/* * core.c - contains all core device and protocol registration functions * * Copyright 2002 Adam Belay <ambx1@neo.rr.com> * */ #include <linux/pnp.h> #include <linux/types.h> #include <linux/list.h> #include <linux/device.h> #include <linux/module.h> #include <linux/init.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/errno.h> #include "base.h" static LIST_HEAD(pnp_protocols); LIST_HEAD(pnp_global); DEFINE_SPINLOCK(pnp_lock); void *pnp_alloc(long size) { void *result; result = kmalloc(size, GFP_KERNEL); if (!result){ printk(KERN_ERR "pnp: Out of Memory\n"); return NULL; } memset(result, 0, size); return result; } /** * pnp_protocol_register - adds a pnp protocol to the pnp layer * @protocol: pointer to the corresponding pnp_protocol structure * * Ex protocols: ISAPNP, PNPBIOS, etc */ int pnp_register_protocol(struct pnp_protocol *protocol) { int nodenum; struct list_head * pos; if (!protocol) return -EINVAL; INIT_LIST_HEAD(&protocol->devices); INIT_LIST_HEAD(&protocol->cards); nodenum = 0; spin_lock(&pnp_lock); /* assign the lowest unused number */ list_for_each(pos,&pnp_protocols) { struct pnp_protocol * cur = to_pnp_protocol(pos); if (cur->number == nodenum){ pos = &pnp_protocols; nodenum++; } } list_add_tail(&protocol->protocol_list, &pnp_protocols); spin_unlock(&pnp_lock); protocol->number = nodenum; sprintf(protocol->dev.bus_id, "pnp%d", nodenum); return device_register(&protocol->dev); } /** * pnp_protocol_unregister - removes a pnp protocol from the pnp layer * @protocol: pointer to the corresponding pnp_protocol structure * */ void pnp_unregister_protocol(struct pnp_protocol *protocol) { spin_lock(&pnp_lock); list_del(&protocol->protocol_list); spin_unlock(&pnp_lock); device_unregister(&protocol->dev); } static void pnp_free_ids(struct pnp_dev *dev) { struct pnp_id * id; struct pnp_id * next; if (!dev) return; id = dev->id; while (id) { next = id->next; kfree(id); id = next; } } static void pnp_release_device(struct device *dmdev) { struct pnp_dev * dev = to_pnp_dev(dmdev); pnp_free_option(dev->independent); pnp_free_option(dev->dependent); pnp_free_ids(dev); kfree(dev); } int __pnp_add_device(struct pnp_dev *dev) { int ret; pnp_fixup_device(dev); dev->dev.bus = &pnp_bus_type; dev->dev.release = &pnp_release_device; dev->status = PNP_READY; spin_lock(&pnp_lock); list_add_tail(&dev->global_list, &pnp_global); list_add_tail(&dev->protocol_list, &dev->protocol->devices); spin_unlock(&pnp_lock); ret = device_register(&dev->dev); if (ret == 0) pnp_interface_attach_device(dev); return ret; } /* * pnp_add_device - adds a pnp device to the pnp layer * @dev: pointer to dev to add * * adds to driver model, name database, fixups, interface, etc. */ int pnp_add_device(struct pnp_dev *dev) { if (!dev || !dev->protocol || dev->card) return -EINVAL; dev->dev.parent = &dev->protocol->dev; sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, dev->number); return __pnp_add_device(dev); } void __pnp_remove_device(struct pnp_dev *dev) { spin_lock(&pnp_lock); list_del(&dev->global_list); list_del(&dev->protocol_list); spin_unlock(&pnp_lock); device_unregister(&dev->dev); } /** * pnp_remove_device - removes a pnp device from the pnp layer * @dev: pointer to dev to add * * this function will free all mem used by dev */ #if 0 void pnp_remove_device(struct pnp_dev *dev) { if (!dev || dev->card) return; __pnp_remove_device(dev); } #endif /* 0 */ static int __init pnp_init(void) { printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n"); return bus_register(&pnp_bus_type); } subsys_initcall(pnp_init); #if 0 EXPORT_SYMBOL(pnp_register_protocol); EXPORT_SYMBOL(pnp_unregister_protocol); EXPORT_SYMBOL(pnp_add_device); EXPORT_SYMBOL(pnp_remove_device); #endif /* 0 */