1 files changed, 222 insertions, 0 deletions

diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
new file mode 100644
index 000000000000..d64c1ca4fa76
--- /dev/null
+++ b/drivers/pnp/driver.c
@@ -0,0 +1,222 @@
+/*
+ * driver.c - device id matching, driver model, etc.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+
+#ifdef CONFIG_PNP_DEBUG
+        #define DEBUG
+#else
+        #undef DEBUG
+#endif
+
+#include <linux/pnp.h>
+#include "base.h"
+
+static int compare_func(const char *ida, const char *idb)
+{
+        int i;
+        /* we only need to compare the last 4 chars */
+        for (i=3; i<7; i++)
+        {
+                if (ida[i] != 'X' &&
+                    idb[i] != 'X' &&
+                    toupper(ida[i]) != toupper(idb[i]))
+                        return 0;
+        }
+        return 1;
+}
+
+int compare_pnp_id(struct pnp_id *pos, const char *id)
+{
+        if (!pos || !id || (strlen(id) != 7))
+                return 0;
+        if (memcmp(id,"ANYDEVS",7)==0)
+                return 1;
+        while (pos){
+                if (memcmp(pos->id,id,3)==0)
+                        if (compare_func(pos->id,id)==1)
+                                return 1;
+                pos = pos->next;
+        }
+        return 0;
+}
+
+static const struct pnp_device_id * match_device(struct pnp_driver *drv, struct pnp_dev *dev)
+{
+        const struct pnp_device_id *drv_id = drv->id_table;
+        if (!drv_id)
+                return NULL;
+
+        while (*drv_id->id) {
+                if (compare_pnp_id(dev->id, drv_id->id))
+                        return drv_id;
+                drv_id++;
+        }
+        return NULL;
+}
+
+int pnp_device_attach(struct pnp_dev *pnp_dev)
+{
+        spin_lock(&pnp_lock);
+        if(pnp_dev->status != PNP_READY){
+                spin_unlock(&pnp_lock);
+                return -EBUSY;
+        }
+        pnp_dev->status = PNP_ATTACHED;
+        spin_unlock(&pnp_lock);
+        return 0;
+}
+
+void pnp_device_detach(struct pnp_dev *pnp_dev)
+{
+        spin_lock(&pnp_lock);
+        if (pnp_dev->status == PNP_ATTACHED)
+                pnp_dev->status = PNP_READY;
+        spin_unlock(&pnp_lock);
+        pnp_disable_dev(pnp_dev);
+}
+
+static int pnp_device_probe(struct device *dev)
+{
+        int error;
+        struct pnp_driver *pnp_drv;
+        struct pnp_dev *pnp_dev;
+        const struct pnp_device_id *dev_id = NULL;
+        pnp_dev = to_pnp_dev(dev);
+        pnp_drv = to_pnp_driver(dev->driver);
+
+        pnp_dbg("match found with the PnP device '%s' and the driver '%s'", dev->bus_id,pnp_drv->name);
+
+        error = pnp_device_attach(pnp_dev);
+        if (error < 0)
+                return error;
+
+        if (pnp_dev->active == 0) {
+                if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
+                        error = pnp_activate_dev(pnp_dev);
+                        if (error < 0)
+                                return error;
+                }
+        } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
+                    == PNP_DRIVER_RES_DISABLE) {
+                error = pnp_disable_dev(pnp_dev);
+                if (error < 0)
+                        return error;
+        }
+        error = 0;
+        if (pnp_drv->probe) {
+                dev_id = match_device(pnp_drv, pnp_dev);
+                if (dev_id != NULL)
+                        error = pnp_drv->probe(pnp_dev, dev_id);
+        }
+        if (error >= 0){
+                pnp_dev->driver = pnp_drv;
+                error = 0;
+        } else
+                goto fail;
+        return error;
+
+fail:
+        pnp_device_detach(pnp_dev);
+        return error;
+}
+
+static int pnp_device_remove(struct device *dev)
+{
+        struct pnp_dev * pnp_dev = to_pnp_dev(dev);
+        struct pnp_driver * drv = pnp_dev->driver;
+
+        if (drv) {
+                if (drv->remove)
+                        drv->remove(pnp_dev);
+                pnp_dev->driver = NULL;
+        }
+        pnp_device_detach(pnp_dev);
+        return 0;
+}
+
+static int pnp_bus_match(struct device *dev, struct device_driver *drv)
+{
+        struct pnp_dev * pnp_dev = to_pnp_dev(dev);
+        struct pnp_driver * pnp_drv = to_pnp_driver(drv);
+        if (match_device(pnp_drv, pnp_dev) == NULL)
+                return 0;
+        return 1;
+}
+
+
+struct bus_type pnp_bus_type = {
+        .name   = "pnp",
+        .match  = pnp_bus_match,
+};
+
+
+int pnp_register_driver(struct pnp_driver *drv)
+{
+        int count;
+        struct list_head *pos;
+
+        pnp_dbg("the driver '%s' has been registered", drv->name);
+
+        drv->driver.name = drv->name;
+        drv->driver.bus = &pnp_bus_type;
+        drv->driver.probe = pnp_device_probe;
+        drv->driver.remove = pnp_device_remove;
+
+        count = driver_register(&drv->driver);
+
+        /* get the number of initial matches */
+        if (count >= 0){
+                count = 0;
+                list_for_each(pos,&drv->driver.devices){
+                        count++;
+                }
+        }
+        return count;
+}
+
+void pnp_unregister_driver(struct pnp_driver *drv)
+{
+        driver_unregister(&drv->driver);
+        pnp_dbg("the driver '%s' has been unregistered", drv->name);
+}
+
+/**
+ * pnp_add_id - adds an EISA id to the specified device
+ * @id: pointer to a pnp_id structure
+ * @dev: pointer to the desired device
+ *
+ */
+
+int pnp_add_id(struct pnp_id *id, struct pnp_dev *dev)
+{
+        struct pnp_id *ptr;
+        if (!id)
+                return -EINVAL;
+        if (!dev)
+                return -EINVAL;
+        id->next = NULL;
+        ptr = dev->id;
+        while (ptr && ptr->next)
+                ptr = ptr->next;
+        if (ptr)
+                ptr->next = id;
+        else
+                dev->id = id;
+        return 0;
+}
+
+EXPORT_SYMBOL(pnp_register_driver);
+EXPORT_SYMBOL(pnp_unregister_driver);
+EXPORT_SYMBOL(pnp_add_id);
+EXPORT_SYMBOL(pnp_device_attach);
+EXPORT_SYMBOL(pnp_device_detach);