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 "$Rev$"
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 __iomem *msg;
45 m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
46 if (m == I2O_QUEUE_EMPTY)
49 writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
50 writel(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.tid,
53 return i2o_msg_post_wait(dev->iop, m, 60);
57 * i2o_bus_store_scan - Scan the I2O Bus Adapter
58 * @d: device which should be scanned
62 static ssize_t i2o_bus_store_scan(struct device *d, struct device_attribute *attr, const char *buf,
65 struct i2o_device *i2o_dev = to_i2o_device(d);
68 if ((rc = i2o_bus_scan(i2o_dev)))
69 osm_warn("bus scan failed %d\n", rc);
74 /* Bus Adapter OSM device attributes */
75 static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);
78 * i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it
79 * @dev: device to verify if it is a I2O Bus Adapter device
81 * Because we want all Bus Adapters always return 0.
85 static int i2o_bus_probe(struct device *dev)
87 struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
89 device_create_file(dev, &dev_attr_scan);
91 osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);
97 * i2o_bus_remove - remove the I2O Bus Adapter device from the system again
98 * @dev: I2O Bus Adapter device which should be removed
102 static int i2o_bus_remove(struct device *dev)
104 struct i2o_device *i2o_dev = to_i2o_device(dev);
106 device_remove_file(dev, &dev_attr_scan);
110 osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
115 /* Bus Adapter OSM driver struct */
116 static struct i2o_driver i2o_bus_driver = {
118 .classes = i2o_bus_class_id,
120 .probe = i2o_bus_probe,
121 .remove = i2o_bus_remove,
126 * i2o_bus_init - Bus Adapter OSM initialization function
128 * Only register the Bus Adapter OSM in the I2O core.
130 * Returns 0 on success or negative error code on failure.
132 static int __init i2o_bus_init(void)
136 printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
138 /* Register Bus Adapter OSM into I2O core */
139 rc = i2o_driver_register(&i2o_bus_driver);
141 osm_err("Could not register Bus Adapter OSM\n");
149 * i2o_bus_exit - Bus Adapter OSM exit function
151 * Unregisters Bus Adapter OSM from I2O core.
153 static void __exit i2o_bus_exit(void)
155 i2o_driver_unregister(&i2o_bus_driver);
158 MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
159 MODULE_LICENSE("GPL");
160 MODULE_DESCRIPTION(OSM_DESCRIPTION);
161 MODULE_VERSION(OSM_VERSION);
163 module_init(i2o_bus_init);
164 module_exit(i2o_bus_exit);