
+ if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) {
+ if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd)
+ toc->ent[i].track = bcd2bin(toc->ent[i].track);
+ msf_from_bcd(&toc->ent[i].addr.msf);
+ }
+#endif /* not STANDARD_ATAPI */
+ toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute,
+ toc->ent[i].addr.msf.second,
+ toc->ent[i].addr.msf.frame);
+ }
+
+ /* Read the multisession information. */
+ if (toc->hdr.first_track != CDROM_LEADOUT) {
+ /* Read the multisession information. */
+ stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
+ sizeof(ms_tmp), sense);
+ if (stat) return stat;
+
+ toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba);
+ } else {
+ ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
+ toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */
+ }
+
+#if ! STANDARD_ATAPI
+ if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) {
+ /* Re-read multisession information using MSF format */
+ stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
+ sizeof(ms_tmp), sense);
+ if (stat)
+ return stat;
+
+ msf_from_bcd (&ms_tmp.ent.addr.msf);
+ toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute,
+ ms_tmp.ent.addr.msf.second,
+ ms_tmp.ent.addr.msf.frame);
+ }
+#endif /* not STANDARD_ATAPI */
+
+ toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
+
+ /* Now try to get the total cdrom capacity. */
+ stat = cdrom_get_last_written(cdi, &last_written);
+ if (!stat && (last_written > toc->capacity)) {
+ toc->capacity = last_written;
+ set_capacity(info->disk, toc->capacity * sectors_per_frame);
+ }
+
+ /* Remember that we've read this stuff. */
+ CDROM_STATE_FLAGS(drive)->toc_valid = 1;
+
+ return 0;
+}
+
+
+static int cdrom_read_subchannel(ide_drive_t *drive, int format, char *buf,
+ int buflen, struct request_sense *sense)
+{
+ struct request req;
+
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = sense;
+ req.data = buf;
+ req.data_len = buflen;
+ req.cmd[0] = GPCMD_READ_SUBCHANNEL;
+ req.cmd[1] = 2; /* MSF addressing */
+ req.cmd[2] = 0x40; /* request subQ data */
+ req.cmd[3] = format;
+ req.cmd[7] = (buflen >> 8);
+ req.cmd[8] = (buflen & 0xff);
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+/* ATAPI cdrom drives are free to select the speed you request or any slower
+ rate :-( Requesting too fast a speed will _not_ produce an error. */
+static int cdrom_select_speed(ide_drive_t *drive, int speed,
+ struct request_sense *sense)
+{
+ struct request req;
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = sense;
+ if (speed == 0)
+ speed = 0xffff; /* set to max */
+ else
+ speed *= 177; /* Nx to kbytes/s */
+
+ req.cmd[0] = GPCMD_SET_SPEED;
+ /* Read Drive speed in kbytes/second MSB */
+ req.cmd[2] = (speed >> 8) & 0xff;
+ /* Read Drive speed in kbytes/second LSB */
+ req.cmd[3] = speed & 0xff;
+ if (CDROM_CONFIG_FLAGS(drive)->cd_r ||
+ CDROM_CONFIG_FLAGS(drive)->cd_rw ||
+ CDROM_CONFIG_FLAGS(drive)->dvd_r) {
+ /* Write Drive speed in kbytes/second MSB */
+ req.cmd[4] = (speed >> 8) & 0xff;
+ /* Write Drive speed in kbytes/second LSB */
+ req.cmd[5] = speed & 0xff;
+ }
+
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+static int cdrom_play_audio(ide_drive_t *drive, int lba_start, int lba_end)
+{
+ struct request_sense sense;
+ struct request req;
+
+ cdrom_prepare_request(drive, &req);
+
+ req.sense = &sense;
+ req.cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+ lba_to_msf(lba_start, &req.cmd[3], &req.cmd[4], &req.cmd[5]);
+ lba_to_msf(lba_end-1, &req.cmd[6], &req.cmd[7], &req.cmd[8]);
+
+ return cdrom_queue_packet_command(drive, &req);
+}
+
+static int cdrom_get_toc_entry(ide_drive_t *drive, int track,
+ struct atapi_toc_entry **ent)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct atapi_toc *toc = info->toc;
+ int ntracks;
+
+ /*
+ * don't serve cached data, if the toc isn't valid
+ */
+ if (!CDROM_STATE_FLAGS(drive)->toc_valid)
+ return -EINVAL;
+
+ /* Check validity of requested track number. */
+ ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+ if (toc->hdr.first_track == CDROM_LEADOUT) ntracks = 0;
+ if (track == CDROM_LEADOUT)
+ *ent = &toc->ent[ntracks];
+ else if (track < toc->hdr.first_track ||
+ track > toc->hdr.last_track)
+ return -EINVAL;
+ else
+ *ent = &toc->ent[track - toc->hdr.first_track];
+
+ return 0;
+}
+
+/* the generic packet interface to cdrom.c */
+static int ide_cdrom_packet(struct cdrom_device_info *cdi,
+ struct packet_command *cgc)
+{
+ struct request req;
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+
+ if (cgc->timeout <= 0)
+ cgc->timeout = ATAPI_WAIT_PC;
+
+ /* here we queue the commands from the uniform CD-ROM
+ layer. the packet must be complete, as we do not
+ touch it at all. */
+ cdrom_prepare_request(drive, &req);
+ memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
+ if (cgc->sense)
+ memset(cgc->sense, 0, sizeof(struct request_sense));
+ req.data = cgc->buffer;
+ req.data_len = cgc->buflen;
+ req.timeout = cgc->timeout;
+
+ if (cgc->quiet)
+ req.flags |= REQ_QUIET;
+
+ req.sense = cgc->sense;
+ cgc->stat = cdrom_queue_packet_command(drive, &req);
+ if (!cgc->stat)
+ cgc->buflen -= req.data_len;
+ return cgc->stat;
+}
+
+static
+int ide_cdrom_dev_ioctl (struct cdrom_device_info *cdi,
+ unsigned int cmd, unsigned long arg)
+{
+ struct packet_command cgc;
+ char buffer[16];
+ int stat;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN);
+
+ /* These will be moved into the Uniform layer shortly... */
+ switch (cmd) {
+ case CDROMSETSPINDOWN: {
+ char spindown;
+
+ if (copy_from_user(&spindown, (void __user *) arg, sizeof(char)))
+ return -EFAULT;
+
+ if ((stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0)))
+ return stat;
+
+ buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f);
+
+ return cdrom_mode_select(cdi, &cgc);
+ }
+
+ case CDROMGETSPINDOWN: {
+ char spindown;
+
+ if ((stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0)))
+ return stat;
+
+ spindown = buffer[11] & 0x0f;
+
+ if (copy_to_user((void __user *) arg, &spindown, sizeof (char)))
+ return -EFAULT;
+
+ return 0;
+ }
+
+ default:
+ return -EINVAL;
+ }
+
+}
+
+static
+int ide_cdrom_audio_ioctl (struct cdrom_device_info *cdi,
+ unsigned int cmd, void *arg)
+
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct cdrom_info *info = drive->driver_data;
+ int stat;
+
+ switch (cmd) {
+ /*
+ * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since
+ * atapi doesn't support it
+ */
+ case CDROMPLAYTRKIND: {
+ unsigned long lba_start, lba_end;
+ struct cdrom_ti *ti = (struct cdrom_ti *)arg;
+ struct atapi_toc_entry *first_toc, *last_toc;
+
+ stat = cdrom_get_toc_entry(drive, ti->cdti_trk0, &first_toc);
+ if (stat)
+ return stat;
+
+ stat = cdrom_get_toc_entry(drive, ti->cdti_trk1, &last_toc);
+ if (stat)
+ return stat;
+
+ if (ti->cdti_trk1 != CDROM_LEADOUT)
+ ++last_toc;
+ lba_start = first_toc->addr.lba;
+ lba_end = last_toc->addr.lba;
+
+ if (lba_end <= lba_start)
+ return -EINVAL;
+
+ return cdrom_play_audio(drive, lba_start, lba_end);
+ }
+
+ case CDROMREADTOCHDR: {
+ struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg;
+ struct atapi_toc *toc;
+
+ /* Make sure our saved TOC is valid. */
+ stat = cdrom_read_toc(drive, NULL);
+ if (stat) return stat;
+
+ toc = info->toc;
+ tochdr->cdth_trk0 = toc->hdr.first_track;
+ tochdr->cdth_trk1 = toc->hdr.last_track;
+
+ return 0;
+ }
+
+ case CDROMREADTOCENTRY: {
+ struct cdrom_tocentry *tocentry = (struct cdrom_tocentry*) arg;
+ struct atapi_toc_entry *toce;
+
+ stat = cdrom_get_toc_entry(drive, tocentry->cdte_track, &toce);
+ if (stat) return stat;
+
+ tocentry->cdte_ctrl = toce->control;
+ tocentry->cdte_adr = toce->adr;
+ if (tocentry->cdte_format == CDROM_MSF) {
+ lba_to_msf (toce->addr.lba,
+ &tocentry->cdte_addr.msf.minute,
+ &tocentry->cdte_addr.msf.second,
+ &tocentry->cdte_addr.msf.frame);
+ } else
+ tocentry->cdte_addr.lba = toce->addr.lba;
+
+ return 0;
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static
+int ide_cdrom_reset (struct cdrom_device_info *cdi)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct request_sense sense;
+ struct request req;
+ int ret;
+
+ cdrom_prepare_request(drive, &req);
+ req.flags = REQ_SPECIAL | REQ_QUIET;
+ ret = ide_do_drive_cmd(drive, &req, ide_wait);
+
+ /*
+ * A reset will unlock the door. If it was previously locked,
+ * lock it again.
+ */
+ if (CDROM_STATE_FLAGS(drive)->door_locked)
+ (void) cdrom_lockdoor(drive, 1, &sense);
+
+ return ret;
+}
+
+
+static
+int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct request_sense sense;
+
+ if (position) {
+ int stat = cdrom_lockdoor(drive, 0, &sense);
+ if (stat) return stat;
+ }
+
+ return cdrom_eject(drive, !position, &sense);
+}
+
+static
+int ide_cdrom_lock_door (struct cdrom_device_info *cdi, int lock)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ return cdrom_lockdoor(drive, lock, NULL);
+}
+
+static
+int ide_cdrom_select_speed (struct cdrom_device_info *cdi, int speed)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct request_sense sense;
+ int stat;
+
+ if ((stat = cdrom_select_speed(drive, speed, &sense)) < 0)
+ return stat;
+
+ cdi->speed = CDROM_STATE_FLAGS(drive)->current_speed;
+ return 0;
+}
+
+/*
+ * add logic to try GET_EVENT command first to check for media and tray
+ * status. this should be supported by newer cd-r/w and all DVD etc
+ * drives
+ */
+static
+int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct media_event_desc med;
+ struct request_sense sense;
+ int stat;
+
+ if (slot_nr != CDSL_CURRENT)
+ return -EINVAL;
+
+ stat = cdrom_check_status(drive, &sense);
+ if (!stat || sense.sense_key == UNIT_ATTENTION)
+ return CDS_DISC_OK;
+
+ if (!cdrom_get_media_event(cdi, &med)) {
+ if (med.media_present)
+ return CDS_DISC_OK;
+ else if (med.door_open)
+ return CDS_TRAY_OPEN;
+ else
+ return CDS_NO_DISC;
+ }
+
+ if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04)
+ return CDS_DISC_OK;
+
+ /*
+ * If not using Mt Fuji extended media tray reports,
+ * just return TRAY_OPEN since ATAPI doesn't provide
+ * any other way to detect this...
+ */
+ if (sense.sense_key == NOT_READY) {
+ if (sense.asc == 0x3a) {
+ if (sense.ascq == 1)
+ return CDS_NO_DISC;
+ else if (sense.ascq == 0 || sense.ascq == 2)
+ return CDS_TRAY_OPEN;
+ }
+ }
+
+ return CDS_DRIVE_NOT_READY;
+}
+
+static
+int ide_cdrom_get_last_session (struct cdrom_device_info *cdi,
+ struct cdrom_multisession *ms_info)
+{
+ struct atapi_toc *toc;
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ struct cdrom_info *info = drive->driver_data;
+ struct request_sense sense;
+ int ret;
+
+ if (!CDROM_STATE_FLAGS(drive)->toc_valid || info->toc == NULL)
+ if ((ret = cdrom_read_toc(drive, &sense)))
+ return ret;
+
+ toc = info->toc;
+ ms_info->addr.lba = toc->last_session_lba;
+ ms_info->xa_flag = toc->xa_flag;
+
+ return 0;
+}
+
+static
+int ide_cdrom_get_mcn (struct cdrom_device_info *cdi,
+ struct cdrom_mcn *mcn_info)
+{
+ int stat;
+ char mcnbuf[24];
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+
+/* get MCN */
+ if ((stat = cdrom_read_subchannel(drive, 2, mcnbuf, sizeof (mcnbuf), NULL)))
+ return stat;
+
+ memcpy (mcn_info->medium_catalog_number, mcnbuf+9,
+ sizeof (mcn_info->medium_catalog_number)-1);
+ mcn_info->medium_catalog_number[sizeof (mcn_info->medium_catalog_number)-1]
+ = '\0';
+
+ return 0;
+}
+
+
+
+/****************************************************************************
+ * Other driver requests (open, close, check media change).
+ */
+
+static
+int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi,
+ int slot_nr)
+{
+ ide_drive_t *drive = (ide_drive_t*) cdi->handle;
+ int retval;
+
+ if (slot_nr == CDSL_CURRENT) {
+ (void) cdrom_check_status(drive, NULL);
+ retval = CDROM_STATE_FLAGS(drive)->media_changed;
+ CDROM_STATE_FLAGS(drive)->media_changed = 0;
+ return retval;
+ } else {
+ return -EINVAL;
+ }
+}
+
+
+static
+int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose)
+{
+ return 0;
+}
+
+/*
+ * Close down the device. Invalidate all cached blocks.
+ */
+
+static
+void ide_cdrom_release_real (struct cdrom_device_info *cdi)
+{
+ ide_drive_t *drive = cdi->handle;
+
+ if (!cdi->use_count)
+ CDROM_STATE_FLAGS(drive)->toc_valid = 0;
+}
+
+
+
+/****************************************************************************
+ * Device initialization.
+ */
+static struct cdrom_device_ops ide_cdrom_dops = {
+ .open = ide_cdrom_open_real,
+ .release = ide_cdrom_release_real,
+ .drive_status = ide_cdrom_drive_status,
+ .media_changed = ide_cdrom_check_media_change_real,
+ .tray_move = ide_cdrom_tray_move,
+ .lock_door = ide_cdrom_lock_door,
+ .select_speed = ide_cdrom_select_speed,
+ .get_last_session = ide_cdrom_get_last_session,
+ .get_mcn = ide_cdrom_get_mcn,
+ .reset = ide_cdrom_reset,
+ .audio_ioctl = ide_cdrom_audio_ioctl,
+ .dev_ioctl = ide_cdrom_dev_ioctl,
+ .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK |
+ CDC_SELECT_SPEED | CDC_SELECT_DISC |
+ CDC_MULTI_SESSION | CDC_MCN |
+ CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET |
+ CDC_IOCTLS | CDC_DRIVE_STATUS | CDC_CD_R |
+ CDC_CD_RW | CDC_DVD | CDC_DVD_R| CDC_DVD_RAM |
+ CDC_GENERIC_PACKET | CDC_MO_DRIVE | CDC_MRW |
+ CDC_MRW_W | CDC_RAM,
+ .generic_packet = ide_cdrom_packet,
+};
+
+static int ide_cdrom_register (ide_drive_t *drive, int nslots)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *devinfo = &info->devinfo;
+
+ devinfo->ops = &ide_cdrom_dops;
+ devinfo->mask = 0;
+ devinfo->speed = CDROM_STATE_FLAGS(drive)->current_speed;
+ devinfo->capacity = nslots;
+ devinfo->handle = (void *) drive;
+ strcpy(devinfo->name, drive->name);
+
+ /* set capability mask to match the probe. */
+ if (!CDROM_CONFIG_FLAGS(drive)->cd_r)
+ devinfo->mask |= CDC_CD_R;
+ if (!CDROM_CONFIG_FLAGS(drive)->cd_rw)
+ devinfo->mask |= CDC_CD_RW;
+ if (!CDROM_CONFIG_FLAGS(drive)->dvd)
+ devinfo->mask |= CDC_DVD;
+ if (!CDROM_CONFIG_FLAGS(drive)->dvd_r)
+ devinfo->mask |= CDC_DVD_R;
+ if (!CDROM_CONFIG_FLAGS(drive)->dvd_ram)
+ devinfo->mask |= CDC_DVD_RAM;
+ if (!CDROM_CONFIG_FLAGS(drive)->is_changer)
+ devinfo->mask |= CDC_SELECT_DISC;
+ if (!CDROM_CONFIG_FLAGS(drive)->audio_play)
+ devinfo->mask |= CDC_PLAY_AUDIO;
+ if (!CDROM_CONFIG_FLAGS(drive)->close_tray)
+ devinfo->mask |= CDC_CLOSE_TRAY;
+ if (!CDROM_CONFIG_FLAGS(drive)->mo_drive)
+ devinfo->mask |= CDC_MO_DRIVE;
+
+ devinfo->disk = info->disk;
+ return register_cdrom(devinfo);
+}
+
+static
+int ide_cdrom_get_capabilities(ide_drive_t *drive, struct atapi_capabilities_page *cap)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ struct packet_command cgc;
+ int stat, attempts = 3, size = sizeof(*cap);
+
+ /*
+ * ACER50 (and others?) require the full spec length mode sense
+ * page capabilities size, but older drives break.
+ */
+ if (!(!strcmp(drive->id->model, "ATAPI CD ROM DRIVE 50X MAX") ||
+ !strcmp(drive->id->model, "WPI CDS-32X")))
+ size -= sizeof(cap->pad);
+
+ init_cdrom_command(&cgc, cap, size, CGC_DATA_UNKNOWN);
+ do { /* we seem to get stat=0x01,err=0x00 the first time (??) */
+ stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0);
+ if (!stat)
+ break;
+ } while (--attempts);
+ return stat;
+}
+
+static
+int ide_cdrom_probe_capabilities (ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ struct atapi_capabilities_page cap;
+ int nslots = 1;
+
+ if (drive->media == ide_optical) {
+ CDROM_CONFIG_FLAGS(drive)->mo_drive = 1;
+ CDROM_CONFIG_FLAGS(drive)->ram = 1;
+ printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name);
+ return nslots;
+ }
+
+ if (CDROM_CONFIG_FLAGS(drive)->nec260 ||
+ !strcmp(drive->id->model,"STINGRAY 8422 IDE 8X CD-ROM 7-27-95")) {
+ CDROM_CONFIG_FLAGS(drive)->no_eject = 0;
+ CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
+ return nslots;
+ }
+
+ /*
+ * we have to cheat a little here. the packet will eventually
+ * be queued with ide_cdrom_packet(), which extracts the
+ * drive from cdi->handle. Since this device hasn't been
+ * registered with the Uniform layer yet, it can't do this.
+ * Same goes for cdi->ops.
+ */
+ cdi->handle = (ide_drive_t *) drive;
+ cdi->ops = &ide_cdrom_dops;
+
+ if (ide_cdrom_get_capabilities(drive, &cap))
+ return 0;
+
+ if (cap.lock == 0)
+ CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
+ if (cap.eject)
+ CDROM_CONFIG_FLAGS(drive)->no_eject = 0;
+ if (cap.cd_r_write)
+ CDROM_CONFIG_FLAGS(drive)->cd_r = 1;
+ if (cap.cd_rw_write) {
+ CDROM_CONFIG_FLAGS(drive)->cd_rw = 1;
+ CDROM_CONFIG_FLAGS(drive)->ram = 1;
+ }
+ if (cap.test_write)
+ CDROM_CONFIG_FLAGS(drive)->test_write = 1;
+ if (cap.dvd_ram_read || cap.dvd_r_read || cap.dvd_rom)
+ CDROM_CONFIG_FLAGS(drive)->dvd = 1;
+ if (cap.dvd_ram_write) {
+ CDROM_CONFIG_FLAGS(drive)->dvd_ram = 1;
+ CDROM_CONFIG_FLAGS(drive)->ram = 1;
+ }
+ if (cap.dvd_r_write)
+ CDROM_CONFIG_FLAGS(drive)->dvd_r = 1;
+ if (cap.audio_play)
+ CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
+ if (cap.mechtype == mechtype_caddy || cap.mechtype == mechtype_popup)
+ CDROM_CONFIG_FLAGS(drive)->close_tray = 0;
+
+ /* Some drives used by Apple don't advertise audio play
+ * but they do support reading TOC & audio datas
+ */
+ if (strcmp(drive->id->model, "MATSHITADVD-ROM SR-8187") == 0 ||
+ strcmp(drive->id->model, "MATSHITADVD-ROM SR-8186") == 0 ||
+ strcmp(drive->id->model, "MATSHITADVD-ROM SR-8176") == 0 ||
+ strcmp(drive->id->model, "MATSHITADVD-ROM SR-8174") == 0)
+ CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
+
+#if ! STANDARD_ATAPI
+ if (cdi->sanyo_slot > 0) {
+ CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
+ nslots = 3;
+ }
+
+ else
+#endif /* not STANDARD_ATAPI */
+ if (cap.mechtype == mechtype_individual_changer ||
+ cap.mechtype == mechtype_cartridge_changer) {
+ if ((nslots = cdrom_number_of_slots(cdi)) > 1) {
+ CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
+ CDROM_CONFIG_FLAGS(drive)->supp_disc_present = 1;
+ }
+ }
+
+ /* The ACER/AOpen 24X cdrom has the speed fields byte-swapped */
+ if (!drive->id->model[0] &&
+ !strncmp(drive->id->fw_rev, "241N", 4)) {
+ CDROM_STATE_FLAGS(drive)->current_speed =
+ (((unsigned int)cap.curspeed) + (176/2)) / 176;
+ CDROM_CONFIG_FLAGS(drive)->max_speed =
+ (((unsigned int)cap.maxspeed) + (176/2)) / 176;
+ } else {
+ CDROM_STATE_FLAGS(drive)->current_speed =
+ (ntohs(cap.curspeed) + (176/2)) / 176;
+ CDROM_CONFIG_FLAGS(drive)->max_speed =
+ (ntohs(cap.maxspeed) + (176/2)) / 176;
+ }
+
+ /* don't print speed if the drive reported 0.
+ */
+ printk(KERN_INFO "%s: ATAPI", drive->name);
+ if (CDROM_CONFIG_FLAGS(drive)->max_speed)
+ printk(" %dX", CDROM_CONFIG_FLAGS(drive)->max_speed);
+ printk(" %s", CDROM_CONFIG_FLAGS(drive)->dvd ? "DVD-ROM" : "CD-ROM");
+
+ if (CDROM_CONFIG_FLAGS(drive)->dvd_r|CDROM_CONFIG_FLAGS(drive)->dvd_ram)
+ printk(" DVD%s%s",
+ (CDROM_CONFIG_FLAGS(drive)->dvd_r)? "-R" : "",
+ (CDROM_CONFIG_FLAGS(drive)->dvd_ram)? "-RAM" : "");
+
+ if (CDROM_CONFIG_FLAGS(drive)->cd_r|CDROM_CONFIG_FLAGS(drive)->cd_rw)
+ printk(" CD%s%s",
+ (CDROM_CONFIG_FLAGS(drive)->cd_r)? "-R" : "",
+ (CDROM_CONFIG_FLAGS(drive)->cd_rw)? "/RW" : "");
+
+ if (CDROM_CONFIG_FLAGS(drive)->is_changer)
+ printk(" changer w/%d slots", nslots);
+ else
+ printk(" drive");
+
+ printk(", %dkB Cache", be16_to_cpu(cap.buffer_size));
+
+ if (drive->using_dma)
+ ide_dma_verbose(drive);
+
+ printk("\n");
+
+ return nslots;
+}
+
+static void ide_cdrom_add_settings(ide_drive_t *drive)
+{
+ ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL);
+}
+
+/*
+ * standard prep_rq_fn that builds 10 byte cmds
+ */
+static int ide_cdrom_prep_fs(request_queue_t *q, struct request *rq)
+{
+ int hard_sect = queue_hardsect_size(q);
+ long block = (long)rq->hard_sector / (hard_sect >> 9);
+ unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);
+
+ memset(rq->cmd, 0, sizeof(rq->cmd));
+
+ if (rq_data_dir(rq) == READ)
+ rq->cmd[0] = GPCMD_READ_10;
+ else
+ rq->cmd[0] = GPCMD_WRITE_10;
+
+ /*
+ * fill in lba
+ */
+ rq->cmd[2] = (block >> 24) & 0xff;
+ rq->cmd[3] = (block >> 16) & 0xff;
+ rq->cmd[4] = (block >> 8) & 0xff;
+ rq->cmd[5] = block & 0xff;
+
+ /*
+ * and transfer length
+ */
+ rq->cmd[7] = (blocks >> 8) & 0xff;
+ rq->cmd[8] = blocks & 0xff;
+ rq->cmd_len = 10;
+ return BLKPREP_OK;
+}
+
+/*
+ * Most of the SCSI commands are supported directly by ATAPI devices.
+ * This transform handles the few exceptions.
+ */
+static int ide_cdrom_prep_pc(struct request *rq)
+{
+ u8 *c = rq->cmd;
+
+ /*
+ * Transform 6-byte read/write commands to the 10-byte version
+ */
+ if (c[0] == READ_6 || c[0] == WRITE_6) {
+ c[8] = c[4];
+ c[5] = c[3];
+ c[4] = c[2];
+ c[3] = c[1] & 0x1f;
+ c[2] = 0;
+ c[1] &= 0xe0;
+ c[0] += (READ_10 - READ_6);
+ rq->cmd_len = 10;
+ return BLKPREP_OK;
+ }
+
+ /*
+ * it's silly to pretend we understand 6-byte sense commands, just
+ * reject with ILLEGAL_REQUEST and the caller should take the
+ * appropriate action
+ */
+ if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) {
+ rq->errors = ILLEGAL_REQUEST;
+ return BLKPREP_KILL;
+ }
+
+ return BLKPREP_OK;
+}
+
+static int ide_cdrom_prep_fn(request_queue_t *q, struct request *rq)
+{
+ if (rq->flags & REQ_CMD)
+ return ide_cdrom_prep_fs(q, rq);
+ else if (rq->flags & REQ_BLOCK_PC)
+ return ide_cdrom_prep_pc(rq);
+
+ return 0;
+}
+
+static
+int ide_cdrom_setup (ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+ struct cdrom_device_info *cdi = &info->devinfo;
+ int nslots;
+
+ blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn);
+ blk_queue_dma_alignment(drive->queue, 31);
+ drive->queue->unplug_delay = (1 * HZ) / 1000;
+ if (!drive->queue->unplug_delay)
+ drive->queue->unplug_delay = 1;
+
+ drive->special.all = 0;
+
+ CDROM_STATE_FLAGS(drive)->media_changed = 1;
+ CDROM_STATE_FLAGS(drive)->toc_valid = 0;
+ CDROM_STATE_FLAGS(drive)->door_locked = 0;
+
+#if NO_DOOR_LOCKING
+ CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
+#else
+ CDROM_CONFIG_FLAGS(drive)->no_doorlock = 0;
+#endif
+
+ CDROM_CONFIG_FLAGS(drive)->drq_interrupt = ((drive->id->config & 0x0060) == 0x20);
+ CDROM_CONFIG_FLAGS(drive)->is_changer = 0;
+ CDROM_CONFIG_FLAGS(drive)->cd_r = 0;
+ CDROM_CONFIG_FLAGS(drive)->cd_rw = 0;
+ CDROM_CONFIG_FLAGS(drive)->test_write = 0;
+ CDROM_CONFIG_FLAGS(drive)->dvd = 0;
+ CDROM_CONFIG_FLAGS(drive)->dvd_r = 0;
+ CDROM_CONFIG_FLAGS(drive)->dvd_ram = 0;
+ CDROM_CONFIG_FLAGS(drive)->no_eject = 1;
+ CDROM_CONFIG_FLAGS(drive)->supp_disc_present = 0;
+ CDROM_CONFIG_FLAGS(drive)->audio_play = 0;
+ CDROM_CONFIG_FLAGS(drive)->close_tray = 1;
+
+ /* limit transfer size per interrupt. */
+ CDROM_CONFIG_FLAGS(drive)->limit_nframes = 0;
+ /* a testament to the nice quality of Samsung drives... */
+ if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2430"))
+ CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
+ else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2432"))
+ CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
+ /* the 3231 model does not support the SET_CD_SPEED command */
+ else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-3231"))
+ cdi->mask |= CDC_SELECT_SPEED;
+
+#if ! STANDARD_ATAPI
+ /* by default Sanyo 3 CD changer support is turned off and
+ ATAPI Rev 2.2+ standard support for CD changers is used */
+ cdi->sanyo_slot = 0;
+
+ CDROM_CONFIG_FLAGS(drive)->nec260 = 0;
+ CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 0;
+ CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 0;
+ CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 0;
+ CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 0;
+
+ if (strcmp (drive->id->model, "V003S0DS") == 0 &&
+ drive->id->fw_rev[4] == '1' &&
+ drive->id->fw_rev[6] <= '2') {
+ /* Vertos 300.
+ Some versions of this drive like to talk BCD. */
+ CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1;
+ }
+
+ else if (strcmp (drive->id->model, "V006E0DS") == 0 &&
+ drive->id->fw_rev[4] == '1' &&
+ drive->id->fw_rev[6] <= '2') {
+ /* Vertos 600 ESD. */
+ CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1;
+ }
+ else if (strcmp(drive->id->model, "NEC CD-ROM DRIVE:260") == 0 &&
+ strncmp(drive->id->fw_rev, "1.01", 4) == 0) { /* FIXME */
+ /* Old NEC260 (not R).
+ This drive was released before the 1.2 version
+ of the spec. */
+ CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->nec260 = 1;
+ }
+ else if (strcmp(drive->id->model, "WEARNES CDD-120") == 0 &&
+ strncmp(drive->id->fw_rev, "A1.1", 4) == 0) { /* FIXME */
+ /* Wearnes */
+ CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1;
+ CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1;
+ }
+ /* Sanyo 3 CD changer uses a non-standard command
+ for CD changing */
+ else if ((strcmp(drive->id->model, "CD-ROM CDR-C3 G") == 0) ||
+ (strcmp(drive->id->model, "CD-ROM CDR-C3G") == 0) ||
+ (strcmp(drive->id->model, "CD-ROM CDR_C36") == 0)) {
+ /* uses CD in slot 0 when value is set to 3 */
+ cdi->sanyo_slot = 3;
+ }
+#endif /* not STANDARD_ATAPI */
+
+ info->toc = NULL;
+ info->buffer = NULL;
+ info->sector_buffered = 0;
+ info->nsectors_buffered = 0;
+ info->changer_info = NULL;
+ info->last_block = 0;
+ info->start_seek = 0;
+
+ nslots = ide_cdrom_probe_capabilities (drive);
+
+ /*
+ * set correct block size
+ */
+ blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE);
+
+ if (drive->autotune == IDE_TUNE_DEFAULT ||
+ drive->autotune == IDE_TUNE_AUTO)
+ drive->dsc_overlap = (drive->next != drive);
+#if 0
+ drive->dsc_overlap = (HWIF(drive)->no_dsc) ? 0 : 1;
+ if (HWIF(drive)->no_dsc) {
+ printk(KERN_INFO "ide-cd: %s: disabling DSC overlap\n",
+ drive->name);
+ drive->dsc_overlap = 0;
+ }
+#endif
+
+ if (ide_cdrom_register(drive, nslots)) {
+ printk (KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name);
+ info->devinfo.handle = NULL;
+ return 1;
+ }
+ ide_cdrom_add_settings(drive);
+ return 0;
+}
+
+static
+sector_t ide_cdrom_capacity (ide_drive_t *drive)
+{
+ unsigned long capacity, sectors_per_frame;
+
+ if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL))
+ return 0;
+
+ return capacity * sectors_per_frame;
+}
+
+static
+int ide_cdrom_cleanup(ide_drive_t *drive)
+{
+ struct cdrom_info *info = drive->driver_data;
+
+ if (ide_unregister_subdriver(drive)) {
+ printk(KERN_ERR "%s: %s: failed to ide_unregister_subdriver\n",
+ __FUNCTION__, drive->name);
+ return 1;
+ }
+
+ del_gendisk(info->disk);
+
+ ide_cd_put(info);
+
+ return 0;
+}
+
+static void ide_cd_release(struct kref *kref)
+{
+ struct cdrom_info *info = to_ide_cd(kref);
+ struct cdrom_device_info *devinfo = &info->devinfo;
+ ide_drive_t *drive = info->drive;
+ struct gendisk *g = info->disk;
+
+ if (info->buffer != NULL)
+ kfree(info->buffer);
+ if (info->toc != NULL)
+ kfree(info->toc);
+ if (info->changer_info != NULL)
+ kfree(info->changer_info);
+ if (devinfo->handle == drive && unregister_cdrom(devinfo))
+ printk(KERN_ERR "%s: %s failed to unregister device from the cdrom "
+ "driver.\n", __FUNCTION__, drive->name);
+ drive->dsc_overlap = 0;
+ drive->driver_data = NULL;
+ blk_queue_prep_rq(drive->queue, NULL);
+ g->private_data = NULL;
+ put_disk(g);
+ kfree(info);
+}
+
+static int ide_cdrom_attach (ide_drive_t *drive);
+
+#ifdef CONFIG_PROC_FS
+static int proc_idecd_read_capacity
+ (char *page, char **start, off_t off, int count, int *eof, void *data)
+{
+ ide_drive_t*drive = (ide_drive_t *)data;
+ int len;
+
+ len = sprintf(page,"%llu\n", (long long)ide_cdrom_capacity(drive));
+ PROC_IDE_READ_RETURN(page,start,off,count,eof,len);
+}
+
+static ide_proc_entry_t idecd_proc[] = {
+ { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL },
+ { NULL, 0, NULL, NULL }
+};
+#else
+# define idecd_proc NULL
+#endif
+
+static ide_driver_t ide_cdrom_driver = {
+ .owner = THIS_MODULE,
+ .name = "ide-cdrom",
+ .version = IDECD_VERSION,
+ .media = ide_cdrom,
+ .busy = 0,
+ .supports_dsc_overlap = 1,
+ .cleanup = ide_cdrom_cleanup,
+ .do_request = ide_do_rw_cdrom,
+ .end_request = ide_end_request,
+ .error = __ide_error,
+ .abort = __ide_abort,
+ .proc = idecd_proc,
+ .attach = ide_cdrom_attach,
+ .drives = LIST_HEAD_INIT(ide_cdrom_driver.drives),
+};
+
+static int idecd_open(struct inode * inode, struct file * file)
+{
+ struct gendisk *disk = inode->i_bdev->bd_disk;
+ struct cdrom_info *info;
+ ide_drive_t *drive;
+ int rc = -ENOMEM;
+
+ if (!(info = ide_cd_get(disk)))
+ return -ENXIO;
+
+ drive = info->drive;
+
+ drive->usage++;
+
+ if (!info->buffer)
+ info->buffer = kmalloc(SECTOR_BUFFER_SIZE,
+ GFP_KERNEL|__GFP_REPEAT);
+ if (!info->buffer || (rc = cdrom_open(&info->devinfo, inode, file)))
+ drive->usage--;
+
+ if (rc < 0)
+ ide_cd_put(info);
+
+ return rc;
+}
+
+static int idecd_release(struct inode * inode, struct file * file)
+{
+ struct gendisk *disk = inode->i_bdev->bd_disk;
+ struct cdrom_info *info = ide_cd_g(disk);
+ ide_drive_t *drive = info->drive;
+
+ cdrom_release (&info->devinfo, file);
+ drive->usage--;
+
+ ide_cd_put(info);
+
+ return 0;
+}
+
+static int idecd_ioctl (struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct block_device *bdev = inode->i_bdev;
+ struct cdrom_info *info = ide_cd_g(bdev->bd_disk);
+ int err;
+
+ err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg);
+ if (err == -EINVAL)
+ err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg);
+
+ return err;
+}
+
+static int idecd_media_changed(struct gendisk *disk)
+{
+ struct cdrom_info *info = ide_cd_g(disk);
+ return cdrom_media_changed(&info->devinfo);
+}
+
+static int idecd_revalidate_disk(struct gendisk *disk)
+{
+ struct cdrom_info *info = ide_cd_g(disk);
+ struct request_sense sense;
+ cdrom_read_toc(info->drive, &sense);
+ return 0;
+}
+
+static struct block_device_operations idecd_ops = {
+ .owner = THIS_MODULE,
+ .open = idecd_open,
+ .release = idecd_release,
+ .ioctl = idecd_ioctl,
+ .media_changed = idecd_media_changed,
+ .revalidate_disk= idecd_revalidate_disk
+};
+
+/* options */
+static char *ignore = NULL;
+
+module_param(ignore, charp, 0400);
+MODULE_DESCRIPTION("ATAPI CD-ROM Driver");
+
+static int ide_cdrom_attach (ide_drive_t *drive)
+{
+ struct cdrom_info *info;
+ struct gendisk *g;
+ struct request_sense sense;
+
+ if (!strstr("ide-cdrom", drive->driver_req))
+ goto failed;
+ if (!drive->present)
+ goto failed;
+ if (drive->media != ide_cdrom && drive->media != ide_optical)
+ goto failed;
+ /* skip drives that we were told to ignore */
+ if (ignore != NULL) {
+ if (strstr(ignore, drive->name)) {
+ printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name);
+ goto failed;
+ }
+ }
+ if (drive->scsi) {
+ printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
+ goto failed;
+ }
+ info = (struct cdrom_info *) kmalloc (sizeof (struct cdrom_info), GFP_KERNEL);
+ if (info == NULL) {
+ printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name);
+ goto failed;
+ }
+
+ g = alloc_disk(1 << PARTN_BITS);
+ if (!g)
+ goto out_free_cd;
+
+ ide_init_disk(g, drive);
+
+ if (ide_register_subdriver(drive, &ide_cdrom_driver)) {
+ printk(KERN_ERR "%s: Failed to register the driver with ide.c\n",
+ drive->name);
+ goto out_put_disk;
+ }
+ memset(info, 0, sizeof (struct cdrom_info));
+
+ kref_init(&info->kref);
+
+ info->drive = drive;
+ info->driver = &ide_cdrom_driver;
+ info->disk = g;
+
+ g->private_data = &info->driver;
+
+ drive->driver_data = info;
+
+ DRIVER(drive)->busy++;
+ g->minors = 1;
+ snprintf(g->devfs_name, sizeof(g->devfs_name),
+ "%s/cd", drive->devfs_name);
+ g->driverfs_dev = &drive->gendev;
+ g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
+ if (ide_cdrom_setup(drive)) {
+ struct cdrom_device_info *devinfo = &info->devinfo;
+ DRIVER(drive)->busy--;
+ ide_unregister_subdriver(drive);
+ if (info->buffer != NULL)
+ kfree(info->buffer);
+ if (info->toc != NULL)
+ kfree(info->toc);
+ if (info->changer_info != NULL)
+ kfree(info->changer_info);
+ if (devinfo->handle == drive && unregister_cdrom(devinfo))
+ printk (KERN_ERR "%s: ide_cdrom_cleanup failed to unregister device from the cdrom driver.\n", drive->name);
+ kfree(info);
+ drive->driver_data = NULL;
+ goto failed;
+ }
+ DRIVER(drive)->busy--;
+
+ cdrom_read_toc(drive, &sense);
+ g->fops = &idecd_ops;
+ g->flags |= GENHD_FL_REMOVABLE;
+ add_disk(g);
+ return 0;
+
+out_put_disk:
+ put_disk(g);
+out_free_cd:
+ kfree(info);
+failed:
+ return 1;
+}
+
+static void __exit ide_cdrom_exit(void)
+{
+ ide_unregister_driver(&ide_cdrom_driver);
+}
+
+static int ide_cdrom_init(void)
+{
+ ide_register_driver(&ide_cdrom_driver);
+ return 0;
+}
+
+module_init(ide_cdrom_init);
+module_exit(ide_cdrom_exit);
+MODULE_LICENSE("GPL");