/* * 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 <linux/dma-mapping.h> #include "base.h" static LIST_HEAD(pnp_protocols); LIST_HEAD(pnp_global); DEFINE_SPINLOCK(pnp_lock); /* * ACPI or PNPBIOS should tell us about all platform devices, so we can * skip some blind probes. ISAPNP typically enumerates only plug-in ISA * devices, not built-in things like COM ports. */ int pnp_platform_devices; EXPORT_SYMBOL(pnp_platform_devices); void *pnp_alloc(long size) { void *result; result = kzalloc(size, GFP_KERNEL); if (!result) { printk(KERN_ERR "pnp: Out of Memory\n"); return NULL; } 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; 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; 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.dma_mask = &dev->dma_mask; dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK; 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) return ret; pnp_interface_attach_device(dev); return 0; } /* * 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) { int ret; if (dev->card) return -EINVAL; dev->dev.parent = &dev->protocol->dev; sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, dev->number); ret = __pnp_add_device(dev); if (ret) return ret; #ifdef CONFIG_PNP_DEBUG { struct pnp_id *id; dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs", dev->protocol->name); for (id = dev->id; id; id = id->next) printk(" %s", id->id); printk(" (%s)\n", dev->active ? "active" : "disabled"); } #endif return 0; } 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); } 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);