1 /* 2 * Zorro Driver Services 3 * 4 * Copyright (C) 2003 Geert Uytterhoeven 5 * 6 * Loosely based on drivers/pci/pci-driver.c 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file COPYING in the main directory of this archive 10 * for more details. 11 */ 12 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/zorro.h> 16 17 #include "zorro.h" 18 19 20 /** 21 * zorro_match_device - Tell if a Zorro device structure has a matching 22 * Zorro device id structure 23 * @ids: array of Zorro device id structures to search in 24 * @dev: the Zorro device structure to match against 25 * 26 * Used by a driver to check whether a Zorro device present in the 27 * system is in its list of supported devices. Returns the matching 28 * zorro_device_id structure or %NULL if there is no match. 29 */ 30 31 static const struct zorro_device_id * 32 zorro_match_device(const struct zorro_device_id *ids, 33 const struct zorro_dev *z) 34 { 35 while (ids->id) { 36 if (ids->id == ZORRO_WILDCARD || ids->id == z->id) 37 return ids; 38 ids++; 39 } 40 return NULL; 41 } 42 43 44 static int zorro_device_probe(struct device *dev) 45 { 46 int error = 0; 47 struct zorro_driver *drv = to_zorro_driver(dev->driver); 48 struct zorro_dev *z = to_zorro_dev(dev); 49 50 if (!z->driver && drv->probe) { 51 const struct zorro_device_id *id; 52 53 id = zorro_match_device(drv->id_table, z); 54 if (id) 55 error = drv->probe(z, id); 56 if (error >= 0) { 57 z->driver = drv; 58 error = 0; 59 } 60 } 61 return error; 62 } 63 64 65 static int zorro_device_remove(struct device *dev) 66 { 67 struct zorro_dev *z = to_zorro_dev(dev); 68 struct zorro_driver *drv = to_zorro_driver(dev->driver); 69 70 if (drv) { 71 if (drv->remove) 72 drv->remove(z); 73 z->driver = NULL; 74 } 75 return 0; 76 } 77 78 79 /** 80 * zorro_register_driver - register a new Zorro driver 81 * @drv: the driver structure to register 82 * 83 * Adds the driver structure to the list of registered drivers 84 * Returns zero or a negative error value. 85 */ 86 87 int zorro_register_driver(struct zorro_driver *drv) 88 { 89 /* initialize common driver fields */ 90 drv->driver.name = drv->name; 91 drv->driver.bus = &zorro_bus_type; 92 93 /* register with core */ 94 return driver_register(&drv->driver); 95 } 96 EXPORT_SYMBOL(zorro_register_driver); 97 98 99 /** 100 * zorro_unregister_driver - unregister a zorro driver 101 * @drv: the driver structure to unregister 102 * 103 * Deletes the driver structure from the list of registered Zorro drivers, 104 * gives it a chance to clean up by calling its remove() function for 105 * each device it was responsible for, and marks those devices as 106 * driverless. 107 */ 108 109 void zorro_unregister_driver(struct zorro_driver *drv) 110 { 111 driver_unregister(&drv->driver); 112 } 113 EXPORT_SYMBOL(zorro_unregister_driver); 114 115 116 /** 117 * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro 118 * device id structure 119 * @ids: array of Zorro device id structures to search in 120 * @dev: the Zorro device structure to match against 121 * 122 * Used by the driver core to check whether a Zorro device present in the 123 * system is in a driver's list of supported devices. Returns 1 if 124 * supported, and 0 if there is no match. 125 */ 126 127 static int zorro_bus_match(struct device *dev, struct device_driver *drv) 128 { 129 struct zorro_dev *z = to_zorro_dev(dev); 130 struct zorro_driver *zorro_drv = to_zorro_driver(drv); 131 const struct zorro_device_id *ids = zorro_drv->id_table; 132 133 if (!ids) 134 return 0; 135 136 return !!zorro_match_device(ids, z); 137 } 138 139 static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env) 140 { 141 struct zorro_dev *z; 142 143 if (!dev) 144 return -ENODEV; 145 146 z = to_zorro_dev(dev); 147 if (!z) 148 return -ENODEV; 149 150 if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) || 151 add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) || 152 add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) || 153 add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) 154 return -ENOMEM; 155 156 return 0; 157 } 158 159 struct bus_type zorro_bus_type = { 160 .name = "zorro", 161 .dev_name = "zorro", 162 .dev_groups = zorro_device_attribute_groups, 163 .match = zorro_bus_match, 164 .uevent = zorro_uevent, 165 .probe = zorro_device_probe, 166 .remove = zorro_device_remove, 167 }; 168 EXPORT_SYMBOL(zorro_bus_type); 169 170 171 static int __init zorro_driver_init(void) 172 { 173 return bus_register(&zorro_bus_type); 174 } 175 176 postcore_initcall(zorro_driver_init); 177 178