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/ccwdev.h>
  29 #include <asm/ccwgroup.h>
  30
  31 #include "cu3088.h"
  32
  33 const char *cu3088_type[] = {
  34         "not a channel",
  35         "CTC/A",
  36         "ESCON channel",
  37         "FICON channel",
  38         "OSA LCS card",
  39         "CLAW channel device",
  40         "unknown channel type",
  41         "unsupported channel type",
  42 };
  43
  44 /* static definitions */
  45
  46 static struct ccw_device_id cu3088_ids[] = {
  47         { CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel },
  48         { CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon },
  49         { CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon },
  50         { CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 },
  51         { CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw },
  52         { /* end of list */ }
  53 };
  54
  55 static struct ccw_driver cu3088_driver;
  56
  57 static struct device *cu3088_root_dev;
  58
  59 static ssize_t
  60 group_write(struct device_driver *drv, const char *buf, size_t count)
  61 {
  62         int ret;
  63         struct ccwgroup_driver *cdrv;
  64
  65         cdrv = to_ccwgroupdrv(drv);
  66         if (!cdrv)
  67                 return -EINVAL;
  68         ret = ccwgroup_create_from_string(cu3088_root_dev, cdrv->driver_id,
  69                                           &cu3088_driver, 2, buf);
  70
  71         return (ret == 0) ? count : ret;
  72 }
  73
  74 static DRIVER_ATTR(group, 0200, NULL, group_write);
  75
  76 /* Register-unregister for ctc&lcs */
  77 int
  78 register_cu3088_discipline(struct ccwgroup_driver *dcp)
  79 {
  80         int rc;
  81
  82         if (!dcp)
  83                 return -EINVAL;
  84
  85         /* Register discipline.*/
  86         rc = ccwgroup_driver_register(dcp);
  87         if (rc)
  88                 return rc;
  89
  90         rc = driver_create_file(&dcp->driver, &driver_attr_group);
  91         if (rc)
  92                 ccwgroup_driver_unregister(dcp);
  93
  94         return rc;
  95
  96 }
  97
  98 void
  99 unregister_cu3088_discipline(struct ccwgroup_driver *dcp)
 100 {
 101         if (!dcp)
 102                 return;
 103
 104         driver_remove_file(&dcp->driver, &driver_attr_group);
 105         ccwgroup_driver_unregister(dcp);
 106 }
 107
 108 static struct ccw_driver cu3088_driver = {
 109         .owner       = THIS_MODULE,
 110         .ids         = cu3088_ids,
 111         .name        = "cu3088",
 112         .probe       = ccwgroup_probe_ccwdev,
 113         .remove      = ccwgroup_remove_ccwdev,
 114 };
 115
 116 /* module setup */
 117 static int __init
 118 cu3088_init (void)
 119 {
 120         int rc;
 121
 122         cu3088_root_dev = root_device_register("cu3088");
 123         if (IS_ERR(cu3088_root_dev))
 124                 return PTR_ERR(cu3088_root_dev);
 125         rc = ccw_driver_register(&cu3088_driver);
 126         if (rc)
 127                 root_device_unregister(cu3088_root_dev);
 128
 129         return rc;
 130 }
 131
 132 static void __exit
 133 cu3088_exit (void)
 134 {
 135         ccw_driver_unregister(&cu3088_driver);
 136         root_device_unregister(cu3088_root_dev);
 137 }
 138
 139 MODULE_DEVICE_TABLE(ccw,cu3088_ids);
 140 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
 141 MODULE_LICENSE("GPL");
 142
 143 module_init(cu3088_init);
 144 module_exit(cu3088_exit);
 145
 146 EXPORT_SYMBOL_GPL(cu3088_type);
 147 EXPORT_SYMBOL_GPL(register_cu3088_discipline);
 148 EXPORT_SYMBOL_GPL(unregister_cu3088_discipline);