[deliverable/linux.git] / drivers / pnp / core.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 <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 = kzalloc(size, GFP_KERNEL);
	if (!result){
		printk(KERN_ERR "pnp: Out of Memory\n");
		return NULL;
	}
	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.dma_mask = &dev->dma_mask;
	dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK;
	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
 */
#if 0
void pnp_remove_device(struct pnp_dev *dev)
{
	if (!dev || dev->card)
		return;
	__pnp_remove_device(dev);
}
#endif  /*  0  */

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);

#if 0
EXPORT_SYMBOL(pnp_register_protocol);
EXPORT_SYMBOL(pnp_unregister_protocol);
EXPORT_SYMBOL(pnp_add_device);
EXPORT_SYMBOL(pnp_remove_device);
#endif  /*  0  */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* core.c - contains all core device and protocol registration functions
	3	*
	4	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
	5	*
	6	*/
	7
	8	#include <linux/pnp.h>
	9	#include <linux/types.h>
	10	#include <linux/list.h>
	11	#include <linux/device.h>
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/string.h>
	15	#include <linux/slab.h>
	16	#include <linux/errno.h>
2e17c550	17	#include <linux/dma-mapping.h>
1da177e4 LT	18
	19	#include "base.h"
	20
	21
	22	static LIST_HEAD(pnp_protocols);
	23	LIST_HEAD(pnp_global);
	24	DEFINE_SPINLOCK(pnp_lock);
	25
8f81dd14 BH	26	/*
	27	* ACPI or PNPBIOS should tell us about all platform devices, so we can
	28	* skip some blind probes. ISAPNP typically enumerates only plug-in ISA
	29	* devices, not built-in things like COM ports.
	30	*/
	31	int pnp_platform_devices;
	32	EXPORT_SYMBOL(pnp_platform_devices);
	33
1da177e4 LT	34	void *pnp_alloc(long size)
	35	{
	36	void *result;
	37
dd00cc48	38	result = kzalloc(size, GFP_KERNEL);
1da177e4 LT	39	if (!result){
	40	printk(KERN_ERR "pnp: Out of Memory\n");
	41	return NULL;
	42	}
1da177e4 LT	43	return result;
	44	}
	45
	46	/**
	47	* pnp_protocol_register - adds a pnp protocol to the pnp layer
	48	* @protocol: pointer to the corresponding pnp_protocol structure
	49	*
	50	* Ex protocols: ISAPNP, PNPBIOS, etc
	51	*/
	52
	53	int pnp_register_protocol(struct pnp_protocol *protocol)
	54	{
	55	int nodenum;
	56	struct list_head * pos;
	57
	58	if (!protocol)
	59	return -EINVAL;
	60
	61	INIT_LIST_HEAD(&protocol->devices);
	62	INIT_LIST_HEAD(&protocol->cards);
	63	nodenum = 0;
	64	spin_lock(&pnp_lock);
	65
	66	/* assign the lowest unused number */
	67	list_for_each(pos,&pnp_protocols) {
	68	struct pnp_protocol * cur = to_pnp_protocol(pos);
	69	if (cur->number == nodenum){
	70	pos = &pnp_protocols;
	71	nodenum++;
	72	}
	73	}
	74
	75	list_add_tail(&protocol->protocol_list, &pnp_protocols);
	76	spin_unlock(&pnp_lock);
	77
	78	protocol->number = nodenum;
	79	sprintf(protocol->dev.bus_id, "pnp%d", nodenum);
	80	return device_register(&protocol->dev);
	81	}
	82
	83	/**
	84	* pnp_protocol_unregister - removes a pnp protocol from the pnp layer
	85	* @protocol: pointer to the corresponding pnp_protocol structure
	86	*
	87	*/
	88	void pnp_unregister_protocol(struct pnp_protocol *protocol)
	89	{
	90	spin_lock(&pnp_lock);
	91	list_del(&protocol->protocol_list);
	92	spin_unlock(&pnp_lock);
	93	device_unregister(&protocol->dev);
	94	}
	95
	96
	97	static void pnp_free_ids(struct pnp_dev *dev)
	98	{
	99	struct pnp_id * id;
	100	struct pnp_id * next;
	101	if (!dev)
	102	return;
	103	id = dev->id;
	104	while (id) {
	105	next = id->next;
	106	kfree(id);
107	id = next;
108	}
109	}
110
111	static void pnp_release_device(struct device *dmdev)
112	{
113	struct pnp_dev * dev = to_pnp_dev(dmdev);
114	pnp_free_option(dev->independent);
115	pnp_free_option(dev->dependent);
116	pnp_free_ids(dev);
117	kfree(dev);
118	}
119
120	int __pnp_add_device(struct pnp_dev *dev)
121	{
122	int ret;
123	pnp_fixup_device(dev);
124	dev->dev.bus = &pnp_bus_type;
2e17c550 DB	125	dev->dev.dma_mask = &dev->dma_mask;
2e17c550 DB	126	dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK;
1da177e4 LT	127	dev->dev.release = &pnp_release_device;
	128	dev->status = PNP_READY;
	129	spin_lock(&pnp_lock);
	130	list_add_tail(&dev->global_list, &pnp_global);
	131	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
	132	spin_unlock(&pnp_lock);
	133
	134	ret = device_register(&dev->dev);
	135	if (ret == 0)
	136	pnp_interface_attach_device(dev);
	137	return ret;
	138	}
	139
	140	/*
	141	* pnp_add_device - adds a pnp device to the pnp layer
	142	* @dev: pointer to dev to add
	143	*
	144	* adds to driver model, name database, fixups, interface, etc.
	145	*/
	146
	147	int pnp_add_device(struct pnp_dev *dev)
	148	{
	149	if (!dev \|\| !dev->protocol \|\| dev->card)
	150	return -EINVAL;
	151	dev->dev.parent = &dev->protocol->dev;
	152	sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number, dev->number);
	153	return __pnp_add_device(dev);
	154	}
	155
	156	void __pnp_remove_device(struct pnp_dev *dev)
	157	{
	158	spin_lock(&pnp_lock);
	159	list_del(&dev->global_list);
	160	list_del(&dev->protocol_list);
	161	spin_unlock(&pnp_lock);
	162	device_unregister(&dev->dev);
	163	}
	164
	165	/**
	166	* pnp_remove_device - removes a pnp device from the pnp layer
	167	* @dev: pointer to dev to add
	168	*
	169	* this function will free all mem used by dev
	170	*/
b449f63c	171	#if 0
1da177e4 LT	172	void pnp_remove_device(struct pnp_dev *dev)
	173	{
	174	if (!dev \|\| dev->card)
	175	return;
	176	__pnp_remove_device(dev);
	177	}
b449f63c	178	#endif /* 0 */
1da177e4 LT	179
	180	static int __init pnp_init(void)
	181	{
	182	printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
	183	return bus_register(&pnp_bus_type);
	184	}
	185
	186	subsys_initcall(pnp_init);
	187
b449f63c	188	#if 0
1da177e4 LT	189	EXPORT_SYMBOL(pnp_register_protocol);
	190	EXPORT_SYMBOL(pnp_unregister_protocol);
	191	EXPORT_SYMBOL(pnp_add_device);
	192	EXPORT_SYMBOL(pnp_remove_device);
b449f63c	193	#endif /* 0 */