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" 20#define OSM_VERSION "1.317" 21#define OSM_DESCRIPTION "I2O Bus Adapter OSM" 22 23static struct i2o_driver i2o_bus_driver; 24 25/* Bus OSM class handling definition */ 26static 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 */ 40static int i2o_bus_scan(struct i2o_device *dev) 41{ 42 struct i2o_message *msg; 43 44 msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET); 45 if (IS_ERR(msg)) 46 return -ETIMEDOUT; 47 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); 52 53 return i2o_msg_post_wait(dev->iop, msg, 60); 54}; 55 56/** 57 * i2o_bus_store_scan - Scan the I2O Bus Adapter 58 * @d: device which should be scanned 59 * @attr: device_attribute 60 * @buf: output buffer 61 * @count: buffer size 62 * 63 * Returns count. 64 */ 65static ssize_t i2o_bus_store_scan(struct device *d, 66 struct device_attribute *attr, 67 const char *buf, size_t count) 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 */ 79static 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. 86 * Except when we fail. Then we are sad. 87 * 88 * Returns 0, except when we fail to excel. 89 */ 90static int i2o_bus_probe(struct device *dev) 91{ 92 struct i2o_device *i2o_dev = to_i2o_device(get_device(dev)); 93 int rc; 94 95 rc = device_create_file(dev, &dev_attr_scan); 96 if (rc) 97 goto err_out; 98 99 osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid); 100 101 return 0; 102 103err_out: 104 put_device(dev); 105 return rc; 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 */ 114static 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 */ 128static 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 */ 144static 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 */ 165static void __exit i2o_bus_exit(void) 166{ 167 i2o_driver_unregister(&i2o_bus_driver); 168}; 169 170MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>"); 171MODULE_LICENSE("GPL"); 172MODULE_DESCRIPTION(OSM_DESCRIPTION); 173MODULE_VERSION(OSM_VERSION); 174 175module_init(i2o_bus_init); 176module_exit(i2o_bus_exit); 177