--- /dev/null
+/* linux/drivers/cdrom/cdrom.c
+ Copyright (c) 1996, 1997 David A. van Leeuwen.
+ Copyright (c) 1997, 1998 Erik Andersen <andersee@debian.org>
+ Copyright (c) 1998, 1999 Jens Axboe <axboe@image.dk>
+
+ May be copied or modified under the terms of the GNU General Public
+ License. See linux/COPYING for more information.
+
+ Uniform CD-ROM driver for Linux.
+ See Documentation/cdrom/cdrom-standard.tex for usage information.
+
+ The routines in the file provide a uniform interface between the
+ software that uses CD-ROMs and the various low-level drivers that
+ actually talk to the hardware. Suggestions are welcome.
+ Patches that work are more welcome though. ;-)
+
+ To Do List:
+ ----------------------------------
+
+ -- Modify sysctl/proc interface. I plan on having one directory per
+ drive, with entries for outputing general drive information, and sysctl
+ based tunable parameters such as whether the tray should auto-close for
+ that drive. Suggestions (or patches) for this welcome!
+
+
+ Revision History
+ ----------------------------------
+ 1.00 Date Unknown -- David van Leeuwen <david@tm.tno.nl>
+ -- Initial version by David A. van Leeuwen. I don't have a detailed
+ changelog for the 1.x series, David?
+
+2.00 Dec 2, 1997 -- Erik Andersen <andersee@debian.org>
+ -- New maintainer! As David A. van Leeuwen has been too busy to actively
+ maintain and improve this driver, I am now carrying on the torch. If
+ you have a problem with this driver, please feel free to contact me.
+
+ -- Added (rudimentary) sysctl interface. I realize this is really weak
+ right now, and is _very_ badly implemented. It will be improved...
+
+ -- Modified CDROM_DISC_STATUS so that it is now incorporated into
+ the Uniform CD-ROM driver via the cdrom_count_tracks function.
+ The cdrom_count_tracks function helps resolve some of the false
+ assumptions of the CDROM_DISC_STATUS ioctl, and is also used to check
+ for the correct media type when mounting or playing audio from a CD.
+
+ -- Remove the calls to verify_area and only use the copy_from_user and
+ copy_to_user stuff, since these calls now provide their own memory
+ checking with the 2.1.x kernels.
+
+ -- Major update to return codes so that errors from low-level drivers
+ are passed on through (thanks to Gerd Knorr for pointing out this
+ problem).
+
+ -- Made it so if a function isn't implemented in a low-level driver,
+ ENOSYS is now returned instead of EINVAL.
+
+ -- Simplified some complex logic so that the source code is easier to read.
+
+ -- Other stuff I probably forgot to mention (lots of changes).
+
+2.01 to 2.11 Dec 1997-Jan 1998
+ -- TO-DO! Write changelogs for 2.01 to 2.12.
+
+2.12 Jan 24, 1998 -- Erik Andersen <andersee@debian.org>
+ -- Fixed a bug in the IOCTL_IN and IOCTL_OUT macros. It turns out that
+ copy_*_user does not return EFAULT on error, but instead returns the number
+ of bytes not copied. I was returning whatever non-zero stuff came back from
+ the copy_*_user functions directly, which would result in strange errors.
+
+2.13 July 17, 1998 -- Erik Andersen <andersee@debian.org>
+ -- Fixed a bug in CDROM_SELECT_SPEED where you couldn't lower the speed
+ of the drive. Thanks to Tobias Ringstr|m <tori@prosolvia.se> for pointing
+ this out and providing a simple fix.
+ -- Fixed the procfs-unload-module bug with the fill_inode procfs callback.
+ thanks to Andrea Arcangeli
+ -- Fixed it so that the /proc entry now also shows up when cdrom is
+ compiled into the kernel. Before it only worked when loaded as a module.
+
+ 2.14 August 17, 1998 -- Erik Andersen <andersee@debian.org>
+ -- Fixed a bug in cdrom_media_changed and handling of reporting that
+ the media had changed for devices that _don't_ implement media_changed.
+ Thanks to Grant R. Guenther <grant@torque.net> for spotting this bug.
+ -- Made a few things more pedanticly correct.
+
+2.50 Oct 19, 1998 - Jens Axboe <axboe@image.dk>
+ -- New maintainers! Erik was too busy to continue the work on the driver,
+ so now Chris Zwilling <chris@cloudnet.com> and Jens Axboe <axboe@image.dk>
+ will do their best to follow in his footsteps
+
+ 2.51 Dec 20, 1998 - Jens Axboe <axboe@image.dk>
+ -- Check if drive is capable of doing what we ask before blindly changing
+ cdi->options in various ioctl.
+ -- Added version to proc entry.
+
+ 2.52 Jan 16, 1999 - Jens Axboe <axboe@image.dk>
+ -- Fixed an error in open_for_data where we would sometimes not return
+ the correct error value. Thanks Huba Gaspar <huba@softcell.hu>.
+ -- Fixed module usage count - usage was based on /proc/sys/dev
+ instead of /proc/sys/dev/cdrom. This could lead to an oops when other
+ modules had entries in dev. Feb 02 - real bug was in sysctl.c where
+ dev would be removed even though it was used. cdrom.c just illuminated
+ that bug.
+
+ 2.53 Feb 22, 1999 - Jens Axboe <axboe@image.dk>
+ -- Fixup of several ioctl calls, in particular CDROM_SET_OPTIONS has
+ been "rewritten" because capabilities and options aren't in sync. They
+ should be...
+ -- Added CDROM_LOCKDOOR ioctl. Locks the door and keeps it that way.
+ -- Added CDROM_RESET ioctl.
+ -- Added CDROM_DEBUG ioctl. Enable debug messages on-the-fly.
+ -- Added CDROM_GET_CAPABILITY ioctl. This relieves userspace programs
+ from parsing /proc/sys/dev/cdrom/info.
+
+ 2.54 Mar 15, 1999 - Jens Axboe <axboe@image.dk>
+ -- Check capability mask from low level driver when counting tracks as
+ per suggestion from Corey J. Scotts <cstotts@blue.weeg.uiowa.edu>.
+
+ 2.55 Apr 25, 1999 - Jens Axboe <axboe@image.dk>
+ -- autoclose was mistakenly checked against CDC_OPEN_TRAY instead of
+ CDC_CLOSE_TRAY.
+ -- proc info didn't mask against capabilities mask.
+
+ 3.00 Aug 5, 1999 - Jens Axboe <axboe@image.dk>
+ -- Unified audio ioctl handling across CD-ROM drivers. A lot of the
+ code was duplicated before. Drives that support the generic packet
+ interface are now being fed packets from here instead.
+ -- First attempt at adding support for MMC2 commands - for DVD and
+ CD-R(W) drives. Only the DVD parts are in now - the interface used is
+ the same as for the audio ioctls.
+ -- ioctl cleanups. if a drive couldn't play audio, it didn't get
+ a change to perform device specific ioctls as well.
+ -- Defined CDROM_CAN(CDC_XXX) for checking the capabilities.
+ -- Put in sysctl files for autoclose, autoeject, check_media, debug,
+ and lock.
+ -- /proc/sys/dev/cdrom/info has been updated to also contain info about
+ CD-Rx and DVD capabilities.
+ -- Now default to checking media type.
+ -- CDROM_SEND_PACKET ioctl added. The infrastructure was in place for
+ doing this anyway, with the generic_packet addition.
+
+ 3.01 Aug 6, 1999 - Jens Axboe <axboe@image.dk>
+ -- Fix up the sysctl handling so that the option flags get set
+ correctly.
+ -- Fix up ioctl handling so the device specific ones actually get
+ called :).
+
+ 3.02 Aug 8, 1999 - Jens Axboe <axboe@image.dk>
+ -- Fixed volume control on SCSI drives (or others with longer audio
+ page).
+ -- Fixed a couple of DVD minors. Thanks to Andrew T. Veliath
+ <andrewtv@usa.net> for telling me and for having defined the various
+ DVD structures and ioctls in the first place! He designed the original
+ DVD patches for ide-cd and while I rearranged and unified them, the
+ interface is still the same.
+
+ 3.03 Sep 1, 1999 - Jens Axboe <axboe@image.dk>
+ -- Moved the rest of the audio ioctls from the CD-ROM drivers here. Only
+ CDROMREADTOCENTRY and CDROMREADTOCHDR are left.
+ -- Moved the CDROMREADxxx ioctls in here.
+ -- Defined the cdrom_get_last_written and cdrom_get_next_block as ioctls
+ and exported functions.
+ -- Erik Andersen <andersen@xmission.com> modified all SCMD_ commands
+ to now read GPCMD_ for the new generic packet interface. All low level
+ drivers are updated as well.
+ -- Various other cleanups.
+
+ 3.04 Sep 12, 1999 - Jens Axboe <axboe@image.dk>
+ -- Fixed a couple of possible memory leaks (if an operation failed and
+ we didn't free the buffer before returning the error).
+ -- Integrated Uniform CD Changer handling from Richard Sharman
+ <rsharman@pobox.com>.
+ -- Defined CD_DVD and CD_CHANGER log levels.
+ -- Fixed the CDROMREADxxx ioctls.
+ -- CDROMPLAYTRKIND uses the GPCMD_PLAY_AUDIO_MSF command - too few
+ drives supported it. We lose the index part, however.
+ -- Small modifications to accommodate opens of /dev/hdc1, required
+ for ide-cd to handle multisession discs.
+ -- Export cdrom_mode_sense and cdrom_mode_select.
+ -- init_cdrom_command() for setting up a cgc command.
+
+ 3.05 Oct 24, 1999 - Jens Axboe <axboe@image.dk>
+ -- Changed the interface for CDROM_SEND_PACKET. Before it was virtually
+ impossible to send the drive data in a sensible way.
+ -- Lowered stack usage in mmc_ioctl(), dvd_read_disckey(), and
+ dvd_read_manufact.
+ -- Added setup of write mode for packet writing.
+ -- Fixed CDDA ripping with cdda2wav - accept much larger requests of
+ number of frames and split the reads in blocks of 8.
+
+ 3.06 Dec 13, 1999 - Jens Axboe <axboe@image.dk>
+ -- Added support for changing the region of DVD drives.
+ -- Added sense data to generic command.
+
+ 3.07 Feb 2, 2000 - Jens Axboe <axboe@suse.de>
+ -- Do same "read header length" trick in cdrom_get_disc_info() as
+ we do in cdrom_get_track_info() -- some drive don't obey specs and
+ fail if they can't supply the full Mt Fuji size table.
+ -- Deleted stuff related to setting up write modes. It has a different
+ home now.
+ -- Clear header length in mode_select unconditionally.
+ -- Removed the register_disk() that was added, not needed here.
+
+ 3.08 May 1, 2000 - Jens Axboe <axboe@suse.de>
+ -- Fix direction flag in setup_send_key and setup_report_key. This
+ gave some SCSI adapters problems.
+ -- Always return -EROFS for write opens
+ -- Convert to module_init/module_exit style init and remove some
+ of the #ifdef MODULE stuff
+ -- Fix several dvd errors - DVD_LU_SEND_ASF should pass agid,
+ DVD_HOST_SEND_RPC_STATE did not set buffer size in cdb, and
+ dvd_do_auth passed uninitialized data to drive because init_cdrom_command
+ did not clear a 0 sized buffer.
+
+ 3.09 May 12, 2000 - Jens Axboe <axboe@suse.de>
+ -- Fix Video-CD on SCSI drives that don't support READ_CD command. In
+ that case switch block size and issue plain READ_10 again, then switch
+ back.
+
+ 3.10 Jun 10, 2000 - Jens Axboe <axboe@suse.de>
+ -- Fix volume control on CD's - old SCSI-II drives now use their own
+ code, as doing MODE6 stuff in here is really not my intention.
+ -- Use READ_DISC_INFO for more reliable end-of-disc.
+
+ 3.11 Jun 12, 2000 - Jens Axboe <axboe@suse.de>
+ -- Fix bug in getting rpc phase 2 region info.
+ -- Reinstate "correct" CDROMPLAYTRKIND
+
+ 3.12 Oct 18, 2000 - Jens Axboe <axboe@suse.de>
+ -- Use quiet bit on packet commands not known to work
+
+ 3.20 Dec 17, 2003 - Jens Axboe <axboe@suse.de>
+ -- Various fixes and lots of cleanups not listed :-)
+ -- Locking fixes
+ -- Mt Rainier support
+ -- DVD-RAM write open fixes
+
+ Nov 5 2001, Aug 8 2002. Modified by Andy Polyakov
+ <appro@fy.chalmers.se> to support MMC-3 compliant DVD+RW units.
+
+ Modified by Nigel Kukard <nkukard@lbsd.net> - support DVD+RW
+ 2.4.x patch by Andy Polyakov <appro@fy.chalmers.se>
+
+-------------------------------------------------------------------------*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define REVISION "Revision: 3.20"
+#define VERSION "Id: cdrom.c 3.20 2003/12/17"
+
+/* I use an error-log mask to give fine grain control over the type of
+ messages dumped to the system logs. The available masks include: */
+#define CD_NOTHING 0x0
+#define CD_WARNING 0x1
+#define CD_REG_UNREG 0x2
+#define CD_DO_IOCTL 0x4
+#define CD_OPEN 0x8
+#define CD_CLOSE 0x10
+#define CD_COUNT_TRACKS 0x20
+#define CD_CHANGER 0x40
+#define CD_DVD 0x80
+
+/* Define this to remove _all_ the debugging messages */
+/* #define ERRLOGMASK CD_NOTHING */
+#define ERRLOGMASK CD_WARNING
+/* #define ERRLOGMASK (CD_WARNING|CD_OPEN|CD_COUNT_TRACKS|CD_CLOSE) */
+/* #define ERRLOGMASK (CD_WARNING|CD_REG_UNREG|CD_DO_IOCTL|CD_OPEN|CD_CLOSE|CD_COUNT_TRACKS) */
+
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/cdrom.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/blkpg.h>
+#include <linux/init.h>
+#include <linux/fcntl.h>
+#include <linux/blkdev.h>
+#include <linux/times.h>
+
+#include <asm/uaccess.h>
+
+/* used to tell the module to turn on full debugging messages */
+static bool debug;
+/* default compatibility mode */
+static bool autoclose=1;
+static bool autoeject;
+static bool lockdoor = 1;
+/* will we ever get to use this... sigh. */
+static bool check_media_type;
+/* automatically restart mrw format */
+static bool mrw_format_restart = 1;
+module_param(debug, bool, 0);
+module_param(autoclose, bool, 0);
+module_param(autoeject, bool, 0);
+module_param(lockdoor, bool, 0);
+module_param(check_media_type, bool, 0);
+module_param(mrw_format_restart, bool, 0);
+
+static DEFINE_MUTEX(cdrom_mutex);
+
+static const char *mrw_format_status[] = {
+ "not mrw",
+ "bgformat inactive",
+ "bgformat active",
+ "mrw complete",
+};
+
+static const char *mrw_address_space[] = { "DMA", "GAA" };
+
+#if (ERRLOGMASK != CD_NOTHING)
+#define cd_dbg(type, fmt, ...) \
+do { \
+ if ((ERRLOGMASK & type) || debug == 1) \
+ pr_debug(fmt, ##__VA_ARGS__); \
+} while (0)
+#else
+#define cd_dbg(type, fmt, ...) \
+do { \
+ if (0 && (ERRLOGMASK & type) || debug == 1) \
+ pr_debug(fmt, ##__VA_ARGS__); \
+} while (0)
+#endif
+
+/* The (cdo->capability & ~cdi->mask & CDC_XXX) construct was used in
+ a lot of places. This macro makes the code more clear. */
+#define CDROM_CAN(type) (cdi->ops->capability & ~cdi->mask & (type))
+
+/*
+ * Another popular OS uses 7 seconds as the hard timeout for default
+ * commands, so it is a good choice for us as well.
+ */
+#define CDROM_DEF_TIMEOUT (7 * HZ)
+
+/* Not-exported routines. */
+
+static void cdrom_sysctl_register(void);
+
+static LIST_HEAD(cdrom_list);
+
+static int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
+ struct packet_command *cgc)
+{
+ if (cgc->sense) {
+ cgc->sense->sense_key = 0x05;
+ cgc->sense->asc = 0x20;
+ cgc->sense->ascq = 0x00;
+ }
+
+ cgc->stat = -EIO;
+ return -EIO;
+}
+
+static int cdrom_flush_cache(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_FLUSH_CACHE;
+
+ cgc.timeout = 5 * 60 * HZ;
+
+ return cdi->ops->generic_packet(cdi, &cgc);
+}
+
+/* requires CD R/RW */
+static int cdrom_get_disc_info(struct cdrom_device_info *cdi,
+ disc_information *di)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct packet_command cgc;
+ int ret, buflen;
+
+ /* set up command and get the disc info */
+ init_cdrom_command(&cgc, di, sizeof(*di), CGC_DATA_READ);
+ cgc.cmd[0] = GPCMD_READ_DISC_INFO;
+ cgc.cmd[8] = cgc.buflen = 2;
+ cgc.quiet = 1;
+
+ ret = cdo->generic_packet(cdi, &cgc);
+ if (ret)
+ return ret;
+
+ /* not all drives have the same disc_info length, so requeue
+ * packet with the length the drive tells us it can supply
+ */
+ buflen = be16_to_cpu(di->disc_information_length) +
+ sizeof(di->disc_information_length);
+
+ if (buflen > sizeof(disc_information))
+ buflen = sizeof(disc_information);
+
+ cgc.cmd[8] = cgc.buflen = buflen;
+ ret = cdo->generic_packet(cdi, &cgc);
+ if (ret)
+ return ret;
+
+ /* return actual fill size */
+ return buflen;
+}
+
+/* This macro makes sure we don't have to check on cdrom_device_ops
+ * existence in the run-time routines below. Change_capability is a
+ * hack to have the capability flags defined const, while we can still
+ * change it here without gcc complaining at every line.
+ */
+#define ENSURE(call, bits) \
+do { \
+ if (cdo->call == NULL) \
+ *change_capability &= ~(bits); \
+} while (0)
+
+/*
+ * the first prototypes used 0x2c as the page code for the mrw mode page,
+ * subsequently this was changed to 0x03. probe the one used by this drive
+ */
+static int cdrom_mrw_probe_pc(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+ char buffer[16];
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.timeout = HZ;
+ cgc.quiet = 1;
+
+ if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC, 0)) {
+ cdi->mrw_mode_page = MRW_MODE_PC;
+ return 0;
+ } else if (!cdrom_mode_sense(cdi, &cgc, MRW_MODE_PC_PRE1, 0)) {
+ cdi->mrw_mode_page = MRW_MODE_PC_PRE1;
+ return 0;
+ }
+
+ return 1;
+}
+
+static int cdrom_is_mrw(struct cdrom_device_info *cdi, int *write)
+{
+ struct packet_command cgc;
+ struct mrw_feature_desc *mfd;
+ unsigned char buffer[16];
+ int ret;
+
+ *write = 0;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
+ cgc.cmd[3] = CDF_MRW;
+ cgc.cmd[8] = sizeof(buffer);
+ cgc.quiet = 1;
+
+ if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
+ return ret;
+
+ mfd = (struct mrw_feature_desc *)&buffer[sizeof(struct feature_header)];
+ if (be16_to_cpu(mfd->feature_code) != CDF_MRW)
+ return 1;
+ *write = mfd->write;
+
+ if ((ret = cdrom_mrw_probe_pc(cdi))) {
+ *write = 0;
+ return ret;
+ }
+
+ return 0;
+}
+
+static int cdrom_mrw_bgformat(struct cdrom_device_info *cdi, int cont)
+{
+ struct packet_command cgc;
+ unsigned char buffer[12];
+ int ret;
+
+ pr_info("%sstarting format\n", cont ? "Re" : "");
+
+ /*
+ * FmtData bit set (bit 4), format type is 1
+ */
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_WRITE);
+ cgc.cmd[0] = GPCMD_FORMAT_UNIT;
+ cgc.cmd[1] = (1 << 4) | 1;
+
+ cgc.timeout = 5 * 60 * HZ;
+
+ /*
+ * 4 byte format list header, 8 byte format list descriptor
+ */
+ buffer[1] = 1 << 1;
+ buffer[3] = 8;
+
+ /*
+ * nr_blocks field
+ */
+ buffer[4] = 0xff;
+ buffer[5] = 0xff;
+ buffer[6] = 0xff;
+ buffer[7] = 0xff;
+
+ buffer[8] = 0x24 << 2;
+ buffer[11] = cont;
+
+ ret = cdi->ops->generic_packet(cdi, &cgc);
+ if (ret)
+ pr_info("bgformat failed\n");
+
+ return ret;
+}
+
+static int cdrom_mrw_bgformat_susp(struct cdrom_device_info *cdi, int immed)
+{
+ struct packet_command cgc;
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_CLOSE_TRACK;
+
+ /*
+ * Session = 1, Track = 0
+ */
+ cgc.cmd[1] = !!immed;
+ cgc.cmd[2] = 1 << 1;
+
+ cgc.timeout = 5 * 60 * HZ;
+
+ return cdi->ops->generic_packet(cdi, &cgc);
+}
+
+static int cdrom_mrw_exit(struct cdrom_device_info *cdi)
+{
+ disc_information di;
+ int ret;
+
+ ret = cdrom_get_disc_info(cdi, &di);
+ if (ret < 0 || ret < (int)offsetof(typeof(di),disc_type))
+ return 1;
+
+ ret = 0;
+ if (di.mrw_status == CDM_MRW_BGFORMAT_ACTIVE) {
+ pr_info("issuing MRW background format suspend\n");
+ ret = cdrom_mrw_bgformat_susp(cdi, 0);
+ }
+
+ if (!ret && cdi->media_written)
+ ret = cdrom_flush_cache(cdi);
+
+ return ret;
+}
+
+static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
+{
+ struct packet_command cgc;
+ struct mode_page_header *mph;
+ char buffer[16];
+ int ret, offset, size;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.buffer = buffer;
+ cgc.buflen = sizeof(buffer);
+
+ ret = cdrom_mode_sense(cdi, &cgc, cdi->mrw_mode_page, 0);
+ if (ret)
+ return ret;
+
+ mph = (struct mode_page_header *)buffer;
+ offset = be16_to_cpu(mph->desc_length);
+ size = be16_to_cpu(mph->mode_data_length) + 2;
+
+ buffer[offset + 3] = space;
+ cgc.buflen = size;
+
+ ret = cdrom_mode_select(cdi, &cgc);
+ if (ret)
+ return ret;
+
+ pr_info("%s: mrw address space %s selected\n",
+ cdi->name, mrw_address_space[space]);
+ return 0;
+}
+
+int register_cdrom(struct cdrom_device_info *cdi)
+{
+ static char banner_printed;
+ struct cdrom_device_ops *cdo = cdi->ops;
+ int *change_capability = (int *)&cdo->capability; /* hack */
+
+ cd_dbg(CD_OPEN, "entering register_cdrom\n");
+
+ if (cdo->open == NULL || cdo->release == NULL)
+ return -EINVAL;
+ if (!banner_printed) {
+ pr_info("Uniform CD-ROM driver " REVISION "\n");
+ banner_printed = 1;
+ cdrom_sysctl_register();
+ }
+
+ ENSURE(drive_status, CDC_DRIVE_STATUS);
+ if (cdo->check_events == NULL && cdo->media_changed == NULL)
+ *change_capability = ~(CDC_MEDIA_CHANGED | CDC_SELECT_DISC);
+ ENSURE(tray_move, CDC_CLOSE_TRAY | CDC_OPEN_TRAY);
+ ENSURE(lock_door, CDC_LOCK);
+ ENSURE(select_speed, CDC_SELECT_SPEED);
+ ENSURE(get_last_session, CDC_MULTI_SESSION);
+ ENSURE(get_mcn, CDC_MCN);
+ ENSURE(reset, CDC_RESET);
+ ENSURE(generic_packet, CDC_GENERIC_PACKET);
+ cdi->mc_flags = 0;
+ cdo->n_minors = 0;
+ cdi->options = CDO_USE_FFLAGS;
+
+ if (autoclose == 1 && CDROM_CAN(CDC_CLOSE_TRAY))
+ cdi->options |= (int) CDO_AUTO_CLOSE;
+ if (autoeject == 1 && CDROM_CAN(CDC_OPEN_TRAY))
+ cdi->options |= (int) CDO_AUTO_EJECT;
+ if (lockdoor == 1)
+ cdi->options |= (int) CDO_LOCK;
+ if (check_media_type == 1)
+ cdi->options |= (int) CDO_CHECK_TYPE;
+
+ if (CDROM_CAN(CDC_MRW_W))
+ cdi->exit = cdrom_mrw_exit;
+
+ if (cdi->disk)
+ cdi->cdda_method = CDDA_BPC_FULL;
+ else
+ cdi->cdda_method = CDDA_OLD;
+
+ if (!cdo->generic_packet)
+ cdo->generic_packet = cdrom_dummy_generic_packet;
+
+ cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" registered\n", cdi->name);
+ mutex_lock(&cdrom_mutex);
+ list_add(&cdi->list, &cdrom_list);
+ mutex_unlock(&cdrom_mutex);
+ return 0;
+}
+#undef ENSURE
+
+void unregister_cdrom(struct cdrom_device_info *cdi)
+{
+ cd_dbg(CD_OPEN, "entering unregister_cdrom\n");
+
+ mutex_lock(&cdrom_mutex);
+ list_del(&cdi->list);
+ mutex_unlock(&cdrom_mutex);
+
+ if (cdi->exit)
+ cdi->exit(cdi);
+
+ cdi->ops->n_minors--;
+ cd_dbg(CD_REG_UNREG, "drive \"/dev/%s\" unregistered\n", cdi->name);
+}
+
+int cdrom_get_media_event(struct cdrom_device_info *cdi,
+ struct media_event_desc *med)
+{
+ struct packet_command cgc;
+ unsigned char buffer[8];
+ struct event_header *eh = (struct event_header *)buffer;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+ cgc.cmd[0] = GPCMD_GET_EVENT_STATUS_NOTIFICATION;
+ cgc.cmd[1] = 1; /* IMMED */
+ cgc.cmd[4] = 1 << 4; /* media event */
+ cgc.cmd[8] = sizeof(buffer);
+ cgc.quiet = 1;
+
+ if (cdi->ops->generic_packet(cdi, &cgc))
+ return 1;
+
+ if (be16_to_cpu(eh->data_len) < sizeof(*med))
+ return 1;
+
+ if (eh->nea || eh->notification_class != 0x4)
+ return 1;
+
+ memcpy(med, &buffer[sizeof(*eh)], sizeof(*med));
+ return 0;
+}
+
+static int cdrom_get_random_writable(struct cdrom_device_info *cdi,
+ struct rwrt_feature_desc *rfd)
+{
+ struct packet_command cgc;
+ char buffer[24];
+ int ret;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.cmd[0] = GPCMD_GET_CONFIGURATION; /* often 0x46 */
+ cgc.cmd[3] = CDF_RWRT; /* often 0x0020 */
+ cgc.cmd[8] = sizeof(buffer); /* often 0x18 */
+ cgc.quiet = 1;
+
+ if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
+ return ret;
+
+ memcpy(rfd, &buffer[sizeof(struct feature_header)], sizeof (*rfd));
+ return 0;
+}
+
+static int cdrom_has_defect_mgt(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+ char buffer[16];
+ __be16 *feature_code;
+ int ret;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
+ cgc.cmd[3] = CDF_HWDM;
+ cgc.cmd[8] = sizeof(buffer);
+ cgc.quiet = 1;
+
+ if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
+ return ret;
+
+ feature_code = (__be16 *) &buffer[sizeof(struct feature_header)];
+ if (be16_to_cpu(*feature_code) == CDF_HWDM)
+ return 0;
+
+ return 1;
+}
+
+
+static int cdrom_is_random_writable(struct cdrom_device_info *cdi, int *write)
+{
+ struct rwrt_feature_desc rfd;
+ int ret;
+
+ *write = 0;
+
+ if ((ret = cdrom_get_random_writable(cdi, &rfd)))
+ return ret;
+
+ if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
+ *write = 1;
+
+ return 0;
+}
+
+static int cdrom_media_erasable(struct cdrom_device_info *cdi)
+{
+ disc_information di;
+ int ret;
+
+ ret = cdrom_get_disc_info(cdi, &di);
+ if (ret < 0 || ret < offsetof(typeof(di), n_first_track))
+ return -1;
+
+ return di.erasable;
+}
+
+/*
+ * FIXME: check RO bit
+ */
+static int cdrom_dvdram_open_write(struct cdrom_device_info *cdi)
+{
+ int ret = cdrom_media_erasable(cdi);
+
+ /*
+ * allow writable open if media info read worked and media is
+ * erasable, _or_ if it fails since not all drives support it
+ */
+ if (!ret)
+ return 1;
+
+ return 0;
+}
+
+static int cdrom_mrw_open_write(struct cdrom_device_info *cdi)
+{
+ disc_information di;
+ int ret;
+
+ /*
+ * always reset to DMA lba space on open
+ */
+ if (cdrom_mrw_set_lba_space(cdi, MRW_LBA_DMA)) {
+ pr_err("failed setting lba address space\n");
+ return 1;
+ }
+
+ ret = cdrom_get_disc_info(cdi, &di);
+ if (ret < 0 || ret < offsetof(typeof(di),disc_type))
+ return 1;
+
+ if (!di.erasable)
+ return 1;
+
+ /*
+ * mrw_status
+ * 0 - not MRW formatted
+ * 1 - MRW bgformat started, but not running or complete
+ * 2 - MRW bgformat in progress
+ * 3 - MRW formatting complete
+ */
+ ret = 0;
+ pr_info("open: mrw_status '%s'\n", mrw_format_status[di.mrw_status]);
+ if (!di.mrw_status)
+ ret = 1;
+ else if (di.mrw_status == CDM_MRW_BGFORMAT_INACTIVE &&
+ mrw_format_restart)
+ ret = cdrom_mrw_bgformat(cdi, 1);
+
+ return ret;
+}
+
+static int mo_open_write(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+ char buffer[255];
+ int ret;
+
+ init_cdrom_command(&cgc, &buffer, 4, CGC_DATA_READ);
+ cgc.quiet = 1;
+
+ /*
+ * obtain write protect information as per
+ * drivers/scsi/sd.c:sd_read_write_protect_flag
+ */
+
+ ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
+ if (ret)
+ ret = cdrom_mode_sense(cdi, &cgc, GPMODE_VENDOR_PAGE, 0);
+ if (ret) {
+ cgc.buflen = 255;
+ ret = cdrom_mode_sense(cdi, &cgc, GPMODE_ALL_PAGES, 0);
+ }
+
+ /* drive gave us no info, let the user go ahead */
+ if (ret)
+ return 0;
+
+ return buffer[3] & 0x80;
+}
+
+static int cdrom_ram_open_write(struct cdrom_device_info *cdi)
+{
+ struct rwrt_feature_desc rfd;
+ int ret;
+
+ if ((ret = cdrom_has_defect_mgt(cdi)))
+ return ret;
+
+ if ((ret = cdrom_get_random_writable(cdi, &rfd)))
+ return ret;
+ else if (CDF_RWRT == be16_to_cpu(rfd.feature_code))
+ ret = !rfd.curr;
+
+ cd_dbg(CD_OPEN, "can open for random write\n");
+ return ret;
+}
+
+static void cdrom_mmc3_profile(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+ char buffer[32];
+ int ret, mmc3_profile;
+
+ init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ);
+
+ cgc.cmd[0] = GPCMD_GET_CONFIGURATION;
+ cgc.cmd[1] = 0;
+ cgc.cmd[2] = cgc.cmd[3] = 0; /* Starting Feature Number */
+ cgc.cmd[8] = sizeof(buffer); /* Allocation Length */
+ cgc.quiet = 1;
+
+ if ((ret = cdi->ops->generic_packet(cdi, &cgc)))
+ mmc3_profile = 0xffff;
+ else
+ mmc3_profile = (buffer[6] << 8) | buffer[7];
+
+ cdi->mmc3_profile = mmc3_profile;
+}
+
+static int cdrom_is_dvd_rw(struct cdrom_device_info *cdi)
+{
+ switch (cdi->mmc3_profile) {
+ case 0x12: /* DVD-RAM */
+ case 0x1A: /* DVD+RW */
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+/*
+ * returns 0 for ok to open write, non-0 to disallow
+ */
+static int cdrom_open_write(struct cdrom_device_info *cdi)
+{
+ int mrw, mrw_write, ram_write;
+ int ret = 1;
+
+ mrw = 0;
+ if (!cdrom_is_mrw(cdi, &mrw_write))
+ mrw = 1;
+
+ if (CDROM_CAN(CDC_MO_DRIVE))
+ ram_write = 1;
+ else
+ (void) cdrom_is_random_writable(cdi, &ram_write);
+
+ if (mrw)
+ cdi->mask &= ~CDC_MRW;
+ else
+ cdi->mask |= CDC_MRW;
+
+ if (mrw_write)
+ cdi->mask &= ~CDC_MRW_W;
+ else
+ cdi->mask |= CDC_MRW_W;
+
+ if (ram_write)
+ cdi->mask &= ~CDC_RAM;
+ else
+ cdi->mask |= CDC_RAM;
+
+ if (CDROM_CAN(CDC_MRW_W))
+ ret = cdrom_mrw_open_write(cdi);
+ else if (CDROM_CAN(CDC_DVD_RAM))
+ ret = cdrom_dvdram_open_write(cdi);
+ else if (CDROM_CAN(CDC_RAM) &&
+ !CDROM_CAN(CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_MRW|CDC_MO_DRIVE))
+ ret = cdrom_ram_open_write(cdi);
+ else if (CDROM_CAN(CDC_MO_DRIVE))
+ ret = mo_open_write(cdi);
+ else if (!cdrom_is_dvd_rw(cdi))
+ ret = 0;
+
+ return ret;
+}
+
+static void cdrom_dvd_rw_close_write(struct cdrom_device_info *cdi)
+{
+ struct packet_command cgc;
+
+ if (cdi->mmc3_profile != 0x1a) {
+ cd_dbg(CD_CLOSE, "%s: No DVD+RW\n", cdi->name);
+ return;
+ }
+
+ if (!cdi->media_written) {
+ cd_dbg(CD_CLOSE, "%s: DVD+RW media clean\n", cdi->name);
+ return;
+ }
+
+ pr_info("%s: dirty DVD+RW media, \"finalizing\"\n", cdi->name);
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_FLUSH_CACHE;
+ cgc.timeout = 30*HZ;
+ cdi->ops->generic_packet(cdi, &cgc);
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_CLOSE_TRACK;
+ cgc.timeout = 3000*HZ;
+ cgc.quiet = 1;
+ cdi->ops->generic_packet(cdi, &cgc);
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_CLOSE_TRACK;
+ cgc.cmd[2] = 2; /* Close session */
+ cgc.quiet = 1;
+ cgc.timeout = 3000*HZ;
+ cdi->ops->generic_packet(cdi, &cgc);
+
+ cdi->media_written = 0;
+}
+
+static int cdrom_close_write(struct cdrom_device_info *cdi)
+{
+#if 0
+ return cdrom_flush_cache(cdi);
+#else
+ return 0;
+#endif
+}
+
+/* badly broken, I know. Is due for a fixup anytime. */
+static void cdrom_count_tracks(struct cdrom_device_info *cdi, tracktype *tracks)
+{
+ struct cdrom_tochdr header;
+ struct cdrom_tocentry entry;
+ int ret, i;
+ tracks->data = 0;
+ tracks->audio = 0;
+ tracks->cdi = 0;
+ tracks->xa = 0;
+ tracks->error = 0;
+ cd_dbg(CD_COUNT_TRACKS, "entering cdrom_count_tracks\n");
+ /* Grab the TOC header so we can see how many tracks there are */
+ ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
+ if (ret) {
+ if (ret == -ENOMEDIUM)
+ tracks->error = CDS_NO_DISC;
+ else
+ tracks->error = CDS_NO_INFO;
+ return;
+ }
+ /* check what type of tracks are on this disc */
+ entry.cdte_format = CDROM_MSF;
+ for (i = header.cdth_trk0; i <= header.cdth_trk1; i++) {
+ entry.cdte_track = i;
+ if (cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry)) {
+ tracks->error = CDS_NO_INFO;
+ return;
+ }
+ if (entry.cdte_ctrl & CDROM_DATA_TRACK) {
+ if (entry.cdte_format == 0x10)
+ tracks->cdi++;
+ else if (entry.cdte_format == 0x20)
+ tracks->xa++;
+ else
+ tracks->data++;
+ } else {
+ tracks->audio++;
+ }
+ cd_dbg(CD_COUNT_TRACKS, "track %d: format=%d, ctrl=%d\n",
+ i, entry.cdte_format, entry.cdte_ctrl);
+ }
+ cd_dbg(CD_COUNT_TRACKS, "disc has %d tracks: %d=audio %d=data %d=Cd-I %d=XA\n",
+ header.cdth_trk1, tracks->audio, tracks->data,
+ tracks->cdi, tracks->xa);
+}
+
+static
+int open_for_data(struct cdrom_device_info *cdi)
+{
+ int ret;
+ struct cdrom_device_ops *cdo = cdi->ops;
+ tracktype tracks;
+ cd_dbg(CD_OPEN, "entering open_for_data\n");
+ /* Check if the driver can report drive status. If it can, we
+ can do clever things. If it can't, well, we at least tried! */
+ if (cdo->drive_status != NULL) {
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
+ if (ret == CDS_TRAY_OPEN) {
+ cd_dbg(CD_OPEN, "the tray is open...\n");
+ /* can/may i close it? */
+ if (CDROM_CAN(CDC_CLOSE_TRAY) &&
+ cdi->options & CDO_AUTO_CLOSE) {
+ cd_dbg(CD_OPEN, "trying to close the tray\n");
+ ret=cdo->tray_move(cdi,0);
+ if (ret) {
+ cd_dbg(CD_OPEN, "bummer. tried to close the tray but failed.\n");
+ /* Ignore the error from the low
+ level driver. We don't care why it
+ couldn't close the tray. We only care
+ that there is no disc in the drive,
+ since that is the _REAL_ problem here.*/
+ ret=-ENOMEDIUM;
+ goto clean_up_and_return;
+ }
+ } else {
+ cd_dbg(CD_OPEN, "bummer. this drive can't close the tray.\n");
+ ret=-ENOMEDIUM;
+ goto clean_up_and_return;
+ }
+ /* Ok, the door should be closed now.. Check again */
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
+ cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
+ cd_dbg(CD_OPEN, "tray might not contain a medium\n");
+ ret=-ENOMEDIUM;
+ goto clean_up_and_return;
+ }
+ cd_dbg(CD_OPEN, "the tray is now closed\n");
+ }
+ /* the door should be closed now, check for the disc */
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ if (ret!=CDS_DISC_OK) {
+ ret = -ENOMEDIUM;
+ goto clean_up_and_return;
+ }
+ }
+ cdrom_count_tracks(cdi, &tracks);
+ if (tracks.error == CDS_NO_DISC) {
+ cd_dbg(CD_OPEN, "bummer. no disc.\n");
+ ret=-ENOMEDIUM;
+ goto clean_up_and_return;
+ }
+ /* CD-Players which don't use O_NONBLOCK, workman
+ * for example, need bit CDO_CHECK_TYPE cleared! */
+ if (tracks.data==0) {
+ if (cdi->options & CDO_CHECK_TYPE) {
+ /* give people a warning shot, now that CDO_CHECK_TYPE
+ is the default case! */
+ cd_dbg(CD_OPEN, "bummer. wrong media type.\n");
+ cd_dbg(CD_WARNING, "pid %d must open device O_NONBLOCK!\n",
+ (unsigned int)task_pid_nr(current));
+ ret=-EMEDIUMTYPE;
+ goto clean_up_and_return;
+ }
+ else {
+ cd_dbg(CD_OPEN, "wrong media type, but CDO_CHECK_TYPE not set\n");
+ }
+ }
+
+ cd_dbg(CD_OPEN, "all seems well, opening the devicen");
+
+ /* all seems well, we can open the device */
+ ret = cdo->open(cdi, 0); /* open for data */
+ cd_dbg(CD_OPEN, "opening the device gave me %d\n", ret);
+ /* After all this careful checking, we shouldn't have problems
+ opening the device, but we don't want the device locked if
+ this somehow fails... */
+ if (ret) {
+ cd_dbg(CD_OPEN, "open device failed\n");
+ goto clean_up_and_return;
+ }
+ if (CDROM_CAN(CDC_LOCK) && (cdi->options & CDO_LOCK)) {
+ cdo->lock_door(cdi, 1);
+ cd_dbg(CD_OPEN, "door locked\n");
+ }
+ cd_dbg(CD_OPEN, "device opened successfully\n");
+ return ret;
+
+ /* Something failed. Try to unlock the drive, because some drivers
+ (notably ide-cd) lock the drive after every command. This produced
+ a nasty bug where after mount failed, the drive would remain locked!
+ This ensures that the drive gets unlocked after a mount fails. This
+ is a goto to avoid bloating the driver with redundant code. */
+clean_up_and_return:
+ cd_dbg(CD_OPEN, "open failed\n");
+ if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
+ cdo->lock_door(cdi, 0);
+ cd_dbg(CD_OPEN, "door unlocked\n");
+ }
+ return ret;
+}
+
+/* We use the open-option O_NONBLOCK to indicate that the
+ * purpose of opening is only for subsequent ioctl() calls; no device
+ * integrity checks are performed.
+ *
+ * We hope that all cd-player programs will adopt this convention. It
+ * is in their own interest: device control becomes a lot easier
+ * this way.
+ */
+int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
+ fmode_t mode)
+{
+ int ret;
+
+ cd_dbg(CD_OPEN, "entering cdrom_open\n");
+
+ /* open is event synchronization point, check events first */
+ check_disk_change(bdev);
+
+ /* if this was a O_NONBLOCK open and we should honor the flags,
+ * do a quick open without drive/disc integrity checks. */
+ cdi->use_count++;
+ if ((mode & FMODE_NDELAY) && (cdi->options & CDO_USE_FFLAGS)) {
+ ret = cdi->ops->open(cdi, 1);
+ } else {
+ ret = open_for_data(cdi);
+ if (ret)
+ goto err;
+ cdrom_mmc3_profile(cdi);
+ if (mode & FMODE_WRITE) {
+ ret = -EROFS;
+ if (cdrom_open_write(cdi))
+ goto err_release;
+ if (!CDROM_CAN(CDC_RAM))
+ goto err_release;
+ ret = 0;
+ cdi->media_written = 0;
+ }
+ }
+
+ if (ret)
+ goto err;
+
+ cd_dbg(CD_OPEN, "Use count for \"/dev/%s\" now %d\n",
+ cdi->name, cdi->use_count);
+ return 0;
+err_release:
+ if (CDROM_CAN(CDC_LOCK) && cdi->options & CDO_LOCK) {
+ cdi->ops->lock_door(cdi, 0);
+ cd_dbg(CD_OPEN, "door unlocked\n");
+ }
+ cdi->ops->release(cdi);
+err:
+ cdi->use_count--;
+ return ret;
+}
+
+/* This code is similar to that in open_for_data. The routine is called
+ whenever an audio play operation is requested.
+*/
+static int check_for_audio_disc(struct cdrom_device_info * cdi,
+ struct cdrom_device_ops * cdo)
+{
+ int ret;
+ tracktype tracks;
+ cd_dbg(CD_OPEN, "entering check_for_audio_disc\n");
+ if (!(cdi->options & CDO_CHECK_TYPE))
+ return 0;
+ if (cdo->drive_status != NULL) {
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ cd_dbg(CD_OPEN, "drive_status=%d\n", ret);
+ if (ret == CDS_TRAY_OPEN) {
+ cd_dbg(CD_OPEN, "the tray is open...\n");
+ /* can/may i close it? */
+ if (CDROM_CAN(CDC_CLOSE_TRAY) &&
+ cdi->options & CDO_AUTO_CLOSE) {
+ cd_dbg(CD_OPEN, "trying to close the tray\n");
+ ret=cdo->tray_move(cdi,0);
+ if (ret) {
+ cd_dbg(CD_OPEN, "bummer. tried to close tray but failed.\n");
+ /* Ignore the error from the low
+ level driver. We don't care why it
+ couldn't close the tray. We only care
+ that there is no disc in the drive,
+ since that is the _REAL_ problem here.*/
+ return -ENOMEDIUM;
+ }
+ } else {
+ cd_dbg(CD_OPEN, "bummer. this driver can't close the tray.\n");
+ return -ENOMEDIUM;
+ }
+ /* Ok, the door should be closed now.. Check again */
+ ret = cdo->drive_status(cdi, CDSL_CURRENT);
+ if ((ret == CDS_NO_DISC) || (ret==CDS_TRAY_OPEN)) {
+ cd_dbg(CD_OPEN, "bummer. the tray is still not closed.\n");
+ return -ENOMEDIUM;
+ }
+ if (ret!=CDS_DISC_OK) {
+ cd_dbg(CD_OPEN, "bummer. disc isn't ready.\n");
+ return -EIO;
+ }
+ cd_dbg(CD_OPEN, "the tray is now closed\n");
+ }
+ }
+ cdrom_count_tracks(cdi, &tracks);
+ if (tracks.error)
+ return(tracks.error);
+
+ if (tracks.audio==0)
+ return -EMEDIUMTYPE;
+
+ return 0;
+}
+
+void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ int opened_for_data;
+
+ cd_dbg(CD_CLOSE, "entering cdrom_release\n");
+
+ if (cdi->use_count > 0)
+ cdi->use_count--;
+
+ if (cdi->use_count == 0) {
+ cd_dbg(CD_CLOSE, "Use count for \"/dev/%s\" now zero\n",
+ cdi->name);
+ cdrom_dvd_rw_close_write(cdi);
+
+ if ((cdo->capability & CDC_LOCK) && !cdi->keeplocked) {
+ cd_dbg(CD_CLOSE, "Unlocking door!\n");
+ cdo->lock_door(cdi, 0);
+ }
+ }
+
+ opened_for_data = !(cdi->options & CDO_USE_FFLAGS) ||
+ !(mode & FMODE_NDELAY);
+
+ /*
+ * flush cache on last write release
+ */
+ if (CDROM_CAN(CDC_RAM) && !cdi->use_count && cdi->for_data)
+ cdrom_close_write(cdi);
+
+ cdo->release(cdi);
+ if (cdi->use_count == 0) { /* last process that closes dev*/
+ if (opened_for_data &&
+ cdi->options & CDO_AUTO_EJECT && CDROM_CAN(CDC_OPEN_TRAY))
+ cdo->tray_move(cdi, 1);
+ }
+}
+
+static int cdrom_read_mech_status(struct cdrom_device_info *cdi,
+ struct cdrom_changer_info *buf)
+{
+ struct packet_command cgc;
+ struct cdrom_device_ops *cdo = cdi->ops;
+ int length;
+
+ /*
+ * Sanyo changer isn't spec compliant (doesn't use regular change
+ * LOAD_UNLOAD command, and it doesn't implement the mech status
+ * command below
+ */
+ if (cdi->sanyo_slot) {
+ buf->hdr.nslots = 3;
+ buf->hdr.curslot = cdi->sanyo_slot == 3 ? 0 : cdi->sanyo_slot;
+ for (length = 0; length < 3; length++) {
+ buf->slots[length].disc_present = 1;
+ buf->slots[length].change = 0;
+ }
+ return 0;
+ }
+
+ length = sizeof(struct cdrom_mechstat_header) +
+ cdi->capacity * sizeof(struct cdrom_slot);
+
+ init_cdrom_command(&cgc, buf, length, CGC_DATA_READ);
+ cgc.cmd[0] = GPCMD_MECHANISM_STATUS;
+ cgc.cmd[8] = (length >> 8) & 0xff;
+ cgc.cmd[9] = length & 0xff;
+ return cdo->generic_packet(cdi, &cgc);
+}
+
+static int cdrom_slot_status(struct cdrom_device_info *cdi, int slot)
+{
+ struct cdrom_changer_info *info;
+ int ret;
+
+ cd_dbg(CD_CHANGER, "entering cdrom_slot_status()\n");
+ if (cdi->sanyo_slot)
+ return CDS_NO_INFO;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if ((ret = cdrom_read_mech_status(cdi, info)))
+ goto out_free;
+
+ if (info->slots[slot].disc_present)
+ ret = CDS_DISC_OK;
+ else
+ ret = CDS_NO_DISC;
+
+out_free:
+ kfree(info);
+ return ret;
+}
+
+/* Return the number of slots for an ATAPI/SCSI cdrom,
+ * return 1 if not a changer.
+ */
+int cdrom_number_of_slots(struct cdrom_device_info *cdi)
+{
+ int status;
+ int nslots = 1;
+ struct cdrom_changer_info *info;
+
+ cd_dbg(CD_CHANGER, "entering cdrom_number_of_slots()\n");
+ /* cdrom_read_mech_status requires a valid value for capacity: */
+ cdi->capacity = 0;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if ((status = cdrom_read_mech_status(cdi, info)) == 0)
+ nslots = info->hdr.nslots;
+
+ kfree(info);
+ return nslots;
+}
+
+
+/* If SLOT < 0, unload the current slot. Otherwise, try to load SLOT. */
+static int cdrom_load_unload(struct cdrom_device_info *cdi, int slot)
+{
+ struct packet_command cgc;
+
+ cd_dbg(CD_CHANGER, "entering cdrom_load_unload()\n");
+ if (cdi->sanyo_slot && slot < 0)
+ return 0;
+
+ init_cdrom_command(&cgc, NULL, 0, CGC_DATA_NONE);
+ cgc.cmd[0] = GPCMD_LOAD_UNLOAD;
+ cgc.cmd[4] = 2 + (slot >= 0);
+ cgc.cmd[8] = slot;
+ cgc.timeout = 60 * HZ;
+
+ /* The Sanyo 3 CD changer uses byte 7 of the
+ GPCMD_TEST_UNIT_READY to command to switch CDs instead of
+ using the GPCMD_LOAD_UNLOAD opcode. */
+ if (cdi->sanyo_slot && -1 < slot) {
+ cgc.cmd[0] = GPCMD_TEST_UNIT_READY;
+ cgc.cmd[7] = slot;
+ cgc.cmd[4] = cgc.cmd[8] = 0;
+ cdi->sanyo_slot = slot ? slot : 3;
+ }
+
+ return cdi->ops->generic_packet(cdi, &cgc);
+}
+
+static int cdrom_select_disc(struct cdrom_device_info *cdi, int slot)
+{
+ struct cdrom_changer_info *info;
+ int curslot;
+ int ret;
+
+ cd_dbg(CD_CHANGER, "entering cdrom_select_disc()\n");
+ if (!CDROM_CAN(CDC_SELECT_DISC))
+ return -EDRIVE_CANT_DO_THIS;
+
+ if (cdi->ops->check_events)
+ cdi->ops->check_events(cdi, 0, slot);
+ else
+ cdi->ops->media_changed(cdi, slot);
+
+ if (slot == CDSL_NONE) {
+ /* set media changed bits, on both queues */
+ cdi->mc_flags = 0x3;
+ return cdrom_load_unload(cdi, -1);
+ }
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ if ((ret = cdrom_read_mech_status(cdi, info))) {
+ kfree(info);
+ return ret;
+ }
+
+ curslot = info->hdr.curslot;
+ kfree(info);
+
+ if (cdi->use_count > 1 || cdi->keeplocked) {
+ if (slot == CDSL_CURRENT) {
+ return curslot;
+ } else {
+ return -EBUSY;
+ }
+ }
+
+ /* Specifying CDSL_CURRENT will attempt to load the currnet slot,
+ which is useful if it had been previously unloaded.
+ Whether it can or not, it returns the current slot.
+ Similarly, if slot happens to be the current one, we still
+ try and load it. */
+ if (slot == CDSL_CURRENT)
+ slot = curslot;
+
+ /* set media changed bits on both queues */
+ cdi->mc_flags = 0x3;
+ if ((ret = cdrom_load_unload(cdi, slot)))
+ return ret;
+
+ return slot;
+}
+
+/*
+ * As cdrom implements an extra ioctl consumer for media changed
+ * event, it needs to buffer ->check_events() output, such that event
+ * is not lost for both the usual VFS and ioctl paths.
+ * cdi->{vfs|ioctl}_events are used to buffer pending events for each
+ * path.
+ *
+ * XXX: Locking is non-existent. cdi->ops->check_events() can be
+ * called in parallel and buffering fields are accessed without any
+ * exclusion. The original media_changed code had the same problem.
+ * It might be better to simply deprecate CDROM_MEDIA_CHANGED ioctl
+ * and remove this cruft altogether. It doesn't have much usefulness
+ * at this point.
+ */
+static void cdrom_update_events(struct cdrom_device_info *cdi,
+ unsigned int clearing)
+{
+ unsigned int events;
+
+ events = cdi->ops->check_events(cdi, clearing, CDSL_CURRENT);
+ cdi->vfs_events |= events;
+ cdi->ioctl_events |= events;
+}
+
+unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
+ unsigned int clearing)
+{
+ unsigned int events;
+
+ cdrom_update_events(cdi, clearing);
+ events = cdi->vfs_events;
+ cdi->vfs_events = 0;
+ return events;
+}
+EXPORT_SYMBOL(cdrom_check_events);
+
+/* We want to make media_changed accessible to the user through an
+ * ioctl. The main problem now is that we must double-buffer the
+ * low-level implementation, to assure that the VFS and the user both
+ * see a medium change once.
+ */
+
+static
+int media_changed(struct cdrom_device_info *cdi, int queue)
+{
+ unsigned int mask = (1 << (queue & 1));
+ int ret = !!(cdi->mc_flags & mask);
+ bool changed;
+
+ if (!CDROM_CAN(CDC_MEDIA_CHANGED))
+ return ret;
+
+ /* changed since last call? */
+ if (cdi->ops->check_events) {
+ BUG_ON(!queue); /* shouldn't be called from VFS path */
+ cdrom_update_events(cdi, DISK_EVENT_MEDIA_CHANGE);
+ changed = cdi->ioctl_events & DISK_EVENT_MEDIA_CHANGE;
+ cdi->ioctl_events = 0;
+ } else
+ changed = cdi->ops->media_changed(cdi, CDSL_CURRENT);
+
+ if (changed) {
+ cdi->mc_flags = 0x3; /* set bit on both queues */
+ ret |= 1;
+ cdi->media_written = 0;
+ }
+
+ cdi->mc_flags &= ~mask; /* clear bit */
+ return ret;
+}
+
+int cdrom_media_changed(struct cdrom_device_info *cdi)
+{
+ /* This talks to the VFS, which doesn't like errors - just 1 or 0.
+ * Returning "0" is always safe (media hasn't been changed). Do that
+ * if the low-level cdrom driver dosn't support media changed. */
+ if (cdi == NULL || cdi->ops->media_changed == NULL)
+ return 0;
+ if (!CDROM_CAN(CDC_MEDIA_CHANGED))
+ return 0;
+ return media_changed(cdi, 0);
+}
+
+/* Requests to the low-level drivers will /always/ be done in the
+ following format convention:
+
+ CDROM_LBA: all data-related requests.
+ CDROM_MSF: all audio-related requests.
+
+ However, a low-level implementation is allowed to refuse this
+ request, and return information in its own favorite format.
+
+ It doesn't make sense /at all/ to ask for a play_audio in LBA
+ format, or ask for multi-session info in MSF format. However, for
+ backward compatibility these format requests will be satisfied, but
+ the requests to the low-level drivers will be sanitized in the more
+ meaningful format indicated above.
+ */
+
+static
+void sanitize_format(union cdrom_addr *addr,
+ u_char * curr, u_char requested)
+{
+ if (*curr == requested)
+ return; /* nothing to be done! */
+ if (requested == CDROM_LBA) {
+ addr->lba = (int) addr->msf.frame +
+ 75 * (addr->msf.second - 2 + 60 * addr->msf.minute);
+ } else { /* CDROM_MSF */
+ int lba = addr->lba;
+ addr->msf.frame = lba % 75;
+ lba /= 75;
+ lba += 2;
+ addr->msf.second = lba % 60;
+ addr->msf.minute = lba / 60;
+ }
+ *curr = requested;
+}
+
+void init_cdrom_command(struct packet_command *cgc, void *buf, int len,
+ int type)
+{
+ memset(cgc, 0, sizeof(struct packet_command));
+ if (buf)
+ memset(buf, 0, len);
+ cgc->buffer = (char *) buf;
+ cgc->buflen = len;
+ cgc->data_direction = type;
+ cgc->timeout = CDROM_DEF_TIMEOUT;
+}
+
+/* DVD handling */
+
+#define copy_key(dest,src) memcpy((dest), (src), sizeof(dvd_key))
+#define copy_chal(dest,src) memcpy((dest), (src), sizeof(dvd_challenge))
+
+static void setup_report_key(struct packet_command *cgc, unsigned agid, unsigned type)
+{
+ cgc->cmd[0] = GPCMD_REPORT_KEY;
+ cgc->cmd[10] = type | (agid << 6);
+ switch (type) {
+ case 0: case 8: case 5: {
+ cgc->buflen = 8;
+ break;
+ }
+ case 1: {
+ cgc->buflen = 16;
+ break;
+ }
+ case 2: case 4: {
+ cgc->buflen = 12;
+ break;
+ }
+ }
+ cgc->cmd[9] = cgc->buflen;
+ cgc->data_direction = CGC_DATA_READ;
+}
+
+static void setup_send_key(struct packet_command *cgc, unsigned agid, unsigned type)
+{
+ cgc->cmd[0] = GPCMD_SEND_KEY;
+ cgc->cmd[10] = type | (agid << 6);
+ switch (type) {
+ case 1: {
+ cgc->buflen = 16;
+ break;
+ }
+ case 3: {
+ cgc->buflen = 12;
+ break;
+ }
+ case 6: {
+ cgc->buflen = 8;
+ break;
+ }
+ }
+ cgc->cmd[9] = cgc->buflen;
+ cgc->data_direction = CGC_DATA_WRITE;
+}
+
+static int dvd_do_auth(struct cdrom_device_info *cdi, dvd_authinfo *ai)
+{
+ int ret;
+ u_char buf[20];
+ struct packet_command cgc;
+ struct cdrom_device_ops *cdo = cdi->ops;
+ rpc_state_t rpc_state;
+
+ memset(buf, 0, sizeof(buf));
+ init_cdrom_command(&cgc, buf, 0, CGC_DATA_READ);
+
+ switch (ai->type) {
+ /* LU data send */
+ case DVD_LU_SEND_AGID:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_AGID\n");
+ cgc.quiet = 1;
+ setup_report_key(&cgc, ai->lsa.agid, 0);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ ai->lsa.agid = buf[7] >> 6;
+ /* Returning data, let host change state */
+ break;
+
+ case DVD_LU_SEND_KEY1:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_KEY1\n");
+ setup_report_key(&cgc, ai->lsk.agid, 2);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ copy_key(ai->lsk.key, &buf[4]);
+ /* Returning data, let host change state */
+ break;
+
+ case DVD_LU_SEND_CHALLENGE:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_CHALLENGE\n");
+ setup_report_key(&cgc, ai->lsc.agid, 1);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ copy_chal(ai->lsc.chal, &buf[4]);
+ /* Returning data, let host change state */
+ break;
+
+ /* Post-auth key */
+ case DVD_LU_SEND_TITLE_KEY:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_TITLE_KEY\n");
+ cgc.quiet = 1;
+ setup_report_key(&cgc, ai->lstk.agid, 4);
+ cgc.cmd[5] = ai->lstk.lba;
+ cgc.cmd[4] = ai->lstk.lba >> 8;
+ cgc.cmd[3] = ai->lstk.lba >> 16;
+ cgc.cmd[2] = ai->lstk.lba >> 24;
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ ai->lstk.cpm = (buf[4] >> 7) & 1;
+ ai->lstk.cp_sec = (buf[4] >> 6) & 1;
+ ai->lstk.cgms = (buf[4] >> 4) & 3;
+ copy_key(ai->lstk.title_key, &buf[5]);
+ /* Returning data, let host change state */
+ break;
+
+ case DVD_LU_SEND_ASF:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_ASF\n");
+ setup_report_key(&cgc, ai->lsasf.agid, 5);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ ai->lsasf.asf = buf[7] & 1;
+ break;
+
+ /* LU data receive (LU changes state) */
+ case DVD_HOST_SEND_CHALLENGE:
+ cd_dbg(CD_DVD, "entering DVD_HOST_SEND_CHALLENGE\n");
+ setup_send_key(&cgc, ai->hsc.agid, 1);
+ buf[1] = 0xe;
+ copy_chal(&buf[4], ai->hsc.chal);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ ai->type = DVD_LU_SEND_KEY1;
+ break;
+
+ case DVD_HOST_SEND_KEY2:
+ cd_dbg(CD_DVD, "entering DVD_HOST_SEND_KEY2\n");
+ setup_send_key(&cgc, ai->hsk.agid, 3);
+ buf[1] = 0xa;
+ copy_key(&buf[4], ai->hsk.key);
+
+ if ((ret = cdo->generic_packet(cdi, &cgc))) {
+ ai->type = DVD_AUTH_FAILURE;
+ return ret;
+ }
+ ai->type = DVD_AUTH_ESTABLISHED;
+ break;
+
+ /* Misc */
+ case DVD_INVALIDATE_AGID:
+ cgc.quiet = 1;
+ cd_dbg(CD_DVD, "entering DVD_INVALIDATE_AGID\n");
+ setup_report_key(&cgc, ai->lsa.agid, 0x3f);
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+ break;
+
+ /* Get region settings */
+ case DVD_LU_SEND_RPC_STATE:
+ cd_dbg(CD_DVD, "entering DVD_LU_SEND_RPC_STATE\n");
+ setup_report_key(&cgc, 0, 8);
+ memset(&rpc_state, 0, sizeof(rpc_state_t));
+ cgc.buffer = (char *) &rpc_state;
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ ai->lrpcs.type = rpc_state.type_code;
+ ai->lrpcs.vra = rpc_state.vra;
+ ai->lrpcs.ucca = rpc_state.ucca;
+ ai->lrpcs.region_mask = rpc_state.region_mask;
+ ai->lrpcs.rpc_scheme = rpc_state.rpc_scheme;
+ break;
+
+ /* Set region settings */
+ case DVD_HOST_SEND_RPC_STATE:
+ cd_dbg(CD_DVD, "entering DVD_HOST_SEND_RPC_STATE\n");
+ setup_send_key(&cgc, 0, 6);
+ buf[1] = 6;
+ buf[4] = ai->hrpcs.pdrc;
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+ break;
+
+ default:
+ cd_dbg(CD_WARNING, "Invalid DVD key ioctl (%d)\n", ai->type);
+ return -ENOTTY;
+ }
+
+ return 0;
+}
+
+static int dvd_read_physical(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ unsigned char buf[21], *base;
+ struct dvd_layer *layer;
+ struct cdrom_device_ops *cdo = cdi->ops;
+ int ret, layer_num = s->physical.layer_num;
+
+ if (layer_num >= DVD_LAYERS)
+ return -EINVAL;
+
+ init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
+ cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
+ cgc->cmd[6] = layer_num;
+ cgc->cmd[7] = s->type;
+ cgc->cmd[9] = cgc->buflen & 0xff;
+
+ /*
+ * refrain from reporting errors on non-existing layers (mainly)
+ */
+ cgc->quiet = 1;
+
+ ret = cdo->generic_packet(cdi, cgc);
+ if (ret)
+ return ret;
+
+ base = &buf[4];
+ layer = &s->physical.layer[layer_num];
+
+ /*
+ * place the data... really ugly, but at least we won't have to
+ * worry about endianess in userspace.
+ */
+ memset(layer, 0, sizeof(*layer));
+ layer->book_version = base[0] & 0xf;
+ layer->book_type = base[0] >> 4;
+ layer->min_rate = base[1] & 0xf;
+ layer->disc_size = base[1] >> 4;
+ layer->layer_type = base[2] & 0xf;
+ layer->track_path = (base[2] >> 4) & 1;
+ layer->nlayers = (base[2] >> 5) & 3;
+ layer->track_density = base[3] & 0xf;
+ layer->linear_density = base[3] >> 4;
+ layer->start_sector = base[5] << 16 | base[6] << 8 | base[7];
+ layer->end_sector = base[9] << 16 | base[10] << 8 | base[11];
+ layer->end_sector_l0 = base[13] << 16 | base[14] << 8 | base[15];
+ layer->bca = base[16] >> 7;
+
+ return 0;
+}
+
+static int dvd_read_copyright(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ int ret;
+ u_char buf[8];
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ init_cdrom_command(cgc, buf, sizeof(buf), CGC_DATA_READ);
+ cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
+ cgc->cmd[6] = s->copyright.layer_num;
+ cgc->cmd[7] = s->type;
+ cgc->cmd[8] = cgc->buflen >> 8;
+ cgc->cmd[9] = cgc->buflen & 0xff;
+
+ ret = cdo->generic_packet(cdi, cgc);
+ if (ret)
+ return ret;
+
+ s->copyright.cpst = buf[4];
+ s->copyright.rmi = buf[5];
+
+ return 0;
+}
+
+static int dvd_read_disckey(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ int ret, size;
+ u_char *buf;
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ size = sizeof(s->disckey.value) + 4;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
+ cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
+ cgc->cmd[7] = s->type;
+ cgc->cmd[8] = size >> 8;
+ cgc->cmd[9] = size & 0xff;
+ cgc->cmd[10] = s->disckey.agid << 6;
+
+ ret = cdo->generic_packet(cdi, cgc);
+ if (!ret)
+ memcpy(s->disckey.value, &buf[4], sizeof(s->disckey.value));
+
+ kfree(buf);
+ return ret;
+}
+
+static int dvd_read_bca(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ int ret, size = 4 + 188;
+ u_char *buf;
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
+ cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
+ cgc->cmd[7] = s->type;
+ cgc->cmd[9] = cgc->buflen & 0xff;
+
+ ret = cdo->generic_packet(cdi, cgc);
+ if (ret)
+ goto out;
+
+ s->bca.len = buf[0] << 8 | buf[1];
+ if (s->bca.len < 12 || s->bca.len > 188) {
+ cd_dbg(CD_WARNING, "Received invalid BCA length (%d)\n",
+ s->bca.len);
+ ret = -EIO;
+ goto out;
+ }
+ memcpy(s->bca.value, &buf[4], s->bca.len);
+ ret = 0;
+out:
+ kfree(buf);
+ return ret;
+}
+
+static int dvd_read_manufact(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ int ret = 0, size;
+ u_char *buf;
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ size = sizeof(s->manufact.value) + 4;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ init_cdrom_command(cgc, buf, size, CGC_DATA_READ);
+ cgc->cmd[0] = GPCMD_READ_DVD_STRUCTURE;
+ cgc->cmd[7] = s->type;
+ cgc->cmd[8] = size >> 8;
+ cgc->cmd[9] = size & 0xff;
+
+ ret = cdo->generic_packet(cdi, cgc);
+ if (ret)
+ goto out;
+
+ s->manufact.len = buf[0] << 8 | buf[1];
+ if (s->manufact.len < 0) {
+ cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d)\n",
+ s->manufact.len);
+ ret = -EIO;
+ } else {
+ if (s->manufact.len > 2048) {
+ cd_dbg(CD_WARNING, "Received invalid manufacture info length (%d): truncating to 2048\n",
+ s->manufact.len);
+ s->manufact.len = 2048;
+ }
+ memcpy(s->manufact.value, &buf[4], s->manufact.len);
+ }
+
+out:
+ kfree(buf);
+ return ret;
+}
+
+static int dvd_read_struct(struct cdrom_device_info *cdi, dvd_struct *s,
+ struct packet_command *cgc)
+{
+ switch (s->type) {
+ case DVD_STRUCT_PHYSICAL:
+ return dvd_read_physical(cdi, s, cgc);
+
+ case DVD_STRUCT_COPYRIGHT:
+ return dvd_read_copyright(cdi, s, cgc);
+
+ case DVD_STRUCT_DISCKEY:
+ return dvd_read_disckey(cdi, s, cgc);
+
+ case DVD_STRUCT_BCA:
+ return dvd_read_bca(cdi, s, cgc);
+
+ case DVD_STRUCT_MANUFACT:
+ return dvd_read_manufact(cdi, s, cgc);
+
+ default:
+ cd_dbg(CD_WARNING, ": Invalid DVD structure read requested (%d)\n",
+ s->type);
+ return -EINVAL;
+ }
+}
+
+int cdrom_mode_sense(struct cdrom_device_info *cdi,
+ struct packet_command *cgc,
+ int page_code, int page_control)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ memset(cgc->cmd, 0, sizeof(cgc->cmd));
+
+ cgc->cmd[0] = GPCMD_MODE_SENSE_10;
+ cgc->cmd[2] = page_code | (page_control << 6);
+ cgc->cmd[7] = cgc->buflen >> 8;
+ cgc->cmd[8] = cgc->buflen & 0xff;
+ cgc->data_direction = CGC_DATA_READ;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+int cdrom_mode_select(struct cdrom_device_info *cdi,
+ struct packet_command *cgc)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ memset(cgc->cmd, 0, sizeof(cgc->cmd));
+ memset(cgc->buffer, 0, 2);
+ cgc->cmd[0] = GPCMD_MODE_SELECT_10;
+ cgc->cmd[1] = 0x10; /* PF */
+ cgc->cmd[7] = cgc->buflen >> 8;
+ cgc->cmd[8] = cgc->buflen & 0xff;
+ cgc->data_direction = CGC_DATA_WRITE;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static int cdrom_read_subchannel(struct cdrom_device_info *cdi,
+ struct cdrom_subchnl *subchnl, int mcn)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct packet_command cgc;
+ char buffer[32];
+ int ret;
+
+ init_cdrom_command(&cgc, buffer, 16, CGC_DATA_READ);
+ cgc.cmd[0] = GPCMD_READ_SUBCHANNEL;
+ cgc.cmd[1] = 2; /* MSF addressing */
+ cgc.cmd[2] = 0x40; /* request subQ data */
+ cgc.cmd[3] = mcn ? 2 : 1;
+ cgc.cmd[8] = 16;
+
+ if ((ret = cdo->generic_packet(cdi, &cgc)))
+ return ret;
+
+ subchnl->cdsc_audiostatus = cgc.buffer[1];
+ subchnl->cdsc_format = CDROM_MSF;
+ subchnl->cdsc_ctrl = cgc.buffer[5] & 0xf;
+ subchnl->cdsc_trk = cgc.buffer[6];
+ subchnl->cdsc_ind = cgc.buffer[7];
+
+ subchnl->cdsc_reladdr.msf.minute = cgc.buffer[13];
+ subchnl->cdsc_reladdr.msf.second = cgc.buffer[14];
+ subchnl->cdsc_reladdr.msf.frame = cgc.buffer[15];
+ subchnl->cdsc_absaddr.msf.minute = cgc.buffer[9];
+ subchnl->cdsc_absaddr.msf.second = cgc.buffer[10];
+ subchnl->cdsc_absaddr.msf.frame = cgc.buffer[11];
+
+ return 0;
+}
+
+/*
+ * Specific READ_10 interface
+ */
+static int cdrom_read_cd(struct cdrom_device_info *cdi,
+ struct packet_command *cgc, int lba,
+ int blocksize, int nblocks)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ memset(&cgc->cmd, 0, sizeof(cgc->cmd));
+ cgc->cmd[0] = GPCMD_READ_10;
+ cgc->cmd[2] = (lba >> 24) & 0xff;
+ cgc->cmd[3] = (lba >> 16) & 0xff;
+ cgc->cmd[4] = (lba >> 8) & 0xff;
+ cgc->cmd[5] = lba & 0xff;
+ cgc->cmd[6] = (nblocks >> 16) & 0xff;
+ cgc->cmd[7] = (nblocks >> 8) & 0xff;
+ cgc->cmd[8] = nblocks & 0xff;
+ cgc->buflen = blocksize * nblocks;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+/* very generic interface for reading the various types of blocks */
+static int cdrom_read_block(struct cdrom_device_info *cdi,
+ struct packet_command *cgc,
+ int lba, int nblocks, int format, int blksize)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+
+ memset(&cgc->cmd, 0, sizeof(cgc->cmd));
+ cgc->cmd[0] = GPCMD_READ_CD;
+ /* expected sector size - cdda,mode1,etc. */
+ cgc->cmd[1] = format << 2;
+ /* starting address */
+ cgc->cmd[2] = (lba >> 24) & 0xff;
+ cgc->cmd[3] = (lba >> 16) & 0xff;
+ cgc->cmd[4] = (lba >> 8) & 0xff;
+ cgc->cmd[5] = lba & 0xff;
+ /* number of blocks */
+ cgc->cmd[6] = (nblocks >> 16) & 0xff;
+ cgc->cmd[7] = (nblocks >> 8) & 0xff;
+ cgc->cmd[8] = nblocks & 0xff;
+ cgc->buflen = blksize * nblocks;
+
+ /* set the header info returned */
+ switch (blksize) {
+ case CD_FRAMESIZE_RAW0 : cgc->cmd[9] = 0x58; break;
+ case CD_FRAMESIZE_RAW1 : cgc->cmd[9] = 0x78; break;
+ case CD_FRAMESIZE_RAW : cgc->cmd[9] = 0xf8; break;
+ default : cgc->cmd[9] = 0x10;
+ }
+
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static int cdrom_read_cdda_old(struct cdrom_device_info *cdi, __u8 __user *ubuf,
+ int lba, int nframes)
+{
+ struct packet_command cgc;
+ int ret = 0;
+ int nr;
+
+ cdi->last_sense = 0;
+
+ memset(&cgc, 0, sizeof(cgc));
+
+ /*
+ * start with will ra.nframes size, back down if alloc fails
+ */
+ nr = nframes;
+ do {
+ cgc.buffer = kmalloc(CD_FRAMESIZE_RAW * nr, GFP_KERNEL);
+ if (cgc.buffer)
+ break;
+
+ nr >>= 1;
+ } while (nr);
+
+ if (!nr)
+ return -ENOMEM;
+
+ cgc.data_direction = CGC_DATA_READ;
+ while (nframes > 0) {
+ if (nr > nframes)
+ nr = nframes;
+
+ ret = cdrom_read_block(cdi, &cgc, lba, nr, 1, CD_FRAMESIZE_RAW);
+ if (ret)
+ break;
+ if (copy_to_user(ubuf, cgc.buffer, CD_FRAMESIZE_RAW * nr)) {
+ ret = -EFAULT;
+ break;
+ }
+ ubuf += CD_FRAMESIZE_RAW * nr;
+ nframes -= nr;
+ lba += nr;
+ }
+ kfree(cgc.buffer);
+ return ret;
+}
+
+static int cdrom_read_cdda_bpc(struct cdrom_device_info *cdi, __u8 __user *ubuf,
+ int lba, int nframes)
+{
+ struct request_queue *q = cdi->disk->queue;
+ struct request *rq;
+ struct bio *bio;
+ unsigned int len;
+ int nr, ret = 0;
+
+ if (!q)
+ return -ENXIO;
+
+ cdi->last_sense = 0;
+
+ while (nframes) {
+ nr = nframes;
+ if (cdi->cdda_method == CDDA_BPC_SINGLE)
+ nr = 1;
+ if (nr * CD_FRAMESIZE_RAW > (queue_max_sectors(q) << 9))
+ nr = (queue_max_sectors(q) << 9) / CD_FRAMESIZE_RAW;
+
+ len = nr * CD_FRAMESIZE_RAW;
+
+ rq = blk_get_request(q, READ, GFP_KERNEL);
+ if (IS_ERR(rq)) {
+ ret = PTR_ERR(rq);
+ break;
+ }
+ blk_rq_set_block_pc(rq);
+
+ ret = blk_rq_map_user(q, rq, NULL, ubuf, len, GFP_KERNEL);
+ if (ret) {
+ blk_put_request(rq);
+ break;
+ }
+
+ rq->cmd[0] = GPCMD_READ_CD;
+ rq->cmd[1] = 1 << 2;
+ rq->cmd[2] = (lba >> 24) & 0xff;
+ rq->cmd[3] = (lba >> 16) & 0xff;
+ rq->cmd[4] = (lba >> 8) & 0xff;
+ rq->cmd[5] = lba & 0xff;
+ rq->cmd[6] = (nr >> 16) & 0xff;
+ rq->cmd[7] = (nr >> 8) & 0xff;
+ rq->cmd[8] = nr & 0xff;
+ rq->cmd[9] = 0xf8;
+
+ rq->cmd_len = 12;
+ rq->timeout = 60 * HZ;
+ bio = rq->bio;
+
+ if (blk_execute_rq(q, cdi->disk, rq, 0)) {
+ struct request_sense *s = rq->sense;
+ ret = -EIO;
+ cdi->last_sense = s->sense_key;
+ }
+
+ if (blk_rq_unmap_user(bio))
+ ret = -EFAULT;
+ blk_put_request(rq);
+
+ if (ret)
+ break;
+
+ nframes -= nr;
+ lba += nr;
+ ubuf += len;
+ }
+
+ return ret;
+}
+
+static int cdrom_read_cdda(struct cdrom_device_info *cdi, __u8 __user *ubuf,
+ int lba, int nframes)
+{
+ int ret;
+
+ if (cdi->cdda_method == CDDA_OLD)
+ return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
+
+retry:
+ /*
+ * for anything else than success and io error, we need to retry
+ */
+ ret = cdrom_read_cdda_bpc(cdi, ubuf, lba, nframes);
+ if (!ret || ret != -EIO)
+ return ret;
+
+ /*
+ * I've seen drives get sense 4/8/3 udma crc errors on multi
+ * frame dma, so drop to single frame dma if we need to
+ */
+ if (cdi->cdda_method == CDDA_BPC_FULL && nframes > 1) {
+ pr_info("dropping to single frame dma\n");
+ cdi->cdda_method = CDDA_BPC_SINGLE;
+ goto retry;
+ }
+
+ /*
+ * so we have an io error of some sort with multi frame dma. if the
+ * condition wasn't a hardware error
+ * problems, not for any error
+ */
+ if (cdi->last_sense != 0x04 && cdi->last_sense != 0x0b)
+ return ret;
+
+ pr_info("dropping to old style cdda (sense=%x)\n", cdi->last_sense);
+ cdi->cdda_method = CDDA_OLD;
+ return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
+}
+
+static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_multisession ms_info;
+ u8 requested_format;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
+
+ if (!(cdi->ops->capability & CDC_MULTI_SESSION))
+ return -ENOSYS;
+
+ if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
+ return -EFAULT;
+
+ requested_format = ms_info.addr_format;
+ if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
+ return -EINVAL;
+ ms_info.addr_format = CDROM_LBA;
+
+ ret = cdi->ops->get_last_session(cdi, &ms_info);
+ if (ret)
+ return ret;
+
+ sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
+
+ if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
+ return -EFAULT;
+
+ cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
+ return 0;
+}
+
+static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT\n");
+
+ if (!CDROM_CAN(CDC_OPEN_TRAY))
+ return -ENOSYS;
+ if (cdi->use_count != 1 || cdi->keeplocked)
+ return -EBUSY;
+ if (CDROM_CAN(CDC_LOCK)) {
+ int ret = cdi->ops->lock_door(cdi, 0);
+ if (ret)
+ return ret;
+ }
+
+ return cdi->ops->tray_move(cdi, 1);
+}
+
+static int cdrom_ioctl_closetray(struct cdrom_device_info *cdi)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROMCLOSETRAY\n");
+
+ if (!CDROM_CAN(CDC_CLOSE_TRAY))
+ return -ENOSYS;
+ return cdi->ops->tray_move(cdi, 0);
+}
+
+static int cdrom_ioctl_eject_sw(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROMEJECT_SW\n");
+
+ if (!CDROM_CAN(CDC_OPEN_TRAY))
+ return -ENOSYS;
+ if (cdi->keeplocked)
+ return -EBUSY;
+
+ cdi->options &= ~(CDO_AUTO_CLOSE | CDO_AUTO_EJECT);
+ if (arg)
+ cdi->options |= CDO_AUTO_CLOSE | CDO_AUTO_EJECT;
+ return 0;
+}
+
+static int cdrom_ioctl_media_changed(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ struct cdrom_changer_info *info;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_MEDIA_CHANGED\n");
+
+ if (!CDROM_CAN(CDC_MEDIA_CHANGED))
+ return -ENOSYS;
+
+ /* cannot select disc or select current disc */
+ if (!CDROM_CAN(CDC_SELECT_DISC) || arg == CDSL_CURRENT)
+ return media_changed(cdi, 1);
+
+ if ((unsigned int)arg >= cdi->capacity)
+ return -EINVAL;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ ret = cdrom_read_mech_status(cdi, info);
+ if (!ret)
+ ret = info->slots[arg].change;
+ kfree(info);
+ return ret;
+}
+
+static int cdrom_ioctl_set_options(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_SET_OPTIONS\n");
+
+ /*
+ * Options need to be in sync with capability.
+ * Too late for that, so we have to check each one separately.
+ */
+ switch (arg) {
+ case CDO_USE_FFLAGS:
+ case CDO_CHECK_TYPE:
+ break;
+ case CDO_LOCK:
+ if (!CDROM_CAN(CDC_LOCK))
+ return -ENOSYS;
+ break;
+ case 0:
+ return cdi->options;
+ /* default is basically CDO_[AUTO_CLOSE|AUTO_EJECT] */
+ default:
+ if (!CDROM_CAN(arg))
+ return -ENOSYS;
+ }
+ cdi->options |= (int) arg;
+ return cdi->options;
+}
+
+static int cdrom_ioctl_clear_options(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_CLEAR_OPTIONS\n");
+
+ cdi->options &= ~(int) arg;
+ return cdi->options;
+}
+
+static int cdrom_ioctl_select_speed(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_SPEED\n");
+
+ if (!CDROM_CAN(CDC_SELECT_SPEED))
+ return -ENOSYS;
+ return cdi->ops->select_speed(cdi, arg);
+}
+
+static int cdrom_ioctl_select_disc(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_SELECT_DISC\n");
+
+ if (!CDROM_CAN(CDC_SELECT_DISC))
+ return -ENOSYS;
+
+ if (arg != CDSL_CURRENT && arg != CDSL_NONE) {
+ if ((int)arg >= cdi->capacity)
+ return -EINVAL;
+ }
+
+ /*
+ * ->select_disc is a hook to allow a driver-specific way of
+ * seleting disc. However, since there is no equivalent hook for
+ * cdrom_slot_status this may not actually be useful...
+ */
+ if (cdi->ops->select_disc)
+ return cdi->ops->select_disc(cdi, arg);
+
+ cd_dbg(CD_CHANGER, "Using generic cdrom_select_disc()\n");
+ return cdrom_select_disc(cdi, arg);
+}
+
+static int cdrom_ioctl_reset(struct cdrom_device_info *cdi,
+ struct block_device *bdev)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_RESET\n");
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ if (!CDROM_CAN(CDC_RESET))
+ return -ENOSYS;
+ invalidate_bdev(bdev);
+ return cdi->ops->reset(cdi);
+}
+
+static int cdrom_ioctl_lock_door(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "%socking door\n", arg ? "L" : "Unl");
+
+ if (!CDROM_CAN(CDC_LOCK))
+ return -EDRIVE_CANT_DO_THIS;
+
+ cdi->keeplocked = arg ? 1 : 0;
+
+ /*
+ * Don't unlock the door on multiple opens by default, but allow
+ * root to do so.
+ */
+ if (cdi->use_count != 1 && !arg && !capable(CAP_SYS_ADMIN))
+ return -EBUSY;
+ return cdi->ops->lock_door(cdi, arg);
+}
+
+static int cdrom_ioctl_debug(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "%sabling debug\n", arg ? "En" : "Dis");
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+ debug = arg ? 1 : 0;
+ return debug;
+}
+
+static int cdrom_ioctl_get_capability(struct cdrom_device_info *cdi)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_CAPABILITY\n");
+ return (cdi->ops->capability & ~cdi->mask);
+}
+
+/*
+ * The following function is implemented, although very few audio
+ * discs give Universal Product Code information, which should just be
+ * the Medium Catalog Number on the box. Note, that the way the code
+ * is written on the CD is /not/ uniform across all discs!
+ */
+static int cdrom_ioctl_get_mcn(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_mcn mcn;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_GET_MCN\n");
+
+ if (!(cdi->ops->capability & CDC_MCN))
+ return -ENOSYS;
+ ret = cdi->ops->get_mcn(cdi, &mcn);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(argp, &mcn, sizeof(mcn)))
+ return -EFAULT;
+ cd_dbg(CD_DO_IOCTL, "CDROM_GET_MCN successful\n");
+ return 0;
+}
+
+static int cdrom_ioctl_drive_status(struct cdrom_device_info *cdi,
+ unsigned long arg)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_DRIVE_STATUS\n");
+
+ if (!(cdi->ops->capability & CDC_DRIVE_STATUS))
+ return -ENOSYS;
+ if (!CDROM_CAN(CDC_SELECT_DISC) ||
+ (arg == CDSL_CURRENT || arg == CDSL_NONE))
+ return cdi->ops->drive_status(cdi, CDSL_CURRENT);
+ if (((int)arg >= cdi->capacity))
+ return -EINVAL;
+ return cdrom_slot_status(cdi, arg);
+}
+
+/*
+ * Ok, this is where problems start. The current interface for the
+ * CDROM_DISC_STATUS ioctl is flawed. It makes the false assumption that
+ * CDs are all CDS_DATA_1 or all CDS_AUDIO, etc. Unfortunately, while this
+ * is often the case, it is also very common for CDs to have some tracks
+ * with data, and some tracks with audio. Just because I feel like it,
+ * I declare the following to be the best way to cope. If the CD has ANY
+ * data tracks on it, it will be returned as a data CD. If it has any XA
+ * tracks, I will return it as that. Now I could simplify this interface
+ * by combining these returns with the above, but this more clearly
+ * demonstrates the problem with the current interface. Too bad this
+ * wasn't designed to use bitmasks... -Erik
+ *
+ * Well, now we have the option CDS_MIXED: a mixed-type CD.
+ * User level programmers might feel the ioctl is not very useful.
+ * ---david
+ */
+static int cdrom_ioctl_disc_status(struct cdrom_device_info *cdi)
+{
+ tracktype tracks;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_DISC_STATUS\n");
+
+ cdrom_count_tracks(cdi, &tracks);
+ if (tracks.error)
+ return tracks.error;
+
+ /* Policy mode on */
+ if (tracks.audio > 0) {
+ if (!tracks.data && !tracks.cdi && !tracks.xa)
+ return CDS_AUDIO;
+ else
+ return CDS_MIXED;
+ }
+
+ if (tracks.cdi > 0)
+ return CDS_XA_2_2;
+ if (tracks.xa > 0)
+ return CDS_XA_2_1;
+ if (tracks.data > 0)
+ return CDS_DATA_1;
+ /* Policy mode off */
+
+ cd_dbg(CD_WARNING, "This disc doesn't have any tracks I recognize!\n");
+ return CDS_NO_INFO;
+}
+
+static int cdrom_ioctl_changer_nslots(struct cdrom_device_info *cdi)
+{
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_CHANGER_NSLOTS\n");
+ return cdi->capacity;
+}
+
+static int cdrom_ioctl_get_subchnl(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_subchnl q;
+ u8 requested, back;
+ int ret;
+
+ /* cd_dbg(CD_DO_IOCTL,"entering CDROMSUBCHNL\n");*/
+
+ if (copy_from_user(&q, argp, sizeof(q)))
+ return -EFAULT;
+
+ requested = q.cdsc_format;
+ if (requested != CDROM_MSF && requested != CDROM_LBA)
+ return -EINVAL;
+ q.cdsc_format = CDROM_MSF;
+
+ ret = cdi->ops->audio_ioctl(cdi, CDROMSUBCHNL, &q);
+ if (ret)
+ return ret;
+
+ back = q.cdsc_format; /* local copy */
+ sanitize_format(&q.cdsc_absaddr, &back, requested);
+ sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
+
+ if (copy_to_user(argp, &q, sizeof(q)))
+ return -EFAULT;
+ /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
+ return 0;
+}
+
+static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_tochdr header;
+ int ret;
+
+ /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCHDR\n"); */
+
+ if (copy_from_user(&header, argp, sizeof(header)))
+ return -EFAULT;
+
+ ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCHDR, &header);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(argp, &header, sizeof(header)))
+ return -EFAULT;
+ /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCHDR successful\n"); */
+ return 0;
+}
+
+static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_tocentry entry;
+ u8 requested_format;
+ int ret;
+
+ /* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
+
+ if (copy_from_user(&entry, argp, sizeof(entry)))
+ return -EFAULT;
+
+ requested_format = entry.cdte_format;
+ if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
+ return -EINVAL;
+ /* make interface to low-level uniform */
+ entry.cdte_format = CDROM_MSF;
+ ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
+ if (ret)
+ return ret;
+ sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
+
+ if (copy_to_user(argp, &entry, sizeof(entry)))
+ return -EFAULT;
+ /* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
+ return 0;
+}
+
+static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_msf msf;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
+
+ if (!CDROM_CAN(CDC_PLAY_AUDIO))
+ return -ENOSYS;
+ if (copy_from_user(&msf, argp, sizeof(msf)))
+ return -EFAULT;
+ return cdi->ops->audio_ioctl(cdi, CDROMPLAYMSF, &msf);
+}
+
+static int cdrom_ioctl_play_trkind(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_ti ti;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYTRKIND\n");
+
+ if (!CDROM_CAN(CDC_PLAY_AUDIO))
+ return -ENOSYS;
+ if (copy_from_user(&ti, argp, sizeof(ti)))
+ return -EFAULT;
+
+ ret = check_for_audio_disc(cdi, cdi->ops);
+ if (ret)
+ return ret;
+ return cdi->ops->audio_ioctl(cdi, CDROMPLAYTRKIND, &ti);
+}
+static int cdrom_ioctl_volctrl(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_volctrl volume;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMVOLCTRL\n");
+
+ if (!CDROM_CAN(CDC_PLAY_AUDIO))
+ return -ENOSYS;
+ if (copy_from_user(&volume, argp, sizeof(volume)))
+ return -EFAULT;
+ return cdi->ops->audio_ioctl(cdi, CDROMVOLCTRL, &volume);
+}
+
+static int cdrom_ioctl_volread(struct cdrom_device_info *cdi,
+ void __user *argp)
+{
+ struct cdrom_volctrl volume;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMVOLREAD\n");
+
+ if (!CDROM_CAN(CDC_PLAY_AUDIO))
+ return -ENOSYS;
+
+ ret = cdi->ops->audio_ioctl(cdi, CDROMVOLREAD, &volume);
+ if (ret)
+ return ret;
+
+ if (copy_to_user(argp, &volume, sizeof(volume)))
+ return -EFAULT;
+ return 0;
+}
+
+static int cdrom_ioctl_audioctl(struct cdrom_device_info *cdi,
+ unsigned int cmd)
+{
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "doing audio ioctl (start/stop/pause/resume)\n");
+
+ if (!CDROM_CAN(CDC_PLAY_AUDIO))
+ return -ENOSYS;
+ ret = check_for_audio_disc(cdi, cdi->ops);
+ if (ret)
+ return ret;
+ return cdi->ops->audio_ioctl(cdi, cmd, NULL);
+}
+
+/*
+ * Required when we need to use READ_10 to issue other than 2048 block
+ * reads
+ */
+static int cdrom_switch_blocksize(struct cdrom_device_info *cdi, int size)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct packet_command cgc;
+ struct modesel_head mh;
+
+ memset(&mh, 0, sizeof(mh));
+ mh.block_desc_length = 0x08;
+ mh.block_length_med = (size >> 8) & 0xff;
+ mh.block_length_lo = size & 0xff;
+
+ memset(&cgc, 0, sizeof(cgc));
+ cgc.cmd[0] = 0x15;
+ cgc.cmd[1] = 1 << 4;
+ cgc.cmd[4] = 12;
+ cgc.buflen = sizeof(mh);
+ cgc.buffer = (char *) &mh;
+ cgc.data_direction = CGC_DATA_WRITE;
+ mh.block_desc_length = 0x08;
+ mh.block_length_med = (size >> 8) & 0xff;
+ mh.block_length_lo = size & 0xff;
+
+ return cdo->generic_packet(cdi, &cgc);
+}
+
+static int cdrom_get_track_info(struct cdrom_device_info *cdi,
+ __u16 track, __u8 type, track_information *ti)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct packet_command cgc;
+ int ret, buflen;
+
+ init_cdrom_command(&cgc, ti, 8, CGC_DATA_READ);
+ cgc.cmd[0] = GPCMD_READ_TRACK_RZONE_INFO;
+ cgc.cmd[1] = type & 3;
+ cgc.cmd[4] = (track & 0xff00) >> 8;
+ cgc.cmd[5] = track & 0xff;
+ cgc.cmd[8] = 8;
+ cgc.quiet = 1;
+
+ ret = cdo->generic_packet(cdi, &cgc);
+ if (ret)
+ return ret;
+
+ buflen = be16_to_cpu(ti->track_information_length) +
+ sizeof(ti->track_information_length);
+
+ if (buflen > sizeof(track_information))
+ buflen = sizeof(track_information);
+
+ cgc.cmd[8] = cgc.buflen = buflen;
+ ret = cdo->generic_packet(cdi, &cgc);
+ if (ret)
+ return ret;
+
+ /* return actual fill size */
+ return buflen;
+}
+
+/* return the last written block on the CD-R media. this is for the udf
+ file system. */
+int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written)
+{
+ struct cdrom_tocentry toc;
+ disc_information di;
+ track_information ti;
+ __u32 last_track;
+ int ret = -1, ti_size;
+
+ if (!CDROM_CAN(CDC_GENERIC_PACKET))
+ goto use_toc;
+
+ ret = cdrom_get_disc_info(cdi, &di);
+ if (ret < (int)(offsetof(typeof(di), last_track_lsb)
+ + sizeof(di.last_track_lsb)))
+ goto use_toc;
+
+ /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
+ last_track = (di.last_track_msb << 8) | di.last_track_lsb;
+ ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
+ if (ti_size < (int)offsetof(typeof(ti), track_start))
+ goto use_toc;
+
+ /* if this track is blank, try the previous. */
+ if (ti.blank) {
+ if (last_track == 1)
+ goto use_toc;
+ last_track--;
+ ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
+ }
+
+ if (ti_size < (int)(offsetof(typeof(ti), track_size)
+ + sizeof(ti.track_size)))
+ goto use_toc;
+
+ /* if last recorded field is valid, return it. */
+ if (ti.lra_v && ti_size >= (int)(offsetof(typeof(ti), last_rec_address)
+ + sizeof(ti.last_rec_address))) {
+ *last_written = be32_to_cpu(ti.last_rec_address);
+ } else {
+ /* make it up instead */
+ *last_written = be32_to_cpu(ti.track_start) +
+ be32_to_cpu(ti.track_size);
+ if (ti.free_blocks)
+ *last_written -= (be32_to_cpu(ti.free_blocks) + 7);
+ }
+ return 0;
+
+ /* this is where we end up if the drive either can't do a
+ GPCMD_READ_DISC_INFO or GPCMD_READ_TRACK_RZONE_INFO or if
+ it doesn't give enough information or fails. then we return
+ the toc contents. */
+use_toc:
+ toc.cdte_format = CDROM_MSF;
+ toc.cdte_track = CDROM_LEADOUT;
+ if ((ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &toc)))
+ return ret;
+ sanitize_format(&toc.cdte_addr, &toc.cdte_format, CDROM_LBA);
+ *last_written = toc.cdte_addr.lba;
+ return 0;
+}
+
+/* return the next writable block. also for udf file system. */
+static int cdrom_get_next_writable(struct cdrom_device_info *cdi,
+ long *next_writable)
+{
+ disc_information di;
+ track_information ti;
+ __u16 last_track;
+ int ret, ti_size;
+
+ if (!CDROM_CAN(CDC_GENERIC_PACKET))
+ goto use_last_written;
+
+ ret = cdrom_get_disc_info(cdi, &di);
+ if (ret < 0 || ret < offsetof(typeof(di), last_track_lsb)
+ + sizeof(di.last_track_lsb))
+ goto use_last_written;
+
+ /* if unit didn't return msb, it's zeroed by cdrom_get_disc_info */
+ last_track = (di.last_track_msb << 8) | di.last_track_lsb;
+ ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
+ if (ti_size < 0 || ti_size < offsetof(typeof(ti), track_start))
+ goto use_last_written;
+
+ /* if this track is blank, try the previous. */
+ if (ti.blank) {
+ if (last_track == 1)
+ goto use_last_written;
+ last_track--;
+ ti_size = cdrom_get_track_info(cdi, last_track, 1, &ti);
+ if (ti_size < 0)
+ goto use_last_written;
+ }
+
+ /* if next recordable address field is valid, use it. */
+ if (ti.nwa_v && ti_size >= offsetof(typeof(ti), next_writable)
+ + sizeof(ti.next_writable)) {
+ *next_writable = be32_to_cpu(ti.next_writable);
+ return 0;
+ }
+
+use_last_written:
+ ret = cdrom_get_last_written(cdi, next_writable);
+ if (ret) {
+ *next_writable = 0;
+ return ret;
+ } else {
+ *next_writable += 7;
+ return 0;
+ }
+}
+
+static noinline int mmc_ioctl_cdrom_read_data(struct cdrom_device_info *cdi,
+ void __user *arg,
+ struct packet_command *cgc,
+ int cmd)
+{
+ struct request_sense sense;
+ struct cdrom_msf msf;
+ int blocksize = 0, format = 0, lba;
+ int ret;
+
+ switch (cmd) {
+ case CDROMREADRAW:
+ blocksize = CD_FRAMESIZE_RAW;
+ break;
+ case CDROMREADMODE1:
+ blocksize = CD_FRAMESIZE;
+ format = 2;
+ break;
+ case CDROMREADMODE2:
+ blocksize = CD_FRAMESIZE_RAW0;
+ break;
+ }
+ if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
+ return -EFAULT;
+ lba = msf_to_lba(msf.cdmsf_min0, msf.cdmsf_sec0, msf.cdmsf_frame0);
+ /* FIXME: we need upper bound checking, too!! */
+ if (lba < 0)
+ return -EINVAL;
+
+ cgc->buffer = kzalloc(blocksize, GFP_KERNEL);
+ if (cgc->buffer == NULL)
+ return -ENOMEM;
+
+ memset(&sense, 0, sizeof(sense));
+ cgc->sense = &sense;
+ cgc->data_direction = CGC_DATA_READ;
+ ret = cdrom_read_block(cdi, cgc, lba, 1, format, blocksize);
+ if (ret && sense.sense_key == 0x05 &&
+ sense.asc == 0x20 &&
+ sense.ascq == 0x00) {
+ /*
+ * SCSI-II devices are not required to support
+ * READ_CD, so let's try switching block size
+ */
+ /* FIXME: switch back again... */
+ ret = cdrom_switch_blocksize(cdi, blocksize);
+ if (ret)
+ goto out;
+ cgc->sense = NULL;
+ ret = cdrom_read_cd(cdi, cgc, lba, blocksize, 1);
+ ret |= cdrom_switch_blocksize(cdi, blocksize);
+ }
+ if (!ret && copy_to_user(arg, cgc->buffer, blocksize))
+ ret = -EFAULT;
+out:
+ kfree(cgc->buffer);
+ return ret;
+}
+
+static noinline int mmc_ioctl_cdrom_read_audio(struct cdrom_device_info *cdi,
+ void __user *arg)
+{
+ struct cdrom_read_audio ra;
+ int lba;
+
+ if (copy_from_user(&ra, (struct cdrom_read_audio __user *)arg,
+ sizeof(ra)))
+ return -EFAULT;
+
+ if (ra.addr_format == CDROM_MSF)
+ lba = msf_to_lba(ra.addr.msf.minute,
+ ra.addr.msf.second,
+ ra.addr.msf.frame);
+ else if (ra.addr_format == CDROM_LBA)
+ lba = ra.addr.lba;
+ else
+ return -EINVAL;
+
+ /* FIXME: we need upper bound checking, too!! */
+ if (lba < 0 || ra.nframes <= 0 || ra.nframes > CD_FRAMES)
+ return -EINVAL;
+
+ return cdrom_read_cdda(cdi, ra.buf, lba, ra.nframes);
+}
+
+static noinline int mmc_ioctl_cdrom_subchannel(struct cdrom_device_info *cdi,
+ void __user *arg)
+{
+ int ret;
+ struct cdrom_subchnl q;
+ u_char requested, back;
+ if (copy_from_user(&q, (struct cdrom_subchnl __user *)arg, sizeof(q)))
+ return -EFAULT;
+ requested = q.cdsc_format;
+ if (!((requested == CDROM_MSF) ||
+ (requested == CDROM_LBA)))
+ return -EINVAL;
+ q.cdsc_format = CDROM_MSF;
+ ret = cdrom_read_subchannel(cdi, &q, 0);
+ if (ret)
+ return ret;
+ back = q.cdsc_format; /* local copy */
+ sanitize_format(&q.cdsc_absaddr, &back, requested);
+ sanitize_format(&q.cdsc_reladdr, &q.cdsc_format, requested);
+ if (copy_to_user((struct cdrom_subchnl __user *)arg, &q, sizeof(q)))
+ return -EFAULT;
+ /* cd_dbg(CD_DO_IOCTL, "CDROMSUBCHNL successful\n"); */
+ return 0;
+}
+
+static noinline int mmc_ioctl_cdrom_play_msf(struct cdrom_device_info *cdi,
+ void __user *arg,
+ struct packet_command *cgc)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct cdrom_msf msf;
+ cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYMSF\n");
+ if (copy_from_user(&msf, (struct cdrom_msf __user *)arg, sizeof(msf)))
+ return -EFAULT;
+ cgc->cmd[0] = GPCMD_PLAY_AUDIO_MSF;
+ cgc->cmd[3] = msf.cdmsf_min0;
+ cgc->cmd[4] = msf.cdmsf_sec0;
+ cgc->cmd[5] = msf.cdmsf_frame0;
+ cgc->cmd[6] = msf.cdmsf_min1;
+ cgc->cmd[7] = msf.cdmsf_sec1;
+ cgc->cmd[8] = msf.cdmsf_frame1;
+ cgc->data_direction = CGC_DATA_NONE;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static noinline int mmc_ioctl_cdrom_play_blk(struct cdrom_device_info *cdi,
+ void __user *arg,
+ struct packet_command *cgc)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ struct cdrom_blk blk;
+ cd_dbg(CD_DO_IOCTL, "entering CDROMPLAYBLK\n");
+ if (copy_from_user(&blk, (struct cdrom_blk __user *)arg, sizeof(blk)))
+ return -EFAULT;
+ cgc->cmd[0] = GPCMD_PLAY_AUDIO_10;
+ cgc->cmd[2] = (blk.from >> 24) & 0xff;
+ cgc->cmd[3] = (blk.from >> 16) & 0xff;
+ cgc->cmd[4] = (blk.from >> 8) & 0xff;
+ cgc->cmd[5] = blk.from & 0xff;
+ cgc->cmd[7] = (blk.len >> 8) & 0xff;
+ cgc->cmd[8] = blk.len & 0xff;
+ cgc->data_direction = CGC_DATA_NONE;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static noinline int mmc_ioctl_cdrom_volume(struct cdrom_device_info *cdi,
+ void __user *arg,
+ struct packet_command *cgc,
+ unsigned int cmd)
+{
+ struct cdrom_volctrl volctrl;
+ unsigned char buffer[32];
+ char mask[sizeof(buffer)];
+ unsigned short offset;
+ int ret;
+
+ cd_dbg(CD_DO_IOCTL, "entering CDROMVOLUME\n");
+
+ if (copy_from_user(&volctrl, (struct cdrom_volctrl __user *)arg,
+ sizeof(volctrl)))
+ return -EFAULT;
+
+ cgc->buffer = buffer;
+ cgc->buflen = 24;
+ ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 0);
+ if (ret)
+ return ret;
+
+ /* originally the code depended on buffer[1] to determine
+ how much data is available for transfer. buffer[1] is
+ unfortunately ambigious and the only reliable way seem
+ to be to simply skip over the block descriptor... */
+ offset = 8 + be16_to_cpu(*(__be16 *)(buffer + 6));
+
+ if (offset + 16 > sizeof(buffer))
+ return -E2BIG;
+
+ if (offset + 16 > cgc->buflen) {
+ cgc->buflen = offset + 16;
+ ret = cdrom_mode_sense(cdi, cgc,
+ GPMODE_AUDIO_CTL_PAGE, 0);
+ if (ret)
+ return ret;
+ }
+
+ /* sanity check */
+ if ((buffer[offset] & 0x3f) != GPMODE_AUDIO_CTL_PAGE ||
+ buffer[offset + 1] < 14)
+ return -EINVAL;
+
+ /* now we have the current volume settings. if it was only
+ a CDROMVOLREAD, return these values */
+ if (cmd == CDROMVOLREAD) {
+ volctrl.channel0 = buffer[offset+9];
+ volctrl.channel1 = buffer[offset+11];
+ volctrl.channel2 = buffer[offset+13];
+ volctrl.channel3 = buffer[offset+15];
+ if (copy_to_user((struct cdrom_volctrl __user *)arg, &volctrl,
+ sizeof(volctrl)))
+ return -EFAULT;
+ return 0;
+ }
+
+ /* get the volume mask */
+ cgc->buffer = mask;
+ ret = cdrom_mode_sense(cdi, cgc, GPMODE_AUDIO_CTL_PAGE, 1);
+ if (ret)
+ return ret;
+
+ buffer[offset + 9] = volctrl.channel0 & mask[offset + 9];
+ buffer[offset + 11] = volctrl.channel1 & mask[offset + 11];
+ buffer[offset + 13] = volctrl.channel2 & mask[offset + 13];
+ buffer[offset + 15] = volctrl.channel3 & mask[offset + 15];
+
+ /* set volume */
+ cgc->buffer = buffer + offset - 8;
+ memset(cgc->buffer, 0, 8);
+ return cdrom_mode_select(cdi, cgc);
+}
+
+static noinline int mmc_ioctl_cdrom_start_stop(struct cdrom_device_info *cdi,
+ struct packet_command *cgc,
+ int cmd)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ cd_dbg(CD_DO_IOCTL, "entering CDROMSTART/CDROMSTOP\n");
+ cgc->cmd[0] = GPCMD_START_STOP_UNIT;
+ cgc->cmd[1] = 1;
+ cgc->cmd[4] = (cmd == CDROMSTART) ? 1 : 0;
+ cgc->data_direction = CGC_DATA_NONE;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static noinline int mmc_ioctl_cdrom_pause_resume(struct cdrom_device_info *cdi,
+ struct packet_command *cgc,
+ int cmd)
+{
+ struct cdrom_device_ops *cdo = cdi->ops;
+ cd_dbg(CD_DO_IOCTL, "entering CDROMPAUSE/CDROMRESUME\n");
+ cgc->cmd[0] = GPCMD_PAUSE_RESUME;
+ cgc->cmd[8] = (cmd == CDROMRESUME) ? 1 : 0;
+ cgc->data_direction = CGC_DATA_NONE;
+ return cdo->generic_packet(cdi, cgc);
+}
+
+static noinline int mmc_ioctl_dvd_read_struct(struct cdrom_device_info *cdi,
+ void __user *arg,
+ struct packet_command *cgc)
+{
+ int ret;
+ dvd_struct *s;
+ int size = sizeof(dvd_struct);
+
+ if (!CDROM_CAN(CDC_DVD))
+ return -ENOSYS;
+
+ s = kmalloc(size, GFP_KERNEL);
+ if (!s)
+ return -ENOMEM;
+
+ cd_dbg(CD_DO_IOCTL, "entering DVD_READ_STRUCT\n");
+ if (copy_from_user(s, arg, size)) {
+ kfree(s);
+ return -EFAULT;
+ }
+
+ ret = dvd_read_struct(cdi, s, cgc);
+ if (ret)
+ goto out;
+
+ if (copy_to_user(arg, s, size))
+ ret = -EFAULT;
+out:
+ kfree(s);
+ return ret;
+}
+
+static noinline int mmc_ioctl_dvd_auth(struct cdrom_device_info *cdi,
+ void __user *arg)
+{
+ int ret;
+ dvd_authinfo ai;
+ if (!CDROM_CAN(CDC_DVD))
+ return -ENOSYS;
+ cd_dbg(CD_DO_IOCTL, "entering DVD_AUTH\n");
+ if (copy_from_user(&ai, (dvd_authinfo __user *)arg, sizeof(ai)))
+ return -EFAULT;
+ ret = dvd_do_auth(cdi, &ai);
+ if (ret)
+ return ret;
+ if (copy_to_user((dvd_authinfo __user *)arg, &ai, sizeof(ai)))
+ return -EFAULT;
+ return 0;
+}
+
+static noinline int mmc_ioctl_cdrom_next_writable(struct cdrom_device_info *cdi,
+ void __user *arg)
+{
+ int ret;
+ long next = 0;
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_NEXT_WRITABLE\n");
+ ret = cdrom_get_next_writable(cdi, &next);
+ if (ret)
+ return ret;
+ if (copy_to_user((long __user *)arg, &next, sizeof(next)))
+ return -EFAULT;
+ return 0;
+}
+
+static noinline int mmc_ioctl_cdrom_last_written(struct cdrom_device_info *cdi,
+ void __user *arg)
+{
+ int ret;
+ long last = 0;
+ cd_dbg(CD_DO_IOCTL, "entering CDROM_LAST_WRITTEN\n");
+ ret = cdrom_get_last_written(cdi, &last);
+ if (ret)
+ return ret;
+ if (copy_to_user((long __user *)arg, &last, sizeof(last)))
+ return -EFAULT;
+ return 0;
+}
+
+static int mmc_ioctl(struct cdrom_device_info *cdi, unsigned int cmd,
+ unsigned long arg)
+{
+ struct packet_command cgc;
+ void __user *userptr = (void __user *)arg;
+
+ memset(&cgc, 0, sizeof(cgc));
+
+ /* build a unified command and queue it through
+ cdo->generic_packet() */
+ switch (cmd) {
+ case CDROMREADRAW:
+ case CDROMREADMODE1:
+ case CDROMREADMODE2:
+ return mmc_ioctl_cdrom_read_data(cdi, userptr, &cgc, cmd);
+ case CDROMREADAUDIO:
+ return mmc_ioctl_cdrom_read_audio(cdi, userptr);
+ case CDROMSUBCHNL:
+ return mmc_ioctl_cdrom_subchannel(cdi, userptr);
+ case CDROMPLAYMSF:
+ return mmc_ioctl_cdrom_play_msf(cdi, userptr, &cgc);
+ case CDROMPLAYBLK:
+ return mmc_ioctl_cdrom_play_blk(cdi, userptr, &cgc);
+ case CDROMVOLCTRL:
+ case CDROMVOLREAD:
+ return mmc_ioctl_cdrom_volume(cdi, userptr, &cgc, cmd);
+ case CDROMSTART:
+ case CDROMSTOP:
+ return mmc_ioctl_cdrom_start_stop(cdi, &cgc, cmd);
+ case CDROMPAUSE:
+ case CDROMRESUME:
+ return mmc_ioctl_cdrom_pause_resume(cdi, &cgc, cmd);
+ case DVD_READ_STRUCT:
+ return mmc_ioctl_dvd_read_struct(cdi, userptr, &cgc);
+ case DVD_AUTH:
+ return mmc_ioctl_dvd_auth(cdi, userptr);
+ case CDROM_NEXT_WRITABLE:
+ return mmc_ioctl_cdrom_next_writable(cdi, userptr);
+ case CDROM_LAST_WRITTEN:
+ return mmc_ioctl_cdrom_last_written(cdi, userptr);
+ }
+
+ return -ENOTTY;
+}
+
+/*
+ * Just about every imaginable ioctl is supported in the Uniform layer
+ * these days.
+ * ATAPI / SCSI specific code now mainly resides in mmc_ioctl().
+ */
+int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
+ fmode_t mode, unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int ret;
+
+ /*
+ * Try the generic SCSI command ioctl's first.
+ */
+ ret = scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
+ if (ret != -ENOTTY)
+ return ret;
+
+ switch (cmd) {
+ case CDROMMULTISESSION:
+ return cdrom_ioctl_multisession(cdi, argp);
+ case CDROMEJECT:
+ return cdrom_ioctl_eject(cdi);
+ case CDROMCLOSETRAY:
+ return cdrom_ioctl_closetray(cdi);
+ case CDROMEJECT_SW:
+ return cdrom_ioctl_eject_sw(cdi, arg);
+ case CDROM_MEDIA_CHANGED:
+ return cdrom_ioctl_media_changed(cdi, arg);
+ case CDROM_SET_OPTIONS:
+ return cdrom_ioctl_set_options(cdi, arg);
+ case CDROM_CLEAR_OPTIONS:
+ return cdrom_ioctl_clear_options(cdi, arg);
+ case CDROM_SELECT_SPEED:
+ return cdrom_ioctl_select_speed(cdi, arg);
+ case CDROM_SELECT_DISC:
+ return cdrom_ioctl_select_disc(cdi, arg);
+ case CDROMRESET:
+ return cdrom_ioctl_reset(cdi, bdev);
+ case CDROM_LOCKDOOR:
+ return cdrom_ioctl_lock_door(cdi, arg);
+ case CDROM_DEBUG:
+ return cdrom_ioctl_debug(cdi, arg);
+ case CDROM_GET_CAPABILITY:
+ return cdrom_ioctl_get_capability(cdi);
+ case CDROM_GET_MCN:
+ return cdrom_ioctl_get_mcn(cdi, argp);
+ case CDROM_DRIVE_STATUS:
+ return cdrom_ioctl_drive_status(cdi, arg);
+ case CDROM_DISC_STATUS:
+ return cdrom_ioctl_disc_status(cdi);
+ case CDROM_CHANGER_NSLOTS:
+ return cdrom_ioctl_changer_nslots(cdi);
+ }
+
+ /*
+ * Use the ioctls that are implemented through the generic_packet()
+ * interface. this may look at bit funny, but if -ENOTTY is
+ * returned that particular ioctl is not implemented and we
+ * let it go through the device specific ones.
+ */
+ if (CDROM_CAN(CDC_GENERIC_PACKET)) {
+ ret = mmc_ioctl(cdi, cmd, arg);
+ if (ret != -ENOTTY)
+ return ret;
+ }
+
+ /*
+ * Note: most of the cd_dbg() calls are commented out here,
+ * because they fill up the sys log when CD players poll
+ * the drive.
+ */
+ switch (cmd) {
+ case CDROMSUBCHNL:
+ return cdrom_ioctl_get_subchnl(cdi, argp);
+ case CDROMREADTOCHDR:
+ return cdrom_ioctl_read_tochdr(cdi, argp);
+ case CDROMREADTOCENTRY:
+ return cdrom_ioctl_read_tocentry(cdi, argp);
+ case CDROMPLAYMSF:
+ return cdrom_ioctl_play_msf(cdi, argp);
+ case CDROMPLAYTRKIND:
+ return cdrom_ioctl_play_trkind(cdi, argp);
+ case CDROMVOLCTRL:
+ return cdrom_ioctl_volctrl(cdi, argp);
+ case CDROMVOLREAD:
+ return cdrom_ioctl_volread(cdi, argp);
+ case CDROMSTART:
+ case CDROMSTOP:
+ case CDROMPAUSE:
+ case CDROMRESUME:
+ return cdrom_ioctl_audioctl(cdi, cmd);
+ }
+
+ return -ENOSYS;
+}
+
+EXPORT_SYMBOL(cdrom_get_last_written);
+EXPORT_SYMBOL(register_cdrom);
+EXPORT_SYMBOL(unregister_cdrom);
+EXPORT_SYMBOL(cdrom_open);
+EXPORT_SYMBOL(cdrom_release);
+EXPORT_SYMBOL(cdrom_ioctl);
+EXPORT_SYMBOL(cdrom_media_changed);
+EXPORT_SYMBOL(cdrom_number_of_slots);
+EXPORT_SYMBOL(cdrom_mode_select);
+EXPORT_SYMBOL(cdrom_mode_sense);
+EXPORT_SYMBOL(init_cdrom_command);
+EXPORT_SYMBOL(cdrom_get_media_event);
+
+#ifdef CONFIG_SYSCTL
+
+#define CDROM_STR_SIZE 1000
+
+static struct cdrom_sysctl_settings {
+ char info[CDROM_STR_SIZE]; /* general info */
+ int autoclose; /* close tray upon mount, etc */
+ int autoeject; /* eject on umount */
+ int debug; /* turn on debugging messages */
+ int lock; /* lock the door on device open */
+ int check; /* check media type */
+} cdrom_sysctl_settings;
+
+enum cdrom_print_option {
+ CTL_NAME,
+ CTL_SPEED,
+ CTL_SLOTS,
+ CTL_CAPABILITY
+};
+
+static int cdrom_print_info(const char *header, int val, char *info,
+ int *pos, enum cdrom_print_option option)
+{
+ const int max_size = sizeof(cdrom_sysctl_settings.info);
+ struct cdrom_device_info *cdi;
+ int ret;
+
+ ret = scnprintf(info + *pos, max_size - *pos, header);
+ if (!ret)
+ return 1;
+
+ *pos += ret;
+
+ list_for_each_entry(cdi, &cdrom_list, list) {
+ switch (option) {
+ case CTL_NAME:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%s", cdi->name);
+ break;
+ case CTL_SPEED:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", cdi->speed);
+ break;
+ case CTL_SLOTS:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", cdi->capacity);
+ break;
+ case CTL_CAPABILITY:
+ ret = scnprintf(info + *pos, max_size - *pos,
+ "\t%d", CDROM_CAN(val) != 0);
+ break;
+ default:
+ pr_info("invalid option%d\n", option);
+ return 1;
+ }
+ if (!ret)
+ return 1;
+ *pos += ret;
+ }
+
+ return 0;
+}
+
+static int cdrom_sysctl_info(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int pos;
+ char *info = cdrom_sysctl_settings.info;
+ const int max_size = sizeof(cdrom_sysctl_settings.info);
+
+ if (!*lenp || (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+
+ mutex_lock(&cdrom_mutex);
+
+ pos = sprintf(info, "CD-ROM information, " VERSION "\n");
+
+ if (cdrom_print_info("\ndrive name:\t", 0, info, &pos, CTL_NAME))
+ goto done;
+ if (cdrom_print_info("\ndrive speed:\t", 0, info, &pos, CTL_SPEED))
+ goto done;
+ if (cdrom_print_info("\ndrive # of slots:", 0, info, &pos, CTL_SLOTS))
+ goto done;
+ if (cdrom_print_info("\nCan close tray:\t",
+ CDC_CLOSE_TRAY, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan open tray:\t",
+ CDC_OPEN_TRAY, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan lock tray:\t",
+ CDC_LOCK, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan change speed:",
+ CDC_SELECT_SPEED, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan select disk:",
+ CDC_SELECT_DISC, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read multisession:",
+ CDC_MULTI_SESSION, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read MCN:\t",
+ CDC_MCN, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nReports media changed:",
+ CDC_MEDIA_CHANGED, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan play audio:\t",
+ CDC_PLAY_AUDIO, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write CD-R:\t",
+ CDC_CD_R, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write CD-RW:",
+ CDC_CD_RW, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read DVD:\t",
+ CDC_DVD, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write DVD-R:",
+ CDC_DVD_R, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write DVD-RAM:",
+ CDC_DVD_RAM, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan read MRW:\t",
+ CDC_MRW, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write MRW:\t",
+ CDC_MRW_W, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (cdrom_print_info("\nCan write RAM:\t",
+ CDC_RAM, info, &pos, CTL_CAPABILITY))
+ goto done;
+ if (!scnprintf(info + pos, max_size - pos, "\n\n"))
+ goto done;
+doit:
+ mutex_unlock(&cdrom_mutex);
+ return proc_dostring(ctl, write, buffer, lenp, ppos);
+done:
+ pr_info("info buffer too small\n");
+ goto doit;
+}
+
+/* Unfortunately, per device settings are not implemented through
+ procfs/sysctl yet. When they are, this will naturally disappear. For now
+ just update all drives. Later this will become the template on which
+ new registered drives will be based. */
+static void cdrom_update_settings(void)
+{
+ struct cdrom_device_info *cdi;
+
+ mutex_lock(&cdrom_mutex);
+ list_for_each_entry(cdi, &cdrom_list, list) {
+ if (autoclose && CDROM_CAN(CDC_CLOSE_TRAY))
+ cdi->options |= CDO_AUTO_CLOSE;
+ else if (!autoclose)
+ cdi->options &= ~CDO_AUTO_CLOSE;
+ if (autoeject && CDROM_CAN(CDC_OPEN_TRAY))
+ cdi->options |= CDO_AUTO_EJECT;
+ else if (!autoeject)
+ cdi->options &= ~CDO_AUTO_EJECT;
+ if (lockdoor && CDROM_CAN(CDC_LOCK))
+ cdi->options |= CDO_LOCK;
+ else if (!lockdoor)
+ cdi->options &= ~CDO_LOCK;
+ if (check_media_type)
+ cdi->options |= CDO_CHECK_TYPE;
+ else
+ cdi->options &= ~CDO_CHECK_TYPE;
+ }
+ mutex_unlock(&cdrom_mutex);
+}
+
+static int cdrom_sysctl_handler(struct ctl_table *ctl, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int ret;
+
+ ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
+
+ if (write) {
+
+ /* we only care for 1 or 0. */
+ autoclose = !!cdrom_sysctl_settings.autoclose;
+ autoeject = !!cdrom_sysctl_settings.autoeject;
+ debug = !!cdrom_sysctl_settings.debug;
+ lockdoor = !!cdrom_sysctl_settings.lock;
+ check_media_type = !!cdrom_sysctl_settings.check;
+
+ /* update the option flags according to the changes. we
+ don't have per device options through sysctl yet,
+ but we will have and then this will disappear. */
+ cdrom_update_settings();
+ }
+
+ return ret;
+}
+
+/* Place files in /proc/sys/dev/cdrom */
+static struct ctl_table cdrom_table[] = {
+ {
+ .procname = "info",
+ .data = &cdrom_sysctl_settings.info,
+ .maxlen = CDROM_STR_SIZE,
+ .mode = 0444,
+ .proc_handler = cdrom_sysctl_info,
+ },
+ {
+ .procname = "autoclose",
+ .data = &cdrom_sysctl_settings.autoclose,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "autoeject",
+ .data = &cdrom_sysctl_settings.autoeject,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "debug",
+ .data = &cdrom_sysctl_settings.debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "lock",
+ .data = &cdrom_sysctl_settings.lock,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler,
+ },
+ {
+ .procname = "check_media",
+ .data = &cdrom_sysctl_settings.check,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = cdrom_sysctl_handler
+ },
+ { }
+};
+
+static struct ctl_table cdrom_cdrom_table[] = {
+ {
+ .procname = "cdrom",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = cdrom_table,
+ },
+ { }
+};
+
+/* Make sure that /proc/sys/dev is there */
+static struct ctl_table cdrom_root_table[] = {
+ {
+ .procname = "dev",
+ .maxlen = 0,
+ .mode = 0555,
+ .child = cdrom_cdrom_table,
+ },
+ { }
+};
+static struct ctl_table_header *cdrom_sysctl_header;
+
+static void cdrom_sysctl_register(void)
+{
+ static int initialized;
+
+ if (initialized == 1)
+ return;
+
+ cdrom_sysctl_header = register_sysctl_table(cdrom_root_table);
+
+ /* set the defaults */
+ cdrom_sysctl_settings.autoclose = autoclose;
+ cdrom_sysctl_settings.autoeject = autoeject;
+ cdrom_sysctl_settings.debug = debug;
+ cdrom_sysctl_settings.lock = lockdoor;
+ cdrom_sysctl_settings.check = check_media_type;
+
+ initialized = 1;
+}
+
+static void cdrom_sysctl_unregister(void)
+{
+ if (cdrom_sysctl_header)
+ unregister_sysctl_table(cdrom_sysctl_header);
+}
+
+#else /* CONFIG_SYSCTL */
+
+static void cdrom_sysctl_register(void)
+{
+}
+
+static void cdrom_sysctl_unregister(void)
+{
+}
+
+#endif /* CONFIG_SYSCTL */
+
+static int __init cdrom_init(void)
+{
+ cdrom_sysctl_register();
+
+ return 0;
+}
+
+static void __exit cdrom_exit(void)
+{
+ pr_info("Uniform CD-ROM driver unloaded\n");
+ cdrom_sysctl_unregister();
+}
+
+module_init(cdrom_init);
+module_exit(cdrom_exit);
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff