linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 * SCSI Media Changer device driver for Linux 2.6

 *

 *     (c) 1996-2003 Gerd Knorr <kraxel@bytesex.org>

 *

 */

​

#define VERSION "0.25"

​

#include <linux/module.h>

#include <linux/init.h>

#include <linux/fs.h>

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/major.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/interrupt.h>

#include <linux/blkdev.h>

#include <linux/completion.h>

#include <linux/compat.h>

#include <linux/chio.h>         /* here are all the ioctls */

#include <linux/mutex.h>

#include <linux/idr.h>

#include <linux/slab.h>

​

#include <scsi/scsi.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_driver.h>

#include <scsi/scsi_ioctl.h>

#include <scsi/scsi_host.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_eh.h>

#include <scsi/scsi_dbg.h>

​

#define CH_DT_MAX       16

#define CH_TYPES        8

#define CH_MAX_DEVS     128

​

MODULE_DESCRIPTION("device driver for scsi media changer devices");

MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org>");

MODULE_LICENSE("GPL");

MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);

MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);

​

static DEFINE_MUTEX(ch_mutex);

static int init = 1;

module_param(init, int, 0444);

MODULE_PARM_DESC(init, \

    "initialize element status on driver load (default: on)");

​

static int timeout_move = 300;

module_param(timeout_move, int, 0644);

MODULE_PARM_DESC(timeout_move,"timeout for move commands "

         "(default: 300 seconds)");

​

static int timeout_init = 3600;

module_param(timeout_init, int, 0644);

MODULE_PARM_DESC(timeout_init,"timeout for INITIALIZE ELEMENT STATUS "

         "(default: 3600 seconds)");

​

static int verbose = 1;

module_param(verbose, int, 0644);

MODULE_PARM_DESC(verbose,"be verbose (default: on)");

​

static int debug = 0;

module_param(debug, int, 0644);

MODULE_PARM_DESC(debug,"enable/disable debug messages, also prints more "

         "detailed sense codes on scsi errors (default: off)");

​

static int dt_id[CH_DT_MAX] = { [ 0 ... (CH_DT_MAX-1) ] = -1 };

static int dt_lun[CH_DT_MAX];

module_param_array(dt_id,  int, NULL, 0444);

module_param_array(dt_lun, int, NULL, 0444);

​

/* tell the driver about vendor-specific slots */

static int vendor_firsts[CH_TYPES-4];

static int vendor_counts[CH_TYPES-4];

module_param_array(vendor_firsts, int, NULL, 0444);

module_param_array(vendor_counts, int, NULL, 0444);

​

static const char * vendor_labels[CH_TYPES-4] = {

    "v0", "v1", "v2", "v3"

};

// module_param_string_array(vendor_labels, NULL, 0444);

​

#define ch_printk(prefix, ch, fmt, a...) \

    sdev_prefix_printk(prefix, (ch)->device, (ch)->name, fmt, ##a)

​

#define DPRINTK(fmt, arg...)                        \

do {                                    \