[mirror_ubuntu-jammy-kernel.git] / drivers / pnp / card.c

/*
 * card.c - contains functions for managing groups of PnP devices
 *
 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/pnp.h>
#include "base.h"

LIST_HEAD(pnp_cards);
static LIST_HEAD(pnp_card_drivers);


static const struct pnp_card_device_id * match_card(struct pnp_card_driver * drv, struct pnp_card * card)
{
	const struct pnp_card_device_id * drv_id = drv->id_table;
	while (*drv_id->id){
		if (compare_pnp_id(card->id,drv_id->id)) {
			int i = 0;
			for (;;) {
				int found;
				struct pnp_dev *dev;
				if (i == PNP_MAX_DEVICES || ! *drv_id->devs[i].id)
					return drv_id;
				found = 0;
				card_for_each_dev(card, dev) {
					if (compare_pnp_id(dev->id, drv_id->devs[i].id)) {
						found = 1;
						break;
					}
				}
				if (! found)
					break;
				i++;
			}
		}
		drv_id++;
	}
	return NULL;
}

static void card_remove(struct pnp_dev * dev)
{
	dev->card_link = NULL;
}

static void card_remove_first(struct pnp_dev * dev)
{
	struct pnp_card_driver * drv = to_pnp_card_driver(dev->driver);
	if (!dev->card || !drv)
		return;
	if (drv->remove)
		drv->remove(dev->card_link);
	drv->link.remove = &card_remove;
	kfree(dev->card_link);
	card_remove(dev);
}

static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
{
	const struct pnp_card_device_id *id;
	struct pnp_card_link *clink;
	struct pnp_dev *dev;

	if (!drv->probe)
		return 0;
	id = match_card(drv,card);
	if (!id)
		return 0;

	clink = pnp_alloc(sizeof(*clink));
	if (!clink)
		return 0;
	clink->card = card;
	clink->driver = drv;
	clink->pm_state = PMSG_ON;

	if (drv->probe(clink, id) >= 0)
		return 1;

	/* Recovery */
	card_for_each_dev(card, dev) {
		if (dev->card_link == clink)
			pnp_release_card_device(dev);
	}
	kfree(clink);
	return 0;
}

/**
 * pnp_add_card_id - adds an EISA id to the specified card
 * @id: pointer to a pnp_id structure
 * @card: pointer to the desired card
 *
 */

int pnp_add_card_id(struct pnp_id *id, struct pnp_card * card)
{
	struct pnp_id * ptr;
	if (!id)
		return -EINVAL;
	if (!card)
		return -EINVAL;
	id->next = NULL;
	ptr = card->id;
	while (ptr && ptr->next)
		ptr = ptr->next;
	if (ptr)
		ptr->next = id;
	else
		card->id = id;
	return 0;
}

static void pnp_free_card_ids(struct pnp_card * card)
{
	struct pnp_id * id;
	struct pnp_id *next;
	if (!card)
		return;
	id = card->id;
	while (id) {
		next = id->next;
		kfree(id);
		id = next;
	}
}

static void pnp_release_card(struct device *dmdev)
{
	struct pnp_card * card = to_pnp_card(dmdev);
	pnp_free_card_ids(card);
	kfree(card);
}


static ssize_t pnp_show_card_name(struct device *dmdev, struct device_attribute *attr, char *buf)
{
	char *str = buf;
	struct pnp_card *card = to_pnp_card(dmdev);
	str += sprintf(str,"%s\n", card->name);
	return (str - buf);
}

static DEVICE_ATTR(name,S_IRUGO,pnp_show_card_name,NULL);

static ssize_t pnp_show_card_ids(struct device *dmdev, struct device_attribute *attr, char *buf)
{
	char *str = buf;
	struct pnp_card *card = to_pnp_card(dmdev);
	struct pnp_id * pos = card->id;

	while (pos) {
		str += sprintf(str,"%s\n", pos->id);
		pos = pos->next;
	}
	return (str - buf);
}

static DEVICE_ATTR(card_id,S_IRUGO,pnp_show_card_ids,NULL);

static int pnp_interface_attach_card(struct pnp_card *card)
{
	device_create_file(&card->dev,&dev_attr_name);
	device_create_file(&card->dev,&dev_attr_card_id);
	return 0;
}

/**
 * pnp_add_card - adds a PnP card to the PnP Layer
 * @card: pointer to the card to add
 */

int pnp_add_card(struct pnp_card * card)
{
	int error;
	struct list_head * pos, * temp;
	if (!card || !card->protocol)
		return -EINVAL;

	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, card->number);
	card->dev.parent = &card->protocol->dev;
	card->dev.bus = NULL;
	card->dev.release = &pnp_release_card;
	error = device_register(&card->dev);

	if (error == 0) {
		pnp_interface_attach_card(card);
		spin_lock(&pnp_lock);
		list_add_tail(&card->global_list, &pnp_cards);
		list_add_tail(&card->protocol_list, &card->protocol->cards);
		spin_unlock(&pnp_lock);

		/* we wait until now to add devices in order to ensure the drivers
		 * will be able to use all of the related devices on the card
		 * without waiting any unresonable length of time */
		list_for_each(pos,&card->devices){
			struct pnp_dev *dev = card_to_pnp_dev(pos);
			__pnp_add_device(dev);
		}

		/* match with card drivers */
		list_for_each_safe(pos,temp,&pnp_card_drivers){
			struct pnp_card_driver * drv = list_entry(pos, struct pnp_card_driver, global_list);
			card_probe(card,drv);
		}
	} else
		pnp_err("sysfs failure, card '%s' will be unavailable", card->dev.bus_id);
	return error;
}

/**
 * pnp_remove_card - removes a PnP card from the PnP Layer
 * @card: pointer to the card to remove
 */

void pnp_remove_card(struct pnp_card * card)
{
	struct list_head *pos, *temp;
	if (!card)
		return;
	device_unregister(&card->dev);
	spin_lock(&pnp_lock);
	list_del(&card->global_list);
	list_del(&card->protocol_list);
	spin_unlock(&pnp_lock);
	list_for_each_safe(pos,temp,&card->devices){
		struct pnp_dev *dev = card_to_pnp_dev(pos);
		pnp_remove_card_device(dev);
	}
}

/**
 * pnp_add_card_device - adds a device to the specified card
 * @card: pointer to the card to add to
 * @dev: pointer to the device to add
 */

int pnp_add_card_device(struct pnp_card * card, struct pnp_dev * dev)
{
	if (!card || !dev || !dev->protocol)
		return -EINVAL;
	dev->dev.parent = &card->dev;
	dev->card_link = NULL;
	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", dev->protocol->number,
		 card->number,dev->number);
	spin_lock(&pnp_lock);
	dev->card = card;
	list_add_tail(&dev->card_list, &card->devices);
	spin_unlock(&pnp_lock);
	return 0;
}

/**
 * pnp_remove_card_device- removes a device from the specified card
 * @dev: pointer to the device to remove
 */

void pnp_remove_card_device(struct pnp_dev * dev)
{
	spin_lock(&pnp_lock);
	dev->card = NULL;
	list_del(&dev->card_list);
	spin_unlock(&pnp_lock);
	__pnp_remove_device(dev);
}

/**
 * pnp_request_card_device - Searches for a PnP device under the specified card
 * @clink: pointer to the card link, cannot be NULL
 * @id: pointer to a PnP ID structure that explains the rules for finding the device
 * @from: Starting place to search from. If NULL it will start from the begining.
 */

struct pnp_dev * pnp_request_card_device(struct pnp_card_link *clink, const char * id, struct pnp_dev * from)
{
	struct list_head * pos;
	struct pnp_dev * dev;
	struct pnp_card_driver * drv;
	struct pnp_card * card;
	if (!clink || !id)
		goto done;
	card = clink->card;
	drv = clink->driver;
	if (!from) {
		pos = card->devices.next;
	} else {
		if (from->card != card)
			goto done;
		pos = from->card_list.next;
	}
	while (pos != &card->devices) {
		dev = card_to_pnp_dev(pos);
		if ((!dev->card_link) && compare_pnp_id(dev->id,id))
			goto found;
		pos = pos->next;
	}

done:
	return NULL;

found:
	down_write(&dev->dev.bus->subsys.rwsem);
	dev->card_link = clink;
	dev->dev.driver = &drv->link.driver;
	if (pnp_bus_type.probe(&dev->dev)) {
		dev->dev.driver = NULL;
		dev->card_link = NULL;
		up_write(&dev->dev.bus->subsys.rwsem);
		return NULL;
	}
	device_bind_driver(&dev->dev);
	up_write(&dev->dev.bus->subsys.rwsem);

	return dev;
}

/**
 * pnp_release_card_device - call this when the driver no longer needs the device
 * @dev: pointer to the PnP device stucture
 */

void pnp_release_card_device(struct pnp_dev * dev)
{
	struct pnp_card_driver * drv = dev->card_link->driver;
	if (!drv)
		return;
	down_write(&dev->dev.bus->subsys.rwsem);
	drv->link.remove = &card_remove;
	device_release_driver(&dev->dev);
	drv->link.remove = &card_remove_first;
	up_write(&dev->dev.bus->subsys.rwsem);
}

/*
 * suspend/resume callbacks
 */
static int card_suspend(struct pnp_dev *dev, pm_message_t state)
{
	struct pnp_card_link *link = dev->card_link;
	if (link->pm_state.event == state.event)
		return 0;
	link->pm_state = state;
	return link->driver->suspend(link, state);
}

static int card_resume(struct pnp_dev *dev)
{
	struct pnp_card_link *link = dev->card_link;
	if (link->pm_state.event == PM_EVENT_ON)
		return 0;
	link->pm_state = PMSG_ON;
	link->driver->resume(link);
	return 0;
}

/**
 * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
 * @drv: pointer to the driver to register
 */

int pnp_register_card_driver(struct pnp_card_driver * drv)
{
	int error;
	struct list_head *pos, *temp;

	drv->link.name = drv->name;
	drv->link.id_table = NULL;	/* this will disable auto matching */
	drv->link.flags = drv->flags;
	drv->link.probe = NULL;
	drv->link.remove = &card_remove_first;
	drv->link.suspend = drv->suspend ? card_suspend : NULL;
	drv->link.resume = drv->resume ? card_resume : NULL;

	error = pnp_register_driver(&drv->link);
	if (error < 0)
		return error;

	spin_lock(&pnp_lock);
	list_add_tail(&drv->global_list, &pnp_card_drivers);
	spin_unlock(&pnp_lock);

	list_for_each_safe(pos,temp,&pnp_cards){
		struct pnp_card *card = list_entry(pos, struct pnp_card, global_list);
		card_probe(card,drv);
	}
	return 0;
}

/**
 * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
 * @drv: pointer to the driver to unregister
 */

void pnp_unregister_card_driver(struct pnp_card_driver * drv)
{
	spin_lock(&pnp_lock);
	list_del(&drv->global_list);
	spin_unlock(&pnp_lock);
	pnp_unregister_driver(&drv->link);
}

#if 0
EXPORT_SYMBOL(pnp_add_card);
EXPORT_SYMBOL(pnp_remove_card);
EXPORT_SYMBOL(pnp_add_card_device);
EXPORT_SYMBOL(pnp_remove_card_device);
EXPORT_SYMBOL(pnp_add_card_id);
#endif  /*  0  */
EXPORT_SYMBOL(pnp_request_card_device);
EXPORT_SYMBOL(pnp_release_card_device);
EXPORT_SYMBOL(pnp_register_card_driver);
EXPORT_SYMBOL(pnp_unregister_card_driver);
Commit	Line	Data
1da177e4 LT	1	/*
	2	* card.c - contains functions for managing groups of PnP devices
	3	*
	4	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
	5	*
	6	*/
	7
1da177e4 LT	8	#include <linux/module.h>
1da177e4 LT	9	#include <linux/slab.h>
1da177e4 LT	10	#include <linux/pnp.h>
	11	#include "base.h"
	12
	13	LIST_HEAD(pnp_cards);
b449f63c	14	static LIST_HEAD(pnp_card_drivers);
1da177e4 LT	15
	16
	17	static const struct pnp_card_device_id * match_card(struct pnp_card_driver * drv, struct pnp_card * card)
	18	{
	19	const struct pnp_card_device_id * drv_id = drv->id_table;
	20	while (*drv_id->id){
	21	if (compare_pnp_id(card->id,drv_id->id)) {
	22	int i = 0;
	23	for (;;) {
	24	int found;
	25	struct pnp_dev *dev;
	26	if (i == PNP_MAX_DEVICES \|\| ! *drv_id->devs[i].id)
	27	return drv_id;
	28	found = 0;
	29	card_for_each_dev(card, dev) {
	30	if (compare_pnp_id(dev->id, drv_id->devs[i].id)) {
	31	found = 1;
	32	break;
	33	}
	34	}
	35	if (! found)
	36	break;
	37	i++;
	38	}
	39	}
	40	drv_id++;
	41	}
	42	return NULL;
	43	}
	44
	45	static void card_remove(struct pnp_dev * dev)
	46	{
	47	dev->card_link = NULL;
	48	}
982c6094	49
1da177e4 LT	50	static void card_remove_first(struct pnp_dev * dev)
	51	{
	52	struct pnp_card_driver * drv = to_pnp_card_driver(dev->driver);
	53	if (!dev->card \|\| !drv)
	54	return;
	55	if (drv->remove)
	56	drv->remove(dev->card_link);
	57	drv->link.remove = &card_remove;
	58	kfree(dev->card_link);
	59	card_remove(dev);
	60	}
	61
a9adb8db	62	static int card_probe(struct pnp_card card, struct pnp_card_driver drv)
1da177e4	63	{
a9adb8db JJ	64	const struct pnp_card_device_id *id;
	65	struct pnp_card_link *clink;
	66	struct pnp_dev *dev;
	67
	68	if (!drv->probe)
	69	return 0;
	70	id = match_card(drv,card);
	71	if (!id)
	72	return 0;
	73
	74	clink = pnp_alloc(sizeof(*clink));
	75	if (!clink)
	76	return 0;
	77	clink->card = card;
	78	clink->driver = drv;
	79	clink->pm_state = PMSG_ON;
	80
	81	if (drv->probe(clink, id) >= 0)
	82	return 1;
	83
	84	/* Recovery */
	85	card_for_each_dev(card, dev) {
	86	if (dev->card_link == clink)
	87	pnp_release_card_device(dev);
1da177e4	88	}
a9adb8db	89	kfree(clink);
1da177e4 LT	90	return 0;
	91	}
	92
	93	/**
	94	* pnp_add_card_id - adds an EISA id to the specified card
	95	* @id: pointer to a pnp_id structure
	96	* @card: pointer to the desired card
	97	*
	98	*/
	99
	100	int pnp_add_card_id(struct pnp_id id, struct pnp_card card)
	101	{
	102	struct pnp_id * ptr;
	103	if (!id)
	104	return -EINVAL;
	105	if (!card)
	106	return -EINVAL;
	107	id->next = NULL;
	108	ptr = card->id;
	109	while (ptr && ptr->next)
	110	ptr = ptr->next;
	111	if (ptr)
	112	ptr->next = id;
	113	else
	114	card->id = id;
	115	return 0;
	116	}
	117
	118	static void pnp_free_card_ids(struct pnp_card * card)
	119	{
	120	struct pnp_id * id;
	121	struct pnp_id *next;
	122	if (!card)
	123	return;
	124	id = card->id;
	125	while (id) {
	126	next = id->next;
	127	kfree(id);
	128	id = next;
	129	}
	130	}
	131
	132	static void pnp_release_card(struct device *dmdev)
	133	{
	134	struct pnp_card * card = to_pnp_card(dmdev);
	135	pnp_free_card_ids(card);
	136	kfree(card);
	137	}
	138
	139
e404e274	140	static ssize_t pnp_show_card_name(struct device dmdev, struct device_attribute attr, char *buf)
1da177e4 LT	141	{
	142	char *str = buf;
	143	struct pnp_card *card = to_pnp_card(dmdev);
	144	str += sprintf(str,"%s\n", card->name);
	145	return (str - buf);
	146	}
	147
	148	static DEVICE_ATTR(name,S_IRUGO,pnp_show_card_name,NULL);
	149
e404e274	150	static ssize_t pnp_show_card_ids(struct device dmdev, struct device_attribute attr, char *buf)
1da177e4 LT	151	{
	152	char *str = buf;
	153	struct pnp_card *card = to_pnp_card(dmdev);
	154	struct pnp_id * pos = card->id;
	155
	156	while (pos) {
	157	str += sprintf(str,"%s\n", pos->id);
	158	pos = pos->next;
	159	}
	160	return (str - buf);
	161	}
	162
	163	static DEVICE_ATTR(card_id,S_IRUGO,pnp_show_card_ids,NULL);
	164
	165	static int pnp_interface_attach_card(struct pnp_card *card)
	166	{
	167	device_create_file(&card->dev,&dev_attr_name);
	168	device_create_file(&card->dev,&dev_attr_card_id);
	169	return 0;
	170	}
	171
	172	/**
	173	* pnp_add_card - adds a PnP card to the PnP Layer
	174	* @card: pointer to the card to add
	175	*/
	176
	177	int pnp_add_card(struct pnp_card * card)
	178	{
	179	int error;
	180	struct list_head * pos, * temp;
	181	if (!card \|\| !card->protocol)
	182	return -EINVAL;
	183
	184	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, card->number);
	185	card->dev.parent = &card->protocol->dev;
	186	card->dev.bus = NULL;
	187	card->dev.release = &pnp_release_card;
	188	error = device_register(&card->dev);
	189
	190	if (error == 0) {
	191	pnp_interface_attach_card(card);
	192	spin_lock(&pnp_lock);
	193	list_add_tail(&card->global_list, &pnp_cards);
	194	list_add_tail(&card->protocol_list, &card->protocol->cards);
	195	spin_unlock(&pnp_lock);
	196
	197	/* we wait until now to add devices in order to ensure the drivers
	198	* will be able to use all of the related devices on the card
	199	* without waiting any unresonable length of time */
	200	list_for_each(pos,&card->devices){
	201	struct pnp_dev *dev = card_to_pnp_dev(pos);
	202	__pnp_add_device(dev);
	203	}
	204
	205	/* match with card drivers */
	206	list_for_each_safe(pos,temp,&pnp_card_drivers){
	207	struct pnp_card_driver * drv = list_entry(pos, struct pnp_card_driver, global_list);
	208	card_probe(card,drv);
	209	}
	210	} else
	211	pnp_err("sysfs failure, card '%s' will be unavailable", card->dev.bus_id);
	212	return error;
	213	}
	214
215	/**
216	* pnp_remove_card - removes a PnP card from the PnP Layer
217	* @card: pointer to the card to remove
218	*/
219
220	void pnp_remove_card(struct pnp_card * card)
221	{
222	struct list_head pos, temp;
223	if (!card)
224	return;
225	device_unregister(&card->dev);
226	spin_lock(&pnp_lock);
227	list_del(&card->global_list);
228	list_del(&card->protocol_list);
229	spin_unlock(&pnp_lock);
230	list_for_each_safe(pos,temp,&card->devices){
231	struct pnp_dev *dev = card_to_pnp_dev(pos);
232	pnp_remove_card_device(dev);
233	}
234	}
235
236	/**
237	* pnp_add_card_device - adds a device to the specified card
238	* @card: pointer to the card to add to
239	* @dev: pointer to the device to add
240	*/
241
242	int pnp_add_card_device(struct pnp_card * card, struct pnp_dev * dev)
243	{
244	if (!card \|\| !dev \|\| !dev->protocol)
245	return -EINVAL;
246	dev->dev.parent = &card->dev;
247	dev->card_link = NULL;
248	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", dev->protocol->number,
249	card->number,dev->number);
250	spin_lock(&pnp_lock);
251	dev->card = card;
252	list_add_tail(&dev->card_list, &card->devices);
253	spin_unlock(&pnp_lock);
254	return 0;
255	}
256
257	/**
258	* pnp_remove_card_device- removes a device from the specified card
1da177e4 LT	259	* @dev: pointer to the device to remove
	260	*/
	261
	262	void pnp_remove_card_device(struct pnp_dev * dev)
	263	{
	264	spin_lock(&pnp_lock);
	265	dev->card = NULL;
	266	list_del(&dev->card_list);
	267	spin_unlock(&pnp_lock);
	268	__pnp_remove_device(dev);
	269	}
	270
	271	/**
	272	* pnp_request_card_device - Searches for a PnP device under the specified card
3d41088f	273	* @clink: pointer to the card link, cannot be NULL
1da177e4 LT	274	* @id: pointer to a PnP ID structure that explains the rules for finding the device
	275	* @from: Starting place to search from. If NULL it will start from the begining.
	276	*/
	277
	278	struct pnp_dev * pnp_request_card_device(struct pnp_card_link clink, const char id, struct pnp_dev * from)
	279	{
	280	struct list_head * pos;
	281	struct pnp_dev * dev;
	282	struct pnp_card_driver * drv;
	283	struct pnp_card * card;
	284	if (!clink \|\| !id)
	285	goto done;
	286	card = clink->card;
	287	drv = clink->driver;
	288	if (!from) {
	289	pos = card->devices.next;
	290	} else {
	291	if (from->card != card)
	292	goto done;
	293	pos = from->card_list.next;
	294	}
	295	while (pos != &card->devices) {
	296	dev = card_to_pnp_dev(pos);
	297	if ((!dev->card_link) && compare_pnp_id(dev->id,id))
	298	goto found;
	299	pos = pos->next;
	300	}
	301
	302	done:
	303	return NULL;
	304
	305	found:
	306	down_write(&dev->dev.bus->subsys.rwsem);
	307	dev->card_link = clink;
	308	dev->dev.driver = &drv->link.driver;
8b613e1c AB	309	if (pnp_bus_type.probe(&dev->dev)) {
	310	dev->dev.driver = NULL;
	311	dev->card_link = NULL;
	312	up_write(&dev->dev.bus->subsys.rwsem);
	313	return NULL;
1da177e4 LT	314	}
	315	device_bind_driver(&dev->dev);
	316	up_write(&dev->dev.bus->subsys.rwsem);
	317
	318	return dev;
	319	}
	320
	321	/**
	322	* pnp_release_card_device - call this when the driver no longer needs the device
	323	* @dev: pointer to the PnP device stucture
	324	*/
	325
	326	void pnp_release_card_device(struct pnp_dev * dev)
	327	{
	328	struct pnp_card_driver * drv = dev->card_link->driver;
	329	if (!drv)
	330	return;
	331	down_write(&dev->dev.bus->subsys.rwsem);
	332	drv->link.remove = &card_remove;
	333	device_release_driver(&dev->dev);
	334	drv->link.remove = &card_remove_first;
	335	up_write(&dev->dev.bus->subsys.rwsem);
	336	}
	337
4c98cfef TI	338	/*
	339	* suspend/resume callbacks
	340	*/
	341	static int card_suspend(struct pnp_dev *dev, pm_message_t state)
	342	{
	343	struct pnp_card_link *link = dev->card_link;
	344	if (link->pm_state.event == state.event)
	345	return 0;
	346	link->pm_state = state;
	347	return link->driver->suspend(link, state);
	348	}
	349
	350	static int card_resume(struct pnp_dev *dev)
	351	{
	352	struct pnp_card_link *link = dev->card_link;
	353	if (link->pm_state.event == PM_EVENT_ON)
	354	return 0;
	355	link->pm_state = PMSG_ON;
	356	link->driver->resume(link);
	357	return 0;
	358	}
	359
1da177e4 LT	360	/**
	361	* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
	362	* @drv: pointer to the driver to register
	363	*/
	364
	365	int pnp_register_card_driver(struct pnp_card_driver * drv)
	366	{
982c6094	367	int error;
1da177e4 LT	368	struct list_head pos, temp;
	369
	370	drv->link.name = drv->name;
	371	drv->link.id_table = NULL; /* this will disable auto matching */
	372	drv->link.flags = drv->flags;
	373	drv->link.probe = NULL;
	374	drv->link.remove = &card_remove_first;
4c98cfef TI	375	drv->link.suspend = drv->suspend ? card_suspend : NULL;
4c98cfef TI	376	drv->link.resume = drv->resume ? card_resume : NULL;
1da177e4	377
982c6094 BH	378	error = pnp_register_driver(&drv->link);
	379	if (error < 0)
	380	return error;
d1d051b2	381
1da177e4 LT	382	spin_lock(&pnp_lock);
	383	list_add_tail(&drv->global_list, &pnp_card_drivers);
	384	spin_unlock(&pnp_lock);
d1d051b2	385
1da177e4 LT	386	list_for_each_safe(pos,temp,&pnp_cards){
1da177e4 LT	387	struct pnp_card *card = list_entry(pos, struct pnp_card, global_list);
982c6094	388	card_probe(card,drv);
1da177e4	389	}
982c6094	390	return 0;
1da177e4 LT	391	}
	392
	393	/**
	394	* pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
	395	* @drv: pointer to the driver to unregister
	396	*/
	397
	398	void pnp_unregister_card_driver(struct pnp_card_driver * drv)
	399	{
	400	spin_lock(&pnp_lock);
	401	list_del(&drv->global_list);
	402	spin_unlock(&pnp_lock);
	403	pnp_unregister_driver(&drv->link);
	404	}
	405
b449f63c	406	#if 0
1da177e4 LT	407	EXPORT_SYMBOL(pnp_add_card);
	408	EXPORT_SYMBOL(pnp_remove_card);
	409	EXPORT_SYMBOL(pnp_add_card_device);
	410	EXPORT_SYMBOL(pnp_remove_card_device);
	411	EXPORT_SYMBOL(pnp_add_card_id);
b449f63c	412	#endif /* 0 */
1da177e4 LT	413	EXPORT_SYMBOL(pnp_request_card_device);
	414	EXPORT_SYMBOL(pnp_release_card_device);
	415	EXPORT_SYMBOL(pnp_register_card_driver);
	416	EXPORT_SYMBOL(pnp_unregister_card_driver);