blob: e965f03a7291659a8384998e57eb30748a9b422a [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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>
Cornelia Huck4ce3b302006-01-14 13:21:04 -08006 * Cornelia Huck <cornelia.huck@de.ibm.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
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 */
Jeff Garzike82b0f22006-05-26 21:58:38 -040023
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/init.h>
25#include <linux/module.h>
26#include <linux/err.h>
27
Carsten Ottecfb1b552006-01-06 00:19:14 -080028#include <asm/s390_rdev.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <asm/ccwdev.h>
30#include <asm/ccwgroup.h>
31
32#include "cu3088.h"
33
34const char *cu3088_type[] = {
35 "not a channel",
36 "CTC/A",
37 "ESCON channel",
38 "FICON channel",
39 "P390 LCS card",
40 "OSA LCS card",
Frank Pavlic321de3c2005-05-12 20:17:46 +020041 "CLAW channel device",
Linus Torvalds1da177e2005-04-16 15:20:36 -070042 "unknown channel type",
43 "unsupported channel type",
44};
45
46/* static definitions */
47
48static struct ccw_device_id cu3088_ids[] = {
49 { CCW_DEVICE(0x3088, 0x08), .driver_info = channel_type_parallel },
50 { CCW_DEVICE(0x3088, 0x1f), .driver_info = channel_type_escon },
51 { CCW_DEVICE(0x3088, 0x1e), .driver_info = channel_type_ficon },
52 { CCW_DEVICE(0x3088, 0x01), .driver_info = channel_type_p390 },
53 { CCW_DEVICE(0x3088, 0x60), .driver_info = channel_type_osa2 },
Frank Pavlic321de3c2005-05-12 20:17:46 +020054 { CCW_DEVICE(0x3088, 0x61), .driver_info = channel_type_claw },
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 { /* end of list */ }
56};
57
58static struct ccw_driver cu3088_driver;
59
60struct device *cu3088_root_dev;
61
62static ssize_t
63group_write(struct device_driver *drv, const char *buf, size_t count)
64{
65 const char *start, *end;
66 char bus_ids[2][BUS_ID_SIZE], *argv[2];
67 int i;
68 int ret;
69 struct ccwgroup_driver *cdrv;
70
71 cdrv = to_ccwgroupdrv(drv);
72 if (!cdrv)
73 return -EINVAL;
74 start = buf;
75 for (i=0; i<2; i++) {
76 static const char delim[] = {',', '\n'};
77 int len;
78
79 if (!(end = strchr(start, delim[i])))
Cornelia Huck7401a462006-05-24 09:51:05 +020080 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 len = min_t(ptrdiff_t, BUS_ID_SIZE, end - start + 1);
82 strlcpy (bus_ids[i], start, len);
83 argv[i] = bus_ids[i];
84 start = end + 1;
85 }
86
87 ret = ccwgroup_create(cu3088_root_dev, cdrv->driver_id,
88 &cu3088_driver, 2, argv);
89
90 return (ret == 0) ? count : ret;
91}
92
93static DRIVER_ATTR(group, 0200, NULL, group_write);
94
95/* Register-unregister for ctc&lcs */
96int
Jeff Garzike82b0f22006-05-26 21:58:38 -040097register_cu3088_discipline(struct ccwgroup_driver *dcp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070098{
99 int rc;
100
101 if (!dcp)
102 return -EINVAL;
103
104 /* Register discipline.*/
105 rc = ccwgroup_driver_register(dcp);
106 if (rc)
107 return rc;
108
109 rc = driver_create_file(&dcp->driver, &driver_attr_group);
110 if (rc)
111 ccwgroup_driver_unregister(dcp);
Jeff Garzike82b0f22006-05-26 21:58:38 -0400112
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 return rc;
114
115}
116
117void
118unregister_cu3088_discipline(struct ccwgroup_driver *dcp)
119{
120 if (!dcp)
121 return;
122
123 driver_remove_file(&dcp->driver, &driver_attr_group);
124 ccwgroup_driver_unregister(dcp);
125}
126
127static struct ccw_driver cu3088_driver = {
128 .owner = THIS_MODULE,
129 .ids = cu3088_ids,
130 .name = "cu3088",
131 .probe = ccwgroup_probe_ccwdev,
132 .remove = ccwgroup_remove_ccwdev,
133};
134
135/* module setup */
136static int __init
137cu3088_init (void)
138{
139 int rc;
Jeff Garzike82b0f22006-05-26 21:58:38 -0400140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 cu3088_root_dev = s390_root_dev_register("cu3088");
142 if (IS_ERR(cu3088_root_dev))
143 return PTR_ERR(cu3088_root_dev);
144 rc = ccw_driver_register(&cu3088_driver);
145 if (rc)
146 s390_root_dev_unregister(cu3088_root_dev);
147
148 return rc;
149}
150
151static void __exit
152cu3088_exit (void)
153{
154 ccw_driver_unregister(&cu3088_driver);
155 s390_root_dev_unregister(cu3088_root_dev);
156}
157
158MODULE_DEVICE_TABLE(ccw,cu3088_ids);
159MODULE_AUTHOR("Arnd Bergmann <arndb@de.ibm.com>");
160MODULE_LICENSE("GPL");
161
162module_init(cu3088_init);
163module_exit(cu3088_exit);
164
165EXPORT_SYMBOL_GPL(cu3088_type);
166EXPORT_SYMBOL_GPL(register_cu3088_discipline);
167EXPORT_SYMBOL_GPL(unregister_cu3088_discipline);