4 * Copyright (C) 2005 Markus Lidel <Markus.Lidel@shadowconnect.com>
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.
12 * Markus Lidel <Markus.Lidel@shadowconnect.com>
16 #include <linux/module.h>
17 #include <linux/i2o.h>
19 #define OSM_NAME "bus-osm"
20 #define OSM_VERSION "1.317"
21 #define OSM_DESCRIPTION "I2O Bus Adapter OSM"
23 static struct i2o_driver i2o_bus_driver;
25 /* Bus OSM class handling definition */
26 static struct i2o_class_id i2o_bus_class_id[] = {
27 {I2O_CLASS_BUS_ADAPTER},
32 * i2o_bus_scan - Scan the bus for new devices
33 * @dev: I2O device of the bus, which should be scanned
35 * Scans the bus dev for new / removed devices. After the scan a new LCT
36 * will be fetched automatically.
38 * Returns 0 on success or negative error code on failure.
40 static int i2o_bus_scan(struct i2o_device *dev)
42 struct i2o_message *msg;
44 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
48 msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
50 cpu_to_le32(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.
53 return i2o_msg_post_wait(dev->iop, msg, 60);
57 * i2o_bus_store_scan - Scan the I2O Bus Adapter
58 * @d: device which should be scanned
59 * @attr: device_attribute
65 static ssize_t i2o_bus_store_scan(struct device *d,
66 struct device_attribute *attr,
67 const char *buf, size_t count)
69 struct i2o_device *i2o_dev = to_i2o_device(d);
72 if ((rc = i2o_bus_scan(i2o_dev)))
73 osm_warn("bus scan failed %d\n", rc);
78 /* Bus Adapter OSM device attributes */
79 static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);
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
85 * Because we want all Bus Adapters always return 0.
86 * Except when we fail. Then we are sad.
88 * Returns 0, except when we fail to excel.
90 static int i2o_bus_probe(struct device *dev)
92 struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
95 rc = device_create_file(dev, &dev_attr_scan);
99 osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);
109 * i2o_bus_remove - remove the I2O Bus Adapter device from the system again
110 * @dev: I2O Bus Adapter device which should be removed
114 static int i2o_bus_remove(struct device *dev)
116 struct i2o_device *i2o_dev = to_i2o_device(dev);
118 device_remove_file(dev, &dev_attr_scan);
122 osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
127 /* Bus Adapter OSM driver struct */
128 static struct i2o_driver i2o_bus_driver = {
130 .classes = i2o_bus_class_id,
132 .probe = i2o_bus_probe,
133 .remove = i2o_bus_remove,
138 * i2o_bus_init - Bus Adapter OSM initialization function
140 * Only register the Bus Adapter OSM in the I2O core.
142 * Returns 0 on success or negative error code on failure.
144 static int __init i2o_bus_init(void)
148 printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
150 /* Register Bus Adapter OSM into I2O core */
151 rc = i2o_driver_register(&i2o_bus_driver);
153 osm_err("Could not register Bus Adapter OSM\n");
161 * i2o_bus_exit - Bus Adapter OSM exit function
163 * Unregisters Bus Adapter OSM from I2O core.
165 static void __exit i2o_bus_exit(void)
167 i2o_driver_unregister(&i2o_bus_driver);
170 MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
171 MODULE_LICENSE("GPL");
172 MODULE_DESCRIPTION(OSM_DESCRIPTION);
173 MODULE_VERSION(OSM_VERSION);
175 module_init(i2o_bus_init);
176 module_exit(i2o_bus_exit);