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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux-2.6-omap-h63xx.git] / 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);