mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-09 14:16:39 +07:00
181 lines
3.8 KiB
C
181 lines
3.8 KiB
C
|
/*
|
||
|
* 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);
|