--- /dev/null
+/*
+ * driver.c - device id matching, driver model, etc.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#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)
+{
+ mutex_lock(&pnp_lock);
+ if (pnp_dev->status != PNP_READY) {
+ mutex_unlock(&pnp_lock);
+ return -EBUSY;
+ }
+ pnp_dev->status = PNP_ATTACHED;
+ mutex_unlock(&pnp_lock);
+ return 0;
+}
+
+void pnp_device_detach(struct pnp_dev *pnp_dev)
+{
+ mutex_lock(&pnp_lock);
+ if (pnp_dev->status == PNP_ATTACHED)
+ pnp_dev->status = PNP_READY;
+ mutex_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);
+
+ 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 void pnp_device_shutdown(struct device *dev)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *drv = pnp_dev->driver;
+
+ if (drv && drv->shutdown)
+ drv->shutdown(pnp_dev);
+}
+
+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;
+}
+
+static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
+ int error;
+
+ if (!pnp_drv)
+ return 0;
+
+ if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
+ error = pnp_drv->driver.pm->suspend(dev);
+ suspend_report_result(pnp_drv->driver.pm->suspend, error);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->suspend) {
+ error = pnp_drv->suspend(pnp_dev, state);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_disable(pnp_dev)) {
+ error = pnp_stop_dev(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_suspend(pnp_dev))
+ pnp_dev->protocol->suspend(pnp_dev, state);
+ return 0;
+}
+
+static int pnp_bus_suspend(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_SUSPEND);
+}
+
+static int pnp_bus_freeze(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_FREEZE);
+}
+
+static int pnp_bus_poweroff(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
+}
+
+static int pnp_bus_resume(struct device *dev)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
+ int error;
+
+ if (!pnp_drv)
+ return 0;
+
+ if (pnp_dev->protocol->resume) {
+ error = pnp_dev->protocol->resume(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_write(pnp_dev)) {
+ error = pnp_start_dev(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
+ error = pnp_drv->driver.pm->resume(dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->resume) {
+ error = pnp_drv->resume(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
+ /* Suspend callbacks */
+ .suspend = pnp_bus_suspend,
+ .resume = pnp_bus_resume,
+ /* Hibernate callbacks */
+ .freeze = pnp_bus_freeze,
+ .thaw = pnp_bus_resume,
+ .poweroff = pnp_bus_poweroff,
+ .restore = pnp_bus_resume,
+};
+
+struct bus_type pnp_bus_type = {
+ .name = "pnp",
+ .match = pnp_bus_match,
+ .probe = pnp_device_probe,
+ .remove = pnp_device_remove,
+ .shutdown = pnp_device_shutdown,
+ .pm = &pnp_bus_dev_pm_ops,
+ .dev_groups = pnp_dev_groups,
+};
+
+int pnp_register_driver(struct pnp_driver *drv)
+{
+ drv->driver.name = drv->name;
+ drv->driver.bus = &pnp_bus_type;
+
+ return driver_register(&drv->driver);
+}
+
+void pnp_unregister_driver(struct pnp_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+
+/**
+ * pnp_add_id - adds an EISA id to the specified device
+ * @dev: pointer to the desired device
+ * @id: pointer to an EISA id string
+ */
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
+{
+ struct pnp_id *dev_id, *ptr;
+
+ dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+ if (!dev_id)
+ return NULL;
+
+ dev_id->id[0] = id[0];
+ dev_id->id[1] = id[1];
+ dev_id->id[2] = id[2];
+ dev_id->id[3] = tolower(id[3]);
+ dev_id->id[4] = tolower(id[4]);
+ dev_id->id[5] = tolower(id[5]);
+ dev_id->id[6] = tolower(id[6]);
+ dev_id->id[7] = '\0';
+
+ dev_id->next = NULL;
+ ptr = dev->id;
+ while (ptr && ptr->next)
+ ptr = ptr->next;
+ if (ptr)
+ ptr->next = dev_id;
+ else
+ dev->id = dev_id;
+
+ return dev_id;
+}
+
+EXPORT_SYMBOL(pnp_register_driver);
+EXPORT_SYMBOL(pnp_unregister_driver);
+EXPORT_SYMBOL(pnp_device_attach);
+EXPORT_SYMBOL(pnp_device_detach);
Code Review / kvmfornfv.git / blobdiff