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f10378ff ML |
1 | /* |
2 | * Bus Adapter OSM | |
3 | * | |
4 | * Copyright (C) 2005 Markus Lidel <Markus.Lidel@shadowconnect.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * Fixes/additions: | |
12 | * Markus Lidel <Markus.Lidel@shadowconnect.com> | |
13 | * initial version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/i2o.h> | |
18 | ||
19 | #define OSM_NAME "bus-osm" | |
2e1973a3 | 20 | #define OSM_VERSION "1.317" |
f10378ff ML |
21 | #define OSM_DESCRIPTION "I2O Bus Adapter OSM" |
22 | ||
23 | static struct i2o_driver i2o_bus_driver; | |
24 | ||
25 | /* Bus OSM class handling definition */ | |
26 | static struct i2o_class_id i2o_bus_class_id[] = { | |
27 | {I2O_CLASS_BUS_ADAPTER}, | |
28 | {I2O_CLASS_END} | |
29 | }; | |
30 | ||
31 | /** | |
32 | * i2o_bus_scan - Scan the bus for new devices | |
33 | * @dev: I2O device of the bus, which should be scanned | |
34 | * | |
35 | * Scans the bus dev for new / removed devices. After the scan a new LCT | |
36 | * will be fetched automatically. | |
37 | * | |
38 | * Returns 0 on success or negative error code on failure. | |
39 | */ | |
40 | static int i2o_bus_scan(struct i2o_device *dev) | |
41 | { | |
a1a5ea70 | 42 | struct i2o_message *msg; |
f10378ff | 43 | |
a1a5ea70 ML |
44 | msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); |
45 | if (IS_ERR(msg)) | |
f10378ff ML |
46 | return -ETIMEDOUT; |
47 | ||
a1a5ea70 ML |
48 | msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0); |
49 | msg->u.head[1] = | |
50 | cpu_to_le32(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data. | |
51 | tid); | |
f10378ff | 52 | |
a1a5ea70 | 53 | return i2o_msg_post_wait(dev->iop, msg, 60); |
f10378ff ML |
54 | }; |
55 | ||
56 | /** | |
57 | * i2o_bus_store_scan - Scan the I2O Bus Adapter | |
58 | * @d: device which should be scanned | |
d9489fb6 RD |
59 | * @attr: device_attribute |
60 | * @buf: output buffer | |
61 | * @count: buffer size | |
f10378ff ML |
62 | * |
63 | * Returns count. | |
64 | */ | |
a1a5ea70 ML |
65 | static ssize_t i2o_bus_store_scan(struct device *d, |
66 | struct device_attribute *attr, | |
67 | const char *buf, size_t count) | |
f10378ff ML |
68 | { |
69 | struct i2o_device *i2o_dev = to_i2o_device(d); | |
70 | int rc; | |
71 | ||
72 | if ((rc = i2o_bus_scan(i2o_dev))) | |
73 | osm_warn("bus scan failed %d\n", rc); | |
74 | ||
75 | return count; | |
76 | } | |
77 | ||
78 | /* Bus Adapter OSM device attributes */ | |
79 | static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan); | |
80 | ||
81 | /** | |
82 | * i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it | |
83 | * @dev: device to verify if it is a I2O Bus Adapter device | |
84 | * | |
85 | * Because we want all Bus Adapters always return 0. | |
6b5f2967 | 86 | * Except when we fail. Then we are sad. |
f10378ff | 87 | * |
6b5f2967 | 88 | * Returns 0, except when we fail to excel. |
f10378ff ML |
89 | */ |
90 | static int i2o_bus_probe(struct device *dev) | |
91 | { | |
92 | struct i2o_device *i2o_dev = to_i2o_device(get_device(dev)); | |
6b5f2967 | 93 | int rc; |
f10378ff | 94 | |
6b5f2967 JG |
95 | rc = device_create_file(dev, &dev_attr_scan); |
96 | if (rc) | |
97 | goto err_out; | |
f10378ff ML |
98 | |
99 | osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid); | |
100 | ||
101 | return 0; | |
6b5f2967 JG |
102 | |
103 | err_out: | |
104 | put_device(dev); | |
105 | return rc; | |
f10378ff ML |
106 | }; |
107 | ||
108 | /** | |
109 | * i2o_bus_remove - remove the I2O Bus Adapter device from the system again | |
110 | * @dev: I2O Bus Adapter device which should be removed | |
111 | * | |
112 | * Always returns 0. | |
113 | */ | |
114 | static int i2o_bus_remove(struct device *dev) | |
115 | { | |
116 | struct i2o_device *i2o_dev = to_i2o_device(dev); | |
117 | ||
118 | device_remove_file(dev, &dev_attr_scan); | |
119 | ||
120 | put_device(dev); | |
121 | ||
122 | osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid); | |
123 | ||
124 | return 0; | |
125 | }; | |
126 | ||
127 | /* Bus Adapter OSM driver struct */ | |
128 | static struct i2o_driver i2o_bus_driver = { | |
129 | .name = OSM_NAME, | |
130 | .classes = i2o_bus_class_id, | |
131 | .driver = { | |
132 | .probe = i2o_bus_probe, | |
133 | .remove = i2o_bus_remove, | |
134 | }, | |
135 | }; | |
136 | ||
137 | /** | |
138 | * i2o_bus_init - Bus Adapter OSM initialization function | |
139 | * | |
140 | * Only register the Bus Adapter OSM in the I2O core. | |
141 | * | |
142 | * Returns 0 on success or negative error code on failure. | |
143 | */ | |
144 | static int __init i2o_bus_init(void) | |
145 | { | |
146 | int rc; | |
147 | ||
148 | printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n"); | |
149 | ||
150 | /* Register Bus Adapter OSM into I2O core */ | |
151 | rc = i2o_driver_register(&i2o_bus_driver); | |
152 | if (rc) { | |
153 | osm_err("Could not register Bus Adapter OSM\n"); | |
154 | return rc; | |
155 | } | |
156 | ||
157 | return 0; | |
158 | }; | |
159 | ||
160 | /** | |
161 | * i2o_bus_exit - Bus Adapter OSM exit function | |
162 | * | |
163 | * Unregisters Bus Adapter OSM from I2O core. | |
164 | */ | |
165 | static void __exit i2o_bus_exit(void) | |
166 | { | |
167 | i2o_driver_unregister(&i2o_bus_driver); | |
168 | }; | |
169 | ||
170 | MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>"); | |
171 | MODULE_LICENSE("GPL"); | |
172 | MODULE_DESCRIPTION(OSM_DESCRIPTION); | |
173 | MODULE_VERSION(OSM_VERSION); | |
174 | ||
175 | module_init(i2o_bus_init); | |
176 | module_exit(i2o_bus_exit); |