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
group_write(struct device_driver * drv,const char * buf,size_t count)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
register_cu3088_discipline(struct ccwgroup_driver * dcp)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
unregister_cu3088_discipline(struct ccwgroup_driver * dcp)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
cu3088_init(void)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
cu3088_exit(void)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);
149