ide-cd.c 95 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
/*
 * 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 accomodated 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>
 *
 *************************************************************************/
 
#define IDECD_VERSION "4.59"

#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>

312 313
#include <scsi/scsi.h>	/* For SCSI -> ATAPI command conversion */

314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#include <asm/unaligned.h>

#include "ide-cd.h"

/****************************************************************************
 * 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;
}

337
static int cdrom_log_sense(ide_drive_t *drive, struct request *rq,
338 339 340 341
			   struct request_sense *sense)
{
	int log = 0;

342
	if (!sense || !rq || (rq->flags & REQ_QUIET))
343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374
		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 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,
375
			      struct request *failed_command,
376 377 378 379 380 381 382 383 384 385
			      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)
	 */
386
	if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP)
387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456
		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("  %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 ==
457
				    failed_command->cmd[0]) {
458 459 460 461
					s = packet_command_texts[mid].text;
					break;
				}
				if (packet_command_texts[mid].packet_command >
462
				    failed_command->cmd[0])
463 464 465 466 467 468
					hi = mid;
				else
					lo = mid+1;
			}

			printk ("  The failed \"%s\" packet command was: \n  \"", s);
469 470
			for (i=0; i<sizeof (failed_command->cmd); i++)
				printk ("%02x ", failed_command->cmd[i]);
471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515
			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("  Command is %02d%% complete\n", progress / 0xffff);

		}

		if (sense->sense_key == ILLEGAL_REQUEST &&
		    (sense->sks[0] & 0x80) != 0) {
			printk("  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("%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 */
}

516 517 518 519 520
/*
 * Initialize a ide-cd packet command request
 */
static void cdrom_prepare_request(struct request *rq)
{
521
	ide_init_drive_cmd(rq);
522 523 524
	rq->flags = REQ_PC;
}

525 526
static void cdrom_queue_request_sense(ide_drive_t *drive, 
				      struct completion *wait,
527 528
				      void *sense,
				      struct request *failed_command)
529 530
{
	struct cdrom_info *info		= drive->driver_data;
531
	struct request *rq		= &info->request_sense_request;
532 533 534 535 536

	if (sense == NULL)
		sense = &info->sense_data;

	/* stuff the sense request in front of our current request */
537 538 539 540 541 542
	cdrom_prepare_request(rq);

	rq->data = sense;
	rq->cmd[0] = GPCMD_REQUEST_SENSE;
	rq->cmd[4] = rq->data_len = 18;

543 544
	rq->flags = REQ_SENSE;
	rq->waiting = wait;
545 546 547 548

	/* NOTE! Save the failed command in "rq->buffer" */
	rq->buffer = (void *) failed_command;

549 550 551 552 553 554 555 556 557 558 559
	(void) ide_do_drive_cmd(drive, rq, ide_preempt);
}


/*
 * Error reporting, in human readable form (luxurious, but a memory hog).
 */
byte ide_cdrom_dump_status (ide_drive_t *drive, const char *msg, byte stat)
{
	unsigned long flags;

Jens Axboe's avatar
Jens Axboe committed
560 561 562 563
	atapi_status_t status;
	atapi_error_t error;

	status.all = stat;
564 565 566 567
	local_irq_set(flags);
	printk("%s: %s: status=0x%02x", drive->name, msg, stat);
#if FANCY_STATUS_DUMPS
	printk(" { ");
Jens Axboe's avatar
Jens Axboe committed
568
	if (status.b.bsy)
569 570
		printk("Busy ");
	else {
Jens Axboe's avatar
Jens Axboe committed
571 572 573 574 575 576 577
		if (status.b.drdy)	printk("DriveReady ");
		if (status.b.df)	printk("DeviceFault ");
		if (status.b.dsc)	printk("SeekComplete ");
		if (status.b.drq)	printk("DataRequest ");
		if (status.b.corr)	printk("CorrectedError ");
		if (status.b.idx)	printk("Index ");
		if (status.b.check)	printk("Error ");
578 579 580 581
	}
	printk("}");
#endif	/* FANCY_STATUS_DUMPS */
	printk("\n");
Jens Axboe's avatar
Jens Axboe committed
582 583 584
	if ((status.all & (status.b.bsy|status.b.check)) == status.b.check) {
		error.all = HWIF(drive)->INB(IDE_ERROR_REG);
		printk("%s: %s: error=0x%02x", drive->name, msg, error.all);
585
#if FANCY_STATUS_DUMPS
Jens Axboe's avatar
Jens Axboe committed
586 587 588 589 590 591
		if (error.b.ili)	printk("IllegalLengthIndication ");
		if (error.b.eom)	printk("EndOfMedia ");
		if (error.b.abrt)	printk("Aborted Command ");
		if (error.b.mcr)	printk("MediaChangeRequested ");
		if (error.b.sense_key)	printk("LastFailedSense 0x%02x ",
						error.b.sense_key);
592 593 594 595
#endif	/* FANCY_STATUS_DUMPS */
		printk("\n");
	}
	local_irq_restore(flags);
Jens Axboe's avatar
Jens Axboe committed
596
	return error.all;
597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619
}

/*
 * ide_error() takes action based on the error returned by the drive.
 */
ide_startstop_t ide_cdrom_error (ide_drive_t *drive, const char *msg, byte stat)
{
	struct request *rq;
	byte err;

	err = ide_cdrom_dump_status(drive, msg, stat);
	if (drive == NULL || (rq = HWGROUP(drive)->rq) == NULL)
		return ide_stopped;
	/* retry only "normal" I/O: */
	if ((rq->flags & REQ_DRIVE_CMD) || (rq->flags & REQ_DRIVE_TASK)) {
		rq->errors = 1;
		ide_end_drive_cmd(drive, stat, err);
		return ide_stopped;
	}

	if (stat & BUSY_STAT || ((stat & WRERR_STAT) && !drive->nowerr)) {
		/* other bits are useless when BUSY */
		rq->errors |= ERROR_RESET;
Jens Axboe's avatar
Jens Axboe committed
620 621
	} else {
		/* add decoding error stuff */
622
	}
Jens Axboe's avatar
Jens Axboe committed
623
	if (HWIF(drive)->INB(IDE_STATUS_REG) & (BUSY_STAT|DRQ_STAT))
624
		/* force an abort */
Jens Axboe's avatar
Jens Axboe committed
625
		HWIF(drive)->OUTB(WIN_IDLEIMMEDIATE,IDE_COMMAND_REG);
626
	if (rq->errors >= ERROR_MAX) {
Jens Axboe's avatar
Jens Axboe committed
627
		DRIVER(drive)->end_request(drive, 0, 0);
628 629 630 631 632 633 634 635 636 637 638 639 640 641 642
	} else {
		if ((rq->errors & ERROR_RESET) == ERROR_RESET) {
			++rq->errors;
			return ide_do_reset(drive);
		}
		++rq->errors;
	}
	return ide_stopped;
}

static void cdrom_end_request (ide_drive_t *drive, int uptodate)
{
	struct request *rq = HWGROUP(drive)->rq;

	if ((rq->flags & REQ_SENSE) && uptodate) {
643 644 645 646 647 648 649 650 651
		/* 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;
		
		if (failed && failed->sense)
			sense = failed->sense;

		cdrom_analyze_sense_data(drive, failed, sense);
652
	}
653

Jens Axboe's avatar
Jens Axboe committed
654 655
	if (blk_fs_request(rq) && !rq->current_nr_sectors)
		uptodate = 1;
656

Jens Axboe's avatar
Jens Axboe committed
657
	ide_end_request(drive, uptodate, rq->hard_cur_sectors);
658 659
}

660 661 662
/* Handle differences between SCSI and ATAPI packet commands */
static int pre_transform_command(struct request *);
static void post_transform_command(struct request *);
663 664 665 666 667 668 669 670 671 672

/* Returns 0 if the request should be continued.
   Returns 1 if the request was ended. */
static int cdrom_decode_status (ide_startstop_t *startstop, ide_drive_t *drive,
				int good_stat, int *stat_ret)
{
	struct request *rq = HWGROUP(drive)->rq;
	int stat, err, sense_key;
	
	/* Check for errors. */
Jens Axboe's avatar
Jens Axboe committed
673
	*stat_ret = stat = HWIF(drive)->INB(IDE_STATUS_REG);
674 675 676 677 678

	if (OK_STAT (stat, good_stat, BAD_R_STAT))
		return 0;

	/* Get the IDE error register. */
Jens Axboe's avatar
Jens Axboe committed
679
	err = HWIF(drive)->INB(IDE_ERROR_REG);
680 681 682 683 684 685 686 687 688 689 690 691 692
	sense_key = err >> 4;

	if (rq == NULL) {
		printk("%s: missing rq in cdrom_decode_status\n", drive->name);
		*startstop = ide_stopped;
		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. */

693 694
		rq->flags |= REQ_FAILED;
		cdrom_end_request(drive, 0);
695 696 697
		*startstop = DRIVER(drive)->error(drive, "request sense failure", stat);
		return 1;

698
	} else if (rq->flags & (REQ_PC | REQ_BLOCK_PC)) {
699 700
		/* All other functions, except for READ. */
		struct completion *wait = NULL;
701 702 703 704

		/* Fix up any SCSI command differences.. */
		if (rq->flags & REQ_BLOCK_PC)
			post_transform_command(rq);
705 706 707 708 709 710 711 712 713

		/* 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;
714
		} else if (!(rq->flags & REQ_QUIET)) {
715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732
			/* 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) {
			wait = rq->waiting;
			rq->waiting = NULL;
		}

733 734
		rq->flags |= REQ_FAILED;
		cdrom_end_request(drive, 0);
735 736

		if ((stat & ERR_STAT) != 0)
737
			cdrom_queue_request_sense(drive, wait, rq->sense, rq);
Jens Axboe's avatar
Jens Axboe committed
738
	} else if (blk_fs_request(rq)) {
739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767
		/* Handle errors from READ and WRITE 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(drive, 0);
		} 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(drive, 0);
		} 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(drive, 0);
		} else if ((err & ~ABRT_ERR) != 0) {
			/* Go to the default handler
			   for other errors. */
			*startstop = DRIVER(drive)->error(drive, "cdrom_decode_status", stat);
			return 1;
Jens Axboe's avatar
Jens Axboe committed
768 769 770 771 772
		} 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);
			cdrom_end_request(drive, 0);
773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800
		} else if ((++rq->errors > ERROR_MAX)) {
			/* We've racked up too many retries.  Abort. */
			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, NULL);
	} else
		blk_dump_rq_flags(rq, "ide-cd bad flags");

	/* Retry, or handle the next request. */
	*startstop = ide_stopped;
	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.
	 */
801
	switch (rq->cmd[0]) {
802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833
		case GPCMD_BLANK:
		case GPCMD_FORMAT_UNIT:
		case GPCMD_RESERVE_RZONE_TRACK:
			wait = WAIT_CMD;
			break;
		default:
			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;

	/* Wait for the controller to be idle. */
	if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY))
		return startstop;

	if (info->dma) {
		if (info->cmd == READ) {
Jens Axboe's avatar
Jens Axboe committed
834
			info->dma = !HWIF(drive)->ide_dma_read(drive);
835
		} else if (info->cmd == WRITE) {
Jens Axboe's avatar
Jens Axboe committed
836
			info->dma = !HWIF(drive)->ide_dma_write(drive);
837 838 839 840 841 842
		} else {
			printk("ide-cd: DMA set, but not allowed\n");
		}
	}

	/* Set up the controller registers. */
Jens Axboe's avatar
Jens Axboe committed
843 844 845
	HWIF(drive)->OUTB(info->dma, IDE_FEATURE_REG);
	HWIF(drive)->OUTB(0, IDE_IREASON_REG);
	HWIF(drive)->OUTB(0, IDE_SECTOR_REG);
846

Jens Axboe's avatar
Jens Axboe committed
847 848
	HWIF(drive)->OUTB(xferlen & 0xff, IDE_BCOUNTL_REG);
	HWIF(drive)->OUTB(xferlen >> 8  , IDE_BCOUNTH_REG);
849
	if (IDE_CONTROL_REG)
Jens Axboe's avatar
Jens Axboe committed
850
		HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG);
851 852
 
	if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) {
Jens Axboe's avatar
Jens Axboe committed
853
		if (HWGROUP(drive)->handler != NULL)
854 855
			BUG();
		ide_set_handler (drive, handler, WAIT_CMD, cdrom_timer_expiry);
Jens Axboe's avatar
Jens Axboe committed
856 857
		/* packet command */
		HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
858 859
		return ide_started;
	} else {
Jens Axboe's avatar
Jens Axboe committed
860 861
		/* packet command */
		HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG);
862 863 864 865 866 867 868 869 870 871 872 873 874 875
		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;
 */
static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive,
876
					  struct request *rq,
877 878
					  ide_handler_t *handler)
{
879 880 881
	unsigned char *cmd_buf	= rq->cmd;
	int cmd_len		= sizeof(rq->cmd);
	unsigned int timeout	= rq->timeout;
Jens Axboe's avatar
Jens Axboe committed
882
	struct cdrom_info *info = drive->driver_data;
883 884
	ide_startstop_t startstop;

Jens Axboe's avatar
Jens Axboe committed
885
	if (CDROM_CONFIG_FLAGS(drive)->drq_interrupt) {
886 887 888 889 890
		/* Here we should have been called after receiving an interrupt
		   from the device.  DRQ should how be set. */
		int stat_dum;

		/* Check for errors. */
Jens Axboe's avatar
Jens Axboe committed
891
		if (cdrom_decode_status(&startstop, drive, DRQ_STAT, &stat_dum))
892 893 894
			return startstop;
	} else {
		/* Otherwise, we must wait for DRQ to get set. */
Jens Axboe's avatar
Jens Axboe committed
895 896
		if (ide_wait_stat(&startstop, drive, DRQ_STAT,
				BUSY_STAT, WAIT_READY))
897 898 899 900 901 902 903
			return startstop;
	}

	if (HWGROUP(drive)->handler != NULL)	/* paranoia check */
		BUG();

	/* Arm the interrupt handler. */
Jens Axboe's avatar
Jens Axboe committed
904
	ide_set_handler(drive, handler, timeout, cdrom_timer_expiry);
905 906

	/* Send the command to the device. */
Jens Axboe's avatar
Jens Axboe committed
907
	HWIF(drive)->atapi_output_bytes(drive, cmd_buf, cmd_len);
Jens Axboe's avatar
Jens Axboe committed
908 909 910 911 912

	/* Start the DMA if need be */
	if (info->dma)
		(void) HWIF(drive)->ide_dma_begin(drive);

913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949
	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 (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) {
Jens Axboe's avatar
Jens Axboe committed
950
		HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE);
951 952 953 954 955 956 957 958 959
		--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];
Jens Axboe's avatar
Jens Axboe committed
960
		HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
		--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;
Jens Axboe's avatar
Jens Axboe committed
986
			HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof (dum));
987 988 989 990 991 992
			len -= sizeof (dum);
		}
	} else  if (ireason == 1) {
		/* Some drives (ASUS) seem to tell us that status
		 * info is available. just get it and ignore.
		 */
Jens Axboe's avatar
Jens Axboe committed
993
		(void) HWIF(drive)->INB(IDE_STATUS_REG);
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
		return 0;
	} 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(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;
Jens Axboe's avatar
Jens Axboe committed
1013 1014
	u8 lowcyl = 0, highcyl = 0;
	int dma = info->dma, dma_error = 0;
1015 1016 1017 1018 1019 1020 1021
	ide_startstop_t startstop;

	struct request *rq = HWGROUP(drive)->rq;

	/* Check for errors. */
	if (dma) {
		info->dma = 0;
Jens Axboe's avatar
Jens Axboe committed
1022 1023
		if ((dma_error = HWIF(drive)->ide_dma_end(drive)))
			HWIF(drive)->ide_dma_off(drive);
1024 1025 1026 1027 1028 1029 1030
	}

	if (cdrom_decode_status (&startstop, drive, 0, &stat))
		return startstop;
 
	if (dma) {
		if (!dma_error) {
Jens Axboe's avatar
Jens Axboe committed
1031
			ide_end_request(drive, 1, rq->nr_sectors);
1032 1033 1034 1035 1036 1037
			return ide_stopped;
		} else
			return DRIVER(drive)->error(drive, "dma error", stat);
	}

	/* Read the interrupt reason and the transfer length. */
Jens Axboe's avatar
Jens Axboe committed
1038 1039 1040 1041 1042
	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);
1043 1044 1045 1046 1047 1048 1049 1050

	/* 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 (%d blocks)\n",
				drive->name, rq->current_nr_sectors);
1051
			rq->flags |= REQ_FAILED;
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
			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 ("%s: cdrom_read_intr: Bad transfer size %d\n",
			drive->name, len);
Jens Axboe's avatar
Jens Axboe committed
1068
		if (CDROM_CONFIG_FLAGS(drive)->limit_nframes)
1069 1070 1071
			printk ("  This drive is not supported by this version of the driver\n");
		else {
			printk ("  Trying to limit transfer sizes\n");
Jens Axboe's avatar
Jens Axboe committed
1072
			CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087
		}
		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((int)(rq->current_nr_sectors - bio_sectors(rq->bio)), sectors_to_transfer);

	while (nskip > 0) {
		/* We need to throw away a sector. */
		char dum[SECTOR_SIZE];
Jens Axboe's avatar
Jens Axboe committed
1088
		HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum));
1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118

		--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 (sectors_to_transfer,
					     rq->current_nr_sectors);

			/* Read this_transfer sectors
			   into the current buffer. */
			while (this_transfer > 0) {
Jens Axboe's avatar
Jens Axboe committed
1119
				HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE);
1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
				rq->buffer += SECTOR_SIZE;
				--rq->nr_sectors;
				--rq->current_nr_sectors;
				++rq->sector;
				--this_transfer;
				--sectors_to_transfer;
			}
		}
	}

	if (HWGROUP(drive)->handler != NULL)    /* paranoia check */
		BUG();

	/* Done moving data!  Wait for another interrupt. */
	ide_set_handler(drive, &cdrom_read_intr, WAIT_CMD, 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;

	/* 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_sectors(rq->bio) &&
	    (rq->sector % SECTORS_PER_FRAME) != 0) {
Jens Axboe's avatar
Jens Axboe committed
1185
		printk("%s: cdrom_read_from_buffer: buffer botch (%ld)\n",
1186
			drive->name, (long)rq->sector);
1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243
		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;
	int nsect, sector, nframes, frame, nskip;

	/* Number of sectors to transfer. */
	nsect = rq->nr_sectors;

	/* 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 != bio_sectors(rq->bio) &&
			(rq->sector % CD_FRAMESIZE != 0)) {
			printk ("%s: cdrom_start_read_continuation: buffer botch (%u)\n",
				drive->name, rq->current_nr_sectors);
			cdrom_end_request(drive, 0);
			return ide_stopped;
		}
		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. For
	   some drives we need to limit this even more. */
	nframes = MIN (nframes, (CDROM_CONFIG_FLAGS (drive)->limit_nframes) ?
		(65534 / CD_FRAMESIZE) : 65535);

	/* Set up the command */
1244
	rq->timeout = WAIT_CMD;
1245 1246

	/* Send the command to the drive and return. */
1247
	return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr);
1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292
}


#define IDECD_SEEK_THRESHOLD	(1000)			/* 1000 blocks */
#define IDECD_SEEK_TIMER	(5 * WAIT_MIN_SLEEP)	/* 100 ms */
#define IDECD_SEEK_TIMEOUT     WAIT_CMD			/* 10 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;
	ide_startstop_t startstop;

	if (cdrom_decode_status (&startstop, drive, 0, &stat))
		return startstop;
	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
			 */
#if 0
			printk("%s: disabled DSC seek overlap\n", drive->name);
#endif
			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;
	int sector, frame, nskip;

	sector = rq->sector;
	nskip = (sector % SECTORS_PER_FRAME);
	if (nskip > 0)
		sector -= nskip;
	frame = sector / SECTORS_PER_FRAME;

	memset(rq->cmd, 0, sizeof(rq->cmd));
1293 1294
	rq->cmd[0] = GPCMD_SEEK;
	put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]);
1295

1296 1297
	rq->timeout = WAIT_CMD;
	return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr);
1298 1299 1300 1301 1302 1303 1304 1305 1306
}

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;
Jens Axboe's avatar
Jens Axboe committed
1307
	return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation);
1308 1309 1310 1311 1312 1313 1314 1315
}

/* 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;
1316

1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
		rq->buffer = bio_data(rq->bio);
		rq->nr_sectors += n;
		rq->sector -= n;
	}
	rq->hard_cur_sectors = rq->current_nr_sectors = bio_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;

	/* 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. */
	if (drive->using_dma && (rq->sector % SECTORS_PER_FRAME == 0) &&
				(rq->nr_sectors % SECTORS_PER_FRAME == 0))
		info->dma = 1;
	else
		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.
 */

/* Forward declarations. */
static int cdrom_lockdoor(ide_drive_t *drive, int lockflag,
			  struct request_sense *sense);

/* Interrupt routine for packet command completion. */
static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive)
{
	int ireason, len, stat, thislen;
	struct request *rq = HWGROUP(drive)->rq;
	ide_startstop_t startstop;
Jens Axboe's avatar
Jens Axboe committed
1374
	u8 lowcyl = 0, highcyl = 0;
1375 1376

	/* Check for errors. */
Jens Axboe's avatar
Jens Axboe committed
1377
	if (cdrom_decode_status(&startstop, drive, 0, &stat))
1378 1379 1380
		return startstop;

	/* Read the interrupt reason and the transfer length. */
Jens Axboe's avatar
Jens Axboe committed
1381 1382 1383 1384 1385
	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);
1386 1387 1388 1389 1390 1391

	/* 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. */
1392 1393 1394 1395 1396 1397
		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;
1398 1399 1400
			}
		}

1401
		if (rq->data_len == 0)
1402 1403 1404 1405 1406 1407 1408 1409 1410
			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);
			*/
1411 1412
			rq->flags |= REQ_FAILED;
			cdrom_end_request(drive, 0);
1413 1414 1415 1416 1417
		}
		return ide_stopped;
	}

	/* Figure out how much data to transfer. */
1418
	thislen = rq->data_len;
1419 1420 1421 1422
	if (thislen > len) thislen = len;

	/* The drive wants to be written to. */
	if ((ireason & 3) == 0) {
1423 1424
		if (!rq->data)
			goto confused;
1425
		/* Transfer the data. */
1426
		HWIF(drive)->atapi_output_bytes(drive, rq->data, thislen);
1427 1428 1429 1430 1431

		/* If we haven't moved enough data to satisfy the drive,
		   add some padding. */
		while (len > thislen) {
			int dum = 0;
Jens Axboe's avatar
Jens Axboe committed
1432 1433
			HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof(dum));
			len -= sizeof(dum);
1434 1435 1436
		}

		/* Keep count of how much data we've moved. */
1437 1438
		rq->data += thislen;
		rq->data_len -= thislen;
1439 1440 1441 1442
	}

	/* Same drill for reading. */
	else if ((ireason & 3) == 2) {
1443 1444
		if (!rq->data)
			goto confused;
1445
		/* Transfer the data. */
1446
		HWIF(drive)->atapi_input_bytes(drive, rq->data, thislen);
1447 1448 1449 1450 1451

		/* If we haven't moved enough data to satisfy the drive,
		   add some padding. */
		while (len > thislen) {
			int dum = 0;
Jens Axboe's avatar
Jens Axboe committed
1452 1453
			HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum));
			len -= sizeof(dum);
1454 1455 1456
		}

		/* Keep count of how much data we've moved. */
1457 1458
		rq->data += thislen;
		rq->data_len -= thislen;
1459
	} else {
1460
confused:
1461 1462 1463
		printk ("%s: cdrom_pc_intr: The drive "
			"appears confused (ireason = 0x%2x)\n",
			drive->name, ireason);
1464
		rq->flags |= REQ_FAILED;
1465 1466
	}

Jens Axboe's avatar
Jens Axboe committed
1467
	if (HWGROUP(drive)->handler != NULL)
1468 1469 1470
		BUG();

	/* Now we wait for another interrupt. */
Jens Axboe's avatar
Jens Axboe committed
1471
	ide_set_handler(drive, &cdrom_pc_intr, WAIT_CMD, cdrom_timer_expiry);
1472 1473 1474 1475 1476 1477 1478 1479
	return ide_started;
}


static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive)
{
	struct request *rq = HWGROUP(drive)->rq;

1480 1481
	if (!rq->timeout)
		rq->timeout = WAIT_CMD;
1482 1483

	/* Send the command to the drive and return. */
1484
	return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr);
1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495
}


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;
1496 1497
	rq->flags &= ~REQ_FAILED;
	len = rq->data_len;
1498 1499

	/* Start sending the command to the drive. */
Jens Axboe's avatar
Jens Axboe committed
1500
	return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation);
1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517
}


/* Sleep for TIME jiffies.
   Not to be called from an interrupt handler. */
static
void cdrom_sleep (int time)
{
	int sleep = time;

	do {
		set_current_state(TASK_INTERRUPTIBLE);
		sleep = schedule_timeout(sleep);
	} while (sleep);
}

static
1518
int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq)
1519 1520 1521
{
	struct request_sense sense;
	int retries = 10;
1522
	unsigned int flags = rq->flags;
1523

1524 1525
	if (rq->sense == NULL)
		rq->sense = &sense;
1526 1527 1528

	/* Start of retry loop. */
	do {
1529 1530 1531 1532 1533 1534 1535
		int error;
		unsigned long time = jiffies;
		rq->flags = flags;

		error = ide_do_drive_cmd(drive, rq, ide_wait);
		time = jiffies - time;

1536 1537
		/* FIXME: we should probably abort/retry or something 
		 * in case of failure */
1538
		if (rq->flags & REQ_FAILED) {
1539 1540 1541
			/* The request failed.  Retry if it was due to a unit
			   attention status
			   (usually means media was changed). */
1542
			struct request_sense *reqbuf = rq->sense;
1543 1544

			if (reqbuf->sense_key == UNIT_ATTENTION)
Jens Axboe's avatar
Jens Axboe committed
1545
				cdrom_saw_media_change(drive);
1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559
			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. */
				cdrom_sleep(2 * HZ);
			} else {
				/* Otherwise, don't retry. */
				retries = 0;
			}
			--retries;
		}

		/* End of retry loop. */
1560
	} while ((rq->flags & REQ_FAILED) && retries >= 0);
1561 1562

	/* Return an error if the command failed. */
1563
	return (rq->flags & REQ_FAILED) ? -EIO : 0;
1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585
}

/*
 * 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 data from us.
	 */
	ireason &= 3;

	if (ireason == 2) {
		/* Whoops... The drive wants to send data. */
		printk("%s: cdrom_write_intr: wrong transfer direction!\n",
			drive->name);

		/* Throw some data at the drive so it doesn't hang
		   and quit this request. */
		while (len > 0) {
			int dum = 0;
Jens Axboe's avatar
Jens Axboe committed
1586
			HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof(dum));
1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
			len -= sizeof(dum);
		}
	} else {
		/* Drive wants a command packet, or invalid ireason... */
		printk("%s: cdrom_write_intr: bad interrupt reason %d\n",
			drive->name, ireason);
	}

	cdrom_end_request(drive, 0);
	return 1;
}

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;
Jens Axboe's avatar
Jens Axboe committed
1603 1604
	int dma_error = 0, dma = info->dma;
	u8 lowcyl = 0, highcyl = 0;
1605 1606 1607 1608 1609 1610 1611
	ide_startstop_t startstop;

	struct request *rq = HWGROUP(drive)->rq;

	/* Check for errors. */
	if (dma) {
		info->dma = 0;
Jens Axboe's avatar
Jens Axboe committed
1612
		if ((dma_error = HWIF(drive)->ide_dma_end(drive))) {
1613
			printk("ide-cd: write dma error\n");
Jens Axboe's avatar
Jens Axboe committed
1614
			HWIF(drive)->ide_dma_off(drive);
1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629
		}
	}

	if (cdrom_decode_status(&startstop, drive, 0, &stat)) {
		printk("ide-cd: write_intr decode_status bad\n");
		return startstop;
	}
 
	/*
	 * using dma, transfer is complete now
	 */
	if (dma) {
		if (dma_error)
			return DRIVER(drive)->error(drive, "dma error", stat);

Jens Axboe's avatar
Jens Axboe committed
1630
		ide_end_request(drive, 1, rq->nr_sectors);
1631 1632 1633 1634
		return ide_stopped;
	}

	/* Read the interrupt reason and the transfer length. */
Jens Axboe's avatar
Jens Axboe committed
1635 1636 1637 1638 1639
	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);
1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679

	/* 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("%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 (ireason & 3)
		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("ide-cd: write_intr: oops\n");
			break;
		}

		/*
		 * Figure out how many sectors we can transfer
		 */
		this_transfer = MIN(sectors_to_transfer,rq->current_nr_sectors);

		while (this_transfer > 0) {
Jens Axboe's avatar
Jens Axboe committed
1680
			HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE);
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712
			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);
	}

	if (HWGROUP(drive)->handler != NULL)	/* paranoia check */
		BUG();

	/* re-arm handler */
	ide_set_handler(drive, &cdrom_write_intr, 5 * WAIT_CMD, NULL);
	return ide_started;
}

static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive)
{
	struct request *rq = HWGROUP(drive)->rq;
	unsigned nframes, frame;

	nframes = rq->nr_sectors >> 2;
	frame = rq->sector >> 2;

#if 0	/* the immediate bit */
1713
	rq->cmd[1] = 1 << 3;
1714
#endif
1715
	rq->timeout = 2 * WAIT_CMD;
1716

1717
	return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr);
1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750
}

static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq)
{
	struct cdrom_info *info = drive->driver_data;

	/*
	 * writes *must* be 2kB frame aligned
	 */
	if ((rq->nr_sectors & 3) || (rq->sector & 3)) {
		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!) 2KB aligned */
	info->dma = drive->using_dma ? 1 : 0;
	info->cmd = WRITE;

	/* Start sending the read request to the drive. */
	return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont);
}

1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780
/*
 * Most of the SCSI commands are supported directly by ATAPI devices.
 * This transform handles the few exceptions.
 */
static int pre_transform_command(struct request *req)
{
	u8 *c = req->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);
		return 0;
	}

	/* These also need fixup, not done yet */
	if (c[0] == MODE_SENSE || c[0] == MODE_SELECT)
		return -EINVAL;

	return 0;
}

static void post_transform_command(struct request *req)
{
}

1781 1782 1783
static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq)
{
	ide_startstop_t startstop;
1784
	struct cdrom_info *info;
1785

1786 1787 1788 1789 1790 1791 1792 1793 1794 1795
	if (pre_transform_command(rq) < 0) {
		cdrom_end_request(drive, 0);
		return ide_stopped;
	}

	rq->flags |= REQ_QUIET;

	info = drive->driver_data;
	info->dma = 0;
	info->cmd = 0;
1796

1797 1798
	/* Start sending the command to the drive. */
	startstop = cdrom_start_packet_command(drive, rq->data_len, cdrom_do_pc_continuation);
1799 1800 1801 1802 1803 1804 1805 1806

	return startstop;
}

/****************************************************************************
 * cdrom driver request routine.
 */
static ide_startstop_t
1807
ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block)
1808 1809 1810 1811
{
	ide_startstop_t action;
	struct cdrom_info *info = drive->driver_data;

Jens Axboe's avatar
Jens Axboe committed
1812
	if (blk_fs_request(rq)) {
1813
		if (CDROM_CONFIG_FLAGS(drive)->seeking) {
1814
			unsigned long elapsed = jiffies - info->start_seek;
Jens Axboe's avatar
Jens Axboe committed
1815
			int stat = HWIF(drive)->INB(IDE_STATUS_REG);
1816 1817

			if ((stat & SEEK_STAT) != SEEK_STAT) {
1818
				if (elapsed < IDECD_SEEK_TIMEOUT) {
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837
					ide_stall_queue(drive, IDECD_SEEK_TIMER);
					return ide_stopped;
				}
				printk ("%s: DSC timeout\n", drive->name);
			}
			CDROM_CONFIG_FLAGS(drive)->seeking = 0;
		}
		if (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);
1838 1839
	} else if (rq->flags & REQ_BLOCK_PC) {
		return cdrom_do_block_pc(drive, rq);
1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
	} 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)
{
1910
	struct request req;
1911 1912 1913
	struct cdrom_info *info = drive->driver_data;
	struct cdrom_device_info *cdi = &info->devinfo;

1914
	cdrom_prepare_request(&req);
1915

1916 1917
	req.sense = sense;
	req.cmd[0] = GPCMD_TEST_UNIT_READY;
1918 1919 1920 1921 1922

#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   */

1923
	req.cmd[7] = cdi->sanyo_slot % 3;
1924 1925
#endif /* not STANDARD_ATAPI */

1926
	return cdrom_queue_packet_command(drive, &req);
1927 1928 1929 1930 1931 1932 1933 1934
}


/* 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;
1935
	struct request req;
1936 1937 1938 1939 1940 1941 1942 1943 1944
	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 {
1945 1946 1947 1948 1949
		cdrom_prepare_request(&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);
1950 1951 1952 1953 1954 1955 1956 1957 1958
	}

	/* 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 ("%s: door locking not supported\n",
			drive->name);
Jens Axboe's avatar
Jens Axboe committed
1959
		CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
1960 1961 1962 1963 1964 1965 1966 1967
		stat = 0;
	}
	
	/* no medium, that's alright. */
	if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a)
		stat = 0;

	if (stat == 0)
Jens Axboe's avatar
Jens Axboe committed
1968
		CDROM_STATE_FLAGS(drive)->door_locked = lockflag;
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978

	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)
{
1979
	struct request req;
1980 1981 1982 1983 1984 1985 1986 1987

	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;

1988
	cdrom_prepare_request(&req);
1989

1990 1991 1992 1993
	req.sense = sense;
	req.cmd[0] = GPCMD_START_STOP_UNIT;
	req.cmd[4] = 0x02 + (ejectflag != 0);
	return cdrom_queue_packet_command(drive, &req);
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004
}

static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
			       struct request_sense *sense)
{
	struct {
		__u32 lba;
		__u32 blocklen;
	} capbuf;

	int stat;
2005
	struct request req;
2006

2007
	cdrom_prepare_request(&req);
2008

2009 2010 2011 2012
	req.sense = sense;
	req.cmd[0] = GPCMD_READ_CDVD_CAPACITY;
	req.data = (char *)&capbuf;
	req.data_len = sizeof(capbuf);
2013

2014
	stat = cdrom_queue_packet_command(drive, &req);
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024
	if (stat == 0)
		*capacity = 1 + be32_to_cpu(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 request_sense *sense)
{
2025
	struct request req;
2026

2027
	cdrom_prepare_request(&req);
2028

2029 2030 2031 2032 2033 2034 2035 2036 2037
	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);
2038 2039

	if (msf_flag)
2040
		req.cmd[1] = 2;
2041

2042
	return cdrom_queue_packet_command(drive, &req);
2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081
}


/* 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;

	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 ("%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;

	/* 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
Jens Axboe's avatar
Jens Axboe committed
2082 2083 2084
	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);
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121
	}
#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
Jens Axboe's avatar
Jens Axboe committed
2122
		if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) {
2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138
			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
Jens Axboe's avatar
Jens Axboe committed
2139 2140 2141
	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);
2142 2143 2144 2145 2146
	}
#endif  /* not STANDARD_ATAPI */

	for (i=0; i<=ntracks; i++) {
#if ! STANDARD_ATAPI
Jens Axboe's avatar
Jens Axboe committed
2147 2148 2149 2150
		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);
2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171
		}
#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, 1, 1, (char *)&ms_tmp,
					   sizeof(ms_tmp), sense);
		if (stat) return stat;
	} else {
		ms_tmp.ent.addr.msf.minute = 0;
		ms_tmp.ent.addr.msf.second = 2;
		ms_tmp.ent.addr.msf.frame  = 0;
		ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT;
	}

#if ! STANDARD_ATAPI
Jens Axboe's avatar
Jens Axboe committed
2172
	if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd)
2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188
		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_get_last_written(cdi, (long *) &toc->capacity);
	if (stat)
		stat = cdrom_read_capacity(drive, &toc->capacity, sense);
	if (stat)
		toc->capacity = 0x1fffff;

2189
	set_capacity(drive->disk, toc->capacity * SECTORS_PER_FRAME);
2190 2191

	/* Remember that we've read this stuff. */
Jens Axboe's avatar
Jens Axboe committed
2192
	CDROM_STATE_FLAGS(drive)->toc_valid = 1;
2193 2194 2195 2196 2197 2198 2199 2200

	return 0;
}


static int cdrom_read_subchannel(ide_drive_t *drive, int format, char *buf,
				 int buflen, struct request_sense *sense)
{
2201
	struct request req;
2202

2203
	cdrom_prepare_request(&req);
2204

2205 2206 2207 2208 2209 2210 2211 2212 2213 2214
	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);
2215 2216 2217 2218 2219 2220 2221
}

/* 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)
{
2222 2223
	struct request req;
	cdrom_prepare_request(&req);
2224

2225
	req.sense = sense;
2226 2227 2228 2229 2230
	if (speed == 0)
		speed = 0xffff; /* set to max */
	else
		speed *= 177;   /* Nx to kbytes/s */

2231
	req.cmd[0] = GPCMD_SET_SPEED;
2232
	/* Read Drive speed in kbytes/second MSB */
2233
	req.cmd[2] = (speed >> 8) & 0xff;	
2234
	/* Read Drive speed in kbytes/second LSB */
2235
	req.cmd[3] = speed & 0xff;
2236 2237 2238 2239
	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 */
2240
		req.cmd[4] = (speed >> 8) & 0xff;
2241
		/* Write Drive speed in kbytes/second LSB */
2242
		req.cmd[5] = speed & 0xff;
2243 2244
       }

2245
	return cdrom_queue_packet_command(drive, &req);
2246 2247 2248 2249 2250
}

static int cdrom_play_audio(ide_drive_t *drive, int lba_start, int lba_end)
{
	struct request_sense sense;
2251
	struct request req;
2252

2253
	cdrom_prepare_request(&req);
2254

2255 2256 2257 2258
	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]);
2259

2260
	return cdrom_queue_packet_command(drive, &req);
2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293
}

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 cdrom_generic_command *cgc)
{
2294
	struct request req;
2295 2296 2297 2298 2299 2300 2301 2302
	ide_drive_t *drive = (ide_drive_t*) cdi->handle;

	if (cgc->timeout <= 0)
		cgc->timeout = WAIT_CMD;

	/* here we queue the commands from the uniform CD-ROM
	   layer. the packet must be complete, as we do not
	   touch it at all. */
2303 2304
	cdrom_prepare_request(&req);
	memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE);
Jens Axboe's avatar
Jens Axboe committed
2305 2306
	if (cgc->sense)
		memset(cgc->sense, 0, sizeof(struct request_sense));
2307 2308 2309 2310 2311 2312 2313 2314 2315
	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);
2316
	if (!cgc->stat)
2317
		cgc->buflen -= req.data_len;
2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423
	return cgc->stat;
}

static
int ide_cdrom_dev_ioctl (struct cdrom_device_info *cdi,
			 unsigned int cmd, unsigned long arg)
{
	struct cdrom_generic_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 *) 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 *) 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;

Jens Axboe's avatar
Jens Axboe committed
2424
		stat = cdrom_get_toc_entry(drive, tocentry->cdte_track, &toce);
2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452
		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;

2453
	cdrom_prepare_request(&req);
2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495
	req.flags = REQ_SPECIAL;
	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;

Jens Axboe's avatar
Jens Axboe committed
2496
	if ((stat = cdrom_select_speed(drive, speed, &sense)) < 0)
2497 2498
		return stat;

Jens Axboe's avatar
Jens Axboe committed
2499
        cdi->speed = CDROM_STATE_FLAGS(drive)->current_speed;
2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591
        return 0;
}

static
int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr)
{
	ide_drive_t *drive = (ide_drive_t*) cdi->handle;

	if (slot_nr == CDSL_CURRENT) {
		struct request_sense sense;
		int stat = cdrom_check_status(drive, &sense);
		if (stat == 0 || sense.sense_key == UNIT_ATTENTION)
			return CDS_DISC_OK;

		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 && sense.ascq == 1)
				return CDS_NO_DISC;
			else
				return CDS_TRAY_OPEN;
		}

		return CDS_DRIVE_NOT_READY;
	}
	return -EINVAL;
}

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);
Jens Axboe's avatar
Jens Axboe committed
2592 2593
		retval = CDROM_STATE_FLAGS(drive)->media_changed;
		CDROM_STATE_FLAGS(drive)->media_changed = 0;
2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622
		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)
{
}



/****************************************************************************
 * Device initialization.
 */
static struct cdrom_device_ops ide_cdrom_dops = {
2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635
	.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 |
2636 2637 2638 2639 2640 2641
				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,
2642
	.generic_packet		= ide_cdrom_packet,
2643 2644 2645 2646 2647 2648 2649 2650 2651
};

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;
Jens Axboe's avatar
Jens Axboe committed
2652 2653
	devinfo->speed = CDROM_STATE_FLAGS(drive)->current_speed;
	devinfo->capacity = nslots;
2654 2655 2656 2657
	devinfo->handle = (void *) drive;
	strcpy(devinfo->name, drive->name);
	
	/* set capability mask to match the probe. */
Jens Axboe's avatar
Jens Axboe committed
2658
	if (!CDROM_CONFIG_FLAGS(drive)->cd_r)
2659
		devinfo->mask |= CDC_CD_R;
Jens Axboe's avatar
Jens Axboe committed
2660
	if (!CDROM_CONFIG_FLAGS(drive)->cd_rw)
2661
		devinfo->mask |= CDC_CD_RW;
Jens Axboe's avatar
Jens Axboe committed
2662
	if (!CDROM_CONFIG_FLAGS(drive)->dvd)
2663
		devinfo->mask |= CDC_DVD;
Jens Axboe's avatar
Jens Axboe committed
2664
	if (!CDROM_CONFIG_FLAGS(drive)->dvd_r)
2665
		devinfo->mask |= CDC_DVD_R;
Jens Axboe's avatar
Jens Axboe committed
2666
	if (!CDROM_CONFIG_FLAGS(drive)->dvd_ram)
2667
		devinfo->mask |= CDC_DVD_RAM;
Jens Axboe's avatar
Jens Axboe committed
2668
	if (!CDROM_CONFIG_FLAGS(drive)->is_changer)
2669
		devinfo->mask |= CDC_SELECT_DISC;
Jens Axboe's avatar
Jens Axboe committed
2670
	if (!CDROM_CONFIG_FLAGS(drive)->audio_play)
2671
		devinfo->mask |= CDC_PLAY_AUDIO;
Jens Axboe's avatar
Jens Axboe committed
2672
	if (!CDROM_CONFIG_FLAGS(drive)->close_tray)
2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720
		devinfo->mask |= CDC_CLOSE_TRAY;

	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 cdrom_generic_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 (drive->id) {
		if (!(!strcmp(drive->id->model, "ATAPI CD ROM DRIVE 50X MAX") ||
		    !strcmp(drive->id->model, "WPI CDS-32X")))
			size -= sizeof(cap->pad);
	}

	/* 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;
	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;

Jens Axboe's avatar
Jens Axboe committed
2721 2722 2723
	if (CDROM_CONFIG_FLAGS(drive)->nec260) {
		CDROM_CONFIG_FLAGS(drive)->no_eject = 0;                       
		CDROM_CONFIG_FLAGS(drive)->audio_play = 1;       
2724 2725 2726 2727 2728 2729 2730
		return nslots;
	}

	if (ide_cdrom_get_capabilities(drive, &cap))
		return 0;

	if (cap.lock == 0)
Jens Axboe's avatar
Jens Axboe committed
2731
		CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
2732
	if (cap.eject)
Jens Axboe's avatar
Jens Axboe committed
2733
		CDROM_CONFIG_FLAGS(drive)->no_eject = 0;
2734
	if (cap.cd_r_write)
Jens Axboe's avatar
Jens Axboe committed
2735
		CDROM_CONFIG_FLAGS(drive)->cd_r = 1;
2736
	if (cap.cd_rw_write)
Jens Axboe's avatar
Jens Axboe committed
2737
		CDROM_CONFIG_FLAGS(drive)->cd_rw = 1;
2738
	if (cap.test_write)
Jens Axboe's avatar
Jens Axboe committed
2739
		CDROM_CONFIG_FLAGS(drive)->test_write = 1;
2740
	if (cap.dvd_ram_read || cap.dvd_r_read || cap.dvd_rom)
Jens Axboe's avatar
Jens Axboe committed
2741
		CDROM_CONFIG_FLAGS(drive)->dvd = 1;
2742
	if (cap.dvd_ram_write)
Jens Axboe's avatar
Jens Axboe committed
2743
		CDROM_CONFIG_FLAGS(drive)->dvd_ram = 1;
2744
	if (cap.dvd_r_write)
Jens Axboe's avatar
Jens Axboe committed
2745
		CDROM_CONFIG_FLAGS(drive)->dvd_r = 1;
2746
	if (cap.audio_play)
Jens Axboe's avatar
Jens Axboe committed
2747
		CDROM_CONFIG_FLAGS(drive)->audio_play = 1;
2748
	if (cap.mechtype == mechtype_caddy || cap.mechtype == mechtype_popup)
Jens Axboe's avatar
Jens Axboe committed
2749
		CDROM_CONFIG_FLAGS(drive)->close_tray = 0;
2750 2751 2752 2753

	/* Some drives used by Apple don't advertise audio play
	 * but they do support reading TOC & audio datas
	 */
Jens Axboe's avatar
Jens Axboe committed
2754 2755 2756 2757 2758
	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;
2759 2760 2761

#if ! STANDARD_ATAPI
	if (cdi->sanyo_slot > 0) {
Jens Axboe's avatar
Jens Axboe committed
2762
		CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
2763 2764 2765 2766 2767 2768 2769 2770
		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) {
Jens Axboe's avatar
Jens Axboe committed
2771 2772
			CDROM_CONFIG_FLAGS(drive)->is_changer = 1;
			CDROM_CONFIG_FLAGS(drive)->supp_disc_present = 1;
2773 2774 2775 2776
		}
	}

	/* The ACER/AOpen 24X cdrom has the speed fields byte-swapped */
Jens Axboe's avatar
Jens Axboe committed
2777 2778 2779
	if (drive->id && !drive->id->model[0] &&
	    !strncmp(drive->id->fw_rev, "241N", 4)) {
		CDROM_STATE_FLAGS(drive)->current_speed  = 
2780
			(((unsigned int)cap.curspeed) + (176/2)) / 176;
Jens Axboe's avatar
Jens Axboe committed
2781
		CDROM_CONFIG_FLAGS(drive)->max_speed = 
2782 2783
			(((unsigned int)cap.maxspeed) + (176/2)) / 176;
	} else {
Jens Axboe's avatar
Jens Axboe committed
2784
		CDROM_STATE_FLAGS(drive)->current_speed  = 
2785
			(ntohs(cap.curspeed) + (176/2)) / 176;
Jens Axboe's avatar
Jens Axboe committed
2786
		CDROM_CONFIG_FLAGS(drive)->max_speed = 
2787 2788 2789 2790 2791 2792 2793 2794 2795 2796
			(ntohs(cap.maxspeed) + (176/2)) / 176;
	}

	/* don't print speed if the drive reported 0.
	 */
	printk("%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");

Jens Axboe's avatar
Jens Axboe committed
2797 2798 2799 2800
	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" : "");
2801

Jens Axboe's avatar
Jens Axboe committed
2802 2803 2804 2805
        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" : "");
2806

Jens Axboe's avatar
Jens Axboe committed
2807 2808
        if (CDROM_CONFIG_FLAGS(drive)->is_changer) 
        	printk(" changer w/%d slots", nslots);
2809
        else 	
Jens Axboe's avatar
Jens Axboe committed
2810
        	printk(" drive");
2811

Jens Axboe's avatar
Jens Axboe committed
2812
	printk(", %dkB Cache", be16_to_cpu(cap.buffer_size));
2813 2814 2815

#ifdef CONFIG_BLK_DEV_IDEDMA
	if (drive->using_dma)
Jens Axboe's avatar
Jens Axboe committed
2816
		(void) HWIF(drive)->ide_dma_verbose(drive);
2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833
#endif /* CONFIG_BLK_DEV_IDEDMA */
	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 ll_10byte_cmd_build(request_queue_t *q, struct request *rq)
{
	int hard_sect = queue_hardsect_size(q);
2834
	long block = (long)rq->hard_sector / (hard_sect >> 9);
2835 2836 2837 2838 2839
	unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9);

	if (!(rq->flags & REQ_CMD))
		return 0;

2840 2841
	BUG_ON(sizeof(rq->hard_sector) > 4 && (rq->hard_sector >> 32));

2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879
	if (rq->hard_nr_sectors != rq->nr_sectors) {
		printk(KERN_ERR "ide-cd: hard_nr_sectors differs from nr_sectors! %lu %lu\n",
				rq->nr_sectors, rq->hard_nr_sectors);
	}
	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;

	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;

	/*
	 * default to read-only always and fix latter at the bottom
	 */
2880
	set_device_ro(mk_kdev(drive->disk->major, drive->disk->first_minor), 1);
2881 2882 2883 2884 2885 2886 2887
	blk_queue_hardsect_size(&drive->queue, CD_FRAMESIZE);

	blk_queue_prep_rq(&drive->queue, ll_10byte_cmd_build);

	drive->special.all	= 0;
	drive->ready_stat	= 0;

Jens Axboe's avatar
Jens Axboe committed
2888 2889 2890
	CDROM_STATE_FLAGS(drive)->media_changed = 1;
	CDROM_STATE_FLAGS(drive)->toc_valid     = 0;
	CDROM_STATE_FLAGS(drive)->door_locked   = 0;
2891 2892

#if NO_DOOR_LOCKING
Jens Axboe's avatar
Jens Axboe committed
2893
	CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1;
2894
#else
Jens Axboe's avatar
Jens Axboe committed
2895
	CDROM_CONFIG_FLAGS(drive)->no_doorlock = 0;
2896 2897 2898
#endif

	if (drive->id != NULL)
Jens Axboe's avatar
Jens Axboe committed
2899
		CDROM_CONFIG_FLAGS(drive)->drq_interrupt =
2900 2901
			((drive->id->config & 0x0060) == 0x20);
	else
Jens Axboe's avatar
Jens Axboe committed
2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914
		CDROM_CONFIG_FLAGS(drive)->drq_interrupt = 0;

	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;
2915 2916
	
	/* limit transfer size per interrupt. */
Jens Axboe's avatar
Jens Axboe committed
2917
	CDROM_CONFIG_FLAGS(drive)->limit_nframes = 0;
2918 2919 2920
	if (drive->id != NULL) {
		/* a testament to the nice quality of Samsung drives... */
		if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2430"))
Jens Axboe's avatar
Jens Axboe committed
2921
			CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
2922
		else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2432"))
Jens Axboe's avatar
Jens Axboe committed
2923
			CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1;
2924 2925 2926 2927 2928 2929 2930 2931 2932 2933
		/* 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;

Jens Axboe's avatar
Jens Axboe committed
2934 2935 2936 2937 2938
	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;
2939 2940 2941 2942 2943 2944 2945

	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. */
Jens Axboe's avatar
Jens Axboe committed
2946 2947 2948 2949
			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;
2950 2951 2952 2953 2954 2955
		}

		else if (strcmp (drive->id->model, "V006E0DS") == 0 &&
		    drive->id->fw_rev[4] == '1' &&
		    drive->id->fw_rev[6] <= '2') {
			/* Vertos 600 ESD. */
Jens Axboe's avatar
Jens Axboe committed
2956
			CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1;
2957 2958
		}

Jens Axboe's avatar
Jens Axboe committed
2959
		else if (strcmp(drive->id->model,
2960
				 "NEC CD-ROM DRIVE:260") == 0 &&
Jens Axboe's avatar
Jens Axboe committed
2961
			 strncmp(drive->id->fw_rev, "1.01", 4) == 0) { /* FIXME */
2962 2963 2964
			/* Old NEC260 (not R).
			   This drive was released before the 1.2 version
			   of the spec. */
Jens Axboe's avatar
Jens Axboe committed
2965 2966 2967 2968
			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;
2969 2970
		}

Jens Axboe's avatar
Jens Axboe committed
2971 2972
		else if (strcmp(drive->id->model, "WEARNES CDD-120") == 0 &&
			 strncmp(drive->id->fw_rev, "A1.1", 4) == 0) { /* FIXME */
2973
			/* Wearnes */
Jens Axboe's avatar
Jens Axboe committed
2974 2975
			CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1;
			CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1;
2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001
		}

                /* 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);

	if (CDROM_CONFIG_FLAGS(drive)->dvd_ram)
3002
		set_device_ro(mk_kdev(drive->disk->major, drive->disk->first_minor), 0);
3003

Jens Axboe's avatar
Jens Axboe committed
3004 3005 3006 3007 3008 3009 3010 3011 3012 3013
#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)) {
3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027
		printk ("%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;
}

/* Forwarding functions to generic routines. */
static
int ide_cdrom_ioctl (ide_drive_t *drive,
		     struct inode *inode, struct file *file,
		     unsigned int cmd, unsigned long arg)
{
Alexander Viro's avatar
Alexander Viro committed
3028
	struct cdrom_info *info = drive->driver_data;
3029

Alexander Viro's avatar
Alexander Viro committed
3030
	return cdrom_ioctl(&info->devinfo, inode, cmd, arg);
3031 3032 3033 3034 3035 3036 3037 3038 3039
}

static
int ide_cdrom_open (struct inode *ip, struct file *fp, ide_drive_t *drive)
{
	struct cdrom_info *info = drive->driver_data;
	int rc = -ENOMEM;

	MOD_INC_USE_COUNT;
Alexander Viro's avatar
Alexander Viro committed
3040
	if (!info->buffer)
3041
		info->buffer = (char *) kmalloc(SECTOR_BUFFER_SIZE, GFP_KERNEL);
Alexander Viro's avatar
Alexander Viro committed
3042
        if (!info->buffer || (rc = cdrom_open(&info->devinfo, ip, fp))) {
3043 3044 3045 3046 3047 3048 3049 3050 3051 3052
		drive->usage--;
		MOD_DEC_USE_COUNT;
	}
	return rc;
}

static
void ide_cdrom_release (struct inode *inode, struct file *file,
			ide_drive_t *drive)
{
Alexander Viro's avatar
Alexander Viro committed
3053 3054
	struct cdrom_info *info = drive->driver_data;
	cdrom_release (&info->devinfo, file);
3055 3056 3057 3058 3059 3060
	MOD_DEC_USE_COUNT;
}

static
int ide_cdrom_check_media_change (ide_drive_t *drive)
{
Alexander Viro's avatar
Alexander Viro committed
3061 3062
	struct cdrom_info *info = drive->driver_data;
	return cdrom_media_changed(&info->devinfo);
3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087
}

static
void ide_cdrom_revalidate (ide_drive_t *drive)
{
	struct request_sense sense;
	cdrom_read_toc(drive, &sense);
}

static
unsigned long ide_cdrom_capacity (ide_drive_t *drive)
{
	unsigned long capacity;

	if (cdrom_read_capacity(drive, &capacity, NULL))
		return 0;

	return capacity * SECTORS_PER_FRAME;
}

static
int ide_cdrom_cleanup(ide_drive_t *drive)
{
	struct cdrom_info *info = drive->driver_data;
	struct cdrom_device_info *devinfo = &info->devinfo;
3088
	struct gendisk *g = drive->disk;
3089

Jens Axboe's avatar
Jens Axboe committed
3090 3091 3092
	if (ide_unregister_subdriver(drive)) {
		printk("%s: %s: failed to ide_unregister_subdriver\n",
			__FUNCTION__, drive->name);
3093
		return 1;
Jens Axboe's avatar
Jens Axboe committed
3094
	}
3095 3096 3097 3098 3099 3100
	if (info->buffer != NULL)
		kfree(info->buffer);
	if (info->toc != NULL)
		kfree(info->toc);
	if (info->changer_info != NULL)
		kfree(info->changer_info);
Jens Axboe's avatar
Jens Axboe committed
3101 3102
	if (devinfo->handle == drive && unregister_cdrom(devinfo))
		printk("%s: ide_cdrom_cleanup failed to unregister device from the cdrom driver.\n", drive->name);
3103 3104
	kfree(info);
	drive->driver_data = NULL;
3105
	del_gendisk(g);
3106 3107 3108
	return 0;
}

Jens Axboe's avatar
Jens Axboe committed
3109
static int ide_cdrom_attach (ide_drive_t *drive);
3110 3111

static ide_driver_t ide_cdrom_driver = {
3112 3113 3114 3115 3116
	.owner			= THIS_MODULE,
	.name			= "ide-cdrom",
	.version		= IDECD_VERSION,
	.media			= ide_cdrom,
	.busy			= 0,
3117
#ifdef CONFIG_IDEDMA_ONLYDISK
3118
	.supports_dma		= 0,
3119
#else
3120
	.supports_dma		= 1,
3121
#endif
3122 3123 3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144
	.supports_dsc_overlap	= 1,
	.cleanup		= ide_cdrom_cleanup,
	.standby		= NULL,
	.suspend		= NULL,
	.resume			= NULL,
	.flushcache		= NULL,
	.do_request		= ide_do_rw_cdrom,
	.end_request		= NULL,
	.sense			= ide_cdrom_dump_status,
	.error			= ide_cdrom_error,
	.ioctl			= ide_cdrom_ioctl,
	.open			= ide_cdrom_open,
	.release		= ide_cdrom_release,
	.media_change		= ide_cdrom_check_media_change,
	.revalidate		= ide_cdrom_revalidate,
	.pre_reset		= NULL,
	.capacity		= ide_cdrom_capacity,
	.special		= NULL,
	.proc			= NULL,
	.attach			= ide_cdrom_attach,
	.ata_prebuilder		= NULL,
	.atapi_prebuilder	= NULL,
	.drives			= LIST_HEAD_INIT(ide_cdrom_driver.drives),
3145 3146 3147 3148 3149 3150 3151 3152
};

/* options */
char *ignore = NULL;

MODULE_PARM(ignore, "s");
MODULE_DESCRIPTION("ATAPI CD-ROM Driver");

Jens Axboe's avatar
Jens Axboe committed
3153
static int ide_cdrom_attach (ide_drive_t *drive)
3154 3155
{
	struct cdrom_info *info;
3156
	struct gendisk *g = drive->disk;
3157
	struct request_sense sense;
3158

3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175
	if (!strstr("ide-cdrom", drive->driver_req))
		goto failed;
	if (!drive->present)
		goto failed;
	if (drive->media != ide_cdrom)
		goto failed;
	/* skip drives that we were told to ignore */
	if (ignore != NULL) {
		if (strstr(ignore, drive->name)) {
			printk("ide-cd: ignoring drive %s\n", drive->name);
			goto failed;
		}
	}
	if (drive->scsi) {
		printk("ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name);
		goto failed;
	}
3176 3177
	info = (struct cdrom_info *) kmalloc (sizeof (struct cdrom_info), GFP_KERNEL);
	if (info == NULL) {
Jens Axboe's avatar
Jens Axboe committed
3178
		printk("%s: Can't allocate a cdrom structure\n", drive->name);
3179
		goto failed;
3180
	}
Jens Axboe's avatar
Jens Axboe committed
3181 3182 3183 3184
	if (ide_register_subdriver(drive, &ide_cdrom_driver, IDE_SUBDRIVER_VERSION)) {
		printk("%s: Failed to register the driver with ide.c\n",
			drive->name);
		kfree(info);
3185
		goto failed;
3186
	}
Jens Axboe's avatar
Jens Axboe committed
3187
	memset(info, 0, sizeof (struct cdrom_info));
3188 3189
	drive->driver_data = info;
	DRIVER(drive)->busy++;
3190
	g->minors = 1;
3191 3192
	g->minor_shift = 0;
	g->de = drive->de;
3193
	g->driverfs_dev = &drive->gendev;
3194
	g->flags = GENHD_FL_CD;
Jens Axboe's avatar
Jens Axboe committed
3195
	if (ide_cdrom_setup(drive)) {
3196
		struct cdrom_device_info *devinfo = &info->devinfo;
3197
		DRIVER(drive)->busy--;
Jens Axboe's avatar
Jens Axboe committed
3198
		ide_unregister_subdriver(drive);
3199 3200 3201 3202 3203 3204
		if (info->buffer != NULL)
			kfree(info->buffer);
		if (info->toc != NULL)
			kfree(info->toc);
		if (info->changer_info != NULL)
			kfree(info->changer_info);
Jens Axboe's avatar
Jens Axboe committed
3205
		if (devinfo->handle == drive && unregister_cdrom(devinfo))
3206 3207 3208
			printk ("%s: ide_cdrom_cleanup failed to unregister device from the cdrom driver.\n", drive->name);
		kfree(info);
		drive->driver_data = NULL;
3209
		goto failed;
3210 3211
	}
	DRIVER(drive)->busy--;
3212 3213

	cdrom_read_toc(drive, &sense);
3214
	add_disk(g);
3215
	return 0;
3216 3217
failed:
	return 1;
3218 3219 3220 3221
}

static void __exit ide_cdrom_exit(void)
{
3222
	ide_unregister_driver(&ide_cdrom_driver);
3223 3224
}
 
3225
static int ide_cdrom_init(void)
3226
{
3227
	ide_register_driver(&ide_cdrom_driver);
3228 3229 3230 3231 3232 3233
	return 0;
}

module_init(ide_cdrom_init);
module_exit(ide_cdrom_exit);
MODULE_LICENSE("GPL");