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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/pnp/core.c
downloadlinux-linaro-stable-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/pnp/core.c')
-rw-r--r--drivers/pnp/core.c180
1 files changed, 180 insertions, 0 deletions
diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c
new file mode 100644
index 000000000000..deed92459bc5
--- /dev/null
+++ b/drivers/pnp/core.c
@@ -0,0 +1,180 @@
+/*
+ * 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
+ */
+
+void pnp_remove_device(struct pnp_dev *dev)
+{
+ if (!dev || dev->card)
+ return;
+ __pnp_remove_device(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);
+
+EXPORT_SYMBOL(pnp_register_protocol);
+EXPORT_SYMBOL(pnp_unregister_protocol);
+EXPORT_SYMBOL(pnp_add_device);
+EXPORT_SYMBOL(pnp_remove_device);