[PATCH] s390: claw driver wiring
[linux-3.10.git] / 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);