* core.c - contains all core device and protocol registration functions
*
* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
- *
*/
#include <linux/pnp.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/dma-mapping.h>
#include "base.h"
-
static LIST_HEAD(pnp_protocols);
LIST_HEAD(pnp_global);
DEFINE_SPINLOCK(pnp_lock);
+/*
+ * ACPI or PNPBIOS should tell us about all platform devices, so we can
+ * skip some blind probes. ISAPNP typically enumerates only plug-in ISA
+ * devices, not built-in things like COM ports.
+ */
+int pnp_platform_devices;
+EXPORT_SYMBOL(pnp_platform_devices);
+
void *pnp_alloc(long size)
{
void *result;
- result = kmalloc(size, GFP_KERNEL);
- if (!result){
+ result = kzalloc(size, GFP_KERNEL);
+ if (!result) {
printk(KERN_ERR "pnp: Out of Memory\n");
return NULL;
}
- memset(result, 0, size);
return result;
}
*
* Ex protocols: ISAPNP, PNPBIOS, etc
*/
-
int pnp_register_protocol(struct pnp_protocol *protocol)
{
int nodenum;
- struct list_head * pos;
-
- if (!protocol)
- return -EINVAL;
+ struct list_head *pos;
INIT_LIST_HEAD(&protocol->devices);
INIT_LIST_HEAD(&protocol->cards);
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){
+ list_for_each(pos, &pnp_protocols) {
+ struct pnp_protocol *cur = to_pnp_protocol(pos);
+ if (cur->number == nodenum) {
pos = &pnp_protocols;
nodenum++;
}
/**
* 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)
{
device_unregister(&protocol->dev);
}
-
static void pnp_free_ids(struct pnp_dev *dev)
{
- struct pnp_id * id;
- struct pnp_id * next;
- if (!dev)
- return;
+ struct pnp_id *id;
+ struct pnp_id *next;
+
id = dev->id;
while (id) {
next = id->next;
}
}
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+ list_del(&pnp_res->list);
+ kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+ struct pnp_resource *pnp_res, *tmp;
+
+ list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+ pnp_free_resource(pnp_res);
+ }
+}
+
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);
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+
pnp_free_ids(dev);
+ pnp_free_resources(dev);
+ pnp_free_options(dev);
kfree(dev);
}
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id, char *pnpid)
+{
+ struct pnp_dev *dev;
+ struct pnp_id *dev_id;
+
+ dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ INIT_LIST_HEAD(&dev->resources);
+ INIT_LIST_HEAD(&dev->options);
+ dev->protocol = protocol;
+ dev->number = id;
+ dev->dma_mask = DMA_24BIT_MASK;
+
+ dev->dev.parent = &dev->protocol->dev;
+ dev->dev.bus = &pnp_bus_type;
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.coherent_dma_mask = dev->dma_mask;
+ dev->dev.release = &pnp_release_device;
+
+ sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,
+ dev->number);
+
+ dev_id = pnp_add_id(dev, pnpid);
+ if (!dev_id) {
+ kfree(dev);
+ return NULL;
+ }
+
+ return 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);
spin_unlock(&pnp_lock);
ret = device_register(&dev->dev);
- if (ret == 0)
- pnp_interface_attach_device(dev);
- return ret;
+ if (ret)
+ return ret;
+
+ pnp_interface_attach_device(dev);
+ return 0;
}
/*
*
* adds to driver model, name database, fixups, interface, etc.
*/
-
int pnp_add_device(struct pnp_dev *dev)
{
- if (!dev || !dev->protocol || dev->card)
+ int ret;
+
+ if (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);
+
+ ret = __pnp_add_device(dev);
+ if (ret)
+ return ret;
+
+#ifdef CONFIG_PNP_DEBUG
+ {
+ struct pnp_id *id;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs",
+ dev->protocol->name);
+ for (id = dev->id; id; id = id->next)
+ printk(" %s", id->id);
+ printk(" (%s)\n", dev->active ? "active" : "disabled");
+ }
+#endif
+ return 0;
}
void __pnp_remove_device(struct pnp_dev *dev)
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");
}
subsys_initcall(pnp_init);
-
-EXPORT_SYMBOL(pnp_register_protocol);
-EXPORT_SYMBOL(pnp_unregister_protocol);
-EXPORT_SYMBOL(pnp_add_device);
-EXPORT_SYMBOL(pnp_remove_device);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff