linux-imx

/*

 *  sr.c Copyright (C) 1992 David Giller

 *           Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale

 *

 *  adapted from:

 *      sd.c Copyright (C) 1992 Drew Eckhardt

 *      Linux scsi disk driver by

 *              Drew Eckhardt <drew@colorado.edu>

 *

 *  Modified by Eric Youngdale ericy@andante.org to

 *  add scatter-gather, multiple outstanding request, and other

 *  enhancements.

 *

 *      Modified by Eric Youngdale eric@andante.org to support loadable

 *      low-level scsi drivers.

 *

 *      Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to

 *      provide auto-eject.

 *

 *      Modified by Gerd Knorr <kraxel@cs.tu-berlin.de> to support the

 *      generic cdrom interface

 *

 *      Modified by Jens Axboe <axboe@suse.de> - Uniform sr_packet()

 *      interface, capabilities probe additions, ioctl cleanups, etc.

 *

 *  Modified by Richard Gooch <rgooch@atnf.csiro.au> to support devfs

 *

 *  Modified by Jens Axboe <axboe@suse.de> - support DVD-RAM

 *  transparently and lose the GHOST hack

 *

 *  Modified by Arnaldo Carvalho de Melo <acme@conectiva.com.br>

 *  check resource allocation in sr_init and some cleanups

 */

​

#include <linux/module.h>

#include <linux/fs.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/bio.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/cdrom.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/blkdev.h>

#include <linux/blk-pm.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/pm_runtime.h>

#include <linux/uaccess.h>

​

#include <scsi/scsi.h>

#include <scsi/scsi_dbg.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_driver.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_eh.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_ioctl.h>    /* For the door lock/unlock commands */

​

#include "scsi_logging.h"

#include "sr.h"

​

​

MODULE_DESCRIPTION("SCSI cdrom (sr) driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR);

MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM);

MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM);

​

#define SR_DISKS    256

​

#define SR_CAPABILITIES \

    (CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \

     CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \

     CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \

     CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \

     CDC_MRW|CDC_MRW_W|CDC_RAM)

​

static DEFINE_MUTEX(sr_mutex);

static int sr_probe(struct device *);

static int sr_remove(struct device *);

static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt);

static int sr_done(struct scsi_cmnd *);

static int sr_runtime_suspend(struct device *dev);

​

static const struct dev_pm_ops sr_pm_ops = {

    .runtime_suspend    = sr_runtime_suspend,

};

​

static struct scsi_driver sr_template = {

    .gendrv = {