[mirror_ubuntu-artful-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/config.h>
#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 = match_card(drv,card);
	if (id) {
		struct pnp_card_link * clink = pnp_alloc(sizeof(struct pnp_card_link));
		if (!clink)
			return 0;
		clink->card = card;
		clink->driver = drv;
		clink->pm_state = PMSG_ON;
		if (drv->probe) {
			if (drv->probe(clink, id)>=0)
				return 1;
			else {
				struct pnp_dev * dev;
				card_for_each_dev(card, dev) {
					if (dev->card_link == clink)
						pnp_release_card_device(dev);
				}
				kfree(clink);
			}
		} else
			return 1;
	}
	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 (drv->link.driver.probe) {
		if (drv->link.driver.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 count = 0;
	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;

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

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

/**
 * 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
	8	#include <linux/config.h>
	9	#include <linux/module.h>
	10	#include <linux/slab.h>
1da177e4 LT	11	#include <linux/pnp.h>
	12	#include "base.h"
	13
	14	LIST_HEAD(pnp_cards);
b449f63c	15	static LIST_HEAD(pnp_card_drivers);
1da177e4 LT	16
	17
	18	static const struct pnp_card_device_id * match_card(struct pnp_card_driver * drv, struct pnp_card * card)
	19	{
	20	const struct pnp_card_device_id * drv_id = drv->id_table;
	21	while (*drv_id->id){
	22	if (compare_pnp_id(card->id,drv_id->id)) {
	23	int i = 0;
	24	for (;;) {
	25	int found;
	26	struct pnp_dev *dev;
	27	if (i == PNP_MAX_DEVICES \|\| ! *drv_id->devs[i].id)
	28	return drv_id;
	29	found = 0;
	30	card_for_each_dev(card, dev) {
	31	if (compare_pnp_id(dev->id, drv_id->devs[i].id)) {
	32	found = 1;
	33	break;
	34	}
	35	}
	36	if (! found)
	37	break;
	38	i++;
	39	}
	40	}
	41	drv_id++;
	42	}
	43	return NULL;
	44	}
	45
	46	static void card_remove(struct pnp_dev * dev)
	47	{
	48	dev->card_link = NULL;
	49	}
	50
	51	static void card_remove_first(struct pnp_dev * dev)
	52	{
	53	struct pnp_card_driver * drv = to_pnp_card_driver(dev->driver);
	54	if (!dev->card \|\| !drv)
	55	return;
	56	if (drv->remove)
	57	drv->remove(dev->card_link);
	58	drv->link.remove = &card_remove;
	59	kfree(dev->card_link);
	60	card_remove(dev);
	61	}
	62
	63	static int card_probe(struct pnp_card * card, struct pnp_card_driver * drv)
	64	{
	65	const struct pnp_card_device_id *id = match_card(drv,card);
	66	if (id) {
	67	struct pnp_card_link * clink = pnp_alloc(sizeof(struct pnp_card_link));
	68	if (!clink)
	69	return 0;
	70	clink->card = card;
	71	clink->driver = drv;
4c98cfef	72	clink->pm_state = PMSG_ON;
1da177e4 LT	73	if (drv->probe) {
	74	if (drv->probe(clink, id)>=0)
	75	return 1;
	76	else {
	77	struct pnp_dev * dev;
	78	card_for_each_dev(card, dev) {
	79	if (dev->card_link == clink)
	80	pnp_release_card_device(dev);
	81	}
	82	kfree(clink);
	83	}
	84	} else
	85	return 1;
	86	}
	87	return 0;
	88	}
	89
	90	/**
	91	* pnp_add_card_id - adds an EISA id to the specified card
	92	* @id: pointer to a pnp_id structure
	93	* @card: pointer to the desired card
	94	*
	95	*/
	96
	97	int pnp_add_card_id(struct pnp_id id, struct pnp_card card)
	98	{
	99	struct pnp_id * ptr;
	100	if (!id)
	101	return -EINVAL;
	102	if (!card)
	103	return -EINVAL;
	104	id->next = NULL;
	105	ptr = card->id;
	106	while (ptr && ptr->next)
	107	ptr = ptr->next;
	108	if (ptr)
	109	ptr->next = id;
	110	else
	111	card->id = id;
	112	return 0;
	113	}
	114
	115	static void pnp_free_card_ids(struct pnp_card * card)
	116	{
	117	struct pnp_id * id;
	118	struct pnp_id *next;
	119	if (!card)
	120	return;
	121	id = card->id;
	122	while (id) {
	123	next = id->next;
	124	kfree(id);
	125	id = next;
	126	}
	127	}
	128
	129	static void pnp_release_card(struct device *dmdev)
	130	{
	131	struct pnp_card * card = to_pnp_card(dmdev);
	132	pnp_free_card_ids(card);
	133	kfree(card);
	134	}
	135
	136
e404e274	137	static ssize_t pnp_show_card_name(struct device dmdev, struct device_attribute attr, char *buf)
1da177e4 LT	138	{
	139	char *str = buf;
	140	struct pnp_card *card = to_pnp_card(dmdev);
	141	str += sprintf(str,"%s\n", card->name);
	142	return (str - buf);
	143	}
	144
	145	static DEVICE_ATTR(name,S_IRUGO,pnp_show_card_name,NULL);
	146
e404e274	147	static ssize_t pnp_show_card_ids(struct device dmdev, struct device_attribute attr, char *buf)
1da177e4 LT	148	{
	149	char *str = buf;
	150	struct pnp_card *card = to_pnp_card(dmdev);
	151	struct pnp_id * pos = card->id;
	152
	153	while (pos) {
	154	str += sprintf(str,"%s\n", pos->id);
	155	pos = pos->next;
	156	}
	157	return (str - buf);
	158	}
	159
	160	static DEVICE_ATTR(card_id,S_IRUGO,pnp_show_card_ids,NULL);
	161
	162	static int pnp_interface_attach_card(struct pnp_card *card)
	163	{
	164	device_create_file(&card->dev,&dev_attr_name);
	165	device_create_file(&card->dev,&dev_attr_card_id);
	166	return 0;
	167	}
	168
	169	/**
	170	* pnp_add_card - adds a PnP card to the PnP Layer
	171	* @card: pointer to the card to add
	172	*/
	173
	174	int pnp_add_card(struct pnp_card * card)
	175	{
	176	int error;
	177	struct list_head * pos, * temp;
	178	if (!card \|\| !card->protocol)
	179	return -EINVAL;
	180
	181	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number, card->number);
	182	card->dev.parent = &card->protocol->dev;
	183	card->dev.bus = NULL;
	184	card->dev.release = &pnp_release_card;
	185	error = device_register(&card->dev);
	186
	187	if (error == 0) {
	188	pnp_interface_attach_card(card);
	189	spin_lock(&pnp_lock);
	190	list_add_tail(&card->global_list, &pnp_cards);
	191	list_add_tail(&card->protocol_list, &card->protocol->cards);
	192	spin_unlock(&pnp_lock);
	193
	194	/* we wait until now to add devices in order to ensure the drivers
	195	* will be able to use all of the related devices on the card
	196	* without waiting any unresonable length of time */
	197	list_for_each(pos,&card->devices){
	198	struct pnp_dev *dev = card_to_pnp_dev(pos);
	199	__pnp_add_device(dev);
	200	}
	201
	202	/* match with card drivers */
	203	list_for_each_safe(pos,temp,&pnp_card_drivers){
	204	struct pnp_card_driver * drv = list_entry(pos, struct pnp_card_driver, global_list);
	205	card_probe(card,drv);
	206	}
	207	} else
	208	pnp_err("sysfs failure, card '%s' will be unavailable", card->dev.bus_id);
	209	return error;
	210	}
	211
212	/**
213	* pnp_remove_card - removes a PnP card from the PnP Layer
214	* @card: pointer to the card to remove
215	*/
216
217	void pnp_remove_card(struct pnp_card * card)
218	{
219	struct list_head pos, temp;
220	if (!card)
221	return;
222	device_unregister(&card->dev);
223	spin_lock(&pnp_lock);
224	list_del(&card->global_list);
225	list_del(&card->protocol_list);
226	spin_unlock(&pnp_lock);
227	list_for_each_safe(pos,temp,&card->devices){
228	struct pnp_dev *dev = card_to_pnp_dev(pos);
229	pnp_remove_card_device(dev);
230	}
231	}
232
233	/**
234	* pnp_add_card_device - adds a device to the specified card
235	* @card: pointer to the card to add to
236	* @dev: pointer to the device to add
237	*/
238
239	int pnp_add_card_device(struct pnp_card * card, struct pnp_dev * dev)
240	{
241	if (!card \|\| !dev \|\| !dev->protocol)
242	return -EINVAL;
243	dev->dev.parent = &card->dev;
244	dev->card_link = NULL;
245	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x", dev->protocol->number,
246	card->number,dev->number);
247	spin_lock(&pnp_lock);
248	dev->card = card;
249	list_add_tail(&dev->card_list, &card->devices);
250	spin_unlock(&pnp_lock);
251	return 0;
252	}
253
254	/**
255	* pnp_remove_card_device- removes a device from the specified card
1da177e4 LT	256	* @dev: pointer to the device to remove
	257	*/
	258
	259	void pnp_remove_card_device(struct pnp_dev * dev)
	260	{
	261	spin_lock(&pnp_lock);
	262	dev->card = NULL;
	263	list_del(&dev->card_list);
	264	spin_unlock(&pnp_lock);
	265	__pnp_remove_device(dev);
	266	}
	267
	268	/**
	269	* pnp_request_card_device - Searches for a PnP device under the specified card
3d41088f	270	* @clink: pointer to the card link, cannot be NULL
1da177e4 LT	271	* @id: pointer to a PnP ID structure that explains the rules for finding the device
	272	* @from: Starting place to search from. If NULL it will start from the begining.
	273	*/
	274
	275	struct pnp_dev * pnp_request_card_device(struct pnp_card_link clink, const char id, struct pnp_dev * from)
	276	{
	277	struct list_head * pos;
	278	struct pnp_dev * dev;
	279	struct pnp_card_driver * drv;
	280	struct pnp_card * card;
	281	if (!clink \|\| !id)
	282	goto done;
	283	card = clink->card;
	284	drv = clink->driver;
	285	if (!from) {
	286	pos = card->devices.next;
	287	} else {
	288	if (from->card != card)
	289	goto done;
	290	pos = from->card_list.next;
	291	}
	292	while (pos != &card->devices) {
	293	dev = card_to_pnp_dev(pos);
	294	if ((!dev->card_link) && compare_pnp_id(dev->id,id))
	295	goto found;
	296	pos = pos->next;
	297	}
	298
	299	done:
	300	return NULL;
	301
	302	found:
	303	down_write(&dev->dev.bus->subsys.rwsem);
	304	dev->card_link = clink;
	305	dev->dev.driver = &drv->link.driver;
	306	if (drv->link.driver.probe) {
	307	if (drv->link.driver.probe(&dev->dev)) {
	308	dev->dev.driver = NULL;
30d5b64b JK	309	dev->card_link = NULL;
30d5b64b JK	310	up_write(&dev->dev.bus->subsys.rwsem);
1da177e4 LT	311	return NULL;
	312	}
	313	}
	314	device_bind_driver(&dev->dev);
	315	up_write(&dev->dev.bus->subsys.rwsem);
	316
	317	return dev;
	318	}
	319
	320	/**
	321	* pnp_release_card_device - call this when the driver no longer needs the device
	322	* @dev: pointer to the PnP device stucture
	323	*/
	324
	325	void pnp_release_card_device(struct pnp_dev * dev)
	326	{
	327	struct pnp_card_driver * drv = dev->card_link->driver;
	328	if (!drv)
	329	return;
	330	down_write(&dev->dev.bus->subsys.rwsem);
	331	drv->link.remove = &card_remove;
	332	device_release_driver(&dev->dev);
	333	drv->link.remove = &card_remove_first;
	334	up_write(&dev->dev.bus->subsys.rwsem);
	335	}
	336
4c98cfef TI	337	/*
	338	* suspend/resume callbacks
	339	*/
	340	static int card_suspend(struct pnp_dev *dev, pm_message_t state)
	341	{
	342	struct pnp_card_link *link = dev->card_link;
	343	if (link->pm_state.event == state.event)
	344	return 0;
	345	link->pm_state = state;
	346	return link->driver->suspend(link, state);
	347	}
	348
	349	static int card_resume(struct pnp_dev *dev)
	350	{
	351	struct pnp_card_link *link = dev->card_link;
	352	if (link->pm_state.event == PM_EVENT_ON)
	353	return 0;
	354	link->pm_state = PMSG_ON;
	355	link->driver->resume(link);
	356	return 0;
	357	}
	358
1da177e4 LT	359	/**
	360	* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
	361	* @drv: pointer to the driver to register
	362	*/
	363
	364	int pnp_register_card_driver(struct pnp_card_driver * drv)
	365	{
	366	int count = 0;
	367	struct list_head pos, temp;
	368
	369	drv->link.name = drv->name;
	370	drv->link.id_table = NULL; /* this will disable auto matching */
	371	drv->link.flags = drv->flags;
	372	drv->link.probe = NULL;
	373	drv->link.remove = &card_remove_first;
4c98cfef TI	374	drv->link.suspend = drv->suspend ? card_suspend : NULL;
4c98cfef TI	375	drv->link.resume = drv->resume ? card_resume : NULL;
1da177e4 LT	376
	377	spin_lock(&pnp_lock);
	378	list_add_tail(&drv->global_list, &pnp_card_drivers);
	379	spin_unlock(&pnp_lock);
	380	pnp_register_driver(&drv->link);
	381
	382	list_for_each_safe(pos,temp,&pnp_cards){
	383	struct pnp_card *card = list_entry(pos, struct pnp_card, global_list);
	384	count += card_probe(card,drv);
	385	}
	386	return count;
	387	}
	388
	389	/**
	390	* pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
	391	* @drv: pointer to the driver to unregister
	392	*/
	393
	394	void pnp_unregister_card_driver(struct pnp_card_driver * drv)
	395	{
	396	spin_lock(&pnp_lock);
	397	list_del(&drv->global_list);
	398	spin_unlock(&pnp_lock);
	399	pnp_unregister_driver(&drv->link);
	400	}
	401
b449f63c	402	#if 0
1da177e4 LT	403	EXPORT_SYMBOL(pnp_add_card);
	404	EXPORT_SYMBOL(pnp_remove_card);
	405	EXPORT_SYMBOL(pnp_add_card_device);
	406	EXPORT_SYMBOL(pnp_remove_card_device);
	407	EXPORT_SYMBOL(pnp_add_card_id);
b449f63c	408	#endif /* 0 */
1da177e4 LT	409	EXPORT_SYMBOL(pnp_request_card_device);
	410	EXPORT_SYMBOL(pnp_release_card_device);
	411	EXPORT_SYMBOL(pnp_register_card_driver);
	412	EXPORT_SYMBOL(pnp_unregister_card_driver);