1998-11-30 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>

	Clean up linux emulation code to make it architecture-independent
	as much as possible.

	* linux: Renamed from linuxdev.
	* Makefile.in (objfiles): Add linux.o instead of linuxdev.o.
	(MAKE): New variable. Used for the linux.o target.
	* configure.in: Add AC_CHECK_TOOL(MAKE, make).
	* i386/i386/spl.h: Include <i386/ipl.h>, for compatibility with
	OSF Mach 3.0. Suggested by Elgin Lee <ehl@funghi.com>.
	* linux/src: Renamed from linux/linux.
	* linux/dev: Renamed from linux/mach.
	* linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h,
	instead of mach/include/linux/autoconf.h.
	* Makefile.in (all): Target ../linux.o instead of ../linuxdev.o.
	* linux/dev/drivers/block/genhd.c: Include <machine/spl.h> instead
	of <i386/ipl.h>.
	* linux/dev/drivers/net/auto_irq.c: Remove unneeded header files,
	<i386/ipl.h> and <i386/pic.h>.
	* linux/dev/init/main.c: Many i386-dependent codes moved to ...
	* linux/dev/arch/i386/irq.c: ... here.
	* linux/dev/arch/i386/setup.c: New file.
	* linux/dev/arch/i386/linux_emul.h: Likewise.
	* linux/dev/arch/i386/glue/timer.c: Merged into sched.c.
	* linux/dev/arch/i386/glue/sched.c: Include <machine/spl.h> instead
	of <i386/ipl.h>, and moved to ...
	* linux/dev/kernel/sched.c: ... here.
	* linux/dev/arch/i386/glue/block.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/blocl.c: ... here.
	* linux/dev/arch/i386/glue/net.c: Include <machine/spl.h> and
	<linux_emul.h>, instead of i386-dependent header files, and
	moved to ...
	* linux/dev/glue/net.c: ... here.
	* linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ...
	* linux/dev/glue/misc.c: ... here.
	* linux/dev/arch/i386/glue/kmem.c: Moved to ...
	* linux/dev/glue/kmem.c: ... here.

1 files changed, 2775 insertions, 0 deletions

diff --git a/linux/src/drivers/block/ide-cd.c b/linux/src/drivers/block/ide-cd.c
new file mode 100644
index 0000000..825d942
--- /dev/null
+++ b/linux/src/drivers/block/ide-cd.c
@@ -0,0 +1,2775 @@
+/* #define VERBOSE_IDE_CD_ERRORS 1 */
+/*
+ * linux/drivers/block/ide-cd.c
+ * ATAPI cd-rom driver.  To be used with ide.c.
+ * See Documentation/cdrom/ide-cd for usage information.
+ *
+ * Copyright (C) 1994, 1995, 1996  scott snyder  <snyder@fnald0.fnal.gov>
+ * Copyright (C) 1996, 1997  Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1998  Jens Axboe and Chris Zwilling
+ *
+ * May be copied or modified under the terms of the GNU General Public License
+ * see linux/COPYING for more information.
+ *
+ * 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@netcom.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.
+ *
+ * 3.19  Nov 5, 1996  -- New ide-cd maintainer:
+ *                                 Erik B. Andersen <andersee@debian.org>
+ * 3.20  Jan 13,1997  -- Bug Fixes:
+ *                        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 
+ * 3.21  Jun 16,1997  -- Add work-around for GCD-R580B
+ *
+ * 3.22  Nov 13, 1998 -- New ide-cd maintainers:
+ *                           Jens Axboe <axboe@image.dk>
+ *                           Chris Zwilling <chris@cloudnet.com>
+ *
+ * NOTE: Direct audio reads will only work on some types of drive.
+ * So far, i've received reports of success for Sony and Toshiba drives.
+ *
+ * ALSO NOTE:
+ *
+ *  The ide cdrom driver has undergone extensive changes for the
+ *       latest development kernel.  If you wish to add new features to
+ *       this driver, make your changes to the latest version in the
+ *       development kernel.  Only Bug fixes will be accepted for this
+ *       version.
+ *
+ *       For those wishing to work on this driver, please be sure you download
+ *       and comply with the latest ATAPI standard.  This document can be
+ *       obtained by anonymous ftp from fission.dt.wdc.com in directory:
+ *       /pub/standards/atapi/spec/SFF8020-r2.6/PDF/8020r26.pdf
+ *
+ */
+
+
+/***************************************************************************/
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/timer.h>
+#include <linux/malloc.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/errno.h>
+#include <linux/hdreg.h>
+#include <linux/cdrom.h>
+#include <linux/ucdrom.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/byteorder.h>
+#include <asm/segment.h>
+#include <asm/unaligned.h>
+
+#include "ide.h"
+
+
+
+/* Turn this on to have the driver print out the meanings of the
+   ATAPI error codes.  This will use up additional kernel-space
+   memory, though. */
+
+#ifndef VERBOSE_IDE_CD_ERRORS
+#define VERBOSE_IDE_CD_ERRORS 0
+#endif
+
+
+/* Turning this on will remove code to work around various nonstandard
+   ATAPI implementations.  If you know your drive follows the standard,
+   this will give you a slightly smaller kernel. */
+
+#ifndef STANDARD_ATAPI
+#define STANDARD_ATAPI 0
+#endif
+
+
+/* Turning this on will disable the door-locking functionality.
+   This is apparently needed for supermount. */
+
+#ifndef NO_DOOR_LOCKING
+#define NO_DOOR_LOCKING 0
+#endif
+
+
+/* Size of buffer to allocate, in blocks, for audio reads. */
+
+#ifndef CDROM_NBLOCKS_BUFFER
+#define CDROM_NBLOCKS_BUFFER 8
+#endif
+
+
+/************************************************************************/
+
+#define SECTOR_SIZE 512
+#define SECTOR_BITS 9
+#define SECTORS_PER_FRAME (CD_FRAMESIZE / SECTOR_SIZE)
+
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+
+/* special command codes for strategy routine. */
+#define PACKET_COMMAND        4315
+#define REQUEST_SENSE_COMMAND 4316
+#define RESET_DRIVE_COMMAND   4317
+
+/* Some ATAPI command opcodes (just like SCSI).
+   (Some other cdrom-specific codes are in cdrom.h.) */
+#define TEST_UNIT_READY         0x00
+#define REQUEST_SENSE           0x03
+#define START_STOP              0x1b
+#define ALLOW_MEDIUM_REMOVAL    0x1e
+#define READ_CAPACITY		0x25
+#define READ_10                 0x28
+#define MODE_SENSE_10           0x5a
+#define MODE_SELECT_10          0x55
+#define READ_CD                 0xbe
+
+#define LOAD_UNLOAD             0xa6
+
+
+/* ATAPI sense keys (mostly copied from scsi.h). */
+
+#define NO_SENSE                0x00
+#define RECOVERED_ERROR         0x01
+#define NOT_READY               0x02
+#define MEDIUM_ERROR            0x03
+#define HARDWARE_ERROR          0x04
+#define ILLEGAL_REQUEST         0x05
+#define UNIT_ATTENTION          0x06
+#define DATA_PROTECT            0x07
+#define ABORTED_COMMAND         0x0b
+#define MISCOMPARE              0x0e
+
+/* We want some additional flags for cd-rom drives.
+   To save space in the ide_drive_t struct, use some fields which
+   doesn't make sense for cd-roms -- `bios_sect' and `bios_head'. */
+
+/* Configuration flags.  These describe the capabilities of the drive.
+   They generally do not change after initialization, unless we learn
+   more about the drive from stuff failing. */
+struct ide_cd_config_flags {
+	__u8 drq_interrupt    : 1; /* Device sends an interrupt when ready
+				      for a packet command. */
+	__u8 no_doorlock      : 1; /* Drive cannot lock the door. */
+#if ! STANDARD_ATAPI
+	__u8 old_readcd       : 1; /* Drive uses old READ CD opcode. */
+	__u8 playmsf_as_bcd   : 1; /* PLAYMSF command takes BCD args. */
+	__u8 tocaddr_as_bcd   : 1; /* TOC addresses are in BCD. */
+	__u8 toctracks_as_bcd : 1; /* TOC track numbers are in BCD. */
+	__u8 subchan_as_bcd   : 1; /* Subchannel info is in BCD. */
+#endif  /* not STANDARD_ATAPI */
+	__u8 reserved         : 1;
+};
+#define CDROM_CONFIG_FLAGS(drive) ((struct ide_cd_config_flags *)&((drive)->bios_sect))
+
+ 
+/* State flags.  These give information about the current state of the
+   drive, and will change during normal operation. */
+struct ide_cd_state_flags {
+	__u8 media_changed : 1; /* Driver has noticed a media change. */
+	__u8 toc_valid     : 1; /* Saved TOC information is current. */
+	__u8 door_locked   : 1; /* We think that the drive door is locked. */
+	__u8 eject_on_close: 1; /* Drive should eject when device is closed. */
+	__u8 sanyo_slot    : 2; /* Sanyo 3 CD changer support */
+	__u8 reserved      : 2;
+};
+#define CDROM_STATE_FLAGS(drive)  ((struct ide_cd_state_flags *)&((drive)->bios_head))
+
+
+#define SECTOR_BUFFER_SIZE CD_FRAMESIZE
+
+
+
+/****************************************************************************
+ * Routines to read and write data from/to the drive, using
+ * the routines input_ide_data() and output_ide_data() from ide.c.
+ *
+ * These routines will round up any request for an odd number of bytes,
+ * so if an odd bytecount is specified, be sure that there's at least one
+ * extra byte allocated for the buffer.
+ */
+
+
+static inline
+void cdrom_in_bytes (ide_drive_t *drive, void *buffer, uint bytecount)
+{
+	++bytecount;
+	ide_input_data (drive, buffer, bytecount / 4);
+	if ((bytecount & 0x03) >= 2) {
+		insw (IDE_DATA_REG, ((byte *)buffer) + (bytecount & ~0x03), 1);
+	}
+}
+
+
+static inline
+void cdrom_out_bytes (ide_drive_t *drive, void *buffer, uint bytecount)
+{
+	++bytecount;
+	ide_output_data (drive, buffer, bytecount / 4);
+	if ((bytecount & 0x03) >= 2) {
+		outsw (IDE_DATA_REG,
+		       ((byte *)buffer) + (bytecount & ~0x03), 1);
+	}
+}
+
+
+
+/****************************************************************************
+ * Descriptions of ATAPI error codes.
+ */
+
+#define ARY_LEN(a) ((sizeof(a) / sizeof(a[0])))
+
+#if VERBOSE_IDE_CD_ERRORS
+
+/* From Table 124 of the ATAPI 1.2 spec. */
+
+char *sense_key_texts[16] = {
+	"No sense data",
+	"Recovered error",
+	"Not ready",
+	"Medium error",
+	"Hardware error",
+	"Illegal request",
+	"Unit attention",
+	"Data protect",
+	"(reserved)",
+	"(reserved)",
+	"(reserved)",
+	"Aborted command",
+	"(reserved)",
+	"(reserved)",
+	"Miscompare",
+	"(reserved)",
+};
+
+
+/* From Table 125 of the ATAPI 1.2 spec. */
+
+struct {
+	short asc_ascq;
+	char *text;
+} sense_data_texts[] = {
+	{ 0x0000, "No additional sense information" },
+	{ 0x0011, "Audio play operation in progress" },
+	{ 0x0012, "Audio play operation paused" },
+	{ 0x0013, "Audio play operation successfully completed" },
+	{ 0x0014, "Audio play operation stopped due to error" },
+	{ 0x0015, "No current audio status to return" },
+
+	{ 0x0200, "No seek complete" },
+
+	{ 0x0400, "Logical unit not ready - cause not reportable" },
+	{ 0x0401,
+	  "Logical unit not ready - in progress (sic) of becoming ready" },
+	{ 0x0402, "Logical unit not ready - initializing command required" },
+	{ 0x0403, "Logical unit not ready - manual intervention required" },
+
+	{ 0x0600, "No reference position found" },
+
+	{ 0x0900, "Track following error" },
+	{ 0x0901, "Tracking servo failure" },
+	{ 0x0902, "Focus servo failure" },
+	{ 0x0903, "Spindle servo failure" },
+
+	{ 0x1100, "Unrecovered read error" },
+	{ 0x1106, "CIRC unrecovered error" },
+
+	{ 0x1500, "Random positioning error" },
+	{ 0x1501, "Mechanical positioning error" },
+	{ 0x1502, "Positioning error detected by read of medium" },
+
+	{ 0x1700, "Recovered data with no error correction applied" },
+	{ 0x1701, "Recovered data with retries" },
+	{ 0x1702, "Recovered data with positive head offset" },
+	{ 0x1703, "Recovered data with negative head offset" },
+	{ 0x1704, "Recovered data with retries and/or CIRC applied" },
+	{ 0x1705, "Recovered data using previous sector ID" },
+
+	{ 0x1800, "Recovered data with error correction applied" },
+	{ 0x1801, "Recovered data with error correction and retries applied" },
+	{ 0x1802, "Recovered data - the data was auto-reallocated" },
+	{ 0x1803, "Recovered data with CIRC" },
+	{ 0x1804, "Recovered data with L-EC" },
+	{ 0x1805, "Recovered data - recommend reassignment" },
+	{ 0x1806, "Recovered data - recommend rewrite" },
+
+	{ 0x1a00, "Parameter list length error" },
+
+	{ 0x2000, "Invalid command operation code" },
+
+	{ 0x2100, "Logical block address out of range" },
+
+	{ 0x2400, "Invalid field in command packet" },
+
+	{ 0x2600, "Invalid field in parameter list" },
+	{ 0x2601, "Parameter not supported" },
+	{ 0x2602, "Parameter value invalid" },
+	{ 0x2603, "Threshold parameters not supported" },
+
+	{ 0x2800, "Not ready to ready transition, medium may have changed" },
+
+	{ 0x2900, "Power on, reset or bus device reset occurred" },
+
+	{ 0x2a00, "Parameters changed" },
+	{ 0x2a01, "Mode parameters changed" },
+
+	{ 0x3000, "Incompatible medium installed" },
+	{ 0x3001, "Cannot read medium - unknown format" },
+	{ 0x3002, "Cannot read medium - incompatible format" },
+
+	{ 0x3700, "Rounded parameter" },
+
+	{ 0x3900, "Saving parameters not supported" },
+
+	{ 0x3a00, "Medium not present" },
+
+	{ 0x3f00, "ATAPI CD-ROM drive operating conditions have changed" },
+	{ 0x3f01, "Microcode has been changed" },
+	{ 0x3f02, "Changed operating definition" },
+	{ 0x3f03, "Inquiry data has changed" },
+
+	{ 0x4000, "Diagnostic failure on component (ASCQ)" },
+
+	{ 0x4400, "Internal ATAPI CD-ROM drive failure" },
+
+	{ 0x4e00, "Overlapped commands attempted" },
+
+	{ 0x5300, "Media load or eject failed" },
+	{ 0x5302, "Medium removal prevented" },
+
+	{ 0x5700, "Unable to recover table of contents" },
+
+	{ 0x5a00, "Operator request or state change input (unspecified)" },
+	{ 0x5a01, "Operator medium removal request" },
+
+	{ 0x5b00, "Threshold condition met" },
+
+	{ 0x5c00, "Status change" },
+
+	{ 0x6300, "End of user area encountered on this track" },
+
+	{ 0x6400, "Illegal mode for this track" },
+
+	{ 0xbf00, "Loss of streaming" },
+};
+#endif
+
+
+
+/****************************************************************************
+ * Generic packet command support and error handling routines.
+ */
+
+
+static
+void cdrom_analyze_sense_data (ide_drive_t *drive, 
+			       struct atapi_request_sense *reqbuf,
+			       struct packet_command *failed_command)
+{
+	/* Don't print not ready or unit attention errors for READ_SUBCHANNEL.
+	   Workman (and probably other programs) uses this command to poll
+	   the drive, and we don't want to fill the syslog
+	   with useless errors. */
+	if (failed_command &&
+	    failed_command->c[0] == SCMD_READ_SUBCHANNEL &&
+	    (reqbuf->sense_key == NOT_READY ||
+	     reqbuf->sense_key == UNIT_ATTENTION))
+		return;
+
+#if VERBOSE_IDE_CD_ERRORS
+	{
+		int i;
+		char *s;
+		char buf[80];
+
+		printk ("ATAPI device %s:\n", drive->name);
+
+		printk ("  Error code: 0x%02x\n", reqbuf->error_code);
+
+		if (reqbuf->sense_key >= 0 &&
+		    reqbuf->sense_key < ARY_LEN (sense_key_texts))
+			s = sense_key_texts[reqbuf->sense_key];
+		else
+			s = "(bad sense key)";
+
+		printk ("  Sense key: 0x%02x - %s\n", reqbuf->sense_key, s);
+
+		if (reqbuf->asc == 0x40) {
+			sprintf (buf, "Diagnostic failure on component 0x%02x",
+				 reqbuf->ascq);
+			s = buf;
+		} else {
+			int lo, hi;
+			int key = (reqbuf->asc << 8);
+			if ( ! (reqbuf->ascq >= 0x80 && reqbuf->ascq <= 0xdd) )
+				key |= reqbuf->ascq;
+
+			lo = 0;
+			hi = ARY_LEN (sense_data_texts);
+			s = NULL;
+
+			while (hi > lo) {
+				int mid = (lo + hi) / 2;
+				if (sense_data_texts[mid].asc_ascq == 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 (reqbuf->asc > 0x80)
+				s = "(vendor-specific error)";
+			else
+				s = "(reserved error code)";
+		}
+
+		printk ("  Additional sense data: 0x%02x, 0x%02x  - %s\n",
+			reqbuf->asc, reqbuf->ascq, s);
+
+		if (failed_command != NULL) {
+			printk ("  Failed packet command: ");
+			for (i=0; i<sizeof (failed_command->c); i++)
+				printk ("%02x ", failed_command->c[i]);
+			printk ("\n");
+		}
+
+		if (reqbuf->sense_key == ILLEGAL_REQUEST &&
+		    (reqbuf->sense_key_specific[0] & 0x80) != 0) {
+			printk ("  Error in %s byte %d",
+				(reqbuf->sense_key_specific[0] & 0x40) != 0
+				? "command packet"
+				: "command data",
+				(reqbuf->sense_key_specific[1] << 8) +
+				reqbuf->sense_key_specific[2]);
+
+			if ((reqbuf->sense_key_specific[0] & 0x40) != 0) {
+				printk (" bit %d",
+					reqbuf->sense_key_specific[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 (reqbuf->sense_key == UNIT_ATTENTION ||
+	    (reqbuf->sense_key == NOT_READY && (reqbuf->asc == 4 ||
+						reqbuf->asc == 0x3a)))
+		return;
+
+	printk ("%s: code: 0x%02x  key: 0x%02x  asc: 0x%02x  ascq: 0x%02x\n",
+		drive->name,
+		reqbuf->error_code, reqbuf->sense_key,
+		reqbuf->asc, reqbuf->ascq);
+#endif /* not VERBOSE_IDE_CD_ERRORS */
+}
+
+
+/* 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 != rq->bh->b_data) {
+		int n = (rq->buffer - rq->bh->b_data) / SECTOR_SIZE;
+		rq->buffer = rq->bh->b_data;
+		rq->nr_sectors += n;
+		rq->sector -= n;
+	}
+	rq->current_nr_sectors = rq->bh->b_size >> SECTOR_BITS;
+}
+
+
+static void cdrom_queue_request_sense (ide_drive_t *drive, 
+				       struct semaphore *sem,
+				       struct atapi_request_sense *reqbuf,
+				       struct packet_command *failed_command)
+{
+	struct request *rq;
+	struct packet_command *pc;
+	int len;
+
+	/* If the request didn't explicitly specify where
+	   to put the sense data, use the statically allocated structure. */
+	if (reqbuf == NULL)
+		reqbuf = &drive->cdrom_info.sense_data;
+
+	/* Make up a new request to retrieve sense information. */
+
+	pc = &HWIF(drive)->request_sense_pc;
+	memset (pc, 0, sizeof (*pc));
+
+	/* The request_sense structure has an odd number of (16-bit) words,
+	   which won't work well with 32-bit transfers.  However, we don't care
+	   about the last two bytes, so just truncate the structure down
+	   to an even length. */
+	len = sizeof (*reqbuf) / 4;
+	len *= 4;
+
+	pc->c[0] = REQUEST_SENSE;
+	pc->c[4] = len;
+	pc->buffer = (char *)reqbuf;
+	pc->buflen = len;
+	pc->sense_data = (struct atapi_request_sense *)failed_command;
+
+	/* stuff the sense request in front of our current request */
+
+	rq = &HWIF(drive)->request_sense_request;
+	ide_init_drive_cmd (rq);
+	rq->cmd = REQUEST_SENSE_COMMAND;
+	rq->buffer = (char *)pc;
+	rq->sem = sem;
+	(void) ide_do_drive_cmd (drive, rq, ide_preempt);
+}
+
+
+static void cdrom_end_request (int uptodate, ide_drive_t *drive)
+{
+	struct request *rq = HWGROUP(drive)->rq;
+
+	if (rq->cmd == REQUEST_SENSE_COMMAND && uptodate) {
+		struct packet_command *pc = (struct packet_command *)
+			                      rq->buffer;
+		cdrom_analyze_sense_data (drive,
+					  (struct atapi_request_sense *)
+					  	(pc->buffer - pc->c[4]), 
+					  (struct packet_command *)
+					  	pc->sense_data);
+	}
+
+	ide_end_request (uptodate, HWGROUP(drive));
+}
+
+
+/* Mark that we've seen a media change, and invalidate our internal
+   buffers. */
+static void cdrom_saw_media_change (ide_drive_t *drive)
+{
+	CDROM_STATE_FLAGS (drive)->media_changed = 1;
+	CDROM_STATE_FLAGS (drive)->toc_valid = 0;
+	drive->cdrom_info.nsectors_buffered = 0;
+}
+
+
+/* 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, cmd;
+
+	/* Check for errors. */
+	stat = GET_STAT();
+	*stat_ret = stat;
+
+	if (OK_STAT (stat, good_stat, BAD_R_STAT))
+		return 0;
+
+	/* Got an error. */
+	err = IN_BYTE (IDE_ERROR_REG);
+	sense_key = err >> 4;
+
+	if (rq == NULL)
+		printk ("%s : missing request in cdrom_decode_status\n",
+			drive->name);
+	else {
+		cmd = rq->cmd;
+
+		if (cmd == REQUEST_SENSE_COMMAND) {
+			/* We got an error trying to get sense info
+			   from the drive (probably while trying
+			   to recover from a former error).  Just give up. */
+
+			struct packet_command *pc = (struct packet_command *)
+				                      rq->buffer;
+			pc->stat = 1;
+			cdrom_end_request (1, drive);
+			ide_error (drive, "request sense failure", stat);
+			return 1;
+
+		} else if (cmd == PACKET_COMMAND) {
+			/* All other functions, except for READ. */
+
+			struct packet_command *pc = (struct packet_command *)
+				                      rq->buffer;
+			struct semaphore *sem = NULL;
+
+			/* Check for tray open. */
+			if (sense_key == NOT_READY) {
+				cdrom_saw_media_change (drive);
+
+				/* Print an error message to the syslog.
+				   Exception: don't print anything if this
+				   is a read subchannel command.  This is
+				   because workman constantly polls the drive
+				   with this command, and we don't want
+				   to uselessly fill up the syslog. */
+				if (pc->c[0] != SCMD_READ_SUBCHANNEL)
+					printk ("%s : tray open or drive not ready\n",
+						drive->name);
+			} else if (sense_key == UNIT_ATTENTION) {
+				/* Check for media change. */
+				cdrom_saw_media_change (drive);
+				printk ("%s: media changed\n", drive->name);
+			} else {
+				/* Otherwise, print an error. */
+				ide_dump_status (drive, "packet command error",
+						 stat);
+			}
+			
+			/* Set the error flag and complete the request.
+			   Then, if we have a CHECK CONDITION status,
+			   queue a request sense command.  We must be careful,
+			   though: we don't want the thread in
+			   cdrom_queue_packet_command to wake up until
+			   the request sense has completed.  We do this
+			   by transferring the semaphore from the packet
+			   command request to the request sense request. */
+
+			if ((stat & ERR_STAT) != 0) {
+				sem = rq->sem;
+				rq->sem = NULL;
+			}
+
+			pc->stat = 1;
+			cdrom_end_request (1, drive);
+
+			if ((stat & ERR_STAT) != 0)
+				cdrom_queue_request_sense (drive, sem,
+							   pc->sense_data, pc);
+		} else {
+			/* Handle errors from READ requests. */
+
+			if (sense_key == NOT_READY) {
+				/* Tray open. */
+				cdrom_saw_media_change (drive);
+
+				/* Fail the request. */
+				printk ("%s : tray open\n", drive->name);
+				cdrom_end_request (0, drive);
+			} 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)
+					cdrom_end_request (0, drive);
+			} 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);
+				cdrom_end_request (0, drive);
+			} 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. */
+				cdrom_end_request (0, drive);
+			}
+
+			/* If we got a CHECK_CONDITION status,
+			   queue a request sense command. */
+			if ((stat & ERR_STAT) != 0)
+				cdrom_queue_request_sense (drive,
+							   NULL, NULL, NULL);
+		}
+	}
+
+	/* Retry, or handle the next request. */
+	return 1;
+}
+
+
+/* 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 int cdrom_start_packet_command (ide_drive_t *drive, int xferlen,
+				       ide_handler_t *handler)
+{
+	/* Wait for the controller to be idle. */
+	if (ide_wait_stat (drive, 0, BUSY_STAT, WAIT_READY)) return 1;
+
+	/* Set up the controller registers. */
+	OUT_BYTE (0, IDE_FEATURE_REG);
+	OUT_BYTE (0, IDE_NSECTOR_REG);
+	OUT_BYTE (0, IDE_SECTOR_REG);
+
+	OUT_BYTE (xferlen & 0xff, IDE_LCYL_REG);
+	OUT_BYTE (xferlen >> 8  , IDE_HCYL_REG);
+	OUT_BYTE (drive->ctl, IDE_CONTROL_REG);
+
+	if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) {
+		ide_set_handler (drive, handler, WAIT_CMD);
+		OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* packet command */
+	} else {
+		OUT_BYTE (WIN_PACKETCMD, IDE_COMMAND_REG); /* packet command */
+		(*handler) (drive);
+	}
+
+	return 0;
+}
+
+
+/* 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. */
+static int cdrom_transfer_packet_command (ide_drive_t *drive,
+                                          char *cmd_buf, int cmd_len,
+					  ide_handler_t *handler)
+{
+	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. */
+		int stat_dum;
+
+		/* Check for errors. */
+		if (cdrom_decode_status (drive, DRQ_STAT, &stat_dum)) return 1;
+	} else {
+		/* Otherwise, we must wait for DRQ to get set. */
+		if (ide_wait_stat (drive, DRQ_STAT, BUSY_STAT, WAIT_READY))
+			return 1;
+	}
+
+	/* Arm the interrupt handler. */
+	ide_set_handler (drive, handler, WAIT_CMD);
+
+	/* Send the command to the device. */
+	cdrom_out_bytes (drive, cmd_buf, cmd_len);
+
+	return 0;
+}
+
+
+
+/****************************************************************************
+ * 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->cdrom_info;
+
+	/* Number of sectors to read into the buffer. */
+	int sectors_to_buffer = MIN (sectors_to_transfer,
+				     (SECTOR_BUFFER_SIZE >> SECTOR_BITS) -
+				       info->nsectors_buffered);
+
+	char *dest;
+
+	/* If we don't yet have a sector buffer, try to allocate one.
+	   If we can't get one atomically, it's not fatal -- we'll just throw
+	   the data away rather than caching it. */
+	if (info->sector_buffer == NULL) {
+		info->sector_buffer = (char *) kmalloc (SECTOR_BUFFER_SIZE,
+							GFP_ATOMIC);
+
+		/* If we couldn't get a buffer,
+		   don't try to buffer anything... */
+		if (info->sector_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->sector_buffer + info->nsectors_buffered * SECTOR_SIZE;
+	while (sectors_to_buffer > 0) {
+		cdrom_in_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) {
+		char dum[SECTOR_SIZE];
+		cdrom_in_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)
+{
+	ireason &= 3;
+	if (ireason == 2) return 0;
+
+	if (ireason == 0) {
+		/* Whoops... The drive is expecting to receive data from us! */
+		printk ("%s: cdrom_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;
+			cdrom_out_bytes (drive, &dum, sizeof (dum));
+			len -= sizeof (dum);
+		}
+	} else {
+		/* Drive wants a command packet, or invalid ireason... */
+		printk ("%s: cdrom_read_intr: bad interrupt reason %d\n",
+			drive->name, ireason);
+	}
+
+	cdrom_end_request (0, drive);
+	return -1;
+}
+
+
+/*
+ * Interrupt routine.  Called when a read request has completed.
+ */
+static void cdrom_read_intr (ide_drive_t *drive)
+{
+	int stat;
+	int ireason, len, sectors_to_transfer, nskip;
+
+	struct request *rq = HWGROUP(drive)->rq;
+
+	/* Check for errors. */
+	if (cdrom_decode_status (drive, 0, &stat)) return;
+
+	/* Read the interrupt reason and the transfer length. */
+	ireason = IN_BYTE (IDE_NSECTOR_REG);
+	len = IN_BYTE (IDE_LCYL_REG) + 256 * IN_BYTE (IDE_HCYL_REG);
+
+	/* 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 ("%s: cdrom_read_intr: data underrun (%ld blocks)\n",
+				drive->name, rq->current_nr_sectors);
+			cdrom_end_request (0, drive);
+		} else
+			cdrom_end_request (1, drive);
+
+		return;
+	}
+
+	/* Check that the drive is expecting to do the same thing we are. */
+	if (cdrom_read_check_ireason (drive, len, ireason)) return;
+
+	/* 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 ("%s: cdrom_read_intr: Bad transfer size %d\n",
+			drive->name, len);
+		printk ("  This drive is not supported by this version of the driver\n");
+		cdrom_end_request (0, drive);
+		return;
+	}
+
+	/* 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 ((int)(rq->current_nr_sectors -
+			   (rq->bh->b_size >> SECTOR_BITS)),
+		     sectors_to_transfer);
+
+	while (nskip > 0) {
+		/* We need to throw away a sector. */
+		char dum[SECTOR_SIZE];
+		cdrom_in_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 > 0)
+			cdrom_end_request (1, drive);
+
+		/* 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 (sectors_to_transfer,
+					     rq->current_nr_sectors);
+
+			/* Read this_transfer sectors
+			   into the current buffer. */
+			while (this_transfer > 0) {
+				cdrom_in_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, WAIT_CMD);
+}
+
+
+/*
+ * 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->cdrom_info;
+	struct request *rq = HWGROUP(drive)->rq;
+
+	/* Can't do anything if there's no buffer. */
+	if (info->sector_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 (1, drive);
+
+		memcpy (rq->buffer,
+			info->sector_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 (1, drive);
+		return -1;
+	}
+
+	/* Move on to the next buffer if needed. */
+	if (rq->current_nr_sectors == 0)
+		cdrom_end_request (1, drive);
+
+	/* 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 < (rq->bh->b_size >> SECTOR_BITS) &&
+	    (rq->sector % SECTORS_PER_FRAME) != 0) {
+		printk ("%s: cdrom_read_from_buffer: buffer botch (%ld)\n",
+			drive->name, rq->sector);
+		cdrom_end_request (0, drive);
+		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 void cdrom_start_read_continuation (ide_drive_t *drive)
+{
+	struct packet_command pc;
+	struct request *rq = HWGROUP(drive)->rq;
+
+	int nsect, sector, nframes, frame, nskip;
+
+	/* Number of sectors to transfer. */
+	nsect = rq->nr_sectors;
+
+#if !STANDARD_ATAPI
+	if (nsect > drive->cdrom_info.max_sectors)
+		nsect = drive->cdrom_info.max_sectors;
+#endif /* not STANDARD_ATAPI */
+
+	/* Starting sector. */
+	sector = rq->sector;
+
+	/* 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 = (sector % SECTORS_PER_FRAME);
+	if (nskip > 0) {
+		/* Sanity check... */
+		if (rq->current_nr_sectors !=
+		    (rq->bh->b_size >> SECTOR_BITS)) {
+			printk ("%s: cdrom_start_read_continuation: buffer botch (%ld)\n",
+				drive->name, rq->current_nr_sectors);
+			cdrom_end_request (0, drive);
+			return;
+		}
+
+		sector -= nskip;
+		nsect += nskip;
+		rq->current_nr_sectors += nskip;
+	}
+
+	/* Convert from sectors to cdrom blocks, rounding up the transfer
+	   length if needed. */
+	nframes = (nsect + SECTORS_PER_FRAME-1) / SECTORS_PER_FRAME;
+	frame = sector / SECTORS_PER_FRAME;
+
+	/* Largest number of frames was can transfer at once is 64k-1. */
+	nframes = MIN (nframes, 65535);
+
+	/* Set up the command */
+	memset (&pc.c, 0, sizeof (pc.c));
+	pc.c[0] = READ_10;
+	pc.c[7] = (nframes >> 8);
+	pc.c[8] = (nframes & 0xff);
+	put_unaligned(htonl (frame), (unsigned int *) &pc.c[2]);
+
+	/* Send the command to the drive and return. */
+	(void) cdrom_transfer_packet_command (drive, pc.c, sizeof (pc.c),
+					      &cdrom_read_intr);
+}
+
+
+/*
+ * Start a read request from the CD-ROM.
+ */
+static void cdrom_start_read (ide_drive_t *drive, unsigned int block)
+{
+	struct request *rq = HWGROUP(drive)->rq;
+	int minor = MINOR (rq->rq_dev);
+
+	/* If the request is relative to a partition, fix it up to refer to the
+	   absolute address.  */
+	if ((minor & PARTN_MASK) != 0) {
+		rq->sector = block;
+		minor &= ~PARTN_MASK;
+		rq->rq_dev = MKDEV (MAJOR(rq->rq_dev), minor);
+	}
+
+	/* 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;
+
+	/* Clear the local sector buffer. */
+	drive->cdrom_info.nsectors_buffered = 0;
+
+	/* Start sending the read request to the drive. */
+	cdrom_start_packet_command (drive, 32768,
+				    cdrom_start_read_continuation);
+}
+
+
+
+
+/****************************************************************************
+ * Execute all other packet commands.
+ */
+
+/* Forward declarations. */
+static int
+cdrom_lockdoor (ide_drive_t *drive, int lockflag,
+		struct atapi_request_sense *reqbuf);
+
+
+
+/* Interrupt routine for packet command completion. */
+static void cdrom_pc_intr (ide_drive_t *drive)
+{
+	int ireason, len, stat, thislen;
+	struct request *rq = HWGROUP(drive)->rq;
+	struct packet_command *pc = (struct packet_command *)rq->buffer;
+
+	/* Check for errors. */
+	if (cdrom_decode_status (drive, 0, &stat)) return;
+
+	/* Read the interrupt reason and the transfer length. */
+	ireason = IN_BYTE (IDE_NSECTOR_REG);
+	len = IN_BYTE (IDE_LCYL_REG) + 256 * IN_BYTE (IDE_HCYL_REG);
+
+	/* 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 (pc->c[0] == REQUEST_SENSE &&
+		    pc->buflen > 0 &&
+		    pc->buflen <= 5) {
+			while (pc->buflen > 0) {
+				*pc->buffer++ = 0;
+				--pc->buflen;
+			}
+		}
+
+		if (pc->buflen == 0)
+			cdrom_end_request (1, drive);
+		else {
+			printk ("%s: cdrom_pc_intr: data underrun %d\n",
+				drive->name, pc->buflen);
+			pc->stat = 1;
+			cdrom_end_request (1, drive);
+		}
+		return;
+	}
+
+	/* Figure out how much data to transfer. */
+	thislen = pc->buflen;
+	if (thislen < 0) thislen = -thislen;
+	if (thislen > len) thislen = len;
+
+	/* The drive wants to be written to. */
+	if ((ireason & 3) == 0) {
+		/* Check that we want to write. */
+		if (pc->buflen > 0) {
+			printk ("%s: cdrom_pc_intr: Drive wants "
+				"to transfer data the wrong way!\n",
+				drive->name);
+			pc->stat = 1;
+			thislen = 0;
+		}
+
+		/* Transfer the data. */
+		cdrom_out_bytes (drive, pc->buffer, thislen);
+
+		/* If we haven't moved enough data to satisfy the drive,
+		   add some padding. */
+		while (len > thislen) {
+			int dum = 0;
+			cdrom_out_bytes (drive, &dum, sizeof (dum));
+			len -= sizeof (dum);
+		}
+
+		/* Keep count of how much data we've moved. */
+		pc->buffer += thislen;
+		pc->buflen += thislen;
+	}
+
+	/* Same drill for reading. */
+	else if ((ireason & 3) == 2) {
+		/* Check that we want to read. */
+		if (pc->buflen < 0) {
+			printk ("%s: cdrom_pc_intr: Drive wants to "
+				"transfer data the wrong way!\n",
+				drive->name);
+			pc->stat = 1;
+			thislen = 0;
+		}
+
+		/* Transfer the data. */
+		cdrom_in_bytes (drive, pc->buffer, thislen);
+
+		/* If we haven't moved enough data to satisfy the drive,
+		   add some padding. */
+		while (len > thislen) {
+			int dum = 0;
+			cdrom_in_bytes (drive, &dum, sizeof (dum));
+			len -= sizeof (dum);
+		}
+
+		/* Keep count of how much data we've moved. */
+		pc->buffer += thislen;
+		pc->buflen -= thislen;
+	} else {
+		printk ("%s: cdrom_pc_intr: The drive "
+			"appears confused (ireason = 0x%2x)\n",
+			drive->name, ireason);
+		pc->stat = 1;
+	}
+
+	/* Now we wait for another interrupt. */
+	ide_set_handler (drive, &cdrom_pc_intr, WAIT_CMD);
+}
+
+
+static void cdrom_do_pc_continuation (ide_drive_t *drive)
+{
+	struct request *rq = HWGROUP(drive)->rq;
+	struct packet_command *pc = (struct packet_command *)rq->buffer;
+
+	/* Send the command to the drive and return. */
+	cdrom_transfer_packet_command (drive, pc->c,
+				       sizeof (pc->c), &cdrom_pc_intr);
+}
+
+
+static void cdrom_do_packet_command (ide_drive_t *drive)
+{
+	int len;
+	struct request *rq = HWGROUP(drive)->rq;
+	struct packet_command *pc = (struct packet_command *)rq->buffer;
+
+	len = pc->buflen;
+	if (len < 0) len = -len;
+
+	pc->stat = 0;
+
+	/* Start sending the command to the drive. */
+	cdrom_start_packet_command (drive, len, cdrom_do_pc_continuation);
+}
+
+
+/* Sleep for TIME jiffies.
+   Not to be called from an interrupt handler. */
+static
+void cdrom_sleep (int time)
+{
+	current->state = TASK_INTERRUPTIBLE;
+	current->timeout = jiffies + time;
+	schedule ();
+}
+
+static
+int cdrom_queue_packet_command (ide_drive_t *drive, struct packet_command *pc)
+{
+	struct atapi_request_sense my_reqbuf;
+	int retries = 10;
+	struct request req;
+
+	/* If our caller has not provided a place to stick any sense data,
+	   use our own area. */
+	if (pc->sense_data == NULL)
+		pc->sense_data = &my_reqbuf;
+	pc->sense_data->sense_key = 0;
+
+	/* Start of retry loop. */
+	do {
+		ide_init_drive_cmd (&req);
+		req.cmd = PACKET_COMMAND;
+		req.buffer = (char *)pc;
+		(void) ide_do_drive_cmd (drive, &req, ide_wait);
+
+		if (pc->stat != 0) {
+			/* The request failed.  Retry if it was due to a unit
+			   attention status
+			   (usually means media was changed). */
+			struct atapi_request_sense *reqbuf = pc->sense_data;
+
+			if (reqbuf->sense_key == UNIT_ATTENTION)
+				;
+			else if (reqbuf->sense_key == NOT_READY &&
+				 reqbuf->asc == 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. */
+				cdrom_sleep (HZ);
+			} else
+				/* Otherwise, don't retry. */
+				retries = 0;
+
+			--retries;
+		}
+
+		/* End of retry loop. */
+	} while (pc->stat != 0 && retries >= 0);
+
+
+	/* Return an error if the command failed. */
+	if (pc->stat != 0)
+		return -EIO;
+	else {
+		/* The command succeeded.  If it was anything other than
+		   a request sense, eject, or door lock command,
+		   and we think that the door is presently, lock it again.
+		   (The door was probably unlocked via an explicit
+		   CDROMEJECT ioctl.) */
+		if (CDROM_STATE_FLAGS (drive)->door_locked == 0 &&
+		    (pc->c[0] != REQUEST_SENSE &&
+		     pc->c[0] != ALLOW_MEDIUM_REMOVAL &&
+		     pc->c[0] != START_STOP)) {
+			(void) cdrom_lockdoor (drive, 1, NULL);
+		}
+		return 0;
+	}
+}
+
+
+/****************************************************************************
+ * cdrom driver request routine.
+ */
+
+void ide_do_rw_cdrom (ide_drive_t *drive, unsigned long block)
+{
+	struct request *rq = HWGROUP(drive)->rq;
+
+	if (rq -> cmd == PACKET_COMMAND || rq -> cmd == REQUEST_SENSE_COMMAND)
+		cdrom_do_packet_command (drive);
+	else if (rq -> cmd == RESET_DRIVE_COMMAND) {
+		cdrom_end_request (1, drive);
+		ide_do_reset (drive);
+		return;
+	} else if (rq -> cmd != READ) {
+		printk ("ide-cd: bad cmd %d\n", rq -> cmd);
+		cdrom_end_request (0, drive);
+	} else
+		cdrom_start_read (drive, block);
+}
+
+
+
+/****************************************************************************
+ * Ioctl handling.
+ *
+ * Routines which queue packet commands take as a final argument a pointer
+ * to an atapi_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_BLOCK_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_BLOCK_OFFSET;
+}
+
+
+static int
+cdrom_check_status (ide_drive_t  *drive,
+		    struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+
+	pc.sense_data = reqbuf;
+	pc.c[0] = TEST_UNIT_READY;
+
+        /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to 
+           switch CDs instead of supporting the LOAD_UNLOAD opcode   */
+
+        pc.c[7] = CDROM_STATE_FLAGS (drive)->sanyo_slot % 3;
+
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */
+static int
+cdrom_lockdoor (ide_drive_t *drive, int lockflag,
+		struct atapi_request_sense *reqbuf)
+{
+	struct atapi_request_sense my_reqbuf;
+	int stat;
+	struct packet_command pc;
+
+	if (reqbuf == NULL)
+		reqbuf = &my_reqbuf;
+
+	/* If the drive cannot lock the door, just pretend. */
+	if (CDROM_CONFIG_FLAGS (drive)->no_doorlock)
+		stat = 0;
+	else {
+		memset (&pc, 0, sizeof (pc));
+		pc.sense_data = reqbuf;
+
+		pc.c[0] = ALLOW_MEDIUM_REMOVAL;
+		pc.c[4] = (lockflag != 0);
+		stat = cdrom_queue_packet_command (drive, &pc);
+	}
+
+	if (stat == 0)
+		CDROM_STATE_FLAGS (drive)->door_locked = lockflag;
+	else {
+		/* If we got an illegal field error, the drive
+		   probably cannot lock the door. */
+		if (reqbuf->sense_key == ILLEGAL_REQUEST &&
+		    (reqbuf->asc == 0x24 || reqbuf->asc == 0x20)) {
+			printk ("%s: door locking not supported\n",
+				drive->name);
+			CDROM_CONFIG_FLAGS (drive)->no_doorlock = 1;
+			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 atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.c[0] = START_STOP;
+	pc.c[4] = 2 + (ejectflag != 0);
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+static int
+cdrom_pause (ide_drive_t *drive, int pauseflag,
+	     struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.c[0] = SCMD_PAUSE_RESUME;
+	pc.c[8] = !pauseflag;
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+static int
+cdrom_startstop (ide_drive_t *drive, int startflag,
+		 struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.c[0] = START_STOP;
+	pc.c[1] = 1;
+	pc.c[4] = startflag;
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+static int
+cdrom_read_capacity (ide_drive_t *drive, unsigned *capacity,
+		     struct atapi_request_sense *reqbuf)
+{
+	struct {
+		unsigned lba;
+		unsigned blocklen;
+	} capbuf;
+
+	int stat;
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.c[0] = READ_CAPACITY;
+	pc.buffer = (char *)&capbuf;
+	pc.buflen = sizeof (capbuf);
+
+	stat = cdrom_queue_packet_command (drive, &pc);
+	if (stat == 0)
+		*capacity = ntohl (capbuf.lba);
+
+	return stat;
+}
+
+
+static int
+cdrom_read_tocentry (ide_drive_t *drive, int trackno, int msf_flag,
+                     int format, char *buf, int buflen,
+		     struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.buffer =  buf;
+	pc.buflen = buflen;
+	pc.c[0] = SCMD_READ_TOC;
+	pc.c[6] = trackno;
+	pc.c[7] = (buflen >> 8);
+	pc.c[8] = (buflen & 0xff);
+	pc.c[9] = (format << 6);
+	if (msf_flag) pc.c[1] = 2;
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+/* Try to read the entire TOC for the disk into our internal buffer. */
+static int
+cdrom_read_toc (ide_drive_t *drive,
+		struct atapi_request_sense *reqbuf)
+{
+	int stat, ntracks, i;
+	struct atapi_toc *toc = drive->cdrom_info.toc;
+	struct {
+		struct atapi_toc_header hdr;
+		struct atapi_toc_entry  ent;
+	} ms_tmp;
+
+	if (toc == NULL) {
+		/* Try to allocate space. */
+		toc = (struct atapi_toc *) kmalloc (sizeof (struct atapi_toc),
+						    GFP_KERNEL);
+		drive->cdrom_info.toc = toc;
+	}
+
+	if (toc == NULL) {
+		printk ("%s: No cdrom TOC buffer!\n", drive->name);
+		return -EIO;
+	}
+
+	/* Check to see if the existing data is still valid.
+	   If it is, just return. */
+	if (CDROM_STATE_FLAGS (drive)->toc_valid)
+		(void) cdrom_check_status (drive, NULL);
+
+	if (CDROM_STATE_FLAGS (drive)->toc_valid) return 0;
+
+	/* 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) +
+				    sizeof (struct atapi_toc_entry),
+				    reqbuf);
+	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, 0, 1, 0, (char *)&toc->hdr,
+				    sizeof (struct atapi_toc_header) +
+				    (ntracks+1) *
+				      sizeof (struct atapi_toc_entry),
+				    reqbuf);
+	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. */
+	stat = cdrom_read_tocentry (drive, 0, 1, 1,
+				    (char *)&ms_tmp, sizeof (ms_tmp),
+				    reqbuf);
+	if (stat) return stat;
+
+#if ! STANDARD_ATAPI
+	if (CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd)
+		msf_from_bcd (&ms_tmp.ent.addr.msf);
+#endif  /* not STANDARD_ATAPI */
+
+	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);
+
+	toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track);
+
+	/* Now try to get the total cdrom capacity. */
+	stat = cdrom_read_capacity (drive, &toc->capacity, reqbuf);
+	if (stat) toc->capacity = 0x1fffff;
+
+	HWIF(drive)->gd->sizes[drive->select.b.unit << PARTN_BITS]
+		= toc->capacity * SECTORS_PER_FRAME;
+	drive->part[0].nr_sects = 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 atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.buffer =  buf;
+	pc.buflen = buflen;
+	pc.c[0] = SCMD_READ_SUBCHANNEL;
+	pc.c[1] = 2;     /* MSF addressing */
+	pc.c[2] = 0x40;  /* request subQ data */
+	pc.c[3] = format,
+	pc.c[7] = (buflen >> 8);
+	pc.c[8] = (buflen & 0xff);
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+/* modeflag: 0 = current, 1 = changeable mask, 2 = default, 3 = saved */
+static int
+cdrom_mode_sense (ide_drive_t *drive, int pageno, int modeflag,
+                  char *buf, int buflen,
+		  struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.buffer =  buf;
+	pc.buflen = buflen;
+	pc.c[0] = MODE_SENSE_10;
+	pc.c[2] = pageno | (modeflag << 6);
+	pc.c[7] = (buflen >> 8);
+	pc.c[8] = (buflen & 0xff);
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+static int
+cdrom_mode_select (ide_drive_t *drive, int pageno, char *buf, int buflen,
+		   struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.buffer =  buf;
+	pc.buflen = - buflen;
+	pc.c[0] = MODE_SELECT_10;
+	pc.c[1] = 0x10;
+	pc.c[2] = pageno;
+	pc.c[7] = (buflen >> 8);
+	pc.c[8] = (buflen & 0xff);
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+static int
+cdrom_play_lba_range_1 (ide_drive_t *drive, int lba_start, int lba_end,
+			    struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.c[0] = SCMD_PLAYAUDIO_MSF;
+	lba_to_msf (lba_start, &pc.c[3], &pc.c[4], &pc.c[5]);
+	lba_to_msf (lba_end-1, &pc.c[6], &pc.c[7], &pc.c[8]);
+
+#if ! STANDARD_ATAPI
+	if (CDROM_CONFIG_FLAGS (drive)->playmsf_as_bcd) {
+		pc.c[3] = bin2bcd (pc.c[3]);
+		pc.c[4] = bin2bcd (pc.c[4]);
+		pc.c[5] = bin2bcd (pc.c[5]);
+		pc.c[6] = bin2bcd (pc.c[6]);
+		pc.c[7] = bin2bcd (pc.c[7]);
+		pc.c[8] = bin2bcd (pc.c[8]);
+	}
+#endif /* not STANDARD_ATAPI */
+
+	return cdrom_queue_packet_command (drive, &pc);
+}
+
+
+/* Play audio starting at LBA LBA_START and finishing with the
+   LBA before LBA_END. */
+static int
+cdrom_play_lba_range (ide_drive_t *drive, int lba_start, int lba_end,
+		      struct atapi_request_sense *reqbuf)
+{
+	int i, stat;
+	struct atapi_request_sense my_reqbuf;
+
+	if (reqbuf == NULL)
+		reqbuf = &my_reqbuf;
+
+	/* Some drives, will, for certain audio cds,
+	   give an error if you ask them to play the entire cd using the
+	   values which are returned in the TOC.  The play will succeed,
+	   however, if the ending address is adjusted downwards
+	   by a few frames. */
+	for (i=0; i<75; i++) {
+		stat = cdrom_play_lba_range_1 (drive, lba_start, lba_end,
+					       reqbuf);
+
+		if (stat == 0 ||
+		    !(reqbuf->sense_key == ILLEGAL_REQUEST &&
+		      reqbuf->asc == 0x24))
+			return stat;
+
+		--lba_end;
+		if (lba_end <= lba_start) break;
+	}
+
+	return stat;
+}
+
+
+static
+int cdrom_get_toc_entry (ide_drive_t *drive, int track,
+                         struct atapi_toc_entry **ent,
+			 struct atapi_request_sense *reqbuf)
+{
+	int stat, ntracks;
+	struct atapi_toc *toc;
+
+	/* Make sure our saved TOC is valid. */
+	stat = cdrom_read_toc (drive, reqbuf);
+	if (stat) return stat;
+
+	toc = drive->cdrom_info.toc;
+
+	/* Check validity of requested track number. */
+	ntracks = toc->hdr.last_track - toc->hdr.first_track + 1;
+	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;
+}
+
+
+static int
+cdrom_read_block (ide_drive_t *drive, int format, int lba, int nblocks,
+		  char *buf, int buflen,
+		  struct atapi_request_sense *reqbuf)
+{
+	struct packet_command pc;
+	struct atapi_request_sense my_reqbuf;
+	int stat;
+
+	if (reqbuf == NULL)
+		reqbuf = &my_reqbuf;
+
+	memset (&pc, 0, sizeof (pc));
+	pc.sense_data = reqbuf;
+
+	pc.buffer = buf;
+	pc.buflen = buflen;
+
+#if ! STANDARD_ATAPI
+	if (CDROM_CONFIG_FLAGS (drive)->old_readcd)
+		pc.c[0] = 0xd4;
+	else
+#endif  /* not STANDARD_ATAPI */
+		pc.c[0] = READ_CD;
+
+	pc.c[1] = (format << 2);
+	put_unaligned(htonl(lba), (unsigned int *) &pc.c[2]);
+	pc.c[8] = (nblocks & 0xff);
+	pc.c[7] = ((nblocks>>8) & 0xff);
+	pc.c[6] = ((nblocks>>16) & 0xff);
+	if (format <= 1)
+		pc.c[9] = 0xf8;
+	else
+		pc.c[9] = 0x10;
+
+	stat = cdrom_queue_packet_command (drive, &pc);
+
+#if ! STANDARD_ATAPI
+	/* If the drive doesn't recognize the READ CD opcode, retry the command
+	   with an older opcode for that command. */
+	if (stat && reqbuf->sense_key == ILLEGAL_REQUEST &&
+	    reqbuf->asc == 0x20 &&
+	    CDROM_CONFIG_FLAGS (drive)->old_readcd == 0) {
+		printk ("%s: Drive does not recognize READ_CD;"
+			"trying opcode 0xd4\n",
+			drive->name);
+		CDROM_CONFIG_FLAGS (drive)->old_readcd = 1;
+		return cdrom_read_block (drive, format, lba, nblocks,
+					 buf, buflen, reqbuf);
+	}
+#endif  /* not STANDARD_ATAPI */
+
+	return stat;
+}
+
+
+/* If SLOT<0, unload the current slot.  Otherwise, try to load SLOT. */
+static int
+cdrom_load_unload (ide_drive_t *drive, int slot,
+		   struct atapi_request_sense *reqbuf)
+{
+	/* if the drive is a Sanyo 3 CD changer then TEST_UNIT_READY
+           (used in the cdrom_check_status function) is used to 
+           switch CDs instead of LOAD_UNLOAD */
+
+	if (CDROM_STATE_FLAGS (drive)->sanyo_slot > 0) {
+
+        	if ((slot == 1) || (slot == 2)) {
+			CDROM_STATE_FLAGS (drive)->sanyo_slot = slot;
+		} else if (slot >= 0) {
+			CDROM_STATE_FLAGS (drive)->sanyo_slot = 3;
+		} else {
+			return 0;
+		}
+
+		return cdrom_check_status (drive, NULL);
+
+	} else {
+
+		/* ATAPI Rev. 2.2+ standard for requesting switching of
+                   CDs in a multiplatter device */
+
+		struct packet_command pc;
+
+		memset (&pc, 0, sizeof (pc));
+		pc.sense_data = reqbuf;
+
+		pc.c[0] = LOAD_UNLOAD;
+		pc.c[4] = 2 + (slot >= 0);
+		pc.c[8] = slot;
+		return cdrom_queue_packet_command (drive, &pc);
+
+	}
+}
+
+
+int ide_cdrom_ioctl (ide_drive_t *drive, struct inode *inode,
+		     struct file *file, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+	case CDROMEJECT: {
+		int stat;
+
+		if (drive->usage > 1)
+			return -EBUSY;
+
+		stat = cdrom_lockdoor (drive, 0, NULL);
+		if (stat) return stat;
+
+		return cdrom_eject (drive, 0, NULL);
+	}
+
+	case CDROMCLOSETRAY: {
+		int stat;
+		if (drive->usage > 1)
+			return -EBUSY;
+
+		stat = cdrom_eject (drive, 1, NULL);
+		if (stat) return stat;
+
+		return cdrom_lockdoor (drive, 1, NULL);
+	}
+
+	case CDROMEJECT_SW: {
+		CDROM_STATE_FLAGS (drive)->eject_on_close = arg;
+		return 0;
+	}
+
+	case CDROMPAUSE:
+		return cdrom_pause (drive, 1, NULL);
+
+	case CDROMRESUME:
+		return cdrom_pause (drive, 0, NULL);
+
+	case CDROMSTART:
+		return cdrom_startstop (drive, 1, NULL);
+
+	case CDROMSTOP: {
+#ifdef IHAVEADOLPHIN
+		/*  Certain Drives require this.  Most don't
+		    and will produce errors upon CDROMSTOP
+		    pit says the Dolphin needs this.  If you
+		    own a dolphin, just define IHAVEADOLPHIN somewhere */
+		int stat;
+		stat = cdrom_startstop (drive, 0, NULL);
+		if (stat) return stat;
+		return cdrom_eject (drive, 1, NULL);
+#endif /* end of IHAVEADOLPHIN  */
+		return cdrom_startstop (drive, 0, NULL);
+	}
+
+	case CDROMPLAYMSF: {
+		struct cdrom_msf msf;
+		int stat, lba_start, lba_end;
+
+		stat = verify_area (VERIFY_READ, (void *)arg, sizeof (msf));
+		if (stat) return stat;
+
+		memcpy_fromfs (&msf, (void *) arg, sizeof(msf));
+
+		lba_start = msf_to_lba (msf.cdmsf_min0, msf.cdmsf_sec0,
+					msf.cdmsf_frame0);
+		lba_end = msf_to_lba (msf.cdmsf_min1, msf.cdmsf_sec1,
+				      msf.cdmsf_frame1) + 1;
+
+		if (lba_end <= lba_start) return -EINVAL;
+
+		return cdrom_play_lba_range (drive, lba_start, lba_end, NULL);
+	}
+
+	/* Like just about every other Linux cdrom driver, we ignore the
+	   index part of the request here. */
+	case CDROMPLAYTRKIND: {
+		int stat, lba_start, lba_end;
+		struct cdrom_ti ti;
+		struct atapi_toc_entry *first_toc, *last_toc;
+
+		stat = verify_area (VERIFY_READ, (void *)arg, sizeof (ti));
+		if (stat) return stat;
+
+		memcpy_fromfs (&ti, (void *) arg, sizeof(ti));
+
+		stat = cdrom_get_toc_entry (drive, ti.cdti_trk0, &first_toc,
+					    NULL);
+		if (stat) return stat;
+		stat = cdrom_get_toc_entry (drive, ti.cdti_trk1, &last_toc,
+					    NULL);
+		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_lba_range (drive, lba_start, lba_end, NULL);
+	}
+
+	case CDROMREADTOCHDR: {
+		int stat;
+		struct cdrom_tochdr tochdr;
+		struct atapi_toc *toc;
+
+		stat = verify_area (VERIFY_WRITE, (void *) arg,
+				    sizeof (tochdr));
+		if (stat) return stat;
+
+		/* Make sure our saved TOC is valid. */
+		stat = cdrom_read_toc (drive, NULL);
+		if (stat) return stat;
+
+		toc = drive->cdrom_info.toc;
+		tochdr.cdth_trk0 = toc->hdr.first_track;
+		tochdr.cdth_trk1 = toc->hdr.last_track;
+
+		memcpy_tofs ((void *) arg, &tochdr, sizeof (tochdr));
+
+		return stat;
+	}
+
+	case CDROMREADTOCENTRY: {
+		int stat;
+		struct cdrom_tocentry tocentry;
+		struct atapi_toc_entry *toce;
+
+		stat = verify_area (VERIFY_WRITE, (void *) arg,
+				    sizeof (tocentry));
+		if (stat) return stat;
+
+		memcpy_fromfs (&tocentry, (void *) arg, sizeof (tocentry));
+
+		stat = cdrom_get_toc_entry (drive, tocentry.cdte_track, &toce,
+					    NULL);
+		if (stat) return stat;
+
+		tocentry.cdte_ctrl = toce->control;
+		tocentry.cdte_adr  = toce->adr;
+
+		if (tocentry.cdte_format == CDROM_MSF) {
+			/* convert to 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;
+
+		memcpy_tofs ((void *) arg, &tocentry, sizeof (tocentry));
+
+		return stat;
+	}
+
+	case CDROMSUBCHNL: {
+		struct atapi_cdrom_subchnl scbuf;
+		int stat;
+		struct cdrom_subchnl subchnl;
+
+		stat = verify_area (VERIFY_WRITE, (void *) arg,
+				    sizeof (subchnl));
+		if (stat) return stat;
+
+		memcpy_fromfs (&subchnl, (void *) arg, sizeof (subchnl));
+
+		stat = cdrom_read_subchannel (drive, 1, /* current position */
+					      (char *)&scbuf, sizeof (scbuf),
+					      NULL);
+		if (stat) return stat;
+
+#if ! STANDARD_ATAPI
+		if (CDROM_CONFIG_FLAGS (drive)->subchan_as_bcd) {
+			msf_from_bcd (&scbuf.acdsc_absaddr.msf);
+			msf_from_bcd (&scbuf.acdsc_reladdr.msf);
+		}
+		if (CDROM_CONFIG_FLAGS (drive)->tocaddr_as_bcd)
+			scbuf.acdsc_trk = bcd2bin (scbuf.acdsc_trk);
+#endif /* not STANDARD_ATAPI */
+
+		if (subchnl.cdsc_format == CDROM_MSF) {
+			subchnl.cdsc_absaddr.msf.minute =
+				scbuf.acdsc_absaddr.msf.minute;
+			subchnl.cdsc_absaddr.msf.second =
+				scbuf.acdsc_absaddr.msf.second;
+			subchnl.cdsc_absaddr.msf.frame =
+				scbuf.acdsc_absaddr.msf.frame;
+
+			subchnl.cdsc_reladdr.msf.minute =
+				scbuf.acdsc_reladdr.msf.minute;
+			subchnl.cdsc_reladdr.msf.second =
+				scbuf.acdsc_reladdr.msf.second;
+			subchnl.cdsc_reladdr.msf.frame =
+				scbuf.acdsc_reladdr.msf.frame;
+		} else {
+			subchnl.cdsc_absaddr.lba =
+				msf_to_lba (scbuf.acdsc_absaddr.msf.minute,
+					    scbuf.acdsc_absaddr.msf.second,
+					    scbuf.acdsc_absaddr.msf.frame);
+			subchnl.cdsc_reladdr.lba =
+				msf_to_lba (scbuf.acdsc_reladdr.msf.minute,
+					    scbuf.acdsc_reladdr.msf.second,
+					    scbuf.acdsc_reladdr.msf.frame);
+		}
+
+		subchnl.cdsc_audiostatus = scbuf.acdsc_audiostatus;
+		subchnl.cdsc_ctrl = scbuf.acdsc_ctrl;
+		subchnl.cdsc_trk  = scbuf.acdsc_trk;
+		subchnl.cdsc_ind  = scbuf.acdsc_ind;
+
+		memcpy_tofs ((void *) arg, &subchnl, sizeof (subchnl));
+
+		return stat;
+	}
+
+	case CDROMVOLCTRL: {
+		struct cdrom_volctrl volctrl;
+		char buffer[24], mask[24];
+		int stat;
+
+		stat = verify_area (VERIFY_READ, (void *) arg,
+				    sizeof (volctrl));
+		if (stat) return stat;
+		memcpy_fromfs (&volctrl, (void *) arg, sizeof (volctrl));
+
+		stat = cdrom_mode_sense (drive, 0x0e, 0, buffer,
+					 sizeof (buffer), NULL);
+		if (stat) return stat;
+		stat = cdrom_mode_sense (drive, 0x0e, 1, mask,
+					 sizeof (buffer), NULL);
+		if (stat) return stat;
+
+		buffer[1] = buffer[2] = 0;
+
+		buffer[17] = volctrl.channel0 & mask[17];
+		buffer[19] = volctrl.channel1 & mask[19];
+		buffer[21] = volctrl.channel2 & mask[21];
+		buffer[23] = volctrl.channel3 & mask[23];
+
+		return cdrom_mode_select (drive, 0x0e, buffer,
+					  sizeof (buffer), NULL);
+	}
+
+	case CDROMVOLREAD: {
+		struct cdrom_volctrl volctrl;
+		char buffer[24];
+		int stat;
+
+		stat = verify_area (VERIFY_WRITE, (void *) arg,
+				    sizeof (volctrl));
+		if (stat) return stat;
+
+		stat = cdrom_mode_sense (drive, 0x0e, 0, buffer,
+					 sizeof (buffer), NULL);
+		if (stat) return stat;
+
+		volctrl.channel0 = buffer[17];
+		volctrl.channel1 = buffer[19];
+		volctrl.channel2 = buffer[21];
+		volctrl.channel3 = buffer[23];
+
+		memcpy_tofs ((void *) arg, &volctrl, sizeof (volctrl));
+
+		return 0;
+	}
+
+	case CDROMMULTISESSION: {
+		struct cdrom_multisession ms_info;
+		struct atapi_toc *toc;
+		int stat;
+
+		stat = verify_area (VERIFY_WRITE, (void *)arg,
+				    sizeof (ms_info));
+		if (stat) return stat;
+
+		memcpy_fromfs (&ms_info, (void *)arg, sizeof (ms_info));
+
+		/* Make sure the TOC information is valid. */
+		stat = cdrom_read_toc (drive, NULL);
+		if (stat) return stat;
+
+		toc = drive->cdrom_info.toc;
+
+		if (ms_info.addr_format == CDROM_MSF)
+			lba_to_msf (toc->last_session_lba,
+				    &ms_info.addr.msf.minute,
+				    &ms_info.addr.msf.second,
+				    &ms_info.addr.msf.frame);
+		else if (ms_info.addr_format == CDROM_LBA)
+			ms_info.addr.lba = toc->last_session_lba;
+		else
+			return -EINVAL;
+
+		ms_info.xa_flag = toc->xa_flag;
+
+		memcpy_tofs ((void *)arg, &ms_info, sizeof (ms_info));
+
+		return 0;
+	}
+
+	/* Read 2352 byte blocks from audio tracks. */
+	case CDROMREADAUDIO: {
+		int stat, lba;
+		struct atapi_toc *toc;
+		struct cdrom_read_audio ra;
+		char *buf;
+
+		/* Make sure the TOC is up to date. */
+		stat = cdrom_read_toc (drive, NULL);
+		if (stat) return stat;
+
+		toc = drive->cdrom_info.toc;
+
+		stat = verify_area (VERIFY_READ, (char *)arg, sizeof (ra));
+		if (stat) return stat;
+
+		memcpy_fromfs (&ra, (void *)arg, sizeof (ra));
+
+		if (ra.nframes < 0 || ra.nframes > toc->capacity)
+			return -EINVAL;
+		else if (ra.nframes == 0)
+			return 0;
+
+		stat = verify_area (VERIFY_WRITE, (char *)ra.buf,
+				    ra.nframes * CD_FRAMESIZE_RAW);
+		if (stat) return stat;
+
+		if (ra.addr_format == CDROM_MSF)
+			lba = msf_to_lba (ra.addr.msf.minute,
+					  ra.addr.msf.second,
+					  ra.addr.msf.frame);
+		else if (ra.addr_format == CDROM_LBA)
+			lba = ra.addr.lba;
+		else
+			return -EINVAL;
+
+		if (lba < 0 || lba >= toc->capacity)
+			return -EINVAL;
+
+		buf = (char *) kmalloc (CDROM_NBLOCKS_BUFFER*CD_FRAMESIZE_RAW,
+					GFP_KERNEL);
+		if (buf == NULL)
+			return -ENOMEM;
+
+		while (ra.nframes > 0) {
+			int this_nblocks = ra.nframes;
+			if (this_nblocks > CDROM_NBLOCKS_BUFFER)
+				this_nblocks = CDROM_NBLOCKS_BUFFER;
+			stat = cdrom_read_block
+				(drive, 1, lba, this_nblocks,
+				 buf, this_nblocks * CD_FRAMESIZE_RAW, NULL);
+			if (stat) break;
+
+			memcpy_tofs (ra.buf, buf,
+				     this_nblocks * CD_FRAMESIZE_RAW);
+			ra.buf += this_nblocks * CD_FRAMESIZE_RAW;
+			ra.nframes -= this_nblocks;
+			lba += this_nblocks;
+		}
+
+		kfree (buf);
+		return stat;
+	}
+	case CDROMREADRAW:
+	case CDROMREADMODE1:
+	case CDROMREADMODE2: {
+		struct cdrom_msf msf;
+		int blocksize, format, stat, lba;
+		char *buf;
+
+		if (cmd == CDROMREADMODE1) {
+			blocksize = CD_FRAMESIZE;
+			format = 2;
+		} else if (cmd == CDROMREADMODE2) {
+				blocksize = CD_FRAMESIZE_RAW0;
+				format = 3;
+		       } else {
+				blocksize = CD_FRAMESIZE_RAW;
+			 	format = 0;      	
+		       }
+
+		stat = verify_area (VERIFY_WRITE, (char *)arg, blocksize);
+		if (stat) return stat;
+
+		memcpy_fromfs (&msf, (void *)arg, sizeof (msf));
+
+		lba = msf_to_lba (msf.cdmsf_min0,
+				  msf.cdmsf_sec0,
+				  msf.cdmsf_frame0);
+	
+		/* DON'T make sure the TOC is up to date. */
+	     /*	stat = cdrom_read_toc (drive, NULL);
+		if (stat) return stat;
+
+		toc = drive->cdrom_info.toc;
+
+		if (lba < 0 || lba >= toc->capacity)
+			return -EINVAL; */
+
+		buf = (char *) kmalloc (CD_FRAMESIZE_RAW, GFP_KERNEL);
+		if (buf == NULL)
+			return -ENOMEM;
+
+		stat = cdrom_read_block (drive, format, lba, 1, buf, blocksize,
+					 NULL);
+		if (stat == 0)
+			memcpy_tofs ((char *)arg, buf, blocksize);
+
+		kfree (buf);
+		return stat;
+	}
+
+	case CDROM_GET_UPC: {
+		int stat;
+		char mcnbuf[24];
+		struct cdrom_mcn mcn;
+
+		stat = verify_area (VERIFY_WRITE, (void *) arg,
+				    sizeof (mcn));
+		if (stat) return stat;
+
+		stat = cdrom_read_subchannel (drive, 2, /* get MCN */
+					      mcnbuf, sizeof (mcnbuf),
+					      NULL);
+		if (stat) return stat;
+
+		memcpy (mcn.medium_catalog_number, mcnbuf+9,
+			sizeof (mcn.medium_catalog_number)-1);
+		mcn.medium_catalog_number[sizeof (mcn.medium_catalog_number)-1]
+			= '\0';
+
+		memcpy_tofs ((void *) arg, &mcn, sizeof (mcn));
+
+		return stat;
+	}
+
+	case CDROMLOADFROMSLOT:
+		printk ("%s: Use CDROM_SELECT_DISC "
+			" instead of CDROMLOADFROMSLOT.\n", drive->name);
+		/* Fall through. */
+
+	case CDROM_SELECT_DISC: {
+		struct atapi_request_sense my_reqbuf;
+		int stat;
+
+		if (drive->usage > 1)
+			return -EBUSY;
+
+		(void) cdrom_load_unload (drive, -1, NULL);
+
+                cdrom_saw_media_change (drive);
+                if (arg == -1) {
+			(void) cdrom_lockdoor (drive, 0, NULL);
+			return 0;
+		}
+		(void) cdrom_load_unload (drive, (int)arg, NULL);
+
+		stat = cdrom_check_status (drive, &my_reqbuf);
+		if (stat && my_reqbuf.sense_key == NOT_READY) {
+			return -ENOENT;
+		}
+
+		/* And try to read the TOC information now. */
+		return cdrom_read_toc (drive, &my_reqbuf);
+	}
+
+#if 0 /* Doesn't work reliably yet. */
+	case CDROMRESET: {
+		struct request req;
+		ide_init_drive_cmd (&req);
+		req.cmd = RESET_DRIVE_COMMAND;
+		return ide_do_drive_cmd (drive, &req, ide_wait);
+	}
+#endif
+
+ 
+#ifdef TEST
+	case 0x1234: {
+		int stat;
+		struct packet_command pc;
+		int len, lena;
+
+		memset (&pc, 0, sizeof (pc));
+
+		stat = verify_area (VERIFY_READ, (void *) arg, sizeof (pc.c));
+		if (stat) return stat;
+		memcpy_fromfs (&pc.c, (void *) arg, sizeof (pc.c));
+		arg += sizeof (pc.c);
+
+		stat = verify_area (VERIFY_READ, (void *) arg, sizeof (len));
+		if (stat) return stat;
+		memcpy_fromfs (&len, (void *) arg , sizeof (len));
+		arg += sizeof (len);
+
+		if (len > 0) {
+			stat = verify_area (VERIFY_WRITE, (void *) arg, len);
+			if (stat) return stat;
+		}
+
+		lena = len;
+		if (lena  < 0) lena = 0;
+
+		{
+			char buf[lena];
+			if (len > 0) {
+				pc.buflen = len;
+				pc.buffer = buf;
+			}
+
+			stat = cdrom_queue_packet_command (drive, &pc);
+
+			if (len > 0)
+				memcpy_tofs ((void *)arg, buf, len);
+		}
+
+		return stat;
+	}
+#endif
+
+	default:
+		return -EPERM;
+	}
+
+}
+
+
+
+/****************************************************************************
+ * Other driver requests (open, close, check media change).
+ */
+
+int ide_cdrom_check_media_change (ide_drive_t *drive)
+{
+	int retval;
+
+	(void) cdrom_check_status (drive, NULL);
+
+	retval = CDROM_STATE_FLAGS (drive)->media_changed;
+	CDROM_STATE_FLAGS (drive)->media_changed = 0;
+
+	return retval;
+}
+
+
+int ide_cdrom_open (struct inode *ip, struct file *fp, ide_drive_t *drive)
+{
+  /* no write access */
+	if (fp->f_mode & 2) {
+		--drive->usage;
+		return -EROFS;
+	}
+
+	/* If this is the first open, check the drive status. */
+	if (drive->usage == 1) {
+		int stat;
+		struct atapi_request_sense my_reqbuf;
+		my_reqbuf.sense_key = 0;
+
+		/* Get the drive status. */
+		stat = cdrom_check_status (drive, &my_reqbuf);
+
+		/* If the tray is open, try to close it. */
+		if (stat && my_reqbuf.sense_key == NOT_READY) {
+			cdrom_eject (drive, 1, &my_reqbuf);
+			stat = cdrom_check_status (drive, &my_reqbuf);
+		}
+
+		/* If things worked ok, lock the door and read the
+		   TOC information. */
+		if (stat == 0 || my_reqbuf.sense_key == UNIT_ATTENTION) {
+			(void) cdrom_lockdoor (drive, 1, &my_reqbuf);
+			(void) cdrom_read_toc (drive, &my_reqbuf);
+		}
+	}
+
+	return 0;
+}
+
+
+/*
+ * Close down the device.  Invalidate all cached blocks.
+ */
+
+void ide_cdrom_release (struct inode *inode, struct file *file,
+			ide_drive_t *drive)
+{
+	if (drive->usage == 0) {
+		invalidate_buffers (inode->i_rdev);
+
+		/* Unlock the door. */
+		(void) cdrom_lockdoor (drive, 0, NULL);
+
+		/* Do an eject if we were requested to do so. */
+		if (CDROM_STATE_FLAGS (drive)->eject_on_close)
+			(void) cdrom_eject (drive, 0, NULL);
+	}
+}
+
+
+
+/****************************************************************************
+ * Device initialization.
+ */
+
+void ide_cdrom_setup (ide_drive_t *drive)
+{
+	blksize_size[HWIF(drive)->major][drive->select.b.unit << PARTN_BITS] =
+		CD_FRAMESIZE;
+
+	drive->special.all = 0;
+	drive->ready_stat = 0;
+
+	CDROM_STATE_FLAGS (drive)->media_changed = 0;
+	CDROM_STATE_FLAGS (drive)->toc_valid     = 0;
+	CDROM_STATE_FLAGS (drive)->door_locked   = 0;
+
+	/* Turn this off by default, since many people don't like it. */
+	CDROM_STATE_FLAGS (drive)->eject_on_close= 0;
+
+#if NO_DOOR_LOCKING
+	CDROM_CONFIG_FLAGS (drive)->no_doorlock = 1;
+#else
+	CDROM_CONFIG_FLAGS (drive)->no_doorlock = 0;
+#endif
+
+	/* by default Sanyo 3 CD changer support is turned off and
+           ATAPI Rev 2.2+ standard support for CD changers is used */
+	CDROM_STATE_FLAGS (drive)->sanyo_slot = 0;
+
+	if (drive->id != NULL)
+		CDROM_CONFIG_FLAGS (drive)->drq_interrupt =
+			((drive->id->config & 0x0060) == 0x20);
+	else
+		CDROM_CONFIG_FLAGS (drive)->drq_interrupt = 0;
+
+#if ! STANDARD_ATAPI
+	drive->cdrom_info.max_sectors = 252;
+
+	CDROM_CONFIG_FLAGS (drive)->old_readcd = 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 (drive->id != NULL) {
+		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, "GCD-R580B") == 0)
+			drive->cdrom_info.max_sectors = 124;
+
+		else if (strcmp (drive->id->model,
+				 "NEC CD-ROM DRIVE:260") == 0 &&
+			 strcmp (drive->id->fw_rev, "1.01") == 0) {
+			/* Old NEC260 (not R). */
+			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, "WEARNES CDD-120") == 0 &&
+			 strcmp (drive->id->fw_rev, "A1.1") == 0) {
+			/* 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 */
+                        CDROM_STATE_FLAGS (drive)->sanyo_slot = 3;
+                }
+                
+	}
+#endif /* not STANDARD_ATAPI */
+
+	drive->cdrom_info.toc               = NULL;
+	drive->cdrom_info.sector_buffer     = NULL;
+	drive->cdrom_info.sector_buffered   = 0;
+	drive->cdrom_info.nsectors_buffered = 0;
+}
+
+
+
+/*
+ * TODO (for 2.1?):
+ *  Avoid printing error messages for expected errors from the drive.
+ *  Integrate with generic cdrom driver.
+ *  Query the drive to find what features are available
+ *   before trying to use them.
+ *  Integrate spindown time adjustment patch.
+ *  Modularize.
+ *  CDROMRESET ioctl.
+ *  Better support for changers.
+ */
+
+
+
+/*==========================================================================*/
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */