--- /dev/null
+/*
+ * 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/mutex.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_MUTEX(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;
+}
+
+static void pnp_remove_protocol(struct pnp_protocol *protocol)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&protocol->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
+/**
+ * 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)
+{
+ struct list_head *pos;
+ int nodenum, ret;
+
+ INIT_LIST_HEAD(&protocol->devices);
+ INIT_LIST_HEAD(&protocol->cards);
+ nodenum = 0;
+
+ mutex_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++;
+ }
+ }
+
+ protocol->number = nodenum;
+ dev_set_name(&protocol->dev, "pnp%d", nodenum);
+
+ list_add_tail(&protocol->protocol_list, &pnp_protocols);
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&protocol->dev);
+ if (ret)
+ pnp_remove_protocol(protocol);
+
+ return ret;
+}
+
+/**
+ * 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)
+{
+ pnp_remove_protocol(protocol);
+ 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;
+ }
+}
+
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+ list_del(&pnp_res->list);
+ kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+ struct pnp_resource *pnp_res, *tmp;
+
+ list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+ pnp_free_resource(pnp_res);
+ }
+}
+
+static void pnp_release_device(struct device *dmdev)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+
+ pnp_free_ids(dev);
+ pnp_free_resources(dev);
+ pnp_free_options(dev);
+ kfree(dev);
+}
+
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
+ const char *pnpid)
+{
+ struct pnp_dev *dev;
+ struct pnp_id *dev_id;
+
+ dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ INIT_LIST_HEAD(&dev->resources);
+ INIT_LIST_HEAD(&dev->options);
+ dev->protocol = protocol;
+ dev->number = id;
+ dev->dma_mask = DMA_BIT_MASK(24);
+
+ dev->dev.parent = &dev->protocol->dev;
+ dev->dev.bus = &pnp_bus_type;
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.coherent_dma_mask = dev->dma_mask;
+ dev->dev.release = &pnp_release_device;
+
+ dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
+
+ dev_id = pnp_add_id(dev, pnpid);
+ if (!dev_id) {
+ kfree(dev);
+ return NULL;
+ }
+
+ return dev;
+}
+
+static void pnp_delist_device(struct pnp_dev *dev)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&dev->global_list);
+ list_del(&dev->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
+int __pnp_add_device(struct pnp_dev *dev)
+{
+ int ret;
+
+ pnp_fixup_device(dev);
+ dev->status = PNP_READY;
+
+ mutex_lock(&pnp_lock);
+
+ list_add_tail(&dev->global_list, &pnp_global);
+ list_add_tail(&dev->protocol_list, &dev->protocol->devices);
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&dev->dev);
+ if (ret)
+ pnp_delist_device(dev);
+ else if (dev->protocol->can_wakeup)
+ device_set_wakeup_capable(&dev->dev,
+ dev->protocol->can_wakeup(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)
+{
+ int ret;
+ char buf[128];
+ int len = 0;
+ struct pnp_id *id;
+
+ if (dev->card)
+ return -EINVAL;
+
+ ret = __pnp_add_device(dev);
+ if (ret)
+ return ret;
+
+ buf[0] = '\0';
+ for (id = dev->id; id; id = id->next)
+ len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
+ dev->protocol->name, buf,
+ dev->active ? "active" : "disabled");
+ return 0;
+}
+
+void __pnp_remove_device(struct pnp_dev *dev)
+{
+ pnp_delist_device(dev);
+ device_unregister(&dev->dev);
+}
+
+static int __init pnp_init(void)
+{
+ return bus_register(&pnp_bus_type);
+}
+
+subsys_initcall(pnp_init);
+
+int pnp_debug;
+
+#if defined(CONFIG_PNP_DEBUG_MESSAGES)
+module_param_named(debug, pnp_debug, int, 0644);
+#endif
Code Review / kvmfornfv.git / blobdiff