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 18 /** 19 * zorro_match_device - Tell if a Zorro device structure has a matching 20 * Zorro device id structure 21 * @ids: array of Zorro device id structures to search in 22 * @dev: the Zorro device structure to match against 23 * 24 * Used by a driver to check whether a Zorro device present in the 25 * system is in its list of supported devices. Returns the matching 26 * zorro_device_id structure or %NULL if there is no match. 27 */ 28 29 const struct zorro_device_id * 30 zorro_match_device(const struct zorro_device_id *ids, 31 const struct zorro_dev *z) 32 { 33 while (ids->id) { 34 if (ids->id == ZORRO_WILDCARD || ids->id == z->id) 35 return ids; 36 ids++; 37 } 38 return NULL; 39 } 40 EXPORT_SYMBOL(zorro_match_device); 41 42 43 static int zorro_device_probe(struct device *dev) 44 { 45 int error = 0; 46 struct zorro_driver *drv = to_zorro_driver(dev->driver); 47 struct zorro_dev *z = to_zorro_dev(dev); 48 49 if (!z->driver && drv->probe) { 50 const struct zorro_device_id *id; 51 52 id = zorro_match_device(drv->id_table, z); 53 if (id) 54 error = drv->probe(z, id); 55 if (error >= 0) { 56 z->driver = drv; 57 error = 0; 58 } 59 } 60 return error; 61 } 62 63 64 static int zorro_device_remove(struct device *dev) 65 { 66 struct zorro_dev *z = to_zorro_dev(dev); 67 struct zorro_driver *drv = to_zorro_driver(dev->driver); 68 69 if (drv) { 70 if (drv->remove) 71 drv->remove(z); 72 z->driver = NULL; 73 } 74 return 0; 75 } 76 77 78 /** 79 * zorro_register_driver - register a new Zorro driver 80 * @drv: the driver structure to register 81 * 82 * Adds the driver structure to the list of registered drivers 83 * Returns zero or a negative error value. 84 */ 85 86 int zorro_register_driver(struct zorro_driver *drv) 87 { 88 /* initialize common driver fields */ 89 drv->driver.name = drv->name; 90 drv->driver.bus = &zorro_bus_type; 91 92 /* register with core */ 93 return driver_register(&drv->driver); 94 } 95 EXPORT_SYMBOL(zorro_register_driver); 96 97 98 /** 99 * zorro_unregister_driver - unregister a zorro driver 100 * @drv: the driver structure to unregister 101 * 102 * Deletes the driver structure from the list of registered Zorro drivers, 103 * gives it a chance to clean up by calling its remove() function for 104 * each device it was responsible for, and marks those devices as 105 * driverless. 106 */ 107 108 void zorro_unregister_driver(struct zorro_driver *drv) 109 { 110 driver_unregister(&drv->driver); 111 } 112 EXPORT_SYMBOL(zorro_unregister_driver); 113 114 115 /** 116 * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro 117 * device id structure 118 * @ids: array of Zorro device id structures to search in 119 * @dev: the Zorro device structure to match against 120 * 121 * Used by a driver to check whether a Zorro device present in the 122 * system is in its list of supported devices.Returns the matching 123 * zorro_device_id structure or %NULL if there is no match. 124 */ 125 126 static int zorro_bus_match(struct device *dev, struct device_driver *drv) 127 { 128 struct zorro_dev *z = to_zorro_dev(dev); 129 struct zorro_driver *zorro_drv = to_zorro_driver(drv); 130 const struct zorro_device_id *ids = zorro_drv->id_table; 131 132 if (!ids) 133 return 0; 134 135 while (ids->id) { 136 if (ids->id == ZORRO_WILDCARD || ids->id == z->id) 137 return 1; 138 ids++; 139 } 140 return 0; 141 } 142 143 static int zorro_uevent(struct device *dev, struct kobj_uevent_env *env) 144 { 145 struct zorro_dev *z; 146 147 if (!dev) 148 return -ENODEV; 149 150 z = to_zorro_dev(dev); 151 if (!z) 152 return -ENODEV; 153 154 if (add_uevent_var(env, "ZORRO_ID=%08X", z->id) || 155 add_uevent_var(env, "ZORRO_SLOT_NAME=%s", dev_name(dev)) || 156 add_uevent_var(env, "ZORRO_SLOT_ADDR=%04X", z->slotaddr) || 157 add_uevent_var(env, "MODALIAS=" ZORRO_DEVICE_MODALIAS_FMT, z->id)) 158 return -ENOMEM; 159 160 return 0; 161 } 162 163 struct bus_type zorro_bus_type = { 164 .name = "zorro", 165 .dev_name = "zorro", 166 .match = zorro_bus_match, 167 .uevent = zorro_uevent, 168 .probe = zorro_device_probe, 169 .remove = zorro_device_remove, 170 }; 171 EXPORT_SYMBOL(zorro_bus_type); 172 173 174 static int __init zorro_driver_init(void) 175 { 176 return bus_register(&zorro_bus_type); 177 } 178 179 postcore_initcall(zorro_driver_init); 180 181