drivers/s390/net/cu3088.c

   1 /*
   2  * $Id: cu3088.c,v 1.35 2005/03/30 19:28:52 richtera Exp $
   3  *
   4  * CTC / LCS ccw_device driver
   5  *
   6  * Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
   7  * Author(s): Arnd Bergmann <arndb@de.ibm.com>
   8  *            Cornelia Huck <cohuck@de.ibm.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2, or (at your option)
  13  * any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23  *
  24  */
  25 \f
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/err.h>
  29
  30 #include <asm/ccwdev.h>
  31 #include <asm/ccwgroup.h>
  32
  33 #include "cu3088.h"
  34
  35 const char *cu3088_type[] = {
  36         "not a channel",
  37         "CTC/A",
  38         "ESCON channel",
  39         "FICON channel",
  40         "P390 LCS card",
  41         "OSA LCS card",
  42         "CLAW channel device",
  43         "unknown channel type",
  44         "unsupported channel type",
  45 };
  46
  47 /* static definitions */
  48
  49 static struct ccw_device_id cu3088_ids[] = {
  50         { CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel },
  51         { CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon },
  52         { CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon },
  53         { CCW_DEVICE(0x3088, 0x01), .driver_info = channel_type_p390 },
  54         { CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 },
  55         { CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw },
  56         { /* end of list */ }
  57 };
  58
  59 static struct ccw_driver cu3088_driver;
  60
  61 struct device *cu3088_root_dev;
  62
  63 static ssize_t
  64 group_write(struct device_driver *drv, const char *buf, size_t count)
  65 {
  66         const char *start, *end;
  67         char bus_ids[2][BUS_ID_SIZE], *argv[2];
  68         int i;
  69         int ret;
  70         struct ccwgroup_driver *cdrv;
  71
  72         cdrv = to_ccwgroupdrv(drv);
  73         if (!cdrv)
  74                 return -EINVAL;
  75         start = buf;
  76         for (i=0; i<2; i++) {
  77                 static const char delim[] = {',', '\n'};
  78                 int len;
  79
  80                 if (!(end = strchr(start, delim[i])))
  81                         return count;
  82                 len = min_t(ptrdiff_t, BUS_ID_SIZE, end - start + 1);
  83                 strlcpy (bus_ids[i], start, len);
  84                 argv[i] = bus_ids[i];
  85                 start = end + 1;
  86         }
  87
  88         ret = ccwgroup_create(cu3088_root_dev, cdrv->driver_id,
  89                               &cu3088_driver, 2, argv);
  90
  91         return (ret == 0) ? count : ret;
  92 }
  93
  94 static DRIVER_ATTR(group, 0200, NULL, group_write);
  95
  96 /* Register-unregister for ctc&lcs */
  97 int
  98 register_cu3088_discipline(struct ccwgroup_driver *dcp)
  99 {
 100         int rc;
 101
 102         if (!dcp)
 103                 return -EINVAL;
 104
 105         /* Register discipline.*/
 106         rc = ccwgroup_driver_register(dcp);
 107         if (rc)
 108                 return rc;
 109
 110         rc = driver_create_file(&dcp->driver, &driver_attr_group);
 111         if (rc)
 112                 ccwgroup_driver_unregister(dcp);
 113
 114         return rc;
 115
 116 }
 117
 118 void
 119 unregister_cu3088_discipline(struct ccwgroup_driver *dcp)
 120 {
 121         if (!dcp)
 122                 return;
 123
 124         driver_remove_file(&dcp->driver, &driver_attr_group);
 125         ccwgroup_driver_unregister(dcp);
 126 }
 127
 128 static struct ccw_driver cu3088_driver = {
 129         .owner       = THIS_MODULE,
 130         .ids         = cu3088_ids,
 131         .name        = "cu3088",
 132         .probe       = ccwgroup_probe_ccwdev,
 133         .remove      = ccwgroup_remove_ccwdev,
 134 };
 135
 136 /* module setup */
 137 static int __init
 138 cu3088_init (void)
 139 {
 140         int rc;
 141
 142         cu3088_root_dev = s390_root_dev_register("cu3088");
 143         if (IS_ERR(cu3088_root_dev))
 144                 return PTR_ERR(cu3088_root_dev);
 145         rc = ccw_driver_register(&cu3088_driver);
 146         if (rc)
 147                 s390_root_dev_unregister(cu3088_root_dev);
 148
 149         return rc;
 150 }
 151
 152 static void __exit
 153 cu3088_exit (void)
 154 {
 155         ccw_driver_unregister(&cu3088_driver);
 156         s390_root_dev_unregister(cu3088_root_dev);
 157 }
 158
 159 MODULE_DEVICE_TABLE(ccw,cu3088_ids);
 160 MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
 161 MODULE_LICENSE("GPL");
 162
 163 module_init(cu3088_init);
 164 module_exit(cu3088_exit);
 165
 166 EXPORT_SYMBOL_GPL(cu3088_type);
 167 EXPORT_SYMBOL_GPL(register_cu3088_discipline);
 168 EXPORT_SYMBOL_GPL(unregister_cu3088_discipline);