317 lines
6.4 KiB
C
317 lines
6.4 KiB
C
/*
|
|
* 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);
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (pnp_dev->active &&
|
|
(!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))
|
|
pnp_disable_dev(pnp_dev);
|
|
|
|
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);
|