diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/ide/ide-cd.c | |
| download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/ide/ide-cd.c')
| -rw-r--r-- | drivers/ide/ide-cd.c | 3524 |
1 files changed, 3524 insertions, 0 deletions
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c new file mode 100644 index 0000000..33a020f --- /dev/null +++ b/drivers/ide/ide-cd.c @@ -0,0 +1,3524 @@ +/* + * linux/drivers/ide/ide-cd.c + * + * Copyright (C) 1994, 1995, 1996 scott snyder <snyder@fnald0.fnal.gov> + * Copyright (C) 1996-1998 Erik Andersen <andersee@debian.org> + * Copyright (C) 1998-2000 Jens Axboe <axboe@suse.de> + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * ATAPI CD-ROM driver. To be used with ide.c. + * See Documentation/cdrom/ide-cd for usage information. + * + * Suggestions are welcome. Patches that work are more welcome though. ;-) + * For those wishing to work on this driver, please be sure you download + * and comply with the latest Mt. Fuji (SFF8090 version 4) and ATAPI + * (SFF-8020i rev 2.6) standards. These documents can be obtained by + * anonymous ftp from: + * ftp://fission.dt.wdc.com/pub/standards/SFF_atapi/spec/SFF8020-r2.6/PS/8020r26.ps + * ftp://ftp.avc-pioneer.com/Mtfuji4/Spec/Fuji4r10.pdf + * + * Drives that deviate from these standards will be accommodated as much + * as possible via compile time or command-line options. Since I only have + * a few drives, you generally need to send me patches... + * + * ---------------------------------- + * TO DO LIST: + * -Make it so that Pioneer CD DR-A24X and friends don't get screwed up on + * boot + * + * ---------------------------------- + * 1.00 Oct 31, 1994 -- Initial version. + * 1.01 Nov 2, 1994 -- Fixed problem with starting request in + * cdrom_check_status. + * 1.03 Nov 25, 1994 -- leaving unmask_intr[] as a user-setting (as for disks) + * (from mlord) -- minor changes to cdrom_setup() + * -- renamed ide_dev_s to ide_drive_t, enable irq on command + * 2.00 Nov 27, 1994 -- Generalize packet command interface; + * add audio ioctls. + * 2.01 Dec 3, 1994 -- Rework packet command interface to handle devices + * which send an interrupt when ready for a command. + * 2.02 Dec 11, 1994 -- Cache the TOC in the driver. + * Don't use SCMD_PLAYAUDIO_TI; it's not included + * in the current version of ATAPI. + * Try to use LBA instead of track or MSF addressing + * when possible. + * Don't wait for READY_STAT. + * 2.03 Jan 10, 1995 -- Rewrite block read routines to handle block sizes + * other than 2k and to move multiple sectors in a + * single transaction. + * 2.04 Apr 21, 1995 -- Add work-around for Creative Labs CD220E drives. + * Thanks to Nick Saw <cwsaw@pts7.pts.mot.com> for + * help in figuring this out. Ditto for Acer and + * Aztech drives, which seem to have the same problem. + * 2.04b May 30, 1995 -- Fix to match changes in ide.c version 3.16 -ml + * 2.05 Jun 8, 1995 -- Don't attempt to retry after an illegal request + * or data protect error. + * Use HWIF and DEV_HWIF macros as in ide.c. + * Always try to do a request_sense after + * a failed command. + * Include an option to give textual descriptions + * of ATAPI errors. + * Fix a bug in handling the sector cache which + * showed up if the drive returned data in 512 byte + * blocks (like Pioneer drives). Thanks to + * Richard Hirst <srh@gpt.co.uk> for diagnosing this. + * Properly supply the page number field in the + * MODE_SELECT command. + * PLAYAUDIO12 is broken on the Aztech; work around it. + * 2.05x Aug 11, 1995 -- lots of data structure renaming/restructuring in ide.c + * (my apologies to Scott, but now ide-cd.c is independent) + * 3.00 Aug 22, 1995 -- Implement CDROMMULTISESSION ioctl. + * Implement CDROMREADAUDIO ioctl (UNTESTED). + * Use input_ide_data() and output_ide_data(). + * Add door locking. + * Fix usage count leak in cdrom_open, which happened + * when a read-write mount was attempted. + * Try to load the disk on open. + * Implement CDROMEJECT_SW ioctl (off by default). + * Read total cdrom capacity during open. + * Rearrange logic in cdrom_decode_status. Issue + * request sense commands for failed packet commands + * from here instead of from cdrom_queue_packet_command. + * Fix a race condition in retrieving error information. + * Suppress printing normal unit attention errors and + * some drive not ready errors. + * Implement CDROMVOLREAD ioctl. + * Implement CDROMREADMODE1/2 ioctls. + * Fix race condition in setting up interrupt handlers + * when the `serialize' option is used. + * 3.01 Sep 2, 1995 -- Fix ordering of reenabling interrupts in + * cdrom_queue_request. + * Another try at using ide_[input,output]_data. + * 3.02 Sep 16, 1995 -- Stick total disk capacity in partition table as well. + * Make VERBOSE_IDE_CD_ERRORS dump failed command again. + * Dump out more information for ILLEGAL REQUEST errs. + * Fix handling of errors occurring before the + * packet command is transferred. + * Fix transfers with odd bytelengths. + * 3.03 Oct 27, 1995 -- Some Creative drives have an id of just `CD'. + * `DCI-2S10' drives are broken too. + * 3.04 Nov 20, 1995 -- So are Vertos drives. + * 3.05 Dec 1, 1995 -- Changes to go with overhaul of ide.c and ide-tape.c + * 3.06 Dec 16, 1995 -- Add support needed for partitions. + * More workarounds for Vertos bugs (based on patches + * from Holger Dietze <dietze@aix520.informatik.uni-leipzig.de>). + * Try to eliminate byteorder assumptions. + * Use atapi_cdrom_subchnl struct definition. + * Add STANDARD_ATAPI compilation option. + * 3.07 Jan 29, 1996 -- More twiddling for broken drives: Sony 55D, + * Vertos 300. + * Add NO_DOOR_LOCKING configuration option. + * Handle drive_cmd requests w/NULL args (for hdparm -t). + * Work around sporadic Sony55e audio play problem. + * 3.07a Feb 11, 1996 -- check drive->id for NULL before dereferencing, to fix + * problem with "hde=cdrom" with no drive present. -ml + * 3.08 Mar 6, 1996 -- More Vertos workarounds. + * 3.09 Apr 5, 1996 -- Add CDROMCLOSETRAY ioctl. + * Switch to using MSF addressing for audio commands. + * Reformat to match kernel tabbing style. + * Add CDROM_GET_UPC ioctl. + * 3.10 Apr 10, 1996 -- Fix compilation error with STANDARD_ATAPI. + * 3.11 Apr 29, 1996 -- Patch from Heiko Eissfeldt <heiko@colossus.escape.de> + * to remove redundant verify_area calls. + * 3.12 May 7, 1996 -- Rudimentary changer support. Based on patches + * from Gerhard Zuber <zuber@berlin.snafu.de>. + * Let open succeed even if there's no loaded disc. + * 3.13 May 19, 1996 -- Fixes for changer code. + * 3.14 May 29, 1996 -- Add work-around for Vertos 600. + * (From Hennus Bergman <hennus@sky.ow.nl>.) + * 3.15 July 2, 1996 -- Added support for Sanyo 3 CD changers + * from Ben Galliart <bgallia@luc.edu> with + * special help from Jeff Lightfoot + * <jeffml@pobox.com> + * 3.15a July 9, 1996 -- Improved Sanyo 3 CD changer identification + * 3.16 Jul 28, 1996 -- Fix from Gadi to reduce kernel stack usage for ioctl. + * 3.17 Sep 17, 1996 -- Tweak audio reads for some drives. + * Start changing CDROMLOADFROMSLOT to CDROM_SELECT_DISC. + * 3.18 Oct 31, 1996 -- Added module and DMA support. + * + * + * 4.00 Nov 5, 1996 -- New ide-cd maintainer, + * Erik B. Andersen <andersee@debian.org> + * -- Newer Creative drives don't always set the error + * register correctly. Make sure we see media changes + * regardless. + * -- Integrate with generic cdrom driver. + * -- CDROMGETSPINDOWN and CDROMSETSPINDOWN ioctls, based on + * a patch from Ciro Cattuto <>. + * -- Call set_device_ro. + * -- Implement CDROMMECHANISMSTATUS and CDROMSLOTTABLE + * ioctls, based on patch by Erik Andersen + * -- Add some probes of drive capability during setup. + * + * 4.01 Nov 11, 1996 -- Split into ide-cd.c and ide-cd.h + * -- Removed CDROMMECHANISMSTATUS and CDROMSLOTTABLE + * ioctls in favor of a generalized approach + * using the generic cdrom driver. + * -- Fully integrated with the 2.1.X kernel. + * -- Other stuff that I forgot (lots of changes) + * + * 4.02 Dec 01, 1996 -- Applied patch from Gadi Oxman <gadio@netvision.net.il> + * to fix the drive door locking problems. + * + * 4.03 Dec 04, 1996 -- Added DSC overlap support. + * 4.04 Dec 29, 1996 -- Added CDROMREADRAW ioclt based on patch + * by Ales Makarov (xmakarov@sun.felk.cvut.cz) + * + * 4.05 Nov 20, 1997 -- Modified to print more drive info on init + * Minor other changes + * Fix errors on CDROMSTOP (If you have a "Dolphin", + * you must define IHAVEADOLPHIN) + * Added identifier so new Sanyo CD-changer works + * Better detection if door locking isn't supported + * + * 4.06 Dec 17, 1997 -- fixed endless "tray open" messages -ml + * 4.07 Dec 17, 1997 -- fallback to set pc->stat on "tray open" + * 4.08 Dec 18, 1997 -- spew less noise when tray is empty + * -- fix speed display for ACER 24X, 18X + * 4.09 Jan 04, 1998 -- fix handling of the last block so we return + * an end of file instead of an I/O error (Gadi) + * 4.10 Jan 24, 1998 -- fixed a bug so now changers can change to a new + * slot when there is no disc in the current slot. + * -- Fixed a memory leak where info->changer_info was + * malloc'ed but never free'd when closing the device. + * -- Cleaned up the global namespace a bit by making more + * functions static that should already have been. + * 4.11 Mar 12, 1998 -- Added support for the CDROM_SELECT_SPEED ioctl + * based on a patch for 2.0.33 by Jelle Foks + * <jelle@scintilla.utwente.nl>, a patch for 2.0.33 + * by Toni Giorgino <toni@pcape2.pi.infn.it>, the SCSI + * version, and my own efforts. -erik + * -- Fixed a stupid bug which egcs was kind enough to + * inform me of where "Illegal mode for this track" + * was never returned due to a comparison on data + * types of limited range. + * 4.12 Mar 29, 1998 -- Fixed bug in CDROM_SELECT_SPEED so write speed is + * now set ionly for CD-R and CD-RW drives. I had + * removed this support because it produced errors. + * It produced errors _only_ for non-writers. duh. + * 4.13 May 05, 1998 -- Suppress useless "in progress of becoming ready" + * messages, since this is not an error. + * -- Change error messages to be const + * -- Remove a "\t" which looks ugly in the syslogs + * 4.14 July 17, 1998 -- Change to pointing to .ps version of ATAPI spec + * since the .pdf version doesn't seem to work... + * -- Updated the TODO list to something more current. + * + * 4.15 Aug 25, 1998 -- Updated ide-cd.h to respect mechine endianess, + * patch thanks to "Eddie C. Dost" <ecd@skynet.be> + * + * 4.50 Oct 19, 1998 -- New maintainers! + * Jens Axboe <axboe@image.dk> + * Chris Zwilling <chris@cloudnet.com> + * + * 4.51 Dec 23, 1998 -- Jens Axboe <axboe@image.dk> + * - ide_cdrom_reset enabled since the ide subsystem + * handles resets fine now. <axboe@image.dk> + * - Transfer size fix for Samsung CD-ROMs, thanks to + * "Ville Hallik" <ville.hallik@mail.ee>. + * - other minor stuff. + * + * 4.52 Jan 19, 1999 -- Jens Axboe <axboe@image.dk> + * - Detect DVD-ROM/RAM drives + * + * 4.53 Feb 22, 1999 - Include other model Samsung and one Goldstar + * drive in transfer size limit. + * - Fix the I/O error when doing eject without a medium + * loaded on some drives. + * - CDROMREADMODE2 is now implemented through + * CDROMREADRAW, since many drives don't support + * MODE2 (even though ATAPI 2.6 says they must). + * - Added ignore parameter to ide-cd (as a module), eg + * insmod ide-cd ignore='hda hdb' + * Useful when using ide-cd in conjunction with + * ide-scsi. TODO: non-modular way of doing the + * same. + * + * 4.54 Aug 5, 1999 - Support for MMC2 class commands through the generic + * packet interface to cdrom.c. + * - Unified audio ioctl support, most of it. + * - cleaned up various deprecated verify_area(). + * - Added ide_cdrom_packet() as the interface for + * the Uniform generic_packet(). + * - bunch of other stuff, will fill in logs later. + * - report 1 slot for non-changers, like the other + * cd-rom drivers. don't report select disc for + * non-changers as well. + * - mask out audio playing, if the device can't do it. + * + * 4.55 Sep 1, 1999 - Eliminated the rest of the audio ioctls, except + * for CDROMREADTOC[ENTRY|HEADER]. Some of the drivers + * use this independently of the actual audio handling. + * They will disappear later when I get the time to + * do it cleanly. + * - Minimize the TOC reading - only do it when we + * know a media change has occurred. + * - Moved all the CDROMREADx ioctls to the Uniform layer. + * - Heiko Eissfeldt <heiko@colossus.escape.de> supplied + * some fixes for CDI. + * - CD-ROM leaving door locked fix from Andries + * Brouwer <Andries.Brouwer@cwi.nl> + * - Erik Andersen <andersen@xmission.com> unified + * commands across the various drivers and how + * sense errors are handled. + * + * 4.56 Sep 12, 1999 - Removed changer support - it is now in the + * Uniform layer. + * - Added partition based multisession handling. + * - Mode sense and mode select moved to the + * Uniform layer. + * - Fixed a problem with WPI CDS-32X drive - it + * failed the capabilities + * + * 4.57 Apr 7, 2000 - Fixed sense reporting. + * - Fixed possible oops in ide_cdrom_get_last_session() + * - Fix locking mania and make ide_cdrom_reset relock + * - Stop spewing errors to log when magicdev polls with + * TEST_UNIT_READY on some drives. + * - Various fixes from Tobias Ringstrom: + * tray if it was locked prior to the reset. + * - cdrom_read_capacity returns one frame too little. + * - Fix real capacity reporting. + * + * 4.58 May 1, 2000 - Clean up ACER50 stuff. + * - Fix small problem with ide_cdrom_capacity + * + * 4.59 Aug 11, 2000 - Fix changer problem in cdrom_read_toc, we weren't + * correctly sensing a disc change. + * - Rearranged some code + * - Use extended sense on drives that support it for + * correctly reporting tray status -- from + * Michael D Johnson <johnsom@orst.edu> + * 4.60 Dec 17, 2003 - Add mt rainier support + * - Bump timeout for packet commands, matches sr + * - Odd stuff + * 4.61 Jan 22, 2004 - support hardware sector sizes other than 2kB, + * Pascal Schmidt <der.eremit@email.de> + * + *************************************************************************/ + +#define IDECD_VERSION "4.61" + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/errno.h> +#include <linux/cdrom.h> +#include <linux/ide.h> +#include <linux/completion.h> + +#include <scsi/scsi.h> /* For SCSI -> ATAPI command conversion */ + +#include <asm/irq.h> +#include <asm/io.h> +#include <asm/byteorder.h> +#include <asm/uaccess.h> +#include <asm/unaligned.h> + +#include "ide-cd.h" + +static DECLARE_MUTEX(idecd_ref_sem); + +#define to_ide_cd(obj) container_of(obj, struct cdrom_info, kref) + +#define ide_cd_g(disk) \ + container_of((disk)->private_data, struct cdrom_info, driver) + +static struct cdrom_info *ide_cd_get(struct gendisk *disk) +{ + struct cdrom_info *cd = NULL; + + down(&idecd_ref_sem); + cd = ide_cd_g(disk); + if (cd) + kref_get(&cd->kref); + up(&idecd_ref_sem); + return cd; +} + +static void ide_cd_release(struct kref *); + +static void ide_cd_put(struct cdrom_info *cd) +{ + down(&idecd_ref_sem); + kref_put(&cd->kref, ide_cd_release); + up(&idecd_ref_sem); +} + +/**************************************************************************** + * Generic packet command support and error handling routines. + */ + +/* Mark that we've seen a media change, and invalidate our internal + buffers. */ +static void cdrom_saw_media_change (ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + + CDROM_STATE_FLAGS (drive)->media_changed = 1; + CDROM_STATE_FLAGS (drive)->toc_valid = 0; + info->nsectors_buffered = 0; +} + +static int cdrom_log_sense(ide_drive_t *drive, struct request *rq, + struct request_sense *sense) +{ + int log = 0; + + if (!sense || !rq || (rq->flags & REQ_QUIET)) + return 0; + + switch (sense->sense_key) { + case NO_SENSE: case RECOVERED_ERROR: + break; + case NOT_READY: + /* + * don't care about tray state messages for + * e.g. capacity commands or in-progress or + * becoming ready + */ + if (sense->asc == 0x3a || sense->asc == 0x04) + break; + log = 1; + break; + case ILLEGAL_REQUEST: + /* + * don't log START_STOP unit with LoEj set, since + * we cannot reliably check if drive can auto-close + */ + if (rq->cmd[0] == GPCMD_START_STOP_UNIT && sense->asc == 0x24) + log = 0; + break; + case UNIT_ATTENTION: + /* + * Make good and sure we've seen this potential media + * change. Some drives (i.e. Creative) fail to present + * the correct sense key in the error register. + */ + cdrom_saw_media_change(drive); + break; + default: + log = 1; + break; + } + return log; +} + +static +void cdrom_analyze_sense_data(ide_drive_t *drive, + struct request *failed_command, + struct request_sense *sense) +{ + if (!cdrom_log_sense(drive, failed_command, sense)) + return; + + /* + * If a read toc is executed for a CD-R or CD-RW medium where + * the first toc has not been recorded yet, it will fail with + * 05/24/00 (which is a confusing error) + */ + if (failed_command && failed_command->cmd[0] == GPCMD_READ_TOC_PMA_ATIP) + if (sense->sense_key == 0x05 && sense->asc == 0x24) + return; + +#if VERBOSE_IDE_CD_ERRORS + { + int i; + const char *s; + char buf[80]; + + printk ("ATAPI device %s:\n", drive->name); + if (sense->error_code==0x70) + printk(" Error: "); + else if (sense->error_code==0x71) + printk(" Deferred Error: "); + else if (sense->error_code == 0x7f) + printk(" Vendor-specific Error: "); + else + printk(" Unknown Error Type: "); + + if (sense->sense_key < ARY_LEN(sense_key_texts)) + s = sense_key_texts[sense->sense_key]; + else + s = "bad sense key!"; + + printk("%s -- (Sense key=0x%02x)\n", s, sense->sense_key); + + if (sense->asc == 0x40) { + sprintf(buf, "Diagnostic failure on component 0x%02x", + sense->ascq); + s = buf; + } else { + int lo = 0, mid, hi = ARY_LEN(sense_data_texts); + unsigned long key = (sense->sense_key << 16); + key |= (sense->asc << 8); + if (!(sense->ascq >= 0x80 && sense->ascq <= 0xdd)) + key |= sense->ascq; + s = NULL; + + while (hi > lo) { + mid = (lo + hi) / 2; + if (sense_data_texts[mid].asc_ascq == key || + sense_data_texts[mid].asc_ascq == (0xff0000|key)) { + s = sense_data_texts[mid].text; + break; + } + else if (sense_data_texts[mid].asc_ascq > key) + hi = mid; + else + lo = mid+1; + } + } + + if (s == NULL) { + if (sense->asc > 0x80) + s = "(vendor-specific error)"; + else + s = "(reserved error code)"; + } + + printk(KERN_ERR " %s -- (asc=0x%02x, ascq=0x%02x)\n", + s, sense->asc, sense->ascq); + + if (failed_command != NULL) { + + int lo=0, mid, hi= ARY_LEN (packet_command_texts); + s = NULL; + + while (hi > lo) { + mid = (lo + hi) / 2; + if (packet_command_texts[mid].packet_command == + failed_command->cmd[0]) { + s = packet_command_texts[mid].text; + break; + } + if (packet_command_texts[mid].packet_command > + failed_command->cmd[0]) + hi = mid; + else + lo = mid+1; + } + + printk (KERN_ERR " The failed \"%s\" packet command was: \n \"", s); + for (i=0; i<sizeof (failed_command->cmd); i++) + printk ("%02x ", failed_command->cmd[i]); + printk ("\"\n"); + } + + /* The SKSV bit specifies validity of the sense_key_specific + * in the next two commands. It is bit 7 of the first byte. + * In the case of NOT_READY, if SKSV is set the drive can + * give us nice ETA readings. + */ + if (sense->sense_key == NOT_READY && (sense->sks[0] & 0x80)) { + int progress = (sense->sks[1] << 8 | sense->sks[2]) * 100; + printk(KERN_ERR " Command is %02d%% complete\n", progress / 0xffff); + + } + + if (sense->sense_key == ILLEGAL_REQUEST && + (sense->sks[0] & 0x80) != 0) { + printk(KERN_ERR " Error in %s byte %d", + (sense->sks[0] & 0x40) != 0 ? + "command packet" : "command data", + (sense->sks[1] << 8) + sense->sks[2]); + + if ((sense->sks[0] & 0x40) != 0) + printk (" bit %d", sense->sks[0] & 0x07); + + printk ("\n"); + } + } + +#else /* not VERBOSE_IDE_CD_ERRORS */ + + /* Suppress printing unit attention and `in progress of becoming ready' + errors when we're not being verbose. */ + + if (sense->sense_key == UNIT_ATTENTION || + (sense->sense_key == NOT_READY && (sense->asc == 4 || + sense->asc == 0x3a))) + return; + + printk(KERN_ERR "%s: error code: 0x%02x sense_key: 0x%02x asc: 0x%02x ascq: 0x%02x\n", + drive->name, + sense->error_code, sense->sense_key, + sense->asc, sense->ascq); +#endif /* not VERBOSE_IDE_CD_ERRORS */ +} + +/* + * Initialize a ide-cd packet command request + */ +static void cdrom_prepare_request(ide_drive_t *drive, struct request *rq) +{ + struct cdrom_info *cd = drive->driver_data; + + ide_init_drive_cmd(rq); + rq->flags = REQ_PC; + rq->rq_disk = cd->disk; +} + +static void cdrom_queue_request_sense(ide_drive_t *drive, void *sense, + struct request *failed_command) +{ + struct cdrom_info *info = drive->driver_data; + struct request *rq = &info->request_sense_request; + + if (sense == NULL) + sense = &info->sense_data; + + /* stuff the sense request in front of our current request */ + cdrom_prepare_request(drive, rq); + + rq->data = sense; + rq->cmd[0] = GPCMD_REQUEST_SENSE; + rq->cmd[4] = rq->data_len = 18; + + rq->flags = REQ_SENSE; + + /* NOTE! Save the failed command in "rq->buffer" */ + rq->buffer = (void *) failed_command; + + (void) ide_do_drive_cmd(drive, rq, ide_preempt); +} + +static void cdrom_end_request (ide_drive_t *drive, int uptodate) +{ + struct request *rq = HWGROUP(drive)->rq; + int nsectors = rq->hard_cur_sectors; + + if ((rq->flags & REQ_SENSE) && uptodate) { + /* + * For REQ_SENSE, "rq->buffer" points to the original failed + * request + */ + struct request *failed = (struct request *) rq->buffer; + struct cdrom_info *info = drive->driver_data; + void *sense = &info->sense_data; + unsigned long flags; + + if (failed) { + if (failed->sense) { + sense = failed->sense; + failed->sense_len = rq->sense_len; + } + + /* + * now end failed request + */ + spin_lock_irqsave(&ide_lock, flags); + end_that_request_chunk(failed, 0, failed->data_len); + end_that_request_last(failed); + spin_unlock_irqrestore(&ide_lock, flags); + } + + cdrom_analyze_sense_data(drive, failed, sense); + } + + if (!rq->current_nr_sectors && blk_fs_request(rq)) + uptodate = 1; + /* make sure it's fully ended */ + if (blk_pc_request(rq)) + nsectors = (rq->data_len + 511) >> 9; + if (!nsectors) + nsectors = 1; + + ide_end_request(drive, uptodate, nsectors); +} + +/* Returns 0 if the request should be continued. + Returns 1 if the request was ended. */ +static int cdrom_decode_status(ide_drive_t *drive, int good_stat, int *stat_ret) +{ + struct request *rq = HWGROUP(drive)->rq; + int stat, err, sense_key; + + /* Check for errors. */ + stat = HWIF(drive)->INB(IDE_STATUS_REG); + if (stat_ret) + *stat_ret = stat; + + if (OK_STAT(stat, good_stat, BAD_R_STAT)) + return 0; + + /* Get the IDE error register. */ + err = HWIF(drive)->INB(IDE_ERROR_REG); + sense_key = err >> 4; + + if (rq == NULL) { + printk("%s: missing rq in cdrom_decode_status\n", drive->name); + return 1; + } + + if (rq->flags & REQ_SENSE) { + /* We got an error trying to get sense info + from the drive (probably while trying + to recover from a former error). Just give up. */ + + rq->flags |= REQ_FAILED; + cdrom_end_request(drive, 0); + ide_error(drive, "request sense failure", stat); + return 1; + + } else if (rq->flags & (REQ_PC | REQ_BLOCK_PC)) { + /* All other functions, except for READ. */ + unsigned long flags; + + /* + * if we have an error, pass back CHECK_CONDITION as the + * scsi status byte + */ + if ((rq->flags & REQ_BLOCK_PC) && !rq->errors) + rq->errors = SAM_STAT_CHECK_CONDITION; + + /* Check for tray open. */ + if (sense_key == NOT_READY) { + cdrom_saw_media_change (drive); + } else if (sense_key == UNIT_ATTENTION) { + /* Check for media change. */ + cdrom_saw_media_change (drive); + /*printk("%s: media changed\n",drive->name);*/ + return 0; + } else if (!(rq->flags & REQ_QUIET)) { + /* Otherwise, print an error. */ + ide_dump_status(drive, "packet command error", stat); + } + + rq->flags |= REQ_FAILED; + + /* + * instead of playing games with moving completions around, + * remove failed request completely and end it when the + * request sense has completed + */ + if (stat & ERR_STAT) { + spin_lock_irqsave(&ide_lock, flags); + blkdev_dequeue_request(rq); + HWGROUP(drive)->rq = NULL; + spin_unlock_irqrestore(&ide_lock, flags); + + cdrom_queue_request_sense(drive, rq->sense, rq); + } else + cdrom_end_request(drive, 0); + + } else if (blk_fs_request(rq)) { + int do_end_request = 0; + + /* Handle errors from READ and WRITE requests. */ + + if (blk_noretry_request(rq)) + do_end_request = 1; + + if (sense_key == NOT_READY) { + /* Tray open. */ + if (rq_data_dir(rq) == READ) { + cdrom_saw_media_change (drive); + + /* Fail the request. */ + printk ("%s: tray open\n", drive->name); + do_end_request = 1; + } else { + struct cdrom_info *info = drive->driver_data; + + /* allow the drive 5 seconds to recover, some + * devices will return this error while flushing + * data from cache */ + if (!rq->errors) + info->write_timeout = jiffies + ATAPI_WAIT_WRITE_BUSY; + rq->errors = 1; + if (time_after(jiffies, info->write_timeout)) + do_end_request = 1; + else { + unsigned long flags; + + /* + * take a breather relying on the + * unplug timer to kick us again + */ + spin_lock_irqsave(&ide_lock, flags); + blk_plug_device(drive->queue); + spin_unlock_irqrestore(&ide_lock,flags); + return 1; + } + } + } else if (sense_key == UNIT_ATTENTION) { + /* Media change. */ + cdrom_saw_media_change (drive); + + /* Arrange to retry the request. + But be sure to give up if we've retried + too many times. */ + if (++rq->errors > ERROR_MAX) + do_end_request = 1; + } else if (sense_key == ILLEGAL_REQUEST || + sense_key == DATA_PROTECT) { + /* No point in retrying after an illegal + request or data protect error.*/ + ide_dump_status (drive, "command error", stat); + do_end_request = 1; + } else if (sense_key == MEDIUM_ERROR) { + /* No point in re-trying a zillion times on a bad + * sector... If we got here the error is not correctable */ + ide_dump_status (drive, "media error (bad sector)", stat); + do_end_request = 1; + } else if (sense_key == BLANK_CHECK) { + /* Disk appears blank ?? */ + ide_dump_status (drive, "media error (blank)", stat); + do_end_request = 1; + } else if ((err & ~ABRT_ERR) != 0) { + /* Go to the default handler + for other errors. */ + ide_error(drive, "cdrom_decode_status", stat); + return 1; + } else if ((++rq->errors > ERROR_MAX)) { + /* We've racked up too many retries. Abort. */ + do_end_request = 1; + } + + if (do_end_request) + cdrom_end_request(drive, 0); + + /* If we got a CHECK_CONDITION status, + queue a request sense command. */ + if ((stat & ERR_STAT) != 0) + cdrom_queue_request_sense(drive, NULL, NULL); + } else { + blk_dump_rq_flags(rq, "ide-cd: bad rq"); + cdrom_end_request(drive, 0); + } + + /* Retry, or handle the next request. */ + return 1; +} + +static int cdrom_timer_expiry(ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + unsigned long wait = 0; + + /* + * Some commands are *slow* and normally take a long time to + * complete. Usually we can use the ATAPI "disconnect" to bypass + * this, but not all commands/drives support that. Let + * ide_timer_expiry keep polling us for these. + */ + switch (rq->cmd[0]) { + case GPCMD_BLANK: + case GPCMD_FORMAT_UNIT: + case GPCMD_RESERVE_RZONE_TRACK: + case GPCMD_CLOSE_TRACK: + case GPCMD_FLUSH_CACHE: + wait = ATAPI_WAIT_PC; + break; + default: + if (!(rq->flags & REQ_QUIET)) + printk(KERN_INFO "ide-cd: cmd 0x%x timed out\n", rq->cmd[0]); + wait = 0; + break; + } + return wait; +} + +/* Set up the device registers for transferring a packet command on DEV, + expecting to later transfer XFERLEN bytes. HANDLER is the routine + which actually transfers the command to the drive. If this is a + drq_interrupt device, this routine will arrange for HANDLER to be + called when the interrupt from the drive arrives. Otherwise, HANDLER + will be called immediately after the drive is prepared for the transfer. */ + +static ide_startstop_t cdrom_start_packet_command(ide_drive_t *drive, + int xferlen, + ide_handler_t *handler) +{ + ide_startstop_t startstop; + struct cdrom_info *info = drive->driver_data; + ide_hwif_t *hwif = drive->hwif; + + /* Wait for the controller to be idle. */ + if (ide_wait_stat(&startstop, drive, 0, BUSY_STAT, WAIT_READY)) + return startstop; + + if (info->dma) + info->dma = !hwif->dma_setup(drive); + + /* Set up the controller registers. */ + /* FIXME: for Virtual DMA we must check harder */ + HWIF(drive)->OUTB(info->dma, IDE_FEATURE_REG); + HWIF(drive)->OUTB(0, IDE_IREASON_REG); + HWIF(drive)->OUTB(0, IDE_SECTOR_REG); + + HWIF(drive)->OUTB(xferlen & 0xff, IDE_BCOUNTL_REG); + HWIF(drive)->OUTB(xferlen >> 8 , IDE_BCOUNTH_REG); + if (IDE_CONTROL_REG) + HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); + + if (CDROM_CONFIG_FLAGS (drive)->drq_interrupt) { + /* packet command */ + ide_execute_command(drive, WIN_PACKETCMD, handler, ATAPI_WAIT_PC, cdrom_timer_expiry); + return ide_started; + } else { + unsigned long flags; + + /* packet command */ + spin_lock_irqsave(&ide_lock, flags); + hwif->OUTBSYNC(drive, WIN_PACKETCMD, IDE_COMMAND_REG); + ndelay(400); + spin_unlock_irqrestore(&ide_lock, flags); + + return (*handler) (drive); + } +} + +/* Send a packet command to DRIVE described by CMD_BUF and CMD_LEN. + The device registers must have already been prepared + by cdrom_start_packet_command. + HANDLER is the interrupt handler to call when the command completes + or there's data ready. */ +/* + * changed 5 parameters to 3 for dvd-ram + * struct packet_command *pc; now packet_command_t *pc; + */ +#define ATAPI_MIN_CDB_BYTES 12 +static ide_startstop_t cdrom_transfer_packet_command (ide_drive_t *drive, + struct request *rq, + ide_handler_t *handler) +{ + ide_hwif_t *hwif = drive->hwif; + int cmd_len; + struct cdrom_info *info = drive->driver_data; + ide_startstop_t startstop; + + if (CDROM_CONFIG_FLAGS(drive)->drq_interrupt) { + /* Here we should have been called after receiving an interrupt + from the device. DRQ should how be set. */ + + /* Check for errors. */ + if (cdrom_decode_status(drive, DRQ_STAT, NULL)) + return ide_stopped; + } else { + /* Otherwise, we must wait for DRQ to get set. */ + if (ide_wait_stat(&startstop, drive, DRQ_STAT, + BUSY_STAT, WAIT_READY)) + return startstop; + } + + /* Arm the interrupt handler. */ + ide_set_handler(drive, handler, rq->timeout, cdrom_timer_expiry); + + /* ATAPI commands get padded out to 12 bytes minimum */ + cmd_len = COMMAND_SIZE(rq->cmd[0]); + if (cmd_len < ATAPI_MIN_CDB_BYTES) + cmd_len = ATAPI_MIN_CDB_BYTES; + + /* Send the command to the device. */ + HWIF(drive)->atapi_output_bytes(drive, rq->cmd, cmd_len); + + /* Start the DMA if need be */ + if (info->dma) + hwif->dma_start(drive); + + return ide_started; +} + +/**************************************************************************** + * Block read functions. + */ + +/* + * Buffer up to SECTORS_TO_TRANSFER sectors from the drive in our sector + * buffer. Once the first sector is added, any subsequent sectors are + * assumed to be continuous (until the buffer is cleared). For the first + * sector added, SECTOR is its sector number. (SECTOR is then ignored until + * the buffer is cleared.) + */ +static void cdrom_buffer_sectors (ide_drive_t *drive, unsigned long sector, + int sectors_to_transfer) +{ + struct cdrom_info *info = drive->driver_data; + + /* Number of sectors to read into the buffer. */ + int sectors_to_buffer = min_t(int, sectors_to_transfer, + (SECTOR_BUFFER_SIZE >> SECTOR_BITS) - + info->nsectors_buffered); + + char *dest; + + /* If we couldn't get a buffer, don't try to buffer anything... */ + if (info->buffer == NULL) + sectors_to_buffer = 0; + + /* If this is the first sector in the buffer, remember its number. */ + if (info->nsectors_buffered == 0) + info->sector_buffered = sector; + + /* Read the data into the buffer. */ + dest = info->buffer + info->nsectors_buffered * SECTOR_SIZE; + while (sectors_to_buffer > 0) { + HWIF(drive)->atapi_input_bytes(drive, dest, SECTOR_SIZE); + --sectors_to_buffer; + --sectors_to_transfer; + ++info->nsectors_buffered; + dest += SECTOR_SIZE; + } + + /* Throw away any remaining data. */ + while (sectors_to_transfer > 0) { + static char dum[SECTOR_SIZE]; + HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum)); + --sectors_to_transfer; + } +} + +/* + * Check the contents of the interrupt reason register from the cdrom + * and attempt to recover if there are problems. Returns 0 if everything's + * ok; nonzero if the request has been terminated. + */ +static inline +int cdrom_read_check_ireason (ide_drive_t *drive, int len, int ireason) +{ + if (ireason == 2) + return 0; + else if (ireason == 0) { + /* Whoops... The drive is expecting to receive data from us! */ + printk(KERN_ERR "%s: read_intr: Drive wants to transfer data the " + "wrong way!\n", drive->name); + + /* Throw some data at the drive so it doesn't hang + and quit this request. */ + while (len > 0) { + int dum = 0; + HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof (dum)); + len -= sizeof (dum); + } + } else if (ireason == 1) { + /* Some drives (ASUS) seem to tell us that status + * info is available. just get it and ignore. + */ + (void) HWIF(drive)->INB(IDE_STATUS_REG); + return 0; + } else { + /* Drive wants a command packet, or invalid ireason... */ + printk(KERN_ERR "%s: read_intr: bad interrupt reason %x\n", drive->name, + ireason); + } + + cdrom_end_request(drive, 0); + return -1; +} + +/* + * Interrupt routine. Called when a read request has completed. + */ +static ide_startstop_t cdrom_read_intr (ide_drive_t *drive) +{ + int stat; + int ireason, len, sectors_to_transfer, nskip; + struct cdrom_info *info = drive->driver_data; + u8 lowcyl = 0, highcyl = 0; + int dma = info->dma, dma_error = 0; + + struct request *rq = HWGROUP(drive)->rq; + + /* + * handle dma case + */ + if (dma) { + info->dma = 0; + if ((dma_error = HWIF(drive)->ide_dma_end(drive))) + __ide_dma_off(drive); + } + + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + + if (dma) { + if (!dma_error) { + ide_end_request(drive, 1, rq->nr_sectors); + return ide_stopped; + } else + return ide_error(drive, "dma error", stat); + } + + /* Read the interrupt reason and the transfer length. */ + ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3; + lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); + highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); + + len = lowcyl + (256 * highcyl); + + /* If DRQ is clear, the command has completed. */ + if ((stat & DRQ_STAT) == 0) { + /* If we're not done filling the current buffer, complain. + Otherwise, complete the command normally. */ + if (rq->current_nr_sectors > 0) { + printk (KERN_ERR "%s: cdrom_read_intr: data underrun (%d blocks)\n", + drive->name, rq->current_nr_sectors); + rq->flags |= REQ_FAILED; + cdrom_end_request(drive, 0); + } else + cdrom_end_request(drive, 1); + return ide_stopped; + } + + /* Check that the drive is expecting to do the same thing we are. */ + if (cdrom_read_check_ireason (drive, len, ireason)) + return ide_stopped; + + /* Assume that the drive will always provide data in multiples + of at least SECTOR_SIZE, as it gets hairy to keep track + of the transfers otherwise. */ + if ((len % SECTOR_SIZE) != 0) { + printk (KERN_ERR "%s: cdrom_read_intr: Bad transfer size %d\n", + drive->name, len); + if (CDROM_CONFIG_FLAGS(drive)->limit_nframes) + printk (KERN_ERR " This drive is not supported by this version of the driver\n"); + else { + printk (KERN_ERR " Trying to limit transfer sizes\n"); + CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1; + } + cdrom_end_request(drive, 0); + return ide_stopped; + } + + /* The number of sectors we need to read from the drive. */ + sectors_to_transfer = len / SECTOR_SIZE; + + /* First, figure out if we need to bit-bucket + any of the leading sectors. */ + nskip = min_t(int, rq->current_nr_sectors - bio_cur_sectors(rq->bio), sectors_to_transfer); + + while (nskip > 0) { + /* We need to throw away a sector. */ + static char dum[SECTOR_SIZE]; + HWIF(drive)->atapi_input_bytes(drive, dum, sizeof (dum)); + + --rq->current_nr_sectors; + --nskip; + --sectors_to_transfer; + } + + /* Now loop while we still have data to read from the drive. */ + while (sectors_to_transfer > 0) { + int this_transfer; + + /* If we've filled the present buffer but there's another + chained buffer after it, move on. */ + if (rq->current_nr_sectors == 0 && rq->nr_sectors) + cdrom_end_request(drive, 1); + + /* If the buffers are full, cache the rest of the data in our + internal buffer. */ + if (rq->current_nr_sectors == 0) { + cdrom_buffer_sectors(drive, rq->sector, sectors_to_transfer); + sectors_to_transfer = 0; + } else { + /* Transfer data to the buffers. + Figure out how many sectors we can transfer + to the current buffer. */ + this_transfer = min_t(int, sectors_to_transfer, + rq->current_nr_sectors); + + /* Read this_transfer sectors + into the current buffer. */ + while (this_transfer > 0) { + HWIF(drive)->atapi_input_bytes(drive, rq->buffer, SECTOR_SIZE); + rq->buffer += SECTOR_SIZE; + --rq->nr_sectors; + --rq->current_nr_sectors; + ++rq->sector; + --this_transfer; + --sectors_to_transfer; + } + } + } + + /* Done moving data! Wait for another interrupt. */ + ide_set_handler(drive, &cdrom_read_intr, ATAPI_WAIT_PC, NULL); + return ide_started; +} + +/* + * Try to satisfy some of the current read request from our cached data. + * Returns nonzero if the request has been completed, zero otherwise. + */ +static int cdrom_read_from_buffer (ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + struct request *rq = HWGROUP(drive)->rq; + unsigned short sectors_per_frame; + + sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; + + /* Can't do anything if there's no buffer. */ + if (info->buffer == NULL) return 0; + + /* Loop while this request needs data and the next block is present + in our cache. */ + while (rq->nr_sectors > 0 && + rq->sector >= info->sector_buffered && + rq->sector < info->sector_buffered + info->nsectors_buffered) { + if (rq->current_nr_sectors == 0) + cdrom_end_request(drive, 1); + + memcpy (rq->buffer, + info->buffer + + (rq->sector - info->sector_buffered) * SECTOR_SIZE, + SECTOR_SIZE); + rq->buffer += SECTOR_SIZE; + --rq->current_nr_sectors; + --rq->nr_sectors; + ++rq->sector; + } + + /* If we've satisfied the current request, + terminate it successfully. */ + if (rq->nr_sectors == 0) { + cdrom_end_request(drive, 1); + return -1; + } + + /* Move on to the next buffer if needed. */ + if (rq->current_nr_sectors == 0) + cdrom_end_request(drive, 1); + + /* If this condition does not hold, then the kluge i use to + represent the number of sectors to skip at the start of a transfer + will fail. I think that this will never happen, but let's be + paranoid and check. */ + if (rq->current_nr_sectors < bio_cur_sectors(rq->bio) && + (rq->sector & (sectors_per_frame - 1))) { + printk(KERN_ERR "%s: cdrom_read_from_buffer: buffer botch (%ld)\n", + drive->name, (long)rq->sector); + cdrom_end_request(drive, 0); + return -1; + } + + return 0; +} + +/* + * Routine to send a read packet command to the drive. + * This is usually called directly from cdrom_start_read. + * However, for drq_interrupt devices, it is called from an interrupt + * when the drive is ready to accept the command. + */ +static ide_startstop_t cdrom_start_read_continuation (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + unsigned short sectors_per_frame; + int nskip; + + sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; + + /* If the requested sector doesn't start on a cdrom block boundary, + we must adjust the start of the transfer so that it does, + and remember to skip the first few sectors. + If the CURRENT_NR_SECTORS field is larger than the size + of the buffer, it will mean that we're to skip a number + of sectors equal to the amount by which CURRENT_NR_SECTORS + is larger than the buffer size. */ + nskip = rq->sector & (sectors_per_frame - 1); + if (nskip > 0) { + /* Sanity check... */ + if (rq->current_nr_sectors != bio_cur_sectors(rq->bio) && + (rq->sector & (sectors_per_frame - 1))) { + printk(KERN_ERR "%s: cdrom_start_read_continuation: buffer botch (%u)\n", + drive->name, rq->current_nr_sectors); + cdrom_end_request(drive, 0); + return ide_stopped; + } + rq->current_nr_sectors += nskip; + } + + /* Set up the command */ + rq->timeout = ATAPI_WAIT_PC; + + /* Send the command to the drive and return. */ + return cdrom_transfer_packet_command(drive, rq, &cdrom_read_intr); +} + + +#define IDECD_SEEK_THRESHOLD (1000) /* 1000 blocks */ +#define IDECD_SEEK_TIMER (5 * WAIT_MIN_SLEEP) /* 100 ms */ +#define IDECD_SEEK_TIMEOUT (2 * WAIT_CMD) /* 20 sec */ + +static ide_startstop_t cdrom_seek_intr (ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + int stat; + static int retry = 10; + + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + CDROM_CONFIG_FLAGS(drive)->seeking = 1; + + if (retry && time_after(jiffies, info->start_seek + IDECD_SEEK_TIMER)) { + if (--retry == 0) { + /* + * this condition is far too common, to bother + * users about it + */ + /* printk("%s: disabled DSC seek overlap\n", drive->name);*/ + drive->dsc_overlap = 0; + } + } + return ide_stopped; +} + +static ide_startstop_t cdrom_start_seek_continuation (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + sector_t frame = rq->sector; + + sector_div(frame, queue_hardsect_size(drive->queue) >> SECTOR_BITS); + + memset(rq->cmd, 0, sizeof(rq->cmd)); + rq->cmd[0] = GPCMD_SEEK; + put_unaligned(cpu_to_be32(frame), (unsigned int *) &rq->cmd[2]); + + rq->timeout = ATAPI_WAIT_PC; + return cdrom_transfer_packet_command(drive, rq, &cdrom_seek_intr); +} + +static ide_startstop_t cdrom_start_seek (ide_drive_t *drive, unsigned int block) +{ + struct cdrom_info *info = drive->driver_data; + + info->dma = 0; + info->cmd = 0; + info->start_seek = jiffies; + return cdrom_start_packet_command(drive, 0, cdrom_start_seek_continuation); +} + +/* Fix up a possibly partially-processed request so that we can + start it over entirely, or even put it back on the request queue. */ +static void restore_request (struct request *rq) +{ + if (rq->buffer != bio_data(rq->bio)) { + sector_t n = (rq->buffer - (char *) bio_data(rq->bio)) / SECTOR_SIZE; + + rq->buffer = bio_data(rq->bio); + rq->nr_sectors += n; + rq->sector -= n; + } + rq->hard_cur_sectors = rq->current_nr_sectors = bio_cur_sectors(rq->bio); + rq->hard_nr_sectors = rq->nr_sectors; + rq->hard_sector = rq->sector; + rq->q->prep_rq_fn(rq->q, rq); +} + +/* + * Start a read request from the CD-ROM. + */ +static ide_startstop_t cdrom_start_read (ide_drive_t *drive, unsigned int block) +{ + struct cdrom_info *info = drive->driver_data; + struct request *rq = HWGROUP(drive)->rq; + unsigned short sectors_per_frame; + + sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; + + /* We may be retrying this request after an error. Fix up + any weirdness which might be present in the request packet. */ + restore_request(rq); + + /* Satisfy whatever we can of this request from our cached sector. */ + if (cdrom_read_from_buffer(drive)) + return ide_stopped; + + blk_attempt_remerge(drive->queue, rq); + + /* Clear the local sector buffer. */ + info->nsectors_buffered = 0; + + /* use dma, if possible. */ + info->dma = drive->using_dma; + if ((rq->sector & (sectors_per_frame - 1)) || + (rq->nr_sectors & (sectors_per_frame - 1))) + info->dma = 0; + + info->cmd = READ; + + /* Start sending the read request to the drive. */ + return cdrom_start_packet_command(drive, 32768, cdrom_start_read_continuation); +} + +/**************************************************************************** + * Execute all other packet commands. + */ + +/* Interrupt routine for packet command completion. */ +static ide_startstop_t cdrom_pc_intr (ide_drive_t *drive) +{ + int ireason, len, thislen; + struct request *rq = HWGROUP(drive)->rq; + u8 lowcyl = 0, highcyl = 0; + int stat; + + /* Check for errors. */ + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + + /* Read the interrupt reason and the transfer length. */ + ireason = HWIF(drive)->INB(IDE_IREASON_REG); + lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); + highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); + + len = lowcyl + (256 * highcyl); + + /* If DRQ is clear, the command has completed. + Complain if we still have data left to transfer. */ + if ((stat & DRQ_STAT) == 0) { + /* Some of the trailing request sense fields are optional, and + some drives don't send them. Sigh. */ + if (rq->cmd[0] == GPCMD_REQUEST_SENSE && + rq->data_len > 0 && + rq->data_len <= 5) { + while (rq->data_len > 0) { + *(unsigned char *)rq->data++ = 0; + --rq->data_len; + } + } + + if (rq->data_len == 0) + cdrom_end_request(drive, 1); + else { + /* Comment this out, because this always happens + right after a reset occurs, and it is annoying to + always print expected stuff. */ + /* + printk ("%s: cdrom_pc_intr: data underrun %d\n", + drive->name, pc->buflen); + */ + rq->flags |= REQ_FAILED; + cdrom_end_request(drive, 0); + } + return ide_stopped; + } + + /* Figure out how much data to transfer. */ + thislen = rq->data_len; + if (thislen > len) thislen = len; + + /* The drive wants to be written to. */ + if ((ireason & 3) == 0) { + if (!rq->data) { + blk_dump_rq_flags(rq, "cdrom_pc_intr, write"); + goto confused; + } + /* Transfer the data. */ + HWIF(drive)->atapi_output_bytes(drive, rq->data, thislen); + + /* If we haven't moved enough data to satisfy the drive, + add some padding. */ + while (len > thislen) { + int dum = 0; + HWIF(drive)->atapi_output_bytes(drive, &dum, sizeof(dum)); + len -= sizeof(dum); + } + + /* Keep count of how much data we've moved. */ + rq->data += thislen; + rq->data_len -= thislen; + } + + /* Same drill for reading. */ + else if ((ireason & 3) == 2) { + if (!rq->data) { + blk_dump_rq_flags(rq, "cdrom_pc_intr, write"); + goto confused; + } + /* Transfer the data. */ + HWIF(drive)->atapi_input_bytes(drive, rq->data, thislen); + + /* If we haven't moved enough data to satisfy the drive, + add some padding. */ + while (len > thislen) { + int dum = 0; + HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum)); + len -= sizeof(dum); + } + + /* Keep count of how much data we've moved. */ + rq->data += thislen; + rq->data_len -= thislen; + + if (rq->flags & REQ_SENSE) + rq->sense_len += thislen; + } else { +confused: + printk (KERN_ERR "%s: cdrom_pc_intr: The drive " + "appears confused (ireason = 0x%02x)\n", + drive->name, ireason); + rq->flags |= REQ_FAILED; + } + + /* Now we wait for another interrupt. */ + ide_set_handler(drive, &cdrom_pc_intr, ATAPI_WAIT_PC, cdrom_timer_expiry); + return ide_started; +} + +static ide_startstop_t cdrom_do_pc_continuation (ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + + if (!rq->timeout) + rq->timeout = ATAPI_WAIT_PC; + + /* Send the command to the drive and return. */ + return cdrom_transfer_packet_command(drive, rq, &cdrom_pc_intr); +} + + +static ide_startstop_t cdrom_do_packet_command (ide_drive_t *drive) +{ + int len; + struct request *rq = HWGROUP(drive)->rq; + struct cdrom_info *info = drive->driver_data; + + info->dma = 0; + info->cmd = 0; + rq->flags &= ~REQ_FAILED; + len = rq->data_len; + + /* Start sending the command to the drive. */ + return cdrom_start_packet_command(drive, len, cdrom_do_pc_continuation); +} + + +static +int cdrom_queue_packet_command(ide_drive_t *drive, struct request *rq) +{ + struct request_sense sense; + int retries = 10; + unsigned int flags = rq->flags; + + if (rq->sense == NULL) + rq->sense = &sense; + + /* Start of retry loop. */ + do { + int error; + unsigned long time = jiffies; + rq->flags = flags; + + error = ide_do_drive_cmd(drive, rq, ide_wait); + time = jiffies - time; + + /* FIXME: we should probably abort/retry or something + * in case of failure */ + if (rq->flags & REQ_FAILED) { + /* The request failed. Retry if it was due to a unit + attention status + (usually means media was changed). */ + struct request_sense *reqbuf = rq->sense; + + if (reqbuf->sense_key == UNIT_ATTENTION) + cdrom_saw_media_change(drive); + else if (reqbuf->sense_key == NOT_READY && + reqbuf->asc == 4 && reqbuf->ascq != 4) { + /* The drive is in the process of loading + a disk. Retry, but wait a little to give + the drive time to complete the load. */ + ssleep(2); + } else { + /* Otherwise, don't retry. */ + retries = 0; + } + --retries; + } + + /* End of retry loop. */ + } while ((rq->flags & REQ_FAILED) && retries >= 0); + + /* Return an error if the command failed. */ + return (rq->flags & REQ_FAILED) ? -EIO : 0; +} + +/* + * Write handling + */ +static inline int cdrom_write_check_ireason(ide_drive_t *drive, int len, int ireason) +{ + /* Two notes about IDE interrupt reason here - 0 means that + * the drive wants to receive data from us, 2 means that + * the drive is expecting to transfer data to us. + */ + if (ireason == 0) + return 0; + else if (ireason == 2) { + /* Whoops... The drive wants to send data. */ + printk(KERN_ERR "%s: write_intr: wrong transfer direction!\n", + drive->name); + + while (len > 0) { + int dum = 0; + HWIF(drive)->atapi_input_bytes(drive, &dum, sizeof(dum)); + len -= sizeof(dum); + } + } else { + /* Drive wants a command packet, or invalid ireason... */ + printk(KERN_ERR "%s: write_intr: bad interrupt reason %x\n", + drive->name, ireason); + } + + cdrom_end_request(drive, 0); + return 1; +} + +static void post_transform_command(struct request *req) +{ + u8 *c = req->cmd; + char *ibuf; + + if (!blk_pc_request(req)) + return; + + if (req->bio) + ibuf = bio_data(req->bio); + else + ibuf = req->data; + + if (!ibuf) + return; + + /* + * set ansi-revision and response data as atapi + */ + if (c[0] == GPCMD_INQUIRY) { + ibuf[2] |= 2; + ibuf[3] = (ibuf[3] & 0xf0) | 2; + } +} + +typedef void (xfer_func_t)(ide_drive_t *, void *, u32); + +/* + * best way to deal with dma that is not sector aligned right now... note + * that in this path we are not using ->data or ->buffer at all. this irs + * can replace cdrom_pc_intr, cdrom_read_intr, and cdrom_write_intr in the + * future. + */ +static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + struct request *rq = HWGROUP(drive)->rq; + int dma_error, dma, stat, ireason, len, thislen; + u8 lowcyl, highcyl; + xfer_func_t *xferfunc; + unsigned long flags; + + /* Check for errors. */ + dma_error = 0; + dma = info->dma; + if (dma) { + info->dma = 0; + dma_error = HWIF(drive)->ide_dma_end(drive); + } + + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + + /* + * using dma, transfer is complete now + */ + if (dma) { + if (dma_error) { + printk(KERN_ERR "ide-cd: dma error\n"); + __ide_dma_off(drive); + return ide_error(drive, "dma error", stat); + } + + end_that_request_chunk(rq, 1, rq->data_len); + rq->data_len = 0; + goto end_request; + } + + /* + * ok we fall to pio :/ + */ + ireason = HWIF(drive)->INB(IDE_IREASON_REG) & 0x3; + lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); + highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); + + len = lowcyl + (256 * highcyl); + thislen = rq->data_len; + if (thislen > len) + thislen = len; + + /* + * If DRQ is clear, the command has completed. + */ + if ((stat & DRQ_STAT) == 0) + goto end_request; + + /* + * check which way to transfer data + */ + if (rq_data_dir(rq) == WRITE) { + /* + * write to drive + */ + if (cdrom_write_check_ireason(drive, len, ireason)) + return ide_stopped; + + xferfunc = HWIF(drive)->atapi_output_bytes; + } else { + /* + * read from drive + */ + if (cdrom_read_check_ireason(drive, len, ireason)) + return ide_stopped; + + xferfunc = HWIF(drive)->atapi_input_bytes; + } + + /* + * transfer data + */ + while (thislen > 0) { + int blen = blen = rq->data_len; + char *ptr = rq->data; + + /* + * bio backed? + */ + if (rq->bio) { + ptr = bio_data(rq->bio); + blen = bio_iovec(rq->bio)->bv_len; + } + + if (!ptr) { + printk(KERN_ERR "%s: confused, missing data\n", drive->name); + break; + } + + if (blen > thislen) + blen = thislen; + + xferfunc(drive, ptr, blen); + + thislen -= blen; + len -= blen; + rq->data_len -= blen; + + if (rq->bio) + end_that_request_chunk(rq, 1, blen); + else + rq->data += blen; + } + + /* + * pad, if necessary + */ + if (len > 0) { + while (len > 0) { + int pad = 0; + + xferfunc(drive, &pad, sizeof(pad)); + len -= sizeof(pad); + } + } + + if (HWGROUP(drive)->handler != NULL) + BUG(); + + ide_set_handler(drive, cdrom_newpc_intr, rq->timeout, NULL); + return ide_started; + +end_request: + if (!rq->data_len) + post_transform_command(rq); + + spin_lock_irqsave(&ide_lock, flags); + blkdev_dequeue_request(rq); + end_that_request_last(rq); + HWGROUP(drive)->rq = NULL; + spin_unlock_irqrestore(&ide_lock, flags); + return ide_stopped; +} + +static ide_startstop_t cdrom_write_intr(ide_drive_t *drive) +{ + int stat, ireason, len, sectors_to_transfer, uptodate; + struct cdrom_info *info = drive->driver_data; + int dma_error = 0, dma = info->dma; + u8 lowcyl = 0, highcyl = 0; + + struct request *rq = HWGROUP(drive)->rq; + + /* Check for errors. */ + if (dma) { + info->dma = 0; + if ((dma_error = HWIF(drive)->ide_dma_end(drive))) { + printk(KERN_ERR "ide-cd: write dma error\n"); + __ide_dma_off(drive); + } + } + + if (cdrom_decode_status(drive, 0, &stat)) + return ide_stopped; + + /* + * using dma, transfer is complete now + */ + if (dma) { + if (dma_error) + return ide_error(drive, "dma error", stat); + + ide_end_request(drive, 1, rq->nr_sectors); + return ide_stopped; + } + + /* Read the interrupt reason and the transfer length. */ + ireason = HWIF(drive)->INB(IDE_IREASON_REG); + lowcyl = HWIF(drive)->INB(IDE_BCOUNTL_REG); + highcyl = HWIF(drive)->INB(IDE_BCOUNTH_REG); + + len = lowcyl + (256 * highcyl); + + /* If DRQ is clear, the command has completed. */ + if ((stat & DRQ_STAT) == 0) { + /* If we're not done writing, complain. + * Otherwise, complete the command normally. + */ + uptodate = 1; + if (rq->current_nr_sectors > 0) { + printk(KERN_ERR "%s: write_intr: data underrun (%d blocks)\n", + drive->name, rq->current_nr_sectors); + uptodate = 0; + } + cdrom_end_request(drive, uptodate); + return ide_stopped; + } + + /* Check that the drive is expecting to do the same thing we are. */ + if (cdrom_write_check_ireason(drive, len, ireason)) + return ide_stopped; + + sectors_to_transfer = len / SECTOR_SIZE; + + /* + * now loop and write out the data + */ + while (sectors_to_transfer > 0) { + int this_transfer; + + if (!rq->current_nr_sectors) { + printk(KERN_ERR "ide-cd: write_intr: oops\n"); + break; + } + + /* + * Figure out how many sectors we can transfer + */ + this_transfer = min_t(int, sectors_to_transfer, rq->current_nr_sectors); + + while (this_transfer > 0) { + HWIF(drive)->atapi_output_bytes(drive, rq->buffer, SECTOR_SIZE); + rq->buffer += SECTOR_SIZE; + --rq->nr_sectors; + --rq->current_nr_sectors; + ++rq->sector; + --this_transfer; + --sectors_to_transfer; + } + + /* + * current buffer complete, move on + */ + if (rq->current_nr_sectors == 0 && rq->nr_sectors) + cdrom_end_request(drive, 1); + } + + /* re-arm handler */ + ide_set_handler(drive, &cdrom_write_intr, ATAPI_WAIT_PC, NULL); + return ide_started; +} + +static ide_startstop_t cdrom_start_write_cont(ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + +#if 0 /* the immediate bit */ + rq->cmd[1] = 1 << 3; +#endif + rq->timeout = ATAPI_WAIT_PC; + + return cdrom_transfer_packet_command(drive, rq, cdrom_write_intr); +} + +static ide_startstop_t cdrom_start_write(ide_drive_t *drive, struct request *rq) +{ + struct cdrom_info *info = drive->driver_data; + struct gendisk *g = info->disk; + unsigned short sectors_per_frame = queue_hardsect_size(drive->queue) >> SECTOR_BITS; + + /* + * writes *must* be hardware frame aligned + */ + if ((rq->nr_sectors & (sectors_per_frame - 1)) || + (rq->sector & (sectors_per_frame - 1))) { + cdrom_end_request(drive, 0); + return ide_stopped; + } + + /* + * disk has become write protected + */ + if (g->policy) { + cdrom_end_request(drive, 0); + return ide_stopped; + } + + /* + * for dvd-ram and such media, it's a really big deal to get + * big writes all the time. so scour the queue and attempt to + * remerge requests, often the plugging will not have had time + * to do this properly + */ + blk_attempt_remerge(drive->queue, rq); + + info->nsectors_buffered = 0; + + /* use dma, if possible. we don't need to check more, since we + * know that the transfer is always (at least!) frame aligned */ + info->dma = drive->using_dma ? 1 : 0; + info->cmd = WRITE; + + info->devinfo.media_written = 1; + + /* Start sending the write request to the drive. */ + return cdrom_start_packet_command(drive, 32768, cdrom_start_write_cont); +} + +static ide_startstop_t cdrom_do_newpc_cont(ide_drive_t *drive) +{ + struct request *rq = HWGROUP(drive)->rq; + + if (!rq->timeout) + rq->timeout = ATAPI_WAIT_PC; + + return cdrom_transfer_packet_command(drive, rq, cdrom_newpc_intr); +} + +static ide_startstop_t cdrom_do_block_pc(ide_drive_t *drive, struct request *rq) +{ + struct cdrom_info *info = drive->driver_data; + + rq->flags |= REQ_QUIET; + + info->dma = 0; + info->cmd = 0; + + /* + * sg request + */ + if (rq->bio) { + int mask = drive->queue->dma_alignment; + unsigned long addr = (unsigned long) page_address(bio_page(rq->bio)); + + info->cmd = rq_data_dir(rq); + info->dma = drive->using_dma; + + /* + * check if dma is safe + */ + if ((rq->data_len & mask) || (addr & mask)) + info->dma = 0; + } + + /* Start sending the command to the drive. */ + return cdrom_start_packet_command(drive, rq->data_len, cdrom_do_newpc_cont); +} + +/**************************************************************************** + * cdrom driver request routine. + */ +static ide_startstop_t +ide_do_rw_cdrom (ide_drive_t *drive, struct request *rq, sector_t block) +{ + ide_startstop_t action; + struct cdrom_info *info = drive->driver_data; + + if (blk_fs_request(rq)) { + if (CDROM_CONFIG_FLAGS(drive)->seeking) { + unsigned long elapsed = jiffies - info->start_seek; + int stat = HWIF(drive)->INB(IDE_STATUS_REG); + + if ((stat & SEEK_STAT) != SEEK_STAT) { + if (elapsed < IDECD_SEEK_TIMEOUT) { + ide_stall_queue(drive, IDECD_SEEK_TIMER); + return ide_stopped; + } + printk (KERN_ERR "%s: DSC timeout\n", drive->name); + } + CDROM_CONFIG_FLAGS(drive)->seeking = 0; + } + if ((rq_data_dir(rq) == READ) && IDE_LARGE_SEEK(info->last_block, block, IDECD_SEEK_THRESHOLD) && drive->dsc_overlap) { + action = cdrom_start_seek(drive, block); + } else { + if (rq_data_dir(rq) == READ) + action = cdrom_start_read(drive, block); + else + action = cdrom_start_write(drive, rq); + } + info->last_block = block; + return action; + } else if (rq->flags & (REQ_PC | REQ_SENSE)) { + return cdrom_do_packet_command(drive); + } else if (rq->flags & REQ_BLOCK_PC) { + return cdrom_do_block_pc(drive, rq); + } else if (rq->flags & REQ_SPECIAL) { + /* + * right now this can only be a reset... + */ + cdrom_end_request(drive, 1); + return ide_stopped; + } + + blk_dump_rq_flags(rq, "ide-cd bad flags"); + cdrom_end_request(drive, 0); + return ide_stopped; +} + + + +/**************************************************************************** + * Ioctl handling. + * + * Routines which queue packet commands take as a final argument a pointer + * to a request_sense struct. If execution of the command results + * in an error with a CHECK CONDITION status, this structure will be filled + * with the results of the subsequent request sense command. The pointer + * can also be NULL, in which case no sense information is returned. + */ + +#if ! STANDARD_ATAPI +static inline +int bin2bcd (int x) +{ + return (x%10) | ((x/10) << 4); +} + + +static inline +int bcd2bin (int x) +{ + return (x >> 4) * 10 + (x & 0x0f); +} + +static +void msf_from_bcd (struct atapi_msf *msf) +{ + msf->minute = bcd2bin (msf->minute); + msf->second = bcd2bin (msf->second); + msf->frame = bcd2bin (msf->frame); +} + +#endif /* not STANDARD_ATAPI */ + + +static inline +void lba_to_msf (int lba, byte *m, byte *s, byte *f) +{ + lba += CD_MSF_OFFSET; + lba &= 0xffffff; /* negative lbas use only 24 bits */ + *m = lba / (CD_SECS * CD_FRAMES); + lba %= (CD_SECS * CD_FRAMES); + *s = lba / CD_FRAMES; + *f = lba % CD_FRAMES; +} + + +static inline +int msf_to_lba (byte m, byte s, byte f) +{ + return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; +} + +static int cdrom_check_status(ide_drive_t *drive, struct request_sense *sense) +{ + struct request req; + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *cdi = &info->devinfo; + + cdrom_prepare_request(drive, &req); + + req.sense = sense; + req.cmd[0] = GPCMD_TEST_UNIT_READY; + req.flags |= REQ_QUIET; + +#if ! STANDARD_ATAPI + /* the Sanyo 3 CD changer uses byte 7 of TEST_UNIT_READY to + switch CDs instead of supporting the LOAD_UNLOAD opcode */ + + req.cmd[7] = cdi->sanyo_slot % 3; +#endif /* not STANDARD_ATAPI */ + + return cdrom_queue_packet_command(drive, &req); +} + + +/* Lock the door if LOCKFLAG is nonzero; unlock it otherwise. */ +static int +cdrom_lockdoor(ide_drive_t *drive, int lockflag, struct request_sense *sense) +{ + struct request_sense my_sense; + struct request req; + int stat; + + if (sense == NULL) + sense = &my_sense; + + /* If the drive cannot lock the door, just pretend. */ + if (CDROM_CONFIG_FLAGS(drive)->no_doorlock) { + stat = 0; + } else { + cdrom_prepare_request(drive, &req); + req.sense = sense; + req.cmd[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; + req.cmd[4] = lockflag ? 1 : 0; + stat = cdrom_queue_packet_command(drive, &req); + } + + /* If we got an illegal field error, the drive + probably cannot lock the door. */ + if (stat != 0 && + sense->sense_key == ILLEGAL_REQUEST && + (sense->asc == 0x24 || sense->asc == 0x20)) { + printk (KERN_ERR "%s: door locking not supported\n", + drive->name); + CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1; + stat = 0; + } + + /* no medium, that's alright. */ + if (stat != 0 && sense->sense_key == NOT_READY && sense->asc == 0x3a) + stat = 0; + + if (stat == 0) + CDROM_STATE_FLAGS(drive)->door_locked = lockflag; + + return stat; +} + + +/* Eject the disk if EJECTFLAG is 0. + If EJECTFLAG is 1, try to reload the disk. */ +static int cdrom_eject(ide_drive_t *drive, int ejectflag, + struct request_sense *sense) +{ + struct request req; + char loej = 0x02; + + if (CDROM_CONFIG_FLAGS(drive)->no_eject && !ejectflag) + return -EDRIVE_CANT_DO_THIS; + + /* reload fails on some drives, if the tray is locked */ + if (CDROM_STATE_FLAGS(drive)->door_locked && ejectflag) + return 0; + + cdrom_prepare_request(drive, &req); + + /* only tell drive to close tray if open, if it can do that */ + if (ejectflag && !CDROM_CONFIG_FLAGS(drive)->close_tray) + loej = 0; + + req.sense = sense; + req.cmd[0] = GPCMD_START_STOP_UNIT; + req.cmd[4] = loej | (ejectflag != 0); + return cdrom_queue_packet_command(drive, &req); +} + +static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity, + unsigned long *sectors_per_frame, + struct request_sense *sense) +{ + struct { + __u32 lba; + __u32 blocklen; + } capbuf; + + int stat; + struct request req; + + cdrom_prepare_request(drive, &req); + + req.sense = sense; + req.cmd[0] = GPCMD_READ_CDVD_CAPACITY; + req.data = (char *)&capbuf; + req.data_len = sizeof(capbuf); + + stat = cdrom_queue_packet_command(drive, &req); + if (stat == 0) { + *capacity = 1 + be32_to_cpu(capbuf.lba); + *sectors_per_frame = + be32_to_cpu(capbuf.blocklen) >> SECTOR_BITS; + } + + return stat; +} + +static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag, + int format, char *buf, int buflen, + struct request_sense *sense) +{ + struct request req; + + cdrom_prepare_request(drive, &req); + + req.sense = sense; + req.data = buf; + req.data_len = buflen; + req.flags |= REQ_QUIET; + req.cmd[0] = GPCMD_READ_TOC_PMA_ATIP; + req.cmd[6] = trackno; + req.cmd[7] = (buflen >> 8); + req.cmd[8] = (buflen & 0xff); + req.cmd[9] = (format << 6); + + if (msf_flag) + req.cmd[1] = 2; + + return cdrom_queue_packet_command(drive, &req); +} + + +/* Try to read the entire TOC for the disk into our internal buffer. */ +static int cdrom_read_toc(ide_drive_t *drive, struct request_sense *sense) +{ + int stat, ntracks, i; + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *cdi = &info->devinfo; + struct atapi_toc *toc = info->toc; + struct { + struct atapi_toc_header hdr; + struct atapi_toc_entry ent; + } ms_tmp; + long last_written; + unsigned long sectors_per_frame = SECTORS_PER_FRAME; + + if (toc == NULL) { + /* Try to allocate space. */ + toc = (struct atapi_toc *) kmalloc (sizeof (struct atapi_toc), + GFP_KERNEL); + info->toc = toc; + if (toc == NULL) { + printk (KERN_ERR "%s: No cdrom TOC buffer!\n", drive->name); + return -ENOMEM; + } + } + + /* Check to see if the existing data is still valid. + If it is, just return. */ + (void) cdrom_check_status(drive, sense); + + if (CDROM_STATE_FLAGS(drive)->toc_valid) + return 0; + + /* Try to get the total cdrom capacity and sector size. */ + stat = cdrom_read_capacity(drive, &toc->capacity, §ors_per_frame, + sense); + if (stat) + toc->capacity = 0x1fffff; + + set_capacity(info->disk, toc->capacity * sectors_per_frame); + blk_queue_hardsect_size(drive->queue, + sectors_per_frame << SECTOR_BITS); + + /* First read just the header, so we know how long the TOC is. */ + stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr, + sizeof(struct atapi_toc_header), sense); + if (stat) return stat; + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) { + toc->hdr.first_track = bcd2bin(toc->hdr.first_track); + toc->hdr.last_track = bcd2bin(toc->hdr.last_track); + } +#endif /* not STANDARD_ATAPI */ + + ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; + if (ntracks <= 0) + return -EIO; + if (ntracks > MAX_TRACKS) + ntracks = MAX_TRACKS; + + /* Now read the whole schmeer. */ + stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0, + (char *)&toc->hdr, + sizeof(struct atapi_toc_header) + + (ntracks + 1) * + sizeof(struct atapi_toc_entry), sense); + + if (stat && toc->hdr.first_track > 1) { + /* Cds with CDI tracks only don't have any TOC entries, + despite of this the returned values are + first_track == last_track = number of CDI tracks + 1, + so that this case is indistinguishable from the same + layout plus an additional audio track. + If we get an error for the regular case, we assume + a CDI without additional audio tracks. In this case + the readable TOC is empty (CDI tracks are not included) + and only holds the Leadout entry. Heiko Eißfeldt */ + ntracks = 0; + stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0, + (char *)&toc->hdr, + sizeof(struct atapi_toc_header) + + (ntracks + 1) * + sizeof(struct atapi_toc_entry), + sense); + if (stat) { + return stat; + } +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) { + toc->hdr.first_track = bin2bcd(CDROM_LEADOUT); + toc->hdr.last_track = bin2bcd(CDROM_LEADOUT); + } else +#endif /* not STANDARD_ATAPI */ + { + toc->hdr.first_track = CDROM_LEADOUT; + toc->hdr.last_track = CDROM_LEADOUT; + } + } + + if (stat) + return stat; + + toc->hdr.toc_length = ntohs (toc->hdr.toc_length); + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) { + toc->hdr.first_track = bcd2bin(toc->hdr.first_track); + toc->hdr.last_track = bcd2bin(toc->hdr.last_track); + } +#endif /* not STANDARD_ATAPI */ + + for (i=0; i<=ntracks; i++) { +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) { + if (CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd) + toc->ent[i].track = bcd2bin(toc->ent[i].track); + msf_from_bcd(&toc->ent[i].addr.msf); + } +#endif /* not STANDARD_ATAPI */ + toc->ent[i].addr.lba = msf_to_lba (toc->ent[i].addr.msf.minute, + toc->ent[i].addr.msf.second, + toc->ent[i].addr.msf.frame); + } + + /* Read the multisession information. */ + if (toc->hdr.first_track != CDROM_LEADOUT) { + /* Read the multisession information. */ + stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp, + sizeof(ms_tmp), sense); + if (stat) return stat; + + toc->last_session_lba = be32_to_cpu(ms_tmp.ent.addr.lba); + } else { + ms_tmp.hdr.first_track = ms_tmp.hdr.last_track = CDROM_LEADOUT; + toc->last_session_lba = msf_to_lba(0, 2, 0); /* 0m 2s 0f */ + } + +#if ! STANDARD_ATAPI + if (CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd) { + /* Re-read multisession information using MSF format */ + stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp, + sizeof(ms_tmp), sense); + if (stat) + return stat; + + msf_from_bcd (&ms_tmp.ent.addr.msf); + toc->last_session_lba = msf_to_lba(ms_tmp.ent.addr.msf.minute, + ms_tmp.ent.addr.msf.second, + ms_tmp.ent.addr.msf.frame); + } +#endif /* not STANDARD_ATAPI */ + + toc->xa_flag = (ms_tmp.hdr.first_track != ms_tmp.hdr.last_track); + + /* Now try to get the total cdrom capacity. */ + stat = cdrom_get_last_written(cdi, &last_written); + if (!stat && (last_written > toc->capacity)) { + toc->capacity = last_written; + set_capacity(info->disk, toc->capacity * sectors_per_frame); + } + + /* Remember that we've read this stuff. */ + CDROM_STATE_FLAGS(drive)->toc_valid = 1; + + return 0; +} + + +static int cdrom_read_subchannel(ide_drive_t *drive, int format, char *buf, + int buflen, struct request_sense *sense) +{ + struct request req; + + cdrom_prepare_request(drive, &req); + + req.sense = sense; + req.data = buf; + req.data_len = buflen; + req.cmd[0] = GPCMD_READ_SUBCHANNEL; + req.cmd[1] = 2; /* MSF addressing */ + req.cmd[2] = 0x40; /* request subQ data */ + req.cmd[3] = format; + req.cmd[7] = (buflen >> 8); + req.cmd[8] = (buflen & 0xff); + return cdrom_queue_packet_command(drive, &req); +} + +/* ATAPI cdrom drives are free to select the speed you request or any slower + rate :-( Requesting too fast a speed will _not_ produce an error. */ +static int cdrom_select_speed(ide_drive_t *drive, int speed, + struct request_sense *sense) +{ + struct request req; + cdrom_prepare_request(drive, &req); + + req.sense = sense; + if (speed == 0) + speed = 0xffff; /* set to max */ + else + speed *= 177; /* Nx to kbytes/s */ + + req.cmd[0] = GPCMD_SET_SPEED; + /* Read Drive speed in kbytes/second MSB */ + req.cmd[2] = (speed >> 8) & 0xff; + /* Read Drive speed in kbytes/second LSB */ + req.cmd[3] = speed & 0xff; + if (CDROM_CONFIG_FLAGS(drive)->cd_r || + CDROM_CONFIG_FLAGS(drive)->cd_rw || + CDROM_CONFIG_FLAGS(drive)->dvd_r) { + /* Write Drive speed in kbytes/second MSB */ + req.cmd[4] = (speed >> 8) & 0xff; + /* Write Drive speed in kbytes/second LSB */ + req.cmd[5] = speed & 0xff; + } + + return cdrom_queue_packet_command(drive, &req); +} + +static int cdrom_play_audio(ide_drive_t *drive, int lba_start, int lba_end) +{ + struct request_sense sense; + struct request req; + + cdrom_prepare_request(drive, &req); + + req.sense = &sense; + req.cmd[0] = GPCMD_PLAY_AUDIO_MSF; + lba_to_msf(lba_start, &req.cmd[3], &req.cmd[4], &req.cmd[5]); + lba_to_msf(lba_end-1, &req.cmd[6], &req.cmd[7], &req.cmd[8]); + + return cdrom_queue_packet_command(drive, &req); +} + +static int cdrom_get_toc_entry(ide_drive_t *drive, int track, + struct atapi_toc_entry **ent) +{ + struct cdrom_info *info = drive->driver_data; + struct atapi_toc *toc = info->toc; + int ntracks; + + /* + * don't serve cached data, if the toc isn't valid + */ + if (!CDROM_STATE_FLAGS(drive)->toc_valid) + return -EINVAL; + + /* Check validity of requested track number. */ + ntracks = toc->hdr.last_track - toc->hdr.first_track + 1; + if (toc->hdr.first_track == CDROM_LEADOUT) ntracks = 0; + if (track == CDROM_LEADOUT) + *ent = &toc->ent[ntracks]; + else if (track < toc->hdr.first_track || + track > toc->hdr.last_track) + return -EINVAL; + else + *ent = &toc->ent[track - toc->hdr.first_track]; + + return 0; +} + +/* the generic packet interface to cdrom.c */ +static int ide_cdrom_packet(struct cdrom_device_info *cdi, + struct packet_command *cgc) +{ + struct request req; + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + + if (cgc->timeout <= 0) + cgc->timeout = ATAPI_WAIT_PC; + + /* here we queue the commands from the uniform CD-ROM + layer. the packet must be complete, as we do not + touch it at all. */ + cdrom_prepare_request(drive, &req); + memcpy(req.cmd, cgc->cmd, CDROM_PACKET_SIZE); + if (cgc->sense) + memset(cgc->sense, 0, sizeof(struct request_sense)); + req.data = cgc->buffer; + req.data_len = cgc->buflen; + req.timeout = cgc->timeout; + + if (cgc->quiet) + req.flags |= REQ_QUIET; + + req.sense = cgc->sense; + cgc->stat = cdrom_queue_packet_command(drive, &req); + if (!cgc->stat) + cgc->buflen -= req.data_len; + return cgc->stat; +} + +static +int ide_cdrom_dev_ioctl (struct cdrom_device_info *cdi, + unsigned int cmd, unsigned long arg) +{ + struct packet_command cgc; + char buffer[16]; + int stat; + + init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_UNKNOWN); + + /* These will be moved into the Uniform layer shortly... */ + switch (cmd) { + case CDROMSETSPINDOWN: { + char spindown; + + if (copy_from_user(&spindown, (void __user *) arg, sizeof(char))) + return -EFAULT; + + if ((stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0))) + return stat; + + buffer[11] = (buffer[11] & 0xf0) | (spindown & 0x0f); + + return cdrom_mode_select(cdi, &cgc); + } + + case CDROMGETSPINDOWN: { + char spindown; + + if ((stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CDROM_PAGE, 0))) + return stat; + + spindown = buffer[11] & 0x0f; + + if (copy_to_user((void __user *) arg, &spindown, sizeof (char))) + return -EFAULT; + + return 0; + } + + default: + return -EINVAL; + } + +} + +static +int ide_cdrom_audio_ioctl (struct cdrom_device_info *cdi, + unsigned int cmd, void *arg) + +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct cdrom_info *info = drive->driver_data; + int stat; + + switch (cmd) { + /* + * emulate PLAY_AUDIO_TI command with PLAY_AUDIO_10, since + * atapi doesn't support it + */ + case CDROMPLAYTRKIND: { + unsigned long lba_start, lba_end; + struct cdrom_ti *ti = (struct cdrom_ti *)arg; + struct atapi_toc_entry *first_toc, *last_toc; + + stat = cdrom_get_toc_entry(drive, ti->cdti_trk0, &first_toc); + if (stat) + return stat; + + stat = cdrom_get_toc_entry(drive, ti->cdti_trk1, &last_toc); + if (stat) + return stat; + + if (ti->cdti_trk1 != CDROM_LEADOUT) + ++last_toc; + lba_start = first_toc->addr.lba; + lba_end = last_toc->addr.lba; + + if (lba_end <= lba_start) + return -EINVAL; + + return cdrom_play_audio(drive, lba_start, lba_end); + } + + case CDROMREADTOCHDR: { + struct cdrom_tochdr *tochdr = (struct cdrom_tochdr *) arg; + struct atapi_toc *toc; + + /* Make sure our saved TOC is valid. */ + stat = cdrom_read_toc(drive, NULL); + if (stat) return stat; + + toc = info->toc; + tochdr->cdth_trk0 = toc->hdr.first_track; + tochdr->cdth_trk1 = toc->hdr.last_track; + + return 0; + } + + case CDROMREADTOCENTRY: { + struct cdrom_tocentry *tocentry = (struct cdrom_tocentry*) arg; + struct atapi_toc_entry *toce; + + stat = cdrom_get_toc_entry(drive, tocentry->cdte_track, &toce); + if (stat) return stat; + + tocentry->cdte_ctrl = toce->control; + tocentry->cdte_adr = toce->adr; + if (tocentry->cdte_format == CDROM_MSF) { + lba_to_msf (toce->addr.lba, + &tocentry->cdte_addr.msf.minute, + &tocentry->cdte_addr.msf.second, + &tocentry->cdte_addr.msf.frame); + } else + tocentry->cdte_addr.lba = toce->addr.lba; + + return 0; + } + + default: + return -EINVAL; + } +} + +static +int ide_cdrom_reset (struct cdrom_device_info *cdi) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct request_sense sense; + struct request req; + int ret; + + cdrom_prepare_request(drive, &req); + req.flags = REQ_SPECIAL | REQ_QUIET; + ret = ide_do_drive_cmd(drive, &req, ide_wait); + + /* + * A reset will unlock the door. If it was previously locked, + * lock it again. + */ + if (CDROM_STATE_FLAGS(drive)->door_locked) + (void) cdrom_lockdoor(drive, 1, &sense); + + return ret; +} + + +static +int ide_cdrom_tray_move (struct cdrom_device_info *cdi, int position) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct request_sense sense; + + if (position) { + int stat = cdrom_lockdoor(drive, 0, &sense); + if (stat) return stat; + } + + return cdrom_eject(drive, !position, &sense); +} + +static +int ide_cdrom_lock_door (struct cdrom_device_info *cdi, int lock) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + return cdrom_lockdoor(drive, lock, NULL); +} + +static +int ide_cdrom_select_speed (struct cdrom_device_info *cdi, int speed) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct request_sense sense; + int stat; + + if ((stat = cdrom_select_speed(drive, speed, &sense)) < 0) + return stat; + + cdi->speed = CDROM_STATE_FLAGS(drive)->current_speed; + return 0; +} + +/* + * add logic to try GET_EVENT command first to check for media and tray + * status. this should be supported by newer cd-r/w and all DVD etc + * drives + */ +static +int ide_cdrom_drive_status (struct cdrom_device_info *cdi, int slot_nr) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct media_event_desc med; + struct request_sense sense; + int stat; + + if (slot_nr != CDSL_CURRENT) + return -EINVAL; + + stat = cdrom_check_status(drive, &sense); + if (!stat || sense.sense_key == UNIT_ATTENTION) + return CDS_DISC_OK; + + if (!cdrom_get_media_event(cdi, &med)) { + if (med.media_present) + return CDS_DISC_OK; + else if (med.door_open) + return CDS_TRAY_OPEN; + else + return CDS_NO_DISC; + } + + if (sense.sense_key == NOT_READY && sense.asc == 0x04 && sense.ascq == 0x04) + return CDS_DISC_OK; + + /* + * If not using Mt Fuji extended media tray reports, + * just return TRAY_OPEN since ATAPI doesn't provide + * any other way to detect this... + */ + if (sense.sense_key == NOT_READY) { + if (sense.asc == 0x3a) { + if (sense.ascq == 1) + return CDS_NO_DISC; + else if (sense.ascq == 0 || sense.ascq == 2) + return CDS_TRAY_OPEN; + } + } + + return CDS_DRIVE_NOT_READY; +} + +static +int ide_cdrom_get_last_session (struct cdrom_device_info *cdi, + struct cdrom_multisession *ms_info) +{ + struct atapi_toc *toc; + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + struct cdrom_info *info = drive->driver_data; + struct request_sense sense; + int ret; + + if (!CDROM_STATE_FLAGS(drive)->toc_valid || info->toc == NULL) + if ((ret = cdrom_read_toc(drive, &sense))) + return ret; + + toc = info->toc; + ms_info->addr.lba = toc->last_session_lba; + ms_info->xa_flag = toc->xa_flag; + + return 0; +} + +static +int ide_cdrom_get_mcn (struct cdrom_device_info *cdi, + struct cdrom_mcn *mcn_info) +{ + int stat; + char mcnbuf[24]; + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + +/* get MCN */ + if ((stat = cdrom_read_subchannel(drive, 2, mcnbuf, sizeof (mcnbuf), NULL))) + return stat; + + memcpy (mcn_info->medium_catalog_number, mcnbuf+9, + sizeof (mcn_info->medium_catalog_number)-1); + mcn_info->medium_catalog_number[sizeof (mcn_info->medium_catalog_number)-1] + = '\0'; + + return 0; +} + + + +/**************************************************************************** + * Other driver requests (open, close, check media change). + */ + +static +int ide_cdrom_check_media_change_real (struct cdrom_device_info *cdi, + int slot_nr) +{ + ide_drive_t *drive = (ide_drive_t*) cdi->handle; + int retval; + + if (slot_nr == CDSL_CURRENT) { + (void) cdrom_check_status(drive, NULL); + retval = CDROM_STATE_FLAGS(drive)->media_changed; + CDROM_STATE_FLAGS(drive)->media_changed = 0; + return retval; + } else { + return -EINVAL; + } +} + + +static +int ide_cdrom_open_real (struct cdrom_device_info *cdi, int purpose) +{ + return 0; +} + +/* + * Close down the device. Invalidate all cached blocks. + */ + +static +void ide_cdrom_release_real (struct cdrom_device_info *cdi) +{ + ide_drive_t *drive = cdi->handle; + + if (!cdi->use_count) + CDROM_STATE_FLAGS(drive)->toc_valid = 0; +} + + + +/**************************************************************************** + * Device initialization. + */ +static struct cdrom_device_ops ide_cdrom_dops = { + .open = ide_cdrom_open_real, + .release = ide_cdrom_release_real, + .drive_status = ide_cdrom_drive_status, + .media_changed = ide_cdrom_check_media_change_real, + .tray_move = ide_cdrom_tray_move, + .lock_door = ide_cdrom_lock_door, + .select_speed = ide_cdrom_select_speed, + .get_last_session = ide_cdrom_get_last_session, + .get_mcn = ide_cdrom_get_mcn, + .reset = ide_cdrom_reset, + .audio_ioctl = ide_cdrom_audio_ioctl, + .dev_ioctl = ide_cdrom_dev_ioctl, + .capability = CDC_CLOSE_TRAY | CDC_OPEN_TRAY | CDC_LOCK | + CDC_SELECT_SPEED | CDC_SELECT_DISC | + CDC_MULTI_SESSION | CDC_MCN | + CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET | + CDC_IOCTLS | CDC_DRIVE_STATUS | CDC_CD_R | + CDC_CD_RW | CDC_DVD | CDC_DVD_R| CDC_DVD_RAM | + CDC_GENERIC_PACKET | CDC_MO_DRIVE | CDC_MRW | + CDC_MRW_W | CDC_RAM, + .generic_packet = ide_cdrom_packet, +}; + +static int ide_cdrom_register (ide_drive_t *drive, int nslots) +{ + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *devinfo = &info->devinfo; + + devinfo->ops = &ide_cdrom_dops; + devinfo->mask = 0; + devinfo->speed = CDROM_STATE_FLAGS(drive)->current_speed; + devinfo->capacity = nslots; + devinfo->handle = (void *) drive; + strcpy(devinfo->name, drive->name); + + /* set capability mask to match the probe. */ + if (!CDROM_CONFIG_FLAGS(drive)->cd_r) + devinfo->mask |= CDC_CD_R; + if (!CDROM_CONFIG_FLAGS(drive)->cd_rw) + devinfo->mask |= CDC_CD_RW; + if (!CDROM_CONFIG_FLAGS(drive)->dvd) + devinfo->mask |= CDC_DVD; + if (!CDROM_CONFIG_FLAGS(drive)->dvd_r) + devinfo->mask |= CDC_DVD_R; + if (!CDROM_CONFIG_FLAGS(drive)->dvd_ram) + devinfo->mask |= CDC_DVD_RAM; + if (!CDROM_CONFIG_FLAGS(drive)->is_changer) + devinfo->mask |= CDC_SELECT_DISC; + if (!CDROM_CONFIG_FLAGS(drive)->audio_play) + devinfo->mask |= CDC_PLAY_AUDIO; + if (!CDROM_CONFIG_FLAGS(drive)->close_tray) + devinfo->mask |= CDC_CLOSE_TRAY; + if (!CDROM_CONFIG_FLAGS(drive)->mo_drive) + devinfo->mask |= CDC_MO_DRIVE; + + devinfo->disk = info->disk; + return register_cdrom(devinfo); +} + +static +int ide_cdrom_get_capabilities(ide_drive_t *drive, struct atapi_capabilities_page *cap) +{ + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *cdi = &info->devinfo; + struct packet_command cgc; + int stat, attempts = 3, size = sizeof(*cap); + + /* + * ACER50 (and others?) require the full spec length mode sense + * page capabilities size, but older drives break. + */ + if (!(!strcmp(drive->id->model, "ATAPI CD ROM DRIVE 50X MAX") || + !strcmp(drive->id->model, "WPI CDS-32X"))) + size -= sizeof(cap->pad); + + init_cdrom_command(&cgc, cap, size, CGC_DATA_UNKNOWN); + do { /* we seem to get stat=0x01,err=0x00 the first time (??) */ + stat = cdrom_mode_sense(cdi, &cgc, GPMODE_CAPABILITIES_PAGE, 0); + if (!stat) + break; + } while (--attempts); + return stat; +} + +static +int ide_cdrom_probe_capabilities (ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *cdi = &info->devinfo; + struct atapi_capabilities_page cap; + int nslots = 1; + + if (drive->media == ide_optical) { + CDROM_CONFIG_FLAGS(drive)->mo_drive = 1; + CDROM_CONFIG_FLAGS(drive)->ram = 1; + printk(KERN_ERR "%s: ATAPI magneto-optical drive\n", drive->name); + return nslots; + } + + if (CDROM_CONFIG_FLAGS(drive)->nec260 || + !strcmp(drive->id->model,"STINGRAY 8422 IDE 8X CD-ROM 7-27-95")) { + CDROM_CONFIG_FLAGS(drive)->no_eject = 0; + CDROM_CONFIG_FLAGS(drive)->audio_play = 1; + return nslots; + } + + /* + * we have to cheat a little here. the packet will eventually + * be queued with ide_cdrom_packet(), which extracts the + * drive from cdi->handle. Since this device hasn't been + * registered with the Uniform layer yet, it can't do this. + * Same goes for cdi->ops. + */ + cdi->handle = (ide_drive_t *) drive; + cdi->ops = &ide_cdrom_dops; + + if (ide_cdrom_get_capabilities(drive, &cap)) + return 0; + + if (cap.lock == 0) + CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1; + if (cap.eject) + CDROM_CONFIG_FLAGS(drive)->no_eject = 0; + if (cap.cd_r_write) + CDROM_CONFIG_FLAGS(drive)->cd_r = 1; + if (cap.cd_rw_write) { + CDROM_CONFIG_FLAGS(drive)->cd_rw = 1; + CDROM_CONFIG_FLAGS(drive)->ram = 1; + } + if (cap.test_write) + CDROM_CONFIG_FLAGS(drive)->test_write = 1; + if (cap.dvd_ram_read || cap.dvd_r_read || cap.dvd_rom) + CDROM_CONFIG_FLAGS(drive)->dvd = 1; + if (cap.dvd_ram_write) { + CDROM_CONFIG_FLAGS(drive)->dvd_ram = 1; + CDROM_CONFIG_FLAGS(drive)->ram = 1; + } + if (cap.dvd_r_write) + CDROM_CONFIG_FLAGS(drive)->dvd_r = 1; + if (cap.audio_play) + CDROM_CONFIG_FLAGS(drive)->audio_play = 1; + if (cap.mechtype == mechtype_caddy || cap.mechtype == mechtype_popup) + CDROM_CONFIG_FLAGS(drive)->close_tray = 0; + + /* Some drives used by Apple don't advertise audio play + * but they do support reading TOC & audio datas + */ + if (strcmp(drive->id->model, "MATSHITADVD-ROM SR-8187") == 0 || + strcmp(drive->id->model, "MATSHITADVD-ROM SR-8186") == 0 || + strcmp(drive->id->model, "MATSHITADVD-ROM SR-8176") == 0 || + strcmp(drive->id->model, "MATSHITADVD-ROM SR-8174") == 0) + CDROM_CONFIG_FLAGS(drive)->audio_play = 1; + +#if ! STANDARD_ATAPI + if (cdi->sanyo_slot > 0) { + CDROM_CONFIG_FLAGS(drive)->is_changer = 1; + nslots = 3; + } + + else +#endif /* not STANDARD_ATAPI */ + if (cap.mechtype == mechtype_individual_changer || + cap.mechtype == mechtype_cartridge_changer) { + if ((nslots = cdrom_number_of_slots(cdi)) > 1) { + CDROM_CONFIG_FLAGS(drive)->is_changer = 1; + CDROM_CONFIG_FLAGS(drive)->supp_disc_present = 1; + } + } + + /* The ACER/AOpen 24X cdrom has the speed fields byte-swapped */ + if (!drive->id->model[0] && + !strncmp(drive->id->fw_rev, "241N", 4)) { + CDROM_STATE_FLAGS(drive)->current_speed = + (((unsigned int)cap.curspeed) + (176/2)) / 176; + CDROM_CONFIG_FLAGS(drive)->max_speed = + (((unsigned int)cap.maxspeed) + (176/2)) / 176; + } else { + CDROM_STATE_FLAGS(drive)->current_speed = + (ntohs(cap.curspeed) + (176/2)) / 176; + CDROM_CONFIG_FLAGS(drive)->max_speed = + (ntohs(cap.maxspeed) + (176/2)) / 176; + } + + /* don't print speed if the drive reported 0. + */ + printk(KERN_INFO "%s: ATAPI", drive->name); + if (CDROM_CONFIG_FLAGS(drive)->max_speed) + printk(" %dX", CDROM_CONFIG_FLAGS(drive)->max_speed); + printk(" %s", CDROM_CONFIG_FLAGS(drive)->dvd ? "DVD-ROM" : "CD-ROM"); + + if (CDROM_CONFIG_FLAGS(drive)->dvd_r|CDROM_CONFIG_FLAGS(drive)->dvd_ram) + printk(" DVD%s%s", + (CDROM_CONFIG_FLAGS(drive)->dvd_r)? "-R" : "", + (CDROM_CONFIG_FLAGS(drive)->dvd_ram)? "-RAM" : ""); + + if (CDROM_CONFIG_FLAGS(drive)->cd_r|CDROM_CONFIG_FLAGS(drive)->cd_rw) + printk(" CD%s%s", + (CDROM_CONFIG_FLAGS(drive)->cd_r)? "-R" : "", + (CDROM_CONFIG_FLAGS(drive)->cd_rw)? "/RW" : ""); + + if (CDROM_CONFIG_FLAGS(drive)->is_changer) + printk(" changer w/%d slots", nslots); + else + printk(" drive"); + + printk(", %dkB Cache", be16_to_cpu(cap.buffer_size)); + + if (drive->using_dma) + ide_dma_verbose(drive); + + printk("\n"); + + return nslots; +} + +static void ide_cdrom_add_settings(ide_drive_t *drive) +{ + ide_add_setting(drive, "dsc_overlap", SETTING_RW, -1, -1, TYPE_BYTE, 0, 1, 1, 1, &drive->dsc_overlap, NULL); +} + +/* + * standard prep_rq_fn that builds 10 byte cmds + */ +static int ide_cdrom_prep_fs(request_queue_t *q, struct request *rq) +{ + int hard_sect = queue_hardsect_size(q); + long block = (long)rq->hard_sector / (hard_sect >> 9); + unsigned long blocks = rq->hard_nr_sectors / (hard_sect >> 9); + + memset(rq->cmd, 0, sizeof(rq->cmd)); + + if (rq_data_dir(rq) == READ) + rq->cmd[0] = GPCMD_READ_10; + else + rq->cmd[0] = GPCMD_WRITE_10; + + /* + * fill in lba + */ + rq->cmd[2] = (block >> 24) & 0xff; + rq->cmd[3] = (block >> 16) & 0xff; + rq->cmd[4] = (block >> 8) & 0xff; + rq->cmd[5] = block & 0xff; + + /* + * and transfer length + */ + rq->cmd[7] = (blocks >> 8) & 0xff; + rq->cmd[8] = blocks & 0xff; + rq->cmd_len = 10; + return BLKPREP_OK; +} + +/* + * Most of the SCSI commands are supported directly by ATAPI devices. + * This transform handles the few exceptions. + */ +static int ide_cdrom_prep_pc(struct request *rq) +{ + u8 *c = rq->cmd; + + /* + * Transform 6-byte read/write commands to the 10-byte version + */ + if (c[0] == READ_6 || c[0] == WRITE_6) { + c[8] = c[4]; + c[5] = c[3]; + c[4] = c[2]; + c[3] = c[1] & 0x1f; + c[2] = 0; + c[1] &= 0xe0; + c[0] += (READ_10 - READ_6); + rq->cmd_len = 10; + return BLKPREP_OK; + } + + /* + * it's silly to pretend we understand 6-byte sense commands, just + * reject with ILLEGAL_REQUEST and the caller should take the + * appropriate action + */ + if (c[0] == MODE_SENSE || c[0] == MODE_SELECT) { + rq->errors = ILLEGAL_REQUEST; + return BLKPREP_KILL; + } + + return BLKPREP_OK; +} + +static int ide_cdrom_prep_fn(request_queue_t *q, struct request *rq) +{ + if (rq->flags & REQ_CMD) + return ide_cdrom_prep_fs(q, rq); + else if (rq->flags & REQ_BLOCK_PC) + return ide_cdrom_prep_pc(rq); + + return 0; +} + +static +int ide_cdrom_setup (ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + struct cdrom_device_info *cdi = &info->devinfo; + int nslots; + + blk_queue_prep_rq(drive->queue, ide_cdrom_prep_fn); + blk_queue_dma_alignment(drive->queue, 31); + drive->queue->unplug_delay = (1 * HZ) / 1000; + if (!drive->queue->unplug_delay) + drive->queue->unplug_delay = 1; + + drive->special.all = 0; + + CDROM_STATE_FLAGS(drive)->media_changed = 1; + CDROM_STATE_FLAGS(drive)->toc_valid = 0; + CDROM_STATE_FLAGS(drive)->door_locked = 0; + +#if NO_DOOR_LOCKING + CDROM_CONFIG_FLAGS(drive)->no_doorlock = 1; +#else + CDROM_CONFIG_FLAGS(drive)->no_doorlock = 0; +#endif + + CDROM_CONFIG_FLAGS(drive)->drq_interrupt = ((drive->id->config & 0x0060) == 0x20); + CDROM_CONFIG_FLAGS(drive)->is_changer = 0; + CDROM_CONFIG_FLAGS(drive)->cd_r = 0; + CDROM_CONFIG_FLAGS(drive)->cd_rw = 0; + CDROM_CONFIG_FLAGS(drive)->test_write = 0; + CDROM_CONFIG_FLAGS(drive)->dvd = 0; + CDROM_CONFIG_FLAGS(drive)->dvd_r = 0; + CDROM_CONFIG_FLAGS(drive)->dvd_ram = 0; + CDROM_CONFIG_FLAGS(drive)->no_eject = 1; + CDROM_CONFIG_FLAGS(drive)->supp_disc_present = 0; + CDROM_CONFIG_FLAGS(drive)->audio_play = 0; + CDROM_CONFIG_FLAGS(drive)->close_tray = 1; + + /* limit transfer size per interrupt. */ + CDROM_CONFIG_FLAGS(drive)->limit_nframes = 0; + /* a testament to the nice quality of Samsung drives... */ + if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2430")) + CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1; + else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-2432")) + CDROM_CONFIG_FLAGS(drive)->limit_nframes = 1; + /* the 3231 model does not support the SET_CD_SPEED command */ + else if (!strcmp(drive->id->model, "SAMSUNG CD-ROM SCR-3231")) + cdi->mask |= CDC_SELECT_SPEED; + +#if ! STANDARD_ATAPI + /* by default Sanyo 3 CD changer support is turned off and + ATAPI Rev 2.2+ standard support for CD changers is used */ + cdi->sanyo_slot = 0; + + CDROM_CONFIG_FLAGS(drive)->nec260 = 0; + CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 0; + CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 0; + CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 0; + CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 0; + + if (strcmp (drive->id->model, "V003S0DS") == 0 && + drive->id->fw_rev[4] == '1' && + drive->id->fw_rev[6] <= '2') { + /* Vertos 300. + Some versions of this drive like to talk BCD. */ + CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1; + } + + else if (strcmp (drive->id->model, "V006E0DS") == 0 && + drive->id->fw_rev[4] == '1' && + drive->id->fw_rev[6] <= '2') { + /* Vertos 600 ESD. */ + CDROM_CONFIG_FLAGS(drive)->toctracks_as_bcd = 1; + } + else if (strcmp(drive->id->model, "NEC CD-ROM DRIVE:260") == 0 && + strncmp(drive->id->fw_rev, "1.01", 4) == 0) { /* FIXME */ + /* Old NEC260 (not R). + This drive was released before the 1.2 version + of the spec. */ + CDROM_CONFIG_FLAGS(drive)->tocaddr_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->nec260 = 1; + } + else if (strcmp(drive->id->model, "WEARNES CDD-120") == 0 && + strncmp(drive->id->fw_rev, "A1.1", 4) == 0) { /* FIXME */ + /* Wearnes */ + CDROM_CONFIG_FLAGS(drive)->playmsf_as_bcd = 1; + CDROM_CONFIG_FLAGS(drive)->subchan_as_bcd = 1; + } + /* Sanyo 3 CD changer uses a non-standard command + for CD changing */ + else if ((strcmp(drive->id->model, "CD-ROM CDR-C3 G") == 0) || + (strcmp(drive->id->model, "CD-ROM CDR-C3G") == 0) || + (strcmp(drive->id->model, "CD-ROM CDR_C36") == 0)) { + /* uses CD in slot 0 when value is set to 3 */ + cdi->sanyo_slot = 3; + } +#endif /* not STANDARD_ATAPI */ + + info->toc = NULL; + info->buffer = NULL; + info->sector_buffered = 0; + info->nsectors_buffered = 0; + info->changer_info = NULL; + info->last_block = 0; + info->start_seek = 0; + + nslots = ide_cdrom_probe_capabilities (drive); + + /* + * set correct block size + */ + blk_queue_hardsect_size(drive->queue, CD_FRAMESIZE); + + if (drive->autotune == IDE_TUNE_DEFAULT || + drive->autotune == IDE_TUNE_AUTO) + drive->dsc_overlap = (drive->next != drive); +#if 0 + drive->dsc_overlap = (HWIF(drive)->no_dsc) ? 0 : 1; + if (HWIF(drive)->no_dsc) { + printk(KERN_INFO "ide-cd: %s: disabling DSC overlap\n", + drive->name); + drive->dsc_overlap = 0; + } +#endif + + if (ide_cdrom_register(drive, nslots)) { + printk (KERN_ERR "%s: ide_cdrom_setup failed to register device with the cdrom driver.\n", drive->name); + info->devinfo.handle = NULL; + return 1; + } + ide_cdrom_add_settings(drive); + return 0; +} + +static +sector_t ide_cdrom_capacity (ide_drive_t *drive) +{ + unsigned long capacity, sectors_per_frame; + + if (cdrom_read_capacity(drive, &capacity, §ors_per_frame, NULL)) + return 0; + + return capacity * sectors_per_frame; +} + +static +int ide_cdrom_cleanup(ide_drive_t *drive) +{ + struct cdrom_info *info = drive->driver_data; + + if (ide_unregister_subdriver(drive)) { + printk(KERN_ERR "%s: %s: failed to ide_unregister_subdriver\n", + __FUNCTION__, drive->name); + return 1; + } + + del_gendisk(info->disk); + + ide_cd_put(info); + + return 0; +} + +static void ide_cd_release(struct kref *kref) +{ + struct cdrom_info *info = to_ide_cd(kref); + struct cdrom_device_info *devinfo = &info->devinfo; + ide_drive_t *drive = info->drive; + struct gendisk *g = info->disk; + + if (info->buffer != NULL) + kfree(info->buffer); + if (info->toc != NULL) + kfree(info->toc); + if (info->changer_info != NULL) + kfree(info->changer_info); + if (devinfo->handle == drive && unregister_cdrom(devinfo)) + printk(KERN_ERR "%s: %s failed to unregister device from the cdrom " + "driver.\n", __FUNCTION__, drive->name); + drive->dsc_overlap = 0; + drive->driver_data = NULL; + blk_queue_prep_rq(drive->queue, NULL); + g->private_data = NULL; + put_disk(g); + kfree(info); +} + +static int ide_cdrom_attach (ide_drive_t *drive); + +#ifdef CONFIG_PROC_FS +static int proc_idecd_read_capacity + (char *page, char **start, off_t off, int count, int *eof, void *data) +{ + ide_drive_t*drive = (ide_drive_t *)data; + int len; + + len = sprintf(page,"%llu\n", (long long)ide_cdrom_capacity(drive)); + PROC_IDE_READ_RETURN(page,start,off,count,eof,len); +} + +static ide_proc_entry_t idecd_proc[] = { + { "capacity", S_IFREG|S_IRUGO, proc_idecd_read_capacity, NULL }, + { NULL, 0, NULL, NULL } +}; +#else +# define idecd_proc NULL +#endif + +static ide_driver_t ide_cdrom_driver = { + .owner = THIS_MODULE, + .name = "ide-cdrom", + .version = IDECD_VERSION, + .media = ide_cdrom, + .busy = 0, + .supports_dsc_overlap = 1, + .cleanup = ide_cdrom_cleanup, + .do_request = ide_do_rw_cdrom, + .end_request = ide_end_request, + .error = __ide_error, + .abort = __ide_abort, + .proc = idecd_proc, + .attach = ide_cdrom_attach, + .drives = LIST_HEAD_INIT(ide_cdrom_driver.drives), +}; + +static int idecd_open(struct inode * inode, struct file * file) +{ + struct gendisk *disk = inode->i_bdev->bd_disk; + struct cdrom_info *info; + ide_drive_t *drive; + int rc = -ENOMEM; + + if (!(info = ide_cd_get(disk))) + return -ENXIO; + + drive = info->drive; + + drive->usage++; + + if (!info->buffer) + info->buffer = kmalloc(SECTOR_BUFFER_SIZE, + GFP_KERNEL|__GFP_REPEAT); + if (!info->buffer || (rc = cdrom_open(&info->devinfo, inode, file))) + drive->usage--; + + if (rc < 0) + ide_cd_put(info); + + return rc; +} + +static int idecd_release(struct inode * inode, struct file * file) +{ + struct gendisk *disk = inode->i_bdev->bd_disk; + struct cdrom_info *info = ide_cd_g(disk); + ide_drive_t *drive = info->drive; + + cdrom_release (&info->devinfo, file); + drive->usage--; + + ide_cd_put(info); + + return 0; +} + +static int idecd_ioctl (struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct block_device *bdev = inode->i_bdev; + struct cdrom_info *info = ide_cd_g(bdev->bd_disk); + int err; + + err = generic_ide_ioctl(info->drive, file, bdev, cmd, arg); + if (err == -EINVAL) + err = cdrom_ioctl(file, &info->devinfo, inode, cmd, arg); + + return err; +} + +static int idecd_media_changed(struct gendisk *disk) +{ + struct cdrom_info *info = ide_cd_g(disk); + return cdrom_media_changed(&info->devinfo); +} + +static int idecd_revalidate_disk(struct gendisk *disk) +{ + struct cdrom_info *info = ide_cd_g(disk); + struct request_sense sense; + cdrom_read_toc(info->drive, &sense); + return 0; +} + +static struct block_device_operations idecd_ops = { + .owner = THIS_MODULE, + .open = idecd_open, + .release = idecd_release, + .ioctl = idecd_ioctl, + .media_changed = idecd_media_changed, + .revalidate_disk= idecd_revalidate_disk +}; + +/* options */ +static char *ignore = NULL; + +module_param(ignore, charp, 0400); +MODULE_DESCRIPTION("ATAPI CD-ROM Driver"); + +static int ide_cdrom_attach (ide_drive_t *drive) +{ + struct cdrom_info *info; + struct gendisk *g; + struct request_sense sense; + + if (!strstr("ide-cdrom", drive->driver_req)) + goto failed; + if (!drive->present) + goto failed; + if (drive->media != ide_cdrom && drive->media != ide_optical) + goto failed; + /* skip drives that we were told to ignore */ + if (ignore != NULL) { + if (strstr(ignore, drive->name)) { + printk(KERN_INFO "ide-cd: ignoring drive %s\n", drive->name); + goto failed; + } + } + if (drive->scsi) { + printk(KERN_INFO "ide-cd: passing drive %s to ide-scsi emulation.\n", drive->name); + goto failed; + } + info = (struct cdrom_info *) kmalloc (sizeof (struct cdrom_info), GFP_KERNEL); + if (info == NULL) { + printk(KERN_ERR "%s: Can't allocate a cdrom structure\n", drive->name); + goto failed; + } + + g = alloc_disk(1 << PARTN_BITS); + if (!g) + goto out_free_cd; + + ide_init_disk(g, drive); + + if (ide_register_subdriver(drive, &ide_cdrom_driver)) { + printk(KERN_ERR "%s: Failed to register the driver with ide.c\n", + drive->name); + goto out_put_disk; + } + memset(info, 0, sizeof (struct cdrom_info)); + + kref_init(&info->kref); + + info->drive = drive; + info->driver = &ide_cdrom_driver; + info->disk = g; + + g->private_data = &info->driver; + + drive->driver_data = info; + + DRIVER(drive)->busy++; + g->minors = 1; + snprintf(g->devfs_name, sizeof(g->devfs_name), + "%s/cd", drive->devfs_name); + g->driverfs_dev = &drive->gendev; + g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE; + if (ide_cdrom_setup(drive)) { + struct cdrom_device_info *devinfo = &info->devinfo; + DRIVER(drive)->busy--; + ide_unregister_subdriver(drive); + if (info->buffer != NULL) + kfree(info->buffer); + if (info->toc != NULL) + kfree(info->toc); + if (info->changer_info != NULL) + kfree(info->changer_info); + if (devinfo->handle == drive && unregister_cdrom(devinfo)) + printk (KERN_ERR "%s: ide_cdrom_cleanup failed to unregister device from the cdrom driver.\n", drive->name); + kfree(info); + drive->driver_data = NULL; + goto failed; + } + DRIVER(drive)->busy--; + + cdrom_read_toc(drive, &sense); + g->fops = &idecd_ops; + g->flags |= GENHD_FL_REMOVABLE; + add_disk(g); + return 0; + +out_put_disk: + put_disk(g); +out_free_cd: + kfree(info); +failed: + return 1; +} + +static void __exit ide_cdrom_exit(void) +{ + ide_unregister_driver(&ide_cdrom_driver); +} + +static int ide_cdrom_init(void) +{ + ide_register_driver(&ide_cdrom_driver); + return 0; +} + +module_init(ide_cdrom_init); +module_exit(ide_cdrom_exit); +MODULE_LICENSE("GPL"); |
