[deliverable/linux.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)
{
	int rc = device_create_file(&card->dev, &dev_attr_name);
	if (rc)
		return rc;

	rc = device_create_file(&card->dev, &dev_attr_card_id);
	if (rc)
		goto err_name;

	return 0;

      err_name:
	device_remove_file(&card->dev, &dev_attr_name);
	return rc;
}

/**
 * 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:
	dev->card_link = clink;
	dev->dev.driver = &drv->link.driver;
	if (pnp_bus_type.probe(&dev->dev))
		goto err_out;
	if (device_bind_driver(&dev->dev))
		goto err_out;

	return dev;

      err_out:
	dev->dev.driver = NULL;
	dev->card_link = NULL;
	return NULL;
}

/**
 * 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;
	drv->link.remove = &card_remove;
	device_release_driver(&dev->dev);
	drv->link.remove = &card_remove_first;
}

/*
 * 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	15
9dd78466 BH	16	static const struct pnp_card_device_id match_card(struct pnp_card_driver drv,
9dd78466 BH	17	struct pnp_card *card)
1da177e4	18	{
9dd78466 BH	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)) {
1da177e4 LT	22	int i = 0;
	23	for (;;) {
	24	int found;
	25	struct pnp_dev *dev;
9dd78466 BH	26	if (i == PNP_MAX_DEVICES
9dd78466 BH	27	\|\| !*drv_id->devs[i].id)
1da177e4 LT	28	return drv_id;
	29	found = 0;
	30	card_for_each_dev(card, dev) {
9dd78466 BH	31	if (compare_pnp_id
9dd78466 BH	32	(dev->id, drv_id->devs[i].id)) {
1da177e4 LT	33	found = 1;
	34	break;
	35	}
	36	}
9dd78466	37	if (!found)
1da177e4 LT	38	break;
	39	i++;
	40	}
	41	}
	42	drv_id++;
	43	}
	44	return NULL;
	45	}
	46
9dd78466	47	static void card_remove(struct pnp_dev *dev)
1da177e4 LT	48	{
	49	dev->card_link = NULL;
	50	}
982c6094	51
9dd78466	52	static void card_remove_first(struct pnp_dev *dev)
1da177e4	53	{
9dd78466	54	struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
1da177e4 LT	55	if (!dev->card \|\| !drv)
	56	return;
	57	if (drv->remove)
	58	drv->remove(dev->card_link);
	59	drv->link.remove = &card_remove;
	60	kfree(dev->card_link);
	61	card_remove(dev);
	62	}
	63
a9adb8db	64	static int card_probe(struct pnp_card card, struct pnp_card_driver drv)
1da177e4	65	{
a9adb8db JJ	66	const struct pnp_card_device_id *id;
	67	struct pnp_card_link *clink;
	68	struct pnp_dev *dev;
	69
	70	if (!drv->probe)
	71	return 0;
9dd78466	72	id = match_card(drv, card);
a9adb8db JJ	73	if (!id)
	74	return 0;
	75
	76	clink = pnp_alloc(sizeof(*clink));
	77	if (!clink)
	78	return 0;
	79	clink->card = card;
	80	clink->driver = drv;
	81	clink->pm_state = PMSG_ON;
	82
	83	if (drv->probe(clink, id) >= 0)
	84	return 1;
	85
	86	/* Recovery */
	87	card_for_each_dev(card, dev) {
	88	if (dev->card_link == clink)
	89	pnp_release_card_device(dev);
1da177e4	90	}
a9adb8db	91	kfree(clink);
1da177e4 LT	92	return 0;
	93	}
	94
	95	/**
	96	* pnp_add_card_id - adds an EISA id to the specified card
	97	* @id: pointer to a pnp_id structure
	98	* @card: pointer to the desired card
	99	*
	100	*/
	101
9dd78466	102	int pnp_add_card_id(struct pnp_id id, struct pnp_card card)
1da177e4	103	{
9dd78466	104	struct pnp_id *ptr;
1da177e4 LT	105	if (!id)
	106	return -EINVAL;
	107	if (!card)
	108	return -EINVAL;
	109	id->next = NULL;
	110	ptr = card->id;
	111	while (ptr && ptr->next)
	112	ptr = ptr->next;
	113	if (ptr)
	114	ptr->next = id;
	115	else
	116	card->id = id;
	117	return 0;
	118	}
	119
9dd78466	120	static void pnp_free_card_ids(struct pnp_card *card)
1da177e4	121	{
9dd78466	122	struct pnp_id *id;
1da177e4 LT	123	struct pnp_id *next;
	124	if (!card)
	125	return;
	126	id = card->id;
	127	while (id) {
	128	next = id->next;
	129	kfree(id);
	130	id = next;
	131	}
	132	}
	133
	134	static void pnp_release_card(struct device *dmdev)
	135	{
9dd78466	136	struct pnp_card *card = to_pnp_card(dmdev);
1da177e4 LT	137	pnp_free_card_ids(card);
	138	kfree(card);
	139	}
	140
9dd78466 BH	141	static ssize_t pnp_show_card_name(struct device *dmdev,
9dd78466 BH	142	struct device_attribute attr, char buf)
1da177e4 LT	143	{
	144	char *str = buf;
	145	struct pnp_card *card = to_pnp_card(dmdev);
9dd78466	146	str += sprintf(str, "%s\n", card->name);
1da177e4 LT	147	return (str - buf);
	148	}
	149
9dd78466	150	static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
1da177e4	151
9dd78466 BH	152	static ssize_t pnp_show_card_ids(struct device *dmdev,
9dd78466 BH	153	struct device_attribute attr, char buf)
1da177e4 LT	154	{
	155	char *str = buf;
	156	struct pnp_card *card = to_pnp_card(dmdev);
9dd78466	157	struct pnp_id *pos = card->id;
1da177e4 LT	158
1da177e4 LT	159	while (pos) {
9dd78466	160	str += sprintf(str, "%s\n", pos->id);
1da177e4 LT	161	pos = pos->next;
	162	}
	163	return (str - buf);
	164	}
	165
9dd78466	166	static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
1da177e4 LT	167
	168	static int pnp_interface_attach_card(struct pnp_card *card)
	169	{
9dd78466 BH	170	int rc = device_create_file(&card->dev, &dev_attr_name);
	171	if (rc)
	172	return rc;
bfc7ee20	173
9dd78466 BH	174	rc = device_create_file(&card->dev, &dev_attr_card_id);
	175	if (rc)
	176	goto err_name;
bfc7ee20	177
1da177e4	178	return 0;
bfc7ee20	179
9dd78466 BH	180	err_name:
9dd78466 BH	181	device_remove_file(&card->dev, &dev_attr_name);
bfc7ee20	182	return rc;
1da177e4 LT	183	}
	184
	185	/**
	186	* pnp_add_card - adds a PnP card to the PnP Layer
	187	* @card: pointer to the card to add
	188	*/
	189
9dd78466	190	int pnp_add_card(struct pnp_card *card)
1da177e4 LT	191	{
1da177e4 LT	192	int error;
9dd78466	193	struct list_head pos, temp;
1da177e4 LT	194	if (!card \|\| !card->protocol)
	195	return -EINVAL;
	196
9dd78466 BH	197	sprintf(card->dev.bus_id, "%02x:%02x", card->protocol->number,
9dd78466 BH	198	card->number);
1da177e4 LT	199	card->dev.parent = &card->protocol->dev;
	200	card->dev.bus = NULL;
	201	card->dev.release = &pnp_release_card;
	202	error = device_register(&card->dev);
	203
	204	if (error == 0) {
	205	pnp_interface_attach_card(card);
	206	spin_lock(&pnp_lock);
	207	list_add_tail(&card->global_list, &pnp_cards);
	208	list_add_tail(&card->protocol_list, &card->protocol->cards);
	209	spin_unlock(&pnp_lock);
	210
	211	/* we wait until now to add devices in order to ensure the drivers
	212	* will be able to use all of the related devices on the card
	213	* without waiting any unresonable length of time */
9dd78466	214	list_for_each(pos, &card->devices) {
1da177e4 LT	215	struct pnp_dev *dev = card_to_pnp_dev(pos);
	216	__pnp_add_device(dev);
	217	}
	218
	219	/* match with card drivers */
9dd78466 BH	220	list_for_each_safe(pos, temp, &pnp_card_drivers) {
	221	struct pnp_card_driver *drv =
	222	list_entry(pos, struct pnp_card_driver,
	223	global_list);
	224	card_probe(card, drv);
1da177e4 LT	225	}
1da177e4 LT	226	} else
9dd78466 BH	227	pnp_err("sysfs failure, card '%s' will be unavailable",
9dd78466 BH	228	card->dev.bus_id);
1da177e4 LT	229	return error;
	230	}
	231
	232	/**
	233	* pnp_remove_card - removes a PnP card from the PnP Layer
	234	* @card: pointer to the card to remove
	235	*/
	236
9dd78466	237	void pnp_remove_card(struct pnp_card *card)
1da177e4 LT	238	{
	239	struct list_head pos, temp;
	240	if (!card)
	241	return;
	242	device_unregister(&card->dev);
	243	spin_lock(&pnp_lock);
	244	list_del(&card->global_list);
	245	list_del(&card->protocol_list);
	246	spin_unlock(&pnp_lock);
9dd78466	247	list_for_each_safe(pos, temp, &card->devices) {
1da177e4 LT	248	struct pnp_dev *dev = card_to_pnp_dev(pos);
	249	pnp_remove_card_device(dev);
	250	}
	251	}
	252
	253	/**
	254	* pnp_add_card_device - adds a device to the specified card
	255	* @card: pointer to the card to add to
	256	* @dev: pointer to the device to add
	257	*/
	258
9dd78466	259	int pnp_add_card_device(struct pnp_card card, struct pnp_dev dev)
1da177e4 LT	260	{
	261	if (!card \|\| !dev \|\| !dev->protocol)
	262	return -EINVAL;
	263	dev->dev.parent = &card->dev;
	264	dev->card_link = NULL;
9dd78466 BH	265	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%02x:%02x.%02x",
9dd78466 BH	266	dev->protocol->number, card->number, dev->number);
1da177e4 LT	267	spin_lock(&pnp_lock);
	268	dev->card = card;
	269	list_add_tail(&dev->card_list, &card->devices);
	270	spin_unlock(&pnp_lock);
	271	return 0;
	272	}
	273
	274	/**
	275	* pnp_remove_card_device- removes a device from the specified card
1da177e4 LT	276	* @dev: pointer to the device to remove
	277	*/
	278
9dd78466	279	void pnp_remove_card_device(struct pnp_dev *dev)
1da177e4 LT	280	{
	281	spin_lock(&pnp_lock);
	282	dev->card = NULL;
	283	list_del(&dev->card_list);
	284	spin_unlock(&pnp_lock);
	285	__pnp_remove_device(dev);
	286	}
	287
	288	/**
	289	* pnp_request_card_device - Searches for a PnP device under the specified card
3d41088f	290	* @clink: pointer to the card link, cannot be NULL
1da177e4 LT	291	* @id: pointer to a PnP ID structure that explains the rules for finding the device
	292	* @from: Starting place to search from. If NULL it will start from the begining.
	293	*/
	294
9dd78466 BH	295	struct pnp_dev pnp_request_card_device(struct pnp_card_link clink,
9dd78466 BH	296	const char id, struct pnp_dev from)
1da177e4	297	{
9dd78466 BH	298	struct list_head *pos;
	299	struct pnp_dev *dev;
	300	struct pnp_card_driver *drv;
	301	struct pnp_card *card;
1da177e4 LT	302	if (!clink \|\| !id)
	303	goto done;
	304	card = clink->card;
	305	drv = clink->driver;
	306	if (!from) {
	307	pos = card->devices.next;
	308	} else {
	309	if (from->card != card)
	310	goto done;
	311	pos = from->card_list.next;
	312	}
	313	while (pos != &card->devices) {
	314	dev = card_to_pnp_dev(pos);
9dd78466	315	if ((!dev->card_link) && compare_pnp_id(dev->id, id))
1da177e4 LT	316	goto found;
	317	pos = pos->next;
	318	}
	319
9dd78466	320	done:
1da177e4 LT	321	return NULL;
1da177e4 LT	322
9dd78466	323	found:
1da177e4 LT	324	dev->card_link = clink;
1da177e4 LT	325	dev->dev.driver = &drv->link.driver;
bfc7ee20 JG	326	if (pnp_bus_type.probe(&dev->dev))
	327	goto err_out;
	328	if (device_bind_driver(&dev->dev))
	329	goto err_out;
	330
1da177e4	331	return dev;
bfc7ee20	332
9dd78466	333	err_out:
bfc7ee20 JG	334	dev->dev.driver = NULL;
bfc7ee20 JG	335	dev->card_link = NULL;
bfc7ee20	336	return NULL;
1da177e4 LT	337	}
	338
	339	/**
	340	* pnp_release_card_device - call this when the driver no longer needs the device
	341	* @dev: pointer to the PnP device stucture
	342	*/
	343
9dd78466	344	void pnp_release_card_device(struct pnp_dev *dev)
1da177e4	345	{
9dd78466	346	struct pnp_card_driver *drv = dev->card_link->driver;
1da177e4 LT	347	if (!drv)
1da177e4 LT	348	return;
1da177e4 LT	349	drv->link.remove = &card_remove;
	350	device_release_driver(&dev->dev);
	351	drv->link.remove = &card_remove_first;
1da177e4 LT	352	}
1da177e4 LT	353
4c98cfef TI	354	/*
	355	* suspend/resume callbacks
	356	*/
	357	static int card_suspend(struct pnp_dev *dev, pm_message_t state)
	358	{
	359	struct pnp_card_link *link = dev->card_link;
	360	if (link->pm_state.event == state.event)
	361	return 0;
	362	link->pm_state = state;
	363	return link->driver->suspend(link, state);
	364	}
	365
	366	static int card_resume(struct pnp_dev *dev)
	367	{
	368	struct pnp_card_link *link = dev->card_link;
	369	if (link->pm_state.event == PM_EVENT_ON)
	370	return 0;
	371	link->pm_state = PMSG_ON;
	372	link->driver->resume(link);
	373	return 0;
	374	}
	375
1da177e4 LT	376	/**
	377	* pnp_register_card_driver - registers a PnP card driver with the PnP Layer
	378	* @drv: pointer to the driver to register
	379	*/
	380
9dd78466	381	int pnp_register_card_driver(struct pnp_card_driver *drv)
1da177e4	382	{
982c6094	383	int error;
1da177e4 LT	384	struct list_head pos, temp;
	385
	386	drv->link.name = drv->name;
	387	drv->link.id_table = NULL; /* this will disable auto matching */
	388	drv->link.flags = drv->flags;
	389	drv->link.probe = NULL;
	390	drv->link.remove = &card_remove_first;
4c98cfef TI	391	drv->link.suspend = drv->suspend ? card_suspend : NULL;
4c98cfef TI	392	drv->link.resume = drv->resume ? card_resume : NULL;
1da177e4	393
982c6094 BH	394	error = pnp_register_driver(&drv->link);
	395	if (error < 0)
	396	return error;
d1d051b2	397
1da177e4 LT	398	spin_lock(&pnp_lock);
	399	list_add_tail(&drv->global_list, &pnp_card_drivers);
	400	spin_unlock(&pnp_lock);
d1d051b2	401
9dd78466 BH	402	list_for_each_safe(pos, temp, &pnp_cards) {
	403	struct pnp_card *card =
	404	list_entry(pos, struct pnp_card, global_list);
	405	card_probe(card, drv);
1da177e4	406	}
982c6094	407	return 0;
1da177e4 LT	408	}
	409
	410	/**
	411	* pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
	412	* @drv: pointer to the driver to unregister
	413	*/
	414
9dd78466	415	void pnp_unregister_card_driver(struct pnp_card_driver *drv)
1da177e4 LT	416	{
	417	spin_lock(&pnp_lock);
	418	list_del(&drv->global_list);
	419	spin_unlock(&pnp_lock);
	420	pnp_unregister_driver(&drv->link);
	421	}
	422
b449f63c	423	#if 0
1da177e4 LT	424	EXPORT_SYMBOL(pnp_add_card);
	425	EXPORT_SYMBOL(pnp_remove_card);
	426	EXPORT_SYMBOL(pnp_add_card_device);
	427	EXPORT_SYMBOL(pnp_remove_card_device);
	428	EXPORT_SYMBOL(pnp_add_card_id);
9dd78466	429	#endif /* 0 */
1da177e4 LT	430	EXPORT_SYMBOL(pnp_request_card_device);
	431	EXPORT_SYMBOL(pnp_release_card_device);
	432	EXPORT_SYMBOL(pnp_register_card_driver);
	433	EXPORT_SYMBOL(pnp_unregister_card_driver);