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 41 42 static int zorro_device_probe(struct device *dev) 43 { 44 int error = 0; 45 struct zorro_driver *drv = to_zorro_driver(dev->driver); 46 struct zorro_dev *z = to_zorro_dev(dev); 47 48 if (!z->driver && drv->probe) { 49 const struct zorro_device_id *id; 50 51 id = zorro_match_device(drv->id_table, z); 52 if (id) 53 error = drv->probe(z, id); 54 if (error >= 0) { 55 z->driver = drv; 56 error = 0; 57 } 58 } 59 return error; 60 } 61 62 63 /** 64 * zorro_register_driver - register a new Zorro driver 65 * @drv: the driver structure to register 66 * 67 * Adds the driver structure to the list of registered drivers 68 * Returns zero or a negative error value. 69 */ 70 71 int zorro_register_driver(struct zorro_driver *drv) 72 { 73 /* initialize common driver fields */ 74 drv->driver.name = drv->name; 75 drv->driver.bus = &zorro_bus_type; 76 77 /* register with core */ 78 return driver_register(&drv->driver); 79 } 80 81 82 /** 83 * zorro_unregister_driver - unregister a zorro driver 84 * @drv: the driver structure to unregister 85 * 86 * Deletes the driver structure from the list of registered Zorro drivers, 87 * gives it a chance to clean up by calling its remove() function for 88 * each device it was responsible for, and marks those devices as 89 * driverless. 90 */ 91 92 void zorro_unregister_driver(struct zorro_driver *drv) 93 { 94 driver_unregister(&drv->driver); 95 } 96 97 98 /** 99 * zorro_bus_match - Tell if a Zorro device structure has a matching Zorro 100 * device id structure 101 * @ids: array of Zorro device id structures to search in 102 * @dev: the Zorro device structure to match against 103 * 104 * Used by a driver to check whether a Zorro device present in the 105 * system is in its list of supported devices.Returns the matching 106 * zorro_device_id structure or %NULL if there is no match. 107 */ 108 109 static int zorro_bus_match(struct device *dev, struct device_driver *drv) 110 { 111 struct zorro_dev *z = to_zorro_dev(dev); 112 struct zorro_driver *zorro_drv = to_zorro_driver(drv); 113 const struct zorro_device_id *ids = zorro_drv->id_table; 114 115 if (!ids) 116 return 0; 117 118 while (ids->id) { 119 if (ids->id == ZORRO_WILDCARD || ids->id == z->id) 120 return 1; 121 ids++; 122 } 123 return 0; 124 } 125 126 127 struct bus_type zorro_bus_type = { 128 .name = "zorro", 129 .match = zorro_bus_match, 130 .probe = zorro_device_probe, 131 }; 132 133 134 static int __init zorro_driver_init(void) 135 { 136 return bus_register(&zorro_bus_type); 137 } 138 139 postcore_initcall(zorro_driver_init); 140 141 EXPORT_SYMBOL(zorro_match_device); 142 EXPORT_SYMBOL(zorro_register_driver); 143 EXPORT_SYMBOL(zorro_unregister_driver); 144 EXPORT_SYMBOL(zorro_dev_driver); 145 EXPORT_SYMBOL(zorro_bus_type); 146