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path: root/drivers/pnp/driver.c
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-rw-r--r--drivers/pnp/driver.c222
1 files changed, 222 insertions, 0 deletions
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
new file mode 100644
index 00000000000..d64c1ca4fa7
--- /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);