177 lines
4.0 KiB
C
177 lines
4.0 KiB
C
/*
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* Bus Adapter OSM
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*
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* Copyright (C) 2005 Markus Lidel <Markus.Lidel@shadowconnect.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* Fixes/additions:
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* Markus Lidel <Markus.Lidel@shadowconnect.com>
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* initial version.
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*/
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#include <linux/module.h>
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#include <linux/i2o.h>
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#define OSM_NAME "bus-osm"
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#define OSM_VERSION "1.317"
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#define OSM_DESCRIPTION "I2O Bus Adapter OSM"
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static struct i2o_driver i2o_bus_driver;
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/* Bus OSM class handling definition */
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static struct i2o_class_id i2o_bus_class_id[] = {
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{I2O_CLASS_BUS_ADAPTER},
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{I2O_CLASS_END}
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};
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/**
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* i2o_bus_scan - Scan the bus for new devices
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* @dev: I2O device of the bus, which should be scanned
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*
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* Scans the bus dev for new / removed devices. After the scan a new LCT
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* will be fetched automatically.
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*
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* Returns 0 on success or negative error code on failure.
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*/
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static int i2o_bus_scan(struct i2o_device *dev)
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{
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struct i2o_message *msg;
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msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
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if (IS_ERR(msg))
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return -ETIMEDOUT;
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msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
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msg->u.head[1] =
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cpu_to_le32(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.
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tid);
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return i2o_msg_post_wait(dev->iop, msg, 60);
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};
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/**
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* i2o_bus_store_scan - Scan the I2O Bus Adapter
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* @d: device which should be scanned
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* @attr: device_attribute
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* @buf: output buffer
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* @count: buffer size
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*
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* Returns count.
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*/
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static ssize_t i2o_bus_store_scan(struct device *d,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct i2o_device *i2o_dev = to_i2o_device(d);
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int rc;
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if ((rc = i2o_bus_scan(i2o_dev)))
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osm_warn("bus scan failed %d\n", rc);
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return count;
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}
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/* Bus Adapter OSM device attributes */
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static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);
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/**
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* i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it
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* @dev: device to verify if it is a I2O Bus Adapter device
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*
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* Because we want all Bus Adapters always return 0.
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* Except when we fail. Then we are sad.
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*
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* Returns 0, except when we fail to excel.
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*/
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static int i2o_bus_probe(struct device *dev)
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{
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struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
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int rc;
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rc = device_create_file(dev, &dev_attr_scan);
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if (rc)
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goto err_out;
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osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);
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return 0;
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err_out:
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put_device(dev);
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return rc;
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};
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/**
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* i2o_bus_remove - remove the I2O Bus Adapter device from the system again
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* @dev: I2O Bus Adapter device which should be removed
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*
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* Always returns 0.
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*/
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static int i2o_bus_remove(struct device *dev)
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{
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struct i2o_device *i2o_dev = to_i2o_device(dev);
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device_remove_file(dev, &dev_attr_scan);
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put_device(dev);
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osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
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return 0;
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};
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/* Bus Adapter OSM driver struct */
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static struct i2o_driver i2o_bus_driver = {
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.name = OSM_NAME,
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.classes = i2o_bus_class_id,
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.driver = {
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.probe = i2o_bus_probe,
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.remove = i2o_bus_remove,
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},
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};
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/**
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* i2o_bus_init - Bus Adapter OSM initialization function
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*
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* Only register the Bus Adapter OSM in the I2O core.
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*
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* Returns 0 on success or negative error code on failure.
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*/
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static int __init i2o_bus_init(void)
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{
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int rc;
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printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
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/* Register Bus Adapter OSM into I2O core */
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rc = i2o_driver_register(&i2o_bus_driver);
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if (rc) {
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osm_err("Could not register Bus Adapter OSM\n");
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return rc;
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}
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return 0;
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};
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/**
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* i2o_bus_exit - Bus Adapter OSM exit function
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*
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* Unregisters Bus Adapter OSM from I2O core.
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*/
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static void __exit i2o_bus_exit(void)
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{
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i2o_driver_unregister(&i2o_bus_driver);
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};
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MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION(OSM_DESCRIPTION);
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MODULE_VERSION(OSM_VERSION);
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module_init(i2o_bus_init);
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module_exit(i2o_bus_exit);
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