[linux-block.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);
}

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);
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>
1da177e4 LT	5	*/
	6
	7	#include <linux/pnp.h>
	8	#include <linux/types.h>
	9	#include <linux/list.h>
	10	#include <linux/device.h>
	11	#include <linux/module.h>
	12	#include <linux/init.h>
	13	#include <linux/string.h>
	14	#include <linux/slab.h>
	15	#include <linux/errno.h>
2e17c550	16	#include <linux/dma-mapping.h>
1da177e4 LT	17
	18	#include "base.h"
	19
1da177e4 LT	20	static LIST_HEAD(pnp_protocols);
	21	LIST_HEAD(pnp_global);
	22	DEFINE_SPINLOCK(pnp_lock);
	23
8f81dd14 BH	24	/*
	25	* ACPI or PNPBIOS should tell us about all platform devices, so we can
	26	* skip some blind probes. ISAPNP typically enumerates only plug-in ISA
	27	* devices, not built-in things like COM ports.
	28	*/
	29	int pnp_platform_devices;
	30	EXPORT_SYMBOL(pnp_platform_devices);
	31
1da177e4 LT	32	void *pnp_alloc(long size)
	33	{
	34	void *result;
	35
dd00cc48	36	result = kzalloc(size, GFP_KERNEL);
9dd78466	37	if (!result) {
1da177e4 LT	38	printk(KERN_ERR "pnp: Out of Memory\n");
	39	return NULL;
	40	}
1da177e4 LT	41	return result;
	42	}
	43
	44	/**
	45	* pnp_protocol_register - adds a pnp protocol to the pnp layer
	46	* @protocol: pointer to the corresponding pnp_protocol structure
	47	*
	48	* Ex protocols: ISAPNP, PNPBIOS, etc
	49	*/
1da177e4 LT	50	int pnp_register_protocol(struct pnp_protocol *protocol)
	51	{
	52	int nodenum;
9dd78466	53	struct list_head *pos;
1da177e4 LT	54
	55	if (!protocol)
	56	return -EINVAL;
	57
	58	INIT_LIST_HEAD(&protocol->devices);
	59	INIT_LIST_HEAD(&protocol->cards);
	60	nodenum = 0;
	61	spin_lock(&pnp_lock);
	62
	63	/* assign the lowest unused number */
9dd78466 BH	64	list_for_each(pos, &pnp_protocols) {
	65	struct pnp_protocol *cur = to_pnp_protocol(pos);
	66	if (cur->number == nodenum) {
1da177e4 LT	67	pos = &pnp_protocols;
	68	nodenum++;
	69	}
	70	}
	71
	72	list_add_tail(&protocol->protocol_list, &pnp_protocols);
	73	spin_unlock(&pnp_lock);
	74
	75	protocol->number = nodenum;
	76	sprintf(protocol->dev.bus_id, "pnp%d", nodenum);
	77	return device_register(&protocol->dev);
	78	}
	79
	80	/**
	81	* pnp_protocol_unregister - removes a pnp protocol from the pnp layer
	82	* @protocol: pointer to the corresponding pnp_protocol structure
1da177e4 LT	83	*/
	84	void pnp_unregister_protocol(struct pnp_protocol *protocol)
	85	{
	86	spin_lock(&pnp_lock);
	87	list_del(&protocol->protocol_list);
	88	spin_unlock(&pnp_lock);
	89	device_unregister(&protocol->dev);
	90	}
	91
1da177e4 LT	92	static void pnp_free_ids(struct pnp_dev *dev)
1da177e4 LT	93	{
9dd78466 BH	94	struct pnp_id *id;
9dd78466 BH	95	struct pnp_id *next;
07d4e9af	96
1da177e4 LT	97	if (!dev)
	98	return;
	99	id = dev->id;
	100	while (id) {
	101	next = id->next;
	102	kfree(id);
	103	id = next;
	104	}
	105	}
	106
	107	static void pnp_release_device(struct device *dmdev)
	108	{
9dd78466	109	struct pnp_dev *dev = to_pnp_dev(dmdev);
07d4e9af	110
1da177e4 LT	111	pnp_free_option(dev->independent);
	112	pnp_free_option(dev->dependent);
	113	pnp_free_ids(dev);
	114	kfree(dev);
	115	}
	116
	117	int __pnp_add_device(struct pnp_dev *dev)
	118	{
	119	int ret;
07d4e9af	120
1da177e4 LT	121	pnp_fixup_device(dev);
1da177e4 LT	122	dev->dev.bus = &pnp_bus_type;
2e17c550 DB	123	dev->dev.dma_mask = &dev->dma_mask;
2e17c550 DB	124	dev->dma_mask = dev->dev.coherent_dma_mask = DMA_24BIT_MASK;
1da177e4 LT	125	dev->dev.release = &pnp_release_device;
	126	dev->status = PNP_READY;
	127	spin_lock(&pnp_lock);
	128	list_add_tail(&dev->global_list, &pnp_global);
	129	list_add_tail(&dev->protocol_list, &dev->protocol->devices);
	130	spin_unlock(&pnp_lock);
	131
	132	ret = device_register(&dev->dev);
	133	if (ret == 0)
	134	pnp_interface_attach_device(dev);
	135	return ret;
	136	}
	137
	138	/*
	139	* pnp_add_device - adds a pnp device to the pnp layer
	140	* @dev: pointer to dev to add
	141	*
	142	* adds to driver model, name database, fixups, interface, etc.
	143	*/
1da177e4 LT	144	int pnp_add_device(struct pnp_dev *dev)
	145	{
	146	if (!dev \|\| !dev->protocol \|\| dev->card)
	147	return -EINVAL;
	148	dev->dev.parent = &dev->protocol->dev;
9dd78466 BH	149	sprintf(dev->dev.bus_id, "%02x:%02x", dev->protocol->number,
9dd78466 BH	150	dev->number);
1da177e4 LT	151	return __pnp_add_device(dev);
	152	}
	153
	154	void __pnp_remove_device(struct pnp_dev *dev)
	155	{
	156	spin_lock(&pnp_lock);
	157	list_del(&dev->global_list);
	158	list_del(&dev->protocol_list);
	159	spin_unlock(&pnp_lock);
	160	device_unregister(&dev->dev);
	161	}
	162
1da177e4 LT	163	static int __init pnp_init(void)
	164	{
	165	printk(KERN_INFO "Linux Plug and Play Support v0.97 (c) Adam Belay\n");
	166	return bus_register(&pnp_bus_type);
	167	}
	168
	169	subsys_initcall(pnp_init);