drivers/s390/net/cu3088.c

   1 /*
   2  * CTC / LCS ccw_device driver
   3  *
   4  * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
   5  * Author(s): Arnd Bergmann <arndb@de.ibm.com>
   6  *            Cornelia Huck <cornelia.huck@de.ibm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/err.h>
  27
  28 #include <asm/s390_rdev.h>
  29 #include <asm/ccwdev.h>
  30 #include <asm/ccwgroup.h>
  31
  32 #include "cu3088.h"
  33
  34 const char *cu3088_type[] = {
  35         "not a channel",
  36         "CTC/A",
  37         "ESCON channel",
  38         "FICON channel",
  39         "OSA LCS card",
  40         "CLAW channel device",
  41         "unknown channel type",
  42         "unsupported channel type",
  43 };
  44
  45 /* static definitions */
  46
  47 static struct ccw_device_id cu3088_ids[] = {
  48         { CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel },
  49         { CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon },
  50         { CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon },
  51         { CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 },
  52         { CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw },
  53         { /* end of list */ }
  54 };
  55
  56 static struct ccw_driver cu3088_driver;
  57
  58 static struct device *cu3088_root_dev;
  59
  60 static ssize_t
  61 group_write(struct device_driver *drv, const char *buf, size_t count)
  62 {
  63         int ret;
  64         struct ccwgroup_driver *cdrv;
  65
  66         cdrv = to_ccwgroupdrv(drv);
  67         if (!cdrv)
  68                 return -EINVAL;
  69         ret = ccwgroup_create_from_string(cu3088_root_dev, cdrv->driver_id,
  70                                           &cu3088_driver, 2, buf);
  71
  72         return (ret == 0) ? count : ret;
  73 }
  74
  75 static DRIVER_ATTR(group, 0200, NULL, group_write);
  76
  77 /* Register-unregister for ctc&lcs */
  78 int
  79 register_cu3088_discipline(struct ccwgroup_driver *dcp)
  80 {
  81         int rc;
  82
  83         if (!dcp)
  84                 return -EINVAL;
  85
  86         /* Register discipline.*/
  87         rc = ccwgroup_driver_register(dcp);
  88         if (rc)
  89                 return rc;
  90
  91         rc = driver_create_file(&dcp->driver, &driver_attr_group);
  92         if (rc)
  93                 ccwgroup_driver_unregister(dcp);
  94
  95         return rc;
  96
  97 }
  98
  99 void
 100 unregister_cu3088_discipline(struct ccwgroup_driver *dcp)
 101 {
 102         if (!dcp)
 103                 return;
 104
 105         driver_remove_file(&dcp->driver, &driver_attr_group);
 106         ccwgroup_driver_unregister(dcp);
 107 }
 108
 109 static struct ccw_driver cu3088_driver = {
 110         .owner       = THIS_MODULE,
 111         .ids         = cu3088_ids,
 112         .name        = "cu3088",
 113         .probe       = ccwgroup_probe_ccwdev,
 114         .remove      = ccwgroup_remove_ccwdev,
 115 };
 116
 117 /* module setup */
 118 static int __init
 119 cu3088_init (void)
 120 {
 121         int rc;
 122
 123         cu3088_root_dev = s390_root_dev_register("cu3088");
 124         if (IS_ERR(cu3088_root_dev))
 125                 return PTR_ERR(cu3088_root_dev);
 126         rc = ccw_driver_register(&cu3088_driver);
 127         if (rc)
 128                 s390_root_dev_unregister(cu3088_root_dev);
 129
 130         return rc;
 131 }
 132
 133 static void __exit
 134 cu3088_exit (void)
 135 {
 136         ccw_driver_unregister(&cu3088_driver);
 137         s390_root_dev_unregister(cu3088_root_dev);
 138 }
 139
 140 MODULE_DEVICE_TABLE(ccw,cu3088_ids);
 141 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
 142 MODULE_LICENSE("GPL");
 143
 144 module_init(cu3088_init);
 145 module_exit(cu3088_exit);
 146
 147 EXPORT_SYMBOL_GPL(cu3088_type);
 148 EXPORT_SYMBOL_GPL(register_cu3088_discipline);
 149 EXPORT_SYMBOL_GPL(unregister_cu3088_discipline);